105 lines
3.4 KiB
C
105 lines
3.4 KiB
C
/**
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* \addtogroup cfs
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* @{
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*/
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/*
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* Copyright (c) 2008, Swedish Institute of Computer Science
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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*/
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#ifndef CFS_COFFEE_H
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#define CFS_COFFEE_H
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/**
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* \file
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* Header for the Coffee file system.
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* \author
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* Nicolas Tsiftes <nvt@sics.se>
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*
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* \name Functions called from application programs
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* @{
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*/
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/**
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* \brief Reserve space for a file.
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* \param name The filename.
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* \param size The size of the file.
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* \return 0 on success, -1 on failure.
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*
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* Coffee uses sequential page structures for append-only files. The
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* sequential structure can be reserved with a certain. If no reservation
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* has been done, files will be set to a default size once opened for
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* the first time.
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*/
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int cfs_coffee_reserve(const char *name, uint32_t size);
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/**
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* \brief Configure the on-demand log file.
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* \param file
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* \param log_size
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* \param log_entry_size
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* \return 0 on success, -1 on failure.
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*
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* When file data is first modified, Coffee creates a micro log for the
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* file. The micro log stores a table of modifications where each record
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* is of log_entry_size.
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*/
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int cfs_coffee_configure_log(const char *file, unsigned log_size,
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unsigned log_entry_size);
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/**
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* \brief Format the storage area assigned to Coffee.
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* \return 0 on success, -1 on failure.
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*
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* Coffee formats the underlying storage by setting all bits to zero.
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* This operation is required prior to using Coffee for the first time
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* in a system.
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*/
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int cfs_coffee_format(void);
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/**
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* \brief Gives information about the file descriptor area in Coffee.
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* \param size
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* \return A pointer to the file descriptor set.
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*
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* This function returns the file descriptor set and sets the size
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* argument to the number of bytes that the set uses. Mainly used for
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* sensornet checkpointing to protect the file descriptor while rolling
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* back the state from a file.
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*/
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void *cfs_coffee_get_fd_set(unsigned *size);
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/** @} */
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/** @} */
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#endif /* !COFFEE_H */
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