This patch is part of the Fast Virtual Disk (FVD) proposal.
See http://wiki.qemu.org/Features/FVD.
This patch adds FVD's implementation of the bdrv_probe() interface.
Signed-off-by: Chunqiang Tang <ct...@us.ibm.com>
---
block/fvd-misc.c | 9 ++++++++-
1 files changed, 8 insertions(+), 1 deletions(-)
diff --git a/block/fvd-misc.c b/block/fvd-misc.c
index 61e39bb..6315218 100644
--- a/block/fvd-misc.c
+++ b/block/fvd-misc.c
@@ -163,7 +163,14 @@ static void fvd_close(BlockDriverState * bs)
static int fvd_probe(const uint8_t * buf, int buf_size, const char *filename)
{
- return 0;
+ const FvdHeader *header = (const void *)buf;
+
+ if (buf_size >= sizeof(uint32_t) &&
+ le32_to_cpu(header->magic) == FVD_MAGIC) {
+ return 100;
+ } else {
+ return 0;
+ }
}
static int fvd_is_allocated(BlockDriverState * bs, int64_t sector_num,
--
1.7.0.4
