netdev - [RFC net-next 03/18] net: core: export do_xdp_generic

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Message-Id: <20191126100744.5083-4-prashantbhole.linux@gmail.com>
Date:   Tue, 26 Nov 2019 19:07:29 +0900
From:   Prashant Bhole <prashantbhole.linux@...il.com>
To:     "David S . Miller" <davem@...emloft.net>,
        "Michael S . Tsirkin" <mst@...hat.com>
Cc:     Jason Wang <jasowang@...hat.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Jakub Kicinski <jakub.kicinski@...ronome.com>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        John Fastabend <john.fastabend@...il.com>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        Andrii Nakryiko <andriin@...com>, netdev@...r.kernel.org,
        qemu-devel@...gnu.org, kvm@...r.kernel.org,
        Prashant Bhole <prashantbhole.linux@...il.com>
Subject: [RFC net-next 03/18] net: core: export do_xdp_generic_core()

From: Jason Wang <jasowang@...hat.com>

Let's export do_xdp_generic as a general purpose function. It will
just run XDP program on skb but will not handle XDP actions.

Signed-off-by: Jason Wang <jasowang@...hat.com>
Signed-off-by: Prashant Bhole <prashantbhole.linux@...il.com>
---
 include/linux/netdevice.h | 2 ++
 net/core/dev.c            | 6 +++---
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 9e6fb8524d91..2b6317ac9795 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -3648,6 +3648,8 @@ static inline void dev_consume_skb_any(struct sk_buff *skb)
 
 void generic_xdp_tx(struct sk_buff *skb, struct bpf_prog *xdp_prog);
 int do_xdp_generic(struct bpf_prog *xdp_prog, struct sk_buff *skb);
+u32 do_xdp_generic_core(struct sk_buff *skb, struct xdp_buff *xdp,
+			struct bpf_prog *xdp_prog);
 int netif_rx(struct sk_buff *skb);
 int netif_rx_ni(struct sk_buff *skb);
 int netif_receive_skb(struct sk_buff *skb);
diff --git a/net/core/dev.c b/net/core/dev.c
index 5ae647b9914f..d97c3f35e047 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -4461,9 +4461,8 @@ static struct netdev_rx_queue *netif_get_rxqueue(struct sk_buff *skb)
 	return rxqueue;
 }
 
-static u32 do_xdp_generic_core(struct sk_buff *skb,
-			       struct xdp_buff *xdp,
-			       struct bpf_prog *xdp_prog)
+u32 do_xdp_generic_core(struct sk_buff *skb, struct xdp_buff *xdp,
+			struct bpf_prog *xdp_prog)
 {
 	struct netdev_rx_queue *rxqueue;
 	void *orig_data, *orig_data_end;
@@ -4574,6 +4573,7 @@ static u32 do_xdp_generic_core(struct sk_buff *skb,
 
 	return act;
 }
+EXPORT_SYMBOL_GPL(do_xdp_generic_core);
 
 /* When doing generic XDP we have to bypass the qdisc layer and the
  * network taps in order to match in-driver-XDP behavior.
-- 
2.20.1