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| author | Tom Herbert <tom@herbertland.com> | 2015-09-01 19:24:25 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-09-02 01:06:22 +0300 |
| commit | c6cc1ca7f4d70cbb3ea3a5ca163c5dabaf155cdb (patch) | |
| tree | ba007b3db243d74a4dfc2d7dd9d48427b9a19419 /include | |
| parent | bcc83839ffdb063dd2b0370cd85c4f825761fc59 (diff) | |
| download | linux-c6cc1ca7f4d70cbb3ea3a5ca163c5dabaf155cdb.tar.xz | |
flowi: Abstract out functions to get flow hash based on flowi
Create __get_hash_from_flowi6 and __get_hash_from_flowi4 to get the
flow keys and hash based on flowi structures. These are called by
__skb_get_hash_flowi6 and __skb_get_hash_flowi4. Also, created
get_hash_from_flowi6 and get_hash_from_flowi4 which can be called
when just the hash value for a flowi is needed.
Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/skbuff.h | 16 | ||||
| -rw-r--r-- | include/net/flow.h | 19 | ||||
| -rw-r--r-- | include/net/flow_dissector.h | 2 |
3 files changed, 33 insertions, 4 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 5d2c812e725b..bbe41bccfc5f 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -1030,8 +1030,12 @@ __u32 __skb_get_hash_flowi6(struct sk_buff *skb, struct flowi6 *fl6); static inline __u32 skb_get_hash_flowi6(struct sk_buff *skb, struct flowi6 *fl6) { - if (!skb->l4_hash && !skb->sw_hash) - __skb_get_hash_flowi6(skb, fl6); + if (!skb->l4_hash && !skb->sw_hash) { + struct flow_keys keys; + + __skb_set_sw_hash(skb, __get_hash_from_flowi6(fl6, &keys), + flow_keys_have_l4(&keys)); + } return skb->hash; } @@ -1040,8 +1044,12 @@ __u32 __skb_get_hash_flowi4(struct sk_buff *skb, struct flowi4 *fl); static inline __u32 skb_get_hash_flowi4(struct sk_buff *skb, struct flowi4 *fl4) { - if (!skb->l4_hash && !skb->sw_hash) - __skb_get_hash_flowi4(skb, fl4); + if (!skb->l4_hash && !skb->sw_hash) { + struct flow_keys keys; + + __skb_set_sw_hash(skb, __get_hash_from_flowi4(fl4, &keys), + flow_keys_have_l4(&keys)); + } return skb->hash; } diff --git a/include/net/flow.h b/include/net/flow.h index 9e0297c4c11d..dafe97c3c048 100644 --- a/include/net/flow.h +++ b/include/net/flow.h @@ -10,6 +10,7 @@ #include <linux/socket.h> #include <linux/in6.h> #include <linux/atomic.h> +#include <net/flow_dissector.h> /* * ifindex generation is per-net namespace, and loopback is @@ -243,4 +244,22 @@ void flow_cache_flush(struct net *net); void flow_cache_flush_deferred(struct net *net); extern atomic_t flow_cache_genid; +__u32 __get_hash_from_flowi6(struct flowi6 *fl6, struct flow_keys *keys); + +static inline __u32 get_hash_from_flowi6(struct flowi6 *fl6) +{ + struct flow_keys keys; + + return __get_hash_from_flowi6(fl6, &keys); +} + +__u32 __get_hash_from_flowi4(struct flowi4 *fl4, struct flow_keys *keys); + +static inline __u32 get_hash_from_flowi4(struct flowi4 *fl4) +{ + struct flow_keys keys; + + return __get_hash_from_flowi4(fl4, &keys); +} + #endif diff --git a/include/net/flow_dissector.h b/include/net/flow_dissector.h index af76c496f7db..74fe160f0b05 100644 --- a/include/net/flow_dissector.h +++ b/include/net/flow_dissector.h @@ -172,4 +172,6 @@ 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 |