Bug#722318: prepend_earlyinitramfs makes inspecting initramfs unnecessarily hard
Package: initramfs-tools
Version: 0.113
Severity: normal
Hi,
The initramfs tools generally build an initramfs that is compressed; if
a hook script uses the prepend_initramfs function in the hook-functions
library, however (as the intel-microcode package does), then that
prepended part of the initramfs is not compressed.
When I have a problem, usually my preferred way of debugging is to run
"mkdir foo; cd foo; zcat $initramfs | cpio -i", and then using normal
file operations. When trying that on a file that starts with
uncompressed data, zcat will however refuse to open the file (unless the
-f parameter is used, but then compression is switched off and not
switched on afterwards when we do encounter compressed data); cpio
doesn't have a transparent decompress option AFAICT; and I'm not sure
how to figure out what the offset of the compressed data is.
As a result, the only way that I can see to inspect my initramfs is to
uninstall the intel-microcode package, regenerate the initramfs, and
inspect it. This can't be the intention.
-- Package-specific info:
-- initramfs sizes
-rw-r--r-- 1 root root 12M Aug 13 08:01 /boot/initrd.img-3.10-1-amd64
-rw-r--r-- 1 root root 12M Sep 2 18:24 /boot/initrd.img-3.10-2-amd64
-- /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-3.10-2-amd64 root=UUID=9e3c4c8e-014c-4473-816e-3eaa78571af9 ro pcie_aspm=force i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.i915_enable_fbc=1 vga=788 quiet
-- /proc/filesystems
ext4
fuseblk
-- lsmod
Module Size Used by
usbhid 40964 0
hid 81894 1 usbhid
parport_pc 22409 0
ppdev 12763 0
lp 13025 0
autofs4 27746 3
parport 31901 3 lp,ppdev,parport_pc
bnep 17535 2
rfcomm 33471 10
pci_stub 12429 1
vboxpci 19094 0
vboxnetadp 25443 0
snd_hrtimer 12604 1
vboxnetflt 23697 0
vboxdrv 217395 3 vboxnetadp,vboxnetflt,vboxpci
cpufreq_userspace 12576 0
cpufreq_stats 12866 0
cpufreq_powersave 12454 0
cpufreq_conservative 14184 0
binfmt_misc 12925 1
uinput 17439 1
nfsd 192007 13
auth_rpcgss 39085 1 nfsd
oid_registry 12419 1 auth_rpcgss
nfs_acl 12511 1 nfsd
nfs 110304 0
lockd 59673 2 nfs,nfsd
dns_resolver 12641 1 nfs
fscache 37551 1 nfs
sunrpc 164583 23 nfs,nfsd,auth_rpcgss,lockd,nfs_acl
ipt_MASQUERADE 12594 3
iptable_nat 12646 1
nf_conntrack_ipv4 18549 1
nf_defrag_ipv4 12483 1 nf_conntrack_ipv4
nf_nat_ipv4 12950 1 iptable_nat
nf_nat 18378 3 ipt_MASQUERADE,nf_nat_ipv4,iptable_nat
nf_conntrack 59788 5 ipt_MASQUERADE,nf_nat,nf_nat_ipv4,iptable_nat,nf_conntrack_ipv4
ip_tables 22036 1 iptable_nat
x_tables 19041 2 ip_tables,ipt_MASQUERADE
tun 22444 2
loop 22869 0
fuse 67503 1
ecryptfs 72544 0
snd_hda_codec_hdmi 31720 1
snd_hda_codec_conexant 40314 1
cdc_mbim 12736 0
uvcvideo 66788 0
cdc_ncm 17458 1 cdc_mbim
videobuf2_vmalloc 12848 1 uvcvideo
videobuf2_memops 12519 1 videobuf2_vmalloc
coretemp 12898 0
videobuf2_core 31098 1 uvcvideo
usbnet 22817 2 cdc_mbim,cdc_ncm
videodev 92407 2 uvcvideo,videobuf2_core
kvm_intel 123583 0
mii 12675 1 usbnet
media 18240 2 uvcvideo,videodev
kvm 301458 1 kvm_intel
cdc_wdm 17511 1 cdc_mbim
cdc_acm 22246 0
btusb 17678 0
crc32c_intel 21850 0
bluetooth 170002 22 bnep,btusb,rfcomm
ghash_clmulni_intel 13062 0
arc4 12543 2
iTCO_wdt 12831 0
iTCO_vendor_support 12704 1 iTCO_wdt
snd_hda_intel 35718 0
snd_hda_codec 122850 3 snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_intel
snd_hwdep 13189 1 snd_hda_codec
snd_pcm 68525 3 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel
aesni_intel 50895 2
iwldvm 111931 0
snd_page_alloc 13018 2 snd_pcm,snd_hda_intel
mac80211 358182 1 iwldvm
thinkpad_acpi 61301 0
aes_x86_64 16719 1 aesni_intel
ablk_helper 12572 1 aesni_intel
nvram 13092 1 thinkpad_acpi
cryptd 14560 3 ghash_clmulni_intel,aesni_intel,ablk_helper
snd_seq 45186 1
lrw 12871 1 aesni_intel
snd_seq_device 13176 1 snd_seq
snd_timer 22773 3 snd_hrtimer,snd_pcm,snd_seq
gf128mul 13047 1 lrw
i915 494628 2
glue_helper 12768 1 aesni_intel
snd 53068 11 snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_pcm,snd_seq,snd_hda_codec,snd_hda_intel,thinkpad_acpi,snd_seq_device
psmouse 74832 0
iwlwifi 73295 1 iwldvm
serio_raw 12940 0
pcspkr 12632 0
drm_kms_helper 31837 1 i915
soundcore 13026 1 snd
evdev 17611 22
microcode 30413 0
drm 211856 3 i915,drm_kms_helper
cfg80211 319971 3 iwlwifi,mac80211,iwldvm
i2c_algo_bit 12841 1 i915
battery 13101 0
i2c_i801 17045 0
ac 12668 0
rfkill 19242 5 cfg80211,thinkpad_acpi,bluetooth
lpc_ich 16757 0
mei_me 13568 0
i2c_core 24353 6 drm,i915,i2c_i801,drm_kms_helper,i2c_algo_bit,videodev
mfd_core 12601 1 lpc_ich
mei 45886 1 mei_me
wmi 13243 0
mperf 12453 0
video 17792 1 i915
processor 28526 0
button 12944 1 i915
ext4 381419 1
crc16 12343 2 ext4,bluetooth
jbd2 76205 1 ext4
mbcache 13082 1 ext4
nbd 16897 0
dm_mirror 17748 0
dm_region_hash 13589 1 dm_mirror
dm_log 13590 2 dm_region_hash,dm_mirror
dm_mod 64008 2 dm_log,dm_mirror
sg 26095 0
sd_mod 40541 2
crc_t10dif 12348 1 sd_mod
mmc_block 26824 0
ahci 25148 1
libahci 23136 1 ahci
thermal 17468 0
thermal_sys 23137 3 video,thermal,processor
sdhci_pci 17935 0
sdhci 27279 1 sdhci_pci
ehci_pci 12472 0
xhci_hcd 78280 0
ehci_hcd 40590 1 ehci_pci
mmc_core 77762 3 mmc_block,sdhci,sdhci_pci
e1000e 139582 0
ptp 13364 1 e1000e
pps_core 13232 1 ptp
usbcore 134993 11 btusb,uvcvideo,ehci_hcd,ehci_pci,usbhid,usbnet,cdc_mbim,cdc_acm,cdc_ncm,cdc_wdm,xhci_hcd
usb_common 12440 1 usbcore
libata 141969 2 ahci,libahci
scsi_mod 158249 3 sg,libata,sd_mod
-- /etc/initramfs-tools/modules
-- /etc/kernel-img.conf
# Kernel image management overrides
# See kernel-img.conf(5) for details
do_symlinks = yes
do_bootloader = no
do_initrd = yes
link_in_boot = no
-- /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:
busybox
dmraid
dmsetup
fuse
intel_microcode
keymap
klibc
kmod
nbd
ntfs_3g
thermal
udev
uswsusp
-- System Information:
Debian Release: jessie/sid
APT prefers unstable
APT policy: (500, 'unstable'), (500, 'testing'), (500, 'stable'), (500, 'oldstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 3.10-2-amd64 (SMP w/4 CPU cores)
Locale: LANG=nl_BE.UTF-8, LC_CTYPE=nl_BE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages initramfs-tools depends on:
ii cpio 2.11+dfsg-1
ii klibc-utils 2.0.2-1
ii kmod 9-3
ii module-init-tools 9-3
ii udev 175-7.2
Versions of packages initramfs-tools recommends:
ii busybox 1:1.20.0-9
Versions of packages initramfs-tools suggests:
pn bash-completion <none>
-- no debconf information
Reply to: