4 * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
5 * Copyright(c) 2012-2014 6WIND S.A.
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9 * modification, are permitted provided that the following conditions
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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
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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
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30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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32 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
51 #include <sys/queue.h>
52 #if defined(RTE_ARCH_X86_64) || defined(RTE_ARCH_I686)
56 #include <rte_common.h>
57 #include <rte_debug.h>
58 #include <rte_memory.h>
59 #include <rte_memzone.h>
60 #include <rte_launch.h>
62 #include <rte_eal_memconfig.h>
63 #include <rte_per_lcore.h>
64 #include <rte_lcore.h>
66 #include <rte_random.h>
67 #include <rte_cycles.h>
68 #include <rte_string_fns.h>
69 #include <rte_cpuflags.h>
70 #include <rte_interrupts.h>
72 #include <rte_devargs.h>
73 #include <rte_common.h>
74 #include <rte_version.h>
75 #include <rte_atomic.h>
76 #include <malloc_heap.h>
78 #include "eal_private.h"
79 #include "eal_thread.h"
80 #include "eal_internal_cfg.h"
81 #include "eal_filesystem.h"
82 #include "eal_hugepages.h"
83 #include "eal_options.h"
85 #define MEMSIZE_IF_NO_HUGE_PAGE (64ULL * 1024ULL * 1024ULL)
87 #define SOCKET_MEM_STRLEN (RTE_MAX_NUMA_NODES * 10)
89 /* Allow the application to print its usage message too if set */
90 static rte_usage_hook_t rte_application_usage_hook = NULL;
92 /* early configuration structure, when memory config is not mmapped */
93 static struct rte_mem_config early_mem_config;
95 /* define fd variable here, because file needs to be kept open for the
96 * duration of the program, as we hold a write lock on it in the primary proc */
97 static int mem_cfg_fd = -1;
99 static struct flock wr_lock = {
101 .l_whence = SEEK_SET,
102 .l_start = offsetof(struct rte_mem_config, memseg),
103 .l_len = sizeof(early_mem_config.memseg),
106 /* Address of global and public configuration */
107 static struct rte_config rte_config = {
108 .mem_config = &early_mem_config,
111 /* internal configuration (per-core) */
112 struct lcore_config lcore_config[RTE_MAX_LCORE];
114 /* internal configuration */
115 struct internal_config internal_config;
117 /* used by rte_rdtsc() */
118 int rte_cycles_vmware_tsc_map;
120 /* Return a pointer to the configuration structure */
122 rte_eal_get_configuration(void)
127 /* parse a sysfs (or other) file containing one integer value */
129 eal_parse_sysfs_value(const char *filename, unsigned long *val)
135 if ((f = fopen(filename, "r")) == NULL) {
136 RTE_LOG(ERR, EAL, "%s(): cannot open sysfs value %s\n",
141 if (fgets(buf, sizeof(buf), f) == NULL) {
142 RTE_LOG(ERR, EAL, "%s(): cannot read sysfs value %s\n",
147 *val = strtoul(buf, &end, 0);
148 if ((buf[0] == '\0') || (end == NULL) || (*end != '\n')) {
149 RTE_LOG(ERR, EAL, "%s(): cannot parse sysfs value %s\n",
159 /* create memory configuration in shared/mmap memory. Take out
160 * a write lock on the memsegs, so we can auto-detect primary/secondary.
161 * This means we never close the file while running (auto-close on exit).
162 * We also don't lock the whole file, so that in future we can use read-locks
163 * on other parts, e.g. memzones, to detect if there are running secondary
166 rte_eal_config_create(void)
168 void *rte_mem_cfg_addr;
171 const char *pathname = eal_runtime_config_path();
173 if (internal_config.no_shconf)
176 /* map the config before hugepage address so that we don't waste a page */
177 if (internal_config.base_virtaddr != 0)
178 rte_mem_cfg_addr = (void *)
179 RTE_ALIGN_FLOOR(internal_config.base_virtaddr -
180 sizeof(struct rte_mem_config), sysconf(_SC_PAGE_SIZE));
182 rte_mem_cfg_addr = NULL;
185 mem_cfg_fd = open(pathname, O_RDWR | O_CREAT, 0660);
187 rte_panic("Cannot open '%s' for rte_mem_config\n", pathname);
190 retval = ftruncate(mem_cfg_fd, sizeof(*rte_config.mem_config));
193 rte_panic("Cannot resize '%s' for rte_mem_config\n", pathname);
196 retval = fcntl(mem_cfg_fd, F_SETLK, &wr_lock);
199 rte_exit(EXIT_FAILURE, "Cannot create lock on '%s'. Is another primary "
200 "process running?\n", pathname);
203 rte_mem_cfg_addr = mmap(rte_mem_cfg_addr, sizeof(*rte_config.mem_config),
204 PROT_READ | PROT_WRITE, MAP_SHARED, mem_cfg_fd, 0);
206 if (rte_mem_cfg_addr == MAP_FAILED){
207 rte_panic("Cannot mmap memory for rte_config\n");
209 memcpy(rte_mem_cfg_addr, &early_mem_config, sizeof(early_mem_config));
210 rte_config.mem_config = (struct rte_mem_config *) rte_mem_cfg_addr;
212 /* store address of the config in the config itself so that secondary
213 * processes could later map the config into this exact location */
214 rte_config.mem_config->mem_cfg_addr = (uintptr_t) rte_mem_cfg_addr;
218 /* attach to an existing shared memory config */
220 rte_eal_config_attach(void)
222 struct rte_mem_config *mem_config;
224 const char *pathname = eal_runtime_config_path();
226 if (internal_config.no_shconf)
230 mem_cfg_fd = open(pathname, O_RDWR);
232 rte_panic("Cannot open '%s' for rte_mem_config\n", pathname);
235 /* map it as read-only first */
236 mem_config = (struct rte_mem_config *) mmap(NULL, sizeof(*mem_config),
237 PROT_READ, MAP_SHARED, mem_cfg_fd, 0);
238 if (mem_config == MAP_FAILED)
239 rte_panic("Cannot mmap memory for rte_config\n");
241 rte_config.mem_config = mem_config;
244 /* reattach the shared config at exact memory location primary process has it */
246 rte_eal_config_reattach(void)
248 struct rte_mem_config *mem_config;
249 void *rte_mem_cfg_addr;
251 if (internal_config.no_shconf)
254 /* save the address primary process has mapped shared config to */
255 rte_mem_cfg_addr = (void *) (uintptr_t) rte_config.mem_config->mem_cfg_addr;
257 /* unmap original config */
258 munmap(rte_config.mem_config, sizeof(struct rte_mem_config));
260 /* remap the config at proper address */
261 mem_config = (struct rte_mem_config *) mmap(rte_mem_cfg_addr,
262 sizeof(*mem_config), PROT_READ | PROT_WRITE, MAP_SHARED,
265 if (mem_config == MAP_FAILED || mem_config != rte_mem_cfg_addr)
266 rte_panic("Cannot mmap memory for rte_config\n");
268 rte_config.mem_config = mem_config;
271 /* Detect if we are a primary or a secondary process */
273 eal_proc_type_detect(void)
275 enum rte_proc_type_t ptype = RTE_PROC_PRIMARY;
276 const char *pathname = eal_runtime_config_path();
278 /* if we can open the file but not get a write-lock we are a secondary
279 * process. NOTE: if we get a file handle back, we keep that open
280 * and don't close it to prevent a race condition between multiple opens */
281 if (((mem_cfg_fd = open(pathname, O_RDWR)) >= 0) &&
282 (fcntl(mem_cfg_fd, F_SETLK, &wr_lock) < 0))
283 ptype = RTE_PROC_SECONDARY;
285 RTE_LOG(INFO, EAL, "Auto-detected process type: %s\n",
286 ptype == RTE_PROC_PRIMARY ? "PRIMARY" : "SECONDARY");
291 /* Sets up rte_config structure with the pointer to shared memory config.*/
293 rte_config_init(void)
295 rte_config.process_type = internal_config.process_type;
297 switch (rte_config.process_type){
298 case RTE_PROC_PRIMARY:
299 rte_eal_config_create();
301 case RTE_PROC_SECONDARY:
302 rte_eal_config_attach();
303 rte_eal_mcfg_wait_complete(rte_config.mem_config);
304 rte_eal_config_reattach();
307 case RTE_PROC_INVALID:
308 rte_panic("Invalid process type\n");
312 /* Unlocks hugepage directories that were locked by eal_hugepage_info_init */
314 eal_hugedirs_unlock(void)
318 for (i = 0; i < MAX_HUGEPAGE_SIZES; i++)
320 /* skip uninitialized */
321 if (internal_config.hugepage_info[i].lock_descriptor < 0)
323 /* unlock hugepage file */
324 flock(internal_config.hugepage_info[i].lock_descriptor, LOCK_UN);
325 close(internal_config.hugepage_info[i].lock_descriptor);
326 /* reset the field */
327 internal_config.hugepage_info[i].lock_descriptor = -1;
333 eal_usage(const char *prgname)
335 printf("\nUsage: %s ", prgname);
337 printf("EAL Linux options:\n"
338 " --"OPT_SOCKET_MEM" Memory to allocate on sockets (comma separated values)\n"
339 " --"OPT_HUGE_DIR" Directory where hugetlbfs is mounted\n"
340 " --"OPT_FILE_PREFIX" Prefix for hugepage filenames\n"
341 " --"OPT_BASE_VIRTADDR" Base virtual address\n"
342 " --"OPT_CREATE_UIO_DEV" Create /dev/uioX (usually done by hotplug)\n"
343 " --"OPT_VFIO_INTR" Interrupt mode for VFIO (legacy|msi|msix)\n"
344 " --"OPT_XEN_DOM0" Support running on Xen dom0 without hugetlbfs\n"
346 /* Allow the application to print its usage message too if hook is set */
347 if ( rte_application_usage_hook ) {
348 printf("===== Application Usage =====\n\n");
349 rte_application_usage_hook(prgname);
353 /* Set a per-application usage message */
355 rte_set_application_usage_hook( rte_usage_hook_t usage_func )
357 rte_usage_hook_t old_func;
359 /* Will be NULL on the first call to denote the last usage routine. */
360 old_func = rte_application_usage_hook;
361 rte_application_usage_hook = usage_func;
367 eal_parse_socket_mem(char *socket_mem)
369 char * arg[RTE_MAX_NUMA_NODES];
372 uint64_t total_mem = 0;
374 len = strnlen(socket_mem, SOCKET_MEM_STRLEN);
375 if (len == SOCKET_MEM_STRLEN) {
376 RTE_LOG(ERR, EAL, "--socket-mem is too long\n");
380 /* all other error cases will be caught later */
381 if (!isdigit(socket_mem[len-1]))
384 /* split the optarg into separate socket values */
385 arg_num = rte_strsplit(socket_mem, len,
386 arg, RTE_MAX_NUMA_NODES, ',');
388 /* if split failed, or 0 arguments */
392 internal_config.force_sockets = 1;
394 /* parse each defined socket option */
396 for (i = 0; i < arg_num; i++) {
398 internal_config.socket_mem[i] = strtoull(arg[i], &end, 10);
400 /* check for invalid input */
402 (arg[i][0] == '\0') || (end == NULL) || (*end != '\0'))
404 internal_config.socket_mem[i] *= 1024ULL;
405 internal_config.socket_mem[i] *= 1024ULL;
406 total_mem += internal_config.socket_mem[i];
409 /* check if we have a positive amount of total memory */
417 eal_parse_base_virtaddr(const char *arg)
423 addr = strtoull(arg, &end, 16);
425 /* check for errors */
426 if ((errno != 0) || (arg[0] == '\0') || end == NULL || (*end != '\0'))
429 /* make sure we don't exceed 32-bit boundary on 32-bit target */
431 if (addr >= UINTPTR_MAX)
435 /* align the addr on 16M boundary, 16MB is the minimum huge page
436 * size on IBM Power architecture. If the addr is aligned to 16MB,
437 * it can align to 2MB for x86. So this alignment can also be used
439 internal_config.base_virtaddr =
440 RTE_PTR_ALIGN_CEIL((uintptr_t)addr, (size_t)RTE_PGSIZE_16M);
446 eal_parse_vfio_intr(const char *mode)
451 enum rte_intr_mode value;
453 { "legacy", RTE_INTR_MODE_LEGACY },
454 { "msi", RTE_INTR_MODE_MSI },
455 { "msix", RTE_INTR_MODE_MSIX },
458 for (i = 0; i < RTE_DIM(map); i++) {
459 if (!strcmp(mode, map[i].name)) {
460 internal_config.vfio_intr_mode = map[i].value;
468 eal_get_hugepage_mem_size(void)
473 for (i = 0; i < internal_config.num_hugepage_sizes; i++) {
474 struct hugepage_info *hpi = &internal_config.hugepage_info[i];
475 if (hpi->hugedir != NULL) {
476 for (j = 0; j < RTE_MAX_NUMA_NODES; j++) {
477 size += hpi->hugepage_sz * hpi->num_pages[j];
482 return (size < SIZE_MAX) ? (size_t)(size) : SIZE_MAX;
485 /* Parse the arguments for --log-level only */
487 eal_log_level_parse(int argc, char **argv)
492 const int old_optind = optind;
493 const int old_optopt = optopt;
494 char * const old_optarg = optarg;
499 eal_reset_internal_config(&internal_config);
501 while ((opt = getopt_long(argc, argvopt, eal_short_options,
502 eal_long_options, &option_index)) != EOF) {
506 /* getopt is not happy, stop right now */
510 ret = (opt == OPT_LOG_LEVEL_NUM) ?
511 eal_parse_common_option(opt, optarg, &internal_config) : 0;
513 /* common parser is not happy */
518 /* restore getopt lib */
524 /* Parse the argument given in the command line of the application */
526 eal_parse_args(int argc, char **argv)
531 char *prgname = argv[0];
532 const int old_optind = optind;
533 const int old_optopt = optopt;
534 char * const old_optarg = optarg;
539 while ((opt = getopt_long(argc, argvopt, eal_short_options,
540 eal_long_options, &option_index)) != EOF) {
542 /* getopt is not happy, stop right now */
549 ret = eal_parse_common_option(opt, optarg, &internal_config);
550 /* common parser is not happy */
556 /* common parser handled this option */
566 case OPT_XEN_DOM0_NUM:
567 #ifdef RTE_LIBRTE_XEN_DOM0
568 internal_config.xen_dom0_support = 1;
570 RTE_LOG(ERR, EAL, "Can't support DPDK app "
571 "running on Dom0, please configure"
572 " RTE_LIBRTE_XEN_DOM0=y\n");
578 case OPT_HUGE_DIR_NUM:
579 internal_config.hugepage_dir = optarg;
582 case OPT_FILE_PREFIX_NUM:
583 internal_config.hugefile_prefix = optarg;
586 case OPT_SOCKET_MEM_NUM:
587 if (eal_parse_socket_mem(optarg) < 0) {
588 RTE_LOG(ERR, EAL, "invalid parameters for --"
589 OPT_SOCKET_MEM "\n");
596 case OPT_BASE_VIRTADDR_NUM:
597 if (eal_parse_base_virtaddr(optarg) < 0) {
598 RTE_LOG(ERR, EAL, "invalid parameter for --"
599 OPT_BASE_VIRTADDR "\n");
606 case OPT_VFIO_INTR_NUM:
607 if (eal_parse_vfio_intr(optarg) < 0) {
608 RTE_LOG(ERR, EAL, "invalid parameters for --"
616 case OPT_CREATE_UIO_DEV_NUM:
617 internal_config.create_uio_dev = 1;
621 if (opt < OPT_LONG_MIN_NUM && isprint(opt)) {
622 RTE_LOG(ERR, EAL, "Option %c is not supported "
624 } else if (opt >= OPT_LONG_MIN_NUM &&
625 opt < OPT_LONG_MAX_NUM) {
626 RTE_LOG(ERR, EAL, "Option %s is not supported "
628 eal_long_options[option_index].name);
630 RTE_LOG(ERR, EAL, "Option %d is not supported "
639 if (eal_adjust_config(&internal_config) != 0) {
645 if (eal_check_common_options(&internal_config) != 0) {
651 /* --xen-dom0 doesn't make sense with --socket-mem */
652 if (internal_config.xen_dom0_support && internal_config.force_sockets == 1) {
653 RTE_LOG(ERR, EAL, "Options --"OPT_SOCKET_MEM" cannot be specified "
654 "together with --"OPT_XEN_DOM0"\n");
661 argv[optind-1] = prgname;
665 /* restore getopt lib */
674 eal_check_mem_on_local_socket(void)
676 const struct rte_memseg *ms;
679 socket_id = rte_lcore_to_socket_id(rte_config.master_lcore);
681 ms = rte_eal_get_physmem_layout();
683 for (i = 0; i < RTE_MAX_MEMSEG; i++)
684 if (ms[i].socket_id == socket_id &&
688 RTE_LOG(WARNING, EAL, "WARNING: Master core has no "
689 "memory on local socket!\n");
693 sync_func(__attribute__((unused)) void *arg)
699 rte_eal_mcfg_complete(void)
701 /* ALL shared mem_config related INIT DONE */
702 if (rte_config.process_type == RTE_PROC_PRIMARY)
703 rte_config.mem_config->magic = RTE_MAGIC;
707 * Request iopl privilege for all RPL, returns 0 on success
708 * iopl() call is mostly for the i386 architecture. For other architectures,
709 * return -1 to indicate IO privilege can't be changed in this way.
712 rte_eal_iopl_init(void)
714 #if defined(RTE_ARCH_X86_64) || defined(RTE_ARCH_I686)
723 /* Launch threads, called at application init(). */
725 rte_eal_init(int argc, char **argv)
729 static rte_atomic32_t run_once = RTE_ATOMIC32_INIT(0);
731 char cpuset[RTE_CPU_AFFINITY_STR_LEN];
732 char thread_name[RTE_MAX_THREAD_NAME_LEN];
734 if (!rte_atomic32_test_and_set(&run_once))
737 logid = strrchr(argv[0], '/');
738 logid = strdup(logid ? logid + 1: argv[0]);
740 thread_id = pthread_self();
742 if (rte_eal_log_early_init() < 0)
743 rte_panic("Cannot init early logs\n");
745 eal_log_level_parse(argc, argv);
747 /* set log level as early as possible */
748 rte_set_log_level(internal_config.log_level);
750 if (rte_eal_cpu_init() < 0)
751 rte_panic("Cannot detect lcores\n");
753 fctret = eal_parse_args(argc, argv);
757 if (internal_config.no_hugetlbfs == 0 &&
758 internal_config.process_type != RTE_PROC_SECONDARY &&
759 internal_config.xen_dom0_support == 0 &&
760 eal_hugepage_info_init() < 0)
761 rte_panic("Cannot get hugepage information\n");
763 if (internal_config.memory == 0 && internal_config.force_sockets == 0) {
764 if (internal_config.no_hugetlbfs)
765 internal_config.memory = MEMSIZE_IF_NO_HUGE_PAGE;
767 internal_config.memory = eal_get_hugepage_mem_size();
770 if (internal_config.vmware_tsc_map == 1) {
771 #ifdef RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT
772 rte_cycles_vmware_tsc_map = 1;
773 RTE_LOG (DEBUG, EAL, "Using VMWARE TSC MAP, "
774 "you must have monitor_control.pseudo_perfctr = TRUE\n");
776 RTE_LOG (WARNING, EAL, "Ignoring --vmware-tsc-map because "
777 "RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT is not set\n");
781 rte_srand(rte_rdtsc());
785 if (rte_eal_pci_init() < 0)
786 rte_panic("Cannot init PCI\n");
788 #ifdef RTE_LIBRTE_IVSHMEM
789 if (rte_eal_ivshmem_init() < 0)
790 rte_panic("Cannot init IVSHMEM\n");
793 if (rte_eal_memory_init() < 0)
794 rte_panic("Cannot init memory\n");
796 /* the directories are locked during eal_hugepage_info_init */
797 eal_hugedirs_unlock();
799 if (rte_eal_memzone_init() < 0)
800 rte_panic("Cannot init memzone\n");
802 if (rte_eal_tailqs_init() < 0)
803 rte_panic("Cannot init tail queues for objects\n");
805 #ifdef RTE_LIBRTE_IVSHMEM
806 if (rte_eal_ivshmem_obj_init() < 0)
807 rte_panic("Cannot init IVSHMEM objects\n");
810 if (rte_eal_log_init(logid, internal_config.syslog_facility) < 0)
811 rte_panic("Cannot init logs\n");
813 if (rte_eal_alarm_init() < 0)
814 rte_panic("Cannot init interrupt-handling thread\n");
816 if (rte_eal_timer_init() < 0)
817 rte_panic("Cannot init HPET or TSC timers\n");
819 eal_check_mem_on_local_socket();
821 rte_eal_mcfg_complete();
823 if (eal_plugins_init() < 0)
824 rte_panic("Cannot init plugins\n");
826 eal_thread_init_master(rte_config.master_lcore);
828 ret = eal_thread_dump_affinity(cpuset, RTE_CPU_AFFINITY_STR_LEN);
830 RTE_LOG(DEBUG, EAL, "Master lcore %u is ready (tid=%x;cpuset=[%s%s])\n",
831 rte_config.master_lcore, (int)thread_id, cpuset,
832 ret == 0 ? "" : "...");
834 if (rte_eal_dev_init() < 0)
835 rte_panic("Cannot init pmd devices\n");
837 if (rte_eal_intr_init() < 0)
838 rte_panic("Cannot init interrupt-handling thread\n");
840 RTE_LCORE_FOREACH_SLAVE(i) {
843 * create communication pipes between master thread
846 if (pipe(lcore_config[i].pipe_master2slave) < 0)
847 rte_panic("Cannot create pipe\n");
848 if (pipe(lcore_config[i].pipe_slave2master) < 0)
849 rte_panic("Cannot create pipe\n");
851 lcore_config[i].state = WAIT;
853 /* create a thread for each lcore */
854 ret = pthread_create(&lcore_config[i].thread_id, NULL,
855 eal_thread_loop, NULL);
857 rte_panic("Cannot create thread\n");
859 /* Set thread_name for aid in debugging. */
860 snprintf(thread_name, RTE_MAX_THREAD_NAME_LEN,
861 "lcore-slave-%d", i);
862 ret = pthread_setname_np(lcore_config[i].thread_id,
866 "Cannot set name for lcore thread\n");
870 * Launch a dummy function on all slave lcores, so that master lcore
871 * knows they are all ready when this function returns.
873 rte_eal_mp_remote_launch(sync_func, NULL, SKIP_MASTER);
874 rte_eal_mp_wait_lcore();
876 /* Probe & Initialize PCI devices */
877 if (rte_eal_pci_probe())
878 rte_panic("Cannot probe PCI\n");
884 enum rte_lcore_role_t
885 rte_eal_lcore_role(unsigned lcore_id)
887 return rte_config.lcore_role[lcore_id];
891 rte_eal_process_type(void)
893 return rte_config.process_type;
896 int rte_eal_has_hugepages(void)
898 return ! internal_config.no_hugetlbfs;
902 rte_eal_check_module(const char *module_name)
904 char mod_name[30]; /* Any module names can be longer than 30 bytes? */
908 if (NULL == module_name)
911 FILE *fd = fopen("/proc/modules", "r");
913 RTE_LOG(ERR, EAL, "Open /proc/modules failed!"
914 " error %i (%s)\n", errno, strerror(errno));
918 n = fscanf(fd, "%29s %*[^\n]", mod_name);
919 if ((n == 1) && !strcmp(mod_name, module_name)) {