]> git.baikalelectronics.ru Git - kernel.git/commit
Btrfs: skip submitting barrier for missing device
authorHidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Wed, 5 Feb 2014 07:34:38 +0000 (16:34 +0900)
committerJosef Bacik <jbacik@fb.com>
Mon, 10 Mar 2014 19:15:53 +0000 (15:15 -0400)
commitd665234a4b1181e7a38cc40843812a14573a0694
treeacaa54b48346b05a918041ddfd500417123b2cc5
parentd6455c1863a35c682b99a79f3a450c380e4a6b4f
Btrfs: skip submitting barrier for missing device

I got an error on v3.13:
 BTRFS error (device sdf1) in write_all_supers:3378: errno=-5 IO failure (errors while submitting device barriers.)

how to reproduce:
  > mkfs.btrfs -f -d raid1 /dev/sdf1 /dev/sdf2
  > wipefs -a /dev/sdf2
  > mount -o degraded /dev/sdf1 /mnt
  > btrfs balance start -f -sconvert=single -mconvert=single -dconvert=single /mnt

The reason of the error is that barrier_all_devices() failed to submit
barrier to the missing device.  However it is clear that we cannot do
anything on missing device, and also it is not necessary to care chunks
on the missing device.

This patch stops sending/waiting barrier if device is missing.

Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Josef Bacik <jbacik@fb.com>
fs/btrfs/disk-io.c