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Diffstat (limited to 'net/bpf/test_run.c')
-rw-r--r--net/bpf/test_run.c16
1 files changed, 12 insertions, 4 deletions
diff --git a/net/bpf/test_run.c b/net/bpf/test_run.c
index 29dbdd4c29f6..30ba7d38941d 100644
--- a/net/bpf/test_run.c
+++ b/net/bpf/test_run.c
@@ -470,25 +470,34 @@ out:
int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
union bpf_attr __user *uattr)
{
+ u32 tailroom = SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
+ u32 headroom = XDP_PACKET_HEADROOM;
u32 size = kattr->test.data_size_in;
u32 repeat = kattr->test.repeat;
struct netdev_rx_queue *rxqueue;
struct xdp_buff xdp = {};
u32 retval, duration;
+ u32 max_data_sz;
void *data;
int ret;
if (kattr->test.ctx_in || kattr->test.ctx_out)
return -EINVAL;
- data = bpf_test_init(kattr, size, XDP_PACKET_HEADROOM + NET_IP_ALIGN, 0);
+ /* XDP have extra tailroom as (most) drivers use full page */
+ max_data_sz = 4096 - headroom - tailroom;
+ if (size > max_data_sz)
+ return -EINVAL;
+
+ data = bpf_test_init(kattr, max_data_sz, headroom, tailroom);
if (IS_ERR(data))
return PTR_ERR(data);
xdp.data_hard_start = data;
- xdp.data = data + XDP_PACKET_HEADROOM + NET_IP_ALIGN;
+ xdp.data = data + headroom;
xdp.data_meta = xdp.data;
xdp.data_end = xdp.data + size;
+ xdp.frame_sz = headroom + max_data_sz + tailroom;
rxqueue = __netif_get_rx_queue(current->nsproxy->net_ns->loopback_dev, 0);
xdp.rxq = &rxqueue->xdp_rxq;
@@ -496,8 +505,7 @@ int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
ret = bpf_test_run(prog, &xdp, repeat, &retval, &duration, true);
if (ret)
goto out;
- if (xdp.data != data + XDP_PACKET_HEADROOM + NET_IP_ALIGN ||
- xdp.data_end != xdp.data + size)
+ if (xdp.data != data + headroom || xdp.data_end != xdp.data + size)
size = xdp.data_end - xdp.data;
ret = bpf_test_finish(kattr, uattr, xdp.data, size, retval, duration);
out: