path: root/sys/cam/ctl/ctl.c

/*-
 * Copyright (c) 2003-2009 Silicon Graphics International Corp.
 * Copyright (c) 2012 The FreeBSD Foundation
 * All rights reserved.
 *
 * Portions of this software were developed by Edward Tomasz Napierala
 * under sponsorship from the FreeBSD Foundation.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 *
 * $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/ctl.c#8 $
 */
/*
 * CAM Target Layer, a SCSI device emulation subsystem.
 *
 * Author: Ken Merry <ken@FreeBSD.org>
 */

#define _CTL_C

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/types.h>
#include <sys/kthread.h>
#include <sys/bio.h>
#include <sys/fcntl.h>
#include <sys/lock.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/condvar.h>
#include <sys/malloc.h>
#include <sys/conf.h>
#include <sys/ioccom.h>
#include <sys/queue.h>
#include <sys/sbuf.h>
#include <sys/smp.h>
#include <sys/endian.h>
#include <sys/sysctl.h>

#include <cam/cam.h>
#include <cam/scsi/scsi_all.h>
#include <cam/scsi/scsi_da.h>
#include <cam/ctl/ctl_io.h>
#include <cam/ctl/ctl.h>
#include <cam/ctl/ctl_frontend.h>
#include <cam/ctl/ctl_frontend_internal.h>
#include <cam/ctl/ctl_util.h>
#include <cam/ctl/ctl_backend.h>
#include <cam/ctl/ctl_ioctl.h>
#include <cam/ctl/ctl_ha.h>
#include <cam/ctl/ctl_private.h>
#include <cam/ctl/ctl_debug.h>
#include <cam/ctl/ctl_scsi_all.h>
#include <cam/ctl/ctl_error.h>

struct ctl_softc *control_softc = NULL;

/*
 * Size and alignment macros needed for Copan-specific HA hardware.  These
 * can go away when the HA code is re-written, and uses busdma for any
 * hardware.
 */
#define	CTL_ALIGN_8B(target, source, type)				\
	if (((uint32_t)source & 0x7) != 0)				\
		target = (type)(source + (0x8 - ((uint32_t)source & 0x7)));\
	else								\
		target = (type)source;

#define	CTL_SIZE_8B(target, size)					\
	if ((size & 0x7) != 0)						\
		target = size + (0x8 - (size & 0x7));			\
	else								\
		target = size;

#define CTL_ALIGN_8B_MARGIN	16

/*
 * Template mode pages.
 */

/*
 * Note that these are default values only.  The actual values will be
 * filled in when the user does a mode sense.
 */
static struct copan_power_subpage power_page_default = {
	/*page_code*/ PWR_PAGE_CODE | SMPH_SPF,
	/*subpage*/ PWR_SUBPAGE_CODE,
	/*page_length*/ {(sizeof(struct copan_power_subpage) - 4) & 0xff00,
			 (sizeof(struct copan_power_subpage) - 4) & 0x00ff},
	/*page_version*/ PWR_VERSION,
	/* total_luns */ 26,
	/* max_active_luns*/ PWR_DFLT_MAX_LUNS,
	/*reserved*/ {0, 0, 0, 0, 0, 0, 0, 0, 0,
		      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
		      0, 0, 0, 0, 0, 0}
};

static struct copan_power_subpage power_page_changeable = {
	/*page_code*/ PWR_PAGE_CODE | SMPH_SPF,
	/*subpage*/ PWR_SUBPAGE_CODE,
	/*page_length*/ {(sizeof(struct copan_power_subpage) - 4) & 0xff00,
			 (sizeof(struct copan_power_subpage) - 4) & 0x00ff},
	/*page_version*/ 0,
	/* total_luns */ 0,
	/* max_active_luns*/ 0,
	/*reserved*/ {0, 0, 0, 0, 0, 0, 0, 0, 0,
		      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
		      0, 0, 0, 0, 0, 0}
};

static struct copan_aps_subpage aps_page_default = {
	APS_PAGE_CODE | SMPH_SPF, //page_code
	APS_SUBPAGE_CODE, //subpage
	{(sizeof(struct copan_aps_subpage) - 4) & 0xff00,
	 (sizeof(struct copan_aps_subpage) - 4) & 0x00ff}, //page_length
	APS_VERSION, //page_version
	0, //lock_active
	{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0} //reserved
};

static struct copan_aps_subpage aps_page_changeable = {
	APS_PAGE_CODE | SMPH_SPF, //page_code
	APS_SUBPAGE_CODE, //subpage
	{(sizeof(struct copan_aps_subpage) - 4) & 0xff00,
	 (sizeof(struct copan_aps_subpage) - 4) & 0x00ff}, //page_length
	0, //page_version
	0, //lock_active
	{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0} //reserved
};

static struct copan_debugconf_subpage debugconf_page_default = {
	DBGCNF_PAGE_CODE | SMPH_SPF,	/* page_code */
	DBGCNF_SUBPAGE_CODE,		/* subpage */
	{(sizeof(struct copan_debugconf_subpage) - 4) >> 8,
	 (sizeof(struct copan_debugconf_subpage) - 4) >> 0}, /* page_length */
	DBGCNF_VERSION,			/* page_version */
	{CTL_TIME_IO_DEFAULT_SECS>>8,
	 CTL_TIME_IO_DEFAULT_SECS>>0},	/* ctl_time_io_secs */
};

static struct copan_debugconf_subpage debugconf_page_changeable = {
	DBGCNF_PAGE_CODE | SMPH_SPF,	/* page_code */
	DBGCNF_SUBPAGE_CODE,		/* subpage */
	{(sizeof(struct copan_debugconf_subpage) - 4) >> 8,
	 (sizeof(struct copan_debugconf_subpage) - 4) >> 0}, /* page_length */
	0,				/* page_version */
	{0xff,0xff},			/* ctl_time_io_secs */
};

static struct scsi_format_page format_page_default = {
	/*page_code*/SMS_FORMAT_DEVICE_PAGE,
	/*page_length*/sizeof(struct scsi_format_page) - 2,
	/*tracks_per_zone*/ {0, 0},
	/*alt_sectors_per_zone*/ {0, 0},
	/*alt_tracks_per_zone*/ {0, 0},
	/*alt_tracks_per_lun*/ {0, 0},
	/*sectors_per_track*/ {(CTL_DEFAULT_SECTORS_PER_TRACK >> 8) & 0xff,
			        CTL_DEFAULT_SECTORS_PER_TRACK & 0xff},
	/*bytes_per_sector*/ {0, 0},
	/*interleave*/ {0, 0},
	/*track_skew*/ {0, 0},
	/*cylinder_skew*/ {0, 0},
	/*flags*/ SFP_HSEC,
	/*reserved*/ {0, 0, 0}
};

static struct scsi_format_page format_page_changeable = {
	/*page_code*/SMS_FORMAT_DEVICE_PAGE,
	/*page_length*/sizeof(struct scsi_format_page) - 2,
	/*tracks_per_zone*/ {0, 0},
	/*alt_sectors_per_zone*/ {0, 0},
	/*alt_tracks_per_zone*/ {0, 0},
	/*alt_tracks_per_lun*/ {0, 0},
	/*sectors_per_track*/ {0, 0},
	/*bytes_per_sector*/ {0, 0},
	/*interleave*/ {0, 0},
	/*track_skew*/ {0, 0},
	/*cylinder_skew*/ {0, 0},
	/*flags*/ 0,
	/*reserved*/ {0, 0, 0}
};

static struct scsi_rigid_disk_page rigid_disk_page_default = {
	/*page_code*/SMS_RIGID_DISK_PAGE,
	/*page_length*/sizeof(struct scsi_rigid_disk_page) - 2,
	/*cylinders*/ {0, 0, 0},
	/*heads*/ CTL_DEFAULT_HEADS,
	/*start_write_precomp*/ {0, 0, 0},
	/*start_reduced_current*/ {0, 0, 0},
	/*step_rate*/ {0, 0},
	/*landing_zone_cylinder*/ {0, 0, 0},
	/*rpl*/ SRDP_RPL_DISABLED,
	/*rotational_offset*/ 0,
	/*reserved1*/ 0,
	/*rotation_rate*/ {(CTL_DEFAULT_ROTATION_RATE >> 8) & 0xff,
			   CTL_DEFAULT_ROTATION_RATE & 0xff},
	/*reserved2*/ {0, 0}
};

static struct scsi_rigid_disk_page rigid_disk_page_changeable = {
	/*page_code*/SMS_RIGID_DISK_PAGE,
	/*page_length*/sizeof(struct scsi_rigid_disk_page) - 2,
	/*cylinders*/ {0, 0, 0},
	/*heads*/ 0,
	/*start_write_precomp*/ {0, 0, 0},
	/*start_reduced_current*/ {0, 0, 0},
	/*step_rate*/ {0, 0},
	/*landing_zone_cylinder*/ {0, 0, 0},
	/*rpl*/ 0,
	/*rotational_offset*/ 0,
	/*reserved1*/ 0,
	/*rotation_rate*/ {0, 0},
	/*reserved2*/ {0, 0}
};

static struct scsi_caching_page caching_page_default = {
	/*page_code*/SMS_CACHING_PAGE,
	/*page_length*/sizeof(struct scsi_caching_page) - 2,
	/*flags1*/ SCP_DISC | SCP_WCE,
	/*ret_priority*/ 0,
	/*disable_pf_transfer_len*/ {0xff, 0xff},
	/*min_prefetch*/ {0, 0},
	/*max_prefetch*/ {0xff, 0xff},
	/*max_pf_ceiling*/ {0xff, 0xff},
	/*flags2*/ 0,
	/*cache_segments*/ 0,
	/*cache_seg_size*/ {0, 0},
	/*reserved*/ 0,
	/*non_cache_seg_size*/ {0, 0, 0}
};

static struct scsi_caching_page caching_page_changeable = {
	/*page_code*/SMS_CACHING_PAGE,
	/*page_length*/sizeof(struct scsi_caching_page) - 2,
	/*flags1*/ SCP_WCE | SCP_RCD,
	/*ret_priority*/ 0,
	/*disable_pf_transfer_len*/ {0, 0},
	/*min_prefetch*/ {0, 0},
	/*max_prefetch*/ {0, 0},
	/*max_pf_ceiling*/ {0, 0},
	/*flags2*/ 0,
	/*cache_segments*/ 0,
	/*cache_seg_size*/ {0, 0},
	/*reserved*/ 0,
	/*non_cache_seg_size*/ {0, 0, 0}
};

static struct scsi_control_page control_page_default = {
	/*page_code*/SMS_CONTROL_MODE_PAGE,
	/*page_length*/sizeof(struct scsi_control_page) - 2,
	/*rlec*/0,
	/*queue_flags*/SCP_QUEUE_ALG_RESTRICTED,
	/*eca_and_aen*/0,
	/*flags4*/SCP_TAS,
	/*aen_holdoff_period*/{0, 0},
	/*busy_timeout_period*/{0, 0},
	/*extended_selftest_completion_time*/{0, 0}
};

static struct scsi_control_page control_page_changeable = {
	/*page_code*/SMS_CONTROL_MODE_PAGE,
	/*page_length*/sizeof(struct scsi_control_page) - 2,
	/*rlec*/SCP_DSENSE,
	/*queue_flags*/SCP_QUEUE_ALG_MASK,
	/*eca_and_aen*/0,
	/*flags4*/0,
	/*aen_holdoff_period*/{0, 0},
	/*busy_timeout_period*/{0, 0},
	/*extended_selftest_completion_time*/{0, 0}
};


/*
 * XXX KDM move these into the softc.
 */
static int rcv_sync_msg;
static int persis_offset;
static uint8_t ctl_pause_rtr;
static int     ctl_is_single = 1;
static int     index_to_aps_page;

SYSCTL_NODE(_kern_cam, OID_AUTO, ctl, CTLFLAG_RD, 0, "CAM Target Layer");
static int worker_threads = -1;
SYSCTL_INT(_kern_cam_ctl, OID_AUTO, worker_threads, CTLFLAG_RDTUN,
    &worker_threads, 1, "Number of worker threads");
static int verbose = 0;
SYSCTL_INT(_kern_cam_ctl, OID_AUTO, verbose, CTLFLAG_RWTUN,
    &verbose, 0, "Show SCSI errors returned to initiator");

/*
 * Supported pages (0x00), Serial number (0x80), Device ID (0x83),
 * Extended INQUIRY Data (0x86), Mode Page Policy (0x87),
 * SCSI Ports (0x88), Third-party Copy (0x8F), Block limits (0xB0),
 * Block Device Characteristics (0xB1) and Logical Block Provisioning (0xB2)
 */
#define SCSI_EVPD_NUM_SUPPORTED_PAGES	10

static void ctl_isc_event_handler(ctl_ha_channel chanel, ctl_ha_event event,
				  int param);
static void ctl_copy_sense_data(union ctl_ha_msg *src, union ctl_io *dest);
static int ctl_init(void);
void ctl_shutdown(void);
static int ctl_open(struct cdev *dev, int flags, int fmt, struct thread *td);
static int ctl_close(struct cdev *dev, int flags, int fmt, struct thread *td);
static void ctl_ioctl_online(void *arg);
static void ctl_ioctl_offline(void *arg);
static int ctl_ioctl_lun_enable(void *arg, struct ctl_id targ_id, int lun_id);
static int ctl_ioctl_lun_disable(void *arg, struct ctl_id targ_id, int lun_id);
static int ctl_ioctl_do_datamove(struct ctl_scsiio *ctsio);
static int ctl_serialize_other_sc_cmd(struct ctl_scsiio *ctsio);
static int ctl_ioctl_submit_wait(union ctl_io *io);
static void ctl_ioctl_datamove(union ctl_io *io);
static void ctl_ioctl_done(union ctl_io *io);
static void ctl_ioctl_hard_startstop_callback(void *arg,
					      struct cfi_metatask *metatask);
static void ctl_ioctl_bbrread_callback(void *arg,struct cfi_metatask *metatask);
static int ctl_ioctl_fill_ooa(struct ctl_lun *lun, uint32_t *cur_fill_num,
			      struct ctl_ooa *ooa_hdr,
			      struct ctl_ooa_entry *kern_entries);
static int ctl_ioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag,
		     struct thread *td);
static uint32_t ctl_map_lun(int port_num, uint32_t lun);
static uint32_t ctl_map_lun_back(int port_num, uint32_t lun);
#ifdef unused
static union ctl_io *ctl_malloc_io(ctl_io_type io_type, uint32_t targ_port,
				   uint32_t targ_target, uint32_t targ_lun,
				   int can_wait);
static void ctl_kfree_io(union ctl_io *io);
#endif /* unused */
static int ctl_alloc_lun(struct ctl_softc *ctl_softc, struct ctl_lun *lun,
			 struct ctl_be_lun *be_lun, struct ctl_id target_id);
static int ctl_free_lun(struct ctl_lun *lun);
static void ctl_create_lun(struct ctl_be_lun *be_lun);
/**
static void ctl_failover_change_pages(struct ctl_softc *softc,
				      struct ctl_scsiio *ctsio, int master);
**/

static int ctl_do_mode_select(union ctl_io *io);
static int ctl_pro_preempt(struct ctl_softc *softc, struct ctl_lun *lun,
			   uint64_t res_key, uint64_t sa_res_key,
			   uint8_t type, uint32_t residx,
			   struct ctl_scsiio *ctsio,
			   struct scsi_per_res_out *cdb,
			   struct scsi_per_res_out_parms* param);
static void ctl_pro_preempt_other(struct ctl_lun *lun,
				  union ctl_ha_msg *msg);
static void ctl_hndl_per_res_out_on_other_sc(union ctl_ha_msg *msg);
static int ctl_inquiry_evpd_supported(struct ctl_scsiio *ctsio, int alloc_len);
static int ctl_inquiry_evpd_serial(struct ctl_scsiio *ctsio, int alloc_len);
static int ctl_inquiry_evpd_devid(struct ctl_scsiio *ctsio, int alloc_len);
static int ctl_inquiry_evpd_eid(struct ctl_scsiio *ctsio, int alloc_len);
static int ctl_inquiry_evpd_mpp(struct ctl_scsiio *ctsio, int alloc_len);
static int ctl_inquiry_evpd_scsi_ports(struct ctl_scsiio *ctsio,
					 int alloc_len);
static int ctl_inquiry_evpd_block_limits(struct ctl_scsiio *ctsio,
					 int alloc_len);
static int ctl_inquiry_evpd_bdc(struct ctl_scsiio *ctsio, int alloc_len);
static int ctl_inquiry_evpd_lbp(struct ctl_scsiio *ctsio, int alloc_len);
static int ctl_inquiry_evpd(struct ctl_scsiio *ctsio);
static int ctl_inquiry_std(struct ctl_scsiio *ctsio);
static int ctl_get_lba_len(union ctl_io *io, uint64_t *lba, uint64_t *len);
static ctl_action ctl_extent_check(union ctl_io *io1, union ctl_io *io2);
static ctl_action ctl_check_for_blockage(struct ctl_lun *lun,
    union ctl_io *pending_io, union ctl_io *ooa_io);
static ctl_action ctl_check_ooa(struct ctl_lun *lun, union ctl_io *pending_io,
				union ctl_io *starting_io);
static int ctl_check_blocked(struct ctl_lun *lun);
static int ctl_scsiio_lun_check(struct ctl_softc *ctl_softc,
				struct ctl_lun *lun,
				const struct ctl_cmd_entry *entry,
				struct ctl_scsiio *ctsio);
//static int ctl_check_rtr(union ctl_io *pending_io, struct ctl_softc *softc);
static void ctl_failover(void);
static int ctl_scsiio_precheck(struct ctl_softc *ctl_softc,
			       struct ctl_scsiio *ctsio);
static int ctl_scsiio(struct ctl_scsiio *ctsio);

static int ctl_bus_reset(struct ctl_softc *ctl_softc, union ctl_io *io);
static int ctl_target_reset(struct ctl_softc *ctl_softc, union ctl_io *io,
			    ctl_ua_type ua_type);
static int ctl_lun_reset(struct ctl_lun *lun, union ctl_io *io,
			 ctl_ua_type ua_type);
static int ctl_abort_task(union ctl_io *io);
static int ctl_abort_task_set(union ctl_io *io);
static int ctl_i_t_nexus_reset(union ctl_io *io);
static void ctl_run_task(union ctl_io *io);
#ifdef CTL_IO_DELAY
static void ctl_datamove_timer_wakeup(void *arg);
static void ctl_done_timer_wakeup(void *arg);
#endif /* CTL_IO_DELAY */

static void ctl_send_datamove_done(union ctl_io *io, int have_lock);
static void ctl_datamove_remote_write_cb(struct ctl_ha_dt_req *rq);
static int ctl_datamove_remote_dm_write_cb(union ctl_io *io);
static void ctl_datamove_remote_write(union ctl_io *io);
static int ctl_datamove_remote_dm_read_cb(union ctl_io *io);
static void ctl_datamove_remote_read_cb(struct ctl_ha_dt_req *rq);
static int ctl_datamove_remote_sgl_setup(union ctl_io *io);
static int ctl_datamove_remote_xfer(union ctl_io *io, unsigned command,
				    ctl_ha_dt_cb callback);
static void ctl_datamove_remote_read(union ctl_io *io);
static void ctl_datamove_remote(union ctl_io *io);
static int ctl_process_done(union ctl_io *io);
static void ctl_lun_thread(void *arg);
static void ctl_work_thread(void *arg);
static void ctl_enqueue_incoming(union ctl_io *io);
static void ctl_enqueue_rtr(union ctl_io *io);
static void ctl_enqueue_done(union ctl_io *io);
static void ctl_enqueue_isc(union ctl_io *io);
static const struct ctl_cmd_entry *
    ctl_get_cmd_entry(struct ctl_scsiio *ctsio, int *sa);
static const struct ctl_cmd_entry *
    ctl_validate_command(struct ctl_scsiio *ctsio);
static int ctl_cmd_applicable(uint8_t lun_type,
    const struct ctl_cmd_entry *entry);

/*
 * Load the serialization table.  This isn't very pretty, but is probably
 * the easiest way to do it.
 */
#include "ctl_ser_table.c"

/*
 * We only need to define open, close and ioctl routines for this driver.
 */
static struct cdevsw ctl_cdevsw = {
	.d_version =	D_VERSION,
	.d_flags =	0,
	.d_open =	ctl_open,
	.d_close =	ctl_close,
	.d_ioctl =	ctl_ioctl,
	.d_name =	"ctl",
};


MALLOC_DEFINE(M_CTL, "ctlmem", "Memory used for CTL");
MALLOC_DEFINE(M_CTLIO, "ctlio", "Memory used for CTL requests");

static int ctl_module_event_handler(module_t, int /*modeventtype_t*/, void *);

static moduledata_t ctl_moduledata = {
	"ctl",
	ctl_module_event_handler,
	NULL
};

DECLARE_MODULE(ctl, ctl_moduledata, SI_SUB_CONFIGURE, SI_ORDER_THIRD);
MODULE_VERSION(ctl, 1);

static struct ctl_frontend ioctl_frontend =
{
	.name = "ioctl",
};

static void
ctl_isc_handler_finish_xfer(struct ctl_softc *ctl_softc,
			    union ctl_ha_msg *msg_info)
{
	struct ctl_scsiio *ctsio;

	if (msg_info->hdr.original_sc == NULL) {
		printf("%s: original_sc == NULL!\n", __func__);
		/* XXX KDM now what? */
		return;
	}

	ctsio = &msg_info->hdr.original_sc->scsiio;
	ctsio->io_hdr.flags |= CTL_FLAG_IO_ACTIVE;
	ctsio->io_hdr.msg_type = CTL_MSG_FINISH_IO;
	ctsio->io_hdr.status = msg_info->hdr.status;
	ctsio->scsi_status = msg_info->scsi.scsi_status;
	ctsio->sense_len = msg_info->scsi.sense_len;
	ctsio->sense_residual = msg_info->scsi.sense_residual;
	ctsio->residual = msg_info->scsi.residual;
	memcpy(&ctsio->sense_data, &msg_info->scsi.sense_data,
	       sizeof(ctsio->sense_data));
	memcpy(&ctsio->io_hdr.ctl_private[CTL_PRIV_LBA_LEN].bytes,
	       &msg_info->scsi.lbalen, sizeof(msg_info->scsi.lbalen));
	ctl_enqueue_isc((union ctl_io *)ctsio);
}

static void
ctl_isc_handler_finish_ser_only(struct ctl_softc *ctl_softc,
				union ctl_ha_msg *msg_info)
{
	struct ctl_scsiio *ctsio;

	if (msg_info->hdr.serializing_sc == NULL) {
		printf("%s: serializing_sc == NULL!\n", __func__);
		/* XXX KDM now what? */
		return;
	}

	ctsio = &msg_info->hdr.serializing_sc->scsiio;
#if 0
	/*
	 * Attempt to catch the situation where an I/O has
	 * been freed, and we're using it again.
	 */
	if (ctsio->io_hdr.io_type == 0xff) {
		union ctl_io *tmp_io;
		tmp_io = (union ctl_io *)ctsio;
		printf("%s: %p use after free!\n", __func__,
		       ctsio);
		printf("%s: type %d msg %d cdb %x iptl: "
		       "%d:%d:%d:%d tag 0x%04x "
		       "flag %#x status %x\n",
			__func__,
			tmp_io->io_hdr.io_type,
			tmp_io->io_hdr.msg_type,
			tmp_io->scsiio.cdb[0],
			tmp_io->io_hdr.nexus.initid.id,
			tmp_io->io_hdr.nexus.targ_port,
			tmp_io->io_hdr.nexus.targ_target.id,
			tmp_io->io_hdr.nexus.targ_lun,
			(tmp_io->io_hdr.io_type ==
			CTL_IO_TASK) ?
			tmp_io->taskio.tag_num :
			tmp_io->scsiio.tag_num,
		        tmp_io->io_hdr.flags,
			tmp_io->io_hdr.status);
	}
#endif
	ctsio->io_hdr.msg_type = CTL_MSG_FINISH_IO;
	ctl_enqueue_isc((union ctl_io *)ctsio);
}

/*
 * ISC (Inter Shelf Communication) event handler.  Events from the HA
 * subsystem come in here.
 */
static void
ctl_isc_event_handler(ctl_ha_channel channel, ctl_ha_event event, int param)
{
	struct ctl_softc *ctl_softc;
	union ctl_io *io;
	struct ctl_prio *presio;
	ctl_ha_status isc_status;

	ctl_softc = control_softc;
	io = NULL;


#if 0
	printf("CTL: Isc Msg event %d\n", event);
#endif
	if (event == CTL_HA_EVT_MSG_RECV) {
		union ctl_ha_msg msg_info;

		isc_status = ctl_ha_msg_recv(CTL_HA_CHAN_CTL, &msg_info,
					     sizeof(msg_info), /*wait*/ 0);
#if 0
		printf("CTL: msg_type %d\n", msg_info.msg_type);
#endif
		if (isc_status != 0) {
			printf("Error receiving message, status = %d\n",
			       isc_status);
			return;
		}

		switch (msg_info.hdr.msg_type) {
		case CTL_MSG_SERIALIZE:
#if 0
			printf("Serialize\n");
#endif
			io = ctl_alloc_io((void *)ctl_softc->othersc_pool);
			if (io == NULL) {
				printf("ctl_isc_event_handler: can't allocate "
				       "ctl_io!\n");
				/* Bad Juju */
				/* Need to set busy and send msg back */
				msg_info.hdr.msg_type = CTL_MSG_BAD_JUJU;
				msg_info.hdr.status = CTL_SCSI_ERROR;
				msg_info.scsi.scsi_status = SCSI_STATUS_BUSY;
				msg_info.scsi.sense_len = 0;
			        if (ctl_ha_msg_send(CTL_HA_CHAN_CTL, &msg_info,
				    sizeof(msg_info), 0) > CTL_HA_STATUS_SUCCESS){
				}
				goto bailout;
			}
			ctl_zero_io(io);
			// populate ctsio from msg_info
			io->io_hdr.io_type = CTL_IO_SCSI;
			io->io_hdr.msg_type = CTL_MSG_SERIALIZE;
			io->io_hdr.original_sc = msg_info.hdr.original_sc;
#if 0
			printf("pOrig %x\n", (int)msg_info.original_sc);
#endif
			io->io_hdr.flags |= CTL_FLAG_FROM_OTHER_SC |
					    CTL_FLAG_IO_ACTIVE;
			/*
			 * If we're in serialization-only mode, we don't
			 * want to go through full done processing.  Thus
			 * the COPY flag.
			 *
			 * XXX KDM add another flag that is more specific.
			 */
			if (ctl_softc->ha_mode == CTL_HA_MODE_SER_ONLY)
				io->io_hdr.flags |= CTL_FLAG_INT_COPY;
			io->io_hdr.nexus = msg_info.hdr.nexus;
#if 0
			printf("targ %d, port %d, iid %d, lun %d\n",
			       io->io_hdr.nexus.targ_target.id,
			       io->io_hdr.nexus.targ_port,
			       io->io_hdr.nexus.initid.id,
			       io->io_hdr.nexus.targ_lun);
#endif
			io->scsiio.tag_num = msg_info.scsi.tag_num;
			io->scsiio.tag_type = msg_info.scsi.tag_type;
			memcpy(io->scsiio.cdb, msg_info.scsi.cdb,
			       CTL_MAX_CDBLEN);
			if (ctl_softc->ha_mode == CTL_HA_MODE_XFER) {
				const struct ctl_cmd_entry *entry;

				entry = ctl_get_cmd_entry(&io->scsiio, NULL);
				io->io_hdr.flags &= ~CTL_FLAG_DATA_MASK;
				io->io_hdr.flags |=
					entry->flags & CTL_FLAG_DATA_MASK;
			}
			ctl_enqueue_isc(io);
			break;

		/* Performed on the Originating SC, XFER mode only */
		case CTL_MSG_DATAMOVE: {
			struct ctl_sg_entry *sgl;
			int i, j;

			io = msg_info.hdr.original_sc;
			if (io == NULL) {
				printf("%s: original_sc == NULL!\n", __func__);
				/* XXX KDM do something here */
				break;
			}
			io->io_hdr.msg_type = CTL_MSG_DATAMOVE;
			io->io_hdr.flags |= CTL_FLAG_IO_ACTIVE;
			/*
			 * Keep track of this, we need to send it back over
			 * when the datamove is complete.
			 */
			io->io_hdr.serializing_sc = msg_info.hdr.serializing_sc;

			if (msg_info.dt.sg_sequence == 0) {
				/*
				 * XXX KDM we use the preallocated S/G list
				 * here, but we'll need to change this to
				 * dynamic allocation if we need larger S/G
				 * lists.
				 */
				if (msg_info.dt.kern_sg_entries >
				    sizeof(io->io_hdr.remote_sglist) /
				    sizeof(io->io_hdr.remote_sglist[0])) {
					printf("%s: number of S/G entries "
					    "needed %u > allocated num %zd\n",
					    __func__,
					    msg_info.dt.kern_sg_entries,
					    sizeof(io->io_hdr.remote_sglist)/
					    sizeof(io->io_hdr.remote_sglist[0]));
				
					/*
					 * XXX KDM send a message back to
					 * the other side to shut down the
					 * DMA.  The error will come back
					 * through via the normal channel.
					 */
					break;
				}
				sgl = io->io_hdr.remote_sglist;
				memset(sgl, 0,
				       sizeof(io->io_hdr.remote_sglist));

				io->scsiio.kern_data_ptr = (uint8_t *)sgl;

				io->scsiio.kern_sg_entries =
					msg_info.dt.kern_sg_entries;
				io->scsiio.rem_sg_entries =
					msg_info.dt.kern_sg_entries;
				io->scsiio.kern_data_len =
					msg_info.dt.kern_data_len;
				io->scsiio.kern_total_len =
					msg_info.dt.kern_total_len;
				io->scsiio.kern_data_resid =
					msg_info.dt.kern_data_resid;
				io->scsiio.kern_rel_offset =
					msg_info.dt.kern_rel_offset;
				/*
				 * Clear out per-DMA flags.
				 */
				io->io_hdr.flags &= ~CTL_FLAG_RDMA_MASK;
				/*
				 * Add per-DMA flags that are set for this
				 * particular DMA request.
				 */
				io->io_hdr.flags |= msg_info.dt.flags &
						    CTL_FLAG_RDMA_MASK;
			} else
				sgl = (struct ctl_sg_entry *)
					io->scsiio.kern_data_ptr;

			for (i = msg_info.dt.sent_sg_entries, j = 0;
			     i < (msg_info.dt.sent_sg_entries +
			     msg_info.dt.cur_sg_entries); i++, j++) {
				sgl[i].addr = msg_info.dt.sg_list[j].addr;
				sgl[i].len = msg_info.dt.sg_list[j].len;

#if 0
				printf("%s: L: %p,%d -> %p,%d j=%d, i=%d\n",
				       __func__,
				       msg_info.dt.sg_list[j].addr,
				       msg_info.dt.sg_list[j].len,
				       sgl[i].addr, sgl[i].len, j, i);
#endif
			}
#if 0
			memcpy(&sgl[msg_info.dt.sent_sg_entries],
			       msg_info.dt.sg_list,
			       sizeof(*sgl) * msg_info.dt.cur_sg_entries);
#endif

			/*
			 * If this is the last piece of the I/O, we've got
			 * the full S/G list.  Queue processing in the thread.
			 * Otherwise wait for the next piece.
			 */
			if (msg_info.dt.sg_last != 0)
				ctl_enqueue_isc(io);
			break;
		}
		/* Performed on the Serializing (primary) SC, XFER mode only */
		case CTL_MSG_DATAMOVE_DONE: {
			if (msg_info.hdr.serializing_sc == NULL) {
				printf("%s: serializing_sc == NULL!\n",
				       __func__);
				/* XXX KDM now what? */
				break;
			}
			/*
			 * We grab the sense information here in case
			 * there was a failure, so we can return status
			 * back to the initiator.
			 */
			io = msg_info.hdr.serializing_sc;
			io->io_hdr.msg_type = CTL_MSG_DATAMOVE_DONE;
			io->io_hdr.status = msg_info.hdr.status;
			io->scsiio.scsi_status = msg_info.scsi.scsi_status;
			io->scsiio.sense_len = msg_info.scsi.sense_len;
			io->scsiio.sense_residual =msg_info.scsi.sense_residual;
			io->io_hdr.port_status = msg_info.scsi.fetd_status;
			io->scsiio.residual = msg_info.scsi.residual;
			memcpy(&io->scsiio.sense_data,&msg_info.scsi.sense_data,
			       sizeof(io->scsiio.sense_data));
			ctl_enqueue_isc(io);
			break;
		}

		/* Preformed on Originating SC, SER_ONLY mode */
		case CTL_MSG_R2R:
			io = msg_info.hdr.original_sc;
			if (io == NULL) {
				printf("%s: Major Bummer\n", __func__);
				return;
			} else {
#if 0
				printf("pOrig %x\n",(int) ctsio);
#endif
			}
			io->io_hdr.msg_type = CTL_MSG_R2R;
			io->io_hdr.serializing_sc = msg_info.hdr.serializing_sc;
			ctl_enqueue_isc(io);
			break;

		/*
		 * Performed on Serializing(i.e. primary SC) SC in SER_ONLY
		 * mode.
		 * Performed on the Originating (i.e. secondary) SC in XFER
		 * mode
		 */
		case CTL_MSG_FINISH_IO:
			if (ctl_softc->ha_mode == CTL_HA_MODE_XFER)
				ctl_isc_handler_finish_xfer(ctl_softc,
							    &msg_info);
			else
				ctl_isc_handler_finish_ser_only(ctl_softc,
								&msg_info);
			break;

		/* Preformed on Originating SC */
		case CTL_MSG_BAD_JUJU:
			io = msg_info.hdr.original_sc;
			if (io == NULL) {
				printf("%s: Bad JUJU!, original_sc is NULL!\n",
				       __func__);
				break;
			}
			ctl_copy_sense_data(&msg_info, io);
			/*
			 * IO should have already been cleaned up on other
			 * SC so clear this flag so we won't send a message
			 * back to finish the IO there.
			 */
			io->io_hdr.flags &= ~CTL_FLAG_SENT_2OTHER_SC;
			io->io_hdr.flags |= CTL_FLAG_IO_ACTIVE;

			/* io = msg_info.hdr.serializing_sc; */
			io->io_hdr.msg_type = CTL_MSG_BAD_JUJU;
			ctl_enqueue_isc(io);
			break;

		/* Handle resets sent from the other side */
		case CTL_MSG_MANAGE_TASKS: {
			struct ctl_taskio *taskio;
			taskio = (struct ctl_taskio *)ctl_alloc_io(
				(void *)ctl_softc->othersc_pool);
			if (taskio == NULL) {
				printf("ctl_isc_event_handler: can't allocate "
				       "ctl_io!\n");
				/* Bad Juju */
				/* should I just call the proper reset func
				   here??? */
				goto bailout;
			}
			ctl_zero_io((union ctl_io *)taskio);
			taskio->io_hdr.io_type = CTL_IO_TASK;
			taskio->io_hdr.flags |= CTL_FLAG_FROM_OTHER_SC;
			taskio->io_hdr.nexus = msg_info.hdr.nexus;
			taskio->task_action = msg_info.task.task_action;
			taskio->tag_num = msg_info.task.tag_num;
			taskio->tag_type = msg_info.task.tag_type;
#ifdef CTL_TIME_IO
			taskio->io_hdr.start_time = time_uptime;
			getbintime(&taskio->io_hdr.start_bt);
#if 0
			cs_prof_gettime(&taskio->io_hdr.start_ticks);
#endif
#endif /* CTL_TIME_IO */
			ctl_run_task((union ctl_io *)taskio);
			break;
		}
		/* Persistent Reserve action which needs attention */
		case CTL_MSG_PERS_ACTION:
			presio = (struct ctl_prio *)ctl_alloc_io(
				(void *)ctl_softc->othersc_pool);
			if (presio == NULL) {
				printf("ctl_isc_event_handler: can't allocate "
				       "ctl_io!\n");
				/* Bad Juju */
				/* Need to set busy and send msg back */
				goto bailout;
			}
			ctl_zero_io((union ctl_io *)presio);
			presio->io_hdr.msg_type = CTL_MSG_PERS_ACTION;
			presio->pr_msg = msg_info.pr;
			ctl_enqueue_isc((union ctl_io *)presio);
			break;
		case CTL_MSG_SYNC_FE:
			rcv_sync_msg = 1;
			break;
		case CTL_MSG_APS_LOCK: {
			// It's quicker to execute this then to
			// queue it.
			struct ctl_lun *lun;
			struct ctl_page_index *page_index;
			struct copan_aps_subpage *current_sp;
			uint32_t targ_lun;

			targ_lun = msg_info.hdr.nexus.targ_mapped_lun;
			lun = ctl_softc->ctl_luns[targ_lun];
			mtx_lock(&lun->lun_lock);
			page_index = &lun->mode_pages.index[index_to_aps_page];
			current_sp = (struct copan_aps_subpage *)
				     (page_index->page_data +
				     (page_index->page_len * CTL_PAGE_CURRENT));

			current_sp->lock_active = msg_info.aps.lock_flag;
			mtx_unlock(&lun->lun_lock);
		        break;
		}
		default:
		        printf("How did I get here?\n");
		}
	} else if (event == CTL_HA_EVT_MSG_SENT) {
		if (param != CTL_HA_STATUS_SUCCESS) {
			printf("Bad status from ctl_ha_msg_send status %d\n",
			       param);
		}
		return;
	} else if (event == CTL_HA_EVT_DISCONNECT) {
		printf("CTL: Got a disconnect from Isc\n");
		return;
	} else {
		printf("ctl_isc_event_handler: Unknown event %d\n", event);
		return;
	}

bailout:
	return;
}

static void
ctl_copy_sense_data(union ctl_ha_msg *src, union ctl_io *dest)
{
	struct scsi_sense_data *sense;

	sense = &dest->scsiio.sense_data;
	bcopy(&src->scsi.sense_data, sense, sizeof(*sense));
	dest->scsiio.scsi_status = src->scsi.scsi_status;
	dest->scsiio.sense_len = src->scsi.sense_len;
	dest->io_hdr.status = src->hdr.status;
}

static int
ctl_init(void)
{
	struct ctl_softc *softc;
	struct ctl_io_pool *internal_pool, *emergency_pool, *other_pool;
	struct ctl_port *port;
        uint8_t sc_id =0;
	int i, error, retval;
	//int isc_retval;

	retval = 0;
	ctl_pause_rtr = 0;
        rcv_sync_msg = 0;

	control_softc = malloc(sizeof(*control_softc), M_DEVBUF,
			       M_WAITOK | M_ZERO);
	softc = control_softc;

	softc->dev = make_dev(&ctl_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600,
			      "cam/ctl");

	softc->dev->si_drv1 = softc;

	/*
	 * By default, return a "bad LUN" peripheral qualifier for unknown
	 * LUNs.  The user can override this default using the tunable or
	 * sysctl.  See the comment in ctl_inquiry_std() for more details.
	 */
	softc->inquiry_pq_no_lun = 1;
	TUNABLE_INT_FETCH("kern.cam.ctl.inquiry_pq_no_lun",
			  &softc->inquiry_pq_no_lun);
	sysctl_ctx_init(&softc->sysctl_ctx);
	softc->sysctl_tree = SYSCTL_ADD_NODE(&softc->sysctl_ctx,
		SYSCTL_STATIC_CHILDREN(_kern_cam), OID_AUTO, "ctl",
		CTLFLAG_RD, 0, "CAM Target Layer");

	if (softc->sysctl_tree == NULL) {
		printf("%s: unable to allocate sysctl tree\n", __func__);
		destroy_dev(softc->dev);
		free(control_softc, M_DEVBUF);
		control_softc = NULL;
		return (ENOMEM);
	}

	SYSCTL_ADD_INT(&softc->sysctl_ctx,
		       SYSCTL_CHILDREN(softc->sysctl_tree), OID_AUTO,
		       "inquiry_pq_no_lun", CTLFLAG_RW,
		       &softc->inquiry_pq_no_lun, 0,
		       "Report no lun possible for invalid LUNs");

	mtx_init(&softc->ctl_lock, "CTL mutex", NULL, MTX_DEF);
	mtx_init(&softc->pool_lock, "CTL pool mutex", NULL, MTX_DEF);
	softc->open_count = 0;

	/*
	 * Default to actually sending a SYNCHRONIZE CACHE command down to
	 * the drive.
	 */
	softc->flags = CTL_FLAG_REAL_SYNC;

	/*
	 * In Copan's HA scheme, the "master" and "slave" roles are
	 * figured out through the slot the controller is in.  Although it
	 * is an active/active system, someone has to be in charge.
 	 */
#ifdef NEEDTOPORT
        scmicro_rw(SCMICRO_GET_SHELF_ID, &sc_id);
#endif

        if (sc_id == 0) {
		softc->flags |= CTL_FLAG_MASTER_SHELF;
		persis_offset = 0;
	} else
		persis_offset = CTL_MAX_INITIATORS;

	/*
	 * XXX KDM need to figure out where we want to get our target ID
	 * and WWID.  Is it different on each port?
	 */
	softc->target.id = 0;
	softc->target.wwid[0] = 0x12345678;
	softc->target.wwid[1] = 0x87654321;
	STAILQ_INIT(&softc->lun_list);
	STAILQ_INIT(&softc->pending_lun_queue);
	STAILQ_INIT(&softc->fe_list);
	STAILQ_INIT(&softc->port_list);
	STAILQ_INIT(&softc->be_list);
	STAILQ_INIT(&softc->io_pools);
	ctl_tpc_init(softc);

	if (ctl_pool_create(softc, CTL_POOL_INTERNAL, CTL_POOL_ENTRIES_INTERNAL,
			    &internal_pool)!= 0){
		printf("ctl: can't allocate %d entry internal pool, "
		       "exiting\n", CTL_POOL_ENTRIES_INTERNAL);
		return (ENOMEM);
	}

	if (ctl_pool_create(softc, CTL_POOL_EMERGENCY,
			    CTL_POOL_ENTRIES_EMERGENCY, &emergency_pool) != 0) {
		printf("ctl: can't allocate %d entry emergency pool, "
		       "exiting\n", CTL_POOL_ENTRIES_EMERGENCY);
		ctl_pool_free(internal_pool);
		return (ENOMEM);
	}

	if (ctl_pool_create(softc, CTL_POOL_4OTHERSC, CTL_POOL_ENTRIES_OTHER_SC,
	                    &other_pool) != 0)
	{
		printf("ctl: can't allocate %d entry other SC pool, "
		       "exiting\n", CTL_POOL_ENTRIES_OTHER_SC);
		ctl_pool_free(internal_pool);
		ctl_pool_free(emergency_pool);
		return (ENOMEM);
	}

	softc->internal_pool = internal_pool;
	softc->emergency_pool = emergency_pool;
	softc->othersc_pool = other_pool;

	if (worker_threads <= 0)
		worker_threads = max(1, mp_ncpus / 4);
	if (worker_threads > CTL_MAX_THREADS)
		worker_threads = CTL_MAX_THREADS;

	for (i = 0; i < worker_threads; i++) {
		struct ctl_thread *thr = &softc->threads[i];

		mtx_init(&thr->queue_lock, "CTL queue mutex", NULL, MTX_DEF);
		thr->ctl_softc = softc;
		STAILQ_INIT(&thr->incoming_queue);
		STAILQ_INIT(&thr->rtr_queue);
		STAILQ_INIT(&thr->done_queue);
		STAILQ_INIT(&thr->isc_queue);

		error = kproc_kthread_add(ctl_work_thread, thr,
		    &softc->ctl_proc, &thr->thread, 0, 0, "ctl", "work%d", i);
		if (error != 0) {
			printf("error creating CTL work thread!\n");
			ctl_pool_free(internal_pool);
			ctl_pool_free(emergency_pool);
			ctl_pool_free(other_pool);
			return (error);
		}
	}
	error = kproc_kthread_add(ctl_lun_thread, softc,
	    &softc->ctl_proc, NULL, 0, 0, "ctl", "lun");
	if (error != 0) {
		printf("error creating CTL lun thread!\n");
		ctl_pool_free(internal_pool);
		ctl_pool_free(emergency_pool);
		ctl_pool_free(other_pool);
		return (error);
	}
	if (bootverbose)
		printf("ctl: CAM Target Layer loaded\n");

	/*
	 * Initialize the ioctl front end.
	 */
	ctl_frontend_register(&ioctl_frontend);
	port = &softc->ioctl_info.port;
	port->frontend = &ioctl_frontend;
	sprintf(softc->ioctl_info.port_name, "ioctl");
	port->port_type = CTL_PORT_IOCTL;
	port->num_requested_ctl_io = 100;
	port->port_name = softc->ioctl_info.port_name;
	port->port_online = ctl_ioctl_online;
	port->port_offline = ctl_ioctl_offline;
	port->onoff_arg = &softc->ioctl_info;
	port->lun_enable = ctl_ioctl_lun_enable;
	port->lun_disable = ctl_ioctl_lun_disable;
	port->targ_lun_arg = &softc->ioctl_info;
	port->fe_datamove = ctl_ioctl_datamove;
	port->fe_done = ctl_ioctl_done;
	port->max_targets = 15;
	port->max_target_id = 15;

	if (ctl_port_register(&softc->ioctl_info.port,
	                  (softc->flags & CTL_FLAG_MASTER_SHELF)) != 0) {
		printf("ctl: ioctl front end registration failed, will "
		       "continue anyway\n");
	}

#ifdef CTL_IO_DELAY
	if (sizeof(struct callout) > CTL_TIMER_BYTES) {
		printf("sizeof(struct callout) %zd > CTL_TIMER_BYTES %zd\n",
		       sizeof(struct callout), CTL_TIMER_BYTES);
		return (EINVAL);
	}
#endif /* CTL_IO_DELAY */

	return (0);
}

void
ctl_shutdown(void)
{
	struct ctl_softc *softc;
	struct ctl_lun *lun, *next_lun;
	struct ctl_io_pool *pool;

	softc = (struct ctl_softc *)control_softc;

	if (ctl_port_deregister(&softc->ioctl_info.port) != 0)
		printf("ctl: ioctl front end deregistration failed\n");

	mtx_lock(&softc->ctl_lock);

	/*
	 * Free up each LUN.
	 */
	for (lun = STAILQ_FIRST(&softc->lun_list); lun != NULL; lun = next_lun){
		next_lun = STAILQ_NEXT(lun, links);
		ctl_free_lun(lun);
	}

	mtx_unlock(&softc->ctl_lock);

	ctl_frontend_deregister(&ioctl_frontend);

	/*
	 * This will rip the rug out from under any FETDs or anyone else
	 * that has a pool allocated.  Since we increment our module
	 * refcount any time someone outside the main CTL module allocates
	 * a pool, we shouldn't have any problems here.  The user won't be
	 * able to unload the CTL module until client modules have
	 * successfully unloaded.
	 */
	while ((pool = STAILQ_FIRST(&softc->io_pools)) != NULL)
		ctl_pool_free(pool);

#if 0
	ctl_shutdown_thread(softc->work_thread);
	mtx_destroy(&softc->queue_lock);
#endif

	ctl_tpc_shutdown(softc);
	mtx_destroy(&softc->pool_lock);
	mtx_destroy(&softc->ctl_lock);

	destroy_dev(softc->dev);

	sysctl_ctx_free(&softc->sysctl_ctx);

	free(control_softc, M_DEVBUF);
	control_softc = NULL;

	if (bootverbose)
		printf("ctl: CAM Target Layer unloaded\n");
}

static int
ctl_module_event_handler(module_t mod, int what, void *arg)
{

	switch (what) {
	case MOD_LOAD:
		return (ctl_init());
	case MOD_UNLOAD:
		return (EBUSY);
	default:
		return (EOPNOTSUPP);
	}
}

/*
 * XXX KDM should we do some access checks here?  Bump a reference count to
 * prevent a CTL module from being unloaded while someone has it open?
 */
static int
ctl_open(struct cdev *dev, int flags, int fmt, struct thread *td)
{
	return (0);
}

static int
ctl_close(struct cdev *dev, int flags, int fmt, struct thread *td)
{
	return (0);
}

int
ctl_port_enable(ctl_port_type port_type)
{
	struct ctl_softc *softc;
	struct ctl_port *port;

	if (ctl_is_single == 0) {
		union ctl_ha_msg msg_info;
		int isc_retval;

#if 0
		printf("%s: HA mode, synchronizing frontend enable\n",
		        __func__);
#endif
		msg_info.hdr.msg_type = CTL_MSG_SYNC_FE;
	        if ((isc_retval=ctl_ha_msg_send(CTL_HA_CHAN_CTL, &msg_info,
		        sizeof(msg_info), 1 )) > CTL_HA_STATUS_SUCCESS) {
			printf("Sync msg send error retval %d\n", isc_retval);
		}
		if (!rcv_sync_msg) {
			isc_retval=ctl_ha_msg_recv(CTL_HA_CHAN_CTL, &msg_info,
			        sizeof(msg_info), 1);
		}
#if 0
        	printf("CTL:Frontend Enable\n");
	} else {
		printf("%s: single mode, skipping frontend synchronization\n",
		        __func__);
#endif
	}

	softc = control_softc;

	STAILQ_FOREACH(port, &softc->port_list, links) {
		if (port_type & port->port_type)
		{
#if 0
			printf("port %d\n", port->targ_port);
#endif
			ctl_port_online(port);
		}
	}

	return (0);
}

int
ctl_port_disable(ctl_port_type port_type)
{
	struct ctl_softc *softc;
	struct ctl_port *port;

	softc = control_softc;

	STAILQ_FOREACH(port, &softc->port_list, links) {
		if (port_type & port->port_type)
			ctl_port_offline(port);
	}

	return (0);
}

/*
 * Returns 0 for success, 1 for failure.
 * Currently the only failure mode is if there aren't enough entries
 * allocated.  So, in case of a failure, look at num_entries_dropped,
 * reallocate and try again.
 */
int
ctl_port_list(struct ctl_port_entry *entries, int num_entries_alloced,
	      int *num_entries_filled, int *num_entries_dropped,
	      ctl_port_type port_type, int no_virtual)
{
	struct ctl_softc *softc;
	struct ctl_port *port;
	int entries_dropped, entries_filled;
	int retval;
	int i;

	softc = control_softc;

	retval = 0;
	entries_filled = 0;
	entries_dropped = 0;

	i = 0;
	mtx_lock(&softc->ctl_lock);
	STAILQ_FOREACH(port, &softc->port_list, links) {
		struct ctl_port_entry *entry;

		if ((port->port_type & port_type) == 0)
			continue;

		if ((no_virtual != 0)
		 && (port->virtual_port != 0))
			continue;

		if (entries_filled >= num_entries_alloced) {
			entries_dropped++;
			continue;
		}
		entry = &entries[i];

		entry->port_type = port->port_type;
		strlcpy(entry->port_name, port->port_name,
			sizeof(entry->port_name));
		entry->physical_port = port->physical_port;
		entry->virtual_port = port->virtual_port;
		entry->wwnn = port->wwnn;
		entry->wwpn = port->wwpn;

		i++;
		entries_filled++;
	}

	mtx_unlock(&softc->ctl_lock);

	if (entries_dropped > 0)
		retval = 1;

	*num_entries_dropped = entries_dropped;
	*num_entries_filled = entries_filled;

	return (retval);
}

static void
ctl_ioctl_online(void *arg)
{
	struct ctl_ioctl_info *ioctl_info;

	ioctl_info = (struct ctl_ioctl_info *)arg;

	ioctl_info->flags |= CTL_IOCTL_FLAG_ENABLED;
}

static void
ctl_ioctl_offline(void *arg)
{
	struct ctl_ioctl_info *ioctl_info;

	ioctl_info = (struct ctl_ioctl_info *)arg;

	ioctl_info->flags &= ~CTL_IOCTL_FLAG_ENABLED;
}

/*
 * Remove an initiator by port number and initiator ID.
 * Returns 0 for success, -1 for failure.
 */
int
ctl_remove_initiator(struct ctl_port *port, int iid)
{
	struct ctl_softc *softc = control_softc;

	mtx_assert(&softc->ctl_lock, MA_NOTOWNED);

	if (iid > CTL_MAX_INIT_PER_PORT) {
		printf("%s: initiator ID %u > maximun %u!\n",
		       __func__, iid, CTL_MAX_INIT_PER_PORT);
		return (-1);
	}

	mtx_lock(&softc->ctl_lock);
	port->wwpn_iid[iid].in_use--;
	port->wwpn_iid[iid].last_use = time_uptime;
	mtx_unlock(&softc->ctl_lock);

	return (0);
}

/*
 * Add an initiator to the initiator map.
 * Returns iid for success, < 0 for failure.
 */
int
ctl_add_initiator(struct ctl_port *port, int iid, uint64_t wwpn, char *name)
{
	struct ctl_softc *softc = control_softc;
	time_t best_time;
	int i, best;

	mtx_assert(&softc->ctl_lock, MA_NOTOWNED);

	if (iid >= CTL_MAX_INIT_PER_PORT) {
		printf("%s: WWPN %#jx initiator ID %u > maximum %u!\n",
		       __func__, wwpn, iid, CTL_MAX_INIT_PER_PORT);
		free(name, M_CTL);
		return (-1);
	}

	mtx_lock(&softc->ctl_lock);

	if (iid < 0 && (wwpn != 0 || name != NULL)) {
		for (i = 0; i < CTL_MAX_INIT_PER_PORT; i++) {
			if (wwpn != 0 && wwpn == port->wwpn_iid[i].wwpn) {
				iid = i;
				break;
			}
			if (name != NULL && port->wwpn_iid[i].name != NULL &&
			    strcmp(name, port->wwpn_iid[i].name) == 0) {
				iid = i;
				break;
			}
		}
	}

	if (iid < 0) {
		for (i = 0; i < CTL_MAX_INIT_PER_PORT; i++) {
			if (port->wwpn_iid[i].in_use == 0 &&
			    port->wwpn_iid[i].wwpn == 0 &&
			    port->wwpn_iid[i].name == NULL) {
				iid = i;
				break;
			}
		}
	}

	if (iid < 0) {
		best = -1;
		best_time = INT32_MAX;
		for (i = 0; i < CTL_MAX_INIT_PER_PORT; i++) {
			if (port->wwpn_iid[i].in_use == 0) {
				if (port->wwpn_iid[i].last_use < best_time) {
					best = i;
					best_time = port->wwpn_iid[i].last_use;
				}
			}
		}
		iid = best;
	}

	if (iid < 0) {
		mtx_unlock(&softc->ctl_lock);
		free(name, M_CTL);
		return (-2);
	}

	if (port->wwpn_iid[iid].in_use > 0 && (wwpn != 0 || name != NULL)) {
		/*
		 * This is not an error yet.
		 */
		if (wwpn != 0 && wwpn == port->wwpn_iid[iid].wwpn) {
#if 0
			printf("%s: port %d iid %u WWPN %#jx arrived"
			    " again\n", __func__, port->targ_port,
			    iid, (uintmax_t)wwpn);
#endif
			goto take;
		}
		if (name != NULL && port->wwpn_iid[iid].name != NULL &&
		    strcmp(name, port->wwpn_iid[iid].name) == 0) {
#if 0
			printf("%s: port %d iid %u name '%s' arrived"
			    " again\n", __func__, port->targ_port,
			    iid, name);
#endif
			goto take;
		}

		/*
		 * This is an error, but what do we do about it?  The
		 * driver is telling us we have a new WWPN for this
		 * initiator ID, so we pretty much need to use it.
		 */
		printf("%s: port %d iid %u WWPN %#jx '%s' arrived,"
		    " but WWPN %#jx '%s' is still at that address\n",
		    __func__, port->targ_port, iid, wwpn, name,
		    (uintmax_t)port->wwpn_iid[iid].wwpn,
		    port->wwpn_iid[iid].name);

		/*
		 * XXX KDM clear have_ca and ua_pending on each LUN for
		 * this initiator.
		 */
	}
take:
	free(port->wwpn_iid[iid].name, M_CTL);
	port->wwpn_iid[iid].name = name;
	port->wwpn_iid[iid].wwpn = wwpn;
	port->wwpn_iid[iid].in_use++;
	mtx_unlock(&softc->ctl_lock);

	return (iid);
}

static int
ctl_create_iid(struct ctl_port *port, int iid, uint8_t *buf)
{
	int len;

	switch (port->port_type) {
	case CTL_PORT_FC:
	{
		struct scsi_transportid_fcp *id =
		    (struct scsi_transportid_fcp *)buf;
		if (port->wwpn_iid[iid].wwpn == 0)
			return (0);
		memset(id, 0, sizeof(*id));
		id->format_protocol = SCSI_PROTO_FC;
		scsi_u64to8b(port->wwpn_iid[iid].wwpn, id->n_port_name);
		return (sizeof(*id));
	}
	case CTL_PORT_ISCSI:
	{
		struct scsi_transportid_iscsi_port *id =
		    (struct scsi_transportid_iscsi_port *)buf;
		if (port->wwpn_iid[iid].name == NULL)
			return (0);
		memset(id, 0, 256);
		id->format_protocol = SCSI_TRN_ISCSI_FORMAT_PORT |
		    SCSI_PROTO_ISCSI;
		len = strlcpy(id->iscsi_name, port->wwpn_iid[iid].name, 252) + 1;
		len = roundup2(min(len, 252), 4);
		scsi_ulto2b(len, id->additional_length);
		return (sizeof(*id) + len);
	}
	case CTL_PORT_SAS:
	{
		struct scsi_transportid_sas *id =
		    (struct scsi_transportid_sas *)buf;
		if (port->wwpn_iid[iid].wwpn == 0)
			return (0);
		memset(id, 0, sizeof(*id));
		id->format_protocol = SCSI_PROTO_SAS;
		scsi_u64to8b(port->wwpn_iid[iid].wwpn, id->sas_address);
		return (sizeof(*id));
	}
	default:
	{
		struct scsi_transportid_spi *id =
		    (struct scsi_transportid_spi *)buf;
		memset(id, 0, sizeof(*id));
		id->format_protocol = SCSI_PROTO_SPI;
		scsi_ulto2b(iid, id->scsi_addr);
		scsi_ulto2b(port->targ_port, id->rel_trgt_port_id);
		return (sizeof(*id));
	}
	}
}

static int
ctl_ioctl_lun_enable(void *arg, struct ctl_id targ_id, int lun_id)
{
	return (0);
}

static int
ctl_ioctl_lun_disable(void *arg, struct ctl_id targ_id, int lun_id)
{
	return (0);
}

/*
 * Data movement routine for the CTL ioctl frontend port.
 */
static int
ctl_ioctl_do_datamove(struct ctl_scsiio *ctsio)
{
	struct ctl_sg_entry *ext_sglist, *kern_sglist;
	struct ctl_sg_entry ext_entry, kern_entry;
	int ext_sglen, ext_sg_entries, kern_sg_entries;
	int ext_sg_start, ext_offset;
	int len_to_copy, len_copied;
	int kern_watermark, ext_watermark;
	int ext_sglist_malloced;
	int i, j;

	ext_sglist_malloced = 0;
	ext_sg_start = 0;
	ext_offset = 0;

	CTL_DEBUG_PRINT(("ctl_ioctl_do_datamove\n"));

	/*
	 * If this flag is set, fake the data transfer.
	 */
	if (ctsio->io_hdr.flags & CTL_FLAG_NO_DATAMOVE) {
		ctsio->ext_data_filled = ctsio->ext_data_len;
		goto bailout;
	}

	/*
	 * To simplify things here, if we have a single buffer, stick it in
	 * a S/G entry and just make it a single entry S/G list.
	 */
	if (ctsio->io_hdr.flags & CTL_FLAG_EDPTR_SGLIST) {
		int len_seen;

		ext_sglen = ctsio->ext_sg_entries * sizeof(*ext_sglist);

		ext_sglist = (struct ctl_sg_entry *)malloc(ext_sglen, M_CTL,
							   M_WAITOK);
		ext_sglist_malloced = 1;
		if (copyin(ctsio->ext_data_ptr, ext_sglist,
				   ext_sglen) != 0) {
			ctl_set_internal_failure(ctsio,
						 /*sks_valid*/ 0,
						 /*retry_count*/ 0);
			goto bailout;
		}
		ext_sg_entries = ctsio->ext_sg_entries;
		len_seen = 0;
		for (i = 0; i < ext_sg_entries; i++) {
			if ((len_seen + ext_sglist[i].len) >=
			     ctsio->ext_data_filled) {
				ext_sg_start = i;
				ext_offset = ctsio->ext_data_filled - len_seen;
				break;
			}
			len_seen += ext_sglist[i].len;
		}
	} else {
		ext_sglist = &ext_entry;
		ext_sglist->addr = ctsio->ext_data_ptr;
		ext_sglist->len = ctsio->ext_data_len;
		ext_sg_entries = 1;
		ext_sg_start = 0;
		ext_offset = ctsio->ext_data_filled;
	}

	if (ctsio->kern_sg_entries > 0) {
		kern_sglist = (struct ctl_sg_entry *)ctsio->kern_data_ptr;
		kern_sg_entries = ctsio->kern_sg_entries;
	} else {
		kern_sglist = &kern_entry;
		kern_sglist->addr = ctsio->kern_data_ptr;
		kern_sglist->len = ctsio->kern_data_len;
		kern_sg_entries = 1;
	}


	kern_watermark = 0;
	ext_watermark = ext_offset;
	len_copied = 0;
	for (i = ext_sg_start, j = 0;
	     i < ext_sg_entries && j < kern_sg_entries;) {
		uint8_t *ext_ptr, *kern_ptr;

		len_to_copy = ctl_min(ext_sglist[i].len - ext_watermark,
				      kern_sglist[j].len - kern_watermark);

		ext_ptr = (uint8_t *)ext_sglist[i].addr;
		ext_ptr = ext_ptr + ext_watermark;
		if (ctsio->io_hdr.flags & CTL_FLAG_BUS_ADDR) {
			/*
			 * XXX KDM fix this!
			 */
			panic("need to implement bus address support");
#if 0
			kern_ptr = bus_to_virt(kern_sglist[j].addr);
#endif
		} else
			kern_ptr = (uint8_t *)kern_sglist[j].addr;
		kern_ptr = kern_ptr + kern_watermark;

		kern_watermark += len_to_copy;
		ext_watermark += len_to_copy;

		if ((ctsio->io_hdr.flags & CTL_FLAG_DATA_MASK) ==
		     CTL_FLAG_DATA_IN) {
			CTL_DEBUG_PRINT(("ctl_ioctl_do_datamove: copying %d "
					 "bytes to user\n", len_to_copy));
			CTL_DEBUG_PRINT(("ctl_ioctl_do_datamove: from %p "
					 "to %p\n", kern_ptr, ext_ptr));
			if (copyout(kern_ptr, ext_ptr, len_to_copy) != 0) {
				ctl_set_internal_failure(ctsio,
							 /*sks_valid*/ 0,
							 /*retry_count*/ 0);
				goto bailout;
			}
		} else {
			CTL_DEBUG_PRINT(("ctl_ioctl_do_datamove: copying %d "
					 "bytes from user\n", len_to_copy));
			CTL_DEBUG_PRINT(("ctl_ioctl_do_datamove: from %p "
					 "to %p\n", ext_ptr, kern_ptr));
			if (copyin(ext_ptr, kern_ptr, len_to_copy)!= 0){
				ctl_set_internal_failure(ctsio,
							 /*sks_valid*/ 0,
							 /*retry_count*/0);
				goto bailout;
			}
		}

		len_copied += len_to_copy;

		if (ext_sglist[i].len == ext_watermark) {
			i++;
			ext_watermark = 0;
		}

		if (kern_sglist[j].len == kern_watermark) {
			j++;
			kern_watermark = 0;
		}
	}

	ctsio->ext_data_filled += len_copied;

	CTL_DEBUG_PRINT(("ctl_ioctl_do_datamove: ext_sg_entries: %d, "
			 "kern_sg_entries: %d\n", ext_sg_entries,
			 kern_sg_entries));
	CTL_DEBUG_PRINT(("ctl_ioctl_do_datamove: ext_data_len = %d, "
			 "kern_data_len = %d\n", ctsio->ext_data_len,
			 ctsio->kern_data_len));


	/* XXX KDM set residual?? */
bailout:

	if (ext_sglist_malloced != 0)
		free(ext_sglist, M_CTL);

	return (CTL_RETVAL_COMPLETE);
}

/*
 * Serialize a command that went down the "wrong" side, and so was sent to
 * this controller for execution.  The logic is a little different than the
 * standard case in ctl_scsiio_precheck().  Errors in this case need to get
 * sent back to the other side, but in the success case, we execute the
 * command on this side (XFER mode) or tell the other side to execute it
 * (SER_ONLY mode).
 */
static int
ctl_serialize_other_sc_cmd(struct ctl_scsiio *ctsio)
{
	struct ctl_softc *ctl_softc;
	union ctl_ha_msg msg_info;
	struct ctl_lun *lun;
	int retval = 0;
	uint32_t targ_lun;

	ctl_softc = control_softc;

	targ_lun = ctsio->io_hdr.nexus.targ_mapped_lun;
	lun = ctl_softc->ctl_luns[targ_lun];
	if (lun==NULL)
	{
		/*
		 * Why isn't LUN defined? The other side wouldn't
		 * send a cmd if the LUN is undefined.
		 */
		printf("%s: Bad JUJU!, LUN is NULL!\n", __func__);

		/* "Logical unit not supported" */
		ctl_set_sense_data(&msg_info.scsi.sense_data,
				   lun,
				   /*sense_format*/SSD_TYPE_NONE,
				   /*current_error*/ 1,
				   /*sense_key*/ SSD_KEY_ILLEGAL_REQUEST,
				   /*asc*/ 0x25,
				   /*ascq*/ 0x00,
				   SSD_ELEM_NONE);

		msg_info.scsi.sense_len = SSD_FULL_SIZE;
		msg_info.scsi.scsi_status = SCSI_STATUS_CHECK_COND;
		msg_info.hdr.status = CTL_SCSI_ERROR | CTL_AUTOSENSE;
		msg_info.hdr.original_sc = ctsio->io_hdr.original_sc;
		msg_info.hdr.serializing_sc = NULL;
		msg_info.hdr.msg_type = CTL_MSG_BAD_JUJU;
	        if (ctl_ha_msg_send(CTL_HA_CHAN_CTL, &msg_info,
				sizeof(msg_info), 0 ) > CTL_HA_STATUS_SUCCESS) {
		}
		return(1);

	}

	mtx_lock(&lun->lun_lock);
    	TAILQ_INSERT_TAIL(&lun->ooa_queue, &ctsio->io_hdr, ooa_links);

	switch (ctl_check_ooa(lun, (union ctl_io *)ctsio,
		(union ctl_io *)TAILQ_PREV(&ctsio->io_hdr, ctl_ooaq,
		 ooa_links))) {
	case CTL_ACTION_BLOCK:
		ctsio->io_hdr.flags |= CTL_FLAG_BLOCKED;
		TAILQ_INSERT_TAIL(&lun->blocked_queue, &ctsio->io_hdr,
				  blocked_links);
		break;
	case CTL_ACTION_PASS:
	case CTL_ACTION_SKIP:
		if (ctl_softc->ha_mode == CTL_HA_MODE_XFER) {
			ctsio->io_hdr.flags |= CTL_FLAG_IS_WAS_ON_RTR;
			ctl_enqueue_rtr((union ctl_io *)ctsio);
		} else {

			/* send msg back to other side */
			msg_info.hdr.original_sc = ctsio->io_hdr.original_sc;
			msg_info.hdr.serializing_sc = (union ctl_io *)ctsio;
			msg_info.hdr.msg_type = CTL_MSG_R2R;
#if 0
			printf("2. pOrig %x\n", (int)msg_info.hdr.original_sc);
#endif
		        if (ctl_ha_msg_send(CTL_HA_CHAN_CTL, &msg_info,
			    sizeof(msg_info), 0 ) > CTL_HA_STATUS_SUCCESS) {
			}
		}
		break;
	case CTL_ACTION_OVERLAP:
		/* OVERLAPPED COMMANDS ATTEMPTED */
		ctl_set_sense_data(&msg_info.scsi.sense_data,
				   lun,
				   /*sense_format*/SSD_TYPE_NONE,
				   /*current_error*/ 1,
				   /*sense_key*/ SSD_KEY_ILLEGAL_REQUEST,
				   /*asc*/ 0x4E,
				   /*ascq*/ 0x00,
				   SSD_ELEM_NONE);

		msg_info.scsi.sense_len = SSD_FULL_SIZE;
		msg_info.scsi.scsi_status = SCSI_STATUS_CHECK_COND;
		msg_info.hdr.status = CTL_SCSI_ERROR | CTL_AUTOSENSE;
		msg_info.hdr.original_sc = ctsio->io_hdr.original_sc;
		msg_info.hdr.serializing_sc = NULL;
		msg_info.hdr.msg_type = CTL_MSG_BAD_JUJU;
#if 0
		printf("BAD JUJU:Major Bummer Overlap\n");
#endif
		TAILQ_REMOVE(&lun->ooa_queue, &ctsio->io_hdr, ooa_links);
		retval = 1;
		if (ctl_ha_msg_send(CTL_HA_CHAN_CTL, &msg_info,
		    sizeof(msg_info), 0 ) > CTL_HA_STATUS_SUCCESS) {
		}
		break;
	case CTL_ACTION_OVERLAP_TAG:
		/* TAGGED OVERLAPPED COMMANDS (NN = QUEUE TAG) */
		ctl_set_sense_data(&msg_info.scsi.sense_data,
				   lun,
				   /*sense_format*/SSD_TYPE_NONE,
				   /*current_error*/ 1,
				   /*sense_key*/ SSD_KEY_ILLEGAL_REQUEST,
				   /*asc*/ 0x4D,
				   /*ascq*/ ctsio->tag_num & 0xff,
				   SSD_ELEM_NONE);

		msg_info.scsi.sense_len = SSD_FULL_SIZE;
		msg_info.scsi.scsi_status = SCSI_STATUS_CHECK_COND;
		msg_info.hdr.status = CTL_SCSI_ERROR | CTL_AUTOSENSE;
		msg_info.hdr.original_sc = ctsio->io_hdr.original_sc;
		msg_info.hdr.serializing_sc = NULL;
		msg_info.hdr.msg_type = CTL_MSG_BAD_JUJU;
#if 0
		printf("BAD JUJU:Major Bummer Overlap Tag\n");
#endif
		TAILQ_REMOVE(&lun->ooa_queue, &ctsio->io_hdr, ooa_links);
		retval = 1;
		if (ctl_ha_msg_send(CTL_HA_CHAN_CTL, &msg_info,
		    sizeof(msg_info), 0 ) > CTL_HA_STATUS_SUCCESS) {
		}
		break;
	case CTL_ACTION_ERROR:
	default:
		/* "Internal target failure" */
		ctl_set_sense_data(&msg_info.scsi.sense_data,
				   lun,
				   /*sense_format*/SSD_TYPE_NONE,
				   /*current_error*/ 1,
				   /*sense_key*/ SSD_KEY_HARDWARE_ERROR,
				   /*asc*/ 0x44,
				   /*ascq*/ 0x00,
				   SSD_ELEM_NONE);

		msg_info.scsi.sense_len = SSD_FULL_SIZE;
		msg_info.scsi.scsi_status = SCSI_STATUS_CHECK_COND;
		msg_info.hdr.status = CTL_SCSI_ERROR | CTL_AUTOSENSE;
		msg_info.hdr.original_sc = ctsio->io_hdr.original_sc;
		msg_info.hdr.serializing_sc = NULL;
		msg_info.hdr.msg_type = CTL_MSG_BAD_JUJU;
#if 0
		printf("BAD JUJU:Major Bummer HW Error\n");
#endif
		TAILQ_REMOVE(&lun->ooa_queue, &ctsio->io_hdr, ooa_links);
		retval = 1;
		if (ctl_ha_msg_send(CTL_HA_CHAN_CTL, &msg_info,
		    sizeof(msg_info), 0 ) > CTL_HA_STATUS_SUCCESS) {
		}
		break;
	}
	mtx_unlock(&lun->lun_lock);
	return (retval);
}

static int
ctl_ioctl_submit_wait(union ctl_io *io)
{
	struct ctl_fe_ioctl_params params;
	ctl_fe_ioctl_state last_state;
	int done, retval;

	retval = 0;

	bzero(&params, sizeof(params));

	mtx_init(&params.ioctl_mtx, "ctliocmtx", NULL, MTX_DEF);
	cv_init(&params.sem, "ctlioccv");
	params.state = CTL_IOCTL_INPROG;
	last_state = params.state;

	io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = &params;

	CTL_DEBUG_PRINT(("ctl_ioctl_submit_wait\n"));

	/* This shouldn't happen */
	if ((retval = ctl_queue(io)) != CTL_RETVAL_COMPLETE)
		return (retval);

	done = 0;

	do {
		mtx_lock(&params.ioctl_mtx);
		/*
		 * Check the state here, and don't sleep if the state has
		 * already changed (i.e. wakeup has already occured, but we
		 * weren't waiting yet).
		 */
		if (params.state == last_state) {
			/* XXX KDM cv_wait_sig instead? */
			cv_wait(&params.sem, &params.ioctl_mtx);
		}
		last_state = params.state;

		switch (params.state) {
		case CTL_IOCTL_INPROG:
			/* Why did we wake up? */
			/* XXX KDM error here? */
			mtx_unlock(&params.ioctl_mtx);
			break;
		case CTL_IOCTL_DATAMOVE:
			CTL_DEBUG_PRINT(("got CTL_IOCTL_DATAMOVE\n"));

			/*
			 * change last_state back to INPROG to avoid
			 * deadlock on subsequent data moves.
			 */
			params.state = last_state = CTL_IOCTL_INPROG;

			mtx_unlock(&params.ioctl_mtx);
			ctl_ioctl_do_datamove(&io->scsiio);
			/*
			 * Note that in some cases, most notably writes,
			 * this will queue the I/O and call us back later.
			 * In other cases, generally reads, this routine
			 * will immediately call back and wake us up,
			 * probably using our own context.
			 */
			io->scsiio.be_move_done(io);
			break;
		case CTL_IOCTL_DONE:
			mtx_unlock(&params.ioctl_mtx);
			CTL_DEBUG_PRINT(("got CTL_IOCTL_DONE\n"));
			done = 1;
			break;
		default:
			mtx_unlock(&params.ioctl_mtx);
			/* XXX KDM error here? */
			break;
		}
	} while (done == 0);

	mtx_destroy(&params.ioctl_mtx);
	cv_destroy(&params.sem);

	return (CTL_RETVAL_COMPLETE);
}

static void
ctl_ioctl_datamove(union ctl_io *io)
{
	struct ctl_fe_ioctl_params *params;

	params = (struct ctl_fe_ioctl_params *)
		io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;

	mtx_lock(&params->ioctl_mtx);
	params->state = CTL_IOCTL_DATAMOVE;
	cv_broadcast(&params->sem);
	mtx_unlock(&params->ioctl_mtx);
}

static void
ctl_ioctl_done(union ctl_io *io)
{
	struct ctl_fe_ioctl_params *params;

	params = (struct ctl_fe_ioctl_params *)
		io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;

	mtx_lock(&params->ioctl_mtx);
	params->state = CTL_IOCTL_DONE;
	cv_broadcast(&params->sem);
	mtx_unlock(&params->ioctl_mtx);
}

static void
ctl_ioctl_hard_startstop_callback(void *arg, struct cfi_metatask *metatask)
{
	struct ctl_fe_ioctl_startstop_info *sd_info;

	sd_info = (struct ctl_fe_ioctl_startstop_info *)arg;

	sd_info->hs_info.status = metatask->status;
	sd_info->hs_info.total_luns = metatask->taskinfo.startstop.total_luns;
	sd_info->hs_info.luns_complete =
		metatask->taskinfo.startstop.luns_complete;
	sd_info->hs_info.luns_failed = metatask->taskinfo.startstop.luns_failed;

	cv_broadcast(&sd_info->sem);
}

static void
ctl_ioctl_bbrread_callback(void *arg, struct cfi_metatask *metatask)
{
	struct ctl_fe_ioctl_bbrread_info *fe_bbr_info;

	fe_bbr_info = (struct ctl_fe_ioctl_bbrread_info *)arg;

	mtx_lock(fe_bbr_info->lock);
	fe_bbr_info->bbr_info->status = metatask->status;
	fe_bbr_info->bbr_info->bbr_status = metatask->taskinfo.bbrread.status;
	fe_bbr_info->wakeup_done = 1;
	mtx_unlock(fe_bbr_info->lock);

	cv_broadcast(&fe_bbr_info->sem);
}

/*
 * Returns 0 for success, errno for failure.
 */
static int
ctl_ioctl_fill_ooa(struct ctl_lun *lun, uint32_t *cur_fill_num,
		   struct ctl_ooa *ooa_hdr, struct ctl_ooa_entry *kern_entries)
{
	union ctl_io *io;
	int retval;

	retval = 0;

	mtx_lock(&lun->lun_lock);
	for (io = (union ctl_io *)TAILQ_FIRST(&lun->ooa_queue); (io != NULL);
	     (*cur_fill_num)++, io = (union ctl_io *)TAILQ_NEXT(&io->io_hdr,
	     ooa_links)) {
		struct ctl_ooa_entry *entry;

		/*
		 * If we've got more than we can fit, just count the
		 * remaining entries.
		 */
		if (*cur_fill_num >= ooa_hdr->alloc_num)
			continue;

		entry = &kern_entries[*cur_fill_num];

		entry->tag_num = io->scsiio.tag_num;
		entry->lun_num = lun->lun;
#ifdef CTL_TIME_IO
		entry->start_bt = io->io_hdr.start_bt;
#endif
		bcopy(io->scsiio.cdb, entry->cdb, io->scsiio.cdb_len);
		entry->cdb_len = io->scsiio.cdb_len;
		if (io->io_hdr.flags & CTL_FLAG_BLOCKED)
			entry->cmd_flags |= CTL_OOACMD_FLAG_BLOCKED;

		if (io->io_hdr.flags & CTL_FLAG_DMA_INPROG)
			entry->cmd_flags |= CTL_OOACMD_FLAG_DMA;

		if (io->io_hdr.flags & CTL_FLAG_ABORT)
			entry->cmd_flags |= CTL_OOACMD_FLAG_ABORT;

		if (io->io_hdr.flags & CTL_FLAG_IS_WAS_ON_RTR)
			entry->cmd_flags |= CTL_OOACMD_FLAG_RTR;

		if (io->io_hdr.flags & CTL_FLAG_DMA_QUEUED)
			entry->cmd_flags |= CTL_OOACMD_FLAG_DMA_QUEUED;
	}
	mtx_unlock(&lun->lun_lock);

	return (retval);
}

static void *
ctl_copyin_alloc(void *user_addr, int len, char *error_str,
		 size_t error_str_len)
{
	void *kptr;

	kptr = malloc(len, M_CTL, M_WAITOK | M_ZERO);

	if (copyin(user_addr, kptr, len) != 0) {
		snprintf(error_str, error_str_len, "Error copying %d bytes "
			 "from user address %p to kernel address %p", len,
			 user_addr, kptr);
		free(kptr, M_CTL);
		return (NULL);
	}

	return (kptr);
}

static void
ctl_free_args(int num_args, struct ctl_be_arg *args)
{
	int i;

	if (args == NULL)
		return;

	for (i = 0; i < num_args; i++) {
		free(args[i].kname, M_CTL);
		free(args[i].kvalue, M_CTL);
	}

	free(args, M_CTL);
}

static struct ctl_be_arg *
ctl_copyin_args(int num_args, struct ctl_be_arg *uargs,
		char *error_str, size_t error_str_len)
{
	struct ctl_be_arg *args;
	int i;

	args = ctl_copyin_alloc(uargs, num_args * sizeof(*args),
				error_str, error_str_len);

	if (args == NULL)
		goto bailout;

	for (i = 0; i < num_args; i++) {
		args[i].kname = NULL;
		args[i].kvalue = NULL;
	}

	for (i = 0; i < num_args; i++) {
		uint8_t *tmpptr;

		args[i].kname = ctl_copyin_alloc(args[i].name,
			args[i].namelen, error_str, error_str_len);
		if (args[i].kname == NULL)
			goto bailout;

		if (args[i].kname[args[i].namelen - 1] != '\0') {
			snprintf(error_str, error_str_len, "Argument %d "
				 "name is not NUL-terminated", i);
			goto bailout;
		}

		if (args[i].flags & CTL_BEARG_RD) {
			tmpptr = ctl_copyin_alloc(args[i].value,
				args[i].vallen, error_str, error_str_len);
			if (tmpptr == NULL)
				goto bailout;
			if ((args[i].flags & CTL_BEARG_ASCII)
			 && (tmpptr[args[i].vallen - 1] != '\0')) {
				snprintf(error_str, error_str_len, "Argument "
				    "%d value is not NUL-terminated", i);
				goto bailout;
			}
			args[i].kvalue = tmpptr;
		} else {
			args[i].kvalue = malloc(args[i].vallen,
			    M_CTL, M_WAITOK | M_ZERO);
		}
	}

	return (args);
bailout:

	ctl_free_args(num_args, args);

	return (NULL);
}

static void
ctl_copyout_args(int num_args, struct ctl_be_arg *args)
{
	int i;

	for (i = 0; i < num_args; i++) {
		if (args[i].flags & CTL_BEARG_WR)
			copyout(args[i].kvalue, args[i].value, args[i].vallen);
	}
}

/*
 * Escape characters that are illegal or not recommended in XML.
 */
int
ctl_sbuf_printf_esc(struct sbuf *sb, char *str)
{
	int retval;

	retval = 0;

	for (; *str; str++) {
		switch (*str) {
		case '&':
			retval = sbuf_printf(sb, "&amp;");
			break;
		case '>':
			retval = sbuf_printf(sb, "&gt;");
			break;
		case '<':
			retval = sbuf_printf(sb, "&lt;");
			break;
		default:
			retval = sbuf_putc(sb, *str);
			break;
		}

		if (retval != 0)
			break;

	}

	return (retval);
}

static int
ctl_ioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag,
	  struct thread *td)
{
	struct ctl_softc *softc;
	int retval;

	softc = control_softc;

	retval = 0;

	switch (cmd) {
	case CTL_IO: {
		union ctl_io *io;
		void *pool_tmp;

		/*
		 * If we haven't been "enabled", don't allow any SCSI I/O
		 * to this FETD.
		 */
		if ((softc->ioctl_info.flags & CTL_IOCTL_FLAG_ENABLED) == 0) {
			retval = EPERM;
			break;
		}

		io = ctl_alloc_io(softc->ioctl_info.port.ctl_pool_ref);
		if (io == NULL) {
			printf("ctl_ioctl: can't allocate ctl_io!\n");
			retval = ENOSPC;
			break;
		}

		/*
		 * Need to save the pool reference so it doesn't get
		 * spammed by the user's ctl_io.
		 */
		pool_tmp = io->io_hdr.pool;

		memcpy(io, (void *)addr, sizeof(*io));

		io->io_hdr.pool = pool_tmp;
		/*
		 * No status yet, so make sure the status is set properly.
		 */
		io->io_hdr.status = CTL_STATUS_NONE;

		/*
		 * The user sets the initiator ID, target and LUN IDs.
		 */
		io->io_hdr.nexus.targ_port = softc->ioctl_info.port.targ_port;
		io->io_hdr.flags |= CTL_FLAG_USER_REQ;
		if ((io->io_hdr.io_type == CTL_IO_SCSI)
		 && (io->scsiio.tag_type != CTL_TAG_UNTAGGED))
			io->scsiio.tag_num = softc->ioctl_info.cur_tag_num++;

		retval = ctl_ioctl_submit_wait(io);

		if (retval != 0) {
			ctl_free_io(io);
			break;
		}

		memcpy((void *)addr, io, sizeof(*io));

		/* return this to our pool */
		ctl_free_io(io);

		break;
	}
	case CTL_ENABLE_PORT:
	case CTL_DISABLE_PORT:
	case CTL_SET_PORT_WWNS: {
		struct ctl_port *port;
		struct ctl_port_entry *entry;

		entry = (struct ctl_port_entry *)addr;
		
		mtx_lock(&softc->ctl_lock);
		STAILQ_FOREACH(port, &softc->port_list, links) {
			int action, done;

			action = 0;
			done = 0;

			if ((entry->port_type == CTL_PORT_NONE)
			 && (entry->targ_port == port->targ_port)) {
				/*
				 * If the user only wants to enable or
				 * disable or set WWNs on a specific port,
				 * do the operation and we're done.
				 */
				action = 1;
				done = 1;
			} else if (entry->port_type & port->port_type) {
				/*
				 * Compare the user's type mask with the
				 * particular frontend type to see if we
				 * have a match.
				 */
				action = 1;
				done = 0;

				/*
				 * Make sure the user isn't trying to set
				 * WWNs on multiple ports at the same time.
				 */
				if (cmd == CTL_SET_PORT_WWNS) {
					printf("%s: Can't set WWNs on "
					       "multiple ports\n", __func__);
					retval = EINVAL;
					break;
				}
			}
			if (action != 0) {
				/*
				 * XXX KDM we have to drop the lock here,
				 * because the online/offline operations
				 * can potentially block.  We need to
				 * reference count the frontends so they
				 * can't go away,
				 */
				mtx_unlock(&softc->ctl_lock);

				if (cmd == CTL_ENABLE_PORT) {
					struct ctl_lun *lun;

					STAILQ_FOREACH(lun, &softc->lun_list,
						       links) {
						port->lun_enable(port->targ_lun_arg,
						    lun->target,
						    lun->lun);
					}

					ctl_port_online(port);
				} else if (cmd == CTL_DISABLE_PORT) {
					struct ctl_lun *lun;

					ctl_port_offline(port);

					STAILQ_FOREACH(lun, &softc->lun_list,
						       links) {
						port->lun_disable(
						    port->targ_lun_arg,
						    lun->target,
						    lun->lun);
					}
				}

				mtx_lock(&softc->ctl_lock);

				if (cmd == CTL_SET_PORT_WWNS)
					ctl_port_set_wwns(port,
					    (entry->flags & CTL_PORT_WWNN_VALID) ?
					    1 : 0, entry->wwnn,
					    (entry->flags & CTL_PORT_WWPN_VALID) ?
					    1 : 0, entry->wwpn);
			}
			if (done != 0)
				break;
		}
		mtx_unlock(&softc->ctl_lock);
		break;
	}
	case CTL_GET_PORT_LIST: {
		struct ctl_port *port;
		struct ctl_port_list *list;
		int i;

		list = (struct ctl_port_list *)addr;

		if (list->alloc_len != (list->alloc_num *
		    sizeof(struct ctl_port_entry))) {
			printf("%s: CTL_GET_PORT_LIST: alloc_len %u != "
			       "alloc_num %u * sizeof(struct ctl_port_entry) "
			       "%zu\n", __func__, list->alloc_len,
			       list->alloc_num, sizeof(struct ctl_port_entry));
			retval = EINVAL;
			break;
		}
		list->fill_len = 0;
		list->fill_num = 0;
		list->dropped_num = 0;
		i = 0;
		mtx_lock(&softc->ctl_lock);
		STAILQ_FOREACH(port, &softc->port_list, links) {
			struct ctl_port_entry entry, *list_entry;

			if (list->fill_num >= list->alloc_num) {
				list->dropped_num++;
				continue;
			}

			entry.port_type = port->port_type;
			strlcpy(entry.port_name, port->port_name,
				sizeof(entry.port_name));
			entry.targ_port = port->targ_port;
			entry.physical_port = port->physical_port;
			entry.virtual_port = port->virtual_port;
			entry.wwnn = port->wwnn;
			entry.wwpn = port->wwpn;
			if (port->status & CTL_PORT_STATUS_ONLINE)
				entry.online = 1;
			else
				entry.online = 0;

			list_entry = &list->entries[i];

			retval = copyout(&entry, list_entry, sizeof(entry));
			if (retval != 0) {
				printf("%s: CTL_GET_PORT_LIST: copyout "
				       "returned %d\n", __func__, retval);
				break;
			}
			i++;
			list->fill_num++;
			list->fill_len += sizeof(entry);
		}
		mtx_unlock(&softc->ctl_lock);

		/*
		 * If this is non-zero, we had a copyout fault, so there's
		 * probably no point in attempting to set the status inside
		 * the structure.
		 */
		if (retval != 0)
			break;

		if (list->dropped_num > 0)
			list->status = CTL_PORT_LIST_NEED_MORE_SPACE;
		else
			list->status = CTL_PORT_LIST_OK;
		break;
	}
	case CTL_DUMP_OOA: {
		struct ctl_lun *lun;
		union ctl_io *io;
		char printbuf[128];
		struct sbuf sb;

		mtx_lock(&softc->ctl_lock);
		printf("Dumping OOA queues:\n");
		STAILQ_FOREACH(lun, &softc->lun_list, links) {
			mtx_lock(&lun->lun_lock);
			for (io = (union ctl_io *)TAILQ_FIRST(
			     &lun->ooa_queue); io != NULL;
			     io = (union ctl_io *)TAILQ_NEXT(&io->io_hdr,
			     ooa_links)) {
				sbuf_new(&sb, printbuf, sizeof(printbuf),
					 SBUF_FIXEDLEN);
				sbuf_printf(&sb, "LUN %jd tag 0x%04x%s%s%s%s: ",
					    (intmax_t)lun->lun,
					    io->scsiio.tag_num,
					    (io->io_hdr.flags &
					    CTL_FLAG_BLOCKED) ? "" : " BLOCKED",
					    (io->io_hdr.flags &
					    CTL_FLAG_DMA_INPROG) ? " DMA" : "",
					    (io->io_hdr.flags &
					    CTL_FLAG_ABORT) ? " ABORT" : "",
			                    (io->io_hdr.flags &
		                        CTL_FLAG_IS_WAS_ON_RTR) ? " RTR" : "");
				ctl_scsi_command_string(&io->scsiio, NULL, &sb);
				sbuf_finish(&sb);
				printf("%s\n", sbuf_data(&sb));
			}
			mtx_unlock(&lun->lun_lock);
		}
		printf("OOA queues dump done\n");
		mtx_unlock(&softc->ctl_lock);
		break;
	}
	case CTL_GET_OOA: {
		struct ctl_lun *lun;
		struct ctl_ooa *ooa_hdr;
		struct ctl_ooa_entry *entries;
		uint32_t cur_fill_num;

		ooa_hdr = (struct ctl_ooa *)addr;

		if ((ooa_hdr->alloc_len == 0)
		 || (ooa_hdr->alloc_num == 0)) {
			printf("%s: CTL_GET_OOA: alloc len %u and alloc num %u "
			       "must be non-zero\n", __func__,
			       ooa_hdr->alloc_len, ooa_hdr->alloc_num);
			retval = EINVAL;
			break;
		}

		if (ooa_hdr->alloc_len != (ooa_hdr->alloc_num *
		    sizeof(struct ctl_ooa_entry))) {
			printf("%s: CTL_GET_OOA: alloc len %u must be alloc "
			       "num %d * sizeof(struct ctl_ooa_entry) %zd\n",
			       __func__, ooa_hdr->alloc_len,
			       ooa_hdr->alloc_num,sizeof(struct ctl_ooa_entry));
			retval = EINVAL;
			break;
		}

		entries = malloc(ooa_hdr->alloc_len, M_CTL, M_WAITOK | M_ZERO);
		if (entries == NULL) {
			printf("%s: could not allocate %d bytes for OOA "
			       "dump\n", __func__, ooa_hdr->alloc_len);
			retval = ENOMEM;
			break;
		}

		mtx_lock(&softc->ctl_lock);
		if (((ooa_hdr->flags & CTL_OOA_FLAG_ALL_LUNS) == 0)
		 && ((ooa_hdr->lun_num >= CTL_MAX_LUNS)
		  || (softc->ctl_luns[ooa_hdr->lun_num] == NULL))) {
			mtx_unlock(&softc->ctl_lock);
			free(entries, M_CTL);
			printf("%s: CTL_GET_OOA: invalid LUN %ju\n",
			       __func__, (uintmax_t)ooa_hdr->lun_num);
			retval = EINVAL;
			break;
		}

		cur_fill_num = 0;

		if (ooa_hdr->flags & CTL_OOA_FLAG_ALL_LUNS) {
			STAILQ_FOREACH(lun, &softc->lun_list, links) {
				retval = ctl_ioctl_fill_ooa(lun, &cur_fill_num,
					ooa_hdr, entries);
				if (retval != 0)
					break;
			}
			if (retval != 0) {
				mtx_unlock(&softc->ctl_lock);
				free(entries, M_CTL);
				break;
			}
		} else {
			lun = softc->ctl_luns[ooa_hdr->lun_num];

			retval = ctl_ioctl_fill_ooa(lun, &cur_fill_num,ooa_hdr,
						    entries);
		}
		mtx_unlock(&softc->ctl_lock);

		ooa_hdr->fill_num = min(cur_fill_num, ooa_hdr->alloc_num);
		ooa_hdr->fill_len = ooa_hdr->fill_num *
			sizeof(struct ctl_ooa_entry);
		retval = copyout(entries, ooa_hdr->entries, ooa_hdr->fill_len);
		if (retval != 0) {
			printf("%s: error copying out %d bytes for OOA dump\n", 
			       __func__, ooa_hdr->fill_len);
		}

		getbintime(&ooa_hdr->cur_bt);

		if (cur_fill_num > ooa_hdr->alloc_num) {
			ooa_hdr->dropped_num = cur_fill_num -ooa_hdr->alloc_num;
			ooa_hdr->status = CTL_OOA_NEED_MORE_SPACE;
		} else {
			ooa_hdr->dropped_num = 0;
			ooa_hdr->status = CTL_OOA_OK;
		}

		free(entries, M_CTL);
		break;
	}
	case CTL_CHECK_OOA: {
		union ctl_io *io;
		struct ctl_lun *lun;
		struct ctl_ooa_info *ooa_info;


		ooa_info = (struct ctl_ooa_info *)addr;

		if (ooa_info->lun_id >= CTL_MAX_LUNS) {
			ooa_info->status = CTL_OOA_INVALID_LUN;
			break;
		}
		mtx_lock(&softc->ctl_lock);
		lun = softc->ctl_luns[ooa_info->lun_id];
		if (lun == NULL) {
			mtx_unlock(&softc->ctl_lock);
			ooa_info->status = CTL_OOA_INVALID_LUN;
			break;
		}
		mtx_lock(&lun->lun_lock);
		mtx_unlock(&softc->ctl_lock);
		ooa_info->num_entries = 0;
		for (io = (union ctl_io *)TAILQ_FIRST(&lun->ooa_queue);
		     io != NULL; io = (union ctl_io *)TAILQ_NEXT(
		     &io->io_hdr, ooa_links)) {
			ooa_info->num_entries++;
		}
		mtx_unlock(&lun->lun_lock);

		ooa_info->status = CTL_OOA_SUCCESS;

		break;
	}
	case CTL_HARD_START:
	case CTL_HARD_STOP: {
		struct ctl_fe_ioctl_startstop_info ss_info;
		struct cfi_metatask *metatask;
		struct mtx hs_mtx;

		mtx_init(&hs_mtx, "HS Mutex", NULL, MTX_DEF);

		cv_init(&ss_info.sem, "hard start/stop cv" );

		metatask = cfi_alloc_metatask(/*can_wait*/ 1);
		if (metatask == NULL) {
			retval = ENOMEM;
			mtx_destroy(&hs_mtx);
			break;
		}

		if (cmd == CTL_HARD_START)
			metatask->tasktype = CFI_TASK_STARTUP;
		else
			metatask->tasktype = CFI_TASK_SHUTDOWN;

		metatask->callback = ctl_ioctl_hard_startstop_callback;
		metatask->callback_arg = &ss_info;

		cfi_action(metatask);

		/* Wait for the callback */
		mtx_lock(&hs_mtx);
		cv_wait_sig(&ss_info.sem, &hs_mtx);
		mtx_unlock(&hs_mtx);

		/*
		 * All information has been copied from the metatask by the
		 * time cv_broadcast() is called, so we free the metatask here.
		 */
		cfi_free_metatask(metatask);

		memcpy((void *)addr, &ss_info.hs_info, sizeof(ss_info.hs_info));

		mtx_destroy(&hs_mtx);
		break;
	}
	case CTL_BBRREAD: {
		struct ctl_bbrread_info *bbr_info;
		struct ctl_fe_ioctl_bbrread_info fe_bbr_info;
		struct mtx bbr_mtx;
		struct cfi_metatask *metatask;

		bbr_info = (struct ctl_bbrread_info *)addr;

		bzero(&fe_bbr_info, sizeof(fe_bbr_info));

		bzero(&bbr_mtx, sizeof(bbr_mtx));
		mtx_init(&bbr_mtx, "BBR Mutex", NULL, MTX_DEF);

		fe_bbr_info.bbr_info = bbr_info;
		fe_bbr_info.lock = &bbr_mtx;

		cv_init(&fe_bbr_info.sem, "BBR read cv");
		metatask = cfi_alloc_metatask(/*can_wait*/ 1);

		if (metatask == NULL) {
			mtx_destroy(&bbr_mtx);
			cv_destroy(&fe_bbr_info.sem);
			retval = ENOMEM;
			break;
		}
		metatask->tasktype = CFI_TASK_BBRREAD;
		metatask->callback = ctl_ioctl_bbrread_callback;
		metatask->callback_arg = &fe_bbr_info;
		metatask->taskinfo.bbrread.lun_num = bbr_info->lun_num;
		metatask->taskinfo.bbrread.lba = bbr_info->lba;
		metatask->taskinfo.bbrread.len = bbr_info->len;

		cfi_action(metatask);

		mtx_lock(&bbr_mtx);
		while (fe_bbr_info.wakeup_done == 0)
			cv_wait_sig(&fe_bbr_info.sem, &bbr_mtx);
		mtx_unlock(&bbr_mtx);

		bbr_info->status = metatask->status;
		bbr_info->bbr_status = metatask->taskinfo.bbrread.status;
		bbr_info->scsi_status = metatask->taskinfo.bbrread.scsi_status;
		memcpy(&bbr_info->sense_data,
		       &metatask->taskinfo.bbrread.sense_data,
		       ctl_min(sizeof(bbr_info->sense_data),
			       sizeof(metatask->taskinfo.bbrread.sense_data)));

		cfi_free_metatask(metatask);

		mtx_destroy(&bbr_mtx);
		cv_destroy(&fe_bbr_info.sem);

		break;
	}
	case CTL_DELAY_IO: {
		struct ctl_io_delay_info *delay_info;
#ifdef CTL_IO_DELAY
		struct ctl_lun *lun;
#endif /* CTL_IO_DELAY */

		delay_info = (struct ctl_io_delay_info *)addr;

#ifdef CTL_IO_DELAY
		mtx_lock(&softc->ctl_lock);

		if ((delay_info->lun_id >= CTL_MAX_LUNS)
		 || (softc->ctl_luns[delay_info->lun_id] == NULL)) {
			delay_info->status = CTL_DELAY_STATUS_INVALID_LUN;
		} else {
			lun = softc->ctl_luns[delay_info->lun_id];
			mtx_lock(&lun->lun_lock);

			delay_info->status = CTL_DELAY_STATUS_OK;

			switch (delay_info->delay_type) {
			case CTL_DELAY_TYPE_CONT:
				break;
			case CTL_DELAY_TYPE_ONESHOT:
				break;
			default:
				delay_info->status =
					CTL_DELAY_STATUS_INVALID_TYPE;
				break;
			}

			switch (delay_info->delay_loc) {
			case CTL_DELAY_LOC_DATAMOVE:
				lun->delay_info.datamove_type =
					delay_info->delay_type;
				lun->delay_info.datamove_delay =
					delay_info->delay_secs;
				break;
			case CTL_DELAY_LOC_DONE:
				lun->delay_info.done_type =
					delay_info->delay_type;
				lun->delay_info.done_delay =
					delay_info->delay_secs;
				break;
			default:
				delay_info->status =
					CTL_DELAY_STATUS_INVALID_LOC;
				break;
			}
			mtx_unlock(&lun->lun_lock);
		}

		mtx_unlock(&softc->ctl_lock);
#else
		delay_info->status = CTL_DELAY_STATUS_NOT_IMPLEMENTED;
#endif /* CTL_IO_DELAY */
		break;
	}
	case CTL_REALSYNC_SET: {
		int *syncstate;

		syncstate = (int *)addr;

		mtx_lock(&softc->ctl_lock);
		switch (*syncstate) {
		case 0:
			softc->flags &= ~CTL_FLAG_REAL_SYNC;
			break;
		case 1:
			softc->flags |= CTL_FLAG_REAL_SYNC;
			break;
		default:
			retval = EINVAL;
			break;
		}
		mtx_unlock(&softc->ctl_lock);
		break;
	}
	case CTL_REALSYNC_GET: {
		int *syncstate;

		syncstate = (int*)addr;

		mtx_lock(&softc->ctl_lock);
		if (softc->flags & CTL_FLAG_REAL_SYNC)
			*syncstate = 1;
		else
			*syncstate = 0;
		mtx_unlock(&softc->ctl_lock);

		break;
	}
	case CTL_SETSYNC:
	case CTL_GETSYNC: {
		struct ctl_sync_info *sync_info;
		struct ctl_lun *lun;

		sync_info = (struct ctl_sync_info *)addr;

		mtx_lock(&softc->ctl_lock);
		lun = softc->ctl_luns[sync_info->lun_id];
		if (lun == NULL) {
			mtx_unlock(&softc->ctl_lock);
			sync_info->status = CTL_GS_SYNC_NO_LUN;
		}
		/*
		 * Get or set the sync interval.  We're not bounds checking
		 * in the set case, hopefully the user won't do something
		 * silly.
		 */
		mtx_lock(&lun->lun_lock);
		mtx_unlock(&softc->ctl_lock);
		if (cmd == CTL_GETSYNC)
			sync_info->sync_interval = lun->sync_interval;
		else
			lun->sync_interval = sync_info->sync_interval;
		mtx_unlock(&lun->lun_lock);

		sync_info->status = CTL_GS_SYNC_OK;

		break;
	}
	case CTL_GETSTATS: {
		struct ctl_stats *stats;
		struct ctl_lun *lun;
		int i;

		stats = (struct ctl_stats *)addr;

		if ((sizeof(struct ctl_lun_io_stats) * softc->num_luns) >
		     stats->alloc_len) {
			stats->status = CTL_SS_NEED_MORE_SPACE;
			stats->num_luns = softc->num_luns;
			break;
		}
		/*
		 * XXX KDM no locking here.  If the LUN list changes,
		 * things can blow up.
		 */
		for (i = 0, lun = STAILQ_FIRST(&softc->lun_list); lun != NULL;
		     i++, lun = STAILQ_NEXT(lun, links)) {
			retval = copyout(&lun->stats, &stats->lun_stats[i],
					 sizeof(lun->stats));
			if (retval != 0)
				break;
		}
		stats->num_luns = softc->num_luns;
		stats->fill_len = sizeof(struct ctl_lun_io_stats) *
				 softc->num_luns;
		stats->status = CTL_SS_OK;
#ifdef CTL_TIME_IO
		stats->flags = CTL_STATS_FLAG_TIME_VALID;
#else
		stats->flags = CTL_STATS_FLAG_NONE;
#endif
		getnanouptime(&stats->timestamp);
		break;
	}
	case CTL_ERROR_INJECT: {
		struct ctl_error_desc *err_desc, *new_err_desc;
		struct ctl_lun *lun;

		err_desc = (struct ctl_error_desc *)addr;

		new_err_desc = malloc(sizeof(*new_err_desc), M_CTL,
				      M_WAITOK | M_ZERO);
		bcopy(err_desc, new_err_desc, sizeof(*new_err_desc));

		mtx_lock(&softc->ctl_lock);
		lun = softc->ctl_luns[err_desc->lun_id];
		if (lun == NULL) {
			mtx_unlock(&softc->ctl_lock);
			free(new_err_desc, M_CTL);
			printf("%s: CTL_ERROR_INJECT: invalid LUN %ju\n",
			       __func__, (uintmax_t)err_desc->lun_id);
			retval = EINVAL;
			break;
		}
		mtx_lock(&lun->lun_lock);
		mtx_unlock(&softc->ctl_lock);

		/*
		 * We could do some checking here to verify the validity
		 * of the request, but given the complexity of error
		 * injection requests, the checking logic would be fairly
		 * complex.
		 *
		 * For now, if the request is invalid, it just won't get
		 * executed and might get deleted.
		 */
		STAILQ_INSERT_TAIL(&lun->error_list, new_err_desc, links);

		/*
		 * XXX KDM check to make sure the serial number is unique,
		 * in case we somehow manage to wrap.  That shouldn't
		 * happen for a very long time, but it's the right thing to
		 * do.
		 */
		new_err_desc->serial = lun->error_serial;
		err_desc->serial = lun->error_serial;
		lun->error_serial++;

		mtx_unlock(&lun->lun_lock);
		break;
	}
	case CTL_ERROR_INJECT_DELETE: {
		struct ctl_error_desc *delete_desc, *desc, *desc2;
		struct ctl_lun *lun;
		int delete_done;

		delete_desc = (struct ctl_error_desc *)addr;
		delete_done = 0;

		mtx_lock(&softc->ctl_lock);
		lun = softc->ctl_luns[delete_desc->lun_id];
		if (lun == NULL) {
			mtx_unlock(&softc->ctl_lock);
			printf("%s: CTL_ERROR_INJECT_DELETE: invalid LUN %ju\n",
			       __func__, (uintmax_t)delete_desc->lun_id);
			retval = EINVAL;
			break;
		}
		mtx_lock(&lun->lun_lock);
		mtx_unlock(&softc->ctl_lock);
		STAILQ_FOREACH_SAFE(desc, &lun->error_list, links, desc2) {
			if (desc->serial != delete_desc->serial)
				continue;

			STAILQ_REMOVE(&lun->error_list, desc, ctl_error_desc,
				      links);
			free(desc, M_CTL);
			delete_done = 1;
		}
		mtx_unlock(&lun->lun_lock);
		if (delete_done == 0) {
			printf("%s: CTL_ERROR_INJECT_DELETE: can't find "
			       "error serial %ju on LUN %u\n", __func__, 
			       delete_desc->serial, delete_desc->lun_id);
			retval = EINVAL;
			break;
		}
		break;
	}
	case CTL_DUMP_STRUCTS: {
		int i, j, k, idx;
		struct ctl_port *port;
		struct ctl_frontend *fe;

		mtx_lock(&softc->ctl_lock);
		printf("CTL Persistent Reservation information start:\n");
		for (i = 0; i < CTL_MAX_LUNS; i++) {
			struct ctl_lun *lun;

			lun = softc->ctl_luns[i];

			if ((lun == NULL)
			 || ((lun->flags & CTL_LUN_DISABLED) != 0))
				continue;

			for (j = 0; j < (CTL_MAX_PORTS * 2); j++) {
				for (k = 0; k < CTL_MAX_INIT_PER_PORT; k++){
					idx = j * CTL_MAX_INIT_PER_PORT + k;
					if (lun->per_res[idx].registered == 0)
						continue;
					printf("  LUN %d port %d iid %d key "
					       "%#jx\n", i, j, k,
					       (uintmax_t)scsi_8btou64(
					       lun->per_res[idx].res_key.key));
				}
			}
		}
		printf("CTL Persistent Reservation information end\n");
		printf("CTL Ports:\n");
		STAILQ_FOREACH(port, &softc->port_list, links) {
			printf("  Port %d '%s' Frontend '%s' Type %u pp %d vp %d WWNN "
			       "%#jx WWPN %#jx\n", port->targ_port, port->port_name,
			       port->frontend->name, port->port_type,
			       port->physical_port, port->virtual_port,
			       (uintmax_t)port->wwnn, (uintmax_t)port->wwpn);
			for (j = 0; j < CTL_MAX_INIT_PER_PORT; j++) {
				if (port->wwpn_iid[j].in_use == 0 &&
				    port->wwpn_iid[j].wwpn == 0 &&
				    port->wwpn_iid[j].name == NULL)
					continue;

				printf("    iid %u use %d WWPN %#jx '%s'\n",
				    j, port->wwpn_iid[j].in_use,
				    (uintmax_t)port->wwpn_iid[j].wwpn,
				    port->wwpn_iid[j].name);
			}
		}
		printf("CTL Port information end\n");
		mtx_unlock(&softc->ctl_lock);
		/*
		 * XXX KDM calling this without a lock.  We'd likely want
		 * to drop the lock before calling the frontend's dump
		 * routine anyway.
		 */
		printf("CTL Frontends:\n");
		STAILQ_FOREACH(fe, &softc->fe_list, links) {
			printf("  Frontend '%s'\n", fe->name);
			if (fe->fe_dump != NULL)
				fe->fe_dump();
		}
		printf("CTL Frontend information end\n");
		break;
	}
	case CTL_LUN_REQ: {
		struct ctl_lun_req *lun_req;
		struct ctl_backend_driver *backend;

		lun_req = (struct ctl_lun_req *)addr;

		backend = ctl_backend_find(lun_req->backend);
		if (backend == NULL) {
			lun_req->status = CTL_LUN_ERROR;
			snprintf(lun_req->error_str,
				 sizeof(lun_req->error_str),
				 "Backend \"%s\" not found.",
				 lun_req->backend);
			break;
		}
		if (lun_req->num_be_args > 0) {
			lun_req->kern_be_args = ctl_copyin_args(
				lun_req->num_be_args,
				lun_req->be_args,
				lun_req->error_str,
				sizeof(lun_req->error_str));
			if (lun_req->kern_be_args == NULL) {
				lun_req->status = CTL_LUN_ERROR;
				break;
			}
		}

		retval = backend->ioctl(dev, cmd, addr, flag, td);

		if (lun_req->num_be_args > 0) {
			ctl_copyout_args(lun_req->num_be_args,
				      lun_req->kern_be_args);
			ctl_free_args(lun_req->num_be_args,
				      lun_req->kern_be_args);
		}
		break;
	}
	case CTL_LUN_LIST: {
		struct sbuf *sb;
		struct ctl_lun *lun;
		struct ctl_lun_list *list;
		struct ctl_option *opt;

		list = (struct ctl_lun_list *)addr;

		/*
		 * Allocate a fixed length sbuf here, based on the length
		 * of the user's buffer.  We could allocate an auto-extending
		 * buffer, and then tell the user how much larger our
		 * amount of data is than his buffer, but that presents
		 * some problems:
		 *
		 * 1.  The sbuf(9) routines use a blocking malloc, and so
		 *     we can't hold a lock while calling them with an
		 *     auto-extending buffer.
 		 *
		 * 2.  There is not currently a LUN reference counting
		 *     mechanism, outside of outstanding transactions on
		 *     the LUN's OOA queue.  So a LUN could go away on us
		 *     while we're getting the LUN number, backend-specific
		 *     information, etc.  Thus, given the way things
		 *     currently work, we need to hold the CTL lock while
		 *     grabbing LUN information.
		 *
		 * So, from the user's standpoint, the best thing to do is
		 * allocate what he thinks is a reasonable buffer length,
		 * and then if he gets a CTL_LUN_LIST_NEED_MORE_SPACE error,
		 * double the buffer length and try again.  (And repeat
		 * that until he succeeds.)
		 */
		sb = sbuf_new(NULL, NULL, list->alloc_len, SBUF_FIXEDLEN);
		if (sb == NULL) {
			list->status = CTL_LUN_LIST_ERROR;
			snprintf(list->error_str, sizeof(list->error_str),
				 "Unable to allocate %d bytes for LUN list",
				 list->alloc_len);
			break;
		}

		sbuf_printf(sb, "<ctllunlist>\n");

		mtx_lock(&softc->ctl_lock);
		STAILQ_FOREACH(lun, &softc->lun_list, links) {
			mtx_lock(&lun->lun_lock);
			retval = sbuf_printf(sb, "<lun id=\"%ju\">\n",
					     (uintmax_t)lun->lun);

			/*
			 * Bail out as soon as we see that we've overfilled
			 * the buffer.
			 */
			if (retval != 0)
				break;

			retval = sbuf_printf(sb, "\t<backend_type>%s"
					     "</backend_type>\n",
					     (lun->backend == NULL) ?  "none" :
					     lun->backend->name);

			if (retval != 0)
				break;

			retval = sbuf_printf(sb, "\t<lun_type>%d</lun_type>\n",
					     lun->be_lun->lun_type);

			if (retval != 0)
				break;

			if (lun->backend == NULL) {
				retval = sbuf_printf(sb, "</lun>\n");
				if (retval != 0)
					break;
				continue;
			}

			retval = sbuf_printf(sb, "\t<size>%ju</size>\n",
					     (lun->be_lun->maxlba > 0) ?
					     lun->be_lun->maxlba + 1 : 0);

			if (retval != 0)
				break;

			retval = sbuf_printf(sb, "\t<blocksize>%u</blocksize>\n",
					     lun->be_lun->blocksize);

			if (retval != 0)
				break;

			retval = sbuf_printf(sb, "\t<serial_number>");

			if (retval != 0)
				break;

			retval = ctl_sbuf_printf_esc(sb,
						     lun->be_lun->serial_num);

			if (retval != 0)
				break;

			retval = sbuf_printf(sb, "</serial_number>\n");
		
			if (retval != 0)
				break;

			retval = sbuf_printf(sb, "\t<device_id>");

			if (retval != 0)
				break;

			retval = ctl_sbuf_printf_esc(sb,lun->be_lun->device_id);

			if (retval != 0)
				break;

			retval = sbuf_printf(sb, "</device_id>\n");

			if (retval != 0)
				break;

			if (lun->backend->lun_info != NULL) {
				retval = lun->backend->lun_info(lun->be_lun->be_lun, sb);
				if (retval != 0)
					break;
			}
			STAILQ_FOREACH(opt, &lun->be_lun->options, links) {
				retval = sbuf_printf(sb, "\t<%s>%s</%s>\n",
				    opt->name, opt->value, opt->name);
				if (retval != 0)
					break;
			}

			retval = sbuf_printf(sb, "</lun>\n");

			if (retval != 0)
				break;
			mtx_unlock(&lun->lun_lock);
		}
		if (lun != NULL)
			mtx_unlock(&lun->lun_lock);
		mtx_unlock(&softc->ctl_lock);

		if ((retval != 0)
		 || ((retval = sbuf_printf(sb, "</ctllunlist>\n")) != 0)) {
			retval = 0;
			sbuf_delete(sb);
			list->status = CTL_LUN_LIST_NEED_MORE_SPACE;
			snprintf(list->error_str, sizeof(list->error_str),
				 "Out of space, %d bytes is too small",
				 list->alloc_len);
			break;
		}

		sbuf_finish(sb);

		retval = copyout(sbuf_data(sb), list->lun_xml,
				 sbuf_len(sb) + 1);

		list->fill_len = sbuf_len(sb) + 1;
		list->status = CTL_LUN_LIST_OK;
		sbuf_delete(sb);
		break;
	}
	case CTL_ISCSI: {
		struct ctl_iscsi *ci;
		struct ctl_frontend *fe;

		ci = (struct ctl_iscsi *)addr;

		fe = ctl_frontend_find("iscsi");
		if (fe == NULL) {
			ci->status = CTL_ISCSI_ERROR;
			snprintf(ci->error_str, sizeof(ci->error_str),
			    "Frontend \"iscsi\" not found.");
			break;
		}

		retval = fe->ioctl(dev, cmd, addr, flag, td);
		break;
	}
	case CTL_PORT_REQ: {
		struct ctl_req *req;
		struct ctl_frontend *fe;

		req = (struct ctl_req *)addr;

		fe = ctl_frontend_find(req->driver);
		if (fe == NULL) {
			req->status = CTL_LUN_ERROR;
			snprintf(req->error_str, sizeof(req->error_str),
			    "Frontend \"%s\" not found.", req->driver);
			break;
		}
		if (req->num_args > 0) {
			req->kern_args = ctl_copyin_args(req->num_args,
			    req->args, req->error_str, sizeof(req->error_str));
			if (req->kern_args == NULL) {
				req->status = CTL_LUN_ERROR;
				break;
			}
		}

		retval = fe->ioctl(dev, cmd, addr, flag, td);

		if (req->num_args > 0) {
			ctl_copyout_args(req->num_args, req->kern_args);
			ctl_free_args(req->num_args, req->kern_args);
		}
		break;
	}
	case CTL_PORT_LIST: {
		struct sbuf *sb;
		struct ctl_port *port;
		struct ctl_lun_list *list;
		struct ctl_option *opt;

		list = (struct ctl_lun_list *)addr;

		sb = sbuf_new(NULL, NULL, list->alloc_len, SBUF_FIXEDLEN);
		if (sb == NULL) {
			list->status = CTL_LUN_LIST_ERROR;
			snprintf(list->error_str, sizeof(list->error_str),
				 "Unable to allocate %d bytes for LUN list",
				 list->alloc_len);
			break;
		}

		sbuf_printf(sb, "<ctlportlist>\n");

		mtx_lock(&softc->ctl_lock);
		STAILQ_FOREACH(port, &softc->port_list, links) {
			retval = sbuf_printf(sb, "<targ_port id=\"%ju\">\n",
					     (uintmax_t)port->targ_port);

			/*
			 * Bail out as soon as we see that we've overfilled
			 * the buffer.
			 */
			if (retval != 0)
				break;

			retval = sbuf_printf(sb, "\t<frontend_type>%s"
			    "</frontend_type>\n", port->frontend->name);
			if (retval != 0)
				break;

			retval = sbuf_printf(sb, "\t<port_type>%d</port_type>\n",
					     port->port_type);
			if (retval != 0)
				break;

			retval = sbuf_printf(sb, "\t<online>%s</online>\n",
			    (port->status & CTL_PORT_STATUS_ONLINE) ? "YES" : "NO");
			if (retval != 0)
				break;

			retval = sbuf_printf(sb, "\t<port_name>%s</port_name>\n",
			    port->port_name);
			if (retval != 0)
				break;

			retval = sbuf_printf(sb, "\t<physical_port>%d</physical_port>\n",
			    port->physical_port);
			if (retval != 0)
				break;

			retval = sbuf_printf(sb, "\t<virtual_port>%d</virtual_port>\n",
			    port->virtual_port);
			if (retval != 0)
				break;

			retval = sbuf_printf(sb, "\t<wwnn>%#jx</wwnn>\n",
			    (uintmax_t)port->wwnn);
			if (retval != 0)
				break;

			retval = sbuf_printf(sb, "\t<wwpn>%#jx</wwpn>\n",
			    (uintmax_t)port->wwpn);
			if (retval != 0)
				break;

			if (port->port_info != NULL) {
				retval = port->port_info(port->onoff_arg, sb);
				if (retval != 0)
					break;
			}
			STAILQ_FOREACH(opt, &port->options, links) {
				retval = sbuf_printf(sb, "\t<%s>%s</%s>\n",
				    opt->name, opt->value, opt->name);
				if (retval != 0)
					break;
			}

			retval = sbuf_printf(sb, "</targ_port>\n");
			if (retval != 0)
				break;
		}
		mtx_unlock(&softc->ctl_lock);

		if ((retval != 0)
		 || ((retval = sbuf_printf(sb, "</ctlportlist>\n")) != 0)) {
			retval = 0;
			sbuf_delete(sb);
			list->status = CTL_LUN_LIST_NEED_MORE_SPACE;
			snprintf(list->error_str, sizeof(list->error_str),
				 "Out of space, %d bytes is too small",
				 list->alloc_len);
			break;
		}

		sbuf_finish(sb);

		retval = copyout(sbuf_data(sb), list->lun_xml,