On 9/2/22 17:23, Greg KH wrote:
On Fri, Sep 02, 2022 at 05:09:38PM +0800, Anand Jain wrote:
commit 770c79fb65506fc7c16459855c3839429f46cb32 upstream
Identifying and removing the stale device from the fs_uuids list is done
by btrfs_free_stale_devices(). btrfs_free_stale_devices() in turn
depends on device_path_matched() to check if the device appears in more
than one btrfs_device structure.
The matching of the device happens by its path, the device path. However,
when device mapper is in use, the dm device paths are nothing but a link
to the actual block device, which leads to the device_path_matched()
failing to match.
Fix this by matching the dev_t as provided by lookup_bdev() instead of
plain string compare of the device paths.
CC: stable@xxxxxxxxxxxxxxx #5.4
Reported-by: Josef Bacik <josef@xxxxxxxxxxxxxx>
Signed-off-by: Anand Jain <anand.jain@xxxxxxxxxx>
Signed-off-by: David Sterba <dsterba@xxxxxxxx>
---
fs/btrfs/volumes.c | 44 +++++++++++++++++++++++++++++++++++++-------
1 file changed, 37 insertions(+), 7 deletions(-)
What about the same change for 5.10.y?
Thanks for reminding me.
I have sent a separate patch for 5.10 as this patch won't apply to 5.10.
- Anand
thanks,
greg k-h
