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Commit f09841fd authored by Jeff Layton's avatar Jeff Layton Committed by J. Bruce Fields
Browse files

nfsd: add alloc and free functions for DRC entries 



Signed-off-by: default avatarJeff Layton <jlayton@redhat.com>
Signed-off-by: default avatarJ. Bruce Fields <bfields@redhat.com>
parent 8a8bc40d

fs/nfsd/nfscache.c

+27 −9
Original line number Diff line number Diff line
@@ -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;