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block: tell drivers about an image resize

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Extend the change_cb callback with a reason argument, and use it
to tell drivers about size changes.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Christoph Hellwig 2011-01-24 13:32:41 +01:00 • committed by Kevin Wolf
parent 6d4a2b3a47
commit db97ee6a97
5 changed files with 25 additions and 8 deletions
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5
block_int.h
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@ -153,7 +153,7 @@ struct BlockDriverState {
int valid_key; /* if true, a valid encryption key has been set */
int sg; /* if true, the device is a /dev/sg* */
/* event callback when inserting/removing */
void (*change_cb)(void *opaque);
void (*change_cb)(void *opaque, int reason);
void *change_opaque;
BlockDriver *drv; /* NULL means no media */
@ -203,6 +203,9 @@ struct BlockDriverState {
void *private;
};
#define CHANGE_MEDIA 0x01
#define CHANGE_SIZE 0x02
struct BlockDriverAIOCB {
AIOPool *pool;
BlockDriverState *bs;