1 files changed, 27 insertions, 1 deletions

diff --git a/fs/gfs2/ops_super.c b/fs/gfs2/ops_super.c
index b89999d3a767..485ce3d49923 100644
--- a/fs/gfs2/ops_super.c
+++ b/fs/gfs2/ops_super.c
@@ -284,6 +284,31 @@ static int gfs2_remount_fs(struct super_block *sb, int *flags, char *data)
 }
 
 /**
+ * gfs2_drop_inode - Drop an inode (test for remote unlink)
+ * @inode: The inode to drop
+ *
+ * If we've received a callback on an iopen lock then its because a
+ * remote node tried to deallocate the inode but failed due to this node
+ * still having the inode open. Here we mark the link count zero
+ * since we know that it must have reached zero if the GLF_DEMOTE flag
+ * is set on the iopen glock. If we didn't do a disk read since the
+ * remote node removed the final link then we might otherwise miss
+ * this event. This check ensures that this node will deallocate the
+ * inode's blocks, or alternatively pass the baton on to another
+ * node for later deallocation.
+ */
+static void gfs2_drop_inode(struct inode *inode)
+{
+        if (inode->i_private && inode->i_nlink) {
+                struct gfs2_inode *ip = GFS2_I(inode);
+                struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl;
+                if (gl && test_bit(GLF_DEMOTE, &gl->gl_flags))
+                        clear_nlink(inode);
+        }
+        generic_drop_inode(inode);
+}
+
+/**
  * gfs2_clear_inode - Deallocate an inode when VFS is done with it
  * @inode: The VFS inode
  *
@@ -441,7 +466,7 @@ out_unlock:
 out_uninit:
         gfs2_holder_uninit(&ip->i_iopen_gh);
         gfs2_glock_dq_uninit(&gh);
-        if (error)
+        if (error && error != GLR_TRYFAILED)
                 fs_warn(sdp, "gfs2_delete_inode: %d\n", error);
 out:
         truncate_inode_pages(&inode->i_data, 0);
@@ -481,6 +506,7 @@ const struct super_operations gfs2_super_ops = {
         .statfs                 = gfs2_statfs,
         .remount_fs             = gfs2_remount_fs,
         .clear_inode            = gfs2_clear_inode,
+        .drop_inode             = gfs2_drop_inode,
         .show_options           = gfs2_show_options,
 };