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/*-*- 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 <http://www.gnu.org/licenses/>.
***/
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <sys/stat.h>
#include <limits.h>
#include <dirent.h>
#include <libkmod.h>
#include "log.h"
#include "util.h"
#include "strv.h"
#include "conf-files.h"
#include "virt.h"
static char **arg_proc_cmdline_modules = NULL;
#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, **k;
k = strv_split(p, ",");
if (!k)
return log_oom();
t = strv_merge(arg_proc_cmdline_modules, k);
strv_free(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) {
char _cleanup_free_ *line = NULL;
char *w, *state;
int r;
size_t l;
if (detect_container(NULL) > 0)
return 0;
r = read_one_line_file("/proc/cmdline", &line);
if (r < 0) {
log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
return 0;
}
FOREACH_WORD_QUOTED(w, l, line, state) {
char _cleanup_free_ *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_info("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;
}
int main(int argc, char *argv[]) {
int r = EXIT_FAILURE, k;
char **files = NULL, **fn, **i;
struct kmod_ctx *ctx;
if (argc > 1) {
log_error("This program takes no argument.");
return EXIT_FAILURE;
}
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 = EXIT_SUCCESS;
STRV_FOREACH(i, arg_proc_cmdline_modules) {
k = load_module(ctx, *i);
if (k < 0)
r = EXIT_FAILURE;
}
k = conf_files_list(&files, ".conf",
"/etc/modules-load.d",
"/run/modules-load.d",
"/usr/local/lib/modules-load.d",
"/usr/lib/modules-load.d",
#ifdef HAVE_SPLIT_USR
"/lib/modules-load.d",
#endif
NULL);
if (k < 0) {
log_error("Failed to enumerate modules-load.d files: %s", strerror(-k));
r = EXIT_FAILURE;
goto finish;
}
STRV_FOREACH(fn, files) {
FILE *f;
f = fopen(*fn, "re");
if (!f) {
if (errno == ENOENT)
continue;
log_error("Failed to open %s: %m", *fn);
r = EXIT_FAILURE;
continue;
}
log_debug("apply: %s\n", *fn);
for (;;) {
char line[LINE_MAX], *l;
if (!fgets(line, sizeof(line), f))
break;
l = strstrip(line);
if (*l == '#' || *l == 0)
continue;
k = load_module(ctx, l);
if (k < 0)
r = EXIT_FAILURE;
}
if (ferror(f)) {
log_error("Failed to read from file: %m");
r = EXIT_FAILURE;
}
fclose(f);
}
finish:
strv_free(files);
kmod_unref(ctx);
strv_free(arg_proc_cmdline_modules);
return r;
}
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