Re: [PATCH v8 15/20] fscrypt: add FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS ioctl

["Theodore Y. Ts'o" <tytso@xxxxxxx>]

On Mon, Aug 05, 2019 at 09:25:16AM -0700, Eric Biggers wrote:
> From: Eric Biggers <ebiggers@xxxxxxxxxx>
> 
> Add a root-only variant of the FS_IOC_REMOVE_ENCRYPTION_KEY ioctl which
> removes all users' claims of the key, not just the current user's claim.
> I.e., it always removes the key itself, no matter how many users have
> added it.
> 
> This is useful for forcing a directory to be locked, without having to
> figure out which user ID(s) the key was added under.  This is planned to
> be used by a command like 'sudo fscrypt lock DIR --all-users' in the
> fscrypt userspace tool (http://github.com/google/fscrypt).
> 
> Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx>

Looks good, thanks.   Feel free to add:

Reviewed-by: Theodore Ts'o <tytso@xxxxxxx>

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