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                    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                 }
 256
 257                 /* By default OFFLOAD is enabled, but if the whole
 258                    chain has NOOFFLOADS set all the way until the
 259                    first task that receives from a port, it will be
 260                    disabled for the destination port. */
 261                 if (!chain_flag_state(targ, TASK_FEATURE_TXQ_FLAGS_NOOFFLOADS, 0)) {
 262                         prox_port_cfg[if_port].tx_conf.txq_flags |= ETH_TXQ_FLAGS_NOOFFLOADS;
 263                 }
 264
 265         }
 266 }
 267
 268 static void configure_if_rx_queues(struct task_args *targ, uint8_t socket)
 269 {
 270         struct prox_port_cfg *port;
 271         for (int i = 0; i < targ->nb_rxports; i++) {
 272                 uint8_t if_port = targ->rx_port_queue[i].port;
 273
 274                 if (if_port == OUT_DISCARD) {
 275                         return;
 276                 }
 277
 278                 port = &prox_port_cfg[if_port];
 279                 PROX_PANIC(!port->active, "Port %u not used, aborting...\n", if_port);
 280
 281                 if(port->rx_ring[0] != '\0') {
 282                         port->n_rxq = 0;
 283                 }
 284
 285                 // If the mbuf size (of the rx task) is not big enough, we might receive multiple segments
 286                 // This is usually the case when setting a big mtu size i.e. enabling jumbo frames.
 287                 // If the packets get transmitted, then multi segments will have to be enabled on the TX port
 288                 uint16_t max_frame_size = port->mtu + ETHER_HDR_LEN + ETHER_CRC_LEN + 2 * PROX_VLAN_TAG_SIZE;
 289                 if (max_frame_size + sizeof(struct rte_mbuf) + RTE_PKTMBUF_HEADROOM > targ->mbuf_size) {
 290                         targ->task_init->flag_features |= TASK_FEATURE_TXQ_FLAGS_MULTSEGS;
 291                 }
 292                 targ->rx_port_queue[i].queue = port->n_rxq;
 293                 port->pool[targ->rx_port_queue[i].queue] = targ->pool;
 294                 port->pool_size[targ->rx_port_queue[i].queue] = targ->nb_mbuf - 1;
 295                 port->n_rxq++;
 296
 297                 int dsocket = port->socket;
 298                 if (dsocket != -1 && dsocket != socket) {
 299                         plog_warn("RX core on socket %d while device on socket %d\n", socket, dsocket);
 300                 }
 301         }
 302 }
 303
 304 static void configure_multi_segments(void)
 305 {
 306         struct lcore_cfg *lconf = NULL;
 307         struct task_args *targ;
 308         uint8_t if_port;
 309
 310         while (core_targ_next(&lconf, &targ, 0) == 0) {
 311                 for (uint8_t i = 0; i < targ->nb_txports; ++i) {
 312                         if_port = targ->tx_port_queue[i].port;
 313                         // Multi segment is disabled for most tasks. It is only enabled for tasks requiring big packets.
 314                         // We can only enable "no multi segment" if no such task exists in the chain of tasks.
 315                         if (!chain_flag_state(targ, TASK_FEATURE_TXQ_FLAGS_MULTSEGS, 1)) {
 316                                 prox_port_cfg[if_port].tx_conf.txq_flags |= ETH_TXQ_FLAGS_NOMULTSEGS;
 317                         }
 318                 }
 319         }
 320 }
 321
 322 static void configure_if_queues(void)
 323 {
 324         struct lcore_cfg *lconf = NULL;
 325         struct task_args *targ;
 326         uint8_t socket;
 327
 328         while (core_targ_next(&lconf, &targ, 0) == 0) {
 329                 socket = rte_lcore_to_socket_id(lconf->id);
 330
 331                 configure_if_rx_queues(targ, socket);
 332                 configure_if_tx_queues(targ, socket);
 333         }
 334 }
 335
 336 static const char *gen_ring_name(void)
 337 {
 338         static char retval[] = "XX";
 339         static const char* ring_names =
 340                 "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
 341                 "abcdefghijklmnopqrstuvwxyz"
 342                 "[\\]^_`!\"#$%&'()*+,-./:;<="
 343                 ">?@{|}0123456789";
 344         static int idx2 = 0;
 345
 346         int idx = idx2;
 347
 348         retval[0] = ring_names[idx % strlen(ring_names)];
 349         idx /= strlen(ring_names);
 350         retval[1] = idx ? ring_names[(idx - 1) % strlen(ring_names)] : 0;
 351
 352         idx2++;
 353
 354         return retval;
 355 }
 356
 357 struct ring_init_stats {
 358         uint32_t n_pkt_rings;
 359         uint32_t n_ctrl_rings;
 360         uint32_t n_opt_rings;
 361 };
 362
 363 static uint32_t ring_init_stats_total(const struct ring_init_stats *ris)
 364 {
 365         return ris->n_pkt_rings + ris->n_ctrl_rings + ris->n_opt_rings;
 366 }
 367
 368 static uint32_t count_incoming_tasks(uint32_t lcore_worker, uint32_t dest_task)
 369 {
 370         struct lcore_cfg *lconf = NULL;
 371         struct task_args *targ;
 372         uint32_t ret = 0;
 373         struct core_task ct;
 374
 375         while (core_targ_next(&lconf, &targ, 0) == 0) {
 376                 for (uint8_t idxx = 0; idxx < MAX_PROTOCOLS; ++idxx) {
 377                         for (uint8_t ridx = 0; ridx < targ->core_task_set[idxx].n_elems; ++ridx) {
 378                                 ct = targ->core_task_set[idxx].core_task[ridx];
 379
 380                                 if (dest_task == ct.task && lcore_worker == ct.core)
 381                                         ret++;
 382                         }
 383                 }
 384         }
 385         return ret;
 386 }
 387
 388 static struct rte_ring *get_existing_ring(uint32_t lcore_id, uint32_t task_id)
 389 {
 390         if (!prox_core_active(lcore_id, 0))
 391                 return NULL;
 392
 393         struct lcore_cfg *lconf = &lcore_cfg[lcore_id];
 394
 395         if (task_id >= lconf->n_tasks_all)
 396                 return NULL;
 397
 398         if (lconf->targs[task_id].nb_rxrings == 0)
 399                 return NULL;
 400
 401         return lconf->targs[task_id].rx_rings[0];
 402 }
 403
 404 static struct rte_ring *init_ring_between_tasks(struct lcore_cfg *lconf, struct task_args *starg,
 405                                     const struct core_task ct, uint8_t ring_idx, int idx,
 406                                     struct ring_init_stats *ris)
 407 {
 408         uint8_t socket;
 409         struct rte_ring *ring = NULL;
 410         struct lcore_cfg *lworker;
 411         struct task_args *dtarg;
 412
 413         PROX_ASSERT(prox_core_active(ct.core, 0));
 414         lworker = &lcore_cfg[ct.core];
 415
 416         /* socket used is the one that the sending core resides on */
 417         socket = rte_lcore_to_socket_id(lconf->id);
 418
 419         plog_info("\t\tCreating ring on socket %u with size %u\n"
 420                   "\t\t\tsource core, task and socket = %u, %u, %u\n"
 421                   "\t\t\tdestination core, task and socket = %u, %u, %u\n"
 422                   "\t\t\tdestination worker id = %u\n",
 423                   socket, starg->ring_size,
 424                   lconf->id, starg->id, socket,
 425                   ct.core, ct.task, rte_lcore_to_socket_id(ct.core),
 426                   ring_idx);
 427
 428         if (ct.type) {
 429                 struct rte_ring **dring = NULL;
 430
 431                 if (ct.type == CTRL_TYPE_MSG)
 432                         dring = &lworker->ctrl_rings_m[ct.task];
 433                 else if (ct.type == CTRL_TYPE_PKT) {
 434                         dring = &lworker->ctrl_rings_p[ct.task];
 435                         starg->flags |= TASK_ARG_CTRL_RINGS_P;
 436                 }
 437
 438                 if (*dring == NULL)
 439                         ring = rte_ring_create(gen_ring_name(), starg->ring_size, socket, RING_F_SC_DEQ);
 440                 else
 441                         ring = *dring;
 442                 PROX_PANIC(ring == NULL, "Cannot create ring to connect I/O core %u with worker core %u\n", lconf->id, ct.core);
 443
 444                 starg->tx_rings[starg->tot_n_txrings_inited] = ring;
 445                 starg->tot_n_txrings_inited++;
 446                 *dring = ring;
 447                 if (lconf->id == prox_cfg.master) {
 448                         ctrl_rings[ct.core*MAX_TASKS_PER_CORE + ct.task] = ring;
 449                 } else if (ct.core == prox_cfg.master) {
 450                         starg->ctrl_plane_ring = ring;
 451                 }
 452
 453                 plog_info("\t\tCore %u task %u to -> core %u task %u ctrl_ring %s %p %s\n",
 454                           lconf->id, starg->id, ct.core, ct.task, ct.type == CTRL_TYPE_PKT?
 455                           "pkt" : "msg", ring, ring->name);
 456                 ris->n_ctrl_rings++;
 457                 return ring;
 458         }
 459
 460         dtarg = &lworker->targs[ct.task];
 461         lworker->targs[ct.task].worker_thread_id = ring_idx;
 462         PROX_ASSERT(dtarg->flags & TASK_ARG_RX_RING);
 463         PROX_ASSERT(ct.task < lworker->n_tasks_all);
 464
 465         /* If all the following conditions are met, the ring can be
 466            optimized away. */
 467         if (!task_is_master(starg) && !task_is_master(dtarg) && starg->lconf->id == dtarg->lconf->id &&
 468             starg->nb_txrings == 1 && idx == 0 && dtarg->task &&
 469             dtarg->tot_rxrings == 1 && starg->task == dtarg->task - 1) {
 470                 plog_info("\t\tOptimizing away ring on core %u from task %u to task %u\n",
 471                           dtarg->lconf->id, starg->task, dtarg->task);
 472                 /* No need to set up ws_mbuf. */
 473                 starg->tx_opt_ring = 1;
 474                 /* During init of destination task, the buffer in the
 475                    source task will be initialized. */
 476                 dtarg->tx_opt_ring_task = starg;
 477                 ris->n_opt_rings++;
 478                 ++dtarg->nb_rxrings;
 479                 return NULL;
 480         }
 481
 482         int ring_created = 1;
 483         /* Only create multi-producer rings if configured to do so AND
 484            there is only one task sending to the task */
 485         if ((prox_cfg.flags & DSF_MP_RINGS && count_incoming_tasks(ct.core, ct.task) > 1)
 486                 || (prox_cfg.flags & DSF_ENABLE_BYPASS)) {
 487                 ring = get_existing_ring(ct.core, ct.task);
 488
 489                 if (ring) {
 490                         plog_info("\t\tCore %u task %u creatign MP ring %p to core %u task %u\n",
 491                                   lconf->id, starg->id, ring, ct.core, ct.task);
 492                         ring_created = 0;
 493                 }
 494                 else {
 495                         ring = rte_ring_create(gen_ring_name(), starg->ring_size, socket, RING_F_SC_DEQ);
 496                         plog_info("\t\tCore %u task %u using MP ring %p from core %u task %u\n",
 497                                   lconf->id, starg->id, ring, ct.core, ct.task);
 498                 }
 499         }
 500         else
 501                 ring = rte_ring_create(gen_ring_name(), starg->ring_size, socket, RING_F_SP_ENQ | RING_F_SC_DEQ);
 502
 503         PROX_PANIC(ring == NULL, "Cannot create ring to connect I/O core %u with worker core %u\n", lconf->id, ct.core);
 504
 505         starg->tx_rings[starg->tot_n_txrings_inited] = ring;
 506         starg->tot_n_txrings_inited++;
 507
 508         if (ring_created) {
 509                 PROX_ASSERT(dtarg->nb_rxrings < MAX_RINGS_PER_TASK);
 510                 dtarg->rx_rings[dtarg->nb_rxrings] = ring;
 511                 ++dtarg->nb_rxrings;
 512         }
 513         dtarg->nb_slave_threads = starg->core_task_set[idx].n_elems;
 514         dtarg->lb_friend_core = lconf->id;
 515         dtarg->lb_friend_task = starg->id;
 516         plog_info("\t\tWorker thread %d has core %d, task %d as a lb friend\n", ct.core, lconf->id, starg->id);
 517         plog_info("\t\tCore %u task %u tx_ring[%u] -> core %u task %u rx_ring[%u] %p %s %u WT\n",
 518                   lconf->id, starg->id, ring_idx, ct.core, ct.task, dtarg->nb_rxrings, ring, ring->name,
 519                   dtarg->nb_slave_threads);
 520         ++ris->n_pkt_rings;
 521         return ring;
 522 }
 523
 524 static void init_rings(void)
 525 {
 526         struct lcore_cfg *lconf = NULL;
 527         struct task_args *starg;
 528         struct ring_init_stats ris = {0};
 529
 530         while (core_targ_next(&lconf, &starg, 1) == 0) {
 531                 plog_info("\t*** Initializing rings on core %u, task %u ***\n", lconf->id, starg->id);
 532                 for (uint8_t idx = 0; idx < MAX_PROTOCOLS; ++idx) {
 533                         for (uint8_t ring_idx = 0; ring_idx < starg->core_task_set[idx].n_elems; ++ring_idx) {
 534                                 PROX_ASSERT(ring_idx < MAX_WT_PER_LB);
 535                                 PROX_ASSERT(starg->tot_n_txrings_inited < MAX_RINGS_PER_TASK);
 536
 537                                 struct core_task ct = starg->core_task_set[idx].core_task[ring_idx];
 538                                 init_ring_between_tasks(lconf, starg, ct, ring_idx, idx, &ris);
 539                         }
 540                 }
 541         }
 542
 543         plog_info("\tInitialized %d rings:\n"
 544                   "\t\tNumber of packet rings: %u\n"
 545                   "\t\tNumber of control rings: %u\n"
 546                   "\t\tNumber of optimized rings: %u\n",
 547                   ring_init_stats_total(&ris),
 548                   ris.n_pkt_rings,
 549                   ris.n_ctrl_rings,
 550                   ris.n_opt_rings);
 551
 552         lconf = NULL;
 553         struct prox_port_cfg *port;
 554         while (core_targ_next(&lconf, &starg, 1) == 0) {
 555                 if ((starg->task_init) && (starg->flags & TASK_ARG_L3)) {
 556                         struct core_task ct;
 557                         ct.core = prox_cfg.master;
 558                         ct.task = 0;
 559                         ct.type = CTRL_TYPE_PKT;
 560                         struct rte_ring *rx_ring = init_ring_between_tasks(lconf, starg, ct, 0, 0, &ris);
 561
 562                         ct.core = lconf->id;
 563                         ct.task = starg->id;;
 564                         struct rte_ring *tx_ring = init_ring_between_tasks(lcore_cfg, lcore_cfg[prox_cfg.master].targs, ct, 0, 0, &ris);
 565                 }
 566         }
 567 }
 568
 569 static void shuffle_mempool(struct rte_mempool* mempool, uint32_t nb_mbuf)
 570 {
 571         struct rte_mbuf** pkts = prox_zmalloc(nb_mbuf * sizeof(*pkts), rte_socket_id());
 572         uint64_t got = 0;
 573
 574         while (rte_mempool_get_bulk(mempool, (void**)(pkts + got), 1) == 0)
 575                 ++got;
 576
 577         while (got) {
 578                 int idx;
 579                 do {
 580                         idx = rand() % nb_mbuf - 1;
 581                 } while (pkts[idx] == 0);
 582
 583                 rte_mempool_put_bulk(mempool, (void**)&pkts[idx], 1);
 584                 pkts[idx] = 0;
 585                 --got;
 586         };
 587         prox_free(pkts);
 588 }
 589
 590 static void set_mbuf_size(struct task_args *targ)
 591 {
 592         /* mbuf size can be set
 593          *  - from config file (highest priority, overwriting any other config) - should only be used as workaround
 594          *  - defaulted to MBUF_SIZE.
 595          * Except if set explicitely, ensure that size is big enough for vmxnet3 driver
 596          */
 597         if (targ->mbuf_size)
 598                 return;
 599
 600         targ->mbuf_size = MBUF_SIZE;
 601         struct prox_port_cfg *port;
 602         uint16_t max_frame_size = 0, min_buffer_size = 0;
 603         int i40e = 0;
 604         for (int i = 0; i < targ->nb_rxports; i++) {
 605                 uint8_t if_port = targ->rx_port_queue[i].port;
 606
 607                 if (if_port == OUT_DISCARD) {
 608                         continue;
 609                 }
 610                 port = &prox_port_cfg[if_port];
 611                 if (max_frame_size < port->mtu + ETHER_HDR_LEN + ETHER_CRC_LEN + 2 * PROX_VLAN_TAG_SIZE)
 612                         max_frame_size = port->mtu + ETHER_HDR_LEN + ETHER_CRC_LEN + 2 * PROX_VLAN_TAG_SIZE;
 613                 if (min_buffer_size < port->min_rx_bufsize)
 614                         min_buffer_size = port->min_rx_bufsize;
 615
 616                 // Check whether we receive from i40e. This driver have extra mbuf size requirements
 617                 if (strcmp(port->short_name, "i40e") == 0)
 618                         i40e = 1;
 619         }
 620         if (i40e) {
 621                 // i40e supports a maximum of 5 descriptors chained
 622                 uint16_t required_mbuf_size = RTE_ALIGN(max_frame_size / 5, 128) + sizeof(struct rte_mbuf) + RTE_PKTMBUF_HEADROOM;
 623                 if (required_mbuf_size > targ->mbuf_size) {
 624                         targ->mbuf_size = required_mbuf_size;
 625                         plog_info("\t\tSetting mbuf_size to %u to support frame_size %u\n", targ->mbuf_size, max_frame_size);
 626                 }
 627         }
 628         if (min_buffer_size > targ->mbuf_size) {
 629                 plog_warn("Mbuf size might be too small. This might result in packet segmentation and memory leak\n");
 630         }
 631
 632 }
 633
 634 static void setup_mempools_unique_per_socket(void)
 635 {
 636         uint32_t flags = 0;
 637         char name[64];
 638         struct lcore_cfg *lconf = NULL;
 639         struct task_args *targ;
 640
 641         struct rte_mempool     *pool[MAX_SOCKETS];
 642         uint32_t mbuf_count[MAX_SOCKETS] = {0};
 643         uint32_t nb_cache_mbuf[MAX_SOCKETS] = {0};
 644         uint32_t mbuf_size[MAX_SOCKETS] = {0};
 645
 646         while (core_targ_next_early(&lconf, &targ, 0) == 0) {
 647                 PROX_PANIC(targ->task_init == NULL, "task_init = NULL, is mode specified for core %d, task %d ?\n", lconf->id, targ->id);
 648                 uint8_t socket = rte_lcore_to_socket_id(lconf->id);
 649                 PROX_ASSERT(socket < MAX_SOCKETS);
 650
 651                 set_mbuf_size(targ);
 652                 if (targ->rx_port_queue[0].port != OUT_DISCARD) {
 653                         struct prox_port_cfg* port_cfg = &prox_port_cfg[targ->rx_port_queue[0].port];
 654                         PROX_ASSERT(targ->nb_mbuf != 0);
 655                         mbuf_count[socket] += targ->nb_mbuf;
 656                         if (nb_cache_mbuf[socket] == 0)
 657                                 nb_cache_mbuf[socket] = targ->nb_cache_mbuf;
 658                         else {
 659                                 PROX_PANIC(nb_cache_mbuf[socket] != targ->nb_cache_mbuf,
 660                                            "all mbuf_cache must have the same size if using a unique mempool per socket\n");
 661                         }
 662                         if (mbuf_size[socket] == 0)
 663                                 mbuf_size[socket] = targ->mbuf_size;
 664                         else {
 665                                 PROX_PANIC(mbuf_size[socket] != targ->mbuf_size,
 666                                            "all mbuf_size must have the same size if using a unique mempool per socket\n");
 667                         }
 668                 }
 669         }
 670         for (int i = 0 ; i < MAX_SOCKETS; i++) {
 671                 if (mbuf_count[i] != 0) {
 672                         sprintf(name, "socket_%u_pool", i);
 673                         pool[i] = rte_mempool_create(name,
 674                                                      mbuf_count[i] - 1, mbuf_size[i],
 675                                                      nb_cache_mbuf[i],
 676                                                      sizeof(struct rte_pktmbuf_pool_private),
 677                                                      rte_pktmbuf_pool_init, NULL,
 678                                                      prox_pktmbuf_init, NULL,
 679                                                      i, flags);
 680                         PROX_PANIC(pool[i] == NULL, "\t\tError: cannot create mempool for socket %u\n", i);
 681                         plog_info("\t\tMempool %p size = %u * %u cache %u, socket %d\n", pool[i],
 682                                   mbuf_count[i], mbuf_size[i], nb_cache_mbuf[i], i);
 683
 684                         if (prox_cfg.flags & DSF_SHUFFLE) {
 685                                 shuffle_mempool(pool[i], mbuf_count[i]);
 686                         }
 687                 }
 688         }
 689
 690         lconf = NULL;
 691         while (core_targ_next_early(&lconf, &targ, 0) == 0) {
 692                 uint8_t socket = rte_lcore_to_socket_id(lconf->id);
 693
 694                 if (targ->rx_port_queue[0].port != OUT_DISCARD) {
 695                         /* use this pool for the interface that the core is receiving from */
 696                         /* If one core receives from multiple ports, all the ports use the same mempool */
 697                         targ->pool = pool[socket];
 698                         /* Set the number of mbuf to the number of the unique mempool, so that the used and free work */
 699                         targ->nb_mbuf = mbuf_count[socket];
 700                         plog_info("\t\tMempool %p size = %u * %u cache %u, socket %d\n", targ->pool,
 701                                   targ->nb_mbuf, mbuf_size[socket], targ->nb_cache_mbuf, socket);
 702                 }
 703         }
 704 }
 705
 706 static void setup_mempool_for_rx_task(struct lcore_cfg *lconf, struct task_args *targ)
 707 {
 708         const uint8_t socket = rte_lcore_to_socket_id(lconf->id);
 709         struct prox_port_cfg *port_cfg = &prox_port_cfg[targ->rx_port_queue[0].port];
 710         const struct rte_memzone *mz;
 711         struct rte_mempool *mp = NULL;
 712         uint32_t flags = 0;
 713         char memzone_name[64];
 714         char name[64];
 715
 716         set_mbuf_size(targ);
 717
 718         /* allocate memory pool for packets */
 719         PROX_ASSERT(targ->nb_mbuf != 0);
 720
 721         if (targ->pool_name[0] == '\0') {
 722                 sprintf(name, "core_%u_port_%u_pool", lconf->id, targ->id);
 723         }
 724
 725         snprintf(memzone_name, sizeof(memzone_name)-1, "MP_%s", targ->pool_name);
 726         mz = rte_memzone_lookup(memzone_name);
 727
 728         if (mz != NULL) {
 729                 mp = (struct rte_mempool*)mz->addr;
 730
 731                 targ->nb_mbuf = mp->size;
 732                 targ->pool = mp;
 733         }
 734
 735 #ifdef RTE_LIBRTE_IVSHMEM_FALSE
 736         if (mz != NULL && mp != NULL && mp->phys_addr != mz->ioremap_addr) {
 737                 /* Init mbufs with ioremap_addr for dma */
 738                 mp->phys_addr = mz->ioremap_addr;
 739                 mp->elt_pa[0] = mp->phys_addr + (mp->elt_va_start - (uintptr_t)mp);
 740
 741                 struct prox_pktmbuf_reinit_args init_args;
 742                 init_args.mp = mp;
 743                 init_args.lconf = lconf;
 744
 745                 uint32_t elt_sz = mp->elt_size + mp->header_size + mp->trailer_size;
 746                 rte_mempool_obj_iter((void*)mp->elt_va_start, mp->size, elt_sz, 1,
 747                                      mp->elt_pa, mp->pg_num, mp->pg_shift, prox_pktmbuf_reinit, &init_args);
 748         }
 749 #endif
 750
 751         /* Use this pool for the interface that the core is
 752            receiving from if one core receives from multiple
 753            ports, all the ports use the same mempool */
 754         if (targ->pool == NULL) {
 755                 plog_info("\t\tCreating mempool with name '%s'\n", name);
 756                 targ->pool = rte_mempool_create(name,
 757                                                 targ->nb_mbuf - 1, targ->mbuf_size,
 758                                                 targ->nb_cache_mbuf,
 759                                                 sizeof(struct rte_pktmbuf_pool_private),
 760                                                 rte_pktmbuf_pool_init, NULL,
 761                                                 prox_pktmbuf_init, lconf,
 762                                                 socket, flags);
 763         }
 764
 765         PROX_PANIC(targ->pool == NULL,
 766                    "\t\tError: cannot create mempool for core %u port %u: %s\n", lconf->id, targ->id, rte_strerror(rte_errno));
 767
 768         plog_info("\t\tMempool %p size = %u * %u cache %u, socket %d\n", targ->pool,
 769                   targ->nb_mbuf, targ->mbuf_size, targ->nb_cache_mbuf, socket);
 770         if (prox_cfg.flags & DSF_SHUFFLE) {
 771                 shuffle_mempool(targ->pool, targ->nb_mbuf);
 772         }
 773 }
 774
 775 static void setup_mempools_multiple_per_socket(void)
 776 {
 777         struct lcore_cfg *lconf = NULL;
 778         struct task_args *targ;
 779
 780         while (core_targ_next_early(&lconf, &targ, 0) == 0) {
 781                 PROX_PANIC(targ->task_init == NULL, "task_init = NULL, is mode specified for core %d, task %d ?\n", lconf->id, targ->id);
 782                 if (targ->rx_port_queue[0].port == OUT_DISCARD)
 783                         continue;
 784                 setup_mempool_for_rx_task(lconf, targ);
 785         }
 786 }
 787
 788 static void setup_mempools(void)
 789 {
 790         if (prox_cfg.flags & UNIQUE_MEMPOOL_PER_SOCKET)
 791                 setup_mempools_unique_per_socket();
 792         else
 793                 setup_mempools_multiple_per_socket();
 794 }
 795
 796 static void set_task_lconf(void)
 797 {
 798         struct lcore_cfg *lconf;
 799         uint32_t lcore_id = -1;
 800
 801         while(prox_core_next(&lcore_id, 1) == 0) {
 802                 lconf = &lcore_cfg[lcore_id];
 803                 for (uint8_t task_id = 0; task_id < lconf->n_tasks_all; ++task_id) {
 804                         lconf->targs[task_id].lconf = lconf;
 805                 }
 806         }
 807 }
 808
 809 static void set_dest_threads(void)
 810 {
 811         struct lcore_cfg *lconf = NULL;
 812         struct task_args *targ;
 813
 814         while (core_targ_next(&lconf, &targ, 0) == 0) {
 815                 for (uint8_t idx = 0; idx < MAX_PROTOCOLS; ++idx) {
 816                         for (uint8_t ring_idx = 0; ring_idx < targ->core_task_set[idx].n_elems; ++ring_idx) {
 817                                 struct core_task ct = targ->core_task_set[idx].core_task[ring_idx];
 818
 819                                 struct task_args *dest_task = core_targ_get(ct.core, ct.task);
 820                                 dest_task->prev_tasks[dest_task->n_prev_tasks++] = targ;
 821                         }
 822                 }
 823         }
 824 }
 825
 826 static void setup_all_task_structs_early_init(void)
 827 {
 828         struct lcore_cfg *lconf = NULL;
 829         struct task_args *targ;
 830
 831         plog_info("\t*** Calling early init on all tasks ***\n");
 832         while (core_targ_next(&lconf, &targ, 0) == 0) {
 833                 if (targ->task_init->early_init) {
 834                         targ->task_init->early_init(targ);
 835                 }
 836         }
 837 }
 838
 839 static void setup_all_task_structs(void)
 840 {
 841         struct lcore_cfg *lconf;
 842         uint32_t lcore_id = -1;
 843         struct task_base *tmaster = NULL;
 844
 845         while(prox_core_next(&lcore_id, 1) == 0) {
 846                 lconf = &lcore_cfg[lcore_id];
 847                 for (uint8_t task_id = 0; task_id < lconf->n_tasks_all; ++task_id) {
 848                         if (task_is_master(&lconf->targs[task_id])) {
 849                                 plog_info("\tInitializing MASTER struct for core %d task %d\n", lcore_id, task_id);
 850                                 lconf->tasks_all[task_id] = init_task_struct(&lconf->targs[task_id]);
 851                                 tmaster = lconf->tasks_all[task_id];
 852                         }
 853                 }
 854         }
 855         PROX_PANIC(tmaster == NULL, "Can't initialize master task\n");
 856         lcore_id = -1;
 857
 858         while(prox_core_next(&lcore_id, 1) == 0) {
 859                 lconf = &lcore_cfg[lcore_id];
 860                 plog_info("\tInitializing struct for core %d with %d task\n", lcore_id, lconf->n_tasks_all);
 861                 for (uint8_t task_id = 0; task_id < lconf->n_tasks_all; ++task_id) {
 862                         if (!task_is_master(&lconf->targs[task_id])) {
 863                                 plog_info("\tInitializing struct for core %d task %d\n", lcore_id, task_id);
 864                                 lconf->targs[task_id].tmaster = tmaster;
 865                                 lconf->tasks_all[task_id] = init_task_struct(&lconf->targs[task_id]);
 866                         }
 867                 }
 868         }
 869 }
 870
 871 static void init_port_activate(void)
 872 {
 873         struct lcore_cfg *lconf = NULL;
 874         struct task_args *targ;
 875         uint8_t port_id = 0;
 876
 877         while (core_targ_next_early(&lconf, &targ, 0) == 0) {
 878                 for (int i = 0; i < targ->nb_rxports; i++) {
 879                         port_id = targ->rx_port_queue[i].port;
 880                         prox_port_cfg[port_id].active = 1;
 881                 }
 882
 883                 for (int i = 0; i < targ->nb_txports; i++) {
 884                         port_id = targ->tx_port_queue[i].port;
 885                         prox_port_cfg[port_id].active = 1;
 886                 }
 887         }
 888 }
 889
 890 /* Initialize cores and allocate mempools */
 891 static void init_lcores(void)
 892 {
 893         struct lcore_cfg *lconf = 0;
 894         uint32_t lcore_id = -1;
 895
 896         while(prox_core_next(&lcore_id, 0) == 0) {
 897                 uint8_t socket = rte_lcore_to_socket_id(lcore_id);
 898                 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);
 899         }
 900
 901         /* need to allocate mempools as the first thing to use the lowest possible address range */
 902         plog_info("=== Initializing mempools ===\n");
 903         setup_mempools();
 904
 905         lcore_cfg_alloc_hp();
 906
 907         set_dest_threads();
 908         set_task_lconf();
 909
 910         plog_info("=== Initializing port addresses ===\n");
 911         init_port_addr();
 912
 913         plog_info("=== Initializing queue numbers on cores ===\n");
 914         configure_if_queues();
 915
 916         configure_multi_segments();
 917
 918         plog_info("=== Initializing rings on cores ===\n");
 919         init_rings();
 920
 921         plog_info("=== Checking configuration consistency ===\n");
 922         check_cfg_consistent();
 923
 924         plog_all_rings();
 925
 926         setup_all_task_structs_early_init();
 927         plog_info("=== Initializing tasks ===\n");
 928         setup_all_task_structs();
 929 }
 930
 931 static int setup_prox(int argc, char **argv)
 932 {
 933         if (prox_read_config_file() != 0 ||
 934             prox_setup_rte(argv[0]) != 0) {
 935                 return -1;
 936         }
 937
 938         if (prox_cfg.flags & DSF_CHECK_SYNTAX) {
 939                 plog_info("=== Configuration file syntax has been checked ===\n\n");
 940                 exit(EXIT_SUCCESS);
 941         }
 942
 943         init_port_activate();
 944         plog_info("=== Initializing rte devices ===\n");
 945         if (!(prox_cfg.flags & DSF_USE_DUMMY_DEVICES))
 946                 init_rte_ring_dev();
 947         init_rte_dev(prox_cfg.flags & DSF_USE_DUMMY_DEVICES);
 948         plog_info("=== Calibrating TSC overhead ===\n");
 949         clock_init();
 950         plog_info("\tTSC running at %"PRIu64" Hz\n", rte_get_tsc_hz());
 951
 952         init_lcores();
 953         plog_info("=== Initializing ports ===\n");
 954         init_port_all();
 955
 956         if (prox_cfg.logbuf_size) {
 957                 prox_cfg.logbuf = prox_zmalloc(prox_cfg.logbuf_size, rte_socket_id());
 958                 PROX_PANIC(prox_cfg.logbuf == NULL, "Failed to allocate memory for logbuf with size = %d\n", prox_cfg.logbuf_size);
 959         }
 960
 961         if (prox_cfg.flags & DSF_CHECK_INIT) {
 962                 plog_info("=== Initialization sequence completed ===\n\n");
 963                 exit(EXIT_SUCCESS);
 964         }
 965
 966         /* Current way that works to disable DPDK logging */
 967         FILE *f = fopen("/dev/null", "r");
 968         rte_openlog_stream(f);
 969         plog_info("=== PROX started ===\n");
 970         return 0;
 971 }
 972
 973 static int success = 0;
 974 static void siguser_handler(int signal)
 975 {
 976         if (signal == SIGUSR1)
 977                 success = 1;
 978         else
 979                 success = 0;
 980 }
 981
 982 static void sigabrt_handler(__attribute__((unused)) int signum)
 983 {
 984         /* restore default disposition for SIGABRT and SIGPIPE */
 985         signal(SIGABRT, SIG_DFL);
 986         signal(SIGPIPE, SIG_DFL);
 987
 988         /* ignore further Ctrl-C */
 989         signal(SIGINT, SIG_IGN);
 990
 991         /* more drastic exit on tedious termination signal */
 992         plog_info("Aborting...\n");
 993         if (lcore_cfg != NULL) {
 994                 uint32_t lcore_id;
 995                 pthread_t thread_id, tid0, tid = pthread_self();
 996                 memset(&tid0, 0, sizeof(tid0));
 997
 998                 /* cancel all threads except current one */
 999                 lcore_id = -1;
1000                 while (prox_core_next(&lcore_id, 1) == 0) {
1001                         thread_id = lcore_cfg[lcore_id].thread_id;
1002                         if (pthread_equal(thread_id, tid0))
1003                                 continue;
1004                         if (pthread_equal(thread_id, tid))
1005                                 continue;
1006                         pthread_cancel(thread_id);
1007                 }
1008
1009                 /* wait for cancelled threads to terminate */
1010                 lcore_id = -1;
1011                 while (prox_core_next(&lcore_id, 1) == 0) {
1012                         thread_id = lcore_cfg[lcore_id].thread_id;
1013                         if (pthread_equal(thread_id, tid0))
1014                                 continue;
1015                         if (pthread_equal(thread_id, tid))
1016                                 continue;
1017                         pthread_join(thread_id, NULL);
1018                 }
1019         }
1020
1021         /* close ncurses */
1022         display_end();
1023
1024         /* close ports on termination signal */
1025         close_ports_atexit();
1026
1027         /* terminate now */
1028         abort();
1029 }
1030
1031 static void sigterm_handler(int signum)
1032 {
1033         /* abort on second Ctrl-C */
1034         if (signum == SIGINT)
1035                 signal(SIGINT, sigabrt_handler);
1036
1037         /* gracefully quit on harmless termination signal */
1038         /* ports will subsequently get closed at resulting exit */
1039         quit();
1040 }
1041
1042 int main(int argc, char **argv)
1043 {
1044         /* set en_US locale to print big numbers with ',' */
1045         setlocale(LC_NUMERIC, "en_US.utf-8");
1046
1047         if (prox_parse_args(argc, argv) != 0){
1048                 prox_usage(argv[0]);
1049         }
1050
1051         plog_init(prox_cfg.log_name, prox_cfg.log_name_pid);
1052         plog_info("=== " PROGRAM_NAME " " VERSION_STR " ===\n");
1053         plog_info("\tUsing DPDK %s\n", rte_version() + sizeof(RTE_VER_PREFIX));
1054         read_rdt_info();
1055
1056         if (prox_cfg.flags & DSF_LIST_TASK_MODES) {
1057                 /* list supported task modes and exit */
1058                 tasks_list();
1059                 return EXIT_SUCCESS;
1060         }
1061
1062         /* close ports at normal exit */
1063         atexit(close_ports_atexit);
1064         /* gracefully quit on harmless termination signals */
1065         signal(SIGHUP, sigterm_handler);
1066         signal(SIGINT, sigterm_handler);
1067         signal(SIGQUIT, sigterm_handler);
1068         signal(SIGTERM, sigterm_handler);
1069         signal(SIGUSR1, sigterm_handler);
1070         signal(SIGUSR2, sigterm_handler);
1071         /* more drastic exit on tedious termination signals */
1072         signal(SIGABRT, sigabrt_handler);
1073         signal(SIGPIPE, sigabrt_handler);
1074
1075         if (prox_cfg.flags & DSF_DAEMON) {
1076                 signal(SIGUSR1, siguser_handler);
1077                 signal(SIGUSR2, siguser_handler);
1078                 plog_info("=== Running in Daemon mode ===\n");
1079                 plog_info("\tForking child and waiting for setup completion\n");
1080
1081                 pid_t ppid = getpid();
1082                 pid_t pid = fork();
1083                 if (pid < 0) {
1084                         plog_err("Failed to fork process to run in daemon mode\n");
1085                         return EXIT_FAILURE;
1086                 }
1087
1088                 if (pid == 0) {
1089                         fclose(stdin);
1090                         fclose(stdout);
1091                         fclose(stderr);
1092                         if (setsid() < 0) {
1093                                 kill(ppid, SIGUSR2);
1094                                 return EXIT_FAILURE;
1095                         }
1096                         if (setup_prox(argc, argv) != 0) {
1097                                 kill(ppid, SIGUSR2);
1098                                 return EXIT_FAILURE;
1099                         }
1100                         else {
1101                                 kill(ppid, SIGUSR1);
1102                                 run(prox_cfg.flags);
1103                                 return EXIT_SUCCESS;
1104                         }
1105                 }
1106                 else {
1107                         /* Before exiting the parent, wait until the
1108                            child process has finished setting up */
1109                         pause();
1110                         if (prox_cfg.logbuf) {
1111                                 file_print(prox_cfg.logbuf);
1112                         }
1113                         return success? EXIT_SUCCESS : EXIT_FAILURE;
1114                 }
1115         }
1116
1117         if (setup_prox(argc, argv) != 0)
1118                 return EXIT_FAILURE;
1119         run(prox_cfg.flags);
1120         return EXIT_SUCCESS;
1121 }