static int block_crypto_create_generic(QCryptoBlockFormat format,
const char *filename,
QemuOpts *opts,
Error **errp)
{
int ret = -EINVAL;
QCryptoBlockCreateOptions *create_opts = NULL;
QCryptoBlock *crypto = NULL;
struct BlockCryptoCreateData data = {
.size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
BDRV_SECTOR_SIZE),
.opts = opts,
.filename = filename,
};
create_opts = block_crypto_create_opts_init(format, opts, errp);
if (!create_opts) {
return -1;
}
crypto = qcrypto_block_create(create_opts,
block_crypto_init_func,
block_crypto_write_func,
&data,
errp);
if (!crypto) {
ret = -EIO;
goto cleanup;
}
ret = 0;
cleanup:
qcrypto_block_free(crypto);
blk_unref(data.blk);
qapi_free_QCryptoBlockCreateOptions(create_opts);
return ret;
}
static int block_crypto_truncate(BlockDriverState *bs, int64_t offset,
Error **errp)
{
BlockCrypto *crypto = bs->opaque;
size_t payload_offset =
qcrypto_block_get_payload_offset(crypto->block);
offset += payload_offset;
return bdrv_truncate(bs->file, offset, errp);
}
static QCryptoBlockCreateOptions *
block_crypto_create_opts_init(QCryptoBlockFormat format,
QemuOpts *opts,
Error **errp)
{
OptsVisitor *ov;
QCryptoBlockCreateOptions *ret = NULL;
Error *local_err = NULL;
ret = g_new0(QCryptoBlockCreateOptions, 1);
ret->format = format;
ov = opts_visitor_new(opts);
visit_start_struct(opts_get_visitor(ov),
NULL, NULL, 0, &local_err);
if (local_err) {
goto out;
}
switch (format) {
case Q_CRYPTO_BLOCK_FORMAT_LUKS:
visit_type_QCryptoBlockCreateOptionsLUKS_members(
opts_get_visitor(ov), &ret->u.luks, &local_err);
break;
default:
error_setg(&local_err, "Unsupported block format %d", format);
break;
}
if (!local_err) {
visit_check_struct(opts_get_visitor(ov), &local_err);
}
visit_end_struct(opts_get_visitor(ov));
out:
if (local_err) {
error_propagate(errp, local_err);
qapi_free_QCryptoBlockCreateOptions(ret);
ret = NULL;
}
opts_visitor_cleanup(ov);
return ret;
}
