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Date: Tue, 1 Sep 2015 09:24:24 -0700
From: Tom Herbert <tom@...bertland.com>
To: <davem@...emloft.net>, <netdev@...r.kernel.org>
CC: <kernel-team@...com>
Subject: [PATCH net-next 02/11] skbuff: Make __skb_set_sw_hash a general function
Move __skb_set_sw_hash to skbuff.h and add __skb_set_hash which is
a common method (between __skb_set_sw_hash and skb_set_hash) to set
the hash in an skbuff.
Also, move skb_clear_hash to be closer to __skb_set_hash.
Signed-off-by: Tom Herbert <tom@...bertland.com>
---
include/linux/skbuff.h | 45 ++++++++++++++++++++++++++++----------------
include/net/flow_dissector.h | 5 +++++
net/core/flow_dissector.c | 18 ++++++------------
3 files changed, 40 insertions(+), 28 deletions(-)
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 8a697c6..5d2c812 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -937,14 +937,40 @@ enum pkt_hash_types {
PKT_HASH_TYPE_L4, /* Input: src_IP, dst_IP, src_port, dst_port */
};
-static inline void
-skb_set_hash(struct sk_buff *skb, __u32 hash, enum pkt_hash_types type)
+static inline void skb_clear_hash(struct sk_buff *skb)
{
- skb->l4_hash = (type == PKT_HASH_TYPE_L4);
+ skb->hash = 0;
skb->sw_hash = 0;
+ skb->l4_hash = 0;
+}
+
+static inline void skb_clear_hash_if_not_l4(struct sk_buff *skb)
+{
+ if (!skb->l4_hash)
+ skb_clear_hash(skb);
+}
+
+static inline void
+__skb_set_hash(struct sk_buff *skb, __u32 hash, bool is_sw, bool is_l4)
+{
+ skb->l4_hash = is_l4;
+ skb->sw_hash = is_sw;
skb->hash = hash;
}
+static inline void
+skb_set_hash(struct sk_buff *skb, __u32 hash, enum pkt_hash_types type)
+{
+ /* Used by drivers to set hash from HW */
+ __skb_set_hash(skb, hash, false, type == PKT_HASH_TYPE_L4);
+}
+
+static inline void
+__skb_set_sw_hash(struct sk_buff *skb, __u32 hash, bool is_l4)
+{
+ __skb_set_hash(skb, hash, true, is_l4);
+}
+
void __skb_get_hash(struct sk_buff *skb);
u32 skb_get_poff(const struct sk_buff *skb);
u32 __skb_get_poff(const struct sk_buff *skb, void *data,
@@ -1027,19 +1053,6 @@ static inline __u32 skb_get_hash_raw(const struct sk_buff *skb)
return skb->hash;
}
-static inline void skb_clear_hash(struct sk_buff *skb)
-{
- skb->hash = 0;
- skb->sw_hash = 0;
- skb->l4_hash = 0;
-}
-
-static inline void skb_clear_hash_if_not_l4(struct sk_buff *skb)
-{
- if (!skb->l4_hash)
- skb_clear_hash(skb);
-}
-
static inline void skb_copy_hash(struct sk_buff *to, const struct sk_buff *from)
{
to->hash = from->hash;
diff --git a/include/net/flow_dissector.h b/include/net/flow_dissector.h
index 6777a84..af76c49 100644
--- a/include/net/flow_dissector.h
+++ b/include/net/flow_dissector.h
@@ -167,4 +167,9 @@ struct flow_keys_digest {
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);
+}
+
#endif
diff --git a/net/core/flow_dissector.c b/net/core/flow_dissector.c
index 11e6540..151b6e4 100644
--- a/net/core/flow_dissector.c
+++ b/net/core/flow_dissector.c
@@ -590,15 +590,6 @@ void make_flow_keys_digest(struct flow_keys_digest *digest,
}
EXPORT_SYMBOL(make_flow_keys_digest);
-static inline void __skb_set_sw_hash(struct sk_buff *skb, u32 hash,
- struct flow_keys *keys)
-{
- if (keys->ports.ports)
- skb->l4_hash = 1;
- skb->sw_hash = 1;
- skb->hash = hash;
-}
-
/**
* __skb_get_hash: calculate a flow hash
* @skb: sk_buff to calculate flow hash from
@@ -619,7 +610,8 @@ void __skb_get_hash(struct sk_buff *skb)
if (!hash)
return;
- __skb_set_sw_hash(skb, hash, &keys);
+ __skb_set_sw_hash(skb, hash,
+ flow_keys_have_l4(&keys));
}
EXPORT_SYMBOL(__skb_get_hash);
@@ -648,7 +640,8 @@ __u32 __skb_get_hash_flowi6(struct sk_buff *skb, struct flowi6 *fl6)
keys.tags.flow_label = (__force u32)fl6->flowlabel;
keys.basic.ip_proto = fl6->flowi6_proto;
- __skb_set_sw_hash(skb, flow_hash_from_keys(&keys), &keys);
+ __skb_set_sw_hash(skb, flow_hash_from_keys(&keys),
+ flow_keys_have_l4(&keys));
return skb->hash;
}
@@ -668,7 +661,8 @@ __u32 __skb_get_hash_flowi4(struct sk_buff *skb, struct flowi4 *fl4)
keys.keyid.keyid = fl4->fl4_gre_key;
keys.basic.ip_proto = fl4->flowi4_proto;
- __skb_set_sw_hash(skb, flow_hash_from_keys(&keys), &keys);
+ __skb_set_sw_hash(skb, flow_hash_from_keys(&keys),
+ flow_keys_have_l4(&keys));
return skb->hash;
}
--
1.8.1
--
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