cifs: use CreationTime like an i_generation field

Reduce false inode collisions by using the CreationTime like an
i_generation field. This way, even if the server ends up reusing
a uniqueid after a delete/create cycle, we can avoid matching
the inode incorrectly.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index e6590e69fb0e..606ca8bb7102 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -453,6 +453,7 @@ struct cifsInodeInfo {
         bool invalid_mapping:1;         /* pagecache is invalid */
         u64  server_eof;                /* current file size on server */
         u64  uniqueid;                  /* server inode number */
+        u64  createtime;                /* creation time on server */
 #ifdef CONFIG_CIFS_FSCACHE
         struct fscache_cookie *fscache;
 #endif
@@ -573,6 +574,7 @@ struct cifs_fattr {
         u64             cf_uniqueid;
         u64             cf_eof;
         u64             cf_bytes;
+        u64             cf_createtime;
         uid_t           cf_uid;
         gid_t           cf_gid;
         umode_t         cf_mode;