大A小B的Recovery的OTA升级

一 开发板介绍

开发板介绍：

开发板硬件介绍 ，开发板硬件介绍

二 Recovery 升级方式原理和介质介绍

1 Recovery 升级简介和实现方法

​ 对于君正的Recovery升级方式，是指开发版存在两套系统，一套为正常使用的系统，称为主系统（main_os），另一套为用于升级主系统的小系统（Recovery系统），在保证网络等基础功能的前提下，可以针对性的对其进行精简。

​ 我们提供在main_os升级recovery系统以及在recovery系统中升级main_os的脚本。

​ 基本步骤如下：

1. 将需要更新的recovery升级固件与主系统main_os升级固件放到服务器上。
2. 在main_os中，通过网络检查main_os升级可用性，检查并升级recovery系统。
3. 重启以进入recovery系统，执行脚本，从网络中获取并升级main_os。

​ 注意：在recovery系统中执行main_os升级脚本时，如果main_os升级失败，不会自动切换回原系统（防止main_os在已经被修改的情况下进入main_os，而“变砖”），使用者请自行选择升级失败后的策略。

2 升级存储介质

​ 君正目前支持升级的存储介质包含两种：mtd 和 mmc两种。其中mtd包含：nand 和 nor。

三 ota 编译配置

采用recovery方式进行ota升级，需要两套系统，建议打开两个项目，一个用于制作 main_os，一个用于制作recovery系统。本次验证中制作main_os与recovery系统升级包的项目名分别为main_os_img_maker与recovery_img_maker。

在本次验证中，我们会将原本版本为3的主系统，未进行烧录的recovery系统，将主系统与recovery系统都升级到版本4

1 uboot 添加支持 ota 功能

​ 以Darwin_X2000_V2.0开发板编译配置为例，编译出的uboot固件需要支持ota功能（main_os与recovery系统均需要进行配置）：

首先需要确定你当前的编译配置使用的是那个uboot的编译配置文件，通过如下方法可以确定。使用工具 tools/iconfigtool/IConfigToolApp$ ./IConfigTool

选择Config.in文件：build/Config.in

选择Config文件： build/configs/x2000_darwin_v20_nand_defconfig

如上图，根据uboot相对路径和默认配置，可以确定uboot编译的配置文件为 bootloader/uboot-x2000/boards.cfg 的 x2000_base_xImage_sfc_nand,在文件 boards.cfg中搜索x2000_base_xImage_sfc_nand。看是否含有SPL_OS_OTA_BOOT的标志。有这个标志表示uboot支持ota的功能，没有就手动加上这个标志

//或选择使用预先写好的uboot默认配置x2000_base_ota_xImage_sfc_nand

x2000_base_xImage_sfc_nand   mips        xburst2    x2000_base   ingenic    x2000_v12   x2000_base:SPL_SFC_NAND,MTD_SFCNAND,SPL_OS_BOOT,SPL_OS_OTA_BOOT,RMEM_MB=16,SPL_PARAMS_FIXER

2 buildroot ota编译配置注意事项

​ 君正ota采用的是只读系统，所以便于用户开发需要可读可写的分区，我们设置了一个data分区（在IConfigTool中启动的自动挂载脚本），该分区是可读可写分区。这样可以便于用户存放可读可写的文件。

​ 在data分区中，会创建一个隐藏文件夹(.recovery)用来保存recovery系统的版本，如开发者不对data分区自动挂载，请自行更改recovery版本信息存放位置（device_tools/recovery_version_utils.sh中的recovery_version_dir），否则每次升级因无法检测到当前recovery版本，每次都会执行recovery系统的升级。

如需要ubifs格式的文件系统，需要buildroot支持可以打包该格式的文件系统配置。

方法如下,进入buildroot 执行:

/buildroot/buildroot$ make menuconfig 在Filesystem images目录下按照下图选择相应的配置即可。

备注：buildroot的配置修改以后，需要执行拷贝到其主配置上去。比如该buildroot的配置为：build/configs/buildroot/buildroot_wifi_common_defconfig（对应IConfigTool中工程/编译配置-buildroot配置文件）

所以上面修改了配置以后，执行如下操作：

buildroot/buildroot$ cp .config ../../build/configs/buildroot/buildroot_wifi_common_defconfig

这样你再整体编译的时候，buildroot的修改才会生效（当使用make x2000_darwin_v20_nand_defconfig进行整体配置编译后，会覆盖buildroot_wifi_common_defconfig配置，此时也需重新将配置拷贝到主配置中）。

四 制作 main_os 与 recovery系统 升级固件

​ 以Darwin_X2000_V2.0开发板编译配置为例制作OTA升级固件。使用ota升级为联网升级，WIFI_BT设置

编译 main_os 升级包固件

1 ota相关配置

使用工具 tools/iconfigtool/IConfigToolApp$ ./IConfigTool ,选择配置文件： build/configs/x2000_darwin_factory_defconfig

配置如下：

从上往下，每项宏的配置对应的功能如下所示：

1：Storage medium(存储介质)(APP_ota_updater_storage_medium):
//板子的存储介质，包含两种类型，nand和mmc，可以根据自己的设备存储介质选择不同的类型

2：当前系统的ota版本号(每次编译新的ota版本时都应该递增此值)(APP_ota_updater_version)，对于recovery系统，也表示recovery系统的版本号
//当前ota的版本号，会写入文件系统的 /etc/ota_info 'ota_version=N'
该版本号是指打包升级包的版本号，如果你需要制作版本号为4,该处 N 需要修改为4

3：ota 升级服务器的地址(App_ota_updater_site)
//ota的服务器地址路径，会写入文件系统的 /etc/ota_info 'ota_site=...'

4：ota 分包大小(App_ota_updater_block_size)
//ota分包大小，制作ota镜像时会将ota镜像按此大小分包

5：ota kernel 镜像路径(App_ota_updater_kernel_img_path)
//ota kernel镜像路径，制作ota镜像时需要

6：ota rootfs 镜像路径(App_ota_updater_rootfs_img_path)
//ota rootfs镜像路径，制作ota镜像时需要

2 编译 ota 升级包固件

编译 main_os 升级包固件

先使用配置 build/configs/x2000_darwin_v20_nand_defconfig 进行整体编译以后，然后进入build，执行如下指令：

build$ make ota_img
#注意： 在编译ota_img 之前必须得先保证编译好buildroot镜像文件与kernel镜像文件

在 "工程/build"目录下编译ota升级镜像，会在 "工程/build/output/ota" 目录下生成ota镜像文件：

cd output/ota/
ls

#保存 rootfs.squashfs.000*的md5sum 用于下载后设备校验
ota_md5_rootfs.squashfs.df4cc0f4e8d7c11b16b94e4fd200326e

#保存xImage.000*的md5sum 用于下载后设备校验
ota_md5_xImage.f814dfceac0e6633997f71c5313a5ce7

#镜像文件拆分的配置
ota_update.in

#"rootfs.squashfs.*"表示被拆分后的buildroot镜像文件
rootfs.squashfs.0000.df4cc0f4e8d7c11b16b94e4fd200326e
rootfs.squashfs.0001.c8827dca1a81c64e3a509be9a1358904
rootfs.squashfs.0002.805d3c6077de673126261d62072228be
rootfs.squashfs.0003.cf99cc192d32fe70054b5268b8c4d938
rootfs.squashfs.0004.b8da977feecdbbf82c848292192aaa52
rootfs.squashfs.0005.ca2f66743db7b8336088053967ef4da6
rootfs.squashfs.0006.dc8f97cafa7c65e350203cbfe0bd1fb2
rootfs.squashfs.0007.cd6c75f069e3d78d410bb763f3c68526
rootfs.squashfs.0008.90837e629ab09521c41ef581b9610bcb
rootfs.squashfs.0009.17236e1e8878f18243a444768df406ee
rootfs.squashfs.0010.76d58741eaae6f18ca793a33332ef7a3
rootfs.squashfs.0011.466378a54132911f490444a9e343bf73
rootfs.squashfs.0012.6599a1421f2b67d10ba5927b0eb88b68

#"xImage.*"表示被拆分后的kernel镜像文件
xImage.0000.f814dfceac0e6633997f71c5313a5ce7
xImage.0001.7be8bb40970d23ade3362fe57ffcda37
xImage.0002.ae5a5c19c199954fe1c0840f8e1cfb3c
xImage.0003.8a31a411504341992009ce96ee67f237

其中 ota_update.in文件

build$ cat output/ota/ota_update.in

ota_version=4

img_type=kernel
img_name=xImage
img_size=3772480
img_md5=f814dfceac0e6633997f71c5313a5ce7

img_type=rootfs
img_name=rootfs.squashfs
img_size=12861440
img_md5=df4cc0f4e8d7c11b16b94e4fd200326e

#关键字 ota_version:做版本检查，避免忙中出错和实际版本不一致
#关键字 img_type:定义升级的内容类型：kernel rootfs
#关键字 img_name:升级的文件名，在升级包目录的文件名前缀
#关键字img_size:升级文件的总大小，因为升级文件会被拆分成多个文件，默认按1Mbyte拆分
#关键字img_md5:升级文件的md5sum值

编译 recovery 升级包固件

recovery 升级包固件的编译方式与 main_os 的编译方式相同，请参照之前的编译过程进行编译，本次测试将

五 OTA 烧录工具配置

存储介质为NAND 的烧录工具配置

以Darwin_X2000_V2.0开发板 OTA 烧录为例，进行烧录工具的说明。配置如下：

//板级信息也可选x2000h_sfc_nand_ota_lpddr3_linux.cfg

对于以上的kernel与rootfs，烧录为main_os所编译出来的固件，对于kernel2与rootfs2可以烧录为recovery所编译出来的固件（这时，需要在之前提到的data分区中写入./recovery/recovery_version文件，以及recovery_version=? ?为recovery的版本，对应ota版本号）

或不进行kernel2与rootfs2的烧录，通过网络服务器下载recovery固件，并写入到对应分区

填写label和选择ops后会自动补齐offset，均需要与sfc中的分区信息一致

ota 分区烧录的文件可以为一个空文件。

userdata为/usr/data下挂载的分区，根据需要设置大小与文件。

六 OTA 测试服务器搭建方法（仅供参考）

君正不提供服务器，客户需自己解决，以下服务器搭建仅供测试使用。ota的升级文件在设备端，能被wget命令获取即可。

1 安装 apache2 服务器，用于测试ota升级

​ 安装命令： sudo apt-get install apache2

2 启动 apache2 服务器

启动命令： service apache2 start

电脑端放置OTA升级固件的目录：/var/www/html/ 。

注：如果设备端无法访问apache2服务器，有可能是防火墙的问题。

可以关掉电脑端的防火墙再进行测试，命令如下：

暂时关闭防火墙： systemctl stop firewalld

七 OTA服务器文件部署

以Darwin_X2000_V2.0开发板为例，将版本升级至4，我的电脑的地址是10.4.3.5，所以地址：http://10.4.3.5/ota/board_x2000/用于存放ota相关的文件，对应于服务器本机的路径为：`/var/www/html/ota/board_x2000`，

该目录下的文件需要自己添加：

cd /var/www/html/ota/board_x2000/

tree -L 2
.
├── main_os
│   └── ota_v4
├── ota_config.in
└── recovery
    └── ota_v4

1 添加ota_config.in文件，该文件内容如下：

/*
关键字 current_version 用于定义当前最新的main_os的版本
当`current_version=4`时,对应于目录`ota_v4/`存放ota的main_os的升级信息和文件
关键字 recovery_version 用于定义当前最新的recovery的版本
当`recovery_version=4`时,对应于目录`ota_v4/`存放ota的recovery的升级信息和文件
*/
current_version=4
recovery_version=4

2 ota_v'N'/目录 （'N'是数字，这里添加ota_v4)，需要自己手动添加，并将编译好的main_os与recovery升级镜像文件复制到该文件夹

 cp main_os_img_maker/build/output/ota/* /var/www/html/ota/board_x2000/main_os/ota_v4/ -arf    #复制main_os镜像文件到服务器
 cp recovery_img_maker/build/output/ota/* /var/www/html/ota/board_x2000/recovery/ota_v4/ -arf   #复制recovery镜像文件到服务器

3 手动创建 ota_v4.ok 到 /var/www/html/ota/board_x2000/main_os/ota_v4/ 与 /var/www/html/ota/board_x2000/recovery/ota_v4/ 这两个文件夹下，最终确定 main_os与recovery 的 ota_v4版本发布

ota_v4.ok (4是版本号 ota_v'N'.ok 该文件的内容为空即可)
此文件是做 ota 的最后一步确认，制作 ota镜像的时候不会有这个文件产生，这个文件需要客户自己手动创建生成，以确定此版本的ota验证是成功可行的，可以提供给外部的设备端进行下载更新。设备端如果检测到此文件才会启动ota升级流程

所以/var/www/html/ota/board_x2000文件夹，服务器上的目录与内容如下：

lih@lih:/var/www/html/ota/board_x2000/$ tree
.
├── main_os
│   └── ota_v4
│       ├── ota_md5_rootfs.squashfs.df4cc0f4e8d7c11b16b94e4fd200326e
│       ├── ota_md5_xImage.f814dfceac0e6633997f71c5313a5ce7
│       ├── ota_update.in
│       ├── ota_v4.ok
│       ├── rootfs.squashfs.0000.df4cc0f4e8d7c11b16b94e4fd200326e
│       ├── rootfs.squashfs.0001.c8827dca1a81c64e3a509be9a1358904
│       ├── rootfs.squashfs.0002.805d3c6077de673126261d62072228be
│       ├── rootfs.squashfs.0003.cf99cc192d32fe70054b5268b8c4d938
│       ├── rootfs.squashfs.0004.b8da977feecdbbf82c848292192aaa52
│       ├── rootfs.squashfs.0005.ca2f66743db7b8336088053967ef4da6
│       ├── rootfs.squashfs.0006.dc8f97cafa7c65e350203cbfe0bd1fb2
│       ├── rootfs.squashfs.0007.cd6c75f069e3d78d410bb763f3c68526
│       ├── rootfs.squashfs.0008.90837e629ab09521c41ef581b9610bcb
│       ├── rootfs.squashfs.0009.17236e1e8878f18243a444768df406ee
│       ├── rootfs.squashfs.0010.76d58741eaae6f18ca793a33332ef7a3
│       ├── rootfs.squashfs.0011.466378a54132911f490444a9e343bf73
│       ├── rootfs.squashfs.0012.6599a1421f2b67d10ba5927b0eb88b68
│       ├── xImage.0000.f814dfceac0e6633997f71c5313a5ce7
│       ├── xImage.0001.7be8bb40970d23ade3362fe57ffcda37
│       ├── xImage.0002.ae5a5c19c199954fe1c0840f8e1cfb3c
│       └── xImage.0003.8a31a411504341992009ce96ee67f237
├── ota_config.in
└── recovery
    └── ota_v4
        ├── ota_md5_rootfs.squashfs.df4cc0f4e8d7c11b16b94e4fd200326e
        ├── ota_md5_xImage.f814dfceac0e6633997f71c5313a5ce7
        ├── ota_update.in
        ├── ota_v4.ok
        ├── rootfs.squashfs.0000.df4cc0f4e8d7c11b16b94e4fd200326e
        ├── rootfs.squashfs.0001.c8827dca1a81c64e3a509be9a1358904
        ├── rootfs.squashfs.0002.805d3c6077de673126261d62072228be
        ├── rootfs.squashfs.0003.cf99cc192d32fe70054b5268b8c4d938
        ├── rootfs.squashfs.0004.b8da977feecdbbf82c848292192aaa52
        ├── rootfs.squashfs.0005.ca2f66743db7b8336088053967ef4da6
        ├── rootfs.squashfs.0006.dc8f97cafa7c65e350203cbfe0bd1fb2
        ├── rootfs.squashfs.0007.cd6c75f069e3d78d410bb763f3c68526
        ├── rootfs.squashfs.0008.90837e629ab09521c41ef581b9610bcb
        ├── rootfs.squashfs.0009.17236e1e8878f18243a444768df406ee
        ├── rootfs.squashfs.0010.76d58741eaae6f18ca793a33332ef7a3
        ├── rootfs.squashfs.0011.466378a54132911f490444a9e343bf73
        ├── rootfs.squashfs.0012.6599a1421f2b67d10ba5927b0eb88b68
        ├── xImage.0000.f814dfceac0e6633997f71c5313a5ce7
        ├── xImage.0001.7be8bb40970d23ade3362fe57ffcda37
        ├── xImage.0002.ae5a5c19c199954fe1c0840f8e1cfb3c
        └── xImage.0003.8a31a411504341992009ce96ee67f237

ota_v4/ota_update.in 里面放的是版本号为4的升级包，其中ota_version=4，该值跟第四章第1条那里的设置相对应。

八 OTA 升级的流程

1 ota 升级脚本

调用ota升级脚本，ota的升级脚本在 /etc/ota_bin/ 目录下，ota的配置在文件 /etc/ota_info 中，ota_info的内容如下：

# cat /etc/ota_info 

ota_version=4
ota_site=http://10.4.229.4/ota/board_x2000

ota_info 配置文件是由前面 "make ota_img" 的命令所生成的：

ota的升级脚本文件：

# ls /etc/ota_bin/ -l
total 84
-rwxrwxr-x    1 root     root         14119 Apr 14  2023 local_ota_update.sh
-rwxrwxr-x    1 root     root          8323 Apr 14  2023 main_os_info_check.sh
-rwxrwxr-x    1 root     root         14076 Apr 14  2023 network_main_os_update_recovery.sh
-rwxrwxr-x    1 root     root         14134 Apr 14  2023 network_ota_update.sh
-rwxrwxr-x    1 root     root         14309 Apr 14  2023 network_recovery_update_main_os.sh
-rwxrwxr-x    1 root     root          2596 Apr 14  2023 ota_img_data_provider.sh
-rw-rw-r--    1 root     root          4319 Apr 14  2023 ota_local_method.sh
-rwxrwxr-x    1 root     root          1077 Apr 14  2023 ota_update_kernel.sh
-rwxrwxr-x    1 root     root          1077 Apr 14  2023 ota_update_rootfs_squashfs.sh
-rwxrwxr-x    1 root     root          1053 Apr 14  2023 ota_update_rtos_bin.sh
-rw-rw-r--    1 root     root          5798 Apr 14  2023 ota_utils.sh
-rw-rw-r--    1 root     root           727 Apr 14  2023 recovery_version_utils.sh

执行sh /etc/ota_bin/network_main_os_update_recovery.sh

# sh network_main_os_update_recovery.sh 

try to get http://10.4.3.5/ota/board_x2000/ota_config.in
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/ota_v4.ok
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/ota_update.in
ota_kernel 1
ota_kernel_name xImage
ota_kernel_size 3805248
ota_kernel_md5 dc8f40dcd41d962d18ad3393231d563d
ota_rootfs 1
ota_rootfs_name rootfs.squashfs
ota_rootfs_size 41529344
ota_rootfs_md5 afa0f6c142d617dccbebd118a9dd8f88
ota_rtos 0
ota_rtos_name
ota_rtos_size
ota_rtos_md5
ECC failed: 0
ECC corrected: 0
Number of bad blocks: 0
Number of bbt blocks: 0
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x00000000 and ending at 0x00000100...
ECC failed: 0
ECC corrected: 0
Number of bad blocks: 0
Number of bbt blocks: 0
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x00000000 and ending at 0x00000100...
device check ok
ready to update main os
try to get http://10.4.3.5/ota/board_x2000/ota_config.in
cat: can't open '/usr/data/.recovery/recovery_version': No such file or directory
sh: bad number
try to get http://10.4.3.5/ota/board_x2000/recovery/ota_v4/ota_v4.ok
try to get http://10.4.3.5/ota/board_x2000/recovery/ota_v4/ota_update.in
ota_kernel 1
ota_kernel_name xImage
ota_kernel_size 3805248
ota_kernel_md5 781eff9f096163ed13d064907a646760
ota_rootfs 1
ota_rootfs_name rootfs.squashfs
ota_rootfs_size 13254656
ota_rootfs_md5 7db3070593d7e53f2b5f94cd2e413a0f
ota_rtos 0
ota_rtos_name
ota_rtos_size
ota_rtos_md5
ECC failed: 0
ECC corrected: 0
Number of bad blocks: 0
Number of bbt blocks: 0
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x00000000 and ending at 0x00000100...
ECC failed: 0
ECC corrected: 0
Number of bad blocks: 0
Number of bbt blocks: 0
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x00000000 and ending at 0x00000100...
we are going to update recovery
ota: started
start update kernel
try to get http://10.4.3.5/ota/board_x2000/recovery/ota_v4/ota_md5_xImage.781eff9f096163ed13d064907a646760
Erasing 128 Kibyte @ e0000 -- 17 % complete try to get http://10.4.3.5/ota/board_x2000/recovery/ota_v4/xImage.0000.781eff9f096163ed13d064907a646760
Erasing 128 Kibyte @ 4e0000 -- 100 % complete 
Writing data to block 0 at offset 0x0
try to get http://10.4.3.5/ota/board_x2000/recovery/ota_v4/xImage.0001.b4a9fe9771c506a35cba0032609f3205
Writing data to block 1 at offset 0x20000
Writing data to block 2 at offset 0x40000
Writing data to block 3 at offset 0x60000
Writing data to block 4 at offset 0x80000
Writing data to block 5 at offset 0xa0000
Writing data to block 6 at offset 0xc0000
Writing data to block 7 at offset 0xe0000
Writing data to block 8 at offset 0x100000
ota: data processed: 6% 1048576 17059904
try to get http://10.4.3.5/ota/board_x2000/recovery/ota_v4/xImage.0002.850f7e273254abdab90f1544383977f2
Writing data to block 9 at offset 0x120000
Writing data to block 10 at offset 0x140000
Writing data to block 11 at offset 0x160000
Writing data to block 12 at offset 0x180000
Writing data to block 13 at offset 0x1a0000
Writing data to block 14 at offset 0x1c0000
Writing data to block 15 at offset 0x1e0000
Writing data to block 16 at offset 0x200000
ota: data processed: 12% 2097152 17059904
try to get http://10.4.3.5/ota/board_x2000/recovery/ota_v4/xImage.0003.206a2ff41c4876dd3a6171c47b49dceb
Writing data to block 17 at offset 0x220000
Writing data to block 18 at offset 0x240000
Writing data to block 19 at offset 0x260000
Writing data to block 20 at offset 0x280000
Writing data to block 21 at offset 0x2a0000
Writing data to block 22 at offset 0x2c0000
Writing data to block 23 at offset 0x2e0000
Writing data to block 24 at offset 0x300000
ota: data processed: 18% 3145728 17059904
Writing data to block 25 at offset 0x320000
Writing data to block 26 at offset 0x340000
Writing data to block 27 at offset 0x360000
Writing data to block 28 at offset 0x380000
xImage read ok, now quit
ota: data processed: 22% 3805248 17059904
kernel update done
start update rootfs
try to get http://10.4.3.5/ota/board_x2000/recovery/ota_v4/ota_md5_rootfs.squashfs.7db3070593d7e53f2b5f94cd2e413a0f
Writing data to block 29 at offset 0x3a0000
Erasing 128 Kibyte @ a0000 --  3 % complete try to get http://10.4.3.5/ota/board_x2000/recovery/ota_v4/rootfs.squashfs.0000.7db3070593d7e53f2b5f94cd2e413a0f
Erasing 128 Kibyte @ fe0000 -- 100 % complete 
Writing data to block 0 at offset 0x0
try to get http://10.4.3.5/ota/board_x2000/recovery/ota_v4/rootfs.squashfs.0001.9f870c44ee2ce7765894f7b86e77c6b7
Writing data to block 1 at offset 0x20000
Writing data to block 2 at offset 0x40000
Writing data to block 3 at offset 0x60000
Writing data to block 4 at offset 0x80000
Writing data to block 5 at offset 0xa0000
Writing data to block 6 at offset 0xc0000
Writing data to block 7 at offset 0xe0000
Writing data to block 8 at offset 0x100000
ota: data processed: 28% 1048576 17059904
try to get http://10.4.3.5/ota/board_x2000/recovery/ota_v4/rootfs.squashfs.0002.d780e3357f34d91cb5e349a000827399
Writing data to block 9 at offset 0x120000
Writing data to block 10 at offset 0x140000
Writing data to block 11 at offset 0x160000
Writing data to block 12 at offset 0x180000
Writing data to block 13 at offset 0x1a0000
Writing data to block 14 at offset 0x1c0000
Writing data to block 15 at offset 0x1e0000
Writing data to block 16 at offset 0x200000
ota: data processed: 34% 2097152 17059904
try to get http://10.4.3.5/ota/board_x2000/recovery/ota_v4/rootfs.squashfs.0003.ba77606dcdd01e596719d7e9d6276ab0
Writing data to block 17 at offset 0x220000
Writing data to block 18 at offset 0x240000
Writing data to block 19 at offset 0x260000
Writing data to block 20 at offset 0x280000
Writing data to block 21 at offset 0x2a0000
Writing data to block 22 at offset 0x2c0000
Writing data to block 23 at offset 0x2e0000
Writing data to block 24 at offset 0x300000
ota: data processed: 40% 3145728 17059904
try to get http://10.4.3.5/ota/board_x2000/recovery/ota_v4/rootfs.squashfs.0004.441cd9c43fbdaf6e2cb98eec542e023b
Writing data to block 25 at offset 0x320000
Writing data to block 26 at offset 0x340000
Writing data to block 27 at offset 0x360000
Writing data to block 28 at offset 0x380000
Writing data to block 29 at offset 0x3a0000
Writing data to block 30 at offset 0x3c0000
Writing data to block 31 at offset 0x3e0000
Writing data to block 32 at offset 0x400000
ota: data processed: 46% 4194304 17059904
try to get http://10.4.3.5/ota/board_x2000/recovery/ota_v4/rootfs.squashfs.0005.168414b117e526156a30ff0638bdbe6a
Writing data to block 33 at offset 0x420000
Writing data to block 34 at offset 0x440000
Writing data to block 35 at offset 0x460000
Writing data to block 36 at offset 0x480000
Writing data to block 37 at offset 0x4a0000
Writing data to block 38 at offset 0x4c0000
Writing data to block 39 at offset 0x4e0000
Writing data to block 40 at offset 0x500000
ota: data processed: 53% 5242880 17059904
try to get http://10.4.3.5/ota/board_x2000/recovery/ota_v4/rootfs.squashfs.0006.b2f96d32ac7909206c33cc461731479f
Writing data to block 41 at offset 0x520000
Writing data to block 42 at offset 0x540000
Writing data to block 43 at offset 0x560000
Writing data to block 44 at offset 0x580000
Writing data to block 45 at offset 0x5a0000
Writing data to block 46 at offset 0x5c0000
Writing data to block 47 at offset 0x5e0000
Writing data to block 48 at offset 0x600000
ota: data processed: 59% 6291456 17059904
try to get http://10.4.3.5/ota/board_x2000/recovery/ota_v4/rootfs.squashfs.0007.8eb510c37385fae9f8fc038849db8f56
Writing data to block 49 at offset 0x620000
Writing data to block 50 at offset 0x640000
Writing data to block 51 at offset 0x660000
Writing data to block 52 at offset 0x680000
Writing data to block 53 at offset 0x6a0000
Writing data to block 54 at offset 0x6c0000
Writing data to block 55 at offset 0x6e0000
Writing data to block 56 at offset 0x700000
ota: data processed: 65% 7340032 17059904
try to get http://10.4.3.5/ota/board_x2000/recovery/ota_v4/rootfs.squashfs.0008.cf1cd4c838e54088faeef613c71283e7
Writing data to block 57 at offset 0x720000
Writing data to block 58 at offset 0x740000
Writing data to block 59 at offset 0x760000
Writing data to block 60 at offset 0x780000
Writing data to block 61 at offset 0x7a0000
Writing data to block 62 at offset 0x7c0000
Writing data to block 63 at offset 0x7e0000
Writing data to block 64 at offset 0x800000
ota: data processed: 71% 8388608 17059904
try to get http://10.4.3.5/ota/board_x2000/recovery/ota_v4/rootfs.squashfs.0009.693a4ae9002a03b7601fc058d75409f6
Writing data to block 65 at offset 0x820000
Writing data to block 66 at offset 0x840000
Writing data to block 67 at offset 0x860000
Writing data to block 68 at offset 0x880000
Writing data to block 69 at offset 0x8a0000
Writing data to block 70 at offset 0x8c0000
Writing data to block 71 at offset 0x8e0000
Writing data to block 72 at offset 0x900000
ota: data processed: 77% 9437184 17059904
try to get http://10.4.3.5/ota/board_x2000/recovery/ota_v4/rootfs.squashfs.0010.3139739951fc05749014808426834e50
Writing data to block 73 at offset 0x920000
Writing data to block 74 at offset 0x940000
Writing data to block 75 at offset 0x960000
Writing data to block 76 at offset 0x980000
Writing data to block 77 at offset 0x9a0000
Writing data to block 78 at offset 0x9c0000
Writing data to block 79 at offset 0x9e0000
Writing data to block 80 at offset 0xa00000
ota: data processed: 83% 10485760 17059904
try to get http://10.4.3.5/ota/board_x2000/recovery/ota_v4/rootfs.squashfs.0011.50a5951366e3ae851f0b6296e4c2c4f6
Writing data to block 81 at offset 0xa20000
Writing data to block 82 at offset 0xa40000
Writing data to block 83 at offset 0xa60000
Writing data to block 84 at offset 0xa80000
Writing data to block 85 at offset 0xaa0000
Writing data to block 86 at offset 0xac0000
Writing data to block 87 at offset 0xae0000
Writing data to block 88 at offset 0xb00000
ota: data processed: 89% 11534336 17059904
try to get http://10.4.3.5/ota/board_x2000/recovery/ota_v4/rootfs.squashfs.0012.11a65d4fe33c58b6d79c5c7af4bd8195
Writing data to block 89 at offset 0xb20000
Writing data to block 90 at offset 0xb40000
Writing data to block 91 at offset 0xb60000
Writing data to block 92 at offset 0xb80000
Writing data to block 93 at offset 0xba0000
Writing data to block 94 at offset 0xbc0000
Writing data to block 95 at offset 0xbe0000
Writing data to block 96 at offset 0xc00000
ota: data processed: 96% 12582912 17059904
Writing data to block 97 at offset 0xc20000
Writing data to block 98 at offset 0xc40000
Writing data to block 99 at offset 0xc60000
Writing data to block 100 at offset 0xc80000
rootfs.squashfs read ok, now quit
ota: data processed: 100% 13254656 17059904
rootfs update done
Writing data to block 101 at offset 0xca0000
ECC failed: 0
ECC corrected: 0
Number of bad blocks: 0
Number of bbt blocks: 0
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x00000000 and ending at 0x00000100...
Erasing 128 Kibyte @ 0 -- 100 % complete 
Writing data to block 0 at offset 0x0
recovery update ok
current recovery version is 4
Please reboot to start recovery update
# 
# 
# 

首先对服务器的main_os版本进行检测，如服务器版本更高，则继续执行

如recovery版本不匹配或没有进行.recovery/recovery_version中版本的设置，则会从服务器中获取可用的recovery版本

检查可用后，进行重启操作并执行sh /etc/ota_bin/network_recovery_update_main_os.sh对main_os进行升级，升级结果如图

# sh network_recovery_update_main_os.sh 

try to get http://10.4.3.5/ota/board_x2000/ota_config.in
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/ota_v4.ok
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/ota_update.in
ota_kernel 1
ota_kernel_name xImage
ota_kernel_size 3805248
ota_kernel_md5 dc8f40dcd41d962d18ad3393231d563d
ota_rootfs 1
ota_rootfs_name rootfs.squashfs
ota_rootfs_size 41529344
ota_rootfs_md5 afa0f6c142d617dccbebd118a9dd8f88
ota_rtos 0
ota_rtos_name
ota_rtos_size
ota_rtos_md5
ECC failed: 0
ECC corrected: 0
Number of bad blocks: 0
Number of bbt blocks: 0
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x00000000 and ending at 0x00000100...
ECC failed: 0
ECC corrected: 0
Number of bad blocks: 0
Number of bbt blocks: 0
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x00000000 and ending at 0x00000100...
we are going to ota update
ota: started
start update kernel
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/ota_md5_xImage.dc8f40dcd41d962d18ad3393231d563d
Erasing 128 Kibyte @ 0 --  0 % complete try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/xImage.0000.dc8f40dcd41d962d18ad3393231d563d
Erasing 128 Kibyte @ 7e0000 -- 100 % complete 
Writing data to block 0 at offset 0x0
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/xImage.0001.0c84875c3e42258d3088cc376a6fdb24
Writing data to block 1 at offset 0x20000
Writing data to block 2 at offset 0x40000
Writing data to block 3 at offset 0x60000
Writing data to block 4 at offset 0x80000
Writing data to block 5 at offset 0xa0000
Writing data to block 6 at offset 0xc0000
Writing data to block 7 at offset 0xe0000
Writing data to block 8 at offset 0x100000
ota: data processed: 2% 1048576 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/xImage.0002.850f7e273254abdab90f1544383977f2
Writing data to block 9 at offset 0x120000
Writing data to block 10 at offset 0x140000
Writing data to block 11 at offset 0x160000
Writing data to block 12 at offset 0x180000
Writing data to block 13 at offset 0x1a0000
Writing data to block 14 at offset 0x1c0000
Writing data to block 15 at offset 0x1e0000
Writing data to block 16 at offset 0x200000
ota: data processed: 4% 2097152 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/xImage.0003.51c3f08cf0be07e58a784b655f45055d
Writing data to block 17 at offset 0x220000
Writing data to block 18 at offset 0x240000
Writing data to block 19 at offset 0x260000
Writing data to block 20 at offset 0x280000
Writing data to block 21 at offset 0x2a0000
Writing data to block 22 at offset 0x2c0000
Writing data to block 23 at offset 0x2e0000
Writing data to block 24 at offset 0x300000
ota: data processed: 6% 3145728 45334592
Writing data to block 25 at offset 0x320000
Writing data to block 26 at offset 0x340000
Writing data to block 27 at offset 0x360000
Writing data to block 28 at offset 0x380000
xImage read ok, now quit
Writing data to block 29 at offset 0x3a0000
ota: data processed: 8% 3805248 45334592
kernel update done
start update rootfs
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/ota_md5_rootfs.squashfs.afa0f6c142d617dccbebd118a9dd8f88
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0000.afa0f6c142d617dccbebd118a9dd8f88
Erasing 128 Kibyte @ 1700000 -- 56 % complete try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0001.6aa94692d1d2ae267e4e3c1f56da4481
Erasing 128 Kibyte @ 28e0000 -- 100 % complete 
Writing data to block 0 at offset 0x0
Writing data to block 1 at offset 0x20000
Writing data to block 2 at offset 0x40000
Writing data to block 3 at offset 0x60000
Writing data to block 4 at offset 0x80000
Writing data to block 5 at offset 0xa0000
Writing data to block 6 at offset 0xc0000
Writing data to block 7 at offset 0xe0000
ota: data processed: 10% 1048576 45334592
Writing data to block 8 at offset 0x100000
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0002.45d5530a73e49cbce6fc2a7d8990d303
Writing data to block 9 at offset 0x120000
Writing data to block 10 at offset 0x140000
Writing data to block 11 at offset 0x160000
Writing data to block 12 at offset 0x180000
Writing data to block 13 at offset 0x1a0000
Writing data to block 14 at offset 0x1c0000
Writing data to block 15 at offset 0x1e0000
Writing data to block 16 at offset 0x200000
ota: data processed: 13% 2097152 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0003.56602955b06f5c0c1f2a20da8822b299
Writing data to block 17 at offset 0x220000
Writing data to block 18 at offset 0x240000
Writing data to block 19 at offset 0x260000
Writing data to block 20 at offset 0x280000
Writing data to block 21 at offset 0x2a0000
Writing data to block 22 at offset 0x2c0000
Writing data to block 23 at offset 0x2e0000
Writing data to block 24 at offset 0x300000
ota: data processed: 15% 3145728 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0004.5052685bdf36e1406bd979f137d50594
Writing data to block 25 at offset 0x320000
Writing data to block 26 at offset 0x340000
Writing data to block 27 at offset 0x360000
Writing data to block 28 at offset 0x380000
Writing data to block 29 at offset 0x3a0000
Writing data to block 30 at offset 0x3c0000
Writing data to block 31 at offset 0x3e0000
Writing data to block 32 at offset 0x400000
ota: data processed: 17% 4194304 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0005.00a60afc560e32d7c66dd7f80aff774f
Writing data to block 33 at offset 0x420000
Writing data to block 34 at offset 0x440000
Writing data to block 35 at offset 0x460000
Writing data to block 36 at offset 0x480000
Writing data to block 37 at offset 0x4a0000
Writing data to block 38 at offset 0x4c0000
Writing data to block 39 at offset 0x4e0000
Writing data to block 40 at offset 0x500000
ota: data processed: 19% 5242880 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0006.56c22219f65ad4126aab1f3a30a826e7
Writing data to block 41 at offset 0x520000
Writing data to block 42 at offset 0x540000
Writing data to block 43 at offset 0x560000
Writing data to block 44 at offset 0x580000
Writing data to block 45 at offset 0x5a0000
Writing data to block 46 at offset 0x5c0000
Writing data to block 47 at offset 0x5e0000
Writing data to block 48 at offset 0x600000
ota: data processed: 22% 6291456 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0007.d25971ffb5fc94e105707e37e108c13f
Writing data to block 49 at offset 0x620000
Writing data to block 50 at offset 0x640000
Writing data to block 51 at offset 0x660000
Writing data to block 52 at offset 0x680000
Writing data to block 53 at offset 0x6a0000
Writing data to block 54 at offset 0x6c0000
Writing data to block 55 at offset 0x6e0000
Writing data to block 56 at offset 0x700000
ota: data processed: 24% 7340032 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0008.f970a1ef9b47b59542d46615bf6f41e6
Writing data to block 57 at offset 0x720000
Writing data to block 58 at offset 0x740000
Writing data to block 59 at offset 0x760000
Writing data to block 60 at offset 0x780000
Writing data to block 61 at offset 0x7a0000
Writing data to block 62 at offset 0x7c0000
Writing data to block 63 at offset 0x7e0000
Writing data to block 64 at offset 0x800000
ota: data processed: 26% 8388608 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0009.bfafbbe31999628b62e3611a85ccf9e0
Writing data to block 65 at offset 0x820000
Writing data to block 66 at offset 0x840000
Writing data to block 67 at offset 0x860000
Writing data to block 68 at offset 0x880000
Writing data to block 69 at offset 0x8a0000
Writing data to block 70 at offset 0x8c0000
Writing data to block 71 at offset 0x8e0000
Writing data to block 72 at offset 0x900000
ota: data processed: 29% 9437184 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0010.db87ce79f04aba4b330ff810a4e0ca0f
Writing data to block 73 at offset 0x920000
Writing data to block 74 at offset 0x940000
Writing data to block 75 at offset 0x960000
Writing data to block 76 at offset 0x980000
Writing data to block 77 at offset 0x9a0000
Writing data to block 78 at offset 0x9c0000
Writing data to block 79 at offset 0x9e0000
Writing data to block 80 at offset 0xa00000
ota: data processed: 31% 10485760 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0011.11d3e67387ba0360240cb88ae86ff01b
Writing data to block 81 at offset 0xa20000
Writing data to block 82 at offset 0xa40000
Writing data to block 83 at offset 0xa60000
Writing data to block 84 at offset 0xa80000
Writing data to block 85 at offset 0xaa0000
Writing data to block 86 at offset 0xac0000
Writing data to block 87 at offset 0xae0000
Writing data to block 88 at offset 0xb00000
ota: data processed: 33% 11534336 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0012.483e6c7a6e87c81a7462cf12942e6adf
Writing data to block 89 at offset 0xb20000
Writing data to block 90 at offset 0xb40000
Writing data to block 91 at offset 0xb60000
Writing data to block 92 at offset 0xb80000
Writing data to block 93 at offset 0xba0000
Writing data to block 94 at offset 0xbc0000
Writing data to block 95 at offset 0xbe0000
Writing data to block 96 at offset 0xc00000
ota: data processed: 36% 12582912 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0013.964b46b7fd76f51a1c2be213aaf0dd9f
Writing data to block 97 at offset 0xc20000
Writing data to block 98 at offset 0xc40000
Writing data to block 99 at offset 0xc60000
Writing data to block 100 at offset 0xc80000
Writing data to block 101 at offset 0xca0000
Writing data to block 102 at offset 0xcc0000
Writing data to block 103 at offset 0xce0000
Writing data to block 104 at offset 0xd00000
ota: data processed: 38% 13631488 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0014.68c7c287508688aafcf58fa41a8f5e7b
Writing data to block 105 at offset 0xd20000
Writing data to block 106 at offset 0xd40000
Writing data to block 107 at offset 0xd60000
Writing data to block 108 at offset 0xd80000
Writing data to block 109 at offset 0xda0000
Writing data to block 110 at offset 0xdc0000
Writing data to block 111 at offset 0xde0000
Writing data to block 112 at offset 0xe00000
ota: data processed: 40% 14680064 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0015.a62765f7604392c4768e055c5376fdd0
Writing data to block 113 at offset 0xe20000
Writing data to block 114 at offset 0xe40000
Writing data to block 115 at offset 0xe60000
Writing data to block 116 at offset 0xe80000
Writing data to block 117 at offset 0xea0000
Writing data to block 118 at offset 0xec0000
Writing data to block 119 at offset 0xee0000
Writing data to block 120 at offset 0xf00000
ota: data processed: 43% 15728640 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0016.b21e268562ffe3da2292cd3aea1e387d
Writing data to block 121 at offset 0xf20000
Writing data to block 122 at offset 0xf40000
Writing data to block 123 at offset 0xf60000
Writing data to block 124 at offset 0xf80000
Writing data to block 125 at offset 0xfa0000
Writing data to block 126 at offset 0xfc0000
Writing data to block 127 at offset 0xfe0000
Writing data to block 128 at offset 0x1000000
ota: data processed: 45% 16777216 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0017.57c46af39008d23a3d71aa8f94201945
Writing data to block 129 at offset 0x1020000
Writing data to block 130 at offset 0x1040000
Writing data to block 131 at offset 0x1060000
Writing data to block 132 at offset 0x1080000
Writing data to block 133 at offset 0x10a0000
Writing data to block 134 at offset 0x10c0000
Writing data to block 135 at offset 0x10e0000
Writing data to block 136 at offset 0x1100000
ota: data processed: 47% 17825792 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0018.7777b57f919e99dc18d6ff5b04eb9a6c
Writing data to block 137 at offset 0x1120000
Writing data to block 138 at offset 0x1140000
Writing data to block 139 at offset 0x1160000
Writing data to block 140 at offset 0x1180000
Writing data to block 141 at offset 0x11a0000
Writing data to block 142 at offset 0x11c0000
Writing data to block 143 at offset 0x11e0000
Writing data to block 144 at offset 0x1200000
ota: data processed: 50% 18874368 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0019.fcfddb2fd9899e13cb3275329020814b
Writing data to block 145 at offset 0x1220000
Writing data to block 146 at offset 0x1240000
Writing data to block 147 at offset 0x1260000
Writing data to block 148 at offset 0x1280000
Writing data to block 149 at offset 0x12a0000
Writing data to block 150 at offset 0x12c0000
Writing data to block 151 at offset 0x12e0000
Writing data to block 152 at offset 0x1300000
ota: data processed: 52% 19922944 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0020.ec4df4ec49859dd21ec7a7f2af0a51f3
Writing data to block 153 at offset 0x1320000
Writing data to block 154 at offset 0x1340000
Writing data to block 155 at offset 0x1360000
Writing data to block 156 at offset 0x1380000
Writing data to block 157 at offset 0x13a0000
Writing data to block 158 at offset 0x13c0000
Writing data to block 159 at offset 0x13e0000
Writing data to block 160 at offset 0x1400000
ota: data processed: 54% 20971520 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0021.cef10b7a4bac5b0645fd9401a87e7933
Writing data to block 161 at offset 0x1420000
Writing data to block 162 at offset 0x1440000
Writing data to block 163 at offset 0x1460000
Writing data to block 164 at offset 0x1480000
Writing data to block 165 at offset 0x14a0000
Writing data to block 166 at offset 0x14c0000
Writing data to block 167 at offset 0x14e0000
Writing data to block 168 at offset 0x1500000
ota: data processed: 56% 22020096 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0022.5b9a1ae89d2e6f4d9d4b1f83d785e037
Writing data to block 169 at offset 0x1520000
Writing data to block 170 at offset 0x1540000
Writing data to block 171 at offset 0x1560000
Writing data to block 172 at offset 0x1580000
Writing data to block 173 at offset 0x15a0000
Writing data to block 174 at offset 0x15c0000
Writing data to block 175 at offset 0x15e0000
Writing data to block 176 at offset 0x1600000
ota: data processed: 59% 23068672 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0023.f5a3dc9c2ab3ce3da0871ec0327a1d8f
Writing data to block 177 at offset 0x1620000
Writing data to block 178 at offset 0x1640000
Writing data to block 179 at offset 0x1660000
Writing data to block 180 at offset 0x1680000
Writing data to block 181 at offset 0x16a0000
Writing data to block 182 at offset 0x16c0000
Writing data to block 183 at offset 0x16e0000
Writing data to block 184 at offset 0x1700000
ota: data processed: 61% 24117248 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0024.a762a7f6825c20da006ec905957aa96b
Writing data to block 185 at offset 0x1720000
Writing data to block 186 at offset 0x1740000
Writing data to block 187 at offset 0x1760000
Writing data to block 188 at offset 0x1780000
Writing data to block 189 at offset 0x17a0000
Writing data to block 190 at offset 0x17c0000
Writing data to block 191 at offset 0x17e0000
Writing data to block 192 at offset 0x1800000
ota: data processed: 63% 25165824 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0025.01e38d6094b70871e00b57d538ebe996
Writing data to block 193 at offset 0x1820000
Writing data to block 194 at offset 0x1840000
Writing data to block 195 at offset 0x1860000
Writing data to block 196 at offset 0x1880000
Writing data to block 197 at offset 0x18a0000
Writing data to block 198 at offset 0x18c0000
Writing data to block 199 at offset 0x18e0000
Writing data to block 200 at offset 0x1900000
ota: data processed: 66% 26214400 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0026.d4df41e6a7d50c11f2a31adcf7399c36
Writing data to block 201 at offset 0x1920000
Writing data to block 202 at offset 0x1940000
Writing data to block 203 at offset 0x1960000
Writing data to block 204 at offset 0x1980000
Writing data to block 205 at offset 0x19a0000
Writing data to block 206 at offset 0x19c0000
Writing data to block 207 at offset 0x19e0000
Writing data to block 208 at offset 0x1a00000
ota: data processed: 68% 27262976 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0027.d182615dabf7ae7a86691ec2ab775ca3
Writing data to block 209 at offset 0x1a20000
Writing data to block 210 at offset 0x1a40000
Writing data to block 211 at offset 0x1a60000
Writing data to block 212 at offset 0x1a80000
Writing data to block 213 at offset 0x1aa0000
Writing data to block 214 at offset 0x1ac0000
Writing data to block 215 at offset 0x1ae0000
Writing data to block 216 at offset 0x1b00000
ota: data processed: 70% 28311552 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0028.d6d35cfc033b75654eaff16616e5e300
Writing data to block 217 at offset 0x1b20000
Writing data to block 218 at offset 0x1b40000
Writing data to block 219 at offset 0x1b60000
Writing data to block 220 at offset 0x1b80000
Writing data to block 221 at offset 0x1ba0000
Writing data to block 222 at offset 0x1bc0000
Writing data to block 223 at offset 0x1be0000
Writing data to block 224 at offset 0x1c00000
ota: data processed: 73% 29360128 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0029.ac7c8ecfc3042bb34fa1d0d31045dcd6
Writing data to block 225 at offset 0x1c20000
Writing data to block 226 at offset 0x1c40000
Writing data to block 227 at offset 0x1c60000
Writing data to block 228 at offset 0x1c80000
Writing data to block 229 at offset 0x1ca0000
Writing data to block 230 at offset 0x1cc0000
Writing data to block 231 at offset 0x1ce0000
Writing data to block 232 at offset 0x1d00000
ota: data processed: 75% 30408704 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0030.413f4db3911a0623498e4515d2ffe168
Writing data to block 233 at offset 0x1d20000
Writing data to block 234 at offset 0x1d40000
Writing data to block 235 at offset 0x1d60000
Writing data to block 236 at offset 0x1d80000
Writing data to block 237 at offset 0x1da0000
Writing data to block 238 at offset 0x1dc0000
Writing data to block 239 at offset 0x1de0000
Writing data to block 240 at offset 0x1e00000
ota: data processed: 77% 31457280 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0031.e2c2f60d2ae930b994983da7617120e7
Writing data to block 241 at offset 0x1e20000
Writing data to block 242 at offset 0x1e40000
Writing data to block 243 at offset 0x1e60000
Writing data to block 244 at offset 0x1e80000
Writing data to block 245 at offset 0x1ea0000
Writing data to block 246 at offset 0x1ec0000
Writing data to block 247 at offset 0x1ee0000
Writing data to block 248 at offset 0x1f00000
ota: data processed: 80% 32505856 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0032.3da250989828403ab35fe505ce635d29
Writing data to block 249 at offset 0x1f20000
Writing data to block 250 at offset 0x1f40000
Writing data to block 251 at offset 0x1f60000
Writing data to block 252 at offset 0x1f80000
Writing data to block 253 at offset 0x1fa0000
Writing data to block 254 at offset 0x1fc0000
Writing data to block 255 at offset 0x1fe0000
Writing data to block 256 at offset 0x2000000
ota: data processed: 82% 33554432 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0033.f5feac53beae88f1171d5e16e98cdbf8
Writing data to block 257 at offset 0x2020000
Writing data to block 258 at offset 0x2040000
Writing data to block 259 at offset 0x2060000
Writing data to block 260 at offset 0x2080000
Writing data to block 261 at offset 0x20a0000
Writing data to block 262 at offset 0x20c0000
Writing data to block 263 at offset 0x20e0000
Writing data to block 264 at offset 0x2100000
ota: data processed: 84% 34603008 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0034.bb0a101d673b59d249a0fea72d7cdffa
Writing data to block 265 at offset 0x2120000
Writing data to block 266 at offset 0x2140000
Writing data to block 267 at offset 0x2160000
Writing data to block 268 at offset 0x2180000
Writing data to block 269 at offset 0x21a0000
Writing data to block 270 at offset 0x21c0000
Writing data to block 271 at offset 0x21e0000
Writing data to block 272 at offset 0x2200000
ota: data processed: 87% 35651584 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0035.4982d1c5aa3ceb05224ee40a1e892d1f
Writing data to block 273 at offset 0x2220000
Writing data to block 274 at offset 0x2240000
Writing data to block 275 at offset 0x2260000
Writing data to block 276 at offset 0x2280000
Writing data to block 277 at offset 0x22a0000
Writing data to block 278 at offset 0x22c0000
Writing data to block 279 at offset 0x22e0000
Writing data to block 280 at offset 0x2300000
ota: data processed: 89% 36700160 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0036.43bc1f56e58ac2f4e8e3be149026e776
Writing data to block 281 at offset 0x2320000
Writing data to block 282 at offset 0x2340000
Writing data to block 283 at offset 0x2360000
Writing data to block 284 at offset 0x2380000
Writing data to block 285 at offset 0x23a0000
Writing data to block 286 at offset 0x23c0000
Writing data to block 287 at offset 0x23e0000
Writing data to block 288 at offset 0x2400000
ota: data processed: 91% 37748736 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0037.f80bb39c7e176d99435025e1c7fe398d
Writing data to block 289 at offset 0x2420000
Writing data to block 290 at offset 0x2440000
Writing data to block 291 at offset 0x2460000
Writing data to block 292 at offset 0x2480000
Writing data to block 293 at offset 0x24a0000
Writing data to block 294 at offset 0x24c0000
Writing data to block 295 at offset 0x24e0000
Writing data to block 296 at offset 0x2500000
ota: data processed: 93% 38797312 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0038.dc292365d86e004254fe64d71b63e6a3
Writing data to block 297 at offset 0x2520000
Writing data to block 298 at offset 0x2540000
Writing data to block 299 at offset 0x2560000
Writing data to block 300 at offset 0x2580000
Writing data to block 301 at offset 0x25a0000
Writing data to block 302 at offset 0x25c0000
Writing data to block 303 at offset 0x25e0000
Writing data to block 304 at offset 0x2600000
ota: data processed: 96% 39845888 45334592
try to get http://10.4.3.5/ota/board_x2000/main_os/ota_v4/rootfs.squashfs.0039.78822d51b9b1a5b48502ad6b836b2c57
Writing data to block 305 at offset 0x2620000
Writing data to block 306 at offset 0x2640000
Writing data to block 307 at offset 0x2660000
Writing data to block 308 at offset 0x2680000
Writing data to block 309 at offset 0x26a0000
Writing data to block 310 at offset 0x26c0000
Writing data to block 311 at offset 0x26e0000
Writing data to block 312 at offset 0x2700000
ota: data processed: 98% 40894464 45334592
Writing data to block 313 at offset 0x2720000
Writing data to block 314 at offset 0x2740000
Writing data to block 315 at offset 0x2760000
Writing data to block 316 at offset 0x2780000
rootfs.squashfs read ok, now quit
ota: data processed: 100% 41529344 45334592
rootfs update done
ECC failed: 0
ECC corrected: 0
Number of bad blocks: 0
Number of bbt blocks: 0
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x00000000 and ending at 0x00000100...
Erasing 128 Kibyte @ 0 -- 100 % complete 
Writing data to block 0 at offset 0x0
ota update ok
Please reboot to return main os
ota: stoped success
# 

"network_main_os_update_recovery.sh" 脚本的升级过程如下：

 1 检查是否设置过下次启动项(检查文件是否存在/tmp/ota_boot_set),如未设置过,则继续
 2 下载测试服务器中的 ota_config.in文件,获取字段 current_verison= 后的版本信息,为服务器上可用的主系统升级包镜像的版本号
 3 获取本地的主系统版本信息,信息存放在/etc/ota_info中,并与服务器中的版本比较,如服务器版本更高,则继续
 4 下载测试服务器中的 main_os/ota_v4/ota_v4.ok 文件,如果无法下载,说明当前v4版本还没有准备好,则退出
 5 下载测试服务器中的 main_os/ota_v4/ota_update.in 文件
 6 获取 ota_version= 字段,如果和 ota_config.in 中获取的版本信息不相等,则退出
 7 获取主系统的kernel rootfs分区,检查kernel 分区大小,检查rootfs 分区大小是否满足升级包要求,如不满足,则退出
 8 下载测试服务器中的 ota_config.in,获取字段 recovery_version= 后的版本信息,为服务器上可用的recovery系统升级包镜像的版本号
 9 获取本地的recovery系统版本信息,信息存放在/usr/data/.recovery/recovery_version中,并与服务器中的版本比较,如服务器版本更高,则继续执行升级操作,否则,无需升级recovery系统,设置启动分区为recovery系统,并退出,返回值为0
10 下载测试服务器中的 recovery/ota_v4/ota_v4.ok 文件,如果无法下载,说明当前v4版本还没有准备好,则退出
11 下载测试服务器中的 recovery/ota_v4/ota_update.in 文件
12 获取 ota_version= 字段,如果和 ota_config.in 中获取的版本信息不相等,则退出
13  获取img_type img_name img_size img_md5 字段，并且验证和保存
    ota_kernel ota_kernel_name ota_kernel_size ota_kernel_md5
    ota_rootfs ota_rootfs_name ota_rootfs_size ota_rootfs_md5
14  获取需要升级的kernel rootfs分区，检查kernel分区大小，检查rootfs 分区大小是否满足升级包要求
15  开始升级kernel
16  启动升级脚本 /etc/ota_bin/ota_update_kernel.sh
17  调用download_ota_img 函数下载 xImage 相关文件，校验 md5值
18  去掉文件 md5 后缀，生成 xImage.000N，再生成 xImage.000N.ok 通知升级脚本读取 xImage.000N数据
19  继续下载新的 xImage.000N+1.md5文件，等待xImage.000N.done产生，并删除 xImage.000N
20  继续11的步骤，直到xImage 相关文件下载完成
21  等待xImage.ok 生成，表示升级脚本成功，或者 xImage.failed 表示升级脚本失败
22  按前面的步骤升级rootfs
23  如果升级成功，则设置启动分区为recovery系统的分区，返回值0
24  如果什么都没有升级，也没有出错，则返回值2,中间任意步骤出错，返回1
 
脚本执行后，返回值为0则表示已经准备好进入recovery系统对主系统进行升级，且已经设置下次启动分区为recovery系统，重启即可进入recovery系统

"network_recovery_update_main_os.sh"脚本的升级过程如下：

 1  下载测试服务器的 ota_config.in文件，解析main_os版本号
 2  下载测试服务器 main_os/ota_v4/ota_v4.ok 文件，如果无法下载，说明当前v4版本还没有准备好，则退出并提示错误并退出升级流程（理论上不会存在这种情况，因为在main_os中就会进行此项检验）
 3  下载服务器中 ota_v4/ota_update.in 文件
 4  获取 ota_version=字段，如果和当前版本不相等，则退出main_os升级流程（在main_os中已做检验）
 5  获取img_type img_name img_size img_md5 字段，并且验证和保存
    ota_kernel ota_kernel_name ota_kernel_size ota_kernel_md5
    ota_rootfs ota_rootfs_name ota_rootfs_size ota_rootfs_md5
 6  获取需要升级的kernel rootfs分区，检查kernel分区大小，检查rootfs 分区大小是否满足升级包要求（在main_os中已做检验）
 7  开始升级kernel
 8  启动升级脚本 /etc/ota_bin/ota_update_kernel.sh
 9  调用download_ota_img 函数下载 xImage 相关文件，校验 md5值
10  去掉文件 md5 后缀，生成 xImage.000N，再生成 xImage.000N.ok 通知升级脚本读取 xImage.000N数据
11  继续下载新的 xImage.000N+1.md5文件，等待xImage.000N.done产生，并删除 xImage.000N
12  继续11的步骤，直到xImage 相关文件下载完成
13  等待xImage.ok 生成，表示升级脚本成功，或者 xImage.failed 表示升级脚本失败
14  按前面的步骤升级rootfs
15  如果升级成功，则设置启动分区为main_os的分区，返回值0
16  如果什么都没有升级，也没有出错，则返回值2,中间任意步骤出错，返回1

成功完成升级后，脚本返回值为0，重启即可返回主系统，如不成功，请依据错误信息自行设计升级失败的处理策略。

2 ota 启动分区

设置ota启动分区，ota分区用来存储关键字ota:kernel或ota:kernel2

一般将ota:kernel作为main_os的启动标志，ota:kernel2作为recovery系统的启动标志，uboot会检查ota分区的内容，以决定启动哪个分区：

#擦除ota分区的一块数据

flash_erase /dev/mtd5 0 1

#写入启动分区名 ota:kernel2 或者 ota:kernel

printf "%-256s" "ota:kernel2" | nandwrite -s 0 -p /dev/mtd5 -

#查看当前的启动分区名

nanddump -s 0 -l 256 /dev/mtd5 -a
#注意:/dev/mtd5 对应ota分区,可用"cat /proc/mtd"命令查看

九 ota 补充说明

1 ota_bin 目录

# ls /etc/ota_bin/

#ota升级过程均使用脚本编写，都有中文注释

# 升级主程序 供开发者调用

local_ota_update.sh
ota 本地升级主程序，探测是否需要 ota 升级，以及本地读取 ota 镜像执行 ota 升级流程

network_ota_update.sh
ota 网络升级主程序，探测是否需要 ota 升级，以及下载 ota 镜像执行 ota 升级流程

network_main_os_update_recovery.sh
ota recovery方式进行ota升级的主程序，主系统 中用来探测是否需要 ota 升级，下载 recovery 镜像以及升级 recovery 系统

network_recovery_update_main_os.sh
ota recovery方式进行ota升级的主程序，recovery系统 中用来下载 主系统 镜像以及升级 主系统

# 功能性程序与函数

ota_local_method.sh
ota 升级程序的设备端方法和升级流程回调的实现

ota_update_kernel.sh
ota kernel的升级方法

ota_update_rootfs_squashfs.sh
ota rootfs.squashfs 的升级方法

ota_update_rtos_bin.sh
ota rtos.bin 的升级方法

ota_utils.sh
ota 用到的实用函数集

ota_img_data_provider.sh
ota 流式升级方式的数据提供者
被ota_update_kernel.sh ota_update_rootfs_squashfs.sh 调用

main_os_info_check.sh
ota 检查 主系统 的升级信息可用性
被network_main_os_update_recovery.sh 调用

recovery_version_utils.sh
ota 用于检测recovery版本信息的工具脚本
被network_main_os_update_recovery.sh 调用

2 ota 文件组织策略

编译ota升级镜像时，kernel和buildroot的镜像文件被拆分成多份，分成多个文件，依次追加md5值，并且保存md5值用做文件校验，这样的好处是可以确保下载的文件不会因为服务器缓存的问题而导致的包之间不一致的问题。即使文件名碰巧重合，设备端也可以通过后缀的md5值进行校验

1 以kernel(xImage)为例子，将 xImage(大小 3776576)拆分成4个文件：

xImage.0000.affe7e73ecb13d69956e401d0421ec62
xImage.0001.2102e4f4c28a9925f012eb4f3e0c8c9f
xImage.0002.48e976fc59a9849ff1ad35a31e4509f8
xImage.0003.1ef4ff4a1efec9eb35af6639d8d7d0e6

2 对xImage 以及 xImage.000 求 md5sum,关键字 img_md5 保存 xImage.md5sum,ota_md5_xImage 保存 xImage.000的md5sum 用于下载后设备校验

3 所有的xImage 相关文件被依次追加前一个xImage包文件的md5值作为后缀：

1 ota_md5_xImage -> ota_md5_xImage."xImage.md5"
2 xImage.0000 -> xImage.0000."xImage.md5"
3 xImage.0001 -> xImage.0001."xImage.0000.md5"
4 xImage.0002 -> xImage.0002."xImage.0001.md5"
5 xImage.0003 -> xImage.0003."xImage.0002.md5"

3 ota 分区策略

更新设备分区的时候必须保证当前被更新的分区不被占用，所以rootfs分区的程序不能更新rootfs分区的内容，只能去更新另外一个rootfs分区。

从安全的角度上也是一样，如果当前能更新程序所在的分区，比如 rootfs 打包在kernel中的情况，但是遇到掉电/死机/重启等不正常的时候，再一次启动分区的内容不是完整的，所以设备就会无法启动。

所以对于recovery进行ota升级的方法，必须为ota升级程序划分recovery系统所用的kernel分区和rootfs分区，另外uboot不能进行升级，一旦升级失败机器将无法启动。

recovery进行ota方式采用的策略为：main_os中的程序（在rootfs分区）升级recovery系统（对应kernel2与rootfs2） 反之recovery系统升级main_os（对应kernel，rootfs）。两个系统的启动根据”ota“中的关键字进行启动，分区列表的结构如下，针对 128M nand ，分区大小可以根据实际情况进行调整。(recovery系统占用的分区较小，可以根据实际情况进行调整)

1  uboot            1M
2  kernel           4M
3  rootfs           48M
4  kernel2          4M
5  rootfs2          48M
6  ota              1M
7  userdata         剩余大小

十 ota 常见问题汇总

1 ota升级完成无法进入到新的系统？

​ 可以检查设备端的固件uboot是否支持ota功能。具体可以参考上面 4.1 uboot 添加支持 ota 功能。

2 设备端无法通过wget获取到升级服务器上的文件？

可以检查电脑端的防火墙是否关闭。如果是局域网，要检查你设备端的网络和你的升级服务器上的网络是否在同一个网段。