From d570d86497eeb11410b1c096d82ade11bcdd966c Mon Sep 17 00:00:00 2001 From: Jon Paul Maloy Date: Thu, 5 Feb 2015 08:36:38 -0500 Subject: [PATCH] tipc: enqueue arrived buffers in socket in separate function The code for enqueuing arriving buffers in the function tipc_sk_rcv() contains long code lines and currently goes to two indentation levels. As a cosmetic preparaton for the next commits, we break it out into a separate function. Reviewed-by: Ying Xue Signed-off-by: Jon Maloy Signed-off-by: David S. Miller --- net/tipc/socket.c | 46 +++++++++++++++++++++++++++++++--------------- 1 file changed, 31 insertions(+), 15 deletions(-) diff --git a/net/tipc/socket.c b/net/tipc/socket.c index f9cd587e4090..1d98bfcda6f6 100644 --- a/net/tipc/socket.c +++ b/net/tipc/socket.c @@ -1764,6 +1764,35 @@ static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb) return 0; } +/** + * tipc_sk_enqueue_skb - enqueue buffer to socket or backlog queue + * @sk: socket + * @skb: pointer to message. Set to NULL if buffer is consumed. + * @dnode: if buffer should be forwarded/returned, send to this node + * + * Caller must hold socket lock + * + * Returns TIPC_OK (0) or -tipc error code + */ +static int tipc_sk_enqueue_skb(struct sock *sk, struct sk_buff **skb) +{ + unsigned int lim; + atomic_t *dcnt; + + if (unlikely(!*skb)) + return TIPC_OK; + if (!sock_owned_by_user(sk)) + return filter_rcv(sk, skb); + dcnt = &tipc_sk(sk)->dupl_rcvcnt; + if (sk->sk_backlog.len) + atomic_set(dcnt, 0); + lim = rcvbuf_limit(sk, *skb) + atomic_read(dcnt); + if (unlikely(sk_add_backlog(sk, *skb, lim))) + return -TIPC_ERR_OVERLOAD; + *skb = NULL; + return TIPC_OK; +} + /** * tipc_sk_rcv - handle incoming message * @skb: buffer containing arriving message @@ -1776,8 +1805,7 @@ int tipc_sk_rcv(struct net *net, struct sk_buff *skb) struct tipc_net *tn; struct sock *sk; u32 dport = msg_destport(buf_msg(skb)); - int err = TIPC_OK; - uint limit; + int err; u32 dnode; /* Validate destination and message */ @@ -1788,20 +1816,8 @@ int tipc_sk_rcv(struct net *net, struct sk_buff *skb) } sk = &tsk->sk; - /* Queue message */ spin_lock_bh(&sk->sk_lock.slock); - - if (!sock_owned_by_user(sk)) { - err = filter_rcv(sk, &skb); - } else { - if (sk->sk_backlog.len == 0) - atomic_set(&tsk->dupl_rcvcnt, 0); - limit = rcvbuf_limit(sk, skb) + atomic_read(&tsk->dupl_rcvcnt); - if (likely(!sk_add_backlog(sk, skb, limit))) - skb = NULL; - else - err = -TIPC_ERR_OVERLOAD; - } + err = tipc_sk_enqueue_skb(sk, &skb); spin_unlock_bh(&sk->sk_lock.slock); sock_put(sk); exit: -- 2.20.1