[libvirt] [PATCH 2/3] nodedev: update mdev_types caps before dumpxml
In current implemention, mdev_types caps keep constant all
the time. But, it is possible that a device capable of
mdev_types sometime(for example:bind to proper driver) and
incapable of mdev_types at other times(for example: unbind
from its driver).
We should keep the info of xml dumped out consistent with
real status of the device.
Signed-off-by: Wu Zongyong <cordius.wu(a)huawei.com>
---
src/node_device/node_device_linux_sysfs.c | 22 ++++++++++++++++++
src/node_device/node_device_udev.c | 37 ++++++++++++++++++++++++++-----
src/node_device/node_device_udev.h | 3 +++
3 files changed, 56 insertions(+), 6 deletions(-)
diff --git a/src/node_device/node_device_linux_sysfs.c
b/src/node_device/node_device_linux_sysfs.c
index 6f438e5..388ffb4 100644
--- a/src/node_device/node_device_linux_sysfs.c
+++ b/src/node_device/node_device_linux_sysfs.c
@@ -29,6 +29,7 @@
#include "dirname.h"
#include "node_device_driver.h"
#include "node_device_hal.h"
+#include "node_device_udev.h"
#include "node_device_linux_sysfs.h"
#include "virerror.h"
#include "viralloc.h"
@@ -175,6 +176,25 @@ nodeDeviceSysfsGetPCIIOMMUGroupCaps(virNodeDevCapPCIDevPtr pci_dev)
return ret;
}
+static int
+nodeDeviceSysfsGetPCIMdevTypesCaps(const char *sysfsPath,
+ virNodeDevCapPCIDevPtr pci_dev)
+{
+ size_t i;
+
+ /* this could be a refresh, so clear out the old data */
+ for (i = 0; i < pci_dev->nmdev_types; i++)
+ virNodeDevCapMdevTypeFree(pci_dev->mdev_types[i]);
+ VIR_FREE(pci_dev->mdev_types);
+ pci_dev->nmdev_types = 0;
+ pci_dev->flags &= ~VIR_NODE_DEV_CAP_FLAG_PCI_MDEV;
+
+ if (udevPCISysfsGetMdevTypesCap(sysfsPath, pci_dev) < 0)
+ return -1;
+
+ return 0;
+}
+
/* nodeDeviceSysfsGetPCIRelatedCaps() get info that is stored in sysfs
* about devices related to this device, i.e. things that can change
@@ -190,6 +210,8 @@ nodeDeviceSysfsGetPCIRelatedDevCaps(const char *sysfsPath,
return -1;
if (nodeDeviceSysfsGetPCIIOMMUGroupCaps(pci_dev) < 0)
return -1;
+ if (nodeDeviceSysfsGetPCIMdevTypesCaps(sysfsPath, pci_dev) < 0)
+ return -1;
return 0;
}
diff --git a/src/node_device/node_device_udev.c b/src/node_device/node_device_udev.c
index e0fca61..7b0014e 100644
--- a/src/node_device/node_device_udev.c
+++ b/src/node_device/node_device_udev.c
@@ -506,6 +506,37 @@ udevPCIGetMdevTypesCap(struct udev_device *device,
}
+int
+udevPCISysfsGetMdevTypesCap(const char *sysfsPath,
+ virNodeDevCapPCIDevPtr pci_dev)
+{
+ int ret = -1;
+ struct udev *udev = NULL;
+ struct udev_device *device = NULL;
+ udevEventDataPtr priv = driver->privateData;
+
+ virObjectLock(priv);
+ udev = udev_monitor_get_udev(priv->udev_monitor);
+ device = udev_device_new_from_syspath(udev, sysfsPath);
+ virObjectUnlock(priv);
+
+ if (!device) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("failed to create udev device from path %s"),
+ sysfsPath);
+ goto cleanup;
+ }
+
+ if (udevPCIGetMdevTypesCap(device, pci_dev) < 0)
+ goto cleanup;
+
+ ret = 0;
+ cleanup:
+ udev_device_unref(device);
+ return ret;
+}
+
+
static int
udevProcessPCI(struct udev_device *device,
virNodeDeviceDefPtr def)
@@ -597,12 +628,6 @@ udevProcessPCI(struct udev_device *device,
}
}
- /* check whether the device is mediated devices framework capable, if so,
- * process it
- */
- if (udevPCIGetMdevTypesCap(device, pci_dev) < 0)
- goto cleanup;
-
ret = 0;
cleanup:
diff --git a/src/node_device/node_device_udev.h b/src/node_device/node_device_udev.h
index 300f57e..bbdc70f 100644
--- a/src/node_device/node_device_udev.h
+++ b/src/node_device/node_device_udev.h
@@ -29,5 +29,8 @@
# define DMI_DEVPATH "/sys/devices/virtual/dmi/id"
# define DMI_DEVPATH_FALLBACK "/sys/class/dmi/id"
+int
+udevPCISysfsGetMdevTypesCap(const char *sysfsPath, virNodeDevCapPCIDevPtr pci_dev);
+
#endif /* __VIR_NODE_DEVICE_UDEV_H__ */
--
1.9.1