cregit-Linux how code gets into the kernel

Release 4.14 net/netfilter/xt_cpu.c

Directory: net/netfilter
/* Kernel module to match running CPU */

/*
 * Might be used to distribute connections on several daemons, if
 * RPS (Remote Packet Steering) is enabled or NIC is multiqueue capable,
 * each RX queue IRQ affined to one CPU (1:1 mapping)
 *
 */

/* (C) 2010 Eric Dumazet
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/netfilter/xt_cpu.h>
#include <linux/netfilter/x_tables.h>

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Eric Dumazet <eric.dumazet@gmail.com>");
MODULE_DESCRIPTION("Xtables: CPU match");
MODULE_ALIAS("ipt_cpu");
MODULE_ALIAS("ip6t_cpu");


static int cpu_mt_check(const struct xt_mtchk_param *par) { const struct xt_cpu_info *info = par->matchinfo; if (info->invert & ~1) return -EINVAL; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Eric Dumazet38100.00%1100.00%
Total38100.00%1100.00%


static bool cpu_mt(const struct sk_buff *skb, struct xt_action_param *par) { const struct xt_cpu_info *info = par->matchinfo; return (info->cpu == smp_processor_id()) ^ info->invert; }

Contributors

PersonTokensPropCommitsCommitProp
Eric Dumazet41100.00%1100.00%
Total41100.00%1100.00%

static struct xt_match cpu_mt_reg __read_mostly = { .name = "cpu", .revision = 0, .family = NFPROTO_UNSPEC, .checkentry = cpu_mt_check, .match = cpu_mt, .matchsize = sizeof(struct xt_cpu_info), .me = THIS_MODULE, };
static int __init cpu_mt_init(void) { return xt_register_match(&cpu_mt_reg); }

Contributors

PersonTokensPropCommitsCommitProp
Eric Dumazet16100.00%1100.00%
Total16100.00%1100.00%


static void __exit cpu_mt_exit(void) { xt_unregister_match(&cpu_mt_reg); }

Contributors

PersonTokensPropCommitsCommitProp
Eric Dumazet15100.00%1100.00%
Total15100.00%1100.00%

module_init(cpu_mt_init); module_exit(cpu_mt_exit);

Overall Contributors

PersonTokensPropCommitsCommitProp
Eric Dumazet19795.17%150.00%
Jan Engelhardt104.83%150.00%
Total207100.00%2100.00%
Directory: net/netfilter
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