LXR linux/include/uapi/linux/nfsd/export.h

   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/* 80 100 currently unused */
  36#define NFSEXP_NOHIDE           0x0200
  37#define NFSEXP_NOSUBTREECHECK   0x0400
  38#define NFSEXP_NOAUTHNLM        0x0800          /* Don't authenticate NLM requests - just trust */
  39#define NFSEXP_MSNFS            0x1000  /* do silly things that MS clients expect; no longer supported */
  40#define NFSEXP_FSID             0x2000
  41#define NFSEXP_CROSSMOUNT       0x4000
  42#define NFSEXP_NOACL            0x8000  /* reserved for possible ACL related use */
  43/*
  44 * The NFSEXP_V4ROOT flag causes the kernel to give access only to NFSv4
  45 * clients, and only to the single directory that is the root of the
  46 * export; further lookup and readdir operations are treated as if every
  47 * subdirectory was a mountpoint, and ignored if they are not themselves
  48 * exported.  This is used by nfsd and mountd to construct the NFSv4
  49 * pseudofilesystem, which provides access only to paths leading to each
  50 * exported filesystem.
  51 */
  52#define NFSEXP_V4ROOT           0x10000
  53#define NFSEXP_PNFS             0x20000
  54
  55/* All flags that we claim to support.  (Note we don't support NOACL.) */
  56#define NFSEXP_ALLFLAGS         0x3FE7F
  57
  58/* The flags that may vary depending on security flavor: */
  59#define NFSEXP_SECINFO_FLAGS    (NFSEXP_READONLY | NFSEXP_ROOTSQUASH \
  60                                        | NFSEXP_ALLSQUASH \
  61                                        | NFSEXP_INSECURE_PORT)
  62
  63
  64#endif /* _UAPINFSD_EXPORT_H */
  65