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, 380 insertions, 0 deletions

diff --git a/arch/x86/um/ldt.c b/arch/x86/um/ldt.c
new file mode 100644
index 000000000..255a44dd4
--- /dev/null
+++ b/arch/x86/um/ldt.c
@@ -0,0 +1,380 @@
+/*
+ * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/syscalls.h>
+#include <linux/uaccess.h>
+#include <asm/unistd.h>
+#include <os.h>
+#include <skas.h>
+#include <sysdep/tls.h>
+
+static inline int modify_ldt (int func, void *ptr, unsigned long bytecount)
+{
+	return syscall(__NR_modify_ldt, func, ptr, bytecount);
+}
+
+static long write_ldt_entry(struct mm_id *mm_idp, int func,
+		     struct user_desc *desc, void **addr, int done)
+{
+	long res;
+	void *stub_addr;
+
+	BUILD_BUG_ON(sizeof(*desc) % sizeof(long));
+
+	res = syscall_stub_data(mm_idp, (unsigned long *)desc,
+				sizeof(*desc) / sizeof(long),
+				addr, &stub_addr);
+	if (!res) {
+		unsigned long args[] = { func,
+					 (unsigned long)stub_addr,
+					 sizeof(*desc),
+					 0, 0, 0 };
+		res = run_syscall_stub(mm_idp, __NR_modify_ldt, args,
+				       0, addr, done);
+	}
+
+	return res;
+}
+
+/*
+ * In skas mode, we hold our own ldt data in UML.
+ * Thus, the code implementing sys_modify_ldt_skas
+ * is very similar to (and mostly stolen from) sys_modify_ldt
+ * for arch/i386/kernel/ldt.c
+ * The routines copied and modified in part are:
+ * - read_ldt
+ * - read_default_ldt
+ * - write_ldt
+ * - sys_modify_ldt_skas
+ */
+
+static int read_ldt(void __user * ptr, unsigned long bytecount)
+{
+	int i, err = 0;
+	unsigned long size;
+	uml_ldt_t *ldt = &current->mm->context.arch.ldt;
+
+	if (!ldt->entry_count)
+		goto out;
+	if (bytecount > LDT_ENTRY_SIZE*LDT_ENTRIES)
+		bytecount = LDT_ENTRY_SIZE*LDT_ENTRIES;
+	err = bytecount;
+
+	mutex_lock(&ldt->lock);
+	if (ldt->entry_count <= LDT_DIRECT_ENTRIES) {
+		size = LDT_ENTRY_SIZE*LDT_DIRECT_ENTRIES;
+		if (size > bytecount)
+			size = bytecount;
+		if (copy_to_user(ptr, ldt->u.entries, size))
+			err = -EFAULT;
+		bytecount -= size;
+		ptr += size;
+	}
+	else {
+		for (i=0; i<ldt->entry_count/LDT_ENTRIES_PER_PAGE && bytecount;
+		     i++) {
+			size = PAGE_SIZE;
+			if (size > bytecount)
+				size = bytecount;
+			if (copy_to_user(ptr, ldt->u.pages[i], size)) {
+				err = -EFAULT;
+				break;
+			}
+			bytecount -= size;
+			ptr += size;
+		}
+	}
+	mutex_unlock(&ldt->lock);
+
+	if (bytecount == 0 || err == -EFAULT)
+		goto out;
+
+	if (clear_user(ptr, bytecount))
+		err = -EFAULT;
+
+out:
+	return err;
+}
+
+static int read_default_ldt(void __user * ptr, unsigned long bytecount)
+{
+	int err;
+
+	if (bytecount > 5*LDT_ENTRY_SIZE)
+		bytecount = 5*LDT_ENTRY_SIZE;
+
+	err = bytecount;
+	/*
+	 * UML doesn't support lcall7 and lcall27.
+	 * So, we don't really have a default ldt, but emulate
+	 * an empty ldt of common host default ldt size.
+	 */
+	if (clear_user(ptr, bytecount))
+		err = -EFAULT;
+
+	return err;
+}
+
+static int write_ldt(void __user * ptr, unsigned long bytecount, int func)
+{
+	uml_ldt_t *ldt = &current->mm->context.arch.ldt;
+	struct mm_id * mm_idp = &current->mm->context.id;
+	int i, err;
+	struct user_desc ldt_info;
+	struct ldt_entry entry0, *ldt_p;
+	void *addr = NULL;
+
+	err = -EINVAL;
+	if (bytecount != sizeof(ldt_info))
+		goto out;
+	err = -EFAULT;
+	if (copy_from_user(&ldt_info, ptr, sizeof(ldt_info)))
+		goto out;
+
+	err = -EINVAL;
+	if (ldt_info.entry_number >= LDT_ENTRIES)
+		goto out;
+	if (ldt_info.contents == 3) {
+		if (func == 1)
+			goto out;
+		if (ldt_info.seg_not_present == 0)
+			goto out;
+	}
+
+	mutex_lock(&ldt->lock);
+
+	err = write_ldt_entry(mm_idp, func, &ldt_info, &addr, 1);
+	if (err)
+		goto out_unlock;
+
+	if (ldt_info.entry_number >= ldt->entry_count &&
+	    ldt_info.entry_number >= LDT_DIRECT_ENTRIES) {
+		for (i=ldt->entry_count/LDT_ENTRIES_PER_PAGE;
+		     i*LDT_ENTRIES_PER_PAGE <= ldt_info.entry_number;
+		     i++) {
+			if (i == 0)
+				memcpy(&entry0, ldt->u.entries,
+				       sizeof(entry0));
+			ldt->u.pages[i] = (struct ldt_entry *)
+				__get_free_page(GFP_KERNEL|__GFP_ZERO);
+			if (!ldt->u.pages[i]) {
+				err = -ENOMEM;
+				/* Undo the change in host */
+				memset(&ldt_info, 0, sizeof(ldt_info));
+				write_ldt_entry(mm_idp, 1, &ldt_info, &addr, 1);
+				goto out_unlock;
+			}
+			if (i == 0) {
+				memcpy(ldt->u.pages[0], &entry0,
+				       sizeof(entry0));
+				memcpy(ldt->u.pages[0]+1, ldt->u.entries+1,
+				       sizeof(entry0)*(LDT_DIRECT_ENTRIES-1));
+			}
+			ldt->entry_count = (i + 1) * LDT_ENTRIES_PER_PAGE;
+		}
+	}
+	if (ldt->entry_count <= ldt_info.entry_number)
+		ldt->entry_count = ldt_info.entry_number + 1;
+
+	if (ldt->entry_count <= LDT_DIRECT_ENTRIES)
+		ldt_p = ldt->u.entries + ldt_info.entry_number;
+	else
+		ldt_p = ldt->u.pages[ldt_info.entry_number/LDT_ENTRIES_PER_PAGE] +
+			ldt_info.entry_number%LDT_ENTRIES_PER_PAGE;
+
+	if (ldt_info.base_addr == 0 && ldt_info.limit == 0 &&
+	   (func == 1 || LDT_empty(&ldt_info))) {
+		ldt_p->a = 0;
+		ldt_p->b = 0;
+	}
+	else{
+		if (func == 1)
+			ldt_info.useable = 0;
+		ldt_p->a = LDT_entry_a(&ldt_info);
+		ldt_p->b = LDT_entry_b(&ldt_info);
+	}
+	err = 0;
+
+out_unlock:
+	mutex_unlock(&ldt->lock);
+out:
+	return err;
+}
+
+static long do_modify_ldt_skas(int func, void __user *ptr,
+			       unsigned long bytecount)
+{
+	int ret = -ENOSYS;
+
+	switch (func) {
+		case 0:
+			ret = read_ldt(ptr, bytecount);
+			break;
+		case 1:
+		case 0x11:
+			ret = write_ldt(ptr, bytecount, func);
+			break;
+		case 2:
+			ret = read_default_ldt(ptr, bytecount);
+			break;
+	}
+	return ret;
+}
+
+static DEFINE_SPINLOCK(host_ldt_lock);
+static short dummy_list[9] = {0, -1};
+static short * host_ldt_entries = NULL;
+
+static void ldt_get_host_info(void)
+{
+	long ret;
+	struct ldt_entry * ldt;
+	short *tmp;
+	int i, size, k, order;
+
+	spin_lock(&host_ldt_lock);
+
+	if (host_ldt_entries != NULL) {
+		spin_unlock(&host_ldt_lock);
+		return;
+	}
+	host_ldt_entries = dummy_list+1;
+
+	spin_unlock(&host_ldt_lock);
+
+	for (i = LDT_PAGES_MAX-1, order=0; i; i>>=1, order++)
+		;
+
+	ldt = (struct ldt_entry *)
+	      __get_free_pages(GFP_KERNEL|__GFP_ZERO, order);
+	if (ldt == NULL) {
+		printk(KERN_ERR "ldt_get_host_info: couldn't allocate buffer "
+		       "for host ldt\n");
+		return;
+	}
+
+	ret = modify_ldt(0, ldt, (1<<order)*PAGE_SIZE);
+	if (ret < 0) {
+		printk(KERN_ERR "ldt_get_host_info: couldn't read host ldt\n");
+		goto out_free;
+	}
+	if (ret == 0) {
+		/* default_ldt is active, simply write an empty entry 0 */
+		host_ldt_entries = dummy_list;
+		goto out_free;
+	}
+
+	for (i=0, size=0; i<ret/LDT_ENTRY_SIZE; i++) {
+		if (ldt[i].a != 0 || ldt[i].b != 0)
+			size++;
+	}
+
+	if (size < ARRAY_SIZE(dummy_list))
+		host_ldt_entries = dummy_list;
+	else {
+		size = (size + 1) * sizeof(dummy_list[0]);
+		tmp = kmalloc(size, GFP_KERNEL);
+		if (tmp == NULL) {
+			printk(KERN_ERR "ldt_get_host_info: couldn't allocate "
+			       "host ldt list\n");
+			goto out_free;
+		}
+		host_ldt_entries = tmp;
+	}
+
+	for (i=0, k=0; i<ret/LDT_ENTRY_SIZE; i++) {
+		if (ldt[i].a != 0 || ldt[i].b != 0)
+			host_ldt_entries[k++] = i;
+	}
+	host_ldt_entries[k] = -1;
+
+out_free:
+	free_pages((unsigned long)ldt, order);
+}
+
+long init_new_ldt(struct mm_context *new_mm, struct mm_context *from_mm)
+{
+	struct user_desc desc;
+	short * num_p;
+	int i;
+	long page, err=0;
+	void *addr = NULL;
+
+
+	mutex_init(&new_mm->arch.ldt.lock);
+
+	if (!from_mm) {
+		memset(&desc, 0, sizeof(desc));
+		/*
+		 * Now we try to retrieve info about the ldt, we
+		 * inherited from the host. All ldt-entries found
+		 * will be reset in the following loop
+		 */
+		ldt_get_host_info();
+		for (num_p=host_ldt_entries; *num_p != -1; num_p++) {
+			desc.entry_number = *num_p;
+			err = write_ldt_entry(&new_mm->id, 1, &desc,
+					      &addr, *(num_p + 1) == -1);
+			if (err)
+				break;
+		}
+		new_mm->arch.ldt.entry_count = 0;
+
+		goto out;
+	}
+
+	/*
+	 * Our local LDT is used to supply the data for
+	 * modify_ldt(READLDT), if PTRACE_LDT isn't available,
+	 * i.e., we have to use the stub for modify_ldt, which
+	 * can't handle the big read buffer of up to 64kB.
+	 */
+	mutex_lock(&from_mm->arch.ldt.lock);
+	if (from_mm->arch.ldt.entry_count <= LDT_DIRECT_ENTRIES)
+		memcpy(new_mm->arch.ldt.u.entries, from_mm->arch.ldt.u.entries,
+		       sizeof(new_mm->arch.ldt.u.entries));
+	else {
+		i = from_mm->arch.ldt.entry_count / LDT_ENTRIES_PER_PAGE;
+		while (i-->0) {
+			page = __get_free_page(GFP_KERNEL|__GFP_ZERO);
+			if (!page) {
+				err = -ENOMEM;
+				break;
+			}
+			new_mm->arch.ldt.u.pages[i] =
+				(struct ldt_entry *) page;
+			memcpy(new_mm->arch.ldt.u.pages[i],
+			       from_mm->arch.ldt.u.pages[i], PAGE_SIZE);
+		}
+	}
+	new_mm->arch.ldt.entry_count = from_mm->arch.ldt.entry_count;
+	mutex_unlock(&from_mm->arch.ldt.lock);
+
+    out:
+	return err;
+}
+
+
+void free_ldt(struct mm_context *mm)
+{
+	int i;
+
+	if (mm->arch.ldt.entry_count > LDT_DIRECT_ENTRIES) {
+		i = mm->arch.ldt.entry_count / LDT_ENTRIES_PER_PAGE;
+		while (i-- > 0)
+			free_page((long) mm->arch.ldt.u.pages[i]);
+	}
+	mm->arch.ldt.entry_count = 0;
+}
+
+SYSCALL_DEFINE3(modify_ldt, int , func , void __user * , ptr ,
+		unsigned long , bytecount)
+{
+	/* See non-um modify_ldt() for why we do this cast */
+	return (unsigned int)do_modify_ldt_skas(func, ptr, bytecount);
+}