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Diffstat (limited to 'net/rds/tcp_connect.c')
-rw-r--r--net/rds/tcp_connect.c155
1 files changed, 116 insertions, 39 deletions
diff --git a/net/rds/tcp_connect.c b/net/rds/tcp_connect.c
index a65ee78db0c5..92891b0d224d 100644
--- a/net/rds/tcp_connect.c
+++ b/net/rds/tcp_connect.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2006 Oracle. All rights reserved.
+ * Copyright (c) 2006, 2017 Oracle and/or its affiliates. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
@@ -40,79 +40,153 @@
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(&sk->sk_callback_lock);
- conn = sk->sk_user_data;
- if (!conn) {
+ read_lock_bh(&sk->sk_callback_lock);
+ 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);
- switch(sk->sk_state) {
- /* ignore connecting sockets as they make progress */
- case TCP_SYN_SENT:
- case TCP_SYN_RECV:
- break;
- case TCP_ESTABLISHED:
- rds_connect_complete(conn);
- break;
- case TCP_CLOSE:
- rds_conn_drop(conn);
- default:
- break;
+ switch (sk->sk_state) {
+ /* ignore connecting sockets as they make progress */
+ case TCP_SYN_SENT:
+ case TCP_SYN_RECV:
+ break;
+ case TCP_ESTABLISHED:
+ /* Force the peer to reconnect so that we have the
+ * TCP ports going from <smaller-ip>.<transient> to
+ * <larger-ip>.<RDS_TCP_PORT>. We avoid marking the
+ * RDS connection as RDS_CONN_UP until the reconnect,
+ * to avoid RDS datagram loss.
+ */
+ if (rds_addr_cmp(&cp->cp_conn->c_laddr,
+ &cp->cp_conn->c_faddr) >= 0 &&
+ rds_conn_path_transition(cp, RDS_CONN_CONNECTING,
+ RDS_CONN_ERROR)) {
+ rds_conn_path_drop(cp, false);
+ } else {
+ rds_connect_path_complete(cp, RDS_CONN_CONNECTING);
+ }
+ break;
+ case TCP_CLOSE_WAIT:
+ case TCP_CLOSE:
+ rds_conn_path_drop(cp, false);
+ break;
+ default:
+ break;
}
out:
- read_unlock(&sk->sk_callback_lock);
+ read_unlock_bh(&sk->sk_callback_lock);
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;
+ struct sockaddr_in6 sin6;
+ struct sockaddr_in sin;
+ struct sockaddr *addr;
+ int addrlen;
+ bool isv6;
int ret;
+ struct rds_connection *conn = cp->cp_conn;
+ struct rds_tcp_connection *tc = cp->cp_transport_data;
+
+ /* 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_path_up(cp)) {
+ mutex_unlock(&tc->t_conn_path_lock);
+ return 0;
+ }
+ if (ipv6_addr_v4mapped(&conn->c_laddr)) {
+ ret = sock_create_kern(rds_conn_net(conn), PF_INET,
+ SOCK_STREAM, IPPROTO_TCP, &sock);
+ isv6 = false;
+ } else {
+ ret = sock_create_kern(rds_conn_net(conn), PF_INET6,
+ SOCK_STREAM, IPPROTO_TCP, &sock);
+ isv6 = true;
+ }
- ret = sock_create(PF_INET, SOCK_STREAM, IPPROTO_TCP, &sock);
if (ret < 0)
goto out;
- rds_tcp_tune(sock);
+ if (!rds_tcp_tune(sock)) {
+ ret = -EINVAL;
+ goto out;
+ }
- src.sin_family = AF_INET;
- src.sin_addr.s_addr = (__force u32)conn->c_laddr;
- src.sin_port = (__force u16)htons(0);
+ if (isv6) {
+ sin6.sin6_family = AF_INET6;
+ sin6.sin6_addr = conn->c_laddr;
+ sin6.sin6_port = 0;
+ sin6.sin6_flowinfo = 0;
+ sin6.sin6_scope_id = conn->c_dev_if;
+ addr = (struct sockaddr *)&sin6;
+ addrlen = sizeof(sin6);
+ } else {
+ sin.sin_family = AF_INET;
+ sin.sin_addr.s_addr = conn->c_laddr.s6_addr32[3];
+ sin.sin_port = 0;
+ addr = (struct sockaddr *)&sin;
+ addrlen = sizeof(sin);
+ }
- ret = sock->ops->bind(sock, (struct sockaddr *)&src, sizeof(src));
+ ret = kernel_bind(sock, (struct sockaddr_unsized *)addr, addrlen);
if (ret) {
- rdsdebug("bind failed with %d at address %pI4\n",
+ rdsdebug("bind failed with %d at address %pI6c\n",
ret, &conn->c_laddr);
goto out;
}
- dest.sin_family = AF_INET;
- dest.sin_addr.s_addr = (__force u32)conn->c_faddr;
- dest.sin_port = (__force u16)htons(RDS_TCP_PORT);
+ if (isv6) {
+ sin6.sin6_family = AF_INET6;
+ sin6.sin6_addr = conn->c_faddr;
+ sin6.sin6_port = htons(RDS_TCP_PORT);
+ sin6.sin6_flowinfo = 0;
+ sin6.sin6_scope_id = conn->c_dev_if;
+ addr = (struct sockaddr *)&sin6;
+ addrlen = sizeof(sin6);
+ } else {
+ sin.sin_family = AF_INET;
+ sin.sin_addr.s_addr = conn->c_faddr.s6_addr32[3];
+ sin.sin_port = htons(RDS_TCP_PORT);
+ addr = (struct sockaddr *)&sin;
+ addrlen = sizeof(sin);
+ }
/*
* once we call connect() we can start getting callbacks and they
* own the socket
*/
- rds_tcp_set_callbacks(sock, conn);
- ret = sock->ops->connect(sock, (struct sockaddr *)&dest, sizeof(dest),
- O_NONBLOCK);
- sock = NULL;
+ rds_tcp_set_callbacks(sock, cp);
+ ret = kernel_connect(sock, (struct sockaddr_unsized *)addr, addrlen, O_NONBLOCK);
- rdsdebug("connect to address %pI4 returned %d\n", &conn->c_faddr, ret);
+ rdsdebug("connect to address %pI6c returned %d\n", &conn->c_faddr, ret);
if (ret == -EINPROGRESS)
ret = 0;
+ if (ret == 0) {
+ rds_tcp_keepalive(sock);
+ sock = NULL;
+ } else {
+ rds_tcp_restore_callbacks(sock, cp->cp_transport_data);
+ }
out:
+ mutex_unlock(&tc->t_conn_path_lock);
if (sock)
sock_release(sock);
return ret;
@@ -127,14 +201,17 @@ 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) {
+ if (rds_destroy_pending(cp->cp_conn))
+ sock_no_linger(sock->sk);
sock->ops->shutdown(sock, RCV_SHUTDOWN | SEND_SHUTDOWN);
lock_sock(sock->sk);
rds_tcp_restore_callbacks(sock, tc); /* tc->tc_sock = NULL */
generated by cgit (git 2.34.1) at 2025-12-22 00:34:46 +0000