10  * - There are two kinds of sockets: those created by user action (such as
13  * - There are two "global" tables, one for bound sockets (sockets that have
15  * sockets (sockets that have established a connection with another socket).
16  * These tables are "global" in that all sockets on the system are placed
18  * for a list of unbound sockets and SOCK_DGRAM sockets will always remain in
19  * that list. The bound table is used solely for lookup of sockets when packets
20  * are received and that's not necessary for SOCK_DGRAM sockets since we create
22  * sockets out of the bound hash buckets will reduce the chance of collisions
23  * when looking for SOCK_STREAM sockets and prevents us from having to check the
26  * - Sockets created by user action will either be "client" sockets that
27  * initiate a connection or "server" sockets that listen for connections; we do
28  * not support simultaneous connects (two "client" sockets connecting).
30  * - "Server" sockets are referred to as listener sockets throughout this
34  * sockets are placed on the pending connection list of the listener socket.
40  * socket's accept queue.  Callers of accept(2) will accept connected sockets
46  * - It is possible that these pending sockets will never reach the connected
53  * function will also cleanup rejected sockets, those that reach the connected
56  * - Lock ordering for pending or accept queue sockets is:
64  * - Sockets created by user action will be cleaned up when the user process
68  * perform additional cleanup that's common for both types of sockets.
155  * Unbound sockets are all put on the same list attached to the end of the hash
156  * table (vsock_unbound_sockets).  Bound sockets are added to the hash table in
162  * vsock_bind_table[VSOCK_HASH_SIZE - 1] are for bound sockets and
163  * vsock_bind_table[VSOCK_HASH_SIZE] is for unbound sockets.  The hash function
495 	 * while there are open sockets assigned to it.  in vsock_assign_transport()
601 		 * just need to drop our references to the sockets and be on  in vsock_pending_work()
608 	/* We need to remove ourself from the global connected sockets list so  in vsock_pending_work()
672 	/* Remove connection oriented sockets from the unbound list and add them  in __vsock_bind_connectible()
746 	 * non-NULL. We make sure that our sockets always have a type by  in __vsock_create()
824 		/* Clean up any sockets that never were accepted. */  in __vsock_release()
1043 	/* INET sockets treat local write shutdown and peer write shutdown as a  in vsock_poll()
1058 		/* For datagram sockets we can read if there is something in  in vsock_poll()
1077 		/* Listening sockets that have connections in their accept  in vsock_poll()
1100 		/* Sockets whose connections have been closed, reset, or  in vsock_poll()
1109 		/* Connected sockets that can produce data can be written. */  in vsock_poll()
1120 						 * sockets are not setting it.  in vsock_poll()
1262 	/* sock map disallows redirection of non-TCP sockets with sk_state !=  in vsock_dgram_connect()
1266 	 * This doesn't seem to be abnormal state for datagram sockets, as the  in vsock_dgram_connect()
1268 	 * (such as unix sockets).  in vsock_dgram_connect()
1586 	/* Wait for children sockets to appear; these are the new sockets  in vsock_accept()
1901 	 * sockets.  in vsock_connectible_sendmsg()
1948 			/* Don't wait for non-blocking sockets. */  in vsock_connectible_sendmsg()
2065 		/* Don't wait for non-blocking sockets. */  in vsock_connectible_wait_data()