| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef _NET_NF_TABLES_H |
| #define _NET_NF_TABLES_H |
| |
| #include <asm/unaligned.h> |
| #include <linux/list.h> |
| #include <linux/netfilter.h> |
| #include <linux/netfilter/nfnetlink.h> |
| #include <linux/netfilter/x_tables.h> |
| #include <linux/netfilter/nf_tables.h> |
| #include <linux/u64_stats_sync.h> |
| #include <linux/rhashtable.h> |
| #include <net/netfilter/nf_flow_table.h> |
| #include <net/netlink.h> |
| #include <net/flow_offload.h> |
| #include <net/netns/generic.h> |
| |
| #define NFT_MAX_HOOKS (NF_INET_INGRESS + 1) |
| |
| struct module; |
| |
| #define NFT_JUMP_STACK_SIZE 16 |
| |
| enum { |
| NFT_PKTINFO_L4PROTO = (1 << 0), |
| NFT_PKTINFO_INNER = (1 << 1), |
| }; |
| |
| struct nft_pktinfo { |
| struct sk_buff *skb; |
| const struct nf_hook_state *state; |
| u8 flags; |
| u8 tprot; |
| u16 fragoff; |
| unsigned int thoff; |
| unsigned int inneroff; |
| }; |
| |
| static inline struct sock *nft_sk(const struct nft_pktinfo *pkt) |
| { |
| return pkt->state->sk; |
| } |
| |
| static inline unsigned int nft_thoff(const struct nft_pktinfo *pkt) |
| { |
| return pkt->thoff; |
| } |
| |
| static inline struct net *nft_net(const struct nft_pktinfo *pkt) |
| { |
| return pkt->state->net; |
| } |
| |
| static inline unsigned int nft_hook(const struct nft_pktinfo *pkt) |
| { |
| return pkt->state->hook; |
| } |
| |
| static inline u8 nft_pf(const struct nft_pktinfo *pkt) |
| { |
| return pkt->state->pf; |
| } |
| |
| static inline const struct net_device *nft_in(const struct nft_pktinfo *pkt) |
| { |
| return pkt->state->in; |
| } |
| |
| static inline const struct net_device *nft_out(const struct nft_pktinfo *pkt) |
| { |
| return pkt->state->out; |
| } |
| |
| static inline void nft_set_pktinfo(struct nft_pktinfo *pkt, |
| struct sk_buff *skb, |
| const struct nf_hook_state *state) |
| { |
| pkt->skb = skb; |
| pkt->state = state; |
| } |
| |
| static inline void nft_set_pktinfo_unspec(struct nft_pktinfo *pkt) |
| { |
| pkt->flags = 0; |
| pkt->tprot = 0; |
| pkt->thoff = 0; |
| pkt->fragoff = 0; |
| } |
| |
| /** |
| * struct nft_verdict - nf_tables verdict |
| * |
| * @code: nf_tables/netfilter verdict code |
| * @chain: destination chain for NFT_JUMP/NFT_GOTO |
| */ |
| struct nft_verdict { |
| u32 code; |
| struct nft_chain *chain; |
| }; |
| |
| struct nft_data { |
| union { |
| u32 data[4]; |
| struct nft_verdict verdict; |
| }; |
| } __attribute__((aligned(__alignof__(u64)))); |
| |
| /** |
| * struct nft_regs - nf_tables register set |
| * |
| * @data: data registers |
| * @verdict: verdict register |
| * |
| * The first four data registers alias to the verdict register. |
| */ |
| struct nft_regs { |
| union { |
| u32 data[20]; |
| struct nft_verdict verdict; |
| }; |
| }; |
| |
| /* Store/load an u8, u16 or u64 integer to/from the u32 data register. |
| * |
| * Note, when using concatenations, register allocation happens at 32-bit |
| * level. So for store instruction, pad the rest part with zero to avoid |
| * garbage values. |
| */ |
| |
| static inline void nft_reg_store8(u32 *dreg, u8 val) |
| { |
| *dreg = 0; |
| *(u8 *)dreg = val; |
| } |
| |
| static inline u8 nft_reg_load8(const u32 *sreg) |
| { |
| return *(u8 *)sreg; |
| } |
| |
| static inline void nft_reg_store16(u32 *dreg, u16 val) |
| { |
| *dreg = 0; |
| *(u16 *)dreg = val; |
| } |
| |
| static inline void nft_reg_store_be16(u32 *dreg, __be16 val) |
| { |
| nft_reg_store16(dreg, (__force __u16)val); |
| } |
| |
| static inline u16 nft_reg_load16(const u32 *sreg) |
| { |
| return *(u16 *)sreg; |
| } |
| |
| static inline __be16 nft_reg_load_be16(const u32 *sreg) |
| { |
| return (__force __be16)nft_reg_load16(sreg); |
| } |
| |
| static inline __be32 nft_reg_load_be32(const u32 *sreg) |
| { |
| return *(__force __be32 *)sreg; |
| } |
| |
| static inline void nft_reg_store64(u64 *dreg, u64 val) |
| { |
| put_unaligned(val, dreg); |
| } |
| |
| static inline u64 nft_reg_load64(const u32 *sreg) |
| { |
| return get_unaligned((u64 *)sreg); |
| } |
| |
| static inline void nft_data_copy(u32 *dst, const struct nft_data *src, |
| unsigned int len) |
| { |
| if (len % NFT_REG32_SIZE) |
| dst[len / NFT_REG32_SIZE] = 0; |
| memcpy(dst, src, len); |
| } |
| |
| /** |
| * struct nft_ctx - nf_tables rule/set context |
| * |
| * @net: net namespace |
| * @table: the table the chain is contained in |
| * @chain: the chain the rule is contained in |
| * @nla: netlink attributes |
| * @portid: netlink portID of the original message |
| * @seq: netlink sequence number |
| * @family: protocol family |
| * @level: depth of the chains |
| * @report: notify via unicast netlink message |
| */ |
| struct nft_ctx { |
| struct net *net; |
| struct nft_table *table; |
| struct nft_chain *chain; |
| const struct nlattr * const *nla; |
| u32 portid; |
| u32 seq; |
| u16 flags; |
| u8 family; |
| u8 level; |
| bool report; |
| }; |
| |
| enum nft_data_desc_flags { |
| NFT_DATA_DESC_SETELEM = (1 << 0), |
| }; |
| |
| struct nft_data_desc { |
| enum nft_data_types type; |
| unsigned int size; |
| unsigned int len; |
| unsigned int flags; |
| }; |
| |
| int nft_data_init(const struct nft_ctx *ctx, struct nft_data *data, |
| struct nft_data_desc *desc, const struct nlattr *nla); |
| void nft_data_hold(const struct nft_data *data, enum nft_data_types type); |
| void nft_data_release(const struct nft_data *data, enum nft_data_types type); |
| int nft_data_dump(struct sk_buff *skb, int attr, const struct nft_data *data, |
| enum nft_data_types type, unsigned int len); |
| |
| static inline enum nft_data_types nft_dreg_to_type(enum nft_registers reg) |
| { |
| return reg == NFT_REG_VERDICT ? NFT_DATA_VERDICT : NFT_DATA_VALUE; |
| } |
| |
| static inline enum nft_registers nft_type_to_reg(enum nft_data_types type) |
| { |
| return type == NFT_DATA_VERDICT ? NFT_REG_VERDICT : NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE; |
| } |
| |
| int nft_parse_u32_check(const struct nlattr *attr, int max, u32 *dest); |
| int nft_dump_register(struct sk_buff *skb, unsigned int attr, unsigned int reg); |
| |
| int nft_parse_register_load(const struct nlattr *attr, u8 *sreg, u32 len); |
| int nft_parse_register_store(const struct nft_ctx *ctx, |
| const struct nlattr *attr, u8 *dreg, |
| const struct nft_data *data, |
| enum nft_data_types type, unsigned int len); |
| |
| /** |
| * struct nft_userdata - user defined data associated with an object |
| * |
| * @len: length of the data |
| * @data: content |
| * |
| * The presence of user data is indicated in an object specific fashion, |
| * so a length of zero can't occur and the value "len" indicates data |
| * of length len + 1. |
| */ |
| struct nft_userdata { |
| u8 len; |
| unsigned char data[]; |
| }; |
| |
| /** |
| * struct nft_set_elem - generic representation of set elements |
| * |
| * @key: element key |
| * @key_end: closing element key |
| * @priv: element private data and extensions |
| */ |
| struct nft_set_elem { |
| union { |
| u32 buf[NFT_DATA_VALUE_MAXLEN / sizeof(u32)]; |
| struct nft_data val; |
| } key; |
| union { |
| u32 buf[NFT_DATA_VALUE_MAXLEN / sizeof(u32)]; |
| struct nft_data val; |
| } key_end; |
| union { |
| u32 buf[NFT_DATA_VALUE_MAXLEN / sizeof(u32)]; |
| struct nft_data val; |
| } data; |
| void *priv; |
| }; |
| |
| struct nft_set; |
| struct nft_set_iter { |
| u8 genmask; |
| unsigned int count; |
| unsigned int skip; |
| int err; |
| int (*fn)(const struct nft_ctx *ctx, |
| struct nft_set *set, |
| const struct nft_set_iter *iter, |
| struct nft_set_elem *elem); |
| }; |
| |
| /** |
| * struct nft_set_desc - description of set elements |
| * |
| * @ktype: key type |
| * @klen: key length |
| * @dtype: data type |
| * @dlen: data length |
| * @objtype: object type |
| * @flags: flags |
| * @size: number of set elements |
| * @policy: set policy |
| * @gc_int: garbage collector interval |
| * @field_len: length of each field in concatenation, bytes |
| * @field_count: number of concatenated fields in element |
| * @expr: set must support for expressions |
| */ |
| struct nft_set_desc { |
| u32 ktype; |
| unsigned int klen; |
| u32 dtype; |
| unsigned int dlen; |
| u32 objtype; |
| unsigned int size; |
| u32 policy; |
| u32 gc_int; |
| u64 timeout; |
| u8 field_len[NFT_REG32_COUNT]; |
| u8 field_count; |
| bool expr; |
| }; |
| |
| /** |
| * enum nft_set_class - performance class |
| * |
| * @NFT_LOOKUP_O_1: constant, O(1) |
| * @NFT_LOOKUP_O_LOG_N: logarithmic, O(log N) |
| * @NFT_LOOKUP_O_N: linear, O(N) |
| */ |
| enum nft_set_class { |
| NFT_SET_CLASS_O_1, |
| NFT_SET_CLASS_O_LOG_N, |
| NFT_SET_CLASS_O_N, |
| }; |
| |
| /** |
| * struct nft_set_estimate - estimation of memory and performance |
| * characteristics |
| * |
| * @size: required memory |
| * @lookup: lookup performance class |
| * @space: memory class |
| */ |
| struct nft_set_estimate { |
| u64 size; |
| enum nft_set_class lookup; |
| enum nft_set_class space; |
| }; |
| |
| #define NFT_EXPR_MAXATTR 16 |
| #define NFT_EXPR_SIZE(size) (sizeof(struct nft_expr) + \ |
| ALIGN(size, __alignof__(struct nft_expr))) |
| |
| /** |
| * struct nft_expr - nf_tables expression |
| * |
| * @ops: expression ops |
| * @data: expression private data |
| */ |
| struct nft_expr { |
| const struct nft_expr_ops *ops; |
| unsigned char data[] |
| __attribute__((aligned(__alignof__(u64)))); |
| }; |
| |
| static inline void *nft_expr_priv(const struct nft_expr *expr) |
| { |
| return (void *)expr->data; |
| } |
| |
| int nft_expr_clone(struct nft_expr *dst, struct nft_expr *src); |
| void nft_expr_destroy(const struct nft_ctx *ctx, struct nft_expr *expr); |
| int nft_expr_dump(struct sk_buff *skb, unsigned int attr, |
| const struct nft_expr *expr); |
| |
| struct nft_set_ext; |
| |
| /** |
| * struct nft_set_ops - nf_tables set operations |
| * |
| * @lookup: look up an element within the set |
| * @update: update an element if exists, add it if doesn't exist |
| * @delete: delete an element |
| * @insert: insert new element into set |
| * @activate: activate new element in the next generation |
| * @deactivate: lookup for element and deactivate it in the next generation |
| * @flush: deactivate element in the next generation |
| * @remove: remove element from set |
| * @walk: iterate over all set elements |
| * @get: get set elements |
| * @privsize: function to return size of set private data |
| * @init: initialize private data of new set instance |
| * @destroy: destroy private data of set instance |
| * @elemsize: element private size |
| * |
| * Operations lookup, update and delete have simpler interfaces, are faster |
| * and currently only used in the packet path. All the rest are slower, |
| * control plane functions. |
| */ |
| struct nft_set_ops { |
| bool (*lookup)(const struct net *net, |
| const struct nft_set *set, |
| const u32 *key, |
| const struct nft_set_ext **ext); |
| bool (*update)(struct nft_set *set, |
| const u32 *key, |
| void *(*new)(struct nft_set *, |
| const struct nft_expr *, |
| struct nft_regs *), |
| const struct nft_expr *expr, |
| struct nft_regs *regs, |
| const struct nft_set_ext **ext); |
| bool (*delete)(const struct nft_set *set, |
| const u32 *key); |
| |
| int (*insert)(const struct net *net, |
| const struct nft_set *set, |
| const struct nft_set_elem *elem, |
| struct nft_set_ext **ext); |
| void (*activate)(const struct net *net, |
| const struct nft_set *set, |
| const struct nft_set_elem *elem); |
| void * (*deactivate)(const struct net *net, |
| const struct nft_set *set, |
| const struct nft_set_elem *elem); |
| bool (*flush)(const struct net *net, |
| const struct nft_set *set, |
| void *priv); |
| void (*remove)(const struct net *net, |
| const struct nft_set *set, |
| const struct nft_set_elem *elem); |
| void (*walk)(const struct nft_ctx *ctx, |
| struct nft_set *set, |
| struct nft_set_iter *iter); |
| void * (*get)(const struct net *net, |
| const struct nft_set *set, |
| const struct nft_set_elem *elem, |
| unsigned int flags); |
| void (*commit)(const struct nft_set *set); |
| void (*abort)(const struct nft_set *set); |
| u64 (*privsize)(const struct nlattr * const nla[], |
| const struct nft_set_desc *desc); |
| bool (*estimate)(const struct nft_set_desc *desc, |
| u32 features, |
| struct nft_set_estimate *est); |
| int (*init)(const struct nft_set *set, |
| const struct nft_set_desc *desc, |
| const struct nlattr * const nla[]); |
| void (*destroy)(const struct nft_ctx *ctx, |
| const struct nft_set *set); |
| void (*gc_init)(const struct nft_set *set); |
| |
| unsigned int elemsize; |
| }; |
| |
| /** |
| * struct nft_set_type - nf_tables set type |
| * |
| * @ops: set ops for this type |
| * @features: features supported by the implementation |
| */ |
| struct nft_set_type { |
| const struct nft_set_ops ops; |
| u32 features; |
| }; |
| #define to_set_type(o) container_of(o, struct nft_set_type, ops) |
| |
| struct nft_set_elem_expr { |
| u8 size; |
| unsigned char data[] |
| __attribute__((aligned(__alignof__(struct nft_expr)))); |
| }; |
| |
| #define nft_setelem_expr_at(__elem_expr, __offset) \ |
| ((struct nft_expr *)&__elem_expr->data[__offset]) |
| |
| #define nft_setelem_expr_foreach(__expr, __elem_expr, __size) \ |
| for (__expr = nft_setelem_expr_at(__elem_expr, 0), __size = 0; \ |
| __size < (__elem_expr)->size; \ |
| __size += (__expr)->ops->size, __expr = ((void *)(__expr)) + (__expr)->ops->size) |
| |
| #define NFT_SET_EXPR_MAX 2 |
| |
| /** |
| * struct nft_set - nf_tables set instance |
| * |
| * @list: table set list node |
| * @bindings: list of set bindings |
| * @refs: internal refcounting for async set destruction |
| * @table: table this set belongs to |
| * @net: netnamespace this set belongs to |
| * @name: name of the set |
| * @handle: unique handle of the set |
| * @ktype: key type (numeric type defined by userspace, not used in the kernel) |
| * @dtype: data type (verdict or numeric type defined by userspace) |
| * @objtype: object type (see NFT_OBJECT_* definitions) |
| * @size: maximum set size |
| * @field_len: length of each field in concatenation, bytes |
| * @field_count: number of concatenated fields in element |
| * @use: number of rules references to this set |
| * @nelems: number of elements |
| * @ndeact: number of deactivated elements queued for removal |
| * @timeout: default timeout value in jiffies |
| * @gc_int: garbage collection interval in msecs |
| * @policy: set parameterization (see enum nft_set_policies) |
| * @udlen: user data length |
| * @udata: user data |
| * @expr: stateful expression |
| * @ops: set ops |
| * @flags: set flags |
| * @dead: set will be freed, never cleared |
| * @genmask: generation mask |
| * @klen: key length |
| * @dlen: data length |
| * @data: private set data |
| */ |
| struct nft_set { |
| struct list_head list; |
| struct list_head bindings; |
| refcount_t refs; |
| struct nft_table *table; |
| possible_net_t net; |
| char *name; |
| u64 handle; |
| u32 ktype; |
| u32 dtype; |
| u32 objtype; |
| u32 size; |
| u8 field_len[NFT_REG32_COUNT]; |
| u8 field_count; |
| u32 use; |
| atomic_t nelems; |
| u32 ndeact; |
| u64 timeout; |
| u32 gc_int; |
| u16 policy; |
| u16 udlen; |
| unsigned char *udata; |
| struct list_head pending_update; |
| /* runtime data below here */ |
| const struct nft_set_ops *ops ____cacheline_aligned; |
| u16 flags:13, |
| dead:1, |
| genmask:2; |
| u8 klen; |
| u8 dlen; |
| u8 num_exprs; |
| struct nft_expr *exprs[NFT_SET_EXPR_MAX]; |
| struct list_head catchall_list; |
| unsigned char data[] |
| __attribute__((aligned(__alignof__(u64)))); |
| }; |
| |
| static inline bool nft_set_is_anonymous(const struct nft_set *set) |
| { |
| return set->flags & NFT_SET_ANONYMOUS; |
| } |
| |
| static inline void *nft_set_priv(const struct nft_set *set) |
| { |
| return (void *)set->data; |
| } |
| |
| static inline bool nft_set_gc_is_pending(const struct nft_set *s) |
| { |
| return refcount_read(&s->refs) != 1; |
| } |
| |
| static inline struct nft_set *nft_set_container_of(const void *priv) |
| { |
| return (void *)priv - offsetof(struct nft_set, data); |
| } |
| |
| struct nft_set *nft_set_lookup_global(const struct net *net, |
| const struct nft_table *table, |
| const struct nlattr *nla_set_name, |
| const struct nlattr *nla_set_id, |
| u8 genmask); |
| |
| struct nft_set_ext *nft_set_catchall_lookup(const struct net *net, |
| const struct nft_set *set); |
| |
| static inline unsigned long nft_set_gc_interval(const struct nft_set *set) |
| { |
| u32 gc_int = READ_ONCE(set->gc_int); |
| |
| return gc_int ? msecs_to_jiffies(gc_int) : HZ; |
| } |
| |
| /** |
| * struct nft_set_binding - nf_tables set binding |
| * |
| * @list: set bindings list node |
| * @chain: chain containing the rule bound to the set |
| * @flags: set action flags |
| * |
| * A set binding contains all information necessary for validation |
| * of new elements added to a bound set. |
| */ |
| struct nft_set_binding { |
| struct list_head list; |
| const struct nft_chain *chain; |
| u32 flags; |
| }; |
| |
| enum nft_trans_phase; |
| void nf_tables_activate_set(const struct nft_ctx *ctx, struct nft_set *set); |
| void nf_tables_deactivate_set(const struct nft_ctx *ctx, struct nft_set *set, |
| struct nft_set_binding *binding, |
| enum nft_trans_phase phase); |
| int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set, |
| struct nft_set_binding *binding); |
| void nf_tables_destroy_set(const struct nft_ctx *ctx, struct nft_set *set); |
| |
| /** |
| * enum nft_set_extensions - set extension type IDs |
| * |
| * @NFT_SET_EXT_KEY: element key |
| * @NFT_SET_EXT_KEY_END: upper bound element key, for ranges |
| * @NFT_SET_EXT_DATA: mapping data |
| * @NFT_SET_EXT_FLAGS: element flags |
| * @NFT_SET_EXT_TIMEOUT: element timeout |
| * @NFT_SET_EXT_EXPIRATION: element expiration time |
| * @NFT_SET_EXT_USERDATA: user data associated with the element |
| * @NFT_SET_EXT_EXPRESSIONS: expressions assiciated with the element |
| * @NFT_SET_EXT_OBJREF: stateful object reference associated with element |
| * @NFT_SET_EXT_NUM: number of extension types |
| */ |
| enum nft_set_extensions { |
| NFT_SET_EXT_KEY, |
| NFT_SET_EXT_KEY_END, |
| NFT_SET_EXT_DATA, |
| NFT_SET_EXT_FLAGS, |
| NFT_SET_EXT_TIMEOUT, |
| NFT_SET_EXT_EXPIRATION, |
| NFT_SET_EXT_USERDATA, |
| NFT_SET_EXT_EXPRESSIONS, |
| NFT_SET_EXT_OBJREF, |
| NFT_SET_EXT_NUM |
| }; |
| |
| /** |
| * struct nft_set_ext_type - set extension type |
| * |
| * @len: fixed part length of the extension |
| * @align: alignment requirements of the extension |
| */ |
| struct nft_set_ext_type { |
| u8 len; |
| u8 align; |
| }; |
| |
| extern const struct nft_set_ext_type nft_set_ext_types[]; |
| |
| /** |
| * struct nft_set_ext_tmpl - set extension template |
| * |
| * @len: length of extension area |
| * @offset: offsets of individual extension types |
| */ |
| struct nft_set_ext_tmpl { |
| u16 len; |
| u8 offset[NFT_SET_EXT_NUM]; |
| }; |
| |
| /** |
| * struct nft_set_ext - set extensions |
| * |
| * @genmask: generation mask |
| * @offset: offsets of individual extension types |
| * @data: beginning of extension data |
| */ |
| struct nft_set_ext { |
| u8 genmask; |
| u8 offset[NFT_SET_EXT_NUM]; |
| char data[]; |
| }; |
| |
| static inline void nft_set_ext_prepare(struct nft_set_ext_tmpl *tmpl) |
| { |
| memset(tmpl, 0, sizeof(*tmpl)); |
| tmpl->len = sizeof(struct nft_set_ext); |
| } |
| |
| static inline int nft_set_ext_add_length(struct nft_set_ext_tmpl *tmpl, u8 id, |
| unsigned int len) |
| { |
| tmpl->len = ALIGN(tmpl->len, nft_set_ext_types[id].align); |
| if (tmpl->len > U8_MAX) |
| return -EINVAL; |
| |
| tmpl->offset[id] = tmpl->len; |
| tmpl->len += nft_set_ext_types[id].len + len; |
| |
| return 0; |
| } |
| |
| static inline int nft_set_ext_add(struct nft_set_ext_tmpl *tmpl, u8 id) |
| { |
| return nft_set_ext_add_length(tmpl, id, 0); |
| } |
| |
| static inline void nft_set_ext_init(struct nft_set_ext *ext, |
| const struct nft_set_ext_tmpl *tmpl) |
| { |
| memcpy(ext->offset, tmpl->offset, sizeof(ext->offset)); |
| } |
| |
| static inline bool __nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) |
| { |
| return !!ext->offset[id]; |
| } |
| |
| static inline bool nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) |
| { |
| return ext && __nft_set_ext_exists(ext, id); |
| } |
| |
| static inline void *nft_set_ext(const struct nft_set_ext *ext, u8 id) |
| { |
| return (void *)ext + ext->offset[id]; |
| } |
| |
| static inline struct nft_data *nft_set_ext_key(const struct nft_set_ext *ext) |
| { |
| return nft_set_ext(ext, NFT_SET_EXT_KEY); |
| } |
| |
| static inline struct nft_data *nft_set_ext_key_end(const struct nft_set_ext *ext) |
| { |
| return nft_set_ext(ext, NFT_SET_EXT_KEY_END); |
| } |
| |
| static inline struct nft_data *nft_set_ext_data(const struct nft_set_ext *ext) |
| { |
| return nft_set_ext(ext, NFT_SET_EXT_DATA); |
| } |
| |
| static inline u8 *nft_set_ext_flags(const struct nft_set_ext *ext) |
| { |
| return nft_set_ext(ext, NFT_SET_EXT_FLAGS); |
| } |
| |
| static inline u64 *nft_set_ext_timeout(const struct nft_set_ext *ext) |
| { |
| return nft_set_ext(ext, NFT_SET_EXT_TIMEOUT); |
| } |
| |
| static inline u64 *nft_set_ext_expiration(const struct nft_set_ext *ext) |
| { |
| return nft_set_ext(ext, NFT_SET_EXT_EXPIRATION); |
| } |
| |
| static inline struct nft_userdata *nft_set_ext_userdata(const struct nft_set_ext *ext) |
| { |
| return nft_set_ext(ext, NFT_SET_EXT_USERDATA); |
| } |
| |
| static inline struct nft_set_elem_expr *nft_set_ext_expr(const struct nft_set_ext *ext) |
| { |
| return nft_set_ext(ext, NFT_SET_EXT_EXPRESSIONS); |
| } |
| |
| static inline bool nft_set_elem_expired(const struct nft_set_ext *ext) |
| { |
| return nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION) && |
| time_is_before_eq_jiffies64(*nft_set_ext_expiration(ext)); |
| } |
| |
| static inline struct nft_set_ext *nft_set_elem_ext(const struct nft_set *set, |
| void *elem) |
| { |
| return elem + set->ops->elemsize; |
| } |
| |
| static inline struct nft_object **nft_set_ext_obj(const struct nft_set_ext *ext) |
| { |
| return nft_set_ext(ext, NFT_SET_EXT_OBJREF); |
| } |
| |
| struct nft_expr *nft_set_elem_expr_alloc(const struct nft_ctx *ctx, |
| const struct nft_set *set, |
| const struct nlattr *attr); |
| |
| void *nft_set_elem_init(const struct nft_set *set, |
| const struct nft_set_ext_tmpl *tmpl, |
| const u32 *key, const u32 *key_end, const u32 *data, |
| u64 timeout, u64 expiration, gfp_t gfp); |
| int nft_set_elem_expr_clone(const struct nft_ctx *ctx, struct nft_set *set, |
| struct nft_expr *expr_array[]); |
| void nft_set_elem_destroy(const struct nft_set *set, void *elem, |
| bool destroy_expr); |
| void nf_tables_set_elem_destroy(const struct nft_ctx *ctx, |
| const struct nft_set *set, void *elem); |
| |
| struct nft_expr_ops; |
| /** |
| * struct nft_expr_type - nf_tables expression type |
| * |
| * @select_ops: function to select nft_expr_ops |
| * @release_ops: release nft_expr_ops |
| * @ops: default ops, used when no select_ops functions is present |
| * @list: used internally |
| * @name: Identifier |
| * @owner: module reference |
| * @policy: netlink attribute policy |
| * @maxattr: highest netlink attribute number |
| * @family: address family for AF-specific types |
| * @flags: expression type flags |
| */ |
| struct nft_expr_type { |
| const struct nft_expr_ops *(*select_ops)(const struct nft_ctx *, |
| const struct nlattr * const tb[]); |
| void (*release_ops)(const struct nft_expr_ops *ops); |
| const struct nft_expr_ops *ops; |
| struct list_head list; |
| const char *name; |
| struct module *owner; |
| const struct nla_policy *policy; |
| unsigned int maxattr; |
| u8 family; |
| u8 flags; |
| }; |
| |
| #define NFT_EXPR_STATEFUL 0x1 |
| #define NFT_EXPR_GC 0x2 |
| |
| enum nft_trans_phase { |
| NFT_TRANS_PREPARE, |
| NFT_TRANS_PREPARE_ERROR, |
| NFT_TRANS_ABORT, |
| NFT_TRANS_COMMIT, |
| NFT_TRANS_RELEASE |
| }; |
| |
| struct nft_flow_rule; |
| struct nft_offload_ctx; |
| |
| /** |
| * struct nft_expr_ops - nf_tables expression operations |
| * |
| * @eval: Expression evaluation function |
| * @size: full expression size, including private data size |
| * @init: initialization function |
| * @activate: activate expression in the next generation |
| * @deactivate: deactivate expression in next generation |
| * @destroy: destruction function, called after synchronize_rcu |
| * @dump: function to dump parameters |
| * @type: expression type |
| * @validate: validate expression, called during loop detection |
| * @data: extra data to attach to this expression operation |
| */ |
| struct nft_expr_ops { |
| void (*eval)(const struct nft_expr *expr, |
| struct nft_regs *regs, |
| const struct nft_pktinfo *pkt); |
| int (*clone)(struct nft_expr *dst, |
| const struct nft_expr *src); |
| unsigned int size; |
| |
| int (*init)(const struct nft_ctx *ctx, |
| const struct nft_expr *expr, |
| const struct nlattr * const tb[]); |
| void (*activate)(const struct nft_ctx *ctx, |
| const struct nft_expr *expr); |
| void (*deactivate)(const struct nft_ctx *ctx, |
| const struct nft_expr *expr, |
| enum nft_trans_phase phase); |
| void (*destroy)(const struct nft_ctx *ctx, |
| const struct nft_expr *expr); |
| void (*destroy_clone)(const struct nft_ctx *ctx, |
| const struct nft_expr *expr); |
| int (*dump)(struct sk_buff *skb, |
| const struct nft_expr *expr); |
| int (*validate)(const struct nft_ctx *ctx, |
| const struct nft_expr *expr, |
| const struct nft_data **data); |
| bool (*gc)(struct net *net, |
| const struct nft_expr *expr); |
| int (*offload)(struct nft_offload_ctx *ctx, |
| struct nft_flow_rule *flow, |
| const struct nft_expr *expr); |
| bool (*offload_action)(const struct nft_expr *expr); |
| void (*offload_stats)(struct nft_expr *expr, |
| const struct flow_stats *stats); |
| const struct nft_expr_type *type; |
| void *data; |
| }; |
| |
| /** |
| * struct nft_rule - nf_tables rule |
| * |
| * @list: used internally |
| * @handle: rule handle |
| * @genmask: generation mask |
| * @dlen: length of expression data |
| * @udata: user data is appended to the rule |
| * @data: expression data |
| */ |
| struct nft_rule { |
| struct list_head list; |
| u64 handle:42, |
| genmask:2, |
| dlen:12, |
| udata:1; |
| unsigned char data[] |
| __attribute__((aligned(__alignof__(struct nft_expr)))); |
| }; |
| |
| static inline struct nft_expr *nft_expr_first(const struct nft_rule *rule) |
| { |
| return (struct nft_expr *)&rule->data[0]; |
| } |
| |
| static inline struct nft_expr *nft_expr_next(const struct nft_expr *expr) |
| { |
| return ((void *)expr) + expr->ops->size; |
| } |
| |
| static inline struct nft_expr *nft_expr_last(const struct nft_rule *rule) |
| { |
| return (struct nft_expr *)&rule->data[rule->dlen]; |
| } |
| |
| static inline bool nft_expr_more(const struct nft_rule *rule, |
| const struct nft_expr *expr) |
| { |
| return expr != nft_expr_last(rule) && expr->ops; |
| } |
| |
| static inline struct nft_userdata *nft_userdata(const struct nft_rule *rule) |
| { |
| return (void *)&rule->data[rule->dlen]; |
| } |
| |
| void nft_rule_expr_activate(const struct nft_ctx *ctx, struct nft_rule *rule); |
| void nft_rule_expr_deactivate(const struct nft_ctx *ctx, struct nft_rule *rule, |
| enum nft_trans_phase phase); |
| void nf_tables_rule_destroy(const struct nft_ctx *ctx, struct nft_rule *rule); |
| |
| static inline void nft_set_elem_update_expr(const struct nft_set_ext *ext, |
| struct nft_regs *regs, |
| const struct nft_pktinfo *pkt) |
| { |
| struct nft_set_elem_expr *elem_expr; |
| struct nft_expr *expr; |
| u32 size; |
| |
| if (__nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS)) { |
| elem_expr = nft_set_ext_expr(ext); |
| nft_setelem_expr_foreach(expr, elem_expr, size) { |
| expr->ops->eval(expr, regs, pkt); |
| if (regs->verdict.code == NFT_BREAK) |
| return; |
| } |
| } |
| } |
| |
| /* |
| * The last pointer isn't really necessary, but the compiler isn't able to |
| * determine that the result of nft_expr_last() is always the same since it |
| * can't assume that the dlen value wasn't changed within calls in the loop. |
| */ |
| #define nft_rule_for_each_expr(expr, last, rule) \ |
| for ((expr) = nft_expr_first(rule), (last) = nft_expr_last(rule); \ |
| (expr) != (last); \ |
| (expr) = nft_expr_next(expr)) |
| |
| #define NFT_CHAIN_POLICY_UNSET U8_MAX |
| |
| /** |
| * struct nft_chain - nf_tables chain |
| * |
| * @rules: list of rules in the chain |
| * @list: used internally |
| * @rhlhead: used internally |
| * @table: table that this chain belongs to |
| * @handle: chain handle |
| * @use: number of jump references to this chain |
| * @flags: bitmask of enum nft_chain_flags |
| * @name: name of the chain |
| */ |
| struct nft_chain { |
| struct nft_rule *__rcu *rules_gen_0; |
| struct nft_rule *__rcu *rules_gen_1; |
| struct list_head rules; |
| struct list_head list; |
| struct rhlist_head rhlhead; |
| struct nft_table *table; |
| u64 handle; |
| u32 use; |
| u8 flags:5, |
| bound:1, |
| genmask:2; |
| char *name; |
| u16 udlen; |
| u8 *udata; |
| |
| /* Only used during control plane commit phase: */ |
| struct nft_rule **rules_next; |
| }; |
| |
| int nft_chain_validate(const struct nft_ctx *ctx, const struct nft_chain *chain); |
| int nft_setelem_validate(const struct nft_ctx *ctx, struct nft_set *set, |
| const struct nft_set_iter *iter, |
| struct nft_set_elem *elem); |
| int nft_set_catchall_validate(const struct nft_ctx *ctx, struct nft_set *set); |
| int nf_tables_bind_chain(const struct nft_ctx *ctx, struct nft_chain *chain); |
| void nf_tables_unbind_chain(const struct nft_ctx *ctx, struct nft_chain *chain); |
| |
| enum nft_chain_types { |
| NFT_CHAIN_T_DEFAULT = 0, |
| NFT_CHAIN_T_ROUTE, |
| NFT_CHAIN_T_NAT, |
| NFT_CHAIN_T_MAX |
| }; |
| |
| /** |
| * struct nft_chain_type - nf_tables chain type info |
| * |
| * @name: name of the type |
| * @type: numeric identifier |
| * @family: address family |
| * @owner: module owner |
| * @hook_mask: mask of valid hooks |
| * @hooks: array of hook functions |
| * @ops_register: base chain register function |
| * @ops_unregister: base chain unregister function |
| */ |
| struct nft_chain_type { |
| const char *name; |
| enum nft_chain_types type; |
| int family; |
| struct module *owner; |
| unsigned int hook_mask; |
| nf_hookfn *hooks[NFT_MAX_HOOKS]; |
| int (*ops_register)(struct net *net, const struct nf_hook_ops *ops); |
| void (*ops_unregister)(struct net *net, const struct nf_hook_ops *ops); |
| }; |
| |
| int nft_chain_validate_dependency(const struct nft_chain *chain, |
| enum nft_chain_types type); |
| int nft_chain_validate_hooks(const struct nft_chain *chain, |
| unsigned int hook_flags); |
| |
| static inline bool nft_chain_binding(const struct nft_chain *chain) |
| { |
| return chain->flags & NFT_CHAIN_BINDING; |
| } |
| |
| static inline bool nft_chain_is_bound(struct nft_chain *chain) |
| { |
| return (chain->flags & NFT_CHAIN_BINDING) && chain->bound; |
| } |
| |
| int nft_chain_add(struct nft_table *table, struct nft_chain *chain); |
| void nft_chain_del(struct nft_chain *chain); |
| void nf_tables_chain_destroy(struct nft_ctx *ctx); |
| |
| struct nft_stats { |
| u64 bytes; |
| u64 pkts; |
| struct u64_stats_sync syncp; |
| }; |
| |
| struct nft_hook { |
| struct list_head list; |
| struct nf_hook_ops ops; |
| struct rcu_head rcu; |
| }; |
| |
| /** |
| * struct nft_base_chain - nf_tables base chain |
| * |
| * @ops: netfilter hook ops |
| * @hook_list: list of netfilter hooks (for NFPROTO_NETDEV family) |
| * @type: chain type |
| * @policy: default policy |
| * @stats: per-cpu chain stats |
| * @chain: the chain |
| * @flow_block: flow block (for hardware offload) |
| */ |
| struct nft_base_chain { |
| struct nf_hook_ops ops; |
| struct list_head hook_list; |
| const struct nft_chain_type *type; |
| u8 policy; |
| u8 flags; |
| struct nft_stats __percpu *stats; |
| struct nft_chain chain; |
| struct flow_block flow_block; |
| }; |
| |
| static inline struct nft_base_chain *nft_base_chain(const struct nft_chain *chain) |
| { |
| return container_of(chain, struct nft_base_chain, chain); |
| } |
| |
| static inline bool nft_is_base_chain(const struct nft_chain *chain) |
| { |
| return chain->flags & NFT_CHAIN_BASE; |
| } |
| |
| int __nft_release_basechain(struct nft_ctx *ctx); |
| |
| unsigned int nft_do_chain(struct nft_pktinfo *pkt, void *priv); |
| |
| static inline bool nft_use_inc(u32 *use) |
| { |
| if (*use == UINT_MAX) |
| return false; |
| |
| (*use)++; |
| |
| return true; |
| } |
| |
| static inline void nft_use_dec(u32 *use) |
| { |
| WARN_ON_ONCE((*use)-- == 0); |
| } |
| |
| /* For error and abort path: restore use counter to previous state. */ |
| static inline void nft_use_inc_restore(u32 *use) |
| { |
| WARN_ON_ONCE(!nft_use_inc(use)); |
| } |
| |
| #define nft_use_dec_restore nft_use_dec |
| |
| /** |
| * struct nft_table - nf_tables table |
| * |
| * @list: used internally |
| * @chains_ht: chains in the table |
| * @chains: same, for stable walks |
| * @sets: sets in the table |
| * @objects: stateful objects in the table |
| * @flowtables: flow tables in the table |
| * @hgenerator: handle generator state |
| * @handle: table handle |
| * @use: number of chain references to this table |
| * @flags: table flag (see enum nft_table_flags) |
| * @genmask: generation mask |
| * @afinfo: address family info |
| * @name: name of the table |
| */ |
| struct nft_table { |
| struct list_head list; |
| struct rhltable chains_ht; |
| struct list_head chains; |
| struct list_head sets; |
| struct list_head objects; |
| struct list_head flowtables; |
| u64 hgenerator; |
| u64 handle; |
| u32 use; |
| u16 family:6, |
| flags:8, |
| genmask:2; |
| u32 nlpid; |
| char *name; |
| u16 udlen; |
| u8 *udata; |
| }; |
| |
| static inline bool nft_table_has_owner(const struct nft_table *table) |
| { |
| return table->flags & NFT_TABLE_F_OWNER; |
| } |
| |
| static inline bool nft_base_chain_netdev(int family, u32 hooknum) |
| { |
| return family == NFPROTO_NETDEV || |
| (family == NFPROTO_INET && hooknum == NF_INET_INGRESS); |
| } |
| |
| void nft_register_chain_type(const struct nft_chain_type *); |
| void nft_unregister_chain_type(const struct nft_chain_type *); |
| |
| int nft_register_expr(struct nft_expr_type *); |
| void nft_unregister_expr(struct nft_expr_type *); |
| |
| int nft_verdict_dump(struct sk_buff *skb, int type, |
| const struct nft_verdict *v); |
| |
| /** |
| * struct nft_object_hash_key - key to lookup nft_object |
| * |
| * @name: name of the stateful object to look up |
| * @table: table the object belongs to |
| */ |
| struct nft_object_hash_key { |
| const char *name; |
| const struct nft_table *table; |
| }; |
| |
| /** |
| * struct nft_object - nf_tables stateful object |
| * |
| * @list: table stateful object list node |
| * @key: keys that identify this object |
| * @rhlhead: nft_objname_ht node |
| * @genmask: generation mask |
| * @use: number of references to this stateful object |
| * @handle: unique object handle |
| * @ops: object operations |
| * @data: object data, layout depends on type |
| */ |
| struct nft_object { |
| struct list_head list; |
| struct rhlist_head rhlhead; |
| struct nft_object_hash_key key; |
| u32 genmask:2; |
| u32 use; |
| u64 handle; |
| u16 udlen; |
| u8 *udata; |
| /* runtime data below here */ |
| const struct nft_object_ops *ops ____cacheline_aligned; |
| unsigned char data[] |
| __attribute__((aligned(__alignof__(u64)))); |
| }; |
| |
| static inline void *nft_obj_data(const struct nft_object *obj) |
| { |
| return (void *)obj->data; |
| } |
| |
| #define nft_expr_obj(expr) *((struct nft_object **)nft_expr_priv(expr)) |
| |
| struct nft_object *nft_obj_lookup(const struct net *net, |
| const struct nft_table *table, |
| const struct nlattr *nla, u32 objtype, |
| u8 genmask); |
| |
| void nft_obj_notify(struct net *net, const struct nft_table *table, |
| struct nft_object *obj, u32 portid, u32 seq, |
| int event, u16 flags, int family, int report, gfp_t gfp); |
| |
| /** |
| * struct nft_object_type - stateful object type |
| * |
| * @select_ops: function to select nft_object_ops |
| * @ops: default ops, used when no select_ops functions is present |
| * @list: list node in list of object types |
| * @type: stateful object numeric type |
| * @owner: module owner |
| * @maxattr: maximum netlink attribute |
| * @family: address family for AF-specific object types |
| * @policy: netlink attribute policy |
| */ |
| struct nft_object_type { |
| const struct nft_object_ops *(*select_ops)(const struct nft_ctx *, |
| const struct nlattr * const tb[]); |
| const struct nft_object_ops *ops; |
| struct list_head list; |
| u32 type; |
| unsigned int maxattr; |
| u8 family; |
| struct module *owner; |
| const struct nla_policy *policy; |
| }; |
| |
| /** |
| * struct nft_object_ops - stateful object operations |
| * |
| * @eval: stateful object evaluation function |
| * @size: stateful object size |
| * @init: initialize object from netlink attributes |
| * @destroy: release existing stateful object |
| * @dump: netlink dump stateful object |
| * @update: update stateful object |
| */ |
| struct nft_object_ops { |
| void (*eval)(struct nft_object *obj, |
| struct nft_regs *regs, |
| const struct nft_pktinfo *pkt); |
| unsigned int size; |
| int (*init)(const struct nft_ctx *ctx, |
| const struct nlattr *const tb[], |
| struct nft_object *obj); |
| void (*destroy)(const struct nft_ctx *ctx, |
| struct nft_object *obj); |
| int (*dump)(struct sk_buff *skb, |
| struct nft_object *obj, |
| bool reset); |
| void (*update)(struct nft_object *obj, |
| struct nft_object *newobj); |
| const struct nft_object_type *type; |
| }; |
| |
| int nft_register_obj(struct nft_object_type *obj_type); |
| void nft_unregister_obj(struct nft_object_type *obj_type); |
| |
| #define NFT_NETDEVICE_MAX 256 |
| |
| /** |
| * struct nft_flowtable - nf_tables flow table |
| * |
| * @list: flow table list node in table list |
| * @table: the table the flow table is contained in |
| * @name: name of this flow table |
| * @hooknum: hook number |
| * @ops_len: number of hooks in array |
| * @genmask: generation mask |
| * @use: number of references to this flow table |
| * @handle: unique object handle |
| * @dev_name: array of device names |
| * @data: rhashtable and garbage collector |
| * @ops: array of hooks |
| */ |
| struct nft_flowtable { |
| struct list_head list; |
| struct nft_table *table; |
| char *name; |
| int hooknum; |
| int ops_len; |
| u32 genmask:2; |
| u32 use; |
| u64 handle; |
| /* runtime data below here */ |
| struct list_head hook_list ____cacheline_aligned; |
| struct nf_flowtable data; |
| }; |
| |
| struct nft_flowtable *nft_flowtable_lookup(const struct nft_table *table, |
| const struct nlattr *nla, |
| u8 genmask); |
| |
| void nf_tables_deactivate_flowtable(const struct nft_ctx *ctx, |
| struct nft_flowtable *flowtable, |
| enum nft_trans_phase phase); |
| |
| void nft_register_flowtable_type(struct nf_flowtable_type *type); |
| void nft_unregister_flowtable_type(struct nf_flowtable_type *type); |
| |
| /** |
| * struct nft_traceinfo - nft tracing information and state |
| * |
| * @pkt: pktinfo currently processed |
| * @basechain: base chain currently processed |
| * @chain: chain currently processed |
| * @rule: rule that was evaluated |
| * @verdict: verdict given by rule |
| * @type: event type (enum nft_trace_types) |
| * @packet_dumped: packet headers sent in a previous traceinfo message |
| * @trace: other struct members are initialised |
| */ |
| struct nft_traceinfo { |
| const struct nft_pktinfo *pkt; |
| const struct nft_base_chain *basechain; |
| const struct nft_chain *chain; |
| const struct nft_rule *rule; |
| const struct nft_verdict *verdict; |
| enum nft_trace_types type; |
| bool packet_dumped; |
| bool trace; |
| }; |
| |
| void nft_trace_init(struct nft_traceinfo *info, const struct nft_pktinfo *pkt, |
| const struct nft_verdict *verdict, |
| const struct nft_chain *basechain); |
| |
| void nft_trace_notify(struct nft_traceinfo *info); |
| |
| #define MODULE_ALIAS_NFT_CHAIN(family, name) \ |
| MODULE_ALIAS("nft-chain-" __stringify(family) "-" name) |
| |
| #define MODULE_ALIAS_NFT_AF_EXPR(family, name) \ |
| MODULE_ALIAS("nft-expr-" __stringify(family) "-" name) |
| |
| #define MODULE_ALIAS_NFT_EXPR(name) \ |
| MODULE_ALIAS("nft-expr-" name) |
| |
| #define MODULE_ALIAS_NFT_OBJ(type) \ |
| MODULE_ALIAS("nft-obj-" __stringify(type)) |
| |
| #if IS_ENABLED(CONFIG_NF_TABLES) |
| |
| /* |
| * The gencursor defines two generations, the currently active and the |
| * next one. Objects contain a bitmask of 2 bits specifying the generations |
| * they're active in. A set bit means they're inactive in the generation |
| * represented by that bit. |
| * |
| * New objects start out as inactive in the current and active in the |
| * next generation. When committing the ruleset the bitmask is cleared, |
| * meaning they're active in all generations. When removing an object, |
| * it is set inactive in the next generation. After committing the ruleset, |
| * the objects are removed. |
| */ |
| static inline unsigned int nft_gencursor_next(const struct net *net) |
| { |
| return net->nft.gencursor + 1 == 1 ? 1 : 0; |
| } |
| |
| static inline u8 nft_genmask_next(const struct net *net) |
| { |
| return 1 << nft_gencursor_next(net); |
| } |
| |
| static inline u8 nft_genmask_cur(const struct net *net) |
| { |
| /* Use READ_ONCE() to prevent refetching the value for atomicity */ |
| return 1 << READ_ONCE(net->nft.gencursor); |
| } |
| |
| #define NFT_GENMASK_ANY ((1 << 0) | (1 << 1)) |
| |
| /* |
| * Generic transaction helpers |
| */ |
| |
| /* Check if this object is currently active. */ |
| #define nft_is_active(__net, __obj) \ |
| (((__obj)->genmask & nft_genmask_cur(__net)) == 0) |
| |
| /* Check if this object is active in the next generation. */ |
| #define nft_is_active_next(__net, __obj) \ |
| (((__obj)->genmask & nft_genmask_next(__net)) == 0) |
| |
| /* This object becomes active in the next generation. */ |
| #define nft_activate_next(__net, __obj) \ |
| (__obj)->genmask = nft_genmask_cur(__net) |
| |
| /* This object becomes inactive in the next generation. */ |
| #define nft_deactivate_next(__net, __obj) \ |
| (__obj)->genmask = nft_genmask_next(__net) |
| |
| /* After committing the ruleset, clear the stale generation bit. */ |
| #define nft_clear(__net, __obj) \ |
| (__obj)->genmask &= ~nft_genmask_next(__net) |
| #define nft_active_genmask(__obj, __genmask) \ |
| !((__obj)->genmask & __genmask) |
| |
| /* |
| * Set element transaction helpers |
| */ |
| |
| static inline bool nft_set_elem_active(const struct nft_set_ext *ext, |
| u8 genmask) |
| { |
| return !(ext->genmask & genmask); |
| } |
| |
| static inline void nft_set_elem_change_active(const struct net *net, |
| const struct nft_set *set, |
| struct nft_set_ext *ext) |
| { |
| ext->genmask ^= nft_genmask_next(net); |
| } |
| |
| #endif /* IS_ENABLED(CONFIG_NF_TABLES) */ |
| |
| #define NFT_SET_ELEM_DEAD_MASK (1 << 2) |
| |
| #if defined(__LITTLE_ENDIAN_BITFIELD) |
| #define NFT_SET_ELEM_DEAD_BIT 2 |
| #elif defined(__BIG_ENDIAN_BITFIELD) |
| #define NFT_SET_ELEM_DEAD_BIT (BITS_PER_LONG - BITS_PER_BYTE + 2) |
| #else |
| #error |
| #endif |
| |
| static inline void nft_set_elem_dead(struct nft_set_ext *ext) |
| { |
| unsigned long *word = (unsigned long *)ext; |
| |
| BUILD_BUG_ON(offsetof(struct nft_set_ext, genmask) != 0); |
| set_bit(NFT_SET_ELEM_DEAD_BIT, word); |
| } |
| |
| static inline int nft_set_elem_is_dead(const struct nft_set_ext *ext) |
| { |
| unsigned long *word = (unsigned long *)ext; |
| |
| BUILD_BUG_ON(offsetof(struct nft_set_ext, genmask) != 0); |
| return test_bit(NFT_SET_ELEM_DEAD_BIT, word); |
| } |
| |
| /** |
| * struct nft_trans - nf_tables object update in transaction |
| * |
| * @list: used internally |
| * @binding_list: list of objects with possible bindings |
| * @msg_type: message type |
| * @put_net: ctx->net needs to be put |
| * @ctx: transaction context |
| * @data: internal information related to the transaction |
| */ |
| struct nft_trans { |
| struct list_head list; |
| struct list_head binding_list; |
| int msg_type; |
| bool put_net; |
| struct nft_ctx ctx; |
| char data[]; |
| }; |
| |
| struct nft_trans_rule { |
| struct nft_rule *rule; |
| struct nft_flow_rule *flow; |
| u32 rule_id; |
| bool bound; |
| }; |
| |
| #define nft_trans_rule(trans) \ |
| (((struct nft_trans_rule *)trans->data)->rule) |
| #define nft_trans_flow_rule(trans) \ |
| (((struct nft_trans_rule *)trans->data)->flow) |
| #define nft_trans_rule_id(trans) \ |
| (((struct nft_trans_rule *)trans->data)->rule_id) |
| #define nft_trans_rule_bound(trans) \ |
| (((struct nft_trans_rule *)trans->data)->bound) |
| |
| struct nft_trans_set { |
| struct nft_set *set; |
| u32 set_id; |
| u32 gc_int; |
| u64 timeout; |
| bool update; |
| bool bound; |
| }; |
| |
| #define nft_trans_set(trans) \ |
| (((struct nft_trans_set *)trans->data)->set) |
| #define nft_trans_set_id(trans) \ |
| (((struct nft_trans_set *)trans->data)->set_id) |
| #define nft_trans_set_bound(trans) \ |
| (((struct nft_trans_set *)trans->data)->bound) |
| #define nft_trans_set_update(trans) \ |
| (((struct nft_trans_set *)trans->data)->update) |
| #define nft_trans_set_timeout(trans) \ |
| (((struct nft_trans_set *)trans->data)->timeout) |
| #define nft_trans_set_gc_int(trans) \ |
| (((struct nft_trans_set *)trans->data)->gc_int) |
| |
| struct nft_trans_chain { |
| struct nft_chain *chain; |
| bool update; |
| char *name; |
| struct nft_stats __percpu *stats; |
| u8 policy; |
| bool bound; |
| u32 chain_id; |
| }; |
| |
| #define nft_trans_chain(trans) \ |
| (((struct nft_trans_chain *)trans->data)->chain) |
| #define nft_trans_chain_update(trans) \ |
| (((struct nft_trans_chain *)trans->data)->update) |
| #define nft_trans_chain_name(trans) \ |
| (((struct nft_trans_chain *)trans->data)->name) |
| #define nft_trans_chain_stats(trans) \ |
| (((struct nft_trans_chain *)trans->data)->stats) |
| #define nft_trans_chain_policy(trans) \ |
| (((struct nft_trans_chain *)trans->data)->policy) |
| #define nft_trans_chain_bound(trans) \ |
| (((struct nft_trans_chain *)trans->data)->bound) |
| #define nft_trans_chain_id(trans) \ |
| (((struct nft_trans_chain *)trans->data)->chain_id) |
| |
| struct nft_trans_table { |
| bool update; |
| }; |
| |
| #define nft_trans_table_update(trans) \ |
| (((struct nft_trans_table *)trans->data)->update) |
| |
| struct nft_trans_elem { |
| struct nft_set *set; |
| struct nft_set_elem elem; |
| bool bound; |
| }; |
| |
| #define nft_trans_elem_set(trans) \ |
| (((struct nft_trans_elem *)trans->data)->set) |
| #define nft_trans_elem(trans) \ |
| (((struct nft_trans_elem *)trans->data)->elem) |
| #define nft_trans_elem_set_bound(trans) \ |
| (((struct nft_trans_elem *)trans->data)->bound) |
| |
| struct nft_trans_obj { |
| struct nft_object *obj; |
| struct nft_object *newobj; |
| bool update; |
| }; |
| |
| #define nft_trans_obj(trans) \ |
| (((struct nft_trans_obj *)trans->data)->obj) |
| #define nft_trans_obj_newobj(trans) \ |
| (((struct nft_trans_obj *)trans->data)->newobj) |
| #define nft_trans_obj_update(trans) \ |
| (((struct nft_trans_obj *)trans->data)->update) |
| |
| struct nft_trans_flowtable { |
| struct nft_flowtable *flowtable; |
| bool update; |
| struct list_head hook_list; |
| u32 flags; |
| }; |
| |
| #define nft_trans_flowtable(trans) \ |
| (((struct nft_trans_flowtable *)trans->data)->flowtable) |
| #define nft_trans_flowtable_update(trans) \ |
| (((struct nft_trans_flowtable *)trans->data)->update) |
| #define nft_trans_flowtable_hooks(trans) \ |
| (((struct nft_trans_flowtable *)trans->data)->hook_list) |
| #define nft_trans_flowtable_flags(trans) \ |
| (((struct nft_trans_flowtable *)trans->data)->flags) |
| |
| #define NFT_TRANS_GC_BATCHCOUNT 256 |
| |
| struct nft_trans_gc { |
| struct list_head list; |
| struct net *net; |
| struct nft_set *set; |
| u32 seq; |
| u16 count; |
| void *priv[NFT_TRANS_GC_BATCHCOUNT]; |
| struct rcu_head rcu; |
| }; |
| |
| struct nft_trans_gc *nft_trans_gc_alloc(struct nft_set *set, |
| unsigned int gc_seq, gfp_t gfp); |
| void nft_trans_gc_destroy(struct nft_trans_gc *trans); |
| |
| struct nft_trans_gc *nft_trans_gc_queue_async(struct nft_trans_gc *gc, |
| unsigned int gc_seq, gfp_t gfp); |
| void nft_trans_gc_queue_async_done(struct nft_trans_gc *gc); |
| |
| struct nft_trans_gc *nft_trans_gc_queue_sync(struct nft_trans_gc *gc, gfp_t gfp); |
| void nft_trans_gc_queue_sync_done(struct nft_trans_gc *trans); |
| |
| void nft_trans_gc_elem_add(struct nft_trans_gc *gc, void *priv); |
| |
| struct nft_trans_gc *nft_trans_gc_catchall_async(struct nft_trans_gc *gc, |
| unsigned int gc_seq); |
| struct nft_trans_gc *nft_trans_gc_catchall_sync(struct nft_trans_gc *gc); |
| |
| void nft_setelem_data_deactivate(const struct net *net, |
| const struct nft_set *set, |
| struct nft_set_elem *elem); |
| |
| int __init nft_chain_filter_init(void); |
| void nft_chain_filter_fini(void); |
| |
| void __init nft_chain_route_init(void); |
| void nft_chain_route_fini(void); |
| |
| void nf_tables_trans_destroy_flush_work(void); |
| |
| int nf_msecs_to_jiffies64(const struct nlattr *nla, u64 *result); |
| __be64 nf_jiffies64_to_msecs(u64 input); |
| |
| #ifdef CONFIG_MODULES |
| __printf(2, 3) int nft_request_module(struct net *net, const char *fmt, ...); |
| #else |
| static inline int nft_request_module(struct net *net, const char *fmt, ...) { return -ENOENT; } |
| #endif |
| |
| struct nftables_pernet { |
| struct list_head tables; |
| struct list_head commit_list; |
| struct list_head binding_list; |
| struct list_head module_list; |
| struct list_head notify_list; |
| struct mutex commit_mutex; |
| u64 table_handle; |
| unsigned int base_seq; |
| u8 validate_state; |
| unsigned int gc_seq; |
| }; |
| |
| extern unsigned int nf_tables_net_id; |
| |
| static inline struct nftables_pernet *nft_pernet(const struct net *net) |
| { |
| return net_generic(net, nf_tables_net_id); |
| } |
| |
| #endif /* _NET_NF_TABLES_H */ |