From patchwork Wed Nov 16 15:17:24 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeff Layton X-Patchwork-Id: 13045403 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 23C0AC4332F for ; Wed, 16 Nov 2022 15:17:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233969AbiKPPRr (ORCPT ); Wed, 16 Nov 2022 10:17:47 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36556 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233697AbiKPPRi (ORCPT ); Wed, 16 Nov 2022 10:17:38 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 801D24FF82; Wed, 16 Nov 2022 07:17:37 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 3C8B5B81DC0; Wed, 16 Nov 2022 15:17:36 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 00854C43470; Wed, 16 Nov 2022 15:17:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1668611854; bh=PD+6nv8c5dN3Wkd3cLoPzM9DTqnWGjUkaCEfb0sQeK0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fYfcY5d4XycDOkE9YDEPcHL4XBS6Ap8sR2ZzFJCTsummRJIZ0VwKrUh8eFbVl87qh 2li0TrJDQzcT+loUKhy4s2X8d22RLz91mNAM74RyY2Kb2dXNqhtIgz1qgxeBJ/96Cr vgpy5dhy/6GCDoRNBTZ5b2vj14wt9VfO1nV+cH7AOHSkWoC+F3R9l9keDQJACmdu5n X64sh7AVDJLaFPxbQGv41HlApD+jcgdNNQ8tovL/65iK4cqkPnGjEDqdFFkLDguLcf rg0x3xWoHqI14NweRpnljW80akrlW6OtvRt95ptLjY08S0memHVrfEEyXvh/h/zJe3 5ANR0oE7ybCBQ== From: Jeff Layton To: linux-fsdevel@vger.kernel.org Cc: linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-cifs@vger.kernel.org, chuck.lever@oracle.com, viro@zeniv.linux.org.uk, hch@lst.de, Trond Myklebust , Anna Schumaker Subject: [PATCH 5/7] lockd: use locks_inode_context helper Date: Wed, 16 Nov 2022 10:17:24 -0500 Message-Id: <20221116151726.129217-6-jlayton@kernel.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221116151726.129217-1-jlayton@kernel.org> References: <20221116151726.129217-1-jlayton@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: ceph-devel@vger.kernel.org lockd currently doesn't access i_flctx safely. This requires a smp_load_acquire, as the pointer is set via cmpxchg (a release operation). Cc: Trond Myklebust Cc: Anna Schumaker Cc: Chuck Lever Signed-off-by: Jeff Layton Reviewed-by: Christoph Hellwig --- fs/lockd/svcsubs.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/lockd/svcsubs.c b/fs/lockd/svcsubs.c index e1c4617de771..720684345817 100644 --- a/fs/lockd/svcsubs.c +++ b/fs/lockd/svcsubs.c @@ -207,7 +207,7 @@ nlm_traverse_locks(struct nlm_host *host, struct nlm_file *file, { struct inode *inode = nlmsvc_file_inode(file); struct file_lock *fl; - struct file_lock_context *flctx = inode->i_flctx; + struct file_lock_context *flctx = locks_inode_context(inode); struct nlm_host *lockhost; if (!flctx || list_empty_careful(&flctx->flc_posix)) @@ -262,7 +262,7 @@ nlm_file_inuse(struct nlm_file *file) { struct inode *inode = nlmsvc_file_inode(file); struct file_lock *fl; - struct file_lock_context *flctx = inode->i_flctx; + struct file_lock_context *flctx = locks_inode_context(inode); if (file->f_count || !list_empty(&file->f_blocks) || file->f_shares) return 1;