diff options
Diffstat (limited to 'web/server/static')
| -rw-r--r-- | web/server/static/Makefile.am | 11 | ||||
| -rw-r--r-- | web/server/static/Makefile.in | 647 | ||||
| -rw-r--r-- | web/server/static/README.md | 9 | ||||
| -rw-r--r-- | web/server/static/static-threaded.c | 424 | ||||
| -rw-r--r-- | web/server/static/static-threaded.h | 10 |
5 files changed, 1101 insertions, 0 deletions
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\ No newline at end of file diff --git a/web/server/static/static-threaded.c b/web/server/static/static-threaded.c new file mode 100644 index 000000000..56b8dbf8d --- /dev/null +++ b/web/server/static/static-threaded.c @@ -0,0 +1,424 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +#define WEB_SERVER_INTERNALS 1 +#include "static-threaded.h" + +// ---------------------------------------------------------------------------- +// high level web clients connection management + +static struct web_client *web_client_create_on_fd(int fd, const char *client_ip, const char *client_port) { + struct web_client *w; + + w = web_client_get_from_cache_or_allocate(); + w->ifd = w->ofd = fd; + + strncpyz(w->client_ip, client_ip, sizeof(w->client_ip) - 1); + strncpyz(w->client_port, client_port, sizeof(w->client_port) - 1); + + if(unlikely(!*w->client_ip)) strcpy(w->client_ip, "-"); + if(unlikely(!*w->client_port)) strcpy(w->client_port, "-"); + + web_client_initialize_connection(w); + return(w); +} + +// -------------------------------------------------------------------------------------- +// the main socket listener - STATIC-THREADED + +struct web_server_static_threaded_worker { + netdata_thread_t thread; + + int id; + int running; + + size_t max_sockets; + + volatile size_t connected; + volatile size_t disconnected; + volatile size_t receptions; + volatile size_t sends; + volatile size_t max_concurrent; + + volatile size_t files_read; + volatile size_t file_reads; +}; + +static long long static_threaded_workers_count = 1; +static struct web_server_static_threaded_worker *static_workers_private_data = NULL; +static __thread struct web_server_static_threaded_worker *worker_private = NULL; + +// ---------------------------------------------------------------------------- + +static inline int web_server_check_client_status(struct web_client *w) { + if(unlikely(web_client_check_dead(w) || (!web_client_has_wait_receive(w) && !web_client_has_wait_send(w)))) + return -1; + + return 0; +} + +// ---------------------------------------------------------------------------- +// web server files + +static void *web_server_file_add_callback(POLLINFO *pi, short int *events, void *data) { + struct web_client *w = (struct web_client *)data; + + worker_private->files_read++; + + debug(D_WEB_CLIENT, "%llu: ADDED FILE READ ON FD %d", w->id, pi->fd); + *events = POLLIN; + pi->data = w; + return w; +} + +static void web_werver_file_del_callback(POLLINFO *pi) { + struct web_client *w = (struct web_client *)pi->data; + debug(D_WEB_CLIENT, "%llu: RELEASE FILE READ ON FD %d", w->id, pi->fd); + + w->pollinfo_filecopy_slot = 0; + + if(unlikely(!w->pollinfo_slot)) { + debug(D_WEB_CLIENT, "%llu: CROSS WEB CLIENT CLEANUP (iFD %d, oFD %d)", w->id, pi->fd, w->ofd); + web_client_release(w); + } +} + +static int web_server_file_read_callback(POLLINFO *pi, short int *events) { + struct web_client *w = (struct web_client *)pi->data; + + // if there is no POLLINFO linked to this, it means the client disconnected + // stop the file reading too + if(unlikely(!w->pollinfo_slot)) { + debug(D_WEB_CLIENT, "%llu: PREVENTED ATTEMPT TO READ FILE ON FD %d, ON CLOSED WEB CLIENT", w->id, pi->fd); + return -1; + } + + if(unlikely(w->mode != WEB_CLIENT_MODE_FILECOPY || w->ifd == w->ofd)) { + debug(D_WEB_CLIENT, "%llu: PREVENTED ATTEMPT TO READ FILE ON FD %d, ON NON-FILECOPY WEB CLIENT", w->id, pi->fd); + return -1; + } + + debug(D_WEB_CLIENT, "%llu: READING FILE ON FD %d", w->id, pi->fd); + + worker_private->file_reads++; + ssize_t ret = unlikely(web_client_read_file(w)); + + if(likely(web_client_has_wait_send(w))) { + POLLJOB *p = pi->p; // our POLLJOB + POLLINFO *wpi = pollinfo_from_slot(p, w->pollinfo_slot); // POLLINFO of the client socket + + debug(D_WEB_CLIENT, "%llu: SIGNALING W TO SEND (iFD %d, oFD %d)", w->id, pi->fd, wpi->fd); + p->fds[wpi->slot].events |= POLLOUT; + } + + if(unlikely(ret <= 0 || w->ifd == w->ofd)) { + debug(D_WEB_CLIENT, "%llu: DONE READING FILE ON FD %d", w->id, pi->fd); + return -1; + } + + *events = POLLIN; + return 0; +} + +static int web_server_file_write_callback(POLLINFO *pi, short int *events) { + (void)pi; + (void)events; + + error("Writing to web files is not supported!"); + + return -1; +} + +// ---------------------------------------------------------------------------- +// web server clients + +static void *web_server_add_callback(POLLINFO *pi, short int *events, void *data) { + (void)data; + + worker_private->connected++; + + size_t concurrent = worker_private->connected - worker_private->disconnected; + if(unlikely(concurrent > worker_private->max_concurrent)) + worker_private->max_concurrent = concurrent; + + *events = POLLIN; + + debug(D_WEB_CLIENT_ACCESS, "LISTENER on %d: new connection.", pi->fd); + struct web_client *w = web_client_create_on_fd(pi->fd, pi->client_ip, pi->client_port); + w->pollinfo_slot = pi->slot; + + if(unlikely(pi->socktype == AF_UNIX)) + web_client_set_unix(w); + else + web_client_set_tcp(w); + + debug(D_WEB_CLIENT, "%llu: ADDED CLIENT FD %d", w->id, pi->fd); + return w; +} + +// TCP client disconnected +static void web_server_del_callback(POLLINFO *pi) { + worker_private->disconnected++; + + struct web_client *w = (struct web_client *)pi->data; + + w->pollinfo_slot = 0; + if(unlikely(w->pollinfo_filecopy_slot)) { + POLLINFO *fpi = pollinfo_from_slot(pi->p, w->pollinfo_filecopy_slot); // POLLINFO of the client socket + (void)fpi; + + debug(D_WEB_CLIENT, "%llu: THE CLIENT WILL BE FRED BY READING FILE JOB ON FD %d", w->id, fpi->fd); + } + else { + if(web_client_flag_check(w, WEB_CLIENT_FLAG_DONT_CLOSE_SOCKET)) + pi->flags |= POLLINFO_FLAG_DONT_CLOSE; + + debug(D_WEB_CLIENT, "%llu: CLOSING CLIENT FD %d", w->id, pi->fd); + web_client_release(w); + } +} + +static int web_server_rcv_callback(POLLINFO *pi, short int *events) { + worker_private->receptions++; + + struct web_client *w = (struct web_client *)pi->data; + int fd = pi->fd; + + if(unlikely(web_client_receive(w) < 0)) + return -1; + + debug(D_WEB_CLIENT, "%llu: processing received data on fd %d.", w->id, fd); + web_client_process_request(w); + + if(unlikely(w->mode == WEB_CLIENT_MODE_FILECOPY)) { + if(w->pollinfo_filecopy_slot == 0) { + debug(D_WEB_CLIENT, "%llu: FILECOPY DETECTED ON FD %d", w->id, pi->fd); + + if (unlikely(w->ifd != -1 && w->ifd != w->ofd && w->ifd != fd)) { + // add a new socket to poll_events, with the same + debug(D_WEB_CLIENT, "%llu: CREATING FILECOPY SLOT ON FD %d", w->id, pi->fd); + + POLLINFO *fpi = poll_add_fd( + pi->p + , w->ifd + , 0 + , POLLINFO_FLAG_CLIENT_SOCKET + , "FILENAME" + , "" + , web_server_file_add_callback + , web_werver_file_del_callback + , web_server_file_read_callback + , web_server_file_write_callback + , (void *) w + ); + + if(fpi) + w->pollinfo_filecopy_slot = fpi->slot; + else { + error("Failed to add filecopy fd. Closing client."); + return -1; + } + } + } + } + else { + if(unlikely(w->ifd == fd && web_client_has_wait_receive(w))) + *events |= POLLIN; + } + + if(unlikely(w->ofd == fd && web_client_has_wait_send(w))) + *events |= POLLOUT; + + return web_server_check_client_status(w); +} + +static int web_server_snd_callback(POLLINFO *pi, short int *events) { + worker_private->sends++; + + struct web_client *w = (struct web_client *)pi->data; + int fd = pi->fd; + + debug(D_WEB_CLIENT, "%llu: sending data on fd %d.", w->id, fd); + + if(unlikely(web_client_send(w) < 0)) + return -1; + + if(unlikely(w->ifd == fd && web_client_has_wait_receive(w))) + *events |= POLLIN; + + if(unlikely(w->ofd == fd && web_client_has_wait_send(w))) + *events |= POLLOUT; + + return web_server_check_client_status(w); +} + +static void web_server_tmr_callback(void *timer_data) { + worker_private = (struct web_server_static_threaded_worker *)timer_data; + + static __thread RRDSET *st = NULL; + static __thread RRDDIM *rd_user = NULL, *rd_system = NULL; + + if(unlikely(!st)) { + char id[100 + 1]; + char title[100 + 1]; + + snprintfz(id, 100, "web_thread%d_cpu", worker_private->id + 1); + snprintfz(title, 100, "NetData web server thread No %d CPU usage", worker_private->id + 1); + + st = rrdset_create_localhost( + "netdata" + , id + , NULL + , "web" + , "netdata.web_cpu" + , title + , "milliseconds/s" + , "web" + , "stats" + , 132000 + worker_private->id + , default_rrd_update_every + , RRDSET_TYPE_STACKED + ); + + rd_user = rrddim_add(st, "user", NULL, 1, 1000, RRD_ALGORITHM_INCREMENTAL); + rd_system = rrddim_add(st, "system", NULL, 1, 1000, RRD_ALGORITHM_INCREMENTAL); + } + else + rrdset_next(st); + + struct rusage rusage; + getrusage(RUSAGE_THREAD, &rusage); + rrddim_set_by_pointer(st, rd_user, rusage.ru_utime.tv_sec * 1000000ULL + rusage.ru_utime.tv_usec); + rrddim_set_by_pointer(st, rd_system, rusage.ru_stime.tv_sec * 1000000ULL + rusage.ru_stime.tv_usec); + rrdset_done(st); +} + +// ---------------------------------------------------------------------------- +// web server worker thread + +static void socket_listen_main_static_threaded_worker_cleanup(void *ptr) { + worker_private = (struct web_server_static_threaded_worker *)ptr; + + info("freeing local web clients cache..."); + web_client_cache_destroy(); + + info("stopped after %zu connects, %zu disconnects (max concurrent %zu), %zu receptions and %zu sends", + worker_private->connected, + worker_private->disconnected, + worker_private->max_concurrent, + worker_private->receptions, + worker_private->sends + ); + + worker_private->running = 0; +} + +void *socket_listen_main_static_threaded_worker(void *ptr) { + worker_private = (struct web_server_static_threaded_worker *)ptr; + worker_private->running = 1; + + netdata_thread_cleanup_push(socket_listen_main_static_threaded_worker_cleanup, ptr); + + poll_events(&api_sockets + , web_server_add_callback + , web_server_del_callback + , web_server_rcv_callback + , web_server_snd_callback + , web_server_tmr_callback + , web_allow_connections_from + , NULL + , web_client_first_request_timeout + , web_client_timeout + , default_rrd_update_every * 1000 // timer_milliseconds + , ptr // timer_data + , worker_private->max_sockets + ); + + netdata_thread_cleanup_pop(1); + return NULL; +} + + +// ---------------------------------------------------------------------------- +// web server main thread - also becomes a worker + +static void socket_listen_main_static_threaded_cleanup(void *ptr) { + struct netdata_static_thread *static_thread = (struct netdata_static_thread *)ptr; + static_thread->enabled = NETDATA_MAIN_THREAD_EXITING; + + int i, found = 0; + usec_t max = 2 * USEC_PER_SEC, step = 50000; + + // we start from 1, - 0 is self + for(i = 1; i < static_threaded_workers_count; i++) { + if(static_workers_private_data[i].running) { + found++; + info("stopping worker %d", i + 1); + netdata_thread_cancel(static_workers_private_data[i].thread); + } + else + info("found stopped worker %d", i + 1); + } + + while(found && max > 0) { + max -= step; + info("Waiting %d static web threads to finish...", found); + sleep_usec(step); + found = 0; + + // we start from 1, - 0 is self + for(i = 1; i < static_threaded_workers_count; i++) { + if (static_workers_private_data[i].running) + found++; + } + } + + if(found) + error("%d static web threads are taking too long to finish. Giving up.", found); + + info("closing all web server sockets..."); + listen_sockets_close(&api_sockets); + + info("all static web threads stopped."); + static_thread->enabled = NETDATA_MAIN_THREAD_EXITED; +} + +void *socket_listen_main_static_threaded(void *ptr) { + netdata_thread_cleanup_push(socket_listen_main_static_threaded_cleanup, ptr); + web_server_mode = WEB_SERVER_MODE_STATIC_THREADED; + + if(!api_sockets.opened) + fatal("LISTENER: no listen sockets available."); + + // 6 threads is the optimal value + // since 6 are the parallel connections browsers will do + // so, if the machine has more CPUs, avoid using resources unnecessarily + int def_thread_count = (processors > 6)?6:processors; + + static_threaded_workers_count = config_get_number(CONFIG_SECTION_WEB, "web server threads", def_thread_count); + if(static_threaded_workers_count < 1) static_threaded_workers_count = 1; + + size_t max_sockets = (size_t)config_get_number(CONFIG_SECTION_WEB, "web server max sockets", (long long int)(rlimit_nofile.rlim_cur / 2)); + + static_workers_private_data = callocz((size_t)static_threaded_workers_count, sizeof(struct web_server_static_threaded_worker)); + + web_server_is_multithreaded = (static_threaded_workers_count > 1); + + int i; + for(i = 1; i < static_threaded_workers_count; i++) { + static_workers_private_data[i].id = i; + static_workers_private_data[i].max_sockets = max_sockets / static_threaded_workers_count; + + char tag[50 + 1]; + snprintfz(tag, 50, "WEB_SERVER[static%d]", i+1); + + info("starting worker %d", i+1); + netdata_thread_create(&static_workers_private_data[i].thread, tag, NETDATA_THREAD_OPTION_DEFAULT, socket_listen_main_static_threaded_worker, (void *)&static_workers_private_data[i]); + } + + // and the main one + static_workers_private_data[0].max_sockets = max_sockets / static_threaded_workers_count; + socket_listen_main_static_threaded_worker((void *)&static_workers_private_data[0]); + + netdata_thread_cleanup_pop(1); + return NULL; +} diff --git a/web/server/static/static-threaded.h b/web/server/static/static-threaded.h new file mode 100644 index 000000000..5f4862e5b --- /dev/null +++ b/web/server/static/static-threaded.h @@ -0,0 +1,10 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +#ifndef NETDATA_WEB_SERVER_STATIC_THREADED_H +#define NETDATA_WEB_SERVER_STATIC_THREADED_H + +#include "web/server/web_server.h" + +extern void *socket_listen_main_static_threaded(void *ptr); + +#endif //NETDATA_WEB_SERVER_STATIC_THREADED_H |