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macsec_linux: Hardware offload requires Linux headers >= v5.7

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Hardware offload in Linux macsec driver is enabled in compile time if
libnl version is >= v3.6. This is not sufficient for successful build
since enum 'macsec_offload' has been added to Linux header if_link.h
in kernels v5.6 and v5.7, see commits:
- 21114b7fee
- 76564261a7

New libnl with older Linux headers is a valid combination. This is how
hostapd build failure has been detected by Buildroot autobuilder, see:
- http://autobuild.buildroot.net/results/b59d5bc5bd17683a3a1e3577c40c802e81911f84/

Extend compile time condition for the enablement of the macsec hardware
offload adding Linux headers version check.

Fixes: 40c1396644 ("macsec_linux: Add support for MACsec hardware offload")
Signed-off-by: Sergey Matyukevich <geomatsi@gmail.com>
This commit is contained in:
Sergey Matyukevich 2024-08-22 00:03:41 +03:00 committed by Jouni Malinen
parent 3ab781fb29
commit 809d9d8172
1 changed files with 3 additions and 1 deletions
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4
src/drivers/driver_macsec_linux.c
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@ -19,6 +19,7 @@
#include <netlink/route/link.h>
#include <netlink/route/link/macsec.h>
#include <linux/if_macsec.h>
#include <linux/version.h>
#include <inttypes.h>
#include "utils/common.h"
@ -32,7 +33,8 @@
#define UNUSED_SCI 0xffffffffffffffff
#if LIBNL_VER_NUM >= LIBNL_VER(3, 6)
#if (LIBNL_VER_NUM >= LIBNL_VER(3, 6) && \
LINUX_VERSION_CODE >= KERNEL_VERSION(5, 7, 0))
#define LIBNL_HAS_OFFLOAD
#endif