sndbuf_expand 1064 include/net/tcp.h u32 (*sndbuf_expand)(struct sock *sk); sndbuf_expand 1146 net/ipv4/tcp_bbr.c .sndbuf_expand = bbr_sndbuf_expand, sndbuf_expand 358 net/ipv4/tcp_input.c sndmem = ca_ops->sndbuf_expand ? ca_ops->sndbuf_expand(sk) : 2;