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 2496518518SPatrick McHardy struct nft_pktinfo { 2596518518SPatrick McHardy struct sk_buff *skb; 26*897389deSFlorian Westphal const struct nf_hook_state *state; 27beac5afaSPablo Neira Ayuso bool tprot_set; 284566bf27SPatrick McHardy u8 tprot; 29*897389deSFlorian Westphal u16 fragoff; 30*897389deSFlorian Westphal unsigned int thoff; 3196518518SPatrick McHardy }; 3296518518SPatrick McHardy 3385554eb9SFlorian Westphal static inline struct sock *nft_sk(const struct nft_pktinfo *pkt) 3485554eb9SFlorian Westphal { 35*897389deSFlorian Westphal return pkt->state->sk; 3685554eb9SFlorian Westphal } 3785554eb9SFlorian Westphal 382d7b4aceSFlorian Westphal static inline unsigned int nft_thoff(const struct nft_pktinfo *pkt) 392d7b4aceSFlorian Westphal { 40*897389deSFlorian Westphal return pkt->thoff; 412d7b4aceSFlorian Westphal } 422d7b4aceSFlorian Westphal 430e5a1c7eSPablo Neira Ayuso static inline struct net *nft_net(const struct nft_pktinfo *pkt) 440e5a1c7eSPablo Neira Ayuso { 45*897389deSFlorian Westphal return pkt->state->net; 460e5a1c7eSPablo Neira Ayuso } 470e5a1c7eSPablo Neira Ayuso 480e5a1c7eSPablo Neira Ayuso static inline unsigned int nft_hook(const struct nft_pktinfo *pkt) 490e5a1c7eSPablo Neira Ayuso { 50*897389deSFlorian Westphal return pkt->state->hook; 510e5a1c7eSPablo Neira Ayuso } 520e5a1c7eSPablo Neira Ayuso 530e5a1c7eSPablo Neira Ayuso static inline u8 nft_pf(const struct nft_pktinfo *pkt) 540e5a1c7eSPablo Neira Ayuso { 55*897389deSFlorian Westphal return pkt->state->pf; 560e5a1c7eSPablo Neira Ayuso } 570e5a1c7eSPablo Neira Ayuso 580e5a1c7eSPablo Neira Ayuso static inline const struct net_device *nft_in(const struct nft_pktinfo *pkt) 590e5a1c7eSPablo Neira Ayuso { 60*897389deSFlorian Westphal return pkt->state->in; 610e5a1c7eSPablo Neira Ayuso } 620e5a1c7eSPablo Neira Ayuso 630e5a1c7eSPablo Neira Ayuso static inline const struct net_device *nft_out(const struct nft_pktinfo *pkt) 640e5a1c7eSPablo Neira Ayuso { 65*897389deSFlorian Westphal return pkt->state->out; 660e5a1c7eSPablo Neira Ayuso } 670e5a1c7eSPablo Neira Ayuso 680ca743a5SPablo Neira Ayuso static inline void nft_set_pktinfo(struct nft_pktinfo *pkt, 690ca743a5SPablo Neira Ayuso struct sk_buff *skb, 70073bfd56SDavid S. Miller const struct nf_hook_state *state) 710ca743a5SPablo Neira Ayuso { 720ca743a5SPablo Neira Ayuso pkt->skb = skb; 73*897389deSFlorian Westphal pkt->state = state; 740ca743a5SPablo Neira Ayuso } 750ca743a5SPablo Neira Ayuso 76f06ad944SFlorian Westphal static inline void nft_set_pktinfo_unspec(struct nft_pktinfo *pkt) 77beac5afaSPablo Neira Ayuso { 78beac5afaSPablo Neira Ayuso pkt->tprot_set = false; 79beac5afaSPablo Neira Ayuso pkt->tprot = 0; 80*897389deSFlorian Westphal pkt->thoff = 0; 81*897389deSFlorian Westphal pkt->fragoff = 0; 82beac5afaSPablo Neira Ayuso } 83beac5afaSPablo Neira Ayuso 84a55e22e9SPatrick McHardy /** 85a55e22e9SPatrick McHardy * struct nft_verdict - nf_tables verdict 86a55e22e9SPatrick McHardy * 87a55e22e9SPatrick McHardy * @code: nf_tables/netfilter verdict code 88a55e22e9SPatrick McHardy * @chain: destination chain for NFT_JUMP/NFT_GOTO 89a55e22e9SPatrick McHardy */ 90a55e22e9SPatrick McHardy struct nft_verdict { 91a55e22e9SPatrick McHardy u32 code; 92a55e22e9SPatrick McHardy struct nft_chain *chain; 93a55e22e9SPatrick McHardy }; 94a55e22e9SPatrick McHardy 9596518518SPatrick McHardy struct nft_data { 9696518518SPatrick McHardy union { 9796518518SPatrick McHardy u32 data[4]; 981ca2e170SPatrick McHardy struct nft_verdict verdict; 9996518518SPatrick McHardy }; 10096518518SPatrick McHardy } __attribute__((aligned(__alignof__(u64)))); 10196518518SPatrick McHardy 102a55e22e9SPatrick McHardy /** 103a55e22e9SPatrick McHardy * struct nft_regs - nf_tables register set 104a55e22e9SPatrick McHardy * 105a55e22e9SPatrick McHardy * @data: data registers 106a55e22e9SPatrick McHardy * @verdict: verdict register 107a55e22e9SPatrick McHardy * 108a55e22e9SPatrick McHardy * The first four data registers alias to the verdict register. 109a55e22e9SPatrick McHardy */ 110a55e22e9SPatrick McHardy struct nft_regs { 111a55e22e9SPatrick McHardy union { 11249499c3eSPatrick McHardy u32 data[20]; 113a55e22e9SPatrick McHardy struct nft_verdict verdict; 114a55e22e9SPatrick McHardy }; 115a55e22e9SPatrick McHardy }; 116a55e22e9SPatrick McHardy 117a1b840adSAnder Juaristi /* Store/load an u8, u16 or u64 integer to/from the u32 data register. 11810596608SLiping Zhang * 11910596608SLiping Zhang * Note, when using concatenations, register allocation happens at 32-bit 12010596608SLiping Zhang * level. So for store instruction, pad the rest part with zero to avoid 12110596608SLiping Zhang * garbage values. 12210596608SLiping Zhang */ 12310596608SLiping Zhang 12410596608SLiping Zhang static inline void nft_reg_store8(u32 *dreg, u8 val) 12510596608SLiping Zhang { 12610596608SLiping Zhang *dreg = 0; 12710596608SLiping Zhang *(u8 *)dreg = val; 12810596608SLiping Zhang } 12910596608SLiping Zhang 1307cd9a58dSPablo Neira Ayuso static inline u8 nft_reg_load8(const u32 *sreg) 131a1b840adSAnder Juaristi { 132a1b840adSAnder Juaristi return *(u8 *)sreg; 133a1b840adSAnder Juaristi } 134a1b840adSAnder Juaristi 135a1b840adSAnder Juaristi static inline void nft_reg_store16(u32 *dreg, u16 val) 136a1b840adSAnder Juaristi { 137a1b840adSAnder Juaristi *dreg = 0; 138a1b840adSAnder Juaristi *(u16 *)dreg = val; 139a1b840adSAnder Juaristi } 140a1b840adSAnder Juaristi 1417cd9a58dSPablo Neira Ayuso static inline u16 nft_reg_load16(const u32 *sreg) 14210596608SLiping Zhang { 14310596608SLiping Zhang return *(u16 *)sreg; 14410596608SLiping Zhang } 14510596608SLiping Zhang 146a1b840adSAnder Juaristi static inline void nft_reg_store64(u32 *dreg, u64 val) 14710596608SLiping Zhang { 148a1b840adSAnder Juaristi put_unaligned(val, (u64 *)dreg); 149a1b840adSAnder Juaristi } 150a1b840adSAnder Juaristi 1517cd9a58dSPablo Neira Ayuso static inline u64 nft_reg_load64(const u32 *sreg) 152a1b840adSAnder Juaristi { 153a1b840adSAnder Juaristi return get_unaligned((u64 *)sreg); 15410596608SLiping Zhang } 15510596608SLiping Zhang 15649499c3eSPatrick McHardy static inline void nft_data_copy(u32 *dst, const struct nft_data *src, 15749499c3eSPatrick McHardy unsigned int len) 15896518518SPatrick McHardy { 1591e105e6aSFlorian Westphal if (len % NFT_REG32_SIZE) 1601e105e6aSFlorian Westphal dst[len / NFT_REG32_SIZE] = 0; 16149499c3eSPatrick McHardy memcpy(dst, src, len); 16296518518SPatrick McHardy } 16396518518SPatrick McHardy 16496518518SPatrick McHardy /** 16520a69341SPatrick McHardy * struct nft_ctx - nf_tables rule/set context 16696518518SPatrick McHardy * 16799633ab2SPablo Neira Ayuso * @net: net namespace 16896518518SPatrick McHardy * @table: the table the chain is contained in 16996518518SPatrick McHardy * @chain: the chain the rule is contained in 1700ca743a5SPablo Neira Ayuso * @nla: netlink attributes 171128ad332SPablo Neira Ayuso * @portid: netlink portID of the original message 172128ad332SPablo Neira Ayuso * @seq: netlink sequence number 17336596dadSPablo Neira Ayuso * @family: protocol family 17426b2f552STaehee Yoo * @level: depth of the chains 175128ad332SPablo Neira Ayuso * @report: notify via unicast netlink message 17696518518SPatrick McHardy */ 17796518518SPatrick McHardy struct nft_ctx { 17899633ab2SPablo Neira Ayuso struct net *net; 1797c95f6d8SPablo Neira Ayuso struct nft_table *table; 1807c95f6d8SPablo Neira Ayuso struct nft_chain *chain; 1810ca743a5SPablo Neira Ayuso const struct nlattr * const *nla; 182128ad332SPablo Neira Ayuso u32 portid; 183128ad332SPablo Neira Ayuso u32 seq; 184c9626a2cSPablo Neira Ayuso u16 flags; 18536596dadSPablo Neira Ayuso u8 family; 18626b2f552STaehee Yoo u8 level; 187128ad332SPablo Neira Ayuso bool report; 18896518518SPatrick McHardy }; 18996518518SPatrick McHardy 19096518518SPatrick McHardy struct nft_data_desc { 19196518518SPatrick McHardy enum nft_data_types type; 19296518518SPatrick McHardy unsigned int len; 19396518518SPatrick McHardy }; 19496518518SPatrick McHardy 195d0a11fc3SPatrick McHardy int nft_data_init(const struct nft_ctx *ctx, 196d0a11fc3SPatrick McHardy struct nft_data *data, unsigned int size, 19796518518SPatrick McHardy struct nft_data_desc *desc, const struct nlattr *nla); 198bb7b40aeSPablo Neira Ayuso void nft_data_hold(const struct nft_data *data, enum nft_data_types type); 19959105446SPablo Neira Ayuso void nft_data_release(const struct nft_data *data, enum nft_data_types type); 2005eccdfaaSJoe Perches int nft_data_dump(struct sk_buff *skb, int attr, const struct nft_data *data, 20196518518SPatrick McHardy enum nft_data_types type, unsigned int len); 20296518518SPatrick McHardy 20396518518SPatrick McHardy static inline enum nft_data_types nft_dreg_to_type(enum nft_registers reg) 20496518518SPatrick McHardy { 20596518518SPatrick McHardy return reg == NFT_REG_VERDICT ? NFT_DATA_VERDICT : NFT_DATA_VALUE; 20696518518SPatrick McHardy } 20796518518SPatrick McHardy 20820a69341SPatrick McHardy static inline enum nft_registers nft_type_to_reg(enum nft_data_types type) 20920a69341SPatrick McHardy { 210bf798657SPablo Neira Ayuso return type == NFT_DATA_VERDICT ? NFT_REG_VERDICT : NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE; 21120a69341SPatrick McHardy } 21220a69341SPatrick McHardy 213f1d505bbSJohn W. Linville int nft_parse_u32_check(const struct nlattr *attr, int max, u32 *dest); 214b1c96ed3SPatrick McHardy int nft_dump_register(struct sk_buff *skb, unsigned int attr, unsigned int reg); 215b1c96ed3SPatrick McHardy 2164f16d25cSPablo Neira Ayuso int nft_parse_register_load(const struct nlattr *attr, u8 *sreg, u32 len); 217345023b0SPablo Neira Ayuso int nft_parse_register_store(const struct nft_ctx *ctx, 218345023b0SPablo Neira Ayuso const struct nlattr *attr, u8 *dreg, 21996518518SPatrick McHardy const struct nft_data *data, 22045d9bcdaSPatrick McHardy enum nft_data_types type, unsigned int len); 22196518518SPatrick McHardy 22286f1ec32SPatrick McHardy /** 22386f1ec32SPatrick McHardy * struct nft_userdata - user defined data associated with an object 22486f1ec32SPatrick McHardy * 22586f1ec32SPatrick McHardy * @len: length of the data 22686f1ec32SPatrick McHardy * @data: content 22786f1ec32SPatrick McHardy * 22886f1ec32SPatrick McHardy * The presence of user data is indicated in an object specific fashion, 22986f1ec32SPatrick McHardy * so a length of zero can't occur and the value "len" indicates data 23086f1ec32SPatrick McHardy * of length len + 1. 23186f1ec32SPatrick McHardy */ 23286f1ec32SPatrick McHardy struct nft_userdata { 23386f1ec32SPatrick McHardy u8 len; 2346daf1414SGustavo A. R. Silva unsigned char data[]; 23586f1ec32SPatrick McHardy }; 23686f1ec32SPatrick McHardy 23796518518SPatrick McHardy /** 23820a69341SPatrick McHardy * struct nft_set_elem - generic representation of set elements 23920a69341SPatrick McHardy * 24020a69341SPatrick McHardy * @key: element key 2417b225d0bSPablo Neira Ayuso * @key_end: closing element key 242fe2811ebSPatrick McHardy * @priv: element private data and extensions 24320a69341SPatrick McHardy */ 24420a69341SPatrick McHardy struct nft_set_elem { 2457d740264SPatrick McHardy union { 2467d740264SPatrick McHardy u32 buf[NFT_DATA_VALUE_MAXLEN / sizeof(u32)]; 2477d740264SPatrick McHardy struct nft_data val; 2487d740264SPatrick McHardy } key; 2497b225d0bSPablo Neira Ayuso union { 2507b225d0bSPablo Neira Ayuso u32 buf[NFT_DATA_VALUE_MAXLEN / sizeof(u32)]; 2517b225d0bSPablo Neira Ayuso struct nft_data val; 2527b225d0bSPablo Neira Ayuso } key_end; 253fdb9c405SPablo Neira Ayuso union { 254fdb9c405SPablo Neira Ayuso u32 buf[NFT_DATA_VALUE_MAXLEN / sizeof(u32)]; 255fdb9c405SPablo Neira Ayuso struct nft_data val; 256fdb9c405SPablo Neira Ayuso } data; 257fe2811ebSPatrick McHardy void *priv; 25820a69341SPatrick McHardy }; 25920a69341SPatrick McHardy 26020a69341SPatrick McHardy struct nft_set; 26120a69341SPatrick McHardy struct nft_set_iter { 2628588ac09SPablo Neira Ayuso u8 genmask; 26320a69341SPatrick McHardy unsigned int count; 26420a69341SPatrick McHardy unsigned int skip; 26520a69341SPatrick McHardy int err; 26620a69341SPatrick McHardy int (*fn)(const struct nft_ctx *ctx, 267de70185dSPablo Neira Ayuso struct nft_set *set, 26820a69341SPatrick McHardy const struct nft_set_iter *iter, 269de70185dSPablo Neira Ayuso struct nft_set_elem *elem); 27020a69341SPatrick McHardy }; 27120a69341SPatrick McHardy 27220a69341SPatrick McHardy /** 273c50b960cSPatrick McHardy * struct nft_set_desc - description of set elements 274c50b960cSPatrick McHardy * 275c50b960cSPatrick McHardy * @klen: key length 276c50b960cSPatrick McHardy * @dlen: data length 277c50b960cSPatrick McHardy * @size: number of set elements 278f3a2181eSStefano Brivio * @field_len: length of each field in concatenation, bytes 279f3a2181eSStefano Brivio * @field_count: number of concatenated fields in element 280d56aab26SPablo Neira Ayuso * @expr: set must support for expressions 281c50b960cSPatrick McHardy */ 282c50b960cSPatrick McHardy struct nft_set_desc { 283c50b960cSPatrick McHardy unsigned int klen; 284c50b960cSPatrick McHardy unsigned int dlen; 285c50b960cSPatrick McHardy unsigned int size; 286f3a2181eSStefano Brivio u8 field_len[NFT_REG32_COUNT]; 287f3a2181eSStefano Brivio u8 field_count; 288d56aab26SPablo Neira Ayuso bool expr; 289c50b960cSPatrick McHardy }; 290c50b960cSPatrick McHardy 291c50b960cSPatrick McHardy /** 292c50b960cSPatrick McHardy * enum nft_set_class - performance class 293c50b960cSPatrick McHardy * 294c50b960cSPatrick McHardy * @NFT_LOOKUP_O_1: constant, O(1) 295c50b960cSPatrick McHardy * @NFT_LOOKUP_O_LOG_N: logarithmic, O(log N) 296c50b960cSPatrick McHardy * @NFT_LOOKUP_O_N: linear, O(N) 297c50b960cSPatrick McHardy */ 298c50b960cSPatrick McHardy enum nft_set_class { 299c50b960cSPatrick McHardy NFT_SET_CLASS_O_1, 300c50b960cSPatrick McHardy NFT_SET_CLASS_O_LOG_N, 301c50b960cSPatrick McHardy NFT_SET_CLASS_O_N, 302c50b960cSPatrick McHardy }; 303c50b960cSPatrick McHardy 304c50b960cSPatrick McHardy /** 305c50b960cSPatrick McHardy * struct nft_set_estimate - estimation of memory and performance 306c50b960cSPatrick McHardy * characteristics 307c50b960cSPatrick McHardy * 308c50b960cSPatrick McHardy * @size: required memory 30955af753cSPablo Neira Ayuso * @lookup: lookup performance class 3100b5a7874SPablo Neira Ayuso * @space: memory class 311c50b960cSPatrick McHardy */ 312c50b960cSPatrick McHardy struct nft_set_estimate { 3134ef360ddSTaehee Yoo u64 size; 31455af753cSPablo Neira Ayuso enum nft_set_class lookup; 3150b5a7874SPablo Neira Ayuso enum nft_set_class space; 316c50b960cSPatrick McHardy }; 317c50b960cSPatrick McHardy 31892b211a2SPablo Neira Ayuso #define NFT_EXPR_MAXATTR 16 31992b211a2SPablo Neira Ayuso #define NFT_EXPR_SIZE(size) (sizeof(struct nft_expr) + \ 32092b211a2SPablo Neira Ayuso ALIGN(size, __alignof__(struct nft_expr))) 32192b211a2SPablo Neira Ayuso 32292b211a2SPablo Neira Ayuso /** 32392b211a2SPablo Neira Ayuso * struct nft_expr - nf_tables expression 32492b211a2SPablo Neira Ayuso * 32592b211a2SPablo Neira Ayuso * @ops: expression ops 32692b211a2SPablo Neira Ayuso * @data: expression private data 32792b211a2SPablo Neira Ayuso */ 32892b211a2SPablo Neira Ayuso struct nft_expr { 32992b211a2SPablo Neira Ayuso const struct nft_expr_ops *ops; 33092b211a2SPablo Neira Ayuso unsigned char data[] 33192b211a2SPablo Neira Ayuso __attribute__((aligned(__alignof__(u64)))); 33292b211a2SPablo Neira Ayuso }; 33392b211a2SPablo Neira Ayuso 33492b211a2SPablo Neira Ayuso static inline void *nft_expr_priv(const struct nft_expr *expr) 33592b211a2SPablo Neira Ayuso { 33692b211a2SPablo Neira Ayuso return (void *)expr->data; 33792b211a2SPablo Neira Ayuso } 33892b211a2SPablo Neira Ayuso 33992b211a2SPablo Neira Ayuso int nft_expr_clone(struct nft_expr *dst, struct nft_expr *src); 34092b211a2SPablo Neira Ayuso void nft_expr_destroy(const struct nft_ctx *ctx, struct nft_expr *expr); 34192b211a2SPablo Neira Ayuso int nft_expr_dump(struct sk_buff *skb, unsigned int attr, 34292b211a2SPablo Neira Ayuso const struct nft_expr *expr); 34392b211a2SPablo Neira Ayuso 344b2832dd6SPatrick McHardy struct nft_set_ext; 345b2832dd6SPatrick McHardy 346c50b960cSPatrick McHardy /** 34720a69341SPatrick McHardy * struct nft_set_ops - nf_tables set operations 34820a69341SPatrick McHardy * 34920a69341SPatrick McHardy * @lookup: look up an element within the set 350d0a8d877SAnder Juaristi * @update: update an element if exists, add it if doesn't exist 351d0a8d877SAnder Juaristi * @delete: delete an element 35220a69341SPatrick McHardy * @insert: insert new element into set 353cc02e457SPatrick McHardy * @activate: activate new element in the next generation 3548411b644SPablo Neira Ayuso * @deactivate: lookup for element and deactivate it in the next generation 3551ba1c414SPablo Neira Ayuso * @flush: deactivate element in the next generation 35620a69341SPatrick McHardy * @remove: remove element from set 357d0a8d877SAnder Juaristi * @walk: iterate over all set elements 358ba0e4d99SPablo Neira Ayuso * @get: get set elements 35920a69341SPatrick McHardy * @privsize: function to return size of set private data 36020a69341SPatrick McHardy * @init: initialize private data of new set instance 36120a69341SPatrick McHardy * @destroy: destroy private data of set instance 362fe2811ebSPatrick McHardy * @elemsize: element private size 363d0a8d877SAnder Juaristi * 364d0a8d877SAnder Juaristi * Operations lookup, update and delete have simpler interfaces, are faster 365d0a8d877SAnder Juaristi * and currently only used in the packet path. All the rest are slower, 366d0a8d877SAnder Juaristi * control plane functions. 36720a69341SPatrick McHardy */ 36820a69341SPatrick McHardy struct nft_set_ops { 36942a55769SPablo Neira Ayuso bool (*lookup)(const struct net *net, 37042a55769SPablo Neira Ayuso const struct nft_set *set, 3718cd8937aSPatrick McHardy const u32 *key, 372b2832dd6SPatrick McHardy const struct nft_set_ext **ext); 37322fe54d5SPatrick McHardy bool (*update)(struct nft_set *set, 3748cd8937aSPatrick McHardy const u32 *key, 37522fe54d5SPatrick McHardy void *(*new)(struct nft_set *, 37622fe54d5SPatrick McHardy const struct nft_expr *, 377a55e22e9SPatrick McHardy struct nft_regs *), 37822fe54d5SPatrick McHardy const struct nft_expr *expr, 379a55e22e9SPatrick McHardy struct nft_regs *regs, 38022fe54d5SPatrick McHardy const struct nft_set_ext **ext); 381d0a8d877SAnder Juaristi bool (*delete)(const struct nft_set *set, 382d0a8d877SAnder Juaristi const u32 *key); 38322fe54d5SPatrick McHardy 38442a55769SPablo Neira Ayuso int (*insert)(const struct net *net, 38542a55769SPablo Neira Ayuso const struct nft_set *set, 386c016c7e4SPablo Neira Ayuso const struct nft_set_elem *elem, 387c016c7e4SPablo Neira Ayuso struct nft_set_ext **ext); 38842a55769SPablo Neira Ayuso void (*activate)(const struct net *net, 38942a55769SPablo Neira Ayuso const struct nft_set *set, 390cc02e457SPatrick McHardy const struct nft_set_elem *elem); 39142a55769SPablo Neira Ayuso void * (*deactivate)(const struct net *net, 39242a55769SPablo Neira Ayuso const struct nft_set *set, 393cc02e457SPatrick McHardy const struct nft_set_elem *elem); 3941ba1c414SPablo Neira Ayuso bool (*flush)(const struct net *net, 3958411b644SPablo Neira Ayuso const struct nft_set *set, 3968411b644SPablo Neira Ayuso void *priv); 3975cb82a38SPablo Neira Ayuso void (*remove)(const struct net *net, 3985cb82a38SPablo Neira Ayuso const struct nft_set *set, 39920a69341SPatrick McHardy const struct nft_set_elem *elem); 40020a69341SPatrick McHardy void (*walk)(const struct nft_ctx *ctx, 401de70185dSPablo Neira Ayuso struct nft_set *set, 40220a69341SPatrick McHardy struct nft_set_iter *iter); 403ba0e4d99SPablo Neira Ayuso void * (*get)(const struct net *net, 404ba0e4d99SPablo Neira Ayuso const struct nft_set *set, 405ba0e4d99SPablo Neira Ayuso const struct nft_set_elem *elem, 406ba0e4d99SPablo Neira Ayuso unsigned int flags); 40720a69341SPatrick McHardy 4084ef360ddSTaehee Yoo u64 (*privsize)(const struct nlattr * const nla[], 409347b408dSPablo Neira Ayuso const struct nft_set_desc *desc); 410c50b960cSPatrick McHardy bool (*estimate)(const struct nft_set_desc *desc, 411c50b960cSPatrick McHardy u32 features, 412c50b960cSPatrick McHardy struct nft_set_estimate *est); 41320a69341SPatrick McHardy int (*init)(const struct nft_set *set, 414c50b960cSPatrick McHardy const struct nft_set_desc *desc, 41520a69341SPatrick McHardy const struct nlattr * const nla[]); 41620a69341SPatrick McHardy void (*destroy)(const struct nft_set *set); 41779b174adSPablo Neira Ayuso void (*gc_init)(const struct nft_set *set); 41820a69341SPatrick McHardy 419fe2811ebSPatrick McHardy unsigned int elemsize; 42020a69341SPatrick McHardy }; 42120a69341SPatrick McHardy 42271cc0873SPhil Sutter /** 42371cc0873SPhil Sutter * struct nft_set_type - nf_tables set type 42471cc0873SPhil Sutter * 42571cc0873SPhil Sutter * @ops: set ops for this type 42671cc0873SPhil Sutter * @features: features supported by the implementation 42771cc0873SPhil Sutter */ 42871cc0873SPhil Sutter struct nft_set_type { 42971cc0873SPhil Sutter const struct nft_set_ops ops; 43071cc0873SPhil Sutter u32 features; 43171cc0873SPhil Sutter }; 43271cc0873SPhil Sutter #define to_set_type(o) container_of(o, struct nft_set_type, ops) 43371cc0873SPhil Sutter 434563125a7SPablo Neira Ayuso struct nft_set_elem_expr { 435563125a7SPablo Neira Ayuso u8 size; 436563125a7SPablo Neira Ayuso unsigned char data[] 437563125a7SPablo Neira Ayuso __attribute__((aligned(__alignof__(struct nft_expr)))); 438563125a7SPablo Neira Ayuso }; 439563125a7SPablo Neira Ayuso 440563125a7SPablo Neira Ayuso #define nft_setelem_expr_at(__elem_expr, __offset) \ 441563125a7SPablo Neira Ayuso ((struct nft_expr *)&__elem_expr->data[__offset]) 442563125a7SPablo Neira Ayuso 443563125a7SPablo Neira Ayuso #define nft_setelem_expr_foreach(__expr, __elem_expr, __size) \ 444563125a7SPablo Neira Ayuso for (__expr = nft_setelem_expr_at(__elem_expr, 0), __size = 0; \ 445563125a7SPablo Neira Ayuso __size < (__elem_expr)->size; \ 446563125a7SPablo Neira Ayuso __size += (__expr)->ops->size, __expr = ((void *)(__expr)) + (__expr)->ops->size) 447563125a7SPablo Neira Ayuso 4488cfd9b0fSPablo Neira Ayuso #define NFT_SET_EXPR_MAX 2 4498cfd9b0fSPablo Neira Ayuso 45020a69341SPatrick McHardy /** 45120a69341SPatrick McHardy * struct nft_set - nf_tables set instance 45220a69341SPatrick McHardy * 45320a69341SPatrick McHardy * @list: table set list node 45420a69341SPatrick McHardy * @bindings: list of set bindings 4553453c927SPablo Neira Ayuso * @table: table this set belongs to 4563453c927SPablo Neira Ayuso * @net: netnamespace this set belongs to 45720a69341SPatrick McHardy * @name: name of the set 4583ecbfd65SHarsha Sharma * @handle: unique handle of the set 45920a69341SPatrick McHardy * @ktype: key type (numeric type defined by userspace, not used in the kernel) 46020a69341SPatrick McHardy * @dtype: data type (verdict or numeric type defined by userspace) 4618aeff920SPablo Neira Ayuso * @objtype: object type (see NFT_OBJECT_* definitions) 462c50b960cSPatrick McHardy * @size: maximum set size 463f3a2181eSStefano Brivio * @field_len: length of each field in concatenation, bytes 464f3a2181eSStefano Brivio * @field_count: number of concatenated fields in element 465273fe3f1SPablo Neira Ayuso * @use: number of rules references to this set 466c50b960cSPatrick McHardy * @nelems: number of elements 4673dd0673aSPatrick McHardy * @ndeact: number of deactivated elements queued for removal 468d3e2a111SAnders K. Pedersen * @timeout: default timeout value in jiffies 469761da293SPatrick McHardy * @gc_int: garbage collection interval in msecs 4709363dc4bSArturo Borrero * @policy: set parameterization (see enum nft_set_policies) 471e6d8ecacSCarlos Falgueras García * @udlen: user data length 472e6d8ecacSCarlos Falgueras García * @udata: user data 47365038428SPablo Neira Ayuso * @expr: stateful expression 47420a69341SPatrick McHardy * @ops: set ops 47520a69341SPatrick McHardy * @flags: set flags 47637a9cc52SPablo Neira Ayuso * @genmask: generation mask 47720a69341SPatrick McHardy * @klen: key length 47820a69341SPatrick McHardy * @dlen: data length 47920a69341SPatrick McHardy * @data: private set data 48020a69341SPatrick McHardy */ 48120a69341SPatrick McHardy struct nft_set { 48220a69341SPatrick McHardy struct list_head list; 48320a69341SPatrick McHardy struct list_head bindings; 4843453c927SPablo Neira Ayuso struct nft_table *table; 4853453c927SPablo Neira Ayuso possible_net_t net; 48638745490SPhil Sutter char *name; 4873ecbfd65SHarsha Sharma u64 handle; 48820a69341SPatrick McHardy u32 ktype; 48920a69341SPatrick McHardy u32 dtype; 4908aeff920SPablo Neira Ayuso u32 objtype; 491c50b960cSPatrick McHardy u32 size; 492f3a2181eSStefano Brivio u8 field_len[NFT_REG32_COUNT]; 493f3a2181eSStefano Brivio u8 field_count; 494273fe3f1SPablo Neira Ayuso u32 use; 4953dd0673aSPatrick McHardy atomic_t nelems; 4963dd0673aSPatrick McHardy u32 ndeact; 497761da293SPatrick McHardy u64 timeout; 498761da293SPatrick McHardy u32 gc_int; 4999363dc4bSArturo Borrero u16 policy; 500e6d8ecacSCarlos Falgueras García u16 udlen; 501e6d8ecacSCarlos Falgueras García unsigned char *udata; 50220a69341SPatrick McHardy /* runtime data below here */ 50320a69341SPatrick McHardy const struct nft_set_ops *ops ____cacheline_aligned; 5046a0a8d10SPablo Neira Ayuso u16 flags:14, 50537a9cc52SPablo Neira Ayuso genmask:2; 50620a69341SPatrick McHardy u8 klen; 50720a69341SPatrick McHardy u8 dlen; 5088cfd9b0fSPablo Neira Ayuso u8 num_exprs; 5098cfd9b0fSPablo Neira Ayuso struct nft_expr *exprs[NFT_SET_EXPR_MAX]; 510aaa31047SPablo Neira Ayuso struct list_head catchall_list; 51120a69341SPatrick McHardy unsigned char data[] 51220a69341SPatrick McHardy __attribute__((aligned(__alignof__(u64)))); 51320a69341SPatrick McHardy }; 51420a69341SPatrick McHardy 515408070d6SPablo Neira Ayuso static inline bool nft_set_is_anonymous(const struct nft_set *set) 516408070d6SPablo Neira Ayuso { 517408070d6SPablo Neira Ayuso return set->flags & NFT_SET_ANONYMOUS; 518408070d6SPablo Neira Ayuso } 519408070d6SPablo Neira Ayuso 52020a69341SPatrick McHardy static inline void *nft_set_priv(const struct nft_set *set) 52120a69341SPatrick McHardy { 52220a69341SPatrick McHardy return (void *)set->data; 52320a69341SPatrick McHardy } 52420a69341SPatrick McHardy 5259d098292SPatrick McHardy static inline struct nft_set *nft_set_container_of(const void *priv) 5269d098292SPatrick McHardy { 5279d098292SPatrick McHardy return (void *)priv - offsetof(struct nft_set, data); 5289d098292SPatrick McHardy } 5299d098292SPatrick McHardy 53010659cbaSPablo Neira Ayuso struct nft_set *nft_set_lookup_global(const struct net *net, 531c7a72e3fSPablo Neira Ayuso const struct nft_table *table, 532c7a72e3fSPablo Neira Ayuso const struct nlattr *nla_set_name, 533c7a72e3fSPablo Neira Ayuso const struct nlattr *nla_set_id, 534c7a72e3fSPablo Neira Ayuso u8 genmask); 53520a69341SPatrick McHardy 536aaa31047SPablo Neira Ayuso struct nft_set_ext *nft_set_catchall_lookup(const struct net *net, 537aaa31047SPablo Neira Ayuso const struct nft_set *set); 538aaa31047SPablo Neira Ayuso void *nft_set_catchall_gc(const struct nft_set *set); 539aaa31047SPablo Neira Ayuso 540761da293SPatrick McHardy static inline unsigned long nft_set_gc_interval(const struct nft_set *set) 541761da293SPatrick McHardy { 542761da293SPatrick McHardy return set->gc_int ? msecs_to_jiffies(set->gc_int) : HZ; 543761da293SPatrick McHardy } 544761da293SPatrick McHardy 54520a69341SPatrick McHardy /** 54620a69341SPatrick McHardy * struct nft_set_binding - nf_tables set binding 54720a69341SPatrick McHardy * 54820a69341SPatrick McHardy * @list: set bindings list node 54920a69341SPatrick McHardy * @chain: chain containing the rule bound to the set 55011113e19SPatrick McHardy * @flags: set action flags 55120a69341SPatrick McHardy * 55220a69341SPatrick McHardy * A set binding contains all information necessary for validation 55320a69341SPatrick McHardy * of new elements added to a bound set. 55420a69341SPatrick McHardy */ 55520a69341SPatrick McHardy struct nft_set_binding { 55620a69341SPatrick McHardy struct list_head list; 55720a69341SPatrick McHardy const struct nft_chain *chain; 55811113e19SPatrick McHardy u32 flags; 55920a69341SPatrick McHardy }; 56020a69341SPatrick McHardy 561273fe3f1SPablo Neira Ayuso enum nft_trans_phase; 562273fe3f1SPablo Neira Ayuso void nf_tables_deactivate_set(const struct nft_ctx *ctx, struct nft_set *set, 563273fe3f1SPablo Neira Ayuso struct nft_set_binding *binding, 564273fe3f1SPablo Neira Ayuso enum nft_trans_phase phase); 5655eccdfaaSJoe Perches int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set, 56620a69341SPatrick McHardy struct nft_set_binding *binding); 567cd5125d8SFlorian Westphal void nf_tables_destroy_set(const struct nft_ctx *ctx, struct nft_set *set); 56820a69341SPatrick McHardy 5693ac4c07aSPatrick McHardy /** 5703ac4c07aSPatrick McHardy * enum nft_set_extensions - set extension type IDs 5713ac4c07aSPatrick McHardy * 5723ac4c07aSPatrick McHardy * @NFT_SET_EXT_KEY: element key 5737b225d0bSPablo Neira Ayuso * @NFT_SET_EXT_KEY_END: upper bound element key, for ranges 5743ac4c07aSPatrick McHardy * @NFT_SET_EXT_DATA: mapping data 5753ac4c07aSPatrick McHardy * @NFT_SET_EXT_FLAGS: element flags 576c3e1b005SPatrick McHardy * @NFT_SET_EXT_TIMEOUT: element timeout 577c3e1b005SPatrick McHardy * @NFT_SET_EXT_EXPIRATION: element expiration time 57868e942e8SPatrick McHardy * @NFT_SET_EXT_USERDATA: user data associated with the element 579563125a7SPablo Neira Ayuso * @NFT_SET_EXT_EXPRESSIONS: expressions assiciated with the element 5808aeff920SPablo Neira Ayuso * @NFT_SET_EXT_OBJREF: stateful object reference associated with element 5813ac4c07aSPatrick McHardy * @NFT_SET_EXT_NUM: number of extension types 5823ac4c07aSPatrick McHardy */ 5833ac4c07aSPatrick McHardy enum nft_set_extensions { 5843ac4c07aSPatrick McHardy NFT_SET_EXT_KEY, 5857b225d0bSPablo Neira Ayuso NFT_SET_EXT_KEY_END, 5863ac4c07aSPatrick McHardy NFT_SET_EXT_DATA, 5873ac4c07aSPatrick McHardy NFT_SET_EXT_FLAGS, 588c3e1b005SPatrick McHardy NFT_SET_EXT_TIMEOUT, 589c3e1b005SPatrick McHardy NFT_SET_EXT_EXPIRATION, 59068e942e8SPatrick McHardy NFT_SET_EXT_USERDATA, 591563125a7SPablo Neira Ayuso NFT_SET_EXT_EXPRESSIONS, 5928aeff920SPablo Neira Ayuso NFT_SET_EXT_OBJREF, 5933ac4c07aSPatrick McHardy NFT_SET_EXT_NUM 5943ac4c07aSPatrick McHardy }; 5953ac4c07aSPatrick McHardy 5963ac4c07aSPatrick McHardy /** 5973ac4c07aSPatrick McHardy * struct nft_set_ext_type - set extension type 5983ac4c07aSPatrick McHardy * 5993ac4c07aSPatrick McHardy * @len: fixed part length of the extension 6003ac4c07aSPatrick McHardy * @align: alignment requirements of the extension 6013ac4c07aSPatrick McHardy */ 6023ac4c07aSPatrick McHardy struct nft_set_ext_type { 6033ac4c07aSPatrick McHardy u8 len; 6043ac4c07aSPatrick McHardy u8 align; 6053ac4c07aSPatrick McHardy }; 6063ac4c07aSPatrick McHardy 6073ac4c07aSPatrick McHardy extern const struct nft_set_ext_type nft_set_ext_types[]; 6083ac4c07aSPatrick McHardy 6093ac4c07aSPatrick McHardy /** 6103ac4c07aSPatrick McHardy * struct nft_set_ext_tmpl - set extension template 6113ac4c07aSPatrick McHardy * 6123ac4c07aSPatrick McHardy * @len: length of extension area 6133ac4c07aSPatrick McHardy * @offset: offsets of individual extension types 6143ac4c07aSPatrick McHardy */ 6153ac4c07aSPatrick McHardy struct nft_set_ext_tmpl { 6163ac4c07aSPatrick McHardy u16 len; 6173ac4c07aSPatrick McHardy u8 offset[NFT_SET_EXT_NUM]; 6183ac4c07aSPatrick McHardy }; 6193ac4c07aSPatrick McHardy 6203ac4c07aSPatrick McHardy /** 6213ac4c07aSPatrick McHardy * struct nft_set_ext - set extensions 6223ac4c07aSPatrick McHardy * 623cc02e457SPatrick McHardy * @genmask: generation mask 6243ac4c07aSPatrick McHardy * @offset: offsets of individual extension types 6253ac4c07aSPatrick McHardy * @data: beginning of extension data 6263ac4c07aSPatrick McHardy */ 6273ac4c07aSPatrick McHardy struct nft_set_ext { 628cc02e457SPatrick McHardy u8 genmask; 6293ac4c07aSPatrick McHardy u8 offset[NFT_SET_EXT_NUM]; 6306daf1414SGustavo A. R. Silva char data[]; 6313ac4c07aSPatrick McHardy }; 6323ac4c07aSPatrick McHardy 6333ac4c07aSPatrick McHardy static inline void nft_set_ext_prepare(struct nft_set_ext_tmpl *tmpl) 6343ac4c07aSPatrick McHardy { 6353ac4c07aSPatrick McHardy memset(tmpl, 0, sizeof(*tmpl)); 6363ac4c07aSPatrick McHardy tmpl->len = sizeof(struct nft_set_ext); 6373ac4c07aSPatrick McHardy } 6383ac4c07aSPatrick McHardy 6393ac4c07aSPatrick McHardy static inline void nft_set_ext_add_length(struct nft_set_ext_tmpl *tmpl, u8 id, 6403ac4c07aSPatrick McHardy unsigned int len) 6413ac4c07aSPatrick McHardy { 6423ac4c07aSPatrick McHardy tmpl->len = ALIGN(tmpl->len, nft_set_ext_types[id].align); 6433ac4c07aSPatrick McHardy BUG_ON(tmpl->len > U8_MAX); 6443ac4c07aSPatrick McHardy tmpl->offset[id] = tmpl->len; 6453ac4c07aSPatrick McHardy tmpl->len += nft_set_ext_types[id].len + len; 6463ac4c07aSPatrick McHardy } 6473ac4c07aSPatrick McHardy 6483ac4c07aSPatrick McHardy static inline void nft_set_ext_add(struct nft_set_ext_tmpl *tmpl, u8 id) 6493ac4c07aSPatrick McHardy { 6503ac4c07aSPatrick McHardy nft_set_ext_add_length(tmpl, id, 0); 6513ac4c07aSPatrick McHardy } 6523ac4c07aSPatrick McHardy 6533ac4c07aSPatrick McHardy static inline void nft_set_ext_init(struct nft_set_ext *ext, 6543ac4c07aSPatrick McHardy const struct nft_set_ext_tmpl *tmpl) 6553ac4c07aSPatrick McHardy { 6563ac4c07aSPatrick McHardy memcpy(ext->offset, tmpl->offset, sizeof(ext->offset)); 6573ac4c07aSPatrick McHardy } 6583ac4c07aSPatrick McHardy 6593ac4c07aSPatrick McHardy static inline bool __nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) 6603ac4c07aSPatrick McHardy { 6613ac4c07aSPatrick McHardy return !!ext->offset[id]; 6623ac4c07aSPatrick McHardy } 6633ac4c07aSPatrick McHardy 6643ac4c07aSPatrick McHardy static inline bool nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) 6653ac4c07aSPatrick McHardy { 6663ac4c07aSPatrick McHardy return ext && __nft_set_ext_exists(ext, id); 6673ac4c07aSPatrick McHardy } 6683ac4c07aSPatrick McHardy 6693ac4c07aSPatrick McHardy static inline void *nft_set_ext(const struct nft_set_ext *ext, u8 id) 6703ac4c07aSPatrick McHardy { 6713ac4c07aSPatrick McHardy return (void *)ext + ext->offset[id]; 6723ac4c07aSPatrick McHardy } 6733ac4c07aSPatrick McHardy 6743ac4c07aSPatrick McHardy static inline struct nft_data *nft_set_ext_key(const struct nft_set_ext *ext) 6753ac4c07aSPatrick McHardy { 6763ac4c07aSPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_KEY); 6773ac4c07aSPatrick McHardy } 6783ac4c07aSPatrick McHardy 6797b225d0bSPablo Neira Ayuso static inline struct nft_data *nft_set_ext_key_end(const struct nft_set_ext *ext) 6807b225d0bSPablo Neira Ayuso { 6817b225d0bSPablo Neira Ayuso return nft_set_ext(ext, NFT_SET_EXT_KEY_END); 6827b225d0bSPablo Neira Ayuso } 6837b225d0bSPablo Neira Ayuso 6843ac4c07aSPatrick McHardy static inline struct nft_data *nft_set_ext_data(const struct nft_set_ext *ext) 6853ac4c07aSPatrick McHardy { 6863ac4c07aSPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_DATA); 6873ac4c07aSPatrick McHardy } 6883ac4c07aSPatrick McHardy 6893ac4c07aSPatrick McHardy static inline u8 *nft_set_ext_flags(const struct nft_set_ext *ext) 6903ac4c07aSPatrick McHardy { 6913ac4c07aSPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_FLAGS); 6923ac4c07aSPatrick McHardy } 693ef1f7df9SPatrick McHardy 694c3e1b005SPatrick McHardy static inline u64 *nft_set_ext_timeout(const struct nft_set_ext *ext) 695c3e1b005SPatrick McHardy { 696c3e1b005SPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_TIMEOUT); 697c3e1b005SPatrick McHardy } 698c3e1b005SPatrick McHardy 6998e1102d5SFlorian Westphal static inline u64 *nft_set_ext_expiration(const struct nft_set_ext *ext) 700c3e1b005SPatrick McHardy { 701c3e1b005SPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_EXPIRATION); 702c3e1b005SPatrick McHardy } 703c3e1b005SPatrick McHardy 70468e942e8SPatrick McHardy static inline struct nft_userdata *nft_set_ext_userdata(const struct nft_set_ext *ext) 70568e942e8SPatrick McHardy { 70668e942e8SPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_USERDATA); 70768e942e8SPatrick McHardy } 70868e942e8SPatrick McHardy 709563125a7SPablo Neira Ayuso static inline struct nft_set_elem_expr *nft_set_ext_expr(const struct nft_set_ext *ext) 710f25ad2e9SPatrick McHardy { 711563125a7SPablo Neira Ayuso return nft_set_ext(ext, NFT_SET_EXT_EXPRESSIONS); 712f25ad2e9SPatrick McHardy } 713f25ad2e9SPatrick McHardy 714c3e1b005SPatrick McHardy static inline bool nft_set_elem_expired(const struct nft_set_ext *ext) 715c3e1b005SPatrick McHardy { 716c3e1b005SPatrick McHardy return nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION) && 7178e1102d5SFlorian Westphal time_is_before_eq_jiffies64(*nft_set_ext_expiration(ext)); 718c3e1b005SPatrick McHardy } 719c3e1b005SPatrick McHardy 720fe2811ebSPatrick McHardy static inline struct nft_set_ext *nft_set_elem_ext(const struct nft_set *set, 721fe2811ebSPatrick McHardy void *elem) 722fe2811ebSPatrick McHardy { 723fe2811ebSPatrick McHardy return elem + set->ops->elemsize; 724fe2811ebSPatrick McHardy } 725fe2811ebSPatrick McHardy 7268aeff920SPablo Neira Ayuso static inline struct nft_object **nft_set_ext_obj(const struct nft_set_ext *ext) 7278aeff920SPablo Neira Ayuso { 7288aeff920SPablo Neira Ayuso return nft_set_ext(ext, NFT_SET_EXT_OBJREF); 7298aeff920SPablo Neira Ayuso } 7308aeff920SPablo Neira Ayuso 731a7fc9368SPablo Neira Ayuso struct nft_expr *nft_set_elem_expr_alloc(const struct nft_ctx *ctx, 732a7fc9368SPablo Neira Ayuso const struct nft_set *set, 733a7fc9368SPablo Neira Ayuso const struct nlattr *attr); 734a7fc9368SPablo Neira Ayuso 73522fe54d5SPatrick McHardy void *nft_set_elem_init(const struct nft_set *set, 73622fe54d5SPatrick McHardy const struct nft_set_ext_tmpl *tmpl, 7377b225d0bSPablo Neira Ayuso const u32 *key, const u32 *key_end, const u32 *data, 73879ebb5bbSLaura Garcia Liebana u64 timeout, u64 expiration, gfp_t gfp); 739fca05d4dSPablo Neira Ayuso int nft_set_elem_expr_clone(const struct nft_ctx *ctx, struct nft_set *set, 740fca05d4dSPablo Neira Ayuso struct nft_expr *expr_array[]); 74161f9e292SLiping Zhang void nft_set_elem_destroy(const struct nft_set *set, void *elem, 74261f9e292SLiping Zhang bool destroy_expr); 74361edafbbSPatrick McHardy 74420a69341SPatrick McHardy /** 745cfed7e1bSPatrick McHardy * struct nft_set_gc_batch_head - nf_tables set garbage collection batch 746cfed7e1bSPatrick McHardy * 747cfed7e1bSPatrick McHardy * @rcu: rcu head 748cfed7e1bSPatrick McHardy * @set: set the elements belong to 749cfed7e1bSPatrick McHardy * @cnt: count of elements 750cfed7e1bSPatrick McHardy */ 751cfed7e1bSPatrick McHardy struct nft_set_gc_batch_head { 752cfed7e1bSPatrick McHardy struct rcu_head rcu; 753cfed7e1bSPatrick McHardy const struct nft_set *set; 754cfed7e1bSPatrick McHardy unsigned int cnt; 755cfed7e1bSPatrick McHardy }; 756cfed7e1bSPatrick McHardy 757cfed7e1bSPatrick McHardy #define NFT_SET_GC_BATCH_SIZE ((PAGE_SIZE - \ 758cfed7e1bSPatrick McHardy sizeof(struct nft_set_gc_batch_head)) / \ 759cfed7e1bSPatrick McHardy sizeof(void *)) 760cfed7e1bSPatrick McHardy 761cfed7e1bSPatrick McHardy /** 762cfed7e1bSPatrick McHardy * struct nft_set_gc_batch - nf_tables set garbage collection batch 763cfed7e1bSPatrick McHardy * 764cfed7e1bSPatrick McHardy * @head: GC batch head 765cfed7e1bSPatrick McHardy * @elems: garbage collection elements 766cfed7e1bSPatrick McHardy */ 767cfed7e1bSPatrick McHardy struct nft_set_gc_batch { 768cfed7e1bSPatrick McHardy struct nft_set_gc_batch_head head; 769cfed7e1bSPatrick McHardy void *elems[NFT_SET_GC_BATCH_SIZE]; 770cfed7e1bSPatrick McHardy }; 771cfed7e1bSPatrick McHardy 772cfed7e1bSPatrick McHardy struct nft_set_gc_batch *nft_set_gc_batch_alloc(const struct nft_set *set, 773cfed7e1bSPatrick McHardy gfp_t gfp); 774cfed7e1bSPatrick McHardy void nft_set_gc_batch_release(struct rcu_head *rcu); 775cfed7e1bSPatrick McHardy 776cfed7e1bSPatrick McHardy static inline void nft_set_gc_batch_complete(struct nft_set_gc_batch *gcb) 777cfed7e1bSPatrick McHardy { 778cfed7e1bSPatrick McHardy if (gcb != NULL) 779cfed7e1bSPatrick McHardy call_rcu(&gcb->head.rcu, nft_set_gc_batch_release); 780cfed7e1bSPatrick McHardy } 781cfed7e1bSPatrick McHardy 782cfed7e1bSPatrick McHardy static inline struct nft_set_gc_batch * 783cfed7e1bSPatrick McHardy nft_set_gc_batch_check(const struct nft_set *set, struct nft_set_gc_batch *gcb, 784cfed7e1bSPatrick McHardy gfp_t gfp) 785cfed7e1bSPatrick McHardy { 786cfed7e1bSPatrick McHardy if (gcb != NULL) { 787cfed7e1bSPatrick McHardy if (gcb->head.cnt + 1 < ARRAY_SIZE(gcb->elems)) 788cfed7e1bSPatrick McHardy return gcb; 789cfed7e1bSPatrick McHardy nft_set_gc_batch_complete(gcb); 790cfed7e1bSPatrick McHardy } 791cfed7e1bSPatrick McHardy return nft_set_gc_batch_alloc(set, gfp); 792cfed7e1bSPatrick McHardy } 793cfed7e1bSPatrick McHardy 794cfed7e1bSPatrick McHardy static inline void nft_set_gc_batch_add(struct nft_set_gc_batch *gcb, 795cfed7e1bSPatrick McHardy void *elem) 796cfed7e1bSPatrick McHardy { 797cfed7e1bSPatrick McHardy gcb->elems[gcb->head.cnt++] = elem; 798cfed7e1bSPatrick McHardy } 799cfed7e1bSPatrick McHardy 800b8e20400SPablo Neira Ayuso struct nft_expr_ops; 801cfed7e1bSPatrick McHardy /** 802ef1f7df9SPatrick McHardy * struct nft_expr_type - nf_tables expression type 80396518518SPatrick McHardy * 804ef1f7df9SPatrick McHardy * @select_ops: function to select nft_expr_ops 805b8e20400SPablo Neira Ayuso * @release_ops: release nft_expr_ops 806ef1f7df9SPatrick McHardy * @ops: default ops, used when no select_ops functions is present 80796518518SPatrick McHardy * @list: used internally 80896518518SPatrick McHardy * @name: Identifier 80996518518SPatrick McHardy * @owner: module reference 81096518518SPatrick McHardy * @policy: netlink attribute policy 81196518518SPatrick McHardy * @maxattr: highest netlink attribute number 81264d46806SPatrick McHardy * @family: address family for AF-specific types 813151d799aSPatrick McHardy * @flags: expression type flags 814ef1f7df9SPatrick McHardy */ 815ef1f7df9SPatrick McHardy struct nft_expr_type { 8160ca743a5SPablo Neira Ayuso const struct nft_expr_ops *(*select_ops)(const struct nft_ctx *, 8170ca743a5SPablo Neira Ayuso const struct nlattr * const tb[]); 818b8e20400SPablo Neira Ayuso void (*release_ops)(const struct nft_expr_ops *ops); 819ef1f7df9SPatrick McHardy const struct nft_expr_ops *ops; 820ef1f7df9SPatrick McHardy struct list_head list; 821ef1f7df9SPatrick McHardy const char *name; 822ef1f7df9SPatrick McHardy struct module *owner; 823ef1f7df9SPatrick McHardy const struct nla_policy *policy; 824ef1f7df9SPatrick McHardy unsigned int maxattr; 82564d46806SPatrick McHardy u8 family; 826151d799aSPatrick McHardy u8 flags; 827ef1f7df9SPatrick McHardy }; 828ef1f7df9SPatrick McHardy 829151d799aSPatrick McHardy #define NFT_EXPR_STATEFUL 0x1 83079b174adSPablo Neira Ayuso #define NFT_EXPR_GC 0x2 831151d799aSPatrick McHardy 832f6ac8585SPablo Neira Ayuso enum nft_trans_phase { 833f6ac8585SPablo Neira Ayuso NFT_TRANS_PREPARE, 834f6ac8585SPablo Neira Ayuso NFT_TRANS_ABORT, 835f6ac8585SPablo Neira Ayuso NFT_TRANS_COMMIT, 836f6ac8585SPablo Neira Ayuso NFT_TRANS_RELEASE 837f6ac8585SPablo Neira Ayuso }; 838f6ac8585SPablo Neira Ayuso 839c9626a2cSPablo Neira Ayuso struct nft_flow_rule; 840c9626a2cSPablo Neira Ayuso struct nft_offload_ctx; 841c9626a2cSPablo Neira Ayuso 842ef1f7df9SPatrick McHardy /** 843ef1f7df9SPatrick McHardy * struct nft_expr_ops - nf_tables expression operations 844ef1f7df9SPatrick McHardy * 845ef1f7df9SPatrick McHardy * @eval: Expression evaluation function 84696518518SPatrick McHardy * @size: full expression size, including private data size 847ef1f7df9SPatrick McHardy * @init: initialization function 848cd5125d8SFlorian Westphal * @activate: activate expression in the next generation 849cd5125d8SFlorian Westphal * @deactivate: deactivate expression in next generation 850cd5125d8SFlorian Westphal * @destroy: destruction function, called after synchronize_rcu 851ef1f7df9SPatrick McHardy * @dump: function to dump parameters 852ef1f7df9SPatrick McHardy * @type: expression type 8530ca743a5SPablo Neira Ayuso * @validate: validate expression, called during loop detection 8540ca743a5SPablo Neira Ayuso * @data: extra data to attach to this expression operation 85596518518SPatrick McHardy */ 85696518518SPatrick McHardy struct nft_expr_ops { 85796518518SPatrick McHardy void (*eval)(const struct nft_expr *expr, 858a55e22e9SPatrick McHardy struct nft_regs *regs, 85996518518SPatrick McHardy const struct nft_pktinfo *pkt); 860086f3321SPablo Neira Ayuso int (*clone)(struct nft_expr *dst, 861086f3321SPablo Neira Ayuso const struct nft_expr *src); 862ef1f7df9SPatrick McHardy unsigned int size; 863ef1f7df9SPatrick McHardy 86496518518SPatrick McHardy int (*init)(const struct nft_ctx *ctx, 86596518518SPatrick McHardy const struct nft_expr *expr, 86696518518SPatrick McHardy const struct nlattr * const tb[]); 867bb7b40aeSPablo Neira Ayuso void (*activate)(const struct nft_ctx *ctx, 868bb7b40aeSPablo Neira Ayuso const struct nft_expr *expr); 869bb7b40aeSPablo Neira Ayuso void (*deactivate)(const struct nft_ctx *ctx, 870f6ac8585SPablo Neira Ayuso const struct nft_expr *expr, 871f6ac8585SPablo Neira Ayuso enum nft_trans_phase phase); 87262472bceSPatrick McHardy void (*destroy)(const struct nft_ctx *ctx, 87362472bceSPatrick McHardy const struct nft_expr *expr); 874371ebcbbSPablo Neira Ayuso void (*destroy_clone)(const struct nft_ctx *ctx, 875371ebcbbSPablo Neira Ayuso const struct nft_expr *expr); 87696518518SPatrick McHardy int (*dump)(struct sk_buff *skb, 87796518518SPatrick McHardy const struct nft_expr *expr); 8780ca743a5SPablo Neira Ayuso int (*validate)(const struct nft_ctx *ctx, 8790ca743a5SPablo Neira Ayuso const struct nft_expr *expr, 8800ca743a5SPablo Neira Ayuso const struct nft_data **data); 88179b174adSPablo Neira Ayuso bool (*gc)(struct net *net, 88279b174adSPablo Neira Ayuso const struct nft_expr *expr); 883c9626a2cSPablo Neira Ayuso int (*offload)(struct nft_offload_ctx *ctx, 884c9626a2cSPablo Neira Ayuso struct nft_flow_rule *flow, 885c9626a2cSPablo Neira Ayuso const struct nft_expr *expr); 886b72920f6SPablo Neira Ayuso void (*offload_stats)(struct nft_expr *expr, 887b72920f6SPablo Neira Ayuso const struct flow_stats *stats); 888c9626a2cSPablo Neira Ayuso u32 offload_flags; 889ef1f7df9SPatrick McHardy const struct nft_expr_type *type; 8900ca743a5SPablo Neira Ayuso void *data; 89196518518SPatrick McHardy }; 89296518518SPatrick McHardy 89396518518SPatrick McHardy /** 89496518518SPatrick McHardy * struct nft_rule - nf_tables rule 89596518518SPatrick McHardy * 89696518518SPatrick McHardy * @list: used internally 89796518518SPatrick McHardy * @handle: rule handle 8980628b123SPablo Neira Ayuso * @genmask: generation mask 89996518518SPatrick McHardy * @dlen: length of expression data 90086f1ec32SPatrick McHardy * @udata: user data is appended to the rule 90196518518SPatrick McHardy * @data: expression data 90296518518SPatrick McHardy */ 90396518518SPatrick McHardy struct nft_rule { 90496518518SPatrick McHardy struct list_head list; 9050768b3b3SPablo Neira Ayuso u64 handle:42, 9060628b123SPablo Neira Ayuso genmask:2, 9070768b3b3SPablo Neira Ayuso dlen:12, 90886f1ec32SPatrick McHardy udata:1; 90996518518SPatrick McHardy unsigned char data[] 91096518518SPatrick McHardy __attribute__((aligned(__alignof__(struct nft_expr)))); 91196518518SPatrick McHardy }; 91296518518SPatrick McHardy 91396518518SPatrick McHardy static inline struct nft_expr *nft_expr_first(const struct nft_rule *rule) 91496518518SPatrick McHardy { 91596518518SPatrick McHardy return (struct nft_expr *)&rule->data[0]; 91696518518SPatrick McHardy } 91796518518SPatrick McHardy 91896518518SPatrick McHardy static inline struct nft_expr *nft_expr_next(const struct nft_expr *expr) 91996518518SPatrick McHardy { 92096518518SPatrick McHardy return ((void *)expr) + expr->ops->size; 92196518518SPatrick McHardy } 92296518518SPatrick McHardy 92396518518SPatrick McHardy static inline struct nft_expr *nft_expr_last(const struct nft_rule *rule) 92496518518SPatrick McHardy { 92596518518SPatrick McHardy return (struct nft_expr *)&rule->data[rule->dlen]; 92696518518SPatrick McHardy } 92796518518SPatrick McHardy 92831cc578aSSaeed Mirzamohammadi static inline bool nft_expr_more(const struct nft_rule *rule, 92931cc578aSSaeed Mirzamohammadi const struct nft_expr *expr) 93031cc578aSSaeed Mirzamohammadi { 93131cc578aSSaeed Mirzamohammadi return expr != nft_expr_last(rule) && expr->ops; 93231cc578aSSaeed Mirzamohammadi } 93331cc578aSSaeed Mirzamohammadi 93486f1ec32SPatrick McHardy static inline struct nft_userdata *nft_userdata(const struct nft_rule *rule) 9350768b3b3SPablo Neira Ayuso { 9360768b3b3SPablo Neira Ayuso return (void *)&rule->data[rule->dlen]; 9370768b3b3SPablo Neira Ayuso } 9380768b3b3SPablo Neira Ayuso 939d0e2c7deSPablo Neira Ayuso void nf_tables_rule_release(const struct nft_ctx *ctx, struct nft_rule *rule); 940d0e2c7deSPablo Neira Ayuso 94176adfafeSPablo Neira Ayuso static inline void nft_set_elem_update_expr(const struct nft_set_ext *ext, 94276adfafeSPablo Neira Ayuso struct nft_regs *regs, 94376adfafeSPablo Neira Ayuso const struct nft_pktinfo *pkt) 94476adfafeSPablo Neira Ayuso { 945563125a7SPablo Neira Ayuso struct nft_set_elem_expr *elem_expr; 94676adfafeSPablo Neira Ayuso struct nft_expr *expr; 947563125a7SPablo Neira Ayuso u32 size; 94876adfafeSPablo Neira Ayuso 949563125a7SPablo Neira Ayuso if (__nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS)) { 950563125a7SPablo Neira Ayuso elem_expr = nft_set_ext_expr(ext); 951563125a7SPablo Neira Ayuso nft_setelem_expr_foreach(expr, elem_expr, size) { 95276adfafeSPablo Neira Ayuso expr->ops->eval(expr, regs, pkt); 953563125a7SPablo Neira Ayuso if (regs->verdict.code == NFT_BREAK) 954563125a7SPablo Neira Ayuso return; 955563125a7SPablo Neira Ayuso } 95676adfafeSPablo Neira Ayuso } 95776adfafeSPablo Neira Ayuso } 95876adfafeSPablo Neira Ayuso 95996518518SPatrick McHardy /* 96096518518SPatrick McHardy * The last pointer isn't really necessary, but the compiler isn't able to 96196518518SPatrick McHardy * determine that the result of nft_expr_last() is always the same since it 96296518518SPatrick McHardy * can't assume that the dlen value wasn't changed within calls in the loop. 96396518518SPatrick McHardy */ 96496518518SPatrick McHardy #define nft_rule_for_each_expr(expr, last, rule) \ 96596518518SPatrick McHardy for ((expr) = nft_expr_first(rule), (last) = nft_expr_last(rule); \ 96696518518SPatrick McHardy (expr) != (last); \ 96796518518SPatrick McHardy (expr) = nft_expr_next(expr)) 96896518518SPatrick McHardy 969ad652f38SPablo Neira Ayuso #define NFT_CHAIN_POLICY_UNSET U8_MAX 970ad652f38SPablo Neira Ayuso 97196518518SPatrick McHardy /** 97296518518SPatrick McHardy * struct nft_chain - nf_tables chain 97396518518SPatrick McHardy * 97496518518SPatrick McHardy * @rules: list of rules in the chain 97596518518SPatrick McHardy * @list: used internally 9761b2470e5SFlorian Westphal * @rhlhead: used internally 977b5bc89bfSPablo Neira Ayuso * @table: table that this chain belongs to 97896518518SPatrick McHardy * @handle: chain handle 97996518518SPatrick McHardy * @use: number of jump references to this chain 980a0a7379eSPablo Neira Ayuso * @flags: bitmask of enum nft_chain_flags 98196518518SPatrick McHardy * @name: name of the chain 98296518518SPatrick McHardy */ 98396518518SPatrick McHardy struct nft_chain { 9840cbc06b3SFlorian Westphal struct nft_rule *__rcu *rules_gen_0; 9850cbc06b3SFlorian Westphal struct nft_rule *__rcu *rules_gen_1; 98696518518SPatrick McHardy struct list_head rules; 98796518518SPatrick McHardy struct list_head list; 9881b2470e5SFlorian Westphal struct rhlist_head rhlhead; 989b5bc89bfSPablo Neira Ayuso struct nft_table *table; 99096518518SPatrick McHardy u64 handle; 991a0a7379eSPablo Neira Ayuso u32 use; 992d0e2c7deSPablo Neira Ayuso u8 flags:5, 993d0e2c7deSPablo Neira Ayuso bound:1, 994664b0f8cSPablo Neira Ayuso genmask:2; 995b7263e07SPhil Sutter char *name; 996002f2176SJose M. Guisado Gomez u16 udlen; 997002f2176SJose M. Guisado Gomez u8 *udata; 9980cbc06b3SFlorian Westphal 9990cbc06b3SFlorian Westphal /* Only used during control plane commit phase: */ 10000cbc06b3SFlorian Westphal struct nft_rule **rules_next; 100196518518SPatrick McHardy }; 100296518518SPatrick McHardy 1003a654de8fSPablo Neira Ayuso int nft_chain_validate(const struct nft_ctx *ctx, const struct nft_chain *chain); 1004a654de8fSPablo Neira Ayuso 100532537e91SPablo Neira Ayuso enum nft_chain_types { 10069370761cSPablo Neira Ayuso NFT_CHAIN_T_DEFAULT = 0, 10079370761cSPablo Neira Ayuso NFT_CHAIN_T_ROUTE, 10089370761cSPablo Neira Ayuso NFT_CHAIN_T_NAT, 10099370761cSPablo Neira Ayuso NFT_CHAIN_T_MAX 10109370761cSPablo Neira Ayuso }; 10119370761cSPablo Neira Ayuso 10121a1e1a12SPatrick McHardy /** 101332537e91SPablo Neira Ayuso * struct nft_chain_type - nf_tables chain type info 10141a1e1a12SPatrick McHardy * 10151a1e1a12SPatrick McHardy * @name: name of the type 10161a1e1a12SPatrick McHardy * @type: numeric identifier 10171a1e1a12SPatrick McHardy * @family: address family 10181a1e1a12SPatrick McHardy * @owner: module owner 10191a1e1a12SPatrick McHardy * @hook_mask: mask of valid hooks 1020c2f9eafeSPablo Neira Ayuso * @hooks: array of hook functions 10214e25ceb8SFlorian Westphal * @ops_register: base chain register function 10224e25ceb8SFlorian Westphal * @ops_unregister: base chain unregister function 10231a1e1a12SPatrick McHardy */ 102432537e91SPablo Neira Ayuso struct nft_chain_type { 10251a1e1a12SPatrick McHardy const char *name; 102632537e91SPablo Neira Ayuso enum nft_chain_types type; 10271a1e1a12SPatrick McHardy int family; 10281a1e1a12SPatrick McHardy struct module *owner; 10291a1e1a12SPatrick McHardy unsigned int hook_mask; 1030d25e2e93SPablo Neira Ayuso nf_hookfn *hooks[NFT_MAX_HOOKS]; 10314e25ceb8SFlorian Westphal int (*ops_register)(struct net *net, const struct nf_hook_ops *ops); 10324e25ceb8SFlorian Westphal void (*ops_unregister)(struct net *net, const struct nf_hook_ops *ops); 10331a1e1a12SPatrick McHardy }; 10341a1e1a12SPatrick McHardy 10357210e4e3SPablo Neira Ayuso int nft_chain_validate_dependency(const struct nft_chain *chain, 103632537e91SPablo Neira Ayuso enum nft_chain_types type); 103775e8d06dSPablo Neira Ayuso int nft_chain_validate_hooks(const struct nft_chain *chain, 103875e8d06dSPablo Neira Ayuso unsigned int hook_flags); 10397210e4e3SPablo Neira Ayuso 1040d0e2c7deSPablo Neira Ayuso static inline bool nft_chain_is_bound(struct nft_chain *chain) 1041d0e2c7deSPablo Neira Ayuso { 1042d0e2c7deSPablo Neira Ayuso return (chain->flags & NFT_CHAIN_BINDING) && chain->bound; 1043d0e2c7deSPablo Neira Ayuso } 1044d0e2c7deSPablo Neira Ayuso 1045d0e2c7deSPablo Neira Ayuso void nft_chain_del(struct nft_chain *chain); 1046d0e2c7deSPablo Neira Ayuso void nf_tables_chain_destroy(struct nft_ctx *ctx); 1047d0e2c7deSPablo Neira Ayuso 10480ca743a5SPablo Neira Ayuso struct nft_stats { 10490ca743a5SPablo Neira Ayuso u64 bytes; 10500ca743a5SPablo Neira Ayuso u64 pkts; 1051ce355e20SEric Dumazet struct u64_stats_sync syncp; 10520ca743a5SPablo Neira Ayuso }; 10530ca743a5SPablo Neira Ayuso 10543f0465a9SPablo Neira Ayuso struct nft_hook { 10553f0465a9SPablo Neira Ayuso struct list_head list; 1056abadb2f8SPablo Neira Ayuso bool inactive; 10573f0465a9SPablo Neira Ayuso struct nf_hook_ops ops; 10583f0465a9SPablo Neira Ayuso struct rcu_head rcu; 10593f0465a9SPablo Neira Ayuso }; 10603f0465a9SPablo Neira Ayuso 106196518518SPatrick McHardy /** 106296518518SPatrick McHardy * struct nft_base_chain - nf_tables base chain 106396518518SPatrick McHardy * 106496518518SPatrick McHardy * @ops: netfilter hook ops 1065d54725cdSPablo Neira Ayuso * @hook_list: list of netfilter hooks (for NFPROTO_NETDEV family) 10669370761cSPablo Neira Ayuso * @type: chain type 10670ca743a5SPablo Neira Ayuso * @policy: default policy 10680ca743a5SPablo Neira Ayuso * @stats: per-cpu chain stats 106996518518SPatrick McHardy * @chain: the chain 107014bfb13fSPablo Neira Ayuso * @flow_block: flow block (for hardware offload) 107196518518SPatrick McHardy */ 107296518518SPatrick McHardy struct nft_base_chain { 1073c974a3a3SPablo Neira Ayuso struct nf_hook_ops ops; 1074d54725cdSPablo Neira Ayuso struct list_head hook_list; 107532537e91SPablo Neira Ayuso const struct nft_chain_type *type; 10760ca743a5SPablo Neira Ayuso u8 policy; 1077835b8033SPablo Neira Ayuso u8 flags; 10780ca743a5SPablo Neira Ayuso struct nft_stats __percpu *stats; 107996518518SPatrick McHardy struct nft_chain chain; 108014bfb13fSPablo Neira Ayuso struct flow_block flow_block; 108196518518SPatrick McHardy }; 108296518518SPatrick McHardy 108396518518SPatrick McHardy static inline struct nft_base_chain *nft_base_chain(const struct nft_chain *chain) 108496518518SPatrick McHardy { 108596518518SPatrick McHardy return container_of(chain, struct nft_base_chain, chain); 108696518518SPatrick McHardy } 108796518518SPatrick McHardy 1088f323d954SPablo Neira Ayuso static inline bool nft_is_base_chain(const struct nft_chain *chain) 1089f323d954SPablo Neira Ayuso { 109067c49de4SPablo Neira Ayuso return chain->flags & NFT_CHAIN_BASE; 1091f323d954SPablo Neira Ayuso } 1092f323d954SPablo Neira Ayuso 10935ebe0b0eSPablo Neira Ayuso int __nft_release_basechain(struct nft_ctx *ctx); 1094835b8033SPablo Neira Ayuso 109506198b34SEric W. Biederman unsigned int nft_do_chain(struct nft_pktinfo *pkt, void *priv); 109696518518SPatrick McHardy 109796518518SPatrick McHardy /** 109896518518SPatrick McHardy * struct nft_table - nf_tables table 109996518518SPatrick McHardy * 110096518518SPatrick McHardy * @list: used internally 11011b2470e5SFlorian Westphal * @chains_ht: chains in the table 11021b2470e5SFlorian Westphal * @chains: same, for stable walks 110396518518SPatrick McHardy * @sets: sets in the table 1104e5009240SPablo Neira Ayuso * @objects: stateful objects in the table 11053b49e2e9SPablo Neira Ayuso * @flowtables: flow tables in the table 110696518518SPatrick McHardy * @hgenerator: handle generator state 11073ecbfd65SHarsha Sharma * @handle: table handle 110896518518SPatrick McHardy * @use: number of chain references to this table 110996518518SPatrick McHardy * @flags: table flag (see enum nft_table_flags) 1110f2a6d766SPablo Neira Ayuso * @genmask: generation mask 111136596dadSPablo Neira Ayuso * @afinfo: address family info 111296518518SPatrick McHardy * @name: name of the table 111396518518SPatrick McHardy */ 111496518518SPatrick McHardy struct nft_table { 111596518518SPatrick McHardy struct list_head list; 11161b2470e5SFlorian Westphal struct rhltable chains_ht; 111796518518SPatrick McHardy struct list_head chains; 111896518518SPatrick McHardy struct list_head sets; 1119e5009240SPablo Neira Ayuso struct list_head objects; 11203b49e2e9SPablo Neira Ayuso struct list_head flowtables; 112196518518SPatrick McHardy u64 hgenerator; 11223ecbfd65SHarsha Sharma u64 handle; 112396518518SPatrick McHardy u32 use; 112498319cb9SPablo Neira Ayuso u16 family:6, 112598319cb9SPablo Neira Ayuso flags:8, 1126f2a6d766SPablo Neira Ayuso genmask:2; 11276001a930SPablo Neira Ayuso u32 nlpid; 1128e46abbccSPhil Sutter char *name; 11297a81575bSJose M. Guisado Gomez u16 udlen; 11307a81575bSJose M. Guisado Gomez u8 *udata; 1131ebddf1a8SPablo Neira Ayuso }; 1132ebddf1a8SPablo Neira Ayuso 11336001a930SPablo Neira Ayuso static inline bool nft_table_has_owner(const struct nft_table *table) 11346001a930SPablo Neira Ayuso { 11356001a930SPablo Neira Ayuso return table->flags & NFT_TABLE_F_OWNER; 11366001a930SPablo Neira Ayuso } 11376001a930SPablo Neira Ayuso 1138d3519cb8SPablo Neira Ayuso static inline bool nft_base_chain_netdev(int family, u32 hooknum) 1139d3519cb8SPablo Neira Ayuso { 1140d3519cb8SPablo Neira Ayuso return family == NFPROTO_NETDEV || 1141d3519cb8SPablo Neira Ayuso (family == NFPROTO_INET && hooknum == NF_INET_INGRESS); 1142d3519cb8SPablo Neira Ayuso } 1143d3519cb8SPablo Neira Ayuso 1144cc07eeb0SPablo Neira Ayuso void nft_register_chain_type(const struct nft_chain_type *); 114532537e91SPablo Neira Ayuso void nft_unregister_chain_type(const struct nft_chain_type *); 114696518518SPatrick McHardy 11475eccdfaaSJoe Perches int nft_register_expr(struct nft_expr_type *); 11485eccdfaaSJoe Perches void nft_unregister_expr(struct nft_expr_type *); 114996518518SPatrick McHardy 115033d5a7b1SFlorian Westphal int nft_verdict_dump(struct sk_buff *skb, int type, 115133d5a7b1SFlorian Westphal const struct nft_verdict *v); 115233d5a7b1SFlorian Westphal 115333d5a7b1SFlorian Westphal /** 1154d152159bSFlorian Westphal * struct nft_object_hash_key - key to lookup nft_object 1155d152159bSFlorian Westphal * 1156d152159bSFlorian Westphal * @name: name of the stateful object to look up 1157d152159bSFlorian Westphal * @table: table the object belongs to 1158d152159bSFlorian Westphal */ 1159d152159bSFlorian Westphal struct nft_object_hash_key { 1160d152159bSFlorian Westphal const char *name; 1161d152159bSFlorian Westphal const struct nft_table *table; 1162d152159bSFlorian Westphal }; 1163d152159bSFlorian Westphal 1164d152159bSFlorian Westphal /** 1165e5009240SPablo Neira Ayuso * struct nft_object - nf_tables stateful object 1166e5009240SPablo Neira Ayuso * 1167e5009240SPablo Neira Ayuso * @list: table stateful object list node 1168d152159bSFlorian Westphal * @key: keys that identify this object 11694d44175aSFlorian Westphal * @rhlhead: nft_objname_ht node 1170e5009240SPablo Neira Ayuso * @genmask: generation mask 1171e5009240SPablo Neira Ayuso * @use: number of references to this stateful object 11723ecbfd65SHarsha Sharma * @handle: unique object handle 1173dfc46034SPablo M. Bermudo Garay * @ops: object operations 11743ecbfd65SHarsha Sharma * @data: object data, layout depends on type 1175e5009240SPablo Neira Ayuso */ 1176e5009240SPablo Neira Ayuso struct nft_object { 1177e5009240SPablo Neira Ayuso struct list_head list; 11784d44175aSFlorian Westphal struct rhlist_head rhlhead; 1179d152159bSFlorian Westphal struct nft_object_hash_key key; 1180e5009240SPablo Neira Ayuso u32 genmask:2, 1181e5009240SPablo Neira Ayuso use:30; 11823ecbfd65SHarsha Sharma u64 handle; 1183b131c964SJose M. Guisado Gomez u16 udlen; 1184b131c964SJose M. Guisado Gomez u8 *udata; 1185e5009240SPablo Neira Ayuso /* runtime data below here */ 1186dfc46034SPablo M. Bermudo Garay const struct nft_object_ops *ops ____cacheline_aligned; 1187e5009240SPablo Neira Ayuso unsigned char data[] 1188e5009240SPablo Neira Ayuso __attribute__((aligned(__alignof__(u64)))); 1189e5009240SPablo Neira Ayuso }; 1190e5009240SPablo Neira Ayuso 1191e5009240SPablo Neira Ayuso static inline void *nft_obj_data(const struct nft_object *obj) 1192e5009240SPablo Neira Ayuso { 1193e5009240SPablo Neira Ayuso return (void *)obj->data; 1194e5009240SPablo Neira Ayuso } 1195e5009240SPablo Neira Ayuso 1196e5009240SPablo Neira Ayuso #define nft_expr_obj(expr) *((struct nft_object **)nft_expr_priv(expr)) 1197e5009240SPablo Neira Ayuso 11984d44175aSFlorian Westphal struct nft_object *nft_obj_lookup(const struct net *net, 11994d44175aSFlorian Westphal const struct nft_table *table, 1200e5009240SPablo Neira Ayuso const struct nlattr *nla, u32 objtype, 1201e5009240SPablo Neira Ayuso u8 genmask); 1202e5009240SPablo Neira Ayuso 1203d152159bSFlorian Westphal void nft_obj_notify(struct net *net, const struct nft_table *table, 12042599e989SPablo Neira Ayuso struct nft_object *obj, u32 portid, u32 seq, 12052599e989SPablo Neira Ayuso int event, int family, int report, gfp_t gfp); 12062599e989SPablo Neira Ayuso 1207e5009240SPablo Neira Ayuso /** 1208e5009240SPablo Neira Ayuso * struct nft_object_type - stateful object type 1209e5009240SPablo Neira Ayuso * 1210dfc46034SPablo M. Bermudo Garay * @select_ops: function to select nft_object_ops 1211dfc46034SPablo M. Bermudo Garay * @ops: default ops, used when no select_ops functions is present 1212e5009240SPablo Neira Ayuso * @list: list node in list of object types 1213e5009240SPablo Neira Ayuso * @type: stateful object numeric type 1214e5009240SPablo Neira Ayuso * @owner: module owner 1215e5009240SPablo Neira Ayuso * @maxattr: maximum netlink attribute 1216e5009240SPablo Neira Ayuso * @policy: netlink attribute policy 1217dfc46034SPablo M. Bermudo Garay */ 1218dfc46034SPablo M. Bermudo Garay struct nft_object_type { 1219dfc46034SPablo M. Bermudo Garay const struct nft_object_ops *(*select_ops)(const struct nft_ctx *, 1220dfc46034SPablo M. Bermudo Garay const struct nlattr * const tb[]); 1221dfc46034SPablo M. Bermudo Garay const struct nft_object_ops *ops; 1222dfc46034SPablo M. Bermudo Garay struct list_head list; 1223dfc46034SPablo M. Bermudo Garay u32 type; 1224dfc46034SPablo M. Bermudo Garay unsigned int maxattr; 1225dfc46034SPablo M. Bermudo Garay struct module *owner; 1226dfc46034SPablo M. Bermudo Garay const struct nla_policy *policy; 1227dfc46034SPablo M. Bermudo Garay }; 1228dfc46034SPablo M. Bermudo Garay 1229dfc46034SPablo M. Bermudo Garay /** 1230dfc46034SPablo M. Bermudo Garay * struct nft_object_ops - stateful object operations 1231dfc46034SPablo M. Bermudo Garay * 1232dfc46034SPablo M. Bermudo Garay * @eval: stateful object evaluation function 1233dfc46034SPablo M. Bermudo Garay * @size: stateful object size 1234e5009240SPablo Neira Ayuso * @init: initialize object from netlink attributes 1235e5009240SPablo Neira Ayuso * @destroy: release existing stateful object 1236e5009240SPablo Neira Ayuso * @dump: netlink dump stateful object 1237d62d0ba9SFernando Fernandez Mancera * @update: update stateful object 1238e5009240SPablo Neira Ayuso */ 1239dfc46034SPablo M. Bermudo Garay struct nft_object_ops { 1240e5009240SPablo Neira Ayuso void (*eval)(struct nft_object *obj, 1241e5009240SPablo Neira Ayuso struct nft_regs *regs, 1242e5009240SPablo Neira Ayuso const struct nft_pktinfo *pkt); 1243e5009240SPablo Neira Ayuso unsigned int size; 124484fba055SFlorian Westphal int (*init)(const struct nft_ctx *ctx, 124584fba055SFlorian Westphal const struct nlattr *const tb[], 1246e5009240SPablo Neira Ayuso struct nft_object *obj); 124700bfb320SPablo Neira Ayuso void (*destroy)(const struct nft_ctx *ctx, 124800bfb320SPablo Neira Ayuso struct nft_object *obj); 1249e5009240SPablo Neira Ayuso int (*dump)(struct sk_buff *skb, 125043da04a5SPablo Neira Ayuso struct nft_object *obj, 125143da04a5SPablo Neira Ayuso bool reset); 1252d62d0ba9SFernando Fernandez Mancera void (*update)(struct nft_object *obj, 1253d62d0ba9SFernando Fernandez Mancera struct nft_object *newobj); 1254dfc46034SPablo M. Bermudo Garay const struct nft_object_type *type; 1255e5009240SPablo Neira Ayuso }; 1256e5009240SPablo Neira Ayuso 1257e5009240SPablo Neira Ayuso int nft_register_obj(struct nft_object_type *obj_type); 1258e5009240SPablo Neira Ayuso void nft_unregister_obj(struct nft_object_type *obj_type); 1259e5009240SPablo Neira Ayuso 1260cb662ac6SPablo Neira Ayuso #define NFT_NETDEVICE_MAX 256 1261d92191aaSPablo Neira Ayuso 1262e5009240SPablo Neira Ayuso /** 12633b49e2e9SPablo Neira Ayuso * struct nft_flowtable - nf_tables flow table 12643b49e2e9SPablo Neira Ayuso * 12653b49e2e9SPablo Neira Ayuso * @list: flow table list node in table list 12663b49e2e9SPablo Neira Ayuso * @table: the table the flow table is contained in 12673b49e2e9SPablo Neira Ayuso * @name: name of this flow table 12683b49e2e9SPablo Neira Ayuso * @hooknum: hook number 12693b49e2e9SPablo Neira Ayuso * @ops_len: number of hooks in array 12703b49e2e9SPablo Neira Ayuso * @genmask: generation mask 12713b49e2e9SPablo Neira Ayuso * @use: number of references to this flow table 12723ecbfd65SHarsha Sharma * @handle: unique object handle 1273d92191aaSPablo Neira Ayuso * @dev_name: array of device names 12743b49e2e9SPablo Neira Ayuso * @data: rhashtable and garbage collector 12753b49e2e9SPablo Neira Ayuso * @ops: array of hooks 12763b49e2e9SPablo Neira Ayuso */ 12773b49e2e9SPablo Neira Ayuso struct nft_flowtable { 12783b49e2e9SPablo Neira Ayuso struct list_head list; 12793b49e2e9SPablo Neira Ayuso struct nft_table *table; 12803b49e2e9SPablo Neira Ayuso char *name; 12813b49e2e9SPablo Neira Ayuso int hooknum; 12823b49e2e9SPablo Neira Ayuso int ops_len; 12833b49e2e9SPablo Neira Ayuso u32 genmask:2, 12843b49e2e9SPablo Neira Ayuso use:30; 12853ecbfd65SHarsha Sharma u64 handle; 12863b49e2e9SPablo Neira Ayuso /* runtime data below here */ 12873f0465a9SPablo Neira Ayuso struct list_head hook_list ____cacheline_aligned; 12883b49e2e9SPablo Neira Ayuso struct nf_flowtable data; 12893b49e2e9SPablo Neira Ayuso }; 12903b49e2e9SPablo Neira Ayuso 1291cac20fcdSPablo Neira Ayuso struct nft_flowtable *nft_flowtable_lookup(const struct nft_table *table, 12923b49e2e9SPablo Neira Ayuso const struct nlattr *nla, 12933b49e2e9SPablo Neira Ayuso u8 genmask); 12943b49e2e9SPablo Neira Ayuso 12959b05b6e1SLaura Garcia Liebana void nf_tables_deactivate_flowtable(const struct nft_ctx *ctx, 12969b05b6e1SLaura Garcia Liebana struct nft_flowtable *flowtable, 12979b05b6e1SLaura Garcia Liebana enum nft_trans_phase phase); 12989b05b6e1SLaura Garcia Liebana 12993b49e2e9SPablo Neira Ayuso void nft_register_flowtable_type(struct nf_flowtable_type *type); 13003b49e2e9SPablo Neira Ayuso void nft_unregister_flowtable_type(struct nf_flowtable_type *type); 13013b49e2e9SPablo Neira Ayuso 13023b49e2e9SPablo Neira Ayuso /** 130333d5a7b1SFlorian Westphal * struct nft_traceinfo - nft tracing information and state 130433d5a7b1SFlorian Westphal * 130533d5a7b1SFlorian Westphal * @pkt: pktinfo currently processed 130633d5a7b1SFlorian Westphal * @basechain: base chain currently processed 130733d5a7b1SFlorian Westphal * @chain: chain currently processed 130833d5a7b1SFlorian Westphal * @rule: rule that was evaluated 130933d5a7b1SFlorian Westphal * @verdict: verdict given by rule 131033d5a7b1SFlorian Westphal * @type: event type (enum nft_trace_types) 131133d5a7b1SFlorian Westphal * @packet_dumped: packet headers sent in a previous traceinfo message 131233d5a7b1SFlorian Westphal * @trace: other struct members are initialised 131333d5a7b1SFlorian Westphal */ 131433d5a7b1SFlorian Westphal struct nft_traceinfo { 131533d5a7b1SFlorian Westphal const struct nft_pktinfo *pkt; 131633d5a7b1SFlorian Westphal const struct nft_base_chain *basechain; 131733d5a7b1SFlorian Westphal const struct nft_chain *chain; 131833d5a7b1SFlorian Westphal const struct nft_rule *rule; 131933d5a7b1SFlorian Westphal const struct nft_verdict *verdict; 132033d5a7b1SFlorian Westphal enum nft_trace_types type; 132133d5a7b1SFlorian Westphal bool packet_dumped; 132233d5a7b1SFlorian Westphal bool trace; 132333d5a7b1SFlorian Westphal }; 132433d5a7b1SFlorian Westphal 132533d5a7b1SFlorian Westphal void nft_trace_init(struct nft_traceinfo *info, const struct nft_pktinfo *pkt, 132633d5a7b1SFlorian Westphal const struct nft_verdict *verdict, 132733d5a7b1SFlorian Westphal const struct nft_chain *basechain); 132833d5a7b1SFlorian Westphal 132933d5a7b1SFlorian Westphal void nft_trace_notify(struct nft_traceinfo *info); 133033d5a7b1SFlorian Westphal 13319370761cSPablo Neira Ayuso #define MODULE_ALIAS_NFT_CHAIN(family, name) \ 13329370761cSPablo Neira Ayuso MODULE_ALIAS("nft-chain-" __stringify(family) "-" name) 133396518518SPatrick McHardy 133464d46806SPatrick McHardy #define MODULE_ALIAS_NFT_AF_EXPR(family, name) \ 133564d46806SPatrick McHardy MODULE_ALIAS("nft-expr-" __stringify(family) "-" name) 133664d46806SPatrick McHardy 133796518518SPatrick McHardy #define MODULE_ALIAS_NFT_EXPR(name) \ 133896518518SPatrick McHardy MODULE_ALIAS("nft-expr-" name) 133996518518SPatrick McHardy 1340e5009240SPablo Neira Ayuso #define MODULE_ALIAS_NFT_OBJ(type) \ 1341e5009240SPablo Neira Ayuso MODULE_ALIAS("nft-obj-" __stringify(type)) 1342e5009240SPablo Neira Ayuso 134347e640afSJeremy Sowden #if IS_ENABLED(CONFIG_NF_TABLES) 134447e640afSJeremy Sowden 1345ea4bd995SPatrick McHardy /* 1346ea4bd995SPatrick McHardy * The gencursor defines two generations, the currently active and the 1347ea4bd995SPatrick McHardy * next one. Objects contain a bitmask of 2 bits specifying the generations 1348ea4bd995SPatrick McHardy * they're active in. A set bit means they're inactive in the generation 1349ea4bd995SPatrick McHardy * represented by that bit. 1350ea4bd995SPatrick McHardy * 1351ea4bd995SPatrick McHardy * New objects start out as inactive in the current and active in the 1352ea4bd995SPatrick McHardy * next generation. When committing the ruleset the bitmask is cleared, 1353ea4bd995SPatrick McHardy * meaning they're active in all generations. When removing an object, 1354ea4bd995SPatrick McHardy * it is set inactive in the next generation. After committing the ruleset, 1355ea4bd995SPatrick McHardy * the objects are removed. 1356ea4bd995SPatrick McHardy */ 1357ea4bd995SPatrick McHardy static inline unsigned int nft_gencursor_next(const struct net *net) 1358ea4bd995SPatrick McHardy { 1359ea4bd995SPatrick McHardy return net->nft.gencursor + 1 == 1 ? 1 : 0; 1360ea4bd995SPatrick McHardy } 1361ea4bd995SPatrick McHardy 1362ea4bd995SPatrick McHardy static inline u8 nft_genmask_next(const struct net *net) 1363ea4bd995SPatrick McHardy { 1364ea4bd995SPatrick McHardy return 1 << nft_gencursor_next(net); 1365ea4bd995SPatrick McHardy } 1366ea4bd995SPatrick McHardy 1367ea4bd995SPatrick McHardy static inline u8 nft_genmask_cur(const struct net *net) 1368ea4bd995SPatrick McHardy { 136914cd5d4aSMark Rutland /* Use READ_ONCE() to prevent refetching the value for atomicity */ 137014cd5d4aSMark Rutland return 1 << READ_ONCE(net->nft.gencursor); 1371ea4bd995SPatrick McHardy } 1372ea4bd995SPatrick McHardy 137322fe54d5SPatrick McHardy #define NFT_GENMASK_ANY ((1 << 0) | (1 << 1)) 137422fe54d5SPatrick McHardy 1375cc02e457SPatrick McHardy /* 1376889f7ee7SPablo Neira Ayuso * Generic transaction helpers 1377889f7ee7SPablo Neira Ayuso */ 1378889f7ee7SPablo Neira Ayuso 1379889f7ee7SPablo Neira Ayuso /* Check if this object is currently active. */ 1380889f7ee7SPablo Neira Ayuso #define nft_is_active(__net, __obj) \ 1381889f7ee7SPablo Neira Ayuso (((__obj)->genmask & nft_genmask_cur(__net)) == 0) 1382889f7ee7SPablo Neira Ayuso 1383889f7ee7SPablo Neira Ayuso /* Check if this object is active in the next generation. */ 1384889f7ee7SPablo Neira Ayuso #define nft_is_active_next(__net, __obj) \ 1385889f7ee7SPablo Neira Ayuso (((__obj)->genmask & nft_genmask_next(__net)) == 0) 1386889f7ee7SPablo Neira Ayuso 1387889f7ee7SPablo Neira Ayuso /* This object becomes active in the next generation. */ 1388889f7ee7SPablo Neira Ayuso #define nft_activate_next(__net, __obj) \ 1389889f7ee7SPablo Neira Ayuso (__obj)->genmask = nft_genmask_cur(__net) 1390889f7ee7SPablo Neira Ayuso 1391889f7ee7SPablo Neira Ayuso /* This object becomes inactive in the next generation. */ 1392889f7ee7SPablo Neira Ayuso #define nft_deactivate_next(__net, __obj) \ 1393889f7ee7SPablo Neira Ayuso (__obj)->genmask = nft_genmask_next(__net) 1394889f7ee7SPablo Neira Ayuso 1395889f7ee7SPablo Neira Ayuso /* After committing the ruleset, clear the stale generation bit. */ 1396889f7ee7SPablo Neira Ayuso #define nft_clear(__net, __obj) \ 1397889f7ee7SPablo Neira Ayuso (__obj)->genmask &= ~nft_genmask_next(__net) 1398f2a6d766SPablo Neira Ayuso #define nft_active_genmask(__obj, __genmask) \ 1399f2a6d766SPablo Neira Ayuso !((__obj)->genmask & __genmask) 1400889f7ee7SPablo Neira Ayuso 1401889f7ee7SPablo Neira Ayuso /* 1402cc02e457SPatrick McHardy * Set element transaction helpers 1403cc02e457SPatrick McHardy */ 1404cc02e457SPatrick McHardy 1405cc02e457SPatrick McHardy static inline bool nft_set_elem_active(const struct nft_set_ext *ext, 1406cc02e457SPatrick McHardy u8 genmask) 1407cc02e457SPatrick McHardy { 1408cc02e457SPatrick McHardy return !(ext->genmask & genmask); 1409cc02e457SPatrick McHardy } 1410cc02e457SPatrick McHardy 141142a55769SPablo Neira Ayuso static inline void nft_set_elem_change_active(const struct net *net, 141242a55769SPablo Neira Ayuso const struct nft_set *set, 1413cc02e457SPatrick McHardy struct nft_set_ext *ext) 1414cc02e457SPatrick McHardy { 141542a55769SPablo Neira Ayuso ext->genmask ^= nft_genmask_next(net); 1416cc02e457SPatrick McHardy } 1417cc02e457SPatrick McHardy 141847e640afSJeremy Sowden #endif /* IS_ENABLED(CONFIG_NF_TABLES) */ 141947e640afSJeremy Sowden 142069086658SPatrick McHardy /* 142169086658SPatrick McHardy * We use a free bit in the genmask field to indicate the element 142269086658SPatrick McHardy * is busy, meaning it is currently being processed either by 142369086658SPatrick McHardy * the netlink API or GC. 142469086658SPatrick McHardy * 142569086658SPatrick McHardy * Even though the genmask is only a single byte wide, this works 142669086658SPatrick McHardy * because the extension structure if fully constant once initialized, 142769086658SPatrick McHardy * so there are no non-atomic write accesses unless it is already 142869086658SPatrick McHardy * marked busy. 142969086658SPatrick McHardy */ 143069086658SPatrick McHardy #define NFT_SET_ELEM_BUSY_MASK (1 << 2) 143169086658SPatrick McHardy 143269086658SPatrick McHardy #if defined(__LITTLE_ENDIAN_BITFIELD) 143369086658SPatrick McHardy #define NFT_SET_ELEM_BUSY_BIT 2 143469086658SPatrick McHardy #elif defined(__BIG_ENDIAN_BITFIELD) 143569086658SPatrick McHardy #define NFT_SET_ELEM_BUSY_BIT (BITS_PER_LONG - BITS_PER_BYTE + 2) 143669086658SPatrick McHardy #else 143769086658SPatrick McHardy #error 143869086658SPatrick McHardy #endif 143969086658SPatrick McHardy 144069086658SPatrick McHardy static inline int nft_set_elem_mark_busy(struct nft_set_ext *ext) 144169086658SPatrick McHardy { 144269086658SPatrick McHardy unsigned long *word = (unsigned long *)ext; 144369086658SPatrick McHardy 144469086658SPatrick McHardy BUILD_BUG_ON(offsetof(struct nft_set_ext, genmask) != 0); 144569086658SPatrick McHardy return test_and_set_bit(NFT_SET_ELEM_BUSY_BIT, word); 144669086658SPatrick McHardy } 144769086658SPatrick McHardy 144869086658SPatrick McHardy static inline void nft_set_elem_clear_busy(struct nft_set_ext *ext) 144969086658SPatrick McHardy { 145069086658SPatrick McHardy unsigned long *word = (unsigned long *)ext; 145169086658SPatrick McHardy 145269086658SPatrick McHardy clear_bit(NFT_SET_ELEM_BUSY_BIT, word); 145369086658SPatrick McHardy } 145469086658SPatrick McHardy 14551a1e1a12SPatrick McHardy /** 14561a1e1a12SPatrick McHardy * struct nft_trans - nf_tables object update in transaction 14571a1e1a12SPatrick McHardy * 14581a1e1a12SPatrick McHardy * @list: used internally 14591a1e1a12SPatrick McHardy * @msg_type: message type 14600935d558SFlorian Westphal * @put_net: ctx->net needs to be put 14611a1e1a12SPatrick McHardy * @ctx: transaction context 14621a1e1a12SPatrick McHardy * @data: internal information related to the transaction 14631a1e1a12SPatrick McHardy */ 14641a1e1a12SPatrick McHardy struct nft_trans { 14651a1e1a12SPatrick McHardy struct list_head list; 14661a1e1a12SPatrick McHardy int msg_type; 14670935d558SFlorian Westphal bool put_net; 14681a1e1a12SPatrick McHardy struct nft_ctx ctx; 14696daf1414SGustavo A. R. Silva char data[]; 14701a1e1a12SPatrick McHardy }; 14711a1e1a12SPatrick McHardy 14721a1e1a12SPatrick McHardy struct nft_trans_rule { 14731a1e1a12SPatrick McHardy struct nft_rule *rule; 1474c9626a2cSPablo Neira Ayuso struct nft_flow_rule *flow; 14751a94e38dSPablo Neira Ayuso u32 rule_id; 14761a1e1a12SPatrick McHardy }; 14771a1e1a12SPatrick McHardy 14781a1e1a12SPatrick McHardy #define nft_trans_rule(trans) \ 14791a1e1a12SPatrick McHardy (((struct nft_trans_rule *)trans->data)->rule) 1480c9626a2cSPablo Neira Ayuso #define nft_trans_flow_rule(trans) \ 1481c9626a2cSPablo Neira Ayuso (((struct nft_trans_rule *)trans->data)->flow) 14821a94e38dSPablo Neira Ayuso #define nft_trans_rule_id(trans) \ 14831a94e38dSPablo Neira Ayuso (((struct nft_trans_rule *)trans->data)->rule_id) 14841a1e1a12SPatrick McHardy 14851a1e1a12SPatrick McHardy struct nft_trans_set { 14861a1e1a12SPatrick McHardy struct nft_set *set; 14871a1e1a12SPatrick McHardy u32 set_id; 14886a0a8d10SPablo Neira Ayuso bool bound; 14891a1e1a12SPatrick McHardy }; 14901a1e1a12SPatrick McHardy 14911a1e1a12SPatrick McHardy #define nft_trans_set(trans) \ 14921a1e1a12SPatrick McHardy (((struct nft_trans_set *)trans->data)->set) 14931a1e1a12SPatrick McHardy #define nft_trans_set_id(trans) \ 14941a1e1a12SPatrick McHardy (((struct nft_trans_set *)trans->data)->set_id) 14956a0a8d10SPablo Neira Ayuso #define nft_trans_set_bound(trans) \ 14966a0a8d10SPablo Neira Ayuso (((struct nft_trans_set *)trans->data)->bound) 14971a1e1a12SPatrick McHardy 14981a1e1a12SPatrick McHardy struct nft_trans_chain { 14991a1e1a12SPatrick McHardy bool update; 1500b7263e07SPhil Sutter char *name; 15011a1e1a12SPatrick McHardy struct nft_stats __percpu *stats; 15021a1e1a12SPatrick McHardy u8 policy; 150374cccc3dSPablo Neira Ayuso u32 chain_id; 15041a1e1a12SPatrick McHardy }; 15051a1e1a12SPatrick McHardy 15061a1e1a12SPatrick McHardy #define nft_trans_chain_update(trans) \ 15071a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->update) 15081a1e1a12SPatrick McHardy #define nft_trans_chain_name(trans) \ 15091a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->name) 15101a1e1a12SPatrick McHardy #define nft_trans_chain_stats(trans) \ 15111a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->stats) 15121a1e1a12SPatrick McHardy #define nft_trans_chain_policy(trans) \ 15131a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->policy) 151474cccc3dSPablo Neira Ayuso #define nft_trans_chain_id(trans) \ 151574cccc3dSPablo Neira Ayuso (((struct nft_trans_chain *)trans->data)->chain_id) 15161a1e1a12SPatrick McHardy 15171a1e1a12SPatrick McHardy struct nft_trans_table { 15181a1e1a12SPatrick McHardy bool update; 15190ce7cf41SPablo Neira Ayuso u8 state; 15200ce7cf41SPablo Neira Ayuso u32 flags; 15211a1e1a12SPatrick McHardy }; 15221a1e1a12SPatrick McHardy 15231a1e1a12SPatrick McHardy #define nft_trans_table_update(trans) \ 15241a1e1a12SPatrick McHardy (((struct nft_trans_table *)trans->data)->update) 15250ce7cf41SPablo Neira Ayuso #define nft_trans_table_state(trans) \ 15260ce7cf41SPablo Neira Ayuso (((struct nft_trans_table *)trans->data)->state) 15270ce7cf41SPablo Neira Ayuso #define nft_trans_table_flags(trans) \ 15280ce7cf41SPablo Neira Ayuso (((struct nft_trans_table *)trans->data)->flags) 15291a1e1a12SPatrick McHardy 15301a1e1a12SPatrick McHardy struct nft_trans_elem { 15311a1e1a12SPatrick McHardy struct nft_set *set; 15321a1e1a12SPatrick McHardy struct nft_set_elem elem; 15336a0a8d10SPablo Neira Ayuso bool bound; 15341a1e1a12SPatrick McHardy }; 15351a1e1a12SPatrick McHardy 15361a1e1a12SPatrick McHardy #define nft_trans_elem_set(trans) \ 15371a1e1a12SPatrick McHardy (((struct nft_trans_elem *)trans->data)->set) 15381a1e1a12SPatrick McHardy #define nft_trans_elem(trans) \ 15391a1e1a12SPatrick McHardy (((struct nft_trans_elem *)trans->data)->elem) 15406a0a8d10SPablo Neira Ayuso #define nft_trans_elem_set_bound(trans) \ 15416a0a8d10SPablo Neira Ayuso (((struct nft_trans_elem *)trans->data)->bound) 15421a1e1a12SPatrick McHardy 1543e5009240SPablo Neira Ayuso struct nft_trans_obj { 1544e5009240SPablo Neira Ayuso struct nft_object *obj; 1545d62d0ba9SFernando Fernandez Mancera struct nft_object *newobj; 1546d62d0ba9SFernando Fernandez Mancera bool update; 1547e5009240SPablo Neira Ayuso }; 1548e5009240SPablo Neira Ayuso 1549e5009240SPablo Neira Ayuso #define nft_trans_obj(trans) \ 1550e5009240SPablo Neira Ayuso (((struct nft_trans_obj *)trans->data)->obj) 1551d62d0ba9SFernando Fernandez Mancera #define nft_trans_obj_newobj(trans) \ 1552d62d0ba9SFernando Fernandez Mancera (((struct nft_trans_obj *)trans->data)->newobj) 1553d62d0ba9SFernando Fernandez Mancera #define nft_trans_obj_update(trans) \ 1554d62d0ba9SFernando Fernandez Mancera (((struct nft_trans_obj *)trans->data)->update) 1555e5009240SPablo Neira Ayuso 15563b49e2e9SPablo Neira Ayuso struct nft_trans_flowtable { 15573b49e2e9SPablo Neira Ayuso struct nft_flowtable *flowtable; 155878d9f48fSPablo Neira Ayuso bool update; 155978d9f48fSPablo Neira Ayuso struct list_head hook_list; 15607b35582cSPablo Neira Ayuso u32 flags; 15613b49e2e9SPablo Neira Ayuso }; 15623b49e2e9SPablo Neira Ayuso 15633b49e2e9SPablo Neira Ayuso #define nft_trans_flowtable(trans) \ 15643b49e2e9SPablo Neira Ayuso (((struct nft_trans_flowtable *)trans->data)->flowtable) 156578d9f48fSPablo Neira Ayuso #define nft_trans_flowtable_update(trans) \ 156678d9f48fSPablo Neira Ayuso (((struct nft_trans_flowtable *)trans->data)->update) 156778d9f48fSPablo Neira Ayuso #define nft_trans_flowtable_hooks(trans) \ 156878d9f48fSPablo Neira Ayuso (((struct nft_trans_flowtable *)trans->data)->hook_list) 15697b35582cSPablo Neira Ayuso #define nft_trans_flowtable_flags(trans) \ 15707b35582cSPablo Neira Ayuso (((struct nft_trans_flowtable *)trans->data)->flags) 15713b49e2e9SPablo Neira Ayuso 157202c7b25eSPablo Neira Ayuso int __init nft_chain_filter_init(void); 1573d209df3eSFlorian Westphal void nft_chain_filter_fini(void); 157402c7b25eSPablo Neira Ayuso 1575c1deb065SFlorian Westphal void __init nft_chain_route_init(void); 1576c1deb065SFlorian Westphal void nft_chain_route_fini(void); 1577ffe8923fSFlorian Westphal 1578ffe8923fSFlorian Westphal void nf_tables_trans_destroy_flush_work(void); 1579917d80d3SPablo Neira Ayuso 1580917d80d3SPablo Neira Ayuso int nf_msecs_to_jiffies64(const struct nlattr *nla, u64 *result); 1581917d80d3SPablo Neira Ayuso __be64 nf_jiffies64_to_msecs(u64 input); 1582917d80d3SPablo Neira Ayuso 1583cefa31a9SFlorian Westphal #ifdef CONFIG_MODULES 1584cefa31a9SFlorian Westphal __printf(2, 3) int nft_request_module(struct net *net, const char *fmt, ...); 1585cefa31a9SFlorian Westphal #else 1586cefa31a9SFlorian Westphal static inline int nft_request_module(struct net *net, const char *fmt, ...) { return -ENOENT; } 1587cefa31a9SFlorian Westphal #endif 15880854db2aSFlorian Westphal 15890854db2aSFlorian Westphal struct nftables_pernet { 15900854db2aSFlorian Westphal struct list_head tables; 15910854db2aSFlorian Westphal struct list_head commit_list; 15920854db2aSFlorian Westphal struct list_head module_list; 15930854db2aSFlorian Westphal struct list_head notify_list; 15940854db2aSFlorian Westphal struct mutex commit_mutex; 15950854db2aSFlorian Westphal unsigned int base_seq; 15960854db2aSFlorian Westphal u8 validate_state; 15970854db2aSFlorian Westphal }; 15980854db2aSFlorian Westphal 1599d59d2f82SPablo Neira Ayuso extern unsigned int nf_tables_net_id; 1600d59d2f82SPablo Neira Ayuso 1601d59d2f82SPablo Neira Ayuso static inline struct nftables_pernet *nft_pernet(const struct net *net) 1602d59d2f82SPablo Neira Ayuso { 1603d59d2f82SPablo Neira Ayuso return net_generic(net, nf_tables_net_id); 1604d59d2f82SPablo Neira Ayuso } 1605d59d2f82SPablo Neira Ayuso 160696518518SPatrick McHardy #endif /* _NET_NF_TABLES_H */ 1607