vop_inactive(9)

NAME

VOP_INACTIVE, VOP_RECLAIM - reclaim file system resources

for a vnode

SYNOPSIS

#include <sys/param.h>
#include <sys/vnode.h>
int
VOP_INACTIVE(struct vnode *vp, struct thread *td);
int
VOP_RECLAIM(struct vnode *vp, struct thread *td);

DESCRIPTION

The arguments are:

vp The vnode being reclaimed.

VOP_INACTIVE() is called when the kernel is no longer using

the vnode.
This may be because the reference count reaches zero or it

may be that
the file system is being forcibly unmounted while there are

open files.
It can be used to reclaim space for `open but deleted'

files.

VOP_RECLAIM() is called when a vnode is being reused for a

different file
system. Any file system specific resources associated with

the vnode
should be freed.

LOCKS

For VOP_INACTIVE, the vp will be locked on entry. Your

VOP_INACTIVE code
must unlock the vp prior to returning.

For VOP_RECLAIM, the vp will not be locked on entry and

should be left
unlocked on return.

PSEUDOCODE

int
vop_inactive(struct vnode *vp, struct thread *td)
{

if (link count of vp == 0) {

/*

* Reclaim space in file system for vp.
*/

...;

}
VOP_UNLOCK(vp, 0, td);

return 0;

}

int
vop_reclaim(struct vnode *vp, struct thread *td)
{

/*

* Clean out the name cache.
*/

cache_purge(vp);

/*

* Free file system related data.
*/

...;

return 0;

}

SEE ALSO

vnode(9)

AUTHORS

This manual page was written by Doug Rabson.

BSD July 24, 1996

BSD