diff options
Diffstat (limited to 'net/bpf/test_run.c')
| -rw-r--r-- | net/bpf/test_run.c | 16 |
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: |