src/pims-ipc-worker.c

   1 /*
   2  * PIMS IPC
   3  *
   4  * Copyright (c) 2012 - 2016 Samsung Electronics Co., Ltd. All rights reserved.
   5  *
   6  * Licensed under the Apache License, Version 2.0 (the License);
   7  * you may not use this file except in compliance with the License.
   8  * You may obtain a copy of the License at
   9  *
  10  * http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  * Unless required by applicable law or agreed to in writing, software
  13  * distributed under the License is distributed on an AS IS BASIS,
  14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  * See the License for the specific language governing permissions and
  16  * limitations under the License.
  17  */
  18
  19 #include <pthread.h>
  20 #include <stdlib.h>
  21 #include <unistd.h>
  22 #include <poll.h>
  23 #include <sys/types.h>
  24 #include <sys/socket.h>
  25 #include <sys/eventfd.h>
  26 #include <fcntl.h>
  27 #include <glib.h>
  28
  29 #include "pims-internal.h"
  30 #include "pims-ipc-data-internal.h"
  31 #include "pims-ipc-data.h"
  32 #include "pims-socket.h"
  33 #include "pims-ipc-utils.h"
  34 #include "pims-ipc-worker.h"
  35
  36 #define PIMS_IPC_WORKER_THREAD_WAIT_TIME 100 /* milliseconds */
  37
  38 typedef struct {
  39         pims_ipc_svc_client_disconnected_cb callback;
  40         void * user_data;
  41 } pims_ipc_svc_client_disconnected_cb_t;
  42
  43 /* idle_worker_pool SHOULD handle on main thread */
  44 static GList *idle_worker_pool;
  45 static GHashTable *worker_cb_table; /* call_id, cb_data */
  46 static __thread pims_ipc_svc_client_disconnected_cb_t _client_disconnected_cb = {NULL, NULL};
  47
  48 static int unique_sequence_number;
  49 static GHashTable *worker_client_info_map; /* key : worker_id, data : pims_ipc_client_info_s* */
  50 static int client_register_info(pims_ipc_worker_data_s *worker_data, int client_pid);
  51 static pthread_mutex_t _worker_client_mutex = PTHREAD_MUTEX_INITIALIZER; /* for worker_client_info_map */
  52
  53 int worker_wait_idle_worker_ready(pims_ipc_worker_data_s *worker_data)
  54 {
  55         struct timespec timeout = {0};
  56
  57         clock_gettime(CLOCK_REALTIME, &timeout);
  58         timeout.tv_nsec += PIMS_IPC_WORKER_THREAD_WAIT_TIME * 1000000;
  59         timeout.tv_sec += timeout.tv_nsec / 1000000000L;
  60         timeout.tv_nsec = timeout.tv_nsec % 1000000000L;
  61
  62         pthread_mutex_lock(&worker_data->ready_mutex);
  63
  64         if (!worker_data->fd) {
  65                 WARN("worker fd is null, wait until worker thread create done.");
  66                 if (pthread_cond_timedwait(&worker_data->ready, &worker_data->ready_mutex, &timeout)) {
  67                         ERR("Get idle worker timeout Fail!");
  68                         pthread_mutex_unlock(&worker_data->ready_mutex);
  69                         return -1;
  70                 }
  71         }
  72
  73         pthread_mutex_unlock(&worker_data->ready_mutex);
  74         return 0;
  75 }
  76
  77 pims_ipc_worker_data_s* worker_get_idle_worker(pims_ipc_svc_s *ipc_svc,
  78                 const char *client_id)
  79 {
  80         pims_ipc_worker_data_s *worker_data;
  81
  82         RETV_IF(NULL == client_id, NULL);
  83         RETVM_IF(NULL == idle_worker_pool, NULL, "There is no idle worker");
  84
  85         worker_data = g_hash_table_lookup(ipc_svc->client_worker_map, client_id);
  86         if (worker_data)
  87                 return worker_data;
  88
  89         worker_data = idle_worker_pool->data;
  90
  91         idle_worker_pool = g_list_delete_link(idle_worker_pool, idle_worker_pool);
  92
  93         if (worker_data)
  94                 g_hash_table_insert(ipc_svc->client_worker_map, g_strdup(client_id), worker_data);
  95
  96         return worker_data;
  97 }
  98
  99 pims_ipc_worker_data_s* worker_find(pims_ipc_svc_s *ipc_svc, const char *client_id)
 100 {
 101         pims_ipc_worker_data_s *worker_data;
 102
 103         RETV_IF(NULL == client_id, NULL);
 104
 105         if (FALSE == g_hash_table_lookup_extended(ipc_svc->client_worker_map, client_id,
 106                                 NULL, (gpointer*)&worker_data)) {
 107                 ERR("g_hash_table_lookup_extended(%s) Fail", client_id);
 108                 return NULL;
 109         }
 110
 111         return worker_data;
 112 }
 113
 114 void worker_stop_client_worker(pims_ipc_svc_s *ipc_svc, const char *client_id)
 115 {
 116         pims_ipc_worker_data_s *worker_data;
 117
 118         worker_data = worker_find(ipc_svc, client_id);
 119
 120         /* remove client_fd */
 121         g_hash_table_remove(ipc_svc->client_worker_map, client_id);
 122
 123         /* stop worker thread */
 124         if (worker_data) {
 125                 worker_data->stop_thread = TRUE;
 126                 worker_data->client_fd = -1;
 127                 write_command(worker_data->fd, 1);
 128                 DBG("write command to worker terminate(worker_fd:%d)", worker_data->fd);
 129         }
 130 }
 131
 132
 133 void worker_free_raw_data(void *data)
 134 {
 135         pims_ipc_raw_data_s *raw_data = data;
 136
 137         if (NULL == raw_data)
 138                 return;
 139
 140         free(raw_data->client_id);
 141         free(raw_data->call_id);
 142         free(raw_data->data);
 143         free(raw_data);
 144 }
 145
 146 void worker_free_data(gpointer data)
 147 {
 148         pims_ipc_worker_data_s *worker_data = data;
 149
 150         pthread_mutex_lock(&worker_data->queue_mutex);
 151         if (worker_data->list)
 152                 g_list_free_full(worker_data->list, worker_free_raw_data);
 153         pthread_mutex_unlock(&worker_data->queue_mutex);
 154
 155         pthread_cond_destroy(&worker_data->ready);
 156         pthread_mutex_destroy(&worker_data->ready_mutex);
 157
 158         free(worker_data);
 159 }
 160
 161
 162 int worker_push_raw_data(pims_ipc_worker_data_s *worker_data, int client_fd,
 163                 pims_ipc_raw_data_s *data)
 164 {
 165         pthread_mutex_lock(&worker_data->queue_mutex);
 166         worker_data->list = g_list_append(worker_data->list, data);
 167         worker_data->client_fd = client_fd;
 168         pthread_mutex_unlock(&worker_data->queue_mutex);
 169
 170         return TRUE;
 171 }
 172
 173 static gboolean worker_pop_raw_data(pims_ipc_worker_data_s *worker,
 174                 pims_ipc_raw_data_s **data)
 175 {
 176         if (!worker)
 177                 return FALSE;
 178
 179         pthread_mutex_lock(&worker->queue_mutex);
 180         if (!worker->list) {
 181                 pthread_mutex_unlock(&worker->queue_mutex);
 182                 *data = NULL;
 183                 return FALSE;
 184         }
 185
 186         *data = g_list_first(worker->list)->data;
 187         worker->list = g_list_delete_link(worker->list, g_list_first(worker->list));
 188         pthread_mutex_unlock(&worker->queue_mutex);
 189
 190         return TRUE;
 191 }
 192
 193 int worker_set_callback(char *call_id, pims_ipc_svc_cb_s *cb_data)
 194 {
 195         return g_hash_table_insert(worker_cb_table, call_id, cb_data);
 196 }
 197
 198 static void __run_callback(int client_pid, char *call_id, pims_ipc_data_h dhandle_in,
 199                 pims_ipc_data_h *dhandle_out)
 200 {
 201         pims_ipc_svc_cb_s *cb_data = NULL;
 202
 203         VERBOSE("Call id [%s]", call_id);
 204
 205         cb_data = g_hash_table_lookup(worker_cb_table, call_id);
 206         if (cb_data == NULL) {
 207                 VERBOSE("No Data for %s", call_id);
 208                 return;
 209         }
 210
 211         /* TODO: client_pid is not valide pims_ipc_h */
 212         cb_data->callback((pims_ipc_h)client_pid, dhandle_in, dhandle_out, cb_data->user_data);
 213 }
 214
 215 static void __make_raw_data(const char *call_id, int seq_no, pims_ipc_data_h data,
 216                 pims_ipc_raw_data_s **out)
 217 {
 218         pims_ipc_data_s *data_in = data;
 219         pims_ipc_raw_data_s *raw_data = NULL;
 220
 221         RET_IF(NULL == out);
 222         RET_IF(NULL == call_id);
 223
 224         raw_data = calloc(1, sizeof(pims_ipc_raw_data_s));
 225         if (NULL == raw_data) {
 226                 ERR("calloc() Fail(%d)", errno);
 227                 return;
 228         }
 229
 230         raw_data->call_id = g_strdup(call_id);
 231         raw_data->call_id_len = strlen(raw_data->call_id);
 232         raw_data->seq_no = seq_no;
 233
 234         if (data_in && 0 < data_in->buf_size) {
 235                 raw_data->has_data = TRUE;
 236                 raw_data->data = calloc(1, data_in->buf_size+1);
 237                 if (NULL == raw_data->data) {
 238                         ERR("calloc() Fail");
 239                         free(raw_data->call_id);
 240                         free(raw_data);
 241                         return;
 242                 }
 243                 memcpy(raw_data->data, data_in->buf, data_in->buf_size);
 244                 raw_data->data_len = data_in->buf_size;
 245         } else {
 246                 raw_data->has_data = FALSE;
 247                 raw_data->data_len = 0;
 248                 raw_data->data = NULL;
 249         }
 250         *out = raw_data;
 251         return;
 252 }
 253
 254 static int __send_raw_data(int fd, const char *client_id, pims_ipc_raw_data_s *data)
 255 {
 256         int ret = 0;
 257         unsigned int len, total_len, client_id_len;
 258
 259         RETV_IF(NULL == data, -1);
 260         RETV_IF(NULL == client_id, -1);
 261
 262         client_id_len = strlen(client_id);
 263
 264         len = sizeof(total_len) + sizeof(client_id_len) + client_id_len + sizeof(data->seq_no)
 265                 + data->call_id_len + sizeof(data->call_id) + sizeof(data->has_data);
 266         total_len = len;
 267
 268         if (data->has_data) {
 269                 len += sizeof(data->data_len);
 270                 total_len = len + data->data_len;
 271         }
 272
 273         INFO("client_id: %s, call_id : %s, seq no :%d, len:%d, total len :%d", client_id,
 274                         data->call_id, data->seq_no, len, total_len);
 275
 276         int length = 0;
 277         char buf[len+1];
 278         memset(buf, 0x0, len+1);
 279
 280         memcpy(buf, &total_len, sizeof(total_len));
 281         length += sizeof(total_len);
 282
 283         memcpy(buf+length, &client_id_len, sizeof(client_id_len));
 284         length += sizeof(client_id_len);
 285         memcpy(buf+length, client_id, client_id_len);
 286         length += client_id_len;
 287
 288         memcpy(buf+length, &(data->seq_no), sizeof(data->seq_no));
 289         length += sizeof(data->seq_no);
 290
 291         memcpy(buf+length, &(data->call_id_len), sizeof(data->call_id_len));
 292         length += sizeof(data->call_id_len);
 293         memcpy(buf+length, data->call_id, data->call_id_len);
 294         length += data->call_id_len;
 295
 296         memcpy(buf+length, &(data->has_data), sizeof(data->has_data));
 297         length += sizeof(data->has_data);
 298
 299         if (data->has_data) {
 300                 memcpy(buf+length, &(data->data_len), sizeof(data->data_len));
 301                 length += sizeof(data->data_len);
 302                 ret = socket_send(fd, buf, length);
 303
 304                 /* send data */
 305                 if (ret > 0)
 306                         ret += socket_send_data(fd, data->data, data->data_len);
 307         } else {
 308                 ret = socket_send(fd, buf, length);
 309         }
 310
 311         return ret;
 312 }
 313
 314 static int _get_pid_from_fd(int fd)
 315 {
 316         struct ucred uc;
 317         socklen_t uc_len = sizeof(uc);
 318
 319         if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &uc, &uc_len) < 0)
 320                 ERR("getsockopt() Failed(%d)", errno);
 321
 322         DBG("Client PID(%d)", uc.pid);
 323         return uc.pid;
 324 }
 325
 326 static int __worker_loop_handle_raw_data(pims_ipc_worker_data_s *worker_data)
 327 {
 328         int disconnected = FALSE;
 329         pims_ipc_data_h data_in = NULL;
 330         pims_ipc_data_h data_out = NULL;
 331         pims_ipc_raw_data_s *result = NULL;
 332         pims_ipc_raw_data_s *raw_data = NULL;
 333
 334         if (FALSE == worker_pop_raw_data(worker_data, &raw_data))
 335                 return disconnected;
 336
 337         int client_pid = _get_pid_from_fd(worker_data->client_fd);
 338
 339         if (UTILS_STR_EQUAL == strcmp(PIMS_IPC_CALL_ID_CREATE, raw_data->call_id)) {
 340                 client_register_info(worker_data, client_pid);
 341
 342         } else if (UTILS_STR_EQUAL == strcmp(PIMS_IPC_CALL_ID_DESTROY, raw_data->call_id)) {
 343                 disconnected = TRUE;
 344         } else {
 345                 data_in = pims_ipc_data_steal_unmarshal(raw_data->data, raw_data->data_len);
 346
 347                 __run_callback(client_pid, raw_data->call_id, data_in, &data_out);
 348                 pims_ipc_data_destroy(data_in);
 349         }
 350
 351         if (data_out) {
 352                 __make_raw_data(raw_data->call_id, raw_data->seq_no, data_out, &result);
 353                 pims_ipc_data_destroy(data_out);
 354         } else
 355                 __make_raw_data(raw_data->call_id, raw_data->seq_no, NULL, &result);
 356
 357         if (worker_data->client_fd != -1)
 358                 __send_raw_data(worker_data->client_fd, raw_data->client_id, result);
 359         worker_free_raw_data(raw_data);
 360         worker_free_raw_data(result);
 361
 362         return disconnected;
 363 }
 364
 365 static void* __worker_loop(void *data)
 366 {
 367         int ret;
 368         pthread_t pid;
 369         int worker_fd;
 370         int disconnected = FALSE;
 371         pims_ipc_worker_data_s *worker_data = data;
 372
 373         RETV_IF(NULL == data, NULL);
 374
 375         worker_fd = eventfd(0, 0);
 376         if (worker_fd == -1)
 377                 return NULL;
 378
 379         INFO("worker Created ********** worker_fd = %d ***********", worker_fd);
 380
 381         pid = pthread_self();
 382         worker_data->client_fd = -1;
 383         worker_data->stop_thread = FALSE;
 384         pthread_mutex_lock(&worker_data->ready_mutex);
 385         worker_data->fd = worker_fd;
 386         pthread_cond_signal(&worker_data->ready);
 387         pthread_mutex_unlock(&worker_data->ready_mutex);
 388
 389         struct pollfd pollfds[1];
 390         pollfds[0].fd = worker_fd;
 391         pollfds[0].events = POLLIN;
 392         pollfds[0].revents = 0;
 393
 394         while (!worker_data->stop_thread) {
 395                 ret = poll(pollfds, 1, 3000); /* waiting command from router */
 396                 if (-1 == ret) {
 397                         if (errno != EINTR)
 398                                 ERR("poll() Fail(%d)", errno);
 399                         continue;
 400                 }
 401                 if (worker_data->stop_thread)
 402                         break;
 403
 404                 if (0 == ret)
 405                         continue;
 406
 407                 if (pollfds[0].revents & POLLIN) {
 408                         uint64_t dummy;
 409                         read_command(pollfds[0].fd, &dummy);
 410
 411                         disconnected = __worker_loop_handle_raw_data(worker_data);
 412                 }
 413         }
 414
 415         if (!disconnected)
 416                 ERR("client fd closed, worker_fd : %d", worker_fd);
 417         INFO("task thread terminated --------------------------- (worker_fd : %d)", worker_fd);
 418
 419         int flag = fcntl(worker_data->client_fd, F_GETFL, 0);
 420         if (0 == (FD_CLOEXEC & flag)) {
 421                 int client_pid = _get_pid_from_fd(worker_data->client_fd);
 422                 pthread_mutex_lock(&_worker_client_mutex);
 423                 g_hash_table_remove(worker_client_info_map, GINT_TO_POINTER(client_pid));
 424                 DBG("client pid(%u) is removed", client_pid);
 425                 pthread_mutex_unlock(&_worker_client_mutex);
 426         } else {
 427                 DBG("fd(%d) is already closed", worker_data->client_fd);
 428         }
 429
 430         worker_free_data(worker_data);
 431         close(worker_fd);
 432
 433         if (_client_disconnected_cb.callback)
 434                 _client_disconnected_cb.callback((pims_ipc_h)pid, _client_disconnected_cb.user_data);
 435
 436         return NULL;
 437 }
 438
 439 void worker_start_idle_worker(pims_ipc_svc_s *ipc_data)
 440 {
 441         int i;
 442         pims_ipc_worker_data_s *worker_data;
 443
 444         for (i = g_list_length(idle_worker_pool); i < ipc_data->workers_max_count; i++) {
 445                 worker_data = calloc(1, sizeof(pims_ipc_worker_data_s));
 446                 if (NULL == worker_data) {
 447                         ERR("calloc() Fail(%d)", errno);
 448                         continue;
 449                 }
 450                 pthread_mutex_init(&worker_data->queue_mutex, 0);
 451                 pthread_mutex_init(&worker_data->ready_mutex, NULL);
 452                 pthread_cond_init(&worker_data->ready, NULL);
 453
 454                 utils_launch_thread(__worker_loop, worker_data);
 455                 idle_worker_pool = g_list_append(idle_worker_pool, worker_data);
 456         }
 457 }
 458
 459 void worker_stop_idle_worker()
 460 {
 461         GList *cursor;
 462         pims_ipc_worker_data_s *worker_data;
 463
 464         cursor = idle_worker_pool;
 465         while (cursor) {
 466                 worker_data = cursor->data;
 467                 worker_data->stop_thread = TRUE;
 468                 write_command(worker_data->fd, 1);
 469                 cursor = cursor->next;
 470         }
 471 }
 472
 473 void worker_init()
 474 {
 475         worker_cb_table = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, g_free);
 476         WARN_IF(NULL == worker_cb_table, "worker cb table is NULL");
 477 }
 478
 479 void worker_deinit()
 480 {
 481         g_list_free(idle_worker_pool);
 482         idle_worker_pool = NULL;
 483
 484         g_hash_table_destroy(worker_cb_table);
 485         worker_cb_table = NULL;
 486 }
 487
 488 API void pims_ipc_svc_set_client_disconnected_cb(
 489                 pims_ipc_svc_client_disconnected_cb callback, void *user_data)
 490 {
 491         if (_client_disconnected_cb.callback) {
 492                 ERR("already registered");
 493                 return;
 494         }
 495         _client_disconnected_cb.callback = callback;
 496         _client_disconnected_cb.user_data = user_data;
 497 }
 498
 499 void client_destroy_info(gpointer p)
 500 {
 501         pims_ipc_client_info_s *client_info = p;
 502
 503         if (NULL == client_info)
 504                 return;
 505         free(client_info->smack);
 506         free(client_info->uid);
 507         free(client_info->client_session);
 508         free(client_info);
 509 }
 510
 511 void client_init(void)
 512 {
 513         pthread_mutex_init(&_worker_client_mutex, 0);
 514
 515         pthread_mutex_lock(&_worker_client_mutex);
 516         unique_sequence_number = 0;
 517         if (worker_client_info_map) {
 518                 ERR("worker_client_info_map already exists");
 519                 pthread_mutex_unlock(&_worker_client_mutex);
 520                 return;
 521         }
 522
 523         worker_client_info_map = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL,
 524                         client_destroy_info);
 525         pthread_mutex_unlock(&_worker_client_mutex);
 526 }
 527
 528 void client_deinit(void)
 529 {
 530         DBG("----------destroied");
 531         pthread_mutex_lock(&_worker_client_mutex);
 532         g_hash_table_destroy(worker_client_info_map);
 533         worker_client_info_map = NULL;
 534         pthread_mutex_unlock(&_worker_client_mutex);
 535         pthread_mutex_destroy(&_worker_client_mutex);
 536 }
 537
 538 static int _create_client_info(int fd, pims_ipc_client_info_s **p_client_info)
 539 {
 540         int ret;
 541         pid_t pid;
 542         char errmsg[1024] = {0};
 543
 544         pims_ipc_client_info_s *client_info = calloc(1, sizeof(pims_ipc_client_info_s));
 545         if (NULL == client_info) {
 546                 ERR("calloc() return NULL");
 547                 return -1;
 548         }
 549
 550         ret = cynara_creds_socket_get_client(fd, CLIENT_METHOD_SMACK, &(client_info->smack));
 551         if (CYNARA_API_SUCCESS != ret) {
 552                 cynara_strerror(ret, errmsg, sizeof(errmsg));
 553                 ERR("cynara_creds_socket_get_client() Fail(%d,%s)", ret, errmsg);
 554                 client_destroy_info(client_info);
 555                 return -1;
 556         }
 557
 558         ret = cynara_creds_socket_get_user(fd, USER_METHOD_UID, &(client_info->uid));
 559         if (CYNARA_API_SUCCESS != ret) {
 560                 cynara_strerror(ret, errmsg, sizeof(errmsg));
 561                 ERR("cynara_creds_socket_get_user() Fail(%d,%s)", ret, errmsg);
 562                 client_destroy_info(client_info);
 563                 return -1;
 564         }
 565
 566         ret = cynara_creds_socket_get_pid(fd, &pid);
 567         if (CYNARA_API_SUCCESS != ret) {
 568                 cynara_strerror(ret, errmsg, sizeof(errmsg));
 569                 ERR("cynara_creds_socket_get_pid() Fail(%d,%s)", ret, errmsg);
 570                 client_destroy_info(client_info);
 571                 return -1;
 572         }
 573
 574         client_info->client_session = cynara_session_from_pid(pid);
 575         if (NULL == client_info->client_session) {
 576                 ERR("cynara_session_from_pid() return NULL");
 577                 client_destroy_info(client_info);
 578                 return -1;
 579         }
 580         *p_client_info = client_info;
 581
 582         return 0;
 583 }
 584
 585 static int client_register_info(pims_ipc_worker_data_s *worker_data, int client_pid)
 586 {
 587         pims_ipc_client_info_s *client_info = NULL;
 588         int ret = 0;
 589
 590         ret = _create_client_info(worker_data->client_fd, &client_info);
 591         if (ret < 0) {
 592                 ERR("_create_client_info() Fail(%d)", ret);
 593                 return -1;
 594         }
 595         pthread_mutex_lock(&_worker_client_mutex);
 596         g_hash_table_insert(worker_client_info_map, GINT_TO_POINTER(client_pid), client_info);
 597         DBG("-------inserted:pid(%d), info(%p)", client_pid, client_info);
 598         pthread_mutex_unlock(&_worker_client_mutex);
 599
 600         return 0;
 601 }
 602
 603 int client_get_unique_sequence_number(void)
 604 {
 605         return unique_sequence_number++;
 606 }
 607
 608 pims_ipc_client_info_s* client_clone_info(pims_ipc_client_info_s *client_info)
 609 {
 610         if (NULL == client_info) {
 611                 ERR("client_info is NULL");
 612                 return NULL;
 613         }
 614
 615         pims_ipc_client_info_s *clone = calloc(1, sizeof(pims_ipc_client_info_s));
 616         if (NULL == clone) {
 617                 ERR("calloc() Fail");
 618                 return NULL;
 619         }
 620
 621         if (client_info->smack) {
 622                 clone->smack = strdup(client_info->smack);
 623                 if (NULL == clone->smack) {
 624                         ERR("strdup() Fail");
 625                         client_destroy_info(clone);
 626                         return NULL;
 627                 }
 628         }
 629
 630         if (client_info->uid) {
 631                 clone->uid = strdup(client_info->uid);
 632                 if (NULL == clone->uid) {
 633                         ERR("strdup() Fail");
 634                         client_destroy_info(clone);
 635                         return NULL;
 636                 }
 637         }
 638
 639         if (client_info->client_session) {
 640                 clone->client_session = strdup(client_info->client_session);
 641                 if (NULL == clone->client_session) {
 642                         ERR("strdup() Fail");
 643                         client_destroy_info(clone);
 644                         return NULL;
 645                 }
 646         }
 647
 648         return clone;
 649 }
 650
 651 pims_ipc_client_info_s* client_get_info(int client_pid)
 652 {
 653         pims_ipc_client_info_s *client_info = NULL;
 654
 655         pthread_mutex_lock(&_worker_client_mutex);
 656         client_info = g_hash_table_lookup(worker_client_info_map, GINT_TO_POINTER(client_pid));
 657         pthread_mutex_unlock(&_worker_client_mutex);
 658         DBG("Get client_info(%p) from pid(%d)", client_info, client_pid);
 659         return client_info;
 660 }
 661