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authorParthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com>2016-11-01 16:02:49 +0300
committerDavid S. Miller <davem@davemloft.net>2016-11-01 18:53:26 +0300
commitf40acbaf425e88a992ff5d41f6237a8e465de8af (patch)
treeafc3bd78cc0794038a30d19f94765456ec3b3559 /net/tipc/socket.c
parent99a20889816a653e192db23701b0fda00399b91f (diff)
downloadlinux-f40acbaf425e88a992ff5d41f6237a8e465de8af.tar.xz
tipc: remove SS_CONNECTED sock state
In this commit, we replace references to sock->state SS_CONNECTE with sk_state TIPC_ESTABLISHED. Finally, the sock->state is no longer explicitly used by tipc. The FSM below is for various types of connection oriented sockets. Stream Server Listening Socket: +-----------+ +-------------+ | TIPC_OPEN |------>| TIPC_LISTEN | +-----------+ +-------------+ Stream Server Data Socket: +-----------+ +------------------+ | TIPC_OPEN |------>| TIPC_ESTABLISHED | +-----------+ +------------------+ ^ | | | | v +--------------------+ | TIPC_DISCONNECTING | +--------------------+ Stream Socket Client: +-----------+ +-----------------+ | TIPC_OPEN |------>| TIPC_CONNECTING |------+ +-----------+ +-----------------+ | | | | | v | +------------------+ | | TIPC_ESTABLISHED | | +------------------+ | ^ | | | | | | v | +--------------------+ | | TIPC_DISCONNECTING |<--+ +--------------------+ Signed-off-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/tipc/socket.c')
-rw-r--r--net/tipc/socket.c86
1 files changed, 38 insertions, 48 deletions
diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 074f4d546828..149396366e80 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -294,7 +294,7 @@ static void tsk_rej_rx_queue(struct sock *sk)
static bool tipc_sk_connected(struct sock *sk)
{
- return sk->sk_socket->state == SS_CONNECTED;
+ return sk->sk_state == TIPC_ESTABLISHED;
}
/* tipc_sk_type_connectionless - check if the socket is datagram socket
@@ -639,7 +639,7 @@ static int tipc_getname(struct socket *sock, struct sockaddr *uaddr,
memset(addr, 0, sizeof(*addr));
if (peer) {
- if ((sock->state != SS_CONNECTED) &&
+ if ((!tipc_sk_connected(sk)) &&
((peer != 2) || (sk->sk_state != TIPC_DISCONNECTING)))
return -ENOTCONN;
addr->addr.id.ref = tsk_peer_port(tsk);
@@ -690,29 +690,26 @@ static unsigned int tipc_poll(struct file *file, struct socket *sock,
if (sk->sk_shutdown == SHUTDOWN_MASK)
mask |= POLLHUP;
- if ((int)sock->state == SS_CONNECTED) {
+ switch (sk->sk_state) {
+ case TIPC_ESTABLISHED:
if (!tsk->link_cong && !tsk_conn_cong(tsk))
mask |= POLLOUT;
+ /* fall thru' */
+ case TIPC_LISTEN:
+ case TIPC_CONNECTING:
if (!skb_queue_empty(&sk->sk_receive_queue))
mask |= (POLLIN | POLLRDNORM);
- } else {
- switch (sk->sk_state) {
- case TIPC_OPEN:
- if (!tsk->link_cong)
- mask |= POLLOUT;
- if (tipc_sk_type_connectionless(sk) &&
- (!skb_queue_empty(&sk->sk_receive_queue)))
- mask |= (POLLIN | POLLRDNORM);
- break;
- case TIPC_DISCONNECTING:
- mask = (POLLIN | POLLRDNORM | POLLHUP);
- break;
- case TIPC_LISTEN:
- case TIPC_CONNECTING:
- if (!skb_queue_empty(&sk->sk_receive_queue))
- mask |= (POLLIN | POLLRDNORM);
- break;
- }
+ break;
+ case TIPC_OPEN:
+ if (!tsk->link_cong)
+ mask |= POLLOUT;
+ if (tipc_sk_type_connectionless(sk) &&
+ (!skb_queue_empty(&sk->sk_receive_queue)))
+ mask |= (POLLIN | POLLRDNORM);
+ break;
+ case TIPC_DISCONNECTING:
+ mask = (POLLIN | POLLRDNORM | POLLHUP);
+ break;
}
return mask;
@@ -1045,7 +1042,7 @@ static int tipc_wait_for_sndpkt(struct socket *sock, long *timeo_p)
return err;
if (sk->sk_state == TIPC_DISCONNECTING)
return -EPIPE;
- else if (sock->state != SS_CONNECTED)
+ else if (!tipc_sk_connected(sk))
return -ENOTCONN;
if (!*timeo_p)
return -EAGAIN;
@@ -1112,7 +1109,7 @@ static int __tipc_send_stream(struct socket *sock, struct msghdr *m, size_t dsz)
if (dsz > (uint)INT_MAX)
return -EMSGSIZE;
- if (unlikely(sock->state != SS_CONNECTED)) {
+ if (unlikely(!tipc_sk_connected(sk))) {
if (sk->sk_state == TIPC_DISCONNECTING)
return -EPIPE;
else
@@ -1627,29 +1624,11 @@ static bool filter_connect(struct tipc_sock *tsk, struct sk_buff *skb)
{
struct sock *sk = &tsk->sk;
struct net *net = sock_net(sk);
- struct socket *sock = sk->sk_socket;
struct tipc_msg *hdr = buf_msg(skb);
if (unlikely(msg_mcast(hdr)))
return false;
- switch ((int)sock->state) {
- case SS_CONNECTED:
-
- /* Accept only connection-based messages sent by peer */
- if (unlikely(!tsk_peer_msg(tsk, hdr)))
- return false;
-
- if (unlikely(msg_errcode(hdr))) {
- tipc_set_sk_state(sk, TIPC_DISCONNECTING);
- /* Let timer expire on it's own */
- tipc_node_remove_conn(net, tsk_peer_node(tsk),
- tsk->portid);
- sk->sk_state_change(sk);
- }
- return true;
- }
-
switch (sk->sk_state) {
case TIPC_CONNECTING:
/* Accept only ACK or NACK message */
@@ -1670,7 +1649,6 @@ static bool filter_connect(struct tipc_sock *tsk, struct sk_buff *skb)
tipc_sk_finish_conn(tsk, msg_origport(hdr), msg_orignode(hdr));
msg_set_importance(&tsk->phdr, msg_importance(hdr));
- sock->state = SS_CONNECTED;
/* If 'ACK+' message, add to socket receive queue */
if (msg_data_sz(hdr))
@@ -1692,6 +1670,19 @@ static bool filter_connect(struct tipc_sock *tsk, struct sk_buff *skb)
if (!msg_connected(hdr) && !(msg_errcode(hdr)))
return true;
break;
+ case TIPC_ESTABLISHED:
+ /* Accept only connection-based messages sent by peer */
+ if (unlikely(!tsk_peer_msg(tsk, hdr)))
+ return false;
+
+ if (unlikely(msg_errcode(hdr))) {
+ tipc_set_sk_state(sk, TIPC_DISCONNECTING);
+ /* Let timer expire on it's own */
+ tipc_node_remove_conn(net, tsk_peer_node(tsk),
+ tsk->portid);
+ sk->sk_state_change(sk);
+ }
+ return true;
default:
pr_err("Unknown sk_state %u\n", sk->sk_state);
}
@@ -2037,13 +2028,13 @@ static int tipc_connect(struct socket *sock, struct sockaddr *dest,
timeout = msecs_to_jiffies(timeout);
/* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */
res = tipc_wait_for_connect(sock, &timeout);
- goto exit;
- }
-
- if (sock->state == SS_CONNECTED)
+ break;
+ case TIPC_ESTABLISHED:
res = -EISCONN;
- else
+ break;
+ default:
res = -EINVAL;
+ }
exit:
release_sock(sk);
@@ -2152,7 +2143,6 @@ static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags)
/* Connect new socket to it's peer */
tipc_sk_finish_conn(new_tsock, msg_origport(msg), msg_orignode(msg));
- new_sock->state = SS_CONNECTED;
tsk_set_importance(new_tsock, msg_importance(msg));
if (msg_named(msg)) {