From owner-svn-src-all@freebsd.org Mon Jun 3 19:20:11 2019 Return-Path: Delivered-To: svn-src-all@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 9C6F815BB1AC; Mon, 3 Jun 2019 19:20:11 +0000 (UTC) (envelope-from mav@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 238B76AE88; Mon, 3 Jun 2019 19:20:11 +0000 (UTC) (envelope-from mav@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id EFEEDA712; Mon, 3 Jun 2019 19:20:10 +0000 (UTC) (envelope-from mav@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x53JKAiG095809; Mon, 3 Jun 2019 19:20:10 GMT (envelope-from mav@FreeBSD.org) Received: (from mav@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x53JKAZ9095808; Mon, 3 Jun 2019 19:20:10 GMT (envelope-from mav@FreeBSD.org) Message-Id: <201906031920.x53JKAZ9095808@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: mav set sender to mav@FreeBSD.org using -f From: Alexander Motin Date: Mon, 3 Jun 2019 19:20:10 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-vendor@freebsd.org Subject: svn commit: r348572 - vendor/illumos/dist/lib/libzfs/common X-SVN-Group: vendor X-SVN-Commit-Author: mav X-SVN-Commit-Paths: vendor/illumos/dist/lib/libzfs/common X-SVN-Commit-Revision: 348572 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 238B76AE88 X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.96 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; NEURAL_HAM_SHORT(-0.96)[-0.963,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US] X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.29 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: Mon, 03 Jun 2019 19:20:11 -0000 Author: mav Date: Mon Jun 3 19:20:10 2019 New Revision: 348572 URL: https://svnweb.freebsd.org/changeset/base/348572 Log: 9880 Race in ZFS parallel mount illumos/illumos-gate@bc4c0ff1343a311cc24933908ac6c4455af09031 Reviewed by: Jason King Reviewed by: Sebastien Roy Approved by: Joshua M. Clulow Author: Andy Fiddaman Modified: vendor/illumos/dist/lib/libzfs/common/libzfs_mount.c Modified: vendor/illumos/dist/lib/libzfs/common/libzfs_mount.c ============================================================================== --- vendor/illumos/dist/lib/libzfs/common/libzfs_mount.c Mon Jun 3 19:19:35 2019 (r348571) +++ vendor/illumos/dist/lib/libzfs/common/libzfs_mount.c Mon Jun 3 19:20:10 2019 (r348572) @@ -26,6 +26,7 @@ * Copyright 2016 Igor Kozhukhov * Copyright 2017 Joyent, Inc. * Copyright 2017 RackTop Systems. + * Copyright 2018 OmniOS Community Edition (OmniOSce) Association. */ /* @@ -1142,19 +1143,28 @@ zfs_iter_cb(zfs_handle_t *zhp, void *data) /* * Sort comparator that compares two mountpoint paths. We sort these paths so * that subdirectories immediately follow their parents. This means that we - * effectively treat the '/' character as the lowest value non-nul char. An - * example sorted list using this comparator would look like: + * effectively treat the '/' character as the lowest value non-nul char. + * Since filesystems from non-global zones can have the same mountpoint + * as other filesystems, the comparator sorts global zone filesystems to + * the top of the list. This means that the global zone will traverse the + * filesystem list in the correct order and can stop when it sees the + * first zoned filesystem. In a non-global zone, only the delegated + * filesystems are seen. * + * An example sorted list using this comparator would look like: + * * /foo * /foo/bar * /foo/bar/baz * /foo/baz * /foo.bar + * /foo (NGZ1) + * /foo (NGZ2) * * The mounting code depends on this ordering to deterministically iterate * over filesystems in order to spawn parallel mount tasks. */ -int +static int mountpoint_cmp(const void *arga, const void *argb) { zfs_handle_t *const *zap = arga; @@ -1166,7 +1176,15 @@ mountpoint_cmp(const void *arga, const void *argb) const char *a = mounta; const char *b = mountb; boolean_t gota, gotb; + uint64_t zoneda, zonedb; + zoneda = zfs_prop_get_int(za, ZFS_PROP_ZONED); + zonedb = zfs_prop_get_int(zb, ZFS_PROP_ZONED); + if (zoneda && !zonedb) + return (1); + if (!zoneda && zonedb) + return (-1); + gota = (zfs_get_type(za) == ZFS_TYPE_FILESYSTEM); if (gota) { verify(zfs_prop_get(za, ZFS_PROP_MOUNTPOINT, mounta, @@ -1379,6 +1397,8 @@ void zfs_foreach_mountpoint(libzfs_handle_t *hdl, zfs_handle_t **handles, size_t num_handles, zfs_iter_f func, void *data, boolean_t parallel) { + zoneid_t zoneid = getzoneid(); + /* * The ZFS_SERIAL_MOUNT environment variable is an undocumented * variable that can be used as a convenience to do a/b comparison @@ -1414,6 +1434,14 @@ zfs_foreach_mountpoint(libzfs_handle_t *hdl, zfs_handl */ for (int i = 0; i < num_handles; i = non_descendant_idx(handles, num_handles, i)) { + /* + * Since the mountpoints have been sorted so that the zoned + * filesystems are at the end, a zoned filesystem seen from + * the global zone means that we're done. + */ + if (zoneid == GLOBAL_ZONEID && + zfs_prop_get_int(handles[i], ZFS_PROP_ZONED)) + break; zfs_dispatch_mount(hdl, handles, num_handles, i, func, data, tq); }