1 files changed, 465 insertions, 0 deletions
diff --git a/src/unitd/service/service.c b/src/unitd/service/service.c
new file mode 100644
index 0000000..a57d470
--- /dev/null
+++ b/src/unitd/service/service.c
@@ -0,0 +1,465 @@
+/*
+ * Copyright (C) 2015 Matthias Schiffer <mschiffer@universe-factory.net>
+ *
+ * Based on "procd" by:
+ * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
+ * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
+ *
+ * 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 <libubox/blobmsg_json.h>
+#include <libubox/avl-cmp.h>
+
+#include "../unitd.h"
+
+#include "service.h"
+#include "instance.h"
+
+struct avl_tree services;
+static struct blob_buf b;
+static struct ubus_context *ctx;
+
+static void
+service_instance_add(struct service *s, struct blob_attr *attr)
+{
+	struct service_instance *in;
+
+	if (blobmsg_type(attr) != BLOBMSG_TYPE_TABLE)
+		return;
+
+	in = calloc(1, sizeof(*in));
+	if (!in)
+		return;
+
+	instance_init(in, s, attr);
+	vlist_add(&s->instances, &in->node, (void *) in->name);
+}
+
+static void
+service_instance_update(struct vlist_tree *tree, struct vlist_node *node_new,
+			struct vlist_node *node_old)
+{
+	struct service_instance *in_o = NULL, *in_n = NULL;
+
+	if (node_old)
+		in_o = container_of(node_old, struct service_instance, node);
+
+	if (node_new)
+		in_n = container_of(node_new, struct service_instance, node);
+
+	if (in_o && in_n) {
+		DEBUG(2, "Update instance %s::%s\n", in_o->srv->name, in_o->name);
+		instance_update(in_o, in_n);
+		instance_free(in_n);
+	} else if (in_o) {
+		DEBUG(2, "Free instance %s::%s\n", in_o->srv->name, in_o->name);
+		instance_stop(in_o);
+		instance_free(in_o);
+	} else if (in_n) {
+		DEBUG(2, "Create instance %s::%s\n", in_n->srv->name, in_n->name);
+		instance_start(in_n);
+	}
+	blob_buf_init(&b, 0);
+}
+
+static struct service *
+service_alloc(const char *name)
+{
+	struct service *s;
+	char *new_name;
+
+	s = calloc_a(sizeof(*s), &new_name, strlen(name) + 1);
+	strcpy(new_name, name);
+
+	vlist_init(&s->instances, avl_strcmp, service_instance_update);
+	s->instances.keep_old = true;
+	s->name = new_name;
+	s->avl.key = s->name;
+
+	return s;
+}
+
+enum {
+	SERVICE_SET_NAME,
+	SERVICE_SET_SCRIPT,
+	SERVICE_SET_INSTANCES,
+	__SERVICE_SET_MAX
+};
+
+static const struct blobmsg_policy service_set_attrs[__SERVICE_SET_MAX] = {
+	[SERVICE_SET_NAME] = { "name", BLOBMSG_TYPE_STRING },
+	[SERVICE_SET_SCRIPT] = { "script", BLOBMSG_TYPE_STRING },
+	[SERVICE_SET_INSTANCES] = { "instances", BLOBMSG_TYPE_TABLE },
+};
+
+static int
+service_update(struct service *s, struct blob_attr **tb, bool add)
+{
+	struct blob_attr *cur;
+	int rem;
+
+	if (tb[SERVICE_SET_INSTANCES]) {
+		if (!add)
+			vlist_update(&s->instances);
+		blobmsg_for_each_attr(cur, tb[SERVICE_SET_INSTANCES], rem) {
+			service_instance_add(s, cur);
+		}
+		if (!add)
+			vlist_flush(&s->instances);
+	}
+
+	return 0;
+}
+
+static void
+service_delete(struct service *s)
+{
+	service_event("service.stop", s->name, NULL);
+	vlist_flush_all(&s->instances);
+	avl_delete(&services, &s->avl);
+	free(s);
+}
+
+enum {
+	SERVICE_ATTR_NAME,
+	__SERVICE_ATTR_MAX,
+};
+
+static const struct blobmsg_policy service_attrs[__SERVICE_ATTR_MAX] = {
+	[SERVICE_ATTR_NAME] = { "name", BLOBMSG_TYPE_STRING },
+};
+
+enum {
+	SERVICE_DEL_ATTR_NAME,
+	SERVICE_DEL_ATTR_INSTANCE,
+	__SERVICE_DEL_ATTR_MAX,
+};
+
+static const struct blobmsg_policy service_del_attrs[__SERVICE_DEL_ATTR_MAX] = {
+	[SERVICE_DEL_ATTR_NAME] = { "name", BLOBMSG_TYPE_STRING },
+	[SERVICE_DEL_ATTR_INSTANCE] = { "instance", BLOBMSG_TYPE_STRING },
+};
+
+enum {
+	SERVICE_LIST_ATTR_NAME,
+	SERVICE_LIST_ATTR_VERBOSE,
+	__SERVICE_LIST_ATTR_MAX,
+};
+
+static const struct blobmsg_policy service_list_attrs[__SERVICE_LIST_ATTR_MAX] = {
+	[SERVICE_LIST_ATTR_NAME] = { "name", BLOBMSG_TYPE_STRING },
+	[SERVICE_LIST_ATTR_VERBOSE] = { "verbose", BLOBMSG_TYPE_BOOL },
+};
+
+enum {
+	EVENT_TYPE,
+	EVENT_DATA,
+	__EVENT_MAX
+};
+
+static const struct blobmsg_policy event_policy[__EVENT_MAX] = {
+	[EVENT_TYPE] = { .name = "type", .type = BLOBMSG_TYPE_STRING },
+	[EVENT_DATA] = { .name = "data", .type = BLOBMSG_TYPE_TABLE },
+};
+
+enum {
+	DATA_NAME,
+	DATA_INSTANCE,
+	DATA_TYPE,
+	__DATA_MAX
+};
+
+static const struct blobmsg_policy get_data_policy[] = {
+	[DATA_NAME] = { "name", BLOBMSG_TYPE_STRING },
+	[DATA_INSTANCE] = { "instance", BLOBMSG_TYPE_STRING },
+	[DATA_TYPE] = { "type", BLOBMSG_TYPE_STRING },
+};
+
+static int
+service_handle_set(struct ubus_context *ctx, struct ubus_object *obj,
+		   struct ubus_request_data *req, const char *method,
+		   struct blob_attr *msg)
+{
+	struct blob_attr *tb[__SERVICE_SET_MAX], *cur;
+	struct service *s = NULL;
+	const char *name;
+	bool add = !strcmp(method, "add");
+	int ret;
+
+	blobmsg_parse(service_set_attrs, __SERVICE_SET_MAX, tb, blob_data(msg), blob_len(msg));
+	cur = tb[SERVICE_ATTR_NAME];
+	if (!cur)
+		return UBUS_STATUS_INVALID_ARGUMENT;
+
+	name = blobmsg_data(cur);
+
+	s = avl_find_element(&services, name, s, avl);
+	if (s) {
+		DEBUG(2, "Update service %s\n", name);
+		return service_update(s, tb, add);
+	}
+
+	DEBUG(2, "Create service %s\n", name);
+	s = service_alloc(name);
+	if (!s)
+		return UBUS_STATUS_UNKNOWN_ERROR;
+
+	ret = service_update(s, tb, add);
+	if (ret)
+		return ret;
+
+	avl_insert(&services, &s->avl);
+
+	service_event("service.start", s->name, NULL);
+
+	return 0;
+}
+
+static void
+service_dump(struct service *s, bool verbose)
+{
+	struct service_instance *in;
+	void *c, *i;
+
+	c = blobmsg_open_table(&b, s->name);
+
+	if (!avl_is_empty(&s->instances.avl)) {
+		i = blobmsg_open_table(&b, "instances");
+		vlist_for_each_element(&s->instances, in, node)
+			instance_dump(&b, in, verbose);
+		blobmsg_close_table(&b, i);
+	}
+	blobmsg_close_table(&b, c);
+}
+
+static int
+service_handle_list(struct ubus_context *ctx, struct ubus_object *obj,
+		    struct ubus_request_data *req, const char *method,
+		    struct blob_attr *msg)
+{
+	struct blob_attr *tb[__SERVICE_LIST_ATTR_MAX];
+	struct service *s;
+	const char *name = NULL;
+	bool verbose = false;
+
+	blobmsg_parse(service_list_attrs, __SERVICE_LIST_ATTR_MAX, tb, blob_data(msg), blob_len(msg));
+
+	if (tb[SERVICE_LIST_ATTR_VERBOSE])
+		verbose = blobmsg_get_bool(tb[SERVICE_LIST_ATTR_VERBOSE]);
+	if (tb[SERVICE_LIST_ATTR_NAME])
+		name = blobmsg_get_string(tb[SERVICE_LIST_ATTR_NAME]);
+
+	blob_buf_init(&b, 0);
+	avl_for_each_element(&services, s, avl) {
+		if (name && strcmp(s->name, name) != 0)
+			continue;
+
+		service_dump(s, verbose);
+	}
+
+	ubus_send_reply(ctx, req, b.head);
+
+	return 0;
+}
+
+static int
+service_handle_delete(struct ubus_context *ctx, struct ubus_object *obj,
+		    struct ubus_request_data *req, const char *method,
+		    struct blob_attr *msg)
+{
+	struct blob_attr *tb[__SERVICE_DEL_ATTR_MAX], *cur;
+	struct service *s;
+	struct service_instance *in;
+
+	blobmsg_parse(service_del_attrs, __SERVICE_DEL_ATTR_MAX, tb, blob_data(msg), blob_len(msg));
+
+	cur = tb[SERVICE_DEL_ATTR_NAME];
+	if (!cur)
+		return UBUS_STATUS_NOT_FOUND;
+
+	s = avl_find_element(&services, blobmsg_data(cur), s, avl);
+	if (!s)
+		return UBUS_STATUS_NOT_FOUND;
+
+	cur = tb[SERVICE_DEL_ATTR_INSTANCE];
+	if (!cur) {
+		service_delete(s);
+		return 0;
+	}
+
+	in = vlist_find(&s->instances, blobmsg_data(cur), in, node);
+	if (!in) {
+		ERROR("instance %s not found\n", (char *) blobmsg_data(cur));
+		return UBUS_STATUS_NOT_FOUND;
+	}
+
+	vlist_delete(&s->instances, &in->node);
+
+	return 0;
+}
+
+static int
+service_handle_update(struct ubus_context *ctx, struct ubus_object *obj,
+		      struct ubus_request_data *req, const char *method,
+		      struct blob_attr *msg)
+{
+	struct blob_attr *tb[__SERVICE_ATTR_MAX], *cur;
+	struct service *s;
+
+	blobmsg_parse(service_attrs, __SERVICE_ATTR_MAX, tb, blob_data(msg), blob_len(msg));
+
+	cur = tb[SERVICE_ATTR_NAME];
+	if (!cur)
+		return UBUS_STATUS_INVALID_ARGUMENT;
+
+	s = avl_find_element(&services, blobmsg_data(cur), s, avl);
+	if (!s)
+		return UBUS_STATUS_NOT_FOUND;
+
+	if (!strcmp(method, "update_start"))
+		vlist_update(&s->instances);
+	else
+		vlist_flush(&s->instances);
+
+	return 0;
+}
+
+static int
+service_get_data(struct ubus_context *ctx, struct ubus_object *obj,
+		 struct ubus_request_data *req, const char *method,
+		 struct blob_attr *msg)
+{
+	struct service_instance *in;
+	struct service *s;
+	struct blob_attr *tb[__DATA_MAX];
+	const char *name = NULL;
+	const char *instance = NULL;
+	const char *type = NULL;
+
+	blobmsg_parse(get_data_policy, __DATA_MAX, tb, blob_data(msg), blob_len(msg));
+	if (tb[DATA_NAME])
+		name = blobmsg_data(tb[DATA_NAME]);
+	if (tb[DATA_INSTANCE])
+		instance = blobmsg_data(tb[DATA_INSTANCE]);
+	if (tb[DATA_TYPE])
+		type = blobmsg_data(tb[DATA_TYPE]);
+
+	blob_buf_init(&b, 0);
+	avl_for_each_element(&services, s, avl) {
+		void *cs = NULL;
+
+		if (name && strcmp(name, s->name))
+			continue;
+
+		vlist_for_each_element(&s->instances, in, node) {
+			struct blobmsg_list_node *var;
+			void *ci = NULL;
+
+			if (instance && strcmp(instance, in->name))
+				continue;
+
+			blobmsg_list_for_each(&in->data, var) {
+				if (type &&
+				    strcmp(blobmsg_name(var->data), type))
+					continue;
+
+				if (!cs)
+					cs = blobmsg_open_table(&b, s->name);
+				if (!ci)
+					ci = blobmsg_open_table(&b, in->name);
+
+				blobmsg_add_blob(&b, var->data);
+			}
+
+			if (ci)
+				blobmsg_close_table(&b, ci);
+		}
+
+		if (cs)
+			blobmsg_close_table(&b, cs);
+	}
+
+	ubus_send_reply(ctx, req, b.head);
+	return 0;
+}
+
+static struct ubus_method main_object_methods[] = {
+	UBUS_METHOD("set", service_handle_set, service_set_attrs),
+	UBUS_METHOD("add", service_handle_set, service_set_attrs),
+	UBUS_METHOD("list", service_handle_list, service_list_attrs),
+	UBUS_METHOD("delete", service_handle_delete, service_del_attrs),
+	UBUS_METHOD("update_start", service_handle_update, service_attrs),
+	UBUS_METHOD("update_complete", service_handle_update, service_attrs),
+	UBUS_METHOD("get_data", service_get_data, get_data_policy),
+};
+
+static struct ubus_object_type main_object_type =
+	UBUS_OBJECT_TYPE("service", main_object_methods);
+
+static struct ubus_object main_object = {
+	.name = "service",
+	.type = &main_object_type,
+	.methods = main_object_methods,
+	.n_methods = ARRAY_SIZE(main_object_methods),
+};
+
+int
+service_start_early(char *name, char *cmdline)
+{
+	void *instances, *instance, *command, *respawn;
+	char *t;
+
+	blob_buf_init(&b, 0);
+	blobmsg_add_string(&b, "name", name);
+	instances = blobmsg_open_table(&b, "instances");
+	instance = blobmsg_open_table(&b, "instance1");
+	command = blobmsg_open_array(&b, "command");
+	t = strtok(cmdline, " ");
+	while (t) {
+		blobmsg_add_string(&b, NULL, t);
+		t = strtok(NULL, " ");
+	}
+	blobmsg_close_array(&b, command);
+	respawn = blobmsg_open_array(&b, "respawn");
+	blobmsg_add_string(&b, NULL, "3600");
+	blobmsg_add_string(&b, NULL, "1");
+	blobmsg_add_string(&b, NULL, "0");
+	blobmsg_close_array(&b, respawn);
+	blobmsg_close_table(&b, instance);
+	blobmsg_close_table(&b, instances);
+
+	return service_handle_set(NULL, NULL, NULL, "add", b.head);
+}
+
+void service_event(const char *type, const char *service, const char *instance)
+{
+	if (!ctx)
+		return;
+
+	blob_buf_init(&b, 0);
+	blobmsg_add_string(&b, "service", service);
+	if (instance)
+		blobmsg_add_string(&b, "instance", instance);
+	ubus_notify(ctx, &main_object, type, b.head, -1);
+}
+
+void ubus_init_service(struct ubus_context *_ctx)
+{
+	ctx = _ctx;
+	ubus_add_object(ctx, &main_object);
+}
+
+void
+service_init(void)
+{
+	avl_init(&services, avl_strcmp, false, NULL);
+}
+