From 5d72d6ed2212efbb74efb0735b66c6b68984f403 Mon Sep 17 00:00:00 2001
From: Joerg Sonnenberger <joerg@dragonflybsd.org>
Date: Tue, 9 Aug 2005 16:53:34 +0000
Subject: [PATCH] Add vn_get_namelen to simplify correct emulation of statfs
 with maximum name length field.

Discussed-with: hmp
---
 sys/kern/vfs_subr.c | 15 ++++++++++++++-
 sys/sys/vnode.h     |  3 ++-
 2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/sys/kern/vfs_subr.c b/sys/kern/vfs_subr.c
index 1b50e4fee0..a595984f96 100644
--- a/sys/kern/vfs_subr.c
+++ b/sys/kern/vfs_subr.c
@@ -37,7 +37,7 @@
  *
  *	@(#)vfs_subr.c	8.31 (Berkeley) 5/26/95
  * $FreeBSD: src/sys/kern/vfs_subr.c,v 1.249.2.30 2003/04/04 20:35:57 tegge Exp $
- * $DragonFly: src/sys/kern/vfs_subr.c,v 1.57 2005/06/06 15:02:28 dillon Exp $
+ * $DragonFly: src/sys/kern/vfs_subr.c,v 1.58 2005/08/09 16:53:34 joerg Exp $
  */
 
 /*
@@ -64,6 +64,7 @@
 #include <sys/stat.h>
 #include <sys/sysctl.h>
 #include <sys/syslog.h>
+#include <sys/unistd.h>
 #include <sys/vmmeter.h>
 #include <sys/vnode.h>
 
@@ -1996,3 +1997,15 @@ assert_vop_unlocked(struct vnode *vp, const char *str)
 }
 
 #endif
+
+int
+vn_get_namelen(struct vnode *vp, int *namelen)
+{
+	int error, retval[2];
+
+	error = VOP_PATHCONF(vp, _PC_NAME_MAX, retval);
+	if (error)
+		return (error);
+	*namelen = *retval;
+	return (0);
+}
diff --git a/sys/sys/vnode.h b/sys/sys/vnode.h
index 9b8def267f..f1e513617b 100644
--- a/sys/sys/vnode.h
+++ b/sys/sys/vnode.h
@@ -32,7 +32,7 @@
  *
  *	@(#)vnode.h	8.7 (Berkeley) 2/4/94
  * $FreeBSD: src/sys/sys/vnode.h,v 1.111.2.19 2002/12/29 18:19:53 dillon Exp $
- * $DragonFly: src/sys/sys/vnode.h,v 1.36 2005/07/27 15:56:18 joerg Exp $
+ * $DragonFly: src/sys/sys/vnode.h,v 1.37 2005/08/09 16:53:34 joerg Exp $
  */
 
 #ifndef _SYS_VNODE_H_
@@ -630,6 +630,7 @@ int	debug_vn_lock (struct vnode *vp, int flags, struct thread *td,
 #define vn_lock(vp,flags,p) debug_vn_lock(vp,flags,p,__FILE__,__LINE__)
 #endif
 
+int	vn_get_namelen(struct vnode *, int *);
 void	vn_setspecops (struct file *fp);
 int	vn_fullpath (struct proc *p, struct vnode *vn, char **retbuf, char **freebuf);
 int	vn_open (struct nlookupdata *ndp, struct file *fp, int fmode, int cmode);
-- 
2.41.0