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2d786e66c9
All ublk commands(control, IO) should have taken ioctl command encoding from the beginning, because ioctl command encoding defines each code uniquely, so driver can figure out wrong command sent from userspace easily; 2) it might help security subsystem for audit uring cmd[1]. Unfortunately we didn't do that way, and it could be one lesson for ublk driver. So switch to ioctl command encoding now, we still support commands encoded in old way, but they become legacy definition. Any new command should take ioctl encoding. See ublksrv code for switching to ioctl command encoding in [2]. [1] https://lore.kernel.org/io-uring/CAHC9VhSVzujW9LOj5Km80AjU0EfAuukoLrxO6BEfnXeK_s6bAg@mail.gmail.com/ [2] https://github.com/ming1/ubdsrv/commits/ioctl_cmd_encoding Cc: Christoph Hellwig <hch@infradead.org> Cc: Ken Kurematsu <k.kurematsu@nskint.co.jp> Signed-off-by: Ming Lei <ming.lei@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20230418131810.855959-1-ming.lei@redhat.com Signed-off-by: Jens Axboe <axboe@kernel.dk> |
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