Date: Tue, 30 Jan 2018 21:25:43 +0000 (UTC) From: Alan Somers <asomers@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r328605 - head/cddl/usr.sbin/zfsd Message-ID: <201801302125.w0ULPhRN019592@repo.freebsd.org>
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Author: asomers Date: Tue Jan 30 21:25:43 2018 New Revision: 328605 URL: https://svnweb.freebsd.org/changeset/base/328605 Log: zfsd: Don't spare a vdev that's being replaced If a zfs pool contains a replacing vdev (either created manually by "zpool replace" or by zfsd(8) via autoreplace by physical path) and then new spares get added to the pool, zfsd shouldn't use one to replace the drive that is already being replaced. That's a waste of resources that just slows down the rebuild. PR: 225547 MFC after: 3 weeks Sponsored by: Spectra Logic Corp Modified: head/cddl/usr.sbin/zfsd/case_file.cc Modified: head/cddl/usr.sbin/zfsd/case_file.cc ============================================================================== --- head/cddl/usr.sbin/zfsd/case_file.cc Tue Jan 30 20:49:49 2018 (r328604) +++ head/cddl/usr.sbin/zfsd/case_file.cc Tue Jan 30 21:25:43 2018 (r328605) @@ -442,10 +442,38 @@ CaseFile::ReEvaluate(const ZfsEvent &event) return (consumed || closed); } +/* Find a Vdev containing the vdev with the given GUID */ +static nvlist_t* +find_parent(nvlist_t *pool_config, nvlist_t *config, DevdCtl::Guid child_guid) +{ + nvlist_t **vdevChildren; + int error; + unsigned ch, numChildren; + error = nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_CHILDREN, + &vdevChildren, &numChildren); + + if (error != 0 || numChildren == 0) + return (NULL); + + for (ch = 0; ch < numChildren; ch++) { + nvlist *result; + Vdev vdev(pool_config, vdevChildren[ch]); + + if (vdev.GUID() == child_guid) + return (config); + + result = find_parent(pool_config, vdevChildren[ch], child_guid); + if (result != NULL) + return (result); + } + + return (NULL); +} + bool CaseFile::ActivateSpare() { - nvlist_t *config, *nvroot; + nvlist_t *config, *nvroot, *parent_config; nvlist_t **spares; char *devPath, *vdev_type; const char *poolname; @@ -472,6 +500,22 @@ CaseFile::ActivateSpare() { "tree for pool %s", poolname); return (false); } + + parent_config = find_parent(config, nvroot, m_vdevGUID); + if (parent_config != NULL) { + char *parent_type; + + /* + * Don't activate spares for members of a "replacing" vdev. + * They're already dealt with. Sparing them will just drag out + * the resilver process. + */ + error = nvlist_lookup_string(parent_config, + ZPOOL_CONFIG_TYPE, &parent_type); + if (error == 0 && strcmp(parent_type, VDEV_TYPE_REPLACING) == 0) + return (false); + } + nspares = 0; nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, &spares, &nspares);
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