netdev - [PATCH net-next 1/8] net: rtnetlink: Publish rtnl_fdb

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Message-ID: <ada2163d8edc973535987bcf87cd607761143adb.1729607879.git.petrm@nvidia.com>
Date: Tue, 22 Oct 2024 16:50:12 +0200
From: Petr Machata <petrm@...dia.com>
To: "David S. Miller" <davem@...emloft.net>, Eric Dumazet
	<edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni
	<pabeni@...hat.com>, <netdev@...r.kernel.org>
CC: Ido Schimmel <idosch@...dia.com>, Petr Machata <petrm@...dia.com>, "Amit
 Cohen" <amcohen@...dia.com>, Vladimir Oltean <vladimir.oltean@....com>,
	<mlxsw@...dia.com>, Przemek Kitszel <przemyslaw.kitszel@...el.com>,
	<intel-wired-lan@...ts.osuosl.org>, <UNGLinuxDriver@...rochip.com>, "Manish
 Chopra" <manishc@...vell.com>, <GR-Linux-NIC-Dev@...vell.com>, "Kuniyuki
 Iwashima" <kuniyu@...zon.com>, Andrew Lunn <andrew+netdev@...n.ch>
Subject: [PATCH net-next 1/8] net: rtnetlink: Publish rtnl_fdb_notify()

In the next patch, responsibility for sending notification is moved from
the core to the driver that implement fdb_add (and fdb_del in the patch
after that). In this patch, export a helper that the core currently uses
for sending FDB notifications for the drivers to use as a fallback if there
is nothing specific to report.

Signed-off-by: Petr Machata <petrm@...dia.com>
Reviewed-by: Amit Cohen <amcohen@...dia.com>
---
CC: Przemek Kitszel <przemyslaw.kitszel@...el.com>
CC: intel-wired-lan@...ts.osuosl.org
CC: UNGLinuxDriver@...rochip.com
CC: Manish Chopra <manishc@...vell.com>
CC: GR-Linux-NIC-Dev@...vell.com
CC: Kuniyuki Iwashima <kuniyu@...zon.com>
CC: Andrew Lunn <andrew+netdev@...n.ch>
---
 include/linux/rtnetlink.h | 2 ++
 net/core/rtnetlink.c      | 7 ++++---
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/include/linux/rtnetlink.h b/include/linux/rtnetlink.h
index 8468a4ce8510..2e48b4ca7187 100644
--- a/include/linux/rtnetlink.h
+++ b/include/linux/rtnetlink.h
@@ -192,6 +192,8 @@ extern int ndo_dflt_fdb_add(struct ndmsg *ndm,
 			    const unsigned char *addr,
 			    u16 vid,
 			    u16 flags);
+extern void rtnl_fdb_notify(struct net_device *dev, const u8 *addr, u16 vid,
+			    int type, u16 ndm_state);
 extern int ndo_dflt_fdb_del(struct ndmsg *ndm,
 			    struct nlattr *tb[],
 			    struct net_device *dev,
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 194a81e5f608..e5c6dd4c5cf5 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -4271,7 +4271,7 @@ void rtmsg_ifinfo_newnet(int type, struct net_device *dev, unsigned int change,
 
 static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
 				   struct net_device *dev,
-				   u8 *addr, u16 vid, u32 pid, u32 seq,
+				   const u8 *addr, u16 vid, u32 pid, u32 seq,
 				   int type, unsigned int flags,
 				   int nlflags, u16 ndm_state)
 {
@@ -4313,8 +4313,8 @@ static inline size_t rtnl_fdb_nlmsg_size(const struct net_device *dev)
 	       0;
 }
 
-static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
-			    u16 ndm_state)
+void rtnl_fdb_notify(struct net_device *dev, const u8 *addr, u16 vid, int type,
+		     u16 ndm_state)
 {
 	struct net *net = dev_net(dev);
 	struct sk_buff *skb;
@@ -4336,6 +4336,7 @@ static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
 errout:
 	rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
 }
+EXPORT_SYMBOL_GPL(rtnl_fdb_notify);
 
 /*
  * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
-- 
2.45.0