The only way object_property_add() can fail is when a property with the same name already exists. Since our property names are all hardcoded, failure is a programming error, and the appropriate way to handle it is passing &error_abort. Same for its variants, except for object_property_add_child(), which additionally fails when the child already has a parent. Parentage is also under program control, so this is a programming error, too. We have a bit over 500 callers. Almost half of them pass &error_abort, slightly fewer ignore errors, one test case handles errors, and the remaining few callers pass them to their own callers. The previous few commits demonstrated once again that ignoring programming errors is a bad idea. Of the few ones that pass on errors, several violate the Error API. The Error ** argument must be NULL, &error_abort, &error_fatal, or a pointer to a variable containing NULL. Passing an argument of the latter kind twice without clearing it in between is wrong: if the first call sets an error, it no longer points to NULL for the second call. ich9_pm_add_properties(), sparc32_ledma_realize(), sparc32_dma_realize(), xilinx_axidma_realize(), xilinx_enet_realize() are wrong that way. When the one appropriate choice of argument is &error_abort, letting users pick the argument is a bad idea. Drop parameter @errp and assert the preconditions instead. There's one exception to "duplicate property name is a programming error": the way object_property_add() implements the magic (and undocumented) "automatic arrayification". Don't drop @errp there. Instead, rename object_property_add() to object_property_try_add(), and add the obvious wrapper object_property_add(). Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <20200505152926.18877-15-armbru@redhat.com> [Two semantic rebase conflicts resolved]
407 lines
12 KiB
C
407 lines
12 KiB
C
/*
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* ide bus support for qdev.
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*
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* Copyright (c) 2009 Gerd Hoffmann <kraxel@redhat.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu/osdep.h"
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#include "sysemu/dma.h"
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#include "qapi/error.h"
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#include "qapi/qapi-types-block.h"
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#include "qemu/error-report.h"
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#include "qemu/main-loop.h"
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#include "qemu/module.h"
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#include "hw/ide/internal.h"
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#include "hw/qdev-properties.h"
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#include "sysemu/block-backend.h"
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#include "sysemu/blockdev.h"
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#include "hw/block/block.h"
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#include "sysemu/sysemu.h"
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#include "sysemu/runstate.h"
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#include "qapi/visitor.h"
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/* --------------------------------- */
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static char *idebus_get_fw_dev_path(DeviceState *dev);
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static void idebus_unrealize(BusState *qdev, Error **errp);
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static Property ide_props[] = {
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DEFINE_PROP_UINT32("unit", IDEDevice, unit, -1),
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DEFINE_PROP_END_OF_LIST(),
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};
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static void ide_bus_class_init(ObjectClass *klass, void *data)
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{
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BusClass *k = BUS_CLASS(klass);
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k->get_fw_dev_path = idebus_get_fw_dev_path;
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k->unrealize = idebus_unrealize;
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}
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static void idebus_unrealize(BusState *bus, Error **errp)
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{
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IDEBus *ibus = IDE_BUS(bus);
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if (ibus->vmstate) {
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qemu_del_vm_change_state_handler(ibus->vmstate);
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}
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}
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static const TypeInfo ide_bus_info = {
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.name = TYPE_IDE_BUS,
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.parent = TYPE_BUS,
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.instance_size = sizeof(IDEBus),
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.class_init = ide_bus_class_init,
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};
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void ide_bus_new(IDEBus *idebus, size_t idebus_size, DeviceState *dev,
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int bus_id, int max_units)
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{
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qbus_create_inplace(idebus, idebus_size, TYPE_IDE_BUS, dev, NULL);
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idebus->bus_id = bus_id;
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idebus->max_units = max_units;
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}
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static char *idebus_get_fw_dev_path(DeviceState *dev)
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{
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char path[30];
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snprintf(path, sizeof(path), "%s@%x", qdev_fw_name(dev),
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((IDEBus*)dev->parent_bus)->bus_id);
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return g_strdup(path);
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}
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static void ide_qdev_realize(DeviceState *qdev, Error **errp)
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{
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IDEDevice *dev = IDE_DEVICE(qdev);
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IDEDeviceClass *dc = IDE_DEVICE_GET_CLASS(dev);
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IDEBus *bus = DO_UPCAST(IDEBus, qbus, qdev->parent_bus);
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if (dev->unit == -1) {
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dev->unit = bus->master ? 1 : 0;
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}
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if (dev->unit >= bus->max_units) {
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error_setg(errp, "Can't create IDE unit %d, bus supports only %d units",
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dev->unit, bus->max_units);
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return;
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}
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switch (dev->unit) {
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case 0:
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if (bus->master) {
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error_setg(errp, "IDE unit %d is in use", dev->unit);
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return;
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}
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bus->master = dev;
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break;
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case 1:
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if (bus->slave) {
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error_setg(errp, "IDE unit %d is in use", dev->unit);
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return;
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}
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bus->slave = dev;
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break;
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default:
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error_setg(errp, "Invalid IDE unit %d", dev->unit);
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return;
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}
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dc->realize(dev, errp);
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}
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IDEDevice *ide_create_drive(IDEBus *bus, int unit, DriveInfo *drive)
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{
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DeviceState *dev;
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dev = qdev_create(&bus->qbus, drive->media_cd ? "ide-cd" : "ide-hd");
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qdev_prop_set_uint32(dev, "unit", unit);
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qdev_prop_set_drive(dev, "drive", blk_by_legacy_dinfo(drive),
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&error_fatal);
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qdev_init_nofail(dev);
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return DO_UPCAST(IDEDevice, qdev, dev);
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}
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int ide_get_geometry(BusState *bus, int unit,
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int16_t *cyls, int8_t *heads, int8_t *secs)
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{
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IDEState *s = &DO_UPCAST(IDEBus, qbus, bus)->ifs[unit];
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if (s->drive_kind != IDE_HD || !s->blk) {
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return -1;
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}
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*cyls = s->cylinders;
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*heads = s->heads;
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*secs = s->sectors;
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return 0;
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}
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int ide_get_bios_chs_trans(BusState *bus, int unit)
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{
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return DO_UPCAST(IDEBus, qbus, bus)->ifs[unit].chs_trans;
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}
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/* --------------------------------- */
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typedef struct IDEDrive {
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IDEDevice dev;
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} IDEDrive;
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static void ide_dev_initfn(IDEDevice *dev, IDEDriveKind kind, Error **errp)
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{
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IDEBus *bus = DO_UPCAST(IDEBus, qbus, dev->qdev.parent_bus);
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IDEState *s = bus->ifs + dev->unit;
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int ret;
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if (!dev->conf.blk) {
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if (kind != IDE_CD) {
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error_setg(errp, "No drive specified");
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return;
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} else {
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/* Anonymous BlockBackend for an empty drive */
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dev->conf.blk = blk_new(qemu_get_aio_context(), 0, BLK_PERM_ALL);
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ret = blk_attach_dev(dev->conf.blk, &dev->qdev);
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assert(ret == 0);
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}
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}
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if (dev->conf.discard_granularity == -1) {
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dev->conf.discard_granularity = 512;
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} else if (dev->conf.discard_granularity &&
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dev->conf.discard_granularity != 512) {
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error_setg(errp, "discard_granularity must be 512 for ide");
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return;
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}
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blkconf_blocksizes(&dev->conf);
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if (dev->conf.logical_block_size != 512) {
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error_setg(errp, "logical_block_size must be 512 for IDE");
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return;
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}
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if (kind != IDE_CD) {
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if (!blkconf_geometry(&dev->conf, &dev->chs_trans, 65535, 16, 255,
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errp)) {
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return;
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}
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}
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if (!blkconf_apply_backend_options(&dev->conf, kind == IDE_CD,
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kind != IDE_CD, errp)) {
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return;
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}
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if (ide_init_drive(s, dev->conf.blk, kind,
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dev->version, dev->serial, dev->model, dev->wwn,
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dev->conf.cyls, dev->conf.heads, dev->conf.secs,
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dev->chs_trans, errp) < 0) {
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return;
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}
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if (!dev->version) {
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dev->version = g_strdup(s->version);
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}
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if (!dev->serial) {
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dev->serial = g_strdup(s->drive_serial_str);
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}
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add_boot_device_path(dev->conf.bootindex, &dev->qdev,
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dev->unit ? "/disk@1" : "/disk@0");
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add_boot_device_lchs(&dev->qdev, dev->unit ? "/disk@1" : "/disk@0",
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dev->conf.lcyls,
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dev->conf.lheads,
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dev->conf.lsecs);
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}
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static void ide_dev_get_bootindex(Object *obj, Visitor *v, const char *name,
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void *opaque, Error **errp)
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{
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IDEDevice *d = IDE_DEVICE(obj);
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visit_type_int32(v, name, &d->conf.bootindex, errp);
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}
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static void ide_dev_set_bootindex(Object *obj, Visitor *v, const char *name,
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void *opaque, Error **errp)
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{
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IDEDevice *d = IDE_DEVICE(obj);
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int32_t boot_index;
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Error *local_err = NULL;
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visit_type_int32(v, name, &boot_index, &local_err);
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if (local_err) {
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goto out;
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}
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/* check whether bootindex is present in fw_boot_order list */
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check_boot_index(boot_index, &local_err);
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if (local_err) {
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goto out;
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}
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/* change bootindex to a new one */
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d->conf.bootindex = boot_index;
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if (d->unit != -1) {
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add_boot_device_path(d->conf.bootindex, &d->qdev,
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d->unit ? "/disk@1" : "/disk@0");
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}
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out:
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error_propagate(errp, local_err);
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}
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static void ide_dev_instance_init(Object *obj)
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{
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object_property_add(obj, "bootindex", "int32",
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ide_dev_get_bootindex,
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ide_dev_set_bootindex, NULL, NULL);
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object_property_set_int(obj, -1, "bootindex", NULL);
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}
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static void ide_hd_realize(IDEDevice *dev, Error **errp)
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{
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ide_dev_initfn(dev, IDE_HD, errp);
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}
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static void ide_cd_realize(IDEDevice *dev, Error **errp)
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{
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ide_dev_initfn(dev, IDE_CD, errp);
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}
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static void ide_drive_realize(IDEDevice *dev, Error **errp)
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{
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DriveInfo *dinfo = NULL;
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warn_report("'ide-drive' is deprecated, "
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"please use 'ide-hd' or 'ide-cd' instead");
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if (dev->conf.blk) {
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dinfo = blk_legacy_dinfo(dev->conf.blk);
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}
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ide_dev_initfn(dev, dinfo && dinfo->media_cd ? IDE_CD : IDE_HD, errp);
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}
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#define DEFINE_IDE_DEV_PROPERTIES() \
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DEFINE_BLOCK_PROPERTIES(IDEDrive, dev.conf), \
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DEFINE_BLOCK_ERROR_PROPERTIES(IDEDrive, dev.conf), \
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DEFINE_PROP_STRING("ver", IDEDrive, dev.version), \
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DEFINE_PROP_UINT64("wwn", IDEDrive, dev.wwn, 0), \
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DEFINE_PROP_STRING("serial", IDEDrive, dev.serial),\
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DEFINE_PROP_STRING("model", IDEDrive, dev.model)
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static Property ide_hd_properties[] = {
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DEFINE_IDE_DEV_PROPERTIES(),
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DEFINE_BLOCK_CHS_PROPERTIES(IDEDrive, dev.conf),
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DEFINE_PROP_BIOS_CHS_TRANS("bios-chs-trans",
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IDEDrive, dev.chs_trans, BIOS_ATA_TRANSLATION_AUTO),
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DEFINE_PROP_UINT16("rotation_rate", IDEDrive, dev.rotation_rate, 0),
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DEFINE_PROP_END_OF_LIST(),
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};
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static void ide_hd_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(klass);
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IDEDeviceClass *k = IDE_DEVICE_CLASS(klass);
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k->realize = ide_hd_realize;
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dc->fw_name = "drive";
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dc->desc = "virtual IDE disk";
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device_class_set_props(dc, ide_hd_properties);
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}
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static const TypeInfo ide_hd_info = {
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.name = "ide-hd",
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.parent = TYPE_IDE_DEVICE,
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.instance_size = sizeof(IDEDrive),
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.class_init = ide_hd_class_init,
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};
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static Property ide_cd_properties[] = {
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DEFINE_IDE_DEV_PROPERTIES(),
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DEFINE_PROP_END_OF_LIST(),
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};
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static void ide_cd_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(klass);
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IDEDeviceClass *k = IDE_DEVICE_CLASS(klass);
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k->realize = ide_cd_realize;
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dc->fw_name = "drive";
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dc->desc = "virtual IDE CD-ROM";
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device_class_set_props(dc, ide_cd_properties);
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}
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static const TypeInfo ide_cd_info = {
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.name = "ide-cd",
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.parent = TYPE_IDE_DEVICE,
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.instance_size = sizeof(IDEDrive),
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.class_init = ide_cd_class_init,
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};
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static Property ide_drive_properties[] = {
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DEFINE_IDE_DEV_PROPERTIES(),
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DEFINE_PROP_END_OF_LIST(),
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};
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static void ide_drive_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(klass);
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IDEDeviceClass *k = IDE_DEVICE_CLASS(klass);
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k->realize = ide_drive_realize;
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dc->fw_name = "drive";
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dc->desc = "virtual IDE disk or CD-ROM (legacy)";
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device_class_set_props(dc, ide_drive_properties);
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}
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static const TypeInfo ide_drive_info = {
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.name = "ide-drive",
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.parent = TYPE_IDE_DEVICE,
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.instance_size = sizeof(IDEDrive),
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.class_init = ide_drive_class_init,
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};
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static void ide_device_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *k = DEVICE_CLASS(klass);
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k->realize = ide_qdev_realize;
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set_bit(DEVICE_CATEGORY_STORAGE, k->categories);
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k->bus_type = TYPE_IDE_BUS;
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device_class_set_props(k, ide_props);
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}
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static const TypeInfo ide_device_type_info = {
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.name = TYPE_IDE_DEVICE,
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.parent = TYPE_DEVICE,
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.instance_size = sizeof(IDEDevice),
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.abstract = true,
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.class_size = sizeof(IDEDeviceClass),
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.class_init = ide_device_class_init,
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.instance_init = ide_dev_instance_init,
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};
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static void ide_register_types(void)
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{
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type_register_static(&ide_bus_info);
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type_register_static(&ide_hd_info);
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type_register_static(&ide_cd_info);
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type_register_static(&ide_drive_info);
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type_register_static(&ide_device_type_info);
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}
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type_init(ide_register_types)
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