tpm: Move backend code under the 'backends/' directory

TPM subsytem is split into backends (see commit f4ede81eed2)
and frontends (see i.e. 3676bc69b35). Keep the emulated
hardware 'frontends' under hw/tpm/, but move the backends
in the backends/tpm/ directory.

Suggested-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20200612085444.8362-13-philmd@redhat.com
Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>

1 files changed, 0 insertions, 997 deletions

diff --git a/hw/tpm/tpm_emulator.c b/hw/tpm/tpm_emulator.c
deleted file mode 100644
index 9605339f93..0000000000
--- a/hw/tpm/tpm_emulator.c
+++ /dev/null
@@ -1,997 +0,0 @@
-/*
- *  Emulator TPM driver
- *
- *  Copyright (c) 2017 Intel Corporation
- *  Author: Amarnath Valluri <amarnath.valluri@intel.com>
- *
- *  Copyright (c) 2010 - 2013, 2018 IBM Corporation
- *  Authors:
- *    Stefan Berger <stefanb@us.ibm.com>
- *
- *  Copyright (C) 2011 IAIK, Graz University of Technology
- *    Author: Andreas Niederl
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, see <http://www.gnu.org/licenses/>
- *
- */
-
-#include "qemu/osdep.h"
-#include "qemu/error-report.h"
-#include "qemu/module.h"
-#include "qemu/sockets.h"
-#include "io/channel-socket.h"
-#include "sysemu/tpm_backend.h"
-#include "sysemu/tpm_util.h"
-#include "tpm_int.h"
-#include "tpm_ioctl.h"
-#include "migration/blocker.h"
-#include "migration/vmstate.h"
-#include "qapi/error.h"
-#include "qapi/clone-visitor.h"
-#include "qapi/qapi-visit-tpm.h"
-#include "chardev/char-fe.h"
-#include "trace.h"
-
-#define TYPE_TPM_EMULATOR "tpm-emulator"
-#define TPM_EMULATOR(obj) \
-    OBJECT_CHECK(TPMEmulator, (obj), TYPE_TPM_EMULATOR)
-
-#define TPM_EMULATOR_IMPLEMENTS_ALL_CAPS(S, cap) (((S)->caps & (cap)) == (cap))
-
-/* data structures */
-
-/* blobs from the TPM; part of VM state when migrating */
-typedef struct TPMBlobBuffers {
-    uint32_t permanent_flags;
-    TPMSizedBuffer permanent;
-
-    uint32_t volatil_flags;
-    TPMSizedBuffer volatil;
-
-    uint32_t savestate_flags;
-    TPMSizedBuffer savestate;
-} TPMBlobBuffers;
-
-typedef struct TPMEmulator {
-    TPMBackend parent;
-
-    TPMEmulatorOptions *options;
-    CharBackend ctrl_chr;
-    QIOChannel *data_ioc;
-    TPMVersion tpm_version;
-    ptm_cap caps; /* capabilities of the TPM */
-    uint8_t cur_locty_number; /* last set locality */
-    Error *migration_blocker;
-
-    QemuMutex mutex;
-
-    unsigned int established_flag:1;
-    unsigned int established_flag_cached:1;
-
-    TPMBlobBuffers state_blobs;
-} TPMEmulator;
-
-struct tpm_error {
-    uint32_t tpm_result;
-    const char *string;
-};
-
-static const struct tpm_error tpm_errors[] = {
-    /* TPM 1.2 error codes */
-    { TPM_BAD_PARAMETER   , "a parameter is bad" },
-    { TPM_FAIL            , "operation failed" },
-    { TPM_KEYNOTFOUND     , "key could not be found" },
-    { TPM_BAD_PARAM_SIZE  , "bad parameter size"},
-    { TPM_ENCRYPT_ERROR   , "encryption error" },
-    { TPM_DECRYPT_ERROR   , "decryption error" },
-    { TPM_BAD_KEY_PROPERTY, "bad key property" },
-    { TPM_BAD_MODE        , "bad (encryption) mode" },
-    { TPM_BAD_VERSION     , "bad version identifier" },
-    { TPM_BAD_LOCALITY    , "bad locality" },
-    /* TPM 2 error codes */
-    { TPM_RC_FAILURE     , "operation failed" },
-    { TPM_RC_LOCALITY    , "bad locality"     },
-    { TPM_RC_INSUFFICIENT, "insufficient amount of data" },
-};
-
-static const char *tpm_emulator_strerror(uint32_t tpm_result)
-{
-    size_t i;
-
-    for (i = 0; i < ARRAY_SIZE(tpm_errors); i++) {
-        if (tpm_errors[i].tpm_result == tpm_result) {
-            return tpm_errors[i].string;
-        }
-    }
-    return "";
-}
-
-static int tpm_emulator_ctrlcmd(TPMEmulator *tpm, unsigned long cmd, void *msg,
-                                size_t msg_len_in, size_t msg_len_out)
-{
-    CharBackend *dev = &tpm->ctrl_chr;
-    uint32_t cmd_no = cpu_to_be32(cmd);
-    ssize_t n = sizeof(uint32_t) + msg_len_in;
-    uint8_t *buf = NULL;
-    int ret = -1;
-
-    qemu_mutex_lock(&tpm->mutex);
-
-    buf = g_alloca(n);
-    memcpy(buf, &cmd_no, sizeof(cmd_no));
-    memcpy(buf + sizeof(cmd_no), msg, msg_len_in);
-
-    n = qemu_chr_fe_write_all(dev, buf, n);
-    if (n <= 0) {
-        goto end;
-    }
-
-    if (msg_len_out != 0) {
-        n = qemu_chr_fe_read_all(dev, msg, msg_len_out);
-        if (n <= 0) {
-            goto end;
-        }
-    }
-
-    ret = 0;
-
-end:
-    qemu_mutex_unlock(&tpm->mutex);
-    return ret;
-}
-
-static int tpm_emulator_unix_tx_bufs(TPMEmulator *tpm_emu,
-                                     const uint8_t *in, uint32_t in_len,
-                                     uint8_t *out, uint32_t out_len,
-                                     bool *selftest_done,
-                                     Error **errp)
-{
-    ssize_t ret;
-    bool is_selftest = false;
-
-    if (selftest_done) {
-        *selftest_done = false;
-        is_selftest = tpm_util_is_selftest(in, in_len);
-    }
-
-    ret = qio_channel_write_all(tpm_emu->data_ioc, (char *)in, in_len, errp);
-    if (ret != 0) {
-        return -1;
-    }
-
-    ret = qio_channel_read_all(tpm_emu->data_ioc, (char *)out,
-              sizeof(struct tpm_resp_hdr), errp);
-    if (ret != 0) {
-        return -1;
-    }
-
-    ret = qio_channel_read_all(tpm_emu->data_ioc,
-              (char *)out + sizeof(struct tpm_resp_hdr),
-              tpm_cmd_get_size(out) - sizeof(struct tpm_resp_hdr), errp);
-    if (ret != 0) {
-        return -1;
-    }
-
-    if (is_selftest) {
-        *selftest_done = tpm_cmd_get_errcode(out) == 0;
-    }
-
-    return 0;
-}
-
-static int tpm_emulator_set_locality(TPMEmulator *tpm_emu, uint8_t locty_number,
-                                     Error **errp)
-{
-    ptm_loc loc;
-
-    if (tpm_emu->cur_locty_number == locty_number) {
-        return 0;
-    }
-
-    trace_tpm_emulator_set_locality(locty_number);
-
-    memset(&loc, 0, sizeof(loc));
-    loc.u.req.loc = locty_number;
-    if (tpm_emulator_ctrlcmd(tpm_emu, CMD_SET_LOCALITY, &loc,
-                             sizeof(loc), sizeof(loc)) < 0) {
-        error_setg(errp, "tpm-emulator: could not set locality : %s",
-                   strerror(errno));
-        return -1;
-    }
-
-    loc.u.resp.tpm_result = be32_to_cpu(loc.u.resp.tpm_result);
-    if (loc.u.resp.tpm_result != 0) {
-        error_setg(errp, "tpm-emulator: TPM result for set locality : 0x%x",
-                   loc.u.resp.tpm_result);
-        return -1;
-    }
-
-    tpm_emu->cur_locty_number = locty_number;
-
-    return 0;
-}
-
-static void tpm_emulator_handle_request(TPMBackend *tb, TPMBackendCmd *cmd,
-                                        Error **errp)
-{
-    TPMEmulator *tpm_emu = TPM_EMULATOR(tb);
-
-    trace_tpm_emulator_handle_request();
-
-    if (tpm_emulator_set_locality(tpm_emu, cmd->locty, errp) < 0 ||
-        tpm_emulator_unix_tx_bufs(tpm_emu, cmd->in, cmd->in_len,
-                                  cmd->out, cmd->out_len,
-                                  &cmd->selftest_done, errp) < 0) {
-        tpm_util_write_fatal_error_response(cmd->out, cmd->out_len);
-    }
-}
-
-static int tpm_emulator_probe_caps(TPMEmulator *tpm_emu)
-{
-    if (tpm_emulator_ctrlcmd(tpm_emu, CMD_GET_CAPABILITY,
-                             &tpm_emu->caps, 0, sizeof(tpm_emu->caps)) < 0) {
-        error_report("tpm-emulator: probing failed : %s", strerror(errno));
-        return -1;
-    }
-
-    tpm_emu->caps = be64_to_cpu(tpm_emu->caps);
-
-    trace_tpm_emulator_probe_caps(tpm_emu->caps);
-
-    return 0;
-}
-
-static int tpm_emulator_check_caps(TPMEmulator *tpm_emu)
-{
-    ptm_cap caps = 0;
-    const char *tpm = NULL;
-
-    /* check for min. required capabilities */
-    switch (tpm_emu->tpm_version) {
-    case TPM_VERSION_1_2:
-        caps = PTM_CAP_INIT | PTM_CAP_SHUTDOWN | PTM_CAP_GET_TPMESTABLISHED |
-               PTM_CAP_SET_LOCALITY | PTM_CAP_SET_DATAFD | PTM_CAP_STOP |
-               PTM_CAP_SET_BUFFERSIZE;
-        tpm = "1.2";
-        break;
-    case TPM_VERSION_2_0:
-        caps = PTM_CAP_INIT | PTM_CAP_SHUTDOWN | PTM_CAP_GET_TPMESTABLISHED |
-               PTM_CAP_SET_LOCALITY | PTM_CAP_RESET_TPMESTABLISHED |
-               PTM_CAP_SET_DATAFD | PTM_CAP_STOP | PTM_CAP_SET_BUFFERSIZE;
-        tpm = "2";
-        break;
-    case TPM_VERSION_UNSPEC:
-        error_report("tpm-emulator: TPM version has not been set");
-        return -1;
-    }
-
-    if (!TPM_EMULATOR_IMPLEMENTS_ALL_CAPS(tpm_emu, caps)) {
-        error_report("tpm-emulator: TPM does not implement minimum set of "
-                     "required capabilities for TPM %s (0x%x)", tpm, (int)caps);
-        return -1;
-    }
-
-    return 0;
-}
-
-static int tpm_emulator_stop_tpm(TPMBackend *tb)
-{
-    TPMEmulator *tpm_emu = TPM_EMULATOR(tb);
-    ptm_res res;
-
-    if (tpm_emulator_ctrlcmd(tpm_emu, CMD_STOP, &res, 0, sizeof(res)) < 0) {
-        error_report("tpm-emulator: Could not stop TPM: %s",
-                     strerror(errno));
-        return -1;
-    }
-
-    res = be32_to_cpu(res);
-    if (res) {
-        error_report("tpm-emulator: TPM result for CMD_STOP: 0x%x %s", res,
-                     tpm_emulator_strerror(res));
-        return -1;
-    }
-
-    return 0;
-}
-
-static int tpm_emulator_set_buffer_size(TPMBackend *tb,
-                                        size_t wanted_size,
-                                        size_t *actual_size)
-{
-    TPMEmulator *tpm_emu = TPM_EMULATOR(tb);
-    ptm_setbuffersize psbs;
-
-    if (tpm_emulator_stop_tpm(tb) < 0) {
-        return -1;
-    }
-
-    psbs.u.req.buffersize = cpu_to_be32(wanted_size);
-
-    if (tpm_emulator_ctrlcmd(tpm_emu, CMD_SET_BUFFERSIZE, &psbs,
-                             sizeof(psbs.u.req), sizeof(psbs.u.resp)) < 0) {
-        error_report("tpm-emulator: Could not set buffer size: %s",
-                     strerror(errno));
-        return -1;
-    }
-
-    psbs.u.resp.tpm_result = be32_to_cpu(psbs.u.resp.tpm_result);
-    if (psbs.u.resp.tpm_result != 0) {
-        error_report("tpm-emulator: TPM result for set buffer size : 0x%x %s",
-                     psbs.u.resp.tpm_result,
-                     tpm_emulator_strerror(psbs.u.resp.tpm_result));
-        return -1;
-    }
-
-    if (actual_size) {
-        *actual_size = be32_to_cpu(psbs.u.resp.buffersize);
-    }
-
-    trace_tpm_emulator_set_buffer_size(
-            be32_to_cpu(psbs.u.resp.buffersize),
-            be32_to_cpu(psbs.u.resp.minsize),
-            be32_to_cpu(psbs.u.resp.maxsize));
-
-    return 0;
-}
-
-static int tpm_emulator_startup_tpm_resume(TPMBackend *tb, size_t buffersize,
-                                     bool is_resume)
-{
-    TPMEmulator *tpm_emu = TPM_EMULATOR(tb);
-    ptm_init init = {
-        .u.req.init_flags = 0,
-    };
-    ptm_res res;
-
-    trace_tpm_emulator_startup_tpm_resume(is_resume, buffersize);
-
-    if (buffersize != 0 &&
-        tpm_emulator_set_buffer_size(tb, buffersize, NULL) < 0) {
-        goto err_exit;
-    }
-
-    if (is_resume) {
-        init.u.req.init_flags |= cpu_to_be32(PTM_INIT_FLAG_DELETE_VOLATILE);
-    }
-
-    if (tpm_emulator_ctrlcmd(tpm_emu, CMD_INIT, &init, sizeof(init),
-                             sizeof(init)) < 0) {
-        error_report("tpm-emulator: could not send INIT: %s",
-                     strerror(errno));
-        goto err_exit;
-    }
-
-    res = be32_to_cpu(init.u.resp.tpm_result);
-    if (res) {
-        error_report("tpm-emulator: TPM result for CMD_INIT: 0x%x %s", res,
-                     tpm_emulator_strerror(res));
-        goto err_exit;
-    }
-    return 0;
-
-err_exit:
-    return -1;
-}
-
-static int tpm_emulator_startup_tpm(TPMBackend *tb, size_t buffersize)
-{
-    return tpm_emulator_startup_tpm_resume(tb, buffersize, false);
-}
-
-static bool tpm_emulator_get_tpm_established_flag(TPMBackend *tb)
-{
-    TPMEmulator *tpm_emu = TPM_EMULATOR(tb);
-    ptm_est est;
-
-    if (tpm_emu->established_flag_cached) {
-        return tpm_emu->established_flag;
-    }
-
-    if (tpm_emulator_ctrlcmd(tpm_emu, CMD_GET_TPMESTABLISHED, &est,
-                             0, sizeof(est)) < 0) {
-        error_report("tpm-emulator: Could not get the TPM established flag: %s",
-                     strerror(errno));
-        return false;
-    }
-    trace_tpm_emulator_get_tpm_established_flag(est.u.resp.bit);
-
-    tpm_emu->established_flag_cached = 1;
-    tpm_emu->established_flag = (est.u.resp.bit != 0);
-
-    return tpm_emu->established_flag;
-}
-
-static int tpm_emulator_reset_tpm_established_flag(TPMBackend *tb,
-                                                   uint8_t locty)
-{
-    TPMEmulator *tpm_emu = TPM_EMULATOR(tb);
-    ptm_reset_est reset_est;
-    ptm_res res;
-
-    /* only a TPM 2.0 will support this */
-    if (tpm_emu->tpm_version != TPM_VERSION_2_0) {
-        return 0;
-    }
-
-    reset_est.u.req.loc = tpm_emu->cur_locty_number;
-    if (tpm_emulator_ctrlcmd(tpm_emu, CMD_RESET_TPMESTABLISHED,
-                             &reset_est, sizeof(reset_est),
-                             sizeof(reset_est)) < 0) {
-        error_report("tpm-emulator: Could not reset the establishment bit: %s",
-                     strerror(errno));
-        return -1;
-    }
-
-    res = be32_to_cpu(reset_est.u.resp.tpm_result);
-    if (res) {
-        error_report(
-            "tpm-emulator: TPM result for rest established flag: 0x%x %s",
-            res, tpm_emulator_strerror(res));
-        return -1;
-    }
-
-    tpm_emu->established_flag_cached = 0;
-
-    return 0;
-}
-
-static void tpm_emulator_cancel_cmd(TPMBackend *tb)
-{
-    TPMEmulator *tpm_emu = TPM_EMULATOR(tb);
-    ptm_res res;
-
-    if (!TPM_EMULATOR_IMPLEMENTS_ALL_CAPS(tpm_emu, PTM_CAP_CANCEL_TPM_CMD)) {
-        trace_tpm_emulator_cancel_cmd_not_supt();
-        return;
-    }
-
-    /* FIXME: make the function non-blocking, or it may block a VCPU */
-    if (tpm_emulator_ctrlcmd(tpm_emu, CMD_CANCEL_TPM_CMD, &res, 0,
-                             sizeof(res)) < 0) {
-        error_report("tpm-emulator: Could not cancel command: %s",
-                     strerror(errno));
-    } else if (res != 0) {
-        error_report("tpm-emulator: Failed to cancel TPM: 0x%x",
-                     be32_to_cpu(res));
-    }
-}
-
-static TPMVersion tpm_emulator_get_tpm_version(TPMBackend *tb)
-{
-    TPMEmulator *tpm_emu = TPM_EMULATOR(tb);
-
-    return tpm_emu->tpm_version;
-}
-
-static size_t tpm_emulator_get_buffer_size(TPMBackend *tb)
-{
-    size_t actual_size;
-
-    if (tpm_emulator_set_buffer_size(tb, 0, &actual_size) < 0) {
-        return 4096;
-    }
-
-    return actual_size;
-}
-
-static int tpm_emulator_block_migration(TPMEmulator *tpm_emu)
-{
-    Error *err = NULL;
-    ptm_cap caps = PTM_CAP_GET_STATEBLOB | PTM_CAP_SET_STATEBLOB |
-                   PTM_CAP_STOP;
-
-    if (!TPM_EMULATOR_IMPLEMENTS_ALL_CAPS(tpm_emu, caps)) {
-        error_setg(&tpm_emu->migration_blocker,
-                   "Migration disabled: TPM emulator does not support "
-                   "migration");
-        migrate_add_blocker(tpm_emu->migration_blocker, &err);
-        if (err) {
-            error_report_err(err);
-            error_free(tpm_emu->migration_blocker);
-            tpm_emu->migration_blocker = NULL;
-
-            return -1;
-        }
-    }
-
-    return 0;
-}
-
-static int tpm_emulator_prepare_data_fd(TPMEmulator *tpm_emu)
-{
-    ptm_res res;
-    Error *err = NULL;
-    int fds[2] = { -1, -1 };
-
-    if (socketpair(AF_UNIX, SOCK_STREAM, 0, fds) < 0) {
-        error_report("tpm-emulator: Failed to create socketpair");
-        return -1;
-    }
-
-    qemu_chr_fe_set_msgfds(&tpm_emu->ctrl_chr, fds + 1, 1);
-
-    if (tpm_emulator_ctrlcmd(tpm_emu, CMD_SET_DATAFD, &res, 0,
-                             sizeof(res)) < 0 || res != 0) {
-        error_report("tpm-emulator: Failed to send CMD_SET_DATAFD: %s",
-                     strerror(errno));
-        goto err_exit;
-    }
-
-    tpm_emu->data_ioc = QIO_CHANNEL(qio_channel_socket_new_fd(fds[0], &err));
-    if (err) {
-        error_prepend(&err, "tpm-emulator: Failed to create io channel: ");
-        error_report_err(err);
-        goto err_exit;
-    }
-
-    closesocket(fds[1]);
-
-    return 0;
-
-err_exit:
-    closesocket(fds[0]);
-    closesocket(fds[1]);
-    return -1;
-}
-
-static int tpm_emulator_handle_device_opts(TPMEmulator *tpm_emu, QemuOpts *opts)
-{
-    const char *value;
-
-    value = qemu_opt_get(opts, "chardev");
-    if (value) {
-        Error *err = NULL;
-        Chardev *dev = qemu_chr_find(value);
-
-        if (!dev) {
-            error_report("tpm-emulator: tpm chardev '%s' not found.", value);
-            goto err;
-        }
-
-        if (!qemu_chr_fe_init(&tpm_emu->ctrl_chr, dev, &err)) {
-            error_prepend(&err, "tpm-emulator: No valid chardev found at '%s':",
-                          value);
-            error_report_err(err);
-            goto err;
-        }
-
-        tpm_emu->options->chardev = g_strdup(value);
-    }
-
-    if (tpm_emulator_prepare_data_fd(tpm_emu) < 0) {
-        goto err;
-    }
-
-    /* FIXME: tpm_util_test_tpmdev() accepts only on socket fd, as it also used
-     * by passthrough driver, which not yet using GIOChannel.
-     */
-    if (tpm_util_test_tpmdev(QIO_CHANNEL_SOCKET(tpm_emu->data_ioc)->fd,
-                             &tpm_emu->tpm_version)) {
-        error_report("'%s' is not emulating TPM device. Error: %s",
-                      tpm_emu->options->chardev, strerror(errno));
-        goto err;
-    }
-
-    switch (tpm_emu->tpm_version) {
-    case TPM_VERSION_1_2:
-        trace_tpm_emulator_handle_device_opts_tpm12();
-        break;
-    case TPM_VERSION_2_0:
-        trace_tpm_emulator_handle_device_opts_tpm2();
-        break;
-    default:
-        trace_tpm_emulator_handle_device_opts_unspec();
-    }
-
-    if (tpm_emulator_probe_caps(tpm_emu) ||
-        tpm_emulator_check_caps(tpm_emu)) {
-        goto err;
-    }
-
-    return tpm_emulator_block_migration(tpm_emu);
-
-err:
-    trace_tpm_emulator_handle_device_opts_startup_error();
-
-    return -1;
-}
-
-static TPMBackend *tpm_emulator_create(QemuOpts *opts)
-{
-    TPMBackend *tb = TPM_BACKEND(object_new(TYPE_TPM_EMULATOR));
-
-    if (tpm_emulator_handle_device_opts(TPM_EMULATOR(tb), opts)) {
-        object_unref(OBJECT(tb));
-        return NULL;
-    }
-
-    return tb;
-}
-
-static TpmTypeOptions *tpm_emulator_get_tpm_options(TPMBackend *tb)
-{
-    TPMEmulator *tpm_emu = TPM_EMULATOR(tb);
-    TpmTypeOptions *options = g_new0(TpmTypeOptions, 1);
-
-    options->type = TPM_TYPE_OPTIONS_KIND_EMULATOR;
-    options->u.emulator.data = QAPI_CLONE(TPMEmulatorOptions, tpm_emu->options);
-
-    return options;
-}
-
-static const QemuOptDesc tpm_emulator_cmdline_opts[] = {
-    TPM_STANDARD_CMDLINE_OPTS,
-    {
-        .name = "chardev",
-        .type = QEMU_OPT_STRING,
-        .help = "Character device to use for out-of-band control messages",
-    },
-    { /* end of list */ },
-};
-
-/*
- * Transfer a TPM state blob from the TPM into a provided buffer.
- *
- * @tpm_emu: TPMEmulator
- * @type: the type of blob to transfer
- * @tsb: the TPMSizeBuffer to fill with the blob
- * @flags: the flags to return to the caller
- */
-static int tpm_emulator_get_state_blob(TPMEmulator *tpm_emu,
-                                       uint8_t type,
-                                       TPMSizedBuffer *tsb,
-                                       uint32_t *flags)
-{
-    ptm_getstate pgs;
-    ptm_res res;
-    ssize_t n;
-    uint32_t totlength, length;
-
-    tpm_sized_buffer_reset(tsb);
-
-    pgs.u.req.state_flags = cpu_to_be32(PTM_STATE_FLAG_DECRYPTED);
-    pgs.u.req.type = cpu_to_be32(type);
-    pgs.u.req.offset = 0;
-
-    if (tpm_emulator_ctrlcmd(tpm_emu, CMD_GET_STATEBLOB,
-                             &pgs, sizeof(pgs.u.req),
-                             offsetof(ptm_getstate, u.resp.data)) < 0) {
-        error_report("tpm-emulator: could not get state blob type %d : %s",
-                     type, strerror(errno));
-        return -1;
-    }
-
-    res = be32_to_cpu(pgs.u.resp.tpm_result);
-    if (res != 0 && (res & 0x800) == 0) {
-        error_report("tpm-emulator: Getting the stateblob (type %d) failed "
-                     "with a TPM error 0x%x %s", type, res,
-                     tpm_emulator_strerror(res));
-        return -1;
-    }
-
-    totlength = be32_to_cpu(pgs.u.resp.totlength);
-    length = be32_to_cpu(pgs.u.resp.length);
-    if (totlength != length) {
-        error_report("tpm-emulator: Expecting to read %u bytes "
-                     "but would get %u", totlength, length);
-        return -1;
-    }
-
-    *flags = be32_to_cpu(pgs.u.resp.state_flags);
-
-    if (totlength > 0) {
-        tsb->buffer = g_try_malloc(totlength);
-        if (!tsb->buffer) {
-            error_report("tpm-emulator: Out of memory allocating %u bytes",
-                         totlength);
-            return -1;
-        }
-
-        n = qemu_chr_fe_read_all(&tpm_emu->ctrl_chr, tsb->buffer, totlength);
-        if (n != totlength) {
-            error_report("tpm-emulator: Could not read stateblob (type %d); "
-                         "expected %u bytes, got %zd",
-                         type, totlength, n);
-            return -1;
-        }
-    }
-    tsb->size = totlength;
-
-    trace_tpm_emulator_get_state_blob(type, tsb->size, *flags);
-
-    return 0;
-}
-
-static int tpm_emulator_get_state_blobs(TPMEmulator *tpm_emu)
-{
-    TPMBlobBuffers *state_blobs = &tpm_emu->state_blobs;
-
-    if (tpm_emulator_get_state_blob(tpm_emu, PTM_BLOB_TYPE_PERMANENT,
-                                    &state_blobs->permanent,
-                                    &state_blobs->permanent_flags) < 0 ||
-        tpm_emulator_get_state_blob(tpm_emu, PTM_BLOB_TYPE_VOLATILE,
-                                    &state_blobs->volatil,
-                                    &state_blobs->volatil_flags) < 0 ||
-        tpm_emulator_get_state_blob(tpm_emu, PTM_BLOB_TYPE_SAVESTATE,
-                                    &state_blobs->savestate,
-                                    &state_blobs->savestate_flags) < 0) {
-        goto err_exit;
-    }
-
-    return 0;
-
- err_exit:
-    tpm_sized_buffer_reset(&state_blobs->volatil);
-    tpm_sized_buffer_reset(&state_blobs->permanent);
-    tpm_sized_buffer_reset(&state_blobs->savestate);
-
-    return -1;
-}
-
-/*
- * Transfer a TPM state blob to the TPM emulator.
- *
- * @tpm_emu: TPMEmulator
- * @type: the type of TPM state blob to transfer
- * @tsb: TPMSizedBuffer containing the TPM state blob
- * @flags: Flags describing the (encryption) state of the TPM state blob
- */
-static int tpm_emulator_set_state_blob(TPMEmulator *tpm_emu,
-                                       uint32_t type,
-                                       TPMSizedBuffer *tsb,
-                                       uint32_t flags)
-{
-    ssize_t n;
-    ptm_setstate pss;
-    ptm_res tpm_result;
-
-    if (tsb->size == 0) {
-        return 0;
-    }
-
-    pss = (ptm_setstate) {
-        .u.req.state_flags = cpu_to_be32(flags),
-        .u.req.type = cpu_to_be32(type),
-        .u.req.length = cpu_to_be32(tsb->size),
-    };
-
-    /* write the header only */
-    if (tpm_emulator_ctrlcmd(tpm_emu, CMD_SET_STATEBLOB, &pss,
-                             offsetof(ptm_setstate, u.req.data), 0) < 0) {
-        error_report("tpm-emulator: could not set state blob type %d : %s",
-                     type, strerror(errno));
-        return -1;
-    }
-
-    /* now the body */
-    n = qemu_chr_fe_write_all(&tpm_emu->ctrl_chr, tsb->buffer, tsb->size);
-    if (n != tsb->size) {
-        error_report("tpm-emulator: Writing the stateblob (type %d) "
-                     "failed; could not write %u bytes, but only %zd",
-                     type, tsb->size, n);
-        return -1;
-    }
-
-    /* now get the result */
-    n = qemu_chr_fe_read_all(&tpm_emu->ctrl_chr,
-                             (uint8_t *)&pss, sizeof(pss.u.resp));
-    if (n != sizeof(pss.u.resp)) {
-        error_report("tpm-emulator: Reading response from writing stateblob "
-                     "(type %d) failed; expected %zu bytes, got %zd", type,
-                     sizeof(pss.u.resp), n);
-        return -1;
-    }
-
-    tpm_result = be32_to_cpu(pss.u.resp.tpm_result);
-    if (tpm_result != 0) {
-        error_report("tpm-emulator: Setting the stateblob (type %d) failed "
-                     "with a TPM error 0x%x %s", type, tpm_result,
-                     tpm_emulator_strerror(tpm_result));
-        return -1;
-    }
-
-    trace_tpm_emulator_set_state_blob(type, tsb->size, flags);
-
-    return 0;
-}
-
-/*
- * Set all the TPM state blobs.
- *
- * Returns a negative errno code in case of error.
- */
-static int tpm_emulator_set_state_blobs(TPMBackend *tb)
-{
-    TPMEmulator *tpm_emu = TPM_EMULATOR(tb);
-    TPMBlobBuffers *state_blobs = &tpm_emu->state_blobs;
-
-    trace_tpm_emulator_set_state_blobs();
-
-    if (tpm_emulator_stop_tpm(tb) < 0) {
-        trace_tpm_emulator_set_state_blobs_error("Could not stop TPM");
-        return -EIO;
-    }
-
-    if (tpm_emulator_set_state_blob(tpm_emu, PTM_BLOB_TYPE_PERMANENT,
-                                    &state_blobs->permanent,
-                                    state_blobs->permanent_flags) < 0 ||
-        tpm_emulator_set_state_blob(tpm_emu, PTM_BLOB_TYPE_VOLATILE,
-                                    &state_blobs->volatil,
-                                    state_blobs->volatil_flags) < 0 ||
-        tpm_emulator_set_state_blob(tpm_emu, PTM_BLOB_TYPE_SAVESTATE,
-                                    &state_blobs->savestate,
-                                    state_blobs->savestate_flags) < 0) {
-        return -EIO;
-    }
-
-    trace_tpm_emulator_set_state_blobs_done();
-
-    return 0;
-}
-
-static int tpm_emulator_pre_save(void *opaque)
-{
-    TPMBackend *tb = opaque;
-    TPMEmulator *tpm_emu = TPM_EMULATOR(tb);
-
-    trace_tpm_emulator_pre_save();
-
-    tpm_backend_finish_sync(tb);
-
-    /* get the state blobs from the TPM */
-    return tpm_emulator_get_state_blobs(tpm_emu);
-}
-
-/*
- * Load the TPM state blobs into the TPM.
- *
- * Returns negative errno codes in case of error.
- */
-static int tpm_emulator_post_load(void *opaque, int version_id)
-{
-    TPMBackend *tb = opaque;
-    int ret;
-
-    ret = tpm_emulator_set_state_blobs(tb);
-    if (ret < 0) {
-        return ret;
-    }
-
-    if (tpm_emulator_startup_tpm_resume(tb, 0, true) < 0) {
-        return -EIO;
-    }
-
-    return 0;
-}
-
-static const VMStateDescription vmstate_tpm_emulator = {
-    .name = "tpm-emulator",
-    .version_id = 0,
-    .pre_save = tpm_emulator_pre_save,
-    .post_load = tpm_emulator_post_load,
-    .fields = (VMStateField[]) {
-        VMSTATE_UINT32(state_blobs.permanent_flags, TPMEmulator),
-        VMSTATE_UINT32(state_blobs.permanent.size, TPMEmulator),
-        VMSTATE_VBUFFER_ALLOC_UINT32(state_blobs.permanent.buffer,
-                                     TPMEmulator, 0, 0,
-                                     state_blobs.permanent.size),
-
-        VMSTATE_UINT32(state_blobs.volatil_flags, TPMEmulator),
-        VMSTATE_UINT32(state_blobs.volatil.size, TPMEmulator),
-        VMSTATE_VBUFFER_ALLOC_UINT32(state_blobs.volatil.buffer,
-                                     TPMEmulator, 0, 0,
-                                     state_blobs.volatil.size),
-
-        VMSTATE_UINT32(state_blobs.savestate_flags, TPMEmulator),
-        VMSTATE_UINT32(state_blobs.savestate.size, TPMEmulator),
-        VMSTATE_VBUFFER_ALLOC_UINT32(state_blobs.savestate.buffer,
-                                     TPMEmulator, 0, 0,
-                                     state_blobs.savestate.size),
-
-        VMSTATE_END_OF_LIST()
-    }
-};
-
-static void tpm_emulator_inst_init(Object *obj)
-{
-    TPMEmulator *tpm_emu = TPM_EMULATOR(obj);
-
-    trace_tpm_emulator_inst_init();
-
-    tpm_emu->options = g_new0(TPMEmulatorOptions, 1);
-    tpm_emu->cur_locty_number = ~0;
-    qemu_mutex_init(&tpm_emu->mutex);
-
-    vmstate_register(NULL, VMSTATE_INSTANCE_ID_ANY,
-                     &vmstate_tpm_emulator, obj);
-}
-
-/*
- * Gracefully shut down the external TPM
- */
-static void tpm_emulator_shutdown(TPMEmulator *tpm_emu)
-{
-    ptm_res res;
-
-    if (tpm_emulator_ctrlcmd(tpm_emu, CMD_SHUTDOWN, &res, 0, sizeof(res)) < 0) {
-        error_report("tpm-emulator: Could not cleanly shutdown the TPM: %s",
-                     strerror(errno));
-    } else if (res != 0) {
-        error_report("tpm-emulator: TPM result for shutdown: 0x%x %s",
-                     be32_to_cpu(res), tpm_emulator_strerror(be32_to_cpu(res)));
-    }
-}
-
-static void tpm_emulator_inst_finalize(Object *obj)
-{
-    TPMEmulator *tpm_emu = TPM_EMULATOR(obj);
-    TPMBlobBuffers *state_blobs = &tpm_emu->state_blobs;
-
-    tpm_emulator_shutdown(tpm_emu);
-
-    object_unref(OBJECT(tpm_emu->data_ioc));
-
-    qemu_chr_fe_deinit(&tpm_emu->ctrl_chr, false);
-
-    qapi_free_TPMEmulatorOptions(tpm_emu->options);
-
-    if (tpm_emu->migration_blocker) {
-        migrate_del_blocker(tpm_emu->migration_blocker);
-        error_free(tpm_emu->migration_blocker);
-    }
-
-    tpm_sized_buffer_reset(&state_blobs->volatil);
-    tpm_sized_buffer_reset(&state_blobs->permanent);
-    tpm_sized_buffer_reset(&state_blobs->savestate);
-
-    qemu_mutex_destroy(&tpm_emu->mutex);
-
-    vmstate_unregister(NULL, &vmstate_tpm_emulator, obj);
-}
-
-static void tpm_emulator_class_init(ObjectClass *klass, void *data)
-{
-    TPMBackendClass *tbc = TPM_BACKEND_CLASS(klass);
-
-    tbc->type = TPM_TYPE_EMULATOR;
-    tbc->opts = tpm_emulator_cmdline_opts;
-    tbc->desc = "TPM emulator backend driver";
-    tbc->create = tpm_emulator_create;
-    tbc->startup_tpm = tpm_emulator_startup_tpm;
-    tbc->cancel_cmd = tpm_emulator_cancel_cmd;
-    tbc->get_tpm_established_flag = tpm_emulator_get_tpm_established_flag;
-    tbc->reset_tpm_established_flag = tpm_emulator_reset_tpm_established_flag;
-    tbc->get_tpm_version = tpm_emulator_get_tpm_version;
-    tbc->get_buffer_size = tpm_emulator_get_buffer_size;
-    tbc->get_tpm_options = tpm_emulator_get_tpm_options;
-
-    tbc->handle_request = tpm_emulator_handle_request;
-}
-
-static const TypeInfo tpm_emulator_info = {
-    .name = TYPE_TPM_EMULATOR,
-    .parent = TYPE_TPM_BACKEND,
-    .instance_size = sizeof(TPMEmulator),
-    .class_init = tpm_emulator_class_init,
-    .instance_init = tpm_emulator_inst_init,
-    .instance_finalize = tpm_emulator_inst_finalize,
-};
-
-static void tpm_emulator_register(void)
-{
-    type_register_static(&tpm_emulator_info);
-}
-
-type_init(tpm_emulator_register)