[linux-2.6-block.git] / include / net / flow_dissector.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _NET_FLOW_DISSECTOR_H
#define _NET_FLOW_DISSECTOR_H

#include <linux/types.h>
#include <linux/in6.h>
#include <linux/siphash.h>
#include <linux/string.h>
#include <uapi/linux/if_ether.h>

struct bpf_prog;
struct net;
struct sk_buff;

/**
 * struct flow_dissector_key_control:
 * @thoff: Transport header offset
 */
struct flow_dissector_key_control {
	u16	thoff;
	u16	addr_type;
	u32	flags;
};

#define FLOW_DIS_IS_FRAGMENT	BIT(0)
#define FLOW_DIS_FIRST_FRAG	BIT(1)
#define FLOW_DIS_ENCAPSULATION	BIT(2)

enum flow_dissect_ret {
	FLOW_DISSECT_RET_OUT_GOOD,
	FLOW_DISSECT_RET_OUT_BAD,
	FLOW_DISSECT_RET_PROTO_AGAIN,
	FLOW_DISSECT_RET_IPPROTO_AGAIN,
	FLOW_DISSECT_RET_CONTINUE,
};

/**
 * struct flow_dissector_key_basic:
 * @n_proto: Network header protocol (eg. IPv4/IPv6)
 * @ip_proto: Transport header protocol (eg. TCP/UDP)
 */
struct flow_dissector_key_basic {
	__be16	n_proto;
	u8	ip_proto;
	u8	padding;
};

struct flow_dissector_key_tags {
	u32	flow_label;
};

struct flow_dissector_key_vlan {
	union {
		struct {
			u16	vlan_id:12,
				vlan_dei:1,
				vlan_priority:3;
		};
		__be16	vlan_tci;
	};
	__be16	vlan_tpid;
};

struct flow_dissector_mpls_lse {
	u32	mpls_ttl:8,
		mpls_bos:1,
		mpls_tc:3,
		mpls_label:20;
};

#define FLOW_DIS_MPLS_MAX 7
struct flow_dissector_key_mpls {
	struct flow_dissector_mpls_lse ls[FLOW_DIS_MPLS_MAX]; /* Label Stack */
	u8 used_lses; /* One bit set for each Label Stack Entry in use */
};

static inline void dissector_set_mpls_lse(struct flow_dissector_key_mpls *mpls,
					  int lse_index)
{
	mpls->used_lses |= 1 << lse_index;
}

#define FLOW_DIS_TUN_OPTS_MAX 255
/**
 * struct flow_dissector_key_enc_opts:
 * @data: tunnel option data
 * @len: length of tunnel option data
 * @dst_opt_type: tunnel option type
 */
struct flow_dissector_key_enc_opts {
	u8 data[FLOW_DIS_TUN_OPTS_MAX];	/* Using IP_TUNNEL_OPTS_MAX is desired
					 * here but seems difficult to #include
					 */
	u8 len;
	__be16 dst_opt_type;
};

struct flow_dissector_key_keyid {
	__be32	keyid;
};

/**
 * struct flow_dissector_key_ipv4_addrs:
 * @src: source ip address
 * @dst: destination ip address
 */
struct flow_dissector_key_ipv4_addrs {
	/* (src,dst) must be grouped, in the same way than in IP header */
	__be32 src;
	__be32 dst;
};

/**
 * struct flow_dissector_key_ipv6_addrs:
 * @src: source ip address
 * @dst: destination ip address
 */
struct flow_dissector_key_ipv6_addrs {
	/* (src,dst) must be grouped, in the same way than in IP header */
	struct in6_addr src;
	struct in6_addr dst;
};

/**
 * struct flow_dissector_key_tipc:
 * @key: source node address combined with selector
 */
struct flow_dissector_key_tipc {
	__be32 key;
};

/**
 * struct flow_dissector_key_addrs:
 * @v4addrs: IPv4 addresses
 * @v6addrs: IPv6 addresses
 */
struct flow_dissector_key_addrs {
	union {
		struct flow_dissector_key_ipv4_addrs v4addrs;
		struct flow_dissector_key_ipv6_addrs v6addrs;
		struct flow_dissector_key_tipc tipckey;
	};
};

/**
 * flow_dissector_key_arp:
 *	@ports: Operation, source and target addresses for an ARP header
 *              for Ethernet hardware addresses and IPv4 protocol addresses
 *		sip: Sender IP address
 *		tip: Target IP address
 *		op:  Operation
 *		sha: Sender hardware address
 *		tpa: Target hardware address
 */
struct flow_dissector_key_arp {
	__u32 sip;
	__u32 tip;
	__u8 op;
	unsigned char sha[ETH_ALEN];
	unsigned char tha[ETH_ALEN];
};

/**
 * flow_dissector_key_tp_ports:
 *	@ports: port numbers of Transport header
 *		src: source port number
 *		dst: destination port number
 */
struct flow_dissector_key_ports {
	union {
		__be32 ports;
		struct {
			__be16 src;
			__be16 dst;
		};
	};
};

/**
 * flow_dissector_key_icmp:
 *		type: ICMP type
 *		code: ICMP code
 *		id:   session identifier
 */
struct flow_dissector_key_icmp {
	struct {
		u8 type;
		u8 code;
	};
	u16 id;
};

/**
 * struct flow_dissector_key_eth_addrs:
 * @src: source Ethernet address
 * @dst: destination Ethernet address
 */
struct flow_dissector_key_eth_addrs {
	/* (dst,src) must be grouped, in the same way than in ETH header */
	unsigned char dst[ETH_ALEN];
	unsigned char src[ETH_ALEN];
};

/**
 * struct flow_dissector_key_tcp:
 * @flags: flags
 */
struct flow_dissector_key_tcp {
	__be16 flags;
};

/**
 * struct flow_dissector_key_ip:
 * @tos: tos
 * @ttl: ttl
 */
struct flow_dissector_key_ip {
	__u8	tos;
	__u8	ttl;
};

/**
 * struct flow_dissector_key_meta:
 * @ingress_ifindex: ingress ifindex
 * @ingress_iftype: ingress interface type
 */
struct flow_dissector_key_meta {
	int ingress_ifindex;
	u16 ingress_iftype;
};

/**
 * struct flow_dissector_key_ct:
 * @ct_state: conntrack state after converting with map
 * @ct_mark: conttrack mark
 * @ct_zone: conntrack zone
 * @ct_labels: conntrack labels
 */
struct flow_dissector_key_ct {
	u16	ct_state;
	u16	ct_zone;
	u32	ct_mark;
	u32	ct_labels[4];
};

/**
 * struct flow_dissector_key_hash:
 * @hash: hash value
 */
struct flow_dissector_key_hash {
	u32 hash;
};

enum flow_dissector_key_id {
	FLOW_DISSECTOR_KEY_CONTROL, /* struct flow_dissector_key_control */
	FLOW_DISSECTOR_KEY_BASIC, /* struct flow_dissector_key_basic */
	FLOW_DISSECTOR_KEY_IPV4_ADDRS, /* struct flow_dissector_key_ipv4_addrs */
	FLOW_DISSECTOR_KEY_IPV6_ADDRS, /* struct flow_dissector_key_ipv6_addrs */
	FLOW_DISSECTOR_KEY_PORTS, /* struct flow_dissector_key_ports */
	FLOW_DISSECTOR_KEY_PORTS_RANGE, /* struct flow_dissector_key_ports */
	FLOW_DISSECTOR_KEY_ICMP, /* struct flow_dissector_key_icmp */
	FLOW_DISSECTOR_KEY_ETH_ADDRS, /* struct flow_dissector_key_eth_addrs */
	FLOW_DISSECTOR_KEY_TIPC, /* struct flow_dissector_key_tipc */
	FLOW_DISSECTOR_KEY_ARP, /* struct flow_dissector_key_arp */
	FLOW_DISSECTOR_KEY_VLAN, /* struct flow_dissector_key_vlan */
	FLOW_DISSECTOR_KEY_FLOW_LABEL, /* struct flow_dissector_key_tags */
	FLOW_DISSECTOR_KEY_GRE_KEYID, /* struct flow_dissector_key_keyid */
	FLOW_DISSECTOR_KEY_MPLS_ENTROPY, /* struct flow_dissector_key_keyid */
	FLOW_DISSECTOR_KEY_ENC_KEYID, /* struct flow_dissector_key_keyid */
	FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, /* struct flow_dissector_key_ipv4_addrs */
	FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, /* struct flow_dissector_key_ipv6_addrs */
	FLOW_DISSECTOR_KEY_ENC_CONTROL, /* struct flow_dissector_key_control */
	FLOW_DISSECTOR_KEY_ENC_PORTS, /* struct flow_dissector_key_ports */
	FLOW_DISSECTOR_KEY_MPLS, /* struct flow_dissector_key_mpls */
	FLOW_DISSECTOR_KEY_TCP, /* struct flow_dissector_key_tcp */
	FLOW_DISSECTOR_KEY_IP, /* struct flow_dissector_key_ip */
	FLOW_DISSECTOR_KEY_CVLAN, /* struct flow_dissector_key_vlan */
	FLOW_DISSECTOR_KEY_ENC_IP, /* struct flow_dissector_key_ip */
	FLOW_DISSECTOR_KEY_ENC_OPTS, /* struct flow_dissector_key_enc_opts */
	FLOW_DISSECTOR_KEY_META, /* struct flow_dissector_key_meta */
	FLOW_DISSECTOR_KEY_CT, /* struct flow_dissector_key_ct */
	FLOW_DISSECTOR_KEY_HASH, /* struct flow_dissector_key_hash */

	FLOW_DISSECTOR_KEY_MAX,
};

#define FLOW_DISSECTOR_F_PARSE_1ST_FRAG		BIT(0)
#define FLOW_DISSECTOR_F_STOP_AT_FLOW_LABEL	BIT(1)
#define FLOW_DISSECTOR_F_STOP_AT_ENCAP		BIT(2)
#define FLOW_DISSECTOR_F_STOP_BEFORE_ENCAP	BIT(3)

struct flow_dissector_key {
	enum flow_dissector_key_id key_id;
	size_t offset; /* offset of struct flow_dissector_key_*
			  in target the struct */
};

struct flow_dissector {
	unsigned int used_keys; /* each bit repesents presence of one key id */
	unsigned short int offset[FLOW_DISSECTOR_KEY_MAX];
};

struct flow_keys_basic {
	struct flow_dissector_key_control control;
	struct flow_dissector_key_basic basic;
};

struct flow_keys {
	struct flow_dissector_key_control control;
#define FLOW_KEYS_HASH_START_FIELD basic
	struct flow_dissector_key_basic basic __aligned(SIPHASH_ALIGNMENT);
	struct flow_dissector_key_tags tags;
	struct flow_dissector_key_vlan vlan;
	struct flow_dissector_key_vlan cvlan;
	struct flow_dissector_key_keyid keyid;
	struct flow_dissector_key_ports ports;
	struct flow_dissector_key_icmp icmp;
	/* 'addrs' must be the last member */
	struct flow_dissector_key_addrs addrs;
};

#define FLOW_KEYS_HASH_OFFSET		\
	offsetof(struct flow_keys, FLOW_KEYS_HASH_START_FIELD)

__be32 flow_get_u32_src(const struct flow_keys *flow);
__be32 flow_get_u32_dst(const struct flow_keys *flow);

extern struct flow_dissector flow_keys_dissector;
extern struct flow_dissector flow_keys_basic_dissector;

/* struct flow_keys_digest:
 *
 * This structure is used to hold a digest of the full flow keys. This is a
 * larger "hash" of a flow to allow definitively matching specific flows where
 * the 32 bit skb->hash is not large enough. The size is limited to 16 bytes so
 * that it can be used in CB of skb (see sch_choke for an example).
 */
#define FLOW_KEYS_DIGEST_LEN	16
struct flow_keys_digest {
	u8	data[FLOW_KEYS_DIGEST_LEN];
};

void make_flow_keys_digest(struct flow_keys_digest *digest,
			   const struct flow_keys *flow);

static inline bool flow_keys_have_l4(const struct flow_keys *keys)
{
	return (keys->ports.ports || keys->tags.flow_label);
}

u32 flow_hash_from_keys(struct flow_keys *keys);
void skb_flow_get_icmp_tci(const struct sk_buff *skb,
			   struct flow_dissector_key_icmp *key_icmp,
			   const void *data, int thoff, int hlen);

static inline bool dissector_uses_key(const struct flow_dissector *flow_dissector,
				      enum flow_dissector_key_id key_id)
{
	return flow_dissector->used_keys & (1 << key_id);
}

static inline void *skb_flow_dissector_target(struct flow_dissector *flow_dissector,
					      enum flow_dissector_key_id key_id,
					      void *target_container)
{
	return ((char *)target_container) + flow_dissector->offset[key_id];
}

struct bpf_flow_dissector {
	struct bpf_flow_keys	*flow_keys;
	const struct sk_buff	*skb;
	const void		*data;
	const void		*data_end;
};

static inline void
flow_dissector_init_keys(struct flow_dissector_key_control *key_control,
			 struct flow_dissector_key_basic *key_basic)
{
	memset(key_control, 0, sizeof(*key_control));
	memset(key_basic, 0, sizeof(*key_basic));
}

#ifdef CONFIG_BPF_SYSCALL
int flow_dissector_bpf_prog_attach_check(struct net *net,
					 struct bpf_prog *prog);
#endif /* CONFIG_BPF_SYSCALL */

#endif
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1bd758eb JP	2	#ifndef _NET_FLOW_DISSECTOR_H
1bd758eb JP	3	#define _NET_FLOW_DISSECTOR_H
0744dd00	4
c3f8eaeb	5	#include <linux/types.h>
b924933c	6	#include <linux/in6.h>
55667441	7	#include <linux/siphash.h>
8a9093c7	8	#include <linux/string.h>
67a900cc	9	#include <uapi/linux/if_ether.h>
c3f8eaeb	10
b27f7bb5 JS	11	struct bpf_prog;
b27f7bb5 JS	12	struct net;
5dec597e MC	13	struct sk_buff;
5dec597e MC	14
42aecaa9 TH	15	/**
	16	* struct flow_dissector_key_control:
	17	* @thoff: Transport header offset
	18	*/
	19	struct flow_dissector_key_control {
	20	u16 thoff;
c3f83241	21	u16 addr_type;
4b36993d	22	u32 flags;
42aecaa9 TH	23	};
42aecaa9 TH	24
4b36993d DM	25	#define FLOW_DIS_IS_FRAGMENT BIT(0)
	26	#define FLOW_DIS_FIRST_FRAG BIT(1)
	27	#define FLOW_DIS_ENCAPSULATION BIT(2)
	28
3a1214e8 TH	29	enum flow_dissect_ret {
	30	FLOW_DISSECT_RET_OUT_GOOD,
	31	FLOW_DISSECT_RET_OUT_BAD,
	32	FLOW_DISSECT_RET_PROTO_AGAIN,
	33	FLOW_DISSECT_RET_IPPROTO_AGAIN,
	34	FLOW_DISSECT_RET_CONTINUE,
	35	};
	36
fbff949e JP	37	/**
fbff949e JP	38	* struct flow_dissector_key_basic:
fbff949e JP	39	* @n_proto: Network header protocol (eg. IPv4/IPv6)
	40	* @ip_proto: Transport header protocol (eg. TCP/UDP)
	41	*/
	42	struct flow_dissector_key_basic {
fbff949e JP	43	__be16 n_proto;
fbff949e JP	44	u8 ip_proto;
42aecaa9	45	u8 padding;
fbff949e JP	46	};
fbff949e JP	47
d34af823	48	struct flow_dissector_key_tags {
f6a66927 HHZ	49	u32 flow_label;
	50	};
	51
	52	struct flow_dissector_key_vlan {
a82055af	53	union {
d1746d1e PM	54	struct {
	55	u16 vlan_id:12,
	56	vlan_dei:1,
	57	vlan_priority:3;
	58	};
a82055af PNA	59	__be16 vlan_tci;
a82055af PNA	60	};
2064c3d4	61	__be16 vlan_tpid;
d34af823 TH	62	};
d34af823 TH	63
58cff782	64	struct flow_dissector_mpls_lse {
029c1ecb BL	65	u32 mpls_ttl:8,
	66	mpls_bos:1,
	67	mpls_tc:3,
	68	mpls_label:20;
	69	};
	70
58cff782 GN	71	#define FLOW_DIS_MPLS_MAX 7
	72	struct flow_dissector_key_mpls {
	73	struct flow_dissector_mpls_lse ls[FLOW_DIS_MPLS_MAX]; /* Label Stack */
	74	u8 used_lses; /* One bit set for each Label Stack Entry in use */
	75	};
	76
	77	static inline void dissector_set_mpls_lse(struct flow_dissector_key_mpls *mpls,
	78	int lse_index)
	79	{
	80	mpls->used_lses \|= 1 << lse_index;
	81	}
	82
92e2c405 SH	83	#define FLOW_DIS_TUN_OPTS_MAX 255
	84	/**
	85	* struct flow_dissector_key_enc_opts:
	86	* @data: tunnel option data
	87	* @len: length of tunnel option data
	88	* @dst_opt_type: tunnel option type
	89	*/
	90	struct flow_dissector_key_enc_opts {
	91	u8 data[FLOW_DIS_TUN_OPTS_MAX]; /* Using IP_TUNNEL_OPTS_MAX is desired
	92	* here but seems difficult to #include
	93	*/
	94	u8 len;
	95	__be16 dst_opt_type;
	96	};
	97
1fdd512c TH	98	struct flow_dissector_key_keyid {
	99	__be32 keyid;
	100	};
	101
fbff949e	102	/**
c3f83241 TH	103	* struct flow_dissector_key_ipv4_addrs:
	104	* @src: source ip address
	105	* @dst: destination ip address
fbff949e	106	*/
c3f83241	107	struct flow_dissector_key_ipv4_addrs {
fbff949e JP	108	/* (src,dst) must be grouped, in the same way than in IP header */
	109	__be32 src;
	110	__be32 dst;
	111	};
	112
c3f83241 TH	113	/**
	114	* struct flow_dissector_key_ipv6_addrs:
	115	* @src: source ip address
	116	* @dst: destination ip address
	117	*/
	118	struct flow_dissector_key_ipv6_addrs {
	119	/* (src,dst) must be grouped, in the same way than in IP header */
	120	struct in6_addr src;
	121	struct in6_addr dst;
	122	};
	123
9f249089	124	/**
8d6e79d3 JM	125	* struct flow_dissector_key_tipc:
8d6e79d3 JM	126	* @key: source node address combined with selector
9f249089	127	*/
8d6e79d3 JM	128	struct flow_dissector_key_tipc {
8d6e79d3 JM	129	__be32 key;
9f249089 TH	130	};
9f249089 TH	131
c3f83241 TH	132	/**
	133	* struct flow_dissector_key_addrs:
	134	* @v4addrs: IPv4 addresses
	135	* @v6addrs: IPv6 addresses
	136	*/
	137	struct flow_dissector_key_addrs {
	138	union {
	139	struct flow_dissector_key_ipv4_addrs v4addrs;
	140	struct flow_dissector_key_ipv6_addrs v6addrs;
8d6e79d3	141	struct flow_dissector_key_tipc tipckey;
c3f83241 TH	142	};
	143	};
	144
55733350 SH	145	/**
	146	* flow_dissector_key_arp:
	147	* @ports: Operation, source and target addresses for an ARP header
	148	* for Ethernet hardware addresses and IPv4 protocol addresses
	149	* sip: Sender IP address
	150	* tip: Target IP address
	151	* op: Operation
	152	* sha: Sender hardware address
	153	* tpa: Target hardware address
	154	*/
	155	struct flow_dissector_key_arp {
	156	__u32 sip;
	157	__u32 tip;
	158	__u8 op;
	159	unsigned char sha[ETH_ALEN];
	160	unsigned char tha[ETH_ALEN];
	161	};
	162
fbff949e JP	163	/**
	164	* flow_dissector_key_tp_ports:
	165	* @ports: port numbers of Transport header
59346afe JP	166	* src: source port number
59346afe JP	167	* dst: destination port number
fbff949e JP	168	*/
	169	struct flow_dissector_key_ports {
	170	union {
	171	__be32 ports;
59346afe JP	172	struct {
	173	__be16 src;
	174	__be16 dst;
	175	};
fbff949e JP	176	};
	177	};
	178
972d3876 SH	179	/**
972d3876 SH	180	* flow_dissector_key_icmp:
972d3876 SH	181	* type: ICMP type
972d3876 SH	182	* code: ICMP code
5dec597e	183	* id: session identifier
972d3876 SH	184	*/
972d3876 SH	185	struct flow_dissector_key_icmp {
5dec597e MC	186	struct {
	187	u8 type;
	188	u8 code;
972d3876	189	};
5dec597e	190	u16 id;
972d3876	191	};
b924933c	192
67a900cc JP	193	/**
	194	* struct flow_dissector_key_eth_addrs:
	195	* @src: source Ethernet address
	196	* @dst: destination Ethernet address
	197	*/
	198	struct flow_dissector_key_eth_addrs {
	199	/* (dst,src) must be grouped, in the same way than in ETH header */
	200	unsigned char dst[ETH_ALEN];
	201	unsigned char src[ETH_ALEN];
	202	};
	203
ac4bb5de JP	204	/**
	205	* struct flow_dissector_key_tcp:
	206	* @flags: flags
	207	*/
	208	struct flow_dissector_key_tcp {
	209	__be16 flags;
	210	};
	211
518d8a2e OG	212	/**
	213	* struct flow_dissector_key_ip:
	214	* @tos: tos
	215	* @ttl: ttl
	216	*/
	217	struct flow_dissector_key_ip {
	218	__u8 tos;
	219	__u8 ttl;
	220	};
	221
82828b88 JP	222	/**
	223	* struct flow_dissector_key_meta:
	224	* @ingress_ifindex: ingress ifindex
8819efc9	225	* @ingress_iftype: ingress interface type
82828b88 JP	226	*/
	227	struct flow_dissector_key_meta {
	228	int ingress_ifindex;
8819efc9	229	u16 ingress_iftype;
82828b88 JP	230	};
82828b88 JP	231
75a56758 PB	232	/**
	233	* struct flow_dissector_key_ct:
	234	* @ct_state: conntrack state after converting with map
	235	* @ct_mark: conttrack mark
	236	* @ct_zone: conntrack zone
	237	* @ct_labels: conntrack labels
	238	*/
	239	struct flow_dissector_key_ct {
	240	u16 ct_state;
	241	u16 ct_zone;
	242	u32 ct_mark;
	243	u32 ct_labels[4];
	244	};
	245
0cb09aff AL	246	/**
	247	* struct flow_dissector_key_hash:
	248	* @hash: hash value
	249	*/
	250	struct flow_dissector_key_hash {
	251	u32 hash;
	252	};
	253
fbff949e	254	enum flow_dissector_key_id {
42aecaa9	255	FLOW_DISSECTOR_KEY_CONTROL, /* struct flow_dissector_key_control */
fbff949e	256	FLOW_DISSECTOR_KEY_BASIC, /* struct flow_dissector_key_basic */
c3f83241 TH	257	FLOW_DISSECTOR_KEY_IPV4_ADDRS, /* struct flow_dissector_key_ipv4_addrs */
c3f83241 TH	258	FLOW_DISSECTOR_KEY_IPV6_ADDRS, /* struct flow_dissector_key_ipv6_addrs */
fbff949e	259	FLOW_DISSECTOR_KEY_PORTS, /* struct flow_dissector_key_ports */
8ffb055b	260	FLOW_DISSECTOR_KEY_PORTS_RANGE, /* struct flow_dissector_key_ports */
972d3876	261	FLOW_DISSECTOR_KEY_ICMP, /* struct flow_dissector_key_icmp */
67a900cc	262	FLOW_DISSECTOR_KEY_ETH_ADDRS, /* struct flow_dissector_key_eth_addrs */
8d6e79d3	263	FLOW_DISSECTOR_KEY_TIPC, /* struct flow_dissector_key_tipc */
55733350	264	FLOW_DISSECTOR_KEY_ARP, /* struct flow_dissector_key_arp */
91c45956 EC	265	FLOW_DISSECTOR_KEY_VLAN, /* struct flow_dissector_key_vlan */
91c45956 EC	266	FLOW_DISSECTOR_KEY_FLOW_LABEL, /* struct flow_dissector_key_tags */
1fdd512c	267	FLOW_DISSECTOR_KEY_GRE_KEYID, /* struct flow_dissector_key_keyid */
b3baa0fb	268	FLOW_DISSECTOR_KEY_MPLS_ENTROPY, /* struct flow_dissector_key_keyid */
9ba6a9a9 HHZ	269	FLOW_DISSECTOR_KEY_ENC_KEYID, /* struct flow_dissector_key_keyid */
	270	FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, /* struct flow_dissector_key_ipv4_addrs */
	271	FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, /* struct flow_dissector_key_ipv6_addrs */
	272	FLOW_DISSECTOR_KEY_ENC_CONTROL, /* struct flow_dissector_key_control */
f4d997fd	273	FLOW_DISSECTOR_KEY_ENC_PORTS, /* struct flow_dissector_key_ports */
029c1ecb	274	FLOW_DISSECTOR_KEY_MPLS, /* struct flow_dissector_key_mpls */
ac4bb5de	275	FLOW_DISSECTOR_KEY_TCP, /* struct flow_dissector_key_tcp */
518d8a2e	276	FLOW_DISSECTOR_KEY_IP, /* struct flow_dissector_key_ip */
91c45956	277	FLOW_DISSECTOR_KEY_CVLAN, /* struct flow_dissector_key_vlan */
5544adb9	278	FLOW_DISSECTOR_KEY_ENC_IP, /* struct flow_dissector_key_ip */
92e2c405	279	FLOW_DISSECTOR_KEY_ENC_OPTS, /* struct flow_dissector_key_enc_opts */
82828b88	280	FLOW_DISSECTOR_KEY_META, /* struct flow_dissector_key_meta */
75a56758	281	FLOW_DISSECTOR_KEY_CT, /* struct flow_dissector_key_ct */
0cb09aff	282	FLOW_DISSECTOR_KEY_HASH, /* struct flow_dissector_key_hash */
92e2c405	283
fbff949e JP	284	FLOW_DISSECTOR_KEY_MAX,
	285	};
	286
807e165d	287	#define FLOW_DISSECTOR_F_PARSE_1ST_FRAG BIT(0)
1cc26450 SF	288	#define FLOW_DISSECTOR_F_STOP_AT_FLOW_LABEL BIT(1)
1cc26450 SF	289	#define FLOW_DISSECTOR_F_STOP_AT_ENCAP BIT(2)
6de6e46d	290	#define FLOW_DISSECTOR_F_STOP_BEFORE_ENCAP BIT(3)
807e165d	291
fbff949e JP	292	struct flow_dissector_key {
	293	enum flow_dissector_key_id key_id;
	294	size_t offset; /* offset of struct flow_dissector_key_*
	295	in target the struct */
	296	};
	297
	298	struct flow_dissector {
	299	unsigned int used_keys; /* each bit repesents presence of one key id */
	300	unsigned short int offset[FLOW_DISSECTOR_KEY_MAX];
	301	};
	302
72a338bc PA	303	struct flow_keys_basic {
	304	struct flow_dissector_key_control control;
	305	struct flow_dissector_key_basic basic;
	306	};
	307
06635a35	308	struct flow_keys {
42aecaa9 TH	309	struct flow_dissector_key_control control;
42aecaa9 TH	310	#define FLOW_KEYS_HASH_START_FIELD basic
55667441	311	struct flow_dissector_key_basic basic __aligned(SIPHASH_ALIGNMENT);
d34af823	312	struct flow_dissector_key_tags tags;
f6a66927	313	struct flow_dissector_key_vlan vlan;
24c590e3	314	struct flow_dissector_key_vlan cvlan;
1fdd512c	315	struct flow_dissector_key_keyid keyid;
42aecaa9	316	struct flow_dissector_key_ports ports;
5dec597e	317	struct flow_dissector_key_icmp icmp;
98298e6c	318	/* 'addrs' must be the last member */
42aecaa9	319	struct flow_dissector_key_addrs addrs;
06635a35 JP	320	};
06635a35 JP	321
42aecaa9 TH	322	#define FLOW_KEYS_HASH_OFFSET \
	323	offsetof(struct flow_keys, FLOW_KEYS_HASH_START_FIELD)
	324
c3f83241 TH	325	__be32 flow_get_u32_src(const struct flow_keys *flow);
	326	__be32 flow_get_u32_dst(const struct flow_keys *flow);
	327
06635a35	328	extern struct flow_dissector flow_keys_dissector;
72a338bc	329	extern struct flow_dissector flow_keys_basic_dissector;
06635a35	330
2f59e1eb TH	331	/* struct flow_keys_digest:
	332	*
	333	* This structure is used to hold a digest of the full flow keys. This is a
	334	* larger "hash" of a flow to allow definitively matching specific flows where
	335	* the 32 bit skb->hash is not large enough. The size is limited to 16 bytes so
53bc017f	336	* that it can be used in CB of skb (see sch_choke for an example).
2f59e1eb TH	337	*/
	338	#define FLOW_KEYS_DIGEST_LEN 16
	339	struct flow_keys_digest {
	340	u8 data[FLOW_KEYS_DIGEST_LEN];
	341	};
	342
	343	void make_flow_keys_digest(struct flow_keys_digest *digest,
	344	const struct flow_keys *flow);
	345
66fdd05e	346	static inline bool flow_keys_have_l4(const struct flow_keys *keys)
bcc83839 TH	347	{
	348	return (keys->ports.ports \|\| keys->tags.flow_label);
	349	}
	350
c6cc1ca7	351	u32 flow_hash_from_keys(struct flow_keys *keys);
5dec597e MC	352	void skb_flow_get_icmp_tci(const struct sk_buff *skb,
5dec597e MC	353	struct flow_dissector_key_icmp *key_icmp,
f96533cd	354	const void *data, int thoff, int hlen);
c6cc1ca7	355
8de2d793 AV	356	static inline bool dissector_uses_key(const struct flow_dissector *flow_dissector,
	357	enum flow_dissector_key_id key_id)
	358	{
	359	return flow_dissector->used_keys & (1 << key_id);
	360	}
	361
	362	static inline void skb_flow_dissector_target(struct flow_dissector flow_dissector,
	363	enum flow_dissector_key_id key_id,
	364	void *target_container)
	365	{
	366	return ((char *)target_container) + flow_dissector->offset[key_id];
	367	}
	368
089b19a9 SF	369	struct bpf_flow_dissector {
	370	struct bpf_flow_keys *flow_keys;
	371	const struct sk_buff *skb;
dac06b32 AL	372	const void *data;
dac06b32 AL	373	const void *data_end;
089b19a9 SF	374	};
089b19a9 SF	375
8a9093c7 JB	376	static inline void
	377	flow_dissector_init_keys(struct flow_dissector_key_control *key_control,
	378	struct flow_dissector_key_basic *key_basic)
	379	{
	380	memset(key_control, 0, sizeof(*key_control));
	381	memset(key_basic, 0, sizeof(*key_basic));
	382	}
	383
b27f7bb5	384	#ifdef CONFIG_BPF_SYSCALL
3b701699 JS	385	int flow_dissector_bpf_prog_attach_check(struct net *net,
3b701699 JS	386	struct bpf_prog *prog);
b27f7bb5 JS	387	#endif /* CONFIG_BPF_SYSCALL */
b27f7bb5 JS	388
0744dd00	389	#endif