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mptcp: drop legacy code around RX EOF

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Thanks to the previous patch -- "mptcp: consolidate fallback and non
fallback state machine" -- we can finally drop the "temporary hack"
used to detect rx eof.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Paolo Abeni 2023-06-20 18:24:22 +02:00 committed by Jakub Kicinski
parent 81c1d02901
commit b7535cfed2
2 changed files with 1 additions and 53 deletions
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49
net/mptcp/protocol.c
View File

@ -894,49 +894,6 @@ bool mptcp_schedule_work(struct sock *sk)
return false;
}
void mptcp_subflow_eof(struct sock *sk)
{
if (!test_and_set_bit(MPTCP_WORK_EOF, &mptcp_sk(sk)->flags))
mptcp_schedule_work(sk);
}
static void mptcp_check_for_eof(struct mptcp_sock *msk)
{
struct mptcp_subflow_context *subflow;
struct sock *sk = (struct sock *)msk;
int receivers = 0;
mptcp_for_each_subflow(msk, subflow)
receivers += !subflow->rx_eof;
if (receivers)
return;
if (!(sk->sk_shutdown & RCV_SHUTDOWN)) {
/* hopefully temporary hack: propagate shutdown status
* to msk, when all subflows agree on it
*/
WRITE_ONCE(sk->sk_shutdown, sk->sk_shutdown | RCV_SHUTDOWN);
smp_mb__before_atomic(); /* SHUTDOWN must be visible first */
sk->sk_data_ready(sk);
}
switch (sk->sk_state) {
case TCP_ESTABLISHED:
inet_sk_state_store(sk, TCP_CLOSE_WAIT);
break;
case TCP_FIN_WAIT1:
inet_sk_state_store(sk, TCP_CLOSING);
break;
case TCP_FIN_WAIT2:
inet_sk_state_store(sk, TCP_CLOSE);
break;
default:
return;
}
mptcp_close_wake_up(sk);
}
static struct sock *mptcp_subflow_recv_lookup(const struct mptcp_sock *msk)
{
struct mptcp_subflow_context *subflow;
@ -2161,9 +2118,6 @@ static int mptcp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
break;
}
if (test_and_clear_bit(MPTCP_WORK_EOF, &msk->flags))
mptcp_check_for_eof(msk);
if (sk->sk_shutdown & RCV_SHUTDOWN) {
/* race breaker: the shutdown could be after the
* previous receive queue check
@ -2681,9 +2635,6 @@ static void mptcp_worker(struct work_struct *work)
mptcp_pm_nl_work(msk);
if (test_and_clear_bit(MPTCP_WORK_EOF, &msk->flags))
mptcp_check_for_eof(msk);
mptcp_check_send_data_fin(sk);
mptcp_check_data_fin_ack(sk);
mptcp_check_data_fin(sk);

5
net/mptcp/protocol.h
View File

@ -113,7 +113,6 @@
/* MPTCP socket atomic flags */
#define MPTCP_NOSPACE 1
#define MPTCP_WORK_RTX 2
#define MPTCP_WORK_EOF 3
#define MPTCP_FALLBACK_DONE 4
#define MPTCP_WORK_CLOSE_SUBFLOW 5
@ -476,14 +475,13 @@ struct mptcp_subflow_context {
send_mp_fail : 1,
send_fastclose : 1,
send_infinite_map : 1,
rx_eof : 1,
remote_key_valid : 1, /* received the peer key from */
disposable : 1, /* ctx can be free at ulp release time */
stale : 1, /* unable to snd/rcv data, do not use for xmit */
local_id_valid : 1, /* local_id is correctly initialized */
valid_csum_seen : 1, /* at least one csum validated */
is_mptfo : 1, /* subflow is doing TFO */
__unused : 8;
__unused : 9;
enum mptcp_data_avail data_avail;
u32 remote_nonce;
u64 thmac;
@ -720,7 +718,6 @@ static inline u64 mptcp_expand_seq(u64 old_seq, u64 cur_seq, bool use_64bit)
void __mptcp_check_push(struct sock *sk, struct sock *ssk);
void __mptcp_data_acked(struct sock *sk);
void __mptcp_error_report(struct sock *sk);
void mptcp_subflow_eof(struct sock *sk);
bool mptcp_update_rcv_data_fin(struct mptcp_sock *msk, u64 data_fin_seq, bool use_64bit);
static inline bool mptcp_data_fin_enabled(const struct mptcp_sock *msk)
{