Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932708AbbEKS1z (ORCPT ); Mon, 11 May 2015 14:27:55 -0400 Received: from zeniv.linux.org.uk ([195.92.253.2]:47263 "EHLO ZenIV.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754977AbbEKSIW (ORCPT ); Mon, 11 May 2015 14:08:22 -0400 From: Al Viro To: Linus Torvalds Cc: Neil Brown , Christoph Hellwig , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: [PATCH v3 061/110] link_path_walk: nd->depth massage, part 10 Date: Mon, 11 May 2015 19:07:21 +0100 Message-Id: <1431367690-5223-61-git-send-email-viro@ZenIV.linux.org.uk> X-Mailer: git-send-email 1.7.7.6 In-Reply-To: <20150511180650.GA4147@ZenIV.linux.org.uk> References: <20150511180650.GA4147@ZenIV.linux.org.uk> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1956 Lines: 63 From: Al Viro Get rid of orig_depth checks in OK: logics. If nd->depth is zero, we had been called from path_init() and we are done. If it is greater than 1, we are not done, whether we'd been called from path_init() or trailing_symlink(). And in case when it's 1, we might have been called from path_init() and reached the end of nested symlink (in which case nd->stack[0].name will point to the rest of pathname and we are not done) or from trailing_symlink(), in which case we are done. Just have trailing_symlink() leave NULL in nd->stack[0].name and use that to discriminate between those cases. Signed-off-by: Al Viro --- fs/namei.c | 17 ++++++++++------- 1 file changed, 10 insertions(+), 7 deletions(-) diff --git a/fs/namei.c b/fs/namei.c index bc6d67e..6febe25 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -1872,13 +1872,15 @@ Err: put_link(nd); return err; OK: - if (unlikely(nd->depth > orig_depth)) { - name = nd->stack[nd->depth - 1].name; - err = walk_component(nd, LOOKUP_FOLLOW); - put_link(nd); - goto Walked; - } - return 0; + if (!nd->depth) /* called from path_init(), done */ + return 0; + name = nd->stack[nd->depth - 1].name; + if (!name) /* called from trailing_symlink(), done */ + return 0; + + err = walk_component(nd, LOOKUP_FOLLOW); + put_link(nd); + goto Walked; } static int path_init(int dfd, const struct filename *name, unsigned int flags, @@ -2014,6 +2016,7 @@ static int trailing_symlink(struct nameidata *nd) nd->flags |= LOOKUP_JUMPED; } nd->inode = nd->path.dentry->d_inode; + nd->stack[0].name = NULL; error = link_path_walk(s, nd); if (unlikely(error)) put_link(nd); -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/