include/linux/sunrpc/svc_xprt.h

   1 /*
   2  * linux/include/linux/sunrpc/svc_xprt.h
   3  *
   4  * RPC server transport I/O
   5  */
   6
   7 #ifndef SUNRPC_SVC_XPRT_H
   8 #define SUNRPC_SVC_XPRT_H
   9
  10 #include <linux/sunrpc/svc.h>
  11 #include <linux/module.h>
  12
  13 struct svc_xprt_ops {
  14         struct svc_xprt *(*xpo_create)(struct svc_serv *,
  15                                        struct sockaddr *, int,
  16                                        int);
  17         struct svc_xprt *(*xpo_accept)(struct svc_xprt *);
  18         int             (*xpo_has_wspace)(struct svc_xprt *);
  19         int             (*xpo_recvfrom)(struct svc_rqst *);
  20         void            (*xpo_prep_reply_hdr)(struct svc_rqst *);
  21         int             (*xpo_sendto)(struct svc_rqst *);
  22         void            (*xpo_release_rqst)(struct svc_rqst *);
  23         void            (*xpo_detach)(struct svc_xprt *);
  24         void            (*xpo_free)(struct svc_xprt *);
  25 };
  26
  27 struct svc_xprt_class {
  28         const char              *xcl_name;
  29         struct module           *xcl_owner;
  30         struct svc_xprt_ops     *xcl_ops;
  31         struct list_head        xcl_list;
  32         u32                     xcl_max_payload;
  33 };
  34
  35 struct svc_xprt {
  36         struct svc_xprt_class   *xpt_class;
  37         struct svc_xprt_ops     *xpt_ops;
  38         struct kref             xpt_ref;
  39         struct list_head        xpt_list;
  40         struct list_head        xpt_ready;
  41         unsigned long           xpt_flags;
  42 #define XPT_BUSY        0               /* enqueued/receiving */
  43 #define XPT_CONN        1               /* conn pending */
  44 #define XPT_CLOSE       2               /* dead or dying */
  45 #define XPT_DATA        3               /* data pending */
  46 #define XPT_TEMP        4               /* connected transport */
  47 #define XPT_DEAD        6               /* transport closed */
  48 #define XPT_CHNGBUF     7               /* need to change snd/rcv buf sizes */
  49 #define XPT_DEFERRED    8               /* deferred request pending */
  50 #define XPT_OLD         9               /* used for xprt aging mark+sweep */
  51 #define XPT_DETACHED    10              /* detached from tempsocks list */
  52 #define XPT_LISTENER    11              /* listening endpoint */
  53 #define XPT_CACHE_AUTH  12              /* cache auth info */
  54
  55         struct svc_pool         *xpt_pool;      /* current pool iff queued */
  56         struct svc_serv         *xpt_server;    /* service for transport */
  57         atomic_t                xpt_reserved;   /* space on outq that is rsvd */
  58         struct mutex            xpt_mutex;      /* to serialize sending data */
  59         spinlock_t              xpt_lock;       /* protects sk_deferred
  60                                                  * and xpt_auth_cache */
  61         void                    *xpt_auth_cache;/* auth cache */
  62         struct list_head        xpt_deferred;   /* deferred requests that need
  63                                                  * to be revisted */
  64 };
  65
  66 int     svc_reg_xprt_class(struct svc_xprt_class *);
  67 void    svc_unreg_xprt_class(struct svc_xprt_class *);
  68 void    svc_xprt_init(struct svc_xprt_class *, struct svc_xprt *,
  69                       struct svc_serv *);
  70 int     svc_create_xprt(struct svc_serv *, char *, unsigned short, int);
  71 void    svc_xprt_received(struct svc_xprt *);
  72 void    svc_xprt_put(struct svc_xprt *xprt);
  73 static inline void svc_xprt_get(struct svc_xprt *xprt)
  74 {
  75         kref_get(&xprt->xpt_ref);
  76 }
  77
  78 #endif /* SUNRPC_SVC_XPRT_H */