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-rw-r--r--fs/nfs/idmap.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/nfs/idmap.c b/fs/nfs/idmap.c
index ffb8df91dc34..821edd30333b 100644
--- a/fs/nfs/idmap.c
+++ b/fs/nfs/idmap.c
@@ -54,7 +54,11 @@
#define IDMAP_HASH_SZ 128
+/* Default cache timeout is 10 minutes */
+unsigned int nfs_idmap_cache_timeout = 600 * HZ;
+
struct idmap_hashent {
+ unsigned long ih_expires;
__u32 ih_id;
int ih_namelen;
char ih_name[IDMAP_NAMESZ];
@@ -149,6 +153,8 @@ idmap_lookup_name(struct idmap_hashtable *h, const char *name, size_t len)
if (he->ih_namelen != len || memcmp(he->ih_name, name, len) != 0)
return NULL;
+ if (time_after(jiffies, he->ih_expires))
+ return NULL;
return he;
}
@@ -164,6 +170,8 @@ idmap_lookup_id(struct idmap_hashtable *h, __u32 id)
struct idmap_hashent *he = idmap_id_hash(h, id);
if (he->ih_id != id || he->ih_namelen == 0)
return NULL;
+ if (time_after(jiffies, he->ih_expires))
+ return NULL;
return he;
}
@@ -192,6 +200,7 @@ idmap_update_entry(struct idmap_hashent *he, const char *name,
memcpy(he->ih_name, name, namelen);
he->ih_name[namelen] = '\0';
he->ih_namelen = namelen;
+ he->ih_expires = jiffies + nfs_idmap_cache_timeout;
}
/*