diff options
| author | Hauke Mehrtens <hauke@hauke-m.de> | 2019-02-14 14:18:00 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-02-20 10:18:25 +0100 |
| commit | 0432fed9f48d6671124e19bc1b783bab2783740d (patch) | |
| tree | 1553e36bee4a2555eb34c18a825d3dd8e15896ea /include | |
| parent | bc6f7dc0b2e8bf9ad6f192d718c014e2c07ef2f1 (diff) | |
uapi/if_ether.h: prevent redefinition of struct ethhdr
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>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/uapi/linux/if_ether.h | 3 | ||||
| -rw-r--r-- | include/uapi/linux/libc-compat.h | 6 |
2 files changed, 9 insertions, 0 deletions
diff --git a/include/uapi/linux/if_ether.h b/include/uapi/linux/if_ether.h index 659b1634de61..b31e2f836317 100644 --- a/include/uapi/linux/if_ether.h +++ b/include/uapi/linux/if_ether.h @@ -22,6 +22,7 @@ #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 @@ -139,11 +140,13 @@ * 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 774cb2db1b89..7c098d68d5e5 100644 --- a/include/uapi/linux/libc-compat.h +++ b/include/uapi/linux/libc-compat.h @@ -263,4 +263,10 @@ #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 */ |