diff options
Diffstat (limited to 'src/nxt_process.c')
| -rw-r--r-- | src/nxt_process.c | 534 |
1 files changed, 374 insertions, 160 deletions
diff --git a/src/nxt_process.c b/src/nxt_process.c index f5959edf..e84549b3 100644 --- a/src/nxt_process.c +++ b/src/nxt_process.c @@ -13,9 +13,18 @@ #include <signal.h> -static void nxt_process_start(nxt_task_t *task, nxt_process_t *process); -static nxt_int_t nxt_process_worker_setup(nxt_task_t *task, - nxt_process_t *process, int parentfd); +static nxt_int_t nxt_process_setup(nxt_task_t *task, nxt_process_t *process); +static nxt_int_t nxt_process_child_fixup(nxt_task_t *task, + nxt_process_t *process); +static nxt_int_t nxt_process_send_created(nxt_task_t *task, + nxt_process_t *process); +static nxt_int_t nxt_process_send_ready(nxt_task_t *task, + nxt_process_t *process); +static void nxt_process_created_ok(nxt_task_t *task, nxt_port_recv_msg_t *msg, + void *data); +static void nxt_process_created_error(nxt_task_t *task, + nxt_port_recv_msg_t *msg, void *data); + /* A cached process pid. */ nxt_pid_t nxt_pid; @@ -47,62 +56,58 @@ nxt_bool_t nxt_proc_remove_notify_matrix[NXT_PROCESS_MAX][NXT_PROCESS_MAX] = { static nxt_int_t -nxt_process_worker_setup(nxt_task_t *task, nxt_process_t *process, int parentfd) +nxt_process_child_fixup(nxt_task_t *task, nxt_process_t *process) { - pid_t rpid, pid; - ssize_t n; - nxt_int_t parent_status; nxt_process_t *p; nxt_runtime_t *rt; nxt_process_init_t *init; nxt_process_type_t ptype; - pid = getpid(); - rpid = 0; - rt = task->thread->runtime; - init = process->init; + init = nxt_process_init(process); - /* Setup the worker process. */ + nxt_pid = nxt_getpid(); - n = read(parentfd, &rpid, sizeof(rpid)); - if (nxt_slow_path(n == -1 || n != sizeof(rpid))) { - nxt_alert(task, "failed to read real pid"); - return NXT_ERROR; - } - - if (nxt_slow_path(rpid == 0)) { - nxt_alert(task, "failed to get real pid from parent"); - return NXT_ERROR; - } - - nxt_pid = rpid; + process->pid = nxt_pid; /* Clean inherited cached thread tid. */ task->thread->tid = 0; - process->pid = nxt_pid; +#if (NXT_HAVE_CLONE && NXT_HAVE_CLONE_NEWPID) + if (nxt_is_clone_flag_set(process->isolation.clone.flags, NEWPID)) { + ssize_t pidsz; + char procpid[10]; - if (nxt_pid != pid) { - nxt_debug(task, "app \"%s\" real pid %d", init->name, nxt_pid); - nxt_debug(task, "app \"%s\" isolated pid: %d", init->name, pid); - } + nxt_debug(task, "%s isolated pid is %d", process->name, nxt_pid); - n = read(parentfd, &parent_status, sizeof(parent_status)); - if (nxt_slow_path(n == -1 || n != sizeof(parent_status))) { - nxt_alert(task, "failed to read parent status"); - return NXT_ERROR; - } + pidsz = readlink("/proc/self", procpid, sizeof(procpid)); + + if (nxt_slow_path(pidsz < 0 || pidsz >= (ssize_t) sizeof(procpid))) { + nxt_alert(task, "failed to read real pid from /proc/self"); + return NXT_ERROR; + } + + procpid[pidsz] = '\0'; + + nxt_pid = (nxt_pid_t) strtol(procpid, NULL, 10); + + nxt_assert(nxt_pid > 0 && nxt_errno != ERANGE); - if (nxt_slow_path(parent_status != NXT_OK)) { - return parent_status; + process->pid = nxt_pid; + task->thread->tid = nxt_pid; + + nxt_debug(task, "%s real pid is %d", process->name, nxt_pid); } +#endif + ptype = init->type; nxt_port_reset_next_id(); nxt_event_engine_thread_adopt(task->thread->engine); + rt = task->thread->runtime; + /* Remove not ready processes. */ nxt_runtime_process_each(rt, p) { @@ -114,7 +119,7 @@ nxt_process_worker_setup(nxt_task_t *task, nxt_process_t *process, int parentfd) continue; } - if (!p->ready) { + if (p->state != NXT_PROCESS_STATE_READY) { nxt_debug(task, "remove not ready process %PI", p->pid); nxt_process_close_ports(task, p); @@ -127,12 +132,6 @@ nxt_process_worker_setup(nxt_task_t *task, nxt_process_t *process, int parentfd) } nxt_runtime_process_loop; - nxt_runtime_process_add(task, process); - - nxt_process_start(task, process); - - process->ready = 1; - return NXT_OK; } @@ -140,48 +139,36 @@ nxt_process_worker_setup(nxt_task_t *task, nxt_process_t *process, int parentfd) nxt_pid_t nxt_process_create(nxt_task_t *task, nxt_process_t *process) { - int pipefd[2]; nxt_int_t ret; nxt_pid_t pid; - nxt_process_init_t *init; - - if (nxt_slow_path(pipe(pipefd) == -1)) { - nxt_alert(task, "failed to create process pipe for passing rpid"); - return -1; - } - - init = process->init; #if (NXT_HAVE_CLONE) - pid = nxt_clone(SIGCHLD | init->isolation.clone.flags); + pid = nxt_clone(SIGCHLD | process->isolation.clone.flags); if (nxt_slow_path(pid < 0)) { - nxt_alert(task, "clone() failed while creating \"%s\" %E", - init->name, nxt_errno); - goto cleanup; + nxt_alert(task, "clone() failed for %s %E", process->name, nxt_errno); + return pid; } #else pid = fork(); if (nxt_slow_path(pid < 0)) { - nxt_alert(task, "fork() failed while creating \"%s\" %E", - init->name, nxt_errno); - goto cleanup; + nxt_alert(task, "fork() failed for %s %E", process->name, nxt_errno); + return pid; } #endif if (pid == 0) { /* Child. */ - if (nxt_slow_path(close(pipefd[1]) == -1)) { - nxt_alert(task, "failed to close writer pipe fd"); - } - - ret = nxt_process_worker_setup(task, process, pipefd[0]); + ret = nxt_process_child_fixup(task, process); if (nxt_slow_path(ret != NXT_OK)) { - exit(1); + nxt_process_quit(task, 1); + return -1; } - if (nxt_slow_path(close(pipefd[0]) == -1)) { - nxt_alert(task, "failed to close writer pipe fd"); + nxt_runtime_process_add(task, process); + + if (nxt_slow_path(nxt_process_setup(task, process) != NXT_OK)) { + nxt_process_quit(task, 1); } /* @@ -193,78 +180,24 @@ nxt_process_create(nxt_task_t *task, nxt_process_t *process) /* Parent. */ - /* - * At this point, the child process is blocked reading the - * pipe fd to get its real pid (rpid). - * - * If anything goes wrong now, we need to terminate the child - * process by sending a NXT_ERROR in the pipe. - */ - #if (NXT_HAVE_CLONE) - nxt_debug(task, "clone(\"%s\"): %PI", init->name, pid); + nxt_debug(task, "clone(%s): %PI", process->name, pid); #else - nxt_debug(task, "fork(\"%s\"): %PI", init->name, pid); + nxt_debug(task, "fork(%s): %PI", process->name, pid); #endif - if (nxt_slow_path(write(pipefd[1], &pid, sizeof(pid)) == -1)) { - nxt_alert(task, "failed to write real pid"); - goto fail; - } - -#if (NXT_HAVE_CLONE && NXT_HAVE_CLONE_NEWUSER) - if (NXT_CLONE_USER(init->isolation.clone.flags)) { - ret = nxt_clone_credential_map(task, pid, init->user_cred, - &init->isolation.clone); - if (nxt_slow_path(ret != NXT_OK)) { - goto fail; - } - } -#endif - - ret = NXT_OK; - - if (nxt_slow_path(write(pipefd[1], &ret, sizeof(ret)) == -1)) { - nxt_alert(task, "failed to write status"); - goto fail; - } - process->pid = pid; nxt_runtime_process_add(task, process); - goto cleanup; - -fail: - - ret = NXT_ERROR; - - if (nxt_slow_path(write(pipefd[1], &ret, sizeof(ret)) == -1)) { - nxt_alert(task, "failed to write status"); - } - - waitpid(pid, NULL, 0); - - pid = -1; - -cleanup: - - if (nxt_slow_path(close(pipefd[0]) != 0)) { - nxt_alert(task, "failed to close pipe: %E", nxt_errno); - } - - if (nxt_slow_path(close(pipefd[1]) != 0)) { - nxt_alert(task, "failed to close pipe: %E", nxt_errno); - } - return pid; } -static void -nxt_process_start(nxt_task_t *task, nxt_process_t *process) +static nxt_int_t +nxt_process_setup(nxt_task_t *task, nxt_process_t *process) { - nxt_int_t ret, cap_setid; + nxt_int_t ret; nxt_port_t *port, *main_port; nxt_thread_t *thread; nxt_runtime_t *rt; @@ -272,37 +205,17 @@ nxt_process_start(nxt_task_t *task, nxt_process_t *process) nxt_event_engine_t *engine; const nxt_event_interface_t *interface; - init = process->init; + init = nxt_process_init(process); - nxt_log(task, NXT_LOG_INFO, "%s started", init->name); + nxt_debug(task, "%s setup", process->name); - nxt_process_title(task, "unit: %s", init->name); + nxt_process_title(task, "unit: %s", process->name); thread = task->thread; rt = thread->runtime; nxt_random_init(&thread->random); - cap_setid = rt->capabilities.setid; - -#if (NXT_HAVE_CLONE_NEWUSER) - if (!cap_setid && NXT_CLONE_USER(init->isolation.clone.flags)) { - cap_setid = 1; - } -#endif - - if (cap_setid) { - ret = nxt_credential_setgids(task, init->user_cred); - if (nxt_slow_path(ret != NXT_OK)) { - goto fail; - } - - ret = nxt_credential_setuid(task, init->user_cred); - if (nxt_slow_path(ret != NXT_OK)) { - goto fail; - } - } - rt->type = init->type; engine = thread->engine; @@ -312,17 +225,17 @@ nxt_process_start(nxt_task_t *task, nxt_process_t *process) interface = nxt_service_get(rt->services, "engine", rt->engine); if (nxt_slow_path(interface == NULL)) { - goto fail; + return NXT_ERROR; } if (nxt_event_engine_change(engine, interface, rt->batch) != NXT_OK) { - goto fail; + return NXT_ERROR; } ret = nxt_runtime_thread_pool_create(thread, rt, rt->auxiliary_threads, 60000 * 1000000LL); if (nxt_slow_path(ret != NXT_OK)) { - goto fail; + return NXT_ERROR; } main_port = rt->port_by_type[NXT_PROCESS_MAIN]; @@ -334,28 +247,282 @@ nxt_process_start(nxt_task_t *task, nxt_process_t *process) nxt_port_write_close(port); - ret = init->start(task, init->data); + nxt_port_enable(task, port, init->port_handlers); + + ret = init->setup(task, process); if (nxt_slow_path(ret != NXT_OK)) { - goto fail; + return NXT_ERROR; } - nxt_port_enable(task, port, init->port_handlers); + switch (process->state) { - ret = nxt_port_socket_write(task, main_port, NXT_PORT_MSG_PROCESS_READY, - -1, init->stream, 0, NULL); + case NXT_PROCESS_STATE_CREATED: + ret = nxt_process_send_created(task, process); + break; + + case NXT_PROCESS_STATE_READY: + ret = nxt_process_send_ready(task, process); + + if (nxt_slow_path(ret != NXT_OK)) { + break; + } + + ret = init->start(task, &process->data); + break; + + default: + nxt_assert(0); + } if (nxt_slow_path(ret != NXT_OK)) { - nxt_log(task, NXT_LOG_ERR, "failed to send READY message to main"); + nxt_alert(task, "%s failed to start", process->name); + } + + return ret; +} + +static nxt_int_t +nxt_process_send_created(nxt_task_t *task, nxt_process_t *process) +{ + uint32_t stream; + nxt_int_t ret; + nxt_port_t *my_port, *main_port; + nxt_runtime_t *rt; + + nxt_assert(process->state == NXT_PROCESS_STATE_CREATED); + + rt = task->thread->runtime; + + my_port = nxt_process_port_first(process); + main_port = rt->port_by_type[NXT_PROCESS_MAIN]; + + nxt_assert(my_port != NULL && main_port != NULL); + + stream = nxt_port_rpc_register_handler(task, my_port, + nxt_process_created_ok, + nxt_process_created_error, + main_port->pid, process); + + if (nxt_slow_path(stream == 0)) { + return NXT_ERROR; + } + + ret = nxt_port_socket_write(task, main_port, NXT_PORT_MSG_PROCESS_CREATED, + -1, stream, my_port->id, NULL); + + if (nxt_slow_path(ret != NXT_OK)) { + nxt_alert(task, "%s failed to send CREATED message", process->name); + nxt_port_rpc_cancel(task, my_port, stream); + return NXT_ERROR; + } + + nxt_debug(task, "%s created", process->name); + + return NXT_OK; +} + + +static void +nxt_process_created_ok(nxt_task_t *task, nxt_port_recv_msg_t *msg, void *data) +{ + nxt_int_t ret; + nxt_process_t *process; + nxt_process_init_t *init; + + process = data; + init = nxt_process_init(process); + + ret = nxt_process_apply_creds(task, process); + if (nxt_slow_path(ret != NXT_OK)) { goto fail; } - return; + nxt_log(task, NXT_LOG_INFO, "%s started", process->name); + + ret = init->start(task, &process->data); fail: - exit(1); + nxt_process_quit(task, ret == NXT_OK ? 0 : 1); +} + + +static void +nxt_process_created_error(nxt_task_t *task, nxt_port_recv_msg_t *msg, + void *data) +{ + nxt_process_t *process; + nxt_process_init_t *init; + + process = data; + init = nxt_process_init(process); + + nxt_alert(task, "%s failed to start", init->name); + + nxt_process_quit(task, 1); +} + + +nxt_int_t +nxt_process_core_setup(nxt_task_t *task, nxt_process_t *process) +{ + nxt_int_t ret; + + ret = nxt_process_apply_creds(task, process); + if (nxt_slow_path(ret != NXT_OK)) { + return NXT_ERROR; + } + + process->state = NXT_PROCESS_STATE_READY; + + return NXT_OK; +} + + +#if (NXT_HAVE_CLONE_NEWUSER) + +nxt_int_t +nxt_process_vldt_isolation_creds(nxt_task_t *task, nxt_process_t *process) +{ + nxt_int_t ret; + nxt_clone_t *clone; + nxt_credential_t *creds; + + clone = &process->isolation.clone; + creds = process->user_cred; + + if (clone->uidmap.size == 0 && clone->gidmap.size == 0) { + return NXT_OK; + } + + if (!nxt_is_clone_flag_set(clone->flags, NEWUSER)) { + if (nxt_slow_path(clone->uidmap.size > 0)) { + nxt_log(task, NXT_LOG_ERR, "\"uidmap\" is set but " + "\"isolation.namespaces.credential\" is false or unset"); + + return NXT_ERROR; + } + + if (nxt_slow_path(clone->gidmap.size > 0)) { + nxt_log(task, NXT_LOG_ERR, "\"gidmap\" is set but " + "\"isolation.namespaces.credential\" is false or unset"); + + return NXT_ERROR; + } + + return NXT_OK; + } + + ret = nxt_clone_vldt_credential_uidmap(task, &clone->uidmap, creds); + if (nxt_slow_path(ret != NXT_OK)) { + return NXT_ERROR; + } + + return nxt_clone_vldt_credential_gidmap(task, &clone->gidmap, creds); +} + +#endif + + +nxt_int_t +nxt_process_creds_set(nxt_task_t *task, nxt_process_t *process, nxt_str_t *user, + nxt_str_t *group) +{ + char *str; + + process->user_cred = nxt_mp_zalloc(process->mem_pool, + sizeof(nxt_credential_t)); + + if (nxt_slow_path(process->user_cred == NULL)) { + return NXT_ERROR; + } + + str = nxt_mp_zalloc(process->mem_pool, user->length + 1); + if (nxt_slow_path(str == NULL)) { + return NXT_ERROR; + } + + nxt_memcpy(str, user->start, user->length); + str[user->length] = '\0'; + + process->user_cred->user = str; + + if (group->start != NULL) { + str = nxt_mp_zalloc(process->mem_pool, group->length + 1); + if (nxt_slow_path(str == NULL)) { + return NXT_ERROR; + } + + nxt_memcpy(str, group->start, group->length); + str[group->length] = '\0'; + + } else { + str = NULL; + } + + return nxt_credential_get(task, process->mem_pool, process->user_cred, str); +} + + +nxt_int_t +nxt_process_apply_creds(nxt_task_t *task, nxt_process_t *process) +{ + nxt_int_t ret, cap_setid; + nxt_runtime_t *rt; + + rt = task->thread->runtime; + + cap_setid = rt->capabilities.setid; + +#if (NXT_HAVE_CLONE && NXT_HAVE_CLONE_NEWUSER) + if (!cap_setid + && nxt_is_clone_flag_set(process->isolation.clone.flags, NEWUSER)) { + cap_setid = 1; + } +#endif + + if (cap_setid) { + ret = nxt_credential_setgids(task, process->user_cred); + if (nxt_slow_path(ret != NXT_OK)) { + return NXT_ERROR; + } + + ret = nxt_credential_setuid(task, process->user_cred); + if (nxt_slow_path(ret != NXT_OK)) { + return NXT_ERROR; + } + } + + return NXT_OK; +} + + +static nxt_int_t +nxt_process_send_ready(nxt_task_t *task, nxt_process_t *process) +{ + nxt_int_t ret; + nxt_port_t *main_port; + nxt_runtime_t *rt; + + rt = task->thread->runtime; + + main_port = rt->port_by_type[NXT_PROCESS_MAIN]; + + nxt_assert(main_port != NULL); + + ret = nxt_port_socket_write(task, main_port, NXT_PORT_MSG_PROCESS_READY, + -1, process->stream, 0, NULL); + + if (nxt_slow_path(ret != NXT_OK)) { + nxt_alert(task, "%s failed to send READY message", process->name); + return NXT_ERROR; + } + + nxt_debug(task, "%s sent ready", process->name); + + return NXT_OK; } @@ -625,3 +792,50 @@ nxt_process_connected_port_find(nxt_process_t *process, nxt_port_t *port) return res; } + + +void +nxt_process_quit(nxt_task_t *task, nxt_uint_t exit_status) +{ + nxt_uint_t n; + nxt_queue_t *listen; + nxt_runtime_t *rt; + nxt_queue_link_t *link, *next; + nxt_listen_event_t *lev; + nxt_listen_socket_t *ls; + + rt = task->thread->runtime; + + nxt_debug(task, "close listen connections"); + + listen = &task->thread->engine->listen_connections; + + for (link = nxt_queue_first(listen); + link != nxt_queue_tail(listen); + link = next) + { + next = nxt_queue_next(link); + lev = nxt_queue_link_data(link, nxt_listen_event_t, link); + nxt_queue_remove(link); + + nxt_fd_event_close(task->thread->engine, &lev->socket); + } + + if (rt->listen_sockets != NULL) { + + ls = rt->listen_sockets->elts; + n = rt->listen_sockets->nelts; + + while (n != 0) { + nxt_socket_close(task, ls->socket); + ls->socket = -1; + + ls++; + n--; + } + + rt->listen_sockets->nelts = 0; + } + + nxt_runtime_quit(task, exit_status); +} |