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, 594 insertions, 0 deletions

diff --git a/drivers/scsi/sr_ioctl.c b/drivers/scsi/sr_ioctl.c
new file mode 100644
index 000000000..fbdb5124d
--- /dev/null
+++ b/drivers/scsi/sr_ioctl.c
@@ -0,0 +1,594 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/fs.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/blkdev.h>
+#include <linux/module.h>
+#include <linux/blkpg.h>
+#include <linux/cdrom.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <asm/io.h>
+#include <linux/uaccess.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_dbg.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_eh.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_ioctl.h>
+#include <scsi/scsi_cmnd.h>
+
+#include "sr.h"
+
+#if 0
+#define DEBUG
+#endif
+
+/* The sr_is_xa() seems to trigger firmware bugs with some drives :-(
+ * It is off by default and can be turned on with this module parameter */
+static int xa_test = 0;
+
+module_param(xa_test, int, S_IRUGO | S_IWUSR);
+
+static int sr_read_tochdr(struct cdrom_device_info *cdi,
+		struct cdrom_tochdr *tochdr)
+{
+	struct scsi_cd *cd = cdi->handle;
+	struct packet_command cgc;
+	int result;
+	unsigned char *buffer;
+
+	buffer = kzalloc(32, GFP_KERNEL);
+	if (!buffer)
+		return -ENOMEM;
+
+	memset(&cgc, 0, sizeof(struct packet_command));
+	cgc.timeout = IOCTL_TIMEOUT;
+	cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
+	cgc.cmd[8] = 12;		/* LSB of length */
+	cgc.buffer = buffer;
+	cgc.buflen = 12;
+	cgc.quiet = 1;
+	cgc.data_direction = DMA_FROM_DEVICE;
+
+	result = sr_do_ioctl(cd, &cgc);
+	if (result)
+		goto err;
+
+	tochdr->cdth_trk0 = buffer[2];
+	tochdr->cdth_trk1 = buffer[3];
+
+err:
+	kfree(buffer);
+	return result;
+}
+
+static int sr_read_tocentry(struct cdrom_device_info *cdi,
+		struct cdrom_tocentry *tocentry)
+{
+	struct scsi_cd *cd = cdi->handle;
+	struct packet_command cgc;
+	int result;
+	unsigned char *buffer;
+
+	buffer = kzalloc(32, GFP_KERNEL);
+	if (!buffer)
+		return -ENOMEM;
+
+	memset(&cgc, 0, sizeof(struct packet_command));
+	cgc.timeout = IOCTL_TIMEOUT;
+	cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
+	cgc.cmd[1] |= (tocentry->cdte_format == CDROM_MSF) ? 0x02 : 0;
+	cgc.cmd[6] = tocentry->cdte_track;
+	cgc.cmd[8] = 12;		/* LSB of length */
+	cgc.buffer = buffer;
+	cgc.buflen = 12;
+	cgc.data_direction = DMA_FROM_DEVICE;
+
+	result = sr_do_ioctl(cd, &cgc);
+	if (result)
+		goto err;
+
+	tocentry->cdte_ctrl = buffer[5] & 0xf;
+	tocentry->cdte_adr = buffer[5] >> 4;
+	tocentry->cdte_datamode = (tocentry->cdte_ctrl & 0x04) ? 1 : 0;
+	if (tocentry->cdte_format == CDROM_MSF) {
+		tocentry->cdte_addr.msf.minute = buffer[9];
+		tocentry->cdte_addr.msf.second = buffer[10];
+		tocentry->cdte_addr.msf.frame = buffer[11];
+	} else
+		tocentry->cdte_addr.lba = (((((buffer[8] << 8) + buffer[9]) << 8)
+			+ buffer[10]) << 8) + buffer[11];
+
+err:
+	kfree(buffer);
+	return result;
+}
+
+#define IOCTL_RETRIES 3
+
+/* ATAPI drives don't have a SCMD_PLAYAUDIO_TI command.  When these drives
+   are emulating a SCSI device via the idescsi module, they need to have
+   CDROMPLAYTRKIND commands translated into CDROMPLAYMSF commands for them */
+
+static int sr_fake_playtrkind(struct cdrom_device_info *cdi, struct cdrom_ti *ti)
+{
+	struct cdrom_tocentry trk0_te, trk1_te;
+	struct cdrom_tochdr tochdr;
+	struct packet_command cgc;
+	int ntracks, ret;
+
+	ret = sr_read_tochdr(cdi, &tochdr);
+	if (ret)
+		return ret;
+
+	ntracks = tochdr.cdth_trk1 - tochdr.cdth_trk0 + 1;
+	
+	if (ti->cdti_trk1 == ntracks) 
+		ti->cdti_trk1 = CDROM_LEADOUT;
+	else if (ti->cdti_trk1 != CDROM_LEADOUT)
+		ti->cdti_trk1 ++;
+
+	trk0_te.cdte_track = ti->cdti_trk0;
+	trk0_te.cdte_format = CDROM_MSF;
+	trk1_te.cdte_track = ti->cdti_trk1;
+	trk1_te.cdte_format = CDROM_MSF;
+	
+	ret = sr_read_tocentry(cdi, &trk0_te);
+	if (ret)
+		return ret;
+	ret = sr_read_tocentry(cdi, &trk1_te);
+	if (ret)
+		return ret;
+
+	memset(&cgc, 0, sizeof(struct packet_command));
+	cgc.cmd[0] = GPCMD_PLAY_AUDIO_MSF;
+	cgc.cmd[3] = trk0_te.cdte_addr.msf.minute;
+	cgc.cmd[4] = trk0_te.cdte_addr.msf.second;
+	cgc.cmd[5] = trk0_te.cdte_addr.msf.frame;
+	cgc.cmd[6] = trk1_te.cdte_addr.msf.minute;
+	cgc.cmd[7] = trk1_te.cdte_addr.msf.second;
+	cgc.cmd[8] = trk1_te.cdte_addr.msf.frame;
+	cgc.data_direction = DMA_NONE;
+	cgc.timeout = IOCTL_TIMEOUT;
+	return sr_do_ioctl(cdi->handle, &cgc);
+}
+
+static int sr_play_trkind(struct cdrom_device_info *cdi,
+		struct cdrom_ti *ti)
+
+{
+	struct scsi_cd *cd = cdi->handle;
+	struct packet_command cgc;
+	int result;
+
+	memset(&cgc, 0, sizeof(struct packet_command));
+	cgc.timeout = IOCTL_TIMEOUT;
+	cgc.cmd[0] = GPCMD_PLAYAUDIO_TI;
+	cgc.cmd[4] = ti->cdti_trk0;
+	cgc.cmd[5] = ti->cdti_ind0;
+	cgc.cmd[7] = ti->cdti_trk1;
+	cgc.cmd[8] = ti->cdti_ind1;
+	cgc.data_direction = DMA_NONE;
+
+	result = sr_do_ioctl(cd, &cgc);
+	if (result == -EDRIVE_CANT_DO_THIS)
+		result = sr_fake_playtrkind(cdi, ti);
+
+	return result;
+}
+
+/* We do our own retries because we want to know what the specific
+   error code is.  Normally the UNIT_ATTENTION code will automatically
+   clear after one error */
+
+int sr_do_ioctl(Scsi_CD *cd, struct packet_command *cgc)
+{
+	struct scsi_device *SDev;
+	struct scsi_sense_hdr local_sshdr, *sshdr = &local_sshdr;
+	int result, err = 0, retries = 0;
+
+	SDev = cd->device;
+
+	if (cgc->sshdr)
+		sshdr = cgc->sshdr;
+
+      retry:
+	if (!scsi_block_when_processing_errors(SDev)) {
+		err = -ENODEV;
+		goto out;
+	}
+
+	result = scsi_execute(SDev, cgc->cmd, cgc->data_direction,
+			      cgc->buffer, cgc->buflen, NULL, sshdr,
+			      cgc->timeout, IOCTL_RETRIES, 0, 0, NULL);
+
+	/* Minimal error checking.  Ignore cases we know about, and report the rest. */
+	if (result < 0) {
+		err = result;
+		goto out;
+	}
+	if (scsi_status_is_check_condition(result)) {
+		switch (sshdr->sense_key) {
+		case UNIT_ATTENTION:
+			SDev->changed = 1;
+			if (!cgc->quiet)
+				sr_printk(KERN_INFO, cd,
+					  "disc change detected.\n");
+			if (retries++ < 10)
+				goto retry;
+			err = -ENOMEDIUM;
+			break;
+		case NOT_READY:	/* This happens if there is no disc in drive */
+			if (sshdr->asc == 0x04 &&
+			    sshdr->ascq == 0x01) {
+				/* sense: Logical unit is in process of becoming ready */
+				if (!cgc->quiet)
+					sr_printk(KERN_INFO, cd,
+						  "CDROM not ready yet.\n");
+				if (retries++ < 10) {
+					/* sleep 2 sec and try again */
+					ssleep(2);
+					goto retry;
+				} else {
+					/* 20 secs are enough? */
+					err = -ENOMEDIUM;
+					break;
+				}
+			}
+			if (!cgc->quiet)
+				sr_printk(KERN_INFO, cd,
+					  "CDROM not ready.  Make sure there "
+					  "is a disc in the drive.\n");
+			err = -ENOMEDIUM;
+			break;
+		case ILLEGAL_REQUEST:
+			err = -EIO;
+			if (sshdr->asc == 0x20 &&
+			    sshdr->ascq == 0x00)
+				/* sense: Invalid command operation code */
+				err = -EDRIVE_CANT_DO_THIS;
+			break;
+		default:
+			err = -EIO;
+		}
+	}
+
+	/* Wake up a process waiting for device */
+      out:
+	cgc->stat = err;
+	return err;
+}
+
+/* ---------------------------------------------------------------------- */
+/* interface to cdrom.c                                                   */
+
+int sr_tray_move(struct cdrom_device_info *cdi, int pos)
+{
+	Scsi_CD *cd = cdi->handle;
+	struct packet_command cgc;
+
+	memset(&cgc, 0, sizeof(struct packet_command));
+	cgc.cmd[0] = GPCMD_START_STOP_UNIT;
+	cgc.cmd[4] = (pos == 0) ? 0x03 /* close */ : 0x02 /* eject */ ;
+	cgc.data_direction = DMA_NONE;
+	cgc.timeout = IOCTL_TIMEOUT;
+	return sr_do_ioctl(cd, &cgc);
+}
+
+int sr_lock_door(struct cdrom_device_info *cdi, int lock)
+{
+	Scsi_CD *cd = cdi->handle;
+
+	return scsi_set_medium_removal(cd->device, lock ?
+		       SCSI_REMOVAL_PREVENT : SCSI_REMOVAL_ALLOW);
+}
+
+int sr_drive_status(struct cdrom_device_info *cdi, int slot)
+{
+	struct scsi_cd *cd = cdi->handle;
+	struct scsi_sense_hdr sshdr;
+	struct media_event_desc med;
+
+	if (CDSL_CURRENT != slot) {
+		/* we have no changer support */
+		return -EINVAL;
+	}
+	if (!scsi_test_unit_ready(cd->device, SR_TIMEOUT, MAX_RETRIES, &sshdr))
+		return CDS_DISC_OK;
+
+	/* SK/ASC/ASCQ of 2/4/1 means "unit is becoming ready" */
+	if (scsi_sense_valid(&sshdr) && sshdr.sense_key == NOT_READY
+			&& sshdr.asc == 0x04 && sshdr.ascq == 0x01)
+		return CDS_DRIVE_NOT_READY;
+
+	if (!cdrom_get_media_event(cdi, &med)) {
+		if (med.media_present)
+			return CDS_DISC_OK;
+		else if (med.door_open)
+			return CDS_TRAY_OPEN;
+		else
+			return CDS_NO_DISC;
+	}
+
+	/*
+	 * SK/ASC/ASCQ of 2/4/2 means "initialization required"
+	 * Using CD_TRAY_OPEN results in an START_STOP_UNIT to close
+	 * the tray, which resolves the initialization requirement.
+	 */
+	if (scsi_sense_valid(&sshdr) && sshdr.sense_key == NOT_READY
+			&& sshdr.asc == 0x04 && sshdr.ascq == 0x02)
+		return CDS_TRAY_OPEN;
+
+	/*
+	 * 0x04 is format in progress .. but there must be a disc present!
+	 */
+	if (sshdr.sense_key == NOT_READY && sshdr.asc == 0x04)
+		return CDS_DISC_OK;
+
+	/*
+	 * If not using Mt Fuji extended media tray reports,
+	 * just return TRAY_OPEN since ATAPI doesn't provide
+	 * any other way to detect this...
+	 */
+	if (scsi_sense_valid(&sshdr) &&
+	    /* 0x3a is medium not present */
+	    sshdr.asc == 0x3a)
+		return CDS_NO_DISC;
+	else
+		return CDS_TRAY_OPEN;
+
+	return CDS_DRIVE_NOT_READY;
+}
+
+int sr_disk_status(struct cdrom_device_info *cdi)
+{
+	Scsi_CD *cd = cdi->handle;
+	struct cdrom_tochdr toc_h;
+	struct cdrom_tocentry toc_e;
+	int i, rc, have_datatracks = 0;
+
+	/* look for data tracks */
+	rc = sr_read_tochdr(cdi, &toc_h);
+	if (rc)
+		return (rc == -ENOMEDIUM) ? CDS_NO_DISC : CDS_NO_INFO;
+
+	for (i = toc_h.cdth_trk0; i <= toc_h.cdth_trk1; i++) {
+		toc_e.cdte_track = i;
+		toc_e.cdte_format = CDROM_LBA;
+		if (sr_read_tocentry(cdi, &toc_e))
+			return CDS_NO_INFO;
+		if (toc_e.cdte_ctrl & CDROM_DATA_TRACK) {
+			have_datatracks = 1;
+			break;
+		}
+	}
+	if (!have_datatracks)
+		return CDS_AUDIO;
+
+	if (cd->xa_flag)
+		return CDS_XA_2_1;
+	else
+		return CDS_DATA_1;
+}
+
+int sr_get_last_session(struct cdrom_device_info *cdi,
+			struct cdrom_multisession *ms_info)
+{
+	Scsi_CD *cd = cdi->handle;
+
+	ms_info->addr.lba = cd->ms_offset;
+	ms_info->xa_flag = cd->xa_flag || cd->ms_offset > 0;
+
+	return 0;
+}
+
+int sr_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn)
+{
+	Scsi_CD *cd = cdi->handle;
+	struct packet_command cgc;
+	char *buffer = kzalloc(32, GFP_KERNEL);
+	int result;
+
+	if (!buffer)
+		return -ENOMEM;
+
+	memset(&cgc, 0, sizeof(struct packet_command));
+	cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
+	cgc.cmd[2] = 0x40;	/* I do want the subchannel info */
+	cgc.cmd[3] = 0x02;	/* Give me medium catalog number info */
+	cgc.cmd[8] = 24;
+	cgc.buffer = buffer;
+	cgc.buflen = 24;
+	cgc.data_direction = DMA_FROM_DEVICE;
+	cgc.timeout = IOCTL_TIMEOUT;
+	result = sr_do_ioctl(cd, &cgc);
+	if (result)
+		goto err;
+
+	memcpy(mcn->medium_catalog_number, buffer + 9, 13);
+	mcn->medium_catalog_number[13] = 0;
+
+err:
+	kfree(buffer);
+	return result;
+}
+
+int sr_reset(struct cdrom_device_info *cdi)
+{
+	return 0;
+}
+
+int sr_select_speed(struct cdrom_device_info *cdi, int speed)
+{
+	Scsi_CD *cd = cdi->handle;
+	struct packet_command cgc;
+
+	if (speed == 0)
+		speed = 0xffff;	/* set to max */
+	else
+		speed *= 177;	/* Nx to kbyte/s */
+
+	memset(&cgc, 0, sizeof(struct packet_command));
+	cgc.cmd[0] = GPCMD_SET_SPEED;	/* SET CD SPEED */
+	cgc.cmd[2] = (speed >> 8) & 0xff;	/* MSB for speed (in kbytes/sec) */
+	cgc.cmd[3] = speed & 0xff;	/* LSB */
+	cgc.data_direction = DMA_NONE;
+	cgc.timeout = IOCTL_TIMEOUT;
+
+	if (sr_do_ioctl(cd, &cgc))
+		return -EIO;
+	return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+/* this is called by the generic cdrom driver. arg is a _kernel_ pointer,  */
+/* because the generic cdrom driver does the user access stuff for us.     */
+/* only cdromreadtochdr and cdromreadtocentry are left - for use with the  */
+/* sr_disk_status interface for the generic cdrom driver.                  */
+
+int sr_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, void *arg)
+{
+	switch (cmd) {
+	case CDROMREADTOCHDR:
+		return sr_read_tochdr(cdi, arg);
+	case CDROMREADTOCENTRY:
+		return sr_read_tocentry(cdi, arg);
+	case CDROMPLAYTRKIND:
+		return sr_play_trkind(cdi, arg);
+	default:
+		return -EINVAL;
+	}
+}
+
+/* -----------------------------------------------------------------------
+ * a function to read all sorts of funny cdrom sectors using the READ_CD
+ * scsi-3 mmc command
+ *
+ * lba:     linear block address
+ * format:  0 = data (anything)
+ *          1 = audio
+ *          2 = data (mode 1)
+ *          3 = data (mode 2)
+ *          4 = data (mode 2 form1)
+ *          5 = data (mode 2 form2)
+ * blksize: 2048 | 2336 | 2340 | 2352
+ */
+
+static int sr_read_cd(Scsi_CD *cd, unsigned char *dest, int lba, int format, int blksize)
+{
+	struct packet_command cgc;
+
+#ifdef DEBUG
+	sr_printk(KERN_INFO, cd, "sr_read_cd lba=%d format=%d blksize=%d\n",
+		  lba, format, blksize);
+#endif
+
+	memset(&cgc, 0, sizeof(struct packet_command));
+	cgc.cmd[0] = GPCMD_READ_CD;	/* READ_CD */
+	cgc.cmd[1] = ((format & 7) << 2);
+	cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff;
+	cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff;
+	cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff;
+	cgc.cmd[5] = (unsigned char) lba & 0xff;
+	cgc.cmd[8] = 1;
+	switch (blksize) {
+	case 2336:
+		cgc.cmd[9] = 0x58;
+		break;
+	case 2340:
+		cgc.cmd[9] = 0x78;
+		break;
+	case 2352:
+		cgc.cmd[9] = 0xf8;
+		break;
+	default:
+		cgc.cmd[9] = 0x10;
+		break;
+	}
+	cgc.buffer = dest;
+	cgc.buflen = blksize;
+	cgc.data_direction = DMA_FROM_DEVICE;
+	cgc.timeout = IOCTL_TIMEOUT;
+	return sr_do_ioctl(cd, &cgc);
+}
+
+/*
+ * read sectors with blocksizes other than 2048
+ */
+
+static int sr_read_sector(Scsi_CD *cd, int lba, int blksize, unsigned char *dest)
+{
+	struct packet_command cgc;
+	int rc;
+
+	/* we try the READ CD command first... */
+	if (cd->readcd_known) {
+		rc = sr_read_cd(cd, dest, lba, 0, blksize);
+		if (-EDRIVE_CANT_DO_THIS != rc)
+			return rc;
+		cd->readcd_known = 0;
+		sr_printk(KERN_INFO, cd,
+			  "CDROM doesn't support READ CD (0xbe) command\n");
+		/* fall & retry the other way */
+	}
+	/* ... if this fails, we switch the blocksize using MODE SELECT */
+	if (blksize != cd->device->sector_size) {
+		if (0 != (rc = sr_set_blocklength(cd, blksize)))
+			return rc;
+	}
+#ifdef DEBUG
+	sr_printk(KERN_INFO, cd, "sr_read_sector lba=%d blksize=%d\n",
+		  lba, blksize);
+#endif
+
+	memset(&cgc, 0, sizeof(struct packet_command));
+	cgc.cmd[0] = GPCMD_READ_10;
+	cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff;
+	cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff;
+	cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff;
+	cgc.cmd[5] = (unsigned char) lba & 0xff;
+	cgc.cmd[8] = 1;
+	cgc.buffer = dest;
+	cgc.buflen = blksize;
+	cgc.data_direction = DMA_FROM_DEVICE;
+	cgc.timeout = IOCTL_TIMEOUT;
+	rc = sr_do_ioctl(cd, &cgc);
+
+	if (blksize != CD_FRAMESIZE)
+		rc |= sr_set_blocklength(cd, CD_FRAMESIZE);
+	return rc;
+}
+
+/*
+ * read a sector in raw mode to check the sector format
+ * ret: 1 == mode2 (XA), 0 == mode1, <0 == error 
+ */
+
+int sr_is_xa(Scsi_CD *cd)
+{
+	unsigned char *raw_sector;
+	int is_xa;
+
+	if (!xa_test)
+		return 0;
+
+	raw_sector = kmalloc(2048, GFP_KERNEL);
+	if (!raw_sector)
+		return -ENOMEM;
+	if (0 == sr_read_sector(cd, cd->ms_offset + 16,
+				CD_FRAMESIZE_RAW1, raw_sector)) {
+		is_xa = (raw_sector[3] == 0x02) ? 1 : 0;
+	} else {
+		/* read a raw sector failed for some reason. */
+		is_xa = -1;
+	}
+	kfree(raw_sector);
+#ifdef DEBUG
+	sr_printk(KERN_INFO, cd, "sr_is_xa: %d\n", is_xa);
+#endif
+	return is_xa;
+}