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/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* tree_node_from_inode.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#include "config.h"
#include "highlevel.h"
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
static size_t compute_size(sqfs_inode_generic_t *inode, const char *name)
{
size_t size = sizeof(tree_node_t) + strlen(name) + 1;
switch (inode->base.type) {
case SQFS_INODE_DIR:
case SQFS_INODE_EXT_DIR:
size += sizeof(dir_info_t);
break;
case SQFS_INODE_FILE:
case SQFS_INODE_EXT_FILE:
size += sizeof(file_info_t);
size += inode->num_file_blocks *
sizeof(((file_info_t *)0)->blocks[0]);
break;
case SQFS_INODE_SLINK:
case SQFS_INODE_EXT_SLINK:
size += strlen(inode->slink_target) + 1;
break;
default:
break;
}
return size;
}
static void copy_block_sizes(sqfs_inode_generic_t *inode, tree_node_t *out,
size_t block_size)
{
size_t i;
if ((out->data.file->size % block_size) != 0) {
if (out->data.file->fragment != 0xFFFFFFFF &&
out->data.file->fragment_offset != 0xFFFFFFFF) {
out->data.file->flags |= FILE_FLAG_HAS_FRAGMENT;
}
}
out->name += inode->num_file_blocks *
sizeof(out->data.file->blocks[0]);
for (i = 0; i < inode->num_file_blocks; ++i)
out->data.file->blocks[i].size = inode->block_sizes[i];
}
tree_node_t *tree_node_from_inode(sqfs_inode_generic_t *inode,
const id_table_t *idtbl,
const char *name,
size_t block_size)
{
tree_node_t *out;
out = calloc(1, compute_size(inode, name));
if (out == NULL) {
perror("converting inode to fs tree node");
return NULL;
}
if (id_table_index_to_id(idtbl, inode->base.uid_idx, &out->uid)) {
free(out);
return NULL;
}
if (id_table_index_to_id(idtbl, inode->base.gid_idx, &out->gid)) {
free(out);
return NULL;
}
out->mode = inode->base.mode;
out->inode_num = inode->base.inode_number;
out->mod_time = inode->base.mod_time;
out->name = (char *)out->payload;
switch (inode->base.type) {
case SQFS_INODE_DIR:
out->data.dir = (dir_info_t *)out->payload;
out->name += sizeof(dir_info_t);
out->data.dir->size = inode->data.dir.size;
out->data.dir->start_block = inode->data.dir.start_block;
out->data.dir->block_offset = inode->data.dir.offset;
break;
case SQFS_INODE_EXT_DIR:
out->data.dir = (dir_info_t *)out->payload;
out->name += sizeof(dir_info_t);
out->data.dir->size = inode->data.dir_ext.size;
out->data.dir->start_block = inode->data.dir_ext.start_block;
out->data.dir->block_offset = inode->data.dir_ext.offset;
break;
case SQFS_INODE_FILE:
out->data.file = (file_info_t *)out->payload;
out->name += sizeof(file_info_t);
out->data.file->size = inode->data.file.file_size;
out->data.file->startblock = inode->data.file.blocks_start;
out->data.file->fragment = inode->data.file.fragment_index;
out->data.file->fragment_offset =
inode->data.file.fragment_offset;
copy_block_sizes(inode, out, block_size);
break;
case SQFS_INODE_EXT_FILE:
out->data.file = (file_info_t *)out->payload;
out->name += sizeof(file_info_t);
out->data.file->size = inode->data.file_ext.file_size;
out->data.file->sparse = inode->data.file_ext.sparse;
out->data.file->startblock = inode->data.file_ext.blocks_start;
out->data.file->fragment = inode->data.file_ext.fragment_idx;
out->data.file->fragment_offset =
inode->data.file_ext.fragment_offset;
copy_block_sizes(inode, out, block_size);
break;
case SQFS_INODE_SLINK:
case SQFS_INODE_EXT_SLINK:
out->data.slink_target = (char *)out->payload;
strcpy(out->data.slink_target, inode->slink_target);
out->name = (char *)out->payload +
strlen(inode->slink_target) + 1;
break;
case SQFS_INODE_BDEV:
case SQFS_INODE_CDEV:
out->name = (char *)out->payload;
out->data.devno = inode->data.dev.devno;
break;
case SQFS_INODE_EXT_BDEV:
case SQFS_INODE_EXT_CDEV:
out->name = (char *)out->payload;
out->data.devno = inode->data.dev_ext.devno;
break;
default:
break;
}
strcpy(out->name, name);
return out;
}
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