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/*
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 * include/linux/nfsd/syscall.h
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 *
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 * This file holds all declarations for the knfsd syscall interface.
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 *
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 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
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 */
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#ifndef NFSD_SYSCALL_H
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#define NFSD_SYSCALL_H
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#include <asm/types.h>
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#ifdef __KERNEL__
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# include <linux/config.h>
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# include <linux/types.h>
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# include <linux/in.h>
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#endif 
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#include <linux/posix_types.h>
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#include <linux/nfsd/const.h>
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#include <linux/nfsd/export.h>
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#include <linux/nfsd/nfsfh.h>
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#include <linux/nfsd/auth.h>
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/*
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 * Version of the syscall interface
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 */
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#define NFSCTL_VERSION          0x0201
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/*
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 * These are the commands understood by nfsctl().
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 */
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#define NFSCTL_SVC              0       /* This is a server process. */
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#define NFSCTL_ADDCLIENT        1       /* Add an NFS client. */
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#define NFSCTL_DELCLIENT        2       /* Remove an NFS client. */
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#define NFSCTL_EXPORT           3       /* export a file system. */
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#define NFSCTL_UNEXPORT         4       /* unexport a file system. */
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/*#define NFSCTL_UGIDUPDATE     5       / * update a client's uid/gid map. DISCARDED */
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/*#define NFSCTL_GETFH          6       / * get an fh by ino DISCARDED */
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#define NFSCTL_GETFD            7       /* get an fh by path (used by mountd) */
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#define NFSCTL_GETFS            8       /* get an fh by path with max FH len */
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/* SVC */
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struct nfsctl_svc {
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        unsigned short          svc_port;
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        int                     svc_nthreads;
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};
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/* ADDCLIENT/DELCLIENT */
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struct nfsctl_client {
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        char                    cl_ident[NFSCLNT_IDMAX+1];
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        int                     cl_naddr;
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        struct in_addr          cl_addrlist[NFSCLNT_ADDRMAX];
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        int                     cl_fhkeytype;
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        int                     cl_fhkeylen;
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        unsigned char           cl_fhkey[NFSCLNT_KEYMAX];
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};
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/* EXPORT/UNEXPORT */
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struct nfsctl_export {
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        char                    ex_client[NFSCLNT_IDMAX+1];
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        char                    ex_path[NFS_MAXPATHLEN+1];
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        __kernel_old_dev_t      ex_dev;
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        __kernel_ino_t          ex_ino;
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        int                     ex_flags;
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        __kernel_uid_t          ex_anon_uid;
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        __kernel_gid_t          ex_anon_gid;
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};
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/* GETFD */
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struct nfsctl_fdparm {
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        struct sockaddr         gd_addr;
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        char                    gd_path[NFS_MAXPATHLEN+1];
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        int                     gd_version;
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};
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/* GETFS - GET Filehandle with Size */
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struct nfsctl_fsparm {
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        struct sockaddr         gd_addr;
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        char                    gd_path[NFS_MAXPATHLEN+1];
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        int                     gd_maxlen;
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};
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/*
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 * This is the argument union.
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 */
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struct nfsctl_arg {
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        int                     ca_version;     /* safeguard */
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        union {
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                struct nfsctl_svc       u_svc;
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                struct nfsctl_client    u_client;
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                struct nfsctl_export    u_export;
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                struct nfsctl_fdparm    u_getfd;
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                struct nfsctl_fsparm    u_getfs;
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                /*
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                 * The following dummy member is needed to preserve binary compatibility
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                 * on platforms where alignof(void*)>alignof(int).  It's needed because
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                 * this union used to contain a member (u_umap) which contained a
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                 * pointer.
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                 */
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                void *u_ptr;
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        } u;
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#define ca_svc          u.u_svc
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#define ca_client       u.u_client
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#define ca_export       u.u_export
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#define ca_getfd        u.u_getfd
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#define ca_getfs        u.u_getfs
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};
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union nfsctl_res {
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        __u8                    cr_getfh[NFS_FHSIZE];
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        struct knfsd_fh         cr_getfs;
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};
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#ifdef __KERNEL__
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/*
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 * Kernel syscall implementation.
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 */
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extern asmlinkage long  sys_nfsservctl(int, struct nfsctl_arg __user *, void __user *);
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extern int              exp_addclient(struct nfsctl_client *ncp);
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extern int              exp_delclient(struct nfsctl_client *ncp);
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extern int              exp_export(struct nfsctl_export *nxp);
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extern int              exp_unexport(struct nfsctl_export *nxp);
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#endif /* __KERNEL__ */
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#endif /* NFSD_SYSCALL_H */