/*
* close the pfsnode (vp) after doing i/o.
* (vp) is not locked on entry or exit.
*
* nothing to do for procfs other than undo
* any exclusive open flag (see _open above).
*/
static int
linprocfs_close(struct vop_close_args *ap)
{
struct pfsnode *pfs = VTOPFS(ap->a_vp);
struct proc *p;
switch (pfs->pfs_type) {
case Pmem:
if ((ap->a_fflag & FWRITE) && (pfs->pfs_flags & O_EXCL))
pfs->pfs_flags &= ~(FWRITE|O_EXCL);
/*
* If this is the last close, then it checks to see if
* the target process has PF_LINGER set in p_pfsflags,
* if this is *not* the case, then the process' stop flags
* are cleared, and the process is woken up. This is
* to help prevent the case where a process has been
* told to stop on an event, but then the requesting process
* has gone away or forgotten about it.
*/
p = NULL;
if ((ap->a_vp->v_opencount < 2)
&& (p = pfind(pfs->pfs_pid))
&& !(p->p_pfsflags & PF_LINGER)) {
p->p_stops = 0;
p->p_step = 0;
wakeup(&p->p_step);
}
if (p)
PRELE(p);
break;
default:
break;
}
return (vop_stdclose(ap));
}
/*
* nwfs_close(struct vnode *a_vp, int a_fflag)
*/
static int
nwfs_close(struct vop_close_args *ap)
{
thread_t td = curthread; /* XXX */
struct vnode *vp = ap->a_vp;
struct nwnode *np = VTONW(vp);
int error;
NCPVNDEBUG("name=%s,td=%p,c=%d\n",np->n_name,ap->a_td,np->opened);
vn_lock(vp, LK_UPGRADE | LK_RETRY);
error = 0;
if (vp->v_type == VDIR)
goto done;
if (np->opened == 0)
goto done;
error = nwfs_vinvalbuf(vp, V_SAVE, 1);
if (np->opened == 0) {
error = 0; /* huh? */
goto done;
}
if (--np->opened == 0) {
error = ncp_close_file(NWFSTOCONN(VTONWFS(vp)), &np->n_fh,
td, proc0.p_ucred);
}
np->n_atime = 0;
done:
vop_stdclose(ap);
return (error);
}
static int
puffs_vnop_close(struct vop_close_args *ap)
{
PUFFS_MSG_VARS(vn, close);
struct vnode *vp = ap->a_vp;
struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount);
vn_lock(vp, LK_UPGRADE | LK_RETRY);
if (!EXISTSOP(pmp, CLOSE))
return vop_stdclose(ap);
PUFFS_MSG_ALLOC(vn, close);
puffs_msg_setfaf(park_close);
close_msg->pvnr_fflag = ap->a_fflag;
puffs_msg_setinfo(park_close, PUFFSOP_VN,
PUFFS_VN_CLOSE, VPTOPNC(vp));
puffs_msg_enqueue(pmp, park_close);
PUFFS_MSG_RELEASE(close);
return vop_stdclose(ap);
}
static int
tmpfs_close(struct vop_close_args *v)
{
struct vnode *vp = v->a_vp;
struct tmpfs_node *node;
node = VP_TO_TMPFS_NODE(vp);
if (node->tn_links > 0) {
/* Update node times. No need to do it if the node has
* been deleted, because it will vanish after we return. */
tmpfs_update(vp);
}
return vop_stdclose(v);
}
static int
devfs_spec_close(struct vop_close_args *ap)
{
struct devfs_node *node;
struct proc *p = curproc;
struct vnode *vp = ap->a_vp;
cdev_t dev = vp->v_rdev;
int error = 0;
int needrelock;
/*
* We do special tests on the opencount so unfortunately we need
* an exclusive lock.
*/
vn_lock(vp, LK_UPGRADE | LK_RETRY);
if (dev)
devfs_debug(DEVFS_DEBUG_DEBUG,
"devfs_spec_close() called on %s! \n",
dev->si_name);
else
devfs_debug(DEVFS_DEBUG_DEBUG,
"devfs_spec_close() called, null vode!\n");
/*
* A couple of hacks for devices and tty devices. The
* vnode ref count cannot be used to figure out the
* last close, but we can use v_opencount now that
* revoke works properly.
*
* Detect the last close on a controlling terminal and clear
* the session (half-close).
*/
if (dev)
reference_dev(dev);
if (p && vp->v_opencount <= 1 && vp == p->p_session->s_ttyvp) {
p->p_session->s_ttyvp = NULL;
vrele(vp);
}
/*
* Vnodes can be opened and closed multiple times. Do not really
* close the device unless (1) it is being closed forcibly,
* (2) the device wants to track closes, or (3) this is the last
* vnode doing its last close on the device.
*
* XXX the VXLOCK (force close) case can leave vnodes referencing
* a closed device. This might not occur now that our revoke is
* fixed.
*/
devfs_debug(DEVFS_DEBUG_DEBUG, "devfs_spec_close() -1- \n");
if (dev && ((vp->v_flag & VRECLAIMED) ||
(dev_dflags(dev) & D_TRACKCLOSE) ||
(vp->v_opencount == 1))) {
/*
* Ugly pty magic, to make pty devices disappear again once
* they are closed.
*/
node = DEVFS_NODE(ap->a_vp);
if (node && (node->flags & DEVFS_PTY))
node->flags |= DEVFS_INVISIBLE;
/*
* Unlock around dev_dclose(), unless the vnode is
* undergoing a vgone/reclaim (during umount).
*/
needrelock = 0;
if ((vp->v_flag & VRECLAIMED) == 0 && vn_islocked(vp)) {
needrelock = 1;
vn_unlock(vp);
}
/*
* WARNING! If the device destroys itself the devfs node
* can disappear here.
*
* WARNING! vn_lock() will fail if the vp is in a VRECLAIM,
* which can occur during umount.
*/
error = dev_dclose(dev, ap->a_fflag, S_IFCHR, ap->a_fp);
/* node is now stale */
if (needrelock) {
if (vn_lock(vp, LK_EXCLUSIVE |
LK_RETRY |
LK_FAILRECLAIM) != 0) {
panic("devfs_spec_close: vnode %p "
"unexpectedly could not be relocked",
vp);
}
}
} else {
error = 0;
}
devfs_debug(DEVFS_DEBUG_DEBUG, "devfs_spec_close() -2- \n");
/*
* Track the actual opens and closes on the vnode. The last close
* disassociates the rdev. If the rdev is already disassociated or
* the opencount is already 0, the vnode might have been revoked
* and no further opencount tracking occurs.
*/
if (dev)
release_dev(dev);
if (vp->v_opencount > 0)
vop_stdclose(ap);
return(error);
}
