netdev - [bpf-next PATCH 2/3] bpf: add id to prog tracepoint

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Date:   Wed, 18 Apr 2018 17:30:53 +0200
From:   Sebastiano Miano <sebastiano.miano@...ito.it>
To:     netdev@...r.kernel.org, ast@...nel.org, daniel@...earbox.net
Cc:     mingo@...hat.com, rostedt@...dmis.org, brouer@...hat.com,
        fulvio.risso@...ito.it
Subject: [bpf-next PATCH 2/3] bpf: add id to prog tracepoint

This patch adds the prog id to the bpf tracepoints
that can be used when monitoring or inspecting prog
related functions.

Signed-off-by: Sebastiano Miano <sebastiano.miano@...ito.it>
Suggested-by: Jesper Dangaard Brouer <brouer@...hat.com>
---
 include/trace/events/bpf.h |   15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/include/trace/events/bpf.h b/include/trace/events/bpf.h
index d7c9726..4ec19c5 100644
--- a/include/trace/events/bpf.h
+++ b/include/trace/events/bpf.h
@@ -65,16 +65,19 @@ DECLARE_EVENT_CLASS(bpf_prog_event,
 	TP_STRUCT__entry(
 		__array(u8, prog_tag, 8)
 		__field(u32, type)
+		__field(u32, id)
 	),
 
 	TP_fast_assign(
 		BUILD_BUG_ON(sizeof(__entry->prog_tag) != sizeof(prg->tag));
 		memcpy(__entry->prog_tag, prg->tag, sizeof(prg->tag));
 		__entry->type = prg->type;
+		__entry->id   = prg->aux->id;
 	),
 
-	TP_printk("prog=%s type=%s",
+	TP_printk("prog=%s id=%u type=%s",
 		  __print_hex_str(__entry->prog_tag, 8),
+		  __entry->id,
 		  __print_symbolic(__entry->type, __PROG_TYPE_SYM_TAB))
 );
 
@@ -102,6 +105,7 @@ TRACE_EVENT(bpf_prog_load,
 		__array(u8, prog_tag, 8)
 		__field(u32, type)
 		__field(int, ufd)
+		__field(u32, id)
 	),
 
 	TP_fast_assign(
@@ -109,10 +113,12 @@ TRACE_EVENT(bpf_prog_load,
 		memcpy(__entry->prog_tag, prg->tag, sizeof(prg->tag));
 		__entry->type = prg->type;
 		__entry->ufd  = ufd;
+		__entry->id   = prg->aux->id;
 	),
 
-	TP_printk("prog=%s type=%s ufd=%d",
+	TP_printk("prog=%s id=%u type=%s ufd=%d",
 		  __print_hex_str(__entry->prog_tag, 8),
+		  __entry->id,
 		  __print_symbolic(__entry->type, __PROG_TYPE_SYM_TAB),
 		  __entry->ufd)
 );
@@ -161,6 +167,7 @@ DECLARE_EVENT_CLASS(bpf_obj_prog,
 		__array(u8, prog_tag, 8)
 		__field(int, ufd)
 		__string(path, pname->name)
+		__field(u32, id)
 	),
 
 	TP_fast_assign(
@@ -168,10 +175,12 @@ DECLARE_EVENT_CLASS(bpf_obj_prog,
 		memcpy(__entry->prog_tag, prg->tag, sizeof(prg->tag));
 		__assign_str(path, pname->name);
 		__entry->ufd = ufd;
+		__entry->id  = prg->aux->id;
 	),
 
-	TP_printk("prog=%s path=%s ufd=%d",
+	TP_printk("prog=%s id=%u path=%s ufd=%d",
 		  __print_hex_str(__entry->prog_tag, 8),
+		  __entry->id,
 		  __get_str(path), __entry->ufd)
 );