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libffs.h
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libffs.h
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/* Copyright 2013-2014 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __LIBFFS_H
#define __LIBFFS_H
#include <libflash/libflash.h>
#include <libflash/blocklevel.h>
/* FFS handle, opaque */
struct ffs_handle;
struct ffs_hdr;
struct ffs_entry;
struct ffs_entry_user;
/**
* struct ffs_entry_user - User data entries
*
* Usable in memory representation of a struct __ffs_entry_user
*
* @chip: Chip Select (0,1)
* @compressType: Compression Indication/alg (0=not compressed)
* @dataInteg: Indicates Data Integrity mechanism
* @verCheck: Indicates Version check type
* @miscFlags: Misc Partition related Flags
*/
struct ffs_entry_user {
uint8_t chip;
uint8_t compresstype;
uint16_t datainteg;
uint8_t vercheck;
uint8_t miscflags;
};
/* Error codes:
*
* < 0 = flash controller errors
* 0 = success
* > 0 = libffs / libflash errors
*/
#define FFS_ERR_BAD_MAGIC 100
#define FFS_ERR_BAD_VERSION 101
#define FFS_ERR_BAD_CKSUM 102
#define FFS_ERR_PART_NOT_FOUND 103
#define FFS_ERR_BAD_ECC 104
#define FFS_ERR_BAD_SIZE 105
#define FFS_ERR_BAD_PART_NAME 106
#define FFS_ERR_BAD_PART_BASE 107
#define FFS_ERR_BAD_PART_SIZE 108
#define FFS_ERR_BAD_PART_PID 109
/* The maximum length of the partition name */
#define FFS_PART_NAME_MAX 15
/* Old version of the name DEPRECATED */
#define PART_NAME_MAX 15
/*
* Flag bit definitions
*/
#define FFS_FLAGS_PROTECTED 0x0001
#define FFS_FLAGS_U_BOOT_ENV 0x0002
/* Data integrity flags */
#define FFS_ENRY_INTEG_ECC 0x8000
/*
* User verCheck definitions
*/
#define FFS_VERCHECK_SHA512V 0x80
#define FFS_VERCHECK_SHA512EC 0x40
/*
* User miscFlags
*/
#define FFS_MISCFLAGS_PRESERVED 0x80
#define FFS_MISCFLAGS_READONLY 0x40
#define FFS_MISCFLAGS_BACKUP 0x20
#define FFS_MISCFLAGS_REPROVISION 0x10
bool has_ecc(struct ffs_entry *ent);
bool has_flag(struct ffs_entry *ent, uint16_t flag);
/* Init */
int ffs_init(uint32_t offset, uint32_t max_size, struct blocklevel_device *bl,
struct ffs_handle **ffs, bool mark_ecc);
/*
* Initialise a new ffs_handle to the "OTHER SIDE".
* Reuses the underlying blocklevel_device.
*/
int ffs_next_side(struct ffs_handle *ffs, struct ffs_handle **new_ffs,
bool mark_ecc);
/*
* There are quite a few ways one might consider two ffs_handles to be the
* same. For the purposes of this function we are trying to detect a fairly
* specific scenario:
* Consecutive calls to ffs_next_side() may succeed but have gone circular.
* It is possible that the OTHER_SIDE partition in one TOC actually points
* back to the TOC of the first ffs_handle.
* This function compares for this case, therefore the requirements are
* simple, the underlying blocklevel_devices must be the same along with
* the toc_offset and the max_size.
*/
bool ffs_equal(struct ffs_handle *one, struct ffs_handle *two);
void ffs_close(struct ffs_handle *ffs);
int ffs_lookup_part(struct ffs_handle *ffs, const char *name,
uint32_t *part_idx);
int ffs_part_info(struct ffs_handle *ffs, uint32_t part_idx,
char **name, uint32_t *start,
uint32_t *total_size, uint32_t *act_size, bool *ecc);
struct ffs_entry *ffs_entry_get(struct ffs_handle *ffs, uint32_t index);
int ffs_update_act_size(struct ffs_handle *ffs, uint32_t part_idx,
uint32_t act_size);
int ffs_hdr_new(uint32_t size, uint32_t block_size, uint32_t block_count,
struct ffs_hdr **r);
int ffs_hdr_add_side(struct ffs_hdr *hdr);
int ffs_entry_new(const char *name, uint32_t base, uint32_t size, struct ffs_entry **r);
int ffs_entry_user_set(struct ffs_entry *ent, struct ffs_entry_user *user);
int ffs_entry_add(struct ffs_hdr *hdr, struct ffs_entry *entry, unsigned int side);
int ffs_hdr_create_backup(struct ffs_hdr *hdr);
int ffs_hdr_finalise(struct blocklevel_device *bl, struct ffs_hdr *hdr);
int ffs_hdr_free(struct ffs_hdr *hdr);
#endif /* __LIBFFS_H */