[6.6.y,5/6] mptcp: drop lookup_by_id in lookup_addr

Commit Message

Matthieu Baerts (NGI0) Nov. 18, 2024, 6:27 p.m. UTC

From: Geliang Tang <[e-mail]>

commit af250c27ea1c404e210fc3a308b20f772df584d6 upstream.

When the lookup_by_id parameter of __lookup_addr() is true, it's the same
as __lookup_addr_by_id(), it can be replaced by __lookup_addr_by_id()
directly. So drop this parameter, let __lookup_addr() only looks up address
on the local address list by comparing addresses in it, not address ids.

Signed-off-by: Geliang Tang <[e-mail]>
Reviewed-by: Matthieu Baerts (NGI0) <[e-mail]>
Signed-off-by: Matthieu Baerts (NGI0) <[e-mail]>
Link: https://lore.kernel.org/r/20240305[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>
Stable-dep-of: db3eab8110bc ("mptcp: pm: use _rcu variant under rcu_read_lock")
[ Conflicts in pm_netlink.c, because commit 6a42477fe449 ("mptcp: update
  set_flags interfaces") is not in this version, and causes too many
  conflicts when backporting it. The conflict is easy to resolve: addr
  is a pointer here here in mptcp_pm_nl_set_flags(), the rest of the
  code is the same. ]
Signed-off-by: Matthieu Baerts (NGI0) <[e-mail]>
---
 net/mptcp/pm_netlink.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

Patch

diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c
index d8c47ca86de4..76be4f4412df 100644
--- a/net/mptcp/pm_netlink.c
+++ b/net/mptcp/pm_netlink.c
@@ -521,15 +521,12 @@  __lookup_addr_by_id(struct pm_nl_pernet *pernet, unsigned int id)
 }
 
 static struct mptcp_pm_addr_entry *
-__lookup_addr(struct pm_nl_pernet *pernet, const struct mptcp_addr_info *info,
-	      bool lookup_by_id)
+__lookup_addr(struct pm_nl_pernet *pernet, const struct mptcp_addr_info *info)
 {
 	struct mptcp_pm_addr_entry *entry;
 
 	list_for_each_entry(entry, &pernet->local_addr_list, list) {
-		if ((!lookup_by_id &&
-		     mptcp_addresses_equal(&entry->addr, info, entry->addr.port)) ||
-		    (lookup_by_id && entry->addr.id == info->id))
+		if (mptcp_addresses_equal(&entry->addr, info, entry->addr.port))
 			return entry;
 	}
 	return NULL;
@@ -560,7 +557,7 @@  static void mptcp_pm_create_subflow_or_signal_addr(struct mptcp_sock *msk)
 
 		mptcp_local_address((struct sock_common *)msk->first, &mpc_addr);
 		rcu_read_lock();
-		entry = __lookup_addr(pernet, &mpc_addr, false);
+		entry = __lookup_addr(pernet, &mpc_addr);
 		if (entry) {
 			__clear_bit(entry->addr.id, msk->pm.id_avail_bitmap);
 			msk->mpc_endpoint_id = entry->addr.id;
@@ -2064,7 +2061,8 @@  int mptcp_pm_nl_set_flags(struct net *net, struct mptcp_pm_addr_entry *addr, u8
 	}
 
 	spin_lock_bh(&pernet->lock);
-	entry = __lookup_addr(pernet, &addr->addr, lookup_by_id);
+	entry = lookup_by_id ? __lookup_addr_by_id(pernet, addr->addr.id) :
+			       __lookup_addr(pernet, &addr->addr);
 	if (!entry) {
 		spin_unlock_bh(&pernet->lock);
 		return -EINVAL;