@@ -336,7 +336,6 @@ static bool mptcp_established_options_dss(struct sock *sk, struct sk_buff *skb,
unsigned int ack_size;
bool ret = false;
bool can_ack;
- u64 ack_seq;
u8 tcp_fin;
if (skb) {
@@ -368,16 +367,7 @@ static bool mptcp_established_options_dss(struct sock *sk, struct sk_buff *skb,
can_ack = true;
opts->ext_copy.use_ack = 0;
msk = mptcp_sk(subflow->conn);
- if (likely(msk && READ_ONCE(msk->can_ack))) {
- ack_seq = msk->ack_seq;
- } else if (subflow->can_ack) {
- mptcp_crypto_key_sha(subflow->remote_key, NULL, &ack_seq);
- ack_seq++;
- } else {
- can_ack = false;
- }
-
- if (unlikely(!can_ack)) {
+ if (!READ_ONCE(msk->can_ack)) {
*size = ALIGN(dss_size, 4);
return ret;
}
@@ -390,7 +380,7 @@ static bool mptcp_established_options_dss(struct sock *sk, struct sk_buff *skb,
dss_size += ack_size;
- opts->ext_copy.data_ack = ack_seq;
+ opts->ext_copy.data_ack = msk->ack_seq;
opts->ext_copy.ack64 = 1;
opts->ext_copy.use_ack = 1;
@@ -112,7 +112,7 @@ static void subflow_finish_connect(struct sock *sk, const struct sk_buff *skb)
subflow->icsk_af_ops->sk_rx_dst_set(sk, skb);
- if (subflow->conn && !subflow->conn_finished) {
+ if (!subflow->conn_finished) {
pr_debug("subflow=%p, remote_key=%llu", mptcp_subflow_ctx(sk),
subflow->remote_key);
mptcp_finish_connect(sk);
@@ -439,9 +439,6 @@ static bool subflow_check_data_avail(struct sock *ssk)
if (subflow->data_avail)
return true;
- if (!subflow->conn)
- return false;
-
msk = mptcp_sk(subflow->conn);
for (;;) {
u32 map_remaining;
@@ -561,11 +558,10 @@ static void subflow_data_ready(struct sock *sk)
struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(sk);
struct sock *parent = subflow->conn;
- if (!parent || !subflow->mp_capable) {
+ if (!subflow->mp_capable) {
subflow->tcp_data_ready(sk);
- if (parent)
- parent->sk_data_ready(parent);
+ parent->sk_data_ready(parent);
return;
}
@@ -579,7 +575,7 @@ static void subflow_write_space(struct sock *sk)
struct sock *parent = subflow->conn;
sk_stream_write_space(sk);
- if (parent && sk_stream_is_writeable(sk)) {
+ if (sk_stream_is_writeable(sk)) {
set_bit(MPTCP_SEND_SPACE, &mptcp_sk(parent)->flags);
smp_mb__after_atomic();
/* set SEND_SPACE before sk_stream_write_space clears NOSPACE */
@@ -694,7 +690,7 @@ static bool subflow_is_done(const struct sock *sk)
static void subflow_state_change(struct sock *sk)
{
struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(sk);
- struct sock *parent = READ_ONCE(subflow->conn);
+ struct sock *parent = subflow->conn;
__subflow_state_change(sk);
@@ -702,10 +698,10 @@ static void subflow_state_change(struct sock *sk)
* a fin packet carrying a DSS can be unnoticed if we don't trigger
* the data available machinery here.
*/
- if (parent && subflow->mp_capable && mptcp_subflow_data_available(sk))
+ if (subflow->mp_capable && mptcp_subflow_data_available(sk))
mptcp_data_ready(parent, sk);
- if (parent && !(parent->sk_shutdown & RCV_SHUTDOWN) &&
+ if (!(parent->sk_shutdown & RCV_SHUTDOWN) &&
!subflow->rx_eof && subflow_is_done(sk)) {
subflow->rx_eof = 1;
parent->sk_shutdown |= RCV_SHUTDOWN;
After the previous patch subflow->conn is always != NULL and is never changed. We can drop a bunch of now unneeded checks. v1 -> v2: - rebased on top of commit 2398e3991bda ("mptcp: always include dack if possible.") Signed-off-by: Paolo Abeni <pabeni@redhat.com> --- net/mptcp/options.c | 14 ++------------ net/mptcp/subflow.c | 18 +++++++----------- 2 files changed, 9 insertions(+), 23 deletions(-)