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 */
  20 struct svc_rqst;
  21 struct rpc_task;
  22
  23 /*
  24  * This is the set of functions for lockd->nfsd communication
  25  */
  26 struct nlmsvc_binding {
  27         __be32                  (*fopen)(struct svc_rqst *,
  28                                                 struct nfs_fh *,
  29                                                 struct file **);
  30         void                    (*fclose)(struct file *);
  31 };
  32
  33 extern const struct nlmsvc_binding *nlmsvc_ops;
  34
  35 /*
  36  * Similar to nfs_client_initdata, but without the NFS-specific
  37  * rpc_ops field.
  38  */
  39 struct 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
  54 extern struct nlm_host *nlmclnt_init(const struct nlmclnt_initdata *nlm_init);
  55 extern 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  */
  62 struct 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
  76 extern int      nlmclnt_proc(struct nlm_host *host, int cmd, struct file_lock *fl, void *data);
  77 extern int      lockd_up(struct net *net);
  78 extern void     lockd_down(struct net *net);
  79
  80 #endif /* LINUX_LOCKD_BIND_H */