Re: kern/53329: netboot over nfs broken

[Ryota Ozaki <ozaki-r%netbsd.org@localhost>]

The following reply was made to PR kern/53329; it has been noted by GNATS.

From: Ryota Ozaki <ozaki-r%netbsd.org@localhost>
To: "gnats-bugs%NetBSD.org@localhost" <gnats-bugs%netbsd.org@localhost>
Cc: kern-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost
Subject: Re: kern/53329: netboot over nfs broken
Date: Thu, 31 May 2018 11:46:19 +0900

 On Wed, May 30, 2018 at 1:05 AM <prlw1%cam.ac.uk@localhost> wrote:
 >
 > >Number:         53329
 > >Category:       kern
 > >Synopsis:       netboot over nfs broken
 > >Confidential:   no
 > >Severity:       serious
 > >Priority:       medium
 > >Responsible:    kern-bug-people
 > >State:          open
 > >Class:          sw-bug
 > >Submitter-Id:   net
 > >Arrival-Date:   Tue May 29 16:05:00 +0000 2018
 > >Originator:     Patrick Welche
 > >Release:        NetBSD-8.99.19/amd64
 > >Organization:
 > >Environment:
 > >Description:
 > Netbooting no longer works. Tried 2 new boxes (one last week with 8.99.17) and one today, so tried my known-to-have-netbooted-successfully-in-the-past laptop, and in all cases (alc0, wm0, wm0), "cannot mount root, error = 79".
 >
 > The kernel is loaded and started over nfs, not tftp, so I believe that dhcpd and nfsd on a 8.99.19 server are working correctly.
 >
 > What is new is:
 >
 > nfs_boot: trying DHCP/BOOTP
 > nfs_boot: timeout...
 > nfs_boot: timeout...
 > nfs_boot: timeout...
 >
 > The server sees at most 2 requests. One presumably is the successful dhcp request before tftp get pxeboot_ia32.bin.
 
 I suspect the recent switch of the default transport to TCP.
 If so adding NFS_BOOT_UDP to your kernel would fix the issue.
 
   ozaki-r