diff options
| author | Lorenzo Bianconi <lorenzo@kernel.org> | 2020-12-22 22:09:29 +0100 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2021-01-08 13:39:24 -0800 |
| commit | be9df4aff65f18caa79b35f88f42c3d5a43af14f (patch) | |
| tree | 557249b78a79a93ec751c8bb8d56152641a1f874 /net/core/dev.c | |
| parent | 43b5169d8355ccf26d726fbc75f083b2429113e4 (diff) | |
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 'net/core/dev.c')
| -rw-r--r-- | net/core/dev.c | 20 |
1 files changed, 9 insertions, 11 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index e6d758a3c2a9..55499b017a42 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -4603,14 +4603,14 @@ static u32 netif_receive_generic_xdp(struct sk_buff *skb, struct xdp_buff *xdp, struct bpf_prog *xdp_prog) { + void *orig_data, *orig_data_end, *hard_start; struct netdev_rx_queue *rxqueue; - void *orig_data, *orig_data_end; u32 metalen, act = XDP_DROP; u32 mac_len, frame_sz; __be16 orig_eth_type; struct ethhdr *eth; bool orig_bcast; - int hlen, off; + int off; /* Reinjected packets coming from act_mirred or similar should * not get XDP generic processing. @@ -4642,25 +4642,23 @@ static u32 netif_receive_generic_xdp(struct sk_buff *skb, * header. */ mac_len = skb->data - skb_mac_header(skb); - hlen = skb_headlen(skb) + mac_len; - xdp->data = skb->data - mac_len; - xdp->data_meta = xdp->data; - xdp->data_end = xdp->data + hlen; - xdp->data_hard_start = skb->data - skb_headroom(skb); + hard_start = skb->data - skb_headroom(skb); /* SKB "head" area always have tailroom for skb_shared_info */ - frame_sz = (void *)skb_end_pointer(skb) - xdp->data_hard_start; + frame_sz = (void *)skb_end_pointer(skb) - hard_start; frame_sz += SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); + rxqueue = netif_get_rxqueue(skb); + xdp_init_buff(xdp, frame_sz, &rxqueue->xdp_rxq); + xdp_prepare_buff(xdp, hard_start, skb_headroom(skb) - mac_len, + skb_headlen(skb) + mac_len, true); + orig_data_end = xdp->data_end; orig_data = xdp->data; eth = (struct ethhdr *)xdp->data; orig_bcast = is_multicast_ether_addr_64bits(eth->h_dest); orig_eth_type = eth->h_proto; - rxqueue = netif_get_rxqueue(skb); - xdp_init_buff(xdp, frame_sz, &rxqueue->xdp_rxq); - act = bpf_prog_run_xdp(xdp_prog, xdp); /* check if bpf_xdp_adjust_head was used */ |