[PATCH v2 0/2] btrfs: sysfs: Add entry which shows rmdir(2) can work for subvolume

From: Tomohiro Misono <misono.tomohiro@jp.fujitsu.com>
To: <linux-btrfs@vger.kernel.org>
Subject: [PATCH v2 0/2] btrfs: sysfs: Add entry which shows rmdir(2) can work for subvolume
Date: Wed, 16 May 2018 17:09:25 +0900	[thread overview]
Message-ID: <cover.1526457206.git.misono.tomohiro@jp.fujitsu.com> (raw)

[based on current misc-next]

-----
changelog
  v1 -> v2
    - Explicitly set start of enum btrfs_feature_set as 0 in 1st patch
    - Create new sysfs group which shows static feature (i.e. features
      which only depends on kernel version). See 2nd path.
-----

This adds new sysfs entry
  /sys/fs/btrfs/static_features/rmdir_subvol
to indicate that the kernel can delete a subvolume by rmdir(2),
which is allowed by: https://www.spinics.net/lists/linux-btrfs/msg76938.html

The aim of adding a entry is to enable a user program (e.g. xfstest)
to detect a feature.

The first patch is a cleanup and the second one is a main part.

Tomohiro Misono (2):
  btrfs: sysfs: Use enum/define value intead of magic number
  btrfs: sysfs: Add entry which shows rmdir(2) can work for subvolume

 fs/btrfs/sysfs.c | 40 +++++++++++++++++++++++++++++++++++-----
 fs/btrfs/sysfs.h |  4 ++--
 2 files changed, 37 insertions(+), 7 deletions(-)

-- 
2.14.3