APPLIED: [PATCH 0/1][SRU][Disco] shiftfs: allow changing ro/rw for

[Kleber Souza]

On 6/11/19 11:47 AM, Christian Brauner wrote:
> https://bugs.launchpad.net/bugs/1832316
> 
> SRU Justification
> 
> Impact: Stéphane reported regression for btrfs workloads employing shiftfs.
> Unprivileged users can already toggle whether a subvolume will be ro or
> rw. This is broken on current shiftfs as we haven't whitelisted these
> ioctls().
> 
> Fix: To enable this with shiftfs we need to whitelist BTRFS_IOC_FS_INFO,
> BTRFS_IOC_SUBVOL_GETFLAGS, BTRFS_IOC_SUBVOL_SETFLAGS. All of them should
> be safe for unprivileged users.
> 
> Regression Potential: Limited to shiftfs.
> 
> Test Case: Tested with LXD running shiftfs on top of btrfs and verified
> btrfs subvolumes can be made ro or rw.
> 
> Thanks,
> Christian
> 
> Christian Brauner (1):
>   UBUNTU: SAUCE: shiftfs: allow changing ro/rw for subvolumes
> 
>  fs/shiftfs.c | 21 ++++++++++++++++++---
>  1 file changed, 18 insertions(+), 3 deletions(-)
> 

Applied to disco/master-next branch.

Thanks,
Kleber