VNFs/DPPD-PROX/main.c

   1 /*
   2 // Copyright (c) 2010-2017 Intel Corporation
   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 <string.h>
  18 #include <locale.h>
  19 #include <unistd.h>
  20 #include <signal.h>
  21
  22 #include <rte_cycles.h>
  23 #include <rte_atomic.h>
  24 #include <rte_table_hash.h>
  25 #include <rte_memzone.h>
  26 #include <rte_errno.h>
  27
  28 #include "prox_malloc.h"
  29 #include "run.h"
  30 #include "main.h"
  31 #include "log.h"
  32 #include "quit.h"
  33 #include "clock.h"
  34 #include "defines.h"
  35 #include "version.h"
  36 #include "prox_args.h"
  37 #include "prox_assert.h"
  38 #include "prox_cfg.h"
  39 #include "prox_shared.h"
  40 #include "prox_port_cfg.h"
  41 #include "toeplitz.h"
  42 #include "hash_utils.h"
  43 #include "handle_lb_net.h"
  44 #include "prox_cksum.h"
  45 #include "thread_nop.h"
  46 #include "thread_generic.h"
  47 #include "thread_pipeline.h"
  48 #include "cqm.h"
  49 #include "handle_master.h"
  50
  51 #if RTE_VERSION < RTE_VERSION_NUM(1,8,0,0)
  52 #define RTE_CACHE_LINE_SIZE CACHE_LINE_SIZE
  53 #endif
  54
  55 uint8_t lb_nb_txrings = 0xff;
  56 struct rte_ring *ctrl_rings[RTE_MAX_LCORE*MAX_TASKS_PER_CORE];
  57
  58 static void __attribute__((noreturn)) prox_usage(const char *prgname)
  59 {
  60         plog_info("\nUsage: %s [-f CONFIG_FILE] [-a|-e] [-m|-s|-i] [-w DEF] [-u] [-t]\n"
  61                   "\t-f CONFIG_FILE : configuration file to load, ./prox.cfg by default\n"
  62                   "\t-l LOG_FILE : log file name, ./prox.log by default\n"
  63                   "\t-p : include PID in log file name if default log file is used\n"
  64                   "\t-o DISPLAY: Set display to use, can be 'curses' (default), 'cli' or 'none'\n"
  65                   "\t-v verbosity : initial logging verbosity\n"
  66                   "\t-a : autostart all cores (by default)\n"
  67                   "\t-e : don't autostart\n"
  68                   "\t-n : Create NULL devices instead of using PCI devices, useful together with -i\n"
  69                   "\t-m : list supported task modes and exit\n"
  70                   "\t-s : check configuration file syntax and exit\n"
  71                   "\t-i : check initialization sequence and exit\n"
  72                   "\t-u : Listen on UDS /tmp/prox.sock\n"
  73                   "\t-t : Listen on TCP port 8474\n"
  74                   "\t-q : Pass argument to Lua interpreter, useful to define variables\n"
  75                   "\t-w : define variable using syntax varname=value\n"
  76                   "\t     takes precedence over variables defined in CONFIG_FILE\n"
  77                   "\t-k : Log statistics to file \"stats_dump\" in current directory\n"
  78                   "\t-d : Run as daemon, the parent process will block until PROX is not initialized\n"
  79                   "\t-z : Ignore CPU topology, implies -i\n"
  80                   "\t-r : Change initial screen refresh rate. If set to a lower than 0.001 seconds,\n"
  81                   "\t     screen refreshing will be disabled\n"
  82                   , prgname);
  83         exit(EXIT_FAILURE);
  84 }
  85
  86 static void check_mixed_normal_pipeline(void)
  87 {
  88         struct lcore_cfg *lconf = NULL;
  89         uint32_t lcore_id = -1;
  90
  91         while (prox_core_next(&lcore_id, 0) == 0) {
  92                 lconf = &lcore_cfg[lcore_id];
  93
  94                 int all_thread_nop = 1;
  95                 int generic = 0;
  96                 int pipeline = 0;
  97                 int l3 = 0;
  98                 for (uint8_t task_id = 0; task_id < lconf->n_tasks_all; ++task_id) {
  99                         struct task_args *targ = &lconf->targs[task_id];
 100                         l3 = !strcmp("l3", targ->sub_mode_str);
 101                         all_thread_nop = all_thread_nop && !l3 &&
 102                                 targ->task_init->thread_x == thread_nop;
 103
 104                         pipeline = pipeline || targ->task_init->thread_x == thread_pipeline;
 105                         generic = generic || targ->task_init->thread_x == thread_generic || l3;
 106                 }
 107                 PROX_PANIC(generic && pipeline, "Can't run both pipeline and normal thread on same core\n");
 108
 109                 if (all_thread_nop)
 110                         lconf->thread_x = thread_nop;
 111                 else {
 112                         lconf->thread_x = thread_generic;
 113                 }
 114         }
 115 }
 116
 117 static void check_zero_rx(void)
 118 {
 119         struct lcore_cfg *lconf = NULL;
 120         struct task_args *targ;
 121
 122         while (core_targ_next(&lconf, &targ, 0) == 0) {
 123                 if (targ->nb_rxports != 0) {
 124                         PROX_PANIC(task_init_flag_set(targ->task_init, TASK_FEATURE_NO_RX),
 125                            "\tCore %u task %u: rx_ports configured while mode %s does not use it\n", lconf->id, targ->id, targ->task_init->mode_str);
 126                 }
 127         }
 128 }
 129
 130 static void check_missing_rx(void)
 131 {
 132         struct lcore_cfg *lconf = NULL, *rx_lconf = NULL, *tx_lconf = NULL;
 133         struct task_args *targ, *rx_targ = NULL, *tx_targ = NULL;
 134         struct prox_port_cfg *port;
 135         uint8_t port_id, rx_port_id, ok;
 136
 137         while (core_targ_next(&lconf, &targ, 0) == 0) {
 138                 PROX_PANIC((targ->flags & TASK_ARG_RX_RING) && targ->rx_rings[0] == 0 && !targ->tx_opt_ring_task,
 139                            "Configuration Error - Core %u task %u Receiving from ring, but nobody xmitting to this ring\n", lconf->id, targ->id);
 140                 if (targ->nb_rxports == 0 && targ->nb_rxrings == 0) {
 141                         PROX_PANIC(!task_init_flag_set(targ->task_init, TASK_FEATURE_NO_RX),
 142                                    "\tCore %u task %u: no rx_ports and no rx_rings configured while required by mode %s\n", lconf->id, targ->id, targ->task_init->mode_str);
 143                 }
 144         }
 145
 146         lconf = NULL;
 147         while (core_targ_next(&lconf, &targ, 0) == 0) {
 148                 if (strcmp(targ->sub_mode_str, "l3") != 0)
 149                         continue;
 150
 151                 // If the L3 sub_mode receives from a port, check that there is at least one core/task
 152                 // transmitting to this port in L3 sub_mode
 153                 for (uint8_t i = 0; i < targ->nb_rxports; ++i) {
 154                         rx_port_id = targ->rx_port_queue[i].port;
 155                         ok = 0;
 156                         tx_lconf = NULL;
 157                         while (core_targ_next(&tx_lconf, &tx_targ, 0) == 0) {
 158                                 port = find_reachable_port(tx_targ);
 159                                 if (port == NULL)
 160                                         continue;
 161                                 port_id = port - prox_port_cfg;
 162                                 if ((rx_port_id == port_id) && (tx_targ->flags & TASK_ARG_L3)){
 163                                         ok = 1;
 164                                         break;
 165                                 }
 166                         }
 167                         PROX_PANIC(ok == 0, "RX L3 sub mode for port %d on core %d task %d, but no core/task transmitting on that port\n", rx_port_id, lconf->id, targ->id);
 168                 }
 169
 170                 // If the L3 sub_mode transmits to a port, check that there is at least one core/task
 171                 // receiving from that port in L3 sub_mode.
 172                 port = find_reachable_port(targ);
 173                 if (port == NULL)
 174                         continue;
 175                 port_id = port - prox_port_cfg;
 176                 rx_lconf = NULL;
 177                 ok = 0;
 178                 plog_info("\tCore %d task %d transmitting to port %d in L3 mode\n", lconf->id, targ->id, port_id);
 179                 while (core_targ_next(&rx_lconf, &rx_targ, 0) == 0) {
 180                         for (uint8_t i = 0; i < rx_targ->nb_rxports; ++i) {
 181                                 rx_port_id = rx_targ->rx_port_queue[i].port;
 182                                 if ((rx_port_id == port_id) && (rx_targ->flags & TASK_ARG_L3)){
 183                                         ok = 1;
 184                                         break;
 185                                 }
 186                         }
 187                         if (ok == 1) {
 188                                 plog_info("\tCore %d task %d has found core %d task %d receiving from port %d\n", lconf->id, targ->id, rx_lconf->id, rx_targ->id, port_id);
 189                                 break;
 190                         }
 191                 }
 192                 PROX_PANIC(ok == 0, "L3 sub mode for port %d on core %d task %d, but no core/task receiving on that port\n", port_id, lconf->id, targ->id);
 193         }
 194 }
 195
 196 static void check_cfg_consistent(void)
 197 {
 198         check_missing_rx();
 199         check_zero_rx();
 200         check_mixed_normal_pipeline();
 201 }
 202
 203 static void plog_all_rings(void)
 204 {
 205         struct lcore_cfg *lconf = NULL;
 206         struct task_args *targ;
 207
 208         while (core_targ_next(&lconf, &targ, 0) == 0) {
 209                 for (uint8_t ring_idx = 0; ring_idx < targ->nb_rxrings; ++ring_idx) {
 210                         plog_info("\tCore %u, task %u, rx_ring[%u] %p\n", lconf->id, targ->id, ring_idx, targ->rx_rings[ring_idx]);
 211                 }
 212         }
 213 }
 214
 215 static int chain_flag_state(struct task_args *targ, uint64_t flag, int is_set)
 216 {
 217         if (task_init_flag_set(targ->task_init, flag) == is_set)
 218                 return 1;
 219
 220         int ret = 0;
 221
 222         for (uint32_t i = 0; i < targ->n_prev_tasks; ++i) {
 223                 ret = chain_flag_state(targ->prev_tasks[i], flag, is_set);
 224                 if (ret)
 225                         return 1;
 226         }
 227         return 0;
 228 }
 229
 230 static void configure_if_tx_queues(struct task_args *targ, uint8_t socket)
 231 {
 232         uint8_t if_port;
 233
 234         for (uint8_t i = 0; i < targ->nb_txports; ++i) {
 235                 if_port = targ->tx_port_queue[i].port;
 236
 237                 PROX_PANIC(if_port == OUT_DISCARD, "port misconfigured, exiting\n");
 238
 239                 PROX_PANIC(!prox_port_cfg[if_port].active, "\tPort %u not used, skipping...\n", if_port);
 240
 241                 int dsocket = prox_port_cfg[if_port].socket;
 242                 if (dsocket != -1 && dsocket != socket) {
 243                         plog_warn("TX core on socket %d while device on socket %d\n", socket, dsocket);
 244                 }
 245
 246                 if (prox_port_cfg[if_port].tx_ring[0] == '\0') {  // Rings-backed port can use single queue
 247                         targ->tx_port_queue[i].queue = prox_port_cfg[if_port].n_txq;
 248                         prox_port_cfg[if_port].n_txq++;
 249                 } else {
 250                         prox_port_cfg[if_port].n_txq = 1;
 251                         targ->tx_port_queue[i].queue = 0;
 252                 }
 253                 /* Set the ETH_TXQ_FLAGS_NOREFCOUNT flag if none of
 254                    the tasks up to the task transmitting to the port
 255                    does not use refcnt. */
 256                 if (!chain_flag_state(targ, TASK_FEATURE_TXQ_FLAGS_REFCOUNT, 1)) {
 257                         prox_port_cfg[if_port].tx_conf.txq_flags |= ETH_TXQ_FLAGS_NOREFCOUNT;
 258                         plog_info("\t\tEnabling No refcnt on port %d\n", if_port);
 259                 }
 260                 else {
 261                         plog_info("\t\tRefcnt used on port %d\n", if_port);
 262                 }
 263
 264                 /* By default OFFLOAD is enabled, but if the whole
 265                    chain has NOOFFLOADS set all the way until the
 266                    first task that receives from a port, it will be
 267                    disabled for the destination port. */
 268                 if (chain_flag_state(targ, TASK_FEATURE_TXQ_FLAGS_NOOFFLOADS, 1)) {
 269                         prox_port_cfg[if_port].tx_conf.txq_flags |= ETH_TXQ_FLAGS_NOOFFLOADS;
 270                         plog_info("\t\tDisabling TX offloads on port %d\n", if_port);
 271                 } else {
 272                         plog_info("\t\tEnabling TX offloads on port %d\n", if_port);
 273                 }
 274
 275                 /* By default NOMULTSEGS is disabled, as drivers/NIC might split packets on RX
 276                    It should only be enabled when we know for sure that the RX does not split packets.
 277                    Set the ETH_TXQ_FLAGS_NOMULTSEGS flag if none of the tasks up to the task
 278                    transmitting to the port does not use multsegs. */
 279                 if (!chain_flag_state(targ, TASK_FEATURE_TXQ_FLAGS_NOMULTSEGS, 0)) {
 280                         prox_port_cfg[if_port].tx_conf.txq_flags |= ETH_TXQ_FLAGS_NOMULTSEGS;
 281                         plog_info("\t\tEnabling No MultiSegs on port %d\n", if_port);
 282                 }
 283                 else {
 284                         plog_info("\t\tMultiSegs used on port %d\n", if_port);
 285                 }
 286         }
 287 }
 288
 289 static void configure_if_rx_queues(struct task_args *targ, uint8_t socket)
 290 {
 291         for (int i = 0; i < targ->nb_rxports; i++) {
 292                 uint8_t if_port = targ->rx_port_queue[i].port;
 293
 294                 if (if_port == OUT_DISCARD) {
 295                         return;
 296                 }
 297
 298                 PROX_PANIC(!prox_port_cfg[if_port].active, "Port %u not used, aborting...\n", if_port);
 299
 300                 if(prox_port_cfg[if_port].rx_ring[0] != '\0') {
 301                         prox_port_cfg[if_port].n_rxq = 0;
 302                 }
 303
 304                 targ->rx_port_queue[i].queue = prox_port_cfg[if_port].n_rxq;
 305                 prox_port_cfg[if_port].pool[targ->rx_port_queue[i].queue] = targ->pool;
 306                 prox_port_cfg[if_port].pool_size[targ->rx_port_queue[i].queue] = targ->nb_mbuf - 1;
 307                 prox_port_cfg[if_port].n_rxq++;
 308
 309                 int dsocket = prox_port_cfg[if_port].socket;
 310                 if (dsocket != -1 && dsocket != socket) {
 311                         plog_warn("RX core on socket %d while device on socket %d\n", socket, dsocket);
 312                 }
 313         }
 314 }
 315
 316 static void configure_if_queues(void)
 317 {
 318         struct lcore_cfg *lconf = NULL;
 319         struct task_args *targ;
 320         uint8_t socket;
 321
 322         while (core_targ_next(&lconf, &targ, 0) == 0) {
 323                 socket = rte_lcore_to_socket_id(lconf->id);
 324
 325                 configure_if_tx_queues(targ, socket);
 326                 configure_if_rx_queues(targ, socket);
 327         }
 328 }
 329
 330 static const char *gen_ring_name(void)
 331 {
 332         static char retval[] = "XX";
 333         static const char* ring_names =
 334                 "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
 335                 "abcdefghijklmnopqrstuvwxyz"
 336                 "[\\]^_`!\"#$%&'()*+,-./:;<="
 337                 ">?@{|}0123456789";
 338         static int idx2 = 0;
 339
 340         int idx = idx2;
 341
 342         retval[0] = ring_names[idx % strlen(ring_names)];
 343         idx /= strlen(ring_names);
 344         retval[1] = idx ? ring_names[(idx - 1) % strlen(ring_names)] : 0;
 345
 346         idx2++;
 347
 348         return retval;
 349 }
 350
 351 struct ring_init_stats {
 352         uint32_t n_pkt_rings;
 353         uint32_t n_ctrl_rings;
 354         uint32_t n_opt_rings;
 355 };
 356
 357 static uint32_t ring_init_stats_total(const struct ring_init_stats *ris)
 358 {
 359         return ris->n_pkt_rings + ris->n_ctrl_rings + ris->n_opt_rings;
 360 }
 361
 362 static uint32_t count_incoming_tasks(uint32_t lcore_worker, uint32_t dest_task)
 363 {
 364         struct lcore_cfg *lconf = NULL;
 365         struct task_args *targ;
 366         uint32_t ret = 0;
 367         struct core_task ct;
 368
 369         while (core_targ_next(&lconf, &targ, 0) == 0) {
 370                 for (uint8_t idxx = 0; idxx < MAX_PROTOCOLS; ++idxx) {
 371                         for (uint8_t ridx = 0; ridx < targ->core_task_set[idxx].n_elems; ++ridx) {
 372                                 ct = targ->core_task_set[idxx].core_task[ridx];
 373
 374                                 if (dest_task == ct.task && lcore_worker == ct.core)
 375                                         ret++;
 376                         }
 377                 }
 378         }
 379         return ret;
 380 }
 381
 382 static struct rte_ring *get_existing_ring(uint32_t lcore_id, uint32_t task_id)
 383 {
 384         if (!prox_core_active(lcore_id, 0))
 385                 return NULL;
 386
 387         struct lcore_cfg *lconf = &lcore_cfg[lcore_id];
 388
 389         if (task_id >= lconf->n_tasks_all)
 390                 return NULL;
 391
 392         if (lconf->targs[task_id].nb_rxrings == 0)
 393                 return NULL;
 394
 395         return lconf->targs[task_id].rx_rings[0];
 396 }
 397
 398 static struct rte_ring *init_ring_between_tasks(struct lcore_cfg *lconf, struct task_args *starg,
 399                                     const struct core_task ct, uint8_t ring_idx, int idx,
 400                                     struct ring_init_stats *ris)
 401 {
 402         uint8_t socket;
 403         struct rte_ring *ring = NULL;
 404         struct lcore_cfg *lworker;
 405         struct task_args *dtarg;
 406
 407         PROX_ASSERT(prox_core_active(ct.core, 0));
 408         lworker = &lcore_cfg[ct.core];
 409
 410         /* socket used is the one that the sending core resides on */
 411         socket = rte_lcore_to_socket_id(lconf->id);
 412
 413         plog_info("\t\tCreating ring on socket %u with size %u\n"
 414                   "\t\t\tsource core, task and socket = %u, %u, %u\n"
 415                   "\t\t\tdestination core, task and socket = %u, %u, %u\n"
 416                   "\t\t\tdestination worker id = %u\n",
 417                   socket, starg->ring_size,
 418                   lconf->id, starg->id, socket,
 419                   ct.core, ct.task, rte_lcore_to_socket_id(ct.core),
 420                   ring_idx);
 421
 422         if (ct.type) {
 423                 struct rte_ring **dring = NULL;
 424
 425                 if (ct.type == CTRL_TYPE_MSG)
 426                         dring = &lworker->ctrl_rings_m[ct.task];
 427                 else if (ct.type == CTRL_TYPE_PKT) {
 428                         dring = &lworker->ctrl_rings_p[ct.task];
 429                         starg->flags |= TASK_ARG_CTRL_RINGS_P;
 430                 }
 431
 432                 if (*dring == NULL)
 433                         ring = rte_ring_create(gen_ring_name(), starg->ring_size, socket, RING_F_SC_DEQ);
 434                 else
 435                         ring = *dring;
 436                 PROX_PANIC(ring == NULL, "Cannot create ring to connect I/O core %u with worker core %u\n", lconf->id, ct.core);
 437
 438                 starg->tx_rings[starg->tot_n_txrings_inited] = ring;
 439                 starg->tot_n_txrings_inited++;
 440                 *dring = ring;
 441                 if (lconf->id == prox_cfg.master) {
 442                         ctrl_rings[ct.core*MAX_TASKS_PER_CORE + ct.task] = ring;
 443                 } else if (ct.core == prox_cfg.master) {
 444                         starg->ctrl_plane_ring = ring;
 445                 }
 446
 447                 plog_info("\t\tCore %u task %u to -> core %u task %u ctrl_ring %s %p %s\n",
 448                           lconf->id, starg->id, ct.core, ct.task, ct.type == CTRL_TYPE_PKT?
 449                           "pkt" : "msg", ring, ring->name);
 450                 ris->n_ctrl_rings++;
 451                 return ring;
 452         }
 453
 454         dtarg = &lworker->targs[ct.task];
 455         lworker->targs[ct.task].worker_thread_id = ring_idx;
 456         PROX_ASSERT(dtarg->flags & TASK_ARG_RX_RING);
 457         PROX_ASSERT(ct.task < lworker->n_tasks_all);
 458
 459         /* If all the following conditions are met, the ring can be
 460            optimized away. */
 461         if (!task_is_master(starg) && !task_is_master(dtarg) && starg->lconf->id == dtarg->lconf->id &&
 462             starg->nb_txrings == 1 && idx == 0 && dtarg->task &&
 463             dtarg->tot_rxrings == 1 && starg->task == dtarg->task - 1) {
 464                 plog_info("\t\tOptimizing away ring on core %u from task %u to task %u\n",
 465                           dtarg->lconf->id, starg->task, dtarg->task);
 466                 /* No need to set up ws_mbuf. */
 467                 starg->tx_opt_ring = 1;
 468                 /* During init of destination task, the buffer in the
 469                    source task will be initialized. */
 470                 dtarg->tx_opt_ring_task = starg;
 471                 ris->n_opt_rings++;
 472                 ++dtarg->nb_rxrings;
 473                 return NULL;
 474         }
 475
 476         int ring_created = 1;
 477         /* Only create multi-producer rings if configured to do so AND
 478            there is only one task sending to the task */
 479         if ((prox_cfg.flags & DSF_MP_RINGS && count_incoming_tasks(ct.core, ct.task) > 1)
 480                 || (prox_cfg.flags & DSF_ENABLE_BYPASS)) {
 481                 ring = get_existing_ring(ct.core, ct.task);
 482
 483                 if (ring) {
 484                         plog_info("\t\tCore %u task %u creatign MP ring %p to core %u task %u\n",
 485                                   lconf->id, starg->id, ring, ct.core, ct.task);
 486                         ring_created = 0;
 487                 }
 488                 else {
 489                         ring = rte_ring_create(gen_ring_name(), starg->ring_size, socket, RING_F_SC_DEQ);
 490                         plog_info("\t\tCore %u task %u using MP ring %p from core %u task %u\n",
 491                                   lconf->id, starg->id, ring, ct.core, ct.task);
 492                 }
 493         }
 494         else
 495                 ring = rte_ring_create(gen_ring_name(), starg->ring_size, socket, RING_F_SP_ENQ | RING_F_SC_DEQ);
 496
 497         PROX_PANIC(ring == NULL, "Cannot create ring to connect I/O core %u with worker core %u\n", lconf->id, ct.core);
 498
 499         starg->tx_rings[starg->tot_n_txrings_inited] = ring;
 500         starg->tot_n_txrings_inited++;
 501
 502         if (ring_created) {
 503                 PROX_ASSERT(dtarg->nb_rxrings < MAX_RINGS_PER_TASK);
 504                 dtarg->rx_rings[dtarg->nb_rxrings] = ring;
 505                 ++dtarg->nb_rxrings;
 506         }
 507         dtarg->nb_slave_threads = starg->core_task_set[idx].n_elems;
 508         dtarg->lb_friend_core = lconf->id;
 509         dtarg->lb_friend_task = starg->id;
 510         plog_info("\t\tWorker thread %d has core %d, task %d as a lb friend\n", ct.core, lconf->id, starg->id);
 511         plog_info("\t\tCore %u task %u tx_ring[%u] -> core %u task %u rx_ring[%u] %p %s %u WT\n",
 512                   lconf->id, starg->id, ring_idx, ct.core, ct.task, dtarg->nb_rxrings, ring, ring->name,
 513                   dtarg->nb_slave_threads);
 514         ++ris->n_pkt_rings;
 515         return ring;
 516 }
 517
 518 static void init_rings(void)
 519 {
 520         struct lcore_cfg *lconf = NULL;
 521         struct task_args *starg;
 522         struct ring_init_stats ris = {0};
 523
 524         while (core_targ_next(&lconf, &starg, 1) == 0) {
 525                 plog_info("\t*** Initializing rings on core %u, task %u ***\n", lconf->id, starg->id);
 526                 for (uint8_t idx = 0; idx < MAX_PROTOCOLS; ++idx) {
 527                         for (uint8_t ring_idx = 0; ring_idx < starg->core_task_set[idx].n_elems; ++ring_idx) {
 528                                 PROX_ASSERT(ring_idx < MAX_WT_PER_LB);
 529                                 PROX_ASSERT(starg->tot_n_txrings_inited < MAX_RINGS_PER_TASK);
 530
 531                                 struct core_task ct = starg->core_task_set[idx].core_task[ring_idx];
 532                                 init_ring_between_tasks(lconf, starg, ct, ring_idx, idx, &ris);
 533                         }
 534                 }
 535         }
 536
 537         plog_info("\tInitialized %d rings:\n"
 538                   "\t\tNumber of packet rings: %u\n"
 539                   "\t\tNumber of control rings: %u\n"
 540                   "\t\tNumber of optimized rings: %u\n",
 541                   ring_init_stats_total(&ris),
 542                   ris.n_pkt_rings,
 543                   ris.n_ctrl_rings,
 544                   ris.n_opt_rings);
 545
 546         lconf = NULL;
 547         struct prox_port_cfg *port;
 548         while (core_targ_next(&lconf, &starg, 1) == 0) {
 549                 if ((starg->task_init) && (starg->flags & TASK_ARG_L3)) {
 550                         struct core_task ct;
 551                         ct.core = prox_cfg.master;
 552                         ct.task = 0;
 553                         ct.type = CTRL_TYPE_PKT;
 554                         struct rte_ring *rx_ring = init_ring_between_tasks(lconf, starg, ct, 0, 0, &ris);
 555
 556                         ct.core = lconf->id;
 557                         ct.task = starg->id;;
 558                         struct rte_ring *tx_ring = init_ring_between_tasks(lcore_cfg, lcore_cfg[prox_cfg.master].targs, ct, 0, 0, &ris);
 559                 }
 560         }
 561 }
 562
 563 static void shuffle_mempool(struct rte_mempool* mempool, uint32_t nb_mbuf)
 564 {
 565         struct rte_mbuf** pkts = prox_zmalloc(nb_mbuf * sizeof(*pkts), rte_socket_id());
 566         uint64_t got = 0;
 567
 568         while (rte_mempool_get_bulk(mempool, (void**)(pkts + got), 1) == 0)
 569                 ++got;
 570
 571         while (got) {
 572                 int idx;
 573                 do {
 574                         idx = rand() % nb_mbuf - 1;
 575                 } while (pkts[idx] == 0);
 576
 577                 rte_mempool_put_bulk(mempool, (void**)&pkts[idx], 1);
 578                 pkts[idx] = 0;
 579                 --got;
 580         };
 581         prox_free(pkts);
 582 }
 583
 584 static void setup_mempools_unique_per_socket(void)
 585 {
 586         uint32_t flags = 0;
 587         char name[64];
 588         struct lcore_cfg *lconf = NULL;
 589         struct task_args *targ;
 590
 591         struct rte_mempool     *pool[MAX_SOCKETS];
 592         uint32_t mbuf_count[MAX_SOCKETS] = {0};
 593         uint32_t nb_cache_mbuf[MAX_SOCKETS] = {0};
 594         uint32_t mbuf_size[MAX_SOCKETS] = {0};
 595
 596         while (core_targ_next_early(&lconf, &targ, 0) == 0) {
 597                 PROX_PANIC(targ->task_init == NULL, "task_init = NULL, is mode specified for core %d, task %d ?\n", lconf->id, targ->id);
 598                 uint8_t socket = rte_lcore_to_socket_id(lconf->id);
 599                 PROX_ASSERT(socket < MAX_SOCKETS);
 600
 601                 if (targ->mbuf_size_set_explicitely)
 602                         flags = MEMPOOL_F_NO_SPREAD;
 603                 if ((!targ->mbuf_size_set_explicitely) && (targ->task_init->mbuf_size != 0)) {
 604                         targ->mbuf_size = targ->task_init->mbuf_size;
 605                 }
 606                 if (targ->rx_port_queue[0].port != OUT_DISCARD) {
 607                         struct prox_port_cfg* port_cfg = &prox_port_cfg[targ->rx_port_queue[0].port];
 608                         PROX_ASSERT(targ->nb_mbuf != 0);
 609                         mbuf_count[socket] += targ->nb_mbuf;
 610                         if (nb_cache_mbuf[socket] == 0)
 611                                 nb_cache_mbuf[socket] = targ->nb_cache_mbuf;
 612                         else {
 613                                 PROX_PANIC(nb_cache_mbuf[socket] != targ->nb_cache_mbuf,
 614                                            "all mbuf_cache must have the same size if using a unique mempool per socket\n");
 615                         }
 616                         if (mbuf_size[socket] == 0)
 617                                 mbuf_size[socket] = targ->mbuf_size;
 618                         else {
 619                                 PROX_PANIC(mbuf_size[socket] != targ->mbuf_size,
 620                                            "all mbuf_size must have the same size if using a unique mempool per socket\n");
 621                         }
 622                         if ((!targ->mbuf_size_set_explicitely) && (strcmp(port_cfg->short_name, "vmxnet3") == 0)) {
 623                                 if (mbuf_size[socket] < MBUF_SIZE + RTE_PKTMBUF_HEADROOM)
 624                                         mbuf_size[socket] = MBUF_SIZE + RTE_PKTMBUF_HEADROOM;
 625                         }
 626                 }
 627         }
 628         for (int i = 0 ; i < MAX_SOCKETS; i++) {
 629                 if (mbuf_count[i] != 0) {
 630                         sprintf(name, "socket_%u_pool", i);
 631                         pool[i] = rte_mempool_create(name,
 632                                                      mbuf_count[i] - 1, mbuf_size[i],
 633                                                      nb_cache_mbuf[i],
 634                                                      sizeof(struct rte_pktmbuf_pool_private),
 635                                                      rte_pktmbuf_pool_init, NULL,
 636                                                      prox_pktmbuf_init, NULL,
 637                                                      i, flags);
 638                         PROX_PANIC(pool[i] == NULL, "\t\tError: cannot create mempool for socket %u\n", i);
 639                         plog_info("\t\tMempool %p size = %u * %u cache %u, socket %d\n", pool[i],
 640                                   mbuf_count[i], mbuf_size[i], nb_cache_mbuf[i], i);
 641
 642                         if (prox_cfg.flags & DSF_SHUFFLE) {
 643                                 shuffle_mempool(pool[i], mbuf_count[i]);
 644                         }
 645                 }
 646         }
 647
 648         lconf = NULL;
 649         while (core_targ_next_early(&lconf, &targ, 0) == 0) {
 650                 uint8_t socket = rte_lcore_to_socket_id(lconf->id);
 651
 652                 if (targ->rx_port_queue[0].port != OUT_DISCARD) {
 653                         /* use this pool for the interface that the core is receiving from */
 654                         /* If one core receives from multiple ports, all the ports use the same mempool */
 655                         targ->pool = pool[socket];
 656                         /* Set the number of mbuf to the number of the unique mempool, so that the used and free work */
 657                         targ->nb_mbuf = mbuf_count[socket];
 658                         plog_info("\t\tMempool %p size = %u * %u cache %u, socket %d\n", targ->pool,
 659                                   targ->nb_mbuf, mbuf_size[socket], targ->nb_cache_mbuf, socket);
 660                 }
 661         }
 662 }
 663
 664 static void setup_mempool_for_rx_task(struct lcore_cfg *lconf, struct task_args *targ)
 665 {
 666         const uint8_t socket = rte_lcore_to_socket_id(lconf->id);
 667         struct prox_port_cfg *port_cfg = &prox_port_cfg[targ->rx_port_queue[0].port];
 668         const struct rte_memzone *mz;
 669         struct rte_mempool *mp = NULL;
 670         uint32_t flags = 0;
 671         char memzone_name[64];
 672         char name[64];
 673
 674         /* mbuf size can be set
 675          *  - from config file (highest priority, overwriting any other config) - should only be used as workaround
 676          *  - through each 'mode', overwriting the default mbuf_size
 677          *  - defaulted to MBUF_SIZE i.e. 1518 Bytes
 678          * Except is set expliciteky, ensure that size is big enough for vmxnet3 driver
 679          */
 680         if (targ->mbuf_size_set_explicitely) {
 681                 flags = MEMPOOL_F_NO_SPREAD;
 682                 /* targ->mbuf_size already set */
 683         }
 684         else if (targ->task_init->mbuf_size != 0) {
 685                 /* mbuf_size not set through config file but set through mode */
 686                 targ->mbuf_size = targ->task_init->mbuf_size;
 687         }
 688         else if (strcmp(port_cfg->short_name, "vmxnet3") == 0) {
 689                 if (targ->mbuf_size < MBUF_SIZE + RTE_PKTMBUF_HEADROOM)
 690                         targ->mbuf_size = MBUF_SIZE + RTE_PKTMBUF_HEADROOM;
 691         }
 692
 693         /* allocate memory pool for packets */
 694         PROX_ASSERT(targ->nb_mbuf != 0);
 695
 696         if (targ->pool_name[0] == '\0') {
 697                 sprintf(name, "core_%u_port_%u_pool", lconf->id, targ->id);
 698         }
 699
 700         snprintf(memzone_name, sizeof(memzone_name)-1, "MP_%s", targ->pool_name);
 701         mz = rte_memzone_lookup(memzone_name);
 702
 703         if (mz != NULL) {
 704                 mp = (struct rte_mempool*)mz->addr;
 705
 706                 targ->nb_mbuf = mp->size;
 707                 targ->pool = mp;
 708         }
 709
 710 #ifdef RTE_LIBRTE_IVSHMEM_FALSE
 711         if (mz != NULL && mp != NULL && mp->phys_addr != mz->ioremap_addr) {
 712                 /* Init mbufs with ioremap_addr for dma */
 713                 mp->phys_addr = mz->ioremap_addr;
 714                 mp->elt_pa[0] = mp->phys_addr + (mp->elt_va_start - (uintptr_t)mp);
 715
 716                 struct prox_pktmbuf_reinit_args init_args;
 717                 init_args.mp = mp;
 718                 init_args.lconf = lconf;
 719
 720                 uint32_t elt_sz = mp->elt_size + mp->header_size + mp->trailer_size;
 721                 rte_mempool_obj_iter((void*)mp->elt_va_start, mp->size, elt_sz, 1,
 722                                      mp->elt_pa, mp->pg_num, mp->pg_shift, prox_pktmbuf_reinit, &init_args);
 723         }
 724 #endif
 725
 726         /* Use this pool for the interface that the core is
 727            receiving from if one core receives from multiple
 728            ports, all the ports use the same mempool */
 729         if (targ->pool == NULL) {
 730                 plog_info("\t\tCreating mempool with name '%s'\n", name);
 731                 targ->pool = rte_mempool_create(name,
 732                                                 targ->nb_mbuf - 1, targ->mbuf_size,
 733                                                 targ->nb_cache_mbuf,
 734                                                 sizeof(struct rte_pktmbuf_pool_private),
 735                                                 rte_pktmbuf_pool_init, NULL,
 736                                                 prox_pktmbuf_init, lconf,
 737                                                 socket, flags);
 738         }
 739
 740         PROX_PANIC(targ->pool == NULL,
 741                    "\t\tError: cannot create mempool for core %u port %u: %s\n", lconf->id, targ->id, rte_strerror(rte_errno));
 742
 743         plog_info("\t\tMempool %p size = %u * %u cache %u, socket %d\n", targ->pool,
 744                   targ->nb_mbuf, targ->mbuf_size, targ->nb_cache_mbuf, socket);
 745         if (prox_cfg.flags & DSF_SHUFFLE) {
 746                 shuffle_mempool(targ->pool, targ->nb_mbuf);
 747         }
 748 }
 749
 750 static void setup_mempools_multiple_per_socket(void)
 751 {
 752         struct lcore_cfg *lconf = NULL;
 753         struct task_args *targ;
 754
 755         while (core_targ_next_early(&lconf, &targ, 0) == 0) {
 756                 PROX_PANIC(targ->task_init == NULL, "task_init = NULL, is mode specified for core %d, task %d ?\n", lconf->id, targ->id);
 757                 if (targ->rx_port_queue[0].port == OUT_DISCARD)
 758                         continue;
 759                 setup_mempool_for_rx_task(lconf, targ);
 760         }
 761 }
 762
 763 static void setup_mempools(void)
 764 {
 765         if (prox_cfg.flags & UNIQUE_MEMPOOL_PER_SOCKET)
 766                 setup_mempools_unique_per_socket();
 767         else
 768                 setup_mempools_multiple_per_socket();
 769 }
 770
 771 static void set_task_lconf(void)
 772 {
 773         struct lcore_cfg *lconf;
 774         uint32_t lcore_id = -1;
 775
 776         while(prox_core_next(&lcore_id, 1) == 0) {
 777                 lconf = &lcore_cfg[lcore_id];
 778                 for (uint8_t task_id = 0; task_id < lconf->n_tasks_all; ++task_id) {
 779                         lconf->targs[task_id].lconf = lconf;
 780                 }
 781         }
 782 }
 783
 784 static void set_dest_threads(void)
 785 {
 786         struct lcore_cfg *lconf = NULL;
 787         struct task_args *targ;
 788
 789         while (core_targ_next(&lconf, &targ, 0) == 0) {
 790                 for (uint8_t idx = 0; idx < MAX_PROTOCOLS; ++idx) {
 791                         for (uint8_t ring_idx = 0; ring_idx < targ->core_task_set[idx].n_elems; ++ring_idx) {
 792                                 struct core_task ct = targ->core_task_set[idx].core_task[ring_idx];
 793
 794                                 struct task_args *dest_task = core_targ_get(ct.core, ct.task);
 795                                 dest_task->prev_tasks[dest_task->n_prev_tasks++] = targ;
 796                         }
 797                 }
 798         }
 799 }
 800
 801 static void setup_all_task_structs_early_init(void)
 802 {
 803         struct lcore_cfg *lconf = NULL;
 804         struct task_args *targ;
 805
 806         plog_info("\t*** Calling early init on all tasks ***\n");
 807         while (core_targ_next(&lconf, &targ, 0) == 0) {
 808                 if (targ->task_init->early_init) {
 809                         targ->task_init->early_init(targ);
 810                 }
 811         }
 812 }
 813
 814 static void setup_all_task_structs(void)
 815 {
 816         struct lcore_cfg *lconf;
 817         uint32_t lcore_id = -1;
 818         struct task_base *tmaster = NULL;
 819
 820         while(prox_core_next(&lcore_id, 1) == 0) {
 821                 lconf = &lcore_cfg[lcore_id];
 822                 for (uint8_t task_id = 0; task_id < lconf->n_tasks_all; ++task_id) {
 823                         if (task_is_master(&lconf->targs[task_id])) {
 824                                 plog_info("\tInitializing MASTER struct for core %d task %d\n", lcore_id, task_id);
 825                                 lconf->tasks_all[task_id] = init_task_struct(&lconf->targs[task_id]);
 826                                 tmaster = lconf->tasks_all[task_id];
 827                         }
 828                 }
 829         }
 830         PROX_PANIC(tmaster == NULL, "Can't initialize master task\n");
 831         lcore_id = -1;
 832
 833         while(prox_core_next(&lcore_id, 1) == 0) {
 834                 lconf = &lcore_cfg[lcore_id];
 835                 plog_info("\tInitializing struct for core %d with %d task\n", lcore_id, lconf->n_tasks_all);
 836                 for (uint8_t task_id = 0; task_id < lconf->n_tasks_all; ++task_id) {
 837                         if (!task_is_master(&lconf->targs[task_id])) {
 838                                 plog_info("\tInitializing struct for core %d task %d\n", lcore_id, task_id);
 839                                 lconf->targs[task_id].tmaster = tmaster;
 840                                 lconf->tasks_all[task_id] = init_task_struct(&lconf->targs[task_id]);
 841                         }
 842                 }
 843         }
 844 }
 845
 846 static void init_port_activate(void)
 847 {
 848         struct lcore_cfg *lconf = NULL;
 849         struct task_args *targ;
 850         uint8_t port_id = 0;
 851
 852         while (core_targ_next_early(&lconf, &targ, 0) == 0) {
 853                 for (int i = 0; i < targ->nb_rxports; i++) {
 854                         port_id = targ->rx_port_queue[i].port;
 855                         prox_port_cfg[port_id].active = 1;
 856                 }
 857
 858                 for (int i = 0; i < targ->nb_txports; i++) {
 859                         port_id = targ->tx_port_queue[i].port;
 860                         prox_port_cfg[port_id].active = 1;
 861                 }
 862         }
 863 }
 864
 865 /* Initialize cores and allocate mempools */
 866 static void init_lcores(void)
 867 {
 868         struct lcore_cfg *lconf = 0;
 869         uint32_t lcore_id = -1;
 870
 871         while(prox_core_next(&lcore_id, 0) == 0) {
 872                 uint8_t socket = rte_lcore_to_socket_id(lcore_id);
 873                 PROX_PANIC(socket + 1 > MAX_SOCKETS, "Can't configure core %u (on socket %u). MAX_SOCKET is set to %d\n", lcore_id, socket, MAX_SOCKETS);
 874         }
 875
 876         /* need to allocate mempools as the first thing to use the lowest possible address range */
 877         plog_info("=== Initializing mempools ===\n");
 878         setup_mempools();
 879
 880         lcore_cfg_alloc_hp();
 881
 882         set_dest_threads();
 883         set_task_lconf();
 884
 885         plog_info("=== Initializing port addresses ===\n");
 886         init_port_addr();
 887
 888         plog_info("=== Initializing queue numbers on cores ===\n");
 889         configure_if_queues();
 890
 891         plog_info("=== Initializing rings on cores ===\n");
 892         init_rings();
 893
 894         plog_info("=== Checking configuration consistency ===\n");
 895         check_cfg_consistent();
 896
 897         plog_all_rings();
 898
 899         setup_all_task_structs_early_init();
 900         plog_info("=== Initializing tasks ===\n");
 901         setup_all_task_structs();
 902 }
 903
 904 static int setup_prox(int argc, char **argv)
 905 {
 906         if (prox_read_config_file() != 0 ||
 907             prox_setup_rte(argv[0]) != 0) {
 908                 return -1;
 909         }
 910
 911         if (prox_cfg.flags & DSF_CHECK_SYNTAX) {
 912                 plog_info("=== Configuration file syntax has been checked ===\n\n");
 913                 exit(EXIT_SUCCESS);
 914         }
 915
 916         init_port_activate();
 917         plog_info("=== Initializing rte devices ===\n");
 918         if (!(prox_cfg.flags & DSF_USE_DUMMY_DEVICES))
 919                 init_rte_ring_dev();
 920         init_rte_dev(prox_cfg.flags & DSF_USE_DUMMY_DEVICES);
 921         plog_info("=== Calibrating TSC overhead ===\n");
 922         clock_init();
 923         plog_info("\tTSC running at %"PRIu64" Hz\n", rte_get_tsc_hz());
 924
 925         init_lcores();
 926         plog_info("=== Initializing ports ===\n");
 927         init_port_all();
 928
 929         if (prox_cfg.logbuf_size) {
 930                 prox_cfg.logbuf = prox_zmalloc(prox_cfg.logbuf_size, rte_socket_id());
 931                 PROX_PANIC(prox_cfg.logbuf == NULL, "Failed to allocate memory for logbuf with size = %d\n", prox_cfg.logbuf_size);
 932         }
 933
 934         if (prox_cfg.flags & DSF_CHECK_INIT) {
 935                 plog_info("=== Initialization sequence completed ===\n\n");
 936                 exit(EXIT_SUCCESS);
 937         }
 938
 939         /* Current way that works to disable DPDK logging */
 940         FILE *f = fopen("/dev/null", "r");
 941         rte_openlog_stream(f);
 942         plog_info("=== PROX started ===\n");
 943         return 0;
 944 }
 945
 946 static int success = 0;
 947 static void siguser_handler(int signal)
 948 {
 949         if (signal == SIGUSR1)
 950                 success = 1;
 951         else
 952                 success = 0;
 953 }
 954
 955 static void sigabrt_handler(__attribute__((unused)) int signum)
 956 {
 957         /* restore default disposition for SIGABRT and SIGPIPE */
 958         signal(SIGABRT, SIG_DFL);
 959         signal(SIGPIPE, SIG_DFL);
 960
 961         /* ignore further Ctrl-C */
 962         signal(SIGINT, SIG_IGN);
 963
 964         /* more drastic exit on tedious termination signal */
 965         plog_info("Aborting...\n");
 966         if (lcore_cfg != NULL) {
 967                 uint32_t lcore_id;
 968                 pthread_t thread_id, tid0, tid = pthread_self();
 969                 memset(&tid0, 0, sizeof(tid0));
 970
 971                 /* cancel all threads except current one */
 972                 lcore_id = -1;
 973                 while (prox_core_next(&lcore_id, 1) == 0) {
 974                         thread_id = lcore_cfg[lcore_id].thread_id;
 975                         if (pthread_equal(thread_id, tid0))
 976                                 continue;
 977                         if (pthread_equal(thread_id, tid))
 978                                 continue;
 979                         pthread_cancel(thread_id);
 980                 }
 981
 982                 /* wait for cancelled threads to terminate */
 983                 lcore_id = -1;
 984                 while (prox_core_next(&lcore_id, 1) == 0) {
 985                         thread_id = lcore_cfg[lcore_id].thread_id;
 986                         if (pthread_equal(thread_id, tid0))
 987                                 continue;
 988                         if (pthread_equal(thread_id, tid))
 989                                 continue;
 990                         pthread_join(thread_id, NULL);
 991                 }
 992         }
 993
 994         /* close ncurses */
 995         display_end();
 996
 997         /* close ports on termination signal */
 998         close_ports_atexit();
 999
1000         /* terminate now */
1001         abort();
1002 }
1003
1004 static void sigterm_handler(int signum)
1005 {
1006         /* abort on second Ctrl-C */
1007         if (signum == SIGINT)
1008                 signal(SIGINT, sigabrt_handler);
1009
1010         /* gracefully quit on harmless termination signal */
1011         /* ports will subsequently get closed at resulting exit */
1012         quit();
1013 }
1014
1015 int main(int argc, char **argv)
1016 {
1017         /* set en_US locale to print big numbers with ',' */
1018         setlocale(LC_NUMERIC, "en_US.utf-8");
1019
1020         if (prox_parse_args(argc, argv) != 0){
1021                 prox_usage(argv[0]);
1022         }
1023
1024         plog_init(prox_cfg.log_name, prox_cfg.log_name_pid);
1025         plog_info("=== " PROGRAM_NAME " " VERSION_STR " ===\n");
1026         plog_info("\tUsing DPDK %s\n", rte_version() + sizeof(RTE_VER_PREFIX));
1027         read_rdt_info();
1028
1029         if (prox_cfg.flags & DSF_LIST_TASK_MODES) {
1030                 /* list supported task modes and exit */
1031                 tasks_list();
1032                 return EXIT_SUCCESS;
1033         }
1034
1035         /* close ports at normal exit */
1036         atexit(close_ports_atexit);
1037         /* gracefully quit on harmless termination signals */
1038         signal(SIGHUP, sigterm_handler);
1039         signal(SIGINT, sigterm_handler);
1040         signal(SIGQUIT, sigterm_handler);
1041         signal(SIGTERM, sigterm_handler);
1042         signal(SIGUSR1, sigterm_handler);
1043         signal(SIGUSR2, sigterm_handler);
1044         /* more drastic exit on tedious termination signals */
1045         signal(SIGABRT, sigabrt_handler);
1046         signal(SIGPIPE, sigabrt_handler);
1047
1048         if (prox_cfg.flags & DSF_DAEMON) {
1049                 signal(SIGUSR1, siguser_handler);
1050                 signal(SIGUSR2, siguser_handler);
1051                 plog_info("=== Running in Daemon mode ===\n");
1052                 plog_info("\tForking child and waiting for setup completion\n");
1053
1054                 pid_t ppid = getpid();
1055                 pid_t pid = fork();
1056                 if (pid < 0) {
1057                         plog_err("Failed to fork process to run in daemon mode\n");
1058                         return EXIT_FAILURE;
1059                 }
1060
1061                 if (pid == 0) {
1062                         fclose(stdin);
1063                         fclose(stdout);
1064                         fclose(stderr);
1065                         if (setsid() < 0) {
1066                                 kill(ppid, SIGUSR2);
1067                                 return EXIT_FAILURE;
1068                         }
1069                         if (setup_prox(argc, argv) != 0) {
1070                                 kill(ppid, SIGUSR2);
1071                                 return EXIT_FAILURE;
1072                         }
1073                         else {
1074                                 kill(ppid, SIGUSR1);
1075                                 run(prox_cfg.flags);
1076                                 return EXIT_SUCCESS;
1077                         }
1078                 }
1079                 else {
1080                         /* Before exiting the parent, wait until the
1081                            child process has finished setting up */
1082                         pause();
1083                         if (prox_cfg.logbuf) {
1084                                 file_print(prox_cfg.logbuf);
1085                         }
1086                         return success? EXIT_SUCCESS : EXIT_FAILURE;
1087                 }
1088         }
1089
1090         if (setup_prox(argc, argv) != 0)
1091                 return EXIT_FAILURE;
1092         run(prox_cfg.flags);
1093         return EXIT_SUCCESS;
1094 }