projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 602adf40 YS |
1 | /* |
| 2 | * Ceph - scalable distributed file system | |
| 3 | * | |
| 4 | * Copyright (C) 2004-2010 Sage Weil <sage@newdream.net> | |
| 5 | * | |
| 6 | * This is free software; you can redistribute it and/or | |
| 7 | * modify it under the terms of the GNU Lesser General Public | |
| 8 | * License version 2.1, as published by the Free Software | |
| 9 | * Foundation. See file COPYING. | |
| 10 | * | |
| 11 | */ | |
| 12 | ||
| 13 | #ifndef CEPH_RBD_TYPES_H | |
| 14 | #define CEPH_RBD_TYPES_H | |
| 15 | ||
| 16 | #include <linux/types.h> | |
| 17 | ||
| 3bb59ad5 AE |
18 | /* For format version 2, rbd image 'foo' consists of objects |
| 19 | * rbd_id.foo - id of image | |
| 20 | * rbd_header.<id> - image metadata | |
| 22e8bd51 | 21 | * rbd_object_map.<id> - optional image object map |
| 3bb59ad5 AE |
22 | * rbd_data.<id>.0000000000000000 |
| 23 | * rbd_data.<id>.0000000000000001 | |
| 24 | * ... - data | |
| 25 | * Clients do not access header data directly in rbd format 2. | |
| 26 | */ | |
| 27 | ||
| 28 | #define RBD_HEADER_PREFIX "rbd_header." | |
| 22e8bd51 | 29 | #define RBD_OBJECT_MAP_PREFIX "rbd_object_map." |
| 3bb59ad5 | 30 | #define RBD_ID_PREFIX "rbd_id." |
| 223768d0 | 31 | #define RBD_V2_DATA_FORMAT "%s.%016llx" |
| 3bb59ad5 | 32 | |
| ed95b21a ID |
33 | #define RBD_LOCK_NAME "rbd_lock" |
| 34 | #define RBD_LOCK_TAG "internal" | |
| 35 | #define RBD_LOCK_COOKIE_PREFIX "auto" | |
| 36 | ||
| 37 | enum rbd_notify_op { | |
| 38 | RBD_NOTIFY_OP_ACQUIRED_LOCK = 0, | |
| 39 | RBD_NOTIFY_OP_RELEASED_LOCK = 1, | |
| 40 | RBD_NOTIFY_OP_REQUEST_LOCK = 2, | |
| 41 | RBD_NOTIFY_OP_HEADER_UPDATE = 3, | |
| 42 | }; | |
| 43 | ||
| 22e8bd51 ID |
44 | #define OBJECT_NONEXISTENT 0 |
| 45 | #define OBJECT_EXISTS 1 | |
| 46 | #define OBJECT_PENDING 2 | |
| 47 | #define OBJECT_EXISTS_CLEAN 3 | |
| 48 | ||
| 49 | #define RBD_FLAG_OBJECT_MAP_INVALID (1ULL << 0) | |
| 50 | #define RBD_FLAG_FAST_DIFF_INVALID (1ULL << 1) | |
| 51 | ||
| 602adf40 | 52 | /* |
| 3bb59ad5 AE |
53 | * For format version 1, rbd image 'foo' consists of objects |
| 54 | * foo.rbd - image metadata | |
| 223768d0 ID |
55 | * rb.<idhi>.<idlo>.<extra>.000000000000 |
| 56 | * rb.<idhi>.<idlo>.<extra>.000000000001 | |
| 3bb59ad5 AE |
57 | * ... - data |
| 58 | * There is no notion of a persistent image id in rbd format 1. | |
| 602adf40 YS |
59 | */ |
| 60 | ||
| 61 | #define RBD_SUFFIX ".rbd" | |
| 223768d0 | 62 | #define RBD_V1_DATA_FORMAT "%s.%012llx" |
| 3bb59ad5 | 63 | |
| 602adf40 YS |
64 | #define RBD_DIRECTORY "rbd_directory" |
| 65 | #define RBD_INFO "rbd_info" | |
| 66 | ||
| 67 | #define RBD_DEFAULT_OBJ_ORDER 22 /* 4MB */ | |
| 68 | #define RBD_MIN_OBJ_ORDER 16 | |
| 69 | #define RBD_MAX_OBJ_ORDER 30 | |
| 70 | ||
| 602adf40 YS |
71 | #define RBD_HEADER_TEXT "<<< Rados Block Device Image >>>\n" |
| 72 | #define RBD_HEADER_SIGNATURE "RBD" | |
| 73 | #define RBD_HEADER_VERSION "001.005" | |
| 74 | ||
| 602adf40 YS |
75 | struct rbd_image_snap_ondisk { |
| 76 | __le64 id; | |
| 77 | __le64 image_size; | |
| 78 | } __attribute__((packed)); | |
| 79 | ||
| 80 | struct rbd_image_header_ondisk { | |
| 81 | char text[40]; | |
| 843a0d08 | 82 | char object_prefix[24]; |
| 602adf40 YS |
83 | char signature[4]; |
| 84 | char version[8]; | |
| 85 | struct { | |
| 86 | __u8 order; | |
| 87 | __u8 crypt_type; | |
| 88 | __u8 comp_type; | |
| 89 | __u8 unused; | |
| 90 | } __attribute__((packed)) options; | |
| 91 | __le64 image_size; | |
| 92 | __le64 snap_seq; | |
| 93 | __le32 snap_count; | |
| 94 | __le32 reserved; | |
| 95 | __le64 snap_names_len; | |
| 53ab8e7c | 96 | struct rbd_image_snap_ondisk snaps[]; |
| 602adf40 YS |
97 | } __attribute__((packed)); |
| 98 | ||
| 99 | ||
| 100 | #endif |