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); 46520a69341SPatrick McHardy 4664ef360ddSTaehee Yoo u64 (*privsize)(const struct nlattr * const nla[], 467347b408dSPablo Neira Ayuso const struct nft_set_desc *desc); 468c50b960cSPatrick McHardy bool (*estimate)(const struct nft_set_desc *desc, 469c50b960cSPatrick McHardy u32 features, 470c50b960cSPatrick McHardy struct nft_set_estimate *est); 47120a69341SPatrick McHardy int (*init)(const struct nft_set *set, 472c50b960cSPatrick McHardy const struct nft_set_desc *desc, 47320a69341SPatrick McHardy const struct nlattr * const nla[]); 47420a69341SPatrick McHardy void (*destroy)(const struct nft_set *set); 47579b174adSPablo Neira Ayuso void (*gc_init)(const struct nft_set *set); 47620a69341SPatrick McHardy 477fe2811ebSPatrick McHardy unsigned int elemsize; 47820a69341SPatrick McHardy }; 47920a69341SPatrick McHardy 48071cc0873SPhil Sutter /** 48171cc0873SPhil Sutter * struct nft_set_type - nf_tables set type 48271cc0873SPhil Sutter * 48371cc0873SPhil Sutter * @ops: set ops for this type 48471cc0873SPhil Sutter * @features: features supported by the implementation 48571cc0873SPhil Sutter */ 48671cc0873SPhil Sutter struct nft_set_type { 48771cc0873SPhil Sutter const struct nft_set_ops ops; 48871cc0873SPhil Sutter u32 features; 48971cc0873SPhil Sutter }; 49071cc0873SPhil Sutter #define to_set_type(o) container_of(o, struct nft_set_type, ops) 49171cc0873SPhil Sutter 492563125a7SPablo Neira Ayuso struct nft_set_elem_expr { 493563125a7SPablo Neira Ayuso u8 size; 494563125a7SPablo Neira Ayuso unsigned char data[] 495563125a7SPablo Neira Ayuso __attribute__((aligned(__alignof__(struct nft_expr)))); 496563125a7SPablo Neira Ayuso }; 497563125a7SPablo Neira Ayuso 498563125a7SPablo Neira Ayuso #define nft_setelem_expr_at(__elem_expr, __offset) \ 499563125a7SPablo Neira Ayuso ((struct nft_expr *)&__elem_expr->data[__offset]) 500563125a7SPablo Neira Ayuso 501563125a7SPablo Neira Ayuso #define nft_setelem_expr_foreach(__expr, __elem_expr, __size) \ 502563125a7SPablo Neira Ayuso for (__expr = nft_setelem_expr_at(__elem_expr, 0), __size = 0; \ 503563125a7SPablo Neira Ayuso __size < (__elem_expr)->size; \ 504563125a7SPablo Neira Ayuso __size += (__expr)->ops->size, __expr = ((void *)(__expr)) + (__expr)->ops->size) 505563125a7SPablo Neira Ayuso 5068cfd9b0fSPablo Neira Ayuso #define NFT_SET_EXPR_MAX 2 5078cfd9b0fSPablo Neira Ayuso 50820a69341SPatrick McHardy /** 50920a69341SPatrick McHardy * struct nft_set - nf_tables set instance 51020a69341SPatrick McHardy * 51120a69341SPatrick McHardy * @list: table set list node 51220a69341SPatrick McHardy * @bindings: list of set bindings 5133453c927SPablo Neira Ayuso * @table: table this set belongs to 5143453c927SPablo Neira Ayuso * @net: netnamespace this set belongs to 51520a69341SPatrick McHardy * @name: name of the set 5163ecbfd65SHarsha Sharma * @handle: unique handle of the set 51720a69341SPatrick McHardy * @ktype: key type (numeric type defined by userspace, not used in the kernel) 51820a69341SPatrick McHardy * @dtype: data type (verdict or numeric type defined by userspace) 5198aeff920SPablo Neira Ayuso * @objtype: object type (see NFT_OBJECT_* definitions) 520c50b960cSPatrick McHardy * @size: maximum set size 521f3a2181eSStefano Brivio * @field_len: length of each field in concatenation, bytes 522f3a2181eSStefano Brivio * @field_count: number of concatenated fields in element 523273fe3f1SPablo Neira Ayuso * @use: number of rules references to this set 524c50b960cSPatrick McHardy * @nelems: number of elements 5253dd0673aSPatrick McHardy * @ndeact: number of deactivated elements queued for removal 526d3e2a111SAnders K. Pedersen * @timeout: default timeout value in jiffies 527761da293SPatrick McHardy * @gc_int: garbage collection interval in msecs 5289363dc4bSArturo Borrero * @policy: set parameterization (see enum nft_set_policies) 529e6d8ecacSCarlos Falgueras García * @udlen: user data length 530e6d8ecacSCarlos Falgueras García * @udata: user data 53165038428SPablo Neira Ayuso * @expr: stateful expression 53220a69341SPatrick McHardy * @ops: set ops 53320a69341SPatrick McHardy * @flags: set flags 53437a9cc52SPablo Neira Ayuso * @genmask: generation mask 53520a69341SPatrick McHardy * @klen: key length 53620a69341SPatrick McHardy * @dlen: data length 53720a69341SPatrick McHardy * @data: private set data 53820a69341SPatrick McHardy */ 53920a69341SPatrick McHardy struct nft_set { 54020a69341SPatrick McHardy struct list_head list; 54120a69341SPatrick McHardy struct list_head bindings; 5423453c927SPablo Neira Ayuso struct nft_table *table; 5433453c927SPablo Neira Ayuso possible_net_t net; 54438745490SPhil Sutter char *name; 5453ecbfd65SHarsha Sharma u64 handle; 54620a69341SPatrick McHardy u32 ktype; 54720a69341SPatrick McHardy u32 dtype; 5488aeff920SPablo Neira Ayuso u32 objtype; 549c50b960cSPatrick McHardy u32 size; 550f3a2181eSStefano Brivio u8 field_len[NFT_REG32_COUNT]; 551f3a2181eSStefano Brivio u8 field_count; 552273fe3f1SPablo Neira Ayuso u32 use; 5533dd0673aSPatrick McHardy atomic_t nelems; 5543dd0673aSPatrick McHardy u32 ndeact; 555761da293SPatrick McHardy u64 timeout; 556761da293SPatrick McHardy u32 gc_int; 5579363dc4bSArturo Borrero u16 policy; 558e6d8ecacSCarlos Falgueras García u16 udlen; 559e6d8ecacSCarlos Falgueras García unsigned char *udata; 56020a69341SPatrick McHardy /* runtime data below here */ 56120a69341SPatrick McHardy const struct nft_set_ops *ops ____cacheline_aligned; 5626a0a8d10SPablo Neira Ayuso u16 flags:14, 56337a9cc52SPablo Neira Ayuso genmask:2; 56420a69341SPatrick McHardy u8 klen; 56520a69341SPatrick McHardy u8 dlen; 5668cfd9b0fSPablo Neira Ayuso u8 num_exprs; 5678cfd9b0fSPablo Neira Ayuso struct nft_expr *exprs[NFT_SET_EXPR_MAX]; 568aaa31047SPablo Neira Ayuso struct list_head catchall_list; 56920a69341SPatrick McHardy unsigned char data[] 57020a69341SPatrick McHardy __attribute__((aligned(__alignof__(u64)))); 57120a69341SPatrick McHardy }; 57220a69341SPatrick McHardy 573408070d6SPablo Neira Ayuso static inline bool nft_set_is_anonymous(const struct nft_set *set) 574408070d6SPablo Neira Ayuso { 575408070d6SPablo Neira Ayuso return set->flags & NFT_SET_ANONYMOUS; 576408070d6SPablo Neira Ayuso } 577408070d6SPablo Neira Ayuso 57820a69341SPatrick McHardy static inline void *nft_set_priv(const struct nft_set *set) 57920a69341SPatrick McHardy { 58020a69341SPatrick McHardy return (void *)set->data; 58120a69341SPatrick McHardy } 58220a69341SPatrick McHardy 5839d098292SPatrick McHardy static inline struct nft_set *nft_set_container_of(const void *priv) 5849d098292SPatrick McHardy { 5859d098292SPatrick McHardy return (void *)priv - offsetof(struct nft_set, data); 5869d098292SPatrick McHardy } 5879d098292SPatrick McHardy 58810659cbaSPablo Neira Ayuso struct nft_set *nft_set_lookup_global(const struct net *net, 589c7a72e3fSPablo Neira Ayuso const struct nft_table *table, 590c7a72e3fSPablo Neira Ayuso const struct nlattr *nla_set_name, 591c7a72e3fSPablo Neira Ayuso const struct nlattr *nla_set_id, 592c7a72e3fSPablo Neira Ayuso u8 genmask); 59320a69341SPatrick McHardy 594aaa31047SPablo Neira Ayuso struct nft_set_ext *nft_set_catchall_lookup(const struct net *net, 595aaa31047SPablo Neira Ayuso const struct nft_set *set); 596aaa31047SPablo Neira Ayuso void *nft_set_catchall_gc(const struct nft_set *set); 597aaa31047SPablo Neira Ayuso 598761da293SPatrick McHardy static inline unsigned long nft_set_gc_interval(const struct nft_set *set) 599761da293SPatrick McHardy { 600123b9961SPablo Neira Ayuso u32 gc_int = READ_ONCE(set->gc_int); 601123b9961SPablo Neira Ayuso 602123b9961SPablo Neira Ayuso return gc_int ? msecs_to_jiffies(gc_int) : HZ; 603761da293SPatrick McHardy } 604761da293SPatrick McHardy 60520a69341SPatrick McHardy /** 60620a69341SPatrick McHardy * struct nft_set_binding - nf_tables set binding 60720a69341SPatrick McHardy * 60820a69341SPatrick McHardy * @list: set bindings list node 60920a69341SPatrick McHardy * @chain: chain containing the rule bound to the set 61011113e19SPatrick McHardy * @flags: set action flags 61120a69341SPatrick McHardy * 61220a69341SPatrick McHardy * A set binding contains all information necessary for validation 61320a69341SPatrick McHardy * of new elements added to a bound set. 61420a69341SPatrick McHardy */ 61520a69341SPatrick McHardy struct nft_set_binding { 61620a69341SPatrick McHardy struct list_head list; 61720a69341SPatrick McHardy const struct nft_chain *chain; 61811113e19SPatrick McHardy u32 flags; 61920a69341SPatrick McHardy }; 62020a69341SPatrick McHardy 621273fe3f1SPablo Neira Ayuso enum nft_trans_phase; 622273fe3f1SPablo Neira Ayuso void nf_tables_deactivate_set(const struct nft_ctx *ctx, struct nft_set *set, 623273fe3f1SPablo Neira Ayuso struct nft_set_binding *binding, 624273fe3f1SPablo Neira Ayuso enum nft_trans_phase phase); 6255eccdfaaSJoe Perches int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set, 62620a69341SPatrick McHardy struct nft_set_binding *binding); 627cd5125d8SFlorian Westphal void nf_tables_destroy_set(const struct nft_ctx *ctx, struct nft_set *set); 62820a69341SPatrick McHardy 6293ac4c07aSPatrick McHardy /** 6303ac4c07aSPatrick McHardy * enum nft_set_extensions - set extension type IDs 6313ac4c07aSPatrick McHardy * 6323ac4c07aSPatrick McHardy * @NFT_SET_EXT_KEY: element key 6337b225d0bSPablo Neira Ayuso * @NFT_SET_EXT_KEY_END: upper bound element key, for ranges 6343ac4c07aSPatrick McHardy * @NFT_SET_EXT_DATA: mapping data 6353ac4c07aSPatrick McHardy * @NFT_SET_EXT_FLAGS: element flags 636c3e1b005SPatrick McHardy * @NFT_SET_EXT_TIMEOUT: element timeout 637c3e1b005SPatrick McHardy * @NFT_SET_EXT_EXPIRATION: element expiration time 63868e942e8SPatrick McHardy * @NFT_SET_EXT_USERDATA: user data associated with the element 639563125a7SPablo Neira Ayuso * @NFT_SET_EXT_EXPRESSIONS: expressions assiciated with the element 6408aeff920SPablo Neira Ayuso * @NFT_SET_EXT_OBJREF: stateful object reference associated with element 6413ac4c07aSPatrick McHardy * @NFT_SET_EXT_NUM: number of extension types 6423ac4c07aSPatrick McHardy */ 6433ac4c07aSPatrick McHardy enum nft_set_extensions { 6443ac4c07aSPatrick McHardy NFT_SET_EXT_KEY, 6457b225d0bSPablo Neira Ayuso NFT_SET_EXT_KEY_END, 6463ac4c07aSPatrick McHardy NFT_SET_EXT_DATA, 6473ac4c07aSPatrick McHardy NFT_SET_EXT_FLAGS, 648c3e1b005SPatrick McHardy NFT_SET_EXT_TIMEOUT, 649c3e1b005SPatrick McHardy NFT_SET_EXT_EXPIRATION, 65068e942e8SPatrick McHardy NFT_SET_EXT_USERDATA, 651563125a7SPablo Neira Ayuso NFT_SET_EXT_EXPRESSIONS, 6528aeff920SPablo Neira Ayuso NFT_SET_EXT_OBJREF, 6533ac4c07aSPatrick McHardy NFT_SET_EXT_NUM 6543ac4c07aSPatrick McHardy }; 6553ac4c07aSPatrick McHardy 6563ac4c07aSPatrick McHardy /** 6573ac4c07aSPatrick McHardy * struct nft_set_ext_type - set extension type 6583ac4c07aSPatrick McHardy * 6593ac4c07aSPatrick McHardy * @len: fixed part length of the extension 6603ac4c07aSPatrick McHardy * @align: alignment requirements of the extension 6613ac4c07aSPatrick McHardy */ 6623ac4c07aSPatrick McHardy struct nft_set_ext_type { 6633ac4c07aSPatrick McHardy u8 len; 6643ac4c07aSPatrick McHardy u8 align; 6653ac4c07aSPatrick McHardy }; 6663ac4c07aSPatrick McHardy 6673ac4c07aSPatrick McHardy extern const struct nft_set_ext_type nft_set_ext_types[]; 6683ac4c07aSPatrick McHardy 6693ac4c07aSPatrick McHardy /** 6703ac4c07aSPatrick McHardy * struct nft_set_ext_tmpl - set extension template 6713ac4c07aSPatrick McHardy * 6723ac4c07aSPatrick McHardy * @len: length of extension area 6733ac4c07aSPatrick McHardy * @offset: offsets of individual extension types 6743ac4c07aSPatrick McHardy */ 6753ac4c07aSPatrick McHardy struct nft_set_ext_tmpl { 6763ac4c07aSPatrick McHardy u16 len; 6773ac4c07aSPatrick McHardy u8 offset[NFT_SET_EXT_NUM]; 67834aae2c2SPablo Neira Ayuso u8 ext_len[NFT_SET_EXT_NUM]; 6793ac4c07aSPatrick McHardy }; 6803ac4c07aSPatrick McHardy 6813ac4c07aSPatrick McHardy /** 6823ac4c07aSPatrick McHardy * struct nft_set_ext - set extensions 6833ac4c07aSPatrick McHardy * 684cc02e457SPatrick McHardy * @genmask: generation mask 6853ac4c07aSPatrick McHardy * @offset: offsets of individual extension types 6863ac4c07aSPatrick McHardy * @data: beginning of extension data 6873ac4c07aSPatrick McHardy */ 6883ac4c07aSPatrick McHardy struct nft_set_ext { 689cc02e457SPatrick McHardy u8 genmask; 6903ac4c07aSPatrick McHardy u8 offset[NFT_SET_EXT_NUM]; 6916daf1414SGustavo A. R. Silva char data[]; 6923ac4c07aSPatrick McHardy }; 6933ac4c07aSPatrick McHardy 6943ac4c07aSPatrick McHardy static inline void nft_set_ext_prepare(struct nft_set_ext_tmpl *tmpl) 6953ac4c07aSPatrick McHardy { 6963ac4c07aSPatrick McHardy memset(tmpl, 0, sizeof(*tmpl)); 6973ac4c07aSPatrick McHardy tmpl->len = sizeof(struct nft_set_ext); 6983ac4c07aSPatrick McHardy } 6993ac4c07aSPatrick McHardy 700c39ba4deSPablo Neira Ayuso static inline int nft_set_ext_add_length(struct nft_set_ext_tmpl *tmpl, u8 id, 7013ac4c07aSPatrick McHardy unsigned int len) 7023ac4c07aSPatrick McHardy { 7033ac4c07aSPatrick McHardy tmpl->len = ALIGN(tmpl->len, nft_set_ext_types[id].align); 704c39ba4deSPablo Neira Ayuso if (tmpl->len > U8_MAX) 705c39ba4deSPablo Neira Ayuso return -EINVAL; 706c39ba4deSPablo Neira Ayuso 7073ac4c07aSPatrick McHardy tmpl->offset[id] = tmpl->len; 70834aae2c2SPablo Neira Ayuso tmpl->ext_len[id] = nft_set_ext_types[id].len + len; 70934aae2c2SPablo Neira Ayuso tmpl->len += tmpl->ext_len[id]; 710c39ba4deSPablo Neira Ayuso 711c39ba4deSPablo Neira Ayuso return 0; 7123ac4c07aSPatrick McHardy } 7133ac4c07aSPatrick McHardy 714c39ba4deSPablo Neira Ayuso static inline int nft_set_ext_add(struct nft_set_ext_tmpl *tmpl, u8 id) 7153ac4c07aSPatrick McHardy { 716c39ba4deSPablo Neira Ayuso return nft_set_ext_add_length(tmpl, id, 0); 7173ac4c07aSPatrick McHardy } 7183ac4c07aSPatrick McHardy 7193ac4c07aSPatrick McHardy static inline void nft_set_ext_init(struct nft_set_ext *ext, 7203ac4c07aSPatrick McHardy const struct nft_set_ext_tmpl *tmpl) 7213ac4c07aSPatrick McHardy { 7223ac4c07aSPatrick McHardy memcpy(ext->offset, tmpl->offset, sizeof(ext->offset)); 7233ac4c07aSPatrick McHardy } 7243ac4c07aSPatrick McHardy 7253ac4c07aSPatrick McHardy static inline bool __nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) 7263ac4c07aSPatrick McHardy { 7273ac4c07aSPatrick McHardy return !!ext->offset[id]; 7283ac4c07aSPatrick McHardy } 7293ac4c07aSPatrick McHardy 7303ac4c07aSPatrick McHardy static inline bool nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) 7313ac4c07aSPatrick McHardy { 7323ac4c07aSPatrick McHardy return ext && __nft_set_ext_exists(ext, id); 7333ac4c07aSPatrick McHardy } 7343ac4c07aSPatrick McHardy 7353ac4c07aSPatrick McHardy static inline void *nft_set_ext(const struct nft_set_ext *ext, u8 id) 7363ac4c07aSPatrick McHardy { 7373ac4c07aSPatrick McHardy return (void *)ext + ext->offset[id]; 7383ac4c07aSPatrick McHardy } 7393ac4c07aSPatrick McHardy 7403ac4c07aSPatrick McHardy static inline struct nft_data *nft_set_ext_key(const struct nft_set_ext *ext) 7413ac4c07aSPatrick McHardy { 7423ac4c07aSPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_KEY); 7433ac4c07aSPatrick McHardy } 7443ac4c07aSPatrick McHardy 7457b225d0bSPablo Neira Ayuso static inline struct nft_data *nft_set_ext_key_end(const struct nft_set_ext *ext) 7467b225d0bSPablo Neira Ayuso { 7477b225d0bSPablo Neira Ayuso return nft_set_ext(ext, NFT_SET_EXT_KEY_END); 7487b225d0bSPablo Neira Ayuso } 7497b225d0bSPablo Neira Ayuso 7503ac4c07aSPatrick McHardy static inline struct nft_data *nft_set_ext_data(const struct nft_set_ext *ext) 7513ac4c07aSPatrick McHardy { 7523ac4c07aSPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_DATA); 7533ac4c07aSPatrick McHardy } 7543ac4c07aSPatrick McHardy 7553ac4c07aSPatrick McHardy static inline u8 *nft_set_ext_flags(const struct nft_set_ext *ext) 7563ac4c07aSPatrick McHardy { 7573ac4c07aSPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_FLAGS); 7583ac4c07aSPatrick McHardy } 759ef1f7df9SPatrick McHardy 760c3e1b005SPatrick McHardy static inline u64 *nft_set_ext_timeout(const struct nft_set_ext *ext) 761c3e1b005SPatrick McHardy { 762c3e1b005SPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_TIMEOUT); 763c3e1b005SPatrick McHardy } 764c3e1b005SPatrick McHardy 7658e1102d5SFlorian Westphal static inline u64 *nft_set_ext_expiration(const struct nft_set_ext *ext) 766c3e1b005SPatrick McHardy { 767c3e1b005SPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_EXPIRATION); 768c3e1b005SPatrick McHardy } 769c3e1b005SPatrick McHardy 77068e942e8SPatrick McHardy static inline struct nft_userdata *nft_set_ext_userdata(const struct nft_set_ext *ext) 77168e942e8SPatrick McHardy { 77268e942e8SPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_USERDATA); 77368e942e8SPatrick McHardy } 77468e942e8SPatrick McHardy 775563125a7SPablo Neira Ayuso static inline struct nft_set_elem_expr *nft_set_ext_expr(const struct nft_set_ext *ext) 776f25ad2e9SPatrick McHardy { 777563125a7SPablo Neira Ayuso return nft_set_ext(ext, NFT_SET_EXT_EXPRESSIONS); 778f25ad2e9SPatrick McHardy } 779f25ad2e9SPatrick McHardy 780c3e1b005SPatrick McHardy static inline bool nft_set_elem_expired(const struct nft_set_ext *ext) 781c3e1b005SPatrick McHardy { 782c3e1b005SPatrick McHardy return nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION) && 7838e1102d5SFlorian Westphal time_is_before_eq_jiffies64(*nft_set_ext_expiration(ext)); 784c3e1b005SPatrick McHardy } 785c3e1b005SPatrick McHardy 786fe2811ebSPatrick McHardy static inline struct nft_set_ext *nft_set_elem_ext(const struct nft_set *set, 787fe2811ebSPatrick McHardy void *elem) 788fe2811ebSPatrick McHardy { 789fe2811ebSPatrick McHardy return elem + set->ops->elemsize; 790fe2811ebSPatrick McHardy } 791fe2811ebSPatrick McHardy 7928aeff920SPablo Neira Ayuso static inline struct nft_object **nft_set_ext_obj(const struct nft_set_ext *ext) 7938aeff920SPablo Neira Ayuso { 7948aeff920SPablo Neira Ayuso return nft_set_ext(ext, NFT_SET_EXT_OBJREF); 7958aeff920SPablo Neira Ayuso } 7968aeff920SPablo Neira Ayuso 797a7fc9368SPablo Neira Ayuso struct nft_expr *nft_set_elem_expr_alloc(const struct nft_ctx *ctx, 798a7fc9368SPablo Neira Ayuso const struct nft_set *set, 799a7fc9368SPablo Neira Ayuso const struct nlattr *attr); 800a7fc9368SPablo Neira Ayuso 80122fe54d5SPatrick McHardy void *nft_set_elem_init(const struct nft_set *set, 80222fe54d5SPatrick McHardy const struct nft_set_ext_tmpl *tmpl, 8037b225d0bSPablo Neira Ayuso const u32 *key, const u32 *key_end, const u32 *data, 80479ebb5bbSLaura Garcia Liebana u64 timeout, u64 expiration, gfp_t gfp); 805fca05d4dSPablo Neira Ayuso int nft_set_elem_expr_clone(const struct nft_ctx *ctx, struct nft_set *set, 806fca05d4dSPablo Neira Ayuso struct nft_expr *expr_array[]); 80761f9e292SLiping Zhang void nft_set_elem_destroy(const struct nft_set *set, void *elem, 80861f9e292SLiping Zhang bool destroy_expr); 80961edafbbSPatrick McHardy 81020a69341SPatrick McHardy /** 811cfed7e1bSPatrick McHardy * struct nft_set_gc_batch_head - nf_tables set garbage collection batch 812cfed7e1bSPatrick McHardy * 813cfed7e1bSPatrick McHardy * @rcu: rcu head 814cfed7e1bSPatrick McHardy * @set: set the elements belong to 815cfed7e1bSPatrick McHardy * @cnt: count of elements 816cfed7e1bSPatrick McHardy */ 817cfed7e1bSPatrick McHardy struct nft_set_gc_batch_head { 818cfed7e1bSPatrick McHardy struct rcu_head rcu; 819cfed7e1bSPatrick McHardy const struct nft_set *set; 820cfed7e1bSPatrick McHardy unsigned int cnt; 821cfed7e1bSPatrick McHardy }; 822cfed7e1bSPatrick McHardy 823cfed7e1bSPatrick McHardy #define NFT_SET_GC_BATCH_SIZE ((PAGE_SIZE - \ 824cfed7e1bSPatrick McHardy sizeof(struct nft_set_gc_batch_head)) / \ 825cfed7e1bSPatrick McHardy sizeof(void *)) 826cfed7e1bSPatrick McHardy 827cfed7e1bSPatrick McHardy /** 828cfed7e1bSPatrick McHardy * struct nft_set_gc_batch - nf_tables set garbage collection batch 829cfed7e1bSPatrick McHardy * 830cfed7e1bSPatrick McHardy * @head: GC batch head 831cfed7e1bSPatrick McHardy * @elems: garbage collection elements 832cfed7e1bSPatrick McHardy */ 833cfed7e1bSPatrick McHardy struct nft_set_gc_batch { 834cfed7e1bSPatrick McHardy struct nft_set_gc_batch_head head; 835cfed7e1bSPatrick McHardy void *elems[NFT_SET_GC_BATCH_SIZE]; 836cfed7e1bSPatrick McHardy }; 837cfed7e1bSPatrick McHardy 838cfed7e1bSPatrick McHardy struct nft_set_gc_batch *nft_set_gc_batch_alloc(const struct nft_set *set, 839cfed7e1bSPatrick McHardy gfp_t gfp); 840cfed7e1bSPatrick McHardy void nft_set_gc_batch_release(struct rcu_head *rcu); 841cfed7e1bSPatrick McHardy 842cfed7e1bSPatrick McHardy static inline void nft_set_gc_batch_complete(struct nft_set_gc_batch *gcb) 843cfed7e1bSPatrick McHardy { 844cfed7e1bSPatrick McHardy if (gcb != NULL) 845cfed7e1bSPatrick McHardy call_rcu(&gcb->head.rcu, nft_set_gc_batch_release); 846cfed7e1bSPatrick McHardy } 847cfed7e1bSPatrick McHardy 848cfed7e1bSPatrick McHardy static inline struct nft_set_gc_batch * 849cfed7e1bSPatrick McHardy nft_set_gc_batch_check(const struct nft_set *set, struct nft_set_gc_batch *gcb, 850cfed7e1bSPatrick McHardy gfp_t gfp) 851cfed7e1bSPatrick McHardy { 852cfed7e1bSPatrick McHardy if (gcb != NULL) { 853cfed7e1bSPatrick McHardy if (gcb->head.cnt + 1 < ARRAY_SIZE(gcb->elems)) 854cfed7e1bSPatrick McHardy return gcb; 855cfed7e1bSPatrick McHardy nft_set_gc_batch_complete(gcb); 856cfed7e1bSPatrick McHardy } 857cfed7e1bSPatrick McHardy return nft_set_gc_batch_alloc(set, gfp); 858cfed7e1bSPatrick McHardy } 859cfed7e1bSPatrick McHardy 860cfed7e1bSPatrick McHardy static inline void nft_set_gc_batch_add(struct nft_set_gc_batch *gcb, 861cfed7e1bSPatrick McHardy void *elem) 862cfed7e1bSPatrick McHardy { 863cfed7e1bSPatrick McHardy gcb->elems[gcb->head.cnt++] = elem; 864cfed7e1bSPatrick McHardy } 865cfed7e1bSPatrick McHardy 866b8e20400SPablo Neira Ayuso struct nft_expr_ops; 867cfed7e1bSPatrick McHardy /** 868ef1f7df9SPatrick McHardy * struct nft_expr_type - nf_tables expression type 86996518518SPatrick McHardy * 870ef1f7df9SPatrick McHardy * @select_ops: function to select nft_expr_ops 871b8e20400SPablo Neira Ayuso * @release_ops: release nft_expr_ops 872ef1f7df9SPatrick McHardy * @ops: default ops, used when no select_ops functions is present 87396518518SPatrick McHardy * @list: used internally 87496518518SPatrick McHardy * @name: Identifier 87596518518SPatrick McHardy * @owner: module reference 87696518518SPatrick McHardy * @policy: netlink attribute policy 87796518518SPatrick McHardy * @maxattr: highest netlink attribute number 87864d46806SPatrick McHardy * @family: address family for AF-specific types 879151d799aSPatrick McHardy * @flags: expression type flags 880ef1f7df9SPatrick McHardy */ 881ef1f7df9SPatrick McHardy struct nft_expr_type { 8820ca743a5SPablo Neira Ayuso const struct nft_expr_ops *(*select_ops)(const struct nft_ctx *, 8830ca743a5SPablo Neira Ayuso const struct nlattr * const tb[]); 884b8e20400SPablo Neira Ayuso void (*release_ops)(const struct nft_expr_ops *ops); 885ef1f7df9SPatrick McHardy const struct nft_expr_ops *ops; 8863a07327dSPablo Neira Ayuso const struct nft_expr_ops *inner_ops; 887ef1f7df9SPatrick McHardy struct list_head list; 888ef1f7df9SPatrick McHardy const char *name; 889ef1f7df9SPatrick McHardy struct module *owner; 890ef1f7df9SPatrick McHardy const struct nla_policy *policy; 891ef1f7df9SPatrick McHardy unsigned int maxattr; 89264d46806SPatrick McHardy u8 family; 893151d799aSPatrick McHardy u8 flags; 894ef1f7df9SPatrick McHardy }; 895ef1f7df9SPatrick McHardy 896151d799aSPatrick McHardy #define NFT_EXPR_STATEFUL 0x1 89779b174adSPablo Neira Ayuso #define NFT_EXPR_GC 0x2 898151d799aSPatrick McHardy 899f6ac8585SPablo Neira Ayuso enum nft_trans_phase { 900f6ac8585SPablo Neira Ayuso NFT_TRANS_PREPARE, 901f6ac8585SPablo Neira Ayuso NFT_TRANS_ABORT, 902f6ac8585SPablo Neira Ayuso NFT_TRANS_COMMIT, 903f6ac8585SPablo Neira Ayuso NFT_TRANS_RELEASE 904f6ac8585SPablo Neira Ayuso }; 905f6ac8585SPablo Neira Ayuso 906c9626a2cSPablo Neira Ayuso struct nft_flow_rule; 907c9626a2cSPablo Neira Ayuso struct nft_offload_ctx; 908c9626a2cSPablo Neira Ayuso 909ef1f7df9SPatrick McHardy /** 910ef1f7df9SPatrick McHardy * struct nft_expr_ops - nf_tables expression operations 911ef1f7df9SPatrick McHardy * 912ef1f7df9SPatrick McHardy * @eval: Expression evaluation function 91396518518SPatrick McHardy * @size: full expression size, including private data size 914ef1f7df9SPatrick McHardy * @init: initialization function 915cd5125d8SFlorian Westphal * @activate: activate expression in the next generation 916cd5125d8SFlorian Westphal * @deactivate: deactivate expression in next generation 917cd5125d8SFlorian Westphal * @destroy: destruction function, called after synchronize_rcu 918ef1f7df9SPatrick McHardy * @dump: function to dump parameters 919ef1f7df9SPatrick McHardy * @type: expression type 9200ca743a5SPablo Neira Ayuso * @validate: validate expression, called during loop detection 9210ca743a5SPablo Neira Ayuso * @data: extra data to attach to this expression operation 92296518518SPatrick McHardy */ 92396518518SPatrick McHardy struct nft_expr_ops { 92496518518SPatrick McHardy void (*eval)(const struct nft_expr *expr, 925a55e22e9SPatrick McHardy struct nft_regs *regs, 92696518518SPatrick McHardy const struct nft_pktinfo *pkt); 927086f3321SPablo Neira Ayuso int (*clone)(struct nft_expr *dst, 928086f3321SPablo Neira Ayuso const struct nft_expr *src); 929ef1f7df9SPatrick McHardy unsigned int size; 930ef1f7df9SPatrick McHardy 93196518518SPatrick McHardy int (*init)(const struct nft_ctx *ctx, 93296518518SPatrick McHardy const struct nft_expr *expr, 93396518518SPatrick McHardy const struct nlattr * const tb[]); 934bb7b40aeSPablo Neira Ayuso void (*activate)(const struct nft_ctx *ctx, 935bb7b40aeSPablo Neira Ayuso const struct nft_expr *expr); 936bb7b40aeSPablo Neira Ayuso void (*deactivate)(const struct nft_ctx *ctx, 937f6ac8585SPablo Neira Ayuso const struct nft_expr *expr, 938f6ac8585SPablo Neira Ayuso enum nft_trans_phase phase); 93962472bceSPatrick McHardy void (*destroy)(const struct nft_ctx *ctx, 94062472bceSPatrick McHardy const struct nft_expr *expr); 941371ebcbbSPablo Neira Ayuso void (*destroy_clone)(const struct nft_ctx *ctx, 942371ebcbbSPablo Neira Ayuso const struct nft_expr *expr); 94396518518SPatrick McHardy int (*dump)(struct sk_buff *skb, 9447d34aa3eSPhil Sutter const struct nft_expr *expr, 9457d34aa3eSPhil Sutter bool reset); 9460ca743a5SPablo Neira Ayuso int (*validate)(const struct nft_ctx *ctx, 9470ca743a5SPablo Neira Ayuso const struct nft_expr *expr, 9480ca743a5SPablo Neira Ayuso const struct nft_data **data); 94912e4ecfaSPablo Neira Ayuso bool (*reduce)(struct nft_regs_track *track, 95012e4ecfaSPablo Neira Ayuso const struct nft_expr *expr); 95179b174adSPablo Neira Ayuso bool (*gc)(struct net *net, 95279b174adSPablo Neira Ayuso const struct nft_expr *expr); 953c9626a2cSPablo Neira Ayuso int (*offload)(struct nft_offload_ctx *ctx, 954c9626a2cSPablo Neira Ayuso struct nft_flow_rule *flow, 955c9626a2cSPablo Neira Ayuso const struct nft_expr *expr); 956b1a5983fSPablo Neira Ayuso bool (*offload_action)(const struct nft_expr *expr); 957b72920f6SPablo Neira Ayuso void (*offload_stats)(struct nft_expr *expr, 958b72920f6SPablo Neira Ayuso const struct flow_stats *stats); 959ef1f7df9SPatrick McHardy const struct nft_expr_type *type; 9600ca743a5SPablo Neira Ayuso void *data; 96196518518SPatrick McHardy }; 96296518518SPatrick McHardy 96396518518SPatrick McHardy /** 96496518518SPatrick McHardy * struct nft_rule - nf_tables rule 96596518518SPatrick McHardy * 96696518518SPatrick McHardy * @list: used internally 96796518518SPatrick McHardy * @handle: rule handle 9680628b123SPablo Neira Ayuso * @genmask: generation mask 96996518518SPatrick McHardy * @dlen: length of expression data 97086f1ec32SPatrick McHardy * @udata: user data is appended to the rule 97196518518SPatrick McHardy * @data: expression data 97296518518SPatrick McHardy */ 97396518518SPatrick McHardy struct nft_rule { 97496518518SPatrick McHardy struct list_head list; 9750768b3b3SPablo Neira Ayuso u64 handle:42, 9760628b123SPablo Neira Ayuso genmask:2, 9770768b3b3SPablo Neira Ayuso dlen:12, 97886f1ec32SPatrick McHardy udata:1; 97996518518SPatrick McHardy unsigned char data[] 98096518518SPatrick McHardy __attribute__((aligned(__alignof__(struct nft_expr)))); 98196518518SPatrick McHardy }; 98296518518SPatrick McHardy 98396518518SPatrick McHardy static inline struct nft_expr *nft_expr_first(const struct nft_rule *rule) 98496518518SPatrick McHardy { 98596518518SPatrick McHardy return (struct nft_expr *)&rule->data[0]; 98696518518SPatrick McHardy } 98796518518SPatrick McHardy 98896518518SPatrick McHardy static inline struct nft_expr *nft_expr_next(const struct nft_expr *expr) 98996518518SPatrick McHardy { 99096518518SPatrick McHardy return ((void *)expr) + expr->ops->size; 99196518518SPatrick McHardy } 99296518518SPatrick McHardy 99396518518SPatrick McHardy static inline struct nft_expr *nft_expr_last(const struct nft_rule *rule) 99496518518SPatrick McHardy { 99596518518SPatrick McHardy return (struct nft_expr *)&rule->data[rule->dlen]; 99696518518SPatrick McHardy } 99796518518SPatrick McHardy 99831cc578aSSaeed Mirzamohammadi static inline bool nft_expr_more(const struct nft_rule *rule, 99931cc578aSSaeed Mirzamohammadi const struct nft_expr *expr) 100031cc578aSSaeed Mirzamohammadi { 100131cc578aSSaeed Mirzamohammadi return expr != nft_expr_last(rule) && expr->ops; 100231cc578aSSaeed Mirzamohammadi } 100331cc578aSSaeed Mirzamohammadi 100486f1ec32SPatrick McHardy static inline struct nft_userdata *nft_userdata(const struct nft_rule *rule) 10050768b3b3SPablo Neira Ayuso { 10060768b3b3SPablo Neira Ayuso return (void *)&rule->data[rule->dlen]; 10070768b3b3SPablo Neira Ayuso } 10080768b3b3SPablo Neira Ayuso 1009d0e2c7deSPablo Neira Ayuso void nf_tables_rule_release(const struct nft_ctx *ctx, struct nft_rule *rule); 1010d0e2c7deSPablo Neira Ayuso 101176adfafeSPablo Neira Ayuso static inline void nft_set_elem_update_expr(const struct nft_set_ext *ext, 101276adfafeSPablo Neira Ayuso struct nft_regs *regs, 101376adfafeSPablo Neira Ayuso const struct nft_pktinfo *pkt) 101476adfafeSPablo Neira Ayuso { 1015563125a7SPablo Neira Ayuso struct nft_set_elem_expr *elem_expr; 101676adfafeSPablo Neira Ayuso struct nft_expr *expr; 1017563125a7SPablo Neira Ayuso u32 size; 101876adfafeSPablo Neira Ayuso 1019563125a7SPablo Neira Ayuso if (__nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS)) { 1020563125a7SPablo Neira Ayuso elem_expr = nft_set_ext_expr(ext); 1021563125a7SPablo Neira Ayuso nft_setelem_expr_foreach(expr, elem_expr, size) { 102276adfafeSPablo Neira Ayuso expr->ops->eval(expr, regs, pkt); 1023563125a7SPablo Neira Ayuso if (regs->verdict.code == NFT_BREAK) 1024563125a7SPablo Neira Ayuso return; 1025563125a7SPablo Neira Ayuso } 102676adfafeSPablo Neira Ayuso } 102776adfafeSPablo Neira Ayuso } 102876adfafeSPablo Neira Ayuso 102996518518SPatrick McHardy /* 103096518518SPatrick McHardy * The last pointer isn't really necessary, but the compiler isn't able to 103196518518SPatrick McHardy * determine that the result of nft_expr_last() is always the same since it 103296518518SPatrick McHardy * can't assume that the dlen value wasn't changed within calls in the loop. 103396518518SPatrick McHardy */ 103496518518SPatrick McHardy #define nft_rule_for_each_expr(expr, last, rule) \ 103596518518SPatrick McHardy for ((expr) = nft_expr_first(rule), (last) = nft_expr_last(rule); \ 103696518518SPatrick McHardy (expr) != (last); \ 103796518518SPatrick McHardy (expr) = nft_expr_next(expr)) 103896518518SPatrick McHardy 1039ad652f38SPablo Neira Ayuso #define NFT_CHAIN_POLICY_UNSET U8_MAX 1040ad652f38SPablo Neira Ayuso 10412c865a8aSPablo Neira Ayuso struct nft_rule_dp { 10422c865a8aSPablo Neira Ayuso u64 is_last:1, 10432c865a8aSPablo Neira Ayuso dlen:12, 10442c865a8aSPablo Neira Ayuso handle:42; /* for tracing */ 10452c865a8aSPablo Neira Ayuso unsigned char data[] 10462c865a8aSPablo Neira Ayuso __attribute__((aligned(__alignof__(struct nft_expr)))); 10472c865a8aSPablo Neira Ayuso }; 10482c865a8aSPablo Neira Ayuso 104963e9bbbcSFlorian Westphal struct nft_rule_dp_last { 105063e9bbbcSFlorian Westphal struct nft_rule_dp end; /* end of nft_rule_blob marker */ 105163e9bbbcSFlorian Westphal struct rcu_head h; /* call_rcu head */ 105263e9bbbcSFlorian Westphal struct nft_rule_blob *blob; /* ptr to free via call_rcu */ 105363e9bbbcSFlorian Westphal const struct nft_chain *chain; /* for nftables tracing */ 105463e9bbbcSFlorian Westphal }; 105563e9bbbcSFlorian Westphal 105663e9bbbcSFlorian Westphal static inline const struct nft_rule_dp *nft_rule_next(const struct nft_rule_dp *rule) 105763e9bbbcSFlorian Westphal { 105863e9bbbcSFlorian Westphal return (void *)rule + sizeof(*rule) + rule->dlen; 105963e9bbbcSFlorian Westphal } 106063e9bbbcSFlorian Westphal 10612c865a8aSPablo Neira Ayuso struct nft_rule_blob { 10622c865a8aSPablo Neira Ayuso unsigned long size; 10632c865a8aSPablo Neira Ayuso unsigned char data[] 10642c865a8aSPablo Neira Ayuso __attribute__((aligned(__alignof__(struct nft_rule_dp)))); 10652c865a8aSPablo Neira Ayuso }; 10662c865a8aSPablo Neira Ayuso 106796518518SPatrick McHardy /** 106896518518SPatrick McHardy * struct nft_chain - nf_tables chain 106996518518SPatrick McHardy * 107096518518SPatrick McHardy * @rules: list of rules in the chain 107196518518SPatrick McHardy * @list: used internally 10721b2470e5SFlorian Westphal * @rhlhead: used internally 1073b5bc89bfSPablo Neira Ayuso * @table: table that this chain belongs to 107496518518SPatrick McHardy * @handle: chain handle 107596518518SPatrick McHardy * @use: number of jump references to this chain 1076a0a7379eSPablo Neira Ayuso * @flags: bitmask of enum nft_chain_flags 107796518518SPatrick McHardy * @name: name of the chain 107896518518SPatrick McHardy */ 107996518518SPatrick McHardy struct nft_chain { 10802c865a8aSPablo Neira Ayuso struct nft_rule_blob __rcu *blob_gen_0; 10812c865a8aSPablo Neira Ayuso struct nft_rule_blob __rcu *blob_gen_1; 108296518518SPatrick McHardy struct list_head rules; 108396518518SPatrick McHardy struct list_head list; 10841b2470e5SFlorian Westphal struct rhlist_head rhlhead; 1085b5bc89bfSPablo Neira Ayuso struct nft_table *table; 108696518518SPatrick McHardy u64 handle; 1087a0a7379eSPablo Neira Ayuso u32 use; 1088d0e2c7deSPablo Neira Ayuso u8 flags:5, 1089d0e2c7deSPablo Neira Ayuso bound:1, 1090664b0f8cSPablo Neira Ayuso genmask:2; 1091b7263e07SPhil Sutter char *name; 1092002f2176SJose M. Guisado Gomez u16 udlen; 1093002f2176SJose M. Guisado Gomez u8 *udata; 10940cbc06b3SFlorian Westphal 10950cbc06b3SFlorian Westphal /* Only used during control plane commit phase: */ 10962c865a8aSPablo Neira Ayuso struct nft_rule_blob *blob_next; 109796518518SPatrick McHardy }; 109896518518SPatrick McHardy 1099a654de8fSPablo Neira Ayuso int nft_chain_validate(const struct nft_ctx *ctx, const struct nft_chain *chain); 1100d46fc894SPablo Neira Ayuso int nft_setelem_validate(const struct nft_ctx *ctx, struct nft_set *set, 1101d46fc894SPablo Neira Ayuso const struct nft_set_iter *iter, 1102d46fc894SPablo Neira Ayuso struct nft_set_elem *elem); 1103d46fc894SPablo Neira Ayuso int nft_set_catchall_validate(const struct nft_ctx *ctx, struct nft_set *set); 1104a654de8fSPablo Neira Ayuso 110532537e91SPablo Neira Ayuso enum nft_chain_types { 11069370761cSPablo Neira Ayuso NFT_CHAIN_T_DEFAULT = 0, 11079370761cSPablo Neira Ayuso NFT_CHAIN_T_ROUTE, 11089370761cSPablo Neira Ayuso NFT_CHAIN_T_NAT, 11099370761cSPablo Neira Ayuso NFT_CHAIN_T_MAX 11109370761cSPablo Neira Ayuso }; 11119370761cSPablo Neira Ayuso 11121a1e1a12SPatrick McHardy /** 111332537e91SPablo Neira Ayuso * struct nft_chain_type - nf_tables chain type info 11141a1e1a12SPatrick McHardy * 11151a1e1a12SPatrick McHardy * @name: name of the type 11161a1e1a12SPatrick McHardy * @type: numeric identifier 11171a1e1a12SPatrick McHardy * @family: address family 11181a1e1a12SPatrick McHardy * @owner: module owner 11191a1e1a12SPatrick McHardy * @hook_mask: mask of valid hooks 1120c2f9eafeSPablo Neira Ayuso * @hooks: array of hook functions 11214e25ceb8SFlorian Westphal * @ops_register: base chain register function 11224e25ceb8SFlorian Westphal * @ops_unregister: base chain unregister function 11231a1e1a12SPatrick McHardy */ 112432537e91SPablo Neira Ayuso struct nft_chain_type { 11251a1e1a12SPatrick McHardy const char *name; 112632537e91SPablo Neira Ayuso enum nft_chain_types type; 11271a1e1a12SPatrick McHardy int family; 11281a1e1a12SPatrick McHardy struct module *owner; 11291a1e1a12SPatrick McHardy unsigned int hook_mask; 1130d25e2e93SPablo Neira Ayuso nf_hookfn *hooks[NFT_MAX_HOOKS]; 11314e25ceb8SFlorian Westphal int (*ops_register)(struct net *net, const struct nf_hook_ops *ops); 11324e25ceb8SFlorian Westphal void (*ops_unregister)(struct net *net, const struct nf_hook_ops *ops); 11331a1e1a12SPatrick McHardy }; 11341a1e1a12SPatrick McHardy 11357210e4e3SPablo Neira Ayuso int nft_chain_validate_dependency(const struct nft_chain *chain, 113632537e91SPablo Neira Ayuso enum nft_chain_types type); 113775e8d06dSPablo Neira Ayuso int nft_chain_validate_hooks(const struct nft_chain *chain, 113875e8d06dSPablo Neira Ayuso unsigned int hook_flags); 11397210e4e3SPablo Neira Ayuso 1140d0e2c7deSPablo Neira Ayuso static inline bool nft_chain_is_bound(struct nft_chain *chain) 1141d0e2c7deSPablo Neira Ayuso { 1142d0e2c7deSPablo Neira Ayuso return (chain->flags & NFT_CHAIN_BINDING) && chain->bound; 1143d0e2c7deSPablo Neira Ayuso } 1144d0e2c7deSPablo Neira Ayuso 1145d0e2c7deSPablo Neira Ayuso void nft_chain_del(struct nft_chain *chain); 1146d0e2c7deSPablo Neira Ayuso void nf_tables_chain_destroy(struct nft_ctx *ctx); 1147d0e2c7deSPablo Neira Ayuso 11480ca743a5SPablo Neira Ayuso struct nft_stats { 11490ca743a5SPablo Neira Ayuso u64 bytes; 11500ca743a5SPablo Neira Ayuso u64 pkts; 1151ce355e20SEric Dumazet struct u64_stats_sync syncp; 11520ca743a5SPablo Neira Ayuso }; 11530ca743a5SPablo Neira Ayuso 11543f0465a9SPablo Neira Ayuso struct nft_hook { 11553f0465a9SPablo Neira Ayuso struct list_head list; 11563f0465a9SPablo Neira Ayuso struct nf_hook_ops ops; 11573f0465a9SPablo Neira Ayuso struct rcu_head rcu; 11583f0465a9SPablo Neira Ayuso }; 11593f0465a9SPablo Neira Ayuso 116096518518SPatrick McHardy /** 116196518518SPatrick McHardy * struct nft_base_chain - nf_tables base chain 116296518518SPatrick McHardy * 116396518518SPatrick McHardy * @ops: netfilter hook ops 1164d54725cdSPablo Neira Ayuso * @hook_list: list of netfilter hooks (for NFPROTO_NETDEV family) 11659370761cSPablo Neira Ayuso * @type: chain type 11660ca743a5SPablo Neira Ayuso * @policy: default policy 11670ca743a5SPablo Neira Ayuso * @stats: per-cpu chain stats 116896518518SPatrick McHardy * @chain: the chain 116914bfb13fSPablo Neira Ayuso * @flow_block: flow block (for hardware offload) 117096518518SPatrick McHardy */ 117196518518SPatrick McHardy struct nft_base_chain { 1172c974a3a3SPablo Neira Ayuso struct nf_hook_ops ops; 1173d54725cdSPablo Neira Ayuso struct list_head hook_list; 117432537e91SPablo Neira Ayuso const struct nft_chain_type *type; 11750ca743a5SPablo Neira Ayuso u8 policy; 1176835b8033SPablo Neira Ayuso u8 flags; 11770ca743a5SPablo Neira Ayuso struct nft_stats __percpu *stats; 117896518518SPatrick McHardy struct nft_chain chain; 117914bfb13fSPablo Neira Ayuso struct flow_block flow_block; 118096518518SPatrick McHardy }; 118196518518SPatrick McHardy 118296518518SPatrick McHardy static inline struct nft_base_chain *nft_base_chain(const struct nft_chain *chain) 118396518518SPatrick McHardy { 118496518518SPatrick McHardy return container_of(chain, struct nft_base_chain, chain); 118596518518SPatrick McHardy } 118696518518SPatrick McHardy 1187f323d954SPablo Neira Ayuso static inline bool nft_is_base_chain(const struct nft_chain *chain) 1188f323d954SPablo Neira Ayuso { 118967c49de4SPablo Neira Ayuso return chain->flags & NFT_CHAIN_BASE; 1190f323d954SPablo Neira Ayuso } 1191f323d954SPablo Neira Ayuso 11925ebe0b0eSPablo Neira Ayuso int __nft_release_basechain(struct nft_ctx *ctx); 1193835b8033SPablo Neira Ayuso 119406198b34SEric W. Biederman unsigned int nft_do_chain(struct nft_pktinfo *pkt, void *priv); 119596518518SPatrick McHardy 119696518518SPatrick McHardy /** 119796518518SPatrick McHardy * struct nft_table - nf_tables table 119896518518SPatrick McHardy * 119996518518SPatrick McHardy * @list: used internally 12001b2470e5SFlorian Westphal * @chains_ht: chains in the table 12011b2470e5SFlorian Westphal * @chains: same, for stable walks 120296518518SPatrick McHardy * @sets: sets in the table 1203e5009240SPablo Neira Ayuso * @objects: stateful objects in the table 12043b49e2e9SPablo Neira Ayuso * @flowtables: flow tables in the table 120596518518SPatrick McHardy * @hgenerator: handle generator state 12063ecbfd65SHarsha Sharma * @handle: table handle 120796518518SPatrick McHardy * @use: number of chain references to this table 120896518518SPatrick McHardy * @flags: table flag (see enum nft_table_flags) 1209f2a6d766SPablo Neira Ayuso * @genmask: generation mask 121036596dadSPablo Neira Ayuso * @afinfo: address family info 121196518518SPatrick McHardy * @name: name of the table 121200c320f9SFlorian Westphal * @validate_state: internal, set when transaction adds jumps 121396518518SPatrick McHardy */ 121496518518SPatrick McHardy struct nft_table { 121596518518SPatrick McHardy struct list_head list; 12161b2470e5SFlorian Westphal struct rhltable chains_ht; 121796518518SPatrick McHardy struct list_head chains; 121896518518SPatrick McHardy struct list_head sets; 1219e5009240SPablo Neira Ayuso struct list_head objects; 12203b49e2e9SPablo Neira Ayuso struct list_head flowtables; 122196518518SPatrick McHardy u64 hgenerator; 12223ecbfd65SHarsha Sharma u64 handle; 122396518518SPatrick McHardy u32 use; 122498319cb9SPablo Neira Ayuso u16 family:6, 122598319cb9SPablo Neira Ayuso flags:8, 1226f2a6d766SPablo Neira Ayuso genmask:2; 12276001a930SPablo Neira Ayuso u32 nlpid; 1228e46abbccSPhil Sutter char *name; 12297a81575bSJose M. Guisado Gomez u16 udlen; 12307a81575bSJose M. Guisado Gomez u8 *udata; 123100c320f9SFlorian Westphal u8 validate_state; 1232ebddf1a8SPablo Neira Ayuso }; 1233ebddf1a8SPablo Neira Ayuso 12346001a930SPablo Neira Ayuso static inline bool nft_table_has_owner(const struct nft_table *table) 12356001a930SPablo Neira Ayuso { 12366001a930SPablo Neira Ayuso return table->flags & NFT_TABLE_F_OWNER; 12376001a930SPablo Neira Ayuso } 12386001a930SPablo Neira Ayuso 1239d3519cb8SPablo Neira Ayuso static inline bool nft_base_chain_netdev(int family, u32 hooknum) 1240d3519cb8SPablo Neira Ayuso { 1241d3519cb8SPablo Neira Ayuso return family == NFPROTO_NETDEV || 1242d3519cb8SPablo Neira Ayuso (family == NFPROTO_INET && hooknum == NF_INET_INGRESS); 1243d3519cb8SPablo Neira Ayuso } 1244d3519cb8SPablo Neira Ayuso 1245cc07eeb0SPablo Neira Ayuso void nft_register_chain_type(const struct nft_chain_type *); 124632537e91SPablo Neira Ayuso void nft_unregister_chain_type(const struct nft_chain_type *); 124796518518SPatrick McHardy 12485eccdfaaSJoe Perches int nft_register_expr(struct nft_expr_type *); 12495eccdfaaSJoe Perches void nft_unregister_expr(struct nft_expr_type *); 125096518518SPatrick McHardy 125133d5a7b1SFlorian Westphal int nft_verdict_dump(struct sk_buff *skb, int type, 125233d5a7b1SFlorian Westphal const struct nft_verdict *v); 125333d5a7b1SFlorian Westphal 125433d5a7b1SFlorian Westphal /** 1255d152159bSFlorian Westphal * struct nft_object_hash_key - key to lookup nft_object 1256d152159bSFlorian Westphal * 1257d152159bSFlorian Westphal * @name: name of the stateful object to look up 1258d152159bSFlorian Westphal * @table: table the object belongs to 1259d152159bSFlorian Westphal */ 1260d152159bSFlorian Westphal struct nft_object_hash_key { 1261d152159bSFlorian Westphal const char *name; 1262d152159bSFlorian Westphal const struct nft_table *table; 1263d152159bSFlorian Westphal }; 1264d152159bSFlorian Westphal 1265d152159bSFlorian Westphal /** 1266e5009240SPablo Neira Ayuso * struct nft_object - nf_tables stateful object 1267e5009240SPablo Neira Ayuso * 1268e5009240SPablo Neira Ayuso * @list: table stateful object list node 1269d152159bSFlorian Westphal * @key: keys that identify this object 12704d44175aSFlorian Westphal * @rhlhead: nft_objname_ht node 1271e5009240SPablo Neira Ayuso * @genmask: generation mask 1272e5009240SPablo Neira Ayuso * @use: number of references to this stateful object 12733ecbfd65SHarsha Sharma * @handle: unique object handle 1274dfc46034SPablo M. Bermudo Garay * @ops: object operations 12753ecbfd65SHarsha Sharma * @data: object data, layout depends on type 1276e5009240SPablo Neira Ayuso */ 1277e5009240SPablo Neira Ayuso struct nft_object { 1278e5009240SPablo Neira Ayuso struct list_head list; 12794d44175aSFlorian Westphal struct rhlist_head rhlhead; 1280d152159bSFlorian Westphal struct nft_object_hash_key key; 1281e5009240SPablo Neira Ayuso u32 genmask:2, 1282e5009240SPablo Neira Ayuso use:30; 12833ecbfd65SHarsha Sharma u64 handle; 1284b131c964SJose M. Guisado Gomez u16 udlen; 1285b131c964SJose M. Guisado Gomez u8 *udata; 1286e5009240SPablo Neira Ayuso /* runtime data below here */ 1287dfc46034SPablo M. Bermudo Garay const struct nft_object_ops *ops ____cacheline_aligned; 1288e5009240SPablo Neira Ayuso unsigned char data[] 1289e5009240SPablo Neira Ayuso __attribute__((aligned(__alignof__(u64)))); 1290e5009240SPablo Neira Ayuso }; 1291e5009240SPablo Neira Ayuso 1292e5009240SPablo Neira Ayuso static inline void *nft_obj_data(const struct nft_object *obj) 1293e5009240SPablo Neira Ayuso { 1294e5009240SPablo Neira Ayuso return (void *)obj->data; 1295e5009240SPablo Neira Ayuso } 1296e5009240SPablo Neira Ayuso 1297e5009240SPablo Neira Ayuso #define nft_expr_obj(expr) *((struct nft_object **)nft_expr_priv(expr)) 1298e5009240SPablo Neira Ayuso 12994d44175aSFlorian Westphal struct nft_object *nft_obj_lookup(const struct net *net, 13004d44175aSFlorian Westphal const struct nft_table *table, 1301e5009240SPablo Neira Ayuso const struct nlattr *nla, u32 objtype, 1302e5009240SPablo Neira Ayuso u8 genmask); 1303e5009240SPablo Neira Ayuso 1304d152159bSFlorian Westphal void nft_obj_notify(struct net *net, const struct nft_table *table, 13052599e989SPablo Neira Ayuso struct nft_object *obj, u32 portid, u32 seq, 13066fb721cfSPablo Neira Ayuso int event, u16 flags, int family, int report, gfp_t gfp); 13072599e989SPablo Neira Ayuso 1308e5009240SPablo Neira Ayuso /** 1309e5009240SPablo Neira Ayuso * struct nft_object_type - stateful object type 1310e5009240SPablo Neira Ayuso * 1311dfc46034SPablo M. Bermudo Garay * @select_ops: function to select nft_object_ops 1312dfc46034SPablo M. Bermudo Garay * @ops: default ops, used when no select_ops functions is present 1313e5009240SPablo Neira Ayuso * @list: list node in list of object types 1314e5009240SPablo Neira Ayuso * @type: stateful object numeric type 1315e5009240SPablo Neira Ayuso * @owner: module owner 1316e5009240SPablo Neira Ayuso * @maxattr: maximum netlink attribute 1317e5009240SPablo Neira Ayuso * @policy: netlink attribute policy 1318dfc46034SPablo M. Bermudo Garay */ 1319dfc46034SPablo M. Bermudo Garay struct nft_object_type { 1320dfc46034SPablo M. Bermudo Garay const struct nft_object_ops *(*select_ops)(const struct nft_ctx *, 1321dfc46034SPablo M. Bermudo Garay const struct nlattr * const tb[]); 1322dfc46034SPablo M. Bermudo Garay const struct nft_object_ops *ops; 1323dfc46034SPablo M. Bermudo Garay struct list_head list; 1324dfc46034SPablo M. Bermudo Garay u32 type; 1325dfc46034SPablo M. Bermudo Garay unsigned int maxattr; 1326dfc46034SPablo M. Bermudo Garay struct module *owner; 1327dfc46034SPablo M. Bermudo Garay const struct nla_policy *policy; 1328dfc46034SPablo M. Bermudo Garay }; 1329dfc46034SPablo M. Bermudo Garay 1330dfc46034SPablo M. Bermudo Garay /** 1331dfc46034SPablo M. Bermudo Garay * struct nft_object_ops - stateful object operations 1332dfc46034SPablo M. Bermudo Garay * 1333dfc46034SPablo M. Bermudo Garay * @eval: stateful object evaluation function 1334dfc46034SPablo M. Bermudo Garay * @size: stateful object size 1335e5009240SPablo Neira Ayuso * @init: initialize object from netlink attributes 1336e5009240SPablo Neira Ayuso * @destroy: release existing stateful object 1337e5009240SPablo Neira Ayuso * @dump: netlink dump stateful object 1338d62d0ba9SFernando Fernandez Mancera * @update: update stateful object 1339e5009240SPablo Neira Ayuso */ 1340dfc46034SPablo M. Bermudo Garay struct nft_object_ops { 1341e5009240SPablo Neira Ayuso void (*eval)(struct nft_object *obj, 1342e5009240SPablo Neira Ayuso struct nft_regs *regs, 1343e5009240SPablo Neira Ayuso const struct nft_pktinfo *pkt); 1344e5009240SPablo Neira Ayuso unsigned int size; 134584fba055SFlorian Westphal int (*init)(const struct nft_ctx *ctx, 134684fba055SFlorian Westphal const struct nlattr *const tb[], 1347e5009240SPablo Neira Ayuso struct nft_object *obj); 134800bfb320SPablo Neira Ayuso void (*destroy)(const struct nft_ctx *ctx, 134900bfb320SPablo Neira Ayuso struct nft_object *obj); 1350e5009240SPablo Neira Ayuso int (*dump)(struct sk_buff *skb, 135143da04a5SPablo Neira Ayuso struct nft_object *obj, 135243da04a5SPablo Neira Ayuso bool reset); 1353d62d0ba9SFernando Fernandez Mancera void (*update)(struct nft_object *obj, 1354d62d0ba9SFernando Fernandez Mancera struct nft_object *newobj); 1355dfc46034SPablo M. Bermudo Garay const struct nft_object_type *type; 1356e5009240SPablo Neira Ayuso }; 1357e5009240SPablo Neira Ayuso 1358e5009240SPablo Neira Ayuso int nft_register_obj(struct nft_object_type *obj_type); 1359e5009240SPablo Neira Ayuso void nft_unregister_obj(struct nft_object_type *obj_type); 1360e5009240SPablo Neira Ayuso 1361cb662ac6SPablo Neira Ayuso #define NFT_NETDEVICE_MAX 256 1362d92191aaSPablo Neira Ayuso 1363e5009240SPablo Neira Ayuso /** 13643b49e2e9SPablo Neira Ayuso * struct nft_flowtable - nf_tables flow table 13653b49e2e9SPablo Neira Ayuso * 13663b49e2e9SPablo Neira Ayuso * @list: flow table list node in table list 13673b49e2e9SPablo Neira Ayuso * @table: the table the flow table is contained in 13683b49e2e9SPablo Neira Ayuso * @name: name of this flow table 13693b49e2e9SPablo Neira Ayuso * @hooknum: hook number 13703b49e2e9SPablo Neira Ayuso * @ops_len: number of hooks in array 13713b49e2e9SPablo Neira Ayuso * @genmask: generation mask 13723b49e2e9SPablo Neira Ayuso * @use: number of references to this flow table 13733ecbfd65SHarsha Sharma * @handle: unique object handle 1374d92191aaSPablo Neira Ayuso * @dev_name: array of device names 13753b49e2e9SPablo Neira Ayuso * @data: rhashtable and garbage collector 13763b49e2e9SPablo Neira Ayuso * @ops: array of hooks 13773b49e2e9SPablo Neira Ayuso */ 13783b49e2e9SPablo Neira Ayuso struct nft_flowtable { 13793b49e2e9SPablo Neira Ayuso struct list_head list; 13803b49e2e9SPablo Neira Ayuso struct nft_table *table; 13813b49e2e9SPablo Neira Ayuso char *name; 13823b49e2e9SPablo Neira Ayuso int hooknum; 13833b49e2e9SPablo Neira Ayuso int ops_len; 13843b49e2e9SPablo Neira Ayuso u32 genmask:2, 13853b49e2e9SPablo Neira Ayuso use:30; 13863ecbfd65SHarsha Sharma u64 handle; 13873b49e2e9SPablo Neira Ayuso /* runtime data below here */ 13883f0465a9SPablo Neira Ayuso struct list_head hook_list ____cacheline_aligned; 13893b49e2e9SPablo Neira Ayuso struct nf_flowtable data; 13903b49e2e9SPablo Neira Ayuso }; 13913b49e2e9SPablo Neira Ayuso 1392cac20fcdSPablo Neira Ayuso struct nft_flowtable *nft_flowtable_lookup(const struct nft_table *table, 13933b49e2e9SPablo Neira Ayuso const struct nlattr *nla, 13943b49e2e9SPablo Neira Ayuso u8 genmask); 13953b49e2e9SPablo Neira Ayuso 13969b05b6e1SLaura Garcia Liebana void nf_tables_deactivate_flowtable(const struct nft_ctx *ctx, 13979b05b6e1SLaura Garcia Liebana struct nft_flowtable *flowtable, 13989b05b6e1SLaura Garcia Liebana enum nft_trans_phase phase); 13999b05b6e1SLaura Garcia Liebana 14003b49e2e9SPablo Neira Ayuso void nft_register_flowtable_type(struct nf_flowtable_type *type); 14013b49e2e9SPablo Neira Ayuso void nft_unregister_flowtable_type(struct nf_flowtable_type *type); 14023b49e2e9SPablo Neira Ayuso 14033b49e2e9SPablo Neira Ayuso /** 140433d5a7b1SFlorian Westphal * struct nft_traceinfo - nft tracing information and state 140533d5a7b1SFlorian Westphal * 1406e34b9ed9SFlorian Westphal * @trace: other struct members are initialised 1407e34b9ed9SFlorian Westphal * @nf_trace: copy of skb->nf_trace before rule evaluation 1408e34b9ed9SFlorian Westphal * @type: event type (enum nft_trace_types) 1409e34b9ed9SFlorian Westphal * @skbid: hash of skb to be used as trace id 1410e34b9ed9SFlorian Westphal * @packet_dumped: packet headers sent in a previous traceinfo message 141133d5a7b1SFlorian Westphal * @basechain: base chain currently processed 141233d5a7b1SFlorian Westphal * @rule: rule that was evaluated 141333d5a7b1SFlorian Westphal */ 141433d5a7b1SFlorian Westphal struct nft_traceinfo { 1415e34b9ed9SFlorian Westphal bool trace; 1416e34b9ed9SFlorian Westphal bool nf_trace; 1417e34b9ed9SFlorian Westphal bool packet_dumped; 1418e34b9ed9SFlorian Westphal enum nft_trace_types type:8; 1419e34b9ed9SFlorian Westphal u32 skbid; 142033d5a7b1SFlorian Westphal const struct nft_base_chain *basechain; 14212c865a8aSPablo Neira Ayuso const struct nft_rule_dp *rule; 142233d5a7b1SFlorian Westphal }; 142333d5a7b1SFlorian Westphal 142433d5a7b1SFlorian Westphal void nft_trace_init(struct nft_traceinfo *info, const struct nft_pktinfo *pkt, 142533d5a7b1SFlorian Westphal const struct nft_chain *basechain); 142633d5a7b1SFlorian Westphal 1427698bb828SFlorian Westphal void nft_trace_notify(const struct nft_pktinfo *pkt, 1428*0a202145SFlorian Westphal const struct nft_verdict *verdict, 1429698bb828SFlorian Westphal struct nft_traceinfo *info); 143033d5a7b1SFlorian Westphal 14319370761cSPablo Neira Ayuso #define MODULE_ALIAS_NFT_CHAIN(family, name) \ 14329370761cSPablo Neira Ayuso MODULE_ALIAS("nft-chain-" __stringify(family) "-" name) 143396518518SPatrick McHardy 143464d46806SPatrick McHardy #define MODULE_ALIAS_NFT_AF_EXPR(family, name) \ 143564d46806SPatrick McHardy MODULE_ALIAS("nft-expr-" __stringify(family) "-" name) 143664d46806SPatrick McHardy 143796518518SPatrick McHardy #define MODULE_ALIAS_NFT_EXPR(name) \ 143896518518SPatrick McHardy MODULE_ALIAS("nft-expr-" name) 143996518518SPatrick McHardy 1440e5009240SPablo Neira Ayuso #define MODULE_ALIAS_NFT_OBJ(type) \ 1441e5009240SPablo Neira Ayuso MODULE_ALIAS("nft-obj-" __stringify(type)) 1442e5009240SPablo Neira Ayuso 144347e640afSJeremy Sowden #if IS_ENABLED(CONFIG_NF_TABLES) 144447e640afSJeremy Sowden 1445ea4bd995SPatrick McHardy /* 1446ea4bd995SPatrick McHardy * The gencursor defines two generations, the currently active and the 1447ea4bd995SPatrick McHardy * next one. Objects contain a bitmask of 2 bits specifying the generations 1448ea4bd995SPatrick McHardy * they're active in. A set bit means they're inactive in the generation 1449ea4bd995SPatrick McHardy * represented by that bit. 1450ea4bd995SPatrick McHardy * 1451ea4bd995SPatrick McHardy * New objects start out as inactive in the current and active in the 1452ea4bd995SPatrick McHardy * next generation. When committing the ruleset the bitmask is cleared, 1453ea4bd995SPatrick McHardy * meaning they're active in all generations. When removing an object, 1454ea4bd995SPatrick McHardy * it is set inactive in the next generation. After committing the ruleset, 1455ea4bd995SPatrick McHardy * the objects are removed. 1456ea4bd995SPatrick McHardy */ 1457ea4bd995SPatrick McHardy static inline unsigned int nft_gencursor_next(const struct net *net) 1458ea4bd995SPatrick McHardy { 1459ea4bd995SPatrick McHardy return net->nft.gencursor + 1 == 1 ? 1 : 0; 1460ea4bd995SPatrick McHardy } 1461ea4bd995SPatrick McHardy 1462ea4bd995SPatrick McHardy static inline u8 nft_genmask_next(const struct net *net) 1463ea4bd995SPatrick McHardy { 1464ea4bd995SPatrick McHardy return 1 << nft_gencursor_next(net); 1465ea4bd995SPatrick McHardy } 1466ea4bd995SPatrick McHardy 1467ea4bd995SPatrick McHardy static inline u8 nft_genmask_cur(const struct net *net) 1468ea4bd995SPatrick McHardy { 146914cd5d4aSMark Rutland /* Use READ_ONCE() to prevent refetching the value for atomicity */ 147014cd5d4aSMark Rutland return 1 << READ_ONCE(net->nft.gencursor); 1471ea4bd995SPatrick McHardy } 1472ea4bd995SPatrick McHardy 147322fe54d5SPatrick McHardy #define NFT_GENMASK_ANY ((1 << 0) | (1 << 1)) 147422fe54d5SPatrick McHardy 1475cc02e457SPatrick McHardy /* 1476889f7ee7SPablo Neira Ayuso * Generic transaction helpers 1477889f7ee7SPablo Neira Ayuso */ 1478889f7ee7SPablo Neira Ayuso 1479889f7ee7SPablo Neira Ayuso /* Check if this object is currently active. */ 1480889f7ee7SPablo Neira Ayuso #define nft_is_active(__net, __obj) \ 1481889f7ee7SPablo Neira Ayuso (((__obj)->genmask & nft_genmask_cur(__net)) == 0) 1482889f7ee7SPablo Neira Ayuso 1483889f7ee7SPablo Neira Ayuso /* Check if this object is active in the next generation. */ 1484889f7ee7SPablo Neira Ayuso #define nft_is_active_next(__net, __obj) \ 1485889f7ee7SPablo Neira Ayuso (((__obj)->genmask & nft_genmask_next(__net)) == 0) 1486889f7ee7SPablo Neira Ayuso 1487889f7ee7SPablo Neira Ayuso /* This object becomes active in the next generation. */ 1488889f7ee7SPablo Neira Ayuso #define nft_activate_next(__net, __obj) \ 1489889f7ee7SPablo Neira Ayuso (__obj)->genmask = nft_genmask_cur(__net) 1490889f7ee7SPablo Neira Ayuso 1491889f7ee7SPablo Neira Ayuso /* This object becomes inactive in the next generation. */ 1492889f7ee7SPablo Neira Ayuso #define nft_deactivate_next(__net, __obj) \ 1493889f7ee7SPablo Neira Ayuso (__obj)->genmask = nft_genmask_next(__net) 1494889f7ee7SPablo Neira Ayuso 1495889f7ee7SPablo Neira Ayuso /* After committing the ruleset, clear the stale generation bit. */ 1496889f7ee7SPablo Neira Ayuso #define nft_clear(__net, __obj) \ 1497889f7ee7SPablo Neira Ayuso (__obj)->genmask &= ~nft_genmask_next(__net) 1498f2a6d766SPablo Neira Ayuso #define nft_active_genmask(__obj, __genmask) \ 1499f2a6d766SPablo Neira Ayuso !((__obj)->genmask & __genmask) 1500889f7ee7SPablo Neira Ayuso 1501889f7ee7SPablo Neira Ayuso /* 1502cc02e457SPatrick McHardy * Set element transaction helpers 1503cc02e457SPatrick McHardy */ 1504cc02e457SPatrick McHardy 1505cc02e457SPatrick McHardy static inline bool nft_set_elem_active(const struct nft_set_ext *ext, 1506cc02e457SPatrick McHardy u8 genmask) 1507cc02e457SPatrick McHardy { 1508cc02e457SPatrick McHardy return !(ext->genmask & genmask); 1509cc02e457SPatrick McHardy } 1510cc02e457SPatrick McHardy 151142a55769SPablo Neira Ayuso static inline void nft_set_elem_change_active(const struct net *net, 151242a55769SPablo Neira Ayuso const struct nft_set *set, 1513cc02e457SPatrick McHardy struct nft_set_ext *ext) 1514cc02e457SPatrick McHardy { 151542a55769SPablo Neira Ayuso ext->genmask ^= nft_genmask_next(net); 1516cc02e457SPatrick McHardy } 1517cc02e457SPatrick McHardy 151847e640afSJeremy Sowden #endif /* IS_ENABLED(CONFIG_NF_TABLES) */ 151947e640afSJeremy Sowden 152069086658SPatrick McHardy /* 152169086658SPatrick McHardy * We use a free bit in the genmask field to indicate the element 152269086658SPatrick McHardy * is busy, meaning it is currently being processed either by 152369086658SPatrick McHardy * the netlink API or GC. 152469086658SPatrick McHardy * 152569086658SPatrick McHardy * Even though the genmask is only a single byte wide, this works 152669086658SPatrick McHardy * because the extension structure if fully constant once initialized, 152769086658SPatrick McHardy * so there are no non-atomic write accesses unless it is already 152869086658SPatrick McHardy * marked busy. 152969086658SPatrick McHardy */ 153069086658SPatrick McHardy #define NFT_SET_ELEM_BUSY_MASK (1 << 2) 153169086658SPatrick McHardy 153269086658SPatrick McHardy #if defined(__LITTLE_ENDIAN_BITFIELD) 153369086658SPatrick McHardy #define NFT_SET_ELEM_BUSY_BIT 2 153469086658SPatrick McHardy #elif defined(__BIG_ENDIAN_BITFIELD) 153569086658SPatrick McHardy #define NFT_SET_ELEM_BUSY_BIT (BITS_PER_LONG - BITS_PER_BYTE + 2) 153669086658SPatrick McHardy #else 153769086658SPatrick McHardy #error 153869086658SPatrick McHardy #endif 153969086658SPatrick McHardy 154069086658SPatrick McHardy static inline int nft_set_elem_mark_busy(struct nft_set_ext *ext) 154169086658SPatrick McHardy { 154269086658SPatrick McHardy unsigned long *word = (unsigned long *)ext; 154369086658SPatrick McHardy 154469086658SPatrick McHardy BUILD_BUG_ON(offsetof(struct nft_set_ext, genmask) != 0); 154569086658SPatrick McHardy return test_and_set_bit(NFT_SET_ELEM_BUSY_BIT, word); 154669086658SPatrick McHardy } 154769086658SPatrick McHardy 154869086658SPatrick McHardy static inline void nft_set_elem_clear_busy(struct nft_set_ext *ext) 154969086658SPatrick McHardy { 155069086658SPatrick McHardy unsigned long *word = (unsigned long *)ext; 155169086658SPatrick McHardy 155269086658SPatrick McHardy clear_bit(NFT_SET_ELEM_BUSY_BIT, word); 155369086658SPatrick McHardy } 155469086658SPatrick McHardy 15551a1e1a12SPatrick McHardy /** 15561a1e1a12SPatrick McHardy * struct nft_trans - nf_tables object update in transaction 15571a1e1a12SPatrick McHardy * 15581a1e1a12SPatrick McHardy * @list: used internally 15591a1e1a12SPatrick McHardy * @msg_type: message type 15600935d558SFlorian Westphal * @put_net: ctx->net needs to be put 15611a1e1a12SPatrick McHardy * @ctx: transaction context 15621a1e1a12SPatrick McHardy * @data: internal information related to the transaction 15631a1e1a12SPatrick McHardy */ 15641a1e1a12SPatrick McHardy struct nft_trans { 15651a1e1a12SPatrick McHardy struct list_head list; 15661a1e1a12SPatrick McHardy int msg_type; 15670935d558SFlorian Westphal bool put_net; 15681a1e1a12SPatrick McHardy struct nft_ctx ctx; 15696daf1414SGustavo A. R. Silva char data[]; 15701a1e1a12SPatrick McHardy }; 15711a1e1a12SPatrick McHardy 15721a1e1a12SPatrick McHardy struct nft_trans_rule { 15731a1e1a12SPatrick McHardy struct nft_rule *rule; 1574c9626a2cSPablo Neira Ayuso struct nft_flow_rule *flow; 15751a94e38dSPablo Neira Ayuso u32 rule_id; 15761a1e1a12SPatrick McHardy }; 15771a1e1a12SPatrick McHardy 15781a1e1a12SPatrick McHardy #define nft_trans_rule(trans) \ 15791a1e1a12SPatrick McHardy (((struct nft_trans_rule *)trans->data)->rule) 1580c9626a2cSPablo Neira Ayuso #define nft_trans_flow_rule(trans) \ 1581c9626a2cSPablo Neira Ayuso (((struct nft_trans_rule *)trans->data)->flow) 15821a94e38dSPablo Neira Ayuso #define nft_trans_rule_id(trans) \ 15831a94e38dSPablo Neira Ayuso (((struct nft_trans_rule *)trans->data)->rule_id) 15841a1e1a12SPatrick McHardy 15851a1e1a12SPatrick McHardy struct nft_trans_set { 15861a1e1a12SPatrick McHardy struct nft_set *set; 15871a1e1a12SPatrick McHardy u32 set_id; 1588123b9961SPablo Neira Ayuso u32 gc_int; 1589123b9961SPablo Neira Ayuso u64 timeout; 1590123b9961SPablo Neira Ayuso bool update; 15916a0a8d10SPablo Neira Ayuso bool bound; 15921a1e1a12SPatrick McHardy }; 15931a1e1a12SPatrick McHardy 15941a1e1a12SPatrick McHardy #define nft_trans_set(trans) \ 15951a1e1a12SPatrick McHardy (((struct nft_trans_set *)trans->data)->set) 15961a1e1a12SPatrick McHardy #define nft_trans_set_id(trans) \ 15971a1e1a12SPatrick McHardy (((struct nft_trans_set *)trans->data)->set_id) 15986a0a8d10SPablo Neira Ayuso #define nft_trans_set_bound(trans) \ 15996a0a8d10SPablo Neira Ayuso (((struct nft_trans_set *)trans->data)->bound) 1600123b9961SPablo Neira Ayuso #define nft_trans_set_update(trans) \ 1601123b9961SPablo Neira Ayuso (((struct nft_trans_set *)trans->data)->update) 1602123b9961SPablo Neira Ayuso #define nft_trans_set_timeout(trans) \ 1603123b9961SPablo Neira Ayuso (((struct nft_trans_set *)trans->data)->timeout) 1604123b9961SPablo Neira Ayuso #define nft_trans_set_gc_int(trans) \ 1605123b9961SPablo Neira Ayuso (((struct nft_trans_set *)trans->data)->gc_int) 16061a1e1a12SPatrick McHardy 16071a1e1a12SPatrick McHardy struct nft_trans_chain { 16081a1e1a12SPatrick McHardy bool update; 1609b7263e07SPhil Sutter char *name; 16101a1e1a12SPatrick McHardy struct nft_stats __percpu *stats; 16111a1e1a12SPatrick McHardy u8 policy; 161274cccc3dSPablo Neira Ayuso u32 chain_id; 16131a1e1a12SPatrick McHardy }; 16141a1e1a12SPatrick McHardy 16151a1e1a12SPatrick McHardy #define nft_trans_chain_update(trans) \ 16161a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->update) 16171a1e1a12SPatrick McHardy #define nft_trans_chain_name(trans) \ 16181a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->name) 16191a1e1a12SPatrick McHardy #define nft_trans_chain_stats(trans) \ 16201a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->stats) 16211a1e1a12SPatrick McHardy #define nft_trans_chain_policy(trans) \ 16221a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->policy) 162374cccc3dSPablo Neira Ayuso #define nft_trans_chain_id(trans) \ 162474cccc3dSPablo Neira Ayuso (((struct nft_trans_chain *)trans->data)->chain_id) 16251a1e1a12SPatrick McHardy 16261a1e1a12SPatrick McHardy struct nft_trans_table { 16271a1e1a12SPatrick McHardy bool update; 16281a1e1a12SPatrick McHardy }; 16291a1e1a12SPatrick McHardy 16301a1e1a12SPatrick McHardy #define nft_trans_table_update(trans) \ 16311a1e1a12SPatrick McHardy (((struct nft_trans_table *)trans->data)->update) 16321a1e1a12SPatrick McHardy 16331a1e1a12SPatrick McHardy struct nft_trans_elem { 16341a1e1a12SPatrick McHardy struct nft_set *set; 16351a1e1a12SPatrick McHardy struct nft_set_elem elem; 16366a0a8d10SPablo Neira Ayuso bool bound; 16371a1e1a12SPatrick McHardy }; 16381a1e1a12SPatrick McHardy 16391a1e1a12SPatrick McHardy #define nft_trans_elem_set(trans) \ 16401a1e1a12SPatrick McHardy (((struct nft_trans_elem *)trans->data)->set) 16411a1e1a12SPatrick McHardy #define nft_trans_elem(trans) \ 16421a1e1a12SPatrick McHardy (((struct nft_trans_elem *)trans->data)->elem) 16436a0a8d10SPablo Neira Ayuso #define nft_trans_elem_set_bound(trans) \ 16446a0a8d10SPablo Neira Ayuso (((struct nft_trans_elem *)trans->data)->bound) 16451a1e1a12SPatrick McHardy 1646e5009240SPablo Neira Ayuso struct nft_trans_obj { 1647e5009240SPablo Neira Ayuso struct nft_object *obj; 1648d62d0ba9SFernando Fernandez Mancera struct nft_object *newobj; 1649d62d0ba9SFernando Fernandez Mancera bool update; 1650e5009240SPablo Neira Ayuso }; 1651e5009240SPablo Neira Ayuso 1652e5009240SPablo Neira Ayuso #define nft_trans_obj(trans) \ 1653e5009240SPablo Neira Ayuso (((struct nft_trans_obj *)trans->data)->obj) 1654d62d0ba9SFernando Fernandez Mancera #define nft_trans_obj_newobj(trans) \ 1655d62d0ba9SFernando Fernandez Mancera (((struct nft_trans_obj *)trans->data)->newobj) 1656d62d0ba9SFernando Fernandez Mancera #define nft_trans_obj_update(trans) \ 1657d62d0ba9SFernando Fernandez Mancera (((struct nft_trans_obj *)trans->data)->update) 1658e5009240SPablo Neira Ayuso 16593b49e2e9SPablo Neira Ayuso struct nft_trans_flowtable { 16603b49e2e9SPablo Neira Ayuso struct nft_flowtable *flowtable; 166178d9f48fSPablo Neira Ayuso bool update; 166278d9f48fSPablo Neira Ayuso struct list_head hook_list; 16637b35582cSPablo Neira Ayuso u32 flags; 16643b49e2e9SPablo Neira Ayuso }; 16653b49e2e9SPablo Neira Ayuso 16663b49e2e9SPablo Neira Ayuso #define nft_trans_flowtable(trans) \ 16673b49e2e9SPablo Neira Ayuso (((struct nft_trans_flowtable *)trans->data)->flowtable) 166878d9f48fSPablo Neira Ayuso #define nft_trans_flowtable_update(trans) \ 166978d9f48fSPablo Neira Ayuso (((struct nft_trans_flowtable *)trans->data)->update) 167078d9f48fSPablo Neira Ayuso #define nft_trans_flowtable_hooks(trans) \ 167178d9f48fSPablo Neira Ayuso (((struct nft_trans_flowtable *)trans->data)->hook_list) 16727b35582cSPablo Neira Ayuso #define nft_trans_flowtable_flags(trans) \ 16737b35582cSPablo Neira Ayuso (((struct nft_trans_flowtable *)trans->data)->flags) 16743b49e2e9SPablo Neira Ayuso 167502c7b25eSPablo Neira Ayuso int __init nft_chain_filter_init(void); 1676d209df3eSFlorian Westphal void nft_chain_filter_fini(void); 167702c7b25eSPablo Neira Ayuso 1678c1deb065SFlorian Westphal void __init nft_chain_route_init(void); 1679c1deb065SFlorian Westphal void nft_chain_route_fini(void); 1680ffe8923fSFlorian Westphal 1681ffe8923fSFlorian Westphal void nf_tables_trans_destroy_flush_work(void); 1682917d80d3SPablo Neira Ayuso 1683917d80d3SPablo Neira Ayuso int nf_msecs_to_jiffies64(const struct nlattr *nla, u64 *result); 1684917d80d3SPablo Neira Ayuso __be64 nf_jiffies64_to_msecs(u64 input); 1685917d80d3SPablo Neira Ayuso 1686cefa31a9SFlorian Westphal #ifdef CONFIG_MODULES 1687cefa31a9SFlorian Westphal __printf(2, 3) int nft_request_module(struct net *net, const char *fmt, ...); 1688cefa31a9SFlorian Westphal #else 1689cefa31a9SFlorian Westphal static inline int nft_request_module(struct net *net, const char *fmt, ...) { return -ENOENT; } 1690cefa31a9SFlorian Westphal #endif 16910854db2aSFlorian Westphal 16920854db2aSFlorian Westphal struct nftables_pernet { 16930854db2aSFlorian Westphal struct list_head tables; 16940854db2aSFlorian Westphal struct list_head commit_list; 16950854db2aSFlorian Westphal struct list_head module_list; 16960854db2aSFlorian Westphal struct list_head notify_list; 16970854db2aSFlorian Westphal struct mutex commit_mutex; 1698ab482c6bSPablo Neira Ayuso u64 table_handle; 16990854db2aSFlorian Westphal unsigned int base_seq; 17000854db2aSFlorian Westphal }; 17010854db2aSFlorian Westphal 1702d59d2f82SPablo Neira Ayuso extern unsigned int nf_tables_net_id; 1703d59d2f82SPablo Neira Ayuso 1704d59d2f82SPablo Neira Ayuso static inline struct nftables_pernet *nft_pernet(const struct net *net) 1705d59d2f82SPablo Neira Ayuso { 1706d59d2f82SPablo Neira Ayuso return net_generic(net, nf_tables_net_id); 1707d59d2f82SPablo Neira Ayuso } 1708d59d2f82SPablo Neira Ayuso 1709b2d30654SPablo Neira Ayuso #define __NFT_REDUCE_READONLY 1UL 1710b2d30654SPablo Neira Ayuso #define NFT_REDUCE_READONLY (void *)__NFT_REDUCE_READONLY 1711b2d30654SPablo Neira Ayuso 1712b2d30654SPablo Neira Ayuso static inline bool nft_reduce_is_readonly(const struct nft_expr *expr) 1713b2d30654SPablo Neira Ayuso { 1714b2d30654SPablo Neira Ayuso return expr->ops->reduce == NFT_REDUCE_READONLY; 1715b2d30654SPablo Neira Ayuso } 1716b2d30654SPablo Neira Ayuso 171734cc9e52SPablo Neira Ayuso void nft_reg_track_update(struct nft_regs_track *track, 171834cc9e52SPablo Neira Ayuso const struct nft_expr *expr, u8 dreg, u8 len); 171934cc9e52SPablo Neira Ayuso void nft_reg_track_cancel(struct nft_regs_track *track, u8 dreg, u8 len); 172034cc9e52SPablo Neira Ayuso void __nft_reg_track_cancel(struct nft_regs_track *track, u8 dreg); 172134cc9e52SPablo Neira Ayuso 172234cc9e52SPablo Neira Ayuso static inline bool nft_reg_track_cmp(struct nft_regs_track *track, 172334cc9e52SPablo Neira Ayuso const struct nft_expr *expr, u8 dreg) 172434cc9e52SPablo Neira Ayuso { 172534cc9e52SPablo Neira Ayuso return track->regs[dreg].selector && 172634cc9e52SPablo Neira Ayuso track->regs[dreg].selector->ops == expr->ops && 172734cc9e52SPablo Neira Ayuso track->regs[dreg].num_reg == 0; 172834cc9e52SPablo Neira Ayuso } 172934cc9e52SPablo Neira Ayuso 173096518518SPatrick McHardy #endif /* _NET_NF_TABLES_H */ 1731