4 * Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
5 * Copyright(c) 2012-2014 6WIND S.A.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * * Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * * Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
18 * * Neither the name of Intel Corporation nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
25 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
26 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
27 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
28 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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_per_lcore.h>
65 #include <rte_lcore.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>
73 #include <rte_devargs.h>
74 #include <rte_common.h>
75 #include <rte_version.h>
76 #include <rte_atomic.h>
77 #include <malloc_heap.h>
79 #include "eal_private.h"
80 #include "eal_thread.h"
81 #include "eal_internal_cfg.h"
82 #include "eal_filesystem.h"
83 #include "eal_hugepages.h"
84 #include "eal_options.h"
86 #define MEMSIZE_IF_NO_HUGE_PAGE (64ULL * 1024ULL * 1024ULL)
88 #define SOCKET_MEM_STRLEN (RTE_MAX_NUMA_NODES * 10)
90 /* Allow the application to print its usage message too if set */
91 static rte_usage_hook_t rte_application_usage_hook = NULL;
93 /* early configuration structure, when memory config is not mmapped */
94 static struct rte_mem_config early_mem_config;
96 /* define fd variable here, because file needs to be kept open for the
97 * duration of the program, as we hold a write lock on it in the primary proc */
98 static int mem_cfg_fd = -1;
100 static struct flock wr_lock = {
102 .l_whence = SEEK_SET,
103 .l_start = offsetof(struct rte_mem_config, memseg),
104 .l_len = sizeof(early_mem_config.memseg),
107 /* Address of global and public configuration */
108 static struct rte_config rte_config = {
109 .mem_config = &early_mem_config,
112 /* internal configuration (per-core) */
113 struct lcore_config lcore_config[RTE_MAX_LCORE];
115 /* internal configuration */
116 struct internal_config internal_config;
118 /* used by rte_rdtsc() */
119 int rte_cycles_vmware_tsc_map;
121 /* Return a pointer to the configuration structure */
123 rte_eal_get_configuration(void)
128 /* parse a sysfs (or other) file containing one integer value */
130 eal_parse_sysfs_value(const char *filename, unsigned long *val)
136 if ((f = fopen(filename, "r")) == NULL) {
137 RTE_LOG(ERR, EAL, "%s(): cannot open sysfs value %s\n",
142 if (fgets(buf, sizeof(buf), f) == NULL) {
143 RTE_LOG(ERR, EAL, "%s(): cannot read sysfs value %s\n",
148 *val = strtoul(buf, &end, 0);
149 if ((buf[0] == '\0') || (end == NULL) || (*end != '\n')) {
150 RTE_LOG(ERR, EAL, "%s(): cannot parse sysfs value %s\n",
160 /* create memory configuration in shared/mmap memory. Take out
161 * a write lock on the memsegs, so we can auto-detect primary/secondary.
162 * This means we never close the file while running (auto-close on exit).
163 * We also don't lock the whole file, so that in future we can use read-locks
164 * on other parts, e.g. memzones, to detect if there are running secondary
167 rte_eal_config_create(void)
169 void *rte_mem_cfg_addr;
172 const char *pathname = eal_runtime_config_path();
174 if (internal_config.no_shconf)
177 /* map the config before hugepage address so that we don't waste a page */
178 if (internal_config.base_virtaddr != 0)
179 rte_mem_cfg_addr = (void *)
180 RTE_ALIGN_FLOOR(internal_config.base_virtaddr -
181 sizeof(struct rte_mem_config), sysconf(_SC_PAGE_SIZE));
183 rte_mem_cfg_addr = NULL;
186 mem_cfg_fd = open(pathname, O_RDWR | O_CREAT, 0660);
188 rte_panic("Cannot open '%s' for rte_mem_config\n", pathname);
191 retval = ftruncate(mem_cfg_fd, sizeof(*rte_config.mem_config));
194 rte_panic("Cannot resize '%s' for rte_mem_config\n", pathname);
197 retval = fcntl(mem_cfg_fd, F_SETLK, &wr_lock);
200 rte_exit(EXIT_FAILURE, "Cannot create lock on '%s'. Is another primary "
201 "process running?\n", pathname);
204 rte_mem_cfg_addr = mmap(rte_mem_cfg_addr, sizeof(*rte_config.mem_config),
205 PROT_READ | PROT_WRITE, MAP_SHARED, mem_cfg_fd, 0);
207 if (rte_mem_cfg_addr == MAP_FAILED){
208 rte_panic("Cannot mmap memory for rte_config\n");
210 memcpy(rte_mem_cfg_addr, &early_mem_config, sizeof(early_mem_config));
211 rte_config.mem_config = (struct rte_mem_config *) rte_mem_cfg_addr;
213 /* store address of the config in the config itself so that secondary
214 * processes could later map the config into this exact location */
215 rte_config.mem_config->mem_cfg_addr = (uintptr_t) rte_mem_cfg_addr;
219 /* attach to an existing shared memory config */
221 rte_eal_config_attach(void)
223 struct rte_mem_config *mem_config;
225 const char *pathname = eal_runtime_config_path();
227 if (internal_config.no_shconf)
231 mem_cfg_fd = open(pathname, O_RDWR);
233 rte_panic("Cannot open '%s' for rte_mem_config\n", pathname);
236 /* map it as read-only first */
237 mem_config = (struct rte_mem_config *) mmap(NULL, sizeof(*mem_config),
238 PROT_READ, MAP_SHARED, mem_cfg_fd, 0);
239 if (mem_config == MAP_FAILED)
240 rte_panic("Cannot mmap memory for rte_config\n");
242 rte_config.mem_config = mem_config;
245 /* reattach the shared config at exact memory location primary process has it */
247 rte_eal_config_reattach(void)
249 struct rte_mem_config *mem_config;
250 void *rte_mem_cfg_addr;
252 if (internal_config.no_shconf)
255 /* save the address primary process has mapped shared config to */
256 rte_mem_cfg_addr = (void *) (uintptr_t) rte_config.mem_config->mem_cfg_addr;
258 /* unmap original config */
259 munmap(rte_config.mem_config, sizeof(struct rte_mem_config));
261 /* remap the config at proper address */
262 mem_config = (struct rte_mem_config *) mmap(rte_mem_cfg_addr,
263 sizeof(*mem_config), PROT_READ | PROT_WRITE, MAP_SHARED,
266 if (mem_config == MAP_FAILED || mem_config != rte_mem_cfg_addr)
267 rte_panic("Cannot mmap memory for rte_config\n");
269 rte_config.mem_config = mem_config;
272 /* Detect if we are a primary or a secondary process */
274 eal_proc_type_detect(void)
276 enum rte_proc_type_t ptype = RTE_PROC_PRIMARY;
277 const char *pathname = eal_runtime_config_path();
279 /* if we can open the file but not get a write-lock we are a secondary
280 * process. NOTE: if we get a file handle back, we keep that open
281 * and don't close it to prevent a race condition between multiple opens */
282 if (((mem_cfg_fd = open(pathname, O_RDWR)) >= 0) &&
283 (fcntl(mem_cfg_fd, F_SETLK, &wr_lock) < 0))
284 ptype = RTE_PROC_SECONDARY;
286 RTE_LOG(INFO, EAL, "Auto-detected process type: %s\n",
287 ptype == RTE_PROC_PRIMARY ? "PRIMARY" : "SECONDARY");
292 /* Sets up rte_config structure with the pointer to shared memory config.*/
294 rte_config_init(void)
296 rte_config.process_type = internal_config.process_type;
298 switch (rte_config.process_type){
299 case RTE_PROC_PRIMARY:
300 rte_eal_config_create();
302 case RTE_PROC_SECONDARY:
303 rte_eal_config_attach();
304 rte_eal_mcfg_wait_complete(rte_config.mem_config);
305 rte_eal_config_reattach();
308 case RTE_PROC_INVALID:
309 rte_panic("Invalid process type\n");
313 /* Unlocks hugepage directories that were locked by eal_hugepage_info_init */
315 eal_hugedirs_unlock(void)
319 for (i = 0; i < MAX_HUGEPAGE_SIZES; i++)
321 /* skip uninitialized */
322 if (internal_config.hugepage_info[i].lock_descriptor < 0)
324 /* unlock hugepage file */
325 flock(internal_config.hugepage_info[i].lock_descriptor, LOCK_UN);
326 close(internal_config.hugepage_info[i].lock_descriptor);
327 /* reset the field */
328 internal_config.hugepage_info[i].lock_descriptor = -1;
334 eal_usage(const char *prgname)
336 printf("\nUsage: %s ", prgname);
338 printf("EAL Linux options:\n"
339 " --"OPT_SOCKET_MEM" Memory to allocate on sockets (comma separated values)\n"
340 " --"OPT_HUGE_DIR" Directory where hugetlbfs is mounted\n"
341 " --"OPT_FILE_PREFIX" Prefix for hugepage filenames\n"
342 " --"OPT_BASE_VIRTADDR" Base virtual address\n"
343 " --"OPT_CREATE_UIO_DEV" Create /dev/uioX (usually done by hotplug)\n"
344 " --"OPT_VFIO_INTR" Interrupt mode for VFIO (legacy|msi|msix)\n"
345 " --"OPT_XEN_DOM0" Support running on Xen dom0 without hugetlbfs\n"
347 /* Allow the application to print its usage message too if hook is set */
348 if ( rte_application_usage_hook ) {
349 printf("===== Application Usage =====\n\n");
350 rte_application_usage_hook(prgname);
354 /* Set a per-application usage message */
356 rte_set_application_usage_hook( rte_usage_hook_t usage_func )
358 rte_usage_hook_t old_func;
360 /* Will be NULL on the first call to denote the last usage routine. */
361 old_func = rte_application_usage_hook;
362 rte_application_usage_hook = usage_func;
368 eal_parse_socket_mem(char *socket_mem)
370 char * arg[RTE_MAX_NUMA_NODES];
373 uint64_t total_mem = 0;
375 len = strnlen(socket_mem, SOCKET_MEM_STRLEN);
376 if (len == SOCKET_MEM_STRLEN) {
377 RTE_LOG(ERR, EAL, "--socket-mem is too long\n");
381 /* all other error cases will be caught later */
382 if (!isdigit(socket_mem[len-1]))
385 /* split the optarg into separate socket values */
386 arg_num = rte_strsplit(socket_mem, len,
387 arg, RTE_MAX_NUMA_NODES, ',');
389 /* if split failed, or 0 arguments */
393 internal_config.force_sockets = 1;
395 /* parse each defined socket option */
397 for (i = 0; i < arg_num; i++) {
399 internal_config.socket_mem[i] = strtoull(arg[i], &end, 10);
401 /* check for invalid input */
403 (arg[i][0] == '\0') || (end == NULL) || (*end != '\0'))
405 internal_config.socket_mem[i] *= 1024ULL;
406 internal_config.socket_mem[i] *= 1024ULL;
407 total_mem += internal_config.socket_mem[i];
410 /* check if we have a positive amount of total memory */
418 eal_parse_base_virtaddr(const char *arg)
424 addr = strtoull(arg, &end, 16);
426 /* check for errors */
427 if ((errno != 0) || (arg[0] == '\0') || end == NULL || (*end != '\0'))
430 /* make sure we don't exceed 32-bit boundary on 32-bit target */
432 if (addr >= UINTPTR_MAX)
436 /* align the addr on 16M boundary, 16MB is the minimum huge page
437 * size on IBM Power architecture. If the addr is aligned to 16MB,
438 * it can align to 2MB for x86. So this alignment can also be used
440 internal_config.base_virtaddr =
441 RTE_PTR_ALIGN_CEIL((uintptr_t)addr, (size_t)RTE_PGSIZE_16M);
447 eal_parse_vfio_intr(const char *mode)
452 enum rte_intr_mode value;
454 { "legacy", RTE_INTR_MODE_LEGACY },
455 { "msi", RTE_INTR_MODE_MSI },
456 { "msix", RTE_INTR_MODE_MSIX },
459 for (i = 0; i < RTE_DIM(map); i++) {
460 if (!strcmp(mode, map[i].name)) {
461 internal_config.vfio_intr_mode = map[i].value;
468 /* Parse the arguments for --log-level only */
470 eal_log_level_parse(int argc, char **argv)
475 const int old_optind = optind;
476 const int old_optopt = optopt;
477 char * const old_optarg = optarg;
482 eal_reset_internal_config(&internal_config);
484 while ((opt = getopt_long(argc, argvopt, eal_short_options,
485 eal_long_options, &option_index)) != EOF) {
489 /* getopt is not happy, stop right now */
493 ret = (opt == OPT_LOG_LEVEL_NUM) ?
494 eal_parse_common_option(opt, optarg, &internal_config) : 0;
496 /* common parser is not happy */
501 /* restore getopt lib */
507 /* Parse the argument given in the command line of the application */
509 eal_parse_args(int argc, char **argv)
514 char *prgname = argv[0];
515 const int old_optind = optind;
516 const int old_optopt = optopt;
517 char * const old_optarg = optarg;
522 while ((opt = getopt_long(argc, argvopt, eal_short_options,
523 eal_long_options, &option_index)) != EOF) {
525 /* getopt is not happy, stop right now */
532 ret = eal_parse_common_option(opt, optarg, &internal_config);
533 /* common parser is not happy */
539 /* common parser handled this option */
549 case OPT_XEN_DOM0_NUM:
550 #ifdef RTE_LIBRTE_XEN_DOM0
551 internal_config.xen_dom0_support = 1;
553 RTE_LOG(ERR, EAL, "Can't support DPDK app "
554 "running on Dom0, please configure"
555 " RTE_LIBRTE_XEN_DOM0=y\n");
561 case OPT_HUGE_DIR_NUM:
562 internal_config.hugepage_dir = optarg;
565 case OPT_FILE_PREFIX_NUM:
566 internal_config.hugefile_prefix = optarg;
569 case OPT_SOCKET_MEM_NUM:
570 if (eal_parse_socket_mem(optarg) < 0) {
571 RTE_LOG(ERR, EAL, "invalid parameters for --"
572 OPT_SOCKET_MEM "\n");
579 case OPT_BASE_VIRTADDR_NUM:
580 if (eal_parse_base_virtaddr(optarg) < 0) {
581 RTE_LOG(ERR, EAL, "invalid parameter for --"
582 OPT_BASE_VIRTADDR "\n");
589 case OPT_VFIO_INTR_NUM:
590 if (eal_parse_vfio_intr(optarg) < 0) {
591 RTE_LOG(ERR, EAL, "invalid parameters for --"
599 case OPT_CREATE_UIO_DEV_NUM:
600 internal_config.create_uio_dev = 1;
604 if (opt < OPT_LONG_MIN_NUM && isprint(opt)) {
605 RTE_LOG(ERR, EAL, "Option %c is not supported "
607 } else if (opt >= OPT_LONG_MIN_NUM &&
608 opt < OPT_LONG_MAX_NUM) {
609 RTE_LOG(ERR, EAL, "Option %s is not supported "
611 eal_long_options[option_index].name);
613 RTE_LOG(ERR, EAL, "Option %d is not supported "
622 if (eal_adjust_config(&internal_config) != 0) {
628 if (eal_check_common_options(&internal_config) != 0) {
634 /* --xen-dom0 doesn't make sense with --socket-mem */
635 if (internal_config.xen_dom0_support && internal_config.force_sockets == 1) {
636 RTE_LOG(ERR, EAL, "Options --"OPT_SOCKET_MEM" cannot be specified "
637 "together with --"OPT_XEN_DOM0"\n");
644 argv[optind-1] = prgname;
648 /* restore getopt lib */
657 eal_check_mem_on_local_socket(void)
659 const struct rte_memseg *ms;
662 socket_id = rte_lcore_to_socket_id(rte_config.master_lcore);
664 ms = rte_eal_get_physmem_layout();
666 for (i = 0; i < RTE_MAX_MEMSEG; i++)
667 if (ms[i].socket_id == socket_id &&
671 RTE_LOG(WARNING, EAL, "WARNING: Master core has no "
672 "memory on local socket!\n");
676 sync_func(__attribute__((unused)) void *arg)
682 rte_eal_mcfg_complete(void)
684 /* ALL shared mem_config related INIT DONE */
685 if (rte_config.process_type == RTE_PROC_PRIMARY)
686 rte_config.mem_config->magic = RTE_MAGIC;
690 * Request iopl privilege for all RPL, returns 0 on success
691 * iopl() call is mostly for the i386 architecture. For other architectures,
692 * return -1 to indicate IO privilege can't be changed in this way.
695 rte_eal_iopl_init(void)
697 #if defined(RTE_ARCH_X86)
704 /* Launch threads, called at application init(). */
706 rte_eal_init(int argc, char **argv)
710 static rte_atomic32_t run_once = RTE_ATOMIC32_INIT(0);
712 char cpuset[RTE_CPU_AFFINITY_STR_LEN];
713 char thread_name[RTE_MAX_THREAD_NAME_LEN];
715 if (!rte_atomic32_test_and_set(&run_once))
718 logid = strrchr(argv[0], '/');
719 logid = strdup(logid ? logid + 1: argv[0]);
721 thread_id = pthread_self();
723 if (rte_eal_log_early_init() < 0)
724 rte_panic("Cannot init early logs\n");
726 eal_log_level_parse(argc, argv);
728 /* set log level as early as possible */
729 rte_set_log_level(internal_config.log_level);
731 if (rte_eal_cpu_init() < 0)
732 rte_panic("Cannot detect lcores\n");
734 fctret = eal_parse_args(argc, argv);
738 if (internal_config.no_hugetlbfs == 0 &&
739 internal_config.process_type != RTE_PROC_SECONDARY &&
740 internal_config.xen_dom0_support == 0 &&
741 eal_hugepage_info_init() < 0)
742 rte_panic("Cannot get hugepage information\n");
744 if (internal_config.memory == 0 && internal_config.force_sockets == 0) {
745 if (internal_config.no_hugetlbfs)
746 internal_config.memory = MEMSIZE_IF_NO_HUGE_PAGE;
749 if (internal_config.vmware_tsc_map == 1) {
750 #ifdef RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT
751 rte_cycles_vmware_tsc_map = 1;
752 RTE_LOG (DEBUG, EAL, "Using VMWARE TSC MAP, "
753 "you must have monitor_control.pseudo_perfctr = TRUE\n");
755 RTE_LOG (WARNING, EAL, "Ignoring --vmware-tsc-map because "
756 "RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT is not set\n");
760 rte_srand(rte_rdtsc());
764 if (rte_eal_pci_init() < 0)
765 rte_panic("Cannot init PCI\n");
767 #ifdef RTE_LIBRTE_IVSHMEM
768 if (rte_eal_ivshmem_init() < 0)
769 rte_panic("Cannot init IVSHMEM\n");
772 if (rte_eal_memory_init() < 0)
773 rte_panic("Cannot init memory\n");
775 /* the directories are locked during eal_hugepage_info_init */
776 eal_hugedirs_unlock();
778 if (rte_eal_memzone_init() < 0)
779 rte_panic("Cannot init memzone\n");
781 if (rte_eal_tailqs_init() < 0)
782 rte_panic("Cannot init tail queues for objects\n");
784 #ifdef RTE_LIBRTE_IVSHMEM
785 if (rte_eal_ivshmem_obj_init() < 0)
786 rte_panic("Cannot init IVSHMEM objects\n");
789 if (rte_eal_log_init(logid, internal_config.syslog_facility) < 0)
790 rte_panic("Cannot init logs\n");
792 if (rte_eal_alarm_init() < 0)
793 rte_panic("Cannot init interrupt-handling thread\n");
795 if (rte_eal_timer_init() < 0)
796 rte_panic("Cannot init HPET or TSC timers\n");
798 eal_check_mem_on_local_socket();
800 if (eal_plugins_init() < 0)
801 rte_panic("Cannot init plugins\n");
803 eal_thread_init_master(rte_config.master_lcore);
805 ret = eal_thread_dump_affinity(cpuset, RTE_CPU_AFFINITY_STR_LEN);
807 RTE_LOG(DEBUG, EAL, "Master lcore %u is ready (tid=%x;cpuset=[%s%s])\n",
808 rte_config.master_lcore, (int)thread_id, cpuset,
809 ret == 0 ? "" : "...");
811 if (rte_eal_dev_init() < 0)
812 rte_panic("Cannot init pmd devices\n");
814 if (rte_eal_intr_init() < 0)
815 rte_panic("Cannot init interrupt-handling thread\n");
817 RTE_LCORE_FOREACH_SLAVE(i) {
820 * create communication pipes between master thread
823 if (pipe(lcore_config[i].pipe_master2slave) < 0)
824 rte_panic("Cannot create pipe\n");
825 if (pipe(lcore_config[i].pipe_slave2master) < 0)
826 rte_panic("Cannot create pipe\n");
828 lcore_config[i].state = WAIT;
830 /* create a thread for each lcore */
831 ret = pthread_create(&lcore_config[i].thread_id, NULL,
832 eal_thread_loop, NULL);
834 rte_panic("Cannot create thread\n");
836 /* Set thread_name for aid in debugging. */
837 snprintf(thread_name, RTE_MAX_THREAD_NAME_LEN,
838 "lcore-slave-%d", i);
839 ret = rte_thread_setname(lcore_config[i].thread_id,
843 "Cannot set name for lcore thread\n");
847 * Launch a dummy function on all slave lcores, so that master lcore
848 * knows they are all ready when this function returns.
850 rte_eal_mp_remote_launch(sync_func, NULL, SKIP_MASTER);
851 rte_eal_mp_wait_lcore();
853 /* Probe & Initialize PCI devices */
854 if (rte_eal_pci_probe())
855 rte_panic("Cannot probe PCI\n");
857 rte_eal_mcfg_complete();
863 enum rte_lcore_role_t
864 rte_eal_lcore_role(unsigned lcore_id)
866 return rte_config.lcore_role[lcore_id];
870 rte_eal_process_type(void)
872 return rte_config.process_type;
875 int rte_eal_has_hugepages(void)
877 return ! internal_config.no_hugetlbfs;
881 rte_eal_check_module(const char *module_name)
883 char sysfs_mod_name[PATH_MAX];
887 if (NULL == module_name)
890 /* Check if there is sysfs mounted */
891 if (stat("/sys/module", &st) != 0) {
892 RTE_LOG(DEBUG, EAL, "sysfs is not mounted! error %i (%s)\n",
893 errno, strerror(errno));
897 /* A module might be built-in, therefore try sysfs */
898 n = snprintf(sysfs_mod_name, PATH_MAX, "/sys/module/%s", module_name);
899 if (n < 0 || n > PATH_MAX) {
900 RTE_LOG(DEBUG, EAL, "Could not format module path\n");
904 if (stat(sysfs_mod_name, &st) != 0) {
905 RTE_LOG(DEBUG, EAL, "Module %s not found! error %i (%s)\n",
906 sysfs_mod_name, errno, strerror(errno));
910 /* Module has been found */