linux-kernel - [PATCH 1/1 v2] perf augmented_raw_syscalls.bpf: Move 'struct timespec64' to vmlinux.h

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Message-ID: <Zc_fp6CgDClPhS_O@x1>
Date: Fri, 16 Feb 2024 19:20:23 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Namhyung Kim <namhyung@...nel.org>
Cc: Adrian Hunter <adrian.hunter@...el.com>,
	Ian Rogers <irogers@...gle.com>, Jiri Olsa <jolsa@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-perf-users@...r.kernel.org
Subject: [PATCH 1/1 v2] perf augmented_raw_syscalls.bpf: Move 'struct
 timespec64' to vmlinux.h

If we instead decide to generate vmlinux.h from BTF info, it will be
there:

  $ pahole timespec64
  struct timespec64 {
  	time64_t                   tv_sec;               /*     0     8 */
  	long int                   tv_nsec;              /*     8     8 */

  	/* size: 16, cachelines: 1, members: 2 */
  	/* last cacheline: 16 bytes */
  };

  $

pahole manages to find it from /sys/kernel/btf/vmlinux, that is
generated from the kernel types.

With this linux/bpf.h doesn't need to be included, as its already in the
minimalistic tools/perf/util/bpf_skel/vmlinux/vmlinux.h file or what we
need comes when generating a vmlinux.h file from BTF info, i.e. when
using GEN_VMLINUX_H=1, as noticed by Namyung in a build break before
removing linux/bpf.h.

Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: Ian Rogers <irogers@...gle.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Link: https://lore.kernel.org/lkml/Zc-gAKByhLBV_X59@x1
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---

v2: Remove linux/bpf.h as explained in the commit log message.

---
 .../util/bpf_skel/augmented_raw_syscalls.bpf.c    | 15 +--------------
 tools/perf/util/bpf_skel/vmlinux/vmlinux.h        |  7 +++++++
 2 files changed, 8 insertions(+), 14 deletions(-)

diff --git a/tools/perf/util/bpf_skel/augmented_raw_syscalls.bpf.c b/tools/perf/util/bpf_skel/augmented_raw_syscalls.bpf.c
index baecffbece14fb68..0acbd74e8c760956 100644
--- a/tools/perf/util/bpf_skel/augmented_raw_syscalls.bpf.c
+++ b/tools/perf/util/bpf_skel/augmented_raw_syscalls.bpf.c
@@ -6,7 +6,7 @@
  * payload expected by the 'perf trace' beautifiers.
  */
 
-#include <linux/bpf.h>
+#include "vmlinux.h"
 #include <bpf/bpf_helpers.h>
 #include <linux/limits.h>
 
@@ -22,19 +22,6 @@
 
 #define MAX_CPUS  4096
 
-// FIXME: These should come from system headers
-#ifndef bool
-typedef char bool;
-#endif
-typedef int pid_t;
-typedef long long int __s64;
-typedef __s64 time64_t;
-
-struct timespec64 {
-	time64_t	tv_sec;
-	long int	tv_nsec;
-};
-
 /* bpf-output associated map */
 struct __augmented_syscalls__ {
 	__uint(type, BPF_MAP_TYPE_PERF_EVENT_ARRAY);
diff --git a/tools/perf/util/bpf_skel/vmlinux/vmlinux.h b/tools/perf/util/bpf_skel/vmlinux/vmlinux.h
index ab84a6e1da5eedb3..e9028235d7717b59 100644
--- a/tools/perf/util/bpf_skel/vmlinux/vmlinux.h
+++ b/tools/perf/util/bpf_skel/vmlinux/vmlinux.h
@@ -20,6 +20,13 @@ typedef __s64 s64;
 
 typedef int pid_t;
 
+typedef __s64 time64_t;
+
+struct timespec64 {
+        time64_t        tv_sec;
+        long int        tv_nsec;
+};
+
 enum cgroup_subsys_id {
 	perf_event_cgrp_id  = 8,
 };
-- 
2.43.0