* [PATCH 01/13 RFC net-next] net: ipv4: introduce CONFIG_IPV4 to decouple the IPv4 stack
[not found] <20260712013941.4570-1-fmancera@suse.de>
@ 2026-07-12 1:38 ` Fernando Fernandez Mancera
2026-07-12 11:01 ` Arnd Bergmann
0 siblings, 1 reply; 2+ messages in thread
From: Fernando Fernandez Mancera @ 2026-07-12 1:38 UTC (permalink / raw)
To: netdev
Cc: davem, edumazet, kuba, pabeni, dsahern, horms, idosch,
Fernando Fernandez Mancera, Jason Gunthorpe, Leon Romanovsky,
Andrew Lunn, Tony Nguyen, Przemek Kitszel, Elad Nachman,
Saeed Mahameed, Tariq Toukan, Mark Bloch, Petr Machata,
Edward Cree, Maxime Coquelin, Alexandre Torgue, Arend van Spriel,
Miri Korenblit, Keith Busch, Jens Axboe, Christoph Hellwig,
Sagi Grimberg, Chaitanya Kulkarni, Saurav Kashyap, Javed Hasan,
GR-QLogic-Storage-Upstream, James E.J. Bottomley,
Martin K. Petersen, Nilesh Javali, Manish Rangankar,
Varun Prakash, Alexander Viro, Christian Brauner, Jan Kara,
David Howells, Marc Dionne, Trond Myklebust, Anna Schumaker,
Chuck Lever, Jeff Layton, NeilBrown, Olga Kornievskaia, Dai Ngo,
Tom Talpey, Marek Lindner, Simon Wunderlich, Antonio Quartulli,
Sven Eckelmann, Nikolay Aleksandrov, Pablo Neira Ayuso,
Florian Westphal, Phil Sutter, Johannes Berg, Matthieu Baerts,
Mat Martineau, Geliang Tang, Julian Anastasov, Aaron Conole,
Eelco Chaudron, Ilya Maximets, Allison Henderson,
Jamal Hadi Salim, Jiri Pirko, Marcelo Ricardo Leitner, Xin Long,
D. Wythe, Dust Li, Sidraya Jayagond, Wenjia Zhang,
Mahanta Jambigi, Tony Lu, Wen Gu, Jon Maloy, Steffen Klassert,
Herbert Xu, Vikas Gupta, Rajashekar Hudumula, Justin Chen,
Bhargava Marreddy, Arnd Bergmann, Nicolai Buchwitz,
Florian Fainelli, Heiner Kallweit, Krzysztof Kozlowski,
Russell King (Oracle), Yao Zi, Yanteng Si, Maxime Chevallier,
Julian Braha, Joey Lu, Shangjuan Wei, Chen-Yu Tsai, Inochi Amaoto,
Lad Prabhakar, Qingfang Deng, Greg Kroah-Hartman, Eric Biggers,
Ethan Nelson-Moore, Ard Biesheuvel, Dmitry Safonov,
Kuniyuki Iwashima, Alyssa Ross, linux-rdma, linux-kernel,
intel-wired-lan, oss-drivers, linux-net-drivers, linux-stm32,
linux-arm-kernel, linux-wireless, brcm80211,
brcm80211-dev-list.pdl, linux-nvme, linux-scsi, target-devel,
linux-fsdevel, linux-afs, linux-nfs, b.a.t.m.a.n, bridge,
netfilter-devel, coreteam, mptcp, lvs-devel, dev, rds-devel,
linux-sctp, linux-s390, tipc-discussion
Historically, the IPv4 protocol has been linked to the core INET
subsystem. Because shared infrastructure like the TCP/UDP engine,
routing or INET hashtables live inside net/ipv4/, it has been impossible
to compile a kernel with only IPv6 support.
This patch introduces the CONFIG_IPV4 Kconfig symbol, which is set to
'def_bool y' for now. This does not allow to completely disable the
IPv4 stack yet but it lays the necessary build-system work for that
goal.
In addition, multiple subsystems Kconfig symbols across networking
features like tunnels, drivers and filesystems have been adjusted to
depend on IPv4. Keep on mind that follow-up work is required to convert
the Kconfig symbol to bool and remove the dependency on IPv4 where it
makes sense.
Signed-off-by: Fernando Fernandez Mancera <fmancera@suse.de>
---
drivers/infiniband/Kconfig | 2 +-
drivers/net/Kconfig | 24 ++++++++++---------
drivers/net/ethernet/broadcom/Kconfig | 2 ++
drivers/net/ethernet/chelsio/Kconfig | 2 +-
drivers/net/ethernet/intel/Kconfig | 2 ++
drivers/net/ethernet/marvell/prestera/Kconfig | 1 +
.../net/ethernet/mellanox/mlx5/core/Kconfig | 3 ++-
drivers/net/ethernet/mellanox/mlxsw/Kconfig | 1 +
drivers/net/ethernet/netronome/Kconfig | 1 +
drivers/net/ethernet/qlogic/Kconfig | 2 ++
drivers/net/ethernet/sfc/Kconfig | 1 +
drivers/net/ethernet/stmicro/stmmac/Kconfig | 1 +
drivers/net/ethernet/via/Kconfig | 1 +
drivers/net/ppp/Kconfig | 1 +
.../broadcom/brcm80211/brcmfmac/Kconfig | 1 +
drivers/net/wireless/intel/iwlwifi/Kconfig | 1 +
drivers/nvme/host/Kconfig | 2 +-
drivers/nvme/target/Kconfig | 2 +-
drivers/scsi/bnx2fc/Kconfig | 1 +
drivers/scsi/bnx2i/Kconfig | 1 +
drivers/scsi/cxgbi/cxgb3i/Kconfig | 2 +-
drivers/scsi/cxgbi/cxgb4i/Kconfig | 2 +-
drivers/target/iscsi/Kconfig | 2 +-
fs/Kconfig | 1 +
fs/afs/Kconfig | 2 +-
fs/nfs/Kconfig | 2 +-
fs/nfsd/Kconfig | 2 +-
net/Kconfig | 6 ++---
net/batman-adv/Kconfig | 1 +
net/bridge/Kconfig | 3 ++-
net/bridge/netfilter/Kconfig | 6 ++---
net/ipv4/Kconfig | 21 +++++++++++++---
net/ipv4/Makefile | 21 ++++++++--------
net/ipv4/netfilter/Kconfig | 2 +-
net/ipv6/Kconfig | 17 +++++++++----
net/ipv6/netfilter/Kconfig | 2 +-
net/l2tp/Kconfig | 2 +-
net/mac80211/Kconfig | 2 +-
net/mpls/Kconfig | 1 +
net/mptcp/Kconfig | 2 +-
net/netfilter/Kconfig | 2 +-
net/netfilter/ipset/Kconfig | 2 +-
net/netfilter/ipvs/Kconfig | 2 +-
net/openvswitch/Kconfig | 2 +-
net/packet/Kconfig | 1 +
net/rds/Kconfig | 2 +-
net/rxrpc/Kconfig | 2 +-
net/sched/Kconfig | 2 +-
net/sctp/Kconfig | 2 +-
net/smc/Kconfig | 2 +-
net/sunrpc/Kconfig | 2 +-
net/tipc/Kconfig | 2 +-
net/xfrm/Kconfig | 12 ++++++++--
53 files changed, 121 insertions(+), 65 deletions(-)
diff --git a/drivers/infiniband/Kconfig b/drivers/infiniband/Kconfig
index 086195758a8a..e9302002b6ea 100644
--- a/drivers/infiniband/Kconfig
+++ b/drivers/infiniband/Kconfig
@@ -3,7 +3,7 @@ menuconfig INFINIBAND
tristate "InfiniBand support"
depends on HAS_IOMEM && HAS_DMA
depends on NET
- depends on INET
+ depends on INET && IPV4
depends on !ALPHA
select DMA_SHARED_BUFFER
select IRQ_POLL
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index ff79c466712d..8e66b3015698 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -40,7 +40,7 @@ if NET_CORE
config BONDING
tristate "Bonding driver support"
- depends on INET
+ depends on INET && IPV4
depends on TLS || TLS_DEVICE=n
help
Say 'Y' or 'M' if you wish to be able to 'bond' multiple Ethernet
@@ -73,7 +73,7 @@ config DUMMY
config WIREGUARD
tristate "WireGuard secure network tunnel"
- depends on NET && INET
+ depends on NET && INET && IPV4
select NET_UDP_TUNNEL
select DST_CACHE
select CRYPTO_LIB_CURVE25519
@@ -102,7 +102,7 @@ config WIREGUARD_DEBUG
config OVPN
tristate "OpenVPN data channel offload"
- depends on NET && INET
+ depends on NET && INET && IPV4
select DST_CACHE
select NET_UDP_TUNNEL
select CRYPTO
@@ -164,6 +164,7 @@ source "drivers/net/team/Kconfig"
config MACVLAN
tristate "MAC-VLAN support"
+ depends on IPV4
help
This allows one to create virtual interfaces that map packets to
or from specific MAC addresses to a particular interface.
@@ -198,7 +199,7 @@ config IPVLAN_L3S
config IPVLAN
tristate "IP-VLAN support"
- depends on INET
+ depends on INET && IPV4
help
This allows one to create virtual devices off of a main interface
and packets will be delivered based on the dest L3 (IPv6/IPv4 addr)
@@ -229,7 +230,7 @@ config IPVTAP
config VXLAN
tristate "Virtual eXtensible Local Area Network (VXLAN)"
- depends on INET
+ depends on INET && IPV4
select NET_UDP_TUNNEL
select GRO_CELLS
help
@@ -244,7 +245,7 @@ config VXLAN
config GENEVE
tristate "Generic Network Virtualization Encapsulation"
- depends on INET
+ depends on INET && IPV4
select NET_UDP_TUNNEL
select GRO_CELLS
help
@@ -259,7 +260,7 @@ config GENEVE
config BAREUDP
tristate "Bare UDP Encapsulation"
- depends on INET
+ depends on INET && IPV4
select NET_UDP_TUNNEL
select GRO_CELLS
help
@@ -271,7 +272,7 @@ config BAREUDP
config GTP
tristate "GPRS Tunneling Protocol datapath (GTP-U)"
- depends on INET
+ depends on INET && IPV4
select NET_UDP_TUNNEL
help
This allows one to create gtp virtual interfaces that provide
@@ -288,7 +289,7 @@ config GTP
config PFCP
tristate "Packet Forwarding Control Protocol (PFCP)"
- depends on INET
+ depends on INET && IPV4
select NET_UDP_TUNNEL
help
This allows one to create PFCP virtual interfaces that allows to
@@ -301,7 +302,7 @@ config PFCP
config AMT
tristate "Automatic Multicast Tunneling (AMT)"
- depends on INET && IP_MULTICAST
+ depends on INET && IP_MULTICAST && IPV4
select NET_UDP_TUNNEL
help
This allows one to create AMT(Automatic Multicast Tunneling)
@@ -471,6 +472,7 @@ config NETKIT
config NET_VRF
tristate "Virtual Routing and Forwarding (Lite)"
+ depends on IPV4
depends on IP_MULTIPLE_TABLES
depends on NET_L3_MASTER_DEV
depends on IPV6_MULTIPLE_TABLES || IPV6=n
@@ -604,7 +606,7 @@ source "drivers/net/hyperv/Kconfig"
config NETDEVSIM
tristate "Simulated networking device"
depends on DEBUG_FS
- depends on INET
+ depends on INET && IPV4
depends on PSAMPLE || PSAMPLE=n
depends on PTP_1588_CLOCK_MOCK || PTP_1588_CLOCK_MOCK=n
select NET_DEVLINK
diff --git a/drivers/net/ethernet/broadcom/Kconfig b/drivers/net/ethernet/broadcom/Kconfig
index f0bac0dd1439..02469b439127 100644
--- a/drivers/net/ethernet/broadcom/Kconfig
+++ b/drivers/net/ethernet/broadcom/Kconfig
@@ -97,6 +97,7 @@ config BNX2
config CNIC
tristate "QLogic CNIC support"
+ depends on IPV4
depends on PCI
select BNX2
select UIO
@@ -208,6 +209,7 @@ config BNXT
tristate "Broadcom NetXtreme-C/E support"
depends on PCI
depends on PTP_1588_CLOCK_OPTIONAL
+ depends on IPV4
select FW_LOADER
select CRC32
select NET_DEVLINK
diff --git a/drivers/net/ethernet/chelsio/Kconfig b/drivers/net/ethernet/chelsio/Kconfig
index 96d7779cd2f0..c738820688e0 100644
--- a/drivers/net/ethernet/chelsio/Kconfig
+++ b/drivers/net/ethernet/chelsio/Kconfig
@@ -48,7 +48,7 @@ config CHELSIO_T1_1G
config CHELSIO_T3
tristate "Chelsio Communications T3 10Gb Ethernet support"
- depends on PCI && INET
+ depends on PCI && INET && IPV4
select FW_LOADER
select MDIO
help
diff --git a/drivers/net/ethernet/intel/Kconfig b/drivers/net/ethernet/intel/Kconfig
index 288fa8ce53af..d975e41a2b68 100644
--- a/drivers/net/ethernet/intel/Kconfig
+++ b/drivers/net/ethernet/intel/Kconfig
@@ -193,6 +193,7 @@ config IXGBE_DCB
config IXGBE_IPSEC
bool "IPSec XFRM cryptography-offload acceleration"
+ depends on IPV4
depends on IXGBE
depends on XFRM_OFFLOAD
default y
@@ -219,6 +220,7 @@ config IXGBEVF
config IXGBEVF_IPSEC
bool "IPSec XFRM cryptography-offload acceleration"
+ depends on IPV4
depends on IXGBEVF
depends on XFRM_OFFLOAD
default y
diff --git a/drivers/net/ethernet/marvell/prestera/Kconfig b/drivers/net/ethernet/marvell/prestera/Kconfig
index f2f7663c3d10..4c7486c7e706 100644
--- a/drivers/net/ethernet/marvell/prestera/Kconfig
+++ b/drivers/net/ethernet/marvell/prestera/Kconfig
@@ -7,6 +7,7 @@ config PRESTERA
tristate "Marvell Prestera Switch ASICs support"
depends on NET_SWITCHDEV && VLAN_8021Q
depends on BRIDGE || BRIDGE=n
+ depends on IPV4
select NET_DEVLINK
select PHYLINK
help
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/Kconfig b/drivers/net/ethernet/mellanox/mlx5/core/Kconfig
index 925ee25d05b4..86b0884968b6 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/Kconfig
+++ b/drivers/net/ethernet/mellanox/mlx5/core/Kconfig
@@ -12,6 +12,7 @@ config MLX5_CORE
depends on PTP_1588_CLOCK_OPTIONAL
depends on PCI_HYPERV_INTERFACE || !PCI_HYPERV_INTERFACE
depends on HWMON || !HWMON
+ depends on IPV4
help
Core driver for low level functionality of the ConnectX-4 and
Connect-IB cards by Mellanox Technologies.
@@ -28,7 +29,7 @@ config MLX5_FPGA
config MLX5_CORE_EN
bool "Mellanox 5th generation network adapters (ConnectX series) Ethernet support"
- depends on NETDEVICES && ETHERNET && INET && PCI && MLX5_CORE
+ depends on NETDEVICES && ETHERNET && INET && PCI && MLX5_CORE && IPV4
select PAGE_POOL
select PAGE_POOL_STATS
select DIMLIB
diff --git a/drivers/net/ethernet/mellanox/mlxsw/Kconfig b/drivers/net/ethernet/mellanox/mlxsw/Kconfig
index 2229a2694aa5..d12c33044a1d 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/Kconfig
+++ b/drivers/net/ethernet/mellanox/mlxsw/Kconfig
@@ -53,6 +53,7 @@ config MLXSW_I2C
config MLXSW_SPECTRUM
tristate "Mellanox Technologies Spectrum family support"
+ depends on IPV4
depends on MLXSW_CORE && MLXSW_PCI && NET_SWITCHDEV && VLAN_8021Q
depends on PSAMPLE || PSAMPLE=n
depends on BRIDGE || BRIDGE=n
diff --git a/drivers/net/ethernet/netronome/Kconfig b/drivers/net/ethernet/netronome/Kconfig
index d115d16d4649..2ac3f89e1f26 100644
--- a/drivers/net/ethernet/netronome/Kconfig
+++ b/drivers/net/ethernet/netronome/Kconfig
@@ -18,6 +18,7 @@ if NET_VENDOR_NETRONOME
config NFP
tristate "Netronome(R) NFP4000/NFP6000 NIC driver"
+ depends on IPV4
depends on PCI_MSI
depends on VXLAN || VXLAN=n
depends on TLS && TLS_DEVICE || TLS_DEVICE=n
diff --git a/drivers/net/ethernet/qlogic/Kconfig b/drivers/net/ethernet/qlogic/Kconfig
index 1203353238e5..d198f6add1a8 100644
--- a/drivers/net/ethernet/qlogic/Kconfig
+++ b/drivers/net/ethernet/qlogic/Kconfig
@@ -29,6 +29,7 @@ config QLA3XXX
config QLCNIC
tristate "QLOGIC QLCNIC 1/10Gb Converged Ethernet NIC Support"
depends on PCI
+ depends on IPV4
select FW_LOADER
help
This driver supports QLogic QLE8240 and QLE8242 Converged Ethernet
@@ -68,6 +69,7 @@ config QLCNIC_HWMON
config NETXEN_NIC
tristate "NetXen Multi port (1/10) Gigabit Ethernet NIC"
+ depends on IPV4
depends on PCI
select FW_LOADER
help
diff --git a/drivers/net/ethernet/sfc/Kconfig b/drivers/net/ethernet/sfc/Kconfig
index 979f2801e2a8..d2e32e8ffce8 100644
--- a/drivers/net/ethernet/sfc/Kconfig
+++ b/drivers/net/ethernet/sfc/Kconfig
@@ -18,6 +18,7 @@ if NET_VENDOR_SOLARFLARE
config SFC
tristate "Solarflare SFC9100/EF100-family support"
+ depends on IPV4
depends on PCI
depends on PTP_1588_CLOCK_OPTIONAL
select MDIO
diff --git a/drivers/net/ethernet/stmicro/stmmac/Kconfig b/drivers/net/ethernet/stmicro/stmmac/Kconfig
index e3dd5adda5ac..4ac59a43d71c 100644
--- a/drivers/net/ethernet/stmicro/stmmac/Kconfig
+++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig
@@ -1,6 +1,7 @@
# SPDX-License-Identifier: GPL-2.0-only
config STMMAC_ETH
tristate "STMicroelectronics Multi-Gigabit Ethernet driver"
+ depends on IPV4
depends on HAS_IOMEM && HAS_DMA
depends on PTP_1588_CLOCK_OPTIONAL
depends on ETHTOOL_NETLINK
diff --git a/drivers/net/ethernet/via/Kconfig b/drivers/net/ethernet/via/Kconfig
index 00773f5e4d7e..a62eb98f2e27 100644
--- a/drivers/net/ethernet/via/Kconfig
+++ b/drivers/net/ethernet/via/Kconfig
@@ -45,6 +45,7 @@ config VIA_RHINE_MMIO
config VIA_VELOCITY
tristate "VIA Velocity support"
+ depends on IPV4
depends on (PCI || (OF_ADDRESS && OF_IRQ))
depends on HAS_DMA
select CRC32
diff --git a/drivers/net/ppp/Kconfig b/drivers/net/ppp/Kconfig
index 4047f13b83dc..16826da75d1e 100644
--- a/drivers/net/ppp/Kconfig
+++ b/drivers/net/ppp/Kconfig
@@ -160,6 +160,7 @@ config PPPOE_HASH_BITS
config PPTP
tristate "PPP over IPv4 (PPTP)"
+ depends on IPV4
depends on NET_IPGRE_DEMUX
select PPPOX
help
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/Kconfig b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/Kconfig
index 32794c1eca23..95d685f165ea 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/Kconfig
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/Kconfig
@@ -1,6 +1,7 @@
config BRCMFMAC
tristate "Broadcom FullMAC WLAN driver"
depends on CFG80211
+ depends on IPV4
select BRCMUTIL
help
This module adds support for wireless adapters based on Broadcom
diff --git a/drivers/net/wireless/intel/iwlwifi/Kconfig b/drivers/net/wireless/intel/iwlwifi/Kconfig
index 153a8368b412..d2efd96cd513 100644
--- a/drivers/net/wireless/intel/iwlwifi/Kconfig
+++ b/drivers/net/wireless/intel/iwlwifi/Kconfig
@@ -2,6 +2,7 @@
config IWLWIFI
tristate "Intel Wireless WiFi Next Gen AGN - Wireless-N/Advanced-N/Ultimate-N (iwlwifi) "
depends on PCI && HAS_IOMEM && CFG80211
+ depends on IPV4
depends on IWLMEI || !IWLMEI
select FW_LOADER
help
diff --git a/drivers/nvme/host/Kconfig b/drivers/nvme/host/Kconfig
index 31974c7dd20c..6e119cf475de 100644
--- a/drivers/nvme/host/Kconfig
+++ b/drivers/nvme/host/Kconfig
@@ -82,7 +82,7 @@ config NVME_FC
config NVME_TCP
tristate "NVM Express over Fabrics TCP host driver"
- depends on INET
+ depends on INET && IPV4
depends on BLOCK
select CRC32
select NET_CRC32C
diff --git a/drivers/nvme/target/Kconfig b/drivers/nvme/target/Kconfig
index 69bde270115e..f731a043f6a9 100644
--- a/drivers/nvme/target/Kconfig
+++ b/drivers/nvme/target/Kconfig
@@ -86,7 +86,7 @@ config NVME_TARGET_FCLOOP
config NVME_TARGET_TCP
tristate "NVMe over Fabrics TCP target support"
- depends on INET
+ depends on INET && IPV4
depends on NVME_TARGET
help
This enables the NVMe TCP target support, which allows exporting NVMe
diff --git a/drivers/scsi/bnx2fc/Kconfig b/drivers/scsi/bnx2fc/Kconfig
index d12eeb13384a..d5065b8fdea9 100644
--- a/drivers/scsi/bnx2fc/Kconfig
+++ b/drivers/scsi/bnx2fc/Kconfig
@@ -1,6 +1,7 @@
# SPDX-License-Identifier: GPL-2.0-only
config SCSI_BNX2X_FCOE
tristate "QLogic FCoE offload support"
+ depends on IPV4
depends on PCI
depends on LIBFC
depends on LIBFCOE
diff --git a/drivers/scsi/bnx2i/Kconfig b/drivers/scsi/bnx2i/Kconfig
index e649a04fab1d..0458e4811731 100644
--- a/drivers/scsi/bnx2i/Kconfig
+++ b/drivers/scsi/bnx2i/Kconfig
@@ -2,6 +2,7 @@
config SCSI_BNX2_ISCSI
tristate "QLogic NetXtreme II iSCSI support"
depends on NET
+ depends on IPV4
depends on PCI
select SCSI_ISCSI_ATTRS
select NETDEVICES
diff --git a/drivers/scsi/cxgbi/cxgb3i/Kconfig b/drivers/scsi/cxgbi/cxgb3i/Kconfig
index 143e881ec77e..abb4a462cb37 100644
--- a/drivers/scsi/cxgbi/cxgb3i/Kconfig
+++ b/drivers/scsi/cxgbi/cxgb3i/Kconfig
@@ -1,7 +1,7 @@
# SPDX-License-Identifier: GPL-2.0-only
config SCSI_CXGB3_ISCSI
tristate "Chelsio T3 iSCSI support"
- depends on PCI && INET
+ depends on PCI && INET && IPV4
select NETDEVICES
select ETHERNET
select NET_VENDOR_CHELSIO
diff --git a/drivers/scsi/cxgbi/cxgb4i/Kconfig b/drivers/scsi/cxgbi/cxgb4i/Kconfig
index dd1c8ff36b00..04b3e7b053dc 100644
--- a/drivers/scsi/cxgbi/cxgb4i/Kconfig
+++ b/drivers/scsi/cxgbi/cxgb4i/Kconfig
@@ -1,7 +1,7 @@
# SPDX-License-Identifier: GPL-2.0-only
config SCSI_CXGB4_ISCSI
tristate "Chelsio T4 iSCSI support"
- depends on PCI && INET
+ depends on PCI && INET && IPV4
depends on PTP_1588_CLOCK_OPTIONAL
depends on THERMAL || !THERMAL
depends on ETHERNET
diff --git a/drivers/target/iscsi/Kconfig b/drivers/target/iscsi/Kconfig
index 70d76f3dd693..362edff80c15 100644
--- a/drivers/target/iscsi/Kconfig
+++ b/drivers/target/iscsi/Kconfig
@@ -1,7 +1,7 @@
# SPDX-License-Identifier: GPL-2.0-only
config ISCSI_TARGET
tristate "SCSI Target Mode Stack"
- depends on INET
+ depends on INET && IPV4
select CRC32
select CRYPTO
select CRYPTO_HASH
diff --git a/fs/Kconfig b/fs/Kconfig
index cf6ae64776e6..20199c1cc93a 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -360,6 +360,7 @@ config GRACE_PERIOD
config LOCKD
tristate
+ depends on IPV4
depends on FILE_LOCKING
select CRC32
select GRACE_PERIOD
diff --git a/fs/afs/Kconfig b/fs/afs/Kconfig
index 682bd8ec2c10..e7ed46426f81 100644
--- a/fs/afs/Kconfig
+++ b/fs/afs/Kconfig
@@ -1,7 +1,7 @@
# SPDX-License-Identifier: GPL-2.0-only
config AFS_FS
tristate "Andrew File System support (AFS)"
- depends on INET
+ depends on INET && IPV4
select AF_RXRPC
select DNS_RESOLVER
select NETFS_SUPPORT
diff --git a/fs/nfs/Kconfig b/fs/nfs/Kconfig
index 6bb30543eff0..52efd3664d21 100644
--- a/fs/nfs/Kconfig
+++ b/fs/nfs/Kconfig
@@ -1,7 +1,7 @@
# SPDX-License-Identifier: GPL-2.0-only
config NFS_FS
tristate "NFS client support"
- depends on INET && FILE_LOCKING && MULTIUSER
+ depends on INET && FILE_LOCKING && MULTIUSER && IPV4
select CRC32
select LOCKD
select SUNRPC
diff --git a/fs/nfsd/Kconfig b/fs/nfsd/Kconfig
index ffb76761d6a8..153a9918214d 100644
--- a/fs/nfsd/Kconfig
+++ b/fs/nfsd/Kconfig
@@ -1,7 +1,7 @@
# SPDX-License-Identifier: GPL-2.0-only
config NFSD
tristate "NFS server support"
- depends on INET
+ depends on INET && IPV4
depends on FILE_LOCKING
depends on FSNOTIFY
select CRC32
diff --git a/net/Kconfig b/net/Kconfig
index e38477393551..27de9e69b5f7 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -385,7 +385,7 @@ menu "Network testing"
config NET_PKTGEN
tristate "Packet Generator (USE WITH CAUTION)"
- depends on INET && PROC_FS
+ depends on INET && IPV4 && PROC_FS
help
This module will inject preconfigured packets, at a configurable
rate, out of a given interface. It is used for network interface
@@ -452,7 +452,7 @@ config LWTUNNEL
config LWTUNNEL_BPF
bool "Execute BPF program as route nexthop action"
- depends on LWTUNNEL && INET
+ depends on LWTUNNEL && INET && IPV4
default y if LWTUNNEL=y
help
Allows to run BPF programs as a nexthop action following a route
@@ -474,7 +474,7 @@ config NET_IEEE8021Q_HELPERS
config NET_SELFTESTS
def_tristate PHYLIB
- depends on PHYLIB && INET
+ depends on PHYLIB && INET && IPV4
config NET_SOCK_MSG
bool
diff --git a/net/batman-adv/Kconfig b/net/batman-adv/Kconfig
index 58c408b7a7d9..60ad4b09be6e 100644
--- a/net/batman-adv/Kconfig
+++ b/net/batman-adv/Kconfig
@@ -9,6 +9,7 @@
config BATMAN_ADV
tristate "B.A.T.M.A.N. Advanced Meshing Protocol"
+ depends on IPV4
select CRC32
help
B.A.T.M.A.N. (better approach to mobile ad-hoc networking) is
diff --git a/net/bridge/Kconfig b/net/bridge/Kconfig
index 318715c8fc9b..421892a03129 100644
--- a/net/bridge/Kconfig
+++ b/net/bridge/Kconfig
@@ -7,6 +7,7 @@ config BRIDGE
tristate "802.1d Ethernet Bridging"
select LLC
select STP
+ depends on IPV4
help
If you say Y here, then your Linux box will be able to act as an
Ethernet bridge, which means that the different Ethernet segments it
@@ -36,7 +37,7 @@ config BRIDGE
config BRIDGE_IGMP_SNOOPING
bool "IGMP/MLD snooping"
depends on BRIDGE
- depends on INET
+ depends on INET && IPV4
default y
help
If you say Y here, then the Ethernet bridge will be able selectively
diff --git a/net/bridge/netfilter/Kconfig b/net/bridge/netfilter/Kconfig
index 4fd5a6ea26b4..003f055f8cfe 100644
--- a/net/bridge/netfilter/Kconfig
+++ b/net/bridge/netfilter/Kconfig
@@ -4,7 +4,7 @@
#
#
menuconfig NF_TABLES_BRIDGE
- depends on BRIDGE && NETFILTER && NF_TABLES
+ depends on BRIDGE && NETFILTER && NF_TABLES && IPV4
select NETFILTER_FAMILY_BRIDGE
tristate "Ethernet Bridge nf_tables support"
@@ -43,7 +43,7 @@ config NF_CONNTRACK_BRIDGE
config BRIDGE_NF_EBTABLES_LEGACY
tristate "Legacy EBTABLES support"
depends on BRIDGE && NETFILTER_XTABLES_LEGACY
- depends on NETFILTER_XTABLES
+ depends on NETFILTER_XTABLES && IPV4
default n
help
Legacy ebtables packet/frame classifier.
@@ -52,7 +52,7 @@ config BRIDGE_NF_EBTABLES_LEGACY
menuconfig BRIDGE_NF_EBTABLES
tristate "Ethernet Bridge tables (ebtables) support"
- depends on BRIDGE && NETFILTER && NETFILTER_XTABLES
+ depends on BRIDGE && NETFILTER && NETFILTER_XTABLES && IPV4
select NETFILTER_FAMILY_BRIDGE
help
ebtables is a general, extensible frame/packet identification
diff --git a/net/ipv4/Kconfig b/net/ipv4/Kconfig
index 301b47660305..51bf05d9770c 100644
--- a/net/ipv4/Kconfig
+++ b/net/ipv4/Kconfig
@@ -2,6 +2,9 @@
#
# IP configuration
#
+config IPV4
+ def_bool y
+
config IP_MULTICAST
bool "IP: multicasting"
help
@@ -62,7 +65,7 @@ config IP_FIB_TRIE_STATS
config IP_MULTIPLE_TABLES
bool "IP: policy routing"
- depends on IP_ADVANCED_ROUTER
+ depends on IPV4 && IP_ADVANCED_ROUTER
select FIB_RULES
help
Normally, a router decides what to do with a received packet based
@@ -105,6 +108,7 @@ config IP_ROUTE_CLASSID
config IP_PNP
bool "IP: kernel level autoconfiguration"
+ depends on IPV4
help
This enables automatic configuration of IP addresses of devices and
of the routing table during kernel boot, based on either information
@@ -161,6 +165,7 @@ config IP_PNP_RARP
config NET_IPIP
tristate "IP: tunneling"
+ depends on IPV4
select INET_TUNNEL
select NET_IP_TUNNEL
help
@@ -185,12 +190,14 @@ config NET_IPGRE_DEMUX
config NET_IP_TUNNEL
tristate
+ depends on IPV4
select DST_CACHE
select GRO_CELLS
default n
config NET_IPGRE
tristate "IP: GRE tunnels over IP"
+ depends on IPV4
depends on NET_IPGRE_DEMUX
select NET_IP_TUNNEL
help
@@ -219,7 +226,7 @@ config IP_MROUTE_COMMON
config IP_MROUTE
bool "IP: multicast routing"
- depends on IP_MULTICAST
+ depends on IP_MULTICAST && IPV4
select IP_MROUTE_COMMON
help
This is used if you want your machine to act as a router for IP
@@ -267,6 +274,7 @@ config IP_PIMSM_V2
config SYN_COOKIES
bool "IP: TCP syncookie support"
+ depends on IPV4
help
Normal TCP/IP networking is open to an attack known as "SYN
flooding". This denial-of-service attack prevents legitimate remote
@@ -303,6 +311,7 @@ config SYN_COOKIES
config NET_IPVTI
tristate "Virtual (secure) IP: tunneling"
+ depends on IPV4
select INET_TUNNEL
select NET_IP_TUNNEL
select XFRM
@@ -315,11 +324,13 @@ config NET_IPVTI
config NET_UDP_TUNNEL
tristate
+ depends on IPV4
select NET_IP_TUNNEL
default n
config NET_FOU
tristate "IP: Foo (IP protocols) over UDP"
+ depends on IPV4
select NET_UDP_TUNNEL
help
Foo over UDP allows any IP protocol to be directly encapsulated
@@ -338,6 +349,7 @@ config NET_FOU_IP_TUNNELS
config INET_AH
tristate "IP: AH transformation"
+ depends on IPV4
select XFRM_AH
help
Support for IPsec AH (Authentication Header).
@@ -353,6 +365,7 @@ config INET_AH
config INET_ESP
tristate "IP: ESP transformation"
+ depends on IPV4
select XFRM_ESP
help
Support for IPsec ESP (Encapsulating Security Payload).
@@ -393,6 +406,7 @@ config INET_ESPINTCP
config INET_IPCOMP
tristate "IP: IPComp transformation"
+ depends on IPV4
select INET_XFRM_TUNNEL
select XFRM_IPCOMP
help
@@ -747,7 +761,7 @@ config TCP_AO
select CRYPTO_LIB_SHA1
select CRYPTO_LIB_SHA256
select CRYPTO_LIB_UTILS
- depends on 64BIT # seq-number extension needs WRITE_ONCE(u64)
+ depends on IPV4 && 64BIT # seq-number extension needs WRITE_ONCE(u64)
help
TCP-AO specifies the use of stronger Message Authentication Codes (MACs),
protects against replays for long-lived TCP connections, and
@@ -758,6 +772,7 @@ config TCP_AO
config TCP_MD5SIG
bool "TCP: MD5 Signature Option support (RFC2385)"
+ depends on IPV4
select CRYPTO_LIB_MD5
select CRYPTO_LIB_UTILS
help
diff --git a/net/ipv4/Makefile b/net/ipv4/Makefile
index 06e21c26b76f..8b148be79fa4 100644
--- a/net/ipv4/Makefile
+++ b/net/ipv4/Makefile
@@ -3,18 +3,17 @@
# Makefile for the Linux TCP/IP (INET) layer.
#
-obj-y := route.o inetpeer.o protocol.o \
- ip_input.o ip_fragment.o ip_forward.o ip_options.o \
- ip_output.o ip_sockglue.o inet_hashtables.o \
- inet_timewait_sock.o inet_connection_sock.o \
- tcp.o tcp_input.o tcp_output.o tcp_timer.o tcp_ipv4.o \
+obj-y := inetpeer.o protocol.o inet_hashtables.o inet_timewait_sock.o \
+ inet_connection_sock.o tcp.o tcp_input.o tcp_output.o tcp_timer.o \
tcp_minisocks.o tcp_cong.o tcp_metrics.o tcp_fastopen.o \
- tcp_recovery.o tcp_ulp.o \
- tcp_offload.o tcp_plb.o datagram.o raw.o udp.o \
- udp_offload.o arp.o icmp.o devinet.o af_inet.o igmp.o \
- fib_frontend.o fib_semantics.o fib_trie.o fib_notifier.o \
- inet_fragment.o ping.o ip_tunnel_core.o gre_offload.o \
- metrics.o netlink.o nexthop.o udp_tunnel_stub.o
+ tcp_recovery.o tcp_ulp.o tcp_offload.o tcp_plb.o raw.o udp.o \
+ udp_offload.o af_inet.o inet_fragment.o ping.o ip_tunnel_core.o \
+ gre_offload.o metrics.o netlink.o nexthop.o udp_tunnel_stub.o
+
+obj-$(CONFIG_IPV4) += route.o ip_input.o ip_fragment.o ip_forward.o ip_options.o \
+ ip_sockglue.o tcp_ipv4.o datagram.o icmp.o arp.o devinet.o \
+ igmp.o fib_notifier.o ip_output.o fib_frontend.o \
+ fib_semantics.o fib_trie.o
obj-$(CONFIG_NET_IP_TUNNEL) += ip_tunnel.o
obj-$(CONFIG_SYSCTL) += sysctl_net_ipv4.o
diff --git a/net/ipv4/netfilter/Kconfig b/net/ipv4/netfilter/Kconfig
index 7dc9772fe2d8..ab4fa6a6d453 100644
--- a/net/ipv4/netfilter/Kconfig
+++ b/net/ipv4/netfilter/Kconfig
@@ -4,7 +4,7 @@
#
menu "IP: Netfilter Configuration"
- depends on INET && NETFILTER
+ depends on INET && NETFILTER && IPV4
config NF_DEFRAG_IPV4
tristate
diff --git a/net/ipv6/Kconfig b/net/ipv6/Kconfig
index c3806c6ac96f..f83efc1505cc 100644
--- a/net/ipv6/Kconfig
+++ b/net/ipv6/Kconfig
@@ -47,6 +47,7 @@ config IPV6_OPTIMISTIC_DAD
config INET6_AH
tristate "IPv6: AH transformation"
select XFRM_AH
+ depends on IPV4
help
Support for IPsec AH (Authentication Header).
@@ -61,6 +62,7 @@ config INET6_AH
config INET6_ESP
tristate "IPv6: ESP transformation"
+ depends on IPV4
select XFRM_ESP
help
Support for IPsec ESP (Encapsulating Security Payload).
@@ -101,6 +103,7 @@ config INET6_ESPINTCP
config INET6_IPCOMP
tristate "IPv6: IPComp transformation"
+ depends on IPV4
select INET6_XFRM_TUNNEL
select XFRM_IPCOMP
help
@@ -111,6 +114,7 @@ config INET6_IPCOMP
config IPV6_MIP6
tristate "IPv6: Mobility"
+ depends on IPV4
select XFRM
help
Support for IPv6 Mobility described in RFC 3775.
@@ -119,6 +123,7 @@ config IPV6_MIP6
config IPV6_ILA
tristate "IPv6: Identifier Locator Addressing (ILA)"
+ depends on IPV4
depends on NETFILTER
select DST_CACHE
select LWTUNNEL
@@ -149,6 +154,7 @@ config INET6_TUNNEL
config IPV6_VTI
tristate "Virtual (secure) IPv6: tunneling"
+ depends on IPV4
select IPV6_TUNNEL
select NET_IP_TUNNEL
select XFRM
@@ -161,6 +167,7 @@ config IPV6_VTI
config IPV6_SIT
tristate "IPv6: IPv6-in-IPv4 tunnel (SIT driver)"
+ depends on IPV4
select INET_TUNNEL
select NET_IP_TUNNEL
select IPV6_NDISC_NODETYPE
@@ -198,6 +205,7 @@ config IPV6_NDISC_NODETYPE
config IPV6_TUNNEL
tristate "IPv6: IP-in-IPv6 tunnel (RFC2473)"
+ depends on IPV4
select INET6_TUNNEL
select DST_CACHE
select GRO_CELLS
@@ -209,6 +217,7 @@ config IPV6_TUNNEL
config IPV6_GRE
tristate "IPv6: GRE tunnel"
+ depends on IPV4
select IPV6_TUNNEL
select NET_IP_TUNNEL
depends on NET_IPGRE_DEMUX
@@ -256,7 +265,7 @@ config IPV6_SUBTREES
config IPV6_MROUTE
bool "IPv6: multicast routing"
- depends on IPV6
+ depends on IPV4 && IPV6
select IP_MROUTE_COMMON
help
Support for IPv6 multicast forwarding.
@@ -285,7 +294,7 @@ config IPV6_PIMSM_V2
config IPV6_SEG6_LWTUNNEL
bool "IPv6: Segment Routing Header encapsulation support"
- depends on IPV6
+ depends on IPV4 && IPV6
select LWTUNNEL
select DST_CACHE
select IPV6_MULTIPLE_TABLES
@@ -316,7 +325,7 @@ config IPV6_SEG6_BPF
config IPV6_RPL_LWTUNNEL
bool "IPv6: RPL Source Routing Header support"
- depends on IPV6
+ depends on IPV4 && IPV6
select LWTUNNEL
select DST_CACHE
help
@@ -327,7 +336,7 @@ config IPV6_RPL_LWTUNNEL
config IPV6_IOAM6_LWTUNNEL
bool "IPv6: IOAM Pre-allocated Trace insertion support"
- depends on IPV6
+ depends on IPV4 && IPV6
select LWTUNNEL
select DST_CACHE
help
diff --git a/net/ipv6/netfilter/Kconfig b/net/ipv6/netfilter/Kconfig
index 81daf82ddc2d..f99a2176bf3d 100644
--- a/net/ipv6/netfilter/Kconfig
+++ b/net/ipv6/netfilter/Kconfig
@@ -4,7 +4,7 @@
#
menu "IPv6: Netfilter Configuration"
- depends on INET && IPV6 && NETFILTER
+ depends on INET && IPV6 && NETFILTER && IPV4
# old sockopt interface and eval loop
config IP6_NF_IPTABLES_LEGACY
diff --git a/net/l2tp/Kconfig b/net/l2tp/Kconfig
index 0de178d5baba..e92cf6d94135 100644
--- a/net/l2tp/Kconfig
+++ b/net/l2tp/Kconfig
@@ -5,7 +5,7 @@
menuconfig L2TP
tristate "Layer Two Tunneling Protocol (L2TP)"
- depends on INET
+ depends on INET && IPV4
select NET_UDP_TUNNEL
help
Layer Two Tunneling Protocol
diff --git a/net/mac80211/Kconfig b/net/mac80211/Kconfig
index d6bc295e23a1..ec485da28373 100644
--- a/net/mac80211/Kconfig
+++ b/net/mac80211/Kconfig
@@ -1,7 +1,7 @@
# SPDX-License-Identifier: GPL-2.0-only
config MAC80211
tristate "Generic IEEE 802.11 Networking Stack (mac80211)"
- depends on CFG80211
+ depends on CFG80211 && IPV4
select CRYPTO
select CRYPTO_LIB_AES_CBC_MACS
select CRYPTO_LIB_ARC4
diff --git a/net/mpls/Kconfig b/net/mpls/Kconfig
index d672ab72ab12..541ba192e2a1 100644
--- a/net/mpls/Kconfig
+++ b/net/mpls/Kconfig
@@ -25,6 +25,7 @@ config NET_MPLS_GSO
config MPLS_ROUTING
tristate "MPLS: routing support"
+ depends on IPV4
depends on NET_IP_TUNNEL || NET_IP_TUNNEL=n
depends on PROC_SYSCTL
help
diff --git a/net/mptcp/Kconfig b/net/mptcp/Kconfig
index be71fc9b4638..c5b660fdda4c 100644
--- a/net/mptcp/Kconfig
+++ b/net/mptcp/Kconfig
@@ -1,7 +1,7 @@
config MPTCP
bool "MPTCP: Multipath TCP"
- depends on INET
+ depends on INET && IPV4
select SKB_EXTENSIONS
select CRYPTO_LIB_SHA256
select CRYPTO_LIB_UTILS
diff --git a/net/netfilter/Kconfig b/net/netfilter/Kconfig
index 4c04cd8d40a2..3ee9bb726e40 100644
--- a/net/netfilter/Kconfig
+++ b/net/netfilter/Kconfig
@@ -1,6 +1,6 @@
# SPDX-License-Identifier: GPL-2.0-only
menu "Core Netfilter Configuration"
- depends on INET && NETFILTER
+ depends on INET && IPV4 && NETFILTER
config NETFILTER_INGRESS
bool "Netfilter ingress support"
diff --git a/net/netfilter/ipset/Kconfig b/net/netfilter/ipset/Kconfig
index 6c4d54758106..e6537c842a45 100644
--- a/net/netfilter/ipset/Kconfig
+++ b/net/netfilter/ipset/Kconfig
@@ -1,7 +1,7 @@
# SPDX-License-Identifier: GPL-2.0-only
menuconfig IP_SET
tristate "IP set support"
- depends on INET && NETFILTER
+ depends on INET && IPV4 && NETFILTER
select NETFILTER_NETLINK
help
This option adds IP set support to the kernel.
diff --git a/net/netfilter/ipvs/Kconfig b/net/netfilter/ipvs/Kconfig
index 7724cb44e6de..fb09218d84d0 100644
--- a/net/netfilter/ipvs/Kconfig
+++ b/net/netfilter/ipvs/Kconfig
@@ -4,7 +4,7 @@
#
menuconfig IP_VS
tristate "IP virtual server support"
- depends on INET && NETFILTER
+ depends on INET && NETFILTER && IPV4
depends on (NF_CONNTRACK || NF_CONNTRACK=n)
help
IP Virtual Server support will let you build a high-performance
diff --git a/net/openvswitch/Kconfig b/net/openvswitch/Kconfig
index e6aaee92dba4..5931c28ef965 100644
--- a/net/openvswitch/Kconfig
+++ b/net/openvswitch/Kconfig
@@ -5,7 +5,7 @@
config OPENVSWITCH
tristate "Open vSwitch"
- depends on INET
+ depends on INET && IPV4
depends on !NF_CONNTRACK || \
(NF_CONNTRACK && ((!NF_DEFRAG_IPV6 || NF_DEFRAG_IPV6) && \
(!NF_NAT || NF_NAT) && \
diff --git a/net/packet/Kconfig b/net/packet/Kconfig
index 2997382d597c..00fda9e08cb0 100644
--- a/net/packet/Kconfig
+++ b/net/packet/Kconfig
@@ -5,6 +5,7 @@
config PACKET
tristate "Packet socket"
+ depends on IPV4
help
The Packet protocol is used by applications which communicate
directly with network devices without an intermediate network
diff --git a/net/rds/Kconfig b/net/rds/Kconfig
index f007730aa2bb..d33cf3d89632 100644
--- a/net/rds/Kconfig
+++ b/net/rds/Kconfig
@@ -2,7 +2,7 @@
config RDS
tristate "The Reliable Datagram Sockets Protocol"
- depends on INET
+ depends on INET && IPV4
help
The RDS (Reliable Datagram Sockets) protocol provides reliable,
sequenced delivery of datagrams over Infiniband or TCP.
diff --git a/net/rxrpc/Kconfig b/net/rxrpc/Kconfig
index 2cebb666dc07..2029d2d1065f 100644
--- a/net/rxrpc/Kconfig
+++ b/net/rxrpc/Kconfig
@@ -5,7 +5,7 @@
config AF_RXRPC
tristate "RxRPC session sockets"
- depends on INET
+ depends on INET && IPV4
select CRYPTO
select CRYPTO_LIB_DES if RXKAD
select KEYS
diff --git a/net/sched/Kconfig b/net/sched/Kconfig
index 6ddff028b81a..bb782822c3fb 100644
--- a/net/sched/Kconfig
+++ b/net/sched/Kconfig
@@ -807,7 +807,7 @@ config NET_ACT_SKBEDIT
config NET_ACT_CSUM
tristate "Checksum Updating"
- depends on NET_CLS_ACT && INET
+ depends on NET_CLS_ACT && INET && IPV4
select NET_CRC32C
help
Say Y here to update some common checksum after some direct
diff --git a/net/sctp/Kconfig b/net/sctp/Kconfig
index fc989a3791b3..eb3e2bf1ec3a 100644
--- a/net/sctp/Kconfig
+++ b/net/sctp/Kconfig
@@ -5,7 +5,7 @@
menuconfig IP_SCTP
tristate "The SCTP Protocol"
- depends on INET
+ depends on INET && IPV4
select CRYPTO_LIB_SHA1
select CRYPTO_LIB_SHA256
select CRYPTO_LIB_UTILS
diff --git a/net/smc/Kconfig b/net/smc/Kconfig
index 277ef504bc26..52005e4bf77d 100644
--- a/net/smc/Kconfig
+++ b/net/smc/Kconfig
@@ -1,7 +1,7 @@
# SPDX-License-Identifier: GPL-2.0-only
config SMC
tristate "SMC socket protocol family"
- depends on INET && INFINIBAND && DIBS
+ depends on INET && INFINIBAND && DIBS && IPV4
help
SMC-R provides a "sockets over RDMA" solution making use of
RDMA over Converged Ethernet (RoCE) technology to upgrade
diff --git a/net/sunrpc/Kconfig b/net/sunrpc/Kconfig
index e7808e5714dc..58e6f6db3100 100644
--- a/net/sunrpc/Kconfig
+++ b/net/sunrpc/Kconfig
@@ -1,7 +1,7 @@
# SPDX-License-Identifier: GPL-2.0-only
config SUNRPC
tristate
- depends on MULTIUSER
+ depends on MULTIUSER && IPV4
config SUNRPC_GSS
tristate
diff --git a/net/tipc/Kconfig b/net/tipc/Kconfig
index 18f62135e47b..869e3fe961f9 100644
--- a/net/tipc/Kconfig
+++ b/net/tipc/Kconfig
@@ -5,7 +5,7 @@
menuconfig TIPC
tristate "The TIPC Protocol"
- depends on INET
+ depends on INET && IPV4
help
The Transparent Inter Process Communication (TIPC) protocol is
specially designed for intra cluster communication. This protocol
diff --git a/net/xfrm/Kconfig b/net/xfrm/Kconfig
index 4a62817a88f8..2e4d466c7bd3 100644
--- a/net/xfrm/Kconfig
+++ b/net/xfrm/Kconfig
@@ -4,7 +4,7 @@
#
config XFRM
bool
- depends on INET
+ depends on INET && IPV4
select GRO_CELLS
select SKB_EXTENSIONS
@@ -13,6 +13,7 @@ config XFRM_OFFLOAD
config XFRM_ALGO
tristate
+ depends on IPV4
select XFRM
select CRYPTO
select CRYPTO_AEAD
@@ -23,6 +24,7 @@ if INET
config XFRM_USER
tristate "Transformation user configuration interface"
select XFRM_ALGO
+ depends on IPV4
help
Support for Transformation(XFRM) user configuration interface
like IPsec used by native Linux tools.
@@ -42,7 +44,7 @@ config XFRM_USER_COMPAT
config XFRM_INTERFACE
tristate "Transformation virtual interface"
- depends on XFRM && IPV6
+ depends on XFRM && IPV4 && IPV6
help
This provides a virtual interface to route IPsec traffic.
@@ -83,6 +85,7 @@ config XFRM_STATISTICS
# RFC 8221 lists as MUST be implemented.
config XFRM_AH
tristate
+ depends on IPV4
select XFRM_ALGO
select CRYPTO
select CRYPTO_HMAC
@@ -92,6 +95,7 @@ config XFRM_AH
# algorithms that RFC 8221 lists as MUST be implemented.
config XFRM_ESP
tristate
+ depends on IPV4
select XFRM_ALGO
select CRYPTO
select CRYPTO_AES
@@ -105,12 +109,14 @@ config XFRM_ESP
config XFRM_IPCOMP
tristate
+ depends on IPV4
select XFRM_ALGO
select CRYPTO
select CRYPTO_DEFLATE
config NET_KEY
tristate "PF_KEY sockets (deprecated)"
+ depends on IPV4
select XFRM_ALGO
help
PF_KEYv2 socket family, compatible to KAME ones.
@@ -140,6 +146,7 @@ config NET_KEY_MIGRATE
config XFRM_IPTFS
tristate "IPsec IP-TFS/AGGFRAG (RFC 9347) encapsulation support"
+ depends on IPV4
depends on XFRM
help
Information on the IP-TFS/AGGFRAG encapsulation can be found
@@ -156,5 +163,6 @@ config XFRM_IPTFS
config XFRM_ESPINTCP
bool
+ depends on IPV4
endif # INET
--
2.54.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH 01/13 RFC net-next] net: ipv4: introduce CONFIG_IPV4 to decouple the IPv4 stack
2026-07-12 1:38 ` [PATCH 01/13 RFC net-next] net: ipv4: introduce CONFIG_IPV4 to decouple the IPv4 stack Fernando Fernandez Mancera
@ 2026-07-12 11:01 ` Arnd Bergmann
0 siblings, 0 replies; 2+ messages in thread
From: Arnd Bergmann @ 2026-07-12 11:01 UTC (permalink / raw)
To: Fernando Fernandez Mancera, Netdev
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On Sun, Jul 12, 2026, at 03:38, Fernando Fernandez Mancera wrote:
> Historically, the IPv4 protocol has been linked to the core INET
> subsystem. Because shared infrastructure like the TCP/UDP engine,
> routing or INET hashtables live inside net/ipv4/, it has been impossible
> to compile a kernel with only IPv6 support.
>
> This patch introduces the CONFIG_IPV4 Kconfig symbol, which is set to
> 'def_bool y' for now. This does not allow to completely disable the
> IPv4 stack yet but it lays the necessary build-system work for that
> goal.
I expect this will cause additional (trivial) build regression in the
next step when randconfig builds run into obscure corner cases, either
with INET=y IPV4=n IPV6=y or with INET=y IPV4=n IPV6=n.
I can probably give your patch (with IPV4 visible or disabled) an
early go on the randconfig tree to find these more quickly.
If I run into regressions, should I just add more 'depends on IPV4',
or do you have other plans?
Should we have some logic to ensure that at least one of IPV4 or
IPV6 is enabled? I think this would work
config IPV4
bool "The IPv4 protocol" if IPV6
default INET
which only allows turning IPV4 off if IPV6 has enabled.
Arnd
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2026-07-12 1:38 ` [PATCH 01/13 RFC net-next] net: ipv4: introduce CONFIG_IPV4 to decouple the IPv4 stack Fernando Fernandez Mancera
2026-07-12 11:01 ` Arnd Bergmann
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