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block migration: Activate image on destination before writing to it

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When using 'migrate -b', we must make sure to take ownership of the
image before writing to it. Otherwise metadata would be thrown away on
migration completion; this was caught by the assertions introduced in
commit 09e0c771.

Reported-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2016-02-22 10:21:15 +01:00
parent a513416ecf
commit 9bd9c7f5b5
1 changed files with 7 additions and 0 deletions
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7
migration/block.c
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@ -786,6 +786,7 @@ static int block_load(QEMUFile *f, void *opaque, int version_id)
int64_t addr;
BlockDriverState *bs, *bs_prev = NULL;
BlockBackend *blk;
Error *local_err = NULL;
uint8_t *buf;
int64_t total_sectors = 0;
int nr_sectors;
@ -824,6 +825,12 @@ static int block_load(QEMUFile *f, void *opaque, int version_id)
device_name);
return -EINVAL;
}
bdrv_invalidate_cache(bs, &local_err);
if (local_err) {
error_report_err(local_err);
return -EINVAL;
}
}
if (total_sectors - addr < BDRV_SECTORS_PER_DIRTY_CHUNK) {