blobstore: clone-snapshot classification

This patch introduces API to get some blobs capabilites:

bool spdk_blob_is_read_only(struct spdk_blob *blob);
bool spdk_blob_is_thin_provisioned(struct spdk_blob *blob);

to be used in upper level in the unified way.

Change-Id: I4411bb3f4dd0c64826ae16a66141b2911cbaab79
Signed-off-by: Tomasz Kulasek <tomaszx.kulasek@intel.com>
Reviewed-on: https://review.gerrithub.io/405022
Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>

include/spdk/blob.h

@@ -390,6 +390,24 @@ void spdk_bs_create_clone(struct spdk_blob_store *bs, spdk_blob_id blobid,
 			  const struct spdk_blob_xattr_opts *clone_xattrs,
 			  spdk_blob_op_with_id_complete cb_fn, void *cb_arg);
 
+/**
+ * Check if blob is read only.
+ *
+ * \param blob Blob.
+ *
+ * \return true if blob is read only.
+ */
+bool spdk_blob_is_read_only(struct spdk_blob *blob);
+
+/**
+ * Check if blob is thin-provisioned.
+ *
+ * \param blob Blob.
+ *
+ * \return true if blob is thin-provisioned.
+ */
+bool spdk_blob_is_thin_provisioned(struct spdk_blob *blob);
+
 /**
  * Delete an existing blob from the given blobstore.
  *

lib/blob/blobstore.c

@@ -4679,4 +4679,18 @@ spdk_bs_set_bstype(struct spdk_blob_store *bs, struct spdk_bs_type bstype)
 	memcpy(&bs->bstype, &bstype, sizeof(bstype));
 }
 
+bool
+spdk_blob_is_read_only(struct spdk_blob *blob)
+{
+	assert(blob != NULL);
+	return (blob->data_ro || blob->md_ro);
+}
+
+bool
+spdk_blob_is_thin_provisioned(struct spdk_blob *blob)
+{
+	assert(blob != NULL);
+	return !!(blob->invalid_flags & SPDK_BLOB_THIN_PROV);
+}
+
 SPDK_LOG_REGISTER_COMPONENT("blob", SPDK_LOG_BLOB)

lib/blob/blobstore.h

@@ -259,8 +259,6 @@ struct spdk_blob_md_descriptor_extent {
 #define SPDK_BLOB_DATA_RO_FLAGS_MASK	SPDK_BLOB_READ_ONLY
 #define SPDK_BLOB_MD_RO_FLAGS_MASK	0
 
-#define spdk_blob_is_thin_provisioned(blob) (blob->invalid_flags & SPDK_BLOB_THIN_PROV)
-
 struct spdk_blob_md_descriptor_flags {
 	uint8_t		type;
 	uint32_t	length;