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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-10-20 00:10:27 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-10-20 00:10:27 -0300
commitd0b2f91bede3bd5e3d24dd6803e56eee959c1797 (patch)
tree7fee4ab0509879c373c4f2cbd5b8a5be5b4041ee /net/rds/tcp_connect.c
parente914f8eb445e8f74b00303c19c2ffceaedd16a05 (diff)
Linux-libre 4.8.2-gnupck-4.8.2-gnu
Diffstat (limited to 'net/rds/tcp_connect.c')
-rw-r--r--net/rds/tcp_connect.c43
1 files changed, 26 insertions, 17 deletions
diff --git a/net/rds/tcp_connect.c b/net/rds/tcp_connect.c
index f6e95d60d..05f61c533 100644
--- a/net/rds/tcp_connect.c
+++ b/net/rds/tcp_connect.c
@@ -40,16 +40,16 @@
void rds_tcp_state_change(struct sock *sk)
{
void (*state_change)(struct sock *sk);
- struct rds_connection *conn;
+ struct rds_conn_path *cp;
struct rds_tcp_connection *tc;
read_lock_bh(&sk->sk_callback_lock);
- conn = sk->sk_user_data;
- if (!conn) {
+ cp = sk->sk_user_data;
+ if (!cp) {
state_change = sk->sk_state_change;
goto out;
}
- tc = conn->c_transport_data;
+ tc = cp->cp_transport_data;
state_change = tc->t_orig_state_change;
rdsdebug("sock %p state_change to %d\n", tc->t_sock, sk->sk_state);
@@ -60,11 +60,11 @@ void rds_tcp_state_change(struct sock *sk)
case TCP_SYN_RECV:
break;
case TCP_ESTABLISHED:
- rds_connect_path_complete(conn, RDS_CONN_CONNECTING);
+ rds_connect_path_complete(cp, RDS_CONN_CONNECTING);
break;
case TCP_CLOSE_WAIT:
case TCP_CLOSE:
- rds_conn_drop(conn);
+ rds_conn_path_drop(cp);
default:
break;
}
@@ -73,17 +73,24 @@ out:
state_change(sk);
}
-int rds_tcp_conn_connect(struct rds_connection *conn)
+int rds_tcp_conn_path_connect(struct rds_conn_path *cp)
{
struct socket *sock = NULL;
struct sockaddr_in src, dest;
int ret;
- struct rds_tcp_connection *tc = conn->c_transport_data;
+ struct rds_connection *conn = cp->cp_conn;
+ struct rds_tcp_connection *tc = cp->cp_transport_data;
- mutex_lock(&tc->t_conn_lock);
+ /* for multipath rds,we only trigger the connection after
+ * the handshake probe has determined the number of paths.
+ */
+ if (cp->cp_index > 0 && cp->cp_conn->c_npaths < 2)
+ return -EAGAIN;
+
+ mutex_lock(&tc->t_conn_path_lock);
- if (rds_conn_up(conn)) {
- mutex_unlock(&tc->t_conn_lock);
+ if (rds_conn_path_up(cp)) {
+ mutex_unlock(&tc->t_conn_path_lock);
return 0;
}
ret = sock_create_kern(rds_conn_net(conn), PF_INET,
@@ -112,10 +119,11 @@ int rds_tcp_conn_connect(struct rds_connection *conn)
* once we call connect() we can start getting callbacks and they
* own the socket
*/
- rds_tcp_set_callbacks(sock, conn);
+ rds_tcp_set_callbacks(sock, cp);
ret = sock->ops->connect(sock, (struct sockaddr *)&dest, sizeof(dest),
O_NONBLOCK);
+ cp->cp_outgoing = 1;
rdsdebug("connect to address %pI4 returned %d\n", &conn->c_faddr, ret);
if (ret == -EINPROGRESS)
ret = 0;
@@ -123,11 +131,11 @@ int rds_tcp_conn_connect(struct rds_connection *conn)
rds_tcp_keepalive(sock);
sock = NULL;
} else {
- rds_tcp_restore_callbacks(sock, conn->c_transport_data);
+ rds_tcp_restore_callbacks(sock, cp->cp_transport_data);
}
out:
- mutex_unlock(&tc->t_conn_lock);
+ mutex_unlock(&tc->t_conn_path_lock);
if (sock)
sock_release(sock);
return ret;
@@ -142,12 +150,13 @@ out:
* callbacks to those set by TCP. Our callbacks won't execute again once we
* hold the sock lock.
*/
-void rds_tcp_conn_shutdown(struct rds_connection *conn)
+void rds_tcp_conn_path_shutdown(struct rds_conn_path *cp)
{
- struct rds_tcp_connection *tc = conn->c_transport_data;
+ struct rds_tcp_connection *tc = cp->cp_transport_data;
struct socket *sock = tc->t_sock;
- rdsdebug("shutting down conn %p tc %p sock %p\n", conn, tc, sock);
+ rdsdebug("shutting down conn %p tc %p sock %p\n",
+ cp->cp_conn, tc, sock);
if (sock) {
sock->ops->shutdown(sock, RCV_SHUTDOWN | SEND_SHUTDOWN);