105 lines
3.5 KiB
C
105 lines
3.5 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <sys/wait.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <libkmod.h>
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#include "macro.h"
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#include "execute.h"
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#include "kmod-setup.h"
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typedef struct Kmodule {
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const char *name;
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const char *directory;
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bool (*condition_fn)(void);
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} KModule;
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static const KModule kmod_table[] = {
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{ "autofs4", "/sys/class/misc/autofs", NULL } ,
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{ "ipv6", "/sys/module/ipv6", NULL },
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{ "unix", "/proc/net/unix", NULL } ,
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};
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wformat-nonliteral"
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static void systemd_kmod_log(void *data, int priority, const char *file, int line,
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const char *fn, const char *format, va_list args)
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{
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/* library logging is enabled at debug only */
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log_metav(LOG_DEBUG, file, line, fn, format, args);
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}
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#pragma GCC diagnostic pop
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int kmod_setup(void) {
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unsigned i;
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struct kmod_ctx *ctx = NULL;
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struct kmod_module *mod;
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int err;
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for (i = 0; i < ELEMENTSOF(kmod_table); i += 2) {
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if (kmod_table[i].condition_fn && !kmod_table[i].condition_fn())
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continue;
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if (access(kmod_table[i].directory, F_OK) >= 0)
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continue;
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log_debug("Your kernel apparently lacks built-in %s support. Might be a good idea to compile it in. "
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"We'll now try to work around this by loading the module...",
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kmod_table[i].name);
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if (!ctx) {
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ctx = kmod_new(NULL, NULL);
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if (!ctx) {
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log_error("Failed to allocate memory for kmod");
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return -ENOMEM;
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}
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kmod_set_log_fn(ctx, systemd_kmod_log, NULL);
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kmod_load_resources(ctx);
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}
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err = kmod_module_new_from_name(ctx, kmod_table[i].name, &mod);
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if (err < 0) {
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log_error("Failed to lookup module '%s'", kmod_table[i].name);
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continue;
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}
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err = kmod_module_probe_insert_module(mod, KMOD_PROBE_APPLY_BLACKLIST, NULL, NULL, NULL, NULL);
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if (err == 0)
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log_info("Inserted module '%s'", kmod_module_get_name(mod));
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else if (err == KMOD_PROBE_APPLY_BLACKLIST)
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log_info("Module '%s' is blacklisted", kmod_module_get_name(mod));
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else
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log_error("Failed to insert module '%s'", kmod_module_get_name(mod));
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kmod_module_unref(mod);
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}
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if (ctx)
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kmod_unref(ctx);
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return 0;
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}
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