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-util.h"
31 #include "kmod-setup.h"
35 static void systemd_kmod_log(
38 const char *file
, int line
,
43 /* library logging is enabled at debug only */
44 DISABLE_WARNING_FORMAT_NONLITERAL
;
45 log_internalv(LOG_DEBUG
, 0, file
, line
, fn
, format
, args
);
50 int kmod_setup(void) {
56 bool warn_if_unavailable
:1;
57 bool warn_if_module
:1;
58 bool (*condition_fn
)(void);
60 /* auto-loading on use doesn't work before udev is up */
61 { "autofs4", "/sys/class/misc/autofs", true, false, NULL
},
63 /* early configure of ::1 on the loopback device */
64 { "ipv6", "/sys/module/ipv6", false, true, NULL
},
66 /* this should never be a module */
67 { "unix", "/proc/net/unix", true, true, NULL
},
69 /* IPC is needed before we bring up any other services */
70 { "kdbus", "/sys/fs/kdbus", false, false, is_kdbus_wanted
},
73 /* netfilter is needed by networkd, nspawn among others, and cannot be autoloaded */
74 { "ip_tables", "/proc/net/ip_tables_names", false, false, NULL
},
77 struct kmod_ctx
*ctx
= NULL
;
81 if (have_effective_cap(CAP_SYS_MODULE
) == 0)
84 for (i
= 0; i
< ELEMENTSOF(kmod_table
); i
++) {
85 struct kmod_module
*mod
;
87 if (kmod_table
[i
].path
&& access(kmod_table
[i
].path
, F_OK
) >= 0)
90 if (kmod_table
[i
].condition_fn
&& !kmod_table
[i
].condition_fn())
93 if (kmod_table
[i
].warn_if_module
)
94 log_debug("Your kernel apparently lacks built-in %s support. Might be "
95 "a good idea to compile it in. We'll now try to work around "
96 "this by loading the module...", kmod_table
[i
].module
);
99 ctx
= kmod_new(NULL
, NULL
);
103 kmod_set_log_fn(ctx
, systemd_kmod_log
, NULL
);
104 kmod_load_resources(ctx
);
107 r
= kmod_module_new_from_name(ctx
, kmod_table
[i
].module
, &mod
);
109 log_error("Failed to lookup module '%s'", kmod_table
[i
].module
);
113 r
= kmod_module_probe_insert_module(mod
, KMOD_PROBE_APPLY_BLACKLIST
, NULL
, NULL
, NULL
, NULL
);
115 log_debug("Inserted module '%s'", kmod_module_get_name(mod
));
116 else if (r
== KMOD_PROBE_APPLY_BLACKLIST
)
117 log_info("Module '%s' is blacklisted", kmod_module_get_name(mod
));
119 bool print_warning
= kmod_table
[i
].warn_if_unavailable
|| (r
< 0 && r
!= -ENOENT
);
121 log_full_errno(print_warning
? LOG_WARNING
: LOG_DEBUG
, r
,
122 "Failed to insert module '%s': %m", kmod_module_get_name(mod
));
125 kmod_module_unref(mod
);