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-rw-r--r--include/net/netfilter/nf_tables.h1745
1 files changed, 1745 insertions, 0 deletions
diff --git a/include/net/netfilter/nf_tables.h b/include/net/netfilter/nf_tables.h
new file mode 100644
index 000000000..c726da3b7
--- /dev/null
+++ b/include/net/netfilter/nf_tables.h
@@ -0,0 +1,1745 @@
+/* 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))));
+
+#define NFT_REG32_NUM 20
+
+/**
+ * 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[NFT_REG32_NUM];
+ struct nft_verdict verdict;
+ };
+};
+
+struct nft_regs_track {
+ struct {
+ const struct nft_expr *selector;
+ const struct nft_expr *bitwise;
+ u8 num_reg;
+ } regs[NFT_REG32_NUM];
+
+ const struct nft_expr *cur;
+ const struct nft_expr *last;
+};
+
+/* 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);
+bool nft_expr_reduce_bitwise(struct nft_regs_track *track,
+ 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];
+ u8 ext_len[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->ext_len[id] = nft_set_ext_types[id].len + len;
+ tmpl->len += tmpl->ext_len[id];
+
+ 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 (*reduce)(struct nft_regs_track *track,
+ const struct nft_expr *expr);
+ 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_rule_dp {
+ u64 is_last:1,
+ dlen:12,
+ handle:42; /* for tracing */
+ unsigned char data[]
+ __attribute__((aligned(__alignof__(struct nft_expr))));
+};
+
+struct nft_rule_blob {
+ unsigned long size;
+ unsigned char data[]
+ __attribute__((aligned(__alignof__(struct nft_rule_dp))));
+};
+
+/**
+ * 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_blob __rcu *blob_gen_0;
+ struct nft_rule_blob __rcu *blob_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_blob *blob_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
+ * @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;
+ 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
+ *
+ * @trace: other struct members are initialised
+ * @nf_trace: copy of skb->nf_trace before rule evaluation
+ * @type: event type (enum nft_trace_types)
+ * @skbid: hash of skb to be used as trace id
+ * @packet_dumped: packet headers sent in a previous traceinfo message
+ * @pkt: pktinfo currently processed
+ * @basechain: base chain currently processed
+ * @chain: chain currently processed
+ * @rule: rule that was evaluated
+ * @verdict: verdict given by rule
+ */
+struct nft_traceinfo {
+ bool trace;
+ bool nf_trace;
+ bool packet_dumped;
+ enum nft_trace_types type:8;
+ u32 skbid;
+ const struct nft_pktinfo *pkt;
+ const struct nft_base_chain *basechain;
+ const struct nft_chain *chain;
+ const struct nft_rule_dp *rule;
+ const struct nft_verdict *verdict;
+};
+
+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);
+}
+
+#define __NFT_REDUCE_READONLY 1UL
+#define NFT_REDUCE_READONLY (void *)__NFT_REDUCE_READONLY
+
+static inline bool nft_reduce_is_readonly(const struct nft_expr *expr)
+{
+ return expr->ops->reduce == NFT_REDUCE_READONLY;
+}
+
+void nft_reg_track_update(struct nft_regs_track *track,
+ const struct nft_expr *expr, u8 dreg, u8 len);
+void nft_reg_track_cancel(struct nft_regs_track *track, u8 dreg, u8 len);
+void __nft_reg_track_cancel(struct nft_regs_track *track, u8 dreg);
+
+static inline bool nft_reg_track_cmp(struct nft_regs_track *track,
+ const struct nft_expr *expr, u8 dreg)
+{
+ return track->regs[dreg].selector &&
+ track->regs[dreg].selector->ops == expr->ops &&
+ track->regs[dreg].num_reg == 0;
+}
+
+#endif /* _NET_NF_TABLES_H */
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-10 02:29:33 +0000