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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, 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 <sys/mount.h>, into which
          information 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
                        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 11.0-PRERELEASE         January 7, 2005        FreeBSD 11.0-PRERELEASE

NAME | SYNOPSIS | DESCRIPTION | SEE ALSO | AUTHORS

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