net: original ingress device index in PKTINFO

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Applications such as OSPF and BFD need the original ingress device not
the VRF device; the latter can be derived from the former. To that end
add the skb_iif to inet_skb_parm and set it in ipv4 code after clearing
the skb control buffer similar to IPv6. From there the pktinfo can just
pull it from cb with the PKTINFO_SKB_CB cast.

The previous patch moving the skb->dev change to L3 means nothing else
is needed for IPv6; it just works.

Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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This commit is contained in:

David Ahern 2016-05-10 11:19:51 -07:00 • committed by David S. Miller

parent 74b20582ac

commit 0b922b7a82

3 changed files with 8 additions and 1 deletions

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1

include/net/ip.h

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1

net/ipv4/ip_input.c

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7

net/ipv4/ip_sockglue.c

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