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![Tonghao Zhang](/assets/img/avatar_default.png)
Cc: Luis Chamberlain <mcgrof@kernel.org> Cc: Kees Cook <keescook@chromium.org> Cc: Iurii Zaikin <yzaikin@google.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jakub Kicinski <kuba@kernel.org> Cc: Paolo Abeni <pabeni@redhat.com> Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org> Cc: David Ahern <dsahern@kernel.org> Cc: Simon Horman <horms@verge.net.au> Cc: Julian Anastasov <ja@ssi.bg> Cc: Pablo Neira Ayuso <pablo@netfilter.org> Cc: Jozsef Kadlecsik <kadlec@netfilter.org> Cc: Florian Westphal <fw@strlen.de> Cc: Shuah Khan <shuah@kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Eric Dumazet <edumazet@google.com> Cc: Lorenz Bauer <lmb@cloudflare.com> Cc: Akhmat Karakotov <hmukos@yandex-team.ru> Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
189 lines
4.6 KiB
C
189 lines
4.6 KiB
C
/*
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* proc sysctl test driver
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*
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* Copyright (C) 2017 Luis R. Rodriguez <mcgrof@kernel.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or at your option any
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* later version; or, when distributed separately from the Linux kernel or
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* when incorporated into other software packages, subject to the following
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* license:
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of copyleft-next (version 0.3.1 or later) as published
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* at http://copyleft-next.org/.
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*/
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/*
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* This module provides an interface to the proc sysctl interfaces. This
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* driver requires CONFIG_PROC_SYSCTL. It will not normally be loaded by the
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* system unless explicitly requested by name. You can also build this driver
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* into your kernel.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/init.h>
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#include <linux/list.h>
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#include <linux/module.h>
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#include <linux/printk.h>
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#include <linux/fs.h>
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#include <linux/miscdevice.h>
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#include <linux/slab.h>
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#include <linux/uaccess.h>
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#include <linux/async.h>
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#include <linux/delay.h>
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#include <linux/vmalloc.h>
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static int i_zero;
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static int i_one_hundred = 100;
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static int match_int_ok = 1;
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struct test_sysctl_data {
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int int_0001;
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int int_0002;
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int int_0003[4];
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int boot_int;
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unsigned int uint_0001;
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char string_0001[65];
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#define SYSCTL_TEST_BITMAP_SIZE 65536
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unsigned long *bitmap_0001;
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};
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static struct test_sysctl_data test_data = {
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.int_0001 = 60,
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.int_0002 = 1,
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.int_0003[0] = 0,
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.int_0003[1] = 1,
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.int_0003[2] = 2,
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.int_0003[3] = 3,
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.boot_int = 0,
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.uint_0001 = 314,
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.string_0001 = "(none)",
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};
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/* These are all under /proc/sys/debug/test_sysctl/ */
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static struct ctl_table test_table[] = {
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{
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.procname = "int_0001",
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.data = &test_data.int_0001,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec_minmax,
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.extra1 = &i_zero,
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.extra2 = &i_one_hundred,
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},
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{
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.procname = "int_0002",
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.data = &test_data.int_0002,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec,
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},
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{
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.procname = "int_0003",
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.data = &test_data.int_0003,
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.maxlen = sizeof(test_data.int_0003),
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.mode = 0644,
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.proc_handler = proc_dointvec,
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},
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{
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.procname = "match_int",
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.data = &match_int_ok,
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.maxlen = sizeof(match_int_ok),
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.mode = 0444,
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.proc_handler = proc_dointvec,
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},
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{
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.procname = "boot_int",
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.data = &test_data.boot_int,
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.maxlen = sizeof(test_data.boot_int),
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.mode = 0644,
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.proc_handler = proc_dointvec,
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.extra1 = SYSCTL_ZERO,
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.extra2 = SYSCTL_ONE,
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},
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{
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.procname = "uint_0001",
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.data = &test_data.uint_0001,
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.maxlen = sizeof(unsigned int),
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.mode = 0644,
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.proc_handler = proc_douintvec,
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},
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{
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.procname = "string_0001",
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.data = &test_data.string_0001,
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.maxlen = sizeof(test_data.string_0001),
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.mode = 0644,
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.proc_handler = proc_dostring,
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},
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{
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.procname = "bitmap_0001",
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.data = &test_data.bitmap_0001,
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.maxlen = SYSCTL_TEST_BITMAP_SIZE,
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.mode = 0644,
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.proc_handler = proc_do_large_bitmap,
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},
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{ }
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};
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static struct ctl_table_header *test_sysctl_header;
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static int __init test_sysctl_init(void)
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{
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int i;
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struct {
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int defined;
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int wanted;
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} match_int[] = {
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{.defined = *(int *)SYSCTL_ZERO, .wanted = 0},
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{.defined = *(int *)SYSCTL_ONE, .wanted = 1},
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{.defined = *(int *)SYSCTL_TWO, .wanted = 2},
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{.defined = *(int *)SYSCTL_THREE, .wanted = 3},
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{.defined = *(int *)SYSCTL_FOUR, .wanted = 4},
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{.defined = *(int *)SYSCTL_ONE_HUNDRED, .wanted = 100},
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{.defined = *(int *)SYSCTL_TWO_HUNDRED, .wanted = 200},
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{.defined = *(int *)SYSCTL_ONE_THOUSAND, .wanted = 1000},
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{.defined = *(int *)SYSCTL_THREE_THOUSAND, .wanted = 3000},
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{.defined = *(int *)SYSCTL_INT_MAX, .wanted = INT_MAX},
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{.defined = *(int *)SYSCTL_MAXOLDUID, .wanted = 65535},
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{.defined = *(int *)SYSCTL_NEG_ONE, .wanted = -1},
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};
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for (i = 0; i < ARRAY_SIZE(match_int); i++)
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if (match_int[i].defined != match_int[i].wanted)
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match_int_ok = 0;
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test_data.bitmap_0001 = kzalloc(SYSCTL_TEST_BITMAP_SIZE/8, GFP_KERNEL);
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if (!test_data.bitmap_0001)
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return -ENOMEM;
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test_sysctl_header = register_sysctl("debug/test_sysctl", test_table);
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if (!test_sysctl_header) {
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kfree(test_data.bitmap_0001);
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return -ENOMEM;
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}
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return 0;
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}
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module_init(test_sysctl_init);
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static void __exit test_sysctl_exit(void)
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{
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kfree(test_data.bitmap_0001);
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if (test_sysctl_header)
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unregister_sysctl_table(test_sysctl_header);
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}
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module_exit(test_sysctl_exit);
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MODULE_AUTHOR("Luis R. Rodriguez <mcgrof@kernel.org>");
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MODULE_LICENSE("GPL");
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