From 792773b2255d25c6f5fe9dfa0ae200debab92de4 Mon Sep 17 00:00:00 2001 From: Jan Kiszka Date: Mon, 30 Nov 2009 20:34:55 +0100 Subject: [PATCH] block migration: Skip zero-sized disks No need to migrate emptiness (risking divide by zero later on). Signed-off-by: Jan Kiszka Signed-off-by: Anthony Liguori --- block-migration.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/block-migration.c b/block-migration.c index a066f19248..258a88afcc 100644 --- a/block-migration.c +++ b/block-migration.c @@ -222,6 +222,7 @@ static void init_blk_migration(Monitor *mon, QEMUFile *f) { BlkMigDevState *bmds; BlockDriverState *bs; + int64_t sectors; block_mig_state.submitted = 0; block_mig_state.read_done = 0; @@ -231,14 +232,19 @@ static void init_blk_migration(Monitor *mon, QEMUFile *f) for (bs = bdrv_first; bs != NULL; bs = bs->next) { if (bs->type == BDRV_TYPE_HD) { + sectors = bdrv_getlength(bs) >> BDRV_SECTOR_BITS; + if (sectors == 0) { + continue; + } + bmds = qemu_mallocz(sizeof(BlkMigDevState)); bmds->bs = bs; bmds->bulk_completed = 0; - bmds->total_sectors = bdrv_getlength(bs) >> BDRV_SECTOR_BITS; + bmds->total_sectors = sectors; bmds->completed_sectors = 0; bmds->shared_base = block_mig_state.shared_base; - block_mig_state.total_sector_sum += bmds->total_sectors; + block_mig_state.total_sector_sum += sectors; if (bmds->shared_base) { monitor_printf(mon, "Start migration for %s with shared base "