diff options
| -rw-r--r-- | net/mptcp/options.c | 17 | ||||
| -rw-r--r-- | net/mptcp/protocol.c | 33 | ||||
| -rw-r--r-- | net/mptcp/protocol.h | 4 |
3 files changed, 54 insertions, 0 deletions
diff --git a/net/mptcp/options.c b/net/mptcp/options.c index 1ca60d9da3ef..5e7d7755d1a6 100644 --- a/net/mptcp/options.c +++ b/net/mptcp/options.c @@ -282,6 +282,16 @@ static void mptcp_parse_option(const struct sk_buff *skb, pr_debug("RM_ADDR: id=%d", mp_opt->rm_id); break; + case MPTCPOPT_MP_FASTCLOSE: + if (opsize != TCPOLEN_MPTCP_FASTCLOSE) + break; + + ptr += 2; + mp_opt->rcvr_key = get_unaligned_be64(ptr); + ptr += 8; + mp_opt->fastclose = 1; + break; + default: break; } @@ -299,6 +309,7 @@ void mptcp_get_options(const struct sk_buff *skb, mp_opt->mp_join = 0; mp_opt->add_addr = 0; mp_opt->ahmac = 0; + mp_opt->fastclose = 0; mp_opt->port = 0; mp_opt->rm_addr = 0; mp_opt->dss = 0; @@ -942,6 +953,12 @@ void mptcp_incoming_options(struct sock *sk, struct sk_buff *skb) if (!check_fully_established(msk, sk, subflow, skb, &mp_opt)) return; + if (mp_opt.fastclose && + msk->local_key == mp_opt.rcvr_key) { + WRITE_ONCE(msk->rcv_fastclose, true); + mptcp_schedule_work((struct sock *)msk); + } + if (mp_opt.add_addr && add_addr_hmac_valid(msk, &mp_opt)) { struct mptcp_addr_info addr; diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index 2540d82742ac..cb8b7adf218a 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -2217,6 +2217,36 @@ static bool mptcp_check_close_timeout(const struct sock *sk) return true; } +static void mptcp_check_fastclose(struct mptcp_sock *msk) +{ + struct mptcp_subflow_context *subflow, *tmp; + struct sock *sk = &msk->sk.icsk_inet.sk; + + if (likely(!READ_ONCE(msk->rcv_fastclose))) + return; + + mptcp_token_destroy(msk); + + list_for_each_entry_safe(subflow, tmp, &msk->conn_list, node) { + struct sock *tcp_sk = mptcp_subflow_tcp_sock(subflow); + + lock_sock(tcp_sk); + if (tcp_sk->sk_state != TCP_CLOSE) { + tcp_send_active_reset(tcp_sk, GFP_ATOMIC); + tcp_set_state(tcp_sk, TCP_CLOSE); + } + release_sock(tcp_sk); + } + + inet_sk_state_store(sk, TCP_CLOSE); + sk->sk_shutdown = SHUTDOWN_MASK; + smp_mb__before_atomic(); /* SHUTDOWN must be visible first */ + set_bit(MPTCP_DATA_READY, &msk->flags); + set_bit(MPTCP_WORK_CLOSE_SUBFLOW, &msk->flags); + + mptcp_close_wake_up(sk); +} + static void mptcp_worker(struct work_struct *work) { struct mptcp_sock *msk = container_of(work, struct mptcp_sock, work); @@ -2233,6 +2263,9 @@ static void mptcp_worker(struct work_struct *work) mptcp_check_data_fin_ack(sk); __mptcp_flush_join_list(msk); + + mptcp_check_fastclose(msk); + if (test_and_clear_bit(MPTCP_WORK_CLOSE_SUBFLOW, &msk->flags)) __mptcp_close_subflow(msk); diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h index a5bc9599ae5c..7cf9d110b85f 100644 --- a/net/mptcp/protocol.h +++ b/net/mptcp/protocol.h @@ -23,6 +23,7 @@ #define OPTION_MPTCP_ADD_ADDR BIT(6) #define OPTION_MPTCP_ADD_ADDR6 BIT(7) #define OPTION_MPTCP_RM_ADDR BIT(8) +#define OPTION_MPTCP_FASTCLOSE BIT(9) /* MPTCP option subtypes */ #define MPTCPOPT_MP_CAPABLE 0 @@ -58,6 +59,7 @@ #define TCPOLEN_MPTCP_ADD_ADDR6_BASE_PORT 24 #define TCPOLEN_MPTCP_PORT_LEN 4 #define TCPOLEN_MPTCP_RM_ADDR_BASE 4 +#define TCPOLEN_MPTCP_FASTCLOSE 12 /* MPTCP MP_JOIN flags */ #define MPTCPOPT_BACKUP BIT(0) @@ -110,6 +112,7 @@ struct mptcp_options_received { u16 data_len; u16 mp_capable : 1, mp_join : 1, + fastclose : 1, dss : 1, add_addr : 1, rm_addr : 1, @@ -237,6 +240,7 @@ struct mptcp_sock { bool fully_established; bool rcv_data_fin; bool snd_data_fin_enable; + bool rcv_fastclose; bool use_64bit_ack; /* Set when we received a 64-bit DSN */ spinlock_t join_list_lock; struct sock *ack_hint; |