lvextend: enable resize of writecached LV

diff --git a/lib/metadata/lv_manip.c b/lib/metadata/lv_manip.c
index 5cad4e07a86cebef900450f8cf09776107c3c6a2..9bcab7477181621a5397ceee77fe1d44887ab92b 100644 (file)
--- a/lib/metadata/lv_manip.c
+++ b/lib/metadata/lv_manip.c
@@ -1465,7 +1465,8 @@ static struct logical_volume *_get_resizable_layer_lv(struct logical_volume *lv)
        while (lv_is_cache(lv) || /* _corig */
               lv_is_integrity(lv) ||
               lv_is_thin_pool(lv) || /* _tdata */
-              lv_is_vdo_pool(lv)) /* _vdata */
+              lv_is_vdo_pool(lv) || /* _vdata */
+              lv_is_writecache(lv)) /* _worigin */
                lv = seg_lv(first_seg(lv), 0);  /* component-level down */
 
        return lv;
@@ -1479,7 +1480,8 @@ static int _is_layered_lv(struct logical_volume *lv)
        return (lv_is_cache_origin(lv) ||
                lv_is_integrity_origin(lv) ||
                lv_is_thin_pool_data(lv) ||
-               lv_is_vdo_pool_data(lv));
+               lv_is_vdo_pool_data(lv) ||
+               lv_is_writecache_origin(lv));
 }
 
 /* Find the topmost LV in the stack - usually such LV is visible. */
@@ -5173,11 +5175,6 @@ static int _lvresize_check(struct logical_volume *lv,
        struct volume_group *vg = lv->vg;
        struct lv_segment *seg = first_seg(lv);
 
-       if (lv_is_writecache(lv)) {
-               log_error("Resize not yet allowed on LVs with writecache attached.");
-               return 0;
-       }
-
        if (lv_is_external_origin(lv)) {
                /*
                 * Since external-origin can be activated read-only,
@@ -5803,6 +5800,11 @@ static int _lvresize_check_type(const struct logical_volume *lv,
                                  display_lvname(lv));
                        return 0;
                }
+               if (lv_is_writecache(lv)) {
+                       /* TODO: detect kernel with support for reduction */
+                       log_error("Reduce not yet allowed on LVs with writecache attached.");
+                       return 0;
+               }
        } else if (lp->resize == LV_EXTEND)  {
                if (lv_is_thin_pool_metadata(lv) &&
                    (!(seg = find_pool_seg(first_seg(lv))) ||