Date: Thu, 30 May 2002 14:22:58 -0700 (PDT) From: Tim Kientzle <kientzle@acm.org> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/38749: Diskless booting fails with some DHCP servers (no root path) Message-ID: <200205302122.g4ULMwBe036165@www.freebsd.org>
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>Number: 38749
>Category: kern
>Synopsis: Diskless booting fails with some DHCP servers (no root path)
>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: Thu May 30 14:30:01 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator: Tim Kientzle
>Release: 4.3-RELEASE
>Organization:
>Environment:
FreeBSD ugly.kientzle.com 4.3-RELEASE FreeBSD 4.3-RELEASE #1: Sat Mar 30 13:36:28 PST 2002 tim@ugly.kientzle.com:/usr/src/sys/compile/UGLY i386
>Description:
I'm using the DHCP server built into an Extreme Networks DSL
router. This DHCP server does not provide any options that
aren't explicitly requested by the client. In particular,
a diskless client will not receive the ROOT PATH option,
which prevents it from booting.
>How-To-Repeat:
Boot a diskless FreeBSD client using an anemic DHCP server.
>Fix:
Modify sys/nfs/bootp_subr.c to explicitly request a ROOT PATH
option from the DHCP server. This file seems not to have changed
between 4.3-RELEASE and 4.5-RELEASE:
*** sys/nfs/bootp_subr.c Tue Feb 13 14:33:44 2001
--- /usr/src-4.3/sys/nfs/bootp_subr.c Wed May 29 10:01:26 2002
***************
*** 1390,1395 ****
--- 1390,1398 ----
default:
;
}
+ *vendp++ = 55; /* Parameter request list */
+ *vendp++ = 1; /* 1 parameter requested */
+ *vendp++ = 17; /* I need a "Root Path" in the reply */
*vendp = TAG_END;
ifctx->call.secs = 0;
>Release-Note:
>Audit-Trail:
>Unformatted:
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