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block-migration: add reference to target DriveInfo

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So that ejection of attached device by guest does not free data
in use by block migration instance.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
CC: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Marcelo Tosatti 2011-01-26 12:12:33 -02:00 committed by Kevin Wolf
parent 84fb392526
commit f48905d44f
1 changed files with 3 additions and 0 deletions
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3
block-migration.c
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@ -19,6 +19,7 @@
#include "monitor.h"
#include "block-migration.h"
#include "migration.h"
#include "blockdev.h"
#include <assert.h>
#define BLOCK_SIZE (BDRV_SECTORS_PER_DIRTY_CHUNK << BDRV_SECTOR_BITS)
@ -299,6 +300,7 @@ static void init_blk_migration_it(void *opaque, BlockDriverState *bs)
bmds->completed_sectors = 0;
bmds->shared_base = block_mig_state.shared_base;
alloc_aio_bitmap(bmds);
drive_get_ref(drive_get_by_blockdev(bs));
block_mig_state.total_sector_sum += sectors;
@ -537,6 +539,7 @@ static void blk_mig_cleanup(Monitor *mon)
while ((bmds = QSIMPLEQ_FIRST(&block_mig_state.bmds_list)) != NULL) {
QSIMPLEQ_REMOVE_HEAD(&block_mig_state.bmds_list, entry);
drive_put_ref(drive_get_by_blockdev(bmds->bs));
qemu_free(bmds->aio_bitmap);
qemu_free(bmds);
}