Merge ^/head r364051 through r364081.

svn path=/projects/clang1100-import/; revision=364082
2024-07-22 02:37:15 +00:00 · 2020-08-10 16:58:05 +00:00 · 2020-08-10 16:58:05 +00:00 · 8460d7540b · 2020-12-20 02:59:44 +00:00
parent a3030502fb a08d04f4e4
commit 8460d7540b
38 changed files with 2455 additions and 992 deletions
--- a/7
+++ b/7
@ -27,6 +27,13 @@ r363180:
 r363084:
 	nc(1) now implements SCTP mode, enabled by specifying the --sctp option.

+r362681:
+	A new implementation of bc and dc has been imported. It offers
+	better standards compliance, performance, localization and comes
+	with extensive test cases that are optionally installed.
+	Use WITHOUT_GH_BC=yes to build and install the world with the
+	previous version instead of the new one, if required.
+
 r362158, r362163:
 	struct export_args has changed so that the "user" specified for
 	the -maproot and -mapall exports(5) options may be in more than
--- a/lib/libclang_rt/fuzzer/Makefile
+++ b/lib/libclang_rt/fuzzer/Makefile
@ -23,4 +23,8 @@ SRCS+=		fuzzer/FuzzerUtil.cpp
 SRCS+=		fuzzer/FuzzerUtilLinux.cpp
 SRCS+=		fuzzer/FuzzerUtilPosix.cpp

+.PATH:		${CRTSRC}/include/fuzzer
+INCSDIR=	${CLANGDIR}/include/fuzzer
+INCS+=		FuzzedDataProvider.h
+
 .include <bsd.lib.mk>
--- a/lib/libclang_rt/profile/Makefile
+++ b/lib/libclang_rt/profile/Makefile
@ -25,4 +25,8 @@ SRCS+=		profile/InstrProfilingUtil.c
 SRCS+=		profile/InstrProfilingValue.c
 SRCS+=		profile/InstrProfilingWriter.c

+.PATH:		${CRTSRC}/include/profile
+INCSDIR=	${CLANGDIR}/include/profile
+INCS+=		InstrProfData.inc
+
 .include <bsd.lib.mk>
--- a/lib/libclang_rt/xray/Makefile
+++ b/lib/libclang_rt/xray/Makefile
@ -41,4 +41,10 @@ SRCS+=		xray/xray_trampoline_x86_64.S
 SRCS+=		xray/xray_utils.cpp
 SRCS+=		xray/xray_x86_64.cpp

+.PATH:		${CRTSRC}/include/xray
+INCSDIR=	${CLANGDIR}/include/xray
+INCS+=		xray_interface.h
+INCS+=		xray_log_interface.h
+INCS+=		xray_records.h
+
 .include <bsd.lib.mk>
--- a/lib/libifconfig/Makefile
+++ b/lib/libifconfig/Makefile
@ -13,15 +13,30 @@ SRCS=		libifconfig.c \
 		libifconfig_inet6.c \
 		libifconfig_internal.c \
 		libifconfig_lagg.c \
-		libifconfig_media.c
+		libifconfig_media.c \
+		libifconfig_sfp.c
+
+GEN=		libifconfig_sfp_tables.h \
+		libifconfig_sfp_tables.c \
+		libifconfig_sfp_tables_internal.h
+
+SRCS+=	${GEN}
+
+.include <src.lua.mk>
+
+.SUFFIXES: .tpl.c .tpl.h
+.tpl.c.c .tpl.h.h: sfp.lua
+	${LUA} ${.CURDIR}/sfp.lua ${.IMPSRC} >${.TARGET}
+
+CLEANFILES+= ${GEN}

 # If libifconfig become public uncomment those two lines
 #INCSDIR=	${INCLUDEDIR}
-#INCS=		libifconfig.h
+#INCS=		libifconfig.h libifconfig_sfp.h libifconfig_sfp_tables.h

 #MAN=		libifconfig.3

-CFLAGS+= -I${.CURDIR}
+CFLAGS+= -I${.CURDIR} -I${.OBJDIR}
 NO_WCAST_ALIGN= yes

 .include <bsd.lib.mk>
--- a/lib/libifconfig/libifconfig.h
+++ b/lib/libifconfig/libifconfig.h
@ -28,6 +28,10 @@

 #pragma once

+#include <sys/types.h>
+
+#include <net/if.h>
+
 #include <netinet/in.h>
 #include <netinet6/in6_var.h>

--- a/lib/libifconfig/libifconfig_sfp.c
+++ b/lib/libifconfig/libifconfig_sfp.c
@ -0,0 +1,592 @@
+/*-
+ * Copyright (c) 2014, Alexander V. Chernikov
+ * Copyright (c) 2020, Ryan Moeller <freqlabs@FreeBSD.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+
+#include <net/if.h>
+#include <net/sff8436.h>
+#include <net/sff8472.h>
+
+#include <math.h>
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <libifconfig.h>
+#include <libifconfig_internal.h>
+#include <libifconfig_sfp.h>
+#include <libifconfig_sfp_tables_internal.h>
+
+#define     SFF_8636_EXT_COMPLIANCE 0x80
+
+struct i2c_info {
+	struct ifreq ifr;
+	ifconfig_handle_t *h;
+	int error;		/* Store first error */
+	enum sfp_id id;		/* Module type */
+};
+
+static uint8_t
+find_zero_bit(const struct sfp_enum_metadata *table, int value, int sz)
+{
+	int v, m;
+
+	for (v = 1, m = 1 << (8 * sz); v < m; v <<= 1) {
+		if ((value & v) == 0)
+			continue;
+		if (find_metadata(table, value & v) != NULL) {
+			return (value & v);
+		}
+	}
+	return (0);
+}
+
+/*
+ * Reads i2c data from opened kernel socket.
+ */
+static int
+read_i2c(struct i2c_info *ii, uint8_t addr, uint8_t off, uint8_t len,
+    uint8_t *buf)
+{
+	struct ifi2creq req;
+	int i, l;
+
+	if (ii->error != 0)
+		return (ii->error);
+
+	ii->ifr.ifr_data = (caddr_t)&req;
+
+	i = 0;
+	l = 0;
+	memset(&req, 0, sizeof(req));
+	req.dev_addr = addr;
+	req.offset = off;
+	req.len = len;
+
+	while (len > 0) {
+		l = MIN(sizeof(req.data), len);
+		req.len = l;
+		if (ifconfig_ioctlwrap(ii->h, AF_LOCAL, SIOCGI2C,
+		    &ii->ifr) != 0) {
+			ii->error = errno;
+			return (errno);
+		}
+
+		memcpy(&buf[i], req.data, l);
+		len -= l;
+		i += l;
+		req.offset += l;
+	}
+
+	return (0);
+}
+
+static int
+i2c_info_init(struct i2c_info *ii, ifconfig_handle_t *h, const char *name)
+{
+	uint8_t id_byte;
+
+	memset(ii, 0, sizeof(*ii));
+	strlcpy(ii->ifr.ifr_name, name, sizeof(ii->ifr.ifr_name));
+	ii->h = h;
+
+	/*
+	 * Try to read byte 0 from i2c:
+	 * Both SFF-8472 and SFF-8436 use it as
+	 * 'identification byte'.
+	 * Stop reading status on zero as value -
+	 * this might happen in case of empty transceiver slot.
+	 */
+	id_byte = 0;
+	read_i2c(ii, SFF_8472_BASE, SFF_8472_ID, 1, &id_byte);
+	if (ii->error != 0)
+		return (-1);
+	if (id_byte == 0) {
+		h->error.errtype = OTHER;
+		h->error.errcode = ENOENT;
+		return (-1);
+	}
+	ii->id = id_byte;
+	return (0);
+}
+
+static int
+get_sfp_info(struct i2c_info *ii, struct ifconfig_sfp_info *sfp)
+{
+	uint8_t code;
+
+	read_i2c(ii, SFF_8472_BASE, SFF_8472_ID, 1, &sfp->sfp_id);
+	read_i2c(ii, SFF_8472_BASE, SFF_8472_CONNECTOR, 1, &sfp->sfp_conn);
+
+	/* Use extended compliance code if it's valid */
+	read_i2c(ii, SFF_8472_BASE, SFF_8472_TRANS, 1, &sfp->sfp_eth_ext);
+	if (sfp->sfp_eth_ext == 0) {
+		/* Next, check 10G Ethernet/IB CCs */
+		read_i2c(ii, SFF_8472_BASE, SFF_8472_TRANS_START, 1, &code);
+		sfp->sfp_eth_10g = find_zero_bit(sfp_eth_10g_table, code, 1);
+		if (sfp->sfp_eth_10g == 0) {
+			/* No match. Try Ethernet 1G */
+			read_i2c(ii, SFF_8472_BASE, SFF_8472_TRANS_START + 3,
+			    1, &code);
+			sfp->sfp_eth = find_zero_bit(sfp_eth_table, code, 1);
+		}
+	}
+
+	return (ii->error);
+}
+
+static int
+get_qsfp_info(struct i2c_info *ii, struct ifconfig_sfp_info *sfp)
+{
+	uint8_t code;
+
+	read_i2c(ii, SFF_8436_BASE, SFF_8436_ID, 1, &sfp->sfp_id);
+	read_i2c(ii, SFF_8436_BASE, SFF_8436_CONNECTOR, 1, &sfp->sfp_conn);
+
+	read_i2c(ii, SFF_8436_BASE, SFF_8436_STATUS, 1, &sfp->sfp_rev);
+
+	/* Check for extended specification compliance */
+	read_i2c(ii, SFF_8436_BASE, SFF_8436_CODE_E1040100G, 1, &code);
+	if (code & SFF_8636_EXT_COMPLIANCE) {
+		read_i2c(ii, SFF_8436_BASE, SFF_8436_OPTIONS_START, 1,
+		    &sfp->sfp_eth_ext);
+	} else {
+		/* Check 10/40G Ethernet class only */
+		sfp->sfp_eth_1040g =
+		    find_zero_bit(sfp_eth_1040g_table, code, 1);
+	}
+
+	return (ii->error);
+}
+
+int
+ifconfig_sfp_get_sfp_info(ifconfig_handle_t *h,
+    const char *name, struct ifconfig_sfp_info *sfp)
+{
+	struct i2c_info ii;
+	char buf[8];
+
+	memset(sfp, 0, sizeof(*sfp));
+
+	if (i2c_info_init(&ii, h, name) != 0)
+		return (-1);
+
+	/* Read bytes 3-10 at once */
+	read_i2c(&ii, SFF_8472_BASE, SFF_8472_TRANS_START, 8, buf);
+	if (ii.error != 0)
+		return (ii.error);
+
+	/* Check 10G ethernet first */
+	sfp->sfp_eth_10g = find_zero_bit(sfp_eth_10g_table, buf[0], 1);
+	if (sfp->sfp_eth_10g == 0) {
+		/* No match. Try 1G */
+		sfp->sfp_eth = find_zero_bit(sfp_eth_table, buf[3], 1);
+	}
+	sfp->sfp_fc_len = find_zero_bit(sfp_fc_len_table, buf[4], 1);
+	sfp->sfp_fc_media = find_zero_bit(sfp_fc_media_table, buf[6], 1);
+	sfp->sfp_fc_speed = find_zero_bit(sfp_fc_speed_table, buf[7], 1);
+	sfp->sfp_cab_tech =
+	    find_zero_bit(sfp_cab_tech_table, (buf[4] << 8) | buf[5], 2);
+
+	if (ifconfig_sfp_id_is_qsfp(ii.id))
+		return (get_qsfp_info(&ii, sfp));
+	return (get_sfp_info(&ii, sfp));
+}
+
+static size_t
+channel_count(enum sfp_id id)
+{
+	/* TODO: other ids */
+	switch (id) {
+	case SFP_ID_UNKNOWN:
+		return (0);
+	case SFP_ID_QSFP:
+	case SFP_ID_QSFPPLUS:
+	case SFP_ID_QSFP28:
+		return (4);
+	default:
+		return (1);
+	}
+}
+
+size_t
+ifconfig_sfp_channel_count(const struct ifconfig_sfp_info *sfp)
+{
+	return (channel_count(sfp->sfp_id));
+}
+
+/*
+ * Print SFF-8472/SFF-8436 string to supplied buffer.
+ * All (vendor-specific) strings are padded right with '0x20'.
+ */
+static void
+get_sff_string(struct i2c_info *ii, uint8_t addr, uint8_t off, char *dst)
+{
+	read_i2c(ii, addr, off, SFF_VENDOR_STRING_SIZE, dst);
+	dst += SFF_VENDOR_STRING_SIZE;
+	do { *dst-- = '\0'; } while (*dst == 0x20);
+}
+
+static void
+get_sff_date(struct i2c_info *ii, uint8_t addr, uint8_t off, char *dst)
+{
+	char buf[SFF_VENDOR_DATE_SIZE];
+
+	read_i2c(ii, addr, off, SFF_VENDOR_DATE_SIZE, buf);
+	sprintf(dst, "20%c%c-%c%c-%c%c", buf[0], buf[1], buf[2], buf[3],
+	    buf[4], buf[5]);
+}
+
+static int
+get_sfp_vendor_info(struct i2c_info *ii, struct ifconfig_sfp_vendor_info *vi)
+{
+	get_sff_string(ii, SFF_8472_BASE, SFF_8472_VENDOR_START, vi->name);
+	get_sff_string(ii, SFF_8472_BASE, SFF_8472_PN_START, vi->pn);
+	get_sff_string(ii, SFF_8472_BASE, SFF_8472_SN_START, vi->sn);
+	get_sff_date(ii, SFF_8472_BASE, SFF_8472_DATE_START, vi->date);
+	return (ii->error);
+}
+
+static int
+get_qsfp_vendor_info(struct i2c_info *ii, struct ifconfig_sfp_vendor_info *vi)
+{
+	get_sff_string(ii, SFF_8436_BASE, SFF_8436_VENDOR_START, vi->name);
+	get_sff_string(ii, SFF_8436_BASE, SFF_8436_PN_START, vi->pn);
+	get_sff_string(ii, SFF_8436_BASE, SFF_8436_SN_START, vi->sn);
+	get_sff_date(ii, SFF_8436_BASE, SFF_8436_DATE_START, vi->date);
+	return (ii->error);
+}
+
+int
+ifconfig_sfp_get_sfp_vendor_info(ifconfig_handle_t *h,
+    const char *name, struct ifconfig_sfp_vendor_info *vi)
+{
+	struct i2c_info ii;
+
+	memset(vi, 0, sizeof(*vi));
+
+	if (i2c_info_init(&ii, h, name) != 0)
+		return (-1);
+
+	if (ifconfig_sfp_id_is_qsfp(ii.id))
+		return (get_qsfp_vendor_info(&ii, vi));
+	return (get_sfp_vendor_info(&ii, vi));
+}
+
+/*
+ * Converts internal temperature (SFF-8472, SFF-8436)
+ * 16-bit unsigned value to human-readable representation:
+ *
+ * Internally measured Module temperature are represented
+ * as a 16-bit signed twos complement value in increments of
+ * 1/256 degrees Celsius, yielding a total range of –128C to +128C
+ * that is considered valid between –40 and +125C.
+ */
+static double
+get_sff_temp(struct i2c_info *ii, uint8_t addr, uint8_t off)
+{
+	double d;
+	uint8_t buf[2];
+
+	read_i2c(ii, addr, off, 2, buf);
+	d = (double)buf[0];
+	d += (double)buf[1] / 256;
+	return (d);
+}
+
+/*
+ * Retrieves supplied voltage (SFF-8472, SFF-8436).
+ * 16-bit usigned value, treated as range 0..+6.55 Volts
+ */
+static double
+get_sff_voltage(struct i2c_info *ii, uint8_t addr, uint8_t off)
+{
+	double d;
+	uint8_t buf[2];
+
+	read_i2c(ii, addr, off, 2, buf);
+	d = (double)((buf[0] << 8) | buf[1]);
+	return (d / 10000);
+}
+
+/*
+ * The following conversions assume internally-calibrated data.
+ * This is always true for SFF-8346, and explicitly checked for SFF-8472.
+ */
+
+double
+power_mW(uint16_t power)
+{
+	/* Power is specified in units of 0.1 uW. */
+	return (1.0 * power / 10000);
+}
+
+double
+power_dBm(uint16_t power)
+{
+	return (10.0 * log10(power_mW(power)));
+}
+
+double
+bias_mA(uint16_t bias)
+{
+	/* Bias current is specified in units of 2 uA. */
+	return (1.0 * bias / 500);
+}
+
+static uint16_t
+get_sff_channel(struct i2c_info *ii, uint8_t addr, uint8_t off)
+{
+	uint8_t buf[2];
+
+	read_i2c(ii, addr, off, 2, buf);
+	if (ii->error != 0)
+		return (0);
+
+	return ((buf[0] << 8) + buf[1]);
+}
+
+static int
+get_sfp_status(struct i2c_info *ii, struct ifconfig_sfp_status *ss)
+{
+	uint8_t diag_type, flags;
+
+	/* Read diagnostic monitoring type */
+	read_i2c(ii, SFF_8472_BASE, SFF_8472_DIAG_TYPE, 1, (caddr_t)&diag_type);
+	if (ii->error != 0)
+		return (-1);
+
+	/*
+	 * Read monitoring data IFF it is supplied AND is
+	 * internally calibrated
+	 */
+	flags = SFF_8472_DDM_DONE | SFF_8472_DDM_INTERNAL;
+	if ((diag_type & flags) != flags) {
+		ii->h->error.errtype = OTHER;
+		ii->h->error.errcode = ENXIO;
+		return (-1);
+	}
+
+	ss->temp = get_sff_temp(ii, SFF_8472_DIAG, SFF_8472_TEMP);
+	ss->voltage = get_sff_voltage(ii, SFF_8472_DIAG, SFF_8472_VCC);
+	ss->channel = calloc(channel_count(ii->id), sizeof(*ss->channel));
+	if (ss->channel == NULL) {
+		ii->h->error.errtype = OTHER;
+		ii->h->error.errcode = ENOMEM;
+		return (-1);
+	}
+	ss->channel[0].rx = get_sff_channel(ii, SFF_8472_DIAG, SFF_8472_RX_POWER);
+	ss->channel[0].tx = get_sff_channel(ii, SFF_8472_DIAG, SFF_8472_TX_BIAS);
+	return (ii->error);
+}
+
+static uint32_t
+get_qsfp_bitrate(struct i2c_info *ii)
+{
+	uint8_t code;
+	uint32_t rate;
+
+	code = 0;
+	read_i2c(ii, SFF_8436_BASE, SFF_8436_BITRATE, 1, &code);
+	rate = code * 100;
+	if (code == 0xFF) {
+		read_i2c(ii, SFF_8436_BASE, SFF_8636_BITRATE, 1, &code);
+		rate = code * 250;
+	}
+
+	return (rate);
+}
+
+static int
+get_qsfp_status(struct i2c_info *ii, struct ifconfig_sfp_status *ss)
+{
+	size_t channels;
+
+	ss->temp = get_sff_temp(ii, SFF_8436_BASE, SFF_8436_TEMP);
+	ss->voltage = get_sff_voltage(ii, SFF_8436_BASE, SFF_8436_VCC);
+	channels = channel_count(ii->id);
+	ss->channel = calloc(channels, sizeof(*ss->channel));
+	if (ss->channel == NULL) {
+		ii->h->error.errtype = OTHER;
+		ii->h->error.errcode = ENOMEM;
+		return (-1);
+	}
+	for (size_t chan = 0; chan < channels; ++chan) {
+		uint8_t rxoffs = SFF_8436_RX_CH1_MSB + chan * sizeof(uint16_t);
+		uint8_t txoffs = SFF_8436_TX_CH1_MSB + chan * sizeof(uint16_t);
+		ss->channel[chan].rx =
+		    get_sff_channel(ii, SFF_8436_BASE, rxoffs);
+		ss->channel[chan].tx =
+		    get_sff_channel(ii, SFF_8436_BASE, txoffs);
+	}
+	ss->bitrate = get_qsfp_bitrate(ii);
+	return (ii->error);
+}
+
+int
+ifconfig_sfp_get_sfp_status(ifconfig_handle_t *h, const char *name,
+    struct ifconfig_sfp_status *ss)
+{
+	struct i2c_info ii;
+
+	memset(ss, 0, sizeof(*ss));
+
+	if (i2c_info_init(&ii, h, name) != 0)
+		return (-1);
+
+	if (ifconfig_sfp_id_is_qsfp(ii.id))
+		return (get_qsfp_status(&ii, ss));
+	return (get_sfp_status(&ii, ss));
+}
+
+void
+ifconfig_sfp_free_sfp_status(struct ifconfig_sfp_status *ss)
+{
+	if (ss != NULL)
+		free(ss->channel);
+}
+
+static const char *
+sfp_id_string_alt(uint8_t value)
+{
+	const char *id;
+
+	if (value <= SFF_8024_ID_LAST)
+		id = sff_8024_id[value];
+	else if (value > 0x80)
+		id = "Vendor specific";
+	else
+		id = "Reserved";
+
+	return (id);
+}
+
+static const char *
+sfp_conn_string_alt(uint8_t value)
+{
+	const char *conn;
+
+	if (value >= 0x0D && value <= 0x1F)
+		conn = "Unallocated";
+	else if (value >= 0x24 && value <= 0x7F)
+		conn = "Unallocated";
+	else
+		conn = "Vendor specific";
+
+	return (conn);
+}
+
+void
+ifconfig_sfp_get_sfp_info_strings(const struct ifconfig_sfp_info *sfp,
+    struct ifconfig_sfp_info_strings *strings)
+{
+	get_sfp_info_strings(sfp, strings);
+	if (strings->sfp_id == NULL)
+		strings->sfp_id = sfp_id_string_alt(sfp->sfp_id);
+	if (strings->sfp_conn == NULL)
+		strings->sfp_conn = sfp_conn_string_alt(sfp->sfp_conn);
+	if (strings->sfp_rev == NULL)
+		strings->sfp_rev = "Unallocated";
+}
+
+const char *
+ifconfig_sfp_physical_spec(const struct ifconfig_sfp_info *sfp,
+    const struct ifconfig_sfp_info_strings *strings)
+{
+	switch (sfp->sfp_id) {
+	case SFP_ID_UNKNOWN:
+		break;
+	case SFP_ID_QSFP:
+	case SFP_ID_QSFPPLUS:
+	case SFP_ID_QSFP28:
+		if (sfp->sfp_eth_1040g & SFP_ETH_1040G_EXTENDED)
+			return (strings->sfp_eth_ext);
+		else if (sfp->sfp_eth_1040g)
+			return (strings->sfp_eth_1040g);
+		break;
+	default:
+		if (sfp->sfp_eth_ext)
+			return (strings->sfp_eth_ext);
+		else if (sfp->sfp_eth_10g)
+			return (strings->sfp_eth_10g);
+		else if (sfp->sfp_eth)
+			return (strings->sfp_eth);
+		break;
+	}
+	return ("Unknown");
+}
+
+int
+ifconfig_sfp_get_sfp_dump(ifconfig_handle_t *h, const char *name,
+    struct ifconfig_sfp_dump *dump)
+{
+	struct i2c_info ii;
+	uint8_t *buf = dump->data;
+
+	memset(dump->data, 0, sizeof(dump->data));
+
+	if (i2c_info_init(&ii, h, name) != 0)
+		return (-1);
+
+	if (ifconfig_sfp_id_is_qsfp(ii.id)) {
+		read_i2c(&ii, SFF_8436_BASE, QSFP_DUMP0_START, QSFP_DUMP0_SIZE,
+		    buf + QSFP_DUMP0_START);
+		read_i2c(&ii, SFF_8436_BASE, QSFP_DUMP1_START, QSFP_DUMP1_SIZE,
+		    buf + QSFP_DUMP1_START);
+	} else {
+		read_i2c(&ii, SFF_8472_BASE, SFP_DUMP_START, SFP_DUMP_SIZE,
+		    buf + SFP_DUMP_START);
+	}
+
+	return (ii.error != 0 ? -1 : 0);
+}
+
+size_t
+ifconfig_sfp_dump_region_count(const struct ifconfig_sfp_dump *dp)
+{
+	uint8_t id_byte = dp->data[0];
+
+	switch ((enum sfp_id)id_byte) {
+	case SFP_ID_UNKNOWN:
+		return (0);
+	case SFP_ID_QSFP:
+	case SFP_ID_QSFPPLUS:
+	case SFP_ID_QSFP28:
+		return (2);
+	default:
+		return (1);
+	}
+}
--- a/lib/libifconfig/libifconfig_sfp.h
+++ b/lib/libifconfig/libifconfig_sfp.h
@ -0,0 +1,219 @@
+/*-
+ * Copyright (c) 2014, Alexander V. Chernikov
+ * Copyright (c) 2020, Ryan Moeller <freqlabs@FreeBSD.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#pragma once
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#include <libifconfig.h>
+#include <libifconfig_sfp_tables.h>
+
+/** SFP module information in raw numeric form
+ * These are static properties of the hardware.
+ */
+struct ifconfig_sfp_info;
+
+/** SFP module information formatted as strings
+ * These are static strings that do not need to be freed.
+ */
+struct ifconfig_sfp_info_strings;
+
+#define SFF_VENDOR_STRING_SIZE	16	/**< max chars in a vendor string */
+#define SFF_VENDOR_DATE_SIZE	6	/**< chars in a vendor date code */
+
+/** SFP module vendor info strings */
+struct ifconfig_sfp_vendor_info {
+	char name[SFF_VENDOR_STRING_SIZE + 1];	/**< vendor name */
+	char pn[SFF_VENDOR_STRING_SIZE + 1];	/**< vendor part number */
+	char sn[SFF_VENDOR_STRING_SIZE + 1];	/**< vendor serial number */
+	char date[SFF_VENDOR_DATE_SIZE + 5];	/**< formatted vendor date */
+};
+
+/** SFP module status
+ * These are dynamic properties of the hardware.
+ */
+struct ifconfig_sfp_status {
+	double temp;		/**< module temperature in degrees C,
+				     valid range -40.0 to 125.0 */
+	double voltage;		/**< module voltage in volts */
+	struct sfp_channel {
+		uint16_t rx;	/**< channel receive power, LSB 0.1uW */
+		uint16_t tx;	/**< channel transmit bias current, LSB 2uA */
+	} *channel;		/**< array of channel rx/tx status */
+	uint32_t bitrate;	/**< link bitrate,
+				     only present for QSFP modules,
+				     zero for SFP modules */
+};
+
+#define SFF_DUMP_SIZE	256	/**< size of the memory dump buffer */
+
+#define SFP_DUMP_START	0	/**< start address of an SFP module dump */
+#define SFP_DUMP_SIZE	128	/**< bytes in an SFP module dump */
+
+#define QSFP_DUMP0_START	0	/**< start address of the first region
+					     in a QSFP module dump */
+#define QSFP_DUMP0_SIZE		82	/**< bytes in the first region
+					     in a QSFP module dump */
+#define QSFP_DUMP1_START	128	/**< start address of the second region
+					     in a QSFP module dump */
+#define QSFP_DUMP1_SIZE		128	/**< bytes in the second region
+					     in a QSFP module dump */
+
+/** SFP module I2C memory dump
+ * SFP modules have one region, QSFP modules have two regions.
+ */
+struct ifconfig_sfp_dump {
+	uint8_t data[SFF_DUMP_SIZE];	/**< memory dump data */
+};
+
+/** Get information about the static properties of an SFP/QSFP module
+ * The information is returned in numeric form.
+ * @see ifconfig_sfp_get_sfp_info_strings to get corresponding strings.
+ * @param h	An open ifconfig state handle
+ * @param name	The name of an interface
+ * @param sfp	Pointer to an object to fill, will be zeroed by this function
+ * @return	0 if successful, -1 with error info set in the handle otherwise
+ */
+int ifconfig_sfp_get_sfp_info(ifconfig_handle_t *h, const char *name,
+    struct ifconfig_sfp_info *sfp);
+
+/** Get the number of channels present on the given module
+ * @param sfp	Pointer to a filled SFP module info object
+ * @return	The number of channels or 0 if unknown
+ */
+size_t ifconfig_sfp_channel_count(const struct ifconfig_sfp_info *sfp);
+
+/** Is the given module ID a QSFP
+ * NB: This convenience function is implemented in the header to keep the
+ * classification criteria visible to the user.
+ * @param id	The sfp_id field of a SFP module info object
+ * @return	A bool true if QSFP-type sfp_id otherwise false
+ */
+static inline bool
+ifconfig_sfp_id_is_qsfp(enum sfp_id id)
+{
+	switch (id) {
+	case SFP_ID_QSFP:
+	case SFP_ID_QSFPPLUS:
+	case SFP_ID_QSFP28:
+		return (true);
+	default:
+		return (false);
+	}
+}
+
+/** Get string descriptions of the given SFP/QSFP module info
+ * The strings are static and do not need to be freed.
+ * @see ifconfig_sfp_get_sfp_info to obtain the input info.
+ * @param sfp	Pointer to a filled SFP module info object
+ * @param strings	Pointer to an object to be filled with pointers to
+ *                      static strings describing the given info
+ */
+void ifconfig_sfp_get_sfp_info_strings(const struct ifconfig_sfp_info *sfp,
+    struct ifconfig_sfp_info_strings *strings);
+
+/** Get a string describing the given SFP/QSFP module's physical layer spec
+ * The correct field in ifconfig_sfp_info varies depending on the module.  This
+ * function chooses the appropriate string based on the provided module info.
+ * The string returned is static and does not need to be freed.
+ * @param sfp	Pointer to a filled SFP module info object
+ * @param strings	Pointer to a filled SFP module strings object
+ * @return	Pointer to a static string describing the module's spec
+ */
+const char *ifconfig_sfp_physical_spec(const struct ifconfig_sfp_info *sfp,
+    const struct ifconfig_sfp_info_strings *strings);
+
+/** Get the vendor info strings from an SFP/QSFP module
+ * @param h	An open ifconfig state handle
+ * @param name	The name of an interface
+ * @param vi	Pointer to an object to be filled with the vendor info strings,
+ *              will be zeroed by this function
+ * @return	0 if successful, -1 with error info set in the handle otherwise
+ */
+int ifconfig_sfp_get_sfp_vendor_info(ifconfig_handle_t *h, const char *name,
+    struct ifconfig_sfp_vendor_info *vi);
+
+/** Get the status of an SFP/QSFP module's dynamic properties
+ * @see ifconfig_sfp_free_sfp_status to free the allocations
+ * @param h	An open ifconfig state handle
+ * @param name	The name of an interface
+ * @param ss	Pointer to an object to be filled with the module's status
+ * @return	0 if successful, -1 with error info set in the handle otherwise
+ *              where the errcode `ENXIO` indicates an SFP module that is not
+ *              calibrated or does not provide diagnostic status measurements
+ */
+int ifconfig_sfp_get_sfp_status(ifconfig_handle_t *h, const char *name,
+    struct ifconfig_sfp_status *ss);
+
+/** Free the memory allocations in an ifconfig_sfp_status struct
+ * @param ss	Pointer to an object whose internal allocations are to be freed
+ * 		if not NULL
+ */
+void ifconfig_sfp_free_sfp_status(struct ifconfig_sfp_status *ss);
+
+/** Dump the I2C memory of an SFP/QSFP module
+ * SFP modules have one memory region dumped, QSFP modules have two.
+ * @param h	An open ifconfig state handle
+ * @param name	The name of an interface
+ * @param buf	Pointer to a dump data buffer object
+ * @return	0 if successful, -1 with error info set in the handle otherwise
+ */
+int ifconfig_sfp_get_sfp_dump(ifconfig_handle_t *h, const char *name,
+    struct ifconfig_sfp_dump *buf);
+
+/** Get the number of I2C memory dump regions present in the given dump
+ * @param dp	Pointer to a filled dump data buffer object
+ * @return	The number of regions or 0 if unknown
+ */
+size_t ifconfig_sfp_dump_region_count(const struct ifconfig_sfp_dump *dp);
+
+/** Convert channel power to milliwatts power
+ * This is provided as a convenience for displaying channel power levels.
+ * @see (struct ifconfig_sfp_status).channel
+ * @param power	Power in 0.1 mW units
+ * @return	Power in milliwatts (mW)
+ */
+double power_mW(uint16_t power);
+
+/** Convert channel power to decibel-milliwats power level
+ * This is provided as a convenience for displaying channel power levels.
+ * @see (struct ifconfig_sfp_status).channel
+ * @param power	Power in 0.1 mW units
+ * @return	Power level in decibel-milliwatts (dBm)
+ */
+
+double power_dBm(uint16_t power);
+
+/** Convert channel bias current to milliamps
+ * This is provided as a convenience for displaying channel bias currents.
+ * @see (struct ifconfig_sfp_status).channel
+ * @param bias	Bias current in 2 mA units
+ * @return	Bias current in milliamps (mA)
+ */
+double bias_mA(uint16_t bias);
--- a/lib/libifconfig/libifconfig_sfp_tables.tpl.c
+++ b/lib/libifconfig/libifconfig_sfp_tables.tpl.c
@ -0,0 +1,124 @@
+/*-
+ * Copyright (c) 2020, Ryan Moeller <freqlabs@FreeBSD.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+{# THIS IS A TEMPLATE PROCESSED BY lib/libifconfig/sfp.lua #}
+
+#include <libifconfig_sfp_tables.h>
+#include <libifconfig_sfp_tables_internal.h>
+
+struct sfp_enum_metadata {
+	int		value;		/* numeric discriminant value */
+	const char	*symbol;	/* symbolic name */
+	const char	*description;	/* brief description */
+	const char	*display;	/* shortened display name */
+};
+
+const struct sfp_enum_metadata *
+find_metadata(const struct sfp_enum_metadata *table, int value)
+{
+	while (table->value != value && table->symbol != NULL)
+		++table;
+	return (table->symbol != NULL ? table : NULL);
+}
+
+{%
+for _, ent in ipairs(enums) do
+    if type(ent) == "string" then
+%}
+/*
+ * {*ent*}
+ */
+
+{%
+    else
+        local enum = ent
+        local name = "sfp_"..enum.name
+        local sym, desc, disp
+%}
+static const struct sfp_enum_metadata {*name*}_table_[] = {
+{%
+        for _, item in ipairs(enum.values) do
+            _, sym, desc, disp = table.unpack(item)
+            local symbol = string.upper(name).."_"..sym
+%}
+	{
+		.value = {*symbol*},
+		.symbol = "{*symbol*}",
+		.description = "{*desc*}",
+{%
+            if disp then
+%}
+		.display = "{*disp*}",
+{%
+            end
+%}
+	},
+{%
+        end
+%}
+	{0}
+};
+const struct sfp_enum_metadata *{*name*}_table = {*name*}_table_;
+
+const char *
+ifconfig_{*name*}_symbol(enum {*name*} v)
+{
+	const struct sfp_enum_metadata *metadata;
+
+	if ((metadata = find_metadata({*name*}_table, v)) == NULL)
+		return (NULL);
+	return (metadata->symbol);
+}
+
+const char *
+ifconfig_{*name*}_description(enum {*name*} v)
+{
+	const struct sfp_enum_metadata *metadata;
+
+	if ((metadata = find_metadata({*name*}_table, v)) == NULL)
+		return (NULL);
+	return (metadata->description);
+}
+
+{%
+        if disp then
+%}
+const char *
+ifconfig_{*name*}_display(enum {*name*} v)
+{
+	const struct sfp_enum_metadata *metadata;
+
+	if ((metadata = find_metadata({*name*}_table, v)) == NULL)
+		return (NULL);
+	return (metadata->display);
+}
+
+{%
+        end
+    end
+end
+%}
--- a/lib/libifconfig/libifconfig_sfp_tables.tpl.h
+++ b/lib/libifconfig/libifconfig_sfp_tables.tpl.h
@ -0,0 +1,130 @@
+/*-
+ * Copyright (c) 2020, Ryan Moeller <freqlabs@FreeBSD.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+{# THIS IS A TEMPLATE PROCESSED BY lib/libifconfig/sfp.lua #}
+
+#pragma once
+
+#include <stdint.h>
+
+{%
+for _, ent in ipairs(enums) do
+    if type(ent) == "string" then
+%}
+/*
+ * {*ent*}
+ */
+
+{%
+    else
+        local enum = ent
+        local name = "sfp_"..enum.name
+        local num, sym, desc, disp
+%}
+/** {*enum.description*} */
+enum {*name*} {
+{%
+        for _, item in ipairs(enum.values) do
+            val, sym, desc, disp = table.unpack(item)
+            local symbol = string.upper(name).."_"..sym
+%}
+	{*symbol*} = {*val*}, /**< {*desc*} */
+{%
+        end
+%}
+};
+
+/** Get the symbolic name of a given {*name*} value */
+const char *ifconfig_{*name*}_symbol(enum {*name*});
+
+/** Get a brief description of a given {*name*} value */
+const char *ifconfig_{*name*}_description(enum {*name*});
+
+{%
+        if disp then
+%}
+/** Get a shortened user-friendly display name for a given {*name*} value */
+const char *ifconfig_{*name*}_display(enum {*name*});
+
+{%
+        end
+    end
+end
+%}
+/*
+ * Descriptions of each enum
+ */
+
+{%
+for _, ent in ipairs(enums) do
+    if type(ent) == "table" then
+        local enum = ent
+        local name = "sfp_"..enum.name
+%}
+/** Get a brief description of the {*name*} enum */
+static inline const char *
+ifconfig_enum_{*name*}_description(void)
+{
+	return ("{*enum.description*}");
+}
+
+{%
+    end
+end
+%}
+/*
+ * Info struct definitions
+ */
+
+struct ifconfig_sfp_info {
+{%
+for _, ent in ipairs(enums) do
+    if type(ent) == "table" then
+        local enum = ent
+        local name = "sfp_"..enum.name
+        local t = string.format("uint%d_t", enum.bits)
+%}
+	{*t*} {*name*}; /**< {*enum.description*} */
+{%
+    end
+end
+%}
+};
+
+struct ifconfig_sfp_info_strings {
+{%
+for _, ent in ipairs(enums) do
+    if type(ent) == "table" then
+        local enum = ent
+        local name = "sfp_"..enum.name
+%}
+	const char *{*name*}; /**< {*enum.description*} */
+{%
+    end
+end
+%}
+};
--- a/lib/libifconfig/libifconfig_sfp_tables_internal.tpl.h
+++ b/lib/libifconfig/libifconfig_sfp_tables_internal.tpl.h
@ -0,0 +1,66 @@
+/*-
+ * Copyright (c) 2020, Ryan Moeller <freqlabs@FreeBSD.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+{# THIS IS A TEMPLATE PROCESSED BY lib/libifconfig/sfp.lua #}
+
+#pragma once
+
+#include <libifconfig_sfp.h>
+#include <libifconfig_sfp_tables.h>
+
+struct sfp_enum_metadata;
+const struct sfp_enum_metadata *find_metadata(const struct sfp_enum_metadata *,
+    int);
+
+{%
+for _, ent in ipairs(enums) do
+    if type(ent) == "table" then
+        local enum = ent
+        local name = "sfp_"..enum.name
+%}
+extern const struct sfp_enum_metadata *{*name*}_table;
+{%
+    end
+end
+%}
+
+static inline void
+get_sfp_info_strings(const struct ifconfig_sfp_info *sfp,
+    struct ifconfig_sfp_info_strings *strings)
+{
+{%
+for _, ent in ipairs(enums) do
+    if type(ent) == "table" then
+        local enum = ent
+        local name = "sfp_"..enum.name
+%}
+	strings->{*name*} = ifconfig_{*name*}_description(sfp->{*name*});
+{%
+    end
+end
+%}
+}
--- a/lib/libifconfig/sfp.lua
+++ b/lib/libifconfig/sfp.lua
@ -0,0 +1,367 @@
+#!/usr/libexec/flua
+-- ex: sw=4 et:
+--[[
+/*-
+ * Copyright (c) 2014, Alexander V. Chernikov
+ * Copyright (c) 2020, Ryan Moeller <freqlabs@FreeBSD.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+]]
+
+-- Try to put the template.lua library in the package search path.
+package.path = (os.getenv("SRCTOP") or "/usr/src").."/tools/lua/?.lua"
+
+-- Render the template named by the first argument to this script.
+require("template").render(arg[1], { -- This table is the template's context.
+
+-- The table `enums' is accessible in the template.  It is a list of strings
+-- and tables that describe the various enum types we are generating and the
+-- ancillary metadata for generating other related code.
+enums = {
+
+    -- Strings at this level are rendered as block comments for convenience.
+    "SFF-8024 Rev. 4.6 Table 4-1: Indentifier Values",
+
+    -- This table describes an enum type, in this case enum sfp_id:
+    {
+        name = "id", -- The template prepends the sfp_ prefix to our name.
+        description = "Transceiver identifier",
+
+        -- What width int is needed to store this type:
+        bits = 8, -- This could be inferred by the values below...
+
+        -- The values, symbols, display names, and descriptions of this enum:
+        values =  {
+            -- The prefix SFP_ID_ is prepended to the symbolic names.
+            -- Only this enum has shortened names for the values, though they
+            -- could be added to the other enums.
+
+            -- value, symbolic name, description, shortened name
+            {0x00, "UNKNOWN",   "Unknown or unspecified", "Unknown"},
+            {0x01, "GBIC",      "GBIC",               "GBIC"},
+            {0x02, "SFF",       "Module soldered to motherboard (ex: SFF)",
+                "SFF"},
+            {0x03, "SFP",       "SFP or SFP+",        "SFP/SFP+/SFP28"},
+            {0x04, "XBI",       "300 pin XBI",        "XBI"},
+            {0x05, "XENPAK",    "Xenpak",             "Xenpak"},
+            {0x06, "XFP",       "XFP",                "XFP"},
+            {0x07, "XFF",       "XFF",                "XFF"},
+            {0x08, "XFPE",      "XFP-E",              "XFP-E"},
+            {0x09, "XPAK",      "XPAK",               "XPAK"},
+            {0x0A, "X2",        "X2",                 "X2"},
+            {0x0B, "DWDM_SFP",  "DWDM-SFP/SFP+",      "DWDM-SFP/SFP+"},
+            {0x0C, "QSFP",      "QSFP",               "QSFP"},
+            {0x0D, "QSFPPLUS",  "QSFP+ or later",     "QSFP+"},
+            {0x0E, "CXP",       "CXP",                "CXP"},
+            {0x0F, "HD4X",      "Shielded Mini Multilane HD 4X", "HD4X"},
+            {0x10, "HD8X",      "Shielded Mini Multilane HD 8X", "HD8X"},
+            {0x11, "QSFP28",    "QSFP28 or later",    "QSFP28"},
+            {0x12, "CXP2",      "CXP2 (aka CXP28)",   "CXP2"},
+            {0x13, "CDFP",      "CDFP (Style 1/Style 2)", "CDFP"},
+            {0x14, "SMM4",      "Shielded Mini Multilane HD 4X fanout",
+                "SMM4"},
+            {0x15, "SMM8",      "Shielded Mini Multilane HD 8X fanout",
+                "SMM8"},
+            {0x16, "CDFP3",     "CDFP (Style 3)",     "CDFP3"},
+            {0x17, "MICROQSFP", "microQSFP",          "microQSFP"},
+            {0x18, "QSFP_DD",   "QSFP-DD 8X pluggable transceiver", "QSFP-DD"},
+            {0x19, "QSFP8X",    "QSFP 8X pluggable transceiver", "QSFP8X"},
+            {0x1A, "SFP_DD",    "SFP-DD 2X pluggable transceiver", "SFP-DD"},
+            {0x1B, "DSFP",      "DSFP Dual SFP pluggable transceiver", "DSFP"},
+            {0x1C, "X4ML",      "x4 MiniLink/OcuLink", "x4MiniLink/OcuLink"},
+            {0x1D, "X8ML",      "x8 MiniLink", "x8MiniLink"},
+            {0x1E, "QSFP_CMIS",
+                "QSFP+ or later w/Common Management Interface Specification",
+                "QSFP+(CMIS)"},
+        },
+    },
+
+    "SFF-8024 Rev. 4.6 Table 4-3: Connector Types",
+    {
+        name = "conn",
+        description = "Connector type",
+        bits = 8,
+        values = {
+            {0x00, "UNKNOWN",         "Unknown"},
+            {0x01, "SC",              "SC"},
+            {0x02, "FC_1_COPPER",     "Fibre Channel Style 1 copper"},
+            {0x03, "FC_2_COPPER",     "Fibre Channel Style 2 copper"},
+            {0x04, "BNC_TNC",         "BNC/TNC"},
+            {0x05, "FC_COAX",         "Fibre Channel coaxial"},
+            {0x06, "FIBER_JACK",      "Fiber Jack"},
+            {0x07, "LC",              "LC"},
+            {0x08, "MT_RJ",           "MT-RJ"},
+            {0x09, "MU",              "MU"},
+            {0x0A, "SG",              "SG"},
+            {0x0B, "OPTICAL_PIGTAIL", "Optical pigtail"},
+            {0x0C, "MPO_1X12_POPTIC", "MPO 1x12 Parallel Optic"},
+            {0x0D, "MPO_2X16_POPTIC", "MPO 2x16 Parallel Optic"},
+            {0x20, "HSSDC_II",        "HSSDC II"},
+            {0x21, "COPPER_PIGTAIL",  "Copper pigtail"},
+            {0x22, "RJ45",            "RJ45"},
+            {0x23, "NONE",            "No separable connector"},
+            {0x24, "MXC_2X16",        "MXC 2x16"},
+            {0x25, "CS_OPTICAL",      "CS optical connector"},
+            {0x26, "MINI_CS_OPTICAL", "Mini CS optical connector"},
+            {0x27, "MPO_2X12_POPTIC", "MPO 2x12 Parallel Optic"},
+            {0x28, "MPO_1X16_POPTIC", "MPO 1x16 Parallel Optic"},
+        },
+    },
+    "SFF-8472 Rev. 11.4 table 3.5: Transceiver codes",
+    "10G Ethernet/IB compliance codes, byte 3",
+    {
+        name = "eth_10g",
+        description = "10G Ethernet/IB compliance",
+        bits = 8,
+        values = {
+            {0x80, "10G_BASE_ER",       "10G Base-ER"},
+            {0x40, "10G_BASE_LRM",      "10G Base-LRM"},
+            {0x20, "10G_BASE_LR",       "10G Base-LR"},
+            {0x10, "10G_BASE_SR",       "10G Base-SR"},
+            {0x08, "1X_SX",             "1X SX"},
+            {0x04, "1X_LX",             "1X LX"},
+            {0x02, "1X_COPPER_ACTIVE",  "1X Copper Active"},
+            {0x01, "1X_COPPER_PASSIVE", "1X Copper Passive"},
+        },
+    },
+    "Ethernet compliance codes, byte 6",
+    {
+        name = "eth",
+        description = "Ethernet compliance",
+        bits = 8,
+        values = {
+            {0x80, "BASE_PX",         "BASE-PX"},
+            {0x40, "BASE_BX10",       "BASE-BX10"},
+            {0x20, "100BASE_FX",      "100BASE-FX"},
+            {0x10, "100BASE_LX_LX10", "100BASE-LX/LX10"},
+            {0x08, "1000BASE_T",      "1000BASE-T"},
+            {0x04, "1000BASE_CX",     "1000BASE-CX"},
+            {0x02, "1000BASE_LX",     "1000BASE-LX"},
+            {0x01, "1000BASE_SX",     "1000BASE-SX"},
+        },
+    },
+    "FC link length, byte 7",
+    {
+        name = "fc_len",
+        description = "Fibre Channel link length",
+        bits = 8,
+        values = {
+            {0x80, "VERY_LONG",    "very long distance"},
+            {0x40, "SHORT",        "short distance"},
+            {0x20, "INTERMEDIATE", "intermediate distance"},
+            {0x10, "LONG",         "long distance"},
+            {0x08, "MEDIUM",       "medium distance"},
+        },
+    },
+    "Channel/Cable technology, byte 7-8",
+    {
+        name = "cab_tech",
+        description = "Channel/cable technology",
+        bits = 16,
+        values = {
+            {0x0400, "SA",       "Shortwave laser (SA)"},
+            {0x0200, "LC",       "Longwave laser (LC)"},
+            {0x0100, "EL_INTER", "Electrical inter-enclosure (EL)"},
+            {0x0080, "EL_INTRA", "Electrical intra-enclosure (EL)"},
+            {0x0040, "SN",       "Shortwave laser (SN)"},
+            {0x0020, "SL",       "Shortwave laser (SL)"},
+            {0x0010, "LL",       "Longwave laser (LL)"},
+            {0x0008, "ACTIVE",   "Active Cable"},
+            {0x0004, "PASSIVE",  "Passive Cable"},
+        },
+    },
+    "FC Transmission media, byte 9",
+    {
+        name = "fc_media",
+        description = "Fibre Channel transmission media",
+        bits = 8,
+        values = {
+            {0x80, "TW",       "Twin Axial Pair (TW)"},
+            {0x40, "TP",       "Twisted Pair (TP)"},
+            {0x20, "MI",       "Miniature Coax (MI)"},
+            {0x10, "TV",       "Video Coax (TV)"},
+            {0x08, "M6",       "Miltimode 62.5um (M6)"},
+            {0x04, "M5",       "Multimode 50um (M5)"},
+            {0x02, "RESERVED", "Reserved"},
+            {0x01, "SM",       "Single Mode (SM)"},
+        },
+    },
+    "FC Speed, byte 10",
+    {
+        name = "fc_speed",
+        description = "Fibre Channel speed",
+        bits = 8,
+        values = {
+            {0x80, "1200", "1200 MBytes/sec"},
+            {0x40, "800",  "800 MBytes/sec"},
+            {0x20, "1600", "1600 MBytes/sec"},
+            {0x10, "400",  "400 MBytes/sec"},
+            {0x08, "3200", "3200 MBytes/sec"},
+            {0x04, "200",  "200 MBytes/sec"},
+            {0x01, "100",  "100 MBytes/sec"},
+        },
+    },
+    "SFF-8436 Rev. 4.8 table 33: Specification compliance",
+    "10/40G Ethernet compliance codes, byte 128 + 3",
+    {
+        name = "eth_1040g",
+        description = "10/40G Ethernet compliance",
+        bits = 8,
+        values = {
+            {0x80, "EXTENDED",    "Extended"},
+            {0x40, "10GBASE_LRM", "10GBASE-LRM"},
+            {0x20, "10GBASE_LR",  "10GBASE-LR"},
+            {0x10, "10GBASE_SR",  "10GBASE-SR"},
+            {0x08, "40GBASE_CR4", "40GBASE-CR4"},
+            {0x04, "40GBASE_SR4", "40GBASE-SR4"},
+            {0x02, "40GBASE_LR4", "40GBASE-LR4"},
+            {0x01, "40G_ACTIVE",  "40G Active Cable"},
+        },
+    },
+    "SFF-8024 Rev. 4.6 table 4-4: Extended Specification Compliance",
+    {
+        name = "eth_ext",
+        description = "Extended specification compliance",
+        bits = 8,
+        values = {
+            {0xFF, "RESERVED_FF",             "Reserved"},
+            {0x55, "128GFC_LW",               "128GFC LW"},
+            {0x54, "128GFC_SW",               "128GFC SW"},
+            {0x53, "128GFC_EA",               "128GFC EA"},
+            {0x52, "64GFC_LW",                "64GFC LW"},
+            {0x51, "64GFC_SW",                "64GFC SW"},
+            {0x50, "64GFC_EA",                "64GFC EA"},
+            {0x4F, "RESERVED_4F",             "Reserved"},
+            {0x4E, "RESERVED_4E",             "Reserved"},
+            {0x4D, "RESERVED_4D",             "Reserved"},
+            {0x4C, "RESERVED_4C",             "Reserved"},
+            {0x4B, "RESERVED_4B",             "Reserved"},
+            {0x4A, "RESERVED_4A",             "Reserved"},
+            {0x49, "RESERVED_49",             "Reserved"},
+            {0x48, "RESERVED_48",             "Reserved"},
+            {0x47, "RESERVED_47",             "Reserved"},
+            {0x46, "200GBASE_LR4",            "200GBASE-LR4"},
+            {0x45, "50GBASE_LR",              "50GBASE-LR"},
+            {0x44, "200G_1550NM_PSM4",        "200G 1550nm PSM4"},
+            {0x43, "200GBASE_FR4",            "200GBASE-FR4"},
+            {0x42, "50GBASE_FR_200GBASE_DR4", "50GBASE-FR or 200GBASE-DR4"},
+            {0x41, "50GBASE_SR_100GBASE_SR2_200GBASE_SR4",
+                   "50GBASE-SR/100GBASE-SR2/200GBASE-SR4"},
+            {0x40, "50GBASE_CR_100GBASE_CR2_200GBASE_CR4",
+                   "50GBASE-CR/100GBASE-CR2/200GBASE-CR4"},
+            {0x3F, "RESERVED_3F",             "Reserved"},
+            {0x3E, "RESERVED_3E",             "Reserved"},
+            {0x3D, "RESERVED_3D",             "Reserved"},
+            {0x3C, "RESERVED_3C",             "Reserved"},
+            {0x3B, "RESERVED_3B",             "Reserved"},
+            {0x3A, "RESERVED_3A",             "Reserved"},
+            {0x39, "RESERVED_39",             "Reserved"},
+            {0x38, "RESERVED_38",             "Reserved"},
+            {0x37, "RESERVED_37",             "Reserved"},
+            {0x36, "RESERVED_36",             "Reserved"},
+            {0x35, "RESERVED_35",             "Reserved"},
+            {0x34, "RESERVED_34",             "Reserved"},
+            {0x33, "50_100_200GAUI_AOC_HI_BER",
+                   "50GAUI/100GAUI-2/200GAUI-4 AOC (BER <2.6e-4)"},
+            {0x32, "50_100_200GAUI_ACC_HI_BER",
+                   "50GAUI/100GAUI-2/200GAUI-4 ACC (BER <2.6e-4)"},
+            {0x31, "50_100_200GAUI_AOC_LO_BER",
+                   "50GAUI/100GAUI-2/200GAUI-4 AOC (BER <1e-6)"},
+            {0x30, "50_100_200GAUI_ACC_LO_BER",
+                   "50GAUI/100GAUI-2/200GAUI-4 ACC (BER <1e-6)"},
+            {0x2F, "RESERVED_2F",             "Reserved"},
+            {0x2E, "RESERVED_2E",             "Reserved"},
+            {0x2D, "RESERVED_2D",             "Reserved"},
+            {0x2C, "RESERVED_2C",             "Reserved"},
+            {0x2B, "RESERVED_2B",             "Reserved"},
+            {0x2A, "RESERVED_2A",             "Reserved"},
+            {0x29, "RESERVED_29",             "Reserved"},
+            {0x28, "RESERVED_28",             "Reserved"},
+            {0x27, "100G_LR",                 "100G-LR"},
+            {0x26, "100G_FR",                 "100G-FR"},
+            {0x25, "100GBASE_DR",             "100GBASE-DR"},
+            {0x24, "4WDM_40_MSA",             "4WDM-40 MSA"},
+            {0x23, "4WDM_20_MSA",             "4WDM-20 MSA"},
+            {0x22, "4WDM_10_MSA",             "4WDM-10 MSA"},
+            {0x21, "100G_PAM4_BIDI",          "100G PAM4 BiDi"},
+            {0x20, "100G_SWDM4",              "100G SWDM4"},
+            {0x1F, "40G_SWDM4",               "40G SWDM4"},
+            {0x1E, "2_5GBASE_T",              "2.5GBASE-T"},
+            {0x1D, "5GBASE_T",                "5GBASE-T"},
+            {0x1C, "10GBASE_T_SR",            "10GBASE-T Short Reach"},
+            {0x1B, "100G_1550NM_WDM",         "100G 1550nm WDM"},
+            {0x1A, "100GE_DWDM2",             "100GE-DWDM2"},
+            {0x19, "100G_25GAUI_C2M_ACC",     "100G ACC or 25GAUI C2M ACC"},
+            {0x18, "100G_25GAUI_C2M_AOC",     "100G AOC or 25GAUI C2M AOC"},
+            {0x17, "100G_CLR4",               "100G CLR4"},
+            {0x16, "10GBASE_T_SFI",
+                   "10GBASE-T with SFI electrical interface"},
+            {0x15, "G959_1_P1L1_2D2",         "G959.1 profile P1L1-2D2"},
+            {0x14, "G959_1_P1S1_2D2",         "G959.1 profile P1S1-2D2"},
+            {0x13, "G959_1_P1I1_2D1",         "G959.1 profile P1I1-2D1"},
+            {0x12, "40G_PSM4",                "40G PSM4 Parallel SMF"},
+            {0x11, "4X_10GBASE_SR",           "4 x 10GBASE-SR"},
+            {0x10, "40GBASE_ER4",             "40GBASE-ER4"},
+            {0x0F, "RESERVED_0F",             "Reserved"},
+            {0x0E, "RESERVED_0E",             "Reserved"},
+            {0x0D, "CA_25G_N",                "25GBASE-CR CA-25G-N"},
+            {0x0C, "CA_25G_S",                "25GBASE-CR CA-25G-S"},
+            {0x0B, "CA_L",                    "100GBASE-CR4 or 25GBASE-CR CA-L"},
+            {0x0A, "RESERVED_0A",             "Reserved"},
+            {0x09, "OBSOLETE",                "Obsolete"},
+            {0x08, "100G_25GAUI_C2M_ACC_1",
+                   "100G ACC (Active Copper Cable"},
+            {0x07, "100G_PSM4_P_SMF",         "100G PSM4 Parallel SMF"},
+            {0x06, "100G_CWDM4",              "100G CWDM4"},
+            {0x05, "100GBASE_SR10",           "100GBASE-SR10"},
+            {0x04, "100GBASE_ER4_25GBASE_ER", "100GBASE-ER4 or 25GBASE-ER"},
+            {0x03, "100GBASE_LR4_25GBASE_LR", "100GBASE-LR4 or 25GBASE-LR"},
+            {0x02, "100GBASE_SR4_25GBASE_SR", "100GBASE-SR4 or 25GBASE-SR"},
+            {0x01, "100G_25GAUI_C2M_AOC_1",
+                   "100G AOC (Active Optical Cable"},
+            {0x00, "UNSPECIFIED",             "Unspecified"},
+        },
+    },
+    "SFF-8636 Rev. 2.9 table 6.3: Revision compliance",
+    {
+        name = "rev",
+        description = "Revision compliance",
+        bits = 8,
+        values = {
+            {0x1, "SFF_8436_REV_LE_4_8",     "SFF-8436 rev <=4.8"},
+            {0x2, "SFF_8436_REV_LE_4_8_ALT", "SFF-8436 rev <=4.8"},
+            {0x3, "SFF_8636_REV_LE_1_3",     "SFF-8636 rev <=1.3"},
+            {0x4, "SFF_8636_REV_LE_1_4",     "SFF-8636 rev <=1.4"},
+            {0x5, "SFF_8636_REV_LE_1_5",     "SFF-8636 rev <=1.5"},
+            {0x6, "SFF_8636_REV_LE_2_0",     "SFF-8636 rev <=2.0"},
+            {0x7, "SFF_8636_REV_LE_2_7",     "SFF-8636 rev <=2.7"},
+            {0x8, "SFF_8363_REV_GE_2_8",     "SFF-8636 rev >=2.8"},
+            {0x0, "UNSPECIFIED",             "Unspecified"},
+        },
+    },
+}
+
+-- Nothing else in this context.
+})
--- a/release/arm64/RPI3.conf
+++ b/release/arm64/RPI3.conf
@ -4,7 +4,7 @@
 #

 DTB_DIR="/usr/local/share/rpi-firmware"
-DTB="bcm2710-rpi-3-b.dtb bcm2710-rpi-3-b-plus.dtb bcm2711-rpi-4-b.dtb"
+DTB="bcm2709-rpi-2-b.dtb bcm2710-rpi-3-b.dtb bcm2710-rpi-3-b-plus.dtb bcm2711-rpi-4-b.dtb"
 EMBEDDED_TARGET_ARCH="aarch64"
 EMBEDDED_TARGET="arm64"
 EMBEDDEDBUILD=1
--- a/rescue/rescue/Makefile
+++ b/rescue/rescue/Makefile
@ -224,6 +224,9 @@ CRUNCH_ALIAS_chown= chgrp
 ##################################################################
 CRUNCH_LIBS+= -lm

+CRUNCH_LIBS+=		${OBJTOP}/lib/libifconfig/libifconfig.a
+CRUNCH_BUILDOPTS+=	CRUNCH_CFLAGS+=-I${OBJTOP}/lib/libifconfig
+
 .if ${MK_ISCSI} != "no"
 CRUNCH_PROGS_usr.bin+=	iscsictl
 CRUNCH_PROGS_usr.sbin+=	iscsid
--- a/sbin/ifconfig/Makefile
+++ b/sbin/ifconfig/Makefile
@ -37,7 +37,8 @@ SRCS+=	ifgif.c			# GIF reversed header workaround
 SRCS+=	ifipsec.c		# IPsec VTI

 SRCS+=	sfp.c			# SFP/SFP+ information
-LIBADD+=	m
+LIBADD+=	ifconfig m util
+CFLAGS+=	-I${SRCTOP}/lib/libifconfig -I${OBJTOP}/lib/libifconfig

 .if ${MK_WIRELESS_SUPPORT} != "no"
 SRCS+=	ifieee80211.c		# SIOC[GS]IEEE80211 support
--- a/sbin/ifconfig/sfp.c
+++ b/sbin/ifconfig/sfp.c
--- a/sys/fs/devfs/devfs.h
+++ b/sys/fs/devfs/devfs.h
@ -192,6 +192,7 @@ char	*devfs_fqpn(char *, struct devfs_mount *, struct devfs_dirent *,
 	    struct componentname *);
 void	devfs_delete(struct devfs_mount *, struct devfs_dirent *, int);
 void	devfs_dirent_free(struct devfs_dirent *);
+int	devfs_populate_needed(struct devfs_mount *dm);
 void	devfs_populate(struct devfs_mount *);
 void	devfs_cleanup(struct devfs_mount *);
 void	devfs_unmount_final(struct devfs_mount *);
--- a/sys/fs/devfs/devfs_devs.c
+++ b/sys/fs/devfs/devfs_devs.c
@ -659,6 +659,13 @@ devfs_populate_loop(struct devfs_mount *dm, int cleanup)
 	return (0);
 }

+int
+devfs_populate_needed(struct devfs_mount *dm)
+{
+
+	return (dm->dm_generation != devfs_generation);
+}
+
 /*
 * The caller needs to hold the dm for the duration of the call.
 */
@ -668,9 +675,9 @@ devfs_populate(struct devfs_mount *dm)
 	unsigned gen;

 	sx_assert(&dm->dm_lock, SX_XLOCKED);
-	gen = devfs_generation;
-	if (dm->dm_generation == gen)
+	if (!devfs_populate_needed(dm))
 		return;
+	gen = devfs_generation;
 	while (devfs_populate_loop(dm, 0))
 		continue;
 	dm->dm_generation = gen;
--- a/sys/fs/devfs/devfs_vnops.c
+++ b/sys/fs/devfs/devfs_vnops.c
@ -235,6 +235,11 @@ devfs_populate_vp(struct vnode *vp)
 	ASSERT_VOP_LOCKED(vp, "devfs_populate_vp");

 	dmp = VFSTODEVFS(vp->v_mount);
+	if (!devfs_populate_needed(dmp)) {
+		sx_xlock(&dmp->dm_lock);
+		goto out_nopopulate;
+	}
+
 	locked = VOP_ISLOCKED(vp);

 	sx_xlock(&dmp->dm_lock);
@ -252,6 +257,7 @@ devfs_populate_vp(struct vnode *vp)
 		devfs_unmount_final(dmp);
 		return (ERESTART);
 	}
+out_nopopulate:
 	if (VN_IS_DOOMED(vp)) {
 		sx_xunlock(&dmp->dm_lock);
 		return (ERESTART);
@ -420,6 +426,7 @@ devfs_allocv(struct devfs_dirent *de, struct mount *mp, int lockmode,
 	struct cdev *dev;
 	struct devfs_mount *dmp;
 	struct cdevsw *dsw;
+	enum vgetstate vs;

 	dmp = VFSTODEVFS(mp);
 	if (de->de_flags & DE_DOOMED) {
@ -432,10 +439,10 @@ devfs_allocv(struct devfs_dirent *de, struct mount *mp, int lockmode,
 	mtx_lock(&devfs_de_interlock);
 	vp = de->de_vnode;
 	if (vp != NULL) {
-		VI_LOCK(vp);
+		vs = vget_prep(vp);
 		mtx_unlock(&devfs_de_interlock);
 		sx_xunlock(&dmp->dm_lock);
-		vget(vp, lockmode | LK_INTERLOCK | LK_RETRY, curthread);
+		vget_finish(vp, lockmode | LK_RETRY, vs);
 		sx_xlock(&dmp->dm_lock);
 		if (devfs_allocv_drop_refs(0, dmp, de)) {
 			vput(vp);
@ -1492,13 +1499,14 @@ devfs_revoke(struct vop_revoke_args *ap)
 	struct cdev *dev;
 	struct cdev_priv *cdp;
 	struct devfs_dirent *de;
+	enum vgetstate vs;
 	u_int i;

 	KASSERT((ap->a_flags & REVOKEALL) != 0, ("devfs_revoke !REVOKEALL"));

 	dev = vp->v_rdev;
 	cdp = cdev2priv(dev);
- 
+
 	dev_lock();
 	cdp->cdp_inuse++;
 	dev_unlock();
@ -1521,17 +1529,16 @@ devfs_revoke(struct vop_revoke_args *ap)
 			vp2 = de->de_vnode;
 			if (vp2 != NULL) {
 				dev_unlock();
-				VI_LOCK(vp2);
+				vs = vget_prep(vp2);
 				mtx_unlock(&devfs_de_interlock);
-				if (vget(vp2, LK_EXCLUSIVE | LK_INTERLOCK,
-				    curthread))
+				if (vget_finish(vp2, LK_EXCLUSIVE, vs) != 0)
 					goto loop;
 				vhold(vp2);
 				vgone(vp2);
 				vdrop(vp2);
 				vput(vp2);
 				break;
-			} 
+			}
 		}
 		if (vp2 != NULL) {
 			continue;
@ -1927,6 +1934,9 @@ static struct vop_vector devfs_vnodeops = {
 #endif
 	.vop_symlink =		devfs_symlink,
 	.vop_vptocnp =		devfs_vptocnp,
+	.vop_lock1 =		vop_lock,
+	.vop_unlock =		vop_unlock,
+	.vop_islocked =		vop_islocked,
 };
 VFS_VOP_VECTOR_REGISTER(devfs_vnodeops);

@ -1965,6 +1975,9 @@ static struct vop_vector devfs_specops = {
 	.vop_symlink =		VOP_PANIC,
 	.vop_vptocnp =		devfs_vptocnp,
 	.vop_write =		dead_write,
+	.vop_lock1 =		vop_lock,
+	.vop_unlock =		vop_unlock,
+	.vop_islocked =		vop_islocked,
 };
 VFS_VOP_VECTOR_REGISTER(devfs_specops);

--- a/sys/fs/nullfs/null_vnops.c
+++ b/sys/fs/nullfs/null_vnops.c
@ -182,6 +182,7 @@
 #include <sys/namei.h>
 #include <sys/sysctl.h>
 #include <sys/vnode.h>
+#include <sys/stat.h>

 #include <fs/nullfs/null.h>

@ -484,8 +485,20 @@ null_setattr(struct vop_setattr_args *ap)
 }

 /*
- *  We handle getattr only to change the fsid.
+ *  We handle stat and getattr only to change the fsid.
 */
+static int
+null_stat(struct vop_stat_args *ap)
+{
+	int error;
+
+	if ((error = null_bypass((struct vop_generic_args *)ap)) != 0)
+		return (error);
+
+	ap->a_sb->st_dev = ap->a_vp->v_mount->mnt_stat.f_fsid.val[0];
+	return (0);
+}
+
 static int
 null_getattr(struct vop_getattr_args *ap)
 {
@ -918,6 +931,7 @@ struct vop_vector null_vnodeops = {
 	.vop_accessx =		null_accessx,
 	.vop_advlockpurge =	vop_stdadvlockpurge,
 	.vop_bmap =		VOP_EOPNOTSUPP,
+	.vop_stat =		null_stat,
 	.vop_getattr =		null_getattr,
 	.vop_getwritemount =	null_getwritemount,
 	.vop_inactive =		null_inactive,
--- a/sys/fs/tmpfs/tmpfs_vfsops.c
+++ b/sys/fs/tmpfs/tmpfs_vfsops.c
@ -372,6 +372,13 @@ tmpfs_mount(struct mount *mp)
 		}
 		tmp->tm_nomtime = vfs_getopt(mp->mnt_optnew, "nomtime", NULL,
 		    0) == 0;
+		MNT_ILOCK(mp);
+		if ((mp->mnt_flag & MNT_UNION) == 0) {
+			mp->mnt_kern_flag |= MNTK_FPLOOKUP;
+		} else {
+			mp->mnt_kern_flag &= ~MNTK_FPLOOKUP;
+		}
+		MNT_IUNLOCK(mp);
 		return (0);
 	}

@ -462,7 +469,7 @@ tmpfs_mount(struct mount *mp)
 	mp->mnt_flag |= MNT_LOCAL;
 	mp->mnt_kern_flag |= MNTK_LOOKUP_SHARED | MNTK_EXTENDED_SHARED |
 	    MNTK_TEXT_REFS | MNTK_NOMSYNC;
-	if (!nonc)
+	if (!nonc && (mp->mnt_flag & MNT_UNION) == 0)
 		mp->mnt_kern_flag |= MNTK_FPLOOKUP;
 	MNT_IUNLOCK(mp);

--- a/sys/kern/vfs_cache.c
+++ b/sys/kern/vfs_cache.c
@ -159,6 +159,17 @@ struct	namecache_ts {
 * alignment for everyone. Note this is a nop for 64-bit platforms.
 */
 #define CACHE_ZONE_ALIGNMENT	UMA_ALIGNOF(time_t)
+#define	CACHE_PATH_CUTOFF	39
+
+#define CACHE_ZONE_SMALL_SIZE		(sizeof(struct namecache) + CACHE_PATH_CUTOFF + 1)
+#define CACHE_ZONE_SMALL_TS_SIZE	(sizeof(struct namecache_ts) + CACHE_PATH_CUTOFF + 1)
+#define CACHE_ZONE_LARGE_SIZE		(sizeof(struct namecache) + NAME_MAX + 1)
+#define CACHE_ZONE_LARGE_TS_SIZE	(sizeof(struct namecache_ts) + NAME_MAX + 1)
+
+_Static_assert((CACHE_ZONE_SMALL_SIZE % (CACHE_ZONE_ALIGNMENT + 1)) == 0, "bad zone size");
+_Static_assert((CACHE_ZONE_SMALL_TS_SIZE % (CACHE_ZONE_ALIGNMENT + 1)) == 0, "bad zone size");
+_Static_assert((CACHE_ZONE_LARGE_SIZE % (CACHE_ZONE_ALIGNMENT + 1)) == 0, "bad zone size");
+_Static_assert((CACHE_ZONE_LARGE_TS_SIZE % (CACHE_ZONE_ALIGNMENT + 1)) == 0, "bad zone size");

 #define	nc_vp		n_un.nu_vp
 #define	nc_neg		n_un.nu_neg
@ -339,8 +350,6 @@ static uma_zone_t __read_mostly cache_zone_small_ts;
 static uma_zone_t __read_mostly cache_zone_large;
 static uma_zone_t __read_mostly cache_zone_large_ts;

-#define	CACHE_PATH_CUTOFF	35
-
 static struct namecache *
 cache_alloc(int len, int ts)
 {
@ -1934,7 +1943,8 @@ cache_enter_time(struct vnode *dvp, struct vnode *vp, struct componentname *cnp,
 	}
 	len = ncp->nc_nlen = cnp->cn_namelen;
 	hash = cache_get_hash(cnp->cn_nameptr, len, dvp);
-	strlcpy(ncp->nc_name, cnp->cn_nameptr, len + 1);
+	memcpy(ncp->nc_name, cnp->cn_nameptr, len);
+	ncp->nc_name[len] = '\0';
 	cache_enter_lock(&cel, dvp, vp, hash);

 	/*
@ -2094,22 +2104,14 @@ nchinit(void *dummy __unused)
 {
 	u_int i;

-	cache_zone_small = uma_zcreate("S VFS Cache",
-	    sizeof(struct namecache) + CACHE_PATH_CUTOFF + 1,
-	    NULL, NULL, NULL, NULL, CACHE_ZONE_ALIGNMENT,
-	    UMA_ZONE_ZINIT);
-	cache_zone_small_ts = uma_zcreate("STS VFS Cache",
-	    sizeof(struct namecache_ts) + CACHE_PATH_CUTOFF + 1,
-	    NULL, NULL, NULL, NULL, CACHE_ZONE_ALIGNMENT,
-	    UMA_ZONE_ZINIT);
-	cache_zone_large = uma_zcreate("L VFS Cache",
-	    sizeof(struct namecache) + NAME_MAX + 1,
-	    NULL, NULL, NULL, NULL, CACHE_ZONE_ALIGNMENT,
-	    UMA_ZONE_ZINIT);
-	cache_zone_large_ts = uma_zcreate("LTS VFS Cache",
-	    sizeof(struct namecache_ts) + NAME_MAX + 1,
-	    NULL, NULL, NULL, NULL, CACHE_ZONE_ALIGNMENT,
-	    UMA_ZONE_ZINIT);
+	cache_zone_small = uma_zcreate("S VFS Cache", CACHE_ZONE_SMALL_SIZE,
+	    NULL, NULL, NULL, NULL, CACHE_ZONE_ALIGNMENT, UMA_ZONE_ZINIT);
+	cache_zone_small_ts = uma_zcreate("STS VFS Cache", CACHE_ZONE_SMALL_TS_SIZE,
+	    NULL, NULL, NULL, NULL, CACHE_ZONE_ALIGNMENT, UMA_ZONE_ZINIT);
+	cache_zone_large = uma_zcreate("L VFS Cache", CACHE_ZONE_LARGE_SIZE,
+	    NULL, NULL, NULL, NULL, CACHE_ZONE_ALIGNMENT, UMA_ZONE_ZINIT);
+	cache_zone_large_ts = uma_zcreate("LTS VFS Cache", CACHE_ZONE_LARGE_TS_SIZE,
+	    NULL, NULL, NULL, NULL, CACHE_ZONE_ALIGNMENT, UMA_ZONE_ZINIT);

 	VFS_SMR_ZONE_SET(cache_zone_small);
 	VFS_SMR_ZONE_SET(cache_zone_small_ts);
@ -3143,8 +3145,8 @@ cache_fpl_handled_impl(struct cache_fpl *fpl, int error, int line)
 #define cache_fpl_handled(x, e)	cache_fpl_handled_impl((x), (e), __LINE__)

 #define CACHE_FPL_SUPPORTED_CN_FLAGS \
-	(LOCKLEAF | LOCKPARENT | WANTPARENT | FOLLOW | LOCKSHARED | SAVENAME | \
-	 ISOPEN | NOMACCHECK | AUDITVNODE1 | AUDITVNODE2)
+	(LOCKLEAF | LOCKPARENT | WANTPARENT | NOCACHE | FOLLOW | LOCKSHARED | SAVENAME | \
+	 SAVESTART | WILLBEDIR | ISOPEN | NOMACCHECK | AUDITVNODE1 | AUDITVNODE2)

 #define CACHE_FPL_INTERNAL_CN_FLAGS \
 	(ISDOTDOT | MAKEENTRY | ISLASTCN)
@ -3194,10 +3196,6 @@ cache_can_fplookup(struct cache_fpl *fpl)
 		cache_fpl_aborted(fpl);
 		return (false);
 	}
-	if (cnp->cn_nameiop != LOOKUP) {
-		cache_fpl_aborted(fpl);
-		return (false);
-	}
 	if (ndp->ni_dirfd != AT_FDCWD) {
 		cache_fpl_aborted(fpl);
 		return (false);
@ -3407,6 +3405,22 @@ cache_fplookup_final_child(struct cache_fpl *fpl, enum vgetstate tvs)
 	return (cache_fpl_handled(fpl, 0));
 }

+/*
+ * They want to possibly modify the state of the namecache.
+ *
+ * Don't try to match the API contract, just leave.
+ * TODO: this leaves scalability on the table
+ */
+static int
+cache_fplookup_final_modifying(struct cache_fpl *fpl)
+{
+	struct componentname *cnp;
+
+	cnp = fpl->cnp;
+	MPASS(cnp->cn_nameiop != LOOKUP);
+	return (cache_fpl_partial(fpl));
+}
+
 static int __noinline
 cache_fplookup_final_withparent(struct cache_fpl *fpl)
 {
@ -3489,6 +3503,10 @@ cache_fplookup_final(struct cache_fpl *fpl)

 	VNPASS(cache_fplookup_vnode_supported(dvp), dvp);

+	if (cnp->cn_nameiop != LOOKUP) {
+		return (cache_fplookup_final_modifying(fpl));
+	}
+
 	if ((cnp->cn_flags & (LOCKPARENT|WANTPARENT)) != 0)
 		return (cache_fplookup_final_withparent(fpl));

@ -3633,6 +3651,12 @@ cache_fplookup_next(struct cache_fpl *fpl)
 	tvp = atomic_load_ptr(&ncp->nc_vp);
 	nc_flag = atomic_load_char(&ncp->nc_flag);
 	if ((nc_flag & NCF_NEGATIVE) != 0) {
+		/*
+		 * If they want to create an entry we need to replace this one.
+		 */
+		if (__predict_false(fpl->cnp->cn_nameiop != LOOKUP)) {
+			return (cache_fpl_partial(fpl));
+		}
 		negstate = NCP2NEGSTATE(ncp);
 		neg_hot = ((negstate->neg_flag & NEG_HOT) != 0);
 		if (__predict_false(!cache_ncp_canuse(ncp))) {
@ -3678,8 +3702,6 @@ cache_fplookup_mp_supported(struct mount *mp)
 		return (false);
 	if ((mp->mnt_kern_flag & MNTK_FPLOOKUP) == 0)
 		return (false);
-	if ((mp->mnt_flag & MNT_UNION) != 0)
-		return (false);
 	return (true);
 }

@ -3789,8 +3811,6 @@ cache_fplookup_parse(struct cache_fpl *fpl)
 	struct nameidata *ndp;
 	struct componentname *cnp;
 	char *cp;
-	char *prev_ni_next;             /* saved ndp->ni_next */
-	size_t prev_ni_pathlen;         /* saved ndp->ni_pathlen */

 	ndp = fpl->ndp;
 	cnp = fpl->cnp;
@ -3810,11 +3830,9 @@ cache_fplookup_parse(struct cache_fpl *fpl)
 		cache_fpl_smr_exit(fpl);
 		return (cache_fpl_handled(fpl, ENAMETOOLONG));
 	}
-	prev_ni_pathlen = ndp->ni_pathlen;
 	ndp->ni_pathlen -= cnp->cn_namelen;
 	KASSERT(ndp->ni_pathlen <= PATH_MAX,
 	    ("%s: ni_pathlen underflow to %zd\n", __func__, ndp->ni_pathlen));
-	prev_ni_next = ndp->ni_next;
 	ndp->ni_next = cp;

 	/*
@ -3938,7 +3956,7 @@ cache_fplookup_impl(struct vnode *dvp, struct cache_fpl *fpl)

 		VNPASS(cache_fplookup_vnode_supported(fpl->dvp), fpl->dvp);

-		error = VOP_FPLOOKUP_VEXEC(fpl->dvp, cnp->cn_cred, cnp->cn_thread);
+		error = VOP_FPLOOKUP_VEXEC(fpl->dvp, cnp->cn_cred);
 		if (__predict_false(error != 0)) {
 			error = cache_fplookup_failed_vexec(fpl, error);
 			break;
@ -4108,6 +4126,9 @@ cache_fplookup(struct nameidata *ndp, enum cache_fpl_status *status,
 	fpl.cnp = &ndp->ni_cnd;
 	MPASS(curthread == fpl.cnp->cn_thread);

+	if ((fpl.cnp->cn_flags & SAVESTART) != 0)
+		MPASS(fpl.cnp->cn_nameiop != LOOKUP);
+
 	if (!cache_can_fplookup(&fpl)) {
 		SDT_PROBE3(vfs, fplookup, lookup, done, ndp, fpl.line, fpl.status);
 		*status = fpl.status;
--- a/sys/kern/vfs_lookup.c
+++ b/sys/kern/vfs_lookup.c
@ -484,6 +484,9 @@ namei(struct nameidata *ndp)
 	    ("namei: nameiop contaminated with flags"));
 	KASSERT((cnp->cn_flags & OPMASK) == 0,
 	    ("namei: flags contaminated with nameiops"));
+	if (cnp->cn_flags & NOCACHE)
+		KASSERT(cnp->cn_nameiop != LOOKUP,
+		    ("%s: NOCACHE passed with LOOKUP", __func__));
 	MPASS(ndp->ni_startdir == NULL || ndp->ni_startdir->v_type == VDIR ||
 	    ndp->ni_startdir->v_type == VBAD);

--- a/sys/kern/vfs_subr.c
+++ b/sys/kern/vfs_subr.c
@ -408,7 +408,7 @@ sysctl_try_reclaim_vnode(SYSCTL_HANDLER_ARGS)

 	buf[req->newlen] = '\0';

-	ndflags = LOCKLEAF | NOFOLLOW | AUDITVNODE1 | NOCACHE | SAVENAME;
+	ndflags = LOCKLEAF | NOFOLLOW | AUDITVNODE1 | SAVENAME;
 	NDINIT(&nd, LOOKUP, ndflags, UIO_SYSSPACE, buf, curthread);
 	if ((error = namei(&nd)) != 0)
 		goto out;
--- a/sys/kern/vnode_if.src
+++ b/sys/kern/vnode_if.src
@ -153,7 +153,6 @@ vop_close {
 vop_fplookup_vexec {
 	IN struct vnode *vp;
 	IN struct ucred *cred;
-	IN struct thread *td;
 };


--- a/sys/netinet/in.c
+++ b/sys/netinet/in.c
@ -998,6 +998,13 @@ in_ifdetach(struct ifnet *ifp)
 	in_pcbpurgeif0(&V_ulitecbinfo, ifp);
 	in_purgemaddrs(ifp);
 	IN_MULTI_UNLOCK();
+
+	/*
+	 * Make sure all multicast deletions invoking if_ioctl() are
+	 * completed before returning. Else we risk accessing a freed
+	 * ifnet structure pointer.
+	 */
+	inm_release_wait(NULL);
 }

 /*
--- a/sys/netinet/in_mcast.c
+++ b/sys/netinet/in_mcast.c
@ -224,17 +224,37 @@ inm_is_ifp_detached(const struct in_multi *inm)
 }
 #endif

-static struct task free_task;
+/*
+ * Interface detach can happen in a taskqueue thread context, so we must use a
+ * dedicated thread to avoid deadlocks when draining inm_release tasks.
+ */
+TASKQUEUE_DEFINE_THREAD(inm_free);
+static struct task inm_free_task;
 static struct in_multi_head inm_free_list = SLIST_HEAD_INITIALIZER();
 static void inm_release_task(void *arg __unused, int pending __unused);

 static void
-inm_init(void)
+inm_init(void *arg __unused)
 {
-	TASK_INIT(&free_task, 0, inm_release_task, NULL);
+	TASK_INIT(&inm_free_task, 0, inm_release_task, NULL);
 }
 SYSINIT(inm_init, SI_SUB_TASKQ, SI_ORDER_ANY, inm_init, NULL);

+void
+inm_release_wait(void *arg __unused)
+{
+
+	/*
+	 * Make sure all pending multicast addresses are freed before
+	 * the VNET or network device is destroyed:
+	 */
+	taskqueue_drain(taskqueue_inm_free, &inm_free_task);
+}
+#ifdef VIMAGE
+/* XXX-BZ FIXME, see D24914. */
+VNET_SYSUNINIT(inm_release_wait, SI_SUB_PROTO_DOMAIN, SI_ORDER_FIRST, inm_release_wait, NULL);
+#endif
+
 void
 inm_release_list_deferred(struct in_multi_head *inmh)
 {
@ -244,7 +264,7 @@ inm_release_list_deferred(struct in_multi_head *inmh)
 	mtx_lock(&in_multi_free_mtx);
 	SLIST_CONCAT(&inm_free_list, inmh, in_multi, inm_nrele);
 	mtx_unlock(&in_multi_free_mtx);
-	taskqueue_enqueue(taskqueue_thread, &free_task);
+	taskqueue_enqueue(taskqueue_inm_free, &inm_free_task);
 }

 void
--- a/sys/netinet/in_var.h
+++ b/sys/netinet/in_var.h
@ -450,6 +450,7 @@ void	inm_print(const struct in_multi *);
 int	inm_record_source(struct in_multi *inm, const in_addr_t);
 void	inm_release_deferred(struct in_multi *);
 void	inm_release_list_deferred(struct in_multi_head *);
+void	inm_release_wait(void *);
 struct	in_multi *
 in_addmulti(struct in_addr *, struct ifnet *);
 int	in_joingroup(struct ifnet *, const struct in_addr *,
--- a/sys/netinet/tcp_syncache.c
+++ b/sys/netinet/tcp_syncache.c
@ -510,6 +510,9 @@ syncache_timer(void *xsch)
 				sch->sch_nextc = sc->sc_rxttime;
 			continue;
 		}
+		if (sc->sc_rxmits > V_tcp_ecn_maxretries) {
+			sc->sc_flags &= ~SCF_ECN;
+		}
 		if (sc->sc_rxmits > V_tcp_syncache.rexmt_limit) {
 			if ((s = tcp_log_addrs(&sc->sc_inc, NULL, NULL, NULL))) {
 				log(LOG_DEBUG, "%s; %s: Retransmits exhausted, "
@ -1505,6 +1508,13 @@ syncache_add(struct in_conninfo *inc, struct tcpopt *to, struct tcphdr *th,
 			sc->sc_tsreflect = to->to_tsval;
 		else
 			sc->sc_flags &= ~SCF_TIMESTAMP;
+		/*
+		 * Disable ECN if needed.
+		 */
+		if ((sc->sc_flags & SCF_ECN) &&
+		    ((th->th_flags & (TH_ECE|TH_CWR)) != (TH_ECE|TH_CWR))) {
+			sc->sc_flags &= ~SCF_ECN;
+		}
 #ifdef MAC
 		/*
 		 * Since we have already unconditionally allocated label
--- a/sys/netinet6/in6_ifattach.c
+++ b/sys/netinet6/in6_ifattach.c
@ -871,7 +871,7 @@ in6_purgemaddrs(struct ifnet *ifp)
 	 * completed before returning. Else we risk accessing a freed
 	 * ifnet structure pointer.
 	 */
-	in6m_release_wait();
+	in6m_release_wait(NULL);
 }

 void
--- a/sys/netinet6/in6_mcast.c
+++ b/sys/netinet6/in6_mcast.c
@ -521,7 +521,7 @@ static struct in6_multi_head in6m_free_list = SLIST_HEAD_INITIALIZER();
 static void in6m_release_task(void *arg __unused, int pending __unused);

 static void
-in6m_init(void)
+in6m_init(void *arg __unused)
 {
 	TASK_INIT(&in6m_free_task, 0, in6m_release_task, NULL);
 }
@ -539,10 +539,19 @@ in6m_release_list_deferred(struct in6_multi_head *inmh)
 }

 void
-in6m_release_wait(void)
+in6m_release_wait(void *arg __unused)
 {
+
+	/*
+	 * Make sure all pending multicast addresses are freed before
+	 * the VNET or network device is destroyed:
+	 */
 	taskqueue_drain_all(taskqueue_in6m_free);
 }
+#ifdef VIMAGE
+/* XXX-BZ FIXME, see D24914. */
+VNET_SYSUNINIT(in6m_release_wait, SI_SUB_PROTO_DOMAIN, SI_ORDER_FIRST, in6m_release_wait, NULL);
+#endif

 void
 in6m_disconnect_locked(struct in6_multi_head *inmh, struct in6_multi *inm)
--- a/sys/netinet6/in6_var.h
+++ b/sys/netinet6/in6_var.h
@ -870,7 +870,7 @@ void	in6m_commit(struct in6_multi *);
 void	in6m_print(const struct in6_multi *);
 int	in6m_record_source(struct in6_multi *, const struct in6_addr *);
 void	in6m_release_list_deferred(struct in6_multi_head *);
-void	in6m_release_wait(void);
+void	in6m_release_wait(void *);
 void	ip6_freemoptions(struct ip6_moptions *);
 int	ip6_getmoptions(struct inpcb *, struct sockopt *);
 int	ip6_setmoptions(struct inpcb *, struct sockopt *);
--- a/sys/sys/namei.h
+++ b/sys/sys/namei.h
@ -159,7 +159,6 @@ int	cache_fplookup(struct nameidata *ndp, enum cache_fpl_status *status,
 #define	ISWHITEOUT	0x00020000 /* found whiteout */
 #define	DOWHITEOUT	0x00040000 /* do whiteouts */
 #define	WILLBEDIR	0x00080000 /* new files will be dirs; allow trailing / */
-#define	ISUNICODE	0x00100000 /* current component name is unicode*/
 #define	ISOPEN		0x00200000 /* caller is opening; return a real vnode. */
 #define	NOCROSSMOUNT	0x00400000 /* do not cross mount points */
 #define	NOMACCHECK	0x00800000 /* do not perform MAC checks */
--- a/sys/ufs/ffs/ffs_vfsops.c
+++ b/sys/ufs/ffs/ffs_vfsops.c
@ -805,7 +805,7 @@ ffs_mount(struct mount *mp)
 	 */
 	if ((mp->mnt_kern_flag & MNTK_FPLOOKUP) != 0)
 		panic("MNTK_FPLOOKUP set on mount %p when it should not be", mp);
-	if ((mp->mnt_flag & (MNT_ACLS | MNT_NFS4ACLS)) == 0)
+	if ((mp->mnt_flag & (MNT_ACLS | MNT_NFS4ACLS | MNT_UNION)) == 0)
 		mp->mnt_kern_flag |= MNTK_FPLOOKUP;
 	MNT_IUNLOCK(mp);

--- a/tools/lua/template.lua
+++ b/tools/lua/template.lua
@ -0,0 +1,652 @@
+-- From lua-resty-template (modified to remove external dependencies)
+--[[
+Copyright (c) 2014 - 2020 Aapo Talvensaari
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice, this
+  list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright notice, this
+  list of conditions and the following disclaimer in the documentation and/or
+  other materials provided with the distribution.
+
+* Neither the name of the {organization} nor the names of its
+  contributors may be used to endorse or promote products derived from
+  this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+]]--
+-- $FreeBSD$
+
+local setmetatable = setmetatable
+local loadstring = loadstring
+local tostring = tostring
+local setfenv = setfenv
+local require = require
+local concat = table.concat
+local assert = assert
+local write = io.write
+local pcall = pcall
+local phase
+local open = io.open
+local load = load
+local type = type
+local dump = string.dump
+local find = string.find
+local gsub = string.gsub
+local byte = string.byte
+local null
+local sub = string.sub
+local var
+
+local _VERSION = _VERSION
+local _ENV = _ENV -- luacheck: globals _ENV
+local _G = _G
+
+local HTML_ENTITIES = {
+    ["&"] = "&amp;",
+    ["<"] = "&lt;",
+    [">"] = "&gt;",
+    ['"'] = "&quot;",
+    ["'"] = "&#39;",
+    ["/"] = "&#47;"
+}
+
+local CODE_ENTITIES = {
+    ["{"] = "&#123;",
+    ["}"] = "&#125;",
+    ["&"] = "&amp;",
+    ["<"] = "&lt;",
+    [">"] = "&gt;",
+    ['"'] = "&quot;",
+    ["'"] = "&#39;",
+    ["/"] = "&#47;"
+}
+
+local VAR_PHASES
+
+local ESC    = byte("\27")
+local NUL    = byte("\0")
+local HT     = byte("\t")
+local VT     = byte("\v")
+local LF     = byte("\n")
+local SOL    = byte("/")
+local BSOL   = byte("\\")
+local SP     = byte(" ")
+local AST    = byte("*")
+local NUM    = byte("#")
+local LPAR   = byte("(")
+local LSQB   = byte("[")
+local LCUB   = byte("{")
+local MINUS  = byte("-")
+local PERCNT = byte("%")
+
+local EMPTY  = ""
+
+local VIEW_ENV
+if _VERSION == "Lua 5.1" then
+    VIEW_ENV = { __index = function(t, k)
+        return t.context[k] or t.template[k] or _G[k]
+    end }
+else
+    VIEW_ENV = { __index = function(t, k)
+        return t.context[k] or t.template[k] or _ENV[k]
+    end }
+end
+
+local newtab
+do
+    local ok
+    ok, newtab = pcall(require, "table.new")
+    if not ok then newtab = function() return {} end end
+end
+
+local function enabled(val)
+    if val == nil then return true end
+    return val == true or (val == "1" or val == "true" or val == "on")
+end
+
+local function trim(s)
+    return gsub(gsub(s, "^%s+", EMPTY), "%s+$", EMPTY)
+end
+
+local function rpos(view, s)
+    while s > 0 do
+        local c = byte(view, s, s)
+        if c == SP or c == HT or c == VT or c == NUL then
+            s = s - 1
+        else
+            break
+        end
+    end
+    return s
+end
+
+local function escaped(view, s)
+    if s > 1 and byte(view, s - 1, s - 1) == BSOL then
+        if s > 2 and byte(view, s - 2, s - 2) == BSOL then
+            return false, 1
+        else
+            return true, 1
+        end
+    end
+    return false, 0
+end
+
+local function read_file(path)
+    local file, err = open(path, "rb")
+    if not file then return nil, err end
+    local content
+    content, err = file:read "*a"
+    file:close()
+    return content, err
+end
+
+local function load_view(template)
+    return function(view, plain)
+	if plain == true then return view end
+	local path, root = view, template.root
+	if root and root ~= EMPTY then
+	    if byte(root, -1) == SOL then root = sub(root, 1, -2) end
+	    if byte(view,  1) == SOL then path = sub(view, 2) end
+	    path = root .. "/" .. path
+	end
+	return plain == false and assert(read_file(path)) or read_file(path) or view
+    end
+end
+
+local function load_file(func)
+    return function(view) return func(view, false) end
+end
+
+local function load_string(func)
+    return function(view) return func(view, true) end
+end
+
+local function loader(template)
+    return function(view)
+	return assert(load(view, nil, nil, setmetatable({ template = template }, VIEW_ENV)))
+    end
+end
+
+local function visit(visitors, content, tag, name)
+    if not visitors then
+        return content
+    end
+
+    for i = 1, visitors.n do
+        content = visitors[i](content, tag, name)
+    end
+
+    return content
+end
+
+local function new(template, safe)
+    template = template or newtab(0, 26)
+
+    template._VERSION    = "2.0"
+    template.cache       = {}
+    template.load        = load_view(template)
+    template.load_file   = load_file(template.load)
+    template.load_string = load_string(template.load)
+    template.print       = write
+
+    local load_chunk = loader(template)
+
+    local caching
+    if VAR_PHASES and VAR_PHASES[phase()] then
+        caching = enabled(var.template_cache)
+    else
+        caching = true
+    end
+
+    local visitors
+    function template.visit(func)
+        if not visitors then
+            visitors = { func, n = 1 }
+            return
+        end
+        visitors.n = visitors.n + 1
+        visitors[visitors.n] = func
+    end
+
+    function template.caching(enable)
+        if enable ~= nil then caching = enable == true end
+        return caching
+    end
+
+    function template.output(s)
+        if s == nil or s == null then return EMPTY end
+        if type(s) == "function" then return template.output(s()) end
+        return tostring(s)
+    end
+
+    function template.escape(s, c)
+        if type(s) == "string" then
+            if c then return gsub(s, "[}{\">/<'&]", CODE_ENTITIES) end
+            return gsub(s, "[\">/<'&]", HTML_ENTITIES)
+        end
+        return template.output(s)
+    end
+
+    function template.new(view, layout)
+        local vt = type(view)
+
+        if vt == "boolean" then return new(nil,  view) end
+        if vt == "table"   then return new(view, safe) end
+        if vt == "nil"     then return new(nil,  safe) end
+
+        local render
+        local process
+        if layout then
+            if type(layout) == "table" then
+                render = function(self, context)
+                    context = context or self
+                    context.blocks = context.blocks or {}
+                    context.view = template.process(view, context)
+                    layout.blocks = context.blocks or {}
+                    layout.view = context.view or EMPTY
+                    layout:render()
+                end
+                process = function(self, context)
+                    context = context or self
+                    context.blocks = context.blocks or {}
+                    context.view = template.process(view, context)
+                    layout.blocks = context.blocks or {}
+                    layout.view = context.view
+                    return tostring(layout)
+                end
+            else
+                render = function(self, context)
+                    context = context or self
+                    context.blocks = context.blocks or {}
+                    context.view = template.process(view, context)
+                    template.render(layout, context)
+                end
+                process = function(self, context)
+                    context = context or self
+                    context.blocks = context.blocks or {}
+                    context.view = template.process(view, context)
+                    return template.process(layout, context)
+                end
+            end
+        else
+            render = function(self, context)
+                return template.render(view, context or self)
+            end
+            process = function(self, context)
+                return template.process(view, context or self)
+            end
+        end
+
+        if safe then
+            return setmetatable({
+                render = function(...)
+                    local ok, err = pcall(render, ...)
+                    if not ok then
+                        return nil, err
+                    end
+                end,
+                process = function(...)
+                    local ok, output = pcall(process, ...)
+                    if not ok then
+                        return nil, output
+                    end
+                    return output
+                end,
+             }, {
+                __tostring = function(...)
+                    local ok, output = pcall(process, ...)
+                    if not ok then
+                        return ""
+                    end
+                    return output
+            end })
+        end
+
+        return setmetatable({
+            render = render,
+            process = process
+        }, {
+            __tostring = process
+        })
+    end
+
+    function template.precompile(view, path, strip, plain)
+        local chunk = dump(template.compile(view, nil, plain), strip ~= false)
+        if path then
+            local file = open(path, "wb")
+            file:write(chunk)
+            file:close()
+        end
+        return chunk
+    end
+
+    function template.precompile_string(view, path, strip)
+        return template.precompile(view, path, strip, true)
+    end
+
+    function template.precompile_file(view, path, strip)
+        return template.precompile(view, path, strip, false)
+    end
+
+    function template.compile(view, cache_key, plain)
+        assert(view, "view was not provided for template.compile(view, cache_key, plain)")
+        if cache_key == "no-cache" then
+            return load_chunk(template.parse(view, plain)), false
+        end
+        cache_key = cache_key or view
+        local cache = template.cache
+        if cache[cache_key] then return cache[cache_key], true end
+        local func = load_chunk(template.parse(view, plain))
+        if caching then cache[cache_key] = func end
+        return func, false
+    end
+
+    function template.compile_file(view, cache_key)
+        return template.compile(view, cache_key, false)
+    end
+
+    function template.compile_string(view, cache_key)
+        return template.compile(view, cache_key, true)
+    end
+
+    function template.parse(view, plain)
+        assert(view, "view was not provided for template.parse(view, plain)")
+        if plain ~= true then
+            view = template.load(view, plain)
+            if byte(view, 1, 1) == ESC then return view end
+        end
+        local j = 2
+        local c = {[[
+context=... or {}
+local ___,blocks,layout={},blocks or {}
+local function include(v, c) return template.process(v, c or context) end
+local function echo(...) for i=1,select("#", ...) do ___[#___+1] = tostring(select(i, ...)) end end
+]] }
+        local i, s = 1, find(view, "{", 1, true)
+        while s do
+            local t, p = byte(view, s + 1, s + 1), s + 2
+            if t == LCUB then
+                local e = find(view, "}}", p, true)
+                if e then
+                    local z, w = escaped(view, s)
+                    if i < s - w then
+                        c[j] = "___[#___+1]=[=[\n"
+                        c[j+1] = visit(visitors, sub(view, i, s - 1 - w))
+                        c[j+2] = "]=]\n"
+                        j=j+3
+                    end
+                    if z then
+                        i = s
+                    else
+                        c[j] = "___[#___+1]=template.escape("
+                        c[j+1] = visit(visitors, trim(sub(view, p, e - 1)), "{")
+                        c[j+2] = ")\n"
+                        j=j+3
+                        s, i = e + 1, e + 2
+                    end
+                end
+            elseif t == AST then
+                local e = find(view, "*}", p, true)
+                if e then
+                    local z, w = escaped(view, s)
+                    if i < s - w then
+                        c[j] = "___[#___+1]=[=[\n"
+                        c[j+1] = visit(visitors, sub(view, i, s - 1 - w))
+                        c[j+2] = "]=]\n"
+                        j=j+3
+                    end
+                    if z then
+                        i = s
+                    else
+                        c[j] = "___[#___+1]=template.output("
+                        c[j+1] = visit(visitors, trim(sub(view, p, e - 1)), "*")
+                        c[j+2] = ")\n"
+                        j=j+3
+                        s, i = e + 1, e + 2
+                    end
+                end
+            elseif t == PERCNT then
+                local e = find(view, "%}", p, true)
+                if e then
+                    local z, w = escaped(view, s)
+                    if z then
+                        if i < s - w then
+                            c[j] = "___[#___+1]=[=[\n"
+                            c[j+1] = visit(visitors, sub(view, i, s - 1 - w))
+                            c[j+2] = "]=]\n"
+                            j=j+3
+                        end
+                        i = s
+                    else
+                        local n = e + 2
+                        if byte(view, n, n) == LF then
+                            n = n + 1
+                        end
+                        local r = rpos(view, s - 1)
+                        if i <= r then
+                            c[j] = "___[#___+1]=[=[\n"
+                            c[j+1] = visit(visitors, sub(view, i, r))
+                            c[j+2] = "]=]\n"
+                            j=j+3
+                        end
+                        c[j] = visit(visitors, trim(sub(view, p, e - 1)), "%")
+                        c[j+1] = "\n"
+                        j=j+2
+                        s, i = n - 1, n
+                    end
+                end
+            elseif t == LPAR then
+                local e = find(view, ")}", p, true)
+                if e then
+                    local z, w = escaped(view, s)
+                    if i < s - w then
+                        c[j] = "___[#___+1]=[=[\n"
+                        c[j+1] = visit(visitors, sub(view, i, s - 1 - w))
+                        c[j+2] = "]=]\n"
+                        j=j+3
+                    end
+                    if z then
+                        i = s
+                    else
+                        local f = visit(visitors, sub(view, p, e - 1), "(")
+                        local x = find(f, ",", 2, true)
+                        if x then
+                            c[j] = "___[#___+1]=include([=["
+                            c[j+1] = trim(sub(f, 1, x - 1))
+                            c[j+2] = "]=],"
+                            c[j+3] = trim(sub(f, x + 1))
+                            c[j+4] = ")\n"
+                            j=j+5
+                        else
+                            c[j] = "___[#___+1]=include([=["
+                            c[j+1] = trim(f)
+                            c[j+2] = "]=])\n"
+                            j=j+3
+                        end
+                        s, i = e + 1, e + 2
+                    end
+                end
+            elseif t == LSQB then
+                local e = find(view, "]}", p, true)
+                if e then
+                    local z, w = escaped(view, s)
+                    if i < s - w then
+                        c[j] = "___[#___+1]=[=[\n"
+                        c[j+1] = visit(visitors, sub(view, i, s - 1 - w))
+                        c[j+2] = "]=]\n"
+                        j=j+3
+                    end
+                    if z then
+                        i = s
+                    else
+                        c[j] = "___[#___+1]=include("
+                        c[j+1] = visit(visitors, trim(sub(view, p, e - 1)), "[")
+                        c[j+2] = ")\n"
+                        j=j+3
+                        s, i = e + 1, e + 2
+                    end
+                end
+            elseif t == MINUS then
+                local e = find(view, "-}", p, true)
+                if e then
+                    local x, y = find(view, sub(view, s, e + 1), e + 2, true)
+                    if x then
+                        local z, w = escaped(view, s)
+                        if z then
+                            if i < s - w then
+                                c[j] = "___[#___+1]=[=[\n"
+                                c[j+1] = visit(visitors, sub(view, i, s - 1 - w))
+                                c[j+2] = "]=]\n"
+                                j=j+3
+                            end
+                            i = s
+                        else
+                            y = y + 1
+                            x = x - 1
+                            if byte(view, y, y) == LF then
+                                y = y + 1
+                            end
+                            local b = trim(sub(view, p, e - 1))
+                            if b == "verbatim" or b == "raw" then
+                                if i < s - w then
+                                    c[j] = "___[#___+1]=[=[\n"
+                                    c[j+1] = visit(visitors, sub(view, i, s - 1 - w))
+                                    c[j+2] = "]=]\n"
+                                    j=j+3
+                                end
+                                c[j] = "___[#___+1]=[=["
+                                c[j+1] = visit(visitors, sub(view, e + 2, x))
+                                c[j+2] = "]=]\n"
+                                j=j+3
+                            else
+                                if byte(view, x, x) == LF then
+                                    x = x - 1
+                                end
+                                local r = rpos(view, s - 1)
+                                if i <= r then
+                                    c[j] = "___[#___+1]=[=[\n"
+                                    c[j+1] = visit(visitors, sub(view, i, r))
+                                    c[j+2] = "]=]\n"
+                                    j=j+3
+                                end
+                                c[j] = 'blocks["'
+                                c[j+1] = b
+                                c[j+2] = '"]=include[=['
+                                c[j+3] = visit(visitors, sub(view, e + 2, x), "-", b)
+                                c[j+4] = "]=]\n"
+                                j=j+5
+                            end
+                            s, i = y - 1, y
+                        end
+                    end
+                end
+            elseif t == NUM then
+                local e = find(view, "#}", p, true)
+                if e then
+                    local z, w = escaped(view, s)
+                    if i < s - w then
+                        c[j] = "___[#___+1]=[=[\n"
+                        c[j+1] = visit(visitors, sub(view, i, s - 1 - w))
+                        c[j+2] = "]=]\n"
+                        j=j+3
+                    end
+                    if z then
+                        i = s
+                    else
+                        e = e + 2
+                        if byte(view, e, e) == LF then
+                            e = e + 1
+                        end
+                        s, i = e - 1, e
+                    end
+                end
+            end
+            s = find(view, "{", s + 1, true)
+        end
+        s = sub(view, i)
+        if s and s ~= EMPTY then
+            c[j] = "___[#___+1]=[=[\n"
+            c[j+1] = visit(visitors, s)
+            c[j+2] = "]=]\n"
+            j=j+3
+        end
+        c[j] = "return layout and include(layout,setmetatable({view=table.concat(___),blocks=blocks},{__index=context})) or table.concat(___)" -- luacheck: ignore
+        return concat(c)
+    end
+
+    function template.parse_file(view)
+        return template.parse(view, false)
+    end
+
+    function template.parse_string(view)
+        return template.parse(view, true)
+    end
+
+    function template.process(view, context, cache_key, plain)
+        assert(view, "view was not provided for template.process(view, context, cache_key, plain)")
+        return template.compile(view, cache_key, plain)(context)
+    end
+
+    function template.process_file(view, context, cache_key)
+        assert(view, "view was not provided for template.process_file(view, context, cache_key)")
+        return template.compile(view, cache_key, false)(context)
+    end
+
+    function template.process_string(view, context, cache_key)
+        assert(view, "view was not provided for template.process_string(view, context, cache_key)")
+        return template.compile(view, cache_key, true)(context)
+    end
+
+    function template.render(view, context, cache_key, plain)
+        assert(view, "view was not provided for template.render(view, context, cache_key, plain)")
+        template.print(template.process(view, context, cache_key, plain))
+    end
+
+    function template.render_file(view, context, cache_key)
+        assert(view, "view was not provided for template.render_file(view, context, cache_key)")
+        template.render(view, context, cache_key, false)
+    end
+
+    function template.render_string(view, context, cache_key)
+        assert(view, "view was not provided for template.render_string(view, context, cache_key)")
+        template.render(view, context, cache_key, true)
+    end
+
+    if safe then
+        return setmetatable({}, {
+            __index = function(_, k)
+                if type(template[k]) == "function" then
+                    return function(...)
+                        local ok, a, b = pcall(template[k], ...)
+                        if not ok then
+                            return nil, a
+                        end
+                        return a, b
+                    end
+                end
+                return template[k]
+            end,
+            __new_index = function(_, k, v)
+                template[k] = v
+            end,
+        })
+    end
+
+    return template
+end
+
+return new()
--- a/usr.bin/calendar/calendars/calendar.history
+++ b/usr.bin/calendar/calendars/calendar.history
@ -408,7 +408,6 @@
 08/06	Caricom in Barbados
 08/06	Cy Young pitches first game, 1890
 08/07	Jack the Ripper makes his first kill, 1888
-08/08	Atomic bomb dropped on Nagasaki, 1945
 08/08	Montenegro declares war on Germany, 1914
 08/08	Richard Nixon resigns the US presidency, 1974
 08/08	The Great Train Robbery -- $7,368,000, 1963
--- a/usr.bin/calendar/calendars/de_DE.ISO8859-1/calendar.geschichte
+++ b/usr.bin/calendar/calendars/de_DE.ISO8859-1/calendar.geschichte
@ -104,7 +104,7 @@ LANG=de_DE.ISO8859-1
 10/01	Verkündigung der Urteile im Nürnberger Hauptkriegsverbrecherprozeß, 1946
 02/25	Auflösung der Landes Preußen durch den Kontrollrat, 1947
 08/06	Erster Atombombenabwurf auf Hiroshima, 1945
-08/08	Atombombenabwurf auf Nagasaki, 1945
+08/09	Atombombenabwurf auf Nagasaki, 1945
 04/19	Aufstand im Warschauer Ghetto, 1943
 12/07	Japan bombardiert Pearl Harbor, 1941

--- a/usr.bin/uname/uname.1
+++ b/usr.bin/uname/uname.1
@ -28,7 +28,7 @@
 .\"	@(#)uname.1	8.3 (Berkeley) 4/8/94
 .\" $FreeBSD$
 .\"
-.Dd June 27, 2019
+.Dd August 10, 2020
 .Dt UNAME 1
 .Os
 .Sh NAME
@ -107,6 +107,9 @@ and
 flags are intended to be used for fine grain differentiation of incremental
 .Fx
 development and user visible changes.
+Note that when both of these two options are specified, regardless of their
+order, the kernel version would be printed first, followed by the user
+environment version.
 .Sh ENVIRONMENT
 An environment variable composed of the string
 .Ev UNAME_