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authorDaniel Dickinson <daniel@cshore.neomailbox.net>2010-12-03 20:01:23 +0000
committerDaniel Dickinson <daniel@cshore.neomailbox.net>2010-12-03 20:01:23 +0000
commit52c4334c1173418c07996c49b80cf3fd06b50bde (patch)
tree19b741f8ab573440129f9c1632ccae4029608041 /package
parent593c917377f85a829b1b2f4015149c37b22df806 (diff)
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[package] block-extroot: Added md5sum to extroot and underlying root filesystem. This is used to ensure that the extroot is not mounted as the rootfs after a sysupgrade *until the user deals with the extroot).
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@24230 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'package')
-rw-r--r--package/block-extroot/Makefile1
-rw-r--r--package/block-extroot/files/50_determine_usb_root1
-rw-r--r--package/block-extroot/files/55_determine_extroot_sysupgrade55
3 files changed, 57 insertions, 0 deletions
diff --git a/package/block-extroot/Makefile b/package/block-extroot/Makefile
index f1e093bcc3..05d5e18a1a 100644
--- a/package/block-extroot/Makefile
+++ b/package/block-extroot/Makefile
@@ -53,6 +53,7 @@ define Package/block-extroot/install
$(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/55_determine_extroot_sysupgrade $(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)\"" >$(1)/lib/preinit/00_extroot.conf
diff --git a/package/block-extroot/files/50_determine_usb_root b/package/block-extroot/files/50_determine_usb_root
index b899203e5d..e87855c2a7 100644
--- a/package/block-extroot/files/50_determine_usb_root
+++ b/package/block-extroot/files/50_determine_usb_root
@@ -18,6 +18,7 @@ determine_external_root() {
if [ "$jffs" = "/tmp/overlay" ] && [ -r "/tmp/overlay/etc/config/fstab" ]; then
UCI_CONFIG_DIR="/tmp/overlay/etc/config"
ER_IS_SQUASHFS=true
+ ER_OVERLAY_PREFIX="/tmp/overlay"
fi
# For squashfs on firstboot root_device will be tmpfs for the ramoverlay,
diff --git a/package/block-extroot/files/55_determine_extroot_sysupgrade b/package/block-extroot/files/55_determine_extroot_sysupgrade
new file mode 100644
index 0000000000..21af8b0180
--- /dev/null
+++ b/package/block-extroot/files/55_determine_extroot_sysupgrade
@@ -0,0 +1,55 @@
+#!/bin/sh
+# Copyright (C) 2010 Daniel Dickinson
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+
+
+check_set_md5sum() {
+ local er_md5sum_file
+ er_md5sum_file="${ER_OVERLAY_PREFIX}/.extroot.md5sum"
+
+ local er_extroot_md5sum
+ if [ -f $md5sum_file ]; then
+ er_extroot_md5sum="$(cat $er_md5sum_file)"
+ fi
+
+ local er_extroot_overlay_md5sum
+ if [ -f "/overlay/etc/extroot.md5sum" ]; then
+ er_extroot_overlay_md5sum="$(cat /overlay/.extroot.md5sum)"
+ fi
+
+ if [ -z "$er_extroot_overlay_md5sum" ]; then
+ cat $er_md5sum_file >/overlay/.extroot.md5sum
+ elif [ "$er_extroot_overlay_md5sum" != "$er_extroot_md5sum" ]; then
+ pi_extroot_mount_success="false"
+ mkdir -p /tmp/overlay-disabled
+ mount --move /overlay /tmp/overlay-disabled
+ fi
+}
+
+set_jffs_md5sum() {
+ # We do this anytime block-extroot exists, even on the first boot with
+ # no extroot defined.
+
+ local er_md5sum_file
+ er_md5sum_file="${ER_OVERLAY_PREFIX}/.extroot.md5sum"
+
+ local er_extroot_md5sum
+ if [ -f $er_md5sum_file ]; then
+ er_extroot_md5sum="$(cat $er_md5sum_file)"
+ fi
+ if [ -z "$er_extroot_md5sum" ]; then
+ dd if=/dev/urandom count=32 bs=1k 2>/dev/null | md5sum | cut -f1 -d\ >$er_md5sum_file
+ fi
+}
+
+determine_extroot_sysupgrade() {
+ check_skip || set_jffs_md5sum
+
+ check_skip || [ "$pi_extroot_mount_success" != "true" ] || {
+ check_set_md5sum
+ }
+}
+
+boot_hook_add preinit_mount_root determine_extroot_sysupgrade
+