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sys/dev/bhnd/nvram/bhnd_nvram_parservar.h
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/*- | |||||
* Copyright (c) 2015-2016 Landon Fuller <landonf@FreeBSD.org> | |||||
* All rights reserved. | |||||
* | |||||
* Redistribution and use in source and binary forms, with or without | |||||
* modification, are permitted provided that the following conditions | |||||
* are met: | |||||
* 1. Redistributions of source code must retain the above copyright | |||||
* notice, this list of conditions and the following disclaimer, | |||||
* without modification. | |||||
* 2. Redistributions in binary form must reproduce at minimum a disclaimer | |||||
* similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any | |||||
* redistribution must be conditioned upon including a substantially | |||||
* similar Disclaimer requirement for further binary redistribution. | |||||
* | |||||
* NO WARRANTY | |||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |||||
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |||||
* LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY | |||||
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL | |||||
* THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, | |||||
* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |||||
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |||||
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER | |||||
* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |||||
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF | |||||
* THE POSSIBILITY OF SUCH DAMAGES. | |||||
* | |||||
* $FreeBSD$ | |||||
*/ | |||||
#ifndef _BHND_NVRAM_BHND_NVRAM_PARSERVAR_H_ | |||||
#define _BHND_NVRAM_BHND_NVRAM_PARSERVAR_H_ | |||||
#include <sys/types.h> | |||||
#include "bhnd_nvram_common.h" | |||||
#include "bhnd_nvram_parser.h" | |||||
#define NVRAM_IDX_VAR_THRESH 15 /**< index is generated if minimum variable count is met */ | |||||
#define NVRAM_IDX_OFFSET_MAX UINT16_MAX /**< maximum indexable offset */ | |||||
#define NVRAM_IDX_LEN_MAX UINT8_MAX /**< maximum indexable key/value length */ | |||||
#define NVRAM_KEY_MAX 64 /**< maximum key length (not incl. NUL) */ | |||||
#define NVRAM_VAL_MAX 255 /**< maximum value length (not incl. NUL) */ | |||||
#define NVRAM_DEVPATH_STR "devpath" /**< name prefix of device path aliases */ | |||||
#define NVRAM_DEVPATH_LEN (sizeof(NVRAM_DEVPATH_STR) - 1) | |||||
#define NVRAM_SMALL_HASH_SIZE 16 /**< hash table size for pending/default tuples */ | |||||
/** | |||||
* NVRAM devpath record. | |||||
* | |||||
* Aliases index values to full device paths. | |||||
*/ | |||||
struct bhnd_nvram_devpath { | |||||
u_long index; /** alias index */ | |||||
char *path; /** aliased path */ | |||||
LIST_ENTRY(bhnd_nvram_devpath) dp_link; | |||||
}; | |||||
/** | |||||
* NVRAM index record. | |||||
* | |||||
* Provides entry offsets into a backing NVRAM buffer. | |||||
*/ | |||||
struct bhnd_nvram_idx_entry { | |||||
uint16_t env_offset; /**< offset to env string */ | |||||
uint8_t key_len; /**< key length */ | |||||
uint8_t val_len; /**< value length */ | |||||
}; | |||||
/** | |||||
* NVRAM index. | |||||
* | |||||
* Provides a compact binary search index into the backing NVRAM buffer. | |||||
*/ | |||||
struct bhnd_nvram_idx { | |||||
size_t num_entries; /**< entry count */ | |||||
struct bhnd_nvram_idx_entry entries[]; /**< index entries */ | |||||
}; | |||||
#endif /* _BHND_NVRAM_BHND_NVRAM_PARSERVAR_H_ */ |