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/* SPDX-License-Identifier: LGPL-3.0-or-later */
/*
* write_inode.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#define SQFS_BUILDING_DLL
#include "config.h"
#include "sqfs/meta_writer.h"
#include "sqfs/error.h"
#include "sqfs/inode.h"
#include "sqfs/dir.h"
#include "compat.h"
#include <string.h>
#include <stdlib.h>
#if defined(_WIN32) || defined(__WINDOWS__)
# include <malloc.h>
# ifdef _MSC_VER
# define alloca _alloca
# endif
#elif defined(HAVE_ALLOCA_H)
# include <alloca.h>
#endif
static int write_block_sizes(sqfs_meta_writer_t *ir,
const sqfs_inode_generic_t *n)
{
sqfs_u32 *sizes;
size_t i;
if (n->payload_bytes_used < sizeof(sizes[0]))
return 0;
if ((n->payload_bytes_used % sizeof(sizes[0])) != 0)
return SQFS_ERROR_CORRUPTED;
sizes = alloca(n->payload_bytes_used);
for (i = 0; i < (n->payload_bytes_used / sizeof(sizes[0])); ++i)
sizes[i] = htole32(n->extra[i]);
return sqfs_meta_writer_append(ir, sizes, n->payload_bytes_used);
}
static int write_dir_index(sqfs_meta_writer_t *ir, const sqfs_u8 *data,
size_t count)
{
sqfs_dir_index_t ent;
size_t len;
int err;
while (count > sizeof(ent)) {
memcpy(&ent, data, sizeof(ent));
data += sizeof(ent);
count -= sizeof(ent);
len = ent.size + 1;
if (len > count)
return SQFS_ERROR_CORRUPTED;
ent.start_block = htole32(ent.start_block);
ent.index = htole32(ent.index);
ent.size = htole32(ent.size);
err = sqfs_meta_writer_append(ir, &ent, sizeof(ent));
if (err)
return err;
err = sqfs_meta_writer_append(ir, data, len);
if (err)
return err;
data += len;
count -= len;
}
return 0;
}
int sqfs_meta_writer_write_inode(sqfs_meta_writer_t *ir,
const sqfs_inode_generic_t *n)
{
sqfs_inode_t base;
int ret;
base.type = htole16(n->base.type);
base.mode = htole16(n->base.mode & ~SQFS_INODE_MODE_MASK);
base.uid_idx = htole16(n->base.uid_idx);
base.gid_idx = htole16(n->base.gid_idx);
base.mod_time = htole32(n->base.mod_time);
base.inode_number = htole32(n->base.inode_number);
ret = sqfs_meta_writer_append(ir, &base, sizeof(base));
if (ret)
return ret;
switch (n->base.type) {
case SQFS_INODE_DIR: {
sqfs_inode_dir_t dir = {
.start_block = htole32(n->data.dir.start_block),
.nlink = htole32(n->data.dir.nlink),
.size = htole16(n->data.dir.size),
.offset = htole16(n->data.dir.offset),
.parent_inode = htole32(n->data.dir.parent_inode),
};
return sqfs_meta_writer_append(ir, &dir, sizeof(dir));
}
case SQFS_INODE_FILE: {
sqfs_inode_file_t file = {
.blocks_start = htole32(n->data.file.blocks_start),
.fragment_index = htole32(n->data.file.fragment_index),
.fragment_offset =
htole32(n->data.file.fragment_offset),
.file_size = htole32(n->data.file.file_size),
};
ret = sqfs_meta_writer_append(ir, &file, sizeof(file));
if (ret)
return ret;
return write_block_sizes(ir, n);
}
case SQFS_INODE_SLINK: {
sqfs_inode_slink_t slink = {
.nlink = htole32(n->data.slink.nlink),
.target_size = htole32(n->data.slink.target_size),
};
ret = sqfs_meta_writer_append(ir, &slink, sizeof(slink));
if (ret)
return ret;
return sqfs_meta_writer_append(ir, n->extra,
n->data.slink.target_size);
}
case SQFS_INODE_BDEV:
case SQFS_INODE_CDEV: {
sqfs_inode_dev_t dev = {
.nlink = htole32(n->data.dev.nlink),
.devno = htole32(n->data.dev.devno),
};
return sqfs_meta_writer_append(ir, &dev, sizeof(dev));
}
case SQFS_INODE_FIFO:
case SQFS_INODE_SOCKET: {
sqfs_inode_ipc_t ipc = {
.nlink = htole32(n->data.ipc.nlink),
};
return sqfs_meta_writer_append(ir, &ipc, sizeof(ipc));
}
case SQFS_INODE_EXT_DIR: {
sqfs_inode_dir_ext_t dir = {
.nlink = htole32(n->data.dir_ext.nlink),
.size = htole32(n->data.dir_ext.size),
.start_block = htole32(n->data.dir_ext.start_block),
.parent_inode = htole32(n->data.dir_ext.parent_inode),
.inodex_count = htole16(n->data.dir_ext.inodex_count),
.offset = htole16(n->data.dir_ext.offset),
.xattr_idx = htole32(n->data.dir_ext.xattr_idx),
};
ret = sqfs_meta_writer_append(ir, &dir, sizeof(dir));
if (ret)
return ret;
return write_dir_index(ir, (const sqfs_u8 *)n->extra,
n->payload_bytes_used);
}
case SQFS_INODE_EXT_FILE: {
sqfs_inode_file_ext_t file = {
.blocks_start = htole64(n->data.file_ext.blocks_start),
.file_size = htole64(n->data.file_ext.file_size),
.sparse = htole64(n->data.file_ext.sparse),
.nlink = htole32(n->data.file_ext.nlink),
.fragment_idx = htole32(n->data.file_ext.fragment_idx),
.fragment_offset =
htole32(n->data.file_ext.fragment_offset),
.xattr_idx = htole32(n->data.file_ext.xattr_idx),
};
ret = sqfs_meta_writer_append(ir, &file, sizeof(file));
if (ret)
return ret;
return write_block_sizes(ir, n);
}
case SQFS_INODE_EXT_SLINK: {
sqfs_inode_slink_t slink = {
.nlink = htole32(n->data.slink_ext.nlink),
.target_size = htole32(n->data.slink_ext.target_size),
};
sqfs_u32 xattr = htole32(n->data.slink_ext.xattr_idx);
ret = sqfs_meta_writer_append(ir, &slink, sizeof(slink));
if (ret)
return ret;
ret = sqfs_meta_writer_append(ir, n->extra,
n->data.slink_ext.target_size);
if (ret)
return ret;
return sqfs_meta_writer_append(ir, &xattr, sizeof(xattr));
}
case SQFS_INODE_EXT_BDEV:
case SQFS_INODE_EXT_CDEV: {
sqfs_inode_dev_ext_t dev = {
.nlink = htole32(n->data.dev_ext.nlink),
.devno = htole32(n->data.dev_ext.devno),
.xattr_idx = htole32(n->data.dev_ext.xattr_idx),
};
return sqfs_meta_writer_append(ir, &dev, sizeof(dev));
}
case SQFS_INODE_EXT_FIFO:
case SQFS_INODE_EXT_SOCKET: {
sqfs_inode_ipc_ext_t ipc = {
.nlink = htole32(n->data.ipc_ext.nlink),
.xattr_idx = htole32(n->data.ipc_ext.xattr_idx),
};
return sqfs_meta_writer_append(ir, &ipc, sizeof(ipc));
}
}
return SQFS_ERROR_UNSUPPORTED;
}
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