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mptcp: add work queue skeleton

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Will be extended with functionality in followup patches.
Initial user is moving skbs from subflows receive queue to
the mptcp-level receive queue.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Paolo Abeni 2020-02-26 10:14:47 +01:00 committed by David S. Miller
parent 101f6f851e
commit 8099201715
2 changed files with 23 additions and 0 deletions
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22
net/mptcp/protocol.c
View file

@ -551,12 +551,24 @@ static void __mptcp_close_ssk(struct sock *sk, struct sock *ssk,
}
}
static void mptcp_worker(struct work_struct *work)
{
struct mptcp_sock *msk = container_of(work, struct mptcp_sock, work);
struct sock *sk = &msk->sk.icsk_inet.sk;
lock_sock(sk);
release_sock(sk);
sock_put(sk);
}
static int __mptcp_init_sock(struct sock *sk)
{
struct mptcp_sock *msk = mptcp_sk(sk);
INIT_LIST_HEAD(&msk->conn_list);
__set_bit(MPTCP_SEND_SPACE, &msk->flags);
INIT_WORK(&msk->work, mptcp_worker);
msk->first = NULL;
@ -571,6 +583,14 @@ static int mptcp_init_sock(struct sock *sk)
return __mptcp_init_sock(sk);
}
static void mptcp_cancel_work(struct sock *sk)
{
struct mptcp_sock *msk = mptcp_sk(sk);
if (cancel_work_sync(&msk->work))
sock_put(sk);
}
static void mptcp_subflow_shutdown(struct sock *ssk, int how)
{
lock_sock(ssk);
@ -616,6 +636,8 @@ static void mptcp_close(struct sock *sk, long timeout)
__mptcp_close_ssk(sk, ssk, subflow, timeout);
}
mptcp_cancel_work(sk);
sk_common_release(sk);
}

1
net/mptcp/protocol.h
View file

@ -70,6 +70,7 @@ struct mptcp_sock {
u32 token;
unsigned long flags;
bool can_ack;
struct work_struct work;
struct list_head conn_list;
struct skb_ext *cached_ext; /* for the next sendmsg */
struct socket *subflow; /* outgoing connect/listener/!mp_capable */