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2d15516d40
efivafs contain some meta data about Intel VROC, which will be used by mdadm to create raid device. These are preparation work to support boot from Intel VROC RAID disk. (From OE-Core rev: b25869c76975bbcec8d2f22f680e58976ec4de5c) Signed-off-by: Liwei Song <liwei.song@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
151 lines
3.4 KiB
Bash
Executable File
151 lines
3.4 KiB
Bash
Executable File
#!/bin/sh
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# Copyright (C) 2011 O.S. Systems Software LTDA.
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# Licensed on MIT
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#
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# Provides the API to be used by the initramfs modules
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#
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# Modules need to provide the following functions:
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#
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# <module>_enabled : check if the module ought to run (return 1 to skip)
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# <module>_run : do what is need
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#
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# Boot parameters are available on environment in the as:
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#
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# 'foo=value' as 'bootparam_foo=value'
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# 'foo' as 'bootparam_foo=true'
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# 'foo.bar[=value] as 'foo_bar=[value|true]'
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# Register a function to be called before running a module
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# The hook is called as:
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# <function> pre <module>
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add_module_pre_hook() {
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MODULE_PRE_HOOKS="$MODULE_PRE_HOOKS $1"
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}
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# Register a function to be called after running a module
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# The hook is called as:
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# <function> post <module>
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add_module_post_hook() {
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MODULE_POST_HOOKS="$MODULE_POST_HOOKS $1"
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}
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# Load kernel module
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load_kernel_module() {
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if modprobe $1 >/dev/null 2>&1; then
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info "Loaded module $1"
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else
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debug "Failed to load module $1"
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fi
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}
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# Prints information
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msg() {
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echo "$@" >/dev/console
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}
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# Prints information if verbose bootparam is used
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info() {
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[ -n "$bootparam_verbose" ] && echo "$@" >/dev/console
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}
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# Prints information if debug bootparam is used
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debug() {
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[ -n "$bootparam_debug" ] && echo "DEBUG: $@" >/dev/console
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}
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# Prints a message and start a endless loop
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fatal() {
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echo $1 >/dev/console
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echo >/dev/console
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if [ -n "$bootparam_init_fatal_sh" ]; then
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sh
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else
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while [ "true" ]; do
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sleep 3600
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done
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fi
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}
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# Variables shared amoung modules
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ROOTFS_DIR="/rootfs" # where to do the switch root
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MODULE_PRE_HOOKS="" # functions to call before running each module
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MODULE_POST_HOOKS="" # functions to call after running each module
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MODULES_DIR=/init.d # place to look for modules
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EFI_DIR=/sys/firmware/efi # place to store device firmware information
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# make mount stop complaining about missing /etc/fstab
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touch /etc/fstab
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# initialize /proc, /sys, /run/lock and /var/lock
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mkdir -p /proc /sys /run/lock /var/lock
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mount -t proc proc /proc
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mount -t sysfs sysfs /sys
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if [ -d $EFI_DIR ];then
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mount -t efivarfs none /sys/firmware/efi/efivars
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fi
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# populate bootparam environment
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for p in `cat /proc/cmdline`; do
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opt=`echo $p | cut -d'=' -f1`
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opt=`echo $opt | sed -e 'y/.-/__/'`
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if [ "`echo $p | cut -d'=' -f1`" = "$p" ]; then
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eval "bootparam_${opt}=true"
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else
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value="`echo $p | cut -d'=' -f2-`"
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eval "bootparam_${opt}=\"${value}\""
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fi
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done
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# use /dev with devtmpfs
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if grep -q devtmpfs /proc/filesystems; then
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mkdir -p /dev
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mount -t devtmpfs devtmpfs /dev
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else
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if [ ! -d /dev ]; then
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fatal "ERROR: /dev doesn't exist and kernel doesn't has devtmpfs enabled."
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fi
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fi
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mkdir $ROOTFS_DIR
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# Load and run modules
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for m in $MODULES_DIR/*; do
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# Skip backup files
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if [ "`echo $m | sed -e 's/\~$//'`" != "$m" ]; then
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continue
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fi
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module=`basename $m | cut -d'-' -f 2`
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debug "Loading module $module"
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# pre hooks
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for h in $MODULE_PRE_HOOKS; do
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debug "Calling module hook (pre): $h"
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eval "$h pre $module"
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debug "Finished module hook (pre): $h"
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done
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# process module
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. $m
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if ! eval "${module}_enabled"; then
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debug "Skipping module $module"
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continue
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fi
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debug "Running ${module}_run"
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eval "${module}_run"
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# post hooks
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for h in $MODULE_POST_HOOKS; do
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debug "Calling module hook (post): $h"
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eval "$h post $module"
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debug "Finished module hook (post): $h"
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done
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done
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# Catch all
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fatal "ERROR: Initramfs failed to initialize the system."
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