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| author |   Jesper Dangaard Brouer <brouer@redhat.com> | 2020-05-14 12:49:28 +0200 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2020-05-14 21:21:54 -0700 |
| commit | a075767bbdc659066b89be282c8377fa880e9dc4 (patch) | |
| tree | 9b7b752af8904ab5f8e2c67591cca1e7f571bc70 /include/net/xdp.h | |
| parent | net: netsec: Add support for XDP frame size (diff) | |
| download | wireguard-linux-a075767bbdc659066b89be282c8377fa880e9dc4.tar.xz wireguard-linux-a075767bbdc659066b89be282c8377fa880e9dc4.zip | |
net: XDP-generic determining XDP frame size
The SKB "head" pointer points to the data area that contains
skb_shared_info, that can be found via skb_end_pointer(). Given
xdp->data_hard_start have been established (basically pointing to
skb->head), frame size is between skb_end_pointer() and data_hard_start,
plus the size reserved to skb_shared_info.
Change the bpf_xdp_adjust_tail offset adjust of skb->len, to be a positive
offset number on grow, and negative number on shrink. As this seems more
natural when reading the code.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Toke Høiland-Jørgensen <toke@redhat.com>
Link: https://lore.kernel.org/bpf/158945336804.97035.7164852191163722056.stgit@firesoul
Diffstat (limited to 'include/net/xdp.h')
0 files changed, 0 insertions, 0 deletions