RedPill

由 datahunter 在一, 20/09/2021 - 15:17 發表

最後更新: 2023-09-05

介紹

redpill 項目有3個子項目, 分別係

redpill.ko # 負責扮 Synology 的硬件
redpill-load # patch script, 並建立 bootable 的 raw image
dsm-research # 技術文件

原理

redpill-load 包含 build-loader.sh 在做什麼

下載 DSM 的 pat 到 Cache Folder (ds3615xs_25556.pat)
Verified checksum of a known zlinux& ramdisk files
(config/DS3615xs/6.2.4-25556/config.json)
Unpack pat 到 build 目錄
Patches the kernel zlinux using included patches [direct mode]
(zImage-001-3615xs-25556-ramdisk-and-header.bsp)
Unpacks ramdisk
- Applies common patches (disable root pw, add RP LKM loading etc)
- Generates synoinfo replacements based on the platform requirements AND user configuration
- Patches synoinfo in etc & etc.defaults in the ramdisk image
- Adds dynamic patching routines to post-init script (so that synoinfo is patched in the booted OS too)
- Copies missing VirtIO modules (original DSM script supports them but they're not included in non-VDSM builds)
Reassembles ramdisk(rd.gz)
在當前目錄建立 raw image 檔

Patching the kernel mothod:

direct (Default)
repack (BRP_LINUX_PATCH_METHOD=repack)

* In the repack mode the kernel is NOT patched using direct binary patches between original and final.

* Each version requires a static kernel patch.

Info.

DSM 6.2.4 = Kernel v3 <= 要用 GCC v4.8/v4.9 去 compile, 否認會失敗 !

Compile RedPill-LKM - redpill.ko

下載 DSM 6.2.4 的 Linux Kernel Source

HW: ds3515xs => bromolow
DSM Version 6.2.4 => 25426
Linux Kernel => 3.10.x

# linux kernel source

https://archive.synology.com/download/ToolChain/Synology%20NAS%20GPL%20Source

Complie redpill on Centos 7

# 準備

yum groupinstall "Development Tools" # gcc version 4.8.5

# 準備 package source

tar -Jxf linux-3.10.x.txz

cd linux-3.10.x

cp synoconfigs/bromolow .config

make oldconfig ; make modules_prepare

# redpill-lkm

cd /usr/src

git clone https://github.com/RedPill-TTG/redpill-lkm

cd redpill-lkm; git pull

Already up-to-date.

# 查看支援

grep ^prod-v Makefile

prod-v6: # kernel running in v6.2+ OS, fully stripped with no debug messages
prod-v7: # kernel running in v6.2+ OS, fully stripped with no debug messages

make LINUX_SRC=../linux-3.10.x prod-v6 # 另有 dev-v6, test-v6

# Checking

ls -lh redpill.ko

-rw-r--r-- 1 root root 108K Sep 23 04:35 redpill.ko

建立 Bootable Image

準備

yum install jq # v1.6 epel

在 Centos 7 compile 它們

Compile bash 5.X # 系統上的 bash 太舊, 行 build-loader.sh 會出 error
compile bsdiff # 系統沒有它, 亦要人手 compile

# Get Source Code

# pocopico 版本才支援 DSM 7.1

git clone https://github.com/pocopico/redpill-load

cd redpill-load; git pull

# Config

建立 user_config.json

{
  "extra_cmdline": {
    "sn": "<fill me>",
    "mac1": "005056888801",
    "mac2": "005056888802"
  }
}

# ESXi 的 MAC Address "00:50:56:x:x:x" 是不可以人手指定

其他 Setting

ie.

ls -1 config/DS3615xs/*/config.json

config/DS3615xs/6.2.4-25556/config.json
config/DS3615xs/7.0.1-42218/config.json
config/DS3615xs/7.0-41222/config.json
config/DS3615xs/7.1.0-42621/config.json
config/DS3615xs/7.1.0-42661/config.json

# Copy Kernel module(redpill.ko) 到 rp-lkm

# Path: ext/rp-lkm/redpill-linux-<VERSION>.ko

grep -A 3 ramdisk_copy config/DS3615xs/7.0.1-42218/config.json

    "ramdisk_copy": {
      "@@@EXT@@@/rp-lkm/redpill-linux-v3.10.108.ko": "usr/lib/modules/rp.ko",
      "@@@COMMON@@@/iosched-trampoline.sh": "usr/sbin/modprobe"
    },

cp ../redpill-lkm/redpill.ko ext/rp-lkm/redpill-linux-v3.10.108.ko

# 下載 pat 到 cache folder

# 注意要改名 !!

cd cache

下載 DSM_DS3615xs_42218.pat

mv DSM_DS3615xs_42218.pat ds3615xs_42218.pat

# Build

Run ./build-loader.sh <hw_version> <os_version> [output-file]

e.g.

export PATH=/opt/bash/bin:$PATH # 設定要 bash 5.0

./build-loader.sh DS3615xs 7.0.1-42218 redpill.img

ls -lh ./redpill.img

-rw-r--r-- 1 root root 128M Dec 15 17:59 ./redpill.img

# 修改 loader

losetup -f

losetup /dev/loop0 redpill.img

partprobe /dev/loop0

ls -1 /dev/loop0*

/dev/loop0
/dev/loop0p1    # vfat
/dev/loop0p2    # ext2
/dev/loop0p3    # Empty

mkdir /mnt/p1 /mnt/p2

mount /dev/loop0p1 /mnt/p1

vim /mnt/p1/boot/grub/grub.cfg

...
# 直接用 SATA boot
#set default="0"
set default="1"
#set timeout="1"
set timeout="1"
...
menuentry 'RedPill DS3615xs v6.2.4-25556 (SATA, Verbose)' {
        savedefault
        set root=(hd0,msdos1)
        echo Loading Linux...
        linux /zImage ... SataPortMap=16 DiskIdxMap=1000

cd -; umount /mnt/p1; losetup -d loop0

loop0p1 Partition

grub(grub-0.97),
rd.gz(patched ramdisk),
zImage(patched zImage),
GRUB_VER(orig pat),
custom.gz (rp.ko, boot-wait.sh, virtio)

loop0p2 Partition

rd.gz(orig pat), zImage(orig pat), grub_cksum.syno

cat grub_cksum.syno

/zImage Encrypted: 34299503
/rd.gz Encrypted: df5b31a3

Run it on ESXi 7

yum install qemu-img # On Centos 7

qemu-img convert -O vmdk redpill.img boot.tmp

file boot.tmp

boot.tmp: VMware4 disk image

# boot.vmdk boot-flat.vmdk

vmkfstools -i boot.tmp -d thin boot.vmdk # Run vmkfstools on ESXi

在 DiskStation mount synoboot1 fail

mkdir /mnt/p1 /mnt/p2

mount -t vfat /dev/synoboot1 /mnt/p1

mount: mounting /dev/synoboot1 on /mnt/p1 failed: Invalid argument

[Fix]

cd /dev

mount -t vfat synoboot1 /mnt/p1

mount -t ext2 synoboot2 /mnt/p2

boot-wait.sh

boot msg

Running "boot-wait.sh" for thethorgroup.boot-wait->on_boot
[    3.958069] usb 1-1: new full-speed USB device number 2 using uhci_hcd
Still waiting for boot device (waited 1 of 30 seconds)
Still waiting for boot device (waited 2 of 30 seconds)
Still waiting for boot device (waited 3 of 30 seconds)
...

Troubleshoot

找到 HDD 但 Install fail

# 6.2.4 HDD 要有 5G 先安裝成功,

tail -f /var/log/messages

... raidtool: partition_create.c:178 Failed to [/sbin/sfdisk -N2 -uS -q -f -j0 -z4194304 -tfd -F /dev/sdg], err=255
... raidtool: raidtool.c:665 Failed to create system partition of /dev/sdg, newlayout=8, errno=0x2000
... raidtool: raidtool.c:709 No disk to create system and swap partition, initsys fail!

* 用 virtio 安裝會找不到 HDD, 因為 sda -> vda

安 DSM 時出 Error

Failed to install the file. The file is probably corrupted. (13)

在 bootloader 選 'RedPill DS3615xs v6.2.4-25556 (SATA, Verbose)'

Solution to fix update fail from 6.2.4 to 6.2.4-2

cat /var/log/junior_reason

Exit on error [7] root not matched with junior...

cat /var/log/messages

... findhostd: ninstaller.c:224 Mount partion /dev/md0 /tmpRoot
... findhostd: ninstaller.c:967 Executing /tmpRoot//.syno/patch/updater -a /tmpRoot [255]
... findhostd: ninstaller.c:969 Recover patch is not available.

1. login the console with root (without password)

2. mount /dev/md0 /mnt

3. rm -rf /mnt/.syno

4. http://NAS-IP:5000

Select "Migration: Keep my data and most of the settings"

Install original pat (DSM_DS3615xs_25556.pat) # 271 MB

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