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net: Set sk_txhash from a random number

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This patch creates sk_set_txhash and eliminates protocol specific
inet_set_txhash and ip6_set_txhash. sk_set_txhash simply sets a
random number instead of performing flow dissection. sk_set_txash
is also allowed to be called multiple times for the same socket,
we'll need this when redoing the hash for negative routing advice.

Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tom Herbert
2015-07-28 16:02:05 -07:00
committed by David S. Miller
parent 7a86d96e4a
commit 877d1f6291
7 changed files with 14 additions and 41 deletions
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8
include/net/sock.h
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@@ -1687,6 +1687,14 @@ static inline void sock_graft(struct sock *sk, struct socket *parent)
kuid_t sock_i_uid(struct sock *sk);
unsigned long sock_i_ino(struct sock *sk);
static inline void sk_set_txhash(struct sock *sk)
{
sk->sk_txhash = prandom_u32();
if (unlikely(!sk->sk_txhash))
sk->sk_txhash = 1;
}
static inline struct dst_entry *
__sk_dst_get(struct sock *sk)
{