예제 #1
0
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);
}
예제 #2
0
파일: crypto.c 프로젝트: Isaac-Lozano/qemu
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;
}