[PATCH 4/5] net: Allow setting sock flow hash without a sock
From: Tom Herbert <hidden>
Date: 2013-11-20 20:27:51
Subsystem:
networking [general], networking [sockets], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Kuniyuki Iwashima, Willem de Bruijn, Linus Torvalds
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: Tom Herbert <redacted> --- include/net/sock.h | 18 ++++++++++++++---- 1 file changed, 14 insertions(+), 4 deletions(-)
diff --git a/include/net/sock.h b/include/net/sock.h
index e3a18ff..fe2410b 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h@@ -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) {
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1.8.4.1