projects/linux·commit af7eba01

Merge tag 'md/4.3-rc7-fixes' of git://neil.brown.name/md

af7eba01 · Linus Torvalds <[email protected]> · 2015-10-31 21:20:49 -07:00

Pull md bug fixes from Neil Brown:
 "Two more bug fixes for md.

  One bugfix for a list corruption in raid5 because of incorrect
  locking.

  Other for possible data corruption when a recovering device is failed,
  removed, and re-added.

  Both tagged for -stable"

* tag 'md/4.3-rc7-fixes' of git://neil.brown.name/md:
  Revert "md: allow a partially recovered device to be hot-added to an array."
  md/raid5: fix locking in handle_stripe_clean_event()
Commit
af7eba0158e9b4632dcd94c1cd4100689666e14f
Parents
d59ebbf1 · d01552a7

Merge commit. Changes below are compared with the first parent: d59ebbf1.

Changes

2 files changed · +5 −4

FileStatusAddDelContent
drivers/md/md.cmodified+1−2View file
drivers/md/raid5.cmodified+4−2View file

drivers/md/md.c

View file
diff --git a/drivers/md/md.c b/drivers/md/md.c
index c702de1..3fe3d04 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -8040,8 +8040,7 @@ static int remove_and_add_spares(struct mddev *mddev,
!test_bit(Bitmap_sync, &rdev->flags)))
continue;
- if (rdev->saved_raid_disk < 0)
- rdev->recovery_offset = 0;
+ rdev->recovery_offset = 0;
if (mddev->pers->
hot_add_disk(mddev, rdev) == 0) {
if (sysfs_link_rdev(mddev, rdev))

drivers/md/raid5.c

View file
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 49bb8d3..45933c1 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -3499,6 +3499,7 @@ returnbi:
}
if (!discard_pending &&
test_bit(R5_Discard, &sh->dev[sh->pd_idx].flags)) {
+ int hash;
clear_bit(R5_Discard, &sh->dev[sh->pd_idx].flags);
clear_bit(R5_UPTODATE, &sh->dev[sh->pd_idx].flags);
if (sh->qd_idx >= 0) {
@@ -3512,16 +3513,17 @@ returnbi:
* no updated data, so remove it from hash list and the stripe
* will be reinitialized
*/
- spin_lock_irq(&conf->device_lock);
unhash:
+ hash = sh->hash_lock_index;
+ spin_lock_irq(conf->hash_locks + hash);
remove_hash(sh);
+ spin_unlock_irq(conf->hash_locks + hash);
if (head_sh->batch_head) {
sh = list_first_entry(&sh->batch_list,
struct stripe_head, batch_list);
if (sh != head_sh)
goto unhash;
}
- spin_unlock_irq(&conf->device_lock);
sh = head_sh;
if (test_bit(STRIPE_SYNC_REQUESTED, &sh->state))