2 This file is part of systemd.
4 Copyright 2010 Lennart Poettering
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
28 #include "capability-util.h"
29 #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_internalv(LOG_DEBUG
, 0, file
, line
, fn
, format
, args
);
48 int kmod_setup(void) {
54 bool warn_if_unavailable
:1;
55 bool warn_if_module
:1;
56 bool (*condition_fn
)(void);
58 /* auto-loading on use doesn't work before udev is up */
59 { "autofs4", "/sys/class/misc/autofs", true, false, NULL
},
61 /* early configure of ::1 on the loopback device */
62 { "ipv6", "/sys/module/ipv6", false, true, NULL
},
64 /* this should never be a module */
65 { "unix", "/proc/net/unix", true, true, NULL
},
67 /* IPC is needed before we bring up any other services */
68 { "kdbus", "/sys/fs/kdbus", false, false, is_kdbus_wanted
},
71 /* netfilter is needed by networkd, nspawn among others, and cannot be autoloaded */
72 { "ip_tables", "/proc/net/ip_tables_names", false, false, NULL
},
75 struct kmod_ctx
*ctx
= NULL
;
79 if (have_effective_cap(CAP_SYS_MODULE
) == 0)
82 for (i
= 0; i
< ELEMENTSOF(kmod_table
); i
++) {
83 struct kmod_module
*mod
;
85 if (kmod_table
[i
].path
&& access(kmod_table
[i
].path
, F_OK
) >= 0)
88 if (kmod_table
[i
].condition_fn
&& !kmod_table
[i
].condition_fn())
91 if (kmod_table
[i
].warn_if_module
)
92 log_debug("Your kernel apparently lacks built-in %s support. Might be "
93 "a good idea to compile it in. We'll now try to work around "
94 "this by loading the module...", kmod_table
[i
].module
);
97 ctx
= kmod_new(NULL
, NULL
);
101 kmod_set_log_fn(ctx
, systemd_kmod_log
, NULL
);
102 kmod_load_resources(ctx
);
105 r
= kmod_module_new_from_name(ctx
, kmod_table
[i
].module
, &mod
);
107 log_error("Failed to lookup module '%s'", kmod_table
[i
].module
);
111 r
= kmod_module_probe_insert_module(mod
, KMOD_PROBE_APPLY_BLACKLIST
, NULL
, NULL
, NULL
, NULL
);
113 log_debug("Inserted module '%s'", kmod_module_get_name(mod
));
114 else if (r
== KMOD_PROBE_APPLY_BLACKLIST
)
115 log_info("Module '%s' is blacklisted", kmod_module_get_name(mod
));
117 bool print_warning
= kmod_table
[i
].warn_if_unavailable
|| (r
< 0 && r
!= -ENOENT
);
119 log_full_errno(print_warning
? LOG_WARNING
: LOG_DEBUG
, r
,
120 "Failed to insert module '%s': %m", kmod_module_get_name(mod
));
123 kmod_module_unref(mod
);