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/*
* 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 "include/types.h"
#include "rbd/features.h"
/* New-style 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>.00000000
* rbd_data.<id>.00000001
* ... - data
*/
#define RBD_HEADER_PREFIX "rbd_header."
#define RBD_OBJECT_MAP_PREFIX "rbd_object_map."
#define RBD_DATA_PREFIX "rbd_data."
#define RBD_ID_PREFIX "rbd_id."
/*
* old-style rbd image 'foo' consists of objects
* foo.rbd - image metadata
* rb.<idhi>.<idlo>.00000000
* rb.<idhi>.<idlo>.00000001
* ... - data
*/
#define RBD_SUFFIX ".rbd"
#define RBD_DIRECTORY "rbd_directory"
#define RBD_INFO "rbd_info"
#define RBD_NAMESPACE "rbd_namespace"
#define RBD_TASK "rbd_task"
/*
* rbd_children object in each pool contains omap entries
* that map parent (poolid, imageid, snapid) to a list of children
* (imageids; snapids aren't required because we get all the snapshot
* info from a read of the child's header object anyway).
*
* The clone operation writes a new item to this child list, and rm or
* flatten removes an item, and may remove the whole entry if no children
* exist after the rm/flatten.
*
* When attempting to remove a parent, all pools are searched for
* rbd_children objects with entries referring to that parent; if any
* exist (and those children exist), the parent removal is prevented.
*/
#define RBD_CHILDREN "rbd_children"
#define RBD_LOCK_NAME "rbd_lock"
/**
* rbd_mirroring object in each pool contains pool-specific settings
* for configuring mirroring.
*/
#define RBD_MIRRORING "rbd_mirroring"
/**
* rbd_mirror_leader and rbd_mirror_instance.<instance id> objects are used
* for pool-level coordination between rbd-mirror daemons.
*/
#define RBD_MIRROR_LEADER "rbd_mirror_leader"
#define RBD_MIRROR_INSTANCE_PREFIX "rbd_mirror_instance."
#define RBD_MAX_OBJ_NAME_SIZE 96
#define RBD_MAX_BLOCK_NAME_SIZE 24
/**
* Maximum string length of the RBD v2 image id (not including
* null termination). This limit was derived from the existing
* RBD_MAX_BLOCK_NAME_SIZE limit which needs to hold the "rbd_data."
* prefix and null termination.
*/
#define RBD_MAX_IMAGE_ID_LENGTH 14
/**
* Maximum string length of the RBD block object name prefix (not including
* null termination).
*
* v1 format: rb.<max 8-byte high id>.<max 8-byte low id>.<max 8-byte extra>
* v2 format: rbd_data.[<max 19-byte pool id>.]<max 14-byte image id>
*
* Note: new features might require increasing this maximum prefix length.
*/
#define RBD_MAX_BLOCK_NAME_PREFIX_LENGTH 43
#define RBD_COMP_NONE 0
#define RBD_CRYPT_NONE 0
#define RBD_HEADER_TEXT "<<< Rados Block Device Image >>>\n"
#define RBD_MIGRATE_HEADER_TEXT "<<< Migrating RBD Image >>>\n"
#define RBD_HEADER_SIGNATURE "RBD"
#define RBD_HEADER_VERSION "001.005"
#define RBD_GROUP_INVALID_POOL (-1)
#define RBD_GROUP_HEADER_PREFIX "rbd_group_header."
#define RBD_GROUP_DIRECTORY "rbd_group_directory"
#define RBD_TRASH "rbd_trash"
/**
* MON config-key prefix for storing optional remote cluster connectivity
* parameters
*/
#define RBD_MIRROR_CONFIG_KEY_PREFIX "rbd/mirror/"
#define RBD_MIRROR_SITE_NAME_CONFIG_KEY RBD_MIRROR_CONFIG_KEY_PREFIX "site_name"
#define RBD_MIRROR_PEER_CLIENT_ID_CONFIG_KEY RBD_MIRROR_CONFIG_KEY_PREFIX "peer_client_id"
#define RBD_MIRROR_PEER_CONFIG_KEY_PREFIX RBD_MIRROR_CONFIG_KEY_PREFIX "peer/"
struct rbd_info {
ceph_le64 max_id;
} __attribute__ ((packed));
struct rbd_obj_snap_ondisk {
ceph_le64 id;
ceph_le64 image_size;
} __attribute__((packed));
struct rbd_obj_header_ondisk {
char text[40];
char block_name[RBD_MAX_BLOCK_NAME_SIZE];
char signature[4];
char version[8];
struct {
__u8 order;
__u8 crypt_type;
__u8 comp_type;
__u8 unused;
} __attribute__((packed)) options;
ceph_le64 image_size;
ceph_le64 snap_seq;
ceph_le32 snap_count;
ceph_le32 reserved;
ceph_le64 snap_names_len;
struct rbd_obj_snap_ondisk snaps[0];
} __attribute__((packed));
enum {
RBD_PROTECTION_STATUS_UNPROTECTED = 0,
RBD_PROTECTION_STATUS_UNPROTECTING = 1,
RBD_PROTECTION_STATUS_PROTECTED = 2,
RBD_PROTECTION_STATUS_LAST = 3
};
#endif
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