[GFS2] filesystem consistency error from do_strip
This patch fixes a GFS2 filesystem consistency error reported from
function do_strip. The problem was caused by a timing window
that allowed two vfs inodes to be created in memory that point
to the same file. The problem is fixed by making the vfs's
iget_test, iget_set mechanism check and set a new bit in the
in-core gfs2_inode structure while the vfs inode spin_lock is held.
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/ops_super.c b/fs/gfs2/ops_super.c
index 2278c68..0b7cc92 100644
--- a/fs/gfs2/ops_super.c
+++ b/fs/gfs2/ops_super.c
@@ -1,6 +1,6 @@
/*
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
- * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
+ * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
@@ -52,7 +52,7 @@
struct gfs2_inode *ip = GFS2_I(inode);
/* Check this is a "normal" inode */
- if (inode->i_private) {
+ if (test_bit(GIF_USER, &ip->i_flags)) {
if (current->flags & PF_MEMALLOC)
return 0;
if (sync)
@@ -297,8 +297,9 @@
*/
static void gfs2_drop_inode(struct inode *inode)
{
- if (inode->i_private && inode->i_nlink) {
- struct gfs2_inode *ip = GFS2_I(inode);
+ struct gfs2_inode *ip = GFS2_I(inode);
+
+ if (test_bit(GIF_USER, &ip->i_flags) && inode->i_nlink) {
struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl;
if (gl && test_bit(GLF_DEMOTE, &gl->gl_flags))
clear_nlink(inode);
@@ -314,12 +315,13 @@
static void gfs2_clear_inode(struct inode *inode)
{
+ struct gfs2_inode *ip = GFS2_I(inode);
+
/* This tells us its a "real" inode and not one which only
* serves to contain an address space (see rgrp.c, meta_io.c)
* which therefore doesn't have its own glocks.
*/
- if (inode->i_private) {
- struct gfs2_inode *ip = GFS2_I(inode);
+ if (test_bit(GIF_USER, &ip->i_flags)) {
ip->i_gl->gl_object = NULL;
gfs2_glock_schedule_for_reclaim(ip->i_gl);
gfs2_glock_put(ip->i_gl);
@@ -419,7 +421,7 @@
struct gfs2_holder gh;
int error;
- if (!inode->i_private)
+ if (!test_bit(GIF_USER, &ip->i_flags))
goto out;
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);