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authorHannes Frederic Sowa <hannes@stressinduktion.org>2014-09-12 14:04:43 +0200
committerDavid S. Miller <davem@davemloft.net>2014-09-13 17:07:21 -0400
commit233577a22089facf5271ab5e845b2262047c971f (patch)
treec93ec43dbf3adb316b3af67a3d315984b3cc5f10 /include/linux/skbuff.h
parentac7a04c33dd7f8e429df4b929ba3a3e8e729cc89 (diff)
net: filter: constify detection of pkt_type_offset
Currently we have 2 pkt_type_offset functions doing the same thing and spread across the architecture files. Remove those and replace them with a PKT_TYPE_OFFSET macro helper which gets the constant value from a zero sized sk_buff member right in front of the bitfield with offsetof. This new offset marker does not change size of struct sk_buff. Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Markos Chandras <markos.chandras@imgtec.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Daniel Borkmann <dborkman@redhat.com> Cc: Alexei Starovoitov <alexei.starovoitov@gmail.com> Signed-off-by: Denis Kirjanov <kda@linux-powerpc.org> Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/skbuff.h')
-rw-r--r--include/linux/skbuff.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 07c9fdd0c126..756e3d057e84 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -548,6 +548,16 @@ struct sk_buff {
ip_summed:2,
nohdr:1,
nfctinfo:3;
+
+/* if you move pkt_type around you also must adapt those constants */
+#ifdef __BIG_ENDIAN_BITFIELD
+#define PKT_TYPE_MAX (7 << 5)
+#else
+#define PKT_TYPE_MAX 7
+#endif
+#define PKT_TYPE_OFFSET() offsetof(struct sk_buff, __pkt_type_offset)
+
+ __u8 __pkt_type_offset[0];
__u8 pkt_type:3,
fclone:2,
ipvs_property:1,