cregit-Linux how code gets into the kernel

Release 4.11 net/netfilter/nf_tables_api.c

Directory: net/netfilter
/*
 * 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/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; }

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Patrick McHardy4078.43%133.33%
Pablo Neira Ayuso1121.57%266.67%
Total51100.00%3100.00%

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); }

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Patrick McHardy2767.50%133.33%
Pablo Neira Ayuso1332.50%266.67%
Total40100.00%3100.00%

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; }

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Patrick McHardy3986.67%150.00%
Pablo Neira Ayuso613.33%150.00%
Total45100.00%2100.00%


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); }

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Patrick McHardy9090.91%150.00%
Pablo Neira Ayuso99.09%150.00%
Total99100.00%2100.00%


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; }

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Pablo Neira Ayuso109100.00%3100.00%
Total109100.00%3100.00%


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; }

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Pablo Neira Ayuso68100.00%4100.00%
Total68100.00%4100.00%


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); }

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Pablo Neira Ayuso32100.00%1100.00%
Total32100.00%1100.00%


static void nft_trans_destroy(struct nft_trans *trans) { list_del(&trans->list); kfree(trans); }

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Pablo Neira Ayuso24100.00%1100.00%
Total24100.00%1100.00%


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 || !(chain->flags & NFT_BASE_CHAIN)) return 0; return nf_register_net_hooks(net, nft_base_chain(chain)->ops, hook_nops); }

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PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso3862.30%360.00%
Arturo Borrero Gonzalez2032.79%120.00%
Eric W. Biedermann34.92%120.00%
Total61100.00%5100.00%


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 || !(chain->flags & NFT_BASE_CHAIN)) return; nf_unregister_net_hooks(net, nft_base_chain(chain)->ops, hook_nops); }

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Pablo Neira Ayuso3763.79%266.67%
Arturo Borrero Gonzalez2136.21%133.33%
Total58100.00%3100.00%


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; }

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Arturo Borrero Gonzalez5162.96%133.33%
Patrick McHardy2328.40%133.33%
Pablo Neira Ayuso78.64%133.33%
Total81100.00%3100.00%


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; }

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Arturo Borrero Gonzalez2758.70%133.33%
Patrick McHardy1430.43%133.33%
Pablo Neira Ayuso510.87%133.33%
Total46100.00%3100.00%


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

PersonTokensPropCommitsCommitProp
Arturo Borrero Gonzalez5972.84%125.00%
Pablo Neira Ayuso1113.58%250.00%
Patrick McHardy1113.58%125.00%
Total81100.00%4100.00%


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; }

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PersonTokensPropCommitsCommitProp
Arturo Borrero Gonzalez3871.70%133.33%
Pablo Neira Ayuso1528.30%266.67%
Total53100.00%3100.00%


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

PersonTokensPropCommitsCommitProp
Arturo Borrero Gonzalez3362.26%120.00%
Patrick McHardy1528.30%240.00%
Pablo Neira Ayuso59.43%240.00%
Total53100.00%5100.00%


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

PersonTokensPropCommitsCommitProp
Patrick McHardy4035.71%120.00%
Pablo Neira Ayuso3733.04%240.00%
Arturo Borrero Gonzalez3430.36%120.00%
Tomasz Bursztyka10.89%120.00%
Total112100.00%5100.00%


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

PersonTokensPropCommitsCommitProp
Patrick McHardy4257.53%125.00%
Arturo Borrero Gonzalez2736.99%125.00%
Pablo Neira Ayuso45.48%250.00%
Total73100.00%4100.00%


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

PersonTokensPropCommitsCommitProp
Arturo Borrero Gonzalez3162.00%133.33%
Patrick McHardy1734.00%133.33%
Pablo Neira Ayuso24.00%133.33%
Total50100.00%3100.00%


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

PersonTokensPropCommitsCommitProp
Arturo Borrero Gonzalez7260.00%120.00%
Patrick McHardy3831.67%120.00%
Pablo Neira Ayuso108.33%360.00%
Total120100.00%5100.00%


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

PersonTokensPropCommitsCommitProp
Arturo Borrero Gonzalez3967.24%125.00%
Patrick McHardy1118.97%125.00%
Pablo Neira Ayuso813.79%250.00%
Total58100.00%4100.00%


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

PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso91100.00%1100.00%
Total91100.00%1100.00%


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; }

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Pablo Neira Ayuso58100.00%1100.00%
Total58100.00%1100.00%

/* * 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

PersonTokensPropCommitsCommitProp
Patrick McHardy2641.27%125.00%
Arturo Borrero Gonzalez2539.68%125.00%
Pablo Neira Ayuso1219.05%250.00%
Total63100.00%4100.00%


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

PersonTokensPropCommitsCommitProp
Arturo Borrero Gonzalez3551.47%125.00%
Patrick McHardy2536.76%125.00%
Pablo Neira Ayuso811.76%250.00%
Total68100.00%4100.00%


static inline u64 nf_tables_alloc_handle(struct nft_table *table) { return ++table->hgenerator; }

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Arturo Borrero Gonzalez1477.78%150.00%
Patrick McHardy422.22%150.00%
Total18100.00%2100.00%

static const struct nf_chain_type *chain_type[AF_MAX][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

PersonTokensPropCommitsCommitProp
Arturo Borrero Gonzalez4863.16%133.33%
Pablo Neira Ayuso2228.95%133.33%
Patrick McHardy67.89%133.33%
Total76100.00%3100.00%


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

PersonTokensPropCommitsCommitProp
Arturo Borrero Gonzalez9575.40%125.00%
Pablo Neira Ayuso2217.46%250.00%
Patrick McHardy97.14%125.00%
Total126100.00%4100.00%

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_SUBSYS_NFTABLES << 8; 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; }

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PersonTokensPropCommitsCommitProp
Arturo Borrero Gonzalez10959.24%116.67%
Pablo Neira Ayuso7239.13%466.67%
Johannes Berg31.63%116.67%
Total184100.00%6100.00%


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

PersonTokensPropCommitsCommitProp
Arturo Borrero Gonzalez10973.65%116.67%
Pablo Neira Ayuso2919.59%466.67%
Patrick McHardy106.76%116.67%
Total148100.00%6100.00%


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; }

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Arturo Borrero Gonzalez15361.20%116.67%
Patrick McHardy6927.60%116.67%
Pablo Neira Ayuso2811.20%466.67%
Total250100.00%6100.00%


static int nf_tables_gettable(struct net *net, struct sock *nlsk, struct sk_buff *skb, const struct nlmsghdr *nlh, const struct nlattr * const nla[]) { 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; }

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PersonTokensPropCommitsCommitProp
Arturo Borrero Gonzalez15362.20%111.11%
Pablo Neira Ayuso4919.92%666.67%
Patrick McHardy4417.89%222.22%
Total246100.00%9100.00%


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 (!(chain->flags & NFT_BASE_CHAIN)) continue; if (cnt && i++ == cnt) break; nf_unregister_net_hooks(net, nft_base_chain(chain)->ops, afi->nops); } }

Contributors

PersonTokensPropCommitsCommitProp
Arturo Borrero Gonzalez2930.85%114.29%
Pablo Neira Ayuso2526.60%457.14%
Patrick McHardy2122.34%114.29%
Gao Feng1920.21%114.29%
Total94100.00%7100.00%


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 (!(chain->flags & NFT_BASE_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

PersonTokensPropCommitsCommitProp
Gao Feng6554.17%114.29%
Arturo Borrero Gonzalez2420.00%114.29%
Pablo Neira Ayuso1915.83%342.86%
Patrick McHardy1210.00%228.57%
Total120100.00%7100.00%


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

PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso1648.48%342.86%
Arturo Borrero Gonzalez1030.30%114.29%
Gao Feng412.12%114.29%
Patrick McHardy39.09%228.57%
Total33100.00%7100.00%


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

PersonTokensPropCommitsCommitProp
Arturo Borrero Gonzalez18176.69%125.00%
Patrick McHardy3916.53%125.00%
Pablo Neira Ayuso166.78%250.00%
Total236100.00%4100.00%


static int nf_tables_newtable(struct net *net, struct sock *nlsk, struct sk_buff *skb, const struct nlmsghdr *nlh, const struct nlattr * const nla[]) { 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; nla_strlcpy(table->name, name, NFT_TABLE_MAXNAMELEN); 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 err3; list_add_tail_rcu(&table->list, &afi->tables); return 0; err3: kfree(table); err2: module_put(afi->owner); err1: return err; }

Contributors

PersonTokensPropCommitsCommitProp
Arturo Borrero Gonzalez25863.70%19.09%
Pablo Neira Ayuso9523.46%763.64%
Patrick McHardy4310.62%19.09%
Eric Dumazet81.98%19.09%
Gao Feng10.25%19.09%
Total405100.00%11100.00%


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

PersonTokensPropCommitsCommitProp
Arturo Borrero Gonzalez12151.93%120.00%
Pablo Neira Ayuso11248.07%480.00%
Total233100.00%5100.00%


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

PersonTokensPropCommitsCommitProp
Arturo Borrero Gonzalez13491.16%150.00%
Pablo Neira Ayuso138.84%150.00%
Total147100.00%2100.00%


static int nf_tables_deltable(struct net *net, struct sock *nlsk, struct sk_buff *skb, const struct nlmsghdr *nlh, const struct nlattr * const nla[]) { 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); ctx.afi = afi; ctx.table = table; return nft_flush_table(&ctx); }

Contributors

PersonTokensPropCommitsCommitProp
Arturo Borrero Gonzalez12466.31%233.33%
Patrick McHardy4423.53%116.67%
Pablo Neira Ayuso1910.16%350.00%
Total187100.00%6100.00%


static void nf_tables_table_destroy(struct nft_ctx *ctx) { BUG_ON(ctx->table->use > 0); kfree(ctx->table); module_put(ctx->afi->owner); }

Contributors

PersonTokensPropCommitsCommitProp
Arturo Borrero Gonzalez2668.42%125.00%
Pablo Neira Ayuso923.68%250.00%
Patrick McHardy37.89%125.00%
Total38100.00%4100.00%


int nft_register_chain_type(const struct nf_chain_type *ctype) { int err = 0; 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

PersonTokensPropCommitsCommitProp
Arturo Borrero Gonzalez3650.70%125.00%
Patrick McHardy3143.66%125.00%
Pablo Neira Ayuso45.63%250.00%
Total71100.00%4100.00%

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

PersonTokensPropCommitsCommitProp
Arturo Borrero Gonzalez2777.14%150.00%
Patrick McHardy822.86%150.00%
Total35100.00%2100.00%

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

PersonTokensPropCommitsCommitProp
Patrick McHardy2846.67%133.33%
Arturo Borrero Gonzalez2236.67%133.33%
Pablo Neira Ayuso1016.67%133.33%
Total60100.00%3100.00%


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

PersonTokensPropCommitsCommitProp
Patrick McHardy4556.25%120.00%
Arturo Borrero Gonzalez2328.75%120.00%
Pablo Neira Ayuso1215.00%360.00%
Total80100.00%5100.00%

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

PersonTokensPropCommitsCommitProp
Arturo Borrero Gonzalez13671.58%120.00%
Pablo Neira Ayuso5026.32%360.00%
Nicolas Dichtel42.11%120.00%
Total190100.00%5100.00%


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_SUBSYS_NFTABLES << 8; 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 (chain->flags & NFT_BASE_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 (nft_dump_stats(skb, nft_base_chain(chain)->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

PersonTokensPropCommitsCommitProp
Arturo Borrero Gonzalez28270.85%114.29%
Pablo Neira Ayuso11127.89%457.14%
Johannes Berg30.75%114.29%
Nicolas Dichtel20.50%114.29%
Total398100.00%7100.00%


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

PersonTokensPropCommitsCommitProp
Arturo Borrero Gonzalez13488.16%125.00%
Pablo Neira Ayuso1811.84%375.00%
Total152100.00%4100.00%


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

PersonTokensPropCommitsCommitProp
Arturo Borrero Gonzalez14855.22%114.29%
Patrick McHardy7126.49%228.57%
Pablo Neira Ayuso4918.28%457.14%
Total268100.00%7100.00%


static int nf_tables_getchain(struct net *net, struct sock *nlsk, struct sk_buff *skb, const struct nlmsghdr *nlh, const struct nlattr * const nla[]) { 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

PersonTokensPropCommitsCommitProp
Arturo Borrero Gonzalez18064.06%110.00%
Pablo Neira Ayuso6623.49%770.00%
Patrick McHardy3512.46%220.00%
Total281100.00%10100.00%

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); 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

PersonTokensPropCommitsCommitProp
Arturo Borrero Gonzalez8555.56%114.29%
Patrick McHardy4730.72%457.14%
Pablo Neira Ayuso2113.73%228.57%
Total153100.00%7100.00%


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

PersonTokensPropCommitsCommitProp
Arturo Borrero Gonzalez4866.67%120.00%
Patrick McHardy1622.22%360.00%
Pablo Neira Ayuso811.11%120.00%
Total72100.00%5100.00%


static void nf_tables_chain_destroy(struct nft_chain *chain) { BUG_ON(chain->use > 0); if (chain->flags & NFT_BASE_CHAIN) { struct nft_base_chain *basechain = nft_base_chain(chain); module_put(basechain->type->owner); free_percpu(basechain->stats); if (basechain->ops[0].dev != NULL) dev_put(basechain->ops[0].dev); kfree(basechain); } else { kfree(chain); } }

Contributors

PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso3739.36%233.33%
Arturo Borrero Gonzalez3638.30%116.67%
Patrick McHardy2122.34%350.00%
Total94100.00%6100.00%

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); 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

PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso27880.35%450.00%
Arturo Borrero Gonzalez5616.18%112.50%
Patrick McHardy123.47%337.50%
Total346100.00%8100.00%


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

PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso35100.00%1100.00%
Total35100.00%1100.00%


static int nf_tables_newchain(struct net *net, struct sock *nlsk, struct sk_buff *skb, const struct nlmsghdr *nlh, const struct nlattr * const nla[]) { const struct nfgenmsg *nfmsg = nlmsg_data(nlh); const struct nlattr * uninitialized_var(name); struct nft_af_info *afi; struct nft_table *table; struct nft_chain *chain; struct nft_base_chain *basechain = NULL; u8 genmask = nft_genmask_next(net); int family = nfmsg->nfgen_family; u8 policy = NF_ACCEPT; u64 handle = 0; unsigned int i; struct nft_stats __percpu *stats; int err; bool create; struct nft_ctx ctx; 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 && !(chain->flags & NFT_BASE_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; } } if (chain != NULL) { struct nft_stats *stats = NULL; struct nft_trans *trans; if (nlh->nlmsg_flags & NLM_F_EXCL) return -EEXIST; if (nlh->nlmsg_flags & NLM_F_REPLACE) return -EOPNOTSUPP; if (nla[NFTA_CHAIN_HOOK]) { struct nft_base_chain *basechain; struct nft_chain_hook hook; struct nf_hook_ops *ops; if (!(chain->flags & NFT_BASE_CHAIN)) return -EBUSY; err = nft_chain_parse_hook(net, nla, 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] && name) { struct nft_chain *chain2; chain2 = nf_tables_chain_lookup(table, nla[NFTA_CHAIN_NAME], genmask); if (IS_ERR(chain2)) return PTR_ERR(chain2); } if (nla[NFTA_CHAIN_COUNTERS]) { if (!(chain->flags & NFT_BASE_CHAIN)) return -EOPNOTSUPP; stats = nft_stats_alloc(nla[NFTA_CHAIN_COUNTERS]); if (IS_ERR(stats)) return PTR_ERR(stats); } nft_ctx_init(&ctx, net, skb, nlh, afi, table, chain, nla); 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; if (nla[NFTA_CHAIN_HANDLE] && name) { nla_strlcpy(nft_trans_chain_name(trans), name, NFT_CHAIN_MAXNAMELEN); } list_add_tail(&trans->list, &net->nft.commit_list); return 0; } 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; } else { stats = netdev_alloc_pcpu_stats(struct nft_stats); if (stats == NULL) { nft_chain_release_hook(&hook); kfree(basechain); return -ENOMEM; } rcu_assign_pointer(basechain->stats, stats); } 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; nla_strlcpy(chain->name, name, NFT_CHAIN_MAXNAMELEN); err = nf_tables_register_hooks(net, table, chain, afi->nops); if (err < 0) goto err1; nft_ctx_init(&ctx, net, skb, nlh, afi, table, chain, nla); 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; }

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PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso72955.73%1470.00%
Arturo Borrero Gonzalez39630.28%15.00%
Patrick McHardy17613.46%315.00%
Sabrina Dubroca40.31%15.00%
Tomasz Bursztyka30.23%15.00%
Total1308100.00%20100.00%


static int nf_tables_delchain(struct net *net, struct sock *nlsk, struct sk_buff *skb, const struct nlmsghdr *nlh, const struct nlattr * const nla[]) { 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; int family = nfmsg->nfgen_family; 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_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 (chain->use > 0) return -EBUSY; nft_ctx_init(&ctx, net, skb, nlh, afi, table, chain, nla); return nft_delchain(&ctx); }

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PersonTokensPropCommitsCommitProp
Arturo Borrero Gonzalez13870.05%116.67%
Patrick McHardy4020.30%233.33%
Pablo Neira Ayuso199.64%350.00%
Total197100.00%6100.00%

/* * 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; }

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Arturo Borrero Gonzalez3564.81%125.00%
Patrick McHardy1935.19%375.00%
Total54100.00%4100.00%

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); }

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Arturo Borrero Gonzalez1760.71%150.00%
Patrick McHardy1139.29%150.00%
Total28100.00%2100.00%

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; }

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Arturo Borrero Gonzalez5382.81%150.00%
Patrick McHardy1117.19%150.00%
Total64100.00%2100.00%


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); }

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Arturo Borrero Gonzalez15891.33%150.00%
Patrick McHardy158.67%150.00%
Total173100.00%2100.00%

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; }

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PersonTokensPropCommitsCommitProp
Patrick McHardy6057.69%133.33%
Arturo Borrero Gonzalez4240.38%133.33%
Eric Leblond21.92%133.33%
Total104100.00%3100.00%

;
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; }

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Patrick McHardy72100.00%1100.00%
Total72100.00%1100.00%

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); 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); 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; }

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PersonTokensPropCommitsCommitProp
Arturo Borrero Gonzalez16567.35%120.00%
Patrick McHardy6024.49%120.00%
Pablo Neira Ayuso208.16%360.00%
Total245100.00%5100.00%


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; } return 0; err1: expr->ops = NULL; return err; }

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Arturo Borrero Gonzalez7882.11%150.00%
Pablo Neira Ayuso1717.89%150.00%
Total95100.00%2100.00%


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); }

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Arturo Borrero Gonzalez3370.21%150.00%
Pablo Neira Ayuso1429.79%150.00%
Total47100.00%2100.00%


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); }

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Patrick McHardy12393.89%150.00%
Liping Zhang86.11%150.00%
Total131100.00%2100.00%


void nft_expr_destroy(const struct nft_ctx *ctx, struct nft_expr *expr) { nf_tables_expr_destroy(ctx, expr); kfree(expr); }

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Patrick McHardy28100.00%1100.00%
Total28100.00%1100.00%

/* * 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); }

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Arturo Borrero Gonzalez3874.51%150.00%
Pablo Neira Ayuso1325.49%150.00%
Total51100.00%2100.00%


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))); }

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PersonTokensPropCommitsCommitProp
Arturo Borrero Gonzalez47100.00%1100.00%
Total47100.00%1100.00%

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; int type = event | NFNL_SUBSYS_NFTABLES << 8; 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_entry(rule->list.prev, struct nft_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; }

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PersonTokensPropCommitsCommitProp
Arturo Borrero Gonzalez32886.09%114.29%
Patrick McHardy287.35%228.57%
Pablo Neira Ayuso184.72%228.57%
Nicolas Dichtel41.05%114.29%
Johannes Berg30.79%114.29%
Total381100.00%7100.00%


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); }

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PersonTokensPropCommitsCommitProp
Arturo Borrero Gonzalez13785.62%125.00%
Pablo Neira Ayuso2314.38%375.00%
Total160100.00%4100.00%

struct nft_rule_dump_ctx { char table[NFT_TABLE_MAXNAMELEN]; char chain[NFT_CHAIN_MAXNAMELEN]; };
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[0] && 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; }

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Patrick McHardy23266.29%112.50%
Pablo Neira Ayuso11833.71%787.50%
Total350100.00%8100.00%


static int nf_tables_dump_rules_done(struct netlink_callback *cb) { kfree(cb->data); return 0; }

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Pablo Neira Ayuso21100.00%1100.00%
Total21100.00%1100.00%


static int nf_tables_getrule(struct net *net, struct sock *nlsk, struct sk_buff *skb, const struct nlmsghdr *nlh, const struct nlattr * const nla[]) { 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]) nla_strlcpy(ctx->table, nla[NFTA_RULE_TABLE], sizeof(ctx->table)); if (nla[NFTA_RULE_CHAIN]) nla_strlcpy(ctx->chain, nla[NFTA_RULE_CHAIN], sizeof(ctx->chain)); 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; }

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Patrick McHardy29370.10%114.29%
Pablo Neira Ayuso12529.90%685.71%
Total418100.00%7100.00%


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

PersonTokensPropCommitsCommitProp
Patrick McHardy4773.44%233.33%
Arturo Borrero Gonzalez710.94%116.67%
Pablo Neira Ayuso69.38%233.33%
Florian Westphal46.25%116.67%
Total64100.00%6100.00%

#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[]) { 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

PersonTokensPropCommitsCommitProp
Patrick McHardy58560.12%521.74%
Pablo Neira Ayuso24525.18%1669.57%
Eric Leblond9910.17%14.35%
Arturo Borrero Gonzalez444.52%14.35%
Total973100.00%23100.00%


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

PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso81100.00%1100.00%
Total81100.00%1100.00%


static int nf_tables_delrule(struct net *net, struct sock *nlsk, struct sk_buff *skb, const struct nlmsghdr *nlh, const struct nlattr * const nla[]) { 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

PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso29784.38%770.00%
Patrick McHardy5214.77%110.00%
Arturo Borrero Gonzalez30.85%220.00%
Total352100.00%10100.00%

/* * Sets */ static LIST_HEAD(nf_tables_set_ops);
int nft_register_set(struct nft_set_ops *ops) { nfnl_lock(NFNL_SUBSYS_NFTABLES); list_add_tail_rcu(&ops->list, &nf_tables_set_ops); nfnl_unlock(NFNL_SUBSYS_NFTABLES); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso2882.35%375.00%
Patrick McHardy617.65%125.00%
Total34100.00%4100.00%

EXPORT_SYMBOL_GPL(nft_register_set);
void nft_unregister_set(struct nft_set_ops *ops) { nfnl_lock(NFNL_SUBSYS_NFTABLES); list_del_rcu(&ops->list); nfnl_unlock(NFNL_SUBSYS_NFTABLES); }

Contributors

PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso2382.14%480.00%
Patrick McHardy517.86%120.00%
Total28100.00%5100.00%

EXPORT_SYMBOL_GPL(nft_unregister_set); /* * 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 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; u32 features; #ifdef CONFIG_MODULES if (list_empty(&nf_tables_set_ops)) { nfnl_unlock(NFNL_SUBSYS_NFTABLES); request_module("nft-set"); nfnl_lock(NFNL_SUBSYS_NFTABLES); if (!list_empty(&nf_tables_set_ops)) return ERR_PTR(-EAGAIN); } #endif features = 0; if (nla[NFTA_SET_FLAGS] != NULL) { features = ntohl(nla_get_be32(nla[NFTA_SET_FLAGS])); features &= NFT_SET_INTERVAL | NFT_SET_MAP | NFT_SET_TIMEOUT | NFT_SET_OBJECT; } bops = NULL; best.size = ~0; best.lookup = ~0; best.space = ~0; list_for_each_entry(ops, &nf_tables_set_ops, list) { if ((ops->features & features) != features) continue; if (!ops->estimate(desc, features, &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(ops->owner)) continue; if (bops != NULL) module_put(bops->owner); bops = ops; best = est; } if (bops != NULL) return bops; return ERR_PTR(-EOPNOTSUPP); }

Contributors

PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso28577.66%666.67%
Patrick McHardy8222.34%333.33%
Total367100.00%9100.00%

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

PersonTokensPropCommitsCommitProp
Patrick McHardy14283.53%337.50%
Pablo Neira Ayuso2816.47%562.50%
Total170100.00%8100.00%


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

PersonTokensPropCommitsCommitProp
Patrick McHardy6987.34%150.00%
Pablo Neira Ayuso1012.66%150.00%
Total79100.00%2100.00%

EXPORT_SYMBOL_GPL(nf_tables_set_lookup);
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

PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso90100.00%2100.00%
Total90100.00%2100.00%

EXPORT_SYMBOL_GPL(nf_tables_set_lookup_byid);
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 = strnchr(name, NFT_SET_MAXNAMELEN, '%'); 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); } snprintf(set->name, sizeof(set->name), name, min + n); list_for_each_entry(i, &ctx->table->sets, list) { if (!nft_is_active_next(ctx->net, i)) continue; if (!strcmp(set->name, i->name)) return -ENFILE; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Patrick McHardy21875.17%342.86%
Pablo Neira Ayuso6522.41%342.86%
Daniel Borkmann72.41%114.29%
Total290100.00%7100.00%


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_SUBSYS_NFTABLES << 8; 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

PersonTokensPropCommitsCommitProp
Patrick McHardy34472.12%216.67%
Pablo Neira Ayuso7615.93%541.67%
Arturo Borrero Gonzalez296.08%18.33%
Carlos Falgueras García204.19%18.33%
Johannes Berg30.63%18.33%
Anders K. Pedersen30.63%18.33%
Nicolas Dichtel20.42%18.33%
Total477100.00%12100.00%


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

PersonTokensPropCommitsCommitProp
Patrick McHardy12285.92%120.00%
Pablo Neira Ayuso2014.08%480.00%
Total142100.00%5100.00%


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; }

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PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso353100.00%5100.00%
Total353100.00%5100.00%


static int nf_tables_dump_sets_done(struct netlink_callback *cb) { kfree(cb->data); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Patrick McHardy1885.71%150.00%
Pablo Neira Ayuso314.29%150.00%
Total21100.00%2100.00%


static int nf_tables_getset(struct net *net, struct sock *nlsk, struct sk_buff *skb, const struct nlmsghdr *nlh, const struct nlattr * const nla[]) { 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

PersonTokensPropCommitsCommitProp
Patrick McHardy20166.78%111.11%
Pablo Neira Ayuso8728.90%666.67%
Phil Turnbull123.99%111.11%
Stephen Hemminger10.33%111.11%
Total301100.00%9100.00%


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); 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

PersonTokensPropCommitsCommitProp
Patrick McHardy5969.41%133.33%
Pablo Neira Ayuso2630.59%266.67%
Total85100.00%3100.00%


static int nf_tables_newset(struct net *net, struct sock *nlsk, struct sk_buff *skb, const struct nlmsghdr *nlh, const struct nlattr * const nla[]) { 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[NFT_SET_MAXNAMELEN]; 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(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); err = -ENOMEM; set = kzalloc(sizeof(*set) + size + udlen, GFP_KERNEL); if (set == NULL) goto err1; nla_strlcpy(name, nla[NFTA_SET_NAME], sizeof(set->name)); err = nf_tables_set_alloc_name(&ctx, set, 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: kfree(set); err1: module_put(ops->owner); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Patrick McHardy81968.59%522.73%
Pablo Neira Ayuso28223.62%1254.55%
Carlos Falgueras García736.11%14.55%
Liping Zhang100.84%14.55%
Arturo Borrero Gonzalez60.50%14.55%
Anders K. Pedersen30.25%14.55%
Gao Feng10.08%14.55%
Total1194100.00%22100.00%


static void nft_set_destroy(struct nft_set *set) { set->ops->destroy(set); module_put(set->ops->owner); kfree(set); }

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PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso34100.00%1100.00%
Total34100.00%1100.00%


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

PersonTokensPropCommitsCommitProp
Patrick McHardy3790.24%125.00%
Pablo Neira Ayuso49.76%375.00%
Total41100.00%4100.00%


static int nf_tables_delset(struct net *net, struct sock *nlsk, struct sk_buff *skb, const struct nlmsghdr *nlh, const struct nlattr * const nla[]) { 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)) return -EBUSY; return nft_delset(&ctx, set); }

Contributors

PersonTokensPropCommitsCommitProp
Patrick McHardy13981.29%228.57%
Pablo Neira Ayuso3017.54%457.14%
Arturo Borrero Gonzalez21.17%114.29%
Total171100.00%7100.00%


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

PersonTokensPropCommitsCommitProp
Patrick McHardy7792.77%480.00%
Pablo Neira Ayuso67.23%120.00%
Total83100.00%5100.00%


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

PersonTokensPropCommitsCommitProp
Patrick McHardy16692.74%240.00%
Pablo Neira Ayuso126.70%240.00%
Liping Zhang10.56%120.00%
Total179100.00%5100.00%

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

PersonTokensPropCommitsCommitProp
Patrick McHardy5183.61%125.00%
Pablo Neira Ayuso1016.39%375.00%
Total61100.00%4100.00%

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

PersonTokensPropCommitsCommitProp
Patrick McHardy11988.15%120.00%
Pablo Neira Ayuso1611.85%480.00%
Total135100.00%5100.00%


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

PersonTokensPropCommitsCommitProp
Patrick McHardy35190.23%562.50%
Pablo Neira Ayuso317.97%112.50%
Nicolas Dichtel41.03%112.50%
Anders K. Pedersen30.77%112.50%
Total389100.00%8100.00%

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

PersonTokensPropCommitsCommitProp
Patrick McHardy57100.00%1100.00%
Total57100.00%1100.00%


static int nf_tables_dump_set(struct sk_buff *skb, struct netlink_callback *cb) { struct net *net = sock_net(skb->sk); u8 genmask = nft_genmask_cur(net); struct nft_set *set; struct nft_set_dump_args args; struct nft_ctx ctx; struct nlattr *nla[NFTA_SET_ELEM_LIST_MAX + 1]; struct nfgenmsg *nfmsg; struct nlmsghdr *nlh; struct nlattr *nest; u32 portid, seq; int event, err; err = nlmsg_parse(cb->nlh, sizeof(struct nfgenmsg), nla, NFTA_SET_ELEM_LIST_MAX, nft_set_elem_list_policy); if (err < 0) return err; err = nft_ctx_init_from_elemattr(&ctx, net, cb->skb, cb->nlh, (void *)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); event = NFT_MSG_NEWSETELEM; event |= NFNL_SUBSYS_NFTABLES << 8; 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 = ctx.afi->family; nfmsg->version = NFNETLINK_V0; nfmsg->res_id = htons(ctx.net->nft.base_seq & 0xffff); if (nla_put_string(skb, NFTA_SET_ELEM_LIST_TABLE, ctx.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(ctx.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(&ctx, set, &args.iter); 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: return -ENOSPC; }

Contributors

PersonTokensPropCommitsCommitProp
Patrick McHardy43088.11%112.50%
Pablo Neira Ayuso5611.48%675.00%
Michal Nazarewicz20.41%112.50%
Total488100.00%8100.00%


static int nf_tables_getsetelem(struct net *net, struct sock *nlsk, struct sk_buff *skb, const struct nlmsghdr *nlh, const struct nlattr * const nla[]) { 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, }; return netlink_dump_start(nlsk, skb, nlh, &c); } return -EOPNOTSUPP; }

Contributors

PersonTokensPropCommitsCommitProp
Patrick McHardy13187.33%120.00%
Pablo Neira Ayuso1912.67%480.00%
Total150100.00%5100.00%


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_SUBSYS_NFTABLES << 8; 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; }

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PersonTokensPropCommitsCommitProp
Arturo Borrero Gonzalez15665.82%120.00%
Patrick McHardy6326.58%120.00%
Pablo Neira Ayuso156.33%240.00%
Johannes Berg31.27%120.00%
Total237100.00%5100.00%


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

PersonTokensPropCommitsCommitProp
Arturo Borrero Gonzalez11371.97%125.00%
Patrick McHardy3220.38%125.00%
Pablo Neira Ayuso127.64%250.00%
Total157100.00%4100.00%


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

PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso3863.33%150.00%
Patrick McHardy2236.67%150.00%
Total60100.00%2100.00%


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; }

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PersonTokensPropCommitsCommitProp
Patrick McHardy161100.00%3100.00%
Total161100.00%3100.00%


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_uninit(nft_set_ext_key(ext), NFT_DATA_VALUE); if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA)) nft_data_uninit(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

PersonTokensPropCommitsCommitProp
Patrick McHardy8276.64%250.00%
Pablo Neira Ayuso2018.69%125.00%
Liping Zhang54.67%125.00%
Total107100.00%4100.00%

EXPORT_SYMBOL_GPL(nft_set_elem_destroy);
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

PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso77100.00%1100.00%
Total77100.00%1100.00%


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); 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) && 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_uninit(&data, d2.type); err2: nft_data_uninit(&elem.key.val, d1.type); err1: return err; }

Contributors

PersonTokensPropCommitsCommitProp
Patrick McHardy76967.46%1451.85%
Pablo Neira Ayuso35631.23%1037.04%
Liping Zhang70.61%13.70%
Arturo Borrero Gonzalez50.44%13.70%
Anders K. Pedersen30.26%13.70%
Total1140100.00%27100.00%


static int nf_tables_newsetelem(struct net *net, struct sock *nlsk, struct sk_buff *skb, const struct nlmsghdr *nlh, const struct nlattr * const nla[]) { 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

PersonTokensPropCommitsCommitProp
Patrick McHardy15368.61%222.22%
Pablo Neira Ayuso7031.39%777.78%
Total223100.00%9100.00%


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); 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_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_uninit(&elem.key.val, desc.type); err1: return err; }

Contributors

PersonTokensPropCommitsCommitProp
Patrick McHardy21550.47%541.67%
Pablo Neira Ayuso19746.24%433.33%
Julia Lawall61.41%18.33%
Arturo Borrero Gonzalez51.17%18.33%
Thomas Graf30.70%18.33%
Total426100.00%12100.00%


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

PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso142100.00%3100.00%
Total142100.00%3100.00%


static int nf_tables_delsetelem(struct net *net, struct sock *nlsk, struct sk_buff *skb, const struct nlmsghdr *nlh, const struct nlattr * const nla[]) { 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

PersonTokensPropCommitsCommitProp
Patrick McHardy15367.70%222.22%
Pablo Neira Ayuso7332.30%777.78%
Total226100.00%9100.00%


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

PersonTokensPropCommitsCommitProp
Patrick McHardy7197.26%150.00%
Liping Zhang22.74%150.00%
Total73100.00%2100.00%

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

PersonTokensPropCommitsCommitProp
Patrick McHardy54100.00%1100.00%
Total54100.00%1100.00%

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

PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso4495.65%266.67%
Patrick McHardy24.35%133.33%
Total46100.00%3100.00%

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); }

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PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso28100.00%1100.00%
Total28100.00%1100.00%

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->type->type && nft_active_genmask(obj, genmask)) return obj; } return ERR_PTR(-ENOENT); }

Contributors

PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso77100.00%1100.00%
Total77100.00%1100.00%

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_object_type *type, const struct nlattr *attr) { struct nlattr *tb[type->maxattr + 1]; struct nft_object *obj; int err; if (attr) { err = nla_parse_nested(tb, type->maxattr, attr, type->policy); if (err < 0) goto err1; } else { memset(tb, 0, sizeof(tb[0]) * (type->maxattr + 1)); } err = -ENOMEM; obj = kzalloc(sizeof(struct nft_object) + type->size, GFP_KERNEL); if (obj == NULL) goto err1; err = type->init((const struct nlattr * const *)tb, obj); if (err < 0) goto err2; obj->type = type; return obj; err2: kfree(obj); err1: return ERR_PTR(err); }

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PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso181100.00%1100.00%
Total181100.00%1100.00%


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->type->dump(skb, obj, reset) < 0) goto nla_put_failure; nla_nest_end(skb, nest); return 0; nla_put_failure: return -1; }

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PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso81100.00%2100.00%
Total81100.00%2100.00%


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; }

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PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso42100.00%1100.00%
Total42100.00%1100.00%


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

PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso92100.00%1100.00%
Total92100.00%1100.00%


static int nf_tables_newobj(struct net *net, struct sock *nlsk, struct sk_buff *skb, const struct nlmsghdr *nlh, const struct nlattr * const nla[]) { 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(type, nla[NFTA_OBJ_DATA]); if (IS_ERR(obj)) { err = PTR_ERR(obj); goto err1; } obj->table = table; nla_strlcpy(obj->name, nla[NFTA_OBJ_NAME], NFT_OBJ_MAXNAMELEN); err = nft_trans_obj_add(&ctx, NFT_MSG_NEWOBJ, obj); if (err < 0) goto err2; list_add_tail_rcu(&obj->list, &table->objects); table->use++; return 0; err2: if (obj->type->destroy) obj->type->destroy(obj); kfree(obj); err1: module_put(type->owner); return err; }

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PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso40899.76%266.67%
Gao Feng10.24%133.33%
Total409100.00%3100.00%


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_SUBSYS_NFTABLES << 8; 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->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

PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso216100.00%2100.00%
Total216100.00%2100.00%

struct nft_obj_filter { char table[NFT_OBJ_MAXNAMELEN]; 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->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; }

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PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso34898.86%375.00%
Liping Zhang41.14%125.00%
Total352100.00%4100.00%


static int nf_tables_dump_obj_done(struct netlink_callback *cb) { kfree(cb->data); return 0; }

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PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso21100.00%1100.00%
Total21100.00%1100.00%


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]) nla_strlcpy(filter->table, nla[NFTA_OBJ_TABLE], NFT_TABLE_MAXNAMELEN); if (nla[NFTA_OBJ_TYPE]) filter->type = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE])); return filter; }

Contributors

PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso92100.00%1100.00%
Total92100.00%1100.00%


static int nf_tables_getobj(struct net *net, struct sock *nlsk, struct sk_buff *skb, const struct nlmsghdr *nlh, const struct nlattr * const nla[]) { 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; return 0; }

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Pablo Neira Ayuso389100.00%3100.00%
Total389100.00%3100.00%


static void nft_obj_destroy(struct nft_object *obj) { if (obj->type->destroy) obj->type->destroy(obj); module_put(obj->type->owner); kfree(obj); }

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Pablo Neira Ayuso42100.00%1100.00%
Total42100.00%1100.00%


static int nf_tables_delobj(struct net *net, struct sock *nlsk, struct sk_buff *skb, const struct nlmsghdr *nlh, const struct nlattr * const nla[]) { 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); }

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Pablo Neira Ayuso235100.00%1100.00%
Total235100.00%1100.00%


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); }

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Pablo Neira Ayuso149100.00%4100.00%
Total149100.00%4100.00%

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); }

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Pablo Neira Ayuso55100.00%2100.00%
Total55100.00%2100.00%


static int nf_tables_fill_gen_info(struct sk_buff *skb, struct net *net, u32 portid, u32 seq) { struct nlmsghdr *nlh; struct nfgenmsg *nfmsg; int event = (NFNL_SUBSYS_NFTABLES << 8) | 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))) goto nla_put_failure; nlmsg_end(skb, nlh); return 0; nla_put_failure: nlmsg_trim(skb, nlh); return -EMSGSIZE; }

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Pablo Neira Ayuso14394.70%250.00%
Patrick McHardy53.31%125.00%
Johannes Berg31.99%125.00%
Total151100.00%4100.00%


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); }

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Pablo Neira Ayuso150100.00%2100.00%
Total150100.00%2100.00%


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 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; }

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Pablo Neira Ayuso116100.00%2100.00%
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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)[0]) strcpy(trans->ctx.chain->name, nft_trans_chain_name(trans)); if (!(trans->ctx.chain->flags & NFT_BASE_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; } }

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Pablo Neira Ayuso104100.00%1100.00%
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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: nft_set_elem_destroy(nft_trans_elem_set(trans), nft_trans_elem(trans).priv, true); break; case NFT_MSG_DELOBJ: nft_obj_destroy(nft_trans_obj(trans)); break; } kfree(trans); }

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Pablo Neira Ayuso9081.08%360.00%
Patrick McHardy1917.12%120.00%
Liping Zhang21.80%120.00%
Total111100.00%5100.00%


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; }

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Pablo Neira Ayuso63291.86%2485.71%
Patrick McHardy537.70%310.71%
Arturo Borrero Gonzalez30.44%13.57%
Total688100.00%28100.00%


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); }

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Pablo Neira Ayuso9081.08%880.00%
Patrick McHardy1917.12%110.00%
Liping Zhang21.80%110.00%
Total111100.00%10100.00%


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; 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; }

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Pablo Neira Ayuso50793.03%2184.00%
Patrick McHardy346.24%28.00%
Arturo Borrero Gonzalez30.55%14.00%
Xin Long10.18%14.00%
Total545100.00%25100.00%


static bool nf_tables_valid_genid(struct net *net, u32 genid) { return net->nft.base_seq == genid; }

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Pablo Neira Ayuso23100.00%1100.00%
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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 (chain->flags & NFT_BASE_CHAIN) { basechain = nft_base_chain(chain); if (basechain->type->type != type) return -EOPNOTSUPP; } return 0; }

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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 (chain->flags & NFT_BASE_CHAIN) { basechain = nft_base_chain(chain); if ((1 << basechain->ops[0].hooknum) & hook_flags) return 0; return -EOPNOTSUPP; } return 0; }

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Pablo Neira Ayuso64100.00%1100.00%
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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; } }

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Patrick McHardy10092.59%375.00%
Pablo Neira Ayuso87.41%125.00%
Total108100.00%4100.00%


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; }

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Patrick McHardy25382.68%457.14%
Pablo Neira Ayuso5317.32%342.86%
Total306100.00%7100.00%

/** * 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; }

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Laura Garcia Liebana4897.96%150.00%
Dan Carpenter12.04%150.00%
Total49100.00%2100.00%

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

PersonTokensPropCommitsCommitProp
Patrick McHardy54100.00%2100.00%
Total54100.00%2100.00%

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

PersonTokensPropCommitsCommitProp
Patrick McHardy64100.00%2100.00%
Total64100.00%2100.00%

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

PersonTokensPropCommitsCommitProp
Patrick McHardy60100.00%3100.00%
Total60100.00%3100.00%

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

PersonTokensPropCommitsCommitProp
Patrick McHardy216100.00%8100.00%
Total216100.00%8100.00%

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); 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 (chain->flags & NFT_BASE_CHAIN) return -EOPNOTSUPP; chain->use++; data->verdict.chain = chain; break; } desc->len = sizeof(data->verdict); desc->type = NFT_DATA_VERDICT; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Patrick McHardy23393.57%360.00%
Pablo Neira Ayuso124.82%120.00%
Florian Westphal41.61%120.00%
Total249100.00%5100.00%


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

PersonTokensPropCommitsCommitProp
Patrick McHardy38100.00%2100.00%
Total38100.00%2100.00%


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

PersonTokensPropCommitsCommitProp
Patrick McHardy9991.67%266.67%
Florian Westphal98.33%133.33%
Total108100.00%3100.00%


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

PersonTokensPropCommitsCommitProp
Patrick McHardy89100.00%2100.00%
Total89100.00%2100.00%


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

PersonTokensPropCommitsCommitProp
Patrick McHardy35100.00%1100.00%
Total35100.00%1100.00%

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); 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

PersonTokensPropCommitsCommitProp
Patrick McHardy120100.00%2100.00%
Total120100.00%2100.00%

EXPORT_SYMBOL_GPL(nft_data_init); /** * nft_data_uninit - 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_uninit(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

PersonTokensPropCommitsCommitProp
Patrick McHardy3683.72%150.00%
Mirek Kratochvil716.28%150.00%
Total43100.00%2100.00%

EXPORT_SYMBOL_GPL(nft_data_uninit);
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

PersonTokensPropCommitsCommitProp
Patrick McHardy10995.61%150.00%
Florian Westphal54.39%150.00%
Total114100.00%2100.00%

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

PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso43100.00%4100.00%
Total43100.00%4100.00%


int __nft_release_basechain(struct nft_ctx *ctx) { struct nft_rule *rule, *nr; BUG_ON(!(ctx->chain->flags & NFT_BASE_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

PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso116100.00%2100.00%
Total116100.00%2100.00%

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

PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso265100.00%3100.00%
Total265100.00%3100.00%

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

PersonTokensPropCommitsCommitProp
Patrick McHardy9895.15%150.00%
Pablo Neira Ayuso54.85%150.00%
Total103100.00%2100.00%


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

PersonTokensPropCommitsCommitProp
Patrick McHardy2371.88%133.33%
Pablo Neira Ayuso928.12%266.67%
Total32100.00%3100.00%

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

PersonTokensPropCommitsCommitProp
Pablo Neira Ayuso1178340.51%9752.43%
Patrick McHardy1104237.96%4926.49%
Arturo Borrero Gonzalez568819.56%73.78%
Carlos Falgueras García1090.37%10.54%
Eric Leblond1010.35%10.54%
Gao Feng910.31%21.08%
Liping Zhang900.31%73.78%
Laura Garcia Liebana540.19%10.54%
Florian Westphal220.08%31.62%
Johannes Berg180.06%10.54%
Nicolas Dichtel160.06%10.54%
Anders K. Pedersen120.04%10.54%
Phil Turnbull120.04%10.54%
Eric Dumazet80.03%10.54%
Mirek Kratochvil70.02%10.54%
Daniel Borkmann70.02%10.54%
Julia Lawall60.02%10.54%
Tomasz Bursztyka40.01%21.08%
Sabrina Dubroca40.01%10.54%
Eric W. Biedermann30.01%10.54%
Thomas Graf30.01%10.54%
Michal Nazarewicz20.01%10.54%
Dan Carpenter10.00%10.54%
Xin Long10.00%10.54%
Stephen Hemminger10.00%10.54%
Total29085100.00%185100.00%
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