Date: Tue, 13 Dec 2005 23:18:06 GMT
From: Daniel Feenberg <feenberg@nber.org>
To: freebsd-gnats-submit@FreeBSD.org
Subject: kern/90368: pxeboot misses ${class} parameter when booting from dhcp (contrary to "man diskless")
Message-ID: <200512132318.jBDNI6fu013371@www.freebsd.org>
Resent-Message-ID: <200512132320.jBDNK32m014059@freefall.freebsd.org>
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>Number: 90368
>Category: kern
>Synopsis: pxeboot misses ${class} parameter when booting from dhcp (contrary to "man diskless")
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Tue Dec 13 23:20:03 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator: Daniel Feenberg
>Release: 6.0 RELEASE #0
>Organization:
National Bureau of Economic Research
>Environment:
FreeBSD agebulk2.nber.org 6.0-RELEASE FreeBSD 6.0-RELEASE #0: Thu Dec 1 05:39:4
2 UTC 2005 root@agestore2.nber.org:/usr/obj/usr/src/sys/GENERIC i386
>Description:
The man page for "diskless" describes using bootd or dhcpd to distribute to clients a class name which specifies certain files to override defaults in the client /etc and /var directories.
However, pxeboot does not support the bootp.kernel_cookie (T134) feature required for this to function with dhcp. Here is the relevant comment from net@freebsd.org by Doug White:
>How-To-Repeat:
See above.
>Fix:
I suppose the "bug" could be fixed by changing the documentation or the code but it would be a valuable feature if supported as documented.
>Release-Note:
>Audit-Trail:
>Unformatted:
>From my reading of the source, vendor-option 134 is only parsed by the
>nfsclient bootp code which is activated with the BOOTP kernel option. If
>you want to use that feature via PXE then pxe_open() in
>src/sys/boot/i386/libi386/pxe.c needs modification, specifically to parse
>the array in bootplayer.d.
>pxeboot passes its information via kenv and would require a bit of code
>hidden somewhere to convert it into a sysctl to maintain compatibility
>with the BOOTP feature.
>--
>Doug White | FreeBSD: The Power to Serve
>dwhite@gumbysoft.com
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