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block: add bdrv_probe_device method

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Add a bdrv_probe_device method to all BlockDriver instances implementing
host devices to move matching of host device types into the actual drivers.
For now we keep exacly the old matching behaviour based on the devices names,
although we really should have better detetion methods based on device
information in the future.

Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Christoph Hellwig 2009-06-15 14:04:22 +02:00 • committed by Christoph Hellwig
parent f3a5d3f8a1
commit 508c7cb3fa
4 changed files with 74 additions and 32 deletions
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10
block/raw-win32.c
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@ -306,6 +306,15 @@ static int find_device_type(BlockDriverState *bs, const char *filename)
}
}
static int hdev_probe_device(const char *filename)
{
if (strstart(filename, "/dev/cdrom", NULL))
return 100;
if (is_windows_drive(filename))
return 100;
return 0;
}
static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
{
BDRVRawState *s = bs->opaque;
@ -391,6 +400,7 @@ static int raw_set_locked(BlockDriverState *bs, int locked)
static BlockDriver bdrv_host_device = {
.format_name = "host_device",
.instance_size = sizeof(BDRVRawState),
.bdrv_probe_device = hdev_probe_device,
.bdrv_open = hdev_open,
.bdrv_close = raw_close,
.bdrv_flush = raw_flush,