/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2010 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see .
***/
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include "log.h"
#include "util.h"
#include "strv.h"
#include "conf-files.h"
#include "fileio.h"
static char **arg_proc_cmdline_modules = NULL;
static const char conf_file_dirs[] =
"/etc/modules-load.d\0"
"/run/modules-load.d\0"
"/usr/local/lib/modules-load.d\0"
"/usr/lib/modules-load.d\0"
#ifdef HAVE_SPLIT_USR
"/lib/modules-load.d\0"
#endif
;
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wformat-nonliteral"
static void systemd_kmod_log(void *data, int priority, const char *file, int line,
const char *fn, const char *format, va_list args)
{
log_metav(priority, file, line, fn, format, args);
}
#pragma GCC diagnostic pop
static int add_modules(const char *p) {
char **t;
_cleanup_strv_free_ char **k = NULL;
k = strv_split(p, ",");
if (!k)
return log_oom();
t = strv_merge(arg_proc_cmdline_modules, k);
if (!t)
return log_oom();
strv_free(arg_proc_cmdline_modules);
arg_proc_cmdline_modules = t;
return 0;
}
static int parse_proc_cmdline(void) {
_cleanup_free_ char *line = NULL;
char *w, *state;
size_t l;
int r;
r = proc_cmdline(&line);
if (r < 0)
log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
if (r <= 0)
return 0;
FOREACH_WORD_QUOTED(w, l, line, state) {
_cleanup_free_ char *word;
word = strndup(w, l);
if (!word)
return log_oom();
if (startswith(word, "modules-load=")) {
r = add_modules(word + 13);
if (r < 0)
return r;
} else if (startswith(word, "rd.modules-load=")) {
if (in_initrd()) {
r = add_modules(word + 16);
if (r < 0)
return r;
}
}
}
return 0;
}
static int load_module(struct kmod_ctx *ctx, const char *m) {
const int probe_flags = KMOD_PROBE_APPLY_BLACKLIST;
struct kmod_list *itr, *modlist = NULL;
int r = 0;
log_debug("load: %s\n", m);
r = kmod_module_new_from_lookup(ctx, m, &modlist);
if (r < 0) {
log_error("Failed to lookup alias '%s': %s", m, strerror(-r));
return r;
}
if (!modlist) {
log_error("Failed to find module '%s'", m);
return -ENOENT;
}
kmod_list_foreach(itr, modlist) {
struct kmod_module *mod;
int state, err;
mod = kmod_module_get_module(itr);
state = kmod_module_get_initstate(mod);
switch (state) {
case KMOD_MODULE_BUILTIN:
log_info("Module '%s' is builtin", kmod_module_get_name(mod));
break;
case KMOD_MODULE_LIVE:
log_debug("Module '%s' is already loaded", kmod_module_get_name(mod));
break;
default:
err = kmod_module_probe_insert_module(mod, probe_flags,
NULL, NULL, NULL, NULL);
if (err == 0)
log_info("Inserted module '%s'", kmod_module_get_name(mod));
else if (err == KMOD_PROBE_APPLY_BLACKLIST)
log_info("Module '%s' is blacklisted", kmod_module_get_name(mod));
else {
log_error("Failed to insert '%s': %s", kmod_module_get_name(mod),
strerror(-err));
r = err;
}
}
kmod_module_unref(mod);
}
kmod_module_unref_list(modlist);
return r;
}
static int apply_file(struct kmod_ctx *ctx, const char *path, bool ignore_enoent) {
_cleanup_fclose_ FILE *f = NULL;
int r;
assert(ctx);
assert(path);
r = search_and_fopen_nulstr(path, "re", conf_file_dirs, &f);
if (r < 0) {
if (ignore_enoent && r == -ENOENT)
return 0;
log_error("Failed to open %s, ignoring: %s", path, strerror(-r));
return r;
}
log_debug("apply: %s\n", path);
for (;;) {
char line[LINE_MAX], *l;
int k;
if (!fgets(line, sizeof(line), f)) {
if (feof(f))
break;
log_error("Failed to read file '%s', ignoring: %m", path);
return -errno;
}
l = strstrip(line);
if (!*l)
continue;
if (strchr(COMMENTS "\n", *l))
continue;
k = load_module(ctx, l);
if (k < 0 && r == 0)
r = k;
}
return r;
}
static int help(void) {
printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n"
"Loads statically configured kernel modules.\n\n"
" -h --help Show this help\n",
program_invocation_short_name);
return 0;
}
static int parse_argv(int argc, char *argv[]) {
static const struct option options[] = {
{ "help", no_argument, NULL, 'h' },
{ NULL, 0, NULL, 0 }
};
int c;
assert(argc >= 0);
assert(argv);
while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) {
switch (c) {
case 'h':
help();
return 0;
case '?':
return -EINVAL;
default:
log_error("Unknown option code %c", c);
return -EINVAL;
}
}
return 1;
}
int main(int argc, char *argv[]) {
int r, k;
struct kmod_ctx *ctx;
r = parse_argv(argc, argv);
if (r <= 0)
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
log_set_target(LOG_TARGET_AUTO);
log_parse_environment();
log_open();
umask(0022);
if (parse_proc_cmdline() < 0)
return EXIT_FAILURE;
ctx = kmod_new(NULL, NULL);
if (!ctx) {
log_error("Failed to allocate memory for kmod.");
goto finish;
}
kmod_load_resources(ctx);
kmod_set_log_fn(ctx, systemd_kmod_log, NULL);
r = 0;
if (argc > optind) {
int i;
for (i = optind; i < argc; i++) {
k = apply_file(ctx, argv[i], false);
if (k < 0 && r == 0)
r = k;
}
} else {
_cleanup_free_ char **files = NULL;
char **fn, **i;
STRV_FOREACH(i, arg_proc_cmdline_modules) {
k = load_module(ctx, *i);
if (k < 0 && r == 0)
r = k;
}
r = conf_files_list_nulstr(&files, ".conf", NULL, conf_file_dirs);
if (r < 0) {
log_error("Failed to enumerate modules-load.d files: %s", strerror(-r));
goto finish;
}
STRV_FOREACH(fn, files) {
k = apply_file(ctx, *fn, true);
if (k < 0 && r == 0)
r = k;
}
}
finish:
kmod_unref(ctx);
strv_free(arg_proc_cmdline_modules);
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}