On 02/15/2017 05:05 AM, Markus Armbruster wrote:
> Block backends defined with "-drive if=T" with T other than "none" are
> meant to be picked up by machine initialization code: a suitable
> frontend gets created and wired up automatically.
>
> If machine initialization code doesn't comply, the block backend
> remains unused. This triggers a warning since commit a66c9dc, v2.2.0.
> Drives created by default are exempted; use -nodefaults to get rid of
> them.
>
> Turn this warning into an error.
>
> Signed-off-by: Markus Armbruster <armbru@redhat.com>
> ---
> blockdev.c | 14 +++++++-------
> include/sysemu/blockdev.h | 2 +-
> 2 files changed, 8 insertions(+), 8 deletions(-)
>
> diff --git a/blockdev.c b/blockdev.c
> index eb75f35..bbf9d4d 100644
> --- a/blockdev.c
> +++ b/blockdev.c
> @@ -227,30 +227,30 @@ DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit)
> return NULL;
> }
>
> -bool drive_check_orphaned(void)
> +void drive_check_orphaned(void)
> {
> BlockBackend *blk;
> DriveInfo *dinfo;
> Location loc;
> - bool rs = false;
> + bool orphans = false;
>
> for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
> dinfo = blk_legacy_dinfo(blk);
> - /* If dinfo->bdrv->dev is NULL, it has no device attached. */
> - /* Unless this is a default drive, this may be an oversight. */
> if (!blk_get_attached_dev(blk) && !dinfo->is_default &&
> dinfo->type != IF_NONE) {
> loc_push_none(&loc);
> qemu_opts_loc_restore(dinfo->opts);
> - error_report("warning: machine type does not support"
> + error_report("machine type does not support"
> " if=%s,bus=%d,unit=%d",
> if_name[dinfo->type], dinfo->bus, dinfo->unit);
> loc_pop(&loc);
> - rs = true;
> + orphans = true;
> }
> }
>
> - return rs;
> + if (orphans) {
> + exit(1);
> + }
> }
>
> DriveInfo *drive_get_by_index(BlockInterfaceType type, int index)
> diff --git a/include/sysemu/blockdev.h b/include/sysemu/blockdev.h
> index 351a039..ac22f2a 100644
> --- a/include/sysemu/blockdev.h
> +++ b/include/sysemu/blockdev.h
> @@ -48,7 +48,7 @@ BlockBackend *blk_by_legacy_dinfo(DriveInfo *dinfo);
> void override_max_devs(BlockInterfaceType type, int max_devs);
>
> DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit);
> -bool drive_check_orphaned(void);
> +void drive_check_orphaned(void);
> DriveInfo *drive_get_by_index(BlockInterfaceType type, int index);
> int drive_get_max_bus(BlockInterfaceType type);
> int drive_get_max_devs(BlockInterfaceType type);
>
6,7:
Reviewed-by: John Snow <jsnow@redhat.com>