Failed to lookup path for root 0

Failed to lookup path for root 0

[Russell Coker]

# btrfs subvol list /home
ERROR: Failed to lookup path for root 0 - No such file or directory
# btrfs subvol list /home
ID 269 gen 449406 top level 5 path backup
...

I'm getting errors from the "btrfs subvol list" command as above, I'm running 
the Debian 3.8.3 kernel.  The errors occur after deleting a snapshot, so if I 
delete a snapshot and then immediately do a list of snapshots then the error 
is likely to occur.  It's repeatable in my cron jobs to remove old backups, 
they do a snapshot list, delete the hourly backups, then do another list to 
find daily snapshots to delete which fails.

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Re: Failed to lookup path for root 0

[Wang Shilong]

Hello,
This problem has been fixed.Would you please try the latest btrfs-progs,
and see it this problem happens again.

Btrfs-progs commitid: 64edc851da59c47b92ee6830101be0854add7f09 fix this problem.
The latest btrfs-progs url:
http://git.kernel.org/cgit/linux/kernel/git/mason/btrfs-progs.git

Thanks,
Wang

> # btrfs subvol list /home
> ERROR: Failed to lookup path for root 0 - No such file or directory
> # btrfs subvol list /home
> ID 269 gen 449406 top level 5 path backup
> ...
> 
> I'm getting errors from the "btrfs subvol list" command as above, I'm running 
> the Debian 3.8.3 kernel.  The errors occur after deleting a snapshot, so if I 
> delete a snapshot and then immediately do a list of snapshots then the error 
> is likely to occur.  It's repeatable in my cron jobs to remove old backups, 
> they do a snapshot list, delete the hourly backups, then do another list to 
> find daily snapshots to delete which fails.
>