diff options
| -rw-r--r-- | net/sunrpc/xprtsock.c | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c index 43cd89eacfab..7ed47b4943da 100644 --- a/net/sunrpc/xprtsock.c +++ b/net/sunrpc/xprtsock.c @@ -1746,13 +1746,29 @@ static int xs_bind(struct sock_xprt *transport, struct socket *sock) unsigned short port = xs_get_srcport(transport); unsigned short last; + /* + * If we are asking for any ephemeral port (i.e. port == 0 && + * transport->xprt.resvport == 0), don't bind. Let the local + * port selection happen implicitly when the socket is used + * (for example at connect time). + * + * This ensures that we can continue to establish TCP + * connections even when all local ephemeral ports are already + * a part of some TCP connection. This makes no difference + * for UDP sockets, but also doens't harm them. + * + * If we're asking for any reserved port (i.e. port == 0 && + * transport->xprt.resvport == 1) xs_get_srcport above will + * ensure that port is non-zero and we will bind as needed. + */ + if (port == 0) + return 0; + memcpy(&myaddr, &transport->srcaddr, transport->xprt.addrlen); do { rpc_set_port((struct sockaddr *)&myaddr, port); err = kernel_bind(sock, (struct sockaddr *)&myaddr, transport->xprt.addrlen); - if (port == 0) - break; if (err == 0) { transport->srcport = port; break; |