bonding: fix PACKET_ORIGDEV regression
This patch fixes a subtle PACKET_ORIGDEV regression which was a side effect of fixes introduced by: 6a9e461f bonding: pass link-local packets to bonding master also. ... to: b89f04c6 bonding: deliver link-local packets with skb->dev set to link that packets arrived on While 6a9e461f restored pre-b89f04c6 presence of link-local packets on bonding masters (which is required e.g. by linux bridges participating in spanning tree or needed for lab-like setups created with group_fwd_mask) it also caused the originating device information to be lost due to cloning. Maciej Żenczykowski proposed another solution that doesn't require packet cloning and retains original device information - instead of returning RX_HANDLER_PASS for all link-local packets it's now limited only to packets from inactive slaves. At the same time, packets passed to bonding masters retain correct information about the originating device and PACKET_ORIGDEV can be used to determine it. This elegantly solves all issues so far: - link-local packets that were removed from bonding masters - LLDP daemons being forced to explicitly bind to slave interfaces - PACKET_ORIGDEV having no effect on bond interfaces Fixes: 6a9e461f (bonding: pass link-local packets to bonding master also.) Reported-by:Vincent Bernat <vincent@bernat.ch> Signed-off-by:
Michal Soltys <soltys@ziu.info> Signed-off-by:
Maciej Żenczykowski <maze@google.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
parent
ad49bc63
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