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#ifndef __EB_CHAIN_H__
#define __EB_CHAIN_H__
/*
* Copyright (c) International Business Machines Corp., 2006
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
* the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* Author: Drake Dowsett
* Contact: Andreas Arnez (arnez@de.ibm.com)
*
* Eraseblock Chain
*
* A linked list structure to order eraseblocks by volume and logical number
* and to update by version number. Doesn't contain actual eraseblock data
* but rather the erasecounter and volume id headers as well as a position
* indicator.
*
* Diagram Example:
*
* [V1.0v0]->[V1.1v2]->[V1.2v1]->[V2.0v2]->[V2.1v0]->[V2.2v1]->NULL
* | | | | | |
* NULL [V1.1v1] [V1.2v0] [V2.0v1] NULL [V2.2v0]
* | | | |
* [V1.1v0] NULL [V2.0v0] NULL
* | |
* NULL NULL
*
* [VA.BvC] represents the eb_info for the eraseblock with the vol_id A,
* lnum B and leb_ver C
* -> represents the `next' pointer
* | represents the `older' pointer
*/
#include <stdio.h>
#include <stdint.h>
#include <mtd/ubi-header.h>
typedef struct eb_info *eb_info_t;
struct eb_info {
struct ubi_ec_hdr outer;
struct ubi_vid_hdr inner;
fpos_t eb_top;
uint32_t linear;
eb_info_t next;
eb_info_t older;
};
int eb_chain_insert(eb_info_t *head, eb_info_t item);
int eb_chain_position(eb_info_t *head, uint32_t vol_id, uint32_t *lnum,
eb_info_t *pos);
int eb_chain_print(FILE *stream, eb_info_t *head);
int eb_chain_destroy(eb_info_t *head);
#endif /* __EB_CHAIN_H__ */
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