diff options
| author |   Paolo Abeni <pabeni@redhat.com> | 2020-09-14 10:01:08 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2020-09-14 13:28:02 -0700 |
| commit | 47bebdf365ade17534f6616dc228d347085f4501 (patch) | |
| tree | a2d69994a872f5906808d65d86d97ba1d08b3827 /net/mptcp | |
| parent | mptcp: rethink 'is writable' conditional (diff) | |
| download | linux-dev-47bebdf365ade17534f6616dc228d347085f4501.tar.xz linux-dev-47bebdf365ade17534f6616dc228d347085f4501.zip | |
mptcp: set data_ready status bit in subflow_check_data_avail()
This simplify mptcp_subflow_data_available() and will
made follow-up patches simpler.
Additionally remove the unneeded checks on subflow copied_seq:
we always whole skbs out of subflows.
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/mptcp')
| -rw-r--r-- | net/mptcp/subflow.c | 19 |
1 files changed, 8 insertions, 11 deletions
diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c index 7ae1d3604047..53b455c3c229 100644 --- a/net/mptcp/subflow.c +++ b/net/mptcp/subflow.c @@ -825,6 +825,8 @@ static bool subflow_check_data_avail(struct sock *ssk) pr_debug("msk=%p ssk=%p data_avail=%d skb=%p", subflow->conn, ssk, subflow->data_avail, skb_peek(&ssk->sk_receive_queue)); + if (!skb_peek(&ssk->sk_receive_queue)) + subflow->data_avail = 0; if (subflow->data_avail) return true; @@ -849,6 +851,7 @@ static bool subflow_check_data_avail(struct sock *ssk) subflow->map_data_len = skb->len; subflow->map_subflow_seq = tcp_sk(ssk)->copied_seq - subflow->ssn_offset; + subflow->data_avail = 1; return true; } @@ -876,8 +879,10 @@ static bool subflow_check_data_avail(struct sock *ssk) ack_seq = mptcp_subflow_get_mapped_dsn(subflow); pr_debug("msk ack_seq=%llx subflow ack_seq=%llx", old_ack, ack_seq); - if (ack_seq == old_ack) + if (ack_seq == old_ack) { + subflow->data_avail = 1; break; + } /* only accept in-sequence mapping. Old values are spurious * retransmission; we can hit "future" values on active backup @@ -922,13 +927,13 @@ fatal: ssk->sk_error_report(ssk); tcp_set_state(ssk, TCP_CLOSE); tcp_send_active_reset(ssk, GFP_ATOMIC); + subflow->data_avail = 0; return false; } bool mptcp_subflow_data_available(struct sock *sk) { struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(sk); - struct sk_buff *skb; /* check if current mapping is still valid */ if (subflow->map_valid && @@ -941,15 +946,7 @@ bool mptcp_subflow_data_available(struct sock *sk) subflow->map_data_len); } - if (!subflow_check_data_avail(sk)) { - subflow->data_avail = 0; - return false; - } - - skb = skb_peek(&sk->sk_receive_queue); - subflow->data_avail = skb && - before(tcp_sk(sk)->copied_seq, TCP_SKB_CB(skb)->end_seq); - return subflow->data_avail; + return subflow_check_data_avail(sk); } /* If ssk has an mptcp parent socket, use the mptcp rcvbuf occupancy, |