VFS_STATFS(9)

NAME
VFS_STATFS - return file system status

SYNOPSIS
#include <sys/param.h>
#include <sys/mount.h>
#include <sys/vnode.h>
int
VFS_STATFS(struct mount *mp, struct statfs *sbp);

DESCRIPTION
The 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:

mp  The file system.

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

The fields of 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 Doug Rabson.