[1/2] [WIP] health: Add support for storage stats and health#628
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rebase please |
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Rebased. This is NOT ready for merge! Still need testing on UFS devices and remove a few TODOs. Code review on C++ files is appreciated :) |
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updates? |
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It's more of a toy functionality, android doesn't really use the stats for anything important. |
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Ping @oshmoun @luk1337 @MarijnS95 for review ( & @kholk if not too busy / disgusted by C++) |
This implements the missing health@2.0 function calls: - get_storage_info() - get_disk_stats() Also introduce a HealthTestingMock for debugging purposes. It is only available in userdebug/eng builds. The prop "persist.vendor.health.fake_storage=1" will trigger fake stats. Storage health reporting is not available for UFS since there is no kernel support for UFS health as of 2019-07-12. Since the SODP devices all have different emmc nodes, attempt to resolve `/sys/block/mmcblk0` to e.g. `/sys/devices/platform/soc/7464900.sdhci/mmc_host/mmc0/mmc0:0001/block/mmcblk0`, which gives use the emmc node at `/sys/devices/platform/soc/7464900.sdhci/mmc_host/mmc0/mmc0:0001` For UFS devices, construct the sysfs paths based on the property `ro.boot.bootdevice`, which would look like e.g. `7464900.ufshci`, giving us a path such as: `/sys/devices/platform/soc/7464900.ufshci`. (Currently unused of course) The nodes will have to labeled in the individual platforms' sepolicy dirs. SODP devices report pre-EOL info, two lifetime values and an EMMC revision. Disk statistics are taken from the generic `stat` file, just as the default implemention of `storaged` and the crosshatch/bonito health HAL do.
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Still not really useful on Android 11 |
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health: Add support for storage stats and health
This implements the missing health@2.0 function calls:
get_storage_info()get_disk_stats()Also introduce a
HealthTestingMockfor debugging purposes. It is only available in userdebug/eng builds.The prop
persist.vendor.health.fake_storage=1will trigger fake stats.Storage health reporting is not available for UFS since there is no kernel support for UFS health as of 2019-07-12.
Since the SODP devices all have different emmc nodes, attempt to resolve
/sys/block/mmcblk0to e.g./sys/devices/platform/soc/7464900.sdhci/mmc_host/mmc0/mmc0:0001/block/mmcblk0, which gives use the emmc node at/sys/devices/platform/soc/7464900.sdhci/mmc_host/mmc0/mmc0:0001For UFS devices, construct the sysfs paths based on the property
ro.boot.bootdevice, which would look like e.g.7464900.ufshci, giving us a path such as:/sys/devices/platform/soc/7464900.ufshci.(Currently unused of course)
The nodes will have to labeled in the individual platforms' sepolicy dirs:
SODP devices report pre-EOL info, two lifetime values and an EMMC revision.
Disk statistics are taken from the generic
statfile, just as the default implemention ofstoragedand the crosshatch/bonito health HAL do.health: Refactor and simplify, drop healthd shims
This change drastically simplifies the code, which had been written under the assumption that AOSP would drop healthd soon. The wrapper libraries make little sense, just drop them.Update: The "simplify" commits have been split out into #647