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sys/dev/bhnd/nvram/bhnd_nvram_storevar.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_STOREVAR_H_ | |||||
#define _BHND_NVRAM_BHND_NVRAM_STOREVAR_H_ | |||||
#include <sys/types.h> | |||||
#ifndef _KERNEL | |||||
#include <pthread.h> | |||||
#endif | |||||
#include "bhnd_nvram_store.h" | |||||
/** Index is only generated if minimum variable count is met */ | |||||
#define NVRAM_IDX_VAR_THRESH 15 | |||||
#define BHND_NVSTORE_PATH_ALIAS_NONE ULONG_MAX | |||||
LIST_HEAD(bhnd_nvstore_paths, bhnd_nvstore_path); | |||||
/** | |||||
* NVRAM store path. | |||||
*/ | |||||
struct bhnd_nvstore_path { | |||||
char *path; /** relative path */ | |||||
u_long index; /** aliased path index, or | |||||
BHND_NVSTORE_PATH_IDX_INVALID */ | |||||
LIST_ENTRY(bhnd_nvstore_path) dp_link; | |||||
}; | |||||
/** | |||||
* NVRAM store index. | |||||
* | |||||
* Provides effecient name-based lookup by maintaining an array of cached | |||||
* cookiep values, sorted lexicographically by variable name. | |||||
*/ | |||||
struct bhnd_nvstore_index { | |||||
size_t num_cookiep; /**< cookiep count */ | |||||
void *cookiep[]; /**< cookiep values */ | |||||
}; | |||||
/** bhnd nvram store instance state */ | |||||
struct bhnd_nvram_store { | |||||
#ifdef _KERNEL | |||||
struct mtx mtx; | |||||
#else | |||||
pthread_mutex_t mtx; | |||||
#endif | |||||
struct bhnd_nvram_data *nv; /**< backing data */ | |||||
struct bhnd_nvstore_index *idx; /**< index, or NULL */ | |||||
struct bhnd_nvstore_paths paths; /**< paths */ | |||||
nvlist_t *pending; /**< uncommitted writes */ | |||||
}; | |||||
#ifdef _KERNEL | |||||
#define BHND_NVSTORE_LOCK_INIT(sc) \ | |||||
mtx_init(&(sc)->mtx, "BHND NVRAM store lock", NULL, MTX_DEF) | |||||
#define BHND_NVSTORE_LOCK(sc) mtx_lock(&(sc)->mtx) | |||||
#define BHND_NVSTORE_UNLOCK(sc) mtx_unlock(&(sc)->mtx) | |||||
#define BHND_NVSTORE_LOCK_ASSERT(sc, what) mtx_assert(&(sc)->mtx, what) | |||||
#define BHND_NVSTORE_LOCK_DESTROY(sc) mtx_destroy(&(sc)->mtx) | |||||
#else /* !_KERNEL */ | |||||
#define BHND_NVSTORE_LOCK_INIT(sc) do { \ | |||||
int error = pthread_mutex_init(&(sc)->mtx, NULL); \ | |||||
if (error) \ | |||||
BHND_NV_PANIC("pthread_mutex_init() failed: %d", \ | |||||
error); \ | |||||
} while(0) | |||||
#define BHND_NVSTORE_LOCK(sc) pthread_mutex_lock(&(sc)->mtx) | |||||
#define BHND_NVSTORE_UNLOCK(sc) pthread_mutex_unlock(&(sc)->mtx) | |||||
#define BHND_NVSTORE_LOCK_DESTROY(sc) pthread_mutex_destroy(&(sc)->mtx) | |||||
#define BHND_NVSTORE_LOCK_ASSERT(sc, what) | |||||
#endif /* _KERNEL */ | |||||
#endif /* _BHND_NVRAM_BHND_NVRAM_STOREVAR_H_ */ |