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mptcp: split __mptcp_close_ssk helper 

Prepare for subflow close events:

When mptcp connection is torn down its enough to send the mptcp socket
close notification rather than a subflow close event for all of the
subflows followed by the mptcp close event.

This splits the helper: mptcp_close_ssk() will emit the close
notification, __mptcp_close_ssk will not.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Westphal 2021-02-12 15:59:55 -08:00 committed by David S. Miller
parent e980143068
commit a141e02e39
3 changed files with 13 additions and 7 deletions
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4
net/mptcp/pm_netlink.c
View File

@ -594,7 +594,7 @@ static void mptcp_pm_nl_rm_addr_received(struct mptcp_sock *msk)
spin_unlock_bh(&msk->pm.lock);
mptcp_subflow_shutdown(sk, ssk, how);
__mptcp_close_ssk(sk, ssk, subflow);
mptcp_close_ssk(sk, ssk, subflow);
spin_lock_bh(&msk->pm.lock);
msk->pm.add_addr_accepted--;
@ -664,7 +664,7 @@ void mptcp_pm_nl_rm_subflow_received(struct mptcp_sock *msk, u8 rm_id)
spin_unlock_bh(&msk->pm.lock);
mptcp_subflow_shutdown(sk, ssk, how);
__mptcp_close_ssk(sk, ssk, subflow);
mptcp_close_ssk(sk, ssk, subflow);
spin_lock_bh(&msk->pm.lock);
msk->pm.local_addr_used--;

12
net/mptcp/protocol.c
View File

@ -2114,8 +2114,8 @@ static struct sock *mptcp_subflow_get_retrans(const struct mptcp_sock *msk)
* so we need to use tcp_close() after detaching them from the mptcp
* parent socket.
*/
void __mptcp_close_ssk(struct sock *sk, struct sock *ssk,
struct mptcp_subflow_context *subflow)
static void __mptcp_close_ssk(struct sock *sk, struct sock *ssk,
struct mptcp_subflow_context *subflow)
{
list_del(&subflow->node);
@ -2147,6 +2147,12 @@ void __mptcp_close_ssk(struct sock *sk, struct sock *ssk,
sock_put(ssk);
}
void mptcp_close_ssk(struct sock *sk, struct sock *ssk,
struct mptcp_subflow_context *subflow)
{
__mptcp_close_ssk(sk, ssk, subflow);
}
static unsigned int mptcp_sync_mss(struct sock *sk, u32 pmtu)
{
return 0;
@ -2164,7 +2170,7 @@ static void __mptcp_close_subflow(struct mptcp_sock *msk)
if (inet_sk_state_load(ssk) != TCP_CLOSE)
continue;
__mptcp_close_ssk((struct sock *)msk, ssk, subflow);
mptcp_close_ssk((struct sock *)msk, ssk, subflow);
}
}

4
net/mptcp/protocol.h
View File

@ -539,8 +539,8 @@ void mptcp_subflow_fully_established(struct mptcp_subflow_context *subflow,
bool mptcp_subflow_data_available(struct sock *sk);
void __init mptcp_subflow_init(void);
void mptcp_subflow_shutdown(struct sock *sk, struct sock *ssk, int how);
void __mptcp_close_ssk(struct sock *sk, struct sock *ssk,
struct mptcp_subflow_context *subflow);
void mptcp_close_ssk(struct sock *sk, struct sock *ssk,
struct mptcp_subflow_context *subflow);
void mptcp_subflow_reset(struct sock *ssk);
void mptcp_sock_graft(struct sock *sk, struct socket *parent);
struct socket *__mptcp_nmpc_socket(const struct mptcp_sock *msk);