[0/5] dm raid: deadlock/corruptor fixes

Message

Heinz Mauelshagen Sept. 5, 2018, 5:36 p.m. UTC

This series of raid patches critically fixes:
- a race causing hangs occuring on tiny devices
- a reshape deadlock / potential data corruption
- a superblock update problem rebuilding individual component devices

In addition, it contains (patches 4+5, less critical) removal
of code duplication deciphering the synchonization action and
avoids to create a bitmap when using a raid4/5/6 journal device.

Fixes pass all lvm2 raid tests.

Heinz Mauelshagen (5):
  dm-raid: fix reshape race on small devices
  dm-raid: fix stripe adding reshape deadlock
  dm-raid: correct explicit superblock update requests
  dm-raid: share decipher_sync_action
  dm-raid: disable bitmap when journaled

 Documentation/device-mapper/dm-raid.txt |   2 +
 drivers/md/dm-raid.c                    | 177 +++++++++---------------
 2 files changed, 71 insertions(+), 108 deletions(-)