From 7df2842deef5cf746f9dfbf3e7b10df8b796b4e2 Mon Sep 17 00:00:00 2001
From: Jonathan Lemon <jlemon@FreeBSD.org>
Date: Fri, 23 Feb 2001 20:06:01 +0000
Subject: Add a NOTE_REVOKE flag for vnodes, which is triggered from within
 vclean(). Use this to tell a filter attached to a vnode that the underlying
 vnode is no longer valid, by returning EV_EOF.

PR: kern/25309, kern/25206
---
 sys/kern/vfs_export.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'sys/kern/vfs_export.c')

diff --git a/sys/kern/vfs_export.c b/sys/kern/vfs_export.c
index 3c99779ca7b0..f10edb221f44 100644
--- a/sys/kern/vfs_export.c
+++ b/sys/kern/vfs_export.c
@@ -53,6 +53,7 @@
 #include <sys/dirent.h>
 #include <sys/domain.h>
 #include <sys/eventhandler.h>
+#include <sys/event.h>
 #include <sys/fcntl.h>
 #include <sys/kernel.h>
 #include <sys/kthread.h>
@@ -2745,6 +2746,9 @@ vn_pollevent(vp, events)
 	mtx_unlock(&vp->v_pollinfo.vpi_lock);
 }
 
+#define VN_KNOTE(vp, b) \
+	KNOTE((struct klist *)&vp->v_pollinfo.vpi_selinfo.si_note, (b))
+
 /*
  * Wake up anyone polling on vp because it is being revoked.
  * This depends on dead_poll() returning POLLHUP for correct
@@ -2755,6 +2759,7 @@ vn_pollgone(vp)
 	struct vnode *vp;
 {
 	mtx_lock(&vp->v_pollinfo.vpi_lock);
+        VN_KNOTE(vp, NOTE_REVOKE);
 	if (vp->v_pollinfo.vpi_events) {
 		vp->v_pollinfo.vpi_events = 0;
 		selwakeup(&vp->v_pollinfo.vpi_selinfo);
-- 
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