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 50b2d8a7bSPatrick McHardy #include <linux/module.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> 1596518518SPatrick McHardy 1620a69341SPatrick McHardy #define NFT_JUMP_STACK_SIZE 16 1720a69341SPatrick McHardy 1896518518SPatrick McHardy struct nft_pktinfo { 1996518518SPatrick McHardy struct sk_buff *skb; 20beac5afaSPablo Neira Ayuso bool tprot_set; 214566bf27SPatrick McHardy u8 tprot; 220ca743a5SPablo Neira Ayuso /* for x_tables compatibility */ 230ca743a5SPablo Neira Ayuso struct xt_action_param xt; 2496518518SPatrick McHardy }; 2596518518SPatrick McHardy 260e5a1c7eSPablo Neira Ayuso static inline struct net *nft_net(const struct nft_pktinfo *pkt) 270e5a1c7eSPablo Neira Ayuso { 280e5a1c7eSPablo Neira Ayuso return pkt->xt.state->net; 290e5a1c7eSPablo Neira Ayuso } 300e5a1c7eSPablo Neira Ayuso 310e5a1c7eSPablo Neira Ayuso static inline unsigned int nft_hook(const struct nft_pktinfo *pkt) 320e5a1c7eSPablo Neira Ayuso { 330e5a1c7eSPablo Neira Ayuso return pkt->xt.state->hook; 340e5a1c7eSPablo Neira Ayuso } 350e5a1c7eSPablo Neira Ayuso 360e5a1c7eSPablo Neira Ayuso static inline u8 nft_pf(const struct nft_pktinfo *pkt) 370e5a1c7eSPablo Neira Ayuso { 380e5a1c7eSPablo Neira Ayuso return pkt->xt.state->pf; 390e5a1c7eSPablo Neira Ayuso } 400e5a1c7eSPablo Neira Ayuso 410e5a1c7eSPablo Neira Ayuso static inline const struct net_device *nft_in(const struct nft_pktinfo *pkt) 420e5a1c7eSPablo Neira Ayuso { 430e5a1c7eSPablo Neira Ayuso return pkt->xt.state->in; 440e5a1c7eSPablo Neira Ayuso } 450e5a1c7eSPablo Neira Ayuso 460e5a1c7eSPablo Neira Ayuso static inline const struct net_device *nft_out(const struct nft_pktinfo *pkt) 470e5a1c7eSPablo Neira Ayuso { 480e5a1c7eSPablo Neira Ayuso return pkt->xt.state->out; 490e5a1c7eSPablo Neira Ayuso } 500e5a1c7eSPablo Neira Ayuso 510ca743a5SPablo Neira Ayuso static inline void nft_set_pktinfo(struct nft_pktinfo *pkt, 520ca743a5SPablo Neira Ayuso struct sk_buff *skb, 53073bfd56SDavid S. Miller const struct nf_hook_state *state) 540ca743a5SPablo Neira Ayuso { 550ca743a5SPablo Neira Ayuso pkt->skb = skb; 56613dbd95SPablo Neira Ayuso pkt->xt.state = state; 570ca743a5SPablo Neira Ayuso } 580ca743a5SPablo Neira Ayuso 597a4473a3SPablo Neira Ayuso static inline void nft_set_pktinfo_unspec(struct nft_pktinfo *pkt, 60beac5afaSPablo Neira Ayuso struct sk_buff *skb) 61beac5afaSPablo Neira Ayuso { 62beac5afaSPablo Neira Ayuso pkt->tprot_set = false; 63beac5afaSPablo Neira Ayuso pkt->tprot = 0; 64beac5afaSPablo Neira Ayuso pkt->xt.thoff = 0; 65beac5afaSPablo Neira Ayuso pkt->xt.fragoff = 0; 66beac5afaSPablo Neira Ayuso } 67beac5afaSPablo Neira Ayuso 68a55e22e9SPatrick McHardy /** 69a55e22e9SPatrick McHardy * struct nft_verdict - nf_tables verdict 70a55e22e9SPatrick McHardy * 71a55e22e9SPatrick McHardy * @code: nf_tables/netfilter verdict code 72a55e22e9SPatrick McHardy * @chain: destination chain for NFT_JUMP/NFT_GOTO 73a55e22e9SPatrick McHardy */ 74a55e22e9SPatrick McHardy struct nft_verdict { 75a55e22e9SPatrick McHardy u32 code; 76a55e22e9SPatrick McHardy struct nft_chain *chain; 77a55e22e9SPatrick McHardy }; 78a55e22e9SPatrick McHardy 7996518518SPatrick McHardy struct nft_data { 8096518518SPatrick McHardy union { 8196518518SPatrick McHardy u32 data[4]; 821ca2e170SPatrick McHardy struct nft_verdict verdict; 8396518518SPatrick McHardy }; 8496518518SPatrick McHardy } __attribute__((aligned(__alignof__(u64)))); 8596518518SPatrick McHardy 86a55e22e9SPatrick McHardy /** 87a55e22e9SPatrick McHardy * struct nft_regs - nf_tables register set 88a55e22e9SPatrick McHardy * 89a55e22e9SPatrick McHardy * @data: data registers 90a55e22e9SPatrick McHardy * @verdict: verdict register 91a55e22e9SPatrick McHardy * 92a55e22e9SPatrick McHardy * The first four data registers alias to the verdict register. 93a55e22e9SPatrick McHardy */ 94a55e22e9SPatrick McHardy struct nft_regs { 95a55e22e9SPatrick McHardy union { 9649499c3eSPatrick McHardy u32 data[20]; 97a55e22e9SPatrick McHardy struct nft_verdict verdict; 98a55e22e9SPatrick McHardy }; 99a55e22e9SPatrick McHardy }; 100a55e22e9SPatrick McHardy 10110596608SLiping Zhang /* Store/load an u16 or u8 integer to/from the u32 data register. 10210596608SLiping Zhang * 10310596608SLiping Zhang * Note, when using concatenations, register allocation happens at 32-bit 10410596608SLiping Zhang * level. So for store instruction, pad the rest part with zero to avoid 10510596608SLiping Zhang * garbage values. 10610596608SLiping Zhang */ 10710596608SLiping Zhang 10810596608SLiping Zhang static inline void nft_reg_store16(u32 *dreg, u16 val) 10910596608SLiping Zhang { 11010596608SLiping Zhang *dreg = 0; 11110596608SLiping Zhang *(u16 *)dreg = val; 11210596608SLiping Zhang } 11310596608SLiping Zhang 11410596608SLiping Zhang static inline void nft_reg_store8(u32 *dreg, u8 val) 11510596608SLiping Zhang { 11610596608SLiping Zhang *dreg = 0; 11710596608SLiping Zhang *(u8 *)dreg = val; 11810596608SLiping Zhang } 11910596608SLiping Zhang 12010596608SLiping Zhang static inline u16 nft_reg_load16(u32 *sreg) 12110596608SLiping Zhang { 12210596608SLiping Zhang return *(u16 *)sreg; 12310596608SLiping Zhang } 12410596608SLiping Zhang 12510596608SLiping Zhang static inline u8 nft_reg_load8(u32 *sreg) 12610596608SLiping Zhang { 12710596608SLiping Zhang return *(u8 *)sreg; 12810596608SLiping Zhang } 12910596608SLiping Zhang 13049499c3eSPatrick McHardy static inline void nft_data_copy(u32 *dst, const struct nft_data *src, 13149499c3eSPatrick McHardy unsigned int len) 13296518518SPatrick McHardy { 13349499c3eSPatrick McHardy memcpy(dst, src, len); 13496518518SPatrick McHardy } 13596518518SPatrick McHardy 13696518518SPatrick McHardy static inline void nft_data_debug(const struct nft_data *data) 13796518518SPatrick McHardy { 13896518518SPatrick McHardy pr_debug("data[0]=%x data[1]=%x data[2]=%x data[3]=%x\n", 13996518518SPatrick McHardy data->data[0], data->data[1], 14096518518SPatrick McHardy data->data[2], data->data[3]); 14196518518SPatrick McHardy } 14296518518SPatrick McHardy 14396518518SPatrick McHardy /** 14420a69341SPatrick McHardy * struct nft_ctx - nf_tables rule/set context 14596518518SPatrick McHardy * 14699633ab2SPablo Neira Ayuso * @net: net namespace 14796518518SPatrick McHardy * @table: the table the chain is contained in 14896518518SPatrick McHardy * @chain: the chain the rule is contained in 1490ca743a5SPablo Neira Ayuso * @nla: netlink attributes 150128ad332SPablo Neira Ayuso * @portid: netlink portID of the original message 151128ad332SPablo Neira Ayuso * @seq: netlink sequence number 15236596dadSPablo Neira Ayuso * @family: protocol family 15326b2f552STaehee Yoo * @level: depth of the chains 154128ad332SPablo Neira Ayuso * @report: notify via unicast netlink message 15596518518SPatrick McHardy */ 15696518518SPatrick McHardy struct nft_ctx { 15799633ab2SPablo Neira Ayuso struct net *net; 1587c95f6d8SPablo Neira Ayuso struct nft_table *table; 1597c95f6d8SPablo Neira Ayuso struct nft_chain *chain; 1600ca743a5SPablo Neira Ayuso const struct nlattr * const *nla; 161128ad332SPablo Neira Ayuso u32 portid; 162128ad332SPablo Neira Ayuso u32 seq; 16336596dadSPablo Neira Ayuso u8 family; 16426b2f552STaehee Yoo u8 level; 165128ad332SPablo Neira Ayuso bool report; 16696518518SPatrick McHardy }; 16796518518SPatrick McHardy 16896518518SPatrick McHardy struct nft_data_desc { 16996518518SPatrick McHardy enum nft_data_types type; 17096518518SPatrick McHardy unsigned int len; 17196518518SPatrick McHardy }; 17296518518SPatrick McHardy 173d0a11fc3SPatrick McHardy int nft_data_init(const struct nft_ctx *ctx, 174d0a11fc3SPatrick McHardy struct nft_data *data, unsigned int size, 17596518518SPatrick McHardy struct nft_data_desc *desc, const struct nlattr *nla); 176bb7b40aeSPablo Neira Ayuso void nft_data_hold(const struct nft_data *data, enum nft_data_types type); 17759105446SPablo Neira Ayuso void nft_data_release(const struct nft_data *data, enum nft_data_types type); 1785eccdfaaSJoe Perches int nft_data_dump(struct sk_buff *skb, int attr, const struct nft_data *data, 17996518518SPatrick McHardy enum nft_data_types type, unsigned int len); 18096518518SPatrick McHardy 18196518518SPatrick McHardy static inline enum nft_data_types nft_dreg_to_type(enum nft_registers reg) 18296518518SPatrick McHardy { 18396518518SPatrick McHardy return reg == NFT_REG_VERDICT ? NFT_DATA_VERDICT : NFT_DATA_VALUE; 18496518518SPatrick McHardy } 18596518518SPatrick McHardy 18620a69341SPatrick McHardy static inline enum nft_registers nft_type_to_reg(enum nft_data_types type) 18720a69341SPatrick McHardy { 188bf798657SPablo Neira Ayuso return type == NFT_DATA_VERDICT ? NFT_REG_VERDICT : NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE; 18920a69341SPatrick McHardy } 19020a69341SPatrick McHardy 191f1d505bbSJohn W. Linville int nft_parse_u32_check(const struct nlattr *attr, int max, u32 *dest); 192b1c96ed3SPatrick McHardy unsigned int nft_parse_register(const struct nlattr *attr); 193b1c96ed3SPatrick McHardy int nft_dump_register(struct sk_buff *skb, unsigned int attr, unsigned int reg); 194b1c96ed3SPatrick McHardy 195d07db988SPatrick McHardy int nft_validate_register_load(enum nft_registers reg, unsigned int len); 1961ec10212SPatrick McHardy int nft_validate_register_store(const struct nft_ctx *ctx, 1971ec10212SPatrick McHardy enum nft_registers reg, 19896518518SPatrick McHardy const struct nft_data *data, 19945d9bcdaSPatrick McHardy enum nft_data_types type, unsigned int len); 20096518518SPatrick McHardy 20186f1ec32SPatrick McHardy /** 20286f1ec32SPatrick McHardy * struct nft_userdata - user defined data associated with an object 20386f1ec32SPatrick McHardy * 20486f1ec32SPatrick McHardy * @len: length of the data 20586f1ec32SPatrick McHardy * @data: content 20686f1ec32SPatrick McHardy * 20786f1ec32SPatrick McHardy * The presence of user data is indicated in an object specific fashion, 20886f1ec32SPatrick McHardy * so a length of zero can't occur and the value "len" indicates data 20986f1ec32SPatrick McHardy * of length len + 1. 21086f1ec32SPatrick McHardy */ 21186f1ec32SPatrick McHardy struct nft_userdata { 21286f1ec32SPatrick McHardy u8 len; 21386f1ec32SPatrick McHardy unsigned char data[0]; 21486f1ec32SPatrick McHardy }; 21586f1ec32SPatrick McHardy 21696518518SPatrick McHardy /** 21720a69341SPatrick McHardy * struct nft_set_elem - generic representation of set elements 21820a69341SPatrick McHardy * 21920a69341SPatrick McHardy * @key: element key 220fe2811ebSPatrick McHardy * @priv: element private data and extensions 22120a69341SPatrick McHardy */ 22220a69341SPatrick McHardy struct nft_set_elem { 2237d740264SPatrick McHardy union { 2247d740264SPatrick McHardy u32 buf[NFT_DATA_VALUE_MAXLEN / sizeof(u32)]; 2257d740264SPatrick McHardy struct nft_data val; 2267d740264SPatrick McHardy } key; 227fe2811ebSPatrick McHardy void *priv; 22820a69341SPatrick McHardy }; 22920a69341SPatrick McHardy 23020a69341SPatrick McHardy struct nft_set; 23120a69341SPatrick McHardy struct nft_set_iter { 2328588ac09SPablo Neira Ayuso u8 genmask; 23320a69341SPatrick McHardy unsigned int count; 23420a69341SPatrick McHardy unsigned int skip; 23520a69341SPatrick McHardy int err; 23620a69341SPatrick McHardy int (*fn)(const struct nft_ctx *ctx, 237de70185dSPablo Neira Ayuso struct nft_set *set, 23820a69341SPatrick McHardy const struct nft_set_iter *iter, 239de70185dSPablo Neira Ayuso struct nft_set_elem *elem); 24020a69341SPatrick McHardy }; 24120a69341SPatrick McHardy 24220a69341SPatrick McHardy /** 243c50b960cSPatrick McHardy * struct nft_set_desc - description of set elements 244c50b960cSPatrick McHardy * 245c50b960cSPatrick McHardy * @klen: key length 246c50b960cSPatrick McHardy * @dlen: data length 247c50b960cSPatrick McHardy * @size: number of set elements 248c50b960cSPatrick McHardy */ 249c50b960cSPatrick McHardy struct nft_set_desc { 250c50b960cSPatrick McHardy unsigned int klen; 251c50b960cSPatrick McHardy unsigned int dlen; 252c50b960cSPatrick McHardy unsigned int size; 253c50b960cSPatrick McHardy }; 254c50b960cSPatrick McHardy 255c50b960cSPatrick McHardy /** 256c50b960cSPatrick McHardy * enum nft_set_class - performance class 257c50b960cSPatrick McHardy * 258c50b960cSPatrick McHardy * @NFT_LOOKUP_O_1: constant, O(1) 259c50b960cSPatrick McHardy * @NFT_LOOKUP_O_LOG_N: logarithmic, O(log N) 260c50b960cSPatrick McHardy * @NFT_LOOKUP_O_N: linear, O(N) 261c50b960cSPatrick McHardy */ 262c50b960cSPatrick McHardy enum nft_set_class { 263c50b960cSPatrick McHardy NFT_SET_CLASS_O_1, 264c50b960cSPatrick McHardy NFT_SET_CLASS_O_LOG_N, 265c50b960cSPatrick McHardy NFT_SET_CLASS_O_N, 266c50b960cSPatrick McHardy }; 267c50b960cSPatrick McHardy 268c50b960cSPatrick McHardy /** 269c50b960cSPatrick McHardy * struct nft_set_estimate - estimation of memory and performance 270c50b960cSPatrick McHardy * characteristics 271c50b960cSPatrick McHardy * 272c50b960cSPatrick McHardy * @size: required memory 27355af753cSPablo Neira Ayuso * @lookup: lookup performance class 2740b5a7874SPablo Neira Ayuso * @space: memory class 275c50b960cSPatrick McHardy */ 276c50b960cSPatrick McHardy struct nft_set_estimate { 2774ef360ddSTaehee Yoo u64 size; 27855af753cSPablo Neira Ayuso enum nft_set_class lookup; 2790b5a7874SPablo Neira Ayuso enum nft_set_class space; 280c50b960cSPatrick McHardy }; 281c50b960cSPatrick McHardy 282b2832dd6SPatrick McHardy struct nft_set_ext; 28322fe54d5SPatrick McHardy struct nft_expr; 284b2832dd6SPatrick McHardy 285c50b960cSPatrick McHardy /** 28620a69341SPatrick McHardy * struct nft_set_ops - nf_tables set operations 28720a69341SPatrick McHardy * 28820a69341SPatrick McHardy * @lookup: look up an element within the set 28920a69341SPatrick McHardy * @insert: insert new element into set 290cc02e457SPatrick McHardy * @activate: activate new element in the next generation 2918411b644SPablo Neira Ayuso * @deactivate: lookup for element and deactivate it in the next generation 2921ba1c414SPablo Neira Ayuso * @flush: deactivate element in the next generation 29320a69341SPatrick McHardy * @remove: remove element from set 29420a69341SPatrick McHardy * @walk: iterate over all set elemeennts 295ba0e4d99SPablo Neira Ayuso * @get: get set elements 29620a69341SPatrick McHardy * @privsize: function to return size of set private data 29720a69341SPatrick McHardy * @init: initialize private data of new set instance 29820a69341SPatrick McHardy * @destroy: destroy private data of set instance 299fe2811ebSPatrick McHardy * @elemsize: element private size 30020a69341SPatrick McHardy */ 30120a69341SPatrick McHardy struct nft_set_ops { 30242a55769SPablo Neira Ayuso bool (*lookup)(const struct net *net, 30342a55769SPablo Neira Ayuso const struct nft_set *set, 3048cd8937aSPatrick McHardy const u32 *key, 305b2832dd6SPatrick McHardy const struct nft_set_ext **ext); 30622fe54d5SPatrick McHardy bool (*update)(struct nft_set *set, 3078cd8937aSPatrick McHardy const u32 *key, 30822fe54d5SPatrick McHardy void *(*new)(struct nft_set *, 30922fe54d5SPatrick McHardy const struct nft_expr *, 310a55e22e9SPatrick McHardy struct nft_regs *), 31122fe54d5SPatrick McHardy const struct nft_expr *expr, 312a55e22e9SPatrick McHardy struct nft_regs *regs, 31322fe54d5SPatrick McHardy const struct nft_set_ext **ext); 31422fe54d5SPatrick McHardy 31542a55769SPablo Neira Ayuso int (*insert)(const struct net *net, 31642a55769SPablo Neira Ayuso const struct nft_set *set, 317c016c7e4SPablo Neira Ayuso const struct nft_set_elem *elem, 318c016c7e4SPablo Neira Ayuso struct nft_set_ext **ext); 31942a55769SPablo Neira Ayuso void (*activate)(const struct net *net, 32042a55769SPablo Neira Ayuso const struct nft_set *set, 321cc02e457SPatrick McHardy const struct nft_set_elem *elem); 32242a55769SPablo Neira Ayuso void * (*deactivate)(const struct net *net, 32342a55769SPablo Neira Ayuso const struct nft_set *set, 324cc02e457SPatrick McHardy const struct nft_set_elem *elem); 3251ba1c414SPablo Neira Ayuso bool (*flush)(const struct net *net, 3268411b644SPablo Neira Ayuso const struct nft_set *set, 3278411b644SPablo Neira Ayuso void *priv); 3285cb82a38SPablo Neira Ayuso void (*remove)(const struct net *net, 3295cb82a38SPablo Neira Ayuso const struct nft_set *set, 33020a69341SPatrick McHardy const struct nft_set_elem *elem); 33120a69341SPatrick McHardy void (*walk)(const struct nft_ctx *ctx, 332de70185dSPablo Neira Ayuso struct nft_set *set, 33320a69341SPatrick McHardy struct nft_set_iter *iter); 334ba0e4d99SPablo Neira Ayuso void * (*get)(const struct net *net, 335ba0e4d99SPablo Neira Ayuso const struct nft_set *set, 336ba0e4d99SPablo Neira Ayuso const struct nft_set_elem *elem, 337ba0e4d99SPablo Neira Ayuso unsigned int flags); 33820a69341SPatrick McHardy 3394ef360ddSTaehee Yoo u64 (*privsize)(const struct nlattr * const nla[], 340347b408dSPablo Neira Ayuso const struct nft_set_desc *desc); 341c50b960cSPatrick McHardy bool (*estimate)(const struct nft_set_desc *desc, 342c50b960cSPatrick McHardy u32 features, 343c50b960cSPatrick McHardy struct nft_set_estimate *est); 34420a69341SPatrick McHardy int (*init)(const struct nft_set *set, 345c50b960cSPatrick McHardy const struct nft_set_desc *desc, 34620a69341SPatrick McHardy const struct nlattr * const nla[]); 34720a69341SPatrick McHardy void (*destroy)(const struct nft_set *set); 34879b174adSPablo Neira Ayuso void (*gc_init)(const struct nft_set *set); 34920a69341SPatrick McHardy 350fe2811ebSPatrick McHardy unsigned int elemsize; 35120a69341SPatrick McHardy }; 35220a69341SPatrick McHardy 35371cc0873SPhil Sutter /** 35471cc0873SPhil Sutter * struct nft_set_type - nf_tables set type 35571cc0873SPhil Sutter * 35671cc0873SPhil Sutter * @ops: set ops for this type 35771cc0873SPhil Sutter * @list: used internally 35871cc0873SPhil Sutter * @owner: module reference 35971cc0873SPhil Sutter * @features: features supported by the implementation 36071cc0873SPhil Sutter */ 36171cc0873SPhil Sutter struct nft_set_type { 36271cc0873SPhil Sutter const struct nft_set_ops ops; 36371cc0873SPhil Sutter struct list_head list; 36471cc0873SPhil Sutter struct module *owner; 36571cc0873SPhil Sutter u32 features; 36671cc0873SPhil Sutter }; 36771cc0873SPhil Sutter #define to_set_type(o) container_of(o, struct nft_set_type, ops) 36871cc0873SPhil Sutter 3692b664957SPablo Neira Ayuso int nft_register_set(struct nft_set_type *type); 3702b664957SPablo Neira Ayuso void nft_unregister_set(struct nft_set_type *type); 37120a69341SPatrick McHardy 37220a69341SPatrick McHardy /** 37320a69341SPatrick McHardy * struct nft_set - nf_tables set instance 37420a69341SPatrick McHardy * 37520a69341SPatrick McHardy * @list: table set list node 37620a69341SPatrick McHardy * @bindings: list of set bindings 3773453c927SPablo Neira Ayuso * @table: table this set belongs to 3783453c927SPablo Neira Ayuso * @net: netnamespace this set belongs to 37920a69341SPatrick McHardy * @name: name of the set 3803ecbfd65SHarsha Sharma * @handle: unique handle of the set 38120a69341SPatrick McHardy * @ktype: key type (numeric type defined by userspace, not used in the kernel) 38220a69341SPatrick McHardy * @dtype: data type (verdict or numeric type defined by userspace) 3838aeff920SPablo Neira Ayuso * @objtype: object type (see NFT_OBJECT_* definitions) 384c50b960cSPatrick McHardy * @size: maximum set size 385c50b960cSPatrick McHardy * @nelems: number of elements 3863dd0673aSPatrick McHardy * @ndeact: number of deactivated elements queued for removal 387d3e2a111SAnders K. Pedersen * @timeout: default timeout value in jiffies 388761da293SPatrick McHardy * @gc_int: garbage collection interval in msecs 3899363dc4bSArturo Borrero * @policy: set parameterization (see enum nft_set_policies) 390e6d8ecacSCarlos Falgueras García * @udlen: user data length 391e6d8ecacSCarlos Falgueras García * @udata: user data 39220a69341SPatrick McHardy * @ops: set ops 39320a69341SPatrick McHardy * @flags: set flags 39437a9cc52SPablo Neira Ayuso * @genmask: generation mask 39520a69341SPatrick McHardy * @klen: key length 39620a69341SPatrick McHardy * @dlen: data length 39720a69341SPatrick McHardy * @data: private set data 39820a69341SPatrick McHardy */ 39920a69341SPatrick McHardy struct nft_set { 40020a69341SPatrick McHardy struct list_head list; 40120a69341SPatrick McHardy struct list_head bindings; 4023453c927SPablo Neira Ayuso struct nft_table *table; 4033453c927SPablo Neira Ayuso possible_net_t net; 40438745490SPhil Sutter char *name; 4053ecbfd65SHarsha Sharma u64 handle; 40620a69341SPatrick McHardy u32 ktype; 40720a69341SPatrick McHardy u32 dtype; 4088aeff920SPablo Neira Ayuso u32 objtype; 409c50b960cSPatrick McHardy u32 size; 4103dd0673aSPatrick McHardy atomic_t nelems; 4113dd0673aSPatrick McHardy u32 ndeact; 412761da293SPatrick McHardy u64 timeout; 413761da293SPatrick McHardy u32 gc_int; 4149363dc4bSArturo Borrero u16 policy; 415e6d8ecacSCarlos Falgueras García u16 udlen; 416e6d8ecacSCarlos Falgueras García unsigned char *udata; 41720a69341SPatrick McHardy /* runtime data below here */ 41820a69341SPatrick McHardy const struct nft_set_ops *ops ____cacheline_aligned; 41937a9cc52SPablo Neira Ayuso u16 flags:14, 42037a9cc52SPablo Neira Ayuso genmask:2; 42120a69341SPatrick McHardy u8 klen; 42220a69341SPatrick McHardy u8 dlen; 42320a69341SPatrick McHardy unsigned char data[] 42420a69341SPatrick McHardy __attribute__((aligned(__alignof__(u64)))); 42520a69341SPatrick McHardy }; 42620a69341SPatrick McHardy 427408070d6SPablo Neira Ayuso static inline bool nft_set_is_anonymous(const struct nft_set *set) 428408070d6SPablo Neira Ayuso { 429408070d6SPablo Neira Ayuso return set->flags & NFT_SET_ANONYMOUS; 430408070d6SPablo Neira Ayuso } 431408070d6SPablo Neira Ayuso 43220a69341SPatrick McHardy static inline void *nft_set_priv(const struct nft_set *set) 43320a69341SPatrick McHardy { 43420a69341SPatrick McHardy return (void *)set->data; 43520a69341SPatrick McHardy } 43620a69341SPatrick McHardy 4379d098292SPatrick McHardy static inline struct nft_set *nft_set_container_of(const void *priv) 4389d098292SPatrick McHardy { 4399d098292SPatrick McHardy return (void *)priv - offsetof(struct nft_set, data); 4409d098292SPatrick McHardy } 4419d098292SPatrick McHardy 44210659cbaSPablo Neira Ayuso struct nft_set *nft_set_lookup_global(const struct net *net, 443c7a72e3fSPablo Neira Ayuso const struct nft_table *table, 444c7a72e3fSPablo Neira Ayuso const struct nlattr *nla_set_name, 445c7a72e3fSPablo Neira Ayuso const struct nlattr *nla_set_id, 446c7a72e3fSPablo Neira Ayuso u8 genmask); 44720a69341SPatrick McHardy 448761da293SPatrick McHardy static inline unsigned long nft_set_gc_interval(const struct nft_set *set) 449761da293SPatrick McHardy { 450761da293SPatrick McHardy return set->gc_int ? msecs_to_jiffies(set->gc_int) : HZ; 451761da293SPatrick McHardy } 452761da293SPatrick McHardy 45320a69341SPatrick McHardy /** 45420a69341SPatrick McHardy * struct nft_set_binding - nf_tables set binding 45520a69341SPatrick McHardy * 45620a69341SPatrick McHardy * @list: set bindings list node 45720a69341SPatrick McHardy * @chain: chain containing the rule bound to the set 45811113e19SPatrick McHardy * @flags: set action flags 45920a69341SPatrick McHardy * 46020a69341SPatrick McHardy * A set binding contains all information necessary for validation 46120a69341SPatrick McHardy * of new elements added to a bound set. 46220a69341SPatrick McHardy */ 46320a69341SPatrick McHardy struct nft_set_binding { 46420a69341SPatrick McHardy struct list_head list; 46520a69341SPatrick McHardy const struct nft_chain *chain; 46611113e19SPatrick McHardy u32 flags; 46720a69341SPatrick McHardy }; 46820a69341SPatrick McHardy 4695eccdfaaSJoe Perches int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set, 47020a69341SPatrick McHardy struct nft_set_binding *binding); 4715eccdfaaSJoe Perches void nf_tables_unbind_set(const struct nft_ctx *ctx, struct nft_set *set, 47220a69341SPatrick McHardy struct nft_set_binding *binding); 47320a69341SPatrick McHardy 4743ac4c07aSPatrick McHardy /** 4753ac4c07aSPatrick McHardy * enum nft_set_extensions - set extension type IDs 4763ac4c07aSPatrick McHardy * 4773ac4c07aSPatrick McHardy * @NFT_SET_EXT_KEY: element key 4783ac4c07aSPatrick McHardy * @NFT_SET_EXT_DATA: mapping data 4793ac4c07aSPatrick McHardy * @NFT_SET_EXT_FLAGS: element flags 480c3e1b005SPatrick McHardy * @NFT_SET_EXT_TIMEOUT: element timeout 481c3e1b005SPatrick McHardy * @NFT_SET_EXT_EXPIRATION: element expiration time 48268e942e8SPatrick McHardy * @NFT_SET_EXT_USERDATA: user data associated with the element 483f25ad2e9SPatrick McHardy * @NFT_SET_EXT_EXPR: expression assiociated with the element 4848aeff920SPablo Neira Ayuso * @NFT_SET_EXT_OBJREF: stateful object reference associated with element 4853ac4c07aSPatrick McHardy * @NFT_SET_EXT_NUM: number of extension types 4863ac4c07aSPatrick McHardy */ 4873ac4c07aSPatrick McHardy enum nft_set_extensions { 4883ac4c07aSPatrick McHardy NFT_SET_EXT_KEY, 4893ac4c07aSPatrick McHardy NFT_SET_EXT_DATA, 4903ac4c07aSPatrick McHardy NFT_SET_EXT_FLAGS, 491c3e1b005SPatrick McHardy NFT_SET_EXT_TIMEOUT, 492c3e1b005SPatrick McHardy NFT_SET_EXT_EXPIRATION, 49368e942e8SPatrick McHardy NFT_SET_EXT_USERDATA, 494f25ad2e9SPatrick McHardy NFT_SET_EXT_EXPR, 4958aeff920SPablo Neira Ayuso NFT_SET_EXT_OBJREF, 4963ac4c07aSPatrick McHardy NFT_SET_EXT_NUM 4973ac4c07aSPatrick McHardy }; 4983ac4c07aSPatrick McHardy 4993ac4c07aSPatrick McHardy /** 5003ac4c07aSPatrick McHardy * struct nft_set_ext_type - set extension type 5013ac4c07aSPatrick McHardy * 5023ac4c07aSPatrick McHardy * @len: fixed part length of the extension 5033ac4c07aSPatrick McHardy * @align: alignment requirements of the extension 5043ac4c07aSPatrick McHardy */ 5053ac4c07aSPatrick McHardy struct nft_set_ext_type { 5063ac4c07aSPatrick McHardy u8 len; 5073ac4c07aSPatrick McHardy u8 align; 5083ac4c07aSPatrick McHardy }; 5093ac4c07aSPatrick McHardy 5103ac4c07aSPatrick McHardy extern const struct nft_set_ext_type nft_set_ext_types[]; 5113ac4c07aSPatrick McHardy 5123ac4c07aSPatrick McHardy /** 5133ac4c07aSPatrick McHardy * struct nft_set_ext_tmpl - set extension template 5143ac4c07aSPatrick McHardy * 5153ac4c07aSPatrick McHardy * @len: length of extension area 5163ac4c07aSPatrick McHardy * @offset: offsets of individual extension types 5173ac4c07aSPatrick McHardy */ 5183ac4c07aSPatrick McHardy struct nft_set_ext_tmpl { 5193ac4c07aSPatrick McHardy u16 len; 5203ac4c07aSPatrick McHardy u8 offset[NFT_SET_EXT_NUM]; 5213ac4c07aSPatrick McHardy }; 5223ac4c07aSPatrick McHardy 5233ac4c07aSPatrick McHardy /** 5243ac4c07aSPatrick McHardy * struct nft_set_ext - set extensions 5253ac4c07aSPatrick McHardy * 526cc02e457SPatrick McHardy * @genmask: generation mask 5273ac4c07aSPatrick McHardy * @offset: offsets of individual extension types 5283ac4c07aSPatrick McHardy * @data: beginning of extension data 5293ac4c07aSPatrick McHardy */ 5303ac4c07aSPatrick McHardy struct nft_set_ext { 531cc02e457SPatrick McHardy u8 genmask; 5323ac4c07aSPatrick McHardy u8 offset[NFT_SET_EXT_NUM]; 5333ac4c07aSPatrick McHardy char data[0]; 5343ac4c07aSPatrick McHardy }; 5353ac4c07aSPatrick McHardy 5363ac4c07aSPatrick McHardy static inline void nft_set_ext_prepare(struct nft_set_ext_tmpl *tmpl) 5373ac4c07aSPatrick McHardy { 5383ac4c07aSPatrick McHardy memset(tmpl, 0, sizeof(*tmpl)); 5393ac4c07aSPatrick McHardy tmpl->len = sizeof(struct nft_set_ext); 5403ac4c07aSPatrick McHardy } 5413ac4c07aSPatrick McHardy 5423ac4c07aSPatrick McHardy static inline void nft_set_ext_add_length(struct nft_set_ext_tmpl *tmpl, u8 id, 5433ac4c07aSPatrick McHardy unsigned int len) 5443ac4c07aSPatrick McHardy { 5453ac4c07aSPatrick McHardy tmpl->len = ALIGN(tmpl->len, nft_set_ext_types[id].align); 5463ac4c07aSPatrick McHardy BUG_ON(tmpl->len > U8_MAX); 5473ac4c07aSPatrick McHardy tmpl->offset[id] = tmpl->len; 5483ac4c07aSPatrick McHardy tmpl->len += nft_set_ext_types[id].len + len; 5493ac4c07aSPatrick McHardy } 5503ac4c07aSPatrick McHardy 5513ac4c07aSPatrick McHardy static inline void nft_set_ext_add(struct nft_set_ext_tmpl *tmpl, u8 id) 5523ac4c07aSPatrick McHardy { 5533ac4c07aSPatrick McHardy nft_set_ext_add_length(tmpl, id, 0); 5543ac4c07aSPatrick McHardy } 5553ac4c07aSPatrick McHardy 5563ac4c07aSPatrick McHardy static inline void nft_set_ext_init(struct nft_set_ext *ext, 5573ac4c07aSPatrick McHardy const struct nft_set_ext_tmpl *tmpl) 5583ac4c07aSPatrick McHardy { 5593ac4c07aSPatrick McHardy memcpy(ext->offset, tmpl->offset, sizeof(ext->offset)); 5603ac4c07aSPatrick McHardy } 5613ac4c07aSPatrick McHardy 5623ac4c07aSPatrick McHardy static inline bool __nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) 5633ac4c07aSPatrick McHardy { 5643ac4c07aSPatrick McHardy return !!ext->offset[id]; 5653ac4c07aSPatrick McHardy } 5663ac4c07aSPatrick McHardy 5673ac4c07aSPatrick McHardy static inline bool nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) 5683ac4c07aSPatrick McHardy { 5693ac4c07aSPatrick McHardy return ext && __nft_set_ext_exists(ext, id); 5703ac4c07aSPatrick McHardy } 5713ac4c07aSPatrick McHardy 5723ac4c07aSPatrick McHardy static inline void *nft_set_ext(const struct nft_set_ext *ext, u8 id) 5733ac4c07aSPatrick McHardy { 5743ac4c07aSPatrick McHardy return (void *)ext + ext->offset[id]; 5753ac4c07aSPatrick McHardy } 5763ac4c07aSPatrick McHardy 5773ac4c07aSPatrick McHardy static inline struct nft_data *nft_set_ext_key(const struct nft_set_ext *ext) 5783ac4c07aSPatrick McHardy { 5793ac4c07aSPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_KEY); 5803ac4c07aSPatrick McHardy } 5813ac4c07aSPatrick McHardy 5823ac4c07aSPatrick McHardy static inline struct nft_data *nft_set_ext_data(const struct nft_set_ext *ext) 5833ac4c07aSPatrick McHardy { 5843ac4c07aSPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_DATA); 5853ac4c07aSPatrick McHardy } 5863ac4c07aSPatrick McHardy 5873ac4c07aSPatrick McHardy static inline u8 *nft_set_ext_flags(const struct nft_set_ext *ext) 5883ac4c07aSPatrick McHardy { 5893ac4c07aSPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_FLAGS); 5903ac4c07aSPatrick McHardy } 591ef1f7df9SPatrick McHardy 592c3e1b005SPatrick McHardy static inline u64 *nft_set_ext_timeout(const struct nft_set_ext *ext) 593c3e1b005SPatrick McHardy { 594c3e1b005SPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_TIMEOUT); 595c3e1b005SPatrick McHardy } 596c3e1b005SPatrick McHardy 5978e1102d5SFlorian Westphal static inline u64 *nft_set_ext_expiration(const struct nft_set_ext *ext) 598c3e1b005SPatrick McHardy { 599c3e1b005SPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_EXPIRATION); 600c3e1b005SPatrick McHardy } 601c3e1b005SPatrick McHardy 60268e942e8SPatrick McHardy static inline struct nft_userdata *nft_set_ext_userdata(const struct nft_set_ext *ext) 60368e942e8SPatrick McHardy { 60468e942e8SPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_USERDATA); 60568e942e8SPatrick McHardy } 60668e942e8SPatrick McHardy 607f25ad2e9SPatrick McHardy static inline struct nft_expr *nft_set_ext_expr(const struct nft_set_ext *ext) 608f25ad2e9SPatrick McHardy { 609f25ad2e9SPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_EXPR); 610f25ad2e9SPatrick McHardy } 611f25ad2e9SPatrick McHardy 612c3e1b005SPatrick McHardy static inline bool nft_set_elem_expired(const struct nft_set_ext *ext) 613c3e1b005SPatrick McHardy { 614c3e1b005SPatrick McHardy return nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION) && 6158e1102d5SFlorian Westphal time_is_before_eq_jiffies64(*nft_set_ext_expiration(ext)); 616c3e1b005SPatrick McHardy } 617c3e1b005SPatrick McHardy 618fe2811ebSPatrick McHardy static inline struct nft_set_ext *nft_set_elem_ext(const struct nft_set *set, 619fe2811ebSPatrick McHardy void *elem) 620fe2811ebSPatrick McHardy { 621fe2811ebSPatrick McHardy return elem + set->ops->elemsize; 622fe2811ebSPatrick McHardy } 623fe2811ebSPatrick McHardy 6248aeff920SPablo Neira Ayuso static inline struct nft_object **nft_set_ext_obj(const struct nft_set_ext *ext) 6258aeff920SPablo Neira Ayuso { 6268aeff920SPablo Neira Ayuso return nft_set_ext(ext, NFT_SET_EXT_OBJREF); 6278aeff920SPablo Neira Ayuso } 6288aeff920SPablo Neira Ayuso 62922fe54d5SPatrick McHardy void *nft_set_elem_init(const struct nft_set *set, 63022fe54d5SPatrick McHardy const struct nft_set_ext_tmpl *tmpl, 63149499c3eSPatrick McHardy const u32 *key, const u32 *data, 63222fe54d5SPatrick McHardy u64 timeout, gfp_t gfp); 63361f9e292SLiping Zhang void nft_set_elem_destroy(const struct nft_set *set, void *elem, 63461f9e292SLiping Zhang bool destroy_expr); 63561edafbbSPatrick McHardy 63620a69341SPatrick McHardy /** 637cfed7e1bSPatrick McHardy * struct nft_set_gc_batch_head - nf_tables set garbage collection batch 638cfed7e1bSPatrick McHardy * 639cfed7e1bSPatrick McHardy * @rcu: rcu head 640cfed7e1bSPatrick McHardy * @set: set the elements belong to 641cfed7e1bSPatrick McHardy * @cnt: count of elements 642cfed7e1bSPatrick McHardy */ 643cfed7e1bSPatrick McHardy struct nft_set_gc_batch_head { 644cfed7e1bSPatrick McHardy struct rcu_head rcu; 645cfed7e1bSPatrick McHardy const struct nft_set *set; 646cfed7e1bSPatrick McHardy unsigned int cnt; 647cfed7e1bSPatrick McHardy }; 648cfed7e1bSPatrick McHardy 649cfed7e1bSPatrick McHardy #define NFT_SET_GC_BATCH_SIZE ((PAGE_SIZE - \ 650cfed7e1bSPatrick McHardy sizeof(struct nft_set_gc_batch_head)) / \ 651cfed7e1bSPatrick McHardy sizeof(void *)) 652cfed7e1bSPatrick McHardy 653cfed7e1bSPatrick McHardy /** 654cfed7e1bSPatrick McHardy * struct nft_set_gc_batch - nf_tables set garbage collection batch 655cfed7e1bSPatrick McHardy * 656cfed7e1bSPatrick McHardy * @head: GC batch head 657cfed7e1bSPatrick McHardy * @elems: garbage collection elements 658cfed7e1bSPatrick McHardy */ 659cfed7e1bSPatrick McHardy struct nft_set_gc_batch { 660cfed7e1bSPatrick McHardy struct nft_set_gc_batch_head head; 661cfed7e1bSPatrick McHardy void *elems[NFT_SET_GC_BATCH_SIZE]; 662cfed7e1bSPatrick McHardy }; 663cfed7e1bSPatrick McHardy 664cfed7e1bSPatrick McHardy struct nft_set_gc_batch *nft_set_gc_batch_alloc(const struct nft_set *set, 665cfed7e1bSPatrick McHardy gfp_t gfp); 666cfed7e1bSPatrick McHardy void nft_set_gc_batch_release(struct rcu_head *rcu); 667cfed7e1bSPatrick McHardy 668cfed7e1bSPatrick McHardy static inline void nft_set_gc_batch_complete(struct nft_set_gc_batch *gcb) 669cfed7e1bSPatrick McHardy { 670cfed7e1bSPatrick McHardy if (gcb != NULL) 671cfed7e1bSPatrick McHardy call_rcu(&gcb->head.rcu, nft_set_gc_batch_release); 672cfed7e1bSPatrick McHardy } 673cfed7e1bSPatrick McHardy 674cfed7e1bSPatrick McHardy static inline struct nft_set_gc_batch * 675cfed7e1bSPatrick McHardy nft_set_gc_batch_check(const struct nft_set *set, struct nft_set_gc_batch *gcb, 676cfed7e1bSPatrick McHardy gfp_t gfp) 677cfed7e1bSPatrick McHardy { 678cfed7e1bSPatrick McHardy if (gcb != NULL) { 679cfed7e1bSPatrick McHardy if (gcb->head.cnt + 1 < ARRAY_SIZE(gcb->elems)) 680cfed7e1bSPatrick McHardy return gcb; 681cfed7e1bSPatrick McHardy nft_set_gc_batch_complete(gcb); 682cfed7e1bSPatrick McHardy } 683cfed7e1bSPatrick McHardy return nft_set_gc_batch_alloc(set, gfp); 684cfed7e1bSPatrick McHardy } 685cfed7e1bSPatrick McHardy 686cfed7e1bSPatrick McHardy static inline void nft_set_gc_batch_add(struct nft_set_gc_batch *gcb, 687cfed7e1bSPatrick McHardy void *elem) 688cfed7e1bSPatrick McHardy { 689cfed7e1bSPatrick McHardy gcb->elems[gcb->head.cnt++] = elem; 690cfed7e1bSPatrick McHardy } 691cfed7e1bSPatrick McHardy 692cfed7e1bSPatrick McHardy /** 693ef1f7df9SPatrick McHardy * struct nft_expr_type - nf_tables expression type 69496518518SPatrick McHardy * 695ef1f7df9SPatrick McHardy * @select_ops: function to select nft_expr_ops 696ef1f7df9SPatrick McHardy * @ops: default ops, used when no select_ops functions is present 69796518518SPatrick McHardy * @list: used internally 69896518518SPatrick McHardy * @name: Identifier 69996518518SPatrick McHardy * @owner: module reference 70096518518SPatrick McHardy * @policy: netlink attribute policy 70196518518SPatrick McHardy * @maxattr: highest netlink attribute number 70264d46806SPatrick McHardy * @family: address family for AF-specific types 703151d799aSPatrick McHardy * @flags: expression type flags 704ef1f7df9SPatrick McHardy */ 705ef1f7df9SPatrick McHardy struct nft_expr_type { 7060ca743a5SPablo Neira Ayuso const struct nft_expr_ops *(*select_ops)(const struct nft_ctx *, 7070ca743a5SPablo Neira Ayuso const struct nlattr * const tb[]); 708ef1f7df9SPatrick McHardy const struct nft_expr_ops *ops; 709ef1f7df9SPatrick McHardy struct list_head list; 710ef1f7df9SPatrick McHardy const char *name; 711ef1f7df9SPatrick McHardy struct module *owner; 712ef1f7df9SPatrick McHardy const struct nla_policy *policy; 713ef1f7df9SPatrick McHardy unsigned int maxattr; 71464d46806SPatrick McHardy u8 family; 715151d799aSPatrick McHardy u8 flags; 716ef1f7df9SPatrick McHardy }; 717ef1f7df9SPatrick McHardy 718151d799aSPatrick McHardy #define NFT_EXPR_STATEFUL 0x1 71979b174adSPablo Neira Ayuso #define NFT_EXPR_GC 0x2 720151d799aSPatrick McHardy 721ef1f7df9SPatrick McHardy /** 722ef1f7df9SPatrick McHardy * struct nft_expr_ops - nf_tables expression operations 723ef1f7df9SPatrick McHardy * 724ef1f7df9SPatrick McHardy * @eval: Expression evaluation function 72596518518SPatrick McHardy * @size: full expression size, including private data size 726ef1f7df9SPatrick McHardy * @init: initialization function 727ef1f7df9SPatrick McHardy * @destroy: destruction function 728ef1f7df9SPatrick McHardy * @dump: function to dump parameters 729ef1f7df9SPatrick McHardy * @type: expression type 7300ca743a5SPablo Neira Ayuso * @validate: validate expression, called during loop detection 7310ca743a5SPablo Neira Ayuso * @data: extra data to attach to this expression operation 73296518518SPatrick McHardy */ 73396518518SPatrick McHardy struct nft_expr; 73496518518SPatrick McHardy struct nft_expr_ops { 73596518518SPatrick McHardy void (*eval)(const struct nft_expr *expr, 736a55e22e9SPatrick McHardy struct nft_regs *regs, 73796518518SPatrick McHardy const struct nft_pktinfo *pkt); 738086f3321SPablo Neira Ayuso int (*clone)(struct nft_expr *dst, 739086f3321SPablo Neira Ayuso const struct nft_expr *src); 740ef1f7df9SPatrick McHardy unsigned int size; 741ef1f7df9SPatrick McHardy 74296518518SPatrick McHardy int (*init)(const struct nft_ctx *ctx, 74396518518SPatrick McHardy const struct nft_expr *expr, 74496518518SPatrick McHardy const struct nlattr * const tb[]); 745bb7b40aeSPablo Neira Ayuso void (*activate)(const struct nft_ctx *ctx, 746bb7b40aeSPablo Neira Ayuso const struct nft_expr *expr); 747bb7b40aeSPablo Neira Ayuso void (*deactivate)(const struct nft_ctx *ctx, 748bb7b40aeSPablo Neira Ayuso const struct nft_expr *expr); 74962472bceSPatrick McHardy void (*destroy)(const struct nft_ctx *ctx, 75062472bceSPatrick McHardy const struct nft_expr *expr); 751371ebcbbSPablo Neira Ayuso void (*destroy_clone)(const struct nft_ctx *ctx, 752371ebcbbSPablo Neira Ayuso const struct nft_expr *expr); 75396518518SPatrick McHardy int (*dump)(struct sk_buff *skb, 75496518518SPatrick McHardy const struct nft_expr *expr); 7550ca743a5SPablo Neira Ayuso int (*validate)(const struct nft_ctx *ctx, 7560ca743a5SPablo Neira Ayuso const struct nft_expr *expr, 7570ca743a5SPablo Neira Ayuso const struct nft_data **data); 75879b174adSPablo Neira Ayuso bool (*gc)(struct net *net, 75979b174adSPablo Neira Ayuso const struct nft_expr *expr); 760ef1f7df9SPatrick McHardy const struct nft_expr_type *type; 7610ca743a5SPablo Neira Ayuso void *data; 76296518518SPatrick McHardy }; 76396518518SPatrick McHardy 764ef1f7df9SPatrick McHardy #define NFT_EXPR_MAXATTR 16 76596518518SPatrick McHardy #define NFT_EXPR_SIZE(size) (sizeof(struct nft_expr) + \ 76696518518SPatrick McHardy ALIGN(size, __alignof__(struct nft_expr))) 76796518518SPatrick McHardy 76896518518SPatrick McHardy /** 76996518518SPatrick McHardy * struct nft_expr - nf_tables expression 77096518518SPatrick McHardy * 77196518518SPatrick McHardy * @ops: expression ops 77296518518SPatrick McHardy * @data: expression private data 77396518518SPatrick McHardy */ 77496518518SPatrick McHardy struct nft_expr { 77596518518SPatrick McHardy const struct nft_expr_ops *ops; 77696518518SPatrick McHardy unsigned char data[]; 77796518518SPatrick McHardy }; 77896518518SPatrick McHardy 77996518518SPatrick McHardy static inline void *nft_expr_priv(const struct nft_expr *expr) 78096518518SPatrick McHardy { 78196518518SPatrick McHardy return (void *)expr->data; 78296518518SPatrick McHardy } 78396518518SPatrick McHardy 7840b2d8a7bSPatrick McHardy struct nft_expr *nft_expr_init(const struct nft_ctx *ctx, 7850b2d8a7bSPatrick McHardy const struct nlattr *nla); 7860b2d8a7bSPatrick McHardy void nft_expr_destroy(const struct nft_ctx *ctx, struct nft_expr *expr); 7870b2d8a7bSPatrick McHardy int nft_expr_dump(struct sk_buff *skb, unsigned int attr, 7880b2d8a7bSPatrick McHardy const struct nft_expr *expr); 7890b2d8a7bSPatrick McHardy 790086f3321SPablo Neira Ayuso static inline int nft_expr_clone(struct nft_expr *dst, struct nft_expr *src) 7910b2d8a7bSPatrick McHardy { 792086f3321SPablo Neira Ayuso int err; 793086f3321SPablo Neira Ayuso 794086f3321SPablo Neira Ayuso if (src->ops->clone) { 795086f3321SPablo Neira Ayuso dst->ops = src->ops; 796086f3321SPablo Neira Ayuso err = src->ops->clone(dst, src); 797086f3321SPablo Neira Ayuso if (err < 0) 798086f3321SPablo Neira Ayuso return err; 799086f3321SPablo Neira Ayuso } else { 8000b2d8a7bSPatrick McHardy memcpy(dst, src, src->ops->size); 8010b2d8a7bSPatrick McHardy } 80261f9e292SLiping Zhang 80361f9e292SLiping Zhang __module_get(src->ops->type->owner); 804086f3321SPablo Neira Ayuso return 0; 805086f3321SPablo Neira Ayuso } 8060b2d8a7bSPatrick McHardy 80796518518SPatrick McHardy /** 80896518518SPatrick McHardy * struct nft_rule - nf_tables rule 80996518518SPatrick McHardy * 81096518518SPatrick McHardy * @list: used internally 81196518518SPatrick McHardy * @handle: rule handle 8120628b123SPablo Neira Ayuso * @genmask: generation mask 81396518518SPatrick McHardy * @dlen: length of expression data 81486f1ec32SPatrick McHardy * @udata: user data is appended to the rule 81596518518SPatrick McHardy * @data: expression data 81696518518SPatrick McHardy */ 81796518518SPatrick McHardy struct nft_rule { 81896518518SPatrick McHardy struct list_head list; 8190768b3b3SPablo Neira Ayuso u64 handle:42, 8200628b123SPablo Neira Ayuso genmask:2, 8210768b3b3SPablo Neira Ayuso dlen:12, 82286f1ec32SPatrick McHardy udata:1; 82396518518SPatrick McHardy unsigned char data[] 82496518518SPatrick McHardy __attribute__((aligned(__alignof__(struct nft_expr)))); 82596518518SPatrick McHardy }; 82696518518SPatrick McHardy 82796518518SPatrick McHardy static inline struct nft_expr *nft_expr_first(const struct nft_rule *rule) 82896518518SPatrick McHardy { 82996518518SPatrick McHardy return (struct nft_expr *)&rule->data[0]; 83096518518SPatrick McHardy } 83196518518SPatrick McHardy 83296518518SPatrick McHardy static inline struct nft_expr *nft_expr_next(const struct nft_expr *expr) 83396518518SPatrick McHardy { 83496518518SPatrick McHardy return ((void *)expr) + expr->ops->size; 83596518518SPatrick McHardy } 83696518518SPatrick McHardy 83796518518SPatrick McHardy static inline struct nft_expr *nft_expr_last(const struct nft_rule *rule) 83896518518SPatrick McHardy { 83996518518SPatrick McHardy return (struct nft_expr *)&rule->data[rule->dlen]; 84096518518SPatrick McHardy } 84196518518SPatrick McHardy 84286f1ec32SPatrick McHardy static inline struct nft_userdata *nft_userdata(const struct nft_rule *rule) 8430768b3b3SPablo Neira Ayuso { 8440768b3b3SPablo Neira Ayuso return (void *)&rule->data[rule->dlen]; 8450768b3b3SPablo Neira Ayuso } 8460768b3b3SPablo Neira Ayuso 84796518518SPatrick McHardy /* 84896518518SPatrick McHardy * The last pointer isn't really necessary, but the compiler isn't able to 84996518518SPatrick McHardy * determine that the result of nft_expr_last() is always the same since it 85096518518SPatrick McHardy * can't assume that the dlen value wasn't changed within calls in the loop. 85196518518SPatrick McHardy */ 85296518518SPatrick McHardy #define nft_rule_for_each_expr(expr, last, rule) \ 85396518518SPatrick McHardy for ((expr) = nft_expr_first(rule), (last) = nft_expr_last(rule); \ 85496518518SPatrick McHardy (expr) != (last); \ 85596518518SPatrick McHardy (expr) = nft_expr_next(expr)) 85696518518SPatrick McHardy 85796518518SPatrick McHardy enum nft_chain_flags { 85896518518SPatrick McHardy NFT_BASE_CHAIN = 0x1, 85996518518SPatrick McHardy }; 86096518518SPatrick McHardy 86196518518SPatrick McHardy /** 86296518518SPatrick McHardy * struct nft_chain - nf_tables chain 86396518518SPatrick McHardy * 86496518518SPatrick McHardy * @rules: list of rules in the chain 86596518518SPatrick McHardy * @list: used internally 8661b2470e5SFlorian Westphal * @rhlhead: used internally 867b5bc89bfSPablo Neira Ayuso * @table: table that this chain belongs to 86896518518SPatrick McHardy * @handle: chain handle 86996518518SPatrick McHardy * @use: number of jump references to this chain 870a0a7379eSPablo Neira Ayuso * @flags: bitmask of enum nft_chain_flags 87196518518SPatrick McHardy * @name: name of the chain 87296518518SPatrick McHardy */ 87396518518SPatrick McHardy struct nft_chain { 8740cbc06b3SFlorian Westphal struct nft_rule *__rcu *rules_gen_0; 8750cbc06b3SFlorian Westphal struct nft_rule *__rcu *rules_gen_1; 87696518518SPatrick McHardy struct list_head rules; 87796518518SPatrick McHardy struct list_head list; 8781b2470e5SFlorian Westphal struct rhlist_head rhlhead; 879b5bc89bfSPablo Neira Ayuso struct nft_table *table; 88096518518SPatrick McHardy u64 handle; 881a0a7379eSPablo Neira Ayuso u32 use; 882664b0f8cSPablo Neira Ayuso u8 flags:6, 883664b0f8cSPablo Neira Ayuso genmask:2; 884b7263e07SPhil Sutter char *name; 8850cbc06b3SFlorian Westphal 8860cbc06b3SFlorian Westphal /* Only used during control plane commit phase: */ 8870cbc06b3SFlorian Westphal struct nft_rule **rules_next; 88896518518SPatrick McHardy }; 88996518518SPatrick McHardy 890a654de8fSPablo Neira Ayuso int nft_chain_validate(const struct nft_ctx *ctx, const struct nft_chain *chain); 891a654de8fSPablo Neira Ayuso 89232537e91SPablo Neira Ayuso enum nft_chain_types { 8939370761cSPablo Neira Ayuso NFT_CHAIN_T_DEFAULT = 0, 8949370761cSPablo Neira Ayuso NFT_CHAIN_T_ROUTE, 8959370761cSPablo Neira Ayuso NFT_CHAIN_T_NAT, 8969370761cSPablo Neira Ayuso NFT_CHAIN_T_MAX 8979370761cSPablo Neira Ayuso }; 8989370761cSPablo Neira Ayuso 8991a1e1a12SPatrick McHardy /** 90032537e91SPablo Neira Ayuso * struct nft_chain_type - nf_tables chain type info 9011a1e1a12SPatrick McHardy * 9021a1e1a12SPatrick McHardy * @name: name of the type 9031a1e1a12SPatrick McHardy * @type: numeric identifier 9041a1e1a12SPatrick McHardy * @family: address family 9051a1e1a12SPatrick McHardy * @owner: module owner 9061a1e1a12SPatrick McHardy * @hook_mask: mask of valid hooks 907c2f9eafeSPablo Neira Ayuso * @hooks: array of hook functions 9084e25ceb8SFlorian Westphal * @ops_register: base chain register function 9094e25ceb8SFlorian Westphal * @ops_unregister: base chain unregister function 9101a1e1a12SPatrick McHardy */ 91132537e91SPablo Neira Ayuso struct nft_chain_type { 9121a1e1a12SPatrick McHardy const char *name; 91332537e91SPablo Neira Ayuso enum nft_chain_types type; 9141a1e1a12SPatrick McHardy int family; 9151a1e1a12SPatrick McHardy struct module *owner; 9161a1e1a12SPatrick McHardy unsigned int hook_mask; 9171a1e1a12SPatrick McHardy nf_hookfn *hooks[NF_MAX_HOOKS]; 9184e25ceb8SFlorian Westphal int (*ops_register)(struct net *net, const struct nf_hook_ops *ops); 9194e25ceb8SFlorian Westphal void (*ops_unregister)(struct net *net, const struct nf_hook_ops *ops); 9201a1e1a12SPatrick McHardy }; 9211a1e1a12SPatrick McHardy 9227210e4e3SPablo Neira Ayuso int nft_chain_validate_dependency(const struct nft_chain *chain, 92332537e91SPablo Neira Ayuso enum nft_chain_types type); 92475e8d06dSPablo Neira Ayuso int nft_chain_validate_hooks(const struct nft_chain *chain, 92575e8d06dSPablo Neira Ayuso unsigned int hook_flags); 9267210e4e3SPablo Neira Ayuso 9270ca743a5SPablo Neira Ayuso struct nft_stats { 9280ca743a5SPablo Neira Ayuso u64 bytes; 9290ca743a5SPablo Neira Ayuso u64 pkts; 930ce355e20SEric Dumazet struct u64_stats_sync syncp; 9310ca743a5SPablo Neira Ayuso }; 9320ca743a5SPablo Neira Ayuso 93396518518SPatrick McHardy /** 93496518518SPatrick McHardy * struct nft_base_chain - nf_tables base chain 93596518518SPatrick McHardy * 93696518518SPatrick McHardy * @ops: netfilter hook ops 9379370761cSPablo Neira Ayuso * @type: chain type 9380ca743a5SPablo Neira Ayuso * @policy: default policy 9390ca743a5SPablo Neira Ayuso * @stats: per-cpu chain stats 94096518518SPatrick McHardy * @chain: the chain 9412cbce139SPablo Neira Ayuso * @dev_name: device name that this base chain is attached to (if any) 94296518518SPatrick McHardy */ 94396518518SPatrick McHardy struct nft_base_chain { 944c974a3a3SPablo Neira Ayuso struct nf_hook_ops ops; 94532537e91SPablo Neira Ayuso const struct nft_chain_type *type; 9460ca743a5SPablo Neira Ayuso u8 policy; 947835b8033SPablo Neira Ayuso u8 flags; 9480ca743a5SPablo Neira Ayuso struct nft_stats __percpu *stats; 94996518518SPatrick McHardy struct nft_chain chain; 9502cbce139SPablo Neira Ayuso char dev_name[IFNAMSIZ]; 95196518518SPatrick McHardy }; 95296518518SPatrick McHardy 95396518518SPatrick McHardy static inline struct nft_base_chain *nft_base_chain(const struct nft_chain *chain) 95496518518SPatrick McHardy { 95596518518SPatrick McHardy return container_of(chain, struct nft_base_chain, chain); 95696518518SPatrick McHardy } 95796518518SPatrick McHardy 958f323d954SPablo Neira Ayuso static inline bool nft_is_base_chain(const struct nft_chain *chain) 959f323d954SPablo Neira Ayuso { 960f323d954SPablo Neira Ayuso return chain->flags & NFT_BASE_CHAIN; 961f323d954SPablo Neira Ayuso } 962f323d954SPablo Neira Ayuso 9635ebe0b0eSPablo Neira Ayuso int __nft_release_basechain(struct nft_ctx *ctx); 964835b8033SPablo Neira Ayuso 96506198b34SEric W. Biederman unsigned int nft_do_chain(struct nft_pktinfo *pkt, void *priv); 96696518518SPatrick McHardy 96796518518SPatrick McHardy /** 96896518518SPatrick McHardy * struct nft_table - nf_tables table 96996518518SPatrick McHardy * 97096518518SPatrick McHardy * @list: used internally 9711b2470e5SFlorian Westphal * @chains_ht: chains in the table 9721b2470e5SFlorian Westphal * @chains: same, for stable walks 97396518518SPatrick McHardy * @sets: sets in the table 974e5009240SPablo Neira Ayuso * @objects: stateful objects in the table 9753b49e2e9SPablo Neira Ayuso * @flowtables: flow tables in the table 97696518518SPatrick McHardy * @hgenerator: handle generator state 9773ecbfd65SHarsha Sharma * @handle: table handle 97896518518SPatrick McHardy * @use: number of chain references to this table 97996518518SPatrick McHardy * @flags: table flag (see enum nft_table_flags) 980f2a6d766SPablo Neira Ayuso * @genmask: generation mask 98136596dadSPablo Neira Ayuso * @afinfo: address family info 98296518518SPatrick McHardy * @name: name of the table 98396518518SPatrick McHardy */ 98496518518SPatrick McHardy struct nft_table { 98596518518SPatrick McHardy struct list_head list; 9861b2470e5SFlorian Westphal struct rhltable chains_ht; 98796518518SPatrick McHardy struct list_head chains; 98896518518SPatrick McHardy struct list_head sets; 989e5009240SPablo Neira Ayuso struct list_head objects; 9903b49e2e9SPablo Neira Ayuso struct list_head flowtables; 99196518518SPatrick McHardy u64 hgenerator; 9923ecbfd65SHarsha Sharma u64 handle; 99396518518SPatrick McHardy u32 use; 99498319cb9SPablo Neira Ayuso u16 family:6, 99598319cb9SPablo Neira Ayuso flags:8, 996f2a6d766SPablo Neira Ayuso genmask:2; 997e46abbccSPhil Sutter char *name; 998ebddf1a8SPablo Neira Ayuso }; 999ebddf1a8SPablo Neira Ayuso 1000cc07eeb0SPablo Neira Ayuso void nft_register_chain_type(const struct nft_chain_type *); 100132537e91SPablo Neira Ayuso void nft_unregister_chain_type(const struct nft_chain_type *); 100296518518SPatrick McHardy 10035eccdfaaSJoe Perches int nft_register_expr(struct nft_expr_type *); 10045eccdfaaSJoe Perches void nft_unregister_expr(struct nft_expr_type *); 100596518518SPatrick McHardy 100633d5a7b1SFlorian Westphal int nft_verdict_dump(struct sk_buff *skb, int type, 100733d5a7b1SFlorian Westphal const struct nft_verdict *v); 100833d5a7b1SFlorian Westphal 100933d5a7b1SFlorian Westphal /** 1010e5009240SPablo Neira Ayuso * struct nft_object - nf_tables stateful object 1011e5009240SPablo Neira Ayuso * 1012e5009240SPablo Neira Ayuso * @list: table stateful object list node 101318965317SPablo Neira Ayuso * @table: table this object belongs to 1014e5009240SPablo Neira Ayuso * @name: name of this stateful object 1015e5009240SPablo Neira Ayuso * @genmask: generation mask 1016e5009240SPablo Neira Ayuso * @use: number of references to this stateful object 10173ecbfd65SHarsha Sharma * @handle: unique object handle 1018dfc46034SPablo M. Bermudo Garay * @ops: object operations 10193ecbfd65SHarsha Sharma * @data: object data, layout depends on type 1020e5009240SPablo Neira Ayuso */ 1021e5009240SPablo Neira Ayuso struct nft_object { 1022e5009240SPablo Neira Ayuso struct list_head list; 102361509575SPhil Sutter char *name; 102418965317SPablo Neira Ayuso struct nft_table *table; 1025e5009240SPablo Neira Ayuso u32 genmask:2, 1026e5009240SPablo Neira Ayuso use:30; 10273ecbfd65SHarsha Sharma u64 handle; 1028e5009240SPablo Neira Ayuso /* runtime data below here */ 1029dfc46034SPablo M. Bermudo Garay const struct nft_object_ops *ops ____cacheline_aligned; 1030e5009240SPablo Neira Ayuso unsigned char data[] 1031e5009240SPablo Neira Ayuso __attribute__((aligned(__alignof__(u64)))); 1032e5009240SPablo Neira Ayuso }; 1033e5009240SPablo Neira Ayuso 1034e5009240SPablo Neira Ayuso static inline void *nft_obj_data(const struct nft_object *obj) 1035e5009240SPablo Neira Ayuso { 1036e5009240SPablo Neira Ayuso return (void *)obj->data; 1037e5009240SPablo Neira Ayuso } 1038e5009240SPablo Neira Ayuso 1039e5009240SPablo Neira Ayuso #define nft_expr_obj(expr) *((struct nft_object **)nft_expr_priv(expr)) 1040e5009240SPablo Neira Ayuso 1041cac20fcdSPablo Neira Ayuso struct nft_object *nft_obj_lookup(const struct nft_table *table, 1042e5009240SPablo Neira Ayuso const struct nlattr *nla, u32 objtype, 1043e5009240SPablo Neira Ayuso u8 genmask); 1044e5009240SPablo Neira Ayuso 104525e94a99SPablo Neira Ayuso void nft_obj_notify(struct net *net, struct nft_table *table, 10462599e989SPablo Neira Ayuso struct nft_object *obj, u32 portid, u32 seq, 10472599e989SPablo Neira Ayuso int event, int family, int report, gfp_t gfp); 10482599e989SPablo Neira Ayuso 1049e5009240SPablo Neira Ayuso /** 1050e5009240SPablo Neira Ayuso * struct nft_object_type - stateful object type 1051e5009240SPablo Neira Ayuso * 1052dfc46034SPablo M. Bermudo Garay * @select_ops: function to select nft_object_ops 1053dfc46034SPablo M. Bermudo Garay * @ops: default ops, used when no select_ops functions is present 1054e5009240SPablo Neira Ayuso * @list: list node in list of object types 1055e5009240SPablo Neira Ayuso * @type: stateful object numeric type 1056e5009240SPablo Neira Ayuso * @owner: module owner 1057e5009240SPablo Neira Ayuso * @maxattr: maximum netlink attribute 1058e5009240SPablo Neira Ayuso * @policy: netlink attribute policy 1059dfc46034SPablo M. Bermudo Garay */ 1060dfc46034SPablo M. Bermudo Garay struct nft_object_type { 1061dfc46034SPablo M. Bermudo Garay const struct nft_object_ops *(*select_ops)(const struct nft_ctx *, 1062dfc46034SPablo M. Bermudo Garay const struct nlattr * const tb[]); 1063dfc46034SPablo M. Bermudo Garay const struct nft_object_ops *ops; 1064dfc46034SPablo M. Bermudo Garay struct list_head list; 1065dfc46034SPablo M. Bermudo Garay u32 type; 1066dfc46034SPablo M. Bermudo Garay unsigned int maxattr; 1067dfc46034SPablo M. Bermudo Garay struct module *owner; 1068dfc46034SPablo M. Bermudo Garay const struct nla_policy *policy; 1069dfc46034SPablo M. Bermudo Garay }; 1070dfc46034SPablo M. Bermudo Garay 1071dfc46034SPablo M. Bermudo Garay /** 1072dfc46034SPablo M. Bermudo Garay * struct nft_object_ops - stateful object operations 1073dfc46034SPablo M. Bermudo Garay * 1074dfc46034SPablo M. Bermudo Garay * @eval: stateful object evaluation function 1075dfc46034SPablo M. Bermudo Garay * @size: stateful object size 1076e5009240SPablo Neira Ayuso * @init: initialize object from netlink attributes 1077e5009240SPablo Neira Ayuso * @destroy: release existing stateful object 1078e5009240SPablo Neira Ayuso * @dump: netlink dump stateful object 1079e5009240SPablo Neira Ayuso */ 1080dfc46034SPablo M. Bermudo Garay struct nft_object_ops { 1081e5009240SPablo Neira Ayuso void (*eval)(struct nft_object *obj, 1082e5009240SPablo Neira Ayuso struct nft_regs *regs, 1083e5009240SPablo Neira Ayuso const struct nft_pktinfo *pkt); 1084e5009240SPablo Neira Ayuso unsigned int size; 108584fba055SFlorian Westphal int (*init)(const struct nft_ctx *ctx, 108684fba055SFlorian Westphal const struct nlattr *const tb[], 1087e5009240SPablo Neira Ayuso struct nft_object *obj); 108800bfb320SPablo Neira Ayuso void (*destroy)(const struct nft_ctx *ctx, 108900bfb320SPablo Neira Ayuso struct nft_object *obj); 1090e5009240SPablo Neira Ayuso int (*dump)(struct sk_buff *skb, 109143da04a5SPablo Neira Ayuso struct nft_object *obj, 109243da04a5SPablo Neira Ayuso bool reset); 1093dfc46034SPablo M. Bermudo Garay const struct nft_object_type *type; 1094e5009240SPablo Neira Ayuso }; 1095e5009240SPablo Neira Ayuso 1096e5009240SPablo Neira Ayuso int nft_register_obj(struct nft_object_type *obj_type); 1097e5009240SPablo Neira Ayuso void nft_unregister_obj(struct nft_object_type *obj_type); 1098e5009240SPablo Neira Ayuso 1099d92191aaSPablo Neira Ayuso #define NFT_FLOWTABLE_DEVICE_MAX 8 1100d92191aaSPablo Neira Ayuso 1101e5009240SPablo Neira Ayuso /** 11023b49e2e9SPablo Neira Ayuso * struct nft_flowtable - nf_tables flow table 11033b49e2e9SPablo Neira Ayuso * 11043b49e2e9SPablo Neira Ayuso * @list: flow table list node in table list 11053b49e2e9SPablo Neira Ayuso * @table: the table the flow table is contained in 11063b49e2e9SPablo Neira Ayuso * @name: name of this flow table 11073b49e2e9SPablo Neira Ayuso * @hooknum: hook number 11083b49e2e9SPablo Neira Ayuso * @priority: hook priority 11093b49e2e9SPablo Neira Ayuso * @ops_len: number of hooks in array 11103b49e2e9SPablo Neira Ayuso * @genmask: generation mask 11113b49e2e9SPablo Neira Ayuso * @use: number of references to this flow table 11123ecbfd65SHarsha Sharma * @handle: unique object handle 1113d92191aaSPablo Neira Ayuso * @dev_name: array of device names 11143b49e2e9SPablo Neira Ayuso * @data: rhashtable and garbage collector 11153b49e2e9SPablo Neira Ayuso * @ops: array of hooks 11163b49e2e9SPablo Neira Ayuso */ 11173b49e2e9SPablo Neira Ayuso struct nft_flowtable { 11183b49e2e9SPablo Neira Ayuso struct list_head list; 11193b49e2e9SPablo Neira Ayuso struct nft_table *table; 11203b49e2e9SPablo Neira Ayuso char *name; 11213b49e2e9SPablo Neira Ayuso int hooknum; 11223b49e2e9SPablo Neira Ayuso int priority; 11233b49e2e9SPablo Neira Ayuso int ops_len; 11243b49e2e9SPablo Neira Ayuso u32 genmask:2, 11253b49e2e9SPablo Neira Ayuso use:30; 11263ecbfd65SHarsha Sharma u64 handle; 11273b49e2e9SPablo Neira Ayuso /* runtime data below here */ 11283b49e2e9SPablo Neira Ayuso struct nf_hook_ops *ops ____cacheline_aligned; 11293b49e2e9SPablo Neira Ayuso struct nf_flowtable data; 11303b49e2e9SPablo Neira Ayuso }; 11313b49e2e9SPablo Neira Ayuso 1132cac20fcdSPablo Neira Ayuso struct nft_flowtable *nft_flowtable_lookup(const struct nft_table *table, 11333b49e2e9SPablo Neira Ayuso const struct nlattr *nla, 11343b49e2e9SPablo Neira Ayuso u8 genmask); 11353b49e2e9SPablo Neira Ayuso 11363b49e2e9SPablo Neira Ayuso void nft_register_flowtable_type(struct nf_flowtable_type *type); 11373b49e2e9SPablo Neira Ayuso void nft_unregister_flowtable_type(struct nf_flowtable_type *type); 11383b49e2e9SPablo Neira Ayuso 11393b49e2e9SPablo Neira Ayuso /** 114033d5a7b1SFlorian Westphal * struct nft_traceinfo - nft tracing information and state 114133d5a7b1SFlorian Westphal * 114233d5a7b1SFlorian Westphal * @pkt: pktinfo currently processed 114333d5a7b1SFlorian Westphal * @basechain: base chain currently processed 114433d5a7b1SFlorian Westphal * @chain: chain currently processed 114533d5a7b1SFlorian Westphal * @rule: rule that was evaluated 114633d5a7b1SFlorian Westphal * @verdict: verdict given by rule 114733d5a7b1SFlorian Westphal * @type: event type (enum nft_trace_types) 114833d5a7b1SFlorian Westphal * @packet_dumped: packet headers sent in a previous traceinfo message 114933d5a7b1SFlorian Westphal * @trace: other struct members are initialised 115033d5a7b1SFlorian Westphal */ 115133d5a7b1SFlorian Westphal struct nft_traceinfo { 115233d5a7b1SFlorian Westphal const struct nft_pktinfo *pkt; 115333d5a7b1SFlorian Westphal const struct nft_base_chain *basechain; 115433d5a7b1SFlorian Westphal const struct nft_chain *chain; 115533d5a7b1SFlorian Westphal const struct nft_rule *rule; 115633d5a7b1SFlorian Westphal const struct nft_verdict *verdict; 115733d5a7b1SFlorian Westphal enum nft_trace_types type; 115833d5a7b1SFlorian Westphal bool packet_dumped; 115933d5a7b1SFlorian Westphal bool trace; 116033d5a7b1SFlorian Westphal }; 116133d5a7b1SFlorian Westphal 116233d5a7b1SFlorian Westphal void nft_trace_init(struct nft_traceinfo *info, const struct nft_pktinfo *pkt, 116333d5a7b1SFlorian Westphal const struct nft_verdict *verdict, 116433d5a7b1SFlorian Westphal const struct nft_chain *basechain); 116533d5a7b1SFlorian Westphal 116633d5a7b1SFlorian Westphal void nft_trace_notify(struct nft_traceinfo *info); 116733d5a7b1SFlorian Westphal 11689370761cSPablo Neira Ayuso #define MODULE_ALIAS_NFT_CHAIN(family, name) \ 11699370761cSPablo Neira Ayuso MODULE_ALIAS("nft-chain-" __stringify(family) "-" name) 117096518518SPatrick McHardy 117164d46806SPatrick McHardy #define MODULE_ALIAS_NFT_AF_EXPR(family, name) \ 117264d46806SPatrick McHardy MODULE_ALIAS("nft-expr-" __stringify(family) "-" name) 117364d46806SPatrick McHardy 117496518518SPatrick McHardy #define MODULE_ALIAS_NFT_EXPR(name) \ 117596518518SPatrick McHardy MODULE_ALIAS("nft-expr-" name) 117696518518SPatrick McHardy 117720a69341SPatrick McHardy #define MODULE_ALIAS_NFT_SET() \ 117820a69341SPatrick McHardy MODULE_ALIAS("nft-set") 117920a69341SPatrick McHardy 1180e5009240SPablo Neira Ayuso #define MODULE_ALIAS_NFT_OBJ(type) \ 1181e5009240SPablo Neira Ayuso MODULE_ALIAS("nft-obj-" __stringify(type)) 1182e5009240SPablo Neira Ayuso 1183ea4bd995SPatrick McHardy /* 1184ea4bd995SPatrick McHardy * The gencursor defines two generations, the currently active and the 1185ea4bd995SPatrick McHardy * next one. Objects contain a bitmask of 2 bits specifying the generations 1186ea4bd995SPatrick McHardy * they're active in. A set bit means they're inactive in the generation 1187ea4bd995SPatrick McHardy * represented by that bit. 1188ea4bd995SPatrick McHardy * 1189ea4bd995SPatrick McHardy * New objects start out as inactive in the current and active in the 1190ea4bd995SPatrick McHardy * next generation. When committing the ruleset the bitmask is cleared, 1191ea4bd995SPatrick McHardy * meaning they're active in all generations. When removing an object, 1192ea4bd995SPatrick McHardy * it is set inactive in the next generation. After committing the ruleset, 1193ea4bd995SPatrick McHardy * the objects are removed. 1194ea4bd995SPatrick McHardy */ 1195ea4bd995SPatrick McHardy static inline unsigned int nft_gencursor_next(const struct net *net) 1196ea4bd995SPatrick McHardy { 1197ea4bd995SPatrick McHardy return net->nft.gencursor + 1 == 1 ? 1 : 0; 1198ea4bd995SPatrick McHardy } 1199ea4bd995SPatrick McHardy 1200ea4bd995SPatrick McHardy static inline u8 nft_genmask_next(const struct net *net) 1201ea4bd995SPatrick McHardy { 1202ea4bd995SPatrick McHardy return 1 << nft_gencursor_next(net); 1203ea4bd995SPatrick McHardy } 1204ea4bd995SPatrick McHardy 1205ea4bd995SPatrick McHardy static inline u8 nft_genmask_cur(const struct net *net) 1206ea4bd995SPatrick McHardy { 120714cd5d4aSMark Rutland /* Use READ_ONCE() to prevent refetching the value for atomicity */ 120814cd5d4aSMark Rutland return 1 << READ_ONCE(net->nft.gencursor); 1209ea4bd995SPatrick McHardy } 1210ea4bd995SPatrick McHardy 121122fe54d5SPatrick McHardy #define NFT_GENMASK_ANY ((1 << 0) | (1 << 1)) 121222fe54d5SPatrick McHardy 1213cc02e457SPatrick McHardy /* 1214889f7ee7SPablo Neira Ayuso * Generic transaction helpers 1215889f7ee7SPablo Neira Ayuso */ 1216889f7ee7SPablo Neira Ayuso 1217889f7ee7SPablo Neira Ayuso /* Check if this object is currently active. */ 1218889f7ee7SPablo Neira Ayuso #define nft_is_active(__net, __obj) \ 1219889f7ee7SPablo Neira Ayuso (((__obj)->genmask & nft_genmask_cur(__net)) == 0) 1220889f7ee7SPablo Neira Ayuso 1221889f7ee7SPablo Neira Ayuso /* Check if this object is active in the next generation. */ 1222889f7ee7SPablo Neira Ayuso #define nft_is_active_next(__net, __obj) \ 1223889f7ee7SPablo Neira Ayuso (((__obj)->genmask & nft_genmask_next(__net)) == 0) 1224889f7ee7SPablo Neira Ayuso 1225889f7ee7SPablo Neira Ayuso /* This object becomes active in the next generation. */ 1226889f7ee7SPablo Neira Ayuso #define nft_activate_next(__net, __obj) \ 1227889f7ee7SPablo Neira Ayuso (__obj)->genmask = nft_genmask_cur(__net) 1228889f7ee7SPablo Neira Ayuso 1229889f7ee7SPablo Neira Ayuso /* This object becomes inactive in the next generation. */ 1230889f7ee7SPablo Neira Ayuso #define nft_deactivate_next(__net, __obj) \ 1231889f7ee7SPablo Neira Ayuso (__obj)->genmask = nft_genmask_next(__net) 1232889f7ee7SPablo Neira Ayuso 1233889f7ee7SPablo Neira Ayuso /* After committing the ruleset, clear the stale generation bit. */ 1234889f7ee7SPablo Neira Ayuso #define nft_clear(__net, __obj) \ 1235889f7ee7SPablo Neira Ayuso (__obj)->genmask &= ~nft_genmask_next(__net) 1236f2a6d766SPablo Neira Ayuso #define nft_active_genmask(__obj, __genmask) \ 1237f2a6d766SPablo Neira Ayuso !((__obj)->genmask & __genmask) 1238889f7ee7SPablo Neira Ayuso 1239889f7ee7SPablo Neira Ayuso /* 1240cc02e457SPatrick McHardy * Set element transaction helpers 1241cc02e457SPatrick McHardy */ 1242cc02e457SPatrick McHardy 1243cc02e457SPatrick McHardy static inline bool nft_set_elem_active(const struct nft_set_ext *ext, 1244cc02e457SPatrick McHardy u8 genmask) 1245cc02e457SPatrick McHardy { 1246cc02e457SPatrick McHardy return !(ext->genmask & genmask); 1247cc02e457SPatrick McHardy } 1248cc02e457SPatrick McHardy 124942a55769SPablo Neira Ayuso static inline void nft_set_elem_change_active(const struct net *net, 125042a55769SPablo Neira Ayuso const struct nft_set *set, 1251cc02e457SPatrick McHardy struct nft_set_ext *ext) 1252cc02e457SPatrick McHardy { 125342a55769SPablo Neira Ayuso ext->genmask ^= nft_genmask_next(net); 1254cc02e457SPatrick McHardy } 1255cc02e457SPatrick McHardy 125669086658SPatrick McHardy /* 125769086658SPatrick McHardy * We use a free bit in the genmask field to indicate the element 125869086658SPatrick McHardy * is busy, meaning it is currently being processed either by 125969086658SPatrick McHardy * the netlink API or GC. 126069086658SPatrick McHardy * 126169086658SPatrick McHardy * Even though the genmask is only a single byte wide, this works 126269086658SPatrick McHardy * because the extension structure if fully constant once initialized, 126369086658SPatrick McHardy * so there are no non-atomic write accesses unless it is already 126469086658SPatrick McHardy * marked busy. 126569086658SPatrick McHardy */ 126669086658SPatrick McHardy #define NFT_SET_ELEM_BUSY_MASK (1 << 2) 126769086658SPatrick McHardy 126869086658SPatrick McHardy #if defined(__LITTLE_ENDIAN_BITFIELD) 126969086658SPatrick McHardy #define NFT_SET_ELEM_BUSY_BIT 2 127069086658SPatrick McHardy #elif defined(__BIG_ENDIAN_BITFIELD) 127169086658SPatrick McHardy #define NFT_SET_ELEM_BUSY_BIT (BITS_PER_LONG - BITS_PER_BYTE + 2) 127269086658SPatrick McHardy #else 127369086658SPatrick McHardy #error 127469086658SPatrick McHardy #endif 127569086658SPatrick McHardy 127669086658SPatrick McHardy static inline int nft_set_elem_mark_busy(struct nft_set_ext *ext) 127769086658SPatrick McHardy { 127869086658SPatrick McHardy unsigned long *word = (unsigned long *)ext; 127969086658SPatrick McHardy 128069086658SPatrick McHardy BUILD_BUG_ON(offsetof(struct nft_set_ext, genmask) != 0); 128169086658SPatrick McHardy return test_and_set_bit(NFT_SET_ELEM_BUSY_BIT, word); 128269086658SPatrick McHardy } 128369086658SPatrick McHardy 128469086658SPatrick McHardy static inline void nft_set_elem_clear_busy(struct nft_set_ext *ext) 128569086658SPatrick McHardy { 128669086658SPatrick McHardy unsigned long *word = (unsigned long *)ext; 128769086658SPatrick McHardy 128869086658SPatrick McHardy clear_bit(NFT_SET_ELEM_BUSY_BIT, word); 128969086658SPatrick McHardy } 129069086658SPatrick McHardy 12911a1e1a12SPatrick McHardy /** 12921a1e1a12SPatrick McHardy * struct nft_trans - nf_tables object update in transaction 12931a1e1a12SPatrick McHardy * 12941a1e1a12SPatrick McHardy * @list: used internally 12951a1e1a12SPatrick McHardy * @msg_type: message type 12961a1e1a12SPatrick McHardy * @ctx: transaction context 12971a1e1a12SPatrick McHardy * @data: internal information related to the transaction 12981a1e1a12SPatrick McHardy */ 12991a1e1a12SPatrick McHardy struct nft_trans { 13001a1e1a12SPatrick McHardy struct list_head list; 13011a1e1a12SPatrick McHardy int msg_type; 13021a1e1a12SPatrick McHardy struct nft_ctx ctx; 13031a1e1a12SPatrick McHardy char data[0]; 13041a1e1a12SPatrick McHardy }; 13051a1e1a12SPatrick McHardy 13061a1e1a12SPatrick McHardy struct nft_trans_rule { 13071a1e1a12SPatrick McHardy struct nft_rule *rule; 13081a94e38dSPablo Neira Ayuso u32 rule_id; 13091a1e1a12SPatrick McHardy }; 13101a1e1a12SPatrick McHardy 13111a1e1a12SPatrick McHardy #define nft_trans_rule(trans) \ 13121a1e1a12SPatrick McHardy (((struct nft_trans_rule *)trans->data)->rule) 13131a94e38dSPablo Neira Ayuso #define nft_trans_rule_id(trans) \ 13141a94e38dSPablo Neira Ayuso (((struct nft_trans_rule *)trans->data)->rule_id) 13151a1e1a12SPatrick McHardy 13161a1e1a12SPatrick McHardy struct nft_trans_set { 13171a1e1a12SPatrick McHardy struct nft_set *set; 13181a1e1a12SPatrick McHardy u32 set_id; 13191a1e1a12SPatrick McHardy }; 13201a1e1a12SPatrick McHardy 13211a1e1a12SPatrick McHardy #define nft_trans_set(trans) \ 13221a1e1a12SPatrick McHardy (((struct nft_trans_set *)trans->data)->set) 13231a1e1a12SPatrick McHardy #define nft_trans_set_id(trans) \ 13241a1e1a12SPatrick McHardy (((struct nft_trans_set *)trans->data)->set_id) 13251a1e1a12SPatrick McHardy 13261a1e1a12SPatrick McHardy struct nft_trans_chain { 13271a1e1a12SPatrick McHardy bool update; 1328b7263e07SPhil Sutter char *name; 13291a1e1a12SPatrick McHardy struct nft_stats __percpu *stats; 13301a1e1a12SPatrick McHardy u8 policy; 13311a1e1a12SPatrick McHardy }; 13321a1e1a12SPatrick McHardy 13331a1e1a12SPatrick McHardy #define nft_trans_chain_update(trans) \ 13341a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->update) 13351a1e1a12SPatrick McHardy #define nft_trans_chain_name(trans) \ 13361a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->name) 13371a1e1a12SPatrick McHardy #define nft_trans_chain_stats(trans) \ 13381a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->stats) 13391a1e1a12SPatrick McHardy #define nft_trans_chain_policy(trans) \ 13401a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->policy) 13411a1e1a12SPatrick McHardy 13421a1e1a12SPatrick McHardy struct nft_trans_table { 13431a1e1a12SPatrick McHardy bool update; 13441a1e1a12SPatrick McHardy bool enable; 13451a1e1a12SPatrick McHardy }; 13461a1e1a12SPatrick McHardy 13471a1e1a12SPatrick McHardy #define nft_trans_table_update(trans) \ 13481a1e1a12SPatrick McHardy (((struct nft_trans_table *)trans->data)->update) 13491a1e1a12SPatrick McHardy #define nft_trans_table_enable(trans) \ 13501a1e1a12SPatrick McHardy (((struct nft_trans_table *)trans->data)->enable) 13511a1e1a12SPatrick McHardy 13521a1e1a12SPatrick McHardy struct nft_trans_elem { 13531a1e1a12SPatrick McHardy struct nft_set *set; 13541a1e1a12SPatrick McHardy struct nft_set_elem elem; 13551a1e1a12SPatrick McHardy }; 13561a1e1a12SPatrick McHardy 13571a1e1a12SPatrick McHardy #define nft_trans_elem_set(trans) \ 13581a1e1a12SPatrick McHardy (((struct nft_trans_elem *)trans->data)->set) 13591a1e1a12SPatrick McHardy #define nft_trans_elem(trans) \ 13601a1e1a12SPatrick McHardy (((struct nft_trans_elem *)trans->data)->elem) 13611a1e1a12SPatrick McHardy 1362e5009240SPablo Neira Ayuso struct nft_trans_obj { 1363e5009240SPablo Neira Ayuso struct nft_object *obj; 1364e5009240SPablo Neira Ayuso }; 1365e5009240SPablo Neira Ayuso 1366e5009240SPablo Neira Ayuso #define nft_trans_obj(trans) \ 1367e5009240SPablo Neira Ayuso (((struct nft_trans_obj *)trans->data)->obj) 1368e5009240SPablo Neira Ayuso 13693b49e2e9SPablo Neira Ayuso struct nft_trans_flowtable { 13703b49e2e9SPablo Neira Ayuso struct nft_flowtable *flowtable; 13713b49e2e9SPablo Neira Ayuso }; 13723b49e2e9SPablo Neira Ayuso 13733b49e2e9SPablo Neira Ayuso #define nft_trans_flowtable(trans) \ 13743b49e2e9SPablo Neira Ayuso (((struct nft_trans_flowtable *)trans->data)->flowtable) 13753b49e2e9SPablo Neira Ayuso 137602c7b25eSPablo Neira Ayuso int __init nft_chain_filter_init(void); 137702c7b25eSPablo Neira Ayuso void __exit nft_chain_filter_fini(void); 137802c7b25eSPablo Neira Ayuso 137996518518SPatrick McHardy #endif /* _NET_NF_TABLES_H */ 1380