cregit-Linux how code gets into the kernel

Release 4.15 net/sched/em_ipset.c

Directory: net/sched
/*
 * net/sched/em_ipset.c ipset ematch
 *
 * Copyright (c) 2012 Florian Westphal <fw@strlen.de>
 *
 * 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/gfp.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/skbuff.h>
#include <linux/netfilter/xt_set.h>
#include <linux/ipv6.h>
#include <net/ip.h>
#include <net/pkt_cls.h>


static int em_ipset_change(struct net *net, void *data, int data_len, struct tcf_ematch *em) { struct xt_set_info *set = data; ip_set_id_t index; if (data_len != sizeof(*set)) return -EINVAL; index = ip_set_nfnl_get_byindex(net, set->index); if (index == IPSET_INVALID_ID) return -ENOENT; em->datalen = sizeof(*set); em->data = (unsigned long)kmemdup(data, em->datalen, GFP_KERNEL); if (em->data) return 0; ip_set_nfnl_put(net, index); return -ENOMEM; }

Contributors

PersonTokensPropCommitsCommitProp
Florian Westphal11194.87%133.33%
Vitaly E. Lavrov43.42%133.33%
John Fastabend21.71%133.33%
Total117100.00%3100.00%


static void em_ipset_destroy(struct tcf_ematch *em) { const struct xt_set_info *set = (const void *) em->data; if (set) { ip_set_nfnl_put(em->net, set->index); kfree((void *) em->data); } }

Contributors

PersonTokensPropCommitsCommitProp
Florian Westphal5092.59%133.33%
John Fastabend23.70%133.33%
Vitaly E. Lavrov23.70%133.33%
Total54100.00%3100.00%


static int em_ipset_match(struct sk_buff *skb, struct tcf_ematch *em, struct tcf_pkt_info *info) { struct ip_set_adt_opt opt; struct xt_action_param acpar; const struct xt_set_info *set = (const void *) em->data; struct net_device *dev, *indev = NULL; struct nf_hook_state state = { .net = em->net, }; int ret, network_offset; switch (tc_skb_protocol(skb)) { case htons(ETH_P_IP): state.pf = NFPROTO_IPV4; if (!pskb_network_may_pull(skb, sizeof(struct iphdr))) return 0; acpar.thoff = ip_hdrlen(skb); break; case htons(ETH_P_IPV6): state.pf = NFPROTO_IPV6; if (!pskb_network_may_pull(skb, sizeof(struct ipv6hdr))) return 0; /* doesn't call ipv6_find_hdr() because ipset doesn't use thoff, yet */ acpar.thoff = sizeof(struct ipv6hdr); break; default: return 0; } opt.family = state.pf; opt.dim = set->dim; opt.flags = set->flags; opt.cmdflags = 0; opt.ext.timeout = ~0u; network_offset = skb_network_offset(skb); skb_pull(skb, network_offset); dev = skb->dev; rcu_read_lock(); if (skb->skb_iif) indev = dev_get_by_index_rcu(em->net, skb->skb_iif); state.in = indev ? indev : dev; state.out = dev; acpar.state = &state; ret = ip_set_test(set->index, skb, &acpar, &opt); rcu_read_unlock(); skb_push(skb, network_offset); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Florian Westphal26287.63%116.67%
Pablo Neira Ayuso289.36%116.67%
Eric W. Biedermann41.34%233.33%
Jiri Pirko31.00%116.67%
Jozsef Kadlecsik20.67%116.67%
Total299100.00%6100.00%

static struct tcf_ematch_ops em_ipset_ops = { .kind = TCF_EM_IPSET, .change = em_ipset_change, .destroy = em_ipset_destroy, .match = em_ipset_match, .owner = THIS_MODULE, .link = LIST_HEAD_INIT(em_ipset_ops.link) };
static int __init init_em_ipset(void) { return tcf_em_register(&em_ipset_ops); }

Contributors

PersonTokensPropCommitsCommitProp
Florian Westphal16100.00%1100.00%
Total16100.00%1100.00%


static void __exit exit_em_ipset(void) { tcf_em_unregister(&em_ipset_ops); }

Contributors

PersonTokensPropCommitsCommitProp
Florian Westphal15100.00%1100.00%
Total15100.00%1100.00%

MODULE_LICENSE("GPL"); MODULE_AUTHOR("Florian Westphal <fw@strlen.de>"); MODULE_DESCRIPTION("TC extended match for IP sets"); module_init(init_em_ipset); module_exit(exit_em_ipset); MODULE_ALIAS_TCF_EMATCH(TCF_EM_IPSET);

Overall Contributors

PersonTokensPropCommitsCommitProp
Florian Westphal55592.19%112.50%
Pablo Neira Ayuso284.65%112.50%
Vitaly E. Lavrov61.00%112.50%
Eric W. Biedermann40.66%225.00%
John Fastabend40.66%112.50%
Jiri Pirko30.50%112.50%
Jozsef Kadlecsik20.33%112.50%
Total602100.00%8100.00%
Directory: net/sched
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