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