[PATCH 39/40] vdpa: add trace events for vhost_vdpa_net_load_cmd

[Si-Wei Liu]

For better debuggability and observability.

Signed-off-by: Si-Wei Liu <si-wei....@oracle.com>
---
 net/trace-events | 2 ++
 net/vhost-vdpa.c | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/net/trace-events b/net/trace-events
index d650c71..be087e6 100644
--- a/net/trace-events
+++ b/net/trace-events
@@ -28,3 +28,5 @@ colo_filter_rewriter_conn_offset(uint32_t offset) ": 
offset=%u"
 vhost_vdpa_set_address_space_id(void *v, unsigned vq_group, unsigned asid_num) 
"vhost_vdpa: %p vq_group: %u asid: %u"
 vhost_vdpa_net_data_eval_flush(void *s, int qindex, int svq_switch, bool 
svq_flush) "vhost_vdpa: %p qp: %d svq_switch: %d flush_map: %d"
 vhost_vdpa_net_cvq_eval_flush(void *s, int qindex, int svq_switch, bool 
svq_flush) "vhost_vdpa: %p qp: %d svq_switch: %d flush_map: %d"
+vhost_vdpa_net_load_cmd(void *s, uint8_t class, uint8_t cmd, int data_num, int 
data_size) "vdpa state: %p class: %u cmd: %u sg_num: %d size: %d"
+vhost_vdpa_net_load_cmd_retval(void *s, uint8_t class, uint8_t cmd, int r) 
"vdpa state: %p class: %u cmd: %u retval: %d"
diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c
index a0bd8cd..61da8b4 100644
--- a/net/vhost-vdpa.c
+++ b/net/vhost-vdpa.c
@@ -885,6 +885,7 @@ static ssize_t vhost_vdpa_net_load_cmd(VhostVDPAState *s,
 
     assert(data_size < vhost_vdpa_net_cvq_cmd_page_len() - sizeof(ctrl));
     cmd_size = sizeof(ctrl) + data_size;
+    trace_vhost_vdpa_net_load_cmd(s, class, cmd, data_num, data_size);
     if (vhost_svq_available_slots(svq) < 2 ||
         iov_size(out_cursor, 1) < cmd_size) {
         /*
@@ -916,6 +917,7 @@ static ssize_t vhost_vdpa_net_load_cmd(VhostVDPAState *s,
 
     r = vhost_vdpa_net_cvq_add(s, &out, 1, &in, 1);
     if (unlikely(r < 0)) {
+        trace_vhost_vdpa_net_load_cmd_retval(s, class, cmd, r);
         return r;
     }
 
-- 
1.8.3.1