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Add flag to indicate external users to block device

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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: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Marcelo Tosatti
2011-01-26 12:12:34 -02:00
committed by Kevin Wolf
parent f48905d44f
commit db593f2565
3 changed files with 14 additions and 0 deletions
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block_int.h
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@@ -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;
};