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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "storaged"
#include <stdint.h>
#include <time.h>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <android/content/pm/IPackageManagerNative.h>
#include <android-base/file.h>
#include <android-base/logging.h>
#include <android-base/macros.h>
#include <android-base/parseint.h>
#include <android-base/strings.h>
#include <android-base/stringprintf.h>
#include <binder/IServiceManager.h>
#include <log/log_event_list.h>
#include "storaged.h"
#include "storaged_uid_monitor.h"
using namespace android;
using namespace android::base;
using namespace android::content::pm;
using namespace android::os::storaged;
using namespace storaged_proto;
namespace {
bool refresh_uid_names;
const char* UID_IO_STATS_PATH = "/proc/uid_io/stats";
} // namepsace
std::unordered_map<uint32_t, uid_info> uid_monitor::get_uid_io_stats()
{
Mutex::Autolock _l(uidm_mutex_);
return get_uid_io_stats_locked();
};
/* return true on parse success and false on failure */
bool uid_info::parse_uid_io_stats(std::string&& s)
{
std::vector<std::string> fields = Split(s, " ");
if (fields.size() < 11 ||
!ParseUint(fields[0], &uid) ||
!ParseUint(fields[1], &io[FOREGROUND].rchar) ||
!ParseUint(fields[2], &io[FOREGROUND].wchar) ||
!ParseUint(fields[3], &io[FOREGROUND].read_bytes) ||
!ParseUint(fields[4], &io[FOREGROUND].write_bytes) ||
!ParseUint(fields[5], &io[BACKGROUND].rchar) ||
!ParseUint(fields[6], &io[BACKGROUND].wchar) ||
!ParseUint(fields[7], &io[BACKGROUND].read_bytes) ||
!ParseUint(fields[8], &io[BACKGROUND].write_bytes) ||
!ParseUint(fields[9], &io[FOREGROUND].fsync) ||
!ParseUint(fields[10], &io[BACKGROUND].fsync)) {
LOG(WARNING) << "Invalid uid I/O stats: \"" << s << "\"";
return false;
}
return true;
}
/* return true on parse success and false on failure */
bool task_info::parse_task_io_stats(std::string&& s)
{
std::vector<std::string> fields = Split(s, ",");
size_t size = fields.size();
if (size < 13 ||
!ParseInt(fields[size - 11], &pid) ||
!ParseUint(fields[size - 10], &io[FOREGROUND].rchar) ||
!ParseUint(fields[size - 9], &io[FOREGROUND].wchar) ||
!ParseUint(fields[size - 8], &io[FOREGROUND].read_bytes) ||
!ParseUint(fields[size - 7], &io[FOREGROUND].write_bytes) ||
!ParseUint(fields[size - 6], &io[BACKGROUND].rchar) ||
!ParseUint(fields[size - 5], &io[BACKGROUND].wchar) ||
!ParseUint(fields[size - 4], &io[BACKGROUND].read_bytes) ||
!ParseUint(fields[size - 3], &io[BACKGROUND].write_bytes) ||
!ParseUint(fields[size - 2], &io[FOREGROUND].fsync) ||
!ParseUint(fields[size - 1], &io[BACKGROUND].fsync)) {
LOG(WARNING) << "Invalid task I/O stats: \"" << s << "\"";
return false;
}
comm = Join(std::vector<std::string>(
fields.begin() + 1, fields.end() - 11), ',');
return true;
}
bool io_usage::is_zero() const
{
for (int i = 0; i < IO_TYPES; i++) {
for (int j = 0; j < UID_STATS; j++) {
for (int k = 0; k < CHARGER_STATS; k++) {
if (bytes[i][j][k])
return false;
}
}
}
return true;
}
namespace {
void get_uid_names(const vector<int>& uids, const vector<std::string*>& uid_names)
{
sp<IServiceManager> sm = defaultServiceManager();
if (sm == NULL) {
LOG(ERROR) << "defaultServiceManager failed";
return;
}
sp<IBinder> binder = sm->getService(String16("package_native"));
if (binder == NULL) {
LOG(ERROR) << "getService package_native failed";
return;
}
sp<IPackageManagerNative> package_mgr = interface_cast<IPackageManagerNative>(binder);
std::vector<std::string> names;
binder::Status status = package_mgr->getNamesForUids(uids, &names);
if (!status.isOk()) {
LOG(ERROR) << "package_native::getNamesForUids failed: " << status.exceptionMessage();
return;
}
for (uint32_t i = 0; i < uid_names.size(); i++) {
if (!names[i].empty()) {
*uid_names[i] = names[i];
}
}
refresh_uid_names = false;
}
} // namespace
std::unordered_map<uint32_t, uid_info> uid_monitor::get_uid_io_stats_locked()
{
std::unordered_map<uint32_t, uid_info> uid_io_stats;
std::string buffer;
if (!ReadFileToString(UID_IO_STATS_PATH, &buffer)) {
PLOG(ERROR) << UID_IO_STATS_PATH << ": ReadFileToString failed";
return uid_io_stats;
}
std::vector<std::string> io_stats = Split(std::move(buffer), "\n");
uid_info u;
vector<int> uids;
vector<std::string*> uid_names;
for (uint32_t i = 0; i < io_stats.size(); i++) {
if (io_stats[i].empty()) {
continue;
}
if (io_stats[i].compare(0, 4, "task")) {
if (!u.parse_uid_io_stats(std::move(io_stats[i])))
continue;
uid_io_stats[u.uid] = u;
uid_io_stats[u.uid].name = std::to_string(u.uid);
uids.push_back(u.uid);
uid_names.push_back(&uid_io_stats[u.uid].name);
if (last_uid_io_stats_.find(u.uid) == last_uid_io_stats_.end()) {
refresh_uid_names = true;
} else {
uid_io_stats[u.uid].name = last_uid_io_stats_[u.uid].name;
}
} else {
task_info t;
if (!t.parse_task_io_stats(std::move(io_stats[i])))
continue;
uid_io_stats[u.uid].tasks[t.pid] = t;
}
}
if (!uids.empty() && refresh_uid_names) {
get_uid_names(uids, uid_names);
}
return uid_io_stats;
}
namespace {
inline size_t history_size(
const std::map<uint64_t, struct uid_records>& history)
{
size_t count = 0;
for (auto const& it : history) {
count += it.second.entries.size();
}
return count;
}
} // namespace
void uid_monitor::add_records_locked(uint64_t curr_ts)
{
// remove records more than 5 days old
if (curr_ts > 5 * DAY_TO_SEC) {
auto it = io_history_.lower_bound(curr_ts - 5 * DAY_TO_SEC);
io_history_.erase(io_history_.begin(), it);
}
struct uid_records new_records;
for (const auto& p : curr_io_stats_) {
struct uid_record record = {};
record.name = p.first;
if (!p.second.uid_ios.is_zero()) {
record.ios.user_id = p.second.user_id;
record.ios.uid_ios = p.second.uid_ios;
for (const auto& p_task : p.second.task_ios) {
if (!p_task.second.is_zero())
record.ios.task_ios[p_task.first] = p_task.second;
}
new_records.entries.push_back(record);
}
}
curr_io_stats_.clear();
new_records.start_ts = start_ts_;
start_ts_ = curr_ts;
if (new_records.entries.empty())
return;
// make some room for new records
maybe_shrink_history_for_items(new_records.entries.size());
io_history_[curr_ts] = new_records;
}
void uid_monitor::maybe_shrink_history_for_items(size_t nitems) {
ssize_t overflow = history_size(io_history_) + nitems - MAX_UID_RECORDS_SIZE;
while (overflow > 0 && io_history_.size() > 0) {
auto del_it = io_history_.begin();
overflow -= del_it->second.entries.size();
io_history_.erase(io_history_.begin());
}
}
std::map<uint64_t, struct uid_records> uid_monitor::dump(
double hours, uint64_t threshold, bool force_report)
{
if (force_report) {
report(nullptr);
}
Mutex::Autolock _l(uidm_mutex_);
std::map<uint64_t, struct uid_records> dump_records;
uint64_t first_ts = 0;
if (hours != 0) {
first_ts = time(NULL) - hours * HOUR_TO_SEC;
}
for (auto it = io_history_.lower_bound(first_ts); it != io_history_.end(); ++it) {
const std::vector<struct uid_record>& recs = it->second.entries;
struct uid_records filtered;
for (const auto& rec : recs) {
const io_usage& uid_usage = rec.ios.uid_ios;
if (uid_usage.bytes[READ][FOREGROUND][CHARGER_ON] +
uid_usage.bytes[READ][FOREGROUND][CHARGER_OFF] +
uid_usage.bytes[READ][BACKGROUND][CHARGER_ON] +
uid_usage.bytes[READ][BACKGROUND][CHARGER_OFF] +
uid_usage.bytes[WRITE][FOREGROUND][CHARGER_ON] +
uid_usage.bytes[WRITE][FOREGROUND][CHARGER_OFF] +
uid_usage.bytes[WRITE][BACKGROUND][CHARGER_ON] +
uid_usage.bytes[WRITE][BACKGROUND][CHARGER_OFF] > threshold) {
filtered.entries.push_back(rec);
}
}
if (filtered.entries.empty())
continue;
filtered.start_ts = it->second.start_ts;
dump_records.insert(
std::pair<uint64_t, struct uid_records>(it->first, filtered));
}
return dump_records;
}
void uid_monitor::update_curr_io_stats_locked()
{
std::unordered_map<uint32_t, uid_info> uid_io_stats =
get_uid_io_stats_locked();
if (uid_io_stats.empty()) {
return;
}
for (const auto& it : uid_io_stats) {
const uid_info& uid = it.second;
if (curr_io_stats_.find(uid.name) == curr_io_stats_.end()) {
curr_io_stats_[uid.name] = {};
}
struct uid_io_usage& usage = curr_io_stats_[uid.name];
usage.user_id = multiuser_get_user_id(uid.uid);
int64_t fg_rd_delta = uid.io[FOREGROUND].read_bytes -
last_uid_io_stats_[uid.uid].io[FOREGROUND].read_bytes;
int64_t bg_rd_delta = uid.io[BACKGROUND].read_bytes -
last_uid_io_stats_[uid.uid].io[BACKGROUND].read_bytes;
int64_t fg_wr_delta = uid.io[FOREGROUND].write_bytes -
last_uid_io_stats_[uid.uid].io[FOREGROUND].write_bytes;
int64_t bg_wr_delta = uid.io[BACKGROUND].write_bytes -
last_uid_io_stats_[uid.uid].io[BACKGROUND].write_bytes;
usage.uid_ios.bytes[READ][FOREGROUND][charger_stat_] +=
(fg_rd_delta < 0) ? 0 : fg_rd_delta;
usage.uid_ios.bytes[READ][BACKGROUND][charger_stat_] +=
(bg_rd_delta < 0) ? 0 : bg_rd_delta;
usage.uid_ios.bytes[WRITE][FOREGROUND][charger_stat_] +=
(fg_wr_delta < 0) ? 0 : fg_wr_delta;
usage.uid_ios.bytes[WRITE][BACKGROUND][charger_stat_] +=
(bg_wr_delta < 0) ? 0 : bg_wr_delta;
for (const auto& task_it : uid.tasks) {
const task_info& task = task_it.second;
const pid_t pid = task_it.first;
const std::string& comm = task_it.second.comm;
int64_t task_fg_rd_delta = task.io[FOREGROUND].read_bytes -
last_uid_io_stats_[uid.uid].tasks[pid].io[FOREGROUND].read_bytes;
int64_t task_bg_rd_delta = task.io[BACKGROUND].read_bytes -
last_uid_io_stats_[uid.uid].tasks[pid].io[BACKGROUND].read_bytes;
int64_t task_fg_wr_delta = task.io[FOREGROUND].write_bytes -
last_uid_io_stats_[uid.uid].tasks[pid].io[FOREGROUND].write_bytes;
int64_t task_bg_wr_delta = task.io[BACKGROUND].write_bytes -
last_uid_io_stats_[uid.uid].tasks[pid].io[BACKGROUND].write_bytes;
io_usage& task_usage = usage.task_ios[comm];
task_usage.bytes[READ][FOREGROUND][charger_stat_] +=
(task_fg_rd_delta < 0) ? 0 : task_fg_rd_delta;
task_usage.bytes[READ][BACKGROUND][charger_stat_] +=
(task_bg_rd_delta < 0) ? 0 : task_bg_rd_delta;
task_usage.bytes[WRITE][FOREGROUND][charger_stat_] +=
(task_fg_wr_delta < 0) ? 0 : task_fg_wr_delta;
task_usage.bytes[WRITE][BACKGROUND][charger_stat_] +=
(task_bg_wr_delta < 0) ? 0 : task_bg_wr_delta;
}
}
last_uid_io_stats_ = uid_io_stats;
}
void uid_monitor::report(unordered_map<int, StoragedProto>* protos)
{
if (!enabled()) return;
Mutex::Autolock _l(uidm_mutex_);
update_curr_io_stats_locked();
add_records_locked(time(NULL));
if (protos) {
update_uid_io_proto(protos);
}
}
namespace {
void set_io_usage_proto(IOUsage* usage_proto, const io_usage& usage)
{
usage_proto->set_rd_fg_chg_on(usage.bytes[READ][FOREGROUND][CHARGER_ON]);
usage_proto->set_rd_fg_chg_off(usage.bytes[READ][FOREGROUND][CHARGER_OFF]);
usage_proto->set_rd_bg_chg_on(usage.bytes[READ][BACKGROUND][CHARGER_ON]);
usage_proto->set_rd_bg_chg_off(usage.bytes[READ][BACKGROUND][CHARGER_OFF]);
usage_proto->set_wr_fg_chg_on(usage.bytes[WRITE][FOREGROUND][CHARGER_ON]);
usage_proto->set_wr_fg_chg_off(usage.bytes[WRITE][FOREGROUND][CHARGER_OFF]);
usage_proto->set_wr_bg_chg_on(usage.bytes[WRITE][BACKGROUND][CHARGER_ON]);
usage_proto->set_wr_bg_chg_off(usage.bytes[WRITE][BACKGROUND][CHARGER_OFF]);
}
void get_io_usage_proto(io_usage* usage, const IOUsage& io_proto)
{
usage->bytes[READ][FOREGROUND][CHARGER_ON] = io_proto.rd_fg_chg_on();
usage->bytes[READ][FOREGROUND][CHARGER_OFF] = io_proto.rd_fg_chg_off();
usage->bytes[READ][BACKGROUND][CHARGER_ON] = io_proto.rd_bg_chg_on();
usage->bytes[READ][BACKGROUND][CHARGER_OFF] = io_proto.rd_bg_chg_off();
usage->bytes[WRITE][FOREGROUND][CHARGER_ON] = io_proto.wr_fg_chg_on();
usage->bytes[WRITE][FOREGROUND][CHARGER_OFF] = io_proto.wr_fg_chg_off();
usage->bytes[WRITE][BACKGROUND][CHARGER_ON] = io_proto.wr_bg_chg_on();
usage->bytes[WRITE][BACKGROUND][CHARGER_OFF] = io_proto.wr_bg_chg_off();
}
} // namespace
void uid_monitor::update_uid_io_proto(unordered_map<int, StoragedProto>* protos)
{
for (const auto& item : io_history_) {
const uint64_t& end_ts = item.first;
const struct uid_records& recs = item.second;
unordered_map<userid_t, UidIOItem*> user_items;
for (const auto& entry : recs.entries) {
userid_t user_id = entry.ios.user_id;
UidIOItem* item_proto = user_items[user_id];
if (item_proto == nullptr) {
item_proto = (*protos)[user_id].mutable_uid_io_usage()
->add_uid_io_items();
user_items[user_id] = item_proto;
}
item_proto->set_end_ts(end_ts);
UidIORecords* recs_proto = item_proto->mutable_records();
recs_proto->set_start_ts(recs.start_ts);
UidRecord* rec_proto = recs_proto->add_entries();
rec_proto->set_uid_name(entry.name);
rec_proto->set_user_id(user_id);
IOUsage* uid_io_proto = rec_proto->mutable_uid_io();
const io_usage& uio_ios = entry.ios.uid_ios;
set_io_usage_proto(uid_io_proto, uio_ios);
for (const auto& task_io : entry.ios.task_ios) {
const std::string& task_name = task_io.first;
const io_usage& task_ios = task_io.second;
TaskIOUsage* task_io_proto = rec_proto->add_task_io();
task_io_proto->set_task_name(task_name);
set_io_usage_proto(task_io_proto->mutable_ios(), task_ios);
}
}
}
}
void uid_monitor::clear_user_history(userid_t user_id)
{
Mutex::Autolock _l(uidm_mutex_);
for (auto& item : io_history_) {
vector<uid_record>* entries = &item.second.entries;
entries->erase(
remove_if(entries->begin(), entries->end(),
[user_id](const uid_record& rec) {
return rec.ios.user_id == user_id;}),
entries->end());
}
for (auto it = io_history_.begin(); it != io_history_.end(); ) {
if (it->second.entries.empty()) {
it = io_history_.erase(it);
} else {
it++;
}
}
}
void uid_monitor::load_uid_io_proto(userid_t user_id, const UidIOUsage& uid_io_proto)
{
if (!enabled()) return;
Mutex::Autolock _l(uidm_mutex_);
for (const auto& item_proto : uid_io_proto.uid_io_items()) {
const UidIORecords& records_proto = item_proto.records();
struct uid_records* recs = &io_history_[item_proto.end_ts()];
// It's possible that the same uid_io_proto file gets loaded more than
// once, for example, if system_server crashes. In this case we avoid
// adding duplicate entries, so we build a quick way to check for
// duplicates.
std::unordered_set<std::string> existing_uids;
for (const auto& rec : recs->entries) {
if (rec.ios.user_id == user_id) {
existing_uids.emplace(rec.name);
}
}
recs->start_ts = records_proto.start_ts();
for (const auto& rec_proto : records_proto.entries()) {
if (existing_uids.find(rec_proto.uid_name()) != existing_uids.end()) {
continue;
}
struct uid_record record;
record.name = rec_proto.uid_name();
record.ios.user_id = rec_proto.user_id();
get_io_usage_proto(&record.ios.uid_ios, rec_proto.uid_io());
for (const auto& task_io_proto : rec_proto.task_io()) {
get_io_usage_proto(
&record.ios.task_ios[task_io_proto.task_name()],
task_io_proto.ios());
}
recs->entries.push_back(record);
}
// We already added items, so this will just cull down to the maximum
// length. We do not remove anything if there is only one entry.
if (io_history_.size() > 1) {
maybe_shrink_history_for_items(0);
}
}
}
void uid_monitor::set_charger_state(charger_stat_t stat)
{
Mutex::Autolock _l(uidm_mutex_);
if (charger_stat_ == stat) {
return;
}
update_curr_io_stats_locked();
charger_stat_ = stat;
}
void uid_monitor::init(charger_stat_t stat)
{
charger_stat_ = stat;
start_ts_ = time(NULL);
last_uid_io_stats_ = get_uid_io_stats();
}
uid_monitor::uid_monitor()
: enabled_(!access(UID_IO_STATS_PATH, R_OK)) {
}