android_kernel_motorola_sm6225/include/net/flow.h
Thomas Graf 47dcf0cb10 [NET]: Rethink mark field in struct flowi
Now that all protocols have been made aware of the mark
field it can be moved out of the union thus simplyfing
its usage.

The config options in the IPv4/IPv6/DECnet subsystems
to enable respectively disable mark based routing only
obfuscate the code with ifdefs, the cost for the
additional comparison in the flow key is insignificant,
and most distributions have all these options enabled
by default anyway. Therefore it makes sense to remove
the config options and enable mark based routing by
default.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-12-02 21:21:39 -08:00

100 lines
1.8 KiB
C

/*
*
* Generic internet FLOW.
*
*/
#ifndef _NET_FLOW_H
#define _NET_FLOW_H
#include <linux/in6.h>
#include <asm/atomic.h>
struct flowi {
int oif;
int iif;
__u32 mark;
union {
struct {
__be32 daddr;
__be32 saddr;
__u8 tos;
__u8 scope;
} ip4_u;
struct {
struct in6_addr daddr;
struct in6_addr saddr;
__be32 flowlabel;
} ip6_u;
struct {
__le16 daddr;
__le16 saddr;
__u8 scope;
} dn_u;
} nl_u;
#define fld_dst nl_u.dn_u.daddr
#define fld_src nl_u.dn_u.saddr
#define fld_scope nl_u.dn_u.scope
#define fl6_dst nl_u.ip6_u.daddr
#define fl6_src nl_u.ip6_u.saddr
#define fl6_flowlabel nl_u.ip6_u.flowlabel
#define fl4_dst nl_u.ip4_u.daddr
#define fl4_src nl_u.ip4_u.saddr
#define fl4_tos nl_u.ip4_u.tos
#define fl4_scope nl_u.ip4_u.scope
__u8 proto;
__u8 flags;
#define FLOWI_FLAG_MULTIPATHOLDROUTE 0x01
union {
struct {
__be16 sport;
__be16 dport;
} ports;
struct {
__u8 type;
__u8 code;
} icmpt;
struct {
__le16 sport;
__le16 dport;
} dnports;
__be32 spi;
#ifdef CONFIG_IPV6_MIP6
struct {
__u8 type;
} mht;
#endif
} uli_u;
#define fl_ip_sport uli_u.ports.sport
#define fl_ip_dport uli_u.ports.dport
#define fl_icmp_type uli_u.icmpt.type
#define fl_icmp_code uli_u.icmpt.code
#define fl_ipsec_spi uli_u.spi
#ifdef CONFIG_IPV6_MIP6
#define fl_mh_type uli_u.mht.type
#endif
__u32 secid; /* used by xfrm; see secid.txt */
} __attribute__((__aligned__(BITS_PER_LONG/8)));
#define FLOW_DIR_IN 0
#define FLOW_DIR_OUT 1
#define FLOW_DIR_FWD 2
struct sock;
typedef int (*flow_resolve_t)(struct flowi *key, u16 family, u8 dir,
void **objp, atomic_t **obj_refp);
extern void *flow_cache_lookup(struct flowi *key, u16 family, u8 dir,
flow_resolve_t resolver);
extern void flow_cache_flush(void);
extern atomic_t flow_cache_genid;
#endif