7 #define pr_fmt(fmt) "MPTCP: " fmt
24 #include <net/mptcp.h>
34 #include <trace/events/mptcp.h>
205  * - mptcp does not maintain a msk-level window clamp
240  * - use mptcp seqs
724 			/* Under fallback skbs have no MPTCP extension and TCP could  in __mptcp_move_skbs_from_subflow()
859 /* In most cases we will be able to lock the mptcp socket.  If its already
1019 	/* can collapse only if MPTCP level sequence is in order and this  in mptcp_skb_can_collapse_to()
1487 /* implement the mptcp packet scheduler;
1585 	/* snd_nxt_new can be smaller than snd_nxt in case mptcp  in mptcp_update_post_push()
1798 	/* on flags based fastopen the mptcp is supposed to create the  in mptcp_sendmsg_fastopen()
1991 		/* charge data on mptcp pending queue to the msk socket  in mptcp_sendmsg()
2171 		 * the mptcp rx queue fast enough (announced rcv_win can  in mptcp_rcv_space_adjust()
2336 		/* only the MPTCP socket status is relevant here. The exit  in mptcp_recvmsg()
2479 	 * some data in the mptcp rtx queue has not really xmitted yet.  in __mptcp_retransmit_pending_data()
2480 	 * keep it simple and re-inject the whole mptcp level rtx queue  in __mptcp_retransmit_pending_data()
2520 		/* The MPTCP code never wait on the subflow sockets, TCP-level  in __mptcp_subflow_disconnect()
2535  * so we need to use tcp_close() after detaching them from the mptcp
2566 	 * already deleted by inet_child_forget() and the mptcp socket can't  in __mptcp_close_ssk()
3041 	/* re-use the csk retrans timer for MPTCP-level retrans */  in __mptcp_init_sock()
3157 		/* Unlike TCP, MPTCP sk would not have the TCP_SYN_RECV state:  in mptcp_set_state()
3158 		 * MPTCP "accepted" sockets will be created later on. So no  in mptcp_set_state()
3308 		 * do the MPTCP equivalent of TCP reset, aka MPTCP fastclose  in __mptcp_close()
3333 		 * push incoming data into the mptcp stack, to properly ack it  in __mptcp_close()
3590 	 * created mptcp socket  in mptcp_sk_clone_init()
3705  * MPTCP uses the delack timer to do 3rd ack retransmissions
3757 	 * we hash the TCP subflows not the MPTCP socket  in mptcp_hash()
3837 	/* mptcp socket already closing? */  in mptcp_finish_join()
3980 	/* no MPTCP if MD5SIG is enabled on this socket or we may run out of  in mptcp_connect()
4044 	.name		= "MPTCP",
4155 		 * or MPTCP can later unexpectedly observe unaccounted memory.  in mptcp_graft_subflows()
4169 		/* Set ssk->sk_socket of accept()ed flows to mptcp socket.  in mptcp_graft_subflows()
4226 	pr_debug("newsk=%p, subflow is mptcp=%d\n", newsk, sk_is_mptcp(newsk));  in mptcp_stream_accept()
4272 		 * flow: sk is a tcp_sk, not an mptcp one.  in mptcp_stream_accept()
4275 		 * bypass mptcp.  in mptcp_stream_accept()
4441  *  mptcp_splice_read - splice data from MPTCP socket to a pipe
4618 		panic("Failed to allocate MPTCP pcpu counter\n");  in mptcp_proto_init()
4622 		panic("Failed to allocate MPTCP dummy netdev\n");  in mptcp_proto_init()
4637 		panic("Failed to register MPTCP proto.\n");  in mptcp_proto_init()