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 #include <linux/sunrpc/svc_xprt.h>
  14
  15 /*
  16  * RPC server socket.
  17  */
  18 struct svc_sock {
  19         struct svc_xprt         sk_xprt;
  20         struct list_head        sk_ready;       /* list of ready sockets */
  21         struct list_head        sk_list;        /* list of all sockets */
  22         struct socket *         sk_sock;        /* berkeley socket layer */
  23         struct sock *           sk_sk;          /* INET layer */
  24
  25         struct svc_pool *       sk_pool;        /* current pool iff queued */
  26         struct svc_serv *       sk_server;      /* service for this socket */
  27         atomic_t                sk_inuse;       /* use count */
  28         unsigned long           sk_flags;
  29 #define SK_BUSY         0                       /* enqueued/receiving */
  30 #define SK_CONN         1                       /* conn pending */
  31 #define SK_CLOSE        2                       /* dead or dying */
  32 #define SK_DATA         3                       /* data pending */
  33 #define SK_TEMP         4                       /* temp (TCP) socket */
  34 #define SK_DEAD         6                       /* socket closed */
  35 #define SK_CHNGBUF      7                       /* need to change snd/rcv buffer sizes */
  36 #define SK_DEFERRED     8                       /* request on sk_deferred */
  37 #define SK_OLD          9                       /* used for temp socket aging mark+sweep */
  38 #define SK_DETACHED     10                      /* detached from tempsocks list */
  39
  40         atomic_t                sk_reserved;    /* space on outq that is reserved */
  41
  42         spinlock_t              sk_lock;        /* protects sk_deferred and
  43                                                  * sk_info_authunix */
  44         struct list_head        sk_deferred;    /* deferred requests that need to
  45                                                  * be revisted */
  46         struct mutex            sk_mutex;       /* to serialize sending data */
  47
  48         int                     (*sk_recvfrom)(struct svc_rqst *rqstp);
  49         int                     (*sk_sendto)(struct svc_rqst *rqstp);
  50
  51         /* We keep the old state_change and data_ready CB's here */
  52         void                    (*sk_ostate)(struct sock *);
  53         void                    (*sk_odata)(struct sock *, int bytes);
  54         void                    (*sk_owspace)(struct sock *);
  55
  56         /* private TCP part */
  57         int                     sk_reclen;      /* length of record */
  58         int                     sk_tcplen;      /* current read length */
  59         time_t                  sk_lastrecv;    /* time of last received request */
  60
  61         /* cache of various info for TCP sockets */
  62         void                    *sk_info_authunix;
  63
  64         struct sockaddr_storage sk_local;       /* local address */
  65         struct sockaddr_storage sk_remote;      /* remote peer's address */
  66         int                     sk_remotelen;   /* length of address */
  67 };
  68
  69 /*
  70  * Function prototypes.
  71  */
  72 int             svc_makesock(struct svc_serv *, int, unsigned short, int flags);
  73 void            svc_force_close_socket(struct svc_sock *);
  74 int             svc_recv(struct svc_rqst *, long);
  75 int             svc_send(struct svc_rqst *);
  76 void            svc_drop(struct svc_rqst *);
  77 void            svc_sock_update_bufs(struct svc_serv *serv);
  78 int             svc_sock_names(char *buf, struct svc_serv *serv, char *toclose);
  79 int             svc_addsock(struct svc_serv *serv,
  80                             int fd,
  81                             char *name_return,
  82                             int *proto);
  83 void            svc_init_xprt_sock(void);
  84 void            svc_cleanup_xprt_sock(void);
  85
  86 /*
  87  * svc_makesock socket characteristics
  88  */
  89 #define SVC_SOCK_DEFAULTS       (0U)
  90 #define SVC_SOCK_ANONYMOUS      (1U << 0)       /* don't register with pmap */
  91 #define SVC_SOCK_TEMPORARY      (1U << 1)       /* flag socket as temporary */
  92
  93 #endif /* SUNRPC_SVCSOCK_H */