--- /dev/null	Mon Aug  5 17:17:02 2019
+++ new/usr/src/lib/smbclnt/libfksmbfs/common/fake_open.c	Mon Aug  5 17:17:02 2019
@@ -0,0 +1,340 @@
+/*
+ * 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 (c) 1988, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright 2017, Joyent, Inc.
+ * Copyright (c) 2011, 2017 by Delphix. All rights reserved.
+ * Copyright 2018 Nexenta Systems, Inc.  All rights reserved.
+ */
+
+/*	Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T	*/
+/*	  All Rights Reserved  	*/
+
+/*
+ * University Copyright- Copyright (c) 1982, 1986, 1988
+ * The Regents of the University of California
+ * All Rights Reserved
+ *
+ * University Acknowledgment- Portions of this document are derived from
+ * software developed by the University of California, Berkeley, and its
+ * contributors.
+ */
+
+/*
+ * Portions of code from both of:
+ *	syscall/open.c
+ *	fs/vnode.c
+ * heavily modified for this use.
+ */
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/t_lock.h>
+#include <sys/errno.h>
+#include <sys/cred.h>
+#include <sys/user.h>
+#include <sys/uio.h>
+#include <sys/file.h>
+#include <sys/pathname.h>
+#include <sys/vfs.h>
+#include <sys/vfs_opreg.h>
+#include <sys/vnode.h>
+#include <sys/rwstlock.h>
+#include <sys/fem.h>
+#include <sys/stat.h>
+#include <sys/mode.h>
+#include <sys/conf.h>
+#include <sys/sysmacros.h>
+#include <sys/cmn_err.h>
+#include <sys/systm.h>
+#include <sys/kmem.h>
+#include <sys/debug.h>
+#include <sys/acl.h>
+#include <sys/nbmlock.h>
+#include <sys/fcntl.h>
+#include <fs/fs_subr.h>
+#include <sys/taskq.h>
+#include <fs/fs_reparse.h>
+#include <sys/time.h>
+
+#include <libfksmbfs.h>
+
+/* close and release */
+int
+vn_close_rele(vnode_t *vp, int flag)
+{
+	int error;
+
+	error = VOP_CLOSE(vp, flag, 0, 0, CRED(), NULL);
+	vn_rele(vp);
+
+	return (error);
+}
+
+/*
+ * Open/create a vnode.
+ * This may be callable by the kernel, the only known use
+ * of user context being that the current user credentials
+ * are used for permissions.  crwhy is defined iff filemode & FCREAT.
+ */
+int
+vn_open(
+	char *pnamep,
+	enum uio_seg seg,
+	int filemode,
+	int createmode,
+	struct vnode **vpp,
+	enum create crwhy,
+	mode_t umask)
+{
+	struct vnode *vp;
+	int mode;
+	int accessflags;
+	int error;
+	int open_done = 0;
+	struct vattr vattr;
+	int estale_retry = 0;
+
+	mode = 0;
+	accessflags = 0;
+	if (filemode & FREAD)
+		mode |= VREAD;
+	if (filemode & (FWRITE|FTRUNC))
+		mode |= VWRITE;
+	if (filemode & (FSEARCH|FEXEC|FXATTRDIROPEN))
+		mode |= VEXEC;
+
+	if (filemode & FAPPEND)
+		accessflags |= V_APPEND;
+
+top:
+	if (filemode & FCREAT) {
+		enum vcexcl excl;
+
+		/*
+		 * Wish to create a file.
+		 */
+		vattr.va_type = VREG;
+		vattr.va_mode = createmode;
+		vattr.va_mask = AT_TYPE|AT_MODE;
+		if (filemode & FTRUNC) {
+			vattr.va_size = 0;
+			vattr.va_mask |= AT_SIZE;
+		}
+		if (filemode & FEXCL)
+			excl = EXCL;
+		else
+			excl = NONEXCL;
+
+		if ((error =
+		    vn_create(pnamep, seg, &vattr, excl, mode, &vp, crwhy,
+		    (filemode & ~(FTRUNC|FEXCL)), umask)) != 0)
+			return (error);
+	} else {
+		/*
+		 * Wish to open a file.  Just look it up.
+		 * Was lookupnameat()
+		 */
+		if ((error = fake_lookup(NULL, pnamep, &vp)) != 0) {
+			if ((error == ESTALE) &&
+			    fs_need_estale_retry(estale_retry++))
+				goto top;
+			return (error);
+		}
+
+		/*
+		 * Want the XATTRDIR under it?
+		 */
+		if (filemode & FXATTRDIROPEN) {
+			vnode_t *xvp = NULL;
+			error = VOP_LOOKUP(vp, NULL, &xvp, NULL,
+			    LOOKUP_XATTR, rootdir, CRED(), NULL,
+			    NULL, NULL);
+			VN_RELE(vp);
+			vp = xvp;
+			/* continue with vp */
+		}
+
+		/*
+		 * Can't write directories, active texts, or
+		 * read-only filesystems.  Can't truncate files
+		 * on which mandatory locking is in effect.
+		 */
+		if (filemode & (FWRITE|FTRUNC)) {
+			if (vp->v_type == VDIR) {
+				error = EISDIR;
+				goto out;
+			}
+		}
+		/*
+		 * Check permissions.
+		 */
+		if (error = VOP_ACCESS(vp, mode, accessflags, CRED(), NULL))
+			goto out;
+		/*
+		 * Require FSEARCH to return a directory.
+		 * Require FEXEC to return a regular file.
+		 */
+		if ((filemode & FSEARCH) && vp->v_type != VDIR) {
+			error = ENOTDIR;
+			goto out;
+		}
+		if ((filemode & FEXEC) && vp->v_type != VREG) {
+			error = ENOEXEC;
+			goto out;
+		}
+	}
+
+	/*
+	 * Do remaining checks for FNOFOLLOW and FNOLINKS.
+	 */
+	if ((filemode & FNOFOLLOW) && vp->v_type == VLNK) {
+		error = ELOOP;
+		goto out;
+	}
+	if (filemode & FNOLINKS) {
+		vattr.va_mask = AT_NLINK;
+		if ((error = VOP_GETATTR(vp, &vattr, 0, CRED(), NULL))) {
+			goto out;
+		}
+		if (vattr.va_nlink != 1) {
+			error = EMLINK;
+			goto out;
+		}
+	}
+
+	/*
+	 * Opening a socket corresponding to the AF_UNIX pathname
+	 * in the filesystem name space is not supported...
+	 */
+	if (vp->v_type == VSOCK) {
+		error = EOPNOTSUPP;
+		goto out;
+	}
+
+	/*
+	 * Do opening protocol.
+	 */
+	error = VOP_OPEN(&vp, filemode, CRED(), NULL);
+	if (error)
+		goto out;
+	open_done = 1;
+
+	/*
+	 * Truncate if required.
+	 */
+	if ((filemode & FTRUNC) && !(filemode & FCREAT)) {
+		vattr.va_size = 0;
+		vattr.va_mask = AT_SIZE;
+		if ((error = VOP_SETATTR(vp, &vattr, 0, CRED(), NULL)) != 0)
+			goto out;
+	}
+out:
+	ASSERT(vp->v_count > 0);
+
+	if (error) {
+		if (open_done) {
+			(void) VOP_CLOSE(vp, filemode, 1, (offset_t)0, CRED(),
+			    NULL);
+			open_done = 0;
+		}
+		VN_RELE(vp);
+	} else
+		*vpp = vp;
+	return (error);
+}
+
+
+/*
+ * Create a vnode (makenode).
+ */
+int
+vn_create(
+	char *pnamep,
+	enum uio_seg seg,
+	struct vattr *vap,
+	enum vcexcl excl,
+	int mode,
+	struct vnode **vpp,
+	enum create why,
+	int flag,
+	mode_t umask)
+{
+	struct vnode *dvp = NULL;	/* ptr to parent dir vnode */
+	char *lastcomp = NULL;
+	int error;
+
+	ASSERT((vap->va_mask & (AT_TYPE|AT_MODE)) == (AT_TYPE|AT_MODE));
+
+	flag &= ~(FNOFOLLOW|FNOLINKS);
+
+	*vpp = NULL;
+
+	/*
+	 * Lookup directory and last component
+	 */
+	error = fake_lookup_dir(pnamep, &dvp, &lastcomp);
+	if (error != 0) {
+		/* dir not found */
+		return (error);
+	}
+
+	/*
+	 * If default ACLs are defined for the directory don't apply the
+	 * umask if umask is passed.
+	 */
+
+	if (umask) {
+		/*
+		 * Apply the umask if no default ACLs...
+		 */
+		vap->va_mode &= ~umask;
+	}
+
+	if (dvp->v_vfsp->vfs_flag & VFS_RDONLY) {
+		error = EROFS;
+		goto out;
+	}
+
+	/*
+	 * Call mkdir() if specified, otherwise create().
+	 */
+	if (why == CRMKDIR) {
+		/*
+		 * N.B., if vn_createat() ever requests
+		 * case-insensitive behavior then it will need
+		 * to be passed to VOP_MKDIR().  VOP_CREATE()
+		 * will already get it via "flag"
+		 */
+		error = VOP_MKDIR(dvp, lastcomp, vap, vpp, CRED(),
+		    NULL, 0, NULL);
+	} else {
+		error = VOP_CREATE(dvp, lastcomp, vap,
+		    excl, mode, vpp, CRED(), flag, NULL, NULL);
+	}
+
+out:
+	if (dvp != NULL)
+		VN_RELE(dvp);
+
+	return (error);
+}
