| /* |
| * qdev property parsing |
| * (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 "qemu/osdep.h" |
| #include "audio/audio.h" |
| #include "net/net.h" |
| #include "hw/qdev-properties.h" |
| #include "qapi/error.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 "chardev/char-fe.h" |
| #include "sysemu/iothread.h" |
| #include "sysemu/tpm_backend.h" |
| |
| static bool check_prop_still_unset(DeviceState *dev, const char *name, |
| const void *old_val, const char *new_val, |
| Error **errp) |
| { |
| const GlobalProperty *prop = qdev_find_global_prop(dev, name); |
| |
| if (!old_val) { |
| return true; |
| } |
| |
| if (prop) { |
| error_setg(errp, "-global %s.%s=... conflicts with %s=%s", |
| prop->driver, prop->property, name, new_val); |
| } else { |
| /* Error message is vague, but a better one would be hard */ |
| error_setg(errp, "%s=%s conflicts, and override is not implemented", |
| name, new_val); |
| } |
| return false; |
| } |
| |
| |
| /* --- drive --- */ |
| |
| static void get_drive(Object *obj, Visitor *v, const char *name, void *opaque, |
| Error **errp) |
| { |
| DeviceState *dev = DEVICE(obj); |
| Property *prop = opaque; |
| void **ptr = qdev_get_prop_ptr(dev, prop); |
| const char *value; |
| char *p; |
| |
| if (*ptr) { |
| value = blk_name(*ptr); |
| if (!*value) { |
| BlockDriverState *bs = blk_bs(*ptr); |
| if (bs) { |
| value = bdrv_get_node_name(bs); |
| } |
| } |
| } else { |
| value = ""; |
| } |
| |
| p = g_strdup(value); |
| visit_type_str(v, name, &p, errp); |
| g_free(p); |
| } |
| |
| static void set_drive_helper(Object *obj, Visitor *v, const char *name, |
| void *opaque, bool iothread, Error **errp) |
| { |
| DeviceState *dev = DEVICE(obj); |
| Property *prop = opaque; |
| void **ptr = qdev_get_prop_ptr(dev, prop); |
| char *str; |
| BlockBackend *blk; |
| bool blk_created = false; |
| int ret; |
| |
| if (dev->realized) { |
| qdev_prop_set_after_realize(dev, name, errp); |
| return; |
| } |
| |
| if (!visit_type_str(v, name, &str, errp)) { |
| return; |
| } |
| |
| /* |
| * TODO Should this really be an error? If no, the old value |
| * needs to be released before we store the new one. |
| */ |
| if (!check_prop_still_unset(dev, name, *ptr, str, errp)) { |
| return; |
| } |
| |
| if (!*str) { |
| g_free(str); |
| *ptr = NULL; |
| return; |
| } |
| |
| blk = blk_by_name(str); |
| if (!blk) { |
| BlockDriverState *bs = bdrv_lookup_bs(NULL, str, NULL); |
| if (bs) { |
| /* |
| * If the device supports iothreads, it will make sure to move the |
| * block node to the right AioContext if necessary (or fail if this |
| * isn't possible because of other users). Devices that are not |
| * aware of iothreads require their BlockBackends to be in the main |
| * AioContext. |
| */ |
| AioContext *ctx = iothread ? bdrv_get_aio_context(bs) : |
| qemu_get_aio_context(); |
| blk = blk_new(ctx, 0, BLK_PERM_ALL); |
| blk_created = true; |
| |
| ret = blk_insert_bs(blk, bs, errp); |
| if (ret < 0) { |
| goto fail; |
| } |
| } |
| } |
| if (!blk) { |
| error_setg(errp, "Property '%s.%s' can't find value '%s'", |
| object_get_typename(OBJECT(dev)), prop->name, str); |
| goto fail; |
| } |
| if (blk_attach_dev(blk, dev) < 0) { |
| DriveInfo *dinfo = blk_legacy_dinfo(blk); |
| |
| if (dinfo && 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); |
| } |
| goto fail; |
| } |
| |
| *ptr = blk; |
| |
| fail: |
| if (blk_created) { |
| /* If we need to keep a reference, blk_attach_dev() took it */ |
| blk_unref(blk); |
| } |
| |
| g_free(str); |
| } |
| |
| static void set_drive(Object *obj, Visitor *v, const char *name, void *opaque, |
| Error **errp) |
| { |
| set_drive_helper(obj, v, name, opaque, false, errp); |
| } |
| |
| static void set_drive_iothread(Object *obj, Visitor *v, const char *name, |
| void *opaque, Error **errp) |
| { |
| set_drive_helper(obj, v, name, opaque, true, errp); |
| } |
| |
| 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) { |
| AioContext *ctx = blk_get_aio_context(*ptr); |
| |
| aio_context_acquire(ctx); |
| blockdev_auto_del(*ptr); |
| blk_detach_dev(*ptr, dev); |
| aio_context_release(ctx); |
| } |
| } |
| |
| const PropertyInfo qdev_prop_drive = { |
| .name = "str", |
| .description = "Node name or ID of a block device to use as a backend", |
| .get = get_drive, |
| .set = set_drive, |
| .release = release_drive, |
| }; |
| |
| const PropertyInfo qdev_prop_drive_iothread = { |
| .name = "str", |
| .description = "Node name or ID of a block device to use as a backend", |
| .get = get_drive, |
| .set = set_drive_iothread, |
| .release = release_drive, |
| }; |
| |
| /* --- character device --- */ |
| |
| static void get_chr(Object *obj, Visitor *v, const char *name, void *opaque, |
| Error **errp) |
| { |
| DeviceState *dev = DEVICE(obj); |
| CharBackend *be = qdev_get_prop_ptr(dev, opaque); |
| char *p; |
| |
| p = g_strdup(be->chr && be->chr->label ? be->chr->label : ""); |
| visit_type_str(v, name, &p, errp); |
| g_free(p); |
| } |
| |
| static void set_chr(Object *obj, Visitor *v, const char *name, void *opaque, |
| Error **errp) |
| { |
| DeviceState *dev = DEVICE(obj); |
| Property *prop = opaque; |
| CharBackend *be = qdev_get_prop_ptr(dev, prop); |
| Chardev *s; |
| char *str; |
| |
| if (dev->realized) { |
| qdev_prop_set_after_realize(dev, name, errp); |
| return; |
| } |
| |
| if (!visit_type_str(v, name, &str, errp)) { |
| return; |
| } |
| |
| /* |
| * TODO Should this really be an error? If no, the old value |
| * needs to be released before we store the new one. |
| */ |
| if (!check_prop_still_unset(dev, name, be->chr, str, errp)) { |
| return; |
| } |
| |
| if (!*str) { |
| g_free(str); |
| be->chr = NULL; |
| return; |
| } |
| |
| s = qemu_chr_find(str); |
| if (s == NULL) { |
| error_setg(errp, "Property '%s.%s' can't find value '%s'", |
| object_get_typename(obj), prop->name, str); |
| } else if (!qemu_chr_fe_init(be, s, errp)) { |
| error_prepend(errp, "Property '%s.%s' can't take value '%s': ", |
| object_get_typename(obj), prop->name, str); |
| } |
| g_free(str); |
| } |
| |
| static void release_chr(Object *obj, const char *name, void *opaque) |
| { |
| DeviceState *dev = DEVICE(obj); |
| Property *prop = opaque; |
| CharBackend *be = qdev_get_prop_ptr(dev, prop); |
| |
| qemu_chr_fe_deinit(be, false); |
| } |
| |
| const 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, const char *name, |
| void *opaque, 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, name, &p, errp); |
| g_free(p); |
| } |
| |
| static void set_netdev(Object *obj, Visitor *v, const char *name, |
| void *opaque, 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]; |
| int queues, err = 0, i = 0; |
| char *str; |
| |
| if (dev->realized) { |
| qdev_prop_set_after_realize(dev, name, errp); |
| return; |
| } |
| |
| if (!visit_type_str(v, name, &str, errp)) { |
| return; |
| } |
| |
| queues = qemu_find_net_clients_except(str, peers, |
| NET_CLIENT_DRIVER_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]->peer) { |
| err = -EEXIST; |
| goto out; |
| } |
| |
| /* |
| * TODO Should this really be an error? If no, the old value |
| * needs to be released before we store the new one. |
| */ |
| if (!check_prop_still_unset(dev, name, ncs[i], str, errp)) { |
| 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); |
| } |
| |
| const PropertyInfo qdev_prop_netdev = { |
| .name = "str", |
| .description = "ID of a netdev to use as a backend", |
| .get = get_netdev, |
| .set = set_netdev, |
| }; |
| |
| |
| /* --- audiodev --- */ |
| static void get_audiodev(Object *obj, Visitor *v, const char* name, |
| void *opaque, Error **errp) |
| { |
| DeviceState *dev = DEVICE(obj); |
| Property *prop = opaque; |
| QEMUSoundCard *card = qdev_get_prop_ptr(dev, prop); |
| char *p = g_strdup(audio_get_id(card)); |
| |
| visit_type_str(v, name, &p, errp); |
| g_free(p); |
| } |
| |
| static void set_audiodev(Object *obj, Visitor *v, const char* name, |
| void *opaque, Error **errp) |
| { |
| DeviceState *dev = DEVICE(obj); |
| Property *prop = opaque; |
| QEMUSoundCard *card = qdev_get_prop_ptr(dev, prop); |
| AudioState *state; |
| int err = 0; |
| char *str; |
| |
| if (dev->realized) { |
| qdev_prop_set_after_realize(dev, name, errp); |
| return; |
| } |
| |
| if (!visit_type_str(v, name, &str, errp)) { |
| return; |
| } |
| |
| state = audio_state_by_name(str); |
| |
| if (!state) { |
| err = -ENOENT; |
| goto out; |
| } |
| card->state = state; |
| |
| out: |
| error_set_from_qdev_prop_error(errp, err, dev, prop, str); |
| g_free(str); |
| } |
| |
| const PropertyInfo qdev_prop_audiodev = { |
| .name = "str", |
| .description = "ID of an audiodev to use as a backend", |
| /* release done on shutdown */ |
| .get = get_audiodev, |
| .set = set_audiodev, |
| }; |
| |
| bool qdev_prop_set_drive_err(DeviceState *dev, const char *name, |
| BlockBackend *value, Error **errp) |
| { |
| const char *ref = ""; |
| |
| if (value) { |
| ref = blk_name(value); |
| if (!*ref) { |
| const BlockDriverState *bs = blk_bs(value); |
| if (bs) { |
| ref = bdrv_get_node_name(bs); |
| } |
| } |
| } |
| |
| return object_property_set_str(OBJECT(dev), name, ref, errp); |
| } |
| |
| void qdev_prop_set_drive(DeviceState *dev, const char *name, |
| BlockBackend *value) |
| { |
| qdev_prop_set_drive_err(dev, name, value, &error_abort); |
| } |
| |
| void qdev_prop_set_chr(DeviceState *dev, const char *name, |
| Chardev *value) |
| { |
| assert(!value || value->label); |
| object_property_set_str(OBJECT(dev), name, value ? value->label : "", |
| &error_abort); |
| } |
| |
| void qdev_prop_set_netdev(DeviceState *dev, const char *name, |
| NetClientState *value) |
| { |
| assert(!value || value->name); |
| object_property_set_str(OBJECT(dev), name, value ? value->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; |
| } |
