C++ qemu_opts_del函数代码示例

static int qemu_archipelago_open(BlockDriverState *bs,
                                 QDict *options,
                                 int bdrv_flags,
                                 Error **errp)
{
    int ret = 0;
    const char *volume, *segment_name;
    QemuOpts *opts;
    Error *local_err = NULL;
    BDRVArchipelagoState *s = bs->opaque;

    opts = qemu_opts_create(&archipelago_runtime_opts, NULL, 0, &error_abort);
    qemu_opts_absorb_qdict(opts, options, &local_err);
    if (local_err) {
        error_propagate(errp, local_err);
        ret = -EINVAL;
        goto err_exit;
    }

    s->mportno = qemu_opt_get_number(opts, ARCHIPELAGO_OPT_MPORT,
                                     ARCHIPELAGO_DFL_MPORT);
    s->vportno = qemu_opt_get_number(opts, ARCHIPELAGO_OPT_VPORT,
                                     ARCHIPELAGO_DFL_VPORT);

    segment_name = qemu_opt_get(opts, ARCHIPELAGO_OPT_SEGMENT);
    if (segment_name == NULL) {
        s->segment_name = g_strdup("archipelago");
    } else {
        s->segment_name = g_strdup(segment_name);
    }

    volume = qemu_opt_get(opts, ARCHIPELAGO_OPT_VOLUME);
    if (volume == NULL) {
        error_setg(errp, "archipelago block driver requires the 'volume'"
                   " option");
        ret = -EINVAL;
        goto err_exit;
    }
    s->volname = g_strdup(volume);

    /* Initialize XSEG, join shared memory segment */
    ret = qemu_archipelago_init(s);
    if (ret < 0) {
        error_setg(errp, "cannot initialize XSEG and join shared "
                   "memory segment");
        goto err_exit;
    }

    qemu_opts_del(opts);
    return 0;

err_exit:
    g_free(s->volname);
    g_free(s->segment_name);
    qemu_opts_del(opts);
    return ret;
}

static void char_ringbuf_test(void)
{
    QemuOpts *opts;
    Chardev *chr;
    CharBackend be;
    char *data;
    int ret;

    opts = qemu_opts_create(qemu_find_opts("chardev"), "ringbuf-label",
                            1, &error_abort);
    qemu_opt_set(opts, "backend", "ringbuf", &error_abort);

    qemu_opt_set(opts, "size", "5", &error_abort);
    chr = qemu_chr_new_from_opts(opts, NULL);
    g_assert_null(chr);
    qemu_opts_del(opts);

    opts = qemu_opts_create(qemu_find_opts("chardev"), "ringbuf-label",
                            1, &error_abort);
    qemu_opt_set(opts, "backend", "ringbuf", &error_abort);
    qemu_opt_set(opts, "size", "2", &error_abort);
    chr = qemu_chr_new_from_opts(opts, &error_abort);
    g_assert_nonnull(chr);
    qemu_opts_del(opts);

    qemu_chr_fe_init(&be, chr, &error_abort);
    ret = qemu_chr_fe_write(&be, (void *)"buff", 4);
    g_assert_cmpint(ret, ==, 4);

    data = qmp_ringbuf_read("ringbuf-label", 4, false, 0, &error_abort);
    g_assert_cmpstr(data, ==, "ff");
    g_free(data);

    data = qmp_ringbuf_read("ringbuf-label", 4, false, 0, &error_abort);
    g_assert_cmpstr(data, ==, "");
    g_free(data);

    qemu_chr_fe_deinit(&be, true);

    /* check alias */
    opts = qemu_opts_create(qemu_find_opts("chardev"), "memory-label",
                            1, &error_abort);
    qemu_opt_set(opts, "backend", "memory", &error_abort);
    qemu_opt_set(opts, "size", "2", &error_abort);
    chr = qemu_chr_new_from_opts(opts, NULL);
    g_assert_nonnull(chr);
    object_unparent(OBJECT(chr));
    qemu_opts_del(opts);
}

int inet_listen(const char *str, char *ostr, int olen,
                int socktype, int port_offset, Error **errp)
{
    QemuOpts *opts;
    char *optstr;
    int sock = -1;
    InetSocketAddress *addr;

    addr = inet_parse(str, errp);
    if (addr != NULL) {
        opts = qemu_opts_create(&socket_optslist, NULL, 0, &error_abort);
        inet_addr_to_opts(opts, addr);
        qapi_free_InetSocketAddress(addr);
        sock = inet_listen_opts(opts, port_offset, errp);
        if (sock != -1 && ostr) {
            optstr = strchr(str, ',');
            if (qemu_opt_get_bool(opts, "ipv6", 0)) {
                snprintf(ostr, olen, "[%s]:%s%s",
                         qemu_opt_get(opts, "host"),
                         qemu_opt_get(opts, "port"),
                         optstr ? optstr : "");
            } else {
                snprintf(ostr, olen, "%s:%s%s",
                         qemu_opt_get(opts, "host"),
                         qemu_opt_get(opts, "port"),
                         optstr ? optstr : "");
            }
        }
        qemu_opts_del(opts);
    }
    return sock;
}

void user_creatable_del(const char *id, Error **errp)
{
    Object *container;
    Object *obj;

    container = object_get_objects_root();
    obj = object_resolve_path_component(container, id);
    if (!obj) {
        error_setg(errp, "object '%s' not found", id);
        return;
    }

    if (!user_creatable_can_be_deleted(USER_CREATABLE(obj))) {
        error_setg(errp, "object '%s' is in use, can not be deleted", id);
        return;
    }

    /*
     * if object was defined on the command-line, remove its corresponding
     * option group entry
     */
    qemu_opts_del(qemu_opts_find(qemu_find_opts_err("object", &error_abort),
                                 id));

    object_unparent(obj);
}

static void pc_fw_add_pflash_drv(void)
{
    QemuOpts *opts;
    QEMUMachine *machine;
    char *filename;

    if (bios_name == NULL) {
        bios_name = BIOS_FILENAME;
    }
    filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
    if (!filename) {
        error_report("Can't open BIOS image %s", bios_name);
        exit(1);
    }

    opts = drive_add(IF_PFLASH, -1, filename, "readonly=on");

    g_free(filename);

    if (opts == NULL) {
      return;
    }

    machine = find_default_machine();
    if (machine == NULL) {
      return;
    }

    if (!drive_init(opts, machine->block_default_type)) {
        qemu_opts_del(opts);
    }
}

static void test_qemu_opts_create(void)
{
    QemuOptsList *list;
    QemuOpts *opts;

    list = qemu_find_opts("opts_list_01");
    g_assert(list != NULL);
    g_assert(QTAILQ_EMPTY(&list->head));
    g_assert_cmpstr(list->name, ==, "opts_list_01");

    /* should not find anything at this point */
    opts = qemu_opts_find(list, NULL);
    g_assert(opts == NULL);

    /* create the opts */
    opts = qemu_opts_create(list, NULL, 0, &error_abort);
    g_assert(opts != NULL);
    g_assert(!QTAILQ_EMPTY(&list->head));

    /* now we've create the opts, must find it */
    opts = qemu_opts_find(list, NULL);
    g_assert(opts != NULL);

    qemu_opts_del(opts);

    /* should not find anything at this point */
    opts = qemu_opts_find(list, NULL);
    g_assert(opts == NULL);
}

static void test_qemu_opts_set(void)
{
    QemuOptsList *list;
    QemuOpts *opts;
    int ret;
    const char *opt;

    list = qemu_find_opts("opts_list_01");
    g_assert(list != NULL);
    g_assert(QTAILQ_EMPTY(&list->head));
    g_assert_cmpstr(list->name, ==, "opts_list_01");

    /* should not find anything at this point */
    opts = qemu_opts_find(list, NULL);
    g_assert(opts == NULL);

    /* implicitly create opts and set str3 value */
    ret = qemu_opts_set(list, NULL, "str3", "value");
    g_assert(ret == 0);
    g_assert(!QTAILQ_EMPTY(&list->head));

    /* get the just created opts */
    opts = qemu_opts_find(list, NULL);
    g_assert(opts != NULL);

    /* check the str3 value */
    opt = qemu_opt_get(opts, "str3");
    g_assert_cmpstr(opt, ==, "value");

    qemu_opts_del(opts);

    /* should not find anything at this point */
    opts = qemu_opts_find(list, NULL);
    g_assert(opts == NULL);
}

static void test_qemu_opt_unset(void)
{
    QemuOpts *opts;
    const char *value;
    int ret;

    /* dynamically initialized (parsed) opts */
    opts = qemu_opts_parse(&opts_list_03, "key=value", 0);
    g_assert(opts != NULL);

    /* check default/parsed value */
    value = qemu_opt_get(opts, "key");
    g_assert_cmpstr(value, ==, "value");

    /* reset it to value2 */
    qemu_opt_set(opts, "key", "value2");

    value = qemu_opt_get(opts, "key");
    g_assert_cmpstr(value, ==, "value2");

    /* unset, valid only for "accept any" */
    ret = qemu_opt_unset(opts, "key");
    g_assert(ret == 0);

    /* after reset the value should be the parsed/default one */
    value = qemu_opt_get(opts, "key");
    g_assert_cmpstr(value, ==, "value");

    qemu_opts_del(opts);
}

int socket_listen(SocketAddress *addr, Error **errp)
{
    QemuOpts *opts;
    int fd;

    opts = qemu_opts_create(&socket_optslist, NULL, 0, &error_abort);
    switch (addr->kind) {
    case SOCKET_ADDRESS_KIND_INET:
        inet_addr_to_opts(opts, addr->inet);
        fd = inet_listen_opts(opts, 0, errp);
        break;

    case SOCKET_ADDRESS_KIND_UNIX:
        qemu_opt_set(opts, "path", addr->q_unix->path, &error_abort);
        fd = unix_listen_opts(opts, errp);
        break;

    case SOCKET_ADDRESS_KIND_FD:
        fd = monitor_get_fd(cur_mon, addr->fd->str, errp);
        break;

    default:
        abort();
    }
    qemu_opts_del(opts);
    return fd;
}

int socket_connect(SocketAddress *addr, Error **errp,
                   NonBlockingConnectHandler *callback, void *opaque)
{
    QemuOpts *opts;
    int fd;

    opts = qemu_opts_create(&socket_optslist, NULL, 0, &error_abort);
    switch (addr->kind) {
    case SOCKET_ADDRESS_KIND_INET:
        inet_addr_to_opts(opts, addr->inet);
        fd = inet_connect_opts(opts, errp, callback, opaque);
        break;

    case SOCKET_ADDRESS_KIND_UNIX:
        qemu_opt_set(opts, "path", addr->q_unix->path, &error_abort);
        fd = unix_connect_opts(opts, errp, callback, opaque);
        break;

    case SOCKET_ADDRESS_KIND_FD:
        fd = monitor_get_fd(cur_mon, addr->fd->str, errp);
        if (fd >= 0 && callback) {
            qemu_set_nonblock(fd);
            callback(fd, NULL, opaque);
        }
        break;

    default:
        abort();
    }
    qemu_opts_del(opts);
    return fd;
}

/* compatibility wrapper */
int unix_listen(const char *str, char *ostr, int olen)
{
    QemuOpts *opts;
    char *path, *optstr;
    int sock, len;

    opts = qemu_opts_create(&dummy_opts, NULL, 0);

    optstr = strchr(str, ',');
    if (optstr) {
        len = optstr - str;
        if (len) {
            path = qemu_malloc(len+1);
            snprintf(path, len+1, "%.*s", len, str);
            qemu_opt_set(opts, "path", path);
            qemu_free(path);
        }
    } else {
        qemu_opt_set(opts, "path", str);
    }

    sock = unix_listen_opts(opts);

    if (sock != -1 && ostr)
        snprintf(ostr, olen, "%s%s", qemu_opt_get(opts, "path"), optstr ? optstr : "");
    qemu_opts_del(opts);
    return sock;
}

int inet_listen(const char *str, char *ostr, int olen,
                int socktype, int port_offset)
{
    QemuOpts *opts;
    char *optstr;
    int sock = -1;

    opts = qemu_opts_create(&dummy_opts, NULL, 0);
    if (inet_parse(opts, str) == 0) {
        sock = inet_listen_opts(opts, port_offset);
        if (sock != -1 && ostr) {
            optstr = strchr(str, ',');
            if (qemu_opt_get_bool(opts, "ipv6", 0)) {
                snprintf(ostr, olen, "[%s]:%s%s",
                         qemu_opt_get(opts, "host"),
                         qemu_opt_get(opts, "port"),
                         optstr ? optstr : "");
            } else {
                snprintf(ostr, olen, "%s:%s%s",
                         qemu_opt_get(opts, "host"),
                         qemu_opt_get(opts, "port"),
                         optstr ? optstr : "");
            }
        }
    }
    qemu_opts_del(opts);
    return sock;
}

static int raw_open_common(BlockDriverState *bs, QDict *options,
                           int bdrv_flags, int open_flags)
{
    BDRVRawState *s = bs->opaque;
    QemuOpts *opts;
    Error *local_err = NULL;
    const char *filename;
    int fd, ret;

    opts = qemu_opts_create_nofail(&raw_runtime_opts);
    qemu_opts_absorb_qdict(opts, options, &local_err);
    if (error_is_set(&local_err)) {
        qerror_report_err(local_err);
        error_free(local_err);
        ret = -EINVAL;
        goto fail;
    }

    filename = qemu_opt_get(opts, "filename");

    ret = raw_normalize_devicepath(&filename);
    if (ret != 0) {
        goto fail;
    }

    s->open_flags = open_flags;
    raw_parse_flags(bdrv_flags, &s->open_flags);

    s->fd = -1;
    fd = qemu_open(filename, s->open_flags, 0644);
    if (fd < 0) {
        ret = -errno;
        if (ret == -EROFS) {
            ret = -EACCES;
        }
        goto fail;
    }
    s->fd = fd;

#ifdef CONFIG_LINUX_AIO
    if (raw_set_aio(&s->aio_ctx, &s->use_aio, bdrv_flags)) {
        qemu_close(fd);
        ret = -errno;
        goto fail;
    }
#endif

    s->has_discard = 1;
#ifdef CONFIG_XFS
    if (platform_test_xfs_fd(s->fd)) {
        s->is_xfs = 1;
    }
#endif

    ret = 0;
fail:
    qemu_opts_del(opts);
    return ret;
}

static void test_qemu_opt_get_size(void)
{
    QemuOptsList *list;
    QemuOpts *opts;
    uint64_t opt;
    QDict *dict;

    list = qemu_find_opts("opts_list_02");
    g_assert(list != NULL);
    g_assert(QTAILQ_EMPTY(&list->head));
    g_assert_cmpstr(list->name, ==, "opts_list_02");

    /* should not find anything at this point */
    opts = qemu_opts_find(list, NULL);
    g_assert(opts == NULL);

    /* create the opts */
    opts = qemu_opts_create(list, NULL, 0, &error_abort);
    g_assert(opts != NULL);
    g_assert(!QTAILQ_EMPTY(&list->head));

    /* haven't set anything to size1 yet, so defval should be returned */
    opt = qemu_opt_get_size(opts, "size1", 5);
    g_assert(opt == 5);

    dict = qdict_new();
    g_assert(dict != NULL);

    qdict_put(dict, "size1", qstring_from_str("10"));

    qemu_opts_absorb_qdict(opts, dict, &error_abort);
    g_assert(error_abort == NULL);

    /* now we have set size1, should know about it */
    opt = qemu_opt_get_size(opts, "size1", 5);
    g_assert(opt == 10);

    /* reset value */
    qdict_put(dict, "size1", qstring_from_str("15"));

    qemu_opts_absorb_qdict(opts, dict, &error_abort);
    g_assert(error_abort == NULL);

    /* test the reset value */
    opt = qemu_opt_get_size(opts, "size1", 5);
    g_assert(opt == 15);

    qdict_del(dict, "size1");
    g_free(dict);

    qemu_opts_del(opts);

    /* should not find anything at this point */
    opts = qemu_opts_find(list, NULL);
    g_assert(opts == NULL);
}

static USBDevice *usb_msd_init(const char *filename)
{
    static int nr=0;
    char id[8];
    QemuOpts *opts;
    DriveInfo *dinfo;
    USBDevice *dev;
    int fatal_error;
    const char *p1;
    char fmt[32];

    /* parse -usbdevice disk: syntax into drive opts */
    snprintf(id, sizeof(id), "usb%d", nr++);
    opts = qemu_opts_create(&qemu_drive_opts, id, 0);

    p1 = strchr(filename, ':');
    if (p1++) {
        const char *p2;

        if (strstart(filename, "format=", &p2)) {
            int len = MIN(p1 - p2, sizeof(fmt));
            pstrcpy(fmt, len, p2);
            qemu_opt_set(opts, "format", fmt);
        } else if (*filename != ':') {
            printf("unrecognized USB mass-storage option %s\n", filename);
            return NULL;
        }
        filename = p1;
    }
    if (!*filename) {
        printf("block device specification needed\n");
        return NULL;
    }
    qemu_opt_set(opts, "file", filename);
    qemu_opt_set(opts, "if", "none");

    /* create host drive */
    dinfo = drive_init(opts, NULL, &fatal_error);
    if (!dinfo) {
        qemu_opts_del(opts);
        return NULL;
    }

    /* create guest device */
    dev = usb_create(NULL /* FIXME */, "usb-storage");
    if (!dev) {
        return NULL;
    }
    qdev_prop_set_drive(&dev->qdev, "drive", dinfo);
    if (qdev_init(&dev->qdev) < 0)
        return NULL;

    return dev;
}