1 files changed, 31 insertions, 1 deletions

diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c
index cd805a66880d..9b8990444e6c 100644
--- a/fs/gfs2/bmap.c
+++ b/fs/gfs2/bmap.c
@@ -1085,6 +1085,33 @@ static int do_shrink(struct gfs2_inode *ip, u64 size)
         return error;
 }
 
+static int do_touch(struct gfs2_inode *ip, u64 size)
+{
+        struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
+        struct buffer_head *dibh;
+        int error;
+
+        error = gfs2_trans_begin(sdp, RES_DINODE, 0);
+        if (error)
+                return error;
+
+        down_write(&ip->i_rw_mutex);
+
+        error = gfs2_meta_inode_buffer(ip, &dibh);
+        if (error)
+                goto do_touch_out;
+
+        ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME;
+        gfs2_trans_add_bh(ip->i_gl, dibh, 1);
+        gfs2_dinode_out(ip, dibh->b_data);
+        brelse(dibh);
+
+do_touch_out:
+        up_write(&ip->i_rw_mutex);
+        gfs2_trans_end(sdp);
+        return error;
+}
+
 /**
  * gfs2_truncatei - make a file a given size
  * @ip: the inode
@@ -1105,8 +1132,11 @@ int gfs2_truncatei(struct gfs2_inode *ip, u64 size)
 
         if (size > ip->i_di.di_size)
                 error = do_grow(ip, size);
-        else
+        else if (size < ip->i_di.di_size)
                 error = do_shrink(ip, size);
+        else
+                /* update time stamps */
+                error = do_touch(ip, size);
 
         return error;
 }