[linux-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 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_key_mpls {
	u32	mpls_ttl:8,
		mpls_bos:1,
		mpls_tc:3,
		mpls_label:20;
};

#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];
};

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_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)

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,
			   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;
	void			*data;
	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));
}

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