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xdp: Add xdp_do_redirect_frame() for pre-computed xdp_frames

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Add an xdp_do_redirect_frame() variant which supports pre-computed
xdp_frame structures. This will be used in bpf_prog_run() to avoid having
to write to the xdp_frame structure when the XDP program doesn't modify the
frame boundaries.

Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20220103150812.87914-6-toke@redhat.com
This commit is contained in:
Toke Høiland-Jørgensen
2022-01-03 16:08:10 +01:00
committed by Alexei Starovoitov
parent d53ad5d8b2
commit 1372d34ccf
2 changed files with 58 additions and 11 deletions
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include/linux/filter.h
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@@ -1019,6 +1019,10 @@ int xdp_do_generic_redirect(struct net_device *dev, struct sk_buff *skb,
int xdp_do_redirect(struct net_device *dev,
struct xdp_buff *xdp,
struct bpf_prog *prog);
int xdp_do_redirect_frame(struct net_device *dev,
struct xdp_buff *xdp,
struct xdp_frame *xdpf,
struct bpf_prog *prog);
void xdp_do_flush(void);
/* The xdp_do_flush_map() helper has been renamed to drop the _map suffix, as