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>
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@ -47,10 +47,34 @@ static int nfsd_cache_append(struct svc_rqst *rqstp, struct kvec *vec);
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*/
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*/
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static DEFINE_SPINLOCK(cache_lock);
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static DEFINE_SPINLOCK(cache_lock);
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int nfsd_reply_cache_init(void)
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static struct svc_cacherep *
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nfsd_reply_cache_alloc(void)
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{
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{
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struct svc_cacherep *rp;
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struct svc_cacherep *rp;
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rp = kmem_cache_alloc(drc_slab, GFP_KERNEL);
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if (rp) {
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rp->c_state = RC_UNUSED;
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rp->c_type = RC_NOCACHE;
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INIT_LIST_HEAD(&rp->c_lru);
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INIT_HLIST_NODE(&rp->c_hash);
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}
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return rp;
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}
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static void
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nfsd_reply_cache_free_locked(struct svc_cacherep *rp)
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{
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if (rp->c_state == RC_DONE && rp->c_type == RC_REPLBUFF)
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kfree(rp->c_replvec.iov_base);
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list_del(&rp->c_lru);
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kmem_cache_free(drc_slab, rp);
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}
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int nfsd_reply_cache_init(void)
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{
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int i;
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int i;
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struct svc_cacherep *rp;
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drc_slab = kmem_cache_create("nfsd_drc", sizeof(struct svc_cacherep),
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drc_slab = kmem_cache_create("nfsd_drc", sizeof(struct svc_cacherep),
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0, 0, NULL);
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0, 0, NULL);
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@ -60,13 +84,10 @@ int nfsd_reply_cache_init(void)
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INIT_LIST_HEAD(&lru_head);
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INIT_LIST_HEAD(&lru_head);
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i = CACHESIZE;
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i = CACHESIZE;
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while (i) {
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while (i) {
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rp = kmem_cache_alloc(drc_slab, GFP_KERNEL);
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rp = nfsd_reply_cache_alloc();
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if (!rp)
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if (!rp)
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goto out_nomem;
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goto out_nomem;
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list_add(&rp->c_lru, &lru_head);
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list_add(&rp->c_lru, &lru_head);
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rp->c_state = RC_UNUSED;
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rp->c_type = RC_NOCACHE;
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INIT_HLIST_NODE(&rp->c_hash);
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i--;
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i--;
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}
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}
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@ -88,10 +109,7 @@ void nfsd_reply_cache_shutdown(void)
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while (!list_empty(&lru_head)) {
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while (!list_empty(&lru_head)) {
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rp = list_entry(lru_head.next, struct svc_cacherep, c_lru);
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rp = list_entry(lru_head.next, struct svc_cacherep, c_lru);
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if (rp->c_state == RC_DONE && rp->c_type == RC_REPLBUFF)
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nfsd_reply_cache_free_locked(rp);
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kfree(rp->c_replvec.iov_base);
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list_del(&rp->c_lru);
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kmem_cache_free(drc_slab, rp);
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}
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}
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cache_disabled = 1;
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cache_disabled = 1;
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