1 files changed, 89 insertions, 0 deletions
diff --git a/module/zfs/pathname.c b/module/zfs/pathname.c
new file mode 100644
index 000000000..4ec132066
--- /dev/null
+++ b/module/zfs/pathname.c
@@ -0,0 +1,89 @@
+/*
+ * 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.
+ */
+
+/*	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.
+ */
+
+
+#include <sys/types.h>
+#include <sys/systm.h>
+#include <sys/pathname.h>
+#include <sys/kmem.h>
+
+/*
+ * Pathname utilities.
+ *
+ * In translating file names we copy each argument file
+ * name into a pathname structure where we operate on it.
+ * Each pathname structure can hold "pn_bufsize" characters
+ * including a terminating null, and operations here support
+ * allocating and freeing pathname structures, fetching
+ * strings from user space, getting the next character from
+ * a pathname, combining two pathnames (used in symbolic
+ * link processing), and peeling off the first component
+ * of a pathname.
+ */
+
+/*
+ * Allocate contents of pathname structure.  Structure is typically
+ * an automatic variable in calling routine for convenience.
+ *
+ * May sleep in the call to kmem_alloc() and so must not be called
+ * from interrupt level.
+ */
+void
+pn_alloc(struct pathname *pnp)
+{
+	pn_alloc_sz(pnp, MAXPATHLEN);
+}
+void
+pn_alloc_sz(struct pathname *pnp, size_t sz)
+{
+	pnp->pn_path = pnp->pn_buf = kmem_alloc(sz, KM_SLEEP);
+	pnp->pn_pathlen = 0;
+	pnp->pn_bufsize = sz;
+}
+
+/*
+ * Free pathname resources.
+ */
+void
+pn_free(struct pathname *pnp)
+{
+	/* pn_bufsize is usually MAXPATHLEN, but may not be */
+	kmem_free(pnp->pn_buf, pnp->pn_bufsize);
+	pnp->pn_path = pnp->pn_buf = NULL;
+	pnp->pn_pathlen = pnp->pn_bufsize = 0;
+}