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If the filesystem mounts with the replace-operation in a suspended state
and try to cancel the suspended replace-operation, we hit the assert. The
assert came from the commit fe97e2e173af ("btrfs: dev-replace: replace's
scrub must not be running in suspended state") that was actually not
required. So just remove it.
$ mount /dev/sda5 /btrfs
BTRFS info (device sda5): cannot continue dev_replace, tgtdev is missing
BTRFS info (device sda5): you may cancel the operation after 'mount -o degraded'
$ mount -o degraded /dev/sda5 /btrfs <-- success.
$ btrfs replace cancel /btrfs
kernel: assertion failed: ret != -ENOTCONN, in fs/btrfs/dev-replace.c:1131
kernel: ------------[ cut here ]------------
kernel: kernel BUG at fs/btrfs/ctree.h:3750!
After the patch:
$ btrfs replace cancel /btrfs
BTRFS info (device sda5): suspended dev_replace from /dev/sda5 (devid 1) to <missing disk> canceled
Fixes: fe97e2e173af ("btrfs: dev-replace: replace's scrub must not be running in suspended state")
CC: stable@vger.kernel.org # 5.0+
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
59a3991984