Exemple #1
0
static void domcreate_rebuild_done(libxl__egc *egc,
                                   libxl__domain_create_state *dcs,
                                   int ret)
{
    STATE_AO_GC(dcs->ao);

    /* convenience aliases */
    const uint32_t domid = dcs->guest_domid;
    libxl_domain_config *const d_config = dcs->guest_config;
    libxl_ctx *const ctx = CTX;

    if (ret) {
        LIBXL__LOG(ctx, LIBXL__LOG_ERROR, "cannot (re-)build domain: %d", ret);
        ret = ERROR_FAIL;
        goto error_out;
    }

    store_libxl_entry(gc, domid, &d_config->b_info);

    libxl__multidev_begin(ao, &dcs->multidev);
    dcs->multidev.callback = domcreate_launch_dm;
    libxl__add_disks(egc, ao, domid, d_config, &dcs->multidev);
    libxl__multidev_prepared(egc, &dcs->multidev, 0);

    return;

 error_out:
    assert(ret);
    domcreate_complete(egc, dcs, ret);
}
Exemple #2
0
void libxl__spawn_stub_dm(libxl__egc *egc, libxl__stub_dm_spawn_state *sdss)
{
    STATE_AO_GC(sdss->dm.spawn.ao);
    libxl_ctx *ctx = libxl__gc_owner(gc);
    int ret;
    libxl_device_vfb *vfb;
    libxl_device_vkb *vkb;
    char **args;
    struct xs_permissions perm[2];
    xs_transaction_t t;

    /* convenience aliases */
    libxl_domain_config *const dm_config = &sdss->dm_config;
    libxl_domain_config *const guest_config = sdss->dm.guest_config;
    const int guest_domid = sdss->dm.guest_domid;
    libxl__domain_build_state *const d_state = sdss->dm.build_state;
    libxl__domain_build_state *const stubdom_state = &sdss->dm_state;

    if (guest_config->b_info.device_model_version !=
        LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN_TRADITIONAL) {
        ret = ERROR_INVAL;
        goto out;
    }

    sdss->pvqemu.guest_domid = 0;

    libxl_domain_create_info_init(&dm_config->c_info);
    dm_config->c_info.type = LIBXL_DOMAIN_TYPE_PV;
    dm_config->c_info.name = libxl__stub_dm_name(gc,
                                    libxl__domid_to_name(gc, guest_domid));
    dm_config->c_info.ssidref = guest_config->b_info.device_model_ssidref;

    libxl_uuid_generate(&dm_config->c_info.uuid);

    libxl_domain_build_info_init(&dm_config->b_info);
    libxl_domain_build_info_init_type(&dm_config->b_info, LIBXL_DOMAIN_TYPE_PV);

    dm_config->b_info.max_vcpus = 1;
    dm_config->b_info.max_memkb = 32 * 1024;
    dm_config->b_info.target_memkb = dm_config->b_info.max_memkb;

    dm_config->b_info.u.pv.features = "";

    dm_config->b_info.device_model_version =
        guest_config->b_info.device_model_version;
    dm_config->b_info.device_model =
        guest_config->b_info.device_model;
    dm_config->b_info.extra = guest_config->b_info.extra;
    dm_config->b_info.extra_pv = guest_config->b_info.extra_pv;
    dm_config->b_info.extra_hvm = guest_config->b_info.extra_hvm;

    dm_config->disks = guest_config->disks;
    dm_config->num_disks = guest_config->num_disks;

    libxl__dm_vifs_from_hvm_guest_config(gc, guest_config, dm_config);

    dm_config->c_info.run_hotplug_scripts =
        guest_config->c_info.run_hotplug_scripts;

    ret = libxl__domain_create_info_setdefault(gc, &dm_config->c_info);
    if (ret) goto out;
    ret = libxl__domain_build_info_setdefault(gc, &dm_config->b_info);
    if (ret) goto out;

    GCNEW(vfb);
    GCNEW(vkb);
    libxl__vfb_and_vkb_from_hvm_guest_config(gc, guest_config, vfb, vkb);
    dm_config->vfbs = vfb;
    dm_config->num_vfbs = 1;
    dm_config->vkbs = vkb;
    dm_config->num_vkbs = 1;

    stubdom_state->pv_kernel.path
        = libxl__abs_path(gc, "ioemu-stubdom.gz", libxl__xenfirmwaredir_path());
    stubdom_state->pv_cmdline = libxl__sprintf(gc, " -d %d", guest_domid);
    stubdom_state->pv_ramdisk.path = "";

    /* fixme: this function can leak the stubdom if it fails */
    ret = libxl__domain_make(gc, &dm_config->c_info, &sdss->pvqemu.guest_domid);
    if (ret)
        goto out;
    uint32_t dm_domid = sdss->pvqemu.guest_domid;
    ret = libxl__domain_build(gc, dm_config, dm_domid, stubdom_state);
    if (ret)
        goto out;

    args = libxl__build_device_model_args(gc, "stubdom-dm", guest_domid,
                                          guest_config, d_state);
    if (!args) {
        ret = ERROR_FAIL;
        goto out;
    }

    libxl__write_stub_dmargs(gc, dm_domid, guest_domid, args);
    libxl__xs_write(gc, XBT_NULL,
                   libxl__sprintf(gc, "%s/image/device-model-domid",
                                  libxl__xs_get_dompath(gc, guest_domid)),
                   "%d", dm_domid);
    libxl__xs_write(gc, XBT_NULL,
                   libxl__sprintf(gc, "%s/target",
                                  libxl__xs_get_dompath(gc, dm_domid)),
                   "%d", guest_domid);
    ret = xc_domain_set_target(ctx->xch, dm_domid, guest_domid);
    if (ret<0) {
        LIBXL__LOG_ERRNO(ctx, LIBXL__LOG_ERROR,
                         "setting target domain %d -> %d",
                         dm_domid, guest_domid);
        ret = ERROR_FAIL;
        goto out;
    }
    xs_set_target(ctx->xsh, dm_domid, guest_domid);

    perm[0].id = dm_domid;
    perm[0].perms = XS_PERM_NONE;
    perm[1].id = guest_domid;
    perm[1].perms = XS_PERM_READ;
retry_transaction:
    t = xs_transaction_start(ctx->xsh);
    xs_mkdir(ctx->xsh, t,
        libxl__sprintf(gc, "/local/domain/0/device-model/%d", guest_domid));
    xs_set_permissions(ctx->xsh, t,
        libxl__sprintf(gc, "/local/domain/0/device-model/%d", guest_domid),
                       perm, ARRAY_SIZE(perm));
    if (!xs_transaction_end(ctx->xsh, t, 0))
        if (errno == EAGAIN)
            goto retry_transaction;

    libxl__multidev_begin(ao, &sdss->multidev);
    sdss->multidev.callback = spawn_stub_launch_dm;
    libxl__add_disks(egc, ao, dm_domid, dm_config, &sdss->multidev);
    libxl__multidev_prepared(egc, &sdss->multidev, 0);

    return;

out:
    assert(ret);
    spawn_stubdom_pvqemu_cb(egc, &sdss->pvqemu, ret);
}