I think your build system's kernel headers are old.
Linux 4.15-rc1 commit 6e71b04a82248ccf13a94b85cbc674a9fefe53f5
Author: Chenbo Feng <fengc@xxxxxxxxxx>
Date: Wed Oct 18 13:00:22 2017 -0700
bpf: Add file mode configuration into bpf maps
--- a/include/uapi/linux/bpf.h
+++ b/include/uapi/linux/bpf.h
@@ -218,6 +218,10 @@ enum bpf_attach_type {
#define BPF_OBJ_NAME_LEN 16U
+/* Flags for accessing BPF object */
+#define BPF_F_RDONLY (1U << 3)
+#define BPF_F_WRONLY (1U << 4)
+
union bpf_attr {
struct { /* anonymous struct used by BPF_MAP_CREATE command */
__u32 map_type; /* one of enum bpf_map_type */
@@ -260,6 +264,7 @@ union bpf_attr {
struct { /* anonymous struct used by BPF_OBJ_* commands */
__aligned_u64 pathname;
__u32 bpf_fd;
+ __u32 file_flags;
};
struct { /* anonymous struct used by BPF_PROG_ATTACH/DETACH commands */
On Thu, Mar 26, 2020 at 7:08 AM Maciej Żenczykowski
<zenczykowski@xxxxxxxxx> wrote:
>
> I don't get it. It builds for me.
>
> And it doesn't if I insert an intentional syntax error in the same line,
> so I'm definitely compiling exactly that code.
