linux 2.6.16.38 w/ vs2.0.3-rc1

[linux-2.6.git] / fs / nfs / idmap.c

diff --git a/fs/nfs/idmap.c b/fs/nfs/idmap.c
index 87f4f9a..821edd3 100644 (file)
--- a/fs/nfs/idmap.c
+++ b/fs/nfs/idmap.c
@@ -50,10 +50,15 @@
 #include <linux/nfs_fs.h>
 
 #include <linux/nfs_idmap.h>
+#include "nfs4_fs.h"
 
 #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];
@@ -148,6 +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;
 }
 
@@ -163,6 +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;
 }
 
@@ -191,6 +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;
 }
 
 /*