2 * include/linux/nfsd/export.h
4 * Public declarations for NFS exports. The definitions for the
5 * syscall interface are in nfsctl.h
7 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
10 #ifndef _UAPINFSD_EXPORT_H
11 #define _UAPINFSD_EXPORT_H
13 # include <linux/types.h>
16 * Important limits for the exports stuff.
18 #define NFSCLNT_IDMAX 1024
19 #define NFSCLNT_ADDRMAX 16
20 #define NFSCLNT_KEYMAX 32
25 * Please update the expflags[] array in fs/nfsd/export.c when adding
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 */
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.
53 #define NFSEXP_V4ROOT 0x10000
54 #define NFSEXP_PNFS 0x20000
56 /* All flags that we claim to support. (Note we don't support NOACL.) */
57 #define NFSEXP_ALLFLAGS 0x3FEFF
59 /* The flags that may vary depending on security flavor: */
60 #define NFSEXP_SECINFO_FLAGS (NFSEXP_READONLY | NFSEXP_ROOTSQUASH \
62 | NFSEXP_INSECURE_PORT)
65 #endif /* _UAPINFSD_EXPORT_H */