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> 1296518518SPatrick McHardy #include <net/netlink.h> 1396518518SPatrick McHardy 1420a69341SPatrick McHardy #define NFT_JUMP_STACK_SIZE 16 1520a69341SPatrick McHardy 1696518518SPatrick McHardy struct nft_pktinfo { 1796518518SPatrick McHardy struct sk_buff *skb; 18beac5afaSPablo Neira Ayuso bool tprot_set; 194566bf27SPatrick McHardy u8 tprot; 200ca743a5SPablo Neira Ayuso /* for x_tables compatibility */ 210ca743a5SPablo Neira Ayuso struct xt_action_param xt; 2296518518SPatrick McHardy }; 2396518518SPatrick McHardy 240e5a1c7eSPablo Neira Ayuso static inline struct net *nft_net(const struct nft_pktinfo *pkt) 250e5a1c7eSPablo Neira Ayuso { 260e5a1c7eSPablo Neira Ayuso return pkt->xt.state->net; 270e5a1c7eSPablo Neira Ayuso } 280e5a1c7eSPablo Neira Ayuso 290e5a1c7eSPablo Neira Ayuso static inline unsigned int nft_hook(const struct nft_pktinfo *pkt) 300e5a1c7eSPablo Neira Ayuso { 310e5a1c7eSPablo Neira Ayuso return pkt->xt.state->hook; 320e5a1c7eSPablo Neira Ayuso } 330e5a1c7eSPablo Neira Ayuso 340e5a1c7eSPablo Neira Ayuso static inline u8 nft_pf(const struct nft_pktinfo *pkt) 350e5a1c7eSPablo Neira Ayuso { 360e5a1c7eSPablo Neira Ayuso return pkt->xt.state->pf; 370e5a1c7eSPablo Neira Ayuso } 380e5a1c7eSPablo Neira Ayuso 390e5a1c7eSPablo Neira Ayuso static inline const struct net_device *nft_in(const struct nft_pktinfo *pkt) 400e5a1c7eSPablo Neira Ayuso { 410e5a1c7eSPablo Neira Ayuso return pkt->xt.state->in; 420e5a1c7eSPablo Neira Ayuso } 430e5a1c7eSPablo Neira Ayuso 440e5a1c7eSPablo Neira Ayuso static inline const struct net_device *nft_out(const struct nft_pktinfo *pkt) 450e5a1c7eSPablo Neira Ayuso { 460e5a1c7eSPablo Neira Ayuso return pkt->xt.state->out; 470e5a1c7eSPablo Neira Ayuso } 480e5a1c7eSPablo Neira Ayuso 490ca743a5SPablo Neira Ayuso static inline void nft_set_pktinfo(struct nft_pktinfo *pkt, 500ca743a5SPablo Neira Ayuso struct sk_buff *skb, 51073bfd56SDavid S. Miller const struct nf_hook_state *state) 520ca743a5SPablo Neira Ayuso { 530ca743a5SPablo Neira Ayuso pkt->skb = skb; 54613dbd95SPablo Neira Ayuso pkt->xt.state = state; 550ca743a5SPablo Neira Ayuso } 560ca743a5SPablo Neira Ayuso 577a4473a3SPablo Neira Ayuso static inline void nft_set_pktinfo_unspec(struct nft_pktinfo *pkt, 58beac5afaSPablo Neira Ayuso struct sk_buff *skb) 59beac5afaSPablo Neira Ayuso { 60beac5afaSPablo Neira Ayuso pkt->tprot_set = false; 61beac5afaSPablo Neira Ayuso pkt->tprot = 0; 62beac5afaSPablo Neira Ayuso pkt->xt.thoff = 0; 63beac5afaSPablo Neira Ayuso pkt->xt.fragoff = 0; 64beac5afaSPablo Neira Ayuso } 65beac5afaSPablo Neira Ayuso 66a55e22e9SPatrick McHardy /** 67a55e22e9SPatrick McHardy * struct nft_verdict - nf_tables verdict 68a55e22e9SPatrick McHardy * 69a55e22e9SPatrick McHardy * @code: nf_tables/netfilter verdict code 70a55e22e9SPatrick McHardy * @chain: destination chain for NFT_JUMP/NFT_GOTO 71a55e22e9SPatrick McHardy */ 72a55e22e9SPatrick McHardy struct nft_verdict { 73a55e22e9SPatrick McHardy u32 code; 74a55e22e9SPatrick McHardy struct nft_chain *chain; 75a55e22e9SPatrick McHardy }; 76a55e22e9SPatrick McHardy 7796518518SPatrick McHardy struct nft_data { 7896518518SPatrick McHardy union { 7996518518SPatrick McHardy u32 data[4]; 801ca2e170SPatrick McHardy struct nft_verdict verdict; 8196518518SPatrick McHardy }; 8296518518SPatrick McHardy } __attribute__((aligned(__alignof__(u64)))); 8396518518SPatrick McHardy 84a55e22e9SPatrick McHardy /** 85a55e22e9SPatrick McHardy * struct nft_regs - nf_tables register set 86a55e22e9SPatrick McHardy * 87a55e22e9SPatrick McHardy * @data: data registers 88a55e22e9SPatrick McHardy * @verdict: verdict register 89a55e22e9SPatrick McHardy * 90a55e22e9SPatrick McHardy * The first four data registers alias to the verdict register. 91a55e22e9SPatrick McHardy */ 92a55e22e9SPatrick McHardy struct nft_regs { 93a55e22e9SPatrick McHardy union { 9449499c3eSPatrick McHardy u32 data[20]; 95a55e22e9SPatrick McHardy struct nft_verdict verdict; 96a55e22e9SPatrick McHardy }; 97a55e22e9SPatrick McHardy }; 98a55e22e9SPatrick McHardy 9910596608SLiping Zhang /* Store/load an u16 or u8 integer to/from the u32 data register. 10010596608SLiping Zhang * 10110596608SLiping Zhang * Note, when using concatenations, register allocation happens at 32-bit 10210596608SLiping Zhang * level. So for store instruction, pad the rest part with zero to avoid 10310596608SLiping Zhang * garbage values. 10410596608SLiping Zhang */ 10510596608SLiping Zhang 10610596608SLiping Zhang static inline void nft_reg_store16(u32 *dreg, u16 val) 10710596608SLiping Zhang { 10810596608SLiping Zhang *dreg = 0; 10910596608SLiping Zhang *(u16 *)dreg = val; 11010596608SLiping Zhang } 11110596608SLiping Zhang 11210596608SLiping Zhang static inline void nft_reg_store8(u32 *dreg, u8 val) 11310596608SLiping Zhang { 11410596608SLiping Zhang *dreg = 0; 11510596608SLiping Zhang *(u8 *)dreg = val; 11610596608SLiping Zhang } 11710596608SLiping Zhang 11810596608SLiping Zhang static inline u16 nft_reg_load16(u32 *sreg) 11910596608SLiping Zhang { 12010596608SLiping Zhang return *(u16 *)sreg; 12110596608SLiping Zhang } 12210596608SLiping Zhang 12310596608SLiping Zhang static inline u8 nft_reg_load8(u32 *sreg) 12410596608SLiping Zhang { 12510596608SLiping Zhang return *(u8 *)sreg; 12610596608SLiping Zhang } 12710596608SLiping Zhang 12849499c3eSPatrick McHardy static inline void nft_data_copy(u32 *dst, const struct nft_data *src, 12949499c3eSPatrick McHardy unsigned int len) 13096518518SPatrick McHardy { 13149499c3eSPatrick McHardy memcpy(dst, src, len); 13296518518SPatrick McHardy } 13396518518SPatrick McHardy 13496518518SPatrick McHardy static inline void nft_data_debug(const struct nft_data *data) 13596518518SPatrick McHardy { 13696518518SPatrick McHardy pr_debug("data[0]=%x data[1]=%x data[2]=%x data[3]=%x\n", 13796518518SPatrick McHardy data->data[0], data->data[1], 13896518518SPatrick McHardy data->data[2], data->data[3]); 13996518518SPatrick McHardy } 14096518518SPatrick McHardy 14196518518SPatrick McHardy /** 14220a69341SPatrick McHardy * struct nft_ctx - nf_tables rule/set context 14396518518SPatrick McHardy * 14499633ab2SPablo Neira Ayuso * @net: net namespace 14596518518SPatrick McHardy * @afi: address family info 14696518518SPatrick McHardy * @table: the table the chain is contained in 14796518518SPatrick McHardy * @chain: the chain the rule is contained in 1480ca743a5SPablo Neira Ayuso * @nla: netlink attributes 149128ad332SPablo Neira Ayuso * @portid: netlink portID of the original message 150128ad332SPablo Neira Ayuso * @seq: netlink sequence number 151128ad332SPablo Neira Ayuso * @report: notify via unicast netlink message 15296518518SPatrick McHardy */ 15396518518SPatrick McHardy struct nft_ctx { 15499633ab2SPablo Neira Ayuso struct net *net; 1557c95f6d8SPablo Neira Ayuso struct nft_af_info *afi; 1567c95f6d8SPablo Neira Ayuso struct nft_table *table; 1577c95f6d8SPablo Neira Ayuso struct nft_chain *chain; 1580ca743a5SPablo Neira Ayuso const struct nlattr * const *nla; 159128ad332SPablo Neira Ayuso u32 portid; 160128ad332SPablo Neira Ayuso u32 seq; 161128ad332SPablo Neira Ayuso bool report; 16296518518SPatrick McHardy }; 16396518518SPatrick McHardy 16496518518SPatrick McHardy struct nft_data_desc { 16596518518SPatrick McHardy enum nft_data_types type; 16696518518SPatrick McHardy unsigned int len; 16796518518SPatrick McHardy }; 16896518518SPatrick McHardy 169d0a11fc3SPatrick McHardy int nft_data_init(const struct nft_ctx *ctx, 170d0a11fc3SPatrick McHardy struct nft_data *data, unsigned int size, 17196518518SPatrick McHardy struct nft_data_desc *desc, const struct nlattr *nla); 17259105446SPablo Neira Ayuso void nft_data_release(const struct nft_data *data, enum nft_data_types type); 1735eccdfaaSJoe Perches int nft_data_dump(struct sk_buff *skb, int attr, const struct nft_data *data, 17496518518SPatrick McHardy enum nft_data_types type, unsigned int len); 17596518518SPatrick McHardy 17696518518SPatrick McHardy static inline enum nft_data_types nft_dreg_to_type(enum nft_registers reg) 17796518518SPatrick McHardy { 17896518518SPatrick McHardy return reg == NFT_REG_VERDICT ? NFT_DATA_VERDICT : NFT_DATA_VALUE; 17996518518SPatrick McHardy } 18096518518SPatrick McHardy 18120a69341SPatrick McHardy static inline enum nft_registers nft_type_to_reg(enum nft_data_types type) 18220a69341SPatrick McHardy { 183bf798657SPablo Neira Ayuso return type == NFT_DATA_VERDICT ? NFT_REG_VERDICT : NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE; 18420a69341SPatrick McHardy } 18520a69341SPatrick McHardy 186f1d505bbSJohn W. Linville int nft_parse_u32_check(const struct nlattr *attr, int max, u32 *dest); 187b1c96ed3SPatrick McHardy unsigned int nft_parse_register(const struct nlattr *attr); 188b1c96ed3SPatrick McHardy int nft_dump_register(struct sk_buff *skb, unsigned int attr, unsigned int reg); 189b1c96ed3SPatrick McHardy 190d07db988SPatrick McHardy int nft_validate_register_load(enum nft_registers reg, unsigned int len); 1911ec10212SPatrick McHardy int nft_validate_register_store(const struct nft_ctx *ctx, 1921ec10212SPatrick McHardy enum nft_registers reg, 19396518518SPatrick McHardy const struct nft_data *data, 19445d9bcdaSPatrick McHardy enum nft_data_types type, unsigned int len); 19596518518SPatrick McHardy 19686f1ec32SPatrick McHardy /** 19786f1ec32SPatrick McHardy * struct nft_userdata - user defined data associated with an object 19886f1ec32SPatrick McHardy * 19986f1ec32SPatrick McHardy * @len: length of the data 20086f1ec32SPatrick McHardy * @data: content 20186f1ec32SPatrick McHardy * 20286f1ec32SPatrick McHardy * The presence of user data is indicated in an object specific fashion, 20386f1ec32SPatrick McHardy * so a length of zero can't occur and the value "len" indicates data 20486f1ec32SPatrick McHardy * of length len + 1. 20586f1ec32SPatrick McHardy */ 20686f1ec32SPatrick McHardy struct nft_userdata { 20786f1ec32SPatrick McHardy u8 len; 20886f1ec32SPatrick McHardy unsigned char data[0]; 20986f1ec32SPatrick McHardy }; 21086f1ec32SPatrick McHardy 21196518518SPatrick McHardy /** 21220a69341SPatrick McHardy * struct nft_set_elem - generic representation of set elements 21320a69341SPatrick McHardy * 21420a69341SPatrick McHardy * @key: element key 215fe2811ebSPatrick McHardy * @priv: element private data and extensions 21620a69341SPatrick McHardy */ 21720a69341SPatrick McHardy struct nft_set_elem { 2187d740264SPatrick McHardy union { 2197d740264SPatrick McHardy u32 buf[NFT_DATA_VALUE_MAXLEN / sizeof(u32)]; 2207d740264SPatrick McHardy struct nft_data val; 2217d740264SPatrick McHardy } key; 222fe2811ebSPatrick McHardy void *priv; 22320a69341SPatrick McHardy }; 22420a69341SPatrick McHardy 22520a69341SPatrick McHardy struct nft_set; 22620a69341SPatrick McHardy struct nft_set_iter { 2278588ac09SPablo Neira Ayuso u8 genmask; 22820a69341SPatrick McHardy unsigned int count; 22920a69341SPatrick McHardy unsigned int skip; 23020a69341SPatrick McHardy int err; 23120a69341SPatrick McHardy int (*fn)(const struct nft_ctx *ctx, 232de70185dSPablo Neira Ayuso struct nft_set *set, 23320a69341SPatrick McHardy const struct nft_set_iter *iter, 234de70185dSPablo Neira Ayuso struct nft_set_elem *elem); 23520a69341SPatrick McHardy }; 23620a69341SPatrick McHardy 23720a69341SPatrick McHardy /** 238c50b960cSPatrick McHardy * struct nft_set_desc - description of set elements 239c50b960cSPatrick McHardy * 240c50b960cSPatrick McHardy * @klen: key length 241c50b960cSPatrick McHardy * @dlen: data length 242c50b960cSPatrick McHardy * @size: number of set elements 243c50b960cSPatrick McHardy */ 244c50b960cSPatrick McHardy struct nft_set_desc { 245c50b960cSPatrick McHardy unsigned int klen; 246c50b960cSPatrick McHardy unsigned int dlen; 247c50b960cSPatrick McHardy unsigned int size; 248c50b960cSPatrick McHardy }; 249c50b960cSPatrick McHardy 250c50b960cSPatrick McHardy /** 251c50b960cSPatrick McHardy * enum nft_set_class - performance class 252c50b960cSPatrick McHardy * 253c50b960cSPatrick McHardy * @NFT_LOOKUP_O_1: constant, O(1) 254c50b960cSPatrick McHardy * @NFT_LOOKUP_O_LOG_N: logarithmic, O(log N) 255c50b960cSPatrick McHardy * @NFT_LOOKUP_O_N: linear, O(N) 256c50b960cSPatrick McHardy */ 257c50b960cSPatrick McHardy enum nft_set_class { 258c50b960cSPatrick McHardy NFT_SET_CLASS_O_1, 259c50b960cSPatrick McHardy NFT_SET_CLASS_O_LOG_N, 260c50b960cSPatrick McHardy NFT_SET_CLASS_O_N, 261c50b960cSPatrick McHardy }; 262c50b960cSPatrick McHardy 263c50b960cSPatrick McHardy /** 264c50b960cSPatrick McHardy * struct nft_set_estimate - estimation of memory and performance 265c50b960cSPatrick McHardy * characteristics 266c50b960cSPatrick McHardy * 267c50b960cSPatrick McHardy * @size: required memory 26855af753cSPablo Neira Ayuso * @lookup: lookup performance class 2690b5a7874SPablo Neira Ayuso * @space: memory class 270c50b960cSPatrick McHardy */ 271c50b960cSPatrick McHardy struct nft_set_estimate { 272c50b960cSPatrick McHardy unsigned int size; 27355af753cSPablo Neira Ayuso enum nft_set_class lookup; 2740b5a7874SPablo Neira Ayuso enum nft_set_class space; 275c50b960cSPatrick McHardy }; 276c50b960cSPatrick McHardy 2772b664957SPablo Neira Ayuso /** 2782b664957SPablo Neira Ayuso * struct nft_set_type - nf_tables set type 2792b664957SPablo Neira Ayuso * 2802b664957SPablo Neira Ayuso * @select_ops: function to select nft_set_ops 2812b664957SPablo Neira Ayuso * @ops: default ops, used when no select_ops functions is present 2822b664957SPablo Neira Ayuso * @list: used internally 2832b664957SPablo Neira Ayuso * @owner: module reference 2842b664957SPablo Neira Ayuso */ 2852b664957SPablo Neira Ayuso struct nft_set_type { 2862b664957SPablo Neira Ayuso const struct nft_set_ops *(*select_ops)(const struct nft_ctx *, 2872b664957SPablo Neira Ayuso const struct nft_set_desc *desc, 2882b664957SPablo Neira Ayuso u32 flags); 2892b664957SPablo Neira Ayuso const struct nft_set_ops *ops; 2902b664957SPablo Neira Ayuso struct list_head list; 2912b664957SPablo Neira Ayuso struct module *owner; 2922b664957SPablo Neira Ayuso }; 2932b664957SPablo Neira Ayuso 294b2832dd6SPatrick McHardy struct nft_set_ext; 29522fe54d5SPatrick McHardy struct nft_expr; 296b2832dd6SPatrick McHardy 297c50b960cSPatrick McHardy /** 29820a69341SPatrick McHardy * struct nft_set_ops - nf_tables set operations 29920a69341SPatrick McHardy * 30020a69341SPatrick McHardy * @lookup: look up an element within the set 30120a69341SPatrick McHardy * @insert: insert new element into set 302cc02e457SPatrick McHardy * @activate: activate new element in the next generation 3038411b644SPablo Neira Ayuso * @deactivate: lookup for element and deactivate it in the next generation 3041ba1c414SPablo Neira Ayuso * @flush: deactivate element in the next generation 30520a69341SPatrick McHardy * @remove: remove element from set 30620a69341SPatrick McHardy * @walk: iterate over all set elemeennts 307ba0e4d99SPablo Neira Ayuso * @get: get set elements 30820a69341SPatrick McHardy * @privsize: function to return size of set private data 30920a69341SPatrick McHardy * @init: initialize private data of new set instance 31020a69341SPatrick McHardy * @destroy: destroy private data of set instance 311fe2811ebSPatrick McHardy * @elemsize: element private size 31220a69341SPatrick McHardy * @features: features supported by the implementation 31320a69341SPatrick McHardy */ 31420a69341SPatrick McHardy struct nft_set_ops { 31542a55769SPablo Neira Ayuso bool (*lookup)(const struct net *net, 31642a55769SPablo Neira Ayuso const struct nft_set *set, 3178cd8937aSPatrick McHardy const u32 *key, 318b2832dd6SPatrick McHardy const struct nft_set_ext **ext); 31922fe54d5SPatrick McHardy bool (*update)(struct nft_set *set, 3208cd8937aSPatrick McHardy const u32 *key, 32122fe54d5SPatrick McHardy void *(*new)(struct nft_set *, 32222fe54d5SPatrick McHardy const struct nft_expr *, 323a55e22e9SPatrick McHardy struct nft_regs *), 32422fe54d5SPatrick McHardy const struct nft_expr *expr, 325a55e22e9SPatrick McHardy struct nft_regs *regs, 32622fe54d5SPatrick McHardy const struct nft_set_ext **ext); 32722fe54d5SPatrick McHardy 32842a55769SPablo Neira Ayuso int (*insert)(const struct net *net, 32942a55769SPablo Neira Ayuso const struct nft_set *set, 330c016c7e4SPablo Neira Ayuso const struct nft_set_elem *elem, 331c016c7e4SPablo Neira Ayuso struct nft_set_ext **ext); 33242a55769SPablo Neira Ayuso void (*activate)(const struct net *net, 33342a55769SPablo Neira Ayuso const struct nft_set *set, 334cc02e457SPatrick McHardy const struct nft_set_elem *elem); 33542a55769SPablo Neira Ayuso void * (*deactivate)(const struct net *net, 33642a55769SPablo Neira Ayuso const struct nft_set *set, 337cc02e457SPatrick McHardy const struct nft_set_elem *elem); 3381ba1c414SPablo Neira Ayuso bool (*flush)(const struct net *net, 3398411b644SPablo Neira Ayuso const struct nft_set *set, 3408411b644SPablo Neira Ayuso void *priv); 3415cb82a38SPablo Neira Ayuso void (*remove)(const struct net *net, 3425cb82a38SPablo Neira Ayuso const struct nft_set *set, 34320a69341SPatrick McHardy const struct nft_set_elem *elem); 34420a69341SPatrick McHardy void (*walk)(const struct nft_ctx *ctx, 345de70185dSPablo Neira Ayuso struct nft_set *set, 34620a69341SPatrick McHardy struct nft_set_iter *iter); 347ba0e4d99SPablo Neira Ayuso void * (*get)(const struct net *net, 348ba0e4d99SPablo Neira Ayuso const struct nft_set *set, 349ba0e4d99SPablo Neira Ayuso const struct nft_set_elem *elem, 350ba0e4d99SPablo Neira Ayuso unsigned int flags); 35120a69341SPatrick McHardy 352347b408dSPablo Neira Ayuso unsigned int (*privsize)(const struct nlattr * const nla[], 353347b408dSPablo Neira Ayuso const struct nft_set_desc *desc); 354c50b960cSPatrick McHardy bool (*estimate)(const struct nft_set_desc *desc, 355c50b960cSPatrick McHardy u32 features, 356c50b960cSPatrick McHardy struct nft_set_estimate *est); 35720a69341SPatrick McHardy int (*init)(const struct nft_set *set, 358c50b960cSPatrick McHardy const struct nft_set_desc *desc, 35920a69341SPatrick McHardy const struct nlattr * const nla[]); 36020a69341SPatrick McHardy void (*destroy)(const struct nft_set *set); 36120a69341SPatrick McHardy 362fe2811ebSPatrick McHardy unsigned int elemsize; 36320a69341SPatrick McHardy u32 features; 3642b664957SPablo Neira Ayuso const struct nft_set_type *type; 36520a69341SPatrick McHardy }; 36620a69341SPatrick McHardy 3672b664957SPablo Neira Ayuso int nft_register_set(struct nft_set_type *type); 3682b664957SPablo Neira Ayuso void nft_unregister_set(struct nft_set_type *type); 36920a69341SPatrick McHardy 37020a69341SPatrick McHardy /** 37120a69341SPatrick McHardy * struct nft_set - nf_tables set instance 37220a69341SPatrick McHardy * 37320a69341SPatrick McHardy * @list: table set list node 37420a69341SPatrick McHardy * @bindings: list of set bindings 37520a69341SPatrick McHardy * @name: name of the set 37620a69341SPatrick McHardy * @ktype: key type (numeric type defined by userspace, not used in the kernel) 37720a69341SPatrick McHardy * @dtype: data type (verdict or numeric type defined by userspace) 3788aeff920SPablo Neira Ayuso * @objtype: object type (see NFT_OBJECT_* definitions) 379c50b960cSPatrick McHardy * @size: maximum set size 380c50b960cSPatrick McHardy * @nelems: number of elements 3813dd0673aSPatrick McHardy * @ndeact: number of deactivated elements queued for removal 382d3e2a111SAnders K. Pedersen * @timeout: default timeout value in jiffies 383761da293SPatrick McHardy * @gc_int: garbage collection interval in msecs 3849363dc4bSArturo Borrero * @policy: set parameterization (see enum nft_set_policies) 385e6d8ecacSCarlos Falgueras García * @udlen: user data length 386e6d8ecacSCarlos Falgueras García * @udata: user data 38720a69341SPatrick McHardy * @ops: set ops 38820a69341SPatrick McHardy * @flags: set flags 38937a9cc52SPablo Neira Ayuso * @genmask: generation mask 39020a69341SPatrick McHardy * @klen: key length 39120a69341SPatrick McHardy * @dlen: data length 39220a69341SPatrick McHardy * @data: private set data 39320a69341SPatrick McHardy */ 39420a69341SPatrick McHardy struct nft_set { 39520a69341SPatrick McHardy struct list_head list; 39620a69341SPatrick McHardy struct list_head bindings; 39738745490SPhil Sutter char *name; 39820a69341SPatrick McHardy u32 ktype; 39920a69341SPatrick McHardy u32 dtype; 4008aeff920SPablo Neira Ayuso u32 objtype; 401c50b960cSPatrick McHardy u32 size; 4023dd0673aSPatrick McHardy atomic_t nelems; 4033dd0673aSPatrick McHardy u32 ndeact; 404761da293SPatrick McHardy u64 timeout; 405761da293SPatrick McHardy u32 gc_int; 4069363dc4bSArturo Borrero u16 policy; 407e6d8ecacSCarlos Falgueras García u16 udlen; 408e6d8ecacSCarlos Falgueras García unsigned char *udata; 40920a69341SPatrick McHardy /* runtime data below here */ 41020a69341SPatrick McHardy const struct nft_set_ops *ops ____cacheline_aligned; 41137a9cc52SPablo Neira Ayuso u16 flags:14, 41237a9cc52SPablo Neira Ayuso genmask:2; 41320a69341SPatrick McHardy u8 klen; 41420a69341SPatrick McHardy u8 dlen; 41520a69341SPatrick McHardy unsigned char data[] 41620a69341SPatrick McHardy __attribute__((aligned(__alignof__(u64)))); 41720a69341SPatrick McHardy }; 41820a69341SPatrick McHardy 419408070d6SPablo Neira Ayuso static inline bool nft_set_is_anonymous(const struct nft_set *set) 420408070d6SPablo Neira Ayuso { 421408070d6SPablo Neira Ayuso return set->flags & NFT_SET_ANONYMOUS; 422408070d6SPablo Neira Ayuso } 423408070d6SPablo Neira Ayuso 42420a69341SPatrick McHardy static inline void *nft_set_priv(const struct nft_set *set) 42520a69341SPatrick McHardy { 42620a69341SPatrick McHardy return (void *)set->data; 42720a69341SPatrick McHardy } 42820a69341SPatrick McHardy 4299d098292SPatrick McHardy static inline struct nft_set *nft_set_container_of(const void *priv) 4309d098292SPatrick McHardy { 4319d098292SPatrick McHardy return (void *)priv - offsetof(struct nft_set, data); 4329d098292SPatrick McHardy } 4339d098292SPatrick McHardy 434c7a72e3fSPablo Neira Ayuso struct nft_set *nft_set_lookup(const struct net *net, 435c7a72e3fSPablo Neira Ayuso const struct nft_table *table, 436c7a72e3fSPablo Neira Ayuso const struct nlattr *nla_set_name, 437c7a72e3fSPablo Neira Ayuso const struct nlattr *nla_set_id, 438c7a72e3fSPablo Neira Ayuso u8 genmask); 43920a69341SPatrick McHardy 440761da293SPatrick McHardy static inline unsigned long nft_set_gc_interval(const struct nft_set *set) 441761da293SPatrick McHardy { 442761da293SPatrick McHardy return set->gc_int ? msecs_to_jiffies(set->gc_int) : HZ; 443761da293SPatrick McHardy } 444761da293SPatrick McHardy 44520a69341SPatrick McHardy /** 44620a69341SPatrick McHardy * struct nft_set_binding - nf_tables set binding 44720a69341SPatrick McHardy * 44820a69341SPatrick McHardy * @list: set bindings list node 44920a69341SPatrick McHardy * @chain: chain containing the rule bound to the set 45011113e19SPatrick McHardy * @flags: set action flags 45120a69341SPatrick McHardy * 45220a69341SPatrick McHardy * A set binding contains all information necessary for validation 45320a69341SPatrick McHardy * of new elements added to a bound set. 45420a69341SPatrick McHardy */ 45520a69341SPatrick McHardy struct nft_set_binding { 45620a69341SPatrick McHardy struct list_head list; 45720a69341SPatrick McHardy const struct nft_chain *chain; 45811113e19SPatrick McHardy u32 flags; 45920a69341SPatrick McHardy }; 46020a69341SPatrick McHardy 4615eccdfaaSJoe Perches int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set, 46220a69341SPatrick McHardy struct nft_set_binding *binding); 4635eccdfaaSJoe Perches void nf_tables_unbind_set(const struct nft_ctx *ctx, struct nft_set *set, 46420a69341SPatrick McHardy struct nft_set_binding *binding); 46520a69341SPatrick McHardy 4663ac4c07aSPatrick McHardy /** 4673ac4c07aSPatrick McHardy * enum nft_set_extensions - set extension type IDs 4683ac4c07aSPatrick McHardy * 4693ac4c07aSPatrick McHardy * @NFT_SET_EXT_KEY: element key 4703ac4c07aSPatrick McHardy * @NFT_SET_EXT_DATA: mapping data 4713ac4c07aSPatrick McHardy * @NFT_SET_EXT_FLAGS: element flags 472c3e1b005SPatrick McHardy * @NFT_SET_EXT_TIMEOUT: element timeout 473c3e1b005SPatrick McHardy * @NFT_SET_EXT_EXPIRATION: element expiration time 47468e942e8SPatrick McHardy * @NFT_SET_EXT_USERDATA: user data associated with the element 475f25ad2e9SPatrick McHardy * @NFT_SET_EXT_EXPR: expression assiociated with the element 4768aeff920SPablo Neira Ayuso * @NFT_SET_EXT_OBJREF: stateful object reference associated with element 4773ac4c07aSPatrick McHardy * @NFT_SET_EXT_NUM: number of extension types 4783ac4c07aSPatrick McHardy */ 4793ac4c07aSPatrick McHardy enum nft_set_extensions { 4803ac4c07aSPatrick McHardy NFT_SET_EXT_KEY, 4813ac4c07aSPatrick McHardy NFT_SET_EXT_DATA, 4823ac4c07aSPatrick McHardy NFT_SET_EXT_FLAGS, 483c3e1b005SPatrick McHardy NFT_SET_EXT_TIMEOUT, 484c3e1b005SPatrick McHardy NFT_SET_EXT_EXPIRATION, 48568e942e8SPatrick McHardy NFT_SET_EXT_USERDATA, 486f25ad2e9SPatrick McHardy NFT_SET_EXT_EXPR, 4878aeff920SPablo Neira Ayuso NFT_SET_EXT_OBJREF, 4883ac4c07aSPatrick McHardy NFT_SET_EXT_NUM 4893ac4c07aSPatrick McHardy }; 4903ac4c07aSPatrick McHardy 4913ac4c07aSPatrick McHardy /** 4923ac4c07aSPatrick McHardy * struct nft_set_ext_type - set extension type 4933ac4c07aSPatrick McHardy * 4943ac4c07aSPatrick McHardy * @len: fixed part length of the extension 4953ac4c07aSPatrick McHardy * @align: alignment requirements of the extension 4963ac4c07aSPatrick McHardy */ 4973ac4c07aSPatrick McHardy struct nft_set_ext_type { 4983ac4c07aSPatrick McHardy u8 len; 4993ac4c07aSPatrick McHardy u8 align; 5003ac4c07aSPatrick McHardy }; 5013ac4c07aSPatrick McHardy 5023ac4c07aSPatrick McHardy extern const struct nft_set_ext_type nft_set_ext_types[]; 5033ac4c07aSPatrick McHardy 5043ac4c07aSPatrick McHardy /** 5053ac4c07aSPatrick McHardy * struct nft_set_ext_tmpl - set extension template 5063ac4c07aSPatrick McHardy * 5073ac4c07aSPatrick McHardy * @len: length of extension area 5083ac4c07aSPatrick McHardy * @offset: offsets of individual extension types 5093ac4c07aSPatrick McHardy */ 5103ac4c07aSPatrick McHardy struct nft_set_ext_tmpl { 5113ac4c07aSPatrick McHardy u16 len; 5123ac4c07aSPatrick McHardy u8 offset[NFT_SET_EXT_NUM]; 5133ac4c07aSPatrick McHardy }; 5143ac4c07aSPatrick McHardy 5153ac4c07aSPatrick McHardy /** 5163ac4c07aSPatrick McHardy * struct nft_set_ext - set extensions 5173ac4c07aSPatrick McHardy * 518cc02e457SPatrick McHardy * @genmask: generation mask 5193ac4c07aSPatrick McHardy * @offset: offsets of individual extension types 5203ac4c07aSPatrick McHardy * @data: beginning of extension data 5213ac4c07aSPatrick McHardy */ 5223ac4c07aSPatrick McHardy struct nft_set_ext { 523cc02e457SPatrick McHardy u8 genmask; 5243ac4c07aSPatrick McHardy u8 offset[NFT_SET_EXT_NUM]; 5253ac4c07aSPatrick McHardy char data[0]; 5263ac4c07aSPatrick McHardy }; 5273ac4c07aSPatrick McHardy 5283ac4c07aSPatrick McHardy static inline void nft_set_ext_prepare(struct nft_set_ext_tmpl *tmpl) 5293ac4c07aSPatrick McHardy { 5303ac4c07aSPatrick McHardy memset(tmpl, 0, sizeof(*tmpl)); 5313ac4c07aSPatrick McHardy tmpl->len = sizeof(struct nft_set_ext); 5323ac4c07aSPatrick McHardy } 5333ac4c07aSPatrick McHardy 5343ac4c07aSPatrick McHardy static inline void nft_set_ext_add_length(struct nft_set_ext_tmpl *tmpl, u8 id, 5353ac4c07aSPatrick McHardy unsigned int len) 5363ac4c07aSPatrick McHardy { 5373ac4c07aSPatrick McHardy tmpl->len = ALIGN(tmpl->len, nft_set_ext_types[id].align); 5383ac4c07aSPatrick McHardy BUG_ON(tmpl->len > U8_MAX); 5393ac4c07aSPatrick McHardy tmpl->offset[id] = tmpl->len; 5403ac4c07aSPatrick McHardy tmpl->len += nft_set_ext_types[id].len + len; 5413ac4c07aSPatrick McHardy } 5423ac4c07aSPatrick McHardy 5433ac4c07aSPatrick McHardy static inline void nft_set_ext_add(struct nft_set_ext_tmpl *tmpl, u8 id) 5443ac4c07aSPatrick McHardy { 5453ac4c07aSPatrick McHardy nft_set_ext_add_length(tmpl, id, 0); 5463ac4c07aSPatrick McHardy } 5473ac4c07aSPatrick McHardy 5483ac4c07aSPatrick McHardy static inline void nft_set_ext_init(struct nft_set_ext *ext, 5493ac4c07aSPatrick McHardy const struct nft_set_ext_tmpl *tmpl) 5503ac4c07aSPatrick McHardy { 5513ac4c07aSPatrick McHardy memcpy(ext->offset, tmpl->offset, sizeof(ext->offset)); 5523ac4c07aSPatrick McHardy } 5533ac4c07aSPatrick McHardy 5543ac4c07aSPatrick McHardy static inline bool __nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) 5553ac4c07aSPatrick McHardy { 5563ac4c07aSPatrick McHardy return !!ext->offset[id]; 5573ac4c07aSPatrick McHardy } 5583ac4c07aSPatrick McHardy 5593ac4c07aSPatrick McHardy static inline bool nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) 5603ac4c07aSPatrick McHardy { 5613ac4c07aSPatrick McHardy return ext && __nft_set_ext_exists(ext, id); 5623ac4c07aSPatrick McHardy } 5633ac4c07aSPatrick McHardy 5643ac4c07aSPatrick McHardy static inline void *nft_set_ext(const struct nft_set_ext *ext, u8 id) 5653ac4c07aSPatrick McHardy { 5663ac4c07aSPatrick McHardy return (void *)ext + ext->offset[id]; 5673ac4c07aSPatrick McHardy } 5683ac4c07aSPatrick McHardy 5693ac4c07aSPatrick McHardy static inline struct nft_data *nft_set_ext_key(const struct nft_set_ext *ext) 5703ac4c07aSPatrick McHardy { 5713ac4c07aSPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_KEY); 5723ac4c07aSPatrick McHardy } 5733ac4c07aSPatrick McHardy 5743ac4c07aSPatrick McHardy static inline struct nft_data *nft_set_ext_data(const struct nft_set_ext *ext) 5753ac4c07aSPatrick McHardy { 5763ac4c07aSPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_DATA); 5773ac4c07aSPatrick McHardy } 5783ac4c07aSPatrick McHardy 5793ac4c07aSPatrick McHardy static inline u8 *nft_set_ext_flags(const struct nft_set_ext *ext) 5803ac4c07aSPatrick McHardy { 5813ac4c07aSPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_FLAGS); 5823ac4c07aSPatrick McHardy } 583ef1f7df9SPatrick McHardy 584c3e1b005SPatrick McHardy static inline u64 *nft_set_ext_timeout(const struct nft_set_ext *ext) 585c3e1b005SPatrick McHardy { 586c3e1b005SPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_TIMEOUT); 587c3e1b005SPatrick McHardy } 588c3e1b005SPatrick McHardy 589c3e1b005SPatrick McHardy static inline unsigned long *nft_set_ext_expiration(const struct nft_set_ext *ext) 590c3e1b005SPatrick McHardy { 591c3e1b005SPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_EXPIRATION); 592c3e1b005SPatrick McHardy } 593c3e1b005SPatrick McHardy 59468e942e8SPatrick McHardy static inline struct nft_userdata *nft_set_ext_userdata(const struct nft_set_ext *ext) 59568e942e8SPatrick McHardy { 59668e942e8SPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_USERDATA); 59768e942e8SPatrick McHardy } 59868e942e8SPatrick McHardy 599f25ad2e9SPatrick McHardy static inline struct nft_expr *nft_set_ext_expr(const struct nft_set_ext *ext) 600f25ad2e9SPatrick McHardy { 601f25ad2e9SPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_EXPR); 602f25ad2e9SPatrick McHardy } 603f25ad2e9SPatrick McHardy 604c3e1b005SPatrick McHardy static inline bool nft_set_elem_expired(const struct nft_set_ext *ext) 605c3e1b005SPatrick McHardy { 606c3e1b005SPatrick McHardy return nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION) && 607c3e1b005SPatrick McHardy time_is_before_eq_jiffies(*nft_set_ext_expiration(ext)); 608c3e1b005SPatrick McHardy } 609c3e1b005SPatrick McHardy 610fe2811ebSPatrick McHardy static inline struct nft_set_ext *nft_set_elem_ext(const struct nft_set *set, 611fe2811ebSPatrick McHardy void *elem) 612fe2811ebSPatrick McHardy { 613fe2811ebSPatrick McHardy return elem + set->ops->elemsize; 614fe2811ebSPatrick McHardy } 615fe2811ebSPatrick McHardy 6168aeff920SPablo Neira Ayuso static inline struct nft_object **nft_set_ext_obj(const struct nft_set_ext *ext) 6178aeff920SPablo Neira Ayuso { 6188aeff920SPablo Neira Ayuso return nft_set_ext(ext, NFT_SET_EXT_OBJREF); 6198aeff920SPablo Neira Ayuso } 6208aeff920SPablo Neira Ayuso 62122fe54d5SPatrick McHardy void *nft_set_elem_init(const struct nft_set *set, 62222fe54d5SPatrick McHardy const struct nft_set_ext_tmpl *tmpl, 62349499c3eSPatrick McHardy const u32 *key, const u32 *data, 62422fe54d5SPatrick McHardy u64 timeout, gfp_t gfp); 62561f9e292SLiping Zhang void nft_set_elem_destroy(const struct nft_set *set, void *elem, 62661f9e292SLiping Zhang bool destroy_expr); 62761edafbbSPatrick McHardy 62820a69341SPatrick McHardy /** 629cfed7e1bSPatrick McHardy * struct nft_set_gc_batch_head - nf_tables set garbage collection batch 630cfed7e1bSPatrick McHardy * 631cfed7e1bSPatrick McHardy * @rcu: rcu head 632cfed7e1bSPatrick McHardy * @set: set the elements belong to 633cfed7e1bSPatrick McHardy * @cnt: count of elements 634cfed7e1bSPatrick McHardy */ 635cfed7e1bSPatrick McHardy struct nft_set_gc_batch_head { 636cfed7e1bSPatrick McHardy struct rcu_head rcu; 637cfed7e1bSPatrick McHardy const struct nft_set *set; 638cfed7e1bSPatrick McHardy unsigned int cnt; 639cfed7e1bSPatrick McHardy }; 640cfed7e1bSPatrick McHardy 641cfed7e1bSPatrick McHardy #define NFT_SET_GC_BATCH_SIZE ((PAGE_SIZE - \ 642cfed7e1bSPatrick McHardy sizeof(struct nft_set_gc_batch_head)) / \ 643cfed7e1bSPatrick McHardy sizeof(void *)) 644cfed7e1bSPatrick McHardy 645cfed7e1bSPatrick McHardy /** 646cfed7e1bSPatrick McHardy * struct nft_set_gc_batch - nf_tables set garbage collection batch 647cfed7e1bSPatrick McHardy * 648cfed7e1bSPatrick McHardy * @head: GC batch head 649cfed7e1bSPatrick McHardy * @elems: garbage collection elements 650cfed7e1bSPatrick McHardy */ 651cfed7e1bSPatrick McHardy struct nft_set_gc_batch { 652cfed7e1bSPatrick McHardy struct nft_set_gc_batch_head head; 653cfed7e1bSPatrick McHardy void *elems[NFT_SET_GC_BATCH_SIZE]; 654cfed7e1bSPatrick McHardy }; 655cfed7e1bSPatrick McHardy 656cfed7e1bSPatrick McHardy struct nft_set_gc_batch *nft_set_gc_batch_alloc(const struct nft_set *set, 657cfed7e1bSPatrick McHardy gfp_t gfp); 658cfed7e1bSPatrick McHardy void nft_set_gc_batch_release(struct rcu_head *rcu); 659cfed7e1bSPatrick McHardy 660cfed7e1bSPatrick McHardy static inline void nft_set_gc_batch_complete(struct nft_set_gc_batch *gcb) 661cfed7e1bSPatrick McHardy { 662cfed7e1bSPatrick McHardy if (gcb != NULL) 663cfed7e1bSPatrick McHardy call_rcu(&gcb->head.rcu, nft_set_gc_batch_release); 664cfed7e1bSPatrick McHardy } 665cfed7e1bSPatrick McHardy 666cfed7e1bSPatrick McHardy static inline struct nft_set_gc_batch * 667cfed7e1bSPatrick McHardy nft_set_gc_batch_check(const struct nft_set *set, struct nft_set_gc_batch *gcb, 668cfed7e1bSPatrick McHardy gfp_t gfp) 669cfed7e1bSPatrick McHardy { 670cfed7e1bSPatrick McHardy if (gcb != NULL) { 671cfed7e1bSPatrick McHardy if (gcb->head.cnt + 1 < ARRAY_SIZE(gcb->elems)) 672cfed7e1bSPatrick McHardy return gcb; 673cfed7e1bSPatrick McHardy nft_set_gc_batch_complete(gcb); 674cfed7e1bSPatrick McHardy } 675cfed7e1bSPatrick McHardy return nft_set_gc_batch_alloc(set, gfp); 676cfed7e1bSPatrick McHardy } 677cfed7e1bSPatrick McHardy 678cfed7e1bSPatrick McHardy static inline void nft_set_gc_batch_add(struct nft_set_gc_batch *gcb, 679cfed7e1bSPatrick McHardy void *elem) 680cfed7e1bSPatrick McHardy { 681cfed7e1bSPatrick McHardy gcb->elems[gcb->head.cnt++] = elem; 682cfed7e1bSPatrick McHardy } 683cfed7e1bSPatrick McHardy 684cfed7e1bSPatrick McHardy /** 685ef1f7df9SPatrick McHardy * struct nft_expr_type - nf_tables expression type 68696518518SPatrick McHardy * 687ef1f7df9SPatrick McHardy * @select_ops: function to select nft_expr_ops 688ef1f7df9SPatrick McHardy * @ops: default ops, used when no select_ops functions is present 68996518518SPatrick McHardy * @list: used internally 69096518518SPatrick McHardy * @name: Identifier 69196518518SPatrick McHardy * @owner: module reference 69296518518SPatrick McHardy * @policy: netlink attribute policy 69396518518SPatrick McHardy * @maxattr: highest netlink attribute number 69464d46806SPatrick McHardy * @family: address family for AF-specific types 695151d799aSPatrick McHardy * @flags: expression type flags 696ef1f7df9SPatrick McHardy */ 697ef1f7df9SPatrick McHardy struct nft_expr_type { 6980ca743a5SPablo Neira Ayuso const struct nft_expr_ops *(*select_ops)(const struct nft_ctx *, 6990ca743a5SPablo Neira Ayuso const struct nlattr * const tb[]); 700ef1f7df9SPatrick McHardy const struct nft_expr_ops *ops; 701ef1f7df9SPatrick McHardy struct list_head list; 702ef1f7df9SPatrick McHardy const char *name; 703ef1f7df9SPatrick McHardy struct module *owner; 704ef1f7df9SPatrick McHardy const struct nla_policy *policy; 705ef1f7df9SPatrick McHardy unsigned int maxattr; 70664d46806SPatrick McHardy u8 family; 707151d799aSPatrick McHardy u8 flags; 708ef1f7df9SPatrick McHardy }; 709ef1f7df9SPatrick McHardy 710151d799aSPatrick McHardy #define NFT_EXPR_STATEFUL 0x1 711151d799aSPatrick McHardy 712ef1f7df9SPatrick McHardy /** 713ef1f7df9SPatrick McHardy * struct nft_expr_ops - nf_tables expression operations 714ef1f7df9SPatrick McHardy * 715ef1f7df9SPatrick McHardy * @eval: Expression evaluation function 71696518518SPatrick McHardy * @size: full expression size, including private data size 717ef1f7df9SPatrick McHardy * @init: initialization function 718ef1f7df9SPatrick McHardy * @destroy: destruction function 719ef1f7df9SPatrick McHardy * @dump: function to dump parameters 720ef1f7df9SPatrick McHardy * @type: expression type 7210ca743a5SPablo Neira Ayuso * @validate: validate expression, called during loop detection 7220ca743a5SPablo Neira Ayuso * @data: extra data to attach to this expression operation 72396518518SPatrick McHardy */ 72496518518SPatrick McHardy struct nft_expr; 72596518518SPatrick McHardy struct nft_expr_ops { 72696518518SPatrick McHardy void (*eval)(const struct nft_expr *expr, 727a55e22e9SPatrick McHardy struct nft_regs *regs, 72896518518SPatrick McHardy const struct nft_pktinfo *pkt); 729086f3321SPablo Neira Ayuso int (*clone)(struct nft_expr *dst, 730086f3321SPablo Neira Ayuso const struct nft_expr *src); 731ef1f7df9SPatrick McHardy unsigned int size; 732ef1f7df9SPatrick McHardy 73396518518SPatrick McHardy int (*init)(const struct nft_ctx *ctx, 73496518518SPatrick McHardy const struct nft_expr *expr, 73596518518SPatrick McHardy const struct nlattr * const tb[]); 73662472bceSPatrick McHardy void (*destroy)(const struct nft_ctx *ctx, 73762472bceSPatrick McHardy const struct nft_expr *expr); 73896518518SPatrick McHardy int (*dump)(struct sk_buff *skb, 73996518518SPatrick McHardy const struct nft_expr *expr); 7400ca743a5SPablo Neira Ayuso int (*validate)(const struct nft_ctx *ctx, 7410ca743a5SPablo Neira Ayuso const struct nft_expr *expr, 7420ca743a5SPablo Neira Ayuso const struct nft_data **data); 743ef1f7df9SPatrick McHardy const struct nft_expr_type *type; 7440ca743a5SPablo Neira Ayuso void *data; 74596518518SPatrick McHardy }; 74696518518SPatrick McHardy 747ef1f7df9SPatrick McHardy #define NFT_EXPR_MAXATTR 16 74896518518SPatrick McHardy #define NFT_EXPR_SIZE(size) (sizeof(struct nft_expr) + \ 74996518518SPatrick McHardy ALIGN(size, __alignof__(struct nft_expr))) 75096518518SPatrick McHardy 75196518518SPatrick McHardy /** 75296518518SPatrick McHardy * struct nft_expr - nf_tables expression 75396518518SPatrick McHardy * 75496518518SPatrick McHardy * @ops: expression ops 75596518518SPatrick McHardy * @data: expression private data 75696518518SPatrick McHardy */ 75796518518SPatrick McHardy struct nft_expr { 75896518518SPatrick McHardy const struct nft_expr_ops *ops; 75996518518SPatrick McHardy unsigned char data[]; 76096518518SPatrick McHardy }; 76196518518SPatrick McHardy 76296518518SPatrick McHardy static inline void *nft_expr_priv(const struct nft_expr *expr) 76396518518SPatrick McHardy { 76496518518SPatrick McHardy return (void *)expr->data; 76596518518SPatrick McHardy } 76696518518SPatrick McHardy 7670b2d8a7bSPatrick McHardy struct nft_expr *nft_expr_init(const struct nft_ctx *ctx, 7680b2d8a7bSPatrick McHardy const struct nlattr *nla); 7690b2d8a7bSPatrick McHardy void nft_expr_destroy(const struct nft_ctx *ctx, struct nft_expr *expr); 7700b2d8a7bSPatrick McHardy int nft_expr_dump(struct sk_buff *skb, unsigned int attr, 7710b2d8a7bSPatrick McHardy const struct nft_expr *expr); 7720b2d8a7bSPatrick McHardy 773086f3321SPablo Neira Ayuso static inline int nft_expr_clone(struct nft_expr *dst, struct nft_expr *src) 7740b2d8a7bSPatrick McHardy { 775086f3321SPablo Neira Ayuso int err; 776086f3321SPablo Neira Ayuso 777086f3321SPablo Neira Ayuso if (src->ops->clone) { 778086f3321SPablo Neira Ayuso dst->ops = src->ops; 779086f3321SPablo Neira Ayuso err = src->ops->clone(dst, src); 780086f3321SPablo Neira Ayuso if (err < 0) 781086f3321SPablo Neira Ayuso return err; 782086f3321SPablo Neira Ayuso } else { 7830b2d8a7bSPatrick McHardy memcpy(dst, src, src->ops->size); 7840b2d8a7bSPatrick McHardy } 78561f9e292SLiping Zhang 78661f9e292SLiping Zhang __module_get(src->ops->type->owner); 787086f3321SPablo Neira Ayuso return 0; 788086f3321SPablo Neira Ayuso } 7890b2d8a7bSPatrick McHardy 79096518518SPatrick McHardy /** 79196518518SPatrick McHardy * struct nft_rule - nf_tables rule 79296518518SPatrick McHardy * 79396518518SPatrick McHardy * @list: used internally 79496518518SPatrick McHardy * @handle: rule handle 7950628b123SPablo Neira Ayuso * @genmask: generation mask 79696518518SPatrick McHardy * @dlen: length of expression data 79786f1ec32SPatrick McHardy * @udata: user data is appended to the rule 79896518518SPatrick McHardy * @data: expression data 79996518518SPatrick McHardy */ 80096518518SPatrick McHardy struct nft_rule { 80196518518SPatrick McHardy struct list_head list; 8020768b3b3SPablo Neira Ayuso u64 handle:42, 8030628b123SPablo Neira Ayuso genmask:2, 8040768b3b3SPablo Neira Ayuso dlen:12, 80586f1ec32SPatrick McHardy udata:1; 80696518518SPatrick McHardy unsigned char data[] 80796518518SPatrick McHardy __attribute__((aligned(__alignof__(struct nft_expr)))); 80896518518SPatrick McHardy }; 80996518518SPatrick McHardy 81096518518SPatrick McHardy static inline struct nft_expr *nft_expr_first(const struct nft_rule *rule) 81196518518SPatrick McHardy { 81296518518SPatrick McHardy return (struct nft_expr *)&rule->data[0]; 81396518518SPatrick McHardy } 81496518518SPatrick McHardy 81596518518SPatrick McHardy static inline struct nft_expr *nft_expr_next(const struct nft_expr *expr) 81696518518SPatrick McHardy { 81796518518SPatrick McHardy return ((void *)expr) + expr->ops->size; 81896518518SPatrick McHardy } 81996518518SPatrick McHardy 82096518518SPatrick McHardy static inline struct nft_expr *nft_expr_last(const struct nft_rule *rule) 82196518518SPatrick McHardy { 82296518518SPatrick McHardy return (struct nft_expr *)&rule->data[rule->dlen]; 82396518518SPatrick McHardy } 82496518518SPatrick McHardy 82586f1ec32SPatrick McHardy static inline struct nft_userdata *nft_userdata(const struct nft_rule *rule) 8260768b3b3SPablo Neira Ayuso { 8270768b3b3SPablo Neira Ayuso return (void *)&rule->data[rule->dlen]; 8280768b3b3SPablo Neira Ayuso } 8290768b3b3SPablo Neira Ayuso 83096518518SPatrick McHardy /* 83196518518SPatrick McHardy * The last pointer isn't really necessary, but the compiler isn't able to 83296518518SPatrick McHardy * determine that the result of nft_expr_last() is always the same since it 83396518518SPatrick McHardy * can't assume that the dlen value wasn't changed within calls in the loop. 83496518518SPatrick McHardy */ 83596518518SPatrick McHardy #define nft_rule_for_each_expr(expr, last, rule) \ 83696518518SPatrick McHardy for ((expr) = nft_expr_first(rule), (last) = nft_expr_last(rule); \ 83796518518SPatrick McHardy (expr) != (last); \ 83896518518SPatrick McHardy (expr) = nft_expr_next(expr)) 83996518518SPatrick McHardy 84096518518SPatrick McHardy enum nft_chain_flags { 84196518518SPatrick McHardy NFT_BASE_CHAIN = 0x1, 84296518518SPatrick McHardy }; 84396518518SPatrick McHardy 84496518518SPatrick McHardy /** 84596518518SPatrick McHardy * struct nft_chain - nf_tables chain 84696518518SPatrick McHardy * 84796518518SPatrick McHardy * @rules: list of rules in the chain 84896518518SPatrick McHardy * @list: used internally 849b5bc89bfSPablo Neira Ayuso * @table: table that this chain belongs to 85096518518SPatrick McHardy * @handle: chain handle 85196518518SPatrick McHardy * @use: number of jump references to this chain 85296518518SPatrick McHardy * @level: length of longest path to this chain 853a0a7379eSPablo Neira Ayuso * @flags: bitmask of enum nft_chain_flags 85496518518SPatrick McHardy * @name: name of the chain 85596518518SPatrick McHardy */ 85696518518SPatrick McHardy struct nft_chain { 85796518518SPatrick McHardy struct list_head rules; 85896518518SPatrick McHardy struct list_head list; 859b5bc89bfSPablo Neira Ayuso struct nft_table *table; 86096518518SPatrick McHardy u64 handle; 861a0a7379eSPablo Neira Ayuso u32 use; 86296518518SPatrick McHardy u16 level; 863664b0f8cSPablo Neira Ayuso u8 flags:6, 864664b0f8cSPablo Neira Ayuso genmask:2; 865b7263e07SPhil Sutter char *name; 86696518518SPatrick McHardy }; 86796518518SPatrick McHardy 8689370761cSPablo Neira Ayuso enum nft_chain_type { 8699370761cSPablo Neira Ayuso NFT_CHAIN_T_DEFAULT = 0, 8709370761cSPablo Neira Ayuso NFT_CHAIN_T_ROUTE, 8719370761cSPablo Neira Ayuso NFT_CHAIN_T_NAT, 8729370761cSPablo Neira Ayuso NFT_CHAIN_T_MAX 8739370761cSPablo Neira Ayuso }; 8749370761cSPablo Neira Ayuso 8751a1e1a12SPatrick McHardy /** 8761a1e1a12SPatrick McHardy * struct nf_chain_type - nf_tables chain type info 8771a1e1a12SPatrick McHardy * 8781a1e1a12SPatrick McHardy * @name: name of the type 8791a1e1a12SPatrick McHardy * @type: numeric identifier 8801a1e1a12SPatrick McHardy * @family: address family 8811a1e1a12SPatrick McHardy * @owner: module owner 8821a1e1a12SPatrick McHardy * @hook_mask: mask of valid hooks 883c2f9eafeSPablo Neira Ayuso * @hooks: array of hook functions 8841a1e1a12SPatrick McHardy */ 8851a1e1a12SPatrick McHardy struct nf_chain_type { 8861a1e1a12SPatrick McHardy const char *name; 8871a1e1a12SPatrick McHardy enum nft_chain_type type; 8881a1e1a12SPatrick McHardy int family; 8891a1e1a12SPatrick McHardy struct module *owner; 8901a1e1a12SPatrick McHardy unsigned int hook_mask; 8911a1e1a12SPatrick McHardy nf_hookfn *hooks[NF_MAX_HOOKS]; 8921a1e1a12SPatrick McHardy }; 8931a1e1a12SPatrick McHardy 8947210e4e3SPablo Neira Ayuso int nft_chain_validate_dependency(const struct nft_chain *chain, 8957210e4e3SPablo Neira Ayuso enum nft_chain_type type); 89675e8d06dSPablo Neira Ayuso int nft_chain_validate_hooks(const struct nft_chain *chain, 89775e8d06dSPablo Neira Ayuso unsigned int hook_flags); 8987210e4e3SPablo Neira Ayuso 8990ca743a5SPablo Neira Ayuso struct nft_stats { 9000ca743a5SPablo Neira Ayuso u64 bytes; 9010ca743a5SPablo Neira Ayuso u64 pkts; 902ce355e20SEric Dumazet struct u64_stats_sync syncp; 9030ca743a5SPablo Neira Ayuso }; 9040ca743a5SPablo Neira Ayuso 90596518518SPatrick McHardy /** 90696518518SPatrick McHardy * struct nft_base_chain - nf_tables base chain 90796518518SPatrick McHardy * 90896518518SPatrick McHardy * @ops: netfilter hook ops 9099370761cSPablo Neira Ayuso * @type: chain type 9100ca743a5SPablo Neira Ayuso * @policy: default policy 9110ca743a5SPablo Neira Ayuso * @stats: per-cpu chain stats 91296518518SPatrick McHardy * @chain: the chain 9132cbce139SPablo Neira Ayuso * @dev_name: device name that this base chain is attached to (if any) 91496518518SPatrick McHardy */ 91596518518SPatrick McHardy struct nft_base_chain { 916c974a3a3SPablo Neira Ayuso struct nf_hook_ops ops; 9172a37d755SPatrick McHardy const struct nf_chain_type *type; 9180ca743a5SPablo Neira Ayuso u8 policy; 919835b8033SPablo Neira Ayuso u8 flags; 9200ca743a5SPablo Neira Ayuso struct nft_stats __percpu *stats; 92196518518SPatrick McHardy struct nft_chain chain; 9222cbce139SPablo Neira Ayuso char dev_name[IFNAMSIZ]; 92396518518SPatrick McHardy }; 92496518518SPatrick McHardy 92596518518SPatrick McHardy static inline struct nft_base_chain *nft_base_chain(const struct nft_chain *chain) 92696518518SPatrick McHardy { 92796518518SPatrick McHardy return container_of(chain, struct nft_base_chain, chain); 92896518518SPatrick McHardy } 92996518518SPatrick McHardy 930f323d954SPablo Neira Ayuso static inline bool nft_is_base_chain(const struct nft_chain *chain) 931f323d954SPablo Neira Ayuso { 932f323d954SPablo Neira Ayuso return chain->flags & NFT_BASE_CHAIN; 933f323d954SPablo Neira Ayuso } 934f323d954SPablo Neira Ayuso 9355ebe0b0eSPablo Neira Ayuso int __nft_release_basechain(struct nft_ctx *ctx); 936835b8033SPablo Neira Ayuso 93706198b34SEric W. Biederman unsigned int nft_do_chain(struct nft_pktinfo *pkt, void *priv); 93896518518SPatrick McHardy 93996518518SPatrick McHardy /** 94096518518SPatrick McHardy * struct nft_table - nf_tables table 94196518518SPatrick McHardy * 94296518518SPatrick McHardy * @list: used internally 94396518518SPatrick McHardy * @chains: chains in the table 94496518518SPatrick McHardy * @sets: sets in the table 945e5009240SPablo Neira Ayuso * @objects: stateful objects in the table 94696518518SPatrick McHardy * @hgenerator: handle generator state 94796518518SPatrick McHardy * @use: number of chain references to this table 94896518518SPatrick McHardy * @flags: table flag (see enum nft_table_flags) 949f2a6d766SPablo Neira Ayuso * @genmask: generation mask 95096518518SPatrick McHardy * @name: name of the table 95196518518SPatrick McHardy */ 95296518518SPatrick McHardy struct nft_table { 95396518518SPatrick McHardy struct list_head list; 95496518518SPatrick McHardy struct list_head chains; 95596518518SPatrick McHardy struct list_head sets; 956e5009240SPablo Neira Ayuso struct list_head objects; 95796518518SPatrick McHardy u64 hgenerator; 95896518518SPatrick McHardy u32 use; 959f2a6d766SPablo Neira Ayuso u16 flags:14, 960f2a6d766SPablo Neira Ayuso genmask:2; 961e46abbccSPhil Sutter char *name; 962ebddf1a8SPablo Neira Ayuso }; 963ebddf1a8SPablo Neira Ayuso 964ebddf1a8SPablo Neira Ayuso enum nft_af_flags { 965ebddf1a8SPablo Neira Ayuso NFT_AF_NEEDS_DEV = (1 << 0), 96696518518SPatrick McHardy }; 96796518518SPatrick McHardy 96896518518SPatrick McHardy /** 96996518518SPatrick McHardy * struct nft_af_info - nf_tables address family info 97096518518SPatrick McHardy * 97196518518SPatrick McHardy * @list: used internally 97296518518SPatrick McHardy * @family: address family 97396518518SPatrick McHardy * @nhooks: number of hooks in this family 97496518518SPatrick McHardy * @owner: module owner 97596518518SPatrick McHardy * @tables: used internally 976ebddf1a8SPablo Neira Ayuso * @flags: family flags 97796518518SPatrick McHardy */ 97896518518SPatrick McHardy struct nft_af_info { 97996518518SPatrick McHardy struct list_head list; 98096518518SPatrick McHardy int family; 98196518518SPatrick McHardy unsigned int nhooks; 98296518518SPatrick McHardy struct module *owner; 98396518518SPatrick McHardy struct list_head tables; 984ebddf1a8SPablo Neira Ayuso u32 flags; 98596518518SPatrick McHardy }; 98696518518SPatrick McHardy 9875eccdfaaSJoe Perches int nft_register_afinfo(struct net *, struct nft_af_info *); 988df05ef87SPablo Neira Ayuso void nft_unregister_afinfo(struct net *, struct nft_af_info *); 98996518518SPatrick McHardy 9902a37d755SPatrick McHardy int nft_register_chain_type(const struct nf_chain_type *); 9912a37d755SPatrick McHardy void nft_unregister_chain_type(const struct nf_chain_type *); 99296518518SPatrick McHardy 9935eccdfaaSJoe Perches int nft_register_expr(struct nft_expr_type *); 9945eccdfaaSJoe Perches void nft_unregister_expr(struct nft_expr_type *); 99596518518SPatrick McHardy 99633d5a7b1SFlorian Westphal int nft_verdict_dump(struct sk_buff *skb, int type, 99733d5a7b1SFlorian Westphal const struct nft_verdict *v); 99833d5a7b1SFlorian Westphal 99933d5a7b1SFlorian Westphal /** 1000e5009240SPablo Neira Ayuso * struct nft_object - nf_tables stateful object 1001e5009240SPablo Neira Ayuso * 1002e5009240SPablo Neira Ayuso * @list: table stateful object list node 100318965317SPablo Neira Ayuso * @table: table this object belongs to 1004e5009240SPablo Neira Ayuso * @name: name of this stateful object 1005e5009240SPablo Neira Ayuso * @genmask: generation mask 1006e5009240SPablo Neira Ayuso * @use: number of references to this stateful object 1007e5009240SPablo Neira Ayuso * @data: object data, layout depends on type 1008dfc46034SPablo M. Bermudo Garay * @ops: object operations 1009dfc46034SPablo M. Bermudo Garay * @data: pointer to object data 1010e5009240SPablo Neira Ayuso */ 1011e5009240SPablo Neira Ayuso struct nft_object { 1012e5009240SPablo Neira Ayuso struct list_head list; 101361509575SPhil Sutter char *name; 101418965317SPablo Neira Ayuso struct nft_table *table; 1015e5009240SPablo Neira Ayuso u32 genmask:2, 1016e5009240SPablo Neira Ayuso use:30; 1017e5009240SPablo Neira Ayuso /* runtime data below here */ 1018dfc46034SPablo M. Bermudo Garay const struct nft_object_ops *ops ____cacheline_aligned; 1019e5009240SPablo Neira Ayuso unsigned char data[] 1020e5009240SPablo Neira Ayuso __attribute__((aligned(__alignof__(u64)))); 1021e5009240SPablo Neira Ayuso }; 1022e5009240SPablo Neira Ayuso 1023e5009240SPablo Neira Ayuso static inline void *nft_obj_data(const struct nft_object *obj) 1024e5009240SPablo Neira Ayuso { 1025e5009240SPablo Neira Ayuso return (void *)obj->data; 1026e5009240SPablo Neira Ayuso } 1027e5009240SPablo Neira Ayuso 1028e5009240SPablo Neira Ayuso #define nft_expr_obj(expr) *((struct nft_object **)nft_expr_priv(expr)) 1029e5009240SPablo Neira Ayuso 1030e5009240SPablo Neira Ayuso struct nft_object *nf_tables_obj_lookup(const struct nft_table *table, 1031e5009240SPablo Neira Ayuso const struct nlattr *nla, u32 objtype, 1032e5009240SPablo Neira Ayuso u8 genmask); 1033e5009240SPablo Neira Ayuso 103425e94a99SPablo Neira Ayuso void nft_obj_notify(struct net *net, struct nft_table *table, 10352599e989SPablo Neira Ayuso struct nft_object *obj, u32 portid, u32 seq, 10362599e989SPablo Neira Ayuso int event, int family, int report, gfp_t gfp); 10372599e989SPablo Neira Ayuso 1038e5009240SPablo Neira Ayuso /** 1039e5009240SPablo Neira Ayuso * struct nft_object_type - stateful object type 1040e5009240SPablo Neira Ayuso * 1041dfc46034SPablo M. Bermudo Garay * @select_ops: function to select nft_object_ops 1042dfc46034SPablo M. Bermudo Garay * @ops: default ops, used when no select_ops functions is present 1043e5009240SPablo Neira Ayuso * @list: list node in list of object types 1044e5009240SPablo Neira Ayuso * @type: stateful object numeric type 1045e5009240SPablo Neira Ayuso * @owner: module owner 1046e5009240SPablo Neira Ayuso * @maxattr: maximum netlink attribute 1047e5009240SPablo Neira Ayuso * @policy: netlink attribute policy 1048dfc46034SPablo M. Bermudo Garay */ 1049dfc46034SPablo M. Bermudo Garay struct nft_object_type { 1050dfc46034SPablo M. Bermudo Garay const struct nft_object_ops *(*select_ops)(const struct nft_ctx *, 1051dfc46034SPablo M. Bermudo Garay const struct nlattr * const tb[]); 1052dfc46034SPablo M. Bermudo Garay const struct nft_object_ops *ops; 1053dfc46034SPablo M. Bermudo Garay struct list_head list; 1054dfc46034SPablo M. Bermudo Garay u32 type; 1055dfc46034SPablo M. Bermudo Garay unsigned int maxattr; 1056dfc46034SPablo M. Bermudo Garay struct module *owner; 1057dfc46034SPablo M. Bermudo Garay const struct nla_policy *policy; 1058dfc46034SPablo M. Bermudo Garay }; 1059dfc46034SPablo M. Bermudo Garay 1060dfc46034SPablo M. Bermudo Garay /** 1061dfc46034SPablo M. Bermudo Garay * struct nft_object_ops - stateful object operations 1062dfc46034SPablo M. Bermudo Garay * 1063dfc46034SPablo M. Bermudo Garay * @eval: stateful object evaluation function 1064dfc46034SPablo M. Bermudo Garay * @size: stateful object size 1065e5009240SPablo Neira Ayuso * @init: initialize object from netlink attributes 1066e5009240SPablo Neira Ayuso * @destroy: release existing stateful object 1067e5009240SPablo Neira Ayuso * @dump: netlink dump stateful object 1068e5009240SPablo Neira Ayuso */ 1069dfc46034SPablo M. Bermudo Garay struct nft_object_ops { 1070e5009240SPablo Neira Ayuso void (*eval)(struct nft_object *obj, 1071e5009240SPablo Neira Ayuso struct nft_regs *regs, 1072e5009240SPablo Neira Ayuso const struct nft_pktinfo *pkt); 1073e5009240SPablo Neira Ayuso unsigned int size; 107484fba055SFlorian Westphal int (*init)(const struct nft_ctx *ctx, 107584fba055SFlorian Westphal const struct nlattr *const tb[], 1076e5009240SPablo Neira Ayuso struct nft_object *obj); 1077e5009240SPablo Neira Ayuso void (*destroy)(struct nft_object *obj); 1078e5009240SPablo Neira Ayuso int (*dump)(struct sk_buff *skb, 107943da04a5SPablo Neira Ayuso struct nft_object *obj, 108043da04a5SPablo Neira Ayuso bool reset); 1081dfc46034SPablo M. Bermudo Garay const struct nft_object_type *type; 1082e5009240SPablo Neira Ayuso }; 1083e5009240SPablo Neira Ayuso 1084e5009240SPablo Neira Ayuso int nft_register_obj(struct nft_object_type *obj_type); 1085e5009240SPablo Neira Ayuso void nft_unregister_obj(struct nft_object_type *obj_type); 1086e5009240SPablo Neira Ayuso 1087e5009240SPablo Neira Ayuso /** 108833d5a7b1SFlorian Westphal * struct nft_traceinfo - nft tracing information and state 108933d5a7b1SFlorian Westphal * 109033d5a7b1SFlorian Westphal * @pkt: pktinfo currently processed 109133d5a7b1SFlorian Westphal * @basechain: base chain currently processed 109233d5a7b1SFlorian Westphal * @chain: chain currently processed 109333d5a7b1SFlorian Westphal * @rule: rule that was evaluated 109433d5a7b1SFlorian Westphal * @verdict: verdict given by rule 109533d5a7b1SFlorian Westphal * @type: event type (enum nft_trace_types) 109633d5a7b1SFlorian Westphal * @packet_dumped: packet headers sent in a previous traceinfo message 109733d5a7b1SFlorian Westphal * @trace: other struct members are initialised 109833d5a7b1SFlorian Westphal */ 109933d5a7b1SFlorian Westphal struct nft_traceinfo { 110033d5a7b1SFlorian Westphal const struct nft_pktinfo *pkt; 110133d5a7b1SFlorian Westphal const struct nft_base_chain *basechain; 110233d5a7b1SFlorian Westphal const struct nft_chain *chain; 110333d5a7b1SFlorian Westphal const struct nft_rule *rule; 110433d5a7b1SFlorian Westphal const struct nft_verdict *verdict; 110533d5a7b1SFlorian Westphal enum nft_trace_types type; 110633d5a7b1SFlorian Westphal bool packet_dumped; 110733d5a7b1SFlorian Westphal bool trace; 110833d5a7b1SFlorian Westphal }; 110933d5a7b1SFlorian Westphal 111033d5a7b1SFlorian Westphal void nft_trace_init(struct nft_traceinfo *info, const struct nft_pktinfo *pkt, 111133d5a7b1SFlorian Westphal const struct nft_verdict *verdict, 111233d5a7b1SFlorian Westphal const struct nft_chain *basechain); 111333d5a7b1SFlorian Westphal 111433d5a7b1SFlorian Westphal void nft_trace_notify(struct nft_traceinfo *info); 111533d5a7b1SFlorian Westphal 111667a8fc27SPatrick McHardy #define nft_dereference(p) \ 111767a8fc27SPatrick McHardy nfnl_dereference(p, NFNL_SUBSYS_NFTABLES) 111867a8fc27SPatrick McHardy 111996518518SPatrick McHardy #define MODULE_ALIAS_NFT_FAMILY(family) \ 112096518518SPatrick McHardy MODULE_ALIAS("nft-afinfo-" __stringify(family)) 112196518518SPatrick McHardy 11229370761cSPablo Neira Ayuso #define MODULE_ALIAS_NFT_CHAIN(family, name) \ 11239370761cSPablo Neira Ayuso MODULE_ALIAS("nft-chain-" __stringify(family) "-" name) 112496518518SPatrick McHardy 112564d46806SPatrick McHardy #define MODULE_ALIAS_NFT_AF_EXPR(family, name) \ 112664d46806SPatrick McHardy MODULE_ALIAS("nft-expr-" __stringify(family) "-" name) 112764d46806SPatrick McHardy 112896518518SPatrick McHardy #define MODULE_ALIAS_NFT_EXPR(name) \ 112996518518SPatrick McHardy MODULE_ALIAS("nft-expr-" name) 113096518518SPatrick McHardy 113120a69341SPatrick McHardy #define MODULE_ALIAS_NFT_SET() \ 113220a69341SPatrick McHardy MODULE_ALIAS("nft-set") 113320a69341SPatrick McHardy 1134e5009240SPablo Neira Ayuso #define MODULE_ALIAS_NFT_OBJ(type) \ 1135e5009240SPablo Neira Ayuso MODULE_ALIAS("nft-obj-" __stringify(type)) 1136e5009240SPablo Neira Ayuso 1137ea4bd995SPatrick McHardy /* 1138ea4bd995SPatrick McHardy * The gencursor defines two generations, the currently active and the 1139ea4bd995SPatrick McHardy * next one. Objects contain a bitmask of 2 bits specifying the generations 1140ea4bd995SPatrick McHardy * they're active in. A set bit means they're inactive in the generation 1141ea4bd995SPatrick McHardy * represented by that bit. 1142ea4bd995SPatrick McHardy * 1143ea4bd995SPatrick McHardy * New objects start out as inactive in the current and active in the 1144ea4bd995SPatrick McHardy * next generation. When committing the ruleset the bitmask is cleared, 1145ea4bd995SPatrick McHardy * meaning they're active in all generations. When removing an object, 1146ea4bd995SPatrick McHardy * it is set inactive in the next generation. After committing the ruleset, 1147ea4bd995SPatrick McHardy * the objects are removed. 1148ea4bd995SPatrick McHardy */ 1149ea4bd995SPatrick McHardy static inline unsigned int nft_gencursor_next(const struct net *net) 1150ea4bd995SPatrick McHardy { 1151ea4bd995SPatrick McHardy return net->nft.gencursor + 1 == 1 ? 1 : 0; 1152ea4bd995SPatrick McHardy } 1153ea4bd995SPatrick McHardy 1154ea4bd995SPatrick McHardy static inline u8 nft_genmask_next(const struct net *net) 1155ea4bd995SPatrick McHardy { 1156ea4bd995SPatrick McHardy return 1 << nft_gencursor_next(net); 1157ea4bd995SPatrick McHardy } 1158ea4bd995SPatrick McHardy 1159ea4bd995SPatrick McHardy static inline u8 nft_genmask_cur(const struct net *net) 1160ea4bd995SPatrick McHardy { 116114cd5d4aSMark Rutland /* Use READ_ONCE() to prevent refetching the value for atomicity */ 116214cd5d4aSMark Rutland return 1 << READ_ONCE(net->nft.gencursor); 1163ea4bd995SPatrick McHardy } 1164ea4bd995SPatrick McHardy 116522fe54d5SPatrick McHardy #define NFT_GENMASK_ANY ((1 << 0) | (1 << 1)) 116622fe54d5SPatrick McHardy 1167cc02e457SPatrick McHardy /* 1168889f7ee7SPablo Neira Ayuso * Generic transaction helpers 1169889f7ee7SPablo Neira Ayuso */ 1170889f7ee7SPablo Neira Ayuso 1171889f7ee7SPablo Neira Ayuso /* Check if this object is currently active. */ 1172889f7ee7SPablo Neira Ayuso #define nft_is_active(__net, __obj) \ 1173889f7ee7SPablo Neira Ayuso (((__obj)->genmask & nft_genmask_cur(__net)) == 0) 1174889f7ee7SPablo Neira Ayuso 1175889f7ee7SPablo Neira Ayuso /* Check if this object is active in the next generation. */ 1176889f7ee7SPablo Neira Ayuso #define nft_is_active_next(__net, __obj) \ 1177889f7ee7SPablo Neira Ayuso (((__obj)->genmask & nft_genmask_next(__net)) == 0) 1178889f7ee7SPablo Neira Ayuso 1179889f7ee7SPablo Neira Ayuso /* This object becomes active in the next generation. */ 1180889f7ee7SPablo Neira Ayuso #define nft_activate_next(__net, __obj) \ 1181889f7ee7SPablo Neira Ayuso (__obj)->genmask = nft_genmask_cur(__net) 1182889f7ee7SPablo Neira Ayuso 1183889f7ee7SPablo Neira Ayuso /* This object becomes inactive in the next generation. */ 1184889f7ee7SPablo Neira Ayuso #define nft_deactivate_next(__net, __obj) \ 1185889f7ee7SPablo Neira Ayuso (__obj)->genmask = nft_genmask_next(__net) 1186889f7ee7SPablo Neira Ayuso 1187889f7ee7SPablo Neira Ayuso /* After committing the ruleset, clear the stale generation bit. */ 1188889f7ee7SPablo Neira Ayuso #define nft_clear(__net, __obj) \ 1189889f7ee7SPablo Neira Ayuso (__obj)->genmask &= ~nft_genmask_next(__net) 1190f2a6d766SPablo Neira Ayuso #define nft_active_genmask(__obj, __genmask) \ 1191f2a6d766SPablo Neira Ayuso !((__obj)->genmask & __genmask) 1192889f7ee7SPablo Neira Ayuso 1193889f7ee7SPablo Neira Ayuso /* 1194cc02e457SPatrick McHardy * Set element transaction helpers 1195cc02e457SPatrick McHardy */ 1196cc02e457SPatrick McHardy 1197cc02e457SPatrick McHardy static inline bool nft_set_elem_active(const struct nft_set_ext *ext, 1198cc02e457SPatrick McHardy u8 genmask) 1199cc02e457SPatrick McHardy { 1200cc02e457SPatrick McHardy return !(ext->genmask & genmask); 1201cc02e457SPatrick McHardy } 1202cc02e457SPatrick McHardy 120342a55769SPablo Neira Ayuso static inline void nft_set_elem_change_active(const struct net *net, 120442a55769SPablo Neira Ayuso const struct nft_set *set, 1205cc02e457SPatrick McHardy struct nft_set_ext *ext) 1206cc02e457SPatrick McHardy { 120742a55769SPablo Neira Ayuso ext->genmask ^= nft_genmask_next(net); 1208cc02e457SPatrick McHardy } 1209cc02e457SPatrick McHardy 121069086658SPatrick McHardy /* 121169086658SPatrick McHardy * We use a free bit in the genmask field to indicate the element 121269086658SPatrick McHardy * is busy, meaning it is currently being processed either by 121369086658SPatrick McHardy * the netlink API or GC. 121469086658SPatrick McHardy * 121569086658SPatrick McHardy * Even though the genmask is only a single byte wide, this works 121669086658SPatrick McHardy * because the extension structure if fully constant once initialized, 121769086658SPatrick McHardy * so there are no non-atomic write accesses unless it is already 121869086658SPatrick McHardy * marked busy. 121969086658SPatrick McHardy */ 122069086658SPatrick McHardy #define NFT_SET_ELEM_BUSY_MASK (1 << 2) 122169086658SPatrick McHardy 122269086658SPatrick McHardy #if defined(__LITTLE_ENDIAN_BITFIELD) 122369086658SPatrick McHardy #define NFT_SET_ELEM_BUSY_BIT 2 122469086658SPatrick McHardy #elif defined(__BIG_ENDIAN_BITFIELD) 122569086658SPatrick McHardy #define NFT_SET_ELEM_BUSY_BIT (BITS_PER_LONG - BITS_PER_BYTE + 2) 122669086658SPatrick McHardy #else 122769086658SPatrick McHardy #error 122869086658SPatrick McHardy #endif 122969086658SPatrick McHardy 123069086658SPatrick McHardy static inline int nft_set_elem_mark_busy(struct nft_set_ext *ext) 123169086658SPatrick McHardy { 123269086658SPatrick McHardy unsigned long *word = (unsigned long *)ext; 123369086658SPatrick McHardy 123469086658SPatrick McHardy BUILD_BUG_ON(offsetof(struct nft_set_ext, genmask) != 0); 123569086658SPatrick McHardy return test_and_set_bit(NFT_SET_ELEM_BUSY_BIT, word); 123669086658SPatrick McHardy } 123769086658SPatrick McHardy 123869086658SPatrick McHardy static inline void nft_set_elem_clear_busy(struct nft_set_ext *ext) 123969086658SPatrick McHardy { 124069086658SPatrick McHardy unsigned long *word = (unsigned long *)ext; 124169086658SPatrick McHardy 124269086658SPatrick McHardy clear_bit(NFT_SET_ELEM_BUSY_BIT, word); 124369086658SPatrick McHardy } 124469086658SPatrick McHardy 12451a1e1a12SPatrick McHardy /** 12461a1e1a12SPatrick McHardy * struct nft_trans - nf_tables object update in transaction 12471a1e1a12SPatrick McHardy * 12481a1e1a12SPatrick McHardy * @list: used internally 12491a1e1a12SPatrick McHardy * @msg_type: message type 12501a1e1a12SPatrick McHardy * @ctx: transaction context 12511a1e1a12SPatrick McHardy * @data: internal information related to the transaction 12521a1e1a12SPatrick McHardy */ 12531a1e1a12SPatrick McHardy struct nft_trans { 12541a1e1a12SPatrick McHardy struct list_head list; 12551a1e1a12SPatrick McHardy int msg_type; 12561a1e1a12SPatrick McHardy struct nft_ctx ctx; 12571a1e1a12SPatrick McHardy char data[0]; 12581a1e1a12SPatrick McHardy }; 12591a1e1a12SPatrick McHardy 12601a1e1a12SPatrick McHardy struct nft_trans_rule { 12611a1e1a12SPatrick McHardy struct nft_rule *rule; 12621a94e38dSPablo Neira Ayuso u32 rule_id; 12631a1e1a12SPatrick McHardy }; 12641a1e1a12SPatrick McHardy 12651a1e1a12SPatrick McHardy #define nft_trans_rule(trans) \ 12661a1e1a12SPatrick McHardy (((struct nft_trans_rule *)trans->data)->rule) 12671a94e38dSPablo Neira Ayuso #define nft_trans_rule_id(trans) \ 12681a94e38dSPablo Neira Ayuso (((struct nft_trans_rule *)trans->data)->rule_id) 12691a1e1a12SPatrick McHardy 12701a1e1a12SPatrick McHardy struct nft_trans_set { 12711a1e1a12SPatrick McHardy struct nft_set *set; 12721a1e1a12SPatrick McHardy u32 set_id; 12731a1e1a12SPatrick McHardy }; 12741a1e1a12SPatrick McHardy 12751a1e1a12SPatrick McHardy #define nft_trans_set(trans) \ 12761a1e1a12SPatrick McHardy (((struct nft_trans_set *)trans->data)->set) 12771a1e1a12SPatrick McHardy #define nft_trans_set_id(trans) \ 12781a1e1a12SPatrick McHardy (((struct nft_trans_set *)trans->data)->set_id) 12791a1e1a12SPatrick McHardy 12801a1e1a12SPatrick McHardy struct nft_trans_chain { 12811a1e1a12SPatrick McHardy bool update; 1282b7263e07SPhil Sutter char *name; 12831a1e1a12SPatrick McHardy struct nft_stats __percpu *stats; 12841a1e1a12SPatrick McHardy u8 policy; 12851a1e1a12SPatrick McHardy }; 12861a1e1a12SPatrick McHardy 12871a1e1a12SPatrick McHardy #define nft_trans_chain_update(trans) \ 12881a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->update) 12891a1e1a12SPatrick McHardy #define nft_trans_chain_name(trans) \ 12901a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->name) 12911a1e1a12SPatrick McHardy #define nft_trans_chain_stats(trans) \ 12921a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->stats) 12931a1e1a12SPatrick McHardy #define nft_trans_chain_policy(trans) \ 12941a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->policy) 12951a1e1a12SPatrick McHardy 12961a1e1a12SPatrick McHardy struct nft_trans_table { 12971a1e1a12SPatrick McHardy bool update; 12981a1e1a12SPatrick McHardy bool enable; 12991a1e1a12SPatrick McHardy }; 13001a1e1a12SPatrick McHardy 13011a1e1a12SPatrick McHardy #define nft_trans_table_update(trans) \ 13021a1e1a12SPatrick McHardy (((struct nft_trans_table *)trans->data)->update) 13031a1e1a12SPatrick McHardy #define nft_trans_table_enable(trans) \ 13041a1e1a12SPatrick McHardy (((struct nft_trans_table *)trans->data)->enable) 13051a1e1a12SPatrick McHardy 13061a1e1a12SPatrick McHardy struct nft_trans_elem { 13071a1e1a12SPatrick McHardy struct nft_set *set; 13081a1e1a12SPatrick McHardy struct nft_set_elem elem; 13091a1e1a12SPatrick McHardy }; 13101a1e1a12SPatrick McHardy 13111a1e1a12SPatrick McHardy #define nft_trans_elem_set(trans) \ 13121a1e1a12SPatrick McHardy (((struct nft_trans_elem *)trans->data)->set) 13131a1e1a12SPatrick McHardy #define nft_trans_elem(trans) \ 13141a1e1a12SPatrick McHardy (((struct nft_trans_elem *)trans->data)->elem) 13151a1e1a12SPatrick McHardy 1316e5009240SPablo Neira Ayuso struct nft_trans_obj { 1317e5009240SPablo Neira Ayuso struct nft_object *obj; 1318e5009240SPablo Neira Ayuso }; 1319e5009240SPablo Neira Ayuso 1320e5009240SPablo Neira Ayuso #define nft_trans_obj(trans) \ 1321e5009240SPablo Neira Ayuso (((struct nft_trans_obj *)trans->data)->obj) 1322e5009240SPablo Neira Ayuso 132396518518SPatrick McHardy #endif /* _NET_NF_TABLES_H */ 1324