If blk_getlength() fails in virtio_blk_update_config() consider the disk
image length to be 0 bytes.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Message-id:
20170808122251.29815-1-stefanha@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
BlockConf *conf = &s->conf.conf;
struct virtio_blk_config blkcfg;
uint64_t capacity;
+ int64_t length;
int blk_size = conf->logical_block_size;
blk_get_geometry(s->blk, &capacity);
* divided by 512 - instead it is the amount of blk_size blocks
* per track (cylinder).
*/
- if (blk_getlength(s->blk) / conf->heads / conf->secs % blk_size) {
+ length = blk_getlength(s->blk);
+ if (length > 0 && length / conf->heads / conf->secs % blk_size) {
blkcfg.geometry.sectors = conf->secs & ~s->sector_mask;
} else {
blkcfg.geometry.sectors = conf->secs;