Benjamin Marzinski 8b564a8e73 GFS2: Test bufdata with buffer locked and gfs2_log_lock held ... commit 96e5d1d3ad upstream. In gfs2_trans_add_bh(), gfs2 was testing if a there was a bd attached to the buffer without having the gfs2_log_lock held. It was then assuming it would stay attached for the rest of the function. However, without either the log lock being held of the buffer locked, __gfs2_ail_flush() could detach bd at any time. This patch moves the locking before the test. If there isn't a bd already attached, gfs2 can safely allocate one and attach it before locking. There is no way that the newly allocated bd could be on the ail list, and thus no way for __gfs2_ail_flush() to detach it. Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com> [bwh: Backported to 3.2: adjust context] Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2013-01-17 08:51:06 -08:00
..
acl.c	GFS2: We only need one ACL getting function	2011-11-23 13:31:51 +00:00
acl.h	fs: take the ACL checks to common code	2011-07-25 14:30:23 -04:00
aops.c	GFS2: Allow caching of rindex glock	2012-04-10 13:49:53 +01:00
bmap.c	GFS2: Make sure rindex is uptodate before starting transactions	2012-04-05 10:20:10 +01:00
bmap.h	GFS2: New truncate sequence	2010-09-20 11:18:16 +01:00
dentry.c	gfs2: fix d_revalidate oopsen on NFS exports	2011-03-10 03:44:48 -05:00
dir.c	GFS2: Make sure rindex is uptodate before starting transactions	2012-04-05 10:20:10 +01:00
dir.h	GFS2: Add readahead to sequential directory traversal	2011-11-08 09:52:12 +00:00
export.c	tmpfs,ceph,gfs2,isofs,reiserfs,xfs: fix fh_len checking	2012-10-21 09:27:57 -07:00
file.c	get rid of pointless includes of ext2_fs.h	2012-03-31 16:03:15 -04:00
gfs2.h	[GFS2] Remove remote lock dropping code	2008-06-27 09:39:44 +01:00
glock.c	GFS2: glock statistics gathering	2012-02-28 17:09:42 +00:00
glock.h	GFS2: dlm based recovery coordination	2012-01-11 09:23:05 +00:00
glops.c	filesystems: add set_nlink()	2011-11-02 12:53:43 +01:00
glops.h	GFS2: Fix AIL flush issue during fsync	2011-10-21 12:39:41 +01:00
incore.h	GFS2: Eliminate sd_rindex_mutex	2012-03-05 15:06:56 +00:00
inode.c	GFS2: Make sure rindex is uptodate before starting transactions	2012-04-05 10:20:10 +01:00
inode.h	GFS2: Use ->dirty_inode()	2011-10-21 12:39:26 +01:00
Kconfig	GFS2: use depends instead of select in kconfig	2012-03-26 09:18:02 +01:00
lock_dlm.c	GFS2: Instruct DLM to avoid queue convert slowdown	2012-04-24 13:26:50 +01:00
log.c	GFS2: Clean up log flush header writing	2012-03-09 14:07:06 +00:00
log.h	GFS2: Move two functions from log.c to lops.c	2012-02-28 17:09:59 +00:00
lops.c	GFS2: Test bufdata with buffer locked and gfs2_log_lock held	2013-01-17 08:51:06 -08:00
lops.h	[GFS2] Only do lo_incore_commit once	2008-03-31 10:39:54 +01:00
main.c	GFS2: Remove a __GFP_NOFAIL allocation	2012-03-08 12:10:23 +00:00
Makefile	GFS2: Rename ops_inode.c to inode.c	2011-05-10 13:12:49 +01:00
meta_io.c	GFS2: Fix up REQ flags	2011-11-08 09:51:53 +00:00
meta_io.h	GFS2: Remove unused macro	2011-04-20 09:00:24 +01:00
ops_fstype.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-nmw	2012-03-21 18:00:03 -07:00
quota.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-nmw	2012-03-21 18:00:03 -07:00
quota.h	vmscan: change shrinker API by passing shrink_control struct	2011-05-25 08:39:26 -07:00
recovery.c	GFS2: fail mount if journal recovery fails	2012-01-11 09:24:48 +00:00
recovery.h	gfs2: use workqueue instead of slow-work	2010-07-23 13:14:25 +02:00
rgrp.c	GFS2: Make sure rindex is uptodate before starting transactions	2012-04-05 10:20:10 +01:00
rgrp.h	GFS2: FITRIM ioctl support	2012-02-28 17:10:21 +00:00
super.c	GFS2: Flush pending glock work when evicting an inode	2012-03-07 10:43:02 +00:00
super.h	gfs: constify xattr_handler	2010-05-21 18:31:20 -04:00
sys.c	GFS2: dlm based recovery coordination	2012-01-11 09:23:05 +00:00
sys.h	GFS2: dlm based recovery coordination	2012-01-11 09:23:05 +00:00
trace_gfs2.h	GFS2: glock statistics gathering	2012-02-28 17:09:42 +00:00
trans.c	GFS2: Test bufdata with buffer locked and gfs2_log_lock held	2013-01-17 08:51:06 -08:00
trans.h	GFS2: decouple quota allocations from block allocations	2011-11-22 10:25:21 +00:00
util.c	GFS2: Remove a __GFP_NOFAIL allocation	2012-03-08 12:10:23 +00:00
util.h	GFS2: Remove a __GFP_NOFAIL allocation	2012-03-08 12:10:23 +00:00
xattr.c	GFS2: Make sure rindex is uptodate before starting transactions	2012-04-05 10:20:10 +01:00
xattr.h	sanitize xattr handler prototypes	2009-12-16 12:16:49 -05:00