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Bug#355580: initramfs-tools: fails to load required modules, boot fails

Package: initramfs-tools
Version: 0.53
Severity: important
Tags: patch

Three problems: no installation of module; no loading of "linear" module in md; using mdrun in scripts/local-top/md give incorrect md modules.

The hook function "manual_add_modules" uses modprobe to find the actual module to load. Unfortunately, possibly due to an error in modprobe, this leads to modules not being loaded.

My RAID1 and LINEAR-based system had the following line in /etc/modprobe.d/md:

install md_mod /sbin/modprobe sata_promise; /sbin/modprobe --ignore-install md_mod

When I run

# modprobe  --set-version=2.6.15-1-k7 --show-depends md_mod

I get the result

install /sbin/modprobe sata_promise; /sbin/modprobe --ignore-install md_mod

but *no* insmod. Therefore, when this is run during mkinitramfs, the module md_mod is not installed. I realize that although modprobe documentation leads one to believe that there will be an insmod line printed, in fact there is not such line printed.

The patch: add "--ignore-install" to the modprobe line in manual_add_modules:

modprobe --ignore-install --set-version="${version}" --show-depends "${1}"

this produces a line with "inmod".

The next problem wtih initramfs-tools is for md specifically. First of all, some mischevious person has renamed the "md" module to "md-mod". This means the distribution hook hooks/md is out of date, because it attempts to load md. Secondly, that script also failes to load "linear". 

Current fragment:

for x in md raid0 raid1 raid5 raid6; do
        manual_add_modules ${x}

New fragment:

for x in md_mod linear raid0 raid1 raid5 raid6; do
        manual_add_modules ${x}

Now, as for scripts/local-top/md, I have found that "mdrun" attempts to start /dev/md/0, even though there is no such device on my system. I have /1, /2, and /3, but not /0. I have not been able to debug mdrun.

Instead of using mdrun, I use the following:

In scripts/local-top/md:

mkdir /dev/md	# --auto requires this directory pre-exist
/sbin/mdadm --assemble --scan --auto=md --config=/etc/mdadm/mdadm.conf 

And in hooks/md I add the line:

cp /etc/mdadm/mdadm.conf ${DESTDIR}/etc/mdadm/mdadm.conf

This has the added advantage that *only* the devices that are actually needed are created in /dev/md, instead of dozens of devices  that aren't used. udev automatically creates the link between /dev/mdN and /dev/md/N.

Please feel free to write for clarifications or further tests.

-- System Information:
Debian Release: testing/unstable
  APT prefers unstable
  APT policy: (990, 'unstable'), (500, 'testing'), (500, 'stable')
Architecture: i386 (i686)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.15-1-k7
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)

Versions of packages initramfs-tools depends on:
ii  busybox                       1:1.01-4   Tiny utilities for small and embed
ii  cpio                          2.6-10     GNU cpio -- a program to manage ar
ii  klibc-utils                   1.2.2-3    small statically-linked utilities 
ii  udev                          0.086-1    /dev/ and hotplug management daemo

initramfs-tools recommends no packages.

-- no debconf information

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