From owner-svn-src-all@freebsd.org Fri Sep 11 12:38:22 2015 Return-Path: Delivered-To: svn-src-all@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id A9D54A01459; Fri, 11 Sep 2015 12:38:22 +0000 (UTC) (envelope-from avg@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 807EB1DC7; Fri, 11 Sep 2015 12:38:22 +0000 (UTC) (envelope-from avg@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.70]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id t8BCcMsr029420; Fri, 11 Sep 2015 12:38:22 GMT (envelope-from avg@FreeBSD.org) Received: (from avg@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id t8BCcMZm029419; Fri, 11 Sep 2015 12:38:22 GMT (envelope-from avg@FreeBSD.org) Message-Id: <201509111238.t8BCcMZm029419@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: avg set sender to avg@FreeBSD.org using -f From: Andriy Gapon Date: Fri, 11 Sep 2015 12:38:22 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-9@freebsd.org Subject: svn commit: r287659 - stable/9/sys/cddl/contrib/opensolaris/uts/common/fs/zfs X-SVN-Group: stable-9 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 11 Sep 2015 12:38:22 -0000 Author: avg Date: Fri Sep 11 12:38:21 2015 New Revision: 287659 URL: https://svnweb.freebsd.org/changeset/base/287659 Log: MFC r286985: try to fix lor between z_teardown_lock and spa_namespace_lock Modified: stable/9/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c Directory Properties: stable/9/sys/ (props changed) stable/9/sys/cddl/contrib/opensolaris/ (props changed) Modified: stable/9/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c ============================================================================== --- stable/9/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c Fri Sep 11 12:37:50 2015 (r287658) +++ stable/9/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c Fri Sep 11 12:38:21 2015 (r287659) @@ -467,6 +467,19 @@ zfs_register_callbacks(vfs_t *vfsp) } /* + * We need to enter pool configuration here, so that we can use + * dsl_prop_get_int_ds() to handle the special nbmand property below. + * dsl_prop_get_integer() can not be used, because it has to acquire + * spa_namespace_lock and we can not do that because we already hold + * z_teardown_lock. The problem is that spa_config_sync() is called + * with spa_namespace_lock held and the function calls ZFS vnode + * operations to write the cache file and thus z_teardown_lock is + * acquired after spa_namespace_lock. + */ + ds = dmu_objset_ds(os); + dsl_pool_config_enter(dmu_objset_pool(os), FTAG); + + /* * nbmand is a special property. It can only be changed at * mount time. * @@ -477,14 +490,9 @@ zfs_register_callbacks(vfs_t *vfsp) nbmand = B_FALSE; } else if (vfs_optionisset(vfsp, MNTOPT_NBMAND, NULL)) { nbmand = B_TRUE; - } else { - char osname[MAXNAMELEN]; - - dmu_objset_name(os, osname); - if (error = dsl_prop_get_integer(osname, "nbmand", &nbmand, - NULL)) { - return (error); - } + } else if (error = dsl_prop_get_int_ds(ds, "nbmand", &nbmand) != 0) { + dsl_pool_config_exit(dmu_objset_pool(os), FTAG); + return (error); } /* @@ -494,8 +502,6 @@ zfs_register_callbacks(vfs_t *vfsp) * the first prop_register(), but I guess I like to go * overboard... */ - ds = dmu_objset_ds(os); - dsl_pool_config_enter(dmu_objset_pool(os), FTAG); error = dsl_prop_register(ds, zfs_prop_to_name(ZFS_PROP_ATIME), atime_changed_cb, zfsvfs); error = error ? error : dsl_prop_register(ds,