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().
  ...

1 files changed, 256 insertions, 0 deletions

diff --git a/drivers/char/hw_random/s390-trng.c b/drivers/char/hw_random/s390-trng.c
new file mode 100644
index 000000000..d27e32e9b
--- /dev/null
+++ b/drivers/char/hw_random/s390-trng.c
@@ -0,0 +1,256 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * s390 TRNG device driver
+ *
+ * Driver for the TRNG (true random number generation) command
+ * available via CPACF extension MSA 7 on the s390 arch.
+
+ * Copyright IBM Corp. 2017
+ * Author(s): Harald Freudenberger <freude@de.ibm.com>
+ */
+
+#define KMSG_COMPONENT "trng"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+
+#include <linux/hw_random.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/cpufeature.h>
+#include <linux/miscdevice.h>
+#include <linux/debugfs.h>
+#include <linux/atomic.h>
+#include <linux/random.h>
+#include <linux/sched/signal.h>
+#include <asm/debug.h>
+#include <asm/cpacf.h>
+#include <asm/archrandom.h>
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("IBM Corporation");
+MODULE_DESCRIPTION("s390 CPACF TRNG device driver");
+
+
+/* trng related debug feature things */
+
+static debug_info_t *debug_info;
+
+#define DEBUG_DBG(...)	debug_sprintf_event(debug_info, 6, ##__VA_ARGS__)
+#define DEBUG_INFO(...) debug_sprintf_event(debug_info, 5, ##__VA_ARGS__)
+#define DEBUG_WARN(...) debug_sprintf_event(debug_info, 4, ##__VA_ARGS__)
+#define DEBUG_ERR(...)	debug_sprintf_event(debug_info, 3, ##__VA_ARGS__)
+
+
+/* trng helpers */
+
+static atomic64_t trng_dev_counter = ATOMIC64_INIT(0);
+static atomic64_t trng_hwrng_counter = ATOMIC64_INIT(0);
+
+
+/* file io functions */
+
+static int trng_open(struct inode *inode, struct file *file)
+{
+	return nonseekable_open(inode, file);
+}
+
+static ssize_t trng_read(struct file *file, char __user *ubuf,
+			 size_t nbytes, loff_t *ppos)
+{
+	u8 buf[32];
+	u8 *p = buf;
+	unsigned int n;
+	ssize_t ret = 0;
+
+	/*
+	 * use buf for requests <= sizeof(buf),
+	 * otherwise allocate one page and fetch
+	 * pagewise.
+	 */
+
+	if (nbytes > sizeof(buf)) {
+		p = (u8 *) __get_free_page(GFP_KERNEL);
+		if (!p)
+			return -ENOMEM;
+	}
+
+	while (nbytes) {
+		if (need_resched()) {
+			if (signal_pending(current)) {
+				if (ret == 0)
+					ret = -ERESTARTSYS;
+				break;
+			}
+			schedule();
+		}
+		n = nbytes > PAGE_SIZE ? PAGE_SIZE : nbytes;
+		cpacf_trng(NULL, 0, p, n);
+		atomic64_add(n, &trng_dev_counter);
+		if (copy_to_user(ubuf, p, n)) {
+			ret = -EFAULT;
+			break;
+		}
+		nbytes -= n;
+		ubuf += n;
+		ret += n;
+	}
+
+	if (p != buf)
+		free_page((unsigned long) p);
+
+	DEBUG_DBG("trng_read()=%zd\n", ret);
+	return ret;
+}
+
+
+/* sysfs */
+
+static ssize_t trng_counter_show(struct device *dev,
+				 struct device_attribute *attr, char *buf)
+{
+	u64 dev_counter = atomic64_read(&trng_dev_counter);
+	u64 hwrng_counter = atomic64_read(&trng_hwrng_counter);
+	u64 arch_counter = atomic64_read(&s390_arch_random_counter);
+
+	return sysfs_emit(buf,
+			"trng:  %llu\n"
+			"hwrng: %llu\n"
+			"arch:  %llu\n"
+			"total: %llu\n",
+			dev_counter, hwrng_counter, arch_counter,
+			dev_counter + hwrng_counter + arch_counter);
+}
+static DEVICE_ATTR(byte_counter, 0444, trng_counter_show, NULL);
+
+static struct attribute *trng_dev_attrs[] = {
+	&dev_attr_byte_counter.attr,
+	NULL
+};
+
+static const struct attribute_group trng_dev_attr_group = {
+	.attrs = trng_dev_attrs
+};
+
+static const struct attribute_group *trng_dev_attr_groups[] = {
+	&trng_dev_attr_group,
+	NULL
+};
+
+static const struct file_operations trng_fops = {
+	.owner		= THIS_MODULE,
+	.open		= &trng_open,
+	.release	= NULL,
+	.read		= &trng_read,
+	.llseek		= noop_llseek,
+};
+
+static struct miscdevice trng_dev = {
+	.name	= "trng",
+	.minor	= MISC_DYNAMIC_MINOR,
+	.mode	= 0444,
+	.fops	= &trng_fops,
+	.groups = trng_dev_attr_groups,
+};
+
+
+/* hwrng_register */
+
+static inline void _trng_hwrng_read(u8 *buf, size_t len)
+{
+	cpacf_trng(NULL, 0, buf, len);
+	atomic64_add(len, &trng_hwrng_counter);
+}
+
+static int trng_hwrng_data_read(struct hwrng *rng, u32 *data)
+{
+	size_t len = sizeof(*data);
+
+	_trng_hwrng_read((u8 *) data, len);
+
+	DEBUG_DBG("trng_hwrng_data_read()=%zu\n", len);
+
+	return len;
+}
+
+static int trng_hwrng_read(struct hwrng *rng, void *data, size_t max, bool wait)
+{
+	size_t len = max <= PAGE_SIZE ? max : PAGE_SIZE;
+
+	_trng_hwrng_read((u8 *) data, len);
+
+	DEBUG_DBG("trng_hwrng_read()=%zu\n", len);
+
+	return len;
+}
+
+/*
+ * hwrng register struct
+ * The trng is supposed to have 100% entropy, and thus we register with a very
+ * high quality value. If we ever have a better driver in the future, we should
+ * change this value again when we merge this driver.
+ */
+static struct hwrng trng_hwrng_dev = {
+	.name		= "s390-trng",
+	.data_read	= trng_hwrng_data_read,
+	.read		= trng_hwrng_read,
+};
+
+
+/* init and exit */
+
+static void __init trng_debug_init(void)
+{
+	debug_info = debug_register("trng", 1, 1, 4 * sizeof(long));
+	debug_register_view(debug_info, &debug_sprintf_view);
+	debug_set_level(debug_info, 3);
+}
+
+static void trng_debug_exit(void)
+{
+	debug_unregister(debug_info);
+}
+
+static int __init trng_init(void)
+{
+	int ret;
+
+	trng_debug_init();
+
+	/* check if subfunction CPACF_PRNO_TRNG is available */
+	if (!cpacf_query_func(CPACF_PRNO, CPACF_PRNO_TRNG)) {
+		DEBUG_INFO("trng_init CPACF_PRNO_TRNG not available\n");
+		ret = -ENODEV;
+		goto out_dbg;
+	}
+
+	ret = misc_register(&trng_dev);
+	if (ret) {
+		DEBUG_WARN("trng_init misc_register() failed rc=%d\n", ret);
+		goto out_dbg;
+	}
+
+	ret = hwrng_register(&trng_hwrng_dev);
+	if (ret) {
+		DEBUG_WARN("trng_init hwrng_register() failed rc=%d\n", ret);
+		goto out_misc;
+	}
+
+	DEBUG_DBG("trng_init successful\n");
+
+	return 0;
+
+out_misc:
+	misc_deregister(&trng_dev);
+out_dbg:
+	trng_debug_exit();
+	return ret;
+}
+
+static void __exit trng_exit(void)
+{
+	hwrng_unregister(&trng_hwrng_dev);
+	misc_deregister(&trng_dev);
+	trng_debug_exit();
+}
+
+module_cpu_feature_match(S390_CPU_FEATURE_MSA, trng_init);
+module_exit(trng_exit);