Re: [PATCH] super1: make write_bitmap1 compatible with previous mdadm versions

[Jes Sorensen <Jes.Sorensen@redhat.com>]

Guoqing Jiang <gqjiang@suse.com> writes:
> For older mdadm version, v1.x metadata has different bitmap_offset,
> we can't ensure all the bitmaps are on a 4K boundary since writing
> 4K for bitmap could corrupt the superblock, and Anthony reported
> the bug about it at below link.
>
> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=837964
>
> So let's check about the alignment for bitmap_offset before set
> the boundary to 4096 unconditionally. Thanks for Neil's detailed
> explanation.
>
> Reported-by: Anthony DeRobertis <anthony@derobert.net>
> Fixes: 95a05b37e8eb ("Create n bitmaps for clustered mode")
> Cc: Neil Brown <neilb@suse.com>
> Signed-off-by: Guoqing Jiang <gqjiang@suse.com>
> ---
>  super1.c | 10 +++++++++-
>  1 file changed, 9 insertions(+), 1 deletion(-)

Applied!

Thanks,
Jes