Commit db593f25 authored by Marcelo Tosatti's avatar Marcelo Tosatti Committed by Kevin Wolf
Browse files

Add flag to indicate external users to block device

Certain operations such as drive_del or resize cannot be performed
while external users (eg. block migration) reference the block device.

Add a flag to indicate that.
Signed-off-by: default avatarMarcelo Tosatti <>
Signed-off-by: default avatarKevin Wolf <>
parent f48905d4
......@@ -2774,6 +2774,17 @@ int64_t bdrv_get_dirty_count(BlockDriverState *bs)
return bs->dirty_count;
void bdrv_set_in_use(BlockDriverState *bs, int in_use)
assert(bs->in_use != in_use);
bs->in_use = in_use;
int bdrv_in_use(BlockDriverState *bs)
return bs->in_use;
int bdrv_img_create(const char *filename, const char *fmt,
const char *base_filename, const char *base_fmt,
char *options, uint64_t img_size, int flags)
......@@ -241,6 +241,8 @@ void bdrv_reset_dirty(BlockDriverState *bs, int64_t cur_sector,
int nr_sectors);
int64_t bdrv_get_dirty_count(BlockDriverState *bs);
void bdrv_set_in_use(BlockDriverState *bs, int in_use);
int bdrv_in_use(BlockDriverState *bs);
typedef enum {
......@@ -199,6 +199,7 @@ struct BlockDriverState {
char device_name[32];
unsigned long *dirty_bitmap;
int64_t dirty_count;
int in_use; /* users other than guest access, eg. block migration */
QTAILQ_ENTRY(BlockDriverState) list;
void *private;
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