2 * linux/fs/nfsd/nfs4state.c
4 * Copyright (c) 2001 The Regents of the University of Michigan.
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <kandros@umich.edu>
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37 #include <linux/param.h>
38 #include <linux/major.h>
39 #include <linux/slab.h>
41 #include <linux/sunrpc/svc.h>
42 #include <linux/nfsd/nfsd.h>
43 #include <linux/nfsd/cache.h>
44 #include <linux/mount.h>
45 #include <linux/workqueue.h>
46 #include <linux/smp_lock.h>
47 #include <linux/kthread.h>
48 #include <linux/nfs4.h>
49 #include <linux/nfsd/state.h>
50 #include <linux/nfsd/xdr4.h>
51 #include <linux/namei.h>
52 #include <linux/mutex.h>
53 #include <linux/lockd/bind.h>
55 #define NFSDDBG_FACILITY NFSDDBG_PROC
58 static time_t lease_time = 90; /* default lease time */
59 static time_t user_lease_time = 90;
60 static time_t boot_time;
61 static int in_grace = 1;
62 static u32 current_clientid = 1;
63 static u32 current_ownerid = 1;
64 static u32 current_fileid = 1;
65 static u32 current_delegid = 1;
67 static stateid_t zerostateid; /* bits all 0 */
68 static stateid_t onestateid; /* bits all 1 */
70 #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t)))
71 #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t)))
73 /* forward declarations */
74 static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags);
75 static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid);
76 static void release_stateid_lockowners(struct nfs4_stateid *open_stp);
77 static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery";
78 static void nfs4_set_recdir(char *recdir);
83 * protects clientid_hashtbl[], clientstr_hashtbl[],
84 * unconfstr_hashtbl[], uncofid_hashtbl[].
86 static DEFINE_MUTEX(client_mutex);
88 static struct kmem_cache *stateowner_slab = NULL;
89 static struct kmem_cache *file_slab = NULL;
90 static struct kmem_cache *stateid_slab = NULL;
91 static struct kmem_cache *deleg_slab = NULL;
96 mutex_lock(&client_mutex);
100 nfs4_unlock_state(void)
102 mutex_unlock(&client_mutex);
106 opaque_hashval(const void *ptr, int nbytes)
108 unsigned char *cptr = (unsigned char *) ptr;
118 /* forward declarations */
119 static void release_stateowner(struct nfs4_stateowner *sop);
120 static void release_stateid(struct nfs4_stateid *stp, int flags);
126 /* recall_lock protects the del_recall_lru */
127 static DEFINE_SPINLOCK(recall_lock);
128 static struct list_head del_recall_lru;
131 free_nfs4_file(struct kref *kref)
133 struct nfs4_file *fp = container_of(kref, struct nfs4_file, fi_ref);
134 list_del(&fp->fi_hash);
136 kmem_cache_free(file_slab, fp);
140 put_nfs4_file(struct nfs4_file *fi)
142 kref_put(&fi->fi_ref, free_nfs4_file);
146 get_nfs4_file(struct nfs4_file *fi)
148 kref_get(&fi->fi_ref);
151 static int num_delegations;
154 * Open owner state (share locks)
157 /* hash tables for nfs4_stateowner */
158 #define OWNER_HASH_BITS 8
159 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
160 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
162 #define ownerid_hashval(id) \
163 ((id) & OWNER_HASH_MASK)
164 #define ownerstr_hashval(clientid, ownername) \
165 (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK)
167 static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE];
168 static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE];
170 /* hash table for nfs4_file */
171 #define FILE_HASH_BITS 8
172 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
173 #define FILE_HASH_MASK (FILE_HASH_SIZE - 1)
174 /* hash table for (open)nfs4_stateid */
175 #define STATEID_HASH_BITS 10
176 #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS)
177 #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1)
179 #define file_hashval(x) \
180 hash_ptr(x, FILE_HASH_BITS)
181 #define stateid_hashval(owner_id, file_id) \
182 (((owner_id) + (file_id)) & STATEID_HASH_MASK)
184 static struct list_head file_hashtbl[FILE_HASH_SIZE];
185 static struct list_head stateid_hashtbl[STATEID_HASH_SIZE];
187 static struct nfs4_delegation *
188 alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type)
190 struct nfs4_delegation *dp;
191 struct nfs4_file *fp = stp->st_file;
192 struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback;
194 dprintk("NFSD alloc_init_deleg\n");
195 if (num_delegations > STATEID_HASH_SIZE * 4)
197 dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL);
201 INIT_LIST_HEAD(&dp->dl_perfile);
202 INIT_LIST_HEAD(&dp->dl_perclnt);
203 INIT_LIST_HEAD(&dp->dl_recall_lru);
208 get_file(stp->st_vfs_file);
209 dp->dl_vfs_file = stp->st_vfs_file;
211 dp->dl_recall.cbr_dp = NULL;
212 dp->dl_recall.cbr_ident = cb->cb_ident;
213 dp->dl_recall.cbr_trunc = 0;
214 dp->dl_stateid.si_boot = boot_time;
215 dp->dl_stateid.si_stateownerid = current_delegid++;
216 dp->dl_stateid.si_fileid = 0;
217 dp->dl_stateid.si_generation = 0;
218 dp->dl_fhlen = current_fh->fh_handle.fh_size;
219 memcpy(dp->dl_fhval, ¤t_fh->fh_handle.fh_base,
220 current_fh->fh_handle.fh_size);
222 atomic_set(&dp->dl_count, 1);
223 list_add(&dp->dl_perfile, &fp->fi_delegations);
224 list_add(&dp->dl_perclnt, &clp->cl_delegations);
229 nfs4_put_delegation(struct nfs4_delegation *dp)
231 if (atomic_dec_and_test(&dp->dl_count)) {
232 dprintk("NFSD: freeing dp %p\n",dp);
233 put_nfs4_file(dp->dl_file);
234 kmem_cache_free(deleg_slab, dp);
239 /* Remove the associated file_lock first, then remove the delegation.
240 * lease_modify() is called to remove the FS_LEASE file_lock from
241 * the i_flock list, eventually calling nfsd's lock_manager
242 * fl_release_callback.
245 nfs4_close_delegation(struct nfs4_delegation *dp)
247 struct file *filp = dp->dl_vfs_file;
249 dprintk("NFSD: close_delegation dp %p\n",dp);
250 dp->dl_vfs_file = NULL;
251 /* The following nfsd_close may not actually close the file,
252 * but we want to remove the lease in any case. */
254 setlease(filp, F_UNLCK, &dp->dl_flock);
258 /* Called under the state lock. */
260 unhash_delegation(struct nfs4_delegation *dp)
262 list_del_init(&dp->dl_perfile);
263 list_del_init(&dp->dl_perclnt);
264 spin_lock(&recall_lock);
265 list_del_init(&dp->dl_recall_lru);
266 spin_unlock(&recall_lock);
267 nfs4_close_delegation(dp);
268 nfs4_put_delegation(dp);
275 /* Hash tables for nfs4_clientid state */
276 #define CLIENT_HASH_BITS 4
277 #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
278 #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
280 #define clientid_hashval(id) \
281 ((id) & CLIENT_HASH_MASK)
282 #define clientstr_hashval(name) \
283 (opaque_hashval((name), 8) & CLIENT_HASH_MASK)
285 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
286 * used in reboot/reset lease grace period processing
288 * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed
289 * setclientid_confirmed info.
291 * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed
294 * client_lru holds client queue ordered by nfs4_client.cl_time
297 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
298 * for last close replay.
300 static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE];
301 static int reclaim_str_hashtbl_size = 0;
302 static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE];
303 static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE];
304 static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE];
305 static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE];
306 static struct list_head client_lru;
307 static struct list_head close_lru;
310 renew_client(struct nfs4_client *clp)
313 * Move client to the end to the LRU list.
315 dprintk("renewing client (clientid %08x/%08x)\n",
316 clp->cl_clientid.cl_boot,
317 clp->cl_clientid.cl_id);
318 list_move_tail(&clp->cl_lru, &client_lru);
319 clp->cl_time = get_seconds();
322 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
324 STALE_CLIENTID(clientid_t *clid)
326 if (clid->cl_boot == boot_time)
328 dprintk("NFSD stale clientid (%08x/%08x)\n",
329 clid->cl_boot, clid->cl_id);
334 * XXX Should we use a slab cache ?
335 * This type of memory management is somewhat inefficient, but we use it
336 * anyway since SETCLIENTID is not a common operation.
338 static inline struct nfs4_client *
339 alloc_client(struct xdr_netobj name)
341 struct nfs4_client *clp;
343 if ((clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL))!= NULL) {
344 if ((clp->cl_name.data = kmalloc(name.len, GFP_KERNEL)) != NULL) {
345 memcpy(clp->cl_name.data, name.data, name.len);
346 clp->cl_name.len = name.len;
357 free_client(struct nfs4_client *clp)
359 if (clp->cl_cred.cr_group_info)
360 put_group_info(clp->cl_cred.cr_group_info);
361 kfree(clp->cl_name.data);
366 put_nfs4_client(struct nfs4_client *clp)
368 if (atomic_dec_and_test(&clp->cl_count))
373 shutdown_callback_client(struct nfs4_client *clp)
375 struct rpc_clnt *clnt = clp->cl_callback.cb_client;
377 /* shutdown rpc client, ending any outstanding recall rpcs */
379 clp->cl_callback.cb_client = NULL;
380 rpc_shutdown_client(clnt);
385 expire_client(struct nfs4_client *clp)
387 struct nfs4_stateowner *sop;
388 struct nfs4_delegation *dp;
389 struct list_head reaplist;
391 dprintk("NFSD: expire_client cl_count %d\n",
392 atomic_read(&clp->cl_count));
394 shutdown_callback_client(clp);
396 INIT_LIST_HEAD(&reaplist);
397 spin_lock(&recall_lock);
398 while (!list_empty(&clp->cl_delegations)) {
399 dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt);
400 dprintk("NFSD: expire client. dp %p, fp %p\n", dp,
402 list_del_init(&dp->dl_perclnt);
403 list_move(&dp->dl_recall_lru, &reaplist);
405 spin_unlock(&recall_lock);
406 while (!list_empty(&reaplist)) {
407 dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru);
408 list_del_init(&dp->dl_recall_lru);
409 unhash_delegation(dp);
411 list_del(&clp->cl_idhash);
412 list_del(&clp->cl_strhash);
413 list_del(&clp->cl_lru);
414 while (!list_empty(&clp->cl_openowners)) {
415 sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient);
416 release_stateowner(sop);
418 put_nfs4_client(clp);
421 static struct nfs4_client *
422 create_client(struct xdr_netobj name, char *recdir) {
423 struct nfs4_client *clp;
425 if (!(clp = alloc_client(name)))
427 memcpy(clp->cl_recdir, recdir, HEXDIR_LEN);
428 atomic_set(&clp->cl_count, 1);
429 atomic_set(&clp->cl_callback.cb_set, 0);
430 INIT_LIST_HEAD(&clp->cl_idhash);
431 INIT_LIST_HEAD(&clp->cl_strhash);
432 INIT_LIST_HEAD(&clp->cl_openowners);
433 INIT_LIST_HEAD(&clp->cl_delegations);
434 INIT_LIST_HEAD(&clp->cl_lru);
440 copy_verf(struct nfs4_client *target, nfs4_verifier *source) {
441 memcpy(target->cl_verifier.data, source->data, sizeof(target->cl_verifier.data));
445 copy_clid(struct nfs4_client *target, struct nfs4_client *source) {
446 target->cl_clientid.cl_boot = source->cl_clientid.cl_boot;
447 target->cl_clientid.cl_id = source->cl_clientid.cl_id;
451 copy_cred(struct svc_cred *target, struct svc_cred *source) {
453 target->cr_uid = source->cr_uid;
454 target->cr_gid = source->cr_gid;
455 target->cr_group_info = source->cr_group_info;
456 get_group_info(target->cr_group_info);
460 same_name(const char *n1, const char *n2) {
461 return 0 == memcmp(n1, n2, HEXDIR_LEN);
465 cmp_verf(nfs4_verifier *v1, nfs4_verifier *v2) {
466 return(!memcmp(v1->data,v2->data,sizeof(v1->data)));
470 cmp_clid(clientid_t * cl1, clientid_t * cl2) {
471 return((cl1->cl_boot == cl2->cl_boot) &&
472 (cl1->cl_id == cl2->cl_id));
475 /* XXX what about NGROUP */
477 cmp_creds(struct svc_cred *cr1, struct svc_cred *cr2){
478 return(cr1->cr_uid == cr2->cr_uid);
483 gen_clid(struct nfs4_client *clp) {
484 clp->cl_clientid.cl_boot = boot_time;
485 clp->cl_clientid.cl_id = current_clientid++;
489 gen_confirm(struct nfs4_client *clp) {
494 p = (u32 *)clp->cl_confirm.data;
500 check_name(struct xdr_netobj name) {
504 if (name.len > NFS4_OPAQUE_LIMIT) {
505 printk("NFSD: check_name: name too long(%d)!\n", name.len);
512 add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval)
514 unsigned int idhashval;
516 list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]);
517 idhashval = clientid_hashval(clp->cl_clientid.cl_id);
518 list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]);
519 list_add_tail(&clp->cl_lru, &client_lru);
520 clp->cl_time = get_seconds();
524 move_to_confirmed(struct nfs4_client *clp)
526 unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id);
527 unsigned int strhashval;
529 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp);
530 list_del_init(&clp->cl_strhash);
531 list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]);
532 strhashval = clientstr_hashval(clp->cl_recdir);
533 list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]);
537 static struct nfs4_client *
538 find_confirmed_client(clientid_t *clid)
540 struct nfs4_client *clp;
541 unsigned int idhashval = clientid_hashval(clid->cl_id);
543 list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) {
544 if (cmp_clid(&clp->cl_clientid, clid))
550 static struct nfs4_client *
551 find_unconfirmed_client(clientid_t *clid)
553 struct nfs4_client *clp;
554 unsigned int idhashval = clientid_hashval(clid->cl_id);
556 list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) {
557 if (cmp_clid(&clp->cl_clientid, clid))
563 static struct nfs4_client *
564 find_confirmed_client_by_str(const char *dname, unsigned int hashval)
566 struct nfs4_client *clp;
568 list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) {
569 if (same_name(clp->cl_recdir, dname))
575 static struct nfs4_client *
576 find_unconfirmed_client_by_str(const char *dname, unsigned int hashval)
578 struct nfs4_client *clp;
580 list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) {
581 if (same_name(clp->cl_recdir, dname))
587 /* a helper function for parse_callback */
589 parse_octet(unsigned int *lenp, char **addrp)
591 unsigned int len = *lenp;
603 if ((c < '0') || (c > '9')) {
609 n = (n * 10) + (c - '0');
620 /* parse and set the setclientid ipv4 callback address */
622 parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp)
627 u32 addrlen = addr_len;
628 char *addr = addr_val;
633 for(i = 4; i > 0 ; i--) {
634 if ((temp = parse_octet(&addrlen, &addr)) < 0) {
637 cbaddr |= (temp << shift);
645 for(i = 2; i > 0 ; i--) {
646 if ((temp = parse_octet(&addrlen, &addr)) < 0) {
649 cbport |= (temp << shift);
658 gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se)
660 struct nfs4_callback *cb = &clp->cl_callback;
662 /* Currently, we only support tcp for the callback channel */
663 if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3))
666 if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val,
667 &cb->cb_addr, &cb->cb_port)))
669 cb->cb_prog = se->se_callback_prog;
670 cb->cb_ident = se->se_callback_ident;
673 dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) "
674 "will not receive delegations\n",
675 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
681 * RFC 3010 has a complex implmentation description of processing a
682 * SETCLIENTID request consisting of 5 bullets, labeled as
683 * CASE0 - CASE4 below.
686 * callback information will be processed in a future patch
688 * an unconfirmed record is added when:
689 * NORMAL (part of CASE 4): there is no confirmed nor unconfirmed record.
690 * CASE 1: confirmed record found with matching name, principal,
691 * verifier, and clientid.
692 * CASE 2: confirmed record found with matching name, principal,
693 * and there is no unconfirmed record with matching
696 * an unconfirmed record is replaced when:
697 * CASE 3: confirmed record found with matching name, principal,
698 * and an unconfirmed record is found with matching
699 * name, principal, and with clientid and
700 * confirm that does not match the confirmed record.
701 * CASE 4: there is no confirmed record with matching name and
702 * principal. there is an unconfirmed record with
703 * matching name, principal.
705 * an unconfirmed record is deleted when:
706 * CASE 1: an unconfirmed record that matches input name, verifier,
707 * and confirmed clientid.
708 * CASE 4: any unconfirmed records with matching name and principal
709 * that exist after an unconfirmed record has been replaced
710 * as described above.
714 nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
715 struct nfsd4_setclientid *setclid)
717 struct sockaddr_in *sin = svc_addr_in(rqstp);
718 struct xdr_netobj clname = {
719 .len = setclid->se_namelen,
720 .data = setclid->se_name,
722 nfs4_verifier clverifier = setclid->se_verf;
723 unsigned int strhashval;
724 struct nfs4_client *conf, *unconf, *new;
726 char dname[HEXDIR_LEN];
728 if (!check_name(clname))
731 status = nfs4_make_rec_clidname(dname, &clname);
736 * XXX The Duplicate Request Cache (DRC) has been checked (??)
737 * We get here on a DRC miss.
740 strhashval = clientstr_hashval(dname);
743 conf = find_confirmed_client_by_str(dname, strhashval);
747 * clname match, confirmed, different principal
748 * or different ip_address
750 status = nfserr_clid_inuse;
751 if (!cmp_creds(&conf->cl_cred, &rqstp->rq_cred)
752 || conf->cl_addr != sin->sin_addr.s_addr) {
753 dprintk("NFSD: setclientid: string in use by client"
754 "at %u.%u.%u.%u\n", NIPQUAD(conf->cl_addr));
758 unconf = find_unconfirmed_client_by_str(dname, strhashval);
759 status = nfserr_resource;
763 * placed first, because it is the normal case.
766 expire_client(unconf);
767 new = create_client(clname, dname);
770 copy_verf(new, &clverifier);
771 new->cl_addr = sin->sin_addr.s_addr;
772 copy_cred(&new->cl_cred,&rqstp->rq_cred);
775 gen_callback(new, setclid);
776 add_to_unconfirmed(new, strhashval);
777 } else if (cmp_verf(&conf->cl_verifier, &clverifier)) {
780 * cl_name match, confirmed, principal match
781 * verifier match: probable callback update
783 * remove any unconfirmed nfs4_client with
784 * matching cl_name, cl_verifier, and cl_clientid
786 * create and insert an unconfirmed nfs4_client with same
787 * cl_name, cl_verifier, and cl_clientid as existing
788 * nfs4_client, but with the new callback info and a
792 /* Note this is removing unconfirmed {*x***},
793 * which is stronger than RFC recommended {vxc**}.
794 * This has the advantage that there is at most
795 * one {*x***} in either list at any time.
797 expire_client(unconf);
799 new = create_client(clname, dname);
802 copy_verf(new,&conf->cl_verifier);
803 new->cl_addr = sin->sin_addr.s_addr;
804 copy_cred(&new->cl_cred,&rqstp->rq_cred);
805 copy_clid(new, conf);
807 gen_callback(new, setclid);
808 add_to_unconfirmed(new,strhashval);
809 } else if (!unconf) {
812 * clname match, confirmed, principal match
813 * verfier does not match
814 * no unconfirmed. create a new unconfirmed nfs4_client
815 * using input clverifier, clname, and callback info
816 * and generate a new cl_clientid and cl_confirm.
818 new = create_client(clname, dname);
821 copy_verf(new,&clverifier);
822 new->cl_addr = sin->sin_addr.s_addr;
823 copy_cred(&new->cl_cred,&rqstp->rq_cred);
826 gen_callback(new, setclid);
827 add_to_unconfirmed(new, strhashval);
828 } else if (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm)) {
831 * confirmed found (name, principal match)
832 * confirmed verifier does not match input clverifier
834 * unconfirmed found (name match)
835 * confirmed->cl_confirm != unconfirmed->cl_confirm
837 * remove unconfirmed.
839 * create an unconfirmed nfs4_client
840 * with same cl_name as existing confirmed nfs4_client,
841 * but with new callback info, new cl_clientid,
842 * new cl_verifier and a new cl_confirm
844 expire_client(unconf);
845 new = create_client(clname, dname);
848 copy_verf(new,&clverifier);
849 new->cl_addr = sin->sin_addr.s_addr;
850 copy_cred(&new->cl_cred,&rqstp->rq_cred);
853 gen_callback(new, setclid);
854 add_to_unconfirmed(new, strhashval);
856 /* No cases hit !!! */
857 status = nfserr_inval;
861 setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot;
862 setclid->se_clientid.cl_id = new->cl_clientid.cl_id;
863 memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data));
872 * RFC 3010 has a complex implmentation description of processing a
873 * SETCLIENTID_CONFIRM request consisting of 4 bullets describing
874 * processing on a DRC miss, labeled as CASE1 - CASE4 below.
876 * NOTE: callback information will be processed here in a future patch
879 nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
880 struct nfsd4_compound_state *cstate,
881 struct nfsd4_setclientid_confirm *setclientid_confirm)
883 struct sockaddr_in *sin = svc_addr_in(rqstp);
884 struct nfs4_client *conf, *unconf;
885 nfs4_verifier confirm = setclientid_confirm->sc_confirm;
886 clientid_t * clid = &setclientid_confirm->sc_clientid;
889 if (STALE_CLIENTID(clid))
890 return nfserr_stale_clientid;
892 * XXX The Duplicate Request Cache (DRC) has been checked (??)
893 * We get here on a DRC miss.
898 conf = find_confirmed_client(clid);
899 unconf = find_unconfirmed_client(clid);
901 status = nfserr_clid_inuse;
902 if (conf && conf->cl_addr != sin->sin_addr.s_addr)
904 if (unconf && unconf->cl_addr != sin->sin_addr.s_addr)
907 if ((conf && unconf) &&
908 (cmp_verf(&unconf->cl_confirm, &confirm)) &&
909 (cmp_verf(&conf->cl_verifier, &unconf->cl_verifier)) &&
910 (same_name(conf->cl_recdir,unconf->cl_recdir)) &&
911 (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm))) {
913 * unconf record that matches input clientid and input confirm.
914 * conf record that matches input clientid.
915 * conf and unconf records match names, verifiers
917 if (!cmp_creds(&conf->cl_cred, &unconf->cl_cred))
918 status = nfserr_clid_inuse;
920 /* XXX: We just turn off callbacks until we can handle
921 * change request correctly. */
922 atomic_set(&conf->cl_callback.cb_set, 0);
924 nfsd4_remove_clid_dir(unconf);
925 expire_client(unconf);
929 } else if ((conf && !unconf) ||
931 (!cmp_verf(&conf->cl_verifier, &unconf->cl_verifier) ||
932 !same_name(conf->cl_recdir, unconf->cl_recdir)))) {
934 * conf record that matches input clientid.
935 * if unconf record matches input clientid, then
936 * unconf->cl_name or unconf->cl_verifier don't match the
939 if (!cmp_creds(&conf->cl_cred,&rqstp->rq_cred))
940 status = nfserr_clid_inuse;
943 } else if (!conf && unconf
944 && cmp_verf(&unconf->cl_confirm, &confirm)) {
946 * conf record not found.
947 * unconf record found.
948 * unconf->cl_confirm matches input confirm
950 if (!cmp_creds(&unconf->cl_cred, &rqstp->rq_cred)) {
951 status = nfserr_clid_inuse;
954 clientstr_hashval(unconf->cl_recdir);
955 conf = find_confirmed_client_by_str(unconf->cl_recdir,
958 nfsd4_remove_clid_dir(conf);
961 move_to_confirmed(unconf);
965 } else if ((!conf || (conf && !cmp_verf(&conf->cl_confirm, &confirm)))
966 && (!unconf || (unconf && !cmp_verf(&unconf->cl_confirm,
969 * conf record not found, or if conf, conf->cl_confirm does not
970 * match input confirm.
971 * unconf record not found, or if unconf, unconf->cl_confirm
972 * does not match input confirm.
974 status = nfserr_stale_clientid;
976 /* check that we have hit one of the cases...*/
977 status = nfserr_clid_inuse;
981 nfsd4_probe_callback(conf);
986 /* OPEN Share state helper functions */
987 static inline struct nfs4_file *
988 alloc_init_file(struct inode *ino)
990 struct nfs4_file *fp;
991 unsigned int hashval = file_hashval(ino);
993 fp = kmem_cache_alloc(file_slab, GFP_KERNEL);
995 kref_init(&fp->fi_ref);
996 INIT_LIST_HEAD(&fp->fi_hash);
997 INIT_LIST_HEAD(&fp->fi_stateids);
998 INIT_LIST_HEAD(&fp->fi_delegations);
999 list_add(&fp->fi_hash, &file_hashtbl[hashval]);
1000 fp->fi_inode = igrab(ino);
1001 fp->fi_id = current_fileid++;
1008 nfsd4_free_slab(struct kmem_cache **slab)
1012 kmem_cache_destroy(*slab);
1017 nfsd4_free_slabs(void)
1019 nfsd4_free_slab(&stateowner_slab);
1020 nfsd4_free_slab(&file_slab);
1021 nfsd4_free_slab(&stateid_slab);
1022 nfsd4_free_slab(&deleg_slab);
1026 nfsd4_init_slabs(void)
1028 stateowner_slab = kmem_cache_create("nfsd4_stateowners",
1029 sizeof(struct nfs4_stateowner), 0, 0, NULL, NULL);
1030 if (stateowner_slab == NULL)
1032 file_slab = kmem_cache_create("nfsd4_files",
1033 sizeof(struct nfs4_file), 0, 0, NULL, NULL);
1034 if (file_slab == NULL)
1036 stateid_slab = kmem_cache_create("nfsd4_stateids",
1037 sizeof(struct nfs4_stateid), 0, 0, NULL, NULL);
1038 if (stateid_slab == NULL)
1040 deleg_slab = kmem_cache_create("nfsd4_delegations",
1041 sizeof(struct nfs4_delegation), 0, 0, NULL, NULL);
1042 if (deleg_slab == NULL)
1047 dprintk("nfsd4: out of memory while initializing nfsv4\n");
1052 nfs4_free_stateowner(struct kref *kref)
1054 struct nfs4_stateowner *sop =
1055 container_of(kref, struct nfs4_stateowner, so_ref);
1056 kfree(sop->so_owner.data);
1057 kmem_cache_free(stateowner_slab, sop);
1060 static inline struct nfs4_stateowner *
1061 alloc_stateowner(struct xdr_netobj *owner)
1063 struct nfs4_stateowner *sop;
1065 if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) {
1066 if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) {
1067 memcpy(sop->so_owner.data, owner->data, owner->len);
1068 sop->so_owner.len = owner->len;
1069 kref_init(&sop->so_ref);
1072 kmem_cache_free(stateowner_slab, sop);
1077 static struct nfs4_stateowner *
1078 alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) {
1079 struct nfs4_stateowner *sop;
1080 struct nfs4_replay *rp;
1081 unsigned int idhashval;
1083 if (!(sop = alloc_stateowner(&open->op_owner)))
1085 idhashval = ownerid_hashval(current_ownerid);
1086 INIT_LIST_HEAD(&sop->so_idhash);
1087 INIT_LIST_HEAD(&sop->so_strhash);
1088 INIT_LIST_HEAD(&sop->so_perclient);
1089 INIT_LIST_HEAD(&sop->so_stateids);
1090 INIT_LIST_HEAD(&sop->so_perstateid); /* not used */
1091 INIT_LIST_HEAD(&sop->so_close_lru);
1093 list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]);
1094 list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]);
1095 list_add(&sop->so_perclient, &clp->cl_openowners);
1096 sop->so_is_open_owner = 1;
1097 sop->so_id = current_ownerid++;
1098 sop->so_client = clp;
1099 sop->so_seqid = open->op_seqid;
1100 sop->so_confirmed = 0;
1101 rp = &sop->so_replay;
1102 rp->rp_status = nfserr_serverfault;
1104 rp->rp_buf = rp->rp_ibuf;
1109 release_stateid_lockowners(struct nfs4_stateid *open_stp)
1111 struct nfs4_stateowner *lock_sop;
1113 while (!list_empty(&open_stp->st_lockowners)) {
1114 lock_sop = list_entry(open_stp->st_lockowners.next,
1115 struct nfs4_stateowner, so_perstateid);
1116 /* list_del(&open_stp->st_lockowners); */
1117 BUG_ON(lock_sop->so_is_open_owner);
1118 release_stateowner(lock_sop);
1123 unhash_stateowner(struct nfs4_stateowner *sop)
1125 struct nfs4_stateid *stp;
1127 list_del(&sop->so_idhash);
1128 list_del(&sop->so_strhash);
1129 if (sop->so_is_open_owner)
1130 list_del(&sop->so_perclient);
1131 list_del(&sop->so_perstateid);
1132 while (!list_empty(&sop->so_stateids)) {
1133 stp = list_entry(sop->so_stateids.next,
1134 struct nfs4_stateid, st_perstateowner);
1135 if (sop->so_is_open_owner)
1136 release_stateid(stp, OPEN_STATE);
1138 release_stateid(stp, LOCK_STATE);
1143 release_stateowner(struct nfs4_stateowner *sop)
1145 unhash_stateowner(sop);
1146 list_del(&sop->so_close_lru);
1147 nfs4_put_stateowner(sop);
1151 init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) {
1152 struct nfs4_stateowner *sop = open->op_stateowner;
1153 unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id);
1155 INIT_LIST_HEAD(&stp->st_hash);
1156 INIT_LIST_HEAD(&stp->st_perstateowner);
1157 INIT_LIST_HEAD(&stp->st_lockowners);
1158 INIT_LIST_HEAD(&stp->st_perfile);
1159 list_add(&stp->st_hash, &stateid_hashtbl[hashval]);
1160 list_add(&stp->st_perstateowner, &sop->so_stateids);
1161 list_add(&stp->st_perfile, &fp->fi_stateids);
1162 stp->st_stateowner = sop;
1165 stp->st_stateid.si_boot = boot_time;
1166 stp->st_stateid.si_stateownerid = sop->so_id;
1167 stp->st_stateid.si_fileid = fp->fi_id;
1168 stp->st_stateid.si_generation = 0;
1169 stp->st_access_bmap = 0;
1170 stp->st_deny_bmap = 0;
1171 __set_bit(open->op_share_access, &stp->st_access_bmap);
1172 __set_bit(open->op_share_deny, &stp->st_deny_bmap);
1173 stp->st_openstp = NULL;
1177 release_stateid(struct nfs4_stateid *stp, int flags)
1179 struct file *filp = stp->st_vfs_file;
1181 list_del(&stp->st_hash);
1182 list_del(&stp->st_perfile);
1183 list_del(&stp->st_perstateowner);
1184 if (flags & OPEN_STATE) {
1185 release_stateid_lockowners(stp);
1186 stp->st_vfs_file = NULL;
1188 } else if (flags & LOCK_STATE)
1189 locks_remove_posix(filp, (fl_owner_t) stp->st_stateowner);
1190 put_nfs4_file(stp->st_file);
1191 kmem_cache_free(stateid_slab, stp);
1195 move_to_close_lru(struct nfs4_stateowner *sop)
1197 dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop);
1199 list_move_tail(&sop->so_close_lru, &close_lru);
1200 sop->so_time = get_seconds();
1204 cmp_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, clientid_t *clid) {
1205 return ((sop->so_owner.len == owner->len) &&
1206 !memcmp(sop->so_owner.data, owner->data, owner->len) &&
1207 (sop->so_client->cl_clientid.cl_id == clid->cl_id));
1210 static struct nfs4_stateowner *
1211 find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open)
1213 struct nfs4_stateowner *so = NULL;
1215 list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) {
1216 if (cmp_owner_str(so, &open->op_owner, &open->op_clientid))
1222 /* search file_hashtbl[] for file */
1223 static struct nfs4_file *
1224 find_file(struct inode *ino)
1226 unsigned int hashval = file_hashval(ino);
1227 struct nfs4_file *fp;
1229 list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) {
1230 if (fp->fi_inode == ino) {
1238 static int access_valid(u32 x)
1240 return (x > 0 && x < 4);
1243 static int deny_valid(u32 x)
1245 return (x >= 0 && x < 5);
1249 set_access(unsigned int *access, unsigned long bmap) {
1253 for (i = 1; i < 4; i++) {
1254 if (test_bit(i, &bmap))
1260 set_deny(unsigned int *deny, unsigned long bmap) {
1264 for (i = 0; i < 4; i++) {
1265 if (test_bit(i, &bmap))
1271 test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) {
1272 unsigned int access, deny;
1274 set_access(&access, stp->st_access_bmap);
1275 set_deny(&deny, stp->st_deny_bmap);
1276 if ((access & open->op_share_deny) || (deny & open->op_share_access))
1282 * Called to check deny when READ with all zero stateid or
1283 * WRITE with all zero or all one stateid
1286 nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type)
1288 struct inode *ino = current_fh->fh_dentry->d_inode;
1289 struct nfs4_file *fp;
1290 struct nfs4_stateid *stp;
1293 dprintk("NFSD: nfs4_share_conflict\n");
1295 fp = find_file(ino);
1298 ret = nfserr_locked;
1299 /* Search for conflicting share reservations */
1300 list_for_each_entry(stp, &fp->fi_stateids, st_perfile) {
1301 if (test_bit(deny_type, &stp->st_deny_bmap) ||
1302 test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap))
1312 nfs4_file_downgrade(struct file *filp, unsigned int share_access)
1314 if (share_access & NFS4_SHARE_ACCESS_WRITE) {
1315 put_write_access(filp->f_path.dentry->d_inode);
1316 filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE;
1321 * Recall a delegation
1324 do_recall(void *__dp)
1326 struct nfs4_delegation *dp = __dp;
1328 nfsd4_cb_recall(dp);
1333 * Spawn a thread to perform a recall on the delegation represented
1334 * by the lease (file_lock)
1336 * Called from break_lease() with lock_kernel() held.
1337 * Note: we assume break_lease will only call this *once* for any given
1341 void nfsd_break_deleg_cb(struct file_lock *fl)
1343 struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner;
1344 struct task_struct *t;
1346 dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl);
1350 /* We're assuming the state code never drops its reference
1351 * without first removing the lease. Since we're in this lease
1352 * callback (and since the lease code is serialized by the kernel
1353 * lock) we know the server hasn't removed the lease yet, we know
1354 * it's safe to take a reference: */
1355 atomic_inc(&dp->dl_count);
1357 spin_lock(&recall_lock);
1358 list_add_tail(&dp->dl_recall_lru, &del_recall_lru);
1359 spin_unlock(&recall_lock);
1361 /* only place dl_time is set. protected by lock_kernel*/
1362 dp->dl_time = get_seconds();
1364 /* XXX need to merge NFSD_LEASE_TIME with fs/locks.c:lease_break_time */
1365 fl->fl_break_time = jiffies + NFSD_LEASE_TIME * HZ;
1367 t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall");
1369 struct nfs4_client *clp = dp->dl_client;
1371 printk(KERN_INFO "NFSD: Callback thread failed for "
1372 "for client (clientid %08x/%08x)\n",
1373 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
1374 nfs4_put_delegation(dp);
1379 * The file_lock is being reapd.
1381 * Called by locks_free_lock() with lock_kernel() held.
1384 void nfsd_release_deleg_cb(struct file_lock *fl)
1386 struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner;
1388 dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count));
1390 if (!(fl->fl_flags & FL_LEASE) || !dp)
1392 dp->dl_flock = NULL;
1396 * Set the delegation file_lock back pointer.
1398 * Called from __setlease() with lock_kernel() held.
1401 void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl)
1403 struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner;
1405 dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp);
1412 * Called from __setlease() with lock_kernel() held
1415 int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try)
1417 struct nfs4_delegation *onlistd =
1418 (struct nfs4_delegation *)onlist->fl_owner;
1419 struct nfs4_delegation *tryd =
1420 (struct nfs4_delegation *)try->fl_owner;
1422 if (onlist->fl_lmops != try->fl_lmops)
1425 return onlistd->dl_client == tryd->dl_client;
1430 int nfsd_change_deleg_cb(struct file_lock **onlist, int arg)
1433 return lease_modify(onlist, arg);
1438 static struct lock_manager_operations nfsd_lease_mng_ops = {
1439 .fl_break = nfsd_break_deleg_cb,
1440 .fl_release_private = nfsd_release_deleg_cb,
1441 .fl_copy_lock = nfsd_copy_lock_deleg_cb,
1442 .fl_mylease = nfsd_same_client_deleg_cb,
1443 .fl_change = nfsd_change_deleg_cb,
1448 nfsd4_process_open1(struct nfsd4_open *open)
1450 clientid_t *clientid = &open->op_clientid;
1451 struct nfs4_client *clp = NULL;
1452 unsigned int strhashval;
1453 struct nfs4_stateowner *sop = NULL;
1455 if (!check_name(open->op_owner))
1456 return nfserr_inval;
1458 if (STALE_CLIENTID(&open->op_clientid))
1459 return nfserr_stale_clientid;
1461 strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner);
1462 sop = find_openstateowner_str(strhashval, open);
1463 open->op_stateowner = sop;
1465 /* Make sure the client's lease hasn't expired. */
1466 clp = find_confirmed_client(clientid);
1468 return nfserr_expired;
1471 if (!sop->so_confirmed) {
1472 /* Replace unconfirmed owners without checking for replay. */
1473 clp = sop->so_client;
1474 release_stateowner(sop);
1475 open->op_stateowner = NULL;
1478 if (open->op_seqid == sop->so_seqid - 1) {
1479 if (sop->so_replay.rp_buflen)
1480 return nfserr_replay_me;
1481 /* The original OPEN failed so spectacularly
1482 * that we don't even have replay data saved!
1483 * Therefore, we have no choice but to continue
1484 * processing this OPEN; presumably, we'll
1485 * fail again for the same reason.
1487 dprintk("nfsd4_process_open1: replay with no replay cache\n");
1490 if (open->op_seqid != sop->so_seqid)
1491 return nfserr_bad_seqid;
1493 if (open->op_stateowner == NULL) {
1494 sop = alloc_init_open_stateowner(strhashval, clp, open);
1496 return nfserr_resource;
1497 open->op_stateowner = sop;
1499 list_del_init(&sop->so_close_lru);
1500 renew_client(sop->so_client);
1504 static inline __be32
1505 nfs4_check_delegmode(struct nfs4_delegation *dp, int flags)
1507 if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ))
1508 return nfserr_openmode;
1513 static struct nfs4_delegation *
1514 find_delegation_file(struct nfs4_file *fp, stateid_t *stid)
1516 struct nfs4_delegation *dp;
1518 list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) {
1519 if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid)
1526 nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open,
1527 struct nfs4_delegation **dp)
1530 __be32 status = nfserr_bad_stateid;
1532 *dp = find_delegation_file(fp, &open->op_delegate_stateid);
1535 flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ?
1536 RD_STATE : WR_STATE;
1537 status = nfs4_check_delegmode(*dp, flags);
1541 if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR)
1545 open->op_stateowner->so_confirmed = 1;
1550 nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp)
1552 struct nfs4_stateid *local;
1553 __be32 status = nfserr_share_denied;
1554 struct nfs4_stateowner *sop = open->op_stateowner;
1556 list_for_each_entry(local, &fp->fi_stateids, st_perfile) {
1557 /* ignore lock owners */
1558 if (local->st_stateowner->so_is_open_owner == 0)
1560 /* remember if we have seen this open owner */
1561 if (local->st_stateowner == sop)
1563 /* check for conflicting share reservations */
1564 if (!test_share(local, open))
1572 static inline struct nfs4_stateid *
1573 nfs4_alloc_stateid(void)
1575 return kmem_cache_alloc(stateid_slab, GFP_KERNEL);
1579 nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp,
1580 struct nfs4_delegation *dp,
1581 struct svc_fh *cur_fh, int flags)
1583 struct nfs4_stateid *stp;
1585 stp = nfs4_alloc_stateid();
1587 return nfserr_resource;
1590 get_file(dp->dl_vfs_file);
1591 stp->st_vfs_file = dp->dl_vfs_file;
1594 status = nfsd_open(rqstp, cur_fh, S_IFREG, flags,
1597 if (status == nfserr_dropit)
1598 status = nfserr_jukebox;
1599 kmem_cache_free(stateid_slab, stp);
1607 static inline __be32
1608 nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh,
1609 struct nfsd4_open *open)
1611 struct iattr iattr = {
1612 .ia_valid = ATTR_SIZE,
1615 if (!open->op_truncate)
1617 if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
1618 return nfserr_inval;
1619 return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0);
1623 nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open)
1625 struct file *filp = stp->st_vfs_file;
1626 struct inode *inode = filp->f_path.dentry->d_inode;
1627 unsigned int share_access, new_writer;
1630 set_access(&share_access, stp->st_access_bmap);
1631 new_writer = (~share_access) & open->op_share_access
1632 & NFS4_SHARE_ACCESS_WRITE;
1635 int err = get_write_access(inode);
1637 return nfserrno(err);
1639 status = nfsd4_truncate(rqstp, cur_fh, open);
1642 put_write_access(inode);
1645 /* remember the open */
1646 filp->f_mode |= open->op_share_access;
1647 set_bit(open->op_share_access, &stp->st_access_bmap);
1648 set_bit(open->op_share_deny, &stp->st_deny_bmap);
1655 nfs4_set_claim_prev(struct nfsd4_open *open)
1657 open->op_stateowner->so_confirmed = 1;
1658 open->op_stateowner->so_client->cl_firststate = 1;
1662 * Attempt to hand out a delegation.
1665 nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp)
1667 struct nfs4_delegation *dp;
1668 struct nfs4_stateowner *sop = stp->st_stateowner;
1669 struct nfs4_callback *cb = &sop->so_client->cl_callback;
1670 struct file_lock fl, *flp = &fl;
1671 int status, flag = 0;
1673 flag = NFS4_OPEN_DELEGATE_NONE;
1674 open->op_recall = 0;
1675 switch (open->op_claim_type) {
1676 case NFS4_OPEN_CLAIM_PREVIOUS:
1677 if (!atomic_read(&cb->cb_set))
1678 open->op_recall = 1;
1679 flag = open->op_delegate_type;
1680 if (flag == NFS4_OPEN_DELEGATE_NONE)
1683 case NFS4_OPEN_CLAIM_NULL:
1684 /* Let's not give out any delegations till everyone's
1685 * had the chance to reclaim theirs.... */
1686 if (nfs4_in_grace())
1688 if (!atomic_read(&cb->cb_set) || !sop->so_confirmed)
1690 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
1691 flag = NFS4_OPEN_DELEGATE_WRITE;
1693 flag = NFS4_OPEN_DELEGATE_READ;
1699 dp = alloc_init_deleg(sop->so_client, stp, fh, flag);
1701 flag = NFS4_OPEN_DELEGATE_NONE;
1704 locks_init_lock(&fl);
1705 fl.fl_lmops = &nfsd_lease_mng_ops;
1706 fl.fl_flags = FL_LEASE;
1707 fl.fl_end = OFFSET_MAX;
1708 fl.fl_owner = (fl_owner_t)dp;
1709 fl.fl_file = stp->st_vfs_file;
1710 fl.fl_pid = current->tgid;
1712 /* setlease checks to see if delegation should be handed out.
1713 * the lock_manager callbacks fl_mylease and fl_change are used
1715 if ((status = setlease(stp->st_vfs_file,
1716 flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK, &flp))) {
1717 dprintk("NFSD: setlease failed [%d], no delegation\n", status);
1718 unhash_delegation(dp);
1719 flag = NFS4_OPEN_DELEGATE_NONE;
1723 memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid));
1725 dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n",
1726 dp->dl_stateid.si_boot,
1727 dp->dl_stateid.si_stateownerid,
1728 dp->dl_stateid.si_fileid,
1729 dp->dl_stateid.si_generation);
1731 if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS
1732 && flag == NFS4_OPEN_DELEGATE_NONE
1733 && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE)
1734 printk("NFSD: WARNING: refusing delegation reclaim\n");
1735 open->op_delegate_type = flag;
1739 * called with nfs4_lock_state() held.
1742 nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
1744 struct nfs4_file *fp = NULL;
1745 struct inode *ino = current_fh->fh_dentry->d_inode;
1746 struct nfs4_stateid *stp = NULL;
1747 struct nfs4_delegation *dp = NULL;
1750 status = nfserr_inval;
1751 if (!access_valid(open->op_share_access)
1752 || !deny_valid(open->op_share_deny))
1755 * Lookup file; if found, lookup stateid and check open request,
1756 * and check for delegations in the process of being recalled.
1757 * If not found, create the nfs4_file struct
1759 fp = find_file(ino);
1761 if ((status = nfs4_check_open(fp, open, &stp)))
1763 status = nfs4_check_deleg(fp, open, &dp);
1767 status = nfserr_bad_stateid;
1768 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
1770 status = nfserr_resource;
1771 fp = alloc_init_file(ino);
1777 * OPEN the file, or upgrade an existing OPEN.
1778 * If truncate fails, the OPEN fails.
1781 /* Stateid was found, this is an OPEN upgrade */
1782 status = nfs4_upgrade_open(rqstp, current_fh, stp, open);
1785 update_stateid(&stp->st_stateid);
1787 /* Stateid was not found, this is a new OPEN */
1789 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
1791 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
1793 status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags);
1796 init_stateid(stp, fp, open);
1797 status = nfsd4_truncate(rqstp, current_fh, open);
1799 release_stateid(stp, OPEN_STATE);
1803 memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t));
1806 * Attempt to hand out a delegation. No error return, because the
1807 * OPEN succeeds even if we fail.
1809 nfs4_open_delegation(current_fh, open, stp);
1813 dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n",
1814 stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid,
1815 stp->st_stateid.si_fileid, stp->st_stateid.si_generation);
1819 if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
1820 nfs4_set_claim_prev(open);
1822 * To finish the open response, we just need to set the rflags.
1824 open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX;
1825 if (!open->op_stateowner->so_confirmed)
1826 open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM;
1831 static struct workqueue_struct *laundry_wq;
1832 static void laundromat_main(struct work_struct *);
1833 static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main);
1836 nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1839 struct nfs4_client *clp;
1843 dprintk("process_renew(%08x/%08x): starting\n",
1844 clid->cl_boot, clid->cl_id);
1845 status = nfserr_stale_clientid;
1846 if (STALE_CLIENTID(clid))
1848 clp = find_confirmed_client(clid);
1849 status = nfserr_expired;
1851 /* We assume the client took too long to RENEW. */
1852 dprintk("nfsd4_renew: clientid not found!\n");
1856 status = nfserr_cb_path_down;
1857 if (!list_empty(&clp->cl_delegations)
1858 && !atomic_read(&clp->cl_callback.cb_set))
1862 nfs4_unlock_state();
1869 dprintk("NFSD: end of grace period\n");
1870 nfsd4_recdir_purge_old();
1875 nfs4_laundromat(void)
1877 struct nfs4_client *clp;
1878 struct nfs4_stateowner *sop;
1879 struct nfs4_delegation *dp;
1880 struct list_head *pos, *next, reaplist;
1881 time_t cutoff = get_seconds() - NFSD_LEASE_TIME;
1882 time_t t, clientid_val = NFSD_LEASE_TIME;
1883 time_t u, test_val = NFSD_LEASE_TIME;
1887 dprintk("NFSD: laundromat service - starting\n");
1890 list_for_each_safe(pos, next, &client_lru) {
1891 clp = list_entry(pos, struct nfs4_client, cl_lru);
1892 if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) {
1893 t = clp->cl_time - cutoff;
1894 if (clientid_val > t)
1898 dprintk("NFSD: purging unused client (clientid %08x)\n",
1899 clp->cl_clientid.cl_id);
1900 nfsd4_remove_clid_dir(clp);
1903 INIT_LIST_HEAD(&reaplist);
1904 spin_lock(&recall_lock);
1905 list_for_each_safe(pos, next, &del_recall_lru) {
1906 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
1907 if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) {
1908 u = dp->dl_time - cutoff;
1913 dprintk("NFSD: purging unused delegation dp %p, fp %p\n",
1915 list_move(&dp->dl_recall_lru, &reaplist);
1917 spin_unlock(&recall_lock);
1918 list_for_each_safe(pos, next, &reaplist) {
1919 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
1920 list_del_init(&dp->dl_recall_lru);
1921 unhash_delegation(dp);
1923 test_val = NFSD_LEASE_TIME;
1924 list_for_each_safe(pos, next, &close_lru) {
1925 sop = list_entry(pos, struct nfs4_stateowner, so_close_lru);
1926 if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) {
1927 u = sop->so_time - cutoff;
1932 dprintk("NFSD: purging unused open stateowner (so_id %d)\n",
1934 release_stateowner(sop);
1936 if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT)
1937 clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT;
1938 nfs4_unlock_state();
1939 return clientid_val;
1943 laundromat_main(struct work_struct *not_used)
1947 t = nfs4_laundromat();
1948 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t);
1949 queue_delayed_work(laundry_wq, &laundromat_work, t*HZ);
1952 static struct nfs4_stateowner *
1953 search_close_lru(u32 st_id, int flags)
1955 struct nfs4_stateowner *local = NULL;
1957 if (flags & CLOSE_STATE) {
1958 list_for_each_entry(local, &close_lru, so_close_lru) {
1959 if (local->so_id == st_id)
1967 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp)
1969 return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode;
1973 STALE_STATEID(stateid_t *stateid)
1975 if (stateid->si_boot == boot_time)
1977 dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n",
1978 stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid,
1979 stateid->si_generation);
1984 access_permit_read(unsigned long access_bmap)
1986 return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) ||
1987 test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) ||
1988 test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap);
1992 access_permit_write(unsigned long access_bmap)
1994 return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) ||
1995 test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap);
1999 __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags)
2001 __be32 status = nfserr_openmode;
2003 if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap)))
2005 if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap)))
2012 static inline __be32
2013 check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags)
2015 /* Trying to call delegreturn with a special stateid? Yuch: */
2016 if (!(flags & (RD_STATE | WR_STATE)))
2017 return nfserr_bad_stateid;
2018 else if (ONE_STATEID(stateid) && (flags & RD_STATE))
2020 else if (nfs4_in_grace()) {
2021 /* Answer in remaining cases depends on existance of
2022 * conflicting state; so we must wait out the grace period. */
2023 return nfserr_grace;
2024 } else if (flags & WR_STATE)
2025 return nfs4_share_conflict(current_fh,
2026 NFS4_SHARE_DENY_WRITE);
2027 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
2028 return nfs4_share_conflict(current_fh,
2029 NFS4_SHARE_DENY_READ);
2033 * Allow READ/WRITE during grace period on recovered state only for files
2034 * that are not able to provide mandatory locking.
2037 io_during_grace_disallowed(struct inode *inode, int flags)
2039 return nfs4_in_grace() && (flags & (RD_STATE | WR_STATE))
2040 && MANDATORY_LOCK(inode);
2044 * Checks for stateid operations
2047 nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp)
2049 struct nfs4_stateid *stp = NULL;
2050 struct nfs4_delegation *dp = NULL;
2052 struct inode *ino = current_fh->fh_dentry->d_inode;
2055 dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n",
2056 stateid->si_boot, stateid->si_stateownerid,
2057 stateid->si_fileid, stateid->si_generation);
2061 if (io_during_grace_disallowed(ino, flags))
2062 return nfserr_grace;
2064 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
2065 return check_special_stateids(current_fh, stateid, flags);
2068 status = nfserr_stale_stateid;
2069 if (STALE_STATEID(stateid))
2073 status = nfserr_bad_stateid;
2074 if (!stateid->si_fileid) { /* delegation stateid */
2075 if(!(dp = find_delegation_stateid(ino, stateid))) {
2076 dprintk("NFSD: delegation stateid not found\n");
2079 stidp = &dp->dl_stateid;
2080 } else { /* open or lock stateid */
2081 if (!(stp = find_stateid(stateid, flags))) {
2082 dprintk("NFSD: open or lock stateid not found\n");
2085 if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp))
2087 if (!stp->st_stateowner->so_confirmed)
2089 stidp = &stp->st_stateid;
2091 if (stateid->si_generation > stidp->si_generation)
2095 status = nfserr_old_stateid;
2096 if (stateid->si_generation < stidp->si_generation)
2099 if ((status = nfs4_check_openmode(stp,flags)))
2101 renew_client(stp->st_stateowner->so_client);
2103 *filpp = stp->st_vfs_file;
2105 if ((status = nfs4_check_delegmode(dp, flags)))
2107 renew_client(dp->dl_client);
2108 if (flags & DELEG_RET)
2109 unhash_delegation(dp);
2111 *filpp = dp->dl_vfs_file;
2121 return (type == NFS4_READW_LT || type == NFS4_READ_LT) ?
2122 RD_STATE : WR_STATE;
2126 * Checks for sequence id mutating operations.
2129 nfs4_preprocess_seqid_op(struct svc_fh *current_fh, u32 seqid, stateid_t *stateid, int flags, struct nfs4_stateowner **sopp, struct nfs4_stateid **stpp, struct nfsd4_lock *lock)
2131 struct nfs4_stateid *stp;
2132 struct nfs4_stateowner *sop;
2134 dprintk("NFSD: preprocess_seqid_op: seqid=%d "
2135 "stateid = (%08x/%08x/%08x/%08x)\n", seqid,
2136 stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid,
2137 stateid->si_generation);
2142 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) {
2143 printk("NFSD: preprocess_seqid_op: magic stateid!\n");
2144 return nfserr_bad_stateid;
2147 if (STALE_STATEID(stateid))
2148 return nfserr_stale_stateid;
2150 * We return BAD_STATEID if filehandle doesn't match stateid,
2151 * the confirmed flag is incorrecly set, or the generation
2152 * number is incorrect.
2154 stp = find_stateid(stateid, flags);
2157 * Also, we should make sure this isn't just the result of
2160 sop = search_close_lru(stateid->si_stateownerid, flags);
2162 return nfserr_bad_stateid;
2168 struct nfs4_stateowner *sop = stp->st_stateowner;
2169 clientid_t *lockclid = &lock->v.new.clientid;
2170 struct nfs4_client *clp = sop->so_client;
2174 lkflg = setlkflg(lock->lk_type);
2176 if (lock->lk_is_new) {
2177 if (!sop->so_is_open_owner)
2178 return nfserr_bad_stateid;
2179 if (!cmp_clid(&clp->cl_clientid, lockclid))
2180 return nfserr_bad_stateid;
2181 /* stp is the open stateid */
2182 status = nfs4_check_openmode(stp, lkflg);
2186 /* stp is the lock stateid */
2187 status = nfs4_check_openmode(stp->st_openstp, lkflg);
2194 if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) {
2195 printk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n");
2196 return nfserr_bad_stateid;
2200 *sopp = sop = stp->st_stateowner;
2203 * We now validate the seqid and stateid generation numbers.
2204 * For the moment, we ignore the possibility of
2205 * generation number wraparound.
2207 if (seqid != sop->so_seqid)
2210 if (sop->so_confirmed && flags & CONFIRM) {
2211 printk("NFSD: preprocess_seqid_op: expected"
2212 " unconfirmed stateowner!\n");
2213 return nfserr_bad_stateid;
2215 if (!sop->so_confirmed && !(flags & CONFIRM)) {
2216 printk("NFSD: preprocess_seqid_op: stateowner not"
2217 " confirmed yet!\n");
2218 return nfserr_bad_stateid;
2220 if (stateid->si_generation > stp->st_stateid.si_generation) {
2221 printk("NFSD: preprocess_seqid_op: future stateid?!\n");
2222 return nfserr_bad_stateid;
2225 if (stateid->si_generation < stp->st_stateid.si_generation) {
2226 printk("NFSD: preprocess_seqid_op: old stateid!\n");
2227 return nfserr_old_stateid;
2229 renew_client(sop->so_client);
2233 if (seqid == sop->so_seqid - 1) {
2234 dprintk("NFSD: preprocess_seqid_op: retransmission?\n");
2235 /* indicate replay to calling function */
2236 return nfserr_replay_me;
2238 printk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n",
2239 sop->so_seqid, seqid);
2241 return nfserr_bad_seqid;
2245 nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2246 struct nfsd4_open_confirm *oc)
2249 struct nfs4_stateowner *sop;
2250 struct nfs4_stateid *stp;
2252 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
2253 (int)cstate->current_fh.fh_dentry->d_name.len,
2254 cstate->current_fh.fh_dentry->d_name.name);
2256 status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0);
2262 if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh,
2263 oc->oc_seqid, &oc->oc_req_stateid,
2264 CHECK_FH | CONFIRM | OPEN_STATE,
2265 &oc->oc_stateowner, &stp, NULL)))
2268 sop = oc->oc_stateowner;
2269 sop->so_confirmed = 1;
2270 update_stateid(&stp->st_stateid);
2271 memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t));
2272 dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d "
2273 "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid,
2274 stp->st_stateid.si_boot,
2275 stp->st_stateid.si_stateownerid,
2276 stp->st_stateid.si_fileid,
2277 stp->st_stateid.si_generation);
2279 nfsd4_create_clid_dir(sop->so_client);
2281 if (oc->oc_stateowner) {
2282 nfs4_get_stateowner(oc->oc_stateowner);
2283 cstate->replay_owner = oc->oc_stateowner;
2285 nfs4_unlock_state();
2291 * unset all bits in union bitmap (bmap) that
2292 * do not exist in share (from successful OPEN_DOWNGRADE)
2295 reset_union_bmap_access(unsigned long access, unsigned long *bmap)
2298 for (i = 1; i < 4; i++) {
2299 if ((i & access) != i)
2300 __clear_bit(i, bmap);
2305 reset_union_bmap_deny(unsigned long deny, unsigned long *bmap)
2308 for (i = 0; i < 4; i++) {
2309 if ((i & deny) != i)
2310 __clear_bit(i, bmap);
2315 nfsd4_open_downgrade(struct svc_rqst *rqstp,
2316 struct nfsd4_compound_state *cstate,
2317 struct nfsd4_open_downgrade *od)
2320 struct nfs4_stateid *stp;
2321 unsigned int share_access;
2323 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
2324 (int)cstate->current_fh.fh_dentry->d_name.len,
2325 cstate->current_fh.fh_dentry->d_name.name);
2327 if (!access_valid(od->od_share_access)
2328 || !deny_valid(od->od_share_deny))
2329 return nfserr_inval;
2332 if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh,
2335 CHECK_FH | OPEN_STATE,
2336 &od->od_stateowner, &stp, NULL)))
2339 status = nfserr_inval;
2340 if (!test_bit(od->od_share_access, &stp->st_access_bmap)) {
2341 dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n",
2342 stp->st_access_bmap, od->od_share_access);
2345 if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) {
2346 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
2347 stp->st_deny_bmap, od->od_share_deny);
2350 set_access(&share_access, stp->st_access_bmap);
2351 nfs4_file_downgrade(stp->st_vfs_file,
2352 share_access & ~od->od_share_access);
2354 reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap);
2355 reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap);
2357 update_stateid(&stp->st_stateid);
2358 memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t));
2361 if (od->od_stateowner) {
2362 nfs4_get_stateowner(od->od_stateowner);
2363 cstate->replay_owner = od->od_stateowner;
2365 nfs4_unlock_state();
2370 * nfs4_unlock_state() called after encode
2373 nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2374 struct nfsd4_close *close)
2377 struct nfs4_stateid *stp;
2379 dprintk("NFSD: nfsd4_close on file %.*s\n",
2380 (int)cstate->current_fh.fh_dentry->d_name.len,
2381 cstate->current_fh.fh_dentry->d_name.name);
2384 /* check close_lru for replay */
2385 if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh,
2388 CHECK_FH | OPEN_STATE | CLOSE_STATE,
2389 &close->cl_stateowner, &stp, NULL)))
2392 update_stateid(&stp->st_stateid);
2393 memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t));
2395 /* release_stateid() calls nfsd_close() if needed */
2396 release_stateid(stp, OPEN_STATE);
2398 /* place unused nfs4_stateowners on so_close_lru list to be
2399 * released by the laundromat service after the lease period
2400 * to enable us to handle CLOSE replay
2402 if (list_empty(&close->cl_stateowner->so_stateids))
2403 move_to_close_lru(close->cl_stateowner);
2405 if (close->cl_stateowner) {
2406 nfs4_get_stateowner(close->cl_stateowner);
2407 cstate->replay_owner = close->cl_stateowner;
2409 nfs4_unlock_state();
2414 nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2415 struct nfsd4_delegreturn *dr)
2419 if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
2423 status = nfs4_preprocess_stateid_op(&cstate->current_fh,
2424 &dr->dr_stateid, DELEG_RET, NULL);
2425 nfs4_unlock_state();
2432 * Lock owner state (byte-range locks)
2434 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
2435 #define LOCK_HASH_BITS 8
2436 #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS)
2437 #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1)
2439 #define lockownerid_hashval(id) \
2440 ((id) & LOCK_HASH_MASK)
2442 static inline unsigned int
2443 lock_ownerstr_hashval(struct inode *inode, u32 cl_id,
2444 struct xdr_netobj *ownername)
2446 return (file_hashval(inode) + cl_id
2447 + opaque_hashval(ownername->data, ownername->len))
2451 static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE];
2452 static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE];
2453 static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE];
2455 static struct nfs4_stateid *
2456 find_stateid(stateid_t *stid, int flags)
2458 struct nfs4_stateid *local = NULL;
2459 u32 st_id = stid->si_stateownerid;
2460 u32 f_id = stid->si_fileid;
2461 unsigned int hashval;
2463 dprintk("NFSD: find_stateid flags 0x%x\n",flags);
2464 if ((flags & LOCK_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) {
2465 hashval = stateid_hashval(st_id, f_id);
2466 list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) {
2467 if ((local->st_stateid.si_stateownerid == st_id) &&
2468 (local->st_stateid.si_fileid == f_id))
2472 if ((flags & OPEN_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) {
2473 hashval = stateid_hashval(st_id, f_id);
2474 list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) {
2475 if ((local->st_stateid.si_stateownerid == st_id) &&
2476 (local->st_stateid.si_fileid == f_id))
2483 static struct nfs4_delegation *
2484 find_delegation_stateid(struct inode *ino, stateid_t *stid)
2486 struct nfs4_file *fp;
2487 struct nfs4_delegation *dl;
2489 dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n",
2490 stid->si_boot, stid->si_stateownerid,
2491 stid->si_fileid, stid->si_generation);
2493 fp = find_file(ino);
2496 dl = find_delegation_file(fp, stid);
2502 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
2503 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
2504 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
2505 * locking, this prevents us from being completely protocol-compliant. The
2506 * real solution to this problem is to start using unsigned file offsets in
2507 * the VFS, but this is a very deep change!
2510 nfs4_transform_lock_offset(struct file_lock *lock)
2512 if (lock->fl_start < 0)
2513 lock->fl_start = OFFSET_MAX;
2514 if (lock->fl_end < 0)
2515 lock->fl_end = OFFSET_MAX;
2518 /* Hack!: For now, we're defining this just so we can use a pointer to it
2519 * as a unique cookie to identify our (NFSv4's) posix locks. */
2520 static struct lock_manager_operations nfsd_posix_mng_ops = {
2524 nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny)
2526 struct nfs4_stateowner *sop;
2529 if (fl->fl_lmops == &nfsd_posix_mng_ops) {
2530 sop = (struct nfs4_stateowner *) fl->fl_owner;
2531 hval = lockownerid_hashval(sop->so_id);
2532 kref_get(&sop->so_ref);
2534 deny->ld_clientid = sop->so_client->cl_clientid;
2536 deny->ld_sop = NULL;
2537 deny->ld_clientid.cl_boot = 0;
2538 deny->ld_clientid.cl_id = 0;
2540 deny->ld_start = fl->fl_start;
2541 deny->ld_length = ~(u64)0;
2542 if (fl->fl_end != ~(u64)0)
2543 deny->ld_length = fl->fl_end - fl->fl_start + 1;
2544 deny->ld_type = NFS4_READ_LT;
2545 if (fl->fl_type != F_RDLCK)
2546 deny->ld_type = NFS4_WRITE_LT;
2549 static struct nfs4_stateowner *
2550 find_lockstateowner_str(struct inode *inode, clientid_t *clid,
2551 struct xdr_netobj *owner)
2553 unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner);
2554 struct nfs4_stateowner *op;
2556 list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) {
2557 if (cmp_owner_str(op, owner, clid))
2564 * Alloc a lock owner structure.
2565 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
2568 * strhashval = lock_ownerstr_hashval
2571 static struct nfs4_stateowner *
2572 alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) {
2573 struct nfs4_stateowner *sop;
2574 struct nfs4_replay *rp;
2575 unsigned int idhashval;
2577 if (!(sop = alloc_stateowner(&lock->lk_new_owner)))
2579 idhashval = lockownerid_hashval(current_ownerid);
2580 INIT_LIST_HEAD(&sop->so_idhash);
2581 INIT_LIST_HEAD(&sop->so_strhash);
2582 INIT_LIST_HEAD(&sop->so_perclient);
2583 INIT_LIST_HEAD(&sop->so_stateids);
2584 INIT_LIST_HEAD(&sop->so_perstateid);
2585 INIT_LIST_HEAD(&sop->so_close_lru); /* not used */
2587 list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]);
2588 list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]);
2589 list_add(&sop->so_perstateid, &open_stp->st_lockowners);
2590 sop->so_is_open_owner = 0;
2591 sop->so_id = current_ownerid++;
2592 sop->so_client = clp;
2593 /* It is the openowner seqid that will be incremented in encode in the
2594 * case of new lockowners; so increment the lock seqid manually: */
2595 sop->so_seqid = lock->lk_new_lock_seqid + 1;
2596 sop->so_confirmed = 1;
2597 rp = &sop->so_replay;
2598 rp->rp_status = nfserr_serverfault;
2600 rp->rp_buf = rp->rp_ibuf;
2604 static struct nfs4_stateid *
2605 alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp)
2607 struct nfs4_stateid *stp;
2608 unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id);
2610 stp = nfs4_alloc_stateid();
2613 INIT_LIST_HEAD(&stp->st_hash);
2614 INIT_LIST_HEAD(&stp->st_perfile);
2615 INIT_LIST_HEAD(&stp->st_perstateowner);
2616 INIT_LIST_HEAD(&stp->st_lockowners); /* not used */
2617 list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]);
2618 list_add(&stp->st_perfile, &fp->fi_stateids);
2619 list_add(&stp->st_perstateowner, &sop->so_stateids);
2620 stp->st_stateowner = sop;
2623 stp->st_stateid.si_boot = boot_time;
2624 stp->st_stateid.si_stateownerid = sop->so_id;
2625 stp->st_stateid.si_fileid = fp->fi_id;
2626 stp->st_stateid.si_generation = 0;
2627 stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */
2628 stp->st_access_bmap = open_stp->st_access_bmap;
2629 stp->st_deny_bmap = open_stp->st_deny_bmap;
2630 stp->st_openstp = open_stp;
2637 check_lock_length(u64 offset, u64 length)
2639 return ((length == 0) || ((length != ~(u64)0) &&
2640 LOFF_OVERFLOW(offset, length)));
2647 nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2648 struct nfsd4_lock *lock)
2650 struct nfs4_stateowner *open_sop = NULL;
2651 struct nfs4_stateowner *lock_sop = NULL;
2652 struct nfs4_stateid *lock_stp;
2654 struct file_lock file_lock;
2655 struct file_lock conflock;
2657 unsigned int strhashval;
2661 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
2662 (long long) lock->lk_offset,
2663 (long long) lock->lk_length);
2665 if (check_lock_length(lock->lk_offset, lock->lk_length))
2666 return nfserr_inval;
2668 if ((status = fh_verify(rqstp, &cstate->current_fh,
2669 S_IFREG, MAY_LOCK))) {
2670 dprintk("NFSD: nfsd4_lock: permission denied!\n");
2676 if (lock->lk_is_new) {
2678 * Client indicates that this is a new lockowner.
2679 * Use open owner and open stateid to create lock owner and
2682 struct nfs4_stateid *open_stp = NULL;
2683 struct nfs4_file *fp;
2685 status = nfserr_stale_clientid;
2686 if (STALE_CLIENTID(&lock->lk_new_clientid))
2689 /* validate and update open stateid and open seqid */
2690 status = nfs4_preprocess_seqid_op(&cstate->current_fh,
2691 lock->lk_new_open_seqid,
2692 &lock->lk_new_open_stateid,
2693 CHECK_FH | OPEN_STATE,
2694 &lock->lk_replay_owner, &open_stp,
2698 open_sop = lock->lk_replay_owner;
2699 /* create lockowner and lock stateid */
2700 fp = open_stp->st_file;
2701 strhashval = lock_ownerstr_hashval(fp->fi_inode,
2702 open_sop->so_client->cl_clientid.cl_id,
2703 &lock->v.new.owner);
2704 /* XXX: Do we need to check for duplicate stateowners on
2705 * the same file, or should they just be allowed (and
2706 * create new stateids)? */
2707 status = nfserr_resource;
2708 lock_sop = alloc_init_lock_stateowner(strhashval,
2709 open_sop->so_client, open_stp, lock);
2710 if (lock_sop == NULL)
2712 lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp);
2713 if (lock_stp == NULL)
2716 /* lock (lock owner + lock stateid) already exists */
2717 status = nfs4_preprocess_seqid_op(&cstate->current_fh,
2718 lock->lk_old_lock_seqid,
2719 &lock->lk_old_lock_stateid,
2720 CHECK_FH | LOCK_STATE,
2721 &lock->lk_replay_owner, &lock_stp, lock);
2724 lock_sop = lock->lk_replay_owner;
2726 /* lock->lk_replay_owner and lock_stp have been created or found */
2727 filp = lock_stp->st_vfs_file;
2729 status = nfserr_grace;
2730 if (nfs4_in_grace() && !lock->lk_reclaim)
2732 status = nfserr_no_grace;
2733 if (!nfs4_in_grace() && lock->lk_reclaim)
2736 locks_init_lock(&file_lock);
2737 switch (lock->lk_type) {
2740 file_lock.fl_type = F_RDLCK;
2744 case NFS4_WRITEW_LT:
2745 file_lock.fl_type = F_WRLCK;
2749 status = nfserr_inval;
2752 file_lock.fl_owner = (fl_owner_t)lock_sop;
2753 file_lock.fl_pid = current->tgid;
2754 file_lock.fl_file = filp;
2755 file_lock.fl_flags = FL_POSIX;
2756 file_lock.fl_lmops = &nfsd_posix_mng_ops;
2758 file_lock.fl_start = lock->lk_offset;
2759 if ((lock->lk_length == ~(u64)0) ||
2760 LOFF_OVERFLOW(lock->lk_offset, lock->lk_length))
2761 file_lock.fl_end = ~(u64)0;
2763 file_lock.fl_end = lock->lk_offset + lock->lk_length - 1;
2764 nfs4_transform_lock_offset(&file_lock);
2767 * Try to lock the file in the VFS.
2768 * Note: locks.c uses the BKL to protect the inode's lock list.
2771 /* XXX?: Just to divert the locks_release_private at the start of
2772 * locks_copy_lock: */
2773 locks_init_lock(&conflock);
2774 err = vfs_lock_file(filp, cmd, &file_lock, &conflock);
2776 case 0: /* success! */
2777 update_stateid(&lock_stp->st_stateid);
2778 memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid,
2782 case (EAGAIN): /* conflock holds conflicting lock */
2783 status = nfserr_denied;
2784 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
2785 nfs4_set_lock_denied(&conflock, &lock->lk_denied);
2788 status = nfserr_deadlock;
2791 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err);
2792 status = nfserr_resource;
2796 if (status && lock->lk_is_new && lock_sop)
2797 release_stateowner(lock_sop);
2798 if (lock->lk_replay_owner) {
2799 nfs4_get_stateowner(lock->lk_replay_owner);
2800 cstate->replay_owner = lock->lk_replay_owner;
2802 nfs4_unlock_state();
2810 nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2811 struct nfsd4_lockt *lockt)
2813 struct inode *inode;
2815 struct file_lock file_lock;
2819 if (nfs4_in_grace())
2820 return nfserr_grace;
2822 if (check_lock_length(lockt->lt_offset, lockt->lt_length))
2823 return nfserr_inval;
2825 lockt->lt_stateowner = NULL;
2828 status = nfserr_stale_clientid;
2829 if (STALE_CLIENTID(&lockt->lt_clientid))
2832 if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) {
2833 dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n");
2834 if (status == nfserr_symlink)
2835 status = nfserr_inval;
2839 inode = cstate->current_fh.fh_dentry->d_inode;
2840 locks_init_lock(&file_lock);
2841 switch (lockt->lt_type) {
2844 file_lock.fl_type = F_RDLCK;
2847 case NFS4_WRITEW_LT:
2848 file_lock.fl_type = F_WRLCK;
2851 printk("NFSD: nfs4_lockt: bad lock type!\n");
2852 status = nfserr_inval;
2856 lockt->lt_stateowner = find_lockstateowner_str(inode,
2857 &lockt->lt_clientid, &lockt->lt_owner);
2858 if (lockt->lt_stateowner)
2859 file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner;
2860 file_lock.fl_pid = current->tgid;
2861 file_lock.fl_flags = FL_POSIX;
2862 file_lock.fl_lmops = &nfsd_posix_mng_ops;
2864 file_lock.fl_start = lockt->lt_offset;
2865 if ((lockt->lt_length == ~(u64)0) || LOFF_OVERFLOW(lockt->lt_offset, lockt->lt_length))
2866 file_lock.fl_end = ~(u64)0;
2868 file_lock.fl_end = lockt->lt_offset + lockt->lt_length - 1;
2870 nfs4_transform_lock_offset(&file_lock);
2872 /* vfs_test_lock uses the struct file _only_ to resolve the inode.
2873 * since LOCKT doesn't require an OPEN, and therefore a struct
2874 * file may not exist, pass vfs_test_lock a struct file with
2875 * only the dentry:inode set.
2877 memset(&file, 0, sizeof (struct file));
2878 file.f_path.dentry = cstate->current_fh.fh_dentry;
2881 error = vfs_test_lock(&file, &file_lock);
2883 status = nfserrno(error);
2886 if (file_lock.fl_type != F_UNLCK) {
2887 status = nfserr_denied;
2888 nfs4_set_lock_denied(&file_lock, &lockt->lt_denied);
2891 nfs4_unlock_state();
2896 nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2897 struct nfsd4_locku *locku)
2899 struct nfs4_stateid *stp;
2900 struct file *filp = NULL;
2901 struct file_lock file_lock;
2905 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
2906 (long long) locku->lu_offset,
2907 (long long) locku->lu_length);
2909 if (check_lock_length(locku->lu_offset, locku->lu_length))
2910 return nfserr_inval;
2914 if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh,
2917 CHECK_FH | LOCK_STATE,
2918 &locku->lu_stateowner, &stp, NULL)))
2921 filp = stp->st_vfs_file;
2923 locks_init_lock(&file_lock);
2924 file_lock.fl_type = F_UNLCK;
2925 file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner;
2926 file_lock.fl_pid = current->tgid;
2927 file_lock.fl_file = filp;
2928 file_lock.fl_flags = FL_POSIX;
2929 file_lock.fl_lmops = &nfsd_posix_mng_ops;
2930 file_lock.fl_start = locku->lu_offset;
2932 if ((locku->lu_length == ~(u64)0) || LOFF_OVERFLOW(locku->lu_offset, locku->lu_length))
2933 file_lock.fl_end = ~(u64)0;
2935 file_lock.fl_end = locku->lu_offset + locku->lu_length - 1;
2936 nfs4_transform_lock_offset(&file_lock);
2939 * Try to unlock the file in the VFS.
2941 err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL);
2943 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
2947 * OK, unlock succeeded; the only thing left to do is update the stateid.
2949 update_stateid(&stp->st_stateid);
2950 memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t));
2953 if (locku->lu_stateowner) {
2954 nfs4_get_stateowner(locku->lu_stateowner);
2955 cstate->replay_owner = locku->lu_stateowner;
2957 nfs4_unlock_state();
2961 status = nfserrno(err);
2967 * 1: locks held by lockowner
2968 * 0: no locks held by lockowner
2971 check_for_locks(struct file *filp, struct nfs4_stateowner *lowner)
2973 struct file_lock **flpp;
2974 struct inode *inode = filp->f_path.dentry->d_inode;
2978 for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) {
2979 if ((*flpp)->fl_owner == (fl_owner_t)lowner) {
2990 nfsd4_release_lockowner(struct svc_rqst *rqstp,
2991 struct nfsd4_compound_state *cstate,
2992 struct nfsd4_release_lockowner *rlockowner)
2994 clientid_t *clid = &rlockowner->rl_clientid;
2995 struct nfs4_stateowner *sop;
2996 struct nfs4_stateid *stp;
2997 struct xdr_netobj *owner = &rlockowner->rl_owner;
2998 struct list_head matches;
3002 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
3003 clid->cl_boot, clid->cl_id);
3005 /* XXX check for lease expiration */
3007 status = nfserr_stale_clientid;
3008 if (STALE_CLIENTID(clid))
3013 status = nfserr_locks_held;
3014 /* XXX: we're doing a linear search through all the lockowners.
3015 * Yipes! For now we'll just hope clients aren't really using
3016 * release_lockowner much, but eventually we have to fix these
3017 * data structures. */
3018 INIT_LIST_HEAD(&matches);
3019 for (i = 0; i < LOCK_HASH_SIZE; i++) {
3020 list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) {
3021 if (!cmp_owner_str(sop, owner, clid))
3023 list_for_each_entry(stp, &sop->so_stateids,
3025 if (check_for_locks(stp->st_vfs_file, sop))
3027 /* Note: so_perclient unused for lockowners,
3028 * so it's OK to fool with here. */
3029 list_add(&sop->so_perclient, &matches);
3033 /* Clients probably won't expect us to return with some (but not all)
3034 * of the lockowner state released; so don't release any until all
3035 * have been checked. */
3037 while (!list_empty(&matches)) {
3038 sop = list_entry(matches.next, struct nfs4_stateowner,
3040 /* unhash_stateowner deletes so_perclient only
3041 * for openowners. */
3042 list_del(&sop->so_perclient);
3043 release_stateowner(sop);
3046 nfs4_unlock_state();
3050 static inline struct nfs4_client_reclaim *
3053 return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL);
3057 nfs4_has_reclaimed_state(const char *name)
3059 unsigned int strhashval = clientstr_hashval(name);
3060 struct nfs4_client *clp;
3062 clp = find_confirmed_client_by_str(name, strhashval);
3067 * failure => all reset bets are off, nfserr_no_grace...
3070 nfs4_client_to_reclaim(const char *name)
3072 unsigned int strhashval;
3073 struct nfs4_client_reclaim *crp = NULL;
3075 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name);
3076 crp = alloc_reclaim();
3079 strhashval = clientstr_hashval(name);
3080 INIT_LIST_HEAD(&crp->cr_strhash);
3081 list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]);
3082 memcpy(crp->cr_recdir, name, HEXDIR_LEN);
3083 reclaim_str_hashtbl_size++;
3088 nfs4_release_reclaim(void)
3090 struct nfs4_client_reclaim *crp = NULL;
3093 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
3094 while (!list_empty(&reclaim_str_hashtbl[i])) {
3095 crp = list_entry(reclaim_str_hashtbl[i].next,
3096 struct nfs4_client_reclaim, cr_strhash);
3097 list_del(&crp->cr_strhash);
3099 reclaim_str_hashtbl_size--;
3102 BUG_ON(reclaim_str_hashtbl_size);
3106 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
3107 static struct nfs4_client_reclaim *
3108 nfs4_find_reclaim_client(clientid_t *clid)
3110 unsigned int strhashval;
3111 struct nfs4_client *clp;
3112 struct nfs4_client_reclaim *crp = NULL;
3115 /* find clientid in conf_id_hashtbl */
3116 clp = find_confirmed_client(clid);
3120 dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n",
3121 clp->cl_name.len, clp->cl_name.data,
3124 /* find clp->cl_name in reclaim_str_hashtbl */
3125 strhashval = clientstr_hashval(clp->cl_recdir);
3126 list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) {
3127 if (same_name(crp->cr_recdir, clp->cl_recdir)) {
3135 * Called from OPEN. Look for clientid in reclaim list.
3138 nfs4_check_open_reclaim(clientid_t *clid)
3140 return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad;
3143 /* initialization to perform at module load time: */
3146 nfs4_state_init(void)
3150 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
3151 INIT_LIST_HEAD(&conf_id_hashtbl[i]);
3152 INIT_LIST_HEAD(&conf_str_hashtbl[i]);
3153 INIT_LIST_HEAD(&unconf_str_hashtbl[i]);
3154 INIT_LIST_HEAD(&unconf_id_hashtbl[i]);
3156 for (i = 0; i < FILE_HASH_SIZE; i++) {
3157 INIT_LIST_HEAD(&file_hashtbl[i]);
3159 for (i = 0; i < OWNER_HASH_SIZE; i++) {
3160 INIT_LIST_HEAD(&ownerstr_hashtbl[i]);
3161 INIT_LIST_HEAD(&ownerid_hashtbl[i]);
3163 for (i = 0; i < STATEID_HASH_SIZE; i++) {
3164 INIT_LIST_HEAD(&stateid_hashtbl[i]);
3165 INIT_LIST_HEAD(&lockstateid_hashtbl[i]);
3167 for (i = 0; i < LOCK_HASH_SIZE; i++) {
3168 INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]);
3169 INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]);
3171 memset(&onestateid, ~0, sizeof(stateid_t));
3172 INIT_LIST_HEAD(&close_lru);
3173 INIT_LIST_HEAD(&client_lru);
3174 INIT_LIST_HEAD(&del_recall_lru);
3175 for (i = 0; i < CLIENT_HASH_SIZE; i++)
3176 INIT_LIST_HEAD(&reclaim_str_hashtbl[i]);
3177 reclaim_str_hashtbl_size = 0;
3181 nfsd4_load_reboot_recovery_data(void)
3186 nfsd4_init_recdir(user_recovery_dirname);
3187 status = nfsd4_recdir_load();
3188 nfs4_unlock_state();
3190 printk("NFSD: Failure reading reboot recovery data\n");
3193 /* initialization to perform when the nfsd service is started: */
3196 __nfs4_state_start(void)
3200 boot_time = get_seconds();
3201 grace_time = max(user_lease_time, lease_time);
3202 lease_time = user_lease_time;
3204 printk("NFSD: starting %ld-second grace period\n", grace_time);
3205 laundry_wq = create_singlethread_workqueue("nfsd4");
3206 queue_delayed_work(laundry_wq, &laundromat_work, grace_time*HZ);
3210 nfs4_state_start(void)
3216 status = nfsd4_init_slabs();
3219 nfsd4_load_reboot_recovery_data();
3220 __nfs4_state_start();
3232 nfs4_lease_time(void)
3238 __nfs4_state_shutdown(void)
3241 struct nfs4_client *clp = NULL;
3242 struct nfs4_delegation *dp = NULL;
3243 struct list_head *pos, *next, reaplist;
3245 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
3246 while (!list_empty(&conf_id_hashtbl[i])) {
3247 clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
3250 while (!list_empty(&unconf_str_hashtbl[i])) {
3251 clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash);
3255 INIT_LIST_HEAD(&reaplist);
3256 spin_lock(&recall_lock);
3257 list_for_each_safe(pos, next, &del_recall_lru) {
3258 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
3259 list_move(&dp->dl_recall_lru, &reaplist);
3261 spin_unlock(&recall_lock);
3262 list_for_each_safe(pos, next, &reaplist) {
3263 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
3264 list_del_init(&dp->dl_recall_lru);
3265 unhash_delegation(dp);
3268 nfsd4_shutdown_recdir();
3273 nfs4_state_shutdown(void)
3275 cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work);
3276 destroy_workqueue(laundry_wq);
3278 nfs4_release_reclaim();
3279 __nfs4_state_shutdown();
3281 nfs4_unlock_state();
3285 nfs4_set_recdir(char *recdir)
3288 strcpy(user_recovery_dirname, recdir);
3289 nfs4_unlock_state();
3293 * Change the NFSv4 recovery directory to recdir.
3296 nfs4_reset_recoverydir(char *recdir)
3299 struct nameidata nd;
3301 status = path_lookup(recdir, LOOKUP_FOLLOW, &nd);
3305 if (S_ISDIR(nd.dentry->d_inode->i_mode)) {
3306 nfs4_set_recdir(recdir);
3314 * Called when leasetime is changed.
3316 * The only way the protocol gives us to handle on-the-fly lease changes is to
3317 * simulate a reboot. Instead of doing that, we just wait till the next time
3318 * we start to register any changes in lease time. If the administrator
3319 * really wants to change the lease time *now*, they can go ahead and bring
3320 * nfsd down and then back up again after changing the lease time.
3323 nfs4_reset_lease(time_t leasetime)
3326 user_lease_time = leasetime;