--- /dev/null
+/*
+ * qdev property parsing and global properties
+ * (parts specific for qemu-system-*)
+ *
+ * This file is based on code from hw/qdev-properties.c from
+ * commit 074a86fccd185616469dfcdc0e157f438aebba18,
+ * Copyright (c) Gerd Hoffmann <kraxel@redhat.com> and other contributors.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include "net/net.h"
+#include "hw/qdev.h"
+#include "qapi/qmp/qerror.h"
+#include "sysemu/block-backend.h"
+#include "sysemu/blockdev.h"
+#include "hw/block/block.h"
+#include "net/hub.h"
+#include "qapi/visitor.h"
+#include "sysemu/char.h"
+#include "sysemu/iothread.h"
+
+static void get_pointer(Object *obj, Visitor *v, Property *prop,
+ char *(*print)(void *ptr),
+ const char *name, Error **errp)
+{
+ DeviceState *dev = DEVICE(obj);
+ void **ptr = qdev_get_prop_ptr(dev, prop);
+ char *p;
+
+ p = *ptr ? print(*ptr) : g_strdup("");
+ visit_type_str(v, &p, name, errp);
+ g_free(p);
+}
+
+static void set_pointer(Object *obj, Visitor *v, Property *prop,
+ void (*parse)(DeviceState *dev, const char *str,
+ void **ptr, const char *propname,
+ Error **errp),
+ const char *name, Error **errp)
+{
+ DeviceState *dev = DEVICE(obj);
+ Error *local_err = NULL;
+ void **ptr = qdev_get_prop_ptr(dev, prop);
+ char *str;
+
+ if (dev->realized) {
+ qdev_prop_set_after_realize(dev, name, errp);
+ return;
+ }
+
+ visit_type_str(v, &str, name, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ return;
+ }
+ if (!*str) {
+ g_free(str);
+ *ptr = NULL;
+ return;
+ }
+ parse(dev, str, ptr, prop->name, errp);
+ g_free(str);
+}
+
+/* --- drive --- */
+
+static void parse_drive(DeviceState *dev, const char *str, void **ptr,
+ const char *propname, Error **errp)
+{
+ BlockBackend *blk;
+
+ blk = blk_by_name(str);
+ if (!blk) {
+ error_setg(errp, "Property '%s.%s' can't find value '%s'",
+ object_get_typename(OBJECT(dev)), propname, str);
+ return;
+ }
+ if (blk_attach_dev(blk, dev) < 0) {
+ DriveInfo *dinfo = blk_legacy_dinfo(blk);
+
+ if (dinfo->type != IF_NONE) {
+ error_setg(errp, "Drive '%s' is already in use because "
+ "it has been automatically connected to another "
+ "device (did you need 'if=none' in the drive options?)",
+ str);
+ } else {
+ error_setg(errp, "Drive '%s' is already in use by another device",
+ str);
+ }
+ return;
+ }
+ *ptr = blk;
+}
+
+static void release_drive(Object *obj, const char *name, void *opaque)
+{
+ DeviceState *dev = DEVICE(obj);
+ Property *prop = opaque;
+ BlockBackend **ptr = qdev_get_prop_ptr(dev, prop);
+
+ if (*ptr) {
+ blk_detach_dev(*ptr, dev);
+ blockdev_auto_del(*ptr);
+ }
+}
+
+static char *print_drive(void *ptr)
+{
+ return g_strdup(blk_name(ptr));
+}
+
+static void get_drive(Object *obj, Visitor *v, void *opaque,
+ const char *name, Error **errp)
+{
+ get_pointer(obj, v, opaque, print_drive, name, errp);
+}
+
+static void set_drive(Object *obj, Visitor *v, void *opaque,
+ const char *name, Error **errp)
+{
+ set_pointer(obj, v, opaque, parse_drive, name, errp);
+}
+
+PropertyInfo qdev_prop_drive = {
+ .name = "str",
+ .description = "ID of a drive to use as a backend",
+ .get = get_drive,
+ .set = set_drive,
+ .release = release_drive,
+};
+
+/* --- character device --- */
+
+static void parse_chr(DeviceState *dev, const char *str, void **ptr,
+ const char *propname, Error **errp)
+{
+ CharDriverState *chr = qemu_chr_find(str);
+ if (chr == NULL) {
+ error_setg(errp, "Property '%s.%s' can't find value '%s'",
+ object_get_typename(OBJECT(dev)), propname, str);
+ return;
+ }
+ if (qemu_chr_fe_claim(chr) != 0) {
+ error_setg(errp, "Property '%s.%s' can't take value '%s', it's in use",
+ object_get_typename(OBJECT(dev)), propname, str);
+ return;
+ }
+ *ptr = chr;
+}
+
+static void release_chr(Object *obj, const char *name, void *opaque)
+{
+ DeviceState *dev = DEVICE(obj);
+ Property *prop = opaque;
+ CharDriverState **ptr = qdev_get_prop_ptr(dev, prop);
+ CharDriverState *chr = *ptr;
+
+ if (chr) {
+ qemu_chr_add_handlers(chr, NULL, NULL, NULL, NULL);
+ qemu_chr_fe_release(chr);
+ }
+}
+
+
+static char *print_chr(void *ptr)
+{
+ CharDriverState *chr = ptr;
+ const char *val = chr->label ? chr->label : "";
+
+ return g_strdup(val);
+}
+
+static void get_chr(Object *obj, Visitor *v, void *opaque,
+ const char *name, Error **errp)
+{
+ get_pointer(obj, v, opaque, print_chr, name, errp);
+}
+
+static void set_chr(Object *obj, Visitor *v, void *opaque,
+ const char *name, Error **errp)
+{
+ set_pointer(obj, v, opaque, parse_chr, name, errp);
+}
+
+PropertyInfo qdev_prop_chr = {
+ .name = "str",
+ .description = "ID of a chardev to use as a backend",
+ .get = get_chr,
+ .set = set_chr,
+ .release = release_chr,
+};
+
+/* --- netdev device --- */
+static void get_netdev(Object *obj, Visitor *v, void *opaque,
+ const char *name, Error **errp)
+{
+ DeviceState *dev = DEVICE(obj);
+ Property *prop = opaque;
+ NICPeers *peers_ptr = qdev_get_prop_ptr(dev, prop);
+ char *p = g_strdup(peers_ptr->ncs[0] ? peers_ptr->ncs[0]->name : "");
+
+ visit_type_str(v, &p, name, errp);
+ g_free(p);
+}
+
+static void set_netdev(Object *obj, Visitor *v, void *opaque,
+ const char *name, Error **errp)
+{
+ DeviceState *dev = DEVICE(obj);
+ Property *prop = opaque;
+ NICPeers *peers_ptr = qdev_get_prop_ptr(dev, prop);
+ NetClientState **ncs = peers_ptr->ncs;
+ NetClientState *peers[MAX_QUEUE_NUM];
+ Error *local_err = NULL;
+ int queues, err = 0, i = 0;
+ char *str;
+
+ if (dev->realized) {
+ qdev_prop_set_after_realize(dev, name, errp);
+ return;
+ }
+
+ visit_type_str(v, &str, name, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ return;
+ }
+
+ queues = qemu_find_net_clients_except(str, peers,
+ NET_CLIENT_OPTIONS_KIND_NIC,
+ MAX_QUEUE_NUM);
+ if (queues == 0) {
+ err = -ENOENT;
+ goto out;
+ }
+
+ if (queues > MAX_QUEUE_NUM) {
+ error_setg(errp, "queues of backend '%s'(%d) exceeds QEMU limitation(%d)",
+ str, queues, MAX_QUEUE_NUM);
+ goto out;
+ }
+
+ for (i = 0; i < queues; i++) {
+ if (peers[i] == NULL) {
+ err = -ENOENT;
+ goto out;
+ }
+
+ if (peers[i]->peer) {
+ err = -EEXIST;
+ goto out;
+ }
+
+ if (ncs[i]) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ ncs[i] = peers[i];
+ ncs[i]->queue_index = i;
+ }
+
+ peers_ptr->queues = queues;
+
+out:
+ error_set_from_qdev_prop_error(errp, err, dev, prop, str);
+ g_free(str);
+}
+
+PropertyInfo qdev_prop_netdev = {
+ .name = "str",
+ .description = "ID of a netdev to use as a backend",
+ .get = get_netdev,
+ .set = set_netdev,
+};
+
+/* --- vlan --- */
+
+static int print_vlan(DeviceState *dev, Property *prop, char *dest, size_t len)
+{
+ NetClientState **ptr = qdev_get_prop_ptr(dev, prop);
+
+ if (*ptr) {
+ int id;
+ if (!net_hub_id_for_client(*ptr, &id)) {
+ return snprintf(dest, len, "%d", id);
+ }
+ }
+
+ return snprintf(dest, len, "<null>");
+}
+
+static void get_vlan(Object *obj, Visitor *v, void *opaque,
+ const char *name, Error **errp)
+{
+ DeviceState *dev = DEVICE(obj);
+ Property *prop = opaque;
+ NetClientState **ptr = qdev_get_prop_ptr(dev, prop);
+ int32_t id = -1;
+
+ if (*ptr) {
+ int hub_id;
+ if (!net_hub_id_for_client(*ptr, &hub_id)) {
+ id = hub_id;
+ }
+ }
+
+ visit_type_int32(v, &id, name, errp);
+}
+
+static void set_vlan(Object *obj, Visitor *v, void *opaque,
+ const char *name, Error **errp)
+{
+ DeviceState *dev = DEVICE(obj);
+ Property *prop = opaque;
+ NICPeers *peers_ptr = qdev_get_prop_ptr(dev, prop);
+ NetClientState **ptr = &peers_ptr->ncs[0];
+ Error *local_err = NULL;
+ int32_t id;
+ NetClientState *hubport;
+
+ if (dev->realized) {
+ qdev_prop_set_after_realize(dev, name, errp);
+ return;
+ }
+
+ visit_type_int32(v, &id, name, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ return;
+ }
+ if (id == -1) {
+ *ptr = NULL;
+ return;
+ }
+ if (*ptr) {
+ error_set_from_qdev_prop_error(errp, -EINVAL, dev, prop, name);
+ return;
+ }
+
+ hubport = net_hub_port_find(id);
+ if (!hubport) {
+ error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
+ name, prop->info->name);
+ return;
+ }
+ *ptr = hubport;
+}
+
+PropertyInfo qdev_prop_vlan = {
+ .name = "int32",
+ .description = "Integer VLAN id to connect to",
+ .print = print_vlan,
+ .get = get_vlan,
+ .set = set_vlan,
+};
+
+void qdev_prop_set_drive(DeviceState *dev, const char *name,
+ BlockBackend *value, Error **errp)
+{
+ object_property_set_str(OBJECT(dev), value ? blk_name(value) : "",
+ name, errp);
+}
+
+void qdev_prop_set_drive_nofail(DeviceState *dev, const char *name,
+ BlockBackend *value)
+{
+ Error *err = NULL;
+
+ qdev_prop_set_drive(dev, name, value, &err);
+ if (err) {
+ error_report_err(err);
+ exit(1);
+ }
+}
+
+void qdev_prop_set_chr(DeviceState *dev, const char *name,
+ CharDriverState *value)
+{
+ assert(!value || value->label);
+ object_property_set_str(OBJECT(dev),
+ value ? value->label : "", name, &error_abort);
+}
+
+void qdev_prop_set_netdev(DeviceState *dev, const char *name,
+ NetClientState *value)
+{
+ assert(!value || value->name);
+ object_property_set_str(OBJECT(dev),
+ value ? value->name : "", name, &error_abort);
+}
+
+void qdev_set_nic_properties(DeviceState *dev, NICInfo *nd)
+{
+ qdev_prop_set_macaddr(dev, "mac", nd->macaddr.a);
+ if (nd->netdev) {
+ qdev_prop_set_netdev(dev, "netdev", nd->netdev);
+ }
+ if (nd->nvectors != DEV_NVECTORS_UNSPECIFIED &&
+ object_property_find(OBJECT(dev), "vectors", NULL)) {
+ qdev_prop_set_uint32(dev, "vectors", nd->nvectors);
+ }
+ nd->instantiated = 1;
+}
+
+static int qdev_add_one_global(void *opaque, QemuOpts *opts, Error **errp)
+{
+ GlobalProperty *g;
+
+ g = g_malloc0(sizeof(*g));
+ g->driver = qemu_opt_get(opts, "driver");
+ g->property = qemu_opt_get(opts, "property");
+ g->value = qemu_opt_get(opts, "value");
+ g->user_provided = true;
+ qdev_prop_register_global(g);
+ return 0;
+}
+
+void qemu_add_globals(void)
+{
+ qemu_opts_foreach(qemu_find_opts("global"),
+ qdev_add_one_global, NULL, NULL);
+}
Code Review / kvmfornfv.git / blobdiff