[PATCH 5.10.y 1/2] mptcp: export local_address

["Matthieu Baerts (NGI0)" <matttbe@kernel.org>]

From: Geliang Tang <geliang.tang@suse.com>

commit dc886bce753cc2cf3c88ec5c7a6880a4e17d65ba upstream.

Rename local_address() with "mptcp_" prefix and export it in protocol.h.

This function will be re-used in the common PM code (pm.c) in the
following commit.

Signed-off-by: Geliang Tang <geliang.tang@suse.com>
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Reviewed-by: Larysa Zaremba <larysa.zaremba@intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Stable-dep-of: 6834097fc38c ("mptcp: pm: fix backup support in signal endpoints")
[ Conflicts in pm_netlink.c and protocol.h, because the context has
  changed in commit 4638de5aefe5 ("mptcp: handle local addrs announced
  by userspace PMs") which is not in this version. This commit is
  unrelated to this modification. Also some parts using 'local_address'
  are not in this version, that's OK, we don't need to do anything with
  them. ]
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
---
 net/mptcp/pm_netlink.c | 9 ++++-----
 net/mptcp/protocol.h   | 1 +
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c
index 7f4d84f5189b..6a0079d42dc4 100644
--- a/net/mptcp/pm_netlink.c
+++ b/net/mptcp/pm_netlink.c
@@ -84,8 +84,7 @@ static bool address_zero(const struct mptcp_addr_info *addr)
 	return addresses_equal(addr, &zero, false);
 }
 
-static void local_address(const struct sock_common *skc,
-			  struct mptcp_addr_info *addr)
+void mptcp_local_address(const struct sock_common *skc, struct mptcp_addr_info *addr)
 {
 	addr->port = 0;
 	addr->family = skc->skc_family;
@@ -120,7 +119,7 @@ static bool lookup_subflow_by_saddr(const struct list_head *list,
 	list_for_each_entry(subflow, list, node) {
 		skc = (struct sock_common *)mptcp_subflow_tcp_sock(subflow);
 
-		local_address(skc, &cur);
+		mptcp_local_address(skc, &cur);
 		if (addresses_equal(&cur, saddr, false))
 			return true;
 	}
@@ -533,8 +532,8 @@ int mptcp_pm_nl_get_local_id(struct mptcp_sock *msk, struct sock_common *skc)
 	/* The 0 ID mapping is defined by the first subflow, copied into the msk
 	 * addr
 	 */
-	local_address((struct sock_common *)msk, &msk_local);
-	local_address((struct sock_common *)skc, &skc_local);
+	mptcp_local_address((struct sock_common *)msk, &msk_local);
+	mptcp_local_address((struct sock_common *)skc, &skc_local);
 	if (addresses_equal(&msk_local, &skc_local, false))
 		return 0;
 
diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h
index b5978bb4022f..ddfc7bde8c90 100644
--- a/net/mptcp/protocol.h
+++ b/net/mptcp/protocol.h
@@ -372,6 +372,7 @@ void __mptcp_close_ssk(struct sock *sk, struct sock *ssk,
 		       struct mptcp_subflow_context *subflow,
 		       long timeout);
 void mptcp_subflow_reset(struct sock *ssk);
+void mptcp_local_address(const struct sock_common *skc, struct mptcp_addr_info *addr);
 
 /* called with sk socket lock held */
 int __mptcp_subflow_connect(struct sock *sk, const struct mptcp_addr_info *loc,
-- 
2.45.2