/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * Copyright 2019 Joyent, Inc.
 */

#include <sys/mdb_modapi.h>
#include <sys/mutex.h>
#include <sys/modctl.h>
#include <time.h>
#include <sys/fibre-channel/fc.h>
#include <sys/fibre-channel/impl/fctl_private.h>
#include <sys/fibre-channel/impl/fc_ulpif.h>
#include <sys/fibre-channel/impl/fc_portif.h>
#include <sys/fibre-channel/impl/fc_fcaif.h>


/*
 * If we #include <string.h> then other definitions fail. This is
 * the easiest way of getting access to the function
 */
extern char *strtok(char *string, const char *sepset);

/* we need 26 bytes for the cftime() call */
#define TIMESTAMPSIZE   26 * sizeof (char)

/* for backward compatibility */
typedef struct fc_trace_dmsgv1 {
        int                     id_size;
        int                     id_flag;
        time_t                  id_time;
        caddr_t                 id_buf;
        struct fc_trace_dmsgv1  *id_next;
} fc_trace_dmsgv1_t;

static struct pwwn_hash *fp_pwwn_table;
static struct d_id_hash *fp_did_table;
static uint32_t pd_hash_index;
struct fc_local_port port;

/*
 * Leadville port walker/dcmd code
 */

/*
 * Initialize the fc_fca_port_t walker by either using the given starting
 * address, or reading the value of the kernel's fctl_fca_portlist pointer.
 * We also allocate a fc_fca_port_t for storage, and save this using the
 * walk_data pointer.
 */
static int
port_walk_i(mdb_walk_state_t *wsp)
{
        if (wsp->walk_addr == 0 &&
            mdb_readvar(&wsp->walk_addr, "fctl_fca_portlist") == -1) {
                mdb_warn("failed to read 'fctl_fca_portlist'");
                return (WALK_ERR);
        }

        wsp->walk_data = mdb_alloc(sizeof (fc_fca_port_t), UM_SLEEP);
        return (WALK_NEXT);
}

/*
 * At each step, read a fc_fca_port_t into our private storage, and then invoke
 * the callback function.  We terminate when we reach a NULL p_next pointer.
 */
static int
port_walk_s(mdb_walk_state_t *wsp)
{
        int status;

        if (wsp->walk_addr == 0)
                return (WALK_DONE);

        if (mdb_vread(wsp->walk_data, sizeof (fc_fca_port_t), wsp->walk_addr)
            == -1) {
                mdb_warn("failed to read fc_fca_port_t at %p", wsp->walk_addr);
                return (WALK_DONE);
        }

        status = wsp->walk_callback(wsp->walk_addr, wsp->walk_data,
            wsp->walk_cbdata);

        wsp->walk_addr =
            (uintptr_t)(((fc_fca_port_t *)wsp->walk_data)->port_next);

        return (status);
}

/*
 * The walker's fini function is invoked at the end of each walk.  Since we
 * dynamically allocated a fc_fca_port_t in port_walk_i, we must free it now.
 */
static void
port_walk_f(mdb_walk_state_t *wsp)
{
        mdb_free(wsp->walk_data, sizeof (fc_fca_port_t));
}


static int
ports(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
{
        fc_fca_port_t   portlist;
        fc_local_port_t port;
        int             longlist = FALSE;

        if (argc > 1) {
                return (DCMD_USAGE);
        }

        if (mdb_getopts(argc, argv,
            'l', MDB_OPT_SETBITS, TRUE, &longlist, NULL) != argc) {
                return (DCMD_USAGE);
        }


        if (!(flags & DCMD_ADDRSPEC)) {
                if (longlist == 0) {
                        if (mdb_walk_dcmd("ports", "ports",
                            argc, argv) == -1) {
                                mdb_warn("failed to walk 'fctl_fca_portlist'");
                                return (DCMD_ERR);
                        }
                } else {
                        if (mdb_walk_dcmd("ports", "fcport",
                            argc, argv) == -1) {
                                mdb_warn("failed to walk 'fctl_fca_portlist'");
                                return (DCMD_ERR);
                        }
                }

                return (DCMD_OK);
        }

        /*
         * If this is the first invocation of the command, print a nice
         * header line for the output that will follow.
         */
        if (DCMD_HDRSPEC(flags))
                mdb_printf("%16s %-2s %4s %-4s%16s %16s %16s\n",
                    "Port", "I#", "State", "Soft", "FCA Handle",
                    "Port DIP", "FCA Port DIP");

        /*
         * For each port, we just need to read the fc_fca_port_t struct, read
         * the port_handle
         */
        if (mdb_vread(&portlist, sizeof (fc_fca_port_t), addr) ==
            sizeof (fc_fca_port_t)) {
                /*
                 * Now read that port in
                 */

                if (mdb_vread(&port, sizeof (fc_local_port_t), (uintptr_t)
                    portlist.port_handle) == sizeof (fc_local_port_t)) {
                        mdb_printf("%16p %2d %4x %4x %16p %16p %16p\n",
                            portlist.port_handle, port.fp_instance,
                            port.fp_state, port.fp_soft_state,
                            port.fp_fca_handle, port.fp_port_dip,
                            port.fp_fca_dip);
                } else
                        mdb_warn("failed to read port at %p",
                            portlist.port_handle);

        } else
                mdb_warn("failed to read port info at %p", addr);

        return (DCMD_OK);
}


/*
 * Leadville ULP walker/dcmd code
 */

static int
ulp_walk_i(mdb_walk_state_t *wsp)
{
        if (wsp->walk_addr == 0 &&
            mdb_readvar(&wsp->walk_addr, "fctl_ulp_list") == -1) {
                mdb_warn("failed to read 'fctl_ulp_list'");
                return (WALK_ERR);
        }

        wsp->walk_data = mdb_alloc(sizeof (fc_ulp_list_t), UM_SLEEP);
        return (WALK_NEXT);
}



static int
ulp_walk_s(mdb_walk_state_t *wsp)
{
        int status;

        if (wsp->walk_addr == 0)
                return (WALK_DONE);

        if (mdb_vread(wsp->walk_data, sizeof (fc_ulp_list_t), wsp->walk_addr)
            == -1) {
                mdb_warn("failed to read fctl_ulp_list %p", wsp->walk_addr);
                return (WALK_DONE);
        }

        status = wsp->walk_callback(wsp->walk_addr, wsp->walk_data,
            wsp->walk_cbdata);

        wsp->walk_addr =
            (uintptr_t)(((fc_ulp_list_t *)wsp->walk_data)->ulp_next);

        return (status);
}


static void
ulp_walk_f(mdb_walk_state_t *wsp)
{
        mdb_free(wsp->walk_data, sizeof (fc_ulp_list_t));
}


static int
ulps(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
{
        fc_ulp_list_t           ulplist;
        fc_ulp_modinfo_t        ulp;
        char                    ulp_name[30];

        if (argc != 0) {
                return (DCMD_USAGE);
        }

        /*
         * If no fc_ulp_list_t address was specified on the command line, we can
         * print out all processes by invoking the walker, using this
         * dcmd itself as the callback.
         */
        if (!(flags & DCMD_ADDRSPEC)) {
                if (mdb_walk_dcmd("ulps", "ulps", argc, argv) == -1) {
                        mdb_warn("failed to walk 'fc_ulp_list_t'");
                        return (DCMD_ERR);
                }
                return (DCMD_OK);
        }

        /*
         * If this is the first invocation of the command, print a nice
         * header line for the output that will follow.
         */
        if (DCMD_HDRSPEC(flags))
                mdb_printf("%30s %4s %8s\n", "ULP Name", "Type", "Revision");

        /*
         * For each port, we just need to read the fc_fca_port_t struct, read
         * the port_handle
         */
        if (mdb_vread(&ulplist, sizeof (fc_ulp_list_t), addr) ==
            sizeof (fc_ulp_list_t)) {
                /*
                 * Now read that port in
                 */

                if (mdb_vread(&ulp, sizeof (fc_ulp_modinfo_t),
                    (uintptr_t)ulplist.ulp_info) == sizeof (fc_ulp_modinfo_t)) {
                        if (mdb_vread(&ulp_name, 30,
                            (uintptr_t)ulp.ulp_name) > 0) {
                                mdb_printf("%30s %4x %8x\n",
                                    ulp_name, ulp.ulp_type, ulp.ulp_rev);
                        }
                } else
                        mdb_warn("failed to read ulp at %p",
                            ulplist.ulp_info);

        } else
                mdb_warn("failed to read ulplist at %p", addr);

        return (DCMD_OK);
}



/*
 * Leadville ULP module walker/dcmd code
 */

static int
ulpmod_walk_i(mdb_walk_state_t *wsp)
{
        if (wsp->walk_addr == 0 &&
            mdb_readvar(&wsp->walk_addr, "fctl_ulp_modules") == -1) {
                mdb_warn("failed to read 'fctl_ulp_modules'");
                return (WALK_ERR);
        }

        wsp->walk_data = mdb_alloc(sizeof (fc_ulp_module_t), UM_SLEEP);
        return (WALK_NEXT);
}



static int
ulpmod_walk_s(mdb_walk_state_t *wsp)
{
        int status;

        if (wsp->walk_addr == 0)
                return (WALK_DONE);

        if (mdb_vread(wsp->walk_data, sizeof (fc_ulp_module_t), wsp->walk_addr)
            == -1) {
                mdb_warn("failed to read fctl_ulp_modules %p", wsp->walk_addr);
                return (WALK_DONE);
        }

        status = wsp->walk_callback(wsp->walk_addr, wsp->walk_data,
            wsp->walk_cbdata);

        wsp->walk_addr =
            (uintptr_t)(((fc_ulp_module_t *)wsp->walk_data)->mod_next);

        return (status);
}


static void
ulpmod_walk_f(mdb_walk_state_t *wsp)
{
        mdb_free(wsp->walk_data, sizeof (fc_ulp_module_t));
}


static int
ulpmods(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
{
        fc_ulp_module_t         modlist;
        fc_ulp_modinfo_t        modinfo;
        fc_ulp_ports_t          ulp_port;

        if (argc != 0) {
                return (DCMD_USAGE);
        }

        if (!(flags & DCMD_ADDRSPEC)) {
                if (mdb_walk_dcmd("ulpmods", "ulpmods", argc, argv)
                    == -1) {
                        mdb_warn("failed to walk 'fc_ulp_module_t'");
                        return (DCMD_ERR);
                }
                return (DCMD_OK);
        }

        /*
         * If this is the first invocation of the command, print a nice
         * header line for the output that will follow.
         */
        if (DCMD_HDRSPEC(flags))
                mdb_printf("%4s %16s %8s %8s\n",
                    "Type", "Port Handle", "dstate", "statec");

        /*
         * For each port, we just need to read the fc_fca_port_t struct, read
         * the port_handle
         */
        if (mdb_vread(&modlist, sizeof (fc_ulp_module_t), addr) ==
            sizeof (fc_ulp_module_t)) {
                /*
                 * Now read that module info in
                 */

                if (mdb_vread(&modinfo, sizeof (fc_ulp_modinfo_t),
                    (uintptr_t)modlist.mod_info) == sizeof (fc_ulp_modinfo_t)) {
                        /* Now read all the ports for this module */
                        if (mdb_vread(&ulp_port, sizeof (fc_ulp_ports_t),
                            (uintptr_t)modlist.mod_ports) ==
                            sizeof (fc_ulp_ports_t)) {
                                while (ulp_port.port_handle != NULL) {
                                        mdb_printf("%4x %16p %8x %8x\n",
                                            modinfo.ulp_type,
                                            ulp_port.port_handle,
                                            ulp_port.port_dstate,
                                            ulp_port.port_statec);

                                        if (ulp_port.port_next == NULL)
                                                break;

                                        mdb_vread(&ulp_port,
                                            sizeof (fc_ulp_ports_t),
                                            (uintptr_t)ulp_port.port_next);
                                }
                        }
                } else
                        mdb_warn("failed to read modinfo at %p",
                            modlist.mod_info);

        } else
                mdb_warn("failed to read modlist at %p", addr);

        return (DCMD_OK);
}


/*
 * Display an fc_local_port_t struct
 */
static int
fcport(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
{
        fc_fca_port_t   portlist;
        fc_local_port_t port;
        int             idx;
        int             first = 1;
        int             walking_fc_fca_portlist = 0;

        if (argc != 0) {
                int result;

                if (argc != 1)
                        return (DCMD_USAGE);

                if (argv->a_type != MDB_TYPE_STRING)
                        return (DCMD_USAGE);

                walking_fc_fca_portlist = 1;
        }

        if (!(flags & DCMD_ADDRSPEC)) {
                mdb_printf("Sorry, you must provide an address\n");
                return (DCMD_ERR);
        }

        if (walking_fc_fca_portlist) {
                /*
                 * Must read the fc_fca_portlist to get the fc_local_port addr
                 */
                if (mdb_vread(&portlist, sizeof (fc_fca_port_t), addr) ==
                    sizeof (fc_fca_port_t)) {
                        addr = (uintptr_t)portlist.port_handle;
                }
        }

        mdb_printf("Reading fc_local_port_t at %p:\n", addr);

        /*
         * For each port, we just need to read the fc_local_port_t struct
         */

        if (mdb_vread(&port, sizeof (fc_local_port_t),
            addr) == sizeof (fc_local_port_t)) {
                mdb_printf("  fp_mutex          : 0x%p\n", port.fp_mutex);
                mdb_printf("  fp_state          : 0x%-8x\n", port.fp_state);
                mdb_printf("  fp_port_id        : 0x%-06x\n",
                    port.fp_port_id.port_id);
                mdb_printf("  fp_fca_handle     : 0x%p\n", port.fp_fca_handle);
                mdb_printf("  fp_fca_tran       : 0x%p\n", port.fp_fca_tran);
                mdb_printf("  fp_job_head       : 0x%p\n", port.fp_job_head);
                mdb_printf("  fp_job_tail       : 0x%p\n", port.fp_job_tail);
                mdb_printf("  fp_wait_head      : 0x%p\n", port.fp_wait_head);
                mdb_printf("  fp_wait_tail      : 0x%p\n", port.fp_wait_tail);
                mdb_printf("  fp_topology       : %u\n", port.fp_topology);
                mdb_printf("  fp_task           : %d\n", port.fp_task);
                mdb_printf("  fp_last_task      : %d\n", port.fp_last_task);
                mdb_printf("  fp_soft_state     : 0x%-4x\n",
                    port.fp_soft_state);
                mdb_printf("  fp_flag           : 0x%-2x\n", port.fp_flag);
                mdb_printf("  fp_statec_busy    : 0x%-8x\n",
                    port.fp_statec_busy);
                mdb_printf("  fp_port_num       : %d\n", port.fp_port_num);
                mdb_printf("  fp_instance       : %d\n", port.fp_instance);
                mdb_printf("  fp_ulp_attach     : %d\n", port.fp_ulp_attach);
                mdb_printf("  fp_dev_count      : %d\n", port.fp_dev_count);
                mdb_printf("  fp_total_devices  : %d\n", port.fp_total_devices);
                mdb_printf("  fp_bind_state     : 0x%-8x\n",
                    port.fp_bind_state);
                mdb_printf("  fp_options        : 0x%-8x\n", port.fp_options);
                mdb_printf("  fp_port_type      : 0x%-2x\n",
                    port.fp_port_type.port_type);
                mdb_printf("  fp_ub_count       : %d\n", port.fp_ub_count);
                mdb_printf("  fp_active_ubs     : %d\n", port.fp_active_ubs);
                mdb_printf("  fp_port_dip       : 0x%p\n", port.fp_port_dip);
                mdb_printf("  fp_fca_dip        : 0x%p\n", port.fp_fca_dip);

                for (idx = 0; idx < 16; idx++) {
                        if (port.fp_ip_addr[idx] != 0)
                                break;
                }

                if (idx != 16) {
                        mdb_printf("  fp_ip_addr        : %-2x:%-2x:%-2x:%-2x:"
                            "%-2x:%-2x:%-2x:%-2x:%-2x:%-2x:%-2x:%-2x:%-2x:%-2x"
                            ":%-2x:%-2x\n",
                            port.fp_ip_addr[0], port.fp_ip_addr[1],
                            port.fp_ip_addr[2], port.fp_ip_addr[3],
                            port.fp_ip_addr[4], port.fp_ip_addr[5],
                            port.fp_ip_addr[6], port.fp_ip_addr[7],
                            port.fp_ip_addr[8], port.fp_ip_addr[9],
                            port.fp_ip_addr[10], port.fp_ip_addr[11],
                            port.fp_ip_addr[12], port.fp_ip_addr[13],
                            port.fp_ip_addr[14], port.fp_ip_addr[15]);
                } else {
                        mdb_printf("  fp_ip_addr        : N/A\n");
                }

                mdb_printf("  fp_fc4_types      : ");

                for (idx = 0; idx < 8; idx++) {
                        if (port.fp_fc4_types[idx] != 0) {
                                if (first) {
                                        mdb_printf("%d",
                                            port.fp_fc4_types[idx]);
                                        first = 0;
                                } else {
                                        mdb_printf(", %d",
                                            port.fp_fc4_types[idx]);
                                }
                        }
                }

                if (first) {
                        mdb_printf("None\n");
                } else {
                        mdb_printf("\n");
                }

                mdb_printf("  fp_pm_level       : %d\n", port.fp_pm_level);
                mdb_printf("  fp_pm_busy        : %d\n", port.fp_pm_busy);
                mdb_printf("  fp_pm_busy_nocomp : 0x%-8x\n",
                    port.fp_pm_busy_nocomp);
                mdb_printf("  fp_hard_addr      : 0x%-6x\n",
                    port.fp_hard_addr.hard_addr);
                mdb_printf("  fp_sym_port_name  : \"%s\"\n",
                    port.fp_sym_port_name);
                mdb_printf("  fp_sym_node_name  : \"%s\"\n",
                    port.fp_sym_node_name);
                mdb_printf("  fp_rscn_count     : %d\n", port.fp_rscn_count);
        } else {
                mdb_warn("failed to read fc_local_port_t at 0x%p", addr);
        }

        mdb_printf("\n");

        return (DCMD_OK);
}


/*
 * Leadville remote_port walker/dcmd code
 */

/*
 * We need to be given the address of a port structure in order to start
 * walking.  From that, we can read the pwwn table.
 */
static int
pd_by_pwwn_walk_i(mdb_walk_state_t *wsp)
{
        fc_local_port_t port;

        if (wsp->walk_addr == 0) {
                mdb_warn("pd_by_pwwn walk doesn't support global walks\n");
                return (WALK_ERR);
        }

        /*
         * Allocate space for the pwwn_hash table
         */

        fp_pwwn_table = mdb_alloc(sizeof (struct pwwn_hash) *
            PWWN_HASH_TABLE_SIZE, UM_SLEEP);

        /*
         * Input should be an fc_local_port_t, so read it to get the pwwn
         * table's head
         */

        if (mdb_vread(&port, sizeof (fc_local_port_t), wsp->walk_addr) !=
            sizeof (fc_local_port_t)) {
                mdb_warn("Unable to read in the port structure address\n");
                return (WALK_ERR);
        }

        if (mdb_vread(fp_pwwn_table, sizeof (struct pwwn_hash) *
            PWWN_HASH_TABLE_SIZE, (uintptr_t)port.fp_pwwn_table) == -1) {
                mdb_warn("Unable to read in the pwwn hash table\n");
                return (WALK_ERR);
        }

        pd_hash_index = 0;

        while ((fp_pwwn_table[pd_hash_index].pwwn_head == NULL) &&
            (pd_hash_index < PWWN_HASH_TABLE_SIZE)) {
                pd_hash_index++;
        }

        wsp->walk_addr = (uintptr_t)fp_pwwn_table[pd_hash_index].pwwn_head;

        wsp->walk_data = mdb_alloc(sizeof (fc_remote_port_t), UM_SLEEP);
        return (WALK_NEXT);
}

/*
 * At each step, read a fc_remote_port_t into our private storage, and then
 * invoke the callback function.  We terminate when we reach a NULL p_next
 * pointer.
 */
static int
pd_by_pwwn_walk_s(mdb_walk_state_t *wsp)
{
        int status;

        if ((wsp->walk_addr == 0) &&
            (pd_hash_index >= (PWWN_HASH_TABLE_SIZE - 1))) {
                return (WALK_DONE);
        }

        if (mdb_vread(wsp->walk_data, sizeof (fc_remote_port_t), wsp->walk_addr)
            == -1) {
                mdb_warn("failed to read fc_remote_port at %p", wsp->walk_addr);
                return (WALK_DONE);
        }

        status = wsp->walk_callback(wsp->walk_addr, wsp->walk_data,
            wsp->walk_cbdata);

        wsp->walk_addr =
            (uintptr_t)(((fc_remote_port_t *)wsp->walk_data)->pd_wwn_hnext);

        if (wsp->walk_addr == 0) {
                /*
                 * Try the next hash list, if there is one.
                 */

                pd_hash_index++;

                while ((fp_pwwn_table[pd_hash_index].pwwn_head == NULL) &&
                    (pd_hash_index < PWWN_HASH_TABLE_SIZE)) {
                        pd_hash_index++;
                }

                if (pd_hash_index == PWWN_HASH_TABLE_SIZE) {
                        /* We're done */
                        return (status);
                }

                wsp->walk_addr =
                    (uintptr_t)fp_pwwn_table[pd_hash_index].pwwn_head;
        }

        return (status);
}

/*
 * The walker's fini function is invoked at the end of each walk.
 */
static void
pd_by_pwwn_walk_f(mdb_walk_state_t *wsp)
{
        mdb_free(wsp->walk_data, sizeof (fc_remote_port_t));
        mdb_free(fp_pwwn_table, sizeof (struct pwwn_hash) *
            PWWN_HASH_TABLE_SIZE);
        fp_pwwn_table = NULL;
}

/*
 * This is the same walker as pd_by_pwwn, but we walk the D_ID hash table
 */

static int
pd_by_did_walk_i(mdb_walk_state_t *wsp)
{
        fc_local_port_t port;

        if (wsp->walk_addr == 0) {
                mdb_warn("pd_by_did walk doesn't support global walks\n");
                return (WALK_ERR);
        }

        /*
         * Allocate space for the did_hash table
         */

        fp_did_table = mdb_alloc(sizeof (struct d_id_hash) *
            D_ID_HASH_TABLE_SIZE, UM_SLEEP);

        /*
         * Input should be an fc_local_port_t, so read it to get the d_id
         * table's head
         */

        if (mdb_vread(&port, sizeof (fc_local_port_t), wsp->walk_addr) !=
            sizeof (fc_local_port_t)) {
                mdb_warn("Unable to read in the port structure address\n");
                return (WALK_ERR);
        }

        if (mdb_vread(fp_did_table, sizeof (struct d_id_hash) *
            D_ID_HASH_TABLE_SIZE, (uintptr_t)port.fp_did_table) == -1) {
                mdb_warn("Unable to read in the D_ID hash table\n");
                return (WALK_ERR);
        }
        pd_hash_index = 0;

        while ((fp_did_table[pd_hash_index].d_id_head == NULL) &&
            (pd_hash_index < D_ID_HASH_TABLE_SIZE)) {
                pd_hash_index++;
        }

        wsp->walk_addr = (uintptr_t)fp_did_table[pd_hash_index].d_id_head;

        wsp->walk_data = mdb_alloc(sizeof (fc_remote_port_t), UM_SLEEP);
        return (WALK_NEXT);
}

/*
 * At each step, read a fc_remote_port_t into our private storage, and then
 * invoke the callback function.  We terminate when we reach a NULL p_next
 * pointer.
 */
static int
pd_by_did_walk_s(mdb_walk_state_t *wsp)
{
        int status;

        if ((wsp->walk_addr == 0) &&
            (pd_hash_index >= (D_ID_HASH_TABLE_SIZE - 1))) {
                return (WALK_DONE);
        }

        if (mdb_vread(wsp->walk_data, sizeof (fc_remote_port_t), wsp->walk_addr)
            == -1) {
                mdb_warn("failed to read fc_remote_port at %p", wsp->walk_addr);
                return (WALK_DONE);
        }

        status = wsp->walk_callback(wsp->walk_addr, wsp->walk_data,
            wsp->walk_cbdata);

        wsp->walk_addr =
            (uintptr_t)(((fc_remote_port_t *)wsp->walk_data)->pd_did_hnext);

        if (wsp->walk_addr == 0) {
                /*
                 * Try the next hash list, if there is one.
                 */

                pd_hash_index++;

                while ((fp_did_table[pd_hash_index].d_id_head == NULL) &&
                    (pd_hash_index < D_ID_HASH_TABLE_SIZE)) {
                        pd_hash_index++;
                }

                if (pd_hash_index == D_ID_HASH_TABLE_SIZE) {
                        /* We're done */
                        return (status);
                }

                wsp->walk_addr =
                    (uintptr_t)fp_did_table[pd_hash_index].d_id_head;
        }

        return (status);
}

/*
 * The walker's fini function is invoked at the end of each walk.
 */
static void
pd_by_did_walk_f(mdb_walk_state_t *wsp)
{
        mdb_free(wsp->walk_data, sizeof (fc_remote_port_t));
        mdb_free(fp_did_table, sizeof (struct d_id_hash) *
            D_ID_HASH_TABLE_SIZE);
        fp_did_table = NULL;
}


/*
 * Display a remote_port structure
 */
static int
remote_port(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
{
        fc_remote_port_t        pd;
        int                     idx;
        int                     first = 1;

        if (argc > 0) {
                return (DCMD_USAGE);
        }

        if (!(flags & DCMD_ADDRSPEC)) {
                mdb_printf("Sorry, you must provide an address\n");
                return (DCMD_ERR);
        }

        if (mdb_vread(&pd, sizeof (fc_remote_port_t), addr) !=
            sizeof (fc_remote_port_t)) {
                mdb_warn("Error reading pd at 0x%x\n", addr);
                return (DCMD_ERR);
        }

        mdb_printf("Reading remote_port at 0x%p\n", addr);
        mdb_printf("  mutex          : 0x%p\n", pd.pd_mutex);
        mdb_printf("  port_id        : 0x%-8x\n", pd.pd_port_id);
        mdb_printf("  port_name      : 0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
            pd.pd_port_name.raw_wwn[0], pd.pd_port_name.raw_wwn[1],
            pd.pd_port_name.raw_wwn[2], pd.pd_port_name.raw_wwn[3],
            pd.pd_port_name.raw_wwn[4], pd.pd_port_name.raw_wwn[5],
            pd.pd_port_name.raw_wwn[6], pd.pd_port_name.raw_wwn[7]);
        mdb_printf("  login_count    : %d\n", pd.pd_login_count);
        mdb_printf("  state          : 0x%x ", pd.pd_state);

        switch (pd.pd_state) {
        case PORT_DEVICE_INVALID:
                mdb_printf("(invalid)\n");
                break;
        case PORT_DEVICE_VALID:
                mdb_printf("(valid)\n");
                break;
        case PORT_DEVICE_LOGGED_IN:
                mdb_printf("(logged in)\n");
                break;
        default:
                mdb_printf("(Unknown state)\n");
        }

        mdb_printf("  remote node    : 0x%p\n", pd.pd_remote_nodep);
        mdb_printf("  hard_addr      : 0x%x\n", pd.pd_hard_addr);
        mdb_printf("  local port     : 0x%p\n", pd.pd_port);
        mdb_printf("  type           : %d ", pd.pd_type);

        switch (pd.pd_type) {
        case PORT_DEVICE_NOCHANGE:
                mdb_printf("(No change)\n");
                break;
        case PORT_DEVICE_NEW:
                mdb_printf("(New)\n");
                break;
        case PORT_DEVICE_OLD:
                mdb_printf("(Old)\n");
                break;
        case PORT_DEVICE_CHANGED:
                mdb_printf("(Changed)\n");
                break;
        case PORT_DEVICE_DELETE:
                mdb_printf("(Delete)\n");
                break;
        case PORT_DEVICE_USER_LOGIN:
                mdb_printf("(User login)\n");
                break;
        case PORT_DEVICE_USER_LOGOUT:
                mdb_printf("(User logout)\n");
                break;
        case PORT_DEVICE_USER_CREATE:
                mdb_printf("(User create)\n");
                break;
        case PORT_DEVICE_USER_DELETE:
                mdb_printf("(User delete)\n");
                break;
        default:
                mdb_printf("(Unknown type)\n");
        }

        mdb_printf("  flags          : 0x%x ", pd.pd_flags);

        switch (pd.pd_flags) {
        case PD_IDLE:
                mdb_printf("(Idle)\n");
                break;
        case PD_ELS_IN_PROGRESS:
                mdb_printf("(ELS in progress)\n");
                break;
        case PD_ELS_MARK:
                mdb_printf("(Mark)\n");
                break;
        default:
                mdb_printf("(Unknown flag value)\n");
        }

        mdb_printf("  login_class    : 0x%x\n", pd.pd_login_class);
        mdb_printf("  recipient      : %d\n", pd.pd_recepient);
        mdb_printf("  ref_count      : %d\n", pd.pd_ref_count);
        mdb_printf("  aux_flags      : 0x%x ", pd.pd_aux_flags);

        first = 1;
        if (pd.pd_aux_flags & PD_IN_DID_QUEUE) {
                mdb_printf("(IN_DID_QUEUE");
                first = 0;
        }

        if (pd.pd_aux_flags & PD_DISABLE_RELOGIN) {
                if (first) {
                        mdb_printf("(DISABLE_RELOGIN");
                } else {
                        mdb_printf(", DISABLE_RELOGIN");
                }
                first = 0;
        }

        if (pd.pd_aux_flags & PD_NEEDS_REMOVAL) {
                if (first) {
                        mdb_printf("(NEEDS_REMOVAL");
                } else {
                        mdb_printf(", NEEDS_REMOVAL");
                }
                first = 0;
        }

        if (pd.pd_aux_flags & PD_LOGGED_OUT) {
                if (first) {
                        mdb_printf("(LOGGED_OUT");
                } else {
                        mdb_printf(", LOGGED_OUT");
                }
                first = 0;
        }

        if (pd.pd_aux_flags & PD_GIVEN_TO_ULPS) {
                if (first) {
                        mdb_printf("(GIVEN_TO_ULPS");
                } else {
                        mdb_printf(", GIVEN_TO_ULPS");
                }
                first = 0;
        }

        if (first == 0) {
                mdb_printf(")\n");
        } else {
                mdb_printf("\n");
        }

        mdb_printf("  sig            : %p\n", pd.pd_logo_tc.sig);
        mdb_printf("  active         : %d\n", pd.pd_logo_tc.active);
        mdb_printf("  counter        : %d\n", pd.pd_logo_tc.counter);
        mdb_printf("  max_value      : %d\n", pd.pd_logo_tc.max_value);
        mdb_printf("  timer          : %d\n", pd.pd_logo_tc.timer);
        mdb_printf("\n");

        return (DCMD_OK);
}

int
fc_dump_logmsg(fc_trace_dmsg_t *addr, uint_t pktstart, uint_t pktend,
    uint_t *printed)
{
        fc_trace_dmsg_t msg;
        caddr_t         buf;
        char            merge[1024];
        caddr_t         tmppkt;
        char            *tmpbuf; /* for tokenising the buffer */
        uint_t          pktnum = 0;

        while (addr != NULL) {
                if (mdb_vread(&msg, sizeof (msg), (uintptr_t)addr) !=
                    sizeof (msg)) {
                        mdb_warn("failed to read message pointer in kernel");
                        return (DCMD_ERR);
                }

                if (msg.id_size) {

                        buf = mdb_alloc(msg.id_size + 1, UM_SLEEP);
                        tmppkt = mdb_alloc(msg.id_size + 1, UM_SLEEP);

                        if (mdb_vread(buf, msg.id_size,
                            (uintptr_t)msg.id_buf) != msg.id_size) {
                                mdb_warn("failed to read buffer contents"
                                    " in kernel");
                                mdb_free(buf, msg.id_size + 1);
                                return (DCMD_ERR);
                        }

                        if (buf[0] == '\n') {
                                mdb_printf("There is a problem in"
                                    "the buffer\n");
                        }
                        /* funky packet processing stuff */
                        bcopy(buf, tmppkt, msg.id_size + 1);

                        /* find the equals sign, and put a null there */
                        tmpbuf = strchr(tmppkt, '=');
                        *tmpbuf = 0;
                        pktnum = (uint_t)mdb_strtoull(tmppkt);

                        if ((pktnum >= pktstart) && (pktnum <= pktend)) {
                                (void) mdb_snprintf(merge, sizeof (merge),
                                    "[%Y:%03d:%03d:%03d] %s",
                                    msg.id_time.tv_sec,
                                    (int)msg.id_time.tv_nsec/1000000,
                                    (int)(msg.id_time.tv_nsec/1000)%1000,
                                    (int)msg.id_time.tv_nsec%1000, buf);
                                mdb_printf("%s", merge);
                                if (printed != NULL)
                                        (*printed) ++;
                        }
                        mdb_free(buf, msg.id_size + 1);
                        mdb_free(tmppkt, msg.id_size + 1);
                }
                addr = msg.id_next;
        }

        return (DCMD_OK);
}

int
fc_dump_old_logmsg(fc_trace_dmsgv1_t *addr, uint_t pktstart, uint_t pktend,
    uint_t *printed)
{
        fc_trace_dmsgv1_t       msg;
        caddr_t                 buf;
        char                    merge[1024];
        caddr_t                 tmppkt;
        char                    *tmpbuf; /* for tokenising the buffer */
        uint_t                  pktnum = 0;

        while (addr != NULL) {
                if (mdb_vread(&msg, sizeof (msg), (uintptr_t)addr) !=
                    sizeof (msg)) {
                        mdb_warn("failed to read message pointer in kernel");
                        return (DCMD_ERR);
                }

                if (msg.id_size) {

                        buf = mdb_alloc(msg.id_size + 1, UM_SLEEP);
                        tmppkt = mdb_alloc(msg.id_size + 1, UM_SLEEP);

                        if (mdb_vread(buf, msg.id_size,
                            (uintptr_t)msg.id_buf) != msg.id_size) {
                                mdb_warn("failed to read buffer contents"
                                    " in kernel");
                                mdb_free(buf, msg.id_size + 1);
                                return (DCMD_ERR);
                        }

                        if (buf[0] == '\n') {
                                mdb_printf("There is a problem in"
                                    "the buffer\n");
                        }
                        /* funky packet processing stuff */
                        bcopy(buf, tmppkt, msg.id_size + 1);

                        tmpbuf = strchr(tmppkt, '=');
                        *tmpbuf = 0;
                        pktnum = (uint_t)mdb_strtoull(tmppkt);

                        if ((pktnum >= pktstart) && (pktnum <= pktend)) {
                                (void) mdb_snprintf(merge, sizeof (merge),
                                    "[%Y] %s", msg.id_time, buf);
                                mdb_printf("%s", merge);
                                if (printed != NULL)
                                        (*printed) ++;
                        }
                        mdb_free(buf, msg.id_size + 1);
                        mdb_free(tmppkt, msg.id_size + 1);
                }
                addr = msg.id_next;
        }

        return (DCMD_OK);
}

int
fc_trace_dump(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
{
        fc_trace_logq_t logq;
        uint_t          pktnum = 0;
        uint_t          printed = 0; /* have we printed anything? */

        uintptr_t       pktstart = 0;
        uintptr_t       pktend = UINT_MAX;
        int             rval = DCMD_OK;

        if (mdb_vread(&logq, sizeof (logq), addr) != sizeof (logq)) {
                mdb_warn("Failed to read log queue in kernel");
                return (DCMD_ERR);
        }

        if (mdb_getopts(argc, argv,
            's', MDB_OPT_UINTPTR, &pktstart,
            'e', MDB_OPT_UINTPTR, &pktend,
            NULL) != argc) {
                return (DCMD_USAGE);
        }

        if (pktstart > pktend) {
                return (DCMD_USAGE);
        }

        if ((logq.il_flags & FC_TRACE_LOGQ_V2) != 0) {
                rval = fc_dump_logmsg((fc_trace_dmsg_t *)logq.il_msgh, pktstart,
                    pktend, &printed);
        } else {
                rval = fc_dump_old_logmsg((fc_trace_dmsgv1_t *)logq.il_msgh,
                    pktstart, pktend, &printed);
        }

        if (rval != DCMD_OK) {
                return (rval);
        }

        if (printed == 0) {
                mdb_printf("No packets in the buffer match the"
                    " criteria given");
        }

        return (rval);
}

int
fp_trace_dump(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
{
        if (mdb_readvar(&addr, "fp_logq") == -1) {
                mdb_warn("failed to read fp_logq");
                return (DCMD_ERR);
        }

        if (DCMD_HDRSPEC(flags)) {
                mdb_printf("fp trace buffer contents\n");
        }

        return (fc_trace_dump(addr, flags, argc, argv));
}


int
fcp_trace_dump(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
{
        if (mdb_readvar(&addr, "fcp_logq") == -1) {
                mdb_warn("failed to read fcp_logq");
                return (DCMD_ERR);
        }

        if (DCMD_HDRSPEC(flags)) {
                mdb_printf("fcp trace buffer contents\n");
        }

        return (fc_trace_dump(addr, flags, argc, argv));
}

/*
 * Leadville job_request walker/dcmd code
 */

/*
 * We need to be given the address of a local port structure in order to start
 * walking.  From that, we can read the job_request list.
 */

static int
job_request_walk_i(mdb_walk_state_t *wsp)
{
        if (wsp->walk_addr == 0) {
                mdb_warn("The address of a fc_local_port"
                    " structure must be given\n");
                return (WALK_ERR);
        }

        /*
         * Input should be a fc_local_port_t, so read it to get the job_request
         * lists's head
         */

        if (mdb_vread(&port, sizeof (fc_local_port_t), wsp->walk_addr) !=
            sizeof (fc_local_port_t)) {
                mdb_warn("Failed to read in the fc_local_port"
                    " at 0x%p\n", wsp->walk_addr);
                return (WALK_ERR);
        }

        wsp->walk_addr = (uintptr_t)(port.fp_job_head);
        wsp->walk_data = mdb_alloc(sizeof (struct job_request), UM_SLEEP);

        return (WALK_NEXT);
}

static int
job_request_walk_s(mdb_walk_state_t *wsp)
{
        int status;

        if (wsp->walk_addr == 0)
                return (WALK_DONE);

        if (mdb_vread(wsp->walk_data, sizeof (struct job_request),
            wsp->walk_addr) == -1) {
                mdb_warn("Failed to read in the job_request at 0x%p\n",
                    wsp->walk_addr);
                return (WALK_DONE);
        }

        status = wsp->walk_callback(wsp->walk_addr, wsp->walk_data,
            wsp->walk_cbdata);

        wsp->walk_addr =
            (uintptr_t)(((struct job_request *)wsp->walk_data)->job_next);

        return (status);
}

/*
 * The walker's fini function is invoked at the end of each walk.
 */
static void
job_request_walk_f(mdb_walk_state_t *wsp)
{
        mdb_free(wsp->walk_data, sizeof (struct job_request));
}


/*
 * Leadville fc_orphan walker/dcmd code
 */

/*
 * We need to be given the address of a port structure in order to start
 * walking.  From that, we can read the orphan list.
 */

static int
orphan_walk_i(mdb_walk_state_t *wsp)
{
        if (wsp->walk_addr == 0) {
                mdb_warn("The address of a fc_local_port"
                    " structure must be given\n");
                return (WALK_ERR);
        }

        /*
         * Input should be a fc_local_port_t, so read it to get the orphan
         * lists's head
         */

        if (mdb_vread(&port, sizeof (fc_local_port_t), wsp->walk_addr) !=
            sizeof (fc_local_port_t)) {
                mdb_warn("Failed to read in the fc_local_port"
                    " at 0x%p\n", wsp->walk_addr);
                return (WALK_ERR);
        }

        wsp->walk_addr = (uintptr_t)(port.fp_orphan_list);
        wsp->walk_data = mdb_alloc(sizeof (struct fc_orphan), UM_SLEEP);

        return (WALK_NEXT);
}

static int
orphan_walk_s(mdb_walk_state_t *wsp)
{
        int status;

        if (wsp->walk_addr == 0)
                return (WALK_DONE);

        if (mdb_vread(wsp->walk_data, sizeof (struct fc_orphan),
            wsp->walk_addr) == -1) {
                mdb_warn("Failed to read in the fc_orphan at 0x%p\n",
                    wsp->walk_addr);
                return (WALK_DONE);
        }

        status = wsp->walk_callback(wsp->walk_addr, wsp->walk_data,
            wsp->walk_cbdata);

        wsp->walk_addr =
            (uintptr_t)(((struct fc_orphan *)wsp->walk_data)->orp_next);

        return (status);
}

/*
 * The walker's fini function is invoked at the end of each walk.
 */
static void
orphan_walk_f(mdb_walk_state_t *wsp)
{
        mdb_free(wsp->walk_data, sizeof (struct fc_orphan));
}


/*
 * MDB module linkage information:
 *
 * We declare a list of structures describing our dcmds, a list of structures
 * describing our walkers, and a function named _mdb_init to return a pointer
 * to our module information.
 */

static const mdb_dcmd_t dcmds[] = {
        { "ports", "[-l]", "Leadville port list", ports },
        { "ulps", NULL, "Leadville ULP list", ulps },
        { "ulpmods", NULL, "Leadville ULP module list", ulpmods },
        { "fcport", NULL, "Display a Leadville fc_local_port structure",
            fcport },
        { "remote_port", NULL, "Display fc_remote_port structures",
            remote_port },
        { "fcptrace", "[-s m][-e n] (m < n)", "Dump the fcp trace buffer, "
            "optionally supplying starting and ending packet numbers.",
            fcp_trace_dump, NULL },
        { "fptrace", "[-s m][-e n] (m < n)", "Dump the fp trace buffer, "
            "optionally supplying starting and ending packet numbers.",
            fp_trace_dump, NULL },
        { NULL }
};

static const mdb_walker_t walkers[] = {
        { "ports", "walk list of Leadville port structures",
            port_walk_i, port_walk_s, port_walk_f },
        { "ulps", "walk list of Leadville ULP structures",
            ulp_walk_i, ulp_walk_s, ulp_walk_f },
        { "ulpmods", "walk list of Leadville ULP module structures",
            ulpmod_walk_i, ulpmod_walk_s, ulpmod_walk_f },
        { "pd_by_pwwn", "walk list of fc_remote_port structures hashed by PWWN",
            pd_by_pwwn_walk_i, pd_by_pwwn_walk_s, pd_by_pwwn_walk_f },
        { "pd_by_did", "walk list of fc_remote_port structures hashed by D_ID",
            pd_by_did_walk_i, pd_by_did_walk_s, pd_by_did_walk_f },
        { "job_request", "walk list of job_request structures for a local port",
            job_request_walk_i, job_request_walk_s, job_request_walk_f },
        { "orphan", "walk list of orphan structures for a local port",
            orphan_walk_i, orphan_walk_s, orphan_walk_f },
        { NULL }
};

static const mdb_modinfo_t modinfo = {
        MDB_API_VERSION, dcmds, walkers
};

const mdb_modinfo_t *
_mdb_init(void)
{
        return (&modinfo);
}