metadata: add find_dead_glv fn

The find_dead_glv is a helper function that looks up dead LV in
struct volume_group's dead_lvs list and returns it if found.

2 files changed, 31 insertions, 0 deletions

diff --git a/lib/metadata/metadata-exported.h b/lib/metadata/metadata-exported.h
index 5ae28f432..55c0cbe86 100644
--- a/lib/metadata/metadata-exported.h
+++ b/lib/metadata/metadata-exported.h
@@ -990,6 +990,11 @@ struct lv_list *find_lv_in_vg(const struct volume_group *vg,
 /* FIXME Merge these functions with ones above */
 struct logical_volume *find_lv(const struct volume_group *vg,
 			       const char *lv_name);
+
+struct generic_logical_volume *find_dead_glv(const struct volume_group *vg,
+					     const char *dead_lv_name,
+					     struct glv_list **glvl_found);
+
 struct physical_volume *find_pv_by_name(struct cmd_context *cmd,
 					const char *pv_name,
 					int allow_orphan, int allow_unformatted);
diff --git a/lib/metadata/metadata.c b/lib/metadata/metadata.c
index d8bad0c3e..054173f37 100644
--- a/lib/metadata/metadata.c
+++ b/lib/metadata/metadata.c
@@ -2031,6 +2031,32 @@ struct logical_volume *find_lv(const struct volume_group *vg,
 	return lvl ? lvl->lv : NULL;
 }
 
+struct generic_logical_volume *find_dead_glv(const struct volume_group *vg,
+					     const char *dead_lv_name,
+					     struct glv_list **glvl_found)
+{
+	struct glv_list *glvl;
+	const char *ptr;
+
+	/* Use last component */
+	if ((ptr = strrchr(dead_lv_name, '/')))
+		ptr++;
+	else
+		ptr = dead_lv_name;
+
+	dm_list_iterate_items(glvl, &vg->dead_lvs) {
+		if (!strcmp(glvl->glv->dead->dname, ptr)) {
+			if (glvl_found)
+				*glvl_found = glvl;
+			return glvl->glv;
+		}
+	}
+
+	if (glvl_found)
+		*glvl_found = NULL;
+	return NULL;
+}
+
 struct physical_volume *find_pv(struct volume_group *vg, struct device *dev)
 {
 	struct pv_list *pvl;