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
  44 static gboolean _create_pid_file(void)
  45 {
  46         int fd;
  47         struct flock lock;
  48         char pid_buf[PID_MSG_LEN] = {'\0',};
  49
  50         fd = open(PID_FILE, O_WRONLY | O_CREAT, (S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH));
  51         MM_RM_RETVM_IF(fd < 0, FALSE, "PID file cannot be created (%d)", errno);
  52
  53         lock.l_type = F_WRLCK;
  54         lock.l_start = 0;
  55         lock.l_whence = SEEK_SET;
  56         lock.l_len = 1000;
  57
  58         if (fcntl(fd, F_SETLK, &lock) < 0) {
  59                 if (errno != EACCES && errno != EAGAIN)
  60                         MM_RM_ERROR("Fail to lock pidfile [%d]", errno);
  61                 else
  62                         MM_RM_ERROR("process is already running");
  63
  64                 goto error;
  65         }
  66
  67         if (ftruncate(fd, 0) < 0) {
  68                 MM_RM_ERROR("Fail to truncate pidfile [%d]", errno);
  69                 goto error;
  70         }
  71
  72         memset(pid_buf, 0, sizeof(pid_buf));
  73         snprintf(pid_buf, sizeof(pid_buf), "%u", getpid());
  74
  75         if (write(fd, pid_buf, strlen(pid_buf)) != (int)strlen(pid_buf)) {
  76                 MM_RM_ERROR("Fail to write pid to pidfile [%d]", errno);
  77                 goto error;
  78         }
  79
  80         close(fd);
  81
  82         MM_RM_INFO("PID file (%s) is created", PID_FILE);
  83         return TRUE;
  84
  85 error:
  86         close(fd);
  87         return FALSE;
  88 }
  89
  90 static gboolean _create_ready_file(void)
  91 {
  92         int fd = -1;
  93
  94         if ((fd = creat(MM_RESOURCE_MANAGER_READY, 0644)) != -1) {
  95                 MM_RM_INFO("ready file(%s) file was created", MM_RESOURCE_MANAGER_READY);
  96                 close(fd);
  97         } else {
  98                 MM_RM_ERROR("cannot create ready file(%s), errno(%d)", MM_RESOURCE_MANAGER_READY, errno);
  99                 return FALSE;
 100         }
 101
 102         return TRUE;
 103 }
 104
 105 static gboolean _create_daemon_setup_file(void)
 106 {
 107         _mmrm_dmn_notify_fork_done();
 108         return _create_pid_file() && _create_ready_file();
 109 }
 110
 111 int _mmrm_dmn_dbus_init(void)
 112 {
 113         interface = mmresource_manager_skeleton_new();
 114         MM_RM_RETVM_IF(interface == NULL,
 115                         MM_RESOURCE_MANAGER_ERROR_INVALID_OPERATION,
 116                         "Interface cannot be created");
 117         g_bus_own_name(G_BUS_TYPE_SYSTEM, RMD_GDBUS_NAME,
 118                         G_BUS_NAME_OWNER_FLAGS_NONE, on_bus_acquired, NULL, NULL, NULL,
 119                         NULL);
 120         return MM_RESOURCE_MANAGER_ERROR_NONE;
 121 }
 122
 123 int _mmrm_dmn_dbus_deinit(void)
 124 {
 125         MM_RM_RETVM_IF(interface == NULL,
 126                         MM_RESOURCE_MANAGER_ERROR_INVALID_OPERATION, "Interface is NULL");
 127         g_object_unref(interface);
 128         interface = NULL;
 129         return MM_RESOURCE_MANAGER_ERROR_NONE;
 130 }
 131
 132 int _mmrm_dmn_dbus_get_conf(mm_resource_manager_res_volume **max_volume,
 133                 mm_resource_manager_condition_volume_a **cond_volume, int **max_instance)
 134 {
 135         mm_resource_manager_conf_s *conf;
 136
 137         conf = mm_resource_manager_get_conf();
 138
 139         MM_RM_RETVM_IF(conf == NULL,
 140                         MM_RESOURCE_MANAGER_ERROR_INVALID_OPERATION,
 141                         "mm_resource_manager_conf is NULL");
 142
 143         *max_volume = conf->max_volume;
 144         *cond_volume = &conf->condition_volume;
 145         *max_instance = conf->max_instance;
 146
 147         return MM_RESOURCE_MANAGER_ERROR_NONE;
 148 }
 149
 150 int _mmrm_dmn_dbus_create(mm_resource_manager_app_class_e app_class,
 151                 mm_resource_manager_id *id)
 152 {
 153         return _mmrm_dmn_create(app_class, id);
 154 }
 155
 156 int _mmrm_dmn_dbus_destroy(mm_resource_manager_id id)
 157 {
 158         return _mmrm_dmn_destroy(id);
 159 }
 160
 161 int _mmrm_dmn_dbus_commit(mm_resource_manager_id id, GVariantIter *release,
 162                 GVariantIter *acquire, gboolean **is_acquired)
 163 {
 164         int i;
 165         int ret;
 166         mm_resource_manager_dmn_res_request_s *release_requests = NULL,
 167                         *acquire_requests = NULL;
 168
 169         __gv2c_array(release, &release_requests);
 170         if (release_requests->type != MM_RESOURCE_MANAGER_NO_RES)
 171                 MM_RM_DEBUG("Commit release request of %"G_GSIZE_FORMAT" items [type %d]",
 172                         g_variant_iter_n_children(release), release_requests->type);
 173
 174         __gv2c_array(acquire, &acquire_requests);
 175         if (acquire_requests->type != MM_RESOURCE_MANAGER_NO_RES)
 176                 MM_RM_DEBUG("Commit acquire request of %"G_GSIZE_FORMAT" items [type %d]",
 177                         g_variant_iter_n_children(acquire), acquire_requests->type);
 178
 179         *is_acquired = (gboolean *) g_malloc0_n(g_variant_iter_n_children(acquire), sizeof(**is_acquired));
 180
 181         ret = _mmrm_dmn_commit(id, release_requests, acquire_requests);
 182
 183         for (i = 0; acquire_requests[i].type != MM_RESOURCE_MANAGER_NO_RES; i++)
 184                 (*is_acquired)[i] = acquire_requests[i].priority_error;
 185
 186         g_free(release_requests);
 187         g_free(acquire_requests);
 188
 189         return ret;
 190 }
 191
 192 int _mmrm_dmn_dbus_release_callback(mm_resource_manager_id id,
 193                 mm_resource_manager_res_type_e type,
 194                 mm_resource_manager_res_volume volume)
 195 {
 196         mmresource_manager_emit_release_callback(interface, id, type, volume);
 197         return MM_RESOURCE_MANAGER_ERROR_NONE;
 198 }
 199
 200 int _mmrm_dmn_dbus_status_callback(mm_resource_manager_status_e status)
 201 {
 202         MM_RM_DEBUG("Emitting %d status", status);
 203         mmresource_manager_emit_status_callback(interface, status);
 204         return MM_RESOURCE_MANAGER_ERROR_NONE;
 205 }
 206
 207 void _mmrm_dmn_notify_fork_done(void)
 208 {
 209         /* Send "string" through the output side of pipe */
 210         MM_RM_RETM_IF(write(notify_fd[1], MSG_DONE, strlen(MSG_DONE) + 1) < 0,
 211                 "Failed to notify parent process that child initialization is done");
 212
 213         MM_RM_DEBUG("[%d] Notify parent process that child initialization is done", notify_fd[1]);
 214         close(notify_fd[0]);
 215         close(notify_fd[1]);
 216 }
 217
 218 static void __gv2c_array(GVariantIter *gv, mm_resource_manager_dmn_res_request_s **c)
 219 {
 220         int i;
 221         mm_resource_manager_dmn_res_request_s *rs;
 222
 223         rs = (mm_resource_manager_dmn_res_request_s *)
 224                         g_malloc0_n(g_variant_iter_n_children(gv), sizeof(*rs));
 225         for (i = 0; g_variant_iter_next(gv, "(ii)", &rs[i].type, &rs[i].volume); i++) {
 226                 if (rs[i].type != MM_RESOURCE_MANAGER_NO_RES)
 227                         MM_RM_DEBUG("(type, vol) = (%d, %d)", rs[i].type, rs[i].volume);
 228         }
 229
 230         *c = rs;
 231 }
 232
 233 static gboolean on_get_conf(MMResourceManager *interface,
 234                 GDBusMethodInvocation *invocation, gpointer user_data)
 235 {
 236         int i, j;
 237         gint error = 0;
 238         mm_resource_manager_res_volume *max_volume = NULL;
 239         mm_resource_manager_condition_volume_a *cond_volume = NULL;
 240         int *max_instance = NULL;
 241         GVariantBuilder *res_type_builder;
 242         GVariantBuilder *res_cond_builder;
 243         GVariantBuilder *res_instance_builder;
 244         GVariant *res_type_conf;
 245         GVariant *res_cond_conf;
 246         GVariant *res_instance_conf;
 247
 248         error = _mmrm_dmn_dbus_get_conf(&max_volume, &cond_volume, &max_instance);
 249
 250         res_type_builder = g_variant_builder_new(G_VARIANT_TYPE_ARRAY);
 251         for (i = 0; i < MM_RESOURCE_MANAGER_RES_TYPE_MAX; i++)
 252                 g_variant_builder_add_value(res_type_builder, g_variant_new("i", max_volume[i]));
 253
 254         res_type_conf = g_variant_builder_end(res_type_builder);
 255         g_variant_builder_unref(res_type_builder);
 256
 257         res_type_builder = g_variant_builder_new(G_VARIANT_TYPE_ARRAY);
 258         for (i = 0; i < MM_RESOURCE_MANAGER_RES_TYPE_MAX; i++) {
 259                 res_cond_builder = g_variant_builder_new(G_VARIANT_TYPE_ARRAY);
 260                 for (j = 0; j < MM_RESOURCE_MANAGER_RES_TYPE_COND_MAX; j++)
 261                         g_variant_builder_add_value(res_cond_builder, g_variant_new("i", (*cond_volume)[i][j]));
 262
 263                 g_variant_builder_add_value(res_type_builder, g_variant_builder_end(res_cond_builder));
 264                 g_variant_builder_unref(res_cond_builder);
 265         }
 266         res_cond_conf = g_variant_builder_end(res_type_builder);
 267         g_variant_builder_unref(res_type_builder);
 268
 269         res_instance_builder = g_variant_builder_new(G_VARIANT_TYPE_ARRAY);
 270         for (i = 0; i < MM_RESOURCE_MANAGER_RES_TYPE_MAX; i++)
 271                 g_variant_builder_add_value(res_instance_builder, g_variant_new("i", max_instance[i]));
 272         res_instance_conf = g_variant_builder_end(res_instance_builder);
 273         g_variant_builder_unref(res_instance_builder);
 274
 275         mmresource_manager_complete_conf(interface, invocation, error, res_type_conf, res_cond_conf, res_instance_conf);
 276
 277         return TRUE;
 278 }
 279
 280 static gboolean on_create_handle(MMResourceManager *interface,
 281                 GDBusMethodInvocation *invocation, const gint app_class,
 282                 gpointer user_data)
 283 {
 284         guint64 id = 0;
 285         gint error = 0;
 286
 287         error = _mmrm_dmn_dbus_create(app_class, &id);
 288
 289         MM_RM_DEBUG("Receive create message for RM");
 290
 291         mmresource_manager_complete_create(interface, invocation, id, error);
 292
 293         return TRUE;
 294 }
 295
 296 static gboolean on_destroy_handle(MMResourceManager *interface,
 297                 GDBusMethodInvocation *invocation, const guint64 id, gpointer user_data)
 298 {
 299         gint error = 0;
 300
 301         MM_RM_DEBUG("Receive destroy message for RM");
 302         error = _mmrm_dmn_dbus_destroy(id);
 303
 304         mmresource_manager_complete_destroy(interface, invocation, error);
 305         return TRUE;
 306 }
 307
 308 static gboolean on_commit_handle(MMResourceManager *interface,
 309                 GDBusMethodInvocation *invocation, const guint64 id,
 310                 GVariant *release, GVariant *acquire, gpointer user_data)
 311 {
 312         gint error = 0;
 313         gboolean *flags;
 314         GVariantBuilder *flags_builder;
 315         GVariant *not_acquired_flags;
 316         GVariantIter *release_array;
 317         GVariantIter *acquire_array;
 318         gsize acquire_len;
 319         gint i;
 320
 321         MM_RM_DEBUG("Receive commit message");
 322
 323         release_array = g_variant_iter_new(release);
 324         acquire_array = g_variant_iter_new(acquire);
 325         acquire_len = g_variant_iter_n_children(acquire_array);
 326
 327         error = _mmrm_dmn_dbus_commit(id, release_array, acquire_array, &flags);
 328
 329         flags_builder = g_variant_builder_new(G_VARIANT_TYPE_ARRAY);
 330         for (i = 0; i < acquire_len; i++)
 331                 g_variant_builder_add_value(flags_builder, g_variant_new("b", flags[i]));
 332         not_acquired_flags = g_variant_builder_end(flags_builder);
 333         mmresource_manager_complete_commit(interface, invocation, error, not_acquired_flags);
 334
 335         g_free(flags);
 336         g_variant_builder_unref(flags_builder);
 337         g_variant_iter_free(release_array);
 338         g_variant_iter_free(acquire_array);
 339
 340         return TRUE;
 341 }
 342
 343 static void on_bus_acquired(GDBusConnection *connection, const gchar *name,
 344                 gpointer user_data)
 345 {
 346         GError *error = NULL;
 347         MM_RM_DEBUG("name of bus = %s, userID = %d", name, getuid());
 348
 349         g_signal_connect(interface, "handle-conf", G_CALLBACK(on_get_conf), NULL);
 350         g_signal_connect(interface, "handle-create", G_CALLBACK(on_create_handle), NULL);
 351         g_signal_connect(interface, "handle-destroy", G_CALLBACK(on_destroy_handle), NULL);
 352         g_signal_connect(interface, "handle-commit", G_CALLBACK(on_commit_handle), NULL);
 353
 354         if (!g_dbus_interface_skeleton_export(G_DBUS_INTERFACE_SKELETON(interface),
 355                         connection, RMD_GDBUS_PATH, &error)) {
 356                 MM_RM_ERROR("failed to export interface. msg : %s", error->message);
 357                 g_error_free(error);
 358                 return;
 359         }
 360
 361         MM_RM_RETM_IF(!_create_daemon_setup_file(), "Daemon cannot create setup file");
 362 }