text: #ifndef _LINUX_NFS_MOUNT_H
  #define _LINUX_NFS_MOUNT_H
  
  /*
   *  linux/include/linux/nfs_mount.h
   *
   *  Copyright (C) 1992  Rick Sladkey
   *
   *  structure passed from user-space to kernel-space during an nfs mount
   */
  #include <linux/in.h>
  #include <linux/nfs.h>
  #include <linux/nfs2.h>
  #include <linux/nfs3.h>
  
  /*
   * WARNING!  Do not delete or change the order of these fields.  If
   * a new field is required then add it to the end.  The version field
   * tracks which fields are present.  This will ensure some measure of
   * mount-to-kernel version compatibility.  Some of these aren't used yet
   * but here they are anyway.
   */
  #define NFS_MOUNT_VERSION	6
  #define NFS_MAX_CONTEXT_LEN	256
  
  struct nfs_mount_data {
  	int		version;		/* 1 */
  	int		fd;			/* 1 */
  	struct nfs2_fh	old_root;		/* 1 */
  	int		flags;			/* 1 */
  	int		rsize;			/* 1 */
  	int		wsize;			/* 1 */
  	int		timeo;			/* 1 */
  	int		retrans;		/* 1 */
  	int		acregmin;		/* 1 */
  	int		acregmax;		/* 1 */
  	int		acdirmin;		/* 1 */
  	int		acdirmax;		/* 1 */
  	struct sockaddr_in addr;		/* 1 */
  	char		hostname[NFS_MAXNAMLEN + 1];		/* 1 */
  	int		namlen;			/* 2 */
  	unsigned int	bsize;			/* 3 */
  	struct nfs3_fh	root;			/* 4 */
  	int		pseudoflavor;		/* 5 */
  	char		context[NFS_MAX_CONTEXT_LEN + 1];	/* 6 */
  };
  
  /* bits in the flags field visible to user space */
  
  #define NFS_MOUNT_SOFT		0x0001	/* 1 */
  #define NFS_MOUNT_INTR		0x0002	/* 1 */ /* now unused, but ABI */
  #define NFS_MOUNT_SECURE	0x0004	/* 1 */
  #define NFS_MOUNT_POSIX		0x0008	/* 1 */
  #define NFS_MOUNT_NOCTO		0x0010	/* 1 */
  #define NFS_MOUNT_NOAC		0x0020	/* 1 */
  #define NFS_MOUNT_TCP		0x0040	/* 2 */
  #define NFS_MOUNT_VER3		0x0080	/* 3 */
  #define NFS_MOUNT_KERBEROS	0x0100	/* 3 */
  #define NFS_MOUNT_NONLM		0x0200	/* 3 */
  #define NFS_MOUNT_BROKEN_SUID	0x0400	/* 4 */
  #define NFS_MOUNT_NOACL		0x0800	/* 4 */
  #define NFS_MOUNT_STRICTLOCK	0x1000	/* reserved for NFSv4 */
  #define NFS_MOUNT_SECFLAVOUR	0x2000	/* 5 */
  #define NFS_MOUNT_NORDIRPLUS	0x4000	/* 5 */
  #define NFS_MOUNT_UNSHARED	0x8000	/* 5 */
  #define NFS_MOUNT_FLAGMASK	0xFFFF
  
  /* The following are for internal use only */
  #define NFS_MOUNT_LOOKUP_CACHE_NONEG	0x10000
  #define NFS_MOUNT_LOOKUP_CACHE_NONE	0x20000
  #define NFS_MOUNT_NORESVPORT		0x40000
  
  #endif
  