From 916f95cb58604038695347ee41a430d8ca1f0556 Mon Sep 17 00:00:00 2001 From: John Crispin Date: Thu, 14 Nov 2013 13:41:13 +0100 Subject: debloat and reorganize code split app into procd and init binaries remove log support, this is an external service now Signed-off-by: John Crispin --- instance.c | 491 ------------------------------------------------------------- 1 file changed, 491 deletions(-) delete mode 100644 instance.c (limited to 'instance.c') diff --git a/instance.c b/instance.c deleted file mode 100644 index 05b0f99..0000000 --- a/instance.c +++ /dev/null @@ -1,491 +0,0 @@ -/* - * Copyright (C) 2013 Felix Fietkau - * Copyright (C) 2013 John Crispin - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 - * as published by the Free Software Foundation - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ - -#include -#include -#include -#include -#include -#include -#include - -#include "procd.h" -#include "service.h" -#include "instance.h" -#include "md5.h" - -enum { - INSTANCE_ATTR_COMMAND, - INSTANCE_ATTR_ENV, - INSTANCE_ATTR_DATA, - INSTANCE_ATTR_NETDEV, - INSTANCE_ATTR_FILE, - INSTANCE_ATTR_TRIGGER, - INSTANCE_ATTR_RESPAWN, - INSTANCE_ATTR_NICE, - __INSTANCE_ATTR_MAX -}; - -static const struct blobmsg_policy instance_attr[__INSTANCE_ATTR_MAX] = { - [INSTANCE_ATTR_COMMAND] = { "command", BLOBMSG_TYPE_ARRAY }, - [INSTANCE_ATTR_ENV] = { "env", BLOBMSG_TYPE_TABLE }, - [INSTANCE_ATTR_DATA] = { "data", BLOBMSG_TYPE_TABLE }, - [INSTANCE_ATTR_NETDEV] = { "netdev", BLOBMSG_TYPE_ARRAY }, - [INSTANCE_ATTR_FILE] = { "file", BLOBMSG_TYPE_ARRAY }, - [INSTANCE_ATTR_TRIGGER] = { "triggers", BLOBMSG_TYPE_ARRAY }, - [INSTANCE_ATTR_RESPAWN] = { "respawn", BLOBMSG_TYPE_ARRAY }, - [INSTANCE_ATTR_NICE] = { "nice", BLOBMSG_TYPE_INT32 }, -}; - -struct instance_netdev { - struct blobmsg_list_node node; - int ifindex; -}; - -struct instance_file { - struct blobmsg_list_node node; - uint32_t md5[4]; -}; - -static void -instance_run(struct service_instance *in) -{ - struct blobmsg_list_node *var; - struct blob_attr *cur; - char **argv; - int argc = 1; /* NULL terminated */ - int rem, fd; - - if (in->nice) - setpriority(PRIO_PROCESS, 0, in->nice); - - blobmsg_for_each_attr(cur, in->command, rem) - argc++; - - blobmsg_list_for_each(&in->env, var) - setenv(blobmsg_name(var->data), blobmsg_data(var->data), 1); - - argv = alloca(sizeof(char *) * argc); - argc = 0; - - blobmsg_for_each_attr(cur, in->command, rem) - argv[argc++] = blobmsg_data(cur); - - argv[argc] = NULL; - fd = open("/dev/null", O_RDWR); - if (fd > -1) { - dup2(fd, STDIN_FILENO); - dup2(fd, STDOUT_FILENO); - dup2(fd, STDERR_FILENO); - if (fd > STDERR_FILENO) - close(fd); - } - execvp(argv[0], argv); - exit(127); -} - -void -instance_start(struct service_instance *in) -{ - int pid; - - if (in->proc.pending) - return; - - in->restart = false; - in->halt = !in->respawn; - - if (!in->valid) - return; - - pid = fork(); - if (pid < 0) - return; - - if (!pid) { - uloop_done(); - instance_run(in); - return; - } - - DEBUG(1, "Started instance %s::%s\n", in->srv->name, in->name); - in->proc.pid = pid; - clock_gettime(CLOCK_MONOTONIC, &in->start); - uloop_process_add(&in->proc); -} - -static void -instance_timeout(struct uloop_timeout *t) -{ - struct service_instance *in; - - in = container_of(t, struct service_instance, timeout); - - if (!in->halt && (in->restart || in->respawn)) - instance_start(in); -} - -static void -instance_exit(struct uloop_process *p, int ret) -{ - struct service_instance *in; - struct timespec tp; - long runtime; - - in = container_of(p, struct service_instance, proc); - - clock_gettime(CLOCK_MONOTONIC, &tp); - runtime = tp.tv_sec - in->start.tv_sec; - - DEBUG(1, "Instance %s::%s exit with error code %d after %ld seconds\n", in->srv->name, in->name, ret, runtime); - if (upgrade_running) - return; - - uloop_timeout_cancel(&in->timeout); - if (in->halt) { - /* no action */ - } else if (in->restart) { - instance_start(in); - } else if (in->respawn) { - if (runtime < in->respawn_threshold) - in->respawn_count++; - else - in->respawn_count = 0; - if (in->respawn_count > in->respawn_retry) { - LOG("Instance %s::%s s in a crash loop %d crashes, %ld seconds since last crash\n", - in->srv->name, in->name, in->respawn_count, runtime); - in->restart = in->respawn = 0; - in->halt = 1; - } else { - uloop_timeout_set(&in->timeout, in->respawn_timeout * 1000); - } - } -} - -void -instance_stop(struct service_instance *in) -{ - if (!in->proc.pending) - return; - in->halt = true; - in->restart = in->respawn = false; - kill(in->proc.pid, SIGTERM); -} - -static void -instance_restart(struct service_instance *in) -{ - if (!in->proc.pending) - return; - in->halt = false; - in->restart = true; - kill(in->proc.pid, SIGTERM); -} - -static bool -instance_config_changed(struct service_instance *in, struct service_instance *in_new) -{ - if (!in->valid) - return true; - - if (!blob_attr_equal(in->command, in_new->command)) - return true; - - if (!blobmsg_list_equal(&in->env, &in_new->env)) - return true; - - if (!blobmsg_list_equal(&in->data, &in_new->data)) - return true; - - if (!blobmsg_list_equal(&in->netdev, &in_new->netdev)) - return true; - - if (!blobmsg_list_equal(&in->file, &in_new->file)) - return true; - - if (in->nice != in_new->nice) - return true; - - return false; -} - -static bool -instance_netdev_cmp(struct blobmsg_list_node *l1, struct blobmsg_list_node *l2) -{ - struct instance_netdev *n1 = container_of(l1, struct instance_netdev, node); - struct instance_netdev *n2 = container_of(l2, struct instance_netdev, node); - - return n1->ifindex == n2->ifindex; -} - -static void -instance_netdev_update(struct blobmsg_list_node *l) -{ - struct instance_netdev *n = container_of(l, struct instance_netdev, node); - - n->ifindex = if_nametoindex(n->node.avl.key); -} - -static bool -instance_file_cmp(struct blobmsg_list_node *l1, struct blobmsg_list_node *l2) -{ - struct instance_file *f1 = container_of(l1, struct instance_file, node); - struct instance_file *f2 = container_of(l2, struct instance_file, node); - - return !memcmp(f1->md5, f2->md5, sizeof(f1->md5)); -} - -static void -instance_file_update(struct blobmsg_list_node *l) -{ - struct instance_file *f = container_of(l, struct instance_file, node); - md5_ctx_t md5; - char buf[256]; - int len, fd; - - memset(f->md5, 0, sizeof(f->md5)); - - fd = open(l->avl.key, O_RDONLY); - if (fd < 0) - return; - - md5_begin(&md5); - do { - len = read(fd, buf, sizeof(buf)); - if (len < 0) { - if (errno == EINTR) - continue; - - break; - } - if (!len) - break; - - md5_hash(buf, len, &md5); - } while(1); - - md5_end(f->md5, &md5); - close(fd); -} - -static bool -instance_fill_array(struct blobmsg_list *l, struct blob_attr *cur, blobmsg_update_cb cb, bool array) -{ - struct blobmsg_list_node *node; - - if (!cur) - return true; - - if (!blobmsg_check_attr_list(cur, BLOBMSG_TYPE_STRING)) - return false; - - blobmsg_list_fill(l, blobmsg_data(cur), blobmsg_data_len(cur), array); - if (cb) { - blobmsg_list_for_each(l, node) - cb(node); - } - return true; -} - -static bool -instance_config_parse(struct service_instance *in) -{ - struct blob_attr *tb[__INSTANCE_ATTR_MAX]; - struct blob_attr *cur, *cur2; - int argc = 0; - int rem; - - blobmsg_parse(instance_attr, __INSTANCE_ATTR_MAX, tb, - blobmsg_data(in->config), blobmsg_data_len(in->config)); - - cur = tb[INSTANCE_ATTR_COMMAND]; - if (!cur) - return false; - - if (!blobmsg_check_attr_list(cur, BLOBMSG_TYPE_STRING)) - return false; - - blobmsg_for_each_attr(cur2, cur, rem) { - argc++; - break; - } - if (!argc) - return false; - - in->command = cur; - - if (tb[INSTANCE_ATTR_RESPAWN]) { - int i = 0; - uint32_t vals[3] = { 3600, 5, 5}; - - blobmsg_for_each_attr(cur2, tb[INSTANCE_ATTR_RESPAWN], rem) { - if ((i >= 3) && (blobmsg_type(cur2) == BLOBMSG_TYPE_STRING)) - continue; - vals[i] = atoi(blobmsg_get_string(cur2)); - i++; - } - in->respawn = true; - in->respawn_count = 0; - in->respawn_threshold = vals[0]; - in->respawn_timeout = vals[1]; - in->respawn_retry = vals[2]; - } - if (tb[INSTANCE_ATTR_TRIGGER]) { - in->trigger = malloc(blob_pad_len(tb[INSTANCE_ATTR_TRIGGER])); - if (!in->trigger) - return -1; - memcpy(in->trigger, tb[INSTANCE_ATTR_TRIGGER], blob_pad_len(tb[INSTANCE_ATTR_TRIGGER])); - trigger_add(in->trigger, in); - } - - if ((cur = tb[INSTANCE_ATTR_NICE])) { - in->nice = (int8_t) blobmsg_get_u32(cur); - if (in->nice < -20 || in->nice > 20) - return false; - } - - if (!instance_fill_array(&in->env, tb[INSTANCE_ATTR_ENV], NULL, false)) - return false; - - if (!instance_fill_array(&in->data, tb[INSTANCE_ATTR_DATA], NULL, false)) - return false; - - if (!instance_fill_array(&in->netdev, tb[INSTANCE_ATTR_NETDEV], instance_netdev_update, true)) - return false; - - if (!instance_fill_array(&in->file, tb[INSTANCE_ATTR_FILE], instance_file_update, true)) - return false; - - return true; -} - -static void -instance_config_cleanup(struct service_instance *in) -{ - blobmsg_list_free(&in->env); - blobmsg_list_free(&in->data); - blobmsg_list_free(&in->netdev); -} - -static void -instance_config_move(struct service_instance *in, struct service_instance *in_src) -{ - instance_config_cleanup(in); - blobmsg_list_move(&in->env, &in_src->env); - blobmsg_list_move(&in->data, &in_src->data); - blobmsg_list_move(&in->netdev, &in_src->netdev); - in->trigger = in_src->trigger; - in->command = in_src->command; - in->name = in_src->name; - in->node.avl.key = in_src->node.avl.key; - - free(in->config); - in->config = in_src->config; - in_src->config = NULL; -} - -bool -instance_update(struct service_instance *in, struct service_instance *in_new) -{ - bool changed = instance_config_changed(in, in_new); - bool running = in->proc.pending; - - if (!changed && running) - return false; - - if (!running) { - if (changed) - instance_config_move(in, in_new); - instance_start(in); - } else { - instance_restart(in); - instance_config_move(in, in_new); - /* restart happens in the child callback handler */ - } - return true; -} - -void -instance_free(struct service_instance *in) -{ - uloop_process_delete(&in->proc); - uloop_timeout_cancel(&in->timeout); - trigger_del(in); - free(in->trigger); - instance_config_cleanup(in); - free(in->config); - free(in); -} - -void -instance_init(struct service_instance *in, struct service *s, struct blob_attr *config) -{ - config = blob_memdup(config); - in->srv = s; - in->name = blobmsg_name(config); - in->config = config; - in->timeout.cb = instance_timeout; - in->proc.cb = instance_exit; - - blobmsg_list_init(&in->netdev, struct instance_netdev, node, instance_netdev_cmp); - blobmsg_list_init(&in->file, struct instance_file, node, instance_file_cmp); - blobmsg_list_simple_init(&in->env); - blobmsg_list_simple_init(&in->data); - in->valid = instance_config_parse(in); -} - -void instance_dump(struct blob_buf *b, struct service_instance *in, int verbose) -{ - void *i; - struct pid_info pi; - - i = blobmsg_open_table(b, in->name); - blobmsg_add_u8(b, "running", in->proc.pending); - if (in->proc.pending) - blobmsg_add_u32(b, "pid", in->proc.pid); - blobmsg_add_blob(b, in->command); - - if (!avl_is_empty(&in->env.avl)) { - struct blobmsg_list_node *var; - void *e = blobmsg_open_table(b, "env"); - blobmsg_list_for_each(&in->env, var) - blobmsg_add_string(b, blobmsg_name(var->data), blobmsg_data(var->data)); - blobmsg_close_table(b, e); - } - - if (in->respawn) { - void *r = blobmsg_open_table(b, "respawn"); - blobmsg_add_u32(b, "timeout", in->respawn_timeout); - blobmsg_add_u32(b, "threshold", in->respawn_threshold); - blobmsg_add_u32(b, "retry", in->respawn_retry); - blobmsg_close_table(b, r); - } - - if (verbose && in->trigger) - blobmsg_add_blob(b, in->trigger); - if (!measure_process(in->proc.pid, &pi)) { - struct timespec tp; - long uptime; - - clock_gettime(CLOCK_MONOTONIC, &tp); - uptime = tp.tv_sec - in->start.tv_sec; - - blobmsg_add_u8(b, "ppid", pi.ppid); - blobmsg_add_u16(b, "uid", pi.uid); - blobmsg_add_u32(b, "fdcount", pi.fdcount); - blobmsg_add_u32(b, "vmsize", pi.vmsize); - blobmsg_add_u32(b, "uptime", uptime); - } - blobmsg_close_table(b, i); -} -- cgit v1.2.3