Author: jtl
Date: Wed Oct 12 02:16:42 2016
New Revision: 307082
URL: https://svnweb.freebsd.org/changeset/base/307082

Log:
  In the TCP stack, the hhook(9) framework provides hooks for kernel modules
  to add actions that run when a TCP frame is sent or received on a TCP
  session in the ESTABLISHED state. In the base tree, this functionality is
  only used for the h_ertt module, which is used by the cc_cdg, cc_chd, cc_hd,
  and cc_vegas congestion control modules.
  
  Presently, we incur overhead to check for hooks each time a TCP frame is
  sent or received on an ESTABLISHED TCP session.
  
  This change adds a new compile-time option (TCP_HHOOK) to determine whether
  to include the hhook(9) framework for TCP. To retain backwards
  compatibility, I added the TCP_HHOOK option to every configuration file that
  already defined "options INET". (Therefore, this patch introduces no
  functional change. In order to see a functional difference, you need to
  compile a custom kernel without the TCP_HHOOK option.) This change will
  allow users to easily exclude this functionality from their kernel, should
  they wish to do so.
  
  Note that any users who use a custom kernel configuration and use one of the
  congestion control modules listed above will need to add the TCP_HHOOK
  option to their kernel configuration.
  
  Reviewed by:  rrs, lstewart, hiren (previous version), sjg (makefiles only)
  Sponsored by: Netflix
  Differential Revision:        https://reviews.freebsd.org/D8185

Modified:
  head/UPDATING
  head/sys/amd64/conf/GENERIC
  head/sys/arm/conf/ATMEL
  head/sys/arm/conf/AVILA
  head/sys/arm/conf/BWCT
  head/sys/arm/conf/CAMBRIA
  head/sys/arm/conf/CNS11XXNAS
  head/sys/arm/conf/CRB
  head/sys/arm/conf/DB-78XXX
  head/sys/arm/conf/DB-88F5XXX
  head/sys/arm/conf/DB-88F6XXX
  head/sys/arm/conf/DOCKSTAR
  head/sys/arm/conf/DREAMPLUG-1001
  head/sys/arm/conf/EA3250
  head/sys/arm/conf/EB9200
  head/sys/arm/conf/ETHERNUT5
  head/sys/arm/conf/EXYNOS5.common
  head/sys/arm/conf/GUMSTIX
  head/sys/arm/conf/HL200
  head/sys/arm/conf/HL201
  head/sys/arm/conf/KB920X
  head/sys/arm/conf/NSLU
  head/sys/arm/conf/QILA9G20
  head/sys/arm/conf/SAM9260EK
  head/sys/arm/conf/SAM9G20EK
  head/sys/arm/conf/SAM9X25EK
  head/sys/arm/conf/SHEEVAPLUG
  head/sys/arm/conf/SN9G45
  head/sys/arm/conf/TS7800
  head/sys/arm/conf/std.armv6
  head/sys/arm64/conf/GENERIC
  head/sys/conf/NOTES
  head/sys/conf/options
  head/sys/i386/conf/GENERIC
  head/sys/mips/conf/ADM5120
  head/sys/mips/conf/ALCHEMY
  head/sys/mips/conf/AR71XX_BASE
  head/sys/mips/conf/AR724X_BASE
  head/sys/mips/conf/BCM
  head/sys/mips/conf/BERI_TEMPLATE
  head/sys/mips/conf/ERL
  head/sys/mips/conf/GXEMUL
  head/sys/mips/conf/GXEMUL32
  head/sys/mips/conf/IDT
  head/sys/mips/conf/MT7620
  head/sys/mips/conf/OCTEON1
  head/sys/mips/conf/PB92
  head/sys/mips/conf/QCA953X_BASE
  head/sys/mips/conf/QEMU
  head/sys/mips/conf/RT305X
  head/sys/mips/conf/RT5350
  head/sys/mips/conf/SENTRY5
  head/sys/mips/conf/XLR
  head/sys/mips/conf/XLR64
  head/sys/mips/conf/XLRN32
  head/sys/mips/conf/std.AR5312
  head/sys/mips/conf/std.AR5315
  head/sys/mips/conf/std.AR91XX
  head/sys/mips/conf/std.AR933X
  head/sys/mips/conf/std.AR934X
  head/sys/mips/conf/std.MALTA
  head/sys/mips/conf/std.QCA955X
  head/sys/mips/conf/std.SWARM
  head/sys/mips/conf/std.XLP
  head/sys/modules/cc/Makefile
  head/sys/modules/khelp/Makefile
  head/sys/netinet/tcp_input.c
  head/sys/netinet/tcp_output.c
  head/sys/netinet/tcp_stacks/fastpath.c
  head/sys/netinet/tcp_subr.c
  head/sys/netinet/tcp_var.h
  head/sys/pc98/conf/GENERIC
  head/sys/powerpc/conf/GENERIC
  head/sys/powerpc/conf/GENERIC64
  head/sys/powerpc/conf/MPC85XX
  head/sys/riscv/conf/GENERIC
  head/sys/sparc64/conf/GENERIC

Modified: head/UPDATING
==============================================================================
--- head/UPDATING       Wed Oct 12 02:15:06 2016        (r307081)
+++ head/UPDATING       Wed Oct 12 02:16:42 2016        (r307082)
@@ -31,6 +31,11 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 12
        disable the most expensive debugging functionality run
        "ln -s 'abort:false,junk:false' /etc/malloc.conf".)
 
+20161008:
+       Use of the cc_cdg, cc_chd, cc_hd, or cc_vegas congestion control
+       modules now requires that the kernel configuration contain the
+       TCP_HHOOK option. (This option is included in the GENERIC kernel.)
+
 20161003:
        The WITHOUT_ELFCOPY_AS_OBJCOPY src.conf(5) knob has been retired.
        ELF Tool Chain's elfcopy is always installed as /usr/bin/objcopy.

Modified: head/sys/amd64/conf/GENERIC
==============================================================================
--- head/sys/amd64/conf/GENERIC Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/amd64/conf/GENERIC Wed Oct 12 02:16:42 2016        (r307082)
@@ -30,6 +30,7 @@ options       INET                    # InterNETworking
 options        INET6                   # IPv6 communications protocols
 options        IPSEC                   # IP (v4/v6) security
 options        TCP_OFFLOAD             # TCP offload
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        SCTP                    # Stream Control Transmission Protocol
 options        FFS                     # Berkeley Fast Filesystem
 options        SOFTUPDATES             # Enable FFS soft updates support

Modified: head/sys/arm/conf/ATMEL
==============================================================================
--- head/sys/arm/conf/ATMEL     Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/arm/conf/ATMEL     Wed Oct 12 02:16:42 2016        (r307082)
@@ -35,6 +35,7 @@ options       SCHED_4BSD              # 4BSD scheduler
 #options       PREEMPTION              # Enable kernel thread preemption
 options        INET                    # InterNETworking
 options        INET6                   # IPv6 communications protocols
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        SCTP                    # Stream Control Transmission Protocol
 options        FFS                     # Berkeley Fast Filesystem
 options        SOFTUPDATES             # Enable FFS soft updates support

Modified: head/sys/arm/conf/AVILA
==============================================================================
--- head/sys/arm/conf/AVILA     Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/arm/conf/AVILA     Wed Oct 12 02:16:42 2016        (r307082)
@@ -36,6 +36,7 @@ options       DEVICE_POLLING
 
 options        SCHED_4BSD              # 4BSD scheduler
 options        INET                    # InterNETworking
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        GEOM_PART_BSD           # BSD partition scheme
 options        GEOM_PART_MBR           # MBR partition scheme
 options        TMPFS                   # Efficient memory filesystem

Modified: head/sys/arm/conf/BWCT
==============================================================================
--- head/sys/arm/conf/BWCT      Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/arm/conf/BWCT      Wed Oct 12 02:16:42 2016        (r307082)
@@ -33,6 +33,7 @@ makeoptions   MODULES_OVERRIDE=""
 options        SCHED_4BSD              # 4BSD scheduler
 options        INET                    # InterNETworking
 #options       INET6                   # IPv6 communications protocols
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        FFS                     # Berkeley Fast Filesystem
 options        SOFTUPDATES             # Enable FFS soft updates support
 #options       UFS_ACL                 # Support for access control lists

Modified: head/sys/arm/conf/CAMBRIA
==============================================================================
--- head/sys/arm/conf/CAMBRIA   Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/arm/conf/CAMBRIA   Wed Oct 12 02:16:42 2016        (r307082)
@@ -37,6 +37,7 @@ options       DEVICE_POLLING
 options        SCHED_4BSD              # 4BSD scheduler
 #options       PREEMPTION
 options        INET                    # InterNETworking
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        GEOM_PART_BSD           # BSD partition scheme
 options        GEOM_PART_MBR           # MBR partition scheme
 options        TMPFS                   # Efficient memory filesystem

Modified: head/sys/arm/conf/CNS11XXNAS
==============================================================================
--- head/sys/arm/conf/CNS11XXNAS        Wed Oct 12 02:15:06 2016        
(r307081)
+++ head/sys/arm/conf/CNS11XXNAS        Wed Oct 12 02:16:42 2016        
(r307082)
@@ -46,6 +46,7 @@ options       GEOM_LABEL              # Provides labeliza
 
 options        INET                    # InterNETworking
 options        INET6                   # IPv6 communications protocols
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        FFS                     # Berkeley Fast Filesystem
 options        SOFTUPDATES             # Enable FFS soft updates support
 options        UFS_ACL                 # Support for access control lists

Modified: head/sys/arm/conf/CRB
==============================================================================
--- head/sys/arm/conf/CRB       Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/arm/conf/CRB       Wed Oct 12 02:16:42 2016        (r307082)
@@ -34,6 +34,7 @@ options       HZ=100
 options        SCHED_4BSD              # 4BSD scheduler
 options        INET                    # InterNETworking
 options        INET6                   # IPv6 communications protocols
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        FFS                     # Berkeley Fast Filesystem
 options        SOFTUPDATES             # Enable FFS soft updates support
 options        UFS_ACL                 # Support for access control lists

Modified: head/sys/arm/conf/DB-78XXX
==============================================================================
--- head/sys/arm/conf/DB-78XXX  Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/arm/conf/DB-78XXX  Wed Oct 12 02:16:42 2016        (r307082)
@@ -15,6 +15,7 @@ makeoptions   WERROR="-Werror"
 options        SCHED_4BSD              # 4BSD scheduler
 options        INET                    # InterNETworking
 options        INET6                   # IPv6 communications protocols
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        GEOM_PART_BSD           # BSD partition scheme
 options        GEOM_PART_MBR           # MBR partition scheme
 options        TMPFS                   # Efficient memory filesystem

Modified: head/sys/arm/conf/DB-88F5XXX
==============================================================================
--- head/sys/arm/conf/DB-88F5XXX        Wed Oct 12 02:15:06 2016        
(r307081)
+++ head/sys/arm/conf/DB-88F5XXX        Wed Oct 12 02:16:42 2016        
(r307082)
@@ -15,6 +15,7 @@ makeoptions   WERROR="-Werror"
 options        SCHED_4BSD              # 4BSD scheduler
 options        INET                    # InterNETworking
 options        INET6                   # IPv6 communications protocols
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        GEOM_PART_BSD           # BSD partition scheme
 options        GEOM_PART_MBR           # MBR partition scheme
 options        TMPFS                   # Efficient memory filesystem

Modified: head/sys/arm/conf/DB-88F6XXX
==============================================================================
--- head/sys/arm/conf/DB-88F6XXX        Wed Oct 12 02:15:06 2016        
(r307081)
+++ head/sys/arm/conf/DB-88F6XXX        Wed Oct 12 02:16:42 2016        
(r307082)
@@ -15,6 +15,7 @@ makeoptions   WERROR="-Werror"
 options        SCHED_4BSD              # 4BSD scheduler
 options        INET                    # InterNETworking
 options        INET6                   # IPv6 communications protocols
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        FFS                     # Berkeley Fast Filesystem
 options        NANDFS                  # NAND Filesystem
 options        NFSCL                   # Network Filesystem Client

Modified: head/sys/arm/conf/DOCKSTAR
==============================================================================
--- head/sys/arm/conf/DOCKSTAR  Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/arm/conf/DOCKSTAR  Wed Oct 12 02:16:42 2016        (r307082)
@@ -29,6 +29,7 @@ options       SOC_MV_KIRKWOOD
 options        SCHED_4BSD              # 4BSD scheduler
 options        INET                    # InterNETworking
 options        INET6                   # IPv6 communications protocols
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        FFS                     # Berkeley Fast Filesystem
 options        SOFTUPDATES             # Enable FFS soft updates support
 options        NFSCL                   # Network Filesystem Client

Modified: head/sys/arm/conf/DREAMPLUG-1001
==============================================================================
--- head/sys/arm/conf/DREAMPLUG-1001    Wed Oct 12 02:15:06 2016        
(r307081)
+++ head/sys/arm/conf/DREAMPLUG-1001    Wed Oct 12 02:16:42 2016        
(r307082)
@@ -32,6 +32,7 @@ options       SOC_MV_KIRKWOOD
 options        SCHED_4BSD              # 4BSD scheduler
 options        INET                    # InterNETworking
 options        INET6                   # IPv6 communications protocols
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        FFS                     # Berkeley Fast Filesystem
 options        SOFTUPDATES             # Enable FFS soft updates support
 options        NFSCL                   # Network Filesystem Client

Modified: head/sys/arm/conf/EA3250
==============================================================================
--- head/sys/arm/conf/EA3250    Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/arm/conf/EA3250    Wed Oct 12 02:16:42 2016        (r307082)
@@ -16,6 +16,7 @@ makeoptions   WERROR="-Werror"
 options        SCHED_4BSD              # 4BSD scheduler
 options        INET                    # InterNETworking
 options        INET6                   # IPv6 communications protocols
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        FFS                     # Berkeley Fast Filesystem
 options        NFSCL                   # Network Filesystem Client
 options        NFSLOCKD                # Network Lock Manager

Modified: head/sys/arm/conf/EB9200
==============================================================================
--- head/sys/arm/conf/EB9200    Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/arm/conf/EB9200    Wed Oct 12 02:16:42 2016        (r307082)
@@ -26,6 +26,7 @@ makeoptions   MODULES_OVERRIDE=""
 options        SCHED_4BSD              # 4BSD scheduler
 options        INET                    # InterNETworking
 #options       INET6                   # IPv6 communications protocols
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        FFS                     # Berkeley Fast Filesystem
 #options       SOFTUPDATES             # Enable FFS soft updates support
 #options       UFS_ACL                 # Support for access control lists

Modified: head/sys/arm/conf/ETHERNUT5
==============================================================================
--- head/sys/arm/conf/ETHERNUT5 Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/arm/conf/ETHERNUT5 Wed Oct 12 02:16:42 2016        (r307082)
@@ -31,6 +31,7 @@ options       SCHED_4BSD              # 4BSD scheduler
 #options       PREEMPTION              # Enable kernel thread preemption
 options        INET                    # InterNETworking
 #options       INET6                   # IPv6 communications protocols
+options        TCP_HHOOK               # hhook(9) framework for TCP
 #options       SCTP                    # Stream Control Transmission Protocol
 options        FFS                     # Berkeley Fast Filesystem
 options        SOFTUPDATES             # Enable FFS soft updates support

Modified: head/sys/arm/conf/EXYNOS5.common
==============================================================================
--- head/sys/arm/conf/EXYNOS5.common    Wed Oct 12 02:15:06 2016        
(r307081)
+++ head/sys/arm/conf/EXYNOS5.common    Wed Oct 12 02:16:42 2016        
(r307082)
@@ -25,6 +25,7 @@ options       SCHED_ULE               # ULE scheduler
 options        PREEMPTION              # Enable kernel thread preemption
 options        INET                    # InterNETworking
 options        INET6                   # IPv6 communications protocols
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        SCTP                    # Stream Control Transmission Protocol
 options        FFS                     # Berkeley Fast Filesystem
 options        SOFTUPDATES             # Enable FFS soft updates support

Modified: head/sys/arm/conf/GUMSTIX
==============================================================================
--- head/sys/arm/conf/GUMSTIX   Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/arm/conf/GUMSTIX   Wed Oct 12 02:16:42 2016        (r307082)
@@ -39,6 +39,7 @@ options       HZ=100
 options        SCHED_4BSD              # 4BSD scheduler
 options        INET                    # InterNETworking
 #options       INET6                   # IPv6 communications protocols
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        FFS                     # Berkeley Fast Filesystem
 options        SOFTUPDATES             # Enable FFS soft updates support
 options        UFS_ACL                 # Support for access control lists

Modified: head/sys/arm/conf/HL200
==============================================================================
--- head/sys/arm/conf/HL200     Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/arm/conf/HL200     Wed Oct 12 02:16:42 2016        (r307082)
@@ -31,6 +31,7 @@ makeoptions   MODULES_OVERRIDE=""
 options        SCHED_4BSD              # 4BSD scheduler
 options        INET                    # InterNETworking
 #options       INET6                   # IPv6 communications protocols
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        FFS                     # Berkeley Fast Filesystem
 #options       SOFTUPDATES             # Enable FFS soft updates support
 #options       UFS_ACL                 # Support for access control lists

Modified: head/sys/arm/conf/HL201
==============================================================================
--- head/sys/arm/conf/HL201     Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/arm/conf/HL201     Wed Oct 12 02:16:42 2016        (r307082)
@@ -29,6 +29,7 @@ makeoptions   MODULES_OVERRIDE=""
 options        SCHED_4BSD              # 4BSD scheduler
 options        INET                    # InterNETworking
 #options       INET6                   # IPv6 communications protocols
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        FFS                     # Berkeley Fast Filesystem
 #options       SOFTUPDATES             # Enable FFS soft updates support
 #options       UFS_ACL                 # Support for access control lists

Modified: head/sys/arm/conf/KB920X
==============================================================================
--- head/sys/arm/conf/KB920X    Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/arm/conf/KB920X    Wed Oct 12 02:16:42 2016        (r307082)
@@ -32,6 +32,7 @@ makeoptions   MODULES_OVERRIDE=""
 options        SCHED_4BSD              # 4BSD scheduler
 options        INET                    # InterNETworking
 #options       INET6                   # IPv6 communications protocols
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        FFS                     # Berkeley Fast Filesystem
 #options       SOFTUPDATES             # Enable FFS soft updates support
 #options       UFS_ACL                 # Support for access control lists

Modified: head/sys/arm/conf/NSLU
==============================================================================
--- head/sys/arm/conf/NSLU      Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/arm/conf/NSLU      Wed Oct 12 02:16:42 2016        (r307082)
@@ -43,6 +43,7 @@ options       DEVICE_POLLING
 options        SCHED_ULE               # ULE scheduler
 options        INET                    # InterNETworking
 options        INET6                   # IPv6 communications protocols
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        FFS                     # Berkeley Fast Filesystem
 options        SOFTUPDATES             # Enable FFS soft updates support
 options        UFS_ACL                 # Support for access control lists

Modified: head/sys/arm/conf/QILA9G20
==============================================================================
--- head/sys/arm/conf/QILA9G20  Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/arm/conf/QILA9G20  Wed Oct 12 02:16:42 2016        (r307082)
@@ -32,6 +32,7 @@ makeoptions   MODULES_OVERRIDE=""
 options        SCHED_4BSD              # 4BSD scheduler
 options        INET                    # InterNETworking
 #options       INET6                   # IPv6 communications protocols
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        FFS                     # Berkeley Fast Filesystem
 #options       SOFTUPDATES             # Enable FFS soft updates support
 #options       UFS_ACL                 # Support for access control lists

Modified: head/sys/arm/conf/SAM9260EK
==============================================================================
--- head/sys/arm/conf/SAM9260EK Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/arm/conf/SAM9260EK Wed Oct 12 02:16:42 2016        (r307082)
@@ -42,6 +42,7 @@ options       SCHED_4BSD              # 4BSD scheduler
 #options       PREEMPTION              # Enable kernel thread preemption
 options        INET                    # InterNETworking
 #options       INET6                   # IPv6 communications protocols
+options        TCP_HHOOK               # hhook(9) framework for TCP
 #options       SCTP                    # Stream Control Transmission Protocol
 options        FFS                     # Berkeley Fast Filesystem
 options        SOFTUPDATES             # Enable FFS soft updates support

Modified: head/sys/arm/conf/SAM9G20EK
==============================================================================
--- head/sys/arm/conf/SAM9G20EK Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/arm/conf/SAM9G20EK Wed Oct 12 02:16:42 2016        (r307082)
@@ -38,6 +38,7 @@ makeoptions   MODULES_OVERRIDE=""
 options        SCHED_4BSD              # 4BSD scheduler
 options        INET                    # InterNETworking
 #options       INET6                   # IPv6 communications protocols
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        TMPFS                   # Efficient memory filesystem
 options        FFS                     # Berkeley Fast Filesystem
 #options       SOFTUPDATES             # Enable FFS soft updates support

Modified: head/sys/arm/conf/SAM9X25EK
==============================================================================
--- head/sys/arm/conf/SAM9X25EK Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/arm/conf/SAM9X25EK Wed Oct 12 02:16:42 2016        (r307082)
@@ -31,6 +31,7 @@ makeoptions   MODULES_OVERRIDE=""
 options        SCHED_4BSD              # 4BSD scheduler
 options        INET                    # InterNETworking
 #options       INET6                   # IPv6 communications protocols
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        FFS                     # Berkeley Fast Filesystem
 #options       SOFTUPDATES             # Enable FFS soft updates support
 #options       UFS_ACL                 # Support for access control lists

Modified: head/sys/arm/conf/SHEEVAPLUG
==============================================================================
--- head/sys/arm/conf/SHEEVAPLUG        Wed Oct 12 02:15:06 2016        
(r307081)
+++ head/sys/arm/conf/SHEEVAPLUG        Wed Oct 12 02:16:42 2016        
(r307082)
@@ -17,6 +17,7 @@ options       HZ=1000
 options        SCHED_4BSD              # 4BSD scheduler
 options        INET                    # InterNETworking
 options        INET6                   # IPv6 communications protocols
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        FFS                     # Berkeley Fast Filesystem
 options        NANDFS                  # NAND Filesystem
 options        NFSCL                   # Network Filesystem Client

Modified: head/sys/arm/conf/SN9G45
==============================================================================
--- head/sys/arm/conf/SN9G45    Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/arm/conf/SN9G45    Wed Oct 12 02:16:42 2016        (r307082)
@@ -31,6 +31,7 @@ makeoptions   MODULES_OVERRIDE=""
 options        SCHED_4BSD              # 4BSD scheduler
 options        INET                    # InterNETworking
 #options       INET6                   # IPv6 communications protocols
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        FFS                     # Berkeley Fast Filesystem
 #options       SOFTUPDATES             # Enable FFS soft updates support
 #options       UFS_ACL                 # Support for access control lists

Modified: head/sys/arm/conf/TS7800
==============================================================================
--- head/sys/arm/conf/TS7800    Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/arm/conf/TS7800    Wed Oct 12 02:16:42 2016        (r307082)
@@ -15,6 +15,7 @@ makeoptions   WERROR="-Werror"
 options        SCHED_4BSD              # 4BSD scheduler
 options        INET                    # InterNETworking
 options        INET6                   # IPv6 communications protocols
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        FFS                     # Berkeley Fast Filesystem
 options        SOFTUPDATES             # Enable FFS soft updates support
 options        NFSCL                   # Network Filesystem Client

Modified: head/sys/arm/conf/std.armv6
==============================================================================
--- head/sys/arm/conf/std.armv6 Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/arm/conf/std.armv6 Wed Oct 12 02:16:42 2016        (r307082)
@@ -7,6 +7,7 @@ options         ARM_L2_PIPT             # Only L2 PIPT is 
 options        PREEMPTION              # Enable kernel thread preemption
 options        INET                    # InterNETworking
 options        INET6                   # IPv6 communications protocols
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        IPSEC                   # IP (v4/v6) security
 options        SCTP                    # Stream Control Transmission Protocol
 options        FFS                     # Berkeley Fast Filesystem

Modified: head/sys/arm64/conf/GENERIC
==============================================================================
--- head/sys/arm64/conf/GENERIC Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/arm64/conf/GENERIC Wed Oct 12 02:16:42 2016        (r307082)
@@ -29,6 +29,7 @@ options       PREEMPTION              # Enable kernel thr
 options        INET                    # InterNETworking
 options        INET6                   # IPv6 communications protocols
 options        IPSEC                   # IP (v4/v6) security
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        TCP_OFFLOAD             # TCP offload
 options        SCTP                    # Stream Control Transmission Protocol
 options        FFS                     # Berkeley Fast Filesystem

Modified: head/sys/conf/NOTES
==============================================================================
--- head/sys/conf/NOTES Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/conf/NOTES Wed Oct 12 02:16:42 2016        (r307082)
@@ -982,6 +982,8 @@ device              lagg
 # TCPPCAP enables code which keeps the last n packets sent and received
 # on a TCP socket.
 #
+# TCP_HHOOK enables the hhook(9) framework hooks for the TCP stack.
+#
 # RADIX_MPATH provides support for equal-cost multi-path routing.
 #
 options        MROUTING                # Multicast routing
@@ -1001,6 +1003,7 @@ options   IPSTEALTH               #support for stealth
 options        PF_DEFAULT_TO_DROP      #drop everything by default
 options        TCPDEBUG
 options        TCPPCAP
+options        TCP_HHOOK
 options        RADIX_MPATH
 
 # The MBUF_STRESS_TEST option enables options which create

Modified: head/sys/conf/options
==============================================================================
--- head/sys/conf/options       Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/conf/options       Wed Oct 12 02:16:42 2016        (r307082)
@@ -443,6 +443,7 @@ SLIP_IFF_OPTS               opt_slip.h
 TCPDEBUG
 TCPPCAP                opt_global.h
 SIFTR
+TCP_HHOOK              opt_inet.h
 TCP_OFFLOAD            opt_inet.h # Enable code to dispatch TCP offloading
 TCP_RFC7413            opt_inet.h
 TCP_RFC7413_MAX_KEYS   opt_inet.h

Modified: head/sys/i386/conf/GENERIC
==============================================================================
--- head/sys/i386/conf/GENERIC  Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/i386/conf/GENERIC  Wed Oct 12 02:16:42 2016        (r307082)
@@ -31,6 +31,7 @@ options       PREEMPTION              # Enable kernel thr
 options        INET                    # InterNETworking
 options        INET6                   # IPv6 communications protocols
 options        IPSEC                   # IP (v4/v6) security
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        TCP_OFFLOAD             # TCP offload
 options        SCTP                    # Stream Control Transmission Protocol
 options        FFS                     # Berkeley Fast Filesystem

Modified: head/sys/mips/conf/ADM5120
==============================================================================
--- head/sys/mips/conf/ADM5120  Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/mips/conf/ADM5120  Wed Oct 12 02:16:42 2016        (r307082)
@@ -33,6 +33,7 @@ options       KDB
 
 options        SCHED_4BSD              #4BSD scheduler
 options        INET                    #InterNETworking
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        NFSCL                   #Network Filesystem Client
 options        NFS_ROOT                #NFS usable as /, requires NFSCL
 options        PSEUDOFS                #Pseudo-filesystem framework

Modified: head/sys/mips/conf/ALCHEMY
==============================================================================
--- head/sys/mips/conf/ALCHEMY  Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/mips/conf/ALCHEMY  Wed Oct 12 02:16:42 2016        (r307082)
@@ -33,6 +33,7 @@ options       KDB
 
 options        SCHED_4BSD              #4BSD scheduler
 options        INET                    #InterNETworking
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        NFSCL                   #Network Filesystem Client
 options        NFS_ROOT                #NFS usable as /, requires NFSCL
 options        PSEUDOFS                #Pseudo-filesystem framework

Modified: head/sys/mips/conf/AR71XX_BASE
==============================================================================
--- head/sys/mips/conf/AR71XX_BASE      Wed Oct 12 02:15:06 2016        
(r307081)
+++ head/sys/mips/conf/AR71XX_BASE      Wed Oct 12 02:16:42 2016        
(r307082)
@@ -35,6 +35,7 @@ options       KDB
 options        SCHED_4BSD              #4BSD scheduler
 options        INET                    #InterNETworking
 options        INET6                   # IPv6
+options        TCP_HHOOK               # hhook(9) framework for TCP
 
 # options      NFSCL           #Network Filesystem Client
 

Modified: head/sys/mips/conf/AR724X_BASE
==============================================================================
--- head/sys/mips/conf/AR724X_BASE      Wed Oct 12 02:15:06 2016        
(r307081)
+++ head/sys/mips/conf/AR724X_BASE      Wed Oct 12 02:16:42 2016        
(r307082)
@@ -36,6 +36,7 @@ options       KDB
 options        SCHED_4BSD              #4BSD scheduler
 options        INET                    #InterNETworking
 #options       INET6                   # IPv6
+options        TCP_HHOOK               # hhook(9) framework for TCP
 #options       NFSCL                   #Network Filesystem Client
 options        PSEUDOFS                #Pseudo-filesystem framework
 options        _KPOSIX_PRIORITY_SCHEDULING #Posix P1003_1B real-time extensions

Modified: head/sys/mips/conf/BCM
==============================================================================
--- head/sys/mips/conf/BCM      Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/mips/conf/BCM      Wed Oct 12 02:16:42 2016        (r307082)
@@ -28,6 +28,7 @@ options       KDB
 
 options        SCHED_4BSD              #4BSD scheduler
 options        INET                    #InterNETworking
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        NFSCL                   #Network Filesystem Client
 #options       NFS_ROOT                #NFS usable as /, requires NFSCL
 options        PSEUDOFS                #Pseudo-filesystem framework

Modified: head/sys/mips/conf/BERI_TEMPLATE
==============================================================================
--- head/sys/mips/conf/BERI_TEMPLATE    Wed Oct 12 02:15:06 2016        
(r307081)
+++ head/sys/mips/conf/BERI_TEMPLATE    Wed Oct 12 02:16:42 2016        
(r307082)
@@ -39,6 +39,7 @@ options       FFS                     #Berkeley Fast 
Filesystem
 
 options        INET
 options        INET6
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        KGSSAPI
 options        NFSCL
 options        NFSLOCKD

Modified: head/sys/mips/conf/ERL
==============================================================================
--- head/sys/mips/conf/ERL      Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/mips/conf/ERL      Wed Oct 12 02:16:42 2016        (r307082)
@@ -55,6 +55,7 @@ options       SCHED_ULE               # ULE scheduler
 options        PREEMPTION              # Enable kernel thread preemption
 options        INET                    # InterNETworking
 options        INET6                   # IPv6 communications protocols
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        SCTP                    # Stream Control Transmission Protocol
 options        FFS                     # Berkeley Fast Filesystem
 options        SOFTUPDATES             # Enable FFS soft updates support

Modified: head/sys/mips/conf/GXEMUL
==============================================================================
--- head/sys/mips/conf/GXEMUL   Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/mips/conf/GXEMUL   Wed Oct 12 02:16:42 2016        (r307082)
@@ -32,6 +32,7 @@ options       SMP                     # Symmetric 
MultiProcesso
 options        SCHED_ULE
 options        INET                    # InterNETworking
 options        INET6                   # IPv6 communications protocols
+options        TCP_HHOOK               # hhook(9) framework for TCP
 
 options        FFS                     #Berkeley Fast Filesystem
 

Modified: head/sys/mips/conf/GXEMUL32
==============================================================================
--- head/sys/mips/conf/GXEMUL32 Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/mips/conf/GXEMUL32 Wed Oct 12 02:16:42 2016        (r307082)
@@ -30,6 +30,7 @@ options       SMP                     # Symmetric 
MultiProcesso
 options        SCHED_ULE
 options        INET                    # InterNETworking
 options        INET6                   # IPv6 communications protocols
+options        TCP_HHOOK               # hhook(9) framework for TCP
 
 options        FFS                     #Berkeley Fast Filesystem
 

Modified: head/sys/mips/conf/IDT
==============================================================================
--- head/sys/mips/conf/IDT      Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/mips/conf/IDT      Wed Oct 12 02:16:42 2016        (r307082)
@@ -16,6 +16,7 @@ options       KDB
 
 options        SCHED_4BSD              #4BSD scheduler
 options        INET                    #InterNETworking
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        NFSCL                   #Network Filesystem Client
 options        NFS_ROOT                #NFS usable as /, requires NFSCL
 options        PSEUDOFS                #Pseudo-filesystem framework

Modified: head/sys/mips/conf/MT7620
==============================================================================
--- head/sys/mips/conf/MT7620   Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/mips/conf/MT7620   Wed Oct 12 02:16:42 2016        (r307082)
@@ -54,6 +54,7 @@ options       SCHED_ULE
 #options       SCHED_4BSD              #4BSD scheduler
 #options       COMPAT_43
 options        INET                    #InterNETworking
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        NFSCL                   #Network Filesystem Client
 options        NFS_ROOT                #NFS usable as /, requires NFSCL
 options        PSEUDOFS                #Pseudo-filesystem framework

Modified: head/sys/mips/conf/OCTEON1
==============================================================================
--- head/sys/mips/conf/OCTEON1  Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/mips/conf/OCTEON1  Wed Oct 12 02:16:42 2016        (r307082)
@@ -54,6 +54,7 @@ options       SCHED_ULE               # ULE scheduler
 options        PREEMPTION              # Enable kernel thread preemption
 options        INET                    # InterNETworking
 options        INET6                   # IPv6 communications protocols
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        SCTP                    # Stream Control Transmission Protocol
 options        FFS                     # Berkeley Fast Filesystem
 options        SOFTUPDATES             # Enable FFS soft updates support

Modified: head/sys/mips/conf/PB92
==============================================================================
--- head/sys/mips/conf/PB92     Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/mips/conf/PB92     Wed Oct 12 02:16:42 2016        (r307082)
@@ -37,6 +37,7 @@ options       SCHED_4BSD              #4BSD scheduler
 options        INET                    #InterNETworking
 # Can't do IPv6 - it just doesn't fit.
 # options      INET6
+options        TCP_HHOOK               # hhook(9) framework for TCP
 # options      NFSCL                   #Network Filesystem Client
 options        PSEUDOFS                #Pseudo-filesystem framework
 options        _KPOSIX_PRIORITY_SCHEDULING #Posix P1003_1B real-time extensions

Modified: head/sys/mips/conf/QCA953X_BASE
==============================================================================
--- head/sys/mips/conf/QCA953X_BASE     Wed Oct 12 02:15:06 2016        
(r307081)
+++ head/sys/mips/conf/QCA953X_BASE     Wed Oct 12 02:16:42 2016        
(r307082)
@@ -31,6 +31,7 @@ options       ALT_BREAK_TO_DEBUGGER
 options        SCHED_4BSD              #4BSD scheduler
 options        INET                    #InterNETworking
 #options       INET6                   #InterNETworking
+options        TCP_HHOOK               # hhook(9) framework for TCP
 #options       NFSCL                   #Network Filesystem Client
 options        PSEUDOFS                #Pseudo-filesystem framework
 options        _KPOSIX_PRIORITY_SCHEDULING #Posix P1003_1B real-time extensions

Modified: head/sys/mips/conf/QEMU
==============================================================================
--- head/sys/mips/conf/QEMU     Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/mips/conf/QEMU     Wed Oct 12 02:16:42 2016        (r307082)
@@ -32,6 +32,7 @@ options       KDB
 
 options        SCHED_4BSD              #4BSD scheduler
 options        INET                    #InterNETworking
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        NFSCL                   #Network Filesystem Client
 options        NFS_ROOT                #NFS usable as /, requires NFSCL
 options        PSEUDOFS                #Pseudo-filesystem framework

Modified: head/sys/mips/conf/RT305X
==============================================================================
--- head/sys/mips/conf/RT305X   Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/mips/conf/RT305X   Wed Oct 12 02:16:42 2016        (r307082)
@@ -53,6 +53,7 @@ options       SCHED_ULE
 #options       SCHED_4BSD              #4BSD scheduler
 #options       COMPAT_43
 options        INET                    #InterNETworking
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        NFSCL                   #Network Filesystem Client
 options        NFS_ROOT                #NFS usable as /, requires NFSCL
 options        PSEUDOFS                #Pseudo-filesystem framework

Modified: head/sys/mips/conf/RT5350
==============================================================================
--- head/sys/mips/conf/RT5350   Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/mips/conf/RT5350   Wed Oct 12 02:16:42 2016        (r307082)
@@ -51,6 +51,7 @@ options       KDB
 
 options        SCHED_ULE
 options        INET                    #InterNETworking
+options        TCP_HHOOK               # hhook(9) framework for TCP
 #options       NFSCL                   #Network Filesystem Client
 #options       NFS_ROOT                #NFS usable as /, requires NFSCL
 options        PSEUDOFS                #Pseudo-filesystem framework

Modified: head/sys/mips/conf/SENTRY5
==============================================================================
--- head/sys/mips/conf/SENTRY5  Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/mips/conf/SENTRY5  Wed Oct 12 02:16:42 2016        (r307082)
@@ -44,6 +44,7 @@ options       KDB
 
 options        SCHED_4BSD              #4BSD scheduler
 options        INET                    #InterNETworking
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        NFSCL                   #Network Filesystem Client
 options        NFS_ROOT                #NFS usable as /, requires NFSCL
 options        PSEUDOFS                #Pseudo-filesystem framework

Modified: head/sys/mips/conf/XLR
==============================================================================
--- head/sys/mips/conf/XLR      Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/mips/conf/XLR      Wed Oct 12 02:16:42 2016        (r307082)
@@ -62,6 +62,7 @@ options       PREEMPTION              # Enable kernel thr
 #options       FULL_PREEMPTION         # Enable kernel thread preemption
 options        INET                    # InterNETworking
 options        INET6                   # IPv6 communications protocols
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        FFS                     # Berkeley Fast Filesystem
 #options       SOFTUPDATES             # Enable FFS soft updates support
 options        UFS_ACL                 # Support for access control lists

Modified: head/sys/mips/conf/XLR64
==============================================================================
--- head/sys/mips/conf/XLR64    Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/mips/conf/XLR64    Wed Oct 12 02:16:42 2016        (r307082)
@@ -36,6 +36,7 @@ options       SMP
 #options       FULL_PREEMPTION         # Enable kernel thread preemption
 options        INET                    # InterNETworking
 options        INET6                   # IPv6 communications protocols
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        FFS                     # Berkeley Fast Filesystem
 #options       SOFTUPDATES             # Enable FFS soft updates support
 options        UFS_ACL                 # Support for access control lists

Modified: head/sys/mips/conf/XLRN32
==============================================================================
--- head/sys/mips/conf/XLRN32   Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/mips/conf/XLRN32   Wed Oct 12 02:16:42 2016        (r307082)
@@ -36,6 +36,7 @@ options       PREEMPTION              # Enable kernel thr
 #options       FULL_PREEMPTION         # Enable kernel thread preemption
 options        INET                    # InterNETworking
 options        INET6                   # IPv6 communications protocols
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        FFS                     # Berkeley Fast Filesystem
 #options       SOFTUPDATES             # Enable FFS soft updates support
 options        UFS_ACL                 # Support for access control lists

Modified: head/sys/mips/conf/std.AR5312
==============================================================================
--- head/sys/mips/conf/std.AR5312       Wed Oct 12 02:15:06 2016        
(r307081)
+++ head/sys/mips/conf/std.AR5312       Wed Oct 12 02:16:42 2016        
(r307082)
@@ -34,6 +34,7 @@ options       KDB
 options        SCHED_4BSD              #4BSD scheduler
 options        INET                    #InterNETworking
 options        INET6                   # IPv6
+options        TCP_HHOOK               # hhook(9) framework for TCP
 
 # options      NFSCL           #Network Filesystem Client
 

Modified: head/sys/mips/conf/std.AR5315
==============================================================================
--- head/sys/mips/conf/std.AR5315       Wed Oct 12 02:15:06 2016        
(r307081)
+++ head/sys/mips/conf/std.AR5315       Wed Oct 12 02:16:42 2016        
(r307082)
@@ -33,6 +33,7 @@ options       KDB
 options        SCHED_4BSD              #4BSD scheduler
 options        INET                    #InterNETworking
 options        INET6                   # IPv6
+options        TCP_HHOOK               # hhook(9) framework for TCP
 
 # options      NFSCL           #Network Filesystem Client
 

Modified: head/sys/mips/conf/std.AR91XX
==============================================================================
--- head/sys/mips/conf/std.AR91XX       Wed Oct 12 02:15:06 2016        
(r307081)
+++ head/sys/mips/conf/std.AR91XX       Wed Oct 12 02:16:42 2016        
(r307082)
@@ -32,6 +32,7 @@ options       VM_KMEM_SIZE_SCALE=1
 options        SCHED_4BSD              #4BSD scheduler
 options        INET                    #InterNETworking
 options        INET6                   #InterNETworking
+options        TCP_HHOOK               # hhook(9) framework for TCP
 #options       NFSCL                   #Network Filesystem Client
 options        PSEUDOFS                #Pseudo-filesystem framework
 options        _KPOSIX_PRIORITY_SCHEDULING #Posix P1003_1B real-time extensions

Modified: head/sys/mips/conf/std.AR933X
==============================================================================
--- head/sys/mips/conf/std.AR933X       Wed Oct 12 02:15:06 2016        
(r307081)
+++ head/sys/mips/conf/std.AR933X       Wed Oct 12 02:16:42 2016        
(r307082)
@@ -30,6 +30,7 @@ options         ALT_BREAK_TO_DEBUGGER
 options        SCHED_4BSD              #4BSD scheduler
 options        INET                    #InterNETworking
 #options       INET6                   #InterNETworking
+options        TCP_HHOOK               # hhook(9) framework for TCP
 #options       NFSCL                   #Network Filesystem Client
 options        PSEUDOFS                #Pseudo-filesystem framework
 options        _KPOSIX_PRIORITY_SCHEDULING #Posix P1003_1B real-time extensions

Modified: head/sys/mips/conf/std.AR934X
==============================================================================
--- head/sys/mips/conf/std.AR934X       Wed Oct 12 02:15:06 2016        
(r307081)
+++ head/sys/mips/conf/std.AR934X       Wed Oct 12 02:16:42 2016        
(r307082)
@@ -31,6 +31,7 @@ options       ALQ
 options        SCHED_4BSD              #4BSD scheduler
 options        INET                    #InterNETworking
 #options       INET6                   #InterNETworking
+options        TCP_HHOOK               # hhook(9) framework for TCP
 #options       NFSCL                   #Network Filesystem Client
 options        PSEUDOFS                #Pseudo-filesystem framework
 options        _KPOSIX_PRIORITY_SCHEDULING #Posix P1003_1B real-time extensions

Modified: head/sys/mips/conf/std.MALTA
==============================================================================
--- head/sys/mips/conf/std.MALTA        Wed Oct 12 02:15:06 2016        
(r307081)
+++ head/sys/mips/conf/std.MALTA        Wed Oct 12 02:16:42 2016        
(r307082)
@@ -21,6 +21,7 @@ options       KDB
 
 options        SCHED_4BSD              #4BSD scheduler
 options        INET                    #InterNETworking
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        NFSCL                   #Network Filesystem Client
 options        NFS_ROOT                #NFS usable as /, requires NFSCL
 options        PSEUDOFS                #Pseudo-filesystem framework

Modified: head/sys/mips/conf/std.QCA955X
==============================================================================
--- head/sys/mips/conf/std.QCA955X      Wed Oct 12 02:15:06 2016        
(r307081)
+++ head/sys/mips/conf/std.QCA955X      Wed Oct 12 02:16:42 2016        
(r307082)
@@ -35,6 +35,7 @@ options       ALQ
 options        SCHED_4BSD              #4BSD scheduler
 options        INET                    #InterNETworking
 #options       INET6                   #InterNETworking
+options        TCP_HHOOK               # hhook(9) framework for TCP
 #options       NFSCL                   #Network Filesystem Client
 options        PSEUDOFS                #Pseudo-filesystem framework
 options        _KPOSIX_PRIORITY_SCHEDULING #Posix P1003_1B real-time extensions

Modified: head/sys/mips/conf/std.SWARM
==============================================================================
--- head/sys/mips/conf/std.SWARM        Wed Oct 12 02:15:06 2016        
(r307081)
+++ head/sys/mips/conf/std.SWARM        Wed Oct 12 02:16:42 2016        
(r307082)
@@ -20,6 +20,7 @@ options       KDB
 
 options        SCHED_4BSD              #4BSD scheduler
 options        INET                    #InterNETworking
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        NFSCL                   #Network Filesystem Client
 options        NFS_ROOT                #NFS usable as /, requires NFSCL
 options        PSEUDOFS                #Pseudo-filesystem framework

Modified: head/sys/mips/conf/std.XLP
==============================================================================
--- head/sys/mips/conf/std.XLP  Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/mips/conf/std.XLP  Wed Oct 12 02:16:42 2016        (r307082)
@@ -15,6 +15,7 @@ options       PREEMPTION              # Enable kernel thr
 #options       FULL_PREEMPTION         # Enable kernel thread preemption
 options        INET                    # InterNETworking
 options        INET6                   # IPv6 communications protocols
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        FFS                     # Berkeley Fast Filesystem
 #options       SOFTUPDATES             # Enable FFS soft updates support
 options        UFS_ACL                 # Support for access control lists

Modified: head/sys/modules/cc/Makefile
==============================================================================
--- head/sys/modules/cc/Makefile        Wed Oct 12 02:15:06 2016        
(r307081)
+++ head/sys/modules/cc/Makefile        Wed Oct 12 02:16:42 2016        
(r307082)
@@ -1,11 +1,20 @@
 # $FreeBSD$
 
-SUBDIR=        cc_cdg \
-       cc_chd \
-       cc_cubic \
+SUBDIR=        cc_cubic \
        cc_dctcp \
+       cc_htcp
+
+
+# Do we have the TCP_HHOOK symbol defined? If not, there is no point in
+# building these modules by default.
+# We will default to building these modules unless $OPT_INET is defined
+# and does not contain the TCP_HHOOK option.
+.if defined(ALL_MODULES) || ${OPT_INET:UTCP_HHOOK:MTCP_HHOOK} != ""
+SUBDIR+= \
+       cc_cdg \
+       cc_chd \
        cc_hd \
-       cc_htcp \
        cc_vegas
+.endif
 
 .include <bsd.subdir.mk>

Modified: head/sys/modules/khelp/Makefile
==============================================================================
--- head/sys/modules/khelp/Makefile     Wed Oct 12 02:15:06 2016        
(r307081)
+++ head/sys/modules/khelp/Makefile     Wed Oct 12 02:16:42 2016        
(r307082)
@@ -1,5 +1,13 @@
 # $FreeBSD$
 
-SUBDIR=        h_ertt
+SUBDIR=        
+
+# Do we have the TCP_HHOOK symbol defined? If not, there is no point in
+# building this modules by default.
+# We will default to building this module unless $OPT_INET is defined
+# and does not contain the TCP_HHOOK option.
+.if defined(ALL_MODULES) || ${OPT_INET:UTCP_HHOOK:MTCP_HHOOK} != ""
+SUBDIR+=       h_ertt
+.endif
 
 .include <bsd.subdir.mk>

Modified: head/sys/netinet/tcp_input.c
==============================================================================
--- head/sys/netinet/tcp_input.c        Wed Oct 12 02:15:06 2016        
(r307081)
+++ head/sys/netinet/tcp_input.c        Wed Oct 12 02:16:42 2016        
(r307082)
@@ -57,7 +57,9 @@ __FBSDID("$FreeBSD$");
 
 #include <sys/param.h>
 #include <sys/kernel.h>
+#ifdef TCP_HHOOK
 #include <sys/hhook.h>
+#endif
 #include <sys/malloc.h>
 #include <sys/mbuf.h>
 #include <sys/proc.h>          /* for proc0 declaration */
@@ -278,6 +280,7 @@ kmod_tcpstat_inc(int statnum)
        counter_u64_add(VNET(tcpstat)[statnum], 1);
 }
 
+#ifdef TCP_HHOOK
 /*
  * Wrapper for the TCP established input helper hook.
  */
@@ -295,6 +298,7 @@ hhook_run_tcp_est_in(struct tcpcb *tp, s
                    tp->osd);
        }
 }
+#endif
 
 /*
  * CC wrapper hook functions
@@ -1753,8 +1757,10 @@ tcp_do_segment(struct mbuf *m, struct tc
                                }
                                acked = BYTES_THIS_ACK(tp, th);
 
+#ifdef TCP_HHOOK
                                /* Run HHOOK_TCP_ESTABLISHED_IN helper hooks. */
                                hhook_run_tcp_est_in(tp, th, &to);
+#endif
 
                                TCPSTAT_ADD(tcps_rcvackpack, nsegs);
                                TCPSTAT_ADD(tcps_rcvackbyte, acked);
@@ -2499,8 +2505,10 @@ tcp_do_segment(struct mbuf *m, struct tc
                         */
                        tp->sackhint.sacked_bytes = 0;
 
+#ifdef TCP_HHOOK
                /* Run HHOOK_TCP_ESTABLISHED_IN helper hooks. */
                hhook_run_tcp_est_in(tp, th, &to);
+#endif
 
                if (SEQ_LEQ(th->th_ack, tp->snd_una)) {
                        u_int maxseg;

Modified: head/sys/netinet/tcp_output.c
==============================================================================
--- head/sys/netinet/tcp_output.c       Wed Oct 12 02:15:06 2016        
(r307081)
+++ head/sys/netinet/tcp_output.c       Wed Oct 12 02:16:42 2016        
(r307082)
@@ -40,7 +40,9 @@ __FBSDID("$FreeBSD$");
 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/domain.h>
+#ifdef TCP_HHOOK
 #include <sys/hhook.h>
+#endif
 #include <sys/kernel.h>
 #include <sys/lock.h>
 #include <sys/mbuf.h>
@@ -140,11 +142,14 @@ SYSCTL_INT(_net_inet_tcp, OID_AUTO, send
            tcp_timer_active((tp), TT_PERSIST),                         \
            ("neither rexmt nor persist timer is set"))
 
+#ifdef TCP_HHOOK
 static void inline     hhook_run_tcp_est_out(struct tcpcb *tp,
                            struct tcphdr *th, struct tcpopt *to,
                            uint32_t len, int tso);
+#endif
 static void inline     cc_after_idle(struct tcpcb *tp);
 
+#ifdef TCP_HHOOK
 /*
  * Wrapper for the TCP established output helper hook.
  */
@@ -165,6 +170,7 @@ hhook_run_tcp_est_out(struct tcpcb *tp, 
                    tp->osd);
        }
 }
+#endif
 
 /*
  * CC wrapper hook functions
@@ -1306,8 +1312,10 @@ send:
            __func__, len, hdrlen, ipoptlen, m_length(m, NULL)));
 #endif
 
+#ifdef TCP_HHOOK
        /* Run HHOOK_TCP_ESTABLISHED_OUT helper hooks. */
        hhook_run_tcp_est_out(tp, th, &to, len, tso);
+#endif
 
 #ifdef TCPDEBUG
        /*

Modified: head/sys/netinet/tcp_stacks/fastpath.c
==============================================================================
--- head/sys/netinet/tcp_stacks/fastpath.c      Wed Oct 12 02:15:06 2016        
(r307081)
+++ head/sys/netinet/tcp_stacks/fastpath.c      Wed Oct 12 02:16:42 2016        
(r307082)
@@ -62,7 +62,9 @@ __FBSDID("$FreeBSD$");
 #include <sys/param.h>
 #include <sys/module.h>
 #include <sys/kernel.h>
+#ifdef TCP_HHOOK
 #include <sys/hhook.h>
+#endif
 #include <sys/malloc.h>
 #include <sys/mbuf.h>
 #include <sys/proc.h>          /* for proc0 declaration */
@@ -266,8 +268,10 @@ tcp_do_fastack(struct mbuf *m, struct tc
        if (winup_only == 0) {
                acked = BYTES_THIS_ACK(tp, th);
 
+#ifdef TCP_HHOOK
                /* Run HHOOK_TCP_ESTABLISHED_IN helper hooks. */
                hhook_run_tcp_est_in(tp, th, to);
+#endif
 
                TCPSTAT_ADD(tcps_rcvackbyte, acked);
                sbdrop(&so->so_snd, acked);
@@ -1040,8 +1044,10 @@ tcp_do_slowpath(struct mbuf *m, struct t
                         */
                        tp->sackhint.sacked_bytes = 0;
 
+#ifdef TCP_HHOOK
                /* Run HHOOK_TCP_ESTABLISHED_IN helper hooks. */
                hhook_run_tcp_est_in(tp, th, to);
+#endif
 
                if (SEQ_LEQ(th->th_ack, tp->snd_una)) {
                        if (tlen == 0 && tiwin == tp->snd_wnd) {
@@ -2127,8 +2133,10 @@ tcp_fastack(struct mbuf *m, struct tcphd
        if (winup_only == 0) {
                acked = BYTES_THIS_ACK(tp, th);
 
+#ifdef TCP_HHOOK
                /* Run HHOOK_TCP_ESTABLISHED_IN helper hooks. */
                hhook_run_tcp_est_in(tp, th, to);
+#endif
 
                TCPSTAT_ADD(tcps_rcvackbyte, acked);
                sbdrop(&so->so_snd, acked);

Modified: head/sys/netinet/tcp_subr.c
==============================================================================
--- head/sys/netinet/tcp_subr.c Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/netinet/tcp_subr.c Wed Oct 12 02:16:42 2016        (r307082)
@@ -42,9 +42,13 @@ __FBSDID("$FreeBSD$");
 #include <sys/systm.h>
 #include <sys/callout.h>
 #include <sys/eventhandler.h>
+#ifdef TCP_HHOOK
 #include <sys/hhook.h>
+#endif
 #include <sys/kernel.h>
+#ifdef TCP_HHOOK
 #include <sys/khelp.h>
+#endif
 #include <sys/sysctl.h>
 #include <sys/jail.h>
 #include <sys/malloc.h>
@@ -238,7 +242,9 @@ SYSCTL_INT(_net_inet_tcp, OID_AUTO, sign
 VNET_DEFINE(uma_zone_t, sack_hole_zone);
 #define        V_sack_hole_zone                VNET(sack_hole_zone)
 
+#ifdef TCP_HHOOK
 VNET_DEFINE(struct hhook_head *, tcp_hhh[HHOOK_TCP_LAST+1]);
+#endif
 
 static struct inpcb *tcp_notify(struct inpcb *, int);
 static struct inpcb *tcp_mtudisc_notify(struct inpcb *, int);
@@ -449,7 +455,9 @@ struct tcpcb_mem {
        struct  tcpcb           tcb;
        struct  tcp_timer       tt;
        struct  cc_var          ccv;
+#ifdef TCP_HHOOK
        struct  osd             osd;
+#endif
 };
 
 static VNET_DEFINE(uma_zone_t, tcpcb_zone);
@@ -605,12 +613,14 @@ tcp_init(void)
 
        tcbhash_tuneable = "net.inet.tcp.tcbhashsize";
 
+#ifdef TCP_HHOOK
        if (hhook_head_register(HHOOK_TYPE_TCP, HHOOK_TCP_EST_IN,
            &V_tcp_hhh[HHOOK_TCP_EST_IN], HHOOK_NOWAIT|HHOOK_HEADISINVNET) != 0)
                printf("%s: WARNING: unable to register helper hook\n", 
__func__);
        if (hhook_head_register(HHOOK_TYPE_TCP, HHOOK_TCP_EST_OUT,
            &V_tcp_hhh[HHOOK_TCP_EST_OUT], HHOOK_NOWAIT|HHOOK_HEADISINVNET) != 
0)
                printf("%s: WARNING: unable to register helper hook\n", 
__func__);
+#endif
        hashsize = TCBHASHSIZE;
        TUNABLE_INT_FETCH(tcbhash_tuneable, &hashsize);
        if (hashsize == 0) {
@@ -763,6 +773,7 @@ tcp_destroy(void *unused __unused)
        tcp_fastopen_destroy();
 #endif
 
+#ifdef TCP_HHOOK
        error = hhook_head_deregister(V_tcp_hhh[HHOOK_TCP_EST_IN]);
        if (error != 0) {
                printf("%s: WARNING: unable to deregister helper hook "
@@ -775,6 +786,7 @@ tcp_destroy(void *unused __unused)
                    "type=%d, id=%d: error %d returned\n", __func__,
                    HHOOK_TYPE_TCP, HHOOK_TCP_EST_OUT, error);
        }
+#endif
 }
 VNET_SYSUNINIT(tcp, SI_SUB_PROTO_DOMAIN, SI_ORDER_FOURTH, tcp_destroy, NULL);
 #endif
@@ -1204,6 +1216,7 @@ tcp_newtcpcb(struct inpcb *inp)
                        return (NULL);
                }
 
+#ifdef TCP_HHOOK
        tp->osd = &tm->osd;
        if (khelp_init_osd(HELPER_CLASS_TCP, tp->osd)) {
                if (tp->t_fb->tfb_tcp_fb_fini)
@@ -1212,6 +1225,7 @@ tcp_newtcpcb(struct inpcb *inp)
                uma_zfree(V_tcpcb_zone, tm);
                return (NULL);
        }
+#endif
 
 #ifdef VIMAGE
        tp->t_vnet = inp->inp_vnet;
@@ -1477,7 +1491,9 @@ tcp_discardcb(struct tcpcb *tp)
        if (CC_ALGO(tp)->cb_destroy != NULL)
                CC_ALGO(tp)->cb_destroy(tp->ccv);
 
+#ifdef TCP_HHOOK
        khelp_destroy_osd(tp->osd);
+#endif
 
        CC_ALGO(tp) = NULL;
        inp->inp_ppcb = NULL;

Modified: head/sys/netinet/tcp_var.h
==============================================================================
--- head/sys/netinet/tcp_var.h  Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/netinet/tcp_var.h  Wed Oct 12 02:16:42 2016        (r307082)
@@ -749,8 +749,10 @@ VNET_DECLARE(int, tcp_ecn_maxretries);
 #define        V_tcp_do_ecn            VNET(tcp_do_ecn)
 #define        V_tcp_ecn_maxretries    VNET(tcp_ecn_maxretries)
 
+#ifdef TCP_HHOOK
 VNET_DECLARE(struct hhook_head *, tcp_hhh[HHOOK_TCP_LAST + 1]);
 #define        V_tcp_hhh               VNET(tcp_hhh)
+#endif
 
 VNET_DECLARE(int, tcp_do_rfc6675_pipe);
 #define V_tcp_do_rfc6675_pipe  VNET(tcp_do_rfc6675_pipe)
@@ -788,8 +790,10 @@ void       cc_ack_received(struct tcpcb *tp, s
 void   cc_conn_init(struct tcpcb *tp);
 void   cc_post_recovery(struct tcpcb *tp, struct tcphdr *th);
 void   cc_cong_signal(struct tcpcb *tp, struct tcphdr *th, uint32_t type);
+#ifdef TCP_HHOOK
 void   hhook_run_tcp_est_in(struct tcpcb *tp,
                            struct tcphdr *th, struct tcpopt *to);
+#endif
 
 int     tcp_input(struct mbuf **, int *, int);
 void    tcp_do_segment(struct mbuf *, struct tcphdr *,

Modified: head/sys/pc98/conf/GENERIC
==============================================================================
--- head/sys/pc98/conf/GENERIC  Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/pc98/conf/GENERIC  Wed Oct 12 02:16:42 2016        (r307082)
@@ -30,6 +30,7 @@ options       SCHED_4BSD              # 4BSD scheduler
 options        INET                    # InterNETworking
 options        INET6                   # IPv6 communications protocols
 options        IPSEC                   # IP (v4/v6) security
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        SCTP                    # Stream Control Transmission Protocol
 options        FFS                     # Berkeley Fast Filesystem
 options        SOFTUPDATES             # Enable FFS soft updates support

Modified: head/sys/powerpc/conf/GENERIC
==============================================================================
--- head/sys/powerpc/conf/GENERIC       Wed Oct 12 02:15:06 2016        
(r307081)
+++ head/sys/powerpc/conf/GENERIC       Wed Oct 12 02:16:42 2016        
(r307082)
@@ -38,6 +38,7 @@ options       PREEMPTION              #Enable kernel thre
 options        INET                    #InterNETworking
 options        INET6                   #IPv6 communications protocols
 options        IPSEC                   # IP (v4/v6) security
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        SCTP                    #Stream Control Transmission Protocol
 options        FFS                     #Berkeley Fast Filesystem
 options        SOFTUPDATES             #Enable FFS soft updates support

Modified: head/sys/powerpc/conf/GENERIC64
==============================================================================
--- head/sys/powerpc/conf/GENERIC64     Wed Oct 12 02:15:06 2016        
(r307081)
+++ head/sys/powerpc/conf/GENERIC64     Wed Oct 12 02:16:42 2016        
(r307082)
@@ -37,6 +37,7 @@ options       SCHED_ULE               #ULE scheduler
 options        PREEMPTION              #Enable kernel thread preemption
 options        INET                    #InterNETworking
 options        INET6                   #IPv6 communications protocols
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        SCTP                    #Stream Control Transmission Protocol
 options        FFS                     #Berkeley Fast Filesystem
 options        SOFTUPDATES             #Enable FFS soft updates support

Modified: head/sys/powerpc/conf/MPC85XX
==============================================================================
--- head/sys/powerpc/conf/MPC85XX       Wed Oct 12 02:15:06 2016        
(r307081)
+++ head/sys/powerpc/conf/MPC85XX       Wed Oct 12 02:16:42 2016        
(r307082)
@@ -36,6 +36,7 @@ options       GDB
 options        GEOM_PART_GPT
 options        INET
 options        INET6
+options        TCP_HHOOK               # hhook(9) framework for TCP
 options        INVARIANTS
 options        INVARIANT_SUPPORT
 options        KDB

Modified: head/sys/riscv/conf/GENERIC
==============================================================================
--- head/sys/riscv/conf/GENERIC Wed Oct 12 02:15:06 2016        (r307081)
+++ head/sys/riscv/conf/GENERIC Wed Oct 12 02:16:42 2016        (r307082)
@@ -32,6 +32,7 @@ options       SCHED_ULE               # ULE scheduler
 options        PREEMPTION              # Enable kernel thread preemption
 options        INET                    # InterNETworking

*** DIFF OUTPUT TRUNCATED AT 1000 LINES ***
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