[libvirt] [PATCH] nodedev: Return the parent for a virNodeDevicePtr struct

[John Ferlan]

ping - no ACK on the only comment...

Tks -

John

On 02/08/2017 05:03 PM, John Ferlan wrote:
> When the 'parent' was added to the virNodeDevicePtr structure
> by commit id 'e8a4ea75a' the 'parent' field was not properly filled
> in when a virGetNodeDevice call was made within driver/config code.
> Only the device name was ever filled in. Fetching the parent required
> a second trip via virNodeDeviceGetParent into the node device lookup
> code was required in order to retrieve the specific parent field (and
> still the parent field was never filled in although it was free'd).
> 
> Since we have the data when we initially call virGetNodeDevice from
> within driver/node_config code - let's just fill in the parent field
> as well for anyone that wants it without requiring another trip into
> the node_device lookup just to get the parent.
> 
> This will allow API's such as virConnectListAllNodeDevices,
> virNodeDeviceLookupByName, and virNodeDeviceLookupSCSIHostByWWN
> to retrieve both name and parent in the returned virNodeDevicePtr.
> 
> Signed-off-by: John Ferlan <jferlan at redhat.com>
> ---
> 
>  Found this while working on some vHBA in the domain code when I was
>  thinking about using a virConnectListAllNodeDevices... The returned
>  structures didn't have the ->parent filled in... 
> 
>  src/conf/node_device_conf.c          |  4 ++--
>  src/node_device/node_device_driver.c | 10 ++++++++--
>  src/test/test_driver.c               |  6 +++++-
>  3 files changed, 15 insertions(+), 5 deletions(-)
> 
> diff --git a/src/conf/node_device_conf.c b/src/conf/node_device_conf.c
> index 4d3268f..f6d7692 100644
> --- a/src/conf/node_device_conf.c
> +++ b/src/conf/node_device_conf.c
> @@ -2158,8 +2158,8 @@ virNodeDeviceObjListExport(virConnectPtr conn,
>          if ((!filter || filter(conn, devobj->def)) &&
>              virNodeDeviceMatch(devobj, flags)) {
>              if (devices) {
> -                if (!(device = virGetNodeDevice(conn,
> -                                                devobj->def->name))) {
> +                if (!(device = virGetNodeDevice(conn, devobj->def->name)) ||
> +                    VIR_STRDUP(device->parent, devobj->def->parent) < 0) {
>                      virNodeDeviceObjUnlock(devobj);
>                      goto cleanup;
>                  }
> diff --git a/src/node_device/node_device_driver.c b/src/node_device/node_device_driver.c
> index 5238e23..4900e32 100644
> --- a/src/node_device/node_device_driver.c
> +++ b/src/node_device/node_device_driver.c
> @@ -261,7 +261,10 @@ nodeDeviceLookupByName(virConnectPtr conn, const char *name)
>      if (virNodeDeviceLookupByNameEnsureACL(conn, obj->def) < 0)
>          goto cleanup;
>  
> -    ret = virGetNodeDevice(conn, name);
> +    if ((ret = virGetNodeDevice(conn, name))) {
> +        if (VIR_STRDUP(ret->parent, obj->def->parent) < 0)
> +            virObjectUnref(ret);
> +    }
>  
>   cleanup:
>      if (obj)
> @@ -302,7 +305,10 @@ nodeDeviceLookupSCSIHostByWWN(virConnectPtr conn,
>                          if (virNodeDeviceLookupSCSIHostByWWNEnsureACL(conn, obj->def) < 0)
>                              goto out;
>  
> -                        dev = virGetNodeDevice(conn, obj->def->name);
> +                        if ((dev = virGetNodeDevice(conn, obj->def->name))) {
> +                            if (VIR_STRDUP(dev->parent, obj->def->parent) < 0)
> +                                virObjectUnref(dev);
> +                        }
>                          virNodeDeviceObjUnlock(obj);
>                          goto out;
>                      }
> diff --git a/src/test/test_driver.c b/src/test/test_driver.c
> index 6820298..8dd738b 100644
> --- a/src/test/test_driver.c
> +++ b/src/test/test_driver.c
> @@ -5450,7 +5450,10 @@ testNodeDeviceLookupByName(virConnectPtr conn, const char *name)
>          goto cleanup;
>      }
>  
> -    ret = virGetNodeDevice(conn, name);
> +    if ((ret = virGetNodeDevice(conn, name))) {
> +        if (VIR_STRDUP(ret->parent, obj->def->parent) < 0)
> +            virObjectUnref(ret);
> +    }
>  
>   cleanup:
>      if (obj)
> @@ -5648,6 +5651,7 @@ testNodeDeviceCreateXML(virConnectPtr conn,
>                                             0);
>  
>      dev = virGetNodeDevice(conn, def->name);
> +    ignore_value(VIR_STRDUP(def->parent, def->parent));
>      def = NULL;
>   cleanup:
>      testDriverUnlock(driver);
>