[PATCH v2 bpf-next 1/2] xdp: Add tracepoint for bulk XDP_TX

[Toshiaki Makita <toshiaki.makita1@gmail.com>]

This is introduced for admins to check what is happening on XDP_TX when
bulk XDP_TX is in use, which will be first introduced in veth in next
commit.

Signed-off-by: Toshiaki Makita <toshiaki.makita1@gmail.com>
---
 include/trace/events/xdp.h | 25 +++++++++++++++++++++++++
 kernel/bpf/core.c          |  1 +
 2 files changed, 26 insertions(+)

diff --git a/include/trace/events/xdp.h b/include/trace/events/xdp.h
index e95cb86..e06ea65 100644
--- a/include/trace/events/xdp.h
+++ b/include/trace/events/xdp.h
@@ -50,6 +50,31 @@
 		  __entry->ifindex)
 );
 
+TRACE_EVENT(xdp_bulk_tx,
+
+	TP_PROTO(const struct net_device *dev,
+		 int sent, int drops, int err),
+
+	TP_ARGS(dev, sent, drops, err),
+
+	TP_STRUCT__entry(
+		__field(int, ifindex)
+		__field(int, drops)
+		__field(int, sent)
+		__field(int, err)
+	),
+
+	TP_fast_assign(
+		__entry->ifindex	= dev->ifindex;
+		__entry->drops		= drops;
+		__entry->sent		= sent;
+		__entry->err		= err;
+	),
+
+	TP_printk("ifindex=%d sent=%d drops=%d err=%d",
+		  __entry->ifindex, __entry->sent, __entry->drops, __entry->err)
+);
+
 DECLARE_EVENT_CLASS(xdp_redirect_template,
 
 	TP_PROTO(const struct net_device *dev,
diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c
index 33fb292..3a3f4af 100644
--- a/kernel/bpf/core.c
+++ b/kernel/bpf/core.c
@@ -2106,3 +2106,4 @@ int __weak skb_copy_bits(const struct sk_buff *skb, int offset, void *to,
 #include <linux/bpf_trace.h>
 
 EXPORT_TRACEPOINT_SYMBOL_GPL(xdp_exception);
+EXPORT_TRACEPOINT_SYMBOL_GPL(xdp_bulk_tx);
-- 
1.8.3.1