diff options
Diffstat (limited to 'include/net/flow.h')
| -rw-r--r-- | include/net/flow.h | 67 |
1 files changed, 55 insertions, 12 deletions
diff --git a/include/net/flow.h b/include/net/flow.h index 78113daadd6..8109a159d1b 100644 --- a/include/net/flow.h +++ b/include/net/flow.h @@ -7,9 +7,18 @@ #ifndef _NET_FLOW_H #define _NET_FLOW_H +#include <linux/socket.h> #include <linux/in6.h> #include <linux/atomic.h> +/* + * ifindex generation is per-net namespace, and loopback is + * always the 1st device in ns (see net_dev_init), thus any + * loopback device should get ifindex 1 + */ + +#define LOOPBACK_IFINDEX 1 + struct flowi_common { int flowic_oif; int flowic_iif; @@ -19,8 +28,7 @@ struct flowi_common { __u8 flowic_proto; __u8 flowic_flags; #define FLOWI_FLAG_ANYSRC 0x01 -#define FLOWI_FLAG_PRECOW_METRICS 0x02 -#define FLOWI_FLAG_CAN_SLEEP 0x04 +#define FLOWI_FLAG_KNOWN_NH 0x02 __u32 flowic_secid; }; @@ -58,8 +66,11 @@ struct flowi4 { #define flowi4_proto __fl_common.flowic_proto #define flowi4_flags __fl_common.flowic_flags #define flowi4_secid __fl_common.flowic_secid - __be32 daddr; + + /* (saddr,daddr) must be grouped, same order as in IP header */ __be32 saddr; + __be32 daddr; + union flowi_uli uli; #define fl4_sport uli.ports.sport #define fl4_dport uli.ports.dport @@ -68,16 +79,16 @@ struct flowi4 { #define fl4_ipsec_spi uli.spi #define fl4_mh_type uli.mht.type #define fl4_gre_key uli.gre_key -}; +} __attribute__((__aligned__(BITS_PER_LONG/8))); static inline void flowi4_init_output(struct flowi4 *fl4, int oif, __u32 mark, __u8 tos, __u8 scope, __u8 proto, __u8 flags, __be32 daddr, __be32 saddr, - __be16 dport, __be32 sport) + __be16 dport, __be16 sport) { fl4->flowi4_oif = oif; - fl4->flowi4_iif = 0; + fl4->flowi4_iif = LOOPBACK_IFINDEX; fl4->flowi4_mark = mark; fl4->flowi4_tos = tos; fl4->flowi4_scope = scope; @@ -89,6 +100,16 @@ static inline void flowi4_init_output(struct flowi4 *fl4, int oif, fl4->fl4_dport = dport; fl4->fl4_sport = sport; } + +/* Reset some input parameters after previous lookup */ +static inline void flowi4_update_output(struct flowi4 *fl4, int oif, __u8 tos, + __be32 daddr, __be32 saddr) +{ + fl4->flowi4_oif = oif; + fl4->flowi4_tos = tos; + fl4->daddr = daddr; + fl4->saddr = saddr; +} struct flowi6 { @@ -112,7 +133,7 @@ struct flowi6 { #define fl6_ipsec_spi uli.spi #define fl6_mh_type uli.mht.type #define fl6_gre_key uli.gre_key -}; +} __attribute__((__aligned__(BITS_PER_LONG/8))); struct flowidn { struct flowi_common __fl_common; @@ -127,7 +148,7 @@ struct flowidn { union flowi_uli uli; #define fld_sport uli.ports.sport #define fld_dport uli.ports.dport -}; +} __attribute__((__aligned__(BITS_PER_LONG/8))); struct flowi { union { @@ -161,6 +182,24 @@ static inline struct flowi *flowidn_to_flowi(struct flowidn *fldn) return container_of(fldn, struct flowi, u.dn); } +typedef unsigned long flow_compare_t; + +static inline size_t flow_key_size(u16 family) +{ + switch (family) { + case AF_INET: + BUILD_BUG_ON(sizeof(struct flowi4) % sizeof(flow_compare_t)); + return sizeof(struct flowi4) / sizeof(flow_compare_t); + case AF_INET6: + BUILD_BUG_ON(sizeof(struct flowi6) % sizeof(flow_compare_t)); + return sizeof(struct flowi6) / sizeof(flow_compare_t); + case AF_DECnet: + BUILD_BUG_ON(sizeof(struct flowidn) % sizeof(flow_compare_t)); + return sizeof(struct flowidn) / sizeof(flow_compare_t); + } + return 0; +} + #define FLOW_DIR_IN 0 #define FLOW_DIR_OUT 1 #define FLOW_DIR_FWD 2 @@ -183,11 +222,15 @@ typedef struct flow_cache_object *(*flow_resolve_t)( struct net *net, const struct flowi *key, u16 family, u8 dir, struct flow_cache_object *oldobj, void *ctx); -extern struct flow_cache_object *flow_cache_lookup( - struct net *net, const struct flowi *key, u16 family, - u8 dir, flow_resolve_t resolver, void *ctx); +struct flow_cache_object *flow_cache_lookup(struct net *net, + const struct flowi *key, u16 family, + u8 dir, flow_resolve_t resolver, + void *ctx); +int flow_cache_init(struct net *net); +void flow_cache_fini(struct net *net); -extern void flow_cache_flush(void); +void flow_cache_flush(struct net *net); +void flow_cache_flush_deferred(struct net *net); extern atomic_t flow_cache_genid; #endif |