@@ -2711,6 +2711,9 @@ static int coroutine_fn bdrv_co_do_writev(BlockDriverState *bs,
if (bs->wr_highest_sector < sector_num + nb_sectors - 1) {
bs->wr_highest_sector = sector_num + nb_sectors - 1;
}
+ if (bs->growable && ret >= 0) {
+ bs->total_sectors = MAX(bs->total_sectors, sector_num + nb_sectors);
+ }
tracked_request_end(&req);
@@ -2785,7 +2788,7 @@ int64_t bdrv_getlength(BlockDriverState *bs)
if (!drv)
return -ENOMEDIUM;
- if (bs->growable || bdrv_dev_has_removable_media(bs)) {
+ if (bdrv_dev_has_removable_media(bs)) {
if (drv->bdrv_getlength) {
return drv->bdrv_getlength(bs);
}
If a BlockDriverState is growable, after every write we need to check if bs->total_sectors might have changed. With this change, bdrv_getlength does not need anymore a system call. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> --- block.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)