351 		if ((caddr_t)m->m_data + m->m_len > b)  in m_sanity()
365 			pktlen += m->m_len;  in m_sanity()
519 	m->m_len = len;  in m_prepend()
545 		if (off < m->m_len)  in m_copym()
547 		off -= m->m_len;  in m_copym()
574 		n->m_len = min(len, m->m_len - off);  in m_copym()
580 			    (u_int)n->m_len);  in m_copym()
582 			len -= n->m_len;  in m_copym()
616 	n->m_len = m->m_len;  in m_copypacket()
622 		bcopy(mtod(m, char *), mtod(n, char *), n->m_len);  in m_copypacket()
634 		n->m_len = m->m_len;  in m_copypacket()
639 			bcopy(mtod(m, char *), mtod(n, char *), n->m_len);  in m_copypacket()
659 	KASSERT(off < m->m_len,  in m_copyfromunmapped()
687 		if (off < m->m_len)  in m_copydata()
689 		off -= m->m_len;  in m_copydata()
694 		count = min(m->m_len - off, len);  in m_copydata()
750 		n->m_len = 0;  in m_dup()
757 		while (n->m_len < nsize && m != NULL) {  in m_dup()
758 			int chunk = min(nsize - n->m_len, m->m_len - moff);  in m_dup()
760 			m_copydata(m, moff, chunk, n->m_data + n->m_len);  in m_dup()
762 			n->m_len += chunk;  in m_dup()
764 			if (moff == m->m_len) {  in m_dup()
794 		    M_TRAILINGSPACE(m) < n->m_len) {  in m_cat()
800 		bcopy(mtod(n, caddr_t), mtod(m, caddr_t) + m->m_len,  in m_cat()
801 		    (u_int)n->m_len);  in m_cat()
802 		m->m_len += n->m_len;  in m_cat()
837 			if (m->m_len <= len) {  in m_adj()
838 				len -= m->m_len;  in m_adj()
839 				m->m_len = 0;  in m_adj()
842 				m->m_len -= len;  in m_adj()
860 			count += m->m_len;  in m_adj()
865 		if (m->m_len >= len) {  in m_adj()
866 			m->m_len -= len;  in m_adj()
883 			if (m->m_len >= count) {  in m_adj()
884 				m->m_len = count;  in m_adj()
891 			count -= m->m_len;  in m_adj()
944 		if (n->m_len >= len)  in m_pullup()
948 		len -= m->m_len;  in m_pullup()
958 	space = &m->m_dat[MLEN] - (m->m_data + m->m_len);  in m_pullup()
960 		count = min(min(max(len, max_protohdr), space), n->m_len);  in m_pullup()
961 		bcopy(mtod(n, caddr_t), mtod(m, caddr_t) + m->m_len,  in m_pullup()
964 		m->m_len += count;  in m_pullup()
965 		n->m_len -= count;  in m_pullup()
967 		if (n->m_len)  in m_pullup()
1002 	space = &m->m_dat[MLEN] - (m->m_data + m->m_len);  in m_copyup()
1004 		count = min(min(max(len, max_protohdr), space), n->m_len);  in m_copyup()
1005 		memcpy(mtod(m, caddr_t) + m->m_len, mtod(n, caddr_t),  in m_copyup()
1008 		m->m_len += count;  in m_copyup()
1009 		n->m_len -= count;  in m_copyup()
1011 		if (n->m_len)  in m_copyup()
1044 	for (m = m0; m && len > m->m_len; m = m->m_next)  in m_split()
1045 		len -= m->m_len;  in m_split()
1048 	remain = m->m_len - len;  in m_split()
1086 				n->m_len = 0;  in m_split()
1108 	n->m_len = remain;  in m_split()
1109 	m->m_len = len;  in m_split()
1136 		if (len > m->m_len)  in mc_split()
1137 			len -= m->m_len;  in mc_split()
1145 	remain = m->m_len - len;  in mc_split()
1163 		MPASS(n->m_len == 0);  in mc_split()
1165 		n->m_len = remain;  in mc_split()
1166 		m->m_len -= remain;  in mc_split()
1233 		m->m_len = len = min(totlen, len);  in m_devget()
1255 	KASSERT(off < m->m_len, ("m_copytounmapped: len exceeds mbuf length"));  in m_copytounmapped()
1283 	while (off > (mlen = m->m_len)) {  in m_copyback()
1291 			n->m_len = min(MLEN, len + off);  in m_copyback()
1297 		if (m->m_next == NULL && (len > m->m_len - off)) {  in m_copyback()
1298 			m->m_len += min(len - (m->m_len - off),  in m_copyback()
1301 		mlen = min (m->m_len - off, len);  in m_copyback()
1317 			n->m_len = min(MLEN, len);  in m_copyback()
1349 		bcopy(cp, mtod(m, caddr_t) + m->m_len, space);  in m_append()
1350 		m->m_len += space;  in m_append()
1361 		n->m_len = min(MLEN, remainder);  in m_append()
1362 		bcopy(cp, mtod(n, caddr_t), n->m_len);  in m_append()
1363 		cp += n->m_len, remainder -= n->m_len;  in m_append()
1444 		if (off < m->m_len)  in m_apply()
1446 		off -= m->m_len;  in m_apply()
1452 		count = min(m->m_len - off, len);  in m_apply()
1472 		if (m->m_len > loc) {  in m_getptr()
1476 			loc -= m->m_len;  in m_getptr()
1480 					*off = m->m_len;  in m_getptr()
1509 		pdata = m2->m_len;  in m_print()
1512 		printf("mbuf: %p len: %d, next: %p, %b%s", m2, m2->m_len,  in m_print()
1519 			len -= m2->m_len;  in m_print()
1545 		len += m->m_len;  in m_length()
1614 		m_new->m_len = length;  in m_defrag()
1706 		    n->m_len < M_TRAILINGSPACE(m)) {  in m_collapse()
1707 			m_copydata(n, 0, n->m_len,  in m_collapse()
1708 			    mtod(m, char *) + m->m_len);  in m_collapse()
1709 			m->m_len += n->m_len;  in m_collapse()
1726 		    n->m_len + n2->m_len < MCLBYTES) {  in m_collapse()
1730 			m_copydata(n, 0,  n->m_len, mtod(m, char *));  in m_collapse()
1731 			m_copydata(n2, 0,  n2->m_len,  in m_collapse()
1732 			    mtod(m, char *) + n->m_len);  in m_collapse()
1733 			m->m_len = n->m_len + n2->m_len;  in m_collapse()
1827 		m_last->m_len = fraglen;  in m_fragment()
1932 		mb->m_len = length;  in m_uiotombuf_nomap()
2037 		mb->m_len = mlen;  in mc_uiotomc()
2117 		length = min(m->m_len, total - progress);  in m_mbuftouio()
2164 			    m->m_len <= M_TRAILINGSPACE(mprev)) {  in m_unshare()
2166 				memcpy(mtod(mprev, caddr_t) + mprev->m_len,  in m_unshare()
2167 				    mtod(m, caddr_t), m->m_len);  in m_unshare()
2168 				mprev->m_len += m->m_len;  in m_unshare()
2193 		    m->m_len <= M_TRAILINGSPACE(mprev)) {  in m_unshare()
2195 			memcpy(mtod(mprev, caddr_t) + mprev->m_len,  in m_unshare()
2196 			    mtod(m, caddr_t), m->m_len);  in m_unshare()
2197 			mprev->m_len += m->m_len;  in m_unshare()
2221 		len = m->m_len;  in m_unshare()
2228 			n->m_len = cc;  in m_unshare()
2277 		used += m->m_len;  in m_profile()
2280 			    m->m_ext.ext_size - m->m_len;  in m_profile()
2283 				wasted += MHLEN - m->m_len;  in m_profile()
2285 				wasted += MLEN - m->m_len;  in m_profile()