Copyright (c) 1996 Doug Rabson All rights reserved. This program is free software. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in...
NAMEVFS_STATFS - return file system status
SYNOPSISIn sys/param.h In sys/mount.h In sys/vnode.h Ft int Fn VFS_STATFS struct mount *mp struct statfs *sbp
DESCRIPTIONThe Fn 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:
- Fa mp
- The file system.
- Fa sbp
- A Vt statfs structure, as defined by In sys/mount.h , into which information is placed about the file system.
The fields of Vt struct statfs related to the file system are as follows:
- Type of file system.
- A copy of mount exported flags.
- Fragment size.
- Optimal transfer block size.
- The total number of data blocks in the file system.
- The number of free blocks in the file system.
- The number of free blocks available to non-superuser processes.
- The total number of file nodes in the file system.
- The number of free nodes available to non-superuser processes.
- The number of synchronous writes since the file system was mounted.
- The number of asynchronous writes since the file system was mounted.
- The number of synchronous reads since the file system was mounted.
- The number of asynchronous reads since the file system was mounted.
- The maximum file name length for this file system.
- The user ID of the user that mounted the file system.
- Unique file system ID.
- The file system type name; a string of at most MFSNAMELEN bytes.
- The device name the file system was mounted from; a string of at most MNAMELEN bytes.
- The name of the directory on which the file system is mounted; a string of at most MNAMELEN bytes.