From mboxrd@z Thu Jan  1 00:00:00 1970
From: Al Viro <viro@zeniv.linux.org.uk>
Subject: Re: [PATCH 1/5] vfs: create a generic checking and prep function for
 FS_IOC_SETFLAGS
Date: Wed, 26 Jun 2019 05:02:02 +0100
Message-ID: <20190626040202.GA32272@ZenIV.linux.org.uk>
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To: "Darrick J. Wong" <darrick.wong@oracle.com>
Cc: matthew.garrett@nebula.com, yuchao0@huawei.com, tytso@mit.edu, shaggy@kernel.org, ard.biesheuvel@linaro.org, josef@toxicpanda.com, hch@infradead.org, clm@fb.com, adilger.kernel@dilger.ca, jk@ozlabs.org, jack@suse.com, dsterba@suse.com, jaegeuk@kernel.org, cluster-devel@redhat.com, jfs-discussion@lists.sourceforge.net, linux-efi@vger.kernel.org, Jan Kara <jack@suse.cz>, reiserfs-devel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-xfs@vger.kernel.org, linux-nilfs@vger.kernel.org, linux-mtd@lists.infradead.org, ocfs2-devel@oss.oracle.com, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, Christoph Hellwig <hch@lst.de>, linux-btrfs@vger.kernel.org

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...