[PATCH v3 0/3] Improve failed arrays handling.

[Mariusz Tkaczyk <mariusz.tkaczyk@linux.intel.com>]

Hi Song,
I've made changes as discussed in v2[1]. I did manual testing with IMSM
metadata.

Patch 1:
- "%pg" propagated and raid0/linear_error refactored as Suggested by Guoqing.
- missed dm-event, suggested by Guoqing- verified. IMO the behavior is same as
  before.

Patch 2:
- Commit id fixed, suggested by Gouqing.
- Description rework, suggested by Xiao (discussed offline).
- fail_last_dev handling added (and verified).
- MD_BROKEN description modified, suggested by Gouqing.
- Descriptions for raid1_error and raid10_error are added, redundant comments
  are removed.

Patch3:
- Error message for failed array changed, suggested by you.
- MD_BROKEN setter moved to has_failed(), suggested by Gouqing.
- has_failed() refactored

Other notes:
I followed kernel-doc style guidelines when editing or adding new descriptions.
Please let me know if you consider it as unnecessary and messy.

I also noticed potential issue during refactor related to MD_FAILFAST_SUPPORTED,
please see the flag definition. I'm wondering if fail_last_dev functionality is
not against failfast. Should I start separate thread for that?

[1] https://lore.kernel.org/linux-raid/CAPhsuW43QfDNGEu72o2_eqDZ5vGq3tbFvdZ-W+dxVqcEhHmJ5w@mail.gmail.com/T/#t

Mariusz Tkaczyk (3):
  raid0, linear, md: add error_handlers for raid0 and linear
  md: Set MD_BROKEN for RAID1 and RAID10
  raid5: introduce MD_BROKEN

 drivers/md/md-linear.c | 15 ++++++++-
 drivers/md/md.c        | 23 +++++++++-----
 drivers/md/md.h        | 72 ++++++++++++++++++++++--------------------
 drivers/md/raid0.c     | 15 ++++++++-
 drivers/md/raid1.c     | 42 ++++++++++++++----------
 drivers/md/raid10.c    | 33 ++++++++++++-------
 drivers/md/raid5.c     | 49 ++++++++++++++--------------
 7 files changed, 151 insertions(+), 98 deletions(-)

-- 
2.26.2