Add VOP_ACCESSX, which can be used to query for newly added V*

permissions, such as VWRITE_ACL.  For a filsystems that don't
implement it, there is a default implementation, which works
as a wrapper around VOP_ACCESS.

Reviewed by:	rwatson@

2 files changed, 20 insertions, 2 deletions

diff --git a/share/man/man9/Makefile b/share/man/man9/Makefile
index 45b5438..7515a20 100644
--- a/share/man/man9/Makefile
+++ b/share/man/man9/Makefile
@@ -1288,6 +1288,7 @@ MLINKS+=vm_page_io.9 vm_page_io_finish.9 \
 MLINKS+=vm_page_wakeup.9 vm_page_busy.9 \
 	vm_page_wakeup.9 vm_page_flash.9
 MLINKS+=vm_page_wire.9 vm_page_unwire.9
+MLINKS+=VOP_ACCESS.9 VOP_ACCESSX.9
 MLINKS+=VOP_ATTRIB.9 VOP_GETATTR.9 \
 	VOP_ATTRIB.9 VOP_SETATTR.9
 MLINKS+=VOP_CREATE.9 VOP_MKDIR.9 \
diff --git a/share/man/man9/VOP_ACCESS.9 b/share/man/man9/VOP_ACCESS.9
index 76073db..ec4046d 100644
--- a/share/man/man9/VOP_ACCESS.9
+++ b/share/man/man9/VOP_ACCESS.9
@@ -29,17 +29,20 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd July 24, 1996
+.Dd May 30, 2009
 .Os
 .Dt VOP_ACCESS 9
 .Sh NAME
-.Nm VOP_ACCESS
+.Nm VOP_ACCESS ,
+.Nm VOP_ACCESSX
 .Nd "check access permissions of a file or Unix domain socket"
 .Sh SYNOPSIS
 .In sys/param.h
 .In sys/vnode.h
 .Ft int
 .Fn VOP_ACCESS "struct vnode *vp" "accmode_t accmode" "struct ucred *cred" "struct thread *td"
+.Ft int
+.Fn VOP_ACCESSX "struct vnode *vp" "accmode_t accmode" "struct ucred *cred" "struct thread *td"
 .Sh DESCRIPTION
 This entry point checks the access permissions of the file against the
 given credentials.
@@ -63,6 +66,20 @@ is a mask which can contain flags described in <sys/vnode.h>, e.g.
 .Dv VWRITE
 or
 .Dv VEXEC .
+For
+.Fn VOP_ACCESS ,
+the only flags that may be set in
+.Fa accmode
+are
+.Dv VEXEC ,
+.Dv VWRITE ,
+.Dv VREAD ,
+.Dv VADMIN
+and
+.Dv VAPPEND .
+To check for other bits, one has to use
+.Fn VOP_ACCESSX
+instead.
 .Sh LOCKS
 The vnode will be locked on entry and should remain locked on return.
 .Sh RETURN VALUES