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net: core: support XDP generic on stacked devices.

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When a device is stacked like (team, bonding, failsafe or netvsc) the
XDP generic program for the parent device was not called.

Move the call to XDP generic inside __netif_receive_skb_core where
it can be done multiple times for stacked case.

Fixes: d445516966 ("net: xdp: support xdp generic on virtual devices")
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stephen Hemminger 2019-05-28 11:47:31 -07:00 committed by David S. Miller
parent 996ed04741
commit 458bf2f224
1 changed files with 12 additions and 46 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

58
net/core/dev.c
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@ -4502,23 +4502,6 @@ static int netif_rx_internal(struct sk_buff *skb)
trace_netif_rx(skb);
if (static_branch_unlikely(&generic_xdp_needed_key)) {
int ret;
preempt_disable();
rcu_read_lock();
ret = do_xdp_generic(rcu_dereference(skb->dev->xdp_prog), skb);
rcu_read_unlock();
preempt_enable();
/* Consider XDP consuming the packet a success from
* the netdev point of view we do not want to count
* this as an error.
*/
if (ret != XDP_PASS)
return NET_RX_SUCCESS;
}
#ifdef CONFIG_RPS
if (static_branch_unlikely(&rps_needed)) {
struct rps_dev_flow voidflow, *rflow = &voidflow;
@ -4858,6 +4841,18 @@ static int __netif_receive_skb_core(struct sk_buff *skb, bool pfmemalloc,
__this_cpu_inc(softnet_data.processed);
if (static_branch_unlikely(&generic_xdp_needed_key)) {
int ret2;
preempt_disable();
ret2 = do_xdp_generic(rcu_dereference(skb->dev->xdp_prog), skb);
preempt_enable();
if (ret2 != XDP_PASS)
return NET_RX_DROP;
skb_reset_mac_len(skb);
}
if (skb->protocol == cpu_to_be16(ETH_P_8021Q) ||
skb->protocol == cpu_to_be16(ETH_P_8021AD)) {
skb = skb_vlan_untag(skb);
@ -5178,19 +5173,6 @@ static int netif_receive_skb_internal(struct sk_buff *skb)
if (skb_defer_rx_timestamp(skb))
return NET_RX_SUCCESS;
if (static_branch_unlikely(&generic_xdp_needed_key)) {
int ret;
preempt_disable();
rcu_read_lock();
ret = do_xdp_generic(rcu_dereference(skb->dev->xdp_prog), skb);
rcu_read_unlock();
preempt_enable();
if (ret != XDP_PASS)
return NET_RX_DROP;
}
rcu_read_lock();
#ifdef CONFIG_RPS
if (static_branch_unlikely(&rps_needed)) {
@ -5211,7 +5193,6 @@ static int netif_receive_skb_internal(struct sk_buff *skb)
static void netif_receive_skb_list_internal(struct list_head *head)
{
struct bpf_prog *xdp_prog = NULL;
struct sk_buff *skb, *next;
struct list_head sublist;
@ -5224,21 +5205,6 @@ static void netif_receive_skb_list_internal(struct list_head *head)
}
list_splice_init(&sublist, head);
if (static_branch_unlikely(&generic_xdp_needed_key)) {
preempt_disable();
rcu_read_lock();
list_for_each_entry_safe(skb, next, head, list) {
xdp_prog = rcu_dereference(skb->dev->xdp_prog);
skb_list_del_init(skb);
if (do_xdp_generic(xdp_prog, skb) == XDP_PASS)
list_add_tail(&skb->list, &sublist);
}
rcu_read_unlock();
preempt_enable();
/* Put passed packets back on main list */
list_splice_init(&sublist, head);
}
rcu_read_lock();
#ifdef CONFIG_RPS
if (static_branch_unlikely(&rps_needed)) {