Revert "GFS2: Fix use-after-free bug on umount"
This reverts commit 78802499912f1ba31ce83a94c55b5a980f250a43.
The original patch is causing problems in relation to order of
operations at umount in relation to jdata files. I need to fix
this a different way.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/ops_super.c b/fs/gfs2/ops_super.c
index bd08a0a..08837a7 100644
--- a/fs/gfs2/ops_super.c
+++ b/fs/gfs2/ops_super.c
@@ -95,7 +95,7 @@
* Returns: errno
*/
-int gfs2_make_fs_ro(struct gfs2_sbd *sdp)
+static int gfs2_make_fs_ro(struct gfs2_sbd *sdp)
{
struct gfs2_holder t_gh;
int error;
@@ -122,6 +122,70 @@
}
/**
+ * gfs2_put_super - Unmount the filesystem
+ * @sb: The VFS superblock
+ *
+ */
+
+static void gfs2_put_super(struct super_block *sb)
+{
+ struct gfs2_sbd *sdp = sb->s_fs_info;
+ int error;
+
+ /* Unfreeze the filesystem, if we need to */
+
+ mutex_lock(&sdp->sd_freeze_lock);
+ if (sdp->sd_freeze_count)
+ gfs2_glock_dq_uninit(&sdp->sd_freeze_gh);
+ mutex_unlock(&sdp->sd_freeze_lock);
+
+ kthread_stop(sdp->sd_quotad_process);
+ kthread_stop(sdp->sd_logd_process);
+ kthread_stop(sdp->sd_recoverd_process);
+
+ if (!(sb->s_flags & MS_RDONLY)) {
+ error = gfs2_make_fs_ro(sdp);
+ if (error)
+ gfs2_io_error(sdp);
+ }
+ /* At this point, we're through modifying the disk */
+
+ /* Release stuff */
+
+ iput(sdp->sd_jindex);
+ iput(sdp->sd_inum_inode);
+ iput(sdp->sd_statfs_inode);
+ iput(sdp->sd_rindex);
+ iput(sdp->sd_quota_inode);
+
+ gfs2_glock_put(sdp->sd_rename_gl);
+ gfs2_glock_put(sdp->sd_trans_gl);
+
+ if (!sdp->sd_args.ar_spectator) {
+ gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
+ gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
+ gfs2_glock_dq_uninit(&sdp->sd_ir_gh);
+ gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
+ gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
+ iput(sdp->sd_ir_inode);
+ iput(sdp->sd_sc_inode);
+ iput(sdp->sd_qc_inode);
+ }
+
+ gfs2_glock_dq_uninit(&sdp->sd_live_gh);
+ gfs2_clear_rgrpd(sdp);
+ gfs2_jindex_free(sdp);
+ /* Take apart glock structures and buffer lists */
+ gfs2_gl_hash_clear(sdp);
+ /* Unmount the locking protocol */
+ gfs2_lm_unmount(sdp);
+
+ /* At this point, we're through participating in the lockspace */
+ gfs2_sys_fs_del(sdp);
+ kfree(sdp);
+}
+
+/**
* gfs2_write_super
* @sb: the superblock
*
@@ -622,7 +686,7 @@
.destroy_inode = gfs2_destroy_inode,
.write_inode = gfs2_write_inode,
.delete_inode = gfs2_delete_inode,
- .put_super = gfs2_gl_hash_clear,
+ .put_super = gfs2_put_super,
.write_super = gfs2_write_super,
.sync_fs = gfs2_sync_fs,
.write_super_lockfs = gfs2_write_super_lockfs,