projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 9308f2f9 LR |
1 | /* |
| 2 | * proc sysctl test driver | |
| 3 | * | |
| 4 | * Copyright (C) 2017 Luis R. Rodriguez <mcgrof@kernel.org> | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or modify it | |
| 7 | * under the terms of the GNU General Public License as published by the Free | |
| 8 | * Software Foundation; either version 2 of the License, or at your option any | |
| 9 | * later version; or, when distributed separately from the Linux kernel or | |
| 10 | * when incorporated into other software packages, subject to the following | |
| 11 | * license: | |
| 12 | * | |
| 13 | * This program is free software; you can redistribute it and/or modify it | |
| 14 | * under the terms of copyleft-next (version 0.3.1 or later) as published | |
| 15 | * at http://copyleft-next.org/. | |
| 16 | */ | |
| 17 | ||
| 18 | /* | |
| 19 | * This module provides an interface to the the proc sysctl interfaces. This | |
| 20 | * driver requires CONFIG_PROC_SYSCTL. It will not normally be loaded by the | |
| 21 | * system unless explicitly requested by name. You can also build this driver | |
| 22 | * into your kernel. | |
| 23 | */ | |
| 24 | ||
| 25 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
| 26 | ||
| 27 | #include <linux/init.h> | |
| 28 | #include <linux/list.h> | |
| 29 | #include <linux/module.h> | |
| 30 | #include <linux/printk.h> | |
| 31 | #include <linux/fs.h> | |
| 32 | #include <linux/miscdevice.h> | |
| 33 | #include <linux/slab.h> | |
| 34 | #include <linux/uaccess.h> | |
| 35 | #include <linux/async.h> | |
| 36 | #include <linux/delay.h> | |
| 37 | #include <linux/vmalloc.h> | |
| 38 | ||
| 39 | static int i_zero; | |
| 40 | static int i_one_hundred = 100; | |
| 41 | ||
| 42 | struct test_sysctl_data { | |
| 43 | int int_0001; | |
| 44 | char string_0001[65]; | |
| 45 | }; | |
| 46 | ||
| 47 | static struct test_sysctl_data test_data = { | |
| 48 | .int_0001 = 60, | |
| 49 | .string_0001 = "(none)", | |
| 50 | }; | |
| 51 | ||
| 52 | /* These are all under /proc/sys/debug/test_sysctl/ */ | |
| 53 | static struct ctl_table test_table[] = { | |
| 54 | { | |
| 55 | .procname = "int_0001", | |
| 56 | .data = &test_data.int_0001, | |
| 57 | .maxlen = sizeof(int), | |
| 58 | .mode = 0644, | |
| 59 | .proc_handler = proc_dointvec_minmax, | |
| 60 | .extra1 = &i_zero, | |
| 61 | .extra2 = &i_one_hundred, | |
| 62 | }, | |
| 63 | { | |
| 64 | .procname = "string_0001", | |
| 65 | .data = &test_data.string_0001, | |
| 66 | .maxlen = sizeof(test_data.string_0001), | |
| 67 | .mode = 0644, | |
| 68 | .proc_handler = proc_dostring, | |
| 69 | }, | |
| 70 | { } | |
| 71 | }; | |
| 72 | ||
| 73 | static struct ctl_table test_sysctl_table[] = { | |
| 74 | { | |
| 75 | .procname = "test_sysctl", | |
| 76 | .maxlen = 0, | |
| 77 | .mode = 0555, | |
| 78 | .child = test_table, | |
| 79 | }, | |
| 80 | { } | |
| 81 | }; | |
| 82 | ||
| 83 | static struct ctl_table test_sysctl_root_table[] = { | |
| 84 | { | |
| 85 | .procname = "debug", | |
| 86 | .maxlen = 0, | |
| 87 | .mode = 0555, | |
| 88 | .child = test_sysctl_table, | |
| 89 | }, | |
| 90 | { } | |
| 91 | }; | |
| 92 | ||
| 93 | static struct ctl_table_header *test_sysctl_header; | |
| 94 | ||
| 95 | static int __init test_sysctl_init(void) | |
| 96 | { | |
| 97 | test_sysctl_header = register_sysctl_table(test_sysctl_root_table); | |
| 98 | if (!test_sysctl_header) | |
| 99 | return -ENOMEM; | |
| 100 | return 0; | |
| 101 | } | |
| 102 | late_initcall(test_sysctl_init); | |
| 103 | ||
| 104 | static void __exit test_sysctl_exit(void) | |
| 105 | { | |
| 106 | if (test_sysctl_header) | |
| 107 | unregister_sysctl_table(test_sysctl_header); | |
| 108 | } | |
| 109 | ||
| 110 | module_exit(test_sysctl_exit); | |
| 111 | ||
| 112 | MODULE_AUTHOR("Luis R. Rodriguez <mcgrof@kernel.org>"); | |
| 113 | MODULE_LICENSE("GPL"); |