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md: a few more bug fixes for 3.4 

2 are tagged for -stable, one being for a fairly serious bug
 that can corrupt metadata and make it hard to recovery an array.
 The other is for a more recent regression since 3.3
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Merge tag 'md-3.4-fixes' of git://neil.brown.name/md

Pull a few more md bug fixes from NeilBrown:
 "2 are tagged for -stable, one being for a fairly serious bug that can
  corrupt metadata and make it hard to recovery an array.  The other is
  for a more recent regression since 3.3"

* tag 'md-3.4-fixes' of git://neil.brown.name/md:
  md: fix possible corruption of array metadata on shutdown.
  md: don't call ->add_disk unless there is good reason.
  DM RAID: Use safe version of rdev_for_each
This commit is contained in:
Linus Torvalds 2012-04-23 18:25:01 -07:00
parent 721b024bd4 30b8aa9172
commit d2da626d6c
2 changed files with 6 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/md/dm-raid.c
View File

@ -859,7 +859,7 @@ static int analyse_superblocks(struct dm_target *ti, struct raid_set *rs)
int ret;
unsigned redundancy = 0;
struct raid_dev *dev;
struct md_rdev *rdev, *freshest;
struct md_rdev *rdev, *tmp, *freshest;
struct mddev *mddev = &rs->md;
switch (rs->raid_type->level) {
@ -877,7 +877,7 @@ static int analyse_superblocks(struct dm_target *ti, struct raid_set *rs)
}
freshest = NULL;
rdev_for_each(rdev, mddev) {
rdev_for_each_safe(rdev, tmp, mddev) {
if (!rdev->meta_bdev)
continue;

7
drivers/md/md.c
View File

@ -7560,14 +7560,14 @@ void md_check_recovery(struct mddev *mddev)
* any transients in the value of "sync_action".
*/
set_bit(MD_RECOVERY_RUNNING, &mddev->recovery);
clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
/* Clear some bits that don't mean anything, but
* might be left set
*/
clear_bit(MD_RECOVERY_INTR, &mddev->recovery);
clear_bit(MD_RECOVERY_DONE, &mddev->recovery);
if (test_bit(MD_RECOVERY_FROZEN, &mddev->recovery))
if (!test_and_clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery) ||
test_bit(MD_RECOVERY_FROZEN, &mddev->recovery))
goto unlock;
/* no recovery is running.
* remove any failed drives, then
@ -8140,7 +8140,8 @@ static int md_notify_reboot(struct notifier_block *this,
for_each_mddev(mddev, tmp) {
if (mddev_trylock(mddev)) {
__md_stop_writes(mddev);
if (mddev->pers)
__md_stop_writes(mddev);
mddev->safemode = 2;
mddev_unlock(mddev);
}