Re: [PATCH 2/2] mdadm: remove journal with "remove-journal"

Song Liu [off-list ref] writes:

When journal device of an array fails, the array is forced into read-only
mode. To make the array normal without adding another journal device, we
need to remove journal _feature_ from the array.

This patch is the mdadm part of removing journal feature for an array with
failed or missing journal.

Two flags are added to GET_ARRAY_INFO:
  1. MD_SB_HAS_JOURNAL: meaning the array have journal feature;
  2. MD_SB_JOURNAL_REMOVABLE: meaning the journal is faulty or missing

When both flags are set, mdadm will use ioctl SET_ARRAY_INFO to clear
MD_SB_HAS_JOURNAL, and thus remove journal feature from the array.

Signed-off-by: Song Liu <redacted>
---
 Manage.c | 26 ++++++++++++++++++++++++++
 ReadMe.c |  1 +
 mdadm.c  |  9 ++++++++-
 mdadm.h  |  3 +++
 4 files changed, 38 insertions(+), 1 deletion(-)

Applied!

Thanks,
Jes