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
AUTHORS
This manual page was written by Doug Rabson.