LXR linux/include/linux/lockd/bind.h

   1/*
   2 * linux/include/linux/lockd/bind.h
   3 *
   4 * This is the part of lockd visible to nfsd and the nfs client.
   5 *
   6 * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
   7 */
   8
   9#ifndef LINUX_LOCKD_BIND_H
  10#define LINUX_LOCKD_BIND_H
  11
  12#include <linux/lockd/nlm.h>
  13/* need xdr-encoded error codes too, so... */
  14#include <linux/lockd/xdr.h>
  15#ifdef CONFIG_LOCKD_V4
  16#include <linux/lockd/xdr4.h>
  17#endif
  18
  19/* Dummy declarations */
  20struct svc_rqst;
  21struct rpc_task;
  22
  23/*
  24 * This is the set of functions for lockd->nfsd communication
  25 */
  26struct nlmsvc_binding {
  27        __be32                  (*fopen)(struct svc_rqst *,
  28                                                struct nfs_fh *,
  29                                                struct file **);
  30        void                    (*fclose)(struct file *);
  31};
  32
  33extern const struct nlmsvc_binding *nlmsvc_ops;
  34
  35/*
  36 * Similar to nfs_client_initdata, but without the NFS-specific
  37 * rpc_ops field.
  38 */
  39struct nlmclnt_initdata {
  40        const char              *hostname;
  41        const struct sockaddr   *address;
  42        size_t                  addrlen;
  43        unsigned short          protocol;
  44        u32                     nfs_version;
  45        int                     noresvport;
  46        struct net              *net;
  47        const struct nlmclnt_operations *nlmclnt_ops;
  48};
  49
  50/*
  51 * Functions exported by the lockd module
  52 */
  53
  54extern struct nlm_host *nlmclnt_init(const struct nlmclnt_initdata *nlm_init);
  55extern void     nlmclnt_done(struct nlm_host *host);
  56
  57/*
  58 * NLM client operations provide a means to modify RPC processing of NLM
  59 * requests.  Callbacks receive a pointer to data passed into the call to
  60 * nlmclnt_proc().
  61 */
  62struct nlmclnt_operations {
  63        /* Called on successful allocation of nlm_rqst, use for allocation or
  64         * reference counting. */
  65        void (*nlmclnt_alloc_call)(void *);
  66
  67        /* Called in rpc_task_prepare for unlock.  A return value of true
  68         * indicates the callback has put the task to sleep on a waitqueue
  69         * and NLM should not call rpc_call_start(). */
  70        bool (*nlmclnt_unlock_prepare)(struct rpc_task*, void *);
  71
  72        /* Called when the nlm_rqst is freed, callbacks should clean up here */
  73        void (*nlmclnt_release_call)(void *);
  74};
  75
  76extern int      nlmclnt_proc(struct nlm_host *host, int cmd, struct file_lock *fl, void *data);
  77extern int      lockd_up(struct net *net);
  78extern void     lockd_down(struct net *net);
  79
  80#endif /* LINUX_LOCKD_BIND_H */
  81