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-rw-r--r--net/sunrpc/xprtsock.c34
1 files changed, 18 insertions, 16 deletions
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index 039444eb138f..9bb86cd3ee56 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -129,7 +129,7 @@ static struct ctl_table xs_tunables_table[] = {
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &xprt_min_resvport_limit,
- .extra2 = &xprt_max_resvport
+ .extra2 = &xprt_max_resvport_limit
},
{
.procname = "max_resvport",
@@ -137,7 +137,7 @@ static struct ctl_table xs_tunables_table[] = {
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
- .extra1 = &xprt_min_resvport,
+ .extra1 = &xprt_min_resvport_limit,
.extra2 = &xprt_max_resvport_limit
},
{
@@ -1615,11 +1615,17 @@ static void xs_udp_timer(struct rpc_xprt *xprt, struct rpc_task *task)
spin_unlock_bh(&xprt->transport_lock);
}
-static unsigned short xs_get_random_port(void)
+static int xs_get_random_port(void)
{
- unsigned short range = xprt_max_resvport - xprt_min_resvport + 1;
- unsigned short rand = (unsigned short) prandom_u32() % range;
- return rand + xprt_min_resvport;
+ unsigned short min = xprt_min_resvport, max = xprt_max_resvport;
+ unsigned short range;
+ unsigned short rand;
+
+ if (max < min)
+ return -EADDRINUSE;
+ range = max - min + 1;
+ rand = (unsigned short) prandom_u32() % range;
+ return rand + min;
}
/**
@@ -1675,9 +1681,9 @@ static void xs_set_srcport(struct sock_xprt *transport, struct socket *sock)
transport->srcport = xs_sock_getport(sock);
}
-static unsigned short xs_get_srcport(struct sock_xprt *transport)
+static int xs_get_srcport(struct sock_xprt *transport)
{
- unsigned short port = transport->srcport;
+ int port = transport->srcport;
if (port == 0 && transport->xprt.resvport)
port = xs_get_random_port();
@@ -1698,7 +1704,7 @@ static int xs_bind(struct sock_xprt *transport, struct socket *sock)
{
struct sockaddr_storage myaddr;
int err, nloop = 0;
- unsigned short port = xs_get_srcport(transport);
+ int port = xs_get_srcport(transport);
unsigned short last;
/*
@@ -1716,8 +1722,8 @@ static int xs_bind(struct sock_xprt *transport, struct socket *sock)
* 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;
+ if (port <= 0)
+ return port;
memcpy(&myaddr, &transport->srcaddr, transport->xprt.addrlen);
do {
@@ -3154,12 +3160,8 @@ static int param_set_uint_minmax(const char *val,
static int param_set_portnr(const char *val, const struct kernel_param *kp)
{
- if (kp->arg == &xprt_min_resvport)
- return param_set_uint_minmax(val, kp,
- RPC_MIN_RESVPORT,
- xprt_max_resvport);
return param_set_uint_minmax(val, kp,
- xprt_min_resvport,
+ RPC_MIN_RESVPORT,
RPC_MAX_RESVPORT);
}