4 * Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
5 * Copyright(c) 2012-2014 6WIND S.A.
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15 * notice, this list of conditions and the following disclaimer in
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32 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
50 #include <sys/queue.h>
52 #if defined(RTE_ARCH_X86)
56 #include <rte_common.h>
57 #include <rte_debug.h>
58 #include <rte_memory.h>
59 #include <rte_launch.h>
61 #include <rte_eal_memconfig.h>
62 #include <rte_errno.h>
63 #include <rte_per_lcore.h>
64 #include <rte_lcore.h>
65 #include <rte_service_component.h>
67 #include <rte_random.h>
68 #include <rte_cycles.h>
69 #include <rte_string_fns.h>
70 #include <rte_cpuflags.h>
71 #include <rte_interrupts.h>
74 #include <rte_devargs.h>
75 #include <rte_version.h>
76 #include <rte_atomic.h>
77 #include <malloc_heap.h>
80 #include "eal_private.h"
81 #include "eal_thread.h"
82 #include "eal_internal_cfg.h"
83 #include "eal_filesystem.h"
84 #include "eal_hugepages.h"
85 #include "eal_options.h"
88 #define MEMSIZE_IF_NO_HUGE_PAGE (64ULL * 1024ULL * 1024ULL)
90 #define SOCKET_MEM_STRLEN (RTE_MAX_NUMA_NODES * 10)
92 /* Allow the application to print its usage message too if set */
93 static rte_usage_hook_t rte_application_usage_hook = NULL;
95 /* early configuration structure, when memory config is not mmapped */
96 static struct rte_mem_config early_mem_config;
98 /* define fd variable here, because file needs to be kept open for the
99 * duration of the program, as we hold a write lock on it in the primary proc */
100 static int mem_cfg_fd = -1;
102 static struct flock wr_lock = {
104 .l_whence = SEEK_SET,
105 .l_start = offsetof(struct rte_mem_config, memseg),
106 .l_len = sizeof(early_mem_config.memseg),
109 /* Address of global and public configuration */
110 static struct rte_config rte_config = {
111 .mem_config = &early_mem_config,
114 /* internal configuration (per-core) */
115 struct lcore_config lcore_config[RTE_MAX_LCORE];
117 /* internal configuration */
118 struct internal_config internal_config;
120 /* used by rte_rdtsc() */
121 int rte_cycles_vmware_tsc_map;
123 /* Return mbuf pool ops name */
125 rte_eal_mbuf_default_mempool_ops(void)
127 return internal_config.mbuf_pool_ops_name;
130 /* Return a pointer to the configuration structure */
132 rte_eal_get_configuration(void)
138 rte_eal_iova_mode(void)
140 return rte_eal_get_configuration()->iova_mode;
143 /* parse a sysfs (or other) file containing one integer value */
145 eal_parse_sysfs_value(const char *filename, unsigned long *val)
151 if ((f = fopen(filename, "r")) == NULL) {
152 RTE_LOG(ERR, EAL, "%s(): cannot open sysfs value %s\n",
157 if (fgets(buf, sizeof(buf), f) == NULL) {
158 RTE_LOG(ERR, EAL, "%s(): cannot read sysfs value %s\n",
163 *val = strtoul(buf, &end, 0);
164 if ((buf[0] == '\0') || (end == NULL) || (*end != '\n')) {
165 RTE_LOG(ERR, EAL, "%s(): cannot parse sysfs value %s\n",
175 /* create memory configuration in shared/mmap memory. Take out
176 * a write lock on the memsegs, so we can auto-detect primary/secondary.
177 * This means we never close the file while running (auto-close on exit).
178 * We also don't lock the whole file, so that in future we can use read-locks
179 * on other parts, e.g. memzones, to detect if there are running secondary
182 rte_eal_config_create(void)
184 void *rte_mem_cfg_addr;
187 const char *pathname = eal_runtime_config_path();
189 if (internal_config.no_shconf)
192 /* map the config before hugepage address so that we don't waste a page */
193 if (internal_config.base_virtaddr != 0)
194 rte_mem_cfg_addr = (void *)
195 RTE_ALIGN_FLOOR(internal_config.base_virtaddr -
196 sizeof(struct rte_mem_config), sysconf(_SC_PAGE_SIZE));
198 rte_mem_cfg_addr = NULL;
201 mem_cfg_fd = open(pathname, O_RDWR | O_CREAT, 0660);
203 rte_panic("Cannot open '%s' for rte_mem_config\n", pathname);
206 retval = ftruncate(mem_cfg_fd, sizeof(*rte_config.mem_config));
209 rte_panic("Cannot resize '%s' for rte_mem_config\n", pathname);
212 retval = fcntl(mem_cfg_fd, F_SETLK, &wr_lock);
215 rte_exit(EXIT_FAILURE, "Cannot create lock on '%s'. Is another primary "
216 "process running?\n", pathname);
219 rte_mem_cfg_addr = mmap(rte_mem_cfg_addr, sizeof(*rte_config.mem_config),
220 PROT_READ | PROT_WRITE, MAP_SHARED, mem_cfg_fd, 0);
222 if (rte_mem_cfg_addr == MAP_FAILED){
223 rte_panic("Cannot mmap memory for rte_config\n");
225 memcpy(rte_mem_cfg_addr, &early_mem_config, sizeof(early_mem_config));
226 rte_config.mem_config = rte_mem_cfg_addr;
228 /* store address of the config in the config itself so that secondary
229 * processes could later map the config into this exact location */
230 rte_config.mem_config->mem_cfg_addr = (uintptr_t) rte_mem_cfg_addr;
234 /* attach to an existing shared memory config */
236 rte_eal_config_attach(void)
238 struct rte_mem_config *mem_config;
240 const char *pathname = eal_runtime_config_path();
242 if (internal_config.no_shconf)
246 mem_cfg_fd = open(pathname, O_RDWR);
248 rte_panic("Cannot open '%s' for rte_mem_config\n", pathname);
251 /* map it as read-only first */
252 mem_config = (struct rte_mem_config *) mmap(NULL, sizeof(*mem_config),
253 PROT_READ, MAP_SHARED, mem_cfg_fd, 0);
254 if (mem_config == MAP_FAILED)
255 rte_panic("Cannot mmap memory for rte_config! error %i (%s)\n",
256 errno, strerror(errno));
258 rte_config.mem_config = mem_config;
261 /* reattach the shared config at exact memory location primary process has it */
263 rte_eal_config_reattach(void)
265 struct rte_mem_config *mem_config;
266 void *rte_mem_cfg_addr;
268 if (internal_config.no_shconf)
271 /* save the address primary process has mapped shared config to */
272 rte_mem_cfg_addr = (void *) (uintptr_t) rte_config.mem_config->mem_cfg_addr;
274 /* unmap original config */
275 munmap(rte_config.mem_config, sizeof(struct rte_mem_config));
277 /* remap the config at proper address */
278 mem_config = (struct rte_mem_config *) mmap(rte_mem_cfg_addr,
279 sizeof(*mem_config), PROT_READ | PROT_WRITE, MAP_SHARED,
281 if (mem_config == MAP_FAILED || mem_config != rte_mem_cfg_addr) {
282 if (mem_config != MAP_FAILED)
283 /* errno is stale, don't use */
284 rte_panic("Cannot mmap memory for rte_config at [%p], got [%p]"
285 " - please use '--base-virtaddr' option\n",
286 rte_mem_cfg_addr, mem_config);
288 rte_panic("Cannot mmap memory for rte_config! error %i (%s)\n",
289 errno, strerror(errno));
293 rte_config.mem_config = mem_config;
296 /* Detect if we are a primary or a secondary process */
298 eal_proc_type_detect(void)
300 enum rte_proc_type_t ptype = RTE_PROC_PRIMARY;
301 const char *pathname = eal_runtime_config_path();
303 /* if we can open the file but not get a write-lock we are a secondary
304 * process. NOTE: if we get a file handle back, we keep that open
305 * and don't close it to prevent a race condition between multiple opens */
306 if (((mem_cfg_fd = open(pathname, O_RDWR)) >= 0) &&
307 (fcntl(mem_cfg_fd, F_SETLK, &wr_lock) < 0))
308 ptype = RTE_PROC_SECONDARY;
310 RTE_LOG(INFO, EAL, "Auto-detected process type: %s\n",
311 ptype == RTE_PROC_PRIMARY ? "PRIMARY" : "SECONDARY");
316 /* Sets up rte_config structure with the pointer to shared memory config.*/
318 rte_config_init(void)
320 rte_config.process_type = internal_config.process_type;
322 switch (rte_config.process_type){
323 case RTE_PROC_PRIMARY:
324 rte_eal_config_create();
326 case RTE_PROC_SECONDARY:
327 rte_eal_config_attach();
328 rte_eal_mcfg_wait_complete(rte_config.mem_config);
329 rte_eal_config_reattach();
332 case RTE_PROC_INVALID:
333 rte_panic("Invalid process type\n");
337 /* Unlocks hugepage directories that were locked by eal_hugepage_info_init */
339 eal_hugedirs_unlock(void)
343 for (i = 0; i < MAX_HUGEPAGE_SIZES; i++)
345 /* skip uninitialized */
346 if (internal_config.hugepage_info[i].lock_descriptor < 0)
348 /* unlock hugepage file */
349 flock(internal_config.hugepage_info[i].lock_descriptor, LOCK_UN);
350 close(internal_config.hugepage_info[i].lock_descriptor);
351 /* reset the field */
352 internal_config.hugepage_info[i].lock_descriptor = -1;
358 eal_usage(const char *prgname)
360 printf("\nUsage: %s ", prgname);
362 printf("EAL Linux options:\n"
363 " --"OPT_SOCKET_MEM" Memory to allocate on sockets (comma separated values)\n"
364 " --"OPT_HUGE_DIR" Directory where hugetlbfs is mounted\n"
365 " --"OPT_FILE_PREFIX" Prefix for hugepage filenames\n"
366 " --"OPT_BASE_VIRTADDR" Base virtual address\n"
367 " --"OPT_CREATE_UIO_DEV" Create /dev/uioX (usually done by hotplug)\n"
368 " --"OPT_VFIO_INTR" Interrupt mode for VFIO (legacy|msi|msix)\n"
370 /* Allow the application to print its usage message too if hook is set */
371 if ( rte_application_usage_hook ) {
372 printf("===== Application Usage =====\n\n");
373 rte_application_usage_hook(prgname);
377 /* Set a per-application usage message */
379 rte_set_application_usage_hook( rte_usage_hook_t usage_func )
381 rte_usage_hook_t old_func;
383 /* Will be NULL on the first call to denote the last usage routine. */
384 old_func = rte_application_usage_hook;
385 rte_application_usage_hook = usage_func;
391 eal_parse_socket_mem(char *socket_mem)
393 char * arg[RTE_MAX_NUMA_NODES];
396 uint64_t total_mem = 0;
398 len = strnlen(socket_mem, SOCKET_MEM_STRLEN);
399 if (len == SOCKET_MEM_STRLEN) {
400 RTE_LOG(ERR, EAL, "--socket-mem is too long\n");
404 /* all other error cases will be caught later */
405 if (!isdigit(socket_mem[len-1]))
408 /* split the optarg into separate socket values */
409 arg_num = rte_strsplit(socket_mem, len,
410 arg, RTE_MAX_NUMA_NODES, ',');
412 /* if split failed, or 0 arguments */
416 internal_config.force_sockets = 1;
418 /* parse each defined socket option */
420 for (i = 0; i < arg_num; i++) {
422 internal_config.socket_mem[i] = strtoull(arg[i], &end, 10);
424 /* check for invalid input */
426 (arg[i][0] == '\0') || (end == NULL) || (*end != '\0'))
428 internal_config.socket_mem[i] *= 1024ULL;
429 internal_config.socket_mem[i] *= 1024ULL;
430 total_mem += internal_config.socket_mem[i];
433 /* check if we have a positive amount of total memory */
441 eal_parse_base_virtaddr(const char *arg)
447 addr = strtoull(arg, &end, 16);
449 /* check for errors */
450 if ((errno != 0) || (arg[0] == '\0') || end == NULL || (*end != '\0'))
453 /* make sure we don't exceed 32-bit boundary on 32-bit target */
455 if (addr >= UINTPTR_MAX)
459 /* align the addr on 16M boundary, 16MB is the minimum huge page
460 * size on IBM Power architecture. If the addr is aligned to 16MB,
461 * it can align to 2MB for x86. So this alignment can also be used
463 internal_config.base_virtaddr =
464 RTE_PTR_ALIGN_CEIL((uintptr_t)addr, (size_t)RTE_PGSIZE_16M);
470 eal_parse_vfio_intr(const char *mode)
475 enum rte_intr_mode value;
477 { "legacy", RTE_INTR_MODE_LEGACY },
478 { "msi", RTE_INTR_MODE_MSI },
479 { "msix", RTE_INTR_MODE_MSIX },
482 for (i = 0; i < RTE_DIM(map); i++) {
483 if (!strcmp(mode, map[i].name)) {
484 internal_config.vfio_intr_mode = map[i].value;
491 /* Parse the arguments for --log-level only */
493 eal_log_level_parse(int argc, char **argv)
498 const int old_optind = optind;
499 const int old_optopt = optopt;
500 char * const old_optarg = optarg;
505 while ((opt = getopt_long(argc, argvopt, eal_short_options,
506 eal_long_options, &option_index)) != EOF) {
510 /* getopt is not happy, stop right now */
514 ret = (opt == OPT_LOG_LEVEL_NUM) ?
515 eal_parse_common_option(opt, optarg, &internal_config) : 0;
517 /* common parser is not happy */
522 /* restore getopt lib */
528 /* Parse the argument given in the command line of the application */
530 eal_parse_args(int argc, char **argv)
535 char *prgname = argv[0];
536 const int old_optind = optind;
537 const int old_optopt = optopt;
538 char * const old_optarg = optarg;
543 while ((opt = getopt_long(argc, argvopt, eal_short_options,
544 eal_long_options, &option_index)) != EOF) {
546 /* getopt is not happy, stop right now */
553 ret = eal_parse_common_option(opt, optarg, &internal_config);
554 /* common parser is not happy */
560 /* common parser handled this option */
569 case OPT_HUGE_DIR_NUM:
570 internal_config.hugepage_dir = strdup(optarg);
573 case OPT_FILE_PREFIX_NUM:
574 internal_config.hugefile_prefix = strdup(optarg);
577 case OPT_SOCKET_MEM_NUM:
578 if (eal_parse_socket_mem(optarg) < 0) {
579 RTE_LOG(ERR, EAL, "invalid parameters for --"
580 OPT_SOCKET_MEM "\n");
587 case OPT_BASE_VIRTADDR_NUM:
588 if (eal_parse_base_virtaddr(optarg) < 0) {
589 RTE_LOG(ERR, EAL, "invalid parameter for --"
590 OPT_BASE_VIRTADDR "\n");
597 case OPT_VFIO_INTR_NUM:
598 if (eal_parse_vfio_intr(optarg) < 0) {
599 RTE_LOG(ERR, EAL, "invalid parameters for --"
607 case OPT_CREATE_UIO_DEV_NUM:
608 internal_config.create_uio_dev = 1;
611 case OPT_MBUF_POOL_OPS_NAME_NUM:
612 internal_config.mbuf_pool_ops_name = optarg;
616 if (opt < OPT_LONG_MIN_NUM && isprint(opt)) {
617 RTE_LOG(ERR, EAL, "Option %c is not supported "
619 } else if (opt >= OPT_LONG_MIN_NUM &&
620 opt < OPT_LONG_MAX_NUM) {
621 RTE_LOG(ERR, EAL, "Option %s is not supported "
623 eal_long_options[option_index].name);
625 RTE_LOG(ERR, EAL, "Option %d is not supported "
634 if (eal_adjust_config(&internal_config) != 0) {
640 if (eal_check_common_options(&internal_config) != 0) {
647 argv[optind-1] = prgname;
651 /* restore getopt lib */
660 eal_check_mem_on_local_socket(void)
662 const struct rte_memseg *ms;
665 socket_id = rte_lcore_to_socket_id(rte_config.master_lcore);
667 ms = rte_eal_get_physmem_layout();
669 for (i = 0; i < RTE_MAX_MEMSEG; i++)
670 if (ms[i].socket_id == socket_id &&
674 RTE_LOG(WARNING, EAL, "WARNING: Master core has no "
675 "memory on local socket!\n");
679 sync_func(__attribute__((unused)) void *arg)
685 rte_eal_mcfg_complete(void)
687 /* ALL shared mem_config related INIT DONE */
688 if (rte_config.process_type == RTE_PROC_PRIMARY)
689 rte_config.mem_config->magic = RTE_MAGIC;
693 * Request iopl privilege for all RPL, returns 0 on success
694 * iopl() call is mostly for the i386 architecture. For other architectures,
695 * return -1 to indicate IO privilege can't be changed in this way.
698 rte_eal_iopl_init(void)
700 #if defined(RTE_ARCH_X86)
708 static int rte_eal_vfio_setup(void)
710 int vfio_enabled = 0;
712 if (rte_vfio_enable("vfio"))
714 vfio_enabled = rte_vfio_is_enabled("vfio");
718 /* if we are primary process, create a thread to communicate with
719 * secondary processes. the thread will use a socket to wait for
720 * requests from secondary process to send open file descriptors,
721 * because VFIO does not allow multiple open descriptors on a group or
724 if (internal_config.process_type == RTE_PROC_PRIMARY &&
725 vfio_mp_sync_setup() < 0)
733 static void rte_eal_init_alert(const char *msg)
735 fprintf(stderr, "EAL: FATAL: %s\n", msg);
736 RTE_LOG(ERR, EAL, "%s\n", msg);
739 /* Launch threads, called at application init(). */
741 rte_eal_init(int argc, char **argv)
745 static rte_atomic32_t run_once = RTE_ATOMIC32_INIT(0);
747 char cpuset[RTE_CPU_AFFINITY_STR_LEN];
748 char thread_name[RTE_MAX_THREAD_NAME_LEN];
750 /* checks if the machine is adequate */
751 if (!rte_cpu_is_supported()) {
752 rte_eal_init_alert("unsupported cpu type.");
757 if (!rte_atomic32_test_and_set(&run_once)) {
758 rte_eal_init_alert("already called initialization.");
759 rte_errno = EALREADY;
763 logid = strrchr(argv[0], '/');
764 logid = strdup(logid ? logid + 1: argv[0]);
766 thread_id = pthread_self();
768 eal_reset_internal_config(&internal_config);
770 /* set log level as early as possible */
771 eal_log_level_parse(argc, argv);
773 if (rte_eal_cpu_init() < 0) {
774 rte_eal_init_alert("Cannot detect lcores.");
779 fctret = eal_parse_args(argc, argv);
781 rte_eal_init_alert("Invalid 'command line' arguments.");
783 rte_atomic32_clear(&run_once);
787 if (eal_plugins_init() < 0) {
788 rte_eal_init_alert("Cannot init plugins\n");
790 rte_atomic32_clear(&run_once);
794 if (eal_option_device_parse()) {
796 rte_atomic32_clear(&run_once);
800 if (rte_bus_scan()) {
801 rte_eal_init_alert("Cannot scan the buses for devices\n");
803 rte_atomic32_clear(&run_once);
807 /* autodetect the iova mapping mode (default is iova_pa) */
808 rte_eal_get_configuration()->iova_mode = rte_bus_get_iommu_class();
810 if (internal_config.no_hugetlbfs == 0 &&
811 internal_config.process_type != RTE_PROC_SECONDARY &&
812 eal_hugepage_info_init() < 0) {
813 rte_eal_init_alert("Cannot get hugepage information.");
815 rte_atomic32_clear(&run_once);
819 if (internal_config.memory == 0 && internal_config.force_sockets == 0) {
820 if (internal_config.no_hugetlbfs)
821 internal_config.memory = MEMSIZE_IF_NO_HUGE_PAGE;
824 if (internal_config.vmware_tsc_map == 1) {
825 #ifdef RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT
826 rte_cycles_vmware_tsc_map = 1;
827 RTE_LOG (DEBUG, EAL, "Using VMWARE TSC MAP, "
828 "you must have monitor_control.pseudo_perfctr = TRUE\n");
830 RTE_LOG (WARNING, EAL, "Ignoring --vmware-tsc-map because "
831 "RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT is not set\n");
835 rte_srand(rte_rdtsc());
839 if (rte_eal_log_init(logid, internal_config.syslog_facility) < 0) {
840 rte_eal_init_alert("Cannot init logging.");
842 rte_atomic32_clear(&run_once);
847 if (rte_eal_vfio_setup() < 0) {
848 rte_eal_init_alert("Cannot init VFIO\n");
850 rte_atomic32_clear(&run_once);
855 if (rte_eal_memory_init() < 0) {
856 rte_eal_init_alert("Cannot init memory\n");
861 /* the directories are locked during eal_hugepage_info_init */
862 eal_hugedirs_unlock();
864 if (rte_eal_memzone_init() < 0) {
865 rte_eal_init_alert("Cannot init memzone\n");
870 if (rte_eal_tailqs_init() < 0) {
871 rte_eal_init_alert("Cannot init tail queues for objects\n");
876 if (rte_eal_alarm_init() < 0) {
877 rte_eal_init_alert("Cannot init interrupt-handling thread\n");
878 /* rte_eal_alarm_init sets rte_errno on failure. */
882 if (rte_eal_timer_init() < 0) {
883 rte_eal_init_alert("Cannot init HPET or TSC timers\n");
888 eal_check_mem_on_local_socket();
890 eal_thread_init_master(rte_config.master_lcore);
892 ret = eal_thread_dump_affinity(cpuset, RTE_CPU_AFFINITY_STR_LEN);
894 RTE_LOG(DEBUG, EAL, "Master lcore %u is ready (tid=%x;cpuset=[%s%s])\n",
895 rte_config.master_lcore, (int)thread_id, cpuset,
896 ret == 0 ? "" : "...");
898 if (rte_eal_intr_init() < 0) {
899 rte_eal_init_alert("Cannot init interrupt-handling thread\n");
903 RTE_LCORE_FOREACH_SLAVE(i) {
906 * create communication pipes between master thread
909 if (pipe(lcore_config[i].pipe_master2slave) < 0)
910 rte_panic("Cannot create pipe\n");
911 if (pipe(lcore_config[i].pipe_slave2master) < 0)
912 rte_panic("Cannot create pipe\n");
914 lcore_config[i].state = WAIT;
916 /* create a thread for each lcore */
917 ret = pthread_create(&lcore_config[i].thread_id, NULL,
918 eal_thread_loop, NULL);
920 rte_panic("Cannot create thread\n");
922 /* Set thread_name for aid in debugging. */
923 snprintf(thread_name, RTE_MAX_THREAD_NAME_LEN,
924 "lcore-slave-%d", i);
925 ret = rte_thread_setname(lcore_config[i].thread_id,
929 "Cannot set name for lcore thread\n");
933 * Launch a dummy function on all slave lcores, so that master lcore
934 * knows they are all ready when this function returns.
936 rte_eal_mp_remote_launch(sync_func, NULL, SKIP_MASTER);
937 rte_eal_mp_wait_lcore();
939 /* initialize services so vdevs register service during bus_probe. */
940 ret = rte_service_init();
942 rte_eal_init_alert("rte_service_init() failed\n");
947 /* Probe all the buses and devices/drivers on them */
948 if (rte_bus_probe()) {
949 rte_eal_init_alert("Cannot probe devices\n");
954 /* initialize default service/lcore mappings and start running. Ignore
955 * -ENOTSUP, as it indicates no service coremask passed to EAL.
957 ret = rte_service_start_with_defaults();
958 if (ret < 0 && ret != -ENOTSUP) {
963 rte_eal_mcfg_complete();
969 enum rte_lcore_role_t
970 rte_eal_lcore_role(unsigned lcore_id)
972 return rte_config.lcore_role[lcore_id];
976 rte_eal_process_type(void)
978 return rte_config.process_type;
981 int rte_eal_has_hugepages(void)
983 return ! internal_config.no_hugetlbfs;
986 int rte_eal_has_pci(void)
988 return !internal_config.no_pci;
991 int rte_eal_create_uio_dev(void)
993 return internal_config.create_uio_dev;
997 rte_eal_vfio_intr_mode(void)
999 return internal_config.vfio_intr_mode;
1003 rte_eal_check_module(const char *module_name)
1005 char sysfs_mod_name[PATH_MAX];
1009 if (NULL == module_name)
1012 /* Check if there is sysfs mounted */
1013 if (stat("/sys/module", &st) != 0) {
1014 RTE_LOG(DEBUG, EAL, "sysfs is not mounted! error %i (%s)\n",
1015 errno, strerror(errno));
1019 /* A module might be built-in, therefore try sysfs */
1020 n = snprintf(sysfs_mod_name, PATH_MAX, "/sys/module/%s", module_name);
1021 if (n < 0 || n > PATH_MAX) {
1022 RTE_LOG(DEBUG, EAL, "Could not format module path\n");
1026 if (stat(sysfs_mod_name, &st) != 0) {
1027 RTE_LOG(DEBUG, EAL, "Module %s not found! error %i (%s)\n",
1028 sysfs_mod_name, errno, strerror(errno));
1032 /* Module has been found */