Provided by: freebsd-manpages_6.2-1_all
VOP_OPEN, VOP_CLOSE - open or close a file
VOP_OPEN(struct vnode *vp, int mode, struct ucred *cred,
struct thread *td, int fdidx);
VOP_CLOSE(struct vnode *vp, int mode, struct ucred *cred,
struct thread *td);
The VOP_OPEN() entry point is called before a file is accessed by a
process and the VOP_CLOSE() entry point is called after a file is
finished with by the process.
The arguments are:
vp The vnode of the file.
mode The access mode required by the calling process.
td The thread which is accessing the file.
Additionally, VOP_OPEN() can accept a file descriptor number in fdidx;
this is useful for file systems which require such information, e.g.,
The access mode is a set of flags, including FREAD, FWRITE, O_NONBLOCK,
VOP_OPEN() expects vp to be locked on entry and will leave it locked on
VOP_CLOSE() expects at least a reference to be associated with the vnode
and does not care whether the vnode is locked or not. The lock and
reference state is left unchanged on return. Note that vn_close expects
an unlocked, referenced vnode and will dereference the vnode prior to
The fdidx argument to VOP_OPEN() is currently unused, use ‘-1’ for the
meantime; however, this will change in future.
Zero is returned on success, otherwise an error code is returned.
vop_open(struct vnode *vp, int mode, struct ucred *cred, struct thread *td)
* Most file systems don’t do much here.
This manual page was written by Doug Rabson.