From: Martin KaFai Lau <kafai@xxxxxx> Date: Fri, 14 May 2021 17:49:18 -0700 > On Mon, May 10, 2021 at 12:44:24PM +0900, Kuniyuki Iwashima wrote: > > As noted in the following commit, a closed listener has to hold the > > reference to the reuseport group for socket migration. This patch adds a > > field (num_closed_socks) to struct sock_reuseport to manage closed sockets > > within the same reuseport group. Moreover, this and the following commits > > introduce some helper functions to split socks[] into two sections and keep > > TCP_LISTEN and TCP_CLOSE sockets in each section. Like a double-ended > > queue, we will place TCP_LISTEN sockets from the front and TCP_CLOSE > > sockets from the end. > > > > TCP_LISTEN----------> <-------TCP_CLOSE > > +---+---+ --- +---+ --- +---+ --- +---+ > > | 0 | 1 | ... | i | ... | j | ... | k | > > +---+---+ --- +---+ --- +---+ --- +---+ > > > > i = num_socks - 1 > > j = max_socks - num_closed_socks > > k = max_socks - 1 > > > > This patch also extends reuseport_add_sock() and reuseport_grow() to > > support num_closed_socks. > Acked-by: Martin KaFai Lau <kafai@xxxxxx> Thank you!
