Abhi Das 3013317795 gfs2: fix quota refresh race in do_glock() ... quotad periodically syncs in-memory quotas to the ondisk quota file and sets the QDF_REFRESH flag so that a subsequent read of a synced quota is re-read from disk. gfs2_quota_lock() checks for this flag and sets a 'force' bit to force re-read from disk if requested. However, there is a race condition here. It is possible for gfs2_quota_lock() to find the QDF_REFRESH flag unset (i.e force=0) and quotad comes in immediately after and syncs the relevant quota and sets the QDF_REFRESH flag. gfs2_quota_lock() resumes with force=0 and uses the stale in-memory quota usage values that result in miscalculations. This patch fixes this race by moving the check for the QDF_REFRESH flag check further out into the gfs2_quota_lock() process, i.e, in do_glock(), under the protection of the quota glock. Signed-off-by: Abhi Das <adas@redhat.com> Signed-off-by: Bob Peterson <rpeterso@redhat.com> Acked-by: Steven Whitehouse <swhiteho@redhat.com>		2015-04-08 09:31:18 -05:00
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acl.c	GFS2: gfs2_set_acl(): Cache "no acl" as well	2015-03-18 12:41:57 -05:00
acl.h	GFS2: Increase the max number of ACLs	2014-03-19 15:16:24 +00:00
aops.c	gfs2: perform quota checks against allocation parameters	2015-03-18 12:46:54 -05:00
bmap.c	gfs2: perform quota checks against allocation parameters	2015-03-18 12:46:54 -05:00
bmap.h	GFS2: Clean up journal extent mapping	2014-03-03 13:50:12 +00:00
dentry.c	vfs: Remove unnecessary calls of check_submounts_and_drop	2014-10-09 02:38:56 -04:00
dir.c	VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry)	2015-02-22 11:38:41 -05:00
dir.h	GFS2: Make rename not save dirent location	2014-10-01 14:06:15 +01:00
export.c	vfs: make first argument of dir_context.actor typed	2014-10-31 17:48:54 -04:00
file.c	gfs2: allow fallocate to max out quotas/fs efficiently	2015-03-18 12:48:02 -05:00
gfs2.h	[GFS2] Remove remote lock dropping code	2008-06-27 09:39:44 +01:00
glock.c	gfs2: incorrect check for debugfs returns	2015-03-30 09:13:29 -05:00
glock.h	GFS2: Don't use ENOBUFS when ENOMEM is the correct error code	2014-01-16 10:31:13 +00:00
glops.c	GFS2: update freeze code to use freeze/thaw_super on all nodes	2014-11-17 10:36:39 +00:00
glops.h	GFS2: update freeze code to use freeze/thaw_super on all nodes	2014-11-17 10:36:39 +00:00
incore.h	gfs2: allow quota_check and inplace_reserve to return available blocks	2015-03-18 12:47:10 -05:00
inode.c	gfs2: perform quota checks against allocation parameters	2015-03-18 12:46:54 -05:00
inode.h	GFS2: Add atomic_open support	2013-06-14 11:17:15 +01:00
Kconfig	Finally eradicate CONFIG_HOTPLUG	2013-06-03 14:20:18 -07:00
lock_dlm.c	Merge branch 'sched/urgent' into sched/core, to merge fixes before applying new changes	2014-07-28 10:03:00 +02:00
log.c	GFS2: update freeze code to use freeze/thaw_super on all nodes	2014-11-17 10:36:39 +00:00
log.h	GFS2: remove transaction glock	2014-05-14 10:04:34 +01:00
lops.c	GFS2: lops.c: replace 0 by NULL for pointers	2014-04-28 09:41:55 +01:00
lops.h	GFS2: Move log buffer lists into transaction	2014-02-24 16:54:54 +00:00
main.c	GFS2: update freeze code to use freeze/thaw_super on all nodes	2014-11-17 10:36:39 +00:00
Makefile	GFS2: Rename ops_inode.c to inode.c	2011-05-10 13:12:49 +01:00
meta_io.c	mm: non-atomically mark page accessed during page cache allocation where possible	2014-06-04 16:54:10 -07:00
meta_io.h	GFS2: Fix address space from page function	2014-03-31 17:48:27 +01:00
ops_fstype.c	fs: remove mapping->backing_dev_info	2015-01-20 14:03:05 -07:00
quota.c	gfs2: fix quota refresh race in do_glock()	2015-04-08 09:31:18 -05:00
quota.h	gfs2: perform quota checks against allocation parameters	2015-03-18 12:46:54 -05:00
recovery.c	GFS2: fix sprintf format specifier	2015-01-13 10:48:57 +00:00
recovery.h	GFS2: Move recovery variables to journal structure in memory	2014-03-07 09:14:48 +00:00
rgrp.c	gfs2: allow quota_check and inplace_reserve to return available blocks	2015-03-18 12:47:10 -05:00
rgrp.h	gfs2: allow quota_check and inplace_reserve to return available blocks	2015-03-18 12:47:10 -05:00
super.c	fs: export inode_to_bdi and use it in favor of mapping->backing_dev_info	2015-01-20 14:03:04 -07:00
super.h	GFS2: update freeze code to use freeze/thaw_super on all nodes	2014-11-17 10:36:39 +00:00
sys.c	GFS2: fix sprintf format specifier	2015-01-13 10:48:57 +00:00
sys.h	GFS2: dlm based recovery coordination	2012-01-11 09:23:05 +00:00
trace_gfs2.h	GFS2: Add origin indicator to glock demote tracing	2013-04-10 10:32:05 +01:00
trans.c	GFS2: update freeze code to use freeze/thaw_super on all nodes	2014-11-17 10:36:39 +00:00
trans.h	GFS2: Split gfs2_trans_add_bh() into two	2013-01-29 10:28:04 +00:00
util.c	GFS2: Convert gfs2_lm_withdraw to use fs_err	2014-03-07 09:39:18 +00:00
util.h	GFS2: Convert gfs2_lm_withdraw to use fs_err	2014-03-07 09:39:18 +00:00
xattr.c	gfs2: perform quota checks against allocation parameters	2015-03-18 12:46:54 -05:00
xattr.h	sanitize xattr handler prototypes	2009-12-16 12:16:49 -05:00