From: Arnaldo Carvalho de Melo <acme@kernel.org>
Date: Thu, 21 Mar 2024 16:01:58 +0000 (-0300)
Subject: libbpf: Define MFD_CLOEXEC if not available
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=ddb2ffdc474a3000887dc776b971d04bde29decc;p=linux.git

libbpf: Define MFD_CLOEXEC if not available

Since its going directly to the syscall to avoid not having
memfd_create() available in some systems, do the same for its
MFD_CLOEXEC flags, defining it if not available.

This fixes the build in those systems, noticed while building perf on a
set of build containers.

Fixes: 9fa5e1a180aa639f ("libbpf: Call memfd_create() syscall directly")
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/ZfxZ9nCyKvwmpKkE@x1
---

diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 1e3e697b98bca..a2061fcd612d7 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -1650,6 +1650,10 @@ static int sys_memfd_create(const char *name, unsigned flags)
 	return syscall(__NR_memfd_create, name, flags);
 }
 
+#ifndef MFD_CLOEXEC
+#define MFD_CLOEXEC 0x0001U
+#endif
+
 static int create_placeholder_fd(void)
 {
 	int fd;