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authorTom Herbert <tom@herbertland.com>2015-09-01 19:24:25 +0300
committerDavid S. Miller <davem@davemloft.net>2015-09-02 01:06:22 +0300
commitc6cc1ca7f4d70cbb3ea3a5ca163c5dabaf155cdb (patch)
treeba007b3db243d74a4dfc2d7dd9d48427b9a19419 /include
parentbcc83839ffdb063dd2b0370cd85c4f825761fc59 (diff)
downloadlinux-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.h16
-rw-r--r--include/net/flow.h19
-rw-r--r--include/net/flow_dissector.h2
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