PSARC/2007/027 File Events Notification API

6367770 RFE: add userland interface to fem (file event monitoring)

34 files changed, 2986 insertions, 110 deletions

diff --git a/usr/src/uts/common/c2/audit_event.c b/usr/src/uts/common/c2/audit_event.c
index 5dfc75ec04..8b99857df6 100644
--- a/usr/src/uts/common/c2/audit_event.c
+++ b/usr/src/uts/common/c2/audit_event.c
@@ -74,6 +74,8 @@
 #include <sys/socketvar.h>
 #include <netinet/in.h>
 #include <sys/ddi.h>
+#include <sys/port_impl.h>
+
 
 extern token_t	*au_to_sock_inet(struct sockaddr_in *);
 
@@ -92,6 +94,7 @@ static au_event_t	aui_execv(au_event_t);
 static au_event_t	aui_execve(au_event_t);
 static au_event_t	aui_memcntl(au_event_t);
 static au_event_t	aui_sysinfo(au_event_t);
+static au_event_t	aui_portfs(au_event_t);
 static au_event_t	aui_auditsys(au_event_t);
 static au_event_t	aui_modctl(au_event_t);
 static au_event_t	aui_acl(au_event_t);
@@ -577,7 +580,7 @@ aui_null,	AUE_NULL,	aus_null,	/* 180 (loadable) kaio */
 		auf_null,	0,
 aui_null,	AUE_NULL,	aus_null,	/* 181 (loadable) */
 		auf_null,	0,
-aui_null,	AUE_NULL,	aus_null,	/* 182 (loadable) */
+aui_portfs,	AUE_PORTFS,	aus_null,	/* 182 (loadable) portfs */
 		auf_null,	0,
 aui_null,	AUE_NULL,	aus_null,	/* 183 (loadable) */
 		auf_null,	0,
@@ -5608,3 +5611,34 @@ aui_forksys(au_event_t e)
 
 	return (e);
 }
+
+/*ARGSUSED*/
+static au_event_t
+aui_portfs(au_event_t e)
+{
+	struct a {		/* portfs */
+		long	a1;
+		long	a2;
+		long	a3;
+	} *uap = (struct a *)ttolwp(curthread)->lwp_ap;
+
+	/*
+	 * check opcode
+	 */
+	switch (((uint_t)uap->a1) & PORT_CODE_MASK) {
+	case PORT_ASSOCIATE:
+	case PORT_DISSOCIATE:
+		/*
+		 * check source
+		 */
+		if ((uint_t)uap->a3 == PORT_SOURCE_FILE) {
+			e = AUE_PORTFS;
+		} else {
+			e = AUE_NULL;
+		}
+		break;
+	default:
+		e = AUE_NULL;
+	}
+	return (e);
+}
diff --git a/usr/src/uts/common/c2/audit_kevents.h b/usr/src/uts/common/c2/audit_kevents.h
index 01a522ba5b..dbb7323185 100644
--- a/usr/src/uts/common/c2/audit_kevents.h
+++ b/usr/src/uts/common/c2/audit_kevents.h
@@ -337,9 +337,10 @@ extern "C" {
 #define	AUE_PF_POLICY_FLIP	298	/* =as Flip IPsec policy */
 #define	AUE_PF_POLICY_FLUSH	299	/* =as Flush IPsec policy rules */
 #define	AUE_PF_POLICY_ALGS	300	/* =as Update IPsec algorithms */
+#define	AUE_PORTFS		301	/* =fa */
 /* NOTE: update MAX_KEVENTS below if events are added. */
 
-#define	MAX_KEVENTS		300
+#define	MAX_KEVENTS		301
 
 
 #ifdef __cplusplus
diff --git a/usr/src/uts/common/fs/autofs/auto_vnops.c b/usr/src/uts/common/fs/autofs/auto_vnops.c
index 0587ed066e..dec18bd6e1 100644
--- a/usr/src/uts/common/fs/autofs/auto_vnops.c
+++ b/usr/src/uts/common/fs/autofs/auto_vnops.c
@@ -105,6 +105,7 @@ const fs_operation_def_t auto_vnodeops_template[] = {
 	VOPNAME_FRLOCK,		{ .error = fs_error },
 	VOPNAME_DISPOSE,	{ .error = fs_error },
 	VOPNAME_SHRLOCK,	{ .error = fs_error },
+	VOPNAME_VNEVENT,	{ .vop_vnevent = fs_vnevent_support },
 	NULL,			NULL
 };
 
diff --git a/usr/src/uts/common/fs/fem.c b/usr/src/uts/common/fs/fem.c
index 93cae4d737..afb8d5da20 100644
--- a/usr/src/uts/common/fs/fem.c
+++ b/usr/src/uts/common/fs/fem.c
@@ -1595,7 +1595,7 @@ vhead_shrlock(vnode_t *vp, int cmd, struct shrlock *shr, int flag,
 }
 
 static int
-vhead_vnevent(vnode_t *vp, vnevent_t vnevent)
+vhead_vnevent(vnode_t *vp, vnevent_t vnevent, vnode_t *dvp, char *cname)
 {
 	femarg_t	farg;
 	struct fem_list	*femsp;
@@ -1607,7 +1607,7 @@ vhead_vnevent(vnode_t *vp, vnevent_t vnevent)
 		func = (int (*)()) (vp->v_op->vop_vnevent);
 		arg0 = vp;
 		fem_unlock(vp->v_femhead);
-		errc = (*func)(arg0, vnevent);
+		errc = (*func)(arg0, vnevent, dvp, cname);
 	} else {
 		fem_addref(femsp);
 		fem_unlock(vp->v_femhead);
@@ -1615,7 +1615,7 @@ vhead_vnevent(vnode_t *vp, vnevent_t vnevent)
 		farg.fa_fnode = femsp->feml_nodes + femsp->feml_tos;
 		vsop_find(&farg, &func, int, &arg0, vop_vnevent,
 			femop_vnevent);
-		errc = (*func)(arg0, vnevent);
+		errc = (*func)(arg0, vnevent, dvp, cname);
 		fem_release(femsp);
 	}
 	return (errc);
@@ -2583,7 +2583,7 @@ vnext_shrlock(femarg_t *vf, int cmd, struct shrlock *shr, int flag,
 }
 
 int
-vnext_vnevent(femarg_t *vf, vnevent_t vnevent)
+vnext_vnevent(femarg_t *vf, vnevent_t vnevent, vnode_t *dvp, char *cname)
 {
 	int (*func)() = NULL;
 	void *arg0 = NULL;
@@ -2593,9 +2593,10 @@ vnext_vnevent(femarg_t *vf, vnevent_t vnevent)
 	vsop_find(vf, &func, int, &arg0, vop_vnevent, femop_vnevent);
 	ASSERT(func != NULL);
 	ASSERT(arg0 != NULL);
-	return ((*func)(arg0, vnevent));
+	return ((*func)(arg0, vnevent, dvp, cname));
 }
 
+
 int
 vfsnext_mount(fsemarg_t *vf, vnode_t *mvp, struct mounta *uap, cred_t *cr)
 {
diff --git a/usr/src/uts/common/fs/fs_subr.c b/usr/src/uts/common/fs/fs_subr.c
index 0fe058556d..c88e8b3268 100644
--- a/usr/src/uts/common/fs/fs_subr.c
+++ b/usr/src/uts/common/fs/fs_subr.c
@@ -633,7 +633,7 @@ fs_shrlock(struct vnode *vp, int cmd, struct shrlock *shr, int flag, cred_t *cr)
 
 /*ARGSUSED1*/
 int
-fs_vnevent_nosupport(vnode_t *vp, vnevent_t vnevent)
+fs_vnevent_nosupport(vnode_t *vp, vnevent_t vnevent, vnode_t *dvp, char *cname)
 {
 	ASSERT(vp != NULL);
 	return (ENOTSUP);
@@ -641,7 +641,7 @@ fs_vnevent_nosupport(vnode_t *vp, vnevent_t vnevent)
 
 /*ARGSUSED1*/
 int
-fs_vnevent_support(vnode_t *vp, vnevent_t vnevent)
+fs_vnevent_support(vnode_t *vp, vnevent_t vnevent, vnode_t *dvp, char *cname)
 {
 	ASSERT(vp != NULL);
 	return (0);
diff --git a/usr/src/uts/common/fs/fs_subr.h b/usr/src/uts/common/fs/fs_subr.h
index 2f2056e6f3..f0b536d0f0 100644
--- a/usr/src/uts/common/fs/fs_subr.h
+++ b/usr/src/uts/common/fs/fs_subr.h
@@ -22,7 +22,7 @@
 /*	  All Rights Reserved  	*/
 
 /*
- * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
+ * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
@@ -78,8 +78,8 @@ extern void	fs_nodispose(struct vnode *, page_t *, int, int, struct cred *);
 extern int	fs_fab_acl(struct vnode *, vsecattr_t *, int flag, cred_t *);
 extern int	fs_shrlock(struct vnode *, int, struct shrlock *, int,
 			cred_t *);
-extern int	fs_vnevent_nosupport(vnode_t *, vnevent_t);
-extern int	fs_vnevent_support(vnode_t *, vnevent_t);
+extern int	fs_vnevent_nosupport(vnode_t *, vnevent_t, vnode_t *, char *);
+extern int	fs_vnevent_support(vnode_t *, vnevent_t, vnode_t *, char *);
 extern int	fs_acl_nontrivial(struct vnode *vp, struct cred *cr);
 extern int	fs_need_estale_retry(int);
 
diff --git a/usr/src/uts/common/fs/mntfs/mntvfsops.c b/usr/src/uts/common/fs/mntfs/mntvfsops.c
index f148bb4af4..5ea37b3e91 100644
--- a/usr/src/uts/common/fs/mntfs/mntvfsops.c
+++ b/usr/src/uts/common/fs/mntfs/mntvfsops.c
@@ -104,11 +104,14 @@ _info(struct modinfo *modinfop)
  * is ever modified to become unloadable.
  */
 
-static int	mntfstype;
+extern int	mntfstype;
 static major_t	mnt_major;
 static minor_t	mnt_minor;
 static kmutex_t	mnt_minor_lock;
 
+extern struct vnode *mntdummyvp;
+struct vnodeops *mntdummyvnodeops;
+
 /*
  * /mnttab VFS operations vector.
  */
@@ -122,6 +125,7 @@ mntinitrootnode(mntnode_t *mnp)
 	bzero((caddr_t)mnp, sizeof (*mnp));
 
 	mnp->mnt_vnode = vn_alloc(KM_SLEEP);
+	mntdummyvp = vn_alloc(KM_SLEEP);
 
 	vp = MTOV(mnp);
 
@@ -129,6 +133,10 @@ mntinitrootnode(mntnode_t *mnp)
 	vn_setops(vp, mntvnodeops);
 	vp->v_type = VREG;
 	vp->v_data = (caddr_t)mnp;
+	mntdummyvp->v_flag = VNOMOUNT|VNOMAP|VNOSWAP|VNOCACHE;
+	vn_setops(mntdummyvp, mntdummyvnodeops);
+	mntdummyvp->v_type = VREG;
+	mntdummyvp->v_data = (caddr_t)mnp;
 }
 
 static int
@@ -142,6 +150,7 @@ mntinit(int fstype, char *name)
 		NULL,			NULL
 	};
 	extern const fs_operation_def_t mnt_vnodeops_template[];
+	extern const fs_operation_def_t mnt_dummyvnodeops_template[];
 	int error;
 
 	mntfstype = fstype;
@@ -158,6 +167,10 @@ mntinit(int fstype, char *name)
 	/* Vnode ops too. */
 
 	error = vn_make_ops(name, mnt_vnodeops_template, &mntvnodeops);
+	if (!error) {
+		error = vn_make_ops(name, mnt_dummyvnodeops_template,
+		    &mntdummyvnodeops);
+	}
 	if (error != 0) {
 		(void) vfs_freevfsops_by_type(fstype);
 		cmn_err(CE_WARN, "mntinit: bad vnode ops template");
@@ -236,6 +249,7 @@ mntmount(struct vfs *vfsp, struct vnode *mvp,
 	vfsp->vfs_bsize = DEV_BSIZE;
 	mntinitrootnode(mnp);
 	MTOV(mnp)->v_vfsp = vfsp;
+	mntdummyvp->v_vfsp = vfsp;
 	mnp->mnt_mountvp = mvp;
 	vn_exists(MTOV(mnp));
 	return (0);
@@ -252,6 +266,22 @@ mntunmount(struct vfs *vfsp, int flag, struct cred *cr)
 		return (EPERM);
 
 	/*
+	 * Ensure that the dummy vnode is not being referenced.
+	 */
+	if (mntdummyvp) {
+		mutex_enter(&mntdummyvp->v_lock);
+		if (vp->v_count > 1) {
+			mutex_exit(&mntdummyvp->v_lock);
+			return (EBUSY);
+		}
+
+		mutex_exit(&mntdummyvp->v_lock);
+		vn_invalid(mntdummyvp);
+		vn_free(mntdummyvp);
+		mntdummyvp = NULL;
+	}
+
+	/*
 	 * Ensure that no /mnttab vnodes are in use on this mount point.
 	 */
 	mutex_enter(&vp->v_lock);
diff --git a/usr/src/uts/common/fs/mntfs/mntvnops.c b/usr/src/uts/common/fs/mntfs/mntvnops.c
index 79f3a090b7..a10946a151 100644
--- a/usr/src/uts/common/fs/mntfs/mntvnops.c
+++ b/usr/src/uts/common/fs/mntfs/mntvnops.c
@@ -46,6 +46,8 @@
 static mntnode_t *mntgetnode(vnode_t *);
 
 vnodeops_t *mntvnodeops;
+vnodeops_t *mntdummyvnodeops;
+extern struct vnode *mntdummyvp;
 
 /*
  * Design of kernel mnttab accounting.
@@ -488,6 +490,40 @@ typedef struct extmnttab32 {
 #endif
 
 /*
+ * called to generate a dummy read vop call so that
+ * any module monitoring /etc/mnttab for access gets notified.
+ */
+static void
+mntdummyreadop()
+{
+	struct uio	uio;
+	struct iovec	iov;
+	char		tbuf[1];
+
+	/*
+	 * Make a VOP_READ call on the dummy vnode so that any
+	 * module interested in mnttab getting modified could
+	 * intercept this vnode and capture the event.
+	 *
+	 * Pass a dummy uio struct. Nobody should reference the buffer.
+	 * We need to pass a valid uio struct pointer to take care of
+	 * any module intercepting this vnode which could attempt to
+	 * look at it. Currently only the file events notification
+	 * module intercepts this vnode.
+	 */
+	bzero(&uio, sizeof (uio));
+	bzero(&iov, sizeof (iov));
+	iov.iov_base = tbuf;
+	iov.iov_len = 0;
+	uio.uio_iov = &iov;
+	uio.uio_iovcnt = 1;
+	uio.uio_loffset = 0;
+	uio.uio_segflg = UIO_SYSSPACE;
+	uio.uio_resid = 0;
+	(void) VOP_READ(mntdummyvp, &uio, 0, kcred, NULL);
+}
+
+/*
  * Snapshot the latest version of the kernel mounted resource information
  *
  * There are two types of snapshots: one destined for reading, and one destined
@@ -633,7 +669,7 @@ mntfs_snapshot(mntnode_t *mnp, int forread, int datamodel)
 		mntfs_freesnap(snap);
 		return (ENOMEM);
 	}
-
+	mntdummyreadop();
 	return (0);
 }
 
@@ -760,7 +796,7 @@ mntread(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cred, caller_context_t *ct)
 		error = uiomove(buf, len, UIO_READ, uio);
 	}
 	kmem_free(buf, len);
-
+	mntdummyreadop();
 	return (error);
 }
 
@@ -1128,6 +1164,22 @@ mntioctl(struct vnode *vp, int cmd, intptr_t arg, int flag,
 	return (error);
 }
 
+/* ARGSUSED */
+static int
+mntdummyread(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cred,
+	caller_context_t *ct)
+{
+	return (0);
+}
+
+/* ARGSUSED */
+static int
+mntdummywrite(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cred,
+	caller_context_t *ct)
+{
+	return (0);
+}
+
 
 /*
  * /mntfs vnode operations vector
@@ -1147,3 +1199,10 @@ const fs_operation_def_t mnt_vnodeops_template[] = {
 	VOPNAME_SHRLOCK,	{ .error = fs_error },
 	NULL,			NULL
 };
+
+const fs_operation_def_t mnt_dummyvnodeops_template[] = {
+	VOPNAME_READ, 		{ .vop_read = mntdummyread },
+	VOPNAME_WRITE, 		{ .vop_write = mntdummywrite },
+	VOPNAME_VNEVENT,	{ .vop_vnevent = fs_vnevent_support },
+	NULL, NULL
+};
diff --git a/usr/src/uts/common/fs/nfs/nfs3_vnops.c b/usr/src/uts/common/fs/nfs/nfs3_vnops.c
index 7a9355b4a4..39bdc1aa00 100644
--- a/usr/src/uts/common/fs/nfs/nfs3_vnops.c
+++ b/usr/src/uts/common/fs/nfs/nfs3_vnops.c
@@ -257,6 +257,7 @@ const fs_operation_def_t nfs3_vnodeops_template[] = {
 	VOPNAME_SETSECATTR,	{ .vop_setsecattr = nfs3_setsecattr },
 	VOPNAME_GETSECATTR,	{ .vop_getsecattr = nfs3_getsecattr },
 	VOPNAME_SHRLOCK,	{ .vop_shrlock = nfs3_shrlock },
+	VOPNAME_VNEVENT, 	{ .vop_vnevent = fs_vnevent_support },
 	NULL,			NULL
 };
 
@@ -2225,8 +2226,13 @@ top:
 		nfs_rw_exit(&drp->r_rwlock);
 		if (error) {
 			VN_RELE(vp);
-		} else
+		} else {
+			/*
+			 * existing file got truncated, notify.
+			 */
+			vnevent_create(vp);
 			*vpp = vp;
+		}
 		return (error);
 	}
 
@@ -2861,6 +2867,9 @@ nfs3_remove(vnode_t *dvp, char *nm, cred_t *cr)
 		}
 	}
 
+	if (error == 0) {
+		vnevent_remove(vp, dvp, nm);
+	}
 	VN_RELE(vp);
 
 	nfs_rw_exit(&drp->r_rwlock);
@@ -2936,6 +2945,12 @@ nfs3_link(vnode_t *tdvp, vnode_t *svp, char *tnm, cred_t *cr)
 
 	nfs_rw_exit(&tdrp->r_rwlock);
 
+	if (!error) {
+		/*
+		 * Notify the source file of this link operation.
+		 */
+		vnevent_link(svp);
+	}
 	return (error);
 }
 
@@ -2962,7 +2977,7 @@ nfs3rename(vnode_t *odvp, char *onm, vnode_t *ndvp, char *nnm, cred_t *cr)
 	RENAME3args args;
 	RENAME3res res;
 	int douprintf;
-	vnode_t *nvp;
+	vnode_t *nvp = NULL;
 	vnode_t *ovp = NULL;
 	char *tmpname;
 	rnode_t *rp;
@@ -3120,8 +3135,6 @@ nfs3rename(vnode_t *odvp, char *onm, vnode_t *ndvp, char *nnm, cred_t *cr)
 			}
 			mutex_exit(&rp->r_statelock);
 		}
-
-		VN_RELE(nvp);
 	}
 
 	if (ovp == NULL) {
@@ -3144,6 +3157,9 @@ nfs3rename(vnode_t *odvp, char *onm, vnode_t *ndvp, char *nnm, cred_t *cr)
 		if (error) {
 			nfs_rw_exit(&odrp->r_rwlock);
 			nfs_rw_exit(&ndrp->r_rwlock);
+			if (nvp) {
+				VN_RELE(nvp);
+			}
 			return (error);
 		}
 		ASSERT(ovp != NULL);
@@ -3170,6 +3186,9 @@ nfs3rename(vnode_t *odvp, char *onm, vnode_t *ndvp, char *nnm, cred_t *cr)
 		VN_RELE(ovp);
 		nfs_rw_exit(&odrp->r_rwlock);
 		nfs_rw_exit(&ndrp->r_rwlock);
+		if (nvp) {
+			VN_RELE(nvp);
+		}
 		return (error);
 	}
 
@@ -3232,6 +3251,19 @@ nfs3rename(vnode_t *odvp, char *onm, vnode_t *ndvp, char *nnm, cred_t *cr)
 			error = EEXIST;
 	}
 
+	if (error == 0) {
+		if (nvp)
+			vnevent_rename_dest(nvp, ndvp, nnm);
+
+		if (odvp != ndvp)
+			vnevent_rename_dest_dir(ndvp);
+		ASSERT(ovp != NULL);
+		vnevent_rename_src(ovp, odvp, onm);
+	}
+
+	if (nvp) {
+		VN_RELE(nvp);
+	}
 	VN_RELE(ovp);
 
 	nfs_rw_exit(&odrp->r_rwlock);
@@ -3436,6 +3468,9 @@ nfs3_rmdir(vnode_t *dvp, char *nm, vnode_t *cdir, cred_t *cr)
 			error = EEXIST;
 	}
 
+	if (error == 0) {
+		vnevent_rmdir(vp, dvp, nm);
+	}
 	VN_RELE(vp);
 
 	nfs_rw_exit(&drp->r_rwlock);
@@ -4687,9 +4722,9 @@ again:
 			}
 
 			if (!readahead_issued && !error) {
-			    mutex_enter(&rp->r_statelock);
-			    rp->r_nextr = io_off + io_len;
-			    mutex_exit(&rp->r_statelock);
+				mutex_enter(&rp->r_statelock);
+				rp->r_nextr = io_off + io_len;
+				mutex_exit(&rp->r_statelock);
 			}
 		}
 	}
diff --git a/usr/src/uts/common/fs/nfs/nfs4_deleg_ops.c b/usr/src/uts/common/fs/nfs/nfs4_deleg_ops.c
index 8ac83ac53c..90cd69efb4 100644
--- a/usr/src/uts/common/fs/nfs/nfs4_deleg_ops.c
+++ b/usr/src/uts/common/fs/nfs/nfs4_deleg_ops.c
@@ -2,9 +2,8 @@
  * CDDL HEADER START
  *
  * The contents of this file are subject to the terms of the
- * Common Development and Distribution License, Version 1.0 only
- * (the "License").  You may not use this file except in compliance
- * with the License.
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
  *
  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  * or http://www.opensolaris.org/os/licensing.
@@ -20,7 +19,7 @@
  * CDDL HEADER END
  */
 /*
- * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
+ * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
@@ -346,10 +345,13 @@ deleg_setsecattr(
 	return (vnext_setsecattr(arg, vsap, flag, cr));
 }
 
+/* ARGSUSED */
 int
 deleg_vnevent(
 	femarg_t *arg,
-	vnevent_t vnevent)
+	vnevent_t vnevent,
+	vnode_t *dvp,
+	char *name)
 {
 	clock_t rc;
 	rfs4_file_t *fp;
@@ -380,5 +382,5 @@ deleg_vnevent(
 	default:
 		break;
 	}
-	return (vnext_vnevent(arg, vnevent));
+	return (vnext_vnevent(arg, vnevent, dvp, name));
 }
diff --git a/usr/src/uts/common/fs/nfs/nfs4_vnops.c b/usr/src/uts/common/fs/nfs/nfs4_vnops.c
index 565dd58e32..bac5e0b72b 100644
--- a/usr/src/uts/common/fs/nfs/nfs4_vnops.c
+++ b/usr/src/uts/common/fs/nfs/nfs4_vnops.c
@@ -404,6 +404,7 @@ const fs_operation_def_t nfs4_vnodeops_template[] = {
 	VOPNAME_SETSECATTR,	{ .vop_setsecattr = nfs4_setsecattr },
 	VOPNAME_GETSECATTR,	{ .vop_getsecattr = nfs4_getsecattr },
 	VOPNAME_SHRLOCK,	{ .vop_shrlock = nfs4_shrlock },
+	VOPNAME_VNEVENT, 	{ .vop_vnevent = fs_vnevent_support },
 	NULL,			NULL
 };
 
@@ -6387,6 +6388,7 @@ nfs4_create(vnode_t *dvp, char *nm, struct vattr *va, enum vcexcl exclusive,
 	vnode_t *tempvp;
 	enum createmode4 createmode;
 	bool_t must_trunc = FALSE;
+	int	truncating = 0;
 
 	if (nfs_zone() != VTOMI4(dvp)->mi_zone)
 		return (EPERM);
@@ -6517,6 +6519,7 @@ top:
 							AT_TYPE | AT_MODE);
 					vattr.va_type = VREG;
 					createmode = UNCHECKED4;
+					truncating = 1;
 					goto create_otw;
 				}
 			}
@@ -6526,6 +6529,16 @@ top:
 	if (error) {
 		VN_RELE(vp);
 	} else {
+		vnode_t *tvp;
+		rnode4_t *trp;
+		/*
+		 * existing file got truncated, notify.
+		 */
+		trp = VTOR4(vp);
+		tvp = vp;
+		if (IS_SHADOW(vp, trp))
+			tvp = RTOV4(trp);
+		vnevent_create(tvp);
 		*vpp = vp;
 	}
 	return (error);
@@ -6620,6 +6633,18 @@ create_otw:
 		goto top;
 	}
 	nfs_rw_exit(&drp->r_rwlock);
+	if (truncating && !error && *vpp) {
+		vnode_t *tvp;
+		rnode4_t *trp;
+		/*
+		 * existing file got truncated, notify.
+		 */
+		tvp = *vpp;
+		trp = VTOR4(tvp);
+		if (IS_SHADOW(vp, trp))
+			tvp = RTOV4(trp);
+		vnevent_create(tvp);
+	}
 	return (error);
 }
 
@@ -7262,6 +7287,15 @@ recov_retry:
 	if (resp)
 		(void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)resp);
 
+	if (e.error == 0) {
+		vnode_t *tvp;
+		rnode4_t *trp;
+		trp = VTOR4(vp);
+		tvp = vp;
+		if (IS_SHADOW(vp, trp))
+			tvp = RTOV4(trp);
+		vnevent_remove(tvp, dvp, nm);
+	}
 	VN_RELE(vp);
 	return (e.error);
 }
@@ -7472,6 +7506,18 @@ recov_retry:
 	ASSERT(nfs4_consistent_type(nvp));
 	VN_RELE(nvp);
 
+	if (!e.error) {
+		vnode_t *tvp;
+		rnode4_t *trp;
+		/*
+		 * Notify the source file of this link operation.
+		 */
+		trp = VTOR4(svp);
+		tvp = svp;
+		if (IS_SHADOW(svp, trp))
+			tvp = RTOV4(trp);
+		vnevent_link(tvp);
+	}
 out:
 	kmem_free(argop, argoplist_size);
 	if (resp)
@@ -7507,7 +7553,7 @@ nfs4rename(vnode_t *odvp, char *onm, vnode_t *ndvp, char *nnm, cred_t *cr)
 {
 	int error;
 	mntinfo4_t *mi;
-	vnode_t *nvp;
+	vnode_t *nvp = NULL;
 	vnode_t *ovp = NULL;
 	char *tmpname = NULL;
 	rnode4_t *rp;
@@ -7706,7 +7752,6 @@ link_call:
 		(void) nfs4delegreturn(VTOR4(nvp), NFS4_DR_PUSH|NFS4_DR_REOPEN);
 
 		ASSERT(nfs4_consistent_type(nvp));
-		VN_RELE(nvp);
 	}
 
 	if (ovp == NULL) {
@@ -7728,6 +7773,9 @@ link_call:
 		if (error) {
 			nfs_rw_exit(&odrp->r_rwlock);
 			nfs_rw_exit(&ndrp->r_rwlock);
+			if (nvp) {
+				VN_RELE(nvp);
+			}
 			return (error);
 		}
 		ASSERT(ovp != NULL);
@@ -7755,6 +7803,9 @@ link_call:
 		VN_RELE(ovp);
 		nfs_rw_exit(&odrp->r_rwlock);
 		nfs_rw_exit(&ndrp->r_rwlock);
+		if (nvp) {
+			VN_RELE(nvp);
+		}
 		return (EINVAL);
 	}
 
@@ -7811,6 +7862,9 @@ link_call:
 		}
 		mutex_exit(&rp->r_statelock);
 
+		if (nvp) {
+			VN_RELE(nvp);
+		}
 		goto link_call;
 	}
 
@@ -7818,6 +7872,9 @@ link_call:
 		VN_RELE(ovp);
 		nfs_rw_exit(&odrp->r_rwlock);
 		nfs_rw_exit(&ndrp->r_rwlock);
+		if (nvp) {
+			VN_RELE(nvp);
+		}
 		return (error);
 	}
 
@@ -7853,6 +7910,47 @@ link_call:
 	}
 	mutex_exit(&rp->r_statelock);
 
+	/*
+	 * Notify the rename vnevents to source vnode, and to the target
+	 * vnode if it already existed.
+	 */
+	if (error == 0) {
+		vnode_t *tvp;
+		rnode4_t *trp;
+		/*
+		 * Notify the vnode. Each links is represented by
+		 * a different vnode, in nfsv4.
+		 */
+		if (nvp) {
+			trp = VTOR4(nvp);
+			tvp = nvp;
+			if (IS_SHADOW(nvp, trp))
+				tvp = RTOV4(trp);
+			vnevent_rename_dest(tvp, ndvp, nnm);
+		}
+
+		/*
+		 * if the source and destination directory are not the
+		 * same notify the destination directory.
+		 */
+		if (VTOR4(odvp) != VTOR4(ndvp)) {
+			trp = VTOR4(ndvp);
+			tvp = ndvp;
+			if (IS_SHADOW(ndvp, trp))
+				tvp = RTOV4(trp);
+			vnevent_rename_dest_dir(tvp);
+		}
+
+		trp = VTOR4(ovp);
+		tvp = ovp;
+		if (IS_SHADOW(ovp, trp))
+			tvp = RTOV4(trp);
+		vnevent_rename_src(tvp, odvp, onm);
+	}
+
+	if (nvp) {
+		VN_RELE(nvp);
+	}
 	VN_RELE(ovp);
 
 	nfs_rw_exit(&odrp->r_rwlock);
@@ -8561,6 +8659,16 @@ recov_retry:
 	if (resp)
 		(void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)resp);
 
+	if (e.error == 0) {
+		vnode_t *tvp;
+		rnode4_t *trp;
+		trp = VTOR4(vp);
+		tvp = vp;
+		if (IS_SHADOW(vp, trp))
+			tvp = RTOV4(trp);
+		vnevent_rmdir(tvp, dvp, nm);
+	}
+
 	VN_RELE(vp);
 
 	return (e.error);
@@ -10768,7 +10876,14 @@ nfs4_space(vnode_t *vp, int cmd, struct flock64 *bfp, int flag,
 static int
 nfs4_realvp(vnode_t *vp, vnode_t **vpp)
 {
-	return (EINVAL);
+	rnode4_t *rp;
+	rp = VTOR4(vp);
+
+	if (IS_SHADOW(vp, rp)) {
+		vp = RTOV4(rp);
+	}
+	*vpp = vp;
+	return (0);
 }
 
 /*
diff --git a/usr/src/uts/common/fs/nfs/nfs_vnops.c b/usr/src/uts/common/fs/nfs/nfs_vnops.c
index 5e587027d7..96b7044e6a 100644
--- a/usr/src/uts/common/fs/nfs/nfs_vnops.c
+++ b/usr/src/uts/common/fs/nfs/nfs_vnops.c
@@ -218,6 +218,7 @@ const fs_operation_def_t nfs_vnodeops_template[] = {
 	VOPNAME_SETSECATTR,	{ .vop_setsecattr = nfs_setsecattr },
 	VOPNAME_GETSECATTR,	{ .vop_getsecattr = nfs_getsecattr },
 	VOPNAME_SHRLOCK,	{ .vop_shrlock = nfs_shrlock },
+	VOPNAME_VNEVENT, 	{ .vop_vnevent = fs_vnevent_support },
 	NULL,			NULL
 };
 
@@ -1964,8 +1965,13 @@ nfs_create(vnode_t *dvp, char *nm, struct vattr *va, enum vcexcl exclusive,
 		nfs_rw_exit(&drp->r_rwlock);
 		if (error) {
 			VN_RELE(vp);
-		} else
+		} else {
+			/*
+			 * existing file got truncated, notify.
+			 */
+			vnevent_create(vp);
 			*vpp = vp;
+		}
 		return (error);
 	}
 
@@ -2246,6 +2252,9 @@ nfs_remove(vnode_t *dvp, char *nm, cred_t *cr)
 		}
 	}
 
+	if (error == 0) {
+		vnevent_remove(vp, dvp, nm);
+	}
 	VN_RELE(vp);
 
 	nfs_rw_exit(&drp->r_rwlock);
@@ -2297,6 +2306,12 @@ nfs_link(vnode_t *tdvp, vnode_t *svp, char *tnm, cred_t *cr)
 
 	nfs_rw_exit(&tdrp->r_rwlock);
 
+	if (!error) {
+		/*
+		 * Notify the source file of this link operation.
+		 */
+		vnevent_link(svp);
+	}
 	return (error);
 }
 
@@ -2323,7 +2338,7 @@ nfsrename(vnode_t *odvp, char *onm, vnode_t *ndvp, char *nnm, cred_t *cr)
 	enum nfsstat status;
 	struct nfsrnmargs args;
 	int douprintf;
-	vnode_t *nvp;
+	vnode_t *nvp = NULL;
 	vnode_t *ovp = NULL;
 	char *tmpname;
 	rnode_t *rp;
@@ -2479,8 +2494,6 @@ nfsrename(vnode_t *odvp, char *onm, vnode_t *ndvp, char *nnm, cred_t *cr)
 			}
 			mutex_exit(&rp->r_statelock);
 		}
-
-		VN_RELE(nvp);
 	}
 
 	if (ovp == NULL) {
@@ -2504,6 +2517,9 @@ nfsrename(vnode_t *odvp, char *onm, vnode_t *ndvp, char *nnm, cred_t *cr)
 		if (error) {
 			nfs_rw_exit(&odrp->r_rwlock);
 			nfs_rw_exit(&ndrp->r_rwlock);
+			if (nvp) {
+				VN_RELE(nvp);
+			}
 			return (error);
 		}
 		ASSERT(ovp != NULL);
@@ -2577,6 +2593,20 @@ nfsrename(vnode_t *odvp, char *onm, vnode_t *ndvp, char *nnm, cred_t *cr)
 		}
 	}
 
+	if (error == 0) {
+		if (nvp)
+			vnevent_rename_dest(nvp, ndvp, nnm);
+
+		if (odvp != ndvp)
+			vnevent_rename_dest_dir(ndvp);
+
+		ASSERT(ovp != NULL);
+		vnevent_rename_src(ovp, odvp, onm);
+	}
+
+	if (nvp) {
+		VN_RELE(nvp);
+	}
 	VN_RELE(ovp);
 
 	nfs_rw_exit(&odrp->r_rwlock);
@@ -2758,6 +2788,9 @@ nfs_rmdir(vnode_t *dvp, char *nm, vnode_t *cdir, cred_t *cr)
 			error = EEXIST;
 	}
 
+	if (error == 0) {
+		vnevent_rmdir(vp, dvp, nm);
+	}
 	VN_RELE(vp);
 
 	nfs_rw_exit(&drp->r_rwlock);
diff --git a/usr/src/uts/common/fs/pcfs/pc_dir.c b/usr/src/uts/common/fs/pcfs/pc_dir.c
index 88b895a212..616efe23cb 100644
--- a/usr/src/uts/common/fs/pcfs/pc_dir.c
+++ b/usr/src/uts/common/fs/pcfs/pc_dir.c
@@ -467,9 +467,9 @@ pc_dirremove(
 
 	if (error == 0) {
 		if (type == VDIR) {
-			vnevent_rmdir(PCTOV(pcp));
+			vnevent_rmdir(PCTOV(pcp), vp, namep);
 		} else {
-			vnevent_remove(PCTOV(pcp));
+			vnevent_remove(PCTOV(pcp), vp, namep);
 		}
 	}
 
@@ -633,7 +633,7 @@ top:
 		newisdir = tpcp->pc_entry.pcd_attr & PCA_DIR;
 
 		brelse(slot.sl_bp);
-		vnevent_rename_dest(PCTOV(tpcp));
+		vnevent_rename_dest(PCTOV(tpcp), PCTOV(tdp), tnm);
 		VN_RELE(PCTOV(tpcp));
 
 		/*
@@ -815,7 +815,11 @@ top:
 		}
 	}
 out:
-	vnevent_rename_src(PCTOV(pcp));
+	vnevent_rename_src(PCTOV(pcp), PCTOV(dp), snm);
+	if (dp != tdp) {
+		vnevent_rename_dest_dir(PCTOV(tdp));
+	}
+
 	VN_RELE(PCTOV(pcp));
 
 	return (error);
diff --git a/usr/src/uts/common/fs/pcfs/pc_vnops.c b/usr/src/uts/common/fs/pcfs/pc_vnops.c
index 1e6252aceb..bb49ad5ea2 100644
--- a/usr/src/uts/common/fs/pcfs/pc_vnops.c
+++ b/usr/src/uts/common/fs/pcfs/pc_vnops.c
@@ -1052,8 +1052,11 @@ pcfs_create(
 		} else if ((vp->v_type == VREG) && (vap->va_mask & AT_SIZE) &&
 		    (vap->va_size == 0)) {
 			error = pc_truncate(pcp, 0L);
-			if (error)
+			if (error) {
 				VN_RELE(PCTOV(pcp));
+			} else {
+				vnevent_create(PCTOV(pcp));
+			}
 		}
 	}
 	if (error) {
diff --git a/usr/src/uts/common/fs/portfs/port.c b/usr/src/uts/common/fs/portfs/port.c
index a2d6b95170..14be8cbbae 100644
--- a/usr/src/uts/common/fs/portfs/port.c
+++ b/usr/src/uts/common/fs/portfs/port.c
@@ -20,7 +20,7 @@
  */
 
 /*
- * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
+ * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
@@ -79,6 +79,8 @@
  *			   (see port_alert(3c)).
  * PORT_SOURCE_USER	 : events submitted by applications with
  *			   port_send(3c) or port_sendn(3c).
+ * PORT_SOURCE_FILE	 : events submitted per file being watched for file
+ *			   change events  (see port_create(3c).
  *
  * There is a user API implemented in the libc library as well as a
  * kernel API implemented in port_subr.c in genunix.
@@ -172,6 +174,21 @@
  * 	This type of event is generated from user level using the port_send()
  * 	function to send a user event to a port or the port_sendn() function
  * 	to send an event to a list of ports.
+ * PORT_SOURCE_FILE:
+ *	This event source uses the port_associate() interface to register
+ *	a file to be monitored for changes. The file name that needs to be
+ *	monitored is specified in the file_obj_t structure, a pointer to which
+ *	is passed as an argument. The event types to be monitored are specified
+ *	in the events argument.
+ *	A file events monitor is represented internal per port per object
+ *	address(the file_obj_t pointer). Which means there can be multiple
+ *	watches registered on the same file using different file_obj_t
+ *	structure pointer. With the help of the	FEM(File Event Monitoring)
+ *	hooks, the file's vnode ops are intercepted and relevant events
+ *	delivered. The port_dissociate() function is used to de-register a
+ *	file events monitor on a file. When the specified file is
+ *	removed/renamed, the file events watch/monitor is automatically
+ *	removed.
  *
  * EVENT DELIVERY / RETRIEVING EVENTS
  * Events remain in the port queue until:
@@ -215,6 +232,8 @@
  * 	This type of event is not shareable between processes.
  *    PORT_SOURCE_TIMER events
  * 	This type of event is not shareable between processes.
+ *    PORT_SOURCE_FILE events
+ * 	This type of event is not shareable between processes.
  *
  * FORK BEHAVIOUR
  * On fork(2) the child process inherits all opened file descriptors from
@@ -622,13 +641,19 @@ portfs(int opcode, uintptr_t a0, uintptr_t a1, uintptr_t a2, uintptr_t a3,
 	}
 	case	PORT_ASSOCIATE:
 	{
-		/* currently only PORT_SOURCE_FD is implemented */
-		if ((int)a1 != PORT_SOURCE_FD) {
+		switch ((int)a1) {
+		case PORT_SOURCE_FD:
+			error = port_associate_fd(pp, (int)a1, (uintptr_t)a2,
+			    (int)a3, (void *)a4);
+			break;
+		case PORT_SOURCE_FILE:
+			error = port_associate_fop(pp, (int)a1, (uintptr_t)a2,
+			    (int)a3, (void *)a4);
+			break;
+		default:
 			error = EINVAL;
 			break;
 		}
-		error = port_associate_fd(pp, (int)a1, (uintptr_t)a2, (int)a3,
-			    (void *)a4);
 		break;
 	}
 	case	PORT_SEND:
@@ -654,12 +679,17 @@ portfs(int opcode, uintptr_t a0, uintptr_t a1, uintptr_t a2, uintptr_t a3,
 	}
 	case	PORT_DISSOCIATE:
 	{
-		/* currently only PORT_SOURCE_FD is implemented */
-		if ((int)a1 != PORT_SOURCE_FD) {
+		switch ((int)a1) {
+		case PORT_SOURCE_FD:
+			error = port_dissociate_fd(pp, (uintptr_t)a2);
+			break;
+		case PORT_SOURCE_FILE:
+			error = port_dissociate_fop(pp, (uintptr_t)a2);
+			break;
+		default:
 			error = EINVAL;
 			break;
 		}
-		error = port_dissociate_fd(pp, (uintptr_t)a2);
 		break;
 	}
 	case	PORT_ALERT:
diff --git a/usr/src/uts/common/fs/portfs/port_fd.c b/usr/src/uts/common/fs/portfs/port_fd.c
index d40756e0b4..dd26b0af9c 100644
--- a/usr/src/uts/common/fs/portfs/port_fd.c
+++ b/usr/src/uts/common/fs/portfs/port_fd.c
@@ -285,7 +285,7 @@ port_associate_fd(port_t *pp, int source, uintptr_t object, int events,
 			 * Remove any events that where already fired
 			 * for this fd and are still in the port queue.
 			 */
-			port_remove_done_event(pkevp);
+			(void) port_remove_done_event(pkevp);
 		} else {
 			mutex_exit(&pkevp->portkev_lock);
 		}
diff --git a/usr/src/uts/common/fs/portfs/port_fop.c b/usr/src/uts/common/fs/portfs/port_fop.c
new file mode 100644
index 0000000000..d7ccf8253f
--- /dev/null
+++ b/usr/src/uts/common/fs/portfs/port_fop.c
@@ -0,0 +1,2154 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+/*
+ * File Events Notification
+ * ------------------------
+ *
+ * The File Events Notification facility provides file and directory change
+ * notification. It is implemented as an event source(PORT_SOURCE_FILE)
+ * under the Event Ports framework. Therefore the API is an extension to
+ * the Event Ports API.
+ *
+ * It uses the FEM (File Events Monitoring) framework to intercept
+ * operations on the files & directories and generate appropriate events.
+ *
+ * It provides event notification in accordance with what an application
+ * can find out by stat`ing the file and comparing time stamps. The various
+ * system calls that update the file's access, modification, and change
+ * time stamps are documented in the man page section 2.
+ *
+ * It is non intrusive. That is, having an active file event watch on a file
+ * or directory will not prevent it from being removed or renamed or block an
+ * unmount operation of the file system where the watched file or directory
+ * resides.
+ *
+ *
+ * Interface:
+ * ----------
+ *
+ *   The object for this event source is of type 'struct file_obj *'
+ *
+ *   The file that needs to be monitored is specified in 'fo_name'.
+ *   The time stamps collected by a stat(2) call are passed in fo_atime,
+ *   fo_mtime, fo_ctime. At the time a file events watch is registered, the
+ *   time stamps passed in are compared with the current time stamps of the
+ *   file. If it has changed, relavant events are sent immediately. If the time
+ *   stamps are all '0', they will not be compared.
+ *
+ *
+ * The events are delivered to an event port. A port is created using
+ * port_create().
+ *
+ * To register a file events watch on a file or directory.
+ *
+ *   port_associate(int port, PORT_SOURCE_FILE, (uintptr_t)&fobj, events, user)
+ *
+ *   'user' is the user pointer to be returned with the event.
+ *
+ * To de-register a file events watch,
+ *
+ *   port_dissociate(int port, PORT_SOURCE_FILE, (uintptr_t)&fobj)
+ *
+ * The events are collected using the port_get()/port_getn() interface. The
+ * event source will be PORT_SOURCE_FILE.
+ *
+ * After an event is delivered, the file events watch gets de-activated. To
+ * receive the next event, the process will have to re-register the watch and
+ * activate it by calling port_associate() again. This behavior is intentional
+ * and support proper multi threaded programming when using file events
+ * notification API.
+ *
+ *
+ * Implementation overview:
+ * ------------------------
+ *
+ * Each file events watch is represented by 'portfop_t' in the kernel. A
+ * cache(portfop_cache_t) of these file portfop_t's are maintained per event
+ * port by this source. The object here is the pointer to the file_obj
+ * structure. The portfop_t's are hashed in using the object pointer. Therefore
+ * it is possible to have multiple file event watches on a file by the same
+ * process by using different object structure(file_obj_t) and hence can
+ * receive multiple event notification for a file. These watches can be for
+ * different event types.
+ *
+ * The cached entries of these file objects are retained, even after delivering
+ * an event makring them inactive, for performance reason. The assumption
+ * is that the process would come back and re-register the file to receive
+ * further events. When there are more then 'port_fop_maxpfps' watches per file
+ * it will attempt to free the oldest inactive watch.
+ *
+ * In case the event that is being delivered is an exception event, the cached
+ * entries get removed. An exception event on a file or directory means its
+ * identity got changed(rename to/from, delete, mounted over, file system
+ * unmount).
+ *
+ * If the event port gets closed, all the associated file event watches will be
+ * removed and discarded.
+ *
+ *
+ * Data structures:
+ * ----------------
+ *
+ * The list of file event watches per file are managed by the data structure
+ * portfop_vp_t. The first time a file events watch is registered for a file,
+ * the portfop_vp_t is installed on the vnode_t's member v_fopdata. This gets
+ * removed and freed only when the vnode becomes inactive. The FEM hooks are
+ * also installed when the first watch is registered on a file. The FEM hooks
+ * get un-installed when all the watches are removed.
+ *
+ * Each file events watch is represented by the structure portfop_t. They
+ * get added to a list of portfop_t's on the vnode(portfop_vp_t). After
+ * delivering an event, the portfop_t is marked inactive but retained. It is
+ * moved to the end of the list. All the active portfop_t's are maintained at
+ * the beginning. In case of exception events, the portfop_t will be removed
+ * and discarded.
+ *
+ * To intercept unmount operations, FSEM hooks are added to the file system
+ * under which files are being watched. A hash table('portfop_vfs_hash_t') of
+ * active file systems is maintained. Each file system that has active watches
+ * is represented by 'portfop_vfs_t' and is added to the hash table.
+ * The vnode's 'portfop_vp_t' structure is added to the list of files(vnodes)
+ * being watched on the portfop_vfs_t structure.
+ *
+ *
+ * File system support:
+ * -------------------
+ *
+ * The file systems implementation has to provide vnode event notifications
+ * (vnevents) in order to support watching any files on that file system.
+ * The vnode events(vnevents) are notifications provided by the file system
+ * for name based file operations like rename, remove etc, which do not go
+ * thru the VOP_** interfaces. If the file system does not implement vnode
+ * notifications, watching for file events on such file systems is not
+ * supported. The vnode event notifications support is determined by the call
+ * vnevent_support(vp) (VOP_VNEVENT(vp, VE_SUPPORT)), which the file system
+ * has to implement.
+ *
+ *
+ * Locking order:
+ * --------------
+ *
+ * A file(vnode) can have file event watches registered by different processes.
+ * There is one portfop_t per watch registered. These are on the vnode's list
+ * protected by the mutex 'pvp_mutex' in 'portfop_vp_t'. The portfop_t's are
+ * also on the per port cache. The cache is protected by the pfc_lock of
+ * portfop_cache_t. The lock order here is 'pfc_lock' -> 'pvp_mutex'.
+ *
+ */
+
+#include <sys/types.h>
+#include <sys/systm.h>
+#include <sys/stat.h>
+#include <sys/errno.h>
+#include <sys/kmem.h>
+#include <sys/sysmacros.h>
+#include <sys/debug.h>
+#include <sys/vnode.h>
+#include <sys/poll_impl.h>
+#include <sys/port_impl.h>
+#include <sys/fem.h>
+#include <sys/vfs_opreg.h>
+#include <sys/atomic.h>
+
+/*
+ * For special case support of /etc/mnttab
+ */
+extern struct vnode *mntdummyvp;
+extern int mntfstype;
+
+#define	PORTFOP_PVFSH(vfsp)	(&portvfs_hash[PORTFOP_PVFSHASH(vfsp)])
+portfop_vfs_hash_t	 portvfs_hash[PORTFOP_PVFSHASH_SZ];
+
+/*
+ * Inactive file event watches(portfop_t) are retained on the vnode's list
+ * for performance reason. If the applications re-registers the file, the
+ * inactive entry is made active and moved up the list.
+ *
+ * If there are greater then the following number of watches on a vnode,
+ * it will attempt to discard an oldest inactive watch(pfp) at the time
+ * a new watch is being registerd and when events get delivered. We
+ * do this to avoid accumulating inactive watches on a file.
+ */
+int	port_fop_maxpfps = 20;
+
+/* local functions */
+static int	port_fop_callback(void *, int *, pid_t, int, void *);
+
+static void	port_pcache_insert(portfop_cache_t *, portfop_t *);
+static void	port_pcache_delete(portfop_cache_t *, portfop_t *);
+static void	port_close_fop(void *arg, int port, pid_t pid, int lastclose);
+
+/*
+ * port fop functions that will be the fem hooks.
+ */
+static int port_fop_open(femarg_t *vf, int mode, cred_t *cr);
+static int port_fop_read(femarg_t *vf, uio_t *uiop, int ioflag, cred_t *cr,
+		struct caller_context *ct);
+static int port_fop_write(femarg_t *vf, uio_t *uiop, int ioflag, cred_t *cr,
+		caller_context_t *ct);
+static int port_fop_map(femarg_t *vf, offset_t off, struct as *as,
+		caddr_t *addrp, size_t len, uchar_t prot, uchar_t maxport,
+		uint_t flags, cred_t *cr);
+static int port_fop_setattr(femarg_t *vf, vattr_t *vap, int flags, cred_t *cr,
+		caller_context_t *ct);
+static int port_fop_create(femarg_t *vf, char *name, vattr_t *vap,
+			vcexcl_t excl, int mode, vnode_t **vpp, cred_t *cr,
+			int flag);
+static int port_fop_remove(femarg_t *vf, char *nm, cred_t *cr);
+static int port_fop_link(femarg_t *vf, vnode_t *svp, char *tnm, cred_t *cr);
+static int port_fop_rename(femarg_t *vf, char *snm, vnode_t *tdvp, char *tnm,
+			cred_t *cr);
+static int port_fop_mkdir(femarg_t *vf, char *dirname, vattr_t *vap,
+		vnode_t **vpp, cred_t *cr);
+static int port_fop_rmdir(femarg_t *vf, char *nm, vnode_t *cdir, cred_t *cr);
+static int port_fop_readdir(femarg_t *vf, uio_t *uiop, cred_t *cr, int *eofp);
+static int port_fop_symlink(femarg_t *vf, char *linkname, vattr_t *vap,
+			char *target, cred_t *cr);
+static int port_fop_setsecattr(femarg_t *vf, vsecattr_t *vsap, int flag,
+			cred_t *cr);
+static int port_fop_vnevent(femarg_t *vf, vnevent_t vnevent, vnode_t *dvp,
+			char *cname);
+
+static int port_fop_unmount(fsemarg_t *vf, int flag, cred_t *cr);
+
+
+/*
+ * Fem hooks.
+ */
+const fs_operation_def_t	port_vnodesrc_template[] = {
+	VOPNAME_OPEN,		{ .femop_open = port_fop_open },
+	VOPNAME_READ,		{ .femop_read = port_fop_read },
+	VOPNAME_WRITE,		{ .femop_write = port_fop_write },
+	VOPNAME_MAP,		{ .femop_map = port_fop_map },
+	VOPNAME_SETATTR, 	{ .femop_setattr = port_fop_setattr },
+	VOPNAME_CREATE,		{ .femop_create = port_fop_create },
+	VOPNAME_REMOVE,		{ .femop_remove = port_fop_remove },
+	VOPNAME_LINK,		{ .femop_link = port_fop_link },
+	VOPNAME_RENAME,		{ .femop_rename = port_fop_rename },
+	VOPNAME_MKDIR,		{ .femop_mkdir = port_fop_mkdir },
+	VOPNAME_RMDIR,		{ .femop_rmdir = port_fop_rmdir },
+	VOPNAME_READDIR,	{ .femop_readdir = port_fop_readdir },
+	VOPNAME_SYMLINK,	{ .femop_symlink = port_fop_symlink },
+	VOPNAME_SETSECATTR, 	{ .femop_setsecattr = port_fop_setsecattr },
+	VOPNAME_VNEVENT,	{ .femop_vnevent = port_fop_vnevent },
+	NULL,	NULL
+};
+
+/*
+ * Fsem - vfs ops hooks
+ */
+const fs_operation_def_t	port_vfssrc_template[] = {
+	VFSNAME_UNMOUNT, 	{ .fsemop_unmount = port_fop_unmount },
+	NULL,	NULL
+};
+
+fem_t *fop_femop;
+fsem_t *fop_fsemop;
+
+static fem_t *
+port_fop_femop()
+{
+	fem_t *femp;
+	if (fop_femop != NULL)
+		return (fop_femop);
+	if (fem_create("portfop_fem",
+	    (const struct fs_operation_def *)port_vnodesrc_template,
+	    (fem_t **)&femp)) {
+		return (NULL);
+	}
+	if (casptr(&fop_femop, NULL, femp) != NULL) {
+		/*
+		 * some other thread beat us to it.
+		 */
+		fem_free(femp);
+	}
+	return (fop_femop);
+}
+
+static fsem_t *
+port_fop_fsemop()
+{
+	fsem_t *fsemp;
+	if (fop_fsemop != NULL)
+		return (fop_fsemop);
+	if (fsem_create("portfop_fsem", port_vfssrc_template, &fsemp)) {
+		return (NULL);
+	}
+	if (casptr(&fop_fsemop, NULL, fsemp) != NULL) {
+		/*
+		 * some other thread beat us to it.
+		 */
+		fsem_free(fsemp);
+	}
+	return (fop_fsemop);
+}
+
+/*
+ * port_fop_callback()
+ * - PORT_CALLBACK_DEFAULT
+ *	The file event will be delivered to the application.
+ * - PORT_CALLBACK_DISSOCIATE
+ *	The object will be dissociated from  the port.
+ * - PORT_CALLBACK_CLOSE
+ *	The object will be dissociated from the port because the port
+ *	is being closed.
+ */
+/* ARGSUSED */
+static int
+port_fop_callback(void *arg, int *events, pid_t pid, int flag, void *evp)
+{
+	portfop_t	*pfp = (portfop_t *)arg;
+	port_kevent_t	*pkevp = (port_kevent_t *)evp;
+	int		error = 0;
+
+	ASSERT((events != NULL));
+	if (flag == PORT_CALLBACK_DEFAULT) {
+		if (curproc->p_pid != pid) {
+				return (EACCES); /* deny delivery of events */
+		}
+
+		*events = pkevp->portkev_events;
+		pkevp->portkev_events = 0;
+		if (pfp != NULL) {
+			pfp->pfop_flags &= ~PORT_FOP_KEV_ONQ;
+		}
+	}
+	return (error);
+}
+
+/*
+ * Inserts a portfop_t into the port sources cache's.
+ */
+static void
+port_pcache_insert(portfop_cache_t *pfcp, portfop_t *pfp)
+{
+	portfop_t	**bucket;
+
+	ASSERT(MUTEX_HELD(&pfcp->pfc_lock));
+	bucket = PORT_FOP_BUCKET(pfcp, pfp->pfop_object);
+	pfp->pfop_hashnext = *bucket;
+	*bucket = pfp;
+	pfcp->pfc_objcount++;
+}
+
+/*
+ * Remove the pfp from the port source cache.
+ */
+static void
+port_pcache_delete(portfop_cache_t *pfcp, portfop_t *pfp)
+{
+	portfop_t	*lpdp;
+	portfop_t	*cpdp;
+	portfop_t	**bucket;
+
+	bucket = PORT_FOP_BUCKET(pfcp, pfp->pfop_object);
+	cpdp = *bucket;
+	if (pfp == cpdp) {
+		*bucket = pfp->pfop_hashnext;
+	} else {
+		while (cpdp != NULL) {
+			lpdp = cpdp;
+			cpdp = cpdp->pfop_hashnext;
+			if (cpdp == pfp) {
+				/* portfop struct found */
+				lpdp->pfop_hashnext = pfp->pfop_hashnext;
+				break;
+			}
+		}
+	}
+	pfcp->pfc_objcount--;
+}
+
+/*
+ * The vnode's(portfop_vp_t) pfp list management. The 'pvp_mutex' is held
+ * when these routines are called.
+ *
+ * The 'pvp_lpfop' member points to the oldest inactive entry on the list.
+ * It is used to discard the oldtest inactive pfp if the number of entries
+ * exceed the limit.
+ */
+static void
+port_fop_listinsert(portfop_vp_t *pvp, portfop_t *pfp, int where)
+{
+	if (where == 1) {
+		list_insert_head(&pvp->pvp_pfoplist, (void *)pfp);
+	} else {
+		list_insert_tail(&pvp->pvp_pfoplist, (void *)pfp);
+	}
+	if (pvp->pvp_lpfop == NULL) {
+		pvp->pvp_lpfop = pfp;
+	}
+	pvp->pvp_cnt++;
+}
+
+static void
+port_fop_listinsert_head(portfop_vp_t *pvp, portfop_t *pfp)
+{
+	port_fop_listinsert(pvp, pfp, 1);
+}
+
+static void
+port_fop_listinsert_tail(portfop_vp_t *pvp, portfop_t *pfp)
+{
+	/*
+	 * We point lpfop to an inactive one, if it was initially pointing
+	 * to an active one. Insert to the tail is done only when a pfp goes
+	 * inactive.
+	 */
+	if (pvp->pvp_lpfop && pvp->pvp_lpfop->pfop_flags & PORT_FOP_ACTIVE) {
+		pvp->pvp_lpfop = pfp;
+	}
+	port_fop_listinsert(pvp, pfp, 0);
+}
+
+static void
+port_fop_listremove(portfop_vp_t *pvp, portfop_t *pfp)
+{
+	if (pvp->pvp_lpfop == pfp) {
+		pvp->pvp_lpfop = list_next(&pvp->pvp_pfoplist, (void *)pfp);
+	}
+
+	list_remove(&pvp->pvp_pfoplist, (void *)pfp);
+
+	pvp->pvp_cnt--;
+	if (pvp->pvp_cnt && pvp->pvp_lpfop == NULL) {
+		pvp->pvp_lpfop = list_head(&pvp->pvp_pfoplist);
+	}
+}
+
+static void
+port_fop_listmove(portfop_vp_t *pvp, list_t *tlist)
+{
+	list_move_tail(tlist, &pvp->pvp_pfoplist);
+	pvp->pvp_lpfop = NULL;
+	pvp->pvp_cnt = 0;
+}
+
+/*
+ * Remove a portfop_t from the port cache hash table and discard it.
+ * It is called only when pfp is not on the vnode's list. Otherwise,
+ * port_remove_fop() is called.
+ */
+void
+port_pcache_remove_fop(portfop_cache_t *pfcp, portfop_t *pfp)
+{
+	port_kevent_t	*pkevp;
+
+
+	ASSERT(MUTEX_HELD(&pfcp->pfc_lock));
+
+	pkevp = pfp->pfop_pev;
+	pfp->pfop_pev = NULL;
+
+	if (pkevp != NULL) {
+		(void) port_remove_done_event(pkevp);
+		port_free_event_local(pkevp, 0);
+	}
+
+	port_pcache_delete(pfcp, pfp);
+
+	if (pfp->pfop_cname != NULL)
+		kmem_free(pfp->pfop_cname, pfp->pfop_clen + 1);
+	kmem_free(pfp, sizeof (portfop_t));
+	if (pfcp->pfc_objcount == 0)
+		cv_signal(&pfcp->pfc_lclosecv);
+}
+
+/*
+ * if we have too many watches on the vnode, attempt to discard an
+ * inactive one.
+ */
+static void
+port_fop_trimpfplist(vnode_t *vp)
+{
+	portfop_vp_t *pvp;
+	portfop_t *pfp = NULL;
+	portfop_cache_t *pfcp;
+
+	/*
+	 * Due to a reference the vnode cannot disappear, v_fopdata should
+	 * not change.
+	 */
+	if ((pvp = vp->v_fopdata) != NULL &&
+	    pvp->pvp_cnt > port_fop_maxpfps) {
+		mutex_enter(&pvp->pvp_mutex);
+		pfp = pvp->pvp_lpfop;
+		pfcp = pfp->pfop_pcache;
+		/*
+		 * only if we can get the cache lock, we need to
+		 * do this due to reverse lock order and some thread
+		 * that may be trying to reactivate this entry.
+		 */
+		if (mutex_tryenter(&pfcp->pfc_lock)) {
+			if (pfp && !(pfp->pfop_flags & PORT_FOP_ACTIVE) &&
+			    !(pfp->pfop_flags & PORT_FOP_KEV_ONQ)) {
+				port_fop_listremove(pvp, pfp);
+				pfp->pfop_flags |= PORT_FOP_REMOVING;
+			} else {
+				mutex_exit(&pfcp->pfc_lock);
+				pfp = NULL;
+			}
+		} else {
+			pfp = NULL;
+		}
+		mutex_exit(&pvp->pvp_mutex);
+
+		/*
+		 * discard pfp if any.
+		 */
+		if (pfp != NULL) {
+			port_pcache_remove_fop(pfcp, pfp);
+			mutex_exit(&pfcp->pfc_lock);
+		}
+	}
+}
+
+void
+port_fop_femuninstall(vnode_t *vp)
+{
+	portfop_vp_t	*pvp;
+	vfs_t		*vfsp;
+	portfop_vfs_t *pvfsp;
+	portfop_vfs_hash_t	*pvfsh;
+	kmutex_t	*mtx;
+
+	/*
+	 * if list is empty, uninstall fem.
+	 */
+	pvp = vp->v_fopdata;
+	ASSERT(MUTEX_HELD(&pvp->pvp_mutex));
+
+	/*
+	 * make sure the list is empty.
+	 */
+	if (!list_head(&pvp->pvp_pfoplist)) {
+
+		/*
+		 * we could possibly uninstall the fem hooks when
+		 * the vnode becomes inactive and the v_fopdata is
+		 * free. But the hooks get triggered uncessarily
+		 * even though there are no active watches. So, we
+		 * uninstall it here.
+		 */
+		(void) fem_uninstall(vp, (fem_t *)pvp->pvp_femp, vp);
+		pvp->pvp_femp = NULL;
+		mutex_exit(&pvp->pvp_mutex);
+
+
+		/*
+		 * If we uinstalled fem means no process is watching this
+		 * vnode, remove it from the vfs's list of watched vnodes.
+		 */
+		pvfsp = pvp->pvp_pvfsp;
+		vfsp = vp->v_vfsp;
+		pvfsh = PORTFOP_PVFSH(vfsp);
+		mtx = &pvfsh->pvfshash_mutex;
+		mutex_enter(mtx);
+		/*
+		 * If unmount is in progress, that thread will remove and
+		 * release the vnode from the vfs's list, just leave.
+		 */
+		if (!pvfsp->pvfs_unmount) {
+			list_remove(&pvfsp->pvfs_pvplist, pvp);
+			mutex_exit(mtx);
+			VN_RELE(vp);
+		} else {
+			mutex_exit(mtx);
+		}
+	} else {
+		mutex_exit(&pvp->pvp_mutex);
+	}
+}
+
+/*
+ * Remove pfp from the vnode's watch list and the cache and discard it.
+ * If it is the last pfp on the vnode's list, the fem hooks get uninstalled.
+ * Returns 1 if removed successfully.
+ *
+ * The *active is set to indicate if the pfp was still active(no events had
+ * been posted, or the posted event had not been collected yet and it was
+ * able to remove it from the port's queue).
+ */
+int
+port_remove_fop(portfop_t *pfp, portfop_cache_t *pfcp, int cleanup,
+    int *active)
+{
+	vnode_t		*vp;
+	portfop_vp_t	*pvp;
+	int	tactive = 0;
+
+	ASSERT(MUTEX_HELD(&pfcp->pfc_lock));
+	vp = pfp->pfop_vp;
+	pvp = vp->v_fopdata;
+	mutex_enter(&pvp->pvp_mutex);
+
+	/*
+	 * if not cleanup, remove it only if the pfp is still active and
+	 * is not being removed by some other thread.
+	 */
+	if (!cleanup && (!(pfp->pfop_flags & PORT_FOP_ACTIVE) ||
+	    pfp->pfop_flags & PORT_FOP_REMOVING)) {
+		mutex_exit(&pvp->pvp_mutex);
+		return (0);
+	}
+
+	/*
+	 * mark it inactive.
+	 */
+	if (pfp->pfop_flags & PORT_FOP_ACTIVE) {
+		pfp->pfop_flags &= ~PORT_FOP_ACTIVE;
+		tactive = 1;
+	}
+
+	/*
+	 * Check if the pfp is still on the vnode's list. This can
+	 * happen if port_fop_excep() is in the process of removing it.
+	 * In case of cleanup, just mark this pfp as inactive so that no
+	 * new events (VNEVENT) will be delivered, and remove it from the
+	 * event queue if it was already queued. Since the cache lock is
+	 * held, the pfp will not disappear, even though it is being
+	 * removed.
+	 */
+	if (pfp->pfop_flags & PORT_FOP_REMOVING) {
+		mutex_exit(&pvp->pvp_mutex);
+		if (!tactive && port_remove_done_event(pfp->pfop_pev)) {
+			pfp->pfop_flags &= ~PORT_FOP_KEV_ONQ;
+			tactive = 1;
+		}
+		if (active) {
+			*active = tactive;
+		}
+		return (1);
+	}
+
+	/*
+	 * if we find an event on the queue and removed it, then this
+	 * association is considered active.
+	 */
+	if (!tactive && port_remove_done_event(pfp->pfop_pev)) {
+		pfp->pfop_flags &= ~PORT_FOP_KEV_ONQ;
+		tactive = 1;
+	}
+
+	if (active) {
+		*active = tactive;
+	}
+	pvp = (portfop_vp_t *)vp->v_fopdata;
+
+	/*
+	 * remove pfp from the vnode's list
+	 */
+	port_fop_listremove(pvp, pfp);
+
+	/*
+	 * If no more associations on the vnode, uninstall fem hooks.
+	 * The pvp mutex will be released in this routine.
+	 */
+	port_fop_femuninstall(vp);
+	port_pcache_remove_fop(pfcp, pfp);
+	return (1);
+}
+
+/*
+ * This routine returns a pointer to a cached portfop entry, or NULL if it
+ * does not find it in the hash table. The object pointer is used as index.
+ * The entries are hashed by the object's address. We need to match the pid
+ * as the evet port can be shared between processes. The file events
+ * watches are per process only.
+ */
+portfop_t *
+port_cache_lookup_fop(portfop_cache_t *pfcp, pid_t pid, uintptr_t obj)
+{
+	portfop_t	*pfp = NULL;
+	portfop_t	**bucket;
+
+	ASSERT(MUTEX_HELD(&pfcp->pfc_lock));
+	bucket = PORT_FOP_BUCKET(pfcp, obj);
+	pfp = *bucket;
+	while (pfp != NULL) {
+		if (pfp->pfop_object == obj && pfp->pfop_pid == pid)
+			break;
+		pfp = pfp->pfop_hashnext;
+	}
+	return (pfp);
+}
+
+/*
+ * Given the file name, get the vnode and also the directory vnode
+ * On return, the vnodes are held (VN_HOLD). The caller has to VN_RELE
+ * the vnode(s).
+ */
+int
+port_fop_getdvp(void *objptr, vnode_t **vp, vnode_t **dvp,
+	char **cname, int *len, int follow)
+{
+	int error = 0;
+	struct pathname pn;
+	char *fname;
+
+	if (get_udatamodel() == DATAMODEL_NATIVE) {
+		fname = ((file_obj_t *)objptr)->fo_name;
+#ifdef  _SYSCALL32_IMPL
+	} else {
+		fname = (caddr_t)(uintptr_t)((file_obj32_t *)objptr)->fo_name;
+#endif	/* _SYSCALL32_IMPL */
+	}
+
+	/*
+	 * lookuppn may fail with EINVAL, if dvp is  non-null(like when
+	 * looking for "."). So call again with dvp = NULL.
+	 */
+	if ((error = pn_get(fname, UIO_USERSPACE, &pn)) != 0) {
+		return (error);
+	}
+
+	error = lookuppn(&pn, NULL, follow, dvp, vp);
+	if (error == EINVAL) {
+		pn_free(&pn);
+		if ((error = pn_get(fname, UIO_USERSPACE, &pn)) != 0) {
+			return (error);
+		}
+		error = lookuppn(&pn, NULL, follow, NULL, vp);
+		if (dvp != NULL) {
+			*dvp = NULL;
+		}
+	}
+
+	if (error == 0 && cname != NULL && len != NULL) {
+		pn_setlast(&pn);
+		*len = pn.pn_pathlen;
+		*cname = kmem_alloc(*len + 1, KM_SLEEP);
+		(void) strcpy(*cname, pn.pn_path);
+	} else {
+		if (cname != NULL && len != NULL) {
+			*cname = NULL;
+			*len = 0;
+		}
+	}
+
+	pn_free(&pn);
+	return (error);
+}
+
+port_source_t *
+port_getsrc(port_t *pp, int source)
+{
+	port_source_t *pse;
+	int	lock = 0;
+	/*
+	 * get the port source structure.
+	 */
+	if (!MUTEX_HELD(&pp->port_queue.portq_source_mutex)) {
+		mutex_enter(&pp->port_queue.portq_source_mutex);
+		lock = 1;
+	}
+
+	pse = pp->port_queue.portq_scache[PORT_SHASH(source)];
+	for (; pse != NULL; pse = pse->portsrc_next) {
+		if (pse->portsrc_source == source)
+			break;
+	}
+
+	if (lock) {
+		mutex_exit(&pp->port_queue.portq_source_mutex);
+	}
+	return (pse);
+}
+
+
+/*
+ * compare time stamps and generate an event if it has changed.
+ */
+static void
+port_check_timestamp(vnode_t *vp, portfop_t *pfp, void *objptr)
+{
+	vattr_t		vatt;
+	portfop_vp_t	*pvp = vp->v_fopdata;
+	int		events = 0;
+	port_kevent_t	*pkevp;
+	file_obj_t	*fobj;
+
+	if (!(pfp->pfop_flags & PORT_FOP_ACTIVE)) {
+		/*
+		 * some event got delivered, don't bother with
+		 * checking the timestamps.
+		 */
+		return;
+	}
+
+	/*
+	 * If time stamps is specified, get attributes and compare. This
+	 * needs to be done after registering. We should check if any
+	 * timestamps have been specified before getting attr XXX.
+	 */
+	vatt.va_mask = AT_ATIME|AT_MTIME|AT_CTIME;
+	if (get_udatamodel() == DATAMODEL_NATIVE) {
+		fobj = (file_obj_t *)objptr;
+		if (fobj->fo_atime.tv_sec || fobj->fo_atime.tv_nsec ||
+		    fobj->fo_mtime.tv_sec || fobj->fo_mtime.tv_nsec ||
+		    fobj->fo_ctime.tv_sec || fobj->fo_ctime.tv_nsec) {
+			if (VOP_GETATTR(vp, &vatt, 0, CRED())) {
+				return;
+			}
+		} else {
+			/*
+			 * timestamp not specified, all 0's,
+			 */
+			return;
+		}
+#ifdef  _SYSCALL32_IMPL
+	} else {
+		file_obj32_t	*fobj32;
+		fobj32 = (file_obj32_t *)objptr;
+		if (fobj32->fo_atime.tv_sec || fobj32->fo_atime.tv_nsec ||
+		    fobj32->fo_mtime.tv_sec || fobj32->fo_mtime.tv_nsec ||
+		    fobj32->fo_ctime.tv_sec || fobj32->fo_ctime.tv_nsec) {
+			if (VOP_GETATTR(vp, &vatt, 0, CRED())) {
+				return;
+			}
+		} else {
+			/*
+			 * timestamp not specified, all 0.
+			 */
+			return;
+		}
+#endif /* _SYSCALL32_IMPL */
+	}
+
+	mutex_enter(&pvp->pvp_mutex);
+	/*
+	 * The pfp cannot dissappear as the port cache lock is held.
+	 * While the pvp_mutex is held, no events will get delivered.
+	 */
+	if (pfp->pfop_flags & PORT_FOP_ACTIVE &&
+	    !(pfp->pfop_flags & PORT_FOP_REMOVING)) {
+		if (get_udatamodel() == DATAMODEL_NATIVE) {
+			fobj = (file_obj_t *)objptr;
+			if (pfp->pfop_events & FILE_ACCESS &&
+			    (fobj->fo_atime.tv_sec || fobj->fo_atime.tv_nsec) &&
+			    (vatt.va_atime.tv_sec != fobj->fo_atime.tv_sec ||
+			    vatt.va_atime.tv_nsec != fobj->fo_atime.tv_nsec))
+				events |= FILE_ACCESS;
+
+			if (pfp->pfop_events & FILE_MODIFIED &&
+			    (fobj->fo_mtime.tv_sec || fobj->fo_mtime.tv_nsec) &&
+			    (vatt.va_mtime.tv_sec != fobj->fo_mtime.tv_sec ||
+			    vatt.va_mtime.tv_nsec != fobj->fo_mtime.tv_nsec))
+				events |= FILE_MODIFIED;
+
+			if (pfp->pfop_events & FILE_ATTRIB &&
+			    (fobj->fo_ctime.tv_sec || fobj->fo_ctime.tv_nsec) &&
+			    (vatt.va_ctime.tv_sec != fobj->fo_ctime.tv_sec ||
+			    vatt.va_ctime.tv_nsec != fobj->fo_ctime.tv_nsec))
+				events |= FILE_ATTRIB;
+#ifdef  _SYSCALL32_IMPL
+		} else {
+			file_obj32_t	*fobj32;
+			fobj32 = (file_obj32_t *)objptr;
+			if (pfp->pfop_events & FILE_ACCESS &&
+			    (fobj32->fo_atime.tv_sec ||
+			    fobj32->fo_atime.tv_nsec) &&
+			    (vatt.va_atime.tv_sec != fobj32->fo_atime.tv_sec ||
+			    vatt.va_atime.tv_nsec != fobj32->fo_atime.tv_nsec))
+				events |= FILE_ACCESS;
+
+			if (pfp->pfop_events & FILE_MODIFIED &&
+			    (fobj32->fo_mtime.tv_sec ||
+			    fobj32->fo_mtime.tv_nsec) &&
+			    (vatt.va_mtime.tv_sec != fobj32->fo_mtime.tv_sec ||
+			    vatt.va_mtime.tv_nsec != fobj32->fo_mtime.tv_nsec))
+				events |= FILE_MODIFIED;
+
+			if (pfp->pfop_events & FILE_ATTRIB &&
+			    (fobj32->fo_ctime.tv_sec ||
+			    fobj32->fo_ctime.tv_nsec) &&
+			    (vatt.va_ctime.tv_sec != fobj32->fo_ctime.tv_sec ||
+			    vatt.va_ctime.tv_nsec != fobj32->fo_ctime.tv_nsec))
+				events |= FILE_ATTRIB;
+#endif /* _SYSCALL32_IMPL */
+		}
+
+		/*
+		 * No events to deliver
+		 */
+		if (events == 0) {
+			mutex_exit(&pvp->pvp_mutex);
+			return;
+		}
+
+		/*
+		 * Deliver the event now.
+		 */
+		pkevp = pfp->pfop_pev;
+		pfp->pfop_flags &= ~PORT_FOP_ACTIVE;
+		pkevp->portkev_events |= events;
+		/*
+		 * Move it to the tail as active once are in the
+		 * begining of the list.
+		 */
+		port_fop_listremove(pvp, pfp);
+		port_fop_listinsert_tail(pvp, pfp);
+		port_send_event(pkevp);
+		pfp->pfop_flags |= PORT_FOP_KEV_ONQ;
+	}
+	mutex_exit(&pvp->pvp_mutex);
+}
+
+/*
+ * Add the event source to the port and return the port source cache pointer.
+ */
+int
+port_fop_associate_source(portfop_cache_t **pfcpp, port_t *pp, int source)
+{
+	portfop_cache_t *pfcp;
+	port_source_t	*pse;
+	int		error;
+
+	/*
+	 * associate PORT_SOURCE_FILE source with the port, if it is
+	 * not associated yet. Note the PORT_SOURCE_FILE source is
+	 * associated once and will not be dissociated.
+	 */
+	if ((pse = port_getsrc(pp, PORT_SOURCE_FILE)) == NULL) {
+		if (error = port_associate_ksource(pp->port_fd, source,
+		    &pse, port_close_fop, pp, NULL)) {
+			*pfcpp = NULL;
+			return (error);
+		}
+	}
+
+	/*
+	 * Get the portfop cache pointer.
+	 */
+	if ((pfcp = pse->portsrc_data) == NULL) {
+		/*
+		 * This is the first time that a file is being associated,
+		 * create the portfop cache.
+		 */
+		pfcp = kmem_zalloc(sizeof (portfop_cache_t), KM_SLEEP);
+		mutex_enter(&pp->port_queue.portq_source_mutex);
+		if (pse->portsrc_data == NULL) {
+			pse->portsrc_data = pfcp;
+			mutex_exit(&pp->port_queue.portq_source_mutex);
+		} else {
+			/*
+			 * someone else created the port cache, free
+			 * what we just now allocated.
+			 */
+			mutex_exit(&pp->port_queue.portq_source_mutex);
+			kmem_free(pfcp, sizeof (portfop_cache_t));
+			pfcp = pse->portsrc_data;
+		}
+	}
+	*pfcpp = pfcp;
+	return (0);
+}
+
+/*
+ * Add the given pvp on the file system's list of vnodes watched.
+ */
+int
+port_fop_pvfsadd(portfop_vp_t *pvp)
+{
+	int error = 0;
+	vnode_t	*vp = pvp->pvp_vp;
+	portfop_vfs_hash_t *pvfsh;
+	portfop_vfs_t	 *pvfsp;
+	fsem_t		*fsemp;
+
+	pvfsh = PORTFOP_PVFSH(vp->v_vfsp);
+	mutex_enter(&pvfsh->pvfshash_mutex);
+	for (pvfsp = pvfsh->pvfshash_pvfsp; pvfsp &&
+	    pvfsp->pvfs != vp->v_vfsp; pvfsp = pvfsp->pvfs_next)
+		;
+
+	if (!pvfsp) {
+		if ((fsemp = port_fop_fsemop()) != NULL) {
+			if ((error = fsem_install(vp->v_vfsp, fsemp,
+			    vp->v_vfsp, OPUNIQ, NULL, NULL))) {
+				mutex_exit(&pvfsh->pvfshash_mutex);
+				return (error);
+			}
+		} else {
+			mutex_exit(&pvfsh->pvfshash_mutex);
+			return (EINVAL);
+		}
+		pvfsp = kmem_zalloc(sizeof (portfop_vfs_t), KM_SLEEP);
+		pvfsp->pvfs = vp->v_vfsp;
+		list_create(&(pvfsp->pvfs_pvplist), sizeof (portfop_vp_t),
+		    offsetof(portfop_vp_t, pvp_pvfsnode));
+		pvfsp->pvfs_fsemp = fsemp;
+		pvfsp->pvfs_next = pvfsh->pvfshash_pvfsp;
+		pvfsh->pvfshash_pvfsp = pvfsp;
+	}
+
+	/*
+	 * check if an unmount is in progress.
+	 */
+	if (!pvfsp->pvfs_unmount) {
+		/*
+		 * insert the pvp on list.
+		 */
+		pvp->pvp_pvfsp = pvfsp;
+		list_insert_head(&pvfsp->pvfs_pvplist, (void *)pvp);
+	} else {
+		error = EINVAL;
+	}
+	mutex_exit(&pvfsh->pvfshash_mutex);
+	return (error);
+}
+
+/*
+ * Installs the portfop_vp_t data structure on the
+ * vnode. The 'pvp_femp == NULL' indicates it is not
+ * active. The fem hooks have to be installed.
+ * The portfop_vp_t is only freed when the vnode gets freed.
+ */
+void
+port_install_fopdata(vnode_t *vp)
+{
+	portfop_vp_t *npvp;
+
+	npvp = kmem_zalloc(sizeof (*npvp), KM_SLEEP);
+	mutex_init(&npvp->pvp_mutex, NULL, MUTEX_DEFAULT, NULL);
+	list_create(&npvp->pvp_pfoplist, sizeof (portfop_t),
+	    offsetof(portfop_t, pfop_node));
+	npvp->pvp_vp = vp;
+	/*
+	 * If v_fopdata is not null, some other thread beat us to it.
+	 */
+	if (casptr(&vp->v_fopdata, NULL, npvp) != NULL) {
+		mutex_destroy(&npvp->pvp_mutex);
+		list_destroy(&npvp->pvp_pfoplist);
+		kmem_free(npvp, sizeof (*npvp));
+	}
+}
+
+
+/*
+ * Allocate and add a portfop_t to the per port cache. Also add the portfop_t
+ * to the vnode's list. The association is identified by the object pointer
+ * address and pid.
+ */
+int
+port_pfp_setup(portfop_t **pfpp, port_t *pp, vnode_t *vp, portfop_cache_t *pfcp,
+	uintptr_t object, int events, void *user, char *cname, int clen,
+	vnode_t *dvp)
+{
+	portfop_t	*pfp = NULL;
+	port_kevent_t	*pkevp;
+	fem_t		*femp;
+	int		error = 0;
+	portfop_vp_t	*pvp;
+
+
+	/*
+	 * The port cache mutex is held.
+	 */
+	*pfpp  = NULL;
+
+
+	/*
+	 * At this point the fem monitor is installed.
+	 * Allocate a port event structure per vnode association.
+	 */
+	if (pfp == NULL) {
+		if (error = port_alloc_event_local(pp, PORT_SOURCE_FILE,
+		    PORT_ALLOC_CACHED, &pkevp)) {
+			return (error);
+		}
+		pfp = kmem_zalloc(sizeof (portfop_t), KM_SLEEP);
+		pfp->pfop_pev = pkevp;
+	}
+
+	pfp->pfop_vp = vp;
+	pfp->pfop_pid = curproc->p_pid;
+	pfp->pfop_pcache = pfcp;
+	pfp->pfop_pp = pp;
+	pfp->pfop_flags |= PORT_FOP_ACTIVE;
+	pfp->pfop_cname = cname;
+	pfp->pfop_clen = clen;
+	pfp->pfop_dvp = dvp;
+	pfp->pfop_object = object;
+
+	pkevp->portkev_callback = port_fop_callback;
+	pkevp->portkev_arg = pfp;
+	pkevp->portkev_object = object;
+	pkevp->portkev_user = user;
+	pkevp->portkev_events = 0;
+
+	port_pcache_insert(pfcp, pfp);
+
+	/*
+	 * Register a new file events monitor for this file(vnode), if not
+	 * done already.
+	 */
+	if ((pvp = vp->v_fopdata) == NULL) {
+		port_install_fopdata(vp);
+		pvp = vp->v_fopdata;
+	}
+
+	mutex_enter(&pvp->pvp_mutex);
+	/*
+	 * if the vnode does not have the file events hooks, install it.
+	 */
+	if (pvp->pvp_femp == NULL) {
+		if ((femp = port_fop_femop()) != NULL) {
+			if (!(error = fem_install(pfp->pfop_vp, femp,
+			    (void *)vp, OPUNIQ, NULL, NULL))) {
+				pvp->pvp_femp = femp;
+				/*
+				 * add fsem_t hooks to the vfsp and add pvp to
+				 * the list of vnodes for this vfs.
+				 */
+				if (!(error = port_fop_pvfsadd(pvp))) {
+					/*
+					 * Hold a reference to the vnode since
+					 * we successfully installed the hooks.
+					 */
+					VN_HOLD(vp);
+				} else {
+					(void) fem_uninstall(vp, femp, vp);
+					pvp->pvp_femp = NULL;
+				}
+			}
+		} else {
+			error = EINVAL;
+		}
+	}
+
+	if (error) {
+		/*
+		 * pkevp will get freed here.
+		 */
+		port_pcache_remove_fop(pfcp, pfp);
+		mutex_exit(&pvp->pvp_mutex);
+		return (error);
+	}
+
+	/*
+	 * insert the pfp on the vnode's list. After this
+	 * events can get delivered.
+	 */
+	pfp->pfop_events = events;
+	port_fop_listinsert_head(pvp, pfp);
+
+	mutex_exit(&pvp->pvp_mutex);
+	*pfpp = pfp;
+	return (0);
+}
+
+vnode_t *
+port_resolve_vp(vnode_t *vp)
+{
+	vnode_t *rvp;
+	/*
+	 * special case /etc/mnttab, the only mntfs type
+	 * file that can exist.
+	 */
+	if (mntdummyvp && vp->v_vfsp->vfs_fstype == mntfstype) {
+		VN_RELE(vp);
+		vp = mntdummyvp;
+		VN_HOLD(mntdummyvp);
+	}
+
+	/*
+	 * This should take care of lofs mounted fs systems and nfs4
+	 * hardlinks.
+	 */
+	if ((VOP_REALVP(vp, &rvp) == 0) && vp != rvp) {
+		VN_HOLD(rvp);
+		VN_RELE(vp);
+		vp = rvp;
+	}
+	return (vp);
+}
+
+/*
+ * Register a file events watch on the given file associated to the port *pp.
+ *
+ * The association is identified by the object pointer and the pid.
+ * The events argument contains the events to be monitored for.
+ */
+int
+port_associate_fop(port_t *pp, int source, uintptr_t object, int events,
+    void *user)
+{
+	portfop_cache_t	*pfcp;
+	vnode_t		*vp, *dvp;
+	portfop_t	*pfp;
+	int		error = 0;
+	file_obj_t	fobj;
+	void		*objptr;
+	char		*cname;
+	int		clen;
+	int		removing = 0;
+	int		follow;
+
+	/*
+	 * check that events specified are valid.
+	 */
+	if ((events & ~FILE_EVENTS_MASK) != 0)
+		return (EINVAL);
+
+	if (get_udatamodel() == DATAMODEL_NATIVE) {
+		if (copyin((void *)object, &fobj, sizeof (file_obj_t)))
+			return (EFAULT);
+		objptr = (void *)&fobj;
+#ifdef  _SYSCALL32_IMPL
+	} else {
+		file_obj32_t	fobj32;
+		if (copyin((void *)object, &fobj32, sizeof (file_obj32_t)))
+			return (EFAULT);
+		objptr = (void *)&fobj32;
+#endif  /* _SYSCALL32_IMPL */
+	}
+
+	vp = dvp = NULL;
+
+	/*
+	 * findout if we need to follow symbolic links.
+	 */
+	follow = !(events & FILE_NOFOLLOW);
+	events = events & ~FILE_NOFOLLOW;
+
+	/*
+	 * lookup and find the vnode and its directory vnode of the given
+	 * file.
+	 */
+	if ((error = port_fop_getdvp(objptr, &vp, &dvp, &cname, &clen,
+	    follow)) != 0) {
+		return (error);
+	}
+
+	if (dvp != NULL) {
+		dvp = port_resolve_vp(dvp);
+		VN_RELE(dvp);
+	}
+
+	/*
+	 * Not found
+	 */
+	if (vp == NULL) {
+		error = ENOENT;
+		goto errout;
+	}
+
+	vp = port_resolve_vp(vp);
+
+
+	if (vp != NULL && vnevent_support(vp)) {
+		error = ENOTSUP;
+		goto errout;
+	}
+
+	/*
+	 * Associate this source to the port and get the per port
+	 * fop cache pointer. If the source is already associated, it
+	 * will just return the cache pointer.
+	 */
+	if (error = port_fop_associate_source(&pfcp, pp, source)) {
+		goto errout;
+	}
+
+	/*
+	 * Check if there is an existing association of this file.
+	 */
+	mutex_enter(&pfcp->pfc_lock);
+	pfp = port_cache_lookup_fop(pfcp, curproc->p_pid, object);
+
+	/*
+	 * if it is not the same vnode, just discard it.
+	 */
+	if (pfp != NULL && (pfp->pfop_vp != vp || pfp->pfop_dvp != dvp)) {
+		(void) port_remove_fop(pfp, pfcp, 1, NULL);
+		pfp = NULL;
+	}
+
+	if (pfp == NULL) {
+		/*
+		 * Add a new association, save the file name and the
+		 * directory vnode pointer.
+		 */
+		if (error = port_pfp_setup(&pfp, pp, vp, pfcp, object,
+		    events, user, cname, clen, dvp)) {
+			mutex_exit(&pfcp->pfc_lock);
+			goto errout;
+		}
+
+		/*
+		 * File name used, so make sure we don't free it.
+		 */
+		cname = NULL;
+
+		/*
+		 * We need to check if the file was removed after the
+		 * the lookup and before the fem hooks where added. If
+		 * so, return error. The vnode will still exist as we have
+		 * a hold on it.
+		 */
+		if (pfp->pfop_flags & PORT_FOP_ACTIVE &&
+		    !(pfp->pfop_flags & PORT_FOP_REMOVING)) {
+			vnode_t *tvp;
+			int error;
+
+			tvp = NULL;
+			if ((error = port_fop_getdvp(objptr, &tvp, NULL,
+			    NULL, NULL, follow)) == 0) {
+				if (tvp != NULL) {
+					tvp = port_resolve_vp(tvp);
+				}
+			}
+			if (error || tvp == NULL || tvp != vp) {
+
+				/*
+				 * remove the pfp and fem hooks, if pfp still
+				 * active and it is not being removed from
+				 * the vnode list. This is checked in
+				 * port_remove_fop with the vnode lock held.
+				 */
+				if (port_remove_fop(pfp, pfcp, 0, NULL)) {
+					/*
+					 * the pfp was removed, means no
+					 * events where queued. Report the
+					 * error now.
+					 */
+					error = EINVAL;
+					if (tvp != NULL)
+						VN_RELE(tvp);
+					mutex_exit(&pfcp->pfc_lock);
+					goto errout;
+				}
+			} else {
+				VN_RELE(tvp);
+			}
+		}
+	} else {
+		portfop_vp_t	*pvp = vp->v_fopdata;
+
+		/*
+		 * Re-association of the object.
+		 */
+		mutex_enter(&pvp->pvp_mutex);
+
+		/*
+		 * remove any queued up event.
+		 */
+		if (port_remove_done_event(pfp->pfop_pev)) {
+			pfp->pfop_flags &= ~PORT_FOP_KEV_ONQ;
+		}
+
+		/*
+		 * set new events to watch.
+		 */
+		pfp->pfop_events = events;
+
+		/*
+		 * check if this pfp is being removed. Port_fop_excep()
+		 * will deliver an exception event.
+		 */
+		if (pfp->pfop_flags & PORT_FOP_REMOVING) {
+			removing  = 1;
+		}
+
+		/*
+		 * If not active, mark it active even if it is being
+		 * removed. Then it can send an exception event.
+		 *
+		 * Move it to the head, as the active ones are only
+		 * in the begining. If removing, the pfp will be on
+		 * a temporary list, no need to move it to the front
+		 * all the entries will be processed.
+		 */
+		if (!(pfp->pfop_flags & PORT_FOP_ACTIVE)) {
+			pfp->pfop_flags |= PORT_FOP_ACTIVE;
+			if (!removing) {
+				pvp = (portfop_vp_t *)vp->v_fopdata;
+				port_fop_listremove(pvp, pfp);
+				port_fop_listinsert_head(pvp, pfp);
+			}
+		}
+		mutex_exit(&pvp->pvp_mutex);
+	}
+
+
+	/*
+	 * compare time stamps and deliver events. The pfp cannot
+	 * dissappear since we are holding the cache lock.
+	 */
+	if (!removing && vp->v_type != VFIFO) {
+		port_check_timestamp(vp, pfp, objptr);
+	}
+
+	mutex_exit(&pfcp->pfc_lock);
+	error = 0;
+
+	/*
+	 *  If we have too many watches on the vnode, discard an
+	 *  inactive watch.
+	 */
+	port_fop_trimpfplist(vp);
+
+errout:
+	/*
+	 * Release the hold acquired due to the lookup operation.
+	 */
+	if (vp != NULL)
+		VN_RELE(vp);
+
+	/*
+	 * copied file name not used, free it.
+	 */
+	if (cname != NULL) {
+		kmem_free(cname, clen + 1);
+	}
+	return (error);
+}
+
+
+/*
+ * The port_dissociate_fop() function dissociates the file object
+ * from the event port and removes any events that are already on the queue.
+ * Only the owner of the association is allowed to dissociate the file from
+ * the port. Returns  success (0) if it was found and removed. Otherwise
+ * ENOENT.
+ */
+int
+port_dissociate_fop(port_t *pp, uintptr_t object)
+{
+	portfop_cache_t	*pfcp;
+	portfop_t	*pfp;
+	port_source_t	*pse;
+	int		active = 0;
+
+	pse = port_getsrc(pp, PORT_SOURCE_FILE);
+
+	/*
+	 * if this source is not associated or if there is no
+	 * cache, nothing to do just return.
+	 */
+	if (pse == NULL ||
+	    (pfcp = (portfop_cache_t *)pse->portsrc_data) == NULL)
+		return (EINVAL);
+
+	/*
+	 * Check if this object is on the cache. Only the owner pid
+	 * is allowed to dissociate.
+	 */
+	mutex_enter(&pfcp->pfc_lock);
+	pfp = port_cache_lookup_fop(pfcp, curproc->p_pid, object);
+	if (pfp == NULL) {
+		mutex_exit(&pfcp->pfc_lock);
+		return (ENOENT);
+	}
+
+	/*
+	 * If this was the last association, it will release
+	 * the hold on the vnode. There is a race condition where
+	 * the the pfp is being removed due to an exception event
+	 * in port_fop_sendevent()->port_fop_excep() and port_remove_fop().
+	 * Since port source cache lock is held, port_fop_excep() cannot
+	 * complete. And the vnode itself will not dissapear as long pfp's
+	 * have a reference.
+	 */
+	(void) port_remove_fop(pfp, pfcp, 1, &active);
+	mutex_exit(&pfcp->pfc_lock);
+	return (active ? 0 : ENOENT);
+}
+
+
+/*
+ * port_close() calls this function to request the PORT_SOURCE_FILE source
+ * to remove/free all resources allocated and associated with the port.
+ */
+
+/* ARGSUSED */
+static void
+port_close_fop(void *arg, int port, pid_t pid, int lastclose)
+{
+	port_t		*pp = arg;
+	portfop_cache_t	*pfcp;
+	portfop_t	**hashtbl;
+	portfop_t	*pfp;
+	portfop_t	*pfpnext;
+	int		index;
+	port_source_t	*pse;
+
+
+	pse = port_getsrc(pp, PORT_SOURCE_FILE);
+
+	/*
+	 * No source or no cache, nothing to do.
+	 */
+	if (pse == NULL ||
+	    (pfcp = (portfop_cache_t *)pse->portsrc_data) == NULL)
+		return;
+	/*
+	 * Scan the cache and free all allocated portfop_t and port_kevent_t
+	 * structures of this pid.
+	 */
+	mutex_enter(&pfcp->pfc_lock);
+	hashtbl = (portfop_t **)pfcp->pfc_hash;
+	for (index = 0; index < PORTFOP_HASHSIZE; index++) {
+		for (pfp = hashtbl[index]; pfp != NULL; pfp = pfpnext) {
+			pfpnext = pfp->pfop_hashnext;
+			if (pid == pfp->pfop_pid) {
+				(void) port_remove_fop(pfp, pfcp, 1, NULL);
+			}
+		}
+	}
+
+	/*
+	 * Due to a race between port_close_fop() and port_fop()
+	 * trying to remove the pfp's from the port's cache, it is
+	 * possible that some pfp's are still in the process of being
+	 * freed so we wait.
+	 */
+	while (lastclose && pfcp->pfc_objcount) {
+		(void) cv_wait_sig(&pfcp->pfc_lclosecv, &pfcp->pfc_lock);
+	}
+	mutex_exit(&pfcp->pfc_lock);
+	/*
+	 * last close, free the cache.
+	 */
+	if (lastclose) {
+		ASSERT(pfcp->pfc_objcount == 0);
+		pse->portsrc_data = NULL;
+		kmem_free(pfcp, sizeof (portfop_cache_t));
+	}
+}
+
+/*
+ * Given the list of associations(watches), it will send exception events,
+ * if still active, and discard them. The exception events are handled
+ * seperately because, the pfp needs to be removed from the port cache and
+ * freed as the vnode's identity is changing or being removed. To remove
+ * the pfp from the port's cache, we need to hold the cache lock (pfc_lock).
+ * The lock order is pfc_lock -> pvp_mutex(vnode's) mutex and that is why
+ * the cache's lock cannot be acquired in port_fop_sendevent().
+ */
+static void
+port_fop_excep(list_t *tlist, int op)
+{
+	portfop_t	*pfp;
+	portfop_cache_t *pfcp;
+	port_t	*pp;
+	port_kevent_t	*pkevp;
+	int		error = 0;
+
+	while (pfp = (portfop_t *)list_head(tlist)) {
+		int removed = 0;
+		/*
+		 * remove from the temp list. Since PORT_FOP_REMOVING is
+		 * set, no other thread should attempt to perform a
+		 * list_remove on this pfp.
+		 */
+		list_remove(tlist, pfp);
+
+		pfcp = pfp->pfop_pcache;
+		mutex_enter(&pfcp->pfc_lock);
+
+		/*
+		 * Remove the event from the port queue if it was queued up.
+		 * No need to clear the PORT_FOP_KEV_ONQ flag as this pfp is
+		 * no longer on the vnode's list.
+		 */
+		if ((pfp->pfop_flags & PORT_FOP_KEV_ONQ)) {
+			removed = port_remove_done_event(pfp->pfop_pev);
+		}
+
+		/*
+		 * If still active or the event was queued up and
+		 * had not been collected yet, send an EXCEPTION event.
+		 */
+		if (pfp->pfop_flags & (PORT_FOP_ACTIVE) || removed) {
+			pp = pfp->pfop_pp;
+			/*
+			 * Allocate a port_kevent_t non cached to send this
+			 * event since we will be de-registering.
+			 * The port_kevent_t cannot be pointing back to the
+			 * pfp anymore.
+			 */
+			pfp->pfop_flags &= ~PORT_FOP_ACTIVE;
+			error = port_alloc_event_local(pp, PORT_SOURCE_FILE,
+			    PORT_ALLOC_DEFAULT, &pkevp);
+			if (!error) {
+
+				pkevp->portkev_callback = port_fop_callback;
+				pkevp->portkev_arg = NULL;
+				pkevp->portkev_object =
+				    pfp->pfop_pev->portkev_object;
+				pkevp->portkev_user =
+				    pfp->pfop_pev->portkev_user;
+				/*
+				 * Copy the pid of the watching process.
+				 */
+				pkevp->portkev_pid =
+				    pfp->pfop_pev->portkev_pid;
+				pkevp->portkev_events = op;
+				port_send_event(pkevp);
+			}
+		}
+		/*
+		 * At this point the pfp has been removed from the vnode's
+		 * list its cached port_kevent_t is not on the done queue.
+		 * Remove the pfp and free it from the cache.
+		 */
+		port_pcache_remove_fop(pfcp, pfp);
+		mutex_exit(&pfcp->pfc_lock);
+	}
+}
+
+/*
+ * Send the file events to all of the processes watching this
+ * vnode. In case of hard links, the directory vnode pointer and
+ * the file name are compared. If the names match, then the specified
+ * event is sent or else, the FILE_ATTRIB event is sent, This is the
+ * documented behavior.
+ */
+void
+port_fop_sendevent(vnode_t *vp, int events, vnode_t *dvp, char *cname)
+{
+	port_kevent_t	*pkevp;
+	portfop_t	*pfp, *npfp;
+	portfop_vp_t	*pvp;
+	list_t		tmplist;
+	int		removeall = 0;
+
+	pvp = (portfop_vp_t *)vp->v_fopdata;
+	mutex_enter(&pvp->pvp_mutex);
+
+	/*
+	 * Check if the list is empty.
+	 *
+	 * All entries have been removed by some other thread.
+	 * The vnode may be still active and we got called,
+	 * but some other thread is in the process of removing the hooks.
+	 */
+	if (!list_head(&pvp->pvp_pfoplist)) {
+		mutex_exit(&pvp->pvp_mutex);
+		return;
+	}
+
+	if ((events & (FILE_EXCEPTION))) {
+		/*
+		 * If it is an event for which we are going to remove
+		 * the watches so just move it a temporary list and
+		 * release this vnode.
+		 */
+		list_create(&tmplist, sizeof (portfop_t),
+		    offsetof(portfop_t, pfop_node));
+
+		/*
+		 * If it is an UNMOUNT, MOUNTEDOVER or no file name has been
+		 * passed for an exception event, all associations need to be
+		 * removed.
+		 */
+		if (dvp == NULL || cname == NULL) {
+			removeall = 1;
+		}
+	}
+
+	if (!removeall) {
+		/*
+		 * All the active ones are in the begining of the list.
+		 */
+		for (pfp = (portfop_t *)list_head(&pvp->pvp_pfoplist);
+		    pfp && pfp->pfop_flags & PORT_FOP_ACTIVE; pfp = npfp) {
+			int levents = events;
+
+			npfp = list_next(&pvp->pvp_pfoplist, pfp);
+			/*
+			 * Hard links case - If the file is being
+			 * removed/renamed, and the name matches
+			 * the watched file, then it is an EXCEPTION
+			 * event or else it will be just a FILE_ATTRIB.
+			 */
+			if ((events & (FILE_EXCEPTION))) {
+				ASSERT(dvp != NULL && cname != NULL);
+				if (pfp->pfop_dvp == NULL ||
+				    (pfp->pfop_dvp == dvp &&
+				    (strcmp(cname, pfp->pfop_cname) == 0))) {
+					/*
+					 * It is an exception event, move it
+					 * to temp list and process it later.
+					 * Note we don't set the pfp->pfop_vp
+					 * to NULL even thought it has been
+					 * removed from the vnode's list. This
+					 * pointer is referenced in
+					 * port_remove_fop(). The vnode it
+					 * self cannot dissapear until this
+					 * pfp gets removed and freed.
+					 */
+					port_fop_listremove(pvp, pfp);
+					list_insert_tail(&tmplist, (void *)pfp);
+					pfp->pfop_flags  |= PORT_FOP_REMOVING;
+					continue;
+				} else {
+					levents = FILE_ATTRIB;
+				}
+
+			}
+
+			if (pfp->pfop_events & levents) {
+				/*
+				 * deactivate and move it to the tail.
+				 * If the pfp was active, it cannot be
+				 * on the port's done queue.
+				 */
+				pfp->pfop_flags &= ~PORT_FOP_ACTIVE;
+				port_fop_listremove(pvp, pfp);
+				port_fop_listinsert_tail(pvp, pfp);
+
+				pkevp = pfp->pfop_pev;
+				pkevp->portkev_events |=
+				    (levents & pfp->pfop_events);
+				port_send_event(pkevp);
+				pfp->pfop_flags |= PORT_FOP_KEV_ONQ;
+			}
+		}
+	}
+
+
+	if ((events & (FILE_EXCEPTION))) {
+		if (!removeall) {
+			/*
+			 * Check the inactive associations and remove them if
+			 * the file name matches.
+			 */
+			for (; pfp; pfp = npfp) {
+				npfp = list_next(&pvp->pvp_pfoplist, pfp);
+				if (dvp == NULL || cname == NULL ||
+				    pfp->pfop_dvp == NULL ||
+				    (pfp->pfop_dvp == dvp &&
+				    (strcmp(cname, pfp->pfop_cname) == 0))) {
+					port_fop_listremove(pvp, pfp);
+					list_insert_tail(&tmplist, (void *)pfp);
+					pfp->pfop_flags  |= PORT_FOP_REMOVING;
+				}
+			}
+		} else {
+			/*
+			 * Can be optimized to avoid two pass over this list
+			 * by having a flag in the vnode's portfop_vp_t
+			 * structure to indicate that it is going away,
+			 * Or keep the list short by reusing inactive watches.
+			 */
+			port_fop_listmove(pvp, &tmplist);
+			for (pfp = (portfop_t *)list_head(&tmplist);
+			    pfp; pfp = list_next(&tmplist, pfp)) {
+				pfp->pfop_flags |= PORT_FOP_REMOVING;
+			}
+		}
+
+		/*
+		 * Uninstall the fem hooks if there are no more associations.
+		 * This will release the pvp mutex.
+		 *
+		 * Even thought all entries may have been removed,
+		 * the vnode itself cannot disappear as there will be a
+		 * hold on it due to this call to port_fop_sendevent. This is
+		 * important to syncronize with a port_dissociate_fop() call
+		 * that may be attempting to remove an object from the vnode's.
+		 */
+		port_fop_femuninstall(vp);
+
+		/*
+		 * Send exception events and discard the watch entries.
+		 */
+		port_fop_excep(&tmplist, events);
+		list_destroy(&tmplist);
+
+	} else {
+		mutex_exit(&pvp->pvp_mutex);
+
+		/*
+		 * contain the list size.
+		 */
+		port_fop_trimpfplist(vp);
+	}
+}
+
+/*
+ * Given the file operation, map it to the events types and send.
+ */
+void
+port_fop(vnode_t *vp, int op, int retval)
+{
+	int event = 0;
+	/*
+	 * deliver events only if the operation was successful.
+	 */
+	if (retval)
+		return;
+
+	/*
+	 * These events occuring on the watched file.
+	 */
+	if (op & FOP_MODIFIED_MASK) {
+		event  = FILE_MODIFIED;
+	}
+	if (op & FOP_ACCESS_MASK) {
+		event  |= FILE_ACCESS;
+	}
+	if (op & FOP_ATTRIB_MASK) {
+		event  |= FILE_ATTRIB;
+	}
+
+	if (event) {
+		port_fop_sendevent(vp, 	event, NULL, NULL);
+	}
+}
+
+/*
+ * ----- the unmount filesystem op(fsem) hook.
+ */
+int
+port_fop_unmount(fsemarg_t *vf, int flag, cred_t *cr)
+{
+	vfs_t	*vfsp = (vfs_t *)vf->fa_fnode->fn_available;
+	kmutex_t	*mtx;
+	portfop_vfs_t	*pvfsp, **ppvfsp;
+	portfop_vp_t	*pvp;
+	int error;
+
+	mtx = &(portvfs_hash[PORTFOP_PVFSHASH(vfsp)].pvfshash_mutex);
+	ppvfsp = &(portvfs_hash[PORTFOP_PVFSHASH(vfsp)].pvfshash_pvfsp);
+	pvfsp = NULL;
+	mutex_enter(mtx);
+	/*
+	 * since this fsem hook is triggered, tit has to be on
+	 * the hash list.
+	 */
+	for (pvfsp = *ppvfsp; pvfsp->pvfs != vfsp; pvfsp = pvfsp->pvfs_next)
+	;
+
+	/*
+	 * Indicate that the unmount is in process. Don't remove it yet.
+	 * The underlying filesystem unmount routine sets the VFS_UNMOUNTED
+	 * flag on the vfs_t structure. But we call the filesystem unmount
+	 * routine after removing all the file watches for this filesystem,
+	 * otherwise the unmount will fail due to active vnodes.
+	 * Meanwhile setting pvfsp->unmount = 1 will prevent any thread
+	 * attempting to add a file watch.
+	 */
+	pvfsp->pvfs_unmount = 1;
+	mutex_exit(mtx);
+
+	/*
+	 * uninstall the fsem hooks.
+	 */
+	(void) fsem_uninstall(vfsp, (fsem_t *)pvfsp->pvfs_fsemp, vfsp);
+
+	while (pvp = list_head(&pvfsp->pvfs_pvplist)) {
+		list_remove(&pvfsp->pvfs_pvplist, pvp);
+		/*
+		 * This should send an UNMOUNTED event to all the
+		 * watched vnode of this filesystem and uninstall
+		 * the fem hooks. We release the hold on the vnode here
+		 * because port_fop_femuninstall() will not do it if
+		 * unmount is in process.
+		 */
+		port_fop_sendevent(pvp->pvp_vp, UNMOUNTED, NULL, NULL);
+		VN_RELE(pvp->pvp_vp);
+	}
+
+	error = vfsnext_unmount(vf, flag, cr);
+
+	/*
+	 * we free the pvfsp after the unmount has been completed.
+	 */
+	mutex_enter(mtx);
+	for (; *ppvfsp && (*ppvfsp)->pvfs != vfsp;
+	    ppvfsp = &(*ppvfsp)->pvfs_next)
+	;
+
+	/*
+	 * remove and free it.
+	 */
+	ASSERT(list_head(&pvfsp->pvfs_pvplist) == NULL);
+	if (*ppvfsp) {
+		pvfsp = *ppvfsp;
+		*ppvfsp = pvfsp->pvfs_next;
+	}
+	mutex_exit(mtx);
+	kmem_free(pvfsp, sizeof (portfop_vfs_t));
+	return (error);
+}
+
+/*
+ * ------------------------------file op hooks--------------------------
+ * The O_TRUNC operation is caught with the VOP_SETATTR(AT_SIZE) call.
+ */
+static int
+port_fop_open(femarg_t *vf, int mode, cred_t *cr)
+{
+	int		retval;
+	vnode_t		*vp = (vnode_t *)vf->fa_fnode->fn_available;
+
+	retval = vnext_open(vf, mode, cr);
+	port_fop(vp, FOP_FILE_OPEN, retval);
+	return (retval);
+}
+
+static int
+port_fop_write(femarg_t *vf, struct uio *uiop, int ioflag, struct cred *cr,
+    caller_context_t *ct)
+{
+	int		retval;
+	vnode_t		*vp = (vnode_t *)vf->fa_fnode->fn_available;
+
+	retval =  vnext_write(vf, uiop, ioflag, cr, ct);
+	port_fop(vp, FOP_FILE_WRITE, retval);
+	return (retval);
+}
+
+static int
+port_fop_map(femarg_t *vf, offset_t off, struct as *as, caddr_t *addrp,
+    size_t len, uchar_t prot, uchar_t maxport, uint_t flags, cred_t *cr)
+{
+	int		retval;
+	vnode_t		*vp = (vnode_t *)vf->fa_fnode->fn_available;
+
+	retval =  vnext_map(vf, off, as, addrp, len, prot, maxport, flags, cr);
+	port_fop(vp, FOP_FILE_MAP, retval);
+	return (retval);
+}
+
+static int
+port_fop_read(femarg_t *vf, struct uio *uiop, int ioflag, struct cred *cr,
+    caller_context_t *ct)
+{
+	int		retval;
+	vnode_t		*vp = (vnode_t *)vf->fa_fnode->fn_available;
+
+	retval =  vnext_read(vf, uiop, ioflag, cr, ct);
+	port_fop(vp, FOP_FILE_READ, retval);
+	return (retval);
+}
+
+
+/*
+ * AT_SIZE - is for the open(O_TRUNC) case.
+ */
+int
+port_fop_setattr(femarg_t *vf, vattr_t *vap, int flags, cred_t *cr,
+    caller_context_t *ct)
+{
+	int		retval;
+	vnode_t		*vp = (vnode_t *)vf->fa_fnode->fn_available;
+	int		events = 0;
+
+	retval = vnext_setattr(vf, vap, flags, cr, ct);
+	if (vap->va_mask & (AT_SIZE|AT_MTIME)) {
+		events |= FOP_FILE_SETATTR_MTIME;
+	}
+	if (vap->va_mask & AT_ATIME) {
+		events |= FOP_FILE_SETATTR_ATIME;
+	}
+	if (vap->va_mask & (AT_SIZE|AT_CTIME)) {
+		events |= FOP_FILE_SETATTR_CTIME;
+	}
+
+	port_fop(vp, events, retval);
+	return (retval);
+}
+
+int
+port_fop_create(femarg_t *vf, char *name, vattr_t *vap, vcexcl_t excl,
+	int mode, vnode_t **vpp, cred_t *cr, int flag)
+{
+	int		retval, got = 1;
+	vnode_t		*vp = (vnode_t *)vf->fa_fnode->fn_available;
+	vattr_t		vatt, vatt1;
+
+	/*
+	 * If the file already exists, then there will be no change
+	 * to the directory. Therefore, we need to compare the
+	 * modification time of the directory to determine if the
+	 * file was actually created.
+	 */
+	if (VOP_GETATTR(vp, &vatt, 0, CRED())) {
+		got = 0;
+	}
+	retval = vnext_create(vf, name, vap, excl, mode, vpp, cr, flag);
+
+	if (got && !VOP_GETATTR(vp, &vatt1, 0, CRED())) {
+		if ((vatt1.va_mtime.tv_sec > vatt.va_mtime.tv_sec ||
+		    (vatt1.va_mtime.tv_sec = vatt.va_mtime.tv_sec &&
+		    vatt1.va_mtime.tv_nsec > vatt.va_mtime.tv_nsec))) {
+			/*
+			 * File was created.
+			 */
+			port_fop(vp, FOP_FILE_CREATE, retval);
+		}
+	}
+	return (retval);
+}
+
+int
+port_fop_remove(femarg_t *vf, char *nm, cred_t *cr)
+{
+	int		retval;
+	vnode_t		*vp = (vnode_t *)vf->fa_fnode->fn_available;
+
+	retval = vnext_remove(vf, nm, cr);
+	port_fop(vp, FOP_FILE_REMOVE, retval);
+	return (retval);
+}
+
+int
+port_fop_link(femarg_t *vf, vnode_t *svp, char *tnm, cred_t *cr)
+{
+	int		retval;
+	vnode_t		*vp = (vnode_t *)vf->fa_fnode->fn_available;
+
+	retval = vnext_link(vf, svp, tnm, cr);
+	port_fop(vp, FOP_FILE_LINK, retval);
+	return (retval);
+}
+
+/*
+ * Rename operation is allowed only when from and to directories are
+ * on the same filesystem. This is checked in vn_rename().
+ * The target directory is notified thru a VNEVENT by the filesystem
+ * if the source dir != target dir.
+ */
+int
+port_fop_rename(femarg_t *vf, char *snm, vnode_t *tdvp, char *tnm, cred_t *cr)
+{
+	int		retval;
+	vnode_t		*vp = (vnode_t *)vf->fa_fnode->fn_available;
+
+	retval = vnext_rename(vf, snm, tdvp, tnm, cr);
+	port_fop(vp, FOP_FILE_RENAMESRC, retval);
+	return (retval);
+}
+
+int
+port_fop_mkdir(femarg_t *vf, char *dirname, vattr_t *vap, vnode_t **vpp,
+	cred_t *cr)
+{
+	int		retval;
+	vnode_t		*vp = (vnode_t *)vf->fa_fnode->fn_available;
+
+	retval = vnext_mkdir(vf, dirname, vap, vpp, cr);
+	port_fop(vp, FOP_FILE_MKDIR, retval);
+	return (retval);
+}
+
+int
+port_fop_rmdir(femarg_t *vf, char *nm, vnode_t *cdir, cred_t *cr)
+{
+	int		retval;
+	vnode_t		*vp = (vnode_t *)vf->fa_fnode->fn_available;
+
+	retval = vnext_rmdir(vf, nm, cdir, cr);
+	port_fop(vp, FOP_FILE_RMDIR, retval);
+	return (retval);
+}
+
+int
+port_fop_readdir(femarg_t *vf, uio_t *uiop, cred_t *cr, int *eofp)
+{
+	int		retval;
+	vnode_t		*vp = (vnode_t *)vf->fa_fnode->fn_available;
+
+	retval = vnext_readdir(vf, uiop, cr, eofp);
+	port_fop(vp, FOP_FILE_READDIR, retval);
+	return (retval);
+}
+
+int
+port_fop_symlink(femarg_t *vf, char *linkname, vattr_t *vap, char *target,
+	cred_t *cr)
+{
+	int		retval;
+	vnode_t		*vp = (vnode_t *)vf->fa_fnode->fn_available;
+
+	retval = vnext_symlink(vf, linkname, vap, target, cr);
+	port_fop(vp, FOP_FILE_SYMLINK, retval);
+	return (retval);
+}
+
+/*
+ * acl, facl call this.
+ */
+int
+port_fop_setsecattr(femarg_t *vf, vsecattr_t *vsap, int flags, cred_t *cr)
+{
+	int	retval;
+	vnode_t		*vp = (vnode_t *)vf->fa_fnode->fn_available;
+	retval = vnext_setsecattr(vf, vsap, flags, cr);
+	port_fop(vp, FOP_FILE_SETSECATTR, retval);
+	return (retval);
+}
+
+/*
+ * these are events on the watched file/directory
+ */
+int
+port_fop_vnevent(femarg_t *vf, vnevent_t vnevent, vnode_t *dvp, char *name)
+{
+	vnode_t		*vp = (vnode_t *)vf->fa_fnode->fn_available;
+
+
+	switch (vnevent) {
+	case	VE_RENAME_SRC:
+			port_fop_sendevent(vp, FILE_RENAME_FROM, dvp, name);
+		break;
+	case	VE_RENAME_DEST:
+			port_fop_sendevent(vp, FILE_RENAME_TO, dvp, name);
+		break;
+	case	VE_REMOVE:
+			port_fop_sendevent(vp, FILE_DELETE, dvp, name);
+		break;
+	case	VE_RMDIR:
+			port_fop_sendevent(vp, FILE_DELETE, dvp, name);
+		break;
+	case	VE_CREATE:
+			port_fop_sendevent(vp, FILE_MODIFIED|FILE_ATTRIB,
+			    NULL, NULL);
+		break;
+	case	VE_LINK:
+			port_fop_sendevent(vp, FILE_ATTRIB, NULL, NULL);
+		break;
+
+	case	VE_RENAME_DEST_DIR:
+			port_fop_sendevent(vp, FILE_MODIFIED|FILE_ATTRIB,
+			    NULL, NULL);
+		break;
+
+	case	VE_MOUNTEDOVER:
+			port_fop_sendevent(vp, MOUNTEDOVER, NULL, NULL);
+		break;
+	default:
+		break;
+	}
+	return (vnext_vnevent(vf, vnevent, dvp, name));
+}
diff --git a/usr/src/uts/common/fs/tmpfs/tmp_dir.c b/usr/src/uts/common/fs/tmpfs/tmp_dir.c
index de405078c3..6e2aed9e97 100644
--- a/usr/src/uts/common/fs/tmpfs/tmp_dir.c
+++ b/usr/src/uts/common/fs/tmpfs/tmp_dir.c
@@ -2,9 +2,8 @@
  * CDDL HEADER START
  *
  * The contents of this file are subject to the terms of the
- * Common Development and Distribution License, Version 1.0 only
- * (the "License").  You may not use this file except in compliance
- * with the License.
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
  *
  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  * or http://www.opensolaris.org/os/licensing.
@@ -20,7 +19,7 @@
  * CDDL HEADER END
  */
 /*
- * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
+ * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
@@ -345,8 +344,12 @@ tdirenter(
 			error = tdirrename(fromparent, tp,
 			    dir, name, found, tdp, cred);
 			if (error == 0) {
-				vnevent_rename_dest(TNTOV(found));
+				if (found != NULL) {
+					vnevent_rename_dest(TNTOV(found),
+					TNTOV(dir), name);
+				}
 			}
+
 			tmpnode_rele(found);
 			break;
 
@@ -402,9 +405,6 @@ tdirenter(
 		}
 	}
 
-	if ((op == DE_RENAME) && (error == 0)) {
-		vnevent_rename_src(TNTOV(tp));
-	}
 out:
 	if (error && (op == DE_LINK || op == DE_RENAME)) {
 		/*
diff --git a/usr/src/uts/common/fs/tmpfs/tmp_vnops.c b/usr/src/uts/common/fs/tmpfs/tmp_vnops.c
index 8932732a29..c2d921bba9 100644
--- a/usr/src/uts/common/fs/tmpfs/tmp_vnops.c
+++ b/usr/src/uts/common/fs/tmpfs/tmp_vnops.c
@@ -975,6 +975,10 @@ again:
 			}
 			*vpp = newvp;
 		}
+
+		if (error == 0) {
+			vnevent_create(*vpp);
+		}
 		return (0);
 	}
 
@@ -1043,7 +1047,7 @@ tmp_remove(struct vnode *dvp, char *nm, struct cred *cred)
 
 	rw_exit(&tp->tn_rwlock);
 	rw_exit(&parent->tn_rwlock);
-	vnevent_remove(TNTOV(tp));
+	vnevent_remove(TNTOV(tp), dvp, nm);
 	tmpnode_rele(tp);
 
 	TRACE_3(TR_FAC_TMPFS, TR_TMPFS_REMOVE,
@@ -1093,6 +1097,9 @@ tmp_link(struct vnode *dvp, struct vnode *srcvp, char *tnm, struct cred *cred)
 	error = tdirenter(tm, parent, tnm, DE_LINK, (struct tmpnode *)NULL,
 		from, NULL, (struct tmpnode **)NULL, cred);
 	rw_exit(&parent->tn_rwlock);
+	if (error == 0) {
+		vnevent_link(srcvp);
+	}
 	return (error);
 }
 
@@ -1184,6 +1191,15 @@ tmp_rename(
 			error = 0;
 		goto done;
 	}
+	vnevent_rename_src(TNTOV(fromtp), odvp, onm);
+
+	/*
+	 * Notify the target directory if not same as
+	 * source directory.
+	 */
+	if (ndvp != odvp) {
+		vnevent_rename_dest_dir(ndvp);
+	}
 
 	/*
 	 * Unlink from source.
@@ -1338,7 +1354,7 @@ done:
 done1:
 	rw_exit(&self->tn_rwlock);
 	rw_exit(&parent->tn_rwlock);
-	vnevent_rmdir(TNTOV(self));
+	vnevent_rmdir(TNTOV(self), dvp, nm);
 	tmpnode_rele(self);
 
 	return (error);
diff --git a/usr/src/uts/common/fs/udfs/udf_dir.c b/usr/src/uts/common/fs/udfs/udf_dir.c
index d97a80bb40..d470a2588a 100644
--- a/usr/src/uts/common/fs/udfs/udf_dir.c
+++ b/usr/src/uts/common/fs/udfs/udf_dir.c
@@ -2,9 +2,8 @@
  * CDDL HEADER START
  *
  * The contents of this file are subject to the terms of the
- * Common Development and Distribution License, Version 1.0 only
- * (the "License").  You may not use this file except in compliance
- * with the License.
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
  *
  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  * or http://www.opensolaris.org/os/licensing.
@@ -20,7 +19,7 @@
  * CDDL HEADER END
  */
 /*
- * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
+ * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
@@ -556,9 +555,13 @@ out:
 		 */
 		if (err == 0) {
 			if (tip) {
-				vnevent_rename_dest(ITOV(tip));
+				vnevent_rename_dest(ITOV(tip), ITOV(tdp),
+				    namep);
+			}
+
+			if (sdp != tdp) {
+				vnevent_rename_dest_dir(ITOV(tdp));
 			}
-			vnevent_rename_src(ITOV(sip));
 		}
 
 		/*
@@ -849,9 +852,9 @@ out_novfs:
 		 */
 		if (err == 0) {
 			if (op == DR_REMOVE) {
-				vnevent_remove(ITOV(ip));
+				vnevent_remove(ITOV(ip), ITOV(dp), namep);
 			} else if (op == DR_RMDIR) {
-				vnevent_rmdir(ITOV(ip));
+				vnevent_rmdir(ITOV(ip), ITOV(dp), namep);
 			}
 		}
 		VN_RELE(ITOV(ip));
diff --git a/usr/src/uts/common/fs/udfs/udf_vnops.c b/usr/src/uts/common/fs/udfs/udf_vnops.c
index b67d80c394..defbd544f5 100644
--- a/usr/src/uts/common/fs/udfs/udf_vnops.c
+++ b/usr/src/uts/common/fs/udfs/udf_vnops.c
@@ -732,6 +732,7 @@ udf_create(struct vnode *dvp,
 				(void) ud_itrunc(ip, 0, 0, cr);
 				rw_exit(&ip->i_rwlock);
 			}
+			vnevent_create(ITOV(ip));
 		}
 	}
 
@@ -820,6 +821,10 @@ udf_link(struct vnode *tdvp,
 	ITIMES(sip);
 	ITIMES(tdp);
 
+	if (error == 0) {
+		vnevent_link(svp);
+	}
+
 	return (error);
 }
 
@@ -913,6 +918,7 @@ udf_rename(struct vnode *sdvp,
 		rw_exit(&tdp->i_rwlock);
 		goto errout;
 	}
+	vnevent_rename_src(ITOV(sip), sdvp, snm);
 	rw_exit(&tdp->i_rwlock);
 
 	rw_enter(&sdp->i_rwlock, RW_WRITER);
diff --git a/usr/src/uts/common/fs/ufs/ufs_vnops.c b/usr/src/uts/common/fs/ufs/ufs_vnops.c
index fe903b11e9..414aa037c4 100644
--- a/usr/src/uts/common/fs/ufs/ufs_vnops.c
+++ b/usr/src/uts/common/fs/ufs/ufs_vnops.c
@@ -2985,6 +2985,10 @@ again:
 					    cr);
 					rw_exit(&ip->i_rwlock);
 				}
+
+			}
+			if (error == 0) {
+				vnevent_create(ITOV(ip));
 			}
 		}
 	}
@@ -3131,7 +3135,7 @@ retry_remove:
 	if (rmvp != NULL) {
 		/* Only send the event if there were no errors */
 		if (error == 0)
-			vnevent_remove(rmvp);
+			vnevent_remove(rmvp, vp, nm);
 		VN_RELE(rmvp);
 	}
 out:
@@ -3210,6 +3214,10 @@ unlock:
 		TRANS_END_CSYNC(ufsvfsp, error, issync, TOP_LINK, trans_size);
 		ufs_lockfs_end(ulp);
 	}
+
+	if (!error) {
+		vnevent_link(svp);
+	}
 out:
 	return (error);
 }
@@ -3590,14 +3598,22 @@ unlock:
 	 */
 	if (error == 0) {
 		if (tvp != NULL)
-			vnevent_rename_dest(tvp);
+			vnevent_rename_dest(tvp, tdvp, tnm);
+
+		/*
+		 * Notify the target directory of the rename event
+		 * if source and target directories are not same.
+		 */
+		if (sdvp != tdvp)
+			vnevent_rename_dest_dir(tdvp);
+
 		/*
 		 * Note that if ufs_direnter_lr() returned ESAME then
 		 * this event will still be sent.  This isn't expected
 		 * to be a problem for anticipated usage by consumers.
 		 */
 		if (sip != NULL)
-			vnevent_rename_src(ITOV(sip));
+			vnevent_rename_src(ITOV(sip), sdvp, snm);
 	}
 
 	if (tvp != NULL)
@@ -3743,7 +3759,7 @@ retry_rmdir:
 	if (rmvp != NULL) {
 		/* Only send the event if there were no errors */
 		if (error == 0)
-			vnevent_rmdir(rmvp);
+			vnevent_rmdir(rmvp, vp, nm);
 		VN_RELE(rmvp);
 	}
 out:
diff --git a/usr/src/uts/common/fs/vfs.c b/usr/src/uts/common/fs/vfs.c
index c00879da35..9aa6a3f657 100644
--- a/usr/src/uts/common/fs/vfs.c
+++ b/usr/src/uts/common/fs/vfs.c
@@ -138,8 +138,9 @@ int vfshsz = 512;		/* # of heads/locks in vfs hash arrays */
 				/* must be power of 2!	*/
 timespec_t vfs_mnttab_ctime;	/* mnttab created time */
 timespec_t vfs_mnttab_mtime;	/* mnttab last modified time */
-char *vfs_dummyfstype = "\0";
 struct pollhead vfs_pollhd;	/* for mnttab pollers */
+struct vnode *mntdummyvp;	/* Will be set once mntfs is loaded */
+int	mntfstype;		/* will be set once mnt fs is mounted */
 
 /*
  * Table for generic options recognized in the VFS layer and acted
@@ -1437,6 +1438,10 @@ domount(char *fsname, struct mounta *uap, vnode_t *vp, struct cred *credp,
 	vfs_setresource(vfsp, resource);
 	vfs_setmntpoint(vfsp, mountpt);
 
+	/*
+	 * going to mount on this vnode, so notify.
+	 */
+	vnevent_mountedover(vp);
 	error = VFS_MOUNT(vfsp, vp, uap, credp);
 
 	if (uap->flags & MS_RDONLY)
@@ -2634,6 +2639,9 @@ void
 vfs_mnttab_modtimeupd()
 {
 	hrtime_t oldhrt, newhrt;
+	struct uio	uio;
+	struct iovec	iov;
+	char		buf[1];
 
 	ASSERT(RW_WRITE_HELD(&vfslist));
 	oldhrt = ts2hrt(&vfs_mnttab_mtime);
@@ -2649,6 +2657,30 @@ vfs_mnttab_modtimeupd()
 		hrt2ts(newhrt, &vfs_mnttab_mtime);
 	}
 	pollwakeup(&vfs_pollhd, (short)POLLRDBAND);
+
+	if (mntdummyvp != NULL)	{
+		/*
+		 * Make a VOP_WRITE call on the dummy vnode so that any
+		 * module interested in mnttab getting modified could
+		 * intercept this vnode and capture the event.
+		 *
+		 * Pass a dummy uio struct. Nobody should reference the
+		 * buffer. We need to pass a valid uio struct pointer to take
+		 * care of any module intercepting this vnode which could
+		 * attempt to look at it. Currently only the file events
+		 * notification module intercepts this vnode.
+		 */
+		bzero(&uio, sizeof (uio));
+		bzero(&iov, sizeof (iov));
+		iov.iov_base = buf;
+		iov.iov_len = 0;
+		uio.uio_iov = &iov;
+		uio.uio_iovcnt = 1;
+		uio.uio_loffset = 0;
+		uio.uio_segflg = UIO_SYSSPACE;
+		uio.uio_resid = 0;
+		(void) VOP_WRITE(mntdummyvp, &uio, 0, kcred, NULL);
+	}
 }
 
 int
diff --git a/usr/src/uts/common/fs/vnode.c b/usr/src/uts/common/fs/vnode.c
index 7129cfead9..55813947ec 100644
--- a/usr/src/uts/common/fs/vnode.c
+++ b/usr/src/uts/common/fs/vnode.c
@@ -89,6 +89,9 @@ static vopstats_t *vs_templatep;
 /* Kmem cache handle for vsk_anchor_t allocations */
 kmem_cache_t *vsk_anchor_cache;
 
+/* file events cleanup routine */
+extern void free_fopdata(vnode_t *);
+
 /*
  * Root of AVL tree for the kstats associated with vopstats.  Lock protects
  * updates to vsktat_tree.
@@ -1988,10 +1991,10 @@ vn_cache_constructor(void *buf, void *cdrarg, int kmflags)
 	cv_init(&vp->v_cv, NULL, CV_DEFAULT, NULL);
 	rw_init(&vp->v_nbllock, NULL, RW_DEFAULT, NULL);
 	rw_init(&vp->v_mslock, NULL, RW_DEFAULT, NULL);
-
 	vp->v_femhead = NULL;	/* Must be done before vn_reinit() */
 	vp->v_path = NULL;
 	vp->v_mpssdata = NULL;
+	vp->v_fopdata = NULL;
 
 	return (0);
 }
@@ -2058,6 +2061,10 @@ vn_recycle(vnode_t *vp)
 		kmem_free(vp->v_path, strlen(vp->v_path) + 1);
 		vp->v_path = NULL;
 	}
+
+	if (vp->v_fopdata != NULL) {
+		free_fopdata(vp);
+	}
 	vp->v_mpssdata = NULL;
 }
 
@@ -2110,6 +2117,7 @@ vn_alloc(int kmflag)
 
 	if (vp != NULL) {
 		vp->v_femhead = NULL;	/* Must be done before vn_reinit() */
+		vp->v_fopdata = NULL;
 		vn_reinit(vp);
 	}
 
@@ -2138,6 +2146,10 @@ vn_free(vnode_t *vp)
 		kmem_free(vp->v_femhead, sizeof (*(vp->v_femhead)));
 		vp->v_femhead = NULL;
 	}
+
+	if (vp->v_fopdata != NULL) {
+		free_fopdata(vp);
+	}
 	vp->v_mpssdata = NULL;
 	kmem_cache_free(vn_cache, vp);
 }
@@ -2200,43 +2212,79 @@ vnevent_support(vnode_t *vp)
 	if (vp == NULL)
 		return (EINVAL);
 
-	return (VOP_VNEVENT(vp, VE_SUPPORT));
+	return (VOP_VNEVENT(vp, VE_SUPPORT, NULL, NULL));
+}
+
+void
+vnevent_rename_src(vnode_t *vp, vnode_t *dvp, char *name)
+{
+	if (vp == NULL || vp->v_femhead == NULL) {
+		return;
+	}
+	(void) VOP_VNEVENT(vp, VE_RENAME_SRC, dvp, name);
+}
+
+void
+vnevent_rename_dest(vnode_t *vp, vnode_t *dvp, char *name)
+{
+	if (vp == NULL || vp->v_femhead == NULL) {
+		return;
+	}
+	(void) VOP_VNEVENT(vp, VE_RENAME_DEST, dvp, name);
+}
+
+void
+vnevent_rename_dest_dir(vnode_t *vp)
+{
+	if (vp == NULL || vp->v_femhead == NULL) {
+		return;
+	}
+	(void) VOP_VNEVENT(vp, VE_RENAME_DEST_DIR, NULL, NULL);
+}
+
+void
+vnevent_remove(vnode_t *vp, vnode_t *dvp, char *name)
+{
+	if (vp == NULL || vp->v_femhead == NULL) {
+		return;
+	}
+	(void) VOP_VNEVENT(vp, VE_REMOVE, dvp, name);
 }
 
 void
-vnevent_rename_src(vnode_t *vp)
+vnevent_rmdir(vnode_t *vp, vnode_t *dvp, char *name)
 {
 	if (vp == NULL || vp->v_femhead == NULL) {
 		return;
 	}
-	(void) VOP_VNEVENT(vp, VE_RENAME_SRC);
+	(void) VOP_VNEVENT(vp, VE_RMDIR, dvp, name);
 }
 
 void
-vnevent_rename_dest(vnode_t *vp)
+vnevent_create(vnode_t *vp)
 {
 	if (vp == NULL || vp->v_femhead == NULL) {
 		return;
 	}
-	(void) VOP_VNEVENT(vp, VE_RENAME_DEST);
+	(void) VOP_VNEVENT(vp, VE_CREATE, NULL, NULL);
 }
 
 void
-vnevent_remove(vnode_t *vp)
+vnevent_link(vnode_t *vp)
 {
 	if (vp == NULL || vp->v_femhead == NULL) {
 		return;
 	}
-	(void) VOP_VNEVENT(vp, VE_REMOVE);
+	(void) VOP_VNEVENT(vp, VE_LINK, NULL, NULL);
 }
 
 void
-vnevent_rmdir(vnode_t *vp)
+vnevent_mountedover(vnode_t *vp)
 {
 	if (vp == NULL || vp->v_femhead == NULL) {
 		return;
 	}
-	(void) VOP_VNEVENT(vp, VE_RMDIR);
+	(void) VOP_VNEVENT(vp, VE_MOUNTEDOVER, NULL, NULL);
 }
 
 /*
@@ -3558,11 +3606,11 @@ fop_shrlock(
 }
 
 int
-fop_vnevent(vnode_t *vp, vnevent_t vnevent)
+fop_vnevent(vnode_t *vp, vnevent_t vnevent, vnode_t *dvp, char *fnm)
 {
 	int	err;
 
-	err = (*(vp)->v_op->vop_vnevent)(vp, vnevent);
+	err = (*(vp)->v_op->vop_vnevent)(vp, vnevent, dvp, fnm);
 	VOPSTATS_UPDATE(vp, vnevent);
 	return (err);
 }
diff --git a/usr/src/uts/common/fs/zfs/zfs_vnops.c b/usr/src/uts/common/fs/zfs/zfs_vnops.c
index 24b07aa8e1..cd592628d9 100644
--- a/usr/src/uts/common/fs/zfs/zfs_vnops.c
+++ b/usr/src/uts/common/fs/zfs/zfs_vnops.c
@@ -1165,6 +1165,10 @@ top:
 				VN_RELE(ZTOV(zp));
 				goto top;
 			}
+
+			if (error == 0) {
+				vnevent_create(ZTOV(zp));
+			}
 		}
 	}
 out:
@@ -1250,7 +1254,7 @@ top:
 		goto out;
 	}
 
-	vnevent_remove(vp);
+	vnevent_remove(vp, dvp, name);
 
 	dnlc_remove(dvp, name);
 
@@ -1513,7 +1517,7 @@ top:
 		goto out;
 	}
 
-	vnevent_rmdir(vp);
+	vnevent_rmdir(vp, dvp, name);
 
 	/*
 	 * Grab a lock on the directory to make sure that noone is
@@ -2433,9 +2437,17 @@ top:
 		}
 	}
 
-	vnevent_rename_src(ZTOV(szp));
+	vnevent_rename_src(ZTOV(szp), sdvp, snm);
 	if (tzp)
-		vnevent_rename_dest(ZTOV(tzp));
+		vnevent_rename_dest(ZTOV(tzp), tdvp, tnm);
+
+	/*
+	 * notify the target directory if it is not the same
+	 * as source directory.
+	 */
+	if (tdvp != sdvp) {
+		vnevent_rename_dest_dir(tdvp);
+	}
 
 	tx = dmu_tx_create(zfsvfs->z_os);
 	dmu_tx_hold_bonus(tx, szp->z_id);	/* nlink changes */
@@ -2768,6 +2780,10 @@ top:
 
 	zfs_dirent_unlock(dl);
 
+	if (error == 0) {
+		vnevent_link(svp);
+	}
+
 	ZFS_EXIT(zfsvfs);
 	return (error);
 }
@@ -3701,6 +3717,7 @@ const fs_operation_def_t zfs_dvnodeops_template[] = {
 	VOPNAME_PATHCONF,	{ .vop_pathconf = zfs_pathconf },
 	VOPNAME_GETSECATTR,	{ .vop_getsecattr = zfs_getsecattr },
 	VOPNAME_SETSECATTR,	{ .vop_setsecattr = zfs_setsecattr },
+	VOPNAME_VNEVENT, 	{ .vop_vnevent = fs_vnevent_support },
 	NULL,			NULL
 };
 
diff --git a/usr/src/uts/common/nfs/nfs4.h b/usr/src/uts/common/nfs/nfs4.h
index db7814a07c..ef4365b9d0 100644
--- a/usr/src/uts/common/nfs/nfs4.h
+++ b/usr/src/uts/common/nfs/nfs4.h
@@ -919,7 +919,7 @@ extern int deleg_setattr(femarg_t *, vattr_t *, int, cred_t *,
 extern int deleg_space(femarg_t *, int, flock64_t *, int, offset_t, cred_t *,
 		caller_context_t *);
 extern int deleg_setsecattr(femarg_t *, vsecattr_t *, int, cred_t *);
-extern int deleg_vnevent(femarg_t *, vnevent_t);
+extern int deleg_vnevent(femarg_t *, vnevent_t, vnode_t *, char *);
 
 extern void rfs4_mon_hold(void *);
 extern void rfs4_mon_rele(void *);
diff --git a/usr/src/uts/common/os/port_subr.c b/usr/src/uts/common/os/port_subr.c
index 11a701a78a..ab73f2dd61 100644
--- a/usr/src/uts/common/os/port_subr.c
+++ b/usr/src/uts/common/os/port_subr.c
@@ -197,7 +197,7 @@ port_send_event(port_kevent_t *pkevp)
 	 * ports if being polled.
 	 */
 	if (pkevp->portkev_source != PORT_SOURCE_FD &&
-				portq->portq_flags & PORTQ_POLLIN) {
+	    portq->portq_flags & PORTQ_POLLIN) {
 		portq->portq_flags &= ~PORTQ_POLLIN;
 		mutex_exit(&portq->portq_mutex);
 		pollwakeup(&pkevp->portkev_port->port_pollhd, POLLIN);
@@ -390,10 +390,11 @@ port_remove_event_doneq(port_kevent_t *pkevp, port_queue_t *portq)
  * Currently this function is required to cancel a fired event because
  * the application is delivering new association data (see port_associate_fd()).
  */
-void
+int
 port_remove_done_event(port_kevent_t *pkevp)
 {
 	port_queue_t	*portq;
+	int	removed = 0;
 
 	portq = &pkevp->portkev_port->port_queue;
 	mutex_enter(&portq->portq_mutex);
@@ -411,9 +412,11 @@ port_remove_done_event(port_kevent_t *pkevp)
 		}
 		/* now remove event from the port queue */
 		port_remove_event_doneq(pkevp, portq);
+		removed = 1;
 	}
 	port_unblock(portq);
 	mutex_exit(&portq->portq_mutex);
+	return (removed);
 }
 
 /*
@@ -777,3 +780,15 @@ port_dissociate_ksource(int port, int source, port_source_t *ps)
 	releasef(port);
 	return (0);
 }
+
+void
+free_fopdata(vnode_t *vp)
+{
+	portfop_vp_t *pvp;
+	pvp = vp->v_fopdata;
+	ASSERT(pvp->pvp_femp == NULL);
+	mutex_destroy(&pvp->pvp_mutex);
+	list_destroy(&pvp->pvp_pfoplist);
+	kmem_free(pvp, sizeof (*pvp));
+	vp->v_fopdata = NULL;
+}
diff --git a/usr/src/uts/common/sys/fem.h b/usr/src/uts/common/sys/fem.h
index 04afc1466d..2816734291 100644
--- a/usr/src/uts/common/sys/fem.h
+++ b/usr/src/uts/common/sys/fem.h
@@ -233,7 +233,9 @@ struct fem_head {
 			int flag, cred_t *cr);				\
 	int (*femop_shrlock)(femarg_t *vf, int cmd,			\
 			struct shrlock *shr, int flag, cred_t *cr);	\
-	int (*femop_vnevent)(femarg_t *vf, vnevent_t vnevent)	/* NB: No ";" */
+	int (*femop_vnevent)(femarg_t *vf, vnevent_t vnevent,		\
+			vnode_t *dvp, char *cname)
+	/* NB: No ";" */
 
 struct fem {
 	const char *name;
@@ -340,7 +342,8 @@ extern int vnext_getsecattr(femarg_t *vf, vsecattr_t *vsap, int flag,
 			cred_t *cr);
 extern int vnext_shrlock(femarg_t *vf, int cmd, struct shrlock *shr,
 			int flag, cred_t *cr);
-extern int vnext_vnevent(femarg_t *vf, vnevent_t vevent);
+extern int vnext_vnevent(femarg_t *vf, vnevent_t vevent, vnode_t *dvp,
+			char *cname);
 
 extern int vfsnext_mount(fsemarg_t *vf, vnode_t *mvp, struct mounta *uap,
 			cred_t *cr);
diff --git a/usr/src/uts/common/sys/port.h b/usr/src/uts/common/sys/port.h
index a0ed65ffce..ccb0308255 100644
--- a/usr/src/uts/common/sys/port.h
+++ b/usr/src/uts/common/sys/port.h
@@ -20,7 +20,7 @@
  */
 
 /*
- * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
+ * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
@@ -42,6 +42,7 @@ extern "C" {
 #define	PORT_SOURCE_FD		4
 #define	PORT_SOURCE_ALERT	5
 #define	PORT_SOURCE_MQ		6
+#define	PORT_SOURCE_FILE	7
 
 typedef struct port_event {
 	int		portev_events;	/* event data is source specific */
@@ -57,8 +58,24 @@ typedef	struct	port_notify {
 } port_notify_t;
 
 
+typedef struct file_obj {
+	timestruc_t	fo_atime;	/* Access time from stat(2) */
+	timestruc_t	fo_mtime;	/* Modification time from stat(2) */
+	timestruc_t	fo_ctime;	/* Change time from stat(2) */
+	uintptr_t	fo_pad[3];	/* For future expansion */
+	char		*fo_name;	/* Null terminated file name */
+} file_obj_t;
+
 #if defined(_SYSCALL32)
 
+typedef struct file_obj32 {
+	timestruc32_t	fo_atime;	/* Access time got from stat(2) */
+	timestruc32_t	fo_mtime;	/* Modification time from stat(2) */
+	timestruc32_t	fo_ctime;	/* Change time from stat(2) */
+	caddr32_t	fo_pad[3];	/* For future expansion */
+	caddr32_t	fo_name;	/* Null terminated file name */
+} file_obj32_t;
+
 typedef struct port_event32 {
 	int		portev_events;	/* events detected */
 	ushort_t	portev_source;	/* user, timer, aio, etc */
@@ -79,6 +96,45 @@ typedef	struct	port_notify32 {
 #define	PORT_ALERT_UPDATE	0x02
 #define	PORT_ALERT_INVALID	(PORT_ALERT_SET | PORT_ALERT_UPDATE)
 
+/*
+ * PORT_SOURCE_FILE - events
+ */
+
+/*
+ * User watchable file events
+ */
+#define	FILE_ACCESS		0x00000001
+#define	FILE_MODIFIED		0x00000002
+#define	FILE_ATTRIB		0x00000004
+#define	FILE_NOFOLLOW		0x10000000
+
+/*
+ * exception file events
+ */
+
+/*
+ * The watched file..
+ */
+#define	FILE_DELETE		0x00000010
+#define	FILE_RENAME_TO		0x00000020
+#define	FILE_RENAME_FROM	0x00000040
+/*
+ * The filesystem on which the watched file resides got
+ * unmounted.
+ */
+#define	UNMOUNTED		0x20000000
+/*
+ * Some other file/filesystem got mounted over the
+ * watched file/directory.
+ */
+#define	MOUNTEDOVER		0x40000000
+
+/*
+ * Helper type
+ */
+#define	FILE_EXCEPTION		(UNMOUNTED|FILE_DELETE|FILE_RENAME_TO \
+				|FILE_RENAME_FROM|MOUNTEDOVER)
+
 #ifdef	__cplusplus
 }
 #endif
diff --git a/usr/src/uts/common/sys/port_impl.h b/usr/src/uts/common/sys/port_impl.h
index a80e7afc84..e463e47a6e 100644
--- a/usr/src/uts/common/sys/port_impl.h
+++ b/usr/src/uts/common/sys/port_impl.h
@@ -20,7 +20,7 @@
  */
 
 /*
- * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
+ * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
@@ -44,6 +44,7 @@ extern "C" {
 #include <sys/port.h>
 #include <sys/port_kernel.h>
 #include <sys/vnode.h>
+#include <sys/fem.h>
 
 /*
  * port system call codes
@@ -212,6 +213,138 @@ typedef struct portfd {
 	(&(pcp)->pc_hash[((fd) % (pcp)->pc_hashsize)])
 
 /*
+ * PORT_SOURCE_FILE -- File Events Notification sources
+ */
+#define	PORT_FOP_BUCKET(pcp, id) \
+	(portfop_t **)(&(pcp)->pfc_hash[(((ulong_t)id >> 8) & \
+	    (PORTFOP_HASHSIZE - 1))])
+
+/*
+ * This structure is used to register a file object to be watched.
+ *
+ * The pfop_flags are protected by the vnode's pvp_mutex lock.
+ * The pfop list (vnode's list) is protected by the pvp_mutex when it is on
+ * the vnode's list.
+ *
+ * All the rest of the fields are protected by the port's source cache lock
+ * pfcp_lock.
+ */
+typedef struct  portfop {
+	int		pfop_events;
+	int		pfop_flags;	/* above flags. */
+	uintptr_t	pfop_object;	/* object address */
+	vnode_t		*pfop_vp;
+	vnode_t		*pfop_dvp;
+	port_t		*pfop_pp;
+	fem_t		*pfop_fem;
+	list_node_t	pfop_node;	/* list of pfop's per vnode */
+	struct portfop	*pfop_hashnext;	/* hash list */
+	pid_t		pfop_pid;	/* owner of portfop */
+	struct portfop_cache *pfop_pcache;
+	port_kevent_t	*pfop_pev;	/* event pointers */
+	char		*pfop_cname;	/* file component name */
+	int		pfop_clen;
+} portfop_t;
+
+/*
+ * pfop_flags
+ */
+#define		PORT_FOP_ACTIVE		0x1
+#define		PORT_FOP_REMOVING	0x2
+#define		PORT_FOP_KEV_ONQ	0x4
+
+typedef struct portfop_vfs {
+	vfs_t		*pvfs;
+	int		pvfs_unmount;	/* 1 if unmount in progress */
+	list_t		pvfs_pvplist;	/* list of vnodes from */
+	fsem_t		*pvfs_fsemp;
+	struct portfop_vfs *pvfs_next;	/* hash list */
+} portfop_vfs_t;
+
+typedef struct portfop_vfs_hash {
+	kmutex_t	pvfshash_mutex;
+	struct portfop_vfs *pvfshash_pvfsp;
+} portfop_vfs_hash_t;
+
+typedef struct portfop_vp {
+	vnode_t		*pvp_vp;
+	kmutex_t	pvp_mutex;
+	int		pvp_cnt;	/* number of watches */
+	list_t		pvp_pfoplist;
+	list_node_t	pvp_pvfsnode;
+	struct portfop *pvp_lpfop;	/* oldest pfop */
+	fem_t		*pvp_femp;
+	struct portfop_vfs *pvp_pvfsp;
+} portfop_vp_t;
+
+#define	PORTFOP_PVFSHASH_SZ	256
+#define	PORTFOP_PVFSHASH(vfsp)	(((uintptr_t)(vfsp) >> 4) % PORTFOP_PVFSHASH_SZ)
+
+/*
+ * file operations flag.
+ */
+
+/*
+ * PORT_SOURCE_FILE - vnode operations
+ */
+
+#define	FOP_FILE_OPEN		0x00000001
+#define	FOP_FILE_READ		0x00000002
+#define	FOP_FILE_WRITE		0x00000004
+#define	FOP_FILE_MAP		0x00000008
+#define	FOP_FILE_IOCTL		0x00000010
+#define	FOP_FILE_CREATE		0x00000020
+#define	FOP_FILE_MKDIR		0x00000040
+#define	FOP_FILE_SYMLINK	0x00000080
+#define	FOP_FILE_LINK		0x00000100
+#define	FOP_FILE_RENAME		0x00000200
+#define	FOP_FILE_REMOVE		0x00000400
+#define	FOP_FILE_RMDIR		0x00000800
+#define	FOP_FILE_READDIR	0x00001000
+#define	FOP_FILE_RENAMESRC	0x00002000
+#define	FOP_FILE_RENAMEDST	0x00004000
+#define	FOP_FILE_REMOVEFILE	0x00008000
+#define	FOP_FILE_REMOVEDIR	0x00010000
+#define	FOP_FILE_SETSECATTR	0x00020000
+#define	FOP_FILE_SETATTR_ATIME	0x00040000
+#define	FOP_FILE_SETATTR_MTIME	0x00080000
+#define	FOP_FILE_SETATTR_CTIME	0x00100000
+#define	FOP_FILE_LINK_SRC	0x00200000
+
+/*
+ * File modification event.
+ */
+#define	FOP_MODIFIED_MASK	(FOP_FILE_WRITE|FOP_FILE_CREATE \
+				|FOP_FILE_REMOVE|FOP_FILE_LINK \
+				|FOP_FILE_RENAMESRC|FOP_FILE_RENAMEDST \
+				|FOP_FILE_MKDIR|FOP_FILE_RMDIR \
+				|FOP_FILE_SYMLINK|FOP_FILE_SETATTR_MTIME)
+
+/*
+ * File access event
+ */
+#define	FOP_ACCESS_MASK		(FOP_FILE_READ|FOP_FILE_READDIR \
+				|FOP_FILE_MAP|FOP_FILE_SETATTR_ATIME)
+
+/*
+ * File attrib event
+ */
+#define	FOP_ATTRIB_MASK		(FOP_FILE_WRITE|FOP_FILE_CREATE \
+				|FOP_FILE_REMOVE|FOP_FILE_LINK \
+				|FOP_FILE_RENAMESRC|FOP_FILE_RENAMEDST \
+				|FOP_FILE_MKDIR|FOP_FILE_RMDIR \
+				|FOP_FILE_SYMLINK|FOP_FILE_SETATTR_CTIME \
+				|FOP_FILE_LINK_SRC|FOP_FILE_SETSECATTR)
+
+
+/*
+ * valid watchable events
+ */
+#define	FILE_EVENTS_MASK	(FILE_ACCESS|FILE_MODIFIED|FILE_ATTRIB \
+				|FILE_NOFOLLOW)
+/* --- End file events --- */
+
+/*
  * port_kstat_t contains the event port kernel values which are
  * exported to kstat.
  * Currently only the number of active ports is exported.
@@ -223,7 +356,7 @@ typedef struct port_kstat {
 /* misc functions */
 int	port_alloc_event_block(port_t *, int, int, struct port_kevent **);
 void	port_push_eventq(port_queue_t *);
-void	port_remove_done_event(struct port_kevent *);
+int	port_remove_done_event(struct port_kevent *);
 struct	port_kevent *port_get_kevent(list_t *, struct port_kevent *);
 void	port_block(port_queue_t *);
 void	port_unblock(port_queue_t *);
diff --git a/usr/src/uts/common/sys/port_kernel.h b/usr/src/uts/common/sys/port_kernel.h
index bfc65586fc..7456f63573 100644
--- a/usr/src/uts/common/sys/port_kernel.h
+++ b/usr/src/uts/common/sys/port_kernel.h
@@ -20,7 +20,7 @@
  */
 
 /*
- * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
+ * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
@@ -98,12 +98,29 @@ typedef struct port_source {
 	int	portsrc_cnt;		/* # of associations */
 	void	(*portsrc_close)(void *, int, pid_t, int);
 	void	*portsrc_closearg;	/* callback arg */
+	void	*portsrc_data;		/* Private data of source */
 	struct port_source *portsrc_next;
 	struct port_source *portsrc_prev;
 } port_source_t;
 
 
 /*
+ * PORT_SOURCE_FILE cache structure.
+ */
+#define	PORTFOP_HASHSIZE	256	/* cache space for fop events */
+
+/*
+ * One cache for each port that uses PORT_SOURCE_FILE.
+ */
+typedef struct portfop_cache {
+	kmutex_t	pfc_lock;	/* lock to protect cache */
+	kcondvar_t	pfc_lclosecv;	/* last close cv */
+	int		pfc_objcount;	/* track how many file obj are hashed */
+	struct portfop	*pfc_hash[PORTFOP_HASHSIZE]; /* hash table */
+} portfop_cache_t;
+
+/*
+ * PORT_SOURCE_FD cache per port.
  * One cache for each port that uses PORT_SOURCE_FD.
  * pc_lock must be the first element of port_fdcache_t to keep it
  * synchronized with the offset of pc_lock in pollcache_t (see pollrelock()).
@@ -147,6 +164,8 @@ void	port_init_event(port_kevent_t *, uintptr_t, void *,
 int	port_dup_event(port_kevent_t *, port_kevent_t **, int);
 int	port_associate_fd(struct port *, int, uintptr_t, int, void *);
 int	port_dissociate_fd(struct port *, uintptr_t);
+int	port_associate_fop(struct port *, int, uintptr_t, int, void *);
+int	port_dissociate_fop(struct port *, uintptr_t);
 
 /* misc functions */
 void	port_free_event_local(port_kevent_t *, int counter);
diff --git a/usr/src/uts/common/sys/vnode.h b/usr/src/uts/common/sys/vnode.h
index d2494e013e..8eaf4b7fc9 100644
--- a/usr/src/uts/common/sys/vnode.h
+++ b/usr/src/uts/common/sys/vnode.h
@@ -248,6 +248,7 @@ typedef struct vnode {
 	struct vnode	*v_msnext;	/* list of vnodes on an mset */
 	struct vnode	*v_msprev;	/* list of vnodes on an mset */
 	krwlock_t	v_mslock;	/* protects v_mset */
+	void		*v_fopdata;	/* list of file ops event watches */
 } vnode_t;
 
 #define	IS_DEVVP(vp)	\
@@ -465,7 +466,11 @@ typedef enum vnevent	{
 	VE_RENAME_SRC	= 1,	/* Rename, with vnode as source */
 	VE_RENAME_DEST	= 2,	/* Rename, with vnode as target/destination */
 	VE_REMOVE	= 3,	/* Remove of vnode's name */
-	VE_RMDIR	= 4	/* Remove of directory vnode's name */
+	VE_RMDIR	= 4,	/* Remove of directory vnode's name */
+	VE_CREATE	= 5,	/* Create with vnode's name which exists */
+	VE_LINK		= 6, 	/* Link with vnode's name as source */
+	VE_RENAME_DEST_DIR	= 7, 	/* Rename with vnode as target dir */
+	VE_MOUNTEDOVER	= 8 	/* File or Filesystem got mounted over vnode */
 } vnevent_t;
 
 /*
@@ -606,7 +611,8 @@ struct pollhead;
 				int, cred_t *);				\
 	int	(*vop_shrlock)(vnode_t *, int, struct shrlock *,	\
 				int, cred_t *);				\
-	int	(*vop_vnevent)(vnode_t *, vnevent_t)	/* NB: No ";" */
+	int	(*vop_vnevent)(vnode_t *, vnevent_t, vnode_t *, char *)	\
+	/* NB: No ";" */
 
 /*
  * Operations on vnodes.  Note: File systems must never operate directly
@@ -675,7 +681,7 @@ extern void	fop_dispose(vnode_t *, struct page *, int, int, cred_t *);
 extern int	fop_setsecattr(vnode_t *, vsecattr_t *, int, cred_t *);
 extern int	fop_getsecattr(vnode_t *, vsecattr_t *, int, cred_t *);
 extern int	fop_shrlock(vnode_t *, int, struct shrlock *, int, cred_t *);
-extern int	fop_vnevent(vnode_t *, vnevent_t);
+extern int	fop_vnevent(vnode_t *, vnevent_t, vnode_t *, char *);
 
 #endif	/* _KERNEL */
 
@@ -765,8 +771,8 @@ extern int	fop_vnevent(vnode_t *, vnevent_t);
 	fop_setsecattr(vp, vsap, f, cr)
 #define	VOP_SHRLOCK(vp, cmd, shr, f, cr) \
 	fop_shrlock(vp, cmd, shr, f, cr)
-#define	VOP_VNEVENT(vp, vnevent) \
-	fop_vnevent(vp, vnevent)
+#define	VOP_VNEVENT(vp, vnevent, dvp, fnm) \
+	fop_vnevent(vp, vnevent, dvp, fnm)
 
 #define	VOPNAME_OPEN		"open"
 #define	VOPNAME_CLOSE		"close"
@@ -908,10 +914,14 @@ void vn_setpath(vnode_t *rootvp, struct vnode *startvp, struct vnode *vp,
     const char *path, size_t plen);
 
 /* Vnode event notification */
-void	vnevent_rename_src(vnode_t *);
-void	vnevent_rename_dest(vnode_t *);
-void	vnevent_remove(vnode_t *);
-void	vnevent_rmdir(vnode_t *);
+void	vnevent_rename_src(vnode_t *, vnode_t *, char *);
+void	vnevent_rename_dest(vnode_t *, vnode_t *, char *);
+void	vnevent_remove(vnode_t *, vnode_t *, char *);
+void	vnevent_rmdir(vnode_t *, vnode_t *, char *);
+void	vnevent_create(vnode_t *);
+void	vnevent_link(vnode_t *);
+void	vnevent_rename_dest_dir(vnode_t *);
+void	vnevent_mountedover(vnode_t *);
 int	vnevent_support(vnode_t *);
 
 /* Context identification */
diff --git a/usr/src/uts/intel/portfs/Makefile b/usr/src/uts/intel/portfs/Makefile
index 536b845c59..754a7b60b2 100644
--- a/usr/src/uts/intel/portfs/Makefile
+++ b/usr/src/uts/intel/portfs/Makefile
@@ -20,7 +20,7 @@
 #
 #
 # uts/intel/portfs/Makefile
-# Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
+# Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
 # Use is subject to license terms.
 #
 #ident	"%Z%%M%	%I%	%E% SMI"
@@ -35,7 +35,7 @@
 #
 UTSBASE	= ../..
 
-PORTFS_OBJS	+= port.o port_vnops.o port_fd.o
+PORTFS_OBJS	+= port.o port_vnops.o port_fd.o port_fop.o
 
 #
 #	Define the module and object file sets.
diff --git a/usr/src/uts/sparc/portfs/Makefile b/usr/src/uts/sparc/portfs/Makefile
index a15476eada..b08d2828e5 100644
--- a/usr/src/uts/sparc/portfs/Makefile
+++ b/usr/src/uts/sparc/portfs/Makefile
@@ -20,7 +20,7 @@
 #
 #
 # uts/sparc/portfs/Makefile
-# Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
+# Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
 # Use is subject to license terms.
 #
 #ident	"%Z%%M%	%I%	%E% SMI"
@@ -35,7 +35,7 @@
 #
 UTSBASE	= ../..
 
-PORTFS_OBJS	+= port.o port_vnops.o port_fd.o
+PORTFS_OBJS	+= port.o port_vnops.o port_fd.o port_fop.o
 
 #
 #	Define the module and object file sets.