Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

10 files changed, 540 insertions, 0 deletions

diff --git a/scripts/selinux/Makefile b/scripts/selinux/Makefile
new file mode 100644
index 000000000..59494e149
--- /dev/null
+++ b/scripts/selinux/Makefile
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
+subdir-y := mdp genheaders
diff --git a/scripts/selinux/README b/scripts/selinux/README
new file mode 100644
index 000000000..5ba679c5b
--- /dev/null
+++ b/scripts/selinux/README
@@ -0,0 +1,2 @@
+Please see Documentation/admin-guide/LSM/SELinux.rst for information on
+installing a dummy SELinux policy.
diff --git a/scripts/selinux/genheaders/.gitignore b/scripts/selinux/genheaders/.gitignore
new file mode 100644
index 000000000..5fcadd307
--- /dev/null
+++ b/scripts/selinux/genheaders/.gitignore
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
+genheaders
diff --git a/scripts/selinux/genheaders/Makefile b/scripts/selinux/genheaders/Makefile
new file mode 100644
index 000000000..1faf7f07e
--- /dev/null
+++ b/scripts/selinux/genheaders/Makefile
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0
+hostprogs-always-y += genheaders
+HOST_EXTRACFLAGS += \
+	-I$(srctree)/include/uapi -I$(srctree)/include \
+	-I$(srctree)/security/selinux/include
diff --git a/scripts/selinux/genheaders/genheaders.c b/scripts/selinux/genheaders/genheaders.c
new file mode 100644
index 000000000..155208068
--- /dev/null
+++ b/scripts/selinux/genheaders/genheaders.c
@@ -0,0 +1,157 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/* NOTE: we really do want to use the kernel headers here */
+#define __EXPORTED_HEADERS__
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <ctype.h>
+
+struct security_class_mapping {
+	const char *name;
+	const char *perms[sizeof(unsigned) * 8 + 1];
+};
+
+#include "classmap.h"
+#include "initial_sid_to_string.h"
+
+const char *progname;
+
+static void usage(void)
+{
+	printf("usage: %s flask.h av_permissions.h\n", progname);
+	exit(1);
+}
+
+static char *stoupperx(const char *s)
+{
+	char *s2 = strdup(s);
+	char *p;
+
+	if (!s2) {
+		fprintf(stderr, "%s:  out of memory\n", progname);
+		exit(3);
+	}
+
+	for (p = s2; *p; p++)
+		*p = toupper(*p);
+	return s2;
+}
+
+int main(int argc, char *argv[])
+{
+	int i, j;
+	int isids_len;
+	FILE *fout;
+
+	progname = argv[0];
+
+	if (argc < 3)
+		usage();
+
+	fout = fopen(argv[1], "w");
+	if (!fout) {
+		fprintf(stderr, "Could not open %s for writing:  %s\n",
+			argv[1], strerror(errno));
+		exit(2);
+	}
+
+	fprintf(fout, "/* This file is automatically generated.  Do not edit. */\n");
+	fprintf(fout, "#ifndef _SELINUX_FLASK_H_\n#define _SELINUX_FLASK_H_\n\n");
+
+	for (i = 0; secclass_map[i].name; i++) {
+		char *name = stoupperx(secclass_map[i].name);
+
+		fprintf(fout, "#define SECCLASS_%-39s %2d\n", name, i+1);
+		free(name);
+	}
+
+	fprintf(fout, "\n");
+
+	isids_len = sizeof(initial_sid_to_string) / sizeof(char *);
+	for (i = 1; i < isids_len; i++) {
+		const char *s = initial_sid_to_string[i];
+		if (s) {
+			char *sidname = stoupperx(s);
+
+			fprintf(fout, "#define SECINITSID_%-39s %2d\n", sidname, i);
+			free(sidname);
+		}
+	}
+	fprintf(fout, "\n#define SECINITSID_NUM %d\n", i-1);
+	fprintf(fout, "\nstatic inline bool security_is_socket_class(u16 kern_tclass)\n");
+	fprintf(fout, "{\n");
+	fprintf(fout, "\tbool sock = false;\n\n");
+	fprintf(fout, "\tswitch (kern_tclass) {\n");
+	for (i = 0; secclass_map[i].name; i++) {
+		static char s[] = "SOCKET";
+		int len, l;
+		char *name = stoupperx(secclass_map[i].name);
+
+		len = strlen(name);
+		l = sizeof(s) - 1;
+		if (len >= l && memcmp(name + len - l, s, l) == 0)
+			fprintf(fout, "\tcase SECCLASS_%s:\n", name);
+		free(name);
+	}
+	fprintf(fout, "\t\tsock = true;\n");
+	fprintf(fout, "\t\tbreak;\n");
+	fprintf(fout, "\tdefault:\n");
+	fprintf(fout, "\t\tbreak;\n");
+	fprintf(fout, "\t}\n\n");
+	fprintf(fout, "\treturn sock;\n");
+	fprintf(fout, "}\n");
+
+	fprintf(fout, "\n#endif\n");
+
+	if (fclose(fout) != 0) {
+		fprintf(stderr, "Could not successfully close %s:  %s\n",
+			argv[1], strerror(errno));
+		exit(4);
+	}
+
+	fout = fopen(argv[2], "w");
+	if (!fout) {
+		fprintf(stderr, "Could not open %s for writing:  %s\n",
+			argv[2], strerror(errno));
+		exit(5);
+	}
+
+	fprintf(fout, "/* This file is automatically generated.  Do not edit. */\n");
+	fprintf(fout, "#ifndef _SELINUX_AV_PERMISSIONS_H_\n#define _SELINUX_AV_PERMISSIONS_H_\n\n");
+
+	for (i = 0; secclass_map[i].name; i++) {
+		const struct security_class_mapping *map = &secclass_map[i];
+		int len;
+		char *name = stoupperx(map->name);
+
+		len = strlen(name);
+		for (j = 0; map->perms[j]; j++) {
+			char *permname;
+
+			if (j >= 32) {
+				fprintf(stderr, "Too many permissions to fit into an access vector at (%s, %s).\n",
+					map->name, map->perms[j]);
+				exit(5);
+			}
+			permname = stoupperx(map->perms[j]);
+			fprintf(fout, "#define %s__%-*s 0x%08xU\n", name,
+				39-len, permname, 1U<<j);
+			free(permname);
+		}
+		free(name);
+	}
+
+	fprintf(fout, "\n#endif\n");
+
+	if (fclose(fout) != 0) {
+		fprintf(stderr, "Could not successfully close %s:  %s\n",
+			argv[2], strerror(errno));
+		exit(6);
+	}
+
+	exit(0);
+}
diff --git a/scripts/selinux/install_policy.sh b/scripts/selinux/install_policy.sh
new file mode 100755
index 000000000..24086793b
--- /dev/null
+++ b/scripts/selinux/install_policy.sh
@@ -0,0 +1,84 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+set -e
+if [ `id -u` -ne 0 ]; then
+	echo "$0: must be root to install the selinux policy"
+	exit 1
+fi
+
+SF=`which setfiles`
+if [ $? -eq 1 ]; then
+	echo "Could not find setfiles"
+	echo "Do you have policycoreutils installed?"
+	exit 1
+fi
+
+CP=`which checkpolicy`
+if [ $? -eq 1 ]; then
+	echo "Could not find checkpolicy"
+	echo "Do you have checkpolicy installed?"
+	exit 1
+fi
+VERS=`$CP -V | awk '{print $1}'`
+
+ENABLED=`which selinuxenabled`
+if [ $? -eq 1 ]; then
+	echo "Could not find selinuxenabled"
+	echo "Do you have libselinux-utils installed?"
+	exit 1
+fi
+
+if selinuxenabled; then
+    echo "SELinux is already enabled"
+    echo "This prevents safely relabeling all files."
+    echo "Boot with selinux=0 on the kernel command-line."
+    exit 1
+fi
+
+cd mdp
+./mdp -m policy.conf file_contexts
+$CP -U allow -M -o policy.$VERS policy.conf
+
+mkdir -p /etc/selinux/dummy/policy
+mkdir -p /etc/selinux/dummy/contexts/files
+
+echo "__default__:user_u:s0" > /etc/selinux/dummy/seusers
+echo "base_r:base_t:s0" > /etc/selinux/dummy/contexts/failsafe_context
+echo "base_r:base_t:s0 base_r:base_t:s0" > /etc/selinux/dummy/default_contexts
+cat > /etc/selinux/dummy/contexts/x_contexts <<EOF
+client * user_u:base_r:base_t:s0
+property * user_u:object_r:base_t:s0
+extension * user_u:object_r:base_t:s0
+selection * user_u:object_r:base_t:s0
+event * user_u:object_r:base_t:s0
+EOF
+touch /etc/selinux/dummy/contexts/virtual_domain_context
+touch /etc/selinux/dummy/contexts/virtual_image_context
+
+cp file_contexts /etc/selinux/dummy/contexts/files
+cp dbus_contexts /etc/selinux/dummy/contexts
+cp policy.$VERS /etc/selinux/dummy/policy
+FC_FILE=/etc/selinux/dummy/contexts/files/file_contexts
+
+if [ ! -d /etc/selinux ]; then
+	mkdir -p /etc/selinux
+fi
+if [ -f /etc/selinux/config ]; then
+    echo "/etc/selinux/config exists, moving to /etc/selinux/config.bak."
+    mv /etc/selinux/config /etc/selinux/config.bak
+fi
+echo "Creating new /etc/selinux/config for dummy policy."
+cat > /etc/selinux/config << EOF
+SELINUX=permissive
+SELINUXTYPE=dummy
+EOF
+
+cd /etc/selinux/dummy/contexts/files
+$SF -F file_contexts /
+
+mounts=`cat /proc/$$/mounts | \
+	grep -E "ext[234]|jfs|xfs|reiserfs|jffs2|gfs2|btrfs|f2fs|ocfs2" | \
+	awk '{ print $2 '}`
+$SF -F file_contexts $mounts
+
+echo "-F" > /.autorelabel
diff --git a/scripts/selinux/mdp/.gitignore b/scripts/selinux/mdp/.gitignore
new file mode 100644
index 000000000..a7482287e
--- /dev/null
+++ b/scripts/selinux/mdp/.gitignore
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
+mdp
diff --git a/scripts/selinux/mdp/Makefile b/scripts/selinux/mdp/Makefile
new file mode 100644
index 000000000..d61058ddd
--- /dev/null
+++ b/scripts/selinux/mdp/Makefile
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0
+hostprogs-always-y += mdp
+HOST_EXTRACFLAGS += \
+	-I$(srctree)/include/uapi -I$(srctree)/include \
+	-I$(srctree)/security/selinux/include -I$(objtree)/include
+
+clean-files	:= policy.* file_contexts
diff --git a/scripts/selinux/mdp/dbus_contexts b/scripts/selinux/mdp/dbus_contexts
new file mode 100644
index 000000000..116e684f9
--- /dev/null
+++ b/scripts/selinux/mdp/dbus_contexts
@@ -0,0 +1,6 @@
+<!DOCTYPE busconfig PUBLIC "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
+ "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
+<busconfig>
+  <selinux>
+  </selinux>
+</busconfig>
diff --git a/scripts/selinux/mdp/mdp.c b/scripts/selinux/mdp/mdp.c
new file mode 100644
index 000000000..1415604c3
--- /dev/null
+++ b/scripts/selinux/mdp/mdp.c
@@ -0,0 +1,273 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *
+ * mdp - make dummy policy
+ *
+ * When pointed at a kernel tree, builds a dummy policy for that kernel
+ * with exactly one type with full rights to itself.
+ *
+ * Copyright (C) IBM Corporation, 2006
+ *
+ * Authors: Serge E. Hallyn <serue@us.ibm.com>
+ */
+
+
+/* NOTE: we really do want to use the kernel headers here */
+#define __EXPORTED_HEADERS__
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <linux/kconfig.h>
+
+static void usage(char *name)
+{
+	printf("usage: %s [-m] policy_file context_file\n", name);
+	exit(1);
+}
+
+/* Class/perm mapping support */
+struct security_class_mapping {
+	const char *name;
+	const char *perms[sizeof(unsigned) * 8 + 1];
+};
+
+#include "classmap.h"
+#include "initial_sid_to_string.h"
+#include "policycap_names.h"
+
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
+
+int main(int argc, char *argv[])
+{
+	int i, j, mls = 0;
+	int initial_sid_to_string_len;
+	char **arg, *polout, *ctxout;
+
+	FILE *fout;
+
+	if (argc < 3)
+		usage(argv[0]);
+	arg = argv+1;
+	if (argc==4 && strcmp(argv[1], "-m") == 0) {
+		mls = 1;
+		arg++;
+	}
+	polout = *arg++;
+	ctxout = *arg;
+
+	fout = fopen(polout, "w");
+	if (!fout) {
+		printf("Could not open %s for writing\n", polout);
+		usage(argv[0]);
+	}
+
+	/* print out the classes */
+	for (i = 0; secclass_map[i].name; i++)
+		fprintf(fout, "class %s\n", secclass_map[i].name);
+	fprintf(fout, "\n");
+
+	initial_sid_to_string_len = sizeof(initial_sid_to_string) / sizeof (char *);
+	/* print out the sids */
+	for (i = 1; i < initial_sid_to_string_len; i++) {
+		const char *name = initial_sid_to_string[i];
+
+		if (name)
+			fprintf(fout, "sid %s\n", name);
+		else
+			fprintf(fout, "sid unused%d\n", i);
+	}
+	fprintf(fout, "\n");
+
+	/* print out the class permissions */
+	for (i = 0; secclass_map[i].name; i++) {
+		const struct security_class_mapping *map = &secclass_map[i];
+		fprintf(fout, "class %s\n", map->name);
+		fprintf(fout, "{\n");
+		for (j = 0; map->perms[j]; j++)
+			fprintf(fout, "\t%s\n", map->perms[j]);
+		fprintf(fout, "}\n\n");
+	}
+	fprintf(fout, "\n");
+
+	/* print out mls declarations and constraints */
+	if (mls) {
+		fprintf(fout, "sensitivity s0;\n");
+		fprintf(fout, "sensitivity s1;\n");
+		fprintf(fout, "dominance { s0 s1 }\n");
+		fprintf(fout, "category c0;\n");
+		fprintf(fout, "category c1;\n");
+		fprintf(fout, "level s0:c0.c1;\n");
+		fprintf(fout, "level s1:c0.c1;\n");
+#define SYSTEMLOW "s0"
+#define SYSTEMHIGH "s1:c0.c1"
+		for (i = 0; secclass_map[i].name; i++) {
+			const struct security_class_mapping *map = &secclass_map[i];
+
+			fprintf(fout, "mlsconstrain %s {\n", map->name);
+			for (j = 0; map->perms[j]; j++)
+				fprintf(fout, "\t%s\n", map->perms[j]);
+			/*
+			 * This requires all subjects and objects to be
+			 * single-level (l2 eq h2), and that the subject
+			 * level dominate the object level (h1 dom h2)
+			 * in order to have any permissions to it.
+			 */
+			fprintf(fout, "} (l2 eq h2 and h1 dom h2);\n\n");
+		}
+	}
+
+	/* enable all policy capabilities */
+	for (i = 0; i < ARRAY_SIZE(selinux_policycap_names); i++)
+		fprintf(fout, "policycap %s;\n", selinux_policycap_names[i]);
+
+	/* types, roles, and allows */
+	fprintf(fout, "type base_t;\n");
+	fprintf(fout, "role base_r;\n");
+	fprintf(fout, "role base_r types { base_t };\n");
+	for (i = 0; secclass_map[i].name; i++)
+		fprintf(fout, "allow base_t base_t:%s *;\n",
+			secclass_map[i].name);
+	fprintf(fout, "user user_u roles { base_r }");
+	if (mls)
+		fprintf(fout, " level %s range %s - %s", SYSTEMLOW,
+			SYSTEMLOW, SYSTEMHIGH);
+	fprintf(fout, ";\n");
+
+#define SUBJUSERROLETYPE "user_u:base_r:base_t"
+#define OBJUSERROLETYPE "user_u:object_r:base_t"
+
+	/* default sids */
+	for (i = 1; i < initial_sid_to_string_len; i++) {
+		const char *name = initial_sid_to_string[i];
+
+		if (name)
+			fprintf(fout, "sid %s ", name);
+		else
+			fprintf(fout, "sid unused%d\n", i);
+		fprintf(fout, SUBJUSERROLETYPE "%s\n",
+			mls ? ":" SYSTEMLOW : "");
+	}
+	fprintf(fout, "\n");
+
+#define FS_USE(behavior, fstype)			    \
+	fprintf(fout, "fs_use_%s %s " OBJUSERROLETYPE "%s;\n", \
+		behavior, fstype, mls ? ":" SYSTEMLOW : "")
+
+	/*
+	 * Filesystems whose inode labels can be fetched via getxattr.
+	 */
+#ifdef CONFIG_EXT2_FS_SECURITY
+	FS_USE("xattr", "ext2");
+#endif
+#ifdef CONFIG_EXT4_FS_SECURITY
+#ifdef CONFIG_EXT4_USE_FOR_EXT2
+	FS_USE("xattr", "ext2");
+#endif
+	FS_USE("xattr", "ext3");
+	FS_USE("xattr", "ext4");
+#endif
+#ifdef CONFIG_JFS_SECURITY
+	FS_USE("xattr", "jfs");
+#endif
+#ifdef CONFIG_REISERFS_FS_SECURITY
+	FS_USE("xattr", "reiserfs");
+#endif
+#ifdef CONFIG_JFFS2_FS_SECURITY
+	FS_USE("xattr", "jffs2");
+#endif
+#ifdef CONFIG_XFS_FS
+	FS_USE("xattr", "xfs");
+#endif
+#ifdef CONFIG_GFS2_FS
+	FS_USE("xattr", "gfs2");
+#endif
+#ifdef CONFIG_BTRFS_FS
+	FS_USE("xattr", "btrfs");
+#endif
+#ifdef CONFIG_F2FS_FS_SECURITY
+	FS_USE("xattr", "f2fs");
+#endif
+#ifdef CONFIG_OCFS2_FS
+	FS_USE("xattr", "ocsfs2");
+#endif
+#ifdef CONFIG_OVERLAY_FS
+	FS_USE("xattr", "overlay");
+#endif
+#ifdef CONFIG_SQUASHFS_XATTR
+	FS_USE("xattr", "squashfs");
+#endif
+
+	/*
+	 * Filesystems whose inodes are labeled from allocating task.
+	 */
+	FS_USE("task", "pipefs");
+	FS_USE("task", "sockfs");
+
+	/*
+	 * Filesystems whose inode labels are computed from both
+	 * the allocating task and the superblock label.
+	 */
+#ifdef CONFIG_UNIX98_PTYS
+	FS_USE("trans", "devpts");
+#endif
+#ifdef CONFIG_HUGETLBFS
+	FS_USE("trans", "hugetlbfs");
+#endif
+#ifdef CONFIG_TMPFS
+	FS_USE("trans", "tmpfs");
+#endif
+#ifdef CONFIG_DEVTMPFS
+	FS_USE("trans", "devtmpfs");
+#endif
+#ifdef CONFIG_POSIX_MQUEUE
+	FS_USE("trans", "mqueue");
+#endif
+
+#define GENFSCON(fstype, prefix)			     \
+	fprintf(fout, "genfscon %s %s " OBJUSERROLETYPE "%s\n", \
+		fstype, prefix, mls ? ":" SYSTEMLOW : "")
+
+	/*
+	 * Filesystems whose inodes are labeled from path prefix match
+	 * relative to the filesystem root.  Depending on the filesystem,
+	 * only a single label for all inodes may be supported.  Here
+	 * we list the filesystem types for which per-file labeling is
+	 * supported using genfscon; any other filesystem type can also
+	 * be added by only with a single entry for all of its inodes.
+	 */
+#ifdef CONFIG_PROC_FS
+	GENFSCON("proc", "/");
+#endif
+#ifdef CONFIG_SECURITY_SELINUX
+	GENFSCON("selinuxfs", "/");
+#endif
+#ifdef CONFIG_SYSFS
+	GENFSCON("sysfs", "/");
+#endif
+#ifdef CONFIG_DEBUG_FS
+	GENFSCON("debugfs", "/");
+#endif
+#ifdef CONFIG_TRACING
+	GENFSCON("tracefs", "/");
+#endif
+#ifdef CONFIG_PSTORE
+	GENFSCON("pstore", "/");
+#endif
+	GENFSCON("cgroup", "/");
+	GENFSCON("cgroup2", "/");
+
+	fclose(fout);
+
+	fout = fopen(ctxout, "w");
+	if (!fout) {
+		printf("Wrote policy, but cannot open %s for writing\n", ctxout);
+		usage(argv[0]);
+	}
+	fprintf(fout, "/ " OBJUSERROLETYPE "%s\n", mls ? ":" SYSTEMLOW : "");
+	fprintf(fout, "/.* " OBJUSERROLETYPE "%s\n", mls ? ":" SYSTEMLOW : "");
+	fclose(fout);
+
+	return 0;
+}