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>
54 #define NFSDDBG_FACILITY NFSDDBG_PROC
57 static time_t lease_time = 90; /* default lease time */
58 static time_t user_lease_time = 90;
59 static time_t boot_time;
60 static int in_grace = 1;
61 static u32 current_clientid = 1;
62 static u32 current_ownerid = 1;
63 static u32 current_fileid = 1;
64 static u32 current_delegid = 1;
66 static stateid_t zerostateid; /* bits all 0 */
67 static stateid_t onestateid; /* bits all 1 */
69 #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t)))
70 #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t)))
72 /* forward declarations */
73 static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags);
74 static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid);
75 static void release_stateid_lockowners(struct nfs4_stateid *open_stp);
76 static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery";
77 static void nfs4_set_recdir(char *recdir);
82 * protects clientid_hashtbl[], clientstr_hashtbl[],
83 * unconfstr_hashtbl[], uncofid_hashtbl[].
85 static DEFINE_MUTEX(client_mutex);
87 static kmem_cache_t *stateowner_slab = NULL;
88 static kmem_cache_t *file_slab = NULL;
89 static kmem_cache_t *stateid_slab = NULL;
90 static kmem_cache_t *deleg_slab = NULL;
95 mutex_lock(&client_mutex);
99 nfs4_unlock_state(void)
101 mutex_unlock(&client_mutex);
105 opaque_hashval(const void *ptr, int nbytes)
107 unsigned char *cptr = (unsigned char *) ptr;
117 /* forward declarations */
118 static void release_stateowner(struct nfs4_stateowner *sop);
119 static void release_stateid(struct nfs4_stateid *stp, int flags);
125 /* recall_lock protects the del_recall_lru */
126 static DEFINE_SPINLOCK(recall_lock);
127 static struct list_head del_recall_lru;
130 free_nfs4_file(struct kref *kref)
132 struct nfs4_file *fp = container_of(kref, struct nfs4_file, fi_ref);
133 list_del(&fp->fi_hash);
135 kmem_cache_free(file_slab, fp);
139 put_nfs4_file(struct nfs4_file *fi)
141 kref_put(&fi->fi_ref, free_nfs4_file);
145 get_nfs4_file(struct nfs4_file *fi)
147 kref_get(&fi->fi_ref);
150 static int num_delegations;
153 * Open owner state (share locks)
156 /* hash tables for nfs4_stateowner */
157 #define OWNER_HASH_BITS 8
158 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
159 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
161 #define ownerid_hashval(id) \
162 ((id) & OWNER_HASH_MASK)
163 #define ownerstr_hashval(clientid, ownername) \
164 (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK)
166 static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE];
167 static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE];
169 /* hash table for nfs4_file */
170 #define FILE_HASH_BITS 8
171 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
172 #define FILE_HASH_MASK (FILE_HASH_SIZE - 1)
173 /* hash table for (open)nfs4_stateid */
174 #define STATEID_HASH_BITS 10
175 #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS)
176 #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1)
178 #define file_hashval(x) \
179 hash_ptr(x, FILE_HASH_BITS)
180 #define stateid_hashval(owner_id, file_id) \
181 (((owner_id) + (file_id)) & STATEID_HASH_MASK)
183 static struct list_head file_hashtbl[FILE_HASH_SIZE];
184 static struct list_head stateid_hashtbl[STATEID_HASH_SIZE];
186 static struct nfs4_delegation *
187 alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type)
189 struct nfs4_delegation *dp;
190 struct nfs4_file *fp = stp->st_file;
191 struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback;
193 dprintk("NFSD alloc_init_deleg\n");
194 if (num_delegations > STATEID_HASH_SIZE * 4)
196 dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL);
200 INIT_LIST_HEAD(&dp->dl_perfile);
201 INIT_LIST_HEAD(&dp->dl_perclnt);
202 INIT_LIST_HEAD(&dp->dl_recall_lru);
207 get_file(stp->st_vfs_file);
208 dp->dl_vfs_file = stp->st_vfs_file;
210 dp->dl_recall.cbr_dp = NULL;
211 dp->dl_recall.cbr_ident = cb->cb_ident;
212 dp->dl_recall.cbr_trunc = 0;
213 dp->dl_stateid.si_boot = boot_time;
214 dp->dl_stateid.si_stateownerid = current_delegid++;
215 dp->dl_stateid.si_fileid = 0;
216 dp->dl_stateid.si_generation = 0;
217 dp->dl_fhlen = current_fh->fh_handle.fh_size;
218 memcpy(dp->dl_fhval, ¤t_fh->fh_handle.fh_base,
219 current_fh->fh_handle.fh_size);
221 atomic_set(&dp->dl_count, 1);
222 list_add(&dp->dl_perfile, &fp->fi_delegations);
223 list_add(&dp->dl_perclnt, &clp->cl_delegations);
228 nfs4_put_delegation(struct nfs4_delegation *dp)
230 if (atomic_dec_and_test(&dp->dl_count)) {
231 dprintk("NFSD: freeing dp %p\n",dp);
232 put_nfs4_file(dp->dl_file);
233 kmem_cache_free(deleg_slab, dp);
238 /* Remove the associated file_lock first, then remove the delegation.
239 * lease_modify() is called to remove the FS_LEASE file_lock from
240 * the i_flock list, eventually calling nfsd's lock_manager
241 * fl_release_callback.
244 nfs4_close_delegation(struct nfs4_delegation *dp)
246 struct file *filp = dp->dl_vfs_file;
248 dprintk("NFSD: close_delegation dp %p\n",dp);
249 dp->dl_vfs_file = NULL;
250 /* The following nfsd_close may not actually close the file,
251 * but we want to remove the lease in any case. */
253 setlease(filp, F_UNLCK, &dp->dl_flock);
257 /* Called under the state lock. */
259 unhash_delegation(struct nfs4_delegation *dp)
261 list_del_init(&dp->dl_perfile);
262 list_del_init(&dp->dl_perclnt);
263 spin_lock(&recall_lock);
264 list_del_init(&dp->dl_recall_lru);
265 spin_unlock(&recall_lock);
266 nfs4_close_delegation(dp);
267 nfs4_put_delegation(dp);
274 /* Hash tables for nfs4_clientid state */
275 #define CLIENT_HASH_BITS 4
276 #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
277 #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
279 #define clientid_hashval(id) \
280 ((id) & CLIENT_HASH_MASK)
281 #define clientstr_hashval(name) \
282 (opaque_hashval((name), 8) & CLIENT_HASH_MASK)
284 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
285 * used in reboot/reset lease grace period processing
287 * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed
288 * setclientid_confirmed info.
290 * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed
293 * client_lru holds client queue ordered by nfs4_client.cl_time
296 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
297 * for last close replay.
299 static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE];
300 static int reclaim_str_hashtbl_size = 0;
301 static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE];
302 static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE];
303 static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE];
304 static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE];
305 static struct list_head client_lru;
306 static struct list_head close_lru;
309 renew_client(struct nfs4_client *clp)
312 * Move client to the end to the LRU list.
314 dprintk("renewing client (clientid %08x/%08x)\n",
315 clp->cl_clientid.cl_boot,
316 clp->cl_clientid.cl_id);
317 list_move_tail(&clp->cl_lru, &client_lru);
318 clp->cl_time = get_seconds();
321 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
323 STALE_CLIENTID(clientid_t *clid)
325 if (clid->cl_boot == boot_time)
327 dprintk("NFSD stale clientid (%08x/%08x)\n",
328 clid->cl_boot, clid->cl_id);
333 * XXX Should we use a slab cache ?
334 * This type of memory management is somewhat inefficient, but we use it
335 * anyway since SETCLIENTID is not a common operation.
337 static inline struct nfs4_client *
338 alloc_client(struct xdr_netobj name)
340 struct nfs4_client *clp;
342 if ((clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL))!= NULL) {
343 if ((clp->cl_name.data = kmalloc(name.len, GFP_KERNEL)) != NULL) {
344 memcpy(clp->cl_name.data, name.data, name.len);
345 clp->cl_name.len = name.len;
356 free_client(struct nfs4_client *clp)
358 if (clp->cl_cred.cr_group_info)
359 put_group_info(clp->cl_cred.cr_group_info);
360 kfree(clp->cl_name.data);
365 put_nfs4_client(struct nfs4_client *clp)
367 if (atomic_dec_and_test(&clp->cl_count))
372 shutdown_callback_client(struct nfs4_client *clp)
374 struct rpc_clnt *clnt = clp->cl_callback.cb_client;
376 /* shutdown rpc client, ending any outstanding recall rpcs */
378 clp->cl_callback.cb_client = NULL;
379 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_setclientid *setclid)
716 u32 ip_addr = rqstp->rq_addr.sin_addr.s_addr;
717 struct xdr_netobj clname = {
718 .len = setclid->se_namelen,
719 .data = setclid->se_name,
721 nfs4_verifier clverifier = setclid->se_verf;
722 unsigned int strhashval;
723 struct nfs4_client *conf, *unconf, *new;
725 char dname[HEXDIR_LEN];
727 if (!check_name(clname))
730 status = nfs4_make_rec_clidname(dname, &clname);
735 * XXX The Duplicate Request Cache (DRC) has been checked (??)
736 * We get here on a DRC miss.
739 strhashval = clientstr_hashval(dname);
742 conf = find_confirmed_client_by_str(dname, strhashval);
746 * clname match, confirmed, different principal
747 * or different ip_address
749 status = nfserr_clid_inuse;
750 if (!cmp_creds(&conf->cl_cred, &rqstp->rq_cred)
751 || conf->cl_addr != ip_addr) {
752 printk("NFSD: setclientid: string in use by client"
753 "(clientid %08x/%08x)\n",
754 conf->cl_clientid.cl_boot, conf->cl_clientid.cl_id);
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 = ip_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 = ip_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 = ip_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 = ip_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, struct nfsd4_setclientid_confirm *setclientid_confirm)
881 u32 ip_addr = rqstp->rq_addr.sin_addr.s_addr;
882 struct nfs4_client *conf, *unconf;
883 nfs4_verifier confirm = setclientid_confirm->sc_confirm;
884 clientid_t * clid = &setclientid_confirm->sc_clientid;
887 if (STALE_CLIENTID(clid))
888 return nfserr_stale_clientid;
890 * XXX The Duplicate Request Cache (DRC) has been checked (??)
891 * We get here on a DRC miss.
896 conf = find_confirmed_client(clid);
897 unconf = find_unconfirmed_client(clid);
899 status = nfserr_clid_inuse;
900 if (conf && conf->cl_addr != ip_addr)
902 if (unconf && unconf->cl_addr != ip_addr)
905 if ((conf && unconf) &&
906 (cmp_verf(&unconf->cl_confirm, &confirm)) &&
907 (cmp_verf(&conf->cl_verifier, &unconf->cl_verifier)) &&
908 (same_name(conf->cl_recdir,unconf->cl_recdir)) &&
909 (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm))) {
911 * unconf record that matches input clientid and input confirm.
912 * conf record that matches input clientid.
913 * conf and unconf records match names, verifiers
915 if (!cmp_creds(&conf->cl_cred, &unconf->cl_cred))
916 status = nfserr_clid_inuse;
918 /* XXX: We just turn off callbacks until we can handle
919 * change request correctly. */
920 atomic_set(&conf->cl_callback.cb_set, 0);
922 nfsd4_remove_clid_dir(unconf);
923 expire_client(unconf);
927 } else if ((conf && !unconf) ||
929 (!cmp_verf(&conf->cl_verifier, &unconf->cl_verifier) ||
930 !same_name(conf->cl_recdir, unconf->cl_recdir)))) {
932 * conf record that matches input clientid.
933 * if unconf record matches input clientid, then
934 * unconf->cl_name or unconf->cl_verifier don't match the
937 if (!cmp_creds(&conf->cl_cred,&rqstp->rq_cred))
938 status = nfserr_clid_inuse;
941 } else if (!conf && unconf
942 && cmp_verf(&unconf->cl_confirm, &confirm)) {
944 * conf record not found.
945 * unconf record found.
946 * unconf->cl_confirm matches input confirm
948 if (!cmp_creds(&unconf->cl_cred, &rqstp->rq_cred)) {
949 status = nfserr_clid_inuse;
952 clientstr_hashval(unconf->cl_recdir);
953 conf = find_confirmed_client_by_str(unconf->cl_recdir,
956 nfsd4_remove_clid_dir(conf);
959 move_to_confirmed(unconf);
963 } else if ((!conf || (conf && !cmp_verf(&conf->cl_confirm, &confirm)))
964 && (!unconf || (unconf && !cmp_verf(&unconf->cl_confirm,
967 * conf record not found, or if conf, conf->cl_confirm does not
968 * match input confirm.
969 * unconf record not found, or if unconf, unconf->cl_confirm
970 * does not match input confirm.
972 status = nfserr_stale_clientid;
974 /* check that we have hit one of the cases...*/
975 status = nfserr_clid_inuse;
979 nfsd4_probe_callback(conf);
984 /* OPEN Share state helper functions */
985 static inline struct nfs4_file *
986 alloc_init_file(struct inode *ino)
988 struct nfs4_file *fp;
989 unsigned int hashval = file_hashval(ino);
991 fp = kmem_cache_alloc(file_slab, GFP_KERNEL);
993 kref_init(&fp->fi_ref);
994 INIT_LIST_HEAD(&fp->fi_hash);
995 INIT_LIST_HEAD(&fp->fi_stateids);
996 INIT_LIST_HEAD(&fp->fi_delegations);
997 list_add(&fp->fi_hash, &file_hashtbl[hashval]);
998 fp->fi_inode = igrab(ino);
999 fp->fi_id = current_fileid++;
1006 nfsd4_free_slab(kmem_cache_t **slab)
1012 status = kmem_cache_destroy(*slab);
1018 nfsd4_free_slabs(void)
1020 nfsd4_free_slab(&stateowner_slab);
1021 nfsd4_free_slab(&file_slab);
1022 nfsd4_free_slab(&stateid_slab);
1023 nfsd4_free_slab(&deleg_slab);
1027 nfsd4_init_slabs(void)
1029 stateowner_slab = kmem_cache_create("nfsd4_stateowners",
1030 sizeof(struct nfs4_stateowner), 0, 0, NULL, NULL);
1031 if (stateowner_slab == NULL)
1033 file_slab = kmem_cache_create("nfsd4_files",
1034 sizeof(struct nfs4_file), 0, 0, NULL, NULL);
1035 if (file_slab == NULL)
1037 stateid_slab = kmem_cache_create("nfsd4_stateids",
1038 sizeof(struct nfs4_stateid), 0, 0, NULL, NULL);
1039 if (stateid_slab == NULL)
1041 deleg_slab = kmem_cache_create("nfsd4_delegations",
1042 sizeof(struct nfs4_delegation), 0, 0, NULL, NULL);
1043 if (deleg_slab == NULL)
1048 dprintk("nfsd4: out of memory while initializing nfsv4\n");
1053 nfs4_free_stateowner(struct kref *kref)
1055 struct nfs4_stateowner *sop =
1056 container_of(kref, struct nfs4_stateowner, so_ref);
1057 kfree(sop->so_owner.data);
1058 kmem_cache_free(stateowner_slab, sop);
1061 static inline struct nfs4_stateowner *
1062 alloc_stateowner(struct xdr_netobj *owner)
1064 struct nfs4_stateowner *sop;
1066 if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) {
1067 if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) {
1068 memcpy(sop->so_owner.data, owner->data, owner->len);
1069 sop->so_owner.len = owner->len;
1070 kref_init(&sop->so_ref);
1073 kmem_cache_free(stateowner_slab, sop);
1078 static struct nfs4_stateowner *
1079 alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) {
1080 struct nfs4_stateowner *sop;
1081 struct nfs4_replay *rp;
1082 unsigned int idhashval;
1084 if (!(sop = alloc_stateowner(&open->op_owner)))
1086 idhashval = ownerid_hashval(current_ownerid);
1087 INIT_LIST_HEAD(&sop->so_idhash);
1088 INIT_LIST_HEAD(&sop->so_strhash);
1089 INIT_LIST_HEAD(&sop->so_perclient);
1090 INIT_LIST_HEAD(&sop->so_stateids);
1091 INIT_LIST_HEAD(&sop->so_perstateid); /* not used */
1092 INIT_LIST_HEAD(&sop->so_close_lru);
1094 list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]);
1095 list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]);
1096 list_add(&sop->so_perclient, &clp->cl_openowners);
1097 sop->so_is_open_owner = 1;
1098 sop->so_id = current_ownerid++;
1099 sop->so_client = clp;
1100 sop->so_seqid = open->op_seqid;
1101 sop->so_confirmed = 0;
1102 rp = &sop->so_replay;
1103 rp->rp_status = nfserr_serverfault;
1105 rp->rp_buf = rp->rp_ibuf;
1110 release_stateid_lockowners(struct nfs4_stateid *open_stp)
1112 struct nfs4_stateowner *lock_sop;
1114 while (!list_empty(&open_stp->st_lockowners)) {
1115 lock_sop = list_entry(open_stp->st_lockowners.next,
1116 struct nfs4_stateowner, so_perstateid);
1117 /* list_del(&open_stp->st_lockowners); */
1118 BUG_ON(lock_sop->so_is_open_owner);
1119 release_stateowner(lock_sop);
1124 unhash_stateowner(struct nfs4_stateowner *sop)
1126 struct nfs4_stateid *stp;
1128 list_del(&sop->so_idhash);
1129 list_del(&sop->so_strhash);
1130 if (sop->so_is_open_owner)
1131 list_del(&sop->so_perclient);
1132 list_del(&sop->so_perstateid);
1133 while (!list_empty(&sop->so_stateids)) {
1134 stp = list_entry(sop->so_stateids.next,
1135 struct nfs4_stateid, st_perstateowner);
1136 if (sop->so_is_open_owner)
1137 release_stateid(stp, OPEN_STATE);
1139 release_stateid(stp, LOCK_STATE);
1144 release_stateowner(struct nfs4_stateowner *sop)
1146 unhash_stateowner(sop);
1147 list_del(&sop->so_close_lru);
1148 nfs4_put_stateowner(sop);
1152 init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) {
1153 struct nfs4_stateowner *sop = open->op_stateowner;
1154 unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id);
1156 INIT_LIST_HEAD(&stp->st_hash);
1157 INIT_LIST_HEAD(&stp->st_perstateowner);
1158 INIT_LIST_HEAD(&stp->st_lockowners);
1159 INIT_LIST_HEAD(&stp->st_perfile);
1160 list_add(&stp->st_hash, &stateid_hashtbl[hashval]);
1161 list_add(&stp->st_perstateowner, &sop->so_stateids);
1162 list_add(&stp->st_perfile, &fp->fi_stateids);
1163 stp->st_stateowner = sop;
1166 stp->st_stateid.si_boot = boot_time;
1167 stp->st_stateid.si_stateownerid = sop->so_id;
1168 stp->st_stateid.si_fileid = fp->fi_id;
1169 stp->st_stateid.si_generation = 0;
1170 stp->st_access_bmap = 0;
1171 stp->st_deny_bmap = 0;
1172 __set_bit(open->op_share_access, &stp->st_access_bmap);
1173 __set_bit(open->op_share_deny, &stp->st_deny_bmap);
1174 stp->st_openstp = NULL;
1178 release_stateid(struct nfs4_stateid *stp, int flags)
1180 struct file *filp = stp->st_vfs_file;
1182 list_del(&stp->st_hash);
1183 list_del(&stp->st_perfile);
1184 list_del(&stp->st_perstateowner);
1185 if (flags & OPEN_STATE) {
1186 release_stateid_lockowners(stp);
1187 stp->st_vfs_file = NULL;
1189 } else if (flags & LOCK_STATE)
1190 locks_remove_posix(filp, (fl_owner_t) stp->st_stateowner);
1191 put_nfs4_file(stp->st_file);
1192 kmem_cache_free(stateid_slab, stp);
1196 move_to_close_lru(struct nfs4_stateowner *sop)
1198 dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop);
1200 list_move_tail(&sop->so_close_lru, &close_lru);
1201 sop->so_time = get_seconds();
1205 cmp_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, clientid_t *clid) {
1206 return ((sop->so_owner.len == owner->len) &&
1207 !memcmp(sop->so_owner.data, owner->data, owner->len) &&
1208 (sop->so_client->cl_clientid.cl_id == clid->cl_id));
1211 static struct nfs4_stateowner *
1212 find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open)
1214 struct nfs4_stateowner *so = NULL;
1216 list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) {
1217 if (cmp_owner_str(so, &open->op_owner, &open->op_clientid))
1223 /* search file_hashtbl[] for file */
1224 static struct nfs4_file *
1225 find_file(struct inode *ino)
1227 unsigned int hashval = file_hashval(ino);
1228 struct nfs4_file *fp;
1230 list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) {
1231 if (fp->fi_inode == ino) {
1239 static int access_valid(u32 x)
1241 return (x > 0 && x < 4);
1244 static int deny_valid(u32 x)
1246 return (x >= 0 && x < 5);
1250 set_access(unsigned int *access, unsigned long bmap) {
1254 for (i = 1; i < 4; i++) {
1255 if (test_bit(i, &bmap))
1261 set_deny(unsigned int *deny, unsigned long bmap) {
1265 for (i = 0; i < 4; i++) {
1266 if (test_bit(i, &bmap))
1272 test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) {
1273 unsigned int access, deny;
1275 set_access(&access, stp->st_access_bmap);
1276 set_deny(&deny, stp->st_deny_bmap);
1277 if ((access & open->op_share_deny) || (deny & open->op_share_access))
1283 * Called to check deny when READ with all zero stateid or
1284 * WRITE with all zero or all one stateid
1287 nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type)
1289 struct inode *ino = current_fh->fh_dentry->d_inode;
1290 struct nfs4_file *fp;
1291 struct nfs4_stateid *stp;
1294 dprintk("NFSD: nfs4_share_conflict\n");
1296 fp = find_file(ino);
1299 ret = nfserr_locked;
1300 /* Search for conflicting share reservations */
1301 list_for_each_entry(stp, &fp->fi_stateids, st_perfile) {
1302 if (test_bit(deny_type, &stp->st_deny_bmap) ||
1303 test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap))
1313 nfs4_file_downgrade(struct file *filp, unsigned int share_access)
1315 if (share_access & NFS4_SHARE_ACCESS_WRITE) {
1316 put_write_access(filp->f_dentry->d_inode);
1317 filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE;
1322 * Recall a delegation
1325 do_recall(void *__dp)
1327 struct nfs4_delegation *dp = __dp;
1329 daemonize("nfsv4-recall");
1331 nfsd4_cb_recall(dp);
1336 * Spawn a thread to perform a recall on the delegation represented
1337 * by the lease (file_lock)
1339 * Called from break_lease() with lock_kernel() held.
1340 * Note: we assume break_lease will only call this *once* for any given
1344 void nfsd_break_deleg_cb(struct file_lock *fl)
1346 struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner;
1347 struct task_struct *t;
1349 dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl);
1353 /* We're assuming the state code never drops its reference
1354 * without first removing the lease. Since we're in this lease
1355 * callback (and since the lease code is serialized by the kernel
1356 * lock) we know the server hasn't removed the lease yet, we know
1357 * it's safe to take a reference: */
1358 atomic_inc(&dp->dl_count);
1360 spin_lock(&recall_lock);
1361 list_add_tail(&dp->dl_recall_lru, &del_recall_lru);
1362 spin_unlock(&recall_lock);
1364 /* only place dl_time is set. protected by lock_kernel*/
1365 dp->dl_time = get_seconds();
1367 /* XXX need to merge NFSD_LEASE_TIME with fs/locks.c:lease_break_time */
1368 fl->fl_break_time = jiffies + NFSD_LEASE_TIME * HZ;
1370 t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall");
1372 struct nfs4_client *clp = dp->dl_client;
1374 printk(KERN_INFO "NFSD: Callback thread failed for "
1375 "for client (clientid %08x/%08x)\n",
1376 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
1377 nfs4_put_delegation(dp);
1382 * The file_lock is being reapd.
1384 * Called by locks_free_lock() with lock_kernel() held.
1387 void nfsd_release_deleg_cb(struct file_lock *fl)
1389 struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner;
1391 dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count));
1393 if (!(fl->fl_flags & FL_LEASE) || !dp)
1395 dp->dl_flock = NULL;
1399 * Set the delegation file_lock back pointer.
1401 * Called from __setlease() with lock_kernel() held.
1404 void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl)
1406 struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner;
1408 dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp);
1415 * Called from __setlease() with lock_kernel() held
1418 int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try)
1420 struct nfs4_delegation *onlistd =
1421 (struct nfs4_delegation *)onlist->fl_owner;
1422 struct nfs4_delegation *tryd =
1423 (struct nfs4_delegation *)try->fl_owner;
1425 if (onlist->fl_lmops != try->fl_lmops)
1428 return onlistd->dl_client == tryd->dl_client;
1433 int nfsd_change_deleg_cb(struct file_lock **onlist, int arg)
1436 return lease_modify(onlist, arg);
1441 static struct lock_manager_operations nfsd_lease_mng_ops = {
1442 .fl_break = nfsd_break_deleg_cb,
1443 .fl_release_private = nfsd_release_deleg_cb,
1444 .fl_copy_lock = nfsd_copy_lock_deleg_cb,
1445 .fl_mylease = nfsd_same_client_deleg_cb,
1446 .fl_change = nfsd_change_deleg_cb,
1451 nfsd4_process_open1(struct nfsd4_open *open)
1453 clientid_t *clientid = &open->op_clientid;
1454 struct nfs4_client *clp = NULL;
1455 unsigned int strhashval;
1456 struct nfs4_stateowner *sop = NULL;
1458 if (!check_name(open->op_owner))
1459 return nfserr_inval;
1461 if (STALE_CLIENTID(&open->op_clientid))
1462 return nfserr_stale_clientid;
1464 strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner);
1465 sop = find_openstateowner_str(strhashval, open);
1466 open->op_stateowner = sop;
1468 /* Make sure the client's lease hasn't expired. */
1469 clp = find_confirmed_client(clientid);
1471 return nfserr_expired;
1474 if (!sop->so_confirmed) {
1475 /* Replace unconfirmed owners without checking for replay. */
1476 clp = sop->so_client;
1477 release_stateowner(sop);
1478 open->op_stateowner = NULL;
1481 if (open->op_seqid == sop->so_seqid - 1) {
1482 if (sop->so_replay.rp_buflen)
1483 return NFSERR_REPLAY_ME;
1484 /* The original OPEN failed so spectacularly
1485 * that we don't even have replay data saved!
1486 * Therefore, we have no choice but to continue
1487 * processing this OPEN; presumably, we'll
1488 * fail again for the same reason.
1490 dprintk("nfsd4_process_open1: replay with no replay cache\n");
1493 if (open->op_seqid != sop->so_seqid)
1494 return nfserr_bad_seqid;
1496 if (open->op_stateowner == NULL) {
1497 sop = alloc_init_open_stateowner(strhashval, clp, open);
1499 return nfserr_resource;
1500 open->op_stateowner = sop;
1502 list_del_init(&sop->so_close_lru);
1503 renew_client(sop->so_client);
1508 nfs4_check_delegmode(struct nfs4_delegation *dp, int flags)
1510 if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ))
1511 return nfserr_openmode;
1516 static struct nfs4_delegation *
1517 find_delegation_file(struct nfs4_file *fp, stateid_t *stid)
1519 struct nfs4_delegation *dp;
1521 list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) {
1522 if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid)
1529 nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open,
1530 struct nfs4_delegation **dp)
1533 int status = nfserr_bad_stateid;
1535 *dp = find_delegation_file(fp, &open->op_delegate_stateid);
1538 flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ?
1539 RD_STATE : WR_STATE;
1540 status = nfs4_check_delegmode(*dp, flags);
1544 if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR)
1548 open->op_stateowner->so_confirmed = 1;
1553 nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp)
1555 struct nfs4_stateid *local;
1556 int status = nfserr_share_denied;
1557 struct nfs4_stateowner *sop = open->op_stateowner;
1559 list_for_each_entry(local, &fp->fi_stateids, st_perfile) {
1560 /* ignore lock owners */
1561 if (local->st_stateowner->so_is_open_owner == 0)
1563 /* remember if we have seen this open owner */
1564 if (local->st_stateowner == sop)
1566 /* check for conflicting share reservations */
1567 if (!test_share(local, open))
1575 static inline struct nfs4_stateid *
1576 nfs4_alloc_stateid(void)
1578 return kmem_cache_alloc(stateid_slab, GFP_KERNEL);
1582 nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp,
1583 struct nfs4_delegation *dp,
1584 struct svc_fh *cur_fh, int flags)
1586 struct nfs4_stateid *stp;
1588 stp = nfs4_alloc_stateid();
1590 return nfserr_resource;
1593 get_file(dp->dl_vfs_file);
1594 stp->st_vfs_file = dp->dl_vfs_file;
1597 status = nfsd_open(rqstp, cur_fh, S_IFREG, flags,
1600 if (status == nfserr_dropit)
1601 status = nfserr_jukebox;
1602 kmem_cache_free(stateid_slab, stp);
1611 nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh,
1612 struct nfsd4_open *open)
1614 struct iattr iattr = {
1615 .ia_valid = ATTR_SIZE,
1618 if (!open->op_truncate)
1620 if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
1621 return nfserr_inval;
1622 return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0);
1626 nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open)
1628 struct file *filp = stp->st_vfs_file;
1629 struct inode *inode = filp->f_dentry->d_inode;
1630 unsigned int share_access, new_writer;
1633 set_access(&share_access, stp->st_access_bmap);
1634 new_writer = (~share_access) & open->op_share_access
1635 & NFS4_SHARE_ACCESS_WRITE;
1638 status = get_write_access(inode);
1640 return nfserrno(status);
1642 status = nfsd4_truncate(rqstp, cur_fh, open);
1645 put_write_access(inode);
1648 /* remember the open */
1649 filp->f_mode |= open->op_share_access;
1650 set_bit(open->op_share_access, &stp->st_access_bmap);
1651 set_bit(open->op_share_deny, &stp->st_deny_bmap);
1658 nfs4_set_claim_prev(struct nfsd4_open *open)
1660 open->op_stateowner->so_confirmed = 1;
1661 open->op_stateowner->so_client->cl_firststate = 1;
1665 * Attempt to hand out a delegation.
1668 nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp)
1670 struct nfs4_delegation *dp;
1671 struct nfs4_stateowner *sop = stp->st_stateowner;
1672 struct nfs4_callback *cb = &sop->so_client->cl_callback;
1673 struct file_lock fl, *flp = &fl;
1674 int status, flag = 0;
1676 flag = NFS4_OPEN_DELEGATE_NONE;
1677 open->op_recall = 0;
1678 switch (open->op_claim_type) {
1679 case NFS4_OPEN_CLAIM_PREVIOUS:
1680 if (!atomic_read(&cb->cb_set))
1681 open->op_recall = 1;
1682 flag = open->op_delegate_type;
1683 if (flag == NFS4_OPEN_DELEGATE_NONE)
1686 case NFS4_OPEN_CLAIM_NULL:
1687 /* Let's not give out any delegations till everyone's
1688 * had the chance to reclaim theirs.... */
1689 if (nfs4_in_grace())
1691 if (!atomic_read(&cb->cb_set) || !sop->so_confirmed)
1693 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
1694 flag = NFS4_OPEN_DELEGATE_WRITE;
1696 flag = NFS4_OPEN_DELEGATE_READ;
1702 dp = alloc_init_deleg(sop->so_client, stp, fh, flag);
1704 flag = NFS4_OPEN_DELEGATE_NONE;
1707 locks_init_lock(&fl);
1708 fl.fl_lmops = &nfsd_lease_mng_ops;
1709 fl.fl_flags = FL_LEASE;
1710 fl.fl_end = OFFSET_MAX;
1711 fl.fl_owner = (fl_owner_t)dp;
1712 fl.fl_file = stp->st_vfs_file;
1713 fl.fl_pid = current->tgid;
1715 /* setlease checks to see if delegation should be handed out.
1716 * the lock_manager callbacks fl_mylease and fl_change are used
1718 if ((status = setlease(stp->st_vfs_file,
1719 flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK, &flp))) {
1720 dprintk("NFSD: setlease failed [%d], no delegation\n", status);
1721 unhash_delegation(dp);
1722 flag = NFS4_OPEN_DELEGATE_NONE;
1726 memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid));
1728 dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n",
1729 dp->dl_stateid.si_boot,
1730 dp->dl_stateid.si_stateownerid,
1731 dp->dl_stateid.si_fileid,
1732 dp->dl_stateid.si_generation);
1734 if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS
1735 && flag == NFS4_OPEN_DELEGATE_NONE
1736 && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE)
1737 printk("NFSD: WARNING: refusing delegation reclaim\n");
1738 open->op_delegate_type = flag;
1742 * called with nfs4_lock_state() held.
1745 nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
1747 struct nfs4_file *fp = NULL;
1748 struct inode *ino = current_fh->fh_dentry->d_inode;
1749 struct nfs4_stateid *stp = NULL;
1750 struct nfs4_delegation *dp = NULL;
1753 status = nfserr_inval;
1754 if (!access_valid(open->op_share_access)
1755 || !deny_valid(open->op_share_deny))
1758 * Lookup file; if found, lookup stateid and check open request,
1759 * and check for delegations in the process of being recalled.
1760 * If not found, create the nfs4_file struct
1762 fp = find_file(ino);
1764 if ((status = nfs4_check_open(fp, open, &stp)))
1766 status = nfs4_check_deleg(fp, open, &dp);
1770 status = nfserr_bad_stateid;
1771 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
1773 status = nfserr_resource;
1774 fp = alloc_init_file(ino);
1780 * OPEN the file, or upgrade an existing OPEN.
1781 * If truncate fails, the OPEN fails.
1784 /* Stateid was found, this is an OPEN upgrade */
1785 status = nfs4_upgrade_open(rqstp, current_fh, stp, open);
1788 update_stateid(&stp->st_stateid);
1790 /* Stateid was not found, this is a new OPEN */
1792 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
1794 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
1796 status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags);
1799 init_stateid(stp, fp, open);
1800 status = nfsd4_truncate(rqstp, current_fh, open);
1802 release_stateid(stp, OPEN_STATE);
1806 memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t));
1809 * Attempt to hand out a delegation. No error return, because the
1810 * OPEN succeeds even if we fail.
1812 nfs4_open_delegation(current_fh, open, stp);
1816 dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n",
1817 stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid,
1818 stp->st_stateid.si_fileid, stp->st_stateid.si_generation);
1822 if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
1823 nfs4_set_claim_prev(open);
1825 * To finish the open response, we just need to set the rflags.
1827 open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX;
1828 if (!open->op_stateowner->so_confirmed)
1829 open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM;
1834 static struct workqueue_struct *laundry_wq;
1835 static struct work_struct laundromat_work;
1836 static void laundromat_main(void *);
1837 static DECLARE_WORK(laundromat_work, laundromat_main, NULL);
1840 nfsd4_renew(clientid_t *clid)
1842 struct nfs4_client *clp;
1846 dprintk("process_renew(%08x/%08x): starting\n",
1847 clid->cl_boot, clid->cl_id);
1848 status = nfserr_stale_clientid;
1849 if (STALE_CLIENTID(clid))
1851 clp = find_confirmed_client(clid);
1852 status = nfserr_expired;
1854 /* We assume the client took too long to RENEW. */
1855 dprintk("nfsd4_renew: clientid not found!\n");
1859 status = nfserr_cb_path_down;
1860 if (!list_empty(&clp->cl_delegations)
1861 && !atomic_read(&clp->cl_callback.cb_set))
1865 nfs4_unlock_state();
1872 dprintk("NFSD: end of grace period\n");
1873 nfsd4_recdir_purge_old();
1878 nfs4_laundromat(void)
1880 struct nfs4_client *clp;
1881 struct nfs4_stateowner *sop;
1882 struct nfs4_delegation *dp;
1883 struct list_head *pos, *next, reaplist;
1884 time_t cutoff = get_seconds() - NFSD_LEASE_TIME;
1885 time_t t, clientid_val = NFSD_LEASE_TIME;
1886 time_t u, test_val = NFSD_LEASE_TIME;
1890 dprintk("NFSD: laundromat service - starting\n");
1893 list_for_each_safe(pos, next, &client_lru) {
1894 clp = list_entry(pos, struct nfs4_client, cl_lru);
1895 if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) {
1896 t = clp->cl_time - cutoff;
1897 if (clientid_val > t)
1901 dprintk("NFSD: purging unused client (clientid %08x)\n",
1902 clp->cl_clientid.cl_id);
1903 nfsd4_remove_clid_dir(clp);
1906 INIT_LIST_HEAD(&reaplist);
1907 spin_lock(&recall_lock);
1908 list_for_each_safe(pos, next, &del_recall_lru) {
1909 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
1910 if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) {
1911 u = dp->dl_time - cutoff;
1916 dprintk("NFSD: purging unused delegation dp %p, fp %p\n",
1918 list_move(&dp->dl_recall_lru, &reaplist);
1920 spin_unlock(&recall_lock);
1921 list_for_each_safe(pos, next, &reaplist) {
1922 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
1923 list_del_init(&dp->dl_recall_lru);
1924 unhash_delegation(dp);
1926 test_val = NFSD_LEASE_TIME;
1927 list_for_each_safe(pos, next, &close_lru) {
1928 sop = list_entry(pos, struct nfs4_stateowner, so_close_lru);
1929 if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) {
1930 u = sop->so_time - cutoff;
1935 dprintk("NFSD: purging unused open stateowner (so_id %d)\n",
1937 release_stateowner(sop);
1939 if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT)
1940 clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT;
1941 nfs4_unlock_state();
1942 return clientid_val;
1946 laundromat_main(void *not_used)
1950 t = nfs4_laundromat();
1951 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t);
1952 queue_delayed_work(laundry_wq, &laundromat_work, t*HZ);
1955 static struct nfs4_stateowner *
1956 search_close_lru(u32 st_id, int flags)
1958 struct nfs4_stateowner *local = NULL;
1960 if (flags & CLOSE_STATE) {
1961 list_for_each_entry(local, &close_lru, so_close_lru) {
1962 if (local->so_id == st_id)
1970 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp)
1972 return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_dentry->d_inode;
1976 STALE_STATEID(stateid_t *stateid)
1978 if (stateid->si_boot == boot_time)
1980 dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n",
1981 stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid,
1982 stateid->si_generation);
1987 access_permit_read(unsigned long access_bmap)
1989 return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) ||
1990 test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) ||
1991 test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap);
1995 access_permit_write(unsigned long access_bmap)
1997 return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) ||
1998 test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap);
2002 int nfs4_check_openmode(struct nfs4_stateid *stp, int flags)
2004 int status = nfserr_openmode;
2006 if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap)))
2008 if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap)))
2016 check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags)
2018 /* Trying to call delegreturn with a special stateid? Yuch: */
2019 if (!(flags & (RD_STATE | WR_STATE)))
2020 return nfserr_bad_stateid;
2021 else if (ONE_STATEID(stateid) && (flags & RD_STATE))
2023 else if (nfs4_in_grace()) {
2024 /* Answer in remaining cases depends on existance of
2025 * conflicting state; so we must wait out the grace period. */
2026 return nfserr_grace;
2027 } else if (flags & WR_STATE)
2028 return nfs4_share_conflict(current_fh,
2029 NFS4_SHARE_DENY_WRITE);
2030 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
2031 return nfs4_share_conflict(current_fh,
2032 NFS4_SHARE_DENY_READ);
2036 * Allow READ/WRITE during grace period on recovered state only for files
2037 * that are not able to provide mandatory locking.
2040 io_during_grace_disallowed(struct inode *inode, int flags)
2042 return nfs4_in_grace() && (flags & (RD_STATE | WR_STATE))
2043 && MANDATORY_LOCK(inode);
2047 * Checks for stateid operations
2050 nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp)
2052 struct nfs4_stateid *stp = NULL;
2053 struct nfs4_delegation *dp = NULL;
2055 struct inode *ino = current_fh->fh_dentry->d_inode;
2058 dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n",
2059 stateid->si_boot, stateid->si_stateownerid,
2060 stateid->si_fileid, stateid->si_generation);
2064 if (io_during_grace_disallowed(ino, flags))
2065 return nfserr_grace;
2067 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
2068 return check_special_stateids(current_fh, stateid, flags);
2071 status = nfserr_stale_stateid;
2072 if (STALE_STATEID(stateid))
2076 status = nfserr_bad_stateid;
2077 if (!stateid->si_fileid) { /* delegation stateid */
2078 if(!(dp = find_delegation_stateid(ino, stateid))) {
2079 dprintk("NFSD: delegation stateid not found\n");
2082 stidp = &dp->dl_stateid;
2083 } else { /* open or lock stateid */
2084 if (!(stp = find_stateid(stateid, flags))) {
2085 dprintk("NFSD: open or lock stateid not found\n");
2088 if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp))
2090 if (!stp->st_stateowner->so_confirmed)
2092 stidp = &stp->st_stateid;
2094 if (stateid->si_generation > stidp->si_generation)
2098 status = nfserr_old_stateid;
2099 if (stateid->si_generation < stidp->si_generation)
2102 if ((status = nfs4_check_openmode(stp,flags)))
2104 renew_client(stp->st_stateowner->so_client);
2106 *filpp = stp->st_vfs_file;
2108 if ((status = nfs4_check_delegmode(dp, flags)))
2110 renew_client(dp->dl_client);
2111 if (flags & DELEG_RET)
2112 unhash_delegation(dp);
2114 *filpp = dp->dl_vfs_file;
2124 return (type == NFS4_READW_LT || type == NFS4_READ_LT) ?
2125 RD_STATE : WR_STATE;
2129 * Checks for sequence id mutating operations.
2132 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)
2134 struct nfs4_stateid *stp;
2135 struct nfs4_stateowner *sop;
2137 dprintk("NFSD: preprocess_seqid_op: seqid=%d "
2138 "stateid = (%08x/%08x/%08x/%08x)\n", seqid,
2139 stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid,
2140 stateid->si_generation);
2145 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) {
2146 printk("NFSD: preprocess_seqid_op: magic stateid!\n");
2147 return nfserr_bad_stateid;
2150 if (STALE_STATEID(stateid))
2151 return nfserr_stale_stateid;
2153 * We return BAD_STATEID if filehandle doesn't match stateid,
2154 * the confirmed flag is incorrecly set, or the generation
2155 * number is incorrect.
2157 stp = find_stateid(stateid, flags);
2160 * Also, we should make sure this isn't just the result of
2163 sop = search_close_lru(stateid->si_stateownerid, flags);
2165 return nfserr_bad_stateid;
2171 struct nfs4_stateowner *sop = stp->st_stateowner;
2172 clientid_t *lockclid = &lock->v.new.clientid;
2173 struct nfs4_client *clp = sop->so_client;
2177 lkflg = setlkflg(lock->lk_type);
2179 if (lock->lk_is_new) {
2180 if (!sop->so_is_open_owner)
2181 return nfserr_bad_stateid;
2182 if (!cmp_clid(&clp->cl_clientid, lockclid))
2183 return nfserr_bad_stateid;
2184 /* stp is the open stateid */
2185 status = nfs4_check_openmode(stp, lkflg);
2189 /* stp is the lock stateid */
2190 status = nfs4_check_openmode(stp->st_openstp, lkflg);
2197 if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) {
2198 printk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n");
2199 return nfserr_bad_stateid;
2203 *sopp = sop = stp->st_stateowner;
2206 * We now validate the seqid and stateid generation numbers.
2207 * For the moment, we ignore the possibility of
2208 * generation number wraparound.
2210 if (seqid != sop->so_seqid)
2213 if (sop->so_confirmed && flags & CONFIRM) {
2214 printk("NFSD: preprocess_seqid_op: expected"
2215 " unconfirmed stateowner!\n");
2216 return nfserr_bad_stateid;
2218 if (!sop->so_confirmed && !(flags & CONFIRM)) {
2219 printk("NFSD: preprocess_seqid_op: stateowner not"
2220 " confirmed yet!\n");
2221 return nfserr_bad_stateid;
2223 if (stateid->si_generation > stp->st_stateid.si_generation) {
2224 printk("NFSD: preprocess_seqid_op: future stateid?!\n");
2225 return nfserr_bad_stateid;
2228 if (stateid->si_generation < stp->st_stateid.si_generation) {
2229 printk("NFSD: preprocess_seqid_op: old stateid!\n");
2230 return nfserr_old_stateid;
2232 renew_client(sop->so_client);
2236 if (seqid == sop->so_seqid - 1) {
2237 dprintk("NFSD: preprocess_seqid_op: retransmission?\n");
2238 /* indicate replay to calling function */
2239 return NFSERR_REPLAY_ME;
2241 printk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n",
2242 sop->so_seqid, seqid);
2244 return nfserr_bad_seqid;
2248 nfsd4_open_confirm(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_confirm *oc, struct nfs4_stateowner **replay_owner)
2251 struct nfs4_stateowner *sop;
2252 struct nfs4_stateid *stp;
2254 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
2255 (int)current_fh->fh_dentry->d_name.len,
2256 current_fh->fh_dentry->d_name.name);
2258 status = fh_verify(rqstp, current_fh, S_IFREG, 0);
2264 if ((status = nfs4_preprocess_seqid_op(current_fh, oc->oc_seqid,
2265 &oc->oc_req_stateid,
2266 CHECK_FH | CONFIRM | OPEN_STATE,
2267 &oc->oc_stateowner, &stp, NULL)))
2270 sop = oc->oc_stateowner;
2271 sop->so_confirmed = 1;
2272 update_stateid(&stp->st_stateid);
2273 memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t));
2274 dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d "
2275 "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid,
2276 stp->st_stateid.si_boot,
2277 stp->st_stateid.si_stateownerid,
2278 stp->st_stateid.si_fileid,
2279 stp->st_stateid.si_generation);
2281 nfsd4_create_clid_dir(sop->so_client);
2283 if (oc->oc_stateowner) {
2284 nfs4_get_stateowner(oc->oc_stateowner);
2285 *replay_owner = oc->oc_stateowner;
2287 nfs4_unlock_state();
2293 * unset all bits in union bitmap (bmap) that
2294 * do not exist in share (from successful OPEN_DOWNGRADE)
2297 reset_union_bmap_access(unsigned long access, unsigned long *bmap)
2300 for (i = 1; i < 4; i++) {
2301 if ((i & access) != i)
2302 __clear_bit(i, bmap);
2307 reset_union_bmap_deny(unsigned long deny, unsigned long *bmap)
2310 for (i = 0; i < 4; i++) {
2311 if ((i & deny) != i)
2312 __clear_bit(i, bmap);
2317 nfsd4_open_downgrade(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_downgrade *od, struct nfs4_stateowner **replay_owner)
2320 struct nfs4_stateid *stp;
2321 unsigned int share_access;
2323 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
2324 (int)current_fh->fh_dentry->d_name.len,
2325 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(current_fh, od->od_seqid,
2334 CHECK_FH | OPEN_STATE,
2335 &od->od_stateowner, &stp, NULL)))
2338 status = nfserr_inval;
2339 if (!test_bit(od->od_share_access, &stp->st_access_bmap)) {
2340 dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n",
2341 stp->st_access_bmap, od->od_share_access);
2344 if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) {
2345 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
2346 stp->st_deny_bmap, od->od_share_deny);
2349 set_access(&share_access, stp->st_access_bmap);
2350 nfs4_file_downgrade(stp->st_vfs_file,
2351 share_access & ~od->od_share_access);
2353 reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap);
2354 reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap);
2356 update_stateid(&stp->st_stateid);
2357 memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t));
2360 if (od->od_stateowner) {
2361 nfs4_get_stateowner(od->od_stateowner);
2362 *replay_owner = od->od_stateowner;
2364 nfs4_unlock_state();
2369 * nfs4_unlock_state() called after encode
2372 nfsd4_close(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_close *close, struct nfs4_stateowner **replay_owner)
2375 struct nfs4_stateid *stp;
2377 dprintk("NFSD: nfsd4_close on file %.*s\n",
2378 (int)current_fh->fh_dentry->d_name.len,
2379 current_fh->fh_dentry->d_name.name);
2382 /* check close_lru for replay */
2383 if ((status = nfs4_preprocess_seqid_op(current_fh, close->cl_seqid,
2385 CHECK_FH | OPEN_STATE | CLOSE_STATE,
2386 &close->cl_stateowner, &stp, NULL)))
2389 update_stateid(&stp->st_stateid);
2390 memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t));
2392 /* release_stateid() calls nfsd_close() if needed */
2393 release_stateid(stp, OPEN_STATE);
2395 /* place unused nfs4_stateowners on so_close_lru list to be
2396 * released by the laundromat service after the lease period
2397 * to enable us to handle CLOSE replay
2399 if (list_empty(&close->cl_stateowner->so_stateids))
2400 move_to_close_lru(close->cl_stateowner);
2402 if (close->cl_stateowner) {
2403 nfs4_get_stateowner(close->cl_stateowner);
2404 *replay_owner = close->cl_stateowner;
2406 nfs4_unlock_state();
2411 nfsd4_delegreturn(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_delegreturn *dr)
2415 if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0)))
2419 status = nfs4_preprocess_stateid_op(current_fh, &dr->dr_stateid, DELEG_RET, NULL);
2420 nfs4_unlock_state();
2427 * Lock owner state (byte-range locks)
2429 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
2430 #define LOCK_HASH_BITS 8
2431 #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS)
2432 #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1)
2434 #define lockownerid_hashval(id) \
2435 ((id) & LOCK_HASH_MASK)
2437 static inline unsigned int
2438 lock_ownerstr_hashval(struct inode *inode, u32 cl_id,
2439 struct xdr_netobj *ownername)
2441 return (file_hashval(inode) + cl_id
2442 + opaque_hashval(ownername->data, ownername->len))
2446 static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE];
2447 static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE];
2448 static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE];
2450 static struct nfs4_stateid *
2451 find_stateid(stateid_t *stid, int flags)
2453 struct nfs4_stateid *local = NULL;
2454 u32 st_id = stid->si_stateownerid;
2455 u32 f_id = stid->si_fileid;
2456 unsigned int hashval;
2458 dprintk("NFSD: find_stateid flags 0x%x\n",flags);
2459 if ((flags & LOCK_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) {
2460 hashval = stateid_hashval(st_id, f_id);
2461 list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) {
2462 if ((local->st_stateid.si_stateownerid == st_id) &&
2463 (local->st_stateid.si_fileid == f_id))
2467 if ((flags & OPEN_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) {
2468 hashval = stateid_hashval(st_id, f_id);
2469 list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) {
2470 if ((local->st_stateid.si_stateownerid == st_id) &&
2471 (local->st_stateid.si_fileid == f_id))
2478 static struct nfs4_delegation *
2479 find_delegation_stateid(struct inode *ino, stateid_t *stid)
2481 struct nfs4_file *fp;
2482 struct nfs4_delegation *dl;
2484 dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n",
2485 stid->si_boot, stid->si_stateownerid,
2486 stid->si_fileid, stid->si_generation);
2488 fp = find_file(ino);
2491 dl = find_delegation_file(fp, stid);
2497 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
2498 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
2499 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
2500 * locking, this prevents us from being completely protocol-compliant. The
2501 * real solution to this problem is to start using unsigned file offsets in
2502 * the VFS, but this is a very deep change!
2505 nfs4_transform_lock_offset(struct file_lock *lock)
2507 if (lock->fl_start < 0)
2508 lock->fl_start = OFFSET_MAX;
2509 if (lock->fl_end < 0)
2510 lock->fl_end = OFFSET_MAX;
2513 /* Hack!: For now, we're defining this just so we can use a pointer to it
2514 * as a unique cookie to identify our (NFSv4's) posix locks. */
2515 static struct lock_manager_operations nfsd_posix_mng_ops = {
2519 nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny)
2521 struct nfs4_stateowner *sop;
2524 if (fl->fl_lmops == &nfsd_posix_mng_ops) {
2525 sop = (struct nfs4_stateowner *) fl->fl_owner;
2526 hval = lockownerid_hashval(sop->so_id);
2527 kref_get(&sop->so_ref);
2529 deny->ld_clientid = sop->so_client->cl_clientid;
2531 deny->ld_sop = NULL;
2532 deny->ld_clientid.cl_boot = 0;
2533 deny->ld_clientid.cl_id = 0;
2535 deny->ld_start = fl->fl_start;
2536 deny->ld_length = ~(u64)0;
2537 if (fl->fl_end != ~(u64)0)
2538 deny->ld_length = fl->fl_end - fl->fl_start + 1;
2539 deny->ld_type = NFS4_READ_LT;
2540 if (fl->fl_type != F_RDLCK)
2541 deny->ld_type = NFS4_WRITE_LT;
2544 static struct nfs4_stateowner *
2545 find_lockstateowner_str(struct inode *inode, clientid_t *clid,
2546 struct xdr_netobj *owner)
2548 unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner);
2549 struct nfs4_stateowner *op;
2551 list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) {
2552 if (cmp_owner_str(op, owner, clid))
2559 * Alloc a lock owner structure.
2560 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
2563 * strhashval = lock_ownerstr_hashval
2566 static struct nfs4_stateowner *
2567 alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) {
2568 struct nfs4_stateowner *sop;
2569 struct nfs4_replay *rp;
2570 unsigned int idhashval;
2572 if (!(sop = alloc_stateowner(&lock->lk_new_owner)))
2574 idhashval = lockownerid_hashval(current_ownerid);
2575 INIT_LIST_HEAD(&sop->so_idhash);
2576 INIT_LIST_HEAD(&sop->so_strhash);
2577 INIT_LIST_HEAD(&sop->so_perclient);
2578 INIT_LIST_HEAD(&sop->so_stateids);
2579 INIT_LIST_HEAD(&sop->so_perstateid);
2580 INIT_LIST_HEAD(&sop->so_close_lru); /* not used */
2582 list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]);
2583 list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]);
2584 list_add(&sop->so_perstateid, &open_stp->st_lockowners);
2585 sop->so_is_open_owner = 0;
2586 sop->so_id = current_ownerid++;
2587 sop->so_client = clp;
2588 /* It is the openowner seqid that will be incremented in encode in the
2589 * case of new lockowners; so increment the lock seqid manually: */
2590 sop->so_seqid = lock->lk_new_lock_seqid + 1;
2591 sop->so_confirmed = 1;
2592 rp = &sop->so_replay;
2593 rp->rp_status = nfserr_serverfault;
2595 rp->rp_buf = rp->rp_ibuf;
2599 static struct nfs4_stateid *
2600 alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp)
2602 struct nfs4_stateid *stp;
2603 unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id);
2605 stp = nfs4_alloc_stateid();
2608 INIT_LIST_HEAD(&stp->st_hash);
2609 INIT_LIST_HEAD(&stp->st_perfile);
2610 INIT_LIST_HEAD(&stp->st_perstateowner);
2611 INIT_LIST_HEAD(&stp->st_lockowners); /* not used */
2612 list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]);
2613 list_add(&stp->st_perfile, &fp->fi_stateids);
2614 list_add(&stp->st_perstateowner, &sop->so_stateids);
2615 stp->st_stateowner = sop;
2618 stp->st_stateid.si_boot = boot_time;
2619 stp->st_stateid.si_stateownerid = sop->so_id;
2620 stp->st_stateid.si_fileid = fp->fi_id;
2621 stp->st_stateid.si_generation = 0;
2622 stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */
2623 stp->st_access_bmap = open_stp->st_access_bmap;
2624 stp->st_deny_bmap = open_stp->st_deny_bmap;
2625 stp->st_openstp = open_stp;
2632 check_lock_length(u64 offset, u64 length)
2634 return ((length == 0) || ((length != ~(u64)0) &&
2635 LOFF_OVERFLOW(offset, length)));
2642 nfsd4_lock(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lock *lock, struct nfs4_stateowner **replay_owner)
2644 struct nfs4_stateowner *open_sop = NULL;
2645 struct nfs4_stateowner *lock_sop = NULL;
2646 struct nfs4_stateid *lock_stp;
2648 struct file_lock file_lock;
2649 struct file_lock conflock;
2651 unsigned int strhashval;
2653 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
2654 (long long) lock->lk_offset,
2655 (long long) lock->lk_length);
2657 if (check_lock_length(lock->lk_offset, lock->lk_length))
2658 return nfserr_inval;
2660 if ((status = fh_verify(rqstp, current_fh, S_IFREG, MAY_LOCK))) {
2661 dprintk("NFSD: nfsd4_lock: permission denied!\n");
2667 if (lock->lk_is_new) {
2669 * Client indicates that this is a new lockowner.
2670 * Use open owner and open stateid to create lock owner and
2673 struct nfs4_stateid *open_stp = NULL;
2674 struct nfs4_file *fp;
2676 status = nfserr_stale_clientid;
2677 if (STALE_CLIENTID(&lock->lk_new_clientid))
2680 /* validate and update open stateid and open seqid */
2681 status = nfs4_preprocess_seqid_op(current_fh,
2682 lock->lk_new_open_seqid,
2683 &lock->lk_new_open_stateid,
2684 CHECK_FH | OPEN_STATE,
2685 &lock->lk_replay_owner, &open_stp,
2689 open_sop = lock->lk_replay_owner;
2690 /* create lockowner and lock stateid */
2691 fp = open_stp->st_file;
2692 strhashval = lock_ownerstr_hashval(fp->fi_inode,
2693 open_sop->so_client->cl_clientid.cl_id,
2694 &lock->v.new.owner);
2695 /* XXX: Do we need to check for duplicate stateowners on
2696 * the same file, or should they just be allowed (and
2697 * create new stateids)? */
2698 status = nfserr_resource;
2699 lock_sop = alloc_init_lock_stateowner(strhashval,
2700 open_sop->so_client, open_stp, lock);
2701 if (lock_sop == NULL)
2703 lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp);
2704 if (lock_stp == NULL)
2707 /* lock (lock owner + lock stateid) already exists */
2708 status = nfs4_preprocess_seqid_op(current_fh,
2709 lock->lk_old_lock_seqid,
2710 &lock->lk_old_lock_stateid,
2711 CHECK_FH | LOCK_STATE,
2712 &lock->lk_replay_owner, &lock_stp, lock);
2715 lock_sop = lock->lk_replay_owner;
2717 /* lock->lk_replay_owner and lock_stp have been created or found */
2718 filp = lock_stp->st_vfs_file;
2720 status = nfserr_grace;
2721 if (nfs4_in_grace() && !lock->lk_reclaim)
2723 status = nfserr_no_grace;
2724 if (!nfs4_in_grace() && lock->lk_reclaim)
2727 locks_init_lock(&file_lock);
2728 switch (lock->lk_type) {
2731 file_lock.fl_type = F_RDLCK;
2734 case NFS4_WRITEW_LT:
2735 file_lock.fl_type = F_WRLCK;
2738 status = nfserr_inval;
2741 file_lock.fl_owner = (fl_owner_t)lock_sop;
2742 file_lock.fl_pid = current->tgid;
2743 file_lock.fl_file = filp;
2744 file_lock.fl_flags = FL_POSIX;
2745 file_lock.fl_lmops = &nfsd_posix_mng_ops;
2747 file_lock.fl_start = lock->lk_offset;
2748 if ((lock->lk_length == ~(u64)0) ||
2749 LOFF_OVERFLOW(lock->lk_offset, lock->lk_length))
2750 file_lock.fl_end = ~(u64)0;
2752 file_lock.fl_end = lock->lk_offset + lock->lk_length - 1;
2753 nfs4_transform_lock_offset(&file_lock);
2756 * Try to lock the file in the VFS.
2757 * Note: locks.c uses the BKL to protect the inode's lock list.
2760 /* XXX?: Just to divert the locks_release_private at the start of
2761 * locks_copy_lock: */
2762 conflock.fl_ops = NULL;
2763 conflock.fl_lmops = NULL;
2764 status = posix_lock_file_conf(filp, &file_lock, &conflock);
2765 dprintk("NFSD: nfsd4_lock: posix_lock_file_conf status %d\n",status);
2767 case 0: /* success! */
2768 update_stateid(&lock_stp->st_stateid);
2769 memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid,
2772 case (EAGAIN): /* conflock holds conflicting lock */
2773 status = nfserr_denied;
2774 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
2775 nfs4_set_lock_denied(&conflock, &lock->lk_denied);
2778 status = nfserr_deadlock;
2781 dprintk("NFSD: nfsd4_lock: posix_lock_file_conf() failed! status %d\n",status);
2782 status = nfserr_resource;
2786 if (status && lock->lk_is_new && lock_sop)
2787 release_stateowner(lock_sop);
2788 if (lock->lk_replay_owner) {
2789 nfs4_get_stateowner(lock->lk_replay_owner);
2790 *replay_owner = lock->lk_replay_owner;
2792 nfs4_unlock_state();
2800 nfsd4_lockt(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lockt *lockt)
2802 struct inode *inode;
2804 struct file_lock file_lock;
2805 struct file_lock conflock;
2808 if (nfs4_in_grace())
2809 return nfserr_grace;
2811 if (check_lock_length(lockt->lt_offset, lockt->lt_length))
2812 return nfserr_inval;
2814 lockt->lt_stateowner = NULL;
2817 status = nfserr_stale_clientid;
2818 if (STALE_CLIENTID(&lockt->lt_clientid))
2821 if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0))) {
2822 dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n");
2823 if (status == nfserr_symlink)
2824 status = nfserr_inval;
2828 inode = current_fh->fh_dentry->d_inode;
2829 locks_init_lock(&file_lock);
2830 switch (lockt->lt_type) {
2833 file_lock.fl_type = F_RDLCK;
2836 case NFS4_WRITEW_LT:
2837 file_lock.fl_type = F_WRLCK;
2840 printk("NFSD: nfs4_lockt: bad lock type!\n");
2841 status = nfserr_inval;
2845 lockt->lt_stateowner = find_lockstateowner_str(inode,
2846 &lockt->lt_clientid, &lockt->lt_owner);
2847 if (lockt->lt_stateowner)
2848 file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner;
2849 file_lock.fl_pid = current->tgid;
2850 file_lock.fl_flags = FL_POSIX;
2851 file_lock.fl_lmops = &nfsd_posix_mng_ops;
2853 file_lock.fl_start = lockt->lt_offset;
2854 if ((lockt->lt_length == ~(u64)0) || LOFF_OVERFLOW(lockt->lt_offset, lockt->lt_length))
2855 file_lock.fl_end = ~(u64)0;
2857 file_lock.fl_end = lockt->lt_offset + lockt->lt_length - 1;
2859 nfs4_transform_lock_offset(&file_lock);
2861 /* posix_test_lock uses the struct file _only_ to resolve the inode.
2862 * since LOCKT doesn't require an OPEN, and therefore a struct
2863 * file may not exist, pass posix_test_lock a struct file with
2864 * only the dentry:inode set.
2866 memset(&file, 0, sizeof (struct file));
2867 file.f_dentry = current_fh->fh_dentry;
2870 if (posix_test_lock(&file, &file_lock, &conflock)) {
2871 status = nfserr_denied;
2872 nfs4_set_lock_denied(&conflock, &lockt->lt_denied);
2875 nfs4_unlock_state();
2880 nfsd4_locku(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_locku *locku, struct nfs4_stateowner **replay_owner)
2882 struct nfs4_stateid *stp;
2883 struct file *filp = NULL;
2884 struct file_lock file_lock;
2887 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
2888 (long long) locku->lu_offset,
2889 (long long) locku->lu_length);
2891 if (check_lock_length(locku->lu_offset, locku->lu_length))
2892 return nfserr_inval;
2896 if ((status = nfs4_preprocess_seqid_op(current_fh,
2899 CHECK_FH | LOCK_STATE,
2900 &locku->lu_stateowner, &stp, NULL)))
2903 filp = stp->st_vfs_file;
2905 locks_init_lock(&file_lock);
2906 file_lock.fl_type = F_UNLCK;
2907 file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner;
2908 file_lock.fl_pid = current->tgid;
2909 file_lock.fl_file = filp;
2910 file_lock.fl_flags = FL_POSIX;
2911 file_lock.fl_lmops = &nfsd_posix_mng_ops;
2912 file_lock.fl_start = locku->lu_offset;
2914 if ((locku->lu_length == ~(u64)0) || LOFF_OVERFLOW(locku->lu_offset, locku->lu_length))
2915 file_lock.fl_end = ~(u64)0;
2917 file_lock.fl_end = locku->lu_offset + locku->lu_length - 1;
2918 nfs4_transform_lock_offset(&file_lock);
2921 * Try to unlock the file in the VFS.
2923 status = posix_lock_file(filp, &file_lock);
2925 dprintk("NFSD: nfs4_locku: posix_lock_file failed!\n");
2929 * OK, unlock succeeded; the only thing left to do is update the stateid.
2931 update_stateid(&stp->st_stateid);
2932 memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t));
2935 if (locku->lu_stateowner) {
2936 nfs4_get_stateowner(locku->lu_stateowner);
2937 *replay_owner = locku->lu_stateowner;
2939 nfs4_unlock_state();
2943 status = nfserrno(status);
2949 * 1: locks held by lockowner
2950 * 0: no locks held by lockowner
2953 check_for_locks(struct file *filp, struct nfs4_stateowner *lowner)
2955 struct file_lock **flpp;
2956 struct inode *inode = filp->f_dentry->d_inode;
2960 for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) {
2961 if ((*flpp)->fl_owner == (fl_owner_t)lowner) {
2972 nfsd4_release_lockowner(struct svc_rqst *rqstp, struct nfsd4_release_lockowner *rlockowner)
2974 clientid_t *clid = &rlockowner->rl_clientid;
2975 struct nfs4_stateowner *sop;
2976 struct nfs4_stateid *stp;
2977 struct xdr_netobj *owner = &rlockowner->rl_owner;
2978 struct list_head matches;
2982 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
2983 clid->cl_boot, clid->cl_id);
2985 /* XXX check for lease expiration */
2987 status = nfserr_stale_clientid;
2988 if (STALE_CLIENTID(clid))
2993 status = nfserr_locks_held;
2994 /* XXX: we're doing a linear search through all the lockowners.
2995 * Yipes! For now we'll just hope clients aren't really using
2996 * release_lockowner much, but eventually we have to fix these
2997 * data structures. */
2998 INIT_LIST_HEAD(&matches);
2999 for (i = 0; i < LOCK_HASH_SIZE; i++) {
3000 list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) {
3001 if (!cmp_owner_str(sop, owner, clid))
3003 list_for_each_entry(stp, &sop->so_stateids,
3005 if (check_for_locks(stp->st_vfs_file, sop))
3007 /* Note: so_perclient unused for lockowners,
3008 * so it's OK to fool with here. */
3009 list_add(&sop->so_perclient, &matches);
3013 /* Clients probably won't expect us to return with some (but not all)
3014 * of the lockowner state released; so don't release any until all
3015 * have been checked. */
3017 while (!list_empty(&matches)) {
3018 sop = list_entry(matches.next, struct nfs4_stateowner,
3020 /* unhash_stateowner deletes so_perclient only
3021 * for openowners. */
3022 list_del(&sop->so_perclient);
3023 release_stateowner(sop);
3026 nfs4_unlock_state();
3030 static inline struct nfs4_client_reclaim *
3033 return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL);
3037 nfs4_has_reclaimed_state(const char *name)
3039 unsigned int strhashval = clientstr_hashval(name);
3040 struct nfs4_client *clp;
3042 clp = find_confirmed_client_by_str(name, strhashval);
3047 * failure => all reset bets are off, nfserr_no_grace...
3050 nfs4_client_to_reclaim(const char *name)
3052 unsigned int strhashval;
3053 struct nfs4_client_reclaim *crp = NULL;
3055 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name);
3056 crp = alloc_reclaim();
3059 strhashval = clientstr_hashval(name);
3060 INIT_LIST_HEAD(&crp->cr_strhash);
3061 list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]);
3062 memcpy(crp->cr_recdir, name, HEXDIR_LEN);
3063 reclaim_str_hashtbl_size++;
3068 nfs4_release_reclaim(void)
3070 struct nfs4_client_reclaim *crp = NULL;
3073 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
3074 while (!list_empty(&reclaim_str_hashtbl[i])) {
3075 crp = list_entry(reclaim_str_hashtbl[i].next,
3076 struct nfs4_client_reclaim, cr_strhash);
3077 list_del(&crp->cr_strhash);
3079 reclaim_str_hashtbl_size--;
3082 BUG_ON(reclaim_str_hashtbl_size);
3086 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
3087 static struct nfs4_client_reclaim *
3088 nfs4_find_reclaim_client(clientid_t *clid)
3090 unsigned int strhashval;
3091 struct nfs4_client *clp;
3092 struct nfs4_client_reclaim *crp = NULL;
3095 /* find clientid in conf_id_hashtbl */
3096 clp = find_confirmed_client(clid);
3100 dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n",
3101 clp->cl_name.len, clp->cl_name.data,
3104 /* find clp->cl_name in reclaim_str_hashtbl */
3105 strhashval = clientstr_hashval(clp->cl_recdir);
3106 list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) {
3107 if (same_name(crp->cr_recdir, clp->cl_recdir)) {
3115 * Called from OPEN. Look for clientid in reclaim list.
3118 nfs4_check_open_reclaim(clientid_t *clid)
3120 return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad;
3123 /* initialization to perform at module load time: */
3126 nfs4_state_init(void)
3130 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
3131 INIT_LIST_HEAD(&conf_id_hashtbl[i]);
3132 INIT_LIST_HEAD(&conf_str_hashtbl[i]);
3133 INIT_LIST_HEAD(&unconf_str_hashtbl[i]);
3134 INIT_LIST_HEAD(&unconf_id_hashtbl[i]);
3136 for (i = 0; i < FILE_HASH_SIZE; i++) {
3137 INIT_LIST_HEAD(&file_hashtbl[i]);
3139 for (i = 0; i < OWNER_HASH_SIZE; i++) {
3140 INIT_LIST_HEAD(&ownerstr_hashtbl[i]);
3141 INIT_LIST_HEAD(&ownerid_hashtbl[i]);
3143 for (i = 0; i < STATEID_HASH_SIZE; i++) {
3144 INIT_LIST_HEAD(&stateid_hashtbl[i]);
3145 INIT_LIST_HEAD(&lockstateid_hashtbl[i]);
3147 for (i = 0; i < LOCK_HASH_SIZE; i++) {
3148 INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]);
3149 INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]);
3151 memset(&onestateid, ~0, sizeof(stateid_t));
3152 INIT_LIST_HEAD(&close_lru);
3153 INIT_LIST_HEAD(&client_lru);
3154 INIT_LIST_HEAD(&del_recall_lru);
3155 for (i = 0; i < CLIENT_HASH_SIZE; i++)
3156 INIT_LIST_HEAD(&reclaim_str_hashtbl[i]);
3157 reclaim_str_hashtbl_size = 0;
3161 nfsd4_load_reboot_recovery_data(void)
3166 nfsd4_init_recdir(user_recovery_dirname);
3167 status = nfsd4_recdir_load();
3168 nfs4_unlock_state();
3170 printk("NFSD: Failure reading reboot recovery data\n");
3173 /* initialization to perform when the nfsd service is started: */
3176 __nfs4_state_start(void)
3180 boot_time = get_seconds();
3181 grace_time = max(user_lease_time, lease_time);
3182 lease_time = user_lease_time;
3184 printk("NFSD: starting %ld-second grace period\n", grace_time);
3185 laundry_wq = create_singlethread_workqueue("nfsd4");
3186 queue_delayed_work(laundry_wq, &laundromat_work, grace_time*HZ);
3190 nfs4_state_start(void)
3196 status = nfsd4_init_slabs();
3199 nfsd4_load_reboot_recovery_data();
3200 __nfs4_state_start();
3212 nfs4_lease_time(void)
3218 __nfs4_state_shutdown(void)
3221 struct nfs4_client *clp = NULL;
3222 struct nfs4_delegation *dp = NULL;
3223 struct list_head *pos, *next, reaplist;
3225 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
3226 while (!list_empty(&conf_id_hashtbl[i])) {
3227 clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
3230 while (!list_empty(&unconf_str_hashtbl[i])) {
3231 clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash);
3235 INIT_LIST_HEAD(&reaplist);
3236 spin_lock(&recall_lock);
3237 list_for_each_safe(pos, next, &del_recall_lru) {
3238 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
3239 list_move(&dp->dl_recall_lru, &reaplist);
3241 spin_unlock(&recall_lock);
3242 list_for_each_safe(pos, next, &reaplist) {
3243 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
3244 list_del_init(&dp->dl_recall_lru);
3245 unhash_delegation(dp);
3248 cancel_delayed_work(&laundromat_work);
3249 nfsd4_shutdown_recdir();
3254 nfs4_state_shutdown(void)
3256 cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work);
3257 destroy_workqueue(laundry_wq);
3259 nfs4_release_reclaim();
3260 __nfs4_state_shutdown();
3262 nfs4_unlock_state();
3266 nfs4_set_recdir(char *recdir)
3269 strcpy(user_recovery_dirname, recdir);
3270 nfs4_unlock_state();
3274 * Change the NFSv4 recovery directory to recdir.
3277 nfs4_reset_recoverydir(char *recdir)
3280 struct nameidata nd;
3282 status = path_lookup(recdir, LOOKUP_FOLLOW, &nd);
3286 if (S_ISDIR(nd.dentry->d_inode->i_mode)) {
3287 nfs4_set_recdir(recdir);
3295 * Called when leasetime is changed.
3297 * The only way the protocol gives us to handle on-the-fly lease changes is to
3298 * simulate a reboot. Instead of doing that, we just wait till the next time
3299 * we start to register any changes in lease time. If the administrator
3300 * really wants to change the lease time *now*, they can go ahead and bring
3301 * nfsd down and then back up again after changing the lease time.
3304 nfs4_reset_lease(time_t leasetime)
3307 user_lease_time = leasetime;