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/*
* Copyright (C) 2019 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.
*/
#include "include/stats_buffer_writer.h"
#ifdef __ANDROID__
#include <cutils/properties.h>
#endif
#include <errno.h>
#include <sys/time.h>
#include <sys/uio.h>
#include "statsd_writer.h"
static const uint32_t kStatsEventTag = 1937006964;
extern struct android_log_transport_write statsdLoggerWrite;
static int __write_to_statsd_init(struct iovec* vec, size_t nr);
static int (*__write_to_statsd)(struct iovec* vec, size_t nr) = __write_to_statsd_init;
void note_log_drop(int error, int atomId) {
statsdLoggerWrite.noteDrop(error, atomId);
}
void stats_log_close() {
statsd_writer_init_lock();
__write_to_statsd = __write_to_statsd_init;
if (statsdLoggerWrite.close) {
(*statsdLoggerWrite.close)();
}
statsd_writer_init_unlock();
}
int write_buffer_to_statsd(void* buffer, size_t size, uint32_t atomId) {
int ret = 1;
#ifdef __ANDROID__
bool statsdEnabled = property_get_bool("ro.statsd.enable", true);
#else
bool statsdEnabled = false;
#endif
if (statsdEnabled) {
struct iovec vecs[2];
vecs[0].iov_base = (void*)&kStatsEventTag;
vecs[0].iov_len = sizeof(kStatsEventTag);
vecs[1].iov_base = buffer;
vecs[1].iov_len = size;
ret = __write_to_statsd(vecs, 2);
if (ret < 0) {
note_log_drop(ret, atomId);
}
}
return ret;
}
static int __write_to_stats_daemon(struct iovec* vec, size_t nr) {
int save_errno;
struct timespec ts;
size_t len, i;
for (len = i = 0; i < nr; ++i) {
len += vec[i].iov_len;
}
if (!len) {
return -EINVAL;
}
save_errno = errno;
#if defined(__ANDROID__)
clock_gettime(CLOCK_REALTIME, &ts);
#else
struct timeval tv;
gettimeofday(&tv, NULL);
ts.tv_sec = tv.tv_sec;
ts.tv_nsec = tv.tv_usec * 1000;
#endif
int ret = (int)(*statsdLoggerWrite.write)(&ts, vec, nr);
errno = save_errno;
return ret;
}
static int __write_to_statsd_initialize_locked() {
if (!statsdLoggerWrite.open || ((*statsdLoggerWrite.open)() < 0)) {
if (statsdLoggerWrite.close) {
(*statsdLoggerWrite.close)();
return -ENODEV;
}
}
return 1;
}
static int __write_to_statsd_init(struct iovec* vec, size_t nr) {
int ret, save_errno = errno;
statsd_writer_init_lock();
if (__write_to_statsd == __write_to_statsd_init) {
ret = __write_to_statsd_initialize_locked();
if (ret < 0) {
statsd_writer_init_unlock();
errno = save_errno;
return ret;
}
__write_to_statsd = __write_to_stats_daemon;
}
statsd_writer_init_unlock();
ret = __write_to_statsd(vec, nr);
errno = save_errno;
return ret;
}
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