1 /*
2 * kmod-insert - insert a module into the kernel.
3 *
4 * Copyright (C) 2015 Intel Corporation. All rights reserved.
5 * Copyright (C) 2011-2013 ProFUSION embedded systems
6 *
7 * This program is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 */
20
21 #include <errno.h>
22 #include <getopt.h>
23 #include <stdlib.h>
24 #include <string.h>
25
26 #include <libkmod/libkmod.h>
27
28 #include "kmod.h"
29
30 static const char cmdopts_s[] = "h";
31 static const struct option cmdopts[] = {
32 {"help", no_argument, 0, 'h'},
33 { }
34 };
35
help(void)36 static void help(void)
37 {
38 printf("Usage:\n"
39 "\t%s insert [options] module\n"
40 "Options:\n"
41 "\t-h, --help show this help\n",
42 program_invocation_short_name);
43 }
44
mod_strerror(int err)45 static const char *mod_strerror(int err)
46 {
47 switch (err) {
48 case KMOD_PROBE_APPLY_BLACKLIST:
49 return "Module is blacklisted";
50 case -EEXIST:
51 return "Module already in kernel";
52 case -ENOENT:
53 return "Unknown symbol in module or unknown parameter (see dmesg)";
54 default:
55 return strerror(-err);
56 }
57 }
58
do_insert(int argc,char * argv[])59 static int do_insert(int argc, char *argv[])
60 {
61 struct kmod_ctx *ctx;
62 struct kmod_list *list = NULL, *l;
63 const char *name;
64 int err, r = EXIT_SUCCESS;
65
66 for (;;) {
67 int c, idx = 0;
68 c = getopt_long(argc, argv, cmdopts_s, cmdopts, &idx);
69 if (c == -1)
70 break;
71 switch (c) {
72 case 'h':
73 help();
74 return EXIT_SUCCESS;
75 default:
76 ERR("Unexpected getopt_long() value '%c'.\n", c);
77 return EXIT_FAILURE;
78 }
79 }
80
81 if (optind >= argc) {
82 ERR("Missing module name\n");
83 return EXIT_FAILURE;
84 }
85
86 ctx = kmod_new(NULL, NULL);
87 if (!ctx) {
88 ERR("kmod_new() failed!\n");
89 return EXIT_FAILURE;
90 }
91
92 name = argv[optind];
93 err = kmod_module_new_from_lookup(ctx, name, &list);
94 if (err < 0) {
95 ERR("Could not lookup module matching '%s': %s\n", name, strerror(-err));
96 r = EXIT_FAILURE;
97 goto end;
98 }
99
100 if (list == NULL) {
101 ERR("No module matches '%s'\n", name);
102 r = EXIT_FAILURE;
103 goto end;
104 }
105
106 kmod_list_foreach(l, list) {
107 struct kmod_module *mod = kmod_module_get_module(l);
108
109 err = kmod_module_probe_insert_module(mod, KMOD_PROBE_APPLY_BLACKLIST, NULL, NULL, NULL, NULL);
110 if (err != 0) {
111 r = EXIT_FAILURE;
112 ERR("Could not insert '%s': %s\n", kmod_module_get_name(mod), mod_strerror(err));
113 }
114
115 kmod_module_unref(mod);
116 }
117
118 kmod_module_unref_list(list);
119 end:
120 kmod_unref(ctx);
121 return r;
122 }
123
124 const struct kmod_cmd kmod_cmd_insert = {
125 .name = "insert",
126 .cmd = do_insert,
127 .help = "insert a module into the kernel",
128 };
129