由于VF 架构， 所以镜像的打包时间可能存在偏差， 如 boot.img 和 客制化的一些镜像打包 可能会在 vendor 侧进行打包。
而 与system 侧进行merge 时，时间戳比较乱，为了解决这个问题，让时间戳进行统一。
使用adb方式验证
- 进入recovery模式
adb reboot recovery
- 稍等一会界面会提示
Now send the package you want to apply
to the device with "adb sidelaod <filename>"...
- 输入命令开始升级
adb sideload Z:\xxx\xxx\ota\update.zip
update.zip是制作好的差分包
报ErrorCode::kPayloadTimestampError (51)
[ 41.140193] update_engine_sideload E 11-29 07:06:04 361 361 [ERROR:delta_performer.cc(1170)] The current OS build timestamp (1732851959) is newer than the maximum timestamp in the manifest (1732851610)
[ 41.140394] update_engine_sideload E 11-29 07:06:04 361 361 [ERROR:download_action.cc(222)] Error ErrorCode::kPayloadTimestampError (51) in DeltaPerformer's Write method when processing the received payload -- Terminating processing
[ 41.140478] update_engine_sideload I 11-29 07:06:04 361 361 [INFO:delta_performer.cc(217)] Discarding 210485 unused downloaded bytes
[ 41.153646] update_engine_sideload I 11-29 07:06:04 361 361 [INFO:multi_range_http_fetcher.cc(177)] Received transfer terminated.
[ 41.153736] update_engine_sideload I 11-29 07:06:04 361 361 [INFO:multi_range_http_fetcher.cc(129)] TransferEnded w/ code 200
[ 41.153787] update_engine_sideload I 11-29 07:06:04 361 361 [INFO:multi_range_http_fetcher.cc(131)] Terminating.
[ 41.153866] update_engine_sideload I 11-29 07:06:04 361 361 [INFO:action_processor.cc(116)] ActionProcessor: finished DownloadAction with code ErrorCode::kPayloadTimestampError
[ 41.153917] update_engine_sideload I 11-29 07:06:04 361 361 [INFO:action_processor.cc(121)] ActionProcessor: Aborting processing due to failure.
[ 41.153994] update_engine_sideload I 11-29 07:06:04 361 361 [INFO:update_attempter_android.cc(548)] Processing Done.
由于 打包时间 差异，所以导致 时间戳 比较乱。
解决办法
提取 目标版本 和源版本 的镜像中的 时间戳。
按时间戳 大的 （最后编译）进行打包到 ota 升级包中
- /vendor_ap_s0/build/make/tools/releasetools/ota_utils.py
target_boot_timestamp = 0
source_boot_timestamp = 0
+ target_system_timestamp = 0
+ source_system_timestamp = 0
if target_info:
partition_prop = target_info.get("boot.build.prop")
if partition_prop:
boot_timestamp = partition_prop.GetProp("ro.bootimage.build.date.utc")
if boot_timestamp:
target_boot_timestamp = int(boot_timestamp)
+ partition_prop = target_info.get("system.build.prop")
+ if partition_prop:
+ system_timestamp = partition_prop.GetProp("ro.system.build.date.utc")
+ if system_timestamp:
+ target_system_timestamp = int(system_timestamp)
if source_info:
partition_prop = source_info.get("boot.build.prop")
if partition_prop:
boot_timestamp = partition_prop.GetProp("ro.bootimage.build.date.utc")
if boot_timestamp:
source_boot_timestamp = int(boot_timestamp)
- target_max_timestamp = max(target_boot_timestamp, source_boot_timestamp)
- source_max_timestamp = source_boot_timestamp
+ partition_prop = source_info.get("system.build.prop")
+ if partition_prop:
+ system_timestamp = partition_prop.GetProp("ro.system.build.date.utc")
+ if system_timestamp:
+ source_system_timestamp = int(system_timestamp)
+ target_max_timestamp = max(target_boot_timestamp, source_boot_timestamp, target_system_timestamp,
+ source_system_timestamp)
+ source_max_timestamp = max(source_boot_timestamp, source_system_timestamp)
for partition in PARTITIONS_WITH_BUILD_PROP:
partition_prop_key = "{}.build.prop".format(partition)
if partition == "boot":
boot.img 编译时间ro.bootimage.build.date.utc
system 编译时间ro.system.build.date.utc
比较哪个数值越大,就表明版本后面编译的时间来决定。