NFS root on 2.4.18-14

NFS root on 2.4.18-14

[Theewara Vorakosit]

Dear All,
    I use Red Hat 8.0 and kernel 2.4.18-14, which come from redhat
distribution. I want create a NFS-root kernel to build a diskless linux
using NFS root. I select "IP kernel level configuration-> BOOTP, DHCP",
NFS root support. I boot client using my kernel, it does not requrest for
an IP address. It try to mount NFS root immediately. Do I forget
something?
Thanks,
Theewara

Re: NFS root on 2.4.18-14

[Andreas Steinmetz]

[-- Attachment #1: Type: text/plain, Size: 691 bytes --]

Theewara Vorakosit wrote:
> Dear All,
>     I use Red Hat 8.0 and kernel 2.4.18-14, which come from redhat
> distribution. I want create a NFS-root kernel to build a diskless linux
> using NFS root. I select "IP kernel level configuration-> BOOTP, DHCP",
> NFS root support. I boot client using my kernel, it does not requrest for
> an IP address. It try to mount NFS root immediately. Do I forget
> something?
If you try to boot from a floppy that was created like "dd if=vmlinuz 
of=/dev/fd0" you will need the attached patch. Alan Cox however told me 
that the ability to boot without boot manager (e.g. lilo) will 
eventually go away.
-- 
Andreas Steinmetz
D.O.M. Datenverarbeitung GmbH

[-- Attachment #2: ip.patch --]
[-- Type: text/plain, Size: 490 bytes --]

diff -rNu linux/net/ipv4/ipconfig.c linux-custom/net/ipv4/ipconfig.c
--- linux/net/ipv4/ipconfig.c	2002-09-27 14:05:32.000000000 +0200
+++ linux-custom/net/ipv4/ipconfig.c	2002-09-27 14:57:01.000000000 +0200
@@ -107,7 +107,7 @@
  */
 int ic_set_manually __initdata = 0;		/* IPconfig parameters set manually */
 
-int ic_enable __initdata = 0;			/* IP config enabled? */
+int ic_enable __initdata = 1;			/* IP config enabled? */
 
 /* Protocol choice */
 int ic_proto_enabled __initdata = 0

Re: NFS root on 2.4.18-14

[Wakko Warner]

> >     I use Red Hat 8.0 and kernel 2.4.18-14, which come from redhat
> > distribution. I want create a NFS-root kernel to build a diskless linux
> > using NFS root. I select "IP kernel level configuration-> BOOTP, DHCP",
> > NFS root support. I boot client using my kernel, it does not requrest for
> > an IP address. It try to mount NFS root immediately. Do I forget
> > something?
> If you try to boot from a floppy that was created like "dd if=vmlinuz 
> of=/dev/fd0" you will need the attached patch. Alan Cox however told me 
> that the ability to boot without boot manager (e.g. lilo) will 
> eventually go away.

I hope it doesn't.  I use it quite frequently at work.  It's jsut so much
easier to use than installing a bootloader onto a floppy, mounting, copying
the kernel and so forth.

I did this patch which works for me, but only if root=/dev/nfs  It was done
against 2.4.13 or something around there, but it applies with offset to all
newer 2.4 kernels and I believe all 2.5 kernels.

--- net/ipv4/ipconfig-orig.c	2001-11-19 20:48:35.000000000 -0500
+++ net/ipv4/ipconfig.c	2001-11-19 20:56:21.000000000 -0500
@@ -1105,7 +1105,11 @@
 	proc_net_create("pnp", 0, pnp_get_info);
 #endif /* CONFIG_PROC_FS */
 
-	if (!ic_enable)
+	if (!ic_enable
+#if defined(IPCONFIG_DYNAMIC) && defined(CONFIG_ROOT_NFS)
+	    && ROOT_DEV != MKDEV(UNNAMED_MAJOR, 255)
+#endif
+	   )
 		return 0;
 
 	DBG(("IP-Config: Entered.\n"));


-- 
 Lab tests show that use of micro$oft causes cancer in lab animals

Re: NFS root on 2.4.18-14

[Andreas Steinmetz]

Wakko Warner wrote:
> I hope it doesn't.  I use it quite frequently at work.  It's jsut so much
> easier to use than installing a bootloader onto a floppy, mounting, copying
> the kernel and so forth.
Me too.
Oh, originally I posted my patch to lkml on Tue, 23 Oct 2001 13:20:50.
-- 
Andreas Steinmetz
D.O.M. Datenverarbeitung GmbH

Re: NFS root on 2.4.18-14

[Mr. James W. Laferriere]

	Hello Andreas & All , I have to third that request that directly
	bootable kernel floppies not go the way of staticly built kernels
	and the dodo bird .  JimL

On Mon, 14 Oct 2002, Andreas Steinmetz wrote:
> Wakko Warner wrote:
> > I hope it doesn't.  I use it quite frequently at work.  It's jsut so much
> > easier to use than installing a bootloader onto a floppy, mounting, copying
> > the kernel and so forth.
> Me too.
> Oh, originally I posted my patch to lkml on Tue, 23 Oct 2001 13:20:50.
> --
> Andreas Steinmetz
> D.O.M. Datenverarbeitung GmbH
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/
>

       +------------------------------------------------------------------+
       | James   W.   Laferriere | System    Techniques | Give me VMS     |
       | Network        Engineer |     P.O. Box 854     |  Give me Linux  |
       | babydr@baby-dragons.com | Coudersport PA 16915 |   only  on  AXP |
       +------------------------------------------------------------------+

Re: NFS root on 2.4.18-14

[Samuel Flory]

Theewara Vorakosit wrote:

>Dear All,
>    I use Red Hat 8.0 and kernel 2.4.18-14, which come from redhat
>distribution. I want create a NFS-root kernel to build a diskless linux
>using NFS root. I select "IP kernel level configuration-> BOOTP, DHCP",
>NFS root support. I boot client using my kernel, it does not requrest for
>an IP address. It try to mount NFS root immediately. Do I forget
>something?
>Thanks,
>Theewara
>
>  
>
You need to give the kernel instructions to use dhcp.   I've always 
found this works:

ip=::::::dhcp nfsroot=192.168.1.5:/vol0/nfs/root/10.01