/*
   * NFS protocol definitions
   *
   * This file contains constants mostly for Version 2 of the protocol,
   * but also has a couple of NFSv3 bits in (notably the error codes).
   */
  #ifndef _LINUX_NFS_H
  #define _LINUX_NFS_H

  #define NFS_PROGRAM	100003
  #define NFS_PORT	2049
  #define NFS_MAXDATA	8192
  #define NFS_MAXPATHLEN	1024
  #define NFS_MAXNAMLEN	255
  #define NFS_MAXGROUPS	16
  #define NFS_FHSIZE	32
  #define NFS_COOKIESIZE	4
  #define NFS_FIFO_DEV	(-1)
  #define NFSMODE_FMT	0170000
  #define NFSMODE_DIR	0040000
  #define NFSMODE_CHR	0020000
  #define NFSMODE_BLK	0060000
  #define NFSMODE_REG	0100000
  #define NFSMODE_LNK	0120000
  #define NFSMODE_SOCK	0140000
  #define NFSMODE_FIFO	0010000

  #define NFS_MNT_PROGRAM		100005
  #define NFS_MNT_VERSION		1
  #define NFS_MNT3_VERSION	3

  #define NFS_PIPE_DIRNAME "/nfs"

  /*
   * NFS stats. The good thing with these values is that NFSv3 errors are
   * a superset of NFSv2 errors (with the exception of NFSERR_WFLUSH which
   * no-one uses anyway), so we can happily mix code as long as we make sure
   * no NFSv3 errors are returned to NFSv2 clients.
   * Error codes that have a `--' in the v2 column are not part of the
   * standard, but seem to be widely used nevertheless.
   */
   enum nfs_stat {
  	NFS_OK = 0,			/* v2 v3 v4 */
  	NFSERR_PERM = 1,		/* v2 v3 v4 */
  	NFSERR_NOENT = 2,		/* v2 v3 v4 */
  	NFSERR_IO = 5,			/* v2 v3 v4 */
  	NFSERR_NXIO = 6,		/* v2 v3 v4 */
  	NFSERR_EAGAIN = 11,		/* v2 v3 */
  	NFSERR_ACCES = 13,		/* v2 v3 v4 */
  	NFSERR_EXIST = 17,		/* v2 v3 v4 */
  	NFSERR_XDEV = 18,		/*    v3 v4 */
  	NFSERR_NODEV = 19,		/* v2 v3 v4 */
  	NFSERR_NOTDIR = 20,		/* v2 v3 v4 */
  	NFSERR_ISDIR = 21,		/* v2 v3 v4 */
  	NFSERR_INVAL = 22,		/* v2 v3 v4 */
  	NFSERR_FBIG = 27,		/* v2 v3 v4 */
  	NFSERR_NOSPC = 28,		/* v2 v3 v4 */
  	NFSERR_ROFS = 30,		/* v2 v3 v4 */
  	NFSERR_MLINK = 31,		/*    v3 v4 */
  	NFSERR_OPNOTSUPP = 45,		/* v2 v3 */
  	NFSERR_NAMETOOLONG = 63,	/* v2 v3 v4 */
  	NFSERR_NOTEMPTY = 66,		/* v2 v3 v4 */
  	NFSERR_DQUOT = 69,		/* v2 v3 v4 */
  	NFSERR_STALE = 70,		/* v2 v3 v4 */
  	NFSERR_REMOTE = 71,		/* v2 v3 */
  	NFSERR_WFLUSH = 99,		/* v2    */
  	NFSERR_BADHANDLE = 10001,	/*    v3 v4 */
  	NFSERR_NOT_SYNC = 10002,	/*    v3 */
  	NFSERR_BAD_COOKIE = 10003,	/*    v3 v4 */
  	NFSERR_NOTSUPP = 10004,		/*    v3 v4 */
  	NFSERR_TOOSMALL = 10005,	/*    v3 v4 */
  	NFSERR_SERVERFAULT = 10006,	/*    v3 v4 */
  	NFSERR_BADTYPE = 10007,		/*    v3 v4 */
  	NFSERR_JUKEBOX = 10008,		/*    v3 v4 */
  	NFSERR_SAME = 10009,		/*       v4 */
  	NFSERR_DENIED = 10010,		/*       v4 */
  	NFSERR_EXPIRED = 10011,		/*       v4 */
  	NFSERR_LOCKED = 10012,		/*       v4 */
  	NFSERR_GRACE = 10013,		/*       v4 */
  	NFSERR_FHEXPIRED = 10014,	/*       v4 */
  	NFSERR_SHARE_DENIED = 10015,	/*       v4 */
  	NFSERR_WRONGSEC = 10016,	/*       v4 */
  	NFSERR_CLID_INUSE = 10017,	/*       v4 */
  	NFSERR_RESOURCE = 10018,	/*       v4 */
  	NFSERR_MOVED = 10019,		/*       v4 */
  	NFSERR_NOFILEHANDLE = 10020,	/*       v4 */
  	NFSERR_MINOR_VERS_MISMATCH = 10021,   /* v4 */
  	NFSERR_STALE_CLIENTID = 10022,	/*       v4 */
  	NFSERR_STALE_STATEID = 10023,   /*       v4 */
  	NFSERR_OLD_STATEID = 10024,     /*       v4 */
  	NFSERR_BAD_STATEID = 10025,     /*       v4 */  
  	NFSERR_BAD_SEQID = 10026,	/*       v4 */
  	NFSERR_NOT_SAME = 10027,	/*       v4 */
  	NFSERR_LOCK_RANGE = 10028,	/*       v4 */
  	NFSERR_SYMLINK = 10029,		/*       v4 */
  	NFSERR_RESTOREFH = 10030,	/*       v4 */
  	NFSERR_LEASE_MOVED = 10031,	/*       v4 */
  	NFSERR_ATTRNOTSUPP = 10032,	/*       v4 */
  	NFSERR_NO_GRACE = 10033,	/*       v4 */
  	NFSERR_RECLAIM_BAD = 10034,	/*       v4 */
  	NFSERR_RECLAIM_CONFLICT = 10035,/*       v4 */
  	NFSERR_BAD_XDR = 10036,		/*       v4 */
  	NFSERR_LOCKS_HELD = 10037,	/*       v4 */
  	NFSERR_OPENMODE = 10038,       /*       v4 */
  	NFSERR_BADOWNER = 10039,       /*       v4 */
  	NFSERR_BADCHAR = 10040,        /*       v4 */
  	NFSERR_BADNAME = 10041,        /*       v4 */
  	NFSERR_BAD_RANGE = 10042,      /*       v4 */
  	NFSERR_LOCK_NOTSUPP = 10043,   /*       v4 */
  	NFSERR_OP_ILLEGAL = 10044,     /*       v4 */
  	NFSERR_DEADLOCK = 10045,       /*       v4 */
  	NFSERR_FILE_OPEN = 10046,      /*       v4 */
  	NFSERR_ADMIN_REVOKED = 10047,  /*       v4 */
  	NFSERR_CB_PATH_DOWN = 10048,   /*       v4 */

  };
  
  /* NFSv2 file types - beware, these are not the same in NFSv3 */
  
  enum nfs_ftype {
  	NFNON = 0,
  	NFREG = 1,
  	NFDIR = 2,
  	NFBLK = 3,
  	NFCHR = 4,
  	NFLNK = 5,
  	NFSOCK = 6,
  	NFBAD = 7,
  	NFFIFO = 8
  };

  #ifdef __KERNEL__
  #include <linux/sunrpc/msg_prot.h>
  #include <linux/string.h>

  /*
   * This is the kernel NFS client file handle representation
   */
  #define NFS_MAXFHSIZE		128
  struct nfs_fh {
  	unsigned short		size;
  	unsigned char		data[NFS_MAXFHSIZE];
  };
  
  /*
   * Returns a zero iff the size and data fields match.
   * Checks only "size" bytes in the data field.
   */
  static inline int nfs_compare_fh(const struct nfs_fh *a, const struct nfs_fh *b)
  {
  	return a->size != b->size || memcmp(a->data, b->data, a->size) != 0;
  }
  
  static inline void nfs_copy_fh(struct nfs_fh *target, const struct nfs_fh *source)
  {
  	target->size = source->size;
  	memcpy(target->data, source->data, source->size);
  }
  
  
  /*
   * This is really a general kernel constant, but since nothing like
   * this is defined in the kernel headers, I have to do it here.
   */
  #define NFS_OFFSET_MAX		((__s64)((~(__u64)0) >> 1))
  
  
  enum nfs3_stable_how {
  	NFS_UNSTABLE = 0,
  	NFS_DATA_SYNC = 1,
  	NFS_FILE_SYNC = 2
  };
  #endif /* __KERNEL__ */
  #endif /* _LINUX_NFS_H */