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41 lines
1.3 KiB
Diff
41 lines
1.3 KiB
Diff
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From a12326ad330c4f7cd8d2b6ae1c4fbcd952c378dc Mon Sep 17 00:00:00 2001
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From: Hauke Mehrtens <hauke@hauke-m.de>
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Date: Mon, 26 Feb 2018 17:39:09 +0100
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Subject: [PATCH] extensions: libxt_bpf: Fix build with old kernel versions
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In kernel 3.18 the union bpf_attr does not have a pathname attribute and
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BPF_OBJ_GET is also not defined in these versions.
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This was added in Linux commit b2197755b263 ("bpf: add support for
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persistent maps/progs"). Check for the BPF_FS_MAGIC define which was
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also added in this Linux commit and only activate this code in case we
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find that define.
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This fixes a build problem with Linux 3.18.
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Netfilter bug: #1231
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Fixes: f17f9ace8a8 ("extensions: libxt_bpf: support ebpf pinned objects")
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Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
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---
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extensions/libxt_bpf.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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--- a/extensions/libxt_bpf.c
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+++ b/extensions/libxt_bpf.c
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@@ -22,6 +22,7 @@
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#include <linux/bpf.h>
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#endif
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+#include <linux/magic.h>
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#include <linux/unistd.h>
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#define BCODE_FILE_MAX_LEN_B 1024
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@@ -62,7 +63,7 @@ static const struct xt_option_entry bpf_
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static int bpf_obj_get(const char *filepath)
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{
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-#if defined HAVE_LINUX_BPF_H && defined __NR_bpf
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+#if defined HAVE_LINUX_BPF_H && defined __NR_bpf && defined BPF_FS_MAGIC
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union bpf_attr attr;
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memset(&attr, 0, sizeof(attr));
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