The udev driver can be implemented using global state instead
of the connect private data.
---
src/interface/interface_backend_udev.c | 103 +++++++++++++++++++--------------
1 file changed, 58 insertions(+), 45 deletions(-)
diff --git a/src/interface/interface_backend_udev.c b/src/interface/interface_backend_udev.c
index d4f8c0f..b027de0 100644
--- a/src/interface/interface_backend_udev.c
+++ b/src/interface/interface_backend_udev.c
@@ -48,6 +48,8 @@ typedef enum {
VIR_UDEV_IFACE_ALL
} virUdevStatus;
+static struct udev_iface_driver *driver;
+
static virInterfaceDef *udevGetIfaceDef(struct udev *udev, const char *name);
static const char *
@@ -134,48 +136,21 @@ udevGetDevices(struct udev *udev, virUdevStatus status)
}
static virDrvOpenStatus
-udevInterfaceOpen(virConnectPtr conn,
+udevInterfaceOpen(virConnectPtr conn ATTRIBUTE_UNUSED,
virConnectAuthPtr auth ATTRIBUTE_UNUSED,
unsigned int flags)
{
- struct udev_iface_driver *driverState = NULL;
-
virCheckFlags(VIR_CONNECT_RO, VIR_DRV_OPEN_ERROR);
- if (VIR_ALLOC(driverState) < 0)
- goto cleanup;
-
- driverState->udev = udev_new();
- if (!driverState->udev) {
- virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
- _("failed to create udev context"));
- goto cleanup;
- }
-
- conn->interfacePrivateData = driverState;
+ if (!driver)
+ return VIR_DRV_OPEN_ERROR;
return VIR_DRV_OPEN_SUCCESS;
-
- cleanup:
- VIR_FREE(driverState);
-
- return VIR_DRV_OPEN_ERROR;
}
static int
-udevInterfaceClose(virConnectPtr conn)
+udevInterfaceClose(virConnectPtr conn ATTRIBUTE_UNUSED)
{
- struct udev_iface_driver *driverState;
-
- if (conn->interfacePrivateData != NULL) {
- driverState = conn->interfacePrivateData;
-
- udev_unref(driverState->udev);
-
- VIR_FREE(driverState);
- }
-
- conn->interfacePrivateData = NULL;
return 0;
}
@@ -183,8 +158,7 @@ static int
udevNumOfInterfacesByStatus(virConnectPtr conn, virUdevStatus status,
virInterfaceObjListFilter filter)
{
- struct udev_iface_driver *driverState = conn->interfacePrivateData;
- struct udev *udev = udev_ref(driverState->udev);
+ struct udev *udev = udev_ref(driver->udev);
struct udev_enumerate *enumerate = NULL;
struct udev_list_entry *devices;
struct udev_list_entry *dev_entry;
@@ -237,8 +211,7 @@ udevListInterfacesByStatus(virConnectPtr conn,
virUdevStatus status,
virInterfaceObjListFilter filter)
{
- struct udev_iface_driver *driverState = conn->interfacePrivateData;
- struct udev *udev = udev_ref(driverState->udev);
+ struct udev *udev = udev_ref(driver->udev);
struct udev_enumerate *enumerate = NULL;
struct udev_list_entry *devices;
struct udev_list_entry *dev_entry;
@@ -353,7 +326,6 @@ udevConnectListAllInterfaces(virConnectPtr conn,
virInterfacePtr **ifaces,
unsigned int flags)
{
- struct udev_iface_driver *driverState = conn->interfacePrivateData;
struct udev *udev;
struct udev_enumerate *enumerate = NULL;
struct udev_list_entry *devices;
@@ -371,7 +343,7 @@ udevConnectListAllInterfaces(virConnectPtr conn,
return -1;
/* Grab a udev reference */
- udev = udev_ref(driverState->udev);
+ udev = udev_ref(driver->udev);
/* List all interfaces in case we support more filter flags in the future */
enumerate = udevGetDevices(udev, VIR_UDEV_IFACE_ALL);
@@ -483,8 +455,7 @@ udevConnectListAllInterfaces(virConnectPtr conn,
static virInterfacePtr
udevInterfaceLookupByName(virConnectPtr conn, const char *name)
{
- struct udev_iface_driver *driverState = conn->interfacePrivateData;
- struct udev *udev = udev_ref(driverState->udev);
+ struct udev *udev = udev_ref(driver->udev);
struct udev_device *dev;
virInterfacePtr ret = NULL;
virInterfaceDefPtr def = NULL;
@@ -517,8 +488,7 @@ udevInterfaceLookupByName(virConnectPtr conn, const char *name)
static virInterfacePtr
udevInterfaceLookupByMACString(virConnectPtr conn, const char *macstr)
{
- struct udev_iface_driver *driverState = conn->interfacePrivateData;
- struct udev *udev = udev_ref(driverState->udev);
+ struct udev *udev = udev_ref(driver->udev);
struct udev_enumerate *enumerate = NULL;
struct udev_list_entry *dev_entry;
struct udev_device *dev;
@@ -1141,8 +1111,7 @@ static char *
udevInterfaceGetXMLDesc(virInterfacePtr ifinfo,
unsigned int flags)
{
- struct udev_iface_driver *driverState = ifinfo->conn->interfacePrivateData;
- struct udev *udev = udev_ref(driverState->udev);
+ struct udev *udev = udev_ref(driver->udev);
virInterfaceDef *ifacedef;
char *xmlstr = NULL;
@@ -1173,8 +1142,7 @@ udevInterfaceGetXMLDesc(virInterfacePtr ifinfo,
static int
udevInterfaceIsActive(virInterfacePtr ifinfo)
{
- struct udev_iface_driver *driverState = ifinfo->conn->interfacePrivateData;
- struct udev *udev = udev_ref(driverState->udev);
+ struct udev *udev = udev_ref(driver->udev);
struct udev_device *dev;
virInterfaceDefPtr def = NULL;
int status = -1;
@@ -1206,6 +1174,43 @@ udevInterfaceIsActive(virInterfacePtr ifinfo)
return status;
}
+
+static int
+udevStateInitialize(bool privileged ATTRIBUTE_UNUSED,
+ virStateInhibitCallback callback ATTRIBUTE_UNUSED,
+ void *opaque ATTRIBUTE_UNUSED)
+{
+ int ret = -1;
+
+ if (VIR_ALLOC(driver) < 0)
+ goto cleanup;
+
+ driver->udev = udev_new();
+ if (!driver->udev) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("failed to create udev context"));
+ goto cleanup;
+ }
+
+ ret = 0;
+
+ cleanup:
+ return ret;
+}
+
+static int
+udevStateCleanup(void)
+{
+ if (!driver)
+ return -1;
+
+ udev_unref(driver->udev);
+
+ VIR_FREE(driver);
+ return 0;
+}
+
+
static virInterfaceDriver udevIfaceDriver = {
"udev",
.interfaceOpen = udevInterfaceOpen, /* 1.0.0 */
@@ -1221,6 +1226,12 @@ static virInterfaceDriver udevIfaceDriver = {
.interfaceGetXMLDesc = udevInterfaceGetXMLDesc, /* 1.0.0 */
};
+static virStateDriver interfaceStateDriver = {
+ .name = "udev",
+ .stateInitialize = udevStateInitialize,
+ .stateCleanup = udevStateCleanup,
+};
+
int
udevIfaceRegister(void)
{
@@ -1229,5 +1240,7 @@ udevIfaceRegister(void)
_("failed to register udev interface driver"));
return -1;
}
+ if (virRegisterStateDriver(&interfaceStateDriver) < 0)
+ return -1;
return 0;
}
--
2.1.0
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