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 (1*HZ)
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, u32 *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 = (u32 *)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;
224 struct dentry *dentry;
226 struct nfs4_state_owner *owner;
228 unsigned long timestamp;
233 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
234 struct nfs4_state_owner *sp, int flags,
235 const struct iattr *attrs)
237 struct dentry *parent = dget_parent(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->dentry = dget(dentry);
252 atomic_inc(&sp->so_count);
253 p->o_arg.fh = NFS_FH(dir);
254 p->o_arg.open_flags = flags,
255 p->o_arg.clientid = server->nfs_client->cl_clientid;
256 p->o_arg.id = sp->so_id;
257 p->o_arg.name = &dentry->d_name;
258 p->o_arg.server = server;
259 p->o_arg.bitmask = server->attr_bitmask;
260 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
261 p->o_res.f_attr = &p->f_attr;
262 p->o_res.dir_attr = &p->dir_attr;
263 p->o_res.server = server;
264 nfs_fattr_init(&p->f_attr);
265 nfs_fattr_init(&p->dir_attr);
266 if (flags & O_EXCL) {
267 u32 *s = (u32 *) p->o_arg.u.verifier.data;
270 } else if (flags & O_CREAT) {
271 p->o_arg.u.attrs = &p->attrs;
272 memcpy(&p->attrs, attrs, sizeof(p->attrs));
274 p->c_arg.fh = &p->o_res.fh;
275 p->c_arg.stateid = &p->o_res.stateid;
276 p->c_arg.seqid = p->o_arg.seqid;
285 static void nfs4_opendata_free(struct nfs4_opendata *p)
287 if (p != NULL && atomic_dec_and_test(&p->count)) {
288 nfs_free_seqid(p->o_arg.seqid);
289 nfs4_put_state_owner(p->owner);
296 /* Helper for asynchronous RPC calls */
297 static int nfs4_call_async(struct rpc_clnt *clnt,
298 const struct rpc_call_ops *tk_ops, void *calldata)
300 struct rpc_task *task;
302 if (!(task = rpc_new_task(clnt, RPC_TASK_ASYNC, tk_ops, calldata)))
308 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
313 rpc_clnt_sigmask(task->tk_client, &oldset);
314 ret = rpc_wait_for_completion_task(task);
315 rpc_clnt_sigunmask(task->tk_client, &oldset);
319 static inline void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
321 switch (open_flags) {
328 case FMODE_READ|FMODE_WRITE:
333 static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
335 struct inode *inode = state->inode;
337 open_flags &= (FMODE_READ|FMODE_WRITE);
338 /* Protect against nfs4_find_state_byowner() */
339 spin_lock(&state->owner->so_lock);
340 spin_lock(&inode->i_lock);
341 memcpy(&state->stateid, stateid, sizeof(state->stateid));
342 update_open_stateflags(state, open_flags);
343 nfs4_state_set_mode_locked(state, state->state | open_flags);
344 spin_unlock(&inode->i_lock);
345 spin_unlock(&state->owner->so_lock);
348 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
351 struct nfs4_state *state = NULL;
353 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
355 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
358 state = nfs4_get_open_state(inode, data->owner);
361 update_open_stateid(state, &data->o_res.stateid, data->o_arg.open_flags);
368 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
370 struct nfs_inode *nfsi = NFS_I(state->inode);
371 struct nfs_open_context *ctx;
373 spin_lock(&state->inode->i_lock);
374 list_for_each_entry(ctx, &nfsi->open_files, list) {
375 if (ctx->state != state)
377 get_nfs_open_context(ctx);
378 spin_unlock(&state->inode->i_lock);
381 spin_unlock(&state->inode->i_lock);
382 return ERR_PTR(-ENOENT);
385 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, nfs4_stateid *stateid)
389 opendata->o_arg.open_flags = openflags;
390 ret = _nfs4_proc_open(opendata);
393 memcpy(stateid->data, opendata->o_res.stateid.data,
394 sizeof(stateid->data));
398 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
400 nfs4_stateid stateid;
401 struct nfs4_state *newstate;
406 /* memory barrier prior to reading state->n_* */
408 if (state->n_rdwr != 0) {
409 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &stateid);
412 mode |= FMODE_READ|FMODE_WRITE;
413 if (opendata->o_res.delegation_type != 0)
414 delegation = opendata->o_res.delegation_type;
417 if (state->n_wronly != 0) {
418 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &stateid);
422 if (opendata->o_res.delegation_type != 0)
423 delegation = opendata->o_res.delegation_type;
426 if (state->n_rdonly != 0) {
427 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &stateid);
432 clear_bit(NFS_DELEGATED_STATE, &state->flags);
435 if (opendata->o_res.delegation_type == 0)
436 opendata->o_res.delegation_type = delegation;
437 opendata->o_arg.open_flags |= mode;
438 newstate = nfs4_opendata_to_nfs4_state(opendata);
439 if (newstate != NULL) {
440 if (opendata->o_res.delegation_type != 0) {
441 struct nfs_inode *nfsi = NFS_I(newstate->inode);
442 int delegation_flags = 0;
443 if (nfsi->delegation)
444 delegation_flags = nfsi->delegation->flags;
445 if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
446 nfs_inode_set_delegation(newstate->inode,
447 opendata->owner->so_cred,
450 nfs_inode_reclaim_delegation(newstate->inode,
451 opendata->owner->so_cred,
454 nfs4_close_state(newstate, opendata->o_arg.open_flags);
456 if (newstate != state)
463 * reclaim state on the server after a reboot.
465 static int _nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
467 struct nfs_delegation *delegation = NFS_I(state->inode)->delegation;
468 struct nfs4_opendata *opendata;
469 int delegation_type = 0;
472 if (delegation != NULL) {
473 if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
474 memcpy(&state->stateid, &delegation->stateid,
475 sizeof(state->stateid));
476 set_bit(NFS_DELEGATED_STATE, &state->flags);
479 delegation_type = delegation->type;
481 opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL);
482 if (opendata == NULL)
484 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
485 opendata->o_arg.fh = NFS_FH(state->inode);
486 nfs_copy_fh(&opendata->o_res.fh, opendata->o_arg.fh);
487 opendata->o_arg.u.delegation_type = delegation_type;
488 status = nfs4_open_recover(opendata, state);
489 nfs4_opendata_free(opendata);
493 static int nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
495 struct nfs_server *server = NFS_SERVER(state->inode);
496 struct nfs4_exception exception = { };
499 err = _nfs4_do_open_reclaim(sp, state, dentry);
500 if (err != -NFS4ERR_DELAY)
502 nfs4_handle_exception(server, err, &exception);
503 } while (exception.retry);
507 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
509 struct nfs_open_context *ctx;
512 ctx = nfs4_state_find_open_context(state);
515 ret = nfs4_do_open_reclaim(sp, state, ctx->dentry);
516 put_nfs_open_context(ctx);
520 static int _nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
522 struct nfs4_state_owner *sp = state->owner;
523 struct nfs4_opendata *opendata;
526 if (!test_bit(NFS_DELEGATED_STATE, &state->flags))
528 opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL);
529 if (opendata == NULL)
531 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
532 memcpy(opendata->o_arg.u.delegation.data, state->stateid.data,
533 sizeof(opendata->o_arg.u.delegation.data));
534 ret = nfs4_open_recover(opendata, state);
535 nfs4_opendata_free(opendata);
539 int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
541 struct nfs4_exception exception = { };
542 struct nfs_server *server = NFS_SERVER(dentry->d_inode);
545 err = _nfs4_open_delegation_recall(dentry, state);
549 case -NFS4ERR_STALE_CLIENTID:
550 case -NFS4ERR_STALE_STATEID:
551 case -NFS4ERR_EXPIRED:
552 /* Don't recall a delegation if it was lost */
553 nfs4_schedule_state_recovery(server->nfs_client);
556 err = nfs4_handle_exception(server, err, &exception);
557 } while (exception.retry);
561 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
563 struct nfs4_opendata *data = calldata;
564 struct rpc_message msg = {
565 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
566 .rpc_argp = &data->c_arg,
567 .rpc_resp = &data->c_res,
568 .rpc_cred = data->owner->so_cred,
570 data->timestamp = jiffies;
571 rpc_call_setup(task, &msg, 0);
574 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
576 struct nfs4_opendata *data = calldata;
578 data->rpc_status = task->tk_status;
579 if (RPC_ASSASSINATED(task))
581 if (data->rpc_status == 0) {
582 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
583 sizeof(data->o_res.stateid.data));
584 renew_lease(data->o_res.server, data->timestamp);
586 nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
587 nfs_confirm_seqid(&data->owner->so_seqid, data->rpc_status);
590 static void nfs4_open_confirm_release(void *calldata)
592 struct nfs4_opendata *data = calldata;
593 struct nfs4_state *state = NULL;
595 /* If this request hasn't been cancelled, do nothing */
596 if (data->cancelled == 0)
598 /* In case of error, no cleanup! */
599 if (data->rpc_status != 0)
601 nfs_confirm_seqid(&data->owner->so_seqid, 0);
602 state = nfs4_opendata_to_nfs4_state(data);
604 nfs4_close_state(state, data->o_arg.open_flags);
606 nfs4_opendata_free(data);
609 static const struct rpc_call_ops nfs4_open_confirm_ops = {
610 .rpc_call_prepare = nfs4_open_confirm_prepare,
611 .rpc_call_done = nfs4_open_confirm_done,
612 .rpc_release = nfs4_open_confirm_release,
616 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
618 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
620 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
621 struct rpc_task *task;
624 atomic_inc(&data->count);
626 * If rpc_run_task() ends up calling ->rpc_release(), we
627 * want to ensure that it takes the 'error' code path.
629 data->rpc_status = -ENOMEM;
630 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data);
632 return PTR_ERR(task);
633 status = nfs4_wait_for_completion_rpc_task(task);
638 status = data->rpc_status;
639 rpc_release_task(task);
643 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
645 struct nfs4_opendata *data = calldata;
646 struct nfs4_state_owner *sp = data->owner;
647 struct rpc_message msg = {
648 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
649 .rpc_argp = &data->o_arg,
650 .rpc_resp = &data->o_res,
651 .rpc_cred = sp->so_cred,
654 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
656 /* Update sequence id. */
657 data->o_arg.id = sp->so_id;
658 data->o_arg.clientid = sp->so_client->cl_clientid;
659 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
660 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
661 data->timestamp = jiffies;
662 rpc_call_setup(task, &msg, 0);
665 static void nfs4_open_done(struct rpc_task *task, void *calldata)
667 struct nfs4_opendata *data = calldata;
669 data->rpc_status = task->tk_status;
670 if (RPC_ASSASSINATED(task))
672 if (task->tk_status == 0) {
673 switch (data->o_res.f_attr->mode & S_IFMT) {
677 data->rpc_status = -ELOOP;
680 data->rpc_status = -EISDIR;
683 data->rpc_status = -ENOTDIR;
685 renew_lease(data->o_res.server, data->timestamp);
687 nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
690 static void nfs4_open_release(void *calldata)
692 struct nfs4_opendata *data = calldata;
693 struct nfs4_state *state = NULL;
695 /* If this request hasn't been cancelled, do nothing */
696 if (data->cancelled == 0)
698 /* In case of error, no cleanup! */
699 if (data->rpc_status != 0)
701 /* In case we need an open_confirm, no cleanup! */
702 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
704 nfs_confirm_seqid(&data->owner->so_seqid, 0);
705 state = nfs4_opendata_to_nfs4_state(data);
707 nfs4_close_state(state, data->o_arg.open_flags);
709 nfs4_opendata_free(data);
712 static const struct rpc_call_ops nfs4_open_ops = {
713 .rpc_call_prepare = nfs4_open_prepare,
714 .rpc_call_done = nfs4_open_done,
715 .rpc_release = nfs4_open_release,
719 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
721 static int _nfs4_proc_open(struct nfs4_opendata *data)
723 struct inode *dir = data->dir->d_inode;
724 struct nfs_server *server = NFS_SERVER(dir);
725 struct nfs_openargs *o_arg = &data->o_arg;
726 struct nfs_openres *o_res = &data->o_res;
727 struct rpc_task *task;
730 atomic_inc(&data->count);
732 * If rpc_run_task() ends up calling ->rpc_release(), we
733 * want to ensure that it takes the 'error' code path.
735 data->rpc_status = -ENOMEM;
736 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data);
738 return PTR_ERR(task);
739 status = nfs4_wait_for_completion_rpc_task(task);
744 status = data->rpc_status;
745 rpc_release_task(task);
749 if (o_arg->open_flags & O_CREAT) {
750 update_changeattr(dir, &o_res->cinfo);
751 nfs_post_op_update_inode(dir, o_res->dir_attr);
753 nfs_refresh_inode(dir, o_res->dir_attr);
754 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
755 status = _nfs4_proc_open_confirm(data);
759 nfs_confirm_seqid(&data->owner->so_seqid, 0);
760 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
761 return server->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr);
765 static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags)
767 struct nfs_access_entry cache;
771 if (openflags & FMODE_READ)
773 if (openflags & FMODE_WRITE)
775 status = nfs_access_get_cached(inode, cred, &cache);
779 /* Be clever: ask server to check for all possible rights */
780 cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ;
782 cache.jiffies = jiffies;
783 status = _nfs4_proc_access(inode, &cache);
786 nfs_access_add_cache(inode, &cache);
788 if ((cache.mask & mask) == mask)
793 int nfs4_recover_expired_lease(struct nfs_server *server)
795 struct nfs_client *clp = server->nfs_client;
797 if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
798 nfs4_schedule_state_recovery(clp);
799 return nfs4_wait_clnt_recover(server->client, clp);
804 * reclaim state on the server after a network partition.
805 * Assumes caller holds the appropriate lock
807 static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
809 struct inode *inode = state->inode;
810 struct nfs_delegation *delegation = NFS_I(inode)->delegation;
811 struct nfs4_opendata *opendata;
812 int openflags = state->state & (FMODE_READ|FMODE_WRITE);
815 if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
816 ret = _nfs4_do_access(inode, sp->so_cred, openflags);
819 memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid));
820 set_bit(NFS_DELEGATED_STATE, &state->flags);
823 opendata = nfs4_opendata_alloc(dentry, sp, openflags, NULL);
824 if (opendata == NULL)
826 ret = nfs4_open_recover(opendata, state);
827 if (ret == -ESTALE) {
828 /* Invalidate the state owner so we don't ever use it again */
829 nfs4_drop_state_owner(sp);
832 nfs4_opendata_free(opendata);
836 static inline int nfs4_do_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
838 struct nfs_server *server = NFS_SERVER(dentry->d_inode);
839 struct nfs4_exception exception = { };
843 err = _nfs4_open_expired(sp, state, dentry);
844 if (err == -NFS4ERR_DELAY)
845 nfs4_handle_exception(server, err, &exception);
846 } while (exception.retry);
850 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
852 struct nfs_open_context *ctx;
855 ctx = nfs4_state_find_open_context(state);
858 ret = nfs4_do_open_expired(sp, state, ctx->dentry);
859 put_nfs_open_context(ctx);
864 * Returns a referenced nfs4_state if there is an open delegation on the file
866 static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res)
868 struct nfs_delegation *delegation;
869 struct nfs_server *server = NFS_SERVER(inode);
870 struct nfs_client *clp = server->nfs_client;
871 struct nfs_inode *nfsi = NFS_I(inode);
872 struct nfs4_state_owner *sp = NULL;
873 struct nfs4_state *state = NULL;
874 int open_flags = flags & (FMODE_READ|FMODE_WRITE);
878 if (!(sp = nfs4_get_state_owner(server, cred))) {
879 dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__);
882 err = nfs4_recover_expired_lease(server);
884 goto out_put_state_owner;
885 /* Protect against reboot recovery - NOTE ORDER! */
886 down_read(&clp->cl_sem);
887 /* Protect against delegation recall */
888 down_read(&nfsi->rwsem);
889 delegation = NFS_I(inode)->delegation;
891 if (delegation == NULL || (delegation->type & open_flags) != open_flags)
894 state = nfs4_get_open_state(inode, sp);
899 if ((state->state & open_flags) == open_flags) {
900 spin_lock(&inode->i_lock);
901 update_open_stateflags(state, open_flags);
902 spin_unlock(&inode->i_lock);
904 } else if (state->state != 0)
905 goto out_put_open_state;
908 err = _nfs4_do_access(inode, cred, open_flags);
911 goto out_put_open_state;
912 set_bit(NFS_DELEGATED_STATE, &state->flags);
913 update_open_stateid(state, &delegation->stateid, open_flags);
915 nfs4_put_state_owner(sp);
916 up_read(&nfsi->rwsem);
917 up_read(&clp->cl_sem);
921 nfs4_put_open_state(state);
923 up_read(&nfsi->rwsem);
924 up_read(&clp->cl_sem);
926 nfs_inode_return_delegation(inode);
928 nfs4_put_state_owner(sp);
932 static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred)
934 struct nfs4_exception exception = { };
935 struct nfs4_state *res = ERR_PTR(-EIO);
939 err = _nfs4_open_delegated(inode, flags, cred, &res);
942 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode),
944 } while (exception.retry);
949 * Returns a referenced nfs4_state
951 static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
953 struct nfs4_state_owner *sp;
954 struct nfs4_state *state = NULL;
955 struct nfs_server *server = NFS_SERVER(dir);
956 struct nfs_client *clp = server->nfs_client;
957 struct nfs4_opendata *opendata;
960 /* Protect against reboot recovery conflicts */
962 if (!(sp = nfs4_get_state_owner(server, cred))) {
963 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
966 status = nfs4_recover_expired_lease(server);
968 goto err_put_state_owner;
969 down_read(&clp->cl_sem);
971 opendata = nfs4_opendata_alloc(dentry, sp, flags, sattr);
972 if (opendata == NULL)
973 goto err_release_rwsem;
975 status = _nfs4_proc_open(opendata);
977 goto err_opendata_free;
980 state = nfs4_opendata_to_nfs4_state(opendata);
982 goto err_opendata_free;
983 if (opendata->o_res.delegation_type != 0)
984 nfs_inode_set_delegation(state->inode, cred, &opendata->o_res);
985 nfs4_opendata_free(opendata);
986 nfs4_put_state_owner(sp);
987 up_read(&clp->cl_sem);
991 nfs4_opendata_free(opendata);
993 up_read(&clp->cl_sem);
995 nfs4_put_state_owner(sp);
1002 static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred)
1004 struct nfs4_exception exception = { };
1005 struct nfs4_state *res;
1009 status = _nfs4_do_open(dir, dentry, flags, sattr, cred, &res);
1012 /* NOTE: BAD_SEQID means the server and client disagree about the
1013 * book-keeping w.r.t. state-changing operations
1014 * (OPEN/CLOSE/LOCK/LOCKU...)
1015 * It is actually a sign of a bug on the client or on the server.
1017 * If we receive a BAD_SEQID error in the particular case of
1018 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1019 * have unhashed the old state_owner for us, and that we can
1020 * therefore safely retry using a new one. We should still warn
1021 * the user though...
1023 if (status == -NFS4ERR_BAD_SEQID) {
1024 printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n");
1025 exception.retry = 1;
1029 * BAD_STATEID on OPEN means that the server cancelled our
1030 * state before it received the OPEN_CONFIRM.
1031 * Recover by retrying the request as per the discussion
1032 * on Page 181 of RFC3530.
1034 if (status == -NFS4ERR_BAD_STATEID) {
1035 exception.retry = 1;
1038 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1039 status, &exception));
1040 } while (exception.retry);
1044 static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1045 struct iattr *sattr, struct nfs4_state *state)
1047 struct nfs_server *server = NFS_SERVER(inode);
1048 struct nfs_setattrargs arg = {
1049 .fh = NFS_FH(inode),
1052 .bitmask = server->attr_bitmask,
1054 struct nfs_setattrres res = {
1058 struct rpc_message msg = {
1059 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1063 unsigned long timestamp = jiffies;
1066 nfs_fattr_init(fattr);
1068 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1069 /* Use that stateid */
1070 } else if (state != NULL) {
1071 msg.rpc_cred = state->owner->so_cred;
1072 nfs4_copy_stateid(&arg.stateid, state, current->files);
1074 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1076 status = rpc_call_sync(server->client, &msg, 0);
1077 if (status == 0 && state != NULL)
1078 renew_lease(server, timestamp);
1082 static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1083 struct iattr *sattr, struct nfs4_state *state)
1085 struct nfs_server *server = NFS_SERVER(inode);
1086 struct nfs4_exception exception = { };
1089 err = nfs4_handle_exception(server,
1090 _nfs4_do_setattr(inode, fattr, sattr, state),
1092 } while (exception.retry);
1096 struct nfs4_closedata {
1097 struct inode *inode;
1098 struct nfs4_state *state;
1099 struct nfs_closeargs arg;
1100 struct nfs_closeres res;
1101 struct nfs_fattr fattr;
1102 unsigned long timestamp;
1105 static void nfs4_free_closedata(void *data)
1107 struct nfs4_closedata *calldata = data;
1108 struct nfs4_state_owner *sp = calldata->state->owner;
1110 nfs4_put_open_state(calldata->state);
1111 nfs_free_seqid(calldata->arg.seqid);
1112 nfs4_put_state_owner(sp);
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:
1136 nfs4_schedule_state_recovery(server->nfs_client);
1139 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1140 rpc_restart_call(task);
1144 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1147 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1149 struct nfs4_closedata *calldata = data;
1150 struct nfs4_state *state = calldata->state;
1151 struct rpc_message msg = {
1152 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1153 .rpc_argp = &calldata->arg,
1154 .rpc_resp = &calldata->res,
1155 .rpc_cred = state->owner->so_cred,
1157 int mode = 0, old_mode;
1159 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1161 /* Recalculate the new open mode in case someone reopened the file
1162 * while we were waiting in line to be scheduled.
1164 spin_lock(&state->owner->so_lock);
1165 spin_lock(&calldata->inode->i_lock);
1166 mode = old_mode = state->state;
1167 if (state->n_rdwr == 0) {
1168 if (state->n_rdonly == 0)
1169 mode &= ~FMODE_READ;
1170 if (state->n_wronly == 0)
1171 mode &= ~FMODE_WRITE;
1173 nfs4_state_set_mode_locked(state, mode);
1174 spin_unlock(&calldata->inode->i_lock);
1175 spin_unlock(&state->owner->so_lock);
1176 if (mode == old_mode || test_bit(NFS_DELEGATED_STATE, &state->flags)) {
1177 /* Note: exit _without_ calling nfs4_close_done */
1178 task->tk_action = NULL;
1181 nfs_fattr_init(calldata->res.fattr);
1183 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1184 calldata->arg.open_flags = mode;
1185 calldata->timestamp = jiffies;
1186 rpc_call_setup(task, &msg, 0);
1189 static const struct rpc_call_ops nfs4_close_ops = {
1190 .rpc_call_prepare = nfs4_close_prepare,
1191 .rpc_call_done = nfs4_close_done,
1192 .rpc_release = nfs4_free_closedata,
1196 * It is possible for data to be read/written from a mem-mapped file
1197 * after the sys_close call (which hits the vfs layer as a flush).
1198 * This means that we can't safely call nfsv4 close on a file until
1199 * the inode is cleared. This in turn means that we are not good
1200 * NFSv4 citizens - we do not indicate to the server to update the file's
1201 * share state even when we are done with one of the three share
1202 * stateid's in the inode.
1204 * NOTE: Caller must be holding the sp->so_owner semaphore!
1206 int nfs4_do_close(struct inode *inode, struct nfs4_state *state)
1208 struct nfs_server *server = NFS_SERVER(inode);
1209 struct nfs4_closedata *calldata;
1210 int status = -ENOMEM;
1212 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1213 if (calldata == NULL)
1215 calldata->inode = inode;
1216 calldata->state = state;
1217 calldata->arg.fh = NFS_FH(inode);
1218 calldata->arg.stateid = &state->stateid;
1219 /* Serialization for the sequence id */
1220 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
1221 if (calldata->arg.seqid == NULL)
1222 goto out_free_calldata;
1223 calldata->arg.bitmask = server->attr_bitmask;
1224 calldata->res.fattr = &calldata->fattr;
1225 calldata->res.server = server;
1227 status = nfs4_call_async(server->client, &nfs4_close_ops, calldata);
1231 nfs_free_seqid(calldata->arg.seqid);
1238 static int nfs4_intent_set_file(struct nameidata *nd, struct dentry *dentry, struct nfs4_state *state)
1242 filp = lookup_instantiate_filp(nd, dentry, NULL);
1243 if (!IS_ERR(filp)) {
1244 struct nfs_open_context *ctx;
1245 ctx = (struct nfs_open_context *)filp->private_data;
1249 nfs4_close_state(state, nd->intent.open.flags);
1250 return PTR_ERR(filp);
1254 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1257 struct rpc_cred *cred;
1258 struct nfs4_state *state;
1261 if (nd->flags & LOOKUP_CREATE) {
1262 attr.ia_mode = nd->intent.open.create_mode;
1263 attr.ia_valid = ATTR_MODE;
1264 if (!IS_POSIXACL(dir))
1265 attr.ia_mode &= ~current->fs->umask;
1268 BUG_ON(nd->intent.open.flags & O_CREAT);
1271 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1273 return (struct dentry *)cred;
1274 state = nfs4_do_open(dir, dentry, nd->intent.open.flags, &attr, cred);
1276 if (IS_ERR(state)) {
1277 if (PTR_ERR(state) == -ENOENT)
1278 d_add(dentry, NULL);
1279 return (struct dentry *)state;
1281 res = d_add_unique(dentry, igrab(state->inode));
1284 nfs4_intent_set_file(nd, dentry, state);
1289 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1291 struct rpc_cred *cred;
1292 struct nfs4_state *state;
1294 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1296 return PTR_ERR(cred);
1297 state = nfs4_open_delegated(dentry->d_inode, openflags, cred);
1299 state = nfs4_do_open(dir, dentry, openflags, NULL, cred);
1301 if (IS_ERR(state)) {
1302 switch (PTR_ERR(state)) {
1308 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1311 if (dentry->d_inode == NULL)
1316 if (state->inode == dentry->d_inode) {
1317 nfs4_intent_set_file(nd, dentry, state);
1320 nfs4_close_state(state, openflags);
1327 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1329 struct nfs4_server_caps_res res = {};
1330 struct rpc_message msg = {
1331 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1332 .rpc_argp = fhandle,
1337 status = rpc_call_sync(server->client, &msg, 0);
1339 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1340 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1341 server->caps |= NFS_CAP_ACLS;
1342 if (res.has_links != 0)
1343 server->caps |= NFS_CAP_HARDLINKS;
1344 if (res.has_symlinks != 0)
1345 server->caps |= NFS_CAP_SYMLINKS;
1346 server->acl_bitmask = res.acl_bitmask;
1351 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1353 struct nfs4_exception exception = { };
1356 err = nfs4_handle_exception(server,
1357 _nfs4_server_capabilities(server, fhandle),
1359 } while (exception.retry);
1363 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1364 struct nfs_fsinfo *info)
1366 struct nfs4_lookup_root_arg args = {
1367 .bitmask = nfs4_fattr_bitmap,
1369 struct nfs4_lookup_res res = {
1371 .fattr = info->fattr,
1374 struct rpc_message msg = {
1375 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1379 nfs_fattr_init(info->fattr);
1380 return rpc_call_sync(server->client, &msg, 0);
1383 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1384 struct nfs_fsinfo *info)
1386 struct nfs4_exception exception = { };
1389 err = nfs4_handle_exception(server,
1390 _nfs4_lookup_root(server, fhandle, info),
1392 } while (exception.retry);
1396 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
1397 struct nfs_fsinfo *info)
1399 struct nfs_fattr * fattr = info->fattr;
1402 struct nfs4_lookup_arg args = {
1405 .bitmask = nfs4_fattr_bitmap,
1407 struct nfs4_lookup_res res = {
1412 struct rpc_message msg = {
1413 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1420 * Now we do a separate LOOKUP for each component of the mount path.
1421 * The LOOKUPs are done separately so that we can conveniently
1422 * catch an ERR_WRONGSEC if it occurs along the way...
1424 status = nfs4_lookup_root(server, fhandle, info);
1428 p = server->mnt_path;
1430 struct nfs4_exception exception = { };
1437 while (*p && (*p != '/'))
1442 nfs_fattr_init(fattr);
1443 status = nfs4_handle_exception(server,
1444 rpc_call_sync(server->client, &msg, 0),
1446 } while (exception.retry);
1449 if (status == -ENOENT) {
1450 printk(KERN_NOTICE "NFS: mount path %s does not exist!\n", server->mnt_path);
1451 printk(KERN_NOTICE "NFS: suggestion: try mounting '/' instead.\n");
1456 status = nfs4_server_capabilities(server, fhandle);
1458 status = nfs4_do_fsinfo(server, fhandle, info);
1460 return nfs4_map_errors(status);
1464 * Get locations and (maybe) other attributes of a referral.
1465 * Note that we'll actually follow the referral later when
1466 * we detect fsid mismatch in inode revalidation
1468 static int nfs4_get_referral(struct inode *dir, struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
1470 int status = -ENOMEM;
1471 struct page *page = NULL;
1472 struct nfs4_fs_locations *locations = NULL;
1473 struct dentry dentry = {};
1475 page = alloc_page(GFP_KERNEL);
1478 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1479 if (locations == NULL)
1482 dentry.d_name.name = name->name;
1483 dentry.d_name.len = name->len;
1484 status = nfs4_proc_fs_locations(dir, &dentry, locations, page);
1487 /* Make sure server returned a different fsid for the referral */
1488 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
1489 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__, name->name);
1494 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1495 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1497 fattr->mode = S_IFDIR;
1498 memset(fhandle, 0, sizeof(struct nfs_fh));
1507 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1509 struct nfs4_getattr_arg args = {
1511 .bitmask = server->attr_bitmask,
1513 struct nfs4_getattr_res res = {
1517 struct rpc_message msg = {
1518 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1523 nfs_fattr_init(fattr);
1524 return rpc_call_sync(server->client, &msg, 0);
1527 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1529 struct nfs4_exception exception = { };
1532 err = nfs4_handle_exception(server,
1533 _nfs4_proc_getattr(server, fhandle, fattr),
1535 } while (exception.retry);
1540 * The file is not closed if it is opened due to the a request to change
1541 * the size of the file. The open call will not be needed once the
1542 * VFS layer lookup-intents are implemented.
1544 * Close is called when the inode is destroyed.
1545 * If we haven't opened the file for O_WRONLY, we
1546 * need to in the size_change case to obtain a stateid.
1549 * Because OPEN is always done by name in nfsv4, it is
1550 * possible that we opened a different file by the same
1551 * name. We can recognize this race condition, but we
1552 * can't do anything about it besides returning an error.
1554 * This will be fixed with VFS changes (lookup-intent).
1557 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1558 struct iattr *sattr)
1560 struct rpc_cred *cred;
1561 struct inode *inode = dentry->d_inode;
1562 struct nfs_open_context *ctx;
1563 struct nfs4_state *state = NULL;
1566 nfs_fattr_init(fattr);
1568 cred = rpcauth_lookupcred(NFS_SERVER(inode)->client->cl_auth, 0);
1570 return PTR_ERR(cred);
1572 /* Search for an existing open(O_WRITE) file */
1573 ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
1577 status = nfs4_do_setattr(inode, fattr, sattr, state);
1579 nfs_setattr_update_inode(inode, sattr);
1581 put_nfs_open_context(ctx);
1586 static int _nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1587 struct qstr *name, struct nfs_fh *fhandle,
1588 struct nfs_fattr *fattr)
1591 struct nfs4_lookup_arg args = {
1592 .bitmask = server->attr_bitmask,
1596 struct nfs4_lookup_res res = {
1601 struct rpc_message msg = {
1602 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1607 nfs_fattr_init(fattr);
1609 dprintk("NFS call lookupfh %s\n", name->name);
1610 status = rpc_call_sync(server->client, &msg, 0);
1611 dprintk("NFS reply lookupfh: %d\n", status);
1612 if (status == -NFS4ERR_MOVED)
1617 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1618 struct qstr *name, struct nfs_fh *fhandle,
1619 struct nfs_fattr *fattr)
1621 struct nfs4_exception exception = { };
1624 err = nfs4_handle_exception(server,
1625 _nfs4_proc_lookupfh(server, dirfh, name,
1628 } while (exception.retry);
1632 static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1633 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1636 struct nfs_server *server = NFS_SERVER(dir);
1637 struct nfs4_lookup_arg args = {
1638 .bitmask = server->attr_bitmask,
1639 .dir_fh = NFS_FH(dir),
1642 struct nfs4_lookup_res res = {
1647 struct rpc_message msg = {
1648 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1653 nfs_fattr_init(fattr);
1655 dprintk("NFS call lookup %s\n", name->name);
1656 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1657 if (status == -NFS4ERR_MOVED)
1658 status = nfs4_get_referral(dir, name, fattr, fhandle);
1659 dprintk("NFS reply lookup: %d\n", status);
1663 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1665 struct nfs4_exception exception = { };
1668 err = nfs4_handle_exception(NFS_SERVER(dir),
1669 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1671 } while (exception.retry);
1675 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1677 struct nfs4_accessargs args = {
1678 .fh = NFS_FH(inode),
1680 struct nfs4_accessres res = { 0 };
1681 struct rpc_message msg = {
1682 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1685 .rpc_cred = entry->cred,
1687 int mode = entry->mask;
1691 * Determine which access bits we want to ask for...
1693 if (mode & MAY_READ)
1694 args.access |= NFS4_ACCESS_READ;
1695 if (S_ISDIR(inode->i_mode)) {
1696 if (mode & MAY_WRITE)
1697 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1698 if (mode & MAY_EXEC)
1699 args.access |= NFS4_ACCESS_LOOKUP;
1701 if (mode & MAY_WRITE)
1702 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1703 if (mode & MAY_EXEC)
1704 args.access |= NFS4_ACCESS_EXECUTE;
1706 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1709 if (res.access & NFS4_ACCESS_READ)
1710 entry->mask |= MAY_READ;
1711 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1712 entry->mask |= MAY_WRITE;
1713 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1714 entry->mask |= MAY_EXEC;
1719 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1721 struct nfs4_exception exception = { };
1724 err = nfs4_handle_exception(NFS_SERVER(inode),
1725 _nfs4_proc_access(inode, entry),
1727 } while (exception.retry);
1732 * TODO: For the time being, we don't try to get any attributes
1733 * along with any of the zero-copy operations READ, READDIR,
1736 * In the case of the first three, we want to put the GETATTR
1737 * after the read-type operation -- this is because it is hard
1738 * to predict the length of a GETATTR response in v4, and thus
1739 * align the READ data correctly. This means that the GETATTR
1740 * may end up partially falling into the page cache, and we should
1741 * shift it into the 'tail' of the xdr_buf before processing.
1742 * To do this efficiently, we need to know the total length
1743 * of data received, which doesn't seem to be available outside
1746 * In the case of WRITE, we also want to put the GETATTR after
1747 * the operation -- in this case because we want to make sure
1748 * we get the post-operation mtime and size. This means that
1749 * we can't use xdr_encode_pages() as written: we need a variant
1750 * of it which would leave room in the 'tail' iovec.
1752 * Both of these changes to the XDR layer would in fact be quite
1753 * minor, but I decided to leave them for a subsequent patch.
1755 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1756 unsigned int pgbase, unsigned int pglen)
1758 struct nfs4_readlink args = {
1759 .fh = NFS_FH(inode),
1764 struct rpc_message msg = {
1765 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1770 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1773 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1774 unsigned int pgbase, unsigned int pglen)
1776 struct nfs4_exception exception = { };
1779 err = nfs4_handle_exception(NFS_SERVER(inode),
1780 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1782 } while (exception.retry);
1786 static int _nfs4_proc_read(struct nfs_read_data *rdata)
1788 int flags = rdata->flags;
1789 struct inode *inode = rdata->inode;
1790 struct nfs_fattr *fattr = rdata->res.fattr;
1791 struct nfs_server *server = NFS_SERVER(inode);
1792 struct rpc_message msg = {
1793 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
1794 .rpc_argp = &rdata->args,
1795 .rpc_resp = &rdata->res,
1796 .rpc_cred = rdata->cred,
1798 unsigned long timestamp = jiffies;
1801 dprintk("NFS call read %d @ %Ld\n", rdata->args.count,
1802 (long long) rdata->args.offset);
1804 nfs_fattr_init(fattr);
1805 status = rpc_call_sync(server->client, &msg, flags);
1807 renew_lease(server, timestamp);
1808 dprintk("NFS reply read: %d\n", status);
1812 static int nfs4_proc_read(struct nfs_read_data *rdata)
1814 struct nfs4_exception exception = { };
1817 err = nfs4_handle_exception(NFS_SERVER(rdata->inode),
1818 _nfs4_proc_read(rdata),
1820 } while (exception.retry);
1824 static int _nfs4_proc_write(struct nfs_write_data *wdata)
1826 int rpcflags = wdata->flags;
1827 struct inode *inode = wdata->inode;
1828 struct nfs_fattr *fattr = wdata->res.fattr;
1829 struct nfs_server *server = NFS_SERVER(inode);
1830 struct rpc_message msg = {
1831 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
1832 .rpc_argp = &wdata->args,
1833 .rpc_resp = &wdata->res,
1834 .rpc_cred = wdata->cred,
1838 dprintk("NFS call write %d @ %Ld\n", wdata->args.count,
1839 (long long) wdata->args.offset);
1841 wdata->args.bitmask = server->attr_bitmask;
1842 wdata->res.server = server;
1843 wdata->timestamp = jiffies;
1844 nfs_fattr_init(fattr);
1845 status = rpc_call_sync(server->client, &msg, rpcflags);
1846 dprintk("NFS reply write: %d\n", status);
1849 renew_lease(server, wdata->timestamp);
1850 nfs_post_op_update_inode(inode, fattr);
1851 return wdata->res.count;
1854 static int nfs4_proc_write(struct nfs_write_data *wdata)
1856 struct nfs4_exception exception = { };
1859 err = nfs4_handle_exception(NFS_SERVER(wdata->inode),
1860 _nfs4_proc_write(wdata),
1862 } while (exception.retry);
1866 static int _nfs4_proc_commit(struct nfs_write_data *cdata)
1868 struct inode *inode = cdata->inode;
1869 struct nfs_fattr *fattr = cdata->res.fattr;
1870 struct nfs_server *server = NFS_SERVER(inode);
1871 struct rpc_message msg = {
1872 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
1873 .rpc_argp = &cdata->args,
1874 .rpc_resp = &cdata->res,
1875 .rpc_cred = cdata->cred,
1879 dprintk("NFS call commit %d @ %Ld\n", cdata->args.count,
1880 (long long) cdata->args.offset);
1882 cdata->args.bitmask = server->attr_bitmask;
1883 cdata->res.server = server;
1884 cdata->timestamp = jiffies;
1885 nfs_fattr_init(fattr);
1886 status = rpc_call_sync(server->client, &msg, 0);
1888 renew_lease(server, cdata->timestamp);
1889 dprintk("NFS reply commit: %d\n", status);
1891 nfs_post_op_update_inode(inode, fattr);
1895 static int nfs4_proc_commit(struct nfs_write_data *cdata)
1897 struct nfs4_exception exception = { };
1900 err = nfs4_handle_exception(NFS_SERVER(cdata->inode),
1901 _nfs4_proc_commit(cdata),
1903 } while (exception.retry);
1909 * We will need to arrange for the VFS layer to provide an atomic open.
1910 * Until then, this create/open method is prone to inefficiency and race
1911 * conditions due to the lookup, create, and open VFS calls from sys_open()
1912 * placed on the wire.
1914 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1915 * The file will be opened again in the subsequent VFS open call
1916 * (nfs4_proc_file_open).
1918 * The open for read will just hang around to be used by any process that
1919 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1923 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
1924 int flags, struct nameidata *nd)
1926 struct nfs4_state *state;
1927 struct rpc_cred *cred;
1930 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1932 status = PTR_ERR(cred);
1935 state = nfs4_do_open(dir, dentry, flags, sattr, cred);
1937 if (IS_ERR(state)) {
1938 status = PTR_ERR(state);
1941 d_instantiate(dentry, igrab(state->inode));
1942 if (flags & O_EXCL) {
1943 struct nfs_fattr fattr;
1944 status = nfs4_do_setattr(state->inode, &fattr, sattr, state);
1946 nfs_setattr_update_inode(state->inode, sattr);
1948 if (status == 0 && nd != NULL && (nd->flags & LOOKUP_OPEN))
1949 status = nfs4_intent_set_file(nd, dentry, state);
1951 nfs4_close_state(state, flags);
1956 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1958 struct nfs_server *server = NFS_SERVER(dir);
1959 struct nfs4_remove_arg args = {
1962 .bitmask = server->attr_bitmask,
1964 struct nfs_fattr dir_attr;
1965 struct nfs4_remove_res res = {
1967 .dir_attr = &dir_attr,
1969 struct rpc_message msg = {
1970 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1976 nfs_fattr_init(res.dir_attr);
1977 status = rpc_call_sync(server->client, &msg, 0);
1979 update_changeattr(dir, &res.cinfo);
1980 nfs_post_op_update_inode(dir, res.dir_attr);
1985 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1987 struct nfs4_exception exception = { };
1990 err = nfs4_handle_exception(NFS_SERVER(dir),
1991 _nfs4_proc_remove(dir, name),
1993 } while (exception.retry);
1997 struct unlink_desc {
1998 struct nfs4_remove_arg args;
1999 struct nfs4_remove_res res;
2000 struct nfs_fattr dir_attr;
2003 static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir,
2006 struct nfs_server *server = NFS_SERVER(dir->d_inode);
2007 struct unlink_desc *up;
2009 up = (struct unlink_desc *) kmalloc(sizeof(*up), GFP_KERNEL);
2013 up->args.fh = NFS_FH(dir->d_inode);
2014 up->args.name = name;
2015 up->args.bitmask = server->attr_bitmask;
2016 up->res.server = server;
2017 up->res.dir_attr = &up->dir_attr;
2019 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2020 msg->rpc_argp = &up->args;
2021 msg->rpc_resp = &up->res;
2025 static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
2027 struct rpc_message *msg = &task->tk_msg;
2028 struct unlink_desc *up;
2030 if (msg->rpc_resp != NULL) {
2031 up = container_of(msg->rpc_resp, struct unlink_desc, res);
2032 update_changeattr(dir->d_inode, &up->res.cinfo);
2033 nfs_post_op_update_inode(dir->d_inode, up->res.dir_attr);
2035 msg->rpc_resp = NULL;
2036 msg->rpc_argp = NULL;
2041 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2042 struct inode *new_dir, struct qstr *new_name)
2044 struct nfs_server *server = NFS_SERVER(old_dir);
2045 struct nfs4_rename_arg arg = {
2046 .old_dir = NFS_FH(old_dir),
2047 .new_dir = NFS_FH(new_dir),
2048 .old_name = old_name,
2049 .new_name = new_name,
2050 .bitmask = server->attr_bitmask,
2052 struct nfs_fattr old_fattr, new_fattr;
2053 struct nfs4_rename_res res = {
2055 .old_fattr = &old_fattr,
2056 .new_fattr = &new_fattr,
2058 struct rpc_message msg = {
2059 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2065 nfs_fattr_init(res.old_fattr);
2066 nfs_fattr_init(res.new_fattr);
2067 status = rpc_call_sync(server->client, &msg, 0);
2070 update_changeattr(old_dir, &res.old_cinfo);
2071 nfs_post_op_update_inode(old_dir, res.old_fattr);
2072 update_changeattr(new_dir, &res.new_cinfo);
2073 nfs_post_op_update_inode(new_dir, res.new_fattr);
2078 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2079 struct inode *new_dir, struct qstr *new_name)
2081 struct nfs4_exception exception = { };
2084 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2085 _nfs4_proc_rename(old_dir, old_name,
2088 } while (exception.retry);
2092 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2094 struct nfs_server *server = NFS_SERVER(inode);
2095 struct nfs4_link_arg arg = {
2096 .fh = NFS_FH(inode),
2097 .dir_fh = NFS_FH(dir),
2099 .bitmask = server->attr_bitmask,
2101 struct nfs_fattr fattr, dir_attr;
2102 struct nfs4_link_res res = {
2105 .dir_attr = &dir_attr,
2107 struct rpc_message msg = {
2108 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2114 nfs_fattr_init(res.fattr);
2115 nfs_fattr_init(res.dir_attr);
2116 status = rpc_call_sync(server->client, &msg, 0);
2118 update_changeattr(dir, &res.cinfo);
2119 nfs_post_op_update_inode(dir, res.dir_attr);
2120 nfs_post_op_update_inode(inode, res.fattr);
2126 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2128 struct nfs4_exception exception = { };
2131 err = nfs4_handle_exception(NFS_SERVER(inode),
2132 _nfs4_proc_link(inode, dir, name),
2134 } while (exception.retry);
2138 static int _nfs4_proc_symlink(struct inode *dir, struct qstr *name,
2139 struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle,
2140 struct nfs_fattr *fattr)
2142 struct nfs_server *server = NFS_SERVER(dir);
2143 struct nfs_fattr dir_fattr;
2144 struct nfs4_create_arg arg = {
2145 .dir_fh = NFS_FH(dir),
2150 .bitmask = server->attr_bitmask,
2152 struct nfs4_create_res res = {
2156 .dir_fattr = &dir_fattr,
2158 struct rpc_message msg = {
2159 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
2165 if (path->len > NFS4_MAXPATHLEN)
2166 return -ENAMETOOLONG;
2167 arg.u.symlink = path;
2168 nfs_fattr_init(fattr);
2169 nfs_fattr_init(&dir_fattr);
2171 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2173 update_changeattr(dir, &res.dir_cinfo);
2174 nfs_post_op_update_inode(dir, res.dir_fattr);
2178 static int nfs4_proc_symlink(struct inode *dir, struct qstr *name,
2179 struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle,
2180 struct nfs_fattr *fattr)
2182 struct nfs4_exception exception = { };
2185 err = nfs4_handle_exception(NFS_SERVER(dir),
2186 _nfs4_proc_symlink(dir, name, path, sattr,
2189 } while (exception.retry);
2193 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2194 struct iattr *sattr)
2196 struct nfs_server *server = NFS_SERVER(dir);
2197 struct nfs_fh fhandle;
2198 struct nfs_fattr fattr, dir_fattr;
2199 struct nfs4_create_arg arg = {
2200 .dir_fh = NFS_FH(dir),
2202 .name = &dentry->d_name,
2205 .bitmask = server->attr_bitmask,
2207 struct nfs4_create_res res = {
2211 .dir_fattr = &dir_fattr,
2213 struct rpc_message msg = {
2214 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2220 nfs_fattr_init(&fattr);
2221 nfs_fattr_init(&dir_fattr);
2223 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2225 update_changeattr(dir, &res.dir_cinfo);
2226 nfs_post_op_update_inode(dir, res.dir_fattr);
2227 status = nfs_instantiate(dentry, &fhandle, &fattr);
2232 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2233 struct iattr *sattr)
2235 struct nfs4_exception exception = { };
2238 err = nfs4_handle_exception(NFS_SERVER(dir),
2239 _nfs4_proc_mkdir(dir, dentry, sattr),
2241 } while (exception.retry);
2245 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2246 u64 cookie, struct page *page, unsigned int count, int plus)
2248 struct inode *dir = dentry->d_inode;
2249 struct nfs4_readdir_arg args = {
2254 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2256 struct nfs4_readdir_res res;
2257 struct rpc_message msg = {
2258 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2265 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
2266 dentry->d_parent->d_name.name,
2267 dentry->d_name.name,
2268 (unsigned long long)cookie);
2270 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2271 res.pgbase = args.pgbase;
2272 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2274 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2276 dprintk("%s: returns %d\n", __FUNCTION__, status);
2280 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2281 u64 cookie, struct page *page, unsigned int count, int plus)
2283 struct nfs4_exception exception = { };
2286 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2287 _nfs4_proc_readdir(dentry, cred, cookie,
2290 } while (exception.retry);
2294 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2295 struct iattr *sattr, dev_t rdev)
2297 struct nfs_server *server = NFS_SERVER(dir);
2299 struct nfs_fattr fattr, dir_fattr;
2300 struct nfs4_create_arg arg = {
2301 .dir_fh = NFS_FH(dir),
2303 .name = &dentry->d_name,
2305 .bitmask = server->attr_bitmask,
2307 struct nfs4_create_res res = {
2311 .dir_fattr = &dir_fattr,
2313 struct rpc_message msg = {
2314 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2319 int mode = sattr->ia_mode;
2321 nfs_fattr_init(&fattr);
2322 nfs_fattr_init(&dir_fattr);
2324 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2325 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2327 arg.ftype = NF4FIFO;
2328 else if (S_ISBLK(mode)) {
2330 arg.u.device.specdata1 = MAJOR(rdev);
2331 arg.u.device.specdata2 = MINOR(rdev);
2333 else if (S_ISCHR(mode)) {
2335 arg.u.device.specdata1 = MAJOR(rdev);
2336 arg.u.device.specdata2 = MINOR(rdev);
2339 arg.ftype = NF4SOCK;
2341 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2343 update_changeattr(dir, &res.dir_cinfo);
2344 nfs_post_op_update_inode(dir, res.dir_fattr);
2345 status = nfs_instantiate(dentry, &fh, &fattr);
2350 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2351 struct iattr *sattr, dev_t rdev)
2353 struct nfs4_exception exception = { };
2356 err = nfs4_handle_exception(NFS_SERVER(dir),
2357 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2359 } while (exception.retry);
2363 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2364 struct nfs_fsstat *fsstat)
2366 struct nfs4_statfs_arg args = {
2368 .bitmask = server->attr_bitmask,
2370 struct rpc_message msg = {
2371 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2376 nfs_fattr_init(fsstat->fattr);
2377 return rpc_call_sync(server->client, &msg, 0);
2380 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2382 struct nfs4_exception exception = { };
2385 err = nfs4_handle_exception(server,
2386 _nfs4_proc_statfs(server, fhandle, fsstat),
2388 } while (exception.retry);
2392 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2393 struct nfs_fsinfo *fsinfo)
2395 struct nfs4_fsinfo_arg args = {
2397 .bitmask = server->attr_bitmask,
2399 struct rpc_message msg = {
2400 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2405 return rpc_call_sync(server->client, &msg, 0);
2408 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2410 struct nfs4_exception exception = { };
2414 err = nfs4_handle_exception(server,
2415 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2417 } while (exception.retry);
2421 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2423 nfs_fattr_init(fsinfo->fattr);
2424 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2427 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2428 struct nfs_pathconf *pathconf)
2430 struct nfs4_pathconf_arg args = {
2432 .bitmask = server->attr_bitmask,
2434 struct rpc_message msg = {
2435 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2437 .rpc_resp = pathconf,
2440 /* None of the pathconf attributes are mandatory to implement */
2441 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2442 memset(pathconf, 0, sizeof(*pathconf));
2446 nfs_fattr_init(pathconf->fattr);
2447 return rpc_call_sync(server->client, &msg, 0);
2450 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2451 struct nfs_pathconf *pathconf)
2453 struct nfs4_exception exception = { };
2457 err = nfs4_handle_exception(server,
2458 _nfs4_proc_pathconf(server, fhandle, pathconf),
2460 } while (exception.retry);
2464 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
2466 struct nfs_server *server = NFS_SERVER(data->inode);
2468 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
2469 rpc_restart_call(task);
2472 if (task->tk_status > 0)
2473 renew_lease(server, data->timestamp);
2477 static void nfs4_proc_read_setup(struct nfs_read_data *data)
2479 struct rpc_message msg = {
2480 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
2481 .rpc_argp = &data->args,
2482 .rpc_resp = &data->res,
2483 .rpc_cred = data->cred,
2486 data->timestamp = jiffies;
2488 rpc_call_setup(&data->task, &msg, 0);
2491 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
2493 struct inode *inode = data->inode;
2495 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2496 rpc_restart_call(task);
2499 if (task->tk_status >= 0) {
2500 renew_lease(NFS_SERVER(inode), data->timestamp);
2501 nfs_post_op_update_inode(inode, data->res.fattr);
2506 static void nfs4_proc_write_setup(struct nfs_write_data *data, int how)
2508 struct rpc_message msg = {
2509 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
2510 .rpc_argp = &data->args,
2511 .rpc_resp = &data->res,
2512 .rpc_cred = data->cred,
2514 struct inode *inode = data->inode;
2515 struct nfs_server *server = NFS_SERVER(inode);
2518 if (how & FLUSH_STABLE) {
2519 if (!NFS_I(inode)->ncommit)
2520 stable = NFS_FILE_SYNC;
2522 stable = NFS_DATA_SYNC;
2524 stable = NFS_UNSTABLE;
2525 data->args.stable = stable;
2526 data->args.bitmask = server->attr_bitmask;
2527 data->res.server = server;
2529 data->timestamp = jiffies;
2531 /* Finalize the task. */
2532 rpc_call_setup(&data->task, &msg, 0);
2535 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
2537 struct inode *inode = data->inode;
2539 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2540 rpc_restart_call(task);
2543 if (task->tk_status >= 0)
2544 nfs_post_op_update_inode(inode, data->res.fattr);
2548 static void nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
2550 struct rpc_message msg = {
2551 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
2552 .rpc_argp = &data->args,
2553 .rpc_resp = &data->res,
2554 .rpc_cred = data->cred,
2556 struct nfs_server *server = NFS_SERVER(data->inode);
2558 data->args.bitmask = server->attr_bitmask;
2559 data->res.server = server;
2561 rpc_call_setup(&data->task, &msg, 0);
2565 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2566 * standalone procedure for queueing an asynchronous RENEW.
2568 static void nfs4_renew_done(struct rpc_task *task, void *data)
2570 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
2571 unsigned long timestamp = (unsigned long)data;
2573 if (task->tk_status < 0) {
2574 switch (task->tk_status) {
2575 case -NFS4ERR_STALE_CLIENTID:
2576 case -NFS4ERR_EXPIRED:
2577 case -NFS4ERR_CB_PATH_DOWN:
2578 nfs4_schedule_state_recovery(clp);
2582 spin_lock(&clp->cl_lock);
2583 if (time_before(clp->cl_last_renewal,timestamp))
2584 clp->cl_last_renewal = timestamp;
2585 spin_unlock(&clp->cl_lock);
2588 static const struct rpc_call_ops nfs4_renew_ops = {
2589 .rpc_call_done = nfs4_renew_done,
2592 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
2594 struct rpc_message msg = {
2595 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2600 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
2601 &nfs4_renew_ops, (void *)jiffies);
2604 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
2606 struct rpc_message msg = {
2607 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2611 unsigned long now = jiffies;
2614 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2617 spin_lock(&clp->cl_lock);
2618 if (time_before(clp->cl_last_renewal,now))
2619 clp->cl_last_renewal = now;
2620 spin_unlock(&clp->cl_lock);
2624 static inline int nfs4_server_supports_acls(struct nfs_server *server)
2626 return (server->caps & NFS_CAP_ACLS)
2627 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2628 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2631 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2632 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2635 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2637 static void buf_to_pages(const void *buf, size_t buflen,
2638 struct page **pages, unsigned int *pgbase)
2640 const void *p = buf;
2642 *pgbase = offset_in_page(buf);
2644 while (p < buf + buflen) {
2645 *(pages++) = virt_to_page(p);
2646 p += PAGE_CACHE_SIZE;
2650 struct nfs4_cached_acl {
2656 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2658 struct nfs_inode *nfsi = NFS_I(inode);
2660 spin_lock(&inode->i_lock);
2661 kfree(nfsi->nfs4_acl);
2662 nfsi->nfs4_acl = acl;
2663 spin_unlock(&inode->i_lock);
2666 static void nfs4_zap_acl_attr(struct inode *inode)
2668 nfs4_set_cached_acl(inode, NULL);
2671 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2673 struct nfs_inode *nfsi = NFS_I(inode);
2674 struct nfs4_cached_acl *acl;
2677 spin_lock(&inode->i_lock);
2678 acl = nfsi->nfs4_acl;
2681 if (buf == NULL) /* user is just asking for length */
2683 if (acl->cached == 0)
2685 ret = -ERANGE; /* see getxattr(2) man page */
2686 if (acl->len > buflen)
2688 memcpy(buf, acl->data, acl->len);
2692 spin_unlock(&inode->i_lock);
2696 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2698 struct nfs4_cached_acl *acl;
2700 if (buf && acl_len <= PAGE_SIZE) {
2701 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2705 memcpy(acl->data, buf, acl_len);
2707 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2714 nfs4_set_cached_acl(inode, acl);
2717 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2719 struct page *pages[NFS4ACL_MAXPAGES];
2720 struct nfs_getaclargs args = {
2721 .fh = NFS_FH(inode),
2725 size_t resp_len = buflen;
2727 struct rpc_message msg = {
2728 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2730 .rpc_resp = &resp_len,
2732 struct page *localpage = NULL;
2735 if (buflen < PAGE_SIZE) {
2736 /* As long as we're doing a round trip to the server anyway,
2737 * let's be prepared for a page of acl data. */
2738 localpage = alloc_page(GFP_KERNEL);
2739 resp_buf = page_address(localpage);
2740 if (localpage == NULL)
2742 args.acl_pages[0] = localpage;
2743 args.acl_pgbase = 0;
2744 resp_len = args.acl_len = PAGE_SIZE;
2747 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2749 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2752 if (resp_len > args.acl_len)
2753 nfs4_write_cached_acl(inode, NULL, resp_len);
2755 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2758 if (resp_len > buflen)
2761 memcpy(buf, resp_buf, resp_len);
2766 __free_page(localpage);
2770 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2772 struct nfs4_exception exception = { };
2775 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2778 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2779 } while (exception.retry);
2783 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2785 struct nfs_server *server = NFS_SERVER(inode);
2788 if (!nfs4_server_supports_acls(server))
2790 ret = nfs_revalidate_inode(server, inode);
2793 ret = nfs4_read_cached_acl(inode, buf, buflen);
2796 return nfs4_get_acl_uncached(inode, buf, buflen);
2799 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2801 struct nfs_server *server = NFS_SERVER(inode);
2802 struct page *pages[NFS4ACL_MAXPAGES];
2803 struct nfs_setaclargs arg = {
2804 .fh = NFS_FH(inode),
2808 struct rpc_message msg = {
2809 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2815 if (!nfs4_server_supports_acls(server))
2817 nfs_inode_return_delegation(inode);
2818 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
2819 ret = rpc_call_sync(NFS_SERVER(inode)->client, &msg, 0);
2821 nfs4_write_cached_acl(inode, buf, buflen);
2825 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2827 struct nfs4_exception exception = { };
2830 err = nfs4_handle_exception(NFS_SERVER(inode),
2831 __nfs4_proc_set_acl(inode, buf, buflen),
2833 } while (exception.retry);
2838 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
2840 struct nfs_client *clp = server->nfs_client;
2842 if (!clp || task->tk_status >= 0)
2844 switch(task->tk_status) {
2845 case -NFS4ERR_STALE_CLIENTID:
2846 case -NFS4ERR_STALE_STATEID:
2847 case -NFS4ERR_EXPIRED:
2848 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2849 nfs4_schedule_state_recovery(clp);
2850 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
2851 rpc_wake_up_task(task);
2852 task->tk_status = 0;
2854 case -NFS4ERR_DELAY:
2855 nfs_inc_server_stats((struct nfs_server *) server,
2857 case -NFS4ERR_GRACE:
2858 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2859 task->tk_status = 0;
2861 case -NFS4ERR_OLD_STATEID:
2862 task->tk_status = 0;
2865 task->tk_status = nfs4_map_errors(task->tk_status);
2869 static int nfs4_wait_bit_interruptible(void *word)
2871 if (signal_pending(current))
2872 return -ERESTARTSYS;
2877 static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
2884 rpc_clnt_sigmask(clnt, &oldset);
2885 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
2886 nfs4_wait_bit_interruptible,
2887 TASK_INTERRUPTIBLE);
2888 rpc_clnt_sigunmask(clnt, &oldset);
2892 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2900 *timeout = NFS4_POLL_RETRY_MIN;
2901 if (*timeout > NFS4_POLL_RETRY_MAX)
2902 *timeout = NFS4_POLL_RETRY_MAX;
2903 rpc_clnt_sigmask(clnt, &oldset);
2904 if (clnt->cl_intr) {
2905 schedule_timeout_interruptible(*timeout);
2909 schedule_timeout_uninterruptible(*timeout);
2910 rpc_clnt_sigunmask(clnt, &oldset);
2915 /* This is the error handling routine for processes that are allowed
2918 int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
2920 struct nfs_client *clp = server->nfs_client;
2921 int ret = errorcode;
2923 exception->retry = 0;
2927 case -NFS4ERR_STALE_CLIENTID:
2928 case -NFS4ERR_STALE_STATEID:
2929 case -NFS4ERR_EXPIRED:
2930 nfs4_schedule_state_recovery(clp);
2931 ret = nfs4_wait_clnt_recover(server->client, clp);
2933 exception->retry = 1;
2935 case -NFS4ERR_GRACE:
2936 case -NFS4ERR_DELAY:
2937 ret = nfs4_delay(server->client, &exception->timeout);
2940 case -NFS4ERR_OLD_STATEID:
2941 exception->retry = 1;
2943 /* We failed to handle the error */
2944 return nfs4_map_errors(ret);
2947 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
2949 nfs4_verifier sc_verifier;
2950 struct nfs4_setclientid setclientid = {
2951 .sc_verifier = &sc_verifier,
2954 struct rpc_message msg = {
2955 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2956 .rpc_argp = &setclientid,
2964 p = (u32*)sc_verifier.data;
2965 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2966 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2969 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2970 sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u",
2971 clp->cl_ipaddr, NIPQUAD(clp->cl_addr.sin_addr),
2972 cred->cr_ops->cr_name,
2973 clp->cl_id_uniquifier);
2974 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2975 sizeof(setclientid.sc_netid), "tcp");
2976 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2977 sizeof(setclientid.sc_uaddr), "%s.%d.%d",
2978 clp->cl_ipaddr, port >> 8, port & 255);
2980 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2981 if (status != -NFS4ERR_CLID_INUSE)
2986 ssleep(clp->cl_lease_time + 1);
2988 if (++clp->cl_id_uniquifier == 0)
2994 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
2996 struct nfs_fsinfo fsinfo;
2997 struct rpc_message msg = {
2998 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3000 .rpc_resp = &fsinfo,
3007 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3009 spin_lock(&clp->cl_lock);
3010 clp->cl_lease_time = fsinfo.lease_time * HZ;
3011 clp->cl_last_renewal = now;
3012 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
3013 spin_unlock(&clp->cl_lock);
3018 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
3023 err = _nfs4_proc_setclientid_confirm(clp, cred);
3027 case -NFS4ERR_RESOURCE:
3028 /* The IBM lawyers misread another document! */
3029 case -NFS4ERR_DELAY:
3030 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3036 struct nfs4_delegreturndata {
3037 struct nfs4_delegreturnargs args;
3038 struct nfs4_delegreturnres res;
3040 nfs4_stateid stateid;
3041 struct rpc_cred *cred;
3042 unsigned long timestamp;
3043 struct nfs_fattr fattr;
3047 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata)
3049 struct nfs4_delegreturndata *data = calldata;
3050 struct rpc_message msg = {
3051 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3052 .rpc_argp = &data->args,
3053 .rpc_resp = &data->res,
3054 .rpc_cred = data->cred,
3056 nfs_fattr_init(data->res.fattr);
3057 rpc_call_setup(task, &msg, 0);
3060 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3062 struct nfs4_delegreturndata *data = calldata;
3063 data->rpc_status = task->tk_status;
3064 if (data->rpc_status == 0)
3065 renew_lease(data->res.server, data->timestamp);
3068 static void nfs4_delegreturn_release(void *calldata)
3070 struct nfs4_delegreturndata *data = calldata;
3072 put_rpccred(data->cred);
3076 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3077 .rpc_call_prepare = nfs4_delegreturn_prepare,
3078 .rpc_call_done = nfs4_delegreturn_done,
3079 .rpc_release = nfs4_delegreturn_release,
3082 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
3084 struct nfs4_delegreturndata *data;
3085 struct nfs_server *server = NFS_SERVER(inode);
3086 struct rpc_task *task;
3089 data = kmalloc(sizeof(*data), GFP_KERNEL);
3092 data->args.fhandle = &data->fh;
3093 data->args.stateid = &data->stateid;
3094 data->args.bitmask = server->attr_bitmask;
3095 nfs_copy_fh(&data->fh, NFS_FH(inode));
3096 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3097 data->res.fattr = &data->fattr;
3098 data->res.server = server;
3099 data->cred = get_rpccred(cred);
3100 data->timestamp = jiffies;
3101 data->rpc_status = 0;
3103 task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data);
3105 return PTR_ERR(task);
3106 status = nfs4_wait_for_completion_rpc_task(task);
3108 status = data->rpc_status;
3110 nfs_post_op_update_inode(inode, &data->fattr);
3112 rpc_release_task(task);
3116 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
3118 struct nfs_server *server = NFS_SERVER(inode);
3119 struct nfs4_exception exception = { };
3122 err = _nfs4_proc_delegreturn(inode, cred, stateid);
3124 case -NFS4ERR_STALE_STATEID:
3125 case -NFS4ERR_EXPIRED:
3126 nfs4_schedule_state_recovery(server->nfs_client);
3130 err = nfs4_handle_exception(server, err, &exception);
3131 } while (exception.retry);
3135 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3136 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3139 * sleep, with exponential backoff, and retry the LOCK operation.
3141 static unsigned long
3142 nfs4_set_lock_task_retry(unsigned long timeout)
3144 schedule_timeout_interruptible(timeout);
3146 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3147 return NFS4_LOCK_MAXTIMEOUT;
3151 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3153 struct inode *inode = state->inode;
3154 struct nfs_server *server = NFS_SERVER(inode);
3155 struct nfs_client *clp = server->nfs_client;
3156 struct nfs_lockt_args arg = {
3157 .fh = NFS_FH(inode),
3160 struct nfs_lockt_res res = {
3163 struct rpc_message msg = {
3164 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3167 .rpc_cred = state->owner->so_cred,
3169 struct nfs4_lock_state *lsp;
3172 down_read(&clp->cl_sem);
3173 arg.lock_owner.clientid = clp->cl_clientid;
3174 status = nfs4_set_lock_state(state, request);
3177 lsp = request->fl_u.nfs4_fl.owner;
3178 arg.lock_owner.id = lsp->ls_id;
3179 status = rpc_call_sync(server->client, &msg, 0);
3182 request->fl_type = F_UNLCK;
3184 case -NFS4ERR_DENIED:
3188 up_read(&clp->cl_sem);
3192 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3194 struct nfs4_exception exception = { };
3198 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3199 _nfs4_proc_getlk(state, cmd, request),
3201 } while (exception.retry);
3205 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3208 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3210 res = posix_lock_file_wait(file, fl);
3213 res = flock_lock_file_wait(file, fl);
3221 struct nfs4_unlockdata {
3222 struct nfs_locku_args arg;
3223 struct nfs_locku_res res;
3224 struct nfs4_lock_state *lsp;
3225 struct nfs_open_context *ctx;
3226 struct file_lock fl;
3227 const struct nfs_server *server;
3228 unsigned long timestamp;
3231 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3232 struct nfs_open_context *ctx,
3233 struct nfs4_lock_state *lsp,
3234 struct nfs_seqid *seqid)
3236 struct nfs4_unlockdata *p;
3237 struct inode *inode = lsp->ls_state->inode;
3239 p = kmalloc(sizeof(*p), GFP_KERNEL);
3242 p->arg.fh = NFS_FH(inode);
3244 p->arg.seqid = seqid;
3245 p->arg.stateid = &lsp->ls_stateid;
3247 atomic_inc(&lsp->ls_count);
3248 /* Ensure we don't close file until we're done freeing locks! */
3249 p->ctx = get_nfs_open_context(ctx);
3250 memcpy(&p->fl, fl, sizeof(p->fl));
3251 p->server = NFS_SERVER(inode);
3255 static void nfs4_locku_release_calldata(void *data)
3257 struct nfs4_unlockdata *calldata = data;
3258 nfs_free_seqid(calldata->arg.seqid);
3259 nfs4_put_lock_state(calldata->lsp);
3260 put_nfs_open_context(calldata->ctx);
3264 static void nfs4_locku_done(struct rpc_task *task, void *data)
3266 struct nfs4_unlockdata *calldata = data;
3268 if (RPC_ASSASSINATED(task))
3270 nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid);
3271 switch (task->tk_status) {
3273 memcpy(calldata->lsp->ls_stateid.data,
3274 calldata->res.stateid.data,
3275 sizeof(calldata->lsp->ls_stateid.data));
3276 renew_lease(calldata->server, calldata->timestamp);
3278 case -NFS4ERR_STALE_STATEID:
3279 case -NFS4ERR_EXPIRED:
3280 nfs4_schedule_state_recovery(calldata->server->nfs_client);
3283 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN) {
3284 rpc_restart_call(task);
3289 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3291 struct nfs4_unlockdata *calldata = data;
3292 struct rpc_message msg = {
3293 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3294 .rpc_argp = &calldata->arg,
3295 .rpc_resp = &calldata->res,
3296 .rpc_cred = calldata->lsp->ls_state->owner->so_cred,
3299 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3301 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3302 /* Note: exit _without_ running nfs4_locku_done */
3303 task->tk_action = NULL;
3306 calldata->timestamp = jiffies;
3307 rpc_call_setup(task, &msg, 0);
3310 static const struct rpc_call_ops nfs4_locku_ops = {
3311 .rpc_call_prepare = nfs4_locku_prepare,
3312 .rpc_call_done = nfs4_locku_done,
3313 .rpc_release = nfs4_locku_release_calldata,
3316 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3317 struct nfs_open_context *ctx,
3318 struct nfs4_lock_state *lsp,
3319 struct nfs_seqid *seqid)
3321 struct nfs4_unlockdata *data;
3323 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3325 nfs_free_seqid(seqid);
3326 return ERR_PTR(-ENOMEM);
3329 return rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data);
3332 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3334 struct nfs_seqid *seqid;
3335 struct nfs4_lock_state *lsp;
3336 struct rpc_task *task;
3339 status = nfs4_set_lock_state(state, request);
3340 /* Unlock _before_ we do the RPC call */
3341 request->fl_flags |= FL_EXISTS;
3342 if (do_vfs_lock(request->fl_file, request) == -ENOENT)
3346 /* Is this a delegated lock? */
3347 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3349 lsp = request->fl_u.nfs4_fl.owner;
3350 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3354 task = nfs4_do_unlck(request, request->fl_file->private_data, lsp, seqid);
3355 status = PTR_ERR(task);
3358 status = nfs4_wait_for_completion_rpc_task(task);
3359 rpc_release_task(task);
3364 struct nfs4_lockdata {
3365 struct nfs_lock_args arg;
3366 struct nfs_lock_res res;
3367 struct nfs4_lock_state *lsp;
3368 struct nfs_open_context *ctx;
3369 struct file_lock fl;
3370 unsigned long timestamp;
3375 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3376 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3378 struct nfs4_lockdata *p;
3379 struct inode *inode = lsp->ls_state->inode;
3380 struct nfs_server *server = NFS_SERVER(inode);
3382 p = kzalloc(sizeof(*p), GFP_KERNEL);
3386 p->arg.fh = NFS_FH(inode);
3388 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3389 if (p->arg.lock_seqid == NULL)
3391 p->arg.lock_stateid = &lsp->ls_stateid;
3392 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
3393 p->arg.lock_owner.id = lsp->ls_id;
3395 atomic_inc(&lsp->ls_count);
3396 p->ctx = get_nfs_open_context(ctx);
3397 memcpy(&p->fl, fl, sizeof(p->fl));
3404 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3406 struct nfs4_lockdata *data = calldata;
3407 struct nfs4_state *state = data->lsp->ls_state;
3408 struct nfs4_state_owner *sp = state->owner;
3409 struct rpc_message msg = {
3410 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3411 .rpc_argp = &data->arg,
3412 .rpc_resp = &data->res,
3413 .rpc_cred = sp->so_cred,
3416 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3418 dprintk("%s: begin!\n", __FUNCTION__);
3419 /* Do we need to do an open_to_lock_owner? */
3420 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3421 data->arg.open_seqid = nfs_alloc_seqid(&sp->so_seqid);
3422 if (data->arg.open_seqid == NULL) {
3423 data->rpc_status = -ENOMEM;
3424 task->tk_action = NULL;
3427 data->arg.open_stateid = &state->stateid;
3428 data->arg.new_lock_owner = 1;
3430 data->timestamp = jiffies;
3431 rpc_call_setup(task, &msg, 0);
3433 dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
3436 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3438 struct nfs4_lockdata *data = calldata;
3440 dprintk("%s: begin!\n", __FUNCTION__);
3442 data->rpc_status = task->tk_status;
3443 if (RPC_ASSASSINATED(task))
3445 if (data->arg.new_lock_owner != 0) {
3446 nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid);
3447 if (data->rpc_status == 0)
3448 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3452 if (data->rpc_status == 0) {
3453 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3454 sizeof(data->lsp->ls_stateid.data));
3455 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3456 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
3458 nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
3460 dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
3463 static void nfs4_lock_release(void *calldata)
3465 struct nfs4_lockdata *data = calldata;
3467 dprintk("%s: begin!\n", __FUNCTION__);
3468 if (data->arg.open_seqid != NULL)
3469 nfs_free_seqid(data->arg.open_seqid);
3470 if (data->cancelled != 0) {
3471 struct rpc_task *task;
3472 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3473 data->arg.lock_seqid);
3475 rpc_release_task(task);
3476 dprintk("%s: cancelling lock!\n", __FUNCTION__);
3478 nfs_free_seqid(data->arg.lock_seqid);
3479 nfs4_put_lock_state(data->lsp);
3480 put_nfs_open_context(data->ctx);
3482 dprintk("%s: done!\n", __FUNCTION__);
3485 static const struct rpc_call_ops nfs4_lock_ops = {
3486 .rpc_call_prepare = nfs4_lock_prepare,
3487 .rpc_call_done = nfs4_lock_done,
3488 .rpc_release = nfs4_lock_release,
3491 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3493 struct nfs4_lockdata *data;
3494 struct rpc_task *task;
3497 dprintk("%s: begin!\n", __FUNCTION__);
3498 data = nfs4_alloc_lockdata(fl, fl->fl_file->private_data,
3499 fl->fl_u.nfs4_fl.owner);
3503 data->arg.block = 1;
3505 data->arg.reclaim = 1;
3506 task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC,
3507 &nfs4_lock_ops, data);
3509 return PTR_ERR(task);
3510 ret = nfs4_wait_for_completion_rpc_task(task);
3512 ret = data->rpc_status;
3513 if (ret == -NFS4ERR_DENIED)
3516 data->cancelled = 1;
3517 rpc_release_task(task);
3518 dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret);
3522 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3524 struct nfs_server *server = NFS_SERVER(state->inode);
3525 struct nfs4_exception exception = { };
3529 /* Cache the lock if possible... */
3530 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3532 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3533 if (err != -NFS4ERR_DELAY)
3535 nfs4_handle_exception(server, err, &exception);
3536 } while (exception.retry);
3540 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3542 struct nfs_server *server = NFS_SERVER(state->inode);
3543 struct nfs4_exception exception = { };
3546 err = nfs4_set_lock_state(state, request);
3550 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3552 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3553 if (err != -NFS4ERR_DELAY)
3555 nfs4_handle_exception(server, err, &exception);
3556 } while (exception.retry);
3560 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3562 struct nfs_client *clp = state->owner->so_client;
3563 unsigned char fl_flags = request->fl_flags;
3566 /* Is this a delegated open? */
3567 status = nfs4_set_lock_state(state, request);
3570 request->fl_flags |= FL_ACCESS;
3571 status = do_vfs_lock(request->fl_file, request);
3574 down_read(&clp->cl_sem);
3575 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3576 struct nfs_inode *nfsi = NFS_I(state->inode);
3577 /* Yes: cache locks! */
3578 down_read(&nfsi->rwsem);
3579 /* ...but avoid races with delegation recall... */
3580 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3581 request->fl_flags = fl_flags & ~FL_SLEEP;
3582 status = do_vfs_lock(request->fl_file, request);
3583 up_read(&nfsi->rwsem);
3586 up_read(&nfsi->rwsem);
3588 status = _nfs4_do_setlk(state, cmd, request, 0);
3591 /* Note: we always want to sleep here! */
3592 request->fl_flags = fl_flags | FL_SLEEP;
3593 if (do_vfs_lock(request->fl_file, request) < 0)
3594 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
3596 up_read(&clp->cl_sem);
3598 request->fl_flags = fl_flags;
3602 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3604 struct nfs4_exception exception = { };
3608 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3609 _nfs4_proc_setlk(state, cmd, request),
3611 } while (exception.retry);
3616 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3618 struct nfs_open_context *ctx;
3619 struct nfs4_state *state;
3620 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3623 /* verify open state */
3624 ctx = (struct nfs_open_context *)filp->private_data;
3627 if (request->fl_start < 0 || request->fl_end < 0)
3631 return nfs4_proc_getlk(state, F_GETLK, request);
3633 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3636 if (request->fl_type == F_UNLCK)
3637 return nfs4_proc_unlck(state, cmd, request);
3640 status = nfs4_proc_setlk(state, cmd, request);
3641 if ((status != -EAGAIN) || IS_SETLK(cmd))
3643 timeout = nfs4_set_lock_task_retry(timeout);
3644 status = -ERESTARTSYS;
3647 } while(status < 0);
3651 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3653 struct nfs_server *server = NFS_SERVER(state->inode);
3654 struct nfs4_exception exception = { };
3657 err = nfs4_set_lock_state(state, fl);
3661 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3662 if (err != -NFS4ERR_DELAY)
3664 err = nfs4_handle_exception(server, err, &exception);
3665 } while (exception.retry);
3670 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3672 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3673 size_t buflen, int flags)
3675 struct inode *inode = dentry->d_inode;
3677 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3680 if (!S_ISREG(inode->i_mode) &&
3681 (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX))
3684 return nfs4_proc_set_acl(inode, buf, buflen);
3687 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3688 * and that's what we'll do for e.g. user attributes that haven't been set.
3689 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3690 * attributes in kernel-managed attribute namespaces. */
3691 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3694 struct inode *inode = dentry->d_inode;
3696 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3699 return nfs4_proc_get_acl(inode, buf, buflen);
3702 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3704 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
3706 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3708 if (buf && buflen < len)
3711 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3715 int nfs4_proc_fs_locations(struct inode *dir, struct dentry *dentry,
3716 struct nfs4_fs_locations *fs_locations, struct page *page)
3718 struct nfs_server *server = NFS_SERVER(dir);
3720 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3721 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
3723 struct nfs4_fs_locations_arg args = {
3724 .dir_fh = NFS_FH(dir),
3725 .name = &dentry->d_name,
3729 struct rpc_message msg = {
3730 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3732 .rpc_resp = fs_locations,
3736 dprintk("%s: start\n", __FUNCTION__);
3737 fs_locations->fattr.valid = 0;
3738 fs_locations->server = server;
3739 fs_locations->nlocations = 0;
3740 status = rpc_call_sync(server->client, &msg, 0);
3741 dprintk("%s: returned status = %d\n", __FUNCTION__, status);
3745 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3746 .recover_open = nfs4_open_reclaim,
3747 .recover_lock = nfs4_lock_reclaim,
3750 struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3751 .recover_open = nfs4_open_expired,
3752 .recover_lock = nfs4_lock_expired,
3755 static struct inode_operations nfs4_file_inode_operations = {
3756 .permission = nfs_permission,
3757 .getattr = nfs_getattr,
3758 .setattr = nfs_setattr,
3759 .getxattr = nfs4_getxattr,
3760 .setxattr = nfs4_setxattr,
3761 .listxattr = nfs4_listxattr,
3764 const struct nfs_rpc_ops nfs_v4_clientops = {
3765 .version = 4, /* protocol version */
3766 .dentry_ops = &nfs4_dentry_operations,
3767 .dir_inode_ops = &nfs4_dir_inode_operations,
3768 .file_inode_ops = &nfs4_file_inode_operations,
3769 .getroot = nfs4_proc_get_root,
3770 .getattr = nfs4_proc_getattr,
3771 .setattr = nfs4_proc_setattr,
3772 .lookupfh = nfs4_proc_lookupfh,
3773 .lookup = nfs4_proc_lookup,
3774 .access = nfs4_proc_access,
3775 .readlink = nfs4_proc_readlink,
3776 .read = nfs4_proc_read,
3777 .write = nfs4_proc_write,
3778 .commit = nfs4_proc_commit,
3779 .create = nfs4_proc_create,
3780 .remove = nfs4_proc_remove,
3781 .unlink_setup = nfs4_proc_unlink_setup,
3782 .unlink_done = nfs4_proc_unlink_done,
3783 .rename = nfs4_proc_rename,
3784 .link = nfs4_proc_link,
3785 .symlink = nfs4_proc_symlink,
3786 .mkdir = nfs4_proc_mkdir,
3787 .rmdir = nfs4_proc_remove,
3788 .readdir = nfs4_proc_readdir,
3789 .mknod = nfs4_proc_mknod,
3790 .statfs = nfs4_proc_statfs,
3791 .fsinfo = nfs4_proc_fsinfo,
3792 .pathconf = nfs4_proc_pathconf,
3793 .set_capabilities = nfs4_server_capabilities,
3794 .decode_dirent = nfs4_decode_dirent,
3795 .read_setup = nfs4_proc_read_setup,
3796 .read_done = nfs4_read_done,
3797 .write_setup = nfs4_proc_write_setup,
3798 .write_done = nfs4_write_done,
3799 .commit_setup = nfs4_proc_commit_setup,
3800 .commit_done = nfs4_commit_done,
3801 .file_open = nfs_open,
3802 .file_release = nfs_release,
3803 .lock = nfs4_proc_lock,
3804 .clear_acl_cache = nfs4_zap_acl_attr,