mount_vacant_space

sa-kt

Feb 13th, 2025 (edited)

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#!/bin/sh /etc/rc.common
# Unlock MTD partitions at startup
START=10
# 20250213版
# スクリプト名を取得
SCRIPT_NAME=$(basename "$0")
# モデル名を取得
MODEL=$(ubus call system board | jsonfilter -e '@.model')
# モデルに応じた MTD_NUM と UBI_VOLUME の設定
case "$MODEL" in
"Buffalo WSR-3200AX4S")
MTD_NUM=11
UBI_VOLUME="dpi"
;;
"ELECOM WRC-X3200GST3")
MTD_NUM=10
UBI_VOLUME="dpi"
;;
*)
echo "$SCRIPT_NAME: Unsupported model: $MODEL" > /dev/kmsg
exit 1
;;
esac
# 成功した場合のログ出力
echo "$SCRIPT_NAME: Model detected: $MODEL, MTD_NUM=$MTD_NUM, UBI_VOLUME=$UBI_VOLUME" > /dev/kmsg
# 変数定義
MTD_DEV="/dev/mtd$MTD_NUM"
MOUNT_POINT="/mnt/vacant_space"
boot() {
echo "$SCRIPT_NAME: Unlocking MTD partitions..." > /dev/kmsg
# 1. insmod mtd-rw
if insmod mtd-rw i_want_a_brick=1; then
echo "$SCRIPT_NAME: insmod mtd-rw successful" > /dev/kmsg
else
echo "$SCRIPT_NAME: insmod mtd-rw failed" > /dev/kmsg
fi
# 2. mtd unlock
if mtd unlock "$MTD_DEV"; then
echo "$SCRIPT_NAME: mtd unlock $MTD_DEV successful" > /dev/kmsg
else
echo "$SCRIPT_NAME: mtd unlock $MTD_DEV failed" > /dev/kmsg
fi
# 3. ubiattach
if ubiattach -m "$MTD_NUM"; then
echo "$SCRIPT_NAME: ubiattach -m $MTD_NUM successful" > /dev/kmsg
else
echo "$SCRIPT_NAME: ubiattach -m $MTD_NUM failed" > /dev/kmsg
fi
# 'UBI_VOLUME' ボリュームを含む UBI デバイスの特定
ubi_dev=""
for dev in /dev/ubi[0-9]*; do
if ubinfo "$dev" -a | grep -q "Name: *$UBI_VOLUME"; then
ubi_dev="${dev#/dev/}"
break
fi
done
if [ -z "$ubi_dev" ]; then
echo "$SCRIPT_NAME: Failed to detect UBI device containing '$UBI_VOLUME' volume" > /dev/kmsg
ubi_dev="ubi1" # デフォルトで ubi1 を使用
else
echo "$SCRIPT_NAME: Detected UBI device: $ubi_dev" > /dev/kmsg
fi
# マウント処理
mkdir -p "$MOUNT_POINT"
if mount -t ubifs "$ubi_dev:$UBI_VOLUME" "$MOUNT_POINT"; then
echo "$SCRIPT_NAME: Mount succeeded: '$UBI_VOLUME' volume mounted on $MOUNT_POINT" > /dev/kmsg
# 容量を多く消費する /usr/sbin を空き地へ置き換える。bind でマウント
if [ ! -d "$MOUNT_POINT/usr_sbin" ]; then
mkdir -p "$MOUNT_POINT/usr_sbin"
cp -a /usr/sbin/* "$MOUNT_POINT/usr_sbin"
fi
mount --bind "$MOUNT_POINT/usr_sbin" /usr/sbin
else
echo "$SCRIPT_NAME: Mount failed: Unable to mount '$UBI_VOLUME' volume on $MOUNT_POINT" > /dev/kmsg
exit
fi
}

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