1/*
2 * include/linux/nfsd/export.h
3 *
4 * Public declarations for NFS exports. The definitions for the
5 * syscall interface are in nfsctl.h
6 *
7 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
8 */
9
10#ifndef NFSD_EXPORT_H
11#define NFSD_EXPORT_H
12
13#include <asm/types.h>
14#ifdef __KERNEL__
15# include <linux/types.h>
16# include <linux/in.h>
17#endif
18
19/*
20 * Important limits for the exports stuff.
21 */
22#define NFSCLNT_IDMAX		1024
23#define NFSCLNT_ADDRMAX		16
24#define NFSCLNT_KEYMAX		32
25
26/*
27 * Export flags.
28 */
29#define NFSEXP_READONLY		0x0001
30#define NFSEXP_INSECURE_PORT	0x0002
31#define NFSEXP_ROOTSQUASH	0x0004
32#define NFSEXP_ALLSQUASH	0x0008
33#define NFSEXP_ASYNC		0x0010
34#define NFSEXP_GATHERED_WRITES	0x0020
35#define NFSEXP_UIDMAP		0x0040
36#define NFSEXP_KERBEROS		0x0080		/* not available */
37#define NFSEXP_SUNSECURE	0x0100
38#define NFSEXP_CROSSMNT		0x0200
39#define NFSEXP_NOSUBTREECHECK	0x0400
40#define	NFSEXP_NOAUTHNLM	0x0800		/* Don't authenticate NLM requests - just trust */
41#define NFSEXP_MSNFS		0x1000	/* do silly things that MS clients expect */
42#define NFSEXP_FSID		0x2000
43#define NFSEXP_ALLFLAGS		0x3FFF
44
45
46#ifdef __KERNEL__
47
48/* The following are hashtable sizes and must be powers of 2 */
49#define NFSCLNT_EXPMAX		16
50
51struct svc_client {
52	struct svc_client *	cl_next;
53	char			cl_ident[NFSCLNT_IDMAX];
54	int			cl_idlen;
55	int			cl_naddr;
56	struct in_addr		cl_addr[NFSCLNT_ADDRMAX];
57	struct svc_uidmap *	cl_umap;
58	struct list_head	cl_export[NFSCLNT_EXPMAX];
59	struct list_head	cl_expfsid[NFSCLNT_EXPMAX];
60	struct list_head	cl_list;
61};
62
63struct svc_export {
64	struct list_head	ex_hash;
65	struct list_head	ex_fsid_hash;
66	struct list_head	ex_list;
67	char			ex_path[NFS_MAXPATHLEN+1];
68	struct svc_export *	ex_parent;
69	struct svc_client *	ex_client;
70	int			ex_flags;
71	struct vfsmount *	ex_mnt;
72	struct dentry *		ex_dentry;
73	kdev_t			ex_dev;
74	ino_t			ex_ino;
75	uid_t			ex_anon_uid;
76	gid_t			ex_anon_gid;
77	int			ex_fsid;
78};
79
80#define EX_SECURE(exp)		(!((exp)->ex_flags & NFSEXP_INSECURE_PORT))
81#define EX_ISSYNC(exp)		(!((exp)->ex_flags & NFSEXP_ASYNC))
82#define EX_RDONLY(exp)		((exp)->ex_flags & NFSEXP_READONLY)
83#define EX_CROSSMNT(exp)	((exp)->ex_flags & NFSEXP_CROSSMNT)
84#define EX_SUNSECURE(exp)	((exp)->ex_flags & NFSEXP_SUNSECURE)
85#define EX_WGATHER(exp)		((exp)->ex_flags & NFSEXP_GATHERED_WRITES)
86
87
88/*
89 * Function declarations
90 */
91void			nfsd_export_init(void);
92void			nfsd_export_shutdown(void);
93void			exp_readlock(void);
94int			exp_writelock(void);
95void			exp_unlock(void);
96struct svc_client *	exp_getclient(struct sockaddr_in *sin);
97void			exp_putclient(struct svc_client *clp);
98struct svc_export *	exp_get(struct svc_client *clp, kdev_t dev, ino_t ino);
99struct svc_export *	exp_get_fsid(struct svc_client *clp, int fsid);
100int			exp_rootfh(struct svc_client *, kdev_t, ino_t,
101					char *path, struct knfsd_fh *, int maxsize);
102int			nfserrno(int errno);
103void			exp_nlmdetach(void);
104
105
106#endif /* __KERNEL__ */
107
108#endif /* NFSD_EXPORT_H */
109
110