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| author | Jon Paul Maloy <jon.maloy@ericsson.com> | 2015-02-05 16:36:38 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-02-06 03:00:02 +0300 |
| commit | d570d86497eeb11410b1c096d82ade11bcdd966c (patch) | |
| tree | 8062856ffb899f95b7ec2f4a42aad004d8fc05c2 | |
| parent | 1186adf7df04e3b4298943fe89d9741ab42e30ff (diff) | |
| download | linux-d570d86497eeb11410b1c096d82ade11bcdd966c.tar.xz | |
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 <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/tipc/socket.c | 46 |
1 files 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 @@ -1765,6 +1765,35 @@ static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb) } /** + * 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 * Consumes buffer @@ -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: |