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;