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block: vhdx - update log guid in header, and first write tracker

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Allow tracking of first file write in the VHDX image, as well as
the ability to update the GUID in the header.  This is in preparation
for log support.

Signed-off-by: Jeff Cody <jcody@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Jeff Cody 2013-10-30 10:44:43 -04:00 • committed by Stefan Hajnoczi
parent 0f48e8f097
commit c3906c5e82
2 changed files with 30 additions and 6 deletions
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6
block/vhdx.h
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@ -361,6 +361,7 @@ typedef struct BDRVVHDXState {
VHDXBatEntry *bat;
uint64_t bat_offset;
bool first_visible_write;
MSGUID session_guid;
VHDXLogEntries log;
@ -373,6 +374,9 @@ typedef struct BDRVVHDXState {
void vhdx_guid_generate(MSGUID *guid);
int vhdx_update_headers(BlockDriverState *bs, BDRVVHDXState *s, bool rw,
MSGUID *log_guid);
uint32_t vhdx_update_checksum(uint8_t *buf, size_t size, int crc_offset);
uint32_t vhdx_checksum_calc(uint32_t crc, uint8_t *buf, size_t size,
int crc_offset);
@ -402,4 +406,6 @@ void vhdx_log_data_le_export(VHDXLogDataSector *d);
void vhdx_log_entry_hdr_le_import(VHDXLogEntryHeader *hdr);
void vhdx_log_entry_hdr_le_export(VHDXLogEntryHeader *hdr);
int vhdx_user_visible_write(BlockDriverState *bs, BDRVVHDXState *s);
#endif