1 /*
2 * Copyright (C) 2020 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 #include <android-base/logging.h>
18 #include <android-base/properties.h>
19 #include <android-base/strings.h>
20
21 #include <dataproviders/WlanStateResidencyDataProvider.h>
22
23 namespace aidl {
24 namespace android {
25 namespace hardware {
26 namespace power {
27 namespace stats {
28
29 enum {
30 ACTIVE_ID = 0,
31 DEEPSLEEP_ID = 1,
32 };
33
extractStat(const char * line,const std::string & prefix,uint64_t * stat)34 static bool extractStat(const char *line, const std::string &prefix, uint64_t *stat) {
35 char const *prefixStart = strstr(line, prefix.c_str());
36 if (prefixStart == nullptr) {
37 // Did not find the given prefix
38 return false;
39 }
40
41 *stat = strtoull(prefixStart + prefix.length(), nullptr, 0);
42 return true;
43 }
44
getStateResidencies(std::unordered_map<std::string,std::vector<StateResidency>> * residencies)45 bool WlanStateResidencyDataProvider::getStateResidencies(
46 std::unordered_map<std::string, std::vector<StateResidency>> *residencies) {
47 std::vector<StateResidency> result = {{.id = ACTIVE_ID}, {.id = DEEPSLEEP_ID}};
48
49 std::string wlanDriverStatus = ::android::base::GetProperty("wlan.driver.status", "unloaded");
50 if (wlanDriverStatus != "ok") {
51 LOG(ERROR) << ": wlan is " << wlanDriverStatus;
52 // Return 0s for Wlan stats, because the driver is unloaded
53 residencies->emplace(mName, result);
54 return true;
55 }
56
57 // Using FILE* instead of std::ifstream for performance reasons (b/122253123)
58 std::unique_ptr<FILE, decltype(&fclose)> fp(fopen(mPath.c_str(), "r"), fclose);
59 if (!fp) {
60 PLOG(ERROR) << ":Failed to open file " << mPath;
61 return false;
62 }
63 size_t numFieldsRead = 0;
64 const size_t numFields = 4;
65 size_t len = 0;
66 char *line = nullptr;
67
68 while ((numFieldsRead < numFields) && (getline(&line, &len, fp.get()) != -1)) {
69 uint64_t stat = 0;
70 if (extractStat(line, "cumulative_sleep_time_ms:", &stat)) {
71 result[1].totalTimeInStateMs = stat;
72 ++numFieldsRead;
73 } else if (extractStat(line, "cumulative_total_on_time_ms:", &stat)) {
74 result[0].totalTimeInStateMs = stat;
75 ++numFieldsRead;
76 } else if (extractStat(line, "deep_sleep_enter_counter:", &stat)) {
77 result[0].totalStateEntryCount = stat;
78 result[1].totalStateEntryCount = stat;
79 ++numFieldsRead;
80 } else if (extractStat(line, "last_deep_sleep_enter_tstamp_ms:", &stat)) {
81 result[1].lastEntryTimestampMs = stat;
82 ++numFieldsRead;
83 }
84 }
85
86 free(line);
87
88 // End of file was reached and not all state data was parsed. Something
89 // went wrong
90 if (numFieldsRead != numFields) {
91 LOG(ERROR) << __func__ << ": failed to parse stats for wlan";
92 return false;
93 }
94
95 residencies->emplace(mName, result);
96
97 return true;
98 }
99
getInfo()100 std::unordered_map<std::string, std::vector<State>> WlanStateResidencyDataProvider::getInfo() {
101 std::unordered_map<std::string, std::vector<State>> ret = {
102 {mName,
103 {{.id = ACTIVE_ID, .name = "Active"}, {.id = DEEPSLEEP_ID, .name = "Deep-Sleep"}}},
104 };
105 return ret;
106 }
107
108 } // namespace stats
109 } // namespace power
110 } // namespace hardware
111 } // namespace android
112 } // namespace aidl
113