/* SPDX-License-Identifier: GPL-2.0 */
/*
 *  linux/include/linux/sunrpc/xprtsock.h
 *
 *  Declarations for the RPC transport socket provider.
 */

#ifndef _LINUX_SUNRPC_XPRTSOCK_H
#define _LINUX_SUNRPC_XPRTSOCK_H

int             init_socket_xprt(void);
void            cleanup_socket_xprt(void);

#define RPC_MIN_RESVPORT        (1U)
#define RPC_MAX_RESVPORT        (65535U)
#define RPC_DEF_MIN_RESVPORT    (665U)
#define RPC_DEF_MAX_RESVPORT    (1023U)

struct sock_xprt {
        struct rpc_xprt         xprt;

        /*
         * Network layer
         */
        struct socket *         sock;
        struct sock *           inet;
        struct file *           file;

        /*
         * State of TCP reply receive
         */
        struct {
                struct {
                        __be32  fraghdr,
                                xid,
                                calldir;
                } __attribute__((packed));

                u32             offset,
                                len;

                unsigned long   copied;
        } recv;

        /*
         * State of TCP transmit queue
         */
        struct {
                u32             offset;
        } xmit;

        /*
         * Connection of transports
         */
        unsigned long           sock_state;
        struct delayed_work     connect_worker;
        struct work_struct      error_worker;
        struct work_struct      recv_worker;
        struct mutex            recv_mutex;
        struct completion       handshake_done;
        struct sockaddr_storage srcaddr;
        unsigned short          srcport;
        int                     xprt_err;
        struct rpc_clnt         *clnt;

        /*
         * UDP socket buffer size parameters
         */
        size_t                  rcvsize,
                                sndsize;

        struct rpc_timeout      tcp_timeout;

        /*
         * Saved socket callback addresses
         */
        void                    (*old_data_ready)(struct sock *);
        void                    (*old_state_change)(struct sock *);
        void                    (*old_write_space)(struct sock *);
        void                    (*old_error_report)(struct sock *);
};

/*
 * TCP RPC flags
 */
#define XPRT_SOCK_CONNECTING    1U
#define XPRT_SOCK_DATA_READY    (2)
#define XPRT_SOCK_UPD_TIMEOUT   (3)
#define XPRT_SOCK_WAKE_ERROR    (4)
#define XPRT_SOCK_WAKE_WRITE    (5)
#define XPRT_SOCK_WAKE_PENDING  (6)
#define XPRT_SOCK_WAKE_DISCONNECT       (7)
#define XPRT_SOCK_CONNECT_SENT  (8)
#define XPRT_SOCK_NOSPACE       (9)
#define XPRT_SOCK_IGNORE_RECV   (10)

#endif /* _LINUX_SUNRPC_XPRTSOCK_H */