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, 554 insertions, 0 deletions

diff --git a/drivers/net/wireless/intersil/hostap/hostap_80211_tx.c b/drivers/net/wireless/intersil/hostap/hostap_80211_tx.c
new file mode 100644
index 000000000..c47da0694
--- /dev/null
+++ b/drivers/net/wireless/intersil/hostap/hostap_80211_tx.c
@@ -0,0 +1,554 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/slab.h>
+#include <linux/export.h>
+#include <linux/etherdevice.h>
+
+#include "hostap_80211.h"
+#include "hostap_common.h"
+#include "hostap_wlan.h"
+#include "hostap.h"
+#include "hostap_ap.h"
+
+/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
+/* Ethernet-II snap header (RFC1042 for most EtherTypes) */
+static unsigned char rfc1042_header[] =
+{ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
+/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
+static unsigned char bridge_tunnel_header[] =
+{ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
+/* No encapsulation header if EtherType < 0x600 (=length) */
+
+void hostap_dump_tx_80211(const char *name, struct sk_buff *skb)
+{
+	struct ieee80211_hdr *hdr;
+	u16 fc;
+
+	hdr = (struct ieee80211_hdr *) skb->data;
+
+	printk(KERN_DEBUG "%s: TX len=%d jiffies=%ld\n",
+	       name, skb->len, jiffies);
+
+	if (skb->len < 2)
+		return;
+
+	fc = le16_to_cpu(hdr->frame_control);
+	printk(KERN_DEBUG "   FC=0x%04x (type=%d:%d)%s%s",
+	       fc, (fc & IEEE80211_FCTL_FTYPE) >> 2,
+	       (fc & IEEE80211_FCTL_STYPE) >> 4,
+	       fc & IEEE80211_FCTL_TODS ? " [ToDS]" : "",
+	       fc & IEEE80211_FCTL_FROMDS ? " [FromDS]" : "");
+
+	if (skb->len < IEEE80211_DATA_HDR3_LEN) {
+		printk("\n");
+		return;
+	}
+
+	printk(" dur=0x%04x seq=0x%04x\n", le16_to_cpu(hdr->duration_id),
+	       le16_to_cpu(hdr->seq_ctrl));
+
+	printk(KERN_DEBUG "   A1=%pM", hdr->addr1);
+	printk(" A2=%pM", hdr->addr2);
+	printk(" A3=%pM", hdr->addr3);
+	if (skb->len >= 30)
+		printk(" A4=%pM", hdr->addr4);
+	printk("\n");
+}
+
+
+/* hard_start_xmit function for data interfaces (wlan#, wlan#wds#, wlan#sta)
+ * Convert Ethernet header into a suitable IEEE 802.11 header depending on
+ * device configuration. */
+netdev_tx_t hostap_data_start_xmit(struct sk_buff *skb,
+				   struct net_device *dev)
+{
+	struct hostap_interface *iface;
+	local_info_t *local;
+	int need_headroom, need_tailroom = 0;
+	struct ieee80211_hdr hdr;
+	u16 fc, ethertype = 0;
+	enum {
+		WDS_NO = 0, WDS_OWN_FRAME, WDS_COMPLIANT_FRAME
+	} use_wds = WDS_NO;
+	u8 *encaps_data;
+	int hdr_len, encaps_len, skip_header_bytes;
+	int to_assoc_ap = 0;
+	struct hostap_skb_tx_data *meta;
+
+	iface = netdev_priv(dev);
+	local = iface->local;
+
+	if (skb->len < ETH_HLEN) {
+		printk(KERN_DEBUG "%s: hostap_data_start_xmit: short skb "
+		       "(len=%d)\n", dev->name, skb->len);
+		kfree_skb(skb);
+		return NETDEV_TX_OK;
+	}
+
+	if (local->ddev != dev) {
+		use_wds = (local->iw_mode == IW_MODE_MASTER &&
+			   !(local->wds_type & HOSTAP_WDS_STANDARD_FRAME)) ?
+			WDS_OWN_FRAME : WDS_COMPLIANT_FRAME;
+		if (dev == local->stadev) {
+			to_assoc_ap = 1;
+			use_wds = WDS_NO;
+		} else if (dev == local->apdev) {
+			printk(KERN_DEBUG "%s: prism2_tx: trying to use "
+			       "AP device with Ethernet net dev\n", dev->name);
+			kfree_skb(skb);
+			return NETDEV_TX_OK;
+		}
+	} else {
+		if (local->iw_mode == IW_MODE_REPEAT) {
+			printk(KERN_DEBUG "%s: prism2_tx: trying to use "
+			       "non-WDS link in Repeater mode\n", dev->name);
+			kfree_skb(skb);
+			return NETDEV_TX_OK;
+		} else if (local->iw_mode == IW_MODE_INFRA &&
+			   (local->wds_type & HOSTAP_WDS_AP_CLIENT) &&
+			   !ether_addr_equal(skb->data + ETH_ALEN, dev->dev_addr)) {
+			/* AP client mode: send frames with foreign src addr
+			 * using 4-addr WDS frames */
+			use_wds = WDS_COMPLIANT_FRAME;
+		}
+	}
+
+	/* Incoming skb->data: dst_addr[6], src_addr[6], proto[2], payload
+	 * ==>
+	 * Prism2 TX frame with 802.11 header:
+	 * txdesc (address order depending on used mode; includes dst_addr and
+	 * src_addr), possible encapsulation (RFC1042/Bridge-Tunnel;
+	 * proto[2], payload {, possible addr4[6]} */
+
+	ethertype = (skb->data[12] << 8) | skb->data[13];
+
+	memset(&hdr, 0, sizeof(hdr));
+
+	/* Length of data after IEEE 802.11 header */
+	encaps_data = NULL;
+	encaps_len = 0;
+	skip_header_bytes = ETH_HLEN;
+	if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
+		encaps_data = bridge_tunnel_header;
+		encaps_len = sizeof(bridge_tunnel_header);
+		skip_header_bytes -= 2;
+	} else if (ethertype >= 0x600) {
+		encaps_data = rfc1042_header;
+		encaps_len = sizeof(rfc1042_header);
+		skip_header_bytes -= 2;
+	}
+
+	fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA;
+	hdr_len = IEEE80211_DATA_HDR3_LEN;
+
+	if (use_wds != WDS_NO) {
+		/* Note! Prism2 station firmware has problems with sending real
+		 * 802.11 frames with four addresses; until these problems can
+		 * be fixed or worked around, 4-addr frames needed for WDS are
+		 * using incompatible format: FromDS flag is not set and the
+		 * fourth address is added after the frame payload; it is
+		 * assumed, that the receiving station knows how to handle this
+		 * frame format */
+
+		if (use_wds == WDS_COMPLIANT_FRAME) {
+			fc |= IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS;
+			/* From&To DS: Addr1 = RA, Addr2 = TA, Addr3 = DA,
+			 * Addr4 = SA */
+			skb_copy_from_linear_data_offset(skb, ETH_ALEN,
+							 &hdr.addr4, ETH_ALEN);
+			hdr_len += ETH_ALEN;
+		} else {
+			/* bogus 4-addr format to workaround Prism2 station
+			 * f/w bug */
+			fc |= IEEE80211_FCTL_TODS;
+			/* From DS: Addr1 = DA (used as RA),
+			 * Addr2 = BSSID (used as TA), Addr3 = SA (used as DA),
+			 */
+
+			/* SA from skb->data + ETH_ALEN will be added after
+			 * frame payload; use hdr.addr4 as a temporary buffer
+			 */
+			skb_copy_from_linear_data_offset(skb, ETH_ALEN,
+							 &hdr.addr4, ETH_ALEN);
+			need_tailroom += ETH_ALEN;
+		}
+
+		/* send broadcast and multicast frames to broadcast RA, if
+		 * configured; otherwise, use unicast RA of the WDS link */
+		if ((local->wds_type & HOSTAP_WDS_BROADCAST_RA) &&
+		    is_multicast_ether_addr(skb->data))
+			eth_broadcast_addr(hdr.addr1);
+		else if (iface->type == HOSTAP_INTERFACE_WDS)
+			memcpy(&hdr.addr1, iface->u.wds.remote_addr,
+			       ETH_ALEN);
+		else
+			memcpy(&hdr.addr1, local->bssid, ETH_ALEN);
+		memcpy(&hdr.addr2, dev->dev_addr, ETH_ALEN);
+		skb_copy_from_linear_data(skb, &hdr.addr3, ETH_ALEN);
+	} else if (local->iw_mode == IW_MODE_MASTER && !to_assoc_ap) {
+		fc |= IEEE80211_FCTL_FROMDS;
+		/* From DS: Addr1 = DA, Addr2 = BSSID, Addr3 = SA */
+		skb_copy_from_linear_data(skb, &hdr.addr1, ETH_ALEN);
+		memcpy(&hdr.addr2, dev->dev_addr, ETH_ALEN);
+		skb_copy_from_linear_data_offset(skb, ETH_ALEN, &hdr.addr3,
+						 ETH_ALEN);
+	} else if (local->iw_mode == IW_MODE_INFRA || to_assoc_ap) {
+		fc |= IEEE80211_FCTL_TODS;
+		/* To DS: Addr1 = BSSID, Addr2 = SA, Addr3 = DA */
+		memcpy(&hdr.addr1, to_assoc_ap ?
+		       local->assoc_ap_addr : local->bssid, ETH_ALEN);
+		skb_copy_from_linear_data_offset(skb, ETH_ALEN, &hdr.addr2,
+						 ETH_ALEN);
+		skb_copy_from_linear_data(skb, &hdr.addr3, ETH_ALEN);
+	} else if (local->iw_mode == IW_MODE_ADHOC) {
+		/* not From/To DS: Addr1 = DA, Addr2 = SA, Addr3 = BSSID */
+		skb_copy_from_linear_data(skb, &hdr.addr1, ETH_ALEN);
+		skb_copy_from_linear_data_offset(skb, ETH_ALEN, &hdr.addr2,
+						 ETH_ALEN);
+		memcpy(&hdr.addr3, local->bssid, ETH_ALEN);
+	}
+
+	hdr.frame_control = cpu_to_le16(fc);
+
+	skb_pull(skb, skip_header_bytes);
+	need_headroom = local->func->need_tx_headroom + hdr_len + encaps_len;
+	if (skb_tailroom(skb) < need_tailroom) {
+		skb = skb_unshare(skb, GFP_ATOMIC);
+		if (skb == NULL) {
+			iface->stats.tx_dropped++;
+			return NETDEV_TX_OK;
+		}
+		if (pskb_expand_head(skb, need_headroom, need_tailroom,
+				     GFP_ATOMIC)) {
+			kfree_skb(skb);
+			iface->stats.tx_dropped++;
+			return NETDEV_TX_OK;
+		}
+	} else if (skb_headroom(skb) < need_headroom) {
+		struct sk_buff *tmp = skb;
+		skb = skb_realloc_headroom(skb, need_headroom);
+		kfree_skb(tmp);
+		if (skb == NULL) {
+			iface->stats.tx_dropped++;
+			return NETDEV_TX_OK;
+		}
+	} else {
+		skb = skb_unshare(skb, GFP_ATOMIC);
+		if (skb == NULL) {
+			iface->stats.tx_dropped++;
+			return NETDEV_TX_OK;
+		}
+	}
+
+	if (encaps_data)
+		memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
+	memcpy(skb_push(skb, hdr_len), &hdr, hdr_len);
+	if (use_wds == WDS_OWN_FRAME) {
+		skb_put_data(skb, &hdr.addr4, ETH_ALEN);
+	}
+
+	iface->stats.tx_packets++;
+	iface->stats.tx_bytes += skb->len;
+
+	skb_reset_mac_header(skb);
+	meta = (struct hostap_skb_tx_data *) skb->cb;
+	memset(meta, 0, sizeof(*meta));
+	meta->magic = HOSTAP_SKB_TX_DATA_MAGIC;
+	if (use_wds)
+		meta->flags |= HOSTAP_TX_FLAGS_WDS;
+	meta->ethertype = ethertype;
+	meta->iface = iface;
+
+	/* Send IEEE 802.11 encapsulated frame using the master radio device */
+	skb->dev = local->dev;
+	dev_queue_xmit(skb);
+	return NETDEV_TX_OK;
+}
+
+
+/* hard_start_xmit function for hostapd wlan#ap interfaces */
+netdev_tx_t hostap_mgmt_start_xmit(struct sk_buff *skb,
+				   struct net_device *dev)
+{
+	struct hostap_interface *iface;
+	local_info_t *local;
+	struct hostap_skb_tx_data *meta;
+	struct ieee80211_hdr *hdr;
+	u16 fc;
+
+	iface = netdev_priv(dev);
+	local = iface->local;
+
+	if (skb->len < 10) {
+		printk(KERN_DEBUG "%s: hostap_mgmt_start_xmit: short skb "
+		       "(len=%d)\n", dev->name, skb->len);
+		kfree_skb(skb);
+		return NETDEV_TX_OK;
+	}
+
+	iface->stats.tx_packets++;
+	iface->stats.tx_bytes += skb->len;
+
+	meta = (struct hostap_skb_tx_data *) skb->cb;
+	memset(meta, 0, sizeof(*meta));
+	meta->magic = HOSTAP_SKB_TX_DATA_MAGIC;
+	meta->iface = iface;
+
+	if (skb->len >= IEEE80211_DATA_HDR3_LEN + sizeof(rfc1042_header) + 2) {
+		hdr = (struct ieee80211_hdr *) skb->data;
+		fc = le16_to_cpu(hdr->frame_control);
+		if (ieee80211_is_data(hdr->frame_control) &&
+		    (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DATA) {
+			u8 *pos = &skb->data[IEEE80211_DATA_HDR3_LEN +
+					     sizeof(rfc1042_header)];
+			meta->ethertype = (pos[0] << 8) | pos[1];
+		}
+	}
+
+	/* Send IEEE 802.11 encapsulated frame using the master radio device */
+	skb->dev = local->dev;
+	dev_queue_xmit(skb);
+	return NETDEV_TX_OK;
+}
+
+
+/* Called only from software IRQ */
+static struct sk_buff * hostap_tx_encrypt(struct sk_buff *skb,
+					  struct lib80211_crypt_data *crypt)
+{
+	struct hostap_interface *iface;
+	local_info_t *local;
+	struct ieee80211_hdr *hdr;
+	int prefix_len, postfix_len, hdr_len, res;
+
+	iface = netdev_priv(skb->dev);
+	local = iface->local;
+
+	if (skb->len < IEEE80211_DATA_HDR3_LEN) {
+		kfree_skb(skb);
+		return NULL;
+	}
+
+	if (local->tkip_countermeasures &&
+	    strcmp(crypt->ops->name, "TKIP") == 0) {
+		hdr = (struct ieee80211_hdr *) skb->data;
+		if (net_ratelimit()) {
+			printk(KERN_DEBUG "%s: TKIP countermeasures: dropped "
+			       "TX packet to %pM\n",
+			       local->dev->name, hdr->addr1);
+		}
+		kfree_skb(skb);
+		return NULL;
+	}
+
+	skb = skb_unshare(skb, GFP_ATOMIC);
+	if (skb == NULL)
+		return NULL;
+
+	prefix_len = crypt->ops->extra_mpdu_prefix_len +
+		crypt->ops->extra_msdu_prefix_len;
+	postfix_len = crypt->ops->extra_mpdu_postfix_len +
+		crypt->ops->extra_msdu_postfix_len;
+	if ((skb_headroom(skb) < prefix_len ||
+	     skb_tailroom(skb) < postfix_len) &&
+	    pskb_expand_head(skb, prefix_len, postfix_len, GFP_ATOMIC)) {
+		kfree_skb(skb);
+		return NULL;
+	}
+
+	hdr = (struct ieee80211_hdr *) skb->data;
+	hdr_len = hostap_80211_get_hdrlen(hdr->frame_control);
+
+	/* Host-based IEEE 802.11 fragmentation for TX is not yet supported, so
+	 * call both MSDU and MPDU encryption functions from here. */
+	atomic_inc(&crypt->refcnt);
+	res = 0;
+	if (crypt->ops->encrypt_msdu)
+		res = crypt->ops->encrypt_msdu(skb, hdr_len, crypt->priv);
+	if (res == 0 && crypt->ops->encrypt_mpdu)
+		res = crypt->ops->encrypt_mpdu(skb, hdr_len, crypt->priv);
+	atomic_dec(&crypt->refcnt);
+	if (res < 0) {
+		kfree_skb(skb);
+		return NULL;
+	}
+
+	return skb;
+}
+
+
+/* hard_start_xmit function for master radio interface wifi#.
+ * AP processing (TX rate control, power save buffering, etc.).
+ * Use hardware TX function to send the frame. */
+netdev_tx_t hostap_master_start_xmit(struct sk_buff *skb,
+				     struct net_device *dev)
+{
+	struct hostap_interface *iface;
+	local_info_t *local;
+	netdev_tx_t ret = NETDEV_TX_BUSY;
+	u16 fc;
+	struct hostap_tx_data tx;
+	ap_tx_ret tx_ret;
+	struct hostap_skb_tx_data *meta;
+	int no_encrypt = 0;
+	struct ieee80211_hdr *hdr;
+
+	iface = netdev_priv(dev);
+	local = iface->local;
+
+	tx.skb = skb;
+	tx.sta_ptr = NULL;
+
+	meta = (struct hostap_skb_tx_data *) skb->cb;
+	if (meta->magic != HOSTAP_SKB_TX_DATA_MAGIC) {
+		printk(KERN_DEBUG "%s: invalid skb->cb magic (0x%08x, "
+		       "expected 0x%08x)\n",
+		       dev->name, meta->magic, HOSTAP_SKB_TX_DATA_MAGIC);
+		ret = NETDEV_TX_OK;
+		iface->stats.tx_dropped++;
+		goto fail;
+	}
+
+	if (local->host_encrypt) {
+		/* Set crypt to default algorithm and key; will be replaced in
+		 * AP code if STA has own alg/key */
+		tx.crypt = local->crypt_info.crypt[local->crypt_info.tx_keyidx];
+		tx.host_encrypt = 1;
+	} else {
+		tx.crypt = NULL;
+		tx.host_encrypt = 0;
+	}
+
+	if (skb->len < 24) {
+		printk(KERN_DEBUG "%s: hostap_master_start_xmit: short skb "
+		       "(len=%d)\n", dev->name, skb->len);
+		ret = NETDEV_TX_OK;
+		iface->stats.tx_dropped++;
+		goto fail;
+	}
+
+	/* FIX (?):
+	 * Wi-Fi 802.11b test plan suggests that AP should ignore power save
+	 * bit in authentication and (re)association frames and assume tha
+	 * STA remains awake for the response. */
+	tx_ret = hostap_handle_sta_tx(local, &tx);
+	skb = tx.skb;
+	meta = (struct hostap_skb_tx_data *) skb->cb;
+	hdr = (struct ieee80211_hdr *) skb->data;
+	fc = le16_to_cpu(hdr->frame_control);
+	switch (tx_ret) {
+	case AP_TX_CONTINUE:
+		break;
+	case AP_TX_CONTINUE_NOT_AUTHORIZED:
+		if (local->ieee_802_1x &&
+		    ieee80211_is_data(hdr->frame_control) &&
+		    meta->ethertype != ETH_P_PAE &&
+		    !(meta->flags & HOSTAP_TX_FLAGS_WDS)) {
+			printk(KERN_DEBUG "%s: dropped frame to unauthorized "
+			       "port (IEEE 802.1X): ethertype=0x%04x\n",
+			       dev->name, meta->ethertype);
+			hostap_dump_tx_80211(dev->name, skb);
+
+			ret = NETDEV_TX_OK; /* drop packet */
+			iface->stats.tx_dropped++;
+			goto fail;
+		}
+		break;
+	case AP_TX_DROP:
+		ret = NETDEV_TX_OK; /* drop packet */
+		iface->stats.tx_dropped++;
+		goto fail;
+	case AP_TX_RETRY:
+		goto fail;
+	case AP_TX_BUFFERED:
+		/* do not free skb here, it will be freed when the
+		 * buffered frame is sent/timed out */
+		ret = NETDEV_TX_OK;
+		goto tx_exit;
+	}
+
+	/* Request TX callback if protocol version is 2 in 802.11 header;
+	 * this version 2 is a special case used between hostapd and kernel
+	 * driver */
+	if (((fc & IEEE80211_FCTL_VERS) == BIT(1)) &&
+	    local->ap && local->ap->tx_callback_idx && meta->tx_cb_idx == 0) {
+		meta->tx_cb_idx = local->ap->tx_callback_idx;
+
+		/* remove special version from the frame header */
+		fc &= ~IEEE80211_FCTL_VERS;
+		hdr->frame_control = cpu_to_le16(fc);
+	}
+
+	if (!ieee80211_is_data(hdr->frame_control)) {
+		no_encrypt = 1;
+		tx.crypt = NULL;
+	}
+
+	if (local->ieee_802_1x && meta->ethertype == ETH_P_PAE && tx.crypt &&
+	    !(fc & IEEE80211_FCTL_PROTECTED)) {
+		no_encrypt = 1;
+		PDEBUG(DEBUG_EXTRA2, "%s: TX: IEEE 802.1X - passing "
+		       "unencrypted EAPOL frame\n", dev->name);
+		tx.crypt = NULL; /* no encryption for IEEE 802.1X frames */
+	}
+
+	if (tx.crypt && (!tx.crypt->ops || !tx.crypt->ops->encrypt_mpdu))
+		tx.crypt = NULL;
+	else if ((tx.crypt ||
+		 local->crypt_info.crypt[local->crypt_info.tx_keyidx]) &&
+		 !no_encrypt) {
+		/* Add ISWEP flag both for firmware and host based encryption
+		 */
+		fc |= IEEE80211_FCTL_PROTECTED;
+		hdr->frame_control = cpu_to_le16(fc);
+	} else if (local->drop_unencrypted &&
+		   ieee80211_is_data(hdr->frame_control) &&
+		   meta->ethertype != ETH_P_PAE) {
+		if (net_ratelimit()) {
+			printk(KERN_DEBUG "%s: dropped unencrypted TX data "
+			       "frame (drop_unencrypted=1)\n", dev->name);
+		}
+		iface->stats.tx_dropped++;
+		ret = NETDEV_TX_OK;
+		goto fail;
+	}
+
+	if (tx.crypt) {
+		skb = hostap_tx_encrypt(skb, tx.crypt);
+		if (skb == NULL) {
+			printk(KERN_DEBUG "%s: TX - encryption failed\n",
+			       dev->name);
+			ret = NETDEV_TX_OK;
+			goto fail;
+		}
+		meta = (struct hostap_skb_tx_data *) skb->cb;
+		if (meta->magic != HOSTAP_SKB_TX_DATA_MAGIC) {
+			printk(KERN_DEBUG "%s: invalid skb->cb magic (0x%08x, "
+			       "expected 0x%08x) after hostap_tx_encrypt\n",
+			       dev->name, meta->magic,
+			       HOSTAP_SKB_TX_DATA_MAGIC);
+			ret = NETDEV_TX_OK;
+			iface->stats.tx_dropped++;
+			goto fail;
+		}
+	}
+
+	if (local->func->tx == NULL || local->func->tx(skb, dev)) {
+		ret = NETDEV_TX_OK;
+		iface->stats.tx_dropped++;
+	} else {
+		ret = NETDEV_TX_OK;
+		iface->stats.tx_packets++;
+		iface->stats.tx_bytes += skb->len;
+	}
+
+ fail:
+	if (ret == NETDEV_TX_OK && skb)
+		dev_kfree_skb(skb);
+ tx_exit:
+	if (tx.sta_ptr)
+		hostap_handle_sta_release(tx.sta_ptr);
+	return ret;
+}
+
+
+EXPORT_SYMBOL(hostap_master_start_xmit);