From owner-svn-src-user@FreeBSD.ORG Fri May 15 23:11:07 2009 Return-Path: Delivered-To: svn-src-user@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 48A9E1065673; Fri, 15 May 2009 23:11:07 +0000 (UTC) (envelope-from kmacy@FreeBSD.org) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c]) by mx1.freebsd.org (Postfix) with ESMTP id 369148FC23; Fri, 15 May 2009 23:11:07 +0000 (UTC) (envelope-from kmacy@FreeBSD.org) Received: from svn.freebsd.org (localhost [127.0.0.1]) by svn.freebsd.org (8.14.3/8.14.3) with ESMTP id n4FNB7gF037435; Fri, 15 May 2009 23:11:07 GMT (envelope-from kmacy@svn.freebsd.org) Received: (from kmacy@localhost) by svn.freebsd.org (8.14.3/8.14.3/Submit) id n4FNB7vA037434; Fri, 15 May 2009 23:11:07 GMT (envelope-from kmacy@svn.freebsd.org) Message-Id: <200905152311.n4FNB7vA037434@svn.freebsd.org> From: Kip Macy Date: Fri, 15 May 2009 23:11:07 +0000 (UTC) To: src-committers@freebsd.org, svn-src-user@freebsd.org X-SVN-Group: user MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cc: Subject: svn commit: r192167 - user/kmacy/ZFS_MFC/sys/cddl/compat/opensolaris/kern X-BeenThere: svn-src-user@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "SVN commit messages for the experimental " user" src tree" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 15 May 2009 23:11:07 -0000 Author: kmacy Date: Fri May 15 23:11:06 2009 New Revision: 192167 URL: http://svn.freebsd.org/changeset/base/192167 Log: consolidate lookup functions Added: user/kmacy/ZFS_MFC/sys/cddl/compat/opensolaris/kern/opensolaris_lookup.c (contents, props changed) Added: user/kmacy/ZFS_MFC/sys/cddl/compat/opensolaris/kern/opensolaris_lookup.c ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ user/kmacy/ZFS_MFC/sys/cddl/compat/opensolaris/kern/opensolaris_lookup.c Fri May 15 23:11:06 2009 (r192167) @@ -0,0 +1,111 @@ +/*- + * Copyright (c) 2007 Pawel Jakub Dawidek + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include +__FBSDID("$FreeBSD$"); + +#include +#include +#include +#include +#include +#include + +int +lookupname(char *dirname, enum uio_seg seg, enum symfollow follow, + vnode_t **dirvpp, vnode_t **compvpp) +{ + + return (lookupnameat(dirname, seg, follow, dirvpp, compvpp, NULL)); +} + +int +lookupnameat(char *dirname, enum uio_seg seg, enum symfollow follow, + vnode_t **dirvpp, vnode_t **compvpp, vnode_t *startvp) +{ + struct nameidata nd; + int error, ltype; + + ASSERT(dirvpp == NULL); + + vref(startvp); + ltype = VOP_ISLOCKED(startvp, curthread); + VOP_UNLOCK(startvp, 0, curthread); + NDINIT_ATVP(&nd, LOOKUP, LOCKLEAF | MPSAFE | follow, seg, dirname, + startvp, curthread); + error = namei(&nd); + *compvpp = nd.ni_vp; + NDFREE(&nd, NDF_ONLY_PNBUF); + vn_lock(startvp, ltype | LK_RETRY, curthread); + return (error); +} + +int +traverse(vnode_t **cvpp, int lktype) +{ + vnode_t *cvp; + vnode_t *tvp; + vfs_t *vfsp; + int error; + + cvp = *cvpp; + tvp = NULL; + + /* + * If this vnode is mounted on, then we transparently indirect + * to the vnode which is the root of the mounted file system. + * Before we do this we must check that an unmount is not in + * progress on this vnode. + */ + + for (;;) { + /* + * Reached the end of the mount chain? + */ + vfsp = vn_mountedvfs(cvp); + if (vfsp == NULL) + break; + /* + * tvp is NULL for *cvpp vnode, which we can't unlock. + */ + if (tvp != NULL) + vput(cvp); + else + vrele(cvp); + + /* + * The read lock must be held across the call to VFS_ROOT() to + * prevent a concurrent unmount from destroying the vfs. + */ + error = VFS_ROOT(vfsp, lktype, &tvp, curthread); + if (error != 0) + return (error); + cvp = tvp; + } + + *cvpp = cvp; + return (0); +}