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/*

 * 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

#include <asm/types.h>

#ifdef __KERNEL__

# include <linux/types.h>

# 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>

#include <linux/nfsd/auth.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 */