libdm: add dm_tree_node_add_thin_pool_target_v1

Supports thin-pool without crop.

4 files changed, 44 insertions, 13 deletions

diff --git a/WHATS_NEW_DM b/WHATS_NEW_DM
index 80ce15729..ba0129a55 100644
--- a/WHATS_NEW_DM
+++ b/WHATS_NEW_DM
@@ -1,5 +1,6 @@
 Version 1.02.177 - 
 ====================================
+  Add dm_tree_node_add_thin_pool_target_v1 with crop_metadata support.
 
 Version 1.02.175 - 08th January 2021
 ====================================
diff --git a/libdm/.exported_symbols.DM_1_02_172 b/libdm/.exported_symbols.DM_1_02_172
new file mode 100644
index 000000000..ed4cce7d6
--- /dev/null
+++ b/libdm/.exported_symbols.DM_1_02_172
@@ -0,0 +1 @@
+dm_tree_node_add_thin_pool_target_v1
diff --git a/libdm/libdevmapper.h b/libdm/libdevmapper.h
index a61ffe17e..26d64bf4e 100644
--- a/libdm/libdevmapper.h
+++ b/libdm/libdevmapper.h
@@ -1968,10 +1968,10 @@ int dm_tree_node_add_replicator_dev_target(struct dm_tree_node *node,
 #define DM_THIN_MIN_DATA_BLOCK_SIZE (UINT32_C(128))
 #define DM_THIN_MAX_DATA_BLOCK_SIZE (UINT32_C(2097152))
 /*
- * Max supported size for thin pool  metadata device (17112760320 bytes)
- * Limitation is hardcoded into the kernel and bigger device size
- * is not accepted.
+ * Max supported size for thin pool metadata device (17045913600 bytes)
  * drivers/md/dm-thin-metadata.h THIN_METADATA_MAX_SECTORS
+ * But here DM_THIN_MAX_METADATA_SIZE got defined incorrectly
+ * Correct size is (UINT64_C(255) * ((1 << 14) - 64) * (4096 / (1 << 9)))
  */
 #define DM_THIN_MAX_METADATA_SIZE   (UINT64_C(255) * (1 << 14) * (4096 / (1 << 9)) - 256 * 1024)
 
@@ -1984,6 +1984,16 @@ int dm_tree_node_add_thin_pool_target(struct dm_tree_node *node,
 				      uint64_t low_water_mark,
 				      unsigned skip_block_zeroing);
 
+int dm_tree_node_add_thin_pool_target_v1(struct dm_tree_node *node,
+					 uint64_t size,
+					 uint64_t transaction_id,
+					 const char *metadata_uuid,
+					 const char *pool_uuid,
+					 uint32_t data_block_size,
+					 uint64_t low_water_mark,
+					 unsigned skip_block_zeroing,
+					 unsigned crop_metadata);
+
 /* Supported messages for thin provision target */
 typedef enum {
 	DM_THIN_MESSAGE_CREATE_SNAP,		/* device_id, origin_id */
diff --git a/libdm/libdm-deptree.c b/libdm/libdm-deptree.c
index f16db8568..336cbb696 100644
--- a/libdm/libdm-deptree.c
+++ b/libdm/libdm-deptree.c
@@ -3503,6 +3503,24 @@ int dm_tree_node_add_thin_pool_target(struct dm_tree_node *node,
 				      uint64_t low_water_mark,
 				      unsigned skip_block_zeroing)
 {
+	return dm_tree_node_add_thin_pool_target_v1(node, size, transaction_id,
+						    metadata_uuid, pool_uuid,
+						    data_block_size,
+						    low_water_mark,
+						    skip_block_zeroing,
+						    1);
+}
+
+int dm_tree_node_add_thin_pool_target_v1(struct dm_tree_node *node,
+					 uint64_t size,
+					 uint64_t transaction_id,
+					 const char *metadata_uuid,
+					 const char *pool_uuid,
+					 uint32_t data_block_size,
+					 uint64_t low_water_mark,
+					 unsigned skip_block_zeroing,
+					 unsigned crop_metadata)
+{
 	struct load_segment *seg, *mseg;
 	uint64_t devsize = 0;
 
@@ -3529,17 +3547,18 @@ int dm_tree_node_add_thin_pool_target(struct dm_tree_node *node,
 	if (!_link_tree_nodes(node, seg->metadata))
 		return_0;
 
-	/* FIXME: more complex target may need more tweaks */
-	dm_list_iterate_items(mseg, &seg->metadata->props.segs) {
-		devsize += mseg->size;
-		if (devsize > DM_THIN_MAX_METADATA_SIZE) {
-			log_debug_activation("Ignoring %" PRIu64 " of device.",
-					     devsize - DM_THIN_MAX_METADATA_SIZE);
-			mseg->size -= (devsize - DM_THIN_MAX_METADATA_SIZE);
-			devsize = DM_THIN_MAX_METADATA_SIZE;
-			/* FIXME: drop remaining segs */
+	if (crop_metadata)
+		/* FIXME: more complex target may need more tweaks */
+		dm_list_iterate_items(mseg, &seg->metadata->props.segs) {
+			devsize += mseg->size;
+			if (devsize > DM_THIN_MAX_METADATA_SIZE) {
+				log_debug_activation("Ignoring %" PRIu64 " of device.",
+						     devsize - DM_THIN_MAX_METADATA_SIZE);
+				mseg->size -= (devsize - DM_THIN_MAX_METADATA_SIZE);
+				devsize = DM_THIN_MAX_METADATA_SIZE;
+				/* FIXME: drop remaining segs */
+			}
 		}
-	}
 
 	if (!(seg->pool = dm_tree_find_node_by_uuid(node->dtree, pool_uuid))) {
 		log_error("Missing pool uuid %s.", pool_uuid);