NetBSD Problem Report #60251

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Date: Tue, 12 May 2026 13:19:55 +0000 (UTC)
From: thorpej@me.com
Reply-To: thorpej@me.com
To: gnats-bugs@NetBSD.org
Subject: getdiskbyname(3) relies on machine-specific declarations / parameters
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>Number:         60251
>Category:       lib
>Synopsis:       getdiskbyname(3) relies on machine-specific declarations / parameters
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    thorpej
>State:          open
>Class:          change-request
>Submitter-Id:   net
>Arrival-Date:   Tue May 12 13:20:00 +0000 2026
>Last-Modified:  Tue May 12 13:48:05 +0000 2026
>Originator:     Jason Thorpe
>Release:        NetBSD 11.99.6
>Organization:
Society for Aspiring Unix Grey-beards
>Environment:
NetBSD virt68k 11.99.6 NetBSD 11.99.6 (GENERIC) #89: Sun May 10 13:22:40 PDT 2026  thorpej@the-ripe-vessel:/home/nbsd/src/sys/arch/virt68k/compile/GENERIC virt68k

>Description:
getdiskbyname(3) relies on a fixed MAXPARTITIONS from <machine/disklabel.h> and is a barrier to a unified m68k user-land.

(It exists at all, really, but that's a different problem.)
>How-To-Repeat:
Attempt a build with a neutered <machine/disklabel.h>.
>Fix:
<sys/disklabel.h> should be changed to have a flexible array if MAXPARTITIONS is not defined, and getdiskbyname() should get the max partitions value from the running kernel and dynamically allocate storage for the singleton.

>Release-Note:

>Audit-Trail:

Responsible-Changed-From-To: lib-bug-people->thorpej
Responsible-Changed-By: thorpej@NetBSD.org
Responsible-Changed-When: Tue, 12 May 2026 13:48:05 +0000
Responsible-Changed-Why:
Take.


>Unformatted:

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