kfree_skb(__skb_dequeue(&sk->sk_receive_queue));
}
+/* tipc_sk_respond() : send response message back to sender
+ */
+static void tipc_sk_respond(struct sock *sk, struct sk_buff *skb, int err)
+{
+ u32 selector;
+ u32 dnode;
+ u32 onode = tipc_own_addr(sock_net(sk));
+
+ if (!tipc_msg_reverse(onode, &skb, err))
+ return;
+
+ dnode = msg_destnode(buf_msg(skb));
+ selector = msg_origport(buf_msg(skb));
+ tipc_node_xmit_skb(sock_net(sk), skb, dnode, selector);
+}
+
/**
* tsk_rej_rx_queue - reject all buffers in socket receive queue
*
static void tsk_rej_rx_queue(struct sock *sk)
{
struct sk_buff *skb;
- u32 dnode;
- u32 own_node = tsk_own_node(tipc_sk(sk));
- while ((skb = __skb_dequeue(&sk->sk_receive_queue))) {
- if (tipc_msg_reverse(own_node, skb, &dnode, TIPC_ERR_NO_PORT))
- tipc_link_xmit_skb(sock_net(sk), skb, dnode, 0);
- }
+ while ((skb = __skb_dequeue(&sk->sk_receive_queue)))
+ tipc_sk_respond(sk, skb, TIPC_ERR_NO_PORT);
}
/* tsk_peer_msg - verify if message was sent by connected port's peer
tsk->connected = 0;
tipc_node_remove_conn(net, dnode, tsk->portid);
}
- if (tipc_msg_reverse(tsk_own_node(tsk), skb, &dnode,
- TIPC_ERR_NO_PORT))
- tipc_link_xmit_skb(net, skb, dnode, 0);
+ tipc_sk_respond(sk, skb, TIPC_ERR_NO_PORT);
}
}
tsk_own_node(tsk), tsk_peer_port(tsk),
tsk->portid, TIPC_ERR_NO_PORT);
if (skb)
- tipc_link_xmit_skb(net, skb, dnode, tsk->portid);
+ tipc_node_xmit_skb(net, skb, dnode, tsk->portid);
tipc_node_remove_conn(net, dnode, tsk->portid);
}
do {
rc = tipc_bclink_xmit(net, pktchain);
- if (likely(rc >= 0)) {
- rc = dsz;
- break;
+ if (likely(!rc))
+ return dsz;
+
+ if (rc == -ELINKCONG) {
+ tsk->link_cong = 1;
+ rc = tipc_wait_for_sndmsg(sock, &timeo);
+ if (!rc)
+ continue;
}
+ __skb_queue_purge(pktchain);
if (rc == -EMSGSIZE) {
msg->msg_iter = save;
goto new_mtu;
}
- if (rc != -ELINKCONG)
- break;
- tipc_sk(sk)->link_cong = 1;
- rc = tipc_wait_for_sndmsg(sock, &timeo);
- if (rc)
- __skb_queue_purge(pktchain);
- } while (!rc);
+ break;
+ } while (1);
return rc;
}
/**
* tipc_sk_proto_rcv - receive a connection mng protocol message
* @tsk: receiving socket
- * @skb: pointer to message buffer. Set to NULL if buffer is consumed.
+ * @skb: pointer to message buffer.
*/
-static void tipc_sk_proto_rcv(struct tipc_sock *tsk, struct sk_buff **skb)
+static void tipc_sk_proto_rcv(struct tipc_sock *tsk, struct sk_buff *skb)
{
- struct tipc_msg *msg = buf_msg(*skb);
+ struct sock *sk = &tsk->sk;
+ struct tipc_msg *hdr = buf_msg(skb);
+ int mtyp = msg_type(hdr);
int conn_cong;
- u32 dnode;
- u32 own_node = tsk_own_node(tsk);
+
/* Ignore if connection cannot be validated: */
- if (!tsk_peer_msg(tsk, msg))
+ if (!tsk_peer_msg(tsk, hdr))
goto exit;
tsk->probing_state = TIPC_CONN_OK;
- if (msg_type(msg) == CONN_ACK) {
+ if (mtyp == CONN_PROBE) {
+ msg_set_type(hdr, CONN_PROBE_REPLY);
+ tipc_sk_respond(sk, skb, TIPC_OK);
+ return;
+ } else if (mtyp == CONN_ACK) {
conn_cong = tsk_conn_cong(tsk);
- tsk->sent_unacked -= msg_msgcnt(msg);
+ tsk->sent_unacked -= msg_msgcnt(hdr);
if (conn_cong)
- tsk->sk.sk_write_space(&tsk->sk);
- } else if (msg_type(msg) == CONN_PROBE) {
- if (tipc_msg_reverse(own_node, *skb, &dnode, TIPC_OK)) {
- msg_set_type(msg, CONN_PROBE_REPLY);
- return;
- }
+ sk->sk_write_space(sk);
+ } else if (mtyp != CONN_PROBE_REPLY) {
+ pr_warn("Received unknown CONN_PROTO msg\n");
}
- /* Do nothing if msg_type() == CONN_PROBE_REPLY */
exit:
- kfree_skb(*skb);
- *skb = NULL;
+ kfree_skb(skb);
}
static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p)
do {
skb = skb_peek(pktchain);
TIPC_SKB_CB(skb)->wakeup_pending = tsk->link_cong;
- rc = tipc_link_xmit(net, pktchain, dnode, tsk->portid);
- if (likely(rc >= 0)) {
+ rc = tipc_node_xmit(net, pktchain, dnode, tsk->portid);
+ if (likely(!rc)) {
if (sock->state != SS_READY)
sock->state = SS_CONNECTING;
- rc = dsz;
- break;
+ return dsz;
+ }
+ if (rc == -ELINKCONG) {
+ tsk->link_cong = 1;
+ rc = tipc_wait_for_sndmsg(sock, &timeo);
+ if (!rc)
+ continue;
}
+ __skb_queue_purge(pktchain);
if (rc == -EMSGSIZE) {
m->msg_iter = save;
goto new_mtu;
}
- if (rc != -ELINKCONG)
- break;
- tsk->link_cong = 1;
- rc = tipc_wait_for_sndmsg(sock, &timeo);
- if (rc)
- __skb_queue_purge(pktchain);
- } while (!rc);
+ break;
+ } while (1);
return rc;
}
return rc;
do {
if (likely(!tsk_conn_cong(tsk))) {
- rc = tipc_link_xmit(net, pktchain, dnode, portid);
+ rc = tipc_node_xmit(net, pktchain, dnode, portid);
if (likely(!rc)) {
tsk->sent_unacked++;
sent += send;
if (sent == dsz)
- break;
+ return dsz;
goto next;
}
if (rc == -EMSGSIZE) {
+ __skb_queue_purge(pktchain);
tsk->max_pkt = tipc_node_get_mtu(net, dnode,
portid);
m->msg_iter = save;
}
if (rc != -ELINKCONG)
break;
+
tsk->link_cong = 1;
}
rc = tipc_wait_for_sndpkt(sock, &timeo);
- if (rc)
- __skb_queue_purge(pktchain);
} while (!rc);
+ __skb_queue_purge(pktchain);
return sent ? sent : rc;
}
return;
msg = buf_msg(skb);
msg_set_msgcnt(msg, ack);
- tipc_link_xmit_skb(net, skb, dnode, msg_link_selector(msg));
+ tipc_node_xmit_skb(net, skb, dnode, msg_link_selector(msg));
}
static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop)
int rc = TIPC_OK;
if (unlikely(msg_user(msg) == CONN_MANAGER)) {
- tipc_sk_proto_rcv(tsk, skb);
+ tipc_sk_proto_rcv(tsk, *skb);
return TIPC_OK;
}
{
int err;
atomic_t *dcnt;
- u32 dnode;
+ u32 dnode = msg_prevnode(buf_msg(skb));
struct tipc_sock *tsk = tipc_sk(sk);
struct net *net = sock_net(sk);
uint truesize = skb->truesize;
atomic_add(truesize, dcnt);
return 0;
}
- if (!err || tipc_msg_reverse(tsk_own_node(tsk), skb, &dnode, -err))
- tipc_link_xmit_skb(net, skb, dnode, tsk->portid);
+ if (!err || tipc_msg_reverse(tsk_own_node(tsk), &skb, -err))
+ tipc_node_xmit_skb(net, skb, dnode, tsk->portid);
return 0;
}
if (!err) {
dnode = msg_destnode(buf_msg(skb));
goto xmit;
+ } else {
+ dnode = msg_prevnode(buf_msg(skb));
}
tn = net_generic(net, tipc_net_id);
- if (!tipc_msg_reverse(tn->own_addr, skb, &dnode, -err))
+ if (!tipc_msg_reverse(tn->own_addr, &skb, -err))
continue;
xmit:
- tipc_link_xmit_skb(net, skb, dnode, dport);
+ tipc_node_xmit_skb(net, skb, dnode, dport);
}
return err ? -EHOSTUNREACH : 0;
}
case SS_CONNECTED:
restart:
+ dnode = tsk_peer_node(tsk);
+
/* Disconnect and send a 'FIN+' or 'FIN-' message to peer */
skb = __skb_dequeue(&sk->sk_receive_queue);
if (skb) {
kfree_skb(skb);
goto restart;
}
- if (tipc_msg_reverse(tsk_own_node(tsk), skb, &dnode,
- TIPC_CONN_SHUTDOWN))
- tipc_link_xmit_skb(net, skb, dnode,
- tsk->portid);
+ tipc_sk_respond(sk, skb, TIPC_CONN_SHUTDOWN);
} else {
- dnode = tsk_peer_node(tsk);
-
skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE,
TIPC_CONN_MSG, SHORT_H_SIZE,
0, dnode, tsk_own_node(tsk),
tsk_peer_port(tsk),
tsk->portid, TIPC_CONN_SHUTDOWN);
- tipc_link_xmit_skb(net, skb, dnode, tsk->portid);
+ tipc_node_xmit_skb(net, skb, dnode, tsk->portid);
}
tsk->connected = 0;
sock->state = SS_DISCONNECTING;
}
bh_unlock_sock(sk);
if (skb)
- tipc_link_xmit_skb(sock_net(sk), skb, peer_node, tsk->portid);
+ tipc_node_xmit_skb(sock_net(sk), skb, peer_node, tsk->portid);
exit:
sock_put(sk);
}
projects / cascardo / linux.git / blobdiff