Release 4.14 net/netfilter/nf_tables_api.c
/*
* Copyright (c) 2007-2009 Patrick McHardy <kaber@trash.net>
*
* 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.
*
* Development of this code funded by Astaro AG (http://www.astaro.com/)
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/skbuff.h>
#include <linux/netlink.h>
#include <linux/vmalloc.h>
#include <linux/netfilter.h>
#include <linux/netfilter/nfnetlink.h>
#include <linux/netfilter/nf_tables.h>
#include <net/netfilter/nf_tables_core.h>
#include <net/netfilter/nf_tables.h>
#include <net/net_namespace.h>
#include <net/sock.h>
static LIST_HEAD(nf_tables_expressions);
static LIST_HEAD(nf_tables_objects);
/**
* nft_register_afinfo - register nf_tables address family info
*
* @afi: address family info to register
*
* Register the address family for use with nf_tables. Returns zero on
* success or a negative errno code otherwise.
*/
int nft_register_afinfo(struct net *net, struct nft_af_info *afi)
{
INIT_LIST_HEAD(&afi->tables);
nfnl_lock(NFNL_SUBSYS_NFTABLES);
list_add_tail_rcu(&afi->list, &net->nft.af_info);
nfnl_unlock(NFNL_SUBSYS_NFTABLES);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 40 | 78.43% | 1 | 33.33% |
| Pablo Neira Ayuso | 11 | 21.57% | 2 | 66.67% |
| Total | 51 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL_GPL(nft_register_afinfo);
static void __nft_release_afinfo(struct net *net, struct nft_af_info *afi);
/**
* nft_unregister_afinfo - unregister nf_tables address family info
*
* @afi: address family info to unregister
*
* Unregister the address family for use with nf_tables.
*/
void nft_unregister_afinfo(struct net *net, struct nft_af_info *afi)
{
nfnl_lock(NFNL_SUBSYS_NFTABLES);
__nft_release_afinfo(net, afi);
list_del_rcu(&afi->list);
nfnl_unlock(NFNL_SUBSYS_NFTABLES);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 27 | 67.50% | 1 | 33.33% |
| Pablo Neira Ayuso | 13 | 32.50% | 2 | 66.67% |
| Total | 40 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL_GPL(nft_unregister_afinfo);
static struct nft_af_info *nft_afinfo_lookup(struct net *net, int family)
{
struct nft_af_info *afi;
list_for_each_entry(afi, &net->nft.af_info, list) {
if (afi->family == family)
return afi;
}
return NULL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 39 | 86.67% | 1 | 50.00% |
| Pablo Neira Ayuso | 6 | 13.33% | 1 | 50.00% |
| Total | 45 | 100.00% | 2 | 100.00% |
static struct nft_af_info *
nf_tables_afinfo_lookup(struct net *net, int family, bool autoload)
{
struct nft_af_info *afi;
afi = nft_afinfo_lookup(net, family);
if (afi != NULL)
return afi;
#ifdef CONFIG_MODULES
if (autoload) {
nfnl_unlock(NFNL_SUBSYS_NFTABLES);
request_module("nft-afinfo-%u", family);
nfnl_lock(NFNL_SUBSYS_NFTABLES);
afi = nft_afinfo_lookup(net, family);
if (afi != NULL)
return ERR_PTR(-EAGAIN);
}
#endif
return ERR_PTR(-EAFNOSUPPORT);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 90 | 90.91% | 1 | 50.00% |
| Pablo Neira Ayuso | 9 | 9.09% | 1 | 50.00% |
| Total | 99 | 100.00% | 2 | 100.00% |
static void nft_ctx_init(struct nft_ctx *ctx,
struct net *net,
const struct sk_buff *skb,
const struct nlmsghdr *nlh,
struct nft_af_info *afi,
struct nft_table *table,
struct nft_chain *chain,
const struct nlattr * const *nla)
{
ctx->net = net;
ctx->afi = afi;
ctx->table = table;
ctx->chain = chain;
ctx->nla = nla;
ctx->portid = NETLINK_CB(skb).portid;
ctx->report = nlmsg_report(nlh);
ctx->seq = nlh->nlmsg_seq;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 109 | 100.00% | 3 | 100.00% |
| Total | 109 | 100.00% | 3 | 100.00% |
static struct nft_trans *nft_trans_alloc_gfp(const struct nft_ctx *ctx,
int msg_type, u32 size, gfp_t gfp)
{
struct nft_trans *trans;
trans = kzalloc(sizeof(struct nft_trans) + size, gfp);
if (trans == NULL)
return NULL;
trans->msg_type = msg_type;
trans->ctx = *ctx;
return trans;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 68 | 100.00% | 4 | 100.00% |
| Total | 68 | 100.00% | 4 | 100.00% |
static struct nft_trans *nft_trans_alloc(const struct nft_ctx *ctx,
int msg_type, u32 size)
{
return nft_trans_alloc_gfp(ctx, msg_type, size, GFP_KERNEL);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 32 | 100.00% | 1 | 100.00% |
| Total | 32 | 100.00% | 1 | 100.00% |
static void nft_trans_destroy(struct nft_trans *trans)
{
list_del(&trans->list);
kfree(trans);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 24 | 100.00% | 1 | 100.00% |
| Total | 24 | 100.00% | 1 | 100.00% |
static int nf_tables_register_hooks(struct net *net,
const struct nft_table *table,
struct nft_chain *chain,
unsigned int hook_nops)
{
if (table->flags & NFT_TABLE_F_DORMANT ||
!nft_is_base_chain(chain))
return 0;
return nf_register_net_hooks(net, nft_base_chain(chain)->ops,
hook_nops);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 36 | 62.07% | 4 | 66.67% |
| Arturo Borrero Gonzalez | 19 | 32.76% | 1 | 16.67% |
| Eric W. Biedermann | 3 | 5.17% | 1 | 16.67% |
| Total | 58 | 100.00% | 6 | 100.00% |
static void nf_tables_unregister_hooks(struct net *net,
const struct nft_table *table,
struct nft_chain *chain,
unsigned int hook_nops)
{
if (table->flags & NFT_TABLE_F_DORMANT ||
!nft_is_base_chain(chain))
return;
nf_unregister_net_hooks(net, nft_base_chain(chain)->ops, hook_nops);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 38 | 69.09% | 3 | 75.00% |
| Arturo Borrero Gonzalez | 17 | 30.91% | 1 | 25.00% |
| Total | 55 | 100.00% | 4 | 100.00% |
static int nft_trans_table_add(struct nft_ctx *ctx, int msg_type)
{
struct nft_trans *trans;
trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_table));
if (trans == NULL)
return -ENOMEM;
if (msg_type == NFT_MSG_NEWTABLE)
nft_activate_next(ctx->net, ctx->table);
list_add_tail(&trans->list, &ctx->net->nft.commit_list);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 51 | 62.96% | 1 | 33.33% |
| Patrick McHardy | 23 | 28.40% | 1 | 33.33% |
| Pablo Neira Ayuso | 7 | 8.64% | 1 | 33.33% |
| Total | 81 | 100.00% | 3 | 100.00% |
static int nft_deltable(struct nft_ctx *ctx)
{
int err;
err = nft_trans_table_add(ctx, NFT_MSG_DELTABLE);
if (err < 0)
return err;
nft_deactivate_next(ctx->net, ctx->table);
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 20 | 43.48% | 1 | 25.00% |
| Patrick McHardy | 17 | 36.96% | 1 | 25.00% |
| Pablo Neira Ayuso | 9 | 19.57% | 2 | 50.00% |
| Total | 46 | 100.00% | 4 | 100.00% |
static int nft_trans_chain_add(struct nft_ctx *ctx, int msg_type)
{
struct nft_trans *trans;
trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_chain));
if (trans == NULL)
return -ENOMEM;
if (msg_type == NFT_MSG_NEWCHAIN)
nft_activate_next(ctx->net, ctx->chain);
list_add_tail(&trans->list, &ctx->net->nft.commit_list);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 64 | 79.01% | 1 | 33.33% |
| Pablo Neira Ayuso | 17 | 20.99% | 2 | 66.67% |
| Total | 81 | 100.00% | 3 | 100.00% |
static int nft_delchain(struct nft_ctx *ctx)
{
int err;
err = nft_trans_chain_add(ctx, NFT_MSG_DELCHAIN);
if (err < 0)
return err;
ctx->table->use--;
nft_deactivate_next(ctx->net, ctx->chain);
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 31 | 58.49% | 1 | 33.33% |
| Pablo Neira Ayuso | 22 | 41.51% | 2 | 66.67% |
| Total | 53 | 100.00% | 3 | 100.00% |
static int
nf_tables_delrule_deactivate(struct nft_ctx *ctx, struct nft_rule *rule)
{
/* You cannot delete the same rule twice */
if (nft_is_active_next(ctx->net, rule)) {
nft_deactivate_next(ctx->net, rule);
ctx->chain->use--;
return 0;
}
return -ENOENT;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 34 | 64.15% | 1 | 16.67% |
| Patrick McHardy | 11 | 20.75% | 1 | 16.67% |
| Pablo Neira Ayuso | 5 | 9.43% | 3 | 50.00% |
| Tomasz Bursztyka | 3 | 5.66% | 1 | 16.67% |
| Total | 53 | 100.00% | 6 | 100.00% |
static struct nft_trans *nft_trans_rule_add(struct nft_ctx *ctx, int msg_type,
struct nft_rule *rule)
{
struct nft_trans *trans;
trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_rule));
if (trans == NULL)
return NULL;
if (msg_type == NFT_MSG_NEWRULE && ctx->nla[NFTA_RULE_ID] != NULL) {
nft_trans_rule_id(trans) =
ntohl(nla_get_be32(ctx->nla[NFTA_RULE_ID]));
}
nft_trans_rule(trans) = rule;
list_add_tail(&trans->list, &ctx->net->nft.commit_list);
return trans;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 43 | 38.39% | 1 | 20.00% |
| Pablo Neira Ayuso | 42 | 37.50% | 3 | 60.00% |
| Patrick McHardy | 27 | 24.11% | 1 | 20.00% |
| Total | 112 | 100.00% | 5 | 100.00% |
static int nft_delrule(struct nft_ctx *ctx, struct nft_rule *rule)
{
struct nft_trans *trans;
int err;
trans = nft_trans_rule_add(ctx, NFT_MSG_DELRULE, rule);
if (trans == NULL)
return -ENOMEM;
err = nf_tables_delrule_deactivate(ctx, rule);
if (err < 0) {
nft_trans_destroy(trans);
return err;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 49 | 67.12% | 1 | 33.33% |
| Patrick McHardy | 21 | 28.77% | 1 | 33.33% |
| Pablo Neira Ayuso | 3 | 4.11% | 1 | 33.33% |
| Total | 73 | 100.00% | 3 | 100.00% |
static int nft_delrule_by_chain(struct nft_ctx *ctx)
{
struct nft_rule *rule;
int err;
list_for_each_entry(rule, &ctx->chain->rules, list) {
err = nft_delrule(ctx, rule);
if (err < 0)
return err;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 28 | 56.00% | 1 | 33.33% |
| Arturo Borrero Gonzalez | 19 | 38.00% | 1 | 33.33% |
| Pablo Neira Ayuso | 3 | 6.00% | 1 | 33.33% |
| Total | 50 | 100.00% | 3 | 100.00% |
static int nft_trans_set_add(struct nft_ctx *ctx, int msg_type,
struct nft_set *set)
{
struct nft_trans *trans;
trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_set));
if (trans == NULL)
return -ENOMEM;
if (msg_type == NFT_MSG_NEWSET && ctx->nla[NFTA_SET_ID] != NULL) {
nft_trans_set_id(trans) =
ntohl(nla_get_be32(ctx->nla[NFTA_SET_ID]));
nft_activate_next(ctx->net, set);
}
nft_trans_set(trans) = set;
list_add_tail(&trans->list, &ctx->net->nft.commit_list);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 73 | 60.83% | 1 | 25.00% |
| Patrick McHardy | 39 | 32.50% | 1 | 25.00% |
| Pablo Neira Ayuso | 8 | 6.67% | 2 | 50.00% |
| Total | 120 | 100.00% | 4 | 100.00% |
static int nft_delset(struct nft_ctx *ctx, struct nft_set *set)
{
int err;
err = nft_trans_set_add(ctx, NFT_MSG_DELSET, set);
if (err < 0)
return err;
nft_deactivate_next(ctx->net, set);
ctx->table->use--;
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 32 | 55.17% | 1 | 33.33% |
| Patrick McHardy | 21 | 36.21% | 1 | 33.33% |
| Pablo Neira Ayuso | 5 | 8.62% | 1 | 33.33% |
| Total | 58 | 100.00% | 3 | 100.00% |
static int nft_trans_obj_add(struct nft_ctx *ctx, int msg_type,
struct nft_object *obj)
{
struct nft_trans *trans;
trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_obj));
if (trans == NULL)
return -ENOMEM;
if (msg_type == NFT_MSG_NEWOBJ)
nft_activate_next(ctx->net, obj);
nft_trans_obj(trans) = obj;
list_add_tail(&trans->list, &ctx->net->nft.commit_list);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 91 | 100.00% | 1 | 100.00% |
| Total | 91 | 100.00% | 1 | 100.00% |
static int nft_delobj(struct nft_ctx *ctx, struct nft_object *obj)
{
int err;
err = nft_trans_obj_add(ctx, NFT_MSG_DELOBJ, obj);
if (err < 0)
return err;
nft_deactivate_next(ctx->net, obj);
ctx->table->use--;
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 58 | 100.00% | 1 | 100.00% |
| Total | 58 | 100.00% | 1 | 100.00% |
/*
* Tables
*/
static struct nft_table *nft_table_lookup(const struct nft_af_info *afi,
const struct nlattr *nla,
u8 genmask)
{
struct nft_table *table;
list_for_each_entry(table, &afi->tables, list) {
if (!nla_strcmp(nla, table->name) &&
nft_active_genmask(table, genmask))
return table;
}
return NULL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 38 | 60.32% | 3 | 60.00% |
| Arturo Borrero Gonzalez | 17 | 26.98% | 1 | 20.00% |
| Patrick McHardy | 8 | 12.70% | 1 | 20.00% |
| Total | 63 | 100.00% | 5 | 100.00% |
static struct nft_table *nf_tables_table_lookup(const struct nft_af_info *afi,
const struct nlattr *nla,
u8 genmask)
{
struct nft_table *table;
if (nla == NULL)
return ERR_PTR(-EINVAL);
table = nft_table_lookup(afi, nla, genmask);
if (table != NULL)
return table;
return ERR_PTR(-ENOENT);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 39 | 57.35% | 1 | 20.00% |
| Pablo Neira Ayuso | 22 | 32.35% | 3 | 60.00% |
| Patrick McHardy | 7 | 10.29% | 1 | 20.00% |
| Total | 68 | 100.00% | 5 | 100.00% |
static inline u64 nf_tables_alloc_handle(struct nft_table *table)
{
return ++table->hgenerator;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 12 | 66.67% | 1 | 50.00% |
| Pablo Neira Ayuso | 6 | 33.33% | 1 | 50.00% |
| Total | 18 | 100.00% | 2 | 100.00% |
static const struct nf_chain_type *chain_type[NFPROTO_NUMPROTO][NFT_CHAIN_T_MAX];
static const struct nf_chain_type *
__nf_tables_chain_type_lookup(int family, const struct nlattr *nla)
{
int i;
for (i = 0; i < NFT_CHAIN_T_MAX; i++) {
if (chain_type[family][i] != NULL &&
!nla_strcmp(nla, chain_type[family][i]->name))
return chain_type[family][i];
}
return NULL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 61 | 80.26% | 1 | 33.33% |
| Pablo Neira Ayuso | 15 | 19.74% | 2 | 66.67% |
| Total | 76 | 100.00% | 3 | 100.00% |
static const struct nf_chain_type *
nf_tables_chain_type_lookup(const struct nft_af_info *afi,
const struct nlattr *nla,
bool autoload)
{
const struct nf_chain_type *type;
type = __nf_tables_chain_type_lookup(afi->family, nla);
if (type != NULL)
return type;
#ifdef CONFIG_MODULES
if (autoload) {
nfnl_unlock(NFNL_SUBSYS_NFTABLES);
request_module("nft-chain-%u-%.*s", afi->family,
nla_len(nla), (const char *)nla_data(nla));
nfnl_lock(NFNL_SUBSYS_NFTABLES);
type = __nf_tables_chain_type_lookup(afi->family, nla);
if (type != NULL)
return ERR_PTR(-EAGAIN);
}
#endif
return ERR_PTR(-ENOENT);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 89 | 70.63% | 1 | 20.00% |
| Pablo Neira Ayuso | 36 | 28.57% | 3 | 60.00% |
| Patrick McHardy | 1 | 0.79% | 1 | 20.00% |
| Total | 126 | 100.00% | 5 | 100.00% |
static const struct nla_policy nft_table_policy[NFTA_TABLE_MAX + 1] = {
[NFTA_TABLE_NAME] = { .type = NLA_STRING,
.len = NFT_TABLE_MAXNAMELEN - 1 },
[NFTA_TABLE_FLAGS] = { .type = NLA_U32 },
};
static int nf_tables_fill_table_info(struct sk_buff *skb, struct net *net,
u32 portid, u32 seq, int event, u32 flags,
int family, const struct nft_table *table)
{
struct nlmsghdr *nlh;
struct nfgenmsg *nfmsg;
event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct nfgenmsg), flags);
if (nlh == NULL)
goto nla_put_failure;
nfmsg = nlmsg_data(nlh);
nfmsg->nfgen_family = family;
nfmsg->version = NFNETLINK_V0;
nfmsg->res_id = htons(net->nft.base_seq & 0xffff);
if (nla_put_string(skb, NFTA_TABLE_NAME, table->name) ||
nla_put_be32(skb, NFTA_TABLE_FLAGS, htonl(table->flags)) ||
nla_put_be32(skb, NFTA_TABLE_USE, htonl(table->use)))
goto nla_put_failure;
nlmsg_end(skb, nlh);
return 0;
nla_put_failure:
nlmsg_trim(skb, nlh);
return -1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 125 | 66.84% | 1 | 12.50% |
| Pablo Neira Ayuso | 49 | 26.20% | 5 | 62.50% |
| Patrick McHardy | 10 | 5.35% | 1 | 12.50% |
| Johannes Berg | 3 | 1.60% | 1 | 12.50% |
| Total | 187 | 100.00% | 8 | 100.00% |
static void nf_tables_table_notify(const struct nft_ctx *ctx, int event)
{
struct sk_buff *skb;
int err;
if (!ctx->report &&
!nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
return;
skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
if (skb == NULL)
goto err;
err = nf_tables_fill_table_info(skb, ctx->net, ctx->portid, ctx->seq,
event, 0, ctx->afi->family, ctx->table);
if (err < 0) {
kfree_skb(skb);
goto err;
}
nfnetlink_send(skb, ctx->net, ctx->portid, NFNLGRP_NFTABLES,
ctx->report, GFP_KERNEL);
return;
err:
nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 130 | 87.84% | 1 | 25.00% |
| Pablo Neira Ayuso | 9 | 6.08% | 2 | 50.00% |
| Patrick McHardy | 9 | 6.08% | 1 | 25.00% |
| Total | 148 | 100.00% | 4 | 100.00% |
static int nf_tables_dump_tables(struct sk_buff *skb,
struct netlink_callback *cb)
{
const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
const struct nft_af_info *afi;
const struct nft_table *table;
unsigned int idx = 0, s_idx = cb->args[0];
struct net *net = sock_net(skb->sk);
int family = nfmsg->nfgen_family;
rcu_read_lock();
cb->seq = net->nft.base_seq;
list_for_each_entry_rcu(afi, &net->nft.af_info, list) {
if (family != NFPROTO_UNSPEC && family != afi->family)
continue;
list_for_each_entry_rcu(table, &afi->tables, list) {
if (idx < s_idx)
goto cont;
if (idx > s_idx)
memset(&cb->args[1], 0,
sizeof(cb->args) - sizeof(cb->args[0]));
if (!nft_is_active(net, table))
continue;
if (nf_tables_fill_table_info(skb, net,
NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq,
NFT_MSG_NEWTABLE,
NLM_F_MULTI,
afi->family, table) < 0)
goto done;
nl_dump_check_consistent(cb, nlmsg_hdr(skb));
cont:
idx++;
}
}
done:
rcu_read_unlock();
cb->args[0] = idx;
return skb->len;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 139 | 55.60% | 1 | 11.11% |
| Patrick McHardy | 74 | 29.60% | 3 | 33.33% |
| Pablo Neira Ayuso | 37 | 14.80% | 5 | 55.56% |
| Total | 250 | 100.00% | 9 | 100.00% |
static int nf_tables_gettable(struct net *net, struct sock *nlsk,
struct sk_buff *skb, const struct nlmsghdr *nlh,
const struct nlattr * const nla[],
struct netlink_ext_ack *extack)
{
const struct nfgenmsg *nfmsg = nlmsg_data(nlh);
u8 genmask = nft_genmask_cur(net);
const struct nft_af_info *afi;
const struct nft_table *table;
struct sk_buff *skb2;
int family = nfmsg->nfgen_family;
int err;
if (nlh->nlmsg_flags & NLM_F_DUMP) {
struct netlink_dump_control c = {
.dump = nf_tables_dump_tables,
};
return netlink_dump_start(nlsk, skb, nlh, &c);
}
afi = nf_tables_afinfo_lookup(net, family, false);
if (IS_ERR(afi))
return PTR_ERR(afi);
table = nf_tables_table_lookup(afi, nla[NFTA_TABLE_NAME], genmask);
if (IS_ERR(table))
return PTR_ERR(table);
skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
if (!skb2)
return -ENOMEM;
err = nf_tables_fill_table_info(skb2, net, NETLINK_CB(skb).portid,
nlh->nlmsg_seq, NFT_MSG_NEWTABLE, 0,
family, table);
if (err < 0)
goto err;
return nlmsg_unicast(nlsk, skb2, NETLINK_CB(skb).portid);
err:
kfree_skb(skb2);
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 122 | 48.61% | 2 | 22.22% |
| Arturo Borrero Gonzalez | 89 | 35.46% | 1 | 11.11% |
| Pablo Neira Ayuso | 40 | 15.94% | 6 | 66.67% |
| Total | 251 | 100.00% | 9 | 100.00% |
static void _nf_tables_table_disable(struct net *net,
const struct nft_af_info *afi,
struct nft_table *table,
u32 cnt)
{
struct nft_chain *chain;
u32 i = 0;
list_for_each_entry(chain, &table->chains, list) {
if (!nft_is_active_next(net, chain))
continue;
if (!nft_is_base_chain(chain))
continue;
if (cnt && i++ == cnt)
break;
nf_unregister_net_hooks(net, nft_base_chain(chain)->ops,
afi->nops);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 32 | 35.16% | 5 | 62.50% |
| Arturo Borrero Gonzalez | 30 | 32.97% | 1 | 12.50% |
| Gao Feng | 19 | 20.88% | 1 | 12.50% |
| Patrick McHardy | 10 | 10.99% | 1 | 12.50% |
| Total | 91 | 100.00% | 8 | 100.00% |
static int nf_tables_table_enable(struct net *net,
const struct nft_af_info *afi,
struct nft_table *table)
{
struct nft_chain *chain;
int err, i = 0;
list_for_each_entry(chain, &table->chains, list) {
if (!nft_is_active_next(net, chain))
continue;
if (!nft_is_base_chain(chain))
continue;
err = nf_register_net_hooks(net, nft_base_chain(chain)->ops,
afi->nops);
if (err < 0)
goto err;
i++;
}
return 0;
err:
if (i)
_nf_tables_table_disable(net, afi, table, i);
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Gao Feng | 65 | 55.56% | 1 | 14.29% |
| Arturo Borrero Gonzalez | 25 | 21.37% | 1 | 14.29% |
| Pablo Neira Ayuso | 19 | 16.24% | 4 | 57.14% |
| Patrick McHardy | 8 | 6.84% | 1 | 14.29% |
| Total | 117 | 100.00% | 7 | 100.00% |
static void nf_tables_table_disable(struct net *net,
const struct nft_af_info *afi,
struct nft_table *table)
{
_nf_tables_table_disable(net, afi, table, 0);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 11 | 33.33% | 1 | 20.00% |
| Patrick McHardy | 9 | 27.27% | 1 | 20.00% |
| Pablo Neira Ayuso | 9 | 27.27% | 2 | 40.00% |
| Gao Feng | 4 | 12.12% | 1 | 20.00% |
| Total | 33 | 100.00% | 5 | 100.00% |
static int nf_tables_updtable(struct nft_ctx *ctx)
{
struct nft_trans *trans;
u32 flags;
int ret = 0;
if (!ctx->nla[NFTA_TABLE_FLAGS])
return 0;
flags = ntohl(nla_get_be32(ctx->nla[NFTA_TABLE_FLAGS]));
if (flags & ~NFT_TABLE_F_DORMANT)
return -EINVAL;
if (flags == ctx->table->flags)
return 0;
trans = nft_trans_alloc(ctx, NFT_MSG_NEWTABLE,
sizeof(struct nft_trans_table));
if (trans == NULL)
return -ENOMEM;
if ((flags & NFT_TABLE_F_DORMANT) &&
!(ctx->table->flags & NFT_TABLE_F_DORMANT)) {
nft_trans_table_enable(trans) = false;
} else if (!(flags & NFT_TABLE_F_DORMANT) &&
ctx->table->flags & NFT_TABLE_F_DORMANT) {
ret = nf_tables_table_enable(ctx->net, ctx->afi, ctx->table);
if (ret >= 0) {
ctx->table->flags &= ~NFT_TABLE_F_DORMANT;
nft_trans_table_enable(trans) = true;
}
}
if (ret < 0)
goto err;
nft_trans_table_update(trans) = true;
list_add_tail(&trans->list, &ctx->net->nft.commit_list);
return 0;
err:
nft_trans_destroy(trans);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 195 | 82.63% | 1 | 33.33% |
| Patrick McHardy | 37 | 15.68% | 1 | 33.33% |
| Pablo Neira Ayuso | 4 | 1.69% | 1 | 33.33% |
| Total | 236 | 100.00% | 3 | 100.00% |
static int nf_tables_newtable(struct net *net, struct sock *nlsk,
struct sk_buff *skb, const struct nlmsghdr *nlh,
const struct nlattr * const nla[],
struct netlink_ext_ack *extack)
{
const struct nfgenmsg *nfmsg = nlmsg_data(nlh);
u8 genmask = nft_genmask_next(net);
const struct nlattr *name;
struct nft_af_info *afi;
struct nft_table *table;
int family = nfmsg->nfgen_family;
u32 flags = 0;
struct nft_ctx ctx;
int err;
afi = nf_tables_afinfo_lookup(net, family, true);
if (IS_ERR(afi))
return PTR_ERR(afi);
name = nla[NFTA_TABLE_NAME];
table = nf_tables_table_lookup(afi, name, genmask);
if (IS_ERR(table)) {
if (PTR_ERR(table) != -ENOENT)
return PTR_ERR(table);
} else {
if (nlh->nlmsg_flags & NLM_F_EXCL)
return -EEXIST;
if (nlh->nlmsg_flags & NLM_F_REPLACE)
return -EOPNOTSUPP;
nft_ctx_init(&ctx, net, skb, nlh, afi, table, NULL, nla);
return nf_tables_updtable(&ctx);
}
if (nla[NFTA_TABLE_FLAGS]) {
flags = ntohl(nla_get_be32(nla[NFTA_TABLE_FLAGS]));
if (flags & ~NFT_TABLE_F_DORMANT)
return -EINVAL;
}
err = -EAFNOSUPPORT;
if (!try_module_get(afi->owner))
goto err1;
err = -ENOMEM;
table = kzalloc(sizeof(*table), GFP_KERNEL);
if (table == NULL)
goto err2;
table->name = nla_strdup(name, GFP_KERNEL);
if (table->name == NULL)
goto err3;
INIT_LIST_HEAD(&table->chains);
INIT_LIST_HEAD(&table->sets);
INIT_LIST_HEAD(&table->objects);
table->flags = flags;
nft_ctx_init(&ctx, net, skb, nlh, afi, table, NULL, nla);
err = nft_trans_table_add(&ctx, NFT_MSG_NEWTABLE);
if (err < 0)
goto err4;
list_add_tail_rcu(&table->list, &afi->tables);
return 0;
err4:
kfree(table->name);
err3:
kfree(table);
err2:
module_put(afi->owner);
err1:
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 224 | 52.09% | 1 | 7.14% |
| Pablo Neira Ayuso | 116 | 26.98% | 9 | 64.29% |
| Patrick McHardy | 53 | 12.33% | 1 | 7.14% |
| Phil Sutter | 25 | 5.81% | 1 | 7.14% |
| Eric Dumazet | 11 | 2.56% | 1 | 7.14% |
| Gao Feng | 1 | 0.23% | 1 | 7.14% |
| Total | 430 | 100.00% | 14 | 100.00% |
static int nft_flush_table(struct nft_ctx *ctx)
{
int err;
struct nft_chain *chain, *nc;
struct nft_object *obj, *ne;
struct nft_set *set, *ns;
list_for_each_entry(chain, &ctx->table->chains, list) {
if (!nft_is_active_next(ctx->net, chain))
continue;
ctx->chain = chain;
err = nft_delrule_by_chain(ctx);
if (err < 0)
goto out;
}
list_for_each_entry_safe(set, ns, &ctx->table->sets, list) {
if (!nft_is_active_next(ctx->net, set))
continue;
if (set->flags & NFT_SET_ANONYMOUS &&
!list_empty(&set->bindings))
continue;
err = nft_delset(ctx, set);
if (err < 0)
goto out;
}
list_for_each_entry_safe(obj, ne, &ctx->table->objects, list) {
err = nft_delobj(ctx, obj);
if (err < 0)
goto out;
}
list_for_each_entry_safe(chain, nc, &ctx->table->chains, list) {
if (!nft_is_active_next(ctx->net, chain))
continue;
ctx->chain = chain;
err = nft_delchain(ctx);
if (err < 0)
goto out;
}
err = nft_deltable(ctx);
out:
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 121 | 51.93% | 1 | 20.00% |
| Pablo Neira Ayuso | 112 | 48.07% | 4 | 80.00% |
| Total | 233 | 100.00% | 5 | 100.00% |
static int nft_flush(struct nft_ctx *ctx, int family)
{
struct nft_af_info *afi;
struct nft_table *table, *nt;
const struct nlattr * const *nla = ctx->nla;
int err = 0;
list_for_each_entry(afi, &ctx->net->nft.af_info, list) {
if (family != AF_UNSPEC && afi->family != family)
continue;
ctx->afi = afi;
list_for_each_entry_safe(table, nt, &afi->tables, list) {
if (!nft_is_active_next(ctx->net, table))
continue;
if (nla[NFTA_TABLE_NAME] &&
nla_strcmp(nla[NFTA_TABLE_NAME], table->name) != 0)
continue;
ctx->table = table;
err = nft_flush_table(ctx);
if (err < 0)
goto out;
}
}
out:
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 134 | 91.16% | 1 | 50.00% |
| Pablo Neira Ayuso | 13 | 8.84% | 1 | 50.00% |
| Total | 147 | 100.00% | 2 | 100.00% |
static int nf_tables_deltable(struct net *net, struct sock *nlsk,
struct sk_buff *skb, const struct nlmsghdr *nlh,
const struct nlattr * const nla[],
struct netlink_ext_ack *extack)
{
const struct nfgenmsg *nfmsg = nlmsg_data(nlh);
u8 genmask = nft_genmask_next(net);
struct nft_af_info *afi;
struct nft_table *table;
int family = nfmsg->nfgen_family;
struct nft_ctx ctx;
nft_ctx_init(&ctx, net, skb, nlh, NULL, NULL, NULL, nla);
if (family == AF_UNSPEC || nla[NFTA_TABLE_NAME] == NULL)
return nft_flush(&ctx, family);
afi = nf_tables_afinfo_lookup(net, family, false);
if (IS_ERR(afi))
return PTR_ERR(afi);
table = nf_tables_table_lookup(afi, nla[NFTA_TABLE_NAME], genmask);
if (IS_ERR(table))
return PTR_ERR(table);
if (nlh->nlmsg_flags & NLM_F_NONREC &&
table->use > 0)
return -EBUSY;
ctx.afi = afi;
ctx.table = table;
return nft_flush_table(&ctx);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 110 | 52.38% | 2 | 25.00% |
| Patrick McHardy | 59 | 28.10% | 1 | 12.50% |
| Pablo Neira Ayuso | 41 | 19.52% | 5 | 62.50% |
| Total | 210 | 100.00% | 8 | 100.00% |
static void nf_tables_table_destroy(struct nft_ctx *ctx)
{
BUG_ON(ctx->table->use > 0);
kfree(ctx->table->name);
kfree(ctx->table);
module_put(ctx->afi->owner);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 33 | 70.21% | 1 | 33.33% |
| Phil Sutter | 9 | 19.15% | 1 | 33.33% |
| Patrick McHardy | 5 | 10.64% | 1 | 33.33% |
| Total | 47 | 100.00% | 3 | 100.00% |
int nft_register_chain_type(const struct nf_chain_type *ctype)
{
int err = 0;
if (WARN_ON(ctype->family >= NFPROTO_NUMPROTO))
return -EINVAL;
nfnl_lock(NFNL_SUBSYS_NFTABLES);
if (chain_type[ctype->family][ctype->type] != NULL) {
err = -EBUSY;
goto out;
}
chain_type[ctype->family][ctype->type] = ctype;
out:
nfnl_unlock(NFNL_SUBSYS_NFTABLES);
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 48 | 55.81% | 1 | 25.00% |
| Patrick McHardy | 21 | 24.42% | 1 | 25.00% |
| Florian Westphal | 15 | 17.44% | 1 | 25.00% |
| Pablo Neira Ayuso | 2 | 2.33% | 1 | 25.00% |
| Total | 86 | 100.00% | 4 | 100.00% |
EXPORT_SYMBOL_GPL(nft_register_chain_type);
void nft_unregister_chain_type(const struct nf_chain_type *ctype)
{
nfnl_lock(NFNL_SUBSYS_NFTABLES);
chain_type[ctype->family][ctype->type] = NULL;
nfnl_unlock(NFNL_SUBSYS_NFTABLES);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 29 | 82.86% | 1 | 50.00% |
| Patrick McHardy | 6 | 17.14% | 1 | 50.00% |
| Total | 35 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL_GPL(nft_unregister_chain_type);
/*
* Chains
*/
static struct nft_chain *
nf_tables_chain_lookup_byhandle(const struct nft_table *table, u64 handle,
u8 genmask)
{
struct nft_chain *chain;
list_for_each_entry(chain, &table->chains, list) {
if (chain->handle == handle &&
nft_active_genmask(chain, genmask))
return chain;
}
return ERR_PTR(-ENOENT);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 40 | 66.67% | 1 | 25.00% |
| Pablo Neira Ayuso | 18 | 30.00% | 2 | 50.00% |
| Patrick McHardy | 2 | 3.33% | 1 | 25.00% |
| Total | 60 | 100.00% | 4 | 100.00% |
static struct nft_chain *nf_tables_chain_lookup(const struct nft_table *table,
const struct nlattr *nla,
u8 genmask)
{
struct nft_chain *chain;
if (nla == NULL)
return ERR_PTR(-EINVAL);
list_for_each_entry(chain, &table->chains, list) {
if (!nla_strcmp(nla, chain->name) &&
nft_active_genmask(chain, genmask))
return chain;
}
return ERR_PTR(-ENOENT);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 43 | 53.75% | 1 | 25.00% |
| Patrick McHardy | 21 | 26.25% | 1 | 25.00% |
| Pablo Neira Ayuso | 16 | 20.00% | 2 | 50.00% |
| Total | 80 | 100.00% | 4 | 100.00% |
static const struct nla_policy nft_chain_policy[NFTA_CHAIN_MAX + 1] = {
[NFTA_CHAIN_TABLE] = { .type = NLA_STRING,
.len = NFT_TABLE_MAXNAMELEN - 1 },
[NFTA_CHAIN_HANDLE] = { .type = NLA_U64 },
[NFTA_CHAIN_NAME] = { .type = NLA_STRING,
.len = NFT_CHAIN_MAXNAMELEN - 1 },
[NFTA_CHAIN_HOOK] = { .type = NLA_NESTED },
[NFTA_CHAIN_POLICY] = { .type = NLA_U32 },
[NFTA_CHAIN_TYPE] = { .type = NLA_STRING },
[NFTA_CHAIN_COUNTERS] = { .type = NLA_NESTED },
};
static const struct nla_policy nft_hook_policy[NFTA_HOOK_MAX + 1] = {
[NFTA_HOOK_HOOKNUM] = { .type = NLA_U32 },
[NFTA_HOOK_PRIORITY] = { .type = NLA_U32 },
[NFTA_HOOK_DEV] = { .type = NLA_STRING,
.len = IFNAMSIZ - 1 },
};
static int nft_dump_stats(struct sk_buff *skb, struct nft_stats __percpu *stats)
{
struct nft_stats *cpu_stats, total;
struct nlattr *nest;
unsigned int seq;
u64 pkts, bytes;
int cpu;
memset(&total, 0, sizeof(total));
for_each_possible_cpu(cpu) {
cpu_stats = per_cpu_ptr(stats, cpu);
do {
seq = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
pkts = cpu_stats->pkts;
bytes = cpu_stats->bytes;
} while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, seq));
total.pkts += pkts;
total.bytes += bytes;
}
nest = nla_nest_start(skb, NFTA_CHAIN_COUNTERS);
if (nest == NULL)
goto nla_put_failure;
if (nla_put_be64(skb, NFTA_COUNTER_PACKETS, cpu_to_be64(total.pkts),
NFTA_COUNTER_PAD) ||
nla_put_be64(skb, NFTA_COUNTER_BYTES, cpu_to_be64(total.bytes),
NFTA_COUNTER_PAD))
goto nla_put_failure;
nla_nest_end(skb, nest);
return 0;
nla_put_failure:
return -ENOSPC;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 153 | 80.53% | 1 | 25.00% |
| Pablo Neira Ayuso | 33 | 17.37% | 2 | 50.00% |
| Nicolas Dichtel | 4 | 2.11% | 1 | 25.00% |
| Total | 190 | 100.00% | 4 | 100.00% |
static int nf_tables_fill_chain_info(struct sk_buff *skb, struct net *net,
u32 portid, u32 seq, int event, u32 flags,
int family, const struct nft_table *table,
const struct nft_chain *chain)
{
struct nlmsghdr *nlh;
struct nfgenmsg *nfmsg;
event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct nfgenmsg), flags);
if (nlh == NULL)
goto nla_put_failure;
nfmsg = nlmsg_data(nlh);
nfmsg->nfgen_family = family;
nfmsg->version = NFNETLINK_V0;
nfmsg->res_id = htons(net->nft.base_seq & 0xffff);
if (nla_put_string(skb, NFTA_CHAIN_TABLE, table->name))
goto nla_put_failure;
if (nla_put_be64(skb, NFTA_CHAIN_HANDLE, cpu_to_be64(chain->handle),
NFTA_CHAIN_PAD))
goto nla_put_failure;
if (nla_put_string(skb, NFTA_CHAIN_NAME, chain->name))
goto nla_put_failure;
if (nft_is_base_chain(chain)) {
const struct nft_base_chain *basechain = nft_base_chain(chain);
const struct nf_hook_ops *ops = &basechain->ops[0];
struct nlattr *nest;
nest = nla_nest_start(skb, NFTA_CHAIN_HOOK);
if (nest == NULL)
goto nla_put_failure;
if (nla_put_be32(skb, NFTA_HOOK_HOOKNUM, htonl(ops->hooknum)))
goto nla_put_failure;
if (nla_put_be32(skb, NFTA_HOOK_PRIORITY, htonl(ops->priority)))
goto nla_put_failure;
if (basechain->dev_name[0] &&
nla_put_string(skb, NFTA_HOOK_DEV, basechain->dev_name))
goto nla_put_failure;
nla_nest_end(skb, nest);
if (nla_put_be32(skb, NFTA_CHAIN_POLICY,
htonl(basechain->policy)))
goto nla_put_failure;
if (nla_put_string(skb, NFTA_CHAIN_TYPE, basechain->type->name))
goto nla_put_failure;
if (basechain->stats && nft_dump_stats(skb, basechain->stats))
goto nla_put_failure;
}
if (nla_put_be32(skb, NFTA_CHAIN_USE, htonl(chain->use)))
goto nla_put_failure;
nlmsg_end(skb, nlh);
return 0;
nla_put_failure:
nlmsg_trim(skb, nlh);
return -1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 276 | 68.83% | 1 | 9.09% |
| Pablo Neira Ayuso | 120 | 29.93% | 8 | 72.73% |
| Johannes Berg | 3 | 0.75% | 1 | 9.09% |
| Nicolas Dichtel | 2 | 0.50% | 1 | 9.09% |
| Total | 401 | 100.00% | 11 | 100.00% |
static void nf_tables_chain_notify(const struct nft_ctx *ctx, int event)
{
struct sk_buff *skb;
int err;
if (!ctx->report &&
!nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
return;
skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
if (skb == NULL)
goto err;
err = nf_tables_fill_chain_info(skb, ctx->net, ctx->portid, ctx->seq,
event, 0, ctx->afi->family, ctx->table,
ctx->chain);
if (err < 0) {
kfree_skb(skb);
goto err;
}
nfnetlink_send(skb, ctx->net, ctx->portid, NFNLGRP_NFTABLES,
ctx->report, GFP_KERNEL);
return;
err:
nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 130 | 85.53% | 1 | 25.00% |
| Pablo Neira Ayuso | 22 | 14.47% | 3 | 75.00% |
| Total | 152 | 100.00% | 4 | 100.00% |
static int nf_tables_dump_chains(struct sk_buff *skb,
struct netlink_callback *cb)
{
const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
const struct nft_af_info *afi;
const struct nft_table *table;
const struct nft_chain *chain;
unsigned int idx = 0, s_idx = cb->args[0];
struct net *net = sock_net(skb->sk);
int family = nfmsg->nfgen_family;
rcu_read_lock();
cb->seq = net->nft.base_seq;
list_for_each_entry_rcu(afi, &net->nft.af_info, list) {
if (family != NFPROTO_UNSPEC && family != afi->family)
continue;
list_for_each_entry_rcu(table, &afi->tables, list) {
list_for_each_entry_rcu(chain, &table->chains, list) {
if (idx < s_idx)
goto cont;
if (idx > s_idx)
memset(&cb->args[1], 0,
sizeof(cb->args) - sizeof(cb->args[0]));
if (!nft_is_active(net, chain))
continue;
if (nf_tables_fill_chain_info(skb, net,
NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq,
NFT_MSG_NEWCHAIN,
NLM_F_MULTI,
afi->family, table, chain) < 0)
goto done;
nl_dump_check_consistent(cb, nlmsg_hdr(skb));
cont:
idx++;
}
}
}
done:
rcu_read_unlock();
cb->args[0] = idx;
return skb->len;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 170 | 63.43% | 1 | 14.29% |
| Patrick McHardy | 69 | 25.75% | 2 | 28.57% |
| Pablo Neira Ayuso | 29 | 10.82% | 4 | 57.14% |
| Total | 268 | 100.00% | 7 | 100.00% |
static int nf_tables_getchain(struct net *net, struct sock *nlsk,
struct sk_buff *skb, const struct nlmsghdr *nlh,
const struct nlattr * const nla[],
struct netlink_ext_ack *extack)
{
const struct nfgenmsg *nfmsg = nlmsg_data(nlh);
u8 genmask = nft_genmask_cur(net);
const struct nft_af_info *afi;
const struct nft_table *table;
const struct nft_chain *chain;
struct sk_buff *skb2;
int family = nfmsg->nfgen_family;
int err;
if (nlh->nlmsg_flags & NLM_F_DUMP) {
struct netlink_dump_control c = {
.dump = nf_tables_dump_chains,
};
return netlink_dump_start(nlsk, skb, nlh, &c);
}
afi = nf_tables_afinfo_lookup(net, family, false);
if (IS_ERR(afi))
return PTR_ERR(afi);
table = nf_tables_table_lookup(afi, nla[NFTA_CHAIN_TABLE], genmask);
if (IS_ERR(table))
return PTR_ERR(table);
chain = nf_tables_chain_lookup(table, nla[NFTA_CHAIN_NAME], genmask);
if (IS_ERR(chain))
return PTR_ERR(chain);
skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
if (!skb2)
return -ENOMEM;
err = nf_tables_fill_chain_info(skb2, net, NETLINK_CB(skb).portid,
nlh->nlmsg_seq, NFT_MSG_NEWCHAIN, 0,
family, table, chain);
if (err < 0)
goto err;
return nlmsg_unicast(nlsk, skb2, NETLINK_CB(skb).portid);
err:
kfree_skb(skb2);
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 182 | 63.64% | 1 | 9.09% |
| Pablo Neira Ayuso | 70 | 24.48% | 8 | 72.73% |
| Patrick McHardy | 34 | 11.89% | 2 | 18.18% |
| Total | 286 | 100.00% | 11 | 100.00% |
static const struct nla_policy nft_counter_policy[NFTA_COUNTER_MAX + 1] = {
[NFTA_COUNTER_PACKETS] = { .type = NLA_U64 },
[NFTA_COUNTER_BYTES] = { .type = NLA_U64 },
};
static struct nft_stats __percpu *nft_stats_alloc(const struct nlattr *attr)
{
struct nlattr *tb[NFTA_COUNTER_MAX+1];
struct nft_stats __percpu *newstats;
struct nft_stats *stats;
int err;
err = nla_parse_nested(tb, NFTA_COUNTER_MAX, attr, nft_counter_policy,
NULL);
if (err < 0)
return ERR_PTR(err);
if (!tb[NFTA_COUNTER_BYTES] || !tb[NFTA_COUNTER_PACKETS])
return ERR_PTR(-EINVAL);
newstats = netdev_alloc_pcpu_stats(struct nft_stats);
if (newstats == NULL)
return ERR_PTR(-ENOMEM);
/* Restore old counters on this cpu, no problem. Per-cpu statistics
* are not exposed to userspace.
*/
preempt_disable();
stats = this_cpu_ptr(newstats);
stats->bytes = be64_to_cpu(nla_get_be64(tb[NFTA_COUNTER_BYTES]));
stats->pkts = be64_to_cpu(nla_get_be64(tb[NFTA_COUNTER_PACKETS]));
preempt_enable();
return newstats;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 93 | 60.00% | 1 | 14.29% |
| Patrick McHardy | 46 | 29.68% | 3 | 42.86% |
| Pablo Neira Ayuso | 14 | 9.03% | 2 | 28.57% |
| Johannes Berg | 2 | 1.29% | 1 | 14.29% |
| Total | 155 | 100.00% | 7 | 100.00% |
static void nft_chain_stats_replace(struct nft_base_chain *chain,
struct nft_stats __percpu *newstats)
{
if (newstats == NULL)
return;
if (chain->stats) {
struct nft_stats __percpu *oldstats =
nft_dereference(chain->stats);
rcu_assign_pointer(chain->stats, newstats);
synchronize_rcu();
free_percpu(oldstats);
} else
rcu_assign_pointer(chain->stats, newstats);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 48 | 66.67% | 1 | 20.00% |
| Patrick McHardy | 16 | 22.22% | 3 | 60.00% |
| Pablo Neira Ayuso | 8 | 11.11% | 1 | 20.00% |
| Total | 72 | 100.00% | 5 | 100.00% |
static void nf_tables_chain_destroy(struct nft_chain *chain)
{
BUG_ON(chain->use > 0);
if (nft_is_base_chain(chain)) {
struct nft_base_chain *basechain = nft_base_chain(chain);
module_put(basechain->type->owner);
free_percpu(basechain->stats);
if (basechain->stats)
static_branch_dec(&nft_counters_enabled);
if (basechain->ops[0].dev != NULL)
dev_put(basechain->ops[0].dev);
kfree(chain->name);
kfree(basechain);
} else {
kfree(chain->name);
kfree(chain);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 51 | 42.86% | 3 | 50.00% |
| Arturo Borrero Gonzalez | 48 | 40.34% | 1 | 16.67% |
| Phil Sutter | 14 | 11.76% | 1 | 16.67% |
| Patrick McHardy | 6 | 5.04% | 1 | 16.67% |
| Total | 119 | 100.00% | 6 | 100.00% |
struct nft_chain_hook {
u32 num;
u32 priority;
const struct nf_chain_type *type;
struct net_device *dev;
};
static int nft_chain_parse_hook(struct net *net,
const struct nlattr * const nla[],
struct nft_af_info *afi,
struct nft_chain_hook *hook, bool create)
{
struct nlattr *ha[NFTA_HOOK_MAX + 1];
const struct nf_chain_type *type;
struct net_device *dev;
int err;
err = nla_parse_nested(ha, NFTA_HOOK_MAX, nla[NFTA_CHAIN_HOOK],
nft_hook_policy, NULL);
if (err < 0)
return err;
if (ha[NFTA_HOOK_HOOKNUM] == NULL ||
ha[NFTA_HOOK_PRIORITY] == NULL)
return -EINVAL;
hook->num = ntohl(nla_get_be32(ha[NFTA_HOOK_HOOKNUM]));
if (hook->num >= afi->nhooks)
return -EINVAL;
hook->priority = ntohl(nla_get_be32(ha[NFTA_HOOK_PRIORITY]));
type = chain_type[afi->family][NFT_CHAIN_T_DEFAULT];
if (nla[NFTA_CHAIN_TYPE]) {
type = nf_tables_chain_type_lookup(afi, nla[NFTA_CHAIN_TYPE],
create);
if (IS_ERR(type))
return PTR_ERR(type);
}
if (!(type->hook_mask & (1 << hook->num)))
return -EOPNOTSUPP;
if (!try_module_get(type->owner))
return -ENOENT;
hook->type = type;
hook->dev = NULL;
if (afi->flags & NFT_AF_NEEDS_DEV) {
char ifname[IFNAMSIZ];
if (!ha[NFTA_HOOK_DEV]) {
module_put(type->owner);
return -EOPNOTSUPP;
}
nla_strlcpy(ifname, ha[NFTA_HOOK_DEV], IFNAMSIZ);
dev = dev_get_by_name(net, ifname);
if (!dev) {
module_put(type->owner);
return -ENOENT;
}
hook->dev = dev;
} else if (ha[NFTA_HOOK_DEV]) {
module_put(type->owner);
return -EOPNOTSUPP;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 276 | 79.31% | 3 | 60.00% |
| Arturo Borrero Gonzalez | 70 | 20.11% | 1 | 20.00% |
| Johannes Berg | 2 | 0.57% | 1 | 20.00% |
| Total | 348 | 100.00% | 5 | 100.00% |
static void nft_chain_release_hook(struct nft_chain_hook *hook)
{
module_put(hook->type->owner);
if (hook->dev != NULL)
dev_put(hook->dev);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 35 | 100.00% | 1 | 100.00% |
| Total | 35 | 100.00% | 1 | 100.00% |
static int nf_tables_addchain(struct nft_ctx *ctx, u8 family, u8 genmask,
u8 policy, bool create)
{
const struct nlattr * const *nla = ctx->nla;
struct nft_table *table = ctx->table;
struct nft_af_info *afi = ctx->afi;
struct nft_base_chain *basechain;
struct nft_stats __percpu *stats;
struct net *net = ctx->net;
struct nft_chain *chain;
unsigned int i;
int err;
if (table->use == UINT_MAX)
return -EOVERFLOW;
if (nla[NFTA_CHAIN_HOOK]) {
struct nft_chain_hook hook;
struct nf_hook_ops *ops;
nf_hookfn *hookfn;
err = nft_chain_parse_hook(net, nla, afi, &hook, create);
if (err < 0)
return err;
basechain = kzalloc(sizeof(*basechain), GFP_KERNEL);
if (basechain == NULL) {
nft_chain_release_hook(&hook);
return -ENOMEM;
}
if (hook.dev != NULL)
strncpy(basechain->dev_name, hook.dev->name, IFNAMSIZ);
if (nla[NFTA_CHAIN_COUNTERS]) {
stats = nft_stats_alloc(nla[NFTA_CHAIN_COUNTERS]);
if (IS_ERR(stats)) {
nft_chain_release_hook(&hook);
kfree(basechain);
return PTR_ERR(stats);
}
basechain->stats = stats;
static_branch_inc(&nft_counters_enabled);
}
hookfn = hook.type->hooks[hook.num];
basechain->type = hook.type;
chain = &basechain->chain;
for (i = 0; i < afi->nops; i++) {
ops = &basechain->ops[i];
ops->pf = family;
ops->hooknum = hook.num;
ops->priority = hook.priority;
ops->priv = chain;
ops->hook = afi->hooks[ops->hooknum];
ops->dev = hook.dev;
if (hookfn)
ops->hook = hookfn;
if (afi->hook_ops_init)
afi->hook_ops_init(ops, i);
}
chain->flags |= NFT_BASE_CHAIN;
basechain->policy = policy;
} else {
chain = kzalloc(sizeof(*chain), GFP_KERNEL);
if (chain == NULL)
return -ENOMEM;
}
INIT_LIST_HEAD(&chain->rules);
chain->handle = nf_tables_alloc_handle(table);
chain->table = table;
chain->name = nla_strdup(nla[NFTA_CHAIN_NAME], GFP_KERNEL);
if (!chain->name) {
err = -ENOMEM;
goto err1;
}
err = nf_tables_register_hooks(net, table, chain, afi->nops);
if (err < 0)
goto err1;
ctx->chain = chain;
err = nft_trans_chain_add(ctx, NFT_MSG_NEWCHAIN);
if (err < 0)
goto err2;
table->use++;
list_add_tail_rcu(&chain->list, &table->chains);
return 0;
err2:
nf_tables_unregister_hooks(net, table, chain, afi->nops);
err1:
nf_tables_chain_destroy(chain);
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 552 | 96.84% | 6 | 85.71% |
| Arturo Borrero Gonzalez | 18 | 3.16% | 1 | 14.29% |
| Total | 570 | 100.00% | 7 | 100.00% |
static int nf_tables_updchain(struct nft_ctx *ctx, u8 genmask, u8 policy,
bool create)
{
const struct nlattr * const *nla = ctx->nla;
struct nft_table *table = ctx->table;
struct nft_chain *chain = ctx->chain;
struct nft_af_info *afi = ctx->afi;
struct nft_base_chain *basechain;
struct nft_stats *stats = NULL;
struct nft_chain_hook hook;
const struct nlattr *name;
struct nf_hook_ops *ops;
struct nft_trans *trans;
int err, i;
if (nla[NFTA_CHAIN_HOOK]) {
if (!nft_is_base_chain(chain))
return -EBUSY;
err = nft_chain_parse_hook(ctx->net, nla, ctx->afi, &hook,
create);
if (err < 0)
return err;
basechain = nft_base_chain(chain);
if (basechain->type != hook.type) {
nft_chain_release_hook(&hook);
return -EBUSY;
}
for (i = 0; i < afi->nops; i++) {
ops = &basechain->ops[i];
if (ops->hooknum != hook.num ||
ops->priority != hook.priority ||
ops->dev != hook.dev) {
nft_chain_release_hook(&hook);
return -EBUSY;
}
}
nft_chain_release_hook(&hook);
}
if (nla[NFTA_CHAIN_HANDLE] &&
nla[NFTA_CHAIN_NAME]) {
struct nft_chain *chain2;
chain2 = nf_tables_chain_lookup(table, nla[NFTA_CHAIN_NAME],
genmask);
if (!IS_ERR(chain2))
return -EEXIST;
}
if (nla[NFTA_CHAIN_COUNTERS]) {
if (!nft_is_base_chain(chain))
return -EOPNOTSUPP;
stats = nft_stats_alloc(nla[NFTA_CHAIN_COUNTERS]);
if (IS_ERR(stats))
return PTR_ERR(stats);
}
trans = nft_trans_alloc(ctx, NFT_MSG_NEWCHAIN,
sizeof(struct nft_trans_chain));
if (trans == NULL) {
free_percpu(stats);
return -ENOMEM;
}
nft_trans_chain_stats(trans) = stats;
nft_trans_chain_update(trans) = true;
if (nla[NFTA_CHAIN_POLICY])
nft_trans_chain_policy(trans) = policy;
else
nft_trans_chain_policy(trans) = -1;
name = nla[NFTA_CHAIN_NAME];
if (nla[NFTA_CHAIN_HANDLE] && name) {
nft_trans_chain_name(trans) =
nla_strdup(name, GFP_KERNEL);
if (!nft_trans_chain_name(trans)) {
kfree(trans);
free_percpu(stats);
return -ENOMEM;
}
}
list_add_tail(&trans->list, &ctx->net->nft.commit_list);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 408 | 85.36% | 6 | 60.00% |
| Arturo Borrero Gonzalez | 63 | 13.18% | 1 | 10.00% |
| Patrick McHardy | 4 | 0.84% | 2 | 20.00% |
| JingPiao Chen | 3 | 0.63% | 1 | 10.00% |
| Total | 478 | 100.00% | 10 | 100.00% |
static int nf_tables_newchain(struct net *net, struct sock *nlsk,
struct sk_buff *skb, const struct nlmsghdr *nlh,
const struct nlattr * const nla[],
struct netlink_ext_ack *extack)
{
const struct nfgenmsg *nfmsg = nlmsg_data(nlh);
const struct nlattr * uninitialized_var(name);
u8 genmask = nft_genmask_next(net);
int family = nfmsg->nfgen_family;
struct nft_af_info *afi;
struct nft_table *table;
struct nft_chain *chain;
u8 policy = NF_ACCEPT;
struct nft_ctx ctx;
u64 handle = 0;
bool create;
create = nlh->nlmsg_flags & NLM_F_CREATE ? true : false;
afi = nf_tables_afinfo_lookup(net, family, true);
if (IS_ERR(afi))
return PTR_ERR(afi);
table = nf_tables_table_lookup(afi, nla[NFTA_CHAIN_TABLE], genmask);
if (IS_ERR(table))
return PTR_ERR(table);
chain = NULL;
name = nla[NFTA_CHAIN_NAME];
if (nla[NFTA_CHAIN_HANDLE]) {
handle = be64_to_cpu(nla_get_be64(nla[NFTA_CHAIN_HANDLE]));
chain = nf_tables_chain_lookup_byhandle(table, handle, genmask);
if (IS_ERR(chain))
return PTR_ERR(chain);
} else {
chain = nf_tables_chain_lookup(table, name, genmask);
if (IS_ERR(chain)) {
if (PTR_ERR(chain) != -ENOENT)
return PTR_ERR(chain);
chain = NULL;
}
}
if (nla[NFTA_CHAIN_POLICY]) {
if (chain != NULL &&
!nft_is_base_chain(chain))
return -EOPNOTSUPP;
if (chain == NULL &&
nla[NFTA_CHAIN_HOOK] == NULL)
return -EOPNOTSUPP;
policy = ntohl(nla_get_be32(nla[NFTA_CHAIN_POLICY]));
switch (policy) {
case NF_DROP:
case NF_ACCEPT:
break;
default:
return -EINVAL;
}
}
nft_ctx_init(&ctx, net, skb, nlh, afi, table, chain, nla);
if (chain != NULL) {
if (nlh->nlmsg_flags & NLM_F_EXCL)
return -EEXIST;
if (nlh->nlmsg_flags & NLM_F_REPLACE)
return -EOPNOTSUPP;
return nf_tables_updchain(&ctx, genmask, policy, create);
}
return nf_tables_addchain(&ctx, family, genmask, policy, create);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 361 | 85.34% | 9 | 60.00% |
| Patrick McHardy | 54 | 12.77% | 4 | 26.67% |
| Phil Sutter | 7 | 1.65% | 1 | 6.67% |
| Arturo Borrero Gonzalez | 1 | 0.24% | 1 | 6.67% |
| Total | 423 | 100.00% | 15 | 100.00% |
static int nf_tables_delchain(struct net *net, struct sock *nlsk,
struct sk_buff *skb, const struct nlmsghdr *nlh,
const struct nlattr * const nla[],
struct netlink_ext_ack *extack)
{
const struct nfgenmsg *nfmsg = nlmsg_data(nlh);
u8 genmask = nft_genmask_next(net);
struct nft_af_info *afi;
struct nft_table *table;
struct nft_chain *chain;
struct nft_rule *rule;
int family = nfmsg->nfgen_family;
struct nft_ctx ctx;
u32 use;
int err;
afi = nf_tables_afinfo_lookup(net, family, false);
if (IS_ERR(afi))
return PTR_ERR(afi);
table = nf_tables_table_lookup(afi, nla[NFTA_CHAIN_TABLE], genmask);
if (IS_ERR(table))
return PTR_ERR(table);
chain = nf_tables_chain_lookup(table, nla[NFTA_CHAIN_NAME], genmask);
if (IS_ERR(chain))
return PTR_ERR(chain);
if (nlh->nlmsg_flags & NLM_F_NONREC &&
chain->use > 0)
return -EBUSY;
nft_ctx_init(&ctx, net, skb, nlh, afi, table, chain, nla);
use = chain->use;
list_for_each_entry(rule, &chain->rules, list) {
if (!nft_is_active_next(net, rule))
continue;
use--;
err = nft_delrule(&ctx, rule);
if (err < 0)
return err;
}
/* There are rules and elements that are still holding references to us,
* we cannot do a recursive removal in this case.
*/
if (use > 0)
return -EBUSY;
return nft_delchain(&ctx);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 158 | 56.63% | 3 | 27.27% |
| Pablo Neira Ayuso | 119 | 42.65% | 7 | 63.64% |
| Arturo Borrero Gonzalez | 2 | 0.72% | 1 | 9.09% |
| Total | 279 | 100.00% | 11 | 100.00% |
/*
* Expressions
*/
/**
* nft_register_expr - register nf_tables expr type
* @ops: expr type
*
* Registers the expr type for use with nf_tables. Returns zero on
* success or a negative errno code otherwise.
*/
int nft_register_expr(struct nft_expr_type *type)
{
nfnl_lock(NFNL_SUBSYS_NFTABLES);
if (type->family == NFPROTO_UNSPEC)
list_add_tail_rcu(&type->list, &nf_tables_expressions);
else
list_add_rcu(&type->list, &nf_tables_expressions);
nfnl_unlock(NFNL_SUBSYS_NFTABLES);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 34 | 62.96% | 2 | 50.00% |
| Tomasz Bursztyka | 18 | 33.33% | 1 | 25.00% |
| Pablo Neira Ayuso | 2 | 3.70% | 1 | 25.00% |
| Total | 54 | 100.00% | 4 | 100.00% |
EXPORT_SYMBOL_GPL(nft_register_expr);
/**
* nft_unregister_expr - unregister nf_tables expr type
* @ops: expr type
*
* Unregisters the expr typefor use with nf_tables.
*/
void nft_unregister_expr(struct nft_expr_type *type)
{
nfnl_lock(NFNL_SUBSYS_NFTABLES);
list_del_rcu(&type->list);
nfnl_unlock(NFNL_SUBSYS_NFTABLES);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 27 | 96.43% | 2 | 66.67% |
| Pablo Neira Ayuso | 1 | 3.57% | 1 | 33.33% |
| Total | 28 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL_GPL(nft_unregister_expr);
static const struct nft_expr_type *__nft_expr_type_get(u8 family,
struct nlattr *nla)
{
const struct nft_expr_type *type;
list_for_each_entry(type, &nf_tables_expressions, list) {
if (!nla_strcmp(nla, type->name) &&
(!type->family || type->family == family))
return type;
}
return NULL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 64 | 100.00% | 3 | 100.00% |
| Total | 64 | 100.00% | 3 | 100.00% |
static const struct nft_expr_type *nft_expr_type_get(u8 family,
struct nlattr *nla)
{
const struct nft_expr_type *type;
if (nla == NULL)
return ERR_PTR(-EINVAL);
type = __nft_expr_type_get(family, nla);
if (type != NULL && try_module_get(type->owner))
return type;
#ifdef CONFIG_MODULES
if (type == NULL) {
nfnl_unlock(NFNL_SUBSYS_NFTABLES);
request_module("nft-expr-%u-%.*s", family,
nla_len(nla), (char *)nla_data(nla));
nfnl_lock(NFNL_SUBSYS_NFTABLES);
if (__nft_expr_type_get(family, nla))
return ERR_PTR(-EAGAIN);
nfnl_unlock(NFNL_SUBSYS_NFTABLES);
request_module("nft-expr-%.*s",
nla_len(nla), (char *)nla_data(nla));
nfnl_lock(NFNL_SUBSYS_NFTABLES);
if (__nft_expr_type_get(family, nla))
return ERR_PTR(-EAGAIN);
}
#endif
return ERR_PTR(-ENOENT);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 173 | 100.00% | 3 | 100.00% |
| Total | 173 | 100.00% | 3 | 100.00% |
static const struct nla_policy nft_expr_policy[NFTA_EXPR_MAX + 1] = {
[NFTA_EXPR_NAME] = { .type = NLA_STRING },
[NFTA_EXPR_DATA] = { .type = NLA_NESTED },
};
static int nf_tables_fill_expr_info(struct sk_buff *skb,
const struct nft_expr *expr)
{
if (nla_put_string(skb, NFTA_EXPR_NAME, expr->ops->type->name))
goto nla_put_failure;
if (expr->ops->dump) {
struct nlattr *data = nla_nest_start(skb, NFTA_EXPR_DATA);
if (data == NULL)
goto nla_put_failure;
if (expr->ops->dump(skb, expr) < 0)
goto nla_put_failure;
nla_nest_end(skb, data);
}
return skb->len;
nla_put_failure:
return -1;
}Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 104 | 100.00% | 2 | 100.00% |
| Total | 104 | 100.00% | 2 | 100.00% |
;
int nft_expr_dump(struct sk_buff *skb, unsigned int attr,
const struct nft_expr *expr)
{
struct nlattr *nest;
nest = nla_nest_start(skb, attr);
if (!nest)
goto nla_put_failure;
if (nf_tables_fill_expr_info(skb, expr) < 0)
goto nla_put_failure;
nla_nest_end(skb, nest);
return 0;
nla_put_failure:
return -1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 72 | 100.00% | 1 | 100.00% |
| Total | 72 | 100.00% | 1 | 100.00% |
struct nft_expr_info {
const struct nft_expr_ops *ops;
struct nlattr *tb[NFT_EXPR_MAXATTR + 1];
};
static int nf_tables_expr_parse(const struct nft_ctx *ctx,
const struct nlattr *nla,
struct nft_expr_info *info)
{
const struct nft_expr_type *type;
const struct nft_expr_ops *ops;
struct nlattr *tb[NFTA_EXPR_MAX + 1];
int err;
err = nla_parse_nested(tb, NFTA_EXPR_MAX, nla, nft_expr_policy, NULL);
if (err < 0)
return err;
type = nft_expr_type_get(ctx->afi->family, tb[NFTA_EXPR_NAME]);
if (IS_ERR(type))
return PTR_ERR(type);
if (tb[NFTA_EXPR_DATA]) {
err = nla_parse_nested(info->tb, type->maxattr,
tb[NFTA_EXPR_DATA], type->policy, NULL);
if (err < 0)
goto err1;
} else
memset(info->tb, 0, sizeof(info->tb[0]) * (type->maxattr + 1));
if (type->select_ops != NULL) {
ops = type->select_ops(ctx,
(const struct nlattr * const *)info->tb);
if (IS_ERR(ops)) {
err = PTR_ERR(ops);
goto err1;
}
} else
ops = type->ops;
info->ops = ops;
return 0;
err1:
module_put(type->owner);
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 237 | 95.18% | 3 | 60.00% |
| Pablo Neira Ayuso | 8 | 3.21% | 1 | 20.00% |
| Johannes Berg | 4 | 1.61% | 1 | 20.00% |
| Total | 249 | 100.00% | 5 | 100.00% |
static int nf_tables_newexpr(const struct nft_ctx *ctx,
const struct nft_expr_info *info,
struct nft_expr *expr)
{
const struct nft_expr_ops *ops = info->ops;
int err;
expr->ops = ops;
if (ops->init) {
err = ops->init(ctx, expr, (const struct nlattr **)info->tb);
if (err < 0)
goto err1;
}
if (ops->validate) {
const struct nft_data *data = NULL;
err = ops->validate(ctx, expr, &data);
if (err < 0)
goto err2;
}
return 0;
err2:
if (ops->destroy)
ops->destroy(ctx, expr);
err1:
expr->ops = NULL;
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 95 | 62.91% | 2 | 66.67% |
| Liping Zhang | 56 | 37.09% | 1 | 33.33% |
| Total | 151 | 100.00% | 3 | 100.00% |
static void nf_tables_expr_destroy(const struct nft_ctx *ctx,
struct nft_expr *expr)
{
if (expr->ops->destroy)
expr->ops->destroy(ctx, expr);
module_put(expr->ops->type->owner);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 47 | 100.00% | 3 | 100.00% |
| Total | 47 | 100.00% | 3 | 100.00% |
struct nft_expr *nft_expr_init(const struct nft_ctx *ctx,
const struct nlattr *nla)
{
struct nft_expr_info info;
struct nft_expr *expr;
int err;
err = nf_tables_expr_parse(ctx, nla, &info);
if (err < 0)
goto err1;
err = -ENOMEM;
expr = kzalloc(info.ops->size, GFP_KERNEL);
if (expr == NULL)
goto err2;
err = nf_tables_newexpr(ctx, &info, expr);
if (err < 0)
goto err3;
return expr;
err3:
kfree(expr);
err2:
module_put(info.ops->type->owner);
err1:
return ERR_PTR(err);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 123 | 93.89% | 1 | 50.00% |
| Liping Zhang | 8 | 6.11% | 1 | 50.00% |
| Total | 131 | 100.00% | 2 | 100.00% |
void nft_expr_destroy(const struct nft_ctx *ctx, struct nft_expr *expr)
{
nf_tables_expr_destroy(ctx, expr);
kfree(expr);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 28 | 100.00% | 1 | 100.00% |
| Total | 28 | 100.00% | 1 | 100.00% |
/*
* Rules
*/
static struct nft_rule *__nf_tables_rule_lookup(const struct nft_chain *chain,
u64 handle)
{
struct nft_rule *rule;
// FIXME: this sucks
list_for_each_entry(rule, &chain->rules, list) {
if (handle == rule->handle)
return rule;
}
return ERR_PTR(-ENOENT);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 51 | 100.00% | 1 | 100.00% |
| Total | 51 | 100.00% | 1 | 100.00% |
static struct nft_rule *nf_tables_rule_lookup(const struct nft_chain *chain,
const struct nlattr *nla)
{
if (nla == NULL)
return ERR_PTR(-EINVAL);
return __nf_tables_rule_lookup(chain, be64_to_cpu(nla_get_be64(nla)));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 47 | 100.00% | 1 | 100.00% |
| Total | 47 | 100.00% | 1 | 100.00% |
static const struct nla_policy nft_rule_policy[NFTA_RULE_MAX + 1] = {
[NFTA_RULE_TABLE] = { .type = NLA_STRING,
.len = NFT_TABLE_MAXNAMELEN - 1 },
[NFTA_RULE_CHAIN] = { .type = NLA_STRING,
.len = NFT_CHAIN_MAXNAMELEN - 1 },
[NFTA_RULE_HANDLE] = { .type = NLA_U64 },
[NFTA_RULE_EXPRESSIONS] = { .type = NLA_NESTED },
[NFTA_RULE_COMPAT] = { .type = NLA_NESTED },
[NFTA_RULE_POSITION] = { .type = NLA_U64 },
[NFTA_RULE_USERDATA] = { .type = NLA_BINARY,
.len = NFT_USERDATA_MAXLEN },
};
static int nf_tables_fill_rule_info(struct sk_buff *skb, struct net *net,
u32 portid, u32 seq, int event,
u32 flags, int family,
const struct nft_table *table,
const struct nft_chain *chain,
const struct nft_rule *rule)
{
struct nlmsghdr *nlh;
struct nfgenmsg *nfmsg;
const struct nft_expr *expr, *next;
struct nlattr *list;
const struct nft_rule *prule;
u16 type = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
nlh = nlmsg_put(skb, portid, seq, type, sizeof(struct nfgenmsg), flags);
if (nlh == NULL)
goto nla_put_failure;
nfmsg = nlmsg_data(nlh);
nfmsg->nfgen_family = family;
nfmsg->version = NFNETLINK_V0;
nfmsg->res_id = htons(net->nft.base_seq & 0xffff);
if (nla_put_string(skb, NFTA_RULE_TABLE, table->name))
goto nla_put_failure;
if (nla_put_string(skb, NFTA_RULE_CHAIN, chain->name))
goto nla_put_failure;
if (nla_put_be64(skb, NFTA_RULE_HANDLE, cpu_to_be64(rule->handle),
NFTA_RULE_PAD))
goto nla_put_failure;
if ((event != NFT_MSG_DELRULE) && (rule->list.prev != &chain->rules)) {
prule = list_prev_entry(rule, list);
if (nla_put_be64(skb, NFTA_RULE_POSITION,
cpu_to_be64(prule->handle),
NFTA_RULE_PAD))
goto nla_put_failure;
}
list = nla_nest_start(skb, NFTA_RULE_EXPRESSIONS);
if (list == NULL)
goto nla_put_failure;
nft_rule_for_each_expr(expr, next, rule) {
if (nft_expr_dump(skb, NFTA_LIST_ELEM, expr) < 0)
goto nla_put_failure;
}
nla_nest_end(skb, list);
if (rule->udata) {
struct nft_userdata *udata = nft_userdata(rule);
if (nla_put(skb, NFTA_RULE_USERDATA, udata->len + 1,
udata->data) < 0)
goto nla_put_failure;
}
nlmsg_end(skb, nlh);
return 0;
nla_put_failure:
nlmsg_trim(skb, nlh);
return -1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 246 | 65.60% | 3 | 25.00% |
| Eric Leblond | 60 | 16.00% | 1 | 8.33% |
| Arturo Borrero Gonzalez | 31 | 8.27% | 1 | 8.33% |
| Pablo Neira Ayuso | 30 | 8.00% | 4 | 33.33% |
| Nicolas Dichtel | 4 | 1.07% | 1 | 8.33% |
| Johannes Berg | 3 | 0.80% | 1 | 8.33% |
| simran singhal | 1 | 0.27% | 1 | 8.33% |
| Total | 375 | 100.00% | 12 | 100.00% |
static void nf_tables_rule_notify(const struct nft_ctx *ctx,
const struct nft_rule *rule, int event)
{
struct sk_buff *skb;
int err;
if (!ctx->report &&
!nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
return;
skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
if (skb == NULL)
goto err;
err = nf_tables_fill_rule_info(skb, ctx->net, ctx->portid, ctx->seq,
event, 0, ctx->afi->family, ctx->table,
ctx->chain, rule);
if (err < 0) {
kfree_skb(skb);
goto err;
}
nfnetlink_send(skb, ctx->net, ctx->portid, NFNLGRP_NFTABLES,
ctx->report, GFP_KERNEL);
return;
err:
nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 137 | 85.62% | 1 | 25.00% |
| Pablo Neira Ayuso | 23 | 14.38% | 3 | 75.00% |
| Total | 160 | 100.00% | 4 | 100.00% |
struct nft_rule_dump_ctx {
char *table;
char *chain;
};
static int nf_tables_dump_rules(struct sk_buff *skb,
struct netlink_callback *cb)
{
const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
const struct nft_rule_dump_ctx *ctx = cb->data;
const struct nft_af_info *afi;
const struct nft_table *table;
const struct nft_chain *chain;
const struct nft_rule *rule;
unsigned int idx = 0, s_idx = cb->args[0];
struct net *net = sock_net(skb->sk);
int family = nfmsg->nfgen_family;
rcu_read_lock();
cb->seq = net->nft.base_seq;
list_for_each_entry_rcu(afi, &net->nft.af_info, list) {
if (family != NFPROTO_UNSPEC && family != afi->family)
continue;
list_for_each_entry_rcu(table, &afi->tables, list) {
if (ctx && ctx->table &&
strcmp(ctx->table, table->name) != 0)
continue;
list_for_each_entry_rcu(chain, &table->chains, list) {
if (ctx && ctx->chain[0] &&
strcmp(ctx->chain, chain->name) != 0)
continue;
list_for_each_entry_rcu(rule, &chain->rules, list) {
if (!nft_is_active(net, rule))
goto cont;
if (idx < s_idx)
goto cont;
if (idx > s_idx)
memset(&cb->args[1], 0,
sizeof(cb->args) - sizeof(cb->args[0]));
if (nf_tables_fill_rule_info(skb, net, NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq,
NFT_MSG_NEWRULE,
NLM_F_MULTI | NLM_F_APPEND,
afi->family, table, chain, rule) < 0)
goto done;
nl_dump_check_consistent(cb, nlmsg_hdr(skb));
cont:
idx++;
}
}
}
}
done:
rcu_read_unlock();
cb->args[0] = idx;
return skb->len;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 232 | 66.86% | 1 | 12.50% |
| Pablo Neira Ayuso | 115 | 33.14% | 7 | 87.50% |
| Total | 347 | 100.00% | 8 | 100.00% |
static int nf_tables_dump_rules_done(struct netlink_callback *cb)
{
struct nft_rule_dump_ctx *ctx = cb->data;
if (ctx) {
kfree(ctx->table);
kfree(ctx->chain);
kfree(ctx);
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Phil Sutter | 29 | 60.42% | 2 | 66.67% |
| Pablo Neira Ayuso | 19 | 39.58% | 1 | 33.33% |
| Total | 48 | 100.00% | 3 | 100.00% |
static int nf_tables_getrule(struct net *net, struct sock *nlsk,
struct sk_buff *skb, const struct nlmsghdr *nlh,
const struct nlattr * const nla[],
struct netlink_ext_ack *extack)
{
const struct nfgenmsg *nfmsg = nlmsg_data(nlh);
u8 genmask = nft_genmask_cur(net);
const struct nft_af_info *afi;
const struct nft_table *table;
const struct nft_chain *chain;
const struct nft_rule *rule;
struct sk_buff *skb2;
int family = nfmsg->nfgen_family;
int err;
if (nlh->nlmsg_flags & NLM_F_DUMP) {
struct netlink_dump_control c = {
.dump = nf_tables_dump_rules,
.done = nf_tables_dump_rules_done,
};
if (nla[NFTA_RULE_TABLE] || nla[NFTA_RULE_CHAIN]) {
struct nft_rule_dump_ctx *ctx;
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
if (nla[NFTA_RULE_TABLE]) {
ctx->table = nla_strdup(nla[NFTA_RULE_TABLE],
GFP_KERNEL);
if (!ctx->table) {
kfree(ctx);
return -ENOMEM;
}
}
if (nla[NFTA_RULE_CHAIN]) {
ctx->chain = nla_strdup(nla[NFTA_RULE_CHAIN],
GFP_KERNEL);
if (!ctx->chain) {
kfree(ctx->table);
kfree(ctx);
return -ENOMEM;
}
}
c.data = ctx;
}
return netlink_dump_start(nlsk, skb, nlh, &c);
}
afi = nf_tables_afinfo_lookup(net, family, false);
if (IS_ERR(afi))
return PTR_ERR(afi);
table = nf_tables_table_lookup(afi, nla[NFTA_RULE_TABLE], genmask);
if (IS_ERR(table))
return PTR_ERR(table);
chain = nf_tables_chain_lookup(table, nla[NFTA_RULE_CHAIN], genmask);
if (IS_ERR(chain))
return PTR_ERR(chain);
rule = nf_tables_rule_lookup(chain, nla[NFTA_RULE_HANDLE]);
if (IS_ERR(rule))
return PTR_ERR(rule);
skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
if (!skb2)
return -ENOMEM;
err = nf_tables_fill_rule_info(skb2, net, NETLINK_CB(skb).portid,
nlh->nlmsg_seq, NFT_MSG_NEWRULE, 0,
family, table, chain, rule);
if (err < 0)
goto err;
return nlmsg_unicast(nlsk, skb2, NETLINK_CB(skb).portid);
err:
kfree_skb(skb2);
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 293 | 63.70% | 1 | 10.00% |
| Pablo Neira Ayuso | 119 | 25.87% | 7 | 70.00% |
| Phil Sutter | 48 | 10.43% | 2 | 20.00% |
| Total | 460 | 100.00% | 10 | 100.00% |
static void nf_tables_rule_destroy(const struct nft_ctx *ctx,
struct nft_rule *rule)
{
struct nft_expr *expr;
/*
* Careful: some expressions might not be initialized in case this
* is called on error from nf_tables_newrule().
*/
expr = nft_expr_first(rule);
while (expr != nft_expr_last(rule) && expr->ops) {
nf_tables_expr_destroy(ctx, expr);
expr = nft_expr_next(expr);
}
kfree(rule);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 47 | 73.44% | 2 | 33.33% |
| Arturo Borrero Gonzalez | 7 | 10.94% | 1 | 16.67% |
| Pablo Neira Ayuso | 6 | 9.38% | 2 | 33.33% |
| Florian Westphal | 4 | 6.25% | 1 | 16.67% |
| Total | 64 | 100.00% | 6 | 100.00% |
#define NFT_RULE_MAXEXPRS 128
static struct nft_expr_info *info;
static int nf_tables_newrule(struct net *net, struct sock *nlsk,
struct sk_buff *skb, const struct nlmsghdr *nlh,
const struct nlattr * const nla[],
struct netlink_ext_ack *extack)
{
const struct nfgenmsg *nfmsg = nlmsg_data(nlh);
u8 genmask = nft_genmask_next(net);
struct nft_af_info *afi;
struct nft_table *table;
struct nft_chain *chain;
struct nft_rule *rule, *old_rule = NULL;
struct nft_userdata *udata;
struct nft_trans *trans = NULL;
struct nft_expr *expr;
struct nft_ctx ctx;
struct nlattr *tmp;
unsigned int size, i, n, ulen = 0, usize = 0;
int err, rem;
bool create;
u64 handle, pos_handle;
create = nlh->nlmsg_flags & NLM_F_CREATE ? true : false;
afi = nf_tables_afinfo_lookup(net, nfmsg->nfgen_family, create);
if (IS_ERR(afi))
return PTR_ERR(afi);
table = nf_tables_table_lookup(afi, nla[NFTA_RULE_TABLE], genmask);
if (IS_ERR(table))
return PTR_ERR(table);
chain = nf_tables_chain_lookup(table, nla[NFTA_RULE_CHAIN], genmask);
if (IS_ERR(chain))
return PTR_ERR(chain);
if (nla[NFTA_RULE_HANDLE]) {
handle = be64_to_cpu(nla_get_be64(nla[NFTA_RULE_HANDLE]));
rule = __nf_tables_rule_lookup(chain, handle);
if (IS_ERR(rule))
return PTR_ERR(rule);
if (nlh->nlmsg_flags & NLM_F_EXCL)
return -EEXIST;
if (nlh->nlmsg_flags & NLM_F_REPLACE)
old_rule = rule;
else
return -EOPNOTSUPP;
} else {
if (!create || nlh->nlmsg_flags & NLM_F_REPLACE)
return -EINVAL;
handle = nf_tables_alloc_handle(table);
if (chain->use == UINT_MAX)
return -EOVERFLOW;
}
if (nla[NFTA_RULE_POSITION]) {
if (!(nlh->nlmsg_flags & NLM_F_CREATE))
return -EOPNOTSUPP;
pos_handle = be64_to_cpu(nla_get_be64(nla[NFTA_RULE_POSITION]));
old_rule = __nf_tables_rule_lookup(chain, pos_handle);
if (IS_ERR(old_rule))
return PTR_ERR(old_rule);
}
nft_ctx_init(&ctx, net, skb, nlh, afi, table, chain, nla);
n = 0;
size = 0;
if (nla[NFTA_RULE_EXPRESSIONS]) {
nla_for_each_nested(tmp, nla[NFTA_RULE_EXPRESSIONS], rem) {
err = -EINVAL;
if (nla_type(tmp) != NFTA_LIST_ELEM)
goto err1;
if (n == NFT_RULE_MAXEXPRS)
goto err1;
err = nf_tables_expr_parse(&ctx, tmp, &info[n]);
if (err < 0)
goto err1;
size += info[n].ops->size;
n++;
}
}
/* Check for overflow of dlen field */
err = -EFBIG;
if (size >= 1 << 12)
goto err1;
if (nla[NFTA_RULE_USERDATA]) {
ulen = nla_len(nla[NFTA_RULE_USERDATA]);
if (ulen > 0)
usize = sizeof(struct nft_userdata) + ulen;
}
err = -ENOMEM;
rule = kzalloc(sizeof(*rule) + size + usize, GFP_KERNEL);
if (rule == NULL)
goto err1;
nft_activate_next(net, rule);
rule->handle = handle;
rule->dlen = size;
rule->udata = ulen ? 1 : 0;
if (ulen) {
udata = nft_userdata(rule);
udata->len = ulen - 1;
nla_memcpy(udata->data, nla[NFTA_RULE_USERDATA], ulen);
}
expr = nft_expr_first(rule);
for (i = 0; i < n; i++) {
err = nf_tables_newexpr(&ctx, &info[i], expr);
if (err < 0)
goto err2;
info[i].ops = NULL;
expr = nft_expr_next(expr);
}
if (nlh->nlmsg_flags & NLM_F_REPLACE) {
if (nft_is_active_next(net, old_rule)) {
trans = nft_trans_rule_add(&ctx, NFT_MSG_DELRULE,
old_rule);
if (trans == NULL) {
err = -ENOMEM;
goto err2;
}
nft_deactivate_next(net, old_rule);
chain->use--;
list_add_tail_rcu(&rule->list, &old_rule->list);
} else {
err = -ENOENT;
goto err2;
}
} else if (nlh->nlmsg_flags & NLM_F_APPEND)
if (old_rule)
list_add_rcu(&rule->list, &old_rule->list);
else
list_add_tail_rcu(&rule->list, &chain->rules);
else {
if (old_rule)
list_add_tail_rcu(&rule->list, &old_rule->list);
else
list_add_rcu(&rule->list, &chain->rules);
}
if (nft_trans_rule_add(&ctx, NFT_MSG_NEWRULE, rule) == NULL) {
err = -ENOMEM;
goto err3;
}
chain->use++;
return 0;
err3:
list_del_rcu(&rule->list);
err2:
nf_tables_rule_destroy(&ctx, rule);
err1:
for (i = 0; i < n; i++) {
if (info[i].ops != NULL)
module_put(info[i].ops->type->owner);
}
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 590 | 60.33% | 5 | 20.83% |
| Pablo Neira Ayuso | 246 | 25.15% | 17 | 70.83% |
| Eric Leblond | 99 | 10.12% | 1 | 4.17% |
| Arturo Borrero Gonzalez | 43 | 4.40% | 1 | 4.17% |
| Total | 978 | 100.00% | 24 | 100.00% |
static struct nft_rule *nft_rule_lookup_byid(const struct net *net,
const struct nlattr *nla)
{
u32 id = ntohl(nla_get_be32(nla));
struct nft_trans *trans;
list_for_each_entry(trans, &net->nft.commit_list, list) {
struct nft_rule *rule = nft_trans_rule(trans);
if (trans->msg_type == NFT_MSG_NEWRULE &&
id == nft_trans_rule_id(trans))
return rule;
}
return ERR_PTR(-ENOENT);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 81 | 100.00% | 1 | 100.00% |
| Total | 81 | 100.00% | 1 | 100.00% |
static int nf_tables_delrule(struct net *net, struct sock *nlsk,
struct sk_buff *skb, const struct nlmsghdr *nlh,
const struct nlattr * const nla[],
struct netlink_ext_ack *extack)
{
const struct nfgenmsg *nfmsg = nlmsg_data(nlh);
u8 genmask = nft_genmask_next(net);
struct nft_af_info *afi;
struct nft_table *table;
struct nft_chain *chain = NULL;
struct nft_rule *rule;
int family = nfmsg->nfgen_family, err = 0;
struct nft_ctx ctx;
afi = nf_tables_afinfo_lookup(net, family, false);
if (IS_ERR(afi))
return PTR_ERR(afi);
table = nf_tables_table_lookup(afi, nla[NFTA_RULE_TABLE], genmask);
if (IS_ERR(table))
return PTR_ERR(table);
if (nla[NFTA_RULE_CHAIN]) {
chain = nf_tables_chain_lookup(table, nla[NFTA_RULE_CHAIN],
genmask);
if (IS_ERR(chain))
return PTR_ERR(chain);
}
nft_ctx_init(&ctx, net, skb, nlh, afi, table, chain, nla);
if (chain) {
if (nla[NFTA_RULE_HANDLE]) {
rule = nf_tables_rule_lookup(chain,
nla[NFTA_RULE_HANDLE]);
if (IS_ERR(rule))
return PTR_ERR(rule);
err = nft_delrule(&ctx, rule);
} else if (nla[NFTA_RULE_ID]) {
rule = nft_rule_lookup_byid(net, nla[NFTA_RULE_ID]);
if (IS_ERR(rule))
return PTR_ERR(rule);
err = nft_delrule(&ctx, rule);
} else {
err = nft_delrule_by_chain(&ctx);
}
} else {
list_for_each_entry(chain, &table->chains, list) {
if (!nft_is_active_next(net, chain))
continue;
ctx.chain = chain;
err = nft_delrule_by_chain(&ctx);
if (err < 0)
break;
}
}
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 307 | 85.99% | 8 | 72.73% |
| Patrick McHardy | 47 | 13.17% | 1 | 9.09% |
| Arturo Borrero Gonzalez | 3 | 0.84% | 2 | 18.18% |
| Total | 357 | 100.00% | 11 | 100.00% |
/*
* Sets
*/
static LIST_HEAD(nf_tables_set_types);
int nft_register_set(struct nft_set_type *type)
{
nfnl_lock(NFNL_SUBSYS_NFTABLES);
list_add_tail_rcu(&type->list, &nf_tables_set_types);
nfnl_unlock(NFNL_SUBSYS_NFTABLES);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 28 | 82.35% | 5 | 83.33% |
| Patrick McHardy | 6 | 17.65% | 1 | 16.67% |
| Total | 34 | 100.00% | 6 | 100.00% |
EXPORT_SYMBOL_GPL(nft_register_set);
void nft_unregister_set(struct nft_set_type *type)
{
nfnl_lock(NFNL_SUBSYS_NFTABLES);
list_del_rcu(&type->list);
nfnl_unlock(NFNL_SUBSYS_NFTABLES);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 23 | 82.14% | 5 | 83.33% |
| Patrick McHardy | 5 | 17.86% | 1 | 16.67% |
| Total | 28 | 100.00% | 6 | 100.00% |
EXPORT_SYMBOL_GPL(nft_unregister_set);
#define NFT_SET_FEATURES (NFT_SET_INTERVAL | NFT_SET_MAP | \
NFT_SET_TIMEOUT | NFT_SET_OBJECT)
static bool nft_set_ops_candidate(const struct nft_set_ops *ops, u32 flags)
{
return (flags & ops->features) == (flags & NFT_SET_FEATURES);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 30 | 100.00% | 1 | 100.00% |
| Total | 30 | 100.00% | 1 | 100.00% |
/*
* Select a set implementation based on the data characteristics and the
* given policy. The total memory use might not be known if no size is
* given, in that case the amount of memory per element is used.
*/
static const struct nft_set_ops *
nft_select_set_ops(const struct nft_ctx *ctx,
const struct nlattr * const nla[],
const struct nft_set_desc *desc,
enum nft_set_policies policy)
{
const struct nft_set_ops *ops, *bops;
struct nft_set_estimate est, best;
const struct nft_set_type *type;
u32 flags = 0;
#ifdef CONFIG_MODULES
if (list_empty(&nf_tables_set_types)) {
nfnl_unlock(NFNL_SUBSYS_NFTABLES);
request_module("nft-set");
nfnl_lock(NFNL_SUBSYS_NFTABLES);
if (!list_empty(&nf_tables_set_types))
return ERR_PTR(-EAGAIN);
}
#endif
if (nla[NFTA_SET_FLAGS] != NULL)
flags = ntohl(nla_get_be32(nla[NFTA_SET_FLAGS]));
bops = NULL;
best.size = ~0;
best.lookup = ~0;
best.space = ~0;
list_for_each_entry(type, &nf_tables_set_types, list) {
if (!type->select_ops)
ops = type->ops;
else
ops = type->select_ops(ctx, desc, flags);
if (!ops)
continue;
if (!nft_set_ops_candidate(ops, flags))
continue;
if (!ops->estimate(desc, flags, &est))
continue;
switch (policy) {
case NFT_SET_POL_PERFORMANCE:
if (est.lookup < best.lookup)
break;
if (est.lookup == best.lookup) {
if (!desc->size) {
if (est.space < best.space)
break;
} else if (est.size < best.size) {
break;
}
}
continue;
case NFT_SET_POL_MEMORY:
if (!desc->size) {
if (est.space < best.space)
break;
if (est.space == best.space &&
est.lookup < best.lookup)
break;
} else if (est.size < best.size) {
break;
}
continue;
default:
break;
}
if (!try_module_get(type->owner))
continue;
if (bops != NULL)
module_put(bops->type->owner);
bops = ops;
best = est;
}
if (bops != NULL)
return bops;
return ERR_PTR(-EOPNOTSUPP);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 310 | 77.89% | 6 | 66.67% |
| Patrick McHardy | 88 | 22.11% | 3 | 33.33% |
| Total | 398 | 100.00% | 9 | 100.00% |
static const struct nla_policy nft_set_policy[NFTA_SET_MAX + 1] = {
[NFTA_SET_TABLE] = { .type = NLA_STRING,
.len = NFT_TABLE_MAXNAMELEN - 1 },
[NFTA_SET_NAME] = { .type = NLA_STRING,
.len = NFT_SET_MAXNAMELEN - 1 },
[NFTA_SET_FLAGS] = { .type = NLA_U32 },
[NFTA_SET_KEY_TYPE] = { .type = NLA_U32 },
[NFTA_SET_KEY_LEN] = { .type = NLA_U32 },
[NFTA_SET_DATA_TYPE] = { .type = NLA_U32 },
[NFTA_SET_DATA_LEN] = { .type = NLA_U32 },
[NFTA_SET_POLICY] = { .type = NLA_U32 },
[NFTA_SET_DESC] = { .type = NLA_NESTED },
[NFTA_SET_ID] = { .type = NLA_U32 },
[NFTA_SET_TIMEOUT] = { .type = NLA_U64 },
[NFTA_SET_GC_INTERVAL] = { .type = NLA_U32 },
[NFTA_SET_USERDATA] = { .type = NLA_BINARY,
.len = NFT_USERDATA_MAXLEN },
[NFTA_SET_OBJ_TYPE] = { .type = NLA_U32 },
};
static const struct nla_policy nft_set_desc_policy[NFTA_SET_DESC_MAX + 1] = {
[NFTA_SET_DESC_SIZE] = { .type = NLA_U32 },
};
static int nft_ctx_init_from_setattr(struct nft_ctx *ctx, struct net *net,
const struct sk_buff *skb,
const struct nlmsghdr *nlh,
const struct nlattr * const nla[],
u8 genmask)
{
const struct nfgenmsg *nfmsg = nlmsg_data(nlh);
struct nft_af_info *afi = NULL;
struct nft_table *table = NULL;
if (nfmsg->nfgen_family != NFPROTO_UNSPEC) {
afi = nf_tables_afinfo_lookup(net, nfmsg->nfgen_family, false);
if (IS_ERR(afi))
return PTR_ERR(afi);
}
if (nla[NFTA_SET_TABLE] != NULL) {
if (afi == NULL)
return -EAFNOSUPPORT;
table = nf_tables_table_lookup(afi, nla[NFTA_SET_TABLE],
genmask);
if (IS_ERR(table))
return PTR_ERR(table);
}
nft_ctx_init(ctx, net, skb, nlh, afi, table, NULL, nla);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 142 | 83.53% | 3 | 37.50% |
| Pablo Neira Ayuso | 28 | 16.47% | 5 | 62.50% |
| Total | 170 | 100.00% | 8 | 100.00% |
static struct nft_set *nf_tables_set_lookup(const struct nft_table *table,
const struct nlattr *nla, u8 genmask)
{
struct nft_set *set;
if (nla == NULL)
return ERR_PTR(-EINVAL);
list_for_each_entry(set, &table->sets, list) {
if (!nla_strcmp(nla, set->name) &&
nft_active_genmask(set, genmask))
return set;
}
return ERR_PTR(-ENOENT);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 69 | 86.25% | 1 | 33.33% |
| Pablo Neira Ayuso | 11 | 13.75% | 2 | 66.67% |
| Total | 80 | 100.00% | 3 | 100.00% |
static struct nft_set *nf_tables_set_lookup_byid(const struct net *net,
const struct nlattr *nla,
u8 genmask)
{
struct nft_trans *trans;
u32 id = ntohl(nla_get_be32(nla));
list_for_each_entry(trans, &net->nft.commit_list, list) {
struct nft_set *set = nft_trans_set(trans);
if (trans->msg_type == NFT_MSG_NEWSET &&
id == nft_trans_set_id(trans) &&
nft_active_genmask(set, genmask))
return set;
}
return ERR_PTR(-ENOENT);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 91 | 100.00% | 3 | 100.00% |
| Total | 91 | 100.00% | 3 | 100.00% |
struct nft_set *nft_set_lookup(const struct net *net,
const struct nft_table *table,
const struct nlattr *nla_set_name,
const struct nlattr *nla_set_id,
u8 genmask)
{
struct nft_set *set;
set = nf_tables_set_lookup(table, nla_set_name, genmask);
if (IS_ERR(set)) {
if (!nla_set_id)
return set;
set = nf_tables_set_lookup_byid(net, nla_set_id, genmask);
}
return set;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 81 | 100.00% | 1 | 100.00% |
| Total | 81 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL_GPL(nft_set_lookup);
static int nf_tables_set_alloc_name(struct nft_ctx *ctx, struct nft_set *set,
const char *name)
{
const struct nft_set *i;
const char *p;
unsigned long *inuse;
unsigned int n = 0, min = 0;
p = strchr(name, '%');
if (p != NULL) {
if (p[1] != 'd' || strchr(p + 2, '%'))
return -EINVAL;
inuse = (unsigned long *)get_zeroed_page(GFP_KERNEL);
if (inuse == NULL)
return -ENOMEM;
cont:
list_for_each_entry(i, &ctx->table->sets, list) {
int tmp;
if (!nft_is_active_next(ctx->net, set))
continue;
if (!sscanf(i->name, name, &tmp))
continue;
if (tmp < min || tmp >= min + BITS_PER_BYTE * PAGE_SIZE)
continue;
set_bit(tmp - min, inuse);
}
n = find_first_zero_bit(inuse, BITS_PER_BYTE * PAGE_SIZE);
if (n >= BITS_PER_BYTE * PAGE_SIZE) {
min += BITS_PER_BYTE * PAGE_SIZE;
memset(inuse, 0, PAGE_SIZE);
goto cont;
}
free_page((unsigned long)inuse);
}
set->name = kasprintf(GFP_KERNEL, name, min + n);
if (!set->name)
return -ENOMEM;
list_for_each_entry(i, &ctx->table->sets, list) {
if (!nft_is_active_next(ctx->net, i))
continue;
if (!strcmp(set->name, i->name)) {
kfree(set->name);
return -ENFILE;
}
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 242 | 79.87% | 3 | 37.50% |
| Pablo Neira Ayuso | 30 | 9.90% | 2 | 25.00% |
| Phil Sutter | 15 | 4.95% | 1 | 12.50% |
| Arvind Yadav | 9 | 2.97% | 1 | 12.50% |
| Daniel Borkmann | 7 | 2.31% | 1 | 12.50% |
| Total | 303 | 100.00% | 8 | 100.00% |
static int nf_tables_fill_set(struct sk_buff *skb, const struct nft_ctx *ctx,
const struct nft_set *set, u16 event, u16 flags)
{
struct nfgenmsg *nfmsg;
struct nlmsghdr *nlh;
struct nlattr *desc;
u32 portid = ctx->portid;
u32 seq = ctx->seq;
event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct nfgenmsg),
flags);
if (nlh == NULL)
goto nla_put_failure;
nfmsg = nlmsg_data(nlh);
nfmsg->nfgen_family = ctx->afi->family;
nfmsg->version = NFNETLINK_V0;
nfmsg->res_id = htons(ctx->net->nft.base_seq & 0xffff);
if (nla_put_string(skb, NFTA_SET_TABLE, ctx->table->name))
goto nla_put_failure;
if (nla_put_string(skb, NFTA_SET_NAME, set->name))
goto nla_put_failure;
if (set->flags != 0)
if (nla_put_be32(skb, NFTA_SET_FLAGS, htonl(set->flags)))
goto nla_put_failure;
if (nla_put_be32(skb, NFTA_SET_KEY_TYPE, htonl(set->ktype)))
goto nla_put_failure;
if (nla_put_be32(skb, NFTA_SET_KEY_LEN, htonl(set->klen)))
goto nla_put_failure;
if (set->flags & NFT_SET_MAP) {
if (nla_put_be32(skb, NFTA_SET_DATA_TYPE, htonl(set->dtype)))
goto nla_put_failure;
if (nla_put_be32(skb, NFTA_SET_DATA_LEN, htonl(set->dlen)))
goto nla_put_failure;
}
if (set->flags & NFT_SET_OBJECT &&
nla_put_be32(skb, NFTA_SET_OBJ_TYPE, htonl(set->objtype)))
goto nla_put_failure;
if (set->timeout &&
nla_put_be64(skb, NFTA_SET_TIMEOUT,
cpu_to_be64(jiffies_to_msecs(set->timeout)),
NFTA_SET_PAD))
goto nla_put_failure;
if (set->gc_int &&
nla_put_be32(skb, NFTA_SET_GC_INTERVAL, htonl(set->gc_int)))
goto nla_put_failure;
if (set->policy != NFT_SET_POL_PERFORMANCE) {
if (nla_put_be32(skb, NFTA_SET_POLICY, htonl(set->policy)))
goto nla_put_failure;
}
if (nla_put(skb, NFTA_SET_USERDATA, set->udlen, set->udata))
goto nla_put_failure;
desc = nla_nest_start(skb, NFTA_SET_DESC);
if (desc == NULL)
goto nla_put_failure;
if (set->size &&
nla_put_be32(skb, NFTA_SET_DESC_SIZE, htonl(set->size)))
goto nla_put_failure;
nla_nest_end(skb, desc);
nlmsg_end(skb, nlh);
return 0;
nla_put_failure:
nlmsg_trim(skb, nlh);
return -1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 379 | 78.96% | 3 | 25.00% |
| Pablo Neira Ayuso | 44 | 9.17% | 4 | 33.33% |
| Arturo Borrero Gonzalez | 29 | 6.04% | 1 | 8.33% |
| Carlos Falgueras García | 20 | 4.17% | 1 | 8.33% |
| Johannes Berg | 3 | 0.62% | 1 | 8.33% |
| Anders K. Pedersen | 3 | 0.62% | 1 | 8.33% |
| Nicolas Dichtel | 2 | 0.42% | 1 | 8.33% |
| Total | 480 | 100.00% | 12 | 100.00% |
static void nf_tables_set_notify(const struct nft_ctx *ctx,
const struct nft_set *set, int event,
gfp_t gfp_flags)
{
struct sk_buff *skb;
u32 portid = ctx->portid;
int err;
if (!ctx->report &&
!nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
return;
skb = nlmsg_new(NLMSG_GOODSIZE, gfp_flags);
if (skb == NULL)
goto err;
err = nf_tables_fill_set(skb, ctx, set, event, 0);
if (err < 0) {
kfree_skb(skb);
goto err;
}
nfnetlink_send(skb, ctx->net, portid, NFNLGRP_NFTABLES, ctx->report,
gfp_flags);
return;
err:
nfnetlink_set_err(ctx->net, portid, NFNLGRP_NFTABLES, -ENOBUFS);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 122 | 85.92% | 1 | 20.00% |
| Pablo Neira Ayuso | 20 | 14.08% | 4 | 80.00% |
| Total | 142 | 100.00% | 5 | 100.00% |
static int nf_tables_dump_sets(struct sk_buff *skb, struct netlink_callback *cb)
{
const struct nft_set *set;
unsigned int idx, s_idx = cb->args[0];
struct nft_af_info *afi;
struct nft_table *table, *cur_table = (struct nft_table *)cb->args[2];
struct net *net = sock_net(skb->sk);
int cur_family = cb->args[3];
struct nft_ctx *ctx = cb->data, ctx_set;
if (cb->args[1])
return skb->len;
rcu_read_lock();
cb->seq = net->nft.base_seq;
list_for_each_entry_rcu(afi, &net->nft.af_info, list) {
if (ctx->afi && ctx->afi != afi)
continue;
if (cur_family) {
if (afi->family != cur_family)
continue;
cur_family = 0;
}
list_for_each_entry_rcu(table, &afi->tables, list) {
if (ctx->table && ctx->table != table)
continue;
if (cur_table) {
if (cur_table != table)
continue;
cur_table = NULL;
}
idx = 0;
list_for_each_entry_rcu(set, &table->sets, list) {
if (idx < s_idx)
goto cont;
if (!nft_is_active(net, set))
goto cont;
ctx_set = *ctx;
ctx_set.table = table;
ctx_set.afi = afi;
if (nf_tables_fill_set(skb, &ctx_set, set,
NFT_MSG_NEWSET,
NLM_F_MULTI) < 0) {
cb->args[0] = idx;
cb->args[2] = (unsigned long) table;
cb->args[3] = afi->family;
goto done;
}
nl_dump_check_consistent(cb, nlmsg_hdr(skb));
cont:
idx++;
}
if (s_idx)
s_idx = 0;
}
}
cb->args[1] = 1;
done:
rcu_read_unlock();
return skb->len;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 353 | 100.00% | 5 | 100.00% |
| Total | 353 | 100.00% | 5 | 100.00% |
static int nf_tables_dump_sets_done(struct netlink_callback *cb)
{
kfree(cb->data);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 18 | 85.71% | 1 | 50.00% |
| Pablo Neira Ayuso | 3 | 14.29% | 1 | 50.00% |
| Total | 21 | 100.00% | 2 | 100.00% |
static int nf_tables_getset(struct net *net, struct sock *nlsk,
struct sk_buff *skb, const struct nlmsghdr *nlh,
const struct nlattr * const nla[],
struct netlink_ext_ack *extack)
{
u8 genmask = nft_genmask_cur(net);
const struct nft_set *set;
struct nft_ctx ctx;
struct sk_buff *skb2;
const struct nfgenmsg *nfmsg = nlmsg_data(nlh);
int err;
/* Verify existence before starting dump */
err = nft_ctx_init_from_setattr(&ctx, net, skb, nlh, nla, genmask);
if (err < 0)
return err;
if (nlh->nlmsg_flags & NLM_F_DUMP) {
struct netlink_dump_control c = {
.dump = nf_tables_dump_sets,
.done = nf_tables_dump_sets_done,
};
struct nft_ctx *ctx_dump;
ctx_dump = kmalloc(sizeof(*ctx_dump), GFP_KERNEL);
if (ctx_dump == NULL)
return -ENOMEM;
*ctx_dump = ctx;
c.data = ctx_dump;
return netlink_dump_start(nlsk, skb, nlh, &c);
}
/* Only accept unspec with dump */
if (nfmsg->nfgen_family == NFPROTO_UNSPEC)
return -EAFNOSUPPORT;
if (!nla[NFTA_SET_TABLE])
return -EINVAL;
set = nf_tables_set_lookup(ctx.table, nla[NFTA_SET_NAME], genmask);
if (IS_ERR(set))
return PTR_ERR(set);
skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
if (skb2 == NULL)
return -ENOMEM;
err = nf_tables_fill_set(skb2, &ctx, set, NFT_MSG_NEWSET, 0);
if (err < 0)
goto err;
return nlmsg_unicast(nlsk, skb2, NETLINK_CB(skb).portid);
err:
kfree_skb(skb2);
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 201 | 65.69% | 1 | 10.00% |
| Pablo Neira Ayuso | 92 | 30.07% | 7 | 70.00% |
| Phil Turnbull | 12 | 3.92% | 1 | 10.00% |
| Stephen Hemminger | 1 | 0.33% | 1 | 10.00% |
| Total | 306 | 100.00% | 10 | 100.00% |
static int nf_tables_set_desc_parse(const struct nft_ctx *ctx,
struct nft_set_desc *desc,
const struct nlattr *nla)
{
struct nlattr *da[NFTA_SET_DESC_MAX + 1];
int err;
err = nla_parse_nested(da, NFTA_SET_DESC_MAX, nla,
nft_set_desc_policy, NULL);
if (err < 0)
return err;
if (da[NFTA_SET_DESC_SIZE] != NULL)
desc->size = ntohl(nla_get_be32(da[NFTA_SET_DESC_SIZE]));
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 82 | 94.25% | 2 | 50.00% |
| Pablo Neira Ayuso | 3 | 3.45% | 1 | 25.00% |
| Johannes Berg | 2 | 2.30% | 1 | 25.00% |
| Total | 87 | 100.00% | 4 | 100.00% |
static int nf_tables_newset(struct net *net, struct sock *nlsk,
struct sk_buff *skb, const struct nlmsghdr *nlh,
const struct nlattr * const nla[],
struct netlink_ext_ack *extack)
{
const struct nfgenmsg *nfmsg = nlmsg_data(nlh);
u8 genmask = nft_genmask_next(net);
const struct nft_set_ops *ops;
struct nft_af_info *afi;
struct nft_table *table;
struct nft_set *set;
struct nft_ctx ctx;
char *name;
unsigned int size;
bool create;
u64 timeout;
u32 ktype, dtype, flags, policy, gc_int, objtype;
struct nft_set_desc desc;
unsigned char *udata;
u16 udlen;
int err;
if (nla[NFTA_SET_TABLE] == NULL ||
nla[NFTA_SET_NAME] == NULL ||
nla[NFTA_SET_KEY_LEN] == NULL ||
nla[NFTA_SET_ID] == NULL)
return -EINVAL;
memset(&desc, 0, sizeof(desc));
ktype = NFT_DATA_VALUE;
if (nla[NFTA_SET_KEY_TYPE] != NULL) {
ktype = ntohl(nla_get_be32(nla[NFTA_SET_KEY_TYPE]));
if ((ktype & NFT_DATA_RESERVED_MASK) == NFT_DATA_RESERVED_MASK)
return -EINVAL;
}
desc.klen = ntohl(nla_get_be32(nla[NFTA_SET_KEY_LEN]));
if (desc.klen == 0 || desc.klen > NFT_DATA_VALUE_MAXLEN)
return -EINVAL;
flags = 0;
if (nla[NFTA_SET_FLAGS] != NULL) {
flags = ntohl(nla_get_be32(nla[NFTA_SET_FLAGS]));
if (flags & ~(NFT_SET_ANONYMOUS | NFT_SET_CONSTANT |
NFT_SET_INTERVAL | NFT_SET_TIMEOUT |
NFT_SET_MAP | NFT_SET_EVAL |
NFT_SET_OBJECT))
return -EINVAL;
/* Only one of these operations is supported */
if ((flags & (NFT_SET_MAP | NFT_SET_EVAL | NFT_SET_OBJECT)) ==
(NFT_SET_MAP | NFT_SET_EVAL | NFT_SET_OBJECT))
return -EOPNOTSUPP;
}
dtype = 0;
if (nla[NFTA_SET_DATA_TYPE] != NULL) {
if (!(flags & NFT_SET_MAP))
return -EINVAL;
dtype = ntohl(nla_get_be32(nla[NFTA_SET_DATA_TYPE]));
if ((dtype & NFT_DATA_RESERVED_MASK) == NFT_DATA_RESERVED_MASK &&
dtype != NFT_DATA_VERDICT)
return -EINVAL;
if (dtype != NFT_DATA_VERDICT) {
if (nla[NFTA_SET_DATA_LEN] == NULL)
return -EINVAL;
desc.dlen = ntohl(nla_get_be32(nla[NFTA_SET_DATA_LEN]));
if (desc.dlen == 0 || desc.dlen > NFT_DATA_VALUE_MAXLEN)
return -EINVAL;
} else
desc.dlen = sizeof(struct nft_verdict);
} else if (flags & NFT_SET_MAP)
return -EINVAL;
if (nla[NFTA_SET_OBJ_TYPE] != NULL) {
if (!(flags & NFT_SET_OBJECT))
return -EINVAL;
objtype = ntohl(nla_get_be32(nla[NFTA_SET_OBJ_TYPE]));
if (objtype == NFT_OBJECT_UNSPEC ||
objtype > NFT_OBJECT_MAX)
return -EINVAL;
} else if (flags & NFT_SET_OBJECT)
return -EINVAL;
else
objtype = NFT_OBJECT_UNSPEC;
timeout = 0;
if (nla[NFTA_SET_TIMEOUT] != NULL) {
if (!(flags & NFT_SET_TIMEOUT))
return -EINVAL;
timeout = msecs_to_jiffies(be64_to_cpu(nla_get_be64(
nla[NFTA_SET_TIMEOUT])));
}
gc_int = 0;
if (nla[NFTA_SET_GC_INTERVAL] != NULL) {
if (!(flags & NFT_SET_TIMEOUT))
return -EINVAL;
gc_int = ntohl(nla_get_be32(nla[NFTA_SET_GC_INTERVAL]));
}
policy = NFT_SET_POL_PERFORMANCE;
if (nla[NFTA_SET_POLICY] != NULL)
policy = ntohl(nla_get_be32(nla[NFTA_SET_POLICY]));
if (nla[NFTA_SET_DESC] != NULL) {
err = nf_tables_set_desc_parse(&ctx, &desc, nla[NFTA_SET_DESC]);
if (err < 0)
return err;
}
create = nlh->nlmsg_flags & NLM_F_CREATE ? true : false;
afi = nf_tables_afinfo_lookup(net, nfmsg->nfgen_family, create);
if (IS_ERR(afi))
return PTR_ERR(afi);
table = nf_tables_table_lookup(afi, nla[NFTA_SET_TABLE], genmask);
if (IS_ERR(table))
return PTR_ERR(table);
nft_ctx_init(&ctx, net, skb, nlh, afi, table, NULL, nla);
set = nf_tables_set_lookup(table, nla[NFTA_SET_NAME], genmask);
if (IS_ERR(set)) {
if (PTR_ERR(set) != -ENOENT)
return PTR_ERR(set);
} else {
if (nlh->nlmsg_flags & NLM_F_EXCL)
return -EEXIST;
if (nlh->nlmsg_flags & NLM_F_REPLACE)
return -EOPNOTSUPP;
return 0;
}
if (!(nlh->nlmsg_flags & NLM_F_CREATE))
return -ENOENT;
ops = nft_select_set_ops(&ctx, nla, &desc, policy);
if (IS_ERR(ops))
return PTR_ERR(ops);
udlen = 0;
if (nla[NFTA_SET_USERDATA])
udlen = nla_len(nla[NFTA_SET_USERDATA]);
size = 0;
if (ops->privsize != NULL)
size = ops->privsize(nla, &desc);
set = kvzalloc(sizeof(*set) + size + udlen, GFP_KERNEL);
if (!set) {
err = -ENOMEM;
goto err1;
}
name = nla_strdup(nla[NFTA_SET_NAME], GFP_KERNEL);
if (!name) {
err = -ENOMEM;
goto err2;
}
err = nf_tables_set_alloc_name(&ctx, set, name);
kfree(name);
if (err < 0)
goto err2;
udata = NULL;
if (udlen) {
udata = set->data + size;
nla_memcpy(udata, nla[NFTA_SET_USERDATA], udlen);
}
INIT_LIST_HEAD(&set->bindings);
set->ops = ops;
set->ktype = ktype;
set->klen = desc.klen;
set->dtype = dtype;
set->objtype = objtype;
set->dlen = desc.dlen;
set->flags = flags;
set->size = desc.size;
set->policy = policy;
set->udlen = udlen;
set->udata = udata;
set->timeout = timeout;
set->gc_int = gc_int;
err = ops->init(set, &desc, nla);
if (err < 0)
goto err2;
err = nft_trans_set_add(&ctx, NFT_MSG_NEWSET, set);
if (err < 0)
goto err3;
list_add_tail_rcu(&set->list, &table->sets);
table->use++;
return 0;
err3:
ops->destroy(set);
err2:
kvfree(set);
err1:
module_put(ops->type->owner);
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 942 | 77.15% | 5 | 20.83% |
| Pablo Neira Ayuso | 161 | 13.19% | 13 | 54.17% |
| Carlos Falgueras García | 73 | 5.98% | 1 | 4.17% |
| Phil Sutter | 25 | 2.05% | 1 | 4.17% |
| Liping Zhang | 10 | 0.82% | 1 | 4.17% |
| Arturo Borrero Gonzalez | 6 | 0.49% | 1 | 4.17% |
| Anders K. Pedersen | 3 | 0.25% | 1 | 4.17% |
| Gao Feng | 1 | 0.08% | 1 | 4.17% |
| Total | 1221 | 100.00% | 24 | 100.00% |
static void nft_set_destroy(struct nft_set *set)
{
set->ops->destroy(set);
module_put(set->ops->type->owner);
kfree(set->name);
kvfree(set);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 36 | 83.72% | 3 | 75.00% |
| Phil Sutter | 7 | 16.28% | 1 | 25.00% |
| Total | 43 | 100.00% | 4 | 100.00% |
static void nf_tables_set_destroy(const struct nft_ctx *ctx, struct nft_set *set)
{
list_del_rcu(&set->list);
nf_tables_set_notify(ctx, set, NFT_MSG_DELSET, GFP_ATOMIC);
nft_set_destroy(set);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 37 | 90.24% | 1 | 25.00% |
| Pablo Neira Ayuso | 4 | 9.76% | 3 | 75.00% |
| Total | 41 | 100.00% | 4 | 100.00% |
static int nf_tables_delset(struct net *net, struct sock *nlsk,
struct sk_buff *skb, const struct nlmsghdr *nlh,
const struct nlattr * const nla[],
struct netlink_ext_ack *extack)
{
const struct nfgenmsg *nfmsg = nlmsg_data(nlh);
u8 genmask = nft_genmask_next(net);
struct nft_set *set;
struct nft_ctx ctx;
int err;
if (nfmsg->nfgen_family == NFPROTO_UNSPEC)
return -EAFNOSUPPORT;
if (nla[NFTA_SET_TABLE] == NULL)
return -EINVAL;
err = nft_ctx_init_from_setattr(&ctx, net, skb, nlh, nla, genmask);
if (err < 0)
return err;
set = nf_tables_set_lookup(ctx.table, nla[NFTA_SET_NAME], genmask);
if (IS_ERR(set))
return PTR_ERR(set);
if (!list_empty(&set->bindings) ||
(nlh->nlmsg_flags & NLM_F_NONREC && atomic_read(&set->nelems) > 0))
return -EBUSY;
return nft_delset(&ctx, set);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 139 | 71.65% | 2 | 22.22% |
| Pablo Neira Ayuso | 53 | 27.32% | 6 | 66.67% |
| Arturo Borrero Gonzalez | 2 | 1.03% | 1 | 11.11% |
| Total | 194 | 100.00% | 9 | 100.00% |
static int nf_tables_bind_check_setelem(const struct nft_ctx *ctx,
struct nft_set *set,
const struct nft_set_iter *iter,
struct nft_set_elem *elem)
{
const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
enum nft_registers dreg;
dreg = nft_type_to_reg(set->dtype);
return nft_validate_register_store(ctx, dreg, nft_set_ext_data(ext),
set->dtype == NFT_DATA_VERDICT ?
NFT_DATA_VERDICT : NFT_DATA_VALUE,
set->dlen);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 77 | 92.77% | 4 | 80.00% |
| Pablo Neira Ayuso | 6 | 7.23% | 1 | 20.00% |
| Total | 83 | 100.00% | 5 | 100.00% |
int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set,
struct nft_set_binding *binding)
{
struct nft_set_binding *i;
struct nft_set_iter iter;
if (!list_empty(&set->bindings) && set->flags & NFT_SET_ANONYMOUS)
return -EBUSY;
if (binding->flags & NFT_SET_MAP) {
/* If the set is already bound to the same chain all
* jumps are already validated for that chain.
*/
list_for_each_entry(i, &set->bindings, list) {
if (i->flags & NFT_SET_MAP &&
i->chain == binding->chain)
goto bind;
}
iter.genmask = nft_genmask_next(ctx->net);
iter.skip = 0;
iter.count = 0;
iter.err = 0;
iter.fn = nf_tables_bind_check_setelem;
set->ops->walk(ctx, set, &iter);
if (iter.err < 0)
return iter.err;
}
bind:
binding->chain = ctx->chain;
list_add_tail_rcu(&binding->list, &set->bindings);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 166 | 92.74% | 2 | 40.00% |
| Pablo Neira Ayuso | 12 | 6.70% | 2 | 40.00% |
| Liping Zhang | 1 | 0.56% | 1 | 20.00% |
| Total | 179 | 100.00% | 5 | 100.00% |
EXPORT_SYMBOL_GPL(nf_tables_bind_set);
void nf_tables_unbind_set(const struct nft_ctx *ctx, struct nft_set *set,
struct nft_set_binding *binding)
{
list_del_rcu(&binding->list);
if (list_empty(&set->bindings) && set->flags & NFT_SET_ANONYMOUS &&
nft_is_active(ctx->net, set))
nf_tables_set_destroy(ctx, set);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 51 | 83.61% | 1 | 25.00% |
| Pablo Neira Ayuso | 10 | 16.39% | 3 | 75.00% |
| Total | 61 | 100.00% | 4 | 100.00% |
EXPORT_SYMBOL_GPL(nf_tables_unbind_set);
const struct nft_set_ext_type nft_set_ext_types[] = {
[NFT_SET_EXT_KEY] = {
.align = __alignof__(u32),
},
[NFT_SET_EXT_DATA] = {
.align = __alignof__(u32),
},
[NFT_SET_EXT_EXPR] = {
.align = __alignof__(struct nft_expr),
},
[NFT_SET_EXT_OBJREF] = {
.len = sizeof(struct nft_object *),
.align = __alignof__(struct nft_object *),
},
[NFT_SET_EXT_FLAGS] = {
.len = sizeof(u8),
.align = __alignof__(u8),
},
[NFT_SET_EXT_TIMEOUT] = {
.len = sizeof(u64),
.align = __alignof__(u64),
},
[NFT_SET_EXT_EXPIRATION] = {
.len = sizeof(unsigned long),
.align = __alignof__(unsigned long),
},
[NFT_SET_EXT_USERDATA] = {
.len = sizeof(struct nft_userdata),
.align = __alignof__(struct nft_userdata),
},
};
EXPORT_SYMBOL_GPL(nft_set_ext_types);
/*
* Set elements
*/
static const struct nla_policy nft_set_elem_policy[NFTA_SET_ELEM_MAX + 1] = {
[NFTA_SET_ELEM_KEY] = { .type = NLA_NESTED },
[NFTA_SET_ELEM_DATA] = { .type = NLA_NESTED },
[NFTA_SET_ELEM_FLAGS] = { .type = NLA_U32 },
[NFTA_SET_ELEM_TIMEOUT] = { .type = NLA_U64 },
[NFTA_SET_ELEM_USERDATA] = { .type = NLA_BINARY,
.len = NFT_USERDATA_MAXLEN },
};
static const struct nla_policy nft_set_elem_list_policy[NFTA_SET_ELEM_LIST_MAX + 1] = {
[NFTA_SET_ELEM_LIST_TABLE] = { .type = NLA_STRING,
.len = NFT_TABLE_MAXNAMELEN - 1 },
[NFTA_SET_ELEM_LIST_SET] = { .type = NLA_STRING,
.len = NFT_SET_MAXNAMELEN - 1 },
[NFTA_SET_ELEM_LIST_ELEMENTS] = { .type = NLA_NESTED },
[NFTA_SET_ELEM_LIST_SET_ID] = { .type = NLA_U32 },
};
static int nft_ctx_init_from_elemattr(struct nft_ctx *ctx, struct net *net,
const struct sk_buff *skb,
const struct nlmsghdr *nlh,
const struct nlattr * const nla[],
u8 genmask)
{
const struct nfgenmsg *nfmsg = nlmsg_data(nlh);
struct nft_af_info *afi;
struct nft_table *table;
afi = nf_tables_afinfo_lookup(net, nfmsg->nfgen_family, false);
if (IS_ERR(afi))
return PTR_ERR(afi);
table = nf_tables_table_lookup(afi, nla[NFTA_SET_ELEM_LIST_TABLE],
genmask);
if (IS_ERR(table))
return PTR_ERR(table);
nft_ctx_init(ctx, net, skb, nlh, afi, table, NULL, nla);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 119 | 88.15% | 1 | 20.00% |
| Pablo Neira Ayuso | 16 | 11.85% | 4 | 80.00% |
| Total | 135 | 100.00% | 5 | 100.00% |
static int nf_tables_fill_setelem(struct sk_buff *skb,
const struct nft_set *set,
const struct nft_set_elem *elem)
{
const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
unsigned char *b = skb_tail_pointer(skb);
struct nlattr *nest;
nest = nla_nest_start(skb, NFTA_LIST_ELEM);
if (nest == NULL)
goto nla_put_failure;
if (nft_data_dump(skb, NFTA_SET_ELEM_KEY, nft_set_ext_key(ext),
NFT_DATA_VALUE, set->klen) < 0)
goto nla_put_failure;
if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) &&
nft_data_dump(skb, NFTA_SET_ELEM_DATA, nft_set_ext_data(ext),
set->dtype == NFT_DATA_VERDICT ? NFT_DATA_VERDICT : NFT_DATA_VALUE,
set->dlen) < 0)
goto nla_put_failure;
if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPR) &&
nft_expr_dump(skb, NFTA_SET_ELEM_EXPR, nft_set_ext_expr(ext)) < 0)
goto nla_put_failure;
if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF) &&
nla_put_string(skb, NFTA_SET_ELEM_OBJREF,
(*nft_set_ext_obj(ext))->name) < 0)
goto nla_put_failure;
if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
nla_put_be32(skb, NFTA_SET_ELEM_FLAGS,
htonl(*nft_set_ext_flags(ext))))
goto nla_put_failure;
if (nft_set_ext_exists(ext, NFT_SET_EXT_TIMEOUT) &&
nla_put_be64(skb, NFTA_SET_ELEM_TIMEOUT,
cpu_to_be64(jiffies_to_msecs(
*nft_set_ext_timeout(ext))),
NFTA_SET_ELEM_PAD))
goto nla_put_failure;
if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION)) {
unsigned long expires, now = jiffies;
expires = *nft_set_ext_expiration(ext);
if (time_before(now, expires))
expires -= now;
else
expires = 0;
if (nla_put_be64(skb, NFTA_SET_ELEM_EXPIRATION,
cpu_to_be64(jiffies_to_msecs(expires)),
NFTA_SET_ELEM_PAD))
goto nla_put_failure;
}
if (nft_set_ext_exists(ext, NFT_SET_EXT_USERDATA)) {
struct nft_userdata *udata;
udata = nft_set_ext_userdata(ext);
if (nla_put(skb, NFTA_SET_ELEM_USERDATA,
udata->len + 1, udata->data))
goto nla_put_failure;
}
nla_nest_end(skb, nest);
return 0;
nla_put_failure:
nlmsg_trim(skb, b);
return -EMSGSIZE;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 351 | 90.23% | 5 | 62.50% |
| Pablo Neira Ayuso | 31 | 7.97% | 1 | 12.50% |
| Nicolas Dichtel | 4 | 1.03% | 1 | 12.50% |
| Anders K. Pedersen | 3 | 0.77% | 1 | 12.50% |
| Total | 389 | 100.00% | 8 | 100.00% |
struct nft_set_dump_args {
const struct netlink_callback *cb;
struct nft_set_iter iter;
struct sk_buff *skb;
};
static int nf_tables_dump_setelem(const struct nft_ctx *ctx,
struct nft_set *set,
const struct nft_set_iter *iter,
struct nft_set_elem *elem)
{
struct nft_set_dump_args *args;
args = container_of(iter, struct nft_set_dump_args, iter);
return nf_tables_fill_setelem(args->skb, set, elem);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 57 | 100.00% | 1 | 100.00% |
| Total | 57 | 100.00% | 1 | 100.00% |
struct nft_set_dump_ctx {
const struct nft_set *set;
struct nft_ctx ctx;
};
static int nf_tables_dump_set(struct sk_buff *skb, struct netlink_callback *cb)
{
struct nft_set_dump_ctx *dump_ctx = cb->data;
struct net *net = sock_net(skb->sk);
struct nft_af_info *afi;
struct nft_table *table;
struct nft_set *set;
struct nft_set_dump_args args;
bool set_found = false;
struct nfgenmsg *nfmsg;
struct nlmsghdr *nlh;
struct nlattr *nest;
u32 portid, seq;
int event;
rcu_read_lock();
list_for_each_entry_rcu(afi, &net->nft.af_info, list) {
if (afi != dump_ctx->ctx.afi)
continue;
list_for_each_entry_rcu(table, &afi->tables, list) {
if (table != dump_ctx->ctx.table)
continue;
list_for_each_entry_rcu(set, &table->sets, list) {
if (set == dump_ctx->set) {
set_found = true;
break;
}
}
break;
}
break;
}
if (!set_found) {
rcu_read_unlock();
return -ENOENT;
}
event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, NFT_MSG_NEWSETELEM);
portid = NETLINK_CB(cb->skb).portid;
seq = cb->nlh->nlmsg_seq;
nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct nfgenmsg),
NLM_F_MULTI);
if (nlh == NULL)
goto nla_put_failure;
nfmsg = nlmsg_data(nlh);
nfmsg->nfgen_family = afi->family;
nfmsg->version = NFNETLINK_V0;
nfmsg->res_id = htons(net->nft.base_seq & 0xffff);
if (nla_put_string(skb, NFTA_SET_ELEM_LIST_TABLE, table->name))
goto nla_put_failure;
if (nla_put_string(skb, NFTA_SET_ELEM_LIST_SET, set->name))
goto nla_put_failure;
nest = nla_nest_start(skb, NFTA_SET_ELEM_LIST_ELEMENTS);
if (nest == NULL)
goto nla_put_failure;
args.cb = cb;
args.skb = skb;
args.iter.genmask = nft_genmask_cur(net);
args.iter.skip = cb->args[0];
args.iter.count = 0;
args.iter.err = 0;
args.iter.fn = nf_tables_dump_setelem;
set->ops->walk(&dump_ctx->ctx, set, &args.iter);
rcu_read_unlock();
nla_nest_end(skb, nest);
nlmsg_end(skb, nlh);
if (args.iter.err && args.iter.err != -EMSGSIZE)
return args.iter.err;
if (args.iter.count == cb->args[0])
return 0;
cb->args[0] = args.iter.count;
return skb->len;
nla_put_failure:
rcu_read_unlock();
return -ENOSPC;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 343 | 71.61% | 1 | 10.00% |
| Liping Zhang | 91 | 19.00% | 1 | 10.00% |
| Pablo Neira Ayuso | 44 | 9.19% | 7 | 70.00% |
| Johannes Berg | 1 | 0.21% | 1 | 10.00% |
| Total | 479 | 100.00% | 10 | 100.00% |
static int nf_tables_dump_set_done(struct netlink_callback *cb)
{
kfree(cb->data);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Liping Zhang | 21 | 100.00% | 1 | 100.00% |
| Total | 21 | 100.00% | 1 | 100.00% |
static int nf_tables_getsetelem(struct net *net, struct sock *nlsk,
struct sk_buff *skb, const struct nlmsghdr *nlh,
const struct nlattr * const nla[],
struct netlink_ext_ack *extack)
{
u8 genmask = nft_genmask_cur(net);
const struct nft_set *set;
struct nft_ctx ctx;
int err;
err = nft_ctx_init_from_elemattr(&ctx, net, skb, nlh, nla, genmask);
if (err < 0)
return err;
set = nf_tables_set_lookup(ctx.table, nla[NFTA_SET_ELEM_LIST_SET],
genmask);
if (IS_ERR(set))
return PTR_ERR(set);
if (nlh->nlmsg_flags & NLM_F_DUMP) {
struct netlink_dump_control c = {
.dump = nf_tables_dump_set,
.done = nf_tables_dump_set_done,
};
struct nft_set_dump_ctx *dump_ctx;
dump_ctx = kmalloc(sizeof(*dump_ctx), GFP_KERNEL);
if (!dump_ctx)
return -ENOMEM;
dump_ctx->set = set;
dump_ctx->ctx = ctx;
c.data = dump_ctx;
return netlink_dump_start(nlsk, skb, nlh, &c);
}
return -EOPNOTSUPP;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 131 | 63.90% | 1 | 14.29% |
| Liping Zhang | 50 | 24.39% | 1 | 14.29% |
| Pablo Neira Ayuso | 24 | 11.71% | 5 | 71.43% |
| Total | 205 | 100.00% | 7 | 100.00% |
static int nf_tables_fill_setelem_info(struct sk_buff *skb,
const struct nft_ctx *ctx, u32 seq,
u32 portid, int event, u16 flags,
const struct nft_set *set,
const struct nft_set_elem *elem)
{
struct nfgenmsg *nfmsg;
struct nlmsghdr *nlh;
struct nlattr *nest;
int err;
event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct nfgenmsg),
flags);
if (nlh == NULL)
goto nla_put_failure;
nfmsg = nlmsg_data(nlh);
nfmsg->nfgen_family = ctx->afi->family;
nfmsg->version = NFNETLINK_V0;
nfmsg->res_id = htons(ctx->net->nft.base_seq & 0xffff);
if (nla_put_string(skb, NFTA_SET_TABLE, ctx->table->name))
goto nla_put_failure;
if (nla_put_string(skb, NFTA_SET_NAME, set->name))
goto nla_put_failure;
nest = nla_nest_start(skb, NFTA_SET_ELEM_LIST_ELEMENTS);
if (nest == NULL)
goto nla_put_failure;
err = nf_tables_fill_setelem(skb, set, elem);
if (err < 0)
goto nla_put_failure;
nla_nest_end(skb, nest);
nlmsg_end(skb, nlh);
return 0;
nla_put_failure:
nlmsg_trim(skb, nlh);
return -1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 154 | 64.17% | 1 | 16.67% |
| Patrick McHardy | 61 | 25.42% | 1 | 16.67% |
| Pablo Neira Ayuso | 22 | 9.17% | 3 | 50.00% |
| Johannes Berg | 3 | 1.25% | 1 | 16.67% |
| Total | 240 | 100.00% | 6 | 100.00% |
static void nf_tables_setelem_notify(const struct nft_ctx *ctx,
const struct nft_set *set,
const struct nft_set_elem *elem,
int event, u16 flags)
{
struct net *net = ctx->net;
u32 portid = ctx->portid;
struct sk_buff *skb;
int err;
if (!ctx->report && !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
return;
skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
if (skb == NULL)
goto err;
err = nf_tables_fill_setelem_info(skb, ctx, 0, portid, event, flags,
set, elem);
if (err < 0) {
kfree_skb(skb);
goto err;
}
nfnetlink_send(skb, net, portid, NFNLGRP_NFTABLES, ctx->report,
GFP_KERNEL);
return;
err:
nfnetlink_set_err(net, portid, NFNLGRP_NFTABLES, -ENOBUFS);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arturo Borrero Gonzalez | 113 | 71.97% | 1 | 25.00% |
| Patrick McHardy | 32 | 20.38% | 1 | 25.00% |
| Pablo Neira Ayuso | 12 | 7.64% | 2 | 50.00% |
| Total | 157 | 100.00% | 4 | 100.00% |
static struct nft_trans *nft_trans_elem_alloc(struct nft_ctx *ctx,
int msg_type,
struct nft_set *set)
{
struct nft_trans *trans;
trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_elem));
if (trans == NULL)
return NULL;
nft_trans_elem_set(trans) = set;
return trans;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 38 | 63.33% | 1 | 50.00% |
| Patrick McHardy | 22 | 36.67% | 1 | 50.00% |
| Total | 60 | 100.00% | 2 | 100.00% |
void *nft_set_elem_init(const struct nft_set *set,
const struct nft_set_ext_tmpl *tmpl,
const u32 *key, const u32 *data,
u64 timeout, gfp_t gfp)
{
struct nft_set_ext *ext;
void *elem;
elem = kzalloc(set->ops->elemsize + tmpl->len, gfp);
if (elem == NULL)
return NULL;
ext = nft_set_elem_ext(set, elem);
nft_set_ext_init(ext, tmpl);
memcpy(nft_set_ext_key(ext), key, set->klen);
if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
memcpy(nft_set_ext_data(ext), data, set->dlen);
if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION))
*nft_set_ext_expiration(ext) =
jiffies + timeout;
if (nft_set_ext_exists(ext, NFT_SET_EXT_TIMEOUT))
*nft_set_ext_timeout(ext) = timeout;
return elem;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 161 | 100.00% | 3 | 100.00% |
| Total | 161 | 100.00% | 3 | 100.00% |
void nft_set_elem_destroy(const struct nft_set *set, void *elem,
bool destroy_expr)
{
struct nft_set_ext *ext = nft_set_elem_ext(set, elem);
nft_data_release(nft_set_ext_key(ext), NFT_DATA_VALUE);
if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
nft_data_release(nft_set_ext_data(ext), set->dtype);
if (destroy_expr && nft_set_ext_exists(ext, NFT_SET_EXT_EXPR))
nf_tables_expr_destroy(NULL, nft_set_ext_expr(ext));
if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF))
(*nft_set_ext_obj(ext))->use--;
kfree(elem);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 80 | 74.77% | 2 | 40.00% |
| Pablo Neira Ayuso | 22 | 20.56% | 2 | 40.00% |
| Liping Zhang | 5 | 4.67% | 1 | 20.00% |
| Total | 107 | 100.00% | 5 | 100.00% |
EXPORT_SYMBOL_GPL(nft_set_elem_destroy);
/* Only called from commit path, nft_set_elem_deactivate() already deals with
* the refcounting from the preparation phase.
*/
static void nf_tables_set_elem_destroy(const struct nft_set *set, void *elem)
{
struct nft_set_ext *ext = nft_set_elem_ext(set, elem);
if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPR))
nf_tables_expr_destroy(NULL, nft_set_ext_expr(ext));
kfree(elem);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 52 | 100.00% | 1 | 100.00% |
| Total | 52 | 100.00% | 1 | 100.00% |
static int nft_setelem_parse_flags(const struct nft_set *set,
const struct nlattr *attr, u32 *flags)
{
if (attr == NULL)
return 0;
*flags = ntohl(nla_get_be32(attr));
if (*flags & ~NFT_SET_ELEM_INTERVAL_END)
return -EINVAL;
if (!(set->flags & NFT_SET_INTERVAL) &&
*flags & NFT_SET_ELEM_INTERVAL_END)
return -EINVAL;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 77 | 100.00% | 1 | 100.00% |
| Total | 77 | 100.00% | 1 | 100.00% |
static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
const struct nlattr *attr, u32 nlmsg_flags)
{
struct nlattr *nla[NFTA_SET_ELEM_MAX + 1];
u8 genmask = nft_genmask_next(ctx->net);
struct nft_data_desc d1, d2;
struct nft_set_ext_tmpl tmpl;
struct nft_set_ext *ext, *ext2;
struct nft_set_elem elem;
struct nft_set_binding *binding;
struct nft_object *obj = NULL;
struct nft_userdata *udata;
struct nft_data data;
enum nft_registers dreg;
struct nft_trans *trans;
u32 flags = 0;
u64 timeout;
u8 ulen;
int err;
err = nla_parse_nested(nla, NFTA_SET_ELEM_MAX, attr,
nft_set_elem_policy, NULL);
if (err < 0)
return err;
if (nla[NFTA_SET_ELEM_KEY] == NULL)
return -EINVAL;
nft_set_ext_prepare(&tmpl);
err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags);
if (err < 0)
return err;
if (flags != 0)
nft_set_ext_add(&tmpl, NFT_SET_EXT_FLAGS);
if (set->flags & NFT_SET_MAP) {
if (nla[NFTA_SET_ELEM_DATA] == NULL &&
!(flags & NFT_SET_ELEM_INTERVAL_END))
return -EINVAL;
if (nla[NFTA_SET_ELEM_DATA] != NULL &&
flags & NFT_SET_ELEM_INTERVAL_END)
return -EINVAL;
} else {
if (nla[NFTA_SET_ELEM_DATA] != NULL)
return -EINVAL;
}
timeout = 0;
if (nla[NFTA_SET_ELEM_TIMEOUT] != NULL) {
if (!(set->flags & NFT_SET_TIMEOUT))
return -EINVAL;
timeout = msecs_to_jiffies(be64_to_cpu(nla_get_be64(
nla[NFTA_SET_ELEM_TIMEOUT])));
} else if (set->flags & NFT_SET_TIMEOUT) {
timeout = set->timeout;
}
err = nft_data_init(ctx, &elem.key.val, sizeof(elem.key), &d1,
nla[NFTA_SET_ELEM_KEY]);
if (err < 0)
goto err1;
err = -EINVAL;
if (d1.type != NFT_DATA_VALUE || d1.len != set->klen)
goto err2;
nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY, d1.len);
if (timeout > 0) {
nft_set_ext_add(&tmpl, NFT_SET_EXT_EXPIRATION);
if (timeout != set->timeout)
nft_set_ext_add(&tmpl, NFT_SET_EXT_TIMEOUT);
}
if (nla[NFTA_SET_ELEM_OBJREF] != NULL) {
if (!(set->flags & NFT_SET_OBJECT)) {
err = -EINVAL;
goto err2;
}
obj = nf_tables_obj_lookup(ctx->table, nla[NFTA_SET_ELEM_OBJREF],
set->objtype, genmask);
if (IS_ERR(obj)) {
err = PTR_ERR(obj);
goto err2;
}
nft_set_ext_add(&tmpl, NFT_SET_EXT_OBJREF);
}
if (nla[NFTA_SET_ELEM_DATA] != NULL) {
err = nft_data_init(ctx, &data, sizeof(data), &d2,
nla[NFTA_SET_ELEM_DATA]);
if (err < 0)
goto err2;
err = -EINVAL;
if (set->dtype != NFT_DATA_VERDICT && d2.len != set->dlen)
goto err3;
dreg = nft_type_to_reg(set->dtype);
list_for_each_entry(binding, &set->bindings, list) {
struct nft_ctx bind_ctx = {
.net = ctx->net,
.afi = ctx->afi,
.table = ctx->table,
.chain = (struct nft_chain *)binding->chain,
};
if (!(binding->flags & NFT_SET_MAP))
continue;
err = nft_validate_register_store(&bind_ctx, dreg,
&data,
d2.type, d2.len);
if (err < 0)
goto err3;
}
nft_set_ext_add_length(&tmpl, NFT_SET_EXT_DATA, d2.len);
}
/* The full maximum length of userdata can exceed the maximum
* offset value (U8_MAX) for following extensions, therefor it
* must be the last extension added.
*/
ulen = 0;
if (nla[NFTA_SET_ELEM_USERDATA] != NULL) {
ulen = nla_len(nla[NFTA_SET_ELEM_USERDATA]);
if (ulen > 0)
nft_set_ext_add_length(&tmpl, NFT_SET_EXT_USERDATA,
ulen);
}
err = -ENOMEM;
elem.priv = nft_set_elem_init(set, &tmpl, elem.key.val.data, data.data,
timeout, GFP_KERNEL);
if (elem.priv == NULL)
goto err3;
ext = nft_set_elem_ext(set, elem.priv);
if (flags)
*nft_set_ext_flags(ext) = flags;
if (ulen > 0) {
udata = nft_set_ext_userdata(ext);
udata->len = ulen - 1;
nla_memcpy(&udata->data, nla[NFTA_SET_ELEM_USERDATA], ulen);
}
if (obj) {
*nft_set_ext_obj(ext) = obj;
obj->use++;
}
trans = nft_trans_elem_alloc(ctx, NFT_MSG_NEWSETELEM, set);
if (trans == NULL)
goto err4;
ext->genmask = nft_genmask_cur(ctx->net) | NFT_SET_ELEM_BUSY_MASK;
err = set->ops->insert(ctx->net, set, &elem, &ext2);
if (err) {
if (err == -EEXIST) {
if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) ^
nft_set_ext_exists(ext2, NFT_SET_EXT_DATA) ||
nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF) ^
nft_set_ext_exists(ext2, NFT_SET_EXT_OBJREF))
return -EBUSY;
if ((nft_set_ext_exists(ext, NFT_SET_EXT_DATA) &&
nft_set_ext_exists(ext2, NFT_SET_EXT_DATA) &&
memcmp(nft_set_ext_data(ext),
nft_set_ext_data(ext2), set->dlen) != 0) ||
(nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF) &&
nft_set_ext_exists(ext2, NFT_SET_EXT_OBJREF) &&
*nft_set_ext_obj(ext) != *nft_set_ext_obj(ext2)))
err = -EBUSY;
else if (!(nlmsg_flags & NLM_F_EXCL))
err = 0;
}
goto err5;
}
if (set->size &&
!atomic_add_unless(&set->nelems, 1, set->size + set->ndeact)) {
err = -ENFILE;
goto err6;
}
nft_trans_elem(trans) = elem;
list_add_tail(&trans->list, &ctx->net->nft.commit_list);
return 0;
err6:
set->ops->remove(ctx->net, set, &elem);
err5:
kfree(trans);
err4:
kfree(elem.priv);
err3:
if (nla[NFTA_SET_ELEM_DATA] != NULL)
nft_data_release(&data, d2.type);
err2:
nft_data_release(&elem.key.val, d1.type);
err1:
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 769 | 65.39% | 14 | 46.67% |
| Pablo Neira Ayuso | 390 | 33.16% | 12 | 40.00% |
| Liping Zhang | 7 | 0.60% | 1 | 3.33% |
| Arturo Borrero Gonzalez | 5 | 0.43% | 1 | 3.33% |
| Anders K. Pedersen | 3 | 0.26% | 1 | 3.33% |
| Johannes Berg | 2 | 0.17% | 1 | 3.33% |
| Total | 1176 | 100.00% | 30 | 100.00% |
static int nf_tables_newsetelem(struct net *net, struct sock *nlsk,
struct sk_buff *skb, const struct nlmsghdr *nlh,
const struct nlattr * const nla[],
struct netlink_ext_ack *extack)
{
u8 genmask = nft_genmask_next(net);
const struct nlattr *attr;
struct nft_set *set;
struct nft_ctx ctx;
int rem, err = 0;
if (nla[NFTA_SET_ELEM_LIST_ELEMENTS] == NULL)
return -EINVAL;
err = nft_ctx_init_from_elemattr(&ctx, net, skb, nlh, nla, genmask);
if (err < 0)
return err;
set = nf_tables_set_lookup(ctx.table, nla[NFTA_SET_ELEM_LIST_SET],
genmask);
if (IS_ERR(set)) {
if (nla[NFTA_SET_ELEM_LIST_SET_ID]) {
set = nf_tables_set_lookup_byid(net,
nla[NFTA_SET_ELEM_LIST_SET_ID],
genmask);
}
if (IS_ERR(set))
return PTR_ERR(set);
}
if (!list_empty(&set->bindings) && set->flags & NFT_SET_CONSTANT)
return -EBUSY;
nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) {
err = nft_add_set_elem(&ctx, set, attr, nlh->nlmsg_flags);
if (err < 0)
break;
}
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 153 | 67.11% | 2 | 20.00% |
| Pablo Neira Ayuso | 75 | 32.89% | 8 | 80.00% |
| Total | 228 | 100.00% | 10 | 100.00% |
/**
* nft_data_hold - hold a nft_data item
*
* @data: struct nft_data to release
* @type: type of data
*
* Hold a nft_data item. NFT_DATA_VALUE types can be silently discarded,
* NFT_DATA_VERDICT bumps the reference to chains in case of NFT_JUMP and
* NFT_GOTO verdicts. This function must be called on active data objects
* from the second phase of the commit protocol.
*/
static void nft_data_hold(const struct nft_data *data, enum nft_data_types type)
{
if (type == NFT_DATA_VERDICT) {
switch (data->verdict.code) {
case NFT_JUMP:
case NFT_GOTO:
data->verdict.chain->use++;
break;
}
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 50 | 100.00% | 1 | 100.00% |
| Total | 50 | 100.00% | 1 | 100.00% |
static void nft_set_elem_activate(const struct net *net,
const struct nft_set *set,
struct nft_set_elem *elem)
{
const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
nft_data_hold(nft_set_ext_data(ext), set->dtype);
if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF))
(*nft_set_ext_obj(ext))->use++;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 79 | 100.00% | 1 | 100.00% |
| Total | 79 | 100.00% | 1 | 100.00% |
static void nft_set_elem_deactivate(const struct net *net,
const struct nft_set *set,
struct nft_set_elem *elem)
{
const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
nft_data_release(nft_set_ext_data(ext), set->dtype);
if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF))
(*nft_set_ext_obj(ext))->use--;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 79 | 100.00% | 1 | 100.00% |
| Total | 79 | 100.00% | 1 | 100.00% |
static int nft_del_setelem(struct nft_ctx *ctx, struct nft_set *set,
const struct nlattr *attr)
{
struct nlattr *nla[NFTA_SET_ELEM_MAX + 1];
struct nft_set_ext_tmpl tmpl;
struct nft_data_desc desc;
struct nft_set_elem elem;
struct nft_set_ext *ext;
struct nft_trans *trans;
u32 flags = 0;
void *priv;
int err;
err = nla_parse_nested(nla, NFTA_SET_ELEM_MAX, attr,
nft_set_elem_policy, NULL);
if (err < 0)
goto err1;
err = -EINVAL;
if (nla[NFTA_SET_ELEM_KEY] == NULL)
goto err1;
nft_set_ext_prepare(&tmpl);
err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags);
if (err < 0)
return err;
if (flags != 0)
nft_set_ext_add(&tmpl, NFT_SET_EXT_FLAGS);
err = nft_data_init(ctx, &elem.key.val, sizeof(elem.key), &desc,
nla[NFTA_SET_ELEM_KEY]);
if (err < 0)
goto err1;
err = -EINVAL;
if (desc.type != NFT_DATA_VALUE || desc.len != set->klen)
goto err2;
nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY, desc.len);
err = -ENOMEM;
elem.priv = nft_set_elem_init(set, &tmpl, elem.key.val.data, NULL, 0,
GFP_KERNEL);
if (elem.priv == NULL)
goto err2;
ext = nft_set_elem_ext(set, elem.priv);
if (flags)
*nft_set_ext_flags(ext) = flags;
trans = nft_trans_elem_alloc(ctx, NFT_MSG_DELSETELEM, set);
if (trans == NULL) {
err = -ENOMEM;
goto err3;
}
priv = set->ops->deactivate(ctx->net, set, &elem);
if (priv == NULL) {
err = -ENOENT;
goto err4;
}
kfree(elem.priv);
elem.priv = priv;
nft_set_elem_deactivate(ctx->net, set, &elem);
nft_trans_elem(trans) = elem;
list_add_tail(&trans->list, &ctx->net->nft.commit_list);
return 0;
err4:
kfree(trans);
err3:
kfree(elem.priv);
err2:
nft_data_release(&elem.key.val, desc.type);
err1:
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 214 | 48.64% | 5 | 35.71% |
| Pablo Neira Ayuso | 210 | 47.73% | 5 | 35.71% |
| Julia Lawall | 6 | 1.36% | 1 | 7.14% |
| Arturo Borrero Gonzalez | 5 | 1.14% | 1 | 7.14% |
| Thomas Graf | 3 | 0.68% | 1 | 7.14% |
| Johannes Berg | 2 | 0.45% | 1 | 7.14% |
| Total | 440 | 100.00% | 14 | 100.00% |
static int nft_flush_set(const struct nft_ctx *ctx,
struct nft_set *set,
const struct nft_set_iter *iter,
struct nft_set_elem *elem)
{
struct nft_trans *trans;
int err;
trans = nft_trans_alloc_gfp(ctx, NFT_MSG_DELSETELEM,
sizeof(struct nft_trans_elem), GFP_ATOMIC);
if (!trans)
return -ENOMEM;
if (!set->ops->flush(ctx->net, set, elem->priv)) {
err = -ENOENT;
goto err1;
}
set->ndeact++;
nft_trans_elem_set(trans) = set;
nft_trans_elem(trans) = *elem;
list_add_tail(&trans->list, &ctx->net->nft.commit_list);
return 0;
err1:
kfree(trans);
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 142 | 100.00% | 3 | 100.00% |
| Total | 142 | 100.00% | 3 | 100.00% |
static int nf_tables_delsetelem(struct net *net, struct sock *nlsk,
struct sk_buff *skb, const struct nlmsghdr *nlh,
const struct nlattr * const nla[],
struct netlink_ext_ack *extack)
{
u8 genmask = nft_genmask_next(net);
const struct nlattr *attr;
struct nft_set *set;
struct nft_ctx ctx;
int rem, err = 0;
err = nft_ctx_init_from_elemattr(&ctx, net, skb, nlh, nla, genmask);
if (err < 0)
return err;
set = nf_tables_set_lookup(ctx.table, nla[NFTA_SET_ELEM_LIST_SET],
genmask);
if (IS_ERR(set))
return PTR_ERR(set);
if (!list_empty(&set->bindings) && set->flags & NFT_SET_CONSTANT)
return -EBUSY;
if (nla[NFTA_SET_ELEM_LIST_ELEMENTS] == NULL) {
struct nft_set_iter iter = {
.genmask = genmask,
.fn = nft_flush_set,
};
set->ops->walk(&ctx, set, &iter);
return iter.err;
}
nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) {
err = nft_del_setelem(&ctx, set, attr);
if (err < 0)
break;
set->ndeact++;
}
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 153 | 66.23% | 2 | 20.00% |
| Pablo Neira Ayuso | 78 | 33.77% | 8 | 80.00% |
| Total | 231 | 100.00% | 10 | 100.00% |
void nft_set_gc_batch_release(struct rcu_head *rcu)
{
struct nft_set_gc_batch *gcb;
unsigned int i;
gcb = container_of(rcu, struct nft_set_gc_batch, head.rcu);
for (i = 0; i < gcb->head.cnt; i++)
nft_set_elem_destroy(gcb->head.set, gcb->elems[i], true);
kfree(gcb);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 71 | 97.26% | 1 | 50.00% |
| Liping Zhang | 2 | 2.74% | 1 | 50.00% |
| Total | 73 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL_GPL(nft_set_gc_batch_release);
struct nft_set_gc_batch *nft_set_gc_batch_alloc(const struct nft_set *set,
gfp_t gfp)
{
struct nft_set_gc_batch *gcb;
gcb = kzalloc(sizeof(*gcb), gfp);
if (gcb == NULL)
return gcb;
gcb->head.set = set;
return gcb;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 54 | 100.00% | 1 | 100.00% |
| Total | 54 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL_GPL(nft_set_gc_batch_alloc);
/*
* Stateful objects
*/
/**
* nft_register_obj- register nf_tables stateful object type
* @obj: object type
*
* Registers the object type for use with nf_tables. Returns zero on
* success or a negative errno code otherwise.
*/
int nft_register_obj(struct nft_object_type *obj_type)
{
if (obj_type->type == NFT_OBJECT_UNSPEC)
return -EINVAL;
nfnl_lock(NFNL_SUBSYS_NFTABLES);
list_add_rcu(&obj_type->list, &nf_tables_objects);
nfnl_unlock(NFNL_SUBSYS_NFTABLES);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 44 | 95.65% | 2 | 66.67% |
| Patrick McHardy | 2 | 4.35% | 1 | 33.33% |
| Total | 46 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL_GPL(nft_register_obj);
/**
* nft_unregister_obj - unregister nf_tables object type
* @obj: object type
*
* Unregisters the object type for use with nf_tables.
*/
void nft_unregister_obj(struct nft_object_type *obj_type)
{
nfnl_lock(NFNL_SUBSYS_NFTABLES);
list_del_rcu(&obj_type->list);
nfnl_unlock(NFNL_SUBSYS_NFTABLES);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 28 | 100.00% | 1 | 100.00% |
| Total | 28 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL_GPL(nft_unregister_obj);
struct nft_object *nf_tables_obj_lookup(const struct nft_table *table,
const struct nlattr *nla,
u32 objtype, u8 genmask)
{
struct nft_object *obj;
list_for_each_entry(obj, &table->objects, list) {
if (!nla_strcmp(nla, obj->name) &&
objtype == obj->ops->type->type &&
nft_active_genmask(obj, genmask))
return obj;
}
return ERR_PTR(-ENOENT);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 77 | 97.47% | 1 | 50.00% |
| Pablo M. Bermudo Garay | 2 | 2.53% | 1 | 50.00% |
| Total | 79 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL_GPL(nf_tables_obj_lookup);
static const struct nla_policy nft_obj_policy[NFTA_OBJ_MAX + 1] = {
[NFTA_OBJ_TABLE] = { .type = NLA_STRING,
.len = NFT_TABLE_MAXNAMELEN - 1 },
[NFTA_OBJ_NAME] = { .type = NLA_STRING,
.len = NFT_OBJ_MAXNAMELEN - 1 },
[NFTA_OBJ_TYPE] = { .type = NLA_U32 },
[NFTA_OBJ_DATA] = { .type = NLA_NESTED },
};
static struct nft_object *nft_obj_init(const struct nft_ctx *ctx,
const struct nft_object_type *type,
const struct nlattr *attr)
{
struct nlattr *tb[type->maxattr + 1];
const struct nft_object_ops *ops;
struct nft_object *obj;
int err;
if (attr) {
err = nla_parse_nested(tb, type->maxattr, attr, type->policy,
NULL);
if (err < 0)
goto err1;
} else {
memset(tb, 0, sizeof(tb[0]) * (type->maxattr + 1));
}
if (type->select_ops) {
ops = type->select_ops(ctx, (const struct nlattr * const *)tb);
if (IS_ERR(ops)) {
err = PTR_ERR(ops);
goto err1;
}
} else {
ops = type->ops;
}
err = -ENOMEM;
obj = kzalloc(sizeof(*obj) + ops->size, GFP_KERNEL);
if (obj == NULL)
goto err1;
err = ops->init(ctx, (const struct nlattr * const *)tb, obj);
if (err < 0)
goto err2;
obj->ops = ops;
return obj;
err2:
kfree(obj);
err1:
return ERR_PTR(err);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 175 | 69.44% | 1 | 25.00% |
| Pablo M. Bermudo Garay | 67 | 26.59% | 1 | 25.00% |
| Florian Westphal | 8 | 3.17% | 1 | 25.00% |
| Johannes Berg | 2 | 0.79% | 1 | 25.00% |
| Total | 252 | 100.00% | 4 | 100.00% |
static int nft_object_dump(struct sk_buff *skb, unsigned int attr,
struct nft_object *obj, bool reset)
{
struct nlattr *nest;
nest = nla_nest_start(skb, attr);
if (!nest)
goto nla_put_failure;
if (obj->ops->dump(skb, obj, reset) < 0)
goto nla_put_failure;
nla_nest_end(skb, nest);
return 0;
nla_put_failure:
return -1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 80 | 98.77% | 2 | 66.67% |
| Pablo M. Bermudo Garay | 1 | 1.23% | 1 | 33.33% |
| Total | 81 | 100.00% | 3 | 100.00% |
static const struct nft_object_type *__nft_obj_type_get(u32 objtype)
{
const struct nft_object_type *type;
list_for_each_entry(type, &nf_tables_objects, list) {
if (objtype == type->type)
return type;
}
return NULL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 42 | 100.00% | 1 | 100.00% |
| Total | 42 | 100.00% | 1 | 100.00% |
static const struct nft_object_type *nft_obj_type_get(u32 objtype)
{
const struct nft_object_type *type;
type = __nft_obj_type_get(objtype);
if (type != NULL && try_module_get(type->owner))
return type;
#ifdef CONFIG_MODULES
if (type == NULL) {
nfnl_unlock(NFNL_SUBSYS_NFTABLES);
request_module("nft-obj-%u", objtype);
nfnl_lock(NFNL_SUBSYS_NFTABLES);
if (__nft_obj_type_get(objtype))
return ERR_PTR(-EAGAIN);
}
#endif
return ERR_PTR(-ENOENT);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 92 | 100.00% | 1 | 100.00% |
| Total | 92 | 100.00% | 1 | 100.00% |
static int nf_tables_newobj(struct net *net, struct sock *nlsk,
struct sk_buff *skb, const struct nlmsghdr *nlh,
const struct nlattr * const nla[],
struct netlink_ext_ack *extack)
{
const struct nfgenmsg *nfmsg = nlmsg_data(nlh);
const struct nft_object_type *type;
u8 genmask = nft_genmask_next(net);
int family = nfmsg->nfgen_family;
struct nft_af_info *afi;
struct nft_table *table;
struct nft_object *obj;
struct nft_ctx ctx;
u32 objtype;
int err;
if (!nla[NFTA_OBJ_TYPE] ||
!nla[NFTA_OBJ_NAME] ||
!nla[NFTA_OBJ_DATA])
return -EINVAL;
afi = nf_tables_afinfo_lookup(net, family, true);
if (IS_ERR(afi))
return PTR_ERR(afi);
table = nf_tables_table_lookup(afi, nla[NFTA_OBJ_TABLE], genmask);
if (IS_ERR(table))
return PTR_ERR(table);
objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
obj = nf_tables_obj_lookup(table, nla[NFTA_OBJ_NAME], objtype, genmask);
if (IS_ERR(obj)) {
err = PTR_ERR(obj);
if (err != -ENOENT)
return err;
} else {
if (nlh->nlmsg_flags & NLM_F_EXCL)
return -EEXIST;
return 0;
}
nft_ctx_init(&ctx, net, skb, nlh, afi, table, NULL, nla);
type = nft_obj_type_get(objtype);
if (IS_ERR(type))
return PTR_ERR(type);
obj = nft_obj_init(&ctx, type, nla[NFTA_OBJ_DATA]);
if (IS_ERR(obj)) {
err = PTR_ERR(obj);
goto err1;
}
obj->table = table;
obj->name = nla_strdup(nla[NFTA_OBJ_NAME], GFP_KERNEL);
if (!obj->name) {
err = -ENOMEM;
goto err2;
}
err = nft_trans_obj_add(&ctx, NFT_MSG_NEWOBJ, obj);
if (err < 0)
goto err3;
list_add_tail_rcu(&obj->list, &table->objects);
table->use++;
return 0;
err3:
kfree(obj->name);
err2:
if (obj->ops->destroy)
obj->ops->destroy(obj);
kfree(obj);
err1:
module_put(type->owner);
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 406 | 91.65% | 3 | 42.86% |
| Phil Sutter | 31 | 7.00% | 1 | 14.29% |
| Florian Westphal | 3 | 0.68% | 1 | 14.29% |
| Pablo M. Bermudo Garay | 2 | 0.45% | 1 | 14.29% |
| Gao Feng | 1 | 0.23% | 1 | 14.29% |
| Total | 443 | 100.00% | 7 | 100.00% |
static int nf_tables_fill_obj_info(struct sk_buff *skb, struct net *net,
u32 portid, u32 seq, int event, u32 flags,
int family, const struct nft_table *table,
struct nft_object *obj, bool reset)
{
struct nfgenmsg *nfmsg;
struct nlmsghdr *nlh;
event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct nfgenmsg), flags);
if (nlh == NULL)
goto nla_put_failure;
nfmsg = nlmsg_data(nlh);
nfmsg->nfgen_family = family;
nfmsg->version = NFNETLINK_V0;
nfmsg->res_id = htons(net->nft.base_seq & 0xffff);
if (nla_put_string(skb, NFTA_OBJ_TABLE, table->name) ||
nla_put_string(skb, NFTA_OBJ_NAME, obj->name) ||
nla_put_be32(skb, NFTA_OBJ_TYPE, htonl(obj->ops->type->type)) ||
nla_put_be32(skb, NFTA_OBJ_USE, htonl(obj->use)) ||
nft_object_dump(skb, NFTA_OBJ_DATA, obj, reset))
goto nla_put_failure;
nlmsg_end(skb, nlh);
return 0;
nla_put_failure:
nlmsg_trim(skb, nlh);
return -1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 219 | 99.10% | 3 | 75.00% |
| Pablo M. Bermudo Garay | 2 | 0.90% | 1 | 25.00% |
| Total | 221 | 100.00% | 4 | 100.00% |
struct nft_obj_filter {
char *table;
u32 type;
};
static int nf_tables_dump_obj(struct sk_buff *skb, struct netlink_callback *cb)
{
const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
const struct nft_af_info *afi;
const struct nft_table *table;
unsigned int idx = 0, s_idx = cb->args[0];
struct nft_obj_filter *filter = cb->data;
struct net *net = sock_net(skb->sk);
int family = nfmsg->nfgen_family;
struct nft_object *obj;
bool reset = false;
if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == NFT_MSG_GETOBJ_RESET)
reset = true;
rcu_read_lock();
cb->seq = net->nft.base_seq;
list_for_each_entry_rcu(afi, &net->nft.af_info, list) {
if (family != NFPROTO_UNSPEC && family != afi->family)
continue;
list_for_each_entry_rcu(table, &afi->tables, list) {
list_for_each_entry_rcu(obj, &table->objects, list) {
if (!nft_is_active(net, obj))
goto cont;
if (idx < s_idx)
goto cont;
if (idx > s_idx)
memset(&cb->args[1], 0,
sizeof(cb->args) - sizeof(cb->args[0]));
if (filter && filter->table[0] &&
strcmp(filter->table, table->name))
goto cont;
if (filter &&
filter->type != NFT_OBJECT_UNSPEC &&
obj->ops->type->type != filter->type)
goto cont;
if (nf_tables_fill_obj_info(skb, net, NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq,
NFT_MSG_NEWOBJ,
NLM_F_MULTI | NLM_F_APPEND,
afi->family, table, obj, reset) < 0)
goto done;
nl_dump_check_consistent(cb, nlmsg_hdr(skb));
cont:
idx++;
}
}
}
done:
rcu_read_unlock();
cb->args[0] = idx;
return skb->len;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 348 | 98.31% | 3 | 60.00% |
| Liping Zhang | 4 | 1.13% | 1 | 20.00% |
| Pablo M. Bermudo Garay | 2 | 0.56% | 1 | 20.00% |
| Total | 354 | 100.00% | 5 | 100.00% |
static int nf_tables_dump_obj_done(struct netlink_callback *cb)
{
struct nft_obj_filter *filter = cb->data;
kfree(filter->table);
kfree(filter);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 19 | 54.29% | 1 | 50.00% |
| Phil Sutter | 16 | 45.71% | 1 | 50.00% |
| Total | 35 | 100.00% | 2 | 100.00% |
static struct nft_obj_filter *
nft_obj_filter_alloc(const struct nlattr * const nla[])
{
struct nft_obj_filter *filter;
filter = kzalloc(sizeof(*filter), GFP_KERNEL);
if (!filter)
return ERR_PTR(-ENOMEM);
if (nla[NFTA_OBJ_TABLE]) {
filter->table = nla_strdup(nla[NFTA_OBJ_TABLE], GFP_KERNEL);
if (!filter->table) {
kfree(filter);
return ERR_PTR(-ENOMEM);
}
}
if (nla[NFTA_OBJ_TYPE])
filter->type = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
return filter;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 88 | 76.52% | 1 | 50.00% |
| Phil Sutter | 27 | 23.48% | 1 | 50.00% |
| Total | 115 | 100.00% | 2 | 100.00% |
static int nf_tables_getobj(struct net *net, struct sock *nlsk,
struct sk_buff *skb, const struct nlmsghdr *nlh,
const struct nlattr * const nla[],
struct netlink_ext_ack *extack)
{
const struct nfgenmsg *nfmsg = nlmsg_data(nlh);
u8 genmask = nft_genmask_cur(net);
int family = nfmsg->nfgen_family;
const struct nft_af_info *afi;
const struct nft_table *table;
struct nft_object *obj;
struct sk_buff *skb2;
bool reset = false;
u32 objtype;
int err;
if (nlh->nlmsg_flags & NLM_F_DUMP) {
struct netlink_dump_control c = {
.dump = nf_tables_dump_obj,
.done = nf_tables_dump_obj_done,
};
if (nla[NFTA_OBJ_TABLE] ||
nla[NFTA_OBJ_TYPE]) {
struct nft_obj_filter *filter;
filter = nft_obj_filter_alloc(nla);
if (IS_ERR(filter))
return -ENOMEM;
c.data = filter;
}
return netlink_dump_start(nlsk, skb, nlh, &c);
}
if (!nla[NFTA_OBJ_NAME] ||
!nla[NFTA_OBJ_TYPE])
return -EINVAL;
afi = nf_tables_afinfo_lookup(net, family, false);
if (IS_ERR(afi))
return PTR_ERR(afi);
table = nf_tables_table_lookup(afi, nla[NFTA_OBJ_TABLE], genmask);
if (IS_ERR(table))
return PTR_ERR(table);
objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
obj = nf_tables_obj_lookup(table, nla[NFTA_OBJ_NAME], objtype, genmask);
if (IS_ERR(obj))
return PTR_ERR(obj);
skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
if (!skb2)
return -ENOMEM;
if (NFNL_MSG_TYPE(nlh->nlmsg_type) == NFT_MSG_GETOBJ_RESET)
reset = true;
err = nf_tables_fill_obj_info(skb2, net, NETLINK_CB(skb).portid,
nlh->nlmsg_seq, NFT_MSG_NEWOBJ, 0,
family, table, obj, reset);
if (err < 0)
goto err;
return nlmsg_unicast(nlsk, skb2, NETLINK_CB(skb).portid);
err:
kfree_skb(skb2);
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 391 | 100.00% | 4 | 100.00% |
| Total | 391 | 100.00% | 4 | 100.00% |
static void nft_obj_destroy(struct nft_object *obj)
{
if (obj->ops->destroy)
obj->ops->destroy(obj);
module_put(obj->ops->type->owner);
kfree(obj->name);
kfree(obj);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 40 | 78.43% | 1 | 33.33% |
| Phil Sutter | 7 | 13.73% | 1 | 33.33% |
| Pablo M. Bermudo Garay | 4 | 7.84% | 1 | 33.33% |
| Total | 51 | 100.00% | 3 | 100.00% |
static int nf_tables_delobj(struct net *net, struct sock *nlsk,
struct sk_buff *skb, const struct nlmsghdr *nlh,
const struct nlattr * const nla[],
struct netlink_ext_ack *extack)
{
const struct nfgenmsg *nfmsg = nlmsg_data(nlh);
u8 genmask = nft_genmask_next(net);
int family = nfmsg->nfgen_family;
struct nft_af_info *afi;
struct nft_table *table;
struct nft_object *obj;
struct nft_ctx ctx;
u32 objtype;
if (!nla[NFTA_OBJ_TYPE] ||
!nla[NFTA_OBJ_NAME])
return -EINVAL;
afi = nf_tables_afinfo_lookup(net, family, true);
if (IS_ERR(afi))
return PTR_ERR(afi);
table = nf_tables_table_lookup(afi, nla[NFTA_OBJ_TABLE], genmask);
if (IS_ERR(table))
return PTR_ERR(table);
objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
obj = nf_tables_obj_lookup(table, nla[NFTA_OBJ_NAME], objtype, genmask);
if (IS_ERR(obj))
return PTR_ERR(obj);
if (obj->use > 0)
return -EBUSY;
nft_ctx_init(&ctx, net, skb, nlh, afi, table, NULL, nla);
return nft_delobj(&ctx, obj);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 240 | 100.00% | 2 | 100.00% |
| Total | 240 | 100.00% | 2 | 100.00% |
void nft_obj_notify(struct net *net, struct nft_table *table,
struct nft_object *obj, u32 portid, u32 seq, int event,
int family, int report, gfp_t gfp)
{
struct sk_buff *skb;
int err;
if (!report &&
!nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
return;
skb = nlmsg_new(NLMSG_GOODSIZE, gfp);
if (skb == NULL)
goto err;
err = nf_tables_fill_obj_info(skb, net, portid, seq, event, 0, family,
table, obj, false);
if (err < 0) {
kfree_skb(skb);
goto err;
}
nfnetlink_send(skb, net, portid, NFNLGRP_NFTABLES, report, gfp);
return;
err:
nfnetlink_set_err(net, portid, NFNLGRP_NFTABLES, -ENOBUFS);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 149 | 100.00% | 4 | 100.00% |
| Total | 149 | 100.00% | 4 | 100.00% |
EXPORT_SYMBOL_GPL(nft_obj_notify);
static void nf_tables_obj_notify(const struct nft_ctx *ctx,
struct nft_object *obj, int event)
{
nft_obj_notify(ctx->net, ctx->table, obj, ctx->portid, ctx->seq, event,
ctx->afi->family, ctx->report, GFP_KERNEL);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 55 | 100.00% | 2 | 100.00% |
| Total | 55 | 100.00% | 2 | 100.00% |
static int nf_tables_fill_gen_info(struct sk_buff *skb, struct net *net,
u32 portid, u32 seq)
{
struct nlmsghdr *nlh;
struct nfgenmsg *nfmsg;
char buf[TASK_COMM_LEN];
int event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, NFT_MSG_NEWGEN);
nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct nfgenmsg), 0);
if (nlh == NULL)
goto nla_put_failure;
nfmsg = nlmsg_data(nlh);
nfmsg->nfgen_family = AF_UNSPEC;
nfmsg->version = NFNETLINK_V0;
nfmsg->res_id = htons(net->nft.base_seq & 0xffff);
if (nla_put_be32(skb, NFTA_GEN_ID, htonl(net->nft.base_seq)) ||
nla_put_be32(skb, NFTA_GEN_PROC_PID, htonl(task_pid_nr(current))) ||
nla_put_string(skb, NFTA_GEN_PROC_NAME, get_task_comm(buf, current)))
goto nla_put_failure;
nlmsg_end(skb, nlh);
return 0;
nla_put_failure:
nlmsg_trim(skb, nlh);
return -EMSGSIZE;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 141 | 76.22% | 3 | 50.00% |
| Phil Sutter | 35 | 18.92% | 1 | 16.67% |
| Patrick McHardy | 6 | 3.24% | 1 | 16.67% |
| Johannes Berg | 3 | 1.62% | 1 | 16.67% |
| Total | 185 | 100.00% | 6 | 100.00% |
static void nf_tables_gen_notify(struct net *net, struct sk_buff *skb,
int event)
{
struct nlmsghdr *nlh = nlmsg_hdr(skb);
struct sk_buff *skb2;
int err;
if (nlmsg_report(nlh) &&
!nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
return;
skb2 = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
if (skb2 == NULL)
goto err;
err = nf_tables_fill_gen_info(skb2, net, NETLINK_CB(skb).portid,
nlh->nlmsg_seq);
if (err < 0) {
kfree_skb(skb2);
goto err;
}
nfnetlink_send(skb2, net, NETLINK_CB(skb).portid, NFNLGRP_NFTABLES,
nlmsg_report(nlh), GFP_KERNEL);
return;
err:
nfnetlink_set_err(net, NETLINK_CB(skb).portid, NFNLGRP_NFTABLES,
-ENOBUFS);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 150 | 100.00% | 2 | 100.00% |
| Total | 150 | 100.00% | 2 | 100.00% |
static int nf_tables_getgen(struct net *net, struct sock *nlsk,
struct sk_buff *skb, const struct nlmsghdr *nlh,
const struct nlattr * const nla[],
struct netlink_ext_ack *extack)
{
struct sk_buff *skb2;
int err;
skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
if (skb2 == NULL)
return -ENOMEM;
err = nf_tables_fill_gen_info(skb2, net, NETLINK_CB(skb).portid,
nlh->nlmsg_seq);
if (err < 0)
goto err;
return nlmsg_unicast(nlsk, skb2, NETLINK_CB(skb).portid);
err:
kfree_skb(skb2);
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 121 | 100.00% | 3 | 100.00% |
| Total | 121 | 100.00% | 3 | 100.00% |
static const struct nfnl_callback nf_tables_cb[NFT_MSG_MAX] = {
[NFT_MSG_NEWTABLE] = {
.call_batch = nf_tables_newtable,
.attr_count = NFTA_TABLE_MAX,
.policy = nft_table_policy,
},
[NFT_MSG_GETTABLE] = {
.call = nf_tables_gettable,
.attr_count = NFTA_TABLE_MAX,
.policy = nft_table_policy,
},
[NFT_MSG_DELTABLE] = {
.call_batch = nf_tables_deltable,
.attr_count = NFTA_TABLE_MAX,
.policy = nft_table_policy,
},
[NFT_MSG_NEWCHAIN] = {
.call_batch = nf_tables_newchain,
.attr_count = NFTA_CHAIN_MAX,
.policy = nft_chain_policy,
},
[NFT_MSG_GETCHAIN] = {
.call = nf_tables_getchain,
.attr_count = NFTA_CHAIN_MAX,
.policy = nft_chain_policy,
},
[NFT_MSG_DELCHAIN] = {
.call_batch = nf_tables_delchain,
.attr_count = NFTA_CHAIN_MAX,
.policy = nft_chain_policy,
},
[NFT_MSG_NEWRULE] = {
.call_batch = nf_tables_newrule,
.attr_count = NFTA_RULE_MAX,
.policy = nft_rule_policy,
},
[NFT_MSG_GETRULE] = {
.call = nf_tables_getrule,
.attr_count = NFTA_RULE_MAX,
.policy = nft_rule_policy,
},
[NFT_MSG_DELRULE] = {
.call_batch = nf_tables_delrule,
.attr_count = NFTA_RULE_MAX,
.policy = nft_rule_policy,
},
[NFT_MSG_NEWSET] = {
.call_batch = nf_tables_newset,
.attr_count = NFTA_SET_MAX,
.policy = nft_set_policy,
},
[NFT_MSG_GETSET] = {
.call = nf_tables_getset,
.attr_count = NFTA_SET_MAX,
.policy = nft_set_policy,
},
[NFT_MSG_DELSET] = {
.call_batch = nf_tables_delset,
.attr_count = NFTA_SET_MAX,
.policy = nft_set_policy,
},
[NFT_MSG_NEWSETELEM] = {
.call_batch = nf_tables_newsetelem,
.attr_count = NFTA_SET_ELEM_LIST_MAX,
.policy = nft_set_elem_list_policy,
},
[NFT_MSG_GETSETELEM] = {
.call = nf_tables_getsetelem,
.attr_count = NFTA_SET_ELEM_LIST_MAX,
.policy = nft_set_elem_list_policy,
},
[NFT_MSG_DELSETELEM] = {
.call_batch = nf_tables_delsetelem,
.attr_count = NFTA_SET_ELEM_LIST_MAX,
.policy = nft_set_elem_list_policy,
},
[NFT_MSG_GETGEN] = {
.call = nf_tables_getgen,
},
[NFT_MSG_NEWOBJ] = {
.call_batch = nf_tables_newobj,
.attr_count = NFTA_OBJ_MAX,
.policy = nft_obj_policy,
},
[NFT_MSG_GETOBJ] = {
.call = nf_tables_getobj,
.attr_count = NFTA_OBJ_MAX,
.policy = nft_obj_policy,
},
[NFT_MSG_DELOBJ] = {
.call_batch = nf_tables_delobj,
.attr_count = NFTA_OBJ_MAX,
.policy = nft_obj_policy,
},
[NFT_MSG_GETOBJ_RESET] = {
.call = nf_tables_getobj,
.attr_count = NFTA_OBJ_MAX,
.policy = nft_obj_policy,
},
};
static void nft_chain_commit_update(struct nft_trans *trans)
{
struct nft_base_chain *basechain;
if (nft_trans_chain_name(trans))
strcpy(trans->ctx.chain->name, nft_trans_chain_name(trans));
if (!nft_is_base_chain(trans->ctx.chain))
return;
basechain = nft_base_chain(trans->ctx.chain);
nft_chain_stats_replace(basechain, nft_trans_chain_stats(trans));
switch (nft_trans_chain_policy(trans)) {
case NF_DROP:
case NF_ACCEPT:
basechain->policy = nft_trans_chain_policy(trans);
break;
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 98 | 100.00% | 2 | 100.00% |
| Total | 98 | 100.00% | 2 | 100.00% |
static void nf_tables_commit_release(struct nft_trans *trans)
{
switch (trans->msg_type) {
case NFT_MSG_DELTABLE:
nf_tables_table_destroy(&trans->ctx);
break;
case NFT_MSG_DELCHAIN:
nf_tables_chain_destroy(trans->ctx.chain);
break;
case NFT_MSG_DELRULE:
nf_tables_rule_destroy(&trans->ctx, nft_trans_rule(trans));
break;
case NFT_MSG_DELSET:
nft_set_destroy(nft_trans_set(trans));
break;
case NFT_MSG_DELSETELEM:
nf_tables_set_elem_destroy(nft_trans_elem_set(trans),
nft_trans_elem(trans).priv);
break;
case NFT_MSG_DELOBJ:
nft_obj_destroy(nft_trans_obj(trans));
break;
}
kfree(trans);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 91 | 83.49% | 4 | 80.00% |
| Patrick McHardy | 18 | 16.51% | 1 | 20.00% |
| Total | 109 | 100.00% | 5 | 100.00% |
static int nf_tables_commit(struct net *net, struct sk_buff *skb)
{
struct nft_trans *trans, *next;
struct nft_trans_elem *te;
/* Bump generation counter, invalidate any dump in progress */
while (++net->nft.base_seq == 0);
/* A new generation has just started */
net->nft.gencursor = nft_gencursor_next(net);
/* Make sure all packets have left the previous generation before
* purging old rules.
*/
synchronize_rcu();
list_for_each_entry_safe(trans, next, &net->nft.commit_list, list) {
switch (trans->msg_type) {
case NFT_MSG_NEWTABLE:
if (nft_trans_table_update(trans)) {
if (!nft_trans_table_enable(trans)) {
nf_tables_table_disable(net,
trans->ctx.afi,
trans->ctx.table);
trans->ctx.table->flags |= NFT_TABLE_F_DORMANT;
}
} else {
nft_clear(net, trans->ctx.table);
}
nf_tables_table_notify(&trans->ctx, NFT_MSG_NEWTABLE);
nft_trans_destroy(trans);
break;
case NFT_MSG_DELTABLE:
list_del_rcu(&trans->ctx.table->list);
nf_tables_table_notify(&trans->ctx, NFT_MSG_DELTABLE);
break;
case NFT_MSG_NEWCHAIN:
if (nft_trans_chain_update(trans))
nft_chain_commit_update(trans);
else
nft_clear(net, trans->ctx.chain);
nf_tables_chain_notify(&trans->ctx, NFT_MSG_NEWCHAIN);
nft_trans_destroy(trans);
break;
case NFT_MSG_DELCHAIN:
list_del_rcu(&trans->ctx.chain->list);
nf_tables_chain_notify(&trans->ctx, NFT_MSG_DELCHAIN);
nf_tables_unregister_hooks(trans->ctx.net,
trans->ctx.table,
trans->ctx.chain,
trans->ctx.afi->nops);
break;
case NFT_MSG_NEWRULE:
nft_clear(trans->ctx.net, nft_trans_rule(trans));
nf_tables_rule_notify(&trans->ctx,
nft_trans_rule(trans),
NFT_MSG_NEWRULE);
nft_trans_destroy(trans);
break;
case NFT_MSG_DELRULE:
list_del_rcu(&nft_trans_rule(trans)->list);
nf_tables_rule_notify(&trans->ctx,
nft_trans_rule(trans),
NFT_MSG_DELRULE);
break;
case NFT_MSG_NEWSET:
nft_clear(net, nft_trans_set(trans));
/* This avoids hitting -EBUSY when deleting the table
* from the transaction.
*/
if (nft_trans_set(trans)->flags & NFT_SET_ANONYMOUS &&
!list_empty(&nft_trans_set(trans)->bindings))
trans->ctx.table->use--;
nf_tables_set_notify(&trans->ctx, nft_trans_set(trans),
NFT_MSG_NEWSET, GFP_KERNEL);
nft_trans_destroy(trans);
break;
case NFT_MSG_DELSET:
list_del_rcu(&nft_trans_set(trans)->list);
nf_tables_set_notify(&trans->ctx, nft_trans_set(trans),
NFT_MSG_DELSET, GFP_KERNEL);
break;
case NFT_MSG_NEWSETELEM:
te = (struct nft_trans_elem *)trans->data;
te->set->ops->activate(net, te->set, &te->elem);
nf_tables_setelem_notify(&trans->ctx, te->set,
&te->elem,
NFT_MSG_NEWSETELEM, 0);
nft_trans_destroy(trans);
break;
case NFT_MSG_DELSETELEM:
te = (struct nft_trans_elem *)trans->data;
nf_tables_setelem_notify(&trans->ctx, te->set,
&te->elem,
NFT_MSG_DELSETELEM, 0);
te->set->ops->remove(net, te->set, &te->elem);
atomic_dec(&te->set->nelems);
te->set->ndeact--;
break;
case NFT_MSG_NEWOBJ:
nft_clear(net, nft_trans_obj(trans));
nf_tables_obj_notify(&trans->ctx, nft_trans_obj(trans),
NFT_MSG_NEWOBJ);
nft_trans_destroy(trans);
break;
case NFT_MSG_DELOBJ:
list_del_rcu(&nft_trans_obj(trans)->list);
nf_tables_obj_notify(&trans->ctx, nft_trans_obj(trans),
NFT_MSG_DELOBJ);
break;
}
}
synchronize_rcu();
list_for_each_entry_safe(trans, next, &net->nft.commit_list, list) {
list_del(&trans->list);
nf_tables_commit_release(trans);
}
nf_tables_gen_notify(net, skb, NFT_MSG_NEWGEN);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 632 | 91.86% | 24 | 85.71% |
| Patrick McHardy | 53 | 7.70% | 3 | 10.71% |
| Arturo Borrero Gonzalez | 3 | 0.44% | 1 | 3.57% |
| Total | 688 | 100.00% | 28 | 100.00% |
static void nf_tables_abort_release(struct nft_trans *trans)
{
switch (trans->msg_type) {
case NFT_MSG_NEWTABLE:
nf_tables_table_destroy(&trans->ctx);
break;
case NFT_MSG_NEWCHAIN:
nf_tables_chain_destroy(trans->ctx.chain);
break;
case NFT_MSG_NEWRULE:
nf_tables_rule_destroy(&trans->ctx, nft_trans_rule(trans));
break;
case NFT_MSG_NEWSET:
nft_set_destroy(nft_trans_set(trans));
break;
case NFT_MSG_NEWSETELEM:
nft_set_elem_destroy(nft_trans_elem_set(trans),
nft_trans_elem(trans).priv, true);
break;
case NFT_MSG_NEWOBJ:
nft_obj_destroy(nft_trans_obj(trans));
break;
}
kfree(trans);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 90 | 81.08% | 8 | 80.00% |
| Patrick McHardy | 19 | 17.12% | 1 | 10.00% |
| Liping Zhang | 2 | 1.80% | 1 | 10.00% |
| Total | 111 | 100.00% | 10 | 100.00% |
static int nf_tables_abort(struct net *net, struct sk_buff *skb)
{
struct nft_trans *trans, *next;
struct nft_trans_elem *te;
list_for_each_entry_safe_reverse(trans, next, &net->nft.commit_list,
list) {
switch (trans->msg_type) {
case NFT_MSG_NEWTABLE:
if (nft_trans_table_update(trans)) {
if (nft_trans_table_enable(trans)) {
nf_tables_table_disable(net,
trans->ctx.afi,
trans->ctx.table);
trans->ctx.table->flags |= NFT_TABLE_F_DORMANT;
}
nft_trans_destroy(trans);
} else {
list_del_rcu(&trans->ctx.table->list);
}
break;
case NFT_MSG_DELTABLE:
nft_clear(trans->ctx.net, trans->ctx.table);
nft_trans_destroy(trans);
break;
case NFT_MSG_NEWCHAIN:
if (nft_trans_chain_update(trans)) {
free_percpu(nft_trans_chain_stats(trans));
nft_trans_destroy(trans);
} else {
trans->ctx.table->use--;
list_del_rcu(&trans->ctx.chain->list);
nf_tables_unregister_hooks(trans->ctx.net,
trans->ctx.table,
trans->ctx.chain,
trans->ctx.afi->nops);
}
break;
case NFT_MSG_DELCHAIN:
trans->ctx.table->use++;
nft_clear(trans->ctx.net, trans->ctx.chain);
nft_trans_destroy(trans);
break;
case NFT_MSG_NEWRULE:
trans->ctx.chain->use--;
list_del_rcu(&nft_trans_rule(trans)->list);
break;
case NFT_MSG_DELRULE:
trans->ctx.chain->use++;
nft_clear(trans->ctx.net, nft_trans_rule(trans));
nft_trans_destroy(trans);
break;
case NFT_MSG_NEWSET:
trans->ctx.table->use--;
list_del_rcu(&nft_trans_set(trans)->list);
break;
case NFT_MSG_DELSET:
trans->ctx.table->use++;
nft_clear(trans->ctx.net, nft_trans_set(trans));
nft_trans_destroy(trans);
break;
case NFT_MSG_NEWSETELEM:
te = (struct nft_trans_elem *)trans->data;
te->set->ops->remove(net, te->set, &te->elem);
atomic_dec(&te->set->nelems);
break;
case NFT_MSG_DELSETELEM:
te = (struct nft_trans_elem *)trans->data;
nft_set_elem_activate(net, te->set, &te->elem);
te->set->ops->activate(net, te->set, &te->elem);
te->set->ndeact--;
nft_trans_destroy(trans);
break;
case NFT_MSG_NEWOBJ:
trans->ctx.table->use--;
list_del_rcu(&nft_trans_obj(trans)->list);
break;
case NFT_MSG_DELOBJ:
trans->ctx.table->use++;
nft_clear(trans->ctx.net, nft_trans_obj(trans));
nft_trans_destroy(trans);
break;
}
}
synchronize_rcu();
list_for_each_entry_safe_reverse(trans, next,
&net->nft.commit_list, list) {
list_del(&trans->list);
nf_tables_abort_release(trans);
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 521 | 93.20% | 22 | 84.62% |
| Patrick McHardy | 34 | 6.08% | 2 | 7.69% |
| Arturo Borrero Gonzalez | 3 | 0.54% | 1 | 3.85% |
| Xin Long | 1 | 0.18% | 1 | 3.85% |
| Total | 559 | 100.00% | 26 | 100.00% |
static bool nf_tables_valid_genid(struct net *net, u32 genid)
{
return net->nft.base_seq == genid;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 23 | 100.00% | 1 | 100.00% |
| Total | 23 | 100.00% | 1 | 100.00% |
static const struct nfnetlink_subsystem nf_tables_subsys = {
.name = "nf_tables",
.subsys_id = NFNL_SUBSYS_NFTABLES,
.cb_count = NFT_MSG_MAX,
.cb = nf_tables_cb,
.commit = nf_tables_commit,
.abort = nf_tables_abort,
.valid_genid = nf_tables_valid_genid,
};
int nft_chain_validate_dependency(const struct nft_chain *chain,
enum nft_chain_type type)
{
const struct nft_base_chain *basechain;
if (nft_is_base_chain(chain)) {
basechain = nft_base_chain(chain);
if (basechain->type->type != type)
return -EOPNOTSUPP;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 54 | 100.00% | 2 | 100.00% |
| Total | 54 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL_GPL(nft_chain_validate_dependency);
int nft_chain_validate_hooks(const struct nft_chain *chain,
unsigned int hook_flags)
{
struct nft_base_chain *basechain;
if (nft_is_base_chain(chain)) {
basechain = nft_base_chain(chain);
if ((1 << basechain->ops[0].hooknum) & hook_flags)
return 0;
return -EOPNOTSUPP;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 63 | 100.00% | 2 | 100.00% |
| Total | 63 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL_GPL(nft_chain_validate_hooks);
/*
* Loop detection - walk through the ruleset beginning at the destination chain
* of a new jump until either the source chain is reached (loop) or all
* reachable chains have been traversed.
*
* The loop check is performed whenever a new jump verdict is added to an
* expression or verdict map or a verdict map is bound to a new chain.
*/
static int nf_tables_check_loops(const struct nft_ctx *ctx,
const struct nft_chain *chain);
static int nf_tables_loop_check_setelem(const struct nft_ctx *ctx,
struct nft_set *set,
const struct nft_set_iter *iter,
struct nft_set_elem *elem)
{
const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
const struct nft_data *data;
if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
*nft_set_ext_flags(ext) & NFT_SET_ELEM_INTERVAL_END)
return 0;
data = nft_set_ext_data(ext);
switch (data->verdict.code) {
case NFT_JUMP:
case NFT_GOTO:
return nf_tables_check_loops(ctx, data->verdict.chain);
default:
return 0;
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 100 | 92.59% | 3 | 75.00% |
| Pablo Neira Ayuso | 8 | 7.41% | 1 | 25.00% |
| Total | 108 | 100.00% | 4 | 100.00% |
static int nf_tables_check_loops(const struct nft_ctx *ctx,
const struct nft_chain *chain)
{
const struct nft_rule *rule;
const struct nft_expr *expr, *last;
struct nft_set *set;
struct nft_set_binding *binding;
struct nft_set_iter iter;
if (ctx->chain == chain)
return -ELOOP;
list_for_each_entry(rule, &chain->rules, list) {
nft_rule_for_each_expr(expr, last, rule) {
const struct nft_data *data = NULL;
int err;
if (!expr->ops->validate)
continue;
err = expr->ops->validate(ctx, expr, &data);
if (err < 0)
return err;
if (data == NULL)
continue;
switch (data->verdict.code) {
case NFT_JUMP:
case NFT_GOTO:
err = nf_tables_check_loops(ctx,
data->verdict.chain);
if (err < 0)
return err;
default:
break;
}
}
}
list_for_each_entry(set, &ctx->table->sets, list) {
if (!nft_is_active_next(ctx->net, set))
continue;
if (!(set->flags & NFT_SET_MAP) ||
set->dtype != NFT_DATA_VERDICT)
continue;
list_for_each_entry(binding, &set->bindings, list) {
if (!(binding->flags & NFT_SET_MAP) ||
binding->chain != chain)
continue;
iter.genmask = nft_genmask_next(ctx->net);
iter.skip = 0;
iter.count = 0;
iter.err = 0;
iter.fn = nf_tables_loop_check_setelem;
set->ops->walk(ctx, set, &iter);
if (iter.err < 0)
return iter.err;
}
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 254 | 83.01% | 4 | 57.14% |
| Pablo Neira Ayuso | 52 | 16.99% | 3 | 42.86% |
| Total | 306 | 100.00% | 7 | 100.00% |
/**
* nft_parse_u32_check - fetch u32 attribute and check for maximum value
*
* @attr: netlink attribute to fetch value from
* @max: maximum value to be stored in dest
* @dest: pointer to the variable
*
* Parse, check and store a given u32 netlink attribute into variable.
* This function returns -ERANGE if the value goes over maximum value.
* Otherwise a 0 is returned and the attribute value is stored in the
* destination variable.
*/
int nft_parse_u32_check(const struct nlattr *attr, int max, u32 *dest)
{
u32 val;
val = ntohl(nla_get_be32(attr));
if (val > max)
return -ERANGE;
*dest = val;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Laura Garcia Liebana | 48 | 97.96% | 1 | 50.00% |
| Dan Carpenter | 1 | 2.04% | 1 | 50.00% |
| Total | 49 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL_GPL(nft_parse_u32_check);
/**
* nft_parse_register - parse a register value from a netlink attribute
*
* @attr: netlink attribute
*
* Parse and translate a register value from a netlink attribute.
* Registers used to be 128 bit wide, these register numbers will be
* mapped to the corresponding 32 bit register numbers.
*/
unsigned int nft_parse_register(const struct nlattr *attr)
{
unsigned int reg;
reg = ntohl(nla_get_be32(attr));
switch (reg) {
case NFT_REG_VERDICT...NFT_REG_4:
return reg * NFT_REG_SIZE / NFT_REG32_SIZE;
default:
return reg + NFT_REG_SIZE / NFT_REG32_SIZE - NFT_REG32_00;
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 54 | 100.00% | 2 | 100.00% |
| Total | 54 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL_GPL(nft_parse_register);
/**
* nft_dump_register - dump a register value to a netlink attribute
*
* @skb: socket buffer
* @attr: attribute number
* @reg: register number
*
* Construct a netlink attribute containing the register number. For
* compatibility reasons, register numbers being a multiple of 4 are
* translated to the corresponding 128 bit register numbers.
*/
int nft_dump_register(struct sk_buff *skb, unsigned int attr, unsigned int reg)
{
if (reg % (NFT_REG_SIZE / NFT_REG32_SIZE) == 0)
reg = reg / (NFT_REG_SIZE / NFT_REG32_SIZE);
else
reg = reg - NFT_REG_SIZE / NFT_REG32_SIZE + NFT_REG32_00;
return nla_put_be32(skb, attr, htonl(reg));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 64 | 100.00% | 2 | 100.00% |
| Total | 64 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL_GPL(nft_dump_register);
/**
* nft_validate_register_load - validate a load from a register
*
* @reg: the register number
* @len: the length of the data
*
* Validate that the input register is one of the general purpose
* registers and that the length of the load is within the bounds.
*/
int nft_validate_register_load(enum nft_registers reg, unsigned int len)
{
if (reg < NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE)
return -EINVAL;
if (len == 0)
return -EINVAL;
if (reg * NFT_REG32_SIZE + len > FIELD_SIZEOF(struct nft_regs, data))
return -ERANGE;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 60 | 100.00% | 3 | 100.00% |
| Total | 60 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL_GPL(nft_validate_register_load);
/**
* nft_validate_register_store - validate an expressions' register store
*
* @ctx: context of the expression performing the load
* @reg: the destination register number
* @data: the data to load
* @type: the data type
* @len: the length of the data
*
* Validate that a data load uses the appropriate data type for
* the destination register and the length is within the bounds.
* A value of NULL for the data means that its runtime gathered
* data.
*/
int nft_validate_register_store(const struct nft_ctx *ctx,
enum nft_registers reg,
const struct nft_data *data,
enum nft_data_types type, unsigned int len)
{
int err;
switch (reg) {
case NFT_REG_VERDICT:
if (type != NFT_DATA_VERDICT)
return -EINVAL;
if (data != NULL &&
(data->verdict.code == NFT_GOTO ||
data->verdict.code == NFT_JUMP)) {
err = nf_tables_check_loops(ctx, data->verdict.chain);
if (err < 0)
return err;
if (ctx->chain->level + 1 >
data->verdict.chain->level) {
if (ctx->chain->level + 1 == NFT_JUMP_STACK_SIZE)
return -EMLINK;
data->verdict.chain->level = ctx->chain->level + 1;
}
}
return 0;
default:
if (reg < NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE)
return -EINVAL;
if (len == 0)
return -EINVAL;
if (reg * NFT_REG32_SIZE + len >
FIELD_SIZEOF(struct nft_regs, data))
return -ERANGE;
if (data != NULL && type != NFT_DATA_VALUE)
return -EINVAL;
return 0;
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 216 | 100.00% | 8 | 100.00% |
| Total | 216 | 100.00% | 8 | 100.00% |
EXPORT_SYMBOL_GPL(nft_validate_register_store);
static const struct nla_policy nft_verdict_policy[NFTA_VERDICT_MAX + 1] = {
[NFTA_VERDICT_CODE] = { .type = NLA_U32 },
[NFTA_VERDICT_CHAIN] = { .type = NLA_STRING,
.len = NFT_CHAIN_MAXNAMELEN - 1 },
};
static int nft_verdict_init(const struct nft_ctx *ctx, struct nft_data *data,
struct nft_data_desc *desc, const struct nlattr *nla)
{
u8 genmask = nft_genmask_next(ctx->net);
struct nlattr *tb[NFTA_VERDICT_MAX + 1];
struct nft_chain *chain;
int err;
err = nla_parse_nested(tb, NFTA_VERDICT_MAX, nla, nft_verdict_policy,
NULL);
if (err < 0)
return err;
if (!tb[NFTA_VERDICT_CODE])
return -EINVAL;
data->verdict.code = ntohl(nla_get_be32(tb[NFTA_VERDICT_CODE]));
switch (data->verdict.code) {
default:
switch (data->verdict.code & NF_VERDICT_MASK) {
case NF_ACCEPT:
case NF_DROP:
case NF_QUEUE:
break;
default:
return -EINVAL;
}
/* fall through */
case NFT_CONTINUE:
case NFT_BREAK:
case NFT_RETURN:
break;
case NFT_JUMP:
case NFT_GOTO:
if (!tb[NFTA_VERDICT_CHAIN])
return -EINVAL;
chain = nf_tables_chain_lookup(ctx->table,
tb[NFTA_VERDICT_CHAIN], genmask);
if (IS_ERR(chain))
return PTR_ERR(chain);
if (nft_is_base_chain(chain))
return -EOPNOTSUPP;
chain->use++;
data->verdict.chain = chain;
break;
}
desc->len = sizeof(data->verdict);
desc->type = NFT_DATA_VERDICT;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 229 | 91.60% | 3 | 42.86% |
| Pablo Neira Ayuso | 15 | 6.00% | 2 | 28.57% |
| Florian Westphal | 4 | 1.60% | 1 | 14.29% |
| Johannes Berg | 2 | 0.80% | 1 | 14.29% |
| Total | 250 | 100.00% | 7 | 100.00% |
static void nft_verdict_uninit(const struct nft_data *data)
{
switch (data->verdict.code) {
case NFT_JUMP:
case NFT_GOTO:
data->verdict.chain->use--;
break;
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 38 | 100.00% | 2 | 100.00% |
| Total | 38 | 100.00% | 2 | 100.00% |
int nft_verdict_dump(struct sk_buff *skb, int type, const struct nft_verdict *v)
{
struct nlattr *nest;
nest = nla_nest_start(skb, type);
if (!nest)
goto nla_put_failure;
if (nla_put_be32(skb, NFTA_VERDICT_CODE, htonl(v->code)))
goto nla_put_failure;
switch (v->code) {
case NFT_JUMP:
case NFT_GOTO:
if (nla_put_string(skb, NFTA_VERDICT_CHAIN,
v->chain->name))
goto nla_put_failure;
}
nla_nest_end(skb, nest);
return 0;
nla_put_failure:
return -1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 99 | 91.67% | 2 | 66.67% |
| Florian Westphal | 9 | 8.33% | 1 | 33.33% |
| Total | 108 | 100.00% | 3 | 100.00% |
static int nft_value_init(const struct nft_ctx *ctx,
struct nft_data *data, unsigned int size,
struct nft_data_desc *desc, const struct nlattr *nla)
{
unsigned int len;
len = nla_len(nla);
if (len == 0)
return -EINVAL;
if (len > size)
return -EOVERFLOW;
nla_memcpy(data->data, nla, len);
desc->type = NFT_DATA_VALUE;
desc->len = len;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 89 | 100.00% | 2 | 100.00% |
| Total | 89 | 100.00% | 2 | 100.00% |
static int nft_value_dump(struct sk_buff *skb, const struct nft_data *data,
unsigned int len)
{
return nla_put(skb, NFTA_DATA_VALUE, len, data->data);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 35 | 100.00% | 1 | 100.00% |
| Total | 35 | 100.00% | 1 | 100.00% |
static const struct nla_policy nft_data_policy[NFTA_DATA_MAX + 1] = {
[NFTA_DATA_VALUE] = { .type = NLA_BINARY },
[NFTA_DATA_VERDICT] = { .type = NLA_NESTED },
};
/**
* nft_data_init - parse nf_tables data netlink attributes
*
* @ctx: context of the expression using the data
* @data: destination struct nft_data
* @size: maximum data length
* @desc: data description
* @nla: netlink attribute containing data
*
* Parse the netlink data attributes and initialize a struct nft_data.
* The type and length of data are returned in the data description.
*
* The caller can indicate that it only wants to accept data of type
* NFT_DATA_VALUE by passing NULL for the ctx argument.
*/
int nft_data_init(const struct nft_ctx *ctx,
struct nft_data *data, unsigned int size,
struct nft_data_desc *desc, const struct nlattr *nla)
{
struct nlattr *tb[NFTA_DATA_MAX + 1];
int err;
err = nla_parse_nested(tb, NFTA_DATA_MAX, nla, nft_data_policy, NULL);
if (err < 0)
return err;
if (tb[NFTA_DATA_VALUE])
return nft_value_init(ctx, data, size, desc,
tb[NFTA_DATA_VALUE]);
if (tb[NFTA_DATA_VERDICT] && ctx != NULL)
return nft_verdict_init(ctx, data, desc, tb[NFTA_DATA_VERDICT]);
return -EINVAL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 120 | 98.36% | 2 | 66.67% |
| Johannes Berg | 2 | 1.64% | 1 | 33.33% |
| Total | 122 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL_GPL(nft_data_init);
/**
* nft_data_release - release a nft_data item
*
* @data: struct nft_data to release
* @type: type of data
*
* Release a nft_data item. NFT_DATA_VALUE types can be silently discarded,
* all others need to be released by calling this function.
*/
void nft_data_release(const struct nft_data *data, enum nft_data_types type)
{
if (type < NFT_DATA_VERDICT)
return;
switch (type) {
case NFT_DATA_VERDICT:
return nft_verdict_uninit(data);
default:
WARN_ON(1);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 35 | 81.40% | 1 | 33.33% |
| Mirek Kratochvil | 7 | 16.28% | 1 | 33.33% |
| Pablo Neira Ayuso | 1 | 2.33% | 1 | 33.33% |
| Total | 43 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL_GPL(nft_data_release);
int nft_data_dump(struct sk_buff *skb, int attr, const struct nft_data *data,
enum nft_data_types type, unsigned int len)
{
struct nlattr *nest;
int err;
nest = nla_nest_start(skb, attr);
if (nest == NULL)
return -1;
switch (type) {
case NFT_DATA_VALUE:
err = nft_value_dump(skb, data, len);
break;
case NFT_DATA_VERDICT:
err = nft_verdict_dump(skb, NFTA_DATA_VERDICT, &data->verdict);
break;
default:
err = -EINVAL;
WARN_ON(1);
}
nla_nest_end(skb, nest);
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 109 | 95.61% | 1 | 50.00% |
| Florian Westphal | 5 | 4.39% | 1 | 50.00% |
| Total | 114 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL_GPL(nft_data_dump);
static int __net_init nf_tables_init_net(struct net *net)
{
INIT_LIST_HEAD(&net->nft.af_info);
INIT_LIST_HEAD(&net->nft.commit_list);
net->nft.base_seq = 1;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 43 | 100.00% | 4 | 100.00% |
| Total | 43 | 100.00% | 4 | 100.00% |
int __nft_release_basechain(struct nft_ctx *ctx)
{
struct nft_rule *rule, *nr;
BUG_ON(!nft_is_base_chain(ctx->chain));
nf_tables_unregister_hooks(ctx->net, ctx->chain->table, ctx->chain,
ctx->afi->nops);
list_for_each_entry_safe(rule, nr, &ctx->chain->rules, list) {
list_del(&rule->list);
ctx->chain->use--;
nf_tables_rule_destroy(ctx, rule);
}
list_del(&ctx->chain->list);
ctx->table->use--;
nf_tables_chain_destroy(ctx->chain);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 113 | 100.00% | 3 | 100.00% |
| Total | 113 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL_GPL(__nft_release_basechain);
/* Called by nft_unregister_afinfo() from __net_exit path, nfnl_lock is held. */
static void __nft_release_afinfo(struct net *net, struct nft_af_info *afi)
{
struct nft_table *table, *nt;
struct nft_chain *chain, *nc;
struct nft_object *obj, *ne;
struct nft_rule *rule, *nr;
struct nft_set *set, *ns;
struct nft_ctx ctx = {
.net = net,
.afi = afi,
};
list_for_each_entry_safe(table, nt, &afi->tables, list) {
list_for_each_entry(chain, &table->chains, list)
nf_tables_unregister_hooks(net, table, chain,
afi->nops);
/* No packets are walking on these chains anymore. */
ctx.table = table;
list_for_each_entry(chain, &table->chains, list) {
ctx.chain = chain;
list_for_each_entry_safe(rule, nr, &chain->rules, list) {
list_del(&rule->list);
chain->use--;
nf_tables_rule_destroy(&ctx, rule);
}
}
list_for_each_entry_safe(set, ns, &table->sets, list) {
list_del(&set->list);
table->use--;
nft_set_destroy(set);
}
list_for_each_entry_safe(obj, ne, &table->objects, list) {
list_del(&obj->list);
table->use--;
nft_obj_destroy(obj);
}
list_for_each_entry_safe(chain, nc, &table->chains, list) {
list_del(&chain->list);
table->use--;
nf_tables_chain_destroy(chain);
}
list_del(&table->list);
nf_tables_table_destroy(&ctx);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 265 | 100.00% | 3 | 100.00% |
| Total | 265 | 100.00% | 3 | 100.00% |
static struct pernet_operations nf_tables_net_ops = {
.init = nf_tables_init_net,
};
static int __init nf_tables_module_init(void)
{
int err;
info = kmalloc(sizeof(struct nft_expr_info) * NFT_RULE_MAXEXPRS,
GFP_KERNEL);
if (info == NULL) {
err = -ENOMEM;
goto err1;
}
err = nf_tables_core_module_init();
if (err < 0)
goto err2;
err = nfnetlink_subsys_register(&nf_tables_subsys);
if (err < 0)
goto err3;
pr_info("nf_tables: (c) 2007-2009 Patrick McHardy <kaber@trash.net>\n");
return register_pernet_subsys(&nf_tables_net_ops);
err3:
nf_tables_core_module_exit();
err2:
kfree(info);
err1:
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 98 | 95.15% | 1 | 50.00% |
| Pablo Neira Ayuso | 5 | 4.85% | 1 | 50.00% |
| Total | 103 | 100.00% | 2 | 100.00% |
static void __exit nf_tables_module_exit(void)
{
unregister_pernet_subsys(&nf_tables_net_ops);
nfnetlink_subsys_unregister(&nf_tables_subsys);
rcu_barrier();
nf_tables_core_module_exit();
kfree(info);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 23 | 71.88% | 1 | 33.33% |
| Pablo Neira Ayuso | 9 | 28.12% | 2 | 66.67% |
| Total | 32 | 100.00% | 3 | 100.00% |
module_init(nf_tables_module_init);
module_exit(nf_tables_module_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_NFTABLES);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 12787 | 42.06% | 108 | 51.92% |
| Patrick McHardy | 12132 | 39.90% | 49 | 23.56% |
| Arturo Borrero Gonzalez | 4160 | 13.68% | 7 | 3.37% |
| Liping Zhang | 321 | 1.06% | 9 | 4.33% |
| Phil Sutter | 298 | 0.98% | 5 | 2.40% |
| Eric Leblond | 170 | 0.56% | 1 | 0.48% |
| Carlos Falgueras García | 109 | 0.36% | 1 | 0.48% |
| Gao Feng | 91 | 0.30% | 2 | 0.96% |
| Pablo M. Bermudo Garay | 80 | 0.26% | 1 | 0.48% |
| Laura Garcia Liebana | 54 | 0.18% | 1 | 0.48% |
| Florian Westphal | 49 | 0.16% | 5 | 2.40% |
| Johannes Berg | 39 | 0.13% | 2 | 0.96% |
| Tomasz Bursztyka | 21 | 0.07% | 2 | 0.96% |
| Nicolas Dichtel | 16 | 0.05% | 1 | 0.48% |
| Anders K. Pedersen | 12 | 0.04% | 1 | 0.48% |
| Phil Turnbull | 12 | 0.04% | 1 | 0.48% |
| Eric Dumazet | 11 | 0.04% | 1 | 0.48% |
| Arvind Yadav | 9 | 0.03% | 1 | 0.48% |
| Daniel Borkmann | 7 | 0.02% | 1 | 0.48% |
| Mirek Kratochvil | 7 | 0.02% | 1 | 0.48% |
| Julia Lawall | 6 | 0.02% | 1 | 0.48% |
| JingPiao Chen | 3 | 0.01% | 1 | 0.48% |
| Thomas Graf | 3 | 0.01% | 1 | 0.48% |
| Eric W. Biedermann | 3 | 0.01% | 1 | 0.48% |
| Xin Long | 1 | 0.00% | 1 | 0.48% |
| Dan Carpenter | 1 | 0.00% | 1 | 0.48% |
| simran singhal | 1 | 0.00% | 1 | 0.48% |
| Stephen Hemminger | 1 | 0.00% | 1 | 0.48% |
| Total | 30404 | 100.00% | 208 | 100.00% |
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