VFS_STATFS(9)          FreeBSD Kernel Developer's Manual         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.

FreeBSD 13.1-RELEASE-p6          May 23, 2009          FreeBSD 13.1-RELEASE-p6