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nfsd: add alloc and free functions for DRC entries 

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Jeff Layton 2013-01-28 14:41:11 -05:00 committed by J. Bruce Fields
parent 8a8bc40d9b
commit f09841fdfa
1 changed files with 27 additions and 9 deletions
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36
fs/nfsd/nfscache.c
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@ -47,10 +47,34 @@ static int nfsd_cache_append(struct svc_rqst *rqstp, struct kvec *vec);
*/
static DEFINE_SPINLOCK(cache_lock);
int nfsd_reply_cache_init(void)
static struct svc_cacherep *
nfsd_reply_cache_alloc(void)
{
struct svc_cacherep *rp;
rp = kmem_cache_alloc(drc_slab, GFP_KERNEL);
if (rp) {
rp->c_state = RC_UNUSED;
rp->c_type = RC_NOCACHE;
INIT_LIST_HEAD(&rp->c_lru);
INIT_HLIST_NODE(&rp->c_hash);
}
return rp;
}
static void
nfsd_reply_cache_free_locked(struct svc_cacherep *rp)
{
if (rp->c_state == RC_DONE && rp->c_type == RC_REPLBUFF)
kfree(rp->c_replvec.iov_base);
list_del(&rp->c_lru);
kmem_cache_free(drc_slab, rp);
}
int nfsd_reply_cache_init(void)
{
int i;
struct svc_cacherep *rp;
drc_slab = kmem_cache_create("nfsd_drc", sizeof(struct svc_cacherep),
0, 0, NULL);
@ -60,13 +84,10 @@ int nfsd_reply_cache_init(void)
INIT_LIST_HEAD(&lru_head);
i = CACHESIZE;
while (i) {
rp = kmem_cache_alloc(drc_slab, GFP_KERNEL);
rp = nfsd_reply_cache_alloc();
if (!rp)
goto out_nomem;
list_add(&rp->c_lru, &lru_head);
rp->c_state = RC_UNUSED;
rp->c_type = RC_NOCACHE;
INIT_HLIST_NODE(&rp->c_hash);
i--;
}
@ -88,10 +109,7 @@ void nfsd_reply_cache_shutdown(void)
while (!list_empty(&lru_head)) {
rp = list_entry(lru_head.next, struct svc_cacherep, c_lru);
if (rp->c_state == RC_DONE && rp->c_type == RC_REPLBUFF)
kfree(rp->c_replvec.iov_base);
list_del(&rp->c_lru);
kmem_cache_free(drc_slab, rp);
nfsd_reply_cache_free_locked(rp);
}
cache_disabled = 1;