1c66ac9dbSNicholas Bellinger /******************************************************************************* 2c66ac9dbSNicholas Bellinger * Filename: target_core_fabric_lib.c 3c66ac9dbSNicholas Bellinger * 4c66ac9dbSNicholas Bellinger * This file contains generic high level protocol identifier and PR 5c66ac9dbSNicholas Bellinger * handlers for TCM fabric modules 6c66ac9dbSNicholas Bellinger * 7c66ac9dbSNicholas Bellinger * Copyright (c) 2010 Rising Tide Systems, Inc. 8c66ac9dbSNicholas Bellinger * Copyright (c) 2010 Linux-iSCSI.org 9c66ac9dbSNicholas Bellinger * 10c66ac9dbSNicholas Bellinger * Nicholas A. Bellinger <nab@linux-iscsi.org> 11c66ac9dbSNicholas Bellinger * 12c66ac9dbSNicholas Bellinger * This program is free software; you can redistribute it and/or modify 13c66ac9dbSNicholas Bellinger * it under the terms of the GNU General Public License as published by 14c66ac9dbSNicholas Bellinger * the Free Software Foundation; either version 2 of the License, or 15c66ac9dbSNicholas Bellinger * (at your option) any later version. 16c66ac9dbSNicholas Bellinger * 17c66ac9dbSNicholas Bellinger * This program is distributed in the hope that it will be useful, 18c66ac9dbSNicholas Bellinger * but WITHOUT ANY WARRANTY; without even the implied warranty of 19c66ac9dbSNicholas Bellinger * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20c66ac9dbSNicholas Bellinger * GNU General Public License for more details. 21c66ac9dbSNicholas Bellinger * 22c66ac9dbSNicholas Bellinger * You should have received a copy of the GNU General Public License 23c66ac9dbSNicholas Bellinger * along with this program; if not, write to the Free Software 24c66ac9dbSNicholas Bellinger * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 25c66ac9dbSNicholas Bellinger * 26c66ac9dbSNicholas Bellinger ******************************************************************************/ 27c66ac9dbSNicholas Bellinger 2811650b85SAndy Shevchenko #include <linux/kernel.h> 29c66ac9dbSNicholas Bellinger #include <linux/string.h> 30c66ac9dbSNicholas Bellinger #include <linux/ctype.h> 31c66ac9dbSNicholas Bellinger #include <linux/spinlock.h> 32c53181afSPaul Gortmaker #include <linux/export.h> 33c66ac9dbSNicholas Bellinger #include <scsi/scsi.h> 34c66ac9dbSNicholas Bellinger #include <scsi/scsi_cmnd.h> 35c66ac9dbSNicholas Bellinger 36c66ac9dbSNicholas Bellinger #include <target/target_core_base.h> 37c4795fb2SChristoph Hellwig #include <target/target_core_fabric.h> 38c66ac9dbSNicholas Bellinger #include <target/target_core_configfs.h> 39c66ac9dbSNicholas Bellinger 40e26d99aeSChristoph Hellwig #include "target_core_internal.h" 41c66ac9dbSNicholas Bellinger #include "target_core_pr.h" 42c66ac9dbSNicholas Bellinger 43c66ac9dbSNicholas Bellinger /* 44c66ac9dbSNicholas Bellinger * Handlers for Serial Attached SCSI (SAS) 45c66ac9dbSNicholas Bellinger */ 46c66ac9dbSNicholas Bellinger u8 sas_get_fabric_proto_ident(struct se_portal_group *se_tpg) 47c66ac9dbSNicholas Bellinger { 48c66ac9dbSNicholas Bellinger /* 49c66ac9dbSNicholas Bellinger * Return a SAS Serial SCSI Protocol identifier for loopback operations 50c66ac9dbSNicholas Bellinger * This is defined in section 7.5.1 Table 362 in spc4r17 51c66ac9dbSNicholas Bellinger */ 52c66ac9dbSNicholas Bellinger return 0x6; 53c66ac9dbSNicholas Bellinger } 54c66ac9dbSNicholas Bellinger EXPORT_SYMBOL(sas_get_fabric_proto_ident); 55c66ac9dbSNicholas Bellinger 56c66ac9dbSNicholas Bellinger u32 sas_get_pr_transport_id( 57c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg, 58c66ac9dbSNicholas Bellinger struct se_node_acl *se_nacl, 59c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 60c66ac9dbSNicholas Bellinger int *format_code, 61c66ac9dbSNicholas Bellinger unsigned char *buf) 62c66ac9dbSNicholas Bellinger { 6311650b85SAndy Shevchenko unsigned char *ptr; 648c35ad20SMimi Zohar int ret; 6511650b85SAndy Shevchenko 66c66ac9dbSNicholas Bellinger /* 67c66ac9dbSNicholas Bellinger * Set PROTOCOL IDENTIFIER to 6h for SAS 68c66ac9dbSNicholas Bellinger */ 69c66ac9dbSNicholas Bellinger buf[0] = 0x06; 70c66ac9dbSNicholas Bellinger /* 71c66ac9dbSNicholas Bellinger * From spc4r17, 7.5.4.7 TransportID for initiator ports using SCSI 72c66ac9dbSNicholas Bellinger * over SAS Serial SCSI Protocol 73c66ac9dbSNicholas Bellinger */ 74c66ac9dbSNicholas Bellinger ptr = &se_nacl->initiatorname[4]; /* Skip over 'naa. prefix */ 75c66ac9dbSNicholas Bellinger 768c35ad20SMimi Zohar ret = hex2bin(&buf[4], ptr, 8); 778c35ad20SMimi Zohar if (ret < 0) 788c35ad20SMimi Zohar pr_debug("sas transport_id: invalid hex string\n"); 7911650b85SAndy Shevchenko 80c66ac9dbSNicholas Bellinger /* 81c66ac9dbSNicholas Bellinger * The SAS Transport ID is a hardcoded 24-byte length 82c66ac9dbSNicholas Bellinger */ 83c66ac9dbSNicholas Bellinger return 24; 84c66ac9dbSNicholas Bellinger } 85c66ac9dbSNicholas Bellinger EXPORT_SYMBOL(sas_get_pr_transport_id); 86c66ac9dbSNicholas Bellinger 87c66ac9dbSNicholas Bellinger u32 sas_get_pr_transport_id_len( 88c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg, 89c66ac9dbSNicholas Bellinger struct se_node_acl *se_nacl, 90c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 91c66ac9dbSNicholas Bellinger int *format_code) 92c66ac9dbSNicholas Bellinger { 93c66ac9dbSNicholas Bellinger *format_code = 0; 94c66ac9dbSNicholas Bellinger /* 95c66ac9dbSNicholas Bellinger * From spc4r17, 7.5.4.7 TransportID for initiator ports using SCSI 96c66ac9dbSNicholas Bellinger * over SAS Serial SCSI Protocol 97c66ac9dbSNicholas Bellinger * 98c66ac9dbSNicholas Bellinger * The SAS Transport ID is a hardcoded 24-byte length 99c66ac9dbSNicholas Bellinger */ 100c66ac9dbSNicholas Bellinger return 24; 101c66ac9dbSNicholas Bellinger } 102c66ac9dbSNicholas Bellinger EXPORT_SYMBOL(sas_get_pr_transport_id_len); 103c66ac9dbSNicholas Bellinger 104c66ac9dbSNicholas Bellinger /* 105c66ac9dbSNicholas Bellinger * Used for handling SCSI fabric dependent TransportIDs in SPC-3 and above 106c66ac9dbSNicholas Bellinger * Persistent Reservation SPEC_I_PT=1 and PROUT REGISTER_AND_MOVE operations. 107c66ac9dbSNicholas Bellinger */ 108c66ac9dbSNicholas Bellinger char *sas_parse_pr_out_transport_id( 109c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg, 110c66ac9dbSNicholas Bellinger const char *buf, 111c66ac9dbSNicholas Bellinger u32 *out_tid_len, 112c66ac9dbSNicholas Bellinger char **port_nexus_ptr) 113c66ac9dbSNicholas Bellinger { 114c66ac9dbSNicholas Bellinger /* 115c66ac9dbSNicholas Bellinger * Assume the FORMAT CODE 00b from spc4r17, 7.5.4.7 TransportID 116c66ac9dbSNicholas Bellinger * for initiator ports using SCSI over SAS Serial SCSI Protocol 117c66ac9dbSNicholas Bellinger * 118c66ac9dbSNicholas Bellinger * The TransportID for a SAS Initiator Port is of fixed size of 119c66ac9dbSNicholas Bellinger * 24 bytes, and SAS does not contain a I_T nexus identifier, 120c66ac9dbSNicholas Bellinger * so we return the **port_nexus_ptr set to NULL. 121c66ac9dbSNicholas Bellinger */ 122c66ac9dbSNicholas Bellinger *port_nexus_ptr = NULL; 123c66ac9dbSNicholas Bellinger *out_tid_len = 24; 124c66ac9dbSNicholas Bellinger 125c66ac9dbSNicholas Bellinger return (char *)&buf[4]; 126c66ac9dbSNicholas Bellinger } 127c66ac9dbSNicholas Bellinger EXPORT_SYMBOL(sas_parse_pr_out_transport_id); 128c66ac9dbSNicholas Bellinger 129c66ac9dbSNicholas Bellinger /* 130c66ac9dbSNicholas Bellinger * Handlers for Fibre Channel Protocol (FCP) 131c66ac9dbSNicholas Bellinger */ 132c66ac9dbSNicholas Bellinger u8 fc_get_fabric_proto_ident(struct se_portal_group *se_tpg) 133c66ac9dbSNicholas Bellinger { 134c66ac9dbSNicholas Bellinger return 0x0; /* 0 = fcp-2 per SPC4 section 7.5.1 */ 135c66ac9dbSNicholas Bellinger } 136c66ac9dbSNicholas Bellinger EXPORT_SYMBOL(fc_get_fabric_proto_ident); 137c66ac9dbSNicholas Bellinger 138c66ac9dbSNicholas Bellinger u32 fc_get_pr_transport_id_len( 139c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg, 140c66ac9dbSNicholas Bellinger struct se_node_acl *se_nacl, 141c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 142c66ac9dbSNicholas Bellinger int *format_code) 143c66ac9dbSNicholas Bellinger { 144c66ac9dbSNicholas Bellinger *format_code = 0; 145c66ac9dbSNicholas Bellinger /* 146c66ac9dbSNicholas Bellinger * The FC Transport ID is a hardcoded 24-byte length 147c66ac9dbSNicholas Bellinger */ 148c66ac9dbSNicholas Bellinger return 24; 149c66ac9dbSNicholas Bellinger } 150c66ac9dbSNicholas Bellinger EXPORT_SYMBOL(fc_get_pr_transport_id_len); 151c66ac9dbSNicholas Bellinger 152c66ac9dbSNicholas Bellinger u32 fc_get_pr_transport_id( 153c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg, 154c66ac9dbSNicholas Bellinger struct se_node_acl *se_nacl, 155c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 156c66ac9dbSNicholas Bellinger int *format_code, 157c66ac9dbSNicholas Bellinger unsigned char *buf) 158c66ac9dbSNicholas Bellinger { 15911650b85SAndy Shevchenko unsigned char *ptr; 1608c35ad20SMimi Zohar int i, ret; 161c66ac9dbSNicholas Bellinger u32 off = 8; 1628c35ad20SMimi Zohar 163c66ac9dbSNicholas Bellinger /* 164c66ac9dbSNicholas Bellinger * PROTOCOL IDENTIFIER is 0h for FCP-2 165c66ac9dbSNicholas Bellinger * 166c66ac9dbSNicholas Bellinger * From spc4r17, 7.5.4.2 TransportID for initiator ports using 167c66ac9dbSNicholas Bellinger * SCSI over Fibre Channel 168c66ac9dbSNicholas Bellinger * 169c66ac9dbSNicholas Bellinger * We convert the ASCII formatted N Port name into a binary 170c66ac9dbSNicholas Bellinger * encoded TransportID. 171c66ac9dbSNicholas Bellinger */ 172c66ac9dbSNicholas Bellinger ptr = &se_nacl->initiatorname[0]; 173c66ac9dbSNicholas Bellinger 174c66ac9dbSNicholas Bellinger for (i = 0; i < 24; ) { 1756708bb27SAndy Grover if (!strncmp(&ptr[i], ":", 1)) { 176c66ac9dbSNicholas Bellinger i++; 177c66ac9dbSNicholas Bellinger continue; 178c66ac9dbSNicholas Bellinger } 1798c35ad20SMimi Zohar ret = hex2bin(&buf[off++], &ptr[i], 1); 1808c35ad20SMimi Zohar if (ret < 0) 1818c35ad20SMimi Zohar pr_debug("fc transport_id: invalid hex string\n"); 182c66ac9dbSNicholas Bellinger i += 2; 183c66ac9dbSNicholas Bellinger } 184c66ac9dbSNicholas Bellinger /* 185c66ac9dbSNicholas Bellinger * The FC Transport ID is a hardcoded 24-byte length 186c66ac9dbSNicholas Bellinger */ 187c66ac9dbSNicholas Bellinger return 24; 188c66ac9dbSNicholas Bellinger } 189c66ac9dbSNicholas Bellinger EXPORT_SYMBOL(fc_get_pr_transport_id); 190c66ac9dbSNicholas Bellinger 191c66ac9dbSNicholas Bellinger char *fc_parse_pr_out_transport_id( 192c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg, 193c66ac9dbSNicholas Bellinger const char *buf, 194c66ac9dbSNicholas Bellinger u32 *out_tid_len, 195c66ac9dbSNicholas Bellinger char **port_nexus_ptr) 196c66ac9dbSNicholas Bellinger { 197c66ac9dbSNicholas Bellinger /* 198c66ac9dbSNicholas Bellinger * The TransportID for a FC N Port is of fixed size of 199c66ac9dbSNicholas Bellinger * 24 bytes, and FC does not contain a I_T nexus identifier, 200c66ac9dbSNicholas Bellinger * so we return the **port_nexus_ptr set to NULL. 201c66ac9dbSNicholas Bellinger */ 202c66ac9dbSNicholas Bellinger *port_nexus_ptr = NULL; 203c66ac9dbSNicholas Bellinger *out_tid_len = 24; 204c66ac9dbSNicholas Bellinger 205c66ac9dbSNicholas Bellinger return (char *)&buf[8]; 206c66ac9dbSNicholas Bellinger } 207c66ac9dbSNicholas Bellinger EXPORT_SYMBOL(fc_parse_pr_out_transport_id); 208c66ac9dbSNicholas Bellinger 209c66ac9dbSNicholas Bellinger /* 210c66ac9dbSNicholas Bellinger * Handlers for Internet Small Computer Systems Interface (iSCSI) 211c66ac9dbSNicholas Bellinger */ 212c66ac9dbSNicholas Bellinger 213c66ac9dbSNicholas Bellinger u8 iscsi_get_fabric_proto_ident(struct se_portal_group *se_tpg) 214c66ac9dbSNicholas Bellinger { 215c66ac9dbSNicholas Bellinger /* 216c66ac9dbSNicholas Bellinger * This value is defined for "Internet SCSI (iSCSI)" 217c66ac9dbSNicholas Bellinger * in spc4r17 section 7.5.1 Table 362 218c66ac9dbSNicholas Bellinger */ 219c66ac9dbSNicholas Bellinger return 0x5; 220c66ac9dbSNicholas Bellinger } 221c66ac9dbSNicholas Bellinger EXPORT_SYMBOL(iscsi_get_fabric_proto_ident); 222c66ac9dbSNicholas Bellinger 223c66ac9dbSNicholas Bellinger u32 iscsi_get_pr_transport_id( 224c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg, 225c66ac9dbSNicholas Bellinger struct se_node_acl *se_nacl, 226c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 227c66ac9dbSNicholas Bellinger int *format_code, 228c66ac9dbSNicholas Bellinger unsigned char *buf) 229c66ac9dbSNicholas Bellinger { 230c66ac9dbSNicholas Bellinger u32 off = 4, padding = 0; 231c66ac9dbSNicholas Bellinger u16 len = 0; 232c66ac9dbSNicholas Bellinger 233c66ac9dbSNicholas Bellinger spin_lock_irq(&se_nacl->nacl_sess_lock); 234c66ac9dbSNicholas Bellinger /* 235c66ac9dbSNicholas Bellinger * Set PROTOCOL IDENTIFIER to 5h for iSCSI 236c66ac9dbSNicholas Bellinger */ 237c66ac9dbSNicholas Bellinger buf[0] = 0x05; 238c66ac9dbSNicholas Bellinger /* 239c66ac9dbSNicholas Bellinger * From spc4r17 Section 7.5.4.6: TransportID for initiator 240c66ac9dbSNicholas Bellinger * ports using SCSI over iSCSI. 241c66ac9dbSNicholas Bellinger * 242c66ac9dbSNicholas Bellinger * The null-terminated, null-padded (see 4.4.2) ISCSI NAME field 243c66ac9dbSNicholas Bellinger * shall contain the iSCSI name of an iSCSI initiator node (see 244c66ac9dbSNicholas Bellinger * RFC 3720). The first ISCSI NAME field byte containing an ASCII 245c66ac9dbSNicholas Bellinger * null character terminates the ISCSI NAME field without regard for 246c66ac9dbSNicholas Bellinger * the specified length of the iSCSI TransportID or the contents of 247c66ac9dbSNicholas Bellinger * the ADDITIONAL LENGTH field. 248c66ac9dbSNicholas Bellinger */ 249c66ac9dbSNicholas Bellinger len = sprintf(&buf[off], "%s", se_nacl->initiatorname); 250c66ac9dbSNicholas Bellinger /* 251c66ac9dbSNicholas Bellinger * Add Extra byte for NULL terminator 252c66ac9dbSNicholas Bellinger */ 253c66ac9dbSNicholas Bellinger len++; 254c66ac9dbSNicholas Bellinger /* 255c66ac9dbSNicholas Bellinger * If there is ISID present with the registration and *format code == 1 256c66ac9dbSNicholas Bellinger * 1, use iSCSI Initiator port TransportID format. 257c66ac9dbSNicholas Bellinger * 258c66ac9dbSNicholas Bellinger * Otherwise use iSCSI Initiator device TransportID format that 259c66ac9dbSNicholas Bellinger * does not contain the ASCII encoded iSCSI Initiator iSID value 260c66ac9dbSNicholas Bellinger * provied by the iSCSi Initiator during the iSCSI login process. 261c66ac9dbSNicholas Bellinger */ 262c66ac9dbSNicholas Bellinger if ((*format_code == 1) && (pr_reg->isid_present_at_reg)) { 263c66ac9dbSNicholas Bellinger /* 264c66ac9dbSNicholas Bellinger * Set FORMAT CODE 01b for iSCSI Initiator port TransportID 265c66ac9dbSNicholas Bellinger * format. 266c66ac9dbSNicholas Bellinger */ 267c66ac9dbSNicholas Bellinger buf[0] |= 0x40; 268c66ac9dbSNicholas Bellinger /* 269c66ac9dbSNicholas Bellinger * From spc4r17 Section 7.5.4.6: TransportID for initiator 270c66ac9dbSNicholas Bellinger * ports using SCSI over iSCSI. Table 390 271c66ac9dbSNicholas Bellinger * 272c66ac9dbSNicholas Bellinger * The SEPARATOR field shall contain the five ASCII 273c66ac9dbSNicholas Bellinger * characters ",i,0x". 274c66ac9dbSNicholas Bellinger * 275c66ac9dbSNicholas Bellinger * The null-terminated, null-padded ISCSI INITIATOR SESSION ID 276c66ac9dbSNicholas Bellinger * field shall contain the iSCSI initiator session identifier 277c66ac9dbSNicholas Bellinger * (see RFC 3720) in the form of ASCII characters that are the 278c66ac9dbSNicholas Bellinger * hexadecimal digits converted from the binary iSCSI initiator 279c66ac9dbSNicholas Bellinger * session identifier value. The first ISCSI INITIATOR SESSION 280c66ac9dbSNicholas Bellinger * ID field byte containing an ASCII null character 281c66ac9dbSNicholas Bellinger */ 282c66ac9dbSNicholas Bellinger buf[off+len] = 0x2c; off++; /* ASCII Character: "," */ 283c66ac9dbSNicholas Bellinger buf[off+len] = 0x69; off++; /* ASCII Character: "i" */ 284c66ac9dbSNicholas Bellinger buf[off+len] = 0x2c; off++; /* ASCII Character: "," */ 285c66ac9dbSNicholas Bellinger buf[off+len] = 0x30; off++; /* ASCII Character: "0" */ 286c66ac9dbSNicholas Bellinger buf[off+len] = 0x78; off++; /* ASCII Character: "x" */ 287c66ac9dbSNicholas Bellinger len += 5; 288c66ac9dbSNicholas Bellinger buf[off+len] = pr_reg->pr_reg_isid[0]; off++; 289c66ac9dbSNicholas Bellinger buf[off+len] = pr_reg->pr_reg_isid[1]; off++; 290c66ac9dbSNicholas Bellinger buf[off+len] = pr_reg->pr_reg_isid[2]; off++; 291c66ac9dbSNicholas Bellinger buf[off+len] = pr_reg->pr_reg_isid[3]; off++; 292c66ac9dbSNicholas Bellinger buf[off+len] = pr_reg->pr_reg_isid[4]; off++; 293c66ac9dbSNicholas Bellinger buf[off+len] = pr_reg->pr_reg_isid[5]; off++; 294c66ac9dbSNicholas Bellinger buf[off+len] = '\0'; off++; 295c66ac9dbSNicholas Bellinger len += 7; 296c66ac9dbSNicholas Bellinger } 297c66ac9dbSNicholas Bellinger spin_unlock_irq(&se_nacl->nacl_sess_lock); 298c66ac9dbSNicholas Bellinger /* 299c66ac9dbSNicholas Bellinger * The ADDITIONAL LENGTH field specifies the number of bytes that follow 300c66ac9dbSNicholas Bellinger * in the TransportID. The additional length shall be at least 20 and 301c66ac9dbSNicholas Bellinger * shall be a multiple of four. 302c66ac9dbSNicholas Bellinger */ 303c66ac9dbSNicholas Bellinger padding = ((-len) & 3); 304c66ac9dbSNicholas Bellinger if (padding != 0) 305c66ac9dbSNicholas Bellinger len += padding; 306c66ac9dbSNicholas Bellinger 307c66ac9dbSNicholas Bellinger buf[2] = ((len >> 8) & 0xff); 308c66ac9dbSNicholas Bellinger buf[3] = (len & 0xff); 309c66ac9dbSNicholas Bellinger /* 310c66ac9dbSNicholas Bellinger * Increment value for total payload + header length for 311c66ac9dbSNicholas Bellinger * full status descriptor 312c66ac9dbSNicholas Bellinger */ 313c66ac9dbSNicholas Bellinger len += 4; 314c66ac9dbSNicholas Bellinger 315c66ac9dbSNicholas Bellinger return len; 316c66ac9dbSNicholas Bellinger } 317c66ac9dbSNicholas Bellinger EXPORT_SYMBOL(iscsi_get_pr_transport_id); 318c66ac9dbSNicholas Bellinger 319c66ac9dbSNicholas Bellinger u32 iscsi_get_pr_transport_id_len( 320c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg, 321c66ac9dbSNicholas Bellinger struct se_node_acl *se_nacl, 322c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 323c66ac9dbSNicholas Bellinger int *format_code) 324c66ac9dbSNicholas Bellinger { 325c66ac9dbSNicholas Bellinger u32 len = 0, padding = 0; 326c66ac9dbSNicholas Bellinger 327c66ac9dbSNicholas Bellinger spin_lock_irq(&se_nacl->nacl_sess_lock); 328c66ac9dbSNicholas Bellinger len = strlen(se_nacl->initiatorname); 329c66ac9dbSNicholas Bellinger /* 330c66ac9dbSNicholas Bellinger * Add extra byte for NULL terminator 331c66ac9dbSNicholas Bellinger */ 332c66ac9dbSNicholas Bellinger len++; 333c66ac9dbSNicholas Bellinger /* 334c66ac9dbSNicholas Bellinger * If there is ISID present with the registration, use format code: 335c66ac9dbSNicholas Bellinger * 01b: iSCSI Initiator port TransportID format 336c66ac9dbSNicholas Bellinger * 337c66ac9dbSNicholas Bellinger * If there is not an active iSCSI session, use format code: 338c66ac9dbSNicholas Bellinger * 00b: iSCSI Initiator device TransportID format 339c66ac9dbSNicholas Bellinger */ 340c66ac9dbSNicholas Bellinger if (pr_reg->isid_present_at_reg) { 341c66ac9dbSNicholas Bellinger len += 5; /* For ",i,0x" ASCII seperator */ 342c66ac9dbSNicholas Bellinger len += 7; /* For iSCSI Initiator Session ID + Null terminator */ 343c66ac9dbSNicholas Bellinger *format_code = 1; 344c66ac9dbSNicholas Bellinger } else 345c66ac9dbSNicholas Bellinger *format_code = 0; 346c66ac9dbSNicholas Bellinger spin_unlock_irq(&se_nacl->nacl_sess_lock); 347c66ac9dbSNicholas Bellinger /* 348c66ac9dbSNicholas Bellinger * The ADDITIONAL LENGTH field specifies the number of bytes that follow 349c66ac9dbSNicholas Bellinger * in the TransportID. The additional length shall be at least 20 and 350c66ac9dbSNicholas Bellinger * shall be a multiple of four. 351c66ac9dbSNicholas Bellinger */ 352c66ac9dbSNicholas Bellinger padding = ((-len) & 3); 353c66ac9dbSNicholas Bellinger if (padding != 0) 354c66ac9dbSNicholas Bellinger len += padding; 355c66ac9dbSNicholas Bellinger /* 356c66ac9dbSNicholas Bellinger * Increment value for total payload + header length for 357c66ac9dbSNicholas Bellinger * full status descriptor 358c66ac9dbSNicholas Bellinger */ 359c66ac9dbSNicholas Bellinger len += 4; 360c66ac9dbSNicholas Bellinger 361c66ac9dbSNicholas Bellinger return len; 362c66ac9dbSNicholas Bellinger } 363c66ac9dbSNicholas Bellinger EXPORT_SYMBOL(iscsi_get_pr_transport_id_len); 364c66ac9dbSNicholas Bellinger 365c66ac9dbSNicholas Bellinger char *iscsi_parse_pr_out_transport_id( 366c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg, 367c66ac9dbSNicholas Bellinger const char *buf, 368c66ac9dbSNicholas Bellinger u32 *out_tid_len, 369c66ac9dbSNicholas Bellinger char **port_nexus_ptr) 370c66ac9dbSNicholas Bellinger { 371c66ac9dbSNicholas Bellinger char *p; 372c66ac9dbSNicholas Bellinger u32 tid_len, padding; 373c66ac9dbSNicholas Bellinger int i; 374c66ac9dbSNicholas Bellinger u16 add_len; 375c66ac9dbSNicholas Bellinger u8 format_code = (buf[0] & 0xc0); 376c66ac9dbSNicholas Bellinger /* 377c66ac9dbSNicholas Bellinger * Check for FORMAT CODE 00b or 01b from spc4r17, section 7.5.4.6: 378c66ac9dbSNicholas Bellinger * 379c66ac9dbSNicholas Bellinger * TransportID for initiator ports using SCSI over iSCSI, 380c66ac9dbSNicholas Bellinger * from Table 388 -- iSCSI TransportID formats. 381c66ac9dbSNicholas Bellinger * 382c66ac9dbSNicholas Bellinger * 00b Initiator port is identified using the world wide unique 383c66ac9dbSNicholas Bellinger * SCSI device name of the iSCSI initiator 384c66ac9dbSNicholas Bellinger * device containing the initiator port (see table 389). 385c66ac9dbSNicholas Bellinger * 01b Initiator port is identified using the world wide unique 386c66ac9dbSNicholas Bellinger * initiator port identifier (see table 390).10b to 11b 387c66ac9dbSNicholas Bellinger * Reserved 388c66ac9dbSNicholas Bellinger */ 389c66ac9dbSNicholas Bellinger if ((format_code != 0x00) && (format_code != 0x40)) { 3906708bb27SAndy Grover pr_err("Illegal format code: 0x%02x for iSCSI" 391c66ac9dbSNicholas Bellinger " Initiator Transport ID\n", format_code); 392c66ac9dbSNicholas Bellinger return NULL; 393c66ac9dbSNicholas Bellinger } 394c66ac9dbSNicholas Bellinger /* 395c66ac9dbSNicholas Bellinger * If the caller wants the TransportID Length, we set that value for the 396c66ac9dbSNicholas Bellinger * entire iSCSI Tarnsport ID now. 397c66ac9dbSNicholas Bellinger */ 398c66ac9dbSNicholas Bellinger if (out_tid_len != NULL) { 399c66ac9dbSNicholas Bellinger add_len = ((buf[2] >> 8) & 0xff); 400c66ac9dbSNicholas Bellinger add_len |= (buf[3] & 0xff); 401c66ac9dbSNicholas Bellinger 402c66ac9dbSNicholas Bellinger tid_len = strlen((char *)&buf[4]); 403c66ac9dbSNicholas Bellinger tid_len += 4; /* Add four bytes for iSCSI Transport ID header */ 404c66ac9dbSNicholas Bellinger tid_len += 1; /* Add one byte for NULL terminator */ 405c66ac9dbSNicholas Bellinger padding = ((-tid_len) & 3); 406c66ac9dbSNicholas Bellinger if (padding != 0) 407c66ac9dbSNicholas Bellinger tid_len += padding; 408c66ac9dbSNicholas Bellinger 409c66ac9dbSNicholas Bellinger if ((add_len + 4) != tid_len) { 4106708bb27SAndy Grover pr_debug("LIO-Target Extracted add_len: %hu " 411c66ac9dbSNicholas Bellinger "does not match calculated tid_len: %u," 412c66ac9dbSNicholas Bellinger " using tid_len instead\n", add_len+4, tid_len); 413c66ac9dbSNicholas Bellinger *out_tid_len = tid_len; 414c66ac9dbSNicholas Bellinger } else 415c66ac9dbSNicholas Bellinger *out_tid_len = (add_len + 4); 416c66ac9dbSNicholas Bellinger } 417c66ac9dbSNicholas Bellinger /* 418c66ac9dbSNicholas Bellinger * Check for ',i,0x' seperator between iSCSI Name and iSCSI Initiator 419c66ac9dbSNicholas Bellinger * Session ID as defined in Table 390 - iSCSI initiator port TransportID 420c66ac9dbSNicholas Bellinger * format. 421c66ac9dbSNicholas Bellinger */ 422c66ac9dbSNicholas Bellinger if (format_code == 0x40) { 423c66ac9dbSNicholas Bellinger p = strstr((char *)&buf[4], ",i,0x"); 4246708bb27SAndy Grover if (!p) { 4256708bb27SAndy Grover pr_err("Unable to locate \",i,0x\" seperator" 426c66ac9dbSNicholas Bellinger " for Initiator port identifier: %s\n", 427c66ac9dbSNicholas Bellinger (char *)&buf[4]); 428c66ac9dbSNicholas Bellinger return NULL; 429c66ac9dbSNicholas Bellinger } 430c66ac9dbSNicholas Bellinger *p = '\0'; /* Terminate iSCSI Name */ 431c66ac9dbSNicholas Bellinger p += 5; /* Skip over ",i,0x" seperator */ 432c66ac9dbSNicholas Bellinger 433c66ac9dbSNicholas Bellinger *port_nexus_ptr = p; 434c66ac9dbSNicholas Bellinger /* 435c66ac9dbSNicholas Bellinger * Go ahead and do the lower case conversion of the received 436c66ac9dbSNicholas Bellinger * 12 ASCII characters representing the ISID in the TransportID 43725985edcSLucas De Marchi * for comparison against the running iSCSI session's ISID from 438c66ac9dbSNicholas Bellinger * iscsi_target.c:lio_sess_get_initiator_sid() 439c66ac9dbSNicholas Bellinger */ 440c66ac9dbSNicholas Bellinger for (i = 0; i < 12; i++) { 441c66ac9dbSNicholas Bellinger if (isdigit(*p)) { 442c66ac9dbSNicholas Bellinger p++; 443c66ac9dbSNicholas Bellinger continue; 444c66ac9dbSNicholas Bellinger } 445c66ac9dbSNicholas Bellinger *p = tolower(*p); 446c66ac9dbSNicholas Bellinger p++; 447c66ac9dbSNicholas Bellinger } 448c66ac9dbSNicholas Bellinger } 449c66ac9dbSNicholas Bellinger 450c66ac9dbSNicholas Bellinger return (char *)&buf[4]; 451c66ac9dbSNicholas Bellinger } 452c66ac9dbSNicholas Bellinger EXPORT_SYMBOL(iscsi_parse_pr_out_transport_id); 453