[PATCH 1/1] perf kwork_trace.bpf: Stop using vmlinux.h, grab copies of used structs

[Arnaldo Carvalho de Melo]

And mark them with __attribute__((preserve_access_index)) so that
libbpf's CO-RE code can fixup offsets if they differ with the kernel
data structure.

Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/util/bpf_skel/kwork_trace.bpf.c | 70 +++++++++++++++++++++-
 1 file changed, 69 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/bpf_skel/kwork_trace.bpf.c b/tools/perf/util/bpf_skel/kwork_trace.bpf.c
index 063c124e099938ed..e38fe54c7667fa74 100644
--- a/tools/perf/util/bpf_skel/kwork_trace.bpf.c
+++ b/tools/perf/util/bpf_skel/kwork_trace.bpf.c
@@ -1,13 +1,81 @@
 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
 // Copyright (c) 2022, Huawei
 
-#include "vmlinux.h"
+#include <linux/bpf.h>
 #include <bpf/bpf_helpers.h>
 #include <bpf/bpf_tracing.h>
 
 #define KWORK_COUNT 100
 #define MAX_KWORKNAME 128
 
+
+// non-UAPI kernel data structures, just the fields used in this tool,
+// preserving the access index so that libbpf can fixup offsets with the ones
+// used in the kernel when loading the BPF bytecode, if they differ from what
+// is used here.
+
+enum {
+	HI_SOFTIRQ = 0,
+	TIMER_SOFTIRQ,
+	NET_TX_SOFTIRQ,
+	NET_RX_SOFTIRQ,
+	BLOCK_SOFTIRQ,
+	IRQ_POLL_SOFTIRQ,
+	TASKLET_SOFTIRQ,
+	SCHED_SOFTIRQ,
+	HRTIMER_SOFTIRQ,
+	RCU_SOFTIRQ,    /* Preferable RCU should always be the last softirq */
+
+	NR_SOFTIRQS
+};
+
+struct trace_entry {
+	short unsigned int type;
+	unsigned char	   flags;
+	unsigned char	   preempt_count;
+	int		   pid;
+} __attribute__((preserve_access_index));
+
+struct trace_event_raw_irq_handler_entry {
+	struct trace_entry ent;
+	int		   irq;
+	__u32		   __data_loc_name;
+	char		   __data[];
+} __attribute__((preserve_access_index));
+
+struct trace_event_raw_irq_handler_exit {
+	struct trace_entry ent;
+	int		   irq;
+	int		   ret;
+	char		   __data[];
+} __attribute__((preserve_access_index));
+
+struct trace_event_raw_softirq {
+	struct trace_entry ent;
+	unsigned int	   vec;
+	char		   __data[];
+} __attribute__((preserve_access_index));
+
+struct trace_event_raw_workqueue_execute_start {
+	struct trace_entry ent;
+	void		   *work;
+	void		   *function;
+	char		   __data[];
+} __attribute__((preserve_access_index));
+
+struct trace_event_raw_workqueue_execute_end {
+	struct trace_entry ent;
+	void		   *work;
+	void		   *function;
+	char		  __data[];
+} __attribute__((preserve_access_index));
+
+struct trace_event_raw_workqueue_activate_work {
+	struct trace_entry ent;
+	void		   *work;
+	char		   __data[];
+} __attribute__((preserve_access_index));
+
 /*
  * This should be in sync with "util/kwork.h"
  */
-- 
2.39.2