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xdp: remove bpf_warn_invalid_xdp_redirect

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Given there is a tracepoint that can track the error code
of xdp_do_redirect calls, the WARN_ONCE in bpf_warn_invalid_xdp_redirect
doesn't seem relevant any longer.  Simply remove the function.

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jesper Dangaard Brouer
2017-08-24 12:33:03 +02:00
committed by David S. Miller
parent fb3bbbda5f
commit d08adb82fd
1 changed files with 0 additions and 8 deletions
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8
net/core/filter.c
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@@ -2476,7 +2476,6 @@ static int __bpf_tx_xdp(struct net_device *dev,
int err; int err;
if (!dev->netdev_ops->ndo_xdp_xmit) { if (!dev->netdev_ops->ndo_xdp_xmit) {
bpf_warn_invalid_xdp_redirect(dev->ifindex);
return -EOPNOTSUPP; return -EOPNOTSUPP;
} }
@@ -2543,7 +2542,6 @@ int xdp_do_redirect(struct net_device *dev, struct xdp_buff *xdp,
fwd = dev_get_by_index_rcu(dev_net(dev), index); fwd = dev_get_by_index_rcu(dev_net(dev), index);
ri->ifindex = 0; ri->ifindex = 0;
if (unlikely(!fwd)) { if (unlikely(!fwd)) {
bpf_warn_invalid_xdp_redirect(index);
err = -EINVAL; err = -EINVAL;
goto out; goto out;
} }
@@ -2564,7 +2562,6 @@ int xdp_do_generic_redirect(struct net_device *dev, struct sk_buff *skb)
dev = dev_get_by_index_rcu(dev_net(dev), index); dev = dev_get_by_index_rcu(dev_net(dev), index);
ri->ifindex = 0; ri->ifindex = 0;
if (unlikely(!dev)) { if (unlikely(!dev)) {
bpf_warn_invalid_xdp_redirect(index);
return -EINVAL; return -EINVAL;
} }
@@ -3565,11 +3562,6 @@ void bpf_warn_invalid_xdp_action(u32 act)
} }
EXPORT_SYMBOL_GPL(bpf_warn_invalid_xdp_action); EXPORT_SYMBOL_GPL(bpf_warn_invalid_xdp_action);
void bpf_warn_invalid_xdp_redirect(u32 ifindex)
{
WARN_ONCE(1, "Illegal XDP redirect to unsupported device ifindex(%i)\n", ifindex);
}
static bool __is_valid_sock_ops_access(int off, int size) static bool __is_valid_sock_ops_access(int off, int size)
{ {
if (off < 0 || off >= sizeof(struct bpf_sock_ops)) if (off < 0 || off >= sizeof(struct bpf_sock_ops))