From: Hauke Mehrtens hauke@hauke-m.de

commit 6926e041a8920c8ec27e4e155efa760aa01551fd upstream.

Musl provides its own ethhdr struct definition. Add a guard to prevent its definition of the appropriate musl header has already been included.

glibc does not implement this header, but when glibc will implement this they can just define __UAPI_DEF_ETHHDR 0 to make it work with the kernel.

Signed-off-by: Hauke Mehrtens hauke@hauke-m.de Signed-off-by: David S. Miller davem@davemloft.net --- - This is upstream in v4.15 - This should be applied for stable v4.14.y and v4.9.y --- include/uapi/linux/if_ether.h | 3 +++ include/uapi/linux/libc-compat.h | 6 ++++++ 2 files changed, 9 insertions(+)

diff --git a/include/uapi/linux/if_ether.h b/include/uapi/linux/if_ether.h index 244e3213ecb0..60ec9114e28f 100644 --- a/include/uapi/linux/if_ether.h +++ b/include/uapi/linux/if_ether.h @@ -23,6 +23,7 @@ #define _UAPI_LINUX_IF_ETHER_H

#include <linux/types.h> +#include <linux/libc-compat.h>

/* * IEEE 802.3 Ethernet magic constants. The frame sizes omit the preamble @@ -150,11 +151,13 @@ * This is an Ethernet frame header. */

+#if __UAPI_DEF_ETHHDR struct ethhdr { unsigned char h_dest[ETH_ALEN]; /* destination eth addr */ unsigned char h_source[ETH_ALEN]; /* source ether addr */ __be16 h_proto; /* packet type ID field */ } __attribute__((packed)); +#endif

#endif /* _UAPI_LINUX_IF_ETHER_H */ diff --git a/include/uapi/linux/libc-compat.h b/include/uapi/linux/libc-compat.h index 8254c937c9f4..fc29efaa918c 100644 --- a/include/uapi/linux/libc-compat.h +++ b/include/uapi/linux/libc-compat.h @@ -264,4 +264,10 @@

#endif /* __GLIBC__ */

+/* Definitions for if_ether.h */ +/* allow libcs like musl to deactivate this, glibc does not implement this. */ +#ifndef __UAPI_DEF_ETHHDR +#define __UAPI_DEF_ETHHDR 1 +#endif + #endif /* _UAPI_LIBC_COMPAT_H */