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lib/blob: add EXTENT_RLE descriptor description

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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: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Change-Id: I722eb633445685789d5185ed59dfc910f76b109f
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/481724
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Paul Luse <paul.e.luse@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
This commit is contained in:
Tomasz Zawadzki 2020-01-15 04:32:34 -05:00
parent c33840b7e6
commit 3dadb79e37
1 changed files with 8 additions and 1 deletions
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9
lib/blob/blobstore.h
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@ -245,11 +245,18 @@ struct spdk_bs_md_mask {
}; };
#define SPDK_MD_DESCRIPTOR_TYPE_PADDING 0 #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_XATTR 2
#define SPDK_MD_DESCRIPTOR_TYPE_FLAGS 3 #define SPDK_MD_DESCRIPTOR_TYPE_FLAGS 3
#define SPDK_MD_DESCRIPTOR_TYPE_XATTR_INTERNAL 4 #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 { struct spdk_blob_md_descriptor_xattr {
uint8_t type; uint8_t type;
uint32_t length; uint32_t length;