diff options
7 files changed, 401 insertions, 0 deletions
diff --git a/meta/recipes-core/initrdscripts/initramfs-framework/debug b/meta/recipes-core/initrdscripts/initramfs-framework/debug new file mode 100644 index 000000000..00bfd7d3f --- /dev/null +++ b/meta/recipes-core/initrdscripts/initramfs-framework/debug @@ -0,0 +1,82 @@ +#!/bin/sh +# Copyright (C) 2011 O.S. Systems Software LTDA. +# Licensed on MIT + +# Adds support to dynamic debugging of initramfs using bootparam in +# following format: +# shell : starts a shell before and after each module +# shell=before:<module> : starts a shell before <module> is loaded and run +# shell=after:<module> : starts a shell after <module> is loaded and run +# +# shell-debug : run set -x as soon as possible +# shell-debug=before:<module> : run set -x before <module> is loaded and run +# shell-debug=after:<module> : run set -x after <module> is loaded and run + +DEBUG_SHELL="false" + +debug_hook_handler() { + status=$1 + module=$2 + + if [ -n "$bootparam_shell" ] && [ "$bootparam_shell" != "true" ]; then + shell_wanted_status=`expr $bootparam_shell : '\(.*\):.*'` + shell_wanted_module=`expr $bootparam_shell : '.*:\(.*\)'` + + if [ "$shell_wanted_status" = "before" ]; then + shell_wanted_status=pre + else + shell_wanted_status=post + fi + fi + + if [ "$bootparam_shell" = "true" ] || + ( [ "$status" = "$shell_wanted_status" ] && + [ "$module" = "$shell_wanted_module" ] ); then + if [ "$status" = "pre" ]; then + status_msg="before" + else + status_msg="after" + fi + + msg "Starting shell $status_msg $module..." + sh + fi + + if [ -n "$bootparam_shell_debug" ] && [ "$bootparam_shell_debug" != "true" ]; then + shell_debug_wanted_status=`expr $bootparam_shell_debug : '\(.*\):.*'` + shell_debug_wanted_module=`expr $bootparam_shell_debug : '.*:\(.*\)'` + + if [ "$shell_debug_wanted_status" = "before" ]; then + shell_debug_wanted_status=pre + else + shell_debug_wanted_status=post + fi + fi + + if [ "$bootparam_shell_debug" = "true" ] || + ( [ "$status" = "$shell_debug_wanted_status" ] && + [ "$module" = "$shell_debug_wanted_module" ] ); then + if [ "$DEBUG_SHELL" = "true" ]; then + return 0 + fi + + if [ "$status" = "pre" ]; then + status_msg="before" + else + status_msg="after" + fi + + msg "Starting shell debugging $status_msg $module..." + DEBUG_SHELL="true" + set -x + fi +} + +debug_enabled() { + return 0 +} + +debug_run() { + add_module_pre_hook "debug_hook_handler" + add_module_post_hook "debug_hook_handler" +} diff --git a/meta/recipes-core/initrdscripts/initramfs-framework/e2fs b/meta/recipes-core/initrdscripts/initramfs-framework/e2fs new file mode 100755 index 000000000..29f801a7b --- /dev/null +++ b/meta/recipes-core/initrdscripts/initramfs-framework/e2fs @@ -0,0 +1,28 @@ +#!/bin/sh +# Copyright (C) 2011 O.S. Systems Software LTDA. +# Licensed on MIT + +e2fs_enabled() { + return 0 +} + +e2fs_run() { + filesystems="ext4 ext3 ext2" + + # load modules + for fs in $filesystems; do + load_kernel_module $fs + done + + for fs in $filesystems; do + eval "fs_options=\$bootparam_${fs}" + if [ -n "$fs_options" ]; then + dev=`expr "$fs_options" : '\([^:]*\).*'` + path=`expr "$fs_options" : '[^:]*:\([^:]*\).*'` + + info "Mounting $dev as $fs on $path as $fs..." + mkdir -p $path + mount -t $fs $dev $path + fi + done +} diff --git a/meta/recipes-core/initrdscripts/initramfs-framework/finish b/meta/recipes-core/initrdscripts/initramfs-framework/finish new file mode 100755 index 000000000..bedd803f1 --- /dev/null +++ b/meta/recipes-core/initrdscripts/initramfs-framework/finish @@ -0,0 +1,46 @@ +#!/bin/sh +# Copyright (C) 2011 O.S. Systems Software LTDA. +# Licensed on MIT + +finish_enabled() { + return 0 +} + +finish_run() { + if [ -n "$ROOTFS_DIR" ]; then + if [ -n "$bootparam_rootdelay" ]; then + debug "Sleeping for $rootdelay second(s) to wait root to settle..." + sleep $bootparam_rootdelay + fi + + if [ -n "$bootparam_root" ]; then + debug "No e2fs compatible filesystem has been mounted, mounting $bootparam_root..." + + if [ "${bootparam_root:0:5}" = "UUID=" ]; then + bootparam_root="/dev/disk/by-uuid/${bootparam_root/UUID=/}" + fi + + if [ -e "$bootparam_root" ]; then + mount $bootparam_root $ROOTFS_DIR + else + debug "root '$bootparam_root' doesn't exist." + fi + fi + + if [ ! -d $ROOTFS_DIR/dev ]; then + fatal "ERROR: There's no '/dev' on rootfs." + fi + + info "Switching root to '$ROOTFS_DIR'..." + + debug "Moving /dev, /proc and /sys onto rootfs..." + mount --move /dev $ROOTFS_DIR/dev + mount --move /proc $ROOTFS_DIR/proc + mount --move /sys $ROOTFS_DIR/sys + + cd $ROOTFS_DIR + exec switch_root -c /dev/console $ROOTFS_DIR /sbin/init + else + debug "No rootfs has been set" + fi +} diff --git a/meta/recipes-core/initrdscripts/initramfs-framework/init b/meta/recipes-core/initrdscripts/initramfs-framework/init new file mode 100755 index 000000000..fc4b0db4b --- /dev/null +++ b/meta/recipes-core/initrdscripts/initramfs-framework/init @@ -0,0 +1,136 @@ +#!/bin/sh +# Copyright (C) 2011 O.S. Systems Software LTDA. +# Licensed on MIT +# +# Provides the API to be used by the initramfs modules +# +# Modules need to provide the following functions: +# +# <module>_enabled : check if the module ought to run (return 1 to skip) +# <module>_run : do what is need +# +# Boot parameters are available on environment in the as: +# +# 'foo=value' as 'bootparam_foo=value' +# 'foo' as 'bootparam_foo=true' + +# Register a function to be called before running a module +# The hook is called as: +# <function> pre <module> +add_module_pre_hook() { + MODULE_PRE_HOOKS="$MODULE_PRE_HOOKS $1" +} + +# Register a function to be called after running a module +# The hook is called as: +# <function> post <module> +add_module_post_hook() { + MODULE_POST_HOOKS="$MODULE_POST_HOOKS $1" +} + +# Load kernel module +load_kernel_module() { + if modprobe $1 >/dev/null 2>&1; then + info "Loaded module $1" + else + debug "Failed to load module $1" + fi +} + +# Prints information +msg() { + echo "$@" >/dev/console +} + +# Prints information if verbose bootparam is used +info() { + [ -n "$bootparam_verbose" ] && echo "$@" >/dev/console +} + +# Prints information if debug bootparam is used +debug() { + [ -n "$bootparam_debug" ] && echo "DEBUG: $@" >/dev/console +} + +# Prints a message and start a endless loop +fatal() { + echo $1 >/dev/console + echo >/dev/console + + while [ "true" ]; do + sleep 3600 + done +} + +# Variables shared amoung modules +ROOTFS_DIR="/rootfs" # where to do the switch root +MODULE_PRE_HOOKS="" # functions to call before running each module +MODULE_POST_HOOKS="" # functions to call after running each module +MODULES_DIR=/init.d # place to look for modules + +# initialize /proc and /sys +mkdir -p /proc /sys +mount -t proc proc /proc +mount -t sysfs sysfs /sys + +# populate bootparam environment +for p in `cat /proc/cmdline`; do + opt="${p%%=*}" + opt=${opt/-/_} + if [ "${p/=/}" = "$p" ]; then + eval "bootparam_${opt}=true" + else + eval "bootparam_${opt}=\"${p#*=}\"" + fi +done + +# use /dev with devtmpfs +if grep -q devtmpfs /proc/filesystems; then + mkdir -p /dev + mount -t devtmpfs devtmpfs /dev +else + if [ ! -d /dev ]; then + fatal "ERROR: /dev doesn't exist and kernel doesn't has devtmpfs enabled." + fi +fi + +mkdir $ROOTFS_DIR + +# Load and run modules +for m in $MODULES_DIR/*; do + # Skip backup files + if [ "${m/\~/}" != "$m" ]; then + continue + fi + + module=`basename $m | cut -d'-' -f 2` + debug "Loading module $module" + + # pre hooks + for h in $MODULE_PRE_HOOKS; do + debug "Calling module hook (pre): $h" + eval "$h pre $module" + debug "Finished module hook (pre): $h" + done + + # process module + source $m + + if ! eval "${module}_enabled"; then + debug "Skipping module $module" + continue + fi + + debug "Running ${module}_run" + eval "${module}_run" + + # post hooks + for h in $MODULE_POST_HOOKS; do + debug "Calling module hook (post): $h" + eval "$h post $module" + debug "Finished module hook (post): $h" + done +done + +# Catch all +fatal "ERROR: Initramfs failed to initialize the system." diff --git a/meta/recipes-core/initrdscripts/initramfs-framework/mdev b/meta/recipes-core/initrdscripts/initramfs-framework/mdev new file mode 100644 index 000000000..a5df1d717 --- /dev/null +++ b/meta/recipes-core/initrdscripts/initramfs-framework/mdev @@ -0,0 +1,30 @@ +#!/bin/sh +# Copyright (C) 2011 O.S. Systems Software LTDA. +# Licensed on MIT + +mdev_enabled() { + if [ ! -e /sbin/mdev ]; then + debug "/sbin/mdev doesn't exist" + return 1 + fi + + return 0 +} + +mdev_run() { + # setup the environment + mount -t tmpfs tmpfs /dev + + mkdir -m 1777 /dev/shm + + mkdir -m 0755 /dev/pts + mount -t devpts devpts /dev/pts + + echo /sbin/mdev > /proc/sys/kernel/hotplug + mdev -s + + # load modules for devices + find /sys -name modalias | while read m; do + load_kernel_module $(cat $m) + done +} diff --git a/meta/recipes-core/initrdscripts/initramfs-framework/udev b/meta/recipes-core/initrdscripts/initramfs-framework/udev new file mode 100644 index 000000000..9ea8aa364 --- /dev/null +++ b/meta/recipes-core/initrdscripts/initramfs-framework/udev @@ -0,0 +1,22 @@ +#!/bin/sh +# Copyright (C) 2011 O.S. Systems Software LTDA. +# Licensed on MIT + +udev_enabled() { + if [ ! -e /sbin/udevd ]; then + debug "/sbin/udev doesn't exist" + return 1 + fi + + return 0 +} + +udev_run() { + mkdir -p /run + + udevd --daemon > /dev/null + udevadm trigger --action=add + udevadm settle + + killall udevd 2>/dev/null +} diff --git a/meta/recipes-core/initrdscripts/initramfs-framework_1.0.bb b/meta/recipes-core/initrdscripts/initramfs-framework_1.0.bb new file mode 100644 index 000000000..58e41d4d4 --- /dev/null +++ b/meta/recipes-core/initrdscripts/initramfs-framework_1.0.bb @@ -0,0 +1,57 @@ +DESCRIPTION = "initramfs modular system" +LICENSE = "MIT" +LIC_FILES_CHKSUM = "file://${COREBASE}/meta/COPYING.MIT;md5=3da9cfbcb788c80a0384361b4de20420" +RDEPENDS = "busybox" + +inherit allarch + +SRC_URI = "file://init \ + file://finish \ + file://mdev \ + file://udev \ + file://e2fs \ + file://debug" + +do_install() { + install -d ${D}/init.d + + # base + install -m 0755 ${WORKDIR}/init ${D}/init + install -m 0755 ${WORKDIR}/finish ${D}/init.d/99-finish + + # mdev + install -m 0755 ${WORKDIR}/mdev ${D}/init.d/01-mdev + + # udev + install -m 0755 ${WORKDIR}/udev ${D}/init.d/01-udev + + # e2fs + install -m 0755 ${WORKDIR}/e2fs ${D}/init.d/10-e2fs + + # debug + install -m 0755 ${WORKDIR}/debug ${D}/init.d/00-debug +} + +PACKAGES = "${PN}-base \ + initramfs-module-mdev \ + initramfs-module-udev \ + initramfs-module-e2fs \ + initramfs-module-debug" + +FILES_${PN}-base = "/init /init.d/99-finish" + +DESCRIPTION_initramfs-module-mdev = "initramfs support for mdev" +RDEPENDS_initramfs-module-mdev = "${PN}-base" +FILES_initramfs-module-mdev = "/init.d/01-mdev" + +DESCRIPTION_initramfs-module-udev = "initramfs support for udev" +RDEPENDS_initramfs-module-udev = "${PN}-base udev udev-utils" +FILES_initramfs-module-udev = "/init.d/01-udev" + +DESCRIPTION_initramfs-module-e2fs = "initramfs support for ext4/ext3/ext2 filesystems" +RDEPENDS_initramfs-module-e2fs = "${PN}-base" +FILES_initramfs-module-e2fs = "/init.d/10-e2fs" + +DESCRIPTION_initramfs-module-debug = "initramfs dynamic debug support" +RDEPENDS_initramfs-module-debug = "${PN}-base" +FILES_initramfs-module-debug = "/init.d/00-debug" |