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mptcp: factor out __mptcp_retrans helper()

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Will simplify the following patch, no functional change
intended.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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:
Paolo Abeni 2021-03-04 13:32:13 -08:00 committed by David S. Miller
parent c8fe62f076
commit 2948d0a1e5
1 changed files with 50 additions and 43 deletions
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93
net/mptcp/protocol.c
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@ -2261,14 +2261,58 @@ static void mptcp_check_fastclose(struct mptcp_sock *msk)
mptcp_close_wake_up(sk);
}
static void mptcp_worker(struct work_struct *work)
static void __mptcp_retrans(struct sock *sk)
{
struct mptcp_sock *msk = container_of(work, struct mptcp_sock, work);
struct sock *ssk, *sk = &msk->sk.icsk_inet.sk;
struct mptcp_sock *msk = mptcp_sk(sk);
struct mptcp_sendmsg_info info = {};
struct mptcp_data_frag *dfrag;
size_t copied = 0;
int state, ret;
struct sock *ssk;
int ret;
__mptcp_clean_una(sk);
dfrag = mptcp_rtx_head(sk);
if (!dfrag)
return;
ssk = mptcp_subflow_get_retrans(msk);
if (!ssk)
goto reset_timer;
lock_sock(ssk);
/* limit retransmission to the bytes already sent on some subflows */
info.sent = 0;
info.limit = dfrag->already_sent;
while (info.sent < dfrag->already_sent) {
if (!mptcp_alloc_tx_skb(sk, ssk))
break;
ret = mptcp_sendmsg_frag(sk, ssk, dfrag, &info);
if (ret <= 0)
break;
MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_RETRANSSEGS);
copied += ret;
info.sent += ret;
}
if (copied)
tcp_push(ssk, 0, info.mss_now, tcp_sk(ssk)->nonagle,
info.size_goal);
mptcp_set_timeout(sk, ssk);
release_sock(ssk);
reset_timer:
if (!mptcp_timer_pending(sk))
mptcp_reset_timer(sk);
}
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;
int state;
lock_sock(sk);
state = sk->sk_state;
@ -2303,45 +2347,8 @@ static void mptcp_worker(struct work_struct *work)
if (test_and_clear_bit(MPTCP_WORK_CLOSE_SUBFLOW, &msk->flags))
__mptcp_close_subflow(msk);
if (!test_and_clear_bit(MPTCP_WORK_RTX, &msk->flags))
goto unlock;
__mptcp_clean_una(sk);
dfrag = mptcp_rtx_head(sk);
if (!dfrag)
goto unlock;
ssk = mptcp_subflow_get_retrans(msk);
if (!ssk)
goto reset_unlock;
lock_sock(ssk);
/* limit retransmission to the bytes already sent on some subflows */
info.sent = 0;
info.limit = dfrag->already_sent;
while (info.sent < dfrag->already_sent) {
if (!mptcp_alloc_tx_skb(sk, ssk))
break;
ret = mptcp_sendmsg_frag(sk, ssk, dfrag, &info);
if (ret <= 0)
break;
MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_RETRANSSEGS);
copied += ret;
info.sent += ret;
}
if (copied)
tcp_push(ssk, 0, info.mss_now, tcp_sk(ssk)->nonagle,
info.size_goal);
mptcp_set_timeout(sk, ssk);
release_sock(ssk);
reset_unlock:
if (!mptcp_timer_pending(sk))
mptcp_reset_timer(sk);
if (test_and_clear_bit(MPTCP_WORK_RTX, &msk->flags))
__mptcp_retrans(sk);
unlock:
release_sock(sk);