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backup: Use BlockBackend for I/O

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This changes the backup block job to use the job's BlockBackend for
performing its I/O. job->bs isn't used by the backup code any more
afterwards.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Kevin Wolf 2016-04-14 13:09:53 +02:00
parent 8543c27414
commit 5c438bc68c
5 changed files with 22 additions and 40 deletions
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4
blockdev.c
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@ -3293,8 +3293,8 @@ static void do_drive_backup(const char *device, const char *target,
backup_start(bs, target_bs, speed, sync, bmap,
on_source_error, on_target_error,
block_job_cb, bs, txn, &local_err);
bdrv_unref(target_bs);
if (local_err != NULL) {
bdrv_unref(target_bs);
error_propagate(errp, local_err);
goto out;
}
@ -3378,12 +3378,10 @@ void do_blockdev_backup(const char *device, const char *target,
}
target_bs = blk_bs(target_blk);
bdrv_ref(target_bs);
bdrv_set_aio_context(target_bs, aio_context);
backup_start(bs, target_bs, speed, sync, NULL, on_source_error,
on_target_error, block_job_cb, bs, txn, &local_err);
if (local_err != NULL) {
bdrv_unref(target_bs);
error_propagate(errp, local_err);
}
out: