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nfsd4: cleanup lock/stateowner initialization 

Share some common code, stop doing silly things like initializing a list
head immediately before adding it to a list, etc.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
J. Bruce Fields 2011-08-12 09:42:57 -04:00
parent 506f275fff
commit ff194bd959
1 changed files with 53 additions and 49 deletions
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102
fs/nfsd/nfs4state.c
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@ -2215,51 +2215,61 @@ nfs4_free_stateowner(struct kref *kref)
kmem_cache_free(stateowner_slab, sop);
}
static inline struct nfs4_stateowner *
alloc_stateowner(struct xdr_netobj *owner)
static void init_nfs4_replay(struct nfs4_replay *rp)
{
rp->rp_status = nfserr_serverfault;
rp->rp_buflen = 0;
rp->rp_buf = rp->rp_ibuf;
}
static inline struct nfs4_stateowner *alloc_stateowner(struct xdr_netobj *owner, struct nfs4_client *clp)
{
struct nfs4_stateowner *sop;
if ((sop = kmem_cache_alloc(stateowner_slab, 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;
kref_init(&sop->so_ref);
return sop;
}
sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL);
if (!sop)
return NULL;
sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL);
if (!sop->so_owner.data) {
kmem_cache_free(stateowner_slab, sop);
return NULL;
}
return NULL;
sop->so_owner.len = owner->len;
kref_init(&sop->so_ref);
INIT_LIST_HEAD(&sop->so_perclient);
INIT_LIST_HEAD(&sop->so_stateids);
INIT_LIST_HEAD(&sop->so_perstateid);
INIT_LIST_HEAD(&sop->so_close_lru);
sop->so_id = current_ownerid++;
sop->so_time = 0;
sop->so_client = clp;
init_nfs4_replay(&sop->so_replay);
return sop;
}
static void hash_openowner(struct nfs4_stateowner *sop, struct nfs4_client *clp, unsigned int strhashval)
{
unsigned int idhashval;
idhashval = open_ownerid_hashval(sop->so_id);
list_add(&sop->so_idhash, &open_ownerid_hashtbl[idhashval]);
list_add(&sop->so_strhash, &open_ownerstr_hashtbl[strhashval]);
list_add(&sop->so_perclient, &clp->cl_openowners);
}
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)))
sop = alloc_stateowner(&open->op_owner, clp);
if (!sop)
return NULL;
idhashval = open_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_stateids);
INIT_LIST_HEAD(&sop->so_perstateid); /* not used */
INIT_LIST_HEAD(&sop->so_close_lru);
sop->so_time = 0;
list_add(&sop->so_idhash, &open_ownerid_hashtbl[idhashval]);
list_add(&sop->so_strhash, &open_ownerstr_hashtbl[strhashval]);
list_add(&sop->so_perclient, &clp->cl_openowners);
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;
hash_openowner(sop, clp, strhashval);
return sop;
}
@ -3902,6 +3912,16 @@ find_lockstateowner_str(struct inode *inode, clientid_t *clid,
return NULL;
}
static void hash_lockowner(struct nfs4_stateowner *sop, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp)
{
unsigned int idhashval;
idhashval = lockownerid_hashval(sop->so_id);
list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]);
list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]);
list_add(&sop->so_perstateid, &open_stp->st_lockowners);
}
/*
* Alloc a lock owner structure.
* Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
@ -3913,33 +3933,17 @@ find_lockstateowner_str(struct inode *inode, clientid_t *clid,
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)))
sop = alloc_stateowner(&lock->lk_new_owner, clp);
if (!sop)
return 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_stateids);
INIT_LIST_HEAD(&sop->so_perstateid);
INIT_LIST_HEAD(&sop->so_close_lru); /* not used */
sop->so_time = 0;
list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]);
list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]);
list_add(&sop->so_perstateid, &open_stp->st_lockowners);
sop->so_is_open_owner = 0;
sop->so_id = current_ownerid++;
sop->so_client = clp;
/* It is the openowner seqid that will be incremented in encode in the
* case of new lockowners; so increment the lock seqid manually: */
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;
hash_lockowner(sop, strhashval, clp, open_stp);
return sop;
}