freebsd-skq/usr.bin/iscsictl/periphs.c

/*
 * 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>
__FBSDID("$FreeBSD$");

#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);
}