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-rw-r--r--web/server/multi/multi-threaded.c314
1 files changed, 0 insertions, 314 deletions
diff --git a/web/server/multi/multi-threaded.c b/web/server/multi/multi-threaded.c
deleted file mode 100644
index 37bdd38a..00000000
--- a/web/server/multi/multi-threaded.c
+++ /dev/null
@@ -1,314 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-or-later
-
-#define WEB_SERVER_INTERNALS 1
-#include "multi-threaded.h"
-
-// --------------------------------------------------------------------------------------
-// the thread of a single client - for the MULTI-THREADED web server
-
-// 1. waits for input and output, using async I/O
-// 2. it processes HTTP requests
-// 3. it generates HTTP responses
-// 4. it copies data from input to output if mode is FILECOPY
-
-int web_client_timeout = DEFAULT_DISCONNECT_IDLE_WEB_CLIENTS_AFTER_SECONDS;
-int web_client_first_request_timeout = DEFAULT_TIMEOUT_TO_RECEIVE_FIRST_WEB_REQUEST;
-long web_client_streaming_rate_t = 0L;
-
-static void multi_threaded_web_client_worker_main_cleanup(void *ptr) {
- struct web_client *w = ptr;
- WEB_CLIENT_IS_DEAD(w);
- w->running = 0;
-}
-
-static void *multi_threaded_web_client_worker_main(void *ptr) {
- netdata_thread_cleanup_push(multi_threaded_web_client_worker_main_cleanup, ptr);
-
- struct web_client *w = ptr;
- w->running = 1;
-
- struct pollfd fds[2], *ifd, *ofd;
- int retval, timeout_ms;
- nfds_t fdmax = 0;
-
- while(!netdata_exit) {
- if(unlikely(web_client_check_dead(w))) {
- debug(D_WEB_CLIENT, "%llu: client is dead.", w->id);
- break;
- }
- else if(unlikely(!web_client_has_wait_receive(w) && !web_client_has_wait_send(w))) {
- debug(D_WEB_CLIENT, "%llu: client is not set for neither receiving nor sending data.", w->id);
- break;
- }
-
- if(unlikely(w->ifd < 0 || w->ofd < 0)) {
- error("%llu: invalid file descriptor, ifd = %d, ofd = %d (required 0 <= fd", w->id, w->ifd, w->ofd);
- break;
- }
-
- if(w->ifd == w->ofd) {
- fds[0].fd = w->ifd;
- fds[0].events = 0;
- fds[0].revents = 0;
-
- if(web_client_has_wait_receive(w)) fds[0].events |= POLLIN;
- if(web_client_has_wait_send(w)) fds[0].events |= POLLOUT;
-
- fds[1].fd = -1;
- fds[1].events = 0;
- fds[1].revents = 0;
-
- ifd = ofd = &fds[0];
-
- fdmax = 1;
- }
- else {
- fds[0].fd = w->ifd;
- fds[0].events = 0;
- fds[0].revents = 0;
- if(web_client_has_wait_receive(w)) fds[0].events |= POLLIN;
- ifd = &fds[0];
-
- fds[1].fd = w->ofd;
- fds[1].events = 0;
- fds[1].revents = 0;
- if(web_client_has_wait_send(w)) fds[1].events |= POLLOUT;
- ofd = &fds[1];
-
- fdmax = 2;
- }
-
- debug(D_WEB_CLIENT, "%llu: Waiting socket async I/O for %s %s", w->id, web_client_has_wait_receive(w)?"INPUT":"", web_client_has_wait_send(w)?"OUTPUT":"");
- errno = 0;
- timeout_ms = web_client_timeout * 1000;
- retval = poll(fds, fdmax, timeout_ms);
-
- if(unlikely(netdata_exit)) break;
-
- if(unlikely(retval == -1)) {
- if(errno == EAGAIN || errno == EINTR) {
- debug(D_WEB_CLIENT, "%llu: EAGAIN received.", w->id);
- continue;
- }
-
- debug(D_WEB_CLIENT, "%llu: LISTENER: poll() failed (input fd = %d, output fd = %d). Closing client.", w->id, w->ifd, w->ofd);
- break;
- }
- else if(unlikely(!retval)) {
- debug(D_WEB_CLIENT, "%llu: Timeout while waiting socket async I/O for %s %s", w->id, web_client_has_wait_receive(w)?"INPUT":"", web_client_has_wait_send(w)?"OUTPUT":"");
- break;
- }
-
- if(unlikely(netdata_exit)) break;
-
- int used = 0;
- if(web_client_has_wait_send(w) && ofd->revents & POLLOUT) {
- used++;
- if(web_client_send(w) < 0) {
- debug(D_WEB_CLIENT, "%llu: Cannot send data to client. Closing client.", w->id);
- break;
- }
- }
-
- if(unlikely(netdata_exit)) break;
-
- if(web_client_has_wait_receive(w) && (ifd->revents & POLLIN || ifd->revents & POLLPRI)) {
- used++;
- if(web_client_receive(w) < 0) {
- debug(D_WEB_CLIENT, "%llu: Cannot receive data from client. Closing client.", w->id);
- break;
- }
-
- if(w->mode == WEB_CLIENT_MODE_NORMAL) {
- debug(D_WEB_CLIENT, "%llu: Attempting to process received data.", w->id);
- web_client_process_request(w);
-
- // if the sockets are closed, may have transferred this client
- // to plugins.d
- if(unlikely(w->mode == WEB_CLIENT_MODE_STREAM))
- break;
- }
- }
-
- if(unlikely(!used)) {
- debug(D_WEB_CLIENT_ACCESS, "%llu: Received error on socket.", w->id);
- break;
- }
- }
-
- if(w->mode != WEB_CLIENT_MODE_STREAM)
- web_server_log_connection(w, "DISCONNECTED");
-
- web_client_request_done(w);
-
- debug(D_WEB_CLIENT, "%llu: done...", w->id);
-
- // close the sockets/files now
- // to free file descriptors
- if(w->ifd == w->ofd) {
- if(w->ifd != -1) close(w->ifd);
- }
- else {
- if(w->ifd != -1) close(w->ifd);
- if(w->ofd != -1) close(w->ofd);
- }
- w->ifd = -1;
- w->ofd = -1;
-
- netdata_thread_cleanup_pop(1);
- return NULL;
-}
-
-// --------------------------------------------------------------------------------------
-// the main socket listener - MULTI-THREADED
-
-// 1. it accepts new incoming requests on our port
-// 2. creates a new web_client for each connection received
-// 3. spawns a new netdata_thread to serve the client (this is optimal for keep-alive clients)
-// 4. cleans up old web_clients that their netdata_threads have been exited
-
-static void web_client_multi_threaded_web_server_release_clients(void) {
- struct web_client *w;
- for(w = web_clients_cache.used; w ; ) {
- if(unlikely(!w->running && web_client_check_dead(w))) {
- struct web_client *t = w->next;
- web_client_release(w);
- w = t;
- }
- else
- w = w->next;
- }
-}
-
-static void web_client_multi_threaded_web_server_stop_all_threads(void) {
- struct web_client *w;
-
- int found = 1;
- usec_t max = 2 * USEC_PER_SEC, step = 50000;
- for(w = web_clients_cache.used; w ; w = w->next) {
- if(w->running) {
- found++;
- info("stopping web client %s, id %llu", w->client_ip, w->id);
- netdata_thread_cancel(w->thread);
- }
- }
-
- while(found && max > 0) {
- max -= step;
- info("Waiting %d web threads to finish...", found);
- sleep_usec(step);
- found = 0;
- for(w = web_clients_cache.used; w ; w = w->next)
- if(w->running) found++;
- }
-
- if(found)
- error("%d web threads are taking too long to finish. Giving up.", found);
-}
-
-static struct pollfd *socket_listen_main_multi_threaded_fds = NULL;
-
-static void socket_listen_main_multi_threaded_cleanup(void *data) {
- struct netdata_static_thread *static_thread = (struct netdata_static_thread *)data;
- static_thread->enabled = NETDATA_MAIN_THREAD_EXITING;
-
- info("cleaning up...");
-
- info("releasing allocated memory...");
- freez(socket_listen_main_multi_threaded_fds);
-
- info("closing all sockets...");
- listen_sockets_close(&api_sockets);
-
- info("stopping all running web server threads...");
- web_client_multi_threaded_web_server_stop_all_threads();
-
- info("freeing web clients cache...");
- web_client_cache_destroy();
-
- info("cleanup completed.");
- static_thread->enabled = NETDATA_MAIN_THREAD_EXITED;
-}
-
-#define CLEANUP_EVERY_EVENTS 60
-void *socket_listen_main_multi_threaded(void *ptr) {
- netdata_thread_cleanup_push(socket_listen_main_multi_threaded_cleanup, ptr);
-
- web_server_mode = WEB_SERVER_MODE_MULTI_THREADED;
- web_server_is_multithreaded = 1;
-
- struct web_client *w;
- int retval, counter = 0;
-
- if(!api_sockets.opened)
- fatal("LISTENER: No sockets to listen to.");
-
- socket_listen_main_multi_threaded_fds = callocz(sizeof(struct pollfd), api_sockets.opened);
-
- size_t i;
- for(i = 0; i < api_sockets.opened ;i++) {
- socket_listen_main_multi_threaded_fds[i].fd = api_sockets.fds[i];
- socket_listen_main_multi_threaded_fds[i].events = POLLIN;
- socket_listen_main_multi_threaded_fds[i].revents = 0;
-
- info("Listening on '%s'", (api_sockets.fds_names[i])?api_sockets.fds_names[i]:"UNKNOWN");
- }
-
- int timeout_ms = 1 * 1000;
-
- while(!netdata_exit) {
-
- // debug(D_WEB_CLIENT, "LISTENER: Waiting...");
- retval = poll(socket_listen_main_multi_threaded_fds, api_sockets.opened, timeout_ms);
-
- if(unlikely(retval == -1)) {
- error("LISTENER: poll() failed.");
- continue;
- }
- else if(unlikely(!retval)) {
- debug(D_WEB_CLIENT, "LISTENER: poll() timeout.");
- counter++;
- continue;
- }
-
- for(i = 0 ; i < api_sockets.opened ; i++) {
- short int revents = socket_listen_main_multi_threaded_fds[i].revents;
-
- // check for new incoming connections
- if(revents & POLLIN || revents & POLLPRI) {
- socket_listen_main_multi_threaded_fds[i].revents = 0;
-
- w = web_client_create_on_listenfd(socket_listen_main_multi_threaded_fds[i].fd);
- if(unlikely(!w)) {
- // no need for error log - web_client_create_on_listenfd already logged the error
- continue;
- }
-
- if(api_sockets.fds_families[i] == AF_UNIX)
- web_client_set_unix(w);
- else
- web_client_set_tcp(w);
-
- char tag[NETDATA_THREAD_TAG_MAX + 1];
- snprintfz(tag, NETDATA_THREAD_TAG_MAX, "WEB_CLIENT[%llu,[%s]:%s]", w->id, w->client_ip, w->client_port);
-
- w->running = 1;
- if(netdata_thread_create(&w->thread, tag, NETDATA_THREAD_OPTION_DONT_LOG, multi_threaded_web_client_worker_main, w) != 0) {
- w->running = 0;
- web_client_release(w);
- }
- }
- }
-
- counter++;
- if(counter > CLEANUP_EVERY_EVENTS) {
- counter = 0;
- web_client_multi_threaded_web_server_release_clients();
- }
- }
-
- netdata_thread_cleanup_pop(1);
- return NULL;
-}
-
-
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