ref: 67547995f1a63bb312be700b79cf14740cea7e1a
dir: /include/ext4_ialloc.h/
/*
* Copyright (c) 2013 Grzegorz Kostka (kostka.grzegorz@gmail.com)
*
*
* HelenOS:
* Copyright (c) 2012 Martin Sucha
* Copyright (c) 2012 Frantisek Princ
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, 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 DAMAGE.
*/
/** @addtogroup lwext4
* @{
*/
/**
* @file ext4_ialloc.c
* @brief Inode allocation procedures.
*/
#ifndef EXT4_IALLOC_H_
#define EXT4_IALLOC_H_
#ifdef __cplusplus
extern "C" {
#endif
#include <ext4_config.h>
#include <ext4_types.h>
/**@brief Calculate and set checksum of inode bitmap.
* @param sb superblock pointer.
* @param bg block group
* @param bitmap bitmap buffer
*/
void ext4_ialloc_set_bitmap_csum(struct ext4_sblock *sb, struct ext4_bgroup *bg,
void *bitmap);
/**@brief Free i-node number and modify filesystem data structers.
* @param fs Filesystem, where the i-node is located
* @param index Index of i-node to be release
* @param is_dir Flag us for information whether i-node is directory or not
*/
int ext4_ialloc_free_inode(struct ext4_fs *fs, uint32_t index, bool is_dir);
/**@brief I-node allocation algorithm.
* This is more simple algorithm, than Orlov allocator used
* in the Linux kernel.
* @param fs Filesystem to allocate i-node on
* @param index Output value - allocated i-node number
* @param is_dir Flag if allocated i-node will be file or directory
* @return Error code
*/
int ext4_ialloc_alloc_inode(struct ext4_fs *fs, uint32_t *index, bool is_dir);
#ifdef __cplusplus
}
#endif
#endif /* EXT4_IALLOC_H_ */
/**
* @}
*/