[PATCH V2 3/5] perf tools: expose copyfile_offset()

[kan . liang]

From: Kan Liang <Kan.liang@xxxxxxxxx>

copyfile_offset could be used to merge per thread file to perf.data in
the following patch.

Signed-off-by: Kan Liang <Kan.liang@xxxxxxxxx>
---
 tools/perf/util/util.c | 2 +-
 tools/perf/util/util.h | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
index 97e0c8e..a003ce4 100644
--- a/tools/perf/util/util.c
+++ b/tools/perf/util/util.c
@@ -188,7 +188,7 @@ static int slow_copyfile(const char *from, const char *to, struct nsinfo *nsi)
 	return err;
 }
 
-static int copyfile_offset(int ifd, loff_t off_in, int ofd, loff_t off_out, u64 size)
+int copyfile_offset(int ifd, loff_t off_in, int ofd, loff_t off_out, u64 size)
 {
 	void *ptr;
 	loff_t pgoff;
diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h
index 6c7e6cc..0e1358f 100644
--- a/tools/perf/util/util.h
+++ b/tools/perf/util/util.h
@@ -5,6 +5,7 @@
 /* glibc 2.20 deprecates _BSD_SOURCE in favour of _DEFAULT_SOURCE */
 #define _DEFAULT_SOURCE 1
 
+#include <fcntl.h>
 #include <stdbool.h>
 #include <stddef.h>
 #include <stdlib.h>
@@ -34,6 +35,7 @@ bool lsdir_no_dot_filter(const char *name, struct dirent *d);
 int copyfile(const char *from, const char *to);
 int copyfile_mode(const char *from, const char *to, mode_t mode);
 int copyfile_ns(const char *from, const char *to, struct nsinfo *nsi);
+int copyfile_offset(int fromfd, loff_t from_ofs, int tofd, loff_t to_ofs, u64 size);
 
 ssize_t readn(int fd, void *buf, size_t n);
 ssize_t writen(int fd, const void *buf, size_t n);
-- 
2.7.4