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, struct thread *td);
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 into which informa
- tion is placed
- about the file system.
- td The thread which is querying 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 sys
- tem 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.
- BSD January 7, 2005