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author | David S. Miller <davem@davemloft.net> | 2010-08-02 22:07:58 (GMT) |
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committer | David S. Miller <davem@davemloft.net> | 2010-08-02 22:07:58 (GMT) |
commit | 83bf2e4089bebc2c7fd14a79de5954b26fe8d4af (patch) | |
tree | ab2cb1f229ba4c2d7236406c997e41a223daf74d /net/netfilter/xt_cpu.c | |
parent | de38483010bae523f533bb6bf9f7b7353772f6eb (diff) | |
parent | 6661481d5a8975657742c7ed40ae16bdaa7d0a6e (diff) | |
download | linux-fsl-qoriq-83bf2e4089bebc2c7fd14a79de5954b26fe8d4af.tar.xz |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-next-2.6
Diffstat (limited to 'net/netfilter/xt_cpu.c')
-rw-r--r-- | net/netfilter/xt_cpu.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/net/netfilter/xt_cpu.c b/net/netfilter/xt_cpu.c new file mode 100644 index 0000000..b39db8a --- /dev/null +++ b/net/netfilter/xt_cpu.c @@ -0,0 +1,63 @@ +/* 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"); + +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; +} + +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; +} + +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); +} + +static void __exit cpu_mt_exit(void) +{ + xt_unregister_match(&cpu_mt_reg); +} + +module_init(cpu_mt_init); +module_exit(cpu_mt_exit); |