1c66ac9dbSNicholas Bellinger /******************************************************************************* 2c66ac9dbSNicholas Bellinger * Filename: target_core_pr.c 3c66ac9dbSNicholas Bellinger * 4c66ac9dbSNicholas Bellinger * This file contains SPC-3 compliant persistent reservations and 5c66ac9dbSNicholas Bellinger * legacy SPC-2 reservations with compatible reservation handling (CRH=1) 6c66ac9dbSNicholas Bellinger * 74c76251eSNicholas Bellinger * (c) Copyright 2009-2013 Datera, Inc. 8c66ac9dbSNicholas Bellinger * 9c66ac9dbSNicholas Bellinger * Nicholas A. Bellinger <nab@kernel.org> 10c66ac9dbSNicholas Bellinger * 11c66ac9dbSNicholas Bellinger * This program is free software; you can redistribute it and/or modify 12c66ac9dbSNicholas Bellinger * it under the terms of the GNU General Public License as published by 13c66ac9dbSNicholas Bellinger * the Free Software Foundation; either version 2 of the License, or 14c66ac9dbSNicholas Bellinger * (at your option) any later version. 15c66ac9dbSNicholas Bellinger * 16c66ac9dbSNicholas Bellinger * This program is distributed in the hope that it will be useful, 17c66ac9dbSNicholas Bellinger * but WITHOUT ANY WARRANTY; without even the implied warranty of 18c66ac9dbSNicholas Bellinger * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19c66ac9dbSNicholas Bellinger * GNU General Public License for more details. 20c66ac9dbSNicholas Bellinger * 21c66ac9dbSNicholas Bellinger * You should have received a copy of the GNU General Public License 22c66ac9dbSNicholas Bellinger * along with this program; if not, write to the Free Software 23c66ac9dbSNicholas Bellinger * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 24c66ac9dbSNicholas Bellinger * 25c66ac9dbSNicholas Bellinger ******************************************************************************/ 26c66ac9dbSNicholas Bellinger 27c66ac9dbSNicholas Bellinger #include <linux/slab.h> 28c66ac9dbSNicholas Bellinger #include <linux/spinlock.h> 29c66ac9dbSNicholas Bellinger #include <linux/list.h> 300e9b10a9SAl Viro #include <linux/file.h> 31c66ac9dbSNicholas Bellinger #include <scsi/scsi.h> 32c66ac9dbSNicholas Bellinger #include <scsi/scsi_cmnd.h> 33c66ac9dbSNicholas Bellinger #include <asm/unaligned.h> 34c66ac9dbSNicholas Bellinger 35c66ac9dbSNicholas Bellinger #include <target/target_core_base.h> 36c4795fb2SChristoph Hellwig #include <target/target_core_backend.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 #include "target_core_ua.h" 43c66ac9dbSNicholas Bellinger 44c66ac9dbSNicholas Bellinger /* 45c66ac9dbSNicholas Bellinger * Used for Specify Initiator Ports Capable Bit (SPEC_I_PT) 46c66ac9dbSNicholas Bellinger */ 47c66ac9dbSNicholas Bellinger struct pr_transport_id_holder { 48c66ac9dbSNicholas Bellinger int dest_local_nexus; 49c66ac9dbSNicholas Bellinger struct t10_pr_registration *dest_pr_reg; 50c66ac9dbSNicholas Bellinger struct se_portal_group *dest_tpg; 51c66ac9dbSNicholas Bellinger struct se_node_acl *dest_node_acl; 52c66ac9dbSNicholas Bellinger struct se_dev_entry *dest_se_deve; 53c66ac9dbSNicholas Bellinger struct list_head dest_list; 54c66ac9dbSNicholas Bellinger }; 55c66ac9dbSNicholas Bellinger 56d2843c17SAndy Grover void core_pr_dump_initiator_port( 57c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 58c66ac9dbSNicholas Bellinger char *buf, 59c66ac9dbSNicholas Bellinger u32 size) 60c66ac9dbSNicholas Bellinger { 616708bb27SAndy Grover if (!pr_reg->isid_present_at_reg) 62d2843c17SAndy Grover buf[0] = '\0'; 63c66ac9dbSNicholas Bellinger 64d2843c17SAndy Grover snprintf(buf, size, ",i,0x%s", pr_reg->pr_reg_isid); 65c66ac9dbSNicholas Bellinger } 66c66ac9dbSNicholas Bellinger 6733ce6a87SAndy Grover enum register_type { 6833ce6a87SAndy Grover REGISTER, 6933ce6a87SAndy Grover REGISTER_AND_IGNORE_EXISTING_KEY, 7033ce6a87SAndy Grover REGISTER_AND_MOVE, 7133ce6a87SAndy Grover }; 7233ce6a87SAndy Grover 7333ce6a87SAndy Grover enum preempt_type { 7433ce6a87SAndy Grover PREEMPT, 7533ce6a87SAndy Grover PREEMPT_AND_ABORT, 7633ce6a87SAndy Grover }; 7733ce6a87SAndy Grover 78c66ac9dbSNicholas Bellinger static void __core_scsi3_complete_pro_release(struct se_device *, struct se_node_acl *, 79c66ac9dbSNicholas Bellinger struct t10_pr_registration *, int); 80c66ac9dbSNicholas Bellinger 81de103c93SChristoph Hellwig static sense_reason_t 82de103c93SChristoph Hellwig target_scsi2_reservation_check(struct se_cmd *cmd) 83c66ac9dbSNicholas Bellinger { 84d977f437SChristoph Hellwig struct se_device *dev = cmd->se_dev; 85d977f437SChristoph Hellwig struct se_session *sess = cmd->se_sess; 86d977f437SChristoph Hellwig 87d977f437SChristoph Hellwig switch (cmd->t_task_cdb[0]) { 88c66ac9dbSNicholas Bellinger case INQUIRY: 89c66ac9dbSNicholas Bellinger case RELEASE: 90c66ac9dbSNicholas Bellinger case RELEASE_10: 91c66ac9dbSNicholas Bellinger return 0; 92c66ac9dbSNicholas Bellinger default: 93d977f437SChristoph Hellwig break; 94c66ac9dbSNicholas Bellinger } 95c66ac9dbSNicholas Bellinger 96d977f437SChristoph Hellwig if (!dev->dev_reserved_node_acl || !sess) 97c66ac9dbSNicholas Bellinger return 0; 98c66ac9dbSNicholas Bellinger 99d977f437SChristoph Hellwig if (dev->dev_reserved_node_acl != sess->se_node_acl) 100de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 101c66ac9dbSNicholas Bellinger 102d977f437SChristoph Hellwig if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS_WITH_ISID) { 103d977f437SChristoph Hellwig if (dev->dev_res_bin_isid != sess->sess_bin_isid) 104de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 105d977f437SChristoph Hellwig } 106d977f437SChristoph Hellwig 107d977f437SChristoph Hellwig return 0; 108c66ac9dbSNicholas Bellinger } 109c66ac9dbSNicholas Bellinger 110eacac00cSChristoph Hellwig static struct t10_pr_registration *core_scsi3_locate_pr_reg(struct se_device *, 111eacac00cSChristoph Hellwig struct se_node_acl *, struct se_session *); 112eacac00cSChristoph Hellwig static void core_scsi3_put_pr_reg(struct t10_pr_registration *); 113eacac00cSChristoph Hellwig 114087a03b3SNicholas Bellinger static int target_check_scsi2_reservation_conflict(struct se_cmd *cmd) 115eacac00cSChristoph Hellwig { 116eacac00cSChristoph Hellwig struct se_session *se_sess = cmd->se_sess; 1170fd97ccfSChristoph Hellwig struct se_device *dev = cmd->se_dev; 118eacac00cSChristoph Hellwig struct t10_pr_registration *pr_reg; 1190fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 120eacac00cSChristoph Hellwig int conflict = 0; 121eacac00cSChristoph Hellwig 122eacac00cSChristoph Hellwig pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, 123eacac00cSChristoph Hellwig se_sess); 124eacac00cSChristoph Hellwig if (pr_reg) { 125eacac00cSChristoph Hellwig /* 126eacac00cSChristoph Hellwig * From spc4r17 5.7.3 Exceptions to SPC-2 RESERVE and RELEASE 127eacac00cSChristoph Hellwig * behavior 128eacac00cSChristoph Hellwig * 129eacac00cSChristoph Hellwig * A RESERVE(6) or RESERVE(10) command shall complete with GOOD 130eacac00cSChristoph Hellwig * status, but no reservation shall be established and the 131eacac00cSChristoph Hellwig * persistent reservation shall not be changed, if the command 132eacac00cSChristoph Hellwig * is received from a) and b) below. 133eacac00cSChristoph Hellwig * 134eacac00cSChristoph Hellwig * A RELEASE(6) or RELEASE(10) command shall complete with GOOD 135eacac00cSChristoph Hellwig * status, but the persistent reservation shall not be released, 136eacac00cSChristoph Hellwig * if the command is received from a) and b) 137eacac00cSChristoph Hellwig * 138eacac00cSChristoph Hellwig * a) An I_T nexus that is a persistent reservation holder; or 139eacac00cSChristoph Hellwig * b) An I_T nexus that is registered if a registrants only or 140eacac00cSChristoph Hellwig * all registrants type persistent reservation is present. 141eacac00cSChristoph Hellwig * 142eacac00cSChristoph Hellwig * In all other cases, a RESERVE(6) command, RESERVE(10) command, 143eacac00cSChristoph Hellwig * RELEASE(6) command, or RELEASE(10) command shall be processed 144eacac00cSChristoph Hellwig * as defined in SPC-2. 145eacac00cSChristoph Hellwig */ 146eacac00cSChristoph Hellwig if (pr_reg->pr_res_holder) { 147eacac00cSChristoph Hellwig core_scsi3_put_pr_reg(pr_reg); 148087a03b3SNicholas Bellinger return 1; 149eacac00cSChristoph Hellwig } 150eacac00cSChristoph Hellwig if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY) || 151eacac00cSChristoph Hellwig (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) || 152eacac00cSChristoph Hellwig (pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 153eacac00cSChristoph Hellwig (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { 154eacac00cSChristoph Hellwig core_scsi3_put_pr_reg(pr_reg); 155087a03b3SNicholas Bellinger return 1; 156eacac00cSChristoph Hellwig } 157eacac00cSChristoph Hellwig core_scsi3_put_pr_reg(pr_reg); 158eacac00cSChristoph Hellwig conflict = 1; 159eacac00cSChristoph Hellwig } else { 160eacac00cSChristoph Hellwig /* 161eacac00cSChristoph Hellwig * Following spc2r20 5.5.1 Reservations overview: 162eacac00cSChristoph Hellwig * 163eacac00cSChristoph Hellwig * If a logical unit has executed a PERSISTENT RESERVE OUT 164eacac00cSChristoph Hellwig * command with the REGISTER or the REGISTER AND IGNORE 165eacac00cSChristoph Hellwig * EXISTING KEY service action and is still registered by any 166eacac00cSChristoph Hellwig * initiator, all RESERVE commands and all RELEASE commands 167eacac00cSChristoph Hellwig * regardless of initiator shall conflict and shall terminate 168eacac00cSChristoph Hellwig * with a RESERVATION CONFLICT status. 169eacac00cSChristoph Hellwig */ 170eacac00cSChristoph Hellwig spin_lock(&pr_tmpl->registration_lock); 171eacac00cSChristoph Hellwig conflict = (list_empty(&pr_tmpl->registration_list)) ? 0 : 1; 172eacac00cSChristoph Hellwig spin_unlock(&pr_tmpl->registration_lock); 173eacac00cSChristoph Hellwig } 174eacac00cSChristoph Hellwig 175eacac00cSChristoph Hellwig if (conflict) { 176eacac00cSChristoph Hellwig pr_err("Received legacy SPC-2 RESERVE/RELEASE" 177eacac00cSChristoph Hellwig " while active SPC-3 registrations exist," 178eacac00cSChristoph Hellwig " returning RESERVATION_CONFLICT\n"); 179087a03b3SNicholas Bellinger return -EBUSY; 180eacac00cSChristoph Hellwig } 181eacac00cSChristoph Hellwig 182087a03b3SNicholas Bellinger return 0; 183eacac00cSChristoph Hellwig } 184eacac00cSChristoph Hellwig 185de103c93SChristoph Hellwig sense_reason_t 186de103c93SChristoph Hellwig target_scsi2_reservation_release(struct se_cmd *cmd) 187c66ac9dbSNicholas Bellinger { 188c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 189c66ac9dbSNicholas Bellinger struct se_session *sess = cmd->se_sess; 190609234e3SWei Yongjun struct se_portal_group *tpg; 191de103c93SChristoph Hellwig int rc; 192c66ac9dbSNicholas Bellinger 193609234e3SWei Yongjun if (!sess || !sess->se_tpg) 194d29a5b6aSChristoph Hellwig goto out; 195087a03b3SNicholas Bellinger rc = target_check_scsi2_reservation_conflict(cmd); 196087a03b3SNicholas Bellinger if (rc == 1) 197d29a5b6aSChristoph Hellwig goto out; 198de103c93SChristoph Hellwig if (rc < 0) 199de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 200c66ac9dbSNicholas Bellinger 201c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 202d29a5b6aSChristoph Hellwig if (!dev->dev_reserved_node_acl || !sess) 203d29a5b6aSChristoph Hellwig goto out_unlock; 204c66ac9dbSNicholas Bellinger 205d29a5b6aSChristoph Hellwig if (dev->dev_reserved_node_acl != sess->se_node_acl) 206d29a5b6aSChristoph Hellwig goto out_unlock; 207d29a5b6aSChristoph Hellwig 208edc318d9SBernhard Kohl if (dev->dev_res_bin_isid != sess->sess_bin_isid) 209edc318d9SBernhard Kohl goto out_unlock; 210edc318d9SBernhard Kohl 211c66ac9dbSNicholas Bellinger dev->dev_reserved_node_acl = NULL; 2120fd97ccfSChristoph Hellwig dev->dev_reservation_flags &= ~DRF_SPC2_RESERVATIONS; 2130fd97ccfSChristoph Hellwig if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS_WITH_ISID) { 214c66ac9dbSNicholas Bellinger dev->dev_res_bin_isid = 0; 2150fd97ccfSChristoph Hellwig dev->dev_reservation_flags &= ~DRF_SPC2_RESERVATIONS_WITH_ISID; 216c66ac9dbSNicholas Bellinger } 217609234e3SWei Yongjun tpg = sess->se_tpg; 2186708bb27SAndy Grover pr_debug("SCSI-2 Released reservation for %s LUN: %u ->" 219e3d6f909SAndy Grover " MAPPED LUN: %u for %s\n", tpg->se_tpg_tfo->get_fabric_name(), 220e3d6f909SAndy Grover cmd->se_lun->unpacked_lun, cmd->se_deve->mapped_lun, 221c66ac9dbSNicholas Bellinger sess->se_node_acl->initiatorname); 222c66ac9dbSNicholas Bellinger 223d29a5b6aSChristoph Hellwig out_unlock: 224d29a5b6aSChristoph Hellwig spin_unlock(&dev->dev_reservation_lock); 225d29a5b6aSChristoph Hellwig out: 2266bb35e00SChristoph Hellwig target_complete_cmd(cmd, GOOD); 227de103c93SChristoph Hellwig return 0; 228c66ac9dbSNicholas Bellinger } 229c66ac9dbSNicholas Bellinger 230de103c93SChristoph Hellwig sense_reason_t 231de103c93SChristoph Hellwig target_scsi2_reservation_reserve(struct se_cmd *cmd) 232c66ac9dbSNicholas Bellinger { 233c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 234c66ac9dbSNicholas Bellinger struct se_session *sess = cmd->se_sess; 235609234e3SWei Yongjun struct se_portal_group *tpg; 236de103c93SChristoph Hellwig sense_reason_t ret = 0; 237de103c93SChristoph Hellwig int rc; 238c66ac9dbSNicholas Bellinger 239a1d8b49aSAndy Grover if ((cmd->t_task_cdb[1] & 0x01) && 240a1d8b49aSAndy Grover (cmd->t_task_cdb[1] & 0x02)) { 2416708bb27SAndy Grover pr_err("LongIO and Obselete Bits set, returning" 242c66ac9dbSNicholas Bellinger " ILLEGAL_REQUEST\n"); 243de103c93SChristoph Hellwig return TCM_UNSUPPORTED_SCSI_OPCODE; 244c66ac9dbSNicholas Bellinger } 245c66ac9dbSNicholas Bellinger /* 246c66ac9dbSNicholas Bellinger * This is currently the case for target_core_mod passthrough struct se_cmd 247c66ac9dbSNicholas Bellinger * ops 248c66ac9dbSNicholas Bellinger */ 249609234e3SWei Yongjun if (!sess || !sess->se_tpg) 250d29a5b6aSChristoph Hellwig goto out; 251087a03b3SNicholas Bellinger rc = target_check_scsi2_reservation_conflict(cmd); 252087a03b3SNicholas Bellinger if (rc == 1) 253d29a5b6aSChristoph Hellwig goto out; 254c66ac9dbSNicholas Bellinger 255de103c93SChristoph Hellwig if (rc < 0) 256de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 257de103c93SChristoph Hellwig 258609234e3SWei Yongjun tpg = sess->se_tpg; 259c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 260c66ac9dbSNicholas Bellinger if (dev->dev_reserved_node_acl && 261c66ac9dbSNicholas Bellinger (dev->dev_reserved_node_acl != sess->se_node_acl)) { 2626708bb27SAndy Grover pr_err("SCSI-2 RESERVATION CONFLIFT for %s fabric\n", 263e3d6f909SAndy Grover tpg->se_tpg_tfo->get_fabric_name()); 2646708bb27SAndy Grover pr_err("Original reserver LUN: %u %s\n", 265e3d6f909SAndy Grover cmd->se_lun->unpacked_lun, 266c66ac9dbSNicholas Bellinger dev->dev_reserved_node_acl->initiatorname); 2676708bb27SAndy Grover pr_err("Current attempt - LUN: %u -> MAPPED LUN: %u" 268e3d6f909SAndy Grover " from %s \n", cmd->se_lun->unpacked_lun, 269c66ac9dbSNicholas Bellinger cmd->se_deve->mapped_lun, 270c66ac9dbSNicholas Bellinger sess->se_node_acl->initiatorname); 271de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 272d29a5b6aSChristoph Hellwig goto out_unlock; 273c66ac9dbSNicholas Bellinger } 274c66ac9dbSNicholas Bellinger 275c66ac9dbSNicholas Bellinger dev->dev_reserved_node_acl = sess->se_node_acl; 2760fd97ccfSChristoph Hellwig dev->dev_reservation_flags |= DRF_SPC2_RESERVATIONS; 277c66ac9dbSNicholas Bellinger if (sess->sess_bin_isid != 0) { 278c66ac9dbSNicholas Bellinger dev->dev_res_bin_isid = sess->sess_bin_isid; 2790fd97ccfSChristoph Hellwig dev->dev_reservation_flags |= DRF_SPC2_RESERVATIONS_WITH_ISID; 280c66ac9dbSNicholas Bellinger } 2816708bb27SAndy Grover pr_debug("SCSI-2 Reserved %s LUN: %u -> MAPPED LUN: %u" 282e3d6f909SAndy Grover " for %s\n", tpg->se_tpg_tfo->get_fabric_name(), 283e3d6f909SAndy Grover cmd->se_lun->unpacked_lun, cmd->se_deve->mapped_lun, 284c66ac9dbSNicholas Bellinger sess->se_node_acl->initiatorname); 285c66ac9dbSNicholas Bellinger 286d29a5b6aSChristoph Hellwig out_unlock: 287d29a5b6aSChristoph Hellwig spin_unlock(&dev->dev_reservation_lock); 288d29a5b6aSChristoph Hellwig out: 2896bb35e00SChristoph Hellwig if (!ret) 2906bb35e00SChristoph Hellwig target_complete_cmd(cmd, GOOD); 291d29a5b6aSChristoph Hellwig return ret; 292c66ac9dbSNicholas Bellinger } 293c66ac9dbSNicholas Bellinger 294c66ac9dbSNicholas Bellinger 295c66ac9dbSNicholas Bellinger /* 296c66ac9dbSNicholas Bellinger * Begin SPC-3/SPC-4 Persistent Reservations emulation support 297c66ac9dbSNicholas Bellinger * 298c66ac9dbSNicholas Bellinger * This function is called by those initiator ports who are *NOT* 299c66ac9dbSNicholas Bellinger * the active PR reservation holder when a reservation is present. 300c66ac9dbSNicholas Bellinger */ 301c66ac9dbSNicholas Bellinger static int core_scsi3_pr_seq_non_holder( 302c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 303c66ac9dbSNicholas Bellinger u32 pr_reg_type) 304c66ac9dbSNicholas Bellinger { 305d977f437SChristoph Hellwig unsigned char *cdb = cmd->t_task_cdb; 306c66ac9dbSNicholas Bellinger struct se_dev_entry *se_deve; 307e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 308c66ac9dbSNicholas Bellinger int other_cdb = 0, ignore_reg; 309c66ac9dbSNicholas Bellinger int registered_nexus = 0, ret = 1; /* Conflict by default */ 310c66ac9dbSNicholas Bellinger int all_reg = 0, reg_only = 0; /* ALL_REG, REG_ONLY */ 311c66ac9dbSNicholas Bellinger int we = 0; /* Write Exclusive */ 312c66ac9dbSNicholas Bellinger int legacy = 0; /* Act like a legacy device and return 313c66ac9dbSNicholas Bellinger * RESERVATION CONFLICT on some CDBs */ 314c66ac9dbSNicholas Bellinger 315f2083241SJörn Engel se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; 316c66ac9dbSNicholas Bellinger /* 317c66ac9dbSNicholas Bellinger * Determine if the registration should be ignored due to 318d977f437SChristoph Hellwig * non-matching ISIDs in target_scsi3_pr_reservation_check(). 319c66ac9dbSNicholas Bellinger */ 320c66ac9dbSNicholas Bellinger ignore_reg = (pr_reg_type & 0x80000000); 321c66ac9dbSNicholas Bellinger if (ignore_reg) 322c66ac9dbSNicholas Bellinger pr_reg_type &= ~0x80000000; 323c66ac9dbSNicholas Bellinger 324c66ac9dbSNicholas Bellinger switch (pr_reg_type) { 325c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE: 326c66ac9dbSNicholas Bellinger we = 1; 327c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS: 328c66ac9dbSNicholas Bellinger /* 329c66ac9dbSNicholas Bellinger * Some commands are only allowed for the persistent reservation 330c66ac9dbSNicholas Bellinger * holder. 331c66ac9dbSNicholas Bellinger */ 332c66ac9dbSNicholas Bellinger if ((se_deve->def_pr_registered) && !(ignore_reg)) 333c66ac9dbSNicholas Bellinger registered_nexus = 1; 334c66ac9dbSNicholas Bellinger break; 335c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: 336c66ac9dbSNicholas Bellinger we = 1; 337c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: 338c66ac9dbSNicholas Bellinger /* 339c66ac9dbSNicholas Bellinger * Some commands are only allowed for registered I_T Nexuses. 340c66ac9dbSNicholas Bellinger */ 341c66ac9dbSNicholas Bellinger reg_only = 1; 342c66ac9dbSNicholas Bellinger if ((se_deve->def_pr_registered) && !(ignore_reg)) 343c66ac9dbSNicholas Bellinger registered_nexus = 1; 344c66ac9dbSNicholas Bellinger break; 345c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: 346c66ac9dbSNicholas Bellinger we = 1; 347c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: 348c66ac9dbSNicholas Bellinger /* 349c66ac9dbSNicholas Bellinger * Each registered I_T Nexus is a reservation holder. 350c66ac9dbSNicholas Bellinger */ 351c66ac9dbSNicholas Bellinger all_reg = 1; 352c66ac9dbSNicholas Bellinger if ((se_deve->def_pr_registered) && !(ignore_reg)) 353c66ac9dbSNicholas Bellinger registered_nexus = 1; 354c66ac9dbSNicholas Bellinger break; 355c66ac9dbSNicholas Bellinger default: 356e3d6f909SAndy Grover return -EINVAL; 357c66ac9dbSNicholas Bellinger } 358c66ac9dbSNicholas Bellinger /* 359c66ac9dbSNicholas Bellinger * Referenced from spc4r17 table 45 for *NON* PR holder access 360c66ac9dbSNicholas Bellinger */ 361c66ac9dbSNicholas Bellinger switch (cdb[0]) { 362c66ac9dbSNicholas Bellinger case SECURITY_PROTOCOL_IN: 363c66ac9dbSNicholas Bellinger if (registered_nexus) 364c66ac9dbSNicholas Bellinger return 0; 365c66ac9dbSNicholas Bellinger ret = (we) ? 0 : 1; 366c66ac9dbSNicholas Bellinger break; 367c66ac9dbSNicholas Bellinger case MODE_SENSE: 368c66ac9dbSNicholas Bellinger case MODE_SENSE_10: 369c66ac9dbSNicholas Bellinger case READ_ATTRIBUTE: 370c66ac9dbSNicholas Bellinger case READ_BUFFER: 371c66ac9dbSNicholas Bellinger case RECEIVE_DIAGNOSTIC: 372c66ac9dbSNicholas Bellinger if (legacy) { 373c66ac9dbSNicholas Bellinger ret = 1; 374c66ac9dbSNicholas Bellinger break; 375c66ac9dbSNicholas Bellinger } 376c66ac9dbSNicholas Bellinger if (registered_nexus) { 377c66ac9dbSNicholas Bellinger ret = 0; 378c66ac9dbSNicholas Bellinger break; 379c66ac9dbSNicholas Bellinger } 380c66ac9dbSNicholas Bellinger ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ 381c66ac9dbSNicholas Bellinger break; 382c66ac9dbSNicholas Bellinger case PERSISTENT_RESERVE_OUT: 383c66ac9dbSNicholas Bellinger /* 384c66ac9dbSNicholas Bellinger * This follows PERSISTENT_RESERVE_OUT service actions that 385c66ac9dbSNicholas Bellinger * are allowed in the presence of various reservations. 386c66ac9dbSNicholas Bellinger * See spc4r17, table 46 387c66ac9dbSNicholas Bellinger */ 388c66ac9dbSNicholas Bellinger switch (cdb[1] & 0x1f) { 389c66ac9dbSNicholas Bellinger case PRO_CLEAR: 390c66ac9dbSNicholas Bellinger case PRO_PREEMPT: 391c66ac9dbSNicholas Bellinger case PRO_PREEMPT_AND_ABORT: 392c66ac9dbSNicholas Bellinger ret = (registered_nexus) ? 0 : 1; 393c66ac9dbSNicholas Bellinger break; 394c66ac9dbSNicholas Bellinger case PRO_REGISTER: 395c66ac9dbSNicholas Bellinger case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: 396c66ac9dbSNicholas Bellinger ret = 0; 397c66ac9dbSNicholas Bellinger break; 398c66ac9dbSNicholas Bellinger case PRO_REGISTER_AND_MOVE: 399c66ac9dbSNicholas Bellinger case PRO_RESERVE: 400c66ac9dbSNicholas Bellinger ret = 1; 401c66ac9dbSNicholas Bellinger break; 402c66ac9dbSNicholas Bellinger case PRO_RELEASE: 403c66ac9dbSNicholas Bellinger ret = (registered_nexus) ? 0 : 1; 404c66ac9dbSNicholas Bellinger break; 405c66ac9dbSNicholas Bellinger default: 4066708bb27SAndy Grover pr_err("Unknown PERSISTENT_RESERVE_OUT service" 407c66ac9dbSNicholas Bellinger " action: 0x%02x\n", cdb[1] & 0x1f); 408e3d6f909SAndy Grover return -EINVAL; 409c66ac9dbSNicholas Bellinger } 410c66ac9dbSNicholas Bellinger break; 411c66ac9dbSNicholas Bellinger case RELEASE: 412c66ac9dbSNicholas Bellinger case RELEASE_10: 413eacac00cSChristoph Hellwig /* Handled by CRH=1 in target_scsi2_reservation_release() */ 414c66ac9dbSNicholas Bellinger ret = 0; 415c66ac9dbSNicholas Bellinger break; 416c66ac9dbSNicholas Bellinger case RESERVE: 417c66ac9dbSNicholas Bellinger case RESERVE_10: 418eacac00cSChristoph Hellwig /* Handled by CRH=1 in target_scsi2_reservation_reserve() */ 419c66ac9dbSNicholas Bellinger ret = 0; 420c66ac9dbSNicholas Bellinger break; 421c66ac9dbSNicholas Bellinger case TEST_UNIT_READY: 422c66ac9dbSNicholas Bellinger ret = (legacy) ? 1 : 0; /* Conflict for legacy */ 423c66ac9dbSNicholas Bellinger break; 424c66ac9dbSNicholas Bellinger case MAINTENANCE_IN: 425c66ac9dbSNicholas Bellinger switch (cdb[1] & 0x1f) { 426c66ac9dbSNicholas Bellinger case MI_MANAGEMENT_PROTOCOL_IN: 427c66ac9dbSNicholas Bellinger if (registered_nexus) { 428c66ac9dbSNicholas Bellinger ret = 0; 429c66ac9dbSNicholas Bellinger break; 430c66ac9dbSNicholas Bellinger } 431c66ac9dbSNicholas Bellinger ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ 432c66ac9dbSNicholas Bellinger break; 433c66ac9dbSNicholas Bellinger case MI_REPORT_SUPPORTED_OPERATION_CODES: 434c66ac9dbSNicholas Bellinger case MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS: 435c66ac9dbSNicholas Bellinger if (legacy) { 436c66ac9dbSNicholas Bellinger ret = 1; 437c66ac9dbSNicholas Bellinger break; 438c66ac9dbSNicholas Bellinger } 439c66ac9dbSNicholas Bellinger if (registered_nexus) { 440c66ac9dbSNicholas Bellinger ret = 0; 441c66ac9dbSNicholas Bellinger break; 442c66ac9dbSNicholas Bellinger } 443c66ac9dbSNicholas Bellinger ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ 444c66ac9dbSNicholas Bellinger break; 445c66ac9dbSNicholas Bellinger case MI_REPORT_ALIASES: 446c66ac9dbSNicholas Bellinger case MI_REPORT_IDENTIFYING_INFORMATION: 447c66ac9dbSNicholas Bellinger case MI_REPORT_PRIORITY: 448c66ac9dbSNicholas Bellinger case MI_REPORT_TARGET_PGS: 449c66ac9dbSNicholas Bellinger case MI_REPORT_TIMESTAMP: 450c66ac9dbSNicholas Bellinger ret = 0; /* Allowed */ 451c66ac9dbSNicholas Bellinger break; 452c66ac9dbSNicholas Bellinger default: 4536708bb27SAndy Grover pr_err("Unknown MI Service Action: 0x%02x\n", 454c66ac9dbSNicholas Bellinger (cdb[1] & 0x1f)); 455e3d6f909SAndy Grover return -EINVAL; 456c66ac9dbSNicholas Bellinger } 457c66ac9dbSNicholas Bellinger break; 458c66ac9dbSNicholas Bellinger case ACCESS_CONTROL_IN: 459c66ac9dbSNicholas Bellinger case ACCESS_CONTROL_OUT: 460c66ac9dbSNicholas Bellinger case INQUIRY: 461c66ac9dbSNicholas Bellinger case LOG_SENSE: 462c66ac9dbSNicholas Bellinger case READ_MEDIA_SERIAL_NUMBER: 463c66ac9dbSNicholas Bellinger case REPORT_LUNS: 464c66ac9dbSNicholas Bellinger case REQUEST_SENSE: 4656816966aSMarco Sanvido case PERSISTENT_RESERVE_IN: 466c66ac9dbSNicholas Bellinger ret = 0; /*/ Allowed CDBs */ 467c66ac9dbSNicholas Bellinger break; 468c66ac9dbSNicholas Bellinger default: 469c66ac9dbSNicholas Bellinger other_cdb = 1; 470c66ac9dbSNicholas Bellinger break; 471c66ac9dbSNicholas Bellinger } 472c66ac9dbSNicholas Bellinger /* 47325985edcSLucas De Marchi * Case where the CDB is explicitly allowed in the above switch 474c66ac9dbSNicholas Bellinger * statement. 475c66ac9dbSNicholas Bellinger */ 4766708bb27SAndy Grover if (!ret && !other_cdb) { 477125d0119SHannes Reinecke pr_debug("Allowing explicit CDB: 0x%02x for %s" 478c66ac9dbSNicholas Bellinger " reservation holder\n", cdb[0], 479c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 4808b1e1244SAndy Grover 481c66ac9dbSNicholas Bellinger return ret; 482c66ac9dbSNicholas Bellinger } 483c66ac9dbSNicholas Bellinger /* 484c66ac9dbSNicholas Bellinger * Check if write exclusive initiator ports *NOT* holding the 485c66ac9dbSNicholas Bellinger * WRITE_EXCLUSIVE_* reservation. 486c66ac9dbSNicholas Bellinger */ 487ee1b1b9cSAndy Grover if (we && !registered_nexus) { 488c66ac9dbSNicholas Bellinger if (cmd->data_direction == DMA_TO_DEVICE) { 489c66ac9dbSNicholas Bellinger /* 490c66ac9dbSNicholas Bellinger * Conflict for write exclusive 491c66ac9dbSNicholas Bellinger */ 4926708bb27SAndy Grover pr_debug("%s Conflict for unregistered nexus" 493c66ac9dbSNicholas Bellinger " %s CDB: 0x%02x to %s reservation\n", 494c66ac9dbSNicholas Bellinger transport_dump_cmd_direction(cmd), 495c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, cdb[0], 496c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 497c66ac9dbSNicholas Bellinger return 1; 498c66ac9dbSNicholas Bellinger } else { 499c66ac9dbSNicholas Bellinger /* 500c66ac9dbSNicholas Bellinger * Allow non WRITE CDBs for all Write Exclusive 501c66ac9dbSNicholas Bellinger * PR TYPEs to pass for registered and 502c66ac9dbSNicholas Bellinger * non-registered_nexuxes NOT holding the reservation. 503c66ac9dbSNicholas Bellinger * 504c66ac9dbSNicholas Bellinger * We only make noise for the unregisterd nexuses, 505c66ac9dbSNicholas Bellinger * as we expect registered non-reservation holding 506c66ac9dbSNicholas Bellinger * nexuses to issue CDBs. 507c66ac9dbSNicholas Bellinger */ 5088b1e1244SAndy Grover 5096708bb27SAndy Grover if (!registered_nexus) { 510125d0119SHannes Reinecke pr_debug("Allowing implicit CDB: 0x%02x" 511c66ac9dbSNicholas Bellinger " for %s reservation on unregistered" 512c66ac9dbSNicholas Bellinger " nexus\n", cdb[0], 513c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 514c66ac9dbSNicholas Bellinger } 5158b1e1244SAndy Grover 516c66ac9dbSNicholas Bellinger return 0; 517c66ac9dbSNicholas Bellinger } 518c66ac9dbSNicholas Bellinger } else if ((reg_only) || (all_reg)) { 519c66ac9dbSNicholas Bellinger if (registered_nexus) { 520c66ac9dbSNicholas Bellinger /* 521c66ac9dbSNicholas Bellinger * For PR_*_REG_ONLY and PR_*_ALL_REG reservations, 522c66ac9dbSNicholas Bellinger * allow commands from registered nexuses. 523c66ac9dbSNicholas Bellinger */ 5248b1e1244SAndy Grover 525125d0119SHannes Reinecke pr_debug("Allowing implicit CDB: 0x%02x for %s" 526c66ac9dbSNicholas Bellinger " reservation\n", cdb[0], 527c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 5288b1e1244SAndy Grover 529c66ac9dbSNicholas Bellinger return 0; 530c66ac9dbSNicholas Bellinger } 531c66ac9dbSNicholas Bellinger } 5326708bb27SAndy Grover pr_debug("%s Conflict for %sregistered nexus %s CDB: 0x%2x" 533c66ac9dbSNicholas Bellinger " for %s reservation\n", transport_dump_cmd_direction(cmd), 534c66ac9dbSNicholas Bellinger (registered_nexus) ? "" : "un", 535c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, cdb[0], 536c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 537c66ac9dbSNicholas Bellinger 538c66ac9dbSNicholas Bellinger return 1; /* Conflict by default */ 539c66ac9dbSNicholas Bellinger } 540c66ac9dbSNicholas Bellinger 541de103c93SChristoph Hellwig static sense_reason_t 542de103c93SChristoph Hellwig target_scsi3_pr_reservation_check(struct se_cmd *cmd) 543d977f437SChristoph Hellwig { 544d977f437SChristoph Hellwig struct se_device *dev = cmd->se_dev; 545d977f437SChristoph Hellwig struct se_session *sess = cmd->se_sess; 546d977f437SChristoph Hellwig u32 pr_reg_type; 547d977f437SChristoph Hellwig 548d977f437SChristoph Hellwig if (!dev->dev_pr_res_holder) 549d977f437SChristoph Hellwig return 0; 550d977f437SChristoph Hellwig 551d977f437SChristoph Hellwig pr_reg_type = dev->dev_pr_res_holder->pr_res_type; 552d977f437SChristoph Hellwig cmd->pr_res_key = dev->dev_pr_res_holder->pr_res_key; 553d977f437SChristoph Hellwig if (dev->dev_pr_res_holder->pr_reg_nacl != sess->se_node_acl) 554d977f437SChristoph Hellwig goto check_nonholder; 555d977f437SChristoph Hellwig 556d977f437SChristoph Hellwig if (dev->dev_pr_res_holder->isid_present_at_reg) { 557d977f437SChristoph Hellwig if (dev->dev_pr_res_holder->pr_reg_bin_isid != 558d977f437SChristoph Hellwig sess->sess_bin_isid) { 559d977f437SChristoph Hellwig pr_reg_type |= 0x80000000; 560d977f437SChristoph Hellwig goto check_nonholder; 561d977f437SChristoph Hellwig } 562d977f437SChristoph Hellwig } 563d977f437SChristoph Hellwig 564d977f437SChristoph Hellwig return 0; 565d977f437SChristoph Hellwig 566d977f437SChristoph Hellwig check_nonholder: 567d977f437SChristoph Hellwig if (core_scsi3_pr_seq_non_holder(cmd, pr_reg_type)) 568de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 569d977f437SChristoph Hellwig return 0; 570d977f437SChristoph Hellwig } 571d977f437SChristoph Hellwig 572c66ac9dbSNicholas Bellinger static u32 core_scsi3_pr_generation(struct se_device *dev) 573c66ac9dbSNicholas Bellinger { 574c66ac9dbSNicholas Bellinger u32 prg; 5750fd97ccfSChristoph Hellwig 576c66ac9dbSNicholas Bellinger /* 577c66ac9dbSNicholas Bellinger * PRGeneration field shall contain the value of a 32-bit wrapping 578c66ac9dbSNicholas Bellinger * counter mainted by the device server. 579c66ac9dbSNicholas Bellinger * 580c66ac9dbSNicholas Bellinger * Note that this is done regardless of Active Persist across 581c66ac9dbSNicholas Bellinger * Target PowerLoss (APTPL) 582c66ac9dbSNicholas Bellinger * 583c66ac9dbSNicholas Bellinger * See spc4r17 section 6.3.12 READ_KEYS service action 584c66ac9dbSNicholas Bellinger */ 585c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 5860fd97ccfSChristoph Hellwig prg = dev->t10_pr.pr_generation++; 587c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 588c66ac9dbSNicholas Bellinger 589c66ac9dbSNicholas Bellinger return prg; 590c66ac9dbSNicholas Bellinger } 591c66ac9dbSNicholas Bellinger 592c66ac9dbSNicholas Bellinger static struct t10_pr_registration *__core_scsi3_do_alloc_registration( 593c66ac9dbSNicholas Bellinger struct se_device *dev, 594c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 595c66ac9dbSNicholas Bellinger struct se_dev_entry *deve, 596c66ac9dbSNicholas Bellinger unsigned char *isid, 597c66ac9dbSNicholas Bellinger u64 sa_res_key, 598c66ac9dbSNicholas Bellinger int all_tg_pt, 599c66ac9dbSNicholas Bellinger int aptpl) 600c66ac9dbSNicholas Bellinger { 601c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 602c66ac9dbSNicholas Bellinger 603c66ac9dbSNicholas Bellinger pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_ATOMIC); 6046708bb27SAndy Grover if (!pr_reg) { 6056708bb27SAndy Grover pr_err("Unable to allocate struct t10_pr_registration\n"); 606c66ac9dbSNicholas Bellinger return NULL; 607c66ac9dbSNicholas Bellinger } 608c66ac9dbSNicholas Bellinger 609c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_list); 610c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list); 611c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list); 612c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list); 613c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list); 614c66ac9dbSNicholas Bellinger atomic_set(&pr_reg->pr_res_holders, 0); 615c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = nacl; 616c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve = deve; 617c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun = deve->mapped_lun; 618c66ac9dbSNicholas Bellinger pr_reg->pr_aptpl_target_lun = deve->se_lun->unpacked_lun; 619c66ac9dbSNicholas Bellinger pr_reg->pr_res_key = sa_res_key; 620c66ac9dbSNicholas Bellinger pr_reg->pr_reg_all_tg_pt = all_tg_pt; 621c66ac9dbSNicholas Bellinger pr_reg->pr_reg_aptpl = aptpl; 622c66ac9dbSNicholas Bellinger pr_reg->pr_reg_tg_pt_lun = deve->se_lun; 623c66ac9dbSNicholas Bellinger /* 624c66ac9dbSNicholas Bellinger * If an ISID value for this SCSI Initiator Port exists, 625c66ac9dbSNicholas Bellinger * save it to the registration now. 626c66ac9dbSNicholas Bellinger */ 627c66ac9dbSNicholas Bellinger if (isid != NULL) { 628c66ac9dbSNicholas Bellinger pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid); 629c66ac9dbSNicholas Bellinger snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid); 630c66ac9dbSNicholas Bellinger pr_reg->isid_present_at_reg = 1; 631c66ac9dbSNicholas Bellinger } 632c66ac9dbSNicholas Bellinger 633c66ac9dbSNicholas Bellinger return pr_reg; 634c66ac9dbSNicholas Bellinger } 635c66ac9dbSNicholas Bellinger 636c66ac9dbSNicholas Bellinger static int core_scsi3_lunacl_depend_item(struct se_dev_entry *); 637c66ac9dbSNicholas Bellinger static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *); 638c66ac9dbSNicholas Bellinger 639c66ac9dbSNicholas Bellinger /* 640c66ac9dbSNicholas Bellinger * Function used for handling PR registrations for ALL_TG_PT=1 and ALL_TG_PT=0 641c66ac9dbSNicholas Bellinger * modes. 642c66ac9dbSNicholas Bellinger */ 643c66ac9dbSNicholas Bellinger static struct t10_pr_registration *__core_scsi3_alloc_registration( 644c66ac9dbSNicholas Bellinger struct se_device *dev, 645c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 646c66ac9dbSNicholas Bellinger struct se_dev_entry *deve, 647c66ac9dbSNicholas Bellinger unsigned char *isid, 648c66ac9dbSNicholas Bellinger u64 sa_res_key, 649c66ac9dbSNicholas Bellinger int all_tg_pt, 650c66ac9dbSNicholas Bellinger int aptpl) 651c66ac9dbSNicholas Bellinger { 652c66ac9dbSNicholas Bellinger struct se_dev_entry *deve_tmp; 653c66ac9dbSNicholas Bellinger struct se_node_acl *nacl_tmp; 654c66ac9dbSNicholas Bellinger struct se_port *port, *port_tmp; 655c66ac9dbSNicholas Bellinger struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; 656c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_atp, *pr_reg_tmp, *pr_reg_tmp_safe; 657c66ac9dbSNicholas Bellinger int ret; 658c66ac9dbSNicholas Bellinger /* 659c66ac9dbSNicholas Bellinger * Create a registration for the I_T Nexus upon which the 660c66ac9dbSNicholas Bellinger * PROUT REGISTER was received. 661c66ac9dbSNicholas Bellinger */ 662c66ac9dbSNicholas Bellinger pr_reg = __core_scsi3_do_alloc_registration(dev, nacl, deve, isid, 663c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl); 6646708bb27SAndy Grover if (!pr_reg) 665c66ac9dbSNicholas Bellinger return NULL; 666c66ac9dbSNicholas Bellinger /* 667c66ac9dbSNicholas Bellinger * Return pointer to pr_reg for ALL_TG_PT=0 668c66ac9dbSNicholas Bellinger */ 6696708bb27SAndy Grover if (!all_tg_pt) 670c66ac9dbSNicholas Bellinger return pr_reg; 671c66ac9dbSNicholas Bellinger /* 672c66ac9dbSNicholas Bellinger * Create list of matching SCSI Initiator Port registrations 673c66ac9dbSNicholas Bellinger * for ALL_TG_PT=1 674c66ac9dbSNicholas Bellinger */ 675c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 676c66ac9dbSNicholas Bellinger list_for_each_entry_safe(port, port_tmp, &dev->dev_sep_list, sep_list) { 67733940d09SJoern Engel atomic_inc_mb(&port->sep_tg_pt_ref_cnt); 678c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 679c66ac9dbSNicholas Bellinger 680c66ac9dbSNicholas Bellinger spin_lock_bh(&port->sep_alua_lock); 681c66ac9dbSNicholas Bellinger list_for_each_entry(deve_tmp, &port->sep_alua_list, 682c66ac9dbSNicholas Bellinger alua_port_list) { 683c66ac9dbSNicholas Bellinger /* 684c66ac9dbSNicholas Bellinger * This pointer will be NULL for demo mode MappedLUNs 685125d0119SHannes Reinecke * that have not been make explicit via a ConfigFS 686c66ac9dbSNicholas Bellinger * MappedLUN group for the SCSI Initiator Node ACL. 687c66ac9dbSNicholas Bellinger */ 6886708bb27SAndy Grover if (!deve_tmp->se_lun_acl) 689c66ac9dbSNicholas Bellinger continue; 690c66ac9dbSNicholas Bellinger 691c66ac9dbSNicholas Bellinger nacl_tmp = deve_tmp->se_lun_acl->se_lun_nacl; 692c66ac9dbSNicholas Bellinger /* 693c66ac9dbSNicholas Bellinger * Skip the matching struct se_node_acl that is allocated 694c66ac9dbSNicholas Bellinger * above.. 695c66ac9dbSNicholas Bellinger */ 696c66ac9dbSNicholas Bellinger if (nacl == nacl_tmp) 697c66ac9dbSNicholas Bellinger continue; 698c66ac9dbSNicholas Bellinger /* 699c66ac9dbSNicholas Bellinger * Only perform PR registrations for target ports on 700c66ac9dbSNicholas Bellinger * the same fabric module as the REGISTER w/ ALL_TG_PT=1 701c66ac9dbSNicholas Bellinger * arrived. 702c66ac9dbSNicholas Bellinger */ 703c66ac9dbSNicholas Bellinger if (tfo != nacl_tmp->se_tpg->se_tpg_tfo) 704c66ac9dbSNicholas Bellinger continue; 705c66ac9dbSNicholas Bellinger /* 706c66ac9dbSNicholas Bellinger * Look for a matching Initiator Node ACL in ASCII format 707c66ac9dbSNicholas Bellinger */ 708c66ac9dbSNicholas Bellinger if (strcmp(nacl->initiatorname, nacl_tmp->initiatorname)) 709c66ac9dbSNicholas Bellinger continue; 710c66ac9dbSNicholas Bellinger 71133940d09SJoern Engel atomic_inc_mb(&deve_tmp->pr_ref_count); 712c66ac9dbSNicholas Bellinger spin_unlock_bh(&port->sep_alua_lock); 713c66ac9dbSNicholas Bellinger /* 714c66ac9dbSNicholas Bellinger * Grab a configfs group dependency that is released 715c66ac9dbSNicholas Bellinger * for the exception path at label out: below, or upon 716c66ac9dbSNicholas Bellinger * completion of adding ALL_TG_PT=1 registrations in 717c66ac9dbSNicholas Bellinger * __core_scsi3_add_registration() 718c66ac9dbSNicholas Bellinger */ 719c66ac9dbSNicholas Bellinger ret = core_scsi3_lunacl_depend_item(deve_tmp); 720c66ac9dbSNicholas Bellinger if (ret < 0) { 7216708bb27SAndy Grover pr_err("core_scsi3_lunacl_depend" 722c66ac9dbSNicholas Bellinger "_item() failed\n"); 72333940d09SJoern Engel atomic_dec_mb(&port->sep_tg_pt_ref_cnt); 72433940d09SJoern Engel atomic_dec_mb(&deve_tmp->pr_ref_count); 725c66ac9dbSNicholas Bellinger goto out; 726c66ac9dbSNicholas Bellinger } 727c66ac9dbSNicholas Bellinger /* 728c66ac9dbSNicholas Bellinger * Located a matching SCSI Initiator Port on a different 729c66ac9dbSNicholas Bellinger * port, allocate the pr_reg_atp and attach it to the 730c66ac9dbSNicholas Bellinger * pr_reg->pr_reg_atp_list that will be processed once 731c66ac9dbSNicholas Bellinger * the original *pr_reg is processed in 732c66ac9dbSNicholas Bellinger * __core_scsi3_add_registration() 733c66ac9dbSNicholas Bellinger */ 734c66ac9dbSNicholas Bellinger pr_reg_atp = __core_scsi3_do_alloc_registration(dev, 735c66ac9dbSNicholas Bellinger nacl_tmp, deve_tmp, NULL, 736c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl); 7376708bb27SAndy Grover if (!pr_reg_atp) { 73833940d09SJoern Engel atomic_dec_mb(&port->sep_tg_pt_ref_cnt); 73933940d09SJoern Engel atomic_dec_mb(&deve_tmp->pr_ref_count); 740c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(deve_tmp); 741c66ac9dbSNicholas Bellinger goto out; 742c66ac9dbSNicholas Bellinger } 743c66ac9dbSNicholas Bellinger 744c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg_atp->pr_reg_atp_mem_list, 745c66ac9dbSNicholas Bellinger &pr_reg->pr_reg_atp_list); 746c66ac9dbSNicholas Bellinger spin_lock_bh(&port->sep_alua_lock); 747c66ac9dbSNicholas Bellinger } 748c66ac9dbSNicholas Bellinger spin_unlock_bh(&port->sep_alua_lock); 749c66ac9dbSNicholas Bellinger 750c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 75133940d09SJoern Engel atomic_dec_mb(&port->sep_tg_pt_ref_cnt); 752c66ac9dbSNicholas Bellinger } 753c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 754c66ac9dbSNicholas Bellinger 755c66ac9dbSNicholas Bellinger return pr_reg; 756c66ac9dbSNicholas Bellinger out: 757c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, 758c66ac9dbSNicholas Bellinger &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) { 759c66ac9dbSNicholas Bellinger list_del(&pr_reg_tmp->pr_reg_atp_mem_list); 760c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); 761c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp); 762c66ac9dbSNicholas Bellinger } 763c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 764c66ac9dbSNicholas Bellinger return NULL; 765c66ac9dbSNicholas Bellinger } 766c66ac9dbSNicholas Bellinger 767c66ac9dbSNicholas Bellinger int core_scsi3_alloc_aptpl_registration( 768e3d6f909SAndy Grover struct t10_reservation *pr_tmpl, 769c66ac9dbSNicholas Bellinger u64 sa_res_key, 770c66ac9dbSNicholas Bellinger unsigned char *i_port, 771c66ac9dbSNicholas Bellinger unsigned char *isid, 772c66ac9dbSNicholas Bellinger u32 mapped_lun, 773c66ac9dbSNicholas Bellinger unsigned char *t_port, 774c66ac9dbSNicholas Bellinger u16 tpgt, 775c66ac9dbSNicholas Bellinger u32 target_lun, 776c66ac9dbSNicholas Bellinger int res_holder, 777c66ac9dbSNicholas Bellinger int all_tg_pt, 778c66ac9dbSNicholas Bellinger u8 type) 779c66ac9dbSNicholas Bellinger { 780c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 781c66ac9dbSNicholas Bellinger 7826708bb27SAndy Grover if (!i_port || !t_port || !sa_res_key) { 7836708bb27SAndy Grover pr_err("Illegal parameters for APTPL registration\n"); 784e3d6f909SAndy Grover return -EINVAL; 785c66ac9dbSNicholas Bellinger } 786c66ac9dbSNicholas Bellinger 787c66ac9dbSNicholas Bellinger pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_KERNEL); 7886708bb27SAndy Grover if (!pr_reg) { 7896708bb27SAndy Grover pr_err("Unable to allocate struct t10_pr_registration\n"); 790e3d6f909SAndy Grover return -ENOMEM; 791c66ac9dbSNicholas Bellinger } 792c66ac9dbSNicholas Bellinger 793c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_list); 794c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list); 795c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list); 796c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list); 797c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list); 798c66ac9dbSNicholas Bellinger atomic_set(&pr_reg->pr_res_holders, 0); 799c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = NULL; 800c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve = NULL; 801c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun = mapped_lun; 802c66ac9dbSNicholas Bellinger pr_reg->pr_aptpl_target_lun = target_lun; 803c66ac9dbSNicholas Bellinger pr_reg->pr_res_key = sa_res_key; 804c66ac9dbSNicholas Bellinger pr_reg->pr_reg_all_tg_pt = all_tg_pt; 805c66ac9dbSNicholas Bellinger pr_reg->pr_reg_aptpl = 1; 806c66ac9dbSNicholas Bellinger pr_reg->pr_reg_tg_pt_lun = NULL; 807c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope = 0; /* Always LUN_SCOPE */ 808c66ac9dbSNicholas Bellinger pr_reg->pr_res_type = type; 809c66ac9dbSNicholas Bellinger /* 810c66ac9dbSNicholas Bellinger * If an ISID value had been saved in APTPL metadata for this 811c66ac9dbSNicholas Bellinger * SCSI Initiator Port, restore it now. 812c66ac9dbSNicholas Bellinger */ 813c66ac9dbSNicholas Bellinger if (isid != NULL) { 814c66ac9dbSNicholas Bellinger pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid); 815c66ac9dbSNicholas Bellinger snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid); 816c66ac9dbSNicholas Bellinger pr_reg->isid_present_at_reg = 1; 817c66ac9dbSNicholas Bellinger } 818c66ac9dbSNicholas Bellinger /* 819c66ac9dbSNicholas Bellinger * Copy the i_port and t_port information from caller. 820c66ac9dbSNicholas Bellinger */ 821c66ac9dbSNicholas Bellinger snprintf(pr_reg->pr_iport, PR_APTPL_MAX_IPORT_LEN, "%s", i_port); 822c66ac9dbSNicholas Bellinger snprintf(pr_reg->pr_tport, PR_APTPL_MAX_TPORT_LEN, "%s", t_port); 823c66ac9dbSNicholas Bellinger pr_reg->pr_reg_tpgt = tpgt; 824c66ac9dbSNicholas Bellinger /* 825c66ac9dbSNicholas Bellinger * Set pr_res_holder from caller, the pr_reg who is the reservation 826c66ac9dbSNicholas Bellinger * holder will get it's pointer set in core_scsi3_aptpl_reserve() once 827c66ac9dbSNicholas Bellinger * the Initiator Node LUN ACL from the fabric module is created for 828c66ac9dbSNicholas Bellinger * this registration. 829c66ac9dbSNicholas Bellinger */ 830c66ac9dbSNicholas Bellinger pr_reg->pr_res_holder = res_holder; 831c66ac9dbSNicholas Bellinger 832c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg->pr_reg_aptpl_list, &pr_tmpl->aptpl_reg_list); 8336708bb27SAndy Grover pr_debug("SPC-3 PR APTPL Successfully added registration%s from" 834c66ac9dbSNicholas Bellinger " metadata\n", (res_holder) ? "+reservation" : ""); 835c66ac9dbSNicholas Bellinger return 0; 836c66ac9dbSNicholas Bellinger } 837c66ac9dbSNicholas Bellinger 838c66ac9dbSNicholas Bellinger static void core_scsi3_aptpl_reserve( 839c66ac9dbSNicholas Bellinger struct se_device *dev, 840c66ac9dbSNicholas Bellinger struct se_portal_group *tpg, 841c66ac9dbSNicholas Bellinger struct se_node_acl *node_acl, 842c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg) 843c66ac9dbSNicholas Bellinger { 844c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 845c66ac9dbSNicholas Bellinger 846c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 847d2843c17SAndy Grover core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 848c66ac9dbSNicholas Bellinger 849c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 850c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = pr_reg; 851c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 852c66ac9dbSNicholas Bellinger 8536708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: APTPL RESERVE created" 854c66ac9dbSNicholas Bellinger " new reservation holder TYPE: %s ALL_TG_PT: %d\n", 855e3d6f909SAndy Grover tpg->se_tpg_tfo->get_fabric_name(), 856c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg->pr_res_type), 857c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); 8586708bb27SAndy Grover pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n", 859e3d6f909SAndy Grover tpg->se_tpg_tfo->get_fabric_name(), node_acl->initiatorname, 860d2843c17SAndy Grover i_buf); 861c66ac9dbSNicholas Bellinger } 862c66ac9dbSNicholas Bellinger 863c66ac9dbSNicholas Bellinger static void __core_scsi3_add_registration(struct se_device *, struct se_node_acl *, 86433ce6a87SAndy Grover struct t10_pr_registration *, enum register_type, int); 865c66ac9dbSNicholas Bellinger 866c66ac9dbSNicholas Bellinger static int __core_scsi3_check_aptpl_registration( 867c66ac9dbSNicholas Bellinger struct se_device *dev, 868c66ac9dbSNicholas Bellinger struct se_portal_group *tpg, 869c66ac9dbSNicholas Bellinger struct se_lun *lun, 870c66ac9dbSNicholas Bellinger u32 target_lun, 871c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 872c66ac9dbSNicholas Bellinger struct se_dev_entry *deve) 873c66ac9dbSNicholas Bellinger { 874c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp; 8750fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 876c66ac9dbSNicholas Bellinger unsigned char i_port[PR_APTPL_MAX_IPORT_LEN]; 877c66ac9dbSNicholas Bellinger unsigned char t_port[PR_APTPL_MAX_TPORT_LEN]; 878c66ac9dbSNicholas Bellinger u16 tpgt; 879c66ac9dbSNicholas Bellinger 880c66ac9dbSNicholas Bellinger memset(i_port, 0, PR_APTPL_MAX_IPORT_LEN); 881c66ac9dbSNicholas Bellinger memset(t_port, 0, PR_APTPL_MAX_TPORT_LEN); 882c66ac9dbSNicholas Bellinger /* 883c66ac9dbSNicholas Bellinger * Copy Initiator Port information from struct se_node_acl 884c66ac9dbSNicholas Bellinger */ 885c66ac9dbSNicholas Bellinger snprintf(i_port, PR_APTPL_MAX_IPORT_LEN, "%s", nacl->initiatorname); 886c66ac9dbSNicholas Bellinger snprintf(t_port, PR_APTPL_MAX_TPORT_LEN, "%s", 887e3d6f909SAndy Grover tpg->se_tpg_tfo->tpg_get_wwn(tpg)); 888e3d6f909SAndy Grover tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); 889c66ac9dbSNicholas Bellinger /* 890c66ac9dbSNicholas Bellinger * Look for the matching registrations+reservation from those 891c66ac9dbSNicholas Bellinger * created from APTPL metadata. Note that multiple registrations 892c66ac9dbSNicholas Bellinger * may exist for fabrics that use ISIDs in their SCSI Initiator Port 893c66ac9dbSNicholas Bellinger * TransportIDs. 894c66ac9dbSNicholas Bellinger */ 895c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->aptpl_reg_lock); 896c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, 897c66ac9dbSNicholas Bellinger pr_reg_aptpl_list) { 8986708bb27SAndy Grover if (!strcmp(pr_reg->pr_iport, i_port) && 899c66ac9dbSNicholas Bellinger (pr_reg->pr_res_mapped_lun == deve->mapped_lun) && 900c66ac9dbSNicholas Bellinger !(strcmp(pr_reg->pr_tport, t_port)) && 901c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_tpgt == tpgt) && 902c66ac9dbSNicholas Bellinger (pr_reg->pr_aptpl_target_lun == target_lun)) { 903c66ac9dbSNicholas Bellinger 904c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = nacl; 905c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve = deve; 906c66ac9dbSNicholas Bellinger pr_reg->pr_reg_tg_pt_lun = lun; 907c66ac9dbSNicholas Bellinger 908c66ac9dbSNicholas Bellinger list_del(&pr_reg->pr_reg_aptpl_list); 909c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->aptpl_reg_lock); 910c66ac9dbSNicholas Bellinger /* 911c66ac9dbSNicholas Bellinger * At this point all of the pointers in *pr_reg will 912c66ac9dbSNicholas Bellinger * be setup, so go ahead and add the registration. 913c66ac9dbSNicholas Bellinger */ 914c66ac9dbSNicholas Bellinger 915c66ac9dbSNicholas Bellinger __core_scsi3_add_registration(dev, nacl, pr_reg, 0, 0); 916c66ac9dbSNicholas Bellinger /* 917c66ac9dbSNicholas Bellinger * If this registration is the reservation holder, 918c66ac9dbSNicholas Bellinger * make that happen now.. 919c66ac9dbSNicholas Bellinger */ 920c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_holder) 921c66ac9dbSNicholas Bellinger core_scsi3_aptpl_reserve(dev, tpg, 922c66ac9dbSNicholas Bellinger nacl, pr_reg); 923c66ac9dbSNicholas Bellinger /* 924c66ac9dbSNicholas Bellinger * Reenable pr_aptpl_active to accept new metadata 925c66ac9dbSNicholas Bellinger * updates once the SCSI device is active again.. 926c66ac9dbSNicholas Bellinger */ 927c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->aptpl_reg_lock); 928c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_active = 1; 929c66ac9dbSNicholas Bellinger } 930c66ac9dbSNicholas Bellinger } 931c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->aptpl_reg_lock); 932c66ac9dbSNicholas Bellinger 933c66ac9dbSNicholas Bellinger return 0; 934c66ac9dbSNicholas Bellinger } 935c66ac9dbSNicholas Bellinger 936c66ac9dbSNicholas Bellinger int core_scsi3_check_aptpl_registration( 937c66ac9dbSNicholas Bellinger struct se_device *dev, 938c66ac9dbSNicholas Bellinger struct se_portal_group *tpg, 939c66ac9dbSNicholas Bellinger struct se_lun *lun, 940e2480563SNicholas Bellinger struct se_node_acl *nacl, 941e2480563SNicholas Bellinger u32 mapped_lun) 942c66ac9dbSNicholas Bellinger { 943e2480563SNicholas Bellinger struct se_dev_entry *deve = nacl->device_list[mapped_lun]; 944c66ac9dbSNicholas Bellinger 945d977f437SChristoph Hellwig if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 946c66ac9dbSNicholas Bellinger return 0; 947c66ac9dbSNicholas Bellinger 948c66ac9dbSNicholas Bellinger return __core_scsi3_check_aptpl_registration(dev, tpg, lun, 949c66ac9dbSNicholas Bellinger lun->unpacked_lun, nacl, deve); 950c66ac9dbSNicholas Bellinger } 951c66ac9dbSNicholas Bellinger 952c66ac9dbSNicholas Bellinger static void __core_scsi3_dump_registration( 953c66ac9dbSNicholas Bellinger struct target_core_fabric_ops *tfo, 954c66ac9dbSNicholas Bellinger struct se_device *dev, 955c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 956c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 95733ce6a87SAndy Grover enum register_type register_type) 958c66ac9dbSNicholas Bellinger { 959c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg = nacl->se_tpg; 960c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 961c66ac9dbSNicholas Bellinger 962c66ac9dbSNicholas Bellinger memset(&i_buf[0], 0, PR_REG_ISID_ID_LEN); 963d2843c17SAndy Grover core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 964c66ac9dbSNicholas Bellinger 9656708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: REGISTER%s Initiator" 96633ce6a87SAndy Grover " Node: %s%s\n", tfo->get_fabric_name(), (register_type == REGISTER_AND_MOVE) ? 96733ce6a87SAndy Grover "_AND_MOVE" : (register_type == REGISTER_AND_IGNORE_EXISTING_KEY) ? 968c66ac9dbSNicholas Bellinger "_AND_IGNORE_EXISTING_KEY" : "", nacl->initiatorname, 969d2843c17SAndy Grover i_buf); 9706708bb27SAndy Grover pr_debug("SPC-3 PR [%s] registration on Target Port: %s,0x%04x\n", 971c66ac9dbSNicholas Bellinger tfo->get_fabric_name(), tfo->tpg_get_wwn(se_tpg), 972c66ac9dbSNicholas Bellinger tfo->tpg_get_tag(se_tpg)); 9736708bb27SAndy Grover pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target" 974c66ac9dbSNicholas Bellinger " Port(s)\n", tfo->get_fabric_name(), 975c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE", 976e3d6f909SAndy Grover dev->transport->name); 9776708bb27SAndy Grover pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:" 978c66ac9dbSNicholas Bellinger " 0x%08x APTPL: %d\n", tfo->get_fabric_name(), 979c66ac9dbSNicholas Bellinger pr_reg->pr_res_key, pr_reg->pr_res_generation, 980c66ac9dbSNicholas Bellinger pr_reg->pr_reg_aptpl); 981c66ac9dbSNicholas Bellinger } 982c66ac9dbSNicholas Bellinger 983c66ac9dbSNicholas Bellinger /* 984c66ac9dbSNicholas Bellinger * this function can be called with struct se_device->dev_reservation_lock 985c66ac9dbSNicholas Bellinger * when register_move = 1 986c66ac9dbSNicholas Bellinger */ 987c66ac9dbSNicholas Bellinger static void __core_scsi3_add_registration( 988c66ac9dbSNicholas Bellinger struct se_device *dev, 989c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 990c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 99133ce6a87SAndy Grover enum register_type register_type, 992c66ac9dbSNicholas Bellinger int register_move) 993c66ac9dbSNicholas Bellinger { 994c66ac9dbSNicholas Bellinger struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; 995c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe; 9960fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 997c66ac9dbSNicholas Bellinger 998c66ac9dbSNicholas Bellinger /* 999c66ac9dbSNicholas Bellinger * Increment PRgeneration counter for struct se_device upon a successful 1000c66ac9dbSNicholas Bellinger * REGISTER, see spc4r17 section 6.3.2 READ_KEYS service action 1001c66ac9dbSNicholas Bellinger * 1002c66ac9dbSNicholas Bellinger * Also, when register_move = 1 for PROUT REGISTER_AND_MOVE service 1003c66ac9dbSNicholas Bellinger * action, the struct se_device->dev_reservation_lock will already be held, 1004c66ac9dbSNicholas Bellinger * so we do not call core_scsi3_pr_generation() which grabs the lock 1005c66ac9dbSNicholas Bellinger * for the REGISTER. 1006c66ac9dbSNicholas Bellinger */ 1007c66ac9dbSNicholas Bellinger pr_reg->pr_res_generation = (register_move) ? 10080fd97ccfSChristoph Hellwig dev->t10_pr.pr_generation++ : 1009c66ac9dbSNicholas Bellinger core_scsi3_pr_generation(dev); 1010c66ac9dbSNicholas Bellinger 1011c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1012c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg->pr_reg_list, &pr_tmpl->registration_list); 1013c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve->def_pr_registered = 1; 1014c66ac9dbSNicholas Bellinger 1015c66ac9dbSNicholas Bellinger __core_scsi3_dump_registration(tfo, dev, nacl, pr_reg, register_type); 1016c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1017c66ac9dbSNicholas Bellinger /* 1018c66ac9dbSNicholas Bellinger * Skip extra processing for ALL_TG_PT=0 or REGISTER_AND_MOVE. 1019c66ac9dbSNicholas Bellinger */ 10206708bb27SAndy Grover if (!pr_reg->pr_reg_all_tg_pt || register_move) 1021c66ac9dbSNicholas Bellinger return; 1022c66ac9dbSNicholas Bellinger /* 1023c66ac9dbSNicholas Bellinger * Walk pr_reg->pr_reg_atp_list and add registrations for ALL_TG_PT=1 1024c66ac9dbSNicholas Bellinger * allocated in __core_scsi3_alloc_registration() 1025c66ac9dbSNicholas Bellinger */ 1026c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, 1027c66ac9dbSNicholas Bellinger &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) { 1028c66ac9dbSNicholas Bellinger list_del(&pr_reg_tmp->pr_reg_atp_mem_list); 1029c66ac9dbSNicholas Bellinger 1030c66ac9dbSNicholas Bellinger pr_reg_tmp->pr_res_generation = core_scsi3_pr_generation(dev); 1031c66ac9dbSNicholas Bellinger 1032c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1033c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg_tmp->pr_reg_list, 1034c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list); 1035c66ac9dbSNicholas Bellinger pr_reg_tmp->pr_reg_deve->def_pr_registered = 1; 1036c66ac9dbSNicholas Bellinger 1037c66ac9dbSNicholas Bellinger __core_scsi3_dump_registration(tfo, dev, 1038c66ac9dbSNicholas Bellinger pr_reg_tmp->pr_reg_nacl, pr_reg_tmp, 1039c66ac9dbSNicholas Bellinger register_type); 1040c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1041c66ac9dbSNicholas Bellinger /* 1042c66ac9dbSNicholas Bellinger * Drop configfs group dependency reference from 1043c66ac9dbSNicholas Bellinger * __core_scsi3_alloc_registration() 1044c66ac9dbSNicholas Bellinger */ 1045c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); 1046c66ac9dbSNicholas Bellinger } 1047c66ac9dbSNicholas Bellinger } 1048c66ac9dbSNicholas Bellinger 1049c66ac9dbSNicholas Bellinger static int core_scsi3_alloc_registration( 1050c66ac9dbSNicholas Bellinger struct se_device *dev, 1051c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 1052c66ac9dbSNicholas Bellinger struct se_dev_entry *deve, 1053c66ac9dbSNicholas Bellinger unsigned char *isid, 1054c66ac9dbSNicholas Bellinger u64 sa_res_key, 1055c66ac9dbSNicholas Bellinger int all_tg_pt, 1056c66ac9dbSNicholas Bellinger int aptpl, 105733ce6a87SAndy Grover enum register_type register_type, 1058c66ac9dbSNicholas Bellinger int register_move) 1059c66ac9dbSNicholas Bellinger { 1060c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 1061c66ac9dbSNicholas Bellinger 1062c66ac9dbSNicholas Bellinger pr_reg = __core_scsi3_alloc_registration(dev, nacl, deve, isid, 1063c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl); 10646708bb27SAndy Grover if (!pr_reg) 1065e3d6f909SAndy Grover return -EPERM; 1066c66ac9dbSNicholas Bellinger 1067c66ac9dbSNicholas Bellinger __core_scsi3_add_registration(dev, nacl, pr_reg, 1068c66ac9dbSNicholas Bellinger register_type, register_move); 1069c66ac9dbSNicholas Bellinger return 0; 1070c66ac9dbSNicholas Bellinger } 1071c66ac9dbSNicholas Bellinger 1072c66ac9dbSNicholas Bellinger static struct t10_pr_registration *__core_scsi3_locate_pr_reg( 1073c66ac9dbSNicholas Bellinger struct se_device *dev, 1074c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 1075c66ac9dbSNicholas Bellinger unsigned char *isid) 1076c66ac9dbSNicholas Bellinger { 10770fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 1078c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp; 1079c66ac9dbSNicholas Bellinger struct se_portal_group *tpg; 1080c66ac9dbSNicholas Bellinger 1081c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1082c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 1083c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 1084c66ac9dbSNicholas Bellinger /* 1085c66ac9dbSNicholas Bellinger * First look for a matching struct se_node_acl 1086c66ac9dbSNicholas Bellinger */ 1087c66ac9dbSNicholas Bellinger if (pr_reg->pr_reg_nacl != nacl) 1088c66ac9dbSNicholas Bellinger continue; 1089c66ac9dbSNicholas Bellinger 1090c66ac9dbSNicholas Bellinger tpg = pr_reg->pr_reg_nacl->se_tpg; 1091c66ac9dbSNicholas Bellinger /* 1092c66ac9dbSNicholas Bellinger * If this registration does NOT contain a fabric provided 1093c66ac9dbSNicholas Bellinger * ISID, then we have found a match. 1094c66ac9dbSNicholas Bellinger */ 10956708bb27SAndy Grover if (!pr_reg->isid_present_at_reg) { 1096c66ac9dbSNicholas Bellinger /* 1097c66ac9dbSNicholas Bellinger * Determine if this SCSI device server requires that 1098c66ac9dbSNicholas Bellinger * SCSI Intiatior TransportID w/ ISIDs is enforced 1099c66ac9dbSNicholas Bellinger * for fabric modules (iSCSI) requiring them. 1100c66ac9dbSNicholas Bellinger */ 1101e3d6f909SAndy Grover if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { 11020fd97ccfSChristoph Hellwig if (dev->dev_attrib.enforce_pr_isids) 1103c66ac9dbSNicholas Bellinger continue; 1104c66ac9dbSNicholas Bellinger } 110533940d09SJoern Engel atomic_inc_mb(&pr_reg->pr_res_holders); 1106c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1107c66ac9dbSNicholas Bellinger return pr_reg; 1108c66ac9dbSNicholas Bellinger } 1109c66ac9dbSNicholas Bellinger /* 1110c66ac9dbSNicholas Bellinger * If the *pr_reg contains a fabric defined ISID for multi-value 1111c66ac9dbSNicholas Bellinger * SCSI Initiator Port TransportIDs, then we expect a valid 1112c66ac9dbSNicholas Bellinger * matching ISID to be provided by the local SCSI Initiator Port. 1113c66ac9dbSNicholas Bellinger */ 11146708bb27SAndy Grover if (!isid) 1115c66ac9dbSNicholas Bellinger continue; 1116c66ac9dbSNicholas Bellinger if (strcmp(isid, pr_reg->pr_reg_isid)) 1117c66ac9dbSNicholas Bellinger continue; 1118c66ac9dbSNicholas Bellinger 111933940d09SJoern Engel atomic_inc_mb(&pr_reg->pr_res_holders); 1120c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1121c66ac9dbSNicholas Bellinger return pr_reg; 1122c66ac9dbSNicholas Bellinger } 1123c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1124c66ac9dbSNicholas Bellinger 1125c66ac9dbSNicholas Bellinger return NULL; 1126c66ac9dbSNicholas Bellinger } 1127c66ac9dbSNicholas Bellinger 1128c66ac9dbSNicholas Bellinger static struct t10_pr_registration *core_scsi3_locate_pr_reg( 1129c66ac9dbSNicholas Bellinger struct se_device *dev, 1130c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 1131c66ac9dbSNicholas Bellinger struct se_session *sess) 1132c66ac9dbSNicholas Bellinger { 1133c66ac9dbSNicholas Bellinger struct se_portal_group *tpg = nacl->se_tpg; 1134c66ac9dbSNicholas Bellinger unsigned char buf[PR_REG_ISID_LEN], *isid_ptr = NULL; 1135c66ac9dbSNicholas Bellinger 1136e3d6f909SAndy Grover if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { 1137c66ac9dbSNicholas Bellinger memset(&buf[0], 0, PR_REG_ISID_LEN); 1138e3d6f909SAndy Grover tpg->se_tpg_tfo->sess_get_initiator_sid(sess, &buf[0], 1139c66ac9dbSNicholas Bellinger PR_REG_ISID_LEN); 1140c66ac9dbSNicholas Bellinger isid_ptr = &buf[0]; 1141c66ac9dbSNicholas Bellinger } 1142c66ac9dbSNicholas Bellinger 1143c66ac9dbSNicholas Bellinger return __core_scsi3_locate_pr_reg(dev, nacl, isid_ptr); 1144c66ac9dbSNicholas Bellinger } 1145c66ac9dbSNicholas Bellinger 1146c66ac9dbSNicholas Bellinger static void core_scsi3_put_pr_reg(struct t10_pr_registration *pr_reg) 1147c66ac9dbSNicholas Bellinger { 114833940d09SJoern Engel atomic_dec_mb(&pr_reg->pr_res_holders); 1149c66ac9dbSNicholas Bellinger } 1150c66ac9dbSNicholas Bellinger 1151125d0119SHannes Reinecke static int core_scsi3_check_implicit_release( 1152c66ac9dbSNicholas Bellinger struct se_device *dev, 1153c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg) 1154c66ac9dbSNicholas Bellinger { 1155c66ac9dbSNicholas Bellinger struct se_node_acl *nacl = pr_reg->pr_reg_nacl; 1156c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_res_holder; 1157c66ac9dbSNicholas Bellinger int ret = 0; 1158c66ac9dbSNicholas Bellinger 1159c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 1160c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 11616708bb27SAndy Grover if (!pr_res_holder) { 1162c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1163c66ac9dbSNicholas Bellinger return ret; 1164c66ac9dbSNicholas Bellinger } 1165c66ac9dbSNicholas Bellinger if (pr_res_holder == pr_reg) { 1166c66ac9dbSNicholas Bellinger /* 1167125d0119SHannes Reinecke * Perform an implicit RELEASE if the registration that 1168c66ac9dbSNicholas Bellinger * is being released is holding the reservation. 1169c66ac9dbSNicholas Bellinger * 1170c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.11.1: 1171c66ac9dbSNicholas Bellinger * 1172c66ac9dbSNicholas Bellinger * e) If the I_T nexus is the persistent reservation holder 1173c66ac9dbSNicholas Bellinger * and the persistent reservation is not an all registrants 1174c66ac9dbSNicholas Bellinger * type, then a PERSISTENT RESERVE OUT command with REGISTER 1175c66ac9dbSNicholas Bellinger * service action or REGISTER AND IGNORE EXISTING KEY 1176c66ac9dbSNicholas Bellinger * service action with the SERVICE ACTION RESERVATION KEY 1177c66ac9dbSNicholas Bellinger * field set to zero (see 5.7.11.3). 1178c66ac9dbSNicholas Bellinger */ 1179c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, nacl, pr_reg, 0); 1180c66ac9dbSNicholas Bellinger ret = 1; 1181c66ac9dbSNicholas Bellinger /* 1182c66ac9dbSNicholas Bellinger * For 'All Registrants' reservation types, all existing 1183c66ac9dbSNicholas Bellinger * registrations are still processed as reservation holders 1184c66ac9dbSNicholas Bellinger * in core_scsi3_pr_seq_non_holder() after the initial 1185125d0119SHannes Reinecke * reservation holder is implicitly released here. 1186c66ac9dbSNicholas Bellinger */ 1187c66ac9dbSNicholas Bellinger } else if (pr_reg->pr_reg_all_tg_pt && 1188c66ac9dbSNicholas Bellinger (!strcmp(pr_res_holder->pr_reg_nacl->initiatorname, 1189c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->initiatorname)) && 1190c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_key == pr_reg->pr_res_key)) { 11916708bb27SAndy Grover pr_err("SPC-3 PR: Unable to perform ALL_TG_PT=1" 1192c66ac9dbSNicholas Bellinger " UNREGISTER while existing reservation with matching" 1193c66ac9dbSNicholas Bellinger " key 0x%016Lx is present from another SCSI Initiator" 1194c66ac9dbSNicholas Bellinger " Port\n", pr_reg->pr_res_key); 1195e3d6f909SAndy Grover ret = -EPERM; 1196c66ac9dbSNicholas Bellinger } 1197c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1198c66ac9dbSNicholas Bellinger 1199c66ac9dbSNicholas Bellinger return ret; 1200c66ac9dbSNicholas Bellinger } 1201c66ac9dbSNicholas Bellinger 1202c66ac9dbSNicholas Bellinger /* 1203e3d6f909SAndy Grover * Called with struct t10_reservation->registration_lock held. 1204c66ac9dbSNicholas Bellinger */ 1205c66ac9dbSNicholas Bellinger static void __core_scsi3_free_registration( 1206c66ac9dbSNicholas Bellinger struct se_device *dev, 1207c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 1208c66ac9dbSNicholas Bellinger struct list_head *preempt_and_abort_list, 1209c66ac9dbSNicholas Bellinger int dec_holders) 1210c66ac9dbSNicholas Bellinger { 1211c66ac9dbSNicholas Bellinger struct target_core_fabric_ops *tfo = 1212c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 12130fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 1214c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 1215c66ac9dbSNicholas Bellinger 1216c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1217d2843c17SAndy Grover core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1218c66ac9dbSNicholas Bellinger 1219c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve->def_pr_registered = 0; 1220c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve->pr_res_key = 0; 1221c66ac9dbSNicholas Bellinger list_del(&pr_reg->pr_reg_list); 1222c66ac9dbSNicholas Bellinger /* 1223c66ac9dbSNicholas Bellinger * Caller accessing *pr_reg using core_scsi3_locate_pr_reg(), 1224c66ac9dbSNicholas Bellinger * so call core_scsi3_put_pr_reg() to decrement our reference. 1225c66ac9dbSNicholas Bellinger */ 1226c66ac9dbSNicholas Bellinger if (dec_holders) 1227c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 1228c66ac9dbSNicholas Bellinger /* 1229c66ac9dbSNicholas Bellinger * Wait until all reference from any other I_T nexuses for this 1230c66ac9dbSNicholas Bellinger * *pr_reg have been released. Because list_del() is called above, 1231c66ac9dbSNicholas Bellinger * the last core_scsi3_put_pr_reg(pr_reg) will release this reference 1232c66ac9dbSNicholas Bellinger * count back to zero, and we release *pr_reg. 1233c66ac9dbSNicholas Bellinger */ 1234c66ac9dbSNicholas Bellinger while (atomic_read(&pr_reg->pr_res_holders) != 0) { 1235c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 12366708bb27SAndy Grover pr_debug("SPC-3 PR [%s] waiting for pr_res_holders\n", 1237c66ac9dbSNicholas Bellinger tfo->get_fabric_name()); 1238c66ac9dbSNicholas Bellinger cpu_relax(); 1239c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1240c66ac9dbSNicholas Bellinger } 1241c66ac9dbSNicholas Bellinger 12426708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: UNREGISTER Initiator" 1243c66ac9dbSNicholas Bellinger " Node: %s%s\n", tfo->get_fabric_name(), 1244c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->initiatorname, 1245d2843c17SAndy Grover i_buf); 12466708bb27SAndy Grover pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target" 1247c66ac9dbSNicholas Bellinger " Port(s)\n", tfo->get_fabric_name(), 1248c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE", 1249e3d6f909SAndy Grover dev->transport->name); 12506708bb27SAndy Grover pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:" 1251c66ac9dbSNicholas Bellinger " 0x%08x\n", tfo->get_fabric_name(), pr_reg->pr_res_key, 1252c66ac9dbSNicholas Bellinger pr_reg->pr_res_generation); 1253c66ac9dbSNicholas Bellinger 12546708bb27SAndy Grover if (!preempt_and_abort_list) { 1255c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve = NULL; 1256c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = NULL; 1257c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 1258c66ac9dbSNicholas Bellinger return; 1259c66ac9dbSNicholas Bellinger } 1260c66ac9dbSNicholas Bellinger /* 1261c66ac9dbSNicholas Bellinger * For PREEMPT_AND_ABORT, the list of *pr_reg in preempt_and_abort_list 1262c66ac9dbSNicholas Bellinger * are released once the ABORT_TASK_SET has completed.. 1263c66ac9dbSNicholas Bellinger */ 1264c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg->pr_reg_abort_list, preempt_and_abort_list); 1265c66ac9dbSNicholas Bellinger } 1266c66ac9dbSNicholas Bellinger 1267c66ac9dbSNicholas Bellinger void core_scsi3_free_pr_reg_from_nacl( 1268c66ac9dbSNicholas Bellinger struct se_device *dev, 1269c66ac9dbSNicholas Bellinger struct se_node_acl *nacl) 1270c66ac9dbSNicholas Bellinger { 12710fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 1272c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder; 1273c66ac9dbSNicholas Bellinger /* 1274c66ac9dbSNicholas Bellinger * If the passed se_node_acl matches the reservation holder, 1275c66ac9dbSNicholas Bellinger * release the reservation. 1276c66ac9dbSNicholas Bellinger */ 1277c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 1278c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 1279c66ac9dbSNicholas Bellinger if ((pr_res_holder != NULL) && 1280c66ac9dbSNicholas Bellinger (pr_res_holder->pr_reg_nacl == nacl)) 1281c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, nacl, pr_res_holder, 0); 1282c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1283c66ac9dbSNicholas Bellinger /* 1284c66ac9dbSNicholas Bellinger * Release any registration associated with the struct se_node_acl. 1285c66ac9dbSNicholas Bellinger */ 1286c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1287c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 1288c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 1289c66ac9dbSNicholas Bellinger 1290c66ac9dbSNicholas Bellinger if (pr_reg->pr_reg_nacl != nacl) 1291c66ac9dbSNicholas Bellinger continue; 1292c66ac9dbSNicholas Bellinger 1293c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, NULL, 0); 1294c66ac9dbSNicholas Bellinger } 1295c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1296c66ac9dbSNicholas Bellinger } 1297c66ac9dbSNicholas Bellinger 1298c66ac9dbSNicholas Bellinger void core_scsi3_free_all_registrations( 1299c66ac9dbSNicholas Bellinger struct se_device *dev) 1300c66ac9dbSNicholas Bellinger { 13010fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 1302c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder; 1303c66ac9dbSNicholas Bellinger 1304c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 1305c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 1306c66ac9dbSNicholas Bellinger if (pr_res_holder != NULL) { 1307c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 1308c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, pr_res_nacl, 1309c66ac9dbSNicholas Bellinger pr_res_holder, 0); 1310c66ac9dbSNicholas Bellinger } 1311c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1312c66ac9dbSNicholas Bellinger 1313c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1314c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 1315c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 1316c66ac9dbSNicholas Bellinger 1317c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, NULL, 0); 1318c66ac9dbSNicholas Bellinger } 1319c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1320c66ac9dbSNicholas Bellinger 1321c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->aptpl_reg_lock); 1322c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, 1323c66ac9dbSNicholas Bellinger pr_reg_aptpl_list) { 1324c66ac9dbSNicholas Bellinger list_del(&pr_reg->pr_reg_aptpl_list); 1325c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 1326c66ac9dbSNicholas Bellinger } 1327c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->aptpl_reg_lock); 1328c66ac9dbSNicholas Bellinger } 1329c66ac9dbSNicholas Bellinger 1330c66ac9dbSNicholas Bellinger static int core_scsi3_tpg_depend_item(struct se_portal_group *tpg) 1331c66ac9dbSNicholas Bellinger { 1332e3d6f909SAndy Grover return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys, 1333c66ac9dbSNicholas Bellinger &tpg->tpg_group.cg_item); 1334c66ac9dbSNicholas Bellinger } 1335c66ac9dbSNicholas Bellinger 1336c66ac9dbSNicholas Bellinger static void core_scsi3_tpg_undepend_item(struct se_portal_group *tpg) 1337c66ac9dbSNicholas Bellinger { 1338e3d6f909SAndy Grover configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys, 1339c66ac9dbSNicholas Bellinger &tpg->tpg_group.cg_item); 1340c66ac9dbSNicholas Bellinger 134133940d09SJoern Engel atomic_dec_mb(&tpg->tpg_pr_ref_count); 1342c66ac9dbSNicholas Bellinger } 1343c66ac9dbSNicholas Bellinger 1344c66ac9dbSNicholas Bellinger static int core_scsi3_nodeacl_depend_item(struct se_node_acl *nacl) 1345c66ac9dbSNicholas Bellinger { 1346c66ac9dbSNicholas Bellinger struct se_portal_group *tpg = nacl->se_tpg; 1347c66ac9dbSNicholas Bellinger 1348c66ac9dbSNicholas Bellinger if (nacl->dynamic_node_acl) 1349c66ac9dbSNicholas Bellinger return 0; 1350c66ac9dbSNicholas Bellinger 1351e3d6f909SAndy Grover return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys, 1352c66ac9dbSNicholas Bellinger &nacl->acl_group.cg_item); 1353c66ac9dbSNicholas Bellinger } 1354c66ac9dbSNicholas Bellinger 1355c66ac9dbSNicholas Bellinger static void core_scsi3_nodeacl_undepend_item(struct se_node_acl *nacl) 1356c66ac9dbSNicholas Bellinger { 1357c66ac9dbSNicholas Bellinger struct se_portal_group *tpg = nacl->se_tpg; 1358c66ac9dbSNicholas Bellinger 1359c66ac9dbSNicholas Bellinger if (nacl->dynamic_node_acl) { 136033940d09SJoern Engel atomic_dec_mb(&nacl->acl_pr_ref_count); 1361c66ac9dbSNicholas Bellinger return; 1362c66ac9dbSNicholas Bellinger } 1363c66ac9dbSNicholas Bellinger 1364e3d6f909SAndy Grover configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys, 1365c66ac9dbSNicholas Bellinger &nacl->acl_group.cg_item); 1366c66ac9dbSNicholas Bellinger 136733940d09SJoern Engel atomic_dec_mb(&nacl->acl_pr_ref_count); 1368c66ac9dbSNicholas Bellinger } 1369c66ac9dbSNicholas Bellinger 1370c66ac9dbSNicholas Bellinger static int core_scsi3_lunacl_depend_item(struct se_dev_entry *se_deve) 1371c66ac9dbSNicholas Bellinger { 1372c66ac9dbSNicholas Bellinger struct se_lun_acl *lun_acl = se_deve->se_lun_acl; 1373c66ac9dbSNicholas Bellinger struct se_node_acl *nacl; 1374c66ac9dbSNicholas Bellinger struct se_portal_group *tpg; 1375c66ac9dbSNicholas Bellinger /* 1376c66ac9dbSNicholas Bellinger * For nacl->dynamic_node_acl=1 1377c66ac9dbSNicholas Bellinger */ 13786708bb27SAndy Grover if (!lun_acl) 1379c66ac9dbSNicholas Bellinger return 0; 1380c66ac9dbSNicholas Bellinger 1381c66ac9dbSNicholas Bellinger nacl = lun_acl->se_lun_nacl; 1382c66ac9dbSNicholas Bellinger tpg = nacl->se_tpg; 1383c66ac9dbSNicholas Bellinger 1384e3d6f909SAndy Grover return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys, 1385c66ac9dbSNicholas Bellinger &lun_acl->se_lun_group.cg_item); 1386c66ac9dbSNicholas Bellinger } 1387c66ac9dbSNicholas Bellinger 1388c66ac9dbSNicholas Bellinger static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *se_deve) 1389c66ac9dbSNicholas Bellinger { 1390c66ac9dbSNicholas Bellinger struct se_lun_acl *lun_acl = se_deve->se_lun_acl; 1391c66ac9dbSNicholas Bellinger struct se_node_acl *nacl; 1392c66ac9dbSNicholas Bellinger struct se_portal_group *tpg; 1393c66ac9dbSNicholas Bellinger /* 1394c66ac9dbSNicholas Bellinger * For nacl->dynamic_node_acl=1 1395c66ac9dbSNicholas Bellinger */ 13966708bb27SAndy Grover if (!lun_acl) { 139733940d09SJoern Engel atomic_dec_mb(&se_deve->pr_ref_count); 1398c66ac9dbSNicholas Bellinger return; 1399c66ac9dbSNicholas Bellinger } 1400c66ac9dbSNicholas Bellinger nacl = lun_acl->se_lun_nacl; 1401c66ac9dbSNicholas Bellinger tpg = nacl->se_tpg; 1402c66ac9dbSNicholas Bellinger 1403e3d6f909SAndy Grover configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys, 1404c66ac9dbSNicholas Bellinger &lun_acl->se_lun_group.cg_item); 1405c66ac9dbSNicholas Bellinger 140633940d09SJoern Engel atomic_dec_mb(&se_deve->pr_ref_count); 1407c66ac9dbSNicholas Bellinger } 1408c66ac9dbSNicholas Bellinger 1409de103c93SChristoph Hellwig static sense_reason_t 1410de103c93SChristoph Hellwig core_scsi3_decode_spec_i_port( 1411c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 1412c66ac9dbSNicholas Bellinger struct se_portal_group *tpg, 1413c66ac9dbSNicholas Bellinger unsigned char *l_isid, 1414c66ac9dbSNicholas Bellinger u64 sa_res_key, 1415c66ac9dbSNicholas Bellinger int all_tg_pt, 1416c66ac9dbSNicholas Bellinger int aptpl) 1417c66ac9dbSNicholas Bellinger { 14185951146dSAndy Grover struct se_device *dev = cmd->se_dev; 1419c66ac9dbSNicholas Bellinger struct se_port *tmp_port; 1420c66ac9dbSNicholas Bellinger struct se_portal_group *dest_tpg = NULL, *tmp_tpg; 1421e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 1422c66ac9dbSNicholas Bellinger struct se_node_acl *dest_node_acl = NULL; 1423c66ac9dbSNicholas Bellinger struct se_dev_entry *dest_se_deve = NULL, *local_se_deve; 1424c66ac9dbSNicholas Bellinger struct t10_pr_registration *dest_pr_reg, *local_pr_reg, *pr_reg_e; 1425c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe; 1426d0f474e5SRoland Dreier LIST_HEAD(tid_dest_list); 1427c66ac9dbSNicholas Bellinger struct pr_transport_id_holder *tidh_new, *tidh, *tidh_tmp; 1428c66ac9dbSNicholas Bellinger struct target_core_fabric_ops *tmp_tf_ops; 142905d1c7c0SAndy Grover unsigned char *buf; 1430c66ac9dbSNicholas Bellinger unsigned char *ptr, *i_str = NULL, proto_ident, tmp_proto_ident; 1431c66ac9dbSNicholas Bellinger char *iport_ptr = NULL, dest_iport[64], i_buf[PR_REG_ISID_ID_LEN]; 1432de103c93SChristoph Hellwig sense_reason_t ret; 1433c66ac9dbSNicholas Bellinger u32 tpdl, tid_len = 0; 1434d2843c17SAndy Grover int dest_local_nexus; 1435c66ac9dbSNicholas Bellinger u32 dest_rtpi = 0; 1436c66ac9dbSNicholas Bellinger 1437c66ac9dbSNicholas Bellinger memset(dest_iport, 0, 64); 1438c66ac9dbSNicholas Bellinger 1439f2083241SJörn Engel local_se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; 1440c66ac9dbSNicholas Bellinger /* 1441c66ac9dbSNicholas Bellinger * Allocate a struct pr_transport_id_holder and setup the 1442c66ac9dbSNicholas Bellinger * local_node_acl and local_se_deve pointers and add to 1443c66ac9dbSNicholas Bellinger * struct list_head tid_dest_list for add registration 1444c66ac9dbSNicholas Bellinger * processing in the loop of tid_dest_list below. 1445c66ac9dbSNicholas Bellinger */ 1446c66ac9dbSNicholas Bellinger tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), GFP_KERNEL); 14476708bb27SAndy Grover if (!tidh_new) { 14486708bb27SAndy Grover pr_err("Unable to allocate tidh_new\n"); 1449de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1450c66ac9dbSNicholas Bellinger } 1451c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&tidh_new->dest_list); 1452c66ac9dbSNicholas Bellinger tidh_new->dest_tpg = tpg; 1453c66ac9dbSNicholas Bellinger tidh_new->dest_node_acl = se_sess->se_node_acl; 1454c66ac9dbSNicholas Bellinger tidh_new->dest_se_deve = local_se_deve; 1455c66ac9dbSNicholas Bellinger 14565951146dSAndy Grover local_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev, 1457c66ac9dbSNicholas Bellinger se_sess->se_node_acl, local_se_deve, l_isid, 1458c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl); 14596708bb27SAndy Grover if (!local_pr_reg) { 1460c66ac9dbSNicholas Bellinger kfree(tidh_new); 1461de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1462c66ac9dbSNicholas Bellinger } 1463c66ac9dbSNicholas Bellinger tidh_new->dest_pr_reg = local_pr_reg; 1464c66ac9dbSNicholas Bellinger /* 1465c66ac9dbSNicholas Bellinger * The local I_T nexus does not hold any configfs dependances, 1466c66ac9dbSNicholas Bellinger * so we set tid_h->dest_local_nexus=1 to prevent the 1467c66ac9dbSNicholas Bellinger * configfs_undepend_item() calls in the tid_dest_list loops below. 1468c66ac9dbSNicholas Bellinger */ 1469c66ac9dbSNicholas Bellinger tidh_new->dest_local_nexus = 1; 1470c66ac9dbSNicholas Bellinger list_add_tail(&tidh_new->dest_list, &tid_dest_list); 147105d1c7c0SAndy Grover 14720d7f1299SPaolo Bonzini if (cmd->data_length < 28) { 14730d7f1299SPaolo Bonzini pr_warn("SPC-PR: Received PR OUT parameter list" 14740d7f1299SPaolo Bonzini " length too small: %u\n", cmd->data_length); 1475de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 14760d7f1299SPaolo Bonzini goto out; 14770d7f1299SPaolo Bonzini } 14780d7f1299SPaolo Bonzini 14794949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 1480de103c93SChristoph Hellwig if (!buf) { 1481de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1482de103c93SChristoph Hellwig goto out; 1483de103c93SChristoph Hellwig } 1484de103c93SChristoph Hellwig 1485c66ac9dbSNicholas Bellinger /* 1486c66ac9dbSNicholas Bellinger * For a PERSISTENT RESERVE OUT specify initiator ports payload, 1487c66ac9dbSNicholas Bellinger * first extract TransportID Parameter Data Length, and make sure 1488c66ac9dbSNicholas Bellinger * the value matches up to the SCSI expected data transfer length. 1489c66ac9dbSNicholas Bellinger */ 1490c66ac9dbSNicholas Bellinger tpdl = (buf[24] & 0xff) << 24; 1491c66ac9dbSNicholas Bellinger tpdl |= (buf[25] & 0xff) << 16; 1492c66ac9dbSNicholas Bellinger tpdl |= (buf[26] & 0xff) << 8; 1493c66ac9dbSNicholas Bellinger tpdl |= buf[27] & 0xff; 1494c66ac9dbSNicholas Bellinger 1495c66ac9dbSNicholas Bellinger if ((tpdl + 28) != cmd->data_length) { 14966708bb27SAndy Grover pr_err("SPC-3 PR: Illegal tpdl: %u + 28 byte header" 1497c66ac9dbSNicholas Bellinger " does not equal CDB data_length: %u\n", tpdl, 1498c66ac9dbSNicholas Bellinger cmd->data_length); 1499de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 1500de103c93SChristoph Hellwig goto out_unmap; 1501c66ac9dbSNicholas Bellinger } 1502c66ac9dbSNicholas Bellinger /* 1503c66ac9dbSNicholas Bellinger * Start processing the received transport IDs using the 1504c66ac9dbSNicholas Bellinger * receiving I_T Nexus portal's fabric dependent methods to 1505c66ac9dbSNicholas Bellinger * obtain the SCSI Initiator Port/Device Identifiers. 1506c66ac9dbSNicholas Bellinger */ 1507c66ac9dbSNicholas Bellinger ptr = &buf[28]; 1508c66ac9dbSNicholas Bellinger 1509c66ac9dbSNicholas Bellinger while (tpdl > 0) { 1510c66ac9dbSNicholas Bellinger proto_ident = (ptr[0] & 0x0f); 1511c66ac9dbSNicholas Bellinger dest_tpg = NULL; 1512c66ac9dbSNicholas Bellinger 1513c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 1514c66ac9dbSNicholas Bellinger list_for_each_entry(tmp_port, &dev->dev_sep_list, sep_list) { 1515c66ac9dbSNicholas Bellinger tmp_tpg = tmp_port->sep_tpg; 15166708bb27SAndy Grover if (!tmp_tpg) 1517c66ac9dbSNicholas Bellinger continue; 1518e3d6f909SAndy Grover tmp_tf_ops = tmp_tpg->se_tpg_tfo; 15196708bb27SAndy Grover if (!tmp_tf_ops) 1520c66ac9dbSNicholas Bellinger continue; 15216708bb27SAndy Grover if (!tmp_tf_ops->get_fabric_proto_ident || 15226708bb27SAndy Grover !tmp_tf_ops->tpg_parse_pr_out_transport_id) 1523c66ac9dbSNicholas Bellinger continue; 1524c66ac9dbSNicholas Bellinger /* 1525c66ac9dbSNicholas Bellinger * Look for the matching proto_ident provided by 1526c66ac9dbSNicholas Bellinger * the received TransportID 1527c66ac9dbSNicholas Bellinger */ 1528c66ac9dbSNicholas Bellinger tmp_proto_ident = tmp_tf_ops->get_fabric_proto_ident(tmp_tpg); 1529c66ac9dbSNicholas Bellinger if (tmp_proto_ident != proto_ident) 1530c66ac9dbSNicholas Bellinger continue; 1531c66ac9dbSNicholas Bellinger dest_rtpi = tmp_port->sep_rtpi; 1532c66ac9dbSNicholas Bellinger 1533c66ac9dbSNicholas Bellinger i_str = tmp_tf_ops->tpg_parse_pr_out_transport_id( 1534c66ac9dbSNicholas Bellinger tmp_tpg, (const char *)ptr, &tid_len, 1535c66ac9dbSNicholas Bellinger &iport_ptr); 15366708bb27SAndy Grover if (!i_str) 1537c66ac9dbSNicholas Bellinger continue; 1538c66ac9dbSNicholas Bellinger 153933940d09SJoern Engel atomic_inc_mb(&tmp_tpg->tpg_pr_ref_count); 1540c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 1541c66ac9dbSNicholas Bellinger 1542de103c93SChristoph Hellwig if (core_scsi3_tpg_depend_item(tmp_tpg)) { 15436708bb27SAndy Grover pr_err(" core_scsi3_tpg_depend_item()" 1544c66ac9dbSNicholas Bellinger " for tmp_tpg\n"); 154533940d09SJoern Engel atomic_dec_mb(&tmp_tpg->tpg_pr_ref_count); 1546de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1547de103c93SChristoph Hellwig goto out_unmap; 1548c66ac9dbSNicholas Bellinger } 1549c66ac9dbSNicholas Bellinger /* 155035d1efe8SMasanari Iida * Locate the destination initiator ACL to be registered 1551c66ac9dbSNicholas Bellinger * from the decoded fabric module specific TransportID 1552c66ac9dbSNicholas Bellinger * at *i_str. 1553c66ac9dbSNicholas Bellinger */ 155428638887SRoland Dreier spin_lock_irq(&tmp_tpg->acl_node_lock); 1555c66ac9dbSNicholas Bellinger dest_node_acl = __core_tpg_get_initiator_node_acl( 1556c66ac9dbSNicholas Bellinger tmp_tpg, i_str); 155733940d09SJoern Engel if (dest_node_acl) 155833940d09SJoern Engel atomic_inc_mb(&dest_node_acl->acl_pr_ref_count); 155928638887SRoland Dreier spin_unlock_irq(&tmp_tpg->acl_node_lock); 1560c66ac9dbSNicholas Bellinger 15616708bb27SAndy Grover if (!dest_node_acl) { 1562c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(tmp_tpg); 1563c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 1564c66ac9dbSNicholas Bellinger continue; 1565c66ac9dbSNicholas Bellinger } 1566c66ac9dbSNicholas Bellinger 1567de103c93SChristoph Hellwig if (core_scsi3_nodeacl_depend_item(dest_node_acl)) { 15686708bb27SAndy Grover pr_err("configfs_depend_item() failed" 1569c66ac9dbSNicholas Bellinger " for dest_node_acl->acl_group\n"); 157033940d09SJoern Engel atomic_dec_mb(&dest_node_acl->acl_pr_ref_count); 1571c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(tmp_tpg); 1572de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1573de103c93SChristoph Hellwig goto out_unmap; 1574c66ac9dbSNicholas Bellinger } 1575c66ac9dbSNicholas Bellinger 1576c66ac9dbSNicholas Bellinger dest_tpg = tmp_tpg; 15776708bb27SAndy Grover pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node:" 1578c66ac9dbSNicholas Bellinger " %s Port RTPI: %hu\n", 1579e3d6f909SAndy Grover dest_tpg->se_tpg_tfo->get_fabric_name(), 1580c66ac9dbSNicholas Bellinger dest_node_acl->initiatorname, dest_rtpi); 1581c66ac9dbSNicholas Bellinger 1582c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 1583c66ac9dbSNicholas Bellinger break; 1584c66ac9dbSNicholas Bellinger } 1585c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 1586c66ac9dbSNicholas Bellinger 15876708bb27SAndy Grover if (!dest_tpg) { 15886708bb27SAndy Grover pr_err("SPC-3 PR SPEC_I_PT: Unable to locate" 1589c66ac9dbSNicholas Bellinger " dest_tpg\n"); 1590de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 1591de103c93SChristoph Hellwig goto out_unmap; 1592c66ac9dbSNicholas Bellinger } 15938b1e1244SAndy Grover 15946708bb27SAndy Grover pr_debug("SPC-3 PR SPEC_I_PT: Got %s data_length: %u tpdl: %u" 1595c66ac9dbSNicholas Bellinger " tid_len: %d for %s + %s\n", 1596e3d6f909SAndy Grover dest_tpg->se_tpg_tfo->get_fabric_name(), cmd->data_length, 1597c66ac9dbSNicholas Bellinger tpdl, tid_len, i_str, iport_ptr); 15988b1e1244SAndy Grover 1599c66ac9dbSNicholas Bellinger if (tid_len > tpdl) { 16006708bb27SAndy Grover pr_err("SPC-3 PR SPEC_I_PT: Illegal tid_len:" 1601c66ac9dbSNicholas Bellinger " %u for Transport ID: %s\n", tid_len, ptr); 1602c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1603c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1604de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 1605de103c93SChristoph Hellwig goto out_unmap; 1606c66ac9dbSNicholas Bellinger } 1607c66ac9dbSNicholas Bellinger /* 1608c66ac9dbSNicholas Bellinger * Locate the desintation struct se_dev_entry pointer for matching 1609c66ac9dbSNicholas Bellinger * RELATIVE TARGET PORT IDENTIFIER on the receiving I_T Nexus 1610c66ac9dbSNicholas Bellinger * Target Port. 1611c66ac9dbSNicholas Bellinger */ 1612c66ac9dbSNicholas Bellinger dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, 1613c66ac9dbSNicholas Bellinger dest_rtpi); 16146708bb27SAndy Grover if (!dest_se_deve) { 16156708bb27SAndy Grover pr_err("Unable to locate %s dest_se_deve" 1616c66ac9dbSNicholas Bellinger " from destination RTPI: %hu\n", 1617e3d6f909SAndy Grover dest_tpg->se_tpg_tfo->get_fabric_name(), 1618c66ac9dbSNicholas Bellinger dest_rtpi); 1619c66ac9dbSNicholas Bellinger 1620c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1621c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1622de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 1623de103c93SChristoph Hellwig goto out_unmap; 1624c66ac9dbSNicholas Bellinger } 1625c66ac9dbSNicholas Bellinger 1626de103c93SChristoph Hellwig if (core_scsi3_lunacl_depend_item(dest_se_deve)) { 16276708bb27SAndy Grover pr_err("core_scsi3_lunacl_depend_item()" 1628c66ac9dbSNicholas Bellinger " failed\n"); 162933940d09SJoern Engel atomic_dec_mb(&dest_se_deve->pr_ref_count); 1630c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1631c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1632de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1633de103c93SChristoph Hellwig goto out_unmap; 1634c66ac9dbSNicholas Bellinger } 16358b1e1244SAndy Grover 16366708bb27SAndy Grover pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node: %s" 1637c66ac9dbSNicholas Bellinger " dest_se_deve mapped_lun: %u\n", 1638e3d6f909SAndy Grover dest_tpg->se_tpg_tfo->get_fabric_name(), 1639c66ac9dbSNicholas Bellinger dest_node_acl->initiatorname, dest_se_deve->mapped_lun); 16408b1e1244SAndy Grover 1641c66ac9dbSNicholas Bellinger /* 1642c66ac9dbSNicholas Bellinger * Skip any TransportIDs that already have a registration for 1643c66ac9dbSNicholas Bellinger * this target port. 1644c66ac9dbSNicholas Bellinger */ 1645c66ac9dbSNicholas Bellinger pr_reg_e = __core_scsi3_locate_pr_reg(dev, dest_node_acl, 1646c66ac9dbSNicholas Bellinger iport_ptr); 1647c66ac9dbSNicholas Bellinger if (pr_reg_e) { 1648c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_e); 1649c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1650c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1651c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1652c66ac9dbSNicholas Bellinger ptr += tid_len; 1653c66ac9dbSNicholas Bellinger tpdl -= tid_len; 1654c66ac9dbSNicholas Bellinger tid_len = 0; 1655c66ac9dbSNicholas Bellinger continue; 1656c66ac9dbSNicholas Bellinger } 1657c66ac9dbSNicholas Bellinger /* 1658c66ac9dbSNicholas Bellinger * Allocate a struct pr_transport_id_holder and setup 1659c66ac9dbSNicholas Bellinger * the dest_node_acl and dest_se_deve pointers for the 1660c66ac9dbSNicholas Bellinger * loop below. 1661c66ac9dbSNicholas Bellinger */ 1662c66ac9dbSNicholas Bellinger tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), 1663c66ac9dbSNicholas Bellinger GFP_KERNEL); 16646708bb27SAndy Grover if (!tidh_new) { 16656708bb27SAndy Grover pr_err("Unable to allocate tidh_new\n"); 1666c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1667c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1668c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1669de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1670de103c93SChristoph Hellwig goto out_unmap; 1671c66ac9dbSNicholas Bellinger } 1672c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&tidh_new->dest_list); 1673c66ac9dbSNicholas Bellinger tidh_new->dest_tpg = dest_tpg; 1674c66ac9dbSNicholas Bellinger tidh_new->dest_node_acl = dest_node_acl; 1675c66ac9dbSNicholas Bellinger tidh_new->dest_se_deve = dest_se_deve; 1676c66ac9dbSNicholas Bellinger 1677c66ac9dbSNicholas Bellinger /* 1678c66ac9dbSNicholas Bellinger * Allocate, but do NOT add the registration for the 1679c66ac9dbSNicholas Bellinger * TransportID referenced SCSI Initiator port. This 1680c66ac9dbSNicholas Bellinger * done because of the following from spc4r17 in section 1681c66ac9dbSNicholas Bellinger * 6.14.3 wrt SPEC_I_PT: 1682c66ac9dbSNicholas Bellinger * 1683c66ac9dbSNicholas Bellinger * "If a registration fails for any initiator port (e.g., if th 1684c66ac9dbSNicholas Bellinger * logical unit does not have enough resources available to 1685c66ac9dbSNicholas Bellinger * hold the registration information), no registrations shall be 1686c66ac9dbSNicholas Bellinger * made, and the command shall be terminated with 1687c66ac9dbSNicholas Bellinger * CHECK CONDITION status." 1688c66ac9dbSNicholas Bellinger * 1689c66ac9dbSNicholas Bellinger * That means we call __core_scsi3_alloc_registration() here, 1690c66ac9dbSNicholas Bellinger * and then call __core_scsi3_add_registration() in the 1691c66ac9dbSNicholas Bellinger * 2nd loop which will never fail. 1692c66ac9dbSNicholas Bellinger */ 16935951146dSAndy Grover dest_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev, 1694c66ac9dbSNicholas Bellinger dest_node_acl, dest_se_deve, iport_ptr, 1695c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl); 16966708bb27SAndy Grover if (!dest_pr_reg) { 1697c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1698c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1699c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1700c66ac9dbSNicholas Bellinger kfree(tidh_new); 1701de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 1702de103c93SChristoph Hellwig goto out_unmap; 1703c66ac9dbSNicholas Bellinger } 1704c66ac9dbSNicholas Bellinger tidh_new->dest_pr_reg = dest_pr_reg; 1705c66ac9dbSNicholas Bellinger list_add_tail(&tidh_new->dest_list, &tid_dest_list); 1706c66ac9dbSNicholas Bellinger 1707c66ac9dbSNicholas Bellinger ptr += tid_len; 1708c66ac9dbSNicholas Bellinger tpdl -= tid_len; 1709c66ac9dbSNicholas Bellinger tid_len = 0; 1710c66ac9dbSNicholas Bellinger 1711c66ac9dbSNicholas Bellinger } 171205d1c7c0SAndy Grover 17134949314cSAndy Grover transport_kunmap_data_sg(cmd); 171405d1c7c0SAndy Grover 1715c66ac9dbSNicholas Bellinger /* 1716c66ac9dbSNicholas Bellinger * Go ahead and create a registrations from tid_dest_list for the 1717c66ac9dbSNicholas Bellinger * SPEC_I_PT provided TransportID for the *tidh referenced dest_node_acl 1718c66ac9dbSNicholas Bellinger * and dest_se_deve. 1719c66ac9dbSNicholas Bellinger * 1720c66ac9dbSNicholas Bellinger * The SA Reservation Key from the PROUT is set for the 1721c66ac9dbSNicholas Bellinger * registration, and ALL_TG_PT is also passed. ALL_TG_PT=1 1722c66ac9dbSNicholas Bellinger * means that the TransportID Initiator port will be 1723c66ac9dbSNicholas Bellinger * registered on all of the target ports in the SCSI target device 1724c66ac9dbSNicholas Bellinger * ALL_TG_PT=0 means the registration will only be for the 1725c66ac9dbSNicholas Bellinger * SCSI target port the PROUT REGISTER with SPEC_I_PT=1 1726c66ac9dbSNicholas Bellinger * was received. 1727c66ac9dbSNicholas Bellinger */ 1728c66ac9dbSNicholas Bellinger list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) { 1729c66ac9dbSNicholas Bellinger dest_tpg = tidh->dest_tpg; 1730c66ac9dbSNicholas Bellinger dest_node_acl = tidh->dest_node_acl; 1731c66ac9dbSNicholas Bellinger dest_se_deve = tidh->dest_se_deve; 1732c66ac9dbSNicholas Bellinger dest_pr_reg = tidh->dest_pr_reg; 1733c66ac9dbSNicholas Bellinger dest_local_nexus = tidh->dest_local_nexus; 1734c66ac9dbSNicholas Bellinger 1735c66ac9dbSNicholas Bellinger list_del(&tidh->dest_list); 1736c66ac9dbSNicholas Bellinger kfree(tidh); 1737c66ac9dbSNicholas Bellinger 1738c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1739d2843c17SAndy Grover core_pr_dump_initiator_port(dest_pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1740c66ac9dbSNicholas Bellinger 17415951146dSAndy Grover __core_scsi3_add_registration(cmd->se_dev, dest_node_acl, 1742c66ac9dbSNicholas Bellinger dest_pr_reg, 0, 0); 1743c66ac9dbSNicholas Bellinger 17446708bb27SAndy Grover pr_debug("SPC-3 PR [%s] SPEC_I_PT: Successfully" 1745c66ac9dbSNicholas Bellinger " registered Transport ID for Node: %s%s Mapped LUN:" 1746e3d6f909SAndy Grover " %u\n", dest_tpg->se_tpg_tfo->get_fabric_name(), 1747d2843c17SAndy Grover dest_node_acl->initiatorname, i_buf, dest_se_deve->mapped_lun); 1748c66ac9dbSNicholas Bellinger 1749c66ac9dbSNicholas Bellinger if (dest_local_nexus) 1750c66ac9dbSNicholas Bellinger continue; 1751c66ac9dbSNicholas Bellinger 1752c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1753c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1754c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1755c66ac9dbSNicholas Bellinger } 1756c66ac9dbSNicholas Bellinger 1757c66ac9dbSNicholas Bellinger return 0; 1758de103c93SChristoph Hellwig out_unmap: 17594949314cSAndy Grover transport_kunmap_data_sg(cmd); 1760de103c93SChristoph Hellwig out: 1761c66ac9dbSNicholas Bellinger /* 1762c66ac9dbSNicholas Bellinger * For the failure case, release everything from tid_dest_list 1763c66ac9dbSNicholas Bellinger * including *dest_pr_reg and the configfs dependances.. 1764c66ac9dbSNicholas Bellinger */ 1765c66ac9dbSNicholas Bellinger list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) { 1766c66ac9dbSNicholas Bellinger dest_tpg = tidh->dest_tpg; 1767c66ac9dbSNicholas Bellinger dest_node_acl = tidh->dest_node_acl; 1768c66ac9dbSNicholas Bellinger dest_se_deve = tidh->dest_se_deve; 1769c66ac9dbSNicholas Bellinger dest_pr_reg = tidh->dest_pr_reg; 1770c66ac9dbSNicholas Bellinger dest_local_nexus = tidh->dest_local_nexus; 1771c66ac9dbSNicholas Bellinger 1772c66ac9dbSNicholas Bellinger list_del(&tidh->dest_list); 1773c66ac9dbSNicholas Bellinger kfree(tidh); 1774c66ac9dbSNicholas Bellinger /* 1775c66ac9dbSNicholas Bellinger * Release any extra ALL_TG_PT=1 registrations for 1776c66ac9dbSNicholas Bellinger * the SPEC_I_PT=1 case. 1777c66ac9dbSNicholas Bellinger */ 1778c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, 1779c66ac9dbSNicholas Bellinger &dest_pr_reg->pr_reg_atp_list, 1780c66ac9dbSNicholas Bellinger pr_reg_atp_mem_list) { 1781c66ac9dbSNicholas Bellinger list_del(&pr_reg_tmp->pr_reg_atp_mem_list); 1782c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); 1783c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp); 1784c66ac9dbSNicholas Bellinger } 1785c66ac9dbSNicholas Bellinger 1786c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, dest_pr_reg); 1787c66ac9dbSNicholas Bellinger 1788c66ac9dbSNicholas Bellinger if (dest_local_nexus) 1789c66ac9dbSNicholas Bellinger continue; 1790c66ac9dbSNicholas Bellinger 1791c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1792c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1793c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1794c66ac9dbSNicholas Bellinger } 1795c66ac9dbSNicholas Bellinger return ret; 1796c66ac9dbSNicholas Bellinger } 1797c66ac9dbSNicholas Bellinger 17983c8a6228SAndy Grover static int core_scsi3_update_aptpl_buf( 1799c66ac9dbSNicholas Bellinger struct se_device *dev, 1800c66ac9dbSNicholas Bellinger unsigned char *buf, 18010607decdSAndy Grover u32 pr_aptpl_buf_len) 1802c66ac9dbSNicholas Bellinger { 1803c66ac9dbSNicholas Bellinger struct se_lun *lun; 1804c66ac9dbSNicholas Bellinger struct se_portal_group *tpg; 1805c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 1806c66ac9dbSNicholas Bellinger unsigned char tmp[512], isid_buf[32]; 1807c66ac9dbSNicholas Bellinger ssize_t len = 0; 1808c66ac9dbSNicholas Bellinger int reg_count = 0; 18093c8a6228SAndy Grover int ret = 0; 1810c66ac9dbSNicholas Bellinger 18113c8a6228SAndy Grover spin_lock(&dev->dev_reservation_lock); 18123c8a6228SAndy Grover spin_lock(&dev->t10_pr.registration_lock); 1813c66ac9dbSNicholas Bellinger /* 1814c66ac9dbSNicholas Bellinger * Walk the registration list.. 1815c66ac9dbSNicholas Bellinger */ 18160fd97ccfSChristoph Hellwig list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 1817c66ac9dbSNicholas Bellinger pr_reg_list) { 1818c66ac9dbSNicholas Bellinger 1819c66ac9dbSNicholas Bellinger tmp[0] = '\0'; 1820c66ac9dbSNicholas Bellinger isid_buf[0] = '\0'; 1821c66ac9dbSNicholas Bellinger tpg = pr_reg->pr_reg_nacl->se_tpg; 1822c66ac9dbSNicholas Bellinger lun = pr_reg->pr_reg_tg_pt_lun; 1823c66ac9dbSNicholas Bellinger /* 1824c66ac9dbSNicholas Bellinger * Write out any ISID value to APTPL metadata that was included 1825c66ac9dbSNicholas Bellinger * in the original registration. 1826c66ac9dbSNicholas Bellinger */ 1827c66ac9dbSNicholas Bellinger if (pr_reg->isid_present_at_reg) 1828c66ac9dbSNicholas Bellinger snprintf(isid_buf, 32, "initiator_sid=%s\n", 1829c66ac9dbSNicholas Bellinger pr_reg->pr_reg_isid); 1830c66ac9dbSNicholas Bellinger /* 1831c66ac9dbSNicholas Bellinger * Include special metadata if the pr_reg matches the 1832c66ac9dbSNicholas Bellinger * reservation holder. 1833c66ac9dbSNicholas Bellinger */ 1834c66ac9dbSNicholas Bellinger if (dev->dev_pr_res_holder == pr_reg) { 1835c66ac9dbSNicholas Bellinger snprintf(tmp, 512, "PR_REG_START: %d" 1836c66ac9dbSNicholas Bellinger "\ninitiator_fabric=%s\n" 1837c66ac9dbSNicholas Bellinger "initiator_node=%s\n%s" 1838c66ac9dbSNicholas Bellinger "sa_res_key=%llu\n" 1839c66ac9dbSNicholas Bellinger "res_holder=1\nres_type=%02x\n" 1840c66ac9dbSNicholas Bellinger "res_scope=%02x\nres_all_tg_pt=%d\n" 1841c66ac9dbSNicholas Bellinger "mapped_lun=%u\n", reg_count, 1842e3d6f909SAndy Grover tpg->se_tpg_tfo->get_fabric_name(), 1843c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->initiatorname, isid_buf, 1844c66ac9dbSNicholas Bellinger pr_reg->pr_res_key, pr_reg->pr_res_type, 1845c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope, pr_reg->pr_reg_all_tg_pt, 1846c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun); 1847c66ac9dbSNicholas Bellinger } else { 1848c66ac9dbSNicholas Bellinger snprintf(tmp, 512, "PR_REG_START: %d\n" 1849c66ac9dbSNicholas Bellinger "initiator_fabric=%s\ninitiator_node=%s\n%s" 1850c66ac9dbSNicholas Bellinger "sa_res_key=%llu\nres_holder=0\n" 1851c66ac9dbSNicholas Bellinger "res_all_tg_pt=%d\nmapped_lun=%u\n", 1852e3d6f909SAndy Grover reg_count, tpg->se_tpg_tfo->get_fabric_name(), 1853c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->initiatorname, isid_buf, 1854c66ac9dbSNicholas Bellinger pr_reg->pr_res_key, pr_reg->pr_reg_all_tg_pt, 1855c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun); 1856c66ac9dbSNicholas Bellinger } 1857c66ac9dbSNicholas Bellinger 185860d645a4SDan Carpenter if ((len + strlen(tmp) >= pr_aptpl_buf_len)) { 18596708bb27SAndy Grover pr_err("Unable to update renaming" 1860c66ac9dbSNicholas Bellinger " APTPL metadata\n"); 18613c8a6228SAndy Grover ret = -EMSGSIZE; 18623c8a6228SAndy Grover goto out; 1863c66ac9dbSNicholas Bellinger } 1864c66ac9dbSNicholas Bellinger len += sprintf(buf+len, "%s", tmp); 1865c66ac9dbSNicholas Bellinger 1866c66ac9dbSNicholas Bellinger /* 1867c66ac9dbSNicholas Bellinger * Include information about the associated SCSI target port. 1868c66ac9dbSNicholas Bellinger */ 1869c66ac9dbSNicholas Bellinger snprintf(tmp, 512, "target_fabric=%s\ntarget_node=%s\n" 1870c66ac9dbSNicholas Bellinger "tpgt=%hu\nport_rtpi=%hu\ntarget_lun=%u\nPR_REG_END:" 1871e3d6f909SAndy Grover " %d\n", tpg->se_tpg_tfo->get_fabric_name(), 1872e3d6f909SAndy Grover tpg->se_tpg_tfo->tpg_get_wwn(tpg), 1873e3d6f909SAndy Grover tpg->se_tpg_tfo->tpg_get_tag(tpg), 1874c66ac9dbSNicholas Bellinger lun->lun_sep->sep_rtpi, lun->unpacked_lun, reg_count); 1875c66ac9dbSNicholas Bellinger 187660d645a4SDan Carpenter if ((len + strlen(tmp) >= pr_aptpl_buf_len)) { 18776708bb27SAndy Grover pr_err("Unable to update renaming" 1878c66ac9dbSNicholas Bellinger " APTPL metadata\n"); 18793c8a6228SAndy Grover ret = -EMSGSIZE; 18803c8a6228SAndy Grover goto out; 1881c66ac9dbSNicholas Bellinger } 1882c66ac9dbSNicholas Bellinger len += sprintf(buf+len, "%s", tmp); 1883c66ac9dbSNicholas Bellinger reg_count++; 1884c66ac9dbSNicholas Bellinger } 1885c66ac9dbSNicholas Bellinger 18866708bb27SAndy Grover if (!reg_count) 1887c66ac9dbSNicholas Bellinger len += sprintf(buf+len, "No Registrations or Reservations"); 1888c66ac9dbSNicholas Bellinger 18893c8a6228SAndy Grover out: 18903c8a6228SAndy Grover spin_unlock(&dev->t10_pr.registration_lock); 1891c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1892c66ac9dbSNicholas Bellinger 1893c66ac9dbSNicholas Bellinger return ret; 1894c66ac9dbSNicholas Bellinger } 1895c66ac9dbSNicholas Bellinger 1896c66ac9dbSNicholas Bellinger static int __core_scsi3_write_aptpl_to_file( 1897c66ac9dbSNicholas Bellinger struct se_device *dev, 18984dee96fbSAndy Grover unsigned char *buf) 1899c66ac9dbSNicholas Bellinger { 19000fd97ccfSChristoph Hellwig struct t10_wwn *wwn = &dev->t10_wwn; 1901c66ac9dbSNicholas Bellinger struct file *file; 1902c66ac9dbSNicholas Bellinger int flags = O_RDWR | O_CREAT | O_TRUNC; 1903c66ac9dbSNicholas Bellinger char path[512]; 19044dee96fbSAndy Grover u32 pr_aptpl_buf_len; 1905c66ac9dbSNicholas Bellinger int ret; 1906c66ac9dbSNicholas Bellinger 1907c66ac9dbSNicholas Bellinger memset(path, 0, 512); 1908c66ac9dbSNicholas Bellinger 190960d645a4SDan Carpenter if (strlen(&wwn->unit_serial[0]) >= 512) { 19106708bb27SAndy Grover pr_err("WWN value for struct se_device does not fit" 1911c66ac9dbSNicholas Bellinger " into path buffer\n"); 1912e3d6f909SAndy Grover return -EMSGSIZE; 1913c66ac9dbSNicholas Bellinger } 1914c66ac9dbSNicholas Bellinger 1915c66ac9dbSNicholas Bellinger snprintf(path, 512, "/var/target/pr/aptpl_%s", &wwn->unit_serial[0]); 1916c66ac9dbSNicholas Bellinger file = filp_open(path, flags, 0600); 19170e9b10a9SAl Viro if (IS_ERR(file)) { 19186708bb27SAndy Grover pr_err("filp_open(%s) for APTPL metadata" 1919c66ac9dbSNicholas Bellinger " failed\n", path); 19200e9b10a9SAl Viro return PTR_ERR(file); 1921c66ac9dbSNicholas Bellinger } 1922c66ac9dbSNicholas Bellinger 19234dee96fbSAndy Grover pr_aptpl_buf_len = (strlen(buf) + 1); /* Add extra for NULL */ 1924c66ac9dbSNicholas Bellinger 19250e9b10a9SAl Viro ret = kernel_write(file, buf, pr_aptpl_buf_len, 0); 1926c66ac9dbSNicholas Bellinger 19270e9b10a9SAl Viro if (ret < 0) 19286708bb27SAndy Grover pr_debug("Error writing APTPL metadata file: %s\n", path); 19290e9b10a9SAl Viro fput(file); 1930c66ac9dbSNicholas Bellinger 1931f730f915SGera Kazakov return (ret < 0) ? -EIO : 0; 1932c66ac9dbSNicholas Bellinger } 1933c66ac9dbSNicholas Bellinger 1934c66ac9dbSNicholas Bellinger /* 1935459f213bSAndy Grover * Clear the APTPL metadata if APTPL has been disabled, otherwise 1936459f213bSAndy Grover * write out the updated metadata to struct file for this SCSI device. 1937c66ac9dbSNicholas Bellinger */ 19388a391857SNicholas Bellinger static sense_reason_t core_scsi3_update_and_write_aptpl(struct se_device *dev, bool aptpl) 1939459f213bSAndy Grover { 19408a391857SNicholas Bellinger unsigned char *buf; 19418a391857SNicholas Bellinger int rc; 1942459f213bSAndy Grover 1943459f213bSAndy Grover if (!aptpl) { 1944459f213bSAndy Grover char *null_buf = "No Registrations or Reservations\n"; 1945459f213bSAndy Grover 19468a391857SNicholas Bellinger rc = __core_scsi3_write_aptpl_to_file(dev, null_buf); 1947459f213bSAndy Grover dev->t10_pr.pr_aptpl_active = 0; 1948459f213bSAndy Grover pr_debug("SPC-3 PR: Set APTPL Bit Deactivated\n"); 19498a391857SNicholas Bellinger 19508a391857SNicholas Bellinger if (rc) 19518a391857SNicholas Bellinger return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 19528a391857SNicholas Bellinger 19538a391857SNicholas Bellinger return 0; 19548a391857SNicholas Bellinger } 1955459f213bSAndy Grover 1956459f213bSAndy Grover buf = kzalloc(PR_APTPL_BUF_LEN, GFP_KERNEL); 1957459f213bSAndy Grover if (!buf) 19588a391857SNicholas Bellinger return TCM_OUT_OF_RESOURCES; 1959459f213bSAndy Grover 19608a391857SNicholas Bellinger rc = core_scsi3_update_aptpl_buf(dev, buf, PR_APTPL_BUF_LEN); 19618a391857SNicholas Bellinger if (rc < 0) { 1962459f213bSAndy Grover kfree(buf); 19638a391857SNicholas Bellinger return TCM_OUT_OF_RESOURCES; 19640607decdSAndy Grover } 1965de103c93SChristoph Hellwig 19668a391857SNicholas Bellinger rc = __core_scsi3_write_aptpl_to_file(dev, buf); 19678a391857SNicholas Bellinger if (rc != 0) { 1968459f213bSAndy Grover pr_err("SPC-3 PR: Could not update APTPL\n"); 1969459f213bSAndy Grover kfree(buf); 19708a391857SNicholas Bellinger return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1971459f213bSAndy Grover } 19728a391857SNicholas Bellinger dev->t10_pr.pr_aptpl_active = 1; 19738a391857SNicholas Bellinger kfree(buf); 19748a391857SNicholas Bellinger pr_debug("SPC-3 PR: Set APTPL Bit Activated\n"); 19758a391857SNicholas Bellinger return 0; 1976c66ac9dbSNicholas Bellinger } 1977c66ac9dbSNicholas Bellinger 1978de103c93SChristoph Hellwig static sense_reason_t 1979de103c93SChristoph Hellwig core_scsi3_emulate_pro_register(struct se_cmd *cmd, u64 res_key, u64 sa_res_key, 1980bc118fe4SAndy Grover bool aptpl, bool all_tg_pt, bool spec_i_pt, enum register_type register_type) 1981c66ac9dbSNicholas Bellinger { 1982e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 19835951146dSAndy Grover struct se_device *dev = cmd->se_dev; 1984c66ac9dbSNicholas Bellinger struct se_dev_entry *se_deve; 1985e3d6f909SAndy Grover struct se_lun *se_lun = cmd->se_lun; 1986c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg; 1987bc118fe4SAndy Grover struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_reg_tmp; 19880fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 1989c66ac9dbSNicholas Bellinger unsigned char isid_buf[PR_REG_ISID_LEN], *isid_ptr = NULL; 1990a0d50f62SHannes Reinecke sense_reason_t ret = TCM_NO_SENSE; 1991fc09149dSNicholas Bellinger int pr_holder = 0, type; 1992c66ac9dbSNicholas Bellinger 19936708bb27SAndy Grover if (!se_sess || !se_lun) { 19946708bb27SAndy Grover pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); 1995de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1996c66ac9dbSNicholas Bellinger } 1997c66ac9dbSNicholas Bellinger se_tpg = se_sess->se_tpg; 1998f2083241SJörn Engel se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; 1999c66ac9dbSNicholas Bellinger 2000e3d6f909SAndy Grover if (se_tpg->se_tpg_tfo->sess_get_initiator_sid) { 2001c66ac9dbSNicholas Bellinger memset(&isid_buf[0], 0, PR_REG_ISID_LEN); 2002e3d6f909SAndy Grover se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, &isid_buf[0], 2003c66ac9dbSNicholas Bellinger PR_REG_ISID_LEN); 2004c66ac9dbSNicholas Bellinger isid_ptr = &isid_buf[0]; 2005c66ac9dbSNicholas Bellinger } 2006c66ac9dbSNicholas Bellinger /* 2007c66ac9dbSNicholas Bellinger * Follow logic from spc4r17 Section 5.7.7, Register Behaviors Table 47 2008c66ac9dbSNicholas Bellinger */ 2009bc118fe4SAndy Grover pr_reg = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess); 2010bc118fe4SAndy Grover if (!pr_reg) { 2011c66ac9dbSNicholas Bellinger if (res_key) { 20126708bb27SAndy Grover pr_warn("SPC-3 PR: Reservation Key non-zero" 2013c66ac9dbSNicholas Bellinger " for SA REGISTER, returning CONFLICT\n"); 2014de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 2015c66ac9dbSNicholas Bellinger } 2016c66ac9dbSNicholas Bellinger /* 2017c66ac9dbSNicholas Bellinger * Do nothing but return GOOD status. 2018c66ac9dbSNicholas Bellinger */ 20196708bb27SAndy Grover if (!sa_res_key) 202003e98c9eSNicholas Bellinger return 0; 2021c66ac9dbSNicholas Bellinger 20226708bb27SAndy Grover if (!spec_i_pt) { 2023c66ac9dbSNicholas Bellinger /* 2024c66ac9dbSNicholas Bellinger * Perform the Service Action REGISTER on the Initiator 2025c66ac9dbSNicholas Bellinger * Port Endpoint that the PRO was received from on the 2026c66ac9dbSNicholas Bellinger * Logical Unit of the SCSI device server. 2027c66ac9dbSNicholas Bellinger */ 2028de103c93SChristoph Hellwig if (core_scsi3_alloc_registration(cmd->se_dev, 2029c66ac9dbSNicholas Bellinger se_sess->se_node_acl, se_deve, isid_ptr, 2030c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl, 203133ce6a87SAndy Grover register_type, 0)) { 20326708bb27SAndy Grover pr_err("Unable to allocate" 2033c66ac9dbSNicholas Bellinger " struct t10_pr_registration\n"); 2034de103c93SChristoph Hellwig return TCM_INVALID_PARAMETER_LIST; 2035c66ac9dbSNicholas Bellinger } 2036c66ac9dbSNicholas Bellinger } else { 2037c66ac9dbSNicholas Bellinger /* 2038c66ac9dbSNicholas Bellinger * Register both the Initiator port that received 2039c66ac9dbSNicholas Bellinger * PROUT SA REGISTER + SPEC_I_PT=1 and extract SCSI 2040c66ac9dbSNicholas Bellinger * TransportID from Parameter list and loop through 2041c66ac9dbSNicholas Bellinger * fabric dependent parameter list while calling 2042c66ac9dbSNicholas Bellinger * logic from of core_scsi3_alloc_registration() for 2043c66ac9dbSNicholas Bellinger * each TransportID provided SCSI Initiator Port/Device 2044c66ac9dbSNicholas Bellinger */ 2045c66ac9dbSNicholas Bellinger ret = core_scsi3_decode_spec_i_port(cmd, se_tpg, 2046c66ac9dbSNicholas Bellinger isid_ptr, sa_res_key, all_tg_pt, aptpl); 2047c66ac9dbSNicholas Bellinger if (ret != 0) 2048c66ac9dbSNicholas Bellinger return ret; 2049c66ac9dbSNicholas Bellinger } 2050c66ac9dbSNicholas Bellinger 2051459f213bSAndy Grover return core_scsi3_update_and_write_aptpl(dev, aptpl); 2052de103c93SChristoph Hellwig } 2053de103c93SChristoph Hellwig 2054bc118fe4SAndy Grover /* ok, existing registration */ 2055c66ac9dbSNicholas Bellinger 2056bc118fe4SAndy Grover if ((register_type == REGISTER) && (res_key != pr_reg->pr_res_key)) { 20576708bb27SAndy Grover pr_err("SPC-3 PR REGISTER: Received" 2058c66ac9dbSNicholas Bellinger " res_key: 0x%016Lx does not match" 2059c66ac9dbSNicholas Bellinger " existing SA REGISTER res_key:" 2060c66ac9dbSNicholas Bellinger " 0x%016Lx\n", res_key, 2061c66ac9dbSNicholas Bellinger pr_reg->pr_res_key); 2062de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 2063bc118fe4SAndy Grover goto out; 2064c66ac9dbSNicholas Bellinger } 2065de103c93SChristoph Hellwig 2066c66ac9dbSNicholas Bellinger if (spec_i_pt) { 20671f070cc2SAndy Grover pr_err("SPC-3 PR REGISTER: SPEC_I_PT" 20681f070cc2SAndy Grover " set on a registered nexus\n"); 2069de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 2070bc118fe4SAndy Grover goto out; 2071c66ac9dbSNicholas Bellinger } 2072de103c93SChristoph Hellwig 2073c66ac9dbSNicholas Bellinger /* 2074c66ac9dbSNicholas Bellinger * An existing ALL_TG_PT=1 registration being released 2075c66ac9dbSNicholas Bellinger * must also set ALL_TG_PT=1 in the incoming PROUT. 2076c66ac9dbSNicholas Bellinger */ 20771f070cc2SAndy Grover if (pr_reg->pr_reg_all_tg_pt && !all_tg_pt) { 20781f070cc2SAndy Grover pr_err("SPC-3 PR REGISTER: ALL_TG_PT=1" 2079c66ac9dbSNicholas Bellinger " registration exists, but ALL_TG_PT=1 bit not" 2080c66ac9dbSNicholas Bellinger " present in received PROUT\n"); 2081de103c93SChristoph Hellwig ret = TCM_INVALID_CDB_FIELD; 2082bc118fe4SAndy Grover goto out; 2083c66ac9dbSNicholas Bellinger } 2084de103c93SChristoph Hellwig 2085c66ac9dbSNicholas Bellinger /* 208651d9c41dSAndy Grover * sa_res_key=1 Change Reservation Key for registered I_T Nexus. 2087c66ac9dbSNicholas Bellinger */ 208851d9c41dSAndy Grover if (sa_res_key) { 208951d9c41dSAndy Grover /* 209051d9c41dSAndy Grover * Increment PRgeneration counter for struct se_device" 209151d9c41dSAndy Grover * upon a successful REGISTER, see spc4r17 section 6.3.2 209251d9c41dSAndy Grover * READ_KEYS service action. 209351d9c41dSAndy Grover */ 209451d9c41dSAndy Grover pr_reg->pr_res_generation = core_scsi3_pr_generation(cmd->se_dev); 209551d9c41dSAndy Grover pr_reg->pr_res_key = sa_res_key; 209651d9c41dSAndy Grover pr_debug("SPC-3 PR [%s] REGISTER%s: Changed Reservation" 209751d9c41dSAndy Grover " Key for %s to: 0x%016Lx PRgeneration:" 209851d9c41dSAndy Grover " 0x%08x\n", cmd->se_tfo->get_fabric_name(), 209951d9c41dSAndy Grover (register_type == REGISTER_AND_IGNORE_EXISTING_KEY) ? "_AND_IGNORE_EXISTING_KEY" : "", 210051d9c41dSAndy Grover pr_reg->pr_reg_nacl->initiatorname, 210151d9c41dSAndy Grover pr_reg->pr_res_key, pr_reg->pr_res_generation); 210251d9c41dSAndy Grover 210351d9c41dSAndy Grover } else { 210451d9c41dSAndy Grover /* 210551d9c41dSAndy Grover * sa_res_key=0 Unregister Reservation Key for registered I_T Nexus. 210651d9c41dSAndy Grover */ 2107125d0119SHannes Reinecke pr_holder = core_scsi3_check_implicit_release( 21085951146dSAndy Grover cmd->se_dev, pr_reg); 2109c66ac9dbSNicholas Bellinger if (pr_holder < 0) { 2110de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 2111bc118fe4SAndy Grover goto out; 2112c66ac9dbSNicholas Bellinger } 2113fc09149dSNicholas Bellinger type = pr_reg->pr_res_type; 2114c66ac9dbSNicholas Bellinger 2115c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 2116c66ac9dbSNicholas Bellinger /* 2117c66ac9dbSNicholas Bellinger * Release all ALL_TG_PT=1 for the matching SCSI Initiator Port 2118c66ac9dbSNicholas Bellinger * and matching pr_res_key. 2119c66ac9dbSNicholas Bellinger */ 2120c66ac9dbSNicholas Bellinger if (pr_reg->pr_reg_all_tg_pt) { 2121c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg_p, pr_reg_tmp, 2122c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, 2123c66ac9dbSNicholas Bellinger pr_reg_list) { 2124c66ac9dbSNicholas Bellinger 21256708bb27SAndy Grover if (!pr_reg_p->pr_reg_all_tg_pt) 2126c66ac9dbSNicholas Bellinger continue; 2127c66ac9dbSNicholas Bellinger if (pr_reg_p->pr_res_key != res_key) 2128c66ac9dbSNicholas Bellinger continue; 2129c66ac9dbSNicholas Bellinger if (pr_reg == pr_reg_p) 2130c66ac9dbSNicholas Bellinger continue; 2131c66ac9dbSNicholas Bellinger if (strcmp(pr_reg->pr_reg_nacl->initiatorname, 2132c66ac9dbSNicholas Bellinger pr_reg_p->pr_reg_nacl->initiatorname)) 2133c66ac9dbSNicholas Bellinger continue; 2134c66ac9dbSNicholas Bellinger 2135c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, 2136c66ac9dbSNicholas Bellinger pr_reg_p, NULL, 0); 2137c66ac9dbSNicholas Bellinger } 2138c66ac9dbSNicholas Bellinger } 2139de103c93SChristoph Hellwig 2140c66ac9dbSNicholas Bellinger /* 2141c66ac9dbSNicholas Bellinger * Release the calling I_T Nexus registration now.. 2142c66ac9dbSNicholas Bellinger */ 2143de103c93SChristoph Hellwig __core_scsi3_free_registration(cmd->se_dev, pr_reg, NULL, 1); 2144fc09149dSNicholas Bellinger pr_reg = NULL; 2145de103c93SChristoph Hellwig 2146c66ac9dbSNicholas Bellinger /* 2147c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.11.3 Unregistering 2148c66ac9dbSNicholas Bellinger * 2149c66ac9dbSNicholas Bellinger * If the persistent reservation is a registrants only 2150c66ac9dbSNicholas Bellinger * type, the device server shall establish a unit 2151c66ac9dbSNicholas Bellinger * attention condition for the initiator port associated 2152c66ac9dbSNicholas Bellinger * with every registered I_T nexus except for the I_T 2153c66ac9dbSNicholas Bellinger * nexus on which the PERSISTENT RESERVE OUT command was 2154c66ac9dbSNicholas Bellinger * received, with the additional sense code set to 2155c66ac9dbSNicholas Bellinger * RESERVATIONS RELEASED. 2156c66ac9dbSNicholas Bellinger */ 2157c66ac9dbSNicholas Bellinger if (pr_holder && 2158fc09149dSNicholas Bellinger (type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY || 2159fc09149dSNicholas Bellinger type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY)) { 2160c66ac9dbSNicholas Bellinger list_for_each_entry(pr_reg_p, 2161c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, 2162c66ac9dbSNicholas Bellinger pr_reg_list) { 2163c66ac9dbSNicholas Bellinger 2164c66ac9dbSNicholas Bellinger core_scsi3_ua_allocate( 2165c66ac9dbSNicholas Bellinger pr_reg_p->pr_reg_nacl, 2166c66ac9dbSNicholas Bellinger pr_reg_p->pr_res_mapped_lun, 2167c66ac9dbSNicholas Bellinger 0x2A, 2168c66ac9dbSNicholas Bellinger ASCQ_2AH_RESERVATIONS_RELEASED); 2169c66ac9dbSNicholas Bellinger } 2170c66ac9dbSNicholas Bellinger } 217151d9c41dSAndy Grover 2172c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 2173de103c93SChristoph Hellwig } 2174de103c93SChristoph Hellwig 2175459f213bSAndy Grover ret = core_scsi3_update_and_write_aptpl(dev, aptpl); 2176c66ac9dbSNicholas Bellinger 2177bc118fe4SAndy Grover out: 2178fc09149dSNicholas Bellinger if (pr_reg) 2179c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2180de103c93SChristoph Hellwig return ret; 2181c66ac9dbSNicholas Bellinger } 2182c66ac9dbSNicholas Bellinger 2183c66ac9dbSNicholas Bellinger unsigned char *core_scsi3_pr_dump_type(int type) 2184c66ac9dbSNicholas Bellinger { 2185c66ac9dbSNicholas Bellinger switch (type) { 2186c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE: 2187c66ac9dbSNicholas Bellinger return "Write Exclusive Access"; 2188c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS: 2189c66ac9dbSNicholas Bellinger return "Exclusive Access"; 2190c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: 2191c66ac9dbSNicholas Bellinger return "Write Exclusive Access, Registrants Only"; 2192c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: 2193c66ac9dbSNicholas Bellinger return "Exclusive Access, Registrants Only"; 2194c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: 2195c66ac9dbSNicholas Bellinger return "Write Exclusive Access, All Registrants"; 2196c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: 2197c66ac9dbSNicholas Bellinger return "Exclusive Access, All Registrants"; 2198c66ac9dbSNicholas Bellinger default: 2199c66ac9dbSNicholas Bellinger break; 2200c66ac9dbSNicholas Bellinger } 2201c66ac9dbSNicholas Bellinger 2202c66ac9dbSNicholas Bellinger return "Unknown SPC-3 PR Type"; 2203c66ac9dbSNicholas Bellinger } 2204c66ac9dbSNicholas Bellinger 2205de103c93SChristoph Hellwig static sense_reason_t 2206de103c93SChristoph Hellwig core_scsi3_pro_reserve(struct se_cmd *cmd, int type, int scope, u64 res_key) 2207c66ac9dbSNicholas Bellinger { 2208de103c93SChristoph Hellwig struct se_device *dev = cmd->se_dev; 2209e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 2210e3d6f909SAndy Grover struct se_lun *se_lun = cmd->se_lun; 2211c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_res_holder; 22120fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 2213c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 2214de103c93SChristoph Hellwig sense_reason_t ret; 2215c66ac9dbSNicholas Bellinger 2216c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 2217c66ac9dbSNicholas Bellinger 22186708bb27SAndy Grover if (!se_sess || !se_lun) { 22196708bb27SAndy Grover pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); 2220de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2221c66ac9dbSNicholas Bellinger } 2222c66ac9dbSNicholas Bellinger /* 2223c66ac9dbSNicholas Bellinger * Locate the existing *pr_reg via struct se_node_acl pointers 2224c66ac9dbSNicholas Bellinger */ 22255951146dSAndy Grover pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, 2226c66ac9dbSNicholas Bellinger se_sess); 22276708bb27SAndy Grover if (!pr_reg) { 22286708bb27SAndy Grover pr_err("SPC-3 PR: Unable to locate" 2229c66ac9dbSNicholas Bellinger " PR_REGISTERED *pr_reg for RESERVE\n"); 2230de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2231c66ac9dbSNicholas Bellinger } 2232c66ac9dbSNicholas Bellinger /* 2233c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2234c66ac9dbSNicholas Bellinger * 2235c66ac9dbSNicholas Bellinger * An application client creates a persistent reservation by issuing 2236c66ac9dbSNicholas Bellinger * a PERSISTENT RESERVE OUT command with RESERVE service action through 2237c66ac9dbSNicholas Bellinger * a registered I_T nexus with the following parameters: 2238c66ac9dbSNicholas Bellinger * a) RESERVATION KEY set to the value of the reservation key that is 2239c66ac9dbSNicholas Bellinger * registered with the logical unit for the I_T nexus; and 2240c66ac9dbSNicholas Bellinger */ 2241c66ac9dbSNicholas Bellinger if (res_key != pr_reg->pr_res_key) { 22426708bb27SAndy Grover pr_err("SPC-3 PR RESERVE: Received res_key: 0x%016Lx" 2243c66ac9dbSNicholas Bellinger " does not match existing SA REGISTER res_key:" 2244c66ac9dbSNicholas Bellinger " 0x%016Lx\n", res_key, pr_reg->pr_res_key); 2245de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 2246de103c93SChristoph Hellwig goto out_put_pr_reg; 2247c66ac9dbSNicholas Bellinger } 2248c66ac9dbSNicholas Bellinger /* 2249c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2250c66ac9dbSNicholas Bellinger * 2251c66ac9dbSNicholas Bellinger * From above: 2252c66ac9dbSNicholas Bellinger * b) TYPE field and SCOPE field set to the persistent reservation 2253c66ac9dbSNicholas Bellinger * being created. 2254c66ac9dbSNicholas Bellinger * 2255c66ac9dbSNicholas Bellinger * Only one persistent reservation is allowed at a time per logical unit 2256c66ac9dbSNicholas Bellinger * and that persistent reservation has a scope of LU_SCOPE. 2257c66ac9dbSNicholas Bellinger */ 2258c66ac9dbSNicholas Bellinger if (scope != PR_SCOPE_LU_SCOPE) { 22596708bb27SAndy Grover pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope); 2260de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 2261de103c93SChristoph Hellwig goto out_put_pr_reg; 2262c66ac9dbSNicholas Bellinger } 2263c66ac9dbSNicholas Bellinger /* 2264c66ac9dbSNicholas Bellinger * See if we have an existing PR reservation holder pointer at 2265c66ac9dbSNicholas Bellinger * struct se_device->dev_pr_res_holder in the form struct t10_pr_registration 2266c66ac9dbSNicholas Bellinger * *pr_res_holder. 2267c66ac9dbSNicholas Bellinger */ 2268c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 2269c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 2270ee1b1b9cSAndy Grover if (pr_res_holder) { 2271c66ac9dbSNicholas Bellinger /* 2272c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2273c66ac9dbSNicholas Bellinger * 2274c66ac9dbSNicholas Bellinger * If the device server receives a PERSISTENT RESERVE OUT 2275c66ac9dbSNicholas Bellinger * command from an I_T nexus other than a persistent reservation 2276c66ac9dbSNicholas Bellinger * holder (see 5.7.10) that attempts to create a persistent 2277c66ac9dbSNicholas Bellinger * reservation when a persistent reservation already exists for 2278c66ac9dbSNicholas Bellinger * the logical unit, then the command shall be completed with 2279c66ac9dbSNicholas Bellinger * RESERVATION CONFLICT status. 2280c66ac9dbSNicholas Bellinger */ 2281c66ac9dbSNicholas Bellinger if (pr_res_holder != pr_reg) { 2282c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 22836708bb27SAndy Grover pr_err("SPC-3 PR: Attempted RESERVE from" 2284c66ac9dbSNicholas Bellinger " [%s]: %s while reservation already held by" 2285c66ac9dbSNicholas Bellinger " [%s]: %s, returning RESERVATION_CONFLICT\n", 2286e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), 2287c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, 2288e3d6f909SAndy Grover pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 2289c66ac9dbSNicholas Bellinger pr_res_holder->pr_reg_nacl->initiatorname); 2290c66ac9dbSNicholas Bellinger 2291c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2292de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 2293de103c93SChristoph Hellwig goto out_put_pr_reg; 2294c66ac9dbSNicholas Bellinger } 2295c66ac9dbSNicholas Bellinger /* 2296c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2297c66ac9dbSNicholas Bellinger * 2298c66ac9dbSNicholas Bellinger * If a persistent reservation holder attempts to modify the 2299c66ac9dbSNicholas Bellinger * type or scope of an existing persistent reservation, the 2300c66ac9dbSNicholas Bellinger * command shall be completed with RESERVATION CONFLICT status. 2301c66ac9dbSNicholas Bellinger */ 2302c66ac9dbSNicholas Bellinger if ((pr_res_holder->pr_res_type != type) || 2303c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_scope != scope)) { 2304c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 23056708bb27SAndy Grover pr_err("SPC-3 PR: Attempted RESERVE from" 2306c66ac9dbSNicholas Bellinger " [%s]: %s trying to change TYPE and/or SCOPE," 2307c66ac9dbSNicholas Bellinger " while reservation already held by [%s]: %s," 2308c66ac9dbSNicholas Bellinger " returning RESERVATION_CONFLICT\n", 2309e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), 2310c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, 2311e3d6f909SAndy Grover pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 2312c66ac9dbSNicholas Bellinger pr_res_holder->pr_reg_nacl->initiatorname); 2313c66ac9dbSNicholas Bellinger 2314c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2315de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 2316de103c93SChristoph Hellwig goto out_put_pr_reg; 2317c66ac9dbSNicholas Bellinger } 2318c66ac9dbSNicholas Bellinger /* 2319c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2320c66ac9dbSNicholas Bellinger * 2321c66ac9dbSNicholas Bellinger * If the device server receives a PERSISTENT RESERVE OUT 2322c66ac9dbSNicholas Bellinger * command with RESERVE service action where the TYPE field and 2323c66ac9dbSNicholas Bellinger * the SCOPE field contain the same values as the existing type 2324c66ac9dbSNicholas Bellinger * and scope from a persistent reservation holder, it shall not 2325c66ac9dbSNicholas Bellinger * make any change to the existing persistent reservation and 2326c66ac9dbSNicholas Bellinger * shall completethe command with GOOD status. 2327c66ac9dbSNicholas Bellinger */ 2328c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2329de103c93SChristoph Hellwig ret = 0; 2330de103c93SChristoph Hellwig goto out_put_pr_reg; 2331c66ac9dbSNicholas Bellinger } 2332c66ac9dbSNicholas Bellinger /* 2333c66ac9dbSNicholas Bellinger * Otherwise, our *pr_reg becomes the PR reservation holder for said 2334c66ac9dbSNicholas Bellinger * TYPE/SCOPE. Also set the received scope and type in *pr_reg. 2335c66ac9dbSNicholas Bellinger */ 2336c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope = scope; 2337c66ac9dbSNicholas Bellinger pr_reg->pr_res_type = type; 2338c66ac9dbSNicholas Bellinger pr_reg->pr_res_holder = 1; 2339c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = pr_reg; 2340d2843c17SAndy Grover core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 2341c66ac9dbSNicholas Bellinger 23426708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: RESERVE created new" 2343c66ac9dbSNicholas Bellinger " reservation holder TYPE: %s ALL_TG_PT: %d\n", 2344e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), core_scsi3_pr_dump_type(type), 2345c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); 23466708bb27SAndy Grover pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n", 2347e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), 2348c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, 2349d2843c17SAndy Grover i_buf); 2350c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2351c66ac9dbSNicholas Bellinger 2352459f213bSAndy Grover if (pr_tmpl->pr_aptpl_active) 2353459f213bSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, true); 2354c66ac9dbSNicholas Bellinger 2355de103c93SChristoph Hellwig ret = 0; 2356de103c93SChristoph Hellwig out_put_pr_reg: 2357de103c93SChristoph Hellwig core_scsi3_put_pr_reg(pr_reg); 2358de103c93SChristoph Hellwig return ret; 2359de103c93SChristoph Hellwig } 2360de103c93SChristoph Hellwig 2361de103c93SChristoph Hellwig static sense_reason_t 2362de103c93SChristoph Hellwig core_scsi3_emulate_pro_reserve(struct se_cmd *cmd, int type, int scope, 2363c66ac9dbSNicholas Bellinger u64 res_key) 2364c66ac9dbSNicholas Bellinger { 2365c66ac9dbSNicholas Bellinger switch (type) { 2366c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE: 2367c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS: 2368c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: 2369c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: 2370c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: 2371c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: 2372de103c93SChristoph Hellwig return core_scsi3_pro_reserve(cmd, type, scope, res_key); 2373c66ac9dbSNicholas Bellinger default: 23746708bb27SAndy Grover pr_err("SPC-3 PR: Unknown Service Action RESERVE Type:" 2375c66ac9dbSNicholas Bellinger " 0x%02x\n", type); 2376de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 2377c66ac9dbSNicholas Bellinger } 2378c66ac9dbSNicholas Bellinger } 2379c66ac9dbSNicholas Bellinger 2380c66ac9dbSNicholas Bellinger /* 2381c66ac9dbSNicholas Bellinger * Called with struct se_device->dev_reservation_lock held. 2382c66ac9dbSNicholas Bellinger */ 2383c66ac9dbSNicholas Bellinger static void __core_scsi3_complete_pro_release( 2384c66ac9dbSNicholas Bellinger struct se_device *dev, 2385c66ac9dbSNicholas Bellinger struct se_node_acl *se_nacl, 2386c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 2387125d0119SHannes Reinecke int explicit) 2388c66ac9dbSNicholas Bellinger { 2389c66ac9dbSNicholas Bellinger struct target_core_fabric_ops *tfo = se_nacl->se_tpg->se_tpg_tfo; 2390c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 2391c66ac9dbSNicholas Bellinger 2392c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 2393d2843c17SAndy Grover core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 2394c66ac9dbSNicholas Bellinger /* 2395c66ac9dbSNicholas Bellinger * Go ahead and release the current PR reservation holder. 2396c66ac9dbSNicholas Bellinger */ 2397c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = NULL; 2398c66ac9dbSNicholas Bellinger 23996708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: %s RELEASE cleared" 2400c66ac9dbSNicholas Bellinger " reservation holder TYPE: %s ALL_TG_PT: %d\n", 2401125d0119SHannes Reinecke tfo->get_fabric_name(), (explicit) ? "explicit" : "implicit", 2402c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg->pr_res_type), 2403c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); 24046708bb27SAndy Grover pr_debug("SPC-3 PR [%s] RELEASE Node: %s%s\n", 2405c66ac9dbSNicholas Bellinger tfo->get_fabric_name(), se_nacl->initiatorname, 2406d2843c17SAndy Grover i_buf); 2407c66ac9dbSNicholas Bellinger /* 2408c66ac9dbSNicholas Bellinger * Clear TYPE and SCOPE for the next PROUT Service Action: RESERVE 2409c66ac9dbSNicholas Bellinger */ 2410c66ac9dbSNicholas Bellinger pr_reg->pr_res_holder = pr_reg->pr_res_type = pr_reg->pr_res_scope = 0; 2411c66ac9dbSNicholas Bellinger } 2412c66ac9dbSNicholas Bellinger 2413de103c93SChristoph Hellwig static sense_reason_t 2414de103c93SChristoph Hellwig core_scsi3_emulate_pro_release(struct se_cmd *cmd, int type, int scope, 2415c66ac9dbSNicholas Bellinger u64 res_key) 2416c66ac9dbSNicholas Bellinger { 2417c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 2418e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 2419e3d6f909SAndy Grover struct se_lun *se_lun = cmd->se_lun; 2420c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_res_holder; 24210fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 2422de103c93SChristoph Hellwig int all_reg = 0; 2423de103c93SChristoph Hellwig sense_reason_t ret = 0; 2424c66ac9dbSNicholas Bellinger 24256708bb27SAndy Grover if (!se_sess || !se_lun) { 24266708bb27SAndy Grover pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); 2427de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2428c66ac9dbSNicholas Bellinger } 2429c66ac9dbSNicholas Bellinger /* 2430c66ac9dbSNicholas Bellinger * Locate the existing *pr_reg via struct se_node_acl pointers 2431c66ac9dbSNicholas Bellinger */ 2432c66ac9dbSNicholas Bellinger pr_reg = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess); 24336708bb27SAndy Grover if (!pr_reg) { 24346708bb27SAndy Grover pr_err("SPC-3 PR: Unable to locate" 2435c66ac9dbSNicholas Bellinger " PR_REGISTERED *pr_reg for RELEASE\n"); 2436de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2437c66ac9dbSNicholas Bellinger } 2438c66ac9dbSNicholas Bellinger /* 2439c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.11.2 Releasing: 2440c66ac9dbSNicholas Bellinger * 2441c66ac9dbSNicholas Bellinger * If there is no persistent reservation or in response to a persistent 2442c66ac9dbSNicholas Bellinger * reservation release request from a registered I_T nexus that is not a 2443c66ac9dbSNicholas Bellinger * persistent reservation holder (see 5.7.10), the device server shall 2444c66ac9dbSNicholas Bellinger * do the following: 2445c66ac9dbSNicholas Bellinger * 2446c66ac9dbSNicholas Bellinger * a) Not release the persistent reservation, if any; 2447c66ac9dbSNicholas Bellinger * b) Not remove any registrations; and 2448c66ac9dbSNicholas Bellinger * c) Complete the command with GOOD status. 2449c66ac9dbSNicholas Bellinger */ 2450c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 2451c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 24526708bb27SAndy Grover if (!pr_res_holder) { 2453c66ac9dbSNicholas Bellinger /* 2454c66ac9dbSNicholas Bellinger * No persistent reservation, return GOOD status. 2455c66ac9dbSNicholas Bellinger */ 2456c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2457bb7a8c8eSNicholas Bellinger goto out_put_pr_reg; 2458c66ac9dbSNicholas Bellinger } 2459c66ac9dbSNicholas Bellinger if ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 2460c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) 2461c66ac9dbSNicholas Bellinger all_reg = 1; 2462c66ac9dbSNicholas Bellinger 2463c66ac9dbSNicholas Bellinger if ((all_reg == 0) && (pr_res_holder != pr_reg)) { 2464c66ac9dbSNicholas Bellinger /* 2465c66ac9dbSNicholas Bellinger * Non 'All Registrants' PR Type cases.. 2466c66ac9dbSNicholas Bellinger * Release request from a registered I_T nexus that is not a 2467c66ac9dbSNicholas Bellinger * persistent reservation holder. return GOOD status. 2468c66ac9dbSNicholas Bellinger */ 2469c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2470de103c93SChristoph Hellwig goto out_put_pr_reg; 2471c66ac9dbSNicholas Bellinger } 2472de103c93SChristoph Hellwig 2473c66ac9dbSNicholas Bellinger /* 2474c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.11.2 Releasing: 2475c66ac9dbSNicholas Bellinger * 2476c66ac9dbSNicholas Bellinger * Only the persistent reservation holder (see 5.7.10) is allowed to 2477c66ac9dbSNicholas Bellinger * release a persistent reservation. 2478c66ac9dbSNicholas Bellinger * 2479c66ac9dbSNicholas Bellinger * An application client releases the persistent reservation by issuing 2480c66ac9dbSNicholas Bellinger * a PERSISTENT RESERVE OUT command with RELEASE service action through 2481c66ac9dbSNicholas Bellinger * an I_T nexus that is a persistent reservation holder with the 2482c66ac9dbSNicholas Bellinger * following parameters: 2483c66ac9dbSNicholas Bellinger * 2484c66ac9dbSNicholas Bellinger * a) RESERVATION KEY field set to the value of the reservation key 2485c66ac9dbSNicholas Bellinger * that is registered with the logical unit for the I_T nexus; 2486c66ac9dbSNicholas Bellinger */ 2487c66ac9dbSNicholas Bellinger if (res_key != pr_reg->pr_res_key) { 24886708bb27SAndy Grover pr_err("SPC-3 PR RELEASE: Received res_key: 0x%016Lx" 2489c66ac9dbSNicholas Bellinger " does not match existing SA REGISTER res_key:" 2490c66ac9dbSNicholas Bellinger " 0x%016Lx\n", res_key, pr_reg->pr_res_key); 2491c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2492de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 2493de103c93SChristoph Hellwig goto out_put_pr_reg; 2494c66ac9dbSNicholas Bellinger } 2495c66ac9dbSNicholas Bellinger /* 2496c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.11.2 Releasing and above: 2497c66ac9dbSNicholas Bellinger * 2498c66ac9dbSNicholas Bellinger * b) TYPE field and SCOPE field set to match the persistent 2499c66ac9dbSNicholas Bellinger * reservation being released. 2500c66ac9dbSNicholas Bellinger */ 2501c66ac9dbSNicholas Bellinger if ((pr_res_holder->pr_res_type != type) || 2502c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_scope != scope)) { 2503c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 25046708bb27SAndy Grover pr_err("SPC-3 PR RELEASE: Attempted to release" 2505c66ac9dbSNicholas Bellinger " reservation from [%s]: %s with different TYPE " 2506c66ac9dbSNicholas Bellinger "and/or SCOPE while reservation already held by" 2507c66ac9dbSNicholas Bellinger " [%s]: %s, returning RESERVATION_CONFLICT\n", 2508e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), 2509c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, 2510e3d6f909SAndy Grover pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 2511c66ac9dbSNicholas Bellinger pr_res_holder->pr_reg_nacl->initiatorname); 2512c66ac9dbSNicholas Bellinger 2513c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2514de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 2515de103c93SChristoph Hellwig goto out_put_pr_reg; 2516c66ac9dbSNicholas Bellinger } 2517c66ac9dbSNicholas Bellinger /* 2518c66ac9dbSNicholas Bellinger * In response to a persistent reservation release request from the 2519c66ac9dbSNicholas Bellinger * persistent reservation holder the device server shall perform a 2520c66ac9dbSNicholas Bellinger * release by doing the following as an uninterrupted series of actions: 2521c66ac9dbSNicholas Bellinger * a) Release the persistent reservation; 2522c66ac9dbSNicholas Bellinger * b) Not remove any registration(s); 2523c66ac9dbSNicholas Bellinger * c) If the released persistent reservation is a registrants only type 2524c66ac9dbSNicholas Bellinger * or all registrants type persistent reservation, 2525c66ac9dbSNicholas Bellinger * the device server shall establish a unit attention condition for 2526c66ac9dbSNicholas Bellinger * the initiator port associated with every regis- 2527c66ac9dbSNicholas Bellinger * tered I_T nexus other than I_T nexus on which the PERSISTENT 2528c66ac9dbSNicholas Bellinger * RESERVE OUT command with RELEASE service action was received, 2529c66ac9dbSNicholas Bellinger * with the additional sense code set to RESERVATIONS RELEASED; and 2530c66ac9dbSNicholas Bellinger * d) If the persistent reservation is of any other type, the device 2531c66ac9dbSNicholas Bellinger * server shall not establish a unit attention condition. 2532c66ac9dbSNicholas Bellinger */ 2533c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, se_sess->se_node_acl, 2534c66ac9dbSNicholas Bellinger pr_reg, 1); 2535c66ac9dbSNicholas Bellinger 2536c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2537c66ac9dbSNicholas Bellinger 2538c66ac9dbSNicholas Bellinger if ((type != PR_TYPE_WRITE_EXCLUSIVE_REGONLY) && 2539c66ac9dbSNicholas Bellinger (type != PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) && 2540c66ac9dbSNicholas Bellinger (type != PR_TYPE_WRITE_EXCLUSIVE_ALLREG) && 2541c66ac9dbSNicholas Bellinger (type != PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { 2542c66ac9dbSNicholas Bellinger /* 2543c66ac9dbSNicholas Bellinger * If no UNIT ATTENTION conditions will be established for 2544c66ac9dbSNicholas Bellinger * PR_TYPE_WRITE_EXCLUSIVE or PR_TYPE_EXCLUSIVE_ACCESS 2545c66ac9dbSNicholas Bellinger * go ahead and check for APTPL=1 update+write below 2546c66ac9dbSNicholas Bellinger */ 2547c66ac9dbSNicholas Bellinger goto write_aptpl; 2548c66ac9dbSNicholas Bellinger } 2549c66ac9dbSNicholas Bellinger 2550c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 2551c66ac9dbSNicholas Bellinger list_for_each_entry(pr_reg_p, &pr_tmpl->registration_list, 2552c66ac9dbSNicholas Bellinger pr_reg_list) { 2553c66ac9dbSNicholas Bellinger /* 2554c66ac9dbSNicholas Bellinger * Do not establish a UNIT ATTENTION condition 2555c66ac9dbSNicholas Bellinger * for the calling I_T Nexus 2556c66ac9dbSNicholas Bellinger */ 2557c66ac9dbSNicholas Bellinger if (pr_reg_p == pr_reg) 2558c66ac9dbSNicholas Bellinger continue; 2559c66ac9dbSNicholas Bellinger 2560c66ac9dbSNicholas Bellinger core_scsi3_ua_allocate(pr_reg_p->pr_reg_nacl, 2561c66ac9dbSNicholas Bellinger pr_reg_p->pr_res_mapped_lun, 2562c66ac9dbSNicholas Bellinger 0x2A, ASCQ_2AH_RESERVATIONS_RELEASED); 2563c66ac9dbSNicholas Bellinger } 2564c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 2565c66ac9dbSNicholas Bellinger 2566c66ac9dbSNicholas Bellinger write_aptpl: 2567459f213bSAndy Grover if (pr_tmpl->pr_aptpl_active) 2568459f213bSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, true); 2569459f213bSAndy Grover 2570de103c93SChristoph Hellwig out_put_pr_reg: 2571c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2572de103c93SChristoph Hellwig return ret; 2573c66ac9dbSNicholas Bellinger } 2574c66ac9dbSNicholas Bellinger 2575de103c93SChristoph Hellwig static sense_reason_t 2576de103c93SChristoph Hellwig core_scsi3_emulate_pro_clear(struct se_cmd *cmd, u64 res_key) 2577c66ac9dbSNicholas Bellinger { 2578c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 2579c66ac9dbSNicholas Bellinger struct se_node_acl *pr_reg_nacl; 2580e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 25810fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 2582c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder; 2583c66ac9dbSNicholas Bellinger u32 pr_res_mapped_lun = 0; 2584c66ac9dbSNicholas Bellinger int calling_it_nexus = 0; 2585c66ac9dbSNicholas Bellinger /* 2586c66ac9dbSNicholas Bellinger * Locate the existing *pr_reg via struct se_node_acl pointers 2587c66ac9dbSNicholas Bellinger */ 25885951146dSAndy Grover pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, 2589c66ac9dbSNicholas Bellinger se_sess->se_node_acl, se_sess); 25906708bb27SAndy Grover if (!pr_reg_n) { 25916708bb27SAndy Grover pr_err("SPC-3 PR: Unable to locate" 2592c66ac9dbSNicholas Bellinger " PR_REGISTERED *pr_reg for CLEAR\n"); 2593de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2594c66ac9dbSNicholas Bellinger } 2595c66ac9dbSNicholas Bellinger /* 2596c66ac9dbSNicholas Bellinger * From spc4r17 section 5.7.11.6, Clearing: 2597c66ac9dbSNicholas Bellinger * 2598c66ac9dbSNicholas Bellinger * Any application client may release the persistent reservation and 2599c66ac9dbSNicholas Bellinger * remove all registrations from a device server by issuing a 2600c66ac9dbSNicholas Bellinger * PERSISTENT RESERVE OUT command with CLEAR service action through a 2601c66ac9dbSNicholas Bellinger * registered I_T nexus with the following parameter: 2602c66ac9dbSNicholas Bellinger * 2603c66ac9dbSNicholas Bellinger * a) RESERVATION KEY field set to the value of the reservation key 2604c66ac9dbSNicholas Bellinger * that is registered with the logical unit for the I_T nexus. 2605c66ac9dbSNicholas Bellinger */ 2606c66ac9dbSNicholas Bellinger if (res_key != pr_reg_n->pr_res_key) { 26076708bb27SAndy Grover pr_err("SPC-3 PR REGISTER: Received" 2608c66ac9dbSNicholas Bellinger " res_key: 0x%016Lx does not match" 2609c66ac9dbSNicholas Bellinger " existing SA REGISTER res_key:" 2610c66ac9dbSNicholas Bellinger " 0x%016Lx\n", res_key, pr_reg_n->pr_res_key); 2611c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 2612de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 2613c66ac9dbSNicholas Bellinger } 2614c66ac9dbSNicholas Bellinger /* 2615c66ac9dbSNicholas Bellinger * a) Release the persistent reservation, if any; 2616c66ac9dbSNicholas Bellinger */ 2617c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 2618c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 2619c66ac9dbSNicholas Bellinger if (pr_res_holder) { 2620c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 2621c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, pr_res_nacl, 2622c66ac9dbSNicholas Bellinger pr_res_holder, 0); 2623c66ac9dbSNicholas Bellinger } 2624c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2625c66ac9dbSNicholas Bellinger /* 2626c66ac9dbSNicholas Bellinger * b) Remove all registration(s) (see spc4r17 5.7.7); 2627c66ac9dbSNicholas Bellinger */ 2628c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 2629c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 2630c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 2631c66ac9dbSNicholas Bellinger 2632c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 2633c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 2634c66ac9dbSNicholas Bellinger pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; 2635c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, NULL, 2636c66ac9dbSNicholas Bellinger calling_it_nexus); 2637c66ac9dbSNicholas Bellinger /* 2638c66ac9dbSNicholas Bellinger * e) Establish a unit attention condition for the initiator 2639c66ac9dbSNicholas Bellinger * port associated with every registered I_T nexus other 2640c66ac9dbSNicholas Bellinger * than the I_T nexus on which the PERSISTENT RESERVE OUT 2641c66ac9dbSNicholas Bellinger * command with CLEAR service action was received, with the 2642c66ac9dbSNicholas Bellinger * additional sense code set to RESERVATIONS PREEMPTED. 2643c66ac9dbSNicholas Bellinger */ 26446708bb27SAndy Grover if (!calling_it_nexus) 2645c66ac9dbSNicholas Bellinger core_scsi3_ua_allocate(pr_reg_nacl, pr_res_mapped_lun, 2646c66ac9dbSNicholas Bellinger 0x2A, ASCQ_2AH_RESERVATIONS_PREEMPTED); 2647c66ac9dbSNicholas Bellinger } 2648c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 2649c66ac9dbSNicholas Bellinger 26506708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: CLEAR complete\n", 2651e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name()); 2652c66ac9dbSNicholas Bellinger 2653459f213bSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, false); 2654c66ac9dbSNicholas Bellinger 2655c66ac9dbSNicholas Bellinger core_scsi3_pr_generation(dev); 2656c66ac9dbSNicholas Bellinger return 0; 2657c66ac9dbSNicholas Bellinger } 2658c66ac9dbSNicholas Bellinger 2659c66ac9dbSNicholas Bellinger /* 2660c66ac9dbSNicholas Bellinger * Called with struct se_device->dev_reservation_lock held. 2661c66ac9dbSNicholas Bellinger */ 2662c66ac9dbSNicholas Bellinger static void __core_scsi3_complete_pro_preempt( 2663c66ac9dbSNicholas Bellinger struct se_device *dev, 2664c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 2665c66ac9dbSNicholas Bellinger struct list_head *preempt_and_abort_list, 2666c66ac9dbSNicholas Bellinger int type, 2667c66ac9dbSNicholas Bellinger int scope, 266833ce6a87SAndy Grover enum preempt_type preempt_type) 2669c66ac9dbSNicholas Bellinger { 2670c66ac9dbSNicholas Bellinger struct se_node_acl *nacl = pr_reg->pr_reg_nacl; 2671c66ac9dbSNicholas Bellinger struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; 2672c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 2673c66ac9dbSNicholas Bellinger 2674c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 2675d2843c17SAndy Grover core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 2676c66ac9dbSNicholas Bellinger /* 2677125d0119SHannes Reinecke * Do an implicit RELEASE of the existing reservation. 2678c66ac9dbSNicholas Bellinger */ 2679c66ac9dbSNicholas Bellinger if (dev->dev_pr_res_holder) 2680c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, nacl, 2681c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder, 0); 2682c66ac9dbSNicholas Bellinger 2683c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = pr_reg; 2684c66ac9dbSNicholas Bellinger pr_reg->pr_res_holder = 1; 2685c66ac9dbSNicholas Bellinger pr_reg->pr_res_type = type; 2686c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope = scope; 2687c66ac9dbSNicholas Bellinger 26886708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: PREEMPT%s created new" 2689c66ac9dbSNicholas Bellinger " reservation holder TYPE: %s ALL_TG_PT: %d\n", 269033ce6a87SAndy Grover tfo->get_fabric_name(), (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : "", 2691c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(type), 2692c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); 26936708bb27SAndy Grover pr_debug("SPC-3 PR [%s] PREEMPT%s from Node: %s%s\n", 269433ce6a87SAndy Grover tfo->get_fabric_name(), (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : "", 2695d2843c17SAndy Grover nacl->initiatorname, i_buf); 2696c66ac9dbSNicholas Bellinger /* 2697c66ac9dbSNicholas Bellinger * For PREEMPT_AND_ABORT, add the preempting reservation's 2698c66ac9dbSNicholas Bellinger * struct t10_pr_registration to the list that will be compared 2699c66ac9dbSNicholas Bellinger * against received CDBs.. 2700c66ac9dbSNicholas Bellinger */ 2701c66ac9dbSNicholas Bellinger if (preempt_and_abort_list) 2702c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg->pr_reg_abort_list, 2703c66ac9dbSNicholas Bellinger preempt_and_abort_list); 2704c66ac9dbSNicholas Bellinger } 2705c66ac9dbSNicholas Bellinger 2706c66ac9dbSNicholas Bellinger static void core_scsi3_release_preempt_and_abort( 2707c66ac9dbSNicholas Bellinger struct list_head *preempt_and_abort_list, 2708c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg_holder) 2709c66ac9dbSNicholas Bellinger { 2710c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp; 2711c66ac9dbSNicholas Bellinger 2712c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, preempt_and_abort_list, 2713c66ac9dbSNicholas Bellinger pr_reg_abort_list) { 2714c66ac9dbSNicholas Bellinger 2715c66ac9dbSNicholas Bellinger list_del(&pr_reg->pr_reg_abort_list); 2716c66ac9dbSNicholas Bellinger if (pr_reg_holder == pr_reg) 2717c66ac9dbSNicholas Bellinger continue; 2718c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_holder) { 27196708bb27SAndy Grover pr_warn("pr_reg->pr_res_holder still set\n"); 2720c66ac9dbSNicholas Bellinger continue; 2721c66ac9dbSNicholas Bellinger } 2722c66ac9dbSNicholas Bellinger 2723c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve = NULL; 2724c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = NULL; 2725c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 2726c66ac9dbSNicholas Bellinger } 2727c66ac9dbSNicholas Bellinger } 2728c66ac9dbSNicholas Bellinger 2729de103c93SChristoph Hellwig static sense_reason_t 2730de103c93SChristoph Hellwig core_scsi3_pro_preempt(struct se_cmd *cmd, int type, int scope, u64 res_key, 273133ce6a87SAndy Grover u64 sa_res_key, enum preempt_type preempt_type) 2732c66ac9dbSNicholas Bellinger { 27335951146dSAndy Grover struct se_device *dev = cmd->se_dev; 2734c66ac9dbSNicholas Bellinger struct se_node_acl *pr_reg_nacl; 2735e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 2736d0f474e5SRoland Dreier LIST_HEAD(preempt_and_abort_list); 2737c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder; 27380fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 2739c66ac9dbSNicholas Bellinger u32 pr_res_mapped_lun = 0; 2740c66ac9dbSNicholas Bellinger int all_reg = 0, calling_it_nexus = 0, released_regs = 0; 2741de103c93SChristoph Hellwig int prh_type = 0, prh_scope = 0; 2742c66ac9dbSNicholas Bellinger 2743de103c93SChristoph Hellwig if (!se_sess) 2744de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2745c66ac9dbSNicholas Bellinger 27465951146dSAndy Grover pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, 2747c66ac9dbSNicholas Bellinger se_sess); 27486708bb27SAndy Grover if (!pr_reg_n) { 27496708bb27SAndy Grover pr_err("SPC-3 PR: Unable to locate" 2750c66ac9dbSNicholas Bellinger " PR_REGISTERED *pr_reg for PREEMPT%s\n", 275133ce6a87SAndy Grover (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : ""); 2752de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 2753c66ac9dbSNicholas Bellinger } 2754c66ac9dbSNicholas Bellinger if (pr_reg_n->pr_res_key != res_key) { 2755c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 2756de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 2757c66ac9dbSNicholas Bellinger } 2758c66ac9dbSNicholas Bellinger if (scope != PR_SCOPE_LU_SCOPE) { 27596708bb27SAndy Grover pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope); 2760c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 2761de103c93SChristoph Hellwig return TCM_INVALID_PARAMETER_LIST; 2762c66ac9dbSNicholas Bellinger } 2763c66ac9dbSNicholas Bellinger 2764c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 2765c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 2766c66ac9dbSNicholas Bellinger if (pr_res_holder && 2767c66ac9dbSNicholas Bellinger ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 2768c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG))) 2769c66ac9dbSNicholas Bellinger all_reg = 1; 2770c66ac9dbSNicholas Bellinger 27716708bb27SAndy Grover if (!all_reg && !sa_res_key) { 2772c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2773c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 2774de103c93SChristoph Hellwig return TCM_INVALID_PARAMETER_LIST; 2775c66ac9dbSNicholas Bellinger } 2776c66ac9dbSNicholas Bellinger /* 2777c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.11.4.4 Removing Registrations: 2778c66ac9dbSNicholas Bellinger * 2779c66ac9dbSNicholas Bellinger * If the SERVICE ACTION RESERVATION KEY field does not identify a 2780c66ac9dbSNicholas Bellinger * persistent reservation holder or there is no persistent reservation 2781c66ac9dbSNicholas Bellinger * holder (i.e., there is no persistent reservation), then the device 2782c66ac9dbSNicholas Bellinger * server shall perform a preempt by doing the following in an 2783c66ac9dbSNicholas Bellinger * uninterrupted series of actions. (See below..) 2784c66ac9dbSNicholas Bellinger */ 27856708bb27SAndy Grover if (!pr_res_holder || (pr_res_holder->pr_res_key != sa_res_key)) { 2786c66ac9dbSNicholas Bellinger /* 2787c66ac9dbSNicholas Bellinger * No existing or SA Reservation Key matching reservations.. 2788c66ac9dbSNicholas Bellinger * 2789c66ac9dbSNicholas Bellinger * PROUT SA PREEMPT with All Registrant type reservations are 2790c66ac9dbSNicholas Bellinger * allowed to be processed without a matching SA Reservation Key 2791c66ac9dbSNicholas Bellinger */ 2792c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 2793c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 2794c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 2795c66ac9dbSNicholas Bellinger /* 2796c66ac9dbSNicholas Bellinger * Removing of registrations in non all registrants 2797c66ac9dbSNicholas Bellinger * type reservations without a matching SA reservation 2798c66ac9dbSNicholas Bellinger * key. 2799c66ac9dbSNicholas Bellinger * 2800c66ac9dbSNicholas Bellinger * a) Remove the registrations for all I_T nexuses 2801c66ac9dbSNicholas Bellinger * specified by the SERVICE ACTION RESERVATION KEY 2802c66ac9dbSNicholas Bellinger * field; 2803c66ac9dbSNicholas Bellinger * b) Ignore the contents of the SCOPE and TYPE fields; 2804c66ac9dbSNicholas Bellinger * c) Process tasks as defined in 5.7.1; and 2805c66ac9dbSNicholas Bellinger * d) Establish a unit attention condition for the 2806c66ac9dbSNicholas Bellinger * initiator port associated with every I_T nexus 2807c66ac9dbSNicholas Bellinger * that lost its registration other than the I_T 2808c66ac9dbSNicholas Bellinger * nexus on which the PERSISTENT RESERVE OUT command 2809c66ac9dbSNicholas Bellinger * was received, with the additional sense code set 2810c66ac9dbSNicholas Bellinger * to REGISTRATIONS PREEMPTED. 2811c66ac9dbSNicholas Bellinger */ 28126708bb27SAndy Grover if (!all_reg) { 2813c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_key != sa_res_key) 2814c66ac9dbSNicholas Bellinger continue; 2815c66ac9dbSNicholas Bellinger 2816c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 2817c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 2818c66ac9dbSNicholas Bellinger pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; 2819c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, 282033ce6a87SAndy Grover (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : 2821c66ac9dbSNicholas Bellinger NULL, calling_it_nexus); 2822c66ac9dbSNicholas Bellinger released_regs++; 2823c66ac9dbSNicholas Bellinger } else { 2824c66ac9dbSNicholas Bellinger /* 2825c66ac9dbSNicholas Bellinger * Case for any existing all registrants type 2826c66ac9dbSNicholas Bellinger * reservation, follow logic in spc4r17 section 2827c66ac9dbSNicholas Bellinger * 5.7.11.4 Preempting, Table 52 and Figure 7. 2828c66ac9dbSNicholas Bellinger * 2829c66ac9dbSNicholas Bellinger * For a ZERO SA Reservation key, release 2830125d0119SHannes Reinecke * all other registrations and do an implicit 2831c66ac9dbSNicholas Bellinger * release of active persistent reservation. 2832c66ac9dbSNicholas Bellinger * 2833c66ac9dbSNicholas Bellinger * For a non-ZERO SA Reservation key, only 2834c66ac9dbSNicholas Bellinger * release the matching reservation key from 2835c66ac9dbSNicholas Bellinger * registrations. 2836c66ac9dbSNicholas Bellinger */ 2837c66ac9dbSNicholas Bellinger if ((sa_res_key) && 2838c66ac9dbSNicholas Bellinger (pr_reg->pr_res_key != sa_res_key)) 2839c66ac9dbSNicholas Bellinger continue; 2840c66ac9dbSNicholas Bellinger 2841c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 2842c66ac9dbSNicholas Bellinger if (calling_it_nexus) 2843c66ac9dbSNicholas Bellinger continue; 2844c66ac9dbSNicholas Bellinger 2845c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 2846c66ac9dbSNicholas Bellinger pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; 2847c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, 284833ce6a87SAndy Grover (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : 2849c66ac9dbSNicholas Bellinger NULL, 0); 2850c66ac9dbSNicholas Bellinger released_regs++; 2851c66ac9dbSNicholas Bellinger } 28526708bb27SAndy Grover if (!calling_it_nexus) 2853c66ac9dbSNicholas Bellinger core_scsi3_ua_allocate(pr_reg_nacl, 2854c66ac9dbSNicholas Bellinger pr_res_mapped_lun, 0x2A, 28559e08e34eSMarco Sanvido ASCQ_2AH_REGISTRATIONS_PREEMPTED); 2856c66ac9dbSNicholas Bellinger } 2857c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 2858c66ac9dbSNicholas Bellinger /* 2859c66ac9dbSNicholas Bellinger * If a PERSISTENT RESERVE OUT with a PREEMPT service action or 2860c66ac9dbSNicholas Bellinger * a PREEMPT AND ABORT service action sets the SERVICE ACTION 2861c66ac9dbSNicholas Bellinger * RESERVATION KEY field to a value that does not match any 2862c66ac9dbSNicholas Bellinger * registered reservation key, then the device server shall 2863c66ac9dbSNicholas Bellinger * complete the command with RESERVATION CONFLICT status. 2864c66ac9dbSNicholas Bellinger */ 28656708bb27SAndy Grover if (!released_regs) { 2866c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2867c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 2868de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 2869c66ac9dbSNicholas Bellinger } 2870c66ac9dbSNicholas Bellinger /* 2871c66ac9dbSNicholas Bellinger * For an existing all registrants type reservation 2872c66ac9dbSNicholas Bellinger * with a zero SA rservation key, preempt the existing 2873c66ac9dbSNicholas Bellinger * reservation with the new PR type and scope. 2874c66ac9dbSNicholas Bellinger */ 2875c66ac9dbSNicholas Bellinger if (pr_res_holder && all_reg && !(sa_res_key)) { 2876c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_preempt(dev, pr_reg_n, 287733ce6a87SAndy Grover (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : NULL, 287833ce6a87SAndy Grover type, scope, preempt_type); 2879c66ac9dbSNicholas Bellinger 288033ce6a87SAndy Grover if (preempt_type == PREEMPT_AND_ABORT) 2881c66ac9dbSNicholas Bellinger core_scsi3_release_preempt_and_abort( 2882c66ac9dbSNicholas Bellinger &preempt_and_abort_list, pr_reg_n); 2883c66ac9dbSNicholas Bellinger } 2884c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2885c66ac9dbSNicholas Bellinger 2886459f213bSAndy Grover if (pr_tmpl->pr_aptpl_active) 2887459f213bSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, true); 2888c66ac9dbSNicholas Bellinger 2889c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 28905951146dSAndy Grover core_scsi3_pr_generation(cmd->se_dev); 2891c66ac9dbSNicholas Bellinger return 0; 2892c66ac9dbSNicholas Bellinger } 2893c66ac9dbSNicholas Bellinger /* 2894c66ac9dbSNicholas Bellinger * The PREEMPTing SA reservation key matches that of the 2895c66ac9dbSNicholas Bellinger * existing persistent reservation, first, we check if 2896c66ac9dbSNicholas Bellinger * we are preempting our own reservation. 2897c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.11.4.3 Preempting 2898c66ac9dbSNicholas Bellinger * persistent reservations and registration handling 2899c66ac9dbSNicholas Bellinger * 2900c66ac9dbSNicholas Bellinger * If an all registrants persistent reservation is not 2901c66ac9dbSNicholas Bellinger * present, it is not an error for the persistent 2902c66ac9dbSNicholas Bellinger * reservation holder to preempt itself (i.e., a 2903c66ac9dbSNicholas Bellinger * PERSISTENT RESERVE OUT with a PREEMPT service action 2904c66ac9dbSNicholas Bellinger * or a PREEMPT AND ABORT service action with the 2905c66ac9dbSNicholas Bellinger * SERVICE ACTION RESERVATION KEY value equal to the 2906c66ac9dbSNicholas Bellinger * persistent reservation holder's reservation key that 2907c66ac9dbSNicholas Bellinger * is received from the persistent reservation holder). 2908c66ac9dbSNicholas Bellinger * In that case, the device server shall establish the 2909c66ac9dbSNicholas Bellinger * new persistent reservation and maintain the 2910c66ac9dbSNicholas Bellinger * registration. 2911c66ac9dbSNicholas Bellinger */ 2912c66ac9dbSNicholas Bellinger prh_type = pr_res_holder->pr_res_type; 2913c66ac9dbSNicholas Bellinger prh_scope = pr_res_holder->pr_res_scope; 2914c66ac9dbSNicholas Bellinger /* 2915c66ac9dbSNicholas Bellinger * If the SERVICE ACTION RESERVATION KEY field identifies a 2916c66ac9dbSNicholas Bellinger * persistent reservation holder (see 5.7.10), the device 2917c66ac9dbSNicholas Bellinger * server shall perform a preempt by doing the following as 2918c66ac9dbSNicholas Bellinger * an uninterrupted series of actions: 2919c66ac9dbSNicholas Bellinger * 2920c66ac9dbSNicholas Bellinger * a) Release the persistent reservation for the holder 2921c66ac9dbSNicholas Bellinger * identified by the SERVICE ACTION RESERVATION KEY field; 2922c66ac9dbSNicholas Bellinger */ 2923c66ac9dbSNicholas Bellinger if (pr_reg_n != pr_res_holder) 2924c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, 2925c66ac9dbSNicholas Bellinger pr_res_holder->pr_reg_nacl, 2926c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder, 0); 2927c66ac9dbSNicholas Bellinger /* 2928c66ac9dbSNicholas Bellinger * b) Remove the registrations for all I_T nexuses identified 2929c66ac9dbSNicholas Bellinger * by the SERVICE ACTION RESERVATION KEY field, except the 2930c66ac9dbSNicholas Bellinger * I_T nexus that is being used for the PERSISTENT RESERVE 2931c66ac9dbSNicholas Bellinger * OUT command. If an all registrants persistent reservation 2932c66ac9dbSNicholas Bellinger * is present and the SERVICE ACTION RESERVATION KEY field 2933c66ac9dbSNicholas Bellinger * is set to zero, then all registrations shall be removed 2934c66ac9dbSNicholas Bellinger * except for that of the I_T nexus that is being used for 2935c66ac9dbSNicholas Bellinger * the PERSISTENT RESERVE OUT command; 2936c66ac9dbSNicholas Bellinger */ 2937c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 2938c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 2939c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 2940c66ac9dbSNicholas Bellinger 2941c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 2942c66ac9dbSNicholas Bellinger if (calling_it_nexus) 2943c66ac9dbSNicholas Bellinger continue; 2944c66ac9dbSNicholas Bellinger 2945c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_key != sa_res_key) 2946c66ac9dbSNicholas Bellinger continue; 2947c66ac9dbSNicholas Bellinger 2948c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 2949c66ac9dbSNicholas Bellinger pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; 2950c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, 295133ce6a87SAndy Grover (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : NULL, 2952c66ac9dbSNicholas Bellinger calling_it_nexus); 2953c66ac9dbSNicholas Bellinger /* 2954c66ac9dbSNicholas Bellinger * e) Establish a unit attention condition for the initiator 2955c66ac9dbSNicholas Bellinger * port associated with every I_T nexus that lost its 2956c66ac9dbSNicholas Bellinger * persistent reservation and/or registration, with the 2957c66ac9dbSNicholas Bellinger * additional sense code set to REGISTRATIONS PREEMPTED; 2958c66ac9dbSNicholas Bellinger */ 2959c66ac9dbSNicholas Bellinger core_scsi3_ua_allocate(pr_reg_nacl, pr_res_mapped_lun, 0x2A, 29609e08e34eSMarco Sanvido ASCQ_2AH_REGISTRATIONS_PREEMPTED); 2961c66ac9dbSNicholas Bellinger } 2962c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 2963c66ac9dbSNicholas Bellinger /* 2964c66ac9dbSNicholas Bellinger * c) Establish a persistent reservation for the preempting 2965c66ac9dbSNicholas Bellinger * I_T nexus using the contents of the SCOPE and TYPE fields; 2966c66ac9dbSNicholas Bellinger */ 2967c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_preempt(dev, pr_reg_n, 296833ce6a87SAndy Grover (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : NULL, 296933ce6a87SAndy Grover type, scope, preempt_type); 2970c66ac9dbSNicholas Bellinger /* 2971c66ac9dbSNicholas Bellinger * d) Process tasks as defined in 5.7.1; 2972c66ac9dbSNicholas Bellinger * e) See above.. 2973c66ac9dbSNicholas Bellinger * f) If the type or scope has changed, then for every I_T nexus 2974c66ac9dbSNicholas Bellinger * whose reservation key was not removed, except for the I_T 2975c66ac9dbSNicholas Bellinger * nexus on which the PERSISTENT RESERVE OUT command was 2976c66ac9dbSNicholas Bellinger * received, the device server shall establish a unit 2977c66ac9dbSNicholas Bellinger * attention condition for the initiator port associated with 2978c66ac9dbSNicholas Bellinger * that I_T nexus, with the additional sense code set to 2979c66ac9dbSNicholas Bellinger * RESERVATIONS RELEASED. If the type or scope have not 2980c66ac9dbSNicholas Bellinger * changed, then no unit attention condition(s) shall be 2981c66ac9dbSNicholas Bellinger * established for this reason. 2982c66ac9dbSNicholas Bellinger */ 2983c66ac9dbSNicholas Bellinger if ((prh_type != type) || (prh_scope != scope)) { 2984c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 2985c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 2986c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 2987c66ac9dbSNicholas Bellinger 2988c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 2989c66ac9dbSNicholas Bellinger if (calling_it_nexus) 2990c66ac9dbSNicholas Bellinger continue; 2991c66ac9dbSNicholas Bellinger 2992c66ac9dbSNicholas Bellinger core_scsi3_ua_allocate(pr_reg->pr_reg_nacl, 2993c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun, 0x2A, 2994c66ac9dbSNicholas Bellinger ASCQ_2AH_RESERVATIONS_RELEASED); 2995c66ac9dbSNicholas Bellinger } 2996c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 2997c66ac9dbSNicholas Bellinger } 2998c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2999c66ac9dbSNicholas Bellinger /* 3000c66ac9dbSNicholas Bellinger * Call LUN_RESET logic upon list of struct t10_pr_registration, 3001c66ac9dbSNicholas Bellinger * All received CDBs for the matching existing reservation and 3002c66ac9dbSNicholas Bellinger * registrations undergo ABORT_TASK logic. 3003c66ac9dbSNicholas Bellinger * 3004c66ac9dbSNicholas Bellinger * From there, core_scsi3_release_preempt_and_abort() will 3005c66ac9dbSNicholas Bellinger * release every registration in the list (which have already 3006c66ac9dbSNicholas Bellinger * been removed from the primary pr_reg list), except the 3007c66ac9dbSNicholas Bellinger * new persistent reservation holder, the calling Initiator Port. 3008c66ac9dbSNicholas Bellinger */ 300933ce6a87SAndy Grover if (preempt_type == PREEMPT_AND_ABORT) { 3010c66ac9dbSNicholas Bellinger core_tmr_lun_reset(dev, NULL, &preempt_and_abort_list, cmd); 3011c66ac9dbSNicholas Bellinger core_scsi3_release_preempt_and_abort(&preempt_and_abort_list, 3012c66ac9dbSNicholas Bellinger pr_reg_n); 3013c66ac9dbSNicholas Bellinger } 3014c66ac9dbSNicholas Bellinger 3015459f213bSAndy Grover if (pr_tmpl->pr_aptpl_active) 3016459f213bSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, true); 3017c66ac9dbSNicholas Bellinger 3018c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 30195951146dSAndy Grover core_scsi3_pr_generation(cmd->se_dev); 3020c66ac9dbSNicholas Bellinger return 0; 3021c66ac9dbSNicholas Bellinger } 3022c66ac9dbSNicholas Bellinger 3023de103c93SChristoph Hellwig static sense_reason_t 3024de103c93SChristoph Hellwig core_scsi3_emulate_pro_preempt(struct se_cmd *cmd, int type, int scope, 302533ce6a87SAndy Grover u64 res_key, u64 sa_res_key, enum preempt_type preempt_type) 3026c66ac9dbSNicholas Bellinger { 3027c66ac9dbSNicholas Bellinger switch (type) { 3028c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE: 3029c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS: 3030c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: 3031c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: 3032c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: 3033c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: 3034de103c93SChristoph Hellwig return core_scsi3_pro_preempt(cmd, type, scope, res_key, 303533ce6a87SAndy Grover sa_res_key, preempt_type); 3036c66ac9dbSNicholas Bellinger default: 30376708bb27SAndy Grover pr_err("SPC-3 PR: Unknown Service Action PREEMPT%s" 303833ce6a87SAndy Grover " Type: 0x%02x\n", (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : "", type); 3039de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 3040c66ac9dbSNicholas Bellinger } 3041c66ac9dbSNicholas Bellinger } 3042c66ac9dbSNicholas Bellinger 3043c66ac9dbSNicholas Bellinger 3044de103c93SChristoph Hellwig static sense_reason_t 3045de103c93SChristoph Hellwig core_scsi3_emulate_pro_register_and_move(struct se_cmd *cmd, u64 res_key, 3046de103c93SChristoph Hellwig u64 sa_res_key, int aptpl, int unreg) 3047c66ac9dbSNicholas Bellinger { 3048e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 30495951146dSAndy Grover struct se_device *dev = cmd->se_dev; 305028168905SJörn Engel struct se_dev_entry *dest_se_deve = NULL; 3051e3d6f909SAndy Grover struct se_lun *se_lun = cmd->se_lun; 3052c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl, *pr_reg_nacl, *dest_node_acl = NULL; 3053c66ac9dbSNicholas Bellinger struct se_port *se_port; 3054c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg, *dest_se_tpg = NULL; 3055c66ac9dbSNicholas Bellinger struct target_core_fabric_ops *dest_tf_ops = NULL, *tf_ops; 3056c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_res_holder, *dest_pr_reg; 30570fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 305805d1c7c0SAndy Grover unsigned char *buf; 3059c66ac9dbSNicholas Bellinger unsigned char *initiator_str; 3060c66ac9dbSNicholas Bellinger char *iport_ptr = NULL, dest_iport[64], i_buf[PR_REG_ISID_ID_LEN]; 3061c66ac9dbSNicholas Bellinger u32 tid_len, tmp_tid_len; 3062d2843c17SAndy Grover int new_reg = 0, type, scope, matching_iname; 3063de103c93SChristoph Hellwig sense_reason_t ret; 3064c66ac9dbSNicholas Bellinger unsigned short rtpi; 3065c66ac9dbSNicholas Bellinger unsigned char proto_ident; 3066c66ac9dbSNicholas Bellinger 30676708bb27SAndy Grover if (!se_sess || !se_lun) { 30686708bb27SAndy Grover pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); 3069de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3070c66ac9dbSNicholas Bellinger } 3071de103c93SChristoph Hellwig 3072c66ac9dbSNicholas Bellinger memset(dest_iport, 0, 64); 3073c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 3074c66ac9dbSNicholas Bellinger se_tpg = se_sess->se_tpg; 3075e3d6f909SAndy Grover tf_ops = se_tpg->se_tpg_tfo; 3076c66ac9dbSNicholas Bellinger /* 3077c66ac9dbSNicholas Bellinger * Follow logic from spc4r17 Section 5.7.8, Table 50 -- 3078c66ac9dbSNicholas Bellinger * Register behaviors for a REGISTER AND MOVE service action 3079c66ac9dbSNicholas Bellinger * 3080c66ac9dbSNicholas Bellinger * Locate the existing *pr_reg via struct se_node_acl pointers 3081c66ac9dbSNicholas Bellinger */ 30825951146dSAndy Grover pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, 3083c66ac9dbSNicholas Bellinger se_sess); 30846708bb27SAndy Grover if (!pr_reg) { 30856708bb27SAndy Grover pr_err("SPC-3 PR: Unable to locate PR_REGISTERED" 3086c66ac9dbSNicholas Bellinger " *pr_reg for REGISTER_AND_MOVE\n"); 3087de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3088c66ac9dbSNicholas Bellinger } 3089c66ac9dbSNicholas Bellinger /* 3090c66ac9dbSNicholas Bellinger * The provided reservation key much match the existing reservation key 3091c66ac9dbSNicholas Bellinger * provided during this initiator's I_T nexus registration. 3092c66ac9dbSNicholas Bellinger */ 3093c66ac9dbSNicholas Bellinger if (res_key != pr_reg->pr_res_key) { 30946708bb27SAndy Grover pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received" 3095c66ac9dbSNicholas Bellinger " res_key: 0x%016Lx does not match existing SA REGISTER" 3096c66ac9dbSNicholas Bellinger " res_key: 0x%016Lx\n", res_key, pr_reg->pr_res_key); 3097de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 3098de103c93SChristoph Hellwig goto out_put_pr_reg; 3099c66ac9dbSNicholas Bellinger } 3100c66ac9dbSNicholas Bellinger /* 3101c66ac9dbSNicholas Bellinger * The service active reservation key needs to be non zero 3102c66ac9dbSNicholas Bellinger */ 31036708bb27SAndy Grover if (!sa_res_key) { 31046708bb27SAndy Grover pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received zero" 3105c66ac9dbSNicholas Bellinger " sa_res_key\n"); 3106de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3107de103c93SChristoph Hellwig goto out_put_pr_reg; 3108c66ac9dbSNicholas Bellinger } 310905d1c7c0SAndy Grover 3110c66ac9dbSNicholas Bellinger /* 3111c66ac9dbSNicholas Bellinger * Determine the Relative Target Port Identifier where the reservation 3112c66ac9dbSNicholas Bellinger * will be moved to for the TransportID containing SCSI initiator WWN 3113c66ac9dbSNicholas Bellinger * information. 3114c66ac9dbSNicholas Bellinger */ 31154949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3116de103c93SChristoph Hellwig if (!buf) { 3117de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3118de103c93SChristoph Hellwig goto out_put_pr_reg; 3119de103c93SChristoph Hellwig } 3120de103c93SChristoph Hellwig 3121c66ac9dbSNicholas Bellinger rtpi = (buf[18] & 0xff) << 8; 3122c66ac9dbSNicholas Bellinger rtpi |= buf[19] & 0xff; 3123c66ac9dbSNicholas Bellinger tid_len = (buf[20] & 0xff) << 24; 3124c66ac9dbSNicholas Bellinger tid_len |= (buf[21] & 0xff) << 16; 3125c66ac9dbSNicholas Bellinger tid_len |= (buf[22] & 0xff) << 8; 3126c66ac9dbSNicholas Bellinger tid_len |= buf[23] & 0xff; 31274949314cSAndy Grover transport_kunmap_data_sg(cmd); 312805d1c7c0SAndy Grover buf = NULL; 3129c66ac9dbSNicholas Bellinger 3130c66ac9dbSNicholas Bellinger if ((tid_len + 24) != cmd->data_length) { 31316708bb27SAndy Grover pr_err("SPC-3 PR: Illegal tid_len: %u + 24 byte header" 3132c66ac9dbSNicholas Bellinger " does not equal CDB data_length: %u\n", tid_len, 3133c66ac9dbSNicholas Bellinger cmd->data_length); 3134de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3135de103c93SChristoph Hellwig goto out_put_pr_reg; 3136c66ac9dbSNicholas Bellinger } 3137c66ac9dbSNicholas Bellinger 3138c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 3139c66ac9dbSNicholas Bellinger list_for_each_entry(se_port, &dev->dev_sep_list, sep_list) { 3140c66ac9dbSNicholas Bellinger if (se_port->sep_rtpi != rtpi) 3141c66ac9dbSNicholas Bellinger continue; 3142c66ac9dbSNicholas Bellinger dest_se_tpg = se_port->sep_tpg; 31436708bb27SAndy Grover if (!dest_se_tpg) 3144c66ac9dbSNicholas Bellinger continue; 3145e3d6f909SAndy Grover dest_tf_ops = dest_se_tpg->se_tpg_tfo; 31466708bb27SAndy Grover if (!dest_tf_ops) 3147c66ac9dbSNicholas Bellinger continue; 3148c66ac9dbSNicholas Bellinger 314933940d09SJoern Engel atomic_inc_mb(&dest_se_tpg->tpg_pr_ref_count); 3150c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 3151c66ac9dbSNicholas Bellinger 3152de103c93SChristoph Hellwig if (core_scsi3_tpg_depend_item(dest_se_tpg)) { 31536708bb27SAndy Grover pr_err("core_scsi3_tpg_depend_item() failed" 3154c66ac9dbSNicholas Bellinger " for dest_se_tpg\n"); 315533940d09SJoern Engel atomic_dec_mb(&dest_se_tpg->tpg_pr_ref_count); 3156de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3157de103c93SChristoph Hellwig goto out_put_pr_reg; 3158c66ac9dbSNicholas Bellinger } 3159c66ac9dbSNicholas Bellinger 3160c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 3161c66ac9dbSNicholas Bellinger break; 3162c66ac9dbSNicholas Bellinger } 3163c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 3164c66ac9dbSNicholas Bellinger 31656708bb27SAndy Grover if (!dest_se_tpg || !dest_tf_ops) { 31666708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate" 3167c66ac9dbSNicholas Bellinger " fabric ops from Relative Target Port Identifier:" 3168c66ac9dbSNicholas Bellinger " %hu\n", rtpi); 3169de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3170de103c93SChristoph Hellwig goto out_put_pr_reg; 3171c66ac9dbSNicholas Bellinger } 317205d1c7c0SAndy Grover 31734949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3174de103c93SChristoph Hellwig if (!buf) { 3175de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3176de103c93SChristoph Hellwig goto out_put_pr_reg; 3177de103c93SChristoph Hellwig } 3178c66ac9dbSNicholas Bellinger proto_ident = (buf[24] & 0x0f); 31798b1e1244SAndy Grover 31806708bb27SAndy Grover pr_debug("SPC-3 PR REGISTER_AND_MOVE: Extracted Protocol Identifier:" 3181c66ac9dbSNicholas Bellinger " 0x%02x\n", proto_ident); 31828b1e1244SAndy Grover 3183c66ac9dbSNicholas Bellinger if (proto_ident != dest_tf_ops->get_fabric_proto_ident(dest_se_tpg)) { 31846708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: Received" 3185c66ac9dbSNicholas Bellinger " proto_ident: 0x%02x does not match ident: 0x%02x" 3186c66ac9dbSNicholas Bellinger " from fabric: %s\n", proto_ident, 3187c66ac9dbSNicholas Bellinger dest_tf_ops->get_fabric_proto_ident(dest_se_tpg), 3188c66ac9dbSNicholas Bellinger dest_tf_ops->get_fabric_name()); 3189de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3190c66ac9dbSNicholas Bellinger goto out; 3191c66ac9dbSNicholas Bellinger } 3192c66ac9dbSNicholas Bellinger if (dest_tf_ops->tpg_parse_pr_out_transport_id == NULL) { 31936708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: Fabric does not" 3194c66ac9dbSNicholas Bellinger " containg a valid tpg_parse_pr_out_transport_id" 3195c66ac9dbSNicholas Bellinger " function pointer\n"); 3196de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3197c66ac9dbSNicholas Bellinger goto out; 3198c66ac9dbSNicholas Bellinger } 3199c66ac9dbSNicholas Bellinger initiator_str = dest_tf_ops->tpg_parse_pr_out_transport_id(dest_se_tpg, 3200c66ac9dbSNicholas Bellinger (const char *)&buf[24], &tmp_tid_len, &iport_ptr); 32016708bb27SAndy Grover if (!initiator_str) { 32026708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate" 3203c66ac9dbSNicholas Bellinger " initiator_str from Transport ID\n"); 3204de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3205c66ac9dbSNicholas Bellinger goto out; 3206c66ac9dbSNicholas Bellinger } 3207c66ac9dbSNicholas Bellinger 32084949314cSAndy Grover transport_kunmap_data_sg(cmd); 320905d1c7c0SAndy Grover buf = NULL; 321005d1c7c0SAndy Grover 32116708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Extracted initiator %s identifier: %s" 3212c66ac9dbSNicholas Bellinger " %s\n", dest_tf_ops->get_fabric_name(), (iport_ptr != NULL) ? 3213c66ac9dbSNicholas Bellinger "port" : "device", initiator_str, (iport_ptr != NULL) ? 3214c66ac9dbSNicholas Bellinger iport_ptr : ""); 3215c66ac9dbSNicholas Bellinger /* 3216c66ac9dbSNicholas Bellinger * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service 3217c66ac9dbSNicholas Bellinger * action specifies a TransportID that is the same as the initiator port 3218c66ac9dbSNicholas Bellinger * of the I_T nexus for the command received, then the command shall 3219c66ac9dbSNicholas Bellinger * be terminated with CHECK CONDITION status, with the sense key set to 3220c66ac9dbSNicholas Bellinger * ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD 3221c66ac9dbSNicholas Bellinger * IN PARAMETER LIST. 3222c66ac9dbSNicholas Bellinger */ 3223c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 3224c66ac9dbSNicholas Bellinger matching_iname = (!strcmp(initiator_str, 3225c66ac9dbSNicholas Bellinger pr_reg_nacl->initiatorname)) ? 1 : 0; 32266708bb27SAndy Grover if (!matching_iname) 3227c66ac9dbSNicholas Bellinger goto after_iport_check; 3228c66ac9dbSNicholas Bellinger 32296708bb27SAndy Grover if (!iport_ptr || !pr_reg->isid_present_at_reg) { 32306708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s" 3231c66ac9dbSNicholas Bellinger " matches: %s on received I_T Nexus\n", initiator_str, 3232c66ac9dbSNicholas Bellinger pr_reg_nacl->initiatorname); 3233de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3234c66ac9dbSNicholas Bellinger goto out; 3235c66ac9dbSNicholas Bellinger } 32366708bb27SAndy Grover if (!strcmp(iport_ptr, pr_reg->pr_reg_isid)) { 32376708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s %s" 3238c66ac9dbSNicholas Bellinger " matches: %s %s on received I_T Nexus\n", 3239c66ac9dbSNicholas Bellinger initiator_str, iport_ptr, pr_reg_nacl->initiatorname, 3240c66ac9dbSNicholas Bellinger pr_reg->pr_reg_isid); 3241de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3242c66ac9dbSNicholas Bellinger goto out; 3243c66ac9dbSNicholas Bellinger } 3244c66ac9dbSNicholas Bellinger after_iport_check: 3245c66ac9dbSNicholas Bellinger /* 3246c66ac9dbSNicholas Bellinger * Locate the destination struct se_node_acl from the received Transport ID 3247c66ac9dbSNicholas Bellinger */ 324828638887SRoland Dreier spin_lock_irq(&dest_se_tpg->acl_node_lock); 3249c66ac9dbSNicholas Bellinger dest_node_acl = __core_tpg_get_initiator_node_acl(dest_se_tpg, 3250c66ac9dbSNicholas Bellinger initiator_str); 325133940d09SJoern Engel if (dest_node_acl) 325233940d09SJoern Engel atomic_inc_mb(&dest_node_acl->acl_pr_ref_count); 325328638887SRoland Dreier spin_unlock_irq(&dest_se_tpg->acl_node_lock); 3254c66ac9dbSNicholas Bellinger 32556708bb27SAndy Grover if (!dest_node_acl) { 32566708bb27SAndy Grover pr_err("Unable to locate %s dest_node_acl for" 3257c66ac9dbSNicholas Bellinger " TransportID%s\n", dest_tf_ops->get_fabric_name(), 3258c66ac9dbSNicholas Bellinger initiator_str); 3259de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3260c66ac9dbSNicholas Bellinger goto out; 3261c66ac9dbSNicholas Bellinger } 3262de103c93SChristoph Hellwig 3263de103c93SChristoph Hellwig if (core_scsi3_nodeacl_depend_item(dest_node_acl)) { 32646708bb27SAndy Grover pr_err("core_scsi3_nodeacl_depend_item() for" 3265c66ac9dbSNicholas Bellinger " dest_node_acl\n"); 326633940d09SJoern Engel atomic_dec_mb(&dest_node_acl->acl_pr_ref_count); 3267c66ac9dbSNicholas Bellinger dest_node_acl = NULL; 3268de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3269c66ac9dbSNicholas Bellinger goto out; 3270c66ac9dbSNicholas Bellinger } 32718b1e1244SAndy Grover 32726708bb27SAndy Grover pr_debug("SPC-3 PR REGISTER_AND_MOVE: Found %s dest_node_acl:" 3273c66ac9dbSNicholas Bellinger " %s from TransportID\n", dest_tf_ops->get_fabric_name(), 3274c66ac9dbSNicholas Bellinger dest_node_acl->initiatorname); 32758b1e1244SAndy Grover 3276c66ac9dbSNicholas Bellinger /* 3277c66ac9dbSNicholas Bellinger * Locate the struct se_dev_entry pointer for the matching RELATIVE TARGET 3278c66ac9dbSNicholas Bellinger * PORT IDENTIFIER. 3279c66ac9dbSNicholas Bellinger */ 3280c66ac9dbSNicholas Bellinger dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, rtpi); 32816708bb27SAndy Grover if (!dest_se_deve) { 32826708bb27SAndy Grover pr_err("Unable to locate %s dest_se_deve from RTPI:" 3283c66ac9dbSNicholas Bellinger " %hu\n", dest_tf_ops->get_fabric_name(), rtpi); 3284de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3285c66ac9dbSNicholas Bellinger goto out; 3286c66ac9dbSNicholas Bellinger } 3287c66ac9dbSNicholas Bellinger 3288de103c93SChristoph Hellwig if (core_scsi3_lunacl_depend_item(dest_se_deve)) { 32896708bb27SAndy Grover pr_err("core_scsi3_lunacl_depend_item() failed\n"); 329033940d09SJoern Engel atomic_dec_mb(&dest_se_deve->pr_ref_count); 3291c66ac9dbSNicholas Bellinger dest_se_deve = NULL; 3292de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3293c66ac9dbSNicholas Bellinger goto out; 3294c66ac9dbSNicholas Bellinger } 32958b1e1244SAndy Grover 32966708bb27SAndy Grover pr_debug("SPC-3 PR REGISTER_AND_MOVE: Located %s node %s LUN" 3297c66ac9dbSNicholas Bellinger " ACL for dest_se_deve->mapped_lun: %u\n", 3298c66ac9dbSNicholas Bellinger dest_tf_ops->get_fabric_name(), dest_node_acl->initiatorname, 3299c66ac9dbSNicholas Bellinger dest_se_deve->mapped_lun); 33008b1e1244SAndy Grover 3301c66ac9dbSNicholas Bellinger /* 3302c66ac9dbSNicholas Bellinger * A persistent reservation needs to already existing in order to 3303c66ac9dbSNicholas Bellinger * successfully complete the REGISTER_AND_MOVE service action.. 3304c66ac9dbSNicholas Bellinger */ 3305c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 3306c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 33076708bb27SAndy Grover if (!pr_res_holder) { 33086708bb27SAndy Grover pr_warn("SPC-3 PR REGISTER_AND_MOVE: No reservation" 3309c66ac9dbSNicholas Bellinger " currently held\n"); 3310c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3311de103c93SChristoph Hellwig ret = TCM_INVALID_CDB_FIELD; 3312c66ac9dbSNicholas Bellinger goto out; 3313c66ac9dbSNicholas Bellinger } 3314c66ac9dbSNicholas Bellinger /* 3315c66ac9dbSNicholas Bellinger * The received on I_T Nexus must be the reservation holder. 3316c66ac9dbSNicholas Bellinger * 3317c66ac9dbSNicholas Bellinger * From spc4r17 section 5.7.8 Table 50 -- 3318c66ac9dbSNicholas Bellinger * Register behaviors for a REGISTER AND MOVE service action 3319c66ac9dbSNicholas Bellinger */ 3320c66ac9dbSNicholas Bellinger if (pr_res_holder != pr_reg) { 33216708bb27SAndy Grover pr_warn("SPC-3 PR REGISTER_AND_MOVE: Calling I_T" 3322c66ac9dbSNicholas Bellinger " Nexus is not reservation holder\n"); 3323c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3324de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 3325c66ac9dbSNicholas Bellinger goto out; 3326c66ac9dbSNicholas Bellinger } 3327c66ac9dbSNicholas Bellinger /* 3328c66ac9dbSNicholas Bellinger * From spc4r17 section 5.7.8: registering and moving reservation 3329c66ac9dbSNicholas Bellinger * 3330c66ac9dbSNicholas Bellinger * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service 3331c66ac9dbSNicholas Bellinger * action is received and the established persistent reservation is a 3332c66ac9dbSNicholas Bellinger * Write Exclusive - All Registrants type or Exclusive Access - 3333c66ac9dbSNicholas Bellinger * All Registrants type reservation, then the command shall be completed 3334c66ac9dbSNicholas Bellinger * with RESERVATION CONFLICT status. 3335c66ac9dbSNicholas Bellinger */ 3336c66ac9dbSNicholas Bellinger if ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 3337c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { 33386708bb27SAndy Grover pr_warn("SPC-3 PR REGISTER_AND_MOVE: Unable to move" 3339c66ac9dbSNicholas Bellinger " reservation for type: %s\n", 3340c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_res_holder->pr_res_type)); 3341c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3342de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 3343c66ac9dbSNicholas Bellinger goto out; 3344c66ac9dbSNicholas Bellinger } 3345c66ac9dbSNicholas Bellinger pr_res_nacl = pr_res_holder->pr_reg_nacl; 3346c66ac9dbSNicholas Bellinger /* 3347c66ac9dbSNicholas Bellinger * b) Ignore the contents of the (received) SCOPE and TYPE fields; 3348c66ac9dbSNicholas Bellinger */ 3349c66ac9dbSNicholas Bellinger type = pr_res_holder->pr_res_type; 3350c66ac9dbSNicholas Bellinger scope = pr_res_holder->pr_res_type; 3351c66ac9dbSNicholas Bellinger /* 3352c66ac9dbSNicholas Bellinger * c) Associate the reservation key specified in the SERVICE ACTION 3353c66ac9dbSNicholas Bellinger * RESERVATION KEY field with the I_T nexus specified as the 3354c66ac9dbSNicholas Bellinger * destination of the register and move, where: 3355c66ac9dbSNicholas Bellinger * A) The I_T nexus is specified by the TransportID and the 3356c66ac9dbSNicholas Bellinger * RELATIVE TARGET PORT IDENTIFIER field (see 6.14.4); and 3357c66ac9dbSNicholas Bellinger * B) Regardless of the TransportID format used, the association for 3358c66ac9dbSNicholas Bellinger * the initiator port is based on either the initiator port name 3359c66ac9dbSNicholas Bellinger * (see 3.1.71) on SCSI transport protocols where port names are 3360c66ac9dbSNicholas Bellinger * required or the initiator port identifier (see 3.1.70) on SCSI 3361c66ac9dbSNicholas Bellinger * transport protocols where port names are not required; 3362c66ac9dbSNicholas Bellinger * d) Register the reservation key specified in the SERVICE ACTION 3363c66ac9dbSNicholas Bellinger * RESERVATION KEY field; 3364c66ac9dbSNicholas Bellinger * e) Retain the reservation key specified in the SERVICE ACTION 3365c66ac9dbSNicholas Bellinger * RESERVATION KEY field and associated information; 3366c66ac9dbSNicholas Bellinger * 3367c66ac9dbSNicholas Bellinger * Also, It is not an error for a REGISTER AND MOVE service action to 3368c66ac9dbSNicholas Bellinger * register an I_T nexus that is already registered with the same 3369c66ac9dbSNicholas Bellinger * reservation key or a different reservation key. 3370c66ac9dbSNicholas Bellinger */ 3371c66ac9dbSNicholas Bellinger dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl, 3372c66ac9dbSNicholas Bellinger iport_ptr); 33736708bb27SAndy Grover if (!dest_pr_reg) { 3374de103c93SChristoph Hellwig if (core_scsi3_alloc_registration(cmd->se_dev, 3375c66ac9dbSNicholas Bellinger dest_node_acl, dest_se_deve, iport_ptr, 3376de103c93SChristoph Hellwig sa_res_key, 0, aptpl, 2, 1)) { 3377c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3378de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3379c66ac9dbSNicholas Bellinger goto out; 3380c66ac9dbSNicholas Bellinger } 3381c66ac9dbSNicholas Bellinger dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl, 3382c66ac9dbSNicholas Bellinger iport_ptr); 3383c66ac9dbSNicholas Bellinger new_reg = 1; 3384c66ac9dbSNicholas Bellinger } 3385c66ac9dbSNicholas Bellinger /* 3386c66ac9dbSNicholas Bellinger * f) Release the persistent reservation for the persistent reservation 3387c66ac9dbSNicholas Bellinger * holder (i.e., the I_T nexus on which the 3388c66ac9dbSNicholas Bellinger */ 3389c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, pr_res_nacl, 3390c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder, 0); 3391c66ac9dbSNicholas Bellinger /* 3392c66ac9dbSNicholas Bellinger * g) Move the persistent reservation to the specified I_T nexus using 3393c66ac9dbSNicholas Bellinger * the same scope and type as the persistent reservation released in 3394c66ac9dbSNicholas Bellinger * item f); and 3395c66ac9dbSNicholas Bellinger */ 3396c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = dest_pr_reg; 3397c66ac9dbSNicholas Bellinger dest_pr_reg->pr_res_holder = 1; 3398c66ac9dbSNicholas Bellinger dest_pr_reg->pr_res_type = type; 3399c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope = scope; 3400d2843c17SAndy Grover core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 3401c66ac9dbSNicholas Bellinger /* 3402c66ac9dbSNicholas Bellinger * Increment PRGeneration for existing registrations.. 3403c66ac9dbSNicholas Bellinger */ 34046708bb27SAndy Grover if (!new_reg) 3405c66ac9dbSNicholas Bellinger dest_pr_reg->pr_res_generation = pr_tmpl->pr_generation++; 3406c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3407c66ac9dbSNicholas Bellinger 34086708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: REGISTER_AND_MOVE" 3409c66ac9dbSNicholas Bellinger " created new reservation holder TYPE: %s on object RTPI:" 3410c66ac9dbSNicholas Bellinger " %hu PRGeneration: 0x%08x\n", dest_tf_ops->get_fabric_name(), 3411c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(type), rtpi, 3412c66ac9dbSNicholas Bellinger dest_pr_reg->pr_res_generation); 34136708bb27SAndy Grover pr_debug("SPC-3 PR Successfully moved reservation from" 3414c66ac9dbSNicholas Bellinger " %s Fabric Node: %s%s -> %s Fabric Node: %s %s\n", 3415c66ac9dbSNicholas Bellinger tf_ops->get_fabric_name(), pr_reg_nacl->initiatorname, 3416d2843c17SAndy Grover i_buf, dest_tf_ops->get_fabric_name(), 3417c66ac9dbSNicholas Bellinger dest_node_acl->initiatorname, (iport_ptr != NULL) ? 3418c66ac9dbSNicholas Bellinger iport_ptr : ""); 3419c66ac9dbSNicholas Bellinger /* 3420c66ac9dbSNicholas Bellinger * It is now safe to release configfs group dependencies for destination 3421c66ac9dbSNicholas Bellinger * of Transport ID Initiator Device/Port Identifier 3422c66ac9dbSNicholas Bellinger */ 3423c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 3424c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 3425c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_se_tpg); 3426c66ac9dbSNicholas Bellinger /* 3427c66ac9dbSNicholas Bellinger * h) If the UNREG bit is set to one, unregister (see 5.7.11.3) the I_T 3428c66ac9dbSNicholas Bellinger * nexus on which PERSISTENT RESERVE OUT command was received. 3429c66ac9dbSNicholas Bellinger */ 3430c66ac9dbSNicholas Bellinger if (unreg) { 3431c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 3432c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, NULL, 1); 3433c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 3434c66ac9dbSNicholas Bellinger } else 3435c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 3436c66ac9dbSNicholas Bellinger 3437459f213bSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, aptpl); 3438c66ac9dbSNicholas Bellinger 34394949314cSAndy Grover transport_kunmap_data_sg(cmd); 344005d1c7c0SAndy Grover 3441c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(dest_pr_reg); 3442c66ac9dbSNicholas Bellinger return 0; 3443c66ac9dbSNicholas Bellinger out: 344405d1c7c0SAndy Grover if (buf) 34454949314cSAndy Grover transport_kunmap_data_sg(cmd); 3446c66ac9dbSNicholas Bellinger if (dest_se_deve) 3447c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 3448c66ac9dbSNicholas Bellinger if (dest_node_acl) 3449c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 3450c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_se_tpg); 3451de103c93SChristoph Hellwig 3452de103c93SChristoph Hellwig out_put_pr_reg: 3453c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 3454c66ac9dbSNicholas Bellinger return ret; 3455c66ac9dbSNicholas Bellinger } 3456c66ac9dbSNicholas Bellinger 3457c66ac9dbSNicholas Bellinger static unsigned long long core_scsi3_extract_reservation_key(unsigned char *cdb) 3458c66ac9dbSNicholas Bellinger { 3459c66ac9dbSNicholas Bellinger unsigned int __v1, __v2; 3460c66ac9dbSNicholas Bellinger 3461c66ac9dbSNicholas Bellinger __v1 = (cdb[0] << 24) | (cdb[1] << 16) | (cdb[2] << 8) | cdb[3]; 3462c66ac9dbSNicholas Bellinger __v2 = (cdb[4] << 24) | (cdb[5] << 16) | (cdb[6] << 8) | cdb[7]; 3463c66ac9dbSNicholas Bellinger 3464c66ac9dbSNicholas Bellinger return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; 3465c66ac9dbSNicholas Bellinger } 3466c66ac9dbSNicholas Bellinger 3467c66ac9dbSNicholas Bellinger /* 3468c66ac9dbSNicholas Bellinger * See spc4r17 section 6.14 Table 170 3469c66ac9dbSNicholas Bellinger */ 3470de103c93SChristoph Hellwig sense_reason_t 3471de103c93SChristoph Hellwig target_scsi3_emulate_pr_out(struct se_cmd *cmd) 3472c66ac9dbSNicholas Bellinger { 3473617c0e06SChristoph Hellwig unsigned char *cdb = &cmd->t_task_cdb[0]; 347405d1c7c0SAndy Grover unsigned char *buf; 3475c66ac9dbSNicholas Bellinger u64 res_key, sa_res_key; 3476c66ac9dbSNicholas Bellinger int sa, scope, type, aptpl; 3477c66ac9dbSNicholas Bellinger int spec_i_pt = 0, all_tg_pt = 0, unreg = 0; 3478de103c93SChristoph Hellwig sense_reason_t ret; 3479617c0e06SChristoph Hellwig 3480617c0e06SChristoph Hellwig /* 3481617c0e06SChristoph Hellwig * Following spc2r20 5.5.1 Reservations overview: 3482617c0e06SChristoph Hellwig * 3483617c0e06SChristoph Hellwig * If a logical unit has been reserved by any RESERVE command and is 3484617c0e06SChristoph Hellwig * still reserved by any initiator, all PERSISTENT RESERVE IN and all 3485617c0e06SChristoph Hellwig * PERSISTENT RESERVE OUT commands shall conflict regardless of 3486617c0e06SChristoph Hellwig * initiator or service action and shall terminate with a RESERVATION 3487617c0e06SChristoph Hellwig * CONFLICT status. 3488617c0e06SChristoph Hellwig */ 34890fd97ccfSChristoph Hellwig if (cmd->se_dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) { 3490617c0e06SChristoph Hellwig pr_err("Received PERSISTENT_RESERVE CDB while legacy" 3491617c0e06SChristoph Hellwig " SPC-2 reservation is held, returning" 3492617c0e06SChristoph Hellwig " RESERVATION_CONFLICT\n"); 3493de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 3494617c0e06SChristoph Hellwig } 3495617c0e06SChristoph Hellwig 3496c66ac9dbSNicholas Bellinger /* 3497c66ac9dbSNicholas Bellinger * FIXME: A NULL struct se_session pointer means an this is not coming from 3498c66ac9dbSNicholas Bellinger * a $FABRIC_MOD's nexus, but from internal passthrough ops. 3499c66ac9dbSNicholas Bellinger */ 3500de103c93SChristoph Hellwig if (!cmd->se_sess) 3501de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3502c66ac9dbSNicholas Bellinger 3503c66ac9dbSNicholas Bellinger if (cmd->data_length < 24) { 35046708bb27SAndy Grover pr_warn("SPC-PR: Received PR OUT parameter list" 3505c66ac9dbSNicholas Bellinger " length too small: %u\n", cmd->data_length); 3506de103c93SChristoph Hellwig return TCM_INVALID_PARAMETER_LIST; 3507c66ac9dbSNicholas Bellinger } 3508de103c93SChristoph Hellwig 3509c66ac9dbSNicholas Bellinger /* 3510c66ac9dbSNicholas Bellinger * From the PERSISTENT_RESERVE_OUT command descriptor block (CDB) 3511c66ac9dbSNicholas Bellinger */ 3512c66ac9dbSNicholas Bellinger sa = (cdb[1] & 0x1f); 3513c66ac9dbSNicholas Bellinger scope = (cdb[2] & 0xf0); 3514c66ac9dbSNicholas Bellinger type = (cdb[2] & 0x0f); 351505d1c7c0SAndy Grover 35164949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3517de103c93SChristoph Hellwig if (!buf) 3518de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3519de103c93SChristoph Hellwig 3520c66ac9dbSNicholas Bellinger /* 3521c66ac9dbSNicholas Bellinger * From PERSISTENT_RESERVE_OUT parameter list (payload) 3522c66ac9dbSNicholas Bellinger */ 3523c66ac9dbSNicholas Bellinger res_key = core_scsi3_extract_reservation_key(&buf[0]); 3524c66ac9dbSNicholas Bellinger sa_res_key = core_scsi3_extract_reservation_key(&buf[8]); 3525c66ac9dbSNicholas Bellinger /* 3526c66ac9dbSNicholas Bellinger * REGISTER_AND_MOVE uses a different SA parameter list containing 3527c66ac9dbSNicholas Bellinger * SCSI TransportIDs. 3528c66ac9dbSNicholas Bellinger */ 3529c66ac9dbSNicholas Bellinger if (sa != PRO_REGISTER_AND_MOVE) { 3530c66ac9dbSNicholas Bellinger spec_i_pt = (buf[20] & 0x08); 3531c66ac9dbSNicholas Bellinger all_tg_pt = (buf[20] & 0x04); 3532c66ac9dbSNicholas Bellinger aptpl = (buf[20] & 0x01); 3533c66ac9dbSNicholas Bellinger } else { 3534c66ac9dbSNicholas Bellinger aptpl = (buf[17] & 0x01); 3535c66ac9dbSNicholas Bellinger unreg = (buf[17] & 0x02); 3536c66ac9dbSNicholas Bellinger } 35374949314cSAndy Grover transport_kunmap_data_sg(cmd); 353805d1c7c0SAndy Grover buf = NULL; 353905d1c7c0SAndy Grover 3540c66ac9dbSNicholas Bellinger /* 3541c66ac9dbSNicholas Bellinger * SPEC_I_PT=1 is only valid for Service action: REGISTER 3542c66ac9dbSNicholas Bellinger */ 3543de103c93SChristoph Hellwig if (spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER)) 3544de103c93SChristoph Hellwig return TCM_INVALID_PARAMETER_LIST; 3545d29a5b6aSChristoph Hellwig 3546c66ac9dbSNicholas Bellinger /* 3547c66ac9dbSNicholas Bellinger * From spc4r17 section 6.14: 3548c66ac9dbSNicholas Bellinger * 3549c66ac9dbSNicholas Bellinger * If the SPEC_I_PT bit is set to zero, the service action is not 3550c66ac9dbSNicholas Bellinger * REGISTER AND MOVE, and the parameter list length is not 24, then 3551c66ac9dbSNicholas Bellinger * the command shall be terminated with CHECK CONDITION status, with 3552c66ac9dbSNicholas Bellinger * the sense key set to ILLEGAL REQUEST, and the additional sense 3553c66ac9dbSNicholas Bellinger * code set to PARAMETER LIST LENGTH ERROR. 3554c66ac9dbSNicholas Bellinger */ 35556708bb27SAndy Grover if (!spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER_AND_MOVE) && 3556c66ac9dbSNicholas Bellinger (cmd->data_length != 24)) { 35576708bb27SAndy Grover pr_warn("SPC-PR: Received PR OUT illegal parameter" 3558c66ac9dbSNicholas Bellinger " list length: %u\n", cmd->data_length); 3559de103c93SChristoph Hellwig return TCM_INVALID_PARAMETER_LIST; 3560c66ac9dbSNicholas Bellinger } 3561de103c93SChristoph Hellwig 3562c66ac9dbSNicholas Bellinger /* 3563c66ac9dbSNicholas Bellinger * (core_scsi3_emulate_pro_* function parameters 3564c66ac9dbSNicholas Bellinger * are defined by spc4r17 Table 174: 3565c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_OUT service actions and valid parameters. 3566c66ac9dbSNicholas Bellinger */ 3567c66ac9dbSNicholas Bellinger switch (sa) { 3568c66ac9dbSNicholas Bellinger case PRO_REGISTER: 3569d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_register(cmd, 357033ce6a87SAndy Grover res_key, sa_res_key, aptpl, all_tg_pt, spec_i_pt, REGISTER); 3571d29a5b6aSChristoph Hellwig break; 3572c66ac9dbSNicholas Bellinger case PRO_RESERVE: 3573d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_reserve(cmd, type, scope, res_key); 3574d29a5b6aSChristoph Hellwig break; 3575c66ac9dbSNicholas Bellinger case PRO_RELEASE: 3576d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_release(cmd, type, scope, res_key); 3577d29a5b6aSChristoph Hellwig break; 3578c66ac9dbSNicholas Bellinger case PRO_CLEAR: 3579d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_clear(cmd, res_key); 3580d29a5b6aSChristoph Hellwig break; 3581c66ac9dbSNicholas Bellinger case PRO_PREEMPT: 3582d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_preempt(cmd, type, scope, 358333ce6a87SAndy Grover res_key, sa_res_key, PREEMPT); 3584d29a5b6aSChristoph Hellwig break; 3585c66ac9dbSNicholas Bellinger case PRO_PREEMPT_AND_ABORT: 3586d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_preempt(cmd, type, scope, 358733ce6a87SAndy Grover res_key, sa_res_key, PREEMPT_AND_ABORT); 3588d29a5b6aSChristoph Hellwig break; 3589c66ac9dbSNicholas Bellinger case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: 3590d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_register(cmd, 359133ce6a87SAndy Grover 0, sa_res_key, aptpl, all_tg_pt, spec_i_pt, REGISTER_AND_IGNORE_EXISTING_KEY); 3592d29a5b6aSChristoph Hellwig break; 3593c66ac9dbSNicholas Bellinger case PRO_REGISTER_AND_MOVE: 3594d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_register_and_move(cmd, res_key, 3595c66ac9dbSNicholas Bellinger sa_res_key, aptpl, unreg); 3596d29a5b6aSChristoph Hellwig break; 3597c66ac9dbSNicholas Bellinger default: 35986708bb27SAndy Grover pr_err("Unknown PERSISTENT_RESERVE_OUT service" 3599c66ac9dbSNicholas Bellinger " action: 0x%02x\n", cdb[1] & 0x1f); 3600de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 3601c66ac9dbSNicholas Bellinger } 3602c66ac9dbSNicholas Bellinger 36036bb35e00SChristoph Hellwig if (!ret) 36046bb35e00SChristoph Hellwig target_complete_cmd(cmd, GOOD); 3605d29a5b6aSChristoph Hellwig return ret; 3606c66ac9dbSNicholas Bellinger } 3607c66ac9dbSNicholas Bellinger 3608c66ac9dbSNicholas Bellinger /* 3609c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_IN Service Action READ_KEYS 3610c66ac9dbSNicholas Bellinger * 3611c66ac9dbSNicholas Bellinger * See spc4r17 section 5.7.6.2 and section 6.13.2, Table 160 3612c66ac9dbSNicholas Bellinger */ 3613de103c93SChristoph Hellwig static sense_reason_t 3614de103c93SChristoph Hellwig core_scsi3_pri_read_keys(struct se_cmd *cmd) 3615c66ac9dbSNicholas Bellinger { 36160fd97ccfSChristoph Hellwig struct se_device *dev = cmd->se_dev; 3617c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 361805d1c7c0SAndy Grover unsigned char *buf; 3619c66ac9dbSNicholas Bellinger u32 add_len = 0, off = 8; 3620c66ac9dbSNicholas Bellinger 3621c66ac9dbSNicholas Bellinger if (cmd->data_length < 8) { 36226708bb27SAndy Grover pr_err("PRIN SA READ_KEYS SCSI Data Length: %u" 3623c66ac9dbSNicholas Bellinger " too small\n", cmd->data_length); 3624de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 3625c66ac9dbSNicholas Bellinger } 3626c66ac9dbSNicholas Bellinger 36274949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3628de103c93SChristoph Hellwig if (!buf) 3629de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3630de103c93SChristoph Hellwig 36310fd97ccfSChristoph Hellwig buf[0] = ((dev->t10_pr.pr_generation >> 24) & 0xff); 36320fd97ccfSChristoph Hellwig buf[1] = ((dev->t10_pr.pr_generation >> 16) & 0xff); 36330fd97ccfSChristoph Hellwig buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff); 36340fd97ccfSChristoph Hellwig buf[3] = (dev->t10_pr.pr_generation & 0xff); 3635c66ac9dbSNicholas Bellinger 36360fd97ccfSChristoph Hellwig spin_lock(&dev->t10_pr.registration_lock); 36370fd97ccfSChristoph Hellwig list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 3638c66ac9dbSNicholas Bellinger pr_reg_list) { 3639c66ac9dbSNicholas Bellinger /* 3640c66ac9dbSNicholas Bellinger * Check for overflow of 8byte PRI READ_KEYS payload and 3641c66ac9dbSNicholas Bellinger * next reservation key list descriptor. 3642c66ac9dbSNicholas Bellinger */ 3643c66ac9dbSNicholas Bellinger if ((add_len + 8) > (cmd->data_length - 8)) 3644c66ac9dbSNicholas Bellinger break; 3645c66ac9dbSNicholas Bellinger 3646c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff); 3647c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff); 3648c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff); 3649c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff); 3650c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff); 3651c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff); 3652c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff); 3653c66ac9dbSNicholas Bellinger buf[off++] = (pr_reg->pr_res_key & 0xff); 3654c66ac9dbSNicholas Bellinger 3655c66ac9dbSNicholas Bellinger add_len += 8; 3656c66ac9dbSNicholas Bellinger } 36570fd97ccfSChristoph Hellwig spin_unlock(&dev->t10_pr.registration_lock); 3658c66ac9dbSNicholas Bellinger 3659c66ac9dbSNicholas Bellinger buf[4] = ((add_len >> 24) & 0xff); 3660c66ac9dbSNicholas Bellinger buf[5] = ((add_len >> 16) & 0xff); 3661c66ac9dbSNicholas Bellinger buf[6] = ((add_len >> 8) & 0xff); 3662c66ac9dbSNicholas Bellinger buf[7] = (add_len & 0xff); 3663c66ac9dbSNicholas Bellinger 36644949314cSAndy Grover transport_kunmap_data_sg(cmd); 366505d1c7c0SAndy Grover 3666c66ac9dbSNicholas Bellinger return 0; 3667c66ac9dbSNicholas Bellinger } 3668c66ac9dbSNicholas Bellinger 3669c66ac9dbSNicholas Bellinger /* 3670c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_IN Service Action READ_RESERVATION 3671c66ac9dbSNicholas Bellinger * 3672c66ac9dbSNicholas Bellinger * See spc4r17 section 5.7.6.3 and section 6.13.3.2 Table 161 and 162 3673c66ac9dbSNicholas Bellinger */ 3674de103c93SChristoph Hellwig static sense_reason_t 3675de103c93SChristoph Hellwig core_scsi3_pri_read_reservation(struct se_cmd *cmd) 3676c66ac9dbSNicholas Bellinger { 36770fd97ccfSChristoph Hellwig struct se_device *dev = cmd->se_dev; 3678c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 367905d1c7c0SAndy Grover unsigned char *buf; 3680c66ac9dbSNicholas Bellinger u64 pr_res_key; 3681c66ac9dbSNicholas Bellinger u32 add_len = 16; /* Hardcoded to 16 when a reservation is held. */ 3682c66ac9dbSNicholas Bellinger 3683c66ac9dbSNicholas Bellinger if (cmd->data_length < 8) { 36846708bb27SAndy Grover pr_err("PRIN SA READ_RESERVATIONS SCSI Data Length: %u" 3685c66ac9dbSNicholas Bellinger " too small\n", cmd->data_length); 3686de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 3687c66ac9dbSNicholas Bellinger } 3688c66ac9dbSNicholas Bellinger 36894949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3690de103c93SChristoph Hellwig if (!buf) 3691de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3692de103c93SChristoph Hellwig 36930fd97ccfSChristoph Hellwig buf[0] = ((dev->t10_pr.pr_generation >> 24) & 0xff); 36940fd97ccfSChristoph Hellwig buf[1] = ((dev->t10_pr.pr_generation >> 16) & 0xff); 36950fd97ccfSChristoph Hellwig buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff); 36960fd97ccfSChristoph Hellwig buf[3] = (dev->t10_pr.pr_generation & 0xff); 3697c66ac9dbSNicholas Bellinger 36980fd97ccfSChristoph Hellwig spin_lock(&dev->dev_reservation_lock); 36990fd97ccfSChristoph Hellwig pr_reg = dev->dev_pr_res_holder; 3700ee1b1b9cSAndy Grover if (pr_reg) { 3701c66ac9dbSNicholas Bellinger /* 3702c66ac9dbSNicholas Bellinger * Set the hardcoded Additional Length 3703c66ac9dbSNicholas Bellinger */ 3704c66ac9dbSNicholas Bellinger buf[4] = ((add_len >> 24) & 0xff); 3705c66ac9dbSNicholas Bellinger buf[5] = ((add_len >> 16) & 0xff); 3706c66ac9dbSNicholas Bellinger buf[6] = ((add_len >> 8) & 0xff); 3707c66ac9dbSNicholas Bellinger buf[7] = (add_len & 0xff); 3708c66ac9dbSNicholas Bellinger 370905d1c7c0SAndy Grover if (cmd->data_length < 22) 371005d1c7c0SAndy Grover goto err; 371105d1c7c0SAndy Grover 3712c66ac9dbSNicholas Bellinger /* 3713c66ac9dbSNicholas Bellinger * Set the Reservation key. 3714c66ac9dbSNicholas Bellinger * 3715c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.10: 3716c66ac9dbSNicholas Bellinger * A persistent reservation holder has its reservation key 3717c66ac9dbSNicholas Bellinger * returned in the parameter data from a PERSISTENT 3718c66ac9dbSNicholas Bellinger * RESERVE IN command with READ RESERVATION service action as 3719c66ac9dbSNicholas Bellinger * follows: 3720c66ac9dbSNicholas Bellinger * a) For a persistent reservation of the type Write Exclusive 3721c66ac9dbSNicholas Bellinger * - All Registrants or Exclusive Access All Regitrants, 3722c66ac9dbSNicholas Bellinger * the reservation key shall be set to zero; or 3723c66ac9dbSNicholas Bellinger * b) For all other persistent reservation types, the 3724c66ac9dbSNicholas Bellinger * reservation key shall be set to the registered 3725c66ac9dbSNicholas Bellinger * reservation key for the I_T nexus that holds the 3726c66ac9dbSNicholas Bellinger * persistent reservation. 3727c66ac9dbSNicholas Bellinger */ 3728c66ac9dbSNicholas Bellinger if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 3729c66ac9dbSNicholas Bellinger (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) 3730c66ac9dbSNicholas Bellinger pr_res_key = 0; 3731c66ac9dbSNicholas Bellinger else 3732c66ac9dbSNicholas Bellinger pr_res_key = pr_reg->pr_res_key; 3733c66ac9dbSNicholas Bellinger 3734c66ac9dbSNicholas Bellinger buf[8] = ((pr_res_key >> 56) & 0xff); 3735c66ac9dbSNicholas Bellinger buf[9] = ((pr_res_key >> 48) & 0xff); 3736c66ac9dbSNicholas Bellinger buf[10] = ((pr_res_key >> 40) & 0xff); 3737c66ac9dbSNicholas Bellinger buf[11] = ((pr_res_key >> 32) & 0xff); 3738c66ac9dbSNicholas Bellinger buf[12] = ((pr_res_key >> 24) & 0xff); 3739c66ac9dbSNicholas Bellinger buf[13] = ((pr_res_key >> 16) & 0xff); 3740c66ac9dbSNicholas Bellinger buf[14] = ((pr_res_key >> 8) & 0xff); 3741c66ac9dbSNicholas Bellinger buf[15] = (pr_res_key & 0xff); 3742c66ac9dbSNicholas Bellinger /* 3743c66ac9dbSNicholas Bellinger * Set the SCOPE and TYPE 3744c66ac9dbSNicholas Bellinger */ 3745c66ac9dbSNicholas Bellinger buf[21] = (pr_reg->pr_res_scope & 0xf0) | 3746c66ac9dbSNicholas Bellinger (pr_reg->pr_res_type & 0x0f); 3747c66ac9dbSNicholas Bellinger } 374805d1c7c0SAndy Grover 374905d1c7c0SAndy Grover err: 37500fd97ccfSChristoph Hellwig spin_unlock(&dev->dev_reservation_lock); 37514949314cSAndy Grover transport_kunmap_data_sg(cmd); 3752c66ac9dbSNicholas Bellinger 3753c66ac9dbSNicholas Bellinger return 0; 3754c66ac9dbSNicholas Bellinger } 3755c66ac9dbSNicholas Bellinger 3756c66ac9dbSNicholas Bellinger /* 3757c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_IN Service Action REPORT_CAPABILITIES 3758c66ac9dbSNicholas Bellinger * 3759c66ac9dbSNicholas Bellinger * See spc4r17 section 6.13.4 Table 165 3760c66ac9dbSNicholas Bellinger */ 3761de103c93SChristoph Hellwig static sense_reason_t 3762de103c93SChristoph Hellwig core_scsi3_pri_report_capabilities(struct se_cmd *cmd) 3763c66ac9dbSNicholas Bellinger { 37645951146dSAndy Grover struct se_device *dev = cmd->se_dev; 37650fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 376605d1c7c0SAndy Grover unsigned char *buf; 3767c66ac9dbSNicholas Bellinger u16 add_len = 8; /* Hardcoded to 8. */ 3768c66ac9dbSNicholas Bellinger 3769c66ac9dbSNicholas Bellinger if (cmd->data_length < 6) { 37706708bb27SAndy Grover pr_err("PRIN SA REPORT_CAPABILITIES SCSI Data Length:" 3771c66ac9dbSNicholas Bellinger " %u too small\n", cmd->data_length); 3772de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 3773c66ac9dbSNicholas Bellinger } 3774c66ac9dbSNicholas Bellinger 37754949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3776de103c93SChristoph Hellwig if (!buf) 3777de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 377805d1c7c0SAndy Grover 3779c435285dSJoern Engel buf[0] = ((add_len >> 8) & 0xff); 3780c66ac9dbSNicholas Bellinger buf[1] = (add_len & 0xff); 3781c66ac9dbSNicholas Bellinger buf[2] |= 0x10; /* CRH: Compatible Reservation Hanlding bit. */ 3782c66ac9dbSNicholas Bellinger buf[2] |= 0x08; /* SIP_C: Specify Initiator Ports Capable bit */ 3783c66ac9dbSNicholas Bellinger buf[2] |= 0x04; /* ATP_C: All Target Ports Capable bit */ 3784c66ac9dbSNicholas Bellinger buf[2] |= 0x01; /* PTPL_C: Persistence across Target Power Loss bit */ 3785c66ac9dbSNicholas Bellinger /* 3786c66ac9dbSNicholas Bellinger * We are filling in the PERSISTENT RESERVATION TYPE MASK below, so 3787c66ac9dbSNicholas Bellinger * set the TMV: Task Mask Valid bit. 3788c66ac9dbSNicholas Bellinger */ 3789c66ac9dbSNicholas Bellinger buf[3] |= 0x80; 3790c66ac9dbSNicholas Bellinger /* 3791c66ac9dbSNicholas Bellinger * Change ALLOW COMMANDs to 0x20 or 0x40 later from Table 166 3792c66ac9dbSNicholas Bellinger */ 3793c66ac9dbSNicholas Bellinger buf[3] |= 0x10; /* ALLOW COMMANDs field 001b */ 3794c66ac9dbSNicholas Bellinger /* 3795c66ac9dbSNicholas Bellinger * PTPL_A: Persistence across Target Power Loss Active bit 3796c66ac9dbSNicholas Bellinger */ 3797c66ac9dbSNicholas Bellinger if (pr_tmpl->pr_aptpl_active) 3798c66ac9dbSNicholas Bellinger buf[3] |= 0x01; 3799c66ac9dbSNicholas Bellinger /* 3800c66ac9dbSNicholas Bellinger * Setup the PERSISTENT RESERVATION TYPE MASK from Table 167 3801c66ac9dbSNicholas Bellinger */ 3802c66ac9dbSNicholas Bellinger buf[4] |= 0x80; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ 3803c66ac9dbSNicholas Bellinger buf[4] |= 0x40; /* PR_TYPE_EXCLUSIVE_ACCESS_REGONLY */ 3804c66ac9dbSNicholas Bellinger buf[4] |= 0x20; /* PR_TYPE_WRITE_EXCLUSIVE_REGONLY */ 3805c66ac9dbSNicholas Bellinger buf[4] |= 0x08; /* PR_TYPE_EXCLUSIVE_ACCESS */ 3806c66ac9dbSNicholas Bellinger buf[4] |= 0x02; /* PR_TYPE_WRITE_EXCLUSIVE */ 3807c66ac9dbSNicholas Bellinger buf[5] |= 0x01; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ 3808c66ac9dbSNicholas Bellinger 38094949314cSAndy Grover transport_kunmap_data_sg(cmd); 381005d1c7c0SAndy Grover 3811c66ac9dbSNicholas Bellinger return 0; 3812c66ac9dbSNicholas Bellinger } 3813c66ac9dbSNicholas Bellinger 3814c66ac9dbSNicholas Bellinger /* 3815c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_IN Service Action READ_FULL_STATUS 3816c66ac9dbSNicholas Bellinger * 3817c66ac9dbSNicholas Bellinger * See spc4r17 section 6.13.5 Table 168 and 169 3818c66ac9dbSNicholas Bellinger */ 3819de103c93SChristoph Hellwig static sense_reason_t 3820de103c93SChristoph Hellwig core_scsi3_pri_read_full_status(struct se_cmd *cmd) 3821c66ac9dbSNicholas Bellinger { 38220fd97ccfSChristoph Hellwig struct se_device *dev = cmd->se_dev; 3823c66ac9dbSNicholas Bellinger struct se_node_acl *se_nacl; 3824c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg; 3825c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp; 38260fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 382705d1c7c0SAndy Grover unsigned char *buf; 3828c66ac9dbSNicholas Bellinger u32 add_desc_len = 0, add_len = 0, desc_len, exp_desc_len; 3829c66ac9dbSNicholas Bellinger u32 off = 8; /* off into first Full Status descriptor */ 3830c66ac9dbSNicholas Bellinger int format_code = 0; 3831c66ac9dbSNicholas Bellinger 3832c66ac9dbSNicholas Bellinger if (cmd->data_length < 8) { 38336708bb27SAndy Grover pr_err("PRIN SA READ_FULL_STATUS SCSI Data Length: %u" 3834c66ac9dbSNicholas Bellinger " too small\n", cmd->data_length); 3835de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 3836c66ac9dbSNicholas Bellinger } 3837c66ac9dbSNicholas Bellinger 38384949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3839de103c93SChristoph Hellwig if (!buf) 3840de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 384105d1c7c0SAndy Grover 38420fd97ccfSChristoph Hellwig buf[0] = ((dev->t10_pr.pr_generation >> 24) & 0xff); 38430fd97ccfSChristoph Hellwig buf[1] = ((dev->t10_pr.pr_generation >> 16) & 0xff); 38440fd97ccfSChristoph Hellwig buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff); 38450fd97ccfSChristoph Hellwig buf[3] = (dev->t10_pr.pr_generation & 0xff); 3846c66ac9dbSNicholas Bellinger 3847c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 3848c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 3849c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 3850c66ac9dbSNicholas Bellinger 3851c66ac9dbSNicholas Bellinger se_nacl = pr_reg->pr_reg_nacl; 3852c66ac9dbSNicholas Bellinger se_tpg = pr_reg->pr_reg_nacl->se_tpg; 3853c66ac9dbSNicholas Bellinger add_desc_len = 0; 3854c66ac9dbSNicholas Bellinger 385533940d09SJoern Engel atomic_inc_mb(&pr_reg->pr_res_holders); 3856c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 3857c66ac9dbSNicholas Bellinger /* 3858c66ac9dbSNicholas Bellinger * Determine expected length of $FABRIC_MOD specific 3859c66ac9dbSNicholas Bellinger * TransportID full status descriptor.. 3860c66ac9dbSNicholas Bellinger */ 3861e3d6f909SAndy Grover exp_desc_len = se_tpg->se_tpg_tfo->tpg_get_pr_transport_id_len( 3862c66ac9dbSNicholas Bellinger se_tpg, se_nacl, pr_reg, &format_code); 3863c66ac9dbSNicholas Bellinger 3864c66ac9dbSNicholas Bellinger if ((exp_desc_len + add_len) > cmd->data_length) { 38656708bb27SAndy Grover pr_warn("SPC-3 PRIN READ_FULL_STATUS ran" 3866c66ac9dbSNicholas Bellinger " out of buffer: %d\n", cmd->data_length); 3867c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 386833940d09SJoern Engel atomic_dec_mb(&pr_reg->pr_res_holders); 3869c66ac9dbSNicholas Bellinger break; 3870c66ac9dbSNicholas Bellinger } 3871c66ac9dbSNicholas Bellinger /* 3872c66ac9dbSNicholas Bellinger * Set RESERVATION KEY 3873c66ac9dbSNicholas Bellinger */ 3874c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff); 3875c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff); 3876c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff); 3877c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff); 3878c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff); 3879c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff); 3880c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff); 3881c66ac9dbSNicholas Bellinger buf[off++] = (pr_reg->pr_res_key & 0xff); 3882c66ac9dbSNicholas Bellinger off += 4; /* Skip Over Reserved area */ 3883c66ac9dbSNicholas Bellinger 3884c66ac9dbSNicholas Bellinger /* 3885c66ac9dbSNicholas Bellinger * Set ALL_TG_PT bit if PROUT SA REGISTER had this set. 3886c66ac9dbSNicholas Bellinger */ 3887c66ac9dbSNicholas Bellinger if (pr_reg->pr_reg_all_tg_pt) 3888c66ac9dbSNicholas Bellinger buf[off] = 0x02; 3889c66ac9dbSNicholas Bellinger /* 3890c66ac9dbSNicholas Bellinger * The struct se_lun pointer will be present for the 3891c66ac9dbSNicholas Bellinger * reservation holder for PR_HOLDER bit. 3892c66ac9dbSNicholas Bellinger * 3893c66ac9dbSNicholas Bellinger * Also, if this registration is the reservation 3894c66ac9dbSNicholas Bellinger * holder, fill in SCOPE and TYPE in the next byte. 3895c66ac9dbSNicholas Bellinger */ 3896c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_holder) { 3897c66ac9dbSNicholas Bellinger buf[off++] |= 0x01; 3898c66ac9dbSNicholas Bellinger buf[off++] = (pr_reg->pr_res_scope & 0xf0) | 3899c66ac9dbSNicholas Bellinger (pr_reg->pr_res_type & 0x0f); 3900c66ac9dbSNicholas Bellinger } else 3901c66ac9dbSNicholas Bellinger off += 2; 3902c66ac9dbSNicholas Bellinger 3903c66ac9dbSNicholas Bellinger off += 4; /* Skip over reserved area */ 3904c66ac9dbSNicholas Bellinger /* 3905c66ac9dbSNicholas Bellinger * From spc4r17 6.3.15: 3906c66ac9dbSNicholas Bellinger * 3907c66ac9dbSNicholas Bellinger * If the ALL_TG_PT bit set to zero, the RELATIVE TARGET PORT 3908c66ac9dbSNicholas Bellinger * IDENTIFIER field contains the relative port identifier (see 3909c66ac9dbSNicholas Bellinger * 3.1.120) of the target port that is part of the I_T nexus 3910c66ac9dbSNicholas Bellinger * described by this full status descriptor. If the ALL_TG_PT 3911c66ac9dbSNicholas Bellinger * bit is set to one, the contents of the RELATIVE TARGET PORT 3912c66ac9dbSNicholas Bellinger * IDENTIFIER field are not defined by this standard. 3913c66ac9dbSNicholas Bellinger */ 39146708bb27SAndy Grover if (!pr_reg->pr_reg_all_tg_pt) { 3915c66ac9dbSNicholas Bellinger struct se_port *port = pr_reg->pr_reg_tg_pt_lun->lun_sep; 3916c66ac9dbSNicholas Bellinger 3917c66ac9dbSNicholas Bellinger buf[off++] = ((port->sep_rtpi >> 8) & 0xff); 3918c66ac9dbSNicholas Bellinger buf[off++] = (port->sep_rtpi & 0xff); 3919c66ac9dbSNicholas Bellinger } else 392035d1efe8SMasanari Iida off += 2; /* Skip over RELATIVE TARGET PORT IDENTIFIER */ 3921c66ac9dbSNicholas Bellinger 3922c66ac9dbSNicholas Bellinger /* 3923c66ac9dbSNicholas Bellinger * Now, have the $FABRIC_MOD fill in the protocol identifier 3924c66ac9dbSNicholas Bellinger */ 3925e3d6f909SAndy Grover desc_len = se_tpg->se_tpg_tfo->tpg_get_pr_transport_id(se_tpg, 3926c66ac9dbSNicholas Bellinger se_nacl, pr_reg, &format_code, &buf[off+4]); 3927c66ac9dbSNicholas Bellinger 3928c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 392933940d09SJoern Engel atomic_dec_mb(&pr_reg->pr_res_holders); 3930c66ac9dbSNicholas Bellinger /* 3931c66ac9dbSNicholas Bellinger * Set the ADDITIONAL DESCRIPTOR LENGTH 3932c66ac9dbSNicholas Bellinger */ 3933c66ac9dbSNicholas Bellinger buf[off++] = ((desc_len >> 24) & 0xff); 3934c66ac9dbSNicholas Bellinger buf[off++] = ((desc_len >> 16) & 0xff); 3935c66ac9dbSNicholas Bellinger buf[off++] = ((desc_len >> 8) & 0xff); 3936c66ac9dbSNicholas Bellinger buf[off++] = (desc_len & 0xff); 3937c66ac9dbSNicholas Bellinger /* 3938c66ac9dbSNicholas Bellinger * Size of full desctipor header minus TransportID 3939c66ac9dbSNicholas Bellinger * containing $FABRIC_MOD specific) initiator device/port 3940c66ac9dbSNicholas Bellinger * WWN information. 3941c66ac9dbSNicholas Bellinger * 3942c66ac9dbSNicholas Bellinger * See spc4r17 Section 6.13.5 Table 169 3943c66ac9dbSNicholas Bellinger */ 3944c66ac9dbSNicholas Bellinger add_desc_len = (24 + desc_len); 3945c66ac9dbSNicholas Bellinger 3946c66ac9dbSNicholas Bellinger off += desc_len; 3947c66ac9dbSNicholas Bellinger add_len += add_desc_len; 3948c66ac9dbSNicholas Bellinger } 3949c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 3950c66ac9dbSNicholas Bellinger /* 3951c66ac9dbSNicholas Bellinger * Set ADDITIONAL_LENGTH 3952c66ac9dbSNicholas Bellinger */ 3953c66ac9dbSNicholas Bellinger buf[4] = ((add_len >> 24) & 0xff); 3954c66ac9dbSNicholas Bellinger buf[5] = ((add_len >> 16) & 0xff); 3955c66ac9dbSNicholas Bellinger buf[6] = ((add_len >> 8) & 0xff); 3956c66ac9dbSNicholas Bellinger buf[7] = (add_len & 0xff); 3957c66ac9dbSNicholas Bellinger 39584949314cSAndy Grover transport_kunmap_data_sg(cmd); 395905d1c7c0SAndy Grover 3960c66ac9dbSNicholas Bellinger return 0; 3961c66ac9dbSNicholas Bellinger } 3962c66ac9dbSNicholas Bellinger 3963de103c93SChristoph Hellwig sense_reason_t 3964de103c93SChristoph Hellwig target_scsi3_emulate_pr_in(struct se_cmd *cmd) 3965c66ac9dbSNicholas Bellinger { 3966de103c93SChristoph Hellwig sense_reason_t ret; 3967e76a35d6SChristoph Hellwig 3968617c0e06SChristoph Hellwig /* 3969617c0e06SChristoph Hellwig * Following spc2r20 5.5.1 Reservations overview: 3970617c0e06SChristoph Hellwig * 3971617c0e06SChristoph Hellwig * If a logical unit has been reserved by any RESERVE command and is 3972617c0e06SChristoph Hellwig * still reserved by any initiator, all PERSISTENT RESERVE IN and all 3973617c0e06SChristoph Hellwig * PERSISTENT RESERVE OUT commands shall conflict regardless of 3974617c0e06SChristoph Hellwig * initiator or service action and shall terminate with a RESERVATION 3975617c0e06SChristoph Hellwig * CONFLICT status. 3976617c0e06SChristoph Hellwig */ 39770fd97ccfSChristoph Hellwig if (cmd->se_dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) { 3978617c0e06SChristoph Hellwig pr_err("Received PERSISTENT_RESERVE CDB while legacy" 3979617c0e06SChristoph Hellwig " SPC-2 reservation is held, returning" 3980617c0e06SChristoph Hellwig " RESERVATION_CONFLICT\n"); 3981de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 3982617c0e06SChristoph Hellwig } 3983617c0e06SChristoph Hellwig 3984617c0e06SChristoph Hellwig switch (cmd->t_task_cdb[1] & 0x1f) { 3985c66ac9dbSNicholas Bellinger case PRI_READ_KEYS: 3986d29a5b6aSChristoph Hellwig ret = core_scsi3_pri_read_keys(cmd); 3987d29a5b6aSChristoph Hellwig break; 3988c66ac9dbSNicholas Bellinger case PRI_READ_RESERVATION: 3989d29a5b6aSChristoph Hellwig ret = core_scsi3_pri_read_reservation(cmd); 3990d29a5b6aSChristoph Hellwig break; 3991c66ac9dbSNicholas Bellinger case PRI_REPORT_CAPABILITIES: 3992d29a5b6aSChristoph Hellwig ret = core_scsi3_pri_report_capabilities(cmd); 3993d29a5b6aSChristoph Hellwig break; 3994c66ac9dbSNicholas Bellinger case PRI_READ_FULL_STATUS: 3995d29a5b6aSChristoph Hellwig ret = core_scsi3_pri_read_full_status(cmd); 3996d29a5b6aSChristoph Hellwig break; 3997c66ac9dbSNicholas Bellinger default: 39986708bb27SAndy Grover pr_err("Unknown PERSISTENT_RESERVE_IN service" 3999617c0e06SChristoph Hellwig " action: 0x%02x\n", cmd->t_task_cdb[1] & 0x1f); 4000de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 4001c66ac9dbSNicholas Bellinger } 4002d29a5b6aSChristoph Hellwig 40036bb35e00SChristoph Hellwig if (!ret) 40046bb35e00SChristoph Hellwig target_complete_cmd(cmd, GOOD); 4005d29a5b6aSChristoph Hellwig return ret; 4006c66ac9dbSNicholas Bellinger } 4007c66ac9dbSNicholas Bellinger 4008de103c93SChristoph Hellwig sense_reason_t 4009de103c93SChristoph Hellwig target_check_reservation(struct se_cmd *cmd) 4010c66ac9dbSNicholas Bellinger { 4011d977f437SChristoph Hellwig struct se_device *dev = cmd->se_dev; 4012de103c93SChristoph Hellwig sense_reason_t ret; 4013d977f437SChristoph Hellwig 4014d977f437SChristoph Hellwig if (!cmd->se_sess) 4015c66ac9dbSNicholas Bellinger return 0; 4016d977f437SChristoph Hellwig if (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE) 4017c66ac9dbSNicholas Bellinger return 0; 4018d977f437SChristoph Hellwig if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) 4019d977f437SChristoph Hellwig return 0; 4020c66ac9dbSNicholas Bellinger 4021d977f437SChristoph Hellwig spin_lock(&dev->dev_reservation_lock); 4022d977f437SChristoph Hellwig if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 4023d977f437SChristoph Hellwig ret = target_scsi2_reservation_check(cmd); 4024d977f437SChristoph Hellwig else 4025d977f437SChristoph Hellwig ret = target_scsi3_pr_reservation_check(cmd); 4026d977f437SChristoph Hellwig spin_unlock(&dev->dev_reservation_lock); 40270fd97ccfSChristoph Hellwig 4028d977f437SChristoph Hellwig return ret; 4029c66ac9dbSNicholas Bellinger } 4030