xref: /freebsd/usr.bin/iscsictl/periphs.c (revision 8d20be1e22095c27faf8fe8b2f0d089739cc742e)
1 /*
2  * Copyright (c) 1997-2007 Kenneth D. Merry
3  * Copyright (c) 2012 The FreeBSD Foundation
4  * All rights reserved.
5  *
6  * Portions of this software were developed by Edward Tomasz Napierala
7  * under sponsorship from the FreeBSD Foundation.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice, this list of conditions and the following disclaimer.
14  * 2. Redistributions in binary form must reproduce the above copyright
15  *    notice, this list of conditions and the following disclaimer in the
16  *    documentation and/or other materials provided with the distribution.
17  * 3. The name of the author may not be used to endorse or promote products
18  *    derived from this software without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30  * SUCH DAMAGE.
31  */
32 
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
35 
36 #include <sys/ioctl.h>
37 #include <sys/stdint.h>
38 #include <sys/types.h>
39 #include <sys/endian.h>
40 #include <sys/sbuf.h>
41 
42 #include <stdio.h>
43 #include <stdlib.h>
44 #include <string.h>
45 #include <unistd.h>
46 #include <inttypes.h>
47 #include <limits.h>
48 #include <fcntl.h>
49 #include <err.h>
50 
51 #include <cam/cam.h>
52 #include <cam/cam_debug.h>
53 #include <cam/cam_ccb.h>
54 #include <cam/scsi/scsi_all.h>
55 #include <cam/scsi/scsi_da.h>
56 #include <cam/scsi/scsi_pass.h>
57 #include <cam/scsi/scsi_message.h>
58 #include <cam/scsi/smp_all.h>
59 #include <cam/ata/ata_all.h>
60 #include <camlib.h>
61 
62 #include "iscsictl.h"
63 
64 void
65 print_periphs(int session_id)
66 {
67 	union ccb ccb;
68 	int bufsize, fd;
69 	unsigned int i;
70 	int skip_bus, skip_device;
71 
72 	if ((fd = open(XPT_DEVICE, O_RDWR)) == -1) {
73 		warn("couldn't open %s", XPT_DEVICE);
74 		return;
75 	}
76 
77 	/*
78 	 * First, iterate over the whole list to find the bus.
79 	 */
80 
81 	bzero(&ccb, sizeof(union ccb));
82 
83 	ccb.ccb_h.path_id = CAM_XPT_PATH_ID;
84 	ccb.ccb_h.target_id = CAM_TARGET_WILDCARD;
85 	ccb.ccb_h.target_lun = CAM_LUN_WILDCARD;
86 
87 	ccb.ccb_h.func_code = XPT_DEV_MATCH;
88 	bufsize = sizeof(struct dev_match_result) * 100;
89 	ccb.cdm.match_buf_len = bufsize;
90 	ccb.cdm.matches = (struct dev_match_result *)malloc(bufsize);
91 	if (ccb.cdm.matches == NULL) {
92 		warnx("can't malloc memory for matches");
93 		close(fd);
94 		return;
95 	}
96 	ccb.cdm.num_matches = 0;
97 
98 	/*
99 	 * We fetch all nodes, since we display most of them in the default
100 	 * case, and all in the verbose case.
101 	 */
102 	ccb.cdm.num_patterns = 0;
103 	ccb.cdm.pattern_buf_len = 0;
104 
105 	/*
106 	 * We do the ioctl multiple times if necessary, in case there are
107 	 * more than 100 nodes in the EDT.
108 	 */
109 	do {
110 		if (ioctl(fd, CAMIOCOMMAND, &ccb) == -1) {
111 			warn("error sending CAMIOCOMMAND ioctl");
112 			break;
113 		}
114 
115 		if ((ccb.ccb_h.status != CAM_REQ_CMP)
116 		 || ((ccb.cdm.status != CAM_DEV_MATCH_LAST)
117 		    && (ccb.cdm.status != CAM_DEV_MATCH_MORE))) {
118 			warnx("got CAM error %#x, CDM error %d\n",
119 			      ccb.ccb_h.status, ccb.cdm.status);
120 			break;
121 		}
122 
123 		skip_bus = 1;
124 		skip_device = 1;
125 
126 		for (i = 0; i < ccb.cdm.num_matches; i++) {
127 			switch (ccb.cdm.matches[i].type) {
128 			case DEV_MATCH_BUS: {
129 				struct bus_match_result *bus_result;
130 
131 				bus_result = &ccb.cdm.matches[i].result.bus_result;
132 
133 				skip_bus = 1;
134 
135 				if (strcmp(bus_result->dev_name, "iscsi") != 0) {
136 					//printf("not iscsi\n");
137 					continue;
138 				}
139 
140 				if ((int)bus_result->unit_number != session_id) {
141 					//printf("wrong unit, %d != %d\n", bus_result->unit_number, session_id);
142 					continue;
143 				}
144 
145 				skip_bus = 0;
146 			}
147 			case DEV_MATCH_DEVICE: {
148 				skip_device = 1;
149 
150 				if (skip_bus != 0)
151 					continue;
152 
153 				skip_device = 0;
154 
155 				break;
156 			}
157 			case DEV_MATCH_PERIPH: {
158 				struct periph_match_result *periph_result;
159 
160 				periph_result =
161 				      &ccb.cdm.matches[i].result.periph_result;
162 
163 				if (skip_device != 0)
164 					continue;
165 
166 				if (strcmp(periph_result->periph_name, "pass") == 0)
167 					continue;
168 
169 				fprintf(stdout, "%s%d ",
170 					periph_result->periph_name,
171 					periph_result->unit_number);
172 
173 				break;
174 			}
175 			default:
176 				fprintf(stdout, "unknown match type\n");
177 				break;
178 			}
179 		}
180 
181 	} while ((ccb.ccb_h.status == CAM_REQ_CMP)
182 		&& (ccb.cdm.status == CAM_DEV_MATCH_MORE));
183 
184 	close(fd);
185 }
186 
187