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freebsd-dev/sys/modules/Makefile
John Baldwin b2e60773c6 Add kernel-side support for in-kernel TLS. 
KTLS adds support for in-kernel framing and encryption of Transport
Layer Security (1.0-1.2) data on TCP sockets.  KTLS only supports
offload of TLS for transmitted data.  Key negotation must still be
performed in userland.  Once completed, transmit session keys for a
connection are provided to the kernel via a new TCP_TXTLS_ENABLE
socket option.  All subsequent data transmitted on the socket is
placed into TLS frames and encrypted using the supplied keys.

Any data written to a KTLS-enabled socket via write(2), aio_write(2),
or sendfile(2) is assumed to be application data and is encoded in TLS
frames with an application data type.  Individual records can be sent
with a custom type (e.g. handshake messages) via sendmsg(2) with a new
control message (TLS_SET_RECORD_TYPE) specifying the record type.

At present, rekeying is not supported though the in-kernel framework
should support rekeying.

KTLS makes use of the recently added unmapped mbufs to store TLS
frames in the socket buffer.  Each TLS frame is described by a single
ext_pgs mbuf.  The ext_pgs structure contains the header of the TLS
record (and trailer for encrypted records) as well as references to
the associated TLS session.

KTLS supports two primary methods of encrypting TLS frames: software
TLS and ifnet TLS.

Software TLS marks mbufs holding socket data as not ready via
M_NOTREADY similar to sendfile(2) when TLS framing information is
added to an unmapped mbuf in ktls_frame().  ktls_enqueue() is then
called to schedule TLS frames for encryption.  In the case of
sendfile_iodone() calls ktls_enqueue() instead of pru_ready() leaving
the mbufs marked M_NOTREADY until encryption is completed.  For other
writes (vn_sendfile when pages are available, write(2), etc.), the
PRUS_NOTREADY is set when invoking pru_send() along with invoking
ktls_enqueue().

A pool of worker threads (the "KTLS" kernel process) encrypts TLS
frames queued via ktls_enqueue().  Each TLS frame is temporarily
mapped using the direct map and passed to a software encryption
backend to perform the actual encryption.

(Note: The use of PHYS_TO_DMAP could be replaced with sf_bufs if
someone wished to make this work on architectures without a direct
map.)

KTLS supports pluggable software encryption backends.  Internally,
Netflix uses proprietary pure-software backends.  This commit includes
a simple backend in a new ktls_ocf.ko module that uses the kernel's
OpenCrypto framework to provide AES-GCM encryption of TLS frames.  As
a result, software TLS is now a bit of a misnomer as it can make use
of hardware crypto accelerators.

Once software encryption has finished, the TLS frame mbufs are marked
ready via pru_ready().  At this point, the encrypted data appears as
regular payload to the TCP stack stored in unmapped mbufs.

ifnet TLS permits a NIC to offload the TLS encryption and TCP
segmentation.  In this mode, a new send tag type (IF_SND_TAG_TYPE_TLS)
is allocated on the interface a socket is routed over and associated
with a TLS session.  TLS records for a TLS session using ifnet TLS are
not marked M_NOTREADY but are passed down the stack unencrypted.  The
ip_output_send() and ip6_output_send() helper functions that apply
send tags to outbound IP packets verify that the send tag of the TLS
record matches the outbound interface.  If so, the packet is tagged
with the TLS send tag and sent to the interface.  The NIC device
driver must recognize packets with the TLS send tag and schedule them
for TLS encryption and TCP segmentation.  If the the outbound
interface does not match the interface in the TLS send tag, the packet
is dropped.  In addition, a task is scheduled to refresh the TLS send
tag for the TLS session.  If a new TLS send tag cannot be allocated,
the connection is dropped.  If a new TLS send tag is allocated,
however, subsequent packets will be tagged with the correct TLS send
tag.  (This latter case has been tested by configuring both ports of a
Chelsio T6 in a lagg and failing over from one port to another.  As
the connections migrated to the new port, new TLS send tags were
allocated for the new port and connections resumed without being
dropped.)

ifnet TLS can be enabled and disabled on supported network interfaces
via new '[-]txtls[46]' options to ifconfig(8).  ifnet TLS is supported
across both vlan devices and lagg interfaces using failover, lacp with
flowid enabled, or lacp with flowid enabled.

Applications may request the current KTLS mode of a connection via a
new TCP_TXTLS_MODE socket option.  They can also use this socket
option to toggle between software and ifnet TLS modes.

In addition, a testing tool is available in tools/tools/switch_tls.
This is modeled on tcpdrop and uses similar syntax.  However, instead
of dropping connections, -s is used to force KTLS connections to
switch to software TLS and -i is used to switch to ifnet TLS.

Various sysctls and counters are available under the kern.ipc.tls
sysctl node.  The kern.ipc.tls.enable node must be set to true to
enable KTLS (it is off by default).  The use of unmapped mbufs must
also be enabled via kern.ipc.mb_use_ext_pgs to enable KTLS.

KTLS is enabled via the KERN_TLS kernel option.

This patch is the culmination of years of work by several folks
including Scott Long and Randall Stewart for the original design and
implementation; Drew Gallatin for several optimizations including the
use of ext_pgs mbufs, the M_NOTREADY mechanism for TLS records
awaiting software encryption, and pluggable software crypto backends;
and John Baldwin for modifications to support hardware TLS offload.

Reviewed by:	gallatin, hselasky, rrs
Obtained from:	Netflix
Sponsored by:	Netflix, Chelsio Communications
Differential Revision:	https://reviews.freebsd.org/D21277
2019-08-27 00:01:56 +00:00

807 lines
12 KiB
Makefile
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# $FreeBSD$
SYSDIR?=${SRCTOP}/sys
.include "${SYSDIR}/conf/kern.opts.mk"
SUBDIR_PARALLEL=
# Modules that include binary-only blobs of microcode should be selectable by
# MK_SOURCELESS_UCODE option (see below).
.if defined(MODULES_OVERRIDE) && !defined(ALL_MODULES)
SUBDIR=${MODULES_OVERRIDE}
.else
SUBDIR= \
${_3dfx} \
${_3dfx_linux} \
${_aac} \
${_aacraid} \
accf_data \
accf_dns \
accf_http \
acl_nfs4 \
acl_posix1e \
${_acpi} \
ae \
${_aesni} \
age \
${_agp} \
ahci \
aic7xxx \
alc \
ale \
alq \
${_amd_ecc_inject} \
${_amdgpio} \
${_amdsbwd} \
${_amdsmn} \
${_amdtemp} \
amr \
${_an} \
${_aout} \
${_apm} \
${_arcmsr} \
${_allwinner} \
${_armv8crypto} \
${_asmc} \
ata \
ath \
ath_dfs \
ath_hal \
ath_hal_ar5210 \
ath_hal_ar5211 \
ath_hal_ar5212 \
ath_hal_ar5416 \
ath_hal_ar9300 \
ath_main \
ath_rate \
ath_pci \
${_autofs} \
${_auxio} \
${_bce} \
${_bcm283x_clkman} \
${_bcm283x_pwm} \
bfe \
bge \
bhnd \
${_bxe} \
${_bios} \
${_bktr} \
${_blake2} \
bnxt \
bridgestp \
bwi \
bwn \
${_bytgpio} \
${_chvgpio} \
cam \
${_cardbus} \
${_carp} \
cas \
${_cbb} \
cc \
${_ccp} \
cd9660 \
cd9660_iconv \
${_ce} \
${_cfi} \
${_chromebook_platform} \
${_ciss} \
cloudabi \
${_cloudabi32} \
${_cloudabi64} \
${_cmx} \
${_coretemp} \
${_cp} \
${_cpsw} \
${_cpuctl} \
${_cpufreq} \
${_crypto} \
${_cryptodev} \
${_ctau} \
ctl \
${_cxgb} \
${_cxgbe} \
dc \
dcons \
dcons_crom \
${_dpms} \
dummynet \
${_efirt} \
${_em} \
${_ena} \
${_epic} \
esp \
${_et} \
evdev \
${_exca} \
ext2fs \
fdc \
fdescfs \
${_ffec} \
filemon \
firewire \
firmware \
fusefs \
${_fxp} \
gem \
geom \
${_glxiic} \
${_glxsb} \
gpio \
hifn \
hme \
${_hpt27xx} \
${_hptiop} \
${_hptmv} \
${_hptnr} \
${_hptrr} \
hwpmc \
${_hwpmc_mips24k} \
${_hwpmc_mips74k} \
${_hyperv} \
i2c \
${_iavf} \
${_ibcore} \
${_ichwd} \
${_ida} \
if_bridge \
if_disc \
if_edsc \
${_if_enc} \
if_epair \
${_if_gif} \
${_if_gre} \
${_if_me} \
if_lagg \
${_if_ndis} \
${_if_stf} \
if_tuntap \
if_vlan \
if_vxlan \
iflib \
${_iir} \
imgact_binmisc \
${_intelspi} \
${_io} \
${_ioat} \
${_ipoib} \
${_ipdivert} \
${_ipfilter} \
${_ipfw} \
ipfw_nat \
${_ipfw_nat64} \
${_ipfw_nptv6} \
${_ipfw_pmod} \
${_ipmi} \
ip6_mroute_mod \
ip_mroute_mod \
${_ips} \
${_ipsec} \
${_ipw} \
${_ipwfw} \
${_isci} \
${_iser} \
isp \
${_ispfw} \
${_iwi} \
${_iwifw} \
${_iwm} \
${_iwmfw} \
${_iwn} \
${_iwnfw} \
${_ix} \
${_ixv} \
${_ixl} \
jme \
kbdmux \
kgssapi \
kgssapi_krb5 \
khelp \
krpc \
ksyms \
${_ktls_ocf} \
le \
lge \
libalias \
libiconv \
libmchain \
lindebugfs \
${_linux} \
${_linux_common} \
${_linux64} \
linuxkpi \
${_lio} \
lpt \
mac_biba \
mac_bsdextended \
mac_ifoff \
mac_lomac \
mac_mls \
mac_none \
mac_ntpd \
mac_partition \
mac_portacl \
mac_seeotheruids \
mac_stub \
mac_test \
malo \
md \
mdio \
mem \
mfi \
mii \
mlx \
mlxfw \
${_mlx4} \
${_mlx4ib} \
${_mlx4en} \
${_mlx5} \
${_mlx5en} \
${_mlx5ib} \
${_mly} \
mmc \
mmcsd \
${_mpr} \
${_mps} \
mpt \
mqueue \
mrsas \
msdosfs \
msdosfs_iconv \
msk \
${_mthca} \
mvs \
mwl \
${_mwlfw} \
mxge \
my \
${_nctgpio} \
${_ndis} \
${_netgraph} \
${_nfe} \
nfscl \
nfscommon \
nfsd \
nfslock \
nfslockd \
nfssvc \
nge \
nmdm \
nullfs \
${_ntb} \
${_nvd} \
${_nvdimm} \
${_nvme} \
${_nvram} \
oce \
${_ocs_fc} \
otus \
${_otusfw} \
ow \
${_padlock} \
${_padlock_rng} \
${_pccard} \
${_pcfclock} \
${_pf} \
${_pflog} \
${_pfsync} \
plip \
${_pms} \
ppbus \
ppc \
ppi \
pps \
procfs \
proto \
pseudofs \
${_pst} \
pty \
puc \
pwm \
${_qlxge} \
${_qlxgb} \
${_qlxgbe} \
${_qlnx} \
ral \
${_ralfw} \
${_random_fortuna} \
${_random_other} \
rc4 \
${_rdma} \
${_rdrand_rng} \
re \
rl \
${_rockchip} \
rtwn \
rtwn_pci \
rtwn_usb \
${_rtwnfw} \
${_s3} \
${_safe} \
${_sbni} \
scc \
sdhci \
${_sdhci_acpi} \
sdhci_pci \
sdio \
sem \
send \
${_sfxge} \
sge \
${_sgx} \
${_sgx_linux} \
siftr \
siis \
sis \
sk \
${_smartpqi} \
smbfs \
snp \
sound \
${_speaker} \
spi \
${_splash} \
${_sppp} \
ste \
stge \
${_superio} \
${_sym} \
${_syscons} \
sysvipc \
tcp \
${_ti} \
tmpfs \
${_toecore} \
${_tpm} \
trm \
${_twa} \
twe \
tws \
uart \
ubsec \
udf \
udf_iconv \
ufs \
uinput \
unionfs \
usb \
${_vesa} \
${_virtio} \
vge \
${_viawd} \
videomode \
vkbd \
${_vmm} \
${_vmware} \
${_vpo} \
vr \
vte \
${_wbwd} \
${_wi} \
wlan \
wlan_acl \
wlan_amrr \
wlan_ccmp \
wlan_rssadapt \
wlan_tkip \
wlan_wep \
wlan_xauth \
${_wpi} \
${_wpifw} \
${_x86bios} \
xl \
xz \
zlib
.if ${MK_AUTOFS} != "no" || defined(ALL_MODULES)
_autofs= autofs
.endif
.if ${MK_CDDL} != "no" || defined(ALL_MODULES)
.if (${MACHINE_CPUARCH} != "arm" || ${MACHINE_ARCH:Marmv[67]*} != "") && \
${MACHINE_CPUARCH} != "mips" && \
${MACHINE_CPUARCH} != "sparc64"
SUBDIR+= dtrace
.endif
SUBDIR+= opensolaris
.endif
.if ${MK_CRYPT} != "no" || defined(ALL_MODULES)
.if exists(${SRCTOP}/sys/opencrypto)
_crypto= crypto
_cryptodev= cryptodev
_random_fortuna=random_fortuna
_random_other= random_other
_ktls_ocf= ktls_ocf
.endif
.endif
.if ${MK_CUSE} != "no" || defined(ALL_MODULES)
SUBDIR+= cuse
.endif
.if (${MK_INET_SUPPORT} != "no" || ${MK_INET6_SUPPORT} != "no") || \
defined(ALL_MODULES)
_carp= carp
_toecore= toecore
_if_enc= if_enc
_if_gif= if_gif
_if_gre= if_gre
_ipfw_pmod= ipfw_pmod
.if ${MK_IPSEC_SUPPORT} != "no"
_ipsec= ipsec
.endif
.endif
.if (${MK_INET_SUPPORT} != "no" && ${MK_INET6_SUPPORT} != "no") || \
defined(ALL_MODULES)
_if_stf= if_stf
.endif
.if ${MK_INET_SUPPORT} != "no" || defined(ALL_MODULES)
_if_me= if_me
_ipdivert= ipdivert
_ipfw= ipfw
.if ${MK_INET6_SUPPORT} != "no" || defined(ALL_MODULES)
_ipfw_nat64= ipfw_nat64
.endif
.endif
.if ${MK_INET6_SUPPORT} != "no" || defined(ALL_MODULES)
_ipfw_nptv6= ipfw_nptv6
.endif
.if ${MK_IPFILTER} != "no" || defined(ALL_MODULES)
_ipfilter= ipfilter
.endif
.if ${MK_ISCSI} != "no" || defined(ALL_MODULES)
SUBDIR+= cfiscsi
SUBDIR+= iscsi
SUBDIR+= iscsi_initiator
.endif
.if !empty(OPT_FDT)
SUBDIR+= fdt
.endif
.if ${MACHINE_CPUARCH} == "aarch64" || ${MACHINE_CPUARCH} == "amd64" || \
${MACHINE_CPUARCH} == "i386"
SUBDIR+= linprocfs
SUBDIR+= linsysfs
_ena= ena
.if ${MK_OFED} != "no" || defined(ALL_MODULES)
_ibcore= ibcore
_ipoib= ipoib
_iser= iser
.endif
_mlx4= mlx4
_mlx5= mlx5
.if (${MK_INET_SUPPORT} != "no" && ${MK_INET6_SUPPORT} != "no") || \
defined(ALL_MODULES)
_mlx4en= mlx4en
_mlx5en= mlx5en
.endif
.if ${MK_OFED} != "no" || defined(ALL_MODULES)
_mthca= mthca
_mlx4ib= mlx4ib
_mlx5ib= mlx5ib
.endif
.endif
.if ${MK_NETGRAPH} != "no" || defined(ALL_MODULES)
_netgraph= netgraph
.endif
.if (${MK_PF} != "no" && (${MK_INET_SUPPORT} != "no" || \
${MK_INET6_SUPPORT} != "no")) || defined(ALL_MODULES)
_pf= pf
_pflog= pflog
.if ${MK_INET_SUPPORT} != "no"
_pfsync= pfsync
.endif
.endif
.if ${MK_SOURCELESS_UCODE} != "no"
_bce= bce
_fxp= fxp
_ispfw= ispfw
_ti= ti
.if ${MACHINE_CPUARCH} != "mips"
_mwlfw= mwlfw
_otusfw= otusfw
_ralfw= ralfw
_rtwnfw= rtwnfw
.endif
.endif
.if ${MK_SOURCELESS_UCODE} != "no" && ${MACHINE_CPUARCH} != "arm" && \
${MACHINE_CPUARCH} != "mips" && \
${MACHINE_ARCH} != "powerpc" && ${MACHINE_ARCH} != "powerpcspe" && \
${MACHINE_CPUARCH} != "riscv"
_cxgbe= cxgbe
.endif
# These rely on 64bit atomics
.if ${MACHINE_ARCH} != "powerpc" && ${MACHINE_ARCH} != "powerpcspe" && \
${MACHINE_CPUARCH} != "mips"
_mps= mps
_mpr= mpr
.endif
.if ${MK_TESTS} != "no" || defined(ALL_MODULES)
SUBDIR+= tests
.endif
.if ${MK_ZFS} != "no" || defined(ALL_MODULES)
SUBDIR+= zfs
.endif
.if (${MACHINE_CPUARCH} == "mips" && ${MACHINE_ARCH:Mmips64} == "")
_hwpmc_mips24k= hwpmc_mips24k
_hwpmc_mips74k= hwpmc_mips74k
.endif
.if ${MACHINE_CPUARCH} != "aarch64" && ${MACHINE_CPUARCH} != "arm" && \
${MACHINE_CPUARCH} != "mips" && ${MACHINE_CPUARCH} != "powerpc" && \
${MACHINE_CPUARCH} != "riscv"
_syscons= syscons
_vpo= vpo
.endif
.if ${MACHINE_CPUARCH} != "mips"
# no BUS_SPACE_UNSPECIFIED
# No barrier instruction support (specific to this driver)
_sym= sym
# intr_disable() is a macro, causes problems
.if ${MK_SOURCELESS_UCODE} != "no"
_cxgb= cxgb
.endif
.endif
.if ${MACHINE_CPUARCH} == "aarch64"
_allwinner= allwinner
_armv8crypto= armv8crypto
_efirt= efirt
_em= em
_rockchip= rockchip
.endif
.if ${MACHINE_CPUARCH} == "i386" || ${MACHINE_CPUARCH} == "amd64"
_agp= agp
_an= an
_aout= aout
_bios= bios
_bktr= bktr
.if ${MK_SOURCELESS_UCODE} != "no"
_bxe= bxe
.endif
_cardbus= cardbus
_cbb= cbb
_cpuctl= cpuctl
_cpufreq= cpufreq
_dpms= dpms
_em= em
_et= et
_exca= exca
_if_ndis= if_ndis
_io= io
_ix= ix
_ixv= ixv
_linux= linux
.if ${MK_SOURCELESS_UCODE} != "no"
_lio= lio
.endif
_nctgpio= nctgpio
_ndis= ndis
_ntb= ntb
_ocs_fc= ocs_fc
_pccard= pccard
.if ${MK_OFED} != "no" || defined(ALL_MODULES)
_rdma= rdma
.endif
_safe= safe
_speaker= speaker
_splash= splash
_sppp= sppp
_vmware= vmware
_wbwd= wbwd
_wi= wi
_aac= aac
_aacraid= aacraid
_acpi= acpi
.if ${MK_CRYPT} != "no" || defined(ALL_MODULES)
.if ${COMPILER_TYPE} != "gcc" || ${COMPILER_VERSION} > 40201
_aesni= aesni
.endif
.endif
_amd_ecc_inject=amd_ecc_inject
_amdsbwd= amdsbwd
_amdsmn= amdsmn
_amdtemp= amdtemp
_arcmsr= arcmsr
_asmc= asmc
.if ${MK_CRYPT} != "no" || defined(ALL_MODULES)
_blake2= blake2
.endif
_bytgpio= bytgpio
_chvgpio= chvgpio
_ciss= ciss
_chromebook_platform= chromebook_platform
_cmx= cmx
_coretemp= coretemp
.if ${MK_SOURCELESS_HOST} != "no"
_hpt27xx= hpt27xx
.endif
_hptiop= hptiop
.if ${MK_SOURCELESS_HOST} != "no"
_hptmv= hptmv
_hptnr= hptnr
_hptrr= hptrr
.endif
_hyperv= hyperv
_ichwd= ichwd
_ida= ida
_iir= iir
_intelspi= intelspi
_ipmi= ipmi
_ips= ips
_isci= isci
_ipw= ipw
_iwi= iwi
_iwm= iwm
_iwn= iwn
.if ${MK_SOURCELESS_UCODE} != "no"
_ipwfw= ipwfw
_iwifw= iwifw
_iwmfw= iwmfw
_iwnfw= iwnfw
.endif
_mly= mly
_nfe= nfe
_nvd= nvd
_nvme= nvme
_nvram= nvram
.if ${MK_CRYPT} != "no" || defined(ALL_MODULES)
_padlock= padlock
_padlock_rng= padlock_rng
_rdrand_rng= rdrand_rng
.endif
_s3= s3
_sdhci_acpi= sdhci_acpi
_superio= superio
_tpm= tpm
_twa= twa
_vesa= vesa
_viawd= viawd
_virtio= virtio
_wpi= wpi
.if ${MK_SOURCELESS_UCODE} != "no"
_wpifw= wpifw
.endif
_x86bios= x86bios
.endif
.if ${MACHINE_CPUARCH} == "amd64"
_amdgpio= amdgpio
_ccp= ccp
_efirt= efirt
_iavf= iavf
_ioat= ioat
_ixl= ixl
_linux64= linux64
_linux_common= linux_common
_nvdimm= nvdimm
_pms= pms
_qlxge= qlxge
_qlxgb= qlxgb
.if ${MK_SOURCELESS_UCODE} != "no"
_qlxgbe= qlxgbe
_qlnx= qlnx
.endif
_sfxge= sfxge
_sgx= sgx
_sgx_linux= sgx_linux
_smartpqi= smartpqi
.if ${MK_BHYVE} != "no" || defined(ALL_MODULES)
_vmm= vmm
.endif
.endif
.if ${MACHINE_CPUARCH} == "i386"
# XXX some of these can move to the general case when de-i386'ed
# XXX some of these can move now, but are untested on other architectures.
_3dfx= 3dfx
_3dfx_linux= 3dfx_linux
_apm= apm
.if ${MK_SOURCELESS_UCODE} != "no"
_ce= ce
.endif
.if ${MK_SOURCELESS_UCODE} != "no"
_cp= cp
.endif
_glxiic= glxiic
_glxsb= glxsb
_pcfclock= pcfclock
_pst= pst
_sbni= sbni
.if ${MK_SOURCELESS_UCODE} != "no"
_ctau= ctau
.endif
.endif
.if ${MACHINE_CPUARCH} == "arm"
_cfi= cfi
_cpsw= cpsw
.endif
.if ${MACHINE_CPUARCH} == "powerpc"
_agp= agp
_an= an
_cardbus= cardbus
_cbb= cbb
_cfi= cfi
_cpufreq= cpufreq
_exca= exca
_ffec= ffec
_nvd= nvd
_nvme= nvme
_pccard= pccard
_wi= wi
.endif
.if ${MACHINE_ARCH} == "powerpc64"
_ipmi= ipmi
.endif
.if ${MACHINE_ARCH} == "powerpc64" || ${MACHINE_ARCH} == "powerpc"
# Don't build powermac_nvram for powerpcspe, it's never supported.
_nvram= powermac_nvram
.endif
.if ${MACHINE_CPUARCH} == "sparc64"
_auxio= auxio
_em= em
_epic= epic
.endif
.if (${MACHINE_CPUARCH} == "aarch64" || ${MACHINE_CPUARCH} == "amd64" || \
${MACHINE_ARCH:Marmv[67]*} != "" || ${MACHINE_CPUARCH} == "i386")
_cloudabi32= cloudabi32
.endif
.if ${MACHINE_CPUARCH} == "aarch64" || ${MACHINE_CPUARCH} == "amd64"
_cloudabi64= cloudabi64
.endif
.endif
.if ${MACHINE_ARCH:Marmv[67]*} != "" || ${MACHINE_CPUARCH} == "aarch64"
_bcm283x_clkman= bcm283x_clkman
_bcm283x_pwm= bcm283x_pwm
.endif
SUBDIR+=${MODULES_EXTRA}
.for reject in ${WITHOUT_MODULES}
SUBDIR:= ${SUBDIR:N${reject}}
.endfor
# Calling kldxref(8) for each module is expensive.
.if !defined(NO_XREF)
.MAKEFLAGS+= -DNO_XREF
afterinstall: .PHONY
@if type kldxref >/dev/null 2>&1; then \
${ECHO} ${KLDXREF_CMD} ${DESTDIR}${KMODDIR}; \
${KLDXREF_CMD} ${DESTDIR}${KMODDIR}; \
fi
.endif
.include "${SYSDIR}/conf/config.mk"
SUBDIR:= ${SUBDIR:u:O}
.include <bsd.subdir.mk>
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