From ce984da36e11c1e6db6002ea4f8a4b54e46f45c0 Mon Sep 17 00:00:00 2001 From: Richard Alpe Date: Fri, 26 Aug 2016 10:52:51 +0200 Subject: [PATCH] tipc: split UDP send function Split the UDP send function into two. One callback that prepares the skb and one transmit function that sends the skb. This will come in handy in later patches, when we introduce UDP replicast. Signed-off-by: Richard Alpe Reviewed-by: Jon Maloy Acked-by: Ying Xue Signed-off-by: David S. Miller --- net/tipc/udp_media.c | 50 ++++++++++++++++++++++++++++---------------- 1 file changed, 32 insertions(+), 18 deletions(-) diff --git a/net/tipc/udp_media.c b/net/tipc/udp_media.c index adb3c2117a1c..7033b4a1a655 100644 --- a/net/tipc/udp_media.c +++ b/net/tipc/udp_media.c @@ -140,28 +140,13 @@ static int tipc_udp_addr2msg(char *msg, struct tipc_media_addr *a) } /* tipc_send_msg - enqueue a send request */ -static int tipc_udp_send_msg(struct net *net, struct sk_buff *skb, - struct tipc_bearer *b, - struct tipc_media_addr *dest) +static int tipc_udp_xmit(struct net *net, struct sk_buff *skb, + struct udp_bearer *ub, struct udp_media_addr *src, + struct udp_media_addr *dst) { int ttl, err = 0; - struct udp_bearer *ub; - struct udp_media_addr *dst = (struct udp_media_addr *)&dest->value; - struct udp_media_addr *src = (struct udp_media_addr *)&b->addr.value; struct rtable *rt; - if (skb_headroom(skb) < UDP_MIN_HEADROOM) { - err = pskb_expand_head(skb, UDP_MIN_HEADROOM, 0, GFP_ATOMIC); - if (err) - goto tx_error; - } - - skb_set_inner_protocol(skb, htons(ETH_P_TIPC)); - ub = rcu_dereference_rtnl(b->media_ptr); - if (!ub) { - err = -ENODEV; - goto tx_error; - } if (dst->proto == htons(ETH_P_IP)) { struct flowi4 fl = { .daddr = dst->ipv4.s_addr, @@ -207,6 +192,35 @@ tx_error: return err; } +static int tipc_udp_send_msg(struct net *net, struct sk_buff *skb, + struct tipc_bearer *b, + struct tipc_media_addr *addr) +{ + struct udp_media_addr *src = (struct udp_media_addr *)&b->addr.value; + struct udp_media_addr *dst = (struct udp_media_addr *)&addr->value; + struct udp_bearer *ub; + int err = 0; + + if (skb_headroom(skb) < UDP_MIN_HEADROOM) { + err = pskb_expand_head(skb, UDP_MIN_HEADROOM, 0, GFP_ATOMIC); + if (err) + goto tx_error; + } + + skb_set_inner_protocol(skb, htons(ETH_P_TIPC)); + ub = rcu_dereference_rtnl(b->media_ptr); + if (!ub) { + err = -ENODEV; + goto tx_error; + } + + return tipc_udp_xmit(net, skb, ub, src, dst); + +tx_error: + kfree_skb(skb); + return err; +} + /* tipc_udp_recv - read data from bearer socket */ static int tipc_udp_recv(struct sock *sk, struct sk_buff *skb) { -- 2.20.1