diff mbox series

[net-next,8/9] mptcp: pm: simplify select_local_address()

Message ID 20201210222506.222251-9-mathew.j.martineau@linux.intel.com (mailing list archive)
State Accepted
Commit 1bc7327b5fea60328bf72cd702eca1defa2a5655
Delegated to: Netdev Maintainers
Headers show
Series mptcp: Another set of miscellaneous MPTCP fixes | expand

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netdev/source_inline success Was 0 now: 0
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netdev/module_param success Was 0 now: 0
netdev/build_32bit success Errors and warnings before: 2 this patch: 2
netdev/kdoc success Errors and warnings before: 0 this patch: 0
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netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 22 lines checked
netdev/build_allmodconfig_warn success Errors and warnings before: 2 this patch: 2
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netdev/stable success Stable not CCed

Commit Message

Mat Martineau Dec. 10, 2020, 10:25 p.m. UTC 
From: Paolo Abeni <pabeni@redhat.com>

There is no need to unconditionally acquire the join list
lock, we can simply splice the join list into the subflow
list and traverse only the latter.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
---
 net/mptcp/pm_netlink.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c
index 9cc4eefaf080..a6d983d80576 100644
--- a/net/mptcp/pm_netlink.c
+++ b/net/mptcp/pm_netlink.c
@@ -135,7 +135,7 @@  select_local_address(const struct pm_nl_pernet *pernet,
 	struct mptcp_pm_addr_entry *entry, *ret = NULL;
 
 	rcu_read_lock();
-	spin_lock_bh(&msk->join_list_lock);
+	__mptcp_flush_join_list(msk);
 	list_for_each_entry_rcu(entry, &pernet->local_addr_list, list) {
 		if (!(entry->addr.flags & MPTCP_PM_ADDR_FLAG_SUBFLOW))
 			continue;
@@ -144,13 +144,11 @@  select_local_address(const struct pm_nl_pernet *pernet,
 		 * pending join
 		 */
 		if (entry->addr.family == ((struct sock *)msk)->sk_family &&
-		    !lookup_subflow_by_saddr(&msk->conn_list, &entry->addr) &&
-		    !lookup_subflow_by_saddr(&msk->join_list, &entry->addr)) {
+		    !lookup_subflow_by_saddr(&msk->conn_list, &entry->addr)) {
 			ret = entry;
 			break;
 		}
 	}
-	spin_unlock_bh(&msk->join_list_lock);
 	rcu_read_unlock();
 	return ret;
 }