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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 _UAPINFSD_EXPORT_H
11#define _UAPINFSD_EXPORT_H
12
13# include <linux/types.h>
14
15/*
16 * Important limits for the exports stuff.
17 */
18#define NFSCLNT_IDMAX 1024
19#define NFSCLNT_ADDRMAX 16
20#define NFSCLNT_KEYMAX 32
21
22/*
23 * Export flags.
24 *
25 * Please update the expflags[] array in fs/nfsd/export.c when adding
26 * a new flag.
27 */
28#define NFSEXP_READONLY 0x0001
29#define NFSEXP_INSECURE_PORT 0x0002
30#define NFSEXP_ROOTSQUASH 0x0004
31#define NFSEXP_ALLSQUASH 0x0008
32#define NFSEXP_ASYNC 0x0010
33#define NFSEXP_GATHERED_WRITES 0x0020
34#define NFSEXP_NOREADDIRPLUS 0x0040
35#define NFSEXP_SECURITY_LABEL 0x0080
36/* 0x100 currently unused */
37#define NFSEXP_NOHIDE 0x0200
38#define NFSEXP_NOSUBTREECHECK 0x0400
39#define NFSEXP_NOAUTHNLM 0x0800 /* Don't authenticate NLM requests - just trust */
40#define NFSEXP_MSNFS 0x1000 /* do silly things that MS clients expect; no longer supported */
41#define NFSEXP_FSID 0x2000
42#define NFSEXP_CROSSMOUNT 0x4000
43#define NFSEXP_NOACL 0x8000 /* reserved for possible ACL related use */
44/*
45 * The NFSEXP_V4ROOT flag causes the kernel to give access only to NFSv4
46 * clients, and only to the single directory that is the root of the
47 * export; further lookup and readdir operations are treated as if every
48 * subdirectory was a mountpoint, and ignored if they are not themselves
49 * exported. This is used by nfsd and mountd to construct the NFSv4
50 * pseudofilesystem, which provides access only to paths leading to each
51 * exported filesystem.
52 */
53#define NFSEXP_V4ROOT 0x10000
54#define NFSEXP_PNFS 0x20000
55
56/* All flags that we claim to support. (Note we don't support NOACL.) */
57#define NFSEXP_ALLFLAGS 0x3FEFF
58
59/* The flags that may vary depending on security flavor: */
60#define NFSEXP_SECINFO_FLAGS (NFSEXP_READONLY | NFSEXP_ROOTSQUASH \
61 | NFSEXP_ALLSQUASH \
62 | NFSEXP_INSECURE_PORT)
63
64
65#endif /* _UAPINFSD_EXPORT_H */