kern/49932: "bioctl <dev> show disks" vs. "bioctl <dev> show"

[he%uninett.no@localhost]

>Number:         49932
>Category:       kern
>Synopsis:       bioctl <dev> show disks vs. bioctl <dev> show
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue May 26 09:20:00 +0000 2015
>Originator:     Havard Eidnes
>Release:        NetBSD 7.0_BETA of April 29 2015
>Organization:
	UNINETT AS
>Environment:
System: NetBSD tos-res.uninett.no 7.0_BETA NetBSD 7.0_BETA (GENERIC) #0: Wed Apr 29 21:47:45 UTC 2015  he%tos-res.uninett.no@localhost:/usr/obj/sys/arch/amd64/compile/GENERIC amd64
Architecture: amd64
Machine: amd64
>Description:
	It looks like "bioctl <device> show disks" consistently
	returns an error:

# bioctl mfi0 show disks
 Disk Model/Serial                   Status       Size       Location
=====================================================================
bioctl: BIOCDISK_NOVOL: Invalid argument
#

	However, just "bioctl <device> show" lists both the logical
	volume and the disks:

# bioctl mfi0 show 
Volume Status       Size         Device/Label    Level Stripe
=============================================================
     0 Online       279G                mfi0    RAID 1    N/A  65535 seconds
   0:0 Online       279G         1:0.0 noencl <SEAGATE ST300MM0006     0003>
   0:1 Online       279G         1:1.0 noencl <SEAGATE ST300MM0006     0003>
# 


>How-To-Repeat:
	See above.

>Fix:
	By the looks of it, there's a missing handler for
	BIOCDISK_NOVOL in sys/dev/ic/mfi.c's mfi_ioctl() routine.