I have registered a hook at the NF_NETDEV_INGRESS, very early in the network processing path and I am doing some filtering and based on match, I want to send a notification in user space.
Since user space is listening and doesn't send data to kernel, I am planning to use nlmsg_multicast().
However is it safe to call nlmsg_multicast from the softirq context which the hook function will be executing ?
THis will also involve calling nlmsg_new(NLMSG_ALIGN(msg_size + 1), GFP_ATOMIC); in the same interrupt context.