Commit 3dadb79e authored by Tomasz Zawadzki's avatar Tomasz Zawadzki
Browse files

lib/blob: add EXTENT_RLE descriptor description 



Since further patches will be adding new descriptors
that are related to cluster layout throughout the blobstore,
add description for existing descriptor too.

Signed-off-by: default avatarTomasz Zawadzki <tomasz.zawadzki@intel.com>
Change-Id: I722eb633445685789d5185ed59dfc910f76b109f
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/481724


Tested-by: default avatarSPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: default avatarPaul Luse <paul.e.luse@intel.com>
Reviewed-by: default avatarShuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: default avatarJim Harris <james.r.harris@intel.com>
Reviewed-by: default avatarBen Walker <benjamin.walker@intel.com>
parent c33840b7

lib/blob/blobstore.h

+8 −1
Original line number Diff line number Diff line
@@ -245,11 +245,18 @@ struct spdk_bs_md_mask { 
};



#define SPDK_MD_DESCRIPTOR_TYPE_PADDING 0

#define SPDK_MD_DESCRIPTOR_TYPE_EXTENT_RLE 1

#define SPDK_MD_DESCRIPTOR_TYPE_XATTR 2

#define SPDK_MD_DESCRIPTOR_TYPE_FLAGS 3

#define SPDK_MD_DESCRIPTOR_TYPE_XATTR_INTERNAL 4



/* Following descriptors define cluster layout in a blob. */



/* EXTENT_RLE descriptor holds an array of LBA that points to

 * beginning of allocated clusters. The array is run-length encoded,

 * with 0's being unallocated clusters. It is part of serialized

 * metadata chain for a blob. */

#define SPDK_MD_DESCRIPTOR_TYPE_EXTENT_RLE 1



struct spdk_blob_md_descriptor_xattr {

	uint8_t		type;

	uint32_t	length;