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), 27b5bdc6f9SPablo Neira Ayuso }; 28b5bdc6f9SPablo Neira Ayuso 2996518518SPatrick McHardy struct nft_pktinfo { 3096518518SPatrick McHardy struct sk_buff *skb; 31897389deSFlorian Westphal const struct nf_hook_state *state; 32b5bdc6f9SPablo Neira Ayuso u8 flags; 334566bf27SPatrick McHardy u8 tprot; 34897389deSFlorian Westphal u16 fragoff; 35897389deSFlorian Westphal unsigned int thoff; 36c46b38dcSPablo Neira Ayuso unsigned int inneroff; 3796518518SPatrick McHardy }; 3896518518SPatrick McHardy 3985554eb9SFlorian Westphal static inline struct sock *nft_sk(const struct nft_pktinfo *pkt) 4085554eb9SFlorian Westphal { 41897389deSFlorian Westphal return pkt->state->sk; 4285554eb9SFlorian Westphal } 4385554eb9SFlorian Westphal 442d7b4aceSFlorian Westphal static inline unsigned int nft_thoff(const struct nft_pktinfo *pkt) 452d7b4aceSFlorian Westphal { 46897389deSFlorian Westphal return pkt->thoff; 472d7b4aceSFlorian Westphal } 482d7b4aceSFlorian Westphal 490e5a1c7eSPablo Neira Ayuso static inline struct net *nft_net(const struct nft_pktinfo *pkt) 500e5a1c7eSPablo Neira Ayuso { 51897389deSFlorian Westphal return pkt->state->net; 520e5a1c7eSPablo Neira Ayuso } 530e5a1c7eSPablo Neira Ayuso 540e5a1c7eSPablo Neira Ayuso static inline unsigned int nft_hook(const struct nft_pktinfo *pkt) 550e5a1c7eSPablo Neira Ayuso { 56897389deSFlorian Westphal return pkt->state->hook; 570e5a1c7eSPablo Neira Ayuso } 580e5a1c7eSPablo Neira Ayuso 590e5a1c7eSPablo Neira Ayuso static inline u8 nft_pf(const struct nft_pktinfo *pkt) 600e5a1c7eSPablo Neira Ayuso { 61897389deSFlorian Westphal return pkt->state->pf; 620e5a1c7eSPablo Neira Ayuso } 630e5a1c7eSPablo Neira Ayuso 640e5a1c7eSPablo Neira Ayuso static inline const struct net_device *nft_in(const struct nft_pktinfo *pkt) 650e5a1c7eSPablo Neira Ayuso { 66897389deSFlorian Westphal return pkt->state->in; 670e5a1c7eSPablo Neira Ayuso } 680e5a1c7eSPablo Neira Ayuso 690e5a1c7eSPablo Neira Ayuso static inline const struct net_device *nft_out(const struct nft_pktinfo *pkt) 700e5a1c7eSPablo Neira Ayuso { 71897389deSFlorian Westphal return pkt->state->out; 720e5a1c7eSPablo Neira Ayuso } 730e5a1c7eSPablo Neira Ayuso 740ca743a5SPablo Neira Ayuso static inline void nft_set_pktinfo(struct nft_pktinfo *pkt, 750ca743a5SPablo Neira Ayuso struct sk_buff *skb, 76073bfd56SDavid S. Miller const struct nf_hook_state *state) 770ca743a5SPablo Neira Ayuso { 780ca743a5SPablo Neira Ayuso pkt->skb = skb; 79897389deSFlorian Westphal pkt->state = state; 800ca743a5SPablo Neira Ayuso } 810ca743a5SPablo Neira Ayuso 82f06ad944SFlorian Westphal static inline void nft_set_pktinfo_unspec(struct nft_pktinfo *pkt) 83beac5afaSPablo Neira Ayuso { 84b5bdc6f9SPablo Neira Ayuso pkt->flags = 0; 85beac5afaSPablo Neira Ayuso pkt->tprot = 0; 86897389deSFlorian Westphal pkt->thoff = 0; 87897389deSFlorian Westphal pkt->fragoff = 0; 88beac5afaSPablo Neira Ayuso } 89beac5afaSPablo Neira Ayuso 90a55e22e9SPatrick McHardy /** 91a55e22e9SPatrick McHardy * struct nft_verdict - nf_tables verdict 92a55e22e9SPatrick McHardy * 93a55e22e9SPatrick McHardy * @code: nf_tables/netfilter verdict code 94a55e22e9SPatrick McHardy * @chain: destination chain for NFT_JUMP/NFT_GOTO 95a55e22e9SPatrick McHardy */ 96a55e22e9SPatrick McHardy struct nft_verdict { 97a55e22e9SPatrick McHardy u32 code; 98a55e22e9SPatrick McHardy struct nft_chain *chain; 99a55e22e9SPatrick McHardy }; 100a55e22e9SPatrick McHardy 10196518518SPatrick McHardy struct nft_data { 10296518518SPatrick McHardy union { 10396518518SPatrick McHardy u32 data[4]; 1041ca2e170SPatrick McHardy struct nft_verdict verdict; 10596518518SPatrick McHardy }; 10696518518SPatrick McHardy } __attribute__((aligned(__alignof__(u64)))); 10796518518SPatrick McHardy 108642c8effSPablo Neira Ayuso #define NFT_REG32_NUM 20 109642c8effSPablo Neira Ayuso 110a55e22e9SPatrick McHardy /** 111a55e22e9SPatrick McHardy * struct nft_regs - nf_tables register set 112a55e22e9SPatrick McHardy * 113a55e22e9SPatrick McHardy * @data: data registers 114a55e22e9SPatrick McHardy * @verdict: verdict register 115a55e22e9SPatrick McHardy * 116a55e22e9SPatrick McHardy * The first four data registers alias to the verdict register. 117a55e22e9SPatrick McHardy */ 118a55e22e9SPatrick McHardy struct nft_regs { 119a55e22e9SPatrick McHardy union { 120642c8effSPablo Neira Ayuso u32 data[NFT_REG32_NUM]; 121a55e22e9SPatrick McHardy struct nft_verdict verdict; 122a55e22e9SPatrick McHardy }; 123a55e22e9SPatrick McHardy }; 124a55e22e9SPatrick McHardy 12512e4ecfaSPablo Neira Ayuso struct nft_regs_track { 12612e4ecfaSPablo Neira Ayuso struct { 12712e4ecfaSPablo Neira Ayuso const struct nft_expr *selector; 12812e4ecfaSPablo Neira Ayuso const struct nft_expr *bitwise; 12912e4ecfaSPablo Neira Ayuso } regs[NFT_REG32_NUM]; 13012e4ecfaSPablo Neira Ayuso 13112e4ecfaSPablo Neira Ayuso const struct nft_expr *cur; 13212e4ecfaSPablo Neira Ayuso const struct nft_expr *last; 13312e4ecfaSPablo Neira Ayuso }; 13412e4ecfaSPablo Neira Ayuso 135a1b840adSAnder Juaristi /* Store/load an u8, u16 or u64 integer to/from the u32 data register. 13610596608SLiping Zhang * 13710596608SLiping Zhang * Note, when using concatenations, register allocation happens at 32-bit 13810596608SLiping Zhang * level. So for store instruction, pad the rest part with zero to avoid 13910596608SLiping Zhang * garbage values. 14010596608SLiping Zhang */ 14110596608SLiping Zhang 14210596608SLiping Zhang static inline void nft_reg_store8(u32 *dreg, u8 val) 14310596608SLiping Zhang { 14410596608SLiping Zhang *dreg = 0; 14510596608SLiping Zhang *(u8 *)dreg = val; 14610596608SLiping Zhang } 14710596608SLiping Zhang 1487cd9a58dSPablo Neira Ayuso static inline u8 nft_reg_load8(const u32 *sreg) 149a1b840adSAnder Juaristi { 150a1b840adSAnder Juaristi return *(u8 *)sreg; 151a1b840adSAnder Juaristi } 152a1b840adSAnder Juaristi 153a1b840adSAnder Juaristi static inline void nft_reg_store16(u32 *dreg, u16 val) 154a1b840adSAnder Juaristi { 155a1b840adSAnder Juaristi *dreg = 0; 156a1b840adSAnder Juaristi *(u16 *)dreg = val; 157a1b840adSAnder Juaristi } 158a1b840adSAnder Juaristi 1597cd9a58dSPablo Neira Ayuso static inline u16 nft_reg_load16(const u32 *sreg) 16010596608SLiping Zhang { 16110596608SLiping Zhang return *(u16 *)sreg; 16210596608SLiping Zhang } 16310596608SLiping Zhang 164a1b840adSAnder Juaristi static inline void nft_reg_store64(u32 *dreg, u64 val) 16510596608SLiping Zhang { 166a1b840adSAnder Juaristi put_unaligned(val, (u64 *)dreg); 167a1b840adSAnder Juaristi } 168a1b840adSAnder Juaristi 1697cd9a58dSPablo Neira Ayuso static inline u64 nft_reg_load64(const u32 *sreg) 170a1b840adSAnder Juaristi { 171a1b840adSAnder Juaristi return get_unaligned((u64 *)sreg); 17210596608SLiping Zhang } 17310596608SLiping Zhang 17449499c3eSPatrick McHardy static inline void nft_data_copy(u32 *dst, const struct nft_data *src, 17549499c3eSPatrick McHardy unsigned int len) 17696518518SPatrick McHardy { 1771e105e6aSFlorian Westphal if (len % NFT_REG32_SIZE) 1781e105e6aSFlorian Westphal dst[len / NFT_REG32_SIZE] = 0; 17949499c3eSPatrick McHardy memcpy(dst, src, len); 18096518518SPatrick McHardy } 18196518518SPatrick McHardy 18296518518SPatrick McHardy /** 18320a69341SPatrick McHardy * struct nft_ctx - nf_tables rule/set context 18496518518SPatrick McHardy * 18599633ab2SPablo Neira Ayuso * @net: net namespace 18696518518SPatrick McHardy * @table: the table the chain is contained in 18796518518SPatrick McHardy * @chain: the chain the rule is contained in 1880ca743a5SPablo Neira Ayuso * @nla: netlink attributes 189128ad332SPablo Neira Ayuso * @portid: netlink portID of the original message 190128ad332SPablo Neira Ayuso * @seq: netlink sequence number 19136596dadSPablo Neira Ayuso * @family: protocol family 19226b2f552STaehee Yoo * @level: depth of the chains 193128ad332SPablo Neira Ayuso * @report: notify via unicast netlink message 19496518518SPatrick McHardy */ 19596518518SPatrick McHardy struct nft_ctx { 19699633ab2SPablo Neira Ayuso struct net *net; 1977c95f6d8SPablo Neira Ayuso struct nft_table *table; 1987c95f6d8SPablo Neira Ayuso struct nft_chain *chain; 1990ca743a5SPablo Neira Ayuso const struct nlattr * const *nla; 200128ad332SPablo Neira Ayuso u32 portid; 201128ad332SPablo Neira Ayuso u32 seq; 202c9626a2cSPablo Neira Ayuso u16 flags; 20336596dadSPablo Neira Ayuso u8 family; 20426b2f552STaehee Yoo u8 level; 205128ad332SPablo Neira Ayuso bool report; 20696518518SPatrick McHardy }; 20796518518SPatrick McHardy 20896518518SPatrick McHardy struct nft_data_desc { 20996518518SPatrick McHardy enum nft_data_types type; 21096518518SPatrick McHardy unsigned int len; 21196518518SPatrick McHardy }; 21296518518SPatrick McHardy 213d0a11fc3SPatrick McHardy int nft_data_init(const struct nft_ctx *ctx, 214d0a11fc3SPatrick McHardy struct nft_data *data, unsigned int size, 21596518518SPatrick McHardy struct nft_data_desc *desc, const struct nlattr *nla); 216bb7b40aeSPablo Neira Ayuso void nft_data_hold(const struct nft_data *data, enum nft_data_types type); 21759105446SPablo Neira Ayuso void nft_data_release(const struct nft_data *data, enum nft_data_types type); 2185eccdfaaSJoe Perches int nft_data_dump(struct sk_buff *skb, int attr, const struct nft_data *data, 21996518518SPatrick McHardy enum nft_data_types type, unsigned int len); 22096518518SPatrick McHardy 22196518518SPatrick McHardy static inline enum nft_data_types nft_dreg_to_type(enum nft_registers reg) 22296518518SPatrick McHardy { 22396518518SPatrick McHardy return reg == NFT_REG_VERDICT ? NFT_DATA_VERDICT : NFT_DATA_VALUE; 22496518518SPatrick McHardy } 22596518518SPatrick McHardy 22620a69341SPatrick McHardy static inline enum nft_registers nft_type_to_reg(enum nft_data_types type) 22720a69341SPatrick McHardy { 228bf798657SPablo Neira Ayuso return type == NFT_DATA_VERDICT ? NFT_REG_VERDICT : NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE; 22920a69341SPatrick McHardy } 23020a69341SPatrick McHardy 231f1d505bbSJohn W. Linville int nft_parse_u32_check(const struct nlattr *attr, int max, u32 *dest); 232b1c96ed3SPatrick McHardy int nft_dump_register(struct sk_buff *skb, unsigned int attr, unsigned int reg); 233b1c96ed3SPatrick McHardy 2344f16d25cSPablo Neira Ayuso int nft_parse_register_load(const struct nlattr *attr, u8 *sreg, u32 len); 235345023b0SPablo Neira Ayuso int nft_parse_register_store(const struct nft_ctx *ctx, 236345023b0SPablo Neira Ayuso const struct nlattr *attr, u8 *dreg, 23796518518SPatrick McHardy const struct nft_data *data, 23845d9bcdaSPatrick McHardy enum nft_data_types type, unsigned int len); 23996518518SPatrick McHardy 24086f1ec32SPatrick McHardy /** 24186f1ec32SPatrick McHardy * struct nft_userdata - user defined data associated with an object 24286f1ec32SPatrick McHardy * 24386f1ec32SPatrick McHardy * @len: length of the data 24486f1ec32SPatrick McHardy * @data: content 24586f1ec32SPatrick McHardy * 24686f1ec32SPatrick McHardy * The presence of user data is indicated in an object specific fashion, 24786f1ec32SPatrick McHardy * so a length of zero can't occur and the value "len" indicates data 24886f1ec32SPatrick McHardy * of length len + 1. 24986f1ec32SPatrick McHardy */ 25086f1ec32SPatrick McHardy struct nft_userdata { 25186f1ec32SPatrick McHardy u8 len; 2526daf1414SGustavo A. R. Silva unsigned char data[]; 25386f1ec32SPatrick McHardy }; 25486f1ec32SPatrick McHardy 25596518518SPatrick McHardy /** 25620a69341SPatrick McHardy * struct nft_set_elem - generic representation of set elements 25720a69341SPatrick McHardy * 25820a69341SPatrick McHardy * @key: element key 2597b225d0bSPablo Neira Ayuso * @key_end: closing element key 260fe2811ebSPatrick McHardy * @priv: element private data and extensions 26120a69341SPatrick McHardy */ 26220a69341SPatrick McHardy struct nft_set_elem { 2637d740264SPatrick McHardy union { 2647d740264SPatrick McHardy u32 buf[NFT_DATA_VALUE_MAXLEN / sizeof(u32)]; 2657d740264SPatrick McHardy struct nft_data val; 2667d740264SPatrick McHardy } key; 2677b225d0bSPablo Neira Ayuso union { 2687b225d0bSPablo Neira Ayuso u32 buf[NFT_DATA_VALUE_MAXLEN / sizeof(u32)]; 2697b225d0bSPablo Neira Ayuso struct nft_data val; 2707b225d0bSPablo Neira Ayuso } key_end; 271fdb9c405SPablo Neira Ayuso union { 272fdb9c405SPablo Neira Ayuso u32 buf[NFT_DATA_VALUE_MAXLEN / sizeof(u32)]; 273fdb9c405SPablo Neira Ayuso struct nft_data val; 274fdb9c405SPablo Neira Ayuso } data; 275fe2811ebSPatrick McHardy void *priv; 27620a69341SPatrick McHardy }; 27720a69341SPatrick McHardy 27820a69341SPatrick McHardy struct nft_set; 27920a69341SPatrick McHardy struct nft_set_iter { 2808588ac09SPablo Neira Ayuso u8 genmask; 28120a69341SPatrick McHardy unsigned int count; 28220a69341SPatrick McHardy unsigned int skip; 28320a69341SPatrick McHardy int err; 28420a69341SPatrick McHardy int (*fn)(const struct nft_ctx *ctx, 285de70185dSPablo Neira Ayuso struct nft_set *set, 28620a69341SPatrick McHardy const struct nft_set_iter *iter, 287de70185dSPablo Neira Ayuso struct nft_set_elem *elem); 28820a69341SPatrick McHardy }; 28920a69341SPatrick McHardy 29020a69341SPatrick McHardy /** 291c50b960cSPatrick McHardy * struct nft_set_desc - description of set elements 292c50b960cSPatrick McHardy * 293c50b960cSPatrick McHardy * @klen: key length 294c50b960cSPatrick McHardy * @dlen: data length 295c50b960cSPatrick McHardy * @size: number of set elements 296f3a2181eSStefano Brivio * @field_len: length of each field in concatenation, bytes 297f3a2181eSStefano Brivio * @field_count: number of concatenated fields in element 298d56aab26SPablo Neira Ayuso * @expr: set must support for expressions 299c50b960cSPatrick McHardy */ 300c50b960cSPatrick McHardy struct nft_set_desc { 301c50b960cSPatrick McHardy unsigned int klen; 302c50b960cSPatrick McHardy unsigned int dlen; 303c50b960cSPatrick McHardy unsigned int size; 304f3a2181eSStefano Brivio u8 field_len[NFT_REG32_COUNT]; 305f3a2181eSStefano Brivio u8 field_count; 306d56aab26SPablo Neira Ayuso bool expr; 307c50b960cSPatrick McHardy }; 308c50b960cSPatrick McHardy 309c50b960cSPatrick McHardy /** 310c50b960cSPatrick McHardy * enum nft_set_class - performance class 311c50b960cSPatrick McHardy * 312c50b960cSPatrick McHardy * @NFT_LOOKUP_O_1: constant, O(1) 313c50b960cSPatrick McHardy * @NFT_LOOKUP_O_LOG_N: logarithmic, O(log N) 314c50b960cSPatrick McHardy * @NFT_LOOKUP_O_N: linear, O(N) 315c50b960cSPatrick McHardy */ 316c50b960cSPatrick McHardy enum nft_set_class { 317c50b960cSPatrick McHardy NFT_SET_CLASS_O_1, 318c50b960cSPatrick McHardy NFT_SET_CLASS_O_LOG_N, 319c50b960cSPatrick McHardy NFT_SET_CLASS_O_N, 320c50b960cSPatrick McHardy }; 321c50b960cSPatrick McHardy 322c50b960cSPatrick McHardy /** 323c50b960cSPatrick McHardy * struct nft_set_estimate - estimation of memory and performance 324c50b960cSPatrick McHardy * characteristics 325c50b960cSPatrick McHardy * 326c50b960cSPatrick McHardy * @size: required memory 32755af753cSPablo Neira Ayuso * @lookup: lookup performance class 3280b5a7874SPablo Neira Ayuso * @space: memory class 329c50b960cSPatrick McHardy */ 330c50b960cSPatrick McHardy struct nft_set_estimate { 3314ef360ddSTaehee Yoo u64 size; 33255af753cSPablo Neira Ayuso enum nft_set_class lookup; 3330b5a7874SPablo Neira Ayuso enum nft_set_class space; 334c50b960cSPatrick McHardy }; 335c50b960cSPatrick McHardy 33692b211a2SPablo Neira Ayuso #define NFT_EXPR_MAXATTR 16 33792b211a2SPablo Neira Ayuso #define NFT_EXPR_SIZE(size) (sizeof(struct nft_expr) + \ 33892b211a2SPablo Neira Ayuso ALIGN(size, __alignof__(struct nft_expr))) 33992b211a2SPablo Neira Ayuso 34092b211a2SPablo Neira Ayuso /** 34192b211a2SPablo Neira Ayuso * struct nft_expr - nf_tables expression 34292b211a2SPablo Neira Ayuso * 34392b211a2SPablo Neira Ayuso * @ops: expression ops 34492b211a2SPablo Neira Ayuso * @data: expression private data 34592b211a2SPablo Neira Ayuso */ 34692b211a2SPablo Neira Ayuso struct nft_expr { 34792b211a2SPablo Neira Ayuso const struct nft_expr_ops *ops; 34892b211a2SPablo Neira Ayuso unsigned char data[] 34992b211a2SPablo Neira Ayuso __attribute__((aligned(__alignof__(u64)))); 35092b211a2SPablo Neira Ayuso }; 35192b211a2SPablo Neira Ayuso 35292b211a2SPablo Neira Ayuso static inline void *nft_expr_priv(const struct nft_expr *expr) 35392b211a2SPablo Neira Ayuso { 35492b211a2SPablo Neira Ayuso return (void *)expr->data; 35592b211a2SPablo Neira Ayuso } 35692b211a2SPablo Neira Ayuso 35792b211a2SPablo Neira Ayuso int nft_expr_clone(struct nft_expr *dst, struct nft_expr *src); 35892b211a2SPablo Neira Ayuso void nft_expr_destroy(const struct nft_ctx *ctx, struct nft_expr *expr); 35992b211a2SPablo Neira Ayuso int nft_expr_dump(struct sk_buff *skb, unsigned int attr, 36092b211a2SPablo Neira Ayuso const struct nft_expr *expr); 361be5650f8SPablo Neira Ayuso bool nft_expr_reduce_bitwise(struct nft_regs_track *track, 362be5650f8SPablo Neira Ayuso const struct nft_expr *expr); 36392b211a2SPablo Neira Ayuso 364b2832dd6SPatrick McHardy struct nft_set_ext; 365b2832dd6SPatrick McHardy 366c50b960cSPatrick McHardy /** 36720a69341SPatrick McHardy * struct nft_set_ops - nf_tables set operations 36820a69341SPatrick McHardy * 36920a69341SPatrick McHardy * @lookup: look up an element within the set 370d0a8d877SAnder Juaristi * @update: update an element if exists, add it if doesn't exist 371d0a8d877SAnder Juaristi * @delete: delete an element 37220a69341SPatrick McHardy * @insert: insert new element into set 373cc02e457SPatrick McHardy * @activate: activate new element in the next generation 3748411b644SPablo Neira Ayuso * @deactivate: lookup for element and deactivate it in the next generation 3751ba1c414SPablo Neira Ayuso * @flush: deactivate element in the next generation 37620a69341SPatrick McHardy * @remove: remove element from set 377d0a8d877SAnder Juaristi * @walk: iterate over all set elements 378ba0e4d99SPablo Neira Ayuso * @get: get set elements 37920a69341SPatrick McHardy * @privsize: function to return size of set private data 38020a69341SPatrick McHardy * @init: initialize private data of new set instance 38120a69341SPatrick McHardy * @destroy: destroy private data of set instance 382fe2811ebSPatrick McHardy * @elemsize: element private size 383d0a8d877SAnder Juaristi * 384d0a8d877SAnder Juaristi * Operations lookup, update and delete have simpler interfaces, are faster 385d0a8d877SAnder Juaristi * and currently only used in the packet path. All the rest are slower, 386d0a8d877SAnder Juaristi * control plane functions. 38720a69341SPatrick McHardy */ 38820a69341SPatrick McHardy struct nft_set_ops { 38942a55769SPablo Neira Ayuso bool (*lookup)(const struct net *net, 39042a55769SPablo Neira Ayuso const struct nft_set *set, 3918cd8937aSPatrick McHardy const u32 *key, 392b2832dd6SPatrick McHardy const struct nft_set_ext **ext); 39322fe54d5SPatrick McHardy bool (*update)(struct nft_set *set, 3948cd8937aSPatrick McHardy const u32 *key, 39522fe54d5SPatrick McHardy void *(*new)(struct nft_set *, 39622fe54d5SPatrick McHardy const struct nft_expr *, 397a55e22e9SPatrick McHardy struct nft_regs *), 39822fe54d5SPatrick McHardy const struct nft_expr *expr, 399a55e22e9SPatrick McHardy struct nft_regs *regs, 40022fe54d5SPatrick McHardy const struct nft_set_ext **ext); 401d0a8d877SAnder Juaristi bool (*delete)(const struct nft_set *set, 402d0a8d877SAnder Juaristi const u32 *key); 40322fe54d5SPatrick McHardy 40442a55769SPablo Neira Ayuso int (*insert)(const struct net *net, 40542a55769SPablo Neira Ayuso const struct nft_set *set, 406c016c7e4SPablo Neira Ayuso const struct nft_set_elem *elem, 407c016c7e4SPablo Neira Ayuso struct nft_set_ext **ext); 40842a55769SPablo Neira Ayuso void (*activate)(const struct net *net, 40942a55769SPablo Neira Ayuso const struct nft_set *set, 410cc02e457SPatrick McHardy const struct nft_set_elem *elem); 41142a55769SPablo Neira Ayuso void * (*deactivate)(const struct net *net, 41242a55769SPablo Neira Ayuso const struct nft_set *set, 413cc02e457SPatrick McHardy const struct nft_set_elem *elem); 4141ba1c414SPablo Neira Ayuso bool (*flush)(const struct net *net, 4158411b644SPablo Neira Ayuso const struct nft_set *set, 4168411b644SPablo Neira Ayuso void *priv); 4175cb82a38SPablo Neira Ayuso void (*remove)(const struct net *net, 4185cb82a38SPablo Neira Ayuso const struct nft_set *set, 41920a69341SPatrick McHardy const struct nft_set_elem *elem); 42020a69341SPatrick McHardy void (*walk)(const struct nft_ctx *ctx, 421de70185dSPablo Neira Ayuso struct nft_set *set, 42220a69341SPatrick McHardy struct nft_set_iter *iter); 423ba0e4d99SPablo Neira Ayuso void * (*get)(const struct net *net, 424ba0e4d99SPablo Neira Ayuso const struct nft_set *set, 425ba0e4d99SPablo Neira Ayuso const struct nft_set_elem *elem, 426ba0e4d99SPablo Neira Ayuso unsigned int flags); 42720a69341SPatrick McHardy 4284ef360ddSTaehee Yoo u64 (*privsize)(const struct nlattr * const nla[], 429347b408dSPablo Neira Ayuso const struct nft_set_desc *desc); 430c50b960cSPatrick McHardy bool (*estimate)(const struct nft_set_desc *desc, 431c50b960cSPatrick McHardy u32 features, 432c50b960cSPatrick McHardy struct nft_set_estimate *est); 43320a69341SPatrick McHardy int (*init)(const struct nft_set *set, 434c50b960cSPatrick McHardy const struct nft_set_desc *desc, 43520a69341SPatrick McHardy const struct nlattr * const nla[]); 43620a69341SPatrick McHardy void (*destroy)(const struct nft_set *set); 43779b174adSPablo Neira Ayuso void (*gc_init)(const struct nft_set *set); 43820a69341SPatrick McHardy 439fe2811ebSPatrick McHardy unsigned int elemsize; 44020a69341SPatrick McHardy }; 44120a69341SPatrick McHardy 44271cc0873SPhil Sutter /** 44371cc0873SPhil Sutter * struct nft_set_type - nf_tables set type 44471cc0873SPhil Sutter * 44571cc0873SPhil Sutter * @ops: set ops for this type 44671cc0873SPhil Sutter * @features: features supported by the implementation 44771cc0873SPhil Sutter */ 44871cc0873SPhil Sutter struct nft_set_type { 44971cc0873SPhil Sutter const struct nft_set_ops ops; 45071cc0873SPhil Sutter u32 features; 45171cc0873SPhil Sutter }; 45271cc0873SPhil Sutter #define to_set_type(o) container_of(o, struct nft_set_type, ops) 45371cc0873SPhil Sutter 454563125a7SPablo Neira Ayuso struct nft_set_elem_expr { 455563125a7SPablo Neira Ayuso u8 size; 456563125a7SPablo Neira Ayuso unsigned char data[] 457563125a7SPablo Neira Ayuso __attribute__((aligned(__alignof__(struct nft_expr)))); 458563125a7SPablo Neira Ayuso }; 459563125a7SPablo Neira Ayuso 460563125a7SPablo Neira Ayuso #define nft_setelem_expr_at(__elem_expr, __offset) \ 461563125a7SPablo Neira Ayuso ((struct nft_expr *)&__elem_expr->data[__offset]) 462563125a7SPablo Neira Ayuso 463563125a7SPablo Neira Ayuso #define nft_setelem_expr_foreach(__expr, __elem_expr, __size) \ 464563125a7SPablo Neira Ayuso for (__expr = nft_setelem_expr_at(__elem_expr, 0), __size = 0; \ 465563125a7SPablo Neira Ayuso __size < (__elem_expr)->size; \ 466563125a7SPablo Neira Ayuso __size += (__expr)->ops->size, __expr = ((void *)(__expr)) + (__expr)->ops->size) 467563125a7SPablo Neira Ayuso 4688cfd9b0fSPablo Neira Ayuso #define NFT_SET_EXPR_MAX 2 4698cfd9b0fSPablo Neira Ayuso 47020a69341SPatrick McHardy /** 47120a69341SPatrick McHardy * struct nft_set - nf_tables set instance 47220a69341SPatrick McHardy * 47320a69341SPatrick McHardy * @list: table set list node 47420a69341SPatrick McHardy * @bindings: list of set bindings 4753453c927SPablo Neira Ayuso * @table: table this set belongs to 4763453c927SPablo Neira Ayuso * @net: netnamespace this set belongs to 47720a69341SPatrick McHardy * @name: name of the set 4783ecbfd65SHarsha Sharma * @handle: unique handle of the set 47920a69341SPatrick McHardy * @ktype: key type (numeric type defined by userspace, not used in the kernel) 48020a69341SPatrick McHardy * @dtype: data type (verdict or numeric type defined by userspace) 4818aeff920SPablo Neira Ayuso * @objtype: object type (see NFT_OBJECT_* definitions) 482c50b960cSPatrick McHardy * @size: maximum set size 483f3a2181eSStefano Brivio * @field_len: length of each field in concatenation, bytes 484f3a2181eSStefano Brivio * @field_count: number of concatenated fields in element 485273fe3f1SPablo Neira Ayuso * @use: number of rules references to this set 486c50b960cSPatrick McHardy * @nelems: number of elements 4873dd0673aSPatrick McHardy * @ndeact: number of deactivated elements queued for removal 488d3e2a111SAnders K. Pedersen * @timeout: default timeout value in jiffies 489761da293SPatrick McHardy * @gc_int: garbage collection interval in msecs 4909363dc4bSArturo Borrero * @policy: set parameterization (see enum nft_set_policies) 491e6d8ecacSCarlos Falgueras García * @udlen: user data length 492e6d8ecacSCarlos Falgueras García * @udata: user data 49365038428SPablo Neira Ayuso * @expr: stateful expression 49420a69341SPatrick McHardy * @ops: set ops 49520a69341SPatrick McHardy * @flags: set flags 49637a9cc52SPablo Neira Ayuso * @genmask: generation mask 49720a69341SPatrick McHardy * @klen: key length 49820a69341SPatrick McHardy * @dlen: data length 49920a69341SPatrick McHardy * @data: private set data 50020a69341SPatrick McHardy */ 50120a69341SPatrick McHardy struct nft_set { 50220a69341SPatrick McHardy struct list_head list; 50320a69341SPatrick McHardy struct list_head bindings; 5043453c927SPablo Neira Ayuso struct nft_table *table; 5053453c927SPablo Neira Ayuso possible_net_t net; 50638745490SPhil Sutter char *name; 5073ecbfd65SHarsha Sharma u64 handle; 50820a69341SPatrick McHardy u32 ktype; 50920a69341SPatrick McHardy u32 dtype; 5108aeff920SPablo Neira Ayuso u32 objtype; 511c50b960cSPatrick McHardy u32 size; 512f3a2181eSStefano Brivio u8 field_len[NFT_REG32_COUNT]; 513f3a2181eSStefano Brivio u8 field_count; 514273fe3f1SPablo Neira Ayuso u32 use; 5153dd0673aSPatrick McHardy atomic_t nelems; 5163dd0673aSPatrick McHardy u32 ndeact; 517761da293SPatrick McHardy u64 timeout; 518761da293SPatrick McHardy u32 gc_int; 5199363dc4bSArturo Borrero u16 policy; 520e6d8ecacSCarlos Falgueras García u16 udlen; 521e6d8ecacSCarlos Falgueras García unsigned char *udata; 52220a69341SPatrick McHardy /* runtime data below here */ 52320a69341SPatrick McHardy const struct nft_set_ops *ops ____cacheline_aligned; 5246a0a8d10SPablo Neira Ayuso u16 flags:14, 52537a9cc52SPablo Neira Ayuso genmask:2; 52620a69341SPatrick McHardy u8 klen; 52720a69341SPatrick McHardy u8 dlen; 5288cfd9b0fSPablo Neira Ayuso u8 num_exprs; 5298cfd9b0fSPablo Neira Ayuso struct nft_expr *exprs[NFT_SET_EXPR_MAX]; 530aaa31047SPablo Neira Ayuso struct list_head catchall_list; 53120a69341SPatrick McHardy unsigned char data[] 53220a69341SPatrick McHardy __attribute__((aligned(__alignof__(u64)))); 53320a69341SPatrick McHardy }; 53420a69341SPatrick McHardy 535408070d6SPablo Neira Ayuso static inline bool nft_set_is_anonymous(const struct nft_set *set) 536408070d6SPablo Neira Ayuso { 537408070d6SPablo Neira Ayuso return set->flags & NFT_SET_ANONYMOUS; 538408070d6SPablo Neira Ayuso } 539408070d6SPablo Neira Ayuso 54020a69341SPatrick McHardy static inline void *nft_set_priv(const struct nft_set *set) 54120a69341SPatrick McHardy { 54220a69341SPatrick McHardy return (void *)set->data; 54320a69341SPatrick McHardy } 54420a69341SPatrick McHardy 5459d098292SPatrick McHardy static inline struct nft_set *nft_set_container_of(const void *priv) 5469d098292SPatrick McHardy { 5479d098292SPatrick McHardy return (void *)priv - offsetof(struct nft_set, data); 5489d098292SPatrick McHardy } 5499d098292SPatrick McHardy 55010659cbaSPablo Neira Ayuso struct nft_set *nft_set_lookup_global(const struct net *net, 551c7a72e3fSPablo Neira Ayuso const struct nft_table *table, 552c7a72e3fSPablo Neira Ayuso const struct nlattr *nla_set_name, 553c7a72e3fSPablo Neira Ayuso const struct nlattr *nla_set_id, 554c7a72e3fSPablo Neira Ayuso u8 genmask); 55520a69341SPatrick McHardy 556aaa31047SPablo Neira Ayuso struct nft_set_ext *nft_set_catchall_lookup(const struct net *net, 557aaa31047SPablo Neira Ayuso const struct nft_set *set); 558aaa31047SPablo Neira Ayuso void *nft_set_catchall_gc(const struct nft_set *set); 559aaa31047SPablo Neira Ayuso 560761da293SPatrick McHardy static inline unsigned long nft_set_gc_interval(const struct nft_set *set) 561761da293SPatrick McHardy { 562761da293SPatrick McHardy return set->gc_int ? msecs_to_jiffies(set->gc_int) : HZ; 563761da293SPatrick McHardy } 564761da293SPatrick McHardy 56520a69341SPatrick McHardy /** 56620a69341SPatrick McHardy * struct nft_set_binding - nf_tables set binding 56720a69341SPatrick McHardy * 56820a69341SPatrick McHardy * @list: set bindings list node 56920a69341SPatrick McHardy * @chain: chain containing the rule bound to the set 57011113e19SPatrick McHardy * @flags: set action flags 57120a69341SPatrick McHardy * 57220a69341SPatrick McHardy * A set binding contains all information necessary for validation 57320a69341SPatrick McHardy * of new elements added to a bound set. 57420a69341SPatrick McHardy */ 57520a69341SPatrick McHardy struct nft_set_binding { 57620a69341SPatrick McHardy struct list_head list; 57720a69341SPatrick McHardy const struct nft_chain *chain; 57811113e19SPatrick McHardy u32 flags; 57920a69341SPatrick McHardy }; 58020a69341SPatrick McHardy 581273fe3f1SPablo Neira Ayuso enum nft_trans_phase; 582273fe3f1SPablo Neira Ayuso void nf_tables_deactivate_set(const struct nft_ctx *ctx, struct nft_set *set, 583273fe3f1SPablo Neira Ayuso struct nft_set_binding *binding, 584273fe3f1SPablo Neira Ayuso enum nft_trans_phase phase); 5855eccdfaaSJoe Perches int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set, 58620a69341SPatrick McHardy struct nft_set_binding *binding); 587cd5125d8SFlorian Westphal void nf_tables_destroy_set(const struct nft_ctx *ctx, struct nft_set *set); 58820a69341SPatrick McHardy 5893ac4c07aSPatrick McHardy /** 5903ac4c07aSPatrick McHardy * enum nft_set_extensions - set extension type IDs 5913ac4c07aSPatrick McHardy * 5923ac4c07aSPatrick McHardy * @NFT_SET_EXT_KEY: element key 5937b225d0bSPablo Neira Ayuso * @NFT_SET_EXT_KEY_END: upper bound element key, for ranges 5943ac4c07aSPatrick McHardy * @NFT_SET_EXT_DATA: mapping data 5953ac4c07aSPatrick McHardy * @NFT_SET_EXT_FLAGS: element flags 596c3e1b005SPatrick McHardy * @NFT_SET_EXT_TIMEOUT: element timeout 597c3e1b005SPatrick McHardy * @NFT_SET_EXT_EXPIRATION: element expiration time 59868e942e8SPatrick McHardy * @NFT_SET_EXT_USERDATA: user data associated with the element 599563125a7SPablo Neira Ayuso * @NFT_SET_EXT_EXPRESSIONS: expressions assiciated with the element 6008aeff920SPablo Neira Ayuso * @NFT_SET_EXT_OBJREF: stateful object reference associated with element 6013ac4c07aSPatrick McHardy * @NFT_SET_EXT_NUM: number of extension types 6023ac4c07aSPatrick McHardy */ 6033ac4c07aSPatrick McHardy enum nft_set_extensions { 6043ac4c07aSPatrick McHardy NFT_SET_EXT_KEY, 6057b225d0bSPablo Neira Ayuso NFT_SET_EXT_KEY_END, 6063ac4c07aSPatrick McHardy NFT_SET_EXT_DATA, 6073ac4c07aSPatrick McHardy NFT_SET_EXT_FLAGS, 608c3e1b005SPatrick McHardy NFT_SET_EXT_TIMEOUT, 609c3e1b005SPatrick McHardy NFT_SET_EXT_EXPIRATION, 61068e942e8SPatrick McHardy NFT_SET_EXT_USERDATA, 611563125a7SPablo Neira Ayuso NFT_SET_EXT_EXPRESSIONS, 6128aeff920SPablo Neira Ayuso NFT_SET_EXT_OBJREF, 6133ac4c07aSPatrick McHardy NFT_SET_EXT_NUM 6143ac4c07aSPatrick McHardy }; 6153ac4c07aSPatrick McHardy 6163ac4c07aSPatrick McHardy /** 6173ac4c07aSPatrick McHardy * struct nft_set_ext_type - set extension type 6183ac4c07aSPatrick McHardy * 6193ac4c07aSPatrick McHardy * @len: fixed part length of the extension 6203ac4c07aSPatrick McHardy * @align: alignment requirements of the extension 6213ac4c07aSPatrick McHardy */ 6223ac4c07aSPatrick McHardy struct nft_set_ext_type { 6233ac4c07aSPatrick McHardy u8 len; 6243ac4c07aSPatrick McHardy u8 align; 6253ac4c07aSPatrick McHardy }; 6263ac4c07aSPatrick McHardy 6273ac4c07aSPatrick McHardy extern const struct nft_set_ext_type nft_set_ext_types[]; 6283ac4c07aSPatrick McHardy 6293ac4c07aSPatrick McHardy /** 6303ac4c07aSPatrick McHardy * struct nft_set_ext_tmpl - set extension template 6313ac4c07aSPatrick McHardy * 6323ac4c07aSPatrick McHardy * @len: length of extension area 6333ac4c07aSPatrick McHardy * @offset: offsets of individual extension types 6343ac4c07aSPatrick McHardy */ 6353ac4c07aSPatrick McHardy struct nft_set_ext_tmpl { 6363ac4c07aSPatrick McHardy u16 len; 6373ac4c07aSPatrick McHardy u8 offset[NFT_SET_EXT_NUM]; 6383ac4c07aSPatrick McHardy }; 6393ac4c07aSPatrick McHardy 6403ac4c07aSPatrick McHardy /** 6413ac4c07aSPatrick McHardy * struct nft_set_ext - set extensions 6423ac4c07aSPatrick McHardy * 643cc02e457SPatrick McHardy * @genmask: generation mask 6443ac4c07aSPatrick McHardy * @offset: offsets of individual extension types 6453ac4c07aSPatrick McHardy * @data: beginning of extension data 6463ac4c07aSPatrick McHardy */ 6473ac4c07aSPatrick McHardy struct nft_set_ext { 648cc02e457SPatrick McHardy u8 genmask; 6493ac4c07aSPatrick McHardy u8 offset[NFT_SET_EXT_NUM]; 6506daf1414SGustavo A. R. Silva char data[]; 6513ac4c07aSPatrick McHardy }; 6523ac4c07aSPatrick McHardy 6533ac4c07aSPatrick McHardy static inline void nft_set_ext_prepare(struct nft_set_ext_tmpl *tmpl) 6543ac4c07aSPatrick McHardy { 6553ac4c07aSPatrick McHardy memset(tmpl, 0, sizeof(*tmpl)); 6563ac4c07aSPatrick McHardy tmpl->len = sizeof(struct nft_set_ext); 6573ac4c07aSPatrick McHardy } 6583ac4c07aSPatrick McHardy 6593ac4c07aSPatrick McHardy static inline void nft_set_ext_add_length(struct nft_set_ext_tmpl *tmpl, u8 id, 6603ac4c07aSPatrick McHardy unsigned int len) 6613ac4c07aSPatrick McHardy { 6623ac4c07aSPatrick McHardy tmpl->len = ALIGN(tmpl->len, nft_set_ext_types[id].align); 6633ac4c07aSPatrick McHardy BUG_ON(tmpl->len > U8_MAX); 6643ac4c07aSPatrick McHardy tmpl->offset[id] = tmpl->len; 6653ac4c07aSPatrick McHardy tmpl->len += nft_set_ext_types[id].len + len; 6663ac4c07aSPatrick McHardy } 6673ac4c07aSPatrick McHardy 6683ac4c07aSPatrick McHardy static inline void nft_set_ext_add(struct nft_set_ext_tmpl *tmpl, u8 id) 6693ac4c07aSPatrick McHardy { 6703ac4c07aSPatrick McHardy nft_set_ext_add_length(tmpl, id, 0); 6713ac4c07aSPatrick McHardy } 6723ac4c07aSPatrick McHardy 6733ac4c07aSPatrick McHardy static inline void nft_set_ext_init(struct nft_set_ext *ext, 6743ac4c07aSPatrick McHardy const struct nft_set_ext_tmpl *tmpl) 6753ac4c07aSPatrick McHardy { 6763ac4c07aSPatrick McHardy memcpy(ext->offset, tmpl->offset, sizeof(ext->offset)); 6773ac4c07aSPatrick McHardy } 6783ac4c07aSPatrick McHardy 6793ac4c07aSPatrick McHardy static inline bool __nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) 6803ac4c07aSPatrick McHardy { 6813ac4c07aSPatrick McHardy return !!ext->offset[id]; 6823ac4c07aSPatrick McHardy } 6833ac4c07aSPatrick McHardy 6843ac4c07aSPatrick McHardy static inline bool nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) 6853ac4c07aSPatrick McHardy { 6863ac4c07aSPatrick McHardy return ext && __nft_set_ext_exists(ext, id); 6873ac4c07aSPatrick McHardy } 6883ac4c07aSPatrick McHardy 6893ac4c07aSPatrick McHardy static inline void *nft_set_ext(const struct nft_set_ext *ext, u8 id) 6903ac4c07aSPatrick McHardy { 6913ac4c07aSPatrick McHardy return (void *)ext + ext->offset[id]; 6923ac4c07aSPatrick McHardy } 6933ac4c07aSPatrick McHardy 6943ac4c07aSPatrick McHardy static inline struct nft_data *nft_set_ext_key(const struct nft_set_ext *ext) 6953ac4c07aSPatrick McHardy { 6963ac4c07aSPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_KEY); 6973ac4c07aSPatrick McHardy } 6983ac4c07aSPatrick McHardy 6997b225d0bSPablo Neira Ayuso static inline struct nft_data *nft_set_ext_key_end(const struct nft_set_ext *ext) 7007b225d0bSPablo Neira Ayuso { 7017b225d0bSPablo Neira Ayuso return nft_set_ext(ext, NFT_SET_EXT_KEY_END); 7027b225d0bSPablo Neira Ayuso } 7037b225d0bSPablo Neira Ayuso 7043ac4c07aSPatrick McHardy static inline struct nft_data *nft_set_ext_data(const struct nft_set_ext *ext) 7053ac4c07aSPatrick McHardy { 7063ac4c07aSPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_DATA); 7073ac4c07aSPatrick McHardy } 7083ac4c07aSPatrick McHardy 7093ac4c07aSPatrick McHardy static inline u8 *nft_set_ext_flags(const struct nft_set_ext *ext) 7103ac4c07aSPatrick McHardy { 7113ac4c07aSPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_FLAGS); 7123ac4c07aSPatrick McHardy } 713ef1f7df9SPatrick McHardy 714c3e1b005SPatrick McHardy static inline u64 *nft_set_ext_timeout(const struct nft_set_ext *ext) 715c3e1b005SPatrick McHardy { 716c3e1b005SPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_TIMEOUT); 717c3e1b005SPatrick McHardy } 718c3e1b005SPatrick McHardy 7198e1102d5SFlorian Westphal static inline u64 *nft_set_ext_expiration(const struct nft_set_ext *ext) 720c3e1b005SPatrick McHardy { 721c3e1b005SPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_EXPIRATION); 722c3e1b005SPatrick McHardy } 723c3e1b005SPatrick McHardy 72468e942e8SPatrick McHardy static inline struct nft_userdata *nft_set_ext_userdata(const struct nft_set_ext *ext) 72568e942e8SPatrick McHardy { 72668e942e8SPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_USERDATA); 72768e942e8SPatrick McHardy } 72868e942e8SPatrick McHardy 729563125a7SPablo Neira Ayuso static inline struct nft_set_elem_expr *nft_set_ext_expr(const struct nft_set_ext *ext) 730f25ad2e9SPatrick McHardy { 731563125a7SPablo Neira Ayuso return nft_set_ext(ext, NFT_SET_EXT_EXPRESSIONS); 732f25ad2e9SPatrick McHardy } 733f25ad2e9SPatrick McHardy 734c3e1b005SPatrick McHardy static inline bool nft_set_elem_expired(const struct nft_set_ext *ext) 735c3e1b005SPatrick McHardy { 736c3e1b005SPatrick McHardy return nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION) && 7378e1102d5SFlorian Westphal time_is_before_eq_jiffies64(*nft_set_ext_expiration(ext)); 738c3e1b005SPatrick McHardy } 739c3e1b005SPatrick McHardy 740fe2811ebSPatrick McHardy static inline struct nft_set_ext *nft_set_elem_ext(const struct nft_set *set, 741fe2811ebSPatrick McHardy void *elem) 742fe2811ebSPatrick McHardy { 743fe2811ebSPatrick McHardy return elem + set->ops->elemsize; 744fe2811ebSPatrick McHardy } 745fe2811ebSPatrick McHardy 7468aeff920SPablo Neira Ayuso static inline struct nft_object **nft_set_ext_obj(const struct nft_set_ext *ext) 7478aeff920SPablo Neira Ayuso { 7488aeff920SPablo Neira Ayuso return nft_set_ext(ext, NFT_SET_EXT_OBJREF); 7498aeff920SPablo Neira Ayuso } 7508aeff920SPablo Neira Ayuso 751a7fc9368SPablo Neira Ayuso struct nft_expr *nft_set_elem_expr_alloc(const struct nft_ctx *ctx, 752a7fc9368SPablo Neira Ayuso const struct nft_set *set, 753a7fc9368SPablo Neira Ayuso const struct nlattr *attr); 754a7fc9368SPablo Neira Ayuso 75522fe54d5SPatrick McHardy void *nft_set_elem_init(const struct nft_set *set, 75622fe54d5SPatrick McHardy const struct nft_set_ext_tmpl *tmpl, 7577b225d0bSPablo Neira Ayuso const u32 *key, const u32 *key_end, const u32 *data, 75879ebb5bbSLaura Garcia Liebana u64 timeout, u64 expiration, gfp_t gfp); 759fca05d4dSPablo Neira Ayuso int nft_set_elem_expr_clone(const struct nft_ctx *ctx, struct nft_set *set, 760fca05d4dSPablo Neira Ayuso struct nft_expr *expr_array[]); 76161f9e292SLiping Zhang void nft_set_elem_destroy(const struct nft_set *set, void *elem, 76261f9e292SLiping Zhang bool destroy_expr); 76361edafbbSPatrick McHardy 76420a69341SPatrick McHardy /** 765cfed7e1bSPatrick McHardy * struct nft_set_gc_batch_head - nf_tables set garbage collection batch 766cfed7e1bSPatrick McHardy * 767cfed7e1bSPatrick McHardy * @rcu: rcu head 768cfed7e1bSPatrick McHardy * @set: set the elements belong to 769cfed7e1bSPatrick McHardy * @cnt: count of elements 770cfed7e1bSPatrick McHardy */ 771cfed7e1bSPatrick McHardy struct nft_set_gc_batch_head { 772cfed7e1bSPatrick McHardy struct rcu_head rcu; 773cfed7e1bSPatrick McHardy const struct nft_set *set; 774cfed7e1bSPatrick McHardy unsigned int cnt; 775cfed7e1bSPatrick McHardy }; 776cfed7e1bSPatrick McHardy 777cfed7e1bSPatrick McHardy #define NFT_SET_GC_BATCH_SIZE ((PAGE_SIZE - \ 778cfed7e1bSPatrick McHardy sizeof(struct nft_set_gc_batch_head)) / \ 779cfed7e1bSPatrick McHardy sizeof(void *)) 780cfed7e1bSPatrick McHardy 781cfed7e1bSPatrick McHardy /** 782cfed7e1bSPatrick McHardy * struct nft_set_gc_batch - nf_tables set garbage collection batch 783cfed7e1bSPatrick McHardy * 784cfed7e1bSPatrick McHardy * @head: GC batch head 785cfed7e1bSPatrick McHardy * @elems: garbage collection elements 786cfed7e1bSPatrick McHardy */ 787cfed7e1bSPatrick McHardy struct nft_set_gc_batch { 788cfed7e1bSPatrick McHardy struct nft_set_gc_batch_head head; 789cfed7e1bSPatrick McHardy void *elems[NFT_SET_GC_BATCH_SIZE]; 790cfed7e1bSPatrick McHardy }; 791cfed7e1bSPatrick McHardy 792cfed7e1bSPatrick McHardy struct nft_set_gc_batch *nft_set_gc_batch_alloc(const struct nft_set *set, 793cfed7e1bSPatrick McHardy gfp_t gfp); 794cfed7e1bSPatrick McHardy void nft_set_gc_batch_release(struct rcu_head *rcu); 795cfed7e1bSPatrick McHardy 796cfed7e1bSPatrick McHardy static inline void nft_set_gc_batch_complete(struct nft_set_gc_batch *gcb) 797cfed7e1bSPatrick McHardy { 798cfed7e1bSPatrick McHardy if (gcb != NULL) 799cfed7e1bSPatrick McHardy call_rcu(&gcb->head.rcu, nft_set_gc_batch_release); 800cfed7e1bSPatrick McHardy } 801cfed7e1bSPatrick McHardy 802cfed7e1bSPatrick McHardy static inline struct nft_set_gc_batch * 803cfed7e1bSPatrick McHardy nft_set_gc_batch_check(const struct nft_set *set, struct nft_set_gc_batch *gcb, 804cfed7e1bSPatrick McHardy gfp_t gfp) 805cfed7e1bSPatrick McHardy { 806cfed7e1bSPatrick McHardy if (gcb != NULL) { 807cfed7e1bSPatrick McHardy if (gcb->head.cnt + 1 < ARRAY_SIZE(gcb->elems)) 808cfed7e1bSPatrick McHardy return gcb; 809cfed7e1bSPatrick McHardy nft_set_gc_batch_complete(gcb); 810cfed7e1bSPatrick McHardy } 811cfed7e1bSPatrick McHardy return nft_set_gc_batch_alloc(set, gfp); 812cfed7e1bSPatrick McHardy } 813cfed7e1bSPatrick McHardy 814cfed7e1bSPatrick McHardy static inline void nft_set_gc_batch_add(struct nft_set_gc_batch *gcb, 815cfed7e1bSPatrick McHardy void *elem) 816cfed7e1bSPatrick McHardy { 817cfed7e1bSPatrick McHardy gcb->elems[gcb->head.cnt++] = elem; 818cfed7e1bSPatrick McHardy } 819cfed7e1bSPatrick McHardy 820b8e20400SPablo Neira Ayuso struct nft_expr_ops; 821cfed7e1bSPatrick McHardy /** 822ef1f7df9SPatrick McHardy * struct nft_expr_type - nf_tables expression type 82396518518SPatrick McHardy * 824ef1f7df9SPatrick McHardy * @select_ops: function to select nft_expr_ops 825b8e20400SPablo Neira Ayuso * @release_ops: release nft_expr_ops 826ef1f7df9SPatrick McHardy * @ops: default ops, used when no select_ops functions is present 82796518518SPatrick McHardy * @list: used internally 82896518518SPatrick McHardy * @name: Identifier 82996518518SPatrick McHardy * @owner: module reference 83096518518SPatrick McHardy * @policy: netlink attribute policy 83196518518SPatrick McHardy * @maxattr: highest netlink attribute number 83264d46806SPatrick McHardy * @family: address family for AF-specific types 833151d799aSPatrick McHardy * @flags: expression type flags 834ef1f7df9SPatrick McHardy */ 835ef1f7df9SPatrick McHardy struct nft_expr_type { 8360ca743a5SPablo Neira Ayuso const struct nft_expr_ops *(*select_ops)(const struct nft_ctx *, 8370ca743a5SPablo Neira Ayuso const struct nlattr * const tb[]); 838b8e20400SPablo Neira Ayuso void (*release_ops)(const struct nft_expr_ops *ops); 839ef1f7df9SPatrick McHardy const struct nft_expr_ops *ops; 840ef1f7df9SPatrick McHardy struct list_head list; 841ef1f7df9SPatrick McHardy const char *name; 842ef1f7df9SPatrick McHardy struct module *owner; 843ef1f7df9SPatrick McHardy const struct nla_policy *policy; 844ef1f7df9SPatrick McHardy unsigned int maxattr; 84564d46806SPatrick McHardy u8 family; 846151d799aSPatrick McHardy u8 flags; 847ef1f7df9SPatrick McHardy }; 848ef1f7df9SPatrick McHardy 849151d799aSPatrick McHardy #define NFT_EXPR_STATEFUL 0x1 85079b174adSPablo Neira Ayuso #define NFT_EXPR_GC 0x2 851151d799aSPatrick McHardy 852f6ac8585SPablo Neira Ayuso enum nft_trans_phase { 853f6ac8585SPablo Neira Ayuso NFT_TRANS_PREPARE, 854f6ac8585SPablo Neira Ayuso NFT_TRANS_ABORT, 855f6ac8585SPablo Neira Ayuso NFT_TRANS_COMMIT, 856f6ac8585SPablo Neira Ayuso NFT_TRANS_RELEASE 857f6ac8585SPablo Neira Ayuso }; 858f6ac8585SPablo Neira Ayuso 859c9626a2cSPablo Neira Ayuso struct nft_flow_rule; 860c9626a2cSPablo Neira Ayuso struct nft_offload_ctx; 861c9626a2cSPablo Neira Ayuso 862ef1f7df9SPatrick McHardy /** 863ef1f7df9SPatrick McHardy * struct nft_expr_ops - nf_tables expression operations 864ef1f7df9SPatrick McHardy * 865ef1f7df9SPatrick McHardy * @eval: Expression evaluation function 86696518518SPatrick McHardy * @size: full expression size, including private data size 867ef1f7df9SPatrick McHardy * @init: initialization function 868cd5125d8SFlorian Westphal * @activate: activate expression in the next generation 869cd5125d8SFlorian Westphal * @deactivate: deactivate expression in next generation 870cd5125d8SFlorian Westphal * @destroy: destruction function, called after synchronize_rcu 871ef1f7df9SPatrick McHardy * @dump: function to dump parameters 872ef1f7df9SPatrick McHardy * @type: expression type 8730ca743a5SPablo Neira Ayuso * @validate: validate expression, called during loop detection 8740ca743a5SPablo Neira Ayuso * @data: extra data to attach to this expression operation 87596518518SPatrick McHardy */ 87696518518SPatrick McHardy struct nft_expr_ops { 87796518518SPatrick McHardy void (*eval)(const struct nft_expr *expr, 878a55e22e9SPatrick McHardy struct nft_regs *regs, 87996518518SPatrick McHardy const struct nft_pktinfo *pkt); 880086f3321SPablo Neira Ayuso int (*clone)(struct nft_expr *dst, 881086f3321SPablo Neira Ayuso const struct nft_expr *src); 882ef1f7df9SPatrick McHardy unsigned int size; 883ef1f7df9SPatrick McHardy 88496518518SPatrick McHardy int (*init)(const struct nft_ctx *ctx, 88596518518SPatrick McHardy const struct nft_expr *expr, 88696518518SPatrick McHardy const struct nlattr * const tb[]); 887bb7b40aeSPablo Neira Ayuso void (*activate)(const struct nft_ctx *ctx, 888bb7b40aeSPablo Neira Ayuso const struct nft_expr *expr); 889bb7b40aeSPablo Neira Ayuso void (*deactivate)(const struct nft_ctx *ctx, 890f6ac8585SPablo Neira Ayuso const struct nft_expr *expr, 891f6ac8585SPablo Neira Ayuso enum nft_trans_phase phase); 89262472bceSPatrick McHardy void (*destroy)(const struct nft_ctx *ctx, 89362472bceSPatrick McHardy const struct nft_expr *expr); 894371ebcbbSPablo Neira Ayuso void (*destroy_clone)(const struct nft_ctx *ctx, 895371ebcbbSPablo Neira Ayuso const struct nft_expr *expr); 89696518518SPatrick McHardy int (*dump)(struct sk_buff *skb, 89796518518SPatrick McHardy const struct nft_expr *expr); 8980ca743a5SPablo Neira Ayuso int (*validate)(const struct nft_ctx *ctx, 8990ca743a5SPablo Neira Ayuso const struct nft_expr *expr, 9000ca743a5SPablo Neira Ayuso const struct nft_data **data); 90112e4ecfaSPablo Neira Ayuso bool (*reduce)(struct nft_regs_track *track, 90212e4ecfaSPablo Neira Ayuso const struct nft_expr *expr); 90379b174adSPablo Neira Ayuso bool (*gc)(struct net *net, 90479b174adSPablo Neira Ayuso const struct nft_expr *expr); 905c9626a2cSPablo Neira Ayuso int (*offload)(struct nft_offload_ctx *ctx, 906c9626a2cSPablo Neira Ayuso struct nft_flow_rule *flow, 907c9626a2cSPablo Neira Ayuso const struct nft_expr *expr); 908*b1a5983fSPablo Neira Ayuso bool (*offload_action)(const struct nft_expr *expr); 909b72920f6SPablo Neira Ayuso void (*offload_stats)(struct nft_expr *expr, 910b72920f6SPablo Neira Ayuso const struct flow_stats *stats); 911ef1f7df9SPatrick McHardy const struct nft_expr_type *type; 9120ca743a5SPablo Neira Ayuso void *data; 91396518518SPatrick McHardy }; 91496518518SPatrick McHardy 91596518518SPatrick McHardy /** 91696518518SPatrick McHardy * struct nft_rule - nf_tables rule 91796518518SPatrick McHardy * 91896518518SPatrick McHardy * @list: used internally 91996518518SPatrick McHardy * @handle: rule handle 9200628b123SPablo Neira Ayuso * @genmask: generation mask 92196518518SPatrick McHardy * @dlen: length of expression data 92286f1ec32SPatrick McHardy * @udata: user data is appended to the rule 92396518518SPatrick McHardy * @data: expression data 92496518518SPatrick McHardy */ 92596518518SPatrick McHardy struct nft_rule { 92696518518SPatrick McHardy struct list_head list; 9270768b3b3SPablo Neira Ayuso u64 handle:42, 9280628b123SPablo Neira Ayuso genmask:2, 9290768b3b3SPablo Neira Ayuso dlen:12, 93086f1ec32SPatrick McHardy udata:1; 93196518518SPatrick McHardy unsigned char data[] 93296518518SPatrick McHardy __attribute__((aligned(__alignof__(struct nft_expr)))); 93396518518SPatrick McHardy }; 93496518518SPatrick McHardy 93596518518SPatrick McHardy static inline struct nft_expr *nft_expr_first(const struct nft_rule *rule) 93696518518SPatrick McHardy { 93796518518SPatrick McHardy return (struct nft_expr *)&rule->data[0]; 93896518518SPatrick McHardy } 93996518518SPatrick McHardy 94096518518SPatrick McHardy static inline struct nft_expr *nft_expr_next(const struct nft_expr *expr) 94196518518SPatrick McHardy { 94296518518SPatrick McHardy return ((void *)expr) + expr->ops->size; 94396518518SPatrick McHardy } 94496518518SPatrick McHardy 94596518518SPatrick McHardy static inline struct nft_expr *nft_expr_last(const struct nft_rule *rule) 94696518518SPatrick McHardy { 94796518518SPatrick McHardy return (struct nft_expr *)&rule->data[rule->dlen]; 94896518518SPatrick McHardy } 94996518518SPatrick McHardy 95031cc578aSSaeed Mirzamohammadi static inline bool nft_expr_more(const struct nft_rule *rule, 95131cc578aSSaeed Mirzamohammadi const struct nft_expr *expr) 95231cc578aSSaeed Mirzamohammadi { 95331cc578aSSaeed Mirzamohammadi return expr != nft_expr_last(rule) && expr->ops; 95431cc578aSSaeed Mirzamohammadi } 95531cc578aSSaeed Mirzamohammadi 95686f1ec32SPatrick McHardy static inline struct nft_userdata *nft_userdata(const struct nft_rule *rule) 9570768b3b3SPablo Neira Ayuso { 9580768b3b3SPablo Neira Ayuso return (void *)&rule->data[rule->dlen]; 9590768b3b3SPablo Neira Ayuso } 9600768b3b3SPablo Neira Ayuso 961d0e2c7deSPablo Neira Ayuso void nf_tables_rule_release(const struct nft_ctx *ctx, struct nft_rule *rule); 962d0e2c7deSPablo Neira Ayuso 96376adfafeSPablo Neira Ayuso static inline void nft_set_elem_update_expr(const struct nft_set_ext *ext, 96476adfafeSPablo Neira Ayuso struct nft_regs *regs, 96576adfafeSPablo Neira Ayuso const struct nft_pktinfo *pkt) 96676adfafeSPablo Neira Ayuso { 967563125a7SPablo Neira Ayuso struct nft_set_elem_expr *elem_expr; 96876adfafeSPablo Neira Ayuso struct nft_expr *expr; 969563125a7SPablo Neira Ayuso u32 size; 97076adfafeSPablo Neira Ayuso 971563125a7SPablo Neira Ayuso if (__nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS)) { 972563125a7SPablo Neira Ayuso elem_expr = nft_set_ext_expr(ext); 973563125a7SPablo Neira Ayuso nft_setelem_expr_foreach(expr, elem_expr, size) { 97476adfafeSPablo Neira Ayuso expr->ops->eval(expr, regs, pkt); 975563125a7SPablo Neira Ayuso if (regs->verdict.code == NFT_BREAK) 976563125a7SPablo Neira Ayuso return; 977563125a7SPablo Neira Ayuso } 97876adfafeSPablo Neira Ayuso } 97976adfafeSPablo Neira Ayuso } 98076adfafeSPablo Neira Ayuso 98196518518SPatrick McHardy /* 98296518518SPatrick McHardy * The last pointer isn't really necessary, but the compiler isn't able to 98396518518SPatrick McHardy * determine that the result of nft_expr_last() is always the same since it 98496518518SPatrick McHardy * can't assume that the dlen value wasn't changed within calls in the loop. 98596518518SPatrick McHardy */ 98696518518SPatrick McHardy #define nft_rule_for_each_expr(expr, last, rule) \ 98796518518SPatrick McHardy for ((expr) = nft_expr_first(rule), (last) = nft_expr_last(rule); \ 98896518518SPatrick McHardy (expr) != (last); \ 98996518518SPatrick McHardy (expr) = nft_expr_next(expr)) 99096518518SPatrick McHardy 991ad652f38SPablo Neira Ayuso #define NFT_CHAIN_POLICY_UNSET U8_MAX 992ad652f38SPablo Neira Ayuso 9932c865a8aSPablo Neira Ayuso struct nft_rule_dp { 9942c865a8aSPablo Neira Ayuso u64 is_last:1, 9952c865a8aSPablo Neira Ayuso dlen:12, 9962c865a8aSPablo Neira Ayuso handle:42; /* for tracing */ 9972c865a8aSPablo Neira Ayuso unsigned char data[] 9982c865a8aSPablo Neira Ayuso __attribute__((aligned(__alignof__(struct nft_expr)))); 9992c865a8aSPablo Neira Ayuso }; 10002c865a8aSPablo Neira Ayuso 10012c865a8aSPablo Neira Ayuso struct nft_rule_blob { 10022c865a8aSPablo Neira Ayuso unsigned long size; 10032c865a8aSPablo Neira Ayuso unsigned char data[] 10042c865a8aSPablo Neira Ayuso __attribute__((aligned(__alignof__(struct nft_rule_dp)))); 10052c865a8aSPablo Neira Ayuso }; 10062c865a8aSPablo Neira Ayuso 100796518518SPatrick McHardy /** 100896518518SPatrick McHardy * struct nft_chain - nf_tables chain 100996518518SPatrick McHardy * 101096518518SPatrick McHardy * @rules: list of rules in the chain 101196518518SPatrick McHardy * @list: used internally 10121b2470e5SFlorian Westphal * @rhlhead: used internally 1013b5bc89bfSPablo Neira Ayuso * @table: table that this chain belongs to 101496518518SPatrick McHardy * @handle: chain handle 101596518518SPatrick McHardy * @use: number of jump references to this chain 1016a0a7379eSPablo Neira Ayuso * @flags: bitmask of enum nft_chain_flags 101796518518SPatrick McHardy * @name: name of the chain 101896518518SPatrick McHardy */ 101996518518SPatrick McHardy struct nft_chain { 10202c865a8aSPablo Neira Ayuso struct nft_rule_blob __rcu *blob_gen_0; 10212c865a8aSPablo Neira Ayuso struct nft_rule_blob __rcu *blob_gen_1; 102296518518SPatrick McHardy struct list_head rules; 102396518518SPatrick McHardy struct list_head list; 10241b2470e5SFlorian Westphal struct rhlist_head rhlhead; 1025b5bc89bfSPablo Neira Ayuso struct nft_table *table; 102696518518SPatrick McHardy u64 handle; 1027a0a7379eSPablo Neira Ayuso u32 use; 1028d0e2c7deSPablo Neira Ayuso u8 flags:5, 1029d0e2c7deSPablo Neira Ayuso bound:1, 1030664b0f8cSPablo Neira Ayuso genmask:2; 1031b7263e07SPhil Sutter char *name; 1032002f2176SJose M. Guisado Gomez u16 udlen; 1033002f2176SJose M. Guisado Gomez u8 *udata; 10340cbc06b3SFlorian Westphal 10350cbc06b3SFlorian Westphal /* Only used during control plane commit phase: */ 10362c865a8aSPablo Neira Ayuso struct nft_rule_blob *blob_next; 103796518518SPatrick McHardy }; 103896518518SPatrick McHardy 1039a654de8fSPablo Neira Ayuso int nft_chain_validate(const struct nft_ctx *ctx, const struct nft_chain *chain); 1040a654de8fSPablo Neira Ayuso 104132537e91SPablo Neira Ayuso enum nft_chain_types { 10429370761cSPablo Neira Ayuso NFT_CHAIN_T_DEFAULT = 0, 10439370761cSPablo Neira Ayuso NFT_CHAIN_T_ROUTE, 10449370761cSPablo Neira Ayuso NFT_CHAIN_T_NAT, 10459370761cSPablo Neira Ayuso NFT_CHAIN_T_MAX 10469370761cSPablo Neira Ayuso }; 10479370761cSPablo Neira Ayuso 10481a1e1a12SPatrick McHardy /** 104932537e91SPablo Neira Ayuso * struct nft_chain_type - nf_tables chain type info 10501a1e1a12SPatrick McHardy * 10511a1e1a12SPatrick McHardy * @name: name of the type 10521a1e1a12SPatrick McHardy * @type: numeric identifier 10531a1e1a12SPatrick McHardy * @family: address family 10541a1e1a12SPatrick McHardy * @owner: module owner 10551a1e1a12SPatrick McHardy * @hook_mask: mask of valid hooks 1056c2f9eafeSPablo Neira Ayuso * @hooks: array of hook functions 10574e25ceb8SFlorian Westphal * @ops_register: base chain register function 10584e25ceb8SFlorian Westphal * @ops_unregister: base chain unregister function 10591a1e1a12SPatrick McHardy */ 106032537e91SPablo Neira Ayuso struct nft_chain_type { 10611a1e1a12SPatrick McHardy const char *name; 106232537e91SPablo Neira Ayuso enum nft_chain_types type; 10631a1e1a12SPatrick McHardy int family; 10641a1e1a12SPatrick McHardy struct module *owner; 10651a1e1a12SPatrick McHardy unsigned int hook_mask; 1066d25e2e93SPablo Neira Ayuso nf_hookfn *hooks[NFT_MAX_HOOKS]; 10674e25ceb8SFlorian Westphal int (*ops_register)(struct net *net, const struct nf_hook_ops *ops); 10684e25ceb8SFlorian Westphal void (*ops_unregister)(struct net *net, const struct nf_hook_ops *ops); 10691a1e1a12SPatrick McHardy }; 10701a1e1a12SPatrick McHardy 10717210e4e3SPablo Neira Ayuso int nft_chain_validate_dependency(const struct nft_chain *chain, 107232537e91SPablo Neira Ayuso enum nft_chain_types type); 107375e8d06dSPablo Neira Ayuso int nft_chain_validate_hooks(const struct nft_chain *chain, 107475e8d06dSPablo Neira Ayuso unsigned int hook_flags); 10757210e4e3SPablo Neira Ayuso 1076d0e2c7deSPablo Neira Ayuso static inline bool nft_chain_is_bound(struct nft_chain *chain) 1077d0e2c7deSPablo Neira Ayuso { 1078d0e2c7deSPablo Neira Ayuso return (chain->flags & NFT_CHAIN_BINDING) && chain->bound; 1079d0e2c7deSPablo Neira Ayuso } 1080d0e2c7deSPablo Neira Ayuso 1081d0e2c7deSPablo Neira Ayuso void nft_chain_del(struct nft_chain *chain); 1082d0e2c7deSPablo Neira Ayuso void nf_tables_chain_destroy(struct nft_ctx *ctx); 1083d0e2c7deSPablo Neira Ayuso 10840ca743a5SPablo Neira Ayuso struct nft_stats { 10850ca743a5SPablo Neira Ayuso u64 bytes; 10860ca743a5SPablo Neira Ayuso u64 pkts; 1087ce355e20SEric Dumazet struct u64_stats_sync syncp; 10880ca743a5SPablo Neira Ayuso }; 10890ca743a5SPablo Neira Ayuso 10903f0465a9SPablo Neira Ayuso struct nft_hook { 10913f0465a9SPablo Neira Ayuso struct list_head list; 1092abadb2f8SPablo Neira Ayuso bool inactive; 10933f0465a9SPablo Neira Ayuso struct nf_hook_ops ops; 10943f0465a9SPablo Neira Ayuso struct rcu_head rcu; 10953f0465a9SPablo Neira Ayuso }; 10963f0465a9SPablo Neira Ayuso 109796518518SPatrick McHardy /** 109896518518SPatrick McHardy * struct nft_base_chain - nf_tables base chain 109996518518SPatrick McHardy * 110096518518SPatrick McHardy * @ops: netfilter hook ops 1101d54725cdSPablo Neira Ayuso * @hook_list: list of netfilter hooks (for NFPROTO_NETDEV family) 11029370761cSPablo Neira Ayuso * @type: chain type 11030ca743a5SPablo Neira Ayuso * @policy: default policy 11040ca743a5SPablo Neira Ayuso * @stats: per-cpu chain stats 110596518518SPatrick McHardy * @chain: the chain 110614bfb13fSPablo Neira Ayuso * @flow_block: flow block (for hardware offload) 110796518518SPatrick McHardy */ 110896518518SPatrick McHardy struct nft_base_chain { 1109c974a3a3SPablo Neira Ayuso struct nf_hook_ops ops; 1110d54725cdSPablo Neira Ayuso struct list_head hook_list; 111132537e91SPablo Neira Ayuso const struct nft_chain_type *type; 11120ca743a5SPablo Neira Ayuso u8 policy; 1113835b8033SPablo Neira Ayuso u8 flags; 11140ca743a5SPablo Neira Ayuso struct nft_stats __percpu *stats; 111596518518SPatrick McHardy struct nft_chain chain; 111614bfb13fSPablo Neira Ayuso struct flow_block flow_block; 111796518518SPatrick McHardy }; 111896518518SPatrick McHardy 111996518518SPatrick McHardy static inline struct nft_base_chain *nft_base_chain(const struct nft_chain *chain) 112096518518SPatrick McHardy { 112196518518SPatrick McHardy return container_of(chain, struct nft_base_chain, chain); 112296518518SPatrick McHardy } 112396518518SPatrick McHardy 1124f323d954SPablo Neira Ayuso static inline bool nft_is_base_chain(const struct nft_chain *chain) 1125f323d954SPablo Neira Ayuso { 112667c49de4SPablo Neira Ayuso return chain->flags & NFT_CHAIN_BASE; 1127f323d954SPablo Neira Ayuso } 1128f323d954SPablo Neira Ayuso 11295ebe0b0eSPablo Neira Ayuso int __nft_release_basechain(struct nft_ctx *ctx); 1130835b8033SPablo Neira Ayuso 113106198b34SEric W. Biederman unsigned int nft_do_chain(struct nft_pktinfo *pkt, void *priv); 113296518518SPatrick McHardy 113396518518SPatrick McHardy /** 113496518518SPatrick McHardy * struct nft_table - nf_tables table 113596518518SPatrick McHardy * 113696518518SPatrick McHardy * @list: used internally 11371b2470e5SFlorian Westphal * @chains_ht: chains in the table 11381b2470e5SFlorian Westphal * @chains: same, for stable walks 113996518518SPatrick McHardy * @sets: sets in the table 1140e5009240SPablo Neira Ayuso * @objects: stateful objects in the table 11413b49e2e9SPablo Neira Ayuso * @flowtables: flow tables in the table 114296518518SPatrick McHardy * @hgenerator: handle generator state 11433ecbfd65SHarsha Sharma * @handle: table handle 114496518518SPatrick McHardy * @use: number of chain references to this table 114596518518SPatrick McHardy * @flags: table flag (see enum nft_table_flags) 1146f2a6d766SPablo Neira Ayuso * @genmask: generation mask 114736596dadSPablo Neira Ayuso * @afinfo: address family info 114896518518SPatrick McHardy * @name: name of the table 114996518518SPatrick McHardy */ 115096518518SPatrick McHardy struct nft_table { 115196518518SPatrick McHardy struct list_head list; 11521b2470e5SFlorian Westphal struct rhltable chains_ht; 115396518518SPatrick McHardy struct list_head chains; 115496518518SPatrick McHardy struct list_head sets; 1155e5009240SPablo Neira Ayuso struct list_head objects; 11563b49e2e9SPablo Neira Ayuso struct list_head flowtables; 115796518518SPatrick McHardy u64 hgenerator; 11583ecbfd65SHarsha Sharma u64 handle; 115996518518SPatrick McHardy u32 use; 116098319cb9SPablo Neira Ayuso u16 family:6, 116198319cb9SPablo Neira Ayuso flags:8, 1162f2a6d766SPablo Neira Ayuso genmask:2; 11636001a930SPablo Neira Ayuso u32 nlpid; 1164e46abbccSPhil Sutter char *name; 11657a81575bSJose M. Guisado Gomez u16 udlen; 11667a81575bSJose M. Guisado Gomez u8 *udata; 1167ebddf1a8SPablo Neira Ayuso }; 1168ebddf1a8SPablo Neira Ayuso 11696001a930SPablo Neira Ayuso static inline bool nft_table_has_owner(const struct nft_table *table) 11706001a930SPablo Neira Ayuso { 11716001a930SPablo Neira Ayuso return table->flags & NFT_TABLE_F_OWNER; 11726001a930SPablo Neira Ayuso } 11736001a930SPablo Neira Ayuso 1174d3519cb8SPablo Neira Ayuso static inline bool nft_base_chain_netdev(int family, u32 hooknum) 1175d3519cb8SPablo Neira Ayuso { 1176d3519cb8SPablo Neira Ayuso return family == NFPROTO_NETDEV || 1177d3519cb8SPablo Neira Ayuso (family == NFPROTO_INET && hooknum == NF_INET_INGRESS); 1178d3519cb8SPablo Neira Ayuso } 1179d3519cb8SPablo Neira Ayuso 1180cc07eeb0SPablo Neira Ayuso void nft_register_chain_type(const struct nft_chain_type *); 118132537e91SPablo Neira Ayuso void nft_unregister_chain_type(const struct nft_chain_type *); 118296518518SPatrick McHardy 11835eccdfaaSJoe Perches int nft_register_expr(struct nft_expr_type *); 11845eccdfaaSJoe Perches void nft_unregister_expr(struct nft_expr_type *); 118596518518SPatrick McHardy 118633d5a7b1SFlorian Westphal int nft_verdict_dump(struct sk_buff *skb, int type, 118733d5a7b1SFlorian Westphal const struct nft_verdict *v); 118833d5a7b1SFlorian Westphal 118933d5a7b1SFlorian Westphal /** 1190d152159bSFlorian Westphal * struct nft_object_hash_key - key to lookup nft_object 1191d152159bSFlorian Westphal * 1192d152159bSFlorian Westphal * @name: name of the stateful object to look up 1193d152159bSFlorian Westphal * @table: table the object belongs to 1194d152159bSFlorian Westphal */ 1195d152159bSFlorian Westphal struct nft_object_hash_key { 1196d152159bSFlorian Westphal const char *name; 1197d152159bSFlorian Westphal const struct nft_table *table; 1198d152159bSFlorian Westphal }; 1199d152159bSFlorian Westphal 1200d152159bSFlorian Westphal /** 1201e5009240SPablo Neira Ayuso * struct nft_object - nf_tables stateful object 1202e5009240SPablo Neira Ayuso * 1203e5009240SPablo Neira Ayuso * @list: table stateful object list node 1204d152159bSFlorian Westphal * @key: keys that identify this object 12054d44175aSFlorian Westphal * @rhlhead: nft_objname_ht node 1206e5009240SPablo Neira Ayuso * @genmask: generation mask 1207e5009240SPablo Neira Ayuso * @use: number of references to this stateful object 12083ecbfd65SHarsha Sharma * @handle: unique object handle 1209dfc46034SPablo M. Bermudo Garay * @ops: object operations 12103ecbfd65SHarsha Sharma * @data: object data, layout depends on type 1211e5009240SPablo Neira Ayuso */ 1212e5009240SPablo Neira Ayuso struct nft_object { 1213e5009240SPablo Neira Ayuso struct list_head list; 12144d44175aSFlorian Westphal struct rhlist_head rhlhead; 1215d152159bSFlorian Westphal struct nft_object_hash_key key; 1216e5009240SPablo Neira Ayuso u32 genmask:2, 1217e5009240SPablo Neira Ayuso use:30; 12183ecbfd65SHarsha Sharma u64 handle; 1219b131c964SJose M. Guisado Gomez u16 udlen; 1220b131c964SJose M. Guisado Gomez u8 *udata; 1221e5009240SPablo Neira Ayuso /* runtime data below here */ 1222dfc46034SPablo M. Bermudo Garay const struct nft_object_ops *ops ____cacheline_aligned; 1223e5009240SPablo Neira Ayuso unsigned char data[] 1224e5009240SPablo Neira Ayuso __attribute__((aligned(__alignof__(u64)))); 1225e5009240SPablo Neira Ayuso }; 1226e5009240SPablo Neira Ayuso 1227e5009240SPablo Neira Ayuso static inline void *nft_obj_data(const struct nft_object *obj) 1228e5009240SPablo Neira Ayuso { 1229e5009240SPablo Neira Ayuso return (void *)obj->data; 1230e5009240SPablo Neira Ayuso } 1231e5009240SPablo Neira Ayuso 1232e5009240SPablo Neira Ayuso #define nft_expr_obj(expr) *((struct nft_object **)nft_expr_priv(expr)) 1233e5009240SPablo Neira Ayuso 12344d44175aSFlorian Westphal struct nft_object *nft_obj_lookup(const struct net *net, 12354d44175aSFlorian Westphal const struct nft_table *table, 1236e5009240SPablo Neira Ayuso const struct nlattr *nla, u32 objtype, 1237e5009240SPablo Neira Ayuso u8 genmask); 1238e5009240SPablo Neira Ayuso 1239d152159bSFlorian Westphal void nft_obj_notify(struct net *net, const struct nft_table *table, 12402599e989SPablo Neira Ayuso struct nft_object *obj, u32 portid, u32 seq, 12416fb721cfSPablo Neira Ayuso int event, u16 flags, int family, int report, gfp_t gfp); 12422599e989SPablo Neira Ayuso 1243e5009240SPablo Neira Ayuso /** 1244e5009240SPablo Neira Ayuso * struct nft_object_type - stateful object type 1245e5009240SPablo Neira Ayuso * 1246dfc46034SPablo M. Bermudo Garay * @select_ops: function to select nft_object_ops 1247dfc46034SPablo M. Bermudo Garay * @ops: default ops, used when no select_ops functions is present 1248e5009240SPablo Neira Ayuso * @list: list node in list of object types 1249e5009240SPablo Neira Ayuso * @type: stateful object numeric type 1250e5009240SPablo Neira Ayuso * @owner: module owner 1251e5009240SPablo Neira Ayuso * @maxattr: maximum netlink attribute 1252e5009240SPablo Neira Ayuso * @policy: netlink attribute policy 1253dfc46034SPablo M. Bermudo Garay */ 1254dfc46034SPablo M. Bermudo Garay struct nft_object_type { 1255dfc46034SPablo M. Bermudo Garay const struct nft_object_ops *(*select_ops)(const struct nft_ctx *, 1256dfc46034SPablo M. Bermudo Garay const struct nlattr * const tb[]); 1257dfc46034SPablo M. Bermudo Garay const struct nft_object_ops *ops; 1258dfc46034SPablo M. Bermudo Garay struct list_head list; 1259dfc46034SPablo M. Bermudo Garay u32 type; 1260dfc46034SPablo M. Bermudo Garay unsigned int maxattr; 1261dfc46034SPablo M. Bermudo Garay struct module *owner; 1262dfc46034SPablo M. Bermudo Garay const struct nla_policy *policy; 1263dfc46034SPablo M. Bermudo Garay }; 1264dfc46034SPablo M. Bermudo Garay 1265dfc46034SPablo M. Bermudo Garay /** 1266dfc46034SPablo M. Bermudo Garay * struct nft_object_ops - stateful object operations 1267dfc46034SPablo M. Bermudo Garay * 1268dfc46034SPablo M. Bermudo Garay * @eval: stateful object evaluation function 1269dfc46034SPablo M. Bermudo Garay * @size: stateful object size 1270e5009240SPablo Neira Ayuso * @init: initialize object from netlink attributes 1271e5009240SPablo Neira Ayuso * @destroy: release existing stateful object 1272e5009240SPablo Neira Ayuso * @dump: netlink dump stateful object 1273d62d0ba9SFernando Fernandez Mancera * @update: update stateful object 1274e5009240SPablo Neira Ayuso */ 1275dfc46034SPablo M. Bermudo Garay struct nft_object_ops { 1276e5009240SPablo Neira Ayuso void (*eval)(struct nft_object *obj, 1277e5009240SPablo Neira Ayuso struct nft_regs *regs, 1278e5009240SPablo Neira Ayuso const struct nft_pktinfo *pkt); 1279e5009240SPablo Neira Ayuso unsigned int size; 128084fba055SFlorian Westphal int (*init)(const struct nft_ctx *ctx, 128184fba055SFlorian Westphal const struct nlattr *const tb[], 1282e5009240SPablo Neira Ayuso struct nft_object *obj); 128300bfb320SPablo Neira Ayuso void (*destroy)(const struct nft_ctx *ctx, 128400bfb320SPablo Neira Ayuso struct nft_object *obj); 1285e5009240SPablo Neira Ayuso int (*dump)(struct sk_buff *skb, 128643da04a5SPablo Neira Ayuso struct nft_object *obj, 128743da04a5SPablo Neira Ayuso bool reset); 1288d62d0ba9SFernando Fernandez Mancera void (*update)(struct nft_object *obj, 1289d62d0ba9SFernando Fernandez Mancera struct nft_object *newobj); 1290dfc46034SPablo M. Bermudo Garay const struct nft_object_type *type; 1291e5009240SPablo Neira Ayuso }; 1292e5009240SPablo Neira Ayuso 1293e5009240SPablo Neira Ayuso int nft_register_obj(struct nft_object_type *obj_type); 1294e5009240SPablo Neira Ayuso void nft_unregister_obj(struct nft_object_type *obj_type); 1295e5009240SPablo Neira Ayuso 1296cb662ac6SPablo Neira Ayuso #define NFT_NETDEVICE_MAX 256 1297d92191aaSPablo Neira Ayuso 1298e5009240SPablo Neira Ayuso /** 12993b49e2e9SPablo Neira Ayuso * struct nft_flowtable - nf_tables flow table 13003b49e2e9SPablo Neira Ayuso * 13013b49e2e9SPablo Neira Ayuso * @list: flow table list node in table list 13023b49e2e9SPablo Neira Ayuso * @table: the table the flow table is contained in 13033b49e2e9SPablo Neira Ayuso * @name: name of this flow table 13043b49e2e9SPablo Neira Ayuso * @hooknum: hook number 13053b49e2e9SPablo Neira Ayuso * @ops_len: number of hooks in array 13063b49e2e9SPablo Neira Ayuso * @genmask: generation mask 13073b49e2e9SPablo Neira Ayuso * @use: number of references to this flow table 13083ecbfd65SHarsha Sharma * @handle: unique object handle 1309d92191aaSPablo Neira Ayuso * @dev_name: array of device names 13103b49e2e9SPablo Neira Ayuso * @data: rhashtable and garbage collector 13113b49e2e9SPablo Neira Ayuso * @ops: array of hooks 13123b49e2e9SPablo Neira Ayuso */ 13133b49e2e9SPablo Neira Ayuso struct nft_flowtable { 13143b49e2e9SPablo Neira Ayuso struct list_head list; 13153b49e2e9SPablo Neira Ayuso struct nft_table *table; 13163b49e2e9SPablo Neira Ayuso char *name; 13173b49e2e9SPablo Neira Ayuso int hooknum; 13183b49e2e9SPablo Neira Ayuso int ops_len; 13193b49e2e9SPablo Neira Ayuso u32 genmask:2, 13203b49e2e9SPablo Neira Ayuso use:30; 13213ecbfd65SHarsha Sharma u64 handle; 13223b49e2e9SPablo Neira Ayuso /* runtime data below here */ 13233f0465a9SPablo Neira Ayuso struct list_head hook_list ____cacheline_aligned; 13243b49e2e9SPablo Neira Ayuso struct nf_flowtable data; 13253b49e2e9SPablo Neira Ayuso }; 13263b49e2e9SPablo Neira Ayuso 1327cac20fcdSPablo Neira Ayuso struct nft_flowtable *nft_flowtable_lookup(const struct nft_table *table, 13283b49e2e9SPablo Neira Ayuso const struct nlattr *nla, 13293b49e2e9SPablo Neira Ayuso u8 genmask); 13303b49e2e9SPablo Neira Ayuso 13319b05b6e1SLaura Garcia Liebana void nf_tables_deactivate_flowtable(const struct nft_ctx *ctx, 13329b05b6e1SLaura Garcia Liebana struct nft_flowtable *flowtable, 13339b05b6e1SLaura Garcia Liebana enum nft_trans_phase phase); 13349b05b6e1SLaura Garcia Liebana 13353b49e2e9SPablo Neira Ayuso void nft_register_flowtable_type(struct nf_flowtable_type *type); 13363b49e2e9SPablo Neira Ayuso void nft_unregister_flowtable_type(struct nf_flowtable_type *type); 13373b49e2e9SPablo Neira Ayuso 13383b49e2e9SPablo Neira Ayuso /** 133933d5a7b1SFlorian Westphal * struct nft_traceinfo - nft tracing information and state 134033d5a7b1SFlorian Westphal * 134133d5a7b1SFlorian Westphal * @pkt: pktinfo currently processed 134233d5a7b1SFlorian Westphal * @basechain: base chain currently processed 134333d5a7b1SFlorian Westphal * @chain: chain currently processed 134433d5a7b1SFlorian Westphal * @rule: rule that was evaluated 134533d5a7b1SFlorian Westphal * @verdict: verdict given by rule 134633d5a7b1SFlorian Westphal * @type: event type (enum nft_trace_types) 134733d5a7b1SFlorian Westphal * @packet_dumped: packet headers sent in a previous traceinfo message 134833d5a7b1SFlorian Westphal * @trace: other struct members are initialised 134933d5a7b1SFlorian Westphal */ 135033d5a7b1SFlorian Westphal struct nft_traceinfo { 135133d5a7b1SFlorian Westphal const struct nft_pktinfo *pkt; 135233d5a7b1SFlorian Westphal const struct nft_base_chain *basechain; 135333d5a7b1SFlorian Westphal const struct nft_chain *chain; 13542c865a8aSPablo Neira Ayuso const struct nft_rule_dp *rule; 135533d5a7b1SFlorian Westphal const struct nft_verdict *verdict; 135633d5a7b1SFlorian Westphal enum nft_trace_types type; 135733d5a7b1SFlorian Westphal bool packet_dumped; 135833d5a7b1SFlorian Westphal bool trace; 135933d5a7b1SFlorian Westphal }; 136033d5a7b1SFlorian Westphal 136133d5a7b1SFlorian Westphal void nft_trace_init(struct nft_traceinfo *info, const struct nft_pktinfo *pkt, 136233d5a7b1SFlorian Westphal const struct nft_verdict *verdict, 136333d5a7b1SFlorian Westphal const struct nft_chain *basechain); 136433d5a7b1SFlorian Westphal 136533d5a7b1SFlorian Westphal void nft_trace_notify(struct nft_traceinfo *info); 136633d5a7b1SFlorian Westphal 13679370761cSPablo Neira Ayuso #define MODULE_ALIAS_NFT_CHAIN(family, name) \ 13689370761cSPablo Neira Ayuso MODULE_ALIAS("nft-chain-" __stringify(family) "-" name) 136996518518SPatrick McHardy 137064d46806SPatrick McHardy #define MODULE_ALIAS_NFT_AF_EXPR(family, name) \ 137164d46806SPatrick McHardy MODULE_ALIAS("nft-expr-" __stringify(family) "-" name) 137264d46806SPatrick McHardy 137396518518SPatrick McHardy #define MODULE_ALIAS_NFT_EXPR(name) \ 137496518518SPatrick McHardy MODULE_ALIAS("nft-expr-" name) 137596518518SPatrick McHardy 1376e5009240SPablo Neira Ayuso #define MODULE_ALIAS_NFT_OBJ(type) \ 1377e5009240SPablo Neira Ayuso MODULE_ALIAS("nft-obj-" __stringify(type)) 1378e5009240SPablo Neira Ayuso 137947e640afSJeremy Sowden #if IS_ENABLED(CONFIG_NF_TABLES) 138047e640afSJeremy Sowden 1381ea4bd995SPatrick McHardy /* 1382ea4bd995SPatrick McHardy * The gencursor defines two generations, the currently active and the 1383ea4bd995SPatrick McHardy * next one. Objects contain a bitmask of 2 bits specifying the generations 1384ea4bd995SPatrick McHardy * they're active in. A set bit means they're inactive in the generation 1385ea4bd995SPatrick McHardy * represented by that bit. 1386ea4bd995SPatrick McHardy * 1387ea4bd995SPatrick McHardy * New objects start out as inactive in the current and active in the 1388ea4bd995SPatrick McHardy * next generation. When committing the ruleset the bitmask is cleared, 1389ea4bd995SPatrick McHardy * meaning they're active in all generations. When removing an object, 1390ea4bd995SPatrick McHardy * it is set inactive in the next generation. After committing the ruleset, 1391ea4bd995SPatrick McHardy * the objects are removed. 1392ea4bd995SPatrick McHardy */ 1393ea4bd995SPatrick McHardy static inline unsigned int nft_gencursor_next(const struct net *net) 1394ea4bd995SPatrick McHardy { 1395ea4bd995SPatrick McHardy return net->nft.gencursor + 1 == 1 ? 1 : 0; 1396ea4bd995SPatrick McHardy } 1397ea4bd995SPatrick McHardy 1398ea4bd995SPatrick McHardy static inline u8 nft_genmask_next(const struct net *net) 1399ea4bd995SPatrick McHardy { 1400ea4bd995SPatrick McHardy return 1 << nft_gencursor_next(net); 1401ea4bd995SPatrick McHardy } 1402ea4bd995SPatrick McHardy 1403ea4bd995SPatrick McHardy static inline u8 nft_genmask_cur(const struct net *net) 1404ea4bd995SPatrick McHardy { 140514cd5d4aSMark Rutland /* Use READ_ONCE() to prevent refetching the value for atomicity */ 140614cd5d4aSMark Rutland return 1 << READ_ONCE(net->nft.gencursor); 1407ea4bd995SPatrick McHardy } 1408ea4bd995SPatrick McHardy 140922fe54d5SPatrick McHardy #define NFT_GENMASK_ANY ((1 << 0) | (1 << 1)) 141022fe54d5SPatrick McHardy 1411cc02e457SPatrick McHardy /* 1412889f7ee7SPablo Neira Ayuso * Generic transaction helpers 1413889f7ee7SPablo Neira Ayuso */ 1414889f7ee7SPablo Neira Ayuso 1415889f7ee7SPablo Neira Ayuso /* Check if this object is currently active. */ 1416889f7ee7SPablo Neira Ayuso #define nft_is_active(__net, __obj) \ 1417889f7ee7SPablo Neira Ayuso (((__obj)->genmask & nft_genmask_cur(__net)) == 0) 1418889f7ee7SPablo Neira Ayuso 1419889f7ee7SPablo Neira Ayuso /* Check if this object is active in the next generation. */ 1420889f7ee7SPablo Neira Ayuso #define nft_is_active_next(__net, __obj) \ 1421889f7ee7SPablo Neira Ayuso (((__obj)->genmask & nft_genmask_next(__net)) == 0) 1422889f7ee7SPablo Neira Ayuso 1423889f7ee7SPablo Neira Ayuso /* This object becomes active in the next generation. */ 1424889f7ee7SPablo Neira Ayuso #define nft_activate_next(__net, __obj) \ 1425889f7ee7SPablo Neira Ayuso (__obj)->genmask = nft_genmask_cur(__net) 1426889f7ee7SPablo Neira Ayuso 1427889f7ee7SPablo Neira Ayuso /* This object becomes inactive in the next generation. */ 1428889f7ee7SPablo Neira Ayuso #define nft_deactivate_next(__net, __obj) \ 1429889f7ee7SPablo Neira Ayuso (__obj)->genmask = nft_genmask_next(__net) 1430889f7ee7SPablo Neira Ayuso 1431889f7ee7SPablo Neira Ayuso /* After committing the ruleset, clear the stale generation bit. */ 1432889f7ee7SPablo Neira Ayuso #define nft_clear(__net, __obj) \ 1433889f7ee7SPablo Neira Ayuso (__obj)->genmask &= ~nft_genmask_next(__net) 1434f2a6d766SPablo Neira Ayuso #define nft_active_genmask(__obj, __genmask) \ 1435f2a6d766SPablo Neira Ayuso !((__obj)->genmask & __genmask) 1436889f7ee7SPablo Neira Ayuso 1437889f7ee7SPablo Neira Ayuso /* 1438cc02e457SPatrick McHardy * Set element transaction helpers 1439cc02e457SPatrick McHardy */ 1440cc02e457SPatrick McHardy 1441cc02e457SPatrick McHardy static inline bool nft_set_elem_active(const struct nft_set_ext *ext, 1442cc02e457SPatrick McHardy u8 genmask) 1443cc02e457SPatrick McHardy { 1444cc02e457SPatrick McHardy return !(ext->genmask & genmask); 1445cc02e457SPatrick McHardy } 1446cc02e457SPatrick McHardy 144742a55769SPablo Neira Ayuso static inline void nft_set_elem_change_active(const struct net *net, 144842a55769SPablo Neira Ayuso const struct nft_set *set, 1449cc02e457SPatrick McHardy struct nft_set_ext *ext) 1450cc02e457SPatrick McHardy { 145142a55769SPablo Neira Ayuso ext->genmask ^= nft_genmask_next(net); 1452cc02e457SPatrick McHardy } 1453cc02e457SPatrick McHardy 145447e640afSJeremy Sowden #endif /* IS_ENABLED(CONFIG_NF_TABLES) */ 145547e640afSJeremy Sowden 145669086658SPatrick McHardy /* 145769086658SPatrick McHardy * We use a free bit in the genmask field to indicate the element 145869086658SPatrick McHardy * is busy, meaning it is currently being processed either by 145969086658SPatrick McHardy * the netlink API or GC. 146069086658SPatrick McHardy * 146169086658SPatrick McHardy * Even though the genmask is only a single byte wide, this works 146269086658SPatrick McHardy * because the extension structure if fully constant once initialized, 146369086658SPatrick McHardy * so there are no non-atomic write accesses unless it is already 146469086658SPatrick McHardy * marked busy. 146569086658SPatrick McHardy */ 146669086658SPatrick McHardy #define NFT_SET_ELEM_BUSY_MASK (1 << 2) 146769086658SPatrick McHardy 146869086658SPatrick McHardy #if defined(__LITTLE_ENDIAN_BITFIELD) 146969086658SPatrick McHardy #define NFT_SET_ELEM_BUSY_BIT 2 147069086658SPatrick McHardy #elif defined(__BIG_ENDIAN_BITFIELD) 147169086658SPatrick McHardy #define NFT_SET_ELEM_BUSY_BIT (BITS_PER_LONG - BITS_PER_BYTE + 2) 147269086658SPatrick McHardy #else 147369086658SPatrick McHardy #error 147469086658SPatrick McHardy #endif 147569086658SPatrick McHardy 147669086658SPatrick McHardy static inline int nft_set_elem_mark_busy(struct nft_set_ext *ext) 147769086658SPatrick McHardy { 147869086658SPatrick McHardy unsigned long *word = (unsigned long *)ext; 147969086658SPatrick McHardy 148069086658SPatrick McHardy BUILD_BUG_ON(offsetof(struct nft_set_ext, genmask) != 0); 148169086658SPatrick McHardy return test_and_set_bit(NFT_SET_ELEM_BUSY_BIT, word); 148269086658SPatrick McHardy } 148369086658SPatrick McHardy 148469086658SPatrick McHardy static inline void nft_set_elem_clear_busy(struct nft_set_ext *ext) 148569086658SPatrick McHardy { 148669086658SPatrick McHardy unsigned long *word = (unsigned long *)ext; 148769086658SPatrick McHardy 148869086658SPatrick McHardy clear_bit(NFT_SET_ELEM_BUSY_BIT, word); 148969086658SPatrick McHardy } 149069086658SPatrick McHardy 14911a1e1a12SPatrick McHardy /** 14921a1e1a12SPatrick McHardy * struct nft_trans - nf_tables object update in transaction 14931a1e1a12SPatrick McHardy * 14941a1e1a12SPatrick McHardy * @list: used internally 14951a1e1a12SPatrick McHardy * @msg_type: message type 14960935d558SFlorian Westphal * @put_net: ctx->net needs to be put 14971a1e1a12SPatrick McHardy * @ctx: transaction context 14981a1e1a12SPatrick McHardy * @data: internal information related to the transaction 14991a1e1a12SPatrick McHardy */ 15001a1e1a12SPatrick McHardy struct nft_trans { 15011a1e1a12SPatrick McHardy struct list_head list; 15021a1e1a12SPatrick McHardy int msg_type; 15030935d558SFlorian Westphal bool put_net; 15041a1e1a12SPatrick McHardy struct nft_ctx ctx; 15056daf1414SGustavo A. R. Silva char data[]; 15061a1e1a12SPatrick McHardy }; 15071a1e1a12SPatrick McHardy 15081a1e1a12SPatrick McHardy struct nft_trans_rule { 15091a1e1a12SPatrick McHardy struct nft_rule *rule; 1510c9626a2cSPablo Neira Ayuso struct nft_flow_rule *flow; 15111a94e38dSPablo Neira Ayuso u32 rule_id; 15121a1e1a12SPatrick McHardy }; 15131a1e1a12SPatrick McHardy 15141a1e1a12SPatrick McHardy #define nft_trans_rule(trans) \ 15151a1e1a12SPatrick McHardy (((struct nft_trans_rule *)trans->data)->rule) 1516c9626a2cSPablo Neira Ayuso #define nft_trans_flow_rule(trans) \ 1517c9626a2cSPablo Neira Ayuso (((struct nft_trans_rule *)trans->data)->flow) 15181a94e38dSPablo Neira Ayuso #define nft_trans_rule_id(trans) \ 15191a94e38dSPablo Neira Ayuso (((struct nft_trans_rule *)trans->data)->rule_id) 15201a1e1a12SPatrick McHardy 15211a1e1a12SPatrick McHardy struct nft_trans_set { 15221a1e1a12SPatrick McHardy struct nft_set *set; 15231a1e1a12SPatrick McHardy u32 set_id; 15246a0a8d10SPablo Neira Ayuso bool bound; 15251a1e1a12SPatrick McHardy }; 15261a1e1a12SPatrick McHardy 15271a1e1a12SPatrick McHardy #define nft_trans_set(trans) \ 15281a1e1a12SPatrick McHardy (((struct nft_trans_set *)trans->data)->set) 15291a1e1a12SPatrick McHardy #define nft_trans_set_id(trans) \ 15301a1e1a12SPatrick McHardy (((struct nft_trans_set *)trans->data)->set_id) 15316a0a8d10SPablo Neira Ayuso #define nft_trans_set_bound(trans) \ 15326a0a8d10SPablo Neira Ayuso (((struct nft_trans_set *)trans->data)->bound) 15331a1e1a12SPatrick McHardy 15341a1e1a12SPatrick McHardy struct nft_trans_chain { 15351a1e1a12SPatrick McHardy bool update; 1536b7263e07SPhil Sutter char *name; 15371a1e1a12SPatrick McHardy struct nft_stats __percpu *stats; 15381a1e1a12SPatrick McHardy u8 policy; 153974cccc3dSPablo Neira Ayuso u32 chain_id; 15401a1e1a12SPatrick McHardy }; 15411a1e1a12SPatrick McHardy 15421a1e1a12SPatrick McHardy #define nft_trans_chain_update(trans) \ 15431a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->update) 15441a1e1a12SPatrick McHardy #define nft_trans_chain_name(trans) \ 15451a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->name) 15461a1e1a12SPatrick McHardy #define nft_trans_chain_stats(trans) \ 15471a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->stats) 15481a1e1a12SPatrick McHardy #define nft_trans_chain_policy(trans) \ 15491a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->policy) 155074cccc3dSPablo Neira Ayuso #define nft_trans_chain_id(trans) \ 155174cccc3dSPablo Neira Ayuso (((struct nft_trans_chain *)trans->data)->chain_id) 15521a1e1a12SPatrick McHardy 15531a1e1a12SPatrick McHardy struct nft_trans_table { 15541a1e1a12SPatrick McHardy bool update; 15551a1e1a12SPatrick McHardy }; 15561a1e1a12SPatrick McHardy 15571a1e1a12SPatrick McHardy #define nft_trans_table_update(trans) \ 15581a1e1a12SPatrick McHardy (((struct nft_trans_table *)trans->data)->update) 15591a1e1a12SPatrick McHardy 15601a1e1a12SPatrick McHardy struct nft_trans_elem { 15611a1e1a12SPatrick McHardy struct nft_set *set; 15621a1e1a12SPatrick McHardy struct nft_set_elem elem; 15636a0a8d10SPablo Neira Ayuso bool bound; 15641a1e1a12SPatrick McHardy }; 15651a1e1a12SPatrick McHardy 15661a1e1a12SPatrick McHardy #define nft_trans_elem_set(trans) \ 15671a1e1a12SPatrick McHardy (((struct nft_trans_elem *)trans->data)->set) 15681a1e1a12SPatrick McHardy #define nft_trans_elem(trans) \ 15691a1e1a12SPatrick McHardy (((struct nft_trans_elem *)trans->data)->elem) 15706a0a8d10SPablo Neira Ayuso #define nft_trans_elem_set_bound(trans) \ 15716a0a8d10SPablo Neira Ayuso (((struct nft_trans_elem *)trans->data)->bound) 15721a1e1a12SPatrick McHardy 1573e5009240SPablo Neira Ayuso struct nft_trans_obj { 1574e5009240SPablo Neira Ayuso struct nft_object *obj; 1575d62d0ba9SFernando Fernandez Mancera struct nft_object *newobj; 1576d62d0ba9SFernando Fernandez Mancera bool update; 1577e5009240SPablo Neira Ayuso }; 1578e5009240SPablo Neira Ayuso 1579e5009240SPablo Neira Ayuso #define nft_trans_obj(trans) \ 1580e5009240SPablo Neira Ayuso (((struct nft_trans_obj *)trans->data)->obj) 1581d62d0ba9SFernando Fernandez Mancera #define nft_trans_obj_newobj(trans) \ 1582d62d0ba9SFernando Fernandez Mancera (((struct nft_trans_obj *)trans->data)->newobj) 1583d62d0ba9SFernando Fernandez Mancera #define nft_trans_obj_update(trans) \ 1584d62d0ba9SFernando Fernandez Mancera (((struct nft_trans_obj *)trans->data)->update) 1585e5009240SPablo Neira Ayuso 15863b49e2e9SPablo Neira Ayuso struct nft_trans_flowtable { 15873b49e2e9SPablo Neira Ayuso struct nft_flowtable *flowtable; 158878d9f48fSPablo Neira Ayuso bool update; 158978d9f48fSPablo Neira Ayuso struct list_head hook_list; 15907b35582cSPablo Neira Ayuso u32 flags; 15913b49e2e9SPablo Neira Ayuso }; 15923b49e2e9SPablo Neira Ayuso 15933b49e2e9SPablo Neira Ayuso #define nft_trans_flowtable(trans) \ 15943b49e2e9SPablo Neira Ayuso (((struct nft_trans_flowtable *)trans->data)->flowtable) 159578d9f48fSPablo Neira Ayuso #define nft_trans_flowtable_update(trans) \ 159678d9f48fSPablo Neira Ayuso (((struct nft_trans_flowtable *)trans->data)->update) 159778d9f48fSPablo Neira Ayuso #define nft_trans_flowtable_hooks(trans) \ 159878d9f48fSPablo Neira Ayuso (((struct nft_trans_flowtable *)trans->data)->hook_list) 15997b35582cSPablo Neira Ayuso #define nft_trans_flowtable_flags(trans) \ 16007b35582cSPablo Neira Ayuso (((struct nft_trans_flowtable *)trans->data)->flags) 16013b49e2e9SPablo Neira Ayuso 160202c7b25eSPablo Neira Ayuso int __init nft_chain_filter_init(void); 1603d209df3eSFlorian Westphal void nft_chain_filter_fini(void); 160402c7b25eSPablo Neira Ayuso 1605c1deb065SFlorian Westphal void __init nft_chain_route_init(void); 1606c1deb065SFlorian Westphal void nft_chain_route_fini(void); 1607ffe8923fSFlorian Westphal 1608ffe8923fSFlorian Westphal void nf_tables_trans_destroy_flush_work(void); 1609917d80d3SPablo Neira Ayuso 1610917d80d3SPablo Neira Ayuso int nf_msecs_to_jiffies64(const struct nlattr *nla, u64 *result); 1611917d80d3SPablo Neira Ayuso __be64 nf_jiffies64_to_msecs(u64 input); 1612917d80d3SPablo Neira Ayuso 1613cefa31a9SFlorian Westphal #ifdef CONFIG_MODULES 1614cefa31a9SFlorian Westphal __printf(2, 3) int nft_request_module(struct net *net, const char *fmt, ...); 1615cefa31a9SFlorian Westphal #else 1616cefa31a9SFlorian Westphal static inline int nft_request_module(struct net *net, const char *fmt, ...) { return -ENOENT; } 1617cefa31a9SFlorian Westphal #endif 16180854db2aSFlorian Westphal 16190854db2aSFlorian Westphal struct nftables_pernet { 16200854db2aSFlorian Westphal struct list_head tables; 16210854db2aSFlorian Westphal struct list_head commit_list; 16220854db2aSFlorian Westphal struct list_head module_list; 16230854db2aSFlorian Westphal struct list_head notify_list; 16240854db2aSFlorian Westphal struct mutex commit_mutex; 16250854db2aSFlorian Westphal unsigned int base_seq; 16260854db2aSFlorian Westphal u8 validate_state; 16270854db2aSFlorian Westphal }; 16280854db2aSFlorian Westphal 1629d59d2f82SPablo Neira Ayuso extern unsigned int nf_tables_net_id; 1630d59d2f82SPablo Neira Ayuso 1631d59d2f82SPablo Neira Ayuso static inline struct nftables_pernet *nft_pernet(const struct net *net) 1632d59d2f82SPablo Neira Ayuso { 1633d59d2f82SPablo Neira Ayuso return net_generic(net, nf_tables_net_id); 1634d59d2f82SPablo Neira Ayuso } 1635d59d2f82SPablo Neira Ayuso 163696518518SPatrick McHardy #endif /* _NET_NF_TABLES_H */ 1637