VFS_STATFS (9)

Leading comments

Copyright (c) 1996 Doug Rabson

All rights reserved.

This program is free software.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
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   notice, this list of conditions and the following disclaimer in...

(The comments found at the beginning of the groff file "man9/VFS_STATFS.9freebsd".)

NAME

VFS_STATFS - return file system status

SYNOPSIS

In sys/param.h In sys/mount.h In sys/vnode.h Ft int Fn VFS_STATFS struct mount *mp struct statfs *sbp

DESCRIPTION

The Fn VFS_STATFS macro returns various pieces of information about the file system, including recommended I/O sizes, free space, free inodes, etc.

The arguments it expects are:

Fa mp

The file system.

Fa sbp

A Vt statfs structure, as defined by In sys/mount.h , into which information is placed about the file system.

The fields of Vt struct statfs related to the file system are as follows:

f_type

Type of file system.

f_flags

A copy of mount exported flags.

f_bsize

Fragment size.

f_iosize

Optimal transfer block size.

f_blocks

The total number of data blocks in the file system.

f_bfree

The number of free blocks in the file system.

f_bavail

The number of free blocks available to non-superuser processes.

f_files

The total number of file nodes in the file system.

f_ffree

The number of free nodes available to non-superuser processes.

f_syncwrites

The number of synchronous writes since the file system was mounted.

f_asyncwrites

The number of asynchronous writes since the file system was mounted.

f_syncreads

The number of synchronous reads since the file system was mounted.

f_asyncreads

The number of asynchronous reads since the file system was mounted.

f_namemax

The maximum file name length for this file system.

f_owner

The user ID of the user that mounted the file system.

f_fsid

Unique file system ID.

f_fstypename

The file system type name; a string of at most MFSNAMELEN bytes.

f_mntfromname

The device name the file system was mounted from; a string of at most MNAMELEN bytes.

f_mntonname

The name of the directory on which the file system is mounted; a string of at most MNAMELEN bytes.

SEE ALSO

VFS(9), vnode(9)

AUTHORS

This manual page was written by An Doug Rabson .