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/* SPDX-License-Identifier: GPL-3.0-or-later */
#include "unsquashfs.h"
static size_t compute_size(sqfs_inode_generic_t *inode, const char *name,
size_t block_size)
{
size_t size = sizeof(tree_node_t) + strlen(name) + 1;
size_t block_count = 0;
switch (inode->base.type) {
case SQFS_INODE_DIR:
case SQFS_INODE_EXT_DIR:
size += sizeof(dir_info_t);
break;
case SQFS_INODE_FILE:
size += sizeof(file_info_t);
block_count = inode->data.file.file_size / block_size;
break;
case SQFS_INODE_EXT_FILE:
size += sizeof(file_info_t);
block_count = inode->data.file_ext.file_size / block_size;
break;
case SQFS_INODE_SLINK:
case SQFS_INODE_EXT_SLINK:
size += strlen(inode->slink_target) + 1;
break;
default:
break;
}
return size + block_count * sizeof(uint32_t);
}
static void copy_block_sizes(sqfs_inode_generic_t *inode, tree_node_t *out,
size_t block_size)
{
size_t block_count = out->data.file->size / block_size;
out->name += block_count * sizeof(uint32_t);
if (block_count) {
memcpy(out->data.file->blocksizes, inode->block_sizes,
block_count * sizeof(uint32_t));
}
}
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;
if (inode->base.uid_idx >= idtbl->num_ids) {
fputs("converting inode to fs tree node: UID out of range\n",
stderr);
return NULL;
}
if (inode->base.gid_idx >= idtbl->num_ids) {
fputs("converting inode to fs tree node: GID out of range\n",
stderr);
return NULL;
}
out = calloc(1, compute_size(inode, name, block_size));
if (out == NULL) {
perror("converting inode to fs tree node");
return NULL;
}
out->uid = idtbl->ids[inode->base.uid_idx];
out->gid = idtbl->ids[inode->base.gid_idx];
out->mode = inode->base.mode;
out->type = inode->base.type;
out->inode_num = inode->base.inode_number;
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->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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