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Merge "init: Reboot after timeout passes during reboot"

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Tom Cherry 2018-02-26 17:41:11 +00:00 committed by Gerrit Code Review
commit 89063827b1
1 changed files with 77 additions and 36 deletions
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113
init/reboot.cpp
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@ -20,6 +20,7 @@
#include <fcntl.h>
#include <linux/fs.h>
#include <mntent.h>
#include <semaphore.h>
#include <sys/capability.h>
#include <sys/cdefs.h>
#include <sys/ioctl.h>
@ -89,12 +90,13 @@ class MountEntry {
mnt_opts_(entry.mnt_opts) {}
bool Umount(bool force) {
LOG(INFO) << "Unmounting " << mnt_fsname_ << ":" << mnt_dir_ << " opts " << mnt_opts_;
int r = umount2(mnt_dir_.c_str(), force ? MNT_FORCE : 0);
if (r == 0) {
LOG(INFO) << "umounted " << mnt_fsname_ << ":" << mnt_dir_ << " opts " << mnt_opts_;
LOG(INFO) << "Umounted " << mnt_fsname_ << ":" << mnt_dir_ << " opts " << mnt_opts_;
return true;
} else {
PLOG(WARNING) << "cannot umount " << mnt_fsname_ << ":" << mnt_dir_ << " opts "
PLOG(WARNING) << "Cannot umount " << mnt_fsname_ << ":" << mnt_dir_ << " opts "
<< mnt_opts_;
return false;
}
@ -328,39 +330,9 @@ static UmountStat TryUmountAndFsck(bool runFsck, std::chrono::milliseconds timeo
return stat;
}
void DoReboot(unsigned int cmd, const std::string& reason, const std::string& rebootTarget,
bool runFsck) {
void RebootThread(unsigned int cmd, std::chrono::milliseconds shutdown_timeout, bool runFsck,
sem_t* reboot_semaphore) {
Timer t;
LOG(INFO) << "Reboot start, reason: " << reason << ", rebootTarget: " << rebootTarget;
// Ensure last reboot reason is reduced to canonical
// alias reported in bootloader or system boot reason.
size_t skip = 0;
std::vector<std::string> reasons = Split(reason, ",");
if (reasons.size() >= 2 && reasons[0] == "reboot" &&
(reasons[1] == "recovery" || reasons[1] == "bootloader" || reasons[1] == "cold" ||
reasons[1] == "hard" || reasons[1] == "warm")) {
skip = strlen("reboot,");
}
property_set(LAST_REBOOT_REASON_PROPERTY, reason.c_str() + skip);
sync();
bool is_thermal_shutdown = cmd == ANDROID_RB_THERMOFF;
auto shutdown_timeout = 0ms;
if (!SHUTDOWN_ZERO_TIMEOUT) {
if (is_thermal_shutdown) {
constexpr unsigned int thermal_shutdown_timeout = 1;
shutdown_timeout = std::chrono::seconds(thermal_shutdown_timeout);
} else {
constexpr unsigned int shutdown_timeout_default = 6;
auto shutdown_timeout_property = android::base::GetUintProperty(
"ro.build.shutdown_timeout", shutdown_timeout_default);
shutdown_timeout = std::chrono::seconds(shutdown_timeout_property);
}
}
LOG(INFO) << "Shutdown timeout: " << shutdown_timeout.count() << " ms";
// keep debugging tools until non critical ones are all gone.
const std::set<std::string> kill_after_apps{"tombstoned", "logd", "adbd"};
// watchdogd is a vendor specific component but should be alive to complete shutdown safely.
@ -384,7 +356,7 @@ void DoReboot(unsigned int cmd, const std::string& reason, const std::string& re
}
// remaining operations (specifically fsck) may take a substantial duration
if (cmd == ANDROID_RB_POWEROFF || is_thermal_shutdown) {
if (cmd == ANDROID_RB_POWEROFF || cmd == ANDROID_RB_THERMOFF) {
TurnOffBacklight();
}
@ -461,8 +433,77 @@ void DoReboot(unsigned int cmd, const std::string& reason, const std::string& re
UmountStat stat = TryUmountAndFsck(runFsck, shutdown_timeout - t.duration());
// Follow what linux shutdown is doing: one more sync with little bit delay
sync();
if (!is_thermal_shutdown) std::this_thread::sleep_for(100ms);
if (cmd != ANDROID_RB_THERMOFF) std::this_thread::sleep_for(100ms);
LogShutdownTime(stat, &t);
if (reboot_semaphore != nullptr) {
sem_post(reboot_semaphore);
}
}
void RunRebootThread(unsigned int cmd, std::chrono::milliseconds shutdown_timeout) {
sem_t reboot_semaphore;
timespec shutdown_timeout_timespec;
if (sem_init(&reboot_semaphore, false, 0) == -1 ||
clock_gettime(CLOCK_REALTIME, &shutdown_timeout_timespec) == -1) {
// These should never fail, but if they do, skip the graceful reboot and reboot immediately.
return;
}
std::thread reboot_thread(&RebootThread, cmd, shutdown_timeout, false, &reboot_semaphore);
reboot_thread.detach();
// One extra second than the timeout passed to the thread as there is a final Umount pass
// after the timeout is reached.
shutdown_timeout_timespec.tv_sec += 1 + shutdown_timeout.count() / 1000;
int sem_return = 0;
while ((sem_return = sem_timedwait(&reboot_semaphore, &shutdown_timeout_timespec)) == -1 &&
errno == EINTR) {
}
if (sem_return == -1) {
LOG(ERROR) << "Reboot thread timed out";
}
}
void DoReboot(unsigned int cmd, const std::string& reason, const std::string& rebootTarget,
bool runFsck) {
LOG(INFO) << "Reboot start, reason: " << reason << ", rebootTarget: " << rebootTarget;
// Ensure last reboot reason is reduced to canonical
// alias reported in bootloader or system boot reason.
size_t skip = 0;
std::vector<std::string> reasons = Split(reason, ",");
if (reasons.size() >= 2 && reasons[0] == "reboot" &&
(reasons[1] == "recovery" || reasons[1] == "bootloader" || reasons[1] == "cold" ||
reasons[1] == "hard" || reasons[1] == "warm")) {
skip = strlen("reboot,");
}
property_set(LAST_REBOOT_REASON_PROPERTY, reason.c_str() + skip);
sync();
auto shutdown_timeout = 0ms;
if (!SHUTDOWN_ZERO_TIMEOUT) {
if (cmd == ANDROID_RB_THERMOFF) {
constexpr auto kThermalShutdownTimeout = 1s;
shutdown_timeout = kThermalShutdownTimeout;
} else {
constexpr unsigned int kShutdownTimeoutDefault = 6;
auto shutdown_timeout_property = android::base::GetUintProperty(
"ro.build.shutdown_timeout", kShutdownTimeoutDefault);
shutdown_timeout = std::chrono::seconds(shutdown_timeout_property);
}
}
LOG(INFO) << "Shutdown timeout: " << shutdown_timeout.count() << " ms";
if (runFsck) {
RebootThread(cmd, shutdown_timeout, true, nullptr);
} else {
RunRebootThread(cmd, shutdown_timeout);
}
// Reboot regardless of umount status. If umount fails, fsck after reboot will fix it.
RebootSystem(cmd, rebootTarget);
abort();