Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030333AbcJaTiM (ORCPT ); Mon, 31 Oct 2016 15:38:12 -0400 Received: from mx2.suse.de ([195.135.220.15]:38744 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S946002AbcJaTiF (ORCPT ); Mon, 31 Oct 2016 15:38:05 -0400 From: Hannes Reinecke To: Jens Axboe Cc: Christoph Hellwig , Alexander Graf , Ming@suse.de, "Lei Subject: [PATCHv3 0/4] loop: enable different physical blocksizes Date: Mon, 31 Oct 2016 20:37:15 +0100 Message-Id: <1477942639-109971-1-git-send-email-hare@suse.de> X-Mailer: git-send-email 1.8.5.6 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1071 Lines: 31 Currently the loop driver just simulates 512-byte blocks. When creating bootable images for virtual machines it might be required to use a different physical blocksize (eg 4k for S/390 DASD), as the some bootloaders (like lilo or zipl for S/390) need to know the physical block addresses of the kernel and initrd. This patchset extends the current LOOP_SET_STATUS64 ioctl to set the logical and physical blocksize by re-using the existing 'init' fields, which are currently unused. As usual, comments and reviews are welcome. Changes to v1: - Move LO_FLAGS_BLOCKSIZE definition - Reshuffle patches Changes to v2: - Include reviews from Ming Lei Hannes Reinecke (4): loop: Remove unused 'bdev' argument from loop_set_capacity loop: Enable correct physical blocksize loop: Add 'lo_logical_blocksize' loop: Pass logical blocksize in 'lo_init[0]' ioctl field drivers/block/loop.c | 40 +++++++++++++++++++++++++++++++++------- drivers/block/loop.h | 1 + include/uapi/linux/loop.h | 1 + 3 files changed, 35 insertions(+), 7 deletions(-) -- 2.6.6