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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
11c3a4ee LP |
2 | |
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
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 | |
11c3a4ee LP |
11 | (at your option) any later version. |
12 | ||
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 | |
5430f7f2 | 16 | Lesser General Public License for more details. |
11c3a4ee | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
11c3a4ee LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
22 | #include <sys/wait.h> | |
23 | #include <unistd.h> | |
24 | #include <string.h> | |
25 | #include <errno.h> | |
728beb28 | 26 | #include <libkmod.h> |
11c3a4ee LP |
27 | |
28 | #include "macro.h" | |
29 | #include "execute.h" | |
30 | ||
31 | #include "kmod-setup.h" | |
32 | ||
10223732 KS |
33 | typedef struct Kmodule { |
34 | const char *name; | |
35 | const char *directory; | |
36 | bool (*condition_fn)(void); | |
37 | } KModule; | |
38 | ||
39 | static const KModule kmod_table[] = { | |
40 | { "autofs4", "/sys/class/misc/autofs", NULL } , | |
41 | { "ipv6", "/sys/module/ipv6", NULL }, | |
10223732 | 42 | { "unix", "/proc/net/unix", NULL } , |
11c3a4ee LP |
43 | }; |
44 | ||
cdb454f2 LP |
45 | #pragma GCC diagnostic push |
46 | #pragma GCC diagnostic ignored "-Wformat-nonliteral" | |
728beb28 TG |
47 | static void systemd_kmod_log(void *data, int priority, const char *file, int line, |
48 | const char *fn, const char *format, va_list args) | |
49 | { | |
10223732 KS |
50 | /* library logging is enabled at debug only */ |
51 | log_metav(LOG_DEBUG, file, line, fn, format, args); | |
728beb28 | 52 | } |
cdb454f2 | 53 | #pragma GCC diagnostic pop |
728beb28 | 54 | |
11c3a4ee | 55 | int kmod_setup(void) { |
728beb28 TG |
56 | unsigned i; |
57 | struct kmod_ctx *ctx = NULL; | |
58 | struct kmod_module *mod; | |
59 | int err; | |
11c3a4ee LP |
60 | |
61 | for (i = 0; i < ELEMENTSOF(kmod_table); i += 2) { | |
10223732 KS |
62 | if (kmod_table[i].condition_fn && !kmod_table[i].condition_fn()) |
63 | continue; | |
11c3a4ee | 64 | |
10223732 | 65 | if (access(kmod_table[i].directory, F_OK) >= 0) |
11c3a4ee LP |
66 | continue; |
67 | ||
be11c12e | 68 | log_debug("Your kernel apparently lacks built-in %s support. Might be a good idea to compile it in. " |
728beb28 | 69 | "We'll now try to work around this by loading the module...", |
10223732 | 70 | kmod_table[i].name); |
11c3a4ee | 71 | |
728beb28 TG |
72 | if (!ctx) { |
73 | ctx = kmod_new(NULL, NULL); | |
74 | if (!ctx) { | |
75 | log_error("Failed to allocate memory for kmod"); | |
76 | return -ENOMEM; | |
77 | } | |
11c3a4ee | 78 | |
728beb28 | 79 | kmod_set_log_fn(ctx, systemd_kmod_log, NULL); |
728beb28 TG |
80 | kmod_load_resources(ctx); |
81 | } | |
11c3a4ee | 82 | |
10223732 | 83 | err = kmod_module_new_from_name(ctx, kmod_table[i].name, &mod); |
728beb28 | 84 | if (err < 0) { |
10223732 | 85 | log_error("Failed to lookup module '%s'", kmod_table[i].name); |
728beb28 TG |
86 | continue; |
87 | } | |
11c3a4ee | 88 | |
728beb28 TG |
89 | err = kmod_module_probe_insert_module(mod, KMOD_PROBE_APPLY_BLACKLIST, NULL, NULL, NULL, NULL); |
90 | if (err == 0) | |
91 | log_info("Inserted module '%s'", kmod_module_get_name(mod)); | |
92 | else if (err == KMOD_PROBE_APPLY_BLACKLIST) | |
93 | log_info("Module '%s' is blacklisted", kmod_module_get_name(mod)); | |
94 | else | |
10223732 | 95 | log_error("Failed to insert module '%s'", kmod_module_get_name(mod)); |
11c3a4ee | 96 | |
728beb28 | 97 | kmod_module_unref(mod); |
11c3a4ee LP |
98 | } |
99 | ||
728beb28 | 100 | if (ctx) |
34a35ece | 101 | kmod_unref(ctx); |
728beb28 TG |
102 | |
103 | return 0; | |
11c3a4ee | 104 | } |