lib/librte_eal/linux/eal.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2018 Intel Corporation.
   3  * Copyright(c) 2012-2014 6WIND S.A.
   4  */
   5
   6 #include <stdio.h>
   7 #include <stdlib.h>
   8 #include <stdint.h>
   9 #include <string.h>
  10 #include <stdarg.h>
  11 #include <unistd.h>
  12 #include <pthread.h>
  13 #include <syslog.h>
  14 #include <getopt.h>
  15 #include <sys/file.h>
  16 #include <dirent.h>
  17 #include <fcntl.h>
  18 #include <fnmatch.h>
  19 #include <stddef.h>
  20 #include <errno.h>
  21 #include <limits.h>
  22 #include <sys/mman.h>
  23 #include <sys/queue.h>
  24 #include <sys/stat.h>
  25 #if defined(RTE_ARCH_X86)
  26 #include <sys/io.h>
  27 #endif
  28 #include <linux/version.h>
  29
  30 #include <rte_compat.h>
  31 #include <rte_common.h>
  32 #include <rte_debug.h>
  33 #include <rte_memory.h>
  34 #include <rte_launch.h>
  35 #include <rte_eal.h>
  36 #include <rte_errno.h>
  37 #include <rte_per_lcore.h>
  38 #include <rte_lcore.h>
  39 #include <rte_service_component.h>
  40 #include <rte_log.h>
  41 #include <rte_random.h>
  42 #include <rte_cycles.h>
  43 #include <rte_string_fns.h>
  44 #include <rte_cpuflags.h>
  45 #include <rte_interrupts.h>
  46 #include <rte_bus.h>
  47 #include <rte_dev.h>
  48 #include <rte_devargs.h>
  49 #include <rte_version.h>
  50 #include <rte_atomic.h>
  51 #include <malloc_heap.h>
  52 #include <rte_vfio.h>
  53 #include <rte_telemetry.h>
  54
  55 #include "eal_private.h"
  56 #include "eal_thread.h"
  57 #include "eal_internal_cfg.h"
  58 #include "eal_filesystem.h"
  59 #include "eal_hugepages.h"
  60 #include "eal_memcfg.h"
  61 #include "eal_trace.h"
  62 #include "eal_options.h"
  63 #include "eal_vfio.h"
  64 #include "hotplug_mp.h"
  65
  66 #define MEMSIZE_IF_NO_HUGE_PAGE (64ULL * 1024ULL * 1024ULL)
  67
  68 #define SOCKET_MEM_STRLEN (RTE_MAX_NUMA_NODES * 10)
  69
  70 #define KERNEL_IOMMU_GROUPS_PATH "/sys/kernel/iommu_groups"
  71
  72 /* Allow the application to print its usage message too if set */
  73 static rte_usage_hook_t rte_application_usage_hook = NULL;
  74
  75 /* define fd variable here, because file needs to be kept open for the
  76  * duration of the program, as we hold a write lock on it in the primary proc */
  77 static int mem_cfg_fd = -1;
  78
  79 static struct flock wr_lock = {
  80                 .l_type = F_WRLCK,
  81                 .l_whence = SEEK_SET,
  82                 .l_start = offsetof(struct rte_mem_config, memsegs),
  83                 .l_len = RTE_SIZEOF_FIELD(struct rte_mem_config, memsegs),
  84 };
  85
  86 /* internal configuration (per-core) */
  87 struct lcore_config lcore_config[RTE_MAX_LCORE];
  88
  89 /* used by rte_rdtsc() */
  90 int rte_cycles_vmware_tsc_map;
  91
  92 static const char *default_runtime_dir = "/var/run";
  93
  94 int
  95 eal_create_runtime_dir(void)
  96 {
  97         const char *directory = default_runtime_dir;
  98         const char *xdg_runtime_dir = getenv("XDG_RUNTIME_DIR");
  99         const char *fallback = "/tmp";
 100         char run_dir[PATH_MAX];
 101         char tmp[PATH_MAX];
 102         int ret;
 103
 104         if (getuid() != 0) {
 105                 /* try XDG path first, fall back to /tmp */
 106                 if (xdg_runtime_dir != NULL)
 107                         directory = xdg_runtime_dir;
 108                 else
 109                         directory = fallback;
 110         }
 111         /* create DPDK subdirectory under runtime dir */
 112         ret = snprintf(tmp, sizeof(tmp), "%s/dpdk", directory);
 113         if (ret < 0 || ret == sizeof(tmp)) {
 114                 RTE_LOG(ERR, EAL, "Error creating DPDK runtime path name\n");
 115                 return -1;
 116         }
 117
 118         /* create prefix-specific subdirectory under DPDK runtime dir */
 119         ret = snprintf(run_dir, sizeof(run_dir), "%s/%s",
 120                         tmp, eal_get_hugefile_prefix());
 121         if (ret < 0 || ret == sizeof(run_dir)) {
 122                 RTE_LOG(ERR, EAL, "Error creating prefix-specific runtime path name\n");
 123                 return -1;
 124         }
 125
 126         /* create the path if it doesn't exist. no "mkdir -p" here, so do it
 127          * step by step.
 128          */
 129         ret = mkdir(tmp, 0700);
 130         if (ret < 0 && errno != EEXIST) {
 131                 RTE_LOG(ERR, EAL, "Error creating '%s': %s\n",
 132                         tmp, strerror(errno));
 133                 return -1;
 134         }
 135
 136         ret = mkdir(run_dir, 0700);
 137         if (ret < 0 && errno != EEXIST) {
 138                 RTE_LOG(ERR, EAL, "Error creating '%s': %s\n",
 139                         run_dir, strerror(errno));
 140                 return -1;
 141         }
 142
 143         if (eal_set_runtime_dir(run_dir, sizeof(run_dir)))
 144                 return -1;
 145
 146         return 0;
 147 }
 148
 149 int
 150 eal_clean_runtime_dir(void)
 151 {
 152         const char *runtime_dir = rte_eal_get_runtime_dir();
 153         DIR *dir;
 154         struct dirent *dirent;
 155         int dir_fd, fd, lck_result;
 156         static const char * const filters[] = {
 157                 "fbarray_*",
 158                 "mp_socket_*"
 159         };
 160
 161         /* open directory */
 162         dir = opendir(runtime_dir);
 163         if (!dir) {
 164                 RTE_LOG(ERR, EAL, "Unable to open runtime directory %s\n",
 165                                 runtime_dir);
 166                 goto error;
 167         }
 168         dir_fd = dirfd(dir);
 169
 170         /* lock the directory before doing anything, to avoid races */
 171         if (flock(dir_fd, LOCK_EX) < 0) {
 172                 RTE_LOG(ERR, EAL, "Unable to lock runtime directory %s\n",
 173                         runtime_dir);
 174                 goto error;
 175         }
 176
 177         dirent = readdir(dir);
 178         if (!dirent) {
 179                 RTE_LOG(ERR, EAL, "Unable to read runtime directory %s\n",
 180                                 runtime_dir);
 181                 goto error;
 182         }
 183
 184         while (dirent != NULL) {
 185                 unsigned int f_idx;
 186                 bool skip = true;
 187
 188                 /* skip files that don't match the patterns */
 189                 for (f_idx = 0; f_idx < RTE_DIM(filters); f_idx++) {
 190                         const char *filter = filters[f_idx];
 191
 192                         if (fnmatch(filter, dirent->d_name, 0) == 0) {
 193                                 skip = false;
 194                                 break;
 195                         }
 196                 }
 197                 if (skip) {
 198                         dirent = readdir(dir);
 199                         continue;
 200                 }
 201
 202                 /* try and lock the file */
 203                 fd = openat(dir_fd, dirent->d_name, O_RDONLY);
 204
 205                 /* skip to next file */
 206                 if (fd == -1) {
 207                         dirent = readdir(dir);
 208                         continue;
 209                 }
 210
 211                 /* non-blocking lock */
 212                 lck_result = flock(fd, LOCK_EX | LOCK_NB);
 213
 214                 /* if lock succeeds, remove the file */
 215                 if (lck_result != -1)
 216                         unlinkat(dir_fd, dirent->d_name, 0);
 217                 close(fd);
 218                 dirent = readdir(dir);
 219         }
 220
 221         /* closedir closes dir_fd and drops the lock */
 222         closedir(dir);
 223         return 0;
 224
 225 error:
 226         if (dir)
 227                 closedir(dir);
 228
 229         RTE_LOG(ERR, EAL, "Error while clearing runtime dir: %s\n",
 230                 strerror(errno));
 231
 232         return -1;
 233 }
 234
 235 /* parse a sysfs (or other) file containing one integer value */
 236 int
 237 eal_parse_sysfs_value(const char *filename, unsigned long *val)
 238 {
 239         FILE *f;
 240         char buf[BUFSIZ];
 241         char *end = NULL;
 242
 243         if ((f = fopen(filename, "r")) == NULL) {
 244                 RTE_LOG(ERR, EAL, "%s(): cannot open sysfs value %s\n",
 245                         __func__, filename);
 246                 return -1;
 247         }
 248
 249         if (fgets(buf, sizeof(buf), f) == NULL) {
 250                 RTE_LOG(ERR, EAL, "%s(): cannot read sysfs value %s\n",
 251                         __func__, filename);
 252                 fclose(f);
 253                 return -1;
 254         }
 255         *val = strtoul(buf, &end, 0);
 256         if ((buf[0] == '\0') || (end == NULL) || (*end != '\n')) {
 257                 RTE_LOG(ERR, EAL, "%s(): cannot parse sysfs value %s\n",
 258                                 __func__, filename);
 259                 fclose(f);
 260                 return -1;
 261         }
 262         fclose(f);
 263         return 0;
 264 }
 265
 266
 267 /* create memory configuration in shared/mmap memory. Take out
 268  * a write lock on the memsegs, so we can auto-detect primary/secondary.
 269  * This means we never close the file while running (auto-close on exit).
 270  * We also don't lock the whole file, so that in future we can use read-locks
 271  * on other parts, e.g. memzones, to detect if there are running secondary
 272  * processes. */
 273 static int
 274 rte_eal_config_create(void)
 275 {
 276         struct rte_config *config = rte_eal_get_configuration();
 277         size_t page_sz = sysconf(_SC_PAGE_SIZE);
 278         size_t cfg_len = sizeof(*config->mem_config);
 279         size_t cfg_len_aligned = RTE_ALIGN(cfg_len, page_sz);
 280         void *rte_mem_cfg_addr, *mapped_mem_cfg_addr;
 281         int retval;
 282         const struct internal_config *internal_conf =
 283                 eal_get_internal_configuration();
 284
 285         const char *pathname = eal_runtime_config_path();
 286
 287         if (internal_conf->no_shconf)
 288                 return 0;
 289
 290         /* map the config before hugepage address so that we don't waste a page */
 291         if (internal_conf->base_virtaddr != 0)
 292                 rte_mem_cfg_addr = (void *)
 293                         RTE_ALIGN_FLOOR(internal_conf->base_virtaddr -
 294                         sizeof(struct rte_mem_config), page_sz);
 295         else
 296                 rte_mem_cfg_addr = NULL;
 297
 298         if (mem_cfg_fd < 0){
 299                 mem_cfg_fd = open(pathname, O_RDWR | O_CREAT, 0600);
 300                 if (mem_cfg_fd < 0) {
 301                         RTE_LOG(ERR, EAL, "Cannot open '%s' for rte_mem_config\n",
 302                                 pathname);
 303                         return -1;
 304                 }
 305         }
 306
 307         retval = ftruncate(mem_cfg_fd, cfg_len);
 308         if (retval < 0){
 309                 close(mem_cfg_fd);
 310                 mem_cfg_fd = -1;
 311                 RTE_LOG(ERR, EAL, "Cannot resize '%s' for rte_mem_config\n",
 312                         pathname);
 313                 return -1;
 314         }
 315
 316         retval = fcntl(mem_cfg_fd, F_SETLK, &wr_lock);
 317         if (retval < 0){
 318                 close(mem_cfg_fd);
 319                 mem_cfg_fd = -1;
 320                 RTE_LOG(ERR, EAL, "Cannot create lock on '%s'. Is another primary "
 321                         "process running?\n", pathname);
 322                 return -1;
 323         }
 324
 325         /* reserve space for config */
 326         rte_mem_cfg_addr = eal_get_virtual_area(rte_mem_cfg_addr,
 327                         &cfg_len_aligned, page_sz, 0, 0);
 328         if (rte_mem_cfg_addr == NULL) {
 329                 RTE_LOG(ERR, EAL, "Cannot mmap memory for rte_config\n");
 330                 close(mem_cfg_fd);
 331                 mem_cfg_fd = -1;
 332                 return -1;
 333         }
 334
 335         /* remap the actual file into the space we've just reserved */
 336         mapped_mem_cfg_addr = mmap(rte_mem_cfg_addr,
 337                         cfg_len_aligned, PROT_READ | PROT_WRITE,
 338                         MAP_SHARED | MAP_FIXED, mem_cfg_fd, 0);
 339         if (mapped_mem_cfg_addr == MAP_FAILED) {
 340                 munmap(rte_mem_cfg_addr, cfg_len);
 341                 close(mem_cfg_fd);
 342                 mem_cfg_fd = -1;
 343                 RTE_LOG(ERR, EAL, "Cannot remap memory for rte_config\n");
 344                 return -1;
 345         }
 346
 347         memcpy(rte_mem_cfg_addr, config->mem_config, sizeof(struct rte_mem_config));
 348         config->mem_config = rte_mem_cfg_addr;
 349
 350         /* store address of the config in the config itself so that secondary
 351          * processes could later map the config into this exact location
 352          */
 353         config->mem_config->mem_cfg_addr = (uintptr_t) rte_mem_cfg_addr;
 354         config->mem_config->dma_maskbits = 0;
 355
 356         return 0;
 357 }
 358
 359 /* attach to an existing shared memory config */
 360 static int
 361 rte_eal_config_attach(void)
 362 {
 363         struct rte_config *config = rte_eal_get_configuration();
 364         struct rte_mem_config *mem_config;
 365         const struct internal_config *internal_conf =
 366                 eal_get_internal_configuration();
 367
 368         const char *pathname = eal_runtime_config_path();
 369
 370         if (internal_conf->no_shconf)
 371                 return 0;
 372
 373         if (mem_cfg_fd < 0){
 374                 mem_cfg_fd = open(pathname, O_RDWR);
 375                 if (mem_cfg_fd < 0) {
 376                         RTE_LOG(ERR, EAL, "Cannot open '%s' for rte_mem_config\n",
 377                                 pathname);
 378                         return -1;
 379                 }
 380         }
 381
 382         /* map it as read-only first */
 383         mem_config = (struct rte_mem_config *) mmap(NULL, sizeof(*mem_config),
 384                         PROT_READ, MAP_SHARED, mem_cfg_fd, 0);
 385         if (mem_config == MAP_FAILED) {
 386                 close(mem_cfg_fd);
 387                 mem_cfg_fd = -1;
 388                 RTE_LOG(ERR, EAL, "Cannot mmap memory for rte_config! error %i (%s)\n",
 389                         errno, strerror(errno));
 390                 return -1;
 391         }
 392
 393         config->mem_config = mem_config;
 394
 395         return 0;
 396 }
 397
 398 /* reattach the shared config at exact memory location primary process has it */
 399 static int
 400 rte_eal_config_reattach(void)
 401 {
 402         struct rte_config *config = rte_eal_get_configuration();
 403         struct rte_mem_config *mem_config;
 404         void *rte_mem_cfg_addr;
 405         const struct internal_config *internal_conf =
 406                 eal_get_internal_configuration();
 407
 408         if (internal_conf->no_shconf)
 409                 return 0;
 410
 411         /* save the address primary process has mapped shared config to */
 412         rte_mem_cfg_addr =
 413                 (void *) (uintptr_t) config->mem_config->mem_cfg_addr;
 414
 415         /* unmap original config */
 416         munmap(config->mem_config, sizeof(struct rte_mem_config));
 417
 418         /* remap the config at proper address */
 419         mem_config = (struct rte_mem_config *) mmap(rte_mem_cfg_addr,
 420                         sizeof(*mem_config), PROT_READ | PROT_WRITE, MAP_SHARED,
 421                         mem_cfg_fd, 0);
 422
 423         close(mem_cfg_fd);
 424         mem_cfg_fd = -1;
 425
 426         if (mem_config == MAP_FAILED || mem_config != rte_mem_cfg_addr) {
 427                 if (mem_config != MAP_FAILED) {
 428                         /* errno is stale, don't use */
 429                         RTE_LOG(ERR, EAL, "Cannot mmap memory for rte_config at [%p], got [%p]"
 430                                 " - please use '--" OPT_BASE_VIRTADDR
 431                                 "' option\n", rte_mem_cfg_addr, mem_config);
 432                         munmap(mem_config, sizeof(struct rte_mem_config));
 433                         return -1;
 434                 }
 435                 RTE_LOG(ERR, EAL, "Cannot mmap memory for rte_config! error %i (%s)\n",
 436                         errno, strerror(errno));
 437                 return -1;
 438         }
 439
 440         config->mem_config = mem_config;
 441
 442         return 0;
 443 }
 444
 445 /* Detect if we are a primary or a secondary process */
 446 enum rte_proc_type_t
 447 eal_proc_type_detect(void)
 448 {
 449         enum rte_proc_type_t ptype = RTE_PROC_PRIMARY;
 450         const char *pathname = eal_runtime_config_path();
 451         const struct internal_config *internal_conf =
 452                 eal_get_internal_configuration();
 453
 454         /* if there no shared config, there can be no secondary processes */
 455         if (!internal_conf->no_shconf) {
 456                 /* if we can open the file but not get a write-lock we are a
 457                  * secondary process. NOTE: if we get a file handle back, we
 458                  * keep that open and don't close it to prevent a race condition
 459                  * between multiple opens.
 460                  */
 461                 if (((mem_cfg_fd = open(pathname, O_RDWR)) >= 0) &&
 462                                 (fcntl(mem_cfg_fd, F_SETLK, &wr_lock) < 0))
 463                         ptype = RTE_PROC_SECONDARY;
 464         }
 465
 466         RTE_LOG(INFO, EAL, "Auto-detected process type: %s\n",
 467                         ptype == RTE_PROC_PRIMARY ? "PRIMARY" : "SECONDARY");
 468
 469         return ptype;
 470 }
 471
 472 /* Sets up rte_config structure with the pointer to shared memory config.*/
 473 static int
 474 rte_config_init(void)
 475 {
 476         struct rte_config *config = rte_eal_get_configuration();
 477         const struct internal_config *internal_conf =
 478                 eal_get_internal_configuration();
 479
 480         config->process_type = internal_conf->process_type;
 481
 482         switch (config->process_type) {
 483         case RTE_PROC_PRIMARY:
 484                 if (rte_eal_config_create() < 0)
 485                         return -1;
 486                 eal_mcfg_update_from_internal();
 487                 break;
 488         case RTE_PROC_SECONDARY:
 489                 if (rte_eal_config_attach() < 0)
 490                         return -1;
 491                 eal_mcfg_wait_complete();
 492                 if (eal_mcfg_check_version() < 0) {
 493                         RTE_LOG(ERR, EAL, "Primary and secondary process DPDK version mismatch\n");
 494                         return -1;
 495                 }
 496                 if (rte_eal_config_reattach() < 0)
 497                         return -1;
 498                 eal_mcfg_update_internal();
 499                 break;
 500         case RTE_PROC_AUTO:
 501         case RTE_PROC_INVALID:
 502                 RTE_LOG(ERR, EAL, "Invalid process type %d\n",
 503                         config->process_type);
 504                 return -1;
 505         }
 506
 507         return 0;
 508 }
 509
 510 /* Unlocks hugepage directories that were locked by eal_hugepage_info_init */
 511 static void
 512 eal_hugedirs_unlock(void)
 513 {
 514         int i;
 515         struct internal_config *internal_conf =
 516                 eal_get_internal_configuration();
 517
 518         for (i = 0; i < MAX_HUGEPAGE_SIZES; i++)
 519         {
 520                 /* skip uninitialized */
 521                 if (internal_conf->hugepage_info[i].lock_descriptor < 0)
 522                         continue;
 523                 /* unlock hugepage file */
 524                 flock(internal_conf->hugepage_info[i].lock_descriptor, LOCK_UN);
 525                 close(internal_conf->hugepage_info[i].lock_descriptor);
 526                 /* reset the field */
 527                 internal_conf->hugepage_info[i].lock_descriptor = -1;
 528         }
 529 }
 530
 531 /* display usage */
 532 static void
 533 eal_usage(const char *prgname)
 534 {
 535         printf("\nUsage: %s ", prgname);
 536         eal_common_usage();
 537         printf("EAL Linux options:\n"
 538                "  --"OPT_SOCKET_MEM"        Memory to allocate on sockets (comma separated values)\n"
 539                "  --"OPT_SOCKET_LIMIT"      Limit memory allocation on sockets (comma separated values)\n"
 540                "  --"OPT_HUGE_DIR"          Directory where hugetlbfs is mounted\n"
 541                "  --"OPT_FILE_PREFIX"       Prefix for hugepage filenames\n"
 542                "  --"OPT_CREATE_UIO_DEV"    Create /dev/uioX (usually done by hotplug)\n"
 543                "  --"OPT_VFIO_INTR"         Interrupt mode for VFIO (legacy|msi|msix)\n"
 544                "  --"OPT_LEGACY_MEM"        Legacy memory mode (no dynamic allocation, contiguous segments)\n"
 545                "  --"OPT_SINGLE_FILE_SEGMENTS" Put all hugepage memory in single files\n"
 546                "  --"OPT_MATCH_ALLOCATIONS" Free hugepages exactly as allocated\n"
 547                "\n");
 548         /* Allow the application to print its usage message too if hook is set */
 549         if ( rte_application_usage_hook ) {
 550                 printf("===== Application Usage =====\n\n");
 551                 rte_application_usage_hook(prgname);
 552         }
 553 }
 554
 555 /* Set a per-application usage message */
 556 rte_usage_hook_t
 557 rte_set_application_usage_hook( rte_usage_hook_t usage_func )
 558 {
 559         rte_usage_hook_t        old_func;
 560
 561         /* Will be NULL on the first call to denote the last usage routine. */
 562         old_func                                        = rte_application_usage_hook;
 563         rte_application_usage_hook      = usage_func;
 564
 565         return old_func;
 566 }
 567
 568 static int
 569 eal_parse_socket_arg(char *strval, volatile uint64_t *socket_arg)
 570 {
 571         char * arg[RTE_MAX_NUMA_NODES];
 572         char *end;
 573         int arg_num, i, len;
 574         uint64_t total_mem = 0;
 575
 576         len = strnlen(strval, SOCKET_MEM_STRLEN);
 577         if (len == SOCKET_MEM_STRLEN) {
 578                 RTE_LOG(ERR, EAL, "--socket-mem is too long\n");
 579                 return -1;
 580         }
 581
 582         /* all other error cases will be caught later */
 583         if (!isdigit(strval[len-1]))
 584                 return -1;
 585
 586         /* split the optarg into separate socket values */
 587         arg_num = rte_strsplit(strval, len,
 588                         arg, RTE_MAX_NUMA_NODES, ',');
 589
 590         /* if split failed, or 0 arguments */
 591         if (arg_num <= 0)
 592                 return -1;
 593
 594         /* parse each defined socket option */
 595         errno = 0;
 596         for (i = 0; i < arg_num; i++) {
 597                 uint64_t val;
 598                 end = NULL;
 599                 val = strtoull(arg[i], &end, 10);
 600
 601                 /* check for invalid input */
 602                 if ((errno != 0)  ||
 603                                 (arg[i][0] == '\0') || (end == NULL) || (*end != '\0'))
 604                         return -1;
 605                 val <<= 20;
 606                 total_mem += val;
 607                 socket_arg[i] = val;
 608         }
 609
 610         return 0;
 611 }
 612
 613 static int
 614 eal_parse_vfio_intr(const char *mode)
 615 {
 616         struct internal_config *internal_conf =
 617                 eal_get_internal_configuration();
 618         unsigned i;
 619         static struct {
 620                 const char *name;
 621                 enum rte_intr_mode value;
 622         } map[] = {
 623                 { "legacy", RTE_INTR_MODE_LEGACY },
 624                 { "msi", RTE_INTR_MODE_MSI },
 625                 { "msix", RTE_INTR_MODE_MSIX },
 626         };
 627
 628         for (i = 0; i < RTE_DIM(map); i++) {
 629                 if (!strcmp(mode, map[i].name)) {
 630                         internal_conf->vfio_intr_mode = map[i].value;
 631                         return 0;
 632                 }
 633         }
 634         return -1;
 635 }
 636
 637 /* Parse the arguments for --log-level only */
 638 static void
 639 eal_log_level_parse(int argc, char **argv)
 640 {
 641         int opt;
 642         char **argvopt;
 643         int option_index;
 644         const int old_optind = optind;
 645         const int old_optopt = optopt;
 646         char * const old_optarg = optarg;
 647         struct internal_config *internal_conf =
 648                 eal_get_internal_configuration();
 649
 650         argvopt = argv;
 651         optind = 1;
 652
 653         while ((opt = getopt_long(argc, argvopt, eal_short_options,
 654                                   eal_long_options, &option_index)) != EOF) {
 655
 656                 int ret;
 657
 658                 /* getopt is not happy, stop right now */
 659                 if (opt == '?')
 660                         break;
 661
 662                 ret = (opt == OPT_LOG_LEVEL_NUM) ?
 663                         eal_parse_common_option(opt, optarg, internal_conf) : 0;
 664
 665                 /* common parser is not happy */
 666                 if (ret < 0)
 667                         break;
 668         }
 669
 670         /* restore getopt lib */
 671         optind = old_optind;
 672         optopt = old_optopt;
 673         optarg = old_optarg;
 674 }
 675
 676 /* Parse the argument given in the command line of the application */
 677 static int
 678 eal_parse_args(int argc, char **argv)
 679 {
 680         int opt, ret;
 681         char **argvopt;
 682         int option_index;
 683         char *prgname = argv[0];
 684         const int old_optind = optind;
 685         const int old_optopt = optopt;
 686         char * const old_optarg = optarg;
 687         struct internal_config *internal_conf =
 688                 eal_get_internal_configuration();
 689
 690         argvopt = argv;
 691         optind = 1;
 692
 693         while ((opt = getopt_long(argc, argvopt, eal_short_options,
 694                                   eal_long_options, &option_index)) != EOF) {
 695
 696                 /* getopt didn't recognise the option */
 697                 if (opt == '?') {
 698                         eal_usage(prgname);
 699                         ret = -1;
 700                         goto out;
 701                 }
 702
 703                 ret = eal_parse_common_option(opt, optarg, internal_conf);
 704                 /* common parser is not happy */
 705                 if (ret < 0) {
 706                         eal_usage(prgname);
 707                         ret = -1;
 708                         goto out;
 709                 }
 710                 /* common parser handled this option */
 711                 if (ret == 0)
 712                         continue;
 713
 714                 switch (opt) {
 715                 case 'h':
 716                         eal_usage(prgname);
 717                         exit(EXIT_SUCCESS);
 718
 719                 case OPT_HUGE_DIR_NUM:
 720                 {
 721                         char *hdir = strdup(optarg);
 722                         if (hdir == NULL)
 723                                 RTE_LOG(ERR, EAL, "Could not store hugepage directory\n");
 724                         else {
 725                                 /* free old hugepage dir */
 726                                 if (internal_conf->hugepage_dir != NULL)
 727                                         free(internal_conf->hugepage_dir);
 728                                 internal_conf->hugepage_dir = hdir;
 729                         }
 730                         break;
 731                 }
 732                 case OPT_FILE_PREFIX_NUM:
 733                 {
 734                         char *prefix = strdup(optarg);
 735                         if (prefix == NULL)
 736                                 RTE_LOG(ERR, EAL, "Could not store file prefix\n");
 737                         else {
 738                                 /* free old prefix */
 739                                 if (internal_conf->hugefile_prefix != NULL)
 740                                         free(internal_conf->hugefile_prefix);
 741                                 internal_conf->hugefile_prefix = prefix;
 742                         }
 743                         break;
 744                 }
 745                 case OPT_SOCKET_MEM_NUM:
 746                         if (eal_parse_socket_arg(optarg,
 747                                         internal_conf->socket_mem) < 0) {
 748                                 RTE_LOG(ERR, EAL, "invalid parameters for --"
 749                                                 OPT_SOCKET_MEM "\n");
 750                                 eal_usage(prgname);
 751                                 ret = -1;
 752                                 goto out;
 753                         }
 754                         internal_conf->force_sockets = 1;
 755                         break;
 756
 757                 case OPT_SOCKET_LIMIT_NUM:
 758                         if (eal_parse_socket_arg(optarg,
 759                                         internal_conf->socket_limit) < 0) {
 760                                 RTE_LOG(ERR, EAL, "invalid parameters for --"
 761                                                 OPT_SOCKET_LIMIT "\n");
 762                                 eal_usage(prgname);
 763                                 ret = -1;
 764                                 goto out;
 765                         }
 766                         internal_conf->force_socket_limits = 1;
 767                         break;
 768
 769                 case OPT_VFIO_INTR_NUM:
 770                         if (eal_parse_vfio_intr(optarg) < 0) {
 771                                 RTE_LOG(ERR, EAL, "invalid parameters for --"
 772                                                 OPT_VFIO_INTR "\n");
 773                                 eal_usage(prgname);
 774                                 ret = -1;
 775                                 goto out;
 776                         }
 777                         break;
 778
 779                 case OPT_CREATE_UIO_DEV_NUM:
 780                         internal_conf->create_uio_dev = 1;
 781                         break;
 782
 783                 case OPT_MBUF_POOL_OPS_NAME_NUM:
 784                 {
 785                         char *ops_name = strdup(optarg);
 786                         if (ops_name == NULL)
 787                                 RTE_LOG(ERR, EAL, "Could not store mbuf pool ops name\n");
 788                         else {
 789                                 /* free old ops name */
 790                                 if (internal_conf->user_mbuf_pool_ops_name !=
 791                                                 NULL)
 792                                         free(internal_conf->user_mbuf_pool_ops_name);
 793
 794                                 internal_conf->user_mbuf_pool_ops_name =
 795                                                 ops_name;
 796                         }
 797                         break;
 798                 }
 799                 case OPT_MATCH_ALLOCATIONS_NUM:
 800                         internal_conf->match_allocations = 1;
 801                         break;
 802
 803                 default:
 804                         if (opt < OPT_LONG_MIN_NUM && isprint(opt)) {
 805                                 RTE_LOG(ERR, EAL, "Option %c is not supported "
 806                                         "on Linux\n", opt);
 807                         } else if (opt >= OPT_LONG_MIN_NUM &&
 808                                    opt < OPT_LONG_MAX_NUM) {
 809                                 RTE_LOG(ERR, EAL, "Option %s is not supported "
 810                                         "on Linux\n",
 811                                         eal_long_options[option_index].name);
 812                         } else {
 813                                 RTE_LOG(ERR, EAL, "Option %d is not supported "
 814                                         "on Linux\n", opt);
 815                         }
 816                         eal_usage(prgname);
 817                         ret = -1;
 818                         goto out;
 819                 }
 820         }
 821
 822         /* create runtime data directory */
 823         if (internal_conf->no_shconf == 0 &&
 824                         eal_create_runtime_dir() < 0) {
 825                 RTE_LOG(ERR, EAL, "Cannot create runtime directory\n");
 826                 ret = -1;
 827                 goto out;
 828         }
 829
 830         if (eal_adjust_config(internal_conf) != 0) {
 831                 ret = -1;
 832                 goto out;
 833         }
 834
 835         /* sanity checks */
 836         if (eal_check_common_options(internal_conf) != 0) {
 837                 eal_usage(prgname);
 838                 ret = -1;
 839                 goto out;
 840         }
 841
 842         if (optind >= 0)
 843                 argv[optind-1] = prgname;
 844         ret = optind-1;
 845
 846 out:
 847         /* restore getopt lib */
 848         optind = old_optind;
 849         optopt = old_optopt;
 850         optarg = old_optarg;
 851
 852         return ret;
 853 }
 854
 855 static int
 856 check_socket(const struct rte_memseg_list *msl, void *arg)
 857 {
 858         int *socket_id = arg;
 859
 860         if (msl->external)
 861                 return 0;
 862
 863         return *socket_id == msl->socket_id;
 864 }
 865
 866 static void
 867 eal_check_mem_on_local_socket(void)
 868 {
 869         int socket_id;
 870         const struct rte_config *config = rte_eal_get_configuration();
 871
 872         socket_id = rte_lcore_to_socket_id(config->master_lcore);
 873
 874         if (rte_memseg_list_walk(check_socket, &socket_id) == 0)
 875                 RTE_LOG(WARNING, EAL, "WARNING: Master core has no memory on local socket!\n");
 876 }
 877
 878 static int
 879 sync_func(__rte_unused void *arg)
 880 {
 881         return 0;
 882 }
 883
 884 /*
 885  * Request iopl privilege for all RPL, returns 0 on success
 886  * iopl() call is mostly for the i386 architecture. For other architectures,
 887  * return -1 to indicate IO privilege can't be changed in this way.
 888  */
 889 int
 890 rte_eal_iopl_init(void)
 891 {
 892 #if defined(RTE_ARCH_X86)
 893         if (iopl(3) != 0)
 894                 return -1;
 895 #endif
 896         return 0;
 897 }
 898
 899 #ifdef VFIO_PRESENT
 900 static int rte_eal_vfio_setup(void)
 901 {
 902         if (rte_vfio_enable("vfio"))
 903                 return -1;
 904
 905         return 0;
 906 }
 907 #endif
 908
 909 static void rte_eal_init_alert(const char *msg)
 910 {
 911         fprintf(stderr, "EAL: FATAL: %s\n", msg);
 912         RTE_LOG(ERR, EAL, "%s\n", msg);
 913 }
 914
 915 /*
 916  * On Linux 3.6+, even if VFIO is not loaded, whenever IOMMU is enabled in the
 917  * BIOS and in the kernel, /sys/kernel/iommu_groups path will contain kernel
 918  * IOMMU groups. If IOMMU is not enabled, that path would be empty.
 919  * Therefore, checking if the path is empty will tell us if IOMMU is enabled.
 920  */
 921 static bool
 922 is_iommu_enabled(void)
 923 {
 924         DIR *dir = opendir(KERNEL_IOMMU_GROUPS_PATH);
 925         struct dirent *d;
 926         int n = 0;
 927
 928         /* if directory doesn't exist, assume IOMMU is not enabled */
 929         if (dir == NULL)
 930                 return false;
 931
 932         while ((d = readdir(dir)) != NULL) {
 933                 /* skip dot and dot-dot */
 934                 if (++n > 2)
 935                         break;
 936         }
 937         closedir(dir);
 938
 939         return n > 2;
 940 }
 941
 942 /* Launch threads, called at application init(). */
 943 int
 944 rte_eal_init(int argc, char **argv)
 945 {
 946         int i, fctret, ret;
 947         pthread_t thread_id;
 948         static rte_atomic32_t run_once = RTE_ATOMIC32_INIT(0);
 949         const char *p;
 950         static char logid[PATH_MAX];
 951         char cpuset[RTE_CPU_AFFINITY_STR_LEN];
 952         char thread_name[RTE_MAX_THREAD_NAME_LEN];
 953         bool phys_addrs;
 954         const struct rte_config *config = rte_eal_get_configuration();
 955         struct internal_config *internal_conf =
 956                 eal_get_internal_configuration();
 957
 958         /* checks if the machine is adequate */
 959         if (!rte_cpu_is_supported()) {
 960                 rte_eal_init_alert("unsupported cpu type.");
 961                 rte_errno = ENOTSUP;
 962                 return -1;
 963         }
 964
 965         if (!rte_atomic32_test_and_set(&run_once)) {
 966                 rte_eal_init_alert("already called initialization.");
 967                 rte_errno = EALREADY;
 968                 return -1;
 969         }
 970
 971         p = strrchr(argv[0], '/');
 972         strlcpy(logid, p ? p + 1 : argv[0], sizeof(logid));
 973         thread_id = pthread_self();
 974
 975         eal_reset_internal_config(internal_conf);
 976
 977         /* set log level as early as possible */
 978         eal_log_level_parse(argc, argv);
 979
 980         /* clone argv to report out later in telemetry */
 981         eal_save_args(argc, argv);
 982
 983         if (rte_eal_cpu_init() < 0) {
 984                 rte_eal_init_alert("Cannot detect lcores.");
 985                 rte_errno = ENOTSUP;
 986                 return -1;
 987         }
 988
 989         fctret = eal_parse_args(argc, argv);
 990         if (fctret < 0) {
 991                 rte_eal_init_alert("Invalid 'command line' arguments.");
 992                 rte_errno = EINVAL;
 993                 rte_atomic32_clear(&run_once);
 994                 return -1;
 995         }
 996
 997         if (eal_plugins_init() < 0) {
 998                 rte_eal_init_alert("Cannot init plugins");
 999                 rte_errno = EINVAL;
1000                 rte_atomic32_clear(&run_once);
1001                 return -1;
1002         }
1003
1004         if (eal_trace_init() < 0) {
1005                 rte_eal_init_alert("Cannot init trace");
1006                 rte_errno = EFAULT;
1007                 return -1;
1008         }
1009
1010         if (eal_option_device_parse()) {
1011                 rte_errno = ENODEV;
1012                 rte_atomic32_clear(&run_once);
1013                 return -1;
1014         }
1015
1016         if (rte_config_init() < 0) {
1017                 rte_eal_init_alert("Cannot init config");
1018                 return -1;
1019         }
1020
1021         if (rte_eal_intr_init() < 0) {
1022                 rte_eal_init_alert("Cannot init interrupt-handling thread");
1023                 return -1;
1024         }
1025
1026         if (rte_eal_alarm_init() < 0) {
1027                 rte_eal_init_alert("Cannot init alarm");
1028                 /* rte_eal_alarm_init sets rte_errno on failure. */
1029                 return -1;
1030         }
1031
1032         /* Put mp channel init before bus scan so that we can init the vdev
1033          * bus through mp channel in the secondary process before the bus scan.
1034          */
1035         if (rte_mp_channel_init() < 0 && rte_errno != ENOTSUP) {
1036                 rte_eal_init_alert("failed to init mp channel");
1037                 if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
1038                         rte_errno = EFAULT;
1039                         return -1;
1040                 }
1041         }
1042
1043         /* register multi-process action callbacks for hotplug */
1044         if (eal_mp_dev_hotplug_init() < 0) {
1045                 rte_eal_init_alert("failed to register mp callback for hotplug");
1046                 return -1;
1047         }
1048
1049         if (rte_bus_scan()) {
1050                 rte_eal_init_alert("Cannot scan the buses for devices");
1051                 rte_errno = ENODEV;
1052                 rte_atomic32_clear(&run_once);
1053                 return -1;
1054         }
1055
1056         phys_addrs = rte_eal_using_phys_addrs() != 0;
1057
1058         /* if no EAL option "--iova-mode=<pa|va>", use bus IOVA scheme */
1059         if (internal_conf->iova_mode == RTE_IOVA_DC) {
1060                 /* autodetect the IOVA mapping mode */
1061                 enum rte_iova_mode iova_mode = rte_bus_get_iommu_class();
1062
1063                 if (iova_mode == RTE_IOVA_DC) {
1064                         RTE_LOG(DEBUG, EAL, "Buses did not request a specific IOVA mode.\n");
1065
1066                         if (!phys_addrs) {
1067                                 /* if we have no access to physical addresses,
1068                                  * pick IOVA as VA mode.
1069                                  */
1070                                 iova_mode = RTE_IOVA_VA;
1071                                 RTE_LOG(DEBUG, EAL, "Physical addresses are unavailable, selecting IOVA as VA mode.\n");
1072 #if defined(RTE_LIBRTE_KNI) && LINUX_VERSION_CODE >= KERNEL_VERSION(4, 10, 0)
1073                         } else if (rte_eal_check_module("rte_kni") == 1) {
1074                                 iova_mode = RTE_IOVA_PA;
1075                                 RTE_LOG(DEBUG, EAL, "KNI is loaded, selecting IOVA as PA mode for better KNI performance.\n");
1076 #endif
1077                         } else if (is_iommu_enabled()) {
1078                                 /* we have an IOMMU, pick IOVA as VA mode */
1079                                 iova_mode = RTE_IOVA_VA;
1080                                 RTE_LOG(DEBUG, EAL, "IOMMU is available, selecting IOVA as VA mode.\n");
1081                         } else {
1082                                 /* physical addresses available, and no IOMMU
1083                                  * found, so pick IOVA as PA.
1084                                  */
1085                                 iova_mode = RTE_IOVA_PA;
1086                                 RTE_LOG(DEBUG, EAL, "IOMMU is not available, selecting IOVA as PA mode.\n");
1087                         }
1088                 }
1089 #if defined(RTE_LIBRTE_KNI) && LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0)
1090                 /* Workaround for KNI which requires physical address to work
1091                  * in kernels < 4.10
1092                  */
1093                 if (iova_mode == RTE_IOVA_VA &&
1094                                 rte_eal_check_module("rte_kni") == 1) {
1095                         if (phys_addrs) {
1096                                 iova_mode = RTE_IOVA_PA;
1097                                 RTE_LOG(WARNING, EAL, "Forcing IOVA as 'PA' because KNI module is loaded\n");
1098                         } else {
1099                                 RTE_LOG(DEBUG, EAL, "KNI can not work since physical addresses are unavailable\n");
1100                         }
1101                 }
1102 #endif
1103                 rte_eal_get_configuration()->iova_mode = iova_mode;
1104         } else {
1105                 rte_eal_get_configuration()->iova_mode =
1106                         internal_conf->iova_mode;
1107         }
1108
1109         if (rte_eal_iova_mode() == RTE_IOVA_PA && !phys_addrs) {
1110                 rte_eal_init_alert("Cannot use IOVA as 'PA' since physical addresses are not available");
1111                 rte_errno = EINVAL;
1112                 return -1;
1113         }
1114
1115         RTE_LOG(INFO, EAL, "Selected IOVA mode '%s'\n",
1116                 rte_eal_iova_mode() == RTE_IOVA_PA ? "PA" : "VA");
1117
1118         if (internal_conf->no_hugetlbfs == 0) {
1119                 /* rte_config isn't initialized yet */
1120                 ret = internal_conf->process_type == RTE_PROC_PRIMARY ?
1121                                 eal_hugepage_info_init() :
1122                                 eal_hugepage_info_read();
1123                 if (ret < 0) {
1124                         rte_eal_init_alert("Cannot get hugepage information.");
1125                         rte_errno = EACCES;
1126                         rte_atomic32_clear(&run_once);
1127                         return -1;
1128                 }
1129         }
1130
1131         if (internal_conf->memory == 0 && internal_conf->force_sockets == 0) {
1132                 if (internal_conf->no_hugetlbfs)
1133                         internal_conf->memory = MEMSIZE_IF_NO_HUGE_PAGE;
1134         }
1135
1136         if (internal_conf->vmware_tsc_map == 1) {
1137 #ifdef RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT
1138                 rte_cycles_vmware_tsc_map = 1;
1139                 RTE_LOG (DEBUG, EAL, "Using VMWARE TSC MAP, "
1140                                 "you must have monitor_control.pseudo_perfctr = TRUE\n");
1141 #else
1142                 RTE_LOG (WARNING, EAL, "Ignoring --vmware-tsc-map because "
1143                                 "RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT is not set\n");
1144 #endif
1145         }
1146
1147         if (rte_eal_log_init(logid, internal_conf->syslog_facility) < 0) {
1148                 rte_eal_init_alert("Cannot init logging.");
1149                 rte_errno = ENOMEM;
1150                 rte_atomic32_clear(&run_once);
1151                 return -1;
1152         }
1153
1154 #ifdef VFIO_PRESENT
1155         if (rte_eal_vfio_setup() < 0) {
1156                 rte_eal_init_alert("Cannot init VFIO");
1157                 rte_errno = EAGAIN;
1158                 rte_atomic32_clear(&run_once);
1159                 return -1;
1160         }
1161 #endif
1162         /* in secondary processes, memory init may allocate additional fbarrays
1163          * not present in primary processes, so to avoid any potential issues,
1164          * initialize memzones first.
1165          */
1166         if (rte_eal_memzone_init() < 0) {
1167                 rte_eal_init_alert("Cannot init memzone");
1168                 rte_errno = ENODEV;
1169                 return -1;
1170         }
1171
1172         if (rte_eal_memory_init() < 0) {
1173                 rte_eal_init_alert("Cannot init memory");
1174                 rte_errno = ENOMEM;
1175                 return -1;
1176         }
1177
1178         /* the directories are locked during eal_hugepage_info_init */
1179         eal_hugedirs_unlock();
1180
1181         if (rte_eal_malloc_heap_init() < 0) {
1182                 rte_eal_init_alert("Cannot init malloc heap");
1183                 rte_errno = ENODEV;
1184                 return -1;
1185         }
1186
1187         if (rte_eal_tailqs_init() < 0) {
1188                 rte_eal_init_alert("Cannot init tail queues for objects");
1189                 rte_errno = EFAULT;
1190                 return -1;
1191         }
1192
1193         if (rte_eal_timer_init() < 0) {
1194                 rte_eal_init_alert("Cannot init HPET or TSC timers");
1195                 rte_errno = ENOTSUP;
1196                 return -1;
1197         }
1198
1199         eal_check_mem_on_local_socket();
1200
1201         eal_thread_init_master(config->master_lcore);
1202
1203         ret = eal_thread_dump_affinity(cpuset, sizeof(cpuset));
1204
1205         RTE_LOG(DEBUG, EAL, "Master lcore %u is ready (tid=%zx;cpuset=[%s%s])\n",
1206                 config->master_lcore, (uintptr_t)thread_id, cpuset,
1207                 ret == 0 ? "" : "...");
1208
1209         RTE_LCORE_FOREACH_SLAVE(i) {
1210
1211                 /*
1212                  * create communication pipes between master thread
1213                  * and children
1214                  */
1215                 if (pipe(lcore_config[i].pipe_master2slave) < 0)
1216                         rte_panic("Cannot create pipe\n");
1217                 if (pipe(lcore_config[i].pipe_slave2master) < 0)
1218                         rte_panic("Cannot create pipe\n");
1219
1220                 lcore_config[i].state = WAIT;
1221
1222                 /* create a thread for each lcore */
1223                 ret = pthread_create(&lcore_config[i].thread_id, NULL,
1224                                      eal_thread_loop, NULL);
1225                 if (ret != 0)
1226                         rte_panic("Cannot create thread\n");
1227
1228                 /* Set thread_name for aid in debugging. */
1229                 snprintf(thread_name, sizeof(thread_name),
1230                         "lcore-slave-%d", i);
1231                 ret = rte_thread_setname(lcore_config[i].thread_id,
1232                                                 thread_name);
1233                 if (ret != 0)
1234                         RTE_LOG(DEBUG, EAL,
1235                                 "Cannot set name for lcore thread\n");
1236         }
1237
1238         /*
1239          * Launch a dummy function on all slave lcores, so that master lcore
1240          * knows they are all ready when this function returns.
1241          */
1242         rte_eal_mp_remote_launch(sync_func, NULL, SKIP_MASTER);
1243         rte_eal_mp_wait_lcore();
1244
1245         /* initialize services so vdevs register service during bus_probe. */
1246         ret = rte_service_init();
1247         if (ret) {
1248                 rte_eal_init_alert("rte_service_init() failed");
1249                 rte_errno = ENOEXEC;
1250                 return -1;
1251         }
1252
1253         /* Probe all the buses and devices/drivers on them */
1254         if (rte_bus_probe()) {
1255                 rte_eal_init_alert("Cannot probe devices");
1256                 rte_errno = ENOTSUP;
1257                 return -1;
1258         }
1259
1260 #ifdef VFIO_PRESENT
1261         /* Register mp action after probe() so that we got enough info */
1262         if (rte_vfio_is_enabled("vfio") && vfio_mp_sync_setup() < 0)
1263                 return -1;
1264 #endif
1265
1266         /* initialize default service/lcore mappings and start running. Ignore
1267          * -ENOTSUP, as it indicates no service coremask passed to EAL.
1268          */
1269         ret = rte_service_start_with_defaults();
1270         if (ret < 0 && ret != -ENOTSUP) {
1271                 rte_errno = ENOEXEC;
1272                 return -1;
1273         }
1274
1275         /*
1276          * Clean up unused files in runtime directory. We do this at the end of
1277          * init and not at the beginning because we want to clean stuff up
1278          * whether we are primary or secondary process, but we cannot remove
1279          * primary process' files because secondary should be able to run even
1280          * if primary process is dead.
1281          *
1282          * In no_shconf mode, no runtime directory is created in the first
1283          * place, so no cleanup needed.
1284          */
1285         if (!internal_conf->no_shconf && eal_clean_runtime_dir() < 0) {
1286                 rte_eal_init_alert("Cannot clear runtime directory");
1287                 return -1;
1288         }
1289         if (!internal_conf->no_telemetry) {
1290                 const char *error_str = NULL;
1291                 if (rte_telemetry_init(rte_eal_get_runtime_dir(),
1292                                 &internal_conf->ctrl_cpuset, &error_str)
1293                                 != 0) {
1294                         rte_eal_init_alert(error_str);
1295                         return -1;
1296                 }
1297                 if (error_str != NULL)
1298                         RTE_LOG(NOTICE, EAL, "%s\n", error_str);
1299         }
1300
1301         eal_mcfg_complete();
1302
1303         return fctret;
1304 }
1305
1306 static int
1307 mark_freeable(const struct rte_memseg_list *msl, const struct rte_memseg *ms,
1308                 void *arg __rte_unused)
1309 {
1310         /* ms is const, so find this memseg */
1311         struct rte_memseg *found;
1312
1313         if (msl->external)
1314                 return 0;
1315
1316         found = rte_mem_virt2memseg(ms->addr, msl);
1317
1318         found->flags &= ~RTE_MEMSEG_FLAG_DO_NOT_FREE;
1319
1320         return 0;
1321 }
1322
1323 int
1324 rte_eal_cleanup(void)
1325 {
1326         /* if we're in a primary process, we need to mark hugepages as freeable
1327          * so that finalization can release them back to the system.
1328          */
1329         struct internal_config *internal_conf =
1330                 eal_get_internal_configuration();
1331
1332         if (rte_eal_process_type() == RTE_PROC_PRIMARY)
1333                 rte_memseg_walk(mark_freeable, NULL);
1334         rte_service_finalize();
1335         rte_mp_channel_cleanup();
1336         rte_trace_save();
1337         eal_trace_fini();
1338         eal_cleanup_config(internal_conf);
1339         return 0;
1340 }
1341
1342 int rte_eal_create_uio_dev(void)
1343 {
1344         const struct internal_config *internal_conf =
1345                 eal_get_internal_configuration();
1346
1347         return internal_conf->create_uio_dev;
1348 }
1349
1350 enum rte_intr_mode
1351 rte_eal_vfio_intr_mode(void)
1352 {
1353         const struct internal_config *internal_conf =
1354                 eal_get_internal_configuration();
1355
1356         return internal_conf->vfio_intr_mode;
1357 }
1358
1359 int
1360 rte_eal_check_module(const char *module_name)
1361 {
1362         char sysfs_mod_name[PATH_MAX];
1363         struct stat st;
1364         int n;
1365
1366         if (NULL == module_name)
1367                 return -1;
1368
1369         /* Check if there is sysfs mounted */
1370         if (stat("/sys/module", &st) != 0) {
1371                 RTE_LOG(DEBUG, EAL, "sysfs is not mounted! error %i (%s)\n",
1372                         errno, strerror(errno));
1373                 return -1;
1374         }
1375
1376         /* A module might be built-in, therefore try sysfs */
1377         n = snprintf(sysfs_mod_name, PATH_MAX, "/sys/module/%s", module_name);
1378         if (n < 0 || n > PATH_MAX) {
1379                 RTE_LOG(DEBUG, EAL, "Could not format module path\n");
1380                 return -1;
1381         }
1382
1383         if (stat(sysfs_mod_name, &st) != 0) {
1384                 RTE_LOG(DEBUG, EAL, "Module %s not found! error %i (%s)\n",
1385                         sysfs_mod_name, errno, strerror(errno));
1386                 return 0;
1387         }
1388
1389         /* Module has been found */
1390         return 1;
1391 }