[MTK项目] 6.0mOTA升级失败分析

Command: "/sbin/recovery" "--update_package=@/cache/recovery/block.map" "--locale=zh_CN"

Supported API: 3

update_package = @/cache/recovery/block.map

I:Finding update package...

I:Update location: @/cache/recovery/block.map

Opening update package...

E:failed to map file

E:install package error, result = 2

The update.zip is corrupted

Installation aborted.

OTA failed! Please power off the device to keep it in this state and file a bug report! write result : MOTA_RESULT_FILE

write result : remove_mota_file

write result : remove_mota_file(DEFAULT_MOTA_FILE)

Supported API: 3

update_package = NULL

I:no boot messages recovery

I:[1]check the otaupdate is done!

I:Saving locale "zh_CN"

升级失败和升级成功的log差异再次

update_package 是否为空

MTK搜索

[FAQ17442][Recovery][Common]Android M 版本

data加密后升级包放入/data分区如何升级？

[DESCRIPTION]

Android M 版本，data加密后，开启MTK_SHARED_SDCARD并把升级包放入内卡；或者有需要把升级包放入/data分区来升级，一般这种情况，直接按键进入recovery

mode，选择apply from sdcard来实现升级，是行不通的，建议在验证升级时，使用

adb 命令的方式升级。

[SOLUTION]

步骤如下：

1、在normal mode先把升级包(update.zip) push 到data分区目，比如

/data/update.zip.

2、adb shell 下执行：system/bin/uncrypt /data/update.zip

/cache/recovery/block.map

注意：要等待一段时间，直到命令执行退出…，然后在执行如下命令；

3、adb shell echo \"--update_package=@/cache/recovery/block.map\" >

/cache/recovery/command

4、adb reboot recovery

最后手机reboot进入recovery mode开始升级，如果以上各个步骤遇到问题，或者不

能升级，欢迎提eservice联系mediatek。

可以看出这里应该和加密版本有关系，加密版本的OTA在线升级的逻辑和SD卡的升级逻辑不通

通过log也能看出

sd卡升级是没有走这边的解析和update_package赋值的

关键逻辑update_package=打出位置位于recovery.cpp

main函数下：

update_package=mt_main_init_fota(update_package);

fprintf(stdout, "update_package = %s\n", update_package ? update_package : "NULL");

Command: "/sbin/recovery" "--update_package=@/cache/recovery/block.map" "--locale=zh_CN"

打印位置：

printf("Command:");

for (arg = 0; arg < argc; arg++) {

printf(" \"%s\"", argv[arg]);

}

printf("\n");

如下是正常升级成功的

is_gpt = 1

gpt prefix is /dev/block/platform/mtk-msdc.0/11230000.msdc0/by-name

I:no boot messages

I:Open /cache/recovery/command fail errno = No such file or directory

locale is [zh_CN]

stage is []

reason is [(null)]

cannot find/open a drm device: No such file or directory

fb0 reports (possibly inaccurate):

如下是正常升级出问题的

is_gpt = 1

gpt prefix is /dev/block/platform/mtk-msdc.0/11230000.msdc0/by-name

I:no boot messages

I:Got arguments from /cache/recovery/command