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migration: forbid bitmap migration by generated node-name 

It actually never worked with libvirt, as auto-generated names are
different on source and destination.

It's unsafe and useless to migrate by auto-generated node-names, so
let's forbid it.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200521220648.3255-7-vsementsov@virtuozzo.com>
[eblake: shorter subject line]
Signed-off-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2020-05-22 01:06:48 +03:00 committed by Eric Blake
parent 82640edb88
commit 4ff5cc121b
1 changed files with 7 additions and 0 deletions
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7
migration/block-dirty-bitmap.c
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@ -285,6 +285,13 @@ static int add_bitmaps_to_list(BlockDriverState *bs, const char *bs_name)
return -1;
}
if (bs_name[0] == '#') {
error_report("Bitmap '%s' in a node with auto-generated "
"name '%s' can't be migrated",
bdrv_dirty_bitmap_name(bitmap), bs_name);
return -1;
}
FOR_EACH_DIRTY_BITMAP(bs, bitmap) {
if (!bdrv_dirty_bitmap_name(bitmap)) {
continue;