error:
DPRINTF("Error reading sector %" PRId64 "\n", sector);
- qemu_file_set_error(f, ret);
g_free(blk->buf);
g_free(blk);
- return 0;
+ return ret;
}
+/* return value:
+ * 0: too much data for max_downtime
+ * 1: few enough data for max_downtime
+*/
static int blk_mig_save_dirty_block(QEMUFile *f, int is_async)
{
BlkMigDevState *bmds;
- int ret = 0;
+ int ret = 1;
QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) {
- if (mig_save_device_dirty(f, bmds, is_async) == 0) {
- ret = 1;
+ ret = mig_save_device_dirty(f, bmds, is_async);
+ if (ret <= 0) {
break;
}
}
block_mig_state.bulk_completed = 1;
}
} else {
- if (blk_mig_save_dirty_block(f, 1) == 0) {
+ ret = blk_mig_save_dirty_block(f, 1);
+ if (ret != 0) {
/* no more dirty blocks */
break;
}
}
}
+ if (ret) {
+ blk_mig_cleanup();
+ return ret;
+ }
ret = flush_blks(f);
if (ret) {
all async read completed */
assert(block_mig_state.submitted == 0);
- while (blk_mig_save_dirty_block(f, 0) != 0) {
- /* Do nothing */
- }
- blk_mig_cleanup();
-
- /* report completion */
- qemu_put_be64(f, (100 << BDRV_SECTOR_BITS) | BLK_MIG_FLAG_PROGRESS);
+ do {
+ ret = blk_mig_save_dirty_block(f, 0);
+ } while (ret == 0);
- ret = qemu_file_get_error(f);
+ blk_mig_cleanup();
if (ret) {
return ret;
}
+ /* report completion */
+ qemu_put_be64(f, (100 << BDRV_SECTOR_BITS) | BLK_MIG_FLAG_PROGRESS);
DPRINTF("Block migration completed\n");