mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 01:10:04 +00:00
![David S. Miller](/assets/img/avatar_default.png)
Just have a flags member instead. In file included from include/linux/linkage.h:4:0, from include/linux/kernel.h:6, from net/core/flow_dissector.c:1: In function 'flow_keys_hash_start', inlined from 'flow_hash_from_keys' at net/core/flow_dissector.c:553:34: >> include/linux/compiler.h:447:38: error: call to '__compiletime_assert_459' declared with attribute error: BUILD_BUG_ON failed: FLOW_KEYS_HASH_OFFSET % sizeof(u32) Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
187 lines
4.8 KiB
C
187 lines
4.8 KiB
C
#ifndef _NET_FLOW_DISSECTOR_H
|
|
#define _NET_FLOW_DISSECTOR_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/in6.h>
|
|
#include <uapi/linux/if_ether.h>
|
|
|
|
/**
|
|
* 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)
|
|
|
|
/**
|
|
* struct flow_dissector_key_basic:
|
|
* @thoff: Transport header offset
|
|
* @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 vlan_id:12,
|
|
flow_label:20;
|
|
};
|
|
|
|
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_addrs:
|
|
* @srcnode: source node address
|
|
*/
|
|
struct flow_dissector_key_tipc_addrs {
|
|
__be32 srcnode;
|
|
};
|
|
|
|
/**
|
|
* 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_addrs tipcaddrs;
|
|
};
|
|
};
|
|
|
|
/**
|
|
* 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;
|
|
};
|
|
};
|
|
};
|
|
|
|
|
|
/**
|
|
* 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];
|
|
};
|
|
|
|
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_ETH_ADDRS, /* struct flow_dissector_key_eth_addrs */
|
|
FLOW_DISSECTOR_KEY_TIPC_ADDRS, /* struct flow_dissector_key_tipc_addrs */
|
|
FLOW_DISSECTOR_KEY_VLANID, /* struct flow_dissector_key_flow_tags */
|
|
FLOW_DISSECTOR_KEY_FLOW_LABEL, /* struct flow_dissector_key_flow_tags */
|
|
FLOW_DISSECTOR_KEY_GRE_KEYID, /* struct flow_dissector_key_keyid */
|
|
FLOW_DISSECTOR_KEY_MPLS_ENTROPY, /* struct flow_dissector_key_keyid */
|
|
|
|
FLOW_DISSECTOR_KEY_MAX,
|
|
};
|
|
|
|
#define FLOW_DISSECTOR_F_PARSE_1ST_FRAG BIT(0)
|
|
#define FLOW_DISSECTOR_F_STOP_AT_L3 BIT(1)
|
|
#define FLOW_DISSECTOR_F_STOP_AT_FLOW_LABEL BIT(2)
|
|
#define FLOW_DISSECTOR_F_STOP_AT_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 {
|
|
struct flow_dissector_key_control control;
|
|
#define FLOW_KEYS_HASH_START_FIELD basic
|
|
struct flow_dissector_key_basic basic;
|
|
struct flow_dissector_key_tags tags;
|
|
struct flow_dissector_key_keyid keyid;
|
|
struct flow_dissector_key_ports ports;
|
|
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_buf_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 by 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(struct flow_keys *keys)
|
|
{
|
|
return (keys->ports.ports || keys->tags.flow_label);
|
|
}
|
|
|
|
u32 flow_hash_from_keys(struct flow_keys *keys);
|
|
|
|
#endif
|