mptcp: add addresses_identically_equal helper

Similar to addresses_equal() helper, this patch adds a new helper addresses_identically_equal() to test if the two given addresses have both the same address and the same address id. Add a new parameter check_id for mptcp_lookup_anno_list_by_saddr(), and use the newly added helper instead of mptcp_addresses_equal() in it. Signed-off-by: Geliang Tang <[email protected]>
intel-lab-lkp · Nov 4, 2023 · 891bd5e · 891bd5e
1 parent f7e5ef8
commit 891bd5e
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Showing 3 changed files with 22 additions and 8 deletions.
diff --git a/net/mptcp/pm.c b/net/mptcp/pm.c
@@ -258,7 +258,7 @@ void mptcp_pm_add_addr_echoed(struct mptcp_sock *msk,
 
 	spin_lock_bh(&pm->lock);
 
-	if (mptcp_lookup_anno_list_by_saddr(msk, addr) && READ_ONCE(pm->work_pending))
+	if (mptcp_lookup_anno_list_by_saddr(msk, addr, false) && READ_ONCE(pm->work_pending))
 		mptcp_pm_schedule_work(msk, MPTCP_PM_SUBFLOW_ESTABLISHED);
 
 	spin_unlock_bh(&pm->lock);

diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c
@@ -87,6 +87,18 @@ bool mptcp_addresses_equal(const struct mptcp_addr_info *a,
 	return a->port == b->port;
 }
 
+static bool addresses_identically_equal(const struct mptcp_addr_info *a,
+					const struct mptcp_addr_info *b,
+					bool use_port, bool check_id)
+{
+	if (!mptcp_addresses_equal(a, b, use_port))
+		return false;
+	if (!check_id)
+		return true;
+
+	return a->id == b->id;
+}
+
 void mptcp_local_address(const struct sock_common *skc, struct mptcp_addr_info *addr)
 {
 	addr->family = skc->skc_family;
@@ -267,14 +279,15 @@ bool mptcp_pm_nl_check_work_pending(struct mptcp_sock *msk)
 
 struct mptcp_pm_add_entry *
 mptcp_lookup_anno_list_by_saddr(const struct mptcp_sock *msk,
-				const struct mptcp_addr_info *addr)
+				const struct mptcp_addr_info *addr,
+				bool check_id)
 {
 	struct mptcp_pm_add_entry *entry;
 
 	lockdep_assert_held(&msk->pm.lock);
 
 	list_for_each_entry(entry, &msk->pm.anno_list, list) {
-		if (mptcp_addresses_equal(&entry->addr, addr, true))
+		if (addresses_identically_equal(&entry->addr, addr, true, check_id))
 			return entry;
 	}
 
@@ -354,12 +367,12 @@ mptcp_pm_del_add_timer(struct mptcp_sock *msk,
 	struct sock *sk = (struct sock *)msk;
 
 	spin_lock_bh(&msk->pm.lock);
-	entry = mptcp_lookup_anno_list_by_saddr(msk, addr);
-	if (entry && (!check_id || entry->addr.id == addr->id))
+	entry = mptcp_lookup_anno_list_by_saddr(msk, addr, check_id);
+	if (entry)
 		entry->retrans_times = ADD_ADDR_RETRANS_MAX;
 	spin_unlock_bh(&msk->pm.lock);
 
-	if (entry && (!check_id || entry->addr.id == addr->id))
+	if (entry)
 		sk_stop_timer_sync(sk, &entry->add_timer);
 
 	return entry;
@@ -374,7 +387,7 @@ bool mptcp_pm_alloc_anno_list(struct mptcp_sock *msk,
 
 	lockdep_assert_held(&msk->pm.lock);
 
-	add_entry = mptcp_lookup_anno_list_by_saddr(msk, addr);
+	add_entry = mptcp_lookup_anno_list_by_saddr(msk, addr, false);
 
 	if (add_entry) {
 		if (mptcp_pm_is_kernel(msk))

diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h
@@ -918,7 +918,8 @@ mptcp_pm_del_add_timer(struct mptcp_sock *msk,
 		       const struct mptcp_addr_info *addr, bool check_id);
 struct mptcp_pm_add_entry *
 mptcp_lookup_anno_list_by_saddr(const struct mptcp_sock *msk,
-				const struct mptcp_addr_info *addr);
+				const struct mptcp_addr_info *addr,
+				bool check_id);
 int mptcp_pm_get_flags_and_ifindex_by_id(struct mptcp_sock *msk,
 					 unsigned int id,
 					 u8 *flags, int *ifindex);