diff options
Diffstat (limited to 'lib/metadata/cache_manip.c')
| -rw-r--r-- | lib/metadata/cache_manip.c | 40 |
1 files changed, 37 insertions, 3 deletions
diff --git a/lib/metadata/cache_manip.c b/lib/metadata/cache_manip.c index f7b1b995d..6a13ec1c1 100644 --- a/lib/metadata/cache_manip.c +++ b/lib/metadata/cache_manip.c @@ -399,18 +399,52 @@ int lv_cache_setpolicy(struct logical_volume *lv, struct dm_config_tree *policy) { struct lv_segment *seg = first_seg(lv); const char *name; + struct dm_config_node *cn; + struct dm_config_tree *old = NULL, *new = NULL, *tmp = NULL; + int r = 0; if (lv_is_cache(lv)) seg = first_seg(seg->pool_lv); + if (seg->policy_settings) { + if (!(old = dm_config_create())) + goto_out; + if (!(new = dm_config_create())) + goto_out; + new->root = policy->root; + old->root = seg->policy_settings; + new->cascade = old; + if (!(tmp = policy = dm_config_flatten(new))) + goto_out; + } + if (!(seg->policy_settings = dm_config_clone_node_with_mem(lv->vg->vgmem, policy->root, 0))) - return_0; + goto_out; if ((name = dm_config_find_str(policy->root, "policy", NULL)) && !(seg->policy_name = dm_pool_strdup(lv->vg->vgmem, name))) - return_0; + goto_out; + +restart: /* remove any 'default" nodes */ + cn = seg->policy_settings->child; + while (cn) { + if (cn->v->type == DM_CFG_STRING && !strcmp(cn->v->v.str, "default")) { + dm_config_remove_node(seg->policy_settings, cn); + goto restart; + } + cn = cn->sib; + } - return 1; + r = 1; + +out: + if (old) + dm_config_destroy(old); + if (new) + dm_config_destroy(new); + if (tmp) + dm_config_destroy(tmp); + return r; } /* |