1/* vi: set sw=4 ts=4: */
2/*
3 *	(SEA)ttle i(MA)ge is the image which used in project seattle.
4 *
5 *	Created by David Hsieh <david_hsieh@alphanetworks.com>
6 *	Copyright (C) 2008-2009 Alpha Networks, Inc.
7 *
8 *	This file is free software; you can redistribute it and/or
9 *	modify it under the terms of the GNU Lesser General Public
10 *	License as published by the Free Software Foundation; either'
11 *	version 2.1 of the License, or (at your option) any later version.
12 *
13 *	The GNU C Library is distributed in the hope that it will be useful,'
14 *	but WITHOUT ANY WARRANTY; without even the implied warranty of
15 *	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16 *	Lesser General Public License for more details.
17 *
18 *	You should have received a copy of the GNU Lesser General Public
19 *	License along with the GNU C Library; if not, write to the Free
20 *	Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
21 *	02111-1307 USA.
22 */
23
24#ifndef __SEAMA_HEADER_FILE__
25#define __SEAMA_HEADER_FILE__
26
27#include <stdint.h>
28
29#define SEAMA_MAGIC		0x5EA3A417
30
31/*
32 *	SEAMA looks like the following map.
33 *	All the data of the header should be in network byte order.
34 *
35 *  +-------------+-------------+------------
36 *	| SEAMA magic               |     ^
37 *  +-------------+-------------+     |
38 *	| reserved    | meta size   |     |
39 *  +-------------+-------------+   header
40 *	| image size (0 bytes)      |     |
41 *  +-------------+-------------+     |
42 *	~ Meta data                 ~     v
43 *  +-------------+-------------+------------
44 *	| SEAMA magic               |   ^     ^
45 *  +-------------+-------------+   |     |
46 *	| reserved    | meta size   |   |     |
47 *  +-------------+-------------+   |     |
48 *	| image size                |   |     |
49 *  +-------------+-------------+ header  |
50 *	|                           |   |     |
51 *	| 16 bytes of MD5 digest    |   |     |
52 *	|                           |   |     |
53 *	|                           |   |     |
54 *  +-------------+-------------+   |     |
55 *	~ Meta data                 ~   v     |
56 *  +-------------+-------------+-------  |
57 *	|                           |         |
58 *	| Image of the 1st entity   |         |
59 *	~                           ~ 1st entity
60 *	|                           |         |
61 *	|                           |         v
62 *  +-------------+-------------+-------------
63 *	| SEAMA magic               |   ^     ^
64 *  +-------------+-------------+   |     |
65 *	| reserved    | meta size   |   |     |
66 *  +-------------+-------------+   |     |
67 *	| image size                |   |     |
68 *  +-------------+-------------+ header  |
69 *	|                           |   |     |
70 *	| 16 bytes of MD5 digest    |   |     |
71 *	|                           |   |     |
72 *	|                           |   |     |
73 *  +-------------+-------------+   |     |
74 *	~ Meta data                 ~   v     |
75 *  +-------------+-------------+-------  |
76 *	|                           |         |
77 *	| Image of the 2nd entity   |         |
78 *	~                           ~ 2nd entity
79 *	|                           |         |
80 *	|                           |         v
81 *  +-------------+-------------+-------------
82 */
83
84
85/*
86 *	SEAMA header
87 *
88 *	|<-------- 32 bits -------->|
89 *  +-------------+-------------+
90 *	| SEAMA magic               |
91 *  +-------------+-------------+
92 *	| reserved    | meta size   |
93 *  +-------------+-------------+
94 *	| image size                |
95 *  +-------------+-------------+
96 */
97/* seama header */
98typedef struct seama_hdr	seamahdr_t;
99struct seama_hdr
100{
101	uint32_t	magic;			/* should always be SEAMA_MAGIC. */
102	uint16_t	reserved;		/* reserved for  */
103	uint16_t	metasize;		/* size of the META data */
104	uint32_t	size;			/* size of the image */
105} __attribute__ ((packed));
106
107
108#endif
109