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#include <libubox/avl-cmp.h>
#include "procd.h"
#include "service.h"
#include "instance.h"
struct avl_tree services;
static struct blob_buf b;
static void
service_instance_add(struct service *s, struct blob_attr *attr)
{
struct service_instance *in;
const char *name = blobmsg_name(attr);
if (blobmsg_type(attr) != BLOBMSG_TYPE_TABLE)
return;
in = calloc(1, sizeof(*in));
if (!in)
return;
instance_init(in, attr);
vlist_add(&s->instances, &in->node, (void *) 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) {
instance_update(in_o, in_n);
instance_free(in_n);
} else if (in_o) {
instance_stop(in_o, false);
instance_free(in_o);
} else if (in_n) {
instance_start(in_n);
}
}
static struct service *
service_alloc(const char *name)
{
struct service *s;
s = calloc(1, sizeof(*s));
vlist_init(&s->instances, avl_strcmp, service_instance_update);
s->instances.keep_old = true;
return s;
}
enum {
SERVICE_ATTR_NAME,
SERVICE_ATTR_SCRIPT,
SERVICE_ATTR_INSTANCES,
__SERVICE_ATTR_MAX
};
static const struct blobmsg_policy service_attrs[__SERVICE_ATTR_MAX] = {
[SERVICE_ATTR_NAME] = { "name", BLOBMSG_TYPE_STRING },
[SERVICE_ATTR_SCRIPT] = { "script", BLOBMSG_TYPE_STRING },
[SERVICE_ATTR_INSTANCES] = { "instances", BLOBMSG_TYPE_TABLE },
};
static int
service_update(struct service *s, struct blob_attr *config, struct blob_attr **tb)
{
struct blob_attr *old_config = s->config;
struct blob_attr *cur;
int rem;
/* only the pointer changes, the content stays the same,
* no avl update necessary */
s->name = s->avl.key = blobmsg_data(tb[SERVICE_ATTR_NAME]);
s->config = config;
if (tb[SERVICE_ATTR_INSTANCES]) {
vlist_update(&s->instances);
blobmsg_for_each_attr(cur, tb[SERVICE_ATTR_INSTANCES], rem) {
service_instance_add(s, cur);
}
vlist_flush(&s->instances);
}
free(old_config);
return 0;
}
static void
service_delete(struct service *s)
{
vlist_flush_all(&s->instances);
avl_delete(&services, &s->avl);
free(s->config);
free(s);
}
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_ATTR_MAX], *cur;
struct service *s = NULL;
const char *name;
int ret = UBUS_STATUS_INVALID_ARGUMENT;
msg = blob_memdup(msg);
if (!msg)
return UBUS_STATUS_UNKNOWN_ERROR;
blobmsg_parse(service_attrs, __SERVICE_ATTR_MAX, tb, blob_data(msg), blob_len(msg));
cur = tb[SERVICE_ATTR_NAME];
if (!cur)
goto free;
name = blobmsg_data(cur);
s = avl_find_element(&services, name, s, avl);
if (s)
return service_update(s, msg, tb);
s = service_alloc(name);
if (!s)
return UBUS_STATUS_UNKNOWN_ERROR;
ret = service_update(s, msg, tb);
if (ret)
goto free;
avl_insert(&services, &s->avl);
return 0;
free:
free(msg);
return ret;
}
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 service *s;
blob_buf_init(&b, 0);
avl_for_each_element(&services, s, avl) {
void *c;
c = blobmsg_open_table(&b, s->name);
blobmsg_close_table(&b, c);
}
ubus_send_reply(ctx, req, b.head);
return 0;
}
enum {
SERVICE_DEL_NAME,
__SERVICE_DEL_MAX,
};
static const struct blobmsg_policy service_del_attrs[__SERVICE_DEL_MAX] = {
[SERVICE_DEL_NAME] = { "name", BLOBMSG_TYPE_STRING },
};
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_MAX], *cur;
struct service *s, *tmp;
blobmsg_parse(service_del_attrs, __SERVICE_DEL_MAX, tb, blob_data(msg), blob_len(msg));
cur = tb[SERVICE_ATTR_NAME];
if (!cur) {
avl_for_each_element_safe(&services, s, avl, tmp)
service_delete(s);
return 0;
}
s = avl_find_element(&services, blobmsg_data(cur), s, avl);
if (!s)
return UBUS_STATUS_NOT_FOUND;
service_delete(s);
return 0;
}
static struct ubus_method main_object_methods[] = {
{ .name = "list", .handler = service_handle_list },
{ .name = "set", .handler = service_handle_set },
{ .name = "delete", .handler = service_handle_delete },
};
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),
};
void procd_init_service(struct ubus_context *ctx)
{
avl_init(&services, avl_strcmp, false, NULL);
ubus_add_object(ctx, &main_object);
}
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