Date: Thu, 22 Mar 2018 23:50:43 +0000 (UTC) From: Alexander Motin <mav@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r331391 - stable/11/cddl/contrib/opensolaris/lib/libzfs/common Message-ID: <201803222350.w2MNoh3r096551@repo.freebsd.org>
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Author: mav Date: Thu Mar 22 23:50:43 2018 New Revision: 331391 URL: https://svnweb.freebsd.org/changeset/base/331391 Log: MFC r329664: MFV r316893: 7604 if volblocksize property is the default, it displays as "-" rather than 8K illumos/illumos-gate@4d86c0eab246bdfddc2dd52410ba808433bd6266 https://github.com/illumos/illumos-gate/commit/4d86c0eab246bdfddc2dd52410ba808433bd6266 https://www.illumos.org/issues/7604 If a zvol has the default setting for the "volblocksize" property, it is 8KB. However, it is displayed as "-" (not present), rather than "8K". The problem was introduced by: commit 25228e830e86924a41243343b1de9daf2d7dd43a Author: Matthew Ahrens <mahrens@delphix.com> Date: Thu Nov 17 14:37:24 2016 -0800 7571 non-present readonly numeric ZFS props do not have default value which changed changed get_numeric_property() to indicate that readonly default properties are not present. However, zfs_prop_readonly() returns TRUE for both readonly and set-once properties (e.g. volblocksize). Amusingly, that commit essentially reverted: 6900484 default volblocksize is no longer being reported correctly from November 2009. However, that change was not correct either; the correct solution is to only do this check for "truly readonly" (i.e. not setonce) properties. $ zfs list -t volume -o name,volblocksize NAME VOLBLOCK domain0/group-100/appdata_container-101/appdata_windows_timeflow-102/ archive - domain0/group-100/appdata_container-101/appdata_windows_timeflow-102/ datafile - domain0/group-100/appdata_container-101/appdata_windows_timeflow-102/ external - rpool/dump 128K rpool/swap 4K rpool/swap1 =============================================================================== Reviewed by: Pavel Zakharov <pavel.zakharov@delphix.com> Reviewed by: Paul Dagnelie <pcd@delphix.com> Reviewed by: John Kennedy <john.kennedy@delphix.com> Reviewed by: George Wilson <george.wilson@delphix.com> Approved by: Robert Mustacchi <rm@joyent.com> Author: Matthew Ahrens <mahrens@delphix.com> Modified: stable/11/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_dataset.c Directory Properties: stable/11/ (props changed) Modified: stable/11/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_dataset.c ============================================================================== --- stable/11/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_dataset.c Thu Mar 22 23:49:54 2018 (r331390) +++ stable/11/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_dataset.c Thu Mar 22 23:50:43 2018 (r331391) @@ -2161,9 +2161,12 @@ get_numeric_property(zfs_handle_t *zhp, zfs_prop_t pro /* * If we tried to use a default value for a * readonly property, it means that it was not - * present. + * present. Note this only applies to "truly" + * readonly properties, not set-once properties + * like volblocksize. */ if (zfs_prop_readonly(prop) && + !zfs_prop_setonce(prop) && *source != NULL && (*source)[0] == '\0') { *source = NULL; return (-1);
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