This is a note to let you know that I've just added the patch titled
net: use indirect call helpers for dst_input
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-use-indirect-call-helpers-for-dst_input.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 66b3bd382c7fec8697171b736591181e7c19c9c0
Author: Brian Vazquez <brianvv@xxxxxxxxxx>
Date: Mon Feb 1 17:41:29 2021 +0000
net: use indirect call helpers for dst_input
[ Upstream commit e43b21906439ed14dda84f9784d38c03d0464607 ]
This patch avoids the indirect call for the common case:
ip_local_deliver and ip6_input
Signed-off-by: Brian Vazquez <brianvv@xxxxxxxxxx>
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Stable-dep-of: 13e55fbaec17 ("net: ipv6: fix dst ref loop on input in rpl lwt")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/include/net/dst.h b/include/net/dst.h
index 48e613420b952..907b4b5893a67 100644
--- a/include/net/dst.h
+++ b/include/net/dst.h
@@ -18,6 +18,7 @@
#include <linux/refcount.h>
#include <net/neighbour.h>
#include <asm/processor.h>
+#include <linux/indirect_call_wrapper.h>
struct sk_buff;
@@ -436,10 +437,13 @@ static inline int dst_output(struct net *net, struct sock *sk, struct sk_buff *s
return skb_dst(skb)->output(net, sk, skb);
}
+INDIRECT_CALLABLE_DECLARE(int ip6_input(struct sk_buff *));
+INDIRECT_CALLABLE_DECLARE(int ip_local_deliver(struct sk_buff *));
/* Input packet from network to transport. */
static inline int dst_input(struct sk_buff *skb)
{
- return skb_dst(skb)->input(skb);
+ return INDIRECT_CALL_INET(skb_dst(skb)->input,
+ ip6_input, ip_local_deliver, skb);
}
static inline struct dst_entry *dst_check(struct dst_entry *dst, u32 cookie)
diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c
index 372579686162b..3109bf6cdf283 100644
--- a/net/ipv4/ip_input.c
+++ b/net/ipv4/ip_input.c
@@ -253,6 +253,7 @@ int ip_local_deliver(struct sk_buff *skb)
net, NULL, skb, skb->dev, NULL,
ip_local_deliver_finish);
}
+EXPORT_SYMBOL(ip_local_deliver);
static inline bool ip_rcv_options(struct sk_buff *skb, struct net_device *dev)
{
