Bug#721088: initramfs-tools: nfsroot with pxelinux fails on systems with multiple NICs
Package: initramfs-tools
Version: 0.109.1
Severity: normal
When I try to use Debian initramfs to mount root over NFS on a machine with
multiple NICs, it never succeeds, because the initramfs configures all NICs
with the same IP address.
In more detail, the following happens:
o I have configured pxelinux to boot Linux kernel and set "ipappend 3",
so that pxelinux appends "ip=" and "BOOTIF=" to kernel options. The
former contains the IP address and netmask (but no information on the
interface, which is logical, because it has no idea how will the kernel
name the interface). The latter contains the MAC address of the boot
interface.
o configure_networking() in scripts/functions inside the initramfs
correctly detects that BOOTIF was passed and sets the DEVICE variable
to the name of the right network device.
o Later, configure_networking() detects that the "ip" parameter contains
something complex (different from trivial things like "any", "off",
"dhcp", ...) and runs ipconfig on all interfaces.
o Therefore, the DEVICE variable calculated from BOOTIF is not used at all.
A simple work-around exists: let pxelinux pass only the BOOTIF parameter
("ipappend 2") and add "ip=dhcp" manually, in which case configure_networking()
behaves correctly and runs ipconfig only on the matching interface. However,
(1) this is unnecessarily slow (DHCP is run twice, once in PXE and then in
the initramfs), (2) one should not need such tricks to get a working nfsroot.
I propose the following fix: In the "complex ip parameter" case (around line
393 in my version of the scripts/functions file), the DEVICE variable should
be checked and if it already set, ipconfig should be run only on the selected
device.
Also, the NEW_DEVICE logic below that call to ipconfig is likely wrong for the
same reason. I think it should be moved to the same place where the BOOTIF
check resides.
If you wish, I can provide a patch.
-- Package-specific info:
-- initramfs sizes
-- /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-3.9.2-kam root=UUID=9a1f02a6-70f0-4958-821a-b603696c6d2d ro
-- /proc/filesystems
ext3
ext2
ext4
vfat
msdos
iso9660
romfs
udf
-- lsmod
Module Size Used by
usblp 9474 0
tun 15607 2
deflate 1775 0
zlib_deflate 17451 1 deflate
ctr 3415 0
twofish_generic 6017 0
twofish_x86_64_3way 18587 0
twofish_x86_64 5221 1 twofish_x86_64_3way
twofish_common 12753 3 twofish_generic,twofish_x86_64_3way,twofish_x86_64
camellia_generic 18041 0
camellia_x86_64 43873 0
serpent_sse2_x86_64 44621 0
serpent_generic 18028 1 serpent_sse2_x86_64
xts 2687 3 camellia_x86_64,serpent_sse2_x86_64,twofish_x86_64_3way
lrw 3069 3 camellia_x86_64,serpent_sse2_x86_64,twofish_x86_64_3way
gf128mul 5138 2 lrw,xts
glue_helper 3105 3 camellia_x86_64,serpent_sse2_x86_64,twofish_x86_64_3way
blowfish_generic 3032 0
blowfish_x86_64 13244 0
blowfish_common 6159 2 blowfish_generic,blowfish_x86_64
cast5_generic 10293 0
cast_common 4849 1 cast5_generic
ablk_helper 1556 1 serpent_sse2_x86_64
cryptd 6479 1 ablk_helper
xcbc 2269 0
rmd160 7160 0
sha512_generic 4553 0
sha256_generic 9509 0
sha1_generic 1822 0
crypto_null 2468 0
af_key 22195 0
xfrm_algo 4208 1 af_key
ip6t_REJECT 2428 3
xt_nat 1777 6
ipt_REJECT 2009 2
xt_LOG 9702 5
xt_limit 1678 7
xt_state 1151 3
xt_multiport 1566 2
xt_DSCP 2003 2
xt_owner 1107 3
xt_mark 1133 8
xt_connmark 1653 2
ip6table_filter 1284 1
ip6_tables 13824 1 ip6table_filter
iptable_mangle 1424 1
iptable_nat 2382 1
nf_conntrack_ipv4 6526 6
nf_defrag_ipv4 1259 1 nf_conntrack_ipv4
nf_nat_ipv4 2992 1 iptable_nat
nf_nat 11007 3 nf_nat_ipv4,xt_nat,iptable_nat
nf_conntrack 50975 6 nf_nat,xt_state,nf_nat_ipv4,xt_connmark,iptable_nat,nf_conntrack_ipv4
iptable_filter 1312 1
ip_tables 13378 3 iptable_filter,iptable_mangle,iptable_nat
x_tables 13511 16 ip6table_filter,xt_DSCP,xt_mark,ip_tables,xt_limit,xt_owner,xt_state,xt_LOG,xt_nat,xt_multiport,iptable_filter,xt_connmark,ipt_REJECT,iptable_mangle,ip6_tables,ip6t_REJECT
acpi_cpufreq 6294 1
mperf 1107 1 acpi_cpufreq
snd_hda_codec_hdmi 24489 1
kvm_amd 43896 0
snd_hda_codec_realtek 26712 1
kvm 315861 1 kvm_amd
radeon 631819 2
snd_hda_intel 26851 1
snd_hda_codec 102967 3 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_intel
snd_pcm 62018 3 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel
snd_page_alloc 6002 2 snd_pcm,snd_hda_intel
fbcon 32349 72
bitblit 4081 1 fbcon
fbcon_rotate 1796 1 bitblit
fbcon_ccw 4462 1 fbcon_rotate
fbcon_ud 4509 1 fbcon_rotate
fbcon_cw 4406 1 fbcon_rotate
softcursor 1141 4 fbcon_cw,fbcon_ud,fbcon_ccw,bitblit
font 7292 1 fbcon
tileblit 1965 1 fbcon
drm_kms_helper 22796 1 radeon
ttm 51242 1 radeon
drm 195966 4 ttm,drm_kms_helper,radeon
cfbfillrect 2994 1 radeon
cfbimgblt 1943 1 radeon
cfbcopyarea 2982 1 radeon
i2c_algo_bit 4463 1 radeon
fb 44774 9 fbcon,fbcon_cw,fbcon_ud,drm_kms_helper,radeon,softcursor,fbcon_ccw,tileblit,bitblit
processor 32110 1 acpi_cpufreq
fbdev 798 2 fb,fbcon
snd_timer 14965 1 snd_pcm
snd 46104 8 snd_hda_codec_realtek,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_hda_codec,snd_hda_intel
parport_pc 23562 0
i2c_piix4 7463 0
k10temp 2698 0
asus_atk0110 8418 0
wmi 6955 0
button 4525 0
ehci_pci 3312 0
parport 25915 1 parport_pc
hid_generic 1105 0
usbhid 22258 0
hid 73002 2 hid_generic,usbhid
microcode 9233 0
r8169 46016 0
ohci_hcd 17344 0
ehci_hcd 31352 1 ehci_pci
firewire_ohci 26301 0
firewire_core 42677 1 firewire_ohci
usbcore 127518 6 usblp,ohci_hcd,ehci_hcd,ehci_pci,usbhid
usb_common 874 1 usbcore
-- /etc/initramfs-tools/modules
-- /etc/initramfs-tools/initramfs.conf
MODULES=most
BUSYBOX=y
KEYMAP=n
COMPRESS=gzip
DEVICE=
NFSROOT=auto
-- /etc/initramfs-tools/update-initramfs.conf
update_initramfs=yes
backup_initramfs=no
-- mkinitramfs hooks
/etc/initramfs-tools/hooks/:
/usr/share/initramfs-tools/hooks:
amd64_microcode
busybox
dmsetup
fuse
keymap
klibc
kmod
ntfs_3g
thermal
udev
-- System Information:
Debian Release: 7.1
APT prefers stable-updates
APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 3.9.2-kam (SMP w/4 CPU cores; PREEMPT)
Locale: LANG=C, LC_CTYPE=cs_CZ.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages initramfs-tools depends on:
ii cpio 2.11+dfsg-0.1
ii klibc-utils 2.0.1-3.1
ii kmod 9-3
ii module-init-tools 9-3
ii udev 175-7.2
Versions of packages initramfs-tools recommends:
pn busybox | busybox-initramfs | busybox-static <none>
Versions of packages initramfs-tools suggests:
pn bash-completion <none>
-- no debconf information
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