qdev: split out UI portions into a new function

qdev-monitor.c deals with the -device, device_add, and info qdm/qtree
interfaces.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 585 insertions, 0 deletions

diff --git a/hw/qdev-monitor.c b/hw/qdev-monitor.c
new file mode 100644
index 0000000..841e1ad
--- /dev/null
+++ b/hw/qdev-monitor.c
@@ -0,0 +1,585 @@
+/*
+ *  Dynamic device configuration and creation.
+ *
+ *  Copyright (c) 2009 CodeSourcery
+ *
+ * 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 "qdev.h"
+#include "monitor.h"
+
+/*
+ * Aliases were a bad idea from the start.  Let's keep them
+ * from spreading further.
+ */
+typedef struct QDevAlias
+{
+    const char *typename;
+    const char *alias;
+} QDevAlias;
+
+static const QDevAlias qdev_alias_table[] = {
+    { "virtio-blk-pci", "virtio-blk" },
+    { "virtio-net-pci", "virtio-net" },
+    { "virtio-serial-pci", "virtio-serial" },
+    { "virtio-balloon-pci", "virtio-balloon" },
+    { "virtio-blk-s390", "virtio-blk" },
+    { "virtio-net-s390", "virtio-net" },
+    { "virtio-serial-s390", "virtio-serial" },
+    { "lsi53c895a", "lsi" },
+    { "ich9-ahci", "ahci" },
+    { }
+};
+
+static const char *qdev_class_get_alias(DeviceClass *dc)
+{
+    const char *typename = object_class_get_name(OBJECT_CLASS(dc));
+    int i;
+
+    for (i = 0; qdev_alias_table[i].typename; i++) {
+        if (strcmp(qdev_alias_table[i].typename, typename) == 0) {
+            return qdev_alias_table[i].alias;
+        }
+    }
+
+    return NULL;
+}
+
+static bool qdev_class_has_alias(DeviceClass *dc)
+{
+    return (qdev_class_get_alias(dc) != NULL);
+}
+
+static void qdev_print_devinfo(ObjectClass *klass, void *opaque)
+{
+    DeviceClass *dc;
+    bool *show_no_user = opaque;
+
+    dc = (DeviceClass *)object_class_dynamic_cast(klass, TYPE_DEVICE);
+
+    if (!dc || (show_no_user && !*show_no_user && dc->no_user)) {
+        return;
+    }
+
+    error_printf("name \"%s\"", object_class_get_name(klass));
+    if (dc->bus_info) {
+        error_printf(", bus %s", dc->bus_info->name);
+    }
+    if (qdev_class_has_alias(dc)) {
+        error_printf(", alias \"%s\"", qdev_class_get_alias(dc));
+    }
+    if (dc->desc) {
+        error_printf(", desc \"%s\"", dc->desc);
+    }
+    if (dc->no_user) {
+        error_printf(", no-user");
+    }
+    error_printf("\n");
+}
+
+static int set_property(const char *name, const char *value, void *opaque)
+{
+    DeviceState *dev = opaque;
+
+    if (strcmp(name, "driver") == 0)
+        return 0;
+    if (strcmp(name, "bus") == 0)
+        return 0;
+
+    if (qdev_prop_parse(dev, name, value) == -1) {
+        return -1;
+    }
+    return 0;
+}
+
+static const char *find_typename_by_alias(const char *alias)
+{
+    int i;
+
+    for (i = 0; qdev_alias_table[i].alias; i++) {
+        if (strcmp(qdev_alias_table[i].alias, alias) == 0) {
+            return qdev_alias_table[i].typename;
+        }
+    }
+
+    return NULL;
+}
+
+int qdev_device_help(QemuOpts *opts)
+{
+    const char *driver;
+    Property *prop;
+    ObjectClass *klass;
+    DeviceClass *info;
+
+    driver = qemu_opt_get(opts, "driver");
+    if (driver && !strcmp(driver, "?")) {
+        bool show_no_user = false;
+        object_class_foreach(qdev_print_devinfo, TYPE_DEVICE, false, &show_no_user);
+        return 1;
+    }
+
+    if (!driver || !qemu_opt_get(opts, "?")) {
+        return 0;
+    }
+
+    klass = object_class_by_name(driver);
+    if (!klass) {
+        const char *typename = find_typename_by_alias(driver);
+
+        if (typename) {
+            driver = typename;
+            klass = object_class_by_name(driver);
+        }
+    }
+
+    if (!klass) {
+        return 0;
+    }
+    info = DEVICE_CLASS(klass);
+
+    for (prop = info->props; prop && prop->name; prop++) {
+        /*
+         * TODO Properties without a parser are just for dirty hacks.
+         * qdev_prop_ptr is the only such PropertyInfo.  It's marked
+         * for removal.  This conditional should be removed along with
+         * it.
+         */
+        if (!prop->info->parse) {
+            continue;           /* no way to set it, don't show */
+        }
+        error_printf("%s.%s=%s\n", driver, prop->name,
+                     prop->info->legacy_name ?: prop->info->name);
+    }
+    for (prop = info->bus_info->props; prop && prop->name; prop++) {
+        if (!prop->info->parse) {
+            continue;           /* no way to set it, don't show */
+        }
+        error_printf("%s.%s=%s\n", driver, prop->name,
+                     prop->info->legacy_name ?: prop->info->name);
+    }
+    return 1;
+}
+
+static DeviceState *qdev_get_peripheral(void)
+{
+    static DeviceState *dev;
+
+    if (dev == NULL) {
+        dev = qdev_create(NULL, "container");
+        qdev_property_add_child(qdev_get_root(), "peripheral", dev, NULL);
+        qdev_init_nofail(dev);
+    }
+
+    return dev;
+}
+
+static DeviceState *qdev_get_peripheral_anon(void)
+{
+    static DeviceState *dev;
+
+    if (dev == NULL) {
+        dev = qdev_create(NULL, "container");
+        qdev_property_add_child(qdev_get_root(), "peripheral-anon", dev, NULL);
+        qdev_init_nofail(dev);
+    }
+
+    return dev;
+}
+
+static void qbus_list_bus(DeviceState *dev)
+{
+    BusState *child;
+    const char *sep = " ";
+
+    error_printf("child busses at \"%s\":",
+                 dev->id ? dev->id : object_get_typename(OBJECT(dev)));
+    QLIST_FOREACH(child, &dev->child_bus, sibling) {
+        error_printf("%s\"%s\"", sep, child->name);
+        sep = ", ";
+    }
+    error_printf("\n");
+}
+
+static void qbus_list_dev(BusState *bus)
+{
+    DeviceState *dev;
+    const char *sep = " ";
+
+    error_printf("devices at \"%s\":", bus->name);
+    QTAILQ_FOREACH(dev, &bus->children, sibling) {
+        error_printf("%s\"%s\"", sep, object_get_typename(OBJECT(dev)));
+        if (dev->id)
+            error_printf("/\"%s\"", dev->id);
+        sep = ", ";
+    }
+    error_printf("\n");
+}
+
+static BusState *qbus_find_bus(DeviceState *dev, char *elem)
+{
+    BusState *child;
+
+    QLIST_FOREACH(child, &dev->child_bus, sibling) {
+        if (strcmp(child->name, elem) == 0) {
+            return child;
+        }
+    }
+    return NULL;
+}
+
+static DeviceState *qbus_find_dev(BusState *bus, char *elem)
+{
+    DeviceState *dev;
+
+    /*
+     * try to match in order:
+     *   (1) instance id, if present
+     *   (2) driver name
+     *   (3) driver alias, if present
+     */
+    QTAILQ_FOREACH(dev, &bus->children, sibling) {
+        if (dev->id  &&  strcmp(dev->id, elem) == 0) {
+            return dev;
+        }
+    }
+    QTAILQ_FOREACH(dev, &bus->children, sibling) {
+        if (strcmp(object_get_typename(OBJECT(dev)), elem) == 0) {
+            return dev;
+        }
+    }
+    QTAILQ_FOREACH(dev, &bus->children, sibling) {
+        DeviceClass *dc = DEVICE_GET_CLASS(dev);
+
+        if (qdev_class_has_alias(dc) &&
+            strcmp(qdev_class_get_alias(dc), elem) == 0) {
+            return dev;
+        }
+    }
+    return NULL;
+}
+
+static BusState *qbus_find_recursive(BusState *bus, const char *name,
+                                     const BusInfo *info)
+{
+    DeviceState *dev;
+    BusState *child, *ret;
+    int match = 1;
+
+    if (name && (strcmp(bus->name, name) != 0)) {
+        match = 0;
+    }
+    if (info && (bus->info != info)) {
+        match = 0;
+    }
+    if (match) {
+        return bus;
+    }
+
+    QTAILQ_FOREACH(dev, &bus->children, sibling) {
+        QLIST_FOREACH(child, &dev->child_bus, sibling) {
+            ret = qbus_find_recursive(child, name, info);
+            if (ret) {
+                return ret;
+            }
+        }
+    }
+    return NULL;
+}
+
+static BusState *qbus_find(const char *path)
+{
+    DeviceState *dev;
+    BusState *bus;
+    char elem[128];
+    int pos, len;
+
+    /* find start element */
+    if (path[0] == '/') {
+        bus = sysbus_get_default();
+        pos = 0;
+    } else {
+        if (sscanf(path, "%127[^/]%n", elem, &len) != 1) {
+            assert(!path[0]);
+            elem[0] = len = 0;
+        }
+        bus = qbus_find_recursive(sysbus_get_default(), elem, NULL);
+        if (!bus) {
+            qerror_report(QERR_BUS_NOT_FOUND, elem);
+            return NULL;
+        }
+        pos = len;
+    }
+
+    for (;;) {
+        assert(path[pos] == '/' || !path[pos]);
+        while (path[pos] == '/') {
+            pos++;
+        }
+        if (path[pos] == '\0') {
+            return bus;
+        }
+
+        /* find device */
+        if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
+            assert(0);
+            elem[0] = len = 0;
+        }
+        pos += len;
+        dev = qbus_find_dev(bus, elem);
+        if (!dev) {
+            qerror_report(QERR_DEVICE_NOT_FOUND, elem);
+            if (!monitor_cur_is_qmp()) {
+                qbus_list_dev(bus);
+            }
+            return NULL;
+        }
+
+        assert(path[pos] == '/' || !path[pos]);
+        while (path[pos] == '/') {
+            pos++;
+        }
+        if (path[pos] == '\0') {
+            /* last specified element is a device.  If it has exactly
+             * one child bus accept it nevertheless */
+            switch (dev->num_child_bus) {
+            case 0:
+                qerror_report(QERR_DEVICE_NO_BUS, elem);
+                return NULL;
+            case 1:
+                return QLIST_FIRST(&dev->child_bus);
+            default:
+                qerror_report(QERR_DEVICE_MULTIPLE_BUSSES, elem);
+                if (!monitor_cur_is_qmp()) {
+                    qbus_list_bus(dev);
+                }
+                return NULL;
+            }
+        }
+
+        /* find bus */
+        if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
+            assert(0);
+            elem[0] = len = 0;
+        }
+        pos += len;
+        bus = qbus_find_bus(dev, elem);
+        if (!bus) {
+            qerror_report(QERR_BUS_NOT_FOUND, elem);
+            if (!monitor_cur_is_qmp()) {
+                qbus_list_bus(dev);
+            }
+            return NULL;
+        }
+    }
+}
+
+DeviceState *qdev_device_add(QemuOpts *opts)
+{
+    ObjectClass *obj;
+    DeviceClass *k;
+    const char *driver, *path, *id;
+    DeviceState *qdev;
+    BusState *bus;
+
+    driver = qemu_opt_get(opts, "driver");
+    if (!driver) {
+        qerror_report(QERR_MISSING_PARAMETER, "driver");
+        return NULL;
+    }
+
+    /* find driver */
+    obj = object_class_by_name(driver);
+    if (!obj) {
+        const char *typename = find_typename_by_alias(driver);
+
+        if (typename) {
+            driver = typename;
+            obj = object_class_by_name(driver);
+        }
+    }
+
+    if (!obj) {
+        qerror_report(QERR_INVALID_PARAMETER_VALUE, "driver", "device type");
+        return NULL;
+    }
+
+    k = DEVICE_CLASS(obj);
+
+    /* find bus */
+    path = qemu_opt_get(opts, "bus");
+    if (path != NULL) {
+        bus = qbus_find(path);
+        if (!bus) {
+            return NULL;
+        }
+        if (bus->info != k->bus_info) {
+            qerror_report(QERR_BAD_BUS_FOR_DEVICE,
+                           driver, bus->info->name);
+            return NULL;
+        }
+    } else {
+        bus = qbus_find_recursive(sysbus_get_default(), NULL, k->bus_info);
+        if (!bus) {
+            qerror_report(QERR_NO_BUS_FOR_DEVICE,
+                          driver, k->bus_info->name);
+            return NULL;
+        }
+    }
+    if (qdev_hotplug && !bus->allow_hotplug) {
+        qerror_report(QERR_BUS_NO_HOTPLUG, bus->name);
+        return NULL;
+    }
+
+    if (!bus) {
+        bus = sysbus_get_default();
+    }
+
+    /* create device, set properties */
+    qdev = DEVICE(object_new(driver));
+    qdev_set_parent_bus(qdev, bus);
+    qdev_prop_set_globals(qdev);
+
+    id = qemu_opts_id(opts);
+    if (id) {
+        qdev->id = id;
+        qdev_property_add_child(qdev_get_peripheral(), qdev->id, qdev, NULL);
+    } else {
+        static int anon_count;
+        gchar *name = g_strdup_printf("device[%d]", anon_count++);
+        qdev_property_add_child(qdev_get_peripheral_anon(), name,
+                                qdev, NULL);
+        g_free(name);
+    }        
+    if (qemu_opt_foreach(opts, set_property, qdev, 1) != 0) {
+        qdev_free(qdev);
+        return NULL;
+    }
+    if (qdev_init(qdev) < 0) {
+        qerror_report(QERR_DEVICE_INIT_FAILED, driver);
+        return NULL;
+    }
+    qdev->opts = opts;
+    return qdev;
+}
+
+
+#define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__)
+static void qbus_print(Monitor *mon, BusState *bus, int indent);
+
+static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props,
+                             const char *prefix, int indent)
+{
+    char buf[64];
+
+    if (!props)
+        return;
+    while (props->name) {
+        /*
+         * TODO Properties without a print method are just for dirty
+         * hacks.  qdev_prop_ptr is the only such PropertyInfo.  It's
+         * marked for removal.  The test props->info->print should be
+         * removed along with it.
+         */
+        if (props->info->print) {
+            props->info->print(dev, props, buf, sizeof(buf));
+            qdev_printf("%s-prop: %s = %s\n", prefix, props->name, buf);
+        }
+        props++;
+    }
+}
+
+static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
+{
+    BusState *child;
+    qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)),
+                dev->id ? dev->id : "");
+    indent += 2;
+    if (dev->num_gpio_in) {
+        qdev_printf("gpio-in %d\n", dev->num_gpio_in);
+    }
+    if (dev->num_gpio_out) {
+        qdev_printf("gpio-out %d\n", dev->num_gpio_out);
+    }
+    qdev_print_props(mon, dev, qdev_get_props(dev), "dev", indent);
+    qdev_print_props(mon, dev, dev->parent_bus->info->props, "bus", indent);
+    if (dev->parent_bus->info->print_dev)
+        dev->parent_bus->info->print_dev(mon, dev, indent);
+    QLIST_FOREACH(child, &dev->child_bus, sibling) {
+        qbus_print(mon, child, indent);
+    }
+}
+
+static void qbus_print(Monitor *mon, BusState *bus, int indent)
+{
+    struct DeviceState *dev;
+
+    qdev_printf("bus: %s\n", bus->name);
+    indent += 2;
+    qdev_printf("type %s\n", bus->info->name);
+    QTAILQ_FOREACH(dev, &bus->children, sibling) {
+        qdev_print(mon, dev, indent);
+    }
+}
+#undef qdev_printf
+
+void do_info_qtree(Monitor *mon)
+{
+    if (sysbus_get_default())
+        qbus_print(mon, sysbus_get_default(), 0);
+}
+
+void do_info_qdm(Monitor *mon)
+{
+    object_class_foreach(qdev_print_devinfo, TYPE_DEVICE, false, NULL);
+}
+
+int do_device_add(Monitor *mon, const QDict *qdict, QObject **ret_data)
+{
+    QemuOpts *opts;
+
+    opts = qemu_opts_from_qdict(qemu_find_opts("device"), qdict);
+    if (!opts) {
+        return -1;
+    }
+    if (!monitor_cur_is_qmp() && qdev_device_help(opts)) {
+        qemu_opts_del(opts);
+        return 0;
+    }
+    if (!qdev_device_add(opts)) {
+        qemu_opts_del(opts);
+        return -1;
+    }
+    return 0;
+}
+
+int do_device_del(Monitor *mon, const QDict *qdict, QObject **ret_data)
+{
+    const char *id = qdict_get_str(qdict, "id");
+    DeviceState *dev;
+
+    dev = qdev_find_recursive(sysbus_get_default(), id);
+    if (NULL == dev) {
+        qerror_report(QERR_DEVICE_NOT_FOUND, id);
+        return -1;
+    }
+    return qdev_unplug(dev);
+}
+
+void qdev_machine_init(void)
+{
+    qdev_get_peripheral_anon();
+    qdev_get_peripheral();
+}