On Wed, May 16, 2018 at 05:09:27PM +0900, Tomohiro Misono wrote: > Deletion of a subvolume by rmdir(2) has become allowed by the > 'commit cd2decf640b1 ("btrfs: Allow rmdir(2) to delete an empty > subvolume")'. > > It is a kind of new feature and this commits add a sysfs entry > /sys/fs/btrfs/static_features/rmdir_subvol
> to indicate the availability of feature so that a user program > (e.g. xfstests) can detect it. > > Note that new sysfs directory "static_features" is created since a entry > in /sys/fs/btrfs/features depends on feature bits of superblock (in other > words, they may be different between each fs) and is not suitable to hold > the features which only depend on kernel version. New attribute_group > "btrfs_static_feature_attr_group" is created for this purpose. No, we don't want to add another directory for that, please use '/sys/fs/btrfs/features'. Listing in this directory reflects capabilities of the kernel module, the filesystem specific features are in the /sys/fs/btrfs/UUID/features directory. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html