netdev - [PATCH bpf-next 04/12] net: core: rename netif_receive_generic_xdp() to do_generic_xdp

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Message-Id: <20200123014210.38412-5-dsahern@kernel.org>
Date:   Wed, 22 Jan 2020 18:42:02 -0700
From:   David Ahern <dsahern@...nel.org>
To:     netdev@...r.kernel.org
Cc:     prashantbhole.linux@...il.com, jasowang@...hat.com,
        davem@...emloft.net, jakub.kicinski@...ronome.com,
        jbrouer@...hat.com, toke@...hat.com, mst@...hat.com,
        toshiaki.makita1@...il.com, daniel@...earbox.net,
        john.fastabend@...il.com, ast@...nel.org, kafai@...com,
        songliubraving@...com, yhs@...com, andriin@...com,
        dsahern@...il.com
Subject: [PATCH bpf-next 04/12] net: core: rename netif_receive_generic_xdp() to do_generic_xdp_core()

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

In skb generic path, we need a way to run XDP program on skb but
to have customized handling of XDP actions. netif_receive_generic_xdp
will be more helpful in such cases than do_xdp_generic.

This patch prepares netif_receive_generic_xdp() to be used as general
purpose function by renaming it and exporting 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            | 8 ++++----
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index e9cc326086f4..9c219796691c 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -3665,6 +3665,8 @@ 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 bf76dbee9d2a..3ba207b4ed79 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 netif_receive_generic_xdp(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 netif_receive_generic_xdp(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.
@@ -4610,7 +4610,7 @@ int do_xdp_generic(struct bpf_prog *xdp_prog, struct sk_buff *skb)
 		u32 act;
 		int err;
 
-		act = netif_receive_generic_xdp(skb, &xdp, xdp_prog);
+		act = do_xdp_generic_core(skb, &xdp, xdp_prog);
 		if (act != XDP_PASS) {
 			switch (act) {
 			case XDP_REDIRECT:
-- 
2.21.1 (Apple Git-122.3)