dm raid: be prepared to accept arbitrary '- -' tuples
authorHeinz Mauelshagen <heinzm@redhat.com>
Sat, 14 Jan 2017 02:53:08 +0000 (03:53 +0100)
committerMike Snitzer <snitzer@redhat.com>
Wed, 25 Jan 2017 11:49:06 +0000 (12:49 +0100)
commit50c4feb9a3e3df9574d952a4ed2f009f8135e4c7
treeed2c28382adcf71e3969f2f1ac256112e7e519c5
parentc63ede3b4211e1e2489eda6a2efb0eb6fa26483a
dm raid: be prepared to accept arbitrary '- -' tuples

During raid set resize checks and setting up the recovery offset in case a raid
set grows, calculated rd->md.dev_sectors is compared to rs->dev[0].rdev.sectors.

Device 0 may not be defined in case userspace passes in '- -' for it
(lvm2 doesn't do that so far), thus it's device sectors can't be taken
authoritatively in this comparison and another valid device must be used
to retrieve the device size.

Use mddev->dev_sectors in checking for ongoing recovery for the same reason.

Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
drivers/md/dm-raid.c