text: /* SPDX-License-Identifier: GPL-2.0 */
  /*
   * linux/include/linux/sunrpc/svcsock.h
   *
   * RPC server socket I/O.
   *
   * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
   */
  
  #ifndef SUNRPC_SVCSOCK_H
  #define SUNRPC_SVCSOCK_H
  
  #include <linux/sunrpc/svc.h>
  #include <linux/sunrpc/svc_xprt.h>
  
  /*
   * RPC server socket.
   */
  struct svc_sock {
  	struct svc_xprt		sk_xprt;
  	struct socket *		sk_sock;	/* berkeley socket layer */
  	struct sock *		sk_sk;		/* INET layer */
  
  	/* We keep the old state_change and data_ready CB's here */
  	void			(*sk_ostate)(struct sock *);
  	void			(*sk_odata)(struct sock *);
  	void			(*sk_owspace)(struct sock *);
  
  	/* private TCP part */
  	/* On-the-wire fragment header: */
  	__be32			sk_marker;
  	/* As we receive a record, this includes the length received so
  	 * far (including the fragment header): */
  	u32			sk_tcplen;
  	/* Total length of the data (not including fragment headers)
  	 * received so far in the fragments making up this rpc: */
  	u32			sk_datalen;
  
  	struct page *		sk_pages[RPCSVC_MAXPAGES];	/* received data */
  };
  
  static inline u32 svc_sock_reclen(struct svc_sock *svsk)
  {
  	return be32_to_cpu(svsk->sk_marker) & RPC_FRAGMENT_SIZE_MASK;
  }
  
  static inline u32 svc_sock_final_rec(struct svc_sock *svsk)
  {
  	return be32_to_cpu(svsk->sk_marker) & RPC_LAST_STREAM_FRAGMENT;
  }
  
  /*
   * Function prototypes.
   */
  void		svc_close_net(struct svc_serv *, struct net *);
  int		svc_recv(struct svc_rqst *, long);
  int		svc_send(struct svc_rqst *);
  void		svc_drop(struct svc_rqst *);
  void		svc_sock_update_bufs(struct svc_serv *serv);
  bool		svc_alien_sock(struct net *net, int fd);
  int		svc_addsock(struct svc_serv *serv, const int fd,
  					char *name_return, const size_t len,
  					const struct cred *cred);
  void		svc_init_xprt_sock(void);
  void		svc_cleanup_xprt_sock(void);
  struct svc_xprt *svc_sock_create(struct svc_serv *serv, int prot);
  void		svc_sock_destroy(struct svc_xprt *);
  
  /*
   * svc_makesock socket characteristics
   */
  #define SVC_SOCK_DEFAULTS	(0U)
  #define SVC_SOCK_ANONYMOUS	(1U << 0)	/* don't register with pmap */
  #define SVC_SOCK_TEMPORARY	(1U << 1)	/* flag socket as temporary */
  
  #endif /* SUNRPC_SVCSOCK_H */
  