Re: [PATCH 1/5] vfs: create a generic checking and prep function for FS_IOC_SETFLAGS

[Al Viro <viro@xxxxxxxxxxxxxxxxxx>]

On Tue, Jun 25, 2019 at 07:32:10PM -0700, Darrick J. Wong wrote:
> From: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
> 
> 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...