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109 lines
3.7 KiB
C
109 lines
3.7 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* (SEA)ttle i(MA)ge is the image which used in project seattle.
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*
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* Created by David Hsieh <david_hsieh@alphanetworks.com>
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* Copyright (C) 2008-2009 Alpha Networks, Inc.
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*
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* This file 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 as published by the Free Software Foundation; either'
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* version 2.1 of the License, or (at your option) any later version.
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*
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* The GNU C Library is distributed in the hope that it will be useful,'
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with the GNU C Library; if not, write to the Free
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* Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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* 02111-1307 USA.
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*/
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#ifndef __SEAMA_HEADER_FILE__
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#define __SEAMA_HEADER_FILE__
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#include <stdint.h>
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#define SEAMA_MAGIC 0x5EA3A417
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/*
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* SEAMA looks like the following map.
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* All the data of the header should be in network byte order.
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*
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* +-------------+-------------+------------
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* | SEAMA magic | ^
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* +-------------+-------------+ |
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* | reserved | meta size | |
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* +-------------+-------------+ header
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* | image size (0 bytes) | |
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* +-------------+-------------+ |
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* ~ Meta data ~ v
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* +-------------+-------------+------------
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* | SEAMA magic | ^ ^
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* +-------------+-------------+ | |
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* | reserved | meta size | | |
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* +-------------+-------------+ | |
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* | image size | | |
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* +-------------+-------------+ header |
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* | | | |
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* | 16 bytes of MD5 digest | | |
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* | | | |
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* | | | |
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* +-------------+-------------+ | |
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* ~ Meta data ~ v |
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* +-------------+-------------+------- |
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* | | |
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* | Image of the 1st entity | |
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* ~ ~ 1st entity
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* | | |
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* | | v
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* +-------------+-------------+-------------
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* | SEAMA magic | ^ ^
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* +-------------+-------------+ | |
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* | reserved | meta size | | |
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* +-------------+-------------+ | |
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* | image size | | |
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* +-------------+-------------+ header |
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* | | | |
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* | 16 bytes of MD5 digest | | |
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* | | | |
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* | | | |
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* +-------------+-------------+ | |
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* ~ Meta data ~ v |
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* +-------------+-------------+------- |
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* | | |
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* | Image of the 2nd entity | |
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* ~ ~ 2nd entity
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* | | |
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* | | v
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* +-------------+-------------+-------------
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*/
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/*
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* SEAMA header
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*
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* |<-------- 32 bits -------->|
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* +-------------+-------------+
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* | SEAMA magic |
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* +-------------+-------------+
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* | reserved | meta size |
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* +-------------+-------------+
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* | image size |
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* +-------------+-------------+
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*/
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/* seama header */
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typedef struct seama_hdr seamahdr_t;
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struct seama_hdr
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{
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uint32_t magic; /* should always be SEAMA_MAGIC. */
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uint16_t reserved; /* reserved for */
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uint16_t metasize; /* size of the META data */
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uint32_t size; /* size of the image */
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} __attribute__ ((packed));
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#endif
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