* [PATCH 1/2] [block]: Make find_image_format() return 'raw' BlockDriver for SG_IO devices
@ 2010-05-17 16:45 ` Nicholas A. Bellinger
0 siblings, 0 replies; 2+ messages in thread
From: Nicholas A. Bellinger @ 2010-05-17 16:45 UTC (permalink / raw)
To: Kevin Wolf, Christoph Hellwig, Gerd Hoffmann, Hannes Reinecke,
kvm-devel, qemu-devel
Cc: Nicholas Bellinger
From: Nicholas Bellinger <nab@linux-iscsi.org>
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 <nab@linux-iscsi.org>
---
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
^ permalink raw reply related [flat|nested] 2+ messages in thread
* [Qemu-devel] [PATCH 1/2] [block]: Make find_image_format() return 'raw' BlockDriver for SG_IO devices
@ 2010-05-17 16:45 ` Nicholas A. Bellinger
0 siblings, 0 replies; 2+ messages in thread
From: Nicholas A. Bellinger @ 2010-05-17 16:45 UTC (permalink / raw)
To: Kevin Wolf, Christoph Hellwig, Gerd Hoffmann, Hannes Reinecke,
kvm-devel, qemu-devel
Cc: Nicholas Bellinger
From: Nicholas Bellinger <nab@linux-iscsi.org>
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 <nab@linux-iscsi.org>
---
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
^ permalink raw reply related [flat|nested] 2+ messages in thread
end of thread, other threads:[~2010-05-17 16:45 UTC | newest]
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2010-05-17 16:45 [PATCH 1/2] [block]: Make find_image_format() return 'raw' BlockDriver for SG_IO devices Nicholas A. Bellinger
2010-05-17 16:45 ` [Qemu-devel] " Nicholas A. Bellinger
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