/* * Ceph - scalable distributed file system * * Copyright (C) 2004-2010 Sage Weil <sage@newdream.net> * * This is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License version 2.1, as published by the Free Software * Foundation. See file COPYING. * */ #ifndef CEPH_RBD_TYPES_H #define CEPH_RBD_TYPES_H #include <linux/types.h> /* 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 * Clients do not access header data directly in rbd format 2. */ #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" #define RBD_LOCK_NAME "rbd_lock" #define RBD_LOCK_TAG "internal" #define RBD_LOCK_COOKIE_PREFIX "auto" enum rbd_notify_op { RBD_NOTIFY_OP_ACQUIRED_LOCK = 0, RBD_NOTIFY_OP_RELEASED_LOCK = 1, RBD_NOTIFY_OP_REQUEST_LOCK = 2, 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 * rb.<idhi>.<idlo>.<extra>.000000000000 * rb.<idhi>.<idlo>.<extra>.000000000001 * ... - data * There is no notion of a persistent image id in rbd format 1. */ #define RBD_SUFFIX ".rbd" #define RBD_V1_DATA_FORMAT "%s.%012llx" #define RBD_DIRECTORY "rbd_directory" #define RBD_INFO "rbd_info" #define RBD_DEFAULT_OBJ_ORDER 22 /* 4MB */ #define RBD_MIN_OBJ_ORDER 16 #define RBD_MAX_OBJ_ORDER 30 #define RBD_HEADER_TEXT "<<< Rados Block Device Image >>>\n" #define RBD_HEADER_SIGNATURE "RBD" #define RBD_HEADER_VERSION "001.005" struct rbd_image_snap_ondisk { __le64 id; __le64 image_size; } __attribute__((packed)); struct rbd_image_header_ondisk { char text[40]; char object_prefix[24]; char signature[4]; char version[8]; struct { __u8 order; __u8 crypt_type; __u8 comp_type; __u8 unused; } __attribute__((packed)) options; __le64 image_size; __le64 snap_seq; __le32 snap_count; __le32 reserved; __le64 snap_names_len; struct rbd_image_snap_ondisk snaps[0]; } __attribute__((packed)); #endif