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      1 /*
      2  * include/linux/nfsd/syscall.h
      3  *
      4  * This file holds all declarations for the knfsd syscall interface.
      5  *
      6  * Copyright (C) 1995-1997 Olaf Kirch <okir (at) monad.swb.de>
      7  */
      8 
      9 #ifndef NFSD_SYSCALL_H
     10 #define NFSD_SYSCALL_H
     11 
     12 # include <linux/types.h>
     13 #include <linux/posix_types.h>
     14 #include <linux/nfsd/const.h>
     15 #include <linux/nfsd/export.h>
     16 #include <linux/nfsd/nfsfh.h>
     17 
     18 /*
     19  * Version of the syscall interface
     20  */
     21 #define NFSCTL_VERSION		0x0201
     22 
     23 /*
     24  * These are the commands understood by nfsctl().
     25  */
     26 #define NFSCTL_SVC		0	/* This is a server process. */
     27 #define NFSCTL_ADDCLIENT	1	/* Add an NFS client. */
     28 #define NFSCTL_DELCLIENT	2	/* Remove an NFS client. */
     29 #define NFSCTL_EXPORT		3	/* export a file system. */
     30 #define NFSCTL_UNEXPORT		4	/* unexport a file system. */
     31 /*#define NFSCTL_UGIDUPDATE	5	/ * update a client's uid/gid map. DISCARDED */
     32 /*#define NFSCTL_GETFH		6	/ * get an fh by ino DISCARDED */
     33 #define NFSCTL_GETFD		7	/* get an fh by path (used by mountd) */
     34 #define	NFSCTL_GETFS		8	/* get an fh by path with max FH len */
     35 
     36 /* SVC */
     37 struct nfsctl_svc {
     38 	unsigned short		svc_port;
     39 	int			svc_nthreads;
     40 };
     41 
     42 /* ADDCLIENT/DELCLIENT */
     43 struct nfsctl_client {
     44 	char			cl_ident[NFSCLNT_IDMAX+1];
     45 	int			cl_naddr;
     46 	struct in_addr		cl_addrlist[NFSCLNT_ADDRMAX];
     47 	int			cl_fhkeytype;
     48 	int			cl_fhkeylen;
     49 	unsigned char		cl_fhkey[NFSCLNT_KEYMAX];
     50 };
     51 
     52 /* EXPORT/UNEXPORT */
     53 struct nfsctl_export {
     54 	char			ex_client[NFSCLNT_IDMAX+1];
     55 	char			ex_path[NFS_MAXPATHLEN+1];
     56 	__kernel_old_dev_t	ex_dev;
     57 	__kernel_ino_t		ex_ino;
     58 	int			ex_flags;
     59 	__kernel_uid_t		ex_anon_uid;
     60 	__kernel_gid_t		ex_anon_gid;
     61 };
     62 
     63 /* GETFD */
     64 struct nfsctl_fdparm {
     65 	struct sockaddr		gd_addr;
     66 	char			gd_path[NFS_MAXPATHLEN+1];
     67 	int			gd_version;
     68 };
     69 
     70 /* GETFS - GET Filehandle with Size */
     71 struct nfsctl_fsparm {
     72 	struct sockaddr		gd_addr;
     73 	char			gd_path[NFS_MAXPATHLEN+1];
     74 	int			gd_maxlen;
     75 };
     76 
     77 /*
     78  * This is the argument union.
     79  */
     80 struct nfsctl_arg {
     81 	int			ca_version;	/* safeguard */
     82 	union {
     83 		struct nfsctl_svc	u_svc;
     84 		struct nfsctl_client	u_client;
     85 		struct nfsctl_export	u_export;
     86 		struct nfsctl_fdparm	u_getfd;
     87 		struct nfsctl_fsparm	u_getfs;
     88 		/*
     89 		 * The following dummy member is needed to preserve binary compatibility
     90 		 * on platforms where alignof(void*)>alignof(int).  It's needed because
     91 		 * this union used to contain a member (u_umap) which contained a
     92 		 * pointer.
     93 		 */
     94 		void *u_ptr;
     95 	} u;
     96 #define ca_svc		u.u_svc
     97 #define ca_client	u.u_client
     98 #define ca_export	u.u_export
     99 #define ca_getfd	u.u_getfd
    100 #define	ca_getfs	u.u_getfs
    101 };
    102 
    103 union nfsctl_res {
    104 	__u8			cr_getfh[NFS_FHSIZE];
    105 	struct knfsd_fh		cr_getfs;
    106 };
    107 
    108 
    109 #endif /* NFSD_SYSCALL_H */
    110