diff options
Diffstat (limited to 'package/block-extroot')
| -rw-r--r-- | package/block-extroot/Config.in | 17 | ||||
| -rw-r--r-- | package/block-extroot/Makefile | 64 | ||||
| -rw-r--r-- | package/block-extroot/files/50_determine_usb_root | 50 | ||||
| -rw-r--r-- | package/block-extroot/files/60_pivot_usb_root | 20 | ||||
| -rw-r--r-- | package/block-extroot/files/extmount.sh | 24 |
5 files changed, 175 insertions, 0 deletions
diff --git a/package/block-extroot/Config.in b/package/block-extroot/Config.in new file mode 100644 index 000000000..dbf1041c1 --- /dev/null +++ b/package/block-extroot/Config.in @@ -0,0 +1,17 @@ +# +# Copyright (C) 2010 Vertical Communications +# +# This is free software, licensed under the GNU General Public License v2. +# See /LICENSE for more information. +# + +config EXTROOT_SETTLETIME + int + prompt "Settle time for root block device (s)" if PACKAGE_block-extroot + default 20 + help + This is the amount of time, in seconds, to wait for the block device + the root filesystem is on to become available, after the kernel that + modules for the rootfs and device are loaded. + + diff --git a/package/block-extroot/Makefile b/package/block-extroot/Makefile new file mode 100644 index 000000000..1ae72f0d3 --- /dev/null +++ b/package/block-extroot/Makefile @@ -0,0 +1,64 @@ +# +# Copyright (C) 2009 OpenWrt.org +# Copyright (C) 2010 Vertical Communications +# +# This is free software, licensed under the GNU General Public License v2. +# See /LICENSE for more information. +# + +include $(TOPDIR)/rules.mk + +PKG_NAME:=block-extroot +PKG_VERSION:=0.0.1 +PKG_RELEASE:=1 + +PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME) + +include $(INCLUDE_DIR)/package.mk + +define Package/block-extroot/Default + SECTION:=utils + CATEGORY:=Utilities + TITLE:=root filesystem on secondary storage + SUBMENU:=disc +endef + +define Package/block-extroot + $(call Package/block-extroot/Default) + MENU:=1 + DEPENDS:=+block-mount @PACKAGE_kmod-ide-core||PACKAGE_kmod-usb-storage||PACKAGE_kmod-mmc +endef + +define Package/block-extroot/config + source "$(SOURCE)/Config.in" +endef + +define Package/block-extroot/description + Based on the moduluarized preinit and firstboot, adds the option to have + the root filesystem on storage other than the jffs or the boot root device. + For a squashfs image this package must be installed into the image, not as + a package to add later. +endef + +define Build/Prepare +endef + +define Build/Configure +endef + +define Build/Compile +endef + +define Package/block-extroot/install + $(INSTALL_DIR) $(1)/lib/functions + $(INSTALL_DATA) ./files/extmount.sh $(1)/lib/functions/ + $(INSTALL_DIR) $(1)/lib/preinit + $(INSTALL_DATA) ./files/50_determine_usb_root $(1)/lib/preinit/ + $(INSTALL_DATA) ./files/60_pivot_usb_root $(1)/lib/preinit/ + $(INSTALL_DIR) $(1)/lib/preinit + echo "extroot_settle_time=\"$(CONFIG_EXTROOT_SETTLETIME)\"" >$(1)/lib/preinit/00_extroot.conf + $(INSTALL_DIR) $(1)/overlay +endef + +$(eval $(call BuildPackage,block-extroot)) + diff --git a/package/block-extroot/files/50_determine_usb_root b/package/block-extroot/files/50_determine_usb_root new file mode 100644 index 000000000..1e5f153b6 --- /dev/null +++ b/package/block-extroot/files/50_determine_usb_root @@ -0,0 +1,50 @@ +#!/bin/sh +# Copyright (C) 2010 Vertical Communications +# This is free software, licensed under the GNU General Public License v2. +# See /LICENSE for more information. + + +. /etc/functions.sh +. /lib/functions/extmount.sh +. /lib/functions/mount.sh + +determine_external_root() { + local OLD_UCI_CONFIG_DIR="$UCI_CONFIG_DIR" + set_jffs_mp + determine_root_device + + # extroot requires extroot and fstab config files, therefore + # we assume configuration is incomplete and not to be used if either of them + # is missing (for jffs versions of these files on squashfs image) + if [ "$jffs" = "/jffs" ] && [ -r "/jffs/etc/config/fstab" ]; then + UCI_CONFIG_DIR="/jffs/etc/config" + ER_IS_SQUASHFS=true + fi + + # For squashfs on firstboot root_device will be tmpfs for the ramoverlay, + # unless there is a saved config, in which case it will be /dev/root, + # however in the case of a saved config, it won't be restored until after + # this script, so there won't be a config on the first boot after + # flashing a squashfs-based filesystem + # For ext2, ramdisk, or jffs2 root filesystems root_device is /dev/root + # For squashfs after firstboot, root filesystem is /dev/root + # We only use the config from the root or jffs if the root_device is + # /dev/root + [ "$root_device" = "/dev/root" ] && { + er_load_modules + [ -n "$extroot_settle_time" ] && [ "$extroot_settle_time" -gt 0 ] && { + sleep $extroot_settle_time + } + config_load fstab + config_foreach config_mount_by_section mount 1 + + [ "$rootfs_found" = "1" ] && grep -q /overlay /proc/mounts && { + pi_extroot_mount_success=true + pi_mount_skip_next=false + } + } + UCI_CONFIG_DIR="$OLD_UCI_CONFIG_DIR" +} + +boot_hook_add preinit_mount_root determine_external_root + diff --git a/package/block-extroot/files/60_pivot_usb_root b/package/block-extroot/files/60_pivot_usb_root new file mode 100644 index 000000000..c8572a35f --- /dev/null +++ b/package/block-extroot/files/60_pivot_usb_root @@ -0,0 +1,20 @@ +#!/bin/sh +# Copyright (C) 2010 Vertical Communications + +# This is free software, licensed under the GNU General Public License v2. +# See /LICENSE for more information. + +# Determine if we are requested to mount external root + +external_root_pivot() { + check_skip || [ "$pi_extroot_mount_success" != "true" ] || { + echo "switching to external rootfs" + if [ "$ER_IS_SQUASHFS" = "true" ]; then + umount /jffs + fi + mount -o remount,ro / && fopivot /overlay /rom && pi_mount_skip_next=true + } +} + +boot_hook_add preinit_mount_root external_root_pivot + diff --git a/package/block-extroot/files/extmount.sh b/package/block-extroot/files/extmount.sh new file mode 100644 index 000000000..dfd6eef07 --- /dev/null +++ b/package/block-extroot/files/extmount.sh @@ -0,0 +1,24 @@ +#!/bin/sh +# Copyright 2010 Vertical Communications + +# This is free software, licensed under the GNU General Public License v2. +# See /LICENSE for more information. + +determine_root_device() { + root_device="$(mount | grep ' / ' | cut -f1 -d\ | grep -v rootfs )" +} + +set_jffs_mp() { + jffs="$(awk '/jffs2/ {print $2}' /proc/mounts)" +} + +er_load_modules() { + [ -d $ER_ROOT/etc/modules.d ] && { + cd $ER_ROOT/etc/modules.d && { + local modules="$(grep -l '# May be required for rootfs' *)" + cat $modules | sed 's/^\([^#]\)/insmod \1/' | sh 2>&- || : + } + } +} + + |