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/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* serialize_fstree.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#include "config.h"
#include "sqfs/meta_writer.h"
#include "highlevel.h"
#include "util.h"
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
static sqfs_inode_generic_t *write_dir_entries(sqfs_dir_writer_t *dirw,
tree_node_t *node,
sqfs_id_table_t *idtbl)
{
sqfs_u32 xattr, parent_inode;
sqfs_inode_generic_t *inode;
tree_node_t *it;
int ret;
if (sqfs_dir_writer_begin(dirw))
return NULL;
for (it = node->data.dir.children; it != NULL; it = it->next) {
ret = sqfs_dir_writer_add_entry(dirw, it->name, it->inode_num,
it->inode_ref, it->mode);
if (ret)
return NULL;
}
if (sqfs_dir_writer_end(dirw))
return NULL;
xattr = node->xattr_idx;
parent_inode = (node->parent == NULL) ? 0 : node->parent->inode_num;
inode = sqfs_dir_writer_create_inode(dirw, 0, xattr, parent_inode);
if (inode == NULL) {
perror("creating inode");
return NULL;
}
if (sqfs_id_table_id_to_index(idtbl, node->uid, &inode->base.uid_idx))
goto fail_id;
if (sqfs_id_table_id_to_index(idtbl, node->gid, &inode->base.gid_idx))
goto fail_id;
inode->base.mode = node->mode;
inode->base.mod_time = node->mod_time;
inode->base.inode_number = node->inode_num;
return inode;
fail_id:
fputs("failed to allocate IDs\n", stderr);
free(inode);
return NULL;
}
int sqfs_serialize_fstree(sqfs_file_t *file, sqfs_super_t *super, fstree_t *fs,
sqfs_compressor_t *cmp, sqfs_id_table_t *idtbl)
{
sqfs_inode_generic_t *inode;
sqfs_meta_writer_t *im, *dm;
sqfs_dir_writer_t *dirwr;
sqfs_u32 offset;
sqfs_u64 block;
int ret = -1;
size_t i;
im = sqfs_meta_writer_create(file, cmp, 0);
if (im == NULL)
return -1;
dm = sqfs_meta_writer_create(file, cmp,
SQFS_META_WRITER_KEEP_IN_MEMORY);
if (dm == NULL)
goto out_im;
dirwr = sqfs_dir_writer_create(dm);
if (dirwr == NULL)
goto out_dm;
super->inode_table_start = file->get_size(file);
for (i = 0; i < fs->inode_tbl_size; ++i) {
if (S_ISDIR(fs->inode_table[i]->mode)) {
inode = write_dir_entries(dirwr, fs->inode_table[i],
idtbl);
} else {
inode = tree_node_to_inode(idtbl, fs->inode_table[i]);
}
if (inode == NULL)
goto out;
sqfs_meta_writer_get_position(im, &block, &offset);
fs->inode_table[i]->inode_ref = (block << 16) | offset;
if (sqfs_meta_writer_write_inode(im, inode)) {
free(inode);
goto out;
}
if (inode->base.type == SQFS_INODE_EXT_DIR) {
if (sqfs_dir_writer_write_index(dirwr, im)) {
free(inode);
goto out;
}
}
free(inode);
}
if (sqfs_meta_writer_flush(im))
goto out;
if (sqfs_meta_writer_flush(dm))
goto out;
super->root_inode_ref = fs->root->inode_ref;
super->directory_table_start = file->get_size(file);
if (sqfs_meta_write_write_to_file(dm))
goto out;
ret = 0;
out:
sqfs_dir_writer_destroy(dirwr);
out_dm:
sqfs_meta_writer_destroy(dm);
out_im:
sqfs_meta_writer_destroy(im);
return ret;
}
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