Todd Poynor | 752faf2 | 2013-06-12 13:25:59 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2013 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #define LOG_TAG "healthd" |
| 18 | #define KLOG_LEVEL 6 |
| 19 | |
Todd Poynor | 10b235e | 2013-08-07 15:25:14 -0700 | [diff] [blame] | 20 | #include "healthd.h" |
Todd Poynor | 752faf2 | 2013-06-12 13:25:59 -0700 | [diff] [blame] | 21 | #include "BatteryMonitor.h" |
| 22 | |
| 23 | #include <errno.h> |
| 24 | #include <stdio.h> |
| 25 | #include <stdlib.h> |
| 26 | #include <unistd.h> |
| 27 | #include <batteryservice/BatteryService.h> |
| 28 | #include <binder/IPCThreadState.h> |
| 29 | #include <binder/ProcessState.h> |
| 30 | #include <cutils/klog.h> |
| 31 | #include <cutils/uevent.h> |
| 32 | #include <sys/epoll.h> |
| 33 | #include <sys/timerfd.h> |
| 34 | |
| 35 | using namespace android; |
| 36 | |
| 37 | // Periodic chores intervals in seconds |
Todd Poynor | 10b235e | 2013-08-07 15:25:14 -0700 | [diff] [blame] | 38 | #define DEFAULT_PERIODIC_CHORES_INTERVAL_FAST (60 * 1) |
| 39 | #define DEFAULT_PERIODIC_CHORES_INTERVAL_SLOW (60 * 10) |
Todd Poynor | 9face5c | 2013-08-08 12:24:53 -0700 | [diff] [blame^] | 40 | |
| 41 | static struct healthd_config healthd_config = { |
| 42 | .periodic_chores_interval_fast = DEFAULT_PERIODIC_CHORES_INTERVAL_FAST, |
| 43 | .periodic_chores_interval_slow = DEFAULT_PERIODIC_CHORES_INTERVAL_SLOW, |
| 44 | }; |
Todd Poynor | 752faf2 | 2013-06-12 13:25:59 -0700 | [diff] [blame] | 45 | |
| 46 | #define POWER_SUPPLY_SUBSYSTEM "power_supply" |
| 47 | |
| 48 | // epoll events: uevent, wakealarm, binder |
| 49 | #define MAX_EPOLL_EVENTS 3 |
| 50 | static int uevent_fd; |
| 51 | static int wakealarm_fd; |
| 52 | static int binder_fd; |
| 53 | |
| 54 | // -1 for no epoll timeout |
| 55 | static int awake_poll_interval = -1; |
| 56 | |
Todd Poynor | 10b235e | 2013-08-07 15:25:14 -0700 | [diff] [blame] | 57 | static int wakealarm_wake_interval = DEFAULT_PERIODIC_CHORES_INTERVAL_FAST; |
Todd Poynor | 752faf2 | 2013-06-12 13:25:59 -0700 | [diff] [blame] | 58 | |
| 59 | static BatteryMonitor* gBatteryMonitor; |
| 60 | |
| 61 | static bool nosvcmgr; |
| 62 | |
| 63 | static void wakealarm_set_interval(int interval) { |
| 64 | struct itimerspec itval; |
| 65 | |
| 66 | if (wakealarm_fd == -1) |
| 67 | return; |
| 68 | |
| 69 | wakealarm_wake_interval = interval; |
Todd Poynor | 10b235e | 2013-08-07 15:25:14 -0700 | [diff] [blame] | 70 | |
| 71 | if (interval == -1) |
| 72 | interval = 0; |
| 73 | |
Todd Poynor | 752faf2 | 2013-06-12 13:25:59 -0700 | [diff] [blame] | 74 | itval.it_interval.tv_sec = interval; |
| 75 | itval.it_interval.tv_nsec = 0; |
| 76 | itval.it_value.tv_sec = interval; |
| 77 | itval.it_value.tv_nsec = 0; |
| 78 | |
| 79 | if (timerfd_settime(wakealarm_fd, 0, &itval, NULL) == -1) |
| 80 | KLOG_ERROR(LOG_TAG, "wakealarm_set_interval: timerfd_settime failed\n"); |
| 81 | } |
| 82 | |
| 83 | static void battery_update(void) { |
| 84 | // Fast wake interval when on charger (watch for overheat); |
| 85 | // slow wake interval when on battery (watch for drained battery). |
| 86 | |
| 87 | int new_wake_interval = gBatteryMonitor->update() ? |
Todd Poynor | 9face5c | 2013-08-08 12:24:53 -0700 | [diff] [blame^] | 88 | healthd_config.periodic_chores_interval_fast : |
| 89 | healthd_config.periodic_chores_interval_slow; |
Todd Poynor | 752faf2 | 2013-06-12 13:25:59 -0700 | [diff] [blame] | 90 | |
| 91 | if (new_wake_interval != wakealarm_wake_interval) |
| 92 | wakealarm_set_interval(new_wake_interval); |
| 93 | |
| 94 | // During awake periods poll at fast rate. If wake alarm is set at fast |
| 95 | // rate then just use the alarm; if wake alarm is set at slow rate then |
| 96 | // poll at fast rate while awake and let alarm wake up at slow rate when |
| 97 | // asleep. |
| 98 | |
Todd Poynor | 9face5c | 2013-08-08 12:24:53 -0700 | [diff] [blame^] | 99 | if (healthd_config.periodic_chores_interval_fast == -1) |
Todd Poynor | 10b235e | 2013-08-07 15:25:14 -0700 | [diff] [blame] | 100 | awake_poll_interval = -1; |
| 101 | else |
| 102 | awake_poll_interval = |
Todd Poynor | 9face5c | 2013-08-08 12:24:53 -0700 | [diff] [blame^] | 103 | new_wake_interval == healthd_config.periodic_chores_interval_fast ? |
| 104 | -1 : healthd_config.periodic_chores_interval_fast * 1000; |
Todd Poynor | 752faf2 | 2013-06-12 13:25:59 -0700 | [diff] [blame] | 105 | } |
| 106 | |
| 107 | static void periodic_chores() { |
| 108 | battery_update(); |
| 109 | } |
| 110 | |
| 111 | static void uevent_init(void) { |
| 112 | uevent_fd = uevent_open_socket(64*1024, true); |
| 113 | |
| 114 | if (uevent_fd >= 0) |
| 115 | fcntl(uevent_fd, F_SETFL, O_NONBLOCK); |
| 116 | else |
| 117 | KLOG_ERROR(LOG_TAG, "uevent_init: uevent_open_socket failed\n"); |
| 118 | } |
| 119 | |
| 120 | #define UEVENT_MSG_LEN 1024 |
| 121 | static void uevent_event(void) { |
| 122 | char msg[UEVENT_MSG_LEN+2]; |
| 123 | char *cp; |
| 124 | int n; |
| 125 | |
| 126 | n = uevent_kernel_multicast_recv(uevent_fd, msg, UEVENT_MSG_LEN); |
| 127 | if (n <= 0) |
| 128 | return; |
| 129 | if (n >= UEVENT_MSG_LEN) /* overflow -- discard */ |
| 130 | return; |
| 131 | |
| 132 | msg[n] = '\0'; |
| 133 | msg[n+1] = '\0'; |
| 134 | cp = msg; |
| 135 | |
| 136 | while (*cp) { |
| 137 | if (!strcmp(cp, "SUBSYSTEM=" POWER_SUPPLY_SUBSYSTEM)) { |
| 138 | battery_update(); |
| 139 | break; |
| 140 | } |
| 141 | |
| 142 | /* advance to after the next \0 */ |
| 143 | while (*cp++) |
| 144 | ; |
| 145 | } |
| 146 | } |
| 147 | |
| 148 | static void wakealarm_init(void) { |
| 149 | wakealarm_fd = timerfd_create(CLOCK_BOOTTIME_ALARM, TFD_NONBLOCK); |
| 150 | if (wakealarm_fd == -1) { |
| 151 | KLOG_ERROR(LOG_TAG, "wakealarm_init: timerfd_create failed\n"); |
| 152 | return; |
| 153 | } |
| 154 | |
Todd Poynor | 9face5c | 2013-08-08 12:24:53 -0700 | [diff] [blame^] | 155 | wakealarm_set_interval(healthd_config.periodic_chores_interval_fast); |
Todd Poynor | 752faf2 | 2013-06-12 13:25:59 -0700 | [diff] [blame] | 156 | } |
| 157 | |
| 158 | static void wakealarm_event(void) { |
| 159 | unsigned long long wakeups; |
| 160 | |
| 161 | if (read(wakealarm_fd, &wakeups, sizeof(wakeups)) == -1) { |
| 162 | KLOG_ERROR(LOG_TAG, "wakealarm_event: read wakealarm_fd failed\n"); |
| 163 | return; |
| 164 | } |
| 165 | |
| 166 | periodic_chores(); |
| 167 | } |
| 168 | |
| 169 | static void binder_init(void) { |
| 170 | ProcessState::self()->setThreadPoolMaxThreadCount(0); |
| 171 | IPCThreadState::self()->disableBackgroundScheduling(true); |
| 172 | IPCThreadState::self()->setupPolling(&binder_fd); |
| 173 | } |
| 174 | |
| 175 | static void binder_event(void) { |
| 176 | IPCThreadState::self()->handlePolledCommands(); |
| 177 | } |
| 178 | |
| 179 | static void healthd_mainloop(void) { |
| 180 | struct epoll_event ev; |
| 181 | int epollfd; |
| 182 | int maxevents = 0; |
| 183 | |
| 184 | epollfd = epoll_create(MAX_EPOLL_EVENTS); |
| 185 | if (epollfd == -1) { |
| 186 | KLOG_ERROR(LOG_TAG, |
| 187 | "healthd_mainloop: epoll_create failed; errno=%d\n", |
| 188 | errno); |
| 189 | return; |
| 190 | } |
| 191 | |
| 192 | if (uevent_fd >= 0) { |
| 193 | ev.events = EPOLLIN | EPOLLWAKEUP; |
| 194 | ev.data.ptr = (void *)uevent_event; |
| 195 | if (epoll_ctl(epollfd, EPOLL_CTL_ADD, uevent_fd, &ev) == -1) |
| 196 | KLOG_ERROR(LOG_TAG, |
| 197 | "healthd_mainloop: epoll_ctl for uevent_fd failed; errno=%d\n", |
| 198 | errno); |
| 199 | else |
| 200 | maxevents++; |
| 201 | } |
| 202 | |
| 203 | if (wakealarm_fd >= 0) { |
| 204 | ev.events = EPOLLIN | EPOLLWAKEUP; |
| 205 | ev.data.ptr = (void *)wakealarm_event; |
| 206 | if (epoll_ctl(epollfd, EPOLL_CTL_ADD, wakealarm_fd, &ev) == -1) |
| 207 | KLOG_ERROR(LOG_TAG, |
| 208 | "healthd_mainloop: epoll_ctl for wakealarm_fd failed; errno=%d\n", |
| 209 | errno); |
| 210 | else |
| 211 | maxevents++; |
| 212 | } |
| 213 | |
| 214 | if (binder_fd >= 0) { |
| 215 | ev.events = EPOLLIN | EPOLLWAKEUP; |
| 216 | ev.data.ptr= (void *)binder_event; |
| 217 | if (epoll_ctl(epollfd, EPOLL_CTL_ADD, binder_fd, &ev) == -1) |
| 218 | KLOG_ERROR(LOG_TAG, |
| 219 | "healthd_mainloop: epoll_ctl for binder_fd failed; errno=%d\n", |
| 220 | errno); |
| 221 | else |
| 222 | maxevents++; |
| 223 | } |
| 224 | |
| 225 | while (1) { |
| 226 | struct epoll_event events[maxevents]; |
| 227 | int nevents; |
| 228 | |
| 229 | IPCThreadState::self()->flushCommands(); |
| 230 | nevents = epoll_wait(epollfd, events, maxevents, awake_poll_interval); |
| 231 | |
| 232 | if (nevents == -1) { |
| 233 | if (errno == EINTR) |
| 234 | continue; |
| 235 | KLOG_ERROR(LOG_TAG, "healthd_mainloop: epoll_wait failed\n"); |
| 236 | break; |
| 237 | } |
| 238 | |
| 239 | for (int n = 0; n < nevents; ++n) { |
| 240 | if (events[n].data.ptr) |
| 241 | (*(void (*)())events[n].data.ptr)(); |
| 242 | } |
| 243 | } |
| 244 | |
| 245 | return; |
| 246 | } |
| 247 | |
| 248 | int main(int argc, char **argv) { |
| 249 | int ch; |
| 250 | |
| 251 | klog_set_level(KLOG_LEVEL); |
| 252 | |
| 253 | while ((ch = getopt(argc, argv, "n")) != -1) { |
| 254 | switch (ch) { |
| 255 | case 'n': |
| 256 | nosvcmgr = true; |
| 257 | break; |
| 258 | case '?': |
| 259 | default: |
| 260 | KLOG_WARNING(LOG_TAG, "Unrecognized healthd option: %c\n", ch); |
| 261 | } |
| 262 | } |
| 263 | |
Todd Poynor | 9face5c | 2013-08-08 12:24:53 -0700 | [diff] [blame^] | 264 | healthd_board_init(&healthd_config); |
Todd Poynor | 752faf2 | 2013-06-12 13:25:59 -0700 | [diff] [blame] | 265 | wakealarm_init(); |
| 266 | uevent_init(); |
| 267 | binder_init(); |
| 268 | gBatteryMonitor = new BatteryMonitor(); |
| 269 | gBatteryMonitor->init(nosvcmgr); |
| 270 | |
| 271 | healthd_mainloop(); |
| 272 | return 0; |
| 273 | } |