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