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| author | Lorenzo Bianconi <lorenzo@kernel.org> | 2020-12-22 22:09:29 +0100 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2021-01-08 22:39:24 +0100 |
| commit | be9df4aff65f18caa79b35f88f42c3d5a43af14f (patch) | |
| tree | 557249b78a79a93ec751c8bb8d56152641a1f874 /include/net/xdp.h | |
| parent | net, xdp: Introduce xdp_init_buff utility routine (diff) | |
| download | linux-be9df4aff65f18caa79b35f88f42c3d5a43af14f.tar.xz linux-be9df4aff65f18caa79b35f88f42c3d5a43af14f.zip | |
net, xdp: Introduce xdp_prepare_buff utility routine
Introduce xdp_prepare_buff utility routine to initialize per-descriptor
xdp_buff fields (e.g. xdp_buff pointers). Rely on xdp_prepare_buff() in
all XDP capable drivers.
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Alexander Duyck <alexanderduyck@fb.com>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Shay Agroskin <shayagr@amazon.com>
Acked-by: Martin Habets <habetsm.xilinx@gmail.com>
Acked-by: Camelia Groza <camelia.groza@nxp.com>
Acked-by: Marcin Wojtas <mw@semihalf.com>
Link: https://lore.kernel.org/bpf/45f46f12295972a97da8ca01990b3e71501e9d89.1608670965.git.lorenzo@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'include/net/xdp.h')
| -rw-r--r-- | include/net/xdp.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/net/xdp.h b/include/net/xdp.h index 8a589f7e08e0..0cf3976ce77c 100644 --- a/include/net/xdp.h +++ b/include/net/xdp.h @@ -83,6 +83,18 @@ xdp_init_buff(struct xdp_buff *xdp, u32 frame_sz, struct xdp_rxq_info *rxq) xdp->rxq = rxq; } +static __always_inline void +xdp_prepare_buff(struct xdp_buff *xdp, unsigned char *hard_start, + int headroom, int data_len, const bool meta_valid) +{ + unsigned char *data = hard_start + headroom; + + xdp->data_hard_start = hard_start; + xdp->data = data; + xdp->data_end = data + data_len; + xdp->data_meta = meta_valid ? data : data + 1; +} + /* Reserve memory area at end-of data area. * * This macro reserves tailroom in the XDP buffer by limiting the |