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| author | Ilya Dryomov | 2019-06-05 19:25:11 +0200 |
|---|---|---|
| committer | Ilya Dryomov | 2019-07-08 14:01:45 +0200 |
| commit | 22e8bd51bb0469d1a524130a057f894ff632376a (patch) | |
| tree | 1cf2eaf3fac621e7154f58a7915e94db5851744e /drivers/block/rbd_types.h | |
| parent | rbd: call rbd_dev_mapping_set() from rbd_dev_image_probe() (diff) | |
| download | kernel-qcow2-linux-22e8bd51bb0469d1a524130a057f894ff632376a.tar.gz kernel-qcow2-linux-22e8bd51bb0469d1a524130a057f894ff632376a.tar.xz kernel-qcow2-linux-22e8bd51bb0469d1a524130a057f894ff632376a.zip | |
rbd: support for object-map and fast-diff
Speed up reads, discards and zeroouts through RBD_OBJ_FLAG_MAY_EXIST
and RBD_OBJ_FLAG_NOOP_FOR_NONEXISTENT based on object map.
Invalid object maps are not trusted, but still updated. Note that we
never iterate, resize or invalidate object maps. If object-map feature
is enabled but object map fails to load, we just fail the requester
(either "rbd map" or I/O, by way of post-acquire action).
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'drivers/block/rbd_types.h')
| -rw-r--r-- | drivers/block/rbd_types.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/block/rbd_types.h b/drivers/block/rbd_types.h index 62ff50d3e7a6..ac98ab6ccd3b 100644 --- a/drivers/block/rbd_types.h +++ b/drivers/block/rbd_types.h @@ -18,6 +18,7 @@ /* For format version 2, rbd image 'foo' consists of objects * rbd_id.foo - id of image * rbd_header.<id> - image metadata + * rbd_object_map.<id> - optional image object map * rbd_data.<id>.0000000000000000 * rbd_data.<id>.0000000000000001 * ... - data @@ -25,6 +26,7 @@ */ #define RBD_HEADER_PREFIX "rbd_header." +#define RBD_OBJECT_MAP_PREFIX "rbd_object_map." #define RBD_ID_PREFIX "rbd_id." #define RBD_V2_DATA_FORMAT "%s.%016llx" @@ -39,6 +41,14 @@ enum rbd_notify_op { RBD_NOTIFY_OP_HEADER_UPDATE = 3, }; +#define OBJECT_NONEXISTENT 0 +#define OBJECT_EXISTS 1 +#define OBJECT_PENDING 2 +#define OBJECT_EXISTS_CLEAN 3 + +#define RBD_FLAG_OBJECT_MAP_INVALID (1ULL << 0) +#define RBD_FLAG_FAST_DIFF_INVALID (1ULL << 1) + /* * For format version 1, rbd image 'foo' consists of objects * foo.rbd - image metadata |