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authorJon Paul Maloy <jon.maloy@ericsson.com>2015-02-05 08:36:38 -0500
committerDavid S. Miller <davem@davemloft.net>2015-02-05 16:00:02 -0800
commitd570d86497eeb11410b1c096d82ade11bcdd966c (patch)
tree8062856ffb899f95b7ec2f4a42aad004d8fc05c2 /net/tipc
parent1186adf7df04e3b4298943fe89d9741ab42e30ff (diff)
downloadlinux-d570d86497eeb11410b1c096d82ade11bcdd966c.tar.bz2
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>
Diffstat (limited to 'net/tipc')
-rw-r--r--net/tipc/socket.c46
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: