From: Thomas Falcon <tlfal...@linux.vnet.ibm.com> Date: Mon, 12 Jun 2017 12:35:04 -0500
> The IBM vNIC protocol provides support for the user to initiate > a failover from the client LPAR in case the current backing infrastructure > is deemed inadequate or in an error state. > > Support for two H_VIOCTL sub-commands for vNIC devices are required > to implement this function. These commands are H_GET_SESSION_TOKEN > and H_SESSION_ERR_DETECTED. > > "[H_GET_SESSION_TOKEN] is used to obtain a session token from a VNIC client > adapter. This token is opaque to the caller and is intended to be used in > tandem with the SESSION_ERROR_DETECTED vioctl subfunction." > > "[H_SESSION_ERR_DETECTED] is used to report that the currently active > backing device for a VNIC client adapter is behaving poorly, and that > the hypervisor should attempt to fail over to a different backing device, > if one is available." > > To provide tools access to this functionality the vNIC driver creates a > sysfs file that, when written to, will send a request to pHyp to failover > to a different backing device. > > Signed-off-by: Thomas Falcon <tlfal...@linux.vnet.ibm.com> Applied.
