/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 1997-2007 Kenneth D. Merry
 * 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.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, 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 DAMAGE.
 */

#include <sys/cdefs.h>
#include <sys/ioctl.h>
#include <sys/stdint.h>
#include <sys/types.h>
#include <sys/endian.h>
#include <sys/sbuf.h>

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <inttypes.h>
#include <limits.h>
#include <fcntl.h>

#include <cam/cam.h>
#include <cam/cam_debug.h>
#include <cam/cam_ccb.h>
#include <cam/scsi/scsi_all.h>
#include <cam/scsi/scsi_da.h>
#include <cam/scsi/scsi_pass.h>
#include <cam/scsi/scsi_message.h>
#include <cam/scsi/smp_all.h>
#include <cam/ata/ata_all.h>
#include <camlib.h>
#include <libxo/xo.h>

#include "iscsictl.h"

void
print_periphs(int session_id)
{
        union ccb ccb;
        int bufsize, fd;
        unsigned int i;
        int have_path_id, skip_bus, skip_device;
        path_id_t path_id;

        if ((fd = open(XPT_DEVICE, O_RDWR)) == -1) {
                xo_warn("couldn't open %s", XPT_DEVICE);
                return;
        }

        /*
         * First, iterate over the whole list to find the bus.
         */

        bzero(&ccb, sizeof(union ccb));

        ccb.ccb_h.path_id = CAM_XPT_PATH_ID;
        ccb.ccb_h.target_id = CAM_TARGET_WILDCARD;
        ccb.ccb_h.target_lun = CAM_LUN_WILDCARD;

        ccb.ccb_h.func_code = XPT_DEV_MATCH;
        bufsize = sizeof(struct dev_match_result) * 100;
        ccb.cdm.match_buf_len = bufsize;
        ccb.cdm.matches = (struct dev_match_result *)malloc(bufsize);
        if (ccb.cdm.matches == NULL) {
                xo_warnx("can't malloc memory for matches");
                close(fd);
                return;
        }
        ccb.cdm.num_matches = 0;

        /*
         * We fetch all nodes, since we display most of them in the default
         * case, and all in the verbose case.
         */
        ccb.cdm.num_patterns = 0;
        ccb.cdm.pattern_buf_len = 0;

        path_id = -1; /* Make GCC happy. */
        have_path_id = 0;
        skip_bus = 1;
        skip_device = 1;

        xo_open_container("devices");
        xo_open_list("lun");
        /*
         * We do the ioctl multiple times if necessary, in case there are
         * more than 100 nodes in the EDT.
         */
        do {
                if (ioctl(fd, CAMIOCOMMAND, &ccb) == -1) {
                        xo_warn("error sending CAMIOCOMMAND ioctl");
                        break;
                }

                if ((ccb.ccb_h.status != CAM_REQ_CMP)
                 || ((ccb.cdm.status != CAM_DEV_MATCH_LAST)
                    && (ccb.cdm.status != CAM_DEV_MATCH_MORE))) {
                        xo_warnx("got CAM error %#x, CDM error %d\n",
                              ccb.ccb_h.status, ccb.cdm.status);
                        break;
                }

                for (i = 0; i < ccb.cdm.num_matches; i++) {
                        switch (ccb.cdm.matches[i].type) {
                        case DEV_MATCH_BUS: {
                                struct bus_match_result *bus_result;

                                bus_result = &ccb.cdm.matches[i].result.bus_result;

                                skip_bus = 1;

                                if (strcmp(bus_result->dev_name, "iscsi") != 0) {
                                        //printf("not iscsi\n");
                                        continue;
                                }

                                if ((int)bus_result->unit_number != session_id) {
                                        //printf("wrong unit, %d != %d\n", bus_result->unit_number, session_id);
                                        continue;
                                }
                                skip_bus = 0;
                        }
                        case DEV_MATCH_DEVICE: {
                                skip_device = 1;

                                if (skip_bus != 0)
                                        continue;

                                skip_device = 0;
                                break;
                        }
                        case DEV_MATCH_PERIPH: {
                                struct periph_match_result *periph_result;

                                periph_result =
                                      &ccb.cdm.matches[i].result.periph_result;

                                if (skip_device != 0)
                                        continue;

                                if (strcmp(periph_result->periph_name, "pass") == 0)
                                        continue;

                                xo_open_instance("lun");
                                xo_emit("{e:lun/%d}", periph_result->target_lun);
                                xo_emit("{Vq:device/%s%d} ",
                                    periph_result->periph_name,
                                    periph_result->unit_number);
                                xo_close_instance("lun");

                                if (have_path_id == 0) {
                                        path_id = periph_result->path_id;
                                        have_path_id = 1;
                                }

                                break;
                        }
                        default:
                                fprintf(stdout, "unknown match type\n");
                                break;
                        }
                }

        } while ((ccb.ccb_h.status == CAM_REQ_CMP)
                && (ccb.cdm.status == CAM_DEV_MATCH_MORE));
        xo_close_list("lun");

        xo_emit("{e:scbus/%d}{e:bus/%d}{e:target/%d}",
                have_path_id ? (int)path_id : -1, 0, have_path_id ? 0 : -1);
        xo_close_container("devices");

        close(fd);
}