src/daemon/mm_resource_manager_daemon_dbus.c

   1 /*
   2  * Copyright (c) 2017 Samsung Electronics Co., Ltd All Rights Reserved
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #include "daemon/mm_resource_manager_daemon_dbus.h"
  18 #include "common/mm_resource_manager_dbus.h"
  19 #include "daemon/mm_resource_manager_daemon_priv.h"
  20 #include "common/mm_resource_manager_utils.h"
  21 #include "daemon/mm_resource_manager_daemon_conf.h"
  22
  23
  24 static MMResourceManager *interface;
  25
  26 extern int notify_fd[2];
  27
  28
  29 static void __gv2c_array(GVariantIter *gv, mm_resource_manager_dmn_res_request_s **c);
  30 static gboolean on_get_conf(MMResourceManager *interface,
  31                 GDBusMethodInvocation *invocation, gpointer user_data);
  32 static gboolean on_create_handle(MMResourceManager *interface,
  33                 GDBusMethodInvocation *invocation, const gint app_class,
  34                 gpointer user_data);
  35 static gboolean on_destroy_handle(MMResourceManager *interface,
  36                 GDBusMethodInvocation *invocation, const guint64 id, gpointer user_data);
  37 static gboolean on_commit_handle(MMResourceManager *interface,
  38                 GDBusMethodInvocation *invocation, const guint64 id,
  39                 GVariant *release, GVariant *acquire, gpointer user_data);
  40 static void on_bus_acquired(GDBusConnection *connection, const gchar *name,
  41                 gpointer user_data);
  42
  43 static gboolean _type_is_valid(int type)
  44 {
  45         if ((type != MM_RESOURCE_MANAGER_NO_RES) &&
  46                 (type < MM_RESOURCE_MANAGER_RES_TYPE_VIDEO_DECODER || type >= MM_RESOURCE_MANAGER_RES_TYPE_MAX))
  47                 return FALSE;
  48
  49         return TRUE;
  50 }
  51
  52
  53 static gboolean _create_pid_file(void)
  54 {
  55         int fd;
  56         struct flock lock;
  57         char pid_buf[PID_MSG_LEN] = {'\0',};
  58
  59         fd = open(PID_FILE, O_WRONLY | O_CREAT, (S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH));
  60         MM_RM_RETVM_IF(fd < 0, FALSE, "PID file cannot be created (%d)", errno);
  61
  62         lock.l_type = F_WRLCK;
  63         lock.l_start = 0;
  64         lock.l_whence = SEEK_SET;
  65         lock.l_len = 1000;
  66
  67         if (fcntl(fd, F_SETLK, &lock) < 0) {
  68                 if (errno != EACCES && errno != EAGAIN)
  69                         MM_RM_ERROR("Fail to lock pidfile [%d]", errno);
  70                 else
  71                         MM_RM_ERROR("process is already running");
  72
  73                 goto error;
  74         }
  75
  76         if (ftruncate(fd, 0) < 0) {
  77                 MM_RM_ERROR("Fail to truncate pidfile [%d]", errno);
  78                 goto error;
  79         }
  80
  81         memset(pid_buf, 0, sizeof(pid_buf));
  82         snprintf(pid_buf, sizeof(pid_buf), "%u", getpid());
  83
  84         if (write(fd, pid_buf, strlen(pid_buf)) != (int)strlen(pid_buf)) {
  85                 MM_RM_ERROR("Fail to write pid to pidfile [%d]", errno);
  86                 goto error;
  87         }
  88
  89         close(fd);
  90
  91         MM_RM_INFO("PID file (%s) is created", PID_FILE);
  92         return TRUE;
  93
  94 error:
  95         close(fd);
  96         return FALSE;
  97 }
  98
  99 static gboolean _create_ready_file(void)
 100 {
 101         int fd = -1;
 102
 103         if ((fd = creat(MM_RESOURCE_MANAGER_READY, 0644)) != -1) {
 104                 MM_RM_INFO("ready file(%s) file was created", MM_RESOURCE_MANAGER_READY);
 105                 close(fd);
 106         } else {
 107                 MM_RM_ERROR("cannot create ready file(%s), errno(%d)", MM_RESOURCE_MANAGER_READY, errno);
 108                 return FALSE;
 109         }
 110
 111         return TRUE;
 112 }
 113
 114 static gboolean _create_daemon_setup_file(void)
 115 {
 116         _mmrm_dmn_notify_fork_done();
 117         return _create_pid_file() && _create_ready_file();
 118 }
 119
 120 int _mmrm_dmn_dbus_init(void)
 121 {
 122         interface = mmresource_manager_skeleton_new();
 123         MM_RM_RETVM_IF(interface == NULL,
 124                         MM_RESOURCE_MANAGER_ERROR_INVALID_OPERATION,
 125                         "Interface cannot be created");
 126         g_bus_own_name(G_BUS_TYPE_SYSTEM, RMD_GDBUS_NAME,
 127                         G_BUS_NAME_OWNER_FLAGS_NONE, on_bus_acquired, NULL, NULL, NULL,
 128                         NULL);
 129         return MM_RESOURCE_MANAGER_ERROR_NONE;
 130 }
 131
 132 int _mmrm_dmn_dbus_deinit(void)
 133 {
 134         MM_RM_RETVM_IF(interface == NULL,
 135                         MM_RESOURCE_MANAGER_ERROR_INVALID_OPERATION, "Interface is NULL");
 136         g_object_unref(interface);
 137         interface = NULL;
 138         return MM_RESOURCE_MANAGER_ERROR_NONE;
 139 }
 140
 141 int _mmrm_dmn_dbus_get_conf(mm_resource_manager_res_volume **max_volume,
 142                 mm_resource_manager_condition_volume_a **cond_volume, int **max_instance)
 143 {
 144         mm_resource_manager_conf_s *conf;
 145
 146         conf = mm_resource_manager_get_conf();
 147
 148         MM_RM_RETVM_IF(conf == NULL,
 149                         MM_RESOURCE_MANAGER_ERROR_INVALID_OPERATION,
 150                         "mm_resource_manager_conf is NULL");
 151
 152         *max_volume = conf->max_volume;
 153         *cond_volume = &conf->condition_volume;
 154         *max_instance = conf->max_instance;
 155
 156         return MM_RESOURCE_MANAGER_ERROR_NONE;
 157 }
 158
 159 int _mmrm_dmn_dbus_create(mm_resource_manager_app_class_e app_class,
 160                 mm_resource_manager_id *id)
 161 {
 162         return _mmrm_dmn_create(app_class, id);
 163 }
 164
 165 int _mmrm_dmn_dbus_destroy(mm_resource_manager_id id)
 166 {
 167         return _mmrm_dmn_destroy(id);
 168 }
 169
 170 int _mmrm_dmn_dbus_commit(mm_resource_manager_id id, GVariantIter *release,
 171                 GVariantIter *acquire, gboolean **is_acquired)
 172 {
 173         int i;
 174         int ret;
 175         mm_resource_manager_res_type_e type;
 176         mm_resource_manager_dmn_res_request_s *release_requests = NULL, *acquire_requests = NULL;
 177         gsize release_len = 0, acquire_len = 0;
 178
 179         __gv2c_array(release, &release_requests);
 180
 181         type = release_requests->type;
 182         release_len = g_variant_iter_n_children(release);
 183
 184         if (!_type_is_valid(type)) {
 185                 ret = MM_RESOURCE_MANAGER_ERROR_INVALID_PARAMETER;
 186                 goto out;
 187         }
 188
 189         MM_RM_DEBUG("Commit release request of %"G_GSIZE_FORMAT" items [type %d]", release_len, type);
 190
 191         __gv2c_array(acquire, &acquire_requests);
 192
 193         type = acquire_requests->type;
 194         acquire_len = g_variant_iter_n_children(acquire);
 195
 196         if (!_type_is_valid(type)) {
 197                 ret = MM_RESOURCE_MANAGER_ERROR_INVALID_PARAMETER;
 198                 goto out;
 199         }
 200
 201         MM_RM_DEBUG("Commit acquire request of %"G_GSIZE_FORMAT" items [type %d]", acquire_len, type);
 202
 203         *is_acquired = (gboolean *) g_malloc0_n(acquire_len, sizeof(**is_acquired));
 204
 205         ret = _mmrm_dmn_commit(id, release_requests, acquire_requests);
 206
 207         for (i = 0; acquire_requests[i].type != MM_RESOURCE_MANAGER_NO_RES; i++)
 208                 (*is_acquired)[i] = acquire_requests[i].priority_error;
 209
 210 out:
 211         g_free(release_requests);
 212         g_free(acquire_requests);
 213
 214         return ret;
 215 }
 216
 217 int _mmrm_dmn_dbus_release_callback(mm_resource_manager_id id,
 218                 mm_resource_manager_res_type_e type,
 219                 mm_resource_manager_res_volume volume)
 220 {
 221         mmresource_manager_emit_release_callback(interface, id, type, volume);
 222         return MM_RESOURCE_MANAGER_ERROR_NONE;
 223 }
 224
 225 int _mmrm_dmn_dbus_status_callback(mm_resource_manager_status_e status)
 226 {
 227         MM_RM_DEBUG("Emitting %d status", status);
 228         mmresource_manager_emit_status_callback(interface, status);
 229         return MM_RESOURCE_MANAGER_ERROR_NONE;
 230 }
 231
 232 void _mmrm_dmn_notify_fork_done(void)
 233 {
 234         /* Send "string" through the output side of pipe */
 235         MM_RM_RETM_IF(write(notify_fd[1], MSG_DONE, strlen(MSG_DONE) + 1) < 0,
 236                 "Failed to notify parent process that child initialization is done");
 237
 238         MM_RM_DEBUG("[%d] Notify parent process that child initialization is done", notify_fd[1]);
 239         close(notify_fd[0]);
 240         close(notify_fd[1]);
 241 }
 242
 243 static void __gv2c_array(GVariantIter *gv, mm_resource_manager_dmn_res_request_s **c)
 244 {
 245         int i;
 246         mm_resource_manager_res_type_e type;
 247         mm_resource_manager_dmn_res_request_s *rs;
 248
 249         rs = (mm_resource_manager_dmn_res_request_s *)g_malloc0_n(g_variant_iter_n_children(gv), sizeof(*rs));
 250         for (i = 0; g_variant_iter_next(gv, "(ii)", &rs[i].type, &rs[i].volume); i++) {
 251                 type = rs[i].type;
 252                 if (!_type_is_valid(type)) {
 253                         MM_RM_ERROR("type %d is wrong", type);
 254                         break;
 255                 }
 256
 257                 MM_RM_DEBUG("(type, vol) = (%d, %d)", type, rs[i].volume);
 258         }
 259
 260         *c = rs;
 261 }
 262
 263 static gboolean on_get_conf(MMResourceManager *interface,
 264                 GDBusMethodInvocation *invocation, gpointer user_data)
 265 {
 266         int i, j;
 267         gint error = 0;
 268         mm_resource_manager_res_volume *max_volume = NULL;
 269         mm_resource_manager_condition_volume_a *cond_volume = NULL;
 270         int *max_instance = NULL;
 271         GVariantBuilder *res_type_builder;
 272         GVariantBuilder *res_cond_builder;
 273         GVariantBuilder *res_instance_builder;
 274         GVariant *res_type_conf;
 275         GVariant *res_cond_conf;
 276         GVariant *res_instance_conf;
 277
 278         error = _mmrm_dmn_dbus_get_conf(&max_volume, &cond_volume, &max_instance);
 279
 280         res_type_builder = g_variant_builder_new(G_VARIANT_TYPE_ARRAY);
 281         for (i = 0; i < MM_RESOURCE_MANAGER_RES_TYPE_MAX; i++)
 282                 g_variant_builder_add_value(res_type_builder, g_variant_new("i", max_volume[i]));
 283
 284         res_type_conf = g_variant_builder_end(res_type_builder);
 285         g_variant_builder_unref(res_type_builder);
 286
 287         res_type_builder = g_variant_builder_new(G_VARIANT_TYPE_ARRAY);
 288         for (i = 0; i < MM_RESOURCE_MANAGER_RES_TYPE_MAX; i++) {
 289                 res_cond_builder = g_variant_builder_new(G_VARIANT_TYPE_ARRAY);
 290                 for (j = 0; j < MM_RESOURCE_MANAGER_RES_TYPE_COND_MAX; j++)
 291                         g_variant_builder_add_value(res_cond_builder, g_variant_new("i", (*cond_volume)[i][j]));
 292
 293                 g_variant_builder_add_value(res_type_builder, g_variant_builder_end(res_cond_builder));
 294                 g_variant_builder_unref(res_cond_builder);
 295         }
 296         res_cond_conf = g_variant_builder_end(res_type_builder);
 297         g_variant_builder_unref(res_type_builder);
 298
 299         res_instance_builder = g_variant_builder_new(G_VARIANT_TYPE_ARRAY);
 300         for (i = 0; i < MM_RESOURCE_MANAGER_RES_TYPE_MAX; i++)
 301                 g_variant_builder_add_value(res_instance_builder, g_variant_new("i", max_instance[i]));
 302         res_instance_conf = g_variant_builder_end(res_instance_builder);
 303         g_variant_builder_unref(res_instance_builder);
 304
 305         mmresource_manager_complete_conf(interface, invocation, error, res_type_conf, res_cond_conf, res_instance_conf);
 306
 307         return TRUE;
 308 }
 309
 310 static gboolean on_create_handle(MMResourceManager *interface,
 311                 GDBusMethodInvocation *invocation, const gint app_class,
 312                 gpointer user_data)
 313 {
 314         guint64 id = 0;
 315         gint error = 0;
 316
 317         error = _mmrm_dmn_dbus_create(app_class, &id);
 318
 319         MM_RM_DEBUG("Receive create message for RM");
 320
 321         mmresource_manager_complete_create(interface, invocation, id, error);
 322
 323         return TRUE;
 324 }
 325
 326 static gboolean on_destroy_handle(MMResourceManager *interface,
 327                 GDBusMethodInvocation *invocation, const guint64 id, gpointer user_data)
 328 {
 329         gint error = 0;
 330
 331         MM_RM_DEBUG("Receive destroy message for RM");
 332         error = _mmrm_dmn_dbus_destroy(id);
 333
 334         mmresource_manager_complete_destroy(interface, invocation, error);
 335         return TRUE;
 336 }
 337
 338 static gboolean on_commit_handle(MMResourceManager *interface,
 339                 GDBusMethodInvocation *invocation, const guint64 id,
 340                 GVariant *release, GVariant *acquire, gpointer user_data)
 341 {
 342         gint error = 0;
 343         gboolean ret = TRUE, *flags;
 344         GVariantBuilder *flags_builder;
 345         GVariantIter *release_array;
 346         GVariantIter *acquire_array;
 347         gint i;
 348
 349         MM_RM_DEBUG("Receive commit message");
 350
 351         release_array = g_variant_iter_new(release);
 352         acquire_array = g_variant_iter_new(acquire);
 353
 354         error = _mmrm_dmn_dbus_commit(id, release_array, acquire_array, &flags);
 355         if (error != MM_RESOURCE_MANAGER_ERROR_NONE) {
 356                 MM_RM_ERROR("dbus commit error");
 357                 ret = FALSE;
 358                 goto out;
 359         }
 360
 361         flags_builder = g_variant_builder_new(G_VARIANT_TYPE_ARRAY);
 362         for (i = 0; i < g_variant_iter_n_children(acquire_array); i++)
 363                 g_variant_builder_add_value(flags_builder, g_variant_new("b", flags[i]));
 364         mmresource_manager_complete_commit(interface, invocation, error, g_variant_builder_end(flags_builder));
 365
 366         g_free(flags);
 367         g_variant_builder_unref(flags_builder);
 368
 369 out:
 370         g_variant_iter_free(release_array);
 371         g_variant_iter_free(acquire_array);
 372
 373         return ret;
 374 }
 375
 376 static void on_bus_acquired(GDBusConnection *connection, const gchar *name,
 377                 gpointer user_data)
 378 {
 379         GError *error = NULL;
 380         MM_RM_DEBUG("name of bus = %s, userID = %d", name, getuid());
 381
 382         g_signal_connect(interface, "handle-conf", G_CALLBACK(on_get_conf), NULL);
 383         g_signal_connect(interface, "handle-create", G_CALLBACK(on_create_handle), NULL);
 384         g_signal_connect(interface, "handle-destroy", G_CALLBACK(on_destroy_handle), NULL);
 385         g_signal_connect(interface, "handle-commit", G_CALLBACK(on_commit_handle), NULL);
 386
 387         if (!g_dbus_interface_skeleton_export(G_DBUS_INTERFACE_SKELETON(interface),
 388                         connection, RMD_GDBUS_PATH, &error)) {
 389                 MM_RM_ERROR("failed to export interface. msg : %s", error->message);
 390                 g_error_free(error);
 391                 return;
 392         }
 393
 394         MM_RM_RETM_IF(!_create_daemon_setup_file(), "Daemon cannot create setup file");
 395 }