af_packet does not process data until the interface is UP. If after interface creation, but before it is UP, the host interfaces are flooded, then blocking case may occur - VPP interface will never be able to process the data.
If the EDGE_TRIGGERED flag is set, the event will not arrive, because nothing new is happening anymore (probably because the queue is already full).
Therefore, we need to use LEVEL_TRIGGERED (default value), which indicates that there is still unprocessed data (accumulated after interface creation, but before it was UP).
Type: fix
Signed-off-by: Artem Glazychev <artem.glazychev@xored.com>
Change-Id: Ied459fd194149d09f226bcb0a5907b3e327b148a
template.error_function = af_packet_fd_error;
template.file_descriptor = rx_queue->fd;
template.private_data = rx_queue->queue_index;
- template.flags = UNIX_FILE_EVENT_EDGE_TRIGGERED;
template.description =
format (0, "%U queue %u", format_af_packet_device_name,
apif->dev_instance, rx_queue->queue_id);