From 70488ab7f87096534aaadd7eab30e8515ac3d60d Mon Sep 17 00:00:00 2001 From: Steven Date: Wed, 28 Mar 2018 17:59:00 -0700 Subject: bond: show trace causes a crash if the interface is deleted For the debug image, if the interface is removed and the trace was collected prior to the interface delete, show trace may cause a crash. This is because vnet_get_sw_interface_name and vnet_get_sup_hw_interface are not safe if the interface is deleted. The fix is to use format_vnet_sw_if_index_name if all we need is to get the interface name in the trace to display. It would show "DELETED" which is better than a crash. Change-Id: I912402d3e71592ece9f49d36c8a6b7af97f3b69e Signed-off-by: Steven --- src/vnet/bonding/node.c | 22 ++++++++++++++++------ 1 file changed, 16 insertions(+), 6 deletions(-) (limited to 'src/vnet/bonding/node.c') diff --git a/src/vnet/bonding/node.c b/src/vnet/bonding/node.c index 4deec829195..b831d40540e 100644 --- a/src/vnet/bonding/node.c +++ b/src/vnet/bonding/node.c @@ -50,15 +50,14 @@ format_bond_input_trace (u8 * s, va_list * args) CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); bond_packet_trace_t *t = va_arg (*args, bond_packet_trace_t *); - vnet_hw_interface_t *hw, *hw1; - vnet_main_t *vnm = vnet_get_main (); - hw = vnet_get_sup_hw_interface (vnm, t->sw_if_index); - hw1 = vnet_get_sup_hw_interface (vnm, t->bond_sw_if_index); - s = format (s, "src %U, dst %U, %s -> %s", + s = format (s, "src %U, dst %U, %U -> %U", format_ethernet_address, t->ethernet.src_address, format_ethernet_address, t->ethernet.dst_address, - hw->name, hw1->name); + format_vnet_sw_if_index_name, vnet_get_main (), + t->sw_if_index, + format_vnet_sw_if_index_name, vnet_get_main (), + t->bond_sw_if_index); return s; } @@ -382,6 +381,17 @@ bond_input_fn (vlib_main_t * vm, vlib_node_runtime_t * node, sif = bond_get_slave_by_sw_if_index (sw_if_index); bond_sw_if_index_rewrite (vm, node, sif, eth, b0); + if (PREDICT_FALSE (n_trace > 0)) + { + vlib_trace_buffer (vm, node, next0, b0, 0 /* follow_chain */ ); + vlib_set_trace_count (vm, node, --n_trace); + t0 = vlib_add_trace (vm, node, b0, sizeof (*t0)); + t0->ethernet = *eth; + t0->sw_if_index = sw_if_index; + t0->bond_sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX]; + + } + VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0); /* verify speculative enqueue, maybe switch current next frame */ -- cgit 1.2.3-korg