This patch moves struct pm_nl_pernet from pm_netlink.c to protocol.h,
and export pm_nl_get_pernet_from_msk() helper.

Then every fields of struct pm_nl_pernet can be accessed everywhere,
not only being limited in pm_netlink.c.

Signed-off-by: Geliang Tang <geliang.tang@suse.com>
---
 net/mptcp/pm_netlink.c | 17 ++---------------
 net/mptcp/protocol.h   | 17 +++++++++++++++++
 2 files changed, 19 insertions(+), 15 deletions(-)

diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c
index bf4d96f6f99a..1dcf104d7a01 100644
--- a/net/mptcp/pm_netlink.c
+++ b/net/mptcp/pm_netlink.c
@@ -31,20 +31,6 @@ struct mptcp_pm_add_entry {
 	struct mptcp_sock	*sock;
 };
 
-struct pm_nl_pernet {
-	/* protects pernet updates */
-	spinlock_t		lock;
-	struct list_head	local_addr_list;
-	unsigned int		addrs;
-	unsigned int		stale_loss_cnt;
-	unsigned int		add_addr_signal_max;
-	unsigned int		add_addr_accept_max;
-	unsigned int		local_addr_max;
-	unsigned int		subflows_max;
-	unsigned int		next_id;
-	DECLARE_BITMAP(id_bitmap, MPTCP_PM_MAX_ADDR_ID + 1);
-};
-
 #define MPTCP_PM_ADDR_MAX	8
 #define ADD_ADDR_RETRANS_MAX	3
 
@@ -53,11 +39,12 @@ static struct pm_nl_pernet *pm_nl_get_pernet(const struct net *net)
 	return net_generic(net, pm_nl_pernet_id);
 }
 
-static struct pm_nl_pernet *
+struct pm_nl_pernet *
 pm_nl_get_pernet_from_msk(const struct mptcp_sock *msk)
 {
 	return pm_nl_get_pernet(sock_net((struct sock *)msk));
 }
+EXPORT_SYMBOL_GPL(pm_nl_get_pernet_from_msk);
 
 bool mptcp_addresses_equal(const struct mptcp_addr_info *a,
 			   const struct mptcp_addr_info *b, bool use_port)
diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h
index 8529b3ae55e9..c38a2126071b 100644
--- a/net/mptcp/protocol.h
+++ b/net/mptcp/protocol.h
@@ -1026,6 +1026,23 @@ void __init mptcp_pm_nl_init(void);
 void mptcp_pm_nl_work(struct mptcp_sock *msk);
 void mptcp_pm_nl_rm_subflow_received(struct mptcp_sock *msk,
 				     const struct mptcp_rm_list *rm_list);
+
+struct pm_nl_pernet {
+	/* protects pernet updates */
+	spinlock_t		lock;
+	struct list_head	local_addr_list;
+	unsigned int		addrs;
+	unsigned int		stale_loss_cnt;
+	unsigned int		add_addr_signal_max;
+	unsigned int		add_addr_accept_max;
+	unsigned int		local_addr_max;
+	unsigned int		subflows_max;
+	unsigned int		next_id;
+	DECLARE_BITMAP(id_bitmap, MPTCP_PM_MAX_ADDR_ID + 1);
+};
+
+struct pm_nl_pernet *
+pm_nl_get_pernet_from_msk(const struct mptcp_sock *msk);
 unsigned int mptcp_pm_get_add_addr_signal_max(const struct mptcp_sock *msk);
 unsigned int mptcp_pm_get_add_addr_accept_max(const struct mptcp_sock *msk);
 unsigned int mptcp_pm_get_subflows_max(const struct mptcp_sock *msk);
-- 
2.35.3