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xfrm: Extend the output_mark to support input direction and masking.

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We already support setting an output mark at the xfrm_state,
unfortunately this does not support the input direction and
masking the marks that will be applied to the skb. This change
adds support applying a masked value in both directions.

The existing XFRMA_OUTPUT_MARK number is reused for this purpose
and as it is now bi-directional, it is renamed to XFRMA_SET_MARK.

An additional XFRMA_SET_MARK_MASK attribute is added for setting the
mask. If the attribute mask not provided, it is set to 0xffffffff,
keeping the XFRMA_OUTPUT_MARK existing 'full mask' semantics.

Co-developed-by: Tobias Brunner <tobias@strongswan.org>
Co-developed-by: Eyal Birger <eyal.birger@gmail.com>
Co-developed-by: Lorenzo Colitti <lorenzo@google.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Tobias Brunner <tobias@strongswan.org>
Signed-off-by: Eyal Birger <eyal.birger@gmail.com>
Signed-off-by: Lorenzo Colitti <lorenzo@google.com>
This commit is contained in:
Steffen Klassert
2018-06-12 12:44:26 +02:00
parent dd55c4ea9e
commit 9b42c1f179
7 changed files with 57 additions and 17 deletions
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9
include/net/xfrm.h
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@@ -166,7 +166,7 @@ struct xfrm_state {
int header_len;
int trailer_len;
u32 extra_flags;
u32 output_mark;
struct xfrm_mark smark;
} props;
struct xfrm_lifetime_cfg lft;
@@ -2012,6 +2012,13 @@ static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
return ret;
}
static inline __u32 xfrm_smark_get(__u32 mark, struct xfrm_state *x)
{
struct xfrm_mark *m = &x->props.smark;
return (m->v & m->m) | (mark & ~m->m);
}
static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x,
unsigned int family)
{