vlib: add flag to explicitelly mark nodes which can init per-node packet trace

Type: feature

Change-Id: I913f08383ee1c24d610c3d2aac07cef402570e2c
Signed-off-by: Damjan Marion <damarion@cisco.com>

src/plugins/avf/input.c

@@ -468,6 +468,7 @@ VLIB_REGISTER_NODE (avf_input_node) = {
   .state = VLIB_NODE_STATE_DISABLED,
   .n_errors = AVF_INPUT_N_ERROR,
   .error_strings = avf_input_error_strings,
+  .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
 };
 
 /* *INDENT-ON* */

src/plugins/dpdk/device/node.c

@@ -478,6 +478,7 @@ VLIB_REGISTER_NODE (dpdk_input_node) = {
   .type = VLIB_NODE_TYPE_INPUT,
   .name = "dpdk-input",
   .sibling_of = "device-input",
+  .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
 
   /* Will be enabled if/when hardware is detected. */
   .state = VLIB_NODE_STATE_DISABLED,

src/plugins/dpdk/ipsec/crypto_node.c

@@ -303,6 +303,7 @@ VLIB_NODE_FN (dpdk_crypto_input_node) (vlib_main_t * vm,
 VLIB_REGISTER_NODE (dpdk_crypto_input_node) =
 {
   .name = "dpdk-crypto-input",
+  .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
   .format_trace = format_dpdk_crypto_input_trace,
   .type = VLIB_NODE_TYPE_INPUT,
   .state = VLIB_NODE_STATE_DISABLED,

src/plugins/ixge/ixge.c

@@ -2219,6 +2219,7 @@ VLIB_REGISTER_NODE (ixge_input_node, static) = {
   .function = ixge_input,
   .type = VLIB_NODE_TYPE_INPUT,
   .name = "ixge-input",
+  .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
 
   /* Will be enabled if/when hardware is detected. */
   .state = VLIB_NODE_STATE_DISABLED,

src/plugins/marvell/pp2/input.c

@@ -374,6 +374,7 @@ mrvl_pp2_input_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
 /* *INDENT-OFF* */
 VLIB_REGISTER_NODE (mrvl_pp2_input_node) = {
   .function = mrvl_pp2_input_fn,
+  .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
   .name = "mrvl-pp2-input",
   .sibling_of = "device-input",
   .format_trace = format_mrvl_pp2_input_trace,

src/plugins/memif/node.c

@@ -925,6 +925,7 @@ VLIB_NODE_FN (memif_input_node) (vlib_main_t * vm,
 /* *INDENT-OFF* */
 VLIB_REGISTER_NODE (memif_input_node) = {
   .name = "memif-input",
+  .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
   .sibling_of = "device-input",
   .format_trace = format_memif_input_trace,
   .type = VLIB_NODE_TYPE_INPUT,

src/plugins/rdma/input.c

@@ -360,6 +360,7 @@ VLIB_NODE_FN (rdma_input_node) (vlib_main_t * vm,
 /* *INDENT-OFF* */
 VLIB_REGISTER_NODE (rdma_input_node) = {
   .name = "rdma-input",
+  .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
   .sibling_of = "device-input",
   .format_trace = format_rdma_input_trace,
   .type = VLIB_NODE_TYPE_INPUT,

src/plugins/vmxnet3/input.c

@@ -481,6 +481,7 @@ VLIB_NODE_FN (vmxnet3_input_node) (vlib_main_t * vm,
 VLIB_REGISTER_NODE (vmxnet3_input_node) = {
   .name = "vmxnet3-input",
   .sibling_of = "device-input",
+  .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
   .format_trace = format_vmxnet3_input_trace,
   .type = VLIB_NODE_TYPE_INPUT,
   .state = VLIB_NODE_STATE_DISABLED,

src/vlib/handoff_trace.c

@@ -79,6 +79,7 @@ typedef enum
 VLIB_REGISTER_NODE (handoff_trace_node, static) =
 {
   .name = "handoff_trace",
+  .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
   .function = handoff_trace_node_fn,
   .vector_size = sizeof (u32),
   .format_trace = format_handoff_trace,

src/vlib/node.h

@@ -303,6 +303,7 @@ typedef struct vlib_node_t
 
 #define VLIB_NODE_FLAG_SWITCH_FROM_INTERRUPT_TO_POLLING_MODE (1 << 6)
 #define VLIB_NODE_FLAG_SWITCH_FROM_POLLING_TO_INTERRUPT_MODE (1 << 7)
+#define VLIB_NODE_FLAG_TRACE_SUPPORTED (1 << 8)
 
   /* State for input nodes. */
   u8 state;

src/vlib/trace.c

@@ -357,6 +357,7 @@ cli_add_trace_buffer (vlib_main_t * vm,
 {
   unformat_input_t _line_input, *line_input = &_line_input;
   vlib_trace_main_t *tm;
+  vlib_node_t *node;
   vlib_trace_node_t *tn;
   u32 node_index, add;
   u8 verbose = 0;
@@ -383,6 +384,17 @@ cli_add_trace_buffer (vlib_main_t * vm,
 	}
     }
 
+  node = vlib_get_node (vm, node_index);
+
+  if ((node->flags & VLIB_NODE_FLAG_TRACE_SUPPORTED) == 0)
+    {
+      error = clib_error_create ("node '%U' doesn't support per-node "
+				 "tracing. There may be another way to "
+				 "initiate trace on this node.",
+				 format_vlib_node_name, vm, node_index);
+      goto done;
+    }
+
   /* *INDENT-OFF* */
   foreach_vlib_main ((
     {

src/vnet/bonding/device.c

@@ -790,6 +790,7 @@ bond_process (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f)
 /* *INDENT-OFF* */
 VLIB_REGISTER_NODE (bond_process_node) = {
   .function = bond_process,
+  .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
   .type = VLIB_NODE_TYPE_PROCESS,
   .name = "bond-process",
 };

src/vnet/devices/af_packet/node.c

@@ -369,6 +369,7 @@ VLIB_NODE_FN (af_packet_input_node) (vlib_main_t * vm,
 /* *INDENT-OFF* */
 VLIB_REGISTER_NODE (af_packet_input_node) = {
   .name = "af-packet-input",
+  .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
   .sibling_of = "device-input",
   .format_trace = format_af_packet_input_trace,
   .type = VLIB_NODE_TYPE_INPUT,

src/vnet/devices/netmap/node.c

@@ -278,6 +278,7 @@ VLIB_NODE_FN (netmap_input_node) (vlib_main_t * vm,
 VLIB_REGISTER_NODE (netmap_input_node) = {
   .name = "netmap-input",
   .sibling_of = "device-input",
+  .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
   .format_trace = format_netmap_input_trace,
   .type = VLIB_NODE_TYPE_INPUT,
   /* default state is INTERRUPT mode, switch to POLLING if worker threads are enabled */

src/vnet/devices/virtio/node.c

@@ -398,6 +398,7 @@ VLIB_REGISTER_NODE (virtio_input_node) = {
   .name = "virtio-input",
   .sibling_of = "device-input",
   .format_trace = format_virtio_input_trace,
+  .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
   .type = VLIB_NODE_TYPE_INPUT,
   .state = VLIB_NODE_STATE_INTERRUPT,
   .n_errors = VIRTIO_INPUT_N_ERROR,

src/vnet/devices/virtio/vhost_user_input.c

@@ -794,6 +794,7 @@ VLIB_REGISTER_NODE (vhost_user_input_node) = {
   .type = VLIB_NODE_TYPE_INPUT,
   .name = "vhost-user-input",
   .sibling_of = "device-input",
+  .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
 
   /* Will be enabled if/when hardware is detected. */
   .state = VLIB_NODE_STATE_DISABLED,

src/vnet/ethernet/p2p_ethernet_input.c

@@ -237,6 +237,7 @@ VLIB_REGISTER_NODE (p2p_ethernet_input_node) = {
   .vector_size = sizeof (u32),
   .format_trace = format_p2p_ethernet_trace,
   .type = VLIB_NODE_TYPE_INTERNAL,
+  .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
 
   .n_errors = ARRAY_LEN(p2p_ethernet_error_strings),
   .error_strings = p2p_ethernet_error_strings,

src/vnet/ip/punt_node.c

@@ -621,6 +621,7 @@ VLIB_REGISTER_NODE (punt_socket_rx_node) =
 {
  .function = punt_socket_rx,
  .name = "punt-socket-rx",
+ .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
  .type = VLIB_NODE_TYPE_INPUT,
  .state = VLIB_NODE_STATE_INTERRUPT,
  .vector_size = 1,

src/vnet/pg/input.c

@@ -1797,6 +1797,7 @@ pg_input (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
 /* *INDENT-OFF* */
 VLIB_REGISTER_NODE (pg_input_node) = {
   .function = pg_input,
+  .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
   .name = "pg-input",
   .sibling_of = "device-input",
   .type = VLIB_NODE_TYPE_INPUT,

src/vnet/session/session_node.c

@@ -1339,6 +1339,7 @@ session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
 VLIB_REGISTER_NODE (session_queue_node) =
 {
   .function = session_queue_node_fn,
+  .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
   .name = "session-queue",
   .format_trace = format_session_queue_trace,
   .type = VLIB_NODE_TYPE_INPUT,

src/vnet/unix/tuntap.c

@@ -398,6 +398,7 @@ static char *tuntap_rx_error_strings[] = {
 /* *INDENT-OFF* */
 VLIB_REGISTER_NODE (tuntap_rx_node,static) = {
   .function = tuntap_rx,
+  .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
   .name = "tuntap-rx",
   .sibling_of = "device-input",
   .type = VLIB_NODE_TYPE_INPUT,