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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/net/ipv4/netfilter/arptable_filter.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/net/ipv4/netfilter/arptable_filter.c')
-rw-r--r-- | kernel/net/ipv4/netfilter/arptable_filter.c | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/kernel/net/ipv4/netfilter/arptable_filter.c b/kernel/net/ipv4/netfilter/arptable_filter.c new file mode 100644 index 000000000..93876d031 --- /dev/null +++ b/kernel/net/ipv4/netfilter/arptable_filter.c @@ -0,0 +1,91 @@ +/* + * Filtering ARP tables module. + * + * Copyright (C) 2002 David S. Miller (davem@redhat.com) + * + */ + +#include <linux/module.h> +#include <linux/netfilter/x_tables.h> +#include <linux/netfilter_arp/arp_tables.h> +#include <linux/slab.h> + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("David S. Miller <davem@redhat.com>"); +MODULE_DESCRIPTION("arptables filter table"); + +#define FILTER_VALID_HOOKS ((1 << NF_ARP_IN) | (1 << NF_ARP_OUT) | \ + (1 << NF_ARP_FORWARD)) + +static const struct xt_table packet_filter = { + .name = "filter", + .valid_hooks = FILTER_VALID_HOOKS, + .me = THIS_MODULE, + .af = NFPROTO_ARP, + .priority = NF_IP_PRI_FILTER, +}; + +/* The work comes in here from netfilter.c */ +static unsigned int +arptable_filter_hook(const struct nf_hook_ops *ops, struct sk_buff *skb, + const struct nf_hook_state *state) +{ + const struct net *net = dev_net(state->in ? state->in : state->out); + + return arpt_do_table(skb, ops->hooknum, state, + net->ipv4.arptable_filter); +} + +static struct nf_hook_ops *arpfilter_ops __read_mostly; + +static int __net_init arptable_filter_net_init(struct net *net) +{ + struct arpt_replace *repl; + + repl = arpt_alloc_initial_table(&packet_filter); + if (repl == NULL) + return -ENOMEM; + net->ipv4.arptable_filter = + arpt_register_table(net, &packet_filter, repl); + kfree(repl); + return PTR_ERR_OR_ZERO(net->ipv4.arptable_filter); +} + +static void __net_exit arptable_filter_net_exit(struct net *net) +{ + arpt_unregister_table(net->ipv4.arptable_filter); +} + +static struct pernet_operations arptable_filter_net_ops = { + .init = arptable_filter_net_init, + .exit = arptable_filter_net_exit, +}; + +static int __init arptable_filter_init(void) +{ + int ret; + + ret = register_pernet_subsys(&arptable_filter_net_ops); + if (ret < 0) + return ret; + + arpfilter_ops = xt_hook_link(&packet_filter, arptable_filter_hook); + if (IS_ERR(arpfilter_ops)) { + ret = PTR_ERR(arpfilter_ops); + goto cleanup_table; + } + return ret; + +cleanup_table: + unregister_pernet_subsys(&arptable_filter_net_ops); + return ret; +} + +static void __exit arptable_filter_fini(void) +{ + xt_hook_unlink(&packet_filter, arpfilter_ops); + unregister_pernet_subsys(&arptable_filter_net_ops); +} + +module_init(arptable_filter_init); +module_exit(arptable_filter_fini); |