From mboxrd@z Thu Jan 1 00:00:00 1970 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=-12.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 011B1C6369E for ; Sun, 8 Nov 2020 14:04:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B6B02206F4 for ; Sun, 8 Nov 2020 14:04:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=mykernel.net header.i=cgxu519@mykernel.net header.b="Be8ZJ51p" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728481AbgKHOEG (ORCPT ); Sun, 8 Nov 2020 09:04:06 -0500 Received: from sender2-op-o12.zoho.com.cn ([163.53.93.243]:17152 "EHLO sender2-op-o12.zoho.com.cn" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727570AbgKHOEF (ORCPT ); Sun, 8 Nov 2020 09:04:05 -0500 ARC-Seal: i=1; a=rsa-sha256; t=1604844205; cv=none; d=zoho.com.cn; s=zohoarc; b=BKtvap62UzG0f6dME/cwvpzkz3sDm8w5ma0+sASIdvHQLQ8FA1pJQ7fJETCxYbcHPl+uNOg/azpXM4bf4sddwxtSjJQG3oVhwPprb1wAF9Ty5hXTzQNzp2ve9CwGVPCzwi3kljBIvChoLmT6v7BeYDNLDiyRVBibP51gbYI5alI= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com.cn; s=zohoarc; t=1604844205; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:MIME-Version:Message-ID:References:Subject:To; bh=9en0t344dZx9gFZ3T+wZUNYnBIjQcpi5KhVT7rOuUWw=; b=LzsbXCG9sq5O5PahrLnc/JpVMi7Pq+1fsU95PHy0aQpTHSkTHLONQcOEz1rE6iNVUPrL6andLq5o4DC+ZYov6aEQayYFrUUa0IreOHEb7bVDEu2Hz3Cu2Ig2i7131RsOS0Xt9SfVUJJ3ZqXhQ0MfBnBtYTUUsY5zgVhSvMpX8tI= ARC-Authentication-Results: i=1; mx.zoho.com.cn; dkim=pass header.i=mykernel.net; spf=pass smtp.mailfrom=cgxu519@mykernel.net; dmarc=pass header.from= header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1604844205; s=zohomail; d=mykernel.net; i=cgxu519@mykernel.net; h=From:To:Cc:Message-ID:Subject:Date:In-Reply-To:References:MIME-Version:Content-Transfer-Encoding:Content-Type; bh=9en0t344dZx9gFZ3T+wZUNYnBIjQcpi5KhVT7rOuUWw=; b=Be8ZJ51p7eqMmahS9JGWQYscfllTzS6i8MKXtwSR7UEKw2ozX1pg4ZpbyesV50O9 OdQnXwG6SJRToBWz2n6kycrdmXohRlgkgJsxdXSv/kjrAST90Qw+RfpOiwaEEw1LxkH fXIv0cG5EULG1vGNnrOmNLQXqy46c44d/e8+6dOA= Received: from localhost.localdomain (113.116.49.189 [113.116.49.189]) by mx.zoho.com.cn with SMTPS id 1604844202883136.1258273953929; Sun, 8 Nov 2020 22:03:22 +0800 (CST) From: Chengguang Xu To: miklos@szeredi.hu, jack@suse.cz, amir73il@gmail.com Cc: linux-unionfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, Chengguang Xu Message-ID: <20201108140307.1385745-3-cgxu519@mykernel.net> Subject: [RFC PATCH v3 02/10] ovl: introduce waiting list for syncfs Date: Sun, 8 Nov 2020 22:02:59 +0800 X-Mailer: git-send-email 2.26.2 In-Reply-To: <20201108140307.1385745-1-cgxu519@mykernel.net> References: <20201108140307.1385745-1-cgxu519@mykernel.net> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoCNMailClient: External Content-Type: text/plain; charset=utf8 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Introduce extra waiting list to collect inodes which are in writeback process. Signed-off-by: Chengguang Xu --- fs/overlayfs/ovl_entry.h | 5 +++++ fs/overlayfs/super.c | 4 ++++ 2 files changed, 9 insertions(+) diff --git a/fs/overlayfs/ovl_entry.h b/fs/overlayfs/ovl_entry.h index 1b5a2094df8e..72334662253a 100644 --- a/fs/overlayfs/ovl_entry.h +++ b/fs/overlayfs/ovl_entry.h @@ -79,6 +79,9 @@ struct ovl_fs { =09atomic_long_t last_ino; =09/* Whiteout dentry cache */ =09struct dentry *whiteout; +=09/* syncfs waiting list and lock */ +=09struct list_head syncfs_wait_list; +=09spinlock_t syncfs_wait_list_lock; }; =20 static inline struct vfsmount *ovl_upper_mnt(struct ovl_fs *ofs) @@ -129,6 +132,8 @@ struct ovl_inode { =20 =09/* synchronize copy up and more */ =09struct mutex lock; +=09/* link to ofs->syncfs_wait_list */ +=09struct list_head wait_list; }; =20 static inline struct ovl_inode *OVL_I(struct inode *inode) diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c index d1e546abce87..1e21feb87297 100644 --- a/fs/overlayfs/super.c +++ b/fs/overlayfs/super.c @@ -184,6 +184,7 @@ static struct inode *ovl_alloc_inode(struct super_block= *sb) =09oi->lower =3D NULL; =09oi->lowerdata =3D NULL; =09mutex_init(&oi->lock); +=09INIT_LIST_HEAD(&oi->wait_list); =20 =09return &oi->vfs_inode; } @@ -1869,6 +1870,9 @@ static int ovl_fill_super(struct super_block *sb, voi= d *data, int silent) =09if (!ofs) =09=09goto out; =20 +=09INIT_LIST_HEAD(&ofs->syncfs_wait_list); +=09spin_lock_init(&ofs->syncfs_wait_list_lock); + =09err =3D super_setup_bdi(sb); =09if (err) =09=09goto out_err; --=20 2.26.2