add sysupgrade script for config preserving system upgrades. only implemented for x86-2.6 at the moment, but can be ported to other platforms easily

SVN-Revision: 8456
This commit is contained in:
Felix Fietkau 2007-08-21 18:23:57 +00:00
parent ba05b57573
commit 1e38527a52
6 changed files with 284 additions and 3 deletions

View file

@ -60,6 +60,14 @@ echo "$HOTPLUG" > /proc/sys/kernel/hotplug
eval ${FAILSAFE:+failsafe}
lock -w /tmp/.failsafe
mount_root
[ -f /sysupgrade.tgz ] && {
echo "- config restore -"
cd /
mv sysupgrade.tgz /tmp
tar xzf /tmp/sysupgrade.tgz
rm -f /tmp/sysupgrade.tgz
sync
}
echo "- init -"

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@ -0,0 +1,151 @@
#!/bin/sh
RAM_ROOT=/tmp/root
ldd() { LD_TRACE_LOADED_OBJECTS=1 $*; }
libs() { ldd $* | awk '{print $3}'; }
install_file() { # <file> [ <file> ... ]
for file in "$@"; do
dest="$RAM_ROOT/$file"
[ -f $file -a ! -f $dest ] && {
dir="$(dirname $dest)"
mkdir -p "$dir"
cp $file $dest
}
done
}
install_bin() { # <file> [ <symlink> ... ]
src=$1
files=$1
[ -x "$src" ] && files="$src $(libs $src)"
install_file $files
shift
for link in "$@"; do {
dest="$RAM_ROOT/$link"
dir="$(dirname $dest)"
mkdir -p "$dir"
[ -f "$dest" ] || ln -s $src $dest
}; done
}
pivot() { # <new_root> <old_root>
mount | grep "on $1 type" 2>&- 1>&- || mount -o bind $1 $1
mkdir -p $1$2 $1/proc $1/dev $1/tmp $1/jffs && \
mount -o move /proc $1/proc && \
pivot_root $1 $1$2 || {
umount $1 $1
return 1
}
mount -o move $2/dev /dev
mount -o move $2/tmp /tmp
mount -o move $2/jffs /jffs 2>&-
return 0
}
run_ramfs() { # <command> [...]
install_bin /bin/busybox /bin/ash /bin/sh /bin/mount /bin/umount /sbin/pivot_root /usr/bin/wget /sbin/reboot /bin/sync /bin/dd /bin/grep /bin/cp /bin/mv /bin/tar /usr/bin/md5sum "/usr/bin/[" /bin/vi
install_bin /sbin/mtd
for file in $RAMFS_COPY_BIN; do
install_bin $file
done
install_file /etc/resolv.conf /etc/functions.sh /lib/upgrade/*.sh $RAMFS_COPY_DATA
pivot $RAM_ROOT /mnt || {
echo "Failed to switch over to ramfs. Please reboot."
exit 1
}
mount -o remount,ro /mnt
umount -l /mnt
grep /jffs /proc/mounts > /dev/null && {
mount -o remount,ro /jffs
umount -l /jffs
}
# spawn a new shell from ramdisk to reduce the probability of cache issues
exec /bin/busybox ash -c "$*"
}
run_hooks() {
local arg="$1"; shift
for func in "$@"; do
eval "$func $arg"
done
}
ask_bool() {
local default="$1"; shift;
local answer="$default"
[ "$INTERACTIVE" -eq 1 ] && {
case "$default" in
0) echo -n "$* (y/N): ";;
*) echo -n "$* (Y/n): ";;
esac
read answer
case "$answer" in
y*) answer=1;;
n*) answer=0;;
*) answer="$default";;
esac
}
[ "$answer" -gt 0 ]
}
v() {
[ "$VERBOSE" -ge 1 ] && echo "$@"
}
rootfs_type() {
mount | awk '($3 ~ /^\/$/) && ($5 !~ /rootfs/) { print $5 }'
}
get_image() {
local from="$1"
case "$from" in
http://*|ftp://*) wget -O- -q "$from";;
*) cat "$from"
esac
}
get_magic_word() {
get_image "$1" | dd bs=2 count=1 2>/dev/null | hexdump | awk '$2 { print $2 }'
}
refresh_mtd_partitions() {
mtd refresh rootfs
}
jffs2_copy_config() {
if grep rootfs_data /proc/mtd >/dev/null; then
# squashfs+jffs2
mtd -e rootfs_data jffs2write "$CONF_TAR" rootfs_data
else
# jffs2
mtd jffs2write "$CONF_TAR" rootfs
fi
}
do_upgrade() {
v "Performing system upgrade..."
platform_do_upgrade "$ARGV"
[ "$SAVE_CONFIG" -eq 1 ] && {
v "Refreshing partitions"
if type 'platform_refresh_partitions' >/dev/null 2>/dev/null; then
platform_refresh_partitions
else
refresh_mtd_partitions
fi
if type 'platform_copy_config' >/dev/null 2>/dev/null; then
platform_copy_config
else
jffs2_copy_config
fi
}
ask_bool 1 "Reboot" && reboot
}

View file

@ -0,0 +1,92 @@
#!/bin/sh
. /etc/functions.sh
# initialize defaults
RAMFS_COPY_BIN="" # extra programs for temporary ramfs root
RAMFS_COPY_DATA="" # extra data files
export INTERACTIVE=0
export VERBOSE=1
export SAVE_CONFIG=1
# parse options
while [ -n "$1" ]; do
case "$1" in
-i) export INTERACTIVE=1;;
-v) export VERBOSE="$(($VERBOSE + 1))";;
-q) export VERBOSE="$(($VERBOSE - 1))";;
-*)
echo "Invalid option: $1"
exit 1
;;
*) break;;
esac
shift;
done
export CONFFILES=/tmp/sysupgrade.conffiles
export CONF_TAR=/tmp/sysupgrade.tgz
export ARGV="$*"
export ARGC="$#"
[ -z "$ARGV" ] && {
cat <<EOF
Usage: $0 [options] <image file or URL>
Options:
-i interactive mode
-v more verbose
-q less verbose
EOF
exit 1
}
add_uci_conffiles() {
local file="$1"
find /etc/config > "$file"
return 0
}
# hooks
sysupgrade_image_check="platform_check_image"
sysupgrade_init_conffiles="add_uci_conffiles"
include /lib/upgrade
do_save_conffiles() {
[ -z "$(rootfs_type)" ] && {
echo "Cannot save config while running from ramdisk."
ask_bool 0 "Abort" && exit
return 0
}
run_hooks "$CONFFILES" $sysupgrade_init_conffiles
ask_bool 0 "Edit config file list" && vi "$CONFFILES"
v "Saving config files..."
[ "$VERBOSE" -gt 1 ] && TAR_V="v" || TAR_V=""
tar c${TAR_V}zf "$CONF_TAR" -T "$CONFFILES" 2>/dev/null
}
type platform_check_image >/dev/null 2>/dev/null || {
echo "Firmware upgrade is not implemented for this platform."
exit 1
}
for check in $sysupgrade_image_check; do
( eval "$check \"\$ARGV\"" ) || {
echo "Image check '$check' failed."
exit 1
}
done
if ask_bool $SAVE_CONFIG "Keep config files over reflash"; then
do_save_conffiles
export SAVE_CONFIG=1
else
export SAVE_CONFIG=0
fi
run_hooks "" $sysupgrade_pre_upgrade
v "Switching to ramdisk..."
run_ramfs '. /etc/functions.sh; include /lib/upgrade; do_upgrade'

View file

@ -147,7 +147,7 @@ static void add_file(char *name, int parent)
else
fname = name;
inode = add_dirent(name, IFTODT(S_IFREG), parent);
inode = add_dirent(fname, IFTODT(S_IFREG), parent);
memset(&ri, 0, sizeof(ri));
ri.magic = JFFS2_MAGIC_BITMASK;
ri.nodetype = JFFS2_NODETYPE_INODE;
@ -223,6 +223,9 @@ int mtd_write_jffs2(char *mtd, char *filename, char *dir)
goto done;
}
if (!*dir)
target_ino = 1;
/* parse the structure of the jffs2 first
* locate the directory that the file is going to be placed in */
for(;;) {
@ -253,7 +256,7 @@ int mtd_write_jffs2(char *mtd, char *filename, char *dir)
struct jffs2_raw_dirent *de = (struct jffs2_raw_dirent *) node;
/* is this the right directory name and is it a subdirectory of / */
if ((de->pino == 1) && !strncmp(de->name, dir, de->nsize))
if (*dir && (de->pino == 1) && !strncmp(de->name, dir, de->nsize))
target_ino = de->ino;
/* store the last inode and version numbers for adding extra files */

View file

@ -52,7 +52,7 @@
#define DEBUG
#define JFFS2_DEFAULT_DIR "tmp"
#define JFFS2_DEFAULT_DIR "" /* directory name without /, empty means root dir */
#define SYSTYPE_UNKNOWN 0
#define SYSTYPE_BROADCOM 1

View file

@ -0,0 +1,27 @@
platform_check_image() {
[ "$ARGC" -gt 1 ] && return 1
case "$(get_magic_word "$1")" in
48eb) return 0;;
*)
echo "Invalid image type"
return 1
;;
esac
}
platform_do_upgrade() {
get_image "$1" > /dev/hda
sync
}
x86_prepare_ext2() {
# if we're running from ext2, we need to make sure that we have a mtd
# partition that points to the active rootfs partition.
# however this only matters if we actually need to preserve the config files
[ "$SAVE_CONFIG" -eq 1 ] && return 0
grep rootfs /proc/mtd >/dev/null || {
echo /dev/hda2,65536,rootfs > /sys/module/block2mtd/parameters/block2mtd
}
}
append sysupgrade_pre_upgrade x86_prepare_ext2