[CRIU] [PATCH 5/7] sk-unix: Don't fail if socket path lays on btrfs volume

[Cyrill Gorcunov]

On Wed, Dec 04, 2013 at 05:51:33PM +0400, Pavel Emelyanov wrote:
> 
> - if (st.st_dev != dev)
> + if (phys_stat_dev_match(st.st_dev, dev)
> 
> in all the places including ghosts and inotifies, where
> 
> bool phys_stat_dev_match(dev_t st_dev, dev_t phys_dev)
> {
> 	struct mount_info *mi;
> 
> 	if (st_dev == phys_dev)
> 		return true;
> 
> 	/*
> 	 * comment here about btrfs devs screwup
> 	 */
> 
> 	mi = lookup_mnt_sdev(phys_dev);
> 	if (!mi)
> 		/* no mountpoint with this device */
> 		return false;
> 
> 	if (strcmp(mi->kfstype, "btrfs"))
> 		/* not btrfs -- no match */
> 		return false;
> 
> 	if (!mi->private)
> 		btrfs_lazy_parse_subvol(mi);

btrfs_lazy_parse_subvol _may_ fail, and when it happens you
must exit out with error.

> 
> 	return is_btrfs_subvol(mi->private, st_dev);
> }
> 

	Cyrill