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-rw-r--r--fs/nfs/dir.c4
-rw-r--r--include/linux/nfs_mount.h4
2 files changed, 8 insertions, 0 deletions
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 74f92b717f78..49d565412827 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -667,6 +667,8 @@ static int nfs_check_verifier(struct inode *dir, struct dentry *dentry)
{
if (IS_ROOT(dentry))
return 1;
+ if (NFS_SERVER(dir)->flags & NFS_MOUNT_LOOKUP_CACHE_NONE)
+ return 0;
if (!nfs_verify_change_attribute(dir, dentry->d_time))
return 0;
/* Revalidate nfsi->cache_change_attribute before we declare a match */
@@ -750,6 +752,8 @@ int nfs_neg_need_reval(struct inode *dir, struct dentry *dentry,
/* Don't revalidate a negative dentry if we're creating a new file */
if (nd != NULL && nfs_lookup_check_intent(nd, LOOKUP_CREATE) != 0)
return 0;
+ if (NFS_SERVER(dir)->flags & NFS_MOUNT_LOOKUP_CACHE_NONEG)
+ return 1;
return !nfs_check_verifier(dir, dentry);
}
diff --git a/include/linux/nfs_mount.h b/include/linux/nfs_mount.h
index df7c6b7a7ebb..6549a06ac16e 100644
--- a/include/linux/nfs_mount.h
+++ b/include/linux/nfs_mount.h
@@ -65,4 +65,8 @@ struct nfs_mount_data {
#define NFS_MOUNT_UNSHARED 0x8000 /* 5 */
#define NFS_MOUNT_FLAGMASK 0xFFFF
+/* The following are for internal use only */
+#define NFS_MOUNT_LOOKUP_CACHE_NONEG 0x10000
+#define NFS_MOUNT_LOOKUP_CACHE_NONE 0x20000
+
#endif