LXR linux/include/linux/sunrpc/svcsock.h

   1/*
   2 * linux/include/linux/sunrpc/svcsock.h
   3 *
   4 * RPC server socket I/O.
   5 *
   6 * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
   7 */
   8
   9#ifndef SUNRPC_SVCSOCK_H
  10#define SUNRPC_SVCSOCK_H
  11
  12#include <linux/sunrpc/svc.h>
  13
  14/*
  15 * RPC server socket.
  16 */
  17struct svc_sock {
  18        struct list_head        sk_ready;       /* list of ready sockets */
  19        struct list_head        sk_list;        /* list of all sockets */
  20        struct socket *         sk_sock;        /* berkeley socket layer */
  21        struct sock *           sk_sk;          /* INET layer */
  22
  23        struct svc_pool *       sk_pool;        /* current pool iff queued */
  24        struct svc_serv *       sk_server;      /* service for this socket */
  25        atomic_t                sk_inuse;       /* use count */
  26        unsigned long           sk_flags;
  27#define SK_BUSY         0                       /* enqueued/receiving */
  28#define SK_CONN         1                       /* conn pending */
  29#define SK_CLOSE        2                       /* dead or dying */
  30#define SK_DATA         3                       /* data pending */
  31#define SK_TEMP         4                       /* temp (TCP) socket */
  32#define SK_DEAD         6                       /* socket closed */
  33#define SK_CHNGBUF      7                       /* need to change snd/rcv buffer sizes */
  34#define SK_DEFERRED     8                       /* request on sk_deferred */
  35#define SK_OLD          9                       /* used for temp socket aging mark+sweep */
  36#define SK_DETACHED     10                      /* detached from tempsocks list */
  37
  38        atomic_t                sk_reserved;    /* space on outq that is reserved */
  39
  40        spinlock_t              sk_lock;        /* protects sk_deferred and
  41                                                 * sk_info_authunix */
  42        struct list_head        sk_deferred;    /* deferred requests that need to
  43                                                 * be revisted */
  44        struct mutex            sk_mutex;       /* to serialize sending data */
  45
  46        int                     (*sk_recvfrom)(struct svc_rqst *rqstp);
  47        int                     (*sk_sendto)(struct svc_rqst *rqstp);
  48
  49        /* We keep the old state_change and data_ready CB's here */
  50        void                    (*sk_ostate)(struct sock *);
  51        void                    (*sk_odata)(struct sock *, int bytes);
  52        void                    (*sk_owspace)(struct sock *);
  53
  54        /* private TCP part */
  55        int                     sk_reclen;      /* length of record */
  56        int                     sk_tcplen;      /* current read length */
  57        time_t                  sk_lastrecv;    /* time of last received request */
  58
  59        /* cache of various info for TCP sockets */
  60        void                    *sk_info_authunix;
  61
  62        struct sockaddr_storage sk_local;       /* local address */
  63        struct sockaddr_storage sk_remote;      /* remote peer's address */
  64        int                     sk_remotelen;   /* length of address */
  65};
  66
  67/*
  68 * Function prototypes.
  69 */
  70int             svc_makesock(struct svc_serv *, int, unsigned short, int flags);
  71void            svc_force_close_socket(struct svc_sock *);
  72int             svc_recv(struct svc_rqst *, long);
  73int             svc_send(struct svc_rqst *);
  74void            svc_drop(struct svc_rqst *);
  75void            svc_sock_update_bufs(struct svc_serv *serv);
  76int             svc_sock_names(char *buf, struct svc_serv *serv, char *toclose);
  77int             svc_addsock(struct svc_serv *serv,
  78                            int fd,
  79                            char *name_return,
  80                            int *proto);
  81
  82/*
  83 * svc_makesock socket characteristics
  84 */
  85#define SVC_SOCK_DEFAULTS       (0U)
  86#define SVC_SOCK_ANONYMOUS      (1U << 0)       /* don't register with pmap */
  87#define SVC_SOCK_TEMPORARY      (1U << 1)       /* flag socket as temporary */
  88
  89#endif /* SUNRPC_SVCSOCK_H */
  90