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authorDavid Miller <davem@davemloft.net>2017-05-02 11:36:45 -0400
committerDavid S. Miller <davem@davemloft.net>2017-05-02 11:46:28 -0400
commit586f8525979ad9574bf61637fd58c98d5077f29d (patch)
tree6f6d73b367e877b7c4cc14d991ea659df5959480
parent78e5227237cae9172dd50c3ebb08d4fb31530676 (diff)
downloadlinux-586f8525979ad9574bf61637fd58c98d5077f29d.tar.bz2
bpf: Align packet data properly in program testing framework.
Make sure we apply NET_IP_ALIGN when reserving headroom for SKB and XDP test runs, just like a real driver would. Signed-off-by: David S. Miller <davem@davemloft.net> Acked-by: Daniel Borkmann <daniel@iogearbox.net>
-rw-r--r--net/bpf/test_run.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/net/bpf/test_run.c b/net/bpf/test_run.c
index f946912c8a81..6be41a44d688 100644
--- a/net/bpf/test_run.c
+++ b/net/bpf/test_run.c
@@ -100,7 +100,7 @@ int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
void *data;
int ret;
- data = bpf_test_init(kattr, size, NET_SKB_PAD,
+ data = bpf_test_init(kattr, size, NET_SKB_PAD + NET_IP_ALIGN,
SKB_DATA_ALIGN(sizeof(struct skb_shared_info)));
if (IS_ERR(data))
return PTR_ERR(data);
@@ -125,7 +125,7 @@ int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
return -ENOMEM;
}
- skb_reserve(skb, NET_SKB_PAD);
+ skb_reserve(skb, NET_SKB_PAD + NET_IP_ALIGN);
__skb_put(skb, size);
skb->protocol = eth_type_trans(skb, current->nsproxy->net_ns->loopback_dev);
skb_reset_network_header(skb);
@@ -156,16 +156,16 @@ int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
void *data;
int ret;
- data = bpf_test_init(kattr, size, XDP_PACKET_HEADROOM, 0);
+ data = bpf_test_init(kattr, size, XDP_PACKET_HEADROOM + NET_IP_ALIGN, 0);
if (IS_ERR(data))
return PTR_ERR(data);
xdp.data_hard_start = data;
- xdp.data = data + XDP_PACKET_HEADROOM;
+ xdp.data = data + XDP_PACKET_HEADROOM + NET_IP_ALIGN;
xdp.data_end = xdp.data + size;
retval = bpf_test_run(prog, &xdp, repeat, &duration);
- if (xdp.data != data + XDP_PACKET_HEADROOM)
+ if (xdp.data != data + XDP_PACKET_HEADROOM + NET_IP_ALIGN)
size = xdp.data_end - xdp.data;
ret = bpf_test_finish(kattr, uattr, xdp.data, size, retval, duration);
kfree(data);