]>
Commit | Line | Data |
---|---|---|
1 | /* SPDX-License-Identifier: GPL-2.0+ */ | |
2 | /* | |
3 | * load kernel modules | |
4 | * | |
5 | * Copyright © 2011 ProFUSION embedded systems | |
6 | */ | |
7 | ||
8 | #include <errno.h> | |
9 | #include <libkmod.h> | |
10 | #include <stdarg.h> | |
11 | #include <stdio.h> | |
12 | #include <stdlib.h> | |
13 | ||
14 | #include "module-util.h" | |
15 | #include "string-util.h" | |
16 | #include "udev-builtin.h" | |
17 | ||
18 | static struct kmod_ctx *ctx = NULL; | |
19 | ||
20 | _printf_(6,0) static void udev_kmod_log(void *data, int priority, const char *file, int line, const char *fn, const char *format, va_list args) { | |
21 | log_internalv(priority, 0, file, line, fn, format, args); | |
22 | } | |
23 | ||
24 | static int builtin_kmod(sd_device *dev, int argc, char *argv[], bool test) { | |
25 | int i; | |
26 | ||
27 | if (!ctx) | |
28 | return 0; | |
29 | ||
30 | if (argc < 3 || !streq(argv[1], "load")) | |
31 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
32 | "%s: expected: load <module>", argv[0]); | |
33 | ||
34 | for (i = 2; argv[i]; i++) | |
35 | (void) module_load_and_warn(ctx, argv[i], false); | |
36 | ||
37 | return 0; | |
38 | } | |
39 | ||
40 | /* called at udev startup and reload */ | |
41 | static int builtin_kmod_init(void) { | |
42 | if (ctx) | |
43 | return 0; | |
44 | ||
45 | ctx = kmod_new(NULL, NULL); | |
46 | if (!ctx) | |
47 | return -ENOMEM; | |
48 | ||
49 | log_debug("Load module index"); | |
50 | kmod_set_log_fn(ctx, udev_kmod_log, NULL); | |
51 | kmod_load_resources(ctx); | |
52 | return 0; | |
53 | } | |
54 | ||
55 | /* called on udev shutdown and reload request */ | |
56 | static void builtin_kmod_exit(void) { | |
57 | log_debug("Unload module index"); | |
58 | ctx = kmod_unref(ctx); | |
59 | } | |
60 | ||
61 | /* called every couple of seconds during event activity; 'true' if config has changed */ | |
62 | static bool builtin_kmod_validate(void) { | |
63 | log_debug("Validate module index"); | |
64 | if (!ctx) | |
65 | return false; | |
66 | return (kmod_validate_resources(ctx) != KMOD_RESOURCES_OK); | |
67 | } | |
68 | ||
69 | const struct udev_builtin udev_builtin_kmod = { | |
70 | .name = "kmod", | |
71 | .cmd = builtin_kmod, | |
72 | .init = builtin_kmod_init, | |
73 | .exit = builtin_kmod_exit, | |
74 | .validate = builtin_kmod_validate, | |
75 | .help = "Kernel module loader", | |
76 | .run_once = false, | |
77 | }; |