Release 4.11 net/netfilter/xt_bpf.c
/* Xtables module to match packets using a BPF filter.
* Copyright 2013 Google Inc.
* Written by Willem de Bruijn <willemb@google.com>
*
* 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/filter.h>
#include <linux/bpf.h>
#include <linux/netfilter/xt_bpf.h>
#include <linux/netfilter/x_tables.h>
MODULE_AUTHOR("Willem de Bruijn <willemb@google.com>");
MODULE_DESCRIPTION("Xtables: BPF filter match");
MODULE_LICENSE("GPL");
MODULE_ALIAS("ipt_bpf");
MODULE_ALIAS("ip6t_bpf");
static int __bpf_mt_check_bytecode(struct sock_filter *insns, __u16 len,
struct bpf_prog **ret)
{
struct sock_fprog_kern program;
program.len = len;
program.filter = insns;
if (bpf_prog_create(ret, &program)) {
pr_info("bpf: check failed: parse error\n");
return -EINVAL;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Willem de Bruijn | 58 | 96.67% | 2 | 50.00% |
| Alexei Starovoitov | 1 | 1.67% | 1 | 25.00% |
| Daniel Borkmann | 1 | 1.67% | 1 | 25.00% |
| Total | 60 | 100.00% | 4 | 100.00% |
static int __bpf_mt_check_fd(int fd, struct bpf_prog **ret)
{
struct bpf_prog *prog;
prog = bpf_prog_get_type(fd, BPF_PROG_TYPE_SOCKET_FILTER);
if (IS_ERR(prog))
return PTR_ERR(prog);
*ret = prog;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Willem de Bruijn | 50 | 100.00% | 1 | 100.00% |
| Total | 50 | 100.00% | 1 | 100.00% |
static int bpf_mt_check(const struct xt_mtchk_param *par)
{
struct xt_bpf_info *info = par->matchinfo;
return __bpf_mt_check_bytecode(info->bpf_program,
info->bpf_program_num_elem,
&info->filter);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Willem de Bruijn | 38 | 100.00% | 1 | 100.00% |
| Total | 38 | 100.00% | 1 | 100.00% |
static int bpf_mt_check_v1(const struct xt_mtchk_param *par)
{
struct xt_bpf_info_v1 *info = par->matchinfo;
if (info->mode == XT_BPF_MODE_BYTECODE)
return __bpf_mt_check_bytecode(info->bpf_program,
info->bpf_program_num_elem,
&info->filter);
else if (info->mode == XT_BPF_MODE_FD_PINNED ||
info->mode == XT_BPF_MODE_FD_ELF)
return __bpf_mt_check_fd(info->fd, &info->filter);
else
return -EINVAL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Willem de Bruijn | 79 | 100.00% | 1 | 100.00% |
| Total | 79 | 100.00% | 1 | 100.00% |
static bool bpf_mt(const struct sk_buff *skb, struct xt_action_param *par)
{
const struct xt_bpf_info *info = par->matchinfo;
return BPF_PROG_RUN(info->filter, skb);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Willem de Bruijn | 36 | 97.30% | 1 | 50.00% |
| Alexei Starovoitov | 1 | 2.70% | 1 | 50.00% |
| Total | 37 | 100.00% | 2 | 100.00% |
static bool bpf_mt_v1(const struct sk_buff *skb, struct xt_action_param *par)
{
const struct xt_bpf_info_v1 *info = par->matchinfo;
return !!bpf_prog_run_save_cb(info->filter, (struct sk_buff *) skb);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Willem de Bruijn | 44 | 100.00% | 1 | 100.00% |
| Total | 44 | 100.00% | 1 | 100.00% |
static void bpf_mt_destroy(const struct xt_mtdtor_param *par)
{
const struct xt_bpf_info *info = par->matchinfo;
bpf_prog_destroy(info->filter);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Willem de Bruijn | 28 | 96.55% | 1 | 50.00% |
| Alexei Starovoitov | 1 | 3.45% | 1 | 50.00% |
| Total | 29 | 100.00% | 2 | 100.00% |
static void bpf_mt_destroy_v1(const struct xt_mtdtor_param *par)
{
const struct xt_bpf_info_v1 *info = par->matchinfo;
bpf_prog_destroy(info->filter);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Willem de Bruijn | 29 | 100.00% | 1 | 100.00% |
| Total | 29 | 100.00% | 1 | 100.00% |
static struct xt_match bpf_mt_reg[] __read_mostly = {
{
.name = "bpf",
.revision = 0,
.family = NFPROTO_UNSPEC,
.checkentry = bpf_mt_check,
.match = bpf_mt,
.destroy = bpf_mt_destroy,
.matchsize = sizeof(struct xt_bpf_info),
.usersize = offsetof(struct xt_bpf_info, filter),
.me = THIS_MODULE,
},
{
.name = "bpf",
.revision = 1,
.family = NFPROTO_UNSPEC,
.checkentry = bpf_mt_check_v1,
.match = bpf_mt_v1,
.destroy = bpf_mt_destroy_v1,
.matchsize = sizeof(struct xt_bpf_info_v1),
.usersize = offsetof(struct xt_bpf_info_v1, filter),
.me = THIS_MODULE,
},
};
static int __init bpf_mt_init(void)
{
return xt_register_matches(bpf_mt_reg, ARRAY_SIZE(bpf_mt_reg));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Willem de Bruijn | 20 | 100.00% | 2 | 100.00% |
| Total | 20 | 100.00% | 2 | 100.00% |
static void __exit bpf_mt_exit(void)
{
xt_unregister_matches(bpf_mt_reg, ARRAY_SIZE(bpf_mt_reg));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Willem de Bruijn | 19 | 100.00% | 2 | 100.00% |
| Total | 19 | 100.00% | 2 | 100.00% |
module_init(bpf_mt_init);
module_exit(bpf_mt_exit);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Willem de Bruijn | 578 | 99.31% | 3 | 60.00% |
| Alexei Starovoitov | 3 | 0.52% | 1 | 20.00% |
| Daniel Borkmann | 1 | 0.17% | 1 | 20.00% |
| Total | 582 | 100.00% | 5 | 100.00% |
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.