#include #include #include static void ngx_clean_old_cycles(ngx_event_t *ev); volatile ngx_cycle_t *ngx_cycle; ngx_array_t ngx_old_cycles; static ngx_pool_t *ngx_temp_pool; static ngx_event_t ngx_cleaner_event; ngx_uint_t ngx_test_config; /* STUB NAME */ static ngx_connection_t dumb; /* STUB */ ngx_cycle_t *ngx_init_cycle(ngx_cycle_t *old_cycle) { void *rv; ngx_uint_t i, n, failed; ngx_log_t *log; ngx_conf_t conf; ngx_pool_t *pool; ngx_cycle_t *cycle, **old; ngx_socket_t fd; ngx_open_file_t *file; ngx_listening_t *ls, *nls; ngx_core_module_t *module; log = old_cycle->log; if (!(pool = ngx_create_pool(16 * 1024, log))) { return NULL; } pool->log = log; if (!(cycle = ngx_pcalloc(pool, sizeof(ngx_cycle_t)))) { ngx_destroy_pool(pool); return NULL; } cycle->pool = pool; cycle->log = log; cycle->old_cycle = old_cycle; cycle->conf_file = old_cycle->conf_file; cycle->root.len = sizeof(NGX_PREFIX) - 1; cycle->root.data = (u_char *) NGX_PREFIX; n = old_cycle->pathes.nelts ? old_cycle->pathes.nelts : 10; if (!(cycle->pathes.elts = ngx_pcalloc(pool, n * sizeof(ngx_path_t *)))) { ngx_destroy_pool(pool); return NULL; } cycle->pathes.nelts = 0; cycle->pathes.size = sizeof(ngx_path_t *); cycle->pathes.nalloc = n; cycle->pathes.pool = pool; n = old_cycle->open_files.nelts ? old_cycle->open_files.nelts : 20; cycle->open_files.elts = ngx_pcalloc(pool, n * sizeof(ngx_open_file_t)); if (cycle->open_files.elts == NULL) { ngx_destroy_pool(pool); return NULL; } cycle->open_files.nelts = 0; cycle->open_files.size = sizeof(ngx_open_file_t); cycle->open_files.nalloc = n; cycle->open_files.pool = pool; if (!(cycle->new_log = ngx_log_create_errlog(cycle, NULL))) { ngx_destroy_pool(pool); return NULL; } n = old_cycle->listening.nelts ? old_cycle->listening.nelts : 10; cycle->listening.elts = ngx_pcalloc(pool, n * sizeof(ngx_listening_t)); if (cycle->listening.elts == NULL) { ngx_destroy_pool(pool); return NULL; } cycle->listening.nelts = 0; cycle->listening.size = sizeof(ngx_listening_t); cycle->listening.nalloc = n; cycle->listening.pool = pool; cycle->conf_ctx = ngx_pcalloc(pool, ngx_max_module * sizeof(void *)); if (cycle->conf_ctx == NULL) { ngx_destroy_pool(pool); return NULL; } for (i = 0; ngx_modules[i]; i++) { if (ngx_modules[i]->type != NGX_CORE_MODULE) { continue; } module = ngx_modules[i]->ctx; if (module->create_conf) { rv = module->create_conf(cycle); if (rv == NGX_CONF_ERROR) { ngx_destroy_pool(pool); return NULL; } cycle->conf_ctx[ngx_modules[i]->index] = rv; } } ngx_memzero(&conf, sizeof(ngx_conf_t)); /* STUB: init array ? */ conf.args = ngx_create_array(pool, 10, sizeof(ngx_str_t)); if (conf.args == NULL) { ngx_destroy_pool(pool); return NULL; } conf.ctx = cycle->conf_ctx; conf.cycle = cycle; conf.pool = pool; conf.log = log; conf.module_type = NGX_CORE_MODULE; conf.cmd_type = NGX_MAIN_CONF; if (ngx_conf_parse(&conf, &cycle->conf_file) != NGX_CONF_OK) { ngx_destroy_pool(pool); return NULL; } if (ngx_test_config) { ngx_log_error(NGX_LOG_INFO, log, 0, "the configuration file %s syntax is ok", cycle->conf_file.data); } for (i = 0; ngx_modules[i]; i++) { if (ngx_modules[i]->type != NGX_CORE_MODULE) { continue; } module = ngx_modules[i]->ctx; if (module->init_conf) { if (module->init_conf(cycle, cycle->conf_ctx[ngx_modules[i]->index]) == NGX_CONF_ERROR) { ngx_destroy_pool(pool); return NULL; } } } failed = 0; #if !(WIN32) if (ngx_create_pidfile(cycle, old_cycle) == NGX_ERROR) { failed = 1; } #endif if (!failed) { file = cycle->open_files.elts; for (i = 0; i < cycle->open_files.nelts; i++) { if (file[i].name.data == NULL) { continue; } file[i].fd = ngx_open_file(file[i].name.data, NGX_FILE_RDWR, NGX_FILE_CREATE_OR_OPEN|NGX_FILE_APPEND); if (file[i].fd == NGX_INVALID_FILE) { ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, ngx_open_file_n " \"%s\" failed", file[i].name.data); failed = 1; break; } #if (WIN32) if (ngx_file_append_mode(file[i].fd) == NGX_ERROR) { ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, ngx_file_append_mode_n " \"%s\" failed", file[i].name.data); failed = 1; break; } #else if (fcntl(file[i].fd, F_SETFD, FD_CLOEXEC) == -1) { ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "fcntl(FD_CLOEXEC) \"%s\" failed", file[i].name.data); failed = 1; break; } #endif } } cycle->log = cycle->new_log; pool->log = cycle->new_log; if (!failed) { if (old_cycle->listening.nelts) { ls = old_cycle->listening.elts; for (i = 0; i < old_cycle->listening.nelts; i++) { ls[i].remain = 0; } nls = cycle->listening.elts; for (n = 0; n < cycle->listening.nelts; n++) { for (i = 0; i < old_cycle->listening.nelts; i++) { if (ls[i].ignore) { continue; } if (ngx_memcmp(nls[n].sockaddr, ls[i].sockaddr, ls[i].socklen) == 0) { fd = ls[i].fd; #if (WIN32) /* * Winsock assignes a socket number divisible by 4 so * to find a connection we divide a socket number by 4. */ fd /= 4; #endif if (fd >= (ngx_socket_t) cycle->connection_n) { ngx_log_error(NGX_LOG_EMERG, log, 0, "%d connections is not enough to hold " "an open listening socket on %s, " "required at least %d connections", cycle->connection_n, ls[i].addr_text.data, fd); failed = 1; break; } nls[n].fd = ls[i].fd; nls[i].remain = 1; ls[i].remain = 1; break; } } if (nls[n].fd == -1) { nls[n].new = 1; } } } else { ls = cycle->listening.elts; for (i = 0; i < cycle->listening.nelts; i++) { ls[i].new = 1; } } if (!ngx_test_config && !failed) { if (ngx_open_listening_sockets(cycle) == NGX_ERROR) { failed = 1; } } } #if !(WIN32) if (!failed && !ngx_test_config) { if (dup2(cycle->log->file->fd, STDERR_FILENO) == NGX_ERROR) { ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "dup2(STDERR) failed"); failed = 1; } } #endif if (failed) { /* rollback the new cycle configuration */ file = cycle->open_files.elts; for (i = 0; i < cycle->open_files.nelts; i++) { if (file[i].fd == NGX_INVALID_FILE) { continue; } if (ngx_close_file(file[i].fd) == NGX_FILE_ERROR) { ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, ngx_close_file_n " \"%s\" failed", file[i].name.data); } } if (ngx_test_config) { ngx_destroy_pool(pool); return NULL; } ls = cycle->listening.elts; for (i = 0; i < cycle->listening.nelts; i++) { if (ls[i].new && ls[i].fd == -1) { continue; } if (ngx_close_socket(ls[i].fd) == -1) { ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno, ngx_close_socket_n " %s failed", ls[i].addr_text.data); } } ngx_destroy_pool(pool); return NULL; } /* commit the new cycle configuration */ pool->log = cycle->log; for (i = 0; ngx_modules[i]; i++) { if (ngx_modules[i]->init_module) { if (ngx_modules[i]->init_module(cycle) == NGX_ERROR) { /* fatal */ exit(1); } } } /* close and delete stuff that lefts from an old cycle */ /* close the unneeded listening sockets */ ls = old_cycle->listening.elts; for (i = 0; i < old_cycle->listening.nelts; i++) { if (ls[i].remain) { continue; } if (ngx_close_socket(ls[i].fd) == -1) { ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno, ngx_close_socket_n " %s failed", ls[i].addr_text.data); } } /* close the unneeded open files */ file = old_cycle->open_files.elts; for (i = 0; i < old_cycle->open_files.nelts; i++) { if (file[i].fd == NGX_INVALID_FILE) { continue; } if (ngx_close_file(file[i].fd) == NGX_FILE_ERROR) { ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, ngx_close_file_n " \"%s\" failed", file[i].name.data); } } if (old_cycle->connections == NULL) { /* an old cycle is an init cycle */ ngx_destroy_pool(old_cycle->pool); return cycle; } if (ngx_process == NGX_PROCESS_MASTER) { ngx_destroy_pool(old_cycle->pool); return cycle; } if (ngx_temp_pool == NULL) { ngx_temp_pool = ngx_create_pool(128, cycle->log); if (ngx_temp_pool == NULL) { ngx_log_error(NGX_LOG_EMERG, cycle->log, 0, "can not create ngx_temp_pool"); exit(1); } n = 10; ngx_old_cycles.elts = ngx_pcalloc(ngx_temp_pool, n * sizeof(ngx_cycle_t *)); if (ngx_old_cycles.elts == NULL) { exit(1); } ngx_old_cycles.nelts = 0; ngx_old_cycles.size = sizeof(ngx_cycle_t *); ngx_old_cycles.nalloc = n; ngx_old_cycles.pool = ngx_temp_pool; ngx_cleaner_event.event_handler = ngx_clean_old_cycles; ngx_cleaner_event.log = cycle->log; ngx_cleaner_event.data = &dumb; dumb.fd = (ngx_socket_t) -1; } ngx_temp_pool->log = cycle->log; old = ngx_push_array(&ngx_old_cycles); if (old == NULL) { exit(1); } *old = old_cycle; if (!ngx_cleaner_event.timer_set) { ngx_add_timer(&ngx_cleaner_event, 30000); ngx_cleaner_event.timer_set = 1; } return cycle; } #if !(WIN32) ngx_int_t ngx_create_pidfile(ngx_cycle_t *cycle, ngx_cycle_t *old_cycle) { ngx_uint_t trunc; size_t len; u_char *name, pid[NGX_INT64_LEN + 1]; ngx_file_t file; ngx_core_conf_t *ccf, *old_ccf; if (!ngx_test_config && old_cycle && old_cycle->conf_ctx == NULL) { /* * do not create the pid file in the first ngx_init_cycle() call * because we need to write the demonized process pid */ return NGX_OK; } ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module); if (!ngx_test_config && old_cycle) { old_ccf = (ngx_core_conf_t *) ngx_get_conf(old_cycle->conf_ctx, ngx_core_module); if (ccf->pid.len == old_ccf->pid.len && ngx_strcmp(ccf->pid.data, old_ccf->pid.data) == 0) { return NGX_OK; } } len = ngx_snprintf((char *) pid, NGX_INT64_LEN + 1, PID_T_FMT, ngx_pid); ngx_memzero(&file, sizeof(ngx_file_t)); file.name = (ngx_inherited && getppid() > 1) ? ccf->newpid : ccf->pid; file.log = cycle->log; trunc = ngx_test_config ? 0: NGX_FILE_TRUNCATE; file.fd = ngx_open_file(file.name.data, NGX_FILE_RDWR, NGX_FILE_CREATE_OR_OPEN|trunc); if (file.fd == NGX_INVALID_FILE) { ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, ngx_open_file_n " \"%s\" failed", file.name.data); return NGX_ERROR; } if (!ngx_test_config) { if (ngx_write_file(&file, pid, len, 0) == NGX_ERROR) { return NGX_ERROR; } } if (ngx_close_file(file.fd) == NGX_FILE_ERROR) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, ngx_close_file_n " \"%s\" failed", file.name.data); } ngx_delete_pidfile(old_cycle); return NGX_OK; } void ngx_delete_pidfile(ngx_cycle_t *cycle) { u_char *name; ngx_core_conf_t *ccf; if (cycle == NULL || cycle->conf_ctx == NULL) { return; } ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module); if (ngx_inherited && getppid() > 1) { name = ccf->newpid.data; } else { name = ccf->pid.data; } if (ngx_delete_file(name) == NGX_FILE_ERROR) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, ngx_delete_file_n " \"%s\" failed", name); } } #endif void ngx_reopen_files(ngx_cycle_t *cycle, ngx_uid_t user) { ngx_fd_t fd; ngx_uint_t i; ngx_open_file_t *file; file = cycle->open_files.elts; for (i = 0; i < cycle->open_files.nelts; i++) { if (file[i].name.data == NULL) { continue; } fd = ngx_open_file(file[i].name.data, NGX_FILE_RDWR, NGX_FILE_CREATE_OR_OPEN|NGX_FILE_APPEND); ngx_log_debug3(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "reopen file \"%s\", old:%d new:%d", file[i].name.data, file[i].fd, fd); if (fd == NGX_INVALID_FILE) { ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, ngx_open_file_n " \"%s\" failed", file[i].name.data); continue; } #if (WIN32) if (ngx_file_append_mode(fd) == NGX_ERROR) { ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, ngx_file_append_mode_n " \"%s\" failed", file[i].name.data); if (ngx_close_file(fd) == NGX_FILE_ERROR) { ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, ngx_close_file_n " \"%s\" failed", file[i].name.data); } continue; } #else if (user != (ngx_uid_t) -1) { if (chown((const char *) file[i].name.data, user, -1) == -1) { ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, "chown \"%s\" failed", file[i].name.data); if (ngx_close_file(fd) == NGX_FILE_ERROR) { ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, ngx_close_file_n " \"%s\" failed", file[i].name.data); } } } if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1) { ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, "fcntl(FD_CLOEXEC) \"%s\" failed", file[i].name.data); if (ngx_close_file(fd) == NGX_FILE_ERROR) { ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, ngx_close_file_n " \"%s\" failed", file[i].name.data); } continue; } #endif if (ngx_close_file(file[i].fd) == NGX_FILE_ERROR) { ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, ngx_close_file_n " \"%s\" failed", file[i].name.data); } file[i].fd = fd; } #if !(WIN32) if (dup2(cycle->log->file->fd, STDERR_FILENO) == -1) { ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, "dup2(STDERR) failed"); } #endif } static void ngx_clean_old_cycles(ngx_event_t *ev) { ngx_uint_t i, n, found, live; ngx_log_t *log; ngx_cycle_t **cycle; log = ngx_cycle->log; ngx_temp_pool->log = log; ngx_log_debug0(NGX_LOG_DEBUG_CORE, log, 0, "clean old cycles"); live = 0; cycle = ngx_old_cycles.elts; for (i = 0; i < ngx_old_cycles.nelts; i++) { if (cycle[i] == NULL) { continue; } found = 0; for (n = 0; n < cycle[i]->connection_n; n++) { if (cycle[i]->connections[n].fd != (ngx_socket_t) -1) { found = 1; ngx_log_debug1(NGX_LOG_DEBUG_CORE, log, 0, "live fd:%d", n); break; } } if (found) { live = 1; continue; } ngx_log_debug1(NGX_LOG_DEBUG_CORE, log, 0, "clean old cycle: %d", i); ngx_destroy_pool(cycle[i]->pool); cycle[i] = NULL; } ngx_log_debug1(NGX_LOG_DEBUG_CORE, log, 0, "old cycles status: %d", live); if (live) { ngx_add_timer(ev, 30000); } else { ngx_destroy_pool(ngx_temp_pool); ngx_temp_pool = NULL; ngx_old_cycles.nelts = 0; } }