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blockdev: Make orphaned -drive fatal 

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>
Message-Id: <1487153147-11530-8-git-send-email-armbru@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
This commit is contained in:
Markus Armbruster 2017-02-15 11:05:46 +01:00
parent 664cc623bf
commit 720b8dc052
2 changed files with 8 additions and 8 deletions
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14
blockdev.c
View File

@ -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)

2
include/sysemu/blockdev.h
View File

@ -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);