From 860e9d328fa585aafda2ef09aa1b13986279cbe7 Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Fri, 25 Sep 2020 17:56:41 -0700 Subject: [PATCH] netdevsim: add warnings on unexpected UDP tunnel port errors We should never see a removal of a port which is not in the table or adding a port to an occupied entry in the table. To make sure such errors don't escape the checks in the test script add a warning/kernel spat. Error injection will not trigger those, nor should it ever put us in a bad state. Signed-off-by: Jakub Kicinski Signed-off-by: David S. Miller --- drivers/net/netdevsim/udp_tunnels.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/drivers/net/netdevsim/udp_tunnels.c b/drivers/net/netdevsim/udp_tunnels.c index 22c06a76033c..ad65b860bd7b 100644 --- a/drivers/net/netdevsim/udp_tunnels.c +++ b/drivers/net/netdevsim/udp_tunnels.c @@ -22,11 +22,13 @@ nsim_udp_tunnel_set_port(struct net_device *dev, unsigned int table, msleep(ns->udp_ports.sleep); if (!ret) { - if (ns->udp_ports.ports[table][entry]) + if (ns->udp_ports.ports[table][entry]) { + WARN(1, "entry already in use\n"); ret = -EBUSY; - else + } else { ns->udp_ports.ports[table][entry] = be16_to_cpu(ti->port) << 16 | ti->type; + } } netdev_info(dev, "set [%d, %d] type %d family %d port %d - %d\n", @@ -50,10 +52,13 @@ nsim_udp_tunnel_unset_port(struct net_device *dev, unsigned int table, if (!ret) { u32 val = be16_to_cpu(ti->port) << 16 | ti->type; - if (val == ns->udp_ports.ports[table][entry]) + if (val == ns->udp_ports.ports[table][entry]) { ns->udp_ports.ports[table][entry] = 0; - else + } else { + WARN(1, "entry not installed %x vs %x\n", + val, ns->udp_ports.ports[table][entry]); ret = -ENOENT; + } } netdev_info(dev, "unset [%d, %d] type %d family %d port %d - %d\n",