Function sbfree

freebsd/kern/uipc_sockbuf.c:295–339

* Adjust sockbuf state reflecting freeing of m. */

 * Adjust sockbuf state reflecting freeing of m.
 */
void
sbfree(struct sockbuf *sb, struct mbuf *m)
{

#if 0	/* XXX: not yet: soclose() call path comes here w/o lock. */
	SOCKBUF_LOCK_ASSERT(sb);
#endif

	sb->sb_ccc -= m->m_len;

	if (!(m->m_flags & M_NOTAVAIL))
		sb->sb_acc -= m->m_len;

	if (m == sb->sb_fnrdy) {
		struct mbuf *n;

		KASSERT(m->m_flags & M_NOTREADY,
		    ("%s: m %p !M_NOTREADY", __func__, m));

		n = m->m_next;
		while (n != NULL && !(n->m_flags & M_NOTREADY)) {
			n->m_flags &= ~M_BLOCKED;
			sb->sb_acc += n->m_len;
			n = n->m_next;
		}
		sb->sb_fnrdy = n;
	}

	if (m->m_type != MT_DATA && m->m_type != MT_OOBDATA)
		sb->sb_ctl -= m->m_len;

	sb->sb_mbcnt -= MSIZE;
	sb->sb_mcnt -= 1;
	if (m->m_flags & M_EXT) {
		sb->sb_mbcnt -= m->m_ext.ext_size;
		sb->sb_ccnt -= 1;
	}

	if (sb->sb_sndptr == m) {
		sb->sb_sndptr = NULL;
		sb->sb_sndptroff = 0;
	}
	if (sb->sb_sndptroff != 0)
		sb->sb_sndptroff -= m->m_len;
}

#ifdef KERN_TLS
/*