From: Mat Martineau <mathew.j.martineau@linux.intel.com>
To: netdev@vger.kernel.org
Cc: Geliang Tang <geliangtang@gmail.com>,
davem@davemloft.net, kuba@kernel.org, mptcp@lists.01.org,
Mat Martineau <mathew.j.martineau@linux.intel.com>
Subject: [PATCH net-next v2 03/15] mptcp: create subflow or signal addr for newly added address
Date: Mon, 1 Feb 2021 15:09:08 -0800 [thread overview]
Message-ID: <20210201230920.66027-4-mathew.j.martineau@linux.intel.com> (raw)
In-Reply-To: <20210201230920.66027-1-mathew.j.martineau@linux.intel.com>
From: Geliang Tang <geliangtang@gmail.com>
Currently, when a new MPTCP endpoint is added, the existing MPTCP
sockets are not affected.
This patch implements a new function mptcp_nl_add_subflow_or_signal_addr,
invoked when an address is added from PM netlink. This function traverses
the MPTCP sockets list and invokes mptcp_pm_create_subflow_or_signal_addr
to try to create a subflow or signal an address for the newly added
address, if local constraint allows that.
Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/19
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
---
net/mptcp/pm_netlink.c | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c
index 6aeadcaef8ae..f1eb3a512fcb 100644
--- a/net/mptcp/pm_netlink.c
+++ b/net/mptcp/pm_netlink.c
@@ -850,6 +850,31 @@ static struct pm_nl_pernet *genl_info_pm_nl(struct genl_info *info)
return net_generic(genl_info_net(info), pm_nl_pernet_id);
}
+static int mptcp_nl_add_subflow_or_signal_addr(struct net *net)
+{
+ struct mptcp_sock *msk;
+ long s_slot = 0, s_num = 0;
+
+ while ((msk = mptcp_token_iter_next(net, &s_slot, &s_num)) != NULL) {
+ struct sock *sk = (struct sock *)msk;
+
+ if (!READ_ONCE(msk->fully_established))
+ goto next;
+
+ lock_sock(sk);
+ spin_lock_bh(&msk->pm.lock);
+ mptcp_pm_create_subflow_or_signal_addr(msk);
+ spin_unlock_bh(&msk->pm.lock);
+ release_sock(sk);
+
+next:
+ sock_put(sk);
+ cond_resched();
+ }
+
+ return 0;
+}
+
static int mptcp_nl_cmd_add_addr(struct sk_buff *skb, struct genl_info *info)
{
struct nlattr *attr = info->attrs[MPTCP_PM_ATTR_ADDR];
@@ -875,6 +900,8 @@ static int mptcp_nl_cmd_add_addr(struct sk_buff *skb, struct genl_info *info)
return ret;
}
+ mptcp_nl_add_subflow_or_signal_addr(sock_net(skb->sk));
+
return 0;
}
--
2.30.0
next prev parent reply other threads:[~2021-02-01 23:12 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-01 23:09 [PATCH net-next v2 00/15] mptcp: ADD_ADDR enhancements Mat Martineau
2021-02-01 23:09 ` [PATCH net-next v2 01/15] mptcp: use WRITE_ONCE for the pernet *_max Mat Martineau
2021-02-01 23:09 ` [PATCH net-next v2 02/15] mptcp: drop *_max fields in mptcp_pm_data Mat Martineau
2021-02-01 23:09 ` Mat Martineau [this message]
2021-02-01 23:09 ` [PATCH net-next v2 04/15] mptcp: send ack for every add_addr Mat Martineau
2021-02-01 23:09 ` [PATCH net-next v2 05/15] selftests: mptcp: use minus values for removing address numbers Mat Martineau
2021-02-01 23:09 ` [PATCH net-next v2 06/15] selftests: mptcp: add testcases for newly added addresses Mat Martineau
2021-02-01 23:09 ` [PATCH net-next v2 07/15] mptcp: create the listening socket for new port Mat Martineau
2021-02-01 23:09 ` [PATCH net-next v2 08/15] mptcp: drop unused skb in subflow_token_join_request Mat Martineau
2021-02-01 23:09 ` [PATCH net-next v2 09/15] mptcp: add a new helper subflow_req_create_thmac Mat Martineau
2021-02-01 23:09 ` [PATCH net-next v2 10/15] mptcp: add port number check for MP_JOIN Mat Martineau
2021-02-01 23:09 ` [PATCH net-next v2 11/15] mptcp: enable use_port when invoke addresses_equal Mat Martineau
2021-02-01 23:09 ` [PATCH net-next v2 12/15] mptcp: deal with MPTCP_PM_ADDR_ATTR_PORT in PM netlink Mat Martineau
2021-02-01 23:09 ` [PATCH net-next v2 13/15] selftests: mptcp: add port argument for pm_nl_ctl Mat Martineau
2021-02-01 23:09 ` [PATCH net-next v2 14/15] mptcp: add the mibs for ADD_ADDR with port Mat Martineau
2021-02-01 23:09 ` [PATCH net-next v2 15/15] selftests: mptcp: add testcases " Mat Martineau
2021-02-03 3:10 ` [PATCH net-next v2 00/15] mptcp: ADD_ADDR enhancements patchwork-bot+netdevbpf
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