so_snd_qfull
so->so_snd_qfull = B_FALSE;
so->so_snd_qfull = B_FALSE;
extern void so_snd_qfull(struct sonode *so);
so_snd_qfull(so);
so->so_snd_qfull = B_TRUE;
so->so_snd_qfull = B_FALSE;
if (!so->so_snd_qfull)
nso->so_snd_qfull = ssa->ssa_snd_qfull;
so_snd_qfull: 1, /* Transmit full */
((so)->so_snd_qfull || (so)->so_state & SS_FIL_SND_FLOWCTRL)