Message ID | 20221207084309.8499-2-richard@nod.at |
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State | New |
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[2620:137:e000::1:20]) by mx.google.com with ESMTP id v6-20020a170902b7c600b001782a6fbc7csi18289863plz.463.2022.12.07.00.45.08; Wed, 07 Dec 2022 00:45:22 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229546AbiLGInc (ORCPT <rfc822;b08248@gmail.com> + 99 others); Wed, 7 Dec 2022 03:43:32 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39072 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229486AbiLGIna (ORCPT <rfc822;linux-kernel@vger.kernel.org>); Wed, 7 Dec 2022 03:43:30 -0500 Received: from lithops.sigma-star.at (lithops.sigma-star.at [195.201.40.130]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 99751AE6C; Wed, 7 Dec 2022 00:43:27 -0800 (PST) Received: from localhost (localhost [127.0.0.1]) by lithops.sigma-star.at (Postfix) with ESMTP id C919064BA9DB; Wed, 7 Dec 2022 09:43:24 +0100 (CET) Received: from lithops.sigma-star.at ([127.0.0.1]) by localhost (lithops.sigma-star.at [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id eZ5PZuGXfVPK; Wed, 7 Dec 2022 09:43:24 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by lithops.sigma-star.at (Postfix) with ESMTP id 7098F64BA9DA; Wed, 7 Dec 2022 09:43:24 +0100 (CET) Received: from lithops.sigma-star.at ([127.0.0.1]) by localhost (lithops.sigma-star.at [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id qyypJqZOdzsx; Wed, 7 Dec 2022 09:43:24 +0100 (CET) Received: from blindfold.corp.sigma-star.at (unknown [82.150.214.1]) by lithops.sigma-star.at (Postfix) with ESMTPSA id E3AA064BA9B1; Wed, 7 Dec 2022 09:43:23 +0100 (CET) From: Richard Weinberger <richard@nod.at> To: linux-nfs@vger.kernel.org Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, jlayton@kernel.org, chuck.lever@oracle.com, anna@kernel.org, trond.myklebust@hammerspace.com, viro@zeniv.linux.org.uk, raven@themaw.net, chris.chilvers@appsbroker.com, david.young@appsbroker.com, luis.turcitu@appsbroker.com, david@sigma-star.at, benmaynard@google.com, Richard Weinberger <richard@nod.at> Subject: [PATCH 1/3] NFSD: Teach nfsd_mountpoint() auto mounts Date: Wed, 7 Dec 2022 09:43:07 +0100 Message-Id: <20221207084309.8499-2-richard@nod.at> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20221207084309.8499-1-richard@nod.at> References: <20221207084309.8499-1-richard@nod.at> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,SPF_HELO_NONE, T_SPF_PERMERROR autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: <linux-kernel.vger.kernel.org> X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1751544204540917320?= X-GMAIL-MSGID: =?utf-8?q?1751544204540917320?= |
Series |
NFS: NFSD: Allow crossing mounts when re-exporting
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Commit Message
Richard Weinberger
Dec. 7, 2022, 8:43 a.m. UTC
Currently nfsd_mountpoint() tests for mount points using d_mountpoint(),
this works only when a mount point is already uncovered.
In our case the mount point is of type auto mount and can be coverted.
i.e. ->d_automount() was not called.
Using d_managed() nfsd_mountpoint() can test whether a mount point is
either already uncovered or can be uncovered later.
Signed-off-by: Richard Weinberger <richard@nod.at>
---
fs/nfsd/vfs.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index f650afedd67f..157f0df0e93a 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -160,7 +160,7 @@ int nfsd_mountpoint(struct dentry *dentry, struct svc_export *exp) return 1; if (nfsd4_is_junction(dentry)) return 1; - if (d_mountpoint(dentry)) + if (d_managed(dentry)) /* * Might only be a mountpoint in a different namespace, * but we need to check.