4 * Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
5 * Copyright(c) 2012-2014 6WIND S.A.
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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_memzone.h>
60 #include <rte_launch.h>
62 #include <rte_eal_memconfig.h>
63 #include <rte_errno.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>
75 #include <rte_devargs.h>
76 #include <rte_version.h>
77 #include <rte_atomic.h>
78 #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 a pointer to the configuration structure */
125 rte_eal_get_configuration(void)
130 /* parse a sysfs (or other) file containing one integer value */
132 eal_parse_sysfs_value(const char *filename, unsigned long *val)
138 if ((f = fopen(filename, "r")) == NULL) {
139 RTE_LOG(ERR, EAL, "%s(): cannot open sysfs value %s\n",
144 if (fgets(buf, sizeof(buf), f) == NULL) {
145 RTE_LOG(ERR, EAL, "%s(): cannot read sysfs value %s\n",
150 *val = strtoul(buf, &end, 0);
151 if ((buf[0] == '\0') || (end == NULL) || (*end != '\n')) {
152 RTE_LOG(ERR, EAL, "%s(): cannot parse sysfs value %s\n",
162 /* create memory configuration in shared/mmap memory. Take out
163 * a write lock on the memsegs, so we can auto-detect primary/secondary.
164 * This means we never close the file while running (auto-close on exit).
165 * We also don't lock the whole file, so that in future we can use read-locks
166 * on other parts, e.g. memzones, to detect if there are running secondary
169 rte_eal_config_create(void)
171 void *rte_mem_cfg_addr;
174 const char *pathname = eal_runtime_config_path();
176 if (internal_config.no_shconf)
179 /* map the config before hugepage address so that we don't waste a page */
180 if (internal_config.base_virtaddr != 0)
181 rte_mem_cfg_addr = (void *)
182 RTE_ALIGN_FLOOR(internal_config.base_virtaddr -
183 sizeof(struct rte_mem_config), sysconf(_SC_PAGE_SIZE));
185 rte_mem_cfg_addr = NULL;
188 mem_cfg_fd = open(pathname, O_RDWR | O_CREAT, 0660);
190 rte_panic("Cannot open '%s' for rte_mem_config\n", pathname);
193 retval = ftruncate(mem_cfg_fd, sizeof(*rte_config.mem_config));
196 rte_panic("Cannot resize '%s' for rte_mem_config\n", pathname);
199 retval = fcntl(mem_cfg_fd, F_SETLK, &wr_lock);
202 rte_exit(EXIT_FAILURE, "Cannot create lock on '%s'. Is another primary "
203 "process running?\n", pathname);
206 rte_mem_cfg_addr = mmap(rte_mem_cfg_addr, sizeof(*rte_config.mem_config),
207 PROT_READ | PROT_WRITE, MAP_SHARED, mem_cfg_fd, 0);
209 if (rte_mem_cfg_addr == MAP_FAILED){
210 rte_panic("Cannot mmap memory for rte_config\n");
212 memcpy(rte_mem_cfg_addr, &early_mem_config, sizeof(early_mem_config));
213 rte_config.mem_config = rte_mem_cfg_addr;
215 /* store address of the config in the config itself so that secondary
216 * processes could later map the config into this exact location */
217 rte_config.mem_config->mem_cfg_addr = (uintptr_t) rte_mem_cfg_addr;
221 /* attach to an existing shared memory config */
223 rte_eal_config_attach(void)
225 struct rte_mem_config *mem_config;
227 const char *pathname = eal_runtime_config_path();
229 if (internal_config.no_shconf)
233 mem_cfg_fd = open(pathname, O_RDWR);
235 rte_panic("Cannot open '%s' for rte_mem_config\n", pathname);
238 /* map it as read-only first */
239 mem_config = (struct rte_mem_config *) mmap(NULL, sizeof(*mem_config),
240 PROT_READ, MAP_SHARED, mem_cfg_fd, 0);
241 if (mem_config == MAP_FAILED)
242 rte_panic("Cannot mmap memory for rte_config! error %i (%s)\n",
243 errno, strerror(errno));
245 rte_config.mem_config = mem_config;
248 /* reattach the shared config at exact memory location primary process has it */
250 rte_eal_config_reattach(void)
252 struct rte_mem_config *mem_config;
253 void *rte_mem_cfg_addr;
255 if (internal_config.no_shconf)
258 /* save the address primary process has mapped shared config to */
259 rte_mem_cfg_addr = (void *) (uintptr_t) rte_config.mem_config->mem_cfg_addr;
261 /* unmap original config */
262 munmap(rte_config.mem_config, sizeof(struct rte_mem_config));
264 /* remap the config at proper address */
265 mem_config = (struct rte_mem_config *) mmap(rte_mem_cfg_addr,
266 sizeof(*mem_config), PROT_READ | PROT_WRITE, MAP_SHARED,
268 if (mem_config == MAP_FAILED || mem_config != rte_mem_cfg_addr) {
269 if (mem_config != MAP_FAILED)
270 /* errno is stale, don't use */
271 rte_panic("Cannot mmap memory for rte_config at [%p], got [%p]"
272 " - please use '--base-virtaddr' option\n",
273 rte_mem_cfg_addr, mem_config);
275 rte_panic("Cannot mmap memory for rte_config! error %i (%s)\n",
276 errno, strerror(errno));
280 rte_config.mem_config = mem_config;
283 /* Detect if we are a primary or a secondary process */
285 eal_proc_type_detect(void)
287 enum rte_proc_type_t ptype = RTE_PROC_PRIMARY;
288 const char *pathname = eal_runtime_config_path();
290 /* if we can open the file but not get a write-lock we are a secondary
291 * process. NOTE: if we get a file handle back, we keep that open
292 * and don't close it to prevent a race condition between multiple opens */
293 if (((mem_cfg_fd = open(pathname, O_RDWR)) >= 0) &&
294 (fcntl(mem_cfg_fd, F_SETLK, &wr_lock) < 0))
295 ptype = RTE_PROC_SECONDARY;
297 RTE_LOG(INFO, EAL, "Auto-detected process type: %s\n",
298 ptype == RTE_PROC_PRIMARY ? "PRIMARY" : "SECONDARY");
303 /* Sets up rte_config structure with the pointer to shared memory config.*/
305 rte_config_init(void)
307 rte_config.process_type = internal_config.process_type;
309 switch (rte_config.process_type){
310 case RTE_PROC_PRIMARY:
311 rte_eal_config_create();
313 case RTE_PROC_SECONDARY:
314 rte_eal_config_attach();
315 rte_eal_mcfg_wait_complete(rte_config.mem_config);
316 rte_eal_config_reattach();
319 case RTE_PROC_INVALID:
320 rte_panic("Invalid process type\n");
324 /* Unlocks hugepage directories that were locked by eal_hugepage_info_init */
326 eal_hugedirs_unlock(void)
330 for (i = 0; i < MAX_HUGEPAGE_SIZES; i++)
332 /* skip uninitialized */
333 if (internal_config.hugepage_info[i].lock_descriptor < 0)
335 /* unlock hugepage file */
336 flock(internal_config.hugepage_info[i].lock_descriptor, LOCK_UN);
337 close(internal_config.hugepage_info[i].lock_descriptor);
338 /* reset the field */
339 internal_config.hugepage_info[i].lock_descriptor = -1;
345 eal_usage(const char *prgname)
347 printf("\nUsage: %s ", prgname);
349 printf("EAL Linux options:\n"
350 " --"OPT_SOCKET_MEM" Memory to allocate on sockets (comma separated values)\n"
351 " --"OPT_HUGE_DIR" Directory where hugetlbfs is mounted\n"
352 " --"OPT_FILE_PREFIX" Prefix for hugepage filenames\n"
353 " --"OPT_BASE_VIRTADDR" Base virtual address\n"
354 " --"OPT_CREATE_UIO_DEV" Create /dev/uioX (usually done by hotplug)\n"
355 " --"OPT_VFIO_INTR" Interrupt mode for VFIO (legacy|msi|msix)\n"
356 " --"OPT_XEN_DOM0" Support running on Xen dom0 without hugetlbfs\n"
358 /* Allow the application to print its usage message too if hook is set */
359 if ( rte_application_usage_hook ) {
360 printf("===== Application Usage =====\n\n");
361 rte_application_usage_hook(prgname);
365 /* Set a per-application usage message */
367 rte_set_application_usage_hook( rte_usage_hook_t usage_func )
369 rte_usage_hook_t old_func;
371 /* Will be NULL on the first call to denote the last usage routine. */
372 old_func = rte_application_usage_hook;
373 rte_application_usage_hook = usage_func;
379 eal_parse_socket_mem(char *socket_mem)
381 char * arg[RTE_MAX_NUMA_NODES];
384 uint64_t total_mem = 0;
386 len = strnlen(socket_mem, SOCKET_MEM_STRLEN);
387 if (len == SOCKET_MEM_STRLEN) {
388 RTE_LOG(ERR, EAL, "--socket-mem is too long\n");
392 /* all other error cases will be caught later */
393 if (!isdigit(socket_mem[len-1]))
396 /* split the optarg into separate socket values */
397 arg_num = rte_strsplit(socket_mem, len,
398 arg, RTE_MAX_NUMA_NODES, ',');
400 /* if split failed, or 0 arguments */
404 internal_config.force_sockets = 1;
406 /* parse each defined socket option */
408 for (i = 0; i < arg_num; i++) {
410 internal_config.socket_mem[i] = strtoull(arg[i], &end, 10);
412 /* check for invalid input */
414 (arg[i][0] == '\0') || (end == NULL) || (*end != '\0'))
416 internal_config.socket_mem[i] *= 1024ULL;
417 internal_config.socket_mem[i] *= 1024ULL;
418 total_mem += internal_config.socket_mem[i];
421 /* check if we have a positive amount of total memory */
429 eal_parse_base_virtaddr(const char *arg)
435 addr = strtoull(arg, &end, 16);
437 /* check for errors */
438 if ((errno != 0) || (arg[0] == '\0') || end == NULL || (*end != '\0'))
441 /* make sure we don't exceed 32-bit boundary on 32-bit target */
443 if (addr >= UINTPTR_MAX)
447 /* align the addr on 16M boundary, 16MB is the minimum huge page
448 * size on IBM Power architecture. If the addr is aligned to 16MB,
449 * it can align to 2MB for x86. So this alignment can also be used
451 internal_config.base_virtaddr =
452 RTE_PTR_ALIGN_CEIL((uintptr_t)addr, (size_t)RTE_PGSIZE_16M);
458 eal_parse_vfio_intr(const char *mode)
463 enum rte_intr_mode value;
465 { "legacy", RTE_INTR_MODE_LEGACY },
466 { "msi", RTE_INTR_MODE_MSI },
467 { "msix", RTE_INTR_MODE_MSIX },
470 for (i = 0; i < RTE_DIM(map); i++) {
471 if (!strcmp(mode, map[i].name)) {
472 internal_config.vfio_intr_mode = map[i].value;
479 /* Parse the arguments for --log-level only */
481 eal_log_level_parse(int argc, char **argv)
486 const int old_optind = optind;
487 const int old_optopt = optopt;
488 char * const old_optarg = optarg;
493 while ((opt = getopt_long(argc, argvopt, eal_short_options,
494 eal_long_options, &option_index)) != EOF) {
498 /* getopt is not happy, stop right now */
502 ret = (opt == OPT_LOG_LEVEL_NUM) ?
503 eal_parse_common_option(opt, optarg, &internal_config) : 0;
505 /* common parser is not happy */
510 /* restore getopt lib */
516 /* Parse the argument given in the command line of the application */
518 eal_parse_args(int argc, char **argv)
523 char *prgname = argv[0];
524 const int old_optind = optind;
525 const int old_optopt = optopt;
526 char * const old_optarg = optarg;
531 while ((opt = getopt_long(argc, argvopt, eal_short_options,
532 eal_long_options, &option_index)) != EOF) {
534 /* getopt is not happy, stop right now */
541 ret = eal_parse_common_option(opt, optarg, &internal_config);
542 /* common parser is not happy */
548 /* common parser handled this option */
558 case OPT_XEN_DOM0_NUM:
559 #ifdef RTE_LIBRTE_XEN_DOM0
560 internal_config.xen_dom0_support = 1;
562 RTE_LOG(ERR, EAL, "Can't support DPDK app "
563 "running on Dom0, please configure"
564 " RTE_LIBRTE_XEN_DOM0=y\n");
570 case OPT_HUGE_DIR_NUM:
571 internal_config.hugepage_dir = optarg;
574 case OPT_FILE_PREFIX_NUM:
575 internal_config.hugefile_prefix = optarg;
578 case OPT_SOCKET_MEM_NUM:
579 if (eal_parse_socket_mem(optarg) < 0) {
580 RTE_LOG(ERR, EAL, "invalid parameters for --"
581 OPT_SOCKET_MEM "\n");
588 case OPT_BASE_VIRTADDR_NUM:
589 if (eal_parse_base_virtaddr(optarg) < 0) {
590 RTE_LOG(ERR, EAL, "invalid parameter for --"
591 OPT_BASE_VIRTADDR "\n");
598 case OPT_VFIO_INTR_NUM:
599 if (eal_parse_vfio_intr(optarg) < 0) {
600 RTE_LOG(ERR, EAL, "invalid parameters for --"
608 case OPT_CREATE_UIO_DEV_NUM:
609 internal_config.create_uio_dev = 1;
613 if (opt < OPT_LONG_MIN_NUM && isprint(opt)) {
614 RTE_LOG(ERR, EAL, "Option %c is not supported "
616 } else if (opt >= OPT_LONG_MIN_NUM &&
617 opt < OPT_LONG_MAX_NUM) {
618 RTE_LOG(ERR, EAL, "Option %s is not supported "
620 eal_long_options[option_index].name);
622 RTE_LOG(ERR, EAL, "Option %d is not supported "
631 if (eal_adjust_config(&internal_config) != 0) {
637 if (eal_check_common_options(&internal_config) != 0) {
643 /* --xen-dom0 doesn't make sense with --socket-mem */
644 if (internal_config.xen_dom0_support && internal_config.force_sockets == 1) {
645 RTE_LOG(ERR, EAL, "Options --"OPT_SOCKET_MEM" cannot be specified "
646 "together with --"OPT_XEN_DOM0"\n");
653 argv[optind-1] = prgname;
657 /* restore getopt lib */
666 eal_check_mem_on_local_socket(void)
668 const struct rte_memseg *ms;
671 socket_id = rte_lcore_to_socket_id(rte_config.master_lcore);
673 ms = rte_eal_get_physmem_layout();
675 for (i = 0; i < RTE_MAX_MEMSEG; i++)
676 if (ms[i].socket_id == socket_id &&
680 RTE_LOG(WARNING, EAL, "WARNING: Master core has no "
681 "memory on local socket!\n");
685 sync_func(__attribute__((unused)) void *arg)
691 rte_eal_mcfg_complete(void)
693 /* ALL shared mem_config related INIT DONE */
694 if (rte_config.process_type == RTE_PROC_PRIMARY)
695 rte_config.mem_config->magic = RTE_MAGIC;
699 * Request iopl privilege for all RPL, returns 0 on success
700 * iopl() call is mostly for the i386 architecture. For other architectures,
701 * return -1 to indicate IO privilege can't be changed in this way.
704 rte_eal_iopl_init(void)
706 #if defined(RTE_ARCH_X86)
714 static int rte_eal_vfio_setup(void)
716 int vfio_enabled = 0;
718 if (!internal_config.no_pci) {
720 vfio_enabled |= pci_vfio_is_enabled();
725 /* if we are primary process, create a thread to communicate with
726 * secondary processes. the thread will use a socket to wait for
727 * requests from secondary process to send open file descriptors,
728 * because VFIO does not allow multiple open descriptors on a group or
731 if (internal_config.process_type == RTE_PROC_PRIMARY &&
732 vfio_mp_sync_setup() < 0)
740 static void rte_eal_init_alert(const char *msg)
742 fprintf(stderr, "EAL: FATAL: %s\n", msg);
743 RTE_LOG(ERR, EAL, "%s\n", msg);
746 /* Launch threads, called at application init(). */
748 rte_eal_init(int argc, char **argv)
752 static rte_atomic32_t run_once = RTE_ATOMIC32_INIT(0);
754 char cpuset[RTE_CPU_AFFINITY_STR_LEN];
755 char thread_name[RTE_MAX_THREAD_NAME_LEN];
757 /* checks if the machine is adequate */
758 if (!rte_cpu_is_supported()) {
759 rte_eal_init_alert("unsupported cpu type.");
764 if (!rte_atomic32_test_and_set(&run_once)) {
765 rte_eal_init_alert("already called initialization.");
766 rte_errno = EALREADY;
770 logid = strrchr(argv[0], '/');
771 logid = strdup(logid ? logid + 1: argv[0]);
773 thread_id = pthread_self();
775 eal_reset_internal_config(&internal_config);
777 /* set log level as early as possible */
778 eal_log_level_parse(argc, argv);
780 if (rte_eal_cpu_init() < 0) {
781 rte_eal_init_alert("Cannot detect lcores.");
786 fctret = eal_parse_args(argc, argv);
788 rte_eal_init_alert("Invalid 'command line' arguments.");
790 rte_atomic32_clear(&run_once);
794 if (internal_config.no_hugetlbfs == 0 &&
795 internal_config.process_type != RTE_PROC_SECONDARY &&
796 internal_config.xen_dom0_support == 0 &&
797 eal_hugepage_info_init() < 0) {
798 rte_eal_init_alert("Cannot get hugepage information.");
800 rte_atomic32_clear(&run_once);
804 if (internal_config.memory == 0 && internal_config.force_sockets == 0) {
805 if (internal_config.no_hugetlbfs)
806 internal_config.memory = MEMSIZE_IF_NO_HUGE_PAGE;
809 if (internal_config.vmware_tsc_map == 1) {
810 #ifdef RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT
811 rte_cycles_vmware_tsc_map = 1;
812 RTE_LOG (DEBUG, EAL, "Using VMWARE TSC MAP, "
813 "you must have monitor_control.pseudo_perfctr = TRUE\n");
815 RTE_LOG (WARNING, EAL, "Ignoring --vmware-tsc-map because "
816 "RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT is not set\n");
820 rte_srand(rte_rdtsc());
824 if (rte_eal_log_init(logid, internal_config.syslog_facility) < 0) {
825 rte_eal_init_alert("Cannot init logging.");
827 rte_atomic32_clear(&run_once);
832 if (rte_eal_vfio_setup() < 0) {
833 rte_eal_init_alert("Cannot init VFIO\n");
835 rte_atomic32_clear(&run_once);
840 if (rte_eal_memory_init() < 0) {
841 rte_eal_init_alert("Cannot init memory\n");
846 /* the directories are locked during eal_hugepage_info_init */
847 eal_hugedirs_unlock();
849 if (rte_eal_memzone_init() < 0) {
850 rte_eal_init_alert("Cannot init memzone\n");
855 if (rte_eal_tailqs_init() < 0) {
856 rte_eal_init_alert("Cannot init tail queues for objects\n");
861 if (rte_eal_alarm_init() < 0) {
862 rte_eal_init_alert("Cannot init interrupt-handling thread\n");
863 /* rte_eal_alarm_init sets rte_errno on failure. */
867 if (rte_eal_timer_init() < 0) {
868 rte_eal_init_alert("Cannot init HPET or TSC timers\n");
873 eal_check_mem_on_local_socket();
875 if (eal_plugins_init() < 0)
876 rte_eal_init_alert("Cannot init plugins\n");
878 eal_thread_init_master(rte_config.master_lcore);
880 ret = eal_thread_dump_affinity(cpuset, RTE_CPU_AFFINITY_STR_LEN);
882 RTE_LOG(DEBUG, EAL, "Master lcore %u is ready (tid=%x;cpuset=[%s%s])\n",
883 rte_config.master_lcore, (int)thread_id, cpuset,
884 ret == 0 ? "" : "...");
886 if (rte_eal_intr_init() < 0) {
887 rte_eal_init_alert("Cannot init interrupt-handling thread\n");
891 if (rte_bus_scan()) {
892 rte_eal_init_alert("Cannot scan the buses for devices\n");
897 RTE_LCORE_FOREACH_SLAVE(i) {
900 * create communication pipes between master thread
903 if (pipe(lcore_config[i].pipe_master2slave) < 0)
904 rte_panic("Cannot create pipe\n");
905 if (pipe(lcore_config[i].pipe_slave2master) < 0)
906 rte_panic("Cannot create pipe\n");
908 lcore_config[i].state = WAIT;
910 /* create a thread for each lcore */
911 ret = pthread_create(&lcore_config[i].thread_id, NULL,
912 eal_thread_loop, NULL);
914 rte_panic("Cannot create thread\n");
916 /* Set thread_name for aid in debugging. */
917 snprintf(thread_name, RTE_MAX_THREAD_NAME_LEN,
918 "lcore-slave-%d", i);
919 ret = rte_thread_setname(lcore_config[i].thread_id,
923 "Cannot set name for lcore thread\n");
927 * Launch a dummy function on all slave lcores, so that master lcore
928 * knows they are all ready when this function returns.
930 rte_eal_mp_remote_launch(sync_func, NULL, SKIP_MASTER);
931 rte_eal_mp_wait_lcore();
933 /* Probe all the buses and devices/drivers on them */
934 if (rte_bus_probe()) {
935 rte_eal_init_alert("Cannot probe devices\n");
940 rte_eal_mcfg_complete();
946 enum rte_lcore_role_t
947 rte_eal_lcore_role(unsigned lcore_id)
949 return rte_config.lcore_role[lcore_id];
953 rte_eal_process_type(void)
955 return rte_config.process_type;
958 int rte_eal_has_hugepages(void)
960 return ! internal_config.no_hugetlbfs;
964 rte_eal_check_module(const char *module_name)
966 char sysfs_mod_name[PATH_MAX];
970 if (NULL == module_name)
973 /* Check if there is sysfs mounted */
974 if (stat("/sys/module", &st) != 0) {
975 RTE_LOG(DEBUG, EAL, "sysfs is not mounted! error %i (%s)\n",
976 errno, strerror(errno));
980 /* A module might be built-in, therefore try sysfs */
981 n = snprintf(sysfs_mod_name, PATH_MAX, "/sys/module/%s", module_name);
982 if (n < 0 || n > PATH_MAX) {
983 RTE_LOG(DEBUG, EAL, "Could not format module path\n");
987 if (stat(sysfs_mod_name, &st) != 0) {
988 RTE_LOG(DEBUG, EAL, "Module %s not found! error %i (%s)\n",
989 sysfs_mod_name, errno, strerror(errno));
993 /* Module has been found */