[libvirt] [PATCH v2 11/13] Convert virPCIDeviceList and virUSBDeviceList into virObjectLockable
Daniel P. Berrange
berrange at redhat.com
Mon Jan 21 14:48:12 UTC 2013
From: "Daniel P. Berrange" <berrange at redhat.com>
To allow modifications to the lists to be synchronized, convert
virPCIDeviceList and virUSBDeviceList into virObjectLockable
classes. The locking, however, will not be self-contained. The
users of these classes will have to call virObjectLock/Unlock
in the critical regions.
Signed-off-by: Daniel P. Berrange <berrange at redhat.com>
---
src/lxc/lxc_hostdev.c | 4 ++--
src/qemu/qemu_driver.c | 6 +++---
src/qemu/qemu_hostdev.c | 20 ++++++++++----------
src/qemu/qemu_hotplug.c | 4 ++--
src/util/virpci.c | 35 ++++++++++++++++++++++++++---------
src/util/virpci.h | 2 +-
src/util/virusb.c | 48 ++++++++++++++++++++++++++++++++----------------
src/util/virusb.h | 2 +-
8 files changed, 77 insertions(+), 44 deletions(-)
diff --git a/src/lxc/lxc_hostdev.c b/src/lxc/lxc_hostdev.c
index a627714..33b0b60 100644
--- a/src/lxc/lxc_hostdev.c
+++ b/src/lxc/lxc_hostdev.c
@@ -167,7 +167,7 @@ virLXCFindHostdevUSBDevice(virDomainHostdevDefPtr hostdev,
*usb = virUSBDeviceListGet(devs, 0);
virUSBDeviceListSteal(devs, *usb);
}
- virUSBDeviceListFree(devs);
+ virObjectUnref(devs);
if (rc == 0) {
goto out;
@@ -273,7 +273,7 @@ virLXCPrepareHostUSBDevices(virLXCDriverPtr driver,
ret = 0;
cleanup:
- virUSBDeviceListFree(list);
+ virObjectUnref(list);
return ret;
}
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index cba926d..eb4a132 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -1048,9 +1048,9 @@ qemuShutdown(void) {
qemuDriverLock(qemu_driver);
virNWFilterUnRegisterCallbackDriver(&qemuCallbackDriver);
- virPCIDeviceListFree(qemu_driver->activePciHostdevs);
- virPCIDeviceListFree(qemu_driver->inactivePciHostdevs);
- virUSBDeviceListFree(qemu_driver->activeUsbHostdevs);
+ virObjectUnref(qemu_driver->activePciHostdevs);
+ virObjectUnref(qemu_driver->inactivePciHostdevs);
+ virObjectUnref(qemu_driver->activeUsbHostdevs);
virHashFree(qemu_driver->sharedDisks);
virCapabilitiesFree(qemu_driver->caps);
qemuCapsCacheFree(qemu_driver->capsCache);
diff --git a/src/qemu/qemu_hostdev.c b/src/qemu/qemu_hostdev.c
index 46a17a7..3dfcf63 100644
--- a/src/qemu/qemu_hostdev.c
+++ b/src/qemu/qemu_hostdev.c
@@ -56,13 +56,13 @@ qemuGetPciHostDeviceList(virDomainHostdevDefPtr *hostdevs, int nhostdevs)
hostdev->source.subsys.u.pci.slot,
hostdev->source.subsys.u.pci.function);
if (!dev) {
- virPCIDeviceListFree(list);
+ virObjectUnref(list);
return NULL;
}
if (virPCIDeviceListAdd(list, dev) < 0) {
virPCIDeviceFree(dev);
- virPCIDeviceListFree(list);
+ virObjectUnref(list);
return NULL;
}
@@ -98,14 +98,14 @@ qemuGetActivePciHostDeviceList(virQEMUDriverPtr driver,
hostdev->source.subsys.u.pci.slot,
hostdev->source.subsys.u.pci.function);
if (!dev) {
- virPCIDeviceListFree(list);
+ virObjectUnref(list);
return NULL;
}
if ((activeDev = virPCIDeviceListFind(driver->activePciHostdevs, dev))) {
if (virPCIDeviceListAdd(list, activeDev) < 0) {
virPCIDeviceFree(dev);
- virPCIDeviceListFree(list);
+ virObjectUnref(list);
return NULL;
}
}
@@ -557,7 +557,7 @@ int qemuPrepareHostdevPCIDevices(virQEMUDriverPtr driver,
inactivedevs:
/* Only steal all the devices from driver->activePciHostdevs. We will
- * free them in virPCIDeviceListFree().
+ * free them in virObjectUnref().
*/
while (virPCIDeviceListCount(pcidevs) > 0) {
virPCIDevicePtr dev = virPCIDeviceListGet(pcidevs, 0);
@@ -580,7 +580,7 @@ reattachdevs:
}
cleanup:
- virPCIDeviceListFree(pcidevs);
+ virObjectUnref(pcidevs);
virObjectUnref(cfg);
return ret;
}
@@ -686,7 +686,7 @@ qemuFindHostdevUSBDevice(virDomainHostdevDefPtr hostdev,
*usb = virUSBDeviceListGet(devs, 0);
virUSBDeviceListSteal(devs, *usb);
}
- virUSBDeviceListFree(devs);
+ virObjectUnref(devs);
if (rc == 0) {
goto out;
@@ -792,7 +792,7 @@ qemuPrepareHostUSBDevices(virQEMUDriverPtr driver,
ret = 0;
cleanup:
- virUSBDeviceListFree(list);
+ virObjectUnref(list);
return ret;
}
@@ -880,7 +880,7 @@ void qemuDomainReAttachHostdevDevices(virQEMUDriverPtr driver,
continue;
}
- /* virPCIDeviceListFree() will take care of freeing the dev. */
+ /* virObjectUnref() will take care of freeing the dev. */
virPCIDeviceListSteal(driver->activePciHostdevs, dev);
}
@@ -916,7 +916,7 @@ void qemuDomainReAttachHostdevDevices(virQEMUDriverPtr driver,
qemuReattachPciDevice(dev, driver);
}
- virPCIDeviceListFree(pcidevs);
+ virObjectUnref(pcidevs);
cleanup:
virObjectUnref(cfg);
}
diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index c1305f4..bf71eba 100644
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -1197,7 +1197,7 @@ int qemuDomainAttachHostDevice(virQEMUDriverPtr driver,
goto error;
}
- virUSBDeviceListFree(list);
+ virObjectUnref(list);
return 0;
error:
@@ -1206,7 +1206,7 @@ error:
VIR_WARN("Unable to restore host device labelling on hotplug fail");
cleanup:
- virUSBDeviceListFree(list);
+ virObjectUnref(list);
if (usb)
virUSBDeviceListSteal(driver->activeUsbHostdevs, usb);
return -1;
diff --git a/src/util/virpci.c b/src/util/virpci.c
index 695f372..5044f40 100644
--- a/src/util/virpci.c
+++ b/src/util/virpci.c
@@ -74,6 +74,8 @@ struct _virPCIDevice {
};
struct _virPCIDeviceList {
+ virObjectLockable parent;
+
unsigned count;
virPCIDevicePtr *devs;
};
@@ -165,6 +167,23 @@ struct _virPCIDeviceList {
PCI_EXT_CAP_ACS_CR | \
PCI_EXT_CAP_ACS_UF)
+static virClassPtr virPCIDeviceListClass;
+
+static void virPCIDeviceListDispose(void *obj);
+
+static int virPCIOnceInit(void)
+{
+ if (!(virPCIDeviceListClass = virClassNew(virClassForObjectLockable(),
+ "virPCIDeviceList",
+ sizeof(virPCIDeviceList),
+ virPCIDeviceListDispose)))
+ return -1;
+
+ return 0;
+}
+
+VIR_ONCE_GLOBAL_INIT(virPCI)
+
static int
virPCIDeviceConfigOpen(virPCIDevicePtr dev, bool fatal)
{
@@ -1505,22 +1524,21 @@ virPCIDeviceListNew(void)
{
virPCIDeviceListPtr list;
- if (VIR_ALLOC(list) < 0) {
- virReportOOMError();
+ if (virPCIInitialize() < 0)
+ return NULL;
+
+ if (!(list = virObjectLockableNew(virPCIDeviceListClass)))
return NULL;
- }
return list;
}
-void
-virPCIDeviceListFree(virPCIDeviceListPtr list)
+static void
+virPCIDeviceListDispose(void *obj)
{
+ virPCIDeviceListPtr list = obj;
int i;
- if (!list)
- return;
-
for (i = 0; i < list->count; i++) {
virPCIDeviceFree(list->devs[i]);
list->devs[i] = NULL;
@@ -1528,7 +1546,6 @@ virPCIDeviceListFree(virPCIDeviceListPtr list)
list->count = 0;
VIR_FREE(list->devs);
- VIR_FREE(list);
}
int
diff --git a/src/util/virpci.h b/src/util/virpci.h
index 3ca7545..4eaf788 100644
--- a/src/util/virpci.h
+++ b/src/util/virpci.h
@@ -25,6 +25,7 @@
# define __VIR_PCI_H__
# include "internal.h"
+# include "virobject.h"
typedef struct _virPCIDevice virPCIDevice;
typedef virPCIDevice *virPCIDevicePtr;
@@ -78,7 +79,6 @@ void virPCIDeviceReAttachInit(virPCIDevice *dev);
virPCIDeviceListPtr virPCIDeviceListNew(void);
-void virPCIDeviceListFree(virPCIDeviceListPtr list);
int virPCIDeviceListAdd(virPCIDeviceListPtr list,
virPCIDevicePtr dev);
virPCIDevicePtr virPCIDeviceListGet(virPCIDeviceListPtr list,
diff --git a/src/util/virusb.c b/src/util/virusb.c
index 88119e4..5974602 100644
--- a/src/util/virusb.c
+++ b/src/util/virusb.c
@@ -57,6 +57,7 @@ struct _virUSBDevice {
};
struct _virUSBDeviceList {
+ virObjectLockable parent;
unsigned int count;
virUSBDevicePtr *devs;
};
@@ -67,6 +68,23 @@ typedef enum {
USB_DEVICE_FIND_BY_BUS = 1 << 1,
} virUSBDeviceFindFlags;
+static virClassPtr virUSBDeviceListClass;
+
+static void virUSBDeviceListDispose(void *obj);
+
+static int virUSBOnceInit(void)
+{
+ if (!(virUSBDeviceListClass = virClassNew(virClassForObjectLockable(),
+ "virUSBDeviceList",
+ sizeof(virUSBDeviceList),
+ virUSBDeviceListDispose)))
+ return -1;
+
+ return 0;
+}
+
+VIR_ONCE_GLOBAL_INIT(virUSB)
+
static int virUSBSysReadFile(const char *f_name, const char *d_name,
int base, unsigned int *value)
{
@@ -184,7 +202,7 @@ cleanup:
}
if (!ret)
- virUSBDeviceListFree(list);
+ virObjectUnref(list);
return ret;
}
@@ -204,7 +222,7 @@ virUSBDeviceFindByVendor(unsigned int vendor,
return -1;
if (list->count == 0) {
- virUSBDeviceListFree(list);
+ virObjectUnref(list);
if (!mandatory) {
VIR_DEBUG("Did not find USB device %x:%x",
vendor, product);
@@ -222,7 +240,7 @@ virUSBDeviceFindByVendor(unsigned int vendor,
if (devices)
*devices = list;
else
- virUSBDeviceListFree(list);
+ virObjectUnref(list);
return count;
}
@@ -242,7 +260,7 @@ virUSBDeviceFindByBus(unsigned int bus,
return -1;
if (list->count == 0) {
- virUSBDeviceListFree(list);
+ virObjectUnref(list);
if (!mandatory) {
VIR_DEBUG("Did not find USB device bus:%u device:%u",
bus, devno);
@@ -261,7 +279,7 @@ virUSBDeviceFindByBus(unsigned int bus,
*usb = virUSBDeviceListGet(list, 0);
virUSBDeviceListSteal(list, *usb);
}
- virUSBDeviceListFree(list);
+ virObjectUnref(list);
return 0;
}
@@ -283,7 +301,7 @@ virUSBDeviceFind(unsigned int vendor,
return -1;
if (list->count == 0) {
- virUSBDeviceListFree(list);
+ virObjectUnref(list);
if (!mandatory) {
VIR_DEBUG("Did not find USB device %x:%x bus:%u device:%u",
vendor, product, bus, devno);
@@ -302,7 +320,7 @@ virUSBDeviceFind(unsigned int vendor,
*usb = virUSBDeviceListGet(list, 0);
virUSBDeviceListSteal(list, *usb);
}
- virUSBDeviceListFree(list);
+ virObjectUnref(list);
return 0;
}
@@ -404,27 +422,25 @@ virUSBDeviceListNew(void)
{
virUSBDeviceListPtr list;
- if (VIR_ALLOC(list) < 0) {
- virReportOOMError();
+ if (virUSBInitialize() < 0)
+ return NULL;
+
+ if (!(list = virObjectLockableNew(virUSBDeviceListClass)))
return NULL;
- }
return list;
}
-void
-virUSBDeviceListFree(virUSBDeviceListPtr list)
+static void
+virUSBDeviceListDispose(void *obj)
{
+ virUSBDeviceListPtr list = obj;
int i;
- if (!list)
- return;
-
for (i = 0; i < list->count; i++)
virUSBDeviceFree(list->devs[i]);
VIR_FREE(list->devs);
- VIR_FREE(list);
}
int
diff --git a/src/util/virusb.h b/src/util/virusb.h
index f231a41..aa59d12 100644
--- a/src/util/virusb.h
+++ b/src/util/virusb.h
@@ -26,6 +26,7 @@
# define __VIR_USB_H__
# include "internal.h"
+# include "virobject.h"
# define USB_DEVFS "/dev/bus/usb/"
@@ -81,7 +82,6 @@ int virUSBDeviceFileIterate(virUSBDevicePtr dev,
void *opaque);
virUSBDeviceListPtr virUSBDeviceListNew(void);
-void virUSBDeviceListFree(virUSBDeviceListPtr list);
int virUSBDeviceListAdd(virUSBDeviceListPtr list,
virUSBDevicePtr dev);
virUSBDevicePtr virUSBDeviceListGet(virUSBDeviceListPtr list,
--
1.8.0.2
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