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1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  *  linux/include/linux/sunrpc/xprtsock.h
4  *
5  *  Declarations for the RPC transport socket provider.
6  */
7 
8 #ifndef _LINUX_SUNRPC_XPRTSOCK_H
9 #define _LINUX_SUNRPC_XPRTSOCK_H
10 
11 int		init_socket_xprt(void);
12 void		cleanup_socket_xprt(void);
13 unsigned short	get_srcport(struct rpc_xprt *);
14 
15 #define RPC_MIN_RESVPORT	(1U)
16 #define RPC_MAX_RESVPORT	(65535U)
17 #define RPC_DEF_MIN_RESVPORT	(665U)
18 #define RPC_DEF_MAX_RESVPORT	(1023U)
19 
20 struct sock_xprt {
21 	struct rpc_xprt		xprt;
22 
23 	/*
24 	 * Network layer
25 	 */
26 	struct socket *		sock;
27 	struct sock *		inet;
28 	struct file *		file;
29 
30 	/*
31 	 * State of TCP reply receive
32 	 */
33 	struct {
34 		struct {
35 			__be32	fraghdr,
36 				xid,
37 				calldir;
38 		} __attribute__((packed));
39 
40 		u32		offset,
41 				len;
42 
43 		unsigned long	copied;
44 	} recv;
45 
46 	/*
47 	 * State of TCP transmit queue
48 	 */
49 	struct {
50 		u32		offset;
51 	} xmit;
52 
53 	/*
54 	 * Connection of transports
55 	 */
56 	unsigned long		sock_state;
57 	struct delayed_work	connect_worker;
58 	struct work_struct	error_worker;
59 	struct work_struct	recv_worker;
60 	struct mutex		recv_mutex;
61 	struct sockaddr_storage	srcaddr;
62 	unsigned short		srcport;
63 	int			xprt_err;
64 
65 	/*
66 	 * UDP socket buffer size parameters
67 	 */
68 	size_t			rcvsize,
69 				sndsize;
70 
71 	struct rpc_timeout	tcp_timeout;
72 
73 	/*
74 	 * Saved socket callback addresses
75 	 */
76 	void			(*old_data_ready)(struct sock *);
77 	void			(*old_state_change)(struct sock *);
78 	void			(*old_write_space)(struct sock *);
79 	void			(*old_error_report)(struct sock *);
80 };
81 
82 /*
83  * TCP RPC flags
84  */
85 #define XPRT_SOCK_CONNECTING	1U
86 #define XPRT_SOCK_DATA_READY	(2)
87 #define XPRT_SOCK_UPD_TIMEOUT	(3)
88 #define XPRT_SOCK_WAKE_ERROR	(4)
89 #define XPRT_SOCK_WAKE_WRITE	(5)
90 #define XPRT_SOCK_WAKE_PENDING	(6)
91 #define XPRT_SOCK_WAKE_DISCONNECT	(7)
92 #define XPRT_SOCK_CONNECT_SENT	(8)
93 
94 #endif /* _LINUX_SUNRPC_XPRTSOCK_H */
95