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typedef struct { int32_t val[2]; } fsid_t;	/* file system id type */

#define VFS_NAMELEN  32 	/* length of fs type name, including nul */
#define VFS_MNAMELEN 1024	/* length of buffer for returned name */

struct statvfs {
	unsigned long	f_flag;	  /* copy of mount exported flags */
	unsigned long	f_bsize;  /* system block size */
	unsigned long	f_frsize; /* system fragment size */
	unsigned long	f_iosize; /* optimal file system block size */

	/* The following are in units of f_frsize */
	fsblkcnt_t	f_blocks; /* number of blocks in file system */
	fsblkcnt_t	f_bfree;  /* free blocks avail in file system */
	fsblkcnt_t	f_bavail; /* free blocks avail to non-root */
	fsblkcnt_t	f_bresvd; /* blocks reserved for root */

	fsfilcnt_t	f_files;  /* total file nodes in file system */
	fsfilcnt_t	f_ffree;  /* free file nodes in file system */
	fsfilcnt_t	f_favail; /* free file nodes avail to non-root */
	fsfilcnt_t	f_fresvd; /* file nodes reserved for root */

	uint64_t  f_syncreads;	  /* count of sync reads since mount */
	uint64_t  f_syncwrites;	  /* count of sync writes since mount */

	uint64_t  f_asyncreads;	  /* count of async reads since mount */
	uint64_t  f_asyncwrites;  /* count of async writes since mount */

	unsigned long	f_fsid;   /* POSIX compliant file system id */
	fsid_t          f_fsidx;  /* NetBSD compatible file system id */

	unsigned long	f_namemax;/* maximum filename length */
	uid_t		f_owner; /* user that mounted the file system */

	uint32_t	f_spare[4]; /* spare space */

	char	f_fstypename[VFS_NAMELEN]; /* fs type name */
	char	f_mntonname[VFS_MNAMELEN]; /* directory on which mounted */
	char	f_mntfromname[VFS_MNAMELEN]; /* mounted file system */
};