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net, xdp: Introduce xdp_init_buff utility routine

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Introduce xdp_init_buff utility routine to initialize xdp_buff fields
const over NAPI iterations (e.g. frame_sz or rxq pointer). Rely on
xdp_init_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/7f8329b6da1434dc2b05a77f2e800b29628a8913.1608670965.git.lorenzo@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Lorenzo Bianconi
2020-12-22 22:09:28 +01:00
committed by Alexei Starovoitov
parent ec24e11e08
commit 43b5169d83
28 changed files with 68 additions and 72 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/net/veth.c
View File

@ -654,7 +654,7 @@ static struct sk_buff *veth_xdp_rcv_skb(struct veth_rq *rq,
struct veth_xdp_tx_bq *bq,
struct veth_stats *stats)
{
u32 pktlen, headroom, act, metalen;
u32 pktlen, headroom, act, metalen, frame_sz;
void *orig_data, *orig_data_end;
struct bpf_prog *xdp_prog;
int mac_len, delta, off;
@ -714,11 +714,11 @@ static struct sk_buff *veth_xdp_rcv_skb(struct veth_rq *rq,
xdp.data = skb_mac_header(skb);
xdp.data_end = xdp.data + pktlen;
xdp.data_meta = xdp.data;
xdp.rxq = &rq->xdp_rxq;
/* SKB "head" area always have tailroom for skb_shared_info */
xdp.frame_sz = (void *)skb_end_pointer(skb) - xdp.data_hard_start;
xdp.frame_sz += SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
frame_sz = (void *)skb_end_pointer(skb) - xdp.data_hard_start;
frame_sz += SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
xdp_init_buff(&xdp, frame_sz, &rq->xdp_rxq);
orig_data = xdp.data;
orig_data_end = xdp.data_end;