git.openwrt.org Git - openwrt/staging/mans0n.git/blob

   1 From a12326ad330c4f7cd8d2b6ae1c4fbcd952c378dc Mon Sep 17 00:00:00 2001
   2 From: Hauke Mehrtens <hauke@hauke-m.de>
   3 Date: Mon, 26 Feb 2018 17:39:09 +0100
   4 Subject: [PATCH] extensions: libxt_bpf: Fix build with old kernel versions
   5
   6 In kernel 3.18 the union bpf_attr does not have a pathname attribute and
   7 BPF_OBJ_GET is also not defined in these versions.
   8 This was added in Linux commit b2197755b263 ("bpf: add support for
   9 persistent maps/progs"). Check for the BPF_FS_MAGIC define which was
  10 also added in this Linux commit and only activate this code in case we
  11 find that define.
  12
  13 This fixes a build problem with Linux 3.18.
  14 Netfilter bug: #1231
  15
  16 Fixes: f17f9ace8a8 ("extensions: libxt_bpf: support ebpf pinned objects")
  17 Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
  18 ---
  19  extensions/libxt_bpf.c | 3 ++-
  20  1 file changed, 2 insertions(+), 1 deletion(-)
  21
  22 --- a/extensions/libxt_bpf.c
  23 +++ b/extensions/libxt_bpf.c
  24 @@ -22,6 +22,7 @@
  25  #include <linux/bpf.h>
  26  #endif
  27
  28 +#include <linux/magic.h>
  29  #include <linux/unistd.h>
  30
  31  #define BCODE_FILE_MAX_LEN_B   1024
  32 @@ -62,7 +63,7 @@ static const struct xt_option_entry bpf_
  33
  34  static int bpf_obj_get(const char *filepath)
  35  {
  36 -#if defined HAVE_LINUX_BPF_H && defined __NR_bpf
  37 +#if defined HAVE_LINUX_BPF_H && defined __NR_bpf && defined BPF_FS_MAGIC
  38         union bpf_attr attr;
  39
  40         memset(&attr, 0, sizeof(attr));