Date: Fri, 28 Oct 2016 18:25:32 +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-10@freebsd.org Subject: svn commit: r308061 - in stable/10/sys: cddl/contrib/opensolaris/uts/common/fs/zfs geom Message-ID: <201610281825.u9SIPWDA068597@repo.freebsd.org>
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Author: mav Date: Fri Oct 28 18:25:32 2016 New Revision: 308061 URL: https://svnweb.freebsd.org/changeset/base/308061 Log: MFC r300881, r302058 (by asomers): Avoid issuing spa config updates for physical path when not necessary ZFS's configuration needs to be updated whenever the physical path for a device changes, but not when a new device is introduced. This is because new devices necessarily cause config updates, but only if they are actually accepted into the pool. sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_geom.c Split vdev_geom_set_physpath out of vdev_geom_attrchanged. When setting the vdev's physical path, only request a config update if the physical path has changed. Don't request it when opening a device for the first time, because the config sync will happen anyway upstack. sys/geom/geom_dev.c Split g_dev_set_physpath and g_dev_set_media out of g_dev_attrchanged Modified: stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_geom.c stable/10/sys/geom/geom_dev.c Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_geom.c ============================================================================== --- stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_geom.c Fri Oct 28 18:24:05 2016 (r308060) +++ stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_geom.c Fri Oct 28 18:25:32 2016 (r308061) @@ -87,32 +87,17 @@ vdev_geom_set_rotation_rate(vdev_t *vd, } static void -vdev_geom_attrchanged(struct g_consumer *cp, const char *attr) +vdev_geom_set_physpath(struct g_consumer *cp, boolean_t do_null_update) { + boolean_t needs_update = B_FALSE; vdev_t *vd; - spa_t *spa; char *physpath; int error, physpath_len; - vd = cp->private; - if (vd == NULL) - return; - - if (strcmp(attr, "GEOM::rotation_rate") == 0) { - vdev_geom_set_rotation_rate(vd, cp); - return; - } - - if (strcmp(attr, "GEOM::physpath") != 0) - return; - if (g_access(cp, 1, 0, 0) != 0) return; - /* - * Record/Update physical path information for this device. - */ - spa = vd->vdev_spa; + vd = cp->private; physpath_len = MAXPATHLEN; physpath = g_malloc(physpath_len, M_WAITOK|M_ZERO); error = g_io_getattr("GEOM::physpath", cp, &physpath_len, physpath); @@ -124,12 +109,46 @@ vdev_geom_attrchanged(struct g_consumer g_topology_assert(); old_physpath = vd->vdev_physpath; vd->vdev_physpath = spa_strdup(physpath); - spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); - if (old_physpath != NULL) + if (old_physpath != NULL) { + needs_update = (strcmp(old_physpath, + vd->vdev_physpath) != 0); spa_strfree(old_physpath); + } else + needs_update = do_null_update; } g_free(physpath); + + /* + * If the physical path changed, update the config. + * Only request an update for previously unset physpaths if + * requested by the caller. + */ + if (needs_update) + spa_async_request(vd->vdev_spa, SPA_ASYNC_CONFIG_UPDATE); + +} + +static void +vdev_geom_attrchanged(struct g_consumer *cp, const char *attr) +{ + vdev_t *vd; + char *old_physpath; + int error; + + vd = cp->private; + if (vd == NULL) + return; + + if (strcmp(attr, "GEOM::rotation_rate") == 0) { + vdev_geom_set_rotation_rate(vd, cp); + return; + } + + if (strcmp(attr, "GEOM::physpath") == 0) { + vdev_geom_set_physpath(cp, /*do_null_update*/B_TRUE); + return; + } } static void @@ -259,8 +278,10 @@ vdev_geom_attach(struct g_provider *pp, * 2) Set it to a linked list of vdevs, not just a single vdev */ cp->private = vd; - if (vd != NULL) + if (vd != NULL) { vd->vdev_tsd = cp; + vdev_geom_set_physpath(cp, /*do_null_update*/B_FALSE); + } cp->flags |= G_CF_DIRECT_SEND | G_CF_DIRECT_RECEIVE; return (cp); Modified: stable/10/sys/geom/geom_dev.c ============================================================================== --- stable/10/sys/geom/geom_dev.c Fri Oct 28 18:24:05 2016 (r308060) +++ stable/10/sys/geom/geom_dev.c Fri Oct 28 18:25:32 2016 (r308061) @@ -222,55 +222,68 @@ g_dev_print(void) } static void -g_dev_attrchanged(struct g_consumer *cp, const char *attr) +g_dev_set_physpath(struct g_consumer *cp) +{ + struct g_dev_softc *sc; + char *physpath; + int error, physpath_len; + + if (g_access(cp, 1, 0, 0) != 0) + return; + + sc = cp->private; + physpath_len = MAXPATHLEN; + physpath = g_malloc(physpath_len, M_WAITOK|M_ZERO); + error = g_io_getattr("GEOM::physpath", cp, &physpath_len, physpath); + g_access(cp, -1, 0, 0); + if (error == 0 && strlen(physpath) != 0) { + struct cdev *dev, *old_alias_dev; + struct cdev **alias_devp; + + dev = sc->sc_dev; + old_alias_dev = sc->sc_alias; + alias_devp = (struct cdev **)&sc->sc_alias; + make_dev_physpath_alias(MAKEDEV_WAITOK, alias_devp, dev, + old_alias_dev, physpath); + } else if (sc->sc_alias) { + destroy_dev((struct cdev *)sc->sc_alias); + sc->sc_alias = NULL; + } + g_free(physpath); +} + +static void +g_dev_set_media(struct g_consumer *cp) { struct g_dev_softc *sc; struct cdev *dev; char buf[SPECNAMELEN + 6]; sc = cp->private; - if (strcmp(attr, "GEOM::media") == 0) { - dev = sc->sc_dev; + dev = sc->sc_dev; + snprintf(buf, sizeof(buf), "cdev=%s", dev->si_name); + devctl_notify_f("DEVFS", "CDEV", "MEDIACHANGE", buf, M_WAITOK); + devctl_notify_f("GEOM", "DEV", "MEDIACHANGE", buf, M_WAITOK); + dev = sc->sc_alias; + if (dev != NULL) { snprintf(buf, sizeof(buf), "cdev=%s", dev->si_name); devctl_notify_f("DEVFS", "CDEV", "MEDIACHANGE", buf, M_WAITOK); devctl_notify_f("GEOM", "DEV", "MEDIACHANGE", buf, M_WAITOK); - dev = sc->sc_alias; - if (dev != NULL) { - snprintf(buf, sizeof(buf), "cdev=%s", dev->si_name); - devctl_notify_f("DEVFS", "CDEV", "MEDIACHANGE", buf, - M_WAITOK); - devctl_notify_f("GEOM", "DEV", "MEDIACHANGE", buf, - M_WAITOK); - } - return; } +} - if (strcmp(attr, "GEOM::physpath") != 0) +static void +g_dev_attrchanged(struct g_consumer *cp, const char *attr) +{ + + if (strcmp(attr, "GEOM::media") == 0) { + g_dev_set_media(cp); return; + } - if (g_access(cp, 1, 0, 0) == 0) { - char *physpath; - int error, physpath_len; - - physpath_len = MAXPATHLEN; - physpath = g_malloc(physpath_len, M_WAITOK|M_ZERO); - error = - g_io_getattr("GEOM::physpath", cp, &physpath_len, physpath); - g_access(cp, -1, 0, 0); - if (error == 0 && strlen(physpath) != 0) { - struct cdev *old_alias_dev; - struct cdev **alias_devp; - - dev = sc->sc_dev; - old_alias_dev = sc->sc_alias; - alias_devp = (struct cdev **)&sc->sc_alias; - make_dev_physpath_alias(MAKEDEV_WAITOK, alias_devp, - dev, old_alias_dev, physpath); - } else if (sc->sc_alias) { - destroy_dev((struct cdev *)sc->sc_alias); - sc->sc_alias = NULL; - } - g_free(physpath); + if (strcmp(attr, "GEOM::physpath") == 0) { + g_dev_set_physpath(cp); + return; } }
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