diff options
| author | Kevin Wolf <kwolf@redhat.com> | 2014-11-20 16:27:11 +0100 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2014-12-10 10:31:12 +0100 |
| commit | 7cddd3728e964164e99c59e5c9443508d9ee0161 (patch) | |
| tree | fec4adc1f623e1b87851c59a819af623b2342664 /include | |
| parent | c6684249fd35f7e692bcf3039d2fc4b13dd32308 (diff) | |
block: Read only one sector for format probing
The only image format driver that even potentially accesses anything
after 512 bytes in its bdrv_probe() implementation is VMDK, which reads
a plain-text descriptor file. In practice, the field it's looking for
seems to come first and will be well within the first 512 bytes, too.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 1416497234-29880-7-git-send-email-kwolf@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/block/block_int.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/block/block_int.h b/include/block/block_int.h index a1c17b957..cd94559a6 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -57,6 +57,8 @@ #define BLOCK_OPT_REDUNDANCY "redundancy" #define BLOCK_OPT_NOCOW "nocow" +#define BLOCK_PROBE_BUF_SIZE 512 + typedef struct BdrvTrackedRequest { BlockDriverState *bs; int64_t offset; |