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, 547 insertions, 0 deletions

diff --git a/drivers/infiniband/core/ud_header.c b/drivers/infiniband/core/ud_header.c
new file mode 100644
index 000000000..64d9c492d
--- /dev/null
+++ b/drivers/infiniband/core/ud_header.c
@@ -0,0 +1,547 @@
+/*
+ * Copyright (c) 2004 Topspin Corporation.  All rights reserved.
+ * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/export.h>
+#include <linux/if_ether.h>
+#include <linux/ip.h>
+
+#include <rdma/ib_pack.h>
+
+#define STRUCT_FIELD(header, field) \
+	.struct_offset_bytes = offsetof(struct ib_unpacked_ ## header, field),      \
+	.struct_size_bytes   = sizeof_field(struct ib_unpacked_ ## header, field), \
+	.field_name          = #header ":" #field
+
+static const struct ib_field lrh_table[]  = {
+	{ STRUCT_FIELD(lrh, virtual_lane),
+	  .offset_words = 0,
+	  .offset_bits  = 0,
+	  .size_bits    = 4 },
+	{ STRUCT_FIELD(lrh, link_version),
+	  .offset_words = 0,
+	  .offset_bits  = 4,
+	  .size_bits    = 4 },
+	{ STRUCT_FIELD(lrh, service_level),
+	  .offset_words = 0,
+	  .offset_bits  = 8,
+	  .size_bits    = 4 },
+	{ RESERVED,
+	  .offset_words = 0,
+	  .offset_bits  = 12,
+	  .size_bits    = 2 },
+	{ STRUCT_FIELD(lrh, link_next_header),
+	  .offset_words = 0,
+	  .offset_bits  = 14,
+	  .size_bits    = 2 },
+	{ STRUCT_FIELD(lrh, destination_lid),
+	  .offset_words = 0,
+	  .offset_bits  = 16,
+	  .size_bits    = 16 },
+	{ RESERVED,
+	  .offset_words = 1,
+	  .offset_bits  = 0,
+	  .size_bits    = 5 },
+	{ STRUCT_FIELD(lrh, packet_length),
+	  .offset_words = 1,
+	  .offset_bits  = 5,
+	  .size_bits    = 11 },
+	{ STRUCT_FIELD(lrh, source_lid),
+	  .offset_words = 1,
+	  .offset_bits  = 16,
+	  .size_bits    = 16 }
+};
+
+static const struct ib_field eth_table[]  = {
+	{ STRUCT_FIELD(eth, dmac_h),
+	  .offset_words = 0,
+	  .offset_bits  = 0,
+	  .size_bits    = 32 },
+	{ STRUCT_FIELD(eth, dmac_l),
+	  .offset_words = 1,
+	  .offset_bits  = 0,
+	  .size_bits    = 16 },
+	{ STRUCT_FIELD(eth, smac_h),
+	  .offset_words = 1,
+	  .offset_bits  = 16,
+	  .size_bits    = 16 },
+	{ STRUCT_FIELD(eth, smac_l),
+	  .offset_words = 2,
+	  .offset_bits  = 0,
+	  .size_bits    = 32 },
+	{ STRUCT_FIELD(eth, type),
+	  .offset_words = 3,
+	  .offset_bits  = 0,
+	  .size_bits    = 16 }
+};
+
+static const struct ib_field vlan_table[]  = {
+	{ STRUCT_FIELD(vlan, tag),
+	  .offset_words = 0,
+	  .offset_bits  = 0,
+	  .size_bits    = 16 },
+	{ STRUCT_FIELD(vlan, type),
+	  .offset_words = 0,
+	  .offset_bits  = 16,
+	  .size_bits    = 16 }
+};
+
+static const struct ib_field ip4_table[]  = {
+	{ STRUCT_FIELD(ip4, ver),
+	  .offset_words = 0,
+	  .offset_bits  = 0,
+	  .size_bits    = 4 },
+	{ STRUCT_FIELD(ip4, hdr_len),
+	  .offset_words = 0,
+	  .offset_bits  = 4,
+	  .size_bits    = 4 },
+	{ STRUCT_FIELD(ip4, tos),
+	  .offset_words = 0,
+	  .offset_bits  = 8,
+	  .size_bits    = 8 },
+	{ STRUCT_FIELD(ip4, tot_len),
+	  .offset_words = 0,
+	  .offset_bits  = 16,
+	  .size_bits    = 16 },
+	{ STRUCT_FIELD(ip4, id),
+	  .offset_words = 1,
+	  .offset_bits  = 0,
+	  .size_bits    = 16 },
+	{ STRUCT_FIELD(ip4, frag_off),
+	  .offset_words = 1,
+	  .offset_bits  = 16,
+	  .size_bits    = 16 },
+	{ STRUCT_FIELD(ip4, ttl),
+	  .offset_words = 2,
+	  .offset_bits  = 0,
+	  .size_bits    = 8 },
+	{ STRUCT_FIELD(ip4, protocol),
+	  .offset_words = 2,
+	  .offset_bits  = 8,
+	  .size_bits    = 8 },
+	{ STRUCT_FIELD(ip4, check),
+	  .offset_words = 2,
+	  .offset_bits  = 16,
+	  .size_bits    = 16 },
+	{ STRUCT_FIELD(ip4, saddr),
+	  .offset_words = 3,
+	  .offset_bits  = 0,
+	  .size_bits    = 32 },
+	{ STRUCT_FIELD(ip4, daddr),
+	  .offset_words = 4,
+	  .offset_bits  = 0,
+	  .size_bits    = 32 }
+};
+
+static const struct ib_field udp_table[]  = {
+	{ STRUCT_FIELD(udp, sport),
+	  .offset_words = 0,
+	  .offset_bits  = 0,
+	  .size_bits    = 16 },
+	{ STRUCT_FIELD(udp, dport),
+	  .offset_words = 0,
+	  .offset_bits  = 16,
+	  .size_bits    = 16 },
+	{ STRUCT_FIELD(udp, length),
+	  .offset_words = 1,
+	  .offset_bits  = 0,
+	  .size_bits    = 16 },
+	{ STRUCT_FIELD(udp, csum),
+	  .offset_words = 1,
+	  .offset_bits  = 16,
+	  .size_bits    = 16 }
+};
+
+static const struct ib_field grh_table[]  = {
+	{ STRUCT_FIELD(grh, ip_version),
+	  .offset_words = 0,
+	  .offset_bits  = 0,
+	  .size_bits    = 4 },
+	{ STRUCT_FIELD(grh, traffic_class),
+	  .offset_words = 0,
+	  .offset_bits  = 4,
+	  .size_bits    = 8 },
+	{ STRUCT_FIELD(grh, flow_label),
+	  .offset_words = 0,
+	  .offset_bits  = 12,
+	  .size_bits    = 20 },
+	{ STRUCT_FIELD(grh, payload_length),
+	  .offset_words = 1,
+	  .offset_bits  = 0,
+	  .size_bits    = 16 },
+	{ STRUCT_FIELD(grh, next_header),
+	  .offset_words = 1,
+	  .offset_bits  = 16,
+	  .size_bits    = 8 },
+	{ STRUCT_FIELD(grh, hop_limit),
+	  .offset_words = 1,
+	  .offset_bits  = 24,
+	  .size_bits    = 8 },
+	{ STRUCT_FIELD(grh, source_gid),
+	  .offset_words = 2,
+	  .offset_bits  = 0,
+	  .size_bits    = 128 },
+	{ STRUCT_FIELD(grh, destination_gid),
+	  .offset_words = 6,
+	  .offset_bits  = 0,
+	  .size_bits    = 128 }
+};
+
+static const struct ib_field bth_table[]  = {
+	{ STRUCT_FIELD(bth, opcode),
+	  .offset_words = 0,
+	  .offset_bits  = 0,
+	  .size_bits    = 8 },
+	{ STRUCT_FIELD(bth, solicited_event),
+	  .offset_words = 0,
+	  .offset_bits  = 8,
+	  .size_bits    = 1 },
+	{ STRUCT_FIELD(bth, mig_req),
+	  .offset_words = 0,
+	  .offset_bits  = 9,
+	  .size_bits    = 1 },
+	{ STRUCT_FIELD(bth, pad_count),
+	  .offset_words = 0,
+	  .offset_bits  = 10,
+	  .size_bits    = 2 },
+	{ STRUCT_FIELD(bth, transport_header_version),
+	  .offset_words = 0,
+	  .offset_bits  = 12,
+	  .size_bits    = 4 },
+	{ STRUCT_FIELD(bth, pkey),
+	  .offset_words = 0,
+	  .offset_bits  = 16,
+	  .size_bits    = 16 },
+	{ RESERVED,
+	  .offset_words = 1,
+	  .offset_bits  = 0,
+	  .size_bits    = 8 },
+	{ STRUCT_FIELD(bth, destination_qpn),
+	  .offset_words = 1,
+	  .offset_bits  = 8,
+	  .size_bits    = 24 },
+	{ STRUCT_FIELD(bth, ack_req),
+	  .offset_words = 2,
+	  .offset_bits  = 0,
+	  .size_bits    = 1 },
+	{ RESERVED,
+	  .offset_words = 2,
+	  .offset_bits  = 1,
+	  .size_bits    = 7 },
+	{ STRUCT_FIELD(bth, psn),
+	  .offset_words = 2,
+	  .offset_bits  = 8,
+	  .size_bits    = 24 }
+};
+
+static const struct ib_field deth_table[] = {
+	{ STRUCT_FIELD(deth, qkey),
+	  .offset_words = 0,
+	  .offset_bits  = 0,
+	  .size_bits    = 32 },
+	{ RESERVED,
+	  .offset_words = 1,
+	  .offset_bits  = 0,
+	  .size_bits    = 8 },
+	{ STRUCT_FIELD(deth, source_qpn),
+	  .offset_words = 1,
+	  .offset_bits  = 8,
+	  .size_bits    = 24 }
+};
+
+__sum16 ib_ud_ip4_csum(struct ib_ud_header *header)
+{
+	struct iphdr iph;
+
+	iph.ihl		= 5;
+	iph.version	= 4;
+	iph.tos		= header->ip4.tos;
+	iph.tot_len	= header->ip4.tot_len;
+	iph.id		= header->ip4.id;
+	iph.frag_off	= header->ip4.frag_off;
+	iph.ttl		= header->ip4.ttl;
+	iph.protocol	= header->ip4.protocol;
+	iph.check	= 0;
+	iph.saddr	= header->ip4.saddr;
+	iph.daddr	= header->ip4.daddr;
+
+	return ip_fast_csum((u8 *)&iph, iph.ihl);
+}
+EXPORT_SYMBOL(ib_ud_ip4_csum);
+
+/**
+ * ib_ud_header_init - Initialize UD header structure
+ * @payload_bytes:Length of packet payload
+ * @lrh_present: specify if LRH is present
+ * @eth_present: specify if Eth header is present
+ * @vlan_present: packet is tagged vlan
+ * @grh_present: GRH flag (if non-zero, GRH will be included)
+ * @ip_version: if non-zero, IP header, V4 or V6, will be included
+ * @udp_present :if non-zero, UDP header will be included
+ * @immediate_present: specify if immediate data is present
+ * @header:Structure to initialize
+ */
+int ib_ud_header_init(int     payload_bytes,
+		      int    lrh_present,
+		      int    eth_present,
+		      int    vlan_present,
+		      int    grh_present,
+		      int    ip_version,
+		      int    udp_present,
+		      int    immediate_present,
+		      struct ib_ud_header *header)
+{
+	size_t udp_bytes = udp_present ? IB_UDP_BYTES : 0;
+
+	grh_present = grh_present && !ip_version;
+	memset(header, 0, sizeof *header);
+
+	/*
+	 * UDP header without IP header doesn't make sense
+	 */
+	if (udp_present && ip_version != 4 && ip_version != 6)
+		return -EINVAL;
+
+	if (lrh_present) {
+		u16 packet_length;
+
+		header->lrh.link_version     = 0;
+		header->lrh.link_next_header =
+			grh_present ? IB_LNH_IBA_GLOBAL : IB_LNH_IBA_LOCAL;
+		packet_length = (IB_LRH_BYTES	+
+				 IB_BTH_BYTES	+
+				 IB_DETH_BYTES	+
+				 (grh_present ? IB_GRH_BYTES : 0) +
+				 payload_bytes	+
+				 4		+ /* ICRC     */
+				 3) / 4;	  /* round up */
+		header->lrh.packet_length = cpu_to_be16(packet_length);
+	}
+
+	if (vlan_present)
+		header->eth.type = cpu_to_be16(ETH_P_8021Q);
+
+	if (ip_version == 6 || grh_present) {
+		header->grh.ip_version      = 6;
+		header->grh.payload_length  =
+			cpu_to_be16((udp_bytes        +
+				     IB_BTH_BYTES     +
+				     IB_DETH_BYTES    +
+				     payload_bytes    +
+				     4                + /* ICRC     */
+				     3) & ~3);          /* round up */
+		header->grh.next_header     = udp_present ? IPPROTO_UDP : 0x1b;
+	}
+
+	if (ip_version == 4) {
+		header->ip4.ver = 4; /* version 4 */
+		header->ip4.hdr_len = 5; /* 5 words */
+		header->ip4.tot_len =
+			cpu_to_be16(IB_IP4_BYTES   +
+				     udp_bytes     +
+				     IB_BTH_BYTES  +
+				     IB_DETH_BYTES +
+				     payload_bytes +
+				     4);     /* ICRC     */
+		header->ip4.protocol = IPPROTO_UDP;
+	}
+	if (udp_present && ip_version)
+		header->udp.length =
+			cpu_to_be16(IB_UDP_BYTES   +
+				     IB_BTH_BYTES  +
+				     IB_DETH_BYTES +
+				     payload_bytes +
+				     4);     /* ICRC     */
+
+	if (immediate_present)
+		header->bth.opcode           = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE;
+	else
+		header->bth.opcode           = IB_OPCODE_UD_SEND_ONLY;
+	header->bth.pad_count                = (4 - payload_bytes) & 3;
+	header->bth.transport_header_version = 0;
+
+	header->lrh_present = lrh_present;
+	header->eth_present = eth_present;
+	header->vlan_present = vlan_present;
+	header->grh_present = grh_present || (ip_version == 6);
+	header->ipv4_present = ip_version == 4;
+	header->udp_present = udp_present;
+	header->immediate_present = immediate_present;
+	return 0;
+}
+EXPORT_SYMBOL(ib_ud_header_init);
+
+/**
+ * ib_ud_header_pack - Pack UD header struct into wire format
+ * @header:UD header struct
+ * @buf:Buffer to pack into
+ *
+ * ib_ud_header_pack() packs the UD header structure @header into wire
+ * format in the buffer @buf.
+ */
+int ib_ud_header_pack(struct ib_ud_header *header,
+		      void                *buf)
+{
+	int len = 0;
+
+	if (header->lrh_present) {
+		ib_pack(lrh_table, ARRAY_SIZE(lrh_table),
+			&header->lrh, buf + len);
+		len += IB_LRH_BYTES;
+	}
+	if (header->eth_present) {
+		ib_pack(eth_table, ARRAY_SIZE(eth_table),
+			&header->eth, buf + len);
+		len += IB_ETH_BYTES;
+	}
+	if (header->vlan_present) {
+		ib_pack(vlan_table, ARRAY_SIZE(vlan_table),
+			&header->vlan, buf + len);
+		len += IB_VLAN_BYTES;
+	}
+	if (header->grh_present) {
+		ib_pack(grh_table, ARRAY_SIZE(grh_table),
+			&header->grh, buf + len);
+		len += IB_GRH_BYTES;
+	}
+	if (header->ipv4_present) {
+		ib_pack(ip4_table, ARRAY_SIZE(ip4_table),
+			&header->ip4, buf + len);
+		len += IB_IP4_BYTES;
+	}
+	if (header->udp_present) {
+		ib_pack(udp_table, ARRAY_SIZE(udp_table),
+			&header->udp, buf + len);
+		len += IB_UDP_BYTES;
+	}
+
+	ib_pack(bth_table, ARRAY_SIZE(bth_table),
+		&header->bth, buf + len);
+	len += IB_BTH_BYTES;
+
+	ib_pack(deth_table, ARRAY_SIZE(deth_table),
+		&header->deth, buf + len);
+	len += IB_DETH_BYTES;
+
+	if (header->immediate_present) {
+		memcpy(buf + len, &header->immediate_data, sizeof header->immediate_data);
+		len += sizeof header->immediate_data;
+	}
+
+	return len;
+}
+EXPORT_SYMBOL(ib_ud_header_pack);
+
+/**
+ * ib_ud_header_unpack - Unpack UD header struct from wire format
+ * @header:UD header struct
+ * @buf:Buffer to pack into
+ *
+ * ib_ud_header_pack() unpacks the UD header structure @header from wire
+ * format in the buffer @buf.
+ */
+int ib_ud_header_unpack(void                *buf,
+			struct ib_ud_header *header)
+{
+	ib_unpack(lrh_table, ARRAY_SIZE(lrh_table),
+		  buf, &header->lrh);
+	buf += IB_LRH_BYTES;
+
+	if (header->lrh.link_version != 0) {
+		pr_warn("Invalid LRH.link_version %u\n",
+			header->lrh.link_version);
+		return -EINVAL;
+	}
+
+	switch (header->lrh.link_next_header) {
+	case IB_LNH_IBA_LOCAL:
+		header->grh_present = 0;
+		break;
+
+	case IB_LNH_IBA_GLOBAL:
+		header->grh_present = 1;
+		ib_unpack(grh_table, ARRAY_SIZE(grh_table),
+			  buf, &header->grh);
+		buf += IB_GRH_BYTES;
+
+		if (header->grh.ip_version != 6) {
+			pr_warn("Invalid GRH.ip_version %u\n",
+				header->grh.ip_version);
+			return -EINVAL;
+		}
+		if (header->grh.next_header != 0x1b) {
+			pr_warn("Invalid GRH.next_header 0x%02x\n",
+				header->grh.next_header);
+			return -EINVAL;
+		}
+		break;
+
+	default:
+		pr_warn("Invalid LRH.link_next_header %u\n",
+			header->lrh.link_next_header);
+		return -EINVAL;
+	}
+
+	ib_unpack(bth_table, ARRAY_SIZE(bth_table),
+		  buf, &header->bth);
+	buf += IB_BTH_BYTES;
+
+	switch (header->bth.opcode) {
+	case IB_OPCODE_UD_SEND_ONLY:
+		header->immediate_present = 0;
+		break;
+	case IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE:
+		header->immediate_present = 1;
+		break;
+	default:
+		pr_warn("Invalid BTH.opcode 0x%02x\n", header->bth.opcode);
+		return -EINVAL;
+	}
+
+	if (header->bth.transport_header_version != 0) {
+		pr_warn("Invalid BTH.transport_header_version %u\n",
+			header->bth.transport_header_version);
+		return -EINVAL;
+	}
+
+	ib_unpack(deth_table, ARRAY_SIZE(deth_table),
+		  buf, &header->deth);
+	buf += IB_DETH_BYTES;
+
+	if (header->immediate_present)
+		memcpy(&header->immediate_data, buf, sizeof header->immediate_data);
+
+	return 0;
+}
+EXPORT_SYMBOL(ib_ud_header_unpack);