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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@monad.swb.de>
7 */
8
9#ifndef NFSD_SYSCALL_H
10#define NFSD_SYSCALL_H
11
12#include <asm/types.h>
13#ifdef __KERNEL__
14# include <linux/types.h>
15# include <linux/in.h>
16#endif
17#include <linux/posix_types.h>
18#include <linux/nfsd/const.h>
19#include <linux/nfsd/export.h>
20#include <linux/nfsd/nfsfh.h>
21
22/*
23 * Version of the syscall interface
24 */
25#define NFSCTL_VERSION 0x0201
26
27/*
28 * These are the commands understood by nfsctl().
29 */
30#define NFSCTL_SVC 0 /* This is a server process. */
31#define NFSCTL_ADDCLIENT 1 /* Add an NFS client. */
32#define NFSCTL_DELCLIENT 2 /* Remove an NFS client. */
33#define NFSCTL_EXPORT 3 /* export a file system. */
34#define NFSCTL_UNEXPORT 4 /* unexport a file system. */
35/*#define NFSCTL_UGIDUPDATE 5 / * update a client's uid/gid map. DISCARDED */
36/*#define NFSCTL_GETFH 6 / * get an fh by ino DISCARDED */
37#define NFSCTL_GETFD 7 /* get an fh by path (used by mountd) */
38#define NFSCTL_GETFS 8 /* get an fh by path with max FH len */
39
40/* SVC */
41struct nfsctl_svc {
42 unsigned short svc_port;
43 int svc_nthreads;
44};
45
46/* ADDCLIENT/DELCLIENT */
47struct nfsctl_client {
48 char cl_ident[NFSCLNT_IDMAX+1];
49 int cl_naddr;
50 struct in_addr cl_addrlist[NFSCLNT_ADDRMAX];
51 int cl_fhkeytype;
52 int cl_fhkeylen;
53 unsigned char cl_fhkey[NFSCLNT_KEYMAX];
54};
55
56/* EXPORT/UNEXPORT */
57struct nfsctl_export {
58 char ex_client[NFSCLNT_IDMAX+1];
59 char ex_path[NFS_MAXPATHLEN+1];
60 __kernel_old_dev_t ex_dev;
61 __kernel_ino_t ex_ino;
62 int ex_flags;
63 __kernel_uid_t ex_anon_uid;
64 __kernel_gid_t ex_anon_gid;
65};
66
67/* GETFD */
68struct nfsctl_fdparm {
69 struct sockaddr gd_addr;
70 char gd_path[NFS_MAXPATHLEN+1];
71 int gd_version;
72};
73
74/* GETFS - GET Filehandle with Size */
75struct nfsctl_fsparm {
76 struct sockaddr gd_addr;
77 char gd_path[NFS_MAXPATHLEN+1];
78 int gd_maxlen;
79};
80
81/*
82 * This is the argument union.
83 */
84struct nfsctl_arg {
85 int ca_version; /* safeguard */
86 union {
87 struct nfsctl_svc u_svc;
88 struct nfsctl_client u_client;
89 struct nfsctl_export u_export;
90 struct nfsctl_fdparm u_getfd;
91 struct nfsctl_fsparm u_getfs;
92 /*
93 * The following dummy member is needed to preserve binary compatibility
94 * on platforms where alignof(void*)>alignof(int). It's needed because
95 * this union used to contain a member (u_umap) which contained a
96 * pointer.
97 */
98 void *u_ptr;
99 } u;
100#define ca_svc u.u_svc
101#define ca_client u.u_client
102#define ca_export u.u_export
103#define ca_getfd u.u_getfd
104#define ca_getfs u.u_getfs
105};
106
107union nfsctl_res {
108 __u8 cr_getfh[NFS_FHSIZE];
109 struct knfsd_fh cr_getfs;
110};
111
112#ifdef __KERNEL__
113/*
114 * Kernel syscall implementation.
115 */
116extern int exp_addclient(struct nfsctl_client *ncp);
117extern int exp_delclient(struct nfsctl_client *ncp);
118extern int exp_export(struct nfsctl_export *nxp);
119extern int exp_unexport(struct nfsctl_export *nxp);
120
121#endif /* __KERNEL__ */
122
123#endif /* NFSD_SYSCALL_H */