>From 3d858cb1070e746b58608d91da6dc3d48a568e06 Mon Sep 17 00:00:00 2001 From: Nicholas Bellinger Date: Sun, 16 May 2010 18:24:34 -0700 Subject: [PATCH 1/2] [block]: Make find_image_format() return 'raw' BlockDriver for SG_IO devices This patch adds a special BlockDriverState->sg check in block.c:find_image_format() after bdrv_file_open() -> block/raw-posix.c:hdev_open() has been called to determine if we are dealing with a Linux host scsi-generic device. The patch then returns the BlockDriver * from bdrv_find_format("raw"), skipping the subsequent bdrv_read() and rest of find_image_format(). Signed-off-by: Nicholas A. Bellinger --- block.c | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-) diff --git a/block.c b/block.c index 48305b7..f419ee6 100644 --- a/block.c +++ b/block.c @@ -332,6 +332,11 @@ static BlockDriver *find_image_format(const char *filename) ret = bdrv_file_open(&bs, filename, 0); if (ret < 0) return NULL; + + /* Return the raw BlockDriver * to scsi-generic devices */ + if (bs->sg) + return bdrv_find_format("raw"); + ret = bdrv_pread(bs, 0, buf, sizeof(buf)); bdrv_delete(bs); if (ret < 0) { -- 1.5.6.5