diff mbox series

[net-next,09/13] mptcp: move to next addr when subflow creation fail

Message ID 20210326182642.136419-9-mathew.j.martineau@linux.intel.com (mailing list archive)
State Accepted
Commit 557963c383e8209b14de91bf2a0301a41b94d8c4
Delegated to: Netdev Maintainers
Headers show
Series MPTCP: Cleanup and address advertisement fixes | expand

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netdev/tree_selection success Clearly marked for net-next
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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
netdev/verify_fixes success Link
netdev/checkpatch warning WARNING: line length of 86 exceeds 80 columns
netdev/build_allmodconfig_warn success Errors and warnings before: 2 this patch: 2
netdev/header_inline success Link

Commit Message

Mat Martineau March 26, 2021, 6:26 p.m. UTC 
From: Geliang Tang <geliangtang@gmail.com>

When an invalid address was announced, the subflow couldn't be created
for this address. Therefore mptcp_pm_nl_subflow_established couldn't be
invoked. Then the next addresses in the local address list didn't have a
chance to be announced.

This patch invokes the new function mptcp_pm_add_addr_echoed when the
address is echoed. In it, use mptcp_lookup_anno_list_by_saddr to check
whether this address is in the anno_list. If it is, PM schedules the
status MPTCP_PM_SUBFLOW_ESTABLISHED to invoke
mptcp_pm_create_subflow_or_signal_addr to deal with the next address in
the local address list.

Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
---
 net/mptcp/options.c  |  1 +
 net/mptcp/pm.c       | 15 +++++++++++++++
 net/mptcp/protocol.h |  2 ++
 3 files changed, 18 insertions(+)
diff mbox series

Patch

diff --git a/net/mptcp/options.c b/net/mptcp/options.c
index 2d2340b22f61..69cafaacc31b 100644
--- a/net/mptcp/options.c
+++ b/net/mptcp/options.c
@@ -1040,6 +1040,7 @@  void mptcp_incoming_options(struct sock *sk, struct sk_buff *skb)
 			mptcp_pm_add_addr_received(msk, &addr);
 			MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_ADDADDR);
 		} else {
+			mptcp_pm_add_addr_echoed(msk, &addr);
 			mptcp_pm_del_add_timer(msk, &addr);
 			MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_ECHOADD);
 		}
diff --git a/net/mptcp/pm.c b/net/mptcp/pm.c
index 0a06d5947a73..966942d1013f 100644
--- a/net/mptcp/pm.c
+++ b/net/mptcp/pm.c
@@ -196,6 +196,21 @@  void mptcp_pm_add_addr_received(struct mptcp_sock *msk,
 	spin_unlock_bh(&pm->lock);
 }
 
+void mptcp_pm_add_addr_echoed(struct mptcp_sock *msk,
+			      struct mptcp_addr_info *addr)
+{
+	struct mptcp_pm_data *pm = &msk->pm;
+
+	pr_debug("msk=%p", msk);
+
+	spin_lock_bh(&pm->lock);
+
+	if (mptcp_lookup_anno_list_by_saddr(msk, addr) && READ_ONCE(pm->work_pending))
+		mptcp_pm_schedule_work(msk, MPTCP_PM_SUBFLOW_ESTABLISHED);
+
+	spin_unlock_bh(&pm->lock);
+}
+
 void mptcp_pm_add_addr_send_ack(struct mptcp_sock *msk)
 {
 	if (!mptcp_pm_should_add_signal(msk))
diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h
index 9c51444b26cf..b417b3591e07 100644
--- a/net/mptcp/protocol.h
+++ b/net/mptcp/protocol.h
@@ -647,6 +647,8 @@  void mptcp_pm_subflow_established(struct mptcp_sock *msk);
 void mptcp_pm_subflow_closed(struct mptcp_sock *msk, u8 id);
 void mptcp_pm_add_addr_received(struct mptcp_sock *msk,
 				const struct mptcp_addr_info *addr);
+void mptcp_pm_add_addr_echoed(struct mptcp_sock *msk,
+			      struct mptcp_addr_info *addr);
 void mptcp_pm_add_addr_send_ack(struct mptcp_sock *msk);
 void mptcp_pm_rm_addr_received(struct mptcp_sock *msk,
 			       const struct mptcp_rm_list *rm_list);