diff options
| author | Paolo Abeni <pabeni@redhat.com> | 2020-11-16 12:48:08 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2020-11-16 21:46:07 +0300 |
| commit | eaa2ffabfc35580da3fb1d31897fb696c514ea7a (patch) | |
| tree | db61feb8c434dec1b3404384651e0cd08f628cf0 /net/mptcp/protocol.h | |
| parent | f0e6a4cf11f16425ccdc69f4410e4fe59719a9ea (diff) | |
| download | linux-eaa2ffabfc35580da3fb1d31897fb696c514ea7a.tar.xz | |
mptcp: introduce MPTCP snd_nxt
Track the next MPTCP sequence number used on xmit,
currently always equal to write_next.
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/mptcp/protocol.h')
| -rw-r--r-- | net/mptcp/protocol.h | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h index ec17f9c367c5..946319cf9cca 100644 --- a/net/mptcp/protocol.h +++ b/net/mptcp/protocol.h @@ -92,6 +92,13 @@ #define MPTCP_FALLBACK_DONE 4 #define MPTCP_WORK_CLOSE_SUBFLOW 5 +static inline bool before64(__u64 seq1, __u64 seq2) +{ + return (__s64)(seq1 - seq2) < 0; +} + +#define after64(seq2, seq1) before64(seq1, seq2) + struct mptcp_options_received { u64 sndr_key; u64 rcvr_key; @@ -201,6 +208,7 @@ struct mptcp_sock { u64 local_key; u64 remote_key; u64 write_seq; + u64 snd_nxt; u64 ack_seq; u64 rcv_data_fin_seq; struct sock *last_snd; @@ -276,7 +284,7 @@ static inline struct mptcp_data_frag *mptcp_rtx_tail(const struct sock *sk) { struct mptcp_sock *msk = mptcp_sk(sk); - if (list_empty(&msk->rtx_queue)) + if (!before64(msk->snd_nxt, atomic64_read(&msk->snd_una))) return NULL; return list_last_entry(&msk->rtx_queue, struct mptcp_data_frag, list); @@ -528,13 +536,6 @@ static inline struct mptcp_ext *mptcp_get_ext(struct sk_buff *skb) return (struct mptcp_ext *)skb_ext_find(skb, SKB_EXT_MPTCP); } -static inline bool before64(__u64 seq1, __u64 seq2) -{ - return (__s64)(seq1 - seq2) < 0; -} - -#define after64(seq2, seq1) before64(seq1, seq2) - void mptcp_diag_subflow_init(struct tcp_ulp_ops *ops); static inline bool __mptcp_check_fallback(const struct mptcp_sock *msk) |