Pull in weak-modules script for kABI
This commit is contained in:
Václav Pavlín
parent
917c6ed9e9
commit
59185aa6d2
10
kmod.spec
10
kmod.spec
@ -1,12 +1,13 @@
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Name: kmod
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Version: 12
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Release: 3%{?dist}
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Release: 4%{?dist}
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Summary: Linux kernel module management utilities
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Group: System Environment/Kernel
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License: GPLv2+
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URL: http://git.kernel.org/?p=utils/kernel/kmod/kmod.git;a=summary
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Source0: ftp://ftp.kernel.org/pub/linux/utils/kernel/kmod/%{name}-%{version}.tar.xz
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Source1: weak-modules
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Exclusiveos: Linux
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BuildRoot: %(mktemp -ud %{_tmppath}/%{name}-%{version}-%{release}-XXXXXX)
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@ -75,6 +76,9 @@ mkdir -p $RPM_BUILD_ROOT%{_sysconfdir}/modprobe.d
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mkdir -p $RPM_BUILD_ROOT%{_sysconfdir}/depmod.d
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mkdir -p $RPM_BUILD_ROOT%{_prefix}/lib/modprobe.d
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mkdir -p $RPM_BUILD_ROOT/sbin
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install -m 755 %{SOURCE1} $RPM_BUILD_ROOT%{_sbindir}/weak-modules
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%post libs -p /sbin/ldconfig
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%postun libs -p /sbin/ldconfig
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@ -91,6 +95,7 @@ mkdir -p $RPM_BUILD_ROOT%{_prefix}/lib/modprobe.d
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%{_sbindir}/rmmod
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%{_sbindir}/lsmod
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%{_sbindir}/depmod
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%{_sbindir}/weak-modules
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%attr(0644,root,root) %{_mandir}/man5/*.5*
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%attr(0644,root,root) %{_mandir}/man8/*.8*
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%doc NEWS README TODO COPYING
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@ -104,6 +109,9 @@ mkdir -p $RPM_BUILD_ROOT%{_prefix}/lib/modprobe.d
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%{_libdir}/libkmod.so
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%changelog
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* Thu Mar 20 2013 Weiping Pan <wpan@redhat.com> - 12-3
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- Pull in weak-modules for kABI from Jon Masters <jcm@redhat.com>
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* Mon Mar 18 2013 Josh Boyer <jwboyer@redhat.com>
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- Add patch to make rmmod understand built-in modules (rhbz 922187)
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475
weak-modules
Normal file
475
weak-modules
Normal file
@ -0,0 +1,475 @@
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#!/bin/bash
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#
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# weak-modules - determine which modules are kABI compatible with installed
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# kernels and set up the symlinks in /lib/*/weak-updates.
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#
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# Changelog:
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#
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# 2010/01/10 - Further updates for dracut use on Fedora/RHEL (jcm).
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# 2009/09/16 - Rebase and add a bunch of updates for dracut (jcm).
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unset LANG LC_ALL LC_COLLATE
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tmpdir=$(mktemp -td ${0##*/}.XXXXXX)
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trap "rm -rf $tmpdir" EXIT
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unset ${!changed_modules_*} ${!changed_initramfs_*}
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initramfs_prefix="/boot" # can customize here
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dracut="/sbin/dracut"
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if [ ! -x "$dracut" ]
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then
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echo "weak-modules: this tool requires a dracut-enabled kernel"
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exit 1
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fi
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# doit:
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# A wrapper used whenever we're going to perform a real operation.
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doit() {
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[ -n "$verbose" ] && echo "$@"
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[ -n "$dry_run" ] || "$@"
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}
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# rpmsort: The sort in coreutils can't sort the RPM list how we want it so we
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# instead transform the list into a form it will sort correctly, then sort.
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rpmsort() {
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local IFS=$' '
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REVERSE=""
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rpmlist=($(cat))
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if [ "-r" == "$1" ];
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then
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REVERSE="-r"
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fi
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echo ${rpmlist[@]} | \
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sed -e 's/-/../g' | \
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sort ${REVERSE} -n -t"." -k1,1 -k2,2 -k3,3 -k4,4 -k5,5 -k6,6 -k7,7 \
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-k8,8 -k9,9 -k10,10 | \
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sed -e 's/\.\./-/g'
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}
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# read_modules_list:
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# Read in a list of modules from standard input. Convert the filenames into
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# absolute paths and compute the kernel release for each module (either using
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# the modinfo section or through the absolute path.
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read_modules_list() {
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local IFS=$'\n'
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modules=($(cat))
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for ((n = 0; n < ${#modules[@]}; n++)); do
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if [ ${modules[n]:0:1} != '/' ]; then
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modules[n]="$PWD/${modules[n]}"
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fi
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if [ -f "${modules[n]}" ]; then
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module_krels[n]=$(krel_of_module ${modules[n]})
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else
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# Try to extract the kernel release from the path
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set -- "${modules[n]#/lib/modules/}"
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module_krels[n]=${1%%/*}
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fi
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done
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}
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# read_old_initramfs:
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compare_initramfs_modules() {
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local old_initramfs=$1
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local new_initramfs=$2
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rm -rf "$tmpdir/old_initramfs"
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rm -rf "$tmpdir/new_initramfs"
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mkdir "$tmpdir/old_initramfs"
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mkdir "$tmpdir/new_initramfs"
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pushd "$tmpdir/old_initramfs" >/dev/null
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zcat "$old_initramfs" | cpio -i 2>/dev/null
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n=0; for i in `find . -iname \*.ko|sort`; do
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old_initramfs_modules[n]="$i"
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n=$((n+1))
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done
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popd >/dev/null
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pushd "$tmpdir/new_initramfs" >/dev/null
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zcat "$new_initramfs" | cpio -i 2>/dev/null
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n=0; for i in `find . -iname \*.ko|sort`; do
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new_initramfs_modules[n]="$i"
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n=$((n+1))
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done
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popd >/dev/null
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if [ "${#old_initramfs_modules[@]}" == "${#new_initramfs_modules[@]}" ];
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then
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for ((n = 0; n < ${#old_initramfs_modules[@]}; n++)); do
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old_md5=`md5sum $tmpdir/old_initramfs/${old_initramfs_modules[n]}|sed -nre 's:(^\ )* .*:\1:p'`
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new_md5=`md5sum $tmpdir/new_initramfs/${new_initramfs_modules[n]}|sed -nre 's:(^\ )* .*:\1:p'`
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if [ ! "$old_md5" == "$new_md5" ];
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then
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return 1
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fi
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done
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else
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return 1
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fi
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return 0
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}
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# check_initramfs:
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# check and possibly also update the initramfs for changed kernels
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check_initramfs() {
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local kernel=$1
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# If there is no initramfs already we will not make one here.
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if [ -e "$initramfs_prefix/initramfs-$kernel.img" ];
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then
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old_initramfs="$initramfs_prefix/initramfs-$kernel.img"
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tmp_initramfs="$initramfs_prefix/initramfs-$kernel.tmp"
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new_initramfs="$initramfs_prefix/initramfs-$kernel.img"
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$dracut -f "$tmp_initramfs" "$kernel"
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if ! $(compare_initramfs_modules "$old_initramfs" "$tmp_initramfs");
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then
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doit mv "$tmp_initramfs" "$new_initramfs"
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else
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rm -f "$tmp_initramfs"
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fi
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fi
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}
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# krel_of_module:
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# Compute the kernel release of a module.
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krel_of_module() {
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declare module=$1
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/sbin/modinfo -F vermagic "$module" | awk '{print $1}'
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}
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# module_is_compatible:
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# Determine if a module is compatible with a particular kernel release. Also
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# include any symbol deps that might be introduced by other external kmods.
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module_is_compatible() {
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declare module=$1 krel=$2 module_krel=$(krel_of_module "$module")
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if [ ! -e "$tmpdir/all-symvers-$krel-$module_krel" ]; then
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# Symbols exported by the "new" kernel
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if [ ! -e $tmpdir/symvers-$krel ]; then
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if [ -e /boot/symvers-$krel.gz ]; then
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zcat /boot/symvers-$krel.gz \
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| sed -r -ne 's:^(0x[0]*[0-9a-f]{8}\t[0-9a-zA-Z_]+)\t.*:\1:p'
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fi > $tmpdir/symvers-$krel
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fi
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# Symbols that other add-on modules of the "old" kernel export
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# (and that this module may require)
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if [ ! -e "$tmpdir/extra-symvers-$module_krel" ]; then
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if [ -e /lib/modules/$module_krel/extra ] && \
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[ -n "`find /lib/modules/$module_krel/extra -type f`" ]; then
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find /lib/modules/$module_krel/extra -name '*.ko' \
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| xargs nm \
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| sed -nre 's:^[0]*([0-9a-f]{8}) A __crc_(.*):0x\1 \2:p'
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fi > $tmpdir/extra-symvers-$module_krel
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fi
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sort -u $tmpdir/symvers-$krel $tmpdir/extra-symvers-$module_krel \
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> "$tmpdir/all-symvers-$krel-$module_krel"
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fi
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# If the module does not have modversions enabled, $tmpdir/modvers
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# will be empty.
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/sbin/modprobe --dump-modversions "$module" \
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| sed -r -e 's:^(0x[0]*[0-9a-f]{8}\t.*):\1:' \
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| sort -u \
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> $tmpdir/modvers
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# Only include lines of the second file in the output that don't
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# match lines in the first file. (The default separator is
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# <space>, so we are matching the whole line.)
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join -j 1 -v 2 $tmpdir/all-symvers-$krel-$module_krel \
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$tmpdir/modvers > $tmpdir/join
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if [ ! -s $tmpdir/modvers ]; then
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echo "Warning: Module ${module##*/} from kernel $module_krel has no" \
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"modversions, so it cannot be reused for kernel $krel" >&2
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elif [ -s $tmpdir/join ]; then
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[ -n "$verbose" ] &&
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echo "Module ${module##*/} from kernel $module_krel is not compatible" \ "with kernel $krel in symbols:" $(sed -e 's:.* ::' $tmpdir/join)
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else
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[ -n "$verbose" ] &&
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echo "Module ${module##*/} from kernel $module_krel is compatible" \
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"with kernel $krel"
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return 0
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fi
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return 1
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}
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usage() {
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echo "Usage: ${0##*/} [options] {--add-modules|--remove-modules}"
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echo "${0##*/} [options] {--add-kernel|--remove-kernel} {kernel-release}"
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cat <<'EOF'
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--add-modules
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Add a list of modules read from standard input. Create
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symlinks in compatible kernel's weak-updates/ directory.
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The list of modules is read from standard input.
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--remove-modules
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Remove compatibility symlinks from weak-updates/ directories
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for a list of modules. The list of modules is read from
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standard input. Optionally specify --delete-modules to
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prevent weak-modules from attempting to locate any
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compatible modules to replace those being removed.
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--add-kernel
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Add compatibility symlinks for all compatible modules to the
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specified or running kernel.
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--remove-kernel
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Remove all compatibility symlinks for the specified or current
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kernel.
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--no-initramfs
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Do not generate an initramfs.
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--verbose
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Print the commands executed.
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--dry-run
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Do not create/remove any files.
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EOF
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exit $1
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}
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# module_has_changed:
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# Mark if an actual change occured that we need to deal with later by calling
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# depmod or mkinitramfs against the affected kernel.
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module_has_changed() {
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declare module=$1 krel=$2
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module=${module%.ko}
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module=${module##*/}
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eval "changed_modules_${krel//[^a-zA-Z0-9]/_}=$krel"
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eval "changed_initramfs_${krel//[^a-zA-Z0-9]/_}=$krel"
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}
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# add_modules:
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# Read in a list of modules from stdinput and process them for compatibility
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# with installed kernels under /lib/modules.
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add_modules() {
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read_modules_list || exit 1
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if [ ${#modules[@]} -gt 0 ]; then
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for krel in $(ls /lib/modules/); do
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[ -e "/boot/symvers-$krel.gz" ] || continue
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for ((n = 0; n < ${#modules[@]}; n++)); do
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module="${modules[n]}"
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module_krel="${module_krels[n]}"
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case "$module" in
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/lib/modules/$krel/*)
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# Module was built against this kernel, update initramfs.
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module_has_changed $module $krel
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continue ;;
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esac
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# Module my also serve as a weak-update built against another
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# kernel. We need to create symlinks for compatible kernels
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# under /lib/modules and rerun depmod/dracut for those.
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subpath=`echo $module | sed -nre "s:/lib/modules/$module_krel/([^/]*)/(.*):\2:p"`
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weak_module="/lib/modules/$krel/weak-updates/${subpath#/}"
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if [ -r "$weak_module" ]; then
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weak_krel=$(krel_of_module "$weak_module")
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if [ "$weak_krel" != "$module_krel" ] &&
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[ "$(printf "%s\n" "$weak_krel" "$module_krel" \
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| rpmsort | (read input; echo "$input"; \
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while read input; do true; done))" = \
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"$module_krel" ]; then
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# Keep modules from more recent kernels.
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[ -n "$verbose" ] && echo \
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"Keeping module ${module##*/} from kernel $weak_krel for kernel $krel"
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continue
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fi
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fi
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if module_is_compatible $module $krel; then
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doit mkdir -p $(dirname $weak_module)
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doit ln -sf $module $weak_module
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# Module was built against another kernel, update initramfs.
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module_has_changed $module $krel
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fi
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done
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done
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fi
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}
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# remove_modules:
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# Read in a list of modules from stdinput and process them for removal.
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# Parameter is noreplace to delete modules, otherwise link compat.
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remove_modules() {
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delete_modules=${1:-replace}
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read_modules_list || exit 1
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if [ ${#modules[@]} -gt 0 ]; then
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# Hunt for all known users of this module in /lib/modules, remove them
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# and create symlinks to other compatible modules (downgrade) if
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# possible, update initramfs for each modified kernel too.
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krels=($(ls /lib/modules/ | rpmsort -r))
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for krel in "${krels[@]}"; do
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[ -e "/boot/symvers-$krel.gz" ] || continue
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for ((n = 0; n < ${#modules[@]}; n++)); do
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module="${modules[n]}"
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module_krel="${module_krels[n]}"
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# Module is going to be removed, update initramfs.
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module_has_changed $module $krel
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subpath="${module#/lib/modules/$module_krel/extra}"
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weak_module="/lib/modules/$krel/weak-updates/${subpath#/}"
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if [ "$module" == "`readlink $weak_module`" ]; then
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[ -n "$verbose" ] && echo \
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"Removing compatible module ${module##*/} from kernel $krel"
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doit rm -f "$weak_module"
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if [ "replace" == "$delete_modules" ]; then
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for krel2 in "${krels[@]}"; do
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if [ $krel2 != $krel ]; then
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module="/lib/modules/$krel2/extra/${subpath#/}"
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[ -e "$module" ] || continue
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if module_is_compatible "$module" "$krel"; then
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[ -n "$verbose" ] && echo \
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"Adding compatible module ${module##*/} from kernel $krel2 instead"
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doit ln -s "$module" "$weak_module"
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module_has_changed $module $krel
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break
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fi
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fi
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done
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fi
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doit rmdir --parents --ignore-fail-on-non-empty \
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"$(dirname "$weak_module")"
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fi
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done
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done
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fi
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}
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add_kernel() {
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add_krel=${1:-$(uname -r)}
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if [ ! -e "/boot/symvers-$add_krel.gz" ]; then
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echo "Symvers dump file /boot/symvers-$add_krel.gz" \
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"not found" >&2
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exit 1
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fi
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for krel in $(ls /lib/modules/ | rpmsort -r); do
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[ "$add_krel" = "$krel" ] && continue
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[ -d /lib/modules/$krel/extra ] || continue
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for module in $(find /lib/modules/$krel/extra -name '*.ko'); do
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subpath="${module#/lib/modules/$krel/extra}"
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weak_module="/lib/modules/$add_krel/weak-updates/${subpath#/}"
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[ -e "$weak_module" ] && continue
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if module_is_compatible $module $add_krel; then
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module_has_changed $module $add_krel
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doit mkdir -p $(dirname $weak_module)
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doit ln -sf $module $weak_module
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fi
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done
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done
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}
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remove_kernel() {
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remove_krel=${1:-$(uname -r)}
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weak_modules="/lib/modules/$remove_krel/weak-updates"
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module_has_changed $weak_modules $remove_krel
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doit rm -rf "$weak_modules"
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}
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################################################################################
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################################## MAIN GUTS ###################################
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################################################################################
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options=`getopt -o h --long help,add-modules,remove-modules \
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--long add-kernel,remove-kernel \
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--long dry-run,no-initramfs,verbose,delete-modules -- "$@"`
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[ $? -eq 0 ] || usage 1
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eval set -- "$options"
|
||||
|
||||
while :; do
|
||||
case "$1" in
|
||||
--add-modules)
|
||||
do_add_modules=1
|
||||
;;
|
||||
--remove-modules)
|
||||
do_remove_modules=1
|
||||
;;
|
||||
--add-kernel)
|
||||
do_add_kernel=1
|
||||
;;
|
||||
--remove-kernel)
|
||||
do_remove_kernel=1
|
||||
;;
|
||||
--dry-run)
|
||||
dry_run=1
|
||||
;;
|
||||
--no-initramfs)
|
||||
no_initramfs=1
|
||||
;;
|
||||
--verbose)
|
||||
verbose=1
|
||||
;;
|
||||
--delete-modules)
|
||||
do_delete_modules=1
|
||||
;;
|
||||
-h|--help)
|
||||
usage 0
|
||||
;;
|
||||
--)
|
||||
shift
|
||||
break
|
||||
;;
|
||||
esac
|
||||
shift
|
||||
done
|
||||
|
||||
if [ -n "$do_add_modules" ]; then
|
||||
add_modules
|
||||
|
||||
elif [ -n "$do_remove_modules" ]; then
|
||||
if [ -n "$do_delete_modules" ]; then
|
||||
remove_modules "noreplace"
|
||||
else
|
||||
remove_modules
|
||||
fi
|
||||
|
||||
elif [ -n "$do_add_kernel" ]; then
|
||||
kernel=${1:-$(uname -r)}
|
||||
add_kernel $kernel
|
||||
|
||||
elif [ -n "$do_remove_kernel" ]; then
|
||||
kernel=${1:-$(uname -r)}
|
||||
remove_kernel $kernel
|
||||
|
||||
exit 0
|
||||
else
|
||||
usage 1
|
||||
fi
|
||||
|
||||
################################################################################
|
||||
###################### CLEANUP POST ADD/REMOVE MODULE/KERNEL ###################
|
||||
################################################################################
|
||||
|
||||
# run depmod and dracut as needed
|
||||
for krel in ${!changed_modules_*}; do
|
||||
krel=${!krel}
|
||||
|
||||
doit /sbin/depmod -ae -F /boot/System.map-$krel $krel
|
||||
done
|
||||
|
||||
for krel in ${!changed_initramfs_*}; do
|
||||
krel=${!krel}
|
||||
|
||||
if [ ! -n "$no_initramfs" ]; then
|
||||
check_initramfs $krel
|
||||
fi
|
||||
done
|
||||
Loading…
Reference in New Issue
Block a user