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// SPDX-License-Identifier: GPL-3.0-or-later
#include "sender-internals.h"
static __thread BUFFER *sender_thread_buffer = NULL;
static __thread bool sender_thread_buffer_used = false;
static __thread time_t sender_thread_buffer_last_reset_s = 0;
void sender_thread_buffer_free(void) {
buffer_free(sender_thread_buffer);
sender_thread_buffer = NULL;
sender_thread_buffer_used = false;
}
// Collector thread starting a transmission
BUFFER *sender_start(struct sender_state *s) {
if(unlikely(sender_thread_buffer_used))
fatal("STREAMING: thread buffer is used multiple times concurrently.");
if(unlikely(rrdpush_sender_last_buffer_recreate_get(s) > sender_thread_buffer_last_reset_s)) {
if(unlikely(sender_thread_buffer && sender_thread_buffer->size > THREAD_BUFFER_INITIAL_SIZE)) {
buffer_free(sender_thread_buffer);
sender_thread_buffer = NULL;
}
}
if(unlikely(!sender_thread_buffer)) {
sender_thread_buffer = buffer_create(THREAD_BUFFER_INITIAL_SIZE, &netdata_buffers_statistics.buffers_streaming);
sender_thread_buffer_last_reset_s = rrdpush_sender_last_buffer_recreate_get(s);
}
sender_thread_buffer_used = true;
buffer_flush(sender_thread_buffer);
return sender_thread_buffer;
}
#define SENDER_BUFFER_ADAPT_TO_TIMES_MAX_SIZE 3
// Collector thread finishing a transmission
void sender_commit(struct sender_state *s, BUFFER *wb, STREAM_TRAFFIC_TYPE type) {
if(unlikely(wb != sender_thread_buffer))
fatal("STREAMING: sender is trying to commit a buffer that is not this thread's buffer.");
if(unlikely(!sender_thread_buffer_used))
fatal("STREAMING: sender is committing a buffer twice.");
sender_thread_buffer_used = false;
char *src = (char *)buffer_tostring(wb);
size_t src_len = buffer_strlen(wb);
if(unlikely(!src || !src_len))
return;
sender_lock(s);
#ifdef NETDATA_LOG_STREAM_SENDER
if(type == STREAM_TRAFFIC_TYPE_METADATA) {
if(!s->stream_log_fp) {
char filename[FILENAME_MAX + 1];
snprintfz(filename, FILENAME_MAX, "/tmp/stream-sender-%s.txt", s->host ? rrdhost_hostname(s->host) : "unknown");
s->stream_log_fp = fopen(filename, "w");
}
fprintf(s->stream_log_fp, "\n--- SEND MESSAGE START: %s ----\n"
"%s"
"--- SEND MESSAGE END ----------------------------------------\n"
, rrdhost_hostname(s->host), src
);
}
#endif
if(unlikely(s->buffer->max_size < (src_len + 1) * SENDER_BUFFER_ADAPT_TO_TIMES_MAX_SIZE)) {
netdata_log_info("STREAM %s [send to %s]: max buffer size of %zu is too small for a data message of size %zu. Increasing the max buffer size to %d times the max data message size.",
rrdhost_hostname(s->host), s->connected_to, s->buffer->max_size, buffer_strlen(wb) + 1, SENDER_BUFFER_ADAPT_TO_TIMES_MAX_SIZE);
s->buffer->max_size = (src_len + 1) * SENDER_BUFFER_ADAPT_TO_TIMES_MAX_SIZE;
}
if (s->compressor.initialized) {
while(src_len) {
size_t size_to_compress = src_len;
if(unlikely(size_to_compress > COMPRESSION_MAX_MSG_SIZE)) {
if (stream_has_capability(s, STREAM_CAP_BINARY))
size_to_compress = COMPRESSION_MAX_MSG_SIZE;
else {
if (size_to_compress > COMPRESSION_MAX_MSG_SIZE) {
// we need to find the last newline
// so that the decompressor will have a whole line to work with
const char *t = &src[COMPRESSION_MAX_MSG_SIZE];
while (--t >= src)
if (unlikely(*t == '\n'))
break;
if (t <= src) {
size_to_compress = COMPRESSION_MAX_MSG_SIZE;
} else
size_to_compress = t - src + 1;
}
}
}
const char *dst;
size_t dst_len = rrdpush_compress(&s->compressor, src, size_to_compress, &dst);
if (!dst_len) {
netdata_log_error("STREAM %s [send to %s]: COMPRESSION failed. Resetting compressor and re-trying",
rrdhost_hostname(s->host), s->connected_to);
rrdpush_compression_initialize(s);
dst_len = rrdpush_compress(&s->compressor, src, size_to_compress, &dst);
if(!dst_len) {
netdata_log_error("STREAM %s [send to %s]: COMPRESSION failed again. Deactivating compression",
rrdhost_hostname(s->host), s->connected_to);
worker_is_busy(WORKER_SENDER_JOB_DISCONNECT_NO_COMPRESSION);
rrdpush_compression_deactivate(s);
rrdpush_sender_thread_close_socket(s);
sender_unlock(s);
return;
}
}
rrdpush_signature_t signature = rrdpush_compress_encode_signature(dst_len);
#ifdef NETDATA_INTERNAL_CHECKS
// check if reversing the signature provides the same length
size_t decoded_dst_len = rrdpush_decompress_decode_signature((const char *)&signature, sizeof(signature));
if(decoded_dst_len != dst_len)
fatal("RRDPUSH COMPRESSION: invalid signature, original payload %zu bytes, "
"compressed payload length %zu bytes, but signature says payload is %zu bytes",
size_to_compress, dst_len, decoded_dst_len);
#endif
if(cbuffer_add_unsafe(s->buffer, (const char *)&signature, sizeof(signature)))
s->flags |= SENDER_FLAG_OVERFLOW;
else {
if(cbuffer_add_unsafe(s->buffer, dst, dst_len))
s->flags |= SENDER_FLAG_OVERFLOW;
else
s->sent_bytes_on_this_connection_per_type[type] += dst_len + sizeof(signature);
}
src = src + size_to_compress;
src_len -= size_to_compress;
}
}
else if(cbuffer_add_unsafe(s->buffer, src, src_len))
s->flags |= SENDER_FLAG_OVERFLOW;
else
s->sent_bytes_on_this_connection_per_type[type] += src_len;
replication_recalculate_buffer_used_ratio_unsafe(s);
bool signal_sender = false;
if(!rrdpush_sender_pipe_has_pending_data(s)) {
rrdpush_sender_pipe_set_pending_data(s);
signal_sender = true;
}
sender_unlock(s);
if(signal_sender && (!stream_has_capability(s, STREAM_CAP_INTERPOLATED) || type != STREAM_TRAFFIC_TYPE_DATA))
rrdpush_signal_sender_to_wake_up(s);
}
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