as of now, when we replace a disk, it is added to the
dev list with devid 0. And we fail to obtain details
of devid 0 because we don't query devid 0 at all.
reproducer:
btrfs rep start /dev/sdb /dev/sdf /btrfs
btrfs fi show
Label: none uuid:
f8fb9819-16c8-47b7-b62f-
0ff90f8c56cd
Total devices 3 FS bytes used 1.94GiB
devid 1 size 1.10GiB used 1.10GiB path /dev/sdb
devid 2 size 1.10GiB used 1.08GiB path /dev/sdc
devid 0 size 0.00 used 0.00 path
this patch will make it proper by querying devid 0.
btrfs repl start /dev/sdb /dev/sdf /btrfs
btrfs fi show /btrfs
Label: none uuid:
f8fb9819-16c8-47b7-b62f-
0ff90f8c56cd
Total devices 3 FS bytes used 1.94GiB
devid 0 size 1.10GiB used 1.10GiB path /dev/sdf
devid 1 size 1.10GiB used 1.10GiB path /dev/sdb
devid 2 size 1.10GiB used 1.08GiB path /dev/sdc
Its fine to query devid 0 when there is no replace
activity as well, because we just skip the error ENODEV
btrfs fi show /btrfs
Label: none uuid:
f8fb9819-16c8-47b7-b62f-
0ff90f8c56cd
Total devices 2 FS bytes used 1.94GiB
devid 1 size 1.10GiB used 1.10GiB path /dev/sdf
devid 2 size 1.10GiB used 1.08GiB path /dev/sdc
Signed-off-by: Anand Jain <Anand.Jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>