196518518SPatrick McHardy #ifndef _NET_NF_TABLES_H 296518518SPatrick McHardy #define _NET_NF_TABLES_H 396518518SPatrick McHardy 40b2d8a7bSPatrick McHardy #include <linux/module.h> 596518518SPatrick McHardy #include <linux/list.h> 696518518SPatrick McHardy #include <linux/netfilter.h> 767a8fc27SPatrick McHardy #include <linux/netfilter/nfnetlink.h> 80ca743a5SPablo Neira Ayuso #include <linux/netfilter/x_tables.h> 996518518SPatrick McHardy #include <linux/netfilter/nf_tables.h> 10ce355e20SEric Dumazet #include <linux/u64_stats_sync.h> 1196518518SPatrick McHardy #include <net/netlink.h> 1296518518SPatrick McHardy 1320a69341SPatrick McHardy #define NFT_JUMP_STACK_SIZE 16 1420a69341SPatrick McHardy 1596518518SPatrick McHardy struct nft_pktinfo { 1696518518SPatrick McHardy struct sk_buff *skb; 17beac5afaSPablo Neira Ayuso bool tprot_set; 184566bf27SPatrick McHardy u8 tprot; 190ca743a5SPablo Neira Ayuso /* for x_tables compatibility */ 200ca743a5SPablo Neira Ayuso struct xt_action_param xt; 2196518518SPatrick McHardy }; 2296518518SPatrick McHardy 230e5a1c7eSPablo Neira Ayuso static inline struct net *nft_net(const struct nft_pktinfo *pkt) 240e5a1c7eSPablo Neira Ayuso { 250e5a1c7eSPablo Neira Ayuso return pkt->xt.state->net; 260e5a1c7eSPablo Neira Ayuso } 270e5a1c7eSPablo Neira Ayuso 280e5a1c7eSPablo Neira Ayuso static inline unsigned int nft_hook(const struct nft_pktinfo *pkt) 290e5a1c7eSPablo Neira Ayuso { 300e5a1c7eSPablo Neira Ayuso return pkt->xt.state->hook; 310e5a1c7eSPablo Neira Ayuso } 320e5a1c7eSPablo Neira Ayuso 330e5a1c7eSPablo Neira Ayuso static inline u8 nft_pf(const struct nft_pktinfo *pkt) 340e5a1c7eSPablo Neira Ayuso { 350e5a1c7eSPablo Neira Ayuso return pkt->xt.state->pf; 360e5a1c7eSPablo Neira Ayuso } 370e5a1c7eSPablo Neira Ayuso 380e5a1c7eSPablo Neira Ayuso static inline const struct net_device *nft_in(const struct nft_pktinfo *pkt) 390e5a1c7eSPablo Neira Ayuso { 400e5a1c7eSPablo Neira Ayuso return pkt->xt.state->in; 410e5a1c7eSPablo Neira Ayuso } 420e5a1c7eSPablo Neira Ayuso 430e5a1c7eSPablo Neira Ayuso static inline const struct net_device *nft_out(const struct nft_pktinfo *pkt) 440e5a1c7eSPablo Neira Ayuso { 450e5a1c7eSPablo Neira Ayuso return pkt->xt.state->out; 460e5a1c7eSPablo Neira Ayuso } 470e5a1c7eSPablo Neira Ayuso 480ca743a5SPablo Neira Ayuso static inline void nft_set_pktinfo(struct nft_pktinfo *pkt, 490ca743a5SPablo Neira Ayuso struct sk_buff *skb, 50073bfd56SDavid S. Miller const struct nf_hook_state *state) 510ca743a5SPablo Neira Ayuso { 520ca743a5SPablo Neira Ayuso pkt->skb = skb; 53613dbd95SPablo Neira Ayuso pkt->xt.state = state; 540ca743a5SPablo Neira Ayuso } 550ca743a5SPablo Neira Ayuso 56beac5afaSPablo Neira Ayuso static inline void nft_set_pktinfo_proto_unspec(struct nft_pktinfo *pkt, 57beac5afaSPablo Neira Ayuso struct sk_buff *skb) 58beac5afaSPablo Neira Ayuso { 59beac5afaSPablo Neira Ayuso pkt->tprot_set = false; 60beac5afaSPablo Neira Ayuso pkt->tprot = 0; 61beac5afaSPablo Neira Ayuso pkt->xt.thoff = 0; 62beac5afaSPablo Neira Ayuso pkt->xt.fragoff = 0; 63beac5afaSPablo Neira Ayuso } 64beac5afaSPablo Neira Ayuso 65beac5afaSPablo Neira Ayuso static inline void nft_set_pktinfo_unspec(struct nft_pktinfo *pkt, 66beac5afaSPablo Neira Ayuso struct sk_buff *skb, 67beac5afaSPablo Neira Ayuso const struct nf_hook_state *state) 68beac5afaSPablo Neira Ayuso { 69beac5afaSPablo Neira Ayuso nft_set_pktinfo(pkt, skb, state); 70beac5afaSPablo Neira Ayuso nft_set_pktinfo_proto_unspec(pkt, skb); 71beac5afaSPablo Neira Ayuso } 72beac5afaSPablo Neira Ayuso 73a55e22e9SPatrick McHardy /** 74a55e22e9SPatrick McHardy * struct nft_verdict - nf_tables verdict 75a55e22e9SPatrick McHardy * 76a55e22e9SPatrick McHardy * @code: nf_tables/netfilter verdict code 77a55e22e9SPatrick McHardy * @chain: destination chain for NFT_JUMP/NFT_GOTO 78a55e22e9SPatrick McHardy */ 79a55e22e9SPatrick McHardy struct nft_verdict { 80a55e22e9SPatrick McHardy u32 code; 81a55e22e9SPatrick McHardy struct nft_chain *chain; 82a55e22e9SPatrick McHardy }; 83a55e22e9SPatrick McHardy 8496518518SPatrick McHardy struct nft_data { 8596518518SPatrick McHardy union { 8696518518SPatrick McHardy u32 data[4]; 871ca2e170SPatrick McHardy struct nft_verdict verdict; 8896518518SPatrick McHardy }; 8996518518SPatrick McHardy } __attribute__((aligned(__alignof__(u64)))); 9096518518SPatrick McHardy 91a55e22e9SPatrick McHardy /** 92a55e22e9SPatrick McHardy * struct nft_regs - nf_tables register set 93a55e22e9SPatrick McHardy * 94a55e22e9SPatrick McHardy * @data: data registers 95a55e22e9SPatrick McHardy * @verdict: verdict register 96a55e22e9SPatrick McHardy * 97a55e22e9SPatrick McHardy * The first four data registers alias to the verdict register. 98a55e22e9SPatrick McHardy */ 99a55e22e9SPatrick McHardy struct nft_regs { 100a55e22e9SPatrick McHardy union { 10149499c3eSPatrick McHardy u32 data[20]; 102a55e22e9SPatrick McHardy struct nft_verdict verdict; 103a55e22e9SPatrick McHardy }; 104a55e22e9SPatrick McHardy }; 105a55e22e9SPatrick McHardy 10610596608SLiping Zhang /* Store/load an u16 or u8 integer to/from the u32 data register. 10710596608SLiping Zhang * 10810596608SLiping Zhang * Note, when using concatenations, register allocation happens at 32-bit 10910596608SLiping Zhang * level. So for store instruction, pad the rest part with zero to avoid 11010596608SLiping Zhang * garbage values. 11110596608SLiping Zhang */ 11210596608SLiping Zhang 11310596608SLiping Zhang static inline void nft_reg_store16(u32 *dreg, u16 val) 11410596608SLiping Zhang { 11510596608SLiping Zhang *dreg = 0; 11610596608SLiping Zhang *(u16 *)dreg = val; 11710596608SLiping Zhang } 11810596608SLiping Zhang 11910596608SLiping Zhang static inline void nft_reg_store8(u32 *dreg, u8 val) 12010596608SLiping Zhang { 12110596608SLiping Zhang *dreg = 0; 12210596608SLiping Zhang *(u8 *)dreg = val; 12310596608SLiping Zhang } 12410596608SLiping Zhang 12510596608SLiping Zhang static inline u16 nft_reg_load16(u32 *sreg) 12610596608SLiping Zhang { 12710596608SLiping Zhang return *(u16 *)sreg; 12810596608SLiping Zhang } 12910596608SLiping Zhang 13010596608SLiping Zhang static inline u8 nft_reg_load8(u32 *sreg) 13110596608SLiping Zhang { 13210596608SLiping Zhang return *(u8 *)sreg; 13310596608SLiping Zhang } 13410596608SLiping Zhang 13549499c3eSPatrick McHardy static inline void nft_data_copy(u32 *dst, const struct nft_data *src, 13649499c3eSPatrick McHardy unsigned int len) 13796518518SPatrick McHardy { 13849499c3eSPatrick McHardy memcpy(dst, src, len); 13996518518SPatrick McHardy } 14096518518SPatrick McHardy 14196518518SPatrick McHardy static inline void nft_data_debug(const struct nft_data *data) 14296518518SPatrick McHardy { 14396518518SPatrick McHardy pr_debug("data[0]=%x data[1]=%x data[2]=%x data[3]=%x\n", 14496518518SPatrick McHardy data->data[0], data->data[1], 14596518518SPatrick McHardy data->data[2], data->data[3]); 14696518518SPatrick McHardy } 14796518518SPatrick McHardy 14896518518SPatrick McHardy /** 14920a69341SPatrick McHardy * struct nft_ctx - nf_tables rule/set context 15096518518SPatrick McHardy * 15199633ab2SPablo Neira Ayuso * @net: net namespace 15296518518SPatrick McHardy * @afi: address family info 15396518518SPatrick McHardy * @table: the table the chain is contained in 15496518518SPatrick McHardy * @chain: the chain the rule is contained in 1550ca743a5SPablo Neira Ayuso * @nla: netlink attributes 156128ad332SPablo Neira Ayuso * @portid: netlink portID of the original message 157128ad332SPablo Neira Ayuso * @seq: netlink sequence number 158128ad332SPablo Neira Ayuso * @report: notify via unicast netlink message 15996518518SPatrick McHardy */ 16096518518SPatrick McHardy struct nft_ctx { 16199633ab2SPablo Neira Ayuso struct net *net; 1627c95f6d8SPablo Neira Ayuso struct nft_af_info *afi; 1637c95f6d8SPablo Neira Ayuso struct nft_table *table; 1647c95f6d8SPablo Neira Ayuso struct nft_chain *chain; 1650ca743a5SPablo Neira Ayuso const struct nlattr * const *nla; 166128ad332SPablo Neira Ayuso u32 portid; 167128ad332SPablo Neira Ayuso u32 seq; 168128ad332SPablo Neira Ayuso bool report; 16996518518SPatrick McHardy }; 17096518518SPatrick McHardy 17196518518SPatrick McHardy struct nft_data_desc { 17296518518SPatrick McHardy enum nft_data_types type; 17396518518SPatrick McHardy unsigned int len; 17496518518SPatrick McHardy }; 17596518518SPatrick McHardy 176d0a11fc3SPatrick McHardy int nft_data_init(const struct nft_ctx *ctx, 177d0a11fc3SPatrick McHardy struct nft_data *data, unsigned int size, 17896518518SPatrick McHardy struct nft_data_desc *desc, const struct nlattr *nla); 17959105446SPablo Neira Ayuso void nft_data_release(const struct nft_data *data, enum nft_data_types type); 1805eccdfaaSJoe Perches int nft_data_dump(struct sk_buff *skb, int attr, const struct nft_data *data, 18196518518SPatrick McHardy enum nft_data_types type, unsigned int len); 18296518518SPatrick McHardy 18396518518SPatrick McHardy static inline enum nft_data_types nft_dreg_to_type(enum nft_registers reg) 18496518518SPatrick McHardy { 18596518518SPatrick McHardy return reg == NFT_REG_VERDICT ? NFT_DATA_VERDICT : NFT_DATA_VALUE; 18696518518SPatrick McHardy } 18796518518SPatrick McHardy 18820a69341SPatrick McHardy static inline enum nft_registers nft_type_to_reg(enum nft_data_types type) 18920a69341SPatrick McHardy { 190bf798657SPablo Neira Ayuso return type == NFT_DATA_VERDICT ? NFT_REG_VERDICT : NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE; 19120a69341SPatrick McHardy } 19220a69341SPatrick McHardy 193f1d505bbSJohn W. Linville int nft_parse_u32_check(const struct nlattr *attr, int max, u32 *dest); 194b1c96ed3SPatrick McHardy unsigned int nft_parse_register(const struct nlattr *attr); 195b1c96ed3SPatrick McHardy int nft_dump_register(struct sk_buff *skb, unsigned int attr, unsigned int reg); 196b1c96ed3SPatrick McHardy 197d07db988SPatrick McHardy int nft_validate_register_load(enum nft_registers reg, unsigned int len); 1981ec10212SPatrick McHardy int nft_validate_register_store(const struct nft_ctx *ctx, 1991ec10212SPatrick McHardy enum nft_registers reg, 20096518518SPatrick McHardy const struct nft_data *data, 20145d9bcdaSPatrick McHardy enum nft_data_types type, unsigned int len); 20296518518SPatrick McHardy 20386f1ec32SPatrick McHardy /** 20486f1ec32SPatrick McHardy * struct nft_userdata - user defined data associated with an object 20586f1ec32SPatrick McHardy * 20686f1ec32SPatrick McHardy * @len: length of the data 20786f1ec32SPatrick McHardy * @data: content 20886f1ec32SPatrick McHardy * 20986f1ec32SPatrick McHardy * The presence of user data is indicated in an object specific fashion, 21086f1ec32SPatrick McHardy * so a length of zero can't occur and the value "len" indicates data 21186f1ec32SPatrick McHardy * of length len + 1. 21286f1ec32SPatrick McHardy */ 21386f1ec32SPatrick McHardy struct nft_userdata { 21486f1ec32SPatrick McHardy u8 len; 21586f1ec32SPatrick McHardy unsigned char data[0]; 21686f1ec32SPatrick McHardy }; 21786f1ec32SPatrick McHardy 21896518518SPatrick McHardy /** 21920a69341SPatrick McHardy * struct nft_set_elem - generic representation of set elements 22020a69341SPatrick McHardy * 22120a69341SPatrick McHardy * @key: element key 222fe2811ebSPatrick McHardy * @priv: element private data and extensions 22320a69341SPatrick McHardy */ 22420a69341SPatrick McHardy struct nft_set_elem { 2257d740264SPatrick McHardy union { 2267d740264SPatrick McHardy u32 buf[NFT_DATA_VALUE_MAXLEN / sizeof(u32)]; 2277d740264SPatrick McHardy struct nft_data val; 2287d740264SPatrick McHardy } key; 229fe2811ebSPatrick McHardy void *priv; 23020a69341SPatrick McHardy }; 23120a69341SPatrick McHardy 23220a69341SPatrick McHardy struct nft_set; 23320a69341SPatrick McHardy struct nft_set_iter { 2348588ac09SPablo Neira Ayuso u8 genmask; 23520a69341SPatrick McHardy unsigned int count; 23620a69341SPatrick McHardy unsigned int skip; 23720a69341SPatrick McHardy int err; 23820a69341SPatrick McHardy int (*fn)(const struct nft_ctx *ctx, 239de70185dSPablo Neira Ayuso struct nft_set *set, 24020a69341SPatrick McHardy const struct nft_set_iter *iter, 241de70185dSPablo Neira Ayuso struct nft_set_elem *elem); 24220a69341SPatrick McHardy }; 24320a69341SPatrick McHardy 24420a69341SPatrick McHardy /** 245c50b960cSPatrick McHardy * struct nft_set_desc - description of set elements 246c50b960cSPatrick McHardy * 247c50b960cSPatrick McHardy * @klen: key length 248c50b960cSPatrick McHardy * @dlen: data length 249c50b960cSPatrick McHardy * @size: number of set elements 250c50b960cSPatrick McHardy */ 251c50b960cSPatrick McHardy struct nft_set_desc { 252c50b960cSPatrick McHardy unsigned int klen; 253c50b960cSPatrick McHardy unsigned int dlen; 254c50b960cSPatrick McHardy unsigned int size; 255c50b960cSPatrick McHardy }; 256c50b960cSPatrick McHardy 257c50b960cSPatrick McHardy /** 258c50b960cSPatrick McHardy * enum nft_set_class - performance class 259c50b960cSPatrick McHardy * 260c50b960cSPatrick McHardy * @NFT_LOOKUP_O_1: constant, O(1) 261c50b960cSPatrick McHardy * @NFT_LOOKUP_O_LOG_N: logarithmic, O(log N) 262c50b960cSPatrick McHardy * @NFT_LOOKUP_O_N: linear, O(N) 263c50b960cSPatrick McHardy */ 264c50b960cSPatrick McHardy enum nft_set_class { 265c50b960cSPatrick McHardy NFT_SET_CLASS_O_1, 266c50b960cSPatrick McHardy NFT_SET_CLASS_O_LOG_N, 267c50b960cSPatrick McHardy NFT_SET_CLASS_O_N, 268c50b960cSPatrick McHardy }; 269c50b960cSPatrick McHardy 270c50b960cSPatrick McHardy /** 271c50b960cSPatrick McHardy * struct nft_set_estimate - estimation of memory and performance 272c50b960cSPatrick McHardy * characteristics 273c50b960cSPatrick McHardy * 274c50b960cSPatrick McHardy * @size: required memory 27555af753cSPablo Neira Ayuso * @lookup: lookup performance class 2760b5a7874SPablo Neira Ayuso * @space: memory class 277c50b960cSPatrick McHardy */ 278c50b960cSPatrick McHardy struct nft_set_estimate { 279c50b960cSPatrick McHardy unsigned int size; 28055af753cSPablo Neira Ayuso enum nft_set_class lookup; 2810b5a7874SPablo Neira Ayuso enum nft_set_class space; 282c50b960cSPatrick McHardy }; 283c50b960cSPatrick McHardy 2842b664957SPablo Neira Ayuso /** 2852b664957SPablo Neira Ayuso * struct nft_set_type - nf_tables set type 2862b664957SPablo Neira Ayuso * 2872b664957SPablo Neira Ayuso * @select_ops: function to select nft_set_ops 2882b664957SPablo Neira Ayuso * @ops: default ops, used when no select_ops functions is present 2892b664957SPablo Neira Ayuso * @list: used internally 2902b664957SPablo Neira Ayuso * @owner: module reference 2912b664957SPablo Neira Ayuso */ 2922b664957SPablo Neira Ayuso struct nft_set_type { 2932b664957SPablo Neira Ayuso const struct nft_set_ops *(*select_ops)(const struct nft_ctx *, 2942b664957SPablo Neira Ayuso const struct nft_set_desc *desc, 2952b664957SPablo Neira Ayuso u32 flags); 2962b664957SPablo Neira Ayuso const struct nft_set_ops *ops; 2972b664957SPablo Neira Ayuso struct list_head list; 2982b664957SPablo Neira Ayuso struct module *owner; 2992b664957SPablo Neira Ayuso }; 3002b664957SPablo Neira Ayuso 301b2832dd6SPatrick McHardy struct nft_set_ext; 30222fe54d5SPatrick McHardy struct nft_expr; 303b2832dd6SPatrick McHardy 304c50b960cSPatrick McHardy /** 30520a69341SPatrick McHardy * struct nft_set_ops - nf_tables set operations 30620a69341SPatrick McHardy * 30720a69341SPatrick McHardy * @lookup: look up an element within the set 30820a69341SPatrick McHardy * @insert: insert new element into set 309cc02e457SPatrick McHardy * @activate: activate new element in the next generation 3108411b644SPablo Neira Ayuso * @deactivate: lookup for element and deactivate it in the next generation 3111ba1c414SPablo Neira Ayuso * @flush: deactivate element in the next generation 31220a69341SPatrick McHardy * @remove: remove element from set 31320a69341SPatrick McHardy * @walk: iterate over all set elemeennts 31420a69341SPatrick McHardy * @privsize: function to return size of set private data 31520a69341SPatrick McHardy * @init: initialize private data of new set instance 31620a69341SPatrick McHardy * @destroy: destroy private data of set instance 317fe2811ebSPatrick McHardy * @elemsize: element private size 31820a69341SPatrick McHardy * @features: features supported by the implementation 31920a69341SPatrick McHardy */ 32020a69341SPatrick McHardy struct nft_set_ops { 32142a55769SPablo Neira Ayuso bool (*lookup)(const struct net *net, 32242a55769SPablo Neira Ayuso const struct nft_set *set, 3238cd8937aSPatrick McHardy const u32 *key, 324b2832dd6SPatrick McHardy const struct nft_set_ext **ext); 32522fe54d5SPatrick McHardy bool (*update)(struct nft_set *set, 3268cd8937aSPatrick McHardy const u32 *key, 32722fe54d5SPatrick McHardy void *(*new)(struct nft_set *, 32822fe54d5SPatrick McHardy const struct nft_expr *, 329a55e22e9SPatrick McHardy struct nft_regs *), 33022fe54d5SPatrick McHardy const struct nft_expr *expr, 331a55e22e9SPatrick McHardy struct nft_regs *regs, 33222fe54d5SPatrick McHardy const struct nft_set_ext **ext); 33322fe54d5SPatrick McHardy 33442a55769SPablo Neira Ayuso int (*insert)(const struct net *net, 33542a55769SPablo Neira Ayuso const struct nft_set *set, 336c016c7e4SPablo Neira Ayuso const struct nft_set_elem *elem, 337c016c7e4SPablo Neira Ayuso struct nft_set_ext **ext); 33842a55769SPablo Neira Ayuso void (*activate)(const struct net *net, 33942a55769SPablo Neira Ayuso const struct nft_set *set, 340cc02e457SPatrick McHardy const struct nft_set_elem *elem); 34142a55769SPablo Neira Ayuso void * (*deactivate)(const struct net *net, 34242a55769SPablo Neira Ayuso const struct nft_set *set, 343cc02e457SPatrick McHardy const struct nft_set_elem *elem); 3441ba1c414SPablo Neira Ayuso bool (*flush)(const struct net *net, 3458411b644SPablo Neira Ayuso const struct nft_set *set, 3468411b644SPablo Neira Ayuso void *priv); 3475cb82a38SPablo Neira Ayuso void (*remove)(const struct net *net, 3485cb82a38SPablo Neira Ayuso const struct nft_set *set, 34920a69341SPatrick McHardy const struct nft_set_elem *elem); 35020a69341SPatrick McHardy void (*walk)(const struct nft_ctx *ctx, 351de70185dSPablo Neira Ayuso struct nft_set *set, 35220a69341SPatrick McHardy struct nft_set_iter *iter); 35320a69341SPatrick McHardy 354347b408dSPablo Neira Ayuso unsigned int (*privsize)(const struct nlattr * const nla[], 355347b408dSPablo Neira Ayuso const struct nft_set_desc *desc); 356c50b960cSPatrick McHardy bool (*estimate)(const struct nft_set_desc *desc, 357c50b960cSPatrick McHardy u32 features, 358c50b960cSPatrick McHardy struct nft_set_estimate *est); 35920a69341SPatrick McHardy int (*init)(const struct nft_set *set, 360c50b960cSPatrick McHardy const struct nft_set_desc *desc, 36120a69341SPatrick McHardy const struct nlattr * const nla[]); 36220a69341SPatrick McHardy void (*destroy)(const struct nft_set *set); 36320a69341SPatrick McHardy 364fe2811ebSPatrick McHardy unsigned int elemsize; 36520a69341SPatrick McHardy u32 features; 3662b664957SPablo Neira Ayuso const struct nft_set_type *type; 36720a69341SPatrick McHardy }; 36820a69341SPatrick McHardy 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 37720a69341SPatrick McHardy * @name: name of the set 37820a69341SPatrick McHardy * @ktype: key type (numeric type defined by userspace, not used in the kernel) 37920a69341SPatrick McHardy * @dtype: data type (verdict or numeric type defined by userspace) 3808aeff920SPablo Neira Ayuso * @objtype: object type (see NFT_OBJECT_* definitions) 381c50b960cSPatrick McHardy * @size: maximum set size 382c50b960cSPatrick McHardy * @nelems: number of elements 3833dd0673aSPatrick McHardy * @ndeact: number of deactivated elements queued for removal 384d3e2a111SAnders K. Pedersen * @timeout: default timeout value in jiffies 385761da293SPatrick McHardy * @gc_int: garbage collection interval in msecs 3869363dc4bSArturo Borrero * @policy: set parameterization (see enum nft_set_policies) 387e6d8ecacSCarlos Falgueras García * @udlen: user data length 388e6d8ecacSCarlos Falgueras García * @udata: user data 38920a69341SPatrick McHardy * @ops: set ops 39020a69341SPatrick McHardy * @flags: set flags 39137a9cc52SPablo Neira Ayuso * @genmask: generation mask 39220a69341SPatrick McHardy * @klen: key length 39320a69341SPatrick McHardy * @dlen: data length 39420a69341SPatrick McHardy * @data: private set data 39520a69341SPatrick McHardy */ 39620a69341SPatrick McHardy struct nft_set { 39720a69341SPatrick McHardy struct list_head list; 39820a69341SPatrick McHardy struct list_head bindings; 399cb39ad8bSPablo Neira Ayuso char name[NFT_SET_MAXNAMELEN]; 40020a69341SPatrick McHardy u32 ktype; 40120a69341SPatrick McHardy u32 dtype; 4028aeff920SPablo Neira Ayuso u32 objtype; 403c50b960cSPatrick McHardy u32 size; 4043dd0673aSPatrick McHardy atomic_t nelems; 4053dd0673aSPatrick McHardy u32 ndeact; 406761da293SPatrick McHardy u64 timeout; 407761da293SPatrick McHardy u32 gc_int; 4089363dc4bSArturo Borrero u16 policy; 409e6d8ecacSCarlos Falgueras García u16 udlen; 410e6d8ecacSCarlos Falgueras García unsigned char *udata; 41120a69341SPatrick McHardy /* runtime data below here */ 41220a69341SPatrick McHardy const struct nft_set_ops *ops ____cacheline_aligned; 41337a9cc52SPablo Neira Ayuso u16 flags:14, 41437a9cc52SPablo Neira Ayuso genmask:2; 41520a69341SPatrick McHardy u8 klen; 41620a69341SPatrick McHardy u8 dlen; 41720a69341SPatrick McHardy unsigned char data[] 41820a69341SPatrick McHardy __attribute__((aligned(__alignof__(u64)))); 41920a69341SPatrick McHardy }; 42020a69341SPatrick McHardy 42120a69341SPatrick McHardy static inline void *nft_set_priv(const struct nft_set *set) 42220a69341SPatrick McHardy { 42320a69341SPatrick McHardy return (void *)set->data; 42420a69341SPatrick McHardy } 42520a69341SPatrick McHardy 4269d098292SPatrick McHardy static inline struct nft_set *nft_set_container_of(const void *priv) 4279d098292SPatrick McHardy { 4289d098292SPatrick McHardy return (void *)priv - offsetof(struct nft_set, data); 4299d098292SPatrick McHardy } 4309d098292SPatrick McHardy 431c7a72e3fSPablo Neira Ayuso struct nft_set *nft_set_lookup(const struct net *net, 432c7a72e3fSPablo Neira Ayuso const struct nft_table *table, 433c7a72e3fSPablo Neira Ayuso const struct nlattr *nla_set_name, 434c7a72e3fSPablo Neira Ayuso const struct nlattr *nla_set_id, 435c7a72e3fSPablo Neira Ayuso u8 genmask); 43620a69341SPatrick McHardy 437761da293SPatrick McHardy static inline unsigned long nft_set_gc_interval(const struct nft_set *set) 438761da293SPatrick McHardy { 439761da293SPatrick McHardy return set->gc_int ? msecs_to_jiffies(set->gc_int) : HZ; 440761da293SPatrick McHardy } 441761da293SPatrick McHardy 44220a69341SPatrick McHardy /** 44320a69341SPatrick McHardy * struct nft_set_binding - nf_tables set binding 44420a69341SPatrick McHardy * 44520a69341SPatrick McHardy * @list: set bindings list node 44620a69341SPatrick McHardy * @chain: chain containing the rule bound to the set 44711113e19SPatrick McHardy * @flags: set action flags 44820a69341SPatrick McHardy * 44920a69341SPatrick McHardy * A set binding contains all information necessary for validation 45020a69341SPatrick McHardy * of new elements added to a bound set. 45120a69341SPatrick McHardy */ 45220a69341SPatrick McHardy struct nft_set_binding { 45320a69341SPatrick McHardy struct list_head list; 45420a69341SPatrick McHardy const struct nft_chain *chain; 45511113e19SPatrick McHardy u32 flags; 45620a69341SPatrick McHardy }; 45720a69341SPatrick McHardy 4585eccdfaaSJoe Perches int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set, 45920a69341SPatrick McHardy struct nft_set_binding *binding); 4605eccdfaaSJoe Perches void nf_tables_unbind_set(const struct nft_ctx *ctx, struct nft_set *set, 46120a69341SPatrick McHardy struct nft_set_binding *binding); 46220a69341SPatrick McHardy 4633ac4c07aSPatrick McHardy /** 4643ac4c07aSPatrick McHardy * enum nft_set_extensions - set extension type IDs 4653ac4c07aSPatrick McHardy * 4663ac4c07aSPatrick McHardy * @NFT_SET_EXT_KEY: element key 4673ac4c07aSPatrick McHardy * @NFT_SET_EXT_DATA: mapping data 4683ac4c07aSPatrick McHardy * @NFT_SET_EXT_FLAGS: element flags 469c3e1b005SPatrick McHardy * @NFT_SET_EXT_TIMEOUT: element timeout 470c3e1b005SPatrick McHardy * @NFT_SET_EXT_EXPIRATION: element expiration time 47168e942e8SPatrick McHardy * @NFT_SET_EXT_USERDATA: user data associated with the element 472f25ad2e9SPatrick McHardy * @NFT_SET_EXT_EXPR: expression assiociated with the element 4738aeff920SPablo Neira Ayuso * @NFT_SET_EXT_OBJREF: stateful object reference associated with element 4743ac4c07aSPatrick McHardy * @NFT_SET_EXT_NUM: number of extension types 4753ac4c07aSPatrick McHardy */ 4763ac4c07aSPatrick McHardy enum nft_set_extensions { 4773ac4c07aSPatrick McHardy NFT_SET_EXT_KEY, 4783ac4c07aSPatrick McHardy NFT_SET_EXT_DATA, 4793ac4c07aSPatrick McHardy NFT_SET_EXT_FLAGS, 480c3e1b005SPatrick McHardy NFT_SET_EXT_TIMEOUT, 481c3e1b005SPatrick McHardy NFT_SET_EXT_EXPIRATION, 48268e942e8SPatrick McHardy NFT_SET_EXT_USERDATA, 483f25ad2e9SPatrick McHardy NFT_SET_EXT_EXPR, 4848aeff920SPablo Neira Ayuso NFT_SET_EXT_OBJREF, 4853ac4c07aSPatrick McHardy NFT_SET_EXT_NUM 4863ac4c07aSPatrick McHardy }; 4873ac4c07aSPatrick McHardy 4883ac4c07aSPatrick McHardy /** 4893ac4c07aSPatrick McHardy * struct nft_set_ext_type - set extension type 4903ac4c07aSPatrick McHardy * 4913ac4c07aSPatrick McHardy * @len: fixed part length of the extension 4923ac4c07aSPatrick McHardy * @align: alignment requirements of the extension 4933ac4c07aSPatrick McHardy */ 4943ac4c07aSPatrick McHardy struct nft_set_ext_type { 4953ac4c07aSPatrick McHardy u8 len; 4963ac4c07aSPatrick McHardy u8 align; 4973ac4c07aSPatrick McHardy }; 4983ac4c07aSPatrick McHardy 4993ac4c07aSPatrick McHardy extern const struct nft_set_ext_type nft_set_ext_types[]; 5003ac4c07aSPatrick McHardy 5013ac4c07aSPatrick McHardy /** 5023ac4c07aSPatrick McHardy * struct nft_set_ext_tmpl - set extension template 5033ac4c07aSPatrick McHardy * 5043ac4c07aSPatrick McHardy * @len: length of extension area 5053ac4c07aSPatrick McHardy * @offset: offsets of individual extension types 5063ac4c07aSPatrick McHardy */ 5073ac4c07aSPatrick McHardy struct nft_set_ext_tmpl { 5083ac4c07aSPatrick McHardy u16 len; 5093ac4c07aSPatrick McHardy u8 offset[NFT_SET_EXT_NUM]; 5103ac4c07aSPatrick McHardy }; 5113ac4c07aSPatrick McHardy 5123ac4c07aSPatrick McHardy /** 5133ac4c07aSPatrick McHardy * struct nft_set_ext - set extensions 5143ac4c07aSPatrick McHardy * 515cc02e457SPatrick McHardy * @genmask: generation mask 5163ac4c07aSPatrick McHardy * @offset: offsets of individual extension types 5173ac4c07aSPatrick McHardy * @data: beginning of extension data 5183ac4c07aSPatrick McHardy */ 5193ac4c07aSPatrick McHardy struct nft_set_ext { 520cc02e457SPatrick McHardy u8 genmask; 5213ac4c07aSPatrick McHardy u8 offset[NFT_SET_EXT_NUM]; 5223ac4c07aSPatrick McHardy char data[0]; 5233ac4c07aSPatrick McHardy }; 5243ac4c07aSPatrick McHardy 5253ac4c07aSPatrick McHardy static inline void nft_set_ext_prepare(struct nft_set_ext_tmpl *tmpl) 5263ac4c07aSPatrick McHardy { 5273ac4c07aSPatrick McHardy memset(tmpl, 0, sizeof(*tmpl)); 5283ac4c07aSPatrick McHardy tmpl->len = sizeof(struct nft_set_ext); 5293ac4c07aSPatrick McHardy } 5303ac4c07aSPatrick McHardy 5313ac4c07aSPatrick McHardy static inline void nft_set_ext_add_length(struct nft_set_ext_tmpl *tmpl, u8 id, 5323ac4c07aSPatrick McHardy unsigned int len) 5333ac4c07aSPatrick McHardy { 5343ac4c07aSPatrick McHardy tmpl->len = ALIGN(tmpl->len, nft_set_ext_types[id].align); 5353ac4c07aSPatrick McHardy BUG_ON(tmpl->len > U8_MAX); 5363ac4c07aSPatrick McHardy tmpl->offset[id] = tmpl->len; 5373ac4c07aSPatrick McHardy tmpl->len += nft_set_ext_types[id].len + len; 5383ac4c07aSPatrick McHardy } 5393ac4c07aSPatrick McHardy 5403ac4c07aSPatrick McHardy static inline void nft_set_ext_add(struct nft_set_ext_tmpl *tmpl, u8 id) 5413ac4c07aSPatrick McHardy { 5423ac4c07aSPatrick McHardy nft_set_ext_add_length(tmpl, id, 0); 5433ac4c07aSPatrick McHardy } 5443ac4c07aSPatrick McHardy 5453ac4c07aSPatrick McHardy static inline void nft_set_ext_init(struct nft_set_ext *ext, 5463ac4c07aSPatrick McHardy const struct nft_set_ext_tmpl *tmpl) 5473ac4c07aSPatrick McHardy { 5483ac4c07aSPatrick McHardy memcpy(ext->offset, tmpl->offset, sizeof(ext->offset)); 5493ac4c07aSPatrick McHardy } 5503ac4c07aSPatrick McHardy 5513ac4c07aSPatrick McHardy static inline bool __nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) 5523ac4c07aSPatrick McHardy { 5533ac4c07aSPatrick McHardy return !!ext->offset[id]; 5543ac4c07aSPatrick McHardy } 5553ac4c07aSPatrick McHardy 5563ac4c07aSPatrick McHardy static inline bool nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) 5573ac4c07aSPatrick McHardy { 5583ac4c07aSPatrick McHardy return ext && __nft_set_ext_exists(ext, id); 5593ac4c07aSPatrick McHardy } 5603ac4c07aSPatrick McHardy 5613ac4c07aSPatrick McHardy static inline void *nft_set_ext(const struct nft_set_ext *ext, u8 id) 5623ac4c07aSPatrick McHardy { 5633ac4c07aSPatrick McHardy return (void *)ext + ext->offset[id]; 5643ac4c07aSPatrick McHardy } 5653ac4c07aSPatrick McHardy 5663ac4c07aSPatrick McHardy static inline struct nft_data *nft_set_ext_key(const struct nft_set_ext *ext) 5673ac4c07aSPatrick McHardy { 5683ac4c07aSPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_KEY); 5693ac4c07aSPatrick McHardy } 5703ac4c07aSPatrick McHardy 5713ac4c07aSPatrick McHardy static inline struct nft_data *nft_set_ext_data(const struct nft_set_ext *ext) 5723ac4c07aSPatrick McHardy { 5733ac4c07aSPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_DATA); 5743ac4c07aSPatrick McHardy } 5753ac4c07aSPatrick McHardy 5763ac4c07aSPatrick McHardy static inline u8 *nft_set_ext_flags(const struct nft_set_ext *ext) 5773ac4c07aSPatrick McHardy { 5783ac4c07aSPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_FLAGS); 5793ac4c07aSPatrick McHardy } 580ef1f7df9SPatrick McHardy 581c3e1b005SPatrick McHardy static inline u64 *nft_set_ext_timeout(const struct nft_set_ext *ext) 582c3e1b005SPatrick McHardy { 583c3e1b005SPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_TIMEOUT); 584c3e1b005SPatrick McHardy } 585c3e1b005SPatrick McHardy 586c3e1b005SPatrick McHardy static inline unsigned long *nft_set_ext_expiration(const struct nft_set_ext *ext) 587c3e1b005SPatrick McHardy { 588c3e1b005SPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_EXPIRATION); 589c3e1b005SPatrick McHardy } 590c3e1b005SPatrick McHardy 59168e942e8SPatrick McHardy static inline struct nft_userdata *nft_set_ext_userdata(const struct nft_set_ext *ext) 59268e942e8SPatrick McHardy { 59368e942e8SPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_USERDATA); 59468e942e8SPatrick McHardy } 59568e942e8SPatrick McHardy 596f25ad2e9SPatrick McHardy static inline struct nft_expr *nft_set_ext_expr(const struct nft_set_ext *ext) 597f25ad2e9SPatrick McHardy { 598f25ad2e9SPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_EXPR); 599f25ad2e9SPatrick McHardy } 600f25ad2e9SPatrick McHardy 601c3e1b005SPatrick McHardy static inline bool nft_set_elem_expired(const struct nft_set_ext *ext) 602c3e1b005SPatrick McHardy { 603c3e1b005SPatrick McHardy return nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION) && 604c3e1b005SPatrick McHardy time_is_before_eq_jiffies(*nft_set_ext_expiration(ext)); 605c3e1b005SPatrick McHardy } 606c3e1b005SPatrick McHardy 607fe2811ebSPatrick McHardy static inline struct nft_set_ext *nft_set_elem_ext(const struct nft_set *set, 608fe2811ebSPatrick McHardy void *elem) 609fe2811ebSPatrick McHardy { 610fe2811ebSPatrick McHardy return elem + set->ops->elemsize; 611fe2811ebSPatrick McHardy } 612fe2811ebSPatrick McHardy 6138aeff920SPablo Neira Ayuso static inline struct nft_object **nft_set_ext_obj(const struct nft_set_ext *ext) 6148aeff920SPablo Neira Ayuso { 6158aeff920SPablo Neira Ayuso return nft_set_ext(ext, NFT_SET_EXT_OBJREF); 6168aeff920SPablo Neira Ayuso } 6178aeff920SPablo Neira Ayuso 61822fe54d5SPatrick McHardy void *nft_set_elem_init(const struct nft_set *set, 61922fe54d5SPatrick McHardy const struct nft_set_ext_tmpl *tmpl, 62049499c3eSPatrick McHardy const u32 *key, const u32 *data, 62122fe54d5SPatrick McHardy u64 timeout, gfp_t gfp); 62261f9e292SLiping Zhang void nft_set_elem_destroy(const struct nft_set *set, void *elem, 62361f9e292SLiping Zhang bool destroy_expr); 62461edafbbSPatrick McHardy 62520a69341SPatrick McHardy /** 626cfed7e1bSPatrick McHardy * struct nft_set_gc_batch_head - nf_tables set garbage collection batch 627cfed7e1bSPatrick McHardy * 628cfed7e1bSPatrick McHardy * @rcu: rcu head 629cfed7e1bSPatrick McHardy * @set: set the elements belong to 630cfed7e1bSPatrick McHardy * @cnt: count of elements 631cfed7e1bSPatrick McHardy */ 632cfed7e1bSPatrick McHardy struct nft_set_gc_batch_head { 633cfed7e1bSPatrick McHardy struct rcu_head rcu; 634cfed7e1bSPatrick McHardy const struct nft_set *set; 635cfed7e1bSPatrick McHardy unsigned int cnt; 636cfed7e1bSPatrick McHardy }; 637cfed7e1bSPatrick McHardy 638cfed7e1bSPatrick McHardy #define NFT_SET_GC_BATCH_SIZE ((PAGE_SIZE - \ 639cfed7e1bSPatrick McHardy sizeof(struct nft_set_gc_batch_head)) / \ 640cfed7e1bSPatrick McHardy sizeof(void *)) 641cfed7e1bSPatrick McHardy 642cfed7e1bSPatrick McHardy /** 643cfed7e1bSPatrick McHardy * struct nft_set_gc_batch - nf_tables set garbage collection batch 644cfed7e1bSPatrick McHardy * 645cfed7e1bSPatrick McHardy * @head: GC batch head 646cfed7e1bSPatrick McHardy * @elems: garbage collection elements 647cfed7e1bSPatrick McHardy */ 648cfed7e1bSPatrick McHardy struct nft_set_gc_batch { 649cfed7e1bSPatrick McHardy struct nft_set_gc_batch_head head; 650cfed7e1bSPatrick McHardy void *elems[NFT_SET_GC_BATCH_SIZE]; 651cfed7e1bSPatrick McHardy }; 652cfed7e1bSPatrick McHardy 653cfed7e1bSPatrick McHardy struct nft_set_gc_batch *nft_set_gc_batch_alloc(const struct nft_set *set, 654cfed7e1bSPatrick McHardy gfp_t gfp); 655cfed7e1bSPatrick McHardy void nft_set_gc_batch_release(struct rcu_head *rcu); 656cfed7e1bSPatrick McHardy 657cfed7e1bSPatrick McHardy static inline void nft_set_gc_batch_complete(struct nft_set_gc_batch *gcb) 658cfed7e1bSPatrick McHardy { 659cfed7e1bSPatrick McHardy if (gcb != NULL) 660cfed7e1bSPatrick McHardy call_rcu(&gcb->head.rcu, nft_set_gc_batch_release); 661cfed7e1bSPatrick McHardy } 662cfed7e1bSPatrick McHardy 663cfed7e1bSPatrick McHardy static inline struct nft_set_gc_batch * 664cfed7e1bSPatrick McHardy nft_set_gc_batch_check(const struct nft_set *set, struct nft_set_gc_batch *gcb, 665cfed7e1bSPatrick McHardy gfp_t gfp) 666cfed7e1bSPatrick McHardy { 667cfed7e1bSPatrick McHardy if (gcb != NULL) { 668cfed7e1bSPatrick McHardy if (gcb->head.cnt + 1 < ARRAY_SIZE(gcb->elems)) 669cfed7e1bSPatrick McHardy return gcb; 670cfed7e1bSPatrick McHardy nft_set_gc_batch_complete(gcb); 671cfed7e1bSPatrick McHardy } 672cfed7e1bSPatrick McHardy return nft_set_gc_batch_alloc(set, gfp); 673cfed7e1bSPatrick McHardy } 674cfed7e1bSPatrick McHardy 675cfed7e1bSPatrick McHardy static inline void nft_set_gc_batch_add(struct nft_set_gc_batch *gcb, 676cfed7e1bSPatrick McHardy void *elem) 677cfed7e1bSPatrick McHardy { 678cfed7e1bSPatrick McHardy gcb->elems[gcb->head.cnt++] = elem; 679cfed7e1bSPatrick McHardy } 680cfed7e1bSPatrick McHardy 681cfed7e1bSPatrick McHardy /** 682ef1f7df9SPatrick McHardy * struct nft_expr_type - nf_tables expression type 68396518518SPatrick McHardy * 684ef1f7df9SPatrick McHardy * @select_ops: function to select nft_expr_ops 685ef1f7df9SPatrick McHardy * @ops: default ops, used when no select_ops functions is present 68696518518SPatrick McHardy * @list: used internally 68796518518SPatrick McHardy * @name: Identifier 68896518518SPatrick McHardy * @owner: module reference 68996518518SPatrick McHardy * @policy: netlink attribute policy 69096518518SPatrick McHardy * @maxattr: highest netlink attribute number 69164d46806SPatrick McHardy * @family: address family for AF-specific types 692151d799aSPatrick McHardy * @flags: expression type flags 693ef1f7df9SPatrick McHardy */ 694ef1f7df9SPatrick McHardy struct nft_expr_type { 6950ca743a5SPablo Neira Ayuso const struct nft_expr_ops *(*select_ops)(const struct nft_ctx *, 6960ca743a5SPablo Neira Ayuso const struct nlattr * const tb[]); 697ef1f7df9SPatrick McHardy const struct nft_expr_ops *ops; 698ef1f7df9SPatrick McHardy struct list_head list; 699ef1f7df9SPatrick McHardy const char *name; 700ef1f7df9SPatrick McHardy struct module *owner; 701ef1f7df9SPatrick McHardy const struct nla_policy *policy; 702ef1f7df9SPatrick McHardy unsigned int maxattr; 70364d46806SPatrick McHardy u8 family; 704151d799aSPatrick McHardy u8 flags; 705ef1f7df9SPatrick McHardy }; 706ef1f7df9SPatrick McHardy 707151d799aSPatrick McHardy #define NFT_EXPR_STATEFUL 0x1 708151d799aSPatrick McHardy 709ef1f7df9SPatrick McHardy /** 710ef1f7df9SPatrick McHardy * struct nft_expr_ops - nf_tables expression operations 711ef1f7df9SPatrick McHardy * 712ef1f7df9SPatrick McHardy * @eval: Expression evaluation function 71396518518SPatrick McHardy * @size: full expression size, including private data size 714ef1f7df9SPatrick McHardy * @init: initialization function 715ef1f7df9SPatrick McHardy * @destroy: destruction function 716ef1f7df9SPatrick McHardy * @dump: function to dump parameters 717ef1f7df9SPatrick McHardy * @type: expression type 7180ca743a5SPablo Neira Ayuso * @validate: validate expression, called during loop detection 7190ca743a5SPablo Neira Ayuso * @data: extra data to attach to this expression operation 72096518518SPatrick McHardy */ 72196518518SPatrick McHardy struct nft_expr; 72296518518SPatrick McHardy struct nft_expr_ops { 72396518518SPatrick McHardy void (*eval)(const struct nft_expr *expr, 724a55e22e9SPatrick McHardy struct nft_regs *regs, 72596518518SPatrick McHardy const struct nft_pktinfo *pkt); 726086f3321SPablo Neira Ayuso int (*clone)(struct nft_expr *dst, 727086f3321SPablo Neira Ayuso const struct nft_expr *src); 728ef1f7df9SPatrick McHardy unsigned int size; 729ef1f7df9SPatrick McHardy 73096518518SPatrick McHardy int (*init)(const struct nft_ctx *ctx, 73196518518SPatrick McHardy const struct nft_expr *expr, 73296518518SPatrick McHardy const struct nlattr * const tb[]); 73362472bceSPatrick McHardy void (*destroy)(const struct nft_ctx *ctx, 73462472bceSPatrick McHardy const struct nft_expr *expr); 73596518518SPatrick McHardy int (*dump)(struct sk_buff *skb, 73696518518SPatrick McHardy const struct nft_expr *expr); 7370ca743a5SPablo Neira Ayuso int (*validate)(const struct nft_ctx *ctx, 7380ca743a5SPablo Neira Ayuso const struct nft_expr *expr, 7390ca743a5SPablo Neira Ayuso const struct nft_data **data); 740ef1f7df9SPatrick McHardy const struct nft_expr_type *type; 7410ca743a5SPablo Neira Ayuso void *data; 74296518518SPatrick McHardy }; 74396518518SPatrick McHardy 744ef1f7df9SPatrick McHardy #define NFT_EXPR_MAXATTR 16 74596518518SPatrick McHardy #define NFT_EXPR_SIZE(size) (sizeof(struct nft_expr) + \ 74696518518SPatrick McHardy ALIGN(size, __alignof__(struct nft_expr))) 74796518518SPatrick McHardy 74896518518SPatrick McHardy /** 74996518518SPatrick McHardy * struct nft_expr - nf_tables expression 75096518518SPatrick McHardy * 75196518518SPatrick McHardy * @ops: expression ops 75296518518SPatrick McHardy * @data: expression private data 75396518518SPatrick McHardy */ 75496518518SPatrick McHardy struct nft_expr { 75596518518SPatrick McHardy const struct nft_expr_ops *ops; 75696518518SPatrick McHardy unsigned char data[]; 75796518518SPatrick McHardy }; 75896518518SPatrick McHardy 75996518518SPatrick McHardy static inline void *nft_expr_priv(const struct nft_expr *expr) 76096518518SPatrick McHardy { 76196518518SPatrick McHardy return (void *)expr->data; 76296518518SPatrick McHardy } 76396518518SPatrick McHardy 7640b2d8a7bSPatrick McHardy struct nft_expr *nft_expr_init(const struct nft_ctx *ctx, 7650b2d8a7bSPatrick McHardy const struct nlattr *nla); 7660b2d8a7bSPatrick McHardy void nft_expr_destroy(const struct nft_ctx *ctx, struct nft_expr *expr); 7670b2d8a7bSPatrick McHardy int nft_expr_dump(struct sk_buff *skb, unsigned int attr, 7680b2d8a7bSPatrick McHardy const struct nft_expr *expr); 7690b2d8a7bSPatrick McHardy 770086f3321SPablo Neira Ayuso static inline int nft_expr_clone(struct nft_expr *dst, struct nft_expr *src) 7710b2d8a7bSPatrick McHardy { 772086f3321SPablo Neira Ayuso int err; 773086f3321SPablo Neira Ayuso 774086f3321SPablo Neira Ayuso if (src->ops->clone) { 775086f3321SPablo Neira Ayuso dst->ops = src->ops; 776086f3321SPablo Neira Ayuso err = src->ops->clone(dst, src); 777086f3321SPablo Neira Ayuso if (err < 0) 778086f3321SPablo Neira Ayuso return err; 779086f3321SPablo Neira Ayuso } else { 7800b2d8a7bSPatrick McHardy memcpy(dst, src, src->ops->size); 7810b2d8a7bSPatrick McHardy } 78261f9e292SLiping Zhang 78361f9e292SLiping Zhang __module_get(src->ops->type->owner); 784086f3321SPablo Neira Ayuso return 0; 785086f3321SPablo Neira Ayuso } 7860b2d8a7bSPatrick McHardy 78796518518SPatrick McHardy /** 78896518518SPatrick McHardy * struct nft_rule - nf_tables rule 78996518518SPatrick McHardy * 79096518518SPatrick McHardy * @list: used internally 79196518518SPatrick McHardy * @handle: rule handle 7920628b123SPablo Neira Ayuso * @genmask: generation mask 79396518518SPatrick McHardy * @dlen: length of expression data 79486f1ec32SPatrick McHardy * @udata: user data is appended to the rule 79596518518SPatrick McHardy * @data: expression data 79696518518SPatrick McHardy */ 79796518518SPatrick McHardy struct nft_rule { 79896518518SPatrick McHardy struct list_head list; 7990768b3b3SPablo Neira Ayuso u64 handle:42, 8000628b123SPablo Neira Ayuso genmask:2, 8010768b3b3SPablo Neira Ayuso dlen:12, 80286f1ec32SPatrick McHardy udata:1; 80396518518SPatrick McHardy unsigned char data[] 80496518518SPatrick McHardy __attribute__((aligned(__alignof__(struct nft_expr)))); 80596518518SPatrick McHardy }; 80696518518SPatrick McHardy 80796518518SPatrick McHardy static inline struct nft_expr *nft_expr_first(const struct nft_rule *rule) 80896518518SPatrick McHardy { 80996518518SPatrick McHardy return (struct nft_expr *)&rule->data[0]; 81096518518SPatrick McHardy } 81196518518SPatrick McHardy 81296518518SPatrick McHardy static inline struct nft_expr *nft_expr_next(const struct nft_expr *expr) 81396518518SPatrick McHardy { 81496518518SPatrick McHardy return ((void *)expr) + expr->ops->size; 81596518518SPatrick McHardy } 81696518518SPatrick McHardy 81796518518SPatrick McHardy static inline struct nft_expr *nft_expr_last(const struct nft_rule *rule) 81896518518SPatrick McHardy { 81996518518SPatrick McHardy return (struct nft_expr *)&rule->data[rule->dlen]; 82096518518SPatrick McHardy } 82196518518SPatrick McHardy 82286f1ec32SPatrick McHardy static inline struct nft_userdata *nft_userdata(const struct nft_rule *rule) 8230768b3b3SPablo Neira Ayuso { 8240768b3b3SPablo Neira Ayuso return (void *)&rule->data[rule->dlen]; 8250768b3b3SPablo Neira Ayuso } 8260768b3b3SPablo Neira Ayuso 82796518518SPatrick McHardy /* 82896518518SPatrick McHardy * The last pointer isn't really necessary, but the compiler isn't able to 82996518518SPatrick McHardy * determine that the result of nft_expr_last() is always the same since it 83096518518SPatrick McHardy * can't assume that the dlen value wasn't changed within calls in the loop. 83196518518SPatrick McHardy */ 83296518518SPatrick McHardy #define nft_rule_for_each_expr(expr, last, rule) \ 83396518518SPatrick McHardy for ((expr) = nft_expr_first(rule), (last) = nft_expr_last(rule); \ 83496518518SPatrick McHardy (expr) != (last); \ 83596518518SPatrick McHardy (expr) = nft_expr_next(expr)) 83696518518SPatrick McHardy 83796518518SPatrick McHardy enum nft_chain_flags { 83896518518SPatrick McHardy NFT_BASE_CHAIN = 0x1, 83996518518SPatrick McHardy }; 84096518518SPatrick McHardy 84196518518SPatrick McHardy /** 84296518518SPatrick McHardy * struct nft_chain - nf_tables chain 84396518518SPatrick McHardy * 84496518518SPatrick McHardy * @rules: list of rules in the chain 84596518518SPatrick McHardy * @list: used internally 846b5bc89bfSPablo Neira Ayuso * @table: table that this chain belongs to 84796518518SPatrick McHardy * @handle: chain handle 84896518518SPatrick McHardy * @use: number of jump references to this chain 84996518518SPatrick McHardy * @level: length of longest path to this chain 850a0a7379eSPablo Neira Ayuso * @flags: bitmask of enum nft_chain_flags 85196518518SPatrick McHardy * @name: name of the chain 85296518518SPatrick McHardy */ 85396518518SPatrick McHardy struct nft_chain { 85496518518SPatrick McHardy struct list_head rules; 85596518518SPatrick McHardy struct list_head list; 856b5bc89bfSPablo Neira Ayuso struct nft_table *table; 85796518518SPatrick McHardy u64 handle; 858a0a7379eSPablo Neira Ayuso u32 use; 85996518518SPatrick McHardy u16 level; 860664b0f8cSPablo Neira Ayuso u8 flags:6, 861664b0f8cSPablo Neira Ayuso genmask:2; 86296518518SPatrick McHardy char name[NFT_CHAIN_MAXNAMELEN]; 86396518518SPatrick McHardy }; 86496518518SPatrick McHardy 8659370761cSPablo Neira Ayuso enum nft_chain_type { 8669370761cSPablo Neira Ayuso NFT_CHAIN_T_DEFAULT = 0, 8679370761cSPablo Neira Ayuso NFT_CHAIN_T_ROUTE, 8689370761cSPablo Neira Ayuso NFT_CHAIN_T_NAT, 8699370761cSPablo Neira Ayuso NFT_CHAIN_T_MAX 8709370761cSPablo Neira Ayuso }; 8719370761cSPablo Neira Ayuso 8721a1e1a12SPatrick McHardy /** 8731a1e1a12SPatrick McHardy * struct nf_chain_type - nf_tables chain type info 8741a1e1a12SPatrick McHardy * 8751a1e1a12SPatrick McHardy * @name: name of the type 8761a1e1a12SPatrick McHardy * @type: numeric identifier 8771a1e1a12SPatrick McHardy * @family: address family 8781a1e1a12SPatrick McHardy * @owner: module owner 8791a1e1a12SPatrick McHardy * @hook_mask: mask of valid hooks 8801a1e1a12SPatrick McHardy * @hooks: hookfn overrides 8811a1e1a12SPatrick McHardy */ 8821a1e1a12SPatrick McHardy struct nf_chain_type { 8831a1e1a12SPatrick McHardy const char *name; 8841a1e1a12SPatrick McHardy enum nft_chain_type type; 8851a1e1a12SPatrick McHardy int family; 8861a1e1a12SPatrick McHardy struct module *owner; 8871a1e1a12SPatrick McHardy unsigned int hook_mask; 8881a1e1a12SPatrick McHardy nf_hookfn *hooks[NF_MAX_HOOKS]; 8891a1e1a12SPatrick McHardy }; 8901a1e1a12SPatrick McHardy 8917210e4e3SPablo Neira Ayuso int nft_chain_validate_dependency(const struct nft_chain *chain, 8927210e4e3SPablo Neira Ayuso enum nft_chain_type type); 89375e8d06dSPablo Neira Ayuso int nft_chain_validate_hooks(const struct nft_chain *chain, 89475e8d06dSPablo Neira Ayuso unsigned int hook_flags); 8957210e4e3SPablo Neira Ayuso 8960ca743a5SPablo Neira Ayuso struct nft_stats { 8970ca743a5SPablo Neira Ayuso u64 bytes; 8980ca743a5SPablo Neira Ayuso u64 pkts; 899ce355e20SEric Dumazet struct u64_stats_sync syncp; 9000ca743a5SPablo Neira Ayuso }; 9010ca743a5SPablo Neira Ayuso 902115a60b1SPatrick McHardy #define NFT_HOOK_OPS_MAX 2 903115a60b1SPatrick McHardy 90496518518SPatrick McHardy /** 90596518518SPatrick McHardy * struct nft_base_chain - nf_tables base chain 90696518518SPatrick McHardy * 90796518518SPatrick McHardy * @ops: netfilter hook ops 9089370761cSPablo Neira Ayuso * @type: chain type 9090ca743a5SPablo Neira Ayuso * @policy: default policy 9100ca743a5SPablo Neira Ayuso * @stats: per-cpu chain stats 91196518518SPatrick McHardy * @chain: the chain 9122cbce139SPablo Neira Ayuso * @dev_name: device name that this base chain is attached to (if any) 91396518518SPatrick McHardy */ 91496518518SPatrick McHardy struct nft_base_chain { 915115a60b1SPatrick McHardy struct nf_hook_ops ops[NFT_HOOK_OPS_MAX]; 9162a37d755SPatrick McHardy const struct nf_chain_type *type; 9170ca743a5SPablo Neira Ayuso u8 policy; 918835b8033SPablo Neira Ayuso u8 flags; 9190ca743a5SPablo Neira Ayuso struct nft_stats __percpu *stats; 92096518518SPatrick McHardy struct nft_chain chain; 9212cbce139SPablo Neira Ayuso char dev_name[IFNAMSIZ]; 92296518518SPatrick McHardy }; 92396518518SPatrick McHardy 92496518518SPatrick McHardy static inline struct nft_base_chain *nft_base_chain(const struct nft_chain *chain) 92596518518SPatrick McHardy { 92696518518SPatrick McHardy return container_of(chain, struct nft_base_chain, chain); 92796518518SPatrick McHardy } 92896518518SPatrick McHardy 929f323d954SPablo Neira Ayuso static inline bool nft_is_base_chain(const struct nft_chain *chain) 930f323d954SPablo Neira Ayuso { 931f323d954SPablo Neira Ayuso return chain->flags & NFT_BASE_CHAIN; 932f323d954SPablo Neira Ayuso } 933f323d954SPablo Neira Ayuso 9345ebe0b0eSPablo Neira Ayuso int __nft_release_basechain(struct nft_ctx *ctx); 935835b8033SPablo Neira Ayuso 93606198b34SEric W. Biederman unsigned int nft_do_chain(struct nft_pktinfo *pkt, void *priv); 93796518518SPatrick McHardy 93896518518SPatrick McHardy /** 93996518518SPatrick McHardy * struct nft_table - nf_tables table 94096518518SPatrick McHardy * 94196518518SPatrick McHardy * @list: used internally 94296518518SPatrick McHardy * @chains: chains in the table 94396518518SPatrick McHardy * @sets: sets in the table 944e5009240SPablo Neira Ayuso * @objects: stateful objects in the table 94596518518SPatrick McHardy * @hgenerator: handle generator state 94696518518SPatrick McHardy * @use: number of chain references to this table 94796518518SPatrick McHardy * @flags: table flag (see enum nft_table_flags) 948f2a6d766SPablo Neira Ayuso * @genmask: generation mask 94996518518SPatrick McHardy * @name: name of the table 95096518518SPatrick McHardy */ 95196518518SPatrick McHardy struct nft_table { 95296518518SPatrick McHardy struct list_head list; 95396518518SPatrick McHardy struct list_head chains; 95496518518SPatrick McHardy struct list_head sets; 955e5009240SPablo Neira Ayuso struct list_head objects; 95696518518SPatrick McHardy u64 hgenerator; 95796518518SPatrick McHardy u32 use; 958f2a6d766SPablo Neira Ayuso u16 flags:14, 959f2a6d766SPablo Neira Ayuso genmask:2; 960e46abbccSPhil Sutter char *name; 961ebddf1a8SPablo Neira Ayuso }; 962ebddf1a8SPablo Neira Ayuso 963ebddf1a8SPablo Neira Ayuso enum nft_af_flags { 964ebddf1a8SPablo Neira Ayuso NFT_AF_NEEDS_DEV = (1 << 0), 96596518518SPatrick McHardy }; 96696518518SPatrick McHardy 96796518518SPatrick McHardy /** 96896518518SPatrick McHardy * struct nft_af_info - nf_tables address family info 96996518518SPatrick McHardy * 97096518518SPatrick McHardy * @list: used internally 97196518518SPatrick McHardy * @family: address family 97296518518SPatrick McHardy * @nhooks: number of hooks in this family 97396518518SPatrick McHardy * @owner: module owner 97496518518SPatrick McHardy * @tables: used internally 975ebddf1a8SPablo Neira Ayuso * @flags: family flags 976115a60b1SPatrick McHardy * @nops: number of hook ops in this family 977115a60b1SPatrick McHardy * @hook_ops_init: initialization function for chain hook ops 97896518518SPatrick McHardy * @hooks: hookfn overrides for packet validation 97996518518SPatrick McHardy */ 98096518518SPatrick McHardy struct nft_af_info { 98196518518SPatrick McHardy struct list_head list; 98296518518SPatrick McHardy int family; 98396518518SPatrick McHardy unsigned int nhooks; 98496518518SPatrick McHardy struct module *owner; 98596518518SPatrick McHardy struct list_head tables; 986ebddf1a8SPablo Neira Ayuso u32 flags; 987115a60b1SPatrick McHardy unsigned int nops; 988115a60b1SPatrick McHardy void (*hook_ops_init)(struct nf_hook_ops *, 989115a60b1SPatrick McHardy unsigned int); 99096518518SPatrick McHardy nf_hookfn *hooks[NF_MAX_HOOKS]; 99196518518SPatrick McHardy }; 99296518518SPatrick McHardy 9935eccdfaaSJoe Perches int nft_register_afinfo(struct net *, struct nft_af_info *); 994df05ef87SPablo Neira Ayuso void nft_unregister_afinfo(struct net *, struct nft_af_info *); 99596518518SPatrick McHardy 9962a37d755SPatrick McHardy int nft_register_chain_type(const struct nf_chain_type *); 9972a37d755SPatrick McHardy void nft_unregister_chain_type(const struct nf_chain_type *); 99896518518SPatrick McHardy 9995eccdfaaSJoe Perches int nft_register_expr(struct nft_expr_type *); 10005eccdfaaSJoe Perches void nft_unregister_expr(struct nft_expr_type *); 100196518518SPatrick McHardy 100233d5a7b1SFlorian Westphal int nft_verdict_dump(struct sk_buff *skb, int type, 100333d5a7b1SFlorian Westphal const struct nft_verdict *v); 100433d5a7b1SFlorian Westphal 100533d5a7b1SFlorian Westphal /** 1006e5009240SPablo Neira Ayuso * struct nft_object - nf_tables stateful object 1007e5009240SPablo Neira Ayuso * 1008e5009240SPablo Neira Ayuso * @list: table stateful object list node 100918965317SPablo Neira Ayuso * @table: table this object belongs to 1010e5009240SPablo Neira Ayuso * @type: pointer to object type 1011e5009240SPablo Neira Ayuso * @data: pointer to object data 1012e5009240SPablo Neira Ayuso * @name: name of this stateful object 1013e5009240SPablo Neira Ayuso * @genmask: generation mask 1014e5009240SPablo Neira Ayuso * @use: number of references to this stateful object 1015e5009240SPablo Neira Ayuso * @data: object data, layout depends on type 1016e5009240SPablo Neira Ayuso */ 1017e5009240SPablo Neira Ayuso struct nft_object { 1018e5009240SPablo Neira Ayuso struct list_head list; 1019e5009240SPablo Neira Ayuso char name[NFT_OBJ_MAXNAMELEN]; 102018965317SPablo Neira Ayuso struct nft_table *table; 1021e5009240SPablo Neira Ayuso u32 genmask:2, 1022e5009240SPablo Neira Ayuso use:30; 1023e5009240SPablo Neira Ayuso /* runtime data below here */ 1024e5009240SPablo Neira Ayuso const struct nft_object_type *type ____cacheline_aligned; 1025e5009240SPablo Neira Ayuso unsigned char data[] 1026e5009240SPablo Neira Ayuso __attribute__((aligned(__alignof__(u64)))); 1027e5009240SPablo Neira Ayuso }; 1028e5009240SPablo Neira Ayuso 1029e5009240SPablo Neira Ayuso static inline void *nft_obj_data(const struct nft_object *obj) 1030e5009240SPablo Neira Ayuso { 1031e5009240SPablo Neira Ayuso return (void *)obj->data; 1032e5009240SPablo Neira Ayuso } 1033e5009240SPablo Neira Ayuso 1034e5009240SPablo Neira Ayuso #define nft_expr_obj(expr) *((struct nft_object **)nft_expr_priv(expr)) 1035e5009240SPablo Neira Ayuso 1036e5009240SPablo Neira Ayuso struct nft_object *nf_tables_obj_lookup(const struct nft_table *table, 1037e5009240SPablo Neira Ayuso const struct nlattr *nla, u32 objtype, 1038e5009240SPablo Neira Ayuso u8 genmask); 1039e5009240SPablo Neira Ayuso 104025e94a99SPablo Neira Ayuso void nft_obj_notify(struct net *net, struct nft_table *table, 10412599e989SPablo Neira Ayuso struct nft_object *obj, u32 portid, u32 seq, 10422599e989SPablo Neira Ayuso int event, int family, int report, gfp_t gfp); 10432599e989SPablo Neira Ayuso 1044e5009240SPablo Neira Ayuso /** 1045e5009240SPablo Neira Ayuso * struct nft_object_type - stateful object type 1046e5009240SPablo Neira Ayuso * 1047e5009240SPablo Neira Ayuso * @eval: stateful object evaluation function 1048e5009240SPablo Neira Ayuso * @list: list node in list of object types 1049e5009240SPablo Neira Ayuso * @type: stateful object numeric type 1050e5009240SPablo Neira Ayuso * @size: stateful object size 1051e5009240SPablo Neira Ayuso * @owner: module owner 1052e5009240SPablo Neira Ayuso * @maxattr: maximum netlink attribute 1053e5009240SPablo Neira Ayuso * @policy: netlink attribute policy 1054e5009240SPablo Neira Ayuso * @init: initialize object from netlink attributes 1055e5009240SPablo Neira Ayuso * @destroy: release existing stateful object 1056e5009240SPablo Neira Ayuso * @dump: netlink dump stateful object 1057e5009240SPablo Neira Ayuso */ 1058e5009240SPablo Neira Ayuso struct nft_object_type { 1059e5009240SPablo Neira Ayuso void (*eval)(struct nft_object *obj, 1060e5009240SPablo Neira Ayuso struct nft_regs *regs, 1061e5009240SPablo Neira Ayuso const struct nft_pktinfo *pkt); 1062e5009240SPablo Neira Ayuso struct list_head list; 1063e5009240SPablo Neira Ayuso u32 type; 1064e5009240SPablo Neira Ayuso unsigned int size; 1065e5009240SPablo Neira Ayuso unsigned int maxattr; 1066e5009240SPablo Neira Ayuso struct module *owner; 1067e5009240SPablo Neira Ayuso const struct nla_policy *policy; 106884fba055SFlorian Westphal int (*init)(const struct nft_ctx *ctx, 106984fba055SFlorian Westphal const struct nlattr *const tb[], 1070e5009240SPablo Neira Ayuso struct nft_object *obj); 1071e5009240SPablo Neira Ayuso void (*destroy)(struct nft_object *obj); 1072e5009240SPablo Neira Ayuso int (*dump)(struct sk_buff *skb, 107343da04a5SPablo Neira Ayuso struct nft_object *obj, 107443da04a5SPablo Neira Ayuso bool reset); 1075e5009240SPablo Neira Ayuso }; 1076e5009240SPablo Neira Ayuso 1077e5009240SPablo Neira Ayuso int nft_register_obj(struct nft_object_type *obj_type); 1078e5009240SPablo Neira Ayuso void nft_unregister_obj(struct nft_object_type *obj_type); 1079e5009240SPablo Neira Ayuso 1080e5009240SPablo Neira Ayuso /** 108133d5a7b1SFlorian Westphal * struct nft_traceinfo - nft tracing information and state 108233d5a7b1SFlorian Westphal * 108333d5a7b1SFlorian Westphal * @pkt: pktinfo currently processed 108433d5a7b1SFlorian Westphal * @basechain: base chain currently processed 108533d5a7b1SFlorian Westphal * @chain: chain currently processed 108633d5a7b1SFlorian Westphal * @rule: rule that was evaluated 108733d5a7b1SFlorian Westphal * @verdict: verdict given by rule 108833d5a7b1SFlorian Westphal * @type: event type (enum nft_trace_types) 108933d5a7b1SFlorian Westphal * @packet_dumped: packet headers sent in a previous traceinfo message 109033d5a7b1SFlorian Westphal * @trace: other struct members are initialised 109133d5a7b1SFlorian Westphal */ 109233d5a7b1SFlorian Westphal struct nft_traceinfo { 109333d5a7b1SFlorian Westphal const struct nft_pktinfo *pkt; 109433d5a7b1SFlorian Westphal const struct nft_base_chain *basechain; 109533d5a7b1SFlorian Westphal const struct nft_chain *chain; 109633d5a7b1SFlorian Westphal const struct nft_rule *rule; 109733d5a7b1SFlorian Westphal const struct nft_verdict *verdict; 109833d5a7b1SFlorian Westphal enum nft_trace_types type; 109933d5a7b1SFlorian Westphal bool packet_dumped; 110033d5a7b1SFlorian Westphal bool trace; 110133d5a7b1SFlorian Westphal }; 110233d5a7b1SFlorian Westphal 110333d5a7b1SFlorian Westphal void nft_trace_init(struct nft_traceinfo *info, const struct nft_pktinfo *pkt, 110433d5a7b1SFlorian Westphal const struct nft_verdict *verdict, 110533d5a7b1SFlorian Westphal const struct nft_chain *basechain); 110633d5a7b1SFlorian Westphal 110733d5a7b1SFlorian Westphal void nft_trace_notify(struct nft_traceinfo *info); 110833d5a7b1SFlorian Westphal 110967a8fc27SPatrick McHardy #define nft_dereference(p) \ 111067a8fc27SPatrick McHardy nfnl_dereference(p, NFNL_SUBSYS_NFTABLES) 111167a8fc27SPatrick McHardy 111296518518SPatrick McHardy #define MODULE_ALIAS_NFT_FAMILY(family) \ 111396518518SPatrick McHardy MODULE_ALIAS("nft-afinfo-" __stringify(family)) 111496518518SPatrick McHardy 11159370761cSPablo Neira Ayuso #define MODULE_ALIAS_NFT_CHAIN(family, name) \ 11169370761cSPablo Neira Ayuso MODULE_ALIAS("nft-chain-" __stringify(family) "-" name) 111796518518SPatrick McHardy 111864d46806SPatrick McHardy #define MODULE_ALIAS_NFT_AF_EXPR(family, name) \ 111964d46806SPatrick McHardy MODULE_ALIAS("nft-expr-" __stringify(family) "-" name) 112064d46806SPatrick McHardy 112196518518SPatrick McHardy #define MODULE_ALIAS_NFT_EXPR(name) \ 112296518518SPatrick McHardy MODULE_ALIAS("nft-expr-" name) 112396518518SPatrick McHardy 112420a69341SPatrick McHardy #define MODULE_ALIAS_NFT_SET() \ 112520a69341SPatrick McHardy MODULE_ALIAS("nft-set") 112620a69341SPatrick McHardy 1127e5009240SPablo Neira Ayuso #define MODULE_ALIAS_NFT_OBJ(type) \ 1128e5009240SPablo Neira Ayuso MODULE_ALIAS("nft-obj-" __stringify(type)) 1129e5009240SPablo Neira Ayuso 1130ea4bd995SPatrick McHardy /* 1131ea4bd995SPatrick McHardy * The gencursor defines two generations, the currently active and the 1132ea4bd995SPatrick McHardy * next one. Objects contain a bitmask of 2 bits specifying the generations 1133ea4bd995SPatrick McHardy * they're active in. A set bit means they're inactive in the generation 1134ea4bd995SPatrick McHardy * represented by that bit. 1135ea4bd995SPatrick McHardy * 1136ea4bd995SPatrick McHardy * New objects start out as inactive in the current and active in the 1137ea4bd995SPatrick McHardy * next generation. When committing the ruleset the bitmask is cleared, 1138ea4bd995SPatrick McHardy * meaning they're active in all generations. When removing an object, 1139ea4bd995SPatrick McHardy * it is set inactive in the next generation. After committing the ruleset, 1140ea4bd995SPatrick McHardy * the objects are removed. 1141ea4bd995SPatrick McHardy */ 1142ea4bd995SPatrick McHardy static inline unsigned int nft_gencursor_next(const struct net *net) 1143ea4bd995SPatrick McHardy { 1144ea4bd995SPatrick McHardy return net->nft.gencursor + 1 == 1 ? 1 : 0; 1145ea4bd995SPatrick McHardy } 1146ea4bd995SPatrick McHardy 1147ea4bd995SPatrick McHardy static inline u8 nft_genmask_next(const struct net *net) 1148ea4bd995SPatrick McHardy { 1149ea4bd995SPatrick McHardy return 1 << nft_gencursor_next(net); 1150ea4bd995SPatrick McHardy } 1151ea4bd995SPatrick McHardy 1152ea4bd995SPatrick McHardy static inline u8 nft_genmask_cur(const struct net *net) 1153ea4bd995SPatrick McHardy { 1154ea4bd995SPatrick McHardy /* Use ACCESS_ONCE() to prevent refetching the value for atomicity */ 1155ea4bd995SPatrick McHardy return 1 << ACCESS_ONCE(net->nft.gencursor); 1156ea4bd995SPatrick McHardy } 1157ea4bd995SPatrick McHardy 115822fe54d5SPatrick McHardy #define NFT_GENMASK_ANY ((1 << 0) | (1 << 1)) 115922fe54d5SPatrick McHardy 1160cc02e457SPatrick McHardy /* 1161889f7ee7SPablo Neira Ayuso * Generic transaction helpers 1162889f7ee7SPablo Neira Ayuso */ 1163889f7ee7SPablo Neira Ayuso 1164889f7ee7SPablo Neira Ayuso /* Check if this object is currently active. */ 1165889f7ee7SPablo Neira Ayuso #define nft_is_active(__net, __obj) \ 1166889f7ee7SPablo Neira Ayuso (((__obj)->genmask & nft_genmask_cur(__net)) == 0) 1167889f7ee7SPablo Neira Ayuso 1168889f7ee7SPablo Neira Ayuso /* Check if this object is active in the next generation. */ 1169889f7ee7SPablo Neira Ayuso #define nft_is_active_next(__net, __obj) \ 1170889f7ee7SPablo Neira Ayuso (((__obj)->genmask & nft_genmask_next(__net)) == 0) 1171889f7ee7SPablo Neira Ayuso 1172889f7ee7SPablo Neira Ayuso /* This object becomes active in the next generation. */ 1173889f7ee7SPablo Neira Ayuso #define nft_activate_next(__net, __obj) \ 1174889f7ee7SPablo Neira Ayuso (__obj)->genmask = nft_genmask_cur(__net) 1175889f7ee7SPablo Neira Ayuso 1176889f7ee7SPablo Neira Ayuso /* This object becomes inactive in the next generation. */ 1177889f7ee7SPablo Neira Ayuso #define nft_deactivate_next(__net, __obj) \ 1178889f7ee7SPablo Neira Ayuso (__obj)->genmask = nft_genmask_next(__net) 1179889f7ee7SPablo Neira Ayuso 1180889f7ee7SPablo Neira Ayuso /* After committing the ruleset, clear the stale generation bit. */ 1181889f7ee7SPablo Neira Ayuso #define nft_clear(__net, __obj) \ 1182889f7ee7SPablo Neira Ayuso (__obj)->genmask &= ~nft_genmask_next(__net) 1183f2a6d766SPablo Neira Ayuso #define nft_active_genmask(__obj, __genmask) \ 1184f2a6d766SPablo Neira Ayuso !((__obj)->genmask & __genmask) 1185889f7ee7SPablo Neira Ayuso 1186889f7ee7SPablo Neira Ayuso /* 1187cc02e457SPatrick McHardy * Set element transaction helpers 1188cc02e457SPatrick McHardy */ 1189cc02e457SPatrick McHardy 1190cc02e457SPatrick McHardy static inline bool nft_set_elem_active(const struct nft_set_ext *ext, 1191cc02e457SPatrick McHardy u8 genmask) 1192cc02e457SPatrick McHardy { 1193cc02e457SPatrick McHardy return !(ext->genmask & genmask); 1194cc02e457SPatrick McHardy } 1195cc02e457SPatrick McHardy 119642a55769SPablo Neira Ayuso static inline void nft_set_elem_change_active(const struct net *net, 119742a55769SPablo Neira Ayuso const struct nft_set *set, 1198cc02e457SPatrick McHardy struct nft_set_ext *ext) 1199cc02e457SPatrick McHardy { 120042a55769SPablo Neira Ayuso ext->genmask ^= nft_genmask_next(net); 1201cc02e457SPatrick McHardy } 1202cc02e457SPatrick McHardy 120369086658SPatrick McHardy /* 120469086658SPatrick McHardy * We use a free bit in the genmask field to indicate the element 120569086658SPatrick McHardy * is busy, meaning it is currently being processed either by 120669086658SPatrick McHardy * the netlink API or GC. 120769086658SPatrick McHardy * 120869086658SPatrick McHardy * Even though the genmask is only a single byte wide, this works 120969086658SPatrick McHardy * because the extension structure if fully constant once initialized, 121069086658SPatrick McHardy * so there are no non-atomic write accesses unless it is already 121169086658SPatrick McHardy * marked busy. 121269086658SPatrick McHardy */ 121369086658SPatrick McHardy #define NFT_SET_ELEM_BUSY_MASK (1 << 2) 121469086658SPatrick McHardy 121569086658SPatrick McHardy #if defined(__LITTLE_ENDIAN_BITFIELD) 121669086658SPatrick McHardy #define NFT_SET_ELEM_BUSY_BIT 2 121769086658SPatrick McHardy #elif defined(__BIG_ENDIAN_BITFIELD) 121869086658SPatrick McHardy #define NFT_SET_ELEM_BUSY_BIT (BITS_PER_LONG - BITS_PER_BYTE + 2) 121969086658SPatrick McHardy #else 122069086658SPatrick McHardy #error 122169086658SPatrick McHardy #endif 122269086658SPatrick McHardy 122369086658SPatrick McHardy static inline int nft_set_elem_mark_busy(struct nft_set_ext *ext) 122469086658SPatrick McHardy { 122569086658SPatrick McHardy unsigned long *word = (unsigned long *)ext; 122669086658SPatrick McHardy 122769086658SPatrick McHardy BUILD_BUG_ON(offsetof(struct nft_set_ext, genmask) != 0); 122869086658SPatrick McHardy return test_and_set_bit(NFT_SET_ELEM_BUSY_BIT, word); 122969086658SPatrick McHardy } 123069086658SPatrick McHardy 123169086658SPatrick McHardy static inline void nft_set_elem_clear_busy(struct nft_set_ext *ext) 123269086658SPatrick McHardy { 123369086658SPatrick McHardy unsigned long *word = (unsigned long *)ext; 123469086658SPatrick McHardy 123569086658SPatrick McHardy clear_bit(NFT_SET_ELEM_BUSY_BIT, word); 123669086658SPatrick McHardy } 123769086658SPatrick McHardy 12381a1e1a12SPatrick McHardy /** 12391a1e1a12SPatrick McHardy * struct nft_trans - nf_tables object update in transaction 12401a1e1a12SPatrick McHardy * 12411a1e1a12SPatrick McHardy * @list: used internally 12421a1e1a12SPatrick McHardy * @msg_type: message type 12431a1e1a12SPatrick McHardy * @ctx: transaction context 12441a1e1a12SPatrick McHardy * @data: internal information related to the transaction 12451a1e1a12SPatrick McHardy */ 12461a1e1a12SPatrick McHardy struct nft_trans { 12471a1e1a12SPatrick McHardy struct list_head list; 12481a1e1a12SPatrick McHardy int msg_type; 12491a1e1a12SPatrick McHardy struct nft_ctx ctx; 12501a1e1a12SPatrick McHardy char data[0]; 12511a1e1a12SPatrick McHardy }; 12521a1e1a12SPatrick McHardy 12531a1e1a12SPatrick McHardy struct nft_trans_rule { 12541a1e1a12SPatrick McHardy struct nft_rule *rule; 12551a94e38dSPablo Neira Ayuso u32 rule_id; 12561a1e1a12SPatrick McHardy }; 12571a1e1a12SPatrick McHardy 12581a1e1a12SPatrick McHardy #define nft_trans_rule(trans) \ 12591a1e1a12SPatrick McHardy (((struct nft_trans_rule *)trans->data)->rule) 12601a94e38dSPablo Neira Ayuso #define nft_trans_rule_id(trans) \ 12611a94e38dSPablo Neira Ayuso (((struct nft_trans_rule *)trans->data)->rule_id) 12621a1e1a12SPatrick McHardy 12631a1e1a12SPatrick McHardy struct nft_trans_set { 12641a1e1a12SPatrick McHardy struct nft_set *set; 12651a1e1a12SPatrick McHardy u32 set_id; 12661a1e1a12SPatrick McHardy }; 12671a1e1a12SPatrick McHardy 12681a1e1a12SPatrick McHardy #define nft_trans_set(trans) \ 12691a1e1a12SPatrick McHardy (((struct nft_trans_set *)trans->data)->set) 12701a1e1a12SPatrick McHardy #define nft_trans_set_id(trans) \ 12711a1e1a12SPatrick McHardy (((struct nft_trans_set *)trans->data)->set_id) 12721a1e1a12SPatrick McHardy 12731a1e1a12SPatrick McHardy struct nft_trans_chain { 12741a1e1a12SPatrick McHardy bool update; 12751a1e1a12SPatrick McHardy char name[NFT_CHAIN_MAXNAMELEN]; 12761a1e1a12SPatrick McHardy struct nft_stats __percpu *stats; 12771a1e1a12SPatrick McHardy u8 policy; 12781a1e1a12SPatrick McHardy }; 12791a1e1a12SPatrick McHardy 12801a1e1a12SPatrick McHardy #define nft_trans_chain_update(trans) \ 12811a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->update) 12821a1e1a12SPatrick McHardy #define nft_trans_chain_name(trans) \ 12831a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->name) 12841a1e1a12SPatrick McHardy #define nft_trans_chain_stats(trans) \ 12851a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->stats) 12861a1e1a12SPatrick McHardy #define nft_trans_chain_policy(trans) \ 12871a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->policy) 12881a1e1a12SPatrick McHardy 12891a1e1a12SPatrick McHardy struct nft_trans_table { 12901a1e1a12SPatrick McHardy bool update; 12911a1e1a12SPatrick McHardy bool enable; 12921a1e1a12SPatrick McHardy }; 12931a1e1a12SPatrick McHardy 12941a1e1a12SPatrick McHardy #define nft_trans_table_update(trans) \ 12951a1e1a12SPatrick McHardy (((struct nft_trans_table *)trans->data)->update) 12961a1e1a12SPatrick McHardy #define nft_trans_table_enable(trans) \ 12971a1e1a12SPatrick McHardy (((struct nft_trans_table *)trans->data)->enable) 12981a1e1a12SPatrick McHardy 12991a1e1a12SPatrick McHardy struct nft_trans_elem { 13001a1e1a12SPatrick McHardy struct nft_set *set; 13011a1e1a12SPatrick McHardy struct nft_set_elem elem; 13021a1e1a12SPatrick McHardy }; 13031a1e1a12SPatrick McHardy 13041a1e1a12SPatrick McHardy #define nft_trans_elem_set(trans) \ 13051a1e1a12SPatrick McHardy (((struct nft_trans_elem *)trans->data)->set) 13061a1e1a12SPatrick McHardy #define nft_trans_elem(trans) \ 13071a1e1a12SPatrick McHardy (((struct nft_trans_elem *)trans->data)->elem) 13081a1e1a12SPatrick McHardy 1309e5009240SPablo Neira Ayuso struct nft_trans_obj { 1310e5009240SPablo Neira Ayuso struct nft_object *obj; 1311e5009240SPablo Neira Ayuso }; 1312e5009240SPablo Neira Ayuso 1313e5009240SPablo Neira Ayuso #define nft_trans_obj(trans) \ 1314e5009240SPablo Neira Ayuso (((struct nft_trans_obj *)trans->data)->obj) 1315e5009240SPablo Neira Ayuso 131696518518SPatrick McHardy #endif /* _NET_NF_TABLES_H */ 1317