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https://github.com/Evolution-X/hardware_interfaces
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5c604b9a73
healthd receives power supply information as uevents and holds a wakelock while receiving these uevents. Without uevent filter, suspend is postponed indefinitely if a uevent is generated during suspend. Fix this by attaching a BPF program to the uevent socket that filters out all events that are not power supply events. This CL replaces the following CLs: * Lianwei Wang, healthd: Don't set all eventpoll wakeup-able, 2015-07-09 (https://android-review.googlesource.com/c/platform/system/core/+/158851). * Stephane Lee, Add BPF filter to filter uevents for SUBSYSTEM=powersupply, 2022-05-06. Multiple ideas and some code in this CL have been borrowed from Stephane Lee's CL. Bug: 139203596 Bug: 140330870 Bug: 203131934 Bug: 203229817 Bug: 203462310 Bug: 221725014 Test: Verified that a Pixel 2024 still wakes up if a USB cable is connected or disconnected. Test: Verified that suspend and resume still works for a Pixel 2024 device. Test: Verified that the following text appears in the Cuttlefish logcat output: "HealthLoop: Successfully attached BPF program to uevent socket" Test: Verified as follows that recovery mode works fine with Cuttlefish: adb reboot recovery && adb root && adb shell dmesg | grep -E 'F DEBUG|HealthLoop' Change-Id: I64446b103d660d220880461bdef7ef0f531e1734 Signed-off-by: Bart Van Assche <bvanassche@google.com>
84 lines
2.4 KiB
Plaintext
84 lines
2.4 KiB
Plaintext
// Copyright (C) 2019 The Android Open Source Project
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package {
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// See: http://go/android-license-faq
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// A large-scale-change added 'default_applicable_licenses' to import
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// all of the 'license_kinds' from "hardware_interfaces_license"
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// to get the below license kinds:
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// SPDX-license-identifier-Apache-2.0
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default_applicable_licenses: ["hardware_interfaces_license"],
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}
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bpf {
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name: "filterPowerSupplyEvents.o",
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srcs: ["filterPowerSupplyEvents.c"],
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// "vendor: true" because all binaries that use this BPF filter are vendor
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// binaries.
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vendor: true,
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}
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// Since "required" sections are ignored in static library definitions,
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// filterPowerSupplyEvents.o has been added in
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// build/make/target/product/base_vendor.mk.
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cc_library_static {
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name: "libhealthloop",
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vendor_available: true,
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recovery_available: true,
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srcs: [
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"HealthLoop.cpp",
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"utils.cpp",
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],
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shared_libs: [
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"libbase",
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"libcutils",
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],
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header_libs: [
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"bpf_headers",
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"libbatteryservice_headers",
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"libhealthd_headers",
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"libutils_headers",
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],
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export_include_dirs: [
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"include",
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],
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}
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genrule {
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name: "filterPowerSupplyEvents.h",
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out: ["filterPowerSupplyEvents.h"],
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srcs: [":filterPowerSupplyEvents.o"],
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cmd: "cat $(in) | od -v -tx1 | cut -c9- | grep -v '^$$' | sed 's/^/0x/;s/ /, 0x/g;s/^, //;s/$$/,/' > $(out)",
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}
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cc_test_host {
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name: "filterPowerSupplyEventsTest",
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team: "trendy_team_pixel_system_sw_storage",
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srcs: [
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"filterPowerSupplyEventsTest.cpp",
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],
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shared_libs: [
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"libbase",
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"libbpf",
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],
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static_libs: [
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"libgmock",
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],
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generated_headers: [
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"filterPowerSupplyEvents.h",
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"libbpf_headers",
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],
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compile_multilib: "64",
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}
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