diff options
Diffstat (limited to 'web/server/multi')
| -rw-r--r-- | web/server/multi/Makefile.am | 11 | ||||
| -rw-r--r-- | web/server/multi/Makefile.in | 647 | ||||
| -rw-r--r-- | web/server/multi/README.md | 8 | ||||
| -rw-r--r-- | web/server/multi/multi-threaded.c | 314 | ||||
| -rw-r--r-- | web/server/multi/multi-threaded.h | 10 |
5 files changed, 0 insertions, 990 deletions
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\ No newline at end of file diff --git a/web/server/multi/multi-threaded.c b/web/server/multi/multi-threaded.c deleted file mode 100644 index 37bdd38ad..000000000 --- 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; -} - - diff --git a/web/server/multi/multi-threaded.h b/web/server/multi/multi-threaded.h deleted file mode 100644 index d7ebf3c54..000000000 --- a/web/server/multi/multi-threaded.h +++ /dev/null @@ -1,10 +0,0 @@ -// SPDX-License-Identifier: GPL-3.0-or-later - -#ifndef NETDATA_WEB_SERVER_MULTI_THREADED_H -#define NETDATA_WEB_SERVER_MULTI_THREADED_H - -#include "web/server/web_server.h" - -extern void *socket_listen_main_multi_threaded(void *ptr); - -#endif //NETDATA_WEB_SERVER_MULTI_THREADED_H |