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[]); 475628bd3e4SPablo Neira Ayuso void (*destroy)(const struct nft_ctx *ctx, 476628bd3e4SPablo Neira Ayuso const struct nft_set *set); 47779b174adSPablo Neira Ayuso void (*gc_init)(const struct nft_set *set); 47820a69341SPatrick McHardy 479fe2811ebSPatrick McHardy unsigned int elemsize; 48020a69341SPatrick McHardy }; 48120a69341SPatrick McHardy 48271cc0873SPhil Sutter /** 48371cc0873SPhil Sutter * struct nft_set_type - nf_tables set type 48471cc0873SPhil Sutter * 48571cc0873SPhil Sutter * @ops: set ops for this type 48671cc0873SPhil Sutter * @features: features supported by the implementation 48771cc0873SPhil Sutter */ 48871cc0873SPhil Sutter struct nft_set_type { 48971cc0873SPhil Sutter const struct nft_set_ops ops; 49071cc0873SPhil Sutter u32 features; 49171cc0873SPhil Sutter }; 49271cc0873SPhil Sutter #define to_set_type(o) container_of(o, struct nft_set_type, ops) 49371cc0873SPhil Sutter 494563125a7SPablo Neira Ayuso struct nft_set_elem_expr { 495563125a7SPablo Neira Ayuso u8 size; 496563125a7SPablo Neira Ayuso unsigned char data[] 497563125a7SPablo Neira Ayuso __attribute__((aligned(__alignof__(struct nft_expr)))); 498563125a7SPablo Neira Ayuso }; 499563125a7SPablo Neira Ayuso 500563125a7SPablo Neira Ayuso #define nft_setelem_expr_at(__elem_expr, __offset) \ 501563125a7SPablo Neira Ayuso ((struct nft_expr *)&__elem_expr->data[__offset]) 502563125a7SPablo Neira Ayuso 503563125a7SPablo Neira Ayuso #define nft_setelem_expr_foreach(__expr, __elem_expr, __size) \ 504563125a7SPablo Neira Ayuso for (__expr = nft_setelem_expr_at(__elem_expr, 0), __size = 0; \ 505563125a7SPablo Neira Ayuso __size < (__elem_expr)->size; \ 506563125a7SPablo Neira Ayuso __size += (__expr)->ops->size, __expr = ((void *)(__expr)) + (__expr)->ops->size) 507563125a7SPablo Neira Ayuso 5088cfd9b0fSPablo Neira Ayuso #define NFT_SET_EXPR_MAX 2 5098cfd9b0fSPablo Neira Ayuso 51020a69341SPatrick McHardy /** 51120a69341SPatrick McHardy * struct nft_set - nf_tables set instance 51220a69341SPatrick McHardy * 51320a69341SPatrick McHardy * @list: table set list node 51420a69341SPatrick McHardy * @bindings: list of set bindings 5155f68718bSPablo Neira Ayuso * @refs: internal refcounting for async set destruction 5163453c927SPablo Neira Ayuso * @table: table this set belongs to 5173453c927SPablo Neira Ayuso * @net: netnamespace this set belongs to 51820a69341SPatrick McHardy * @name: name of the set 5193ecbfd65SHarsha Sharma * @handle: unique handle of the set 52020a69341SPatrick McHardy * @ktype: key type (numeric type defined by userspace, not used in the kernel) 52120a69341SPatrick McHardy * @dtype: data type (verdict or numeric type defined by userspace) 5228aeff920SPablo Neira Ayuso * @objtype: object type (see NFT_OBJECT_* definitions) 523c50b960cSPatrick McHardy * @size: maximum set size 524f3a2181eSStefano Brivio * @field_len: length of each field in concatenation, bytes 525f3a2181eSStefano Brivio * @field_count: number of concatenated fields in element 526273fe3f1SPablo Neira Ayuso * @use: number of rules references to this set 527c50b960cSPatrick McHardy * @nelems: number of elements 5283dd0673aSPatrick McHardy * @ndeact: number of deactivated elements queued for removal 529d3e2a111SAnders K. Pedersen * @timeout: default timeout value in jiffies 530761da293SPatrick McHardy * @gc_int: garbage collection interval in msecs 5319363dc4bSArturo Borrero * @policy: set parameterization (see enum nft_set_policies) 532e6d8ecacSCarlos Falgueras García * @udlen: user data length 533e6d8ecacSCarlos Falgueras García * @udata: user data 53465038428SPablo Neira Ayuso * @expr: stateful expression 53520a69341SPatrick McHardy * @ops: set ops 53620a69341SPatrick McHardy * @flags: set flags 53708713cb0SFlorian Westphal * @dead: set will be freed, never cleared 53837a9cc52SPablo Neira Ayuso * @genmask: generation mask 53920a69341SPatrick McHardy * @klen: key length 54020a69341SPatrick McHardy * @dlen: data length 54120a69341SPatrick McHardy * @data: private set data 54220a69341SPatrick McHardy */ 54320a69341SPatrick McHardy struct nft_set { 54420a69341SPatrick McHardy struct list_head list; 54520a69341SPatrick McHardy struct list_head bindings; 5465f68718bSPablo Neira Ayuso refcount_t refs; 5473453c927SPablo Neira Ayuso struct nft_table *table; 5483453c927SPablo Neira Ayuso possible_net_t net; 54938745490SPhil Sutter char *name; 5503ecbfd65SHarsha Sharma u64 handle; 55120a69341SPatrick McHardy u32 ktype; 55220a69341SPatrick McHardy u32 dtype; 5538aeff920SPablo Neira Ayuso u32 objtype; 554c50b960cSPatrick McHardy u32 size; 555f3a2181eSStefano Brivio u8 field_len[NFT_REG32_COUNT]; 556f3a2181eSStefano Brivio u8 field_count; 557273fe3f1SPablo Neira Ayuso u32 use; 5583dd0673aSPatrick McHardy atomic_t nelems; 5593dd0673aSPatrick McHardy u32 ndeact; 560761da293SPatrick McHardy u64 timeout; 561761da293SPatrick McHardy u32 gc_int; 5629363dc4bSArturo Borrero u16 policy; 563e6d8ecacSCarlos Falgueras García u16 udlen; 564e6d8ecacSCarlos Falgueras García unsigned char *udata; 565212ed75dSPablo Neira Ayuso struct list_head pending_update; 56620a69341SPatrick McHardy /* runtime data below here */ 56720a69341SPatrick McHardy const struct nft_set_ops *ops ____cacheline_aligned; 5685f68718bSPablo Neira Ayuso u16 flags:13, 5695f68718bSPablo Neira Ayuso dead:1, 57037a9cc52SPablo Neira Ayuso genmask:2; 57120a69341SPatrick McHardy u8 klen; 57220a69341SPatrick McHardy u8 dlen; 5738cfd9b0fSPablo Neira Ayuso u8 num_exprs; 5748cfd9b0fSPablo Neira Ayuso struct nft_expr *exprs[NFT_SET_EXPR_MAX]; 575aaa31047SPablo Neira Ayuso struct list_head catchall_list; 57620a69341SPatrick McHardy unsigned char data[] 57720a69341SPatrick McHardy __attribute__((aligned(__alignof__(u64)))); 57820a69341SPatrick McHardy }; 57920a69341SPatrick McHardy 580408070d6SPablo Neira Ayuso static inline bool nft_set_is_anonymous(const struct nft_set *set) 581408070d6SPablo Neira Ayuso { 582408070d6SPablo Neira Ayuso return set->flags & NFT_SET_ANONYMOUS; 583408070d6SPablo Neira Ayuso } 584408070d6SPablo Neira Ayuso 58520a69341SPatrick McHardy static inline void *nft_set_priv(const struct nft_set *set) 58620a69341SPatrick McHardy { 58720a69341SPatrick McHardy return (void *)set->data; 58820a69341SPatrick McHardy } 58920a69341SPatrick McHardy 590*8e51830eSFlorian Westphal static inline bool nft_set_gc_is_pending(const struct nft_set *s) 591*8e51830eSFlorian Westphal { 592*8e51830eSFlorian Westphal return refcount_read(&s->refs) != 1; 593*8e51830eSFlorian Westphal } 594*8e51830eSFlorian Westphal 5959d098292SPatrick McHardy static inline struct nft_set *nft_set_container_of(const void *priv) 5969d098292SPatrick McHardy { 5979d098292SPatrick McHardy return (void *)priv - offsetof(struct nft_set, data); 5989d098292SPatrick McHardy } 5999d098292SPatrick McHardy 60010659cbaSPablo Neira Ayuso struct nft_set *nft_set_lookup_global(const struct net *net, 601c7a72e3fSPablo Neira Ayuso const struct nft_table *table, 602c7a72e3fSPablo Neira Ayuso const struct nlattr *nla_set_name, 603c7a72e3fSPablo Neira Ayuso const struct nlattr *nla_set_id, 604c7a72e3fSPablo Neira Ayuso u8 genmask); 60520a69341SPatrick McHardy 606aaa31047SPablo Neira Ayuso struct nft_set_ext *nft_set_catchall_lookup(const struct net *net, 607aaa31047SPablo Neira Ayuso const struct nft_set *set); 608aaa31047SPablo Neira Ayuso 609761da293SPatrick McHardy static inline unsigned long nft_set_gc_interval(const struct nft_set *set) 610761da293SPatrick McHardy { 611123b9961SPablo Neira Ayuso u32 gc_int = READ_ONCE(set->gc_int); 612123b9961SPablo Neira Ayuso 613123b9961SPablo Neira Ayuso return gc_int ? msecs_to_jiffies(gc_int) : HZ; 614761da293SPatrick McHardy } 615761da293SPatrick McHardy 61620a69341SPatrick McHardy /** 61720a69341SPatrick McHardy * struct nft_set_binding - nf_tables set binding 61820a69341SPatrick McHardy * 61920a69341SPatrick McHardy * @list: set bindings list node 62020a69341SPatrick McHardy * @chain: chain containing the rule bound to the set 62111113e19SPatrick McHardy * @flags: set action flags 62220a69341SPatrick McHardy * 62320a69341SPatrick McHardy * A set binding contains all information necessary for validation 62420a69341SPatrick McHardy * of new elements added to a bound set. 62520a69341SPatrick McHardy */ 62620a69341SPatrick McHardy struct nft_set_binding { 62720a69341SPatrick McHardy struct list_head list; 62820a69341SPatrick McHardy const struct nft_chain *chain; 62911113e19SPatrick McHardy u32 flags; 63020a69341SPatrick McHardy }; 63120a69341SPatrick McHardy 632273fe3f1SPablo Neira Ayuso enum nft_trans_phase; 633c1592a89SPablo Neira Ayuso void nf_tables_activate_set(const struct nft_ctx *ctx, struct nft_set *set); 634273fe3f1SPablo Neira Ayuso void nf_tables_deactivate_set(const struct nft_ctx *ctx, struct nft_set *set, 635273fe3f1SPablo Neira Ayuso struct nft_set_binding *binding, 636273fe3f1SPablo Neira Ayuso enum nft_trans_phase phase); 6375eccdfaaSJoe Perches int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set, 63820a69341SPatrick McHardy struct nft_set_binding *binding); 639cd5125d8SFlorian Westphal void nf_tables_destroy_set(const struct nft_ctx *ctx, struct nft_set *set); 64020a69341SPatrick McHardy 6413ac4c07aSPatrick McHardy /** 6423ac4c07aSPatrick McHardy * enum nft_set_extensions - set extension type IDs 6433ac4c07aSPatrick McHardy * 6443ac4c07aSPatrick McHardy * @NFT_SET_EXT_KEY: element key 6457b225d0bSPablo Neira Ayuso * @NFT_SET_EXT_KEY_END: upper bound element key, for ranges 6463ac4c07aSPatrick McHardy * @NFT_SET_EXT_DATA: mapping data 6473ac4c07aSPatrick McHardy * @NFT_SET_EXT_FLAGS: element flags 648c3e1b005SPatrick McHardy * @NFT_SET_EXT_TIMEOUT: element timeout 649c3e1b005SPatrick McHardy * @NFT_SET_EXT_EXPIRATION: element expiration time 65068e942e8SPatrick McHardy * @NFT_SET_EXT_USERDATA: user data associated with the element 651563125a7SPablo Neira Ayuso * @NFT_SET_EXT_EXPRESSIONS: expressions assiciated with the element 6528aeff920SPablo Neira Ayuso * @NFT_SET_EXT_OBJREF: stateful object reference associated with element 6533ac4c07aSPatrick McHardy * @NFT_SET_EXT_NUM: number of extension types 6543ac4c07aSPatrick McHardy */ 6553ac4c07aSPatrick McHardy enum nft_set_extensions { 6563ac4c07aSPatrick McHardy NFT_SET_EXT_KEY, 6577b225d0bSPablo Neira Ayuso NFT_SET_EXT_KEY_END, 6583ac4c07aSPatrick McHardy NFT_SET_EXT_DATA, 6593ac4c07aSPatrick McHardy NFT_SET_EXT_FLAGS, 660c3e1b005SPatrick McHardy NFT_SET_EXT_TIMEOUT, 661c3e1b005SPatrick McHardy NFT_SET_EXT_EXPIRATION, 66268e942e8SPatrick McHardy NFT_SET_EXT_USERDATA, 663563125a7SPablo Neira Ayuso NFT_SET_EXT_EXPRESSIONS, 6648aeff920SPablo Neira Ayuso NFT_SET_EXT_OBJREF, 6653ac4c07aSPatrick McHardy NFT_SET_EXT_NUM 6663ac4c07aSPatrick McHardy }; 6673ac4c07aSPatrick McHardy 6683ac4c07aSPatrick McHardy /** 6693ac4c07aSPatrick McHardy * struct nft_set_ext_type - set extension type 6703ac4c07aSPatrick McHardy * 6713ac4c07aSPatrick McHardy * @len: fixed part length of the extension 6723ac4c07aSPatrick McHardy * @align: alignment requirements of the extension 6733ac4c07aSPatrick McHardy */ 6743ac4c07aSPatrick McHardy struct nft_set_ext_type { 6753ac4c07aSPatrick McHardy u8 len; 6763ac4c07aSPatrick McHardy u8 align; 6773ac4c07aSPatrick McHardy }; 6783ac4c07aSPatrick McHardy 6793ac4c07aSPatrick McHardy extern const struct nft_set_ext_type nft_set_ext_types[]; 6803ac4c07aSPatrick McHardy 6813ac4c07aSPatrick McHardy /** 6823ac4c07aSPatrick McHardy * struct nft_set_ext_tmpl - set extension template 6833ac4c07aSPatrick McHardy * 6843ac4c07aSPatrick McHardy * @len: length of extension area 6853ac4c07aSPatrick McHardy * @offset: offsets of individual extension types 6863ac4c07aSPatrick McHardy */ 6873ac4c07aSPatrick McHardy struct nft_set_ext_tmpl { 6883ac4c07aSPatrick McHardy u16 len; 6893ac4c07aSPatrick McHardy u8 offset[NFT_SET_EXT_NUM]; 69034aae2c2SPablo Neira Ayuso u8 ext_len[NFT_SET_EXT_NUM]; 6913ac4c07aSPatrick McHardy }; 6923ac4c07aSPatrick McHardy 6933ac4c07aSPatrick McHardy /** 6943ac4c07aSPatrick McHardy * struct nft_set_ext - set extensions 6953ac4c07aSPatrick McHardy * 696cc02e457SPatrick McHardy * @genmask: generation mask 6973ac4c07aSPatrick McHardy * @offset: offsets of individual extension types 6983ac4c07aSPatrick McHardy * @data: beginning of extension data 6993ac4c07aSPatrick McHardy */ 7003ac4c07aSPatrick McHardy struct nft_set_ext { 701cc02e457SPatrick McHardy u8 genmask; 7023ac4c07aSPatrick McHardy u8 offset[NFT_SET_EXT_NUM]; 7036daf1414SGustavo A. R. Silva char data[]; 7043ac4c07aSPatrick McHardy }; 7053ac4c07aSPatrick McHardy 7063ac4c07aSPatrick McHardy static inline void nft_set_ext_prepare(struct nft_set_ext_tmpl *tmpl) 7073ac4c07aSPatrick McHardy { 7083ac4c07aSPatrick McHardy memset(tmpl, 0, sizeof(*tmpl)); 7093ac4c07aSPatrick McHardy tmpl->len = sizeof(struct nft_set_ext); 7103ac4c07aSPatrick McHardy } 7113ac4c07aSPatrick McHardy 712c39ba4deSPablo Neira Ayuso static inline int nft_set_ext_add_length(struct nft_set_ext_tmpl *tmpl, u8 id, 7133ac4c07aSPatrick McHardy unsigned int len) 7143ac4c07aSPatrick McHardy { 7153ac4c07aSPatrick McHardy tmpl->len = ALIGN(tmpl->len, nft_set_ext_types[id].align); 716c39ba4deSPablo Neira Ayuso if (tmpl->len > U8_MAX) 717c39ba4deSPablo Neira Ayuso return -EINVAL; 718c39ba4deSPablo Neira Ayuso 7193ac4c07aSPatrick McHardy tmpl->offset[id] = tmpl->len; 72034aae2c2SPablo Neira Ayuso tmpl->ext_len[id] = nft_set_ext_types[id].len + len; 72134aae2c2SPablo Neira Ayuso tmpl->len += tmpl->ext_len[id]; 722c39ba4deSPablo Neira Ayuso 723c39ba4deSPablo Neira Ayuso return 0; 7243ac4c07aSPatrick McHardy } 7253ac4c07aSPatrick McHardy 726c39ba4deSPablo Neira Ayuso static inline int nft_set_ext_add(struct nft_set_ext_tmpl *tmpl, u8 id) 7273ac4c07aSPatrick McHardy { 728c39ba4deSPablo Neira Ayuso return nft_set_ext_add_length(tmpl, id, 0); 7293ac4c07aSPatrick McHardy } 7303ac4c07aSPatrick McHardy 7313ac4c07aSPatrick McHardy static inline void nft_set_ext_init(struct nft_set_ext *ext, 7323ac4c07aSPatrick McHardy const struct nft_set_ext_tmpl *tmpl) 7333ac4c07aSPatrick McHardy { 7343ac4c07aSPatrick McHardy memcpy(ext->offset, tmpl->offset, sizeof(ext->offset)); 7353ac4c07aSPatrick McHardy } 7363ac4c07aSPatrick McHardy 7373ac4c07aSPatrick McHardy static inline bool __nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) 7383ac4c07aSPatrick McHardy { 7393ac4c07aSPatrick McHardy return !!ext->offset[id]; 7403ac4c07aSPatrick McHardy } 7413ac4c07aSPatrick McHardy 7423ac4c07aSPatrick McHardy static inline bool nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) 7433ac4c07aSPatrick McHardy { 7443ac4c07aSPatrick McHardy return ext && __nft_set_ext_exists(ext, id); 7453ac4c07aSPatrick McHardy } 7463ac4c07aSPatrick McHardy 7473ac4c07aSPatrick McHardy static inline void *nft_set_ext(const struct nft_set_ext *ext, u8 id) 7483ac4c07aSPatrick McHardy { 7493ac4c07aSPatrick McHardy return (void *)ext + ext->offset[id]; 7503ac4c07aSPatrick McHardy } 7513ac4c07aSPatrick McHardy 7523ac4c07aSPatrick McHardy static inline struct nft_data *nft_set_ext_key(const struct nft_set_ext *ext) 7533ac4c07aSPatrick McHardy { 7543ac4c07aSPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_KEY); 7553ac4c07aSPatrick McHardy } 7563ac4c07aSPatrick McHardy 7577b225d0bSPablo Neira Ayuso static inline struct nft_data *nft_set_ext_key_end(const struct nft_set_ext *ext) 7587b225d0bSPablo Neira Ayuso { 7597b225d0bSPablo Neira Ayuso return nft_set_ext(ext, NFT_SET_EXT_KEY_END); 7607b225d0bSPablo Neira Ayuso } 7617b225d0bSPablo Neira Ayuso 7623ac4c07aSPatrick McHardy static inline struct nft_data *nft_set_ext_data(const struct nft_set_ext *ext) 7633ac4c07aSPatrick McHardy { 7643ac4c07aSPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_DATA); 7653ac4c07aSPatrick McHardy } 7663ac4c07aSPatrick McHardy 7673ac4c07aSPatrick McHardy static inline u8 *nft_set_ext_flags(const struct nft_set_ext *ext) 7683ac4c07aSPatrick McHardy { 7693ac4c07aSPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_FLAGS); 7703ac4c07aSPatrick McHardy } 771ef1f7df9SPatrick McHardy 772c3e1b005SPatrick McHardy static inline u64 *nft_set_ext_timeout(const struct nft_set_ext *ext) 773c3e1b005SPatrick McHardy { 774c3e1b005SPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_TIMEOUT); 775c3e1b005SPatrick McHardy } 776c3e1b005SPatrick McHardy 7778e1102d5SFlorian Westphal static inline u64 *nft_set_ext_expiration(const struct nft_set_ext *ext) 778c3e1b005SPatrick McHardy { 779c3e1b005SPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_EXPIRATION); 780c3e1b005SPatrick McHardy } 781c3e1b005SPatrick McHardy 78268e942e8SPatrick McHardy static inline struct nft_userdata *nft_set_ext_userdata(const struct nft_set_ext *ext) 78368e942e8SPatrick McHardy { 78468e942e8SPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_USERDATA); 78568e942e8SPatrick McHardy } 78668e942e8SPatrick McHardy 787563125a7SPablo Neira Ayuso static inline struct nft_set_elem_expr *nft_set_ext_expr(const struct nft_set_ext *ext) 788f25ad2e9SPatrick McHardy { 789563125a7SPablo Neira Ayuso return nft_set_ext(ext, NFT_SET_EXT_EXPRESSIONS); 790f25ad2e9SPatrick McHardy } 791f25ad2e9SPatrick McHardy 792c3e1b005SPatrick McHardy static inline bool nft_set_elem_expired(const struct nft_set_ext *ext) 793c3e1b005SPatrick McHardy { 794c3e1b005SPatrick McHardy return nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION) && 7958e1102d5SFlorian Westphal time_is_before_eq_jiffies64(*nft_set_ext_expiration(ext)); 796c3e1b005SPatrick McHardy } 797c3e1b005SPatrick McHardy 798fe2811ebSPatrick McHardy static inline struct nft_set_ext *nft_set_elem_ext(const struct nft_set *set, 799fe2811ebSPatrick McHardy void *elem) 800fe2811ebSPatrick McHardy { 801fe2811ebSPatrick McHardy return elem + set->ops->elemsize; 802fe2811ebSPatrick McHardy } 803fe2811ebSPatrick McHardy 8048aeff920SPablo Neira Ayuso static inline struct nft_object **nft_set_ext_obj(const struct nft_set_ext *ext) 8058aeff920SPablo Neira Ayuso { 8068aeff920SPablo Neira Ayuso return nft_set_ext(ext, NFT_SET_EXT_OBJREF); 8078aeff920SPablo Neira Ayuso } 8088aeff920SPablo Neira Ayuso 809a7fc9368SPablo Neira Ayuso struct nft_expr *nft_set_elem_expr_alloc(const struct nft_ctx *ctx, 810a7fc9368SPablo Neira Ayuso const struct nft_set *set, 811a7fc9368SPablo Neira Ayuso const struct nlattr *attr); 812a7fc9368SPablo Neira Ayuso 81322fe54d5SPatrick McHardy void *nft_set_elem_init(const struct nft_set *set, 81422fe54d5SPatrick McHardy const struct nft_set_ext_tmpl *tmpl, 8157b225d0bSPablo Neira Ayuso const u32 *key, const u32 *key_end, const u32 *data, 81679ebb5bbSLaura Garcia Liebana u64 timeout, u64 expiration, gfp_t gfp); 817fca05d4dSPablo Neira Ayuso int nft_set_elem_expr_clone(const struct nft_ctx *ctx, struct nft_set *set, 818fca05d4dSPablo Neira Ayuso struct nft_expr *expr_array[]); 81961f9e292SLiping Zhang void nft_set_elem_destroy(const struct nft_set *set, void *elem, 82061f9e292SLiping Zhang bool destroy_expr); 821628bd3e4SPablo Neira Ayuso void nf_tables_set_elem_destroy(const struct nft_ctx *ctx, 822628bd3e4SPablo Neira Ayuso const struct nft_set *set, void *elem); 82361edafbbSPatrick McHardy 824b8e20400SPablo Neira Ayuso struct nft_expr_ops; 825cfed7e1bSPatrick McHardy /** 826ef1f7df9SPatrick McHardy * struct nft_expr_type - nf_tables expression type 82796518518SPatrick McHardy * 828ef1f7df9SPatrick McHardy * @select_ops: function to select nft_expr_ops 829b8e20400SPablo Neira Ayuso * @release_ops: release nft_expr_ops 830ef1f7df9SPatrick McHardy * @ops: default ops, used when no select_ops functions is present 83196518518SPatrick McHardy * @list: used internally 83296518518SPatrick McHardy * @name: Identifier 83396518518SPatrick McHardy * @owner: module reference 83496518518SPatrick McHardy * @policy: netlink attribute policy 83596518518SPatrick McHardy * @maxattr: highest netlink attribute number 83664d46806SPatrick McHardy * @family: address family for AF-specific types 837151d799aSPatrick McHardy * @flags: expression type flags 838ef1f7df9SPatrick McHardy */ 839ef1f7df9SPatrick McHardy struct nft_expr_type { 8400ca743a5SPablo Neira Ayuso const struct nft_expr_ops *(*select_ops)(const struct nft_ctx *, 8410ca743a5SPablo Neira Ayuso const struct nlattr * const tb[]); 842b8e20400SPablo Neira Ayuso void (*release_ops)(const struct nft_expr_ops *ops); 843ef1f7df9SPatrick McHardy const struct nft_expr_ops *ops; 8443a07327dSPablo Neira Ayuso const struct nft_expr_ops *inner_ops; 845ef1f7df9SPatrick McHardy struct list_head list; 846ef1f7df9SPatrick McHardy const char *name; 847ef1f7df9SPatrick McHardy struct module *owner; 848ef1f7df9SPatrick McHardy const struct nla_policy *policy; 849ef1f7df9SPatrick McHardy unsigned int maxattr; 85064d46806SPatrick McHardy u8 family; 851151d799aSPatrick McHardy u8 flags; 852ef1f7df9SPatrick McHardy }; 853ef1f7df9SPatrick McHardy 854151d799aSPatrick McHardy #define NFT_EXPR_STATEFUL 0x1 85579b174adSPablo Neira Ayuso #define NFT_EXPR_GC 0x2 856151d799aSPatrick McHardy 857f6ac8585SPablo Neira Ayuso enum nft_trans_phase { 858f6ac8585SPablo Neira Ayuso NFT_TRANS_PREPARE, 85926b5a571SPablo Neira Ayuso NFT_TRANS_PREPARE_ERROR, 860f6ac8585SPablo Neira Ayuso NFT_TRANS_ABORT, 861f6ac8585SPablo Neira Ayuso NFT_TRANS_COMMIT, 862f6ac8585SPablo Neira Ayuso NFT_TRANS_RELEASE 863f6ac8585SPablo Neira Ayuso }; 864f6ac8585SPablo Neira Ayuso 865c9626a2cSPablo Neira Ayuso struct nft_flow_rule; 866c9626a2cSPablo Neira Ayuso struct nft_offload_ctx; 867c9626a2cSPablo Neira Ayuso 868ef1f7df9SPatrick McHardy /** 869ef1f7df9SPatrick McHardy * struct nft_expr_ops - nf_tables expression operations 870ef1f7df9SPatrick McHardy * 871ef1f7df9SPatrick McHardy * @eval: Expression evaluation function 87296518518SPatrick McHardy * @size: full expression size, including private data size 873ef1f7df9SPatrick McHardy * @init: initialization function 874cd5125d8SFlorian Westphal * @activate: activate expression in the next generation 875cd5125d8SFlorian Westphal * @deactivate: deactivate expression in next generation 876cd5125d8SFlorian Westphal * @destroy: destruction function, called after synchronize_rcu 877ef1f7df9SPatrick McHardy * @dump: function to dump parameters 878ef1f7df9SPatrick McHardy * @type: expression type 8790ca743a5SPablo Neira Ayuso * @validate: validate expression, called during loop detection 8800ca743a5SPablo Neira Ayuso * @data: extra data to attach to this expression operation 88196518518SPatrick McHardy */ 88296518518SPatrick McHardy struct nft_expr_ops { 88396518518SPatrick McHardy void (*eval)(const struct nft_expr *expr, 884a55e22e9SPatrick McHardy struct nft_regs *regs, 88596518518SPatrick McHardy const struct nft_pktinfo *pkt); 886086f3321SPablo Neira Ayuso int (*clone)(struct nft_expr *dst, 887086f3321SPablo Neira Ayuso const struct nft_expr *src); 888ef1f7df9SPatrick McHardy unsigned int size; 889ef1f7df9SPatrick McHardy 89096518518SPatrick McHardy int (*init)(const struct nft_ctx *ctx, 89196518518SPatrick McHardy const struct nft_expr *expr, 89296518518SPatrick McHardy const struct nlattr * const tb[]); 893bb7b40aeSPablo Neira Ayuso void (*activate)(const struct nft_ctx *ctx, 894bb7b40aeSPablo Neira Ayuso const struct nft_expr *expr); 895bb7b40aeSPablo Neira Ayuso void (*deactivate)(const struct nft_ctx *ctx, 896f6ac8585SPablo Neira Ayuso const struct nft_expr *expr, 897f6ac8585SPablo Neira Ayuso enum nft_trans_phase phase); 89862472bceSPatrick McHardy void (*destroy)(const struct nft_ctx *ctx, 89962472bceSPatrick McHardy const struct nft_expr *expr); 900371ebcbbSPablo Neira Ayuso void (*destroy_clone)(const struct nft_ctx *ctx, 901371ebcbbSPablo Neira Ayuso const struct nft_expr *expr); 90296518518SPatrick McHardy int (*dump)(struct sk_buff *skb, 9037d34aa3eSPhil Sutter const struct nft_expr *expr, 9047d34aa3eSPhil Sutter bool reset); 9050ca743a5SPablo Neira Ayuso int (*validate)(const struct nft_ctx *ctx, 9060ca743a5SPablo Neira Ayuso const struct nft_expr *expr, 9070ca743a5SPablo Neira Ayuso const struct nft_data **data); 90812e4ecfaSPablo Neira Ayuso bool (*reduce)(struct nft_regs_track *track, 90912e4ecfaSPablo Neira Ayuso const struct nft_expr *expr); 91079b174adSPablo Neira Ayuso bool (*gc)(struct net *net, 91179b174adSPablo Neira Ayuso const struct nft_expr *expr); 912c9626a2cSPablo Neira Ayuso int (*offload)(struct nft_offload_ctx *ctx, 913c9626a2cSPablo Neira Ayuso struct nft_flow_rule *flow, 914c9626a2cSPablo Neira Ayuso const struct nft_expr *expr); 915b1a5983fSPablo Neira Ayuso bool (*offload_action)(const struct nft_expr *expr); 916b72920f6SPablo Neira Ayuso void (*offload_stats)(struct nft_expr *expr, 917b72920f6SPablo Neira Ayuso const struct flow_stats *stats); 918ef1f7df9SPatrick McHardy const struct nft_expr_type *type; 9190ca743a5SPablo Neira Ayuso void *data; 92096518518SPatrick McHardy }; 92196518518SPatrick McHardy 92296518518SPatrick McHardy /** 92396518518SPatrick McHardy * struct nft_rule - nf_tables rule 92496518518SPatrick McHardy * 92596518518SPatrick McHardy * @list: used internally 92696518518SPatrick McHardy * @handle: rule handle 9270628b123SPablo Neira Ayuso * @genmask: generation mask 92896518518SPatrick McHardy * @dlen: length of expression data 92986f1ec32SPatrick McHardy * @udata: user data is appended to the rule 93096518518SPatrick McHardy * @data: expression data 93196518518SPatrick McHardy */ 93296518518SPatrick McHardy struct nft_rule { 93396518518SPatrick McHardy struct list_head list; 9340768b3b3SPablo Neira Ayuso u64 handle:42, 9350628b123SPablo Neira Ayuso genmask:2, 9360768b3b3SPablo Neira Ayuso dlen:12, 93786f1ec32SPatrick McHardy udata:1; 93896518518SPatrick McHardy unsigned char data[] 93996518518SPatrick McHardy __attribute__((aligned(__alignof__(struct nft_expr)))); 94096518518SPatrick McHardy }; 94196518518SPatrick McHardy 94296518518SPatrick McHardy static inline struct nft_expr *nft_expr_first(const struct nft_rule *rule) 94396518518SPatrick McHardy { 94496518518SPatrick McHardy return (struct nft_expr *)&rule->data[0]; 94596518518SPatrick McHardy } 94696518518SPatrick McHardy 94796518518SPatrick McHardy static inline struct nft_expr *nft_expr_next(const struct nft_expr *expr) 94896518518SPatrick McHardy { 94996518518SPatrick McHardy return ((void *)expr) + expr->ops->size; 95096518518SPatrick McHardy } 95196518518SPatrick McHardy 95296518518SPatrick McHardy static inline struct nft_expr *nft_expr_last(const struct nft_rule *rule) 95396518518SPatrick McHardy { 95496518518SPatrick McHardy return (struct nft_expr *)&rule->data[rule->dlen]; 95596518518SPatrick McHardy } 95696518518SPatrick McHardy 95731cc578aSSaeed Mirzamohammadi static inline bool nft_expr_more(const struct nft_rule *rule, 95831cc578aSSaeed Mirzamohammadi const struct nft_expr *expr) 95931cc578aSSaeed Mirzamohammadi { 96031cc578aSSaeed Mirzamohammadi return expr != nft_expr_last(rule) && expr->ops; 96131cc578aSSaeed Mirzamohammadi } 96231cc578aSSaeed Mirzamohammadi 96386f1ec32SPatrick McHardy static inline struct nft_userdata *nft_userdata(const struct nft_rule *rule) 9640768b3b3SPablo Neira Ayuso { 9650768b3b3SPablo Neira Ayuso return (void *)&rule->data[rule->dlen]; 9660768b3b3SPablo Neira Ayuso } 9670768b3b3SPablo Neira Ayuso 9684bedf9eeSPablo Neira Ayuso void nft_rule_expr_activate(const struct nft_ctx *ctx, struct nft_rule *rule); 9694bedf9eeSPablo Neira Ayuso void nft_rule_expr_deactivate(const struct nft_ctx *ctx, struct nft_rule *rule, 9704bedf9eeSPablo Neira Ayuso enum nft_trans_phase phase); 9714bedf9eeSPablo Neira Ayuso void nf_tables_rule_destroy(const struct nft_ctx *ctx, struct nft_rule *rule); 972d0e2c7deSPablo Neira Ayuso 97376adfafeSPablo Neira Ayuso static inline void nft_set_elem_update_expr(const struct nft_set_ext *ext, 97476adfafeSPablo Neira Ayuso struct nft_regs *regs, 97576adfafeSPablo Neira Ayuso const struct nft_pktinfo *pkt) 97676adfafeSPablo Neira Ayuso { 977563125a7SPablo Neira Ayuso struct nft_set_elem_expr *elem_expr; 97876adfafeSPablo Neira Ayuso struct nft_expr *expr; 979563125a7SPablo Neira Ayuso u32 size; 98076adfafeSPablo Neira Ayuso 981563125a7SPablo Neira Ayuso if (__nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS)) { 982563125a7SPablo Neira Ayuso elem_expr = nft_set_ext_expr(ext); 983563125a7SPablo Neira Ayuso nft_setelem_expr_foreach(expr, elem_expr, size) { 98476adfafeSPablo Neira Ayuso expr->ops->eval(expr, regs, pkt); 985563125a7SPablo Neira Ayuso if (regs->verdict.code == NFT_BREAK) 986563125a7SPablo Neira Ayuso return; 987563125a7SPablo Neira Ayuso } 98876adfafeSPablo Neira Ayuso } 98976adfafeSPablo Neira Ayuso } 99076adfafeSPablo Neira Ayuso 99196518518SPatrick McHardy /* 99296518518SPatrick McHardy * The last pointer isn't really necessary, but the compiler isn't able to 99396518518SPatrick McHardy * determine that the result of nft_expr_last() is always the same since it 99496518518SPatrick McHardy * can't assume that the dlen value wasn't changed within calls in the loop. 99596518518SPatrick McHardy */ 99696518518SPatrick McHardy #define nft_rule_for_each_expr(expr, last, rule) \ 99796518518SPatrick McHardy for ((expr) = nft_expr_first(rule), (last) = nft_expr_last(rule); \ 99896518518SPatrick McHardy (expr) != (last); \ 99996518518SPatrick McHardy (expr) = nft_expr_next(expr)) 100096518518SPatrick McHardy 1001ad652f38SPablo Neira Ayuso #define NFT_CHAIN_POLICY_UNSET U8_MAX 1002ad652f38SPablo Neira Ayuso 10032c865a8aSPablo Neira Ayuso struct nft_rule_dp { 10042c865a8aSPablo Neira Ayuso u64 is_last:1, 10052c865a8aSPablo Neira Ayuso dlen:12, 10062c865a8aSPablo Neira Ayuso handle:42; /* for tracing */ 10072c865a8aSPablo Neira Ayuso unsigned char data[] 10082c865a8aSPablo Neira Ayuso __attribute__((aligned(__alignof__(struct nft_expr)))); 10092c865a8aSPablo Neira Ayuso }; 10102c865a8aSPablo Neira Ayuso 101163e9bbbcSFlorian Westphal struct nft_rule_dp_last { 101263e9bbbcSFlorian Westphal struct nft_rule_dp end; /* end of nft_rule_blob marker */ 101363e9bbbcSFlorian Westphal struct rcu_head h; /* call_rcu head */ 101463e9bbbcSFlorian Westphal struct nft_rule_blob *blob; /* ptr to free via call_rcu */ 101563e9bbbcSFlorian Westphal const struct nft_chain *chain; /* for nftables tracing */ 101663e9bbbcSFlorian Westphal }; 101763e9bbbcSFlorian Westphal 101863e9bbbcSFlorian Westphal static inline const struct nft_rule_dp *nft_rule_next(const struct nft_rule_dp *rule) 101963e9bbbcSFlorian Westphal { 102063e9bbbcSFlorian Westphal return (void *)rule + sizeof(*rule) + rule->dlen; 102163e9bbbcSFlorian Westphal } 102263e9bbbcSFlorian Westphal 10232c865a8aSPablo Neira Ayuso struct nft_rule_blob { 10242c865a8aSPablo Neira Ayuso unsigned long size; 10252c865a8aSPablo Neira Ayuso unsigned char data[] 10262c865a8aSPablo Neira Ayuso __attribute__((aligned(__alignof__(struct nft_rule_dp)))); 10272c865a8aSPablo Neira Ayuso }; 10282c865a8aSPablo Neira Ayuso 102996518518SPatrick McHardy /** 103096518518SPatrick McHardy * struct nft_chain - nf_tables chain 103196518518SPatrick McHardy * 103296518518SPatrick McHardy * @rules: list of rules in the chain 103396518518SPatrick McHardy * @list: used internally 10341b2470e5SFlorian Westphal * @rhlhead: used internally 1035b5bc89bfSPablo Neira Ayuso * @table: table that this chain belongs to 103696518518SPatrick McHardy * @handle: chain handle 103796518518SPatrick McHardy * @use: number of jump references to this chain 1038a0a7379eSPablo Neira Ayuso * @flags: bitmask of enum nft_chain_flags 103996518518SPatrick McHardy * @name: name of the chain 104096518518SPatrick McHardy */ 104196518518SPatrick McHardy struct nft_chain { 10422c865a8aSPablo Neira Ayuso struct nft_rule_blob __rcu *blob_gen_0; 10432c865a8aSPablo Neira Ayuso struct nft_rule_blob __rcu *blob_gen_1; 104496518518SPatrick McHardy struct list_head rules; 104596518518SPatrick McHardy struct list_head list; 10461b2470e5SFlorian Westphal struct rhlist_head rhlhead; 1047b5bc89bfSPablo Neira Ayuso struct nft_table *table; 104896518518SPatrick McHardy u64 handle; 1049a0a7379eSPablo Neira Ayuso u32 use; 1050d0e2c7deSPablo Neira Ayuso u8 flags:5, 1051d0e2c7deSPablo Neira Ayuso bound:1, 1052664b0f8cSPablo Neira Ayuso genmask:2; 1053b7263e07SPhil Sutter char *name; 1054002f2176SJose M. Guisado Gomez u16 udlen; 1055002f2176SJose M. Guisado Gomez u8 *udata; 10560cbc06b3SFlorian Westphal 10570cbc06b3SFlorian Westphal /* Only used during control plane commit phase: */ 10582c865a8aSPablo Neira Ayuso struct nft_rule_blob *blob_next; 105996518518SPatrick McHardy }; 106096518518SPatrick McHardy 1061a654de8fSPablo Neira Ayuso int nft_chain_validate(const struct nft_ctx *ctx, const struct nft_chain *chain); 1062d46fc894SPablo Neira Ayuso int nft_setelem_validate(const struct nft_ctx *ctx, struct nft_set *set, 1063d46fc894SPablo Neira Ayuso const struct nft_set_iter *iter, 1064d46fc894SPablo Neira Ayuso struct nft_set_elem *elem); 1065d46fc894SPablo Neira Ayuso int nft_set_catchall_validate(const struct nft_ctx *ctx, struct nft_set *set); 10664bedf9eeSPablo Neira Ayuso int nf_tables_bind_chain(const struct nft_ctx *ctx, struct nft_chain *chain); 106726b5a571SPablo Neira Ayuso void nf_tables_unbind_chain(const struct nft_ctx *ctx, struct nft_chain *chain); 1068a654de8fSPablo Neira Ayuso 106932537e91SPablo Neira Ayuso enum nft_chain_types { 10709370761cSPablo Neira Ayuso NFT_CHAIN_T_DEFAULT = 0, 10719370761cSPablo Neira Ayuso NFT_CHAIN_T_ROUTE, 10729370761cSPablo Neira Ayuso NFT_CHAIN_T_NAT, 10739370761cSPablo Neira Ayuso NFT_CHAIN_T_MAX 10749370761cSPablo Neira Ayuso }; 10759370761cSPablo Neira Ayuso 10761a1e1a12SPatrick McHardy /** 107732537e91SPablo Neira Ayuso * struct nft_chain_type - nf_tables chain type info 10781a1e1a12SPatrick McHardy * 10791a1e1a12SPatrick McHardy * @name: name of the type 10801a1e1a12SPatrick McHardy * @type: numeric identifier 10811a1e1a12SPatrick McHardy * @family: address family 10821a1e1a12SPatrick McHardy * @owner: module owner 10831a1e1a12SPatrick McHardy * @hook_mask: mask of valid hooks 1084c2f9eafeSPablo Neira Ayuso * @hooks: array of hook functions 10854e25ceb8SFlorian Westphal * @ops_register: base chain register function 10864e25ceb8SFlorian Westphal * @ops_unregister: base chain unregister function 10871a1e1a12SPatrick McHardy */ 108832537e91SPablo Neira Ayuso struct nft_chain_type { 10891a1e1a12SPatrick McHardy const char *name; 109032537e91SPablo Neira Ayuso enum nft_chain_types type; 10911a1e1a12SPatrick McHardy int family; 10921a1e1a12SPatrick McHardy struct module *owner; 10931a1e1a12SPatrick McHardy unsigned int hook_mask; 1094d25e2e93SPablo Neira Ayuso nf_hookfn *hooks[NFT_MAX_HOOKS]; 10954e25ceb8SFlorian Westphal int (*ops_register)(struct net *net, const struct nf_hook_ops *ops); 10964e25ceb8SFlorian Westphal void (*ops_unregister)(struct net *net, const struct nf_hook_ops *ops); 10971a1e1a12SPatrick McHardy }; 10981a1e1a12SPatrick McHardy 10997210e4e3SPablo Neira Ayuso int nft_chain_validate_dependency(const struct nft_chain *chain, 110032537e91SPablo Neira Ayuso enum nft_chain_types type); 110175e8d06dSPablo Neira Ayuso int nft_chain_validate_hooks(const struct nft_chain *chain, 110275e8d06dSPablo Neira Ayuso unsigned int hook_flags); 11037210e4e3SPablo Neira Ayuso 11044bedf9eeSPablo Neira Ayuso static inline bool nft_chain_binding(const struct nft_chain *chain) 11054bedf9eeSPablo Neira Ayuso { 11064bedf9eeSPablo Neira Ayuso return chain->flags & NFT_CHAIN_BINDING; 11074bedf9eeSPablo Neira Ayuso } 11084bedf9eeSPablo Neira Ayuso 1109d0e2c7deSPablo Neira Ayuso static inline bool nft_chain_is_bound(struct nft_chain *chain) 1110d0e2c7deSPablo Neira Ayuso { 1111d0e2c7deSPablo Neira Ayuso return (chain->flags & NFT_CHAIN_BINDING) && chain->bound; 1112d0e2c7deSPablo Neira Ayuso } 1113d0e2c7deSPablo Neira Ayuso 11144bedf9eeSPablo Neira Ayuso int nft_chain_add(struct nft_table *table, struct nft_chain *chain); 1115d0e2c7deSPablo Neira Ayuso void nft_chain_del(struct nft_chain *chain); 1116d0e2c7deSPablo Neira Ayuso void nf_tables_chain_destroy(struct nft_ctx *ctx); 1117d0e2c7deSPablo Neira Ayuso 11180ca743a5SPablo Neira Ayuso struct nft_stats { 11190ca743a5SPablo Neira Ayuso u64 bytes; 11200ca743a5SPablo Neira Ayuso u64 pkts; 1121ce355e20SEric Dumazet struct u64_stats_sync syncp; 11220ca743a5SPablo Neira Ayuso }; 11230ca743a5SPablo Neira Ayuso 11243f0465a9SPablo Neira Ayuso struct nft_hook { 11253f0465a9SPablo Neira Ayuso struct list_head list; 11263f0465a9SPablo Neira Ayuso struct nf_hook_ops ops; 11273f0465a9SPablo Neira Ayuso struct rcu_head rcu; 11283f0465a9SPablo Neira Ayuso }; 11293f0465a9SPablo Neira Ayuso 113096518518SPatrick McHardy /** 113196518518SPatrick McHardy * struct nft_base_chain - nf_tables base chain 113296518518SPatrick McHardy * 113396518518SPatrick McHardy * @ops: netfilter hook ops 1134d54725cdSPablo Neira Ayuso * @hook_list: list of netfilter hooks (for NFPROTO_NETDEV family) 11359370761cSPablo Neira Ayuso * @type: chain type 11360ca743a5SPablo Neira Ayuso * @policy: default policy 11370ca743a5SPablo Neira Ayuso * @stats: per-cpu chain stats 113896518518SPatrick McHardy * @chain: the chain 113914bfb13fSPablo Neira Ayuso * @flow_block: flow block (for hardware offload) 114096518518SPatrick McHardy */ 114196518518SPatrick McHardy struct nft_base_chain { 1142c974a3a3SPablo Neira Ayuso struct nf_hook_ops ops; 1143d54725cdSPablo Neira Ayuso struct list_head hook_list; 114432537e91SPablo Neira Ayuso const struct nft_chain_type *type; 11450ca743a5SPablo Neira Ayuso u8 policy; 1146835b8033SPablo Neira Ayuso u8 flags; 11470ca743a5SPablo Neira Ayuso struct nft_stats __percpu *stats; 114896518518SPatrick McHardy struct nft_chain chain; 114914bfb13fSPablo Neira Ayuso struct flow_block flow_block; 115096518518SPatrick McHardy }; 115196518518SPatrick McHardy 115296518518SPatrick McHardy static inline struct nft_base_chain *nft_base_chain(const struct nft_chain *chain) 115396518518SPatrick McHardy { 115496518518SPatrick McHardy return container_of(chain, struct nft_base_chain, chain); 115596518518SPatrick McHardy } 115696518518SPatrick McHardy 1157f323d954SPablo Neira Ayuso static inline bool nft_is_base_chain(const struct nft_chain *chain) 1158f323d954SPablo Neira Ayuso { 115967c49de4SPablo Neira Ayuso return chain->flags & NFT_CHAIN_BASE; 1160f323d954SPablo Neira Ayuso } 1161f323d954SPablo Neira Ayuso 11625ebe0b0eSPablo Neira Ayuso int __nft_release_basechain(struct nft_ctx *ctx); 1163835b8033SPablo Neira Ayuso 116406198b34SEric W. Biederman unsigned int nft_do_chain(struct nft_pktinfo *pkt, void *priv); 116596518518SPatrick McHardy 11661689f259SPablo Neira Ayuso static inline bool nft_use_inc(u32 *use) 11671689f259SPablo Neira Ayuso { 11681689f259SPablo Neira Ayuso if (*use == UINT_MAX) 11691689f259SPablo Neira Ayuso return false; 11701689f259SPablo Neira Ayuso 11711689f259SPablo Neira Ayuso (*use)++; 11721689f259SPablo Neira Ayuso 11731689f259SPablo Neira Ayuso return true; 11741689f259SPablo Neira Ayuso } 11751689f259SPablo Neira Ayuso 11761689f259SPablo Neira Ayuso static inline void nft_use_dec(u32 *use) 11771689f259SPablo Neira Ayuso { 11781689f259SPablo Neira Ayuso WARN_ON_ONCE((*use)-- == 0); 11791689f259SPablo Neira Ayuso } 11801689f259SPablo Neira Ayuso 11811689f259SPablo Neira Ayuso /* For error and abort path: restore use counter to previous state. */ 11821689f259SPablo Neira Ayuso static inline void nft_use_inc_restore(u32 *use) 11831689f259SPablo Neira Ayuso { 11841689f259SPablo Neira Ayuso WARN_ON_ONCE(!nft_use_inc(use)); 11851689f259SPablo Neira Ayuso } 11861689f259SPablo Neira Ayuso 11871689f259SPablo Neira Ayuso #define nft_use_dec_restore nft_use_dec 11881689f259SPablo Neira Ayuso 118996518518SPatrick McHardy /** 119096518518SPatrick McHardy * struct nft_table - nf_tables table 119196518518SPatrick McHardy * 119296518518SPatrick McHardy * @list: used internally 11931b2470e5SFlorian Westphal * @chains_ht: chains in the table 11941b2470e5SFlorian Westphal * @chains: same, for stable walks 119596518518SPatrick McHardy * @sets: sets in the table 1196e5009240SPablo Neira Ayuso * @objects: stateful objects in the table 11973b49e2e9SPablo Neira Ayuso * @flowtables: flow tables in the table 119896518518SPatrick McHardy * @hgenerator: handle generator state 11993ecbfd65SHarsha Sharma * @handle: table handle 120096518518SPatrick McHardy * @use: number of chain references to this table 120196518518SPatrick McHardy * @flags: table flag (see enum nft_table_flags) 1202f2a6d766SPablo Neira Ayuso * @genmask: generation mask 120336596dadSPablo Neira Ayuso * @afinfo: address family info 120496518518SPatrick McHardy * @name: name of the table 120500c320f9SFlorian Westphal * @validate_state: internal, set when transaction adds jumps 120696518518SPatrick McHardy */ 120796518518SPatrick McHardy struct nft_table { 120896518518SPatrick McHardy struct list_head list; 12091b2470e5SFlorian Westphal struct rhltable chains_ht; 121096518518SPatrick McHardy struct list_head chains; 121196518518SPatrick McHardy struct list_head sets; 1212e5009240SPablo Neira Ayuso struct list_head objects; 12133b49e2e9SPablo Neira Ayuso struct list_head flowtables; 121496518518SPatrick McHardy u64 hgenerator; 12153ecbfd65SHarsha Sharma u64 handle; 121696518518SPatrick McHardy u32 use; 121798319cb9SPablo Neira Ayuso u16 family:6, 121898319cb9SPablo Neira Ayuso flags:8, 1219f2a6d766SPablo Neira Ayuso genmask:2; 12206001a930SPablo Neira Ayuso u32 nlpid; 1221e46abbccSPhil Sutter char *name; 12227a81575bSJose M. Guisado Gomez u16 udlen; 12237a81575bSJose M. Guisado Gomez u8 *udata; 122400c320f9SFlorian Westphal u8 validate_state; 1225ebddf1a8SPablo Neira Ayuso }; 1226ebddf1a8SPablo Neira Ayuso 12276001a930SPablo Neira Ayuso static inline bool nft_table_has_owner(const struct nft_table *table) 12286001a930SPablo Neira Ayuso { 12296001a930SPablo Neira Ayuso return table->flags & NFT_TABLE_F_OWNER; 12306001a930SPablo Neira Ayuso } 12316001a930SPablo Neira Ayuso 1232d3519cb8SPablo Neira Ayuso static inline bool nft_base_chain_netdev(int family, u32 hooknum) 1233d3519cb8SPablo Neira Ayuso { 1234d3519cb8SPablo Neira Ayuso return family == NFPROTO_NETDEV || 1235d3519cb8SPablo Neira Ayuso (family == NFPROTO_INET && hooknum == NF_INET_INGRESS); 1236d3519cb8SPablo Neira Ayuso } 1237d3519cb8SPablo Neira Ayuso 1238cc07eeb0SPablo Neira Ayuso void nft_register_chain_type(const struct nft_chain_type *); 123932537e91SPablo Neira Ayuso void nft_unregister_chain_type(const struct nft_chain_type *); 124096518518SPatrick McHardy 12415eccdfaaSJoe Perches int nft_register_expr(struct nft_expr_type *); 12425eccdfaaSJoe Perches void nft_unregister_expr(struct nft_expr_type *); 124396518518SPatrick McHardy 124433d5a7b1SFlorian Westphal int nft_verdict_dump(struct sk_buff *skb, int type, 124533d5a7b1SFlorian Westphal const struct nft_verdict *v); 124633d5a7b1SFlorian Westphal 124733d5a7b1SFlorian Westphal /** 1248d152159bSFlorian Westphal * struct nft_object_hash_key - key to lookup nft_object 1249d152159bSFlorian Westphal * 1250d152159bSFlorian Westphal * @name: name of the stateful object to look up 1251d152159bSFlorian Westphal * @table: table the object belongs to 1252d152159bSFlorian Westphal */ 1253d152159bSFlorian Westphal struct nft_object_hash_key { 1254d152159bSFlorian Westphal const char *name; 1255d152159bSFlorian Westphal const struct nft_table *table; 1256d152159bSFlorian Westphal }; 1257d152159bSFlorian Westphal 1258d152159bSFlorian Westphal /** 1259e5009240SPablo Neira Ayuso * struct nft_object - nf_tables stateful object 1260e5009240SPablo Neira Ayuso * 1261e5009240SPablo Neira Ayuso * @list: table stateful object list node 1262d152159bSFlorian Westphal * @key: keys that identify this object 12634d44175aSFlorian Westphal * @rhlhead: nft_objname_ht node 1264e5009240SPablo Neira Ayuso * @genmask: generation mask 1265e5009240SPablo Neira Ayuso * @use: number of references to this stateful object 12663ecbfd65SHarsha Sharma * @handle: unique object handle 1267dfc46034SPablo M. Bermudo Garay * @ops: object operations 12683ecbfd65SHarsha Sharma * @data: object data, layout depends on type 1269e5009240SPablo Neira Ayuso */ 1270e5009240SPablo Neira Ayuso struct nft_object { 1271e5009240SPablo Neira Ayuso struct list_head list; 12724d44175aSFlorian Westphal struct rhlist_head rhlhead; 1273d152159bSFlorian Westphal struct nft_object_hash_key key; 12741689f259SPablo Neira Ayuso u32 genmask:2; 12751689f259SPablo Neira Ayuso u32 use; 12763ecbfd65SHarsha Sharma u64 handle; 1277b131c964SJose M. Guisado Gomez u16 udlen; 1278b131c964SJose M. Guisado Gomez u8 *udata; 1279e5009240SPablo Neira Ayuso /* runtime data below here */ 1280dfc46034SPablo M. Bermudo Garay const struct nft_object_ops *ops ____cacheline_aligned; 1281e5009240SPablo Neira Ayuso unsigned char data[] 1282e5009240SPablo Neira Ayuso __attribute__((aligned(__alignof__(u64)))); 1283e5009240SPablo Neira Ayuso }; 1284e5009240SPablo Neira Ayuso 1285e5009240SPablo Neira Ayuso static inline void *nft_obj_data(const struct nft_object *obj) 1286e5009240SPablo Neira Ayuso { 1287e5009240SPablo Neira Ayuso return (void *)obj->data; 1288e5009240SPablo Neira Ayuso } 1289e5009240SPablo Neira Ayuso 1290e5009240SPablo Neira Ayuso #define nft_expr_obj(expr) *((struct nft_object **)nft_expr_priv(expr)) 1291e5009240SPablo Neira Ayuso 12924d44175aSFlorian Westphal struct nft_object *nft_obj_lookup(const struct net *net, 12934d44175aSFlorian Westphal const struct nft_table *table, 1294e5009240SPablo Neira Ayuso const struct nlattr *nla, u32 objtype, 1295e5009240SPablo Neira Ayuso u8 genmask); 1296e5009240SPablo Neira Ayuso 1297d152159bSFlorian Westphal void nft_obj_notify(struct net *net, const struct nft_table *table, 12982599e989SPablo Neira Ayuso struct nft_object *obj, u32 portid, u32 seq, 12996fb721cfSPablo Neira Ayuso int event, u16 flags, int family, int report, gfp_t gfp); 13002599e989SPablo Neira Ayuso 1301e5009240SPablo Neira Ayuso /** 1302e5009240SPablo Neira Ayuso * struct nft_object_type - stateful object type 1303e5009240SPablo Neira Ayuso * 1304dfc46034SPablo M. Bermudo Garay * @select_ops: function to select nft_object_ops 1305dfc46034SPablo M. Bermudo Garay * @ops: default ops, used when no select_ops functions is present 1306e5009240SPablo Neira Ayuso * @list: list node in list of object types 1307e5009240SPablo Neira Ayuso * @type: stateful object numeric type 1308e5009240SPablo Neira Ayuso * @owner: module owner 1309e5009240SPablo Neira Ayuso * @maxattr: maximum netlink attribute 1310e5009240SPablo Neira Ayuso * @policy: netlink attribute policy 1311dfc46034SPablo M. Bermudo Garay */ 1312dfc46034SPablo M. Bermudo Garay struct nft_object_type { 1313dfc46034SPablo M. Bermudo Garay const struct nft_object_ops *(*select_ops)(const struct nft_ctx *, 1314dfc46034SPablo M. Bermudo Garay const struct nlattr * const tb[]); 1315dfc46034SPablo M. Bermudo Garay const struct nft_object_ops *ops; 1316dfc46034SPablo M. Bermudo Garay struct list_head list; 1317dfc46034SPablo M. Bermudo Garay u32 type; 1318dfc46034SPablo M. Bermudo Garay unsigned int maxattr; 1319dfc46034SPablo M. Bermudo Garay struct module *owner; 1320dfc46034SPablo M. Bermudo Garay const struct nla_policy *policy; 1321dfc46034SPablo M. Bermudo Garay }; 1322dfc46034SPablo M. Bermudo Garay 1323dfc46034SPablo M. Bermudo Garay /** 1324dfc46034SPablo M. Bermudo Garay * struct nft_object_ops - stateful object operations 1325dfc46034SPablo M. Bermudo Garay * 1326dfc46034SPablo M. Bermudo Garay * @eval: stateful object evaluation function 1327dfc46034SPablo M. Bermudo Garay * @size: stateful object size 1328e5009240SPablo Neira Ayuso * @init: initialize object from netlink attributes 1329e5009240SPablo Neira Ayuso * @destroy: release existing stateful object 1330e5009240SPablo Neira Ayuso * @dump: netlink dump stateful object 1331d62d0ba9SFernando Fernandez Mancera * @update: update stateful object 1332e5009240SPablo Neira Ayuso */ 1333dfc46034SPablo M. Bermudo Garay struct nft_object_ops { 1334e5009240SPablo Neira Ayuso void (*eval)(struct nft_object *obj, 1335e5009240SPablo Neira Ayuso struct nft_regs *regs, 1336e5009240SPablo Neira Ayuso const struct nft_pktinfo *pkt); 1337e5009240SPablo Neira Ayuso unsigned int size; 133884fba055SFlorian Westphal int (*init)(const struct nft_ctx *ctx, 133984fba055SFlorian Westphal const struct nlattr *const tb[], 1340e5009240SPablo Neira Ayuso struct nft_object *obj); 134100bfb320SPablo Neira Ayuso void (*destroy)(const struct nft_ctx *ctx, 134200bfb320SPablo Neira Ayuso struct nft_object *obj); 1343e5009240SPablo Neira Ayuso int (*dump)(struct sk_buff *skb, 134443da04a5SPablo Neira Ayuso struct nft_object *obj, 134543da04a5SPablo Neira Ayuso bool reset); 1346d62d0ba9SFernando Fernandez Mancera void (*update)(struct nft_object *obj, 1347d62d0ba9SFernando Fernandez Mancera struct nft_object *newobj); 1348dfc46034SPablo M. Bermudo Garay const struct nft_object_type *type; 1349e5009240SPablo Neira Ayuso }; 1350e5009240SPablo Neira Ayuso 1351e5009240SPablo Neira Ayuso int nft_register_obj(struct nft_object_type *obj_type); 1352e5009240SPablo Neira Ayuso void nft_unregister_obj(struct nft_object_type *obj_type); 1353e5009240SPablo Neira Ayuso 1354cb662ac6SPablo Neira Ayuso #define NFT_NETDEVICE_MAX 256 1355d92191aaSPablo Neira Ayuso 1356e5009240SPablo Neira Ayuso /** 13573b49e2e9SPablo Neira Ayuso * struct nft_flowtable - nf_tables flow table 13583b49e2e9SPablo Neira Ayuso * 13593b49e2e9SPablo Neira Ayuso * @list: flow table list node in table list 13603b49e2e9SPablo Neira Ayuso * @table: the table the flow table is contained in 13613b49e2e9SPablo Neira Ayuso * @name: name of this flow table 13623b49e2e9SPablo Neira Ayuso * @hooknum: hook number 13633b49e2e9SPablo Neira Ayuso * @ops_len: number of hooks in array 13643b49e2e9SPablo Neira Ayuso * @genmask: generation mask 13653b49e2e9SPablo Neira Ayuso * @use: number of references to this flow table 13663ecbfd65SHarsha Sharma * @handle: unique object handle 1367d92191aaSPablo Neira Ayuso * @dev_name: array of device names 13683b49e2e9SPablo Neira Ayuso * @data: rhashtable and garbage collector 13693b49e2e9SPablo Neira Ayuso * @ops: array of hooks 13703b49e2e9SPablo Neira Ayuso */ 13713b49e2e9SPablo Neira Ayuso struct nft_flowtable { 13723b49e2e9SPablo Neira Ayuso struct list_head list; 13733b49e2e9SPablo Neira Ayuso struct nft_table *table; 13743b49e2e9SPablo Neira Ayuso char *name; 13753b49e2e9SPablo Neira Ayuso int hooknum; 13763b49e2e9SPablo Neira Ayuso int ops_len; 13771689f259SPablo Neira Ayuso u32 genmask:2; 13781689f259SPablo Neira Ayuso u32 use; 13793ecbfd65SHarsha Sharma u64 handle; 13803b49e2e9SPablo Neira Ayuso /* runtime data below here */ 13813f0465a9SPablo Neira Ayuso struct list_head hook_list ____cacheline_aligned; 13823b49e2e9SPablo Neira Ayuso struct nf_flowtable data; 13833b49e2e9SPablo Neira Ayuso }; 13843b49e2e9SPablo Neira Ayuso 1385cac20fcdSPablo Neira Ayuso struct nft_flowtable *nft_flowtable_lookup(const struct nft_table *table, 13863b49e2e9SPablo Neira Ayuso const struct nlattr *nla, 13873b49e2e9SPablo Neira Ayuso u8 genmask); 13883b49e2e9SPablo Neira Ayuso 13899b05b6e1SLaura Garcia Liebana void nf_tables_deactivate_flowtable(const struct nft_ctx *ctx, 13909b05b6e1SLaura Garcia Liebana struct nft_flowtable *flowtable, 13919b05b6e1SLaura Garcia Liebana enum nft_trans_phase phase); 13929b05b6e1SLaura Garcia Liebana 13933b49e2e9SPablo Neira Ayuso void nft_register_flowtable_type(struct nf_flowtable_type *type); 13943b49e2e9SPablo Neira Ayuso void nft_unregister_flowtable_type(struct nf_flowtable_type *type); 13953b49e2e9SPablo Neira Ayuso 13963b49e2e9SPablo Neira Ayuso /** 139733d5a7b1SFlorian Westphal * struct nft_traceinfo - nft tracing information and state 139833d5a7b1SFlorian Westphal * 1399e34b9ed9SFlorian Westphal * @trace: other struct members are initialised 1400e34b9ed9SFlorian Westphal * @nf_trace: copy of skb->nf_trace before rule evaluation 1401e34b9ed9SFlorian Westphal * @type: event type (enum nft_trace_types) 1402e34b9ed9SFlorian Westphal * @skbid: hash of skb to be used as trace id 1403e34b9ed9SFlorian Westphal * @packet_dumped: packet headers sent in a previous traceinfo message 140433d5a7b1SFlorian Westphal * @basechain: base chain currently processed 140533d5a7b1SFlorian Westphal */ 140633d5a7b1SFlorian Westphal struct nft_traceinfo { 1407e34b9ed9SFlorian Westphal bool trace; 1408e34b9ed9SFlorian Westphal bool nf_trace; 1409e34b9ed9SFlorian Westphal bool packet_dumped; 1410e34b9ed9SFlorian Westphal enum nft_trace_types type:8; 1411e34b9ed9SFlorian Westphal u32 skbid; 141233d5a7b1SFlorian Westphal const struct nft_base_chain *basechain; 141333d5a7b1SFlorian Westphal }; 141433d5a7b1SFlorian Westphal 141533d5a7b1SFlorian Westphal void nft_trace_init(struct nft_traceinfo *info, const struct nft_pktinfo *pkt, 141633d5a7b1SFlorian Westphal const struct nft_chain *basechain); 141733d5a7b1SFlorian Westphal 1418698bb828SFlorian Westphal void nft_trace_notify(const struct nft_pktinfo *pkt, 14190a202145SFlorian Westphal const struct nft_verdict *verdict, 142046df4175SFlorian Westphal const struct nft_rule_dp *rule, 1421698bb828SFlorian Westphal struct nft_traceinfo *info); 142233d5a7b1SFlorian Westphal 14239370761cSPablo Neira Ayuso #define MODULE_ALIAS_NFT_CHAIN(family, name) \ 14249370761cSPablo Neira Ayuso MODULE_ALIAS("nft-chain-" __stringify(family) "-" name) 142596518518SPatrick McHardy 142664d46806SPatrick McHardy #define MODULE_ALIAS_NFT_AF_EXPR(family, name) \ 142764d46806SPatrick McHardy MODULE_ALIAS("nft-expr-" __stringify(family) "-" name) 142864d46806SPatrick McHardy 142996518518SPatrick McHardy #define MODULE_ALIAS_NFT_EXPR(name) \ 143096518518SPatrick McHardy MODULE_ALIAS("nft-expr-" name) 143196518518SPatrick McHardy 1432e5009240SPablo Neira Ayuso #define MODULE_ALIAS_NFT_OBJ(type) \ 1433e5009240SPablo Neira Ayuso MODULE_ALIAS("nft-obj-" __stringify(type)) 1434e5009240SPablo Neira Ayuso 143547e640afSJeremy Sowden #if IS_ENABLED(CONFIG_NF_TABLES) 143647e640afSJeremy Sowden 1437ea4bd995SPatrick McHardy /* 1438ea4bd995SPatrick McHardy * The gencursor defines two generations, the currently active and the 1439ea4bd995SPatrick McHardy * next one. Objects contain a bitmask of 2 bits specifying the generations 1440ea4bd995SPatrick McHardy * they're active in. A set bit means they're inactive in the generation 1441ea4bd995SPatrick McHardy * represented by that bit. 1442ea4bd995SPatrick McHardy * 1443ea4bd995SPatrick McHardy * New objects start out as inactive in the current and active in the 1444ea4bd995SPatrick McHardy * next generation. When committing the ruleset the bitmask is cleared, 1445ea4bd995SPatrick McHardy * meaning they're active in all generations. When removing an object, 1446ea4bd995SPatrick McHardy * it is set inactive in the next generation. After committing the ruleset, 1447ea4bd995SPatrick McHardy * the objects are removed. 1448ea4bd995SPatrick McHardy */ 1449ea4bd995SPatrick McHardy static inline unsigned int nft_gencursor_next(const struct net *net) 1450ea4bd995SPatrick McHardy { 1451ea4bd995SPatrick McHardy return net->nft.gencursor + 1 == 1 ? 1 : 0; 1452ea4bd995SPatrick McHardy } 1453ea4bd995SPatrick McHardy 1454ea4bd995SPatrick McHardy static inline u8 nft_genmask_next(const struct net *net) 1455ea4bd995SPatrick McHardy { 1456ea4bd995SPatrick McHardy return 1 << nft_gencursor_next(net); 1457ea4bd995SPatrick McHardy } 1458ea4bd995SPatrick McHardy 1459ea4bd995SPatrick McHardy static inline u8 nft_genmask_cur(const struct net *net) 1460ea4bd995SPatrick McHardy { 146114cd5d4aSMark Rutland /* Use READ_ONCE() to prevent refetching the value for atomicity */ 146214cd5d4aSMark Rutland return 1 << READ_ONCE(net->nft.gencursor); 1463ea4bd995SPatrick McHardy } 1464ea4bd995SPatrick McHardy 146522fe54d5SPatrick McHardy #define NFT_GENMASK_ANY ((1 << 0) | (1 << 1)) 146622fe54d5SPatrick McHardy 1467cc02e457SPatrick McHardy /* 1468889f7ee7SPablo Neira Ayuso * Generic transaction helpers 1469889f7ee7SPablo Neira Ayuso */ 1470889f7ee7SPablo Neira Ayuso 1471889f7ee7SPablo Neira Ayuso /* Check if this object is currently active. */ 1472889f7ee7SPablo Neira Ayuso #define nft_is_active(__net, __obj) \ 1473889f7ee7SPablo Neira Ayuso (((__obj)->genmask & nft_genmask_cur(__net)) == 0) 1474889f7ee7SPablo Neira Ayuso 1475889f7ee7SPablo Neira Ayuso /* Check if this object is active in the next generation. */ 1476889f7ee7SPablo Neira Ayuso #define nft_is_active_next(__net, __obj) \ 1477889f7ee7SPablo Neira Ayuso (((__obj)->genmask & nft_genmask_next(__net)) == 0) 1478889f7ee7SPablo Neira Ayuso 1479889f7ee7SPablo Neira Ayuso /* This object becomes active in the next generation. */ 1480889f7ee7SPablo Neira Ayuso #define nft_activate_next(__net, __obj) \ 1481889f7ee7SPablo Neira Ayuso (__obj)->genmask = nft_genmask_cur(__net) 1482889f7ee7SPablo Neira Ayuso 1483889f7ee7SPablo Neira Ayuso /* This object becomes inactive in the next generation. */ 1484889f7ee7SPablo Neira Ayuso #define nft_deactivate_next(__net, __obj) \ 1485889f7ee7SPablo Neira Ayuso (__obj)->genmask = nft_genmask_next(__net) 1486889f7ee7SPablo Neira Ayuso 1487889f7ee7SPablo Neira Ayuso /* After committing the ruleset, clear the stale generation bit. */ 1488889f7ee7SPablo Neira Ayuso #define nft_clear(__net, __obj) \ 1489889f7ee7SPablo Neira Ayuso (__obj)->genmask &= ~nft_genmask_next(__net) 1490f2a6d766SPablo Neira Ayuso #define nft_active_genmask(__obj, __genmask) \ 1491f2a6d766SPablo Neira Ayuso !((__obj)->genmask & __genmask) 1492889f7ee7SPablo Neira Ayuso 1493889f7ee7SPablo Neira Ayuso /* 1494cc02e457SPatrick McHardy * Set element transaction helpers 1495cc02e457SPatrick McHardy */ 1496cc02e457SPatrick McHardy 1497cc02e457SPatrick McHardy static inline bool nft_set_elem_active(const struct nft_set_ext *ext, 1498cc02e457SPatrick McHardy u8 genmask) 1499cc02e457SPatrick McHardy { 1500cc02e457SPatrick McHardy return !(ext->genmask & genmask); 1501cc02e457SPatrick McHardy } 1502cc02e457SPatrick McHardy 150342a55769SPablo Neira Ayuso static inline void nft_set_elem_change_active(const struct net *net, 150442a55769SPablo Neira Ayuso const struct nft_set *set, 1505cc02e457SPatrick McHardy struct nft_set_ext *ext) 1506cc02e457SPatrick McHardy { 150742a55769SPablo Neira Ayuso ext->genmask ^= nft_genmask_next(net); 1508cc02e457SPatrick McHardy } 1509cc02e457SPatrick McHardy 151047e640afSJeremy Sowden #endif /* IS_ENABLED(CONFIG_NF_TABLES) */ 151147e640afSJeremy Sowden 1512a2dd0233SPablo Neira Ayuso #define NFT_SET_ELEM_DEAD_MASK (1 << 2) 151369086658SPatrick McHardy 151469086658SPatrick McHardy #if defined(__LITTLE_ENDIAN_BITFIELD) 1515a2dd0233SPablo Neira Ayuso #define NFT_SET_ELEM_DEAD_BIT 2 151669086658SPatrick McHardy #elif defined(__BIG_ENDIAN_BITFIELD) 1517a2dd0233SPablo Neira Ayuso #define NFT_SET_ELEM_DEAD_BIT (BITS_PER_LONG - BITS_PER_BYTE + 2) 15185f68718bSPablo Neira Ayuso #else 15195f68718bSPablo Neira Ayuso #error 15205f68718bSPablo Neira Ayuso #endif 15215f68718bSPablo Neira Ayuso 15225f68718bSPablo Neira Ayuso static inline void nft_set_elem_dead(struct nft_set_ext *ext) 15235f68718bSPablo Neira Ayuso { 15245f68718bSPablo Neira Ayuso unsigned long *word = (unsigned long *)ext; 15255f68718bSPablo Neira Ayuso 15265f68718bSPablo Neira Ayuso BUILD_BUG_ON(offsetof(struct nft_set_ext, genmask) != 0); 15275f68718bSPablo Neira Ayuso set_bit(NFT_SET_ELEM_DEAD_BIT, word); 15285f68718bSPablo Neira Ayuso } 15295f68718bSPablo Neira Ayuso 15305f68718bSPablo Neira Ayuso static inline int nft_set_elem_is_dead(const struct nft_set_ext *ext) 15315f68718bSPablo Neira Ayuso { 15325f68718bSPablo Neira Ayuso unsigned long *word = (unsigned long *)ext; 15335f68718bSPablo Neira Ayuso 15345f68718bSPablo Neira Ayuso BUILD_BUG_ON(offsetof(struct nft_set_ext, genmask) != 0); 15355f68718bSPablo Neira Ayuso return test_bit(NFT_SET_ELEM_DEAD_BIT, word); 15365f68718bSPablo Neira Ayuso } 15375f68718bSPablo Neira Ayuso 15381a1e1a12SPatrick McHardy /** 15391a1e1a12SPatrick McHardy * struct nft_trans - nf_tables object update in transaction 15401a1e1a12SPatrick McHardy * 15411a1e1a12SPatrick McHardy * @list: used internally 1542938154b9SPablo Neira Ayuso * @binding_list: list of objects with possible bindings 15431a1e1a12SPatrick McHardy * @msg_type: message type 15440935d558SFlorian Westphal * @put_net: ctx->net needs to be put 15451a1e1a12SPatrick McHardy * @ctx: transaction context 15461a1e1a12SPatrick McHardy * @data: internal information related to the transaction 15471a1e1a12SPatrick McHardy */ 15481a1e1a12SPatrick McHardy struct nft_trans { 15491a1e1a12SPatrick McHardy struct list_head list; 1550938154b9SPablo Neira Ayuso struct list_head binding_list; 15511a1e1a12SPatrick McHardy int msg_type; 15520935d558SFlorian Westphal bool put_net; 15531a1e1a12SPatrick McHardy struct nft_ctx ctx; 15546daf1414SGustavo A. R. Silva char data[]; 15551a1e1a12SPatrick McHardy }; 15561a1e1a12SPatrick McHardy 15571a1e1a12SPatrick McHardy struct nft_trans_rule { 15581a1e1a12SPatrick McHardy struct nft_rule *rule; 1559c9626a2cSPablo Neira Ayuso struct nft_flow_rule *flow; 15601a94e38dSPablo Neira Ayuso u32 rule_id; 15614bedf9eeSPablo Neira Ayuso bool bound; 15621a1e1a12SPatrick McHardy }; 15631a1e1a12SPatrick McHardy 15641a1e1a12SPatrick McHardy #define nft_trans_rule(trans) \ 15651a1e1a12SPatrick McHardy (((struct nft_trans_rule *)trans->data)->rule) 1566c9626a2cSPablo Neira Ayuso #define nft_trans_flow_rule(trans) \ 1567c9626a2cSPablo Neira Ayuso (((struct nft_trans_rule *)trans->data)->flow) 15681a94e38dSPablo Neira Ayuso #define nft_trans_rule_id(trans) \ 15691a94e38dSPablo Neira Ayuso (((struct nft_trans_rule *)trans->data)->rule_id) 15704bedf9eeSPablo Neira Ayuso #define nft_trans_rule_bound(trans) \ 15714bedf9eeSPablo Neira Ayuso (((struct nft_trans_rule *)trans->data)->bound) 15721a1e1a12SPatrick McHardy 15731a1e1a12SPatrick McHardy struct nft_trans_set { 15741a1e1a12SPatrick McHardy struct nft_set *set; 15751a1e1a12SPatrick McHardy u32 set_id; 1576123b9961SPablo Neira Ayuso u32 gc_int; 1577123b9961SPablo Neira Ayuso u64 timeout; 1578123b9961SPablo Neira Ayuso bool update; 15796a0a8d10SPablo Neira Ayuso bool bound; 158096b2ef9bSFlorian Westphal u32 size; 15811a1e1a12SPatrick McHardy }; 15821a1e1a12SPatrick McHardy 15831a1e1a12SPatrick McHardy #define nft_trans_set(trans) \ 15841a1e1a12SPatrick McHardy (((struct nft_trans_set *)trans->data)->set) 15851a1e1a12SPatrick McHardy #define nft_trans_set_id(trans) \ 15861a1e1a12SPatrick McHardy (((struct nft_trans_set *)trans->data)->set_id) 15876a0a8d10SPablo Neira Ayuso #define nft_trans_set_bound(trans) \ 15886a0a8d10SPablo Neira Ayuso (((struct nft_trans_set *)trans->data)->bound) 1589123b9961SPablo Neira Ayuso #define nft_trans_set_update(trans) \ 1590123b9961SPablo Neira Ayuso (((struct nft_trans_set *)trans->data)->update) 1591123b9961SPablo Neira Ayuso #define nft_trans_set_timeout(trans) \ 1592123b9961SPablo Neira Ayuso (((struct nft_trans_set *)trans->data)->timeout) 1593123b9961SPablo Neira Ayuso #define nft_trans_set_gc_int(trans) \ 1594123b9961SPablo Neira Ayuso (((struct nft_trans_set *)trans->data)->gc_int) 159596b2ef9bSFlorian Westphal #define nft_trans_set_size(trans) \ 159696b2ef9bSFlorian Westphal (((struct nft_trans_set *)trans->data)->size) 15971a1e1a12SPatrick McHardy 15981a1e1a12SPatrick McHardy struct nft_trans_chain { 15994bedf9eeSPablo Neira Ayuso struct nft_chain *chain; 16001a1e1a12SPatrick McHardy bool update; 1601b7263e07SPhil Sutter char *name; 16021a1e1a12SPatrick McHardy struct nft_stats __percpu *stats; 16031a1e1a12SPatrick McHardy u8 policy; 16044bedf9eeSPablo Neira Ayuso bool bound; 160574cccc3dSPablo Neira Ayuso u32 chain_id; 1606b9703ed4SPablo Neira Ayuso struct nft_base_chain *basechain; 1607b9703ed4SPablo Neira Ayuso struct list_head hook_list; 16081a1e1a12SPatrick McHardy }; 16091a1e1a12SPatrick McHardy 16104bedf9eeSPablo Neira Ayuso #define nft_trans_chain(trans) \ 16114bedf9eeSPablo Neira Ayuso (((struct nft_trans_chain *)trans->data)->chain) 16121a1e1a12SPatrick McHardy #define nft_trans_chain_update(trans) \ 16131a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->update) 16141a1e1a12SPatrick McHardy #define nft_trans_chain_name(trans) \ 16151a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->name) 16161a1e1a12SPatrick McHardy #define nft_trans_chain_stats(trans) \ 16171a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->stats) 16181a1e1a12SPatrick McHardy #define nft_trans_chain_policy(trans) \ 16191a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->policy) 16204bedf9eeSPablo Neira Ayuso #define nft_trans_chain_bound(trans) \ 16214bedf9eeSPablo Neira Ayuso (((struct nft_trans_chain *)trans->data)->bound) 162274cccc3dSPablo Neira Ayuso #define nft_trans_chain_id(trans) \ 162374cccc3dSPablo Neira Ayuso (((struct nft_trans_chain *)trans->data)->chain_id) 1624b9703ed4SPablo Neira Ayuso #define nft_trans_basechain(trans) \ 1625b9703ed4SPablo Neira Ayuso (((struct nft_trans_chain *)trans->data)->basechain) 1626b9703ed4SPablo Neira Ayuso #define nft_trans_chain_hooks(trans) \ 1627b9703ed4SPablo Neira Ayuso (((struct nft_trans_chain *)trans->data)->hook_list) 16281a1e1a12SPatrick McHardy 16291a1e1a12SPatrick McHardy struct nft_trans_table { 16301a1e1a12SPatrick McHardy bool update; 16311a1e1a12SPatrick McHardy }; 16321a1e1a12SPatrick McHardy 16331a1e1a12SPatrick McHardy #define nft_trans_table_update(trans) \ 16341a1e1a12SPatrick McHardy (((struct nft_trans_table *)trans->data)->update) 16351a1e1a12SPatrick McHardy 16361a1e1a12SPatrick McHardy struct nft_trans_elem { 16371a1e1a12SPatrick McHardy struct nft_set *set; 16381a1e1a12SPatrick McHardy struct nft_set_elem elem; 16396a0a8d10SPablo Neira Ayuso bool bound; 16401a1e1a12SPatrick McHardy }; 16411a1e1a12SPatrick McHardy 16421a1e1a12SPatrick McHardy #define nft_trans_elem_set(trans) \ 16431a1e1a12SPatrick McHardy (((struct nft_trans_elem *)trans->data)->set) 16441a1e1a12SPatrick McHardy #define nft_trans_elem(trans) \ 16451a1e1a12SPatrick McHardy (((struct nft_trans_elem *)trans->data)->elem) 16466a0a8d10SPablo Neira Ayuso #define nft_trans_elem_set_bound(trans) \ 16476a0a8d10SPablo Neira Ayuso (((struct nft_trans_elem *)trans->data)->bound) 16481a1e1a12SPatrick McHardy 1649e5009240SPablo Neira Ayuso struct nft_trans_obj { 1650e5009240SPablo Neira Ayuso struct nft_object *obj; 1651d62d0ba9SFernando Fernandez Mancera struct nft_object *newobj; 1652d62d0ba9SFernando Fernandez Mancera bool update; 1653e5009240SPablo Neira Ayuso }; 1654e5009240SPablo Neira Ayuso 1655e5009240SPablo Neira Ayuso #define nft_trans_obj(trans) \ 1656e5009240SPablo Neira Ayuso (((struct nft_trans_obj *)trans->data)->obj) 1657d62d0ba9SFernando Fernandez Mancera #define nft_trans_obj_newobj(trans) \ 1658d62d0ba9SFernando Fernandez Mancera (((struct nft_trans_obj *)trans->data)->newobj) 1659d62d0ba9SFernando Fernandez Mancera #define nft_trans_obj_update(trans) \ 1660d62d0ba9SFernando Fernandez Mancera (((struct nft_trans_obj *)trans->data)->update) 1661e5009240SPablo Neira Ayuso 16623b49e2e9SPablo Neira Ayuso struct nft_trans_flowtable { 16633b49e2e9SPablo Neira Ayuso struct nft_flowtable *flowtable; 166478d9f48fSPablo Neira Ayuso bool update; 166578d9f48fSPablo Neira Ayuso struct list_head hook_list; 16667b35582cSPablo Neira Ayuso u32 flags; 16673b49e2e9SPablo Neira Ayuso }; 16683b49e2e9SPablo Neira Ayuso 16693b49e2e9SPablo Neira Ayuso #define nft_trans_flowtable(trans) \ 16703b49e2e9SPablo Neira Ayuso (((struct nft_trans_flowtable *)trans->data)->flowtable) 167178d9f48fSPablo Neira Ayuso #define nft_trans_flowtable_update(trans) \ 167278d9f48fSPablo Neira Ayuso (((struct nft_trans_flowtable *)trans->data)->update) 167378d9f48fSPablo Neira Ayuso #define nft_trans_flowtable_hooks(trans) \ 167478d9f48fSPablo Neira Ayuso (((struct nft_trans_flowtable *)trans->data)->hook_list) 16757b35582cSPablo Neira Ayuso #define nft_trans_flowtable_flags(trans) \ 16767b35582cSPablo Neira Ayuso (((struct nft_trans_flowtable *)trans->data)->flags) 16773b49e2e9SPablo Neira Ayuso 16785f68718bSPablo Neira Ayuso #define NFT_TRANS_GC_BATCHCOUNT 256 16795f68718bSPablo Neira Ayuso 16805f68718bSPablo Neira Ayuso struct nft_trans_gc { 16815f68718bSPablo Neira Ayuso struct list_head list; 16825f68718bSPablo Neira Ayuso struct net *net; 16835f68718bSPablo Neira Ayuso struct nft_set *set; 16845f68718bSPablo Neira Ayuso u32 seq; 16855f68718bSPablo Neira Ayuso u8 count; 16865f68718bSPablo Neira Ayuso void *priv[NFT_TRANS_GC_BATCHCOUNT]; 16875f68718bSPablo Neira Ayuso struct rcu_head rcu; 16885f68718bSPablo Neira Ayuso }; 16895f68718bSPablo Neira Ayuso 16905f68718bSPablo Neira Ayuso struct nft_trans_gc *nft_trans_gc_alloc(struct nft_set *set, 16915f68718bSPablo Neira Ayuso unsigned int gc_seq, gfp_t gfp); 16925f68718bSPablo Neira Ayuso void nft_trans_gc_destroy(struct nft_trans_gc *trans); 16935f68718bSPablo Neira Ayuso 16945f68718bSPablo Neira Ayuso struct nft_trans_gc *nft_trans_gc_queue_async(struct nft_trans_gc *gc, 16955f68718bSPablo Neira Ayuso unsigned int gc_seq, gfp_t gfp); 16965f68718bSPablo Neira Ayuso void nft_trans_gc_queue_async_done(struct nft_trans_gc *gc); 16975f68718bSPablo Neira Ayuso 16985f68718bSPablo Neira Ayuso struct nft_trans_gc *nft_trans_gc_queue_sync(struct nft_trans_gc *gc, gfp_t gfp); 16995f68718bSPablo Neira Ayuso void nft_trans_gc_queue_sync_done(struct nft_trans_gc *trans); 17005f68718bSPablo Neira Ayuso 17015f68718bSPablo Neira Ayuso void nft_trans_gc_elem_add(struct nft_trans_gc *gc, void *priv); 17025f68718bSPablo Neira Ayuso 17035f68718bSPablo Neira Ayuso struct nft_trans_gc *nft_trans_gc_catchall(struct nft_trans_gc *gc, 17045f68718bSPablo Neira Ayuso unsigned int gc_seq); 17055f68718bSPablo Neira Ayuso 17065f68718bSPablo Neira Ayuso void nft_setelem_data_deactivate(const struct net *net, 17075f68718bSPablo Neira Ayuso const struct nft_set *set, 17085f68718bSPablo Neira Ayuso struct nft_set_elem *elem); 17095f68718bSPablo Neira Ayuso 171002c7b25eSPablo Neira Ayuso int __init nft_chain_filter_init(void); 1711d209df3eSFlorian Westphal void nft_chain_filter_fini(void); 171202c7b25eSPablo Neira Ayuso 1713c1deb065SFlorian Westphal void __init nft_chain_route_init(void); 1714c1deb065SFlorian Westphal void nft_chain_route_fini(void); 1715ffe8923fSFlorian Westphal 1716ffe8923fSFlorian Westphal void nf_tables_trans_destroy_flush_work(void); 1717917d80d3SPablo Neira Ayuso 1718917d80d3SPablo Neira Ayuso int nf_msecs_to_jiffies64(const struct nlattr *nla, u64 *result); 1719917d80d3SPablo Neira Ayuso __be64 nf_jiffies64_to_msecs(u64 input); 1720917d80d3SPablo Neira Ayuso 1721cefa31a9SFlorian Westphal #ifdef CONFIG_MODULES 1722cefa31a9SFlorian Westphal __printf(2, 3) int nft_request_module(struct net *net, const char *fmt, ...); 1723cefa31a9SFlorian Westphal #else 1724cefa31a9SFlorian Westphal static inline int nft_request_module(struct net *net, const char *fmt, ...) { return -ENOENT; } 1725cefa31a9SFlorian Westphal #endif 17260854db2aSFlorian Westphal 17270854db2aSFlorian Westphal struct nftables_pernet { 17280854db2aSFlorian Westphal struct list_head tables; 17290854db2aSFlorian Westphal struct list_head commit_list; 1730938154b9SPablo Neira Ayuso struct list_head binding_list; 17310854db2aSFlorian Westphal struct list_head module_list; 17320854db2aSFlorian Westphal struct list_head notify_list; 17330854db2aSFlorian Westphal struct mutex commit_mutex; 1734ab482c6bSPablo Neira Ayuso u64 table_handle; 17350854db2aSFlorian Westphal unsigned int base_seq; 17365f68718bSPablo Neira Ayuso unsigned int gc_seq; 17374b80ced9SFlorian Westphal u8 validate_state; 17380854db2aSFlorian Westphal }; 17390854db2aSFlorian Westphal 1740d59d2f82SPablo Neira Ayuso extern unsigned int nf_tables_net_id; 1741d59d2f82SPablo Neira Ayuso 1742d59d2f82SPablo Neira Ayuso static inline struct nftables_pernet *nft_pernet(const struct net *net) 1743d59d2f82SPablo Neira Ayuso { 1744d59d2f82SPablo Neira Ayuso return net_generic(net, nf_tables_net_id); 1745d59d2f82SPablo Neira Ayuso } 1746d59d2f82SPablo Neira Ayuso 1747b2d30654SPablo Neira Ayuso #define __NFT_REDUCE_READONLY 1UL 1748b2d30654SPablo Neira Ayuso #define NFT_REDUCE_READONLY (void *)__NFT_REDUCE_READONLY 1749b2d30654SPablo Neira Ayuso 1750b2d30654SPablo Neira Ayuso static inline bool nft_reduce_is_readonly(const struct nft_expr *expr) 1751b2d30654SPablo Neira Ayuso { 1752b2d30654SPablo Neira Ayuso return expr->ops->reduce == NFT_REDUCE_READONLY; 1753b2d30654SPablo Neira Ayuso } 1754b2d30654SPablo Neira Ayuso 175534cc9e52SPablo Neira Ayuso void nft_reg_track_update(struct nft_regs_track *track, 175634cc9e52SPablo Neira Ayuso const struct nft_expr *expr, u8 dreg, u8 len); 175734cc9e52SPablo Neira Ayuso void nft_reg_track_cancel(struct nft_regs_track *track, u8 dreg, u8 len); 175834cc9e52SPablo Neira Ayuso void __nft_reg_track_cancel(struct nft_regs_track *track, u8 dreg); 175934cc9e52SPablo Neira Ayuso 176034cc9e52SPablo Neira Ayuso static inline bool nft_reg_track_cmp(struct nft_regs_track *track, 176134cc9e52SPablo Neira Ayuso const struct nft_expr *expr, u8 dreg) 176234cc9e52SPablo Neira Ayuso { 176334cc9e52SPablo Neira Ayuso return track->regs[dreg].selector && 176434cc9e52SPablo Neira Ayuso track->regs[dreg].selector->ops == expr->ops && 176534cc9e52SPablo Neira Ayuso track->regs[dreg].num_reg == 0; 176634cc9e52SPablo Neira Ayuso } 176734cc9e52SPablo Neira Ayuso 176896518518SPatrick McHardy #endif /* _NET_NF_TABLES_H */ 1769