service.c

   1 #include <libubox/avl-cmp.h>
   2 #include "procd.h"
   3 #include "service.h"
   4 #include "instance.h"
   5
   6 struct avl_tree services;
   7 static struct blob_buf b;
   8
   9 static void
  10 service_instance_add(struct service *s, struct blob_attr *attr)
  11 {
  12         struct service_instance *in;
  13
  14         if (blobmsg_type(attr) != BLOBMSG_TYPE_TABLE)
  15                 return;
  16
  17         in = calloc(1, sizeof(*in));
  18         if (!in)
  19                 return;
  20
  21         instance_init(in, s, attr);
  22         vlist_add(&s->instances, &in->node, (void *) in->name);
  23 }
  24
  25 static void
  26 service_instance_update(struct vlist_tree *tree, struct vlist_node *node_new,
  27                         struct vlist_node *node_old)
  28 {
  29         struct service_instance *in_o = NULL, *in_n = NULL;
  30
  31         if (node_old)
  32                 in_o = container_of(node_old, struct service_instance, node);
  33
  34         if (node_new)
  35                 in_n = container_of(node_new, struct service_instance, node);
  36
  37         if (in_o && in_n) {
  38                 DPRINTF("Update instance %s::%s\n", in_o->srv->name, in_o->name);
  39                 instance_update(in_o, in_n);
  40                 instance_free(in_n);
  41         } else if (in_o) {
  42                 DPRINTF("Free instance %s::%s\n", in_o->srv->name, in_o->name);
  43                 instance_stop(in_o, false);
  44                 instance_free(in_o);
  45         } else if (in_n) {
  46                 DPRINTF("Create instance %s::%s\n", in_n->srv->name, in_n->name);
  47                 instance_start(in_n);
  48         }
  49 }
  50
  51 static struct service *
  52 service_alloc(const char *name)
  53 {
  54         struct service *s;
  55         char *new_name;
  56
  57         s = calloc_a(sizeof(*s), &new_name, strlen(name) + 1);
  58         strcpy(new_name, name);
  59
  60         vlist_init(&s->instances, avl_strcmp, service_instance_update);
  61         s->instances.keep_old = true;
  62         s->name = new_name;
  63         s->avl.key = s->name;
  64
  65         return s;
  66 }
  67
  68 enum {
  69         SERVICE_SET_NAME,
  70         SERVICE_SET_SCRIPT,
  71         SERVICE_SET_INSTANCES,
  72         __SERVICE_SET_MAX
  73 };
  74
  75 static const struct blobmsg_policy service_set_attrs[__SERVICE_SET_MAX] = {
  76         [SERVICE_SET_NAME] = { "name", BLOBMSG_TYPE_STRING },
  77         [SERVICE_SET_SCRIPT] = { "script", BLOBMSG_TYPE_STRING },
  78         [SERVICE_SET_INSTANCES] = { "instances", BLOBMSG_TYPE_TABLE },
  79 };
  80
  81
  82 static int
  83 service_update(struct service *s, struct blob_attr *config, struct blob_attr **tb, bool add)
  84 {
  85         struct blob_attr *cur;
  86         int rem;
  87
  88         if (tb[SERVICE_SET_INSTANCES]) {
  89                 if (!add)
  90                         vlist_update(&s->instances);
  91                 blobmsg_for_each_attr(cur, tb[SERVICE_SET_INSTANCES], rem) {
  92                         service_instance_add(s, cur);
  93                 }
  94                 if (!add)
  95                         vlist_flush(&s->instances);
  96         }
  97
  98         return 0;
  99 }
 100
 101 static void
 102 service_delete(struct service *s)
 103 {
 104         vlist_flush_all(&s->instances);
 105         avl_delete(&services, &s->avl);
 106         free(s->config);
 107         free(s);
 108 }
 109
 110 enum {
 111         SERVICE_ATTR_NAME,
 112         __SERVICE_ATTR_MAX,
 113 };
 114
 115 static const struct blobmsg_policy service_attrs[__SERVICE_ATTR_MAX] = {
 116         [SERVICE_ATTR_NAME] = { "name", BLOBMSG_TYPE_STRING },
 117 };
 118
 119 enum {
 120         SERVICE_DEL_ATTR_NAME,
 121         SERVICE_DEL_ATTR_INSTANCE,
 122         __SERVICE_DEL_ATTR_MAX,
 123 };
 124
 125 static const struct blobmsg_policy service_del_attrs[__SERVICE_DEL_ATTR_MAX] = {
 126         [SERVICE_DEL_ATTR_NAME] = { "name", BLOBMSG_TYPE_STRING },
 127         [SERVICE_DEL_ATTR_INSTANCE] = { "instance", BLOBMSG_TYPE_STRING },
 128 };
 129
 130
 131 static int
 132 service_handle_set(struct ubus_context *ctx, struct ubus_object *obj,
 133                    struct ubus_request_data *req, const char *method,
 134                    struct blob_attr *msg)
 135 {
 136         struct blob_attr *tb[__SERVICE_SET_MAX], *cur;
 137         struct service *s = NULL;
 138         const char *name;
 139         int ret = UBUS_STATUS_INVALID_ARGUMENT;
 140         bool add = !strcmp(method, "add");
 141
 142         blobmsg_parse(service_set_attrs, __SERVICE_SET_MAX, tb, blob_data(msg), blob_len(msg));
 143         cur = tb[SERVICE_ATTR_NAME];
 144         if (!cur)
 145                 goto free;
 146
 147         name = blobmsg_data(cur);
 148
 149         s = avl_find_element(&services, name, s, avl);
 150         if (s) {
 151                 DPRINTF("Update service %s\n", name);
 152                 return service_update(s, msg, tb, add);
 153         }
 154
 155         DPRINTF("Create service %s\n", name);
 156         s = service_alloc(name);
 157         if (!s)
 158                 return UBUS_STATUS_UNKNOWN_ERROR;
 159
 160         ret = service_update(s, msg, tb, add);
 161         if (ret)
 162                 goto free;
 163
 164         avl_insert(&services, &s->avl);
 165
 166         return 0;
 167
 168 free:
 169         free(msg);
 170         return ret;
 171 }
 172
 173 static void
 174 service_dump(struct service *s)
 175 {
 176         struct service_instance *in;
 177         void *c, *i;
 178
 179         c = blobmsg_open_table(&b, s->name);
 180         i = blobmsg_open_table(&b, "instances");
 181         vlist_for_each_element(&s->instances, in, node)
 182                 instance_dump(&b, in);
 183         blobmsg_close_table(&b, i);
 184         blobmsg_close_table(&b, c);
 185 }
 186
 187 static int
 188 service_handle_list(struct ubus_context *ctx, struct ubus_object *obj,
 189                     struct ubus_request_data *req, const char *method,
 190                     struct blob_attr *msg)
 191 {
 192         struct service *s;
 193
 194         blob_buf_init(&b, 0);
 195         avl_for_each_element(&services, s, avl)
 196                 service_dump(s);
 197
 198         ubus_send_reply(ctx, req, b.head);
 199
 200         return 0;
 201 }
 202
 203 static int
 204 service_handle_delete(struct ubus_context *ctx, struct ubus_object *obj,
 205                     struct ubus_request_data *req, const char *method,
 206                     struct blob_attr *msg)
 207 {
 208         struct blob_attr *tb[__SERVICE_DEL_ATTR_MAX], *cur;
 209         struct service *s, *tmp;
 210         struct service_instance *in;
 211
 212         blobmsg_parse(service_del_attrs, __SERVICE_DEL_ATTR_MAX, tb, blob_data(msg), blob_len(msg));
 213
 214         cur = tb[SERVICE_DEL_ATTR_NAME];
 215         if (!cur) {
 216                 avl_for_each_element_safe(&services, s, avl, tmp)
 217                         service_delete(s);
 218                 return 0;
 219         }
 220
 221         s = avl_find_element(&services, blobmsg_data(cur), s, avl);
 222         if (!s)
 223                 return UBUS_STATUS_NOT_FOUND;
 224
 225         cur = tb[SERVICE_DEL_ATTR_INSTANCE];
 226         if (!cur) {
 227                 service_delete(s);
 228                 return 0;
 229         }
 230
 231         in = vlist_find(&s->instances, blobmsg_data(cur), in, node);
 232         if (!in) {
 233                 fprintf(stderr, "instance %s not found\n", (char *) blobmsg_data(cur));
 234                 return UBUS_STATUS_NOT_FOUND;
 235         }
 236
 237         vlist_delete(&s->instances, &in->node);
 238
 239         return 0;
 240 }
 241
 242 static int
 243 service_handle_update(struct ubus_context *ctx, struct ubus_object *obj,
 244                       struct ubus_request_data *req, const char *method,
 245                       struct blob_attr *msg)
 246 {
 247         struct blob_attr *tb[__SERVICE_ATTR_MAX], *cur;
 248         struct service *s;
 249
 250         blobmsg_parse(service_attrs, __SERVICE_ATTR_MAX, tb, blob_data(msg), blob_len(msg));
 251
 252         cur = tb[SERVICE_ATTR_NAME];
 253         if (!cur)
 254                 return UBUS_STATUS_INVALID_ARGUMENT;
 255
 256         s = avl_find_element(&services, blobmsg_data(cur), s, avl);
 257         if (!s)
 258                 return UBUS_STATUS_NOT_FOUND;
 259
 260         if (!strcmp(method, "update_start"))
 261                 vlist_update(&s->instances);
 262         else
 263                 vlist_flush(&s->instances);
 264
 265         return 0;
 266 }
 267
 268 static struct ubus_method main_object_methods[] = {
 269         UBUS_METHOD("set", service_handle_set, service_set_attrs),
 270         UBUS_METHOD("add", service_handle_set, service_set_attrs),
 271         UBUS_METHOD("list", service_handle_list, service_attrs),
 272         UBUS_METHOD("delete", service_handle_delete, service_del_attrs),
 273         UBUS_METHOD("update_start", service_handle_update, service_attrs),
 274         UBUS_METHOD("update_complete", service_handle_update, service_attrs),
 275 };
 276
 277 static struct ubus_object_type main_object_type =
 278         UBUS_OBJECT_TYPE("service", main_object_methods);
 279
 280 static struct ubus_object main_object = {
 281         .name = "service",
 282         .type = &main_object_type,
 283         .methods = main_object_methods,
 284         .n_methods = ARRAY_SIZE(main_object_methods),
 285 };
 286
 287 void procd_init_service(struct ubus_context *ctx)
 288 {
 289         avl_init(&services, avl_strcmp, false, NULL);
 290         ubus_add_object(ctx, &main_object);
 291 }