mptcp: pm: worker: split in-kernel and common tasks

To make it clear what actions are in-kernel PM specific and which ones
are not and done for all PMs, e.g. sending ADD_ADDR and close associated
subflows when a RM_ADDR is received.

Signed-off-by: Matthieu Baerts (NGI0) <[email protected]>

Author: matttbe

net/mptcp/pm.c

@@ -599,6 +599,31 @@ bool mptcp_pm_addr_families_match(const struct sock *sk,
 #endif
 }
 
+void mptcp_pm_worker(struct mptcp_sock *msk)
+{
+	struct mptcp_pm_data *pm = &msk->pm;
+
+	msk_owned_by_me(msk);
+
+	if (!(pm->status & MPTCP_PM_WORK_MASK))
+		return;
+
+	spin_lock_bh(&msk->pm.lock);
+
+	pr_debug("msk=%p status=%x\n", msk, pm->status);
+	if (pm->status & BIT(MPTCP_PM_ADD_ADDR_SEND_ACK)) {
+		pm->status &= ~BIT(MPTCP_PM_ADD_ADDR_SEND_ACK);
+		mptcp_pm_addr_send_ack(msk);
+	}
+	if (pm->status & BIT(MPTCP_PM_RM_ADDR_RECEIVED)) {
+		pm->status &= ~BIT(MPTCP_PM_RM_ADDR_RECEIVED);
+		mptcp_pm_rm_addr_recv(msk);
+	}
+	__mptcp_pm_kernel_worker(msk);
+
+	spin_unlock_bh(&msk->pm.lock);
+}
+
 void mptcp_pm_destroy(struct mptcp_sock *msk)
 {
 	mptcp_pm_free_anno_list(msk);

net/mptcp/pm_netlink.c

@@ -924,30 +924,15 @@ static void mptcp_pm_nl_rm_subflow_received(struct mptcp_sock *msk,
 	mptcp_pm_rm_addr_or_subflow(msk, rm_list, MPTCP_MIB_RMSUBFLOW);
 }
 
-void mptcp_pm_worker(struct mptcp_sock *msk)
+/* Called under PM lock */
+void __mptcp_pm_kernel_worker(struct mptcp_sock *msk)
 {
 	struct mptcp_pm_data *pm = &msk->pm;
 
-	msk_owned_by_me(msk);
-
-	if (!(pm->status & MPTCP_PM_WORK_MASK))
-		return;
-
-	spin_lock_bh(&msk->pm.lock);
-
-	pr_debug("msk=%p status=%x\n", msk, pm->status);
 	if (pm->status & BIT(MPTCP_PM_ADD_ADDR_RECEIVED)) {
 		pm->status &= ~BIT(MPTCP_PM_ADD_ADDR_RECEIVED);
 		mptcp_pm_nl_add_addr_received(msk);
 	}
-	if (pm->status & BIT(MPTCP_PM_ADD_ADDR_SEND_ACK)) {
-		pm->status &= ~BIT(MPTCP_PM_ADD_ADDR_SEND_ACK);
-		mptcp_pm_addr_send_ack(msk);
-	}
-	if (pm->status & BIT(MPTCP_PM_RM_ADDR_RECEIVED)) {
-		pm->status &= ~BIT(MPTCP_PM_RM_ADDR_RECEIVED);
-		mptcp_pm_rm_addr_recv(msk);
-	}
 	if (pm->status & BIT(MPTCP_PM_ESTABLISHED)) {
 		pm->status &= ~BIT(MPTCP_PM_ESTABLISHED);
 		mptcp_pm_nl_fully_established(msk);
@@ -956,8 +941,6 @@ void mptcp_pm_worker(struct mptcp_sock *msk)
 		pm->status &= ~BIT(MPTCP_PM_SUBFLOW_ESTABLISHED);
 		mptcp_pm_nl_subflow_established(msk);
 	}
-
-	spin_unlock_bh(&msk->pm.lock);
 }
 
 static bool address_use_port(struct mptcp_pm_addr_entry *entry)

net/mptcp/protocol.h

@@ -1154,6 +1154,7 @@ static inline u8 subflow_get_local_id(const struct mptcp_subflow_context *subflo
 
 void __init mptcp_pm_nl_init(void);
 void mptcp_pm_worker(struct mptcp_sock *msk);
+void __mptcp_pm_kernel_worker(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);