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/* SPDX-License-Identifier: GPL-2.0 */
/*
* linux/include/linux/lockd/bind.h
*
* This is the part of lockd visible to nfsd and the nfs client.
*
* Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
*/
#ifndef LINUX_LOCKD_BIND_H
#define LINUX_LOCKD_BIND_H
#include <linux/lockd/nlm.h>
/* need xdr-encoded error codes too, so... */
#include <linux/lockd/xdr.h>
#ifdef CONFIG_LOCKD_V4
#include <linux/lockd/xdr4.h>
#endif
/* Dummy declarations */
struct svc_rqst;
struct rpc_task;
/*
* This is the set of functions for lockd->nfsd communication
*/
struct nlmsvc_binding {
__be32 (*fopen)(struct svc_rqst *,
struct nfs_fh *,
struct file **);
void (*fclose)(struct file *);
};
extern const struct nlmsvc_binding *nlmsvc_ops;
/*
* Similar to nfs_client_initdata, but without the NFS-specific
* rpc_ops field.
*/
struct nlmclnt_initdata {
const char *hostname;
const struct sockaddr *address;
size_t addrlen;
unsigned short protocol;
u32 nfs_version;
int noresvport;
struct net *net;
const struct nlmclnt_operations *nlmclnt_ops;
const struct cred *cred;
};
/*
* Functions exported by the lockd module
*/
extern struct nlm_host *nlmclnt_init(const struct nlmclnt_initdata *nlm_init);
extern void nlmclnt_done(struct nlm_host *host);
/*
* NLM client operations provide a means to modify RPC processing of NLM
* requests. Callbacks receive a pointer to data passed into the call to
* nlmclnt_proc().
*/
struct nlmclnt_operations {
/* Called on successful allocation of nlm_rqst, use for allocation or
* reference counting. */
void (*nlmclnt_alloc_call)(void *);
/* Called in rpc_task_prepare for unlock. A return value of true
* indicates the callback has put the task to sleep on a waitqueue
* and NLM should not call rpc_call_start(). */
bool (*nlmclnt_unlock_prepare)(struct rpc_task*, void *);
/* Called when the nlm_rqst is freed, callbacks should clean up here */
void (*nlmclnt_release_call)(void *);
};
extern int nlmclnt_proc(struct nlm_host *host, int cmd, struct file_lock *fl, void *data);
extern int lockd_up(struct net *net, const struct cred *cred);
extern void lockd_down(struct net *net);
#endif /* LINUX_LOCKD_BIND_H */
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