perf beauty: Move uapi/linux/fs.h copy out of the directory used to build perf

It is mostly used only to generate string tables, not to build perf, so
move it to the tools/perf/trace/beauty/include/ hierarchy, that is used
just for scraping.

The only case where it was being used to build was in
tools/perf/trace/beauty/sync_file_range.c, because some older systems
doesn't have the SYNC_FILE_RANGE_WRITE_AND_WAIT define, just use the
system's linux/fs.h header instead, defining it if not available.

This is a something that should've have happened, as happened with the
linux/socket.h scrapper, do it now as Ian suggested while doing an
audit/refactor session in the headers used by perf.

No other tools/ living code uses it, just <linux/fs.h> coming from
either 'make install_headers' or from the system /usr/include/
directory.

Suggested-by: Ian Rogers <irogers@google.com>
Reviewed-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/lkml/CAP-5=fWZVrpRufO4w-S4EcSi9STXcTAN2ERLwTSN7yrSSA-otQ@mail.gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/Makefile.perf

@@ -472,6 +472,7 @@ arm64-sysreg-defs-clean:
 		clean > /dev/null
 
 beauty_linux_dir := $(srctree)/tools/perf/trace/beauty/include/linux/
+beauty_uapi_linux_dir := $(srctree)/tools/perf/trace/beauty/include/uapi/linux/
 linux_uapi_dir := $(srctree)/tools/include/uapi/linux
 asm_generic_uapi_dir := $(srctree)/tools/include/uapi/asm-generic
 arch_asm_uapi_dir := $(srctree)/tools/arch/$(SRCARCH)/include/uapi/asm/
@@ -647,8 +648,8 @@ $(x86_arch_MSRs_array): $(x86_arch_asm_dir)/msr-index.h $(x86_arch_MSRs_tbl)
 rename_flags_array := $(beauty_outdir)/rename_flags_array.c
 rename_flags_tbl := $(srctree)/tools/perf/trace/beauty/rename_flags.sh
 
-$(rename_flags_array): $(linux_uapi_dir)/fs.h $(rename_flags_tbl)
-	$(Q)$(SHELL) '$(rename_flags_tbl)' $(linux_uapi_dir) > $@
+$(rename_flags_array): $(beauty_uapi_linux_dir)/fs.h $(rename_flags_tbl)
+	$(Q)$(SHELL) '$(rename_flags_tbl)' $(beauty_uapi_linux_dir) > $@
 
 arch_errno_name_array := $(beauty_outdir)/arch_errno_name_array.c
 arch_errno_hdr_dir := $(srctree)/tools
@@ -660,8 +661,8 @@ $(arch_errno_name_array): $(arch_errno_tbl)
 sync_file_range_arrays := $(beauty_outdir)/sync_file_range_arrays.c
 sync_file_range_tbls := $(srctree)/tools/perf/trace/beauty/sync_file_range.sh
 
-$(sync_file_range_arrays): $(linux_uapi_dir)/fs.h $(sync_file_range_tbls)
-	$(Q)$(SHELL) '$(sync_file_range_tbls)' $(linux_uapi_dir) > $@
+$(sync_file_range_arrays): $(beauty_uapi_linux_dir)/fs.h $(sync_file_range_tbls)
+	$(Q)$(SHELL) '$(sync_file_range_tbls)' $(beauty_uapi_linux_dir) > $@
 
 TESTS_CORESIGHT_DIR := $(srctree)/tools/perf/tests/shell/coresight
 

tools/perf/check-headers.sh

@@ -11,7 +11,6 @@ FILES=(
   "include/uapi/drm/i915_drm.h"
   "include/uapi/linux/fadvise.h"
   "include/uapi/linux/fcntl.h"
-  "include/uapi/linux/fs.h"
   "include/uapi/linux/fscrypt.h"
   "include/uapi/linux/kcmp.h"
   "include/uapi/linux/kvm.h"
@@ -98,6 +97,7 @@ SYNC_CHECK_FILES=(
 declare -a BEAUTY_FILES
 BEAUTY_FILES=(
   "include/linux/socket.h"
+  "include/uapi/linux/fs.h"
 )
 
 declare -a FAILURES

tools/perf/trace/beauty/rename_flags.sh

@@ -2,7 +2,7 @@
 # Copyright (C) 2018, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
 # SPDX-License-Identifier: LGPL-2.1
 
-[ $# -eq 1 ] && header_dir=$1 || header_dir=tools/include/uapi/linux/
+[ $# -eq 1 ] && header_dir=$1 || header_dir=tools/perf/trace/beauty/include/uapi/linux/
 
 fs_header=${header_dir}/fs.h
 

tools/perf/trace/beauty/sync_file_range.c

@@ -7,7 +7,16 @@
 
 #include "trace/beauty/beauty.h"
 #include <linux/log2.h>
-#include <uapi/linux/fs.h>
+#include <linux/fs.h>
+
+#ifndef SYNC_FILE_RANGE_WRITE_AND_WAIT
+#define SYNC_FILE_RANGE_WAIT_BEFORE     1
+#define SYNC_FILE_RANGE_WRITE           2
+#define SYNC_FILE_RANGE_WAIT_AFTER      4
+#define SYNC_FILE_RANGE_WRITE_AND_WAIT  (SYNC_FILE_RANGE_WRITE | \
+                                         SYNC_FILE_RANGE_WAIT_BEFORE | \
+                                         SYNC_FILE_RANGE_WAIT_AFTER)
+#endif
 
 static size_t sync_file_range__scnprintf_flags(unsigned long flags, char *bf, size_t size, bool show_prefix)
 {

tools/perf/trace/beauty/sync_file_range.sh

@@ -2,7 +2,7 @@
 # SPDX-License-Identifier: LGPL-2.1
 
 if [ $# -ne 1 ] ; then
-	linux_header_dir=tools/include/uapi/linux
+	linux_header_dir=tools/perf/trace/beauty/include/uapi/linux/
 else
 	linux_header_dir=$1
 fi