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 */