4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <linux/utsname.h>
40 #include <linux/delay.h>
41 #include <linux/errno.h>
42 #include <linux/string.h>
43 #include <linux/sunrpc/clnt.h>
44 #include <linux/nfs.h>
45 #include <linux/nfs4.h>
46 #include <linux/nfs_fs.h>
47 #include <linux/nfs_page.h>
48 #include <linux/smp_lock.h>
49 #include <linux/namei.h>
50 #include <linux/mount.h>
53 #include "delegation.h"
56 #define NFSDBG_FACILITY NFSDBG_PROC
58 #define NFS4_POLL_RETRY_MIN (HZ/10)
59 #define NFS4_POLL_RETRY_MAX (15*HZ)
62 static int _nfs4_proc_open(struct nfs4_opendata *data);
63 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
64 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *);
65 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry);
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);
69 /* Prevent leaks of NFSv4 errors into userland */
70 int nfs4_map_errors(int err)
73 dprintk("%s could not handle NFSv4 error %d\n",
81 * This is our standard bitmap for GETATTR requests.
83 const u32 nfs4_fattr_bitmap[2] = {
88 | FATTR4_WORD0_FILEID,
90 | FATTR4_WORD1_NUMLINKS
92 | FATTR4_WORD1_OWNER_GROUP
94 | FATTR4_WORD1_SPACE_USED
95 | FATTR4_WORD1_TIME_ACCESS
96 | FATTR4_WORD1_TIME_METADATA
97 | FATTR4_WORD1_TIME_MODIFY
100 const u32 nfs4_statfs_bitmap[2] = {
101 FATTR4_WORD0_FILES_AVAIL
102 | FATTR4_WORD0_FILES_FREE
103 | FATTR4_WORD0_FILES_TOTAL,
104 FATTR4_WORD1_SPACE_AVAIL
105 | FATTR4_WORD1_SPACE_FREE
106 | FATTR4_WORD1_SPACE_TOTAL
109 const u32 nfs4_pathconf_bitmap[2] = {
111 | FATTR4_WORD0_MAXNAME,
115 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
116 | FATTR4_WORD0_MAXREAD
117 | FATTR4_WORD0_MAXWRITE
118 | FATTR4_WORD0_LEASE_TIME,
122 const u32 nfs4_fs_locations_bitmap[2] = {
124 | FATTR4_WORD0_CHANGE
127 | FATTR4_WORD0_FILEID
128 | FATTR4_WORD0_FS_LOCATIONS,
130 | FATTR4_WORD1_NUMLINKS
132 | FATTR4_WORD1_OWNER_GROUP
133 | FATTR4_WORD1_RAWDEV
134 | FATTR4_WORD1_SPACE_USED
135 | FATTR4_WORD1_TIME_ACCESS
136 | FATTR4_WORD1_TIME_METADATA
137 | FATTR4_WORD1_TIME_MODIFY
138 | FATTR4_WORD1_MOUNTED_ON_FILEID
141 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
142 struct nfs4_readdir_arg *readdir)
146 BUG_ON(readdir->count < 80);
148 readdir->cookie = cookie;
149 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
154 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
159 * NFSv4 servers do not return entries for '.' and '..'
160 * Therefore, we fake these entries here. We let '.'
161 * have cookie 0 and '..' have cookie 1. Note that
162 * when talking to the server, we always send cookie 0
165 start = p = kmap_atomic(*readdir->pages, KM_USER0);
168 *p++ = xdr_one; /* next */
169 *p++ = xdr_zero; /* cookie, first word */
170 *p++ = xdr_one; /* cookie, second word */
171 *p++ = xdr_one; /* entry len */
172 memcpy(p, ".\0\0\0", 4); /* entry */
174 *p++ = xdr_one; /* bitmap length */
175 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
176 *p++ = htonl(8); /* attribute buffer length */
177 p = xdr_encode_hyper(p, dentry->d_inode->i_ino);
180 *p++ = xdr_one; /* next */
181 *p++ = xdr_zero; /* cookie, first word */
182 *p++ = xdr_two; /* cookie, second word */
183 *p++ = xdr_two; /* entry len */
184 memcpy(p, "..\0\0", 4); /* entry */
186 *p++ = xdr_one; /* bitmap length */
187 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
188 *p++ = htonl(8); /* attribute buffer length */
189 p = xdr_encode_hyper(p, dentry->d_parent->d_inode->i_ino);
191 readdir->pgbase = (char *)p - (char *)start;
192 readdir->count -= readdir->pgbase;
193 kunmap_atomic(start, KM_USER0);
196 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
198 struct nfs_client *clp = server->nfs_client;
199 spin_lock(&clp->cl_lock);
200 if (time_before(clp->cl_last_renewal,timestamp))
201 clp->cl_last_renewal = timestamp;
202 spin_unlock(&clp->cl_lock);
205 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
207 struct nfs_inode *nfsi = NFS_I(dir);
209 spin_lock(&dir->i_lock);
210 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
211 if (cinfo->before == nfsi->change_attr && cinfo->atomic)
212 nfsi->change_attr = cinfo->after;
213 spin_unlock(&dir->i_lock);
216 struct nfs4_opendata {
218 struct nfs_openargs o_arg;
219 struct nfs_openres o_res;
220 struct nfs_open_confirmargs c_arg;
221 struct nfs_open_confirmres c_res;
222 struct nfs_fattr f_attr;
223 struct nfs_fattr dir_attr;
226 struct nfs4_state_owner *owner;
228 unsigned long timestamp;
233 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
234 struct nfs4_state_owner *sp, int flags,
235 const struct iattr *attrs)
237 struct dentry *parent = dget_parent(path->dentry);
238 struct inode *dir = parent->d_inode;
239 struct nfs_server *server = NFS_SERVER(dir);
240 struct nfs4_opendata *p;
242 p = kzalloc(sizeof(*p), GFP_KERNEL);
245 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
246 if (p->o_arg.seqid == NULL)
248 atomic_set(&p->count, 1);
249 p->path.mnt = mntget(path->mnt);
250 p->path.dentry = dget(path->dentry);
253 atomic_inc(&sp->so_count);
254 p->o_arg.fh = NFS_FH(dir);
255 p->o_arg.open_flags = flags,
256 p->o_arg.clientid = server->nfs_client->cl_clientid;
257 p->o_arg.id = sp->so_id;
258 p->o_arg.name = &p->path.dentry->d_name;
259 p->o_arg.server = server;
260 p->o_arg.bitmask = server->attr_bitmask;
261 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
262 p->o_res.f_attr = &p->f_attr;
263 p->o_res.dir_attr = &p->dir_attr;
264 p->o_res.server = server;
265 nfs_fattr_init(&p->f_attr);
266 nfs_fattr_init(&p->dir_attr);
267 if (flags & O_EXCL) {
268 u32 *s = (u32 *) p->o_arg.u.verifier.data;
271 } else if (flags & O_CREAT) {
272 p->o_arg.u.attrs = &p->attrs;
273 memcpy(&p->attrs, attrs, sizeof(p->attrs));
275 p->c_arg.fh = &p->o_res.fh;
276 p->c_arg.stateid = &p->o_res.stateid;
277 p->c_arg.seqid = p->o_arg.seqid;
286 static void nfs4_opendata_free(struct nfs4_opendata *p)
288 if (p != NULL && atomic_dec_and_test(&p->count)) {
289 nfs_free_seqid(p->o_arg.seqid);
290 nfs4_put_state_owner(p->owner);
292 dput(p->path.dentry);
298 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
303 rpc_clnt_sigmask(task->tk_client, &oldset);
304 ret = rpc_wait_for_completion_task(task);
305 rpc_clnt_sigunmask(task->tk_client, &oldset);
309 static inline void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
311 switch (open_flags) {
318 case FMODE_READ|FMODE_WRITE:
323 static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
325 struct inode *inode = state->inode;
327 open_flags &= (FMODE_READ|FMODE_WRITE);
328 /* Protect against nfs4_find_state_byowner() */
329 spin_lock(&state->owner->so_lock);
330 spin_lock(&inode->i_lock);
331 memcpy(&state->stateid, stateid, sizeof(state->stateid));
332 update_open_stateflags(state, open_flags);
333 nfs4_state_set_mode_locked(state, state->state | open_flags);
334 spin_unlock(&inode->i_lock);
335 spin_unlock(&state->owner->so_lock);
338 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
341 struct nfs4_state *state = NULL;
343 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
345 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
348 state = nfs4_get_open_state(inode, data->owner);
351 update_open_stateid(state, &data->o_res.stateid, data->o_arg.open_flags);
358 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
360 struct nfs_inode *nfsi = NFS_I(state->inode);
361 struct nfs_open_context *ctx;
363 spin_lock(&state->inode->i_lock);
364 list_for_each_entry(ctx, &nfsi->open_files, list) {
365 if (ctx->state != state)
367 get_nfs_open_context(ctx);
368 spin_unlock(&state->inode->i_lock);
371 spin_unlock(&state->inode->i_lock);
372 return ERR_PTR(-ENOENT);
375 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, nfs4_stateid *stateid)
379 opendata->o_arg.open_flags = openflags;
380 ret = _nfs4_proc_open(opendata);
383 memcpy(stateid->data, opendata->o_res.stateid.data,
384 sizeof(stateid->data));
388 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
390 nfs4_stateid stateid;
391 struct nfs4_state *newstate;
396 /* memory barrier prior to reading state->n_* */
398 if (state->n_rdwr != 0) {
399 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &stateid);
402 mode |= FMODE_READ|FMODE_WRITE;
403 if (opendata->o_res.delegation_type != 0)
404 delegation = opendata->o_res.delegation_type;
407 if (state->n_wronly != 0) {
408 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &stateid);
412 if (opendata->o_res.delegation_type != 0)
413 delegation = opendata->o_res.delegation_type;
416 if (state->n_rdonly != 0) {
417 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &stateid);
422 clear_bit(NFS_DELEGATED_STATE, &state->flags);
425 if (opendata->o_res.delegation_type == 0)
426 opendata->o_res.delegation_type = delegation;
427 opendata->o_arg.open_flags |= mode;
428 newstate = nfs4_opendata_to_nfs4_state(opendata);
429 if (newstate != NULL) {
430 if (opendata->o_res.delegation_type != 0) {
431 struct nfs_inode *nfsi = NFS_I(newstate->inode);
432 int delegation_flags = 0;
433 if (nfsi->delegation)
434 delegation_flags = nfsi->delegation->flags;
435 if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
436 nfs_inode_set_delegation(newstate->inode,
437 opendata->owner->so_cred,
440 nfs_inode_reclaim_delegation(newstate->inode,
441 opendata->owner->so_cred,
444 nfs4_close_state(&opendata->path, newstate, opendata->o_arg.open_flags);
446 if (newstate != state)
453 * reclaim state on the server after a reboot.
455 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
457 struct nfs_delegation *delegation = NFS_I(state->inode)->delegation;
458 struct nfs4_opendata *opendata;
459 int delegation_type = 0;
462 if (delegation != NULL) {
463 if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
464 memcpy(&state->stateid, &delegation->stateid,
465 sizeof(state->stateid));
466 set_bit(NFS_DELEGATED_STATE, &state->flags);
469 delegation_type = delegation->type;
471 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, NULL);
472 if (opendata == NULL)
474 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
475 opendata->o_arg.fh = NFS_FH(state->inode);
476 nfs_copy_fh(&opendata->o_res.fh, opendata->o_arg.fh);
477 opendata->o_arg.u.delegation_type = delegation_type;
478 status = nfs4_open_recover(opendata, state);
479 nfs4_opendata_free(opendata);
483 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
485 struct nfs_server *server = NFS_SERVER(state->inode);
486 struct nfs4_exception exception = { };
489 err = _nfs4_do_open_reclaim(ctx, state);
490 if (err != -NFS4ERR_DELAY)
492 nfs4_handle_exception(server, err, &exception);
493 } while (exception.retry);
497 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
499 struct nfs_open_context *ctx;
502 ctx = nfs4_state_find_open_context(state);
505 ret = nfs4_do_open_reclaim(ctx, state);
506 put_nfs_open_context(ctx);
510 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state)
512 struct nfs4_state_owner *sp = state->owner;
513 struct nfs4_opendata *opendata;
516 if (!test_bit(NFS_DELEGATED_STATE, &state->flags))
518 opendata = nfs4_opendata_alloc(&ctx->path, sp, 0, NULL);
519 if (opendata == NULL)
521 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
522 memcpy(opendata->o_arg.u.delegation.data, state->stateid.data,
523 sizeof(opendata->o_arg.u.delegation.data));
524 ret = nfs4_open_recover(opendata, state);
525 nfs4_opendata_free(opendata);
529 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state)
531 struct nfs4_exception exception = { };
532 struct nfs_server *server = NFS_SERVER(state->inode);
535 err = _nfs4_open_delegation_recall(ctx, state);
539 case -NFS4ERR_STALE_CLIENTID:
540 case -NFS4ERR_STALE_STATEID:
541 case -NFS4ERR_EXPIRED:
542 /* Don't recall a delegation if it was lost */
543 nfs4_schedule_state_recovery(server->nfs_client);
546 err = nfs4_handle_exception(server, err, &exception);
547 } while (exception.retry);
551 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
553 struct nfs4_opendata *data = calldata;
554 struct rpc_message msg = {
555 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
556 .rpc_argp = &data->c_arg,
557 .rpc_resp = &data->c_res,
558 .rpc_cred = data->owner->so_cred,
560 data->timestamp = jiffies;
561 rpc_call_setup(task, &msg, 0);
564 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
566 struct nfs4_opendata *data = calldata;
568 data->rpc_status = task->tk_status;
569 if (RPC_ASSASSINATED(task))
571 if (data->rpc_status == 0) {
572 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
573 sizeof(data->o_res.stateid.data));
574 renew_lease(data->o_res.server, data->timestamp);
576 nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
577 nfs_confirm_seqid(&data->owner->so_seqid, data->rpc_status);
580 static void nfs4_open_confirm_release(void *calldata)
582 struct nfs4_opendata *data = calldata;
583 struct nfs4_state *state = NULL;
585 /* If this request hasn't been cancelled, do nothing */
586 if (data->cancelled == 0)
588 /* In case of error, no cleanup! */
589 if (data->rpc_status != 0)
591 nfs_confirm_seqid(&data->owner->so_seqid, 0);
592 state = nfs4_opendata_to_nfs4_state(data);
594 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
596 nfs4_opendata_free(data);
599 static const struct rpc_call_ops nfs4_open_confirm_ops = {
600 .rpc_call_prepare = nfs4_open_confirm_prepare,
601 .rpc_call_done = nfs4_open_confirm_done,
602 .rpc_release = nfs4_open_confirm_release,
606 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
608 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
610 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
611 struct rpc_task *task;
614 atomic_inc(&data->count);
616 * If rpc_run_task() ends up calling ->rpc_release(), we
617 * want to ensure that it takes the 'error' code path.
619 data->rpc_status = -ENOMEM;
620 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data);
622 return PTR_ERR(task);
623 status = nfs4_wait_for_completion_rpc_task(task);
628 status = data->rpc_status;
633 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
635 struct nfs4_opendata *data = calldata;
636 struct nfs4_state_owner *sp = data->owner;
637 struct rpc_message msg = {
638 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
639 .rpc_argp = &data->o_arg,
640 .rpc_resp = &data->o_res,
641 .rpc_cred = sp->so_cred,
644 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
646 /* Update sequence id. */
647 data->o_arg.id = sp->so_id;
648 data->o_arg.clientid = sp->so_client->cl_clientid;
649 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
650 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
651 data->timestamp = jiffies;
652 rpc_call_setup(task, &msg, 0);
655 static void nfs4_open_done(struct rpc_task *task, void *calldata)
657 struct nfs4_opendata *data = calldata;
659 data->rpc_status = task->tk_status;
660 if (RPC_ASSASSINATED(task))
662 if (task->tk_status == 0) {
663 switch (data->o_res.f_attr->mode & S_IFMT) {
667 data->rpc_status = -ELOOP;
670 data->rpc_status = -EISDIR;
673 data->rpc_status = -ENOTDIR;
675 renew_lease(data->o_res.server, data->timestamp);
677 nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
680 static void nfs4_open_release(void *calldata)
682 struct nfs4_opendata *data = calldata;
683 struct nfs4_state *state = NULL;
685 /* If this request hasn't been cancelled, do nothing */
686 if (data->cancelled == 0)
688 /* In case of error, no cleanup! */
689 if (data->rpc_status != 0)
691 /* In case we need an open_confirm, no cleanup! */
692 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
694 nfs_confirm_seqid(&data->owner->so_seqid, 0);
695 state = nfs4_opendata_to_nfs4_state(data);
697 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
699 nfs4_opendata_free(data);
702 static const struct rpc_call_ops nfs4_open_ops = {
703 .rpc_call_prepare = nfs4_open_prepare,
704 .rpc_call_done = nfs4_open_done,
705 .rpc_release = nfs4_open_release,
709 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
711 static int _nfs4_proc_open(struct nfs4_opendata *data)
713 struct inode *dir = data->dir->d_inode;
714 struct nfs_server *server = NFS_SERVER(dir);
715 struct nfs_openargs *o_arg = &data->o_arg;
716 struct nfs_openres *o_res = &data->o_res;
717 struct rpc_task *task;
720 atomic_inc(&data->count);
722 * If rpc_run_task() ends up calling ->rpc_release(), we
723 * want to ensure that it takes the 'error' code path.
725 data->rpc_status = -ENOMEM;
726 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data);
728 return PTR_ERR(task);
729 status = nfs4_wait_for_completion_rpc_task(task);
734 status = data->rpc_status;
739 if (o_arg->open_flags & O_CREAT) {
740 update_changeattr(dir, &o_res->cinfo);
741 nfs_post_op_update_inode(dir, o_res->dir_attr);
743 nfs_refresh_inode(dir, o_res->dir_attr);
744 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
745 status = _nfs4_proc_open_confirm(data);
749 nfs_confirm_seqid(&data->owner->so_seqid, 0);
750 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
751 return server->nfs_client->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr);
755 static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags)
757 struct nfs_access_entry cache;
761 if (openflags & FMODE_READ)
763 if (openflags & FMODE_WRITE)
765 status = nfs_access_get_cached(inode, cred, &cache);
769 /* Be clever: ask server to check for all possible rights */
770 cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ;
772 cache.jiffies = jiffies;
773 status = _nfs4_proc_access(inode, &cache);
776 nfs_access_add_cache(inode, &cache);
778 if ((cache.mask & mask) == mask)
783 static int nfs4_recover_expired_lease(struct nfs_server *server)
785 struct nfs_client *clp = server->nfs_client;
789 ret = nfs4_wait_clnt_recover(server->client, clp);
792 if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
794 nfs4_schedule_state_recovery(clp);
801 * reclaim state on the server after a network partition.
802 * Assumes caller holds the appropriate lock
804 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
806 struct inode *inode = state->inode;
807 struct nfs_delegation *delegation = NFS_I(inode)->delegation;
808 struct nfs4_opendata *opendata;
809 int openflags = state->state & (FMODE_READ|FMODE_WRITE);
812 if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
813 ret = _nfs4_do_access(inode, ctx->cred, openflags);
816 memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid));
817 set_bit(NFS_DELEGATED_STATE, &state->flags);
820 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, openflags, NULL);
821 if (opendata == NULL)
823 ret = nfs4_open_recover(opendata, state);
824 if (ret == -ESTALE) {
825 /* Invalidate the state owner so we don't ever use it again */
826 nfs4_drop_state_owner(state->owner);
827 d_drop(ctx->path.dentry);
829 nfs4_opendata_free(opendata);
833 static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
835 struct nfs_server *server = NFS_SERVER(state->inode);
836 struct nfs4_exception exception = { };
840 err = _nfs4_open_expired(ctx, state);
841 if (err == -NFS4ERR_DELAY)
842 nfs4_handle_exception(server, err, &exception);
843 } while (exception.retry);
847 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
849 struct nfs_open_context *ctx;
852 ctx = nfs4_state_find_open_context(state);
855 ret = nfs4_do_open_expired(ctx, state);
856 put_nfs_open_context(ctx);
861 * Returns a referenced nfs4_state if there is an open delegation on the file
863 static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res)
865 struct nfs_delegation *delegation;
866 struct nfs_server *server = NFS_SERVER(inode);
867 struct nfs_client *clp = server->nfs_client;
868 struct nfs_inode *nfsi = NFS_I(inode);
869 struct nfs4_state_owner *sp = NULL;
870 struct nfs4_state *state = NULL;
871 int open_flags = flags & (FMODE_READ|FMODE_WRITE);
875 if (!(sp = nfs4_get_state_owner(server, cred))) {
876 dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__);
879 err = nfs4_recover_expired_lease(server);
881 goto out_put_state_owner;
882 /* Protect against reboot recovery - NOTE ORDER! */
883 down_read(&clp->cl_sem);
884 /* Protect against delegation recall */
885 down_read(&nfsi->rwsem);
886 delegation = NFS_I(inode)->delegation;
888 if (delegation == NULL || (delegation->type & open_flags) != open_flags)
891 state = nfs4_get_open_state(inode, sp);
896 if ((state->state & open_flags) == open_flags) {
897 spin_lock(&inode->i_lock);
898 update_open_stateflags(state, open_flags);
899 spin_unlock(&inode->i_lock);
901 } else if (state->state != 0)
902 goto out_put_open_state;
905 err = _nfs4_do_access(inode, cred, open_flags);
908 goto out_put_open_state;
909 set_bit(NFS_DELEGATED_STATE, &state->flags);
910 update_open_stateid(state, &delegation->stateid, open_flags);
912 nfs4_put_state_owner(sp);
913 up_read(&nfsi->rwsem);
914 up_read(&clp->cl_sem);
918 nfs4_put_open_state(state);
920 up_read(&nfsi->rwsem);
921 up_read(&clp->cl_sem);
923 nfs_inode_return_delegation(inode);
925 nfs4_put_state_owner(sp);
929 static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred)
931 struct nfs4_exception exception = { };
932 struct nfs4_state *res = ERR_PTR(-EIO);
936 err = _nfs4_open_delegated(inode, flags, cred, &res);
939 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode),
941 } while (exception.retry);
946 * Returns a referenced nfs4_state
948 static int _nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
950 struct nfs4_state_owner *sp;
951 struct nfs4_state *state = NULL;
952 struct nfs_server *server = NFS_SERVER(dir);
953 struct nfs_client *clp = server->nfs_client;
954 struct nfs4_opendata *opendata;
957 /* Protect against reboot recovery conflicts */
959 if (!(sp = nfs4_get_state_owner(server, cred))) {
960 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
963 status = nfs4_recover_expired_lease(server);
965 goto err_put_state_owner;
966 down_read(&clp->cl_sem);
968 opendata = nfs4_opendata_alloc(path, sp, flags, sattr);
969 if (opendata == NULL)
970 goto err_release_rwsem;
972 status = _nfs4_proc_open(opendata);
974 goto err_opendata_free;
977 state = nfs4_opendata_to_nfs4_state(opendata);
979 goto err_opendata_free;
980 if (opendata->o_res.delegation_type != 0)
981 nfs_inode_set_delegation(state->inode, cred, &opendata->o_res);
982 nfs4_opendata_free(opendata);
983 nfs4_put_state_owner(sp);
984 up_read(&clp->cl_sem);
988 nfs4_opendata_free(opendata);
990 up_read(&clp->cl_sem);
992 nfs4_put_state_owner(sp);
999 static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred)
1001 struct nfs4_exception exception = { };
1002 struct nfs4_state *res;
1006 status = _nfs4_do_open(dir, path, flags, sattr, cred, &res);
1009 /* NOTE: BAD_SEQID means the server and client disagree about the
1010 * book-keeping w.r.t. state-changing operations
1011 * (OPEN/CLOSE/LOCK/LOCKU...)
1012 * It is actually a sign of a bug on the client or on the server.
1014 * If we receive a BAD_SEQID error in the particular case of
1015 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1016 * have unhashed the old state_owner for us, and that we can
1017 * therefore safely retry using a new one. We should still warn
1018 * the user though...
1020 if (status == -NFS4ERR_BAD_SEQID) {
1021 printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n");
1022 exception.retry = 1;
1026 * BAD_STATEID on OPEN means that the server cancelled our
1027 * state before it received the OPEN_CONFIRM.
1028 * Recover by retrying the request as per the discussion
1029 * on Page 181 of RFC3530.
1031 if (status == -NFS4ERR_BAD_STATEID) {
1032 exception.retry = 1;
1035 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1036 status, &exception));
1037 } while (exception.retry);
1041 static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1042 struct iattr *sattr, struct nfs4_state *state)
1044 struct nfs_server *server = NFS_SERVER(inode);
1045 struct nfs_setattrargs arg = {
1046 .fh = NFS_FH(inode),
1049 .bitmask = server->attr_bitmask,
1051 struct nfs_setattrres res = {
1055 struct rpc_message msg = {
1056 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1060 unsigned long timestamp = jiffies;
1063 nfs_fattr_init(fattr);
1065 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1066 /* Use that stateid */
1067 } else if (state != NULL) {
1068 msg.rpc_cred = state->owner->so_cred;
1069 nfs4_copy_stateid(&arg.stateid, state, current->files);
1071 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1073 status = rpc_call_sync(server->client, &msg, 0);
1074 if (status == 0 && state != NULL)
1075 renew_lease(server, timestamp);
1079 static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1080 struct iattr *sattr, struct nfs4_state *state)
1082 struct nfs_server *server = NFS_SERVER(inode);
1083 struct nfs4_exception exception = { };
1086 err = nfs4_handle_exception(server,
1087 _nfs4_do_setattr(inode, fattr, sattr, state),
1089 } while (exception.retry);
1093 struct nfs4_closedata {
1095 struct inode *inode;
1096 struct nfs4_state *state;
1097 struct nfs_closeargs arg;
1098 struct nfs_closeres res;
1099 struct nfs_fattr fattr;
1100 unsigned long timestamp;
1103 static void nfs4_free_closedata(void *data)
1105 struct nfs4_closedata *calldata = data;
1106 struct nfs4_state_owner *sp = calldata->state->owner;
1108 nfs4_put_open_state(calldata->state);
1109 nfs_free_seqid(calldata->arg.seqid);
1110 nfs4_put_state_owner(sp);
1111 dput(calldata->path.dentry);
1112 mntput(calldata->path.mnt);
1116 static void nfs4_close_done(struct rpc_task *task, void *data)
1118 struct nfs4_closedata *calldata = data;
1119 struct nfs4_state *state = calldata->state;
1120 struct nfs_server *server = NFS_SERVER(calldata->inode);
1122 if (RPC_ASSASSINATED(task))
1124 /* hmm. we are done with the inode, and in the process of freeing
1125 * the state_owner. we keep this around to process errors
1127 nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
1128 switch (task->tk_status) {
1130 memcpy(&state->stateid, &calldata->res.stateid,
1131 sizeof(state->stateid));
1132 renew_lease(server, calldata->timestamp);
1134 case -NFS4ERR_STALE_STATEID:
1135 case -NFS4ERR_EXPIRED:
1138 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1139 rpc_restart_call(task);
1143 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1146 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1148 struct nfs4_closedata *calldata = data;
1149 struct nfs4_state *state = calldata->state;
1150 struct rpc_message msg = {
1151 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1152 .rpc_argp = &calldata->arg,
1153 .rpc_resp = &calldata->res,
1154 .rpc_cred = state->owner->so_cred,
1156 int mode = 0, old_mode;
1158 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1160 /* Recalculate the new open mode in case someone reopened the file
1161 * while we were waiting in line to be scheduled.
1163 spin_lock(&state->owner->so_lock);
1164 spin_lock(&calldata->inode->i_lock);
1165 mode = old_mode = state->state;
1166 if (state->n_rdwr == 0) {
1167 if (state->n_rdonly == 0)
1168 mode &= ~FMODE_READ;
1169 if (state->n_wronly == 0)
1170 mode &= ~FMODE_WRITE;
1172 nfs4_state_set_mode_locked(state, mode);
1173 spin_unlock(&calldata->inode->i_lock);
1174 spin_unlock(&state->owner->so_lock);
1175 if (mode == old_mode || test_bit(NFS_DELEGATED_STATE, &state->flags)) {
1176 /* Note: exit _without_ calling nfs4_close_done */
1177 task->tk_action = NULL;
1180 nfs_fattr_init(calldata->res.fattr);
1182 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1183 calldata->arg.open_flags = mode;
1184 calldata->timestamp = jiffies;
1185 rpc_call_setup(task, &msg, 0);
1188 static const struct rpc_call_ops nfs4_close_ops = {
1189 .rpc_call_prepare = nfs4_close_prepare,
1190 .rpc_call_done = nfs4_close_done,
1191 .rpc_release = nfs4_free_closedata,
1195 * It is possible for data to be read/written from a mem-mapped file
1196 * after the sys_close call (which hits the vfs layer as a flush).
1197 * This means that we can't safely call nfsv4 close on a file until
1198 * the inode is cleared. This in turn means that we are not good
1199 * NFSv4 citizens - we do not indicate to the server to update the file's
1200 * share state even when we are done with one of the three share
1201 * stateid's in the inode.
1203 * NOTE: Caller must be holding the sp->so_owner semaphore!
1205 int nfs4_do_close(struct path *path, struct nfs4_state *state)
1207 struct nfs_server *server = NFS_SERVER(state->inode);
1208 struct nfs4_closedata *calldata;
1209 struct nfs4_state_owner *sp = state->owner;
1210 struct rpc_task *task;
1211 int status = -ENOMEM;
1213 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1214 if (calldata == NULL)
1216 calldata->inode = state->inode;
1217 calldata->state = state;
1218 calldata->arg.fh = NFS_FH(state->inode);
1219 calldata->arg.stateid = &state->stateid;
1220 /* Serialization for the sequence id */
1221 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
1222 if (calldata->arg.seqid == NULL)
1223 goto out_free_calldata;
1224 calldata->arg.bitmask = server->attr_bitmask;
1225 calldata->res.fattr = &calldata->fattr;
1226 calldata->res.server = server;
1227 calldata->path.mnt = mntget(path->mnt);
1228 calldata->path.dentry = dget(path->dentry);
1230 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_close_ops, calldata);
1232 return PTR_ERR(task);
1238 nfs4_put_open_state(state);
1239 nfs4_put_state_owner(sp);
1243 static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state)
1247 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
1248 if (!IS_ERR(filp)) {
1249 struct nfs_open_context *ctx;
1250 ctx = (struct nfs_open_context *)filp->private_data;
1254 nfs4_close_state(path, state, nd->intent.open.flags);
1255 return PTR_ERR(filp);
1259 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1261 struct path path = {
1266 struct rpc_cred *cred;
1267 struct nfs4_state *state;
1270 if (nd->flags & LOOKUP_CREATE) {
1271 attr.ia_mode = nd->intent.open.create_mode;
1272 attr.ia_valid = ATTR_MODE;
1273 if (!IS_POSIXACL(dir))
1274 attr.ia_mode &= ~current->fs->umask;
1277 BUG_ON(nd->intent.open.flags & O_CREAT);
1280 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1282 return (struct dentry *)cred;
1283 state = nfs4_do_open(dir, &path, nd->intent.open.flags, &attr, cred);
1285 if (IS_ERR(state)) {
1286 if (PTR_ERR(state) == -ENOENT)
1287 d_add(dentry, NULL);
1288 return (struct dentry *)state;
1290 res = d_add_unique(dentry, igrab(state->inode));
1293 nfs4_intent_set_file(nd, &path, state);
1298 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1300 struct path path = {
1304 struct rpc_cred *cred;
1305 struct nfs4_state *state;
1307 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1309 return PTR_ERR(cred);
1310 state = nfs4_open_delegated(dentry->d_inode, openflags, cred);
1312 state = nfs4_do_open(dir, &path, openflags, NULL, cred);
1314 if (IS_ERR(state)) {
1315 switch (PTR_ERR(state)) {
1321 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1327 if (state->inode == dentry->d_inode) {
1328 nfs4_intent_set_file(nd, &path, state);
1331 nfs4_close_state(&path, state, openflags);
1338 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1340 struct nfs4_server_caps_res res = {};
1341 struct rpc_message msg = {
1342 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1343 .rpc_argp = fhandle,
1348 status = rpc_call_sync(server->client, &msg, 0);
1350 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1351 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1352 server->caps |= NFS_CAP_ACLS;
1353 if (res.has_links != 0)
1354 server->caps |= NFS_CAP_HARDLINKS;
1355 if (res.has_symlinks != 0)
1356 server->caps |= NFS_CAP_SYMLINKS;
1357 server->acl_bitmask = res.acl_bitmask;
1362 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1364 struct nfs4_exception exception = { };
1367 err = nfs4_handle_exception(server,
1368 _nfs4_server_capabilities(server, fhandle),
1370 } while (exception.retry);
1374 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1375 struct nfs_fsinfo *info)
1377 struct nfs4_lookup_root_arg args = {
1378 .bitmask = nfs4_fattr_bitmap,
1380 struct nfs4_lookup_res res = {
1382 .fattr = info->fattr,
1385 struct rpc_message msg = {
1386 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1390 nfs_fattr_init(info->fattr);
1391 return rpc_call_sync(server->client, &msg, 0);
1394 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1395 struct nfs_fsinfo *info)
1397 struct nfs4_exception exception = { };
1400 err = nfs4_handle_exception(server,
1401 _nfs4_lookup_root(server, fhandle, info),
1403 } while (exception.retry);
1408 * get the file handle for the "/" directory on the server
1410 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
1411 struct nfs_fsinfo *info)
1415 status = nfs4_lookup_root(server, fhandle, info);
1417 status = nfs4_server_capabilities(server, fhandle);
1419 status = nfs4_do_fsinfo(server, fhandle, info);
1420 return nfs4_map_errors(status);
1424 * Get locations and (maybe) other attributes of a referral.
1425 * Note that we'll actually follow the referral later when
1426 * we detect fsid mismatch in inode revalidation
1428 static int nfs4_get_referral(struct inode *dir, struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
1430 int status = -ENOMEM;
1431 struct page *page = NULL;
1432 struct nfs4_fs_locations *locations = NULL;
1434 page = alloc_page(GFP_KERNEL);
1437 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1438 if (locations == NULL)
1441 status = nfs4_proc_fs_locations(dir, name, locations, page);
1444 /* Make sure server returned a different fsid for the referral */
1445 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
1446 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__, name->name);
1451 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1452 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1454 fattr->mode = S_IFDIR;
1455 memset(fhandle, 0, sizeof(struct nfs_fh));
1464 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1466 struct nfs4_getattr_arg args = {
1468 .bitmask = server->attr_bitmask,
1470 struct nfs4_getattr_res res = {
1474 struct rpc_message msg = {
1475 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1480 nfs_fattr_init(fattr);
1481 return rpc_call_sync(server->client, &msg, 0);
1484 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1486 struct nfs4_exception exception = { };
1489 err = nfs4_handle_exception(server,
1490 _nfs4_proc_getattr(server, fhandle, fattr),
1492 } while (exception.retry);
1497 * The file is not closed if it is opened due to the a request to change
1498 * the size of the file. The open call will not be needed once the
1499 * VFS layer lookup-intents are implemented.
1501 * Close is called when the inode is destroyed.
1502 * If we haven't opened the file for O_WRONLY, we
1503 * need to in the size_change case to obtain a stateid.
1506 * Because OPEN is always done by name in nfsv4, it is
1507 * possible that we opened a different file by the same
1508 * name. We can recognize this race condition, but we
1509 * can't do anything about it besides returning an error.
1511 * This will be fixed with VFS changes (lookup-intent).
1514 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1515 struct iattr *sattr)
1517 struct rpc_cred *cred;
1518 struct inode *inode = dentry->d_inode;
1519 struct nfs_open_context *ctx;
1520 struct nfs4_state *state = NULL;
1523 nfs_fattr_init(fattr);
1525 cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0);
1527 return PTR_ERR(cred);
1529 /* Search for an existing open(O_WRITE) file */
1530 ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
1534 status = nfs4_do_setattr(inode, fattr, sattr, state);
1536 nfs_setattr_update_inode(inode, sattr);
1538 put_nfs_open_context(ctx);
1543 static int _nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1544 struct qstr *name, struct nfs_fh *fhandle,
1545 struct nfs_fattr *fattr)
1548 struct nfs4_lookup_arg args = {
1549 .bitmask = server->attr_bitmask,
1553 struct nfs4_lookup_res res = {
1558 struct rpc_message msg = {
1559 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1564 nfs_fattr_init(fattr);
1566 dprintk("NFS call lookupfh %s\n", name->name);
1567 status = rpc_call_sync(server->client, &msg, 0);
1568 dprintk("NFS reply lookupfh: %d\n", status);
1569 if (status == -NFS4ERR_MOVED)
1574 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1575 struct qstr *name, struct nfs_fh *fhandle,
1576 struct nfs_fattr *fattr)
1578 struct nfs4_exception exception = { };
1581 err = nfs4_handle_exception(server,
1582 _nfs4_proc_lookupfh(server, dirfh, name,
1585 } while (exception.retry);
1589 static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1590 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1593 struct nfs_server *server = NFS_SERVER(dir);
1594 struct nfs4_lookup_arg args = {
1595 .bitmask = server->attr_bitmask,
1596 .dir_fh = NFS_FH(dir),
1599 struct nfs4_lookup_res res = {
1604 struct rpc_message msg = {
1605 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1610 nfs_fattr_init(fattr);
1612 dprintk("NFS call lookup %s\n", name->name);
1613 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1614 if (status == -NFS4ERR_MOVED)
1615 status = nfs4_get_referral(dir, name, fattr, fhandle);
1616 dprintk("NFS reply lookup: %d\n", status);
1620 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1622 struct nfs4_exception exception = { };
1625 err = nfs4_handle_exception(NFS_SERVER(dir),
1626 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1628 } while (exception.retry);
1632 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1634 struct nfs4_accessargs args = {
1635 .fh = NFS_FH(inode),
1637 struct nfs4_accessres res = { 0 };
1638 struct rpc_message msg = {
1639 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1642 .rpc_cred = entry->cred,
1644 int mode = entry->mask;
1648 * Determine which access bits we want to ask for...
1650 if (mode & MAY_READ)
1651 args.access |= NFS4_ACCESS_READ;
1652 if (S_ISDIR(inode->i_mode)) {
1653 if (mode & MAY_WRITE)
1654 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1655 if (mode & MAY_EXEC)
1656 args.access |= NFS4_ACCESS_LOOKUP;
1658 if (mode & MAY_WRITE)
1659 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1660 if (mode & MAY_EXEC)
1661 args.access |= NFS4_ACCESS_EXECUTE;
1663 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1666 if (res.access & NFS4_ACCESS_READ)
1667 entry->mask |= MAY_READ;
1668 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1669 entry->mask |= MAY_WRITE;
1670 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1671 entry->mask |= MAY_EXEC;
1676 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1678 struct nfs4_exception exception = { };
1681 err = nfs4_handle_exception(NFS_SERVER(inode),
1682 _nfs4_proc_access(inode, entry),
1684 } while (exception.retry);
1689 * TODO: For the time being, we don't try to get any attributes
1690 * along with any of the zero-copy operations READ, READDIR,
1693 * In the case of the first three, we want to put the GETATTR
1694 * after the read-type operation -- this is because it is hard
1695 * to predict the length of a GETATTR response in v4, and thus
1696 * align the READ data correctly. This means that the GETATTR
1697 * may end up partially falling into the page cache, and we should
1698 * shift it into the 'tail' of the xdr_buf before processing.
1699 * To do this efficiently, we need to know the total length
1700 * of data received, which doesn't seem to be available outside
1703 * In the case of WRITE, we also want to put the GETATTR after
1704 * the operation -- in this case because we want to make sure
1705 * we get the post-operation mtime and size. This means that
1706 * we can't use xdr_encode_pages() as written: we need a variant
1707 * of it which would leave room in the 'tail' iovec.
1709 * Both of these changes to the XDR layer would in fact be quite
1710 * minor, but I decided to leave them for a subsequent patch.
1712 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1713 unsigned int pgbase, unsigned int pglen)
1715 struct nfs4_readlink args = {
1716 .fh = NFS_FH(inode),
1721 struct rpc_message msg = {
1722 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1727 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1730 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1731 unsigned int pgbase, unsigned int pglen)
1733 struct nfs4_exception exception = { };
1736 err = nfs4_handle_exception(NFS_SERVER(inode),
1737 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1739 } while (exception.retry);
1745 * We will need to arrange for the VFS layer to provide an atomic open.
1746 * Until then, this create/open method is prone to inefficiency and race
1747 * conditions due to the lookup, create, and open VFS calls from sys_open()
1748 * placed on the wire.
1750 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1751 * The file will be opened again in the subsequent VFS open call
1752 * (nfs4_proc_file_open).
1754 * The open for read will just hang around to be used by any process that
1755 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1759 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
1760 int flags, struct nameidata *nd)
1762 struct path path = {
1766 struct nfs4_state *state;
1767 struct rpc_cred *cred;
1770 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1772 status = PTR_ERR(cred);
1775 state = nfs4_do_open(dir, &path, flags, sattr, cred);
1777 if (IS_ERR(state)) {
1778 status = PTR_ERR(state);
1781 d_instantiate(dentry, igrab(state->inode));
1782 if (flags & O_EXCL) {
1783 struct nfs_fattr fattr;
1784 status = nfs4_do_setattr(state->inode, &fattr, sattr, state);
1786 nfs_setattr_update_inode(state->inode, sattr);
1788 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
1789 status = nfs4_intent_set_file(nd, &path, state);
1791 nfs4_close_state(&path, state, flags);
1796 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1798 struct nfs_server *server = NFS_SERVER(dir);
1799 struct nfs4_remove_arg args = {
1802 .bitmask = server->attr_bitmask,
1804 struct nfs_fattr dir_attr;
1805 struct nfs4_remove_res res = {
1807 .dir_attr = &dir_attr,
1809 struct rpc_message msg = {
1810 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1816 nfs_fattr_init(res.dir_attr);
1817 status = rpc_call_sync(server->client, &msg, 0);
1819 update_changeattr(dir, &res.cinfo);
1820 nfs_post_op_update_inode(dir, res.dir_attr);
1825 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1827 struct nfs4_exception exception = { };
1830 err = nfs4_handle_exception(NFS_SERVER(dir),
1831 _nfs4_proc_remove(dir, name),
1833 } while (exception.retry);
1837 struct unlink_desc {
1838 struct nfs4_remove_arg args;
1839 struct nfs4_remove_res res;
1840 struct nfs_fattr dir_attr;
1843 static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir,
1846 struct nfs_server *server = NFS_SERVER(dir->d_inode);
1847 struct unlink_desc *up;
1849 up = kmalloc(sizeof(*up), GFP_KERNEL);
1853 up->args.fh = NFS_FH(dir->d_inode);
1854 up->args.name = name;
1855 up->args.bitmask = server->attr_bitmask;
1856 up->res.server = server;
1857 up->res.dir_attr = &up->dir_attr;
1859 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1860 msg->rpc_argp = &up->args;
1861 msg->rpc_resp = &up->res;
1865 static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
1867 struct rpc_message *msg = &task->tk_msg;
1868 struct unlink_desc *up;
1870 if (msg->rpc_resp != NULL) {
1871 up = container_of(msg->rpc_resp, struct unlink_desc, res);
1872 update_changeattr(dir->d_inode, &up->res.cinfo);
1873 nfs_post_op_update_inode(dir->d_inode, up->res.dir_attr);
1875 msg->rpc_resp = NULL;
1876 msg->rpc_argp = NULL;
1881 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1882 struct inode *new_dir, struct qstr *new_name)
1884 struct nfs_server *server = NFS_SERVER(old_dir);
1885 struct nfs4_rename_arg arg = {
1886 .old_dir = NFS_FH(old_dir),
1887 .new_dir = NFS_FH(new_dir),
1888 .old_name = old_name,
1889 .new_name = new_name,
1890 .bitmask = server->attr_bitmask,
1892 struct nfs_fattr old_fattr, new_fattr;
1893 struct nfs4_rename_res res = {
1895 .old_fattr = &old_fattr,
1896 .new_fattr = &new_fattr,
1898 struct rpc_message msg = {
1899 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
1905 nfs_fattr_init(res.old_fattr);
1906 nfs_fattr_init(res.new_fattr);
1907 status = rpc_call_sync(server->client, &msg, 0);
1910 update_changeattr(old_dir, &res.old_cinfo);
1911 nfs_post_op_update_inode(old_dir, res.old_fattr);
1912 update_changeattr(new_dir, &res.new_cinfo);
1913 nfs_post_op_update_inode(new_dir, res.new_fattr);
1918 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1919 struct inode *new_dir, struct qstr *new_name)
1921 struct nfs4_exception exception = { };
1924 err = nfs4_handle_exception(NFS_SERVER(old_dir),
1925 _nfs4_proc_rename(old_dir, old_name,
1928 } while (exception.retry);
1932 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
1934 struct nfs_server *server = NFS_SERVER(inode);
1935 struct nfs4_link_arg arg = {
1936 .fh = NFS_FH(inode),
1937 .dir_fh = NFS_FH(dir),
1939 .bitmask = server->attr_bitmask,
1941 struct nfs_fattr fattr, dir_attr;
1942 struct nfs4_link_res res = {
1945 .dir_attr = &dir_attr,
1947 struct rpc_message msg = {
1948 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
1954 nfs_fattr_init(res.fattr);
1955 nfs_fattr_init(res.dir_attr);
1956 status = rpc_call_sync(server->client, &msg, 0);
1958 update_changeattr(dir, &res.cinfo);
1959 nfs_post_op_update_inode(dir, res.dir_attr);
1960 nfs_post_op_update_inode(inode, res.fattr);
1966 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
1968 struct nfs4_exception exception = { };
1971 err = nfs4_handle_exception(NFS_SERVER(inode),
1972 _nfs4_proc_link(inode, dir, name),
1974 } while (exception.retry);
1978 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1979 struct page *page, unsigned int len, struct iattr *sattr)
1981 struct nfs_server *server = NFS_SERVER(dir);
1982 struct nfs_fh fhandle;
1983 struct nfs_fattr fattr, dir_fattr;
1984 struct nfs4_create_arg arg = {
1985 .dir_fh = NFS_FH(dir),
1987 .name = &dentry->d_name,
1990 .bitmask = server->attr_bitmask,
1992 struct nfs4_create_res res = {
1996 .dir_fattr = &dir_fattr,
1998 struct rpc_message msg = {
1999 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
2005 if (len > NFS4_MAXPATHLEN)
2006 return -ENAMETOOLONG;
2008 arg.u.symlink.pages = &page;
2009 arg.u.symlink.len = len;
2010 nfs_fattr_init(&fattr);
2011 nfs_fattr_init(&dir_fattr);
2013 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2015 update_changeattr(dir, &res.dir_cinfo);
2016 nfs_post_op_update_inode(dir, res.dir_fattr);
2017 status = nfs_instantiate(dentry, &fhandle, &fattr);
2022 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2023 struct page *page, unsigned int len, struct iattr *sattr)
2025 struct nfs4_exception exception = { };
2028 err = nfs4_handle_exception(NFS_SERVER(dir),
2029 _nfs4_proc_symlink(dir, dentry, page,
2032 } while (exception.retry);
2036 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2037 struct iattr *sattr)
2039 struct nfs_server *server = NFS_SERVER(dir);
2040 struct nfs_fh fhandle;
2041 struct nfs_fattr fattr, dir_fattr;
2042 struct nfs4_create_arg arg = {
2043 .dir_fh = NFS_FH(dir),
2045 .name = &dentry->d_name,
2048 .bitmask = server->attr_bitmask,
2050 struct nfs4_create_res res = {
2054 .dir_fattr = &dir_fattr,
2056 struct rpc_message msg = {
2057 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2063 nfs_fattr_init(&fattr);
2064 nfs_fattr_init(&dir_fattr);
2066 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2068 update_changeattr(dir, &res.dir_cinfo);
2069 nfs_post_op_update_inode(dir, res.dir_fattr);
2070 status = nfs_instantiate(dentry, &fhandle, &fattr);
2075 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2076 struct iattr *sattr)
2078 struct nfs4_exception exception = { };
2081 err = nfs4_handle_exception(NFS_SERVER(dir),
2082 _nfs4_proc_mkdir(dir, dentry, sattr),
2084 } while (exception.retry);
2088 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2089 u64 cookie, struct page *page, unsigned int count, int plus)
2091 struct inode *dir = dentry->d_inode;
2092 struct nfs4_readdir_arg args = {
2097 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2099 struct nfs4_readdir_res res;
2100 struct rpc_message msg = {
2101 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2108 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
2109 dentry->d_parent->d_name.name,
2110 dentry->d_name.name,
2111 (unsigned long long)cookie);
2112 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2113 res.pgbase = args.pgbase;
2114 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2116 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2117 dprintk("%s: returns %d\n", __FUNCTION__, status);
2121 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2122 u64 cookie, struct page *page, unsigned int count, int plus)
2124 struct nfs4_exception exception = { };
2127 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2128 _nfs4_proc_readdir(dentry, cred, cookie,
2131 } while (exception.retry);
2135 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2136 struct iattr *sattr, dev_t rdev)
2138 struct nfs_server *server = NFS_SERVER(dir);
2140 struct nfs_fattr fattr, dir_fattr;
2141 struct nfs4_create_arg arg = {
2142 .dir_fh = NFS_FH(dir),
2144 .name = &dentry->d_name,
2146 .bitmask = server->attr_bitmask,
2148 struct nfs4_create_res res = {
2152 .dir_fattr = &dir_fattr,
2154 struct rpc_message msg = {
2155 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2160 int mode = sattr->ia_mode;
2162 nfs_fattr_init(&fattr);
2163 nfs_fattr_init(&dir_fattr);
2165 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2166 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2168 arg.ftype = NF4FIFO;
2169 else if (S_ISBLK(mode)) {
2171 arg.u.device.specdata1 = MAJOR(rdev);
2172 arg.u.device.specdata2 = MINOR(rdev);
2174 else if (S_ISCHR(mode)) {
2176 arg.u.device.specdata1 = MAJOR(rdev);
2177 arg.u.device.specdata2 = MINOR(rdev);
2180 arg.ftype = NF4SOCK;
2182 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2184 update_changeattr(dir, &res.dir_cinfo);
2185 nfs_post_op_update_inode(dir, res.dir_fattr);
2186 status = nfs_instantiate(dentry, &fh, &fattr);
2191 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2192 struct iattr *sattr, dev_t rdev)
2194 struct nfs4_exception exception = { };
2197 err = nfs4_handle_exception(NFS_SERVER(dir),
2198 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2200 } while (exception.retry);
2204 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2205 struct nfs_fsstat *fsstat)
2207 struct nfs4_statfs_arg args = {
2209 .bitmask = server->attr_bitmask,
2211 struct rpc_message msg = {
2212 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2217 nfs_fattr_init(fsstat->fattr);
2218 return rpc_call_sync(server->client, &msg, 0);
2221 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2223 struct nfs4_exception exception = { };
2226 err = nfs4_handle_exception(server,
2227 _nfs4_proc_statfs(server, fhandle, fsstat),
2229 } while (exception.retry);
2233 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2234 struct nfs_fsinfo *fsinfo)
2236 struct nfs4_fsinfo_arg args = {
2238 .bitmask = server->attr_bitmask,
2240 struct rpc_message msg = {
2241 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2246 return rpc_call_sync(server->client, &msg, 0);
2249 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2251 struct nfs4_exception exception = { };
2255 err = nfs4_handle_exception(server,
2256 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2258 } while (exception.retry);
2262 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2264 nfs_fattr_init(fsinfo->fattr);
2265 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2268 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2269 struct nfs_pathconf *pathconf)
2271 struct nfs4_pathconf_arg args = {
2273 .bitmask = server->attr_bitmask,
2275 struct rpc_message msg = {
2276 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2278 .rpc_resp = pathconf,
2281 /* None of the pathconf attributes are mandatory to implement */
2282 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2283 memset(pathconf, 0, sizeof(*pathconf));
2287 nfs_fattr_init(pathconf->fattr);
2288 return rpc_call_sync(server->client, &msg, 0);
2291 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2292 struct nfs_pathconf *pathconf)
2294 struct nfs4_exception exception = { };
2298 err = nfs4_handle_exception(server,
2299 _nfs4_proc_pathconf(server, fhandle, pathconf),
2301 } while (exception.retry);
2305 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
2307 struct nfs_server *server = NFS_SERVER(data->inode);
2309 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
2310 rpc_restart_call(task);
2313 if (task->tk_status > 0)
2314 renew_lease(server, data->timestamp);
2318 static void nfs4_proc_read_setup(struct nfs_read_data *data)
2320 struct rpc_message msg = {
2321 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
2322 .rpc_argp = &data->args,
2323 .rpc_resp = &data->res,
2324 .rpc_cred = data->cred,
2327 data->timestamp = jiffies;
2329 rpc_call_setup(&data->task, &msg, 0);
2332 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
2334 struct inode *inode = data->inode;
2336 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2337 rpc_restart_call(task);
2340 if (task->tk_status >= 0) {
2341 renew_lease(NFS_SERVER(inode), data->timestamp);
2342 nfs_post_op_update_inode(inode, data->res.fattr);
2347 static void nfs4_proc_write_setup(struct nfs_write_data *data, int how)
2349 struct rpc_message msg = {
2350 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
2351 .rpc_argp = &data->args,
2352 .rpc_resp = &data->res,
2353 .rpc_cred = data->cred,
2355 struct inode *inode = data->inode;
2356 struct nfs_server *server = NFS_SERVER(inode);
2359 if (how & FLUSH_STABLE) {
2360 if (!NFS_I(inode)->ncommit)
2361 stable = NFS_FILE_SYNC;
2363 stable = NFS_DATA_SYNC;
2365 stable = NFS_UNSTABLE;
2366 data->args.stable = stable;
2367 data->args.bitmask = server->attr_bitmask;
2368 data->res.server = server;
2370 data->timestamp = jiffies;
2372 /* Finalize the task. */
2373 rpc_call_setup(&data->task, &msg, 0);
2376 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
2378 struct inode *inode = data->inode;
2380 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2381 rpc_restart_call(task);
2384 if (task->tk_status >= 0)
2385 nfs_post_op_update_inode(inode, data->res.fattr);
2389 static void nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
2391 struct rpc_message msg = {
2392 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
2393 .rpc_argp = &data->args,
2394 .rpc_resp = &data->res,
2395 .rpc_cred = data->cred,
2397 struct nfs_server *server = NFS_SERVER(data->inode);
2399 data->args.bitmask = server->attr_bitmask;
2400 data->res.server = server;
2402 rpc_call_setup(&data->task, &msg, 0);
2406 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2407 * standalone procedure for queueing an asynchronous RENEW.
2409 static void nfs4_renew_done(struct rpc_task *task, void *data)
2411 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
2412 unsigned long timestamp = (unsigned long)data;
2414 if (task->tk_status < 0) {
2415 switch (task->tk_status) {
2416 case -NFS4ERR_STALE_CLIENTID:
2417 case -NFS4ERR_EXPIRED:
2418 case -NFS4ERR_CB_PATH_DOWN:
2419 nfs4_schedule_state_recovery(clp);
2423 spin_lock(&clp->cl_lock);
2424 if (time_before(clp->cl_last_renewal,timestamp))
2425 clp->cl_last_renewal = timestamp;
2426 spin_unlock(&clp->cl_lock);
2429 static const struct rpc_call_ops nfs4_renew_ops = {
2430 .rpc_call_done = nfs4_renew_done,
2433 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
2435 struct rpc_message msg = {
2436 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2441 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
2442 &nfs4_renew_ops, (void *)jiffies);
2445 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
2447 struct rpc_message msg = {
2448 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2452 unsigned long now = jiffies;
2455 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2458 spin_lock(&clp->cl_lock);
2459 if (time_before(clp->cl_last_renewal,now))
2460 clp->cl_last_renewal = now;
2461 spin_unlock(&clp->cl_lock);
2465 static inline int nfs4_server_supports_acls(struct nfs_server *server)
2467 return (server->caps & NFS_CAP_ACLS)
2468 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2469 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2472 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2473 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2476 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2478 static void buf_to_pages(const void *buf, size_t buflen,
2479 struct page **pages, unsigned int *pgbase)
2481 const void *p = buf;
2483 *pgbase = offset_in_page(buf);
2485 while (p < buf + buflen) {
2486 *(pages++) = virt_to_page(p);
2487 p += PAGE_CACHE_SIZE;
2491 struct nfs4_cached_acl {
2497 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2499 struct nfs_inode *nfsi = NFS_I(inode);
2501 spin_lock(&inode->i_lock);
2502 kfree(nfsi->nfs4_acl);
2503 nfsi->nfs4_acl = acl;
2504 spin_unlock(&inode->i_lock);
2507 static void nfs4_zap_acl_attr(struct inode *inode)
2509 nfs4_set_cached_acl(inode, NULL);
2512 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2514 struct nfs_inode *nfsi = NFS_I(inode);
2515 struct nfs4_cached_acl *acl;
2518 spin_lock(&inode->i_lock);
2519 acl = nfsi->nfs4_acl;
2522 if (buf == NULL) /* user is just asking for length */
2524 if (acl->cached == 0)
2526 ret = -ERANGE; /* see getxattr(2) man page */
2527 if (acl->len > buflen)
2529 memcpy(buf, acl->data, acl->len);
2533 spin_unlock(&inode->i_lock);
2537 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2539 struct nfs4_cached_acl *acl;
2541 if (buf && acl_len <= PAGE_SIZE) {
2542 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2546 memcpy(acl->data, buf, acl_len);
2548 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2555 nfs4_set_cached_acl(inode, acl);
2558 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2560 struct page *pages[NFS4ACL_MAXPAGES];
2561 struct nfs_getaclargs args = {
2562 .fh = NFS_FH(inode),
2566 size_t resp_len = buflen;
2568 struct rpc_message msg = {
2569 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2571 .rpc_resp = &resp_len,
2573 struct page *localpage = NULL;
2576 if (buflen < PAGE_SIZE) {
2577 /* As long as we're doing a round trip to the server anyway,
2578 * let's be prepared for a page of acl data. */
2579 localpage = alloc_page(GFP_KERNEL);
2580 resp_buf = page_address(localpage);
2581 if (localpage == NULL)
2583 args.acl_pages[0] = localpage;
2584 args.acl_pgbase = 0;
2585 resp_len = args.acl_len = PAGE_SIZE;
2588 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2590 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2593 if (resp_len > args.acl_len)
2594 nfs4_write_cached_acl(inode, NULL, resp_len);
2596 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2599 if (resp_len > buflen)
2602 memcpy(buf, resp_buf, resp_len);
2607 __free_page(localpage);
2611 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2613 struct nfs4_exception exception = { };
2616 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2619 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2620 } while (exception.retry);
2624 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2626 struct nfs_server *server = NFS_SERVER(inode);
2629 if (!nfs4_server_supports_acls(server))
2631 ret = nfs_revalidate_inode(server, inode);
2634 ret = nfs4_read_cached_acl(inode, buf, buflen);
2637 return nfs4_get_acl_uncached(inode, buf, buflen);
2640 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2642 struct nfs_server *server = NFS_SERVER(inode);
2643 struct page *pages[NFS4ACL_MAXPAGES];
2644 struct nfs_setaclargs arg = {
2645 .fh = NFS_FH(inode),
2649 struct rpc_message msg = {
2650 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2656 if (!nfs4_server_supports_acls(server))
2658 nfs_inode_return_delegation(inode);
2659 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
2660 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2661 nfs_zap_caches(inode);
2665 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2667 struct nfs4_exception exception = { };
2670 err = nfs4_handle_exception(NFS_SERVER(inode),
2671 __nfs4_proc_set_acl(inode, buf, buflen),
2673 } while (exception.retry);
2678 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
2680 struct nfs_client *clp = server->nfs_client;
2682 if (!clp || task->tk_status >= 0)
2684 switch(task->tk_status) {
2685 case -NFS4ERR_STALE_CLIENTID:
2686 case -NFS4ERR_STALE_STATEID:
2687 case -NFS4ERR_EXPIRED:
2688 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2689 nfs4_schedule_state_recovery(clp);
2690 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
2691 rpc_wake_up_task(task);
2692 task->tk_status = 0;
2694 case -NFS4ERR_DELAY:
2695 nfs_inc_server_stats((struct nfs_server *) server,
2697 case -NFS4ERR_GRACE:
2698 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2699 task->tk_status = 0;
2701 case -NFS4ERR_OLD_STATEID:
2702 task->tk_status = 0;
2705 task->tk_status = nfs4_map_errors(task->tk_status);
2709 static int nfs4_wait_bit_interruptible(void *word)
2711 if (signal_pending(current))
2712 return -ERESTARTSYS;
2717 static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
2724 rwsem_acquire(&clp->cl_sem.dep_map, 0, 0, _RET_IP_);
2726 rpc_clnt_sigmask(clnt, &oldset);
2727 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
2728 nfs4_wait_bit_interruptible,
2729 TASK_INTERRUPTIBLE);
2730 rpc_clnt_sigunmask(clnt, &oldset);
2732 rwsem_release(&clp->cl_sem.dep_map, 1, _RET_IP_);
2736 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2744 *timeout = NFS4_POLL_RETRY_MIN;
2745 if (*timeout > NFS4_POLL_RETRY_MAX)
2746 *timeout = NFS4_POLL_RETRY_MAX;
2747 rpc_clnt_sigmask(clnt, &oldset);
2748 if (clnt->cl_intr) {
2749 schedule_timeout_interruptible(*timeout);
2753 schedule_timeout_uninterruptible(*timeout);
2754 rpc_clnt_sigunmask(clnt, &oldset);
2759 /* This is the error handling routine for processes that are allowed
2762 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
2764 struct nfs_client *clp = server->nfs_client;
2765 int ret = errorcode;
2767 exception->retry = 0;
2771 case -NFS4ERR_STALE_CLIENTID:
2772 case -NFS4ERR_STALE_STATEID:
2773 case -NFS4ERR_EXPIRED:
2774 nfs4_schedule_state_recovery(clp);
2775 ret = nfs4_wait_clnt_recover(server->client, clp);
2777 exception->retry = 1;
2779 case -NFS4ERR_FILE_OPEN:
2780 case -NFS4ERR_GRACE:
2781 case -NFS4ERR_DELAY:
2782 ret = nfs4_delay(server->client, &exception->timeout);
2785 case -NFS4ERR_OLD_STATEID:
2786 exception->retry = 1;
2788 /* We failed to handle the error */
2789 return nfs4_map_errors(ret);
2792 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
2794 nfs4_verifier sc_verifier;
2795 struct nfs4_setclientid setclientid = {
2796 .sc_verifier = &sc_verifier,
2799 struct rpc_message msg = {
2800 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2801 .rpc_argp = &setclientid,
2809 p = (__be32*)sc_verifier.data;
2810 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2811 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2814 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2815 sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u",
2816 clp->cl_ipaddr, NIPQUAD(clp->cl_addr.sin_addr),
2817 cred->cr_ops->cr_name,
2818 clp->cl_id_uniquifier);
2819 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2820 sizeof(setclientid.sc_netid), "tcp");
2821 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2822 sizeof(setclientid.sc_uaddr), "%s.%d.%d",
2823 clp->cl_ipaddr, port >> 8, port & 255);
2825 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2826 if (status != -NFS4ERR_CLID_INUSE)
2831 ssleep(clp->cl_lease_time + 1);
2833 if (++clp->cl_id_uniquifier == 0)
2839 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
2841 struct nfs_fsinfo fsinfo;
2842 struct rpc_message msg = {
2843 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2845 .rpc_resp = &fsinfo,
2852 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2854 spin_lock(&clp->cl_lock);
2855 clp->cl_lease_time = fsinfo.lease_time * HZ;
2856 clp->cl_last_renewal = now;
2857 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
2858 spin_unlock(&clp->cl_lock);
2863 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
2868 err = _nfs4_proc_setclientid_confirm(clp, cred);
2872 case -NFS4ERR_RESOURCE:
2873 /* The IBM lawyers misread another document! */
2874 case -NFS4ERR_DELAY:
2875 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2881 struct nfs4_delegreturndata {
2882 struct nfs4_delegreturnargs args;
2883 struct nfs4_delegreturnres res;
2885 nfs4_stateid stateid;
2886 struct rpc_cred *cred;
2887 unsigned long timestamp;
2888 struct nfs_fattr fattr;
2892 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata)
2894 struct nfs4_delegreturndata *data = calldata;
2895 struct rpc_message msg = {
2896 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
2897 .rpc_argp = &data->args,
2898 .rpc_resp = &data->res,
2899 .rpc_cred = data->cred,
2901 nfs_fattr_init(data->res.fattr);
2902 rpc_call_setup(task, &msg, 0);
2905 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
2907 struct nfs4_delegreturndata *data = calldata;
2908 data->rpc_status = task->tk_status;
2909 if (data->rpc_status == 0)
2910 renew_lease(data->res.server, data->timestamp);
2913 static void nfs4_delegreturn_release(void *calldata)
2915 struct nfs4_delegreturndata *data = calldata;
2917 put_rpccred(data->cred);
2921 static const struct rpc_call_ops nfs4_delegreturn_ops = {
2922 .rpc_call_prepare = nfs4_delegreturn_prepare,
2923 .rpc_call_done = nfs4_delegreturn_done,
2924 .rpc_release = nfs4_delegreturn_release,
2927 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2929 struct nfs4_delegreturndata *data;
2930 struct nfs_server *server = NFS_SERVER(inode);
2931 struct rpc_task *task;
2934 data = kmalloc(sizeof(*data), GFP_KERNEL);
2937 data->args.fhandle = &data->fh;
2938 data->args.stateid = &data->stateid;
2939 data->args.bitmask = server->attr_bitmask;
2940 nfs_copy_fh(&data->fh, NFS_FH(inode));
2941 memcpy(&data->stateid, stateid, sizeof(data->stateid));
2942 data->res.fattr = &data->fattr;
2943 data->res.server = server;
2944 data->cred = get_rpccred(cred);
2945 data->timestamp = jiffies;
2946 data->rpc_status = 0;
2948 task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data);
2950 return PTR_ERR(task);
2951 status = nfs4_wait_for_completion_rpc_task(task);
2953 status = data->rpc_status;
2955 nfs_post_op_update_inode(inode, &data->fattr);
2961 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2963 struct nfs_server *server = NFS_SERVER(inode);
2964 struct nfs4_exception exception = { };
2967 err = _nfs4_proc_delegreturn(inode, cred, stateid);
2969 case -NFS4ERR_STALE_STATEID:
2970 case -NFS4ERR_EXPIRED:
2974 err = nfs4_handle_exception(server, err, &exception);
2975 } while (exception.retry);
2979 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
2980 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
2983 * sleep, with exponential backoff, and retry the LOCK operation.
2985 static unsigned long
2986 nfs4_set_lock_task_retry(unsigned long timeout)
2988 schedule_timeout_interruptible(timeout);
2990 if (timeout > NFS4_LOCK_MAXTIMEOUT)
2991 return NFS4_LOCK_MAXTIMEOUT;
2995 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
2997 struct inode *inode = state->inode;
2998 struct nfs_server *server = NFS_SERVER(inode);
2999 struct nfs_client *clp = server->nfs_client;
3000 struct nfs_lockt_args arg = {
3001 .fh = NFS_FH(inode),
3004 struct nfs_lockt_res res = {
3007 struct rpc_message msg = {
3008 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3011 .rpc_cred = state->owner->so_cred,
3013 struct nfs4_lock_state *lsp;
3016 down_read(&clp->cl_sem);
3017 arg.lock_owner.clientid = clp->cl_clientid;
3018 status = nfs4_set_lock_state(state, request);
3021 lsp = request->fl_u.nfs4_fl.owner;
3022 arg.lock_owner.id = lsp->ls_id;
3023 status = rpc_call_sync(server->client, &msg, 0);
3026 request->fl_type = F_UNLCK;
3028 case -NFS4ERR_DENIED:
3031 request->fl_ops->fl_release_private(request);
3033 up_read(&clp->cl_sem);
3037 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3039 struct nfs4_exception exception = { };
3043 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3044 _nfs4_proc_getlk(state, cmd, request),
3046 } while (exception.retry);
3050 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3053 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3055 res = posix_lock_file_wait(file, fl);
3058 res = flock_lock_file_wait(file, fl);
3066 struct nfs4_unlockdata {
3067 struct nfs_locku_args arg;
3068 struct nfs_locku_res res;
3069 struct nfs4_lock_state *lsp;
3070 struct nfs_open_context *ctx;
3071 struct file_lock fl;
3072 const struct nfs_server *server;
3073 unsigned long timestamp;
3076 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3077 struct nfs_open_context *ctx,
3078 struct nfs4_lock_state *lsp,
3079 struct nfs_seqid *seqid)
3081 struct nfs4_unlockdata *p;
3082 struct inode *inode = lsp->ls_state->inode;
3084 p = kmalloc(sizeof(*p), GFP_KERNEL);
3087 p->arg.fh = NFS_FH(inode);
3089 p->arg.seqid = seqid;
3090 p->arg.stateid = &lsp->ls_stateid;
3092 atomic_inc(&lsp->ls_count);
3093 /* Ensure we don't close file until we're done freeing locks! */
3094 p->ctx = get_nfs_open_context(ctx);
3095 memcpy(&p->fl, fl, sizeof(p->fl));
3096 p->server = NFS_SERVER(inode);
3100 static void nfs4_locku_release_calldata(void *data)
3102 struct nfs4_unlockdata *calldata = data;
3103 nfs_free_seqid(calldata->arg.seqid);
3104 nfs4_put_lock_state(calldata->lsp);
3105 put_nfs_open_context(calldata->ctx);
3109 static void nfs4_locku_done(struct rpc_task *task, void *data)
3111 struct nfs4_unlockdata *calldata = data;
3113 if (RPC_ASSASSINATED(task))
3115 nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid);
3116 switch (task->tk_status) {
3118 memcpy(calldata->lsp->ls_stateid.data,
3119 calldata->res.stateid.data,
3120 sizeof(calldata->lsp->ls_stateid.data));
3121 renew_lease(calldata->server, calldata->timestamp);
3123 case -NFS4ERR_STALE_STATEID:
3124 case -NFS4ERR_EXPIRED:
3127 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN)
3128 rpc_restart_call(task);
3132 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3134 struct nfs4_unlockdata *calldata = data;
3135 struct rpc_message msg = {
3136 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3137 .rpc_argp = &calldata->arg,
3138 .rpc_resp = &calldata->res,
3139 .rpc_cred = calldata->lsp->ls_state->owner->so_cred,
3142 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3144 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3145 /* Note: exit _without_ running nfs4_locku_done */
3146 task->tk_action = NULL;
3149 calldata->timestamp = jiffies;
3150 rpc_call_setup(task, &msg, 0);
3153 static const struct rpc_call_ops nfs4_locku_ops = {
3154 .rpc_call_prepare = nfs4_locku_prepare,
3155 .rpc_call_done = nfs4_locku_done,
3156 .rpc_release = nfs4_locku_release_calldata,
3159 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3160 struct nfs_open_context *ctx,
3161 struct nfs4_lock_state *lsp,
3162 struct nfs_seqid *seqid)
3164 struct nfs4_unlockdata *data;
3166 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3168 nfs_free_seqid(seqid);
3169 return ERR_PTR(-ENOMEM);
3172 return rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data);
3175 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3177 struct nfs_seqid *seqid;
3178 struct nfs4_lock_state *lsp;
3179 struct rpc_task *task;
3182 status = nfs4_set_lock_state(state, request);
3183 /* Unlock _before_ we do the RPC call */
3184 request->fl_flags |= FL_EXISTS;
3185 if (do_vfs_lock(request->fl_file, request) == -ENOENT)
3189 /* Is this a delegated lock? */
3190 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3192 lsp = request->fl_u.nfs4_fl.owner;
3193 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3197 task = nfs4_do_unlck(request, request->fl_file->private_data, lsp, seqid);
3198 status = PTR_ERR(task);
3201 status = nfs4_wait_for_completion_rpc_task(task);
3207 struct nfs4_lockdata {
3208 struct nfs_lock_args arg;
3209 struct nfs_lock_res res;
3210 struct nfs4_lock_state *lsp;
3211 struct nfs_open_context *ctx;
3212 struct file_lock fl;
3213 unsigned long timestamp;
3218 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3219 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3221 struct nfs4_lockdata *p;
3222 struct inode *inode = lsp->ls_state->inode;
3223 struct nfs_server *server = NFS_SERVER(inode);
3225 p = kzalloc(sizeof(*p), GFP_KERNEL);
3229 p->arg.fh = NFS_FH(inode);
3231 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3232 if (p->arg.lock_seqid == NULL)
3234 p->arg.lock_stateid = &lsp->ls_stateid;
3235 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
3236 p->arg.lock_owner.id = lsp->ls_id;
3238 atomic_inc(&lsp->ls_count);
3239 p->ctx = get_nfs_open_context(ctx);
3240 memcpy(&p->fl, fl, sizeof(p->fl));
3247 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3249 struct nfs4_lockdata *data = calldata;
3250 struct nfs4_state *state = data->lsp->ls_state;
3251 struct nfs4_state_owner *sp = state->owner;
3252 struct rpc_message msg = {
3253 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3254 .rpc_argp = &data->arg,
3255 .rpc_resp = &data->res,
3256 .rpc_cred = sp->so_cred,
3259 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3261 dprintk("%s: begin!\n", __FUNCTION__);
3262 /* Do we need to do an open_to_lock_owner? */
3263 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3264 data->arg.open_seqid = nfs_alloc_seqid(&sp->so_seqid);
3265 if (data->arg.open_seqid == NULL) {
3266 data->rpc_status = -ENOMEM;
3267 task->tk_action = NULL;
3270 data->arg.open_stateid = &state->stateid;
3271 data->arg.new_lock_owner = 1;
3273 data->timestamp = jiffies;
3274 rpc_call_setup(task, &msg, 0);
3276 dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
3279 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3281 struct nfs4_lockdata *data = calldata;
3283 dprintk("%s: begin!\n", __FUNCTION__);
3285 data->rpc_status = task->tk_status;
3286 if (RPC_ASSASSINATED(task))
3288 if (data->arg.new_lock_owner != 0) {
3289 nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid);
3290 if (data->rpc_status == 0)
3291 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3295 if (data->rpc_status == 0) {
3296 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3297 sizeof(data->lsp->ls_stateid.data));
3298 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3299 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
3301 nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
3303 dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
3306 static void nfs4_lock_release(void *calldata)
3308 struct nfs4_lockdata *data = calldata;
3310 dprintk("%s: begin!\n", __FUNCTION__);
3311 if (data->arg.open_seqid != NULL)
3312 nfs_free_seqid(data->arg.open_seqid);
3313 if (data->cancelled != 0) {
3314 struct rpc_task *task;
3315 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3316 data->arg.lock_seqid);
3319 dprintk("%s: cancelling lock!\n", __FUNCTION__);
3321 nfs_free_seqid(data->arg.lock_seqid);
3322 nfs4_put_lock_state(data->lsp);
3323 put_nfs_open_context(data->ctx);
3325 dprintk("%s: done!\n", __FUNCTION__);
3328 static const struct rpc_call_ops nfs4_lock_ops = {
3329 .rpc_call_prepare = nfs4_lock_prepare,
3330 .rpc_call_done = nfs4_lock_done,
3331 .rpc_release = nfs4_lock_release,
3334 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3336 struct nfs4_lockdata *data;
3337 struct rpc_task *task;
3340 dprintk("%s: begin!\n", __FUNCTION__);
3341 data = nfs4_alloc_lockdata(fl, fl->fl_file->private_data,
3342 fl->fl_u.nfs4_fl.owner);
3346 data->arg.block = 1;
3348 data->arg.reclaim = 1;
3349 task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC,
3350 &nfs4_lock_ops, data);
3352 return PTR_ERR(task);
3353 ret = nfs4_wait_for_completion_rpc_task(task);
3355 ret = data->rpc_status;
3356 if (ret == -NFS4ERR_DENIED)
3359 data->cancelled = 1;
3361 dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret);
3365 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3367 struct nfs_server *server = NFS_SERVER(state->inode);
3368 struct nfs4_exception exception = { };
3372 /* Cache the lock if possible... */
3373 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3375 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3376 if (err != -NFS4ERR_DELAY)
3378 nfs4_handle_exception(server, err, &exception);
3379 } while (exception.retry);
3383 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3385 struct nfs_server *server = NFS_SERVER(state->inode);
3386 struct nfs4_exception exception = { };
3389 err = nfs4_set_lock_state(state, request);
3393 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3395 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3396 if (err != -NFS4ERR_DELAY)
3398 nfs4_handle_exception(server, err, &exception);
3399 } while (exception.retry);
3403 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3405 struct nfs_client *clp = state->owner->so_client;
3406 unsigned char fl_flags = request->fl_flags;
3409 /* Is this a delegated open? */
3410 status = nfs4_set_lock_state(state, request);
3413 request->fl_flags |= FL_ACCESS;
3414 status = do_vfs_lock(request->fl_file, request);
3417 down_read(&clp->cl_sem);
3418 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3419 struct nfs_inode *nfsi = NFS_I(state->inode);
3420 /* Yes: cache locks! */
3421 down_read(&nfsi->rwsem);
3422 /* ...but avoid races with delegation recall... */
3423 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3424 request->fl_flags = fl_flags & ~FL_SLEEP;
3425 status = do_vfs_lock(request->fl_file, request);
3426 up_read(&nfsi->rwsem);
3429 up_read(&nfsi->rwsem);
3431 status = _nfs4_do_setlk(state, cmd, request, 0);
3434 /* Note: we always want to sleep here! */
3435 request->fl_flags = fl_flags | FL_SLEEP;
3436 if (do_vfs_lock(request->fl_file, request) < 0)
3437 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
3439 up_read(&clp->cl_sem);
3441 request->fl_flags = fl_flags;
3445 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3447 struct nfs4_exception exception = { };
3451 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3452 _nfs4_proc_setlk(state, cmd, request),
3454 } while (exception.retry);
3459 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3461 struct nfs_open_context *ctx;
3462 struct nfs4_state *state;
3463 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3466 /* verify open state */
3467 ctx = (struct nfs_open_context *)filp->private_data;
3470 if (request->fl_start < 0 || request->fl_end < 0)
3474 return nfs4_proc_getlk(state, F_GETLK, request);
3476 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3479 if (request->fl_type == F_UNLCK)
3480 return nfs4_proc_unlck(state, cmd, request);
3483 status = nfs4_proc_setlk(state, cmd, request);
3484 if ((status != -EAGAIN) || IS_SETLK(cmd))
3486 timeout = nfs4_set_lock_task_retry(timeout);
3487 status = -ERESTARTSYS;
3490 } while(status < 0);
3494 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3496 struct nfs_server *server = NFS_SERVER(state->inode);
3497 struct nfs4_exception exception = { };
3500 err = nfs4_set_lock_state(state, fl);
3504 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3505 if (err != -NFS4ERR_DELAY)
3507 err = nfs4_handle_exception(server, err, &exception);
3508 } while (exception.retry);
3513 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3515 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3516 size_t buflen, int flags)
3518 struct inode *inode = dentry->d_inode;
3520 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3523 if (!S_ISREG(inode->i_mode) &&
3524 (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX))
3527 return nfs4_proc_set_acl(inode, buf, buflen);
3530 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3531 * and that's what we'll do for e.g. user attributes that haven't been set.
3532 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3533 * attributes in kernel-managed attribute namespaces. */
3534 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3537 struct inode *inode = dentry->d_inode;
3539 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3542 return nfs4_proc_get_acl(inode, buf, buflen);
3545 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3547 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
3549 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3551 if (buf && buflen < len)
3554 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3558 int nfs4_proc_fs_locations(struct inode *dir, struct qstr *name,
3559 struct nfs4_fs_locations *fs_locations, struct page *page)
3561 struct nfs_server *server = NFS_SERVER(dir);
3563 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3564 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
3566 struct nfs4_fs_locations_arg args = {
3567 .dir_fh = NFS_FH(dir),
3572 struct rpc_message msg = {
3573 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3575 .rpc_resp = fs_locations,
3579 dprintk("%s: start\n", __FUNCTION__);
3580 nfs_fattr_init(&fs_locations->fattr);
3581 fs_locations->server = server;
3582 fs_locations->nlocations = 0;
3583 status = rpc_call_sync(server->client, &msg, 0);
3584 dprintk("%s: returned status = %d\n", __FUNCTION__, status);
3588 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3589 .recover_open = nfs4_open_reclaim,
3590 .recover_lock = nfs4_lock_reclaim,
3593 struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3594 .recover_open = nfs4_open_expired,
3595 .recover_lock = nfs4_lock_expired,
3598 static const struct inode_operations nfs4_file_inode_operations = {
3599 .permission = nfs_permission,
3600 .getattr = nfs_getattr,
3601 .setattr = nfs_setattr,
3602 .getxattr = nfs4_getxattr,
3603 .setxattr = nfs4_setxattr,
3604 .listxattr = nfs4_listxattr,
3607 const struct nfs_rpc_ops nfs_v4_clientops = {
3608 .version = 4, /* protocol version */
3609 .dentry_ops = &nfs4_dentry_operations,
3610 .dir_inode_ops = &nfs4_dir_inode_operations,
3611 .file_inode_ops = &nfs4_file_inode_operations,
3612 .getroot = nfs4_proc_get_root,
3613 .getattr = nfs4_proc_getattr,
3614 .setattr = nfs4_proc_setattr,
3615 .lookupfh = nfs4_proc_lookupfh,
3616 .lookup = nfs4_proc_lookup,
3617 .access = nfs4_proc_access,
3618 .readlink = nfs4_proc_readlink,
3619 .create = nfs4_proc_create,
3620 .remove = nfs4_proc_remove,
3621 .unlink_setup = nfs4_proc_unlink_setup,
3622 .unlink_done = nfs4_proc_unlink_done,
3623 .rename = nfs4_proc_rename,
3624 .link = nfs4_proc_link,
3625 .symlink = nfs4_proc_symlink,
3626 .mkdir = nfs4_proc_mkdir,
3627 .rmdir = nfs4_proc_remove,
3628 .readdir = nfs4_proc_readdir,
3629 .mknod = nfs4_proc_mknod,
3630 .statfs = nfs4_proc_statfs,
3631 .fsinfo = nfs4_proc_fsinfo,
3632 .pathconf = nfs4_proc_pathconf,
3633 .set_capabilities = nfs4_server_capabilities,
3634 .decode_dirent = nfs4_decode_dirent,
3635 .read_setup = nfs4_proc_read_setup,
3636 .read_done = nfs4_read_done,
3637 .write_setup = nfs4_proc_write_setup,
3638 .write_done = nfs4_write_done,
3639 .commit_setup = nfs4_proc_commit_setup,
3640 .commit_done = nfs4_commit_done,
3641 .file_open = nfs_open,
3642 .file_release = nfs_release,
3643 .lock = nfs4_proc_lock,
3644 .clear_acl_cache = nfs4_zap_acl_attr,