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eal.c
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eal.c
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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2010-2018 Intel Corporation.
* Copyright(c) 2012-2014 6WIND S.A.
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <stdarg.h>
#include <unistd.h>
#include <pthread.h>
#include <syslog.h>
#include <getopt.h>
#include <sys/file.h>
#include <dirent.h>
#include <fcntl.h>
#include <fnmatch.h>
#include <stddef.h>
#include <errno.h>
#include <limits.h>
#include <sys/mman.h>
#include <sys/queue.h>
#include <sys/stat.h>
#if defined(RTE_ARCH_X86)
#include <sys/io.h>
#endif
#include <linux/version.h>
#include <rte_compat.h>
#include <rte_common.h>
#include <rte_debug.h>
#include <rte_memory.h>
#include <rte_launch.h>
#include <rte_eal.h>
#include <rte_errno.h>
#include <rte_per_lcore.h>
#include <rte_lcore.h>
#include <rte_service_component.h>
#include <rte_log.h>
#include <rte_random.h>
#include <rte_cycles.h>
#include <rte_string_fns.h>
#include <rte_cpuflags.h>
#include <rte_interrupts.h>
#include <rte_bus.h>
#include <rte_dev.h>
#include <rte_devargs.h>
#include <rte_version.h>
#include <malloc_heap.h>
#include <rte_vfio.h>
#include <telemetry_internal.h>
#include "eal_private.h"
#include "eal_thread.h"
#include "eal_internal_cfg.h"
#include "eal_filesystem.h"
#include "eal_hugepages.h"
#include "eal_memcfg.h"
#include "eal_trace.h"
#include "eal_log.h"
#include "eal_options.h"
#include "eal_vfio.h"
#include "hotplug_mp.h"
#define MEMSIZE_IF_NO_HUGE_PAGE (64ULL * 1024ULL * 1024ULL)
#define SOCKET_MEM_STRLEN (RTE_MAX_NUMA_NODES * 10)
#define KERNEL_IOMMU_GROUPS_PATH "/sys/kernel/iommu_groups"
/* define fd variable here, because file needs to be kept open for the
* duration of the program, as we hold a write lock on it in the primary proc */
static int mem_cfg_fd = -1;
static struct flock wr_lock = {
.l_type = F_WRLCK,
.l_whence = SEEK_SET,
.l_start = offsetof(struct rte_mem_config, memsegs),
.l_len = RTE_SIZEOF_FIELD(struct rte_mem_config, memsegs),
};
/* internal configuration (per-core) */
struct lcore_config lcore_config[RTE_MAX_LCORE];
/* used by rte_rdtsc() */
int rte_cycles_vmware_tsc_map;
static const char *default_runtime_dir = "/var/run";
int
eal_create_runtime_dir(void)
{
const char *directory = default_runtime_dir;
const char *xdg_runtime_dir = getenv("XDG_RUNTIME_DIR");
const char *fallback = "/tmp";
char run_dir[PATH_MAX];
char tmp[PATH_MAX];
int ret;
if (getuid() != 0) {
/* try XDG path first, fall back to /tmp */
if (xdg_runtime_dir != NULL)
directory = xdg_runtime_dir;
else
directory = fallback;
}
/* create DPDK subdirectory under runtime dir */
ret = snprintf(tmp, sizeof(tmp), "%s/dpdk", directory);
if (ret < 0 || ret == sizeof(tmp)) {
RTE_LOG(ERR, EAL, "Error creating DPDK runtime path name\n");
return -1;
}
/* create prefix-specific subdirectory under DPDK runtime dir */
ret = snprintf(run_dir, sizeof(run_dir), "%s/%s",
tmp, eal_get_hugefile_prefix());
if (ret < 0 || ret == sizeof(run_dir)) {
RTE_LOG(ERR, EAL, "Error creating prefix-specific runtime path name\n");
return -1;
}
/* create the path if it doesn't exist. no "mkdir -p" here, so do it
* step by step.
*/
ret = mkdir(tmp, 0700);
if (ret < 0 && errno != EEXIST) {
RTE_LOG(ERR, EAL, "Error creating '%s': %s\n",
tmp, strerror(errno));
return -1;
}
ret = mkdir(run_dir, 0700);
if (ret < 0 && errno != EEXIST) {
RTE_LOG(ERR, EAL, "Error creating '%s': %s\n",
run_dir, strerror(errno));
return -1;
}
if (eal_set_runtime_dir(run_dir, sizeof(run_dir)))
return -1;
return 0;
}
int
eal_clean_runtime_dir(void)
{
const char *runtime_dir = rte_eal_get_runtime_dir();
DIR *dir;
struct dirent *dirent;
int dir_fd, fd, lck_result;
static const char * const filters[] = {
"fbarray_*",
"mp_socket_*"
};
/* open directory */
dir = opendir(runtime_dir);
if (!dir) {
RTE_LOG(ERR, EAL, "Unable to open runtime directory %s\n",
runtime_dir);
goto error;
}
dir_fd = dirfd(dir);
/* lock the directory before doing anything, to avoid races */
if (flock(dir_fd, LOCK_EX) < 0) {
RTE_LOG(ERR, EAL, "Unable to lock runtime directory %s\n",
runtime_dir);
goto error;
}
dirent = readdir(dir);
if (!dirent) {
RTE_LOG(ERR, EAL, "Unable to read runtime directory %s\n",
runtime_dir);
goto error;
}
while (dirent != NULL) {
unsigned int f_idx;
bool skip = true;
/* skip files that don't match the patterns */
for (f_idx = 0; f_idx < RTE_DIM(filters); f_idx++) {
const char *filter = filters[f_idx];
if (fnmatch(filter, dirent->d_name, 0) == 0) {
skip = false;
break;
}
}
if (skip) {
dirent = readdir(dir);
continue;
}
/* try and lock the file */
fd = openat(dir_fd, dirent->d_name, O_RDONLY);
/* skip to next file */
if (fd == -1) {
dirent = readdir(dir);
continue;
}
/* non-blocking lock */
lck_result = flock(fd, LOCK_EX | LOCK_NB);
/* if lock succeeds, remove the file */
if (lck_result != -1)
unlinkat(dir_fd, dirent->d_name, 0);
close(fd);
dirent = readdir(dir);
}
/* closedir closes dir_fd and drops the lock */
closedir(dir);
return 0;
error:
if (dir)
closedir(dir);
RTE_LOG(ERR, EAL, "Error while clearing runtime dir: %s\n",
strerror(errno));
return -1;
}
/* parse a sysfs (or other) file containing one integer value */
int
eal_parse_sysfs_value(const char *filename, unsigned long *val)
{
FILE *f;
char buf[BUFSIZ];
char *end = NULL;
if ((f = fopen(filename, "r")) == NULL) {
RTE_LOG(ERR, EAL, "%s(): cannot open sysfs value %s\n",
__func__, filename);
return -1;
}
if (fgets(buf, sizeof(buf), f) == NULL) {
RTE_LOG(ERR, EAL, "%s(): cannot read sysfs value %s\n",
__func__, filename);
fclose(f);
return -1;
}
*val = strtoul(buf, &end, 0);
if ((buf[0] == '\0') || (end == NULL) || (*end != '\n')) {
RTE_LOG(ERR, EAL, "%s(): cannot parse sysfs value %s\n",
__func__, filename);
fclose(f);
return -1;
}
fclose(f);
return 0;
}
/* create memory configuration in shared/mmap memory. Take out
* a write lock on the memsegs, so we can auto-detect primary/secondary.
* This means we never close the file while running (auto-close on exit).
* We also don't lock the whole file, so that in future we can use read-locks
* on other parts, e.g. memzones, to detect if there are running secondary
* processes. */
static int
rte_eal_config_create(void)
{
struct rte_config *config = rte_eal_get_configuration();
size_t page_sz = sysconf(_SC_PAGE_SIZE);
size_t cfg_len = sizeof(*config->mem_config);
size_t cfg_len_aligned = RTE_ALIGN(cfg_len, page_sz);
void *rte_mem_cfg_addr, *mapped_mem_cfg_addr;
int retval;
const struct internal_config *internal_conf =
eal_get_internal_configuration();
const char *pathname = eal_runtime_config_path();
if (internal_conf->no_shconf)
return 0;
/* map the config before hugepage address so that we don't waste a page */
if (internal_conf->base_virtaddr != 0)
rte_mem_cfg_addr = (void *)
RTE_ALIGN_FLOOR(internal_conf->base_virtaddr -
sizeof(struct rte_mem_config), page_sz);
else
rte_mem_cfg_addr = NULL;
if (mem_cfg_fd < 0){
mem_cfg_fd = open(pathname, O_RDWR | O_CREAT, 0600);
if (mem_cfg_fd < 0) {
RTE_LOG(ERR, EAL, "Cannot open '%s' for rte_mem_config\n",
pathname);
return -1;
}
}
retval = ftruncate(mem_cfg_fd, cfg_len);
if (retval < 0){
close(mem_cfg_fd);
mem_cfg_fd = -1;
RTE_LOG(ERR, EAL, "Cannot resize '%s' for rte_mem_config\n",
pathname);
return -1;
}
retval = fcntl(mem_cfg_fd, F_SETLK, &wr_lock);
if (retval < 0){
close(mem_cfg_fd);
mem_cfg_fd = -1;
RTE_LOG(ERR, EAL, "Cannot create lock on '%s'. Is another primary "
"process running?\n", pathname);
return -1;
}
/* reserve space for config */
rte_mem_cfg_addr = eal_get_virtual_area(rte_mem_cfg_addr,
&cfg_len_aligned, page_sz, 0, 0);
if (rte_mem_cfg_addr == NULL) {
RTE_LOG(ERR, EAL, "Cannot mmap memory for rte_config\n");
close(mem_cfg_fd);
mem_cfg_fd = -1;
return -1;
}
/* remap the actual file into the space we've just reserved */
mapped_mem_cfg_addr = mmap(rte_mem_cfg_addr,
cfg_len_aligned, PROT_READ | PROT_WRITE,
MAP_SHARED | MAP_FIXED, mem_cfg_fd, 0);
if (mapped_mem_cfg_addr == MAP_FAILED) {
munmap(rte_mem_cfg_addr, cfg_len);
close(mem_cfg_fd);
mem_cfg_fd = -1;
RTE_LOG(ERR, EAL, "Cannot remap memory for rte_config\n");
return -1;
}
memcpy(rte_mem_cfg_addr, config->mem_config, sizeof(struct rte_mem_config));
config->mem_config = rte_mem_cfg_addr;
/* store address of the config in the config itself so that secondary
* processes could later map the config into this exact location
*/
config->mem_config->mem_cfg_addr = (uintptr_t) rte_mem_cfg_addr;
config->mem_config->dma_maskbits = 0;
return 0;
}
/* attach to an existing shared memory config */
static int
rte_eal_config_attach(void)
{
struct rte_config *config = rte_eal_get_configuration();
struct rte_mem_config *mem_config;
const struct internal_config *internal_conf =
eal_get_internal_configuration();
const char *pathname = eal_runtime_config_path();
if (internal_conf->no_shconf)
return 0;
if (mem_cfg_fd < 0){
mem_cfg_fd = open(pathname, O_RDWR);
if (mem_cfg_fd < 0) {
RTE_LOG(ERR, EAL, "Cannot open '%s' for rte_mem_config\n",
pathname);
return -1;
}
}
/* map it as read-only first */
mem_config = (struct rte_mem_config *) mmap(NULL, sizeof(*mem_config),
PROT_READ, MAP_SHARED, mem_cfg_fd, 0);
if (mem_config == MAP_FAILED) {
close(mem_cfg_fd);
mem_cfg_fd = -1;
RTE_LOG(ERR, EAL, "Cannot mmap memory for rte_config! error %i (%s)\n",
errno, strerror(errno));
return -1;
}
config->mem_config = mem_config;
return 0;
}
/* reattach the shared config at exact memory location primary process has it */
static int
rte_eal_config_reattach(void)
{
struct rte_config *config = rte_eal_get_configuration();
struct rte_mem_config *mem_config;
void *rte_mem_cfg_addr;
const struct internal_config *internal_conf =
eal_get_internal_configuration();
if (internal_conf->no_shconf)
return 0;
/* save the address primary process has mapped shared config to */
rte_mem_cfg_addr =
(void *) (uintptr_t) config->mem_config->mem_cfg_addr;
/* unmap original config */
munmap(config->mem_config, sizeof(struct rte_mem_config));
/* remap the config at proper address */
mem_config = (struct rte_mem_config *) mmap(rte_mem_cfg_addr,
sizeof(*mem_config), PROT_READ | PROT_WRITE, MAP_SHARED,
mem_cfg_fd, 0);
close(mem_cfg_fd);
mem_cfg_fd = -1;
if (mem_config == MAP_FAILED || mem_config != rte_mem_cfg_addr) {
if (mem_config != MAP_FAILED) {
/* errno is stale, don't use */
RTE_LOG(ERR, EAL, "Cannot mmap memory for rte_config at [%p], got [%p]"
" - please use '--" OPT_BASE_VIRTADDR
"' option\n", rte_mem_cfg_addr, mem_config);
munmap(mem_config, sizeof(struct rte_mem_config));
return -1;
}
RTE_LOG(ERR, EAL, "Cannot mmap memory for rte_config! error %i (%s)\n",
errno, strerror(errno));
return -1;
}
config->mem_config = mem_config;
return 0;
}
/* Detect if we are a primary or a secondary process */
enum rte_proc_type_t
eal_proc_type_detect(void)
{
enum rte_proc_type_t ptype = RTE_PROC_PRIMARY;
const char *pathname = eal_runtime_config_path();
const struct internal_config *internal_conf =
eal_get_internal_configuration();
/* if there no shared config, there can be no secondary processes */
if (!internal_conf->no_shconf) {
/* if we can open the file but not get a write-lock we are a
* secondary process. NOTE: if we get a file handle back, we
* keep that open and don't close it to prevent a race condition
* between multiple opens.
*/
if (((mem_cfg_fd = open(pathname, O_RDWR)) >= 0) &&
(fcntl(mem_cfg_fd, F_SETLK, &wr_lock) < 0))
ptype = RTE_PROC_SECONDARY;
}
RTE_LOG(INFO, EAL, "Auto-detected process type: %s\n",
ptype == RTE_PROC_PRIMARY ? "PRIMARY" : "SECONDARY");
return ptype;
}
/* Sets up rte_config structure with the pointer to shared memory config.*/
static int
rte_config_init(void)
{
struct rte_config *config = rte_eal_get_configuration();
const struct internal_config *internal_conf =
eal_get_internal_configuration();
config->process_type = internal_conf->process_type;
switch (config->process_type) {
case RTE_PROC_PRIMARY:
if (rte_eal_config_create() < 0)
return -1;
eal_mcfg_update_from_internal();
break;
case RTE_PROC_SECONDARY:
if (rte_eal_config_attach() < 0)
return -1;
eal_mcfg_wait_complete();
if (eal_mcfg_check_version() < 0) {
RTE_LOG(ERR, EAL, "Primary and secondary process DPDK version mismatch\n");
return -1;
}
if (rte_eal_config_reattach() < 0)
return -1;
if (!__rte_mp_enable()) {
RTE_LOG(ERR, EAL, "Primary process refused secondary attachment\n");
return -1;
}
eal_mcfg_update_internal();
break;
case RTE_PROC_AUTO:
case RTE_PROC_INVALID:
RTE_LOG(ERR, EAL, "Invalid process type %d\n",
config->process_type);
return -1;
}
return 0;
}
/* Unlocks hugepage directories that were locked by eal_hugepage_info_init */
static void
eal_hugedirs_unlock(void)
{
int i;
struct internal_config *internal_conf =
eal_get_internal_configuration();
for (i = 0; i < MAX_HUGEPAGE_SIZES; i++)
{
/* skip uninitialized */
if (internal_conf->hugepage_info[i].lock_descriptor < 0)
continue;
/* unlock hugepage file */
flock(internal_conf->hugepage_info[i].lock_descriptor, LOCK_UN);
close(internal_conf->hugepage_info[i].lock_descriptor);
/* reset the field */
internal_conf->hugepage_info[i].lock_descriptor = -1;
}
}
/* display usage */
static void
eal_usage(const char *prgname)
{
rte_usage_hook_t hook = eal_get_application_usage_hook();
printf("\nUsage: %s ", prgname);
eal_common_usage();
printf("EAL Linux options:\n"
" --"OPT_SOCKET_MEM" Memory to allocate on sockets (comma separated values)\n"
" --"OPT_SOCKET_LIMIT" Limit memory allocation on sockets (comma separated values)\n"
" --"OPT_HUGE_DIR" Directory where hugetlbfs is mounted\n"
" --"OPT_FILE_PREFIX" Prefix for hugepage filenames\n"
" --"OPT_CREATE_UIO_DEV" Create /dev/uioX (usually done by hotplug)\n"
" --"OPT_VFIO_INTR" Interrupt mode for VFIO (legacy|msi|msix)\n"
" --"OPT_VFIO_VF_TOKEN" VF token (UUID) shared between SR-IOV PF and VFs\n"
" --"OPT_LEGACY_MEM" Legacy memory mode (no dynamic allocation, contiguous segments)\n"
" --"OPT_SINGLE_FILE_SEGMENTS" Put all hugepage memory in single files\n"
" --"OPT_MATCH_ALLOCATIONS" Free hugepages exactly as allocated\n"
"\n");
/* Allow the application to print its usage message too if hook is set */
if (hook) {
printf("===== Application Usage =====\n\n");
(hook)(prgname);
}
}
static int
eal_parse_socket_arg(char *strval, volatile uint64_t *socket_arg)
{
char * arg[RTE_MAX_NUMA_NODES];
char *end;
int arg_num, i, len;
len = strnlen(strval, SOCKET_MEM_STRLEN);
if (len == SOCKET_MEM_STRLEN) {
RTE_LOG(ERR, EAL, "--socket-mem is too long\n");
return -1;
}
/* all other error cases will be caught later */
if (!isdigit(strval[len-1]))
return -1;
/* split the optarg into separate socket values */
arg_num = rte_strsplit(strval, len,
arg, RTE_MAX_NUMA_NODES, ',');
/* if split failed, or 0 arguments */
if (arg_num <= 0)
return -1;
/* parse each defined socket option */
errno = 0;
for (i = 0; i < arg_num; i++) {
uint64_t val;
end = NULL;
val = strtoull(arg[i], &end, 10);
/* check for invalid input */
if ((errno != 0) ||
(arg[i][0] == '\0') || (end == NULL) || (*end != '\0'))
return -1;
val <<= 20;
socket_arg[i] = val;
}
return 0;
}
static int
eal_parse_vfio_intr(const char *mode)
{
struct internal_config *internal_conf =
eal_get_internal_configuration();
unsigned i;
static struct {
const char *name;
enum rte_intr_mode value;
} map[] = {
{ "legacy", RTE_INTR_MODE_LEGACY },
{ "msi", RTE_INTR_MODE_MSI },
{ "msix", RTE_INTR_MODE_MSIX },
};
for (i = 0; i < RTE_DIM(map); i++) {
if (!strcmp(mode, map[i].name)) {
internal_conf->vfio_intr_mode = map[i].value;
return 0;
}
}
return -1;
}
static int
eal_parse_vfio_vf_token(const char *vf_token)
{
struct internal_config *cfg = eal_get_internal_configuration();
rte_uuid_t uuid;
if (!rte_uuid_parse(vf_token, uuid)) {
rte_uuid_copy(cfg->vfio_vf_token, uuid);
return 0;
}
return -1;
}
/* Parse the arguments for --log-level only */
static void
eal_log_level_parse(int argc, char **argv)
{
int opt;
char **argvopt;
int option_index;
const int old_optind = optind;
const int old_optopt = optopt;
char * const old_optarg = optarg;
struct internal_config *internal_conf =
eal_get_internal_configuration();
argvopt = argv;
optind = 1;
while ((opt = getopt_long(argc, argvopt, eal_short_options,
eal_long_options, &option_index)) != EOF) {
int ret;
/* getopt is not happy, stop right now */
if (opt == '?')
break;
ret = (opt == OPT_LOG_LEVEL_NUM) ?
eal_parse_common_option(opt, optarg, internal_conf) : 0;
/* common parser is not happy */
if (ret < 0)
break;
}
/* restore getopt lib */
optind = old_optind;
optopt = old_optopt;
optarg = old_optarg;
}
/* Parse the argument given in the command line of the application */
static int
eal_parse_args(int argc, char **argv)
{
int opt, ret;
char **argvopt;
int option_index;
char *prgname = argv[0];
const int old_optind = optind;
const int old_optopt = optopt;
char * const old_optarg = optarg;
struct internal_config *internal_conf =
eal_get_internal_configuration();
argvopt = argv;
optind = 1;
while ((opt = getopt_long(argc, argvopt, eal_short_options,
eal_long_options, &option_index)) != EOF) {
/* getopt didn't recognise the option */
if (opt == '?') {
eal_usage(prgname);
ret = -1;
goto out;
}
/* eal_log_level_parse() already handled this option */
if (opt == OPT_LOG_LEVEL_NUM)
continue;
ret = eal_parse_common_option(opt, optarg, internal_conf);
/* common parser is not happy */
if (ret < 0) {
eal_usage(prgname);
ret = -1;
goto out;
}
/* common parser handled this option */
if (ret == 0)
continue;
switch (opt) {
case 'h':
eal_usage(prgname);
exit(EXIT_SUCCESS);
case OPT_HUGE_DIR_NUM:
{
char *hdir = strdup(optarg);
if (hdir == NULL)
RTE_LOG(ERR, EAL, "Could not store hugepage directory\n");
else {
/* free old hugepage dir */
if (internal_conf->hugepage_dir != NULL)
free(internal_conf->hugepage_dir);
internal_conf->hugepage_dir = hdir;
}
break;
}
case OPT_FILE_PREFIX_NUM:
{
char *prefix = strdup(optarg);
if (prefix == NULL)
RTE_LOG(ERR, EAL, "Could not store file prefix\n");
else {
/* free old prefix */
if (internal_conf->hugefile_prefix != NULL)
free(internal_conf->hugefile_prefix);
internal_conf->hugefile_prefix = prefix;
}
break;
}
case OPT_SOCKET_MEM_NUM:
if (eal_parse_socket_arg(optarg,
internal_conf->socket_mem) < 0) {
RTE_LOG(ERR, EAL, "invalid parameters for --"
OPT_SOCKET_MEM "\n");
eal_usage(prgname);
ret = -1;
goto out;
}
internal_conf->force_sockets = 1;
break;
case OPT_SOCKET_LIMIT_NUM:
if (eal_parse_socket_arg(optarg,
internal_conf->socket_limit) < 0) {
RTE_LOG(ERR, EAL, "invalid parameters for --"
OPT_SOCKET_LIMIT "\n");
eal_usage(prgname);
ret = -1;
goto out;
}
internal_conf->force_socket_limits = 1;
break;
case OPT_VFIO_INTR_NUM:
if (eal_parse_vfio_intr(optarg) < 0) {
RTE_LOG(ERR, EAL, "invalid parameters for --"
OPT_VFIO_INTR "\n");
eal_usage(prgname);
ret = -1;
goto out;
}
break;
case OPT_VFIO_VF_TOKEN_NUM:
if (eal_parse_vfio_vf_token(optarg) < 0) {
RTE_LOG(ERR, EAL, "invalid parameters for --"
OPT_VFIO_VF_TOKEN "\n");
eal_usage(prgname);
ret = -1;
goto out;
}
break;
case OPT_CREATE_UIO_DEV_NUM:
internal_conf->create_uio_dev = 1;
break;
case OPT_MBUF_POOL_OPS_NAME_NUM:
{
char *ops_name = strdup(optarg);
if (ops_name == NULL)
RTE_LOG(ERR, EAL, "Could not store mbuf pool ops name\n");
else {
/* free old ops name */
if (internal_conf->user_mbuf_pool_ops_name !=
NULL)
free(internal_conf->user_mbuf_pool_ops_name);
internal_conf->user_mbuf_pool_ops_name =
ops_name;
}
break;
}
case OPT_MATCH_ALLOCATIONS_NUM:
internal_conf->match_allocations = 1;
break;
default:
if (opt < OPT_LONG_MIN_NUM && isprint(opt)) {
RTE_LOG(ERR, EAL, "Option %c is not supported "
"on Linux\n", opt);
} else if (opt >= OPT_LONG_MIN_NUM &&
opt < OPT_LONG_MAX_NUM) {
RTE_LOG(ERR, EAL, "Option %s is not supported "
"on Linux\n",
eal_long_options[option_index].name);
} else {
RTE_LOG(ERR, EAL, "Option %d is not supported "
"on Linux\n", opt);
}
eal_usage(prgname);
ret = -1;
goto out;
}
}
/* create runtime data directory. In no_shconf mode, skip any errors */
if (eal_create_runtime_dir() < 0) {
if (internal_conf->no_shconf == 0) {
RTE_LOG(ERR, EAL, "Cannot create runtime directory\n");
ret = -1;
goto out;
} else
RTE_LOG(WARNING, EAL, "No DPDK runtime directory created\n");
}
if (eal_adjust_config(internal_conf) != 0) {
ret = -1;
goto out;
}
/* sanity checks */
if (eal_check_common_options(internal_conf) != 0) {
eal_usage(prgname);
ret = -1;
goto out;
}
if (optind >= 0)
argv[optind-1] = prgname;
ret = optind-1;
out:
/* restore getopt lib */
optind = old_optind;
optopt = old_optopt;
optarg = old_optarg;
return ret;
}
static int
check_socket(const struct rte_memseg_list *msl, void *arg)
{
int *socket_id = arg;
if (msl->external)
return 0;
return *socket_id == msl->socket_id;
}
static void
eal_check_mem_on_local_socket(void)
{
int socket_id;
const struct rte_config *config = rte_eal_get_configuration();
socket_id = rte_lcore_to_socket_id(config->main_lcore);
if (rte_memseg_list_walk(check_socket, &socket_id) == 0)
RTE_LOG(WARNING, EAL, "WARNING: Main core has no memory on local socket!\n");
}
static int
sync_func(__rte_unused void *arg)
{
return 0;
}
/*
* Request iopl privilege for all RPL, returns 0 on success
* iopl() call is mostly for the i386 architecture. For other architectures,
* return -1 to indicate IO privilege can't be changed in this way.
*/
int
rte_eal_iopl_init(void)
{
#if defined(RTE_ARCH_X86)
if (iopl(3) != 0)
return -1;
#endif
return 0;
}
#ifdef VFIO_PRESENT
static int rte_eal_vfio_setup(void)
{
if (rte_vfio_enable("vfio"))
return -1;
return 0;
}
#endif
static void rte_eal_init_alert(const char *msg)
{
fprintf(stderr, "EAL: FATAL: %s\n", msg);
RTE_LOG(ERR, EAL, "%s\n", msg);
}
/*
* On Linux 3.6+, even if VFIO is not loaded, whenever IOMMU is enabled in the
* BIOS and in the kernel, /sys/kernel/iommu_groups path will contain kernel
* IOMMU groups. If IOMMU is not enabled, that path would be empty.
* Therefore, checking if the path is empty will tell us if IOMMU is enabled.
*/
static bool
is_iommu_enabled(void)
{
DIR *dir = opendir(KERNEL_IOMMU_GROUPS_PATH);
struct dirent *d;
int n = 0;
/* if directory doesn't exist, assume IOMMU is not enabled */
if (dir == NULL)
return false;
while ((d = readdir(dir)) != NULL) {
/* skip dot and dot-dot */
if (++n > 2)
break;
}
closedir(dir);
return n > 2;
}
/* Launch threads, called at application init(). */
int
rte_eal_init(int argc, char **argv)
{
int i, fctret, ret;
pthread_t thread_id;
static uint32_t run_once;
uint32_t has_run = 0;
const char *p;
static char logid[PATH_MAX];
char cpuset[RTE_CPU_AFFINITY_STR_LEN];
char thread_name[RTE_MAX_THREAD_NAME_LEN];
bool phys_addrs;
const struct rte_config *config = rte_eal_get_configuration();
struct internal_config *internal_conf =
eal_get_internal_configuration();
/* checks if the machine is adequate */
if (!rte_cpu_is_supported()) {
rte_eal_init_alert("unsupported cpu type.");
rte_errno = ENOTSUP;
return -1;
}
if (!__atomic_compare_exchange_n(&run_once, &has_run, 1, 0,
__ATOMIC_RELAXED, __ATOMIC_RELAXED)) {
rte_eal_init_alert("already called initialization.");
rte_errno = EALREADY;
return -1;
}
p = strrchr(argv[0], '/');
strlcpy(logid, p ? p + 1 : argv[0], sizeof(logid));
thread_id = pthread_self();
eal_reset_internal_config(internal_conf);
/* set log level as early as possible */
eal_log_level_parse(argc, argv);