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imsm: Set disk slot number 

If first disk of IMSM RAID1 is failed but still present in the system,
the array is not auto-assembled. Auto-assemble uses raid disk slot from
metadata to index disks. As it's not set, the valid disk is seen as a
replacement disk and its metadata is ignored. The problem is not
observed for other RAID levels as they have more than 2 disks -
replacement disks are only stored under uneven indexes so third disk
metadata is used in such scenario.

Signed-off-by: Mariusz Tkaczyk <mariusz.tkaczyk@intel.com>
Reviewed-by: Tomasz Majchrzak <tomasz.majchrzak@intel.com>
Signed-off-by: Jes Sorensen <jsorensen@fb.com>
This commit is contained in:
Mariusz Tkaczyk 2017-10-03 14:49:49 +02:00 committed by Jes Sorensen
parent 358ef9bfdd
commit 20dc76d15b
1 changed files with 3 additions and 0 deletions
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3
super-intel.c
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@ -3502,6 +3502,9 @@ static void getinfo_super_imsm(struct supertype *st, struct mdinfo *info, char *
__u32 ord = get_imsm_ord_tbl_ent(dev, j, MAP_0);
__u32 idx = ord_to_idx(ord);
if (super->disks && super->disks->index == (int)idx)
info->disk.raid_disk = j;
if (!(ord & IMSM_ORD_REBUILD) &&
get_imsm_missing(super, idx)) {
missing = 1;