git://bbs.cooldavid.org / net-next-2.6.git / blame
| Commit | Line | Data |
|---|---|---|
| e8648a1f ED |
1 | /* Kernel module to match running CPU */ |
| 2 | ||
| 3 | /* | |
| 4 | * Might be used to distribute connections on several daemons, if | |
| 5 | * RPS (Remote Packet Steering) is enabled or NIC is multiqueue capable, | |
| 6 | * each RX queue IRQ affined to one CPU (1:1 mapping) | |
| 7 | * | |
| 8 | */ | |
| 9 | ||
| 10 | /* (C) 2010 Eric Dumazet | |
| 11 | * | |
| 12 | * This program is free software; you can redistribute it and/or modify | |
| 13 | * it under the terms of the GNU General Public License version 2 as | |
| 14 | * published by the Free Software Foundation. | |
| 15 | */ | |
| 16 | ||
| 17 | #include <linux/module.h> | |
| 18 | #include <linux/skbuff.h> | |
| 19 | #include <linux/netfilter/xt_cpu.h> | |
| 20 | #include <linux/netfilter/x_tables.h> | |
| 21 | ||
| 22 | MODULE_LICENSE("GPL"); | |
| 23 | MODULE_AUTHOR("Eric Dumazet <eric.dumazet@gmail.com>"); | |
| 24 | MODULE_DESCRIPTION("Xtables: CPU match"); | |
| 25 | ||
| 26 | static int cpu_mt_check(const struct xt_mtchk_param *par) | |
| 27 | { | |
| 28 | const struct xt_cpu_info *info = par->matchinfo; | |
| 29 | ||
| 30 | if (info->invert & ~1) | |
| 31 | return -EINVAL; | |
| 32 | return 0; | |
| 33 | } | |
| 34 | ||
| 35 | static bool cpu_mt(const struct sk_buff *skb, struct xt_action_param *par) | |
| 36 | { | |
| 37 | const struct xt_cpu_info *info = par->matchinfo; | |
| 38 | ||
| 39 | return (info->cpu == smp_processor_id()) ^ info->invert; | |
| 40 | } | |
| 41 | ||
| 42 | static struct xt_match cpu_mt_reg __read_mostly = { | |
| 43 | .name = "cpu", | |
| 44 | .revision = 0, | |
| 45 | .family = NFPROTO_UNSPEC, | |
| 46 | .checkentry = cpu_mt_check, | |
| 47 | .match = cpu_mt, | |
| 48 | .matchsize = sizeof(struct xt_cpu_info), | |
| 49 | .me = THIS_MODULE, | |
| 50 | }; | |
| 51 | ||
| 52 | static int __init cpu_mt_init(void) | |
| 53 | { | |
| 54 | return xt_register_match(&cpu_mt_reg); | |
| 55 | } | |
| 56 | ||
| 57 | static void __exit cpu_mt_exit(void) | |
| 58 | { | |
| 59 | xt_unregister_match(&cpu_mt_reg); | |
| 60 | } | |
| 61 | ||
| 62 | module_init(cpu_mt_init); | |
| 63 | module_exit(cpu_mt_exit); |