1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
30 #include "capability.h"
31 #include "kmod-setup.h"
33 static void systemd_kmod_log(
36 const char *file, int line,
41 /* library logging is enabled at debug only */
42 DISABLE_WARNING_FORMAT_NONLITERAL;
43 log_metav(LOG_DEBUG, file, line, fn, format, args);
47 static bool cmdline_check_kdbus(void) {
48 _cleanup_free_ char *line = NULL;
50 if (proc_cmdline(&line) <= 0)
53 return strstr(line, "kdbus") != NULL;
56 int kmod_setup(void) {
62 bool (*condition_fn)(void);
64 /* auto-loading on use doesn't work before udev is up */
65 { "autofs4", "/sys/class/misc/autofs", true, NULL },
67 /* early configure of ::1 on the loopback device */
68 { "ipv6", "/sys/module/ipv6", true, NULL },
70 /* this should never be a module */
71 { "unix", "/proc/net/unix", true, NULL },
73 /* IPC is needed before we bring up any other services */
74 { "kdbus", "/sys/bus/kdbus", false, cmdline_check_kdbus },
76 struct kmod_ctx *ctx = NULL;
80 if (have_effective_cap(CAP_SYS_MODULE) == 0)
83 for (i = 0; i < ELEMENTSOF(kmod_table); i++) {
84 struct kmod_module *mod;
86 if (kmod_table[i].path && access(kmod_table[i].path, F_OK) >= 0)
89 if (kmod_table[i].condition_fn && !kmod_table[i].condition_fn())
92 if (kmod_table[i].warn)
93 log_debug("Your kernel apparently lacks built-in %s support. Might be "
94 "a good idea to compile it in. We'll now try to work around "
95 "this by loading the module...", kmod_table[i].module);
98 ctx = kmod_new(NULL, NULL);
102 kmod_set_log_fn(ctx, systemd_kmod_log, NULL);
103 kmod_load_resources(ctx);
106 r = kmod_module_new_from_name(ctx, kmod_table[i].module, &mod);
108 log_error("Failed to lookup module '%s'", kmod_table[i].module);
112 r = kmod_module_probe_insert_module(mod, KMOD_PROBE_APPLY_BLACKLIST, NULL, NULL, NULL, NULL);
114 log_info("Inserted module '%s'", kmod_module_get_name(mod));
115 else if (r == KMOD_PROBE_APPLY_BLACKLIST)
116 log_info("Module '%s' is blacklisted", kmod_module_get_name(mod));
117 else if (kmod_table[i].warn)
118 log_error("Failed to insert module '%s'", kmod_module_get_name(mod));
120 kmod_module_unref(mod);