Index: head/sbin/geom/class/mirror/geom_mirror.c =================================================================== --- head/sbin/geom/class/mirror/geom_mirror.c (revision 258166) +++ head/sbin/geom/class/mirror/geom_mirror.c (working copy) @@ -28,6 +28,7 @@ __FBSDID("$FreeBSD$"); #include +#include #include #include #include @@ -53,6 +54,7 @@ static void mirror_activate(struct gctl_req *req); static void mirror_clear(struct gctl_req *req); static void mirror_dump(struct gctl_req *req); static void mirror_label(struct gctl_req *req); +static void mirror_resize(struct gctl_req *req, unsigned flags); struct g_command class_commands[] = { { "activate", G_FLAG_VERBOSE, mirror_main, G_NULL_OPTS, @@ -112,6 +114,13 @@ struct g_command class_commands[] = { { "remove", G_FLAG_VERBOSE, NULL, G_NULL_OPTS, "[-v] name prov ..." }, + { "resize", G_FLAG_VERBOSE, mirror_resize, + { + { 's', "size", "*", G_TYPE_STRING }, + G_OPT_SENTINEL + }, + "[-s size] [-v] name" + }, { "stop", G_FLAG_VERBOSE, NULL, { { 'f', "force", NULL, G_TYPE_BOOL }, @@ -376,3 +385,96 @@ mirror_activate(struct gctl_req *req) printf("Provider %s activated.\n", path); } } + +static struct gclass * +find_class(struct gmesh *mesh, const char *name) +{ + struct gclass *classp; + + LIST_FOREACH(classp, &mesh->lg_class, lg_class) { + if (strcmp(classp->lg_name, name) == 0) + return (classp); + } + return (NULL); +} + +static struct ggeom * +find_geom(struct gclass *classp, const char *name) +{ + struct ggeom *gp; + + LIST_FOREACH(gp, &classp->lg_geom, lg_geom) { + if (strcmp(gp->lg_name, name) == 0) + return (gp); + } + return (NULL); +} + +static void +mirror_resize(struct gctl_req *req, unsigned flags __unused) +{ + struct gmesh mesh; + struct gclass *classp; + struct ggeom *gp; + struct gprovider *pp; + struct gconsumer *cp; + off_t size; + int error, nargs; + const char *name; + char ssize[30]; + + nargs = gctl_get_int(req, "nargs"); + if (nargs < 1) { + gctl_error(req, "Too few arguments."); + return; + } + error = geom_gettree(&mesh); + if (error) + errc(EXIT_FAILURE, error, "Cannot get GEOM tree"); + name = gctl_get_ascii(req, "class"); + if (name == NULL) + abort(); + classp = find_class(&mesh, name); + if (classp == NULL) + errx(EXIT_FAILURE, "Class %s not found.", name); + name = gctl_get_ascii(req, "arg0"); + if (name == NULL) + abort(); + gp = find_geom(classp, name); + if (gp == NULL) + errx(EXIT_FAILURE, "No such geom: %s.", name); + pp = LIST_FIRST(&gp->lg_provider); + if (pp == NULL) + errx(EXIT_FAILURE, "Provider of geom %s not found.", name); + size = pp->lg_mediasize; + name = gctl_get_ascii(req, "size"); + if (name == NULL) + errx(EXIT_FAILURE, "The size is not specified."); + if (*name == '*') { +#define CSZ(c) ((c)->lg_provider->lg_mediasize - \ + (c)->lg_provider->lg_sectorsize) + /* Find the maximum possible size */ + LIST_FOREACH(cp, &gp->lg_consumer, lg_consumer) { + if (CSZ(cp) > size) + size = CSZ(cp); + } + LIST_FOREACH(cp, &gp->lg_consumer, lg_consumer) { + if (CSZ(cp) < size) + size = CSZ(cp); + } +#undef CSZ + if (size == pp->lg_mediasize) + errx(EXIT_FAILURE, + "Cannot expand provider %s\n", + pp->lg_name); + } else { + error = g_parse_lba(name, pp->lg_sectorsize, &size); + if (error) + errc(EXIT_FAILURE, error, "Invalid size param"); + size *= pp->lg_sectorsize; + } + snprintf(ssize, sizeof(ssize), "%ju", (uintmax_t)size); + gctl_change_param(req, "size", -1, ssize); + geom_deletetree(&mesh); + gctl_issue(req); +} Index: head/sbin/geom/class/mirror/gmirror.8 =================================================================== --- head/sbin/geom/class/mirror/gmirror.8 (revision 258166) +++ head/sbin/geom/class/mirror/gmirror.8 (working copy) @@ -24,7 +24,7 @@ .\" .\" $FreeBSD$ .\" -.Dd December 8, 2009 +.Dd November 14, 2013 .Dt GMIRROR 8 .Os .Sh NAME @@ -60,6 +60,11 @@ .Ar name .Ar prov ... .Nm +.Cm resize +.Op Fl v +.Op Fl s Ar size +.Ar name +.Nm .Cm insert .Op Fl hiv .Op Fl p Ar priority @@ -193,6 +198,16 @@ balance algorithm. Rebuild the given mirror components forcibly. If autosynchronization was not turned off for the given device, this command should be unnecessary. +.It Cm resize +Change the size of the given mirror. +.Pp +Additional options include: +.Bl -tag -width ".Fl s Ar size" +.It Fl s Ar size +New size of the mirror is expressed in logical block numbers. +This option can be omitted, then it will be automatically calculated to +maximum available size. +.El .It Cm insert Add the given component(s) to the existing mirror. .Pp Index: head/sys/geom/mirror/g_mirror.c =================================================================== --- head/sys/geom/mirror/g_mirror.c (revision 258166) +++ head/sys/geom/mirror/g_mirror.c (working copy) @@ -87,6 +87,7 @@ static int g_mirror_shutdown = 0; static int g_mirror_destroy_geom(struct gctl_req *req, struct g_class *mp, struct g_geom *gp); static g_taste_t g_mirror_taste; +static g_resize_t g_mirror_resize; static void g_mirror_init(struct g_class *mp); static void g_mirror_fini(struct g_class *mp); @@ -97,7 +98,8 @@ struct g_class g_mirror_class = { .taste = g_mirror_taste, .destroy_geom = g_mirror_destroy_geom, .init = g_mirror_init, - .fini = g_mirror_fini + .fini = g_mirror_fini, + .resize = g_mirror_resize }; @@ -640,9 +642,17 @@ g_mirror_write_metadata(struct g_mirror_disk *disk length = cp->provider->sectorsize; offset = cp->provider->mediasize - length; sector = malloc((size_t)length, M_MIRROR, M_WAITOK | M_ZERO); - if (md != NULL) - mirror_metadata_encode(md, sector); - error = g_write_data(cp, offset, sector, length); + if (md != NULL) { + /* + * Handle the case, when the size of parent provider reduced. + */ + if (offset < md->md_mediasize) + error = ENOSPC; + else + mirror_metadata_encode(md, sector); + } + if (error == 0) + error = g_write_data(cp, offset, sector, length); free(sector, M_MIRROR); if (error != 0) { if ((disk->d_flags & G_MIRROR_DISK_FLAG_BROKEN) == 0) { @@ -1323,7 +1333,7 @@ g_mirror_sync_request(struct bio *bp) } G_MIRROR_LOGREQ(3, bp, "Synchronization request finished."); sync = &disk->d_sync; - if (sync->ds_offset == sc->sc_mediasize || + if (sync->ds_offset >= sc->sc_mediasize || sync->ds_consumer == NULL || (sc->sc_flags & G_MIRROR_DEVICE_FLAG_DESTROY) != 0) { /* Don't send more synchronization requests. */ @@ -2717,6 +2727,7 @@ g_mirror_check_metadata(struct g_mirror_softc *sc, "md_balance", pp->name, sc->sc_name); return (EINVAL); } +#if 0 if (md->md_mediasize != sc->sc_mediasize) { G_MIRROR_DEBUG(1, "Invalid '%s' field on disk %s (device %s), skipping.", @@ -2723,6 +2734,7 @@ g_mirror_check_metadata(struct g_mirror_softc *sc, "md_mediasize", pp->name, sc->sc_name); return (EINVAL); } +#endif if (sc->sc_mediasize > pp->mediasize) { G_MIRROR_DEBUG(1, "Invalid size of disk %s (device %s), skipping.", pp->name, @@ -3115,6 +3127,22 @@ g_mirror_taste(struct g_class *mp, struct g_provid return (gp); } +static void +g_mirror_resize(struct g_consumer *cp) +{ + struct g_mirror_disk *disk; + + g_topology_assert(); + g_trace(G_T_TOPOLOGY, "%s(%s)", __func__, cp->provider->name); + + disk = cp->private; + if (disk == NULL) + return; + g_topology_unlock(); + g_mirror_update_metadata(disk); + g_topology_lock(); +} + static int g_mirror_destroy_geom(struct gctl_req *req __unused, struct g_class *mp __unused, struct g_geom *gp) Index: head/sys/geom/mirror/g_mirror_ctl.c =================================================================== --- head/sys/geom/mirror/g_mirror_ctl.c (revision 258166) +++ head/sys/geom/mirror/g_mirror_ctl.c (working copy) @@ -31,6 +31,7 @@ __FBSDID("$FreeBSD$"); #include #include #include +#include #include #include #include @@ -40,6 +41,7 @@ __FBSDID("$FreeBSD$"); #include #include #include +#include #include #include #include @@ -617,6 +619,75 @@ g_mirror_ctl_remove(struct gctl_req *req, struct g } static void +g_mirror_ctl_resize(struct gctl_req *req, struct g_class *mp) +{ + struct g_mirror_softc *sc; + struct g_mirror_disk *disk; + uint64_t mediasize; + const char *name, *s; + char *x; + int *nargs; + + nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); + if (nargs == NULL) { + gctl_error(req, "No '%s' argument.", "nargs"); + return; + } + if (*nargs != 1) { + gctl_error(req, "Missing device."); + return; + } + name = gctl_get_asciiparam(req, "arg0"); + if (name == NULL) { + gctl_error(req, "No 'arg%u' argument.", 0); + return; + } + s = gctl_get_asciiparam(req, "size"); + if (s == NULL) { + gctl_error(req, "No '%s' argument.", "size"); + return; + } + mediasize = strtouq(s, &x, 0); + if (*x != '\0' || mediasize == 0) { + gctl_error(req, "Invalid '%s' argument.", "size"); + return; + } + sc = g_mirror_find_device(mp, name); + if (sc == NULL) { + gctl_error(req, "No such device: %s.", name); + return; + } + /* Deny shrinking of an opened provider */ + if ((g_debugflags & 16) == 0 && (sc->sc_provider->acr > 0 || + sc->sc_provider->acw > 0 || sc->sc_provider->ace > 0)) { + if (sc->sc_mediasize > mediasize) { + gctl_error(req, "Device %s is busy.", + sc->sc_provider->name); + sx_xunlock(&sc->sc_lock); + return; + } + } + LIST_FOREACH(disk, &sc->sc_disks, d_next) { + if (mediasize > disk->d_consumer->provider->mediasize - + disk->d_consumer->provider->sectorsize) { + gctl_error(req, "Provider %s is too small.", + disk->d_name); + sx_xunlock(&sc->sc_lock); + return; + } + } + /* Update the size. */ + sc->sc_mediasize = mediasize; + LIST_FOREACH(disk, &sc->sc_disks, d_next) { + g_mirror_update_metadata(disk); + } + g_topology_lock(); + g_resize_provider(sc->sc_provider, mediasize); + g_topology_unlock(); + sx_xunlock(&sc->sc_lock); +} + +static void g_mirror_ctl_deactivate(struct gctl_req *req, struct g_class *mp) { struct g_mirror_softc *sc; @@ -793,6 +864,8 @@ g_mirror_config(struct gctl_req *req, struct g_cla g_mirror_ctl_insert(req, mp); else if (strcmp(verb, "remove") == 0) g_mirror_ctl_remove(req, mp); + else if (strcmp(verb, "resize") == 0) + g_mirror_ctl_resize(req, mp); else if (strcmp(verb, "deactivate") == 0) g_mirror_ctl_deactivate(req, mp); else if (strcmp(verb, "forget") == 0)