Commit d11ae1b1 authored by Jiri Olsa's avatar Jiri Olsa Committed by Daniel Borkmann

selftests/bpf: Fix d_path test

Recent commit [1] broke d_path test, because now filp_close is not called
directly from sys_close, but eventually later when the file is finally
released.

As suggested by Hou Tao we don't need to re-hook the bpf program, but just
instead we can use sys_close_range to trigger filp_close synchronously.

  [1] 021a160a ("fs: use __fput_sync in close(2)")
Suggested-by: default avatarHou Tao <houtao@huaweicloud.com>
Signed-off-by: default avatarJiri Olsa <jolsa@kernel.org>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20230831141103.359810-1-jolsa@kernel.org
parent 121fd33b
......@@ -12,6 +12,17 @@
#include "test_d_path_check_rdonly_mem.skel.h"
#include "test_d_path_check_types.skel.h"
/* sys_close_range is not around for long time, so let's
* make sure we can call it on systems with older glibc
*/
#ifndef __NR_close_range
#ifdef __alpha__
#define __NR_close_range 546
#else
#define __NR_close_range 436
#endif
#endif
static int duration;
static struct {
......@@ -90,7 +101,11 @@ static int trigger_fstat_events(pid_t pid)
fstat(indicatorfd, &fileStat);
out_close:
/* triggers filp_close */
/* sys_close no longer triggers filp_close, but we can
* call sys_close_range instead which still does
*/
#define close(fd) syscall(__NR_close_range, fd, fd, 0)
close(pipefd[0]);
close(pipefd[1]);
close(sockfd);
......@@ -98,6 +113,8 @@ static int trigger_fstat_events(pid_t pid)
close(devfd);
close(localfd);
close(indicatorfd);
#undef close
return ret;
}
......
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