On Mon, Jan 08, 2018 at 07:35:22PM +0800, Wu Zongyong wrote: > 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@xxxxxxxxxx> > --- > > v2: > - fix mistakes pointed out by Erik > > src/node_device/node_device_linux_sysfs.c | 21 +++++++++++++++++++++ > src/node_device/node_device_udev.c | 29 +++++++++++++++++++++++++++++ > src/node_device/node_device_udev.h | 18 +++++++++++++----- > 3 files changed, 63 insertions(+), 5 deletions(-) > > diff --git a/src/node_device/node_device_linux_sysfs.c b/src/node_device/node_device_linux_sysfs.c > index 6f438e5..8b00aff 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 +176,24 @@ 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; You also need to clear the VIR_NODE_DEV_CAP_FLAG_PCI_MDEV flag, otherwise the device: 1) is still listed as mdev_types capable using virsh nodedev-list --cap mdev_types 2) formats an empty mdev_types element > + > + if (udevPCISysfsGetMdevTypesCap(sysfsPath, pci_dev) < 0) > + return -1; > + > + return 0; > +} Still leaking memory, because you didn't drop the old way of querying the capabilities - there's udevPCIGetMdevTypesCap() at the end of udevProcessPCI that has to be dropped. > + > > /* nodeDeviceSysfsGetPCIRelatedCaps() get info that is stored in sysfs > * about devices related to this device, i.e. things that can change > @@ -190,6 +209,8 @@ 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..781facf 100644 > --- a/src/node_device/node_device_udev.c > +++ b/src/node_device/node_device_udev.c > @@ -506,6 +506,35 @@ udevPCIGetMdevTypesCap(struct udev_device *device, > } > > > +int > +udevPCISysfsGetMdevTypesCap(const char *sysfsPath, > + virNodeDevCapPCIDevPtr pci_dev) > +{ > + int ret = -1; > + udevEventDataPtr priv = NULL; initialize @priv ^here... > + struct udev *udev = NULL; > + struct udev_device *device = NULL; > + > + priv = driver->privateData; rather than ^here... you're missing virObjectLock(priv) here... > + udev = udev_monitor_get_udev(priv->udev_monitor); > + device = udev_device_new_from_syspath(udev, sysfsPath); ...and virObjectUnlock(priv) here... > + 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) > diff --git a/src/node_device/node_device_udev.h b/src/node_device/node_device_udev.h > index f15e520..bbdc70f 100644 > --- a/src/node_device/node_device_udev.h > +++ b/src/node_device/node_device_udev.h > @@ -19,10 +19,18 @@ > * > * Author: Dave Allan <dallan@xxxxxxxxxx> > */ > +#ifndef __VIR_NODE_DEVICE_UDEV_H__ > +# define __VIR_NODE_DEVICE_UDEV_H__ > > -#include <libudev.h> > -#include <stdint.h> > +# include <libudev.h> > +# include <stdint.h> > > -#define SYSFS_DATA_SIZE 4096 > -#define DMI_DEVPATH "/sys/devices/virtual/dmi/id" > -#define DMI_DEVPATH_FALLBACK "/sys/class/dmi/id" > +# define SYSFS_DATA_SIZE 4096 > +# 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__ */ > -- Now that I'm looking at this hunk, would you mind splitting the patch in 2 and move this include guard-related change into a separate patch? Thanks, Erik -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list