source: mainline/uspace/lib/ext4/libext4_inode.c@ 1114173

/*
 * Copyright (c) 2011 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 libext4
 * @{
 */ 

/**
 * @file        libext4_inode.c
 * @brief       Ext4 inode operations.
 */

#include <byteorder.h>
#include "libext4.h"

uint32_t ext4_inode_get_mode(ext4_superblock_t *sb, ext4_inode_t *inode)
{
        if (ext4_superblock_get_creator_os(sb) == EXT4_SUPERBLOCK_OS_HURD) {
                return ((uint32_t)uint16_t_le2host(inode->osd2.hurd2.mode_high)) << 16 |
                    ((uint32_t)uint16_t_le2host(inode->mode));
        }
        return uint16_t_le2host(inode->mode);
}

bool ext4_inode_is_type(ext4_superblock_t *sb, ext4_inode_t *inode, uint32_t type)
{
        uint32_t mode = ext4_inode_get_mode(sb, inode);
        return (mode & EXT4_INODE_MODE_TYPE_MASK) == type;
}

/*
uint32_t ext4_inode_get_uid(ext4_inode_t *inode)
*/

uint64_t ext4_inode_get_size(ext4_superblock_t *sb, ext4_inode_t *inode)
{
        uint32_t major_rev = ext4_superblock_get_rev_level(sb);

        if (major_rev > 0 && ext4_inode_is_type(sb, inode, EXT4_INODE_MODE_FILE)) {
                return ((uint64_t)uint32_t_le2host(inode->size_hi)) << 32 |
                            ((uint64_t)uint32_t_le2host(inode->size_lo));
                }
        return uint32_t_le2host(inode->size_lo);
}

/*
extern uint32_t ext4_inode_get_access_time(ext4_inode_t *);
extern uint32_t ext4_inode_get_change_inode_time(ext4_inode_t *);
extern uint32_t ext4_inode_get_modification_time(ext4_inode_t *);
extern uint32_t ext4_inode_get_deletion_time(ext4_inode_t *);
extern uint32_t ext4_inode_get_gid(ext4_inode_t *);
*/

uint16_t ext4_inode_get_links_count(ext4_inode_t *inode)
{
        return uint16_t_le2host(inode->links_count);
}

/*
extern uint64_t ext4_inode_get_blocks_count(ext4_inode_t *);
extern uint32_t ext4_inode_get_flags(ext4_inode_t *);
*/

uint32_t ext4_inode_get_direct_block(ext4_inode_t *inode, uint8_t idx)
{
        assert(idx < EXT4_INODE_DIRECT_BLOCK_COUNT);
        return uint32_t_le2host(inode->blocks[idx]);
}

uint32_t ext4_inode_get_indirect_block(ext4_inode_t *inode, uint8_t idx)
{
        assert(idx < EXT4_INODE_INDIRECT_BLOCK_COUNT);
        return uint32_t_le2host(inode->blocks[idx + EXT4_INODE_INDIRECT_BLOCK]);
}

/**
 * @}
 */