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/swap.h>
53 #include <linux/mutex.h>
54 #include <linux/lockd/bind.h>
55 #include <linux/module.h>
57 #define NFSDDBG_FACILITY NFSDDBG_PROC
60 static time_t lease_time = 90; /* default lease time */
61 static time_t user_lease_time = 90;
62 static time_t boot_time;
63 static int in_grace = 1;
64 static u32 current_clientid = 1;
65 static u32 current_ownerid = 1;
66 static u32 current_fileid = 1;
67 static u32 current_delegid = 1;
69 static stateid_t zerostateid; /* bits all 0 */
70 static stateid_t onestateid; /* bits all 1 */
72 #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t)))
73 #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t)))
75 /* forward declarations */
76 static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags);
77 static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid);
78 static void release_stateid_lockowners(struct nfs4_stateid *open_stp);
79 static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery";
80 static void nfs4_set_recdir(char *recdir);
85 * protects clientid_hashtbl[], clientstr_hashtbl[],
86 * unconfstr_hashtbl[], uncofid_hashtbl[].
88 static DEFINE_MUTEX(client_mutex);
90 static struct kmem_cache *stateowner_slab = NULL;
91 static struct kmem_cache *file_slab = NULL;
92 static struct kmem_cache *stateid_slab = NULL;
93 static struct kmem_cache *deleg_slab = NULL;
98 mutex_lock(&client_mutex);
102 nfs4_unlock_state(void)
104 mutex_unlock(&client_mutex);
108 opaque_hashval(const void *ptr, int nbytes)
110 unsigned char *cptr = (unsigned char *) ptr;
120 /* forward declarations */
121 static void release_stateowner(struct nfs4_stateowner *sop);
122 static void release_stateid(struct nfs4_stateid *stp, int flags);
128 /* recall_lock protects the del_recall_lru */
129 static DEFINE_SPINLOCK(recall_lock);
130 static struct list_head del_recall_lru;
133 free_nfs4_file(struct kref *kref)
135 struct nfs4_file *fp = container_of(kref, struct nfs4_file, fi_ref);
136 list_del(&fp->fi_hash);
138 kmem_cache_free(file_slab, fp);
142 put_nfs4_file(struct nfs4_file *fi)
144 kref_put(&fi->fi_ref, free_nfs4_file);
148 get_nfs4_file(struct nfs4_file *fi)
150 kref_get(&fi->fi_ref);
153 static int num_delegations;
154 unsigned int max_delegations;
157 * Open owner state (share locks)
160 /* hash tables for nfs4_stateowner */
161 #define OWNER_HASH_BITS 8
162 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
163 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
165 #define ownerid_hashval(id) \
166 ((id) & OWNER_HASH_MASK)
167 #define ownerstr_hashval(clientid, ownername) \
168 (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK)
170 static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE];
171 static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE];
173 /* hash table for nfs4_file */
174 #define FILE_HASH_BITS 8
175 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
176 #define FILE_HASH_MASK (FILE_HASH_SIZE - 1)
177 /* hash table for (open)nfs4_stateid */
178 #define STATEID_HASH_BITS 10
179 #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS)
180 #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1)
182 #define file_hashval(x) \
183 hash_ptr(x, FILE_HASH_BITS)
184 #define stateid_hashval(owner_id, file_id) \
185 (((owner_id) + (file_id)) & STATEID_HASH_MASK)
187 static struct list_head file_hashtbl[FILE_HASH_SIZE];
188 static struct list_head stateid_hashtbl[STATEID_HASH_SIZE];
190 static struct nfs4_delegation *
191 alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type)
193 struct nfs4_delegation *dp;
194 struct nfs4_file *fp = stp->st_file;
195 struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback;
197 dprintk("NFSD alloc_init_deleg\n");
198 if (fp->fi_had_conflict)
200 if (num_delegations > max_delegations)
202 dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL);
206 INIT_LIST_HEAD(&dp->dl_perfile);
207 INIT_LIST_HEAD(&dp->dl_perclnt);
208 INIT_LIST_HEAD(&dp->dl_recall_lru);
213 get_file(stp->st_vfs_file);
214 dp->dl_vfs_file = stp->st_vfs_file;
216 dp->dl_recall.cbr_dp = NULL;
217 dp->dl_recall.cbr_ident = cb->cb_ident;
218 dp->dl_recall.cbr_trunc = 0;
219 dp->dl_stateid.si_boot = boot_time;
220 dp->dl_stateid.si_stateownerid = current_delegid++;
221 dp->dl_stateid.si_fileid = 0;
222 dp->dl_stateid.si_generation = 0;
223 dp->dl_fhlen = current_fh->fh_handle.fh_size;
224 memcpy(dp->dl_fhval, ¤t_fh->fh_handle.fh_base,
225 current_fh->fh_handle.fh_size);
227 atomic_set(&dp->dl_count, 1);
228 list_add(&dp->dl_perfile, &fp->fi_delegations);
229 list_add(&dp->dl_perclnt, &clp->cl_delegations);
234 nfs4_put_delegation(struct nfs4_delegation *dp)
236 if (atomic_dec_and_test(&dp->dl_count)) {
237 dprintk("NFSD: freeing dp %p\n",dp);
238 put_nfs4_file(dp->dl_file);
239 kmem_cache_free(deleg_slab, dp);
244 /* Remove the associated file_lock first, then remove the delegation.
245 * lease_modify() is called to remove the FS_LEASE file_lock from
246 * the i_flock list, eventually calling nfsd's lock_manager
247 * fl_release_callback.
250 nfs4_close_delegation(struct nfs4_delegation *dp)
252 struct file *filp = dp->dl_vfs_file;
254 dprintk("NFSD: close_delegation dp %p\n",dp);
255 dp->dl_vfs_file = NULL;
256 /* The following nfsd_close may not actually close the file,
257 * but we want to remove the lease in any case. */
259 vfs_setlease(filp, F_UNLCK, &dp->dl_flock);
263 /* Called under the state lock. */
265 unhash_delegation(struct nfs4_delegation *dp)
267 list_del_init(&dp->dl_perfile);
268 list_del_init(&dp->dl_perclnt);
269 spin_lock(&recall_lock);
270 list_del_init(&dp->dl_recall_lru);
271 spin_unlock(&recall_lock);
272 nfs4_close_delegation(dp);
273 nfs4_put_delegation(dp);
280 /* Hash tables for nfs4_clientid state */
281 #define CLIENT_HASH_BITS 4
282 #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
283 #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
285 #define clientid_hashval(id) \
286 ((id) & CLIENT_HASH_MASK)
287 #define clientstr_hashval(name) \
288 (opaque_hashval((name), 8) & CLIENT_HASH_MASK)
290 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
291 * used in reboot/reset lease grace period processing
293 * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed
294 * setclientid_confirmed info.
296 * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed
299 * client_lru holds client queue ordered by nfs4_client.cl_time
302 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
303 * for last close replay.
305 static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE];
306 static int reclaim_str_hashtbl_size = 0;
307 static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE];
308 static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE];
309 static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE];
310 static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE];
311 static struct list_head client_lru;
312 static struct list_head close_lru;
315 renew_client(struct nfs4_client *clp)
318 * Move client to the end to the LRU list.
320 dprintk("renewing client (clientid %08x/%08x)\n",
321 clp->cl_clientid.cl_boot,
322 clp->cl_clientid.cl_id);
323 list_move_tail(&clp->cl_lru, &client_lru);
324 clp->cl_time = get_seconds();
327 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
329 STALE_CLIENTID(clientid_t *clid)
331 if (clid->cl_boot == boot_time)
333 dprintk("NFSD stale clientid (%08x/%08x)\n",
334 clid->cl_boot, clid->cl_id);
339 * XXX Should we use a slab cache ?
340 * This type of memory management is somewhat inefficient, but we use it
341 * anyway since SETCLIENTID is not a common operation.
343 static inline struct nfs4_client *
344 alloc_client(struct xdr_netobj name)
346 struct nfs4_client *clp;
348 if ((clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL))!= NULL) {
349 if ((clp->cl_name.data = kmalloc(name.len, GFP_KERNEL)) != NULL) {
350 memcpy(clp->cl_name.data, name.data, name.len);
351 clp->cl_name.len = name.len;
362 shutdown_callback_client(struct nfs4_client *clp)
364 struct rpc_clnt *clnt = clp->cl_callback.cb_client;
366 /* shutdown rpc client, ending any outstanding recall rpcs */
368 clp->cl_callback.cb_client = NULL;
369 rpc_shutdown_client(clnt);
374 free_client(struct nfs4_client *clp)
376 shutdown_callback_client(clp);
377 if (clp->cl_cred.cr_group_info)
378 put_group_info(clp->cl_cred.cr_group_info);
379 kfree(clp->cl_name.data);
384 put_nfs4_client(struct nfs4_client *clp)
386 if (atomic_dec_and_test(&clp->cl_count))
391 expire_client(struct nfs4_client *clp)
393 struct nfs4_stateowner *sop;
394 struct nfs4_delegation *dp;
395 struct list_head reaplist;
397 dprintk("NFSD: expire_client cl_count %d\n",
398 atomic_read(&clp->cl_count));
400 INIT_LIST_HEAD(&reaplist);
401 spin_lock(&recall_lock);
402 while (!list_empty(&clp->cl_delegations)) {
403 dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt);
404 dprintk("NFSD: expire client. dp %p, fp %p\n", dp,
406 list_del_init(&dp->dl_perclnt);
407 list_move(&dp->dl_recall_lru, &reaplist);
409 spin_unlock(&recall_lock);
410 while (!list_empty(&reaplist)) {
411 dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru);
412 list_del_init(&dp->dl_recall_lru);
413 unhash_delegation(dp);
415 list_del(&clp->cl_idhash);
416 list_del(&clp->cl_strhash);
417 list_del(&clp->cl_lru);
418 while (!list_empty(&clp->cl_openowners)) {
419 sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient);
420 release_stateowner(sop);
422 put_nfs4_client(clp);
425 static struct nfs4_client *
426 create_client(struct xdr_netobj name, char *recdir) {
427 struct nfs4_client *clp;
429 if (!(clp = alloc_client(name)))
431 memcpy(clp->cl_recdir, recdir, HEXDIR_LEN);
432 atomic_set(&clp->cl_count, 1);
433 atomic_set(&clp->cl_callback.cb_set, 0);
434 INIT_LIST_HEAD(&clp->cl_idhash);
435 INIT_LIST_HEAD(&clp->cl_strhash);
436 INIT_LIST_HEAD(&clp->cl_openowners);
437 INIT_LIST_HEAD(&clp->cl_delegations);
438 INIT_LIST_HEAD(&clp->cl_lru);
444 copy_verf(struct nfs4_client *target, nfs4_verifier *source) {
445 memcpy(target->cl_verifier.data, source->data, sizeof(target->cl_verifier.data));
449 copy_clid(struct nfs4_client *target, struct nfs4_client *source) {
450 target->cl_clientid.cl_boot = source->cl_clientid.cl_boot;
451 target->cl_clientid.cl_id = source->cl_clientid.cl_id;
455 copy_cred(struct svc_cred *target, struct svc_cred *source) {
457 target->cr_uid = source->cr_uid;
458 target->cr_gid = source->cr_gid;
459 target->cr_group_info = source->cr_group_info;
460 get_group_info(target->cr_group_info);
464 same_name(const char *n1, const char *n2)
466 return 0 == memcmp(n1, n2, HEXDIR_LEN);
470 same_verf(nfs4_verifier *v1, nfs4_verifier *v2)
472 return 0 == memcmp(v1->data, v2->data, sizeof(v1->data));
476 same_clid(clientid_t *cl1, clientid_t *cl2)
478 return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id);
481 /* XXX what about NGROUP */
483 same_creds(struct svc_cred *cr1, struct svc_cred *cr2)
485 return cr1->cr_uid == cr2->cr_uid;
489 gen_clid(struct nfs4_client *clp) {
490 clp->cl_clientid.cl_boot = boot_time;
491 clp->cl_clientid.cl_id = current_clientid++;
495 gen_confirm(struct nfs4_client *clp) {
500 p = (u32 *)clp->cl_confirm.data;
506 check_name(struct xdr_netobj name) {
510 if (name.len > NFS4_OPAQUE_LIMIT) {
511 dprintk("NFSD: check_name: name too long(%d)!\n", name.len);
518 add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval)
520 unsigned int idhashval;
522 list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]);
523 idhashval = clientid_hashval(clp->cl_clientid.cl_id);
524 list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]);
525 list_add_tail(&clp->cl_lru, &client_lru);
526 clp->cl_time = get_seconds();
530 move_to_confirmed(struct nfs4_client *clp)
532 unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id);
533 unsigned int strhashval;
535 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp);
536 list_del_init(&clp->cl_strhash);
537 list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]);
538 strhashval = clientstr_hashval(clp->cl_recdir);
539 list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]);
543 static struct nfs4_client *
544 find_confirmed_client(clientid_t *clid)
546 struct nfs4_client *clp;
547 unsigned int idhashval = clientid_hashval(clid->cl_id);
549 list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) {
550 if (same_clid(&clp->cl_clientid, clid))
556 static struct nfs4_client *
557 find_unconfirmed_client(clientid_t *clid)
559 struct nfs4_client *clp;
560 unsigned int idhashval = clientid_hashval(clid->cl_id);
562 list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) {
563 if (same_clid(&clp->cl_clientid, clid))
569 static struct nfs4_client *
570 find_confirmed_client_by_str(const char *dname, unsigned int hashval)
572 struct nfs4_client *clp;
574 list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) {
575 if (same_name(clp->cl_recdir, dname))
581 static struct nfs4_client *
582 find_unconfirmed_client_by_str(const char *dname, unsigned int hashval)
584 struct nfs4_client *clp;
586 list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) {
587 if (same_name(clp->cl_recdir, dname))
593 /* a helper function for parse_callback */
595 parse_octet(unsigned int *lenp, char **addrp)
597 unsigned int len = *lenp;
609 if ((c < '0') || (c > '9')) {
615 n = (n * 10) + (c - '0');
626 /* parse and set the setclientid ipv4 callback address */
628 parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp)
633 u32 addrlen = addr_len;
634 char *addr = addr_val;
639 for(i = 4; i > 0 ; i--) {
640 if ((temp = parse_octet(&addrlen, &addr)) < 0) {
643 cbaddr |= (temp << shift);
651 for(i = 2; i > 0 ; i--) {
652 if ((temp = parse_octet(&addrlen, &addr)) < 0) {
655 cbport |= (temp << shift);
664 gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se)
666 struct nfs4_callback *cb = &clp->cl_callback;
668 /* Currently, we only support tcp for the callback channel */
669 if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3))
672 if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val,
673 &cb->cb_addr, &cb->cb_port)))
675 cb->cb_prog = se->se_callback_prog;
676 cb->cb_ident = se->se_callback_ident;
679 dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) "
680 "will not receive delegations\n",
681 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
687 * RFC 3010 has a complex implmentation description of processing a
688 * SETCLIENTID request consisting of 5 bullets, labeled as
689 * CASE0 - CASE4 below.
692 * callback information will be processed in a future patch
694 * an unconfirmed record is added when:
695 * NORMAL (part of CASE 4): there is no confirmed nor unconfirmed record.
696 * CASE 1: confirmed record found with matching name, principal,
697 * verifier, and clientid.
698 * CASE 2: confirmed record found with matching name, principal,
699 * and there is no unconfirmed record with matching
702 * an unconfirmed record is replaced when:
703 * CASE 3: confirmed record found with matching name, principal,
704 * and an unconfirmed record is found with matching
705 * name, principal, and with clientid and
706 * confirm that does not match the confirmed record.
707 * CASE 4: there is no confirmed record with matching name and
708 * principal. there is an unconfirmed record with
709 * matching name, principal.
711 * an unconfirmed record is deleted when:
712 * CASE 1: an unconfirmed record that matches input name, verifier,
713 * and confirmed clientid.
714 * CASE 4: any unconfirmed records with matching name and principal
715 * that exist after an unconfirmed record has been replaced
716 * as described above.
720 nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
721 struct nfsd4_setclientid *setclid)
723 struct sockaddr_in *sin = svc_addr_in(rqstp);
724 struct xdr_netobj clname = {
725 .len = setclid->se_namelen,
726 .data = setclid->se_name,
728 nfs4_verifier clverifier = setclid->se_verf;
729 unsigned int strhashval;
730 struct nfs4_client *conf, *unconf, *new;
732 char dname[HEXDIR_LEN];
734 if (!check_name(clname))
737 status = nfs4_make_rec_clidname(dname, &clname);
742 * XXX The Duplicate Request Cache (DRC) has been checked (??)
743 * We get here on a DRC miss.
746 strhashval = clientstr_hashval(dname);
749 conf = find_confirmed_client_by_str(dname, strhashval);
753 * clname match, confirmed, different principal
754 * or different ip_address
756 status = nfserr_clid_inuse;
757 if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)
758 || conf->cl_addr != sin->sin_addr.s_addr) {
759 dprintk("NFSD: setclientid: string in use by client"
760 "at %u.%u.%u.%u\n", NIPQUAD(conf->cl_addr));
764 unconf = find_unconfirmed_client_by_str(dname, strhashval);
765 status = nfserr_resource;
769 * placed first, because it is the normal case.
772 expire_client(unconf);
773 new = create_client(clname, dname);
777 } else if (same_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_clid(new, conf);
803 } else if (!unconf) {
806 * clname match, confirmed, principal match
807 * verfier does not match
808 * no unconfirmed. create a new unconfirmed nfs4_client
809 * using input clverifier, clname, and callback info
810 * and generate a new cl_clientid and cl_confirm.
812 new = create_client(clname, dname);
816 } else if (!same_verf(&conf->cl_confirm, &unconf->cl_confirm)) {
819 * confirmed found (name, principal match)
820 * confirmed verifier does not match input clverifier
822 * unconfirmed found (name match)
823 * confirmed->cl_confirm != unconfirmed->cl_confirm
825 * remove unconfirmed.
827 * create an unconfirmed nfs4_client
828 * with same cl_name as existing confirmed nfs4_client,
829 * but with new callback info, new cl_clientid,
830 * new cl_verifier and a new cl_confirm
832 expire_client(unconf);
833 new = create_client(clname, dname);
838 /* No cases hit !!! */
839 status = nfserr_inval;
843 copy_verf(new, &clverifier);
844 new->cl_addr = sin->sin_addr.s_addr;
845 copy_cred(&new->cl_cred, &rqstp->rq_cred);
847 gen_callback(new, setclid);
848 add_to_unconfirmed(new, strhashval);
849 setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot;
850 setclid->se_clientid.cl_id = new->cl_clientid.cl_id;
851 memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data));
860 * RFC 3010 has a complex implmentation description of processing a
861 * SETCLIENTID_CONFIRM request consisting of 4 bullets describing
862 * processing on a DRC miss, labeled as CASE1 - CASE4 below.
864 * NOTE: callback information will be processed here in a future patch
867 nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
868 struct nfsd4_compound_state *cstate,
869 struct nfsd4_setclientid_confirm *setclientid_confirm)
871 struct sockaddr_in *sin = svc_addr_in(rqstp);
872 struct nfs4_client *conf, *unconf;
873 nfs4_verifier confirm = setclientid_confirm->sc_confirm;
874 clientid_t * clid = &setclientid_confirm->sc_clientid;
877 if (STALE_CLIENTID(clid))
878 return nfserr_stale_clientid;
880 * XXX The Duplicate Request Cache (DRC) has been checked (??)
881 * We get here on a DRC miss.
886 conf = find_confirmed_client(clid);
887 unconf = find_unconfirmed_client(clid);
889 status = nfserr_clid_inuse;
890 if (conf && conf->cl_addr != sin->sin_addr.s_addr)
892 if (unconf && unconf->cl_addr != sin->sin_addr.s_addr)
895 if ((conf && unconf) &&
896 (same_verf(&unconf->cl_confirm, &confirm)) &&
897 (same_verf(&conf->cl_verifier, &unconf->cl_verifier)) &&
898 (same_name(conf->cl_recdir,unconf->cl_recdir)) &&
899 (!same_verf(&conf->cl_confirm, &unconf->cl_confirm))) {
901 * unconf record that matches input clientid and input confirm.
902 * conf record that matches input clientid.
903 * conf and unconf records match names, verifiers
905 if (!same_creds(&conf->cl_cred, &unconf->cl_cred))
906 status = nfserr_clid_inuse;
908 /* XXX: We just turn off callbacks until we can handle
909 * change request correctly. */
910 atomic_set(&conf->cl_callback.cb_set, 0);
912 nfsd4_remove_clid_dir(unconf);
913 expire_client(unconf);
917 } else if ((conf && !unconf) ||
919 (!same_verf(&conf->cl_verifier, &unconf->cl_verifier) ||
920 !same_name(conf->cl_recdir, unconf->cl_recdir)))) {
922 * conf record that matches input clientid.
923 * if unconf record matches input clientid, then
924 * unconf->cl_name or unconf->cl_verifier don't match the
927 if (!same_creds(&conf->cl_cred, &rqstp->rq_cred))
928 status = nfserr_clid_inuse;
931 } else if (!conf && unconf
932 && same_verf(&unconf->cl_confirm, &confirm)) {
934 * conf record not found.
935 * unconf record found.
936 * unconf->cl_confirm matches input confirm
938 if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) {
939 status = nfserr_clid_inuse;
942 clientstr_hashval(unconf->cl_recdir);
943 conf = find_confirmed_client_by_str(unconf->cl_recdir,
946 nfsd4_remove_clid_dir(conf);
949 move_to_confirmed(unconf);
951 nfsd4_probe_callback(conf);
954 } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm)))
955 && (!unconf || (unconf && !same_verf(&unconf->cl_confirm,
958 * conf record not found, or if conf, conf->cl_confirm does not
959 * match input confirm.
960 * unconf record not found, or if unconf, unconf->cl_confirm
961 * does not match input confirm.
963 status = nfserr_stale_clientid;
965 /* check that we have hit one of the cases...*/
966 status = nfserr_clid_inuse;
973 /* OPEN Share state helper functions */
974 static inline struct nfs4_file *
975 alloc_init_file(struct inode *ino)
977 struct nfs4_file *fp;
978 unsigned int hashval = file_hashval(ino);
980 fp = kmem_cache_alloc(file_slab, GFP_KERNEL);
982 kref_init(&fp->fi_ref);
983 INIT_LIST_HEAD(&fp->fi_hash);
984 INIT_LIST_HEAD(&fp->fi_stateids);
985 INIT_LIST_HEAD(&fp->fi_delegations);
986 list_add(&fp->fi_hash, &file_hashtbl[hashval]);
987 fp->fi_inode = igrab(ino);
988 fp->fi_id = current_fileid++;
989 fp->fi_had_conflict = false;
996 nfsd4_free_slab(struct kmem_cache **slab)
1000 kmem_cache_destroy(*slab);
1005 nfsd4_free_slabs(void)
1007 nfsd4_free_slab(&stateowner_slab);
1008 nfsd4_free_slab(&file_slab);
1009 nfsd4_free_slab(&stateid_slab);
1010 nfsd4_free_slab(&deleg_slab);
1014 nfsd4_init_slabs(void)
1016 stateowner_slab = kmem_cache_create("nfsd4_stateowners",
1017 sizeof(struct nfs4_stateowner), 0, 0, NULL);
1018 if (stateowner_slab == NULL)
1020 file_slab = kmem_cache_create("nfsd4_files",
1021 sizeof(struct nfs4_file), 0, 0, NULL);
1022 if (file_slab == NULL)
1024 stateid_slab = kmem_cache_create("nfsd4_stateids",
1025 sizeof(struct nfs4_stateid), 0, 0, NULL);
1026 if (stateid_slab == NULL)
1028 deleg_slab = kmem_cache_create("nfsd4_delegations",
1029 sizeof(struct nfs4_delegation), 0, 0, NULL);
1030 if (deleg_slab == NULL)
1035 dprintk("nfsd4: out of memory while initializing nfsv4\n");
1040 nfs4_free_stateowner(struct kref *kref)
1042 struct nfs4_stateowner *sop =
1043 container_of(kref, struct nfs4_stateowner, so_ref);
1044 kfree(sop->so_owner.data);
1045 kmem_cache_free(stateowner_slab, sop);
1048 static inline struct nfs4_stateowner *
1049 alloc_stateowner(struct xdr_netobj *owner)
1051 struct nfs4_stateowner *sop;
1053 if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) {
1054 if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) {
1055 memcpy(sop->so_owner.data, owner->data, owner->len);
1056 sop->so_owner.len = owner->len;
1057 kref_init(&sop->so_ref);
1060 kmem_cache_free(stateowner_slab, sop);
1065 static struct nfs4_stateowner *
1066 alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) {
1067 struct nfs4_stateowner *sop;
1068 struct nfs4_replay *rp;
1069 unsigned int idhashval;
1071 if (!(sop = alloc_stateowner(&open->op_owner)))
1073 idhashval = ownerid_hashval(current_ownerid);
1074 INIT_LIST_HEAD(&sop->so_idhash);
1075 INIT_LIST_HEAD(&sop->so_strhash);
1076 INIT_LIST_HEAD(&sop->so_perclient);
1077 INIT_LIST_HEAD(&sop->so_stateids);
1078 INIT_LIST_HEAD(&sop->so_perstateid); /* not used */
1079 INIT_LIST_HEAD(&sop->so_close_lru);
1081 list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]);
1082 list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]);
1083 list_add(&sop->so_perclient, &clp->cl_openowners);
1084 sop->so_is_open_owner = 1;
1085 sop->so_id = current_ownerid++;
1086 sop->so_client = clp;
1087 sop->so_seqid = open->op_seqid;
1088 sop->so_confirmed = 0;
1089 rp = &sop->so_replay;
1090 rp->rp_status = nfserr_serverfault;
1092 rp->rp_buf = rp->rp_ibuf;
1097 release_stateid_lockowners(struct nfs4_stateid *open_stp)
1099 struct nfs4_stateowner *lock_sop;
1101 while (!list_empty(&open_stp->st_lockowners)) {
1102 lock_sop = list_entry(open_stp->st_lockowners.next,
1103 struct nfs4_stateowner, so_perstateid);
1104 /* list_del(&open_stp->st_lockowners); */
1105 BUG_ON(lock_sop->so_is_open_owner);
1106 release_stateowner(lock_sop);
1111 unhash_stateowner(struct nfs4_stateowner *sop)
1113 struct nfs4_stateid *stp;
1115 list_del(&sop->so_idhash);
1116 list_del(&sop->so_strhash);
1117 if (sop->so_is_open_owner)
1118 list_del(&sop->so_perclient);
1119 list_del(&sop->so_perstateid);
1120 while (!list_empty(&sop->so_stateids)) {
1121 stp = list_entry(sop->so_stateids.next,
1122 struct nfs4_stateid, st_perstateowner);
1123 if (sop->so_is_open_owner)
1124 release_stateid(stp, OPEN_STATE);
1126 release_stateid(stp, LOCK_STATE);
1131 release_stateowner(struct nfs4_stateowner *sop)
1133 unhash_stateowner(sop);
1134 list_del(&sop->so_close_lru);
1135 nfs4_put_stateowner(sop);
1139 init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) {
1140 struct nfs4_stateowner *sop = open->op_stateowner;
1141 unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id);
1143 INIT_LIST_HEAD(&stp->st_hash);
1144 INIT_LIST_HEAD(&stp->st_perstateowner);
1145 INIT_LIST_HEAD(&stp->st_lockowners);
1146 INIT_LIST_HEAD(&stp->st_perfile);
1147 list_add(&stp->st_hash, &stateid_hashtbl[hashval]);
1148 list_add(&stp->st_perstateowner, &sop->so_stateids);
1149 list_add(&stp->st_perfile, &fp->fi_stateids);
1150 stp->st_stateowner = sop;
1153 stp->st_stateid.si_boot = boot_time;
1154 stp->st_stateid.si_stateownerid = sop->so_id;
1155 stp->st_stateid.si_fileid = fp->fi_id;
1156 stp->st_stateid.si_generation = 0;
1157 stp->st_access_bmap = 0;
1158 stp->st_deny_bmap = 0;
1159 __set_bit(open->op_share_access, &stp->st_access_bmap);
1160 __set_bit(open->op_share_deny, &stp->st_deny_bmap);
1161 stp->st_openstp = NULL;
1165 release_stateid(struct nfs4_stateid *stp, int flags)
1167 struct file *filp = stp->st_vfs_file;
1169 list_del(&stp->st_hash);
1170 list_del(&stp->st_perfile);
1171 list_del(&stp->st_perstateowner);
1172 if (flags & OPEN_STATE) {
1173 release_stateid_lockowners(stp);
1174 stp->st_vfs_file = NULL;
1176 } else if (flags & LOCK_STATE)
1177 locks_remove_posix(filp, (fl_owner_t) stp->st_stateowner);
1178 put_nfs4_file(stp->st_file);
1179 kmem_cache_free(stateid_slab, stp);
1183 move_to_close_lru(struct nfs4_stateowner *sop)
1185 dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop);
1187 list_move_tail(&sop->so_close_lru, &close_lru);
1188 sop->so_time = get_seconds();
1192 same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner,
1195 return (sop->so_owner.len == owner->len) &&
1196 0 == memcmp(sop->so_owner.data, owner->data, owner->len) &&
1197 (sop->so_client->cl_clientid.cl_id == clid->cl_id);
1200 static struct nfs4_stateowner *
1201 find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open)
1203 struct nfs4_stateowner *so = NULL;
1205 list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) {
1206 if (same_owner_str(so, &open->op_owner, &open->op_clientid))
1212 /* search file_hashtbl[] for file */
1213 static struct nfs4_file *
1214 find_file(struct inode *ino)
1216 unsigned int hashval = file_hashval(ino);
1217 struct nfs4_file *fp;
1219 list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) {
1220 if (fp->fi_inode == ino) {
1228 static int access_valid(u32 x)
1230 return (x > 0 && x < 4);
1233 static int deny_valid(u32 x)
1235 return (x >= 0 && x < 5);
1239 set_access(unsigned int *access, unsigned long bmap) {
1243 for (i = 1; i < 4; i++) {
1244 if (test_bit(i, &bmap))
1250 set_deny(unsigned int *deny, unsigned long bmap) {
1254 for (i = 0; i < 4; i++) {
1255 if (test_bit(i, &bmap))
1261 test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) {
1262 unsigned int access, deny;
1264 set_access(&access, stp->st_access_bmap);
1265 set_deny(&deny, stp->st_deny_bmap);
1266 if ((access & open->op_share_deny) || (deny & open->op_share_access))
1272 * Called to check deny when READ with all zero stateid or
1273 * WRITE with all zero or all one stateid
1276 nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type)
1278 struct inode *ino = current_fh->fh_dentry->d_inode;
1279 struct nfs4_file *fp;
1280 struct nfs4_stateid *stp;
1283 dprintk("NFSD: nfs4_share_conflict\n");
1285 fp = find_file(ino);
1288 ret = nfserr_locked;
1289 /* Search for conflicting share reservations */
1290 list_for_each_entry(stp, &fp->fi_stateids, st_perfile) {
1291 if (test_bit(deny_type, &stp->st_deny_bmap) ||
1292 test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap))
1302 nfs4_file_downgrade(struct file *filp, unsigned int share_access)
1304 if (share_access & NFS4_SHARE_ACCESS_WRITE) {
1305 put_write_access(filp->f_path.dentry->d_inode);
1306 filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE;
1311 * Recall a delegation
1314 do_recall(void *__dp)
1316 struct nfs4_delegation *dp = __dp;
1318 dp->dl_file->fi_had_conflict = true;
1319 nfsd4_cb_recall(dp);
1324 * Spawn a thread to perform a recall on the delegation represented
1325 * by the lease (file_lock)
1327 * Called from break_lease() with lock_kernel() held.
1328 * Note: we assume break_lease will only call this *once* for any given
1332 void nfsd_break_deleg_cb(struct file_lock *fl)
1334 struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner;
1335 struct task_struct *t;
1337 dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl);
1341 /* We're assuming the state code never drops its reference
1342 * without first removing the lease. Since we're in this lease
1343 * callback (and since the lease code is serialized by the kernel
1344 * lock) we know the server hasn't removed the lease yet, we know
1345 * it's safe to take a reference: */
1346 atomic_inc(&dp->dl_count);
1347 atomic_inc(&dp->dl_client->cl_count);
1349 spin_lock(&recall_lock);
1350 list_add_tail(&dp->dl_recall_lru, &del_recall_lru);
1351 spin_unlock(&recall_lock);
1353 /* only place dl_time is set. protected by lock_kernel*/
1354 dp->dl_time = get_seconds();
1357 * We don't want the locks code to timeout the lease for us;
1358 * we'll remove it ourself if the delegation isn't returned
1361 fl->fl_break_time = 0;
1363 t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall");
1365 struct nfs4_client *clp = dp->dl_client;
1367 printk(KERN_INFO "NFSD: Callback thread failed for "
1368 "for client (clientid %08x/%08x)\n",
1369 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
1370 put_nfs4_client(dp->dl_client);
1371 nfs4_put_delegation(dp);
1376 * The file_lock is being reapd.
1378 * Called by locks_free_lock() with lock_kernel() held.
1381 void nfsd_release_deleg_cb(struct file_lock *fl)
1383 struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner;
1385 dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count));
1387 if (!(fl->fl_flags & FL_LEASE) || !dp)
1389 dp->dl_flock = NULL;
1393 * Set the delegation file_lock back pointer.
1395 * Called from setlease() with lock_kernel() held.
1398 void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl)
1400 struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner;
1402 dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp);
1409 * Called from setlease() with lock_kernel() held
1412 int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try)
1414 struct nfs4_delegation *onlistd =
1415 (struct nfs4_delegation *)onlist->fl_owner;
1416 struct nfs4_delegation *tryd =
1417 (struct nfs4_delegation *)try->fl_owner;
1419 if (onlist->fl_lmops != try->fl_lmops)
1422 return onlistd->dl_client == tryd->dl_client;
1427 int nfsd_change_deleg_cb(struct file_lock **onlist, int arg)
1430 return lease_modify(onlist, arg);
1435 static struct lock_manager_operations nfsd_lease_mng_ops = {
1436 .fl_break = nfsd_break_deleg_cb,
1437 .fl_release_private = nfsd_release_deleg_cb,
1438 .fl_copy_lock = nfsd_copy_lock_deleg_cb,
1439 .fl_mylease = nfsd_same_client_deleg_cb,
1440 .fl_change = nfsd_change_deleg_cb,
1445 nfsd4_process_open1(struct nfsd4_open *open)
1447 clientid_t *clientid = &open->op_clientid;
1448 struct nfs4_client *clp = NULL;
1449 unsigned int strhashval;
1450 struct nfs4_stateowner *sop = NULL;
1452 if (!check_name(open->op_owner))
1453 return nfserr_inval;
1455 if (STALE_CLIENTID(&open->op_clientid))
1456 return nfserr_stale_clientid;
1458 strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner);
1459 sop = find_openstateowner_str(strhashval, open);
1460 open->op_stateowner = sop;
1462 /* Make sure the client's lease hasn't expired. */
1463 clp = find_confirmed_client(clientid);
1465 return nfserr_expired;
1468 if (!sop->so_confirmed) {
1469 /* Replace unconfirmed owners without checking for replay. */
1470 clp = sop->so_client;
1471 release_stateowner(sop);
1472 open->op_stateowner = NULL;
1475 if (open->op_seqid == sop->so_seqid - 1) {
1476 if (sop->so_replay.rp_buflen)
1477 return nfserr_replay_me;
1478 /* The original OPEN failed so spectacularly
1479 * that we don't even have replay data saved!
1480 * Therefore, we have no choice but to continue
1481 * processing this OPEN; presumably, we'll
1482 * fail again for the same reason.
1484 dprintk("nfsd4_process_open1: replay with no replay cache\n");
1487 if (open->op_seqid != sop->so_seqid)
1488 return nfserr_bad_seqid;
1490 if (open->op_stateowner == NULL) {
1491 sop = alloc_init_open_stateowner(strhashval, clp, open);
1493 return nfserr_resource;
1494 open->op_stateowner = sop;
1496 list_del_init(&sop->so_close_lru);
1497 renew_client(sop->so_client);
1501 static inline __be32
1502 nfs4_check_delegmode(struct nfs4_delegation *dp, int flags)
1504 if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ))
1505 return nfserr_openmode;
1510 static struct nfs4_delegation *
1511 find_delegation_file(struct nfs4_file *fp, stateid_t *stid)
1513 struct nfs4_delegation *dp;
1515 list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) {
1516 if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid)
1523 nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open,
1524 struct nfs4_delegation **dp)
1527 __be32 status = nfserr_bad_stateid;
1529 *dp = find_delegation_file(fp, &open->op_delegate_stateid);
1532 flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ?
1533 RD_STATE : WR_STATE;
1534 status = nfs4_check_delegmode(*dp, flags);
1538 if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR)
1542 open->op_stateowner->so_confirmed = 1;
1547 nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp)
1549 struct nfs4_stateid *local;
1550 __be32 status = nfserr_share_denied;
1551 struct nfs4_stateowner *sop = open->op_stateowner;
1553 list_for_each_entry(local, &fp->fi_stateids, st_perfile) {
1554 /* ignore lock owners */
1555 if (local->st_stateowner->so_is_open_owner == 0)
1557 /* remember if we have seen this open owner */
1558 if (local->st_stateowner == sop)
1560 /* check for conflicting share reservations */
1561 if (!test_share(local, open))
1569 static inline struct nfs4_stateid *
1570 nfs4_alloc_stateid(void)
1572 return kmem_cache_alloc(stateid_slab, GFP_KERNEL);
1576 nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp,
1577 struct nfs4_delegation *dp,
1578 struct svc_fh *cur_fh, int flags)
1580 struct nfs4_stateid *stp;
1582 stp = nfs4_alloc_stateid();
1584 return nfserr_resource;
1587 get_file(dp->dl_vfs_file);
1588 stp->st_vfs_file = dp->dl_vfs_file;
1591 status = nfsd_open(rqstp, cur_fh, S_IFREG, flags,
1594 if (status == nfserr_dropit)
1595 status = nfserr_jukebox;
1596 kmem_cache_free(stateid_slab, stp);
1604 static inline __be32
1605 nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh,
1606 struct nfsd4_open *open)
1608 struct iattr iattr = {
1609 .ia_valid = ATTR_SIZE,
1612 if (!open->op_truncate)
1614 if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
1615 return nfserr_inval;
1616 return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0);
1620 nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open)
1622 struct file *filp = stp->st_vfs_file;
1623 struct inode *inode = filp->f_path.dentry->d_inode;
1624 unsigned int share_access, new_writer;
1627 set_access(&share_access, stp->st_access_bmap);
1628 new_writer = (~share_access) & open->op_share_access
1629 & NFS4_SHARE_ACCESS_WRITE;
1632 int err = get_write_access(inode);
1634 return nfserrno(err);
1636 status = nfsd4_truncate(rqstp, cur_fh, open);
1639 put_write_access(inode);
1642 /* remember the open */
1643 filp->f_mode |= open->op_share_access;
1644 set_bit(open->op_share_access, &stp->st_access_bmap);
1645 set_bit(open->op_share_deny, &stp->st_deny_bmap);
1652 nfs4_set_claim_prev(struct nfsd4_open *open)
1654 open->op_stateowner->so_confirmed = 1;
1655 open->op_stateowner->so_client->cl_firststate = 1;
1659 * Attempt to hand out a delegation.
1662 nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp)
1664 struct nfs4_delegation *dp;
1665 struct nfs4_stateowner *sop = stp->st_stateowner;
1666 struct nfs4_callback *cb = &sop->so_client->cl_callback;
1667 struct file_lock fl, *flp = &fl;
1668 int status, flag = 0;
1670 flag = NFS4_OPEN_DELEGATE_NONE;
1671 open->op_recall = 0;
1672 switch (open->op_claim_type) {
1673 case NFS4_OPEN_CLAIM_PREVIOUS:
1674 if (!atomic_read(&cb->cb_set))
1675 open->op_recall = 1;
1676 flag = open->op_delegate_type;
1677 if (flag == NFS4_OPEN_DELEGATE_NONE)
1680 case NFS4_OPEN_CLAIM_NULL:
1681 /* Let's not give out any delegations till everyone's
1682 * had the chance to reclaim theirs.... */
1683 if (nfs4_in_grace())
1685 if (!atomic_read(&cb->cb_set) || !sop->so_confirmed)
1687 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
1688 flag = NFS4_OPEN_DELEGATE_WRITE;
1690 flag = NFS4_OPEN_DELEGATE_READ;
1696 dp = alloc_init_deleg(sop->so_client, stp, fh, flag);
1698 flag = NFS4_OPEN_DELEGATE_NONE;
1701 locks_init_lock(&fl);
1702 fl.fl_lmops = &nfsd_lease_mng_ops;
1703 fl.fl_flags = FL_LEASE;
1704 fl.fl_end = OFFSET_MAX;
1705 fl.fl_owner = (fl_owner_t)dp;
1706 fl.fl_file = stp->st_vfs_file;
1707 fl.fl_pid = current->tgid;
1709 /* vfs_setlease checks to see if delegation should be handed out.
1710 * the lock_manager callbacks fl_mylease and fl_change are used
1712 if ((status = vfs_setlease(stp->st_vfs_file,
1713 flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK, &flp))) {
1714 dprintk("NFSD: setlease failed [%d], no delegation\n", status);
1715 unhash_delegation(dp);
1716 flag = NFS4_OPEN_DELEGATE_NONE;
1720 memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid));
1722 dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n",
1723 dp->dl_stateid.si_boot,
1724 dp->dl_stateid.si_stateownerid,
1725 dp->dl_stateid.si_fileid,
1726 dp->dl_stateid.si_generation);
1728 if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS
1729 && flag == NFS4_OPEN_DELEGATE_NONE
1730 && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE)
1731 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
1732 open->op_delegate_type = flag;
1736 * called with nfs4_lock_state() held.
1739 nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
1741 struct nfs4_file *fp = NULL;
1742 struct inode *ino = current_fh->fh_dentry->d_inode;
1743 struct nfs4_stateid *stp = NULL;
1744 struct nfs4_delegation *dp = NULL;
1747 status = nfserr_inval;
1748 if (!access_valid(open->op_share_access)
1749 || !deny_valid(open->op_share_deny))
1752 * Lookup file; if found, lookup stateid and check open request,
1753 * and check for delegations in the process of being recalled.
1754 * If not found, create the nfs4_file struct
1756 fp = find_file(ino);
1758 if ((status = nfs4_check_open(fp, open, &stp)))
1760 status = nfs4_check_deleg(fp, open, &dp);
1764 status = nfserr_bad_stateid;
1765 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
1767 status = nfserr_resource;
1768 fp = alloc_init_file(ino);
1774 * OPEN the file, or upgrade an existing OPEN.
1775 * If truncate fails, the OPEN fails.
1778 /* Stateid was found, this is an OPEN upgrade */
1779 status = nfs4_upgrade_open(rqstp, current_fh, stp, open);
1782 update_stateid(&stp->st_stateid);
1784 /* Stateid was not found, this is a new OPEN */
1786 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
1788 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
1790 status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags);
1793 init_stateid(stp, fp, open);
1794 status = nfsd4_truncate(rqstp, current_fh, open);
1796 release_stateid(stp, OPEN_STATE);
1800 memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t));
1803 * Attempt to hand out a delegation. No error return, because the
1804 * OPEN succeeds even if we fail.
1806 nfs4_open_delegation(current_fh, open, stp);
1810 dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n",
1811 stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid,
1812 stp->st_stateid.si_fileid, stp->st_stateid.si_generation);
1816 if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
1817 nfs4_set_claim_prev(open);
1819 * To finish the open response, we just need to set the rflags.
1821 open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX;
1822 if (!open->op_stateowner->so_confirmed)
1823 open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM;
1828 static struct workqueue_struct *laundry_wq;
1829 static void laundromat_main(struct work_struct *);
1830 static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main);
1833 nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1836 struct nfs4_client *clp;
1840 dprintk("process_renew(%08x/%08x): starting\n",
1841 clid->cl_boot, clid->cl_id);
1842 status = nfserr_stale_clientid;
1843 if (STALE_CLIENTID(clid))
1845 clp = find_confirmed_client(clid);
1846 status = nfserr_expired;
1848 /* We assume the client took too long to RENEW. */
1849 dprintk("nfsd4_renew: clientid not found!\n");
1853 status = nfserr_cb_path_down;
1854 if (!list_empty(&clp->cl_delegations)
1855 && !atomic_read(&clp->cl_callback.cb_set))
1859 nfs4_unlock_state();
1866 dprintk("NFSD: end of grace period\n");
1867 nfsd4_recdir_purge_old();
1872 nfs4_laundromat(void)
1874 struct nfs4_client *clp;
1875 struct nfs4_stateowner *sop;
1876 struct nfs4_delegation *dp;
1877 struct list_head *pos, *next, reaplist;
1878 time_t cutoff = get_seconds() - NFSD_LEASE_TIME;
1879 time_t t, clientid_val = NFSD_LEASE_TIME;
1880 time_t u, test_val = NFSD_LEASE_TIME;
1884 dprintk("NFSD: laundromat service - starting\n");
1887 list_for_each_safe(pos, next, &client_lru) {
1888 clp = list_entry(pos, struct nfs4_client, cl_lru);
1889 if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) {
1890 t = clp->cl_time - cutoff;
1891 if (clientid_val > t)
1895 dprintk("NFSD: purging unused client (clientid %08x)\n",
1896 clp->cl_clientid.cl_id);
1897 nfsd4_remove_clid_dir(clp);
1900 INIT_LIST_HEAD(&reaplist);
1901 spin_lock(&recall_lock);
1902 list_for_each_safe(pos, next, &del_recall_lru) {
1903 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
1904 if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) {
1905 u = dp->dl_time - cutoff;
1910 dprintk("NFSD: purging unused delegation dp %p, fp %p\n",
1912 list_move(&dp->dl_recall_lru, &reaplist);
1914 spin_unlock(&recall_lock);
1915 list_for_each_safe(pos, next, &reaplist) {
1916 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
1917 list_del_init(&dp->dl_recall_lru);
1918 unhash_delegation(dp);
1920 test_val = NFSD_LEASE_TIME;
1921 list_for_each_safe(pos, next, &close_lru) {
1922 sop = list_entry(pos, struct nfs4_stateowner, so_close_lru);
1923 if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) {
1924 u = sop->so_time - cutoff;
1929 dprintk("NFSD: purging unused open stateowner (so_id %d)\n",
1931 release_stateowner(sop);
1933 if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT)
1934 clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT;
1935 nfs4_unlock_state();
1936 return clientid_val;
1940 laundromat_main(struct work_struct *not_used)
1944 t = nfs4_laundromat();
1945 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t);
1946 queue_delayed_work(laundry_wq, &laundromat_work, t*HZ);
1949 static struct nfs4_stateowner *
1950 search_close_lru(u32 st_id, int flags)
1952 struct nfs4_stateowner *local = NULL;
1954 if (flags & CLOSE_STATE) {
1955 list_for_each_entry(local, &close_lru, so_close_lru) {
1956 if (local->so_id == st_id)
1964 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp)
1966 return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode;
1970 STALE_STATEID(stateid_t *stateid)
1972 if (stateid->si_boot == boot_time)
1974 dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n",
1975 stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid,
1976 stateid->si_generation);
1981 access_permit_read(unsigned long access_bmap)
1983 return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) ||
1984 test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) ||
1985 test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap);
1989 access_permit_write(unsigned long access_bmap)
1991 return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) ||
1992 test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap);
1996 __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags)
1998 __be32 status = nfserr_openmode;
2000 if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap)))
2002 if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap)))
2009 static inline __be32
2010 check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags)
2012 /* Trying to call delegreturn with a special stateid? Yuch: */
2013 if (!(flags & (RD_STATE | WR_STATE)))
2014 return nfserr_bad_stateid;
2015 else if (ONE_STATEID(stateid) && (flags & RD_STATE))
2017 else if (nfs4_in_grace()) {
2018 /* Answer in remaining cases depends on existance of
2019 * conflicting state; so we must wait out the grace period. */
2020 return nfserr_grace;
2021 } else if (flags & WR_STATE)
2022 return nfs4_share_conflict(current_fh,
2023 NFS4_SHARE_DENY_WRITE);
2024 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
2025 return nfs4_share_conflict(current_fh,
2026 NFS4_SHARE_DENY_READ);
2030 * Allow READ/WRITE during grace period on recovered state only for files
2031 * that are not able to provide mandatory locking.
2034 io_during_grace_disallowed(struct inode *inode, int flags)
2036 return nfs4_in_grace() && (flags & (RD_STATE | WR_STATE))
2037 && mandatory_lock(inode);
2041 * Checks for stateid operations
2044 nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp)
2046 struct nfs4_stateid *stp = NULL;
2047 struct nfs4_delegation *dp = NULL;
2049 struct inode *ino = current_fh->fh_dentry->d_inode;
2052 dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n",
2053 stateid->si_boot, stateid->si_stateownerid,
2054 stateid->si_fileid, stateid->si_generation);
2058 if (io_during_grace_disallowed(ino, flags))
2059 return nfserr_grace;
2061 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
2062 return check_special_stateids(current_fh, stateid, flags);
2065 status = nfserr_stale_stateid;
2066 if (STALE_STATEID(stateid))
2070 status = nfserr_bad_stateid;
2071 if (!stateid->si_fileid) { /* delegation stateid */
2072 if(!(dp = find_delegation_stateid(ino, stateid))) {
2073 dprintk("NFSD: delegation stateid not found\n");
2076 stidp = &dp->dl_stateid;
2077 } else { /* open or lock stateid */
2078 if (!(stp = find_stateid(stateid, flags))) {
2079 dprintk("NFSD: open or lock stateid not found\n");
2082 if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp))
2084 if (!stp->st_stateowner->so_confirmed)
2086 stidp = &stp->st_stateid;
2088 if (stateid->si_generation > stidp->si_generation)
2092 status = nfserr_old_stateid;
2093 if (stateid->si_generation < stidp->si_generation)
2096 if ((status = nfs4_check_openmode(stp,flags)))
2098 renew_client(stp->st_stateowner->so_client);
2100 *filpp = stp->st_vfs_file;
2102 if ((status = nfs4_check_delegmode(dp, flags)))
2104 renew_client(dp->dl_client);
2105 if (flags & DELEG_RET)
2106 unhash_delegation(dp);
2108 *filpp = dp->dl_vfs_file;
2118 return (type == NFS4_READW_LT || type == NFS4_READ_LT) ?
2119 RD_STATE : WR_STATE;
2123 * Checks for sequence id mutating operations.
2126 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)
2128 struct nfs4_stateid *stp;
2129 struct nfs4_stateowner *sop;
2131 dprintk("NFSD: preprocess_seqid_op: seqid=%d "
2132 "stateid = (%08x/%08x/%08x/%08x)\n", seqid,
2133 stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid,
2134 stateid->si_generation);
2139 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) {
2140 dprintk("NFSD: preprocess_seqid_op: magic stateid!\n");
2141 return nfserr_bad_stateid;
2144 if (STALE_STATEID(stateid))
2145 return nfserr_stale_stateid;
2147 * We return BAD_STATEID if filehandle doesn't match stateid,
2148 * the confirmed flag is incorrecly set, or the generation
2149 * number is incorrect.
2151 stp = find_stateid(stateid, flags);
2154 * Also, we should make sure this isn't just the result of
2157 sop = search_close_lru(stateid->si_stateownerid, flags);
2159 return nfserr_bad_stateid;
2165 struct nfs4_stateowner *sop = stp->st_stateowner;
2166 clientid_t *lockclid = &lock->v.new.clientid;
2167 struct nfs4_client *clp = sop->so_client;
2171 lkflg = setlkflg(lock->lk_type);
2173 if (lock->lk_is_new) {
2174 if (!sop->so_is_open_owner)
2175 return nfserr_bad_stateid;
2176 if (!same_clid(&clp->cl_clientid, lockclid))
2177 return nfserr_bad_stateid;
2178 /* stp is the open stateid */
2179 status = nfs4_check_openmode(stp, lkflg);
2183 /* stp is the lock stateid */
2184 status = nfs4_check_openmode(stp->st_openstp, lkflg);
2190 if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) {
2191 dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n");
2192 return nfserr_bad_stateid;
2196 *sopp = sop = stp->st_stateowner;
2199 * We now validate the seqid and stateid generation numbers.
2200 * For the moment, we ignore the possibility of
2201 * generation number wraparound.
2203 if (seqid != sop->so_seqid)
2206 if (sop->so_confirmed && flags & CONFIRM) {
2207 dprintk("NFSD: preprocess_seqid_op: expected"
2208 " unconfirmed stateowner!\n");
2209 return nfserr_bad_stateid;
2211 if (!sop->so_confirmed && !(flags & CONFIRM)) {
2212 dprintk("NFSD: preprocess_seqid_op: stateowner not"
2213 " confirmed yet!\n");
2214 return nfserr_bad_stateid;
2216 if (stateid->si_generation > stp->st_stateid.si_generation) {
2217 dprintk("NFSD: preprocess_seqid_op: future stateid?!\n");
2218 return nfserr_bad_stateid;
2221 if (stateid->si_generation < stp->st_stateid.si_generation) {
2222 dprintk("NFSD: preprocess_seqid_op: old stateid!\n");
2223 return nfserr_old_stateid;
2225 renew_client(sop->so_client);
2229 if (seqid == sop->so_seqid - 1) {
2230 dprintk("NFSD: preprocess_seqid_op: retransmission?\n");
2231 /* indicate replay to calling function */
2232 return nfserr_replay_me;
2234 dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n",
2235 sop->so_seqid, seqid);
2237 return nfserr_bad_seqid;
2241 nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2242 struct nfsd4_open_confirm *oc)
2245 struct nfs4_stateowner *sop;
2246 struct nfs4_stateid *stp;
2248 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
2249 (int)cstate->current_fh.fh_dentry->d_name.len,
2250 cstate->current_fh.fh_dentry->d_name.name);
2252 status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0);
2258 if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh,
2259 oc->oc_seqid, &oc->oc_req_stateid,
2260 CHECK_FH | CONFIRM | OPEN_STATE,
2261 &oc->oc_stateowner, &stp, NULL)))
2264 sop = oc->oc_stateowner;
2265 sop->so_confirmed = 1;
2266 update_stateid(&stp->st_stateid);
2267 memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t));
2268 dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d "
2269 "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid,
2270 stp->st_stateid.si_boot,
2271 stp->st_stateid.si_stateownerid,
2272 stp->st_stateid.si_fileid,
2273 stp->st_stateid.si_generation);
2275 nfsd4_create_clid_dir(sop->so_client);
2277 if (oc->oc_stateowner) {
2278 nfs4_get_stateowner(oc->oc_stateowner);
2279 cstate->replay_owner = oc->oc_stateowner;
2281 nfs4_unlock_state();
2287 * unset all bits in union bitmap (bmap) that
2288 * do not exist in share (from successful OPEN_DOWNGRADE)
2291 reset_union_bmap_access(unsigned long access, unsigned long *bmap)
2294 for (i = 1; i < 4; i++) {
2295 if ((i & access) != i)
2296 __clear_bit(i, bmap);
2301 reset_union_bmap_deny(unsigned long deny, unsigned long *bmap)
2304 for (i = 0; i < 4; i++) {
2305 if ((i & deny) != i)
2306 __clear_bit(i, bmap);
2311 nfsd4_open_downgrade(struct svc_rqst *rqstp,
2312 struct nfsd4_compound_state *cstate,
2313 struct nfsd4_open_downgrade *od)
2316 struct nfs4_stateid *stp;
2317 unsigned int share_access;
2319 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
2320 (int)cstate->current_fh.fh_dentry->d_name.len,
2321 cstate->current_fh.fh_dentry->d_name.name);
2323 if (!access_valid(od->od_share_access)
2324 || !deny_valid(od->od_share_deny))
2325 return nfserr_inval;
2328 if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh,
2331 CHECK_FH | OPEN_STATE,
2332 &od->od_stateowner, &stp, NULL)))
2335 status = nfserr_inval;
2336 if (!test_bit(od->od_share_access, &stp->st_access_bmap)) {
2337 dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n",
2338 stp->st_access_bmap, od->od_share_access);
2341 if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) {
2342 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
2343 stp->st_deny_bmap, od->od_share_deny);
2346 set_access(&share_access, stp->st_access_bmap);
2347 nfs4_file_downgrade(stp->st_vfs_file,
2348 share_access & ~od->od_share_access);
2350 reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap);
2351 reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap);
2353 update_stateid(&stp->st_stateid);
2354 memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t));
2357 if (od->od_stateowner) {
2358 nfs4_get_stateowner(od->od_stateowner);
2359 cstate->replay_owner = od->od_stateowner;
2361 nfs4_unlock_state();
2366 * nfs4_unlock_state() called after encode
2369 nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2370 struct nfsd4_close *close)
2373 struct nfs4_stateid *stp;
2375 dprintk("NFSD: nfsd4_close on file %.*s\n",
2376 (int)cstate->current_fh.fh_dentry->d_name.len,
2377 cstate->current_fh.fh_dentry->d_name.name);
2380 /* check close_lru for replay */
2381 if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh,
2384 CHECK_FH | OPEN_STATE | CLOSE_STATE,
2385 &close->cl_stateowner, &stp, NULL)))
2388 update_stateid(&stp->st_stateid);
2389 memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t));
2391 /* release_stateid() calls nfsd_close() if needed */
2392 release_stateid(stp, OPEN_STATE);
2394 /* place unused nfs4_stateowners on so_close_lru list to be
2395 * released by the laundromat service after the lease period
2396 * to enable us to handle CLOSE replay
2398 if (list_empty(&close->cl_stateowner->so_stateids))
2399 move_to_close_lru(close->cl_stateowner);
2401 if (close->cl_stateowner) {
2402 nfs4_get_stateowner(close->cl_stateowner);
2403 cstate->replay_owner = close->cl_stateowner;
2405 nfs4_unlock_state();
2410 nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2411 struct nfsd4_delegreturn *dr)
2415 if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
2419 status = nfs4_preprocess_stateid_op(&cstate->current_fh,
2420 &dr->dr_stateid, DELEG_RET, NULL);
2421 nfs4_unlock_state();
2428 * Lock owner state (byte-range locks)
2430 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
2431 #define LOCK_HASH_BITS 8
2432 #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS)
2433 #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1)
2435 #define lockownerid_hashval(id) \
2436 ((id) & LOCK_HASH_MASK)
2438 static inline unsigned int
2439 lock_ownerstr_hashval(struct inode *inode, u32 cl_id,
2440 struct xdr_netobj *ownername)
2442 return (file_hashval(inode) + cl_id
2443 + opaque_hashval(ownername->data, ownername->len))
2447 static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE];
2448 static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE];
2449 static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE];
2451 static struct nfs4_stateid *
2452 find_stateid(stateid_t *stid, int flags)
2454 struct nfs4_stateid *local = NULL;
2455 u32 st_id = stid->si_stateownerid;
2456 u32 f_id = stid->si_fileid;
2457 unsigned int hashval;
2459 dprintk("NFSD: find_stateid flags 0x%x\n",flags);
2460 if ((flags & LOCK_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) {
2461 hashval = stateid_hashval(st_id, f_id);
2462 list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) {
2463 if ((local->st_stateid.si_stateownerid == st_id) &&
2464 (local->st_stateid.si_fileid == f_id))
2468 if ((flags & OPEN_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) {
2469 hashval = stateid_hashval(st_id, f_id);
2470 list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) {
2471 if ((local->st_stateid.si_stateownerid == st_id) &&
2472 (local->st_stateid.si_fileid == f_id))
2479 static struct nfs4_delegation *
2480 find_delegation_stateid(struct inode *ino, stateid_t *stid)
2482 struct nfs4_file *fp;
2483 struct nfs4_delegation *dl;
2485 dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n",
2486 stid->si_boot, stid->si_stateownerid,
2487 stid->si_fileid, stid->si_generation);
2489 fp = find_file(ino);
2492 dl = find_delegation_file(fp, stid);
2498 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
2499 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
2500 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
2501 * locking, this prevents us from being completely protocol-compliant. The
2502 * real solution to this problem is to start using unsigned file offsets in
2503 * the VFS, but this is a very deep change!
2506 nfs4_transform_lock_offset(struct file_lock *lock)
2508 if (lock->fl_start < 0)
2509 lock->fl_start = OFFSET_MAX;
2510 if (lock->fl_end < 0)
2511 lock->fl_end = OFFSET_MAX;
2514 /* Hack!: For now, we're defining this just so we can use a pointer to it
2515 * as a unique cookie to identify our (NFSv4's) posix locks. */
2516 static struct lock_manager_operations nfsd_posix_mng_ops = {
2520 nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny)
2522 struct nfs4_stateowner *sop;
2525 if (fl->fl_lmops == &nfsd_posix_mng_ops) {
2526 sop = (struct nfs4_stateowner *) fl->fl_owner;
2527 hval = lockownerid_hashval(sop->so_id);
2528 kref_get(&sop->so_ref);
2530 deny->ld_clientid = sop->so_client->cl_clientid;
2532 deny->ld_sop = NULL;
2533 deny->ld_clientid.cl_boot = 0;
2534 deny->ld_clientid.cl_id = 0;
2536 deny->ld_start = fl->fl_start;
2537 deny->ld_length = ~(u64)0;
2538 if (fl->fl_end != ~(u64)0)
2539 deny->ld_length = fl->fl_end - fl->fl_start + 1;
2540 deny->ld_type = NFS4_READ_LT;
2541 if (fl->fl_type != F_RDLCK)
2542 deny->ld_type = NFS4_WRITE_LT;
2545 static struct nfs4_stateowner *
2546 find_lockstateowner_str(struct inode *inode, clientid_t *clid,
2547 struct xdr_netobj *owner)
2549 unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner);
2550 struct nfs4_stateowner *op;
2552 list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) {
2553 if (same_owner_str(op, owner, clid))
2560 * Alloc a lock owner structure.
2561 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
2564 * strhashval = lock_ownerstr_hashval
2567 static struct nfs4_stateowner *
2568 alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) {
2569 struct nfs4_stateowner *sop;
2570 struct nfs4_replay *rp;
2571 unsigned int idhashval;
2573 if (!(sop = alloc_stateowner(&lock->lk_new_owner)))
2575 idhashval = lockownerid_hashval(current_ownerid);
2576 INIT_LIST_HEAD(&sop->so_idhash);
2577 INIT_LIST_HEAD(&sop->so_strhash);
2578 INIT_LIST_HEAD(&sop->so_perclient);
2579 INIT_LIST_HEAD(&sop->so_stateids);
2580 INIT_LIST_HEAD(&sop->so_perstateid);
2581 INIT_LIST_HEAD(&sop->so_close_lru); /* not used */
2583 list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]);
2584 list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]);
2585 list_add(&sop->so_perstateid, &open_stp->st_lockowners);
2586 sop->so_is_open_owner = 0;
2587 sop->so_id = current_ownerid++;
2588 sop->so_client = clp;
2589 /* It is the openowner seqid that will be incremented in encode in the
2590 * case of new lockowners; so increment the lock seqid manually: */
2591 sop->so_seqid = lock->lk_new_lock_seqid + 1;
2592 sop->so_confirmed = 1;
2593 rp = &sop->so_replay;
2594 rp->rp_status = nfserr_serverfault;
2596 rp->rp_buf = rp->rp_ibuf;
2600 static struct nfs4_stateid *
2601 alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp)
2603 struct nfs4_stateid *stp;
2604 unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id);
2606 stp = nfs4_alloc_stateid();
2609 INIT_LIST_HEAD(&stp->st_hash);
2610 INIT_LIST_HEAD(&stp->st_perfile);
2611 INIT_LIST_HEAD(&stp->st_perstateowner);
2612 INIT_LIST_HEAD(&stp->st_lockowners); /* not used */
2613 list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]);
2614 list_add(&stp->st_perfile, &fp->fi_stateids);
2615 list_add(&stp->st_perstateowner, &sop->so_stateids);
2616 stp->st_stateowner = sop;
2619 stp->st_stateid.si_boot = boot_time;
2620 stp->st_stateid.si_stateownerid = sop->so_id;
2621 stp->st_stateid.si_fileid = fp->fi_id;
2622 stp->st_stateid.si_generation = 0;
2623 stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */
2624 stp->st_access_bmap = open_stp->st_access_bmap;
2625 stp->st_deny_bmap = open_stp->st_deny_bmap;
2626 stp->st_openstp = open_stp;
2633 check_lock_length(u64 offset, u64 length)
2635 return ((length == 0) || ((length != ~(u64)0) &&
2636 LOFF_OVERFLOW(offset, length)));
2643 nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2644 struct nfsd4_lock *lock)
2646 struct nfs4_stateowner *open_sop = NULL;
2647 struct nfs4_stateowner *lock_sop = NULL;
2648 struct nfs4_stateid *lock_stp;
2650 struct file_lock file_lock;
2651 struct file_lock conflock;
2653 unsigned int strhashval;
2657 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
2658 (long long) lock->lk_offset,
2659 (long long) lock->lk_length);
2661 if (check_lock_length(lock->lk_offset, lock->lk_length))
2662 return nfserr_inval;
2664 if ((status = fh_verify(rqstp, &cstate->current_fh,
2665 S_IFREG, MAY_LOCK))) {
2666 dprintk("NFSD: nfsd4_lock: permission denied!\n");
2672 if (lock->lk_is_new) {
2674 * Client indicates that this is a new lockowner.
2675 * Use open owner and open stateid to create lock owner and
2678 struct nfs4_stateid *open_stp = NULL;
2679 struct nfs4_file *fp;
2681 status = nfserr_stale_clientid;
2682 if (STALE_CLIENTID(&lock->lk_new_clientid))
2685 /* validate and update open stateid and open seqid */
2686 status = nfs4_preprocess_seqid_op(&cstate->current_fh,
2687 lock->lk_new_open_seqid,
2688 &lock->lk_new_open_stateid,
2689 CHECK_FH | OPEN_STATE,
2690 &lock->lk_replay_owner, &open_stp,
2694 open_sop = lock->lk_replay_owner;
2695 /* create lockowner and lock stateid */
2696 fp = open_stp->st_file;
2697 strhashval = lock_ownerstr_hashval(fp->fi_inode,
2698 open_sop->so_client->cl_clientid.cl_id,
2699 &lock->v.new.owner);
2700 /* XXX: Do we need to check for duplicate stateowners on
2701 * the same file, or should they just be allowed (and
2702 * create new stateids)? */
2703 status = nfserr_resource;
2704 lock_sop = alloc_init_lock_stateowner(strhashval,
2705 open_sop->so_client, open_stp, lock);
2706 if (lock_sop == NULL)
2708 lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp);
2709 if (lock_stp == NULL)
2712 /* lock (lock owner + lock stateid) already exists */
2713 status = nfs4_preprocess_seqid_op(&cstate->current_fh,
2714 lock->lk_old_lock_seqid,
2715 &lock->lk_old_lock_stateid,
2716 CHECK_FH | LOCK_STATE,
2717 &lock->lk_replay_owner, &lock_stp, lock);
2720 lock_sop = lock->lk_replay_owner;
2722 /* lock->lk_replay_owner and lock_stp have been created or found */
2723 filp = lock_stp->st_vfs_file;
2725 status = nfserr_grace;
2726 if (nfs4_in_grace() && !lock->lk_reclaim)
2728 status = nfserr_no_grace;
2729 if (!nfs4_in_grace() && lock->lk_reclaim)
2732 locks_init_lock(&file_lock);
2733 switch (lock->lk_type) {
2736 file_lock.fl_type = F_RDLCK;
2740 case NFS4_WRITEW_LT:
2741 file_lock.fl_type = F_WRLCK;
2745 status = nfserr_inval;
2748 file_lock.fl_owner = (fl_owner_t)lock_sop;
2749 file_lock.fl_pid = current->tgid;
2750 file_lock.fl_file = filp;
2751 file_lock.fl_flags = FL_POSIX;
2752 file_lock.fl_lmops = &nfsd_posix_mng_ops;
2754 file_lock.fl_start = lock->lk_offset;
2755 if ((lock->lk_length == ~(u64)0) ||
2756 LOFF_OVERFLOW(lock->lk_offset, lock->lk_length))
2757 file_lock.fl_end = ~(u64)0;
2759 file_lock.fl_end = lock->lk_offset + lock->lk_length - 1;
2760 nfs4_transform_lock_offset(&file_lock);
2763 * Try to lock the file in the VFS.
2764 * Note: locks.c uses the BKL to protect the inode's lock list.
2767 /* XXX?: Just to divert the locks_release_private at the start of
2768 * locks_copy_lock: */
2769 locks_init_lock(&conflock);
2770 err = vfs_lock_file(filp, cmd, &file_lock, &conflock);
2772 case 0: /* success! */
2773 update_stateid(&lock_stp->st_stateid);
2774 memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid,
2778 case (EAGAIN): /* conflock holds conflicting lock */
2779 status = nfserr_denied;
2780 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
2781 nfs4_set_lock_denied(&conflock, &lock->lk_denied);
2784 status = nfserr_deadlock;
2787 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err);
2788 status = nfserr_resource;
2792 if (status && lock->lk_is_new && lock_sop)
2793 release_stateowner(lock_sop);
2794 if (lock->lk_replay_owner) {
2795 nfs4_get_stateowner(lock->lk_replay_owner);
2796 cstate->replay_owner = lock->lk_replay_owner;
2798 nfs4_unlock_state();
2806 nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2807 struct nfsd4_lockt *lockt)
2809 struct inode *inode;
2811 struct file_lock file_lock;
2815 if (nfs4_in_grace())
2816 return nfserr_grace;
2818 if (check_lock_length(lockt->lt_offset, lockt->lt_length))
2819 return nfserr_inval;
2821 lockt->lt_stateowner = NULL;
2824 status = nfserr_stale_clientid;
2825 if (STALE_CLIENTID(&lockt->lt_clientid))
2828 if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) {
2829 dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n");
2830 if (status == nfserr_symlink)
2831 status = nfserr_inval;
2835 inode = cstate->current_fh.fh_dentry->d_inode;
2836 locks_init_lock(&file_lock);
2837 switch (lockt->lt_type) {
2840 file_lock.fl_type = F_RDLCK;
2843 case NFS4_WRITEW_LT:
2844 file_lock.fl_type = F_WRLCK;
2847 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
2848 status = nfserr_inval;
2852 lockt->lt_stateowner = find_lockstateowner_str(inode,
2853 &lockt->lt_clientid, &lockt->lt_owner);
2854 if (lockt->lt_stateowner)
2855 file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner;
2856 file_lock.fl_pid = current->tgid;
2857 file_lock.fl_flags = FL_POSIX;
2858 file_lock.fl_lmops = &nfsd_posix_mng_ops;
2860 file_lock.fl_start = lockt->lt_offset;
2861 if ((lockt->lt_length == ~(u64)0) || LOFF_OVERFLOW(lockt->lt_offset, lockt->lt_length))
2862 file_lock.fl_end = ~(u64)0;
2864 file_lock.fl_end = lockt->lt_offset + lockt->lt_length - 1;
2866 nfs4_transform_lock_offset(&file_lock);
2868 /* vfs_test_lock uses the struct file _only_ to resolve the inode.
2869 * since LOCKT doesn't require an OPEN, and therefore a struct
2870 * file may not exist, pass vfs_test_lock a struct file with
2871 * only the dentry:inode set.
2873 memset(&file, 0, sizeof (struct file));
2874 file.f_path.dentry = cstate->current_fh.fh_dentry;
2877 error = vfs_test_lock(&file, &file_lock);
2879 status = nfserrno(error);
2882 if (file_lock.fl_type != F_UNLCK) {
2883 status = nfserr_denied;
2884 nfs4_set_lock_denied(&file_lock, &lockt->lt_denied);
2887 nfs4_unlock_state();
2892 nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2893 struct nfsd4_locku *locku)
2895 struct nfs4_stateid *stp;
2896 struct file *filp = NULL;
2897 struct file_lock file_lock;
2901 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
2902 (long long) locku->lu_offset,
2903 (long long) locku->lu_length);
2905 if (check_lock_length(locku->lu_offset, locku->lu_length))
2906 return nfserr_inval;
2910 if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh,
2913 CHECK_FH | LOCK_STATE,
2914 &locku->lu_stateowner, &stp, NULL)))
2917 filp = stp->st_vfs_file;
2919 locks_init_lock(&file_lock);
2920 file_lock.fl_type = F_UNLCK;
2921 file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner;
2922 file_lock.fl_pid = current->tgid;
2923 file_lock.fl_file = filp;
2924 file_lock.fl_flags = FL_POSIX;
2925 file_lock.fl_lmops = &nfsd_posix_mng_ops;
2926 file_lock.fl_start = locku->lu_offset;
2928 if ((locku->lu_length == ~(u64)0) || LOFF_OVERFLOW(locku->lu_offset, locku->lu_length))
2929 file_lock.fl_end = ~(u64)0;
2931 file_lock.fl_end = locku->lu_offset + locku->lu_length - 1;
2932 nfs4_transform_lock_offset(&file_lock);
2935 * Try to unlock the file in the VFS.
2937 err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL);
2939 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
2943 * OK, unlock succeeded; the only thing left to do is update the stateid.
2945 update_stateid(&stp->st_stateid);
2946 memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t));
2949 if (locku->lu_stateowner) {
2950 nfs4_get_stateowner(locku->lu_stateowner);
2951 cstate->replay_owner = locku->lu_stateowner;
2953 nfs4_unlock_state();
2957 status = nfserrno(err);
2963 * 1: locks held by lockowner
2964 * 0: no locks held by lockowner
2967 check_for_locks(struct file *filp, struct nfs4_stateowner *lowner)
2969 struct file_lock **flpp;
2970 struct inode *inode = filp->f_path.dentry->d_inode;
2974 for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) {
2975 if ((*flpp)->fl_owner == (fl_owner_t)lowner) {
2986 nfsd4_release_lockowner(struct svc_rqst *rqstp,
2987 struct nfsd4_compound_state *cstate,
2988 struct nfsd4_release_lockowner *rlockowner)
2990 clientid_t *clid = &rlockowner->rl_clientid;
2991 struct nfs4_stateowner *sop;
2992 struct nfs4_stateid *stp;
2993 struct xdr_netobj *owner = &rlockowner->rl_owner;
2994 struct list_head matches;
2998 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
2999 clid->cl_boot, clid->cl_id);
3001 /* XXX check for lease expiration */
3003 status = nfserr_stale_clientid;
3004 if (STALE_CLIENTID(clid))
3009 status = nfserr_locks_held;
3010 /* XXX: we're doing a linear search through all the lockowners.
3011 * Yipes! For now we'll just hope clients aren't really using
3012 * release_lockowner much, but eventually we have to fix these
3013 * data structures. */
3014 INIT_LIST_HEAD(&matches);
3015 for (i = 0; i < LOCK_HASH_SIZE; i++) {
3016 list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) {
3017 if (!same_owner_str(sop, owner, clid))
3019 list_for_each_entry(stp, &sop->so_stateids,
3021 if (check_for_locks(stp->st_vfs_file, sop))
3023 /* Note: so_perclient unused for lockowners,
3024 * so it's OK to fool with here. */
3025 list_add(&sop->so_perclient, &matches);
3029 /* Clients probably won't expect us to return with some (but not all)
3030 * of the lockowner state released; so don't release any until all
3031 * have been checked. */
3033 while (!list_empty(&matches)) {
3034 sop = list_entry(matches.next, struct nfs4_stateowner,
3036 /* unhash_stateowner deletes so_perclient only
3037 * for openowners. */
3038 list_del(&sop->so_perclient);
3039 release_stateowner(sop);
3042 nfs4_unlock_state();
3046 static inline struct nfs4_client_reclaim *
3049 return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL);
3053 nfs4_has_reclaimed_state(const char *name)
3055 unsigned int strhashval = clientstr_hashval(name);
3056 struct nfs4_client *clp;
3058 clp = find_confirmed_client_by_str(name, strhashval);
3063 * failure => all reset bets are off, nfserr_no_grace...
3066 nfs4_client_to_reclaim(const char *name)
3068 unsigned int strhashval;
3069 struct nfs4_client_reclaim *crp = NULL;
3071 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name);
3072 crp = alloc_reclaim();
3075 strhashval = clientstr_hashval(name);
3076 INIT_LIST_HEAD(&crp->cr_strhash);
3077 list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]);
3078 memcpy(crp->cr_recdir, name, HEXDIR_LEN);
3079 reclaim_str_hashtbl_size++;
3084 nfs4_release_reclaim(void)
3086 struct nfs4_client_reclaim *crp = NULL;
3089 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
3090 while (!list_empty(&reclaim_str_hashtbl[i])) {
3091 crp = list_entry(reclaim_str_hashtbl[i].next,
3092 struct nfs4_client_reclaim, cr_strhash);
3093 list_del(&crp->cr_strhash);
3095 reclaim_str_hashtbl_size--;
3098 BUG_ON(reclaim_str_hashtbl_size);
3102 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
3103 static struct nfs4_client_reclaim *
3104 nfs4_find_reclaim_client(clientid_t *clid)
3106 unsigned int strhashval;
3107 struct nfs4_client *clp;
3108 struct nfs4_client_reclaim *crp = NULL;
3111 /* find clientid in conf_id_hashtbl */
3112 clp = find_confirmed_client(clid);
3116 dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n",
3117 clp->cl_name.len, clp->cl_name.data,
3120 /* find clp->cl_name in reclaim_str_hashtbl */
3121 strhashval = clientstr_hashval(clp->cl_recdir);
3122 list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) {
3123 if (same_name(crp->cr_recdir, clp->cl_recdir)) {
3131 * Called from OPEN. Look for clientid in reclaim list.
3134 nfs4_check_open_reclaim(clientid_t *clid)
3136 return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad;
3139 /* initialization to perform at module load time: */
3142 nfs4_state_init(void)
3146 status = nfsd4_init_slabs();
3149 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
3150 INIT_LIST_HEAD(&conf_id_hashtbl[i]);
3151 INIT_LIST_HEAD(&conf_str_hashtbl[i]);
3152 INIT_LIST_HEAD(&unconf_str_hashtbl[i]);
3153 INIT_LIST_HEAD(&unconf_id_hashtbl[i]);
3155 for (i = 0; i < FILE_HASH_SIZE; i++) {
3156 INIT_LIST_HEAD(&file_hashtbl[i]);
3158 for (i = 0; i < OWNER_HASH_SIZE; i++) {
3159 INIT_LIST_HEAD(&ownerstr_hashtbl[i]);
3160 INIT_LIST_HEAD(&ownerid_hashtbl[i]);
3162 for (i = 0; i < STATEID_HASH_SIZE; i++) {
3163 INIT_LIST_HEAD(&stateid_hashtbl[i]);
3164 INIT_LIST_HEAD(&lockstateid_hashtbl[i]);
3166 for (i = 0; i < LOCK_HASH_SIZE; i++) {
3167 INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]);
3168 INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]);
3170 memset(&onestateid, ~0, sizeof(stateid_t));
3171 INIT_LIST_HEAD(&close_lru);
3172 INIT_LIST_HEAD(&client_lru);
3173 INIT_LIST_HEAD(&del_recall_lru);
3174 for (i = 0; i < CLIENT_HASH_SIZE; i++)
3175 INIT_LIST_HEAD(&reclaim_str_hashtbl[i]);
3176 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");
3194 get_nfs4_grace_period(void)
3196 return max(user_lease_time, lease_time) * HZ;
3200 * Since the lifetime of a delegation isn't limited to that of an open, a
3201 * client may quite reasonably hang on to a delegation as long as it has
3202 * the inode cached. This becomes an obvious problem the first time a
3203 * client's inode cache approaches the size of the server's total memory.
3205 * For now we avoid this problem by imposing a hard limit on the number
3206 * of delegations, which varies according to the server's memory size.
3209 set_max_delegations(void)
3212 * Allow at most 4 delegations per megabyte of RAM. Quick
3213 * estimates suggest that in the worst case (where every delegation
3214 * is for a different inode), a delegation could take about 1.5K,
3215 * giving a worst case usage of about 6% of memory.
3217 max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT);
3220 /* initialization to perform when the nfsd service is started: */
3223 __nfs4_state_start(void)
3225 unsigned long grace_time;
3227 boot_time = get_seconds();
3228 grace_time = get_nfs_grace_period();
3229 lease_time = user_lease_time;
3231 printk(KERN_INFO "NFSD: starting %ld-second grace period\n",
3233 laundry_wq = create_singlethread_workqueue("nfsd4");
3234 queue_delayed_work(laundry_wq, &laundromat_work, grace_time);
3235 set_max_delegations();
3239 nfs4_state_start(void)
3243 nfsd4_load_reboot_recovery_data();
3244 __nfs4_state_start();
3256 nfs4_lease_time(void)
3262 __nfs4_state_shutdown(void)
3265 struct nfs4_client *clp = NULL;
3266 struct nfs4_delegation *dp = NULL;
3267 struct list_head *pos, *next, reaplist;
3269 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
3270 while (!list_empty(&conf_id_hashtbl[i])) {
3271 clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
3274 while (!list_empty(&unconf_str_hashtbl[i])) {
3275 clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash);
3279 INIT_LIST_HEAD(&reaplist);
3280 spin_lock(&recall_lock);
3281 list_for_each_safe(pos, next, &del_recall_lru) {
3282 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
3283 list_move(&dp->dl_recall_lru, &reaplist);
3285 spin_unlock(&recall_lock);
3286 list_for_each_safe(pos, next, &reaplist) {
3287 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
3288 list_del_init(&dp->dl_recall_lru);
3289 unhash_delegation(dp);
3292 nfsd4_shutdown_recdir();
3297 nfs4_state_shutdown(void)
3299 cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work);
3300 destroy_workqueue(laundry_wq);
3302 nfs4_release_reclaim();
3303 __nfs4_state_shutdown();
3304 nfs4_unlock_state();
3308 nfs4_set_recdir(char *recdir)
3311 strcpy(user_recovery_dirname, recdir);
3312 nfs4_unlock_state();
3316 * Change the NFSv4 recovery directory to recdir.
3319 nfs4_reset_recoverydir(char *recdir)
3322 struct nameidata nd;
3324 status = path_lookup(recdir, LOOKUP_FOLLOW, &nd);
3328 if (S_ISDIR(nd.dentry->d_inode->i_mode)) {
3329 nfs4_set_recdir(recdir);
3337 * Called when leasetime is changed.
3339 * The only way the protocol gives us to handle on-the-fly lease changes is to
3340 * simulate a reboot. Instead of doing that, we just wait till the next time
3341 * we start to register any changes in lease time. If the administrator
3342 * really wants to change the lease time *now*, they can go ahead and bring
3343 * nfsd down and then back up again after changing the lease time.
3346 nfs4_reset_lease(time_t leasetime)
3349 user_lease_time = leasetime;