Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1 | /******************************************************************************* |
| 2 | * Filename: target_core_fabric_lib.c |
| 3 | * |
| 4 | * This file contains generic high level protocol identifier and PR |
| 5 | * handlers for TCM fabric modules |
| 6 | * |
Nicholas Bellinger | 4c76251 | 2013-09-05 15:29:12 -0700 | [diff] [blame] | 7 | * (c) Copyright 2010-2013 Datera, Inc. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 8 | * |
| 9 | * Nicholas A. Bellinger <nab@linux-iscsi.org> |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License as published by |
| 13 | * the Free Software Foundation; either version 2 of the License, or |
| 14 | * (at your option) any later version. |
| 15 | * |
| 16 | * This program is distributed in the hope that it will be useful, |
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | * GNU General Public License for more details. |
| 20 | * |
| 21 | * You should have received a copy of the GNU General Public License |
| 22 | * along with this program; if not, write to the Free Software |
| 23 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 24 | * |
| 25 | ******************************************************************************/ |
| 26 | |
Christoph Hellwig | 2650d71 | 2015-05-01 17:47:58 +0200 | [diff] [blame] | 27 | /* |
| 28 | * See SPC4, section 7.5 "Protocol specific parameters" for details |
| 29 | * on the formats implemented in this file. |
| 30 | */ |
| 31 | |
Andy Shevchenko | 11650b85 | 2011-07-18 22:26:40 -0700 | [diff] [blame] | 32 | #include <linux/kernel.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 33 | #include <linux/string.h> |
| 34 | #include <linux/ctype.h> |
| 35 | #include <linux/spinlock.h> |
Paul Gortmaker | c53181a | 2011-08-30 18:16:43 -0400 | [diff] [blame] | 36 | #include <linux/export.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 37 | |
Stephen Rothwell | 6546a02a | 2015-06-03 18:16:07 +1000 | [diff] [blame] | 38 | #include <scsi/scsi_proto.h> |
| 39 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 40 | #include <target/target_core_base.h> |
Christoph Hellwig | c4795fb | 2011-11-16 09:46:48 -0500 | [diff] [blame] | 41 | #include <target/target_core_fabric.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 42 | |
Christoph Hellwig | e26d99a | 2011-11-14 12:30:30 -0500 | [diff] [blame] | 43 | #include "target_core_internal.h" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 44 | #include "target_core_pr.h" |
| 45 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 46 | |
Christoph Hellwig | 2650d71 | 2015-05-01 17:47:58 +0200 | [diff] [blame] | 47 | static int sas_get_pr_transport_id( |
| 48 | struct se_node_acl *nacl, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 49 | int *format_code, |
| 50 | unsigned char *buf) |
| 51 | { |
Mimi Zohar | 8c35ad2 | 2011-09-16 08:50:30 -0400 | [diff] [blame] | 52 | int ret; |
Andy Shevchenko | 11650b85 | 2011-07-18 22:26:40 -0700 | [diff] [blame] | 53 | |
Christoph Hellwig | 2650d71 | 2015-05-01 17:47:58 +0200 | [diff] [blame] | 54 | /* Skip over 'naa. prefix */ |
| 55 | ret = hex2bin(&buf[4], &nacl->initiatorname[4], 8); |
| 56 | if (ret) { |
| 57 | pr_debug("%s: invalid hex string\n", __func__); |
| 58 | return ret; |
| 59 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 60 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 61 | return 24; |
| 62 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 63 | |
Christoph Hellwig | 2650d71 | 2015-05-01 17:47:58 +0200 | [diff] [blame] | 64 | static int fc_get_pr_transport_id( |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 65 | struct se_node_acl *se_nacl, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 66 | int *format_code, |
| 67 | unsigned char *buf) |
| 68 | { |
Andy Shevchenko | 11650b85 | 2011-07-18 22:26:40 -0700 | [diff] [blame] | 69 | unsigned char *ptr; |
Mimi Zohar | 8c35ad2 | 2011-09-16 08:50:30 -0400 | [diff] [blame] | 70 | int i, ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 71 | u32 off = 8; |
Mimi Zohar | 8c35ad2 | 2011-09-16 08:50:30 -0400 | [diff] [blame] | 72 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 73 | /* |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 74 | * We convert the ASCII formatted N Port name into a binary |
| 75 | * encoded TransportID. |
| 76 | */ |
| 77 | ptr = &se_nacl->initiatorname[0]; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 78 | for (i = 0; i < 24; ) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 79 | if (!strncmp(&ptr[i], ":", 1)) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 80 | i++; |
| 81 | continue; |
| 82 | } |
Mimi Zohar | 8c35ad2 | 2011-09-16 08:50:30 -0400 | [diff] [blame] | 83 | ret = hex2bin(&buf[off++], &ptr[i], 1); |
Christoph Hellwig | 2650d71 | 2015-05-01 17:47:58 +0200 | [diff] [blame] | 84 | if (ret < 0) { |
| 85 | pr_debug("%s: invalid hex string\n", __func__); |
| 86 | return ret; |
| 87 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 88 | i += 2; |
| 89 | } |
| 90 | /* |
| 91 | * The FC Transport ID is a hardcoded 24-byte length |
| 92 | */ |
| 93 | return 24; |
| 94 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 95 | |
Christoph Hellwig | 2650d71 | 2015-05-01 17:47:58 +0200 | [diff] [blame] | 96 | static int sbp_get_pr_transport_id( |
| 97 | struct se_node_acl *nacl, |
| 98 | int *format_code, |
| 99 | unsigned char *buf) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 100 | { |
Christoph Hellwig | 2650d71 | 2015-05-01 17:47:58 +0200 | [diff] [blame] | 101 | int ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 102 | |
Christoph Hellwig | 2650d71 | 2015-05-01 17:47:58 +0200 | [diff] [blame] | 103 | ret = hex2bin(&buf[8], nacl->initiatorname, 8); |
| 104 | if (ret) { |
| 105 | pr_debug("%s: invalid hex string\n", __func__); |
| 106 | return ret; |
| 107 | } |
| 108 | |
| 109 | return 24; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 110 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 111 | |
Christoph Hellwig | 2650d71 | 2015-05-01 17:47:58 +0200 | [diff] [blame] | 112 | static int srp_get_pr_transport_id( |
| 113 | struct se_node_acl *nacl, |
| 114 | int *format_code, |
| 115 | unsigned char *buf) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 116 | { |
Christoph Hellwig | 2650d71 | 2015-05-01 17:47:58 +0200 | [diff] [blame] | 117 | const char *p; |
| 118 | unsigned len, count, leading_zero_bytes; |
| 119 | int rc; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 120 | |
Christoph Hellwig | 2650d71 | 2015-05-01 17:47:58 +0200 | [diff] [blame] | 121 | p = nacl->initiatorname; |
| 122 | if (strncasecmp(p, "0x", 2) == 0) |
| 123 | p += 2; |
| 124 | len = strlen(p); |
| 125 | if (len % 2) |
| 126 | return -EINVAL; |
| 127 | |
| 128 | count = min(len / 2, 16U); |
| 129 | leading_zero_bytes = 16 - count; |
| 130 | memset(buf + 8, 0, leading_zero_bytes); |
| 131 | rc = hex2bin(buf + 8 + leading_zero_bytes, p, count); |
| 132 | if (rc < 0) { |
Bart Van Assche | 9b6e2c4 | 2019-11-07 13:55:25 -0800 | [diff] [blame] | 133 | pr_debug("hex2bin failed for %s: %d\n", p, rc); |
Christoph Hellwig | 2650d71 | 2015-05-01 17:47:58 +0200 | [diff] [blame] | 134 | return rc; |
| 135 | } |
| 136 | |
| 137 | return 24; |
| 138 | } |
| 139 | |
| 140 | static int iscsi_get_pr_transport_id( |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 141 | struct se_node_acl *se_nacl, |
| 142 | struct t10_pr_registration *pr_reg, |
| 143 | int *format_code, |
| 144 | unsigned char *buf) |
| 145 | { |
| 146 | u32 off = 4, padding = 0; |
| 147 | u16 len = 0; |
| 148 | |
| 149 | spin_lock_irq(&se_nacl->nacl_sess_lock); |
| 150 | /* |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 151 | * From spc4r17 Section 7.5.4.6: TransportID for initiator |
| 152 | * ports using SCSI over iSCSI. |
| 153 | * |
| 154 | * The null-terminated, null-padded (see 4.4.2) ISCSI NAME field |
| 155 | * shall contain the iSCSI name of an iSCSI initiator node (see |
| 156 | * RFC 3720). The first ISCSI NAME field byte containing an ASCII |
| 157 | * null character terminates the ISCSI NAME field without regard for |
| 158 | * the specified length of the iSCSI TransportID or the contents of |
| 159 | * the ADDITIONAL LENGTH field. |
| 160 | */ |
| 161 | len = sprintf(&buf[off], "%s", se_nacl->initiatorname); |
| 162 | /* |
| 163 | * Add Extra byte for NULL terminator |
| 164 | */ |
| 165 | len++; |
| 166 | /* |
| 167 | * If there is ISID present with the registration and *format code == 1 |
| 168 | * 1, use iSCSI Initiator port TransportID format. |
| 169 | * |
| 170 | * Otherwise use iSCSI Initiator device TransportID format that |
| 171 | * does not contain the ASCII encoded iSCSI Initiator iSID value |
| 172 | * provied by the iSCSi Initiator during the iSCSI login process. |
| 173 | */ |
| 174 | if ((*format_code == 1) && (pr_reg->isid_present_at_reg)) { |
| 175 | /* |
| 176 | * Set FORMAT CODE 01b for iSCSI Initiator port TransportID |
| 177 | * format. |
| 178 | */ |
| 179 | buf[0] |= 0x40; |
| 180 | /* |
| 181 | * From spc4r17 Section 7.5.4.6: TransportID for initiator |
| 182 | * ports using SCSI over iSCSI. Table 390 |
| 183 | * |
| 184 | * The SEPARATOR field shall contain the five ASCII |
| 185 | * characters ",i,0x". |
| 186 | * |
| 187 | * The null-terminated, null-padded ISCSI INITIATOR SESSION ID |
| 188 | * field shall contain the iSCSI initiator session identifier |
| 189 | * (see RFC 3720) in the form of ASCII characters that are the |
| 190 | * hexadecimal digits converted from the binary iSCSI initiator |
| 191 | * session identifier value. The first ISCSI INITIATOR SESSION |
| 192 | * ID field byte containing an ASCII null character |
| 193 | */ |
| 194 | buf[off+len] = 0x2c; off++; /* ASCII Character: "," */ |
| 195 | buf[off+len] = 0x69; off++; /* ASCII Character: "i" */ |
| 196 | buf[off+len] = 0x2c; off++; /* ASCII Character: "," */ |
| 197 | buf[off+len] = 0x30; off++; /* ASCII Character: "0" */ |
| 198 | buf[off+len] = 0x78; off++; /* ASCII Character: "x" */ |
| 199 | len += 5; |
| 200 | buf[off+len] = pr_reg->pr_reg_isid[0]; off++; |
| 201 | buf[off+len] = pr_reg->pr_reg_isid[1]; off++; |
| 202 | buf[off+len] = pr_reg->pr_reg_isid[2]; off++; |
| 203 | buf[off+len] = pr_reg->pr_reg_isid[3]; off++; |
| 204 | buf[off+len] = pr_reg->pr_reg_isid[4]; off++; |
| 205 | buf[off+len] = pr_reg->pr_reg_isid[5]; off++; |
| 206 | buf[off+len] = '\0'; off++; |
| 207 | len += 7; |
| 208 | } |
| 209 | spin_unlock_irq(&se_nacl->nacl_sess_lock); |
| 210 | /* |
| 211 | * The ADDITIONAL LENGTH field specifies the number of bytes that follow |
| 212 | * in the TransportID. The additional length shall be at least 20 and |
| 213 | * shall be a multiple of four. |
| 214 | */ |
| 215 | padding = ((-len) & 3); |
| 216 | if (padding != 0) |
| 217 | len += padding; |
| 218 | |
| 219 | buf[2] = ((len >> 8) & 0xff); |
| 220 | buf[3] = (len & 0xff); |
| 221 | /* |
| 222 | * Increment value for total payload + header length for |
| 223 | * full status descriptor |
| 224 | */ |
| 225 | len += 4; |
| 226 | |
| 227 | return len; |
| 228 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 229 | |
Christoph Hellwig | 2650d71 | 2015-05-01 17:47:58 +0200 | [diff] [blame] | 230 | static int iscsi_get_pr_transport_id_len( |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 231 | struct se_node_acl *se_nacl, |
| 232 | struct t10_pr_registration *pr_reg, |
| 233 | int *format_code) |
| 234 | { |
| 235 | u32 len = 0, padding = 0; |
| 236 | |
| 237 | spin_lock_irq(&se_nacl->nacl_sess_lock); |
| 238 | len = strlen(se_nacl->initiatorname); |
| 239 | /* |
| 240 | * Add extra byte for NULL terminator |
| 241 | */ |
| 242 | len++; |
| 243 | /* |
| 244 | * If there is ISID present with the registration, use format code: |
| 245 | * 01b: iSCSI Initiator port TransportID format |
| 246 | * |
| 247 | * If there is not an active iSCSI session, use format code: |
| 248 | * 00b: iSCSI Initiator device TransportID format |
| 249 | */ |
| 250 | if (pr_reg->isid_present_at_reg) { |
Masanari Iida | 35d1efe | 2012-08-16 22:43:13 +0900 | [diff] [blame] | 251 | len += 5; /* For ",i,0x" ASCII separator */ |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 252 | len += 7; /* For iSCSI Initiator Session ID + Null terminator */ |
| 253 | *format_code = 1; |
| 254 | } else |
| 255 | *format_code = 0; |
| 256 | spin_unlock_irq(&se_nacl->nacl_sess_lock); |
| 257 | /* |
| 258 | * The ADDITIONAL LENGTH field specifies the number of bytes that follow |
| 259 | * in the TransportID. The additional length shall be at least 20 and |
| 260 | * shall be a multiple of four. |
| 261 | */ |
| 262 | padding = ((-len) & 3); |
| 263 | if (padding != 0) |
| 264 | len += padding; |
| 265 | /* |
| 266 | * Increment value for total payload + header length for |
| 267 | * full status descriptor |
| 268 | */ |
| 269 | len += 4; |
| 270 | |
| 271 | return len; |
| 272 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 273 | |
Christoph Hellwig | 2650d71 | 2015-05-01 17:47:58 +0200 | [diff] [blame] | 274 | static char *iscsi_parse_pr_out_transport_id( |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 275 | struct se_portal_group *se_tpg, |
| 276 | const char *buf, |
| 277 | u32 *out_tid_len, |
| 278 | char **port_nexus_ptr) |
| 279 | { |
| 280 | char *p; |
| 281 | u32 tid_len, padding; |
| 282 | int i; |
| 283 | u16 add_len; |
| 284 | u8 format_code = (buf[0] & 0xc0); |
| 285 | /* |
| 286 | * Check for FORMAT CODE 00b or 01b from spc4r17, section 7.5.4.6: |
| 287 | * |
| 288 | * TransportID for initiator ports using SCSI over iSCSI, |
| 289 | * from Table 388 -- iSCSI TransportID formats. |
| 290 | * |
| 291 | * 00b Initiator port is identified using the world wide unique |
| 292 | * SCSI device name of the iSCSI initiator |
| 293 | * device containing the initiator port (see table 389). |
| 294 | * 01b Initiator port is identified using the world wide unique |
| 295 | * initiator port identifier (see table 390).10b to 11b |
| 296 | * Reserved |
| 297 | */ |
| 298 | if ((format_code != 0x00) && (format_code != 0x40)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 299 | pr_err("Illegal format code: 0x%02x for iSCSI" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 300 | " Initiator Transport ID\n", format_code); |
| 301 | return NULL; |
| 302 | } |
| 303 | /* |
| 304 | * If the caller wants the TransportID Length, we set that value for the |
| 305 | * entire iSCSI Tarnsport ID now. |
| 306 | */ |
Joern Engel | 68edbce | 2014-09-02 17:49:59 -0400 | [diff] [blame] | 307 | if (out_tid_len) { |
| 308 | /* The shift works thanks to integer promotion rules */ |
| 309 | add_len = (buf[2] << 8) | buf[3]; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 310 | |
Jörn Engel | 8359cf4 | 2011-11-24 02:05:51 +0100 | [diff] [blame] | 311 | tid_len = strlen(&buf[4]); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 312 | tid_len += 4; /* Add four bytes for iSCSI Transport ID header */ |
| 313 | tid_len += 1; /* Add one byte for NULL terminator */ |
| 314 | padding = ((-tid_len) & 3); |
| 315 | if (padding != 0) |
| 316 | tid_len += padding; |
| 317 | |
| 318 | if ((add_len + 4) != tid_len) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 319 | pr_debug("LIO-Target Extracted add_len: %hu " |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 320 | "does not match calculated tid_len: %u," |
| 321 | " using tid_len instead\n", add_len+4, tid_len); |
| 322 | *out_tid_len = tid_len; |
| 323 | } else |
| 324 | *out_tid_len = (add_len + 4); |
| 325 | } |
| 326 | /* |
Masanari Iida | 35d1efe | 2012-08-16 22:43:13 +0900 | [diff] [blame] | 327 | * Check for ',i,0x' separator between iSCSI Name and iSCSI Initiator |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 328 | * Session ID as defined in Table 390 - iSCSI initiator port TransportID |
| 329 | * format. |
| 330 | */ |
| 331 | if (format_code == 0x40) { |
Jörn Engel | 8359cf4 | 2011-11-24 02:05:51 +0100 | [diff] [blame] | 332 | p = strstr(&buf[4], ",i,0x"); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 333 | if (!p) { |
Masanari Iida | 35d1efe | 2012-08-16 22:43:13 +0900 | [diff] [blame] | 334 | pr_err("Unable to locate \",i,0x\" separator" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 335 | " for Initiator port identifier: %s\n", |
Jörn Engel | 8359cf4 | 2011-11-24 02:05:51 +0100 | [diff] [blame] | 336 | &buf[4]); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 337 | return NULL; |
| 338 | } |
| 339 | *p = '\0'; /* Terminate iSCSI Name */ |
Masanari Iida | 35d1efe | 2012-08-16 22:43:13 +0900 | [diff] [blame] | 340 | p += 5; /* Skip over ",i,0x" separator */ |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 341 | |
| 342 | *port_nexus_ptr = p; |
| 343 | /* |
| 344 | * Go ahead and do the lower case conversion of the received |
| 345 | * 12 ASCII characters representing the ISID in the TransportID |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 346 | * for comparison against the running iSCSI session's ISID from |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 347 | * iscsi_target.c:lio_sess_get_initiator_sid() |
| 348 | */ |
| 349 | for (i = 0; i < 12; i++) { |
| 350 | if (isdigit(*p)) { |
| 351 | p++; |
| 352 | continue; |
| 353 | } |
| 354 | *p = tolower(*p); |
| 355 | p++; |
| 356 | } |
| 357 | } |
| 358 | |
| 359 | return (char *)&buf[4]; |
| 360 | } |
Christoph Hellwig | 2650d71 | 2015-05-01 17:47:58 +0200 | [diff] [blame] | 361 | |
| 362 | int target_get_pr_transport_id_len(struct se_node_acl *nacl, |
| 363 | struct t10_pr_registration *pr_reg, int *format_code) |
| 364 | { |
| 365 | switch (nacl->se_tpg->proto_id) { |
| 366 | case SCSI_PROTOCOL_FCP: |
| 367 | case SCSI_PROTOCOL_SBP: |
| 368 | case SCSI_PROTOCOL_SRP: |
| 369 | case SCSI_PROTOCOL_SAS: |
| 370 | break; |
| 371 | case SCSI_PROTOCOL_ISCSI: |
| 372 | return iscsi_get_pr_transport_id_len(nacl, pr_reg, format_code); |
| 373 | default: |
| 374 | pr_err("Unknown proto_id: 0x%02x\n", nacl->se_tpg->proto_id); |
| 375 | return -EINVAL; |
| 376 | } |
| 377 | |
| 378 | /* |
| 379 | * Most transports use a fixed length 24 byte identifier. |
| 380 | */ |
| 381 | *format_code = 0; |
| 382 | return 24; |
| 383 | } |
| 384 | |
| 385 | int target_get_pr_transport_id(struct se_node_acl *nacl, |
| 386 | struct t10_pr_registration *pr_reg, int *format_code, |
| 387 | unsigned char *buf) |
| 388 | { |
| 389 | switch (nacl->se_tpg->proto_id) { |
| 390 | case SCSI_PROTOCOL_SAS: |
| 391 | return sas_get_pr_transport_id(nacl, format_code, buf); |
| 392 | case SCSI_PROTOCOL_SBP: |
| 393 | return sbp_get_pr_transport_id(nacl, format_code, buf); |
| 394 | case SCSI_PROTOCOL_SRP: |
| 395 | return srp_get_pr_transport_id(nacl, format_code, buf); |
| 396 | case SCSI_PROTOCOL_FCP: |
| 397 | return fc_get_pr_transport_id(nacl, format_code, buf); |
| 398 | case SCSI_PROTOCOL_ISCSI: |
| 399 | return iscsi_get_pr_transport_id(nacl, pr_reg, format_code, |
| 400 | buf); |
| 401 | default: |
| 402 | pr_err("Unknown proto_id: 0x%02x\n", nacl->se_tpg->proto_id); |
| 403 | return -EINVAL; |
| 404 | } |
| 405 | } |
| 406 | |
| 407 | const char *target_parse_pr_out_transport_id(struct se_portal_group *tpg, |
| 408 | const char *buf, u32 *out_tid_len, char **port_nexus_ptr) |
| 409 | { |
| 410 | u32 offset; |
| 411 | |
| 412 | switch (tpg->proto_id) { |
| 413 | case SCSI_PROTOCOL_SAS: |
| 414 | /* |
| 415 | * Assume the FORMAT CODE 00b from spc4r17, 7.5.4.7 TransportID |
| 416 | * for initiator ports using SCSI over SAS Serial SCSI Protocol. |
| 417 | */ |
| 418 | offset = 4; |
| 419 | break; |
| 420 | case SCSI_PROTOCOL_SBP: |
| 421 | case SCSI_PROTOCOL_SRP: |
| 422 | case SCSI_PROTOCOL_FCP: |
| 423 | offset = 8; |
| 424 | break; |
| 425 | case SCSI_PROTOCOL_ISCSI: |
| 426 | return iscsi_parse_pr_out_transport_id(tpg, buf, out_tid_len, |
| 427 | port_nexus_ptr); |
| 428 | default: |
| 429 | pr_err("Unknown proto_id: 0x%02x\n", tpg->proto_id); |
| 430 | return NULL; |
| 431 | } |
| 432 | |
| 433 | *port_nexus_ptr = NULL; |
| 434 | *out_tid_len = 24; |
| 435 | return buf + offset; |
| 436 | } |