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, 757 insertions, 0 deletions

diff --git a/drivers/usb/storage/datafab.c b/drivers/usb/storage/datafab.c
new file mode 100644
index 000000000..bcc4a2fad
--- /dev/null
+++ b/drivers/usb/storage/datafab.c
@@ -0,0 +1,757 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Driver for Datafab USB Compact Flash reader
+ *
+ * datafab driver v0.1:
+ *
+ * First release
+ *
+ * Current development and maintenance by:
+ *   (c) 2000 Jimmie Mayfield (mayfield+datafab@sackheads.org)
+ *
+ *   Many thanks to Robert Baruch for the SanDisk SmartMedia reader driver
+ *   which I used as a template for this driver.
+ *
+ *   Some bugfixes and scatter-gather code by Gregory P. Smith 
+ *   (greg-usb@electricrain.com)
+ *
+ *   Fix for media change by Joerg Schneider (js@joergschneider.com)
+ *
+ * Other contributors:
+ *   (c) 2002 Alan Stern <stern@rowland.org>
+ */
+
+/*
+ * This driver attempts to support USB CompactFlash reader/writer devices
+ * based on Datafab USB-to-ATA chips.  It was specifically developed for the 
+ * Datafab MDCFE-B USB CompactFlash reader but has since been found to work 
+ * with a variety of Datafab-based devices from a number of manufacturers.
+ * I've received a report of this driver working with a Datafab-based
+ * SmartMedia device though please be aware that I'm personally unable to
+ * test SmartMedia support.
+ *
+ * This driver supports reading and writing.  If you're truly paranoid,
+ * however, you can force the driver into a write-protected state by setting
+ * the WP enable bits in datafab_handle_mode_sense().  See the comments
+ * in that routine.
+ */
+
+#include <linux/errno.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+
+#include "usb.h"
+#include "transport.h"
+#include "protocol.h"
+#include "debug.h"
+#include "scsiglue.h"
+
+#define DRV_NAME "ums-datafab"
+
+MODULE_DESCRIPTION("Driver for Datafab USB Compact Flash reader");
+MODULE_AUTHOR("Jimmie Mayfield <mayfield+datafab@sackheads.org>");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS(USB_STORAGE);
+
+struct datafab_info {
+	unsigned long   sectors;	/* total sector count */
+	unsigned long   ssize;		/* sector size in bytes */
+	signed char	lun;		/* used for dual-slot readers */
+
+	/* the following aren't used yet */
+	unsigned char   sense_key;
+	unsigned long   sense_asc;	/* additional sense code */
+	unsigned long   sense_ascq;	/* additional sense code qualifier */
+};
+
+static int datafab_determine_lun(struct us_data *us,
+				 struct datafab_info *info);
+
+
+/*
+ * The table of devices
+ */
+#define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
+		    vendorName, productName, useProtocol, useTransport, \
+		    initFunction, flags) \
+{ USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
+  .driver_info = (flags) }
+
+static struct usb_device_id datafab_usb_ids[] = {
+#	include "unusual_datafab.h"
+	{ }		/* Terminating entry */
+};
+MODULE_DEVICE_TABLE(usb, datafab_usb_ids);
+
+#undef UNUSUAL_DEV
+
+/*
+ * The flags table
+ */
+#define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \
+		    vendor_name, product_name, use_protocol, use_transport, \
+		    init_function, Flags) \
+{ \
+	.vendorName = vendor_name,	\
+	.productName = product_name,	\
+	.useProtocol = use_protocol,	\
+	.useTransport = use_transport,	\
+	.initFunction = init_function,	\
+}
+
+static struct us_unusual_dev datafab_unusual_dev_list[] = {
+#	include "unusual_datafab.h"
+	{ }		/* Terminating entry */
+};
+
+#undef UNUSUAL_DEV
+
+
+static inline int
+datafab_bulk_read(struct us_data *us, unsigned char *data, unsigned int len) {
+	if (len == 0)
+		return USB_STOR_XFER_GOOD;
+
+	usb_stor_dbg(us, "len = %d\n", len);
+	return usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
+			data, len, NULL);
+}
+
+
+static inline int
+datafab_bulk_write(struct us_data *us, unsigned char *data, unsigned int len) {
+	if (len == 0)
+		return USB_STOR_XFER_GOOD;
+
+	usb_stor_dbg(us, "len = %d\n", len);
+	return usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
+			data, len, NULL);
+}
+
+
+static int datafab_read_data(struct us_data *us,
+			     struct datafab_info *info,
+			     u32 sector,
+			     u32 sectors)
+{
+	unsigned char *command = us->iobuf;
+	unsigned char *buffer;
+	unsigned char  thistime;
+	unsigned int totallen, alloclen;
+	int len, result;
+	unsigned int sg_offset = 0;
+	struct scatterlist *sg = NULL;
+
+	// we're working in LBA mode.  according to the ATA spec, 
+	// we can support up to 28-bit addressing.  I don't know if Datafab
+	// supports beyond 24-bit addressing.  It's kind of hard to test 
+	// since it requires > 8GB CF card.
+	//
+	if (sectors > 0x0FFFFFFF)
+		return USB_STOR_TRANSPORT_ERROR;
+
+	if (info->lun == -1) {
+		result = datafab_determine_lun(us, info);
+		if (result != USB_STOR_TRANSPORT_GOOD)
+			return result;
+	}
+
+	totallen = sectors * info->ssize;
+
+	// Since we don't read more than 64 KB at a time, we have to create
+	// a bounce buffer and move the data a piece at a time between the
+	// bounce buffer and the actual transfer buffer.
+
+	alloclen = min(totallen, 65536u);
+	buffer = kmalloc(alloclen, GFP_NOIO);
+	if (buffer == NULL)
+		return USB_STOR_TRANSPORT_ERROR;
+
+	do {
+		// loop, never allocate or transfer more than 64k at once
+		// (min(128k, 255*info->ssize) is the real limit)
+
+		len = min(totallen, alloclen);
+		thistime = (len / info->ssize) & 0xff;
+
+		command[0] = 0;
+		command[1] = thistime;
+		command[2] = sector & 0xFF;
+		command[3] = (sector >> 8) & 0xFF;
+		command[4] = (sector >> 16) & 0xFF;
+
+		command[5] = 0xE0 + (info->lun << 4);
+		command[5] |= (sector >> 24) & 0x0F;
+		command[6] = 0x20;
+		command[7] = 0x01;
+
+		// send the read command
+		result = datafab_bulk_write(us, command, 8);
+		if (result != USB_STOR_XFER_GOOD)
+			goto leave;
+
+		// read the result
+		result = datafab_bulk_read(us, buffer, len);
+		if (result != USB_STOR_XFER_GOOD)
+			goto leave;
+
+		// Store the data in the transfer buffer
+		usb_stor_access_xfer_buf(buffer, len, us->srb,
+				 &sg, &sg_offset, TO_XFER_BUF);
+
+		sector += thistime;
+		totallen -= len;
+	} while (totallen > 0);
+
+	kfree(buffer);
+	return USB_STOR_TRANSPORT_GOOD;
+
+ leave:
+	kfree(buffer);
+	return USB_STOR_TRANSPORT_ERROR;
+}
+
+
+static int datafab_write_data(struct us_data *us,
+			      struct datafab_info *info,
+			      u32 sector,
+			      u32 sectors)
+{
+	unsigned char *command = us->iobuf;
+	unsigned char *reply = us->iobuf;
+	unsigned char *buffer;
+	unsigned char thistime;
+	unsigned int totallen, alloclen;
+	int len, result;
+	unsigned int sg_offset = 0;
+	struct scatterlist *sg = NULL;
+
+	// we're working in LBA mode.  according to the ATA spec, 
+	// we can support up to 28-bit addressing.  I don't know if Datafab
+	// supports beyond 24-bit addressing.  It's kind of hard to test 
+	// since it requires > 8GB CF card.
+	//
+	if (sectors > 0x0FFFFFFF)
+		return USB_STOR_TRANSPORT_ERROR;
+
+	if (info->lun == -1) {
+		result = datafab_determine_lun(us, info);
+		if (result != USB_STOR_TRANSPORT_GOOD)
+			return result;
+	}
+
+	totallen = sectors * info->ssize;
+
+	// Since we don't write more than 64 KB at a time, we have to create
+	// a bounce buffer and move the data a piece at a time between the
+	// bounce buffer and the actual transfer buffer.
+
+	alloclen = min(totallen, 65536u);
+	buffer = kmalloc(alloclen, GFP_NOIO);
+	if (buffer == NULL)
+		return USB_STOR_TRANSPORT_ERROR;
+
+	do {
+		// loop, never allocate or transfer more than 64k at once
+		// (min(128k, 255*info->ssize) is the real limit)
+
+		len = min(totallen, alloclen);
+		thistime = (len / info->ssize) & 0xff;
+
+		// Get the data from the transfer buffer
+		usb_stor_access_xfer_buf(buffer, len, us->srb,
+				&sg, &sg_offset, FROM_XFER_BUF);
+
+		command[0] = 0;
+		command[1] = thistime;
+		command[2] = sector & 0xFF;
+		command[3] = (sector >> 8) & 0xFF;
+		command[4] = (sector >> 16) & 0xFF;
+
+		command[5] = 0xE0 + (info->lun << 4);
+		command[5] |= (sector >> 24) & 0x0F;
+		command[6] = 0x30;
+		command[7] = 0x02;
+
+		// send the command
+		result = datafab_bulk_write(us, command, 8);
+		if (result != USB_STOR_XFER_GOOD)
+			goto leave;
+
+		// send the data
+		result = datafab_bulk_write(us, buffer, len);
+		if (result != USB_STOR_XFER_GOOD)
+			goto leave;
+
+		// read the result
+		result = datafab_bulk_read(us, reply, 2);
+		if (result != USB_STOR_XFER_GOOD)
+			goto leave;
+
+		if (reply[0] != 0x50 && reply[1] != 0) {
+			usb_stor_dbg(us, "Gah! write return code: %02x %02x\n",
+				     reply[0], reply[1]);
+			goto leave;
+		}
+
+		sector += thistime;
+		totallen -= len;
+	} while (totallen > 0);
+
+	kfree(buffer);
+	return USB_STOR_TRANSPORT_GOOD;
+
+ leave:
+	kfree(buffer);
+	return USB_STOR_TRANSPORT_ERROR;
+}
+
+
+static int datafab_determine_lun(struct us_data *us,
+				 struct datafab_info *info)
+{
+	// Dual-slot readers can be thought of as dual-LUN devices.
+	// We need to determine which card slot is being used.
+	// We'll send an IDENTIFY DEVICE command and see which LUN responds...
+	//
+	// There might be a better way of doing this?
+
+	static unsigned char scommand[8] = { 0, 1, 0, 0, 0, 0xa0, 0xec, 1 };
+	unsigned char *command = us->iobuf;
+	unsigned char *buf;
+	int count = 0, rc;
+
+	if (!info)
+		return USB_STOR_TRANSPORT_ERROR;
+
+	memcpy(command, scommand, 8);
+	buf = kmalloc(512, GFP_NOIO);
+	if (!buf)
+		return USB_STOR_TRANSPORT_ERROR;
+
+	usb_stor_dbg(us, "locating...\n");
+
+	// we'll try 3 times before giving up...
+	//
+	while (count++ < 3) {
+		command[5] = 0xa0;
+
+		rc = datafab_bulk_write(us, command, 8);
+		if (rc != USB_STOR_XFER_GOOD) {
+			rc = USB_STOR_TRANSPORT_ERROR;
+			goto leave;
+		}
+
+		rc = datafab_bulk_read(us, buf, 512);
+		if (rc == USB_STOR_XFER_GOOD) {
+			info->lun = 0;
+			rc = USB_STOR_TRANSPORT_GOOD;
+			goto leave;
+		}
+
+		command[5] = 0xb0;
+
+		rc = datafab_bulk_write(us, command, 8);
+		if (rc != USB_STOR_XFER_GOOD) {
+			rc = USB_STOR_TRANSPORT_ERROR;
+			goto leave;
+		}
+
+		rc = datafab_bulk_read(us, buf, 512);
+		if (rc == USB_STOR_XFER_GOOD) {
+			info->lun = 1;
+			rc = USB_STOR_TRANSPORT_GOOD;
+			goto leave;
+		}
+
+		msleep(20);
+	}
+
+	rc = USB_STOR_TRANSPORT_ERROR;
+
+ leave:
+	kfree(buf);
+	return rc;
+}
+
+static int datafab_id_device(struct us_data *us,
+			     struct datafab_info *info)
+{
+	// this is a variation of the ATA "IDENTIFY DEVICE" command...according
+	// to the ATA spec, 'Sector Count' isn't used but the Windows driver
+	// sets this bit so we do too...
+	//
+	static unsigned char scommand[8] = { 0, 1, 0, 0, 0, 0xa0, 0xec, 1 };
+	unsigned char *command = us->iobuf;
+	unsigned char *reply;
+	int rc;
+
+	if (!info)
+		return USB_STOR_TRANSPORT_ERROR;
+
+	if (info->lun == -1) {
+		rc = datafab_determine_lun(us, info);
+		if (rc != USB_STOR_TRANSPORT_GOOD)
+			return rc;
+	}
+
+	memcpy(command, scommand, 8);
+	reply = kmalloc(512, GFP_NOIO);
+	if (!reply)
+		return USB_STOR_TRANSPORT_ERROR;
+
+	command[5] += (info->lun << 4);
+
+	rc = datafab_bulk_write(us, command, 8);
+	if (rc != USB_STOR_XFER_GOOD) {
+		rc = USB_STOR_TRANSPORT_ERROR;
+		goto leave;
+	}
+
+	// we'll go ahead and extract the media capacity while we're here...
+	//
+	rc = datafab_bulk_read(us, reply, 512);
+	if (rc == USB_STOR_XFER_GOOD) {
+		// capacity is at word offset 57-58
+		//
+		info->sectors = ((u32)(reply[117]) << 24) | 
+				((u32)(reply[116]) << 16) |
+				((u32)(reply[115]) <<  8) | 
+				((u32)(reply[114])      );
+		rc = USB_STOR_TRANSPORT_GOOD;
+		goto leave;
+	}
+
+	rc = USB_STOR_TRANSPORT_ERROR;
+
+ leave:
+	kfree(reply);
+	return rc;
+}
+
+
+static int datafab_handle_mode_sense(struct us_data *us,
+				     struct scsi_cmnd * srb, 
+				     int sense_6)
+{
+	static unsigned char rw_err_page[12] = {
+		0x1, 0xA, 0x21, 1, 0, 0, 0, 0, 1, 0, 0, 0
+	};
+	static unsigned char cache_page[12] = {
+		0x8, 0xA, 0x1, 0, 0, 0, 0, 0, 0, 0, 0, 0
+	};
+	static unsigned char rbac_page[12] = {
+		0x1B, 0xA, 0, 0x81, 0, 0, 0, 0, 0, 0, 0, 0
+	};
+	static unsigned char timer_page[8] = {
+		0x1C, 0x6, 0, 0, 0, 0
+	};
+	unsigned char pc, page_code;
+	unsigned int i = 0;
+	struct datafab_info *info = (struct datafab_info *) (us->extra);
+	unsigned char *ptr = us->iobuf;
+
+	// most of this stuff is just a hack to get things working.  the
+	// datafab reader doesn't present a SCSI interface so we
+	// fudge the SCSI commands...
+	//
+
+	pc = srb->cmnd[2] >> 6;
+	page_code = srb->cmnd[2] & 0x3F;
+
+	switch (pc) {
+	   case 0x0:
+		   usb_stor_dbg(us, "Current values\n");
+		break;
+	   case 0x1:
+		   usb_stor_dbg(us, "Changeable values\n");
+		break;
+	   case 0x2:
+		   usb_stor_dbg(us, "Default values\n");
+		break;
+	   case 0x3:
+		   usb_stor_dbg(us, "Saves values\n");
+		break;
+	}
+
+	memset(ptr, 0, 8);
+	if (sense_6) {
+		ptr[2] = 0x00;		// WP enable: 0x80
+		i = 4;
+	} else {
+		ptr[3] = 0x00;		// WP enable: 0x80
+		i = 8;
+	}
+
+	switch (page_code) {
+	   default:
+		// vendor-specific mode
+		info->sense_key = 0x05;
+		info->sense_asc = 0x24;
+		info->sense_ascq = 0x00;
+		return USB_STOR_TRANSPORT_FAILED;
+
+	   case 0x1:
+		memcpy(ptr + i, rw_err_page, sizeof(rw_err_page));
+		i += sizeof(rw_err_page);
+		break;
+
+	   case 0x8:
+		memcpy(ptr + i, cache_page, sizeof(cache_page));
+		i += sizeof(cache_page);
+		break;
+
+	   case 0x1B:
+		memcpy(ptr + i, rbac_page, sizeof(rbac_page));
+		i += sizeof(rbac_page);
+		break;
+
+	   case 0x1C:
+		memcpy(ptr + i, timer_page, sizeof(timer_page));
+		i += sizeof(timer_page);
+		break;
+
+	   case 0x3F:		// retrieve all pages
+		memcpy(ptr + i, timer_page, sizeof(timer_page));
+		i += sizeof(timer_page);
+		memcpy(ptr + i, rbac_page, sizeof(rbac_page));
+		i += sizeof(rbac_page);
+		memcpy(ptr + i, cache_page, sizeof(cache_page));
+		i += sizeof(cache_page);
+		memcpy(ptr + i, rw_err_page, sizeof(rw_err_page));
+		i += sizeof(rw_err_page);
+		break;
+	}
+
+	if (sense_6)
+		ptr[0] = i - 1;
+	else
+		((__be16 *) ptr)[0] = cpu_to_be16(i - 2);
+	usb_stor_set_xfer_buf(ptr, i, srb);
+
+	return USB_STOR_TRANSPORT_GOOD;
+}
+
+static void datafab_info_destructor(void *extra)
+{
+	// this routine is a placeholder...
+	// currently, we don't allocate any extra memory so we're okay
+}
+
+
+// Transport for the Datafab MDCFE-B
+//
+static int datafab_transport(struct scsi_cmnd *srb, struct us_data *us)
+{
+	struct datafab_info *info;
+	int rc;
+	unsigned long block, blocks;
+	unsigned char *ptr = us->iobuf;
+	static unsigned char inquiry_reply[8] = {
+		0x00, 0x80, 0x00, 0x01, 0x1F, 0x00, 0x00, 0x00
+	};
+
+	if (!us->extra) {
+		us->extra = kzalloc(sizeof(struct datafab_info), GFP_NOIO);
+		if (!us->extra)
+			return USB_STOR_TRANSPORT_ERROR;
+
+		us->extra_destructor = datafab_info_destructor;
+  		((struct datafab_info *)us->extra)->lun = -1;
+	}
+
+	info = (struct datafab_info *) (us->extra);
+
+	if (srb->cmnd[0] == INQUIRY) {
+		usb_stor_dbg(us, "INQUIRY - Returning bogus response\n");
+		memcpy(ptr, inquiry_reply, sizeof(inquiry_reply));
+		fill_inquiry_response(us, ptr, 36);
+		return USB_STOR_TRANSPORT_GOOD;
+	}
+
+	if (srb->cmnd[0] == READ_CAPACITY) {
+		info->ssize = 0x200;  // hard coded 512 byte sectors as per ATA spec
+		rc = datafab_id_device(us, info);
+		if (rc != USB_STOR_TRANSPORT_GOOD)
+			return rc;
+
+		usb_stor_dbg(us, "READ_CAPACITY:  %ld sectors, %ld bytes per sector\n",
+			     info->sectors, info->ssize);
+
+		// build the reply
+		// we need the last sector, not the number of sectors
+		((__be32 *) ptr)[0] = cpu_to_be32(info->sectors - 1);
+		((__be32 *) ptr)[1] = cpu_to_be32(info->ssize);
+		usb_stor_set_xfer_buf(ptr, 8, srb);
+
+		return USB_STOR_TRANSPORT_GOOD;
+	}
+
+	if (srb->cmnd[0] == MODE_SELECT_10) {
+		usb_stor_dbg(us, "Gah! MODE_SELECT_10\n");
+		return USB_STOR_TRANSPORT_ERROR;
+	}
+
+	// don't bother implementing READ_6 or WRITE_6.
+	//
+	if (srb->cmnd[0] == READ_10) {
+		block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
+			((u32)(srb->cmnd[4]) <<  8) | ((u32)(srb->cmnd[5]));
+
+		blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8]));
+
+		usb_stor_dbg(us, "READ_10: read block 0x%04lx  count %ld\n",
+			     block, blocks);
+		return datafab_read_data(us, info, block, blocks);
+	}
+
+	if (srb->cmnd[0] == READ_12) {
+		// we'll probably never see a READ_12 but we'll do it anyway...
+		//
+		block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
+			((u32)(srb->cmnd[4]) <<  8) | ((u32)(srb->cmnd[5]));
+
+		blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) |
+			 ((u32)(srb->cmnd[8]) <<  8) | ((u32)(srb->cmnd[9]));
+
+		usb_stor_dbg(us, "READ_12: read block 0x%04lx  count %ld\n",
+			     block, blocks);
+		return datafab_read_data(us, info, block, blocks);
+	}
+
+	if (srb->cmnd[0] == WRITE_10) {
+		block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
+			((u32)(srb->cmnd[4]) <<  8) | ((u32)(srb->cmnd[5]));
+
+		blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8]));
+
+		usb_stor_dbg(us, "WRITE_10: write block 0x%04lx count %ld\n",
+			     block, blocks);
+		return datafab_write_data(us, info, block, blocks);
+	}
+
+	if (srb->cmnd[0] == WRITE_12) {
+		// we'll probably never see a WRITE_12 but we'll do it anyway...
+		//
+		block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
+			((u32)(srb->cmnd[4]) <<  8) | ((u32)(srb->cmnd[5]));
+
+		blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) |
+			 ((u32)(srb->cmnd[8]) <<  8) | ((u32)(srb->cmnd[9]));
+
+		usb_stor_dbg(us, "WRITE_12: write block 0x%04lx count %ld\n",
+			     block, blocks);
+		return datafab_write_data(us, info, block, blocks);
+	}
+
+	if (srb->cmnd[0] == TEST_UNIT_READY) {
+		usb_stor_dbg(us, "TEST_UNIT_READY\n");
+		return datafab_id_device(us, info);
+	}
+
+	if (srb->cmnd[0] == REQUEST_SENSE) {
+		usb_stor_dbg(us, "REQUEST_SENSE - Returning faked response\n");
+
+		// this response is pretty bogus right now.  eventually if necessary
+		// we can set the correct sense data.  so far though it hasn't been
+		// necessary
+		//
+		memset(ptr, 0, 18);
+		ptr[0] = 0xF0;
+		ptr[2] = info->sense_key;
+		ptr[7] = 11;
+		ptr[12] = info->sense_asc;
+		ptr[13] = info->sense_ascq;
+		usb_stor_set_xfer_buf(ptr, 18, srb);
+
+		return USB_STOR_TRANSPORT_GOOD;
+	}
+
+	if (srb->cmnd[0] == MODE_SENSE) {
+		usb_stor_dbg(us, "MODE_SENSE_6 detected\n");
+		return datafab_handle_mode_sense(us, srb, 1);
+	}
+
+	if (srb->cmnd[0] == MODE_SENSE_10) {
+		usb_stor_dbg(us, "MODE_SENSE_10 detected\n");
+		return datafab_handle_mode_sense(us, srb, 0);
+	}
+
+	if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) {
+		/*
+		 * sure.  whatever.  not like we can stop the user from
+		 * popping the media out of the device (no locking doors, etc)
+		 */
+		return USB_STOR_TRANSPORT_GOOD;
+	}
+
+	if (srb->cmnd[0] == START_STOP) {
+		/*
+		 * this is used by sd.c'check_scsidisk_media_change to detect
+		 * media change
+		 */
+		usb_stor_dbg(us, "START_STOP\n");
+		/*
+		 * the first datafab_id_device after a media change returns
+		 * an error (determined experimentally)
+		 */
+		rc = datafab_id_device(us, info);
+		if (rc == USB_STOR_TRANSPORT_GOOD) {
+			info->sense_key = NO_SENSE;
+			srb->result = SUCCESS;
+		} else {
+			info->sense_key = UNIT_ATTENTION;
+			srb->result = SAM_STAT_CHECK_CONDITION;
+		}
+		return rc;
+	}
+
+	usb_stor_dbg(us, "Gah! Unknown command: %d (0x%x)\n",
+		     srb->cmnd[0], srb->cmnd[0]);
+	info->sense_key = 0x05;
+	info->sense_asc = 0x20;
+	info->sense_ascq = 0x00;
+	return USB_STOR_TRANSPORT_FAILED;
+}
+
+static struct scsi_host_template datafab_host_template;
+
+static int datafab_probe(struct usb_interface *intf,
+			 const struct usb_device_id *id)
+{
+	struct us_data *us;
+	int result;
+
+	result = usb_stor_probe1(&us, intf, id,
+			(id - datafab_usb_ids) + datafab_unusual_dev_list,
+			&datafab_host_template);
+	if (result)
+		return result;
+
+	us->transport_name  = "Datafab Bulk-Only";
+	us->transport = datafab_transport;
+	us->transport_reset = usb_stor_Bulk_reset;
+	us->max_lun = 1;
+
+	result = usb_stor_probe2(us);
+	return result;
+}
+
+static struct usb_driver datafab_driver = {
+	.name =		DRV_NAME,
+	.probe =	datafab_probe,
+	.disconnect =	usb_stor_disconnect,
+	.suspend =	usb_stor_suspend,
+	.resume =	usb_stor_resume,
+	.reset_resume =	usb_stor_reset_resume,
+	.pre_reset =	usb_stor_pre_reset,
+	.post_reset =	usb_stor_post_reset,
+	.id_table =	datafab_usb_ids,
+	.soft_unbind =	1,
+	.no_dynamic_id = 1,
+};
+
+module_usb_stor_driver(datafab_driver, datafab_host_template, DRV_NAME);