leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

net, xdp: Introduce xdp_init_buff utility routine

Browse Source 
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
net/core/dev.c
View File

@@ -4606,11 +4606,11 @@ static u32 netif_receive_generic_xdp(struct sk_buff *skb,
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;
u32 mac_len;
/* Reinjected packets coming from act_mirred or similar should
* not get XDP generic processing.
@@ -4649,8 +4649,8 @@ static u32 netif_receive_generic_xdp(struct sk_buff *skb,
xdp->data_hard_start = skb->data - skb_headroom(skb);
/* 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));
orig_data_end = xdp->data_end;
orig_data = xdp->data;
@@ -4659,7 +4659,7 @@ static u32 netif_receive_generic_xdp(struct sk_buff *skb,
orig_eth_type = eth->h_proto;
rxqueue = netif_get_rxqueue(skb);
xdp->rxq = &rxqueue->xdp_rxq;
xdp_init_buff(xdp, frame_sz, &rxqueue->xdp_rxq);
act = bpf_prog_run_xdp(xdp_prog, xdp);