1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 296518518SPatrick McHardy #ifndef _NET_NF_TABLES_H 396518518SPatrick McHardy #define _NET_NF_TABLES_H 496518518SPatrick McHardy 5a1b840adSAnder Juaristi #include <asm/unaligned.h> 696518518SPatrick McHardy #include <linux/list.h> 796518518SPatrick McHardy #include <linux/netfilter.h> 867a8fc27SPatrick McHardy #include <linux/netfilter/nfnetlink.h> 90ca743a5SPablo Neira Ayuso #include <linux/netfilter/x_tables.h> 1096518518SPatrick McHardy #include <linux/netfilter/nf_tables.h> 11ce355e20SEric Dumazet #include <linux/u64_stats_sync.h> 121b2470e5SFlorian Westphal #include <linux/rhashtable.h> 133b49e2e9SPablo Neira Ayuso #include <net/netfilter/nf_flow_table.h> 1496518518SPatrick McHardy #include <net/netlink.h> 1514bfb13fSPablo Neira Ayuso #include <net/flow_offload.h> 16d59d2f82SPablo Neira Ayuso #include <net/netns/generic.h> 1796518518SPatrick McHardy 18d25e2e93SPablo Neira Ayuso #define NFT_MAX_HOOKS (NF_INET_INGRESS + 1) 19d25e2e93SPablo Neira Ayuso 20a4cb98f3SPaul Gortmaker struct module; 21a4cb98f3SPaul Gortmaker 2220a69341SPatrick McHardy #define NFT_JUMP_STACK_SIZE 16 2320a69341SPatrick McHardy 24b5bdc6f9SPablo Neira Ayuso enum { 25b5bdc6f9SPablo Neira Ayuso NFT_PKTINFO_L4PROTO = (1 << 0), 26c46b38dcSPablo Neira Ayuso NFT_PKTINFO_INNER = (1 << 1), 270e795b37SPablo Neira Ayuso NFT_PKTINFO_INNER_FULL = (1 << 2), 28b5bdc6f9SPablo Neira Ayuso }; 29b5bdc6f9SPablo Neira Ayuso 3096518518SPatrick McHardy struct nft_pktinfo { 3196518518SPatrick McHardy struct sk_buff *skb; 32897389deSFlorian Westphal const struct nf_hook_state *state; 33b5bdc6f9SPablo Neira Ayuso u8 flags; 344566bf27SPatrick McHardy u8 tprot; 35897389deSFlorian Westphal u16 fragoff; 36e7a1caa6SFlorian Westphal u16 thoff; 37e7a1caa6SFlorian Westphal u16 inneroff; 3896518518SPatrick McHardy }; 3996518518SPatrick McHardy 4085554eb9SFlorian Westphal static inline struct sock *nft_sk(const struct nft_pktinfo *pkt) 4185554eb9SFlorian Westphal { 42897389deSFlorian Westphal return pkt->state->sk; 4385554eb9SFlorian Westphal } 4485554eb9SFlorian Westphal 452d7b4aceSFlorian Westphal static inline unsigned int nft_thoff(const struct nft_pktinfo *pkt) 462d7b4aceSFlorian Westphal { 47897389deSFlorian Westphal return pkt->thoff; 482d7b4aceSFlorian Westphal } 492d7b4aceSFlorian Westphal 500e5a1c7eSPablo Neira Ayuso static inline struct net *nft_net(const struct nft_pktinfo *pkt) 510e5a1c7eSPablo Neira Ayuso { 52897389deSFlorian Westphal return pkt->state->net; 530e5a1c7eSPablo Neira Ayuso } 540e5a1c7eSPablo Neira Ayuso 550e5a1c7eSPablo Neira Ayuso static inline unsigned int nft_hook(const struct nft_pktinfo *pkt) 560e5a1c7eSPablo Neira Ayuso { 57897389deSFlorian Westphal return pkt->state->hook; 580e5a1c7eSPablo Neira Ayuso } 590e5a1c7eSPablo Neira Ayuso 600e5a1c7eSPablo Neira Ayuso static inline u8 nft_pf(const struct nft_pktinfo *pkt) 610e5a1c7eSPablo Neira Ayuso { 62897389deSFlorian Westphal return pkt->state->pf; 630e5a1c7eSPablo Neira Ayuso } 640e5a1c7eSPablo Neira Ayuso 650e5a1c7eSPablo Neira Ayuso static inline const struct net_device *nft_in(const struct nft_pktinfo *pkt) 660e5a1c7eSPablo Neira Ayuso { 67897389deSFlorian Westphal return pkt->state->in; 680e5a1c7eSPablo Neira Ayuso } 690e5a1c7eSPablo Neira Ayuso 700e5a1c7eSPablo Neira Ayuso static inline const struct net_device *nft_out(const struct nft_pktinfo *pkt) 710e5a1c7eSPablo Neira Ayuso { 72897389deSFlorian Westphal return pkt->state->out; 730e5a1c7eSPablo Neira Ayuso } 740e5a1c7eSPablo Neira Ayuso 750ca743a5SPablo Neira Ayuso static inline void nft_set_pktinfo(struct nft_pktinfo *pkt, 760ca743a5SPablo Neira Ayuso struct sk_buff *skb, 77073bfd56SDavid S. Miller const struct nf_hook_state *state) 780ca743a5SPablo Neira Ayuso { 790ca743a5SPablo Neira Ayuso pkt->skb = skb; 80897389deSFlorian Westphal pkt->state = state; 810ca743a5SPablo Neira Ayuso } 820ca743a5SPablo Neira Ayuso 83f06ad944SFlorian Westphal static inline void nft_set_pktinfo_unspec(struct nft_pktinfo *pkt) 84beac5afaSPablo Neira Ayuso { 85b5bdc6f9SPablo Neira Ayuso pkt->flags = 0; 86beac5afaSPablo Neira Ayuso pkt->tprot = 0; 87897389deSFlorian Westphal pkt->thoff = 0; 88897389deSFlorian Westphal pkt->fragoff = 0; 89beac5afaSPablo Neira Ayuso } 90beac5afaSPablo Neira Ayuso 91a55e22e9SPatrick McHardy /** 92a55e22e9SPatrick McHardy * struct nft_verdict - nf_tables verdict 93a55e22e9SPatrick McHardy * 94a55e22e9SPatrick McHardy * @code: nf_tables/netfilter verdict code 95a55e22e9SPatrick McHardy * @chain: destination chain for NFT_JUMP/NFT_GOTO 96a55e22e9SPatrick McHardy */ 97a55e22e9SPatrick McHardy struct nft_verdict { 98a55e22e9SPatrick McHardy u32 code; 99a55e22e9SPatrick McHardy struct nft_chain *chain; 100a55e22e9SPatrick McHardy }; 101a55e22e9SPatrick McHardy 10296518518SPatrick McHardy struct nft_data { 10396518518SPatrick McHardy union { 10496518518SPatrick McHardy u32 data[4]; 1051ca2e170SPatrick McHardy struct nft_verdict verdict; 10696518518SPatrick McHardy }; 10796518518SPatrick McHardy } __attribute__((aligned(__alignof__(u64)))); 10896518518SPatrick McHardy 109642c8effSPablo Neira Ayuso #define NFT_REG32_NUM 20 110642c8effSPablo Neira Ayuso 111a55e22e9SPatrick McHardy /** 112a55e22e9SPatrick McHardy * struct nft_regs - nf_tables register set 113a55e22e9SPatrick McHardy * 114a55e22e9SPatrick McHardy * @data: data registers 115a55e22e9SPatrick McHardy * @verdict: verdict register 116a55e22e9SPatrick McHardy * 117a55e22e9SPatrick McHardy * The first four data registers alias to the verdict register. 118a55e22e9SPatrick McHardy */ 119a55e22e9SPatrick McHardy struct nft_regs { 120a55e22e9SPatrick McHardy union { 121642c8effSPablo Neira Ayuso u32 data[NFT_REG32_NUM]; 122a55e22e9SPatrick McHardy struct nft_verdict verdict; 123a55e22e9SPatrick McHardy }; 124a55e22e9SPatrick McHardy }; 125a55e22e9SPatrick McHardy 12612e4ecfaSPablo Neira Ayuso struct nft_regs_track { 12712e4ecfaSPablo Neira Ayuso struct { 12812e4ecfaSPablo Neira Ayuso const struct nft_expr *selector; 12912e4ecfaSPablo Neira Ayuso const struct nft_expr *bitwise; 13034cc9e52SPablo Neira Ayuso u8 num_reg; 13112e4ecfaSPablo Neira Ayuso } regs[NFT_REG32_NUM]; 13212e4ecfaSPablo Neira Ayuso 13312e4ecfaSPablo Neira Ayuso const struct nft_expr *cur; 13412e4ecfaSPablo Neira Ayuso const struct nft_expr *last; 13512e4ecfaSPablo Neira Ayuso }; 13612e4ecfaSPablo Neira Ayuso 137a1b840adSAnder Juaristi /* Store/load an u8, u16 or u64 integer to/from the u32 data register. 13810596608SLiping Zhang * 13910596608SLiping Zhang * Note, when using concatenations, register allocation happens at 32-bit 14010596608SLiping Zhang * level. So for store instruction, pad the rest part with zero to avoid 14110596608SLiping Zhang * garbage values. 14210596608SLiping Zhang */ 14310596608SLiping Zhang 14410596608SLiping Zhang static inline void nft_reg_store8(u32 *dreg, u8 val) 14510596608SLiping Zhang { 14610596608SLiping Zhang *dreg = 0; 14710596608SLiping Zhang *(u8 *)dreg = val; 14810596608SLiping Zhang } 14910596608SLiping Zhang 1507cd9a58dSPablo Neira Ayuso static inline u8 nft_reg_load8(const u32 *sreg) 151a1b840adSAnder Juaristi { 152a1b840adSAnder Juaristi return *(u8 *)sreg; 153a1b840adSAnder Juaristi } 154a1b840adSAnder Juaristi 155a1b840adSAnder Juaristi static inline void nft_reg_store16(u32 *dreg, u16 val) 156a1b840adSAnder Juaristi { 157a1b840adSAnder Juaristi *dreg = 0; 158a1b840adSAnder Juaristi *(u16 *)dreg = val; 159a1b840adSAnder Juaristi } 160a1b840adSAnder Juaristi 1617278b3c1SFlorian Westphal static inline void nft_reg_store_be16(u32 *dreg, __be16 val) 1627278b3c1SFlorian Westphal { 1637278b3c1SFlorian Westphal nft_reg_store16(dreg, (__force __u16)val); 1647278b3c1SFlorian Westphal } 1657278b3c1SFlorian Westphal 1667cd9a58dSPablo Neira Ayuso static inline u16 nft_reg_load16(const u32 *sreg) 16710596608SLiping Zhang { 16810596608SLiping Zhang return *(u16 *)sreg; 16910596608SLiping Zhang } 17010596608SLiping Zhang 1717278b3c1SFlorian Westphal static inline __be16 nft_reg_load_be16(const u32 *sreg) 1727278b3c1SFlorian Westphal { 1737278b3c1SFlorian Westphal return (__force __be16)nft_reg_load16(sreg); 1747278b3c1SFlorian Westphal } 1757278b3c1SFlorian Westphal 1767278b3c1SFlorian Westphal static inline __be32 nft_reg_load_be32(const u32 *sreg) 1777278b3c1SFlorian Westphal { 1787278b3c1SFlorian Westphal return *(__force __be32 *)sreg; 1797278b3c1SFlorian Westphal } 1807278b3c1SFlorian Westphal 181a1b840adSAnder Juaristi static inline void nft_reg_store64(u32 *dreg, u64 val) 18210596608SLiping Zhang { 183a1b840adSAnder Juaristi put_unaligned(val, (u64 *)dreg); 184a1b840adSAnder Juaristi } 185a1b840adSAnder Juaristi 1867cd9a58dSPablo Neira Ayuso static inline u64 nft_reg_load64(const u32 *sreg) 187a1b840adSAnder Juaristi { 188a1b840adSAnder Juaristi return get_unaligned((u64 *)sreg); 18910596608SLiping Zhang } 19010596608SLiping Zhang 19149499c3eSPatrick McHardy static inline void nft_data_copy(u32 *dst, const struct nft_data *src, 19249499c3eSPatrick McHardy unsigned int len) 19396518518SPatrick McHardy { 1941e105e6aSFlorian Westphal if (len % NFT_REG32_SIZE) 1951e105e6aSFlorian Westphal dst[len / NFT_REG32_SIZE] = 0; 19649499c3eSPatrick McHardy memcpy(dst, src, len); 19796518518SPatrick McHardy } 19896518518SPatrick McHardy 19996518518SPatrick McHardy /** 20020a69341SPatrick McHardy * struct nft_ctx - nf_tables rule/set context 20196518518SPatrick McHardy * 20299633ab2SPablo Neira Ayuso * @net: net namespace 20396518518SPatrick McHardy * @table: the table the chain is contained in 20496518518SPatrick McHardy * @chain: the chain the rule is contained in 2050ca743a5SPablo Neira Ayuso * @nla: netlink attributes 206128ad332SPablo Neira Ayuso * @portid: netlink portID of the original message 207128ad332SPablo Neira Ayuso * @seq: netlink sequence number 20836596dadSPablo Neira Ayuso * @family: protocol family 20926b2f552STaehee Yoo * @level: depth of the chains 210128ad332SPablo Neira Ayuso * @report: notify via unicast netlink message 21196518518SPatrick McHardy */ 21296518518SPatrick McHardy struct nft_ctx { 21399633ab2SPablo Neira Ayuso struct net *net; 2147c95f6d8SPablo Neira Ayuso struct nft_table *table; 2157c95f6d8SPablo Neira Ayuso struct nft_chain *chain; 2160ca743a5SPablo Neira Ayuso const struct nlattr * const *nla; 217128ad332SPablo Neira Ayuso u32 portid; 218128ad332SPablo Neira Ayuso u32 seq; 219c9626a2cSPablo Neira Ayuso u16 flags; 22036596dadSPablo Neira Ayuso u8 family; 22126b2f552STaehee Yoo u8 level; 222128ad332SPablo Neira Ayuso bool report; 22396518518SPatrick McHardy }; 22496518518SPatrick McHardy 225f323ef3aSPablo Neira Ayuso enum nft_data_desc_flags { 226f323ef3aSPablo Neira Ayuso NFT_DATA_DESC_SETELEM = (1 << 0), 227f323ef3aSPablo Neira Ayuso }; 228f323ef3aSPablo Neira Ayuso 22996518518SPatrick McHardy struct nft_data_desc { 23096518518SPatrick McHardy enum nft_data_types type; 231341b6941SPablo Neira Ayuso unsigned int size; 23296518518SPatrick McHardy unsigned int len; 233f323ef3aSPablo Neira Ayuso unsigned int flags; 23496518518SPatrick McHardy }; 23596518518SPatrick McHardy 236341b6941SPablo Neira Ayuso int nft_data_init(const struct nft_ctx *ctx, struct nft_data *data, 23796518518SPatrick McHardy struct nft_data_desc *desc, const struct nlattr *nla); 238bb7b40aeSPablo Neira Ayuso void nft_data_hold(const struct nft_data *data, enum nft_data_types type); 23959105446SPablo Neira Ayuso void nft_data_release(const struct nft_data *data, enum nft_data_types type); 2405eccdfaaSJoe Perches int nft_data_dump(struct sk_buff *skb, int attr, const struct nft_data *data, 24196518518SPatrick McHardy enum nft_data_types type, unsigned int len); 24296518518SPatrick McHardy 24396518518SPatrick McHardy static inline enum nft_data_types nft_dreg_to_type(enum nft_registers reg) 24496518518SPatrick McHardy { 24596518518SPatrick McHardy return reg == NFT_REG_VERDICT ? NFT_DATA_VERDICT : NFT_DATA_VALUE; 24696518518SPatrick McHardy } 24796518518SPatrick McHardy 24820a69341SPatrick McHardy static inline enum nft_registers nft_type_to_reg(enum nft_data_types type) 24920a69341SPatrick McHardy { 250bf798657SPablo Neira Ayuso return type == NFT_DATA_VERDICT ? NFT_REG_VERDICT : NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE; 25120a69341SPatrick McHardy } 25220a69341SPatrick McHardy 253f1d505bbSJohn W. Linville int nft_parse_u32_check(const struct nlattr *attr, int max, u32 *dest); 254b1c96ed3SPatrick McHardy int nft_dump_register(struct sk_buff *skb, unsigned int attr, unsigned int reg); 255b1c96ed3SPatrick McHardy 2564f16d25cSPablo Neira Ayuso int nft_parse_register_load(const struct nlattr *attr, u8 *sreg, u32 len); 257345023b0SPablo Neira Ayuso int nft_parse_register_store(const struct nft_ctx *ctx, 258345023b0SPablo Neira Ayuso const struct nlattr *attr, u8 *dreg, 25996518518SPatrick McHardy const struct nft_data *data, 26045d9bcdaSPatrick McHardy enum nft_data_types type, unsigned int len); 26196518518SPatrick McHardy 26286f1ec32SPatrick McHardy /** 26386f1ec32SPatrick McHardy * struct nft_userdata - user defined data associated with an object 26486f1ec32SPatrick McHardy * 26586f1ec32SPatrick McHardy * @len: length of the data 26686f1ec32SPatrick McHardy * @data: content 26786f1ec32SPatrick McHardy * 26886f1ec32SPatrick McHardy * The presence of user data is indicated in an object specific fashion, 26986f1ec32SPatrick McHardy * so a length of zero can't occur and the value "len" indicates data 27086f1ec32SPatrick McHardy * of length len + 1. 27186f1ec32SPatrick McHardy */ 27286f1ec32SPatrick McHardy struct nft_userdata { 27386f1ec32SPatrick McHardy u8 len; 2746daf1414SGustavo A. R. Silva unsigned char data[]; 27586f1ec32SPatrick McHardy }; 27686f1ec32SPatrick McHardy 27796518518SPatrick McHardy /** 27820a69341SPatrick McHardy * struct nft_set_elem - generic representation of set elements 27920a69341SPatrick McHardy * 28020a69341SPatrick McHardy * @key: element key 2817b225d0bSPablo Neira Ayuso * @key_end: closing element key 282fe2811ebSPatrick McHardy * @priv: element private data and extensions 28320a69341SPatrick McHardy */ 28420a69341SPatrick McHardy struct nft_set_elem { 2857d740264SPatrick McHardy union { 2867d740264SPatrick McHardy u32 buf[NFT_DATA_VALUE_MAXLEN / sizeof(u32)]; 2877d740264SPatrick McHardy struct nft_data val; 2887d740264SPatrick McHardy } key; 2897b225d0bSPablo Neira Ayuso union { 2907b225d0bSPablo Neira Ayuso u32 buf[NFT_DATA_VALUE_MAXLEN / sizeof(u32)]; 2917b225d0bSPablo Neira Ayuso struct nft_data val; 2927b225d0bSPablo Neira Ayuso } key_end; 293fdb9c405SPablo Neira Ayuso union { 294fdb9c405SPablo Neira Ayuso u32 buf[NFT_DATA_VALUE_MAXLEN / sizeof(u32)]; 295fdb9c405SPablo Neira Ayuso struct nft_data val; 296fdb9c405SPablo Neira Ayuso } data; 297fe2811ebSPatrick McHardy void *priv; 29820a69341SPatrick McHardy }; 29920a69341SPatrick McHardy 30020a69341SPatrick McHardy struct nft_set; 30120a69341SPatrick McHardy struct nft_set_iter { 3028588ac09SPablo Neira Ayuso u8 genmask; 30320a69341SPatrick McHardy unsigned int count; 30420a69341SPatrick McHardy unsigned int skip; 30520a69341SPatrick McHardy int err; 30620a69341SPatrick McHardy int (*fn)(const struct nft_ctx *ctx, 307de70185dSPablo Neira Ayuso struct nft_set *set, 30820a69341SPatrick McHardy const struct nft_set_iter *iter, 309de70185dSPablo Neira Ayuso struct nft_set_elem *elem); 31020a69341SPatrick McHardy }; 31120a69341SPatrick McHardy 31220a69341SPatrick McHardy /** 313c50b960cSPatrick McHardy * struct nft_set_desc - description of set elements 314c50b960cSPatrick McHardy * 315bed4a63eSPablo Neira Ayuso * @ktype: key type 316c50b960cSPatrick McHardy * @klen: key length 317bed4a63eSPablo Neira Ayuso * @dtype: data type 318c50b960cSPatrick McHardy * @dlen: data length 319bed4a63eSPablo Neira Ayuso * @objtype: object type 320bed4a63eSPablo Neira Ayuso * @flags: flags 321c50b960cSPatrick McHardy * @size: number of set elements 322bed4a63eSPablo Neira Ayuso * @policy: set policy 323bed4a63eSPablo Neira Ayuso * @gc_int: garbage collector interval 324f3a2181eSStefano Brivio * @field_len: length of each field in concatenation, bytes 325f3a2181eSStefano Brivio * @field_count: number of concatenated fields in element 326d56aab26SPablo Neira Ayuso * @expr: set must support for expressions 327c50b960cSPatrick McHardy */ 328c50b960cSPatrick McHardy struct nft_set_desc { 329bed4a63eSPablo Neira Ayuso u32 ktype; 330c50b960cSPatrick McHardy unsigned int klen; 331bed4a63eSPablo Neira Ayuso u32 dtype; 332c50b960cSPatrick McHardy unsigned int dlen; 333bed4a63eSPablo Neira Ayuso u32 objtype; 334c50b960cSPatrick McHardy unsigned int size; 335bed4a63eSPablo Neira Ayuso u32 policy; 336bed4a63eSPablo Neira Ayuso u32 gc_int; 337bed4a63eSPablo Neira Ayuso u64 timeout; 338f3a2181eSStefano Brivio u8 field_len[NFT_REG32_COUNT]; 339f3a2181eSStefano Brivio u8 field_count; 340d56aab26SPablo Neira Ayuso bool expr; 341c50b960cSPatrick McHardy }; 342c50b960cSPatrick McHardy 343c50b960cSPatrick McHardy /** 344c50b960cSPatrick McHardy * enum nft_set_class - performance class 345c50b960cSPatrick McHardy * 346c50b960cSPatrick McHardy * @NFT_LOOKUP_O_1: constant, O(1) 347c50b960cSPatrick McHardy * @NFT_LOOKUP_O_LOG_N: logarithmic, O(log N) 348c50b960cSPatrick McHardy * @NFT_LOOKUP_O_N: linear, O(N) 349c50b960cSPatrick McHardy */ 350c50b960cSPatrick McHardy enum nft_set_class { 351c50b960cSPatrick McHardy NFT_SET_CLASS_O_1, 352c50b960cSPatrick McHardy NFT_SET_CLASS_O_LOG_N, 353c50b960cSPatrick McHardy NFT_SET_CLASS_O_N, 354c50b960cSPatrick McHardy }; 355c50b960cSPatrick McHardy 356c50b960cSPatrick McHardy /** 357c50b960cSPatrick McHardy * struct nft_set_estimate - estimation of memory and performance 358c50b960cSPatrick McHardy * characteristics 359c50b960cSPatrick McHardy * 360c50b960cSPatrick McHardy * @size: required memory 36155af753cSPablo Neira Ayuso * @lookup: lookup performance class 3620b5a7874SPablo Neira Ayuso * @space: memory class 363c50b960cSPatrick McHardy */ 364c50b960cSPatrick McHardy struct nft_set_estimate { 3654ef360ddSTaehee Yoo u64 size; 36655af753cSPablo Neira Ayuso enum nft_set_class lookup; 3670b5a7874SPablo Neira Ayuso enum nft_set_class space; 368c50b960cSPatrick McHardy }; 369c50b960cSPatrick McHardy 37092b211a2SPablo Neira Ayuso #define NFT_EXPR_MAXATTR 16 37192b211a2SPablo Neira Ayuso #define NFT_EXPR_SIZE(size) (sizeof(struct nft_expr) + \ 37292b211a2SPablo Neira Ayuso ALIGN(size, __alignof__(struct nft_expr))) 37392b211a2SPablo Neira Ayuso 37492b211a2SPablo Neira Ayuso /** 37592b211a2SPablo Neira Ayuso * struct nft_expr - nf_tables expression 37692b211a2SPablo Neira Ayuso * 37792b211a2SPablo Neira Ayuso * @ops: expression ops 37892b211a2SPablo Neira Ayuso * @data: expression private data 37992b211a2SPablo Neira Ayuso */ 38092b211a2SPablo Neira Ayuso struct nft_expr { 38192b211a2SPablo Neira Ayuso const struct nft_expr_ops *ops; 38292b211a2SPablo Neira Ayuso unsigned char data[] 38392b211a2SPablo Neira Ayuso __attribute__((aligned(__alignof__(u64)))); 38492b211a2SPablo Neira Ayuso }; 38592b211a2SPablo Neira Ayuso 38692b211a2SPablo Neira Ayuso static inline void *nft_expr_priv(const struct nft_expr *expr) 38792b211a2SPablo Neira Ayuso { 38892b211a2SPablo Neira Ayuso return (void *)expr->data; 38992b211a2SPablo Neira Ayuso } 39092b211a2SPablo Neira Ayuso 3913a07327dSPablo Neira Ayuso struct nft_expr_info; 3923a07327dSPablo Neira Ayuso 3933a07327dSPablo Neira Ayuso int nft_expr_inner_parse(const struct nft_ctx *ctx, const struct nlattr *nla, 3943a07327dSPablo Neira Ayuso struct nft_expr_info *info); 39592b211a2SPablo Neira Ayuso int nft_expr_clone(struct nft_expr *dst, struct nft_expr *src); 39692b211a2SPablo Neira Ayuso void nft_expr_destroy(const struct nft_ctx *ctx, struct nft_expr *expr); 39792b211a2SPablo Neira Ayuso int nft_expr_dump(struct sk_buff *skb, unsigned int attr, 3988daa8fdeSPhil Sutter const struct nft_expr *expr, bool reset); 399be5650f8SPablo Neira Ayuso bool nft_expr_reduce_bitwise(struct nft_regs_track *track, 400be5650f8SPablo Neira Ayuso const struct nft_expr *expr); 40192b211a2SPablo Neira Ayuso 402b2832dd6SPatrick McHardy struct nft_set_ext; 403b2832dd6SPatrick McHardy 404c50b960cSPatrick McHardy /** 40520a69341SPatrick McHardy * struct nft_set_ops - nf_tables set operations 40620a69341SPatrick McHardy * 40720a69341SPatrick McHardy * @lookup: look up an element within the set 408d0a8d877SAnder Juaristi * @update: update an element if exists, add it if doesn't exist 409d0a8d877SAnder Juaristi * @delete: delete an element 41020a69341SPatrick McHardy * @insert: insert new element into set 411cc02e457SPatrick McHardy * @activate: activate new element in the next generation 4128411b644SPablo Neira Ayuso * @deactivate: lookup for element and deactivate it in the next generation 4131ba1c414SPablo Neira Ayuso * @flush: deactivate element in the next generation 41420a69341SPatrick McHardy * @remove: remove element from set 415d0a8d877SAnder Juaristi * @walk: iterate over all set elements 416ba0e4d99SPablo Neira Ayuso * @get: get set elements 41720a69341SPatrick McHardy * @privsize: function to return size of set private data 41820a69341SPatrick McHardy * @init: initialize private data of new set instance 41920a69341SPatrick McHardy * @destroy: destroy private data of set instance 420fe2811ebSPatrick McHardy * @elemsize: element private size 421d0a8d877SAnder Juaristi * 422d0a8d877SAnder Juaristi * Operations lookup, update and delete have simpler interfaces, are faster 423d0a8d877SAnder Juaristi * and currently only used in the packet path. All the rest are slower, 424d0a8d877SAnder Juaristi * control plane functions. 42520a69341SPatrick McHardy */ 42620a69341SPatrick McHardy struct nft_set_ops { 42742a55769SPablo Neira Ayuso bool (*lookup)(const struct net *net, 42842a55769SPablo Neira Ayuso const struct nft_set *set, 4298cd8937aSPatrick McHardy const u32 *key, 430b2832dd6SPatrick McHardy const struct nft_set_ext **ext); 43122fe54d5SPatrick McHardy bool (*update)(struct nft_set *set, 4328cd8937aSPatrick McHardy const u32 *key, 43322fe54d5SPatrick McHardy void *(*new)(struct nft_set *, 43422fe54d5SPatrick McHardy const struct nft_expr *, 435a55e22e9SPatrick McHardy struct nft_regs *), 43622fe54d5SPatrick McHardy const struct nft_expr *expr, 437a55e22e9SPatrick McHardy struct nft_regs *regs, 43822fe54d5SPatrick McHardy const struct nft_set_ext **ext); 439d0a8d877SAnder Juaristi bool (*delete)(const struct nft_set *set, 440d0a8d877SAnder Juaristi const u32 *key); 44122fe54d5SPatrick McHardy 44242a55769SPablo Neira Ayuso int (*insert)(const struct net *net, 44342a55769SPablo Neira Ayuso const struct nft_set *set, 444c016c7e4SPablo Neira Ayuso const struct nft_set_elem *elem, 445c016c7e4SPablo Neira Ayuso struct nft_set_ext **ext); 44642a55769SPablo Neira Ayuso void (*activate)(const struct net *net, 44742a55769SPablo Neira Ayuso const struct nft_set *set, 448cc02e457SPatrick McHardy const struct nft_set_elem *elem); 44942a55769SPablo Neira Ayuso void * (*deactivate)(const struct net *net, 45042a55769SPablo Neira Ayuso const struct nft_set *set, 451cc02e457SPatrick McHardy const struct nft_set_elem *elem); 4521ba1c414SPablo Neira Ayuso bool (*flush)(const struct net *net, 4538411b644SPablo Neira Ayuso const struct nft_set *set, 4548411b644SPablo Neira Ayuso void *priv); 4555cb82a38SPablo Neira Ayuso void (*remove)(const struct net *net, 4565cb82a38SPablo Neira Ayuso const struct nft_set *set, 45720a69341SPatrick McHardy const struct nft_set_elem *elem); 45820a69341SPatrick McHardy void (*walk)(const struct nft_ctx *ctx, 459de70185dSPablo Neira Ayuso struct nft_set *set, 46020a69341SPatrick McHardy struct nft_set_iter *iter); 461ba0e4d99SPablo Neira Ayuso void * (*get)(const struct net *net, 462ba0e4d99SPablo Neira Ayuso const struct nft_set *set, 463ba0e4d99SPablo Neira Ayuso const struct nft_set_elem *elem, 464ba0e4d99SPablo Neira Ayuso unsigned int flags); 465212ed75dSPablo Neira Ayuso void (*commit)(const struct nft_set *set); 466212ed75dSPablo Neira Ayuso void (*abort)(const struct nft_set *set); 4674ef360ddSTaehee Yoo u64 (*privsize)(const struct nlattr * const nla[], 468347b408dSPablo Neira Ayuso const struct nft_set_desc *desc); 469c50b960cSPatrick McHardy bool (*estimate)(const struct nft_set_desc *desc, 470c50b960cSPatrick McHardy u32 features, 471c50b960cSPatrick McHardy struct nft_set_estimate *est); 47220a69341SPatrick McHardy int (*init)(const struct nft_set *set, 473c50b960cSPatrick McHardy const struct nft_set_desc *desc, 47420a69341SPatrick McHardy const struct nlattr * const nla[]); 47520a69341SPatrick McHardy void (*destroy)(const struct nft_set *set); 47679b174adSPablo Neira Ayuso void (*gc_init)(const struct nft_set *set); 47720a69341SPatrick McHardy 478fe2811ebSPatrick McHardy unsigned int elemsize; 47920a69341SPatrick McHardy }; 48020a69341SPatrick McHardy 48171cc0873SPhil Sutter /** 48271cc0873SPhil Sutter * struct nft_set_type - nf_tables set type 48371cc0873SPhil Sutter * 48471cc0873SPhil Sutter * @ops: set ops for this type 48571cc0873SPhil Sutter * @features: features supported by the implementation 48671cc0873SPhil Sutter */ 48771cc0873SPhil Sutter struct nft_set_type { 48871cc0873SPhil Sutter const struct nft_set_ops ops; 48971cc0873SPhil Sutter u32 features; 49071cc0873SPhil Sutter }; 49171cc0873SPhil Sutter #define to_set_type(o) container_of(o, struct nft_set_type, ops) 49271cc0873SPhil Sutter 493563125a7SPablo Neira Ayuso struct nft_set_elem_expr { 494563125a7SPablo Neira Ayuso u8 size; 495563125a7SPablo Neira Ayuso unsigned char data[] 496563125a7SPablo Neira Ayuso __attribute__((aligned(__alignof__(struct nft_expr)))); 497563125a7SPablo Neira Ayuso }; 498563125a7SPablo Neira Ayuso 499563125a7SPablo Neira Ayuso #define nft_setelem_expr_at(__elem_expr, __offset) \ 500563125a7SPablo Neira Ayuso ((struct nft_expr *)&__elem_expr->data[__offset]) 501563125a7SPablo Neira Ayuso 502563125a7SPablo Neira Ayuso #define nft_setelem_expr_foreach(__expr, __elem_expr, __size) \ 503563125a7SPablo Neira Ayuso for (__expr = nft_setelem_expr_at(__elem_expr, 0), __size = 0; \ 504563125a7SPablo Neira Ayuso __size < (__elem_expr)->size; \ 505563125a7SPablo Neira Ayuso __size += (__expr)->ops->size, __expr = ((void *)(__expr)) + (__expr)->ops->size) 506563125a7SPablo Neira Ayuso 5078cfd9b0fSPablo Neira Ayuso #define NFT_SET_EXPR_MAX 2 5088cfd9b0fSPablo Neira Ayuso 50920a69341SPatrick McHardy /** 51020a69341SPatrick McHardy * struct nft_set - nf_tables set instance 51120a69341SPatrick McHardy * 51220a69341SPatrick McHardy * @list: table set list node 51320a69341SPatrick McHardy * @bindings: list of set bindings 5143453c927SPablo Neira Ayuso * @table: table this set belongs to 5153453c927SPablo Neira Ayuso * @net: netnamespace this set belongs to 51620a69341SPatrick McHardy * @name: name of the set 5173ecbfd65SHarsha Sharma * @handle: unique handle of the set 51820a69341SPatrick McHardy * @ktype: key type (numeric type defined by userspace, not used in the kernel) 51920a69341SPatrick McHardy * @dtype: data type (verdict or numeric type defined by userspace) 5208aeff920SPablo Neira Ayuso * @objtype: object type (see NFT_OBJECT_* definitions) 521c50b960cSPatrick McHardy * @size: maximum set size 522f3a2181eSStefano Brivio * @field_len: length of each field in concatenation, bytes 523f3a2181eSStefano Brivio * @field_count: number of concatenated fields in element 524273fe3f1SPablo Neira Ayuso * @use: number of rules references to this set 525c50b960cSPatrick McHardy * @nelems: number of elements 5263dd0673aSPatrick McHardy * @ndeact: number of deactivated elements queued for removal 527d3e2a111SAnders K. Pedersen * @timeout: default timeout value in jiffies 528761da293SPatrick McHardy * @gc_int: garbage collection interval in msecs 5299363dc4bSArturo Borrero * @policy: set parameterization (see enum nft_set_policies) 530e6d8ecacSCarlos Falgueras García * @udlen: user data length 531e6d8ecacSCarlos Falgueras García * @udata: user data 53265038428SPablo Neira Ayuso * @expr: stateful expression 53320a69341SPatrick McHardy * @ops: set ops 53420a69341SPatrick McHardy * @flags: set flags 53537a9cc52SPablo Neira Ayuso * @genmask: generation mask 53620a69341SPatrick McHardy * @klen: key length 53720a69341SPatrick McHardy * @dlen: data length 53820a69341SPatrick McHardy * @data: private set data 53920a69341SPatrick McHardy */ 54020a69341SPatrick McHardy struct nft_set { 54120a69341SPatrick McHardy struct list_head list; 54220a69341SPatrick McHardy struct list_head bindings; 5433453c927SPablo Neira Ayuso struct nft_table *table; 5443453c927SPablo Neira Ayuso possible_net_t net; 54538745490SPhil Sutter char *name; 5463ecbfd65SHarsha Sharma u64 handle; 54720a69341SPatrick McHardy u32 ktype; 54820a69341SPatrick McHardy u32 dtype; 5498aeff920SPablo Neira Ayuso u32 objtype; 550c50b960cSPatrick McHardy u32 size; 551f3a2181eSStefano Brivio u8 field_len[NFT_REG32_COUNT]; 552f3a2181eSStefano Brivio u8 field_count; 553273fe3f1SPablo Neira Ayuso u32 use; 5543dd0673aSPatrick McHardy atomic_t nelems; 5553dd0673aSPatrick McHardy u32 ndeact; 556761da293SPatrick McHardy u64 timeout; 557761da293SPatrick McHardy u32 gc_int; 5589363dc4bSArturo Borrero u16 policy; 559e6d8ecacSCarlos Falgueras García u16 udlen; 560e6d8ecacSCarlos Falgueras García unsigned char *udata; 561212ed75dSPablo Neira Ayuso struct list_head pending_update; 56220a69341SPatrick McHardy /* runtime data below here */ 56320a69341SPatrick McHardy const struct nft_set_ops *ops ____cacheline_aligned; 5646a0a8d10SPablo Neira Ayuso u16 flags:14, 56537a9cc52SPablo Neira Ayuso genmask:2; 56620a69341SPatrick McHardy u8 klen; 56720a69341SPatrick McHardy u8 dlen; 5688cfd9b0fSPablo Neira Ayuso u8 num_exprs; 5698cfd9b0fSPablo Neira Ayuso struct nft_expr *exprs[NFT_SET_EXPR_MAX]; 570aaa31047SPablo Neira Ayuso struct list_head catchall_list; 57120a69341SPatrick McHardy unsigned char data[] 57220a69341SPatrick McHardy __attribute__((aligned(__alignof__(u64)))); 57320a69341SPatrick McHardy }; 57420a69341SPatrick McHardy 575408070d6SPablo Neira Ayuso static inline bool nft_set_is_anonymous(const struct nft_set *set) 576408070d6SPablo Neira Ayuso { 577408070d6SPablo Neira Ayuso return set->flags & NFT_SET_ANONYMOUS; 578408070d6SPablo Neira Ayuso } 579408070d6SPablo Neira Ayuso 58020a69341SPatrick McHardy static inline void *nft_set_priv(const struct nft_set *set) 58120a69341SPatrick McHardy { 58220a69341SPatrick McHardy return (void *)set->data; 58320a69341SPatrick McHardy } 58420a69341SPatrick McHardy 5859d098292SPatrick McHardy static inline struct nft_set *nft_set_container_of(const void *priv) 5869d098292SPatrick McHardy { 5879d098292SPatrick McHardy return (void *)priv - offsetof(struct nft_set, data); 5889d098292SPatrick McHardy } 5899d098292SPatrick McHardy 59010659cbaSPablo Neira Ayuso struct nft_set *nft_set_lookup_global(const struct net *net, 591c7a72e3fSPablo Neira Ayuso const struct nft_table *table, 592c7a72e3fSPablo Neira Ayuso const struct nlattr *nla_set_name, 593c7a72e3fSPablo Neira Ayuso const struct nlattr *nla_set_id, 594c7a72e3fSPablo Neira Ayuso u8 genmask); 59520a69341SPatrick McHardy 596aaa31047SPablo Neira Ayuso struct nft_set_ext *nft_set_catchall_lookup(const struct net *net, 597aaa31047SPablo Neira Ayuso const struct nft_set *set); 598aaa31047SPablo Neira Ayuso void *nft_set_catchall_gc(const struct nft_set *set); 599aaa31047SPablo Neira Ayuso 600761da293SPatrick McHardy static inline unsigned long nft_set_gc_interval(const struct nft_set *set) 601761da293SPatrick McHardy { 602123b9961SPablo Neira Ayuso u32 gc_int = READ_ONCE(set->gc_int); 603123b9961SPablo Neira Ayuso 604123b9961SPablo Neira Ayuso return gc_int ? msecs_to_jiffies(gc_int) : HZ; 605761da293SPatrick McHardy } 606761da293SPatrick McHardy 60720a69341SPatrick McHardy /** 60820a69341SPatrick McHardy * struct nft_set_binding - nf_tables set binding 60920a69341SPatrick McHardy * 61020a69341SPatrick McHardy * @list: set bindings list node 61120a69341SPatrick McHardy * @chain: chain containing the rule bound to the set 61211113e19SPatrick McHardy * @flags: set action flags 61320a69341SPatrick McHardy * 61420a69341SPatrick McHardy * A set binding contains all information necessary for validation 61520a69341SPatrick McHardy * of new elements added to a bound set. 61620a69341SPatrick McHardy */ 61720a69341SPatrick McHardy struct nft_set_binding { 61820a69341SPatrick McHardy struct list_head list; 61920a69341SPatrick McHardy const struct nft_chain *chain; 62011113e19SPatrick McHardy u32 flags; 62120a69341SPatrick McHardy }; 62220a69341SPatrick McHardy 623273fe3f1SPablo Neira Ayuso enum nft_trans_phase; 624c1592a89SPablo Neira Ayuso void nf_tables_activate_set(const struct nft_ctx *ctx, struct nft_set *set); 625273fe3f1SPablo Neira Ayuso void nf_tables_deactivate_set(const struct nft_ctx *ctx, struct nft_set *set, 626273fe3f1SPablo Neira Ayuso struct nft_set_binding *binding, 627273fe3f1SPablo Neira Ayuso enum nft_trans_phase phase); 6285eccdfaaSJoe Perches int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set, 62920a69341SPatrick McHardy struct nft_set_binding *binding); 630cd5125d8SFlorian Westphal void nf_tables_destroy_set(const struct nft_ctx *ctx, struct nft_set *set); 63120a69341SPatrick McHardy 6323ac4c07aSPatrick McHardy /** 6333ac4c07aSPatrick McHardy * enum nft_set_extensions - set extension type IDs 6343ac4c07aSPatrick McHardy * 6353ac4c07aSPatrick McHardy * @NFT_SET_EXT_KEY: element key 6367b225d0bSPablo Neira Ayuso * @NFT_SET_EXT_KEY_END: upper bound element key, for ranges 6373ac4c07aSPatrick McHardy * @NFT_SET_EXT_DATA: mapping data 6383ac4c07aSPatrick McHardy * @NFT_SET_EXT_FLAGS: element flags 639c3e1b005SPatrick McHardy * @NFT_SET_EXT_TIMEOUT: element timeout 640c3e1b005SPatrick McHardy * @NFT_SET_EXT_EXPIRATION: element expiration time 64168e942e8SPatrick McHardy * @NFT_SET_EXT_USERDATA: user data associated with the element 642563125a7SPablo Neira Ayuso * @NFT_SET_EXT_EXPRESSIONS: expressions assiciated with the element 6438aeff920SPablo Neira Ayuso * @NFT_SET_EXT_OBJREF: stateful object reference associated with element 6443ac4c07aSPatrick McHardy * @NFT_SET_EXT_NUM: number of extension types 6453ac4c07aSPatrick McHardy */ 6463ac4c07aSPatrick McHardy enum nft_set_extensions { 6473ac4c07aSPatrick McHardy NFT_SET_EXT_KEY, 6487b225d0bSPablo Neira Ayuso NFT_SET_EXT_KEY_END, 6493ac4c07aSPatrick McHardy NFT_SET_EXT_DATA, 6503ac4c07aSPatrick McHardy NFT_SET_EXT_FLAGS, 651c3e1b005SPatrick McHardy NFT_SET_EXT_TIMEOUT, 652c3e1b005SPatrick McHardy NFT_SET_EXT_EXPIRATION, 65368e942e8SPatrick McHardy NFT_SET_EXT_USERDATA, 654563125a7SPablo Neira Ayuso NFT_SET_EXT_EXPRESSIONS, 6558aeff920SPablo Neira Ayuso NFT_SET_EXT_OBJREF, 6563ac4c07aSPatrick McHardy NFT_SET_EXT_NUM 6573ac4c07aSPatrick McHardy }; 6583ac4c07aSPatrick McHardy 6593ac4c07aSPatrick McHardy /** 6603ac4c07aSPatrick McHardy * struct nft_set_ext_type - set extension type 6613ac4c07aSPatrick McHardy * 6623ac4c07aSPatrick McHardy * @len: fixed part length of the extension 6633ac4c07aSPatrick McHardy * @align: alignment requirements of the extension 6643ac4c07aSPatrick McHardy */ 6653ac4c07aSPatrick McHardy struct nft_set_ext_type { 6663ac4c07aSPatrick McHardy u8 len; 6673ac4c07aSPatrick McHardy u8 align; 6683ac4c07aSPatrick McHardy }; 6693ac4c07aSPatrick McHardy 6703ac4c07aSPatrick McHardy extern const struct nft_set_ext_type nft_set_ext_types[]; 6713ac4c07aSPatrick McHardy 6723ac4c07aSPatrick McHardy /** 6733ac4c07aSPatrick McHardy * struct nft_set_ext_tmpl - set extension template 6743ac4c07aSPatrick McHardy * 6753ac4c07aSPatrick McHardy * @len: length of extension area 6763ac4c07aSPatrick McHardy * @offset: offsets of individual extension types 6773ac4c07aSPatrick McHardy */ 6783ac4c07aSPatrick McHardy struct nft_set_ext_tmpl { 6793ac4c07aSPatrick McHardy u16 len; 6803ac4c07aSPatrick McHardy u8 offset[NFT_SET_EXT_NUM]; 68134aae2c2SPablo Neira Ayuso u8 ext_len[NFT_SET_EXT_NUM]; 6823ac4c07aSPatrick McHardy }; 6833ac4c07aSPatrick McHardy 6843ac4c07aSPatrick McHardy /** 6853ac4c07aSPatrick McHardy * struct nft_set_ext - set extensions 6863ac4c07aSPatrick McHardy * 687cc02e457SPatrick McHardy * @genmask: generation mask 6883ac4c07aSPatrick McHardy * @offset: offsets of individual extension types 6893ac4c07aSPatrick McHardy * @data: beginning of extension data 6903ac4c07aSPatrick McHardy */ 6913ac4c07aSPatrick McHardy struct nft_set_ext { 692cc02e457SPatrick McHardy u8 genmask; 6933ac4c07aSPatrick McHardy u8 offset[NFT_SET_EXT_NUM]; 6946daf1414SGustavo A. R. Silva char data[]; 6953ac4c07aSPatrick McHardy }; 6963ac4c07aSPatrick McHardy 6973ac4c07aSPatrick McHardy static inline void nft_set_ext_prepare(struct nft_set_ext_tmpl *tmpl) 6983ac4c07aSPatrick McHardy { 6993ac4c07aSPatrick McHardy memset(tmpl, 0, sizeof(*tmpl)); 7003ac4c07aSPatrick McHardy tmpl->len = sizeof(struct nft_set_ext); 7013ac4c07aSPatrick McHardy } 7023ac4c07aSPatrick McHardy 703c39ba4deSPablo Neira Ayuso static inline int nft_set_ext_add_length(struct nft_set_ext_tmpl *tmpl, u8 id, 7043ac4c07aSPatrick McHardy unsigned int len) 7053ac4c07aSPatrick McHardy { 7063ac4c07aSPatrick McHardy tmpl->len = ALIGN(tmpl->len, nft_set_ext_types[id].align); 707c39ba4deSPablo Neira Ayuso if (tmpl->len > U8_MAX) 708c39ba4deSPablo Neira Ayuso return -EINVAL; 709c39ba4deSPablo Neira Ayuso 7103ac4c07aSPatrick McHardy tmpl->offset[id] = tmpl->len; 71134aae2c2SPablo Neira Ayuso tmpl->ext_len[id] = nft_set_ext_types[id].len + len; 71234aae2c2SPablo Neira Ayuso tmpl->len += tmpl->ext_len[id]; 713c39ba4deSPablo Neira Ayuso 714c39ba4deSPablo Neira Ayuso return 0; 7153ac4c07aSPatrick McHardy } 7163ac4c07aSPatrick McHardy 717c39ba4deSPablo Neira Ayuso static inline int nft_set_ext_add(struct nft_set_ext_tmpl *tmpl, u8 id) 7183ac4c07aSPatrick McHardy { 719c39ba4deSPablo Neira Ayuso return nft_set_ext_add_length(tmpl, id, 0); 7203ac4c07aSPatrick McHardy } 7213ac4c07aSPatrick McHardy 7223ac4c07aSPatrick McHardy static inline void nft_set_ext_init(struct nft_set_ext *ext, 7233ac4c07aSPatrick McHardy const struct nft_set_ext_tmpl *tmpl) 7243ac4c07aSPatrick McHardy { 7253ac4c07aSPatrick McHardy memcpy(ext->offset, tmpl->offset, sizeof(ext->offset)); 7263ac4c07aSPatrick McHardy } 7273ac4c07aSPatrick McHardy 7283ac4c07aSPatrick McHardy static inline bool __nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) 7293ac4c07aSPatrick McHardy { 7303ac4c07aSPatrick McHardy return !!ext->offset[id]; 7313ac4c07aSPatrick McHardy } 7323ac4c07aSPatrick McHardy 7333ac4c07aSPatrick McHardy static inline bool nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) 7343ac4c07aSPatrick McHardy { 7353ac4c07aSPatrick McHardy return ext && __nft_set_ext_exists(ext, id); 7363ac4c07aSPatrick McHardy } 7373ac4c07aSPatrick McHardy 7383ac4c07aSPatrick McHardy static inline void *nft_set_ext(const struct nft_set_ext *ext, u8 id) 7393ac4c07aSPatrick McHardy { 7403ac4c07aSPatrick McHardy return (void *)ext + ext->offset[id]; 7413ac4c07aSPatrick McHardy } 7423ac4c07aSPatrick McHardy 7433ac4c07aSPatrick McHardy static inline struct nft_data *nft_set_ext_key(const struct nft_set_ext *ext) 7443ac4c07aSPatrick McHardy { 7453ac4c07aSPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_KEY); 7463ac4c07aSPatrick McHardy } 7473ac4c07aSPatrick McHardy 7487b225d0bSPablo Neira Ayuso static inline struct nft_data *nft_set_ext_key_end(const struct nft_set_ext *ext) 7497b225d0bSPablo Neira Ayuso { 7507b225d0bSPablo Neira Ayuso return nft_set_ext(ext, NFT_SET_EXT_KEY_END); 7517b225d0bSPablo Neira Ayuso } 7527b225d0bSPablo Neira Ayuso 7533ac4c07aSPatrick McHardy static inline struct nft_data *nft_set_ext_data(const struct nft_set_ext *ext) 7543ac4c07aSPatrick McHardy { 7553ac4c07aSPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_DATA); 7563ac4c07aSPatrick McHardy } 7573ac4c07aSPatrick McHardy 7583ac4c07aSPatrick McHardy static inline u8 *nft_set_ext_flags(const struct nft_set_ext *ext) 7593ac4c07aSPatrick McHardy { 7603ac4c07aSPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_FLAGS); 7613ac4c07aSPatrick McHardy } 762ef1f7df9SPatrick McHardy 763c3e1b005SPatrick McHardy static inline u64 *nft_set_ext_timeout(const struct nft_set_ext *ext) 764c3e1b005SPatrick McHardy { 765c3e1b005SPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_TIMEOUT); 766c3e1b005SPatrick McHardy } 767c3e1b005SPatrick McHardy 7688e1102d5SFlorian Westphal static inline u64 *nft_set_ext_expiration(const struct nft_set_ext *ext) 769c3e1b005SPatrick McHardy { 770c3e1b005SPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_EXPIRATION); 771c3e1b005SPatrick McHardy } 772c3e1b005SPatrick McHardy 77368e942e8SPatrick McHardy static inline struct nft_userdata *nft_set_ext_userdata(const struct nft_set_ext *ext) 77468e942e8SPatrick McHardy { 77568e942e8SPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_USERDATA); 77668e942e8SPatrick McHardy } 77768e942e8SPatrick McHardy 778563125a7SPablo Neira Ayuso static inline struct nft_set_elem_expr *nft_set_ext_expr(const struct nft_set_ext *ext) 779f25ad2e9SPatrick McHardy { 780563125a7SPablo Neira Ayuso return nft_set_ext(ext, NFT_SET_EXT_EXPRESSIONS); 781f25ad2e9SPatrick McHardy } 782f25ad2e9SPatrick McHardy 783c3e1b005SPatrick McHardy static inline bool nft_set_elem_expired(const struct nft_set_ext *ext) 784c3e1b005SPatrick McHardy { 785c3e1b005SPatrick McHardy return nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION) && 7868e1102d5SFlorian Westphal time_is_before_eq_jiffies64(*nft_set_ext_expiration(ext)); 787c3e1b005SPatrick McHardy } 788c3e1b005SPatrick McHardy 789fe2811ebSPatrick McHardy static inline struct nft_set_ext *nft_set_elem_ext(const struct nft_set *set, 790fe2811ebSPatrick McHardy void *elem) 791fe2811ebSPatrick McHardy { 792fe2811ebSPatrick McHardy return elem + set->ops->elemsize; 793fe2811ebSPatrick McHardy } 794fe2811ebSPatrick McHardy 7958aeff920SPablo Neira Ayuso static inline struct nft_object **nft_set_ext_obj(const struct nft_set_ext *ext) 7968aeff920SPablo Neira Ayuso { 7978aeff920SPablo Neira Ayuso return nft_set_ext(ext, NFT_SET_EXT_OBJREF); 7988aeff920SPablo Neira Ayuso } 7998aeff920SPablo Neira Ayuso 800a7fc9368SPablo Neira Ayuso struct nft_expr *nft_set_elem_expr_alloc(const struct nft_ctx *ctx, 801a7fc9368SPablo Neira Ayuso const struct nft_set *set, 802a7fc9368SPablo Neira Ayuso const struct nlattr *attr); 803a7fc9368SPablo Neira Ayuso 80422fe54d5SPatrick McHardy void *nft_set_elem_init(const struct nft_set *set, 80522fe54d5SPatrick McHardy const struct nft_set_ext_tmpl *tmpl, 8067b225d0bSPablo Neira Ayuso const u32 *key, const u32 *key_end, const u32 *data, 80779ebb5bbSLaura Garcia Liebana u64 timeout, u64 expiration, gfp_t gfp); 808fca05d4dSPablo Neira Ayuso int nft_set_elem_expr_clone(const struct nft_ctx *ctx, struct nft_set *set, 809fca05d4dSPablo Neira Ayuso struct nft_expr *expr_array[]); 81061f9e292SLiping Zhang void nft_set_elem_destroy(const struct nft_set *set, void *elem, 81161f9e292SLiping Zhang bool destroy_expr); 81261edafbbSPatrick McHardy 81320a69341SPatrick McHardy /** 814cfed7e1bSPatrick McHardy * struct nft_set_gc_batch_head - nf_tables set garbage collection batch 815cfed7e1bSPatrick McHardy * 816cfed7e1bSPatrick McHardy * @rcu: rcu head 817cfed7e1bSPatrick McHardy * @set: set the elements belong to 818cfed7e1bSPatrick McHardy * @cnt: count of elements 819cfed7e1bSPatrick McHardy */ 820cfed7e1bSPatrick McHardy struct nft_set_gc_batch_head { 821cfed7e1bSPatrick McHardy struct rcu_head rcu; 822cfed7e1bSPatrick McHardy const struct nft_set *set; 823cfed7e1bSPatrick McHardy unsigned int cnt; 824cfed7e1bSPatrick McHardy }; 825cfed7e1bSPatrick McHardy 826cfed7e1bSPatrick McHardy #define NFT_SET_GC_BATCH_SIZE ((PAGE_SIZE - \ 827cfed7e1bSPatrick McHardy sizeof(struct nft_set_gc_batch_head)) / \ 828cfed7e1bSPatrick McHardy sizeof(void *)) 829cfed7e1bSPatrick McHardy 830cfed7e1bSPatrick McHardy /** 831cfed7e1bSPatrick McHardy * struct nft_set_gc_batch - nf_tables set garbage collection batch 832cfed7e1bSPatrick McHardy * 833cfed7e1bSPatrick McHardy * @head: GC batch head 834cfed7e1bSPatrick McHardy * @elems: garbage collection elements 835cfed7e1bSPatrick McHardy */ 836cfed7e1bSPatrick McHardy struct nft_set_gc_batch { 837cfed7e1bSPatrick McHardy struct nft_set_gc_batch_head head; 838cfed7e1bSPatrick McHardy void *elems[NFT_SET_GC_BATCH_SIZE]; 839cfed7e1bSPatrick McHardy }; 840cfed7e1bSPatrick McHardy 841cfed7e1bSPatrick McHardy struct nft_set_gc_batch *nft_set_gc_batch_alloc(const struct nft_set *set, 842cfed7e1bSPatrick McHardy gfp_t gfp); 843cfed7e1bSPatrick McHardy void nft_set_gc_batch_release(struct rcu_head *rcu); 844cfed7e1bSPatrick McHardy 845cfed7e1bSPatrick McHardy static inline void nft_set_gc_batch_complete(struct nft_set_gc_batch *gcb) 846cfed7e1bSPatrick McHardy { 847cfed7e1bSPatrick McHardy if (gcb != NULL) 848cfed7e1bSPatrick McHardy call_rcu(&gcb->head.rcu, nft_set_gc_batch_release); 849cfed7e1bSPatrick McHardy } 850cfed7e1bSPatrick McHardy 851cfed7e1bSPatrick McHardy static inline struct nft_set_gc_batch * 852cfed7e1bSPatrick McHardy nft_set_gc_batch_check(const struct nft_set *set, struct nft_set_gc_batch *gcb, 853cfed7e1bSPatrick McHardy gfp_t gfp) 854cfed7e1bSPatrick McHardy { 855cfed7e1bSPatrick McHardy if (gcb != NULL) { 856cfed7e1bSPatrick McHardy if (gcb->head.cnt + 1 < ARRAY_SIZE(gcb->elems)) 857cfed7e1bSPatrick McHardy return gcb; 858cfed7e1bSPatrick McHardy nft_set_gc_batch_complete(gcb); 859cfed7e1bSPatrick McHardy } 860cfed7e1bSPatrick McHardy return nft_set_gc_batch_alloc(set, gfp); 861cfed7e1bSPatrick McHardy } 862cfed7e1bSPatrick McHardy 863cfed7e1bSPatrick McHardy static inline void nft_set_gc_batch_add(struct nft_set_gc_batch *gcb, 864cfed7e1bSPatrick McHardy void *elem) 865cfed7e1bSPatrick McHardy { 866cfed7e1bSPatrick McHardy gcb->elems[gcb->head.cnt++] = elem; 867cfed7e1bSPatrick McHardy } 868cfed7e1bSPatrick McHardy 869b8e20400SPablo Neira Ayuso struct nft_expr_ops; 870cfed7e1bSPatrick McHardy /** 871ef1f7df9SPatrick McHardy * struct nft_expr_type - nf_tables expression type 87296518518SPatrick McHardy * 873ef1f7df9SPatrick McHardy * @select_ops: function to select nft_expr_ops 874b8e20400SPablo Neira Ayuso * @release_ops: release nft_expr_ops 875ef1f7df9SPatrick McHardy * @ops: default ops, used when no select_ops functions is present 87696518518SPatrick McHardy * @list: used internally 87796518518SPatrick McHardy * @name: Identifier 87896518518SPatrick McHardy * @owner: module reference 87996518518SPatrick McHardy * @policy: netlink attribute policy 88096518518SPatrick McHardy * @maxattr: highest netlink attribute number 88164d46806SPatrick McHardy * @family: address family for AF-specific types 882151d799aSPatrick McHardy * @flags: expression type flags 883ef1f7df9SPatrick McHardy */ 884ef1f7df9SPatrick McHardy struct nft_expr_type { 8850ca743a5SPablo Neira Ayuso const struct nft_expr_ops *(*select_ops)(const struct nft_ctx *, 8860ca743a5SPablo Neira Ayuso const struct nlattr * const tb[]); 887b8e20400SPablo Neira Ayuso void (*release_ops)(const struct nft_expr_ops *ops); 888ef1f7df9SPatrick McHardy const struct nft_expr_ops *ops; 8893a07327dSPablo Neira Ayuso const struct nft_expr_ops *inner_ops; 890ef1f7df9SPatrick McHardy struct list_head list; 891ef1f7df9SPatrick McHardy const char *name; 892ef1f7df9SPatrick McHardy struct module *owner; 893ef1f7df9SPatrick McHardy const struct nla_policy *policy; 894ef1f7df9SPatrick McHardy unsigned int maxattr; 89564d46806SPatrick McHardy u8 family; 896151d799aSPatrick McHardy u8 flags; 897ef1f7df9SPatrick McHardy }; 898ef1f7df9SPatrick McHardy 899151d799aSPatrick McHardy #define NFT_EXPR_STATEFUL 0x1 90079b174adSPablo Neira Ayuso #define NFT_EXPR_GC 0x2 901151d799aSPatrick McHardy 902f6ac8585SPablo Neira Ayuso enum nft_trans_phase { 903f6ac8585SPablo Neira Ayuso NFT_TRANS_PREPARE, 904*26b5a571SPablo Neira Ayuso NFT_TRANS_PREPARE_ERROR, 905f6ac8585SPablo Neira Ayuso NFT_TRANS_ABORT, 906f6ac8585SPablo Neira Ayuso NFT_TRANS_COMMIT, 907f6ac8585SPablo Neira Ayuso NFT_TRANS_RELEASE 908f6ac8585SPablo Neira Ayuso }; 909f6ac8585SPablo Neira Ayuso 910c9626a2cSPablo Neira Ayuso struct nft_flow_rule; 911c9626a2cSPablo Neira Ayuso struct nft_offload_ctx; 912c9626a2cSPablo Neira Ayuso 913ef1f7df9SPatrick McHardy /** 914ef1f7df9SPatrick McHardy * struct nft_expr_ops - nf_tables expression operations 915ef1f7df9SPatrick McHardy * 916ef1f7df9SPatrick McHardy * @eval: Expression evaluation function 91796518518SPatrick McHardy * @size: full expression size, including private data size 918ef1f7df9SPatrick McHardy * @init: initialization function 919cd5125d8SFlorian Westphal * @activate: activate expression in the next generation 920cd5125d8SFlorian Westphal * @deactivate: deactivate expression in next generation 921cd5125d8SFlorian Westphal * @destroy: destruction function, called after synchronize_rcu 922ef1f7df9SPatrick McHardy * @dump: function to dump parameters 923ef1f7df9SPatrick McHardy * @type: expression type 9240ca743a5SPablo Neira Ayuso * @validate: validate expression, called during loop detection 9250ca743a5SPablo Neira Ayuso * @data: extra data to attach to this expression operation 92696518518SPatrick McHardy */ 92796518518SPatrick McHardy struct nft_expr_ops { 92896518518SPatrick McHardy void (*eval)(const struct nft_expr *expr, 929a55e22e9SPatrick McHardy struct nft_regs *regs, 93096518518SPatrick McHardy const struct nft_pktinfo *pkt); 931086f3321SPablo Neira Ayuso int (*clone)(struct nft_expr *dst, 932086f3321SPablo Neira Ayuso const struct nft_expr *src); 933ef1f7df9SPatrick McHardy unsigned int size; 934ef1f7df9SPatrick McHardy 93596518518SPatrick McHardy int (*init)(const struct nft_ctx *ctx, 93696518518SPatrick McHardy const struct nft_expr *expr, 93796518518SPatrick McHardy const struct nlattr * const tb[]); 938bb7b40aeSPablo Neira Ayuso void (*activate)(const struct nft_ctx *ctx, 939bb7b40aeSPablo Neira Ayuso const struct nft_expr *expr); 940bb7b40aeSPablo Neira Ayuso void (*deactivate)(const struct nft_ctx *ctx, 941f6ac8585SPablo Neira Ayuso const struct nft_expr *expr, 942f6ac8585SPablo Neira Ayuso enum nft_trans_phase phase); 94362472bceSPatrick McHardy void (*destroy)(const struct nft_ctx *ctx, 94462472bceSPatrick McHardy const struct nft_expr *expr); 945371ebcbbSPablo Neira Ayuso void (*destroy_clone)(const struct nft_ctx *ctx, 946371ebcbbSPablo Neira Ayuso const struct nft_expr *expr); 94796518518SPatrick McHardy int (*dump)(struct sk_buff *skb, 9487d34aa3eSPhil Sutter const struct nft_expr *expr, 9497d34aa3eSPhil Sutter bool reset); 9500ca743a5SPablo Neira Ayuso int (*validate)(const struct nft_ctx *ctx, 9510ca743a5SPablo Neira Ayuso const struct nft_expr *expr, 9520ca743a5SPablo Neira Ayuso const struct nft_data **data); 95312e4ecfaSPablo Neira Ayuso bool (*reduce)(struct nft_regs_track *track, 95412e4ecfaSPablo Neira Ayuso const struct nft_expr *expr); 95579b174adSPablo Neira Ayuso bool (*gc)(struct net *net, 95679b174adSPablo Neira Ayuso const struct nft_expr *expr); 957c9626a2cSPablo Neira Ayuso int (*offload)(struct nft_offload_ctx *ctx, 958c9626a2cSPablo Neira Ayuso struct nft_flow_rule *flow, 959c9626a2cSPablo Neira Ayuso const struct nft_expr *expr); 960b1a5983fSPablo Neira Ayuso bool (*offload_action)(const struct nft_expr *expr); 961b72920f6SPablo Neira Ayuso void (*offload_stats)(struct nft_expr *expr, 962b72920f6SPablo Neira Ayuso const struct flow_stats *stats); 963ef1f7df9SPatrick McHardy const struct nft_expr_type *type; 9640ca743a5SPablo Neira Ayuso void *data; 96596518518SPatrick McHardy }; 96696518518SPatrick McHardy 96796518518SPatrick McHardy /** 96896518518SPatrick McHardy * struct nft_rule - nf_tables rule 96996518518SPatrick McHardy * 97096518518SPatrick McHardy * @list: used internally 97196518518SPatrick McHardy * @handle: rule handle 9720628b123SPablo Neira Ayuso * @genmask: generation mask 97396518518SPatrick McHardy * @dlen: length of expression data 97486f1ec32SPatrick McHardy * @udata: user data is appended to the rule 97596518518SPatrick McHardy * @data: expression data 97696518518SPatrick McHardy */ 97796518518SPatrick McHardy struct nft_rule { 97896518518SPatrick McHardy struct list_head list; 9790768b3b3SPablo Neira Ayuso u64 handle:42, 9800628b123SPablo Neira Ayuso genmask:2, 9810768b3b3SPablo Neira Ayuso dlen:12, 98286f1ec32SPatrick McHardy udata:1; 98396518518SPatrick McHardy unsigned char data[] 98496518518SPatrick McHardy __attribute__((aligned(__alignof__(struct nft_expr)))); 98596518518SPatrick McHardy }; 98696518518SPatrick McHardy 98796518518SPatrick McHardy static inline struct nft_expr *nft_expr_first(const struct nft_rule *rule) 98896518518SPatrick McHardy { 98996518518SPatrick McHardy return (struct nft_expr *)&rule->data[0]; 99096518518SPatrick McHardy } 99196518518SPatrick McHardy 99296518518SPatrick McHardy static inline struct nft_expr *nft_expr_next(const struct nft_expr *expr) 99396518518SPatrick McHardy { 99496518518SPatrick McHardy return ((void *)expr) + expr->ops->size; 99596518518SPatrick McHardy } 99696518518SPatrick McHardy 99796518518SPatrick McHardy static inline struct nft_expr *nft_expr_last(const struct nft_rule *rule) 99896518518SPatrick McHardy { 99996518518SPatrick McHardy return (struct nft_expr *)&rule->data[rule->dlen]; 100096518518SPatrick McHardy } 100196518518SPatrick McHardy 100231cc578aSSaeed Mirzamohammadi static inline bool nft_expr_more(const struct nft_rule *rule, 100331cc578aSSaeed Mirzamohammadi const struct nft_expr *expr) 100431cc578aSSaeed Mirzamohammadi { 100531cc578aSSaeed Mirzamohammadi return expr != nft_expr_last(rule) && expr->ops; 100631cc578aSSaeed Mirzamohammadi } 100731cc578aSSaeed Mirzamohammadi 100886f1ec32SPatrick McHardy static inline struct nft_userdata *nft_userdata(const struct nft_rule *rule) 10090768b3b3SPablo Neira Ayuso { 10100768b3b3SPablo Neira Ayuso return (void *)&rule->data[rule->dlen]; 10110768b3b3SPablo Neira Ayuso } 10120768b3b3SPablo Neira Ayuso 10134bedf9eeSPablo Neira Ayuso void nft_rule_expr_activate(const struct nft_ctx *ctx, struct nft_rule *rule); 10144bedf9eeSPablo Neira Ayuso void nft_rule_expr_deactivate(const struct nft_ctx *ctx, struct nft_rule *rule, 10154bedf9eeSPablo Neira Ayuso enum nft_trans_phase phase); 10164bedf9eeSPablo Neira Ayuso void nf_tables_rule_destroy(const struct nft_ctx *ctx, struct nft_rule *rule); 1017d0e2c7deSPablo Neira Ayuso 101876adfafeSPablo Neira Ayuso static inline void nft_set_elem_update_expr(const struct nft_set_ext *ext, 101976adfafeSPablo Neira Ayuso struct nft_regs *regs, 102076adfafeSPablo Neira Ayuso const struct nft_pktinfo *pkt) 102176adfafeSPablo Neira Ayuso { 1022563125a7SPablo Neira Ayuso struct nft_set_elem_expr *elem_expr; 102376adfafeSPablo Neira Ayuso struct nft_expr *expr; 1024563125a7SPablo Neira Ayuso u32 size; 102576adfafeSPablo Neira Ayuso 1026563125a7SPablo Neira Ayuso if (__nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS)) { 1027563125a7SPablo Neira Ayuso elem_expr = nft_set_ext_expr(ext); 1028563125a7SPablo Neira Ayuso nft_setelem_expr_foreach(expr, elem_expr, size) { 102976adfafeSPablo Neira Ayuso expr->ops->eval(expr, regs, pkt); 1030563125a7SPablo Neira Ayuso if (regs->verdict.code == NFT_BREAK) 1031563125a7SPablo Neira Ayuso return; 1032563125a7SPablo Neira Ayuso } 103376adfafeSPablo Neira Ayuso } 103476adfafeSPablo Neira Ayuso } 103576adfafeSPablo Neira Ayuso 103696518518SPatrick McHardy /* 103796518518SPatrick McHardy * The last pointer isn't really necessary, but the compiler isn't able to 103896518518SPatrick McHardy * determine that the result of nft_expr_last() is always the same since it 103996518518SPatrick McHardy * can't assume that the dlen value wasn't changed within calls in the loop. 104096518518SPatrick McHardy */ 104196518518SPatrick McHardy #define nft_rule_for_each_expr(expr, last, rule) \ 104296518518SPatrick McHardy for ((expr) = nft_expr_first(rule), (last) = nft_expr_last(rule); \ 104396518518SPatrick McHardy (expr) != (last); \ 104496518518SPatrick McHardy (expr) = nft_expr_next(expr)) 104596518518SPatrick McHardy 1046ad652f38SPablo Neira Ayuso #define NFT_CHAIN_POLICY_UNSET U8_MAX 1047ad652f38SPablo Neira Ayuso 10482c865a8aSPablo Neira Ayuso struct nft_rule_dp { 10492c865a8aSPablo Neira Ayuso u64 is_last:1, 10502c865a8aSPablo Neira Ayuso dlen:12, 10512c865a8aSPablo Neira Ayuso handle:42; /* for tracing */ 10522c865a8aSPablo Neira Ayuso unsigned char data[] 10532c865a8aSPablo Neira Ayuso __attribute__((aligned(__alignof__(struct nft_expr)))); 10542c865a8aSPablo Neira Ayuso }; 10552c865a8aSPablo Neira Ayuso 105663e9bbbcSFlorian Westphal struct nft_rule_dp_last { 105763e9bbbcSFlorian Westphal struct nft_rule_dp end; /* end of nft_rule_blob marker */ 105863e9bbbcSFlorian Westphal struct rcu_head h; /* call_rcu head */ 105963e9bbbcSFlorian Westphal struct nft_rule_blob *blob; /* ptr to free via call_rcu */ 106063e9bbbcSFlorian Westphal const struct nft_chain *chain; /* for nftables tracing */ 106163e9bbbcSFlorian Westphal }; 106263e9bbbcSFlorian Westphal 106363e9bbbcSFlorian Westphal static inline const struct nft_rule_dp *nft_rule_next(const struct nft_rule_dp *rule) 106463e9bbbcSFlorian Westphal { 106563e9bbbcSFlorian Westphal return (void *)rule + sizeof(*rule) + rule->dlen; 106663e9bbbcSFlorian Westphal } 106763e9bbbcSFlorian Westphal 10682c865a8aSPablo Neira Ayuso struct nft_rule_blob { 10692c865a8aSPablo Neira Ayuso unsigned long size; 10702c865a8aSPablo Neira Ayuso unsigned char data[] 10712c865a8aSPablo Neira Ayuso __attribute__((aligned(__alignof__(struct nft_rule_dp)))); 10722c865a8aSPablo Neira Ayuso }; 10732c865a8aSPablo Neira Ayuso 107496518518SPatrick McHardy /** 107596518518SPatrick McHardy * struct nft_chain - nf_tables chain 107696518518SPatrick McHardy * 107796518518SPatrick McHardy * @rules: list of rules in the chain 107896518518SPatrick McHardy * @list: used internally 10791b2470e5SFlorian Westphal * @rhlhead: used internally 1080b5bc89bfSPablo Neira Ayuso * @table: table that this chain belongs to 108196518518SPatrick McHardy * @handle: chain handle 108296518518SPatrick McHardy * @use: number of jump references to this chain 1083a0a7379eSPablo Neira Ayuso * @flags: bitmask of enum nft_chain_flags 108496518518SPatrick McHardy * @name: name of the chain 108596518518SPatrick McHardy */ 108696518518SPatrick McHardy struct nft_chain { 10872c865a8aSPablo Neira Ayuso struct nft_rule_blob __rcu *blob_gen_0; 10882c865a8aSPablo Neira Ayuso struct nft_rule_blob __rcu *blob_gen_1; 108996518518SPatrick McHardy struct list_head rules; 109096518518SPatrick McHardy struct list_head list; 10911b2470e5SFlorian Westphal struct rhlist_head rhlhead; 1092b5bc89bfSPablo Neira Ayuso struct nft_table *table; 109396518518SPatrick McHardy u64 handle; 1094a0a7379eSPablo Neira Ayuso u32 use; 1095d0e2c7deSPablo Neira Ayuso u8 flags:5, 1096d0e2c7deSPablo Neira Ayuso bound:1, 1097664b0f8cSPablo Neira Ayuso genmask:2; 1098b7263e07SPhil Sutter char *name; 1099002f2176SJose M. Guisado Gomez u16 udlen; 1100002f2176SJose M. Guisado Gomez u8 *udata; 11010cbc06b3SFlorian Westphal 11020cbc06b3SFlorian Westphal /* Only used during control plane commit phase: */ 11032c865a8aSPablo Neira Ayuso struct nft_rule_blob *blob_next; 110496518518SPatrick McHardy }; 110596518518SPatrick McHardy 1106a654de8fSPablo Neira Ayuso int nft_chain_validate(const struct nft_ctx *ctx, const struct nft_chain *chain); 1107d46fc894SPablo Neira Ayuso int nft_setelem_validate(const struct nft_ctx *ctx, struct nft_set *set, 1108d46fc894SPablo Neira Ayuso const struct nft_set_iter *iter, 1109d46fc894SPablo Neira Ayuso struct nft_set_elem *elem); 1110d46fc894SPablo Neira Ayuso int nft_set_catchall_validate(const struct nft_ctx *ctx, struct nft_set *set); 11114bedf9eeSPablo Neira Ayuso int nf_tables_bind_chain(const struct nft_ctx *ctx, struct nft_chain *chain); 1112*26b5a571SPablo Neira Ayuso void nf_tables_unbind_chain(const struct nft_ctx *ctx, struct nft_chain *chain); 1113a654de8fSPablo Neira Ayuso 111432537e91SPablo Neira Ayuso enum nft_chain_types { 11159370761cSPablo Neira Ayuso NFT_CHAIN_T_DEFAULT = 0, 11169370761cSPablo Neira Ayuso NFT_CHAIN_T_ROUTE, 11179370761cSPablo Neira Ayuso NFT_CHAIN_T_NAT, 11189370761cSPablo Neira Ayuso NFT_CHAIN_T_MAX 11199370761cSPablo Neira Ayuso }; 11209370761cSPablo Neira Ayuso 11211a1e1a12SPatrick McHardy /** 112232537e91SPablo Neira Ayuso * struct nft_chain_type - nf_tables chain type info 11231a1e1a12SPatrick McHardy * 11241a1e1a12SPatrick McHardy * @name: name of the type 11251a1e1a12SPatrick McHardy * @type: numeric identifier 11261a1e1a12SPatrick McHardy * @family: address family 11271a1e1a12SPatrick McHardy * @owner: module owner 11281a1e1a12SPatrick McHardy * @hook_mask: mask of valid hooks 1129c2f9eafeSPablo Neira Ayuso * @hooks: array of hook functions 11304e25ceb8SFlorian Westphal * @ops_register: base chain register function 11314e25ceb8SFlorian Westphal * @ops_unregister: base chain unregister function 11321a1e1a12SPatrick McHardy */ 113332537e91SPablo Neira Ayuso struct nft_chain_type { 11341a1e1a12SPatrick McHardy const char *name; 113532537e91SPablo Neira Ayuso enum nft_chain_types type; 11361a1e1a12SPatrick McHardy int family; 11371a1e1a12SPatrick McHardy struct module *owner; 11381a1e1a12SPatrick McHardy unsigned int hook_mask; 1139d25e2e93SPablo Neira Ayuso nf_hookfn *hooks[NFT_MAX_HOOKS]; 11404e25ceb8SFlorian Westphal int (*ops_register)(struct net *net, const struct nf_hook_ops *ops); 11414e25ceb8SFlorian Westphal void (*ops_unregister)(struct net *net, const struct nf_hook_ops *ops); 11421a1e1a12SPatrick McHardy }; 11431a1e1a12SPatrick McHardy 11447210e4e3SPablo Neira Ayuso int nft_chain_validate_dependency(const struct nft_chain *chain, 114532537e91SPablo Neira Ayuso enum nft_chain_types type); 114675e8d06dSPablo Neira Ayuso int nft_chain_validate_hooks(const struct nft_chain *chain, 114775e8d06dSPablo Neira Ayuso unsigned int hook_flags); 11487210e4e3SPablo Neira Ayuso 11494bedf9eeSPablo Neira Ayuso static inline bool nft_chain_binding(const struct nft_chain *chain) 11504bedf9eeSPablo Neira Ayuso { 11514bedf9eeSPablo Neira Ayuso return chain->flags & NFT_CHAIN_BINDING; 11524bedf9eeSPablo Neira Ayuso } 11534bedf9eeSPablo Neira Ayuso 1154d0e2c7deSPablo Neira Ayuso static inline bool nft_chain_is_bound(struct nft_chain *chain) 1155d0e2c7deSPablo Neira Ayuso { 1156d0e2c7deSPablo Neira Ayuso return (chain->flags & NFT_CHAIN_BINDING) && chain->bound; 1157d0e2c7deSPablo Neira Ayuso } 1158d0e2c7deSPablo Neira Ayuso 11594bedf9eeSPablo Neira Ayuso int nft_chain_add(struct nft_table *table, struct nft_chain *chain); 1160d0e2c7deSPablo Neira Ayuso void nft_chain_del(struct nft_chain *chain); 1161d0e2c7deSPablo Neira Ayuso void nf_tables_chain_destroy(struct nft_ctx *ctx); 1162d0e2c7deSPablo Neira Ayuso 11630ca743a5SPablo Neira Ayuso struct nft_stats { 11640ca743a5SPablo Neira Ayuso u64 bytes; 11650ca743a5SPablo Neira Ayuso u64 pkts; 1166ce355e20SEric Dumazet struct u64_stats_sync syncp; 11670ca743a5SPablo Neira Ayuso }; 11680ca743a5SPablo Neira Ayuso 11693f0465a9SPablo Neira Ayuso struct nft_hook { 11703f0465a9SPablo Neira Ayuso struct list_head list; 11713f0465a9SPablo Neira Ayuso struct nf_hook_ops ops; 11723f0465a9SPablo Neira Ayuso struct rcu_head rcu; 11733f0465a9SPablo Neira Ayuso }; 11743f0465a9SPablo Neira Ayuso 117596518518SPatrick McHardy /** 117696518518SPatrick McHardy * struct nft_base_chain - nf_tables base chain 117796518518SPatrick McHardy * 117896518518SPatrick McHardy * @ops: netfilter hook ops 1179d54725cdSPablo Neira Ayuso * @hook_list: list of netfilter hooks (for NFPROTO_NETDEV family) 11809370761cSPablo Neira Ayuso * @type: chain type 11810ca743a5SPablo Neira Ayuso * @policy: default policy 11820ca743a5SPablo Neira Ayuso * @stats: per-cpu chain stats 118396518518SPatrick McHardy * @chain: the chain 118414bfb13fSPablo Neira Ayuso * @flow_block: flow block (for hardware offload) 118596518518SPatrick McHardy */ 118696518518SPatrick McHardy struct nft_base_chain { 1187c974a3a3SPablo Neira Ayuso struct nf_hook_ops ops; 1188d54725cdSPablo Neira Ayuso struct list_head hook_list; 118932537e91SPablo Neira Ayuso const struct nft_chain_type *type; 11900ca743a5SPablo Neira Ayuso u8 policy; 1191835b8033SPablo Neira Ayuso u8 flags; 11920ca743a5SPablo Neira Ayuso struct nft_stats __percpu *stats; 119396518518SPatrick McHardy struct nft_chain chain; 119414bfb13fSPablo Neira Ayuso struct flow_block flow_block; 119596518518SPatrick McHardy }; 119696518518SPatrick McHardy 119796518518SPatrick McHardy static inline struct nft_base_chain *nft_base_chain(const struct nft_chain *chain) 119896518518SPatrick McHardy { 119996518518SPatrick McHardy return container_of(chain, struct nft_base_chain, chain); 120096518518SPatrick McHardy } 120196518518SPatrick McHardy 1202f323d954SPablo Neira Ayuso static inline bool nft_is_base_chain(const struct nft_chain *chain) 1203f323d954SPablo Neira Ayuso { 120467c49de4SPablo Neira Ayuso return chain->flags & NFT_CHAIN_BASE; 1205f323d954SPablo Neira Ayuso } 1206f323d954SPablo Neira Ayuso 12075ebe0b0eSPablo Neira Ayuso int __nft_release_basechain(struct nft_ctx *ctx); 1208835b8033SPablo Neira Ayuso 120906198b34SEric W. Biederman unsigned int nft_do_chain(struct nft_pktinfo *pkt, void *priv); 121096518518SPatrick McHardy 121196518518SPatrick McHardy /** 121296518518SPatrick McHardy * struct nft_table - nf_tables table 121396518518SPatrick McHardy * 121496518518SPatrick McHardy * @list: used internally 12151b2470e5SFlorian Westphal * @chains_ht: chains in the table 12161b2470e5SFlorian Westphal * @chains: same, for stable walks 121796518518SPatrick McHardy * @sets: sets in the table 1218e5009240SPablo Neira Ayuso * @objects: stateful objects in the table 12193b49e2e9SPablo Neira Ayuso * @flowtables: flow tables in the table 122096518518SPatrick McHardy * @hgenerator: handle generator state 12213ecbfd65SHarsha Sharma * @handle: table handle 122296518518SPatrick McHardy * @use: number of chain references to this table 122396518518SPatrick McHardy * @flags: table flag (see enum nft_table_flags) 1224f2a6d766SPablo Neira Ayuso * @genmask: generation mask 122536596dadSPablo Neira Ayuso * @afinfo: address family info 122696518518SPatrick McHardy * @name: name of the table 122700c320f9SFlorian Westphal * @validate_state: internal, set when transaction adds jumps 122896518518SPatrick McHardy */ 122996518518SPatrick McHardy struct nft_table { 123096518518SPatrick McHardy struct list_head list; 12311b2470e5SFlorian Westphal struct rhltable chains_ht; 123296518518SPatrick McHardy struct list_head chains; 123396518518SPatrick McHardy struct list_head sets; 1234e5009240SPablo Neira Ayuso struct list_head objects; 12353b49e2e9SPablo Neira Ayuso struct list_head flowtables; 123696518518SPatrick McHardy u64 hgenerator; 12373ecbfd65SHarsha Sharma u64 handle; 123896518518SPatrick McHardy u32 use; 123998319cb9SPablo Neira Ayuso u16 family:6, 124098319cb9SPablo Neira Ayuso flags:8, 1241f2a6d766SPablo Neira Ayuso genmask:2; 12426001a930SPablo Neira Ayuso u32 nlpid; 1243e46abbccSPhil Sutter char *name; 12447a81575bSJose M. Guisado Gomez u16 udlen; 12457a81575bSJose M. Guisado Gomez u8 *udata; 124600c320f9SFlorian Westphal u8 validate_state; 1247ebddf1a8SPablo Neira Ayuso }; 1248ebddf1a8SPablo Neira Ayuso 12496001a930SPablo Neira Ayuso static inline bool nft_table_has_owner(const struct nft_table *table) 12506001a930SPablo Neira Ayuso { 12516001a930SPablo Neira Ayuso return table->flags & NFT_TABLE_F_OWNER; 12526001a930SPablo Neira Ayuso } 12536001a930SPablo Neira Ayuso 1254d3519cb8SPablo Neira Ayuso static inline bool nft_base_chain_netdev(int family, u32 hooknum) 1255d3519cb8SPablo Neira Ayuso { 1256d3519cb8SPablo Neira Ayuso return family == NFPROTO_NETDEV || 1257d3519cb8SPablo Neira Ayuso (family == NFPROTO_INET && hooknum == NF_INET_INGRESS); 1258d3519cb8SPablo Neira Ayuso } 1259d3519cb8SPablo Neira Ayuso 1260cc07eeb0SPablo Neira Ayuso void nft_register_chain_type(const struct nft_chain_type *); 126132537e91SPablo Neira Ayuso void nft_unregister_chain_type(const struct nft_chain_type *); 126296518518SPatrick McHardy 12635eccdfaaSJoe Perches int nft_register_expr(struct nft_expr_type *); 12645eccdfaaSJoe Perches void nft_unregister_expr(struct nft_expr_type *); 126596518518SPatrick McHardy 126633d5a7b1SFlorian Westphal int nft_verdict_dump(struct sk_buff *skb, int type, 126733d5a7b1SFlorian Westphal const struct nft_verdict *v); 126833d5a7b1SFlorian Westphal 126933d5a7b1SFlorian Westphal /** 1270d152159bSFlorian Westphal * struct nft_object_hash_key - key to lookup nft_object 1271d152159bSFlorian Westphal * 1272d152159bSFlorian Westphal * @name: name of the stateful object to look up 1273d152159bSFlorian Westphal * @table: table the object belongs to 1274d152159bSFlorian Westphal */ 1275d152159bSFlorian Westphal struct nft_object_hash_key { 1276d152159bSFlorian Westphal const char *name; 1277d152159bSFlorian Westphal const struct nft_table *table; 1278d152159bSFlorian Westphal }; 1279d152159bSFlorian Westphal 1280d152159bSFlorian Westphal /** 1281e5009240SPablo Neira Ayuso * struct nft_object - nf_tables stateful object 1282e5009240SPablo Neira Ayuso * 1283e5009240SPablo Neira Ayuso * @list: table stateful object list node 1284d152159bSFlorian Westphal * @key: keys that identify this object 12854d44175aSFlorian Westphal * @rhlhead: nft_objname_ht node 1286e5009240SPablo Neira Ayuso * @genmask: generation mask 1287e5009240SPablo Neira Ayuso * @use: number of references to this stateful object 12883ecbfd65SHarsha Sharma * @handle: unique object handle 1289dfc46034SPablo M. Bermudo Garay * @ops: object operations 12903ecbfd65SHarsha Sharma * @data: object data, layout depends on type 1291e5009240SPablo Neira Ayuso */ 1292e5009240SPablo Neira Ayuso struct nft_object { 1293e5009240SPablo Neira Ayuso struct list_head list; 12944d44175aSFlorian Westphal struct rhlist_head rhlhead; 1295d152159bSFlorian Westphal struct nft_object_hash_key key; 1296e5009240SPablo Neira Ayuso u32 genmask:2, 1297e5009240SPablo Neira Ayuso use:30; 12983ecbfd65SHarsha Sharma u64 handle; 1299b131c964SJose M. Guisado Gomez u16 udlen; 1300b131c964SJose M. Guisado Gomez u8 *udata; 1301e5009240SPablo Neira Ayuso /* runtime data below here */ 1302dfc46034SPablo M. Bermudo Garay const struct nft_object_ops *ops ____cacheline_aligned; 1303e5009240SPablo Neira Ayuso unsigned char data[] 1304e5009240SPablo Neira Ayuso __attribute__((aligned(__alignof__(u64)))); 1305e5009240SPablo Neira Ayuso }; 1306e5009240SPablo Neira Ayuso 1307e5009240SPablo Neira Ayuso static inline void *nft_obj_data(const struct nft_object *obj) 1308e5009240SPablo Neira Ayuso { 1309e5009240SPablo Neira Ayuso return (void *)obj->data; 1310e5009240SPablo Neira Ayuso } 1311e5009240SPablo Neira Ayuso 1312e5009240SPablo Neira Ayuso #define nft_expr_obj(expr) *((struct nft_object **)nft_expr_priv(expr)) 1313e5009240SPablo Neira Ayuso 13144d44175aSFlorian Westphal struct nft_object *nft_obj_lookup(const struct net *net, 13154d44175aSFlorian Westphal const struct nft_table *table, 1316e5009240SPablo Neira Ayuso const struct nlattr *nla, u32 objtype, 1317e5009240SPablo Neira Ayuso u8 genmask); 1318e5009240SPablo Neira Ayuso 1319d152159bSFlorian Westphal void nft_obj_notify(struct net *net, const struct nft_table *table, 13202599e989SPablo Neira Ayuso struct nft_object *obj, u32 portid, u32 seq, 13216fb721cfSPablo Neira Ayuso int event, u16 flags, int family, int report, gfp_t gfp); 13222599e989SPablo Neira Ayuso 1323e5009240SPablo Neira Ayuso /** 1324e5009240SPablo Neira Ayuso * struct nft_object_type - stateful object type 1325e5009240SPablo Neira Ayuso * 1326dfc46034SPablo M. Bermudo Garay * @select_ops: function to select nft_object_ops 1327dfc46034SPablo M. Bermudo Garay * @ops: default ops, used when no select_ops functions is present 1328e5009240SPablo Neira Ayuso * @list: list node in list of object types 1329e5009240SPablo Neira Ayuso * @type: stateful object numeric type 1330e5009240SPablo Neira Ayuso * @owner: module owner 1331e5009240SPablo Neira Ayuso * @maxattr: maximum netlink attribute 1332e5009240SPablo Neira Ayuso * @policy: netlink attribute policy 1333dfc46034SPablo M. Bermudo Garay */ 1334dfc46034SPablo M. Bermudo Garay struct nft_object_type { 1335dfc46034SPablo M. Bermudo Garay const struct nft_object_ops *(*select_ops)(const struct nft_ctx *, 1336dfc46034SPablo M. Bermudo Garay const struct nlattr * const tb[]); 1337dfc46034SPablo M. Bermudo Garay const struct nft_object_ops *ops; 1338dfc46034SPablo M. Bermudo Garay struct list_head list; 1339dfc46034SPablo M. Bermudo Garay u32 type; 1340dfc46034SPablo M. Bermudo Garay unsigned int maxattr; 1341dfc46034SPablo M. Bermudo Garay struct module *owner; 1342dfc46034SPablo M. Bermudo Garay const struct nla_policy *policy; 1343dfc46034SPablo M. Bermudo Garay }; 1344dfc46034SPablo M. Bermudo Garay 1345dfc46034SPablo M. Bermudo Garay /** 1346dfc46034SPablo M. Bermudo Garay * struct nft_object_ops - stateful object operations 1347dfc46034SPablo M. Bermudo Garay * 1348dfc46034SPablo M. Bermudo Garay * @eval: stateful object evaluation function 1349dfc46034SPablo M. Bermudo Garay * @size: stateful object size 1350e5009240SPablo Neira Ayuso * @init: initialize object from netlink attributes 1351e5009240SPablo Neira Ayuso * @destroy: release existing stateful object 1352e5009240SPablo Neira Ayuso * @dump: netlink dump stateful object 1353d62d0ba9SFernando Fernandez Mancera * @update: update stateful object 1354e5009240SPablo Neira Ayuso */ 1355dfc46034SPablo M. Bermudo Garay struct nft_object_ops { 1356e5009240SPablo Neira Ayuso void (*eval)(struct nft_object *obj, 1357e5009240SPablo Neira Ayuso struct nft_regs *regs, 1358e5009240SPablo Neira Ayuso const struct nft_pktinfo *pkt); 1359e5009240SPablo Neira Ayuso unsigned int size; 136084fba055SFlorian Westphal int (*init)(const struct nft_ctx *ctx, 136184fba055SFlorian Westphal const struct nlattr *const tb[], 1362e5009240SPablo Neira Ayuso struct nft_object *obj); 136300bfb320SPablo Neira Ayuso void (*destroy)(const struct nft_ctx *ctx, 136400bfb320SPablo Neira Ayuso struct nft_object *obj); 1365e5009240SPablo Neira Ayuso int (*dump)(struct sk_buff *skb, 136643da04a5SPablo Neira Ayuso struct nft_object *obj, 136743da04a5SPablo Neira Ayuso bool reset); 1368d62d0ba9SFernando Fernandez Mancera void (*update)(struct nft_object *obj, 1369d62d0ba9SFernando Fernandez Mancera struct nft_object *newobj); 1370dfc46034SPablo M. Bermudo Garay const struct nft_object_type *type; 1371e5009240SPablo Neira Ayuso }; 1372e5009240SPablo Neira Ayuso 1373e5009240SPablo Neira Ayuso int nft_register_obj(struct nft_object_type *obj_type); 1374e5009240SPablo Neira Ayuso void nft_unregister_obj(struct nft_object_type *obj_type); 1375e5009240SPablo Neira Ayuso 1376cb662ac6SPablo Neira Ayuso #define NFT_NETDEVICE_MAX 256 1377d92191aaSPablo Neira Ayuso 1378e5009240SPablo Neira Ayuso /** 13793b49e2e9SPablo Neira Ayuso * struct nft_flowtable - nf_tables flow table 13803b49e2e9SPablo Neira Ayuso * 13813b49e2e9SPablo Neira Ayuso * @list: flow table list node in table list 13823b49e2e9SPablo Neira Ayuso * @table: the table the flow table is contained in 13833b49e2e9SPablo Neira Ayuso * @name: name of this flow table 13843b49e2e9SPablo Neira Ayuso * @hooknum: hook number 13853b49e2e9SPablo Neira Ayuso * @ops_len: number of hooks in array 13863b49e2e9SPablo Neira Ayuso * @genmask: generation mask 13873b49e2e9SPablo Neira Ayuso * @use: number of references to this flow table 13883ecbfd65SHarsha Sharma * @handle: unique object handle 1389d92191aaSPablo Neira Ayuso * @dev_name: array of device names 13903b49e2e9SPablo Neira Ayuso * @data: rhashtable and garbage collector 13913b49e2e9SPablo Neira Ayuso * @ops: array of hooks 13923b49e2e9SPablo Neira Ayuso */ 13933b49e2e9SPablo Neira Ayuso struct nft_flowtable { 13943b49e2e9SPablo Neira Ayuso struct list_head list; 13953b49e2e9SPablo Neira Ayuso struct nft_table *table; 13963b49e2e9SPablo Neira Ayuso char *name; 13973b49e2e9SPablo Neira Ayuso int hooknum; 13983b49e2e9SPablo Neira Ayuso int ops_len; 13993b49e2e9SPablo Neira Ayuso u32 genmask:2, 14003b49e2e9SPablo Neira Ayuso use:30; 14013ecbfd65SHarsha Sharma u64 handle; 14023b49e2e9SPablo Neira Ayuso /* runtime data below here */ 14033f0465a9SPablo Neira Ayuso struct list_head hook_list ____cacheline_aligned; 14043b49e2e9SPablo Neira Ayuso struct nf_flowtable data; 14053b49e2e9SPablo Neira Ayuso }; 14063b49e2e9SPablo Neira Ayuso 1407cac20fcdSPablo Neira Ayuso struct nft_flowtable *nft_flowtable_lookup(const struct nft_table *table, 14083b49e2e9SPablo Neira Ayuso const struct nlattr *nla, 14093b49e2e9SPablo Neira Ayuso u8 genmask); 14103b49e2e9SPablo Neira Ayuso 14119b05b6e1SLaura Garcia Liebana void nf_tables_deactivate_flowtable(const struct nft_ctx *ctx, 14129b05b6e1SLaura Garcia Liebana struct nft_flowtable *flowtable, 14139b05b6e1SLaura Garcia Liebana enum nft_trans_phase phase); 14149b05b6e1SLaura Garcia Liebana 14153b49e2e9SPablo Neira Ayuso void nft_register_flowtable_type(struct nf_flowtable_type *type); 14163b49e2e9SPablo Neira Ayuso void nft_unregister_flowtable_type(struct nf_flowtable_type *type); 14173b49e2e9SPablo Neira Ayuso 14183b49e2e9SPablo Neira Ayuso /** 141933d5a7b1SFlorian Westphal * struct nft_traceinfo - nft tracing information and state 142033d5a7b1SFlorian Westphal * 1421e34b9ed9SFlorian Westphal * @trace: other struct members are initialised 1422e34b9ed9SFlorian Westphal * @nf_trace: copy of skb->nf_trace before rule evaluation 1423e34b9ed9SFlorian Westphal * @type: event type (enum nft_trace_types) 1424e34b9ed9SFlorian Westphal * @skbid: hash of skb to be used as trace id 1425e34b9ed9SFlorian Westphal * @packet_dumped: packet headers sent in a previous traceinfo message 142633d5a7b1SFlorian Westphal * @basechain: base chain currently processed 142733d5a7b1SFlorian Westphal */ 142833d5a7b1SFlorian Westphal struct nft_traceinfo { 1429e34b9ed9SFlorian Westphal bool trace; 1430e34b9ed9SFlorian Westphal bool nf_trace; 1431e34b9ed9SFlorian Westphal bool packet_dumped; 1432e34b9ed9SFlorian Westphal enum nft_trace_types type:8; 1433e34b9ed9SFlorian Westphal u32 skbid; 143433d5a7b1SFlorian Westphal const struct nft_base_chain *basechain; 143533d5a7b1SFlorian Westphal }; 143633d5a7b1SFlorian Westphal 143733d5a7b1SFlorian Westphal void nft_trace_init(struct nft_traceinfo *info, const struct nft_pktinfo *pkt, 143833d5a7b1SFlorian Westphal const struct nft_chain *basechain); 143933d5a7b1SFlorian Westphal 1440698bb828SFlorian Westphal void nft_trace_notify(const struct nft_pktinfo *pkt, 14410a202145SFlorian Westphal const struct nft_verdict *verdict, 144246df4175SFlorian Westphal const struct nft_rule_dp *rule, 1443698bb828SFlorian Westphal struct nft_traceinfo *info); 144433d5a7b1SFlorian Westphal 14459370761cSPablo Neira Ayuso #define MODULE_ALIAS_NFT_CHAIN(family, name) \ 14469370761cSPablo Neira Ayuso MODULE_ALIAS("nft-chain-" __stringify(family) "-" name) 144796518518SPatrick McHardy 144864d46806SPatrick McHardy #define MODULE_ALIAS_NFT_AF_EXPR(family, name) \ 144964d46806SPatrick McHardy MODULE_ALIAS("nft-expr-" __stringify(family) "-" name) 145064d46806SPatrick McHardy 145196518518SPatrick McHardy #define MODULE_ALIAS_NFT_EXPR(name) \ 145296518518SPatrick McHardy MODULE_ALIAS("nft-expr-" name) 145396518518SPatrick McHardy 1454e5009240SPablo Neira Ayuso #define MODULE_ALIAS_NFT_OBJ(type) \ 1455e5009240SPablo Neira Ayuso MODULE_ALIAS("nft-obj-" __stringify(type)) 1456e5009240SPablo Neira Ayuso 145747e640afSJeremy Sowden #if IS_ENABLED(CONFIG_NF_TABLES) 145847e640afSJeremy Sowden 1459ea4bd995SPatrick McHardy /* 1460ea4bd995SPatrick McHardy * The gencursor defines two generations, the currently active and the 1461ea4bd995SPatrick McHardy * next one. Objects contain a bitmask of 2 bits specifying the generations 1462ea4bd995SPatrick McHardy * they're active in. A set bit means they're inactive in the generation 1463ea4bd995SPatrick McHardy * represented by that bit. 1464ea4bd995SPatrick McHardy * 1465ea4bd995SPatrick McHardy * New objects start out as inactive in the current and active in the 1466ea4bd995SPatrick McHardy * next generation. When committing the ruleset the bitmask is cleared, 1467ea4bd995SPatrick McHardy * meaning they're active in all generations. When removing an object, 1468ea4bd995SPatrick McHardy * it is set inactive in the next generation. After committing the ruleset, 1469ea4bd995SPatrick McHardy * the objects are removed. 1470ea4bd995SPatrick McHardy */ 1471ea4bd995SPatrick McHardy static inline unsigned int nft_gencursor_next(const struct net *net) 1472ea4bd995SPatrick McHardy { 1473ea4bd995SPatrick McHardy return net->nft.gencursor + 1 == 1 ? 1 : 0; 1474ea4bd995SPatrick McHardy } 1475ea4bd995SPatrick McHardy 1476ea4bd995SPatrick McHardy static inline u8 nft_genmask_next(const struct net *net) 1477ea4bd995SPatrick McHardy { 1478ea4bd995SPatrick McHardy return 1 << nft_gencursor_next(net); 1479ea4bd995SPatrick McHardy } 1480ea4bd995SPatrick McHardy 1481ea4bd995SPatrick McHardy static inline u8 nft_genmask_cur(const struct net *net) 1482ea4bd995SPatrick McHardy { 148314cd5d4aSMark Rutland /* Use READ_ONCE() to prevent refetching the value for atomicity */ 148414cd5d4aSMark Rutland return 1 << READ_ONCE(net->nft.gencursor); 1485ea4bd995SPatrick McHardy } 1486ea4bd995SPatrick McHardy 148722fe54d5SPatrick McHardy #define NFT_GENMASK_ANY ((1 << 0) | (1 << 1)) 148822fe54d5SPatrick McHardy 1489cc02e457SPatrick McHardy /* 1490889f7ee7SPablo Neira Ayuso * Generic transaction helpers 1491889f7ee7SPablo Neira Ayuso */ 1492889f7ee7SPablo Neira Ayuso 1493889f7ee7SPablo Neira Ayuso /* Check if this object is currently active. */ 1494889f7ee7SPablo Neira Ayuso #define nft_is_active(__net, __obj) \ 1495889f7ee7SPablo Neira Ayuso (((__obj)->genmask & nft_genmask_cur(__net)) == 0) 1496889f7ee7SPablo Neira Ayuso 1497889f7ee7SPablo Neira Ayuso /* Check if this object is active in the next generation. */ 1498889f7ee7SPablo Neira Ayuso #define nft_is_active_next(__net, __obj) \ 1499889f7ee7SPablo Neira Ayuso (((__obj)->genmask & nft_genmask_next(__net)) == 0) 1500889f7ee7SPablo Neira Ayuso 1501889f7ee7SPablo Neira Ayuso /* This object becomes active in the next generation. */ 1502889f7ee7SPablo Neira Ayuso #define nft_activate_next(__net, __obj) \ 1503889f7ee7SPablo Neira Ayuso (__obj)->genmask = nft_genmask_cur(__net) 1504889f7ee7SPablo Neira Ayuso 1505889f7ee7SPablo Neira Ayuso /* This object becomes inactive in the next generation. */ 1506889f7ee7SPablo Neira Ayuso #define nft_deactivate_next(__net, __obj) \ 1507889f7ee7SPablo Neira Ayuso (__obj)->genmask = nft_genmask_next(__net) 1508889f7ee7SPablo Neira Ayuso 1509889f7ee7SPablo Neira Ayuso /* After committing the ruleset, clear the stale generation bit. */ 1510889f7ee7SPablo Neira Ayuso #define nft_clear(__net, __obj) \ 1511889f7ee7SPablo Neira Ayuso (__obj)->genmask &= ~nft_genmask_next(__net) 1512f2a6d766SPablo Neira Ayuso #define nft_active_genmask(__obj, __genmask) \ 1513f2a6d766SPablo Neira Ayuso !((__obj)->genmask & __genmask) 1514889f7ee7SPablo Neira Ayuso 1515889f7ee7SPablo Neira Ayuso /* 1516cc02e457SPatrick McHardy * Set element transaction helpers 1517cc02e457SPatrick McHardy */ 1518cc02e457SPatrick McHardy 1519cc02e457SPatrick McHardy static inline bool nft_set_elem_active(const struct nft_set_ext *ext, 1520cc02e457SPatrick McHardy u8 genmask) 1521cc02e457SPatrick McHardy { 1522cc02e457SPatrick McHardy return !(ext->genmask & genmask); 1523cc02e457SPatrick McHardy } 1524cc02e457SPatrick McHardy 152542a55769SPablo Neira Ayuso static inline void nft_set_elem_change_active(const struct net *net, 152642a55769SPablo Neira Ayuso const struct nft_set *set, 1527cc02e457SPatrick McHardy struct nft_set_ext *ext) 1528cc02e457SPatrick McHardy { 152942a55769SPablo Neira Ayuso ext->genmask ^= nft_genmask_next(net); 1530cc02e457SPatrick McHardy } 1531cc02e457SPatrick McHardy 153247e640afSJeremy Sowden #endif /* IS_ENABLED(CONFIG_NF_TABLES) */ 153347e640afSJeremy Sowden 153469086658SPatrick McHardy /* 153569086658SPatrick McHardy * We use a free bit in the genmask field to indicate the element 153669086658SPatrick McHardy * is busy, meaning it is currently being processed either by 153769086658SPatrick McHardy * the netlink API or GC. 153869086658SPatrick McHardy * 153969086658SPatrick McHardy * Even though the genmask is only a single byte wide, this works 154069086658SPatrick McHardy * because the extension structure if fully constant once initialized, 154169086658SPatrick McHardy * so there are no non-atomic write accesses unless it is already 154269086658SPatrick McHardy * marked busy. 154369086658SPatrick McHardy */ 154469086658SPatrick McHardy #define NFT_SET_ELEM_BUSY_MASK (1 << 2) 154569086658SPatrick McHardy 154669086658SPatrick McHardy #if defined(__LITTLE_ENDIAN_BITFIELD) 154769086658SPatrick McHardy #define NFT_SET_ELEM_BUSY_BIT 2 154869086658SPatrick McHardy #elif defined(__BIG_ENDIAN_BITFIELD) 154969086658SPatrick McHardy #define NFT_SET_ELEM_BUSY_BIT (BITS_PER_LONG - BITS_PER_BYTE + 2) 155069086658SPatrick McHardy #else 155169086658SPatrick McHardy #error 155269086658SPatrick McHardy #endif 155369086658SPatrick McHardy 155469086658SPatrick McHardy static inline int nft_set_elem_mark_busy(struct nft_set_ext *ext) 155569086658SPatrick McHardy { 155669086658SPatrick McHardy unsigned long *word = (unsigned long *)ext; 155769086658SPatrick McHardy 155869086658SPatrick McHardy BUILD_BUG_ON(offsetof(struct nft_set_ext, genmask) != 0); 155969086658SPatrick McHardy return test_and_set_bit(NFT_SET_ELEM_BUSY_BIT, word); 156069086658SPatrick McHardy } 156169086658SPatrick McHardy 156269086658SPatrick McHardy static inline void nft_set_elem_clear_busy(struct nft_set_ext *ext) 156369086658SPatrick McHardy { 156469086658SPatrick McHardy unsigned long *word = (unsigned long *)ext; 156569086658SPatrick McHardy 156669086658SPatrick McHardy clear_bit(NFT_SET_ELEM_BUSY_BIT, word); 156769086658SPatrick McHardy } 156869086658SPatrick McHardy 15691a1e1a12SPatrick McHardy /** 15701a1e1a12SPatrick McHardy * struct nft_trans - nf_tables object update in transaction 15711a1e1a12SPatrick McHardy * 15721a1e1a12SPatrick McHardy * @list: used internally 15731a1e1a12SPatrick McHardy * @msg_type: message type 15740935d558SFlorian Westphal * @put_net: ctx->net needs to be put 15751a1e1a12SPatrick McHardy * @ctx: transaction context 15761a1e1a12SPatrick McHardy * @data: internal information related to the transaction 15771a1e1a12SPatrick McHardy */ 15781a1e1a12SPatrick McHardy struct nft_trans { 15791a1e1a12SPatrick McHardy struct list_head list; 15801a1e1a12SPatrick McHardy int msg_type; 15810935d558SFlorian Westphal bool put_net; 15821a1e1a12SPatrick McHardy struct nft_ctx ctx; 15836daf1414SGustavo A. R. Silva char data[]; 15841a1e1a12SPatrick McHardy }; 15851a1e1a12SPatrick McHardy 15861a1e1a12SPatrick McHardy struct nft_trans_rule { 15871a1e1a12SPatrick McHardy struct nft_rule *rule; 1588c9626a2cSPablo Neira Ayuso struct nft_flow_rule *flow; 15891a94e38dSPablo Neira Ayuso u32 rule_id; 15904bedf9eeSPablo Neira Ayuso bool bound; 15911a1e1a12SPatrick McHardy }; 15921a1e1a12SPatrick McHardy 15931a1e1a12SPatrick McHardy #define nft_trans_rule(trans) \ 15941a1e1a12SPatrick McHardy (((struct nft_trans_rule *)trans->data)->rule) 1595c9626a2cSPablo Neira Ayuso #define nft_trans_flow_rule(trans) \ 1596c9626a2cSPablo Neira Ayuso (((struct nft_trans_rule *)trans->data)->flow) 15971a94e38dSPablo Neira Ayuso #define nft_trans_rule_id(trans) \ 15981a94e38dSPablo Neira Ayuso (((struct nft_trans_rule *)trans->data)->rule_id) 15994bedf9eeSPablo Neira Ayuso #define nft_trans_rule_bound(trans) \ 16004bedf9eeSPablo Neira Ayuso (((struct nft_trans_rule *)trans->data)->bound) 16011a1e1a12SPatrick McHardy 16021a1e1a12SPatrick McHardy struct nft_trans_set { 16031a1e1a12SPatrick McHardy struct nft_set *set; 16041a1e1a12SPatrick McHardy u32 set_id; 1605123b9961SPablo Neira Ayuso u32 gc_int; 1606123b9961SPablo Neira Ayuso u64 timeout; 1607123b9961SPablo Neira Ayuso bool update; 16086a0a8d10SPablo Neira Ayuso bool bound; 16091a1e1a12SPatrick McHardy }; 16101a1e1a12SPatrick McHardy 16111a1e1a12SPatrick McHardy #define nft_trans_set(trans) \ 16121a1e1a12SPatrick McHardy (((struct nft_trans_set *)trans->data)->set) 16131a1e1a12SPatrick McHardy #define nft_trans_set_id(trans) \ 16141a1e1a12SPatrick McHardy (((struct nft_trans_set *)trans->data)->set_id) 16156a0a8d10SPablo Neira Ayuso #define nft_trans_set_bound(trans) \ 16166a0a8d10SPablo Neira Ayuso (((struct nft_trans_set *)trans->data)->bound) 1617123b9961SPablo Neira Ayuso #define nft_trans_set_update(trans) \ 1618123b9961SPablo Neira Ayuso (((struct nft_trans_set *)trans->data)->update) 1619123b9961SPablo Neira Ayuso #define nft_trans_set_timeout(trans) \ 1620123b9961SPablo Neira Ayuso (((struct nft_trans_set *)trans->data)->timeout) 1621123b9961SPablo Neira Ayuso #define nft_trans_set_gc_int(trans) \ 1622123b9961SPablo Neira Ayuso (((struct nft_trans_set *)trans->data)->gc_int) 16231a1e1a12SPatrick McHardy 16241a1e1a12SPatrick McHardy struct nft_trans_chain { 16254bedf9eeSPablo Neira Ayuso struct nft_chain *chain; 16261a1e1a12SPatrick McHardy bool update; 1627b7263e07SPhil Sutter char *name; 16281a1e1a12SPatrick McHardy struct nft_stats __percpu *stats; 16291a1e1a12SPatrick McHardy u8 policy; 16304bedf9eeSPablo Neira Ayuso bool bound; 163174cccc3dSPablo Neira Ayuso u32 chain_id; 1632b9703ed4SPablo Neira Ayuso struct nft_base_chain *basechain; 1633b9703ed4SPablo Neira Ayuso struct list_head hook_list; 16341a1e1a12SPatrick McHardy }; 16351a1e1a12SPatrick McHardy 16364bedf9eeSPablo Neira Ayuso #define nft_trans_chain(trans) \ 16374bedf9eeSPablo Neira Ayuso (((struct nft_trans_chain *)trans->data)->chain) 16381a1e1a12SPatrick McHardy #define nft_trans_chain_update(trans) \ 16391a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->update) 16401a1e1a12SPatrick McHardy #define nft_trans_chain_name(trans) \ 16411a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->name) 16421a1e1a12SPatrick McHardy #define nft_trans_chain_stats(trans) \ 16431a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->stats) 16441a1e1a12SPatrick McHardy #define nft_trans_chain_policy(trans) \ 16451a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->policy) 16464bedf9eeSPablo Neira Ayuso #define nft_trans_chain_bound(trans) \ 16474bedf9eeSPablo Neira Ayuso (((struct nft_trans_chain *)trans->data)->bound) 164874cccc3dSPablo Neira Ayuso #define nft_trans_chain_id(trans) \ 164974cccc3dSPablo Neira Ayuso (((struct nft_trans_chain *)trans->data)->chain_id) 1650b9703ed4SPablo Neira Ayuso #define nft_trans_basechain(trans) \ 1651b9703ed4SPablo Neira Ayuso (((struct nft_trans_chain *)trans->data)->basechain) 1652b9703ed4SPablo Neira Ayuso #define nft_trans_chain_hooks(trans) \ 1653b9703ed4SPablo Neira Ayuso (((struct nft_trans_chain *)trans->data)->hook_list) 16541a1e1a12SPatrick McHardy 16551a1e1a12SPatrick McHardy struct nft_trans_table { 16561a1e1a12SPatrick McHardy bool update; 16571a1e1a12SPatrick McHardy }; 16581a1e1a12SPatrick McHardy 16591a1e1a12SPatrick McHardy #define nft_trans_table_update(trans) \ 16601a1e1a12SPatrick McHardy (((struct nft_trans_table *)trans->data)->update) 16611a1e1a12SPatrick McHardy 16621a1e1a12SPatrick McHardy struct nft_trans_elem { 16631a1e1a12SPatrick McHardy struct nft_set *set; 16641a1e1a12SPatrick McHardy struct nft_set_elem elem; 16656a0a8d10SPablo Neira Ayuso bool bound; 16661a1e1a12SPatrick McHardy }; 16671a1e1a12SPatrick McHardy 16681a1e1a12SPatrick McHardy #define nft_trans_elem_set(trans) \ 16691a1e1a12SPatrick McHardy (((struct nft_trans_elem *)trans->data)->set) 16701a1e1a12SPatrick McHardy #define nft_trans_elem(trans) \ 16711a1e1a12SPatrick McHardy (((struct nft_trans_elem *)trans->data)->elem) 16726a0a8d10SPablo Neira Ayuso #define nft_trans_elem_set_bound(trans) \ 16736a0a8d10SPablo Neira Ayuso (((struct nft_trans_elem *)trans->data)->bound) 16741a1e1a12SPatrick McHardy 1675e5009240SPablo Neira Ayuso struct nft_trans_obj { 1676e5009240SPablo Neira Ayuso struct nft_object *obj; 1677d62d0ba9SFernando Fernandez Mancera struct nft_object *newobj; 1678d62d0ba9SFernando Fernandez Mancera bool update; 1679e5009240SPablo Neira Ayuso }; 1680e5009240SPablo Neira Ayuso 1681e5009240SPablo Neira Ayuso #define nft_trans_obj(trans) \ 1682e5009240SPablo Neira Ayuso (((struct nft_trans_obj *)trans->data)->obj) 1683d62d0ba9SFernando Fernandez Mancera #define nft_trans_obj_newobj(trans) \ 1684d62d0ba9SFernando Fernandez Mancera (((struct nft_trans_obj *)trans->data)->newobj) 1685d62d0ba9SFernando Fernandez Mancera #define nft_trans_obj_update(trans) \ 1686d62d0ba9SFernando Fernandez Mancera (((struct nft_trans_obj *)trans->data)->update) 1687e5009240SPablo Neira Ayuso 16883b49e2e9SPablo Neira Ayuso struct nft_trans_flowtable { 16893b49e2e9SPablo Neira Ayuso struct nft_flowtable *flowtable; 169078d9f48fSPablo Neira Ayuso bool update; 169178d9f48fSPablo Neira Ayuso struct list_head hook_list; 16927b35582cSPablo Neira Ayuso u32 flags; 16933b49e2e9SPablo Neira Ayuso }; 16943b49e2e9SPablo Neira Ayuso 16953b49e2e9SPablo Neira Ayuso #define nft_trans_flowtable(trans) \ 16963b49e2e9SPablo Neira Ayuso (((struct nft_trans_flowtable *)trans->data)->flowtable) 169778d9f48fSPablo Neira Ayuso #define nft_trans_flowtable_update(trans) \ 169878d9f48fSPablo Neira Ayuso (((struct nft_trans_flowtable *)trans->data)->update) 169978d9f48fSPablo Neira Ayuso #define nft_trans_flowtable_hooks(trans) \ 170078d9f48fSPablo Neira Ayuso (((struct nft_trans_flowtable *)trans->data)->hook_list) 17017b35582cSPablo Neira Ayuso #define nft_trans_flowtable_flags(trans) \ 17027b35582cSPablo Neira Ayuso (((struct nft_trans_flowtable *)trans->data)->flags) 17033b49e2e9SPablo Neira Ayuso 170402c7b25eSPablo Neira Ayuso int __init nft_chain_filter_init(void); 1705d209df3eSFlorian Westphal void nft_chain_filter_fini(void); 170602c7b25eSPablo Neira Ayuso 1707c1deb065SFlorian Westphal void __init nft_chain_route_init(void); 1708c1deb065SFlorian Westphal void nft_chain_route_fini(void); 1709ffe8923fSFlorian Westphal 1710ffe8923fSFlorian Westphal void nf_tables_trans_destroy_flush_work(void); 1711917d80d3SPablo Neira Ayuso 1712917d80d3SPablo Neira Ayuso int nf_msecs_to_jiffies64(const struct nlattr *nla, u64 *result); 1713917d80d3SPablo Neira Ayuso __be64 nf_jiffies64_to_msecs(u64 input); 1714917d80d3SPablo Neira Ayuso 1715cefa31a9SFlorian Westphal #ifdef CONFIG_MODULES 1716cefa31a9SFlorian Westphal __printf(2, 3) int nft_request_module(struct net *net, const char *fmt, ...); 1717cefa31a9SFlorian Westphal #else 1718cefa31a9SFlorian Westphal static inline int nft_request_module(struct net *net, const char *fmt, ...) { return -ENOENT; } 1719cefa31a9SFlorian Westphal #endif 17200854db2aSFlorian Westphal 17210854db2aSFlorian Westphal struct nftables_pernet { 17220854db2aSFlorian Westphal struct list_head tables; 17230854db2aSFlorian Westphal struct list_head commit_list; 17240854db2aSFlorian Westphal struct list_head module_list; 17250854db2aSFlorian Westphal struct list_head notify_list; 17260854db2aSFlorian Westphal struct mutex commit_mutex; 1727ab482c6bSPablo Neira Ayuso u64 table_handle; 17280854db2aSFlorian Westphal unsigned int base_seq; 17290854db2aSFlorian Westphal }; 17300854db2aSFlorian Westphal 1731d59d2f82SPablo Neira Ayuso extern unsigned int nf_tables_net_id; 1732d59d2f82SPablo Neira Ayuso 1733d59d2f82SPablo Neira Ayuso static inline struct nftables_pernet *nft_pernet(const struct net *net) 1734d59d2f82SPablo Neira Ayuso { 1735d59d2f82SPablo Neira Ayuso return net_generic(net, nf_tables_net_id); 1736d59d2f82SPablo Neira Ayuso } 1737d59d2f82SPablo Neira Ayuso 1738b2d30654SPablo Neira Ayuso #define __NFT_REDUCE_READONLY 1UL 1739b2d30654SPablo Neira Ayuso #define NFT_REDUCE_READONLY (void *)__NFT_REDUCE_READONLY 1740b2d30654SPablo Neira Ayuso 1741b2d30654SPablo Neira Ayuso static inline bool nft_reduce_is_readonly(const struct nft_expr *expr) 1742b2d30654SPablo Neira Ayuso { 1743b2d30654SPablo Neira Ayuso return expr->ops->reduce == NFT_REDUCE_READONLY; 1744b2d30654SPablo Neira Ayuso } 1745b2d30654SPablo Neira Ayuso 174634cc9e52SPablo Neira Ayuso void nft_reg_track_update(struct nft_regs_track *track, 174734cc9e52SPablo Neira Ayuso const struct nft_expr *expr, u8 dreg, u8 len); 174834cc9e52SPablo Neira Ayuso void nft_reg_track_cancel(struct nft_regs_track *track, u8 dreg, u8 len); 174934cc9e52SPablo Neira Ayuso void __nft_reg_track_cancel(struct nft_regs_track *track, u8 dreg); 175034cc9e52SPablo Neira Ayuso 175134cc9e52SPablo Neira Ayuso static inline bool nft_reg_track_cmp(struct nft_regs_track *track, 175234cc9e52SPablo Neira Ayuso const struct nft_expr *expr, u8 dreg) 175334cc9e52SPablo Neira Ayuso { 175434cc9e52SPablo Neira Ayuso return track->regs[dreg].selector && 175534cc9e52SPablo Neira Ayuso track->regs[dreg].selector->ops == expr->ops && 175634cc9e52SPablo Neira Ayuso track->regs[dreg].num_reg == 0; 175734cc9e52SPablo Neira Ayuso } 175834cc9e52SPablo Neira Ayuso 175996518518SPatrick McHardy #endif /* _NET_NF_TABLES_H */ 1760