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, 579 insertions, 0 deletions

diff --git a/drivers/s390/char/keyboard.c b/drivers/s390/char/keyboard.c
new file mode 100644
index 000000000..567aedc03
--- /dev/null
+++ b/drivers/s390/char/keyboard.c
@@ -0,0 +1,579 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *    ebcdic keycode functions for s390 console drivers
+ *
+ *  S390 version
+ *    Copyright IBM Corp. 2003
+ *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
+ */
+
+#include <linux/module.h>
+#include <linux/sched/signal.h>
+#include <linux/slab.h>
+#include <linux/sysrq.h>
+
+#include <linux/consolemap.h>
+#include <linux/kbd_kern.h>
+#include <linux/kbd_diacr.h>
+#include <linux/uaccess.h>
+
+#include "keyboard.h"
+
+/*
+ * Handler Tables.
+ */
+#define K_HANDLERS\
+	k_self,		k_fn,		k_spec,		k_ignore,\
+	k_dead,		k_ignore,	k_ignore,	k_ignore,\
+	k_ignore,	k_ignore,	k_ignore,	k_ignore,\
+	k_ignore,	k_ignore,	k_ignore,	k_ignore
+
+typedef void (k_handler_fn)(struct kbd_data *, unsigned char);
+static k_handler_fn K_HANDLERS;
+static k_handler_fn *k_handler[16] = { K_HANDLERS };
+
+/* maximum values each key_handler can handle */
+static const int kbd_max_vals[] = {
+	255, ARRAY_SIZE(func_table) - 1, NR_FN_HANDLER - 1, 0,
+	NR_DEAD - 1, 0, 0, 0, 0, 0, 0, 0, 0, 0
+};
+static const int KBD_NR_TYPES = ARRAY_SIZE(kbd_max_vals);
+
+static const unsigned char ret_diacr[NR_DEAD] = {
+	'`',	/* dead_grave */
+	'\'',	/* dead_acute */
+	'^',	/* dead_circumflex */
+	'~',	/* dead_tilda */
+	'"',	/* dead_diaeresis */
+	',',	/* dead_cedilla */
+	'_',	/* dead_macron */
+	'U',	/* dead_breve */
+	'.',	/* dead_abovedot */
+	'*',	/* dead_abovering */
+	'=',	/* dead_doubleacute */
+	'c',	/* dead_caron */
+	'k',	/* dead_ogonek */
+	'i',	/* dead_iota */
+	'#',	/* dead_voiced_sound */
+	'o',	/* dead_semivoiced_sound */
+	'!',	/* dead_belowdot */
+	'?',	/* dead_hook */
+	'+',	/* dead_horn */
+	'-',	/* dead_stroke */
+	')',	/* dead_abovecomma */
+	'(',	/* dead_abovereversedcomma */
+	':',	/* dead_doublegrave */
+	'n',	/* dead_invertedbreve */
+	';',	/* dead_belowcomma */
+	'$',	/* dead_currency */
+	'@',	/* dead_greek */
+};
+
+/*
+ * Alloc/free of kbd_data structures.
+ */
+struct kbd_data *
+kbd_alloc(void) {
+	struct kbd_data *kbd;
+	int i;
+
+	kbd = kzalloc(sizeof(struct kbd_data), GFP_KERNEL);
+	if (!kbd)
+		goto out;
+	kbd->key_maps = kzalloc(sizeof(ebc_key_maps), GFP_KERNEL);
+	if (!kbd->key_maps)
+		goto out_kbd;
+	for (i = 0; i < ARRAY_SIZE(ebc_key_maps); i++) {
+		if (ebc_key_maps[i]) {
+			kbd->key_maps[i] = kmemdup(ebc_key_maps[i],
+						   sizeof(u_short) * NR_KEYS,
+						   GFP_KERNEL);
+			if (!kbd->key_maps[i])
+				goto out_maps;
+		}
+	}
+	kbd->func_table = kzalloc(sizeof(ebc_func_table), GFP_KERNEL);
+	if (!kbd->func_table)
+		goto out_maps;
+	for (i = 0; i < ARRAY_SIZE(ebc_func_table); i++) {
+		if (ebc_func_table[i]) {
+			kbd->func_table[i] = kstrdup(ebc_func_table[i],
+						     GFP_KERNEL);
+			if (!kbd->func_table[i])
+				goto out_func;
+		}
+	}
+	kbd->fn_handler =
+		kcalloc(NR_FN_HANDLER, sizeof(fn_handler_fn *), GFP_KERNEL);
+	if (!kbd->fn_handler)
+		goto out_func;
+	kbd->accent_table = kmemdup(ebc_accent_table,
+				    sizeof(struct kbdiacruc) * MAX_DIACR,
+				    GFP_KERNEL);
+	if (!kbd->accent_table)
+		goto out_fn_handler;
+	kbd->accent_table_size = ebc_accent_table_size;
+	return kbd;
+
+out_fn_handler:
+	kfree(kbd->fn_handler);
+out_func:
+	for (i = 0; i < ARRAY_SIZE(ebc_func_table); i++)
+		kfree(kbd->func_table[i]);
+	kfree(kbd->func_table);
+out_maps:
+	for (i = 0; i < ARRAY_SIZE(ebc_key_maps); i++)
+		kfree(kbd->key_maps[i]);
+	kfree(kbd->key_maps);
+out_kbd:
+	kfree(kbd);
+out:
+	return NULL;
+}
+
+void
+kbd_free(struct kbd_data *kbd)
+{
+	int i;
+
+	kfree(kbd->accent_table);
+	kfree(kbd->fn_handler);
+	for (i = 0; i < ARRAY_SIZE(ebc_func_table); i++)
+		kfree(kbd->func_table[i]);
+	kfree(kbd->func_table);
+	for (i = 0; i < ARRAY_SIZE(ebc_key_maps); i++)
+		kfree(kbd->key_maps[i]);
+	kfree(kbd->key_maps);
+	kfree(kbd);
+}
+
+/*
+ * Generate ascii -> ebcdic translation table from kbd_data.
+ */
+void
+kbd_ascebc(struct kbd_data *kbd, unsigned char *ascebc)
+{
+	unsigned short *keymap, keysym;
+	int i, j, k;
+
+	memset(ascebc, 0x40, 256);
+	for (i = 0; i < ARRAY_SIZE(ebc_key_maps); i++) {
+		keymap = kbd->key_maps[i];
+		if (!keymap)
+			continue;
+		for (j = 0; j < NR_KEYS; j++) {
+			k = ((i & 1) << 7) + j;
+			keysym = keymap[j];
+			if (KTYP(keysym) == (KT_LATIN | 0xf0) ||
+			    KTYP(keysym) == (KT_LETTER | 0xf0))
+				ascebc[KVAL(keysym)] = k;
+			else if (KTYP(keysym) == (KT_DEAD | 0xf0))
+				ascebc[ret_diacr[KVAL(keysym)]] = k;
+		}
+	}
+}
+
+#if 0
+/*
+ * Generate ebcdic -> ascii translation table from kbd_data.
+ */
+void
+kbd_ebcasc(struct kbd_data *kbd, unsigned char *ebcasc)
+{
+	unsigned short *keymap, keysym;
+	int i, j, k;
+
+	memset(ebcasc, ' ', 256);
+	for (i = 0; i < ARRAY_SIZE(ebc_key_maps); i++) {
+		keymap = kbd->key_maps[i];
+		if (!keymap)
+			continue;
+		for (j = 0; j < NR_KEYS; j++) {
+			keysym = keymap[j];
+			k = ((i & 1) << 7) + j;
+			if (KTYP(keysym) == (KT_LATIN | 0xf0) ||
+			    KTYP(keysym) == (KT_LETTER | 0xf0))
+				ebcasc[k] = KVAL(keysym);
+			else if (KTYP(keysym) == (KT_DEAD | 0xf0))
+				ebcasc[k] = ret_diacr[KVAL(keysym)];
+		}
+	}
+}
+#endif
+
+/*
+ * We have a combining character DIACR here, followed by the character CH.
+ * If the combination occurs in the table, return the corresponding value.
+ * Otherwise, if CH is a space or equals DIACR, return DIACR.
+ * Otherwise, conclude that DIACR was not combining after all,
+ * queue it and return CH.
+ */
+static unsigned int
+handle_diacr(struct kbd_data *kbd, unsigned int ch)
+{
+	int i, d;
+
+	d = kbd->diacr;
+	kbd->diacr = 0;
+
+	for (i = 0; i < kbd->accent_table_size; i++) {
+		if (kbd->accent_table[i].diacr == d &&
+		    kbd->accent_table[i].base == ch)
+			return kbd->accent_table[i].result;
+	}
+
+	if (ch == ' ' || ch == d)
+		return d;
+
+	kbd_put_queue(kbd->port, d);
+	return ch;
+}
+
+/*
+ * Handle dead key.
+ */
+static void
+k_dead(struct kbd_data *kbd, unsigned char value)
+{
+	value = ret_diacr[value];
+	kbd->diacr = (kbd->diacr ? handle_diacr(kbd, value) : value);
+}
+
+/*
+ * Normal character handler.
+ */
+static void
+k_self(struct kbd_data *kbd, unsigned char value)
+{
+	if (kbd->diacr)
+		value = handle_diacr(kbd, value);
+	kbd_put_queue(kbd->port, value);
+}
+
+/*
+ * Special key handlers
+ */
+static void
+k_ignore(struct kbd_data *kbd, unsigned char value)
+{
+}
+
+/*
+ * Function key handler.
+ */
+static void
+k_fn(struct kbd_data *kbd, unsigned char value)
+{
+	if (kbd->func_table[value])
+		kbd_puts_queue(kbd->port, kbd->func_table[value]);
+}
+
+static void
+k_spec(struct kbd_data *kbd, unsigned char value)
+{
+	if (value >= NR_FN_HANDLER)
+		return;
+	if (kbd->fn_handler[value])
+		kbd->fn_handler[value](kbd);
+}
+
+/*
+ * Put utf8 character to tty flip buffer.
+ * UTF-8 is defined for words of up to 31 bits,
+ * but we need only 16 bits here
+ */
+static void
+to_utf8(struct tty_port *port, ushort c)
+{
+	if (c < 0x80)
+		/*  0******* */
+		kbd_put_queue(port, c);
+	else if (c < 0x800) {
+		/* 110***** 10****** */
+		kbd_put_queue(port, 0xc0 | (c >> 6));
+		kbd_put_queue(port, 0x80 | (c & 0x3f));
+	} else {
+		/* 1110**** 10****** 10****** */
+		kbd_put_queue(port, 0xe0 | (c >> 12));
+		kbd_put_queue(port, 0x80 | ((c >> 6) & 0x3f));
+		kbd_put_queue(port, 0x80 | (c & 0x3f));
+	}
+}
+
+/*
+ * Process keycode.
+ */
+void
+kbd_keycode(struct kbd_data *kbd, unsigned int keycode)
+{
+	unsigned short keysym;
+	unsigned char type, value;
+
+	if (!kbd)
+		return;
+
+	if (keycode >= 384)
+		keysym = kbd->key_maps[5][keycode - 384];
+	else if (keycode >= 256)
+		keysym = kbd->key_maps[4][keycode - 256];
+	else if (keycode >= 128)
+		keysym = kbd->key_maps[1][keycode - 128];
+	else
+		keysym = kbd->key_maps[0][keycode];
+
+	type = KTYP(keysym);
+	if (type >= 0xf0) {
+		type -= 0xf0;
+		if (type == KT_LETTER)
+			type = KT_LATIN;
+		value = KVAL(keysym);
+#ifdef CONFIG_MAGIC_SYSRQ	       /* Handle the SysRq Hack */
+		if (kbd->sysrq) {
+			if (kbd->sysrq == K(KT_LATIN, '-')) {
+				kbd->sysrq = 0;
+				handle_sysrq(value);
+				return;
+			}
+			if (value == '-') {
+				kbd->sysrq = K(KT_LATIN, '-');
+				return;
+			}
+			/* Incomplete sysrq sequence. */
+			(*k_handler[KTYP(kbd->sysrq)])(kbd, KVAL(kbd->sysrq));
+			kbd->sysrq = 0;
+		} else if ((type == KT_LATIN && value == '^') ||
+			   (type == KT_DEAD && ret_diacr[value] == '^')) {
+			kbd->sysrq = K(type, value);
+			return;
+		}
+#endif
+		(*k_handler[type])(kbd, value);
+	} else
+		to_utf8(kbd->port, keysym);
+}
+
+/*
+ * Ioctl stuff.
+ */
+static int
+do_kdsk_ioctl(struct kbd_data *kbd, struct kbentry __user *user_kbe,
+	      int cmd, int perm)
+{
+	struct kbentry tmp;
+	unsigned long kb_index, kb_table;
+	ushort *key_map, val, ov;
+
+	if (copy_from_user(&tmp, user_kbe, sizeof(struct kbentry)))
+		return -EFAULT;
+	kb_index = (unsigned long) tmp.kb_index;
+#if NR_KEYS < 256
+	if (kb_index >= NR_KEYS)
+		return -EINVAL;
+#endif
+	kb_table = (unsigned long) tmp.kb_table;
+#if MAX_NR_KEYMAPS < 256
+	if (kb_table >= MAX_NR_KEYMAPS)
+		return -EINVAL;	
+	kb_table = array_index_nospec(kb_table , MAX_NR_KEYMAPS);
+#endif
+
+	switch (cmd) {
+	case KDGKBENT:
+		key_map = kbd->key_maps[kb_table];
+		if (key_map) {
+		    val = U(key_map[kb_index]);
+		    if (KTYP(val) >= KBD_NR_TYPES)
+			val = K_HOLE;
+		} else
+		    val = (kb_index ? K_HOLE : K_NOSUCHMAP);
+		return put_user(val, &user_kbe->kb_value);
+	case KDSKBENT:
+		if (!perm)
+			return -EPERM;
+		if (!kb_index && tmp.kb_value == K_NOSUCHMAP) {
+			/* disallocate map */
+			key_map = kbd->key_maps[kb_table];
+			if (key_map) {
+			    kbd->key_maps[kb_table] = NULL;
+			    kfree(key_map);
+			}
+			break;
+		}
+
+		if (KTYP(tmp.kb_value) >= KBD_NR_TYPES)
+			return -EINVAL;
+		if (KVAL(tmp.kb_value) > kbd_max_vals[KTYP(tmp.kb_value)])
+			return -EINVAL;
+
+		if (!(key_map = kbd->key_maps[kb_table])) {
+			int j;
+
+			key_map = kmalloc(sizeof(plain_map),
+						     GFP_KERNEL);
+			if (!key_map)
+				return -ENOMEM;
+			kbd->key_maps[kb_table] = key_map;
+			for (j = 0; j < NR_KEYS; j++)
+				key_map[j] = U(K_HOLE);
+		}
+		ov = U(key_map[kb_index]);
+		if (tmp.kb_value == ov)
+			break;	/* nothing to do */
+		/*
+		 * Attention Key.
+		 */
+		if (((ov == K_SAK) || (tmp.kb_value == K_SAK)) &&
+		    !capable(CAP_SYS_ADMIN))
+			return -EPERM;
+		key_map[kb_index] = U(tmp.kb_value);
+		break;
+	}
+	return 0;
+}
+
+static int
+do_kdgkb_ioctl(struct kbd_data *kbd, struct kbsentry __user *u_kbs,
+	       int cmd, int perm)
+{
+	unsigned char kb_func;
+	char *p;
+	int len;
+
+	/* Get u_kbs->kb_func. */
+	if (get_user(kb_func, &u_kbs->kb_func))
+		return -EFAULT;
+#if MAX_NR_FUNC < 256
+	if (kb_func >= MAX_NR_FUNC)
+		return -EINVAL;
+#endif
+
+	switch (cmd) {
+	case KDGKBSENT:
+		p = kbd->func_table[kb_func];
+		if (p) {
+			len = strlen(p);
+			if (len >= sizeof(u_kbs->kb_string))
+				len = sizeof(u_kbs->kb_string) - 1;
+			if (copy_to_user(u_kbs->kb_string, p, len))
+				return -EFAULT;
+		} else
+			len = 0;
+		if (put_user('\0', u_kbs->kb_string + len))
+			return -EFAULT;
+		break;
+	case KDSKBSENT:
+		if (!perm)
+			return -EPERM;
+		p = strndup_user(u_kbs->kb_string, sizeof(u_kbs->kb_string));
+		if (IS_ERR(p))
+			return PTR_ERR(p);
+		kfree(kbd->func_table[kb_func]);
+		kbd->func_table[kb_func] = p;
+		break;
+	}
+	return 0;
+}
+
+int kbd_ioctl(struct kbd_data *kbd, unsigned int cmd, unsigned long arg)
+{
+	struct tty_struct *tty;
+	void __user *argp;
+	unsigned int ct;
+	int perm;
+
+	argp = (void __user *)arg;
+
+	/*
+	 * To have permissions to do most of the vt ioctls, we either have
+	 * to be the owner of the tty, or have CAP_SYS_TTY_CONFIG.
+	 */
+	tty = tty_port_tty_get(kbd->port);
+	/* FIXME this test is pretty racy */
+	perm = current->signal->tty == tty || capable(CAP_SYS_TTY_CONFIG);
+	tty_kref_put(tty);
+	switch (cmd) {
+	case KDGKBTYPE:
+		return put_user(KB_101, (char __user *)argp);
+	case KDGKBENT:
+	case KDSKBENT:
+		return do_kdsk_ioctl(kbd, argp, cmd, perm);
+	case KDGKBSENT:
+	case KDSKBSENT:
+		return do_kdgkb_ioctl(kbd, argp, cmd, perm);
+	case KDGKBDIACR:
+	{
+		struct kbdiacrs __user *a = argp;
+		struct kbdiacr diacr;
+		int i;
+
+		if (put_user(kbd->accent_table_size, &a->kb_cnt))
+			return -EFAULT;
+		for (i = 0; i < kbd->accent_table_size; i++) {
+			diacr.diacr = kbd->accent_table[i].diacr;
+			diacr.base = kbd->accent_table[i].base;
+			diacr.result = kbd->accent_table[i].result;
+			if (copy_to_user(a->kbdiacr + i, &diacr, sizeof(struct kbdiacr)))
+			return -EFAULT;
+		}
+		return 0;
+	}
+	case KDGKBDIACRUC:
+	{
+		struct kbdiacrsuc __user *a = argp;
+
+		ct = kbd->accent_table_size;
+		if (put_user(ct, &a->kb_cnt))
+			return -EFAULT;
+		if (copy_to_user(a->kbdiacruc, kbd->accent_table,
+				 ct * sizeof(struct kbdiacruc)))
+			return -EFAULT;
+		return 0;
+	}
+	case KDSKBDIACR:
+	{
+		struct kbdiacrs __user *a = argp;
+		struct kbdiacr diacr;
+		int i;
+
+		if (!perm)
+			return -EPERM;
+		if (get_user(ct, &a->kb_cnt))
+			return -EFAULT;
+		if (ct >= MAX_DIACR)
+			return -EINVAL;
+		kbd->accent_table_size = ct;
+		for (i = 0; i < ct; i++) {
+			if (copy_from_user(&diacr, a->kbdiacr + i, sizeof(struct kbdiacr)))
+				return -EFAULT;
+			kbd->accent_table[i].diacr = diacr.diacr;
+			kbd->accent_table[i].base = diacr.base;
+			kbd->accent_table[i].result = diacr.result;
+		}
+		return 0;
+	}
+	case KDSKBDIACRUC:
+	{
+		struct kbdiacrsuc __user *a = argp;
+
+		if (!perm)
+			return -EPERM;
+		if (get_user(ct, &a->kb_cnt))
+			return -EFAULT;
+		if (ct >= MAX_DIACR)
+			return -EINVAL;
+		kbd->accent_table_size = ct;
+		if (copy_from_user(kbd->accent_table, a->kbdiacruc,
+				   ct * sizeof(struct kbdiacruc)))
+			return -EFAULT;
+		return 0;
+	}
+	default:
+		return -ENOIOCTLCMD;
+	}
+}
+
+EXPORT_SYMBOL(kbd_ioctl);
+EXPORT_SYMBOL(kbd_ascebc);
+EXPORT_SYMBOL(kbd_free);
+EXPORT_SYMBOL(kbd_alloc);
+EXPORT_SYMBOL(kbd_keycode);