Boot the Router over Network TFTP+NFS

[tomekmik]

I have try to boot my new wl500gx over the Network but it doesn't work.
What have i do:
1.Make a new kernel with NFS Client support and place the file vmlinux_nfs to TFTP Sever
2.Set the kernel arguments:
CFE> nvram set kernel_args "root=/dev/nfs nfsroot=192.168.1.6:/nfs_rootfs noinitrd init=/linuxrc console=ttyS0,115200"
CFE> nvram commit
I'm not sure it is valid for this kernel???
3. Boot over TFTP Server
CFE> boot -elf -tftp 192.168.1.6:vmlinux_nfs

The Router load the kernel and the kernel panic :
VFS: Cannot open root device "nfs" or 00:ff
Please append a correct "root=" boot option
Kernel panic: VFS: Unable to mount root fs on 00:ff


I think that the kernel_args are wrong or my kernel have not the right device /dev/nfs for mount the nfs rootfs.But i don't now how to fix it?
Have somebody try this on a Asus Router?
Hope somebody can help me.
Tomek

[tomekmik]

I have found the line CONFIG_ROOT_NFS=y in /root/broadcom/src/linux/linux/.config
and set to yes before it was not set.
Now when i run make kernel & make vmlinux i got this messages:

mipsel-linux-ld -G 0 -static -T arch/mips/ld.script arch/mips/kernel/head.o arch/mips/kernel/init_task.o init/main.o init/version.o init/do_mounts.o \
--start-group \
arch/mips/kernel/kernel.o arch/mips/mm/mm.o kernel/kernel.o mm/mm.o fs/fs.o ipc/ipc.o arch/mips/math-emu/fpu_emulator.o \
drivers/char/char.o drivers/block/block.o drivers/misc/misc.o drivers/net/net.o drivers/media/media.o drivers/pci/driver.o drivers/mtd/mtdlink.o drivers/net/wireless/wireless_net.o \
net/network.o \
arch/mips/lib/lib.a /root/broadcom/src/linux/linux/lib/lib.a arch/mips/brcm-boards/generic/brcm.o arch/mips/brcm-boards/bcm947xx/bcm947xx.o \
--end-group \
-o vmlinux
fs/fs.o: In function `root_nfs_name':
fs/fs.o(.text.init+0x1780): undefined reference to `root_server_path'
fs/fs.o(.text.init+0x1784): undefined reference to `root_server_path'
fs/fs.o: In function `root_nfs_addr':
fs/fs.o(.text.init+0x180c): undefined reference to `root_server_addr'
fs/fs.o(.text.init+0x1810): undefined reference to `root_server_addr'
fs/fs.o: In function `nfs_root_setup':
fs/fs.o(.text.init+0x1958): undefined reference to `root_nfs_parse_addr'
fs/fs.o(.text.init+0x196c): undefined reference to `root_server_addr'
fs/fs.o(.text.init+0x1970): undefined reference to `root_server_addr'
fs/fs.o: In function `root_nfs_getport':
fs/fs.o(.text.init+0x1a34): undefined reference to `rpc_getport_external'
make: *** [vmlinux] Error 1

I think some patches are needed for the source but which one i don't know.
Please Help

[WlanMan]

Hi

I´ve not used nfs boot, bot for me this looks you have not selected all modules needet for nfs root, or you have to compile-in the server path what should be then again some setting in the config file ...

You may look at the kernal config file of other nfs booting distributions on the net.

greets

[tomekmik]

thanks for replay
i have change some settings in the .config
but now a get this error:

mipsel-linux-ld -G 0 -static -T arch/mips/ld.script arch/mips/kernel/head.o arch/mips/kernel/init_task.o init/main.o init/version.o init/do_mounts.o \
--start-group \
arch/mips/kernel/kernel.o arch/mips/mm/mm.o kernel/kernel.o mm/mm.o fs/fs.o ipc/ipc.o arch/mips/math-emu/fpu_emulator.o \
drivers/char/char.o drivers/block/block.o drivers/misc/misc.o drivers/net/net.o drivers/media/media.o drivers/pci/driver.o drivers/mtd/mtdlink.o drivers/net/wireless/wireless_net.o drivers/usb/usbdrv.o \
net/network.o \
arch/mips/lib/lib.a /root/broadcom/src/linux/linux/lib/lib.a arch/mips/brcm-boards/generic/brcm.o arch/mips/brcm-boards/bcm947xx/bcm947xx.o \
--end-group \
-o vmlinux
fs/fs.o: In function `root_nfs_getport':
fs/fs.o(.text.init+0x1a34): undefined reference to `rpc_getport_external'
make: *** [vmlinux] Error 1
[root@xenon linux]#

I have spend many hours and have no ideas more.
Have somebody a idea what i have done wrong?

[Randale91]

HI,

do you use "make menuconfig" ?
If not, create a backup and try to configure it with "make menuconfig"!!!!
Three month ago I had some errors with fat filesystems, too.
(missing options in .config)

Try it with:

#
# Network File Systems
#
# CONFIG_CODA_FS is not set
# CONFIG_INTERMEZZO_FS is not set
CONFIG_NFS_FS=y
CONFIG_NFS_V3=y
CONFIG_ROOT_NFS=y
CONFIG_SWAP_VIA_NFS=y
CONFIG_NETSWAP=y
# CONFIG_NFSD is not set
# CONFIG_NFSD_V3 is not set
# CONFIG_NFSD_TCP is not set
CONFIG_SUNRPC=y
CONFIG_LOCKD=y
CONFIG_LOCKD_V4=y

[tomekmik]

thanks thanks respect
the tip with "make menuconfig" was excellent it works now
i have run make menuconfig but the mistake was that i have not run
the make menuconfig after change the CONFIG_ROOT_NFS=y in .config

here the solution:

1. make menuconfig > enable under File systems > Network File Systems:

<*> NFS file system support
[*[ Provide NFSv3 client support
save kernel configuration

2. edit .config > change CONFIG_ROOT_NFS=y and CONFIG_IP_PNP=y
3. make menuconfig check "File systems > Network File Systems >
> Root file system on NFS" if is enabled then save kernel configuration
4. make vmlinux

and now setup the kernel parameter and boot kernel over network

CFE>nvram set kernel_args="root=/dev/nfs nfsroot=/nfs_rootfs nfsaddrs=192.168.1.31:192.168.1.4:192.168.1.4:255.255.255.0:asus3:eth0 noinitrd init=/linuxrc_my console=ttyS0,115200"
CFE>nvram commit

CFE> boot -elf -tftp 192.168.1.4:vmlinux_asus_nfs_usb
Loader:elf Filesys:tftp Dev:eth0 File:192.168.1.4:vmlinux_asus_nfs_usb Options:(null)
Loading: TFTP Client.
0x0/88 0x80001000/2326760 0x8023a000/368640 0x80294000/208912 Entry at 0x8023c040
Closing network.
Starting program at 0x8023c040
cpu probe
prom init
cpu report
CPU revision is: 00029007
Primary instruction cache 8kb, linesize 16 bytes (2 ways)
Primary data cache 4kb, linesize 16 bytes (2 ways)
Linux version 2.4.20 (root@xenon) (gcc version 3.2.3 with Broadcom modifications) #63 Fri Jan 13 18:23:14 CET 2006
Setting the PFC value as 0x15
Determined physical RAM map:
 memory: 02000000 @ 00000000 (usable)
On node 0 totalpages: 8192
zone(0): 8192 pages.
zone(1): 0 pages.
zone(2): 0 pages.
Kernel command line: root=/dev/nfs nfsroot=/nfs_rootfs nfsaddrs=192.168.1.31:192.168.1.4:192.168.1.4:255.255.255.0:asus3:et0CPU: BCM5365 rev 1 at 200 MHz
Calibrating delay loop... 199.47 BogoMIPS
Memory: 29560k/32768k available (2272k kernel code, 3208k reserved, 264k data, 80k init, 0k highmem)
Dentry cache hash table entries: 4096 (order: 3, 32768 bytes)
Inode cache hash table entries: 2048 (order: 2, 16384 bytes)
Mount-cache hash table entries: 512 (order: 0, 4096 bytes)
Buffer-cache hash table entries: 1024 (order: 0, 4096 bytes)
Page-cache hash table entries: 8192 (order: 3, 32768 bytes)
Checking for 'wait' instruction...  unavailable.
POSIX conformance testing by UNIFIX
PCI: Fixing up bus 0
PCI: Fixing up bridge
PCI: Fixing up bus 1
Linux NET4.0 for Linux 2.4
Based upon Swansea University Computer Society NET3.039
Initializing RT netlink socket
Starting kswapd
Journalled Block Device driver loaded
devfs: v1.12c (20020818) Richard Gooch (rgooch@atnf.csiro.au)
devfs: boot_options: 0x1
pty: 256 Unix98 ptys configured
Serial driver version 5.05c (2001-07-08) with MANY_PORTS SHARE_IRQ SERIAL_PCI enabled
ttyS00 at 0xb8000300 (irq = 3) is a 16550A
ttyS01 at 0xb8000400 (irq = 0) is a 16550A
eth0: Broadcom BCM47xx 10/100 Mbps Ethernet Controller 3.90.7.0
SCSI subsystem driver Revision: 1.00
 Amd/Fujitsu Extended Query Table v1.1 at 0x0040
number of CFI chips: 1
Flash device: 0x400000 at 0x1c000000
Physically mapped flash: Couldn't find valid ROM disk image
Creating 4 MTD partitions on "Physically mapped flash":
0x00000000-0x00040000 : "pmon"
0x00040000-0x003f0000 : "linux"
0x00000000-0x00400000 : "rootfs"
0x003f0000-0x00400000 : "nvram"
sflash: found no supported devices
usb.c: registered new driver usbdevfs
usb.c: registered new driver hub
PCI: Enabling device 01:02.2 (0000 -> 0002)
ehci_hcd 01:02.2: VIA Technologies, Inc. USB 2.0
ehci_hcd 01:02.2: irq 2, pci mem c0000000
usb.c: new USB bus registered, assigned bus number 1
PCI: 01:02.2 PCI cache line size set incorrectly (0 bytes) by BIOS/FW, correcting to 32
ehci_hcd 01:02.2: USB 2.0 enabled, EHCI 1.00, driver 2003-Dec-29/2.4
hub.c: USB hub found
hub.c: 4 ports detected
host/uhci.c: USB Universal Host Controller Interface driver v1.1
PCI: Enabling device 01:02.0 (0000 -> 0001)
host/uhci.c: USB UHCI at I/O 0x100, IRQ 2
usb.c: new USB bus registered, assigned bus number 2
hub.c: USB hub found
hub.c: 2 ports detected
PCI: Enabling device 01:02.1 (0000 -> 0001)
host/uhci.c: USB UHCI at I/O 0x120, IRQ 2
usb.c: new USB bus registered, assigned bus number 3
hub.c: USB hub found
hub.c: 2 ports detected
host/usb-ohci.c: USB OHCI at membase 0xb8003000, IRQ 6
host/usb-ohci.c: usb-00:03.0, PCI device 14e4:4715 (Broadcom Corporation)
usb.c: new USB bus registered, assigned bus number 4
hub.c: USB hub found
hub.c: 2 ports detected
usb.c: registered new driver usblp
printer.c: v0.13: USB Printer Device Class driver
NET4: Linux TCP/IP 1.0 for NET4.0
IP Protocols: ICMP, UDP, TCP
IP: routing cache hash table of 512 buckets, 4Kbytes
TCP: Hash tables configured (established 2048 bind 4096)
IP-Config: Complete:
      device=eth0, addr=192.168.1.31, mask=255.255.255.0, gw=192.168.1.4,
     host=asus3, domain=, nis-domain=(none),
     bootserver=192.168.1.4, rootserver=192.168.1.4, rootpath=
ip_conntrack version 2.1 (256 buckets, 2048 max) - 344 bytes per conntrack
ip_tables: (C) 2000-2002 Netfilter core team
ipt_time loading
NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
NET4: Ethernet Bridge 008 for NET4.0
802.1Q VLAN Support v1.7 Ben Greear <greearb@candelatech.com>
All bugs added by David S. Miller <davem@redhat.com>
Looking up port of RPC 100003/2 on 192.168.1.4
Looking up port of RPC 100005/1 on 192.168.1.4
VFS: Mounted root (nfs filesystem).
Mounted devfs on /dev
Freeing unused kernel memory: 80k freed
Algorithmics/MIPS FPU Emulator v1.5
hub.c: new USB device 01:02.2-1, assigned address 2
usb.c: USB device 2 (vend/prod 0xea0/0x2168) is not claimed by any active driver.
PCI: Enabling device 01:03.0 (0004 -> 0006)
eth1: Broadcom BCM4320 802.11 Wireless Controller 3.90.23.0
vlan0: dev_set_promiscuity(master, 1)
device eth0 entered promiscuous mode
device vlan0 entered promiscuous mode
eth2: No such device
eth3: No such device
device wds0.49153 entered promiscuous mode
br0: port 2(wds0.49153) entering listening state
br0: port 1(vlan0) entering listening state
br0: port 2(wds0.49153) entering learning state
br0: port 1(vlan0) entering learning state
br0: port 2(wds0.49153) entering forwarding state
br0: topology change detected, propagating
br0: port 1(vlan0) entering forwarding state
br0: topology change detected, propagating
/etc/hosts: Read-only file system
usb.c: unable to get major 180 for usb devices
usb.c: registered new driver usbdevfs
usb.c: deregistering driver usbdevfs
usb.c: registered new driver hub
usb-uhci.c: $Revision: 1.275 $ time 21:43:09 Apr 20 2005
usb-uhci.c: High bandwidth mode enabled
usb-uhci.c: v1.275:USB Universal Host Controller Interface driver
usb.c: registered new driver usblp
printer.c: v0.13: USB Printer Device Class driver
usb.c: registered new driver audio
audio.c: v1.0.0:USB Audio Class driver
Linux video capture interface: v1.00
SCSI subsystem driver Revision: 1.00
devfs_mk_dir(scsi): using old entry in dir: 81073bc0 ""
Initializing USB Mass Storage driver...
usb.c: registered new driver usb-storage
USB Mass Storage support registered.
vlan1: Setting MAC address to  00 15 f2 6a e6 a0.
VLAN (vlan1):  Underlying device (eth0) has same MAC, not checking promiscious mode.
/proc/sys/net/ipv6/conf/all/forwarding: No such file or directory
vlan1: add 01:00:5e:00:00:01 mcast address to master interface
PCI devices found:
    FLASH memory: PCI device 14e4:0800 (Broadcom Corporation) (rev 1).
    Ethernet controller: PCI device 14e4:4713 (Broadcom Corporation) (rev 1).
    Network and computing encryption device: PCI device 14e4:4718 (Broadcom Corporation) (rev 1).
    USB Controller: PCI device 14e4:4715 (Broadcom Corporation) (rev 1).
    PCI bridge: PCI device 14e4:0804 (Broadcom Corporation) (rev 1).
    MIPS: PCI device 14e4:0816 (Broadcom Corporation) (rev 1).
    RAM memory: PCI device 14e4:080f (Broadcom Corporation) (rev 1).
    Host bridge: PCI device 14e4:5365 (Broadcom Corporation) (rev 0).
    Network controller: PCI device 14e4:4320 (Broadcom Corporation) (rev 3).
echo for PaN ::: &&&PaN

/ #
/ # df -k
Filesystem           1k-blocks      Used Available Use% Mounted on
/dev/root              5951776   3585516   2059044  64% /
/ # mount
/dev/root on / type nfs (ro,v2,rsize=4096,wsize=4096,hard,udp,nolock,addr=192.168.1.4)
none on /dev type devfs (rw)
proc on /proc type proc (rw)
ramfs on /tmp type ramfs (rw)
usbfs on /proc/bus/usb type usbfs (rw)
/ #

[Randale91]

Yeah, thats great.

Can you please post your working .config ?

[tomekmik]

hi,
my last test was with Olegs wl500g-1.9.2.7-6b Firmware
Many thanks to Oleg for great work

I also have change the Makefile in broadcom/src/wl500g-1.9.2.7-6b
because the changed et driver from Oleg doesn't setup the interface up and the nfs mount hangs. I don't know why maybe Oleg knows
I have use the kernel_my from the Makefile to make kernel.