| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.19 095/158] btrfs: replace: drop assert for suspended replace | Date | Mon, 29 Aug 2022 12:59:05 +0200 |
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From: Anand Jain <anand.jain@oracle.com>
commit 59a3991984dbc1fc47e5651a265c5200bd85464e upstream.
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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- fs/btrfs/dev-replace.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
--- a/fs/btrfs/dev-replace.c +++ b/fs/btrfs/dev-replace.c @@ -1128,8 +1128,7 @@ int btrfs_dev_replace_cancel(struct btrf up_write(&dev_replace->rwsem); /* Scrub for replace must not be running in suspended state */ - ret = btrfs_scrub_cancel(fs_info); - ASSERT(ret != -ENOTCONN); + btrfs_scrub_cancel(fs_info); trans = btrfs_start_transaction(root, 0); if (IS_ERR(trans)) {
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