diff options
Diffstat (limited to 'src/hw/core/qdev-properties-system.c')
| -rw-r--r-- | src/hw/core/qdev-properties-system.c | 425 |
1 files changed, 425 insertions, 0 deletions
diff --git a/src/hw/core/qdev-properties-system.c b/src/hw/core/qdev-properties-system.c new file mode 100644 index 0000000..921e799 --- /dev/null +++ b/src/hw/core/qdev-properties-system.c @@ -0,0 +1,425 @@ +/* + * 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); +} |
