/*
* linux/fs/nfsd/nfs4state.c
*
* Copyright (c) 2001 The Regents of the University of Michigan.
* All rights reserved.
*
* Kendrick Smith <kmsmith@umich.edu>
* Andy Adamson <kandros@umich.edu>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <linux/param.h>
#include <linux/major.h>
#include <linux/slab.h>
#include <linux/sunrpc/svc.h>
#include <linux/nfsd/nfsd.h>
#include <linux/nfsd/cache.h>
#include <linux/mount.h>
#include <linux/workqueue.h>
#include <linux/smp_lock.h>
#include <linux/nfs4.h>
#include <linux/nfsd/state.h>
#include <linux/nfsd/xdr4.h>
#define NFSDDBG_FACILITY NFSDDBG_PROC
/* Globals */
time_t boot_time;
static u32 current_clientid = 1;
static u32 current_ownerid;
static u32 current_fileid;
static u32 nfs4_init;
stateid_t zerostateid; /* bits all 0 */
stateid_t onestateid; /* bits all 1 */
/* debug counters */
u32 list_add_perfile = 0;
u32 list_del_perfile = 0;
u32 add_perclient = 0;
u32 del_perclient = 0;
u32 alloc_file = 0;
u32 free_file = 0;
u32 alloc_sowner = 0;
u32 free_sowner = 0;
u32 vfsopen = 0;
u32 vfsclose = 0;
u32 alloc_lsowner= 0;
/* forward declarations */
struct nfs4_stateid * find_stateid(stateid_t *stid, int flags);
/* Locking:
*
* client_sema:
* protects clientid_hashtbl[], clientstr_hashtbl[],
* unconfstr_hashtbl[], uncofid_hashtbl[].
*/
static struct semaphore client_sema;
void
nfs4_lock_state(void)
{
down(&client_sema);
}
void
nfs4_unlock_state(void)
{
up(&client_sema);
}
static inline u32
opaque_hashval(const void *ptr, int nbytes)
{
unsigned char *cptr = (unsigned char *) ptr;
u32 x = 0;
while (nbytes--) {
x *= 37;
x += *cptr++;
}
return x;
}
/* forward declarations */
static void release_stateowner(struct nfs4_stateowner *sop);
static void release_stateid(struct nfs4_stateid *stp, int flags);
static void release_file(struct nfs4_file *fp);
/*
* SETCLIENTID state
*/
/* Hash tables for nfs4_clientid state */
#define CLIENT_HASH_BITS 4
#define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
#define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
#define clientid_hashval(id) \
((id) & CLIENT_HASH_MASK)
#define clientstr_hashval(name, namelen) \
(opaque_hashval((name), (namelen)) & CLIENT_HASH_MASK)
/* conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed
* setclientid_confirmed info.
*
* unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed
* setclientid info.
*
* client_lru holds client queue ordered by nfs4_client.cl_time
* for lease renewal.
*/
static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE];
static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE];
static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE];
static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE];
static struct list_head client_lru;
static inline void
renew_client(struct nfs4_client *clp)
{
/*
* Move client to the end to the LRU list.
*/
dprintk("renewing client (clientid %08x/%08x)\n",
clp->cl_clientid.cl_boot,
clp->cl_clientid.cl_id);
list_move_tail(&clp->cl_lru, &client_lru);
clp->cl_time = get_seconds();
}
/* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
static int
STALE_CLIENTID(clientid_t *clid)
{
if (clid->cl_boot == boot_time)
return 0;
dprintk("NFSD stale clientid (%08x/%08x)\n",
clid->cl_boot, clid->cl_id);
return 1;
}
/*
* XXX Should we use a slab cache ?
* This type of memory management is somewhat inefficient, but we use it
* anyway since SETCLIENTID is not a common operation.
*/
static inline struct nfs4_client *
alloc_client(struct xdr_netobj name)
{
struct nfs4_client *clp;
if ((clp = kmalloc(sizeof(struct nfs4_client), GFP_KERNEL))!= NULL) {
memset(clp, 0, sizeof(*clp));
if ((clp->cl_name.data = kmalloc(name.len, GFP_KERNEL)) != NULL) {
memcpy(clp->cl_name.data, name.data, name.len);
clp->cl_name.len = name.len;
}
else {
kfree(clp);
clp = NULL;
}
}
return clp;
}
static inline void
free_client(struct nfs4_client *clp)
{
if (clp->cl_cred.cr_group_info)
put_group_info(clp->cl_cred.cr_group_info);
kfree(clp->cl_name.data);
kfree(clp);
}
static void
expire_client(struct nfs4_client *clp)
{
struct nfs4_stateowner *sop;
dprintk("NFSD: expire_client\n");
list_del(&clp->cl_idhash);
list_del(&clp->cl_strhash);
list_del(&clp->cl_lru);
while (!list_empty(&clp->cl_perclient)) {
sop = list_entry(clp->cl_perclient.next, struct nfs4_stateowner, so_perclient);
release_stateowner(sop);
}
free_client(clp);
}
static struct nfs4_client *
create_client(struct xdr_netobj name) {
struct nfs4_client *clp;
if(!(clp = alloc_client(name)))
goto out;
INIT_LIST_HEAD(&clp->cl_idhash);
INIT_LIST_HEAD(&clp->cl_strhash);
INIT_LIST_HEAD(&clp->cl_perclient);
INIT_LIST_HEAD(&clp->cl_lru);
out:
return clp;
}
static void
copy_verf(struct nfs4_client *target, nfs4_verifier *source) {
memcpy(target->cl_verifier.data, source->data, sizeof(target->cl_verifier.data));
}
static void
copy_clid(struct nfs4_client *target, struct nfs4_client *source) {
target->cl_clientid.cl_boot = source->cl_clientid.cl_boot;
target->cl_clientid.cl_id = source->cl_clientid.cl_id;
}
static void
copy_cred(struct svc_cred *target, struct svc_cred *source) {
target->cr_uid = source->cr_uid;
target->cr_gid = source->cr_gid;
target->cr_group_info = source->cr_group_info;
get_group_info(target->cr_group_info);
}
static int
cmp_name(struct xdr_netobj *n1, struct xdr_netobj *n2) {
if(!n1 || !n2)
return 0;
return((n1->len == n2->len) && !memcmp(n1->data, n2->data, n2->len));
}
static int
cmp_verf(nfs4_verifier *v1, nfs4_verifier *v2) {
return(!memcmp(v1->data,v2->data,sizeof(v1->data)));
}
static int
cmp_clid(clientid_t * cl1, clientid_t * cl2) {
return((cl1->cl_boot == cl2->cl_boot) &&
(cl1->cl_id == cl2->cl_id));
}
/* XXX what about NGROUP */
static int
cmp_creds(struct svc_cred *cr1, struct svc_cred *cr2){
return(cr1->cr_uid == cr2->cr_uid);
}
static void
gen_clid(struct nfs4_client *clp) {
clp->cl_clientid.cl_boot = boot_time;
clp->cl_clientid.cl_id = current_clientid++;
}
static void
gen_confirm(struct nfs4_client *clp) {
struct timespec tv;
u32 * p;
tv = CURRENT_TIME;
p = (u32 *)clp->cl_confirm.data;
*p++ = tv.tv_sec;
*p++ = tv.tv_nsec;
}
static int
check_name(struct xdr_netobj name) {
if (name.len == 0)
return 0;
if (name.len > NFS4_OPAQUE_LIMIT) {
printk("NFSD: check_name: name too long(%d)!\n", name.len);
return 0;
}
return 1;
}
void
add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval)
{
unsigned int idhashval;
list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]);
idhashval = clientid_hashval(clp->cl_clientid.cl_id);
list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]);
list_add_tail(&clp->cl_lru, &client_lru);
clp->cl_time = get_seconds();
}
void
move_to_confirmed(struct nfs4_client *clp, unsigned int idhashval)
{
unsigned int strhashval;
dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp);
list_del_init(&clp->cl_strhash);
list_del_init(&clp->cl_idhash);
list_add(&clp->cl_idhash, &conf_id_hashtbl[idhashval]);
strhashval = clientstr_hashval(clp->cl_name.data,
clp->cl_name.len);
list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]);
renew_client(clp);
}
/*
* RFC 3010 has a complex implmentation description of processing a
* SETCLIENTID request consisting of 5 bullets, labeled as
* CASE0 - CASE4 below.
*
* NOTES:
* callback information will be processed in a future patch
*
* an unconfirmed record is added when:
* NORMAL (part of CASE 4): there is no confirmed nor unconfirmed record.
* CASE 1: confirmed record found with matching name, principal,
* verifier, and clientid.
* CASE 2: confirmed record found with matching name, principal,
* and there is no unconfirmed record with matching
* name and principal
*
* an unconfirmed record is replaced when:
* CASE 3: confirmed record found with matching name, principal,
* and an unconfirmed record is found with matching
* name, principal, and with clientid and
* confirm that does not match the confirmed record.
* CASE 4: there is no confirmed record with matching name and
* principal. there is an unconfirmed record with
* matching name, principal.
*
* an unconfirmed record is deleted when:
* CASE 1: an unconfirmed record that matches input name, verifier,
* and confirmed clientid.
* CASE 4: any unconfirmed records with matching name and principal
* that exist after an unconfirmed record has been replaced
* as described above.
*
*/
int
nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_setclientid *setclid)
{
u32 ip_addr = rqstp->rq_addr.sin_addr.s_addr;
struct xdr_netobj clname = {
.len = setclid->se_namelen,
.data = setclid->se_name,
};
nfs4_verifier clverifier = setclid->se_verf;
unsigned int strhashval;
struct nfs4_client * conf, * unconf, * new, * clp;
int status;
struct list_head *pos, *next;
status = nfserr_inval;
if (!check_name(clname))
goto out;
/*
* XXX The Duplicate Request Cache (DRC) has been checked (??)
* We get here on a DRC miss.
*/
strhashval = clientstr_hashval(clname.data, clname.len);
conf = NULL;
nfs4_lock_state();
list_for_each_safe(pos, next, &conf_str_hashtbl[strhashval]) {
clp = list_entry(pos, struct nfs4_client, cl_strhash);
if (!cmp_name(&clp->cl_name, &clname))
continue;
/*
* CASE 0:
* clname match, confirmed, different principal
* or different ip_address
*/
status = nfserr_clid_inuse;
if (!cmp_creds(&clp->cl_cred,&rqstp->rq_cred)) {
printk("NFSD: setclientid: string in use by client"
"(clientid %08x/%08x)\n",
clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
goto out;
}
if (clp->cl_addr != ip_addr) {
printk("NFSD: setclientid: string in use by client"
"(clientid %08x/%08x)\n",
clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
goto out;
}
/*
* cl_name match from a previous SETCLIENTID operation
* XXX check for additional matches?
*/
conf = clp;
break;
}
unconf = NULL;
list_for_each_safe(pos, next, &unconf_str_hashtbl[strhashval]) {
clp = list_entry(pos, struct nfs4_client, cl_strhash);
if (!cmp_name(&clp->cl_name, &clname))
continue;
/* cl_name match from a previous SETCLIENTID operation */
unconf = clp;
break;
}
status = nfserr_resource;
if (!conf) {
/*
* CASE 4:
* placed first, because it is the normal case.
*/
if (unconf)
expire_client(unconf);
if (!(new = create_client(clname)))
goto out;
copy_verf(new, &clverifier);
new->cl_addr = ip_addr;
copy_cred(&new->cl_cred,&rqstp->rq_cred);
gen_clid(new);
gen_confirm(new);
add_to_unconfirmed(new, strhashval);
} else if (cmp_verf(&conf->cl_verifier, &clverifier)) {
/*
* CASE 1:
* cl_name match, confirmed, principal match
* verifier match: probable callback update
*
* remove any unconfirmed nfs4_client with
* matching cl_name, cl_verifier, and cl_clientid
*
* create and insert an unconfirmed nfs4_client with same
* cl_name, cl_verifier, and cl_clientid as existing
* nfs4_client, but with the new callback info and a
* new cl_confirm
*/
if ((unconf) &&
cmp_verf(&unconf->cl_verifier, &conf->cl_verifier) &&
cmp_clid(&unconf->cl_clientid, &conf->cl_clientid)) {
expire_client(unconf);
}
if (!(new = create_client(clname)))
goto out;
copy_verf(new,&conf->cl_verifier);
new->cl_addr = ip_addr;
copy_cred(&new->cl_cred,&rqstp->rq_cred);
copy_clid(new, conf);
gen_confirm(new);
add_to_unconfirmed(new,strhashval);
} else if (!unconf) {
/*
* CASE 2:
* clname match, confirmed, principal match
* verfier does not match
* no unconfirmed. create a new unconfirmed nfs4_client
* using input clverifier, clname, and callback info
* and generate a new cl_clientid and cl_confirm.
*/
if (!(new = create_client(clname)))
goto out;
copy_verf(new,&clverifier);
new->cl_addr = ip_addr;
copy_cred(&new->cl_cred,&rqstp->rq_cred);
gen_clid(new);
gen_confirm(new);
add_to_unconfirmed(new, strhashval);
} else if (!cmp_clid(&conf->cl_clientid, &unconf->cl_clientid) &&
!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm)) {
/*
* CASE3:
* confirmed found (name, principal match)
* confirmed verifier does not match input clverifier
*
* unconfirmed found (name match)
* confirmed->cl_clientid != unconfirmed->cl_clientid and
* confirmed->cl_confirm != unconfirmed->cl_confirm
*
* remove unconfirmed.
*
* create an unconfirmed nfs4_client
* with same cl_name as existing confirmed nfs4_client,
* but with new callback info, new cl_clientid,
* new cl_verifier and a new cl_confirm
*/
expire_client(unconf);
if (!(new = create_client(clname)))
goto out;
copy_verf(new,&clverifier);
new->cl_addr = ip_addr;
copy_cred(&new->cl_cred,&rqstp->rq_cred);
gen_clid(new);
gen_confirm(new);
add_to_unconfirmed(new, strhashval);
} else {
/* No cases hit !!! */
status = nfserr_inval;
goto out;
}
setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot;
setclid->se_clientid.cl_id = new->cl_clientid.cl_id;
memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data));
printk(KERN_INFO "NFSD: this client will not receive delegations\n");
status = nfs_ok;
out:
nfs4_unlock_state();
return status;
}
/*
* RFC 3010 has a complex implmentation description of processing a
* SETCLIENTID_CONFIRM request consisting of 4 bullets describing
* processing on a DRC miss, labeled as CASE1 - CASE4 below.
*
* NOTE: callback information will be processed here in a future patch
*/
int
nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confirm *setclientid_confirm)
{
u32 ip_addr = rqstp->rq_addr.sin_addr.s_addr;
unsigned int idhashval;
struct nfs4_client *clp, *conf = NULL, *unconf = NULL;
nfs4_verifier confirm = setclientid_confirm->sc_confirm;
clientid_t * clid = &setclientid_confirm->sc_clientid;
struct list_head *pos, *next;
int status;
status = nfserr_stale_clientid;
if (STALE_CLIENTID(clid))
goto out;
/*
* XXX The Duplicate Request Cache (DRC) has been checked (??)
* We get here on a DRC miss.
*/
idhashval = clientid_hashval(clid->cl_id);
nfs4_lock_state();
list_for_each_safe(pos, next, &conf_id_hashtbl[idhashval]) {
clp = list_entry(pos, struct nfs4_client, cl_idhash);
if (!cmp_clid(&clp->cl_clientid, clid))
continue;
status = nfserr_inval;
/*
* Found a record for this clientid. If the IP addresses
* don't match, return ERR_INVAL just as if the record had
* not been found.
*/
if (clp->cl_addr != ip_addr) {
printk("NFSD: setclientid: string in use by client"
"(clientid %08x/%08x)\n",
clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
goto out;
}
conf = clp;
break;
}
list_for_each_safe(pos, next, &unconf_id_hashtbl[idhashval]) {
clp = list_entry(pos, struct nfs4_client, cl_idhash);
if (!cmp_clid(&clp->cl_clientid, clid))
continue;
status = nfserr_inval;
if (clp->cl_addr != ip_addr) {
printk("NFSD: setclientid: string in use by client"
"(clientid %08x/%08x)\n",
clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
goto out;
}
unconf = clp;
break;
}
/* CASE 1:
* unconf record that matches input clientid and input confirm.
* conf record that matches input clientid.
* conf and unconf records match names, verifiers
*/
if ((conf && unconf) &&
(cmp_verf(&unconf->cl_confirm, &confirm)) &&
(cmp_verf(&conf->cl_verifier, &unconf->cl_verifier)) &&
(cmp_name(&conf->cl_name,&unconf->cl_name)) &&
(!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm))) {
if (!cmp_creds(&conf->cl_cred, &unconf->cl_cred))
status = nfserr_clid_inuse;
else {
expire_client(conf);
move_to_confirmed(unconf, idhashval);
status = nfs_ok;
}
goto out;
}
/* CASE 2:
* conf record that matches input clientid.
* if unconf record that matches input clientid, then unconf->cl_name
* or unconf->cl_verifier don't match the conf record.
*/
if ((conf && !unconf) ||
((conf && unconf) &&
(!cmp_verf(&conf->cl_verifier, &unconf->cl_verifier) ||
!cmp_name(&conf->cl_name, &unconf->cl_name)))) {
if (!cmp_creds(&conf->cl_cred,&rqstp->rq_cred)) {
status = nfserr_clid_inuse;
} else {
status = nfs_ok;
}
goto out;
}
/* CASE 3:
* conf record not found.
* unconf record found.
* unconf->cl_confirm matches input confirm
*/
if (!conf && unconf && cmp_verf(&unconf->cl_confirm, &confirm)) {
if (!cmp_creds(&unconf->cl_cred, &rqstp->rq_cred)) {
status = nfserr_clid_inuse;
} else {
status = nfs_ok;
move_to_confirmed(unconf, idhashval);
}
goto out;
}
/* CASE 4:
* conf record not found, or if conf, then conf->cl_confirm does not
* match input confirm.
* unconf record not found, or if unconf, then unconf->cl_confirm
* does not match input confirm.
*/
if ((!conf || (conf && !cmp_verf(&conf->cl_confirm, &confirm))) &&
(!unconf || (unconf && !cmp_verf(&unconf->cl_confirm, &confirm)))) {
status = nfserr_stale_clientid;
goto out;
}
/* check that we have hit one of the cases...*/
status = nfserr_inval;
goto out;
out:
/* XXX if status == nfs_ok, probe callback path */
nfs4_unlock_state();
return status;
}
/*
* Open owner state (share locks)
*/
/* hash tables for nfs4_stateowner */
#define OWNER_HASH_BITS 8
#define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
#define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
#define ownerid_hashval(id) \
((id) & OWNER_HASH_MASK)
#define ownerstr_hashval(clientid, ownername) \
(((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK)
static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE];
static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE];
/* hash table for nfs4_file */
#define FILE_HASH_BITS 8
#define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
#define FILE_HASH_MASK (FILE_HASH_SIZE - 1)
/* hash table for (open)nfs4_stateid */
#define STATEID_HASH_BITS 10
#define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS)
#define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1)
#define file_hashval(x) \
hash_ptr(x, FILE_HASH_BITS)
#define stateid_hashval(owner_id, file_id) \
(((owner_id) + (file_id)) & STATEID_HASH_MASK)
static struct list_head file_hashtbl[FILE_HASH_SIZE];
static struct list_head stateid_hashtbl[STATEID_HASH_SIZE];
/* OPEN Share state helper functions */
static inline struct nfs4_file *
alloc_init_file(unsigned int hashval, struct inode *ino) {
struct nfs4_file *fp;
if ((fp = kmalloc(sizeof(struct nfs4_file),GFP_KERNEL))) {
INIT_LIST_HEAD(&fp->fi_hash);
INIT_LIST_HEAD(&fp->fi_perfile);
list_add(&fp->fi_hash, &file_hashtbl[hashval]);
fp->fi_inode = igrab(ino);
fp->fi_id = current_fileid++;
alloc_file++;
return fp;
}
return (struct nfs4_file *)NULL;
}
static void
release_all_files(void)
{
int i;
struct nfs4_file *fp;
for (i=0;i<FILE_HASH_SIZE;i++) {
while (!list_empty(&file_hashtbl[i])) {
fp = list_entry(file_hashtbl[i].next, struct nfs4_file, fi_hash);
/* this should never be more than once... */
if(!list_empty(&fp->fi_perfile)) {
printk("ERROR: release_all_files: file %p is open, creating dangling state !!!\n",fp);
}
release_file(fp);
}
}
}
static inline struct nfs4_stateowner *
alloc_stateowner(struct xdr_netobj *owner)
{
struct nfs4_stateowner *sop;
if ((sop = kmalloc(sizeof(struct nfs4_stateowner),GFP_KERNEL))) {
if((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) {
memcpy(sop->so_owner.data, owner->data, owner->len);
sop->so_owner.len = owner->len;
return sop;
}
kfree(sop);
}
return (struct nfs4_stateowner *)NULL;
}
/* should use a slab cache */
static void
free_stateowner(struct nfs4_stateowner *sop) {
if(sop) {
kfree(sop->so_owner.data);
kfree(sop);
sop = NULL;
free_sowner++;
}
}
static struct nfs4_stateowner *
alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) {
struct nfs4_stateowner *sop;
struct nfs4_replay *rp;
unsigned int idhashval;
if (!(sop = alloc_stateowner(&open->op_owner)))
return (struct nfs4_stateowner *)NULL;
idhashval = ownerid_hashval(current_ownerid);
INIT_LIST_HEAD(&sop->so_idhash);
INIT_LIST_HEAD(&sop->so_strhash);
INIT_LIST_HEAD(&sop->so_perclient);
INIT_LIST_HEAD(&sop->so_perfilestate);
INIT_LIST_HEAD(&sop->so_perlockowner); /* not used */
list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]);
list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]);
list_add(&sop->so_perclient, &clp->cl_perclient);
add_perclient++;
sop->so_is_open_owner = 1;
sop->so_id = current_ownerid++;
sop->so_client = clp;
sop->so_seqid = open->op_seqid;
sop->so_confirmed = 0;
rp = &sop->so_replay;
rp->rp_status = NFSERR_SERVERFAULT;
rp->rp_buflen = 0;
rp->rp_buf = rp->rp_ibuf;
alloc_sowner++;
return sop;
}
static void
release_stateid_lockowner(struct nfs4_stateid *open_stp)
{
struct nfs4_stateowner *lock_sop;
while (!list_empty(&open_stp->st_perlockowner)) {
lock_sop = list_entry(open_stp->st_perlockowner.next,
struct nfs4_stateowner, so_perlockowner);
/* list_del(&open_stp->st_perlockowner); */
BUG_ON(lock_sop->so_is_open_owner);
release_stateowner(lock_sop);
}
}
static void
release_stateowner(struct nfs4_stateowner *sop)
{
struct nfs4_stateid *stp;
list_del(&sop->so_idhash);
list_del(&sop->so_strhash);
list_del(&sop->so_perclient);
list_del(&sop->so_perlockowner);
del_perclient++;
while (!list_empty(&sop->so_perfilestate)) {
stp = list_entry(sop->so_perfilestate.next,
struct nfs4_stateid, st_perfilestate);
if(sop->so_is_open_owner)
release_stateid(stp, OPEN_STATE);
else
release_stateid(stp, LOCK_STATE);
}
free_stateowner(sop);
}
static inline void
init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfs4_stateowner *sop, struct nfsd4_open *open) {
unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id);
INIT_LIST_HEAD(&stp->st_hash);
INIT_LIST_HEAD(&stp->st_perfilestate);
INIT_LIST_HEAD(&stp->st_perlockowner);
INIT_LIST_HEAD(&stp->st_perfile);
list_add(&stp->st_hash, &stateid_hashtbl[hashval]);
list_add(&stp->st_perfilestate, &sop->so_perfilestate);
list_add_perfile++;
list_add(&stp->st_perfile, &fp->fi_perfile);
stp->st_stateowner = sop;
stp->st_file = fp;
stp->st_stateid.si_boot = boot_time;
stp->st_stateid.si_stateownerid = sop->so_id;
stp->st_stateid.si_fileid = fp->fi_id;
stp->st_stateid.si_generation = 0;
stp->st_access_bmap = 0;
stp->st_deny_bmap = 0;
__set_bit(open->op_share_access, &stp->st_access_bmap);
__set_bit(open->op_share_deny, &stp->st_deny_bmap);
}
static void
release_stateid(struct nfs4_stateid *stp, int flags) {
list_del(&stp->st_hash);
list_del_perfile++;
list_del(&stp->st_perfile);
list_del(&stp->st_perfilestate);
if((stp->st_vfs_set) && (flags & OPEN_STATE)) {
release_stateid_lockowner(stp);
nfsd_close(&stp->st_vfs_file);
vfsclose++;
dput(stp->st_vfs_file.f_dentry);
mntput(stp->st_vfs_file.f_vfsmnt);
} else if ((stp->st_vfs_set) && (flags & LOCK_STATE)) {
struct file *filp = &stp->st_vfs_file;
locks_remove_posix(filp, (fl_owner_t) stp->st_stateowner);
}
kfree(stp);
stp = NULL;
}
static void
release_file(struct nfs4_file *fp)
{
free_file++;
list_del(&fp->fi_hash);
iput(fp->fi_inode);
kfree(fp);
}
void
release_state_owner(struct nfs4_stateid *stp, struct nfs4_stateowner **sopp,
int flag)
{
struct nfs4_stateowner *sop = stp->st_stateowner;
struct nfs4_file *fp = stp->st_file;
dprintk("NFSD: release_state_owner\n");
release_stateid(stp, flag);
/*
* release unused nfs4_stateowners.
* XXX will need to be placed on an open_stateid_lru list to be
* released by the laundromat service after the lease period
* to enable us to handle CLOSE replay
*/
if (sop->so_confirmed && list_empty(&sop->so_perfilestate)) {
release_stateowner(sop);
*sopp = NULL;
}
/* unused nfs4_file's are releseed. XXX slab cache? */
if (list_empty(&fp->fi_perfile)) {
release_file(fp);
}
}
static int
cmp_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, clientid_t *clid) {
return ((sop->so_owner.len == owner->len) &&
!memcmp(sop->so_owner.data, owner->data, owner->len) &&
(sop->so_client->cl_clientid.cl_id == clid->cl_id));
}
/* search ownerstr_hashtbl[] for owner */
static int
find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, struct nfs4_stateowner **op) {
struct list_head *pos, *next;
struct nfs4_stateowner *local = NULL;
list_for_each_safe(pos, next, &ownerstr_hashtbl[hashval]) {
local = list_entry(pos, struct nfs4_stateowner, so_strhash);
if(!cmp_owner_str(local, &open->op_owner, &open->op_clientid))
continue;
*op = local;
return(1);
}
return 0;
}
/* see if clientid is in confirmed hash table */
static int
verify_clientid(struct nfs4_client **client, clientid_t *clid) {
struct list_head *pos, *next;
struct nfs4_client *clp;
unsigned int idhashval = clientid_hashval(clid->cl_id);
list_for_each_safe(pos, next, &conf_id_hashtbl[idhashval]) {
clp = list_entry(pos, struct nfs4_client, cl_idhash);
if (!cmp_clid(&clp->cl_clientid, clid))
continue;
*client = clp;
return 1;
}
*client = NULL;
return 0;
}
/* search file_hashtbl[] for file */
static int
find_file(unsigned int hashval, struct inode *ino, struct nfs4_file **fp) {
struct list_head *pos, *next;
struct nfs4_file *local = NULL;
list_for_each_safe(pos, next, &file_hashtbl[hashval]) {
local = list_entry(pos, struct nfs4_file, fi_hash);
if (local->fi_inode == ino) {
*fp = local;
return(1);
}
}
return 0;
}
#define TEST_ACCESS(x) ((x > 0 || x < 4)?1:0)
#define TEST_DENY(x) ((x >= 0 || x < 5)?1:0)
void
set_access(unsigned int *access, unsigned long bmap) {
int i;
*access = 0;
for (i = 1; i < 4; i++) {
if(test_bit(i, &bmap))
*access |= i;
}
}
void
set_deny(unsigned int *deny, unsigned long bmap) {
int i;
*deny = 0;
for (i = 0; i < 4; i++) {
if(test_bit(i, &bmap))
*deny |= i ;
}
}
static int
test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) {
unsigned int access, deny;
set_access(&access, stp->st_access_bmap);
set_deny(&deny, stp->st_deny_bmap);
if ((access & open->op_share_deny) || (deny & open->op_share_access))
return 0;
return 1;
}
/*
* Called to check deny when READ with all zero stateid or
* WRITE with all zero or all one stateid
*/
int
nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type)
{
struct inode *ino = current_fh->fh_dentry->d_inode;
unsigned int fi_hashval;
struct nfs4_file *fp;
struct nfs4_stateid *stp;
struct list_head *pos, *next;
dprintk("NFSD: nfs4_share_conflict\n");
fi_hashval = file_hashval(ino);
if (find_file(fi_hashval, ino, &fp)) {
/* Search for conflicting share reservations */
list_for_each_safe(pos, next, &fp->fi_perfile) {
stp = list_entry(pos, struct nfs4_stateid, st_perfile);
if (test_bit(deny_type, &stp->st_deny_bmap) ||
test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap))
return nfserr_share_denied;
}
}
return nfs_ok;
}
static inline int
nfs4_file_upgrade(struct file *filp, unsigned int share_access)
{
int status;
if (share_access & NFS4_SHARE_ACCESS_WRITE) {
status = get_write_access(filp->f_dentry->d_inode);
if (!status)
filp->f_mode = FMODE_WRITE;
else
return nfserrno(status);
}
return nfs_ok;
}
static inline void
nfs4_file_downgrade(struct file *filp, unsigned int share_access)
{
if (share_access & NFS4_SHARE_ACCESS_WRITE) {
put_write_access(filp->f_dentry->d_inode);
filp->f_mode = FMODE_READ;
}
}
/*
* nfsd4_process_open1()
* lookup stateowner.
* found:
* check confirmed
* confirmed:
* check seqid
* not confirmed:
* delete owner
* create new owner
* notfound:
* verify clientid
* create new owner
*/
int
nfsd4_process_open1(struct nfsd4_open *open)
{
int status;
clientid_t *clientid = &open->op_clientid;
struct nfs4_client *clp = NULL;
unsigned int strhashval;
struct nfs4_stateowner *sop = NULL;
status = nfserr_inval;
if (!check_name(open->op_owner))
goto out;
status = nfserr_stale_clientid;
if (STALE_CLIENTID(&open->op_clientid))
goto out;
nfs4_lock_state();
strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner);
if (find_openstateowner_str(strhashval, open, &sop)) {
open->op_stateowner = sop;
/* check for replay */
if (open->op_seqid == sop->so_seqid){
if (!sop->so_replay.rp_buflen) {
/*
* The original OPEN failed in so spectacularly that we
* don't even have replay data saved! Therefore, we
* have no choice but to continue processing
* this OPEN; presumably, we'll fail again for the same
* reason.
*/
dprintk("nfsd4_process_open1: replay with no replay cache\n");
status = NFS_OK;
goto renew;
}
/* replay: indicate to calling function */
status = NFSERR_REPLAY_ME;
goto out;
}
if (sop->so_confirmed) {
if (open->op_seqid == sop->so_seqid + 1) {
status = nfs_ok;
goto renew;
}
status = nfserr_bad_seqid;
goto out;
}
/* If we get here, we received and OPEN for an unconfirmed
* nfs4_stateowner.
* Since the sequid's are different, purge the
* existing nfs4_stateowner, and instantiate a new one.
*/
clp = sop->so_client;
release_stateowner(sop);
goto instantiate_new_owner;
}
/* nfs4_stateowner not found.
* verify clientid and instantiate new nfs4_stateowner
* if verify fails this is presumably the result of the
* client's lease expiring.
*
* XXX compare clp->cl_addr with rqstp addr?
*/
status = nfserr_expired;
if (!verify_clientid(&clp, clientid))
goto out;
instantiate_new_owner:
status = nfserr_resource;
if (!(sop = alloc_init_open_stateowner(strhashval, clp, open)))
goto out;
open->op_stateowner = sop;
status = nfs_ok;
renew:
renew_client(sop->so_client);
out:
nfs4_unlock_state();
return status;
}
int
nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
{
struct iattr iattr;
struct nfs4_stateowner *sop = open->op_stateowner;
struct nfs4_file *fp;
struct inode *ino;
unsigned int fi_hashval;
struct list_head *pos, *next;
struct nfs4_stateid *stq, *stp = NULL;
int status;
status = nfserr_resource;
if (!sop)
goto out;
ino = current_fh->fh_dentry->d_inode;
status = nfserr_inval;
if (!TEST_ACCESS(open->op_share_access) || !TEST_DENY(open->op_share_deny))
goto out;
nfs4_lock_state();
fi_hashval = file_hashval(ino);
if (find_file(fi_hashval, ino, &fp)) {
/* Search for conflicting share reservations */
status = nfserr_share_denied;
list_for_each_safe(pos, next, &fp->fi_perfile) {
stq = list_entry(pos, struct nfs4_stateid, st_perfile);
if(stq->st_stateowner == sop) {
stp = stq;
continue;
}
/* ignore lock owners */
if (stq->st_stateowner->so_is_open_owner == 0)
continue;
if (!test_share(stq,open))
goto out;
}
} else {
/* No nfs4_file found; allocate and init a new one */
status = nfserr_resource;
if ((fp = alloc_init_file(fi_hashval, ino)) == NULL)
goto out;
}
if (!stp) {
int flags = 0;
status = nfserr_resource;
if ((stp = kmalloc(sizeof(struct nfs4_stateid),
GFP_KERNEL)) == NULL)
goto out;
if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
flags = MAY_WRITE;
else
flags = MAY_READ;
if ((status = nfsd_open(rqstp, current_fh, S_IFREG,
flags,
&stp->st_vfs_file)) != 0)
goto out_free;
vfsopen++;
dget(stp->st_vfs_file.f_dentry);
mntget(stp->st_vfs_file.f_vfsmnt);
init_stateid(stp, fp, sop, open);
stp->st_vfs_set = 1;
} else {
/* This is an upgrade of an existing OPEN.
* OR the incoming share with the existing
* nfs4_stateid share */
unsigned int share_access;
set_access(&share_access, stp->st_access_bmap);
share_access = ~share_access;
share_access &= open->op_share_access;
/* update the struct file */
if ((status = nfs4_file_upgrade(&stp->st_vfs_file, share_access)))
goto out;
/* remember the open */
set_bit(open->op_share_access, &stp->st_access_bmap);
set_bit(open->op_share_deny, &stp->st_deny_bmap);
/* bump the stateid */
update_stateid(&stp->st_stateid);
}
dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n\n",
stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid,
stp->st_stateid.si_fileid, stp->st_stateid.si_generation);
if (open->op_truncate) {
iattr.ia_valid = ATTR_SIZE;
iattr.ia_size = 0;
status = nfsd_setattr(rqstp, current_fh, &iattr, 0, (time_t)0);
if (status)
goto out;
}
memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t));
open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE;
status = nfs_ok;
out:
if (fp && list_empty(&fp->fi_perfile))
release_file(fp);
/*
* To finish the open response, we just need to set the rflags.
*/
open->op_rflags = 0;
if (!open->op_stateowner->so_confirmed)
open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM;
nfs4_unlock_state();
return status;
out_free:
kfree(stp);
goto out;
}
static struct work_struct laundromat_work;
static void laundromat_main(void *);
static DECLARE_WORK(laundromat_work, laundromat_main, NULL);
int
nfsd4_renew(clientid_t *clid)
{
struct nfs4_client *clp;
struct list_head *pos, *next;
unsigned int idhashval;
int status;
nfs4_lock_state();
dprintk("process_renew(%08x/%08x): starting\n",
clid->cl_boot, clid->cl_id);
status = nfserr_stale_clientid;
if (STALE_CLIENTID(clid))
goto out;
status = nfs_ok;
idhashval = clientid_hashval(clid->cl_id);
list_for_each_safe(pos, next, &conf_id_hashtbl[idhashval]) {
clp = list_entry(pos, struct nfs4_client, cl_idhash);
if (!cmp_clid(&clp->cl_clientid, clid))
continue;
renew_client(clp);
goto out;
}
list_for_each_safe(pos, next, &unconf_id_hashtbl[idhashval]) {
clp = list_entry(pos, struct nfs4_client, cl_idhash);
if (!cmp_clid(&clp->cl_clientid, clid))
continue;
renew_client(clp);
goto out;
}
/*
* Couldn't find an nfs4_client for this clientid.
* Presumably this is because the client took too long to
* RENEW, so return NFS4ERR_EXPIRED.
*/
dprintk("nfsd4_renew: clientid not found!\n");
status = nfserr_expired;
out:
nfs4_unlock_state();
return status;
}
time_t
nfs4_laundromat(void)
{
struct nfs4_client *clp;
struct list_head *pos, *next;
time_t cutoff = get_seconds() - NFSD_LEASE_TIME;
time_t t, return_val = NFSD_LEASE_TIME;
nfs4_lock_state();
dprintk("NFSD: laundromat service - starting, examining clients\n");
list_for_each_safe(pos, next, &client_lru) {
clp = list_entry(pos, struct nfs4_client, cl_lru);
if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) {
t = clp->cl_time - cutoff;
if (return_val > t)
return_val = t;
break;
}
dprintk("NFSD: purging unused client (clientid %08x)\n",
clp->cl_clientid.cl_id);
expire_client(clp);
}
if (return_val < NFSD_LAUNDROMAT_MINTIMEOUT)
return_val = NFSD_LAUNDROMAT_MINTIMEOUT;
nfs4_unlock_state();
return return_val;
}
void
laundromat_main(void *not_used)
{
time_t t;
t = nfs4_laundromat();
dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t);
schedule_delayed_work(&laundromat_work, t*HZ);
}
/* search ownerid_hashtbl[] for stateid owner (stateid->si_stateownerid) */
struct nfs4_stateowner *
find_openstateowner_id(u32 st_id) {
struct list_head *pos, *next;
struct nfs4_stateowner *local = NULL;
unsigned int hashval = ownerid_hashval(st_id);
list_for_each_safe(pos, next, &ownerid_hashtbl[hashval]) {
local = list_entry(pos, struct nfs4_stateowner, so_idhash);
if(local->so_id == st_id)
return local;
}
return NULL;
}
static inline int
nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp)
{
return (stp->st_vfs_set == 0 ||
fhp->fh_dentry->d_inode != stp->st_vfs_file.f_dentry->d_inode);
}
static int
STALE_STATEID(stateid_t *stateid)
{
if (stateid->si_boot == boot_time)
return 0;
printk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n",
stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid,
stateid->si_generation);
return 1;
}
/*
* Checks for stateid operations
*/
int
nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct nfs4_stateid **stpp)
{
struct nfs4_stateid *stp;
int status;
dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n",
stateid->si_boot, stateid->si_stateownerid,
stateid->si_fileid, stateid->si_generation);
*stpp = NULL;
/* STALE STATEID */
status = nfserr_stale_stateid;
if (STALE_STATEID(stateid))
goto out;
/* BAD STATEID */
status = nfserr_bad_stateid;
if (!(stp = find_stateid(stateid, flags))) {
dprintk("NFSD: preprocess_stateid_op: no open stateid!\n");
goto out;
}
if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) {
dprintk("NFSD: preprocess_stateid_op: fh-stateid mismatch!\n");
stp->st_vfs_set = 0;
goto out;
}
if (!stp->st_stateowner->so_confirmed) {
dprintk("preprocess_stateid_op: lockowner not confirmed yet!\n");
goto out;
}
if (stateid->si_generation > stp->st_stateid.si_generation) {
dprintk("preprocess_stateid_op: future stateid?!\n");
goto out;
}
/* OLD STATEID */
status = nfserr_old_stateid;
if (stateid->si_generation < stp->st_stateid.si_generation) {
dprintk("preprocess_stateid_op: old stateid!\n");
goto out;
}
*stpp = stp;
status = nfs_ok;
renew_client(stp->st_stateowner->so_client);
out:
return status;
}
/*
* Checks for sequence id mutating operations.
*/
int
nfs4_preprocess_seqid_op(struct svc_fh *current_fh, u32 seqid, stateid_t *stateid, int flags, struct nfs4_stateowner **sopp, struct nfs4_stateid **stpp, clientid_t *lockclid)
{
int status;
struct nfs4_stateid *stp;
struct nfs4_stateowner *sop;
dprintk("NFSD: preprocess_seqid_op: seqid=%d "
"stateid = (%08x/%08x/%08x/%08x)\n", seqid,
stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid,
stateid->si_generation);
*stpp = NULL;
*sopp = NULL;
status = nfserr_bad_stateid;
if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) {
printk("NFSD: preprocess_seqid_op: magic stateid!\n");
goto out;
}
status = nfserr_stale_stateid;
if (STALE_STATEID(stateid))
goto out;
/*
* We return BAD_STATEID if filehandle doesn't match stateid,
* the confirmed flag is incorrecly set, or the generation
* number is incorrect.
* If there is no entry in the openfile table for this id,
* we can't always return BAD_STATEID;
* this might be a retransmitted CLOSE which has arrived after
* the openfile has been released.
*/
if (!(stp = find_stateid(stateid, flags)))
goto no_nfs4_stateid;
status = nfserr_bad_stateid;
/* for new lock stateowners, check that the lock->v.new.open_stateid
* refers to an open stateowner, and that the lockclid
* (nfs4_lock->v.new.clientid) is the same as the
* open_stateid->st_stateowner->so_client->clientid
*/
if (lockclid) {
struct nfs4_stateowner *sop = stp->st_stateowner;
struct nfs4_client *clp = sop->so_client;
if (!sop->so_is_open_owner)
goto out;
if (!cmp_clid(&clp->cl_clientid, lockclid))
goto out;
}
if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) {
printk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n");
stp->st_vfs_set = 0;
goto out;
}
*stpp = stp;
*sopp = sop = stp->st_stateowner;
/*
* We now validate the seqid and stateid generation numbers.
* For the moment, we ignore the possibility of
* generation number wraparound.
*/
if (seqid != sop->so_seqid + 1)
goto check_replay;
if (sop->so_confirmed) {
if (flags & CONFIRM) {
printk("NFSD: preprocess_seqid_op: expected unconfirmed stateowner!\n");
goto out;
}
}
else {
if (!(flags & CONFIRM)) {
printk("NFSD: preprocess_seqid_op: stateowner not confirmed yet!\n");
goto out;
}
}
if (stateid->si_generation > stp->st_stateid.si_generation) {
printk("NFSD: preprocess_seqid_op: future stateid?!\n");
goto out;
}
status = nfserr_old_stateid;
if (stateid->si_generation < stp->st_stateid.si_generation) {
printk("NFSD: preprocess_seqid_op: old stateid!\n");
goto out;
}
/* XXX renew the client lease here */
status = nfs_ok;
out:
return status;
no_nfs4_stateid:
/*
* We determine whether this is a bad stateid or a replay,
* starting by trying to look up the stateowner.
* If stateowner is not found - stateid is bad.
*/
if (!(sop = find_openstateowner_id(stateid->si_stateownerid))) {
printk("NFSD: preprocess_seqid_op: no stateowner or nfs4_stateid!\n");
status = nfserr_bad_stateid;
goto out;
}
check_replay:
if (seqid == sop->so_seqid) {
printk("NFSD: preprocess_seqid_op: retransmission?\n");
/* indicate replay to calling function */
status = NFSERR_REPLAY_ME;
} else {
printk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d\n", sop->so_seqid +1, seqid);
status = nfserr_bad_seqid;
}
goto out;
}
int
nfsd4_open_confirm(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_confirm *oc)
{
int status;
struct nfs4_stateowner *sop;
struct nfs4_stateid *stp;
dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
(int)current_fh->fh_dentry->d_name.len,
current_fh->fh_dentry->d_name.name);
if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0)))
goto out;
oc->oc_stateowner = NULL;
nfs4_lock_state();
if ((status = nfs4_preprocess_seqid_op(current_fh, oc->oc_seqid,
&oc->oc_req_stateid,
CHECK_FH | CONFIRM | OPEN_STATE,
&oc->oc_stateowner, &stp, NULL)))
goto out;
sop = oc->oc_stateowner;
sop->so_confirmed = 1;
update_stateid(&stp->st_stateid);
memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t));
dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d "
"stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid,
stp->st_stateid.si_boot,
stp->st_stateid.si_stateownerid,
stp->st_stateid.si_fileid,
stp->st_stateid.si_generation);
status = nfs_ok;
out:
nfs4_unlock_state();
return status;
}
/*
* unset all bits in union bitmap (bmap) that
* do not exist in share (from successful OPEN_DOWNGRADE)
*/
static void
reset_union_bmap_access(unsigned long access, unsigned long *bmap)
{
int i;
for (i = 1; i < 4; i++) {
if ((i & access) != i)
__clear_bit(i, bmap);
}
}
static void
reset_union_bmap_deny(unsigned long deny, unsigned long *bmap)
{
int i;
for (i = 0; i < 4; i++) {
if ((i & deny) != i)
__clear_bit(i, bmap);
}
}
int
nfsd4_open_downgrade(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_downgrade *od)
{
int status;
struct nfs4_stateid *stp;
unsigned int share_access;
dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
(int)current_fh->fh_dentry->d_name.len,
current_fh->fh_dentry->d_name.name);
status = nfserr_inval;
if (!TEST_ACCESS(od->od_share_access) || !TEST_DENY(od->od_share_deny))
goto out;
nfs4_lock_state();
if ((status = nfs4_preprocess_seqid_op(current_fh, od->od_seqid,
&od->od_stateid,
CHECK_FH | OPEN_STATE,
&od->od_stateowner, &stp, NULL)))
goto out;
status = nfserr_inval;
if (!test_bit(od->od_share_access, &stp->st_access_bmap)) {
dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n",
stp->st_access_bmap, od->od_share_access);
goto out;
}
if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) {
dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
stp->st_deny_bmap, od->od_share_deny);
goto out;
}
set_access(&share_access, stp->st_access_bmap);
nfs4_file_downgrade(&stp->st_vfs_file,
share_access & ~od->od_share_access);
reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap);
reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap);
update_stateid(&stp->st_stateid);
memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t));
status = nfs_ok;
out:
nfs4_unlock_state();
return status;
}
int
nfsd4_close(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_close *close)
{
int status;
struct nfs4_stateid *stp;
dprintk("NFSD: nfsd4_close on file %.*s\n",
(int)current_fh->fh_dentry->d_name.len,
current_fh->fh_dentry->d_name.name);
nfs4_lock_state();
if ((status = nfs4_preprocess_seqid_op(current_fh, close->cl_seqid,
&close->cl_stateid,
CHECK_FH | OPEN_STATE,
&close->cl_stateowner, &stp, NULL)))
goto out;
/*
* Return success, but first update the stateid.
*/
status = nfs_ok;
update_stateid(&stp->st_stateid);
memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t));
/* release_state_owner() calls nfsd_close() if needed */
release_state_owner(stp, &close->cl_stateowner, OPEN_STATE);
out:
nfs4_unlock_state();
return status;
}
/*
* Lock owner state (byte-range locks)
*/
#define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
#define LOCK_HASH_BITS 8
#define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS)
#define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1)
#define lockownerid_hashval(id) \
((id) & LOCK_HASH_MASK)
#define lock_ownerstr_hashval(x, clientid, ownername) \
((file_hashval(x) + (clientid) + opaque_hashval((ownername.data), (ownername.len))) & LOCK_HASH_MASK)
static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE];
static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE];
static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE];
struct nfs4_stateid *
find_stateid(stateid_t *stid, int flags)
{
struct list_head *pos, *next;
struct nfs4_stateid *local = NULL;
u32 st_id = stid->si_stateownerid;
u32 f_id = stid->si_fileid;
unsigned int hashval;
dprintk("NFSD: find_stateid flags 0x%x\n",flags);
if ((flags & LOCK_STATE) || (flags & RDWR_STATE)) {
hashval = stateid_hashval(st_id, f_id);
list_for_each_safe(pos, next, &lockstateid_hashtbl[hashval]) {
local = list_entry(pos, struct nfs4_stateid, st_hash);
if((local->st_stateid.si_stateownerid == st_id) &&
(local->st_stateid.si_fileid == f_id))
return local;
}
}
if ((flags & OPEN_STATE) || (flags & RDWR_STATE)) {
hashval = stateid_hashval(st_id, f_id);
list_for_each_safe(pos, next, &stateid_hashtbl[hashval]) {
local = list_entry(pos, struct nfs4_stateid, st_hash);
if((local->st_stateid.si_stateownerid == st_id) &&
(local->st_stateid.si_fileid == f_id))
return local;
}
} else
printk("NFSD: find_stateid: ERROR: no state flag\n");
return NULL;
}
/*
* TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
* we can't properly handle lock requests that go beyond the (2^63 - 1)-th
* byte, because of sign extension problems. Since NFSv4 calls for 64-bit
* locking, this prevents us from being completely protocol-compliant. The
* real solution to this problem is to start using unsigned file offsets in
* the VFS, but this is a very deep change!
*/
static inline void
nfs4_transform_lock_offset(struct file_lock *lock)
{
if (lock->fl_start < 0)
lock->fl_start = OFFSET_MAX;
if (lock->fl_end < 0)
lock->fl_end = OFFSET_MAX;
}
int
nfs4_verify_lock_stateowner(struct nfs4_stateowner *sop, unsigned int hashval)
{
struct list_head *pos, *next;
struct nfs4_stateowner *local = NULL;
int status = 0;
if (hashval >= LOCK_HASH_SIZE)
goto out;
list_for_each_safe(pos, next, &lock_ownerid_hashtbl[hashval]) {
local = list_entry(pos, struct nfs4_stateowner, so_idhash);
if (local == sop) {
status = 1;
goto out;
}
}
out:
return status;
}
static inline void
nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny)
{
struct nfs4_stateowner *sop = (struct nfs4_stateowner *) fl->fl_owner;
deny->ld_sop = NULL;
if (nfs4_verify_lock_stateowner(sop, fl->fl_pid))
deny->ld_sop = sop;
deny->ld_start = fl->fl_start;
deny->ld_length = ~(u64)0;
if (fl->fl_end != ~(u64)0)
deny->ld_length = fl->fl_end - fl->fl_start + 1;
deny->ld_type = NFS4_READ_LT;
if (fl->fl_type != F_RDLCK)
deny->ld_type = NFS4_WRITE_LT;
}
static int
find_lockstateowner_str(unsigned int hashval, struct xdr_netobj *owner, clientid_t *clid, struct nfs4_stateowner **op) {
struct list_head *pos, *next;
struct nfs4_stateowner *local = NULL;
list_for_each_safe(pos, next, &lock_ownerstr_hashtbl[hashval]) {
local = list_entry(pos, struct nfs4_stateowner, so_strhash);
if(!cmp_owner_str(local, owner, clid))
continue;
*op = local;
return(1);
}
*op = NULL;
return 0;
}
/*
* Alloc a lock owner structure.
* Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
* occured.
*
* strhashval = lock_ownerstr_hashval
* so_seqid = lock->lk_new_lock_seqid - 1: it gets bumped in encode
*/
static struct nfs4_stateowner *
alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) {
struct nfs4_stateowner *sop;
struct nfs4_replay *rp;
unsigned int idhashval;
if (!(sop = alloc_stateowner(&lock->lk_new_owner)))
return (struct nfs4_stateowner *)NULL;
idhashval = lockownerid_hashval(current_ownerid);
INIT_LIST_HEAD(&sop->so_idhash);
INIT_LIST_HEAD(&sop->so_strhash);
INIT_LIST_HEAD(&sop->so_perclient);
INIT_LIST_HEAD(&sop->so_perfilestate);
INIT_LIST_HEAD(&sop->so_perlockowner);
list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]);
list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]);
list_add(&sop->so_perclient, &clp->cl_perclient);
list_add(&sop->so_perlockowner, &open_stp->st_perlockowner);
add_perclient++;
sop->so_is_open_owner = 0;
sop->so_id = current_ownerid++;
sop->so_client = clp;
sop->so_seqid = lock->lk_new_lock_seqid - 1;
sop->so_confirmed = 1;
rp = &sop->so_replay;
rp->rp_status = NFSERR_SERVERFAULT;
rp->rp_buflen = 0;
rp->rp_buf = rp->rp_ibuf;
alloc_lsowner++;
return sop;
}
struct nfs4_stateid *
alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp)
{
struct nfs4_stateid *stp;
unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id);
if ((stp = kmalloc(sizeof(struct nfs4_stateid),
GFP_KERNEL)) == NULL)
goto out;
INIT_LIST_HEAD(&stp->st_hash);
INIT_LIST_HEAD(&stp->st_perfile);
INIT_LIST_HEAD(&stp->st_perfilestate);
INIT_LIST_HEAD(&stp->st_perlockowner); /* not used */
list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]);
list_add(&stp->st_perfile, &fp->fi_perfile);
list_add_perfile++;
list_add(&stp->st_perfilestate, &sop->so_perfilestate);
stp->st_stateowner = sop;
stp->st_file = fp;
stp->st_stateid.si_boot = boot_time;
stp->st_stateid.si_stateownerid = sop->so_id;
stp->st_stateid.si_fileid = fp->fi_id;
stp->st_stateid.si_generation = 0;
stp->st_vfs_file = open_stp->st_vfs_file;
stp->st_vfs_set = open_stp->st_vfs_set;
stp->st_access_bmap = open_stp->st_access_bmap;
stp->st_deny_bmap = open_stp->st_deny_bmap;
out:
return stp;
}
int
check_lock_length(u64 offset, u64 length)
{
return ((length == 0) || ((length != ~(u64)0) &&
LOFF_OVERFLOW(offset, length)));
}
/*
* LOCK operation
*/
int
nfsd4_lock(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lock *lock)
{
struct nfs4_stateowner *lock_sop = NULL, *open_sop = NULL;
struct nfs4_stateid *lock_stp;
struct file *filp;
struct file_lock file_lock;
struct file_lock *conflock;
int status = 0;
unsigned int strhashval;
dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
(long long) lock->lk_offset,
(long long) lock->lk_length);
if (check_lock_length(lock->lk_offset, lock->lk_length))
return nfserr_inval;
lock->lk_stateowner = NULL;
nfs4_lock_state();
if (lock->lk_is_new) {
/*
* Client indicates that this is a new lockowner.
* Use open owner and open stateid to create lock owner and lock
* stateid.
*/
struct nfs4_stateid *open_stp = NULL;
struct nfs4_file *fp;
status = nfserr_stale_clientid;
if (STALE_CLIENTID(&lock->lk_new_clientid)) {
printk("NFSD: nfsd4_lock: clientid is stale!\n");
goto out;
}
/* does the clientid in the lock owner own the open stateid? */
/* validate and update open stateid and open seqid */
status = nfs4_preprocess_seqid_op(current_fh,
lock->lk_new_open_seqid,
&lock->lk_new_open_stateid,
CHECK_FH | OPEN_STATE,
&open_sop, &open_stp,
&lock->v.new.clientid);
if (status)
goto out;
/* create lockowner and lock stateid */
fp = open_stp->st_file;
strhashval = lock_ownerstr_hashval(fp->fi_inode,
open_sop->so_client->cl_clientid.cl_id,
lock->v.new.owner);
/*
* If we already have this lock owner, the client is in
* error (or our bookeeping is wrong!)
* for asking for a 'new lock'.
*/
status = nfserr_bad_stateid;
if (find_lockstateowner_str(strhashval, &lock->v.new.owner,
&lock->v.new.clientid, &lock_sop))
goto out;
status = nfserr_resource;
if (!(lock->lk_stateowner = alloc_init_lock_stateowner(strhashval, open_sop->so_client, open_stp, lock)))
goto out;
if ((lock_stp = alloc_init_lock_stateid(lock->lk_stateowner,
fp, open_stp)) == NULL)
goto out;
/* bump the open seqid used to create the lock */
open_sop->so_seqid++;
} else {
/* lock (lock owner + lock stateid) already exists */
status = nfs4_preprocess_seqid_op(current_fh,
lock->lk_old_lock_seqid,
&lock->lk_old_lock_stateid,
CHECK_FH | LOCK_STATE,
&lock->lk_stateowner, &lock_stp, NULL);
if (status)
goto out;
}
/* lock->lk_stateowner and lock_stp have been created or found */
filp = &lock_stp->st_vfs_file;
if ((status = fh_verify(rqstp, current_fh, S_IFREG, MAY_LOCK))) {
printk("NFSD: nfsd4_lock: permission denied!\n");
goto out;
}
switch (lock->lk_type) {
case NFS4_READ_LT:
case NFS4_READW_LT:
file_lock.fl_type = F_RDLCK;
break;
case NFS4_WRITE_LT:
case NFS4_WRITEW_LT:
file_lock.fl_type = F_WRLCK;
break;
default:
status = nfserr_inval;
goto out;
}
file_lock.fl_owner = (fl_owner_t) lock->lk_stateowner;
file_lock.fl_pid = lockownerid_hashval(lock->lk_stateowner->so_id);
file_lock.fl_file = filp;
file_lock.fl_flags = FL_POSIX;
file_lock.fl_notify = NULL;
file_lock.fl_insert = NULL;
file_lock.fl_remove = NULL;
file_lock.fl_start = lock->lk_offset;
if ((lock->lk_length == ~(u64)0) ||
LOFF_OVERFLOW(lock->lk_offset, lock->lk_length))
file_lock.fl_end = ~(u64)0;
else
file_lock.fl_end = lock->lk_offset + lock->lk_length - 1;
nfs4_transform_lock_offset(&file_lock);
/*
* Try to lock the file in the VFS.
* Note: locks.c uses the BKL to protect the inode's lock list.
*/
status = posix_lock_file(filp, &file_lock);
dprintk("NFSD: nfsd4_lock: posix_test_lock passed. posix_lock_file status %d\n",status);
switch (-status) {
case 0: /* success! */
update_stateid(&lock_stp->st_stateid);
memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid,
sizeof(stateid_t));
goto out;
case (EAGAIN):
goto conflicting_lock;
case (EDEADLK):
status = nfserr_deadlock;
default:
dprintk("NFSD: nfsd4_lock: posix_lock_file() failed! status %d\n",status);
goto out_destroy_new_stateid;
}
conflicting_lock:
dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
status = nfserr_denied;
/* XXX There is a race here. Future patch needed to provide
* an atomic posix_lock_and_test_file
*/
if (!(conflock = posix_test_lock(filp, &file_lock))) {
status = nfserr_serverfault;
goto out;
}
nfs4_set_lock_denied(conflock, &lock->lk_denied);
out_destroy_new_stateid:
if (lock->lk_is_new) {
dprintk("NFSD: nfsd4_lock: destroy new stateid!\n");
/*
* An error encountered after instantiation of the new
* stateid has forced us to destroy it.
*/
if (!seqid_mutating_err(status))
open_sop->so_seqid--;
release_state_owner(lock_stp, &lock->lk_stateowner, LOCK_STATE);
}
out:
nfs4_unlock_state();
return status;
}
/*
* LOCKT operation
*/
int
nfsd4_lockt(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lockt *lockt)
{
struct inode *inode;
struct nfs4_stateowner *sop;
struct file file;
struct file_lock file_lock;
struct file_lock *conflicting_lock;
unsigned int strhashval;
int status;
if (check_lock_length(lockt->lt_offset, lockt->lt_length))
return nfserr_inval;
lockt->lt_stateowner = NULL;
nfs4_lock_state();
status = nfserr_stale_clientid;
if (STALE_CLIENTID(&lockt->lt_clientid)) {
printk("NFSD: nfsd4_lockt: clientid is stale!\n");
goto out;
}
if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0))) {
printk("NFSD: nfsd4_lockt: fh_verify() failed!\n");
if (status == nfserr_symlink)
status = nfserr_inval;
goto out;
}
inode = current_fh->fh_dentry->d_inode;
switch (lockt->lt_type) {
case NFS4_READ_LT:
case NFS4_READW_LT:
file_lock.fl_type = F_RDLCK;
break;
case NFS4_WRITE_LT:
case NFS4_WRITEW_LT:
file_lock.fl_type = F_WRLCK;
break;
default:
printk("NFSD: nfs4_lockt: bad lock type!\n");
status = nfserr_inval;
goto out;
}
strhashval = lock_ownerstr_hashval(inode,
lockt->lt_clientid.cl_id, lockt->lt_owner);
find_lockstateowner_str(strhashval, &lockt->lt_owner,
&lockt->lt_clientid,
&lockt->lt_stateowner);
sop = lockt->lt_stateowner;
if (sop) {
file_lock.fl_owner = (fl_owner_t) sop;
file_lock.fl_pid = lockownerid_hashval(sop->so_id);
} else {
file_lock.fl_owner = NULL;
file_lock.fl_pid = 0;
}
file_lock.fl_flags = FL_POSIX;
file_lock.fl_start = lockt->lt_offset;
if ((lockt->lt_length == ~(u64)0) || LOFF_OVERFLOW(lockt->lt_offset, lockt->lt_length))
file_lock.fl_end = ~(u64)0;
else
file_lock.fl_end = lockt->lt_offset + lockt->lt_length - 1;
nfs4_transform_lock_offset(&file_lock);
/* posix_test_lock uses the struct file _only_ to resolve the inode.
* since LOCKT doesn't require an OPEN, and therefore a struct
* file may not exist, pass posix_test_lock a struct file with
* only the dentry:inode set.
*/
memset(&file, 0, sizeof (struct file));
file.f_dentry = current_fh->fh_dentry;
status = nfs_ok;
conflicting_lock = posix_test_lock(&file, &file_lock);
if (conflicting_lock) {
status = nfserr_denied;
nfs4_set_lock_denied(conflicting_lock, &lockt->lt_denied);
}
out:
nfs4_unlock_state();
return status;
}
int
nfsd4_locku(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_locku *locku)
{
struct nfs4_stateid *stp;
struct file *filp = NULL;
struct file_lock file_lock;
int status;
dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
(long long) locku->lu_offset,
(long long) locku->lu_length);
if (check_lock_length(locku->lu_offset, locku->lu_length))
return nfserr_inval;
nfs4_lock_state();
if ((status = nfs4_preprocess_seqid_op(current_fh,
locku->lu_seqid,
&locku->lu_stateid,
CHECK_FH | LOCK_STATE,
&locku->lu_stateowner, &stp, NULL)))
goto out;
filp = &stp->st_vfs_file;
BUG_ON(!filp);
file_lock.fl_type = F_UNLCK;
file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner;
file_lock.fl_pid = lockownerid_hashval(locku->lu_stateowner->so_id);
file_lock.fl_file = filp;
file_lock.fl_flags = FL_POSIX;
file_lock.fl_notify = NULL;
file_lock.fl_insert = NULL;
file_lock.fl_remove = NULL;
file_lock.fl_start = locku->lu_offset;
if ((locku->lu_length == ~(u64)0) || LOFF_OVERFLOW(locku->lu_offset, locku->lu_length))
file_lock.fl_end = ~(u64)0;
else
file_lock.fl_end = locku->lu_offset + locku->lu_length - 1;
nfs4_transform_lock_offset(&file_lock);
/*
* Try to unlock the file in the VFS.
*/
status = posix_lock_file(filp, &file_lock);
if (status) {
printk("NFSD: nfs4_locku: posix_lock_file failed!\n");
goto out_nfserr;
}
/*
* OK, unlock succeeded; the only thing left to do is update the stateid.
*/
update_stateid(&stp->st_stateid);
memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t));
out:
nfs4_unlock_state();
return status;
out_nfserr:
status = nfserrno(status);
goto out;
}
/*
* returns
* 1: locks held by lockowner
* 0: no locks held by lockowner
*/
static int
check_for_locks(struct file *filp, struct nfs4_stateowner *lowner)
{
struct file_lock **flpp;
struct inode *inode = filp->f_dentry->d_inode;
int status = 0;
lock_kernel();
for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) {
if ((*flpp)->fl_owner == (fl_owner_t)lowner)
status = 1;
goto out;
}
out:
unlock_kernel();
return status;
}
int
nfsd4_release_lockowner(struct svc_rqst *rqstp, struct nfsd4_release_lockowner *rlockowner)
{
clientid_t *clid = &rlockowner->rl_clientid;
struct list_head *pos, *next;
struct nfs4_stateowner *local = NULL;
struct xdr_netobj *owner = &rlockowner->rl_owner;
int status, i;
dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
clid->cl_boot, clid->cl_id);
/* XXX check for lease expiration */
status = nfserr_stale_clientid;
if (STALE_CLIENTID(clid)) {
printk("NFSD: nfsd4_release_lockowner: clientid is stale!\n");
return status;
}
nfs4_lock_state();
/* find the lockowner */
status = nfs_ok;
for (i=0; i < LOCK_HASH_SIZE; i++) {
list_for_each_safe(pos, next, &lock_ownerstr_hashtbl[i]) {
local = list_entry(pos, struct nfs4_stateowner,
so_strhash);
if(cmp_owner_str(local, owner, clid))
break;
}
}
if (local) {
struct nfs4_stateid *stp;
/* check for any locks held by any stateid associated with the
* (lock) stateowner */
status = nfserr_locks_held;
list_for_each_safe(pos, next, &local->so_perfilestate) {
stp = list_entry(pos, struct nfs4_stateid,
st_perfilestate);
if(stp->st_vfs_set) {
if (check_for_locks(&stp->st_vfs_file, local))
goto out;
}
}
/* no locks held by (lock) stateowner */
status = nfs_ok;
release_stateowner(local);
}
out:
nfs4_unlock_state();
return status;
}
/*
* Start and stop routines
*/
void
nfs4_state_init(void)
{
int i;
if (nfs4_init)
return;
for (i = 0; i < CLIENT_HASH_SIZE; i++) {
INIT_LIST_HEAD(&conf_id_hashtbl[i]);
INIT_LIST_HEAD(&conf_str_hashtbl[i]);
INIT_LIST_HEAD(&unconf_str_hashtbl[i]);
INIT_LIST_HEAD(&unconf_id_hashtbl[i]);
}
for (i = 0; i < FILE_HASH_SIZE; i++) {
INIT_LIST_HEAD(&file_hashtbl[i]);
}
for (i = 0; i < OWNER_HASH_SIZE; i++) {
INIT_LIST_HEAD(&ownerstr_hashtbl[i]);
INIT_LIST_HEAD(&ownerid_hashtbl[i]);
}
for (i = 0; i < STATEID_HASH_SIZE; i++) {
INIT_LIST_HEAD(&stateid_hashtbl[i]);
INIT_LIST_HEAD(&lockstateid_hashtbl[i]);
}
for (i = 0; i < LOCK_HASH_SIZE; i++) {
INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]);
INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]);
}
memset(&zerostateid, 0, sizeof(stateid_t));
memset(&onestateid, ~0, sizeof(stateid_t));
INIT_LIST_HEAD(&client_lru);
init_MUTEX(&client_sema);
boot_time = get_seconds();
INIT_WORK(&laundromat_work,laundromat_main, NULL);
schedule_delayed_work(&laundromat_work, NFSD_LEASE_TIME*HZ);
nfs4_init = 1;
}
static void
__nfs4_state_shutdown(void)
{
int i;
struct nfs4_client *clp = NULL;
for (i = 0; i < CLIENT_HASH_SIZE; i++) {
while (!list_empty(&conf_id_hashtbl[i])) {
clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
expire_client(clp);
}
while (!list_empty(&unconf_str_hashtbl[i])) {
clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash);
expire_client(clp);
}
}
release_all_files();
cancel_delayed_work(&laundromat_work);
flush_scheduled_work();
nfs4_init = 0;
dprintk("NFSD: list_add_perfile %d list_del_perfile %d\n",
list_add_perfile, list_del_perfile);
dprintk("NFSD: add_perclient %d del_perclient %d\n",
add_perclient, del_perclient);
dprintk("NFSD: alloc_file %d free_file %d\n",
alloc_file, free_file);
dprintk("NFSD: alloc_sowner %d alloc_lsowner %d free_sowner %d\n",
alloc_sowner, alloc_lsowner, free_sowner);
dprintk("NFSD: vfsopen %d vfsclose %d\n",
vfsopen, vfsclose);
}
void
nfs4_state_shutdown(void)
{
nfs4_lock_state();
__nfs4_state_shutdown();
nfs4_unlock_state();
}
![[BACK]](/icons/back.gif){kind=icon}
Return to nfs4state.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [Development] / linux-2.6-xfs / fs / nfsd