[mirror_ubuntu-bionic-kernel.git] / include / linux / lockd / bind.h

/* 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;
};

/*
 * 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);
extern void	lockd_down(struct net *net);

#endif /* LINUX_LOCKD_BIND_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	2	/*
	3	* linux/include/linux/lockd/bind.h
	4	*
	5	* This is the part of lockd visible to nfsd and the nfs client.
	6	*
	7	* Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
	8	*/
	9
	10	#ifndef LINUX_LOCKD_BIND_H
	11	#define LINUX_LOCKD_BIND_H
	12
	13	#include <linux/lockd/nlm.h>
d343fce1 N	14	/* need xdr-encoded error codes too, so... */
	15	#include <linux/lockd/xdr.h>
	16	#ifdef CONFIG_LOCKD_V4
	17	#include <linux/lockd/xdr4.h>
	18	#endif
1da177e4 LT	19
	20	/* Dummy declarations */
	21	struct svc_rqst;
b1ece737	22	struct rpc_task;
1da177e4 LT	23
	24	/*
	25	* This is the set of functions for lockd->nfsd communication
	26	*/
	27	struct nlmsvc_binding {
e8c5c045	28	__be32 (fopen)(struct svc_rqst ,
1da177e4 LT	29	struct nfs_fh *,
	30	struct file **);
	31	void (fclose)(struct file );
	32	};
	33
2a297450	34	extern const struct nlmsvc_binding *nlmsvc_ops;
1da177e4	35
883bb163 CL	36	/*
	37	* Similar to nfs_client_initdata, but without the NFS-specific
	38	* rpc_ops field.
	39	*/
	40	struct nlmclnt_initdata {
	41	const char *hostname;
	42	const struct sockaddr *address;
	43	size_t addrlen;
	44	unsigned short protocol;
	45	u32 nfs_version;
0cb2659b	46	int noresvport;
66697bfd	47	struct net *net;
b1ece737	48	const struct nlmclnt_operations *nlmclnt_ops;
883bb163 CL	49	};
883bb163 CL	50
1da177e4 LT	51	/*
	52	* Functions exported by the lockd module
	53	*/
883bb163 CL	54
883bb163 CL	55	extern struct nlm_host nlmclnt_init(const struct nlmclnt_initdata nlm_init);
52c4044d CL	56	extern void nlmclnt_done(struct nlm_host *host);
52c4044d CL	57
b1ece737 BC	58	/*
	59	* NLM client operations provide a means to modify RPC processing of NLM
	60	* requests. Callbacks receive a pointer to data passed into the call to
	61	* nlmclnt_proc().
	62	*/
	63	struct nlmclnt_operations {
	64	/* Called on successful allocation of nlm_rqst, use for allocation or
	65	* reference counting. */
	66	void (nlmclnt_alloc_call)(void );
	67
	68	/* Called in rpc_task_prepare for unlock. A return value of true
	69	* indicates the callback has put the task to sleep on a waitqueue
	70	* and NLM should not call rpc_call_start(). */
	71	bool (nlmclnt_unlock_prepare)(struct rpc_task, void *);
	72
	73	/* Called when the nlm_rqst is freed, callbacks should clean up here */
	74	void (nlmclnt_release_call)(void );
	75	};
	76
	77	extern int nlmclnt_proc(struct nlm_host host, int cmd, struct file_lock fl, void *data);
e3f70ead SK	78	extern int lockd_up(struct net *net);
e3f70ead SK	79	extern void lockd_down(struct net *net);
1da177e4 LT	80
1da177e4 LT	81	#endif /* LINUX_LOCKD_BIND_H */