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libvirt/src/conf/domain_addr.c
Andrea Bolognani 209dc615e8 conf: Implement isolation rules 
These rules will make it possible for libvirt to
automatically assign PCI addresses in a way that
respects any isolation constraints devices might
have.

Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Laine Stump <laine@laine.org>
2017-07-18 09:00:13 +02:00

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/*
* domain_addr.c: helper APIs for managing domain device addresses
*
* Copyright (C) 2006-2016 Red Hat, Inc.
* Copyright (C) 2006 Daniel P. Berrange
*
* 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 2.1 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/>.
*
* Author: Daniel P. Berrange <berrange@redhat.com>
*/
#include <config.h>
#include "viralloc.h"
#include "virlog.h"
#include "virstring.h"
#include "domain_addr.h"
#define VIR_FROM_THIS VIR_FROM_DOMAIN
VIR_LOG_INIT("conf.domain_addr");
virDomainPCIConnectFlags
virDomainPCIControllerModelToConnectType(virDomainControllerModelPCI model)
{
/* given a VIR_DOMAIN_CONTROLLER_MODEL_PCI*, return
* the equivalent VIR_PCI_CONNECT_TYPE_*.
*/
switch (model) {
case VIR_DOMAIN_CONTROLLER_MODEL_PCI_LAST:
case VIR_DOMAIN_CONTROLLER_MODEL_PCI_ROOT:
case VIR_DOMAIN_CONTROLLER_MODEL_PCIE_ROOT:
/* pci-root and pcie-root are implicit in the machine,
* and have no upstream connection, "last" will never actually
* happen, it's just there so that all possible cases are
* covered in the switch (keeps the compiler happy).
*/
return 0;
case VIR_DOMAIN_CONTROLLER_MODEL_PCI_BRIDGE:
return VIR_PCI_CONNECT_TYPE_PCI_BRIDGE;
case VIR_DOMAIN_CONTROLLER_MODEL_PCI_EXPANDER_BUS:
return VIR_PCI_CONNECT_TYPE_PCI_EXPANDER_BUS;
case VIR_DOMAIN_CONTROLLER_MODEL_PCIE_EXPANDER_BUS:
return VIR_PCI_CONNECT_TYPE_PCIE_EXPANDER_BUS;
case VIR_DOMAIN_CONTROLLER_MODEL_DMI_TO_PCI_BRIDGE:
return VIR_PCI_CONNECT_TYPE_DMI_TO_PCI_BRIDGE;
case VIR_DOMAIN_CONTROLLER_MODEL_PCIE_ROOT_PORT:
return VIR_PCI_CONNECT_TYPE_PCIE_ROOT_PORT | VIR_PCI_CONNECT_AGGREGATE_SLOT;
case VIR_DOMAIN_CONTROLLER_MODEL_PCIE_SWITCH_UPSTREAM_PORT:
return VIR_PCI_CONNECT_TYPE_PCIE_SWITCH_UPSTREAM_PORT;
case VIR_DOMAIN_CONTROLLER_MODEL_PCIE_SWITCH_DOWNSTREAM_PORT:
return VIR_PCI_CONNECT_TYPE_PCIE_SWITCH_DOWNSTREAM_PORT;
}
return 0;
}
static int
virDomainPCIControllerConnectTypeToModel(virDomainPCIConnectFlags flags)
{
if (flags & VIR_PCI_CONNECT_TYPE_PCIE_ROOT_PORT)
return VIR_DOMAIN_CONTROLLER_MODEL_PCIE_ROOT_PORT;
if (flags & VIR_PCI_CONNECT_TYPE_PCIE_SWITCH_UPSTREAM_PORT)
return VIR_DOMAIN_CONTROLLER_MODEL_PCIE_SWITCH_UPSTREAM_PORT;
if (flags & VIR_PCI_CONNECT_TYPE_PCIE_SWITCH_DOWNSTREAM_PORT)
return VIR_DOMAIN_CONTROLLER_MODEL_PCIE_SWITCH_DOWNSTREAM_PORT;
if (flags & VIR_PCI_CONNECT_TYPE_DMI_TO_PCI_BRIDGE)
return VIR_DOMAIN_CONTROLLER_MODEL_DMI_TO_PCI_BRIDGE;
if (flags & VIR_PCI_CONNECT_TYPE_PCI_EXPANDER_BUS)
return VIR_DOMAIN_CONTROLLER_MODEL_PCI_EXPANDER_BUS;
if (flags & VIR_PCI_CONNECT_TYPE_PCIE_EXPANDER_BUS)
return VIR_DOMAIN_CONTROLLER_MODEL_PCIE_EXPANDER_BUS;
if (flags & VIR_PCI_CONNECT_TYPE_PCI_BRIDGE)
return VIR_DOMAIN_CONTROLLER_MODEL_PCI_BRIDGE;
/* some connect types don't correspond to a controller model */
return -1;
}
static bool
virDomainPCIAddressFlagsCompatible(virPCIDeviceAddressPtr addr,
const char *addrStr,
virDomainPCIConnectFlags busFlags,
virDomainPCIConnectFlags devFlags,
bool reportError,
bool fromConfig)
{
virErrorNumber errType = (fromConfig
? VIR_ERR_XML_ERROR : VIR_ERR_INTERNAL_ERROR);
if (fromConfig) {
/* If the requested connection was manually specified in
* config, allow a PCI device to connect to a PCIe slot, or
* vice versa. In order to do so, we add *both* the PCI_DEVICE
* and the PCIE_DEVICE flags to the bus if it already has either
* of them, using the ENDPOINT mask.
*/
if (busFlags & VIR_PCI_CONNECT_TYPES_ENDPOINT)
busFlags |= VIR_PCI_CONNECT_TYPES_ENDPOINT;
/* Also allow manual specification of bus to override
* libvirt's assumptions about whether or not hotplug
* capability will be required.
*/
if (devFlags & VIR_PCI_CONNECT_HOTPLUGGABLE)
busFlags |= VIR_PCI_CONNECT_HOTPLUGGABLE;
/* if the device is a pci-bridge, allow manually
* assigning to any bus that would also accept a
* standard PCI device.
*/
if (devFlags & VIR_PCI_CONNECT_TYPE_PCI_BRIDGE)
devFlags |= VIR_PCI_CONNECT_TYPE_PCI_DEVICE;
}
/* If this bus doesn't allow the type of connection (PCI
* vs. PCIe) required by the device, or if the device requires
* hot-plug and this bus doesn't have it, return false.
*/
if (!(devFlags & busFlags & VIR_PCI_CONNECT_TYPES_MASK)) {
const char *connectStr;
if (!reportError)
return false;
if (devFlags & VIR_PCI_CONNECT_TYPE_PCI_DEVICE) {
connectStr = "standard PCI device";
} else if (devFlags & VIR_PCI_CONNECT_TYPE_PCIE_DEVICE) {
connectStr = "PCI Express device";
} else if (devFlags & VIR_PCI_CONNECT_TYPE_PCIE_ROOT_PORT) {
connectStr = "pcie-root-port";
} else if (devFlags & VIR_PCI_CONNECT_TYPE_PCIE_SWITCH_UPSTREAM_PORT) {
connectStr = "pci-switch-upstream-port";
} else if (devFlags & VIR_PCI_CONNECT_TYPE_PCIE_SWITCH_DOWNSTREAM_PORT) {
connectStr = "pci-switch-downstream-port";
} else if (devFlags & VIR_PCI_CONNECT_TYPE_DMI_TO_PCI_BRIDGE) {
connectStr = "dmi-to-pci-bridge";
} else if (devFlags & VIR_PCI_CONNECT_TYPE_PCI_EXPANDER_BUS) {
connectStr = "pci-expander-bus";
} else if (devFlags & VIR_PCI_CONNECT_TYPE_PCIE_EXPANDER_BUS) {
connectStr = "pcie-expander-bus";
} else if (devFlags & VIR_PCI_CONNECT_TYPE_PCI_BRIDGE) {
connectStr = "pci-bridge";
} else {
/* this should never happen. If it does, there is a
* bug in the code that sets the flag bits for devices.
*/
virReportError(errType,
_("The device at PCI address %s has "
"unrecognized connection type flags 0x%.2x"),
addrStr, devFlags & VIR_PCI_CONNECT_TYPES_MASK);
return false;
}
virReportError(errType,
_("The device at PCI address %s cannot be "
"plugged into the PCI controller with index='%d'. "
"It requires a controller that accepts a %s."),
addrStr, addr->bus, connectStr);
return false;
}
if ((devFlags & VIR_PCI_CONNECT_HOTPLUGGABLE) &&
!(busFlags & VIR_PCI_CONNECT_HOTPLUGGABLE)) {
if (reportError) {
virReportError(errType,
_("The device at PCI address %s requires "
"hotplug capability, but the PCI controller "
"with index='%d' doesn't support hotplug"),
addrStr, addr->bus);
}
return false;
}
return true;
}
/* Verify that the address is in bounds for the chosen bus, and
* that the bus is of the correct type for the device (via
* comparing the flags).
*/
bool
virDomainPCIAddressValidate(virDomainPCIAddressSetPtr addrs,
virPCIDeviceAddressPtr addr,
const char *addrStr,
virDomainPCIConnectFlags flags,
bool fromConfig)
{
virDomainPCIAddressBusPtr bus;
virErrorNumber errType = (fromConfig
? VIR_ERR_XML_ERROR : VIR_ERR_INTERNAL_ERROR);
if (addrs->nbuses == 0) {
virReportError(errType, "%s", _("No PCI buses available"));
return false;
}
if (addr->domain != 0) {
virReportError(errType,
_("Invalid PCI address %s. "
"Only PCI domain 0 is available"),
addrStr);
return false;
}
if (addr->bus >= addrs->nbuses) {
virReportError(errType,
_("Invalid PCI address %s. "
"Only PCI buses up to %zu are available"),
addrStr, addrs->nbuses - 1);
return false;
}
bus = &addrs->buses[addr->bus];
/* assure that at least one of the requested connection types is
* provided by this bus
*/
if (!virDomainPCIAddressFlagsCompatible(addr, addrStr, bus->flags,
flags, true, fromConfig))
return false;
/* some "buses" are really just a single port */
if (bus->minSlot && addr->slot < bus->minSlot) {
virReportError(errType,
_("Invalid PCI address %s. slot must be >= %zu"),
addrStr, bus->minSlot);
return false;
}
if (addr->slot > bus->maxSlot) {
virReportError(errType,
_("Invalid PCI address %s. slot must be <= %zu"),
addrStr, bus->maxSlot);
return false;
}
if (addr->function > VIR_PCI_ADDRESS_FUNCTION_LAST) {
virReportError(errType,
_("Invalid PCI address %s. function must be <= %u"),
addrStr, VIR_PCI_ADDRESS_FUNCTION_LAST);
return false;
}
return true;
}
int
virDomainPCIAddressBusSetModel(virDomainPCIAddressBusPtr bus,
virDomainControllerModelPCI model)
{
/* set flags for what can be connected *downstream* from each
* bus.
*/
switch (model) {
case VIR_DOMAIN_CONTROLLER_MODEL_PCI_ROOT:
bus->flags = (VIR_PCI_CONNECT_HOTPLUGGABLE |
VIR_PCI_CONNECT_TYPE_PCI_DEVICE |
VIR_PCI_CONNECT_TYPE_PCI_BRIDGE |
VIR_PCI_CONNECT_TYPE_PCI_EXPANDER_BUS);
bus->minSlot = 1;
bus->maxSlot = VIR_PCI_ADDRESS_SLOT_LAST;
break;
case VIR_DOMAIN_CONTROLLER_MODEL_PCI_BRIDGE:
bus->flags = (VIR_PCI_CONNECT_HOTPLUGGABLE |
VIR_PCI_CONNECT_TYPE_PCI_DEVICE |
VIR_PCI_CONNECT_TYPE_PCI_BRIDGE);
bus->minSlot = 1;
bus->maxSlot = VIR_PCI_ADDRESS_SLOT_LAST;
break;
case VIR_DOMAIN_CONTROLLER_MODEL_PCI_EXPANDER_BUS:
bus->flags = (VIR_PCI_CONNECT_HOTPLUGGABLE |
VIR_PCI_CONNECT_TYPE_PCI_DEVICE |
VIR_PCI_CONNECT_TYPE_PCI_BRIDGE);
bus->minSlot = 0;
bus->maxSlot = VIR_PCI_ADDRESS_SLOT_LAST;
break;
case VIR_DOMAIN_CONTROLLER_MODEL_PCIE_ROOT:
/* slots 1 - 31, no hotplug, PCIe endpoint device or
* pcie-root-port only, unless the address was specified in
* user config *and* the particular device being attached also
* allows it.
*/
bus->flags = (VIR_PCI_CONNECT_TYPE_PCIE_DEVICE |
VIR_PCI_CONNECT_TYPE_PCIE_ROOT_PORT |
VIR_PCI_CONNECT_TYPE_DMI_TO_PCI_BRIDGE |
VIR_PCI_CONNECT_TYPE_PCIE_EXPANDER_BUS);
bus->minSlot = 1;
bus->maxSlot = VIR_PCI_ADDRESS_SLOT_LAST;
break;
case VIR_DOMAIN_CONTROLLER_MODEL_DMI_TO_PCI_BRIDGE:
/* slots 0 - 31, standard PCI slots,
* but *not* hot-pluggable */
bus->flags = (VIR_PCI_CONNECT_TYPE_PCI_DEVICE |
VIR_PCI_CONNECT_TYPE_PCI_BRIDGE);
bus->minSlot = 0;
bus->maxSlot = VIR_PCI_ADDRESS_SLOT_LAST;
break;
case VIR_DOMAIN_CONTROLLER_MODEL_PCIE_ROOT_PORT:
case VIR_DOMAIN_CONTROLLER_MODEL_PCIE_SWITCH_DOWNSTREAM_PORT:
/* provides one slot which is pcie, can be used by endpoint
* devices and pcie-switch-upstream-ports, and is hotpluggable
*/
bus->flags = VIR_PCI_CONNECT_TYPE_PCIE_DEVICE
| VIR_PCI_CONNECT_TYPE_PCIE_SWITCH_UPSTREAM_PORT
| VIR_PCI_CONNECT_HOTPLUGGABLE;
bus->minSlot = 0;
bus->maxSlot = 0;
break;
case VIR_DOMAIN_CONTROLLER_MODEL_PCIE_SWITCH_UPSTREAM_PORT:
/* 32 slots, can only accept pcie-switch-downstrean-ports,
* no hotplug
*/
bus->flags = VIR_PCI_CONNECT_TYPE_PCIE_SWITCH_DOWNSTREAM_PORT;
bus->minSlot = 0;
bus->maxSlot = VIR_PCI_ADDRESS_SLOT_LAST;
break;
case VIR_DOMAIN_CONTROLLER_MODEL_PCIE_EXPANDER_BUS:
/* 32 slots, no hotplug, only accepts pcie-root-port or
* dmi-to-pci-bridge
*/
bus->flags = (VIR_PCI_CONNECT_TYPE_PCIE_ROOT_PORT |
VIR_PCI_CONNECT_TYPE_DMI_TO_PCI_BRIDGE);
bus->minSlot = 0;
bus->maxSlot = VIR_PCI_ADDRESS_SLOT_LAST;
break;
case VIR_DOMAIN_CONTROLLER_MODEL_PCI_LAST:
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("PCI controller model was not set correctly"));
return -1;
}
bus->model = model;
return 0;
}
bool
virDomainPCIAddressBusIsFullyReserved(virDomainPCIAddressBusPtr bus)
{
size_t i;
for (i = bus->minSlot; i <= bus->maxSlot; i++) {
if (!bus->slot[i].functions)
return false;
}
return true;
}
bool
virDomainPCIAddressBusIsEmpty(virDomainPCIAddressBusPtr bus)
{
size_t i;
for (i = bus->minSlot; i <= bus->maxSlot; i++) {
if (bus->slot[i].functions)
return false;
}
return true;
}
/* Ensure addr fits in the address set, by expanding it if needed
*
* Return value:
* -1 = OOM
* 0 = no action performed
* >0 = number of buses added
*/
static int
virDomainPCIAddressSetGrow(virDomainPCIAddressSetPtr addrs,
virPCIDeviceAddressPtr addr,
virDomainPCIConnectFlags flags)
{
int add;
size_t i;
int model;
bool needDMIToPCIBridge = false;
add = addr->bus - addrs->nbuses + 1;
if (add <= 0)
return 0;
/* remember that the flags aren't for the type of controller that
* we want to add, they are the type of *device* that we want to
* plug in, and this function must decide on the appropriate
* controller to add in order to give us a slot for that device.
*/
if (flags & VIR_PCI_CONNECT_TYPE_PCI_DEVICE) {
if (addrs->multipleRootsSupported) {
/* Use a pci-root controller to expand the guest's PCI
* topology if it supports having more than one */
model = VIR_DOMAIN_CONTROLLER_MODEL_PCI_ROOT;
} else {
model = VIR_DOMAIN_CONTROLLER_MODEL_PCI_BRIDGE;
/* if there aren't yet any buses that will accept a
* pci-bridge, and the caller is asking for one, we'll need to
* add a dmi-to-pci-bridge first.
*/
needDMIToPCIBridge = true;
for (i = 0; i < addrs->nbuses; i++) {
if (addrs->buses[i].flags & VIR_PCI_CONNECT_TYPE_PCI_BRIDGE) {
needDMIToPCIBridge = false;
break;
}
}
if (needDMIToPCIBridge && add == 1) {
/* We need to add a single pci-bridge to provide the bus
* our legacy PCI device will be plugged into; however, we
* have also determined that there isn't yet any proper
* place to connect that pci-bridge we're about to add (on
* a system with pcie-root, that "proper place" would be a
* dmi-to-pci-bridge". So, to give the pci-bridge a place
* to connect, we increase the count of buses to add,
* while also incrementing the bus number in the address
* for the device (since the pci-bridge will now be at an
* index 1 higher than the caller had anticipated).
*/
add++;
addr->bus++;
}
}
} else if (flags & VIR_PCI_CONNECT_TYPE_PCI_BRIDGE &&
addrs->buses[0].model == VIR_DOMAIN_CONTROLLER_MODEL_PCIE_ROOT) {
/* NB: if the root bus is pci-root, and we couldn't find an
* open place to connect a pci-bridge, then there is nothing
* we can do (since the only way to gain a new slot that
* accepts a pci-bridge is to add *a pci-bridge* (which is the
* reason we're here in the first place!)
*/
model = VIR_DOMAIN_CONTROLLER_MODEL_DMI_TO_PCI_BRIDGE;
} else if (flags & (VIR_PCI_CONNECT_TYPE_PCIE_DEVICE |
VIR_PCI_CONNECT_TYPE_PCIE_SWITCH_UPSTREAM_PORT)) {
model = VIR_DOMAIN_CONTROLLER_MODEL_PCIE_ROOT_PORT;
} else {
/* The types of devices that we can't auto-add a controller for:
*
* VIR_CONNECT_TYPE_DMI_TO_PCI_BRIDGE &
* VIR_PCI_CONNECT_TYPE_ROOT_PORT - these can only plug into
* pcie-root or pcie-expander-bus. By definition there is
* only 1 pcie-root, and we don't support auto-adding
* pcie-expander-bus (because it is intended for NUMA usage,
* and we can't automatically decide which numa node to
* associate it with)
*
* VIR_CONNECT_TYPE_PCIE_SWITCH_DOWNSTREAM_PORT - we ndon't
* support this, because it can only plug into an
* upstream-port, and the upstream port might need a
* root-port; supporting this extra layer needlessly
* complicates the code, and upstream/downstream ports are
* outside the scope of our "automatic-bus-expansion" model
* anyway.
*
* VIR_CONNECT_TYPE_PCI[E]_EXPANDER_BUS - these were created
* to support guest awareness of the NUMA node placement of
* devices on the host, and are also outside the scope of our
* "automatic-bus-expansion".
*
* VIR_PCI_CONNECT_TYPE_PCI_BRIDGE (when the root bus is
* pci-root) - see the comment above in the case that handles
* adding a slot for pci-bridge to a guest with pcie-root.
*
*/
int existingContModel = virDomainPCIControllerConnectTypeToModel(flags);
if (existingContModel >= 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("a PCI slot is needed to connect a PCI controller "
"model='%s', but none is available, and it "
"cannot be automatically added"),
virDomainControllerModelPCITypeToString(existingContModel));
} else {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Cannot automatically add a new PCI bus for a "
"device with connect flags %.2x"), flags);
}
return -1;
}
i = addrs->nbuses;
if (VIR_EXPAND_N(addrs->buses, addrs->nbuses, add) < 0)
return -1;
if (needDMIToPCIBridge) {
/* first of the new buses is dmi-to-pci-bridge, the
* rest are of the requested type
*/
if (virDomainPCIAddressBusSetModel(&addrs->buses[i++],
VIR_DOMAIN_CONTROLLER_MODEL_DMI_TO_PCI_BRIDGE) < 0) {
return -1;
}
}
for (; i < addrs->nbuses; i++) {
if (virDomainPCIAddressBusSetModel(&addrs->buses[i], model) < 0)
return -1;
}
return add;
}
char *
virDomainPCIAddressAsString(virPCIDeviceAddressPtr addr)
{
char *str;
ignore_value(virAsprintf(&str, "%.4x:%.2x:%.2x.%.1x",
addr->domain,
addr->bus,
addr->slot,
addr->function));
return str;
}
/*
* Check if the PCI slot is used by another device.
*/
bool
virDomainPCIAddressSlotInUse(virDomainPCIAddressSetPtr addrs,
virPCIDeviceAddressPtr addr)
{
return !!addrs->buses[addr->bus].slot[addr->slot].functions;
}
/*
* Reserve a function in a slot. If fromConfig is true, the address
* being requested came directly from the config and errors should be
* worded appropriately. If fromConfig is false, the address was
* automatically created by libvirt, so it is an internal error (not
* XML).
*/
static int ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2)
virDomainPCIAddressReserveAddrInternal(virDomainPCIAddressSetPtr addrs,
virPCIDeviceAddressPtr addr,
virDomainPCIConnectFlags flags,
unsigned int isolationGroup,
bool fromConfig)
{
int ret = -1;
char *addrStr = NULL;
virDomainPCIAddressBusPtr bus;
virErrorNumber errType = (fromConfig
? VIR_ERR_XML_ERROR : VIR_ERR_INTERNAL_ERROR);
if (!(addrStr = virDomainPCIAddressAsString(addr)))
goto cleanup;
/* Add an extra bus if necessary */
if (addrs->dryRun && virDomainPCIAddressSetGrow(addrs, addr, flags) < 0)
goto cleanup;
/* Check that the requested bus exists, is the correct type, and we
* are asking for a valid slot
*/
if (!virDomainPCIAddressValidate(addrs, addr, addrStr, flags, fromConfig))
goto cleanup;
bus = &addrs->buses[addr->bus];
if (bus->slot[addr->slot].functions & (1 << addr->function)) {
virReportError(errType,
_("Attempted double use of PCI Address %s"), addrStr);
goto cleanup;
}
/* if this is the first function to be reserved on this slot, and
* the device it's being reserved for can aggregate multiples on a
* slot, set the slot's aggregate flag.
*/
if (!bus->slot[addr->slot].functions &&
flags & VIR_PCI_CONNECT_AGGREGATE_SLOT) {
bus->slot[addr->slot].aggregate = true;
}
if (virDomainPCIAddressBusIsEmpty(bus) && !bus->isolationGroupLocked) {
/* The first device decides the isolation group for the
* entire bus */
bus->isolationGroup = isolationGroup;
VIR_DEBUG("PCI bus %.4x:%.2x assigned isolation group %u because of "
"first device %s",
addr->domain, addr->bus, isolationGroup, addrStr);
} else if (bus->isolationGroup != isolationGroup && fromConfig) {
/* If this is not the first function and its isolation group
* doesn't match the bus', then it should not be using this
* address. However, if the address comes from the user then
* we comply with the request and change the isolation group
* back to the default (because at that point isolation can't
* be guaranteed anymore) */
bus->isolationGroup = 0;
VIR_DEBUG("PCI bus %.4x:%.2x assigned isolation group %u because of "
"user assigned address %s",
addr->domain, addr->bus, isolationGroup, addrStr);
}
/* mark the requested function as reserved */
bus->slot[addr->slot].functions |= (1 << addr->function);
VIR_DEBUG("Reserving PCI address %s (aggregate='%s')", addrStr,
bus->slot[addr->slot].aggregate ? "true" : "false");
ret = 0;
cleanup:
VIR_FREE(addrStr);
return ret;
}
int
virDomainPCIAddressReserveAddr(virDomainPCIAddressSetPtr addrs,
virPCIDeviceAddressPtr addr,
virDomainPCIConnectFlags flags,
unsigned int isolationGroup)
{
return virDomainPCIAddressReserveAddrInternal(addrs, addr, flags,
isolationGroup, true);
}
int
virDomainPCIAddressEnsureAddr(virDomainPCIAddressSetPtr addrs,
virDomainDeviceInfoPtr dev,
virDomainPCIConnectFlags flags)
{
int ret = -1;
char *addrStr = NULL;
/* if flags is 0, the particular model of this device on this
* machinetype doesn't need a PCI address, so we're done.
*/
if (!flags)
return 0;
if (!(addrStr = virDomainPCIAddressAsString(&dev->addr.pci)))
goto cleanup;
if (virDeviceInfoPCIAddressPresent(dev)) {
/* We do not support hotplug multi-function PCI device now, so we should
* reserve the whole slot. The function of the PCI device must be 0.
*/
if (dev->addr.pci.function != 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Only PCI device addresses with function=0"
" are supported"));
goto cleanup;
}
if (!virDomainPCIAddressValidate(addrs, &dev->addr.pci,
addrStr, flags, true))
goto cleanup;
ret = virDomainPCIAddressReserveAddrInternal(addrs, &dev->addr.pci,
flags, dev->isolationGroup,
true);
} else {
ret = virDomainPCIAddressReserveNextAddr(addrs, dev, flags, -1);
}
cleanup:
VIR_FREE(addrStr);
return ret;
}
int
virDomainPCIAddressReleaseAddr(virDomainPCIAddressSetPtr addrs,
virPCIDeviceAddressPtr addr)
{
addrs->buses[addr->bus].slot[addr->slot].functions &= ~(1 << addr->function);
return 0;
}
virDomainPCIAddressSetPtr
virDomainPCIAddressSetAlloc(unsigned int nbuses)
{
virDomainPCIAddressSetPtr addrs;
if (VIR_ALLOC(addrs) < 0)
goto error;
if (VIR_ALLOC_N(addrs->buses, nbuses) < 0)
goto error;
addrs->nbuses = nbuses;
return addrs;
error:
virDomainPCIAddressSetFree(addrs);
return NULL;
}
void
virDomainPCIAddressSetFree(virDomainPCIAddressSetPtr addrs)
{
if (!addrs)
return;
VIR_FREE(addrs->buses);
VIR_FREE(addrs);
}
static int
virDomainPCIAddressFindUnusedFunctionOnBus(virDomainPCIAddressBusPtr bus,
virPCIDeviceAddressPtr searchAddr,
int function,
virDomainPCIConnectFlags flags,
bool *found)
{
int ret = -1;
char *addrStr = NULL;
*found = false;
if (!(addrStr = virDomainPCIAddressAsString(searchAddr)))
goto cleanup;
if (!virDomainPCIAddressFlagsCompatible(searchAddr, addrStr, bus->flags,
flags, false, false)) {
VIR_DEBUG("PCI bus %.4x:%.2x is not compatible with the device",
searchAddr->domain, searchAddr->bus);
} else {
while (searchAddr->slot <= bus->maxSlot) {
if (bus->slot[searchAddr->slot].functions == 0) {
*found = true;
break;
}
if (flags & VIR_PCI_CONNECT_AGGREGATE_SLOT &&
bus->slot[searchAddr->slot].aggregate) {
/* slot and device are okay with aggregating devices */
if ((bus->slot[searchAddr->slot].functions &
(1 << searchAddr->function)) == 0) {
*found = true;
break;
}
/* also check for *any* unused function if caller
* sent function = -1
*/
if (function == -1) {
while (searchAddr->function < 8) {
if ((bus->slot[searchAddr->slot].functions &
(1 << searchAddr->function)) == 0) {
*found = true;
break; /* out of inner while */
}
searchAddr->function++;
}
if (*found)
break; /* out of outer while */
searchAddr->function = 0; /* reset for next try */
}
}
VIR_DEBUG("PCI slot %.4x:%.2x:%.2x already in use",
searchAddr->domain, searchAddr->bus, searchAddr->slot);
searchAddr->slot++;
}
}
ret = 0;
cleanup:
VIR_FREE(addrStr);
return ret;
}
static int ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2)
virDomainPCIAddressGetNextAddr(virDomainPCIAddressSetPtr addrs,
virPCIDeviceAddressPtr next_addr,
virDomainPCIConnectFlags flags,
unsigned int isolationGroup,
int function)
{
virPCIDeviceAddress a = { 0 };
if (addrs->nbuses == 0) {
virReportError(VIR_ERR_XML_ERROR, "%s", _("No PCI buses available"));
goto error;
}
/* if the caller asks for "any function", give them function 0 */
if (function == -1)
a.function = 0;
else
a.function = function;
/* When looking for a suitable bus for the device, start by being
* very strict and ignoring all those where the isolation groups
* don't match. This ensures all devices sharing the same isolation
* group will end up on the same bus */
for (a.bus = 0; a.bus < addrs->nbuses; a.bus++) {
virDomainPCIAddressBusPtr bus = &addrs->buses[a.bus];
bool found = false;
if (bus->isolationGroup != isolationGroup)
continue;
a.slot = bus->minSlot;
if (virDomainPCIAddressFindUnusedFunctionOnBus(bus, &a, function,
flags, &found) < 0) {
goto error;
}
if (found)
goto success;
}
/* We haven't been able to find a perfectly matching bus, but we
* might still be able to make this work by altering the isolation
* group for a bus that's currently empty. So let's try that */
for (a.bus = 0; a.bus < addrs->nbuses; a.bus++) {
virDomainPCIAddressBusPtr bus = &addrs->buses[a.bus];
bool found = false;
/* We can only change the isolation group for a bus when
* plugging in the first device; moreover, some buses are
* prevented from ever changing it */
if (!virDomainPCIAddressBusIsEmpty(bus) || bus->isolationGroupLocked)
continue;
a.slot = bus->minSlot;
if (virDomainPCIAddressFindUnusedFunctionOnBus(bus, &a, function,
flags, &found) < 0) {
goto error;
}
/* The isolation group for the bus will actually be changed
* later, in virDomainPCIAddressReserveAddrInternal() */
if (found)
goto success;
}
/* There were no free slots after the last used one */
if (addrs->dryRun) {
/* a is already set to the first new bus */
if (virDomainPCIAddressSetGrow(addrs, &a, flags) < 0)
goto error;
/* this device will use the first slot of the new bus */
a.slot = addrs->buses[a.bus].minSlot;
goto success;
}
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("No more available PCI slots"));
error:
return -1;
success:
VIR_DEBUG("Found free PCI slot %.4x:%.2x:%.2x",
a.domain, a.bus, a.slot);
*next_addr = a;
return 0;
}
/**
* virDomainPCIAddressReserveNextAddr:
*
* @addrs: a set of PCI addresses.
* @dev: virDomainDeviceInfo that should get the new address.
* @flags: CONNECT_TYPE flags for the device that needs an address.
* @function: which function on the slot to mark as reserved
*
* Find the next *completely unreserved* slot with compatible
* connection @flags, mark one function of the slot as in-use
* (according to @function), then set @dev->addr.pci with this newly
* reserved address. If @function is -1, then the lowest unused
* function of the slot will be reserved (and since we only look for
* completely unused slots, that means "0").
*
* returns 0 on success, or -1 on failure.
*/
int
virDomainPCIAddressReserveNextAddr(virDomainPCIAddressSetPtr addrs,
virDomainDeviceInfoPtr dev,
virDomainPCIConnectFlags flags,
int function)
{
virPCIDeviceAddress addr;
if (virDomainPCIAddressGetNextAddr(addrs, &addr, flags,
dev->isolationGroup, function) < 0)
return -1;
if (virDomainPCIAddressReserveAddrInternal(addrs, &addr, flags,
dev->isolationGroup, false) < 0)
return -1;
if (!addrs->dryRun) {
dev->type = VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI;
dev->addr.pci = addr;
}
return 0;
}
static int
virDomainPCIAddressSetMultiIter(virDomainDefPtr def ATTRIBUTE_UNUSED,
virDomainDeviceDefPtr dev ATTRIBUTE_UNUSED,
virDomainDeviceInfoPtr info,
void *data)
{
virPCIDeviceAddressPtr testAddr = data;
virPCIDeviceAddressPtr thisAddr;
if (!info || info->type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI)
return 0;
thisAddr = &info->addr.pci;
if (thisAddr->domain == testAddr->domain &&
thisAddr->bus == testAddr->bus &&
thisAddr->slot == testAddr->slot &&
thisAddr->function == 0) {
/* only set to ON if it wasn't previously set
* (assuming that the user must have better information
* than us if they explicitly set it OFF)
*/
if (thisAddr->multi == VIR_TRISTATE_SWITCH_ABSENT)
thisAddr->multi = VIR_TRISTATE_SWITCH_ON;
return -1; /* finish early, *NOT* an error */
}
return 0;
}
static int
virDomainPCIAddressSetAllMultiIter(virDomainDefPtr def,
virDomainDeviceDefPtr dev ATTRIBUTE_UNUSED,
virDomainDeviceInfoPtr info,
void *data ATTRIBUTE_UNUSED)
{
virPCIDeviceAddressPtr testAddr;
if (!info || info->type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI)
return 0;
testAddr = &info->addr.pci;
if (testAddr->function != 0) {
ignore_value(virDomainDeviceInfoIterate(def,
virDomainPCIAddressSetMultiIter,
testAddr));
}
return 0;
}
/**
* virDomainPCIAddressSetAllMulti():
*
* @def: the domain definition whose devices may need adjusting
* @addrs: address set keeping track of all addresses in use.
*
* Look for any PCI slots that have multiple functions assigned, and
* set multi to ON in the address for the device at function 0
* (unless it has been explicitly set to OFF).
*
* No return code, since there is no possibility of failure.
*/
void
virDomainPCIAddressSetAllMulti(virDomainDefPtr def)
{
/* Use nested iterators over all the devices - the outer iterator
* scans through all the devices looking for those whose address
* has a non-0 function; when one is found, the inner iterator looks
* for the device that uses function 0 on the same slot and marks
* it as multi = ON
*/
ignore_value(virDomainDeviceInfoIterate(def,
virDomainPCIAddressSetAllMultiIter,
NULL));
}
static char*
virDomainCCWAddressAsString(virDomainDeviceCCWAddressPtr addr)
{
char *addrstr = NULL;
ignore_value(virAsprintf(&addrstr, "%x.%x.%04x",
addr->cssid,
addr->ssid,
addr->devno));
return addrstr;
}
static int
virDomainCCWAddressIncrement(virDomainDeviceCCWAddressPtr addr)
{
virDomainDeviceCCWAddress ccwaddr = *addr;
/* We are not touching subchannel sets and channel subsystems */
if (++ccwaddr.devno > VIR_DOMAIN_DEVICE_CCW_MAX_DEVNO)
return -1;
*addr = ccwaddr;
return 0;
}
int
virDomainCCWAddressAssign(virDomainDeviceInfoPtr dev,
virDomainCCWAddressSetPtr addrs,
bool autoassign)
{
int ret = -1;
char *addr = NULL;
if (dev->type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_CCW)
return 0;
if (!autoassign && dev->addr.ccw.assigned) {
if (!(addr = virDomainCCWAddressAsString(&dev->addr.ccw)))
goto cleanup;
if (virHashLookup(addrs->defined, addr)) {
virReportError(VIR_ERR_XML_ERROR,
_("The CCW devno '%s' is in use already "),
addr);
goto cleanup;
}
} else if (autoassign && !dev->addr.ccw.assigned) {
if (!(addr = virDomainCCWAddressAsString(&addrs->next)))
goto cleanup;
while (virHashLookup(addrs->defined, addr)) {
if (virDomainCCWAddressIncrement(&addrs->next) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("There are no more free CCW devnos."));
goto cleanup;
}
VIR_FREE(addr);
if (!(addr = virDomainCCWAddressAsString(&addrs->next)))
goto cleanup;
}
dev->addr.ccw = addrs->next;
dev->addr.ccw.assigned = true;
} else {
return 0;
}
if (virHashAddEntry(addrs->defined, addr, addr) < 0)
goto cleanup;
else
addr = NULL; /* memory will be freed by hash table */
ret = 0;
cleanup:
VIR_FREE(addr);
return ret;
}
int
virDomainCCWAddressAllocate(virDomainDefPtr def ATTRIBUTE_UNUSED,
virDomainDeviceDefPtr dev ATTRIBUTE_UNUSED,
virDomainDeviceInfoPtr info,
void *data)
{
return virDomainCCWAddressAssign(info, data, true);
}
int
virDomainCCWAddressValidate(virDomainDefPtr def ATTRIBUTE_UNUSED,
virDomainDeviceDefPtr dev ATTRIBUTE_UNUSED,
virDomainDeviceInfoPtr info,
void *data)
{
return virDomainCCWAddressAssign(info, data, false);
}
int
virDomainCCWAddressReleaseAddr(virDomainCCWAddressSetPtr addrs,
virDomainDeviceInfoPtr dev)
{
char *addr;
int ret;
addr = virDomainCCWAddressAsString(&(dev->addr.ccw));
if (!addr)
return -1;
if ((ret = virHashRemoveEntry(addrs->defined, addr)) == 0 &&
dev->addr.ccw.cssid == addrs->next.cssid &&
dev->addr.ccw.ssid == addrs->next.ssid &&
dev->addr.ccw.devno < addrs->next.devno) {
addrs->next.devno = dev->addr.ccw.devno;
addrs->next.assigned = false;
}
VIR_FREE(addr);
return ret;
}
void virDomainCCWAddressSetFree(virDomainCCWAddressSetPtr addrs)
{
if (!addrs)
return;
virHashFree(addrs->defined);
VIR_FREE(addrs);
}
virDomainCCWAddressSetPtr
virDomainCCWAddressSetCreate(void)
{
virDomainCCWAddressSetPtr addrs = NULL;
if (VIR_ALLOC(addrs) < 0)
goto error;
if (!(addrs->defined = virHashCreate(10, virHashValueFree)))
goto error;
/* must use cssid = 0xfe (254) for virtio-ccw devices */
addrs->next.cssid = 254;
addrs->next.ssid = 0;
addrs->next.devno = 0;
addrs->next.assigned = 0;
return addrs;
error:
virDomainCCWAddressSetFree(addrs);
return NULL;
}
#define VIR_DOMAIN_DEFAULT_VIRTIO_SERIAL_PORTS 31
/* virDomainVirtioSerialAddrSetCreate
*
* Allocates an address set for virtio serial addresses
*/
virDomainVirtioSerialAddrSetPtr
virDomainVirtioSerialAddrSetCreate(void)
{
virDomainVirtioSerialAddrSetPtr ret = NULL;
if (VIR_ALLOC(ret) < 0)
return NULL;
return ret;
}
static void
virDomainVirtioSerialControllerFree(virDomainVirtioSerialControllerPtr cont)
{
if (cont) {
virBitmapFree(cont->ports);
VIR_FREE(cont);
}
}
static ssize_t
virDomainVirtioSerialAddrPlaceController(virDomainVirtioSerialAddrSetPtr addrs,
virDomainVirtioSerialControllerPtr cont)
{
size_t i;
for (i = 0; i < addrs->ncontrollers; i++) {
if (addrs->controllers[i]->idx == cont->idx) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("virtio serial controller with index %u already exists"
" in the address set"),
cont->idx);
return -2;
}
if (addrs->controllers[i]->idx > cont->idx)
return i;
}
return -1;
}
static ssize_t
virDomainVirtioSerialAddrFindController(virDomainVirtioSerialAddrSetPtr addrs,
unsigned int idx)
{
size_t i;
for (i = 0; i < addrs->ncontrollers; i++) {
if (addrs->controllers[i]->idx == idx)
return i;
}
return -1;
}
/* virDomainVirtioSerialAddrSetAddController
*
* Adds virtio serial ports of the existing controller
* to the address set.
*/
static int
virDomainVirtioSerialAddrSetAddController(virDomainVirtioSerialAddrSetPtr addrs,
virDomainControllerDefPtr cont)
{
int ret = -1;
int ports;
virDomainVirtioSerialControllerPtr cnt = NULL;
ssize_t insertAt;
if (cont->type != VIR_DOMAIN_CONTROLLER_TYPE_VIRTIO_SERIAL)
return 0;
ports = cont->opts.vioserial.ports;
if (ports == -1)
ports = VIR_DOMAIN_DEFAULT_VIRTIO_SERIAL_PORTS;
VIR_DEBUG("Adding virtio serial controller index %u with %d"
" ports to the address set", cont->idx, ports);
if (VIR_ALLOC(cnt) < 0)
goto cleanup;
if (!(cnt->ports = virBitmapNew(ports)))
goto cleanup;
cnt->idx = cont->idx;
if ((insertAt = virDomainVirtioSerialAddrPlaceController(addrs, cnt)) < -1)
goto cleanup;
if (VIR_INSERT_ELEMENT(addrs->controllers, insertAt,
addrs->ncontrollers, cnt) < 0)
goto cleanup;
ret = 0;
cleanup:
virDomainVirtioSerialControllerFree(cnt);
return ret;
}
/* virDomainVirtioSerialAddrSetAddControllers
*
* Adds virtio serial ports of controllers present in the domain definition
* to the address set.
*/
int
virDomainVirtioSerialAddrSetAddControllers(virDomainVirtioSerialAddrSetPtr addrs,
virDomainDefPtr def)
{
size_t i;
for (i = 0; i < def->ncontrollers; i++) {
if (virDomainVirtioSerialAddrSetAddController(addrs,
def->controllers[i]) < 0)
return -1;
}
return 0;
}
void
virDomainVirtioSerialAddrSetFree(virDomainVirtioSerialAddrSetPtr addrs)
{
size_t i;
if (addrs) {
for (i = 0; i < addrs->ncontrollers; i++)
virDomainVirtioSerialControllerFree(addrs->controllers[i]);
VIR_FREE(addrs->controllers);
VIR_FREE(addrs);
}
}
/* virDomainVirtioSerialAddrSetCreateFromDomain
+ *
+ * @def: Domain def to introspect
+ *
+ * Inspect the domain definition and return an address set containing
+ * every virtio serial address we find
+ */
virDomainVirtioSerialAddrSetPtr
virDomainVirtioSerialAddrSetCreateFromDomain(virDomainDefPtr def)
{
virDomainVirtioSerialAddrSetPtr addrs = NULL;
virDomainVirtioSerialAddrSetPtr ret = NULL;
if (!(addrs = virDomainVirtioSerialAddrSetCreate()))
goto cleanup;
if (virDomainVirtioSerialAddrSetAddControllers(addrs, def) < 0)
goto cleanup;
if (virDomainDeviceInfoIterate(def, virDomainVirtioSerialAddrReserve,
addrs) < 0)
goto cleanup;
ret = addrs;
addrs = NULL;
cleanup:
virDomainVirtioSerialAddrSetFree(addrs);
return ret;
}
static int
virDomainVirtioSerialAddrSetAutoaddController(virDomainDefPtr def,
virDomainVirtioSerialAddrSetPtr addrs,
unsigned int idx)
{
int contidx;
if (virDomainDefMaybeAddController(def,
VIR_DOMAIN_CONTROLLER_TYPE_VIRTIO_SERIAL,
idx, -1) < 0)
return -1;
contidx = virDomainControllerFind(def, VIR_DOMAIN_CONTROLLER_TYPE_VIRTIO_SERIAL, idx);
if (virDomainVirtioSerialAddrSetAddController(addrs, def->controllers[contidx]) < 0)
return -1;
return 0;
}
static int
virDomainVirtioSerialAddrNext(virDomainDefPtr def,
virDomainVirtioSerialAddrSetPtr addrs,
virDomainDeviceVirtioSerialAddress *addr,
bool allowZero)
{
int ret = -1;
ssize_t port, startPort = 0;
ssize_t i;
unsigned int controller;
/* port number 0 is reserved for virtconsoles */
if (allowZero)
startPort = -1;
if (addrs->ncontrollers == 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("no virtio-serial controllers are available"));
goto cleanup;
}
for (i = 0; i < addrs->ncontrollers; i++) {
virBitmapPtr map = addrs->controllers[i]->ports;
if ((port = virBitmapNextClearBit(map, startPort)) >= 0) {
controller = addrs->controllers[i]->idx;
goto success;
}
}
if (def) {
for (i = 0; i < INT_MAX; i++) {
int idx = virDomainControllerFind(def, VIR_DOMAIN_CONTROLLER_TYPE_VIRTIO_SERIAL, i);
if (idx == -1) {
if (virDomainVirtioSerialAddrSetAutoaddController(def, addrs, i) < 0)
goto cleanup;
controller = i;
port = startPort + 1;
goto success;
}
}
}
virReportError(VIR_ERR_XML_ERROR, "%s",
_("Unable to find a free virtio-serial port"));
cleanup:
return ret;
success:
addr->bus = 0;
addr->port = port;
addr->controller = controller;
VIR_DEBUG("Found free virtio serial controller %u port %u", addr->controller,
addr->port);
ret = 0;
goto cleanup;
}
static int
virDomainVirtioSerialAddrNextFromController(virDomainVirtioSerialAddrSetPtr addrs,
virDomainDeviceVirtioSerialAddress *addr)
{
ssize_t port;
ssize_t i;
virBitmapPtr map;
i = virDomainVirtioSerialAddrFindController(addrs, addr->controller);
if (i < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("virtio-serial controller %u not available"),
addr->controller);
return -1;
}
map = addrs->controllers[i]->ports;
if ((port = virBitmapNextClearBit(map, 0)) <= 0) {
virReportError(VIR_ERR_XML_ERROR,
_("Unable to find a free port on virtio-serial controller %u"),
addr->controller);
return -1;
}
addr->bus = 0;
addr->port = port;
VIR_DEBUG("Found free virtio serial controller %u port %u", addr->controller,
addr->port);
return 0;
}
/* virDomainVirtioSerialAddrAutoAssign
*
* reserve a virtio serial address of the device (if it has one)
* or assign a virtio serial address to the device
*/
int
virDomainVirtioSerialAddrAutoAssignFromCache(virDomainDefPtr def,
virDomainVirtioSerialAddrSetPtr addrs,
virDomainDeviceInfoPtr info,
bool allowZero)
{
bool portOnly = info->type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_SERIAL;
if (info->type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_SERIAL &&
info->addr.vioserial.port)
return virDomainVirtioSerialAddrReserve(NULL, NULL, info, addrs);
else
return virDomainVirtioSerialAddrAssign(def, addrs, info, allowZero, portOnly);
}
int
virDomainVirtioSerialAddrAutoAssign(virDomainDefPtr def,
virDomainDeviceInfoPtr info,
bool allowZero)
{
virDomainVirtioSerialAddrSetPtr addrs = NULL;
int ret = -1;
if (!(addrs = virDomainVirtioSerialAddrSetCreateFromDomain(def)))
goto cleanup;
if (virDomainVirtioSerialAddrAutoAssignFromCache(def, addrs, info, allowZero) < 0)
goto cleanup;
ret = 0;
cleanup:
virDomainVirtioSerialAddrSetFree(addrs);
return ret;
}
int
virDomainVirtioSerialAddrAssign(virDomainDefPtr def,
virDomainVirtioSerialAddrSetPtr addrs,
virDomainDeviceInfoPtr info,
bool allowZero,
bool portOnly)
{
int ret = -1;
virDomainDeviceInfo nfo = { NULL };
virDomainDeviceInfoPtr ptr = allowZero ? &nfo : info;
ptr->type = VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_SERIAL;
if (portOnly) {
if (virDomainVirtioSerialAddrNextFromController(addrs,
&ptr->addr.vioserial) < 0)
goto cleanup;
} else {
if (virDomainVirtioSerialAddrNext(def, addrs, &ptr->addr.vioserial,
allowZero) < 0)
goto cleanup;
}
if (virDomainVirtioSerialAddrReserve(NULL, NULL, ptr, addrs) < 0)
goto cleanup;
ret = 0;
cleanup:
return ret;
}
/* virDomainVirtioSerialAddrIsComplete
*
* Check if the address is complete, or it needs auto-assignment
*/
bool
virDomainVirtioSerialAddrIsComplete(virDomainDeviceInfoPtr info)
{
return info->type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_SERIAL &&
info->addr.vioserial.port != 0;
}
/* virDomainVirtioSerialAddrReserve
*
* Reserve the virtio serial address of the device
*
* For use with virDomainDeviceInfoIterate,
* opaque should be the address set
*/
int
virDomainVirtioSerialAddrReserve(virDomainDefPtr def ATTRIBUTE_UNUSED,
virDomainDeviceDefPtr dev ATTRIBUTE_UNUSED,
virDomainDeviceInfoPtr info,
void *data)
{
virDomainVirtioSerialAddrSetPtr addrs = data;
char *str = NULL;
int ret = -1;
virBitmapPtr map = NULL;
bool b;
ssize_t i;
if (!virDomainVirtioSerialAddrIsComplete(info))
return 0;
VIR_DEBUG("Reserving virtio serial %u %u", info->addr.vioserial.controller,
info->addr.vioserial.port);
i = virDomainVirtioSerialAddrFindController(addrs, info->addr.vioserial.controller);
if (i < 0) {
virReportError(VIR_ERR_XML_ERROR,
_("virtio serial controller %u is missing"),
info->addr.vioserial.controller);
goto cleanup;
}
map = addrs->controllers[i]->ports;
if (virBitmapGetBit(map, info->addr.vioserial.port, &b) < 0) {
virReportError(VIR_ERR_XML_ERROR,
_("virtio serial controller %u does not have port %u"),
info->addr.vioserial.controller,
info->addr.vioserial.port);
goto cleanup;
}
if (b) {
virReportError(VIR_ERR_XML_ERROR,
_("virtio serial port %u on controller %u is already occupied"),
info->addr.vioserial.port,
info->addr.vioserial.controller);
goto cleanup;
}
ignore_value(virBitmapSetBit(map, info->addr.vioserial.port));
ret = 0;
cleanup:
VIR_FREE(str);
return ret;
}
/* virDomainVirtioSerialAddrRelease
*
* Release the virtio serial address of the device
*/
int
virDomainVirtioSerialAddrRelease(virDomainVirtioSerialAddrSetPtr addrs,
virDomainDeviceInfoPtr info)
{
virBitmapPtr map;
char *str = NULL;
int ret = -1;
ssize_t i;
if (info->type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_SERIAL ||
info->addr.vioserial.port == 0)
return 0;
VIR_DEBUG("Releasing virtio serial %u %u", info->addr.vioserial.controller,
info->addr.vioserial.port);
i = virDomainVirtioSerialAddrFindController(addrs, info->addr.vioserial.controller);
if (i < 0) {
virReportError(VIR_ERR_XML_ERROR,
_("virtio serial controller %u is missing"),
info->addr.vioserial.controller);
goto cleanup;
}
map = addrs->controllers[i]->ports;
if (virBitmapClearBit(map, info->addr.vioserial.port) < 0) {
virReportError(VIR_ERR_XML_ERROR,
_("virtio serial controller %u does not have port %u"),
info->addr.vioserial.controller,
info->addr.vioserial.port);
goto cleanup;
}
ret = 0;
cleanup:
VIR_FREE(str);
return ret;
}
bool
virDomainUSBAddressPortIsValid(unsigned int *port)
{
return port[0] != 0;
}
void
virDomainUSBAddressPortFormatBuf(virBufferPtr buf,
unsigned int *port)
{
size_t i;
for (i = 0; i < VIR_DOMAIN_DEVICE_USB_MAX_PORT_DEPTH; i++) {
if (port[i] == 0)
break;
virBufferAsprintf(buf, "%u.", port[i]);
}
virBufferTrim(buf, ".", -1);
}
char *
virDomainUSBAddressPortFormat(unsigned int *port)
{
virBuffer buf = VIR_BUFFER_INITIALIZER;
virDomainUSBAddressPortFormatBuf(&buf, port);
if (virBufferCheckError(&buf) < 0)
return NULL;
return virBufferContentAndReset(&buf);
}
virDomainUSBAddressSetPtr
virDomainUSBAddressSetCreate(void)
{
virDomainUSBAddressSetPtr addrs;
if (VIR_ALLOC(addrs) < 0)
return NULL;
return addrs;
}
static void
virDomainUSBAddressHubFree(virDomainUSBAddressHubPtr hub)
{
size_t i;
if (!hub)
return;
for (i = 0; i < hub->nports; i++)
virDomainUSBAddressHubFree(hub->ports[i]);
VIR_FREE(hub->ports);
virBitmapFree(hub->portmap);
VIR_FREE(hub);
}
void
virDomainUSBAddressSetFree(virDomainUSBAddressSetPtr addrs)
{
size_t i;
if (!addrs)
return;
for (i = 0; i < addrs->nbuses; i++)
virDomainUSBAddressHubFree(addrs->buses[i]);
VIR_FREE(addrs->buses);
VIR_FREE(addrs);
}
static size_t
virDomainUSBAddressControllerModelToPorts(virDomainControllerDefPtr cont)
{
int model = cont->model;
if (model == -1)
model = VIR_DOMAIN_CONTROLLER_MODEL_USB_PIIX3_UHCI;
switch ((virDomainControllerModelUSB) model) {
case VIR_DOMAIN_CONTROLLER_MODEL_USB_PIIX3_UHCI:
case VIR_DOMAIN_CONTROLLER_MODEL_USB_PIIX4_UHCI:
case VIR_DOMAIN_CONTROLLER_MODEL_USB_VT82C686B_UHCI:
return 2;
case VIR_DOMAIN_CONTROLLER_MODEL_USB_EHCI:
case VIR_DOMAIN_CONTROLLER_MODEL_USB_ICH9_EHCI1:
return 6;
case VIR_DOMAIN_CONTROLLER_MODEL_USB_ICH9_UHCI1:
case VIR_DOMAIN_CONTROLLER_MODEL_USB_ICH9_UHCI2:
case VIR_DOMAIN_CONTROLLER_MODEL_USB_ICH9_UHCI3:
/* These have two ports each and are used to provide USB1.1
* ports while ICH9_EHCI1 provides 6 USB2.0 ports.
* Ignore these since we will add the EHCI1 too. */
return 0;
case VIR_DOMAIN_CONTROLLER_MODEL_USB_PCI_OHCI:
return 3;
case VIR_DOMAIN_CONTROLLER_MODEL_USB_NEC_XHCI:
case VIR_DOMAIN_CONTROLLER_MODEL_USB_QEMU_XHCI:
if (cont->opts.usbopts.ports != -1)
return cont->opts.usbopts.ports;
return 4;
case VIR_DOMAIN_CONTROLLER_MODEL_USB_QUSB1:
case VIR_DOMAIN_CONTROLLER_MODEL_USB_QUSB2:
if (cont->opts.usbopts.ports != -1)
return cont->opts.usbopts.ports;
return 8;
case VIR_DOMAIN_CONTROLLER_MODEL_USB_NONE:
case VIR_DOMAIN_CONTROLLER_MODEL_USB_LAST:
break;
}
return 0;
}
static virDomainUSBAddressHubPtr
virDomainUSBAddressHubNew(size_t nports)
{
virDomainUSBAddressHubPtr hub = NULL, ret = NULL;
if (VIR_ALLOC(hub) < 0)
goto cleanup;
if (!(hub->portmap = virBitmapNew(nports)))
goto cleanup;
if (VIR_ALLOC_N(hub->ports, nports) < 0)
goto cleanup;
hub->nports = nports;
ret = hub;
hub = NULL;
cleanup:
virDomainUSBAddressHubFree(hub);
return ret;
}
static int
virDomainUSBAddressSetAddController(virDomainUSBAddressSetPtr addrs,
virDomainControllerDefPtr cont)
{
size_t nports = virDomainUSBAddressControllerModelToPorts(cont);
virDomainUSBAddressHubPtr hub = NULL;
int ret = -1;
VIR_DEBUG("Adding a USB controller model=%s with %zu ports",
virDomainControllerModelUSBTypeToString(cont->model),
nports);
/* Skip UHCI{1,2,3} companions; only add the EHCI1 */
if (nports == 0)
return 0;
if (addrs->nbuses <= cont->idx) {
if (VIR_EXPAND_N(addrs->buses, addrs->nbuses, cont->idx - addrs->nbuses + 1) < 0)
goto cleanup;
} else if (addrs->buses[cont->idx]) {
virReportError(VIR_ERR_XML_ERROR,
_("Duplicate USB controllers with index %u"),
cont->idx);
goto cleanup;
}
if (!(hub = virDomainUSBAddressHubNew(nports)))
goto cleanup;
addrs->buses[cont->idx] = hub;
hub = NULL;
ret = 0;
cleanup:
virDomainUSBAddressHubFree(hub);
return ret;
}
static ssize_t
virDomainUSBAddressGetLastIdx(virDomainDeviceInfoPtr info)
{
ssize_t i;
for (i = VIR_DOMAIN_DEVICE_USB_MAX_PORT_DEPTH - 1; i > 0; i--) {
if (info->addr.usb.port[i] != 0)
break;
}
return i;
}
/* Find the USBAddressHub structure representing the hub/controller
* that corresponds to the bus/port path specified by info.
* Returns the index of the requested port in targetIdx.
*/
static virDomainUSBAddressHubPtr
virDomainUSBAddressFindPort(virDomainUSBAddressSetPtr addrs,
virDomainDeviceInfoPtr info,
int *targetIdx,
const char *portStr)
{
virDomainUSBAddressHubPtr hub = NULL;
ssize_t i, lastIdx, targetPort;
if (info->addr.usb.bus >= addrs->nbuses ||
!addrs->buses[info->addr.usb.bus]) {
virReportError(VIR_ERR_XML_ERROR, _("Missing USB bus %u"),
info->addr.usb.bus);
return NULL;
}
hub = addrs->buses[info->addr.usb.bus];
lastIdx = virDomainUSBAddressGetLastIdx(info);
for (i = 0; i < lastIdx; i++) {
/* ports are numbered from 1 */
int portIdx = info->addr.usb.port[i] - 1;
if (hub->nports <= portIdx) {
virReportError(VIR_ERR_XML_ERROR,
_("port %u out of range in USB address bus: %u port: %s"),
info->addr.usb.port[i],
info->addr.usb.bus,
portStr);
return NULL;
}
hub = hub->ports[portIdx];
if (!hub) {
virReportError(VIR_ERR_XML_ERROR,
_("there is no hub at port %u in USB address bus: %u port: %s"),
info->addr.usb.port[i],
info->addr.usb.bus,
portStr);
return NULL;
}
}
targetPort = info->addr.usb.port[lastIdx] - 1;
if (targetPort >= virBitmapSize(hub->portmap)) {
virReportError(VIR_ERR_XML_ERROR,
_("requested USB port %s not present on USB bus %u"),
portStr, info->addr.usb.bus);
return NULL;
}
*targetIdx = targetPort;
return hub;
}
int
virDomainUSBAddressSetAddHub(virDomainUSBAddressSetPtr addrs,
virDomainHubDefPtr hub)
{
virDomainUSBAddressHubPtr targetHub = NULL, newHub = NULL;
int ret = -1;
int targetPort;
char *portStr = NULL;
if (hub->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_USB) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("Wrong address type for USB hub"));
goto cleanup;
}
if (!(portStr = virDomainUSBAddressPortFormat(hub->info.addr.usb.port)))
goto cleanup;
VIR_DEBUG("Adding a USB hub with 8 ports on bus=%u port=%s",
hub->info.addr.usb.bus, portStr);
if (!(newHub = virDomainUSBAddressHubNew(VIR_DOMAIN_USB_HUB_PORTS)))
goto cleanup;
if (!(targetHub = virDomainUSBAddressFindPort(addrs, &(hub->info), &targetPort,
portStr)))
goto cleanup;
if (targetHub->ports[targetPort]) {
virReportError(VIR_ERR_XML_ERROR,
_("Duplicate USB hub on bus %u port %s"),
hub->info.addr.usb.bus, portStr);
goto cleanup;
}
ignore_value(virBitmapSetBit(targetHub->portmap, targetPort));
targetHub->ports[targetPort] = newHub;
newHub = NULL;
ret = 0;
cleanup:
virDomainUSBAddressHubFree(newHub);
VIR_FREE(portStr);
return ret;
}
int
virDomainUSBAddressSetAddControllers(virDomainUSBAddressSetPtr addrs,
virDomainDefPtr def)
{
size_t i;
for (i = 0; i < def->ncontrollers; i++) {
virDomainControllerDefPtr cont = def->controllers[i];
if (cont->type == VIR_DOMAIN_CONTROLLER_TYPE_USB) {
if (virDomainUSBAddressSetAddController(addrs, cont) < 0)
return -1;
}
}
for (i = 0; i < def->nhubs; i++) {
virDomainHubDefPtr hub = def->hubs[i];
if (hub->type == VIR_DOMAIN_HUB_TYPE_USB &&
hub->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_USB &&
virDomainUSBAddressPortIsValid(hub->info.addr.usb.port)) {
/* USB hubs that do not yet have an USB address have to be
* dealt with later */
if (virDomainUSBAddressSetAddHub(addrs, hub) < 0)
return -1;
}
}
return 0;
}
static int
virDomainUSBAddressFindFreePort(virDomainUSBAddressHubPtr hub,
unsigned int *portpath,
unsigned int level)
{
unsigned int port;
ssize_t portIdx;
size_t i;
/* Look for free ports on the current hub */
if ((portIdx = virBitmapNextClearBit(hub->portmap, -1)) >= 0) {
port = portIdx + 1;
VIR_DEBUG("Found a free port %u at level %u", port, level);
portpath[level] = port;
return 0;
}
VIR_DEBUG("No ports found on hub %p, trying the hubs on it", hub);
if (level >= VIR_DOMAIN_DEVICE_USB_MAX_PORT_DEPTH - 1)
return -1;
/* Recursively search through the ports that contain another hub */
for (i = 0; i < hub->nports; i++) {
if (!hub->ports[i])
continue;
port = i + 1;
VIR_DEBUG("Looking at USB hub at level: %u port: %u", level, port);
if (virDomainUSBAddressFindFreePort(hub->ports[i], portpath,
level + 1) < 0)
continue;
portpath[level] = port;
return 0;
}
return -1;
}
size_t
virDomainUSBAddressCountAllPorts(virDomainDefPtr def)
{
size_t i, ret = 0;
for (i = 0; i < def->ncontrollers; i++) {
virDomainControllerDefPtr cont = def->controllers[i];
if (cont->type == VIR_DOMAIN_CONTROLLER_TYPE_USB)
ret += virDomainUSBAddressControllerModelToPorts(cont);
}
for (i = 0; i < def->nhubs; i++) {
virDomainHubDefPtr hub = def->hubs[i];
if (hub->type == VIR_DOMAIN_HUB_TYPE_USB)
ret += VIR_DOMAIN_USB_HUB_PORTS;
}
return ret;
}
/* Try to find a free port on bus @bus.
*
* Returns 0 on success
* -1 on fatal error (OOM)
* -2 if there is no bus at @bus or no free port on this bus
*/
static int
virDomainUSBAddressAssignFromBus(virDomainUSBAddressSetPtr addrs,
virDomainDeviceInfoPtr info,
size_t bus)
{
unsigned int portpath[VIR_DOMAIN_DEVICE_USB_MAX_PORT_DEPTH] = { 0 };
virDomainUSBAddressHubPtr hub = addrs->buses[bus];
char *portStr = NULL;
int ret = -1;
if (!hub)
return -2;
if (virDomainUSBAddressFindFreePort(hub, portpath, 0) < 0)
return -2;
/* we found a free port */
if (!(portStr = virDomainUSBAddressPortFormat(portpath)))
goto cleanup;
info->type = VIR_DOMAIN_DEVICE_ADDRESS_TYPE_USB;
info->addr.usb.bus = bus;
memcpy(info->addr.usb.port, portpath, sizeof(portpath));
VIR_DEBUG("Assigning USB addr bus=%u port=%s",
info->addr.usb.bus, portStr);
if (virDomainUSBAddressReserve(info, addrs) < 0)
goto cleanup;
ret = 0;
cleanup:
VIR_FREE(portStr);
return ret;
}
int
virDomainUSBAddressAssign(virDomainUSBAddressSetPtr addrs,
virDomainDeviceInfoPtr info)
{
size_t i;
int rc;
if (info->type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_USB) {
VIR_DEBUG("A USB port on bus %u was requested", info->addr.usb.bus);
if (info->addr.usb.bus >= addrs->nbuses ||
!addrs->buses[info->addr.usb.bus]) {
virReportError(VIR_ERR_XML_ERROR,
_("USB bus %u requested but no controller "
"with that index is present"), info->addr.usb.bus);
return -1;
}
rc = virDomainUSBAddressAssignFromBus(addrs, info, info->addr.usb.bus);
if (rc >= -1)
return rc;
} else {
VIR_DEBUG("Looking for a free USB port on all the buses");
for (i = 0; i < addrs->nbuses; i++) {
rc = virDomainUSBAddressAssignFromBus(addrs, info, i);
if (rc >= -1)
return rc;
}
}
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("No free USB ports"));
return -1;
}
int
virDomainUSBAddressPresent(virDomainDeviceInfoPtr info,
void *data ATTRIBUTE_UNUSED)
{
if (info->type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_USB &&
virDomainUSBAddressPortIsValid(info->addr.usb.port))
return 0;
return -1;
}
int
virDomainUSBAddressReserve(virDomainDeviceInfoPtr info,
void *data)
{
virDomainUSBAddressSetPtr addrs = data;
virDomainUSBAddressHubPtr targetHub = NULL;
char *portStr = NULL;
int ret = -1;
int targetPort;
if (info->type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_USB)
return 0;
if (!virDomainUSBAddressPortIsValid(info->addr.usb.port))
return 0;
portStr = virDomainUSBAddressPortFormat(info->addr.usb.port);
if (!portStr)
goto cleanup;
VIR_DEBUG("Reserving USB address bus=%u port=%s", info->addr.usb.bus, portStr);
if (!(targetHub = virDomainUSBAddressFindPort(addrs, info, &targetPort,
portStr)))
goto cleanup;
if (virBitmapIsBitSet(targetHub->portmap, targetPort)) {
virReportError(VIR_ERR_XML_ERROR,
_("Duplicate USB address bus %u port %s"),
info->addr.usb.bus, portStr);
goto cleanup;
}
ignore_value(virBitmapSetBit(targetHub->portmap, targetPort));
ret = 0;
cleanup:
VIR_FREE(portStr);
return ret;
}
int
virDomainUSBAddressEnsure(virDomainUSBAddressSetPtr addrs,
virDomainDeviceInfoPtr info)
{
if (info->type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE ||
(info->type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_USB &&
!virDomainUSBAddressPortIsValid(info->addr.usb.port))) {
if (virDomainUSBAddressAssign(addrs, info) < 0)
return -1;
} else if (info->type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_USB) {
if (virDomainUSBAddressReserve(info, addrs) < 0)
return -1;
}
return 0;
}
int
virDomainUSBAddressRelease(virDomainUSBAddressSetPtr addrs,
virDomainDeviceInfoPtr info)
{
virDomainUSBAddressHubPtr targetHub = NULL;
char *portStr = NULL;
int targetPort;
int ret = -1;
if (info->type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_USB ||
!virDomainUSBAddressPortIsValid(info->addr.usb.port))
return 0;
portStr = virDomainUSBAddressPortFormat(info->addr.usb.port);
VIR_DEBUG("Releasing USB addr bus=%u port=%s", info->addr.usb.bus, portStr);
if (!(targetHub = virDomainUSBAddressFindPort(addrs, info, &targetPort,
portStr)))
goto cleanup;
ignore_value(virBitmapClearBit(targetHub->portmap, targetPort));
ret = 0;
cleanup:
VIR_FREE(portStr);
return ret;
}
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