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; 1746448d00SEric W. Biederman struct net *net; 1896518518SPatrick McHardy const struct net_device *in; 1996518518SPatrick McHardy const struct net_device *out; 206aa187f2SEric W. Biederman u8 pf; 216aa187f2SEric W. Biederman u8 hook; 224566bf27SPatrick McHardy u8 tprot; 230ca743a5SPablo Neira Ayuso /* for x_tables compatibility */ 240ca743a5SPablo Neira Ayuso struct xt_action_param xt; 2596518518SPatrick McHardy }; 2696518518SPatrick McHardy 270ca743a5SPablo Neira Ayuso static inline void nft_set_pktinfo(struct nft_pktinfo *pkt, 280ca743a5SPablo Neira Ayuso struct sk_buff *skb, 29073bfd56SDavid S. Miller const struct nf_hook_state *state) 300ca743a5SPablo Neira Ayuso { 310ca743a5SPablo Neira Ayuso pkt->skb = skb; 3246448d00SEric W. Biederman pkt->net = pkt->xt.net = state->net; 33073bfd56SDavid S. Miller pkt->in = pkt->xt.in = state->in; 34073bfd56SDavid S. Miller pkt->out = pkt->xt.out = state->out; 356aa187f2SEric W. Biederman pkt->hook = pkt->xt.hooknum = state->hook; 366aa187f2SEric W. Biederman pkt->pf = pkt->xt.family = state->pf; 370ca743a5SPablo Neira Ayuso } 380ca743a5SPablo Neira Ayuso 39a55e22e9SPatrick McHardy /** 40a55e22e9SPatrick McHardy * struct nft_verdict - nf_tables verdict 41a55e22e9SPatrick McHardy * 42a55e22e9SPatrick McHardy * @code: nf_tables/netfilter verdict code 43a55e22e9SPatrick McHardy * @chain: destination chain for NFT_JUMP/NFT_GOTO 44a55e22e9SPatrick McHardy */ 45a55e22e9SPatrick McHardy struct nft_verdict { 46a55e22e9SPatrick McHardy u32 code; 47a55e22e9SPatrick McHardy struct nft_chain *chain; 48a55e22e9SPatrick McHardy }; 49a55e22e9SPatrick McHardy 5096518518SPatrick McHardy struct nft_data { 5196518518SPatrick McHardy union { 5296518518SPatrick McHardy u32 data[4]; 531ca2e170SPatrick McHardy struct nft_verdict verdict; 5496518518SPatrick McHardy }; 5596518518SPatrick McHardy } __attribute__((aligned(__alignof__(u64)))); 5696518518SPatrick McHardy 57a55e22e9SPatrick McHardy /** 58a55e22e9SPatrick McHardy * struct nft_regs - nf_tables register set 59a55e22e9SPatrick McHardy * 60a55e22e9SPatrick McHardy * @data: data registers 61a55e22e9SPatrick McHardy * @verdict: verdict register 62a55e22e9SPatrick McHardy * 63a55e22e9SPatrick McHardy * The first four data registers alias to the verdict register. 64a55e22e9SPatrick McHardy */ 65a55e22e9SPatrick McHardy struct nft_regs { 66a55e22e9SPatrick McHardy union { 6749499c3eSPatrick McHardy u32 data[20]; 68a55e22e9SPatrick McHardy struct nft_verdict verdict; 69a55e22e9SPatrick McHardy }; 70a55e22e9SPatrick McHardy }; 71a55e22e9SPatrick McHardy 7249499c3eSPatrick McHardy static inline void nft_data_copy(u32 *dst, const struct nft_data *src, 7349499c3eSPatrick McHardy unsigned int len) 7496518518SPatrick McHardy { 7549499c3eSPatrick McHardy memcpy(dst, src, len); 7696518518SPatrick McHardy } 7796518518SPatrick McHardy 7896518518SPatrick McHardy static inline void nft_data_debug(const struct nft_data *data) 7996518518SPatrick McHardy { 8096518518SPatrick McHardy pr_debug("data[0]=%x data[1]=%x data[2]=%x data[3]=%x\n", 8196518518SPatrick McHardy data->data[0], data->data[1], 8296518518SPatrick McHardy data->data[2], data->data[3]); 8396518518SPatrick McHardy } 8496518518SPatrick McHardy 8596518518SPatrick McHardy /** 8620a69341SPatrick McHardy * struct nft_ctx - nf_tables rule/set context 8796518518SPatrick McHardy * 8899633ab2SPablo Neira Ayuso * @net: net namespace 8996518518SPatrick McHardy * @afi: address family info 9096518518SPatrick McHardy * @table: the table the chain is contained in 9196518518SPatrick McHardy * @chain: the chain the rule is contained in 920ca743a5SPablo Neira Ayuso * @nla: netlink attributes 93128ad332SPablo Neira Ayuso * @portid: netlink portID of the original message 94128ad332SPablo Neira Ayuso * @seq: netlink sequence number 95128ad332SPablo Neira Ayuso * @report: notify via unicast netlink message 9696518518SPatrick McHardy */ 9796518518SPatrick McHardy struct nft_ctx { 9899633ab2SPablo Neira Ayuso struct net *net; 997c95f6d8SPablo Neira Ayuso struct nft_af_info *afi; 1007c95f6d8SPablo Neira Ayuso struct nft_table *table; 1017c95f6d8SPablo Neira Ayuso struct nft_chain *chain; 1020ca743a5SPablo Neira Ayuso const struct nlattr * const *nla; 103128ad332SPablo Neira Ayuso u32 portid; 104128ad332SPablo Neira Ayuso u32 seq; 105128ad332SPablo Neira Ayuso bool report; 10696518518SPatrick McHardy }; 10796518518SPatrick McHardy 10896518518SPatrick McHardy struct nft_data_desc { 10996518518SPatrick McHardy enum nft_data_types type; 11096518518SPatrick McHardy unsigned int len; 11196518518SPatrick McHardy }; 11296518518SPatrick McHardy 113d0a11fc3SPatrick McHardy int nft_data_init(const struct nft_ctx *ctx, 114d0a11fc3SPatrick McHardy struct nft_data *data, unsigned int size, 11596518518SPatrick McHardy struct nft_data_desc *desc, const struct nlattr *nla); 1165eccdfaaSJoe Perches void nft_data_uninit(const struct nft_data *data, enum nft_data_types type); 1175eccdfaaSJoe Perches int nft_data_dump(struct sk_buff *skb, int attr, const struct nft_data *data, 11896518518SPatrick McHardy enum nft_data_types type, unsigned int len); 11996518518SPatrick McHardy 12096518518SPatrick McHardy static inline enum nft_data_types nft_dreg_to_type(enum nft_registers reg) 12196518518SPatrick McHardy { 12296518518SPatrick McHardy return reg == NFT_REG_VERDICT ? NFT_DATA_VERDICT : NFT_DATA_VALUE; 12396518518SPatrick McHardy } 12496518518SPatrick McHardy 12520a69341SPatrick McHardy static inline enum nft_registers nft_type_to_reg(enum nft_data_types type) 12620a69341SPatrick McHardy { 127bf798657SPablo Neira Ayuso return type == NFT_DATA_VERDICT ? NFT_REG_VERDICT : NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE; 12820a69341SPatrick McHardy } 12920a69341SPatrick McHardy 130b1c96ed3SPatrick McHardy unsigned int nft_parse_register(const struct nlattr *attr); 131b1c96ed3SPatrick McHardy int nft_dump_register(struct sk_buff *skb, unsigned int attr, unsigned int reg); 132b1c96ed3SPatrick McHardy 133d07db988SPatrick McHardy int nft_validate_register_load(enum nft_registers reg, unsigned int len); 1341ec10212SPatrick McHardy int nft_validate_register_store(const struct nft_ctx *ctx, 1351ec10212SPatrick McHardy enum nft_registers reg, 13696518518SPatrick McHardy const struct nft_data *data, 13745d9bcdaSPatrick McHardy enum nft_data_types type, unsigned int len); 13896518518SPatrick McHardy 13986f1ec32SPatrick McHardy /** 14086f1ec32SPatrick McHardy * struct nft_userdata - user defined data associated with an object 14186f1ec32SPatrick McHardy * 14286f1ec32SPatrick McHardy * @len: length of the data 14386f1ec32SPatrick McHardy * @data: content 14486f1ec32SPatrick McHardy * 14586f1ec32SPatrick McHardy * The presence of user data is indicated in an object specific fashion, 14686f1ec32SPatrick McHardy * so a length of zero can't occur and the value "len" indicates data 14786f1ec32SPatrick McHardy * of length len + 1. 14886f1ec32SPatrick McHardy */ 14986f1ec32SPatrick McHardy struct nft_userdata { 15086f1ec32SPatrick McHardy u8 len; 15186f1ec32SPatrick McHardy unsigned char data[0]; 15286f1ec32SPatrick McHardy }; 15386f1ec32SPatrick McHardy 15496518518SPatrick McHardy /** 15520a69341SPatrick McHardy * struct nft_set_elem - generic representation of set elements 15620a69341SPatrick McHardy * 15720a69341SPatrick McHardy * @key: element key 158fe2811ebSPatrick McHardy * @priv: element private data and extensions 15920a69341SPatrick McHardy */ 16020a69341SPatrick McHardy struct nft_set_elem { 1617d740264SPatrick McHardy union { 1627d740264SPatrick McHardy u32 buf[NFT_DATA_VALUE_MAXLEN / sizeof(u32)]; 1637d740264SPatrick McHardy struct nft_data val; 1647d740264SPatrick McHardy } key; 165fe2811ebSPatrick McHardy void *priv; 16620a69341SPatrick McHardy }; 16720a69341SPatrick McHardy 16820a69341SPatrick McHardy struct nft_set; 16920a69341SPatrick McHardy struct nft_set_iter { 17020a69341SPatrick McHardy unsigned int count; 17120a69341SPatrick McHardy unsigned int skip; 17220a69341SPatrick McHardy int err; 17320a69341SPatrick McHardy int (*fn)(const struct nft_ctx *ctx, 17420a69341SPatrick McHardy const struct nft_set *set, 17520a69341SPatrick McHardy const struct nft_set_iter *iter, 17620a69341SPatrick McHardy const struct nft_set_elem *elem); 17720a69341SPatrick McHardy }; 17820a69341SPatrick McHardy 17920a69341SPatrick McHardy /** 180c50b960cSPatrick McHardy * struct nft_set_desc - description of set elements 181c50b960cSPatrick McHardy * 182c50b960cSPatrick McHardy * @klen: key length 183c50b960cSPatrick McHardy * @dlen: data length 184c50b960cSPatrick McHardy * @size: number of set elements 185c50b960cSPatrick McHardy */ 186c50b960cSPatrick McHardy struct nft_set_desc { 187c50b960cSPatrick McHardy unsigned int klen; 188c50b960cSPatrick McHardy unsigned int dlen; 189c50b960cSPatrick McHardy unsigned int size; 190c50b960cSPatrick McHardy }; 191c50b960cSPatrick McHardy 192c50b960cSPatrick McHardy /** 193c50b960cSPatrick McHardy * enum nft_set_class - performance class 194c50b960cSPatrick McHardy * 195c50b960cSPatrick McHardy * @NFT_LOOKUP_O_1: constant, O(1) 196c50b960cSPatrick McHardy * @NFT_LOOKUP_O_LOG_N: logarithmic, O(log N) 197c50b960cSPatrick McHardy * @NFT_LOOKUP_O_N: linear, O(N) 198c50b960cSPatrick McHardy */ 199c50b960cSPatrick McHardy enum nft_set_class { 200c50b960cSPatrick McHardy NFT_SET_CLASS_O_1, 201c50b960cSPatrick McHardy NFT_SET_CLASS_O_LOG_N, 202c50b960cSPatrick McHardy NFT_SET_CLASS_O_N, 203c50b960cSPatrick McHardy }; 204c50b960cSPatrick McHardy 205c50b960cSPatrick McHardy /** 206c50b960cSPatrick McHardy * struct nft_set_estimate - estimation of memory and performance 207c50b960cSPatrick McHardy * characteristics 208c50b960cSPatrick McHardy * 209c50b960cSPatrick McHardy * @size: required memory 210c50b960cSPatrick McHardy * @class: lookup performance class 211c50b960cSPatrick McHardy */ 212c50b960cSPatrick McHardy struct nft_set_estimate { 213c50b960cSPatrick McHardy unsigned int size; 214c50b960cSPatrick McHardy enum nft_set_class class; 215c50b960cSPatrick McHardy }; 216c50b960cSPatrick McHardy 217b2832dd6SPatrick McHardy struct nft_set_ext; 21822fe54d5SPatrick McHardy struct nft_expr; 219b2832dd6SPatrick McHardy 220c50b960cSPatrick McHardy /** 22120a69341SPatrick McHardy * struct nft_set_ops - nf_tables set operations 22220a69341SPatrick McHardy * 22320a69341SPatrick McHardy * @lookup: look up an element within the set 22420a69341SPatrick McHardy * @insert: insert new element into set 225cc02e457SPatrick McHardy * @activate: activate new element in the next generation 226cc02e457SPatrick McHardy * @deactivate: deactivate element in the next generation 22720a69341SPatrick McHardy * @remove: remove element from set 22820a69341SPatrick McHardy * @walk: iterate over all set elemeennts 22920a69341SPatrick McHardy * @privsize: function to return size of set private data 23020a69341SPatrick McHardy * @init: initialize private data of new set instance 23120a69341SPatrick McHardy * @destroy: destroy private data of set instance 23220a69341SPatrick McHardy * @list: nf_tables_set_ops list node 23320a69341SPatrick McHardy * @owner: module reference 234fe2811ebSPatrick McHardy * @elemsize: element private size 23520a69341SPatrick McHardy * @features: features supported by the implementation 23620a69341SPatrick McHardy */ 23720a69341SPatrick McHardy struct nft_set_ops { 23820a69341SPatrick McHardy bool (*lookup)(const struct nft_set *set, 2398cd8937aSPatrick McHardy const u32 *key, 240b2832dd6SPatrick McHardy const struct nft_set_ext **ext); 24122fe54d5SPatrick McHardy bool (*update)(struct nft_set *set, 2428cd8937aSPatrick McHardy const u32 *key, 24322fe54d5SPatrick McHardy void *(*new)(struct nft_set *, 24422fe54d5SPatrick McHardy const struct nft_expr *, 245a55e22e9SPatrick McHardy struct nft_regs *), 24622fe54d5SPatrick McHardy const struct nft_expr *expr, 247a55e22e9SPatrick McHardy struct nft_regs *regs, 24822fe54d5SPatrick McHardy const struct nft_set_ext **ext); 24922fe54d5SPatrick McHardy 25020a69341SPatrick McHardy int (*insert)(const struct nft_set *set, 25120a69341SPatrick McHardy const struct nft_set_elem *elem); 252cc02e457SPatrick McHardy void (*activate)(const struct nft_set *set, 253cc02e457SPatrick McHardy const struct nft_set_elem *elem); 254cc02e457SPatrick McHardy void * (*deactivate)(const struct nft_set *set, 255cc02e457SPatrick McHardy const struct nft_set_elem *elem); 25620a69341SPatrick McHardy void (*remove)(const struct nft_set *set, 25720a69341SPatrick McHardy const struct nft_set_elem *elem); 25820a69341SPatrick McHardy void (*walk)(const struct nft_ctx *ctx, 25920a69341SPatrick McHardy const struct nft_set *set, 26020a69341SPatrick McHardy struct nft_set_iter *iter); 26120a69341SPatrick McHardy 26220a69341SPatrick McHardy unsigned int (*privsize)(const struct nlattr * const nla[]); 263c50b960cSPatrick McHardy bool (*estimate)(const struct nft_set_desc *desc, 264c50b960cSPatrick McHardy u32 features, 265c50b960cSPatrick McHardy struct nft_set_estimate *est); 26620a69341SPatrick McHardy int (*init)(const struct nft_set *set, 267c50b960cSPatrick McHardy const struct nft_set_desc *desc, 26820a69341SPatrick McHardy const struct nlattr * const nla[]); 26920a69341SPatrick McHardy void (*destroy)(const struct nft_set *set); 27020a69341SPatrick McHardy 27120a69341SPatrick McHardy struct list_head list; 27220a69341SPatrick McHardy struct module *owner; 273fe2811ebSPatrick McHardy unsigned int elemsize; 27420a69341SPatrick McHardy u32 features; 27520a69341SPatrick McHardy }; 27620a69341SPatrick McHardy 2775eccdfaaSJoe Perches int nft_register_set(struct nft_set_ops *ops); 2785eccdfaaSJoe Perches void nft_unregister_set(struct nft_set_ops *ops); 27920a69341SPatrick McHardy 28020a69341SPatrick McHardy /** 28120a69341SPatrick McHardy * struct nft_set - nf_tables set instance 28220a69341SPatrick McHardy * 28320a69341SPatrick McHardy * @list: table set list node 28420a69341SPatrick McHardy * @bindings: list of set bindings 28520a69341SPatrick McHardy * @name: name of the set 28620a69341SPatrick McHardy * @ktype: key type (numeric type defined by userspace, not used in the kernel) 28720a69341SPatrick McHardy * @dtype: data type (verdict or numeric type defined by userspace) 288c50b960cSPatrick McHardy * @size: maximum set size 289c50b960cSPatrick McHardy * @nelems: number of elements 2903dd0673aSPatrick McHardy * @ndeact: number of deactivated elements queued for removal 291761da293SPatrick McHardy * @timeout: default timeout value in msecs 292761da293SPatrick McHardy * @gc_int: garbage collection interval in msecs 2939363dc4bSArturo Borrero * @policy: set parameterization (see enum nft_set_policies) 294e6d8ecacSCarlos Falgueras García * @udlen: user data length 295e6d8ecacSCarlos Falgueras García * @udata: user data 29620a69341SPatrick McHardy * @ops: set ops 297cc02e457SPatrick McHardy * @pnet: network namespace 29820a69341SPatrick McHardy * @flags: set flags 29920a69341SPatrick McHardy * @klen: key length 30020a69341SPatrick McHardy * @dlen: data length 30120a69341SPatrick McHardy * @data: private set data 30220a69341SPatrick McHardy */ 30320a69341SPatrick McHardy struct nft_set { 30420a69341SPatrick McHardy struct list_head list; 30520a69341SPatrick McHardy struct list_head bindings; 306cb39ad8bSPablo Neira Ayuso char name[NFT_SET_MAXNAMELEN]; 30720a69341SPatrick McHardy u32 ktype; 30820a69341SPatrick McHardy u32 dtype; 309c50b960cSPatrick McHardy u32 size; 3103dd0673aSPatrick McHardy atomic_t nelems; 3113dd0673aSPatrick McHardy u32 ndeact; 312761da293SPatrick McHardy u64 timeout; 313761da293SPatrick McHardy u32 gc_int; 3149363dc4bSArturo Borrero u16 policy; 315e6d8ecacSCarlos Falgueras García u16 udlen; 316e6d8ecacSCarlos Falgueras García unsigned char *udata; 31720a69341SPatrick McHardy /* runtime data below here */ 31820a69341SPatrick McHardy const struct nft_set_ops *ops ____cacheline_aligned; 319cc02e457SPatrick McHardy possible_net_t pnet; 32020a69341SPatrick McHardy u16 flags; 32120a69341SPatrick McHardy u8 klen; 32220a69341SPatrick McHardy u8 dlen; 32320a69341SPatrick McHardy unsigned char data[] 32420a69341SPatrick McHardy __attribute__((aligned(__alignof__(u64)))); 32520a69341SPatrick McHardy }; 32620a69341SPatrick McHardy 32720a69341SPatrick McHardy static inline void *nft_set_priv(const struct nft_set *set) 32820a69341SPatrick McHardy { 32920a69341SPatrick McHardy return (void *)set->data; 33020a69341SPatrick McHardy } 33120a69341SPatrick McHardy 3329d098292SPatrick McHardy static inline struct nft_set *nft_set_container_of(const void *priv) 3339d098292SPatrick McHardy { 3349d098292SPatrick McHardy return (void *)priv - offsetof(struct nft_set, data); 3359d098292SPatrick McHardy } 3369d098292SPatrick McHardy 3375eccdfaaSJoe Perches struct nft_set *nf_tables_set_lookup(const struct nft_table *table, 33820a69341SPatrick McHardy const struct nlattr *nla); 339958bee14SPablo Neira Ayuso struct nft_set *nf_tables_set_lookup_byid(const struct net *net, 340958bee14SPablo Neira Ayuso const struct nlattr *nla); 34120a69341SPatrick McHardy 342761da293SPatrick McHardy static inline unsigned long nft_set_gc_interval(const struct nft_set *set) 343761da293SPatrick McHardy { 344761da293SPatrick McHardy return set->gc_int ? msecs_to_jiffies(set->gc_int) : HZ; 345761da293SPatrick McHardy } 346761da293SPatrick McHardy 34720a69341SPatrick McHardy /** 34820a69341SPatrick McHardy * struct nft_set_binding - nf_tables set binding 34920a69341SPatrick McHardy * 35020a69341SPatrick McHardy * @list: set bindings list node 35120a69341SPatrick McHardy * @chain: chain containing the rule bound to the set 35211113e19SPatrick McHardy * @flags: set action flags 35320a69341SPatrick McHardy * 35420a69341SPatrick McHardy * A set binding contains all information necessary for validation 35520a69341SPatrick McHardy * of new elements added to a bound set. 35620a69341SPatrick McHardy */ 35720a69341SPatrick McHardy struct nft_set_binding { 35820a69341SPatrick McHardy struct list_head list; 35920a69341SPatrick McHardy const struct nft_chain *chain; 36011113e19SPatrick McHardy u32 flags; 36120a69341SPatrick McHardy }; 36220a69341SPatrick McHardy 3635eccdfaaSJoe Perches int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set, 36420a69341SPatrick McHardy struct nft_set_binding *binding); 3655eccdfaaSJoe Perches void nf_tables_unbind_set(const struct nft_ctx *ctx, struct nft_set *set, 36620a69341SPatrick McHardy struct nft_set_binding *binding); 36720a69341SPatrick McHardy 3683ac4c07aSPatrick McHardy /** 3693ac4c07aSPatrick McHardy * enum nft_set_extensions - set extension type IDs 3703ac4c07aSPatrick McHardy * 3713ac4c07aSPatrick McHardy * @NFT_SET_EXT_KEY: element key 3723ac4c07aSPatrick McHardy * @NFT_SET_EXT_DATA: mapping data 3733ac4c07aSPatrick McHardy * @NFT_SET_EXT_FLAGS: element flags 374c3e1b005SPatrick McHardy * @NFT_SET_EXT_TIMEOUT: element timeout 375c3e1b005SPatrick McHardy * @NFT_SET_EXT_EXPIRATION: element expiration time 37668e942e8SPatrick McHardy * @NFT_SET_EXT_USERDATA: user data associated with the element 377f25ad2e9SPatrick McHardy * @NFT_SET_EXT_EXPR: expression assiociated with the element 3783ac4c07aSPatrick McHardy * @NFT_SET_EXT_NUM: number of extension types 3793ac4c07aSPatrick McHardy */ 3803ac4c07aSPatrick McHardy enum nft_set_extensions { 3813ac4c07aSPatrick McHardy NFT_SET_EXT_KEY, 3823ac4c07aSPatrick McHardy NFT_SET_EXT_DATA, 3833ac4c07aSPatrick McHardy NFT_SET_EXT_FLAGS, 384c3e1b005SPatrick McHardy NFT_SET_EXT_TIMEOUT, 385c3e1b005SPatrick McHardy NFT_SET_EXT_EXPIRATION, 38668e942e8SPatrick McHardy NFT_SET_EXT_USERDATA, 387f25ad2e9SPatrick McHardy NFT_SET_EXT_EXPR, 3883ac4c07aSPatrick McHardy NFT_SET_EXT_NUM 3893ac4c07aSPatrick McHardy }; 3903ac4c07aSPatrick McHardy 3913ac4c07aSPatrick McHardy /** 3923ac4c07aSPatrick McHardy * struct nft_set_ext_type - set extension type 3933ac4c07aSPatrick McHardy * 3943ac4c07aSPatrick McHardy * @len: fixed part length of the extension 3953ac4c07aSPatrick McHardy * @align: alignment requirements of the extension 3963ac4c07aSPatrick McHardy */ 3973ac4c07aSPatrick McHardy struct nft_set_ext_type { 3983ac4c07aSPatrick McHardy u8 len; 3993ac4c07aSPatrick McHardy u8 align; 4003ac4c07aSPatrick McHardy }; 4013ac4c07aSPatrick McHardy 4023ac4c07aSPatrick McHardy extern const struct nft_set_ext_type nft_set_ext_types[]; 4033ac4c07aSPatrick McHardy 4043ac4c07aSPatrick McHardy /** 4053ac4c07aSPatrick McHardy * struct nft_set_ext_tmpl - set extension template 4063ac4c07aSPatrick McHardy * 4073ac4c07aSPatrick McHardy * @len: length of extension area 4083ac4c07aSPatrick McHardy * @offset: offsets of individual extension types 4093ac4c07aSPatrick McHardy */ 4103ac4c07aSPatrick McHardy struct nft_set_ext_tmpl { 4113ac4c07aSPatrick McHardy u16 len; 4123ac4c07aSPatrick McHardy u8 offset[NFT_SET_EXT_NUM]; 4133ac4c07aSPatrick McHardy }; 4143ac4c07aSPatrick McHardy 4153ac4c07aSPatrick McHardy /** 4163ac4c07aSPatrick McHardy * struct nft_set_ext - set extensions 4173ac4c07aSPatrick McHardy * 418cc02e457SPatrick McHardy * @genmask: generation mask 4193ac4c07aSPatrick McHardy * @offset: offsets of individual extension types 4203ac4c07aSPatrick McHardy * @data: beginning of extension data 4213ac4c07aSPatrick McHardy */ 4223ac4c07aSPatrick McHardy struct nft_set_ext { 423cc02e457SPatrick McHardy u8 genmask; 4243ac4c07aSPatrick McHardy u8 offset[NFT_SET_EXT_NUM]; 4253ac4c07aSPatrick McHardy char data[0]; 4263ac4c07aSPatrick McHardy }; 4273ac4c07aSPatrick McHardy 4283ac4c07aSPatrick McHardy static inline void nft_set_ext_prepare(struct nft_set_ext_tmpl *tmpl) 4293ac4c07aSPatrick McHardy { 4303ac4c07aSPatrick McHardy memset(tmpl, 0, sizeof(*tmpl)); 4313ac4c07aSPatrick McHardy tmpl->len = sizeof(struct nft_set_ext); 4323ac4c07aSPatrick McHardy } 4333ac4c07aSPatrick McHardy 4343ac4c07aSPatrick McHardy static inline void nft_set_ext_add_length(struct nft_set_ext_tmpl *tmpl, u8 id, 4353ac4c07aSPatrick McHardy unsigned int len) 4363ac4c07aSPatrick McHardy { 4373ac4c07aSPatrick McHardy tmpl->len = ALIGN(tmpl->len, nft_set_ext_types[id].align); 4383ac4c07aSPatrick McHardy BUG_ON(tmpl->len > U8_MAX); 4393ac4c07aSPatrick McHardy tmpl->offset[id] = tmpl->len; 4403ac4c07aSPatrick McHardy tmpl->len += nft_set_ext_types[id].len + len; 4413ac4c07aSPatrick McHardy } 4423ac4c07aSPatrick McHardy 4433ac4c07aSPatrick McHardy static inline void nft_set_ext_add(struct nft_set_ext_tmpl *tmpl, u8 id) 4443ac4c07aSPatrick McHardy { 4453ac4c07aSPatrick McHardy nft_set_ext_add_length(tmpl, id, 0); 4463ac4c07aSPatrick McHardy } 4473ac4c07aSPatrick McHardy 4483ac4c07aSPatrick McHardy static inline void nft_set_ext_init(struct nft_set_ext *ext, 4493ac4c07aSPatrick McHardy const struct nft_set_ext_tmpl *tmpl) 4503ac4c07aSPatrick McHardy { 4513ac4c07aSPatrick McHardy memcpy(ext->offset, tmpl->offset, sizeof(ext->offset)); 4523ac4c07aSPatrick McHardy } 4533ac4c07aSPatrick McHardy 4543ac4c07aSPatrick McHardy static inline bool __nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) 4553ac4c07aSPatrick McHardy { 4563ac4c07aSPatrick McHardy return !!ext->offset[id]; 4573ac4c07aSPatrick McHardy } 4583ac4c07aSPatrick McHardy 4593ac4c07aSPatrick McHardy static inline bool nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) 4603ac4c07aSPatrick McHardy { 4613ac4c07aSPatrick McHardy return ext && __nft_set_ext_exists(ext, id); 4623ac4c07aSPatrick McHardy } 4633ac4c07aSPatrick McHardy 4643ac4c07aSPatrick McHardy static inline void *nft_set_ext(const struct nft_set_ext *ext, u8 id) 4653ac4c07aSPatrick McHardy { 4663ac4c07aSPatrick McHardy return (void *)ext + ext->offset[id]; 4673ac4c07aSPatrick McHardy } 4683ac4c07aSPatrick McHardy 4693ac4c07aSPatrick McHardy static inline struct nft_data *nft_set_ext_key(const struct nft_set_ext *ext) 4703ac4c07aSPatrick McHardy { 4713ac4c07aSPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_KEY); 4723ac4c07aSPatrick McHardy } 4733ac4c07aSPatrick McHardy 4743ac4c07aSPatrick McHardy static inline struct nft_data *nft_set_ext_data(const struct nft_set_ext *ext) 4753ac4c07aSPatrick McHardy { 4763ac4c07aSPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_DATA); 4773ac4c07aSPatrick McHardy } 4783ac4c07aSPatrick McHardy 4793ac4c07aSPatrick McHardy static inline u8 *nft_set_ext_flags(const struct nft_set_ext *ext) 4803ac4c07aSPatrick McHardy { 4813ac4c07aSPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_FLAGS); 4823ac4c07aSPatrick McHardy } 483ef1f7df9SPatrick McHardy 484c3e1b005SPatrick McHardy static inline u64 *nft_set_ext_timeout(const struct nft_set_ext *ext) 485c3e1b005SPatrick McHardy { 486c3e1b005SPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_TIMEOUT); 487c3e1b005SPatrick McHardy } 488c3e1b005SPatrick McHardy 489c3e1b005SPatrick McHardy static inline unsigned long *nft_set_ext_expiration(const struct nft_set_ext *ext) 490c3e1b005SPatrick McHardy { 491c3e1b005SPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_EXPIRATION); 492c3e1b005SPatrick McHardy } 493c3e1b005SPatrick McHardy 49468e942e8SPatrick McHardy static inline struct nft_userdata *nft_set_ext_userdata(const struct nft_set_ext *ext) 49568e942e8SPatrick McHardy { 49668e942e8SPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_USERDATA); 49768e942e8SPatrick McHardy } 49868e942e8SPatrick McHardy 499f25ad2e9SPatrick McHardy static inline struct nft_expr *nft_set_ext_expr(const struct nft_set_ext *ext) 500f25ad2e9SPatrick McHardy { 501f25ad2e9SPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_EXPR); 502f25ad2e9SPatrick McHardy } 503f25ad2e9SPatrick McHardy 504c3e1b005SPatrick McHardy static inline bool nft_set_elem_expired(const struct nft_set_ext *ext) 505c3e1b005SPatrick McHardy { 506c3e1b005SPatrick McHardy return nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION) && 507c3e1b005SPatrick McHardy time_is_before_eq_jiffies(*nft_set_ext_expiration(ext)); 508c3e1b005SPatrick McHardy } 509c3e1b005SPatrick McHardy 510fe2811ebSPatrick McHardy static inline struct nft_set_ext *nft_set_elem_ext(const struct nft_set *set, 511fe2811ebSPatrick McHardy void *elem) 512fe2811ebSPatrick McHardy { 513fe2811ebSPatrick McHardy return elem + set->ops->elemsize; 514fe2811ebSPatrick McHardy } 515fe2811ebSPatrick McHardy 51622fe54d5SPatrick McHardy void *nft_set_elem_init(const struct nft_set *set, 51722fe54d5SPatrick McHardy const struct nft_set_ext_tmpl *tmpl, 51849499c3eSPatrick McHardy const u32 *key, const u32 *data, 51922fe54d5SPatrick McHardy u64 timeout, gfp_t gfp); 52061edafbbSPatrick McHardy void nft_set_elem_destroy(const struct nft_set *set, void *elem); 52161edafbbSPatrick McHardy 52220a69341SPatrick McHardy /** 523cfed7e1bSPatrick McHardy * struct nft_set_gc_batch_head - nf_tables set garbage collection batch 524cfed7e1bSPatrick McHardy * 525cfed7e1bSPatrick McHardy * @rcu: rcu head 526cfed7e1bSPatrick McHardy * @set: set the elements belong to 527cfed7e1bSPatrick McHardy * @cnt: count of elements 528cfed7e1bSPatrick McHardy */ 529cfed7e1bSPatrick McHardy struct nft_set_gc_batch_head { 530cfed7e1bSPatrick McHardy struct rcu_head rcu; 531cfed7e1bSPatrick McHardy const struct nft_set *set; 532cfed7e1bSPatrick McHardy unsigned int cnt; 533cfed7e1bSPatrick McHardy }; 534cfed7e1bSPatrick McHardy 535cfed7e1bSPatrick McHardy #define NFT_SET_GC_BATCH_SIZE ((PAGE_SIZE - \ 536cfed7e1bSPatrick McHardy sizeof(struct nft_set_gc_batch_head)) / \ 537cfed7e1bSPatrick McHardy sizeof(void *)) 538cfed7e1bSPatrick McHardy 539cfed7e1bSPatrick McHardy /** 540cfed7e1bSPatrick McHardy * struct nft_set_gc_batch - nf_tables set garbage collection batch 541cfed7e1bSPatrick McHardy * 542cfed7e1bSPatrick McHardy * @head: GC batch head 543cfed7e1bSPatrick McHardy * @elems: garbage collection elements 544cfed7e1bSPatrick McHardy */ 545cfed7e1bSPatrick McHardy struct nft_set_gc_batch { 546cfed7e1bSPatrick McHardy struct nft_set_gc_batch_head head; 547cfed7e1bSPatrick McHardy void *elems[NFT_SET_GC_BATCH_SIZE]; 548cfed7e1bSPatrick McHardy }; 549cfed7e1bSPatrick McHardy 550cfed7e1bSPatrick McHardy struct nft_set_gc_batch *nft_set_gc_batch_alloc(const struct nft_set *set, 551cfed7e1bSPatrick McHardy gfp_t gfp); 552cfed7e1bSPatrick McHardy void nft_set_gc_batch_release(struct rcu_head *rcu); 553cfed7e1bSPatrick McHardy 554cfed7e1bSPatrick McHardy static inline void nft_set_gc_batch_complete(struct nft_set_gc_batch *gcb) 555cfed7e1bSPatrick McHardy { 556cfed7e1bSPatrick McHardy if (gcb != NULL) 557cfed7e1bSPatrick McHardy call_rcu(&gcb->head.rcu, nft_set_gc_batch_release); 558cfed7e1bSPatrick McHardy } 559cfed7e1bSPatrick McHardy 560cfed7e1bSPatrick McHardy static inline struct nft_set_gc_batch * 561cfed7e1bSPatrick McHardy nft_set_gc_batch_check(const struct nft_set *set, struct nft_set_gc_batch *gcb, 562cfed7e1bSPatrick McHardy gfp_t gfp) 563cfed7e1bSPatrick McHardy { 564cfed7e1bSPatrick McHardy if (gcb != NULL) { 565cfed7e1bSPatrick McHardy if (gcb->head.cnt + 1 < ARRAY_SIZE(gcb->elems)) 566cfed7e1bSPatrick McHardy return gcb; 567cfed7e1bSPatrick McHardy nft_set_gc_batch_complete(gcb); 568cfed7e1bSPatrick McHardy } 569cfed7e1bSPatrick McHardy return nft_set_gc_batch_alloc(set, gfp); 570cfed7e1bSPatrick McHardy } 571cfed7e1bSPatrick McHardy 572cfed7e1bSPatrick McHardy static inline void nft_set_gc_batch_add(struct nft_set_gc_batch *gcb, 573cfed7e1bSPatrick McHardy void *elem) 574cfed7e1bSPatrick McHardy { 575cfed7e1bSPatrick McHardy gcb->elems[gcb->head.cnt++] = elem; 576cfed7e1bSPatrick McHardy } 577cfed7e1bSPatrick McHardy 578cfed7e1bSPatrick McHardy /** 579ef1f7df9SPatrick McHardy * struct nft_expr_type - nf_tables expression type 58096518518SPatrick McHardy * 581ef1f7df9SPatrick McHardy * @select_ops: function to select nft_expr_ops 582ef1f7df9SPatrick McHardy * @ops: default ops, used when no select_ops functions is present 58396518518SPatrick McHardy * @list: used internally 58496518518SPatrick McHardy * @name: Identifier 58596518518SPatrick McHardy * @owner: module reference 58696518518SPatrick McHardy * @policy: netlink attribute policy 58796518518SPatrick McHardy * @maxattr: highest netlink attribute number 58864d46806SPatrick McHardy * @family: address family for AF-specific types 589151d799aSPatrick McHardy * @flags: expression type flags 590ef1f7df9SPatrick McHardy */ 591ef1f7df9SPatrick McHardy struct nft_expr_type { 5920ca743a5SPablo Neira Ayuso const struct nft_expr_ops *(*select_ops)(const struct nft_ctx *, 5930ca743a5SPablo Neira Ayuso const struct nlattr * const tb[]); 594ef1f7df9SPatrick McHardy const struct nft_expr_ops *ops; 595ef1f7df9SPatrick McHardy struct list_head list; 596ef1f7df9SPatrick McHardy const char *name; 597ef1f7df9SPatrick McHardy struct module *owner; 598ef1f7df9SPatrick McHardy const struct nla_policy *policy; 599ef1f7df9SPatrick McHardy unsigned int maxattr; 60064d46806SPatrick McHardy u8 family; 601151d799aSPatrick McHardy u8 flags; 602ef1f7df9SPatrick McHardy }; 603ef1f7df9SPatrick McHardy 604151d799aSPatrick McHardy #define NFT_EXPR_STATEFUL 0x1 605151d799aSPatrick McHardy 606ef1f7df9SPatrick McHardy /** 607ef1f7df9SPatrick McHardy * struct nft_expr_ops - nf_tables expression operations 608ef1f7df9SPatrick McHardy * 609ef1f7df9SPatrick McHardy * @eval: Expression evaluation function 61096518518SPatrick McHardy * @size: full expression size, including private data size 611ef1f7df9SPatrick McHardy * @init: initialization function 612ef1f7df9SPatrick McHardy * @destroy: destruction function 613ef1f7df9SPatrick McHardy * @dump: function to dump parameters 614ef1f7df9SPatrick McHardy * @type: expression type 6150ca743a5SPablo Neira Ayuso * @validate: validate expression, called during loop detection 6160ca743a5SPablo Neira Ayuso * @data: extra data to attach to this expression operation 61796518518SPatrick McHardy */ 61896518518SPatrick McHardy struct nft_expr; 61996518518SPatrick McHardy struct nft_expr_ops { 62096518518SPatrick McHardy void (*eval)(const struct nft_expr *expr, 621a55e22e9SPatrick McHardy struct nft_regs *regs, 62296518518SPatrick McHardy const struct nft_pktinfo *pkt); 623086f3321SPablo Neira Ayuso int (*clone)(struct nft_expr *dst, 624086f3321SPablo Neira Ayuso const struct nft_expr *src); 625ef1f7df9SPatrick McHardy unsigned int size; 626ef1f7df9SPatrick McHardy 62796518518SPatrick McHardy int (*init)(const struct nft_ctx *ctx, 62896518518SPatrick McHardy const struct nft_expr *expr, 62996518518SPatrick McHardy const struct nlattr * const tb[]); 63062472bceSPatrick McHardy void (*destroy)(const struct nft_ctx *ctx, 63162472bceSPatrick McHardy const struct nft_expr *expr); 63296518518SPatrick McHardy int (*dump)(struct sk_buff *skb, 63396518518SPatrick McHardy const struct nft_expr *expr); 6340ca743a5SPablo Neira Ayuso int (*validate)(const struct nft_ctx *ctx, 6350ca743a5SPablo Neira Ayuso const struct nft_expr *expr, 6360ca743a5SPablo Neira Ayuso const struct nft_data **data); 637ef1f7df9SPatrick McHardy const struct nft_expr_type *type; 6380ca743a5SPablo Neira Ayuso void *data; 63996518518SPatrick McHardy }; 64096518518SPatrick McHardy 641ef1f7df9SPatrick McHardy #define NFT_EXPR_MAXATTR 16 64296518518SPatrick McHardy #define NFT_EXPR_SIZE(size) (sizeof(struct nft_expr) + \ 64396518518SPatrick McHardy ALIGN(size, __alignof__(struct nft_expr))) 64496518518SPatrick McHardy 64596518518SPatrick McHardy /** 64696518518SPatrick McHardy * struct nft_expr - nf_tables expression 64796518518SPatrick McHardy * 64896518518SPatrick McHardy * @ops: expression ops 64996518518SPatrick McHardy * @data: expression private data 65096518518SPatrick McHardy */ 65196518518SPatrick McHardy struct nft_expr { 65296518518SPatrick McHardy const struct nft_expr_ops *ops; 65396518518SPatrick McHardy unsigned char data[]; 65496518518SPatrick McHardy }; 65596518518SPatrick McHardy 65696518518SPatrick McHardy static inline void *nft_expr_priv(const struct nft_expr *expr) 65796518518SPatrick McHardy { 65896518518SPatrick McHardy return (void *)expr->data; 65996518518SPatrick McHardy } 66096518518SPatrick McHardy 6610b2d8a7bSPatrick McHardy struct nft_expr *nft_expr_init(const struct nft_ctx *ctx, 6620b2d8a7bSPatrick McHardy const struct nlattr *nla); 6630b2d8a7bSPatrick McHardy void nft_expr_destroy(const struct nft_ctx *ctx, struct nft_expr *expr); 6640b2d8a7bSPatrick McHardy int nft_expr_dump(struct sk_buff *skb, unsigned int attr, 6650b2d8a7bSPatrick McHardy const struct nft_expr *expr); 6660b2d8a7bSPatrick McHardy 667086f3321SPablo Neira Ayuso static inline int nft_expr_clone(struct nft_expr *dst, struct nft_expr *src) 6680b2d8a7bSPatrick McHardy { 669086f3321SPablo Neira Ayuso int err; 670086f3321SPablo Neira Ayuso 6710b2d8a7bSPatrick McHardy __module_get(src->ops->type->owner); 672086f3321SPablo Neira Ayuso if (src->ops->clone) { 673086f3321SPablo Neira Ayuso dst->ops = src->ops; 674086f3321SPablo Neira Ayuso err = src->ops->clone(dst, src); 675086f3321SPablo Neira Ayuso if (err < 0) 676086f3321SPablo Neira Ayuso return err; 677086f3321SPablo Neira Ayuso } else { 6780b2d8a7bSPatrick McHardy memcpy(dst, src, src->ops->size); 6790b2d8a7bSPatrick McHardy } 680086f3321SPablo Neira Ayuso return 0; 681086f3321SPablo Neira Ayuso } 6820b2d8a7bSPatrick McHardy 68396518518SPatrick McHardy /** 68496518518SPatrick McHardy * struct nft_rule - nf_tables rule 68596518518SPatrick McHardy * 68696518518SPatrick McHardy * @list: used internally 68796518518SPatrick McHardy * @handle: rule handle 6880628b123SPablo Neira Ayuso * @genmask: generation mask 68996518518SPatrick McHardy * @dlen: length of expression data 69086f1ec32SPatrick McHardy * @udata: user data is appended to the rule 69196518518SPatrick McHardy * @data: expression data 69296518518SPatrick McHardy */ 69396518518SPatrick McHardy struct nft_rule { 69496518518SPatrick McHardy struct list_head list; 6950768b3b3SPablo Neira Ayuso u64 handle:42, 6960628b123SPablo Neira Ayuso genmask:2, 6970768b3b3SPablo Neira Ayuso dlen:12, 69886f1ec32SPatrick McHardy udata:1; 69996518518SPatrick McHardy unsigned char data[] 70096518518SPatrick McHardy __attribute__((aligned(__alignof__(struct nft_expr)))); 70196518518SPatrick McHardy }; 70296518518SPatrick McHardy 70396518518SPatrick McHardy static inline struct nft_expr *nft_expr_first(const struct nft_rule *rule) 70496518518SPatrick McHardy { 70596518518SPatrick McHardy return (struct nft_expr *)&rule->data[0]; 70696518518SPatrick McHardy } 70796518518SPatrick McHardy 70896518518SPatrick McHardy static inline struct nft_expr *nft_expr_next(const struct nft_expr *expr) 70996518518SPatrick McHardy { 71096518518SPatrick McHardy return ((void *)expr) + expr->ops->size; 71196518518SPatrick McHardy } 71296518518SPatrick McHardy 71396518518SPatrick McHardy static inline struct nft_expr *nft_expr_last(const struct nft_rule *rule) 71496518518SPatrick McHardy { 71596518518SPatrick McHardy return (struct nft_expr *)&rule->data[rule->dlen]; 71696518518SPatrick McHardy } 71796518518SPatrick McHardy 71886f1ec32SPatrick McHardy static inline struct nft_userdata *nft_userdata(const struct nft_rule *rule) 7190768b3b3SPablo Neira Ayuso { 7200768b3b3SPablo Neira Ayuso return (void *)&rule->data[rule->dlen]; 7210768b3b3SPablo Neira Ayuso } 7220768b3b3SPablo Neira Ayuso 72396518518SPatrick McHardy /* 72496518518SPatrick McHardy * The last pointer isn't really necessary, but the compiler isn't able to 72596518518SPatrick McHardy * determine that the result of nft_expr_last() is always the same since it 72696518518SPatrick McHardy * can't assume that the dlen value wasn't changed within calls in the loop. 72796518518SPatrick McHardy */ 72896518518SPatrick McHardy #define nft_rule_for_each_expr(expr, last, rule) \ 72996518518SPatrick McHardy for ((expr) = nft_expr_first(rule), (last) = nft_expr_last(rule); \ 73096518518SPatrick McHardy (expr) != (last); \ 73196518518SPatrick McHardy (expr) = nft_expr_next(expr)) 73296518518SPatrick McHardy 73396518518SPatrick McHardy enum nft_chain_flags { 73496518518SPatrick McHardy NFT_BASE_CHAIN = 0x1, 73591c7b38dSPablo Neira Ayuso NFT_CHAIN_INACTIVE = 0x2, 73696518518SPatrick McHardy }; 73796518518SPatrick McHardy 73896518518SPatrick McHardy /** 73996518518SPatrick McHardy * struct nft_chain - nf_tables chain 74096518518SPatrick McHardy * 74196518518SPatrick McHardy * @rules: list of rules in the chain 74296518518SPatrick McHardy * @list: used internally 743b5bc89bfSPablo Neira Ayuso * @table: table that this chain belongs to 74496518518SPatrick McHardy * @handle: chain handle 74596518518SPatrick McHardy * @use: number of jump references to this chain 74696518518SPatrick McHardy * @level: length of longest path to this chain 747a0a7379eSPablo Neira Ayuso * @flags: bitmask of enum nft_chain_flags 74896518518SPatrick McHardy * @name: name of the chain 74996518518SPatrick McHardy */ 75096518518SPatrick McHardy struct nft_chain { 75196518518SPatrick McHardy struct list_head rules; 75296518518SPatrick McHardy struct list_head list; 753b5bc89bfSPablo Neira Ayuso struct nft_table *table; 75496518518SPatrick McHardy u64 handle; 755a0a7379eSPablo Neira Ayuso u32 use; 75696518518SPatrick McHardy u16 level; 757a0a7379eSPablo Neira Ayuso u8 flags; 75896518518SPatrick McHardy char name[NFT_CHAIN_MAXNAMELEN]; 75996518518SPatrick McHardy }; 76096518518SPatrick McHardy 7619370761cSPablo Neira Ayuso enum nft_chain_type { 7629370761cSPablo Neira Ayuso NFT_CHAIN_T_DEFAULT = 0, 7639370761cSPablo Neira Ayuso NFT_CHAIN_T_ROUTE, 7649370761cSPablo Neira Ayuso NFT_CHAIN_T_NAT, 7659370761cSPablo Neira Ayuso NFT_CHAIN_T_MAX 7669370761cSPablo Neira Ayuso }; 7679370761cSPablo Neira Ayuso 7681a1e1a12SPatrick McHardy /** 7691a1e1a12SPatrick McHardy * struct nf_chain_type - nf_tables chain type info 7701a1e1a12SPatrick McHardy * 7711a1e1a12SPatrick McHardy * @name: name of the type 7721a1e1a12SPatrick McHardy * @type: numeric identifier 7731a1e1a12SPatrick McHardy * @family: address family 7741a1e1a12SPatrick McHardy * @owner: module owner 7751a1e1a12SPatrick McHardy * @hook_mask: mask of valid hooks 7761a1e1a12SPatrick McHardy * @hooks: hookfn overrides 7771a1e1a12SPatrick McHardy */ 7781a1e1a12SPatrick McHardy struct nf_chain_type { 7791a1e1a12SPatrick McHardy const char *name; 7801a1e1a12SPatrick McHardy enum nft_chain_type type; 7811a1e1a12SPatrick McHardy int family; 7821a1e1a12SPatrick McHardy struct module *owner; 7831a1e1a12SPatrick McHardy unsigned int hook_mask; 7841a1e1a12SPatrick McHardy nf_hookfn *hooks[NF_MAX_HOOKS]; 7851a1e1a12SPatrick McHardy }; 7861a1e1a12SPatrick McHardy 7877210e4e3SPablo Neira Ayuso int nft_chain_validate_dependency(const struct nft_chain *chain, 7887210e4e3SPablo Neira Ayuso enum nft_chain_type type); 78975e8d06dSPablo Neira Ayuso int nft_chain_validate_hooks(const struct nft_chain *chain, 79075e8d06dSPablo Neira Ayuso unsigned int hook_flags); 7917210e4e3SPablo Neira Ayuso 7920ca743a5SPablo Neira Ayuso struct nft_stats { 7930ca743a5SPablo Neira Ayuso u64 bytes; 7940ca743a5SPablo Neira Ayuso u64 pkts; 795ce355e20SEric Dumazet struct u64_stats_sync syncp; 7960ca743a5SPablo Neira Ayuso }; 7970ca743a5SPablo Neira Ayuso 798115a60b1SPatrick McHardy #define NFT_HOOK_OPS_MAX 2 799835b8033SPablo Neira Ayuso #define NFT_BASECHAIN_DISABLED (1 << 0) 800115a60b1SPatrick McHardy 80196518518SPatrick McHardy /** 80296518518SPatrick McHardy * struct nft_base_chain - nf_tables base chain 80396518518SPatrick McHardy * 80496518518SPatrick McHardy * @ops: netfilter hook ops 8055ebb335dSPatrick McHardy * @pnet: net namespace that this chain belongs to 8069370761cSPablo Neira Ayuso * @type: chain type 8070ca743a5SPablo Neira Ayuso * @policy: default policy 8080ca743a5SPablo Neira Ayuso * @stats: per-cpu chain stats 80996518518SPatrick McHardy * @chain: the chain 8102cbce139SPablo Neira Ayuso * @dev_name: device name that this base chain is attached to (if any) 81196518518SPatrick McHardy */ 81296518518SPatrick McHardy struct nft_base_chain { 813115a60b1SPatrick McHardy struct nf_hook_ops ops[NFT_HOOK_OPS_MAX]; 8145ebb335dSPatrick McHardy possible_net_t pnet; 8152a37d755SPatrick McHardy const struct nf_chain_type *type; 8160ca743a5SPablo Neira Ayuso u8 policy; 817835b8033SPablo Neira Ayuso u8 flags; 8180ca743a5SPablo Neira Ayuso struct nft_stats __percpu *stats; 81996518518SPatrick McHardy struct nft_chain chain; 8202cbce139SPablo Neira Ayuso char dev_name[IFNAMSIZ]; 82196518518SPatrick McHardy }; 82296518518SPatrick McHardy 82396518518SPatrick McHardy static inline struct nft_base_chain *nft_base_chain(const struct nft_chain *chain) 82496518518SPatrick McHardy { 82596518518SPatrick McHardy return container_of(chain, struct nft_base_chain, chain); 82696518518SPatrick McHardy } 82796518518SPatrick McHardy 8285ebe0b0eSPablo Neira Ayuso int __nft_release_basechain(struct nft_ctx *ctx); 829835b8033SPablo Neira Ayuso 83006198b34SEric W. Biederman unsigned int nft_do_chain(struct nft_pktinfo *pkt, void *priv); 83196518518SPatrick McHardy 83296518518SPatrick McHardy /** 83396518518SPatrick McHardy * struct nft_table - nf_tables table 83496518518SPatrick McHardy * 83596518518SPatrick McHardy * @list: used internally 83696518518SPatrick McHardy * @chains: chains in the table 83796518518SPatrick McHardy * @sets: sets in the table 83896518518SPatrick McHardy * @hgenerator: handle generator state 83996518518SPatrick McHardy * @use: number of chain references to this table 84096518518SPatrick McHardy * @flags: table flag (see enum nft_table_flags) 84196518518SPatrick McHardy * @name: name of the table 84296518518SPatrick McHardy */ 84396518518SPatrick McHardy struct nft_table { 84496518518SPatrick McHardy struct list_head list; 84596518518SPatrick McHardy struct list_head chains; 84696518518SPatrick McHardy struct list_head sets; 84796518518SPatrick McHardy u64 hgenerator; 84896518518SPatrick McHardy u32 use; 84996518518SPatrick McHardy u16 flags; 8501cae565eSPablo Neira Ayuso char name[NFT_TABLE_MAXNAMELEN]; 851ebddf1a8SPablo Neira Ayuso }; 852ebddf1a8SPablo Neira Ayuso 853ebddf1a8SPablo Neira Ayuso enum nft_af_flags { 854ebddf1a8SPablo Neira Ayuso NFT_AF_NEEDS_DEV = (1 << 0), 85596518518SPatrick McHardy }; 85696518518SPatrick McHardy 85796518518SPatrick McHardy /** 85896518518SPatrick McHardy * struct nft_af_info - nf_tables address family info 85996518518SPatrick McHardy * 86096518518SPatrick McHardy * @list: used internally 86196518518SPatrick McHardy * @family: address family 86296518518SPatrick McHardy * @nhooks: number of hooks in this family 86396518518SPatrick McHardy * @owner: module owner 86496518518SPatrick McHardy * @tables: used internally 865ebddf1a8SPablo Neira Ayuso * @flags: family flags 866115a60b1SPatrick McHardy * @nops: number of hook ops in this family 867115a60b1SPatrick McHardy * @hook_ops_init: initialization function for chain hook ops 86896518518SPatrick McHardy * @hooks: hookfn overrides for packet validation 86996518518SPatrick McHardy */ 87096518518SPatrick McHardy struct nft_af_info { 87196518518SPatrick McHardy struct list_head list; 87296518518SPatrick McHardy int family; 87396518518SPatrick McHardy unsigned int nhooks; 87496518518SPatrick McHardy struct module *owner; 87596518518SPatrick McHardy struct list_head tables; 876ebddf1a8SPablo Neira Ayuso u32 flags; 877115a60b1SPatrick McHardy unsigned int nops; 878115a60b1SPatrick McHardy void (*hook_ops_init)(struct nf_hook_ops *, 879115a60b1SPatrick McHardy unsigned int); 88096518518SPatrick McHardy nf_hookfn *hooks[NF_MAX_HOOKS]; 88196518518SPatrick McHardy }; 88296518518SPatrick McHardy 8835eccdfaaSJoe Perches int nft_register_afinfo(struct net *, struct nft_af_info *); 884df05ef87SPablo Neira Ayuso void nft_unregister_afinfo(struct net *, struct nft_af_info *); 88596518518SPatrick McHardy 8862a37d755SPatrick McHardy int nft_register_chain_type(const struct nf_chain_type *); 8872a37d755SPatrick McHardy void nft_unregister_chain_type(const struct nf_chain_type *); 88896518518SPatrick McHardy 8895eccdfaaSJoe Perches int nft_register_expr(struct nft_expr_type *); 8905eccdfaaSJoe Perches void nft_unregister_expr(struct nft_expr_type *); 89196518518SPatrick McHardy 89233d5a7b1SFlorian Westphal int nft_verdict_dump(struct sk_buff *skb, int type, 89333d5a7b1SFlorian Westphal const struct nft_verdict *v); 89433d5a7b1SFlorian Westphal 89533d5a7b1SFlorian Westphal /** 89633d5a7b1SFlorian Westphal * struct nft_traceinfo - nft tracing information and state 89733d5a7b1SFlorian Westphal * 89833d5a7b1SFlorian Westphal * @pkt: pktinfo currently processed 89933d5a7b1SFlorian Westphal * @basechain: base chain currently processed 90033d5a7b1SFlorian Westphal * @chain: chain currently processed 90133d5a7b1SFlorian Westphal * @rule: rule that was evaluated 90233d5a7b1SFlorian Westphal * @verdict: verdict given by rule 90333d5a7b1SFlorian Westphal * @type: event type (enum nft_trace_types) 90433d5a7b1SFlorian Westphal * @packet_dumped: packet headers sent in a previous traceinfo message 90533d5a7b1SFlorian Westphal * @trace: other struct members are initialised 90633d5a7b1SFlorian Westphal */ 90733d5a7b1SFlorian Westphal struct nft_traceinfo { 90833d5a7b1SFlorian Westphal const struct nft_pktinfo *pkt; 90933d5a7b1SFlorian Westphal const struct nft_base_chain *basechain; 91033d5a7b1SFlorian Westphal const struct nft_chain *chain; 91133d5a7b1SFlorian Westphal const struct nft_rule *rule; 91233d5a7b1SFlorian Westphal const struct nft_verdict *verdict; 91333d5a7b1SFlorian Westphal enum nft_trace_types type; 91433d5a7b1SFlorian Westphal bool packet_dumped; 91533d5a7b1SFlorian Westphal bool trace; 91633d5a7b1SFlorian Westphal }; 91733d5a7b1SFlorian Westphal 91833d5a7b1SFlorian Westphal void nft_trace_init(struct nft_traceinfo *info, const struct nft_pktinfo *pkt, 91933d5a7b1SFlorian Westphal const struct nft_verdict *verdict, 92033d5a7b1SFlorian Westphal const struct nft_chain *basechain); 92133d5a7b1SFlorian Westphal 92233d5a7b1SFlorian Westphal void nft_trace_notify(struct nft_traceinfo *info); 92333d5a7b1SFlorian Westphal 92467a8fc27SPatrick McHardy #define nft_dereference(p) \ 92567a8fc27SPatrick McHardy nfnl_dereference(p, NFNL_SUBSYS_NFTABLES) 92667a8fc27SPatrick McHardy 92796518518SPatrick McHardy #define MODULE_ALIAS_NFT_FAMILY(family) \ 92896518518SPatrick McHardy MODULE_ALIAS("nft-afinfo-" __stringify(family)) 92996518518SPatrick McHardy 9309370761cSPablo Neira Ayuso #define MODULE_ALIAS_NFT_CHAIN(family, name) \ 9319370761cSPablo Neira Ayuso MODULE_ALIAS("nft-chain-" __stringify(family) "-" name) 93296518518SPatrick McHardy 93364d46806SPatrick McHardy #define MODULE_ALIAS_NFT_AF_EXPR(family, name) \ 93464d46806SPatrick McHardy MODULE_ALIAS("nft-expr-" __stringify(family) "-" name) 93564d46806SPatrick McHardy 93696518518SPatrick McHardy #define MODULE_ALIAS_NFT_EXPR(name) \ 93796518518SPatrick McHardy MODULE_ALIAS("nft-expr-" name) 93896518518SPatrick McHardy 93920a69341SPatrick McHardy #define MODULE_ALIAS_NFT_SET() \ 94020a69341SPatrick McHardy MODULE_ALIAS("nft-set") 94120a69341SPatrick McHardy 942ea4bd995SPatrick McHardy /* 943ea4bd995SPatrick McHardy * The gencursor defines two generations, the currently active and the 944ea4bd995SPatrick McHardy * next one. Objects contain a bitmask of 2 bits specifying the generations 945ea4bd995SPatrick McHardy * they're active in. A set bit means they're inactive in the generation 946ea4bd995SPatrick McHardy * represented by that bit. 947ea4bd995SPatrick McHardy * 948ea4bd995SPatrick McHardy * New objects start out as inactive in the current and active in the 949ea4bd995SPatrick McHardy * next generation. When committing the ruleset the bitmask is cleared, 950ea4bd995SPatrick McHardy * meaning they're active in all generations. When removing an object, 951ea4bd995SPatrick McHardy * it is set inactive in the next generation. After committing the ruleset, 952ea4bd995SPatrick McHardy * the objects are removed. 953ea4bd995SPatrick McHardy */ 954ea4bd995SPatrick McHardy static inline unsigned int nft_gencursor_next(const struct net *net) 955ea4bd995SPatrick McHardy { 956ea4bd995SPatrick McHardy return net->nft.gencursor + 1 == 1 ? 1 : 0; 957ea4bd995SPatrick McHardy } 958ea4bd995SPatrick McHardy 959ea4bd995SPatrick McHardy static inline u8 nft_genmask_next(const struct net *net) 960ea4bd995SPatrick McHardy { 961ea4bd995SPatrick McHardy return 1 << nft_gencursor_next(net); 962ea4bd995SPatrick McHardy } 963ea4bd995SPatrick McHardy 964ea4bd995SPatrick McHardy static inline u8 nft_genmask_cur(const struct net *net) 965ea4bd995SPatrick McHardy { 966ea4bd995SPatrick McHardy /* Use ACCESS_ONCE() to prevent refetching the value for atomicity */ 967ea4bd995SPatrick McHardy return 1 << ACCESS_ONCE(net->nft.gencursor); 968ea4bd995SPatrick McHardy } 969ea4bd995SPatrick McHardy 97022fe54d5SPatrick McHardy #define NFT_GENMASK_ANY ((1 << 0) | (1 << 1)) 97122fe54d5SPatrick McHardy 972cc02e457SPatrick McHardy /* 973cc02e457SPatrick McHardy * Set element transaction helpers 974cc02e457SPatrick McHardy */ 975cc02e457SPatrick McHardy 976cc02e457SPatrick McHardy static inline bool nft_set_elem_active(const struct nft_set_ext *ext, 977cc02e457SPatrick McHardy u8 genmask) 978cc02e457SPatrick McHardy { 979cc02e457SPatrick McHardy return !(ext->genmask & genmask); 980cc02e457SPatrick McHardy } 981cc02e457SPatrick McHardy 982cc02e457SPatrick McHardy static inline void nft_set_elem_change_active(const struct nft_set *set, 983cc02e457SPatrick McHardy struct nft_set_ext *ext) 984cc02e457SPatrick McHardy { 985cc02e457SPatrick McHardy ext->genmask ^= nft_genmask_next(read_pnet(&set->pnet)); 986cc02e457SPatrick McHardy } 987cc02e457SPatrick McHardy 98869086658SPatrick McHardy /* 98969086658SPatrick McHardy * We use a free bit in the genmask field to indicate the element 99069086658SPatrick McHardy * is busy, meaning it is currently being processed either by 99169086658SPatrick McHardy * the netlink API or GC. 99269086658SPatrick McHardy * 99369086658SPatrick McHardy * Even though the genmask is only a single byte wide, this works 99469086658SPatrick McHardy * because the extension structure if fully constant once initialized, 99569086658SPatrick McHardy * so there are no non-atomic write accesses unless it is already 99669086658SPatrick McHardy * marked busy. 99769086658SPatrick McHardy */ 99869086658SPatrick McHardy #define NFT_SET_ELEM_BUSY_MASK (1 << 2) 99969086658SPatrick McHardy 100069086658SPatrick McHardy #if defined(__LITTLE_ENDIAN_BITFIELD) 100169086658SPatrick McHardy #define NFT_SET_ELEM_BUSY_BIT 2 100269086658SPatrick McHardy #elif defined(__BIG_ENDIAN_BITFIELD) 100369086658SPatrick McHardy #define NFT_SET_ELEM_BUSY_BIT (BITS_PER_LONG - BITS_PER_BYTE + 2) 100469086658SPatrick McHardy #else 100569086658SPatrick McHardy #error 100669086658SPatrick McHardy #endif 100769086658SPatrick McHardy 100869086658SPatrick McHardy static inline int nft_set_elem_mark_busy(struct nft_set_ext *ext) 100969086658SPatrick McHardy { 101069086658SPatrick McHardy unsigned long *word = (unsigned long *)ext; 101169086658SPatrick McHardy 101269086658SPatrick McHardy BUILD_BUG_ON(offsetof(struct nft_set_ext, genmask) != 0); 101369086658SPatrick McHardy return test_and_set_bit(NFT_SET_ELEM_BUSY_BIT, word); 101469086658SPatrick McHardy } 101569086658SPatrick McHardy 101669086658SPatrick McHardy static inline void nft_set_elem_clear_busy(struct nft_set_ext *ext) 101769086658SPatrick McHardy { 101869086658SPatrick McHardy unsigned long *word = (unsigned long *)ext; 101969086658SPatrick McHardy 102069086658SPatrick McHardy clear_bit(NFT_SET_ELEM_BUSY_BIT, word); 102169086658SPatrick McHardy } 102269086658SPatrick McHardy 10231a1e1a12SPatrick McHardy /** 10241a1e1a12SPatrick McHardy * struct nft_trans - nf_tables object update in transaction 10251a1e1a12SPatrick McHardy * 10261a1e1a12SPatrick McHardy * @list: used internally 10271a1e1a12SPatrick McHardy * @msg_type: message type 10281a1e1a12SPatrick McHardy * @ctx: transaction context 10291a1e1a12SPatrick McHardy * @data: internal information related to the transaction 10301a1e1a12SPatrick McHardy */ 10311a1e1a12SPatrick McHardy struct nft_trans { 10321a1e1a12SPatrick McHardy struct list_head list; 10331a1e1a12SPatrick McHardy int msg_type; 10341a1e1a12SPatrick McHardy struct nft_ctx ctx; 10351a1e1a12SPatrick McHardy char data[0]; 10361a1e1a12SPatrick McHardy }; 10371a1e1a12SPatrick McHardy 10381a1e1a12SPatrick McHardy struct nft_trans_rule { 10391a1e1a12SPatrick McHardy struct nft_rule *rule; 10401a1e1a12SPatrick McHardy }; 10411a1e1a12SPatrick McHardy 10421a1e1a12SPatrick McHardy #define nft_trans_rule(trans) \ 10431a1e1a12SPatrick McHardy (((struct nft_trans_rule *)trans->data)->rule) 10441a1e1a12SPatrick McHardy 10451a1e1a12SPatrick McHardy struct nft_trans_set { 10461a1e1a12SPatrick McHardy struct nft_set *set; 10471a1e1a12SPatrick McHardy u32 set_id; 10481a1e1a12SPatrick McHardy }; 10491a1e1a12SPatrick McHardy 10501a1e1a12SPatrick McHardy #define nft_trans_set(trans) \ 10511a1e1a12SPatrick McHardy (((struct nft_trans_set *)trans->data)->set) 10521a1e1a12SPatrick McHardy #define nft_trans_set_id(trans) \ 10531a1e1a12SPatrick McHardy (((struct nft_trans_set *)trans->data)->set_id) 10541a1e1a12SPatrick McHardy 10551a1e1a12SPatrick McHardy struct nft_trans_chain { 10561a1e1a12SPatrick McHardy bool update; 10571a1e1a12SPatrick McHardy char name[NFT_CHAIN_MAXNAMELEN]; 10581a1e1a12SPatrick McHardy struct nft_stats __percpu *stats; 10591a1e1a12SPatrick McHardy u8 policy; 10601a1e1a12SPatrick McHardy }; 10611a1e1a12SPatrick McHardy 10621a1e1a12SPatrick McHardy #define nft_trans_chain_update(trans) \ 10631a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->update) 10641a1e1a12SPatrick McHardy #define nft_trans_chain_name(trans) \ 10651a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->name) 10661a1e1a12SPatrick McHardy #define nft_trans_chain_stats(trans) \ 10671a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->stats) 10681a1e1a12SPatrick McHardy #define nft_trans_chain_policy(trans) \ 10691a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->policy) 10701a1e1a12SPatrick McHardy 10711a1e1a12SPatrick McHardy struct nft_trans_table { 10721a1e1a12SPatrick McHardy bool update; 10731a1e1a12SPatrick McHardy bool enable; 10741a1e1a12SPatrick McHardy }; 10751a1e1a12SPatrick McHardy 10761a1e1a12SPatrick McHardy #define nft_trans_table_update(trans) \ 10771a1e1a12SPatrick McHardy (((struct nft_trans_table *)trans->data)->update) 10781a1e1a12SPatrick McHardy #define nft_trans_table_enable(trans) \ 10791a1e1a12SPatrick McHardy (((struct nft_trans_table *)trans->data)->enable) 10801a1e1a12SPatrick McHardy 10811a1e1a12SPatrick McHardy struct nft_trans_elem { 10821a1e1a12SPatrick McHardy struct nft_set *set; 10831a1e1a12SPatrick McHardy struct nft_set_elem elem; 10841a1e1a12SPatrick McHardy }; 10851a1e1a12SPatrick McHardy 10861a1e1a12SPatrick McHardy #define nft_trans_elem_set(trans) \ 10871a1e1a12SPatrick McHardy (((struct nft_trans_elem *)trans->data)->set) 10881a1e1a12SPatrick McHardy #define nft_trans_elem(trans) \ 10891a1e1a12SPatrick McHardy (((struct nft_trans_elem *)trans->data)->elem) 10901a1e1a12SPatrick McHardy 109196518518SPatrick McHardy #endif /* _NET_NF_TABLES_H */ 1092