/*-*- 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 <sys/wait.h> #include <unistd.h> #include <string.h> #include <errno.h> #include <libkmod.h> #include "macro.h" #include "execute.h" #include "kmod-setup.h" typedef struct Kmodule { const char *name; const char *directory; bool (*condition_fn)(void); } KModule; static const KModule kmod_table[] = { { "autofs4", "/sys/class/misc/autofs", NULL } , { "ipv6", "/sys/module/ipv6", NULL }, { "unix", "/proc/net/unix", 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) { /* library logging is enabled at debug only */ log_metav(LOG_DEBUG, file, line, fn, format, args); } #pragma GCC diagnostic pop int kmod_setup(void) { unsigned i; struct kmod_ctx *ctx = NULL; struct kmod_module *mod; int err; for (i = 0; i < ELEMENTSOF(kmod_table); i += 2) { if (kmod_table[i].condition_fn && !kmod_table[i].condition_fn()) continue; if (access(kmod_table[i].directory, F_OK) >= 0) continue; log_debug("Your kernel apparently lacks built-in %s support. Might be a good idea to compile it in. " "We'll now try to work around this by loading the module...", kmod_table[i].name); if (!ctx) { ctx = kmod_new(NULL, NULL); if (!ctx) { log_error("Failed to allocate memory for kmod"); return -ENOMEM; } kmod_set_log_fn(ctx, systemd_kmod_log, NULL); kmod_load_resources(ctx); } err = kmod_module_new_from_name(ctx, kmod_table[i].name, &mod); if (err < 0) { log_error("Failed to lookup module '%s'", kmod_table[i].name); continue; } err = kmod_module_probe_insert_module(mod, KMOD_PROBE_APPLY_BLACKLIST, 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 module '%s'", kmod_module_get_name(mod)); kmod_module_unref(mod); } if (ctx) kmod_unref(ctx); return 0; }