Alan Maguire 58dfc900fa bpf: add layer 2 encap support to bpf_skb_adjust_room ... commit 868d523535 ("bpf: add bpf_skb_adjust_room encap flags") introduced support to bpf_skb_adjust_room for GSO-friendly GRE and UDP encapsulation. For GSO to work for skbs, the inner headers (mac and network) need to be marked. For L3 encapsulation using bpf_skb_adjust_room, the mac and network headers are identical. Here we provide a way of specifying the inner mac header length for cases where L2 encap is desired. Such an approach can support encapsulated ethernet headers, MPLS headers etc. For example to convert from a packet of form [eth][ip][tcp] to [eth][ip][udp][inner mac][ip][tcp], something like the following could be done: headroom = sizeof(iph) + sizeof(struct udphdr) + inner_maclen; ret = bpf_skb_adjust_room(skb, headroom, BPF_ADJ_ROOM_MAC, BPF_F_ADJ_ROOM_ENCAP_L4_UDP | BPF_F_ADJ_ROOM_ENCAP_L3_IPV4 | BPF_F_ADJ_ROOM_ENCAP_L2(inner_maclen)); Signed-off-by: Alan Maguire <alan.maguire@oracle.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>		2019-04-11 22:50:56 +02:00
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asm-generic	Kbuild updates for v5.1 (2nd)	2019-03-17 13:25:26 -07:00
drm	Merge branch 'drm-next-5.1' of git://people.freedesktop.org/~agd5f/linux into drm-next	2019-02-22 15:56:42 +10:00
linux	bpf: add layer 2 encap support to bpf_skb_adjust_room	2019-04-11 22:50:56 +02:00
misc	habanalabs: add comments in uapi/misc/habanalabs.h	2019-02-28 13:06:09 +01:00
mtd	ubi: Expose the bitrot interface	2019-02-24 11:40:45 +01:00
rdma	RDMA/core: Add RDMA_NLDEV_CMD_NEWLINK/DELLINK support	2019-02-19 20:52:19 -07:00
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