/*
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* Ceph - scalable distributed file system
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*
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* Copyright (C) 2004-2010 Sage Weil <sage@newdream.net>
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*
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* This is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2.1, as published by the Free Software
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* Foundation. See file COPYING.
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*
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*/
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#ifndef CEPH_RBD_TYPES_H
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#define CEPH_RBD_TYPES_H
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#include <linux/types.h>
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/* For format version 2, rbd image 'foo' consists of objects
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* rbd_id.foo - id of image
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* rbd_header.<id> - image metadata
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* rbd_object_map.<id> - optional image object map
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* rbd_data.<id>.0000000000000000
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* rbd_data.<id>.0000000000000001
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* ... - data
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* Clients do not access header data directly in rbd format 2.
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*/
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#define RBD_HEADER_PREFIX "rbd_header."
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#define RBD_OBJECT_MAP_PREFIX "rbd_object_map."
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#define RBD_ID_PREFIX "rbd_id."
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#define RBD_V2_DATA_FORMAT "%s.%016llx"
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#define RBD_LOCK_NAME "rbd_lock"
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#define RBD_LOCK_TAG "internal"
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#define RBD_LOCK_COOKIE_PREFIX "auto"
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enum rbd_notify_op {
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RBD_NOTIFY_OP_ACQUIRED_LOCK = 0,
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RBD_NOTIFY_OP_RELEASED_LOCK = 1,
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RBD_NOTIFY_OP_REQUEST_LOCK = 2,
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RBD_NOTIFY_OP_HEADER_UPDATE = 3,
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};
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#define OBJECT_NONEXISTENT 0
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#define OBJECT_EXISTS 1
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#define OBJECT_PENDING 2
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#define OBJECT_EXISTS_CLEAN 3
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#define RBD_FLAG_OBJECT_MAP_INVALID (1ULL << 0)
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#define RBD_FLAG_FAST_DIFF_INVALID (1ULL << 1)
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/*
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* For format version 1, rbd image 'foo' consists of objects
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* foo.rbd - image metadata
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* rb.<idhi>.<idlo>.<extra>.000000000000
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* rb.<idhi>.<idlo>.<extra>.000000000001
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* ... - data
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* There is no notion of a persistent image id in rbd format 1.
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*/
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#define RBD_SUFFIX ".rbd"
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#define RBD_V1_DATA_FORMAT "%s.%012llx"
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#define RBD_DIRECTORY "rbd_directory"
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#define RBD_INFO "rbd_info"
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#define RBD_DEFAULT_OBJ_ORDER 22 /* 4MB */
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#define RBD_MIN_OBJ_ORDER 16
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#define RBD_MAX_OBJ_ORDER 30
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#define RBD_HEADER_TEXT "<<< Rados Block Device Image >>>\n"
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#define RBD_HEADER_SIGNATURE "RBD"
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#define RBD_HEADER_VERSION "001.005"
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struct rbd_image_snap_ondisk {
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__le64 id;
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__le64 image_size;
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} __attribute__((packed));
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struct rbd_image_header_ondisk {
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char text[40];
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char object_prefix[24];
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char signature[4];
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char version[8];
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struct {
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__u8 order;
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__u8 crypt_type;
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__u8 comp_type;
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__u8 unused;
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} __attribute__((packed)) options;
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__le64 image_size;
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__le64 snap_seq;
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__le32 snap_count;
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__le32 reserved;
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__le64 snap_names_len;
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struct rbd_image_snap_ondisk snaps[];
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} __attribute__((packed));
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#endif
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