/* * 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: Artem B. Bityutskiy * * UBI (Unsorted Block Images) library. */ #ifndef __LIBUBI_H__ #define __LIBUBI_H__ #include #include #include #include #ifdef __cplusplus extern "C" { #endif /* UBI version libubi is made for */ #define LIBUBI_UBI_VERSION 1 /* UBI library descriptor */ typedef void * libubi_t; /** * struct ubi_mkvol_request - volume creation request. * */ struct ubi_mkvol_request { int vol_id; int alignment; long long bytes; int vol_type; const char *name; }; /** * struct ubi_info - general UBI information. * * @dev_count count of UBI devices in system * @lowest_dev_num lowest UBI device number * @highest_dev_num highest UBI device number * @version UBI version */ struct ubi_info { int dev_count; int lowest_dev_num; int highest_dev_num; int version; }; /** * struct ubi_dev_info - UBI device information. * * @vol_count count of volumes on this UBI device * @lowest_vol_num lowest volume number * @highest_vol_num highest volume number * @total_ebs total number of eraseblocks on this UBI device * @avail_ebs how many eraseblocks are not used and available for new * volumes * @total_bytes @total_ebs * @eb_size * @avail_bytes @avail_ebs * @eb_size * @bad_count count of bad eraseblocks * @eb_size size of UBI eraseblock * @max_ec current highest erase counter value * @bad_rsvd how many physical eraseblocks of the underlying flash * device are reserved for bad eraseblocks handling * @max_vol_count maximum count of volumes on this UBI device * @min_io_size minimum input/output size of the UBI device */ struct ubi_dev_info { int dev_num; int vol_count; int lowest_vol_num; int highest_vol_num; int total_ebs; int avail_ebs; long long total_bytes; long long avail_bytes; int bad_count; int eb_size; long long max_ec; int bad_rsvd; int max_vol_count; int min_io_size; }; /** * struct ubi_vol_info - UBI volume information. * * @dev_num UBI device number the volume resides on * @vol_id ID of this volume * @type volume type (%UBI_DYNAMIC_VOLUME or %UBI_STATIC_VOLUME) * @alignment alignemnt of this volume * @data_bytes how many data bytes are stored on this volume (equivalent to * @rsvd_bytes for dynamic volumes) * @rsvd_bytes how many bytes are reserved for this volume * @rsvd_ebs how many eraseblocks are reserved for this volume * @eb_size logical eraseblock size of this volume (may be less then * device's logical eraseblock size due to alignment) * @corrupted the volume is corrupted if this flag is not zero * @name volume name (null-terminated) */ struct ubi_vol_info { int dev_num; int vol_id; int type; int alignment; long long data_bytes; long long rsvd_bytes; int rsvd_ebs; int eb_size; int corrupted; char name[UBI_VOL_NAME_MAX + 1]; }; /** * libubi_open - open UBI library. * * This function initializes and opens the UBI library and returns UBI library * descriptor in case of success and %NULL in case of failure. */ libubi_t libubi_open(void); /** * libubi_close - close UBI library * * @desc UBI library descriptor */ void libubi_close(libubi_t desc); /** * ubi_get_info - get general UBI information. * * @info pointer to the &struct ubi_info object to fill * @desc UBI library descriptor * * This function fills the passed @info object with general UBI information and * returns %0 in case of success and %-1 in case of failure. */ int ubi_get_info(libubi_t desc, struct ubi_info *info); /** * ubi_mkvol - create an UBI volume. * * @desc UBI library descriptor * @node name of the UBI character device to create a volume at * @req UBI volume creation request (defined at ) * * This function creates a UBI volume as described at @req and returns %0 in * case of success and %-1 in case of failure. The assigned volume ID is * returned in @req->vol_id. */ int ubi_mkvol(libubi_t desc, const char *node, struct ubi_mkvol_request *req); /** * ubi_rmvol - remove a UBI volume. * * @desc UBI library descriptor * @node name of the UBI character device to remove a volume from * @vol_id ID of the volume to remove * * This function removes volume @vol_id from UBI device @node and returns %0 in * case of success and %-1 in case of failure. */ int ubi_rmvol(libubi_t desc, const char *node, int vol_id); /** * ubi_rsvol - re-size UBI volume. * * @desc UBI library descriptor * @node name of the UBI character device owning the volume which should be * re-sized * @vol_id volume ID to re-size * @bytes new volume size in bytes * * This function returns %0 in case of success and %-1 in case of error. */ int ubi_rsvol(libubi_t desc, const char *node, int vol_id, long long bytes); /** * ubi_get_dev_info - get UBI device information. * * @desc UBI library descriptor * @node name of the UBI character device to fetch information about * @info pointer to the &struct ubi_dev_info object to fill * * This function fills the passed @info object with UBI device information and * returns %0 in case of success and %-1 in case of failure. */ int ubi_get_dev_info(libubi_t desc, const char *node, struct ubi_dev_info *info); /** * ubi_get_dev_info1 - get UBI device information. * * @desc UBI library descriptor * @dev_num UBI device number to fetch information about * @info pointer to the &struct ubi_dev_info object to fill * * This function is identical to 'ubi_get_dev_info()' except that it accepts UBI * device number, not UBI character device. */ int ubi_get_dev_info1(libubi_t desc, int dev_num, struct ubi_dev_info *info); /** * ubi_get_vol_info - get UBI volume information. * * @desc UBI library descriptor * @node name of the UBI volume character device to fetch information about * @info pointer to the &struct ubi_vol_info object to fill * * This function fills the passed @info object with UBI volume information and * returns %0 in case of success and %-1 in case of failure. */ int ubi_get_vol_info(libubi_t desc, const char *node, struct ubi_vol_info *info); /** * ubi_get_vol_info1 - get UBI volume information. * * @desc UBI library descriptor * @dev_num UBI device number * @vol_id ID of the UBI volume to fetch information about * @info pointer to the &struct ubi_vol_info object to fill * * This function is identical to 'ubi_get_vol_info()' except that it accepts UBI * volume number, not UBI volume character device. */ int ubi_get_vol_info1(libubi_t desc, int dev_num, int vol_id, struct ubi_vol_info *info); /** * ubi_update_start - start UBI volume update. * * @desc UBI library descriptor * @fd volume character devie file descriptor * @bytes how many bytes will be written to the volume * * This function initiates UBI volume update and returns %0 in case of success * and %-1 in case of error. */ int ubi_update_start(libubi_t desc, int fd, long long bytes); #ifdef __cplusplus } #endif #endif /* !__LIBUBI_H__ */