NFS: Clean up nfs_access_zap_cache()
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 58b1f74..1c71fc2 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1697,6 +1697,17 @@
smp_mb__after_atomic_dec();
}
+static void nfs_access_free_list(struct list_head *head)
+{
+ struct nfs_access_entry *cache;
+
+ while (!list_empty(head)) {
+ cache = list_entry(head->next, struct nfs_access_entry, lru);
+ list_del(&cache->lru);
+ nfs_access_free_entry(cache);
+ }
+}
+
int nfs_access_cache_shrinker(int nr_to_scan, gfp_t gfp_mask)
{
LIST_HEAD(head);
@@ -1743,52 +1754,41 @@
goto restart;
}
spin_unlock(&nfs_access_lru_lock);
- while (!list_empty(&head)) {
- cache = list_entry(head.next, struct nfs_access_entry, lru);
- list_del(&cache->lru);
- nfs_access_free_entry(cache);
- }
+ nfs_access_free_list(&head);
return (atomic_long_read(&nfs_access_nr_entries) / 100) * sysctl_vfs_cache_pressure;
}
-static void __nfs_access_zap_cache(struct inode *inode)
+static void __nfs_access_zap_cache(struct nfs_inode *nfsi, struct list_head *head)
{
- struct nfs_inode *nfsi = NFS_I(inode);
struct rb_root *root_node = &nfsi->access_cache;
- struct rb_node *n, *dispose = NULL;
+ struct rb_node *n;
struct nfs_access_entry *entry;
/* Unhook entries from the cache */
while ((n = rb_first(root_node)) != NULL) {
entry = rb_entry(n, struct nfs_access_entry, rb_node);
rb_erase(n, root_node);
- list_del(&entry->lru);
- n->rb_left = dispose;
- dispose = n;
+ list_move(&entry->lru, head);
}
nfsi->cache_validity &= ~NFS_INO_INVALID_ACCESS;
- spin_unlock(&inode->i_lock);
-
- /* Now kill them all! */
- while (dispose != NULL) {
- n = dispose;
- dispose = n->rb_left;
- nfs_access_free_entry(rb_entry(n, struct nfs_access_entry, rb_node));
- }
}
void nfs_access_zap_cache(struct inode *inode)
{
+ LIST_HEAD(head);
+
+ if (test_bit(NFS_INO_ACL_LRU_SET, &NFS_I(inode)->flags) == 0)
+ return;
/* Remove from global LRU init */
- if (test_and_clear_bit(NFS_INO_ACL_LRU_SET, &NFS_I(inode)->flags)) {
- spin_lock(&nfs_access_lru_lock);
+ spin_lock(&nfs_access_lru_lock);
+ if (test_and_clear_bit(NFS_INO_ACL_LRU_SET, &NFS_I(inode)->flags))
list_del_init(&NFS_I(inode)->access_cache_inode_lru);
- spin_unlock(&nfs_access_lru_lock);
- }
spin_lock(&inode->i_lock);
- /* This will release the spinlock */
- __nfs_access_zap_cache(inode);
+ __nfs_access_zap_cache(NFS_I(inode), &head);
+ spin_unlock(&inode->i_lock);
+ spin_unlock(&nfs_access_lru_lock);
+ nfs_access_free_list(&head);
}
static struct nfs_access_entry *nfs_access_search_rbtree(struct inode *inode, struct rpc_cred *cred)
@@ -1839,8 +1839,8 @@
nfs_access_free_entry(cache);
return -ENOENT;
out_zap:
- /* This will release the spinlock */
- __nfs_access_zap_cache(inode);
+ spin_unlock(&inode->i_lock);
+ nfs_access_zap_cache(inode);
return -ENOENT;
}
@@ -1895,9 +1895,11 @@
smp_mb__after_atomic_inc();
/* Add inode to global LRU list */
- if (!test_and_set_bit(NFS_INO_ACL_LRU_SET, &NFS_I(inode)->flags)) {
+ if (!test_bit(NFS_INO_ACL_LRU_SET, &NFS_I(inode)->flags)) {
spin_lock(&nfs_access_lru_lock);
- list_add_tail(&NFS_I(inode)->access_cache_inode_lru, &nfs_access_lru_list);
+ if (!test_and_set_bit(NFS_INO_ACL_LRU_SET, &NFS_I(inode)->flags))
+ list_add_tail(&NFS_I(inode)->access_cache_inode_lru,
+ &nfs_access_lru_list);
spin_unlock(&nfs_access_lru_lock);
}
}