From mboxrd@z Thu Jan  1 00:00:00 1970
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Wed, 26 Jun 2019 05:02:02 +0100
Subject: [Cluster-devel] [PATCH 1/5] vfs: create a generic checking and
 prep function for FS_IOC_SETFLAGS
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	<156151633004.2283456.4175543089138173586.stgit@magnolia>
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On Tue, Jun 25, 2019 at 07:32:10PM -0700, Darrick J. Wong wrote:
> From: Darrick J. Wong <darrick.wong@oracle.com>
> 
> Create a generic function to check incoming FS_IOC_SETFLAGS flag values
> and later prepare the inode for updates so that we can standardize the
> implementations that follow ext4's flag values.

Change in efivarfs behaviour deserves a note.  I'm not saying it's wrong,
but behaviour is changed there - no-op FS_IOC_SETFLAGS used to fail
without CAP_LINUX_IMMUTABLE...