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VFS_STATFS(9FREEBSD) - man page online | system kernel interfaces

Return file system status.

Chapter
May 23, 2009
VFS_STATFS(9)                     BSD 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, includ‐ ing 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.
BSD May 23, 2009 BSD
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VFS_STATFS(9freebsd) referred by VFS(9freebsd)
refer to VFS(9freebsd) | vnode(9freebsd)