86 lines
2.8 KiB
C
86 lines
2.8 KiB
C
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/*
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* Copyright (c) 2013 Grzegorz Kostka (kostka.grzegorz@gmail.com)
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*
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*
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* HelenOS:
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* Copyright (c) 2012 Martin Sucha
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* Copyright (c) 2012 Frantisek Princ
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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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*
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* - 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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* - 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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* - The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/** @addtogroup lwext4
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* @{
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*/
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/**
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* @file ext4_ialloc.c
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* @brief Inode allocation procedures.
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*/
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#ifndef EXT4_IALLOC_H_
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#define EXT4_IALLOC_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <ext4_config.h>
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#include <ext4_types.h>
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/**@brief Calculate and set checksum of inode bitmap.
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* @param sb superblock pointer.
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* @param bg block group
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* @param bitmap bitmap buffer
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*/
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void ext4_ialloc_set_bitmap_csum(struct ext4_sblock *sb, struct ext4_bgroup *bg,
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void *bitmap);
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/**@brief Free i-node number and modify filesystem data structers.
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* @param fs Filesystem, where the i-node is located
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* @param index Index of i-node to be release
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* @param is_dir Flag us for information whether i-node is directory or not
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*/
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int ext4_ialloc_free_inode(struct ext4_fs *fs, uint32_t index, bool is_dir);
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/**@brief I-node allocation algorithm.
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* This is more simple algorithm, than Orlov allocator used
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* in the Linux kernel.
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* @param fs Filesystem to allocate i-node on
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* @param index Output value - allocated i-node number
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* @param is_dir Flag if allocated i-node will be file or directory
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* @return Error code
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*/
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int ext4_ialloc_alloc_inode(struct ext4_fs *fs, uint32_t *index, bool is_dir);
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#ifdef __cplusplus
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}
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#endif
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#endif /* EXT4_IALLOC_H_ */
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/**
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* @}
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*/
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