From patchwork Tue Jul 27 22:37:45 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: NeilBrown X-Patchwork-Id: 12404557 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 22B7FC4320E for ; Tue, 27 Jul 2021 22:42:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 108FA60F6D for ; Tue, 27 Jul 2021 22:42:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232827AbhG0Wm5 (ORCPT ); Tue, 27 Jul 2021 18:42:57 -0400 Received: from smtp-out2.suse.de ([195.135.220.29]:53912 "EHLO smtp-out2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232464AbhG0Wm4 (ORCPT ); Tue, 27 Jul 2021 18:42:56 -0400 Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id 538B21FF40; Tue, 27 Jul 2021 22:42:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1627425775; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=BdWc5KqmXjzy1xBY7ficQJMIpIg+XlTLtZTRBW7cd2M=; b=HABFOC4ZUavNpgxB2HVyXBMgaS6Q0CxRT601I6yALwsJ3RFmpKH+40SVn6iVfkZf1j4yxM BLihlT307OKP6/2DXCcW7LJzm60YQefxFR0lZoyIYFqG+PcEW8yrxS2T32HjRXGH3PP/Et /jINM8iA6J1ebllkcAysubXJOvJEdT4= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1627425775; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=BdWc5KqmXjzy1xBY7ficQJMIpIg+XlTLtZTRBW7cd2M=; b=Kh8V08OHt4aWrNeeRMdcdZ6KDLpUOgOCYz8tY0tv+Z9uvMwSrpgqwuLpTEfdbbj7Tkb3BR dMdbzhGJeN7G7mCA== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 5E88413A5D; Tue, 27 Jul 2021 22:42:52 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id ksqPB+yLAGGlVQAAMHmgww (envelope-from ); Tue, 27 Jul 2021 22:42:52 +0000 Subject: [PATCH 03/11] VFS: pass lookup_flags into follow_down() From: NeilBrown To: Christoph Hellwig , Josef Bacik , "J. Bruce Fields" , Chuck Lever , Chris Mason , David Sterba , Alexander Viro Cc: linux-fsdevel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-btrfs@vger.kernel.org Date: Wed, 28 Jul 2021 08:37:45 +1000 Message-ID: <162742546550.32498.10582545131617192944.stgit@noble.brown> In-Reply-To: <162742539595.32498.13687924366155737575.stgit@noble.brown> References: <162742539595.32498.13687924366155737575.stgit@noble.brown> User-Agent: StGit/0.23 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org A future patch will want to trigger automount (LOOKUP_AUTOMOUNT) on some follow_down calls, so allow a flag to be passed. Signed-off-by: NeilBrown --- fs/namei.c | 6 +++--- fs/nfsd/vfs.c | 2 +- include/linux/namei.h | 2 +- 3 files changed, 5 insertions(+), 5 deletions(-) diff --git a/fs/namei.c b/fs/namei.c index bf6d8a738c59..cea0e9b2f162 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -1395,11 +1395,11 @@ EXPORT_SYMBOL(follow_down_one); * point, the filesystem owning that dentry may be queried as to whether the * caller is permitted to proceed or not. */ -int follow_down(struct path *path) +int follow_down(struct path *path, unsigned int lookup_flags) { struct vfsmount *mnt = path->mnt; bool jumped; - int ret = traverse_mounts(path, &jumped, NULL, 0); + int ret = traverse_mounts(path, &jumped, NULL, lookup_flags); if (path->mnt != mnt) mntput(mnt); @@ -2736,7 +2736,7 @@ int path_pts(struct path *path) path->dentry = child; dput(parent); - follow_down(path); + follow_down(path, 0); return 0; } #endif diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index a224a5e23cc1..7c32edcfd2e9 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -65,7 +65,7 @@ nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp, .dentry = dget(dentry)}; int err = 0; - err = follow_down(&path); + err = follow_down(&path, 0); if (err < 0) goto out; if (path.mnt == exp->ex_path.mnt && path.dentry == dentry && diff --git a/include/linux/namei.h b/include/linux/namei.h index be9a2b349ca7..8d47433def3c 100644 --- a/include/linux/namei.h +++ b/include/linux/namei.h @@ -70,7 +70,7 @@ extern struct dentry *lookup_one_len_unlocked(const char *, struct dentry *, int extern struct dentry *lookup_positive_unlocked(const char *, struct dentry *, int); extern int follow_down_one(struct path *); -extern int follow_down(struct path *); +extern int follow_down(struct path *, unsigned int); extern int follow_up(struct path *); extern struct dentry *lock_rename(struct dentry *, struct dentry *);