From: Zdenek Kabelac <zkabelac@redhat.com>
Date: Sun, 2 Nov 2014 16:03:14 +0000 (+0100)
Subject: cache: convert thin-pool
X-Git-Tag: v2_02_112~74
X-Git-Url: https://sourceware.org/git/?a=commitdiff_plain;h=969ab6bbf02c11bf989ccc3105910a205448507b;p=lvm2.git

cache: convert thin-pool

Support caching of thin-pool.

lvresize needs to be resolved - so far, user
has to manually drop cache-pool before resizing.
---

diff --git a/lib/metadata/cache_manip.c b/lib/metadata/cache_manip.c
index 44d1bd88c..e59a32f5e 100644
--- a/lib/metadata/cache_manip.c
+++ b/lib/metadata/cache_manip.c
@@ -171,9 +171,12 @@ struct logical_volume *lv_cache_create(struct logical_volume *pool_lv,
 	struct lv_segment *seg;
 
 	if (!validate_lv_cache_create_pool(pool_lv) ||
-	    !validate_lv_cache_create_origin(origin_lv))
+	    !validate_lv_cache_create_origin(cache_lv))
 		return_NULL;
 
+	if (lv_is_thin_pool(cache_lv))
+		cache_lv = seg_lv(first_seg(cache_lv), 0); /* cache _tdata */
+
 	if (!(segtype = get_segtype_from_string(cmd, "cache")))
 		return_NULL;
 
diff --git a/tools/lvconvert.c b/tools/lvconvert.c
index f37a7a832..a5127097d 100644
--- a/tools/lvconvert.c
+++ b/tools/lvconvert.c
@@ -3188,8 +3188,7 @@ static int _lvconvert_cache(struct cmd_context *cmd,
 	struct logical_volume *pool_lv = lp->pool_data_lv;
 	struct logical_volume *cache_lv;
 
-	if (!validate_lv_cache_create_pool(pool_lv) ||
-	    !validate_lv_cache_create_origin(origin_lv))
+	if (!validate_lv_cache_create_pool(pool_lv))
 		return_0;
 
 	if (!archive(origin_lv->vg))
@@ -3254,12 +3253,10 @@ static int _lvconvert_single(struct cmd_context *cmd, struct logical_volume *lv,
 		return ECMD_PROCESSED;
 	}
 
-	if (lp->cache) {
-		if (lv_is_thin_pool(lv))
-			lv = seg_lv(first_seg(lv), 0); /* cache _tdata */
-		if (!validate_lv_cache_create_origin(lv))
-			return_ECMD_FAILED;
-	}
+	/* Validate origin prior we start conversion of pool */
+	if (lp->cache &&
+	    !validate_lv_cache_create_origin(lv))
+		return_ECMD_FAILED;
 
 	if (lp->thin) {
 		if (lv_is_cache_type(lv) ||