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| 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 | |
| 18 | /* |
| 19 | * rbd image 'foo' consists of objects |
| 20 | * foo.rbd - image metadata |
| 21 | * foo.00000000 |
| 22 | * foo.00000001 |
| 23 | * ... - data |
| 24 | */ |
| 25 | |
| 26 | #define RBD_SUFFIX ".rbd" |
| 27 | #define RBD_DIRECTORY "rbd_directory" |
| 28 | #define RBD_INFO "rbd_info" |
| 29 | |
| 30 | #define RBD_DEFAULT_OBJ_ORDER 22 /* 4MB */ |
| 31 | #define RBD_MIN_OBJ_ORDER 16 |
| 32 | #define RBD_MAX_OBJ_ORDER 30 |
| 33 | |
| 34 | #define RBD_MAX_SEG_NAME_LEN 128 |
| 35 | |
| 36 | #define RBD_COMP_NONE 0 |
| 37 | #define RBD_CRYPT_NONE 0 |
| 38 | |
| 39 | #define RBD_HEADER_TEXT "<<< Rados Block Device Image >>>\n" |
| 40 | #define RBD_HEADER_SIGNATURE "RBD" |
| 41 | #define RBD_HEADER_VERSION "001.005" |
| 42 | |
| 43 | struct rbd_image_snap_ondisk { |
| 44 | __le64 id; |
| 45 | __le64 image_size; |
| 46 | } __attribute__((packed)); |
| 47 | |
| 48 | struct rbd_image_header_ondisk { |
| 49 | char text[40]; |
| 50 | char block_name[24]; |
| 51 | char signature[4]; |
| 52 | char version[8]; |
| 53 | struct { |
| 54 | __u8 order; |
| 55 | __u8 crypt_type; |
| 56 | __u8 comp_type; |
| 57 | __u8 unused; |
| 58 | } __attribute__((packed)) options; |
| 59 | __le64 image_size; |
| 60 | __le64 snap_seq; |
| 61 | __le32 snap_count; |
| 62 | __le32 reserved; |
| 63 | __le64 snap_names_len; |
| 64 | struct rbd_image_snap_ondisk snaps[0]; |
| 65 | } __attribute__((packed)); |
| 66 | |
| 67 | |
| 68 | #endif |
| 69 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
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v3.9
