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Commit fe477558 authored by Tom Herbert's avatar Tom Herbert Committed by David S. Miller
Browse files

net: Allow setting sock flow hash without a sock 



This patch adds sock_rps_record_flow_hash and sock_rps_reset_flow_hash
which take a hash value as an argument and sets the sock_flow_table
accordingly.  This allows the table to be populated in cases where flow
is being tracked outside of a sock structure.

sock_rps_record_flow and sock_rps_reset_flow call this function
where the hash is taken from sk_rxhash.

Signed-off-by: default avatarTom Herbert <therbert@google.com>
Signed-off-by: default avatarZhi Yong Wu <wuzhy@linux.vnet.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 84a6a0ac

include/net/sock.h

+14 −4
Original line number Diff line number Diff line
@@ -820,30 +820,40 @@ static inline int sk_backlog_rcv(struct sock *sk, struct sk_buff *skb) 
	return sk->sk_backlog_rcv(sk, skb);

}



static inline void sock_rps_record_flow(const struct sock *sk)

static inline void sock_rps_record_flow_hash(__u32 hash)

{

#ifdef CONFIG_RPS

	struct rps_sock_flow_table *sock_flow_table;



	rcu_read_lock();

	sock_flow_table = rcu_dereference(rps_sock_flow_table);

	rps_record_sock_flow(sock_flow_table, sk->sk_rxhash);

	rps_record_sock_flow(sock_flow_table, hash);

	rcu_read_unlock();

#endif

}



static inline void sock_rps_reset_flow(const struct sock *sk)

static inline void sock_rps_reset_flow_hash(__u32 hash)

{

#ifdef CONFIG_RPS

	struct rps_sock_flow_table *sock_flow_table;



	rcu_read_lock();

	sock_flow_table = rcu_dereference(rps_sock_flow_table);

	rps_reset_sock_flow(sock_flow_table, sk->sk_rxhash);

	rps_reset_sock_flow(sock_flow_table, hash);

	rcu_read_unlock();

#endif

}



static inline void sock_rps_record_flow(const struct sock *sk)

{

	sock_rps_record_flow_hash(sk->sk_rxhash);

}



static inline void sock_rps_reset_flow(const struct sock *sk)

{

	sock_rps_reset_flow_hash(sk->sk_rxhash);

}



static inline void sock_rps_save_rxhash(struct sock *sk,

					const struct sk_buff *skb)

{