1 /*
2 * Copyright (C) 2019 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 "include/stats_buffer_writer.h"
18 #ifdef __ANDROID__
19 #include <cutils/properties.h>
20 #endif
21 #include <errno.h>
22 #include <sys/time.h>
23 #include <sys/uio.h>
24 #include "statsd_writer.h"
25
26 static const uint32_t kStatsEventTag = 1937006964;
27
28 extern struct android_log_transport_write statsdLoggerWrite;
29
30 static int __write_to_statsd_init(struct iovec* vec, size_t nr);
31 static int (*__write_to_statsd)(struct iovec* vec, size_t nr) = __write_to_statsd_init;
32
note_log_drop(int error,int atomId)33 void note_log_drop(int error, int atomId) {
34 statsdLoggerWrite.noteDrop(error, atomId);
35 }
36
stats_log_close()37 void stats_log_close() {
38 statsd_writer_init_lock();
39 __write_to_statsd = __write_to_statsd_init;
40 if (statsdLoggerWrite.close) {
41 (*statsdLoggerWrite.close)();
42 }
43 statsd_writer_init_unlock();
44 }
45
stats_log_is_closed()46 int stats_log_is_closed() {
47 return statsdLoggerWrite.isClosed && (*statsdLoggerWrite.isClosed)();
48 }
49
write_buffer_to_statsd(void * buffer,size_t size,uint32_t atomId)50 int write_buffer_to_statsd(void* buffer, size_t size, uint32_t atomId) {
51 int ret = 1;
52
53 struct iovec vecs[2];
54 vecs[0].iov_base = (void*)&kStatsEventTag;
55 vecs[0].iov_len = sizeof(kStatsEventTag);
56 vecs[1].iov_base = buffer;
57 vecs[1].iov_len = size;
58
59 ret = __write_to_statsd(vecs, 2);
60
61 if (ret < 0) {
62 note_log_drop(ret, atomId);
63 }
64
65 return ret;
66 }
67
__write_to_stats_daemon(struct iovec * vec,size_t nr)68 static int __write_to_stats_daemon(struct iovec* vec, size_t nr) {
69 int save_errno;
70 struct timespec ts;
71 size_t len, i;
72
73 for (len = i = 0; i < nr; ++i) {
74 len += vec[i].iov_len;
75 }
76 if (!len) {
77 return -EINVAL;
78 }
79
80 save_errno = errno;
81 #if defined(__ANDROID__)
82 clock_gettime(CLOCK_REALTIME, &ts);
83 #else
84 struct timeval tv;
85 gettimeofday(&tv, NULL);
86 ts.tv_sec = tv.tv_sec;
87 ts.tv_nsec = tv.tv_usec * 1000;
88 #endif
89
90 int ret = (int)(*statsdLoggerWrite.write)(&ts, vec, nr);
91 errno = save_errno;
92 return ret;
93 }
94
__write_to_statsd_initialize_locked()95 static int __write_to_statsd_initialize_locked() {
96 if (!statsdLoggerWrite.open || ((*statsdLoggerWrite.open)() < 0)) {
97 if (statsdLoggerWrite.close) {
98 (*statsdLoggerWrite.close)();
99 return -ENODEV;
100 }
101 }
102 return 1;
103 }
104
__write_to_statsd_init(struct iovec * vec,size_t nr)105 static int __write_to_statsd_init(struct iovec* vec, size_t nr) {
106 int ret, save_errno = errno;
107
108 statsd_writer_init_lock();
109
110 if (__write_to_statsd == __write_to_statsd_init) {
111 ret = __write_to_statsd_initialize_locked();
112 if (ret < 0) {
113 statsd_writer_init_unlock();
114 errno = save_errno;
115 return ret;
116 }
117
118 __write_to_statsd = __write_to_stats_daemon;
119 }
120
121 statsd_writer_init_unlock();
122
123 ret = __write_to_statsd(vec, nr);
124 errno = save_errno;
125 return ret;
126 }
127