4 * Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
5 * Copyright(c) 2012-2014 6WIND S.A.
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22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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32 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
51 #include <sys/queue.h>
53 #if defined(RTE_ARCH_X86)
57 #include <rte_common.h>
58 #include <rte_debug.h>
59 #include <rte_memory.h>
60 #include <rte_memzone.h>
61 #include <rte_launch.h>
63 #include <rte_eal_memconfig.h>
64 #include <rte_errno.h>
65 #include <rte_per_lcore.h>
66 #include <rte_lcore.h>
68 #include <rte_random.h>
69 #include <rte_cycles.h>
70 #include <rte_string_fns.h>
71 #include <rte_cpuflags.h>
72 #include <rte_interrupts.h>
76 #include <rte_devargs.h>
77 #include <rte_common.h>
78 #include <rte_version.h>
79 #include <rte_atomic.h>
80 #include <malloc_heap.h>
82 #include "eal_private.h"
83 #include "eal_thread.h"
84 #include "eal_internal_cfg.h"
85 #include "eal_filesystem.h"
86 #include "eal_hugepages.h"
87 #include "eal_options.h"
90 #define MEMSIZE_IF_NO_HUGE_PAGE (64ULL * 1024ULL * 1024ULL)
92 #define SOCKET_MEM_STRLEN (RTE_MAX_NUMA_NODES * 10)
94 /* Allow the application to print its usage message too if set */
95 static rte_usage_hook_t rte_application_usage_hook = NULL;
97 /* early configuration structure, when memory config is not mmapped */
98 static struct rte_mem_config early_mem_config;
100 /* define fd variable here, because file needs to be kept open for the
101 * duration of the program, as we hold a write lock on it in the primary proc */
102 static int mem_cfg_fd = -1;
104 static struct flock wr_lock = {
106 .l_whence = SEEK_SET,
107 .l_start = offsetof(struct rte_mem_config, memseg),
108 .l_len = sizeof(early_mem_config.memseg),
111 /* Address of global and public configuration */
112 static struct rte_config rte_config = {
113 .mem_config = &early_mem_config,
116 /* internal configuration (per-core) */
117 struct lcore_config lcore_config[RTE_MAX_LCORE];
119 /* internal configuration */
120 struct internal_config internal_config;
122 /* used by rte_rdtsc() */
123 int rte_cycles_vmware_tsc_map;
125 /* Return a pointer to the configuration structure */
127 rte_eal_get_configuration(void)
132 /* parse a sysfs (or other) file containing one integer value */
134 eal_parse_sysfs_value(const char *filename, unsigned long *val)
140 if ((f = fopen(filename, "r")) == NULL) {
141 RTE_LOG(ERR, EAL, "%s(): cannot open sysfs value %s\n",
146 if (fgets(buf, sizeof(buf), f) == NULL) {
147 RTE_LOG(ERR, EAL, "%s(): cannot read sysfs value %s\n",
152 *val = strtoul(buf, &end, 0);
153 if ((buf[0] == '\0') || (end == NULL) || (*end != '\n')) {
154 RTE_LOG(ERR, EAL, "%s(): cannot parse sysfs value %s\n",
164 /* create memory configuration in shared/mmap memory. Take out
165 * a write lock on the memsegs, so we can auto-detect primary/secondary.
166 * This means we never close the file while running (auto-close on exit).
167 * We also don't lock the whole file, so that in future we can use read-locks
168 * on other parts, e.g. memzones, to detect if there are running secondary
171 rte_eal_config_create(void)
173 void *rte_mem_cfg_addr;
176 const char *pathname = eal_runtime_config_path();
178 if (internal_config.no_shconf)
181 /* map the config before hugepage address so that we don't waste a page */
182 if (internal_config.base_virtaddr != 0)
183 rte_mem_cfg_addr = (void *)
184 RTE_ALIGN_FLOOR(internal_config.base_virtaddr -
185 sizeof(struct rte_mem_config), sysconf(_SC_PAGE_SIZE));
187 rte_mem_cfg_addr = NULL;
190 mem_cfg_fd = open(pathname, O_RDWR | O_CREAT, 0660);
192 rte_panic("Cannot open '%s' for rte_mem_config\n", pathname);
195 retval = ftruncate(mem_cfg_fd, sizeof(*rte_config.mem_config));
198 rte_panic("Cannot resize '%s' for rte_mem_config\n", pathname);
201 retval = fcntl(mem_cfg_fd, F_SETLK, &wr_lock);
204 rte_exit(EXIT_FAILURE, "Cannot create lock on '%s'. Is another primary "
205 "process running?\n", pathname);
208 rte_mem_cfg_addr = mmap(rte_mem_cfg_addr, sizeof(*rte_config.mem_config),
209 PROT_READ | PROT_WRITE, MAP_SHARED, mem_cfg_fd, 0);
211 if (rte_mem_cfg_addr == MAP_FAILED){
212 rte_panic("Cannot mmap memory for rte_config\n");
214 memcpy(rte_mem_cfg_addr, &early_mem_config, sizeof(early_mem_config));
215 rte_config.mem_config = (struct rte_mem_config *) rte_mem_cfg_addr;
217 /* store address of the config in the config itself so that secondary
218 * processes could later map the config into this exact location */
219 rte_config.mem_config->mem_cfg_addr = (uintptr_t) rte_mem_cfg_addr;
223 /* attach to an existing shared memory config */
225 rte_eal_config_attach(void)
227 struct rte_mem_config *mem_config;
229 const char *pathname = eal_runtime_config_path();
231 if (internal_config.no_shconf)
235 mem_cfg_fd = open(pathname, O_RDWR);
237 rte_panic("Cannot open '%s' for rte_mem_config\n", pathname);
240 /* map it as read-only first */
241 mem_config = (struct rte_mem_config *) mmap(NULL, sizeof(*mem_config),
242 PROT_READ, MAP_SHARED, mem_cfg_fd, 0);
243 if (mem_config == MAP_FAILED)
244 rte_panic("Cannot mmap memory for rte_config! error %i (%s)\n",
245 errno, strerror(errno));
247 rte_config.mem_config = mem_config;
250 /* reattach the shared config at exact memory location primary process has it */
252 rte_eal_config_reattach(void)
254 struct rte_mem_config *mem_config;
255 void *rte_mem_cfg_addr;
257 if (internal_config.no_shconf)
260 /* save the address primary process has mapped shared config to */
261 rte_mem_cfg_addr = (void *) (uintptr_t) rte_config.mem_config->mem_cfg_addr;
263 /* unmap original config */
264 munmap(rte_config.mem_config, sizeof(struct rte_mem_config));
266 /* remap the config at proper address */
267 mem_config = (struct rte_mem_config *) mmap(rte_mem_cfg_addr,
268 sizeof(*mem_config), PROT_READ | PROT_WRITE, MAP_SHARED,
270 if (mem_config == MAP_FAILED || mem_config != rte_mem_cfg_addr) {
271 if (mem_config != MAP_FAILED)
272 /* errno is stale, don't use */
273 rte_panic("Cannot mmap memory for rte_config at [%p], got [%p]"
274 " - please use '--base-virtaddr' option\n",
275 rte_mem_cfg_addr, mem_config);
277 rte_panic("Cannot mmap memory for rte_config! error %i (%s)\n",
278 errno, strerror(errno));
282 rte_config.mem_config = mem_config;
285 /* Detect if we are a primary or a secondary process */
287 eal_proc_type_detect(void)
289 enum rte_proc_type_t ptype = RTE_PROC_PRIMARY;
290 const char *pathname = eal_runtime_config_path();
292 /* if we can open the file but not get a write-lock we are a secondary
293 * process. NOTE: if we get a file handle back, we keep that open
294 * and don't close it to prevent a race condition between multiple opens */
295 if (((mem_cfg_fd = open(pathname, O_RDWR)) >= 0) &&
296 (fcntl(mem_cfg_fd, F_SETLK, &wr_lock) < 0))
297 ptype = RTE_PROC_SECONDARY;
299 RTE_LOG(INFO, EAL, "Auto-detected process type: %s\n",
300 ptype == RTE_PROC_PRIMARY ? "PRIMARY" : "SECONDARY");
305 /* Sets up rte_config structure with the pointer to shared memory config.*/
307 rte_config_init(void)
309 rte_config.process_type = internal_config.process_type;
311 switch (rte_config.process_type){
312 case RTE_PROC_PRIMARY:
313 rte_eal_config_create();
315 case RTE_PROC_SECONDARY:
316 rte_eal_config_attach();
317 rte_eal_mcfg_wait_complete(rte_config.mem_config);
318 rte_eal_config_reattach();
321 case RTE_PROC_INVALID:
322 rte_panic("Invalid process type\n");
326 /* Unlocks hugepage directories that were locked by eal_hugepage_info_init */
328 eal_hugedirs_unlock(void)
332 for (i = 0; i < MAX_HUGEPAGE_SIZES; i++)
334 /* skip uninitialized */
335 if (internal_config.hugepage_info[i].lock_descriptor < 0)
337 /* unlock hugepage file */
338 flock(internal_config.hugepage_info[i].lock_descriptor, LOCK_UN);
339 close(internal_config.hugepage_info[i].lock_descriptor);
340 /* reset the field */
341 internal_config.hugepage_info[i].lock_descriptor = -1;
347 eal_usage(const char *prgname)
349 printf("\nUsage: %s ", prgname);
351 printf("EAL Linux options:\n"
352 " --"OPT_SOCKET_MEM" Memory to allocate on sockets (comma separated values)\n"
353 " --"OPT_HUGE_DIR" Directory where hugetlbfs is mounted\n"
354 " --"OPT_FILE_PREFIX" Prefix for hugepage filenames\n"
355 " --"OPT_BASE_VIRTADDR" Base virtual address\n"
356 " --"OPT_CREATE_UIO_DEV" Create /dev/uioX (usually done by hotplug)\n"
357 " --"OPT_VFIO_INTR" Interrupt mode for VFIO (legacy|msi|msix)\n"
358 " --"OPT_XEN_DOM0" Support running on Xen dom0 without hugetlbfs\n"
360 /* Allow the application to print its usage message too if hook is set */
361 if ( rte_application_usage_hook ) {
362 printf("===== Application Usage =====\n\n");
363 rte_application_usage_hook(prgname);
367 /* Set a per-application usage message */
369 rte_set_application_usage_hook( rte_usage_hook_t usage_func )
371 rte_usage_hook_t old_func;
373 /* Will be NULL on the first call to denote the last usage routine. */
374 old_func = rte_application_usage_hook;
375 rte_application_usage_hook = usage_func;
381 eal_parse_socket_mem(char *socket_mem)
383 char * arg[RTE_MAX_NUMA_NODES];
386 uint64_t total_mem = 0;
388 len = strnlen(socket_mem, SOCKET_MEM_STRLEN);
389 if (len == SOCKET_MEM_STRLEN) {
390 RTE_LOG(ERR, EAL, "--socket-mem is too long\n");
394 /* all other error cases will be caught later */
395 if (!isdigit(socket_mem[len-1]))
398 /* split the optarg into separate socket values */
399 arg_num = rte_strsplit(socket_mem, len,
400 arg, RTE_MAX_NUMA_NODES, ',');
402 /* if split failed, or 0 arguments */
406 internal_config.force_sockets = 1;
408 /* parse each defined socket option */
410 for (i = 0; i < arg_num; i++) {
412 internal_config.socket_mem[i] = strtoull(arg[i], &end, 10);
414 /* check for invalid input */
416 (arg[i][0] == '\0') || (end == NULL) || (*end != '\0'))
418 internal_config.socket_mem[i] *= 1024ULL;
419 internal_config.socket_mem[i] *= 1024ULL;
420 total_mem += internal_config.socket_mem[i];
423 /* check if we have a positive amount of total memory */
431 eal_parse_base_virtaddr(const char *arg)
437 addr = strtoull(arg, &end, 16);
439 /* check for errors */
440 if ((errno != 0) || (arg[0] == '\0') || end == NULL || (*end != '\0'))
443 /* make sure we don't exceed 32-bit boundary on 32-bit target */
445 if (addr >= UINTPTR_MAX)
449 /* align the addr on 16M boundary, 16MB is the minimum huge page
450 * size on IBM Power architecture. If the addr is aligned to 16MB,
451 * it can align to 2MB for x86. So this alignment can also be used
453 internal_config.base_virtaddr =
454 RTE_PTR_ALIGN_CEIL((uintptr_t)addr, (size_t)RTE_PGSIZE_16M);
460 eal_parse_vfio_intr(const char *mode)
465 enum rte_intr_mode value;
467 { "legacy", RTE_INTR_MODE_LEGACY },
468 { "msi", RTE_INTR_MODE_MSI },
469 { "msix", RTE_INTR_MODE_MSIX },
472 for (i = 0; i < RTE_DIM(map); i++) {
473 if (!strcmp(mode, map[i].name)) {
474 internal_config.vfio_intr_mode = map[i].value;
481 /* Parse the arguments for --log-level only */
483 eal_log_level_parse(int argc, char **argv)
488 const int old_optind = optind;
489 const int old_optopt = optopt;
490 char * const old_optarg = optarg;
495 eal_reset_internal_config(&internal_config);
497 while ((opt = getopt_long(argc, argvopt, eal_short_options,
498 eal_long_options, &option_index)) != EOF) {
502 /* getopt is not happy, stop right now */
506 ret = (opt == OPT_LOG_LEVEL_NUM) ?
507 eal_parse_common_option(opt, optarg, &internal_config) : 0;
509 /* common parser is not happy */
514 /* restore getopt lib */
520 /* Parse the argument given in the command line of the application */
522 eal_parse_args(int argc, char **argv)
527 char *prgname = argv[0];
528 const int old_optind = optind;
529 const int old_optopt = optopt;
530 char * const old_optarg = optarg;
535 while ((opt = getopt_long(argc, argvopt, eal_short_options,
536 eal_long_options, &option_index)) != EOF) {
538 /* getopt is not happy, stop right now */
545 ret = eal_parse_common_option(opt, optarg, &internal_config);
546 /* common parser is not happy */
552 /* common parser handled this option */
562 case OPT_XEN_DOM0_NUM:
563 #ifdef RTE_LIBRTE_XEN_DOM0
564 internal_config.xen_dom0_support = 1;
566 RTE_LOG(ERR, EAL, "Can't support DPDK app "
567 "running on Dom0, please configure"
568 " RTE_LIBRTE_XEN_DOM0=y\n");
574 case OPT_HUGE_DIR_NUM:
575 internal_config.hugepage_dir = optarg;
578 case OPT_FILE_PREFIX_NUM:
579 internal_config.hugefile_prefix = optarg;
582 case OPT_SOCKET_MEM_NUM:
583 if (eal_parse_socket_mem(optarg) < 0) {
584 RTE_LOG(ERR, EAL, "invalid parameters for --"
585 OPT_SOCKET_MEM "\n");
592 case OPT_BASE_VIRTADDR_NUM:
593 if (eal_parse_base_virtaddr(optarg) < 0) {
594 RTE_LOG(ERR, EAL, "invalid parameter for --"
595 OPT_BASE_VIRTADDR "\n");
602 case OPT_VFIO_INTR_NUM:
603 if (eal_parse_vfio_intr(optarg) < 0) {
604 RTE_LOG(ERR, EAL, "invalid parameters for --"
612 case OPT_CREATE_UIO_DEV_NUM:
613 internal_config.create_uio_dev = 1;
617 if (opt < OPT_LONG_MIN_NUM && isprint(opt)) {
618 RTE_LOG(ERR, EAL, "Option %c is not supported "
620 } else if (opt >= OPT_LONG_MIN_NUM &&
621 opt < OPT_LONG_MAX_NUM) {
622 RTE_LOG(ERR, EAL, "Option %s is not supported "
624 eal_long_options[option_index].name);
626 RTE_LOG(ERR, EAL, "Option %d is not supported "
635 if (eal_adjust_config(&internal_config) != 0) {
641 if (eal_check_common_options(&internal_config) != 0) {
647 /* --xen-dom0 doesn't make sense with --socket-mem */
648 if (internal_config.xen_dom0_support && internal_config.force_sockets == 1) {
649 RTE_LOG(ERR, EAL, "Options --"OPT_SOCKET_MEM" cannot be specified "
650 "together with --"OPT_XEN_DOM0"\n");
657 argv[optind-1] = prgname;
661 /* restore getopt lib */
670 eal_check_mem_on_local_socket(void)
672 const struct rte_memseg *ms;
675 socket_id = rte_lcore_to_socket_id(rte_config.master_lcore);
677 ms = rte_eal_get_physmem_layout();
679 for (i = 0; i < RTE_MAX_MEMSEG; i++)
680 if (ms[i].socket_id == socket_id &&
684 RTE_LOG(WARNING, EAL, "WARNING: Master core has no "
685 "memory on local socket!\n");
689 sync_func(__attribute__((unused)) void *arg)
695 rte_eal_mcfg_complete(void)
697 /* ALL shared mem_config related INIT DONE */
698 if (rte_config.process_type == RTE_PROC_PRIMARY)
699 rte_config.mem_config->magic = RTE_MAGIC;
703 * Request iopl privilege for all RPL, returns 0 on success
704 * iopl() call is mostly for the i386 architecture. For other architectures,
705 * return -1 to indicate IO privilege can't be changed in this way.
708 rte_eal_iopl_init(void)
710 #if defined(RTE_ARCH_X86)
718 static int rte_eal_vfio_setup(void)
720 int vfio_enabled = 0;
722 if (!internal_config.no_pci) {
724 vfio_enabled |= pci_vfio_is_enabled();
729 /* if we are primary process, create a thread to communicate with
730 * secondary processes. the thread will use a socket to wait for
731 * requests from secondary process to send open file descriptors,
732 * because VFIO does not allow multiple open descriptors on a group or
735 if (internal_config.process_type == RTE_PROC_PRIMARY &&
736 vfio_mp_sync_setup() < 0)
744 static void rte_eal_init_alert(const char *msg)
746 fprintf(stderr, "EAL: FATAL: %s\n", msg);
747 RTE_LOG(ERR, EAL, "%s\n", msg);
750 /* Launch threads, called at application init(). */
752 rte_eal_init(int argc, char **argv)
756 static rte_atomic32_t run_once = RTE_ATOMIC32_INIT(0);
758 char cpuset[RTE_CPU_AFFINITY_STR_LEN];
759 char thread_name[RTE_MAX_THREAD_NAME_LEN];
761 /* checks if the machine is adequate */
762 if (!rte_cpu_is_supported()) {
763 rte_eal_init_alert("unsupported cpu type.");
768 if (!rte_atomic32_test_and_set(&run_once)) {
769 rte_eal_init_alert("already called initialization.");
770 rte_errno = EALREADY;
774 logid = strrchr(argv[0], '/');
775 logid = strdup(logid ? logid + 1: argv[0]);
777 thread_id = pthread_self();
779 eal_log_level_parse(argc, argv);
781 /* set log level as early as possible */
782 rte_set_log_level(internal_config.log_level);
784 if (rte_eal_cpu_init() < 0) {
785 rte_eal_init_alert("Cannot detect lcores.");
790 fctret = eal_parse_args(argc, argv);
792 rte_eal_init_alert("Invalid 'command line' arguments.");
794 rte_atomic32_clear(&run_once);
798 if (internal_config.no_hugetlbfs == 0 &&
799 internal_config.process_type != RTE_PROC_SECONDARY &&
800 internal_config.xen_dom0_support == 0 &&
801 eal_hugepage_info_init() < 0) {
802 rte_eal_init_alert("Cannot get hugepage information.");
804 rte_atomic32_clear(&run_once);
808 if (internal_config.memory == 0 && internal_config.force_sockets == 0) {
809 if (internal_config.no_hugetlbfs)
810 internal_config.memory = MEMSIZE_IF_NO_HUGE_PAGE;
813 if (internal_config.vmware_tsc_map == 1) {
814 #ifdef RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT
815 rte_cycles_vmware_tsc_map = 1;
816 RTE_LOG (DEBUG, EAL, "Using VMWARE TSC MAP, "
817 "you must have monitor_control.pseudo_perfctr = TRUE\n");
819 RTE_LOG (WARNING, EAL, "Ignoring --vmware-tsc-map because "
820 "RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT is not set\n");
824 rte_srand(rte_rdtsc());
828 if (rte_eal_log_init(logid, internal_config.syslog_facility) < 0) {
829 rte_eal_init_alert("Cannot init logging.");
831 rte_atomic32_clear(&run_once);
835 if (rte_eal_pci_init() < 0) {
836 rte_eal_init_alert("Cannot init PCI\n");
838 rte_atomic32_clear(&run_once);
843 if (rte_eal_vfio_setup() < 0) {
844 rte_eal_init_alert("Cannot init VFIO\n");
846 rte_atomic32_clear(&run_once);
851 if (rte_eal_memory_init() < 0) {
852 rte_eal_init_alert("Cannot init memory\n");
857 /* the directories are locked during eal_hugepage_info_init */
858 eal_hugedirs_unlock();
860 if (rte_eal_memzone_init() < 0) {
861 rte_eal_init_alert("Cannot init memzone\n");
866 if (rte_eal_tailqs_init() < 0) {
867 rte_eal_init_alert("Cannot init tail queues for objects\n");
872 if (rte_eal_alarm_init() < 0) {
873 rte_eal_init_alert("Cannot init interrupt-handling thread\n");
874 /* rte_eal_alarm_init sets rte_errno on failure. */
878 if (rte_eal_timer_init() < 0) {
879 rte_eal_init_alert("Cannot init HPET or TSC timers\n");
884 eal_check_mem_on_local_socket();
886 if (eal_plugins_init() < 0)
887 rte_eal_init_alert("Cannot init plugins\n");
889 eal_thread_init_master(rte_config.master_lcore);
891 ret = eal_thread_dump_affinity(cpuset, RTE_CPU_AFFINITY_STR_LEN);
893 RTE_LOG(DEBUG, EAL, "Master lcore %u is ready (tid=%x;cpuset=[%s%s])\n",
894 rte_config.master_lcore, (int)thread_id, cpuset,
895 ret == 0 ? "" : "...");
897 if (rte_eal_intr_init() < 0) {
898 rte_eal_init_alert("Cannot init interrupt-handling thread\n");
902 if (rte_bus_scan()) {
903 rte_eal_init_alert("Cannot scan the buses for devices\n");
908 RTE_LCORE_FOREACH_SLAVE(i) {
911 * create communication pipes between master thread
914 if (pipe(lcore_config[i].pipe_master2slave) < 0)
915 rte_panic("Cannot create pipe\n");
916 if (pipe(lcore_config[i].pipe_slave2master) < 0)
917 rte_panic("Cannot create pipe\n");
919 lcore_config[i].state = WAIT;
921 /* create a thread for each lcore */
922 ret = pthread_create(&lcore_config[i].thread_id, NULL,
923 eal_thread_loop, NULL);
925 rte_panic("Cannot create thread\n");
927 /* Set thread_name for aid in debugging. */
928 snprintf(thread_name, RTE_MAX_THREAD_NAME_LEN,
929 "lcore-slave-%d", i);
930 ret = rte_thread_setname(lcore_config[i].thread_id,
934 "Cannot set name for lcore thread\n");
938 * Launch a dummy function on all slave lcores, so that master lcore
939 * knows they are all ready when this function returns.
941 rte_eal_mp_remote_launch(sync_func, NULL, SKIP_MASTER);
942 rte_eal_mp_wait_lcore();
944 /* Probe all the buses and devices/drivers on them */
945 if (rte_bus_probe()) {
946 rte_eal_init_alert("Cannot probe devices\n");
951 /* Probe & Initialize PCI devices */
952 if (rte_eal_pci_probe()) {
953 rte_eal_init_alert("Cannot probe PCI\n");
958 if (rte_eal_dev_init() < 0)
959 rte_eal_init_alert("Cannot init pmd devices\n");
961 rte_eal_mcfg_complete();
967 enum rte_lcore_role_t
968 rte_eal_lcore_role(unsigned lcore_id)
970 return rte_config.lcore_role[lcore_id];
974 rte_eal_process_type(void)
976 return rte_config.process_type;
979 int rte_eal_has_hugepages(void)
981 return ! internal_config.no_hugetlbfs;
985 rte_eal_check_module(const char *module_name)
987 char sysfs_mod_name[PATH_MAX];
991 if (NULL == module_name)
994 /* Check if there is sysfs mounted */
995 if (stat("/sys/module", &st) != 0) {
996 RTE_LOG(DEBUG, EAL, "sysfs is not mounted! error %i (%s)\n",
997 errno, strerror(errno));
1001 /* A module might be built-in, therefore try sysfs */
1002 n = snprintf(sysfs_mod_name, PATH_MAX, "/sys/module/%s", module_name);
1003 if (n < 0 || n > PATH_MAX) {
1004 RTE_LOG(DEBUG, EAL, "Could not format module path\n");
1008 if (stat(sysfs_mod_name, &st) != 0) {
1009 RTE_LOG(DEBUG, EAL, "Module %s not found! error %i (%s)\n",
1010 sysfs_mod_name, errno, strerror(errno));
1014 /* Module has been found */