/*

 * include/linux/nfsd/syscall.h

 *

 * This file holds all declarations for the knfsd syscall interface.

 *

 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>

 */

#ifndef NFSD_SYSCALL_H

#define NFSD_SYSCALL_H

#ifdef __KERNEL__

# include <linux/in.h>

#endif 

#include <linux/posix_types.h>

#include <linux/nfsd/const.h>

#include <linux/nfsd/export.h>

#include <linux/nfsd/nfsfh.h>

/*

 * Version of the syscall interface

 */

#define NFSCTL_VERSION		0x0201

/*

 * These are the commands understood by nfsctl().

 */

#define NFSCTL_SVC		0	/* This is a server process. */

#define NFSCTL_ADDCLIENT	1	/* Add an NFS client. */

#define NFSCTL_DELCLIENT	2	/* Remove an NFS client. */

#define NFSCTL_EXPORT		3	/* export a file system. */

#define NFSCTL_UNEXPORT		4	/* unexport a file system. */

/*#define NFSCTL_UGIDUPDATE	5	/ * update a client's uid/gid map. DISCARDED */

/*#define NFSCTL_GETFH		6	/ * get an fh by ino DISCARDED */

#define NFSCTL_GETFD		7	/* get an fh by path (used by mountd) */

#define	NFSCTL_GETFS		8	/* get an fh by path with max FH len */

/* SVC */

struct nfsctl_svc {

	unsigned short		svc_port;

	int			svc_nthreads;

};

/* ADDCLIENT/DELCLIENT */

struct nfsctl_client {

	char			cl_ident[NFSCLNT_IDMAX+1];

	int			cl_naddr;

	struct in_addr		cl_addrlist[NFSCLNT_ADDRMAX];

	int			cl_fhkeytype;

	int			cl_fhkeylen;

	unsigned char		cl_fhkey[NFSCLNT_KEYMAX];

};

/* EXPORT/UNEXPORT */

struct nfsctl_export {

	char			ex_client[NFSCLNT_IDMAX+1];

	char			ex_path[NFS_MAXPATHLEN+1];

	__kernel_old_dev_t	ex_dev;

	__kernel_ino_t		ex_ino;

	int			ex_flags;

	__kernel_uid_t		ex_anon_uid;

	__kernel_gid_t		ex_anon_gid;

};

/* GETFD */

struct nfsctl_fdparm {

	struct sockaddr		gd_addr;

	char			gd_path[NFS_MAXPATHLEN+1];

	int			gd_version;

};

/* GETFS - GET Filehandle with Size */

struct nfsctl_fsparm {

	struct sockaddr		gd_addr;

	char			gd_path[NFS_MAXPATHLEN+1];

	int			gd_maxlen;

};

/*

 * This is the argument union.

 */

struct nfsctl_arg {

	int			ca_version;	/* safeguard */

	union {

		struct nfsctl_svc	u_svc;

		struct nfsctl_client	u_client;

		struct nfsctl_export	u_export;

		struct nfsctl_fdparm	u_getfd;

		struct nfsctl_fsparm	u_getfs;

		/*

		 * The following dummy member is needed to preserve binary compatibility

		 * on platforms where alignof(void*)>alignof(int).  It's needed because

		 * this union used to contain a member (u_umap) which contained a

		 * pointer.

		 */

		void *u_ptr;

	} u;

#define ca_svc		u.u_svc

#define ca_client	u.u_client

#define ca_export	u.u_export

#define ca_getfd	u.u_getfd

#define	ca_getfs	u.u_getfs

};

union nfsctl_res {

	__u8			cr_getfh[NFS_FHSIZE];

	struct knfsd_fh		cr_getfs;

};

#ifdef __KERNEL__

/*

 * Kernel syscall implementation.

 */

extern int		exp_addclient(struct nfsctl_client *ncp);

extern int		exp_delclient(struct nfsctl_client *ncp);

extern int		exp_export(struct nfsctl_export *nxp);

extern int		exp_unexport(struct nfsctl_export *nxp);

#endif /* __KERNEL__ */

#endif /* NFSD_SYSCALL_H */