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  */
  17 struct 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_remote;      /* remote peer's address */
  63         int                     sk_remotelen;   /* length of address */
  64 };
  65
  66 /*
  67  * Function prototypes.
  68  */
  69 int             svc_makesock(struct svc_serv *, int, unsigned short, int flags);
  70 void            svc_force_close_socket(struct svc_sock *);
  71 int             svc_recv(struct svc_rqst *, long);
  72 int             svc_send(struct svc_rqst *);
  73 void            svc_drop(struct svc_rqst *);
  74 void            svc_sock_update_bufs(struct svc_serv *serv);
  75 int             svc_sock_names(char *buf, struct svc_serv *serv, char *toclose);
  76 int             svc_addsock(struct svc_serv *serv,
  77                             int fd,
  78                             char *name_return,
  79                             int *proto);
  80
  81 /*
  82  * svc_makesock socket characteristics
  83  */
  84 #define SVC_SOCK_DEFAULTS       (0U)
  85 #define SVC_SOCK_ANONYMOUS      (1U << 0)       /* don't register with pmap */
  86 #define SVC_SOCK_TEMPORARY      (1U << 1)       /* flag socket as temporary */
  87
  88 #endif /* SUNRPC_SVCSOCK_H */