tree e820b0a5dc41d924faa604ede2b9218a41612687
parent f707926ec0a4c68010c3cfabbaf27ae4ad039b0f
author Miroslav Lichvar <mlichvar@redhat.com> 1741100017 +0100
committer Richard Cochran <richardcochran@gmail.com> 1756988350 -0700

port: Refresh link status on faults.

ptp4l gets the ENOBUFS error on the netlink socket when the kernel has
to drop messages due to full socket buffer. If ptp4l has a port in the
faulty state waiting for the link to go up and that event corresponds
to one of the dropped netlink messages, the port will be stuck in the
faulty state until the link goes down and up again.

To prevent the port from getting stuck, request the current link status
when dispatching the EV_FAULT_DETECTED event. Also, reopen the socket to
get rid of the buffered messages when handling the fault and again when
reinitializing the port.

Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>