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[Qemu-devel] [PATCH 5/8] block: Make find_image_format() return 'raw' Bl
From: |
Kevin Wolf |
Subject: |
[Qemu-devel] [PATCH 5/8] block: Make find_image_format() return 'raw' BlockDriver for SG_IO devices |
Date: |
Thu, 20 May 2010 15:10:40 +0200 |
From: Nicholas Bellinger <address@hidden>
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 <address@hidden>
Signed-off-by: Kevin Wolf <address@hidden>
---
block.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/block.c b/block.c
index 89eece7..6a95768 100644
--- a/block.c
+++ b/block.c
@@ -329,6 +329,11 @@ 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) {
--
1.6.6.1
- [Qemu-devel] [PULL 0/8] Block patches, Kevin Wolf, 2010/05/20
- [Qemu-devel] [PATCH 2/8] virtio-blk: Avoid zeroing every request structure, Kevin Wolf, 2010/05/20
- [Qemu-devel] [PATCH 4/8] block: fix sector comparism in multiwrite_req_compare, Kevin Wolf, 2010/05/20
- [Qemu-devel] [PATCH 3/8] virtio-blk: fix barrier support, Kevin Wolf, 2010/05/20
- [Qemu-devel] [PATCH 1/8] block: fix aio_flush segfaults for read-only protocols (e.g. curl), Kevin Wolf, 2010/05/20
- [Qemu-devel] [PATCH 5/8] block: Make find_image_format() return 'raw' BlockDriver for SG_IO devices,
Kevin Wolf <=
- [Qemu-devel] [PATCH 6/8] block: Add SG_IO device check in refresh_total_sectors(), Kevin Wolf, 2010/05/20
- [Qemu-devel] [PATCH 8/8] vvfat: More build fixes with DEBUG, Kevin Wolf, 2010/05/20
- [Qemu-devel] [PATCH 7/8] vvfat: Fix compilation with DEBUG defined, Kevin Wolf, 2010/05/20