projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| a2818ee4 JL |
1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | // Copyright (C) 2014 Seth Jennings <sjenning@redhat.com> | |
| 3 | ||
| 4 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
| 5 | ||
| 6 | #include <linux/module.h> | |
| 7 | #include <linux/kernel.h> | |
| 8 | #include <linux/livepatch.h> | |
| 9 | ||
| 10 | #include <linux/seq_file.h> | |
| 11 | static int livepatch_cmdline_proc_show(struct seq_file *m, void *v) | |
| 12 | { | |
| 13 | seq_printf(m, "%s: %s\n", THIS_MODULE->name, | |
| 14 | "this has been live patched"); | |
| 15 | return 0; | |
| 16 | } | |
| 17 | ||
| 18 | static struct klp_func funcs[] = { | |
| 19 | { | |
| 20 | .old_name = "cmdline_proc_show", | |
| 21 | .new_func = livepatch_cmdline_proc_show, | |
| 22 | }, { } | |
| 23 | }; | |
| 24 | ||
| 25 | static struct klp_object objs[] = { | |
| 26 | { | |
| 27 | /* name being NULL means vmlinux */ | |
| 28 | .funcs = funcs, | |
| 29 | }, { } | |
| 30 | }; | |
| 31 | ||
| 32 | static struct klp_patch patch = { | |
| 33 | .mod = THIS_MODULE, | |
| 34 | .objs = objs, | |
| 35 | }; | |
| 36 | ||
| 37 | static int test_klp_livepatch_init(void) | |
| 38 | { | |
| 39 | return klp_enable_patch(&patch); | |
| 40 | } | |
| 41 | ||
| 42 | static void test_klp_livepatch_exit(void) | |
| 43 | { | |
| 44 | } | |
| 45 | ||
| 46 | module_init(test_klp_livepatch_init); | |
| 47 | module_exit(test_klp_livepatch_exit); | |
| 48 | MODULE_LICENSE("GPL"); | |
| 49 | MODULE_INFO(livepatch, "Y"); | |
| 50 | MODULE_AUTHOR("Seth Jennings <sjenning@redhat.com>"); | |
| 51 | MODULE_DESCRIPTION("Livepatch test: livepatch module"); |