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 * 7c66ac9dbSNicholas Bellinger * Copyright (c) 2009, 2010 Rising Tide Systems 8c66ac9dbSNicholas Bellinger * Copyright (c) 2009, 2010 Linux-iSCSI.org 9c66ac9dbSNicholas Bellinger * 10c66ac9dbSNicholas Bellinger * Nicholas A. Bellinger <nab@kernel.org> 11c66ac9dbSNicholas Bellinger * 12c66ac9dbSNicholas Bellinger * This program is free software; you can redistribute it and/or modify 13c66ac9dbSNicholas Bellinger * it under the terms of the GNU General Public License as published by 14c66ac9dbSNicholas Bellinger * the Free Software Foundation; either version 2 of the License, or 15c66ac9dbSNicholas Bellinger * (at your option) any later version. 16c66ac9dbSNicholas Bellinger * 17c66ac9dbSNicholas Bellinger * This program is distributed in the hope that it will be useful, 18c66ac9dbSNicholas Bellinger * but WITHOUT ANY WARRANTY; without even the implied warranty of 19c66ac9dbSNicholas Bellinger * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20c66ac9dbSNicholas Bellinger * GNU General Public License for more details. 21c66ac9dbSNicholas Bellinger * 22c66ac9dbSNicholas Bellinger * You should have received a copy of the GNU General Public License 23c66ac9dbSNicholas Bellinger * along with this program; if not, write to the Free Software 24c66ac9dbSNicholas Bellinger * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 25c66ac9dbSNicholas Bellinger * 26c66ac9dbSNicholas Bellinger ******************************************************************************/ 27c66ac9dbSNicholas Bellinger 28c66ac9dbSNicholas Bellinger #include <linux/slab.h> 29c66ac9dbSNicholas Bellinger #include <linux/spinlock.h> 30c66ac9dbSNicholas Bellinger #include <linux/list.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 56c66ac9dbSNicholas Bellinger int 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) 62c66ac9dbSNicholas Bellinger return 0; 63c66ac9dbSNicholas Bellinger 64c66ac9dbSNicholas Bellinger snprintf(buf, size, ",i,0x%s", &pr_reg->pr_reg_isid[0]); 65c66ac9dbSNicholas Bellinger return 1; 66c66ac9dbSNicholas Bellinger } 67c66ac9dbSNicholas Bellinger 68c66ac9dbSNicholas Bellinger static void __core_scsi3_complete_pro_release(struct se_device *, struct se_node_acl *, 69c66ac9dbSNicholas Bellinger struct t10_pr_registration *, int); 70c66ac9dbSNicholas Bellinger 71c66ac9dbSNicholas Bellinger static int core_scsi2_reservation_seq_non_holder( 72c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 73c66ac9dbSNicholas Bellinger unsigned char *cdb, 74c66ac9dbSNicholas Bellinger u32 pr_reg_type) 75c66ac9dbSNicholas Bellinger { 76c66ac9dbSNicholas Bellinger switch (cdb[0]) { 77c66ac9dbSNicholas Bellinger case INQUIRY: 78c66ac9dbSNicholas Bellinger case RELEASE: 79c66ac9dbSNicholas Bellinger case RELEASE_10: 80c66ac9dbSNicholas Bellinger return 0; 81c66ac9dbSNicholas Bellinger default: 82c66ac9dbSNicholas Bellinger return 1; 83c66ac9dbSNicholas Bellinger } 84c66ac9dbSNicholas Bellinger 85c66ac9dbSNicholas Bellinger return 1; 86c66ac9dbSNicholas Bellinger } 87c66ac9dbSNicholas Bellinger 88c66ac9dbSNicholas Bellinger static int core_scsi2_reservation_check(struct se_cmd *cmd, u32 *pr_reg_type) 89c66ac9dbSNicholas Bellinger { 90c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 91c66ac9dbSNicholas Bellinger struct se_session *sess = cmd->se_sess; 92c66ac9dbSNicholas Bellinger int ret; 93c66ac9dbSNicholas Bellinger 946708bb27SAndy Grover if (!sess) 95c66ac9dbSNicholas Bellinger return 0; 96c66ac9dbSNicholas Bellinger 97c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 98c66ac9dbSNicholas Bellinger if (!dev->dev_reserved_node_acl || !sess) { 99c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 100c66ac9dbSNicholas Bellinger return 0; 101c66ac9dbSNicholas Bellinger } 102c66ac9dbSNicholas Bellinger if (dev->dev_reserved_node_acl != sess->se_node_acl) { 103c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 104e3d6f909SAndy Grover return -EINVAL; 105c66ac9dbSNicholas Bellinger } 1060fd97ccfSChristoph Hellwig if (!(dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS_WITH_ISID)) { 107c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 108c66ac9dbSNicholas Bellinger return 0; 109c66ac9dbSNicholas Bellinger } 110e3d6f909SAndy Grover ret = (dev->dev_res_bin_isid == sess->sess_bin_isid) ? 0 : -EINVAL; 111c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 112c66ac9dbSNicholas Bellinger 113c66ac9dbSNicholas Bellinger return ret; 114c66ac9dbSNicholas Bellinger } 115c66ac9dbSNicholas Bellinger 116eacac00cSChristoph Hellwig static struct t10_pr_registration *core_scsi3_locate_pr_reg(struct se_device *, 117eacac00cSChristoph Hellwig struct se_node_acl *, struct se_session *); 118eacac00cSChristoph Hellwig static void core_scsi3_put_pr_reg(struct t10_pr_registration *); 119eacac00cSChristoph Hellwig 120087a03b3SNicholas Bellinger static int target_check_scsi2_reservation_conflict(struct se_cmd *cmd) 121eacac00cSChristoph Hellwig { 122eacac00cSChristoph Hellwig struct se_session *se_sess = cmd->se_sess; 1230fd97ccfSChristoph Hellwig struct se_device *dev = cmd->se_dev; 124eacac00cSChristoph Hellwig struct t10_pr_registration *pr_reg; 1250fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 1260fd97ccfSChristoph Hellwig int crh = (dev->t10_pr.res_type == SPC3_PERSISTENT_RESERVATIONS); 127eacac00cSChristoph Hellwig int conflict = 0; 128eacac00cSChristoph Hellwig 129eacac00cSChristoph Hellwig if (!crh) 130087a03b3SNicholas Bellinger return -EINVAL; 131eacac00cSChristoph Hellwig 132eacac00cSChristoph Hellwig pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, 133eacac00cSChristoph Hellwig se_sess); 134eacac00cSChristoph Hellwig if (pr_reg) { 135eacac00cSChristoph Hellwig /* 136eacac00cSChristoph Hellwig * From spc4r17 5.7.3 Exceptions to SPC-2 RESERVE and RELEASE 137eacac00cSChristoph Hellwig * behavior 138eacac00cSChristoph Hellwig * 139eacac00cSChristoph Hellwig * A RESERVE(6) or RESERVE(10) command shall complete with GOOD 140eacac00cSChristoph Hellwig * status, but no reservation shall be established and the 141eacac00cSChristoph Hellwig * persistent reservation shall not be changed, if the command 142eacac00cSChristoph Hellwig * is received from a) and b) below. 143eacac00cSChristoph Hellwig * 144eacac00cSChristoph Hellwig * A RELEASE(6) or RELEASE(10) command shall complete with GOOD 145eacac00cSChristoph Hellwig * status, but the persistent reservation shall not be released, 146eacac00cSChristoph Hellwig * if the command is received from a) and b) 147eacac00cSChristoph Hellwig * 148eacac00cSChristoph Hellwig * a) An I_T nexus that is a persistent reservation holder; or 149eacac00cSChristoph Hellwig * b) An I_T nexus that is registered if a registrants only or 150eacac00cSChristoph Hellwig * all registrants type persistent reservation is present. 151eacac00cSChristoph Hellwig * 152eacac00cSChristoph Hellwig * In all other cases, a RESERVE(6) command, RESERVE(10) command, 153eacac00cSChristoph Hellwig * RELEASE(6) command, or RELEASE(10) command shall be processed 154eacac00cSChristoph Hellwig * as defined in SPC-2. 155eacac00cSChristoph Hellwig */ 156eacac00cSChristoph Hellwig if (pr_reg->pr_res_holder) { 157eacac00cSChristoph Hellwig core_scsi3_put_pr_reg(pr_reg); 158087a03b3SNicholas Bellinger return 1; 159eacac00cSChristoph Hellwig } 160eacac00cSChristoph Hellwig if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY) || 161eacac00cSChristoph Hellwig (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) || 162eacac00cSChristoph Hellwig (pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 163eacac00cSChristoph Hellwig (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { 164eacac00cSChristoph Hellwig core_scsi3_put_pr_reg(pr_reg); 165087a03b3SNicholas Bellinger return 1; 166eacac00cSChristoph Hellwig } 167eacac00cSChristoph Hellwig core_scsi3_put_pr_reg(pr_reg); 168eacac00cSChristoph Hellwig conflict = 1; 169eacac00cSChristoph Hellwig } else { 170eacac00cSChristoph Hellwig /* 171eacac00cSChristoph Hellwig * Following spc2r20 5.5.1 Reservations overview: 172eacac00cSChristoph Hellwig * 173eacac00cSChristoph Hellwig * If a logical unit has executed a PERSISTENT RESERVE OUT 174eacac00cSChristoph Hellwig * command with the REGISTER or the REGISTER AND IGNORE 175eacac00cSChristoph Hellwig * EXISTING KEY service action and is still registered by any 176eacac00cSChristoph Hellwig * initiator, all RESERVE commands and all RELEASE commands 177eacac00cSChristoph Hellwig * regardless of initiator shall conflict and shall terminate 178eacac00cSChristoph Hellwig * with a RESERVATION CONFLICT status. 179eacac00cSChristoph Hellwig */ 180eacac00cSChristoph Hellwig spin_lock(&pr_tmpl->registration_lock); 181eacac00cSChristoph Hellwig conflict = (list_empty(&pr_tmpl->registration_list)) ? 0 : 1; 182eacac00cSChristoph Hellwig spin_unlock(&pr_tmpl->registration_lock); 183eacac00cSChristoph Hellwig } 184eacac00cSChristoph Hellwig 185eacac00cSChristoph Hellwig if (conflict) { 186eacac00cSChristoph Hellwig pr_err("Received legacy SPC-2 RESERVE/RELEASE" 187eacac00cSChristoph Hellwig " while active SPC-3 registrations exist," 188eacac00cSChristoph Hellwig " returning RESERVATION_CONFLICT\n"); 18903e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 190087a03b3SNicholas Bellinger return -EBUSY; 191eacac00cSChristoph Hellwig } 192eacac00cSChristoph Hellwig 193087a03b3SNicholas Bellinger return 0; 194eacac00cSChristoph Hellwig } 195eacac00cSChristoph Hellwig 1966bb35e00SChristoph Hellwig int target_scsi2_reservation_release(struct se_cmd *cmd) 197c66ac9dbSNicholas Bellinger { 198c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 199c66ac9dbSNicholas Bellinger struct se_session *sess = cmd->se_sess; 200609234e3SWei Yongjun struct se_portal_group *tpg; 201087a03b3SNicholas Bellinger int ret = 0, rc; 202c66ac9dbSNicholas Bellinger 203609234e3SWei Yongjun if (!sess || !sess->se_tpg) 204d29a5b6aSChristoph Hellwig goto out; 205087a03b3SNicholas Bellinger rc = target_check_scsi2_reservation_conflict(cmd); 206087a03b3SNicholas Bellinger if (rc == 1) 207d29a5b6aSChristoph Hellwig goto out; 208087a03b3SNicholas Bellinger else if (rc < 0) { 209087a03b3SNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 210087a03b3SNicholas Bellinger ret = -EINVAL; 211087a03b3SNicholas Bellinger goto out; 212087a03b3SNicholas Bellinger } 213c66ac9dbSNicholas Bellinger 214d29a5b6aSChristoph Hellwig ret = 0; 215c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 216d29a5b6aSChristoph Hellwig if (!dev->dev_reserved_node_acl || !sess) 217d29a5b6aSChristoph Hellwig goto out_unlock; 218c66ac9dbSNicholas Bellinger 219d29a5b6aSChristoph Hellwig if (dev->dev_reserved_node_acl != sess->se_node_acl) 220d29a5b6aSChristoph Hellwig goto out_unlock; 221d29a5b6aSChristoph Hellwig 222edc318d9SBernhard Kohl if (dev->dev_res_bin_isid != sess->sess_bin_isid) 223edc318d9SBernhard Kohl goto out_unlock; 224edc318d9SBernhard Kohl 225c66ac9dbSNicholas Bellinger dev->dev_reserved_node_acl = NULL; 2260fd97ccfSChristoph Hellwig dev->dev_reservation_flags &= ~DRF_SPC2_RESERVATIONS; 2270fd97ccfSChristoph Hellwig if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS_WITH_ISID) { 228c66ac9dbSNicholas Bellinger dev->dev_res_bin_isid = 0; 2290fd97ccfSChristoph Hellwig dev->dev_reservation_flags &= ~DRF_SPC2_RESERVATIONS_WITH_ISID; 230c66ac9dbSNicholas Bellinger } 231609234e3SWei Yongjun tpg = sess->se_tpg; 2326708bb27SAndy Grover pr_debug("SCSI-2 Released reservation for %s LUN: %u ->" 233e3d6f909SAndy Grover " MAPPED LUN: %u for %s\n", tpg->se_tpg_tfo->get_fabric_name(), 234e3d6f909SAndy Grover cmd->se_lun->unpacked_lun, cmd->se_deve->mapped_lun, 235c66ac9dbSNicholas Bellinger sess->se_node_acl->initiatorname); 236c66ac9dbSNicholas Bellinger 237d29a5b6aSChristoph Hellwig out_unlock: 238d29a5b6aSChristoph Hellwig spin_unlock(&dev->dev_reservation_lock); 239d29a5b6aSChristoph Hellwig out: 2406bb35e00SChristoph Hellwig if (!ret) 2416bb35e00SChristoph Hellwig target_complete_cmd(cmd, GOOD); 242d29a5b6aSChristoph Hellwig return ret; 243c66ac9dbSNicholas Bellinger } 244c66ac9dbSNicholas Bellinger 2456bb35e00SChristoph Hellwig int target_scsi2_reservation_reserve(struct se_cmd *cmd) 246c66ac9dbSNicholas Bellinger { 247c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 248c66ac9dbSNicholas Bellinger struct se_session *sess = cmd->se_sess; 249609234e3SWei Yongjun struct se_portal_group *tpg; 250087a03b3SNicholas Bellinger int ret = 0, rc; 251c66ac9dbSNicholas Bellinger 252a1d8b49aSAndy Grover if ((cmd->t_task_cdb[1] & 0x01) && 253a1d8b49aSAndy Grover (cmd->t_task_cdb[1] & 0x02)) { 2546708bb27SAndy Grover pr_err("LongIO and Obselete Bits set, returning" 255c66ac9dbSNicholas Bellinger " ILLEGAL_REQUEST\n"); 25603e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; 25703e98c9eSNicholas Bellinger ret = -EINVAL; 258d29a5b6aSChristoph Hellwig goto out; 259c66ac9dbSNicholas Bellinger } 260c66ac9dbSNicholas Bellinger /* 261c66ac9dbSNicholas Bellinger * This is currently the case for target_core_mod passthrough struct se_cmd 262c66ac9dbSNicholas Bellinger * ops 263c66ac9dbSNicholas Bellinger */ 264609234e3SWei Yongjun if (!sess || !sess->se_tpg) 265d29a5b6aSChristoph Hellwig goto out; 266087a03b3SNicholas Bellinger rc = target_check_scsi2_reservation_conflict(cmd); 267087a03b3SNicholas Bellinger if (rc == 1) 268d29a5b6aSChristoph Hellwig goto out; 269087a03b3SNicholas Bellinger else if (rc < 0) { 270087a03b3SNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 271087a03b3SNicholas Bellinger ret = -EINVAL; 272087a03b3SNicholas Bellinger goto out; 273087a03b3SNicholas Bellinger } 274c66ac9dbSNicholas Bellinger 275d29a5b6aSChristoph Hellwig ret = 0; 276609234e3SWei Yongjun tpg = sess->se_tpg; 277c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 278c66ac9dbSNicholas Bellinger if (dev->dev_reserved_node_acl && 279c66ac9dbSNicholas Bellinger (dev->dev_reserved_node_acl != sess->se_node_acl)) { 2806708bb27SAndy Grover pr_err("SCSI-2 RESERVATION CONFLIFT for %s fabric\n", 281e3d6f909SAndy Grover tpg->se_tpg_tfo->get_fabric_name()); 2826708bb27SAndy Grover pr_err("Original reserver LUN: %u %s\n", 283e3d6f909SAndy Grover cmd->se_lun->unpacked_lun, 284c66ac9dbSNicholas Bellinger dev->dev_reserved_node_acl->initiatorname); 2856708bb27SAndy Grover pr_err("Current attempt - LUN: %u -> MAPPED LUN: %u" 286e3d6f909SAndy Grover " from %s \n", cmd->se_lun->unpacked_lun, 287c66ac9dbSNicholas Bellinger cmd->se_deve->mapped_lun, 288c66ac9dbSNicholas Bellinger sess->se_node_acl->initiatorname); 28903e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 29003e98c9eSNicholas Bellinger ret = -EINVAL; 291d29a5b6aSChristoph Hellwig goto out_unlock; 292c66ac9dbSNicholas Bellinger } 293c66ac9dbSNicholas Bellinger 294c66ac9dbSNicholas Bellinger dev->dev_reserved_node_acl = sess->se_node_acl; 2950fd97ccfSChristoph Hellwig dev->dev_reservation_flags |= DRF_SPC2_RESERVATIONS; 296c66ac9dbSNicholas Bellinger if (sess->sess_bin_isid != 0) { 297c66ac9dbSNicholas Bellinger dev->dev_res_bin_isid = sess->sess_bin_isid; 2980fd97ccfSChristoph Hellwig dev->dev_reservation_flags |= DRF_SPC2_RESERVATIONS_WITH_ISID; 299c66ac9dbSNicholas Bellinger } 3006708bb27SAndy Grover pr_debug("SCSI-2 Reserved %s LUN: %u -> MAPPED LUN: %u" 301e3d6f909SAndy Grover " for %s\n", tpg->se_tpg_tfo->get_fabric_name(), 302e3d6f909SAndy Grover cmd->se_lun->unpacked_lun, cmd->se_deve->mapped_lun, 303c66ac9dbSNicholas Bellinger sess->se_node_acl->initiatorname); 304c66ac9dbSNicholas Bellinger 305d29a5b6aSChristoph Hellwig out_unlock: 306d29a5b6aSChristoph Hellwig spin_unlock(&dev->dev_reservation_lock); 307d29a5b6aSChristoph Hellwig out: 3086bb35e00SChristoph Hellwig if (!ret) 3096bb35e00SChristoph Hellwig target_complete_cmd(cmd, GOOD); 310d29a5b6aSChristoph Hellwig return ret; 311c66ac9dbSNicholas Bellinger } 312c66ac9dbSNicholas Bellinger 313c66ac9dbSNicholas Bellinger 314c66ac9dbSNicholas Bellinger /* 315c66ac9dbSNicholas Bellinger * Begin SPC-3/SPC-4 Persistent Reservations emulation support 316c66ac9dbSNicholas Bellinger * 317c66ac9dbSNicholas Bellinger * This function is called by those initiator ports who are *NOT* 318c66ac9dbSNicholas Bellinger * the active PR reservation holder when a reservation is present. 319c66ac9dbSNicholas Bellinger */ 320c66ac9dbSNicholas Bellinger static int core_scsi3_pr_seq_non_holder( 321c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 322c66ac9dbSNicholas Bellinger unsigned char *cdb, 323c66ac9dbSNicholas Bellinger u32 pr_reg_type) 324c66ac9dbSNicholas Bellinger { 325c66ac9dbSNicholas Bellinger struct se_dev_entry *se_deve; 326e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 327c66ac9dbSNicholas Bellinger int other_cdb = 0, ignore_reg; 328c66ac9dbSNicholas Bellinger int registered_nexus = 0, ret = 1; /* Conflict by default */ 329c66ac9dbSNicholas Bellinger int all_reg = 0, reg_only = 0; /* ALL_REG, REG_ONLY */ 330c66ac9dbSNicholas Bellinger int we = 0; /* Write Exclusive */ 331c66ac9dbSNicholas Bellinger int legacy = 0; /* Act like a legacy device and return 332c66ac9dbSNicholas Bellinger * RESERVATION CONFLICT on some CDBs */ 333c66ac9dbSNicholas Bellinger /* 334c66ac9dbSNicholas Bellinger * A legacy SPC-2 reservation is being held. 335c66ac9dbSNicholas Bellinger */ 3360fd97ccfSChristoph Hellwig if (cmd->se_dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 337c66ac9dbSNicholas Bellinger return core_scsi2_reservation_seq_non_holder(cmd, 338c66ac9dbSNicholas Bellinger cdb, pr_reg_type); 339c66ac9dbSNicholas Bellinger 340f2083241SJörn Engel se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; 341c66ac9dbSNicholas Bellinger /* 342c66ac9dbSNicholas Bellinger * Determine if the registration should be ignored due to 343c66ac9dbSNicholas Bellinger * non-matching ISIDs in core_scsi3_pr_reservation_check(). 344c66ac9dbSNicholas Bellinger */ 345c66ac9dbSNicholas Bellinger ignore_reg = (pr_reg_type & 0x80000000); 346c66ac9dbSNicholas Bellinger if (ignore_reg) 347c66ac9dbSNicholas Bellinger pr_reg_type &= ~0x80000000; 348c66ac9dbSNicholas Bellinger 349c66ac9dbSNicholas Bellinger switch (pr_reg_type) { 350c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE: 351c66ac9dbSNicholas Bellinger we = 1; 352c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS: 353c66ac9dbSNicholas Bellinger /* 354c66ac9dbSNicholas Bellinger * Some commands are only allowed for the persistent reservation 355c66ac9dbSNicholas Bellinger * holder. 356c66ac9dbSNicholas Bellinger */ 357c66ac9dbSNicholas Bellinger if ((se_deve->def_pr_registered) && !(ignore_reg)) 358c66ac9dbSNicholas Bellinger registered_nexus = 1; 359c66ac9dbSNicholas Bellinger break; 360c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: 361c66ac9dbSNicholas Bellinger we = 1; 362c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: 363c66ac9dbSNicholas Bellinger /* 364c66ac9dbSNicholas Bellinger * Some commands are only allowed for registered I_T Nexuses. 365c66ac9dbSNicholas Bellinger */ 366c66ac9dbSNicholas Bellinger reg_only = 1; 367c66ac9dbSNicholas Bellinger if ((se_deve->def_pr_registered) && !(ignore_reg)) 368c66ac9dbSNicholas Bellinger registered_nexus = 1; 369c66ac9dbSNicholas Bellinger break; 370c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: 371c66ac9dbSNicholas Bellinger we = 1; 372c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: 373c66ac9dbSNicholas Bellinger /* 374c66ac9dbSNicholas Bellinger * Each registered I_T Nexus is a reservation holder. 375c66ac9dbSNicholas Bellinger */ 376c66ac9dbSNicholas Bellinger all_reg = 1; 377c66ac9dbSNicholas Bellinger if ((se_deve->def_pr_registered) && !(ignore_reg)) 378c66ac9dbSNicholas Bellinger registered_nexus = 1; 379c66ac9dbSNicholas Bellinger break; 380c66ac9dbSNicholas Bellinger default: 381e3d6f909SAndy Grover return -EINVAL; 382c66ac9dbSNicholas Bellinger } 383c66ac9dbSNicholas Bellinger /* 384c66ac9dbSNicholas Bellinger * Referenced from spc4r17 table 45 for *NON* PR holder access 385c66ac9dbSNicholas Bellinger */ 386c66ac9dbSNicholas Bellinger switch (cdb[0]) { 387c66ac9dbSNicholas Bellinger case SECURITY_PROTOCOL_IN: 388c66ac9dbSNicholas Bellinger if (registered_nexus) 389c66ac9dbSNicholas Bellinger return 0; 390c66ac9dbSNicholas Bellinger ret = (we) ? 0 : 1; 391c66ac9dbSNicholas Bellinger break; 392c66ac9dbSNicholas Bellinger case MODE_SENSE: 393c66ac9dbSNicholas Bellinger case MODE_SENSE_10: 394c66ac9dbSNicholas Bellinger case READ_ATTRIBUTE: 395c66ac9dbSNicholas Bellinger case READ_BUFFER: 396c66ac9dbSNicholas Bellinger case RECEIVE_DIAGNOSTIC: 397c66ac9dbSNicholas Bellinger if (legacy) { 398c66ac9dbSNicholas Bellinger ret = 1; 399c66ac9dbSNicholas Bellinger break; 400c66ac9dbSNicholas Bellinger } 401c66ac9dbSNicholas Bellinger if (registered_nexus) { 402c66ac9dbSNicholas Bellinger ret = 0; 403c66ac9dbSNicholas Bellinger break; 404c66ac9dbSNicholas Bellinger } 405c66ac9dbSNicholas Bellinger ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ 406c66ac9dbSNicholas Bellinger break; 407c66ac9dbSNicholas Bellinger case PERSISTENT_RESERVE_OUT: 408c66ac9dbSNicholas Bellinger /* 409c66ac9dbSNicholas Bellinger * This follows PERSISTENT_RESERVE_OUT service actions that 410c66ac9dbSNicholas Bellinger * are allowed in the presence of various reservations. 411c66ac9dbSNicholas Bellinger * See spc4r17, table 46 412c66ac9dbSNicholas Bellinger */ 413c66ac9dbSNicholas Bellinger switch (cdb[1] & 0x1f) { 414c66ac9dbSNicholas Bellinger case PRO_CLEAR: 415c66ac9dbSNicholas Bellinger case PRO_PREEMPT: 416c66ac9dbSNicholas Bellinger case PRO_PREEMPT_AND_ABORT: 417c66ac9dbSNicholas Bellinger ret = (registered_nexus) ? 0 : 1; 418c66ac9dbSNicholas Bellinger break; 419c66ac9dbSNicholas Bellinger case PRO_REGISTER: 420c66ac9dbSNicholas Bellinger case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: 421c66ac9dbSNicholas Bellinger ret = 0; 422c66ac9dbSNicholas Bellinger break; 423c66ac9dbSNicholas Bellinger case PRO_REGISTER_AND_MOVE: 424c66ac9dbSNicholas Bellinger case PRO_RESERVE: 425c66ac9dbSNicholas Bellinger ret = 1; 426c66ac9dbSNicholas Bellinger break; 427c66ac9dbSNicholas Bellinger case PRO_RELEASE: 428c66ac9dbSNicholas Bellinger ret = (registered_nexus) ? 0 : 1; 429c66ac9dbSNicholas Bellinger break; 430c66ac9dbSNicholas Bellinger default: 4316708bb27SAndy Grover pr_err("Unknown PERSISTENT_RESERVE_OUT service" 432c66ac9dbSNicholas Bellinger " action: 0x%02x\n", cdb[1] & 0x1f); 433e3d6f909SAndy Grover return -EINVAL; 434c66ac9dbSNicholas Bellinger } 435c66ac9dbSNicholas Bellinger break; 436c66ac9dbSNicholas Bellinger case RELEASE: 437c66ac9dbSNicholas Bellinger case RELEASE_10: 438eacac00cSChristoph Hellwig /* Handled by CRH=1 in target_scsi2_reservation_release() */ 439c66ac9dbSNicholas Bellinger ret = 0; 440c66ac9dbSNicholas Bellinger break; 441c66ac9dbSNicholas Bellinger case RESERVE: 442c66ac9dbSNicholas Bellinger case RESERVE_10: 443eacac00cSChristoph Hellwig /* Handled by CRH=1 in target_scsi2_reservation_reserve() */ 444c66ac9dbSNicholas Bellinger ret = 0; 445c66ac9dbSNicholas Bellinger break; 446c66ac9dbSNicholas Bellinger case TEST_UNIT_READY: 447c66ac9dbSNicholas Bellinger ret = (legacy) ? 1 : 0; /* Conflict for legacy */ 448c66ac9dbSNicholas Bellinger break; 449c66ac9dbSNicholas Bellinger case MAINTENANCE_IN: 450c66ac9dbSNicholas Bellinger switch (cdb[1] & 0x1f) { 451c66ac9dbSNicholas Bellinger case MI_MANAGEMENT_PROTOCOL_IN: 452c66ac9dbSNicholas Bellinger if (registered_nexus) { 453c66ac9dbSNicholas Bellinger ret = 0; 454c66ac9dbSNicholas Bellinger break; 455c66ac9dbSNicholas Bellinger } 456c66ac9dbSNicholas Bellinger ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ 457c66ac9dbSNicholas Bellinger break; 458c66ac9dbSNicholas Bellinger case MI_REPORT_SUPPORTED_OPERATION_CODES: 459c66ac9dbSNicholas Bellinger case MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS: 460c66ac9dbSNicholas Bellinger if (legacy) { 461c66ac9dbSNicholas Bellinger ret = 1; 462c66ac9dbSNicholas Bellinger break; 463c66ac9dbSNicholas Bellinger } 464c66ac9dbSNicholas Bellinger if (registered_nexus) { 465c66ac9dbSNicholas Bellinger ret = 0; 466c66ac9dbSNicholas Bellinger break; 467c66ac9dbSNicholas Bellinger } 468c66ac9dbSNicholas Bellinger ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ 469c66ac9dbSNicholas Bellinger break; 470c66ac9dbSNicholas Bellinger case MI_REPORT_ALIASES: 471c66ac9dbSNicholas Bellinger case MI_REPORT_IDENTIFYING_INFORMATION: 472c66ac9dbSNicholas Bellinger case MI_REPORT_PRIORITY: 473c66ac9dbSNicholas Bellinger case MI_REPORT_TARGET_PGS: 474c66ac9dbSNicholas Bellinger case MI_REPORT_TIMESTAMP: 475c66ac9dbSNicholas Bellinger ret = 0; /* Allowed */ 476c66ac9dbSNicholas Bellinger break; 477c66ac9dbSNicholas Bellinger default: 4786708bb27SAndy Grover pr_err("Unknown MI Service Action: 0x%02x\n", 479c66ac9dbSNicholas Bellinger (cdb[1] & 0x1f)); 480e3d6f909SAndy Grover return -EINVAL; 481c66ac9dbSNicholas Bellinger } 482c66ac9dbSNicholas Bellinger break; 483c66ac9dbSNicholas Bellinger case ACCESS_CONTROL_IN: 484c66ac9dbSNicholas Bellinger case ACCESS_CONTROL_OUT: 485c66ac9dbSNicholas Bellinger case INQUIRY: 486c66ac9dbSNicholas Bellinger case LOG_SENSE: 487c66ac9dbSNicholas Bellinger case READ_MEDIA_SERIAL_NUMBER: 488c66ac9dbSNicholas Bellinger case REPORT_LUNS: 489c66ac9dbSNicholas Bellinger case REQUEST_SENSE: 4906816966aSMarco Sanvido case PERSISTENT_RESERVE_IN: 491c66ac9dbSNicholas Bellinger ret = 0; /*/ Allowed CDBs */ 492c66ac9dbSNicholas Bellinger break; 493c66ac9dbSNicholas Bellinger default: 494c66ac9dbSNicholas Bellinger other_cdb = 1; 495c66ac9dbSNicholas Bellinger break; 496c66ac9dbSNicholas Bellinger } 497c66ac9dbSNicholas Bellinger /* 49825985edcSLucas De Marchi * Case where the CDB is explicitly allowed in the above switch 499c66ac9dbSNicholas Bellinger * statement. 500c66ac9dbSNicholas Bellinger */ 5016708bb27SAndy Grover if (!ret && !other_cdb) { 5026708bb27SAndy Grover pr_debug("Allowing explict CDB: 0x%02x for %s" 503c66ac9dbSNicholas Bellinger " reservation holder\n", cdb[0], 504c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 5058b1e1244SAndy Grover 506c66ac9dbSNicholas Bellinger return ret; 507c66ac9dbSNicholas Bellinger } 508c66ac9dbSNicholas Bellinger /* 509c66ac9dbSNicholas Bellinger * Check if write exclusive initiator ports *NOT* holding the 510c66ac9dbSNicholas Bellinger * WRITE_EXCLUSIVE_* reservation. 511c66ac9dbSNicholas Bellinger */ 512ee1b1b9cSAndy Grover if (we && !registered_nexus) { 513c66ac9dbSNicholas Bellinger if (cmd->data_direction == DMA_TO_DEVICE) { 514c66ac9dbSNicholas Bellinger /* 515c66ac9dbSNicholas Bellinger * Conflict for write exclusive 516c66ac9dbSNicholas Bellinger */ 5176708bb27SAndy Grover pr_debug("%s Conflict for unregistered nexus" 518c66ac9dbSNicholas Bellinger " %s CDB: 0x%02x to %s reservation\n", 519c66ac9dbSNicholas Bellinger transport_dump_cmd_direction(cmd), 520c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, cdb[0], 521c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 522c66ac9dbSNicholas Bellinger return 1; 523c66ac9dbSNicholas Bellinger } else { 524c66ac9dbSNicholas Bellinger /* 525c66ac9dbSNicholas Bellinger * Allow non WRITE CDBs for all Write Exclusive 526c66ac9dbSNicholas Bellinger * PR TYPEs to pass for registered and 527c66ac9dbSNicholas Bellinger * non-registered_nexuxes NOT holding the reservation. 528c66ac9dbSNicholas Bellinger * 529c66ac9dbSNicholas Bellinger * We only make noise for the unregisterd nexuses, 530c66ac9dbSNicholas Bellinger * as we expect registered non-reservation holding 531c66ac9dbSNicholas Bellinger * nexuses to issue CDBs. 532c66ac9dbSNicholas Bellinger */ 5338b1e1244SAndy Grover 5346708bb27SAndy Grover if (!registered_nexus) { 5356708bb27SAndy Grover pr_debug("Allowing implict CDB: 0x%02x" 536c66ac9dbSNicholas Bellinger " for %s reservation on unregistered" 537c66ac9dbSNicholas Bellinger " nexus\n", cdb[0], 538c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 539c66ac9dbSNicholas Bellinger } 5408b1e1244SAndy Grover 541c66ac9dbSNicholas Bellinger return 0; 542c66ac9dbSNicholas Bellinger } 543c66ac9dbSNicholas Bellinger } else if ((reg_only) || (all_reg)) { 544c66ac9dbSNicholas Bellinger if (registered_nexus) { 545c66ac9dbSNicholas Bellinger /* 546c66ac9dbSNicholas Bellinger * For PR_*_REG_ONLY and PR_*_ALL_REG reservations, 547c66ac9dbSNicholas Bellinger * allow commands from registered nexuses. 548c66ac9dbSNicholas Bellinger */ 5498b1e1244SAndy Grover 5506708bb27SAndy Grover pr_debug("Allowing implict CDB: 0x%02x for %s" 551c66ac9dbSNicholas Bellinger " reservation\n", cdb[0], 552c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 5538b1e1244SAndy Grover 554c66ac9dbSNicholas Bellinger return 0; 555c66ac9dbSNicholas Bellinger } 556c66ac9dbSNicholas Bellinger } 5576708bb27SAndy Grover pr_debug("%s Conflict for %sregistered nexus %s CDB: 0x%2x" 558c66ac9dbSNicholas Bellinger " for %s reservation\n", transport_dump_cmd_direction(cmd), 559c66ac9dbSNicholas Bellinger (registered_nexus) ? "" : "un", 560c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, cdb[0], 561c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 562c66ac9dbSNicholas Bellinger 563c66ac9dbSNicholas Bellinger return 1; /* Conflict by default */ 564c66ac9dbSNicholas Bellinger } 565c66ac9dbSNicholas Bellinger 566c66ac9dbSNicholas Bellinger static u32 core_scsi3_pr_generation(struct se_device *dev) 567c66ac9dbSNicholas Bellinger { 568c66ac9dbSNicholas Bellinger u32 prg; 5690fd97ccfSChristoph Hellwig 570c66ac9dbSNicholas Bellinger /* 571c66ac9dbSNicholas Bellinger * PRGeneration field shall contain the value of a 32-bit wrapping 572c66ac9dbSNicholas Bellinger * counter mainted by the device server. 573c66ac9dbSNicholas Bellinger * 574c66ac9dbSNicholas Bellinger * Note that this is done regardless of Active Persist across 575c66ac9dbSNicholas Bellinger * Target PowerLoss (APTPL) 576c66ac9dbSNicholas Bellinger * 577c66ac9dbSNicholas Bellinger * See spc4r17 section 6.3.12 READ_KEYS service action 578c66ac9dbSNicholas Bellinger */ 579c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 5800fd97ccfSChristoph Hellwig prg = dev->t10_pr.pr_generation++; 581c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 582c66ac9dbSNicholas Bellinger 583c66ac9dbSNicholas Bellinger return prg; 584c66ac9dbSNicholas Bellinger } 585c66ac9dbSNicholas Bellinger 586c66ac9dbSNicholas Bellinger static int core_scsi3_pr_reservation_check( 587c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 588c66ac9dbSNicholas Bellinger u32 *pr_reg_type) 589c66ac9dbSNicholas Bellinger { 590c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 591c66ac9dbSNicholas Bellinger struct se_session *sess = cmd->se_sess; 592c66ac9dbSNicholas Bellinger int ret; 593c66ac9dbSNicholas Bellinger 5946708bb27SAndy Grover if (!sess) 595c66ac9dbSNicholas Bellinger return 0; 596c66ac9dbSNicholas Bellinger /* 597c66ac9dbSNicholas Bellinger * A legacy SPC-2 reservation is being held. 598c66ac9dbSNicholas Bellinger */ 5990fd97ccfSChristoph Hellwig if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 600c66ac9dbSNicholas Bellinger return core_scsi2_reservation_check(cmd, pr_reg_type); 601c66ac9dbSNicholas Bellinger 602c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 6036708bb27SAndy Grover if (!dev->dev_pr_res_holder) { 604c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 605c66ac9dbSNicholas Bellinger return 0; 606c66ac9dbSNicholas Bellinger } 607c66ac9dbSNicholas Bellinger *pr_reg_type = dev->dev_pr_res_holder->pr_res_type; 608c66ac9dbSNicholas Bellinger cmd->pr_res_key = dev->dev_pr_res_holder->pr_res_key; 609c66ac9dbSNicholas Bellinger if (dev->dev_pr_res_holder->pr_reg_nacl != sess->se_node_acl) { 610c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 611e3d6f909SAndy Grover return -EINVAL; 612c66ac9dbSNicholas Bellinger } 6136708bb27SAndy Grover if (!dev->dev_pr_res_holder->isid_present_at_reg) { 614c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 615c66ac9dbSNicholas Bellinger return 0; 616c66ac9dbSNicholas Bellinger } 617c66ac9dbSNicholas Bellinger ret = (dev->dev_pr_res_holder->pr_reg_bin_isid == 618e3d6f909SAndy Grover sess->sess_bin_isid) ? 0 : -EINVAL; 619c66ac9dbSNicholas Bellinger /* 620c66ac9dbSNicholas Bellinger * Use bit in *pr_reg_type to notify ISID mismatch in 621c66ac9dbSNicholas Bellinger * core_scsi3_pr_seq_non_holder(). 622c66ac9dbSNicholas Bellinger */ 623c66ac9dbSNicholas Bellinger if (ret != 0) 624c66ac9dbSNicholas Bellinger *pr_reg_type |= 0x80000000; 625c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 626c66ac9dbSNicholas Bellinger 627c66ac9dbSNicholas Bellinger return ret; 628c66ac9dbSNicholas Bellinger } 629c66ac9dbSNicholas Bellinger 630c66ac9dbSNicholas Bellinger static struct t10_pr_registration *__core_scsi3_do_alloc_registration( 631c66ac9dbSNicholas Bellinger struct se_device *dev, 632c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 633c66ac9dbSNicholas Bellinger struct se_dev_entry *deve, 634c66ac9dbSNicholas Bellinger unsigned char *isid, 635c66ac9dbSNicholas Bellinger u64 sa_res_key, 636c66ac9dbSNicholas Bellinger int all_tg_pt, 637c66ac9dbSNicholas Bellinger int aptpl) 638c66ac9dbSNicholas Bellinger { 639c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 640c66ac9dbSNicholas Bellinger 641c66ac9dbSNicholas Bellinger pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_ATOMIC); 6426708bb27SAndy Grover if (!pr_reg) { 6436708bb27SAndy Grover pr_err("Unable to allocate struct t10_pr_registration\n"); 644c66ac9dbSNicholas Bellinger return NULL; 645c66ac9dbSNicholas Bellinger } 646c66ac9dbSNicholas Bellinger 6470fd97ccfSChristoph Hellwig pr_reg->pr_aptpl_buf = kzalloc(dev->t10_pr.pr_aptpl_buf_len, 648c66ac9dbSNicholas Bellinger GFP_ATOMIC); 6496708bb27SAndy Grover if (!pr_reg->pr_aptpl_buf) { 6506708bb27SAndy Grover pr_err("Unable to allocate pr_reg->pr_aptpl_buf\n"); 651c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 652c66ac9dbSNicholas Bellinger return NULL; 653c66ac9dbSNicholas Bellinger } 654c66ac9dbSNicholas Bellinger 655c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_list); 656c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list); 657c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list); 658c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list); 659c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list); 660c66ac9dbSNicholas Bellinger atomic_set(&pr_reg->pr_res_holders, 0); 661c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = nacl; 662c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve = deve; 663c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun = deve->mapped_lun; 664c66ac9dbSNicholas Bellinger pr_reg->pr_aptpl_target_lun = deve->se_lun->unpacked_lun; 665c66ac9dbSNicholas Bellinger pr_reg->pr_res_key = sa_res_key; 666c66ac9dbSNicholas Bellinger pr_reg->pr_reg_all_tg_pt = all_tg_pt; 667c66ac9dbSNicholas Bellinger pr_reg->pr_reg_aptpl = aptpl; 668c66ac9dbSNicholas Bellinger pr_reg->pr_reg_tg_pt_lun = deve->se_lun; 669c66ac9dbSNicholas Bellinger /* 670c66ac9dbSNicholas Bellinger * If an ISID value for this SCSI Initiator Port exists, 671c66ac9dbSNicholas Bellinger * save it to the registration now. 672c66ac9dbSNicholas Bellinger */ 673c66ac9dbSNicholas Bellinger if (isid != NULL) { 674c66ac9dbSNicholas Bellinger pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid); 675c66ac9dbSNicholas Bellinger snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid); 676c66ac9dbSNicholas Bellinger pr_reg->isid_present_at_reg = 1; 677c66ac9dbSNicholas Bellinger } 678c66ac9dbSNicholas Bellinger 679c66ac9dbSNicholas Bellinger return pr_reg; 680c66ac9dbSNicholas Bellinger } 681c66ac9dbSNicholas Bellinger 682c66ac9dbSNicholas Bellinger static int core_scsi3_lunacl_depend_item(struct se_dev_entry *); 683c66ac9dbSNicholas Bellinger static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *); 684c66ac9dbSNicholas Bellinger 685c66ac9dbSNicholas Bellinger /* 686c66ac9dbSNicholas Bellinger * Function used for handling PR registrations for ALL_TG_PT=1 and ALL_TG_PT=0 687c66ac9dbSNicholas Bellinger * modes. 688c66ac9dbSNicholas Bellinger */ 689c66ac9dbSNicholas Bellinger static struct t10_pr_registration *__core_scsi3_alloc_registration( 690c66ac9dbSNicholas Bellinger struct se_device *dev, 691c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 692c66ac9dbSNicholas Bellinger struct se_dev_entry *deve, 693c66ac9dbSNicholas Bellinger unsigned char *isid, 694c66ac9dbSNicholas Bellinger u64 sa_res_key, 695c66ac9dbSNicholas Bellinger int all_tg_pt, 696c66ac9dbSNicholas Bellinger int aptpl) 697c66ac9dbSNicholas Bellinger { 698c66ac9dbSNicholas Bellinger struct se_dev_entry *deve_tmp; 699c66ac9dbSNicholas Bellinger struct se_node_acl *nacl_tmp; 700c66ac9dbSNicholas Bellinger struct se_port *port, *port_tmp; 701c66ac9dbSNicholas Bellinger struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; 702c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_atp, *pr_reg_tmp, *pr_reg_tmp_safe; 703c66ac9dbSNicholas Bellinger int ret; 704c66ac9dbSNicholas Bellinger /* 705c66ac9dbSNicholas Bellinger * Create a registration for the I_T Nexus upon which the 706c66ac9dbSNicholas Bellinger * PROUT REGISTER was received. 707c66ac9dbSNicholas Bellinger */ 708c66ac9dbSNicholas Bellinger pr_reg = __core_scsi3_do_alloc_registration(dev, nacl, deve, isid, 709c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl); 7106708bb27SAndy Grover if (!pr_reg) 711c66ac9dbSNicholas Bellinger return NULL; 712c66ac9dbSNicholas Bellinger /* 713c66ac9dbSNicholas Bellinger * Return pointer to pr_reg for ALL_TG_PT=0 714c66ac9dbSNicholas Bellinger */ 7156708bb27SAndy Grover if (!all_tg_pt) 716c66ac9dbSNicholas Bellinger return pr_reg; 717c66ac9dbSNicholas Bellinger /* 718c66ac9dbSNicholas Bellinger * Create list of matching SCSI Initiator Port registrations 719c66ac9dbSNicholas Bellinger * for ALL_TG_PT=1 720c66ac9dbSNicholas Bellinger */ 721c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 722c66ac9dbSNicholas Bellinger list_for_each_entry_safe(port, port_tmp, &dev->dev_sep_list, sep_list) { 723c66ac9dbSNicholas Bellinger atomic_inc(&port->sep_tg_pt_ref_cnt); 724c66ac9dbSNicholas Bellinger smp_mb__after_atomic_inc(); 725c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 726c66ac9dbSNicholas Bellinger 727c66ac9dbSNicholas Bellinger spin_lock_bh(&port->sep_alua_lock); 728c66ac9dbSNicholas Bellinger list_for_each_entry(deve_tmp, &port->sep_alua_list, 729c66ac9dbSNicholas Bellinger alua_port_list) { 730c66ac9dbSNicholas Bellinger /* 731c66ac9dbSNicholas Bellinger * This pointer will be NULL for demo mode MappedLUNs 732c66ac9dbSNicholas Bellinger * that have not been make explict via a ConfigFS 733c66ac9dbSNicholas Bellinger * MappedLUN group for the SCSI Initiator Node ACL. 734c66ac9dbSNicholas Bellinger */ 7356708bb27SAndy Grover if (!deve_tmp->se_lun_acl) 736c66ac9dbSNicholas Bellinger continue; 737c66ac9dbSNicholas Bellinger 738c66ac9dbSNicholas Bellinger nacl_tmp = deve_tmp->se_lun_acl->se_lun_nacl; 739c66ac9dbSNicholas Bellinger /* 740c66ac9dbSNicholas Bellinger * Skip the matching struct se_node_acl that is allocated 741c66ac9dbSNicholas Bellinger * above.. 742c66ac9dbSNicholas Bellinger */ 743c66ac9dbSNicholas Bellinger if (nacl == nacl_tmp) 744c66ac9dbSNicholas Bellinger continue; 745c66ac9dbSNicholas Bellinger /* 746c66ac9dbSNicholas Bellinger * Only perform PR registrations for target ports on 747c66ac9dbSNicholas Bellinger * the same fabric module as the REGISTER w/ ALL_TG_PT=1 748c66ac9dbSNicholas Bellinger * arrived. 749c66ac9dbSNicholas Bellinger */ 750c66ac9dbSNicholas Bellinger if (tfo != nacl_tmp->se_tpg->se_tpg_tfo) 751c66ac9dbSNicholas Bellinger continue; 752c66ac9dbSNicholas Bellinger /* 753c66ac9dbSNicholas Bellinger * Look for a matching Initiator Node ACL in ASCII format 754c66ac9dbSNicholas Bellinger */ 755c66ac9dbSNicholas Bellinger if (strcmp(nacl->initiatorname, nacl_tmp->initiatorname)) 756c66ac9dbSNicholas Bellinger continue; 757c66ac9dbSNicholas Bellinger 758c66ac9dbSNicholas Bellinger atomic_inc(&deve_tmp->pr_ref_count); 759c66ac9dbSNicholas Bellinger smp_mb__after_atomic_inc(); 760c66ac9dbSNicholas Bellinger spin_unlock_bh(&port->sep_alua_lock); 761c66ac9dbSNicholas Bellinger /* 762c66ac9dbSNicholas Bellinger * Grab a configfs group dependency that is released 763c66ac9dbSNicholas Bellinger * for the exception path at label out: below, or upon 764c66ac9dbSNicholas Bellinger * completion of adding ALL_TG_PT=1 registrations in 765c66ac9dbSNicholas Bellinger * __core_scsi3_add_registration() 766c66ac9dbSNicholas Bellinger */ 767c66ac9dbSNicholas Bellinger ret = core_scsi3_lunacl_depend_item(deve_tmp); 768c66ac9dbSNicholas Bellinger if (ret < 0) { 7696708bb27SAndy Grover pr_err("core_scsi3_lunacl_depend" 770c66ac9dbSNicholas Bellinger "_item() failed\n"); 771c66ac9dbSNicholas Bellinger atomic_dec(&port->sep_tg_pt_ref_cnt); 772c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 773c66ac9dbSNicholas Bellinger atomic_dec(&deve_tmp->pr_ref_count); 774c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 775c66ac9dbSNicholas Bellinger goto out; 776c66ac9dbSNicholas Bellinger } 777c66ac9dbSNicholas Bellinger /* 778c66ac9dbSNicholas Bellinger * Located a matching SCSI Initiator Port on a different 779c66ac9dbSNicholas Bellinger * port, allocate the pr_reg_atp and attach it to the 780c66ac9dbSNicholas Bellinger * pr_reg->pr_reg_atp_list that will be processed once 781c66ac9dbSNicholas Bellinger * the original *pr_reg is processed in 782c66ac9dbSNicholas Bellinger * __core_scsi3_add_registration() 783c66ac9dbSNicholas Bellinger */ 784c66ac9dbSNicholas Bellinger pr_reg_atp = __core_scsi3_do_alloc_registration(dev, 785c66ac9dbSNicholas Bellinger nacl_tmp, deve_tmp, NULL, 786c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl); 7876708bb27SAndy Grover if (!pr_reg_atp) { 788c66ac9dbSNicholas Bellinger atomic_dec(&port->sep_tg_pt_ref_cnt); 789c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 790c66ac9dbSNicholas Bellinger atomic_dec(&deve_tmp->pr_ref_count); 791c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 792c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(deve_tmp); 793c66ac9dbSNicholas Bellinger goto out; 794c66ac9dbSNicholas Bellinger } 795c66ac9dbSNicholas Bellinger 796c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg_atp->pr_reg_atp_mem_list, 797c66ac9dbSNicholas Bellinger &pr_reg->pr_reg_atp_list); 798c66ac9dbSNicholas Bellinger spin_lock_bh(&port->sep_alua_lock); 799c66ac9dbSNicholas Bellinger } 800c66ac9dbSNicholas Bellinger spin_unlock_bh(&port->sep_alua_lock); 801c66ac9dbSNicholas Bellinger 802c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 803c66ac9dbSNicholas Bellinger atomic_dec(&port->sep_tg_pt_ref_cnt); 804c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 805c66ac9dbSNicholas Bellinger } 806c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 807c66ac9dbSNicholas Bellinger 808c66ac9dbSNicholas Bellinger return pr_reg; 809c66ac9dbSNicholas Bellinger out: 810c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, 811c66ac9dbSNicholas Bellinger &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) { 812c66ac9dbSNicholas Bellinger list_del(&pr_reg_tmp->pr_reg_atp_mem_list); 813c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); 814c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp); 815c66ac9dbSNicholas Bellinger } 816c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 817c66ac9dbSNicholas Bellinger return NULL; 818c66ac9dbSNicholas Bellinger } 819c66ac9dbSNicholas Bellinger 820c66ac9dbSNicholas Bellinger int core_scsi3_alloc_aptpl_registration( 821e3d6f909SAndy Grover struct t10_reservation *pr_tmpl, 822c66ac9dbSNicholas Bellinger u64 sa_res_key, 823c66ac9dbSNicholas Bellinger unsigned char *i_port, 824c66ac9dbSNicholas Bellinger unsigned char *isid, 825c66ac9dbSNicholas Bellinger u32 mapped_lun, 826c66ac9dbSNicholas Bellinger unsigned char *t_port, 827c66ac9dbSNicholas Bellinger u16 tpgt, 828c66ac9dbSNicholas Bellinger u32 target_lun, 829c66ac9dbSNicholas Bellinger int res_holder, 830c66ac9dbSNicholas Bellinger int all_tg_pt, 831c66ac9dbSNicholas Bellinger u8 type) 832c66ac9dbSNicholas Bellinger { 833c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 834c66ac9dbSNicholas Bellinger 8356708bb27SAndy Grover if (!i_port || !t_port || !sa_res_key) { 8366708bb27SAndy Grover pr_err("Illegal parameters for APTPL registration\n"); 837e3d6f909SAndy Grover return -EINVAL; 838c66ac9dbSNicholas Bellinger } 839c66ac9dbSNicholas Bellinger 840c66ac9dbSNicholas Bellinger pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_KERNEL); 8416708bb27SAndy Grover if (!pr_reg) { 8426708bb27SAndy Grover pr_err("Unable to allocate struct t10_pr_registration\n"); 843e3d6f909SAndy Grover return -ENOMEM; 844c66ac9dbSNicholas Bellinger } 845c66ac9dbSNicholas Bellinger pr_reg->pr_aptpl_buf = kzalloc(pr_tmpl->pr_aptpl_buf_len, GFP_KERNEL); 846c66ac9dbSNicholas Bellinger 847c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_list); 848c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list); 849c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list); 850c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list); 851c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list); 852c66ac9dbSNicholas Bellinger atomic_set(&pr_reg->pr_res_holders, 0); 853c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = NULL; 854c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve = NULL; 855c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun = mapped_lun; 856c66ac9dbSNicholas Bellinger pr_reg->pr_aptpl_target_lun = target_lun; 857c66ac9dbSNicholas Bellinger pr_reg->pr_res_key = sa_res_key; 858c66ac9dbSNicholas Bellinger pr_reg->pr_reg_all_tg_pt = all_tg_pt; 859c66ac9dbSNicholas Bellinger pr_reg->pr_reg_aptpl = 1; 860c66ac9dbSNicholas Bellinger pr_reg->pr_reg_tg_pt_lun = NULL; 861c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope = 0; /* Always LUN_SCOPE */ 862c66ac9dbSNicholas Bellinger pr_reg->pr_res_type = type; 863c66ac9dbSNicholas Bellinger /* 864c66ac9dbSNicholas Bellinger * If an ISID value had been saved in APTPL metadata for this 865c66ac9dbSNicholas Bellinger * SCSI Initiator Port, restore it now. 866c66ac9dbSNicholas Bellinger */ 867c66ac9dbSNicholas Bellinger if (isid != NULL) { 868c66ac9dbSNicholas Bellinger pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid); 869c66ac9dbSNicholas Bellinger snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid); 870c66ac9dbSNicholas Bellinger pr_reg->isid_present_at_reg = 1; 871c66ac9dbSNicholas Bellinger } 872c66ac9dbSNicholas Bellinger /* 873c66ac9dbSNicholas Bellinger * Copy the i_port and t_port information from caller. 874c66ac9dbSNicholas Bellinger */ 875c66ac9dbSNicholas Bellinger snprintf(pr_reg->pr_iport, PR_APTPL_MAX_IPORT_LEN, "%s", i_port); 876c66ac9dbSNicholas Bellinger snprintf(pr_reg->pr_tport, PR_APTPL_MAX_TPORT_LEN, "%s", t_port); 877c66ac9dbSNicholas Bellinger pr_reg->pr_reg_tpgt = tpgt; 878c66ac9dbSNicholas Bellinger /* 879c66ac9dbSNicholas Bellinger * Set pr_res_holder from caller, the pr_reg who is the reservation 880c66ac9dbSNicholas Bellinger * holder will get it's pointer set in core_scsi3_aptpl_reserve() once 881c66ac9dbSNicholas Bellinger * the Initiator Node LUN ACL from the fabric module is created for 882c66ac9dbSNicholas Bellinger * this registration. 883c66ac9dbSNicholas Bellinger */ 884c66ac9dbSNicholas Bellinger pr_reg->pr_res_holder = res_holder; 885c66ac9dbSNicholas Bellinger 886c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg->pr_reg_aptpl_list, &pr_tmpl->aptpl_reg_list); 8876708bb27SAndy Grover pr_debug("SPC-3 PR APTPL Successfully added registration%s from" 888c66ac9dbSNicholas Bellinger " metadata\n", (res_holder) ? "+reservation" : ""); 889c66ac9dbSNicholas Bellinger return 0; 890c66ac9dbSNicholas Bellinger } 891c66ac9dbSNicholas Bellinger 892c66ac9dbSNicholas Bellinger static void core_scsi3_aptpl_reserve( 893c66ac9dbSNicholas Bellinger struct se_device *dev, 894c66ac9dbSNicholas Bellinger struct se_portal_group *tpg, 895c66ac9dbSNicholas Bellinger struct se_node_acl *node_acl, 896c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg) 897c66ac9dbSNicholas Bellinger { 898c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 899c66ac9dbSNicholas Bellinger int prf_isid; 900c66ac9dbSNicholas Bellinger 901c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 902c66ac9dbSNicholas Bellinger prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], 903c66ac9dbSNicholas Bellinger PR_REG_ISID_ID_LEN); 904c66ac9dbSNicholas Bellinger 905c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 906c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = pr_reg; 907c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 908c66ac9dbSNicholas Bellinger 9096708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: APTPL RESERVE created" 910c66ac9dbSNicholas Bellinger " new reservation holder TYPE: %s ALL_TG_PT: %d\n", 911e3d6f909SAndy Grover tpg->se_tpg_tfo->get_fabric_name(), 912c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg->pr_res_type), 913c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); 9146708bb27SAndy Grover pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n", 915e3d6f909SAndy Grover tpg->se_tpg_tfo->get_fabric_name(), node_acl->initiatorname, 916c66ac9dbSNicholas Bellinger (prf_isid) ? &i_buf[0] : ""); 917c66ac9dbSNicholas Bellinger } 918c66ac9dbSNicholas Bellinger 919c66ac9dbSNicholas Bellinger static void __core_scsi3_add_registration(struct se_device *, struct se_node_acl *, 920c66ac9dbSNicholas Bellinger struct t10_pr_registration *, int, int); 921c66ac9dbSNicholas Bellinger 922c66ac9dbSNicholas Bellinger static int __core_scsi3_check_aptpl_registration( 923c66ac9dbSNicholas Bellinger struct se_device *dev, 924c66ac9dbSNicholas Bellinger struct se_portal_group *tpg, 925c66ac9dbSNicholas Bellinger struct se_lun *lun, 926c66ac9dbSNicholas Bellinger u32 target_lun, 927c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 928c66ac9dbSNicholas Bellinger struct se_dev_entry *deve) 929c66ac9dbSNicholas Bellinger { 930c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp; 9310fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 932c66ac9dbSNicholas Bellinger unsigned char i_port[PR_APTPL_MAX_IPORT_LEN]; 933c66ac9dbSNicholas Bellinger unsigned char t_port[PR_APTPL_MAX_TPORT_LEN]; 934c66ac9dbSNicholas Bellinger u16 tpgt; 935c66ac9dbSNicholas Bellinger 936c66ac9dbSNicholas Bellinger memset(i_port, 0, PR_APTPL_MAX_IPORT_LEN); 937c66ac9dbSNicholas Bellinger memset(t_port, 0, PR_APTPL_MAX_TPORT_LEN); 938c66ac9dbSNicholas Bellinger /* 939c66ac9dbSNicholas Bellinger * Copy Initiator Port information from struct se_node_acl 940c66ac9dbSNicholas Bellinger */ 941c66ac9dbSNicholas Bellinger snprintf(i_port, PR_APTPL_MAX_IPORT_LEN, "%s", nacl->initiatorname); 942c66ac9dbSNicholas Bellinger snprintf(t_port, PR_APTPL_MAX_TPORT_LEN, "%s", 943e3d6f909SAndy Grover tpg->se_tpg_tfo->tpg_get_wwn(tpg)); 944e3d6f909SAndy Grover tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); 945c66ac9dbSNicholas Bellinger /* 946c66ac9dbSNicholas Bellinger * Look for the matching registrations+reservation from those 947c66ac9dbSNicholas Bellinger * created from APTPL metadata. Note that multiple registrations 948c66ac9dbSNicholas Bellinger * may exist for fabrics that use ISIDs in their SCSI Initiator Port 949c66ac9dbSNicholas Bellinger * TransportIDs. 950c66ac9dbSNicholas Bellinger */ 951c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->aptpl_reg_lock); 952c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, 953c66ac9dbSNicholas Bellinger pr_reg_aptpl_list) { 9546708bb27SAndy Grover if (!strcmp(pr_reg->pr_iport, i_port) && 955c66ac9dbSNicholas Bellinger (pr_reg->pr_res_mapped_lun == deve->mapped_lun) && 956c66ac9dbSNicholas Bellinger !(strcmp(pr_reg->pr_tport, t_port)) && 957c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_tpgt == tpgt) && 958c66ac9dbSNicholas Bellinger (pr_reg->pr_aptpl_target_lun == target_lun)) { 959c66ac9dbSNicholas Bellinger 960c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = nacl; 961c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve = deve; 962c66ac9dbSNicholas Bellinger pr_reg->pr_reg_tg_pt_lun = lun; 963c66ac9dbSNicholas Bellinger 964c66ac9dbSNicholas Bellinger list_del(&pr_reg->pr_reg_aptpl_list); 965c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->aptpl_reg_lock); 966c66ac9dbSNicholas Bellinger /* 967c66ac9dbSNicholas Bellinger * At this point all of the pointers in *pr_reg will 968c66ac9dbSNicholas Bellinger * be setup, so go ahead and add the registration. 969c66ac9dbSNicholas Bellinger */ 970c66ac9dbSNicholas Bellinger 971c66ac9dbSNicholas Bellinger __core_scsi3_add_registration(dev, nacl, pr_reg, 0, 0); 972c66ac9dbSNicholas Bellinger /* 973c66ac9dbSNicholas Bellinger * If this registration is the reservation holder, 974c66ac9dbSNicholas Bellinger * make that happen now.. 975c66ac9dbSNicholas Bellinger */ 976c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_holder) 977c66ac9dbSNicholas Bellinger core_scsi3_aptpl_reserve(dev, tpg, 978c66ac9dbSNicholas Bellinger nacl, pr_reg); 979c66ac9dbSNicholas Bellinger /* 980c66ac9dbSNicholas Bellinger * Reenable pr_aptpl_active to accept new metadata 981c66ac9dbSNicholas Bellinger * updates once the SCSI device is active again.. 982c66ac9dbSNicholas Bellinger */ 983c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->aptpl_reg_lock); 984c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_active = 1; 985c66ac9dbSNicholas Bellinger } 986c66ac9dbSNicholas Bellinger } 987c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->aptpl_reg_lock); 988c66ac9dbSNicholas Bellinger 989c66ac9dbSNicholas Bellinger return 0; 990c66ac9dbSNicholas Bellinger } 991c66ac9dbSNicholas Bellinger 992c66ac9dbSNicholas Bellinger int core_scsi3_check_aptpl_registration( 993c66ac9dbSNicholas Bellinger struct se_device *dev, 994c66ac9dbSNicholas Bellinger struct se_portal_group *tpg, 995c66ac9dbSNicholas Bellinger struct se_lun *lun, 996c66ac9dbSNicholas Bellinger struct se_lun_acl *lun_acl) 997c66ac9dbSNicholas Bellinger { 998c66ac9dbSNicholas Bellinger struct se_node_acl *nacl = lun_acl->se_lun_nacl; 999f2083241SJörn Engel struct se_dev_entry *deve = nacl->device_list[lun_acl->mapped_lun]; 1000c66ac9dbSNicholas Bellinger 10010fd97ccfSChristoph Hellwig if (dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) 1002c66ac9dbSNicholas Bellinger return 0; 1003c66ac9dbSNicholas Bellinger 1004c66ac9dbSNicholas Bellinger return __core_scsi3_check_aptpl_registration(dev, tpg, lun, 1005c66ac9dbSNicholas Bellinger lun->unpacked_lun, nacl, deve); 1006c66ac9dbSNicholas Bellinger } 1007c66ac9dbSNicholas Bellinger 1008c66ac9dbSNicholas Bellinger static void __core_scsi3_dump_registration( 1009c66ac9dbSNicholas Bellinger struct target_core_fabric_ops *tfo, 1010c66ac9dbSNicholas Bellinger struct se_device *dev, 1011c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 1012c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 1013c66ac9dbSNicholas Bellinger int register_type) 1014c66ac9dbSNicholas Bellinger { 1015c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg = nacl->se_tpg; 1016c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 1017c66ac9dbSNicholas Bellinger int prf_isid; 1018c66ac9dbSNicholas Bellinger 1019c66ac9dbSNicholas Bellinger memset(&i_buf[0], 0, PR_REG_ISID_ID_LEN); 1020c66ac9dbSNicholas Bellinger prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], 1021c66ac9dbSNicholas Bellinger PR_REG_ISID_ID_LEN); 1022c66ac9dbSNicholas Bellinger 10236708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: REGISTER%s Initiator" 1024c66ac9dbSNicholas Bellinger " Node: %s%s\n", tfo->get_fabric_name(), (register_type == 2) ? 1025c66ac9dbSNicholas Bellinger "_AND_MOVE" : (register_type == 1) ? 1026c66ac9dbSNicholas Bellinger "_AND_IGNORE_EXISTING_KEY" : "", nacl->initiatorname, 1027c66ac9dbSNicholas Bellinger (prf_isid) ? i_buf : ""); 10286708bb27SAndy Grover pr_debug("SPC-3 PR [%s] registration on Target Port: %s,0x%04x\n", 1029c66ac9dbSNicholas Bellinger tfo->get_fabric_name(), tfo->tpg_get_wwn(se_tpg), 1030c66ac9dbSNicholas Bellinger tfo->tpg_get_tag(se_tpg)); 10316708bb27SAndy Grover pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target" 1032c66ac9dbSNicholas Bellinger " Port(s)\n", tfo->get_fabric_name(), 1033c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE", 1034e3d6f909SAndy Grover dev->transport->name); 10356708bb27SAndy Grover pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:" 1036c66ac9dbSNicholas Bellinger " 0x%08x APTPL: %d\n", tfo->get_fabric_name(), 1037c66ac9dbSNicholas Bellinger pr_reg->pr_res_key, pr_reg->pr_res_generation, 1038c66ac9dbSNicholas Bellinger pr_reg->pr_reg_aptpl); 1039c66ac9dbSNicholas Bellinger } 1040c66ac9dbSNicholas Bellinger 1041c66ac9dbSNicholas Bellinger /* 1042c66ac9dbSNicholas Bellinger * this function can be called with struct se_device->dev_reservation_lock 1043c66ac9dbSNicholas Bellinger * when register_move = 1 1044c66ac9dbSNicholas Bellinger */ 1045c66ac9dbSNicholas Bellinger static void __core_scsi3_add_registration( 1046c66ac9dbSNicholas Bellinger struct se_device *dev, 1047c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 1048c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 1049c66ac9dbSNicholas Bellinger int register_type, 1050c66ac9dbSNicholas Bellinger int register_move) 1051c66ac9dbSNicholas Bellinger { 1052c66ac9dbSNicholas Bellinger struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; 1053c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe; 10540fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 1055c66ac9dbSNicholas Bellinger 1056c66ac9dbSNicholas Bellinger /* 1057c66ac9dbSNicholas Bellinger * Increment PRgeneration counter for struct se_device upon a successful 1058c66ac9dbSNicholas Bellinger * REGISTER, see spc4r17 section 6.3.2 READ_KEYS service action 1059c66ac9dbSNicholas Bellinger * 1060c66ac9dbSNicholas Bellinger * Also, when register_move = 1 for PROUT REGISTER_AND_MOVE service 1061c66ac9dbSNicholas Bellinger * action, the struct se_device->dev_reservation_lock will already be held, 1062c66ac9dbSNicholas Bellinger * so we do not call core_scsi3_pr_generation() which grabs the lock 1063c66ac9dbSNicholas Bellinger * for the REGISTER. 1064c66ac9dbSNicholas Bellinger */ 1065c66ac9dbSNicholas Bellinger pr_reg->pr_res_generation = (register_move) ? 10660fd97ccfSChristoph Hellwig dev->t10_pr.pr_generation++ : 1067c66ac9dbSNicholas Bellinger core_scsi3_pr_generation(dev); 1068c66ac9dbSNicholas Bellinger 1069c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1070c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg->pr_reg_list, &pr_tmpl->registration_list); 1071c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve->def_pr_registered = 1; 1072c66ac9dbSNicholas Bellinger 1073c66ac9dbSNicholas Bellinger __core_scsi3_dump_registration(tfo, dev, nacl, pr_reg, register_type); 1074c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1075c66ac9dbSNicholas Bellinger /* 1076c66ac9dbSNicholas Bellinger * Skip extra processing for ALL_TG_PT=0 or REGISTER_AND_MOVE. 1077c66ac9dbSNicholas Bellinger */ 10786708bb27SAndy Grover if (!pr_reg->pr_reg_all_tg_pt || register_move) 1079c66ac9dbSNicholas Bellinger return; 1080c66ac9dbSNicholas Bellinger /* 1081c66ac9dbSNicholas Bellinger * Walk pr_reg->pr_reg_atp_list and add registrations for ALL_TG_PT=1 1082c66ac9dbSNicholas Bellinger * allocated in __core_scsi3_alloc_registration() 1083c66ac9dbSNicholas Bellinger */ 1084c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, 1085c66ac9dbSNicholas Bellinger &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) { 1086c66ac9dbSNicholas Bellinger list_del(&pr_reg_tmp->pr_reg_atp_mem_list); 1087c66ac9dbSNicholas Bellinger 1088c66ac9dbSNicholas Bellinger pr_reg_tmp->pr_res_generation = core_scsi3_pr_generation(dev); 1089c66ac9dbSNicholas Bellinger 1090c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1091c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg_tmp->pr_reg_list, 1092c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list); 1093c66ac9dbSNicholas Bellinger pr_reg_tmp->pr_reg_deve->def_pr_registered = 1; 1094c66ac9dbSNicholas Bellinger 1095c66ac9dbSNicholas Bellinger __core_scsi3_dump_registration(tfo, dev, 1096c66ac9dbSNicholas Bellinger pr_reg_tmp->pr_reg_nacl, pr_reg_tmp, 1097c66ac9dbSNicholas Bellinger register_type); 1098c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1099c66ac9dbSNicholas Bellinger /* 1100c66ac9dbSNicholas Bellinger * Drop configfs group dependency reference from 1101c66ac9dbSNicholas Bellinger * __core_scsi3_alloc_registration() 1102c66ac9dbSNicholas Bellinger */ 1103c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); 1104c66ac9dbSNicholas Bellinger } 1105c66ac9dbSNicholas Bellinger } 1106c66ac9dbSNicholas Bellinger 1107c66ac9dbSNicholas Bellinger static int core_scsi3_alloc_registration( 1108c66ac9dbSNicholas Bellinger struct se_device *dev, 1109c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 1110c66ac9dbSNicholas Bellinger struct se_dev_entry *deve, 1111c66ac9dbSNicholas Bellinger unsigned char *isid, 1112c66ac9dbSNicholas Bellinger u64 sa_res_key, 1113c66ac9dbSNicholas Bellinger int all_tg_pt, 1114c66ac9dbSNicholas Bellinger int aptpl, 1115c66ac9dbSNicholas Bellinger int register_type, 1116c66ac9dbSNicholas Bellinger int register_move) 1117c66ac9dbSNicholas Bellinger { 1118c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 1119c66ac9dbSNicholas Bellinger 1120c66ac9dbSNicholas Bellinger pr_reg = __core_scsi3_alloc_registration(dev, nacl, deve, isid, 1121c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl); 11226708bb27SAndy Grover if (!pr_reg) 1123e3d6f909SAndy Grover return -EPERM; 1124c66ac9dbSNicholas Bellinger 1125c66ac9dbSNicholas Bellinger __core_scsi3_add_registration(dev, nacl, pr_reg, 1126c66ac9dbSNicholas Bellinger register_type, register_move); 1127c66ac9dbSNicholas Bellinger return 0; 1128c66ac9dbSNicholas Bellinger } 1129c66ac9dbSNicholas Bellinger 1130c66ac9dbSNicholas Bellinger static struct t10_pr_registration *__core_scsi3_locate_pr_reg( 1131c66ac9dbSNicholas Bellinger struct se_device *dev, 1132c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 1133c66ac9dbSNicholas Bellinger unsigned char *isid) 1134c66ac9dbSNicholas Bellinger { 11350fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 1136c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp; 1137c66ac9dbSNicholas Bellinger struct se_portal_group *tpg; 1138c66ac9dbSNicholas Bellinger 1139c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1140c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 1141c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 1142c66ac9dbSNicholas Bellinger /* 1143c66ac9dbSNicholas Bellinger * First look for a matching struct se_node_acl 1144c66ac9dbSNicholas Bellinger */ 1145c66ac9dbSNicholas Bellinger if (pr_reg->pr_reg_nacl != nacl) 1146c66ac9dbSNicholas Bellinger continue; 1147c66ac9dbSNicholas Bellinger 1148c66ac9dbSNicholas Bellinger tpg = pr_reg->pr_reg_nacl->se_tpg; 1149c66ac9dbSNicholas Bellinger /* 1150c66ac9dbSNicholas Bellinger * If this registration does NOT contain a fabric provided 1151c66ac9dbSNicholas Bellinger * ISID, then we have found a match. 1152c66ac9dbSNicholas Bellinger */ 11536708bb27SAndy Grover if (!pr_reg->isid_present_at_reg) { 1154c66ac9dbSNicholas Bellinger /* 1155c66ac9dbSNicholas Bellinger * Determine if this SCSI device server requires that 1156c66ac9dbSNicholas Bellinger * SCSI Intiatior TransportID w/ ISIDs is enforced 1157c66ac9dbSNicholas Bellinger * for fabric modules (iSCSI) requiring them. 1158c66ac9dbSNicholas Bellinger */ 1159e3d6f909SAndy Grover if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { 11600fd97ccfSChristoph Hellwig if (dev->dev_attrib.enforce_pr_isids) 1161c66ac9dbSNicholas Bellinger continue; 1162c66ac9dbSNicholas Bellinger } 1163c66ac9dbSNicholas Bellinger atomic_inc(&pr_reg->pr_res_holders); 1164c66ac9dbSNicholas Bellinger smp_mb__after_atomic_inc(); 1165c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1166c66ac9dbSNicholas Bellinger return pr_reg; 1167c66ac9dbSNicholas Bellinger } 1168c66ac9dbSNicholas Bellinger /* 1169c66ac9dbSNicholas Bellinger * If the *pr_reg contains a fabric defined ISID for multi-value 1170c66ac9dbSNicholas Bellinger * SCSI Initiator Port TransportIDs, then we expect a valid 1171c66ac9dbSNicholas Bellinger * matching ISID to be provided by the local SCSI Initiator Port. 1172c66ac9dbSNicholas Bellinger */ 11736708bb27SAndy Grover if (!isid) 1174c66ac9dbSNicholas Bellinger continue; 1175c66ac9dbSNicholas Bellinger if (strcmp(isid, pr_reg->pr_reg_isid)) 1176c66ac9dbSNicholas Bellinger continue; 1177c66ac9dbSNicholas Bellinger 1178c66ac9dbSNicholas Bellinger atomic_inc(&pr_reg->pr_res_holders); 1179c66ac9dbSNicholas Bellinger smp_mb__after_atomic_inc(); 1180c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1181c66ac9dbSNicholas Bellinger return pr_reg; 1182c66ac9dbSNicholas Bellinger } 1183c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1184c66ac9dbSNicholas Bellinger 1185c66ac9dbSNicholas Bellinger return NULL; 1186c66ac9dbSNicholas Bellinger } 1187c66ac9dbSNicholas Bellinger 1188c66ac9dbSNicholas Bellinger static struct t10_pr_registration *core_scsi3_locate_pr_reg( 1189c66ac9dbSNicholas Bellinger struct se_device *dev, 1190c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 1191c66ac9dbSNicholas Bellinger struct se_session *sess) 1192c66ac9dbSNicholas Bellinger { 1193c66ac9dbSNicholas Bellinger struct se_portal_group *tpg = nacl->se_tpg; 1194c66ac9dbSNicholas Bellinger unsigned char buf[PR_REG_ISID_LEN], *isid_ptr = NULL; 1195c66ac9dbSNicholas Bellinger 1196e3d6f909SAndy Grover if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { 1197c66ac9dbSNicholas Bellinger memset(&buf[0], 0, PR_REG_ISID_LEN); 1198e3d6f909SAndy Grover tpg->se_tpg_tfo->sess_get_initiator_sid(sess, &buf[0], 1199c66ac9dbSNicholas Bellinger PR_REG_ISID_LEN); 1200c66ac9dbSNicholas Bellinger isid_ptr = &buf[0]; 1201c66ac9dbSNicholas Bellinger } 1202c66ac9dbSNicholas Bellinger 1203c66ac9dbSNicholas Bellinger return __core_scsi3_locate_pr_reg(dev, nacl, isid_ptr); 1204c66ac9dbSNicholas Bellinger } 1205c66ac9dbSNicholas Bellinger 1206c66ac9dbSNicholas Bellinger static void core_scsi3_put_pr_reg(struct t10_pr_registration *pr_reg) 1207c66ac9dbSNicholas Bellinger { 1208c66ac9dbSNicholas Bellinger atomic_dec(&pr_reg->pr_res_holders); 1209c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 1210c66ac9dbSNicholas Bellinger } 1211c66ac9dbSNicholas Bellinger 1212c66ac9dbSNicholas Bellinger static int core_scsi3_check_implict_release( 1213c66ac9dbSNicholas Bellinger struct se_device *dev, 1214c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg) 1215c66ac9dbSNicholas Bellinger { 1216c66ac9dbSNicholas Bellinger struct se_node_acl *nacl = pr_reg->pr_reg_nacl; 1217c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_res_holder; 1218c66ac9dbSNicholas Bellinger int ret = 0; 1219c66ac9dbSNicholas Bellinger 1220c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 1221c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 12226708bb27SAndy Grover if (!pr_res_holder) { 1223c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1224c66ac9dbSNicholas Bellinger return ret; 1225c66ac9dbSNicholas Bellinger } 1226c66ac9dbSNicholas Bellinger if (pr_res_holder == pr_reg) { 1227c66ac9dbSNicholas Bellinger /* 1228c66ac9dbSNicholas Bellinger * Perform an implict RELEASE if the registration that 1229c66ac9dbSNicholas Bellinger * is being released is holding the reservation. 1230c66ac9dbSNicholas Bellinger * 1231c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.11.1: 1232c66ac9dbSNicholas Bellinger * 1233c66ac9dbSNicholas Bellinger * e) If the I_T nexus is the persistent reservation holder 1234c66ac9dbSNicholas Bellinger * and the persistent reservation is not an all registrants 1235c66ac9dbSNicholas Bellinger * type, then a PERSISTENT RESERVE OUT command with REGISTER 1236c66ac9dbSNicholas Bellinger * service action or REGISTER AND IGNORE EXISTING KEY 1237c66ac9dbSNicholas Bellinger * service action with the SERVICE ACTION RESERVATION KEY 1238c66ac9dbSNicholas Bellinger * field set to zero (see 5.7.11.3). 1239c66ac9dbSNicholas Bellinger */ 1240c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, nacl, pr_reg, 0); 1241c66ac9dbSNicholas Bellinger ret = 1; 1242c66ac9dbSNicholas Bellinger /* 1243c66ac9dbSNicholas Bellinger * For 'All Registrants' reservation types, all existing 1244c66ac9dbSNicholas Bellinger * registrations are still processed as reservation holders 1245c66ac9dbSNicholas Bellinger * in core_scsi3_pr_seq_non_holder() after the initial 1246c66ac9dbSNicholas Bellinger * reservation holder is implictly released here. 1247c66ac9dbSNicholas Bellinger */ 1248c66ac9dbSNicholas Bellinger } else if (pr_reg->pr_reg_all_tg_pt && 1249c66ac9dbSNicholas Bellinger (!strcmp(pr_res_holder->pr_reg_nacl->initiatorname, 1250c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->initiatorname)) && 1251c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_key == pr_reg->pr_res_key)) { 12526708bb27SAndy Grover pr_err("SPC-3 PR: Unable to perform ALL_TG_PT=1" 1253c66ac9dbSNicholas Bellinger " UNREGISTER while existing reservation with matching" 1254c66ac9dbSNicholas Bellinger " key 0x%016Lx is present from another SCSI Initiator" 1255c66ac9dbSNicholas Bellinger " Port\n", pr_reg->pr_res_key); 1256e3d6f909SAndy Grover ret = -EPERM; 1257c66ac9dbSNicholas Bellinger } 1258c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1259c66ac9dbSNicholas Bellinger 1260c66ac9dbSNicholas Bellinger return ret; 1261c66ac9dbSNicholas Bellinger } 1262c66ac9dbSNicholas Bellinger 1263c66ac9dbSNicholas Bellinger /* 1264e3d6f909SAndy Grover * Called with struct t10_reservation->registration_lock held. 1265c66ac9dbSNicholas Bellinger */ 1266c66ac9dbSNicholas Bellinger static void __core_scsi3_free_registration( 1267c66ac9dbSNicholas Bellinger struct se_device *dev, 1268c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 1269c66ac9dbSNicholas Bellinger struct list_head *preempt_and_abort_list, 1270c66ac9dbSNicholas Bellinger int dec_holders) 1271c66ac9dbSNicholas Bellinger { 1272c66ac9dbSNicholas Bellinger struct target_core_fabric_ops *tfo = 1273c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 12740fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 1275c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 1276c66ac9dbSNicholas Bellinger int prf_isid; 1277c66ac9dbSNicholas Bellinger 1278c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1279c66ac9dbSNicholas Bellinger prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], 1280c66ac9dbSNicholas Bellinger PR_REG_ISID_ID_LEN); 1281c66ac9dbSNicholas Bellinger 1282c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve->def_pr_registered = 0; 1283c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve->pr_res_key = 0; 1284c66ac9dbSNicholas Bellinger list_del(&pr_reg->pr_reg_list); 1285c66ac9dbSNicholas Bellinger /* 1286c66ac9dbSNicholas Bellinger * Caller accessing *pr_reg using core_scsi3_locate_pr_reg(), 1287c66ac9dbSNicholas Bellinger * so call core_scsi3_put_pr_reg() to decrement our reference. 1288c66ac9dbSNicholas Bellinger */ 1289c66ac9dbSNicholas Bellinger if (dec_holders) 1290c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 1291c66ac9dbSNicholas Bellinger /* 1292c66ac9dbSNicholas Bellinger * Wait until all reference from any other I_T nexuses for this 1293c66ac9dbSNicholas Bellinger * *pr_reg have been released. Because list_del() is called above, 1294c66ac9dbSNicholas Bellinger * the last core_scsi3_put_pr_reg(pr_reg) will release this reference 1295c66ac9dbSNicholas Bellinger * count back to zero, and we release *pr_reg. 1296c66ac9dbSNicholas Bellinger */ 1297c66ac9dbSNicholas Bellinger while (atomic_read(&pr_reg->pr_res_holders) != 0) { 1298c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 12996708bb27SAndy Grover pr_debug("SPC-3 PR [%s] waiting for pr_res_holders\n", 1300c66ac9dbSNicholas Bellinger tfo->get_fabric_name()); 1301c66ac9dbSNicholas Bellinger cpu_relax(); 1302c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1303c66ac9dbSNicholas Bellinger } 1304c66ac9dbSNicholas Bellinger 13056708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: UNREGISTER Initiator" 1306c66ac9dbSNicholas Bellinger " Node: %s%s\n", tfo->get_fabric_name(), 1307c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->initiatorname, 1308c66ac9dbSNicholas Bellinger (prf_isid) ? &i_buf[0] : ""); 13096708bb27SAndy Grover pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target" 1310c66ac9dbSNicholas Bellinger " Port(s)\n", tfo->get_fabric_name(), 1311c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE", 1312e3d6f909SAndy Grover dev->transport->name); 13136708bb27SAndy Grover pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:" 1314c66ac9dbSNicholas Bellinger " 0x%08x\n", tfo->get_fabric_name(), pr_reg->pr_res_key, 1315c66ac9dbSNicholas Bellinger pr_reg->pr_res_generation); 1316c66ac9dbSNicholas Bellinger 13176708bb27SAndy Grover if (!preempt_and_abort_list) { 1318c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve = NULL; 1319c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = NULL; 1320c66ac9dbSNicholas Bellinger kfree(pr_reg->pr_aptpl_buf); 1321c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 1322c66ac9dbSNicholas Bellinger return; 1323c66ac9dbSNicholas Bellinger } 1324c66ac9dbSNicholas Bellinger /* 1325c66ac9dbSNicholas Bellinger * For PREEMPT_AND_ABORT, the list of *pr_reg in preempt_and_abort_list 1326c66ac9dbSNicholas Bellinger * are released once the ABORT_TASK_SET has completed.. 1327c66ac9dbSNicholas Bellinger */ 1328c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg->pr_reg_abort_list, preempt_and_abort_list); 1329c66ac9dbSNicholas Bellinger } 1330c66ac9dbSNicholas Bellinger 1331c66ac9dbSNicholas Bellinger void core_scsi3_free_pr_reg_from_nacl( 1332c66ac9dbSNicholas Bellinger struct se_device *dev, 1333c66ac9dbSNicholas Bellinger struct se_node_acl *nacl) 1334c66ac9dbSNicholas Bellinger { 13350fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 1336c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder; 1337c66ac9dbSNicholas Bellinger /* 1338c66ac9dbSNicholas Bellinger * If the passed se_node_acl matches the reservation holder, 1339c66ac9dbSNicholas Bellinger * release the reservation. 1340c66ac9dbSNicholas Bellinger */ 1341c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 1342c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 1343c66ac9dbSNicholas Bellinger if ((pr_res_holder != NULL) && 1344c66ac9dbSNicholas Bellinger (pr_res_holder->pr_reg_nacl == nacl)) 1345c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, nacl, pr_res_holder, 0); 1346c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1347c66ac9dbSNicholas Bellinger /* 1348c66ac9dbSNicholas Bellinger * Release any registration associated with the struct se_node_acl. 1349c66ac9dbSNicholas Bellinger */ 1350c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1351c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 1352c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 1353c66ac9dbSNicholas Bellinger 1354c66ac9dbSNicholas Bellinger if (pr_reg->pr_reg_nacl != nacl) 1355c66ac9dbSNicholas Bellinger continue; 1356c66ac9dbSNicholas Bellinger 1357c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, NULL, 0); 1358c66ac9dbSNicholas Bellinger } 1359c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1360c66ac9dbSNicholas Bellinger } 1361c66ac9dbSNicholas Bellinger 1362c66ac9dbSNicholas Bellinger void core_scsi3_free_all_registrations( 1363c66ac9dbSNicholas Bellinger struct se_device *dev) 1364c66ac9dbSNicholas Bellinger { 13650fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 1366c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder; 1367c66ac9dbSNicholas Bellinger 1368c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 1369c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 1370c66ac9dbSNicholas Bellinger if (pr_res_holder != NULL) { 1371c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 1372c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, pr_res_nacl, 1373c66ac9dbSNicholas Bellinger pr_res_holder, 0); 1374c66ac9dbSNicholas Bellinger } 1375c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1376c66ac9dbSNicholas Bellinger 1377c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1378c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 1379c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 1380c66ac9dbSNicholas Bellinger 1381c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, NULL, 0); 1382c66ac9dbSNicholas Bellinger } 1383c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1384c66ac9dbSNicholas Bellinger 1385c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->aptpl_reg_lock); 1386c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, 1387c66ac9dbSNicholas Bellinger pr_reg_aptpl_list) { 1388c66ac9dbSNicholas Bellinger list_del(&pr_reg->pr_reg_aptpl_list); 1389c66ac9dbSNicholas Bellinger kfree(pr_reg->pr_aptpl_buf); 1390c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 1391c66ac9dbSNicholas Bellinger } 1392c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->aptpl_reg_lock); 1393c66ac9dbSNicholas Bellinger } 1394c66ac9dbSNicholas Bellinger 1395c66ac9dbSNicholas Bellinger static int core_scsi3_tpg_depend_item(struct se_portal_group *tpg) 1396c66ac9dbSNicholas Bellinger { 1397e3d6f909SAndy Grover return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys, 1398c66ac9dbSNicholas Bellinger &tpg->tpg_group.cg_item); 1399c66ac9dbSNicholas Bellinger } 1400c66ac9dbSNicholas Bellinger 1401c66ac9dbSNicholas Bellinger static void core_scsi3_tpg_undepend_item(struct se_portal_group *tpg) 1402c66ac9dbSNicholas Bellinger { 1403e3d6f909SAndy Grover configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys, 1404c66ac9dbSNicholas Bellinger &tpg->tpg_group.cg_item); 1405c66ac9dbSNicholas Bellinger 1406c66ac9dbSNicholas Bellinger atomic_dec(&tpg->tpg_pr_ref_count); 1407c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 1408c66ac9dbSNicholas Bellinger } 1409c66ac9dbSNicholas Bellinger 1410c66ac9dbSNicholas Bellinger static int core_scsi3_nodeacl_depend_item(struct se_node_acl *nacl) 1411c66ac9dbSNicholas Bellinger { 1412c66ac9dbSNicholas Bellinger struct se_portal_group *tpg = nacl->se_tpg; 1413c66ac9dbSNicholas Bellinger 1414c66ac9dbSNicholas Bellinger if (nacl->dynamic_node_acl) 1415c66ac9dbSNicholas Bellinger return 0; 1416c66ac9dbSNicholas Bellinger 1417e3d6f909SAndy Grover return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys, 1418c66ac9dbSNicholas Bellinger &nacl->acl_group.cg_item); 1419c66ac9dbSNicholas Bellinger } 1420c66ac9dbSNicholas Bellinger 1421c66ac9dbSNicholas Bellinger static void core_scsi3_nodeacl_undepend_item(struct se_node_acl *nacl) 1422c66ac9dbSNicholas Bellinger { 1423c66ac9dbSNicholas Bellinger struct se_portal_group *tpg = nacl->se_tpg; 1424c66ac9dbSNicholas Bellinger 1425c66ac9dbSNicholas Bellinger if (nacl->dynamic_node_acl) { 1426c66ac9dbSNicholas Bellinger atomic_dec(&nacl->acl_pr_ref_count); 1427c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 1428c66ac9dbSNicholas Bellinger return; 1429c66ac9dbSNicholas Bellinger } 1430c66ac9dbSNicholas Bellinger 1431e3d6f909SAndy Grover configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys, 1432c66ac9dbSNicholas Bellinger &nacl->acl_group.cg_item); 1433c66ac9dbSNicholas Bellinger 1434c66ac9dbSNicholas Bellinger atomic_dec(&nacl->acl_pr_ref_count); 1435c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 1436c66ac9dbSNicholas Bellinger } 1437c66ac9dbSNicholas Bellinger 1438c66ac9dbSNicholas Bellinger static int core_scsi3_lunacl_depend_item(struct se_dev_entry *se_deve) 1439c66ac9dbSNicholas Bellinger { 1440c66ac9dbSNicholas Bellinger struct se_lun_acl *lun_acl = se_deve->se_lun_acl; 1441c66ac9dbSNicholas Bellinger struct se_node_acl *nacl; 1442c66ac9dbSNicholas Bellinger struct se_portal_group *tpg; 1443c66ac9dbSNicholas Bellinger /* 1444c66ac9dbSNicholas Bellinger * For nacl->dynamic_node_acl=1 1445c66ac9dbSNicholas Bellinger */ 14466708bb27SAndy Grover if (!lun_acl) 1447c66ac9dbSNicholas Bellinger return 0; 1448c66ac9dbSNicholas Bellinger 1449c66ac9dbSNicholas Bellinger nacl = lun_acl->se_lun_nacl; 1450c66ac9dbSNicholas Bellinger tpg = nacl->se_tpg; 1451c66ac9dbSNicholas Bellinger 1452e3d6f909SAndy Grover return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys, 1453c66ac9dbSNicholas Bellinger &lun_acl->se_lun_group.cg_item); 1454c66ac9dbSNicholas Bellinger } 1455c66ac9dbSNicholas Bellinger 1456c66ac9dbSNicholas Bellinger static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *se_deve) 1457c66ac9dbSNicholas Bellinger { 1458c66ac9dbSNicholas Bellinger struct se_lun_acl *lun_acl = se_deve->se_lun_acl; 1459c66ac9dbSNicholas Bellinger struct se_node_acl *nacl; 1460c66ac9dbSNicholas Bellinger struct se_portal_group *tpg; 1461c66ac9dbSNicholas Bellinger /* 1462c66ac9dbSNicholas Bellinger * For nacl->dynamic_node_acl=1 1463c66ac9dbSNicholas Bellinger */ 14646708bb27SAndy Grover if (!lun_acl) { 1465c66ac9dbSNicholas Bellinger atomic_dec(&se_deve->pr_ref_count); 1466c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 1467c66ac9dbSNicholas Bellinger return; 1468c66ac9dbSNicholas Bellinger } 1469c66ac9dbSNicholas Bellinger nacl = lun_acl->se_lun_nacl; 1470c66ac9dbSNicholas Bellinger tpg = nacl->se_tpg; 1471c66ac9dbSNicholas Bellinger 1472e3d6f909SAndy Grover configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys, 1473c66ac9dbSNicholas Bellinger &lun_acl->se_lun_group.cg_item); 1474c66ac9dbSNicholas Bellinger 1475c66ac9dbSNicholas Bellinger atomic_dec(&se_deve->pr_ref_count); 1476c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 1477c66ac9dbSNicholas Bellinger } 1478c66ac9dbSNicholas Bellinger 1479c66ac9dbSNicholas Bellinger static int core_scsi3_decode_spec_i_port( 1480c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 1481c66ac9dbSNicholas Bellinger struct se_portal_group *tpg, 1482c66ac9dbSNicholas Bellinger unsigned char *l_isid, 1483c66ac9dbSNicholas Bellinger u64 sa_res_key, 1484c66ac9dbSNicholas Bellinger int all_tg_pt, 1485c66ac9dbSNicholas Bellinger int aptpl) 1486c66ac9dbSNicholas Bellinger { 14875951146dSAndy Grover struct se_device *dev = cmd->se_dev; 1488c66ac9dbSNicholas Bellinger struct se_port *tmp_port; 1489c66ac9dbSNicholas Bellinger struct se_portal_group *dest_tpg = NULL, *tmp_tpg; 1490e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 1491c66ac9dbSNicholas Bellinger struct se_node_acl *dest_node_acl = NULL; 1492c66ac9dbSNicholas Bellinger struct se_dev_entry *dest_se_deve = NULL, *local_se_deve; 1493c66ac9dbSNicholas Bellinger struct t10_pr_registration *dest_pr_reg, *local_pr_reg, *pr_reg_e; 1494c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe; 1495d0f474e5SRoland Dreier LIST_HEAD(tid_dest_list); 1496c66ac9dbSNicholas Bellinger struct pr_transport_id_holder *tidh_new, *tidh, *tidh_tmp; 1497c66ac9dbSNicholas Bellinger struct target_core_fabric_ops *tmp_tf_ops; 149805d1c7c0SAndy Grover unsigned char *buf; 1499c66ac9dbSNicholas Bellinger unsigned char *ptr, *i_str = NULL, proto_ident, tmp_proto_ident; 1500c66ac9dbSNicholas Bellinger char *iport_ptr = NULL, dest_iport[64], i_buf[PR_REG_ISID_ID_LEN]; 1501c66ac9dbSNicholas Bellinger u32 tpdl, tid_len = 0; 1502c66ac9dbSNicholas Bellinger int ret, dest_local_nexus, prf_isid; 1503c66ac9dbSNicholas Bellinger u32 dest_rtpi = 0; 1504c66ac9dbSNicholas Bellinger 1505c66ac9dbSNicholas Bellinger memset(dest_iport, 0, 64); 1506c66ac9dbSNicholas Bellinger 1507f2083241SJörn Engel local_se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; 1508c66ac9dbSNicholas Bellinger /* 1509c66ac9dbSNicholas Bellinger * Allocate a struct pr_transport_id_holder and setup the 1510c66ac9dbSNicholas Bellinger * local_node_acl and local_se_deve pointers and add to 1511c66ac9dbSNicholas Bellinger * struct list_head tid_dest_list for add registration 1512c66ac9dbSNicholas Bellinger * processing in the loop of tid_dest_list below. 1513c66ac9dbSNicholas Bellinger */ 1514c66ac9dbSNicholas Bellinger tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), GFP_KERNEL); 15156708bb27SAndy Grover if (!tidh_new) { 15166708bb27SAndy Grover pr_err("Unable to allocate tidh_new\n"); 151703e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 151803e98c9eSNicholas Bellinger return -EINVAL; 1519c66ac9dbSNicholas Bellinger } 1520c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&tidh_new->dest_list); 1521c66ac9dbSNicholas Bellinger tidh_new->dest_tpg = tpg; 1522c66ac9dbSNicholas Bellinger tidh_new->dest_node_acl = se_sess->se_node_acl; 1523c66ac9dbSNicholas Bellinger tidh_new->dest_se_deve = local_se_deve; 1524c66ac9dbSNicholas Bellinger 15255951146dSAndy Grover local_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev, 1526c66ac9dbSNicholas Bellinger se_sess->se_node_acl, local_se_deve, l_isid, 1527c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl); 15286708bb27SAndy Grover if (!local_pr_reg) { 1529c66ac9dbSNicholas Bellinger kfree(tidh_new); 153003e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 153103e98c9eSNicholas Bellinger return -ENOMEM; 1532c66ac9dbSNicholas Bellinger } 1533c66ac9dbSNicholas Bellinger tidh_new->dest_pr_reg = local_pr_reg; 1534c66ac9dbSNicholas Bellinger /* 1535c66ac9dbSNicholas Bellinger * The local I_T nexus does not hold any configfs dependances, 1536c66ac9dbSNicholas Bellinger * so we set tid_h->dest_local_nexus=1 to prevent the 1537c66ac9dbSNicholas Bellinger * configfs_undepend_item() calls in the tid_dest_list loops below. 1538c66ac9dbSNicholas Bellinger */ 1539c66ac9dbSNicholas Bellinger tidh_new->dest_local_nexus = 1; 1540c66ac9dbSNicholas Bellinger list_add_tail(&tidh_new->dest_list, &tid_dest_list); 154105d1c7c0SAndy Grover 15420d7f1299SPaolo Bonzini if (cmd->data_length < 28) { 15430d7f1299SPaolo Bonzini pr_warn("SPC-PR: Received PR OUT parameter list" 15440d7f1299SPaolo Bonzini " length too small: %u\n", cmd->data_length); 15450d7f1299SPaolo Bonzini cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 15460d7f1299SPaolo Bonzini ret = -EINVAL; 15470d7f1299SPaolo Bonzini goto out; 15480d7f1299SPaolo Bonzini } 15490d7f1299SPaolo Bonzini 15504949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 1551c66ac9dbSNicholas Bellinger /* 1552c66ac9dbSNicholas Bellinger * For a PERSISTENT RESERVE OUT specify initiator ports payload, 1553c66ac9dbSNicholas Bellinger * first extract TransportID Parameter Data Length, and make sure 1554c66ac9dbSNicholas Bellinger * the value matches up to the SCSI expected data transfer length. 1555c66ac9dbSNicholas Bellinger */ 1556c66ac9dbSNicholas Bellinger tpdl = (buf[24] & 0xff) << 24; 1557c66ac9dbSNicholas Bellinger tpdl |= (buf[25] & 0xff) << 16; 1558c66ac9dbSNicholas Bellinger tpdl |= (buf[26] & 0xff) << 8; 1559c66ac9dbSNicholas Bellinger tpdl |= buf[27] & 0xff; 1560c66ac9dbSNicholas Bellinger 1561c66ac9dbSNicholas Bellinger if ((tpdl + 28) != cmd->data_length) { 15626708bb27SAndy Grover pr_err("SPC-3 PR: Illegal tpdl: %u + 28 byte header" 1563c66ac9dbSNicholas Bellinger " does not equal CDB data_length: %u\n", tpdl, 1564c66ac9dbSNicholas Bellinger cmd->data_length); 156503e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 156603e98c9eSNicholas Bellinger ret = -EINVAL; 1567c66ac9dbSNicholas Bellinger goto out; 1568c66ac9dbSNicholas Bellinger } 1569c66ac9dbSNicholas Bellinger /* 1570c66ac9dbSNicholas Bellinger * Start processing the received transport IDs using the 1571c66ac9dbSNicholas Bellinger * receiving I_T Nexus portal's fabric dependent methods to 1572c66ac9dbSNicholas Bellinger * obtain the SCSI Initiator Port/Device Identifiers. 1573c66ac9dbSNicholas Bellinger */ 1574c66ac9dbSNicholas Bellinger ptr = &buf[28]; 1575c66ac9dbSNicholas Bellinger 1576c66ac9dbSNicholas Bellinger while (tpdl > 0) { 1577c66ac9dbSNicholas Bellinger proto_ident = (ptr[0] & 0x0f); 1578c66ac9dbSNicholas Bellinger dest_tpg = NULL; 1579c66ac9dbSNicholas Bellinger 1580c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 1581c66ac9dbSNicholas Bellinger list_for_each_entry(tmp_port, &dev->dev_sep_list, sep_list) { 1582c66ac9dbSNicholas Bellinger tmp_tpg = tmp_port->sep_tpg; 15836708bb27SAndy Grover if (!tmp_tpg) 1584c66ac9dbSNicholas Bellinger continue; 1585e3d6f909SAndy Grover tmp_tf_ops = tmp_tpg->se_tpg_tfo; 15866708bb27SAndy Grover if (!tmp_tf_ops) 1587c66ac9dbSNicholas Bellinger continue; 15886708bb27SAndy Grover if (!tmp_tf_ops->get_fabric_proto_ident || 15896708bb27SAndy Grover !tmp_tf_ops->tpg_parse_pr_out_transport_id) 1590c66ac9dbSNicholas Bellinger continue; 1591c66ac9dbSNicholas Bellinger /* 1592c66ac9dbSNicholas Bellinger * Look for the matching proto_ident provided by 1593c66ac9dbSNicholas Bellinger * the received TransportID 1594c66ac9dbSNicholas Bellinger */ 1595c66ac9dbSNicholas Bellinger tmp_proto_ident = tmp_tf_ops->get_fabric_proto_ident(tmp_tpg); 1596c66ac9dbSNicholas Bellinger if (tmp_proto_ident != proto_ident) 1597c66ac9dbSNicholas Bellinger continue; 1598c66ac9dbSNicholas Bellinger dest_rtpi = tmp_port->sep_rtpi; 1599c66ac9dbSNicholas Bellinger 1600c66ac9dbSNicholas Bellinger i_str = tmp_tf_ops->tpg_parse_pr_out_transport_id( 1601c66ac9dbSNicholas Bellinger tmp_tpg, (const char *)ptr, &tid_len, 1602c66ac9dbSNicholas Bellinger &iport_ptr); 16036708bb27SAndy Grover if (!i_str) 1604c66ac9dbSNicholas Bellinger continue; 1605c66ac9dbSNicholas Bellinger 1606c66ac9dbSNicholas Bellinger atomic_inc(&tmp_tpg->tpg_pr_ref_count); 1607c66ac9dbSNicholas Bellinger smp_mb__after_atomic_inc(); 1608c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 1609c66ac9dbSNicholas Bellinger 1610c66ac9dbSNicholas Bellinger ret = core_scsi3_tpg_depend_item(tmp_tpg); 1611c66ac9dbSNicholas Bellinger if (ret != 0) { 16126708bb27SAndy Grover pr_err(" core_scsi3_tpg_depend_item()" 1613c66ac9dbSNicholas Bellinger " for tmp_tpg\n"); 1614c66ac9dbSNicholas Bellinger atomic_dec(&tmp_tpg->tpg_pr_ref_count); 1615c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 161603e98c9eSNicholas Bellinger cmd->scsi_sense_reason = 161703e98c9eSNicholas Bellinger TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 161803e98c9eSNicholas Bellinger ret = -EINVAL; 1619c66ac9dbSNicholas Bellinger goto out; 1620c66ac9dbSNicholas Bellinger } 1621c66ac9dbSNicholas Bellinger /* 162235d1efe8SMasanari Iida * Locate the destination initiator ACL to be registered 1623c66ac9dbSNicholas Bellinger * from the decoded fabric module specific TransportID 1624c66ac9dbSNicholas Bellinger * at *i_str. 1625c66ac9dbSNicholas Bellinger */ 162628638887SRoland Dreier spin_lock_irq(&tmp_tpg->acl_node_lock); 1627c66ac9dbSNicholas Bellinger dest_node_acl = __core_tpg_get_initiator_node_acl( 1628c66ac9dbSNicholas Bellinger tmp_tpg, i_str); 1629c66ac9dbSNicholas Bellinger if (dest_node_acl) { 1630c66ac9dbSNicholas Bellinger atomic_inc(&dest_node_acl->acl_pr_ref_count); 1631c66ac9dbSNicholas Bellinger smp_mb__after_atomic_inc(); 1632c66ac9dbSNicholas Bellinger } 163328638887SRoland Dreier spin_unlock_irq(&tmp_tpg->acl_node_lock); 1634c66ac9dbSNicholas Bellinger 16356708bb27SAndy Grover if (!dest_node_acl) { 1636c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(tmp_tpg); 1637c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 1638c66ac9dbSNicholas Bellinger continue; 1639c66ac9dbSNicholas Bellinger } 1640c66ac9dbSNicholas Bellinger 1641c66ac9dbSNicholas Bellinger ret = core_scsi3_nodeacl_depend_item(dest_node_acl); 1642c66ac9dbSNicholas Bellinger if (ret != 0) { 16436708bb27SAndy Grover pr_err("configfs_depend_item() failed" 1644c66ac9dbSNicholas Bellinger " for dest_node_acl->acl_group\n"); 1645c66ac9dbSNicholas Bellinger atomic_dec(&dest_node_acl->acl_pr_ref_count); 1646c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 1647c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(tmp_tpg); 164803e98c9eSNicholas Bellinger cmd->scsi_sense_reason = 164903e98c9eSNicholas Bellinger TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 165003e98c9eSNicholas Bellinger ret = -EINVAL; 1651c66ac9dbSNicholas Bellinger goto out; 1652c66ac9dbSNicholas Bellinger } 1653c66ac9dbSNicholas Bellinger 1654c66ac9dbSNicholas Bellinger dest_tpg = tmp_tpg; 16556708bb27SAndy Grover pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node:" 1656c66ac9dbSNicholas Bellinger " %s Port RTPI: %hu\n", 1657e3d6f909SAndy Grover dest_tpg->se_tpg_tfo->get_fabric_name(), 1658c66ac9dbSNicholas Bellinger dest_node_acl->initiatorname, dest_rtpi); 1659c66ac9dbSNicholas Bellinger 1660c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 1661c66ac9dbSNicholas Bellinger break; 1662c66ac9dbSNicholas Bellinger } 1663c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 1664c66ac9dbSNicholas Bellinger 16656708bb27SAndy Grover if (!dest_tpg) { 16666708bb27SAndy Grover pr_err("SPC-3 PR SPEC_I_PT: Unable to locate" 1667c66ac9dbSNicholas Bellinger " dest_tpg\n"); 166803e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 166903e98c9eSNicholas Bellinger ret = -EINVAL; 1670c66ac9dbSNicholas Bellinger goto out; 1671c66ac9dbSNicholas Bellinger } 16728b1e1244SAndy Grover 16736708bb27SAndy Grover pr_debug("SPC-3 PR SPEC_I_PT: Got %s data_length: %u tpdl: %u" 1674c66ac9dbSNicholas Bellinger " tid_len: %d for %s + %s\n", 1675e3d6f909SAndy Grover dest_tpg->se_tpg_tfo->get_fabric_name(), cmd->data_length, 1676c66ac9dbSNicholas Bellinger tpdl, tid_len, i_str, iport_ptr); 16778b1e1244SAndy Grover 1678c66ac9dbSNicholas Bellinger if (tid_len > tpdl) { 16796708bb27SAndy Grover pr_err("SPC-3 PR SPEC_I_PT: Illegal tid_len:" 1680c66ac9dbSNicholas Bellinger " %u for Transport ID: %s\n", tid_len, ptr); 1681c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1682c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 168303e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 168403e98c9eSNicholas Bellinger ret = -EINVAL; 1685c66ac9dbSNicholas Bellinger goto out; 1686c66ac9dbSNicholas Bellinger } 1687c66ac9dbSNicholas Bellinger /* 1688c66ac9dbSNicholas Bellinger * Locate the desintation struct se_dev_entry pointer for matching 1689c66ac9dbSNicholas Bellinger * RELATIVE TARGET PORT IDENTIFIER on the receiving I_T Nexus 1690c66ac9dbSNicholas Bellinger * Target Port. 1691c66ac9dbSNicholas Bellinger */ 1692c66ac9dbSNicholas Bellinger dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, 1693c66ac9dbSNicholas Bellinger dest_rtpi); 16946708bb27SAndy Grover if (!dest_se_deve) { 16956708bb27SAndy Grover pr_err("Unable to locate %s dest_se_deve" 1696c66ac9dbSNicholas Bellinger " from destination RTPI: %hu\n", 1697e3d6f909SAndy Grover dest_tpg->se_tpg_tfo->get_fabric_name(), 1698c66ac9dbSNicholas Bellinger dest_rtpi); 1699c66ac9dbSNicholas Bellinger 1700c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1701c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 170203e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 170303e98c9eSNicholas Bellinger ret = -EINVAL; 1704c66ac9dbSNicholas Bellinger goto out; 1705c66ac9dbSNicholas Bellinger } 1706c66ac9dbSNicholas Bellinger 1707c66ac9dbSNicholas Bellinger ret = core_scsi3_lunacl_depend_item(dest_se_deve); 1708c66ac9dbSNicholas Bellinger if (ret < 0) { 17096708bb27SAndy Grover pr_err("core_scsi3_lunacl_depend_item()" 1710c66ac9dbSNicholas Bellinger " failed\n"); 1711c66ac9dbSNicholas Bellinger atomic_dec(&dest_se_deve->pr_ref_count); 1712c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 1713c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1714c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 171503e98c9eSNicholas Bellinger cmd->scsi_sense_reason = 171603e98c9eSNicholas Bellinger TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 171703e98c9eSNicholas Bellinger ret = -EINVAL; 1718c66ac9dbSNicholas Bellinger goto out; 1719c66ac9dbSNicholas Bellinger } 17208b1e1244SAndy Grover 17216708bb27SAndy Grover pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node: %s" 1722c66ac9dbSNicholas Bellinger " dest_se_deve mapped_lun: %u\n", 1723e3d6f909SAndy Grover dest_tpg->se_tpg_tfo->get_fabric_name(), 1724c66ac9dbSNicholas Bellinger dest_node_acl->initiatorname, dest_se_deve->mapped_lun); 17258b1e1244SAndy Grover 1726c66ac9dbSNicholas Bellinger /* 1727c66ac9dbSNicholas Bellinger * Skip any TransportIDs that already have a registration for 1728c66ac9dbSNicholas Bellinger * this target port. 1729c66ac9dbSNicholas Bellinger */ 1730c66ac9dbSNicholas Bellinger pr_reg_e = __core_scsi3_locate_pr_reg(dev, dest_node_acl, 1731c66ac9dbSNicholas Bellinger iport_ptr); 1732c66ac9dbSNicholas Bellinger if (pr_reg_e) { 1733c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_e); 1734c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1735c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1736c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1737c66ac9dbSNicholas Bellinger ptr += tid_len; 1738c66ac9dbSNicholas Bellinger tpdl -= tid_len; 1739c66ac9dbSNicholas Bellinger tid_len = 0; 1740c66ac9dbSNicholas Bellinger continue; 1741c66ac9dbSNicholas Bellinger } 1742c66ac9dbSNicholas Bellinger /* 1743c66ac9dbSNicholas Bellinger * Allocate a struct pr_transport_id_holder and setup 1744c66ac9dbSNicholas Bellinger * the dest_node_acl and dest_se_deve pointers for the 1745c66ac9dbSNicholas Bellinger * loop below. 1746c66ac9dbSNicholas Bellinger */ 1747c66ac9dbSNicholas Bellinger tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), 1748c66ac9dbSNicholas Bellinger GFP_KERNEL); 17496708bb27SAndy Grover if (!tidh_new) { 17506708bb27SAndy Grover pr_err("Unable to allocate tidh_new\n"); 1751c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1752c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1753c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 175403e98c9eSNicholas Bellinger cmd->scsi_sense_reason = 175503e98c9eSNicholas Bellinger TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 175603e98c9eSNicholas Bellinger ret = -ENOMEM; 1757c66ac9dbSNicholas Bellinger goto out; 1758c66ac9dbSNicholas Bellinger } 1759c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&tidh_new->dest_list); 1760c66ac9dbSNicholas Bellinger tidh_new->dest_tpg = dest_tpg; 1761c66ac9dbSNicholas Bellinger tidh_new->dest_node_acl = dest_node_acl; 1762c66ac9dbSNicholas Bellinger tidh_new->dest_se_deve = dest_se_deve; 1763c66ac9dbSNicholas Bellinger 1764c66ac9dbSNicholas Bellinger /* 1765c66ac9dbSNicholas Bellinger * Allocate, but do NOT add the registration for the 1766c66ac9dbSNicholas Bellinger * TransportID referenced SCSI Initiator port. This 1767c66ac9dbSNicholas Bellinger * done because of the following from spc4r17 in section 1768c66ac9dbSNicholas Bellinger * 6.14.3 wrt SPEC_I_PT: 1769c66ac9dbSNicholas Bellinger * 1770c66ac9dbSNicholas Bellinger * "If a registration fails for any initiator port (e.g., if th 1771c66ac9dbSNicholas Bellinger * logical unit does not have enough resources available to 1772c66ac9dbSNicholas Bellinger * hold the registration information), no registrations shall be 1773c66ac9dbSNicholas Bellinger * made, and the command shall be terminated with 1774c66ac9dbSNicholas Bellinger * CHECK CONDITION status." 1775c66ac9dbSNicholas Bellinger * 1776c66ac9dbSNicholas Bellinger * That means we call __core_scsi3_alloc_registration() here, 1777c66ac9dbSNicholas Bellinger * and then call __core_scsi3_add_registration() in the 1778c66ac9dbSNicholas Bellinger * 2nd loop which will never fail. 1779c66ac9dbSNicholas Bellinger */ 17805951146dSAndy Grover dest_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev, 1781c66ac9dbSNicholas Bellinger dest_node_acl, dest_se_deve, iport_ptr, 1782c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl); 17836708bb27SAndy Grover if (!dest_pr_reg) { 1784c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1785c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1786c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1787c66ac9dbSNicholas Bellinger kfree(tidh_new); 178803e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 178903e98c9eSNicholas Bellinger ret = -EINVAL; 1790c66ac9dbSNicholas Bellinger goto out; 1791c66ac9dbSNicholas Bellinger } 1792c66ac9dbSNicholas Bellinger tidh_new->dest_pr_reg = dest_pr_reg; 1793c66ac9dbSNicholas Bellinger list_add_tail(&tidh_new->dest_list, &tid_dest_list); 1794c66ac9dbSNicholas Bellinger 1795c66ac9dbSNicholas Bellinger ptr += tid_len; 1796c66ac9dbSNicholas Bellinger tpdl -= tid_len; 1797c66ac9dbSNicholas Bellinger tid_len = 0; 1798c66ac9dbSNicholas Bellinger 1799c66ac9dbSNicholas Bellinger } 180005d1c7c0SAndy Grover 18014949314cSAndy Grover transport_kunmap_data_sg(cmd); 180205d1c7c0SAndy Grover 1803c66ac9dbSNicholas Bellinger /* 1804c66ac9dbSNicholas Bellinger * Go ahead and create a registrations from tid_dest_list for the 1805c66ac9dbSNicholas Bellinger * SPEC_I_PT provided TransportID for the *tidh referenced dest_node_acl 1806c66ac9dbSNicholas Bellinger * and dest_se_deve. 1807c66ac9dbSNicholas Bellinger * 1808c66ac9dbSNicholas Bellinger * The SA Reservation Key from the PROUT is set for the 1809c66ac9dbSNicholas Bellinger * registration, and ALL_TG_PT is also passed. ALL_TG_PT=1 1810c66ac9dbSNicholas Bellinger * means that the TransportID Initiator port will be 1811c66ac9dbSNicholas Bellinger * registered on all of the target ports in the SCSI target device 1812c66ac9dbSNicholas Bellinger * ALL_TG_PT=0 means the registration will only be for the 1813c66ac9dbSNicholas Bellinger * SCSI target port the PROUT REGISTER with SPEC_I_PT=1 1814c66ac9dbSNicholas Bellinger * was received. 1815c66ac9dbSNicholas Bellinger */ 1816c66ac9dbSNicholas Bellinger list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) { 1817c66ac9dbSNicholas Bellinger dest_tpg = tidh->dest_tpg; 1818c66ac9dbSNicholas Bellinger dest_node_acl = tidh->dest_node_acl; 1819c66ac9dbSNicholas Bellinger dest_se_deve = tidh->dest_se_deve; 1820c66ac9dbSNicholas Bellinger dest_pr_reg = tidh->dest_pr_reg; 1821c66ac9dbSNicholas Bellinger dest_local_nexus = tidh->dest_local_nexus; 1822c66ac9dbSNicholas Bellinger 1823c66ac9dbSNicholas Bellinger list_del(&tidh->dest_list); 1824c66ac9dbSNicholas Bellinger kfree(tidh); 1825c66ac9dbSNicholas Bellinger 1826c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1827c66ac9dbSNicholas Bellinger prf_isid = core_pr_dump_initiator_port(dest_pr_reg, &i_buf[0], 1828c66ac9dbSNicholas Bellinger PR_REG_ISID_ID_LEN); 1829c66ac9dbSNicholas Bellinger 18305951146dSAndy Grover __core_scsi3_add_registration(cmd->se_dev, dest_node_acl, 1831c66ac9dbSNicholas Bellinger dest_pr_reg, 0, 0); 1832c66ac9dbSNicholas Bellinger 18336708bb27SAndy Grover pr_debug("SPC-3 PR [%s] SPEC_I_PT: Successfully" 1834c66ac9dbSNicholas Bellinger " registered Transport ID for Node: %s%s Mapped LUN:" 1835e3d6f909SAndy Grover " %u\n", dest_tpg->se_tpg_tfo->get_fabric_name(), 1836c66ac9dbSNicholas Bellinger dest_node_acl->initiatorname, (prf_isid) ? 1837c66ac9dbSNicholas Bellinger &i_buf[0] : "", dest_se_deve->mapped_lun); 1838c66ac9dbSNicholas Bellinger 1839c66ac9dbSNicholas Bellinger if (dest_local_nexus) 1840c66ac9dbSNicholas Bellinger continue; 1841c66ac9dbSNicholas Bellinger 1842c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1843c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1844c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1845c66ac9dbSNicholas Bellinger } 1846c66ac9dbSNicholas Bellinger 1847c66ac9dbSNicholas Bellinger return 0; 1848c66ac9dbSNicholas Bellinger out: 18494949314cSAndy Grover transport_kunmap_data_sg(cmd); 1850c66ac9dbSNicholas Bellinger /* 1851c66ac9dbSNicholas Bellinger * For the failure case, release everything from tid_dest_list 1852c66ac9dbSNicholas Bellinger * including *dest_pr_reg and the configfs dependances.. 1853c66ac9dbSNicholas Bellinger */ 1854c66ac9dbSNicholas Bellinger list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) { 1855c66ac9dbSNicholas Bellinger dest_tpg = tidh->dest_tpg; 1856c66ac9dbSNicholas Bellinger dest_node_acl = tidh->dest_node_acl; 1857c66ac9dbSNicholas Bellinger dest_se_deve = tidh->dest_se_deve; 1858c66ac9dbSNicholas Bellinger dest_pr_reg = tidh->dest_pr_reg; 1859c66ac9dbSNicholas Bellinger dest_local_nexus = tidh->dest_local_nexus; 1860c66ac9dbSNicholas Bellinger 1861c66ac9dbSNicholas Bellinger list_del(&tidh->dest_list); 1862c66ac9dbSNicholas Bellinger kfree(tidh); 1863c66ac9dbSNicholas Bellinger /* 1864c66ac9dbSNicholas Bellinger * Release any extra ALL_TG_PT=1 registrations for 1865c66ac9dbSNicholas Bellinger * the SPEC_I_PT=1 case. 1866c66ac9dbSNicholas Bellinger */ 1867c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, 1868c66ac9dbSNicholas Bellinger &dest_pr_reg->pr_reg_atp_list, 1869c66ac9dbSNicholas Bellinger pr_reg_atp_mem_list) { 1870c66ac9dbSNicholas Bellinger list_del(&pr_reg_tmp->pr_reg_atp_mem_list); 1871c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); 1872c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp); 1873c66ac9dbSNicholas Bellinger } 1874c66ac9dbSNicholas Bellinger 1875c66ac9dbSNicholas Bellinger kfree(dest_pr_reg->pr_aptpl_buf); 1876c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, dest_pr_reg); 1877c66ac9dbSNicholas Bellinger 1878c66ac9dbSNicholas Bellinger if (dest_local_nexus) 1879c66ac9dbSNicholas Bellinger continue; 1880c66ac9dbSNicholas Bellinger 1881c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1882c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1883c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1884c66ac9dbSNicholas Bellinger } 1885c66ac9dbSNicholas Bellinger return ret; 1886c66ac9dbSNicholas Bellinger } 1887c66ac9dbSNicholas Bellinger 1888c66ac9dbSNicholas Bellinger /* 1889c66ac9dbSNicholas Bellinger * Called with struct se_device->dev_reservation_lock held 1890c66ac9dbSNicholas Bellinger */ 1891c66ac9dbSNicholas Bellinger static int __core_scsi3_update_aptpl_buf( 1892c66ac9dbSNicholas Bellinger struct se_device *dev, 1893c66ac9dbSNicholas Bellinger unsigned char *buf, 1894c66ac9dbSNicholas Bellinger u32 pr_aptpl_buf_len, 1895c66ac9dbSNicholas Bellinger int clear_aptpl_metadata) 1896c66ac9dbSNicholas Bellinger { 1897c66ac9dbSNicholas Bellinger struct se_lun *lun; 1898c66ac9dbSNicholas Bellinger struct se_portal_group *tpg; 1899c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 1900c66ac9dbSNicholas Bellinger unsigned char tmp[512], isid_buf[32]; 1901c66ac9dbSNicholas Bellinger ssize_t len = 0; 1902c66ac9dbSNicholas Bellinger int reg_count = 0; 1903c66ac9dbSNicholas Bellinger 1904c66ac9dbSNicholas Bellinger memset(buf, 0, pr_aptpl_buf_len); 1905c66ac9dbSNicholas Bellinger /* 1906c66ac9dbSNicholas Bellinger * Called to clear metadata once APTPL has been deactivated. 1907c66ac9dbSNicholas Bellinger */ 1908c66ac9dbSNicholas Bellinger if (clear_aptpl_metadata) { 1909c66ac9dbSNicholas Bellinger snprintf(buf, pr_aptpl_buf_len, 1910c66ac9dbSNicholas Bellinger "No Registrations or Reservations\n"); 1911c66ac9dbSNicholas Bellinger return 0; 1912c66ac9dbSNicholas Bellinger } 1913c66ac9dbSNicholas Bellinger /* 1914c66ac9dbSNicholas Bellinger * Walk the registration list.. 1915c66ac9dbSNicholas Bellinger */ 19160fd97ccfSChristoph Hellwig spin_lock(&dev->t10_pr.registration_lock); 19170fd97ccfSChristoph Hellwig list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 1918c66ac9dbSNicholas Bellinger pr_reg_list) { 1919c66ac9dbSNicholas Bellinger 1920c66ac9dbSNicholas Bellinger tmp[0] = '\0'; 1921c66ac9dbSNicholas Bellinger isid_buf[0] = '\0'; 1922c66ac9dbSNicholas Bellinger tpg = pr_reg->pr_reg_nacl->se_tpg; 1923c66ac9dbSNicholas Bellinger lun = pr_reg->pr_reg_tg_pt_lun; 1924c66ac9dbSNicholas Bellinger /* 1925c66ac9dbSNicholas Bellinger * Write out any ISID value to APTPL metadata that was included 1926c66ac9dbSNicholas Bellinger * in the original registration. 1927c66ac9dbSNicholas Bellinger */ 1928c66ac9dbSNicholas Bellinger if (pr_reg->isid_present_at_reg) 1929c66ac9dbSNicholas Bellinger snprintf(isid_buf, 32, "initiator_sid=%s\n", 1930c66ac9dbSNicholas Bellinger pr_reg->pr_reg_isid); 1931c66ac9dbSNicholas Bellinger /* 1932c66ac9dbSNicholas Bellinger * Include special metadata if the pr_reg matches the 1933c66ac9dbSNicholas Bellinger * reservation holder. 1934c66ac9dbSNicholas Bellinger */ 1935c66ac9dbSNicholas Bellinger if (dev->dev_pr_res_holder == pr_reg) { 1936c66ac9dbSNicholas Bellinger snprintf(tmp, 512, "PR_REG_START: %d" 1937c66ac9dbSNicholas Bellinger "\ninitiator_fabric=%s\n" 1938c66ac9dbSNicholas Bellinger "initiator_node=%s\n%s" 1939c66ac9dbSNicholas Bellinger "sa_res_key=%llu\n" 1940c66ac9dbSNicholas Bellinger "res_holder=1\nres_type=%02x\n" 1941c66ac9dbSNicholas Bellinger "res_scope=%02x\nres_all_tg_pt=%d\n" 1942c66ac9dbSNicholas Bellinger "mapped_lun=%u\n", reg_count, 1943e3d6f909SAndy Grover tpg->se_tpg_tfo->get_fabric_name(), 1944c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->initiatorname, isid_buf, 1945c66ac9dbSNicholas Bellinger pr_reg->pr_res_key, pr_reg->pr_res_type, 1946c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope, pr_reg->pr_reg_all_tg_pt, 1947c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun); 1948c66ac9dbSNicholas Bellinger } else { 1949c66ac9dbSNicholas Bellinger snprintf(tmp, 512, "PR_REG_START: %d\n" 1950c66ac9dbSNicholas Bellinger "initiator_fabric=%s\ninitiator_node=%s\n%s" 1951c66ac9dbSNicholas Bellinger "sa_res_key=%llu\nres_holder=0\n" 1952c66ac9dbSNicholas Bellinger "res_all_tg_pt=%d\nmapped_lun=%u\n", 1953e3d6f909SAndy Grover reg_count, tpg->se_tpg_tfo->get_fabric_name(), 1954c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->initiatorname, isid_buf, 1955c66ac9dbSNicholas Bellinger pr_reg->pr_res_key, pr_reg->pr_reg_all_tg_pt, 1956c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun); 1957c66ac9dbSNicholas Bellinger } 1958c66ac9dbSNicholas Bellinger 195960d645a4SDan Carpenter if ((len + strlen(tmp) >= pr_aptpl_buf_len)) { 19606708bb27SAndy Grover pr_err("Unable to update renaming" 1961c66ac9dbSNicholas Bellinger " APTPL metadata\n"); 19620fd97ccfSChristoph Hellwig spin_unlock(&dev->t10_pr.registration_lock); 1963e3d6f909SAndy Grover return -EMSGSIZE; 1964c66ac9dbSNicholas Bellinger } 1965c66ac9dbSNicholas Bellinger len += sprintf(buf+len, "%s", tmp); 1966c66ac9dbSNicholas Bellinger 1967c66ac9dbSNicholas Bellinger /* 1968c66ac9dbSNicholas Bellinger * Include information about the associated SCSI target port. 1969c66ac9dbSNicholas Bellinger */ 1970c66ac9dbSNicholas Bellinger snprintf(tmp, 512, "target_fabric=%s\ntarget_node=%s\n" 1971c66ac9dbSNicholas Bellinger "tpgt=%hu\nport_rtpi=%hu\ntarget_lun=%u\nPR_REG_END:" 1972e3d6f909SAndy Grover " %d\n", tpg->se_tpg_tfo->get_fabric_name(), 1973e3d6f909SAndy Grover tpg->se_tpg_tfo->tpg_get_wwn(tpg), 1974e3d6f909SAndy Grover tpg->se_tpg_tfo->tpg_get_tag(tpg), 1975c66ac9dbSNicholas Bellinger lun->lun_sep->sep_rtpi, lun->unpacked_lun, reg_count); 1976c66ac9dbSNicholas Bellinger 197760d645a4SDan Carpenter if ((len + strlen(tmp) >= pr_aptpl_buf_len)) { 19786708bb27SAndy Grover pr_err("Unable to update renaming" 1979c66ac9dbSNicholas Bellinger " APTPL metadata\n"); 19800fd97ccfSChristoph Hellwig spin_unlock(&dev->t10_pr.registration_lock); 1981e3d6f909SAndy Grover return -EMSGSIZE; 1982c66ac9dbSNicholas Bellinger } 1983c66ac9dbSNicholas Bellinger len += sprintf(buf+len, "%s", tmp); 1984c66ac9dbSNicholas Bellinger reg_count++; 1985c66ac9dbSNicholas Bellinger } 19860fd97ccfSChristoph Hellwig spin_unlock(&dev->t10_pr.registration_lock); 1987c66ac9dbSNicholas Bellinger 19886708bb27SAndy Grover if (!reg_count) 1989c66ac9dbSNicholas Bellinger len += sprintf(buf+len, "No Registrations or Reservations"); 1990c66ac9dbSNicholas Bellinger 1991c66ac9dbSNicholas Bellinger return 0; 1992c66ac9dbSNicholas Bellinger } 1993c66ac9dbSNicholas Bellinger 1994c66ac9dbSNicholas Bellinger static int core_scsi3_update_aptpl_buf( 1995c66ac9dbSNicholas Bellinger struct se_device *dev, 1996c66ac9dbSNicholas Bellinger unsigned char *buf, 1997c66ac9dbSNicholas Bellinger u32 pr_aptpl_buf_len, 1998c66ac9dbSNicholas Bellinger int clear_aptpl_metadata) 1999c66ac9dbSNicholas Bellinger { 2000c66ac9dbSNicholas Bellinger int ret; 2001c66ac9dbSNicholas Bellinger 2002c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 2003c66ac9dbSNicholas Bellinger ret = __core_scsi3_update_aptpl_buf(dev, buf, pr_aptpl_buf_len, 2004c66ac9dbSNicholas Bellinger clear_aptpl_metadata); 2005c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2006c66ac9dbSNicholas Bellinger 2007c66ac9dbSNicholas Bellinger return ret; 2008c66ac9dbSNicholas Bellinger } 2009c66ac9dbSNicholas Bellinger 2010c66ac9dbSNicholas Bellinger /* 2011c66ac9dbSNicholas Bellinger * Called with struct se_device->aptpl_file_mutex held 2012c66ac9dbSNicholas Bellinger */ 2013c66ac9dbSNicholas Bellinger static int __core_scsi3_write_aptpl_to_file( 2014c66ac9dbSNicholas Bellinger struct se_device *dev, 2015c66ac9dbSNicholas Bellinger unsigned char *buf, 2016c66ac9dbSNicholas Bellinger u32 pr_aptpl_buf_len) 2017c66ac9dbSNicholas Bellinger { 20180fd97ccfSChristoph Hellwig struct t10_wwn *wwn = &dev->t10_wwn; 2019c66ac9dbSNicholas Bellinger struct file *file; 2020c66ac9dbSNicholas Bellinger struct iovec iov[1]; 2021c66ac9dbSNicholas Bellinger mm_segment_t old_fs; 2022c66ac9dbSNicholas Bellinger int flags = O_RDWR | O_CREAT | O_TRUNC; 2023c66ac9dbSNicholas Bellinger char path[512]; 2024c66ac9dbSNicholas Bellinger int ret; 2025c66ac9dbSNicholas Bellinger 2026c66ac9dbSNicholas Bellinger memset(iov, 0, sizeof(struct iovec)); 2027c66ac9dbSNicholas Bellinger memset(path, 0, 512); 2028c66ac9dbSNicholas Bellinger 202960d645a4SDan Carpenter if (strlen(&wwn->unit_serial[0]) >= 512) { 20306708bb27SAndy Grover pr_err("WWN value for struct se_device does not fit" 2031c66ac9dbSNicholas Bellinger " into path buffer\n"); 2032e3d6f909SAndy Grover return -EMSGSIZE; 2033c66ac9dbSNicholas Bellinger } 2034c66ac9dbSNicholas Bellinger 2035c66ac9dbSNicholas Bellinger snprintf(path, 512, "/var/target/pr/aptpl_%s", &wwn->unit_serial[0]); 2036c66ac9dbSNicholas Bellinger file = filp_open(path, flags, 0600); 2037c66ac9dbSNicholas Bellinger if (IS_ERR(file) || !file || !file->f_dentry) { 20386708bb27SAndy Grover pr_err("filp_open(%s) for APTPL metadata" 2039c66ac9dbSNicholas Bellinger " failed\n", path); 2040d35212f3SRoland Dreier return IS_ERR(file) ? PTR_ERR(file) : -ENOENT; 2041c66ac9dbSNicholas Bellinger } 2042c66ac9dbSNicholas Bellinger 2043c66ac9dbSNicholas Bellinger iov[0].iov_base = &buf[0]; 20446708bb27SAndy Grover if (!pr_aptpl_buf_len) 2045c66ac9dbSNicholas Bellinger iov[0].iov_len = (strlen(&buf[0]) + 1); /* Add extra for NULL */ 2046c66ac9dbSNicholas Bellinger else 2047c66ac9dbSNicholas Bellinger iov[0].iov_len = pr_aptpl_buf_len; 2048c66ac9dbSNicholas Bellinger 2049c66ac9dbSNicholas Bellinger old_fs = get_fs(); 2050c66ac9dbSNicholas Bellinger set_fs(get_ds()); 2051c66ac9dbSNicholas Bellinger ret = vfs_writev(file, &iov[0], 1, &file->f_pos); 2052c66ac9dbSNicholas Bellinger set_fs(old_fs); 2053c66ac9dbSNicholas Bellinger 2054c66ac9dbSNicholas Bellinger if (ret < 0) { 20556708bb27SAndy Grover pr_debug("Error writing APTPL metadata file: %s\n", path); 2056c66ac9dbSNicholas Bellinger filp_close(file, NULL); 2057e3d6f909SAndy Grover return -EIO; 2058c66ac9dbSNicholas Bellinger } 2059c66ac9dbSNicholas Bellinger filp_close(file, NULL); 2060c66ac9dbSNicholas Bellinger 2061c66ac9dbSNicholas Bellinger return 0; 2062c66ac9dbSNicholas Bellinger } 2063c66ac9dbSNicholas Bellinger 2064c66ac9dbSNicholas Bellinger static int core_scsi3_update_and_write_aptpl( 2065c66ac9dbSNicholas Bellinger struct se_device *dev, 2066c66ac9dbSNicholas Bellinger unsigned char *in_buf, 2067c66ac9dbSNicholas Bellinger u32 in_pr_aptpl_buf_len) 2068c66ac9dbSNicholas Bellinger { 2069c66ac9dbSNicholas Bellinger unsigned char null_buf[64], *buf; 2070c66ac9dbSNicholas Bellinger u32 pr_aptpl_buf_len; 2071c66ac9dbSNicholas Bellinger int ret, clear_aptpl_metadata = 0; 2072c66ac9dbSNicholas Bellinger /* 2073c66ac9dbSNicholas Bellinger * Can be called with a NULL pointer from PROUT service action CLEAR 2074c66ac9dbSNicholas Bellinger */ 20756708bb27SAndy Grover if (!in_buf) { 2076c66ac9dbSNicholas Bellinger memset(null_buf, 0, 64); 2077c66ac9dbSNicholas Bellinger buf = &null_buf[0]; 2078c66ac9dbSNicholas Bellinger /* 2079c66ac9dbSNicholas Bellinger * This will clear the APTPL metadata to: 2080c66ac9dbSNicholas Bellinger * "No Registrations or Reservations" status 2081c66ac9dbSNicholas Bellinger */ 2082c66ac9dbSNicholas Bellinger pr_aptpl_buf_len = 64; 2083c66ac9dbSNicholas Bellinger clear_aptpl_metadata = 1; 2084c66ac9dbSNicholas Bellinger } else { 2085c66ac9dbSNicholas Bellinger buf = in_buf; 2086c66ac9dbSNicholas Bellinger pr_aptpl_buf_len = in_pr_aptpl_buf_len; 2087c66ac9dbSNicholas Bellinger } 2088c66ac9dbSNicholas Bellinger 2089c66ac9dbSNicholas Bellinger ret = core_scsi3_update_aptpl_buf(dev, buf, pr_aptpl_buf_len, 2090c66ac9dbSNicholas Bellinger clear_aptpl_metadata); 2091c66ac9dbSNicholas Bellinger if (ret != 0) 2092e3d6f909SAndy Grover return ret; 2093c66ac9dbSNicholas Bellinger /* 2094c66ac9dbSNicholas Bellinger * __core_scsi3_write_aptpl_to_file() will call strlen() 2095c66ac9dbSNicholas Bellinger * on the passed buf to determine pr_aptpl_buf_len. 2096c66ac9dbSNicholas Bellinger */ 2097c66ac9dbSNicholas Bellinger ret = __core_scsi3_write_aptpl_to_file(dev, buf, 0); 2098c66ac9dbSNicholas Bellinger if (ret != 0) 2099e3d6f909SAndy Grover return ret; 2100c66ac9dbSNicholas Bellinger 2101c66ac9dbSNicholas Bellinger return ret; 2102c66ac9dbSNicholas Bellinger } 2103c66ac9dbSNicholas Bellinger 2104c66ac9dbSNicholas Bellinger static int core_scsi3_emulate_pro_register( 2105c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 2106c66ac9dbSNicholas Bellinger u64 res_key, 2107c66ac9dbSNicholas Bellinger u64 sa_res_key, 2108c66ac9dbSNicholas Bellinger int aptpl, 2109c66ac9dbSNicholas Bellinger int all_tg_pt, 2110c66ac9dbSNicholas Bellinger int spec_i_pt, 2111c66ac9dbSNicholas Bellinger int ignore_key) 2112c66ac9dbSNicholas Bellinger { 2113e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 21145951146dSAndy Grover struct se_device *dev = cmd->se_dev; 2115c66ac9dbSNicholas Bellinger struct se_dev_entry *se_deve; 2116e3d6f909SAndy Grover struct se_lun *se_lun = cmd->se_lun; 2117c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg; 2118c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_reg_tmp, *pr_reg_e; 21190fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 2120c66ac9dbSNicholas Bellinger /* Used for APTPL metadata w/ UNREGISTER */ 2121c66ac9dbSNicholas Bellinger unsigned char *pr_aptpl_buf = NULL; 2122c66ac9dbSNicholas Bellinger unsigned char isid_buf[PR_REG_ISID_LEN], *isid_ptr = NULL; 2123c66ac9dbSNicholas Bellinger int pr_holder = 0, ret = 0, type; 2124c66ac9dbSNicholas Bellinger 21256708bb27SAndy Grover if (!se_sess || !se_lun) { 21266708bb27SAndy Grover pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); 212703e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 212803e98c9eSNicholas Bellinger return -EINVAL; 2129c66ac9dbSNicholas Bellinger } 2130c66ac9dbSNicholas Bellinger se_tpg = se_sess->se_tpg; 2131f2083241SJörn Engel se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; 2132c66ac9dbSNicholas Bellinger 2133e3d6f909SAndy Grover if (se_tpg->se_tpg_tfo->sess_get_initiator_sid) { 2134c66ac9dbSNicholas Bellinger memset(&isid_buf[0], 0, PR_REG_ISID_LEN); 2135e3d6f909SAndy Grover se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, &isid_buf[0], 2136c66ac9dbSNicholas Bellinger PR_REG_ISID_LEN); 2137c66ac9dbSNicholas Bellinger isid_ptr = &isid_buf[0]; 2138c66ac9dbSNicholas Bellinger } 2139c66ac9dbSNicholas Bellinger /* 2140c66ac9dbSNicholas Bellinger * Follow logic from spc4r17 Section 5.7.7, Register Behaviors Table 47 2141c66ac9dbSNicholas Bellinger */ 2142c66ac9dbSNicholas Bellinger pr_reg_e = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess); 21436708bb27SAndy Grover if (!pr_reg_e) { 2144c66ac9dbSNicholas Bellinger if (res_key) { 21456708bb27SAndy Grover pr_warn("SPC-3 PR: Reservation Key non-zero" 2146c66ac9dbSNicholas Bellinger " for SA REGISTER, returning CONFLICT\n"); 214703e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 214803e98c9eSNicholas Bellinger return -EINVAL; 2149c66ac9dbSNicholas Bellinger } 2150c66ac9dbSNicholas Bellinger /* 2151c66ac9dbSNicholas Bellinger * Do nothing but return GOOD status. 2152c66ac9dbSNicholas Bellinger */ 21536708bb27SAndy Grover if (!sa_res_key) 215403e98c9eSNicholas Bellinger return 0; 2155c66ac9dbSNicholas Bellinger 21566708bb27SAndy Grover if (!spec_i_pt) { 2157c66ac9dbSNicholas Bellinger /* 2158c66ac9dbSNicholas Bellinger * Perform the Service Action REGISTER on the Initiator 2159c66ac9dbSNicholas Bellinger * Port Endpoint that the PRO was received from on the 2160c66ac9dbSNicholas Bellinger * Logical Unit of the SCSI device server. 2161c66ac9dbSNicholas Bellinger */ 21625951146dSAndy Grover ret = core_scsi3_alloc_registration(cmd->se_dev, 2163c66ac9dbSNicholas Bellinger se_sess->se_node_acl, se_deve, isid_ptr, 2164c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl, 2165c66ac9dbSNicholas Bellinger ignore_key, 0); 2166c66ac9dbSNicholas Bellinger if (ret != 0) { 21676708bb27SAndy Grover pr_err("Unable to allocate" 2168c66ac9dbSNicholas Bellinger " struct t10_pr_registration\n"); 216903e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 217003e98c9eSNicholas Bellinger return -EINVAL; 2171c66ac9dbSNicholas Bellinger } 2172c66ac9dbSNicholas Bellinger } else { 2173c66ac9dbSNicholas Bellinger /* 2174c66ac9dbSNicholas Bellinger * Register both the Initiator port that received 2175c66ac9dbSNicholas Bellinger * PROUT SA REGISTER + SPEC_I_PT=1 and extract SCSI 2176c66ac9dbSNicholas Bellinger * TransportID from Parameter list and loop through 2177c66ac9dbSNicholas Bellinger * fabric dependent parameter list while calling 2178c66ac9dbSNicholas Bellinger * logic from of core_scsi3_alloc_registration() for 2179c66ac9dbSNicholas Bellinger * each TransportID provided SCSI Initiator Port/Device 2180c66ac9dbSNicholas Bellinger */ 2181c66ac9dbSNicholas Bellinger ret = core_scsi3_decode_spec_i_port(cmd, se_tpg, 2182c66ac9dbSNicholas Bellinger isid_ptr, sa_res_key, all_tg_pt, aptpl); 2183c66ac9dbSNicholas Bellinger if (ret != 0) 2184c66ac9dbSNicholas Bellinger return ret; 2185c66ac9dbSNicholas Bellinger } 2186c66ac9dbSNicholas Bellinger /* 2187c66ac9dbSNicholas Bellinger * Nothing left to do for the APTPL=0 case. 2188c66ac9dbSNicholas Bellinger */ 21896708bb27SAndy Grover if (!aptpl) { 2190c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_active = 0; 21915951146dSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, NULL, 0); 21926708bb27SAndy Grover pr_debug("SPC-3 PR: Set APTPL Bit Deactivated for" 2193c66ac9dbSNicholas Bellinger " REGISTER\n"); 2194c66ac9dbSNicholas Bellinger return 0; 2195c66ac9dbSNicholas Bellinger } 2196c66ac9dbSNicholas Bellinger /* 2197c66ac9dbSNicholas Bellinger * Locate the newly allocated local I_T Nexus *pr_reg, and 2198c66ac9dbSNicholas Bellinger * update the APTPL metadata information using its 2199c66ac9dbSNicholas Bellinger * preallocated *pr_reg->pr_aptpl_buf. 2200c66ac9dbSNicholas Bellinger */ 22015951146dSAndy Grover pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, 2202c66ac9dbSNicholas Bellinger se_sess->se_node_acl, se_sess); 2203c66ac9dbSNicholas Bellinger 22045951146dSAndy Grover ret = core_scsi3_update_and_write_aptpl(cmd->se_dev, 2205c66ac9dbSNicholas Bellinger &pr_reg->pr_aptpl_buf[0], 2206c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_buf_len); 22076708bb27SAndy Grover if (!ret) { 2208c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_active = 1; 22096708bb27SAndy Grover pr_debug("SPC-3 PR: Set APTPL Bit Activated for REGISTER\n"); 2210c66ac9dbSNicholas Bellinger } 2211c66ac9dbSNicholas Bellinger 2212c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2213c66ac9dbSNicholas Bellinger return ret; 2214c66ac9dbSNicholas Bellinger } else { 2215c66ac9dbSNicholas Bellinger /* 2216c66ac9dbSNicholas Bellinger * Locate the existing *pr_reg via struct se_node_acl pointers 2217c66ac9dbSNicholas Bellinger */ 2218c66ac9dbSNicholas Bellinger pr_reg = pr_reg_e; 2219c66ac9dbSNicholas Bellinger type = pr_reg->pr_res_type; 2220c66ac9dbSNicholas Bellinger 22216708bb27SAndy Grover if (!ignore_key) { 2222c66ac9dbSNicholas Bellinger if (res_key != pr_reg->pr_res_key) { 22236708bb27SAndy Grover pr_err("SPC-3 PR REGISTER: Received" 2224c66ac9dbSNicholas Bellinger " res_key: 0x%016Lx does not match" 2225c66ac9dbSNicholas Bellinger " existing SA REGISTER res_key:" 2226c66ac9dbSNicholas Bellinger " 0x%016Lx\n", res_key, 2227c66ac9dbSNicholas Bellinger pr_reg->pr_res_key); 2228c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 222903e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 223003e98c9eSNicholas Bellinger return -EINVAL; 2231c66ac9dbSNicholas Bellinger } 2232c66ac9dbSNicholas Bellinger } 2233c66ac9dbSNicholas Bellinger if (spec_i_pt) { 22346708bb27SAndy Grover pr_err("SPC-3 PR UNREGISTER: SPEC_I_PT" 2235c66ac9dbSNicholas Bellinger " set while sa_res_key=0\n"); 2236c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 223703e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 223803e98c9eSNicholas Bellinger return -EINVAL; 2239c66ac9dbSNicholas Bellinger } 2240c66ac9dbSNicholas Bellinger /* 2241c66ac9dbSNicholas Bellinger * An existing ALL_TG_PT=1 registration being released 2242c66ac9dbSNicholas Bellinger * must also set ALL_TG_PT=1 in the incoming PROUT. 2243c66ac9dbSNicholas Bellinger */ 2244c66ac9dbSNicholas Bellinger if (pr_reg->pr_reg_all_tg_pt && !(all_tg_pt)) { 22456708bb27SAndy Grover pr_err("SPC-3 PR UNREGISTER: ALL_TG_PT=1" 2246c66ac9dbSNicholas Bellinger " registration exists, but ALL_TG_PT=1 bit not" 2247c66ac9dbSNicholas Bellinger " present in received PROUT\n"); 2248c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 224903e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; 225003e98c9eSNicholas Bellinger return -EINVAL; 2251c66ac9dbSNicholas Bellinger } 2252c66ac9dbSNicholas Bellinger /* 2253c66ac9dbSNicholas Bellinger * Allocate APTPL metadata buffer used for UNREGISTER ops 2254c66ac9dbSNicholas Bellinger */ 2255c66ac9dbSNicholas Bellinger if (aptpl) { 2256c66ac9dbSNicholas Bellinger pr_aptpl_buf = kzalloc(pr_tmpl->pr_aptpl_buf_len, 2257c66ac9dbSNicholas Bellinger GFP_KERNEL); 22586708bb27SAndy Grover if (!pr_aptpl_buf) { 22596708bb27SAndy Grover pr_err("Unable to allocate" 2260c66ac9dbSNicholas Bellinger " pr_aptpl_buf\n"); 2261c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 226203e98c9eSNicholas Bellinger cmd->scsi_sense_reason = 226303e98c9eSNicholas Bellinger TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 226403e98c9eSNicholas Bellinger return -EINVAL; 2265c66ac9dbSNicholas Bellinger } 2266c66ac9dbSNicholas Bellinger } 2267c66ac9dbSNicholas Bellinger /* 2268c66ac9dbSNicholas Bellinger * sa_res_key=0 Unregister Reservation Key for registered I_T 2269c66ac9dbSNicholas Bellinger * Nexus sa_res_key=1 Change Reservation Key for registered I_T 2270c66ac9dbSNicholas Bellinger * Nexus. 2271c66ac9dbSNicholas Bellinger */ 22726708bb27SAndy Grover if (!sa_res_key) { 2273c66ac9dbSNicholas Bellinger pr_holder = core_scsi3_check_implict_release( 22745951146dSAndy Grover cmd->se_dev, pr_reg); 2275c66ac9dbSNicholas Bellinger if (pr_holder < 0) { 2276c66ac9dbSNicholas Bellinger kfree(pr_aptpl_buf); 2277c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 227803e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 227903e98c9eSNicholas Bellinger return -EINVAL; 2280c66ac9dbSNicholas Bellinger } 2281c66ac9dbSNicholas Bellinger 2282c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 2283c66ac9dbSNicholas Bellinger /* 2284c66ac9dbSNicholas Bellinger * Release all ALL_TG_PT=1 for the matching SCSI Initiator Port 2285c66ac9dbSNicholas Bellinger * and matching pr_res_key. 2286c66ac9dbSNicholas Bellinger */ 2287c66ac9dbSNicholas Bellinger if (pr_reg->pr_reg_all_tg_pt) { 2288c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg_p, pr_reg_tmp, 2289c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, 2290c66ac9dbSNicholas Bellinger pr_reg_list) { 2291c66ac9dbSNicholas Bellinger 22926708bb27SAndy Grover if (!pr_reg_p->pr_reg_all_tg_pt) 2293c66ac9dbSNicholas Bellinger continue; 2294c66ac9dbSNicholas Bellinger 2295c66ac9dbSNicholas Bellinger if (pr_reg_p->pr_res_key != res_key) 2296c66ac9dbSNicholas Bellinger continue; 2297c66ac9dbSNicholas Bellinger 2298c66ac9dbSNicholas Bellinger if (pr_reg == pr_reg_p) 2299c66ac9dbSNicholas Bellinger continue; 2300c66ac9dbSNicholas Bellinger 2301c66ac9dbSNicholas Bellinger if (strcmp(pr_reg->pr_reg_nacl->initiatorname, 2302c66ac9dbSNicholas Bellinger pr_reg_p->pr_reg_nacl->initiatorname)) 2303c66ac9dbSNicholas Bellinger continue; 2304c66ac9dbSNicholas Bellinger 2305c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, 2306c66ac9dbSNicholas Bellinger pr_reg_p, NULL, 0); 2307c66ac9dbSNicholas Bellinger } 2308c66ac9dbSNicholas Bellinger } 2309c66ac9dbSNicholas Bellinger /* 2310c66ac9dbSNicholas Bellinger * Release the calling I_T Nexus registration now.. 2311c66ac9dbSNicholas Bellinger */ 23125951146dSAndy Grover __core_scsi3_free_registration(cmd->se_dev, pr_reg, 2313c66ac9dbSNicholas Bellinger NULL, 1); 2314c66ac9dbSNicholas Bellinger /* 2315c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.11.3 Unregistering 2316c66ac9dbSNicholas Bellinger * 2317c66ac9dbSNicholas Bellinger * If the persistent reservation is a registrants only 2318c66ac9dbSNicholas Bellinger * type, the device server shall establish a unit 2319c66ac9dbSNicholas Bellinger * attention condition for the initiator port associated 2320c66ac9dbSNicholas Bellinger * with every registered I_T nexus except for the I_T 2321c66ac9dbSNicholas Bellinger * nexus on which the PERSISTENT RESERVE OUT command was 2322c66ac9dbSNicholas Bellinger * received, with the additional sense code set to 2323c66ac9dbSNicholas Bellinger * RESERVATIONS RELEASED. 2324c66ac9dbSNicholas Bellinger */ 2325c66ac9dbSNicholas Bellinger if (pr_holder && 2326c66ac9dbSNicholas Bellinger ((type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY) || 2327c66ac9dbSNicholas Bellinger (type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY))) { 2328c66ac9dbSNicholas Bellinger list_for_each_entry(pr_reg_p, 2329c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, 2330c66ac9dbSNicholas Bellinger pr_reg_list) { 2331c66ac9dbSNicholas Bellinger 2332c66ac9dbSNicholas Bellinger core_scsi3_ua_allocate( 2333c66ac9dbSNicholas Bellinger pr_reg_p->pr_reg_nacl, 2334c66ac9dbSNicholas Bellinger pr_reg_p->pr_res_mapped_lun, 2335c66ac9dbSNicholas Bellinger 0x2A, 2336c66ac9dbSNicholas Bellinger ASCQ_2AH_RESERVATIONS_RELEASED); 2337c66ac9dbSNicholas Bellinger } 2338c66ac9dbSNicholas Bellinger } 2339c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 2340c66ac9dbSNicholas Bellinger 23416708bb27SAndy Grover if (!aptpl) { 2342c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_active = 0; 2343c66ac9dbSNicholas Bellinger core_scsi3_update_and_write_aptpl(dev, NULL, 0); 23446708bb27SAndy Grover pr_debug("SPC-3 PR: Set APTPL Bit Deactivated" 2345c66ac9dbSNicholas Bellinger " for UNREGISTER\n"); 2346c66ac9dbSNicholas Bellinger return 0; 2347c66ac9dbSNicholas Bellinger } 2348c66ac9dbSNicholas Bellinger 2349c66ac9dbSNicholas Bellinger ret = core_scsi3_update_and_write_aptpl(dev, 2350c66ac9dbSNicholas Bellinger &pr_aptpl_buf[0], 2351c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_buf_len); 23526708bb27SAndy Grover if (!ret) { 2353c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_active = 1; 23546708bb27SAndy Grover pr_debug("SPC-3 PR: Set APTPL Bit Activated" 2355c66ac9dbSNicholas Bellinger " for UNREGISTER\n"); 2356c66ac9dbSNicholas Bellinger } 2357c66ac9dbSNicholas Bellinger 2358c66ac9dbSNicholas Bellinger kfree(pr_aptpl_buf); 2359c66ac9dbSNicholas Bellinger return ret; 2360c66ac9dbSNicholas Bellinger } else { 2361c66ac9dbSNicholas Bellinger /* 2362c66ac9dbSNicholas Bellinger * Increment PRgeneration counter for struct se_device" 2363c66ac9dbSNicholas Bellinger * upon a successful REGISTER, see spc4r17 section 6.3.2 2364c66ac9dbSNicholas Bellinger * READ_KEYS service action. 2365c66ac9dbSNicholas Bellinger */ 2366c66ac9dbSNicholas Bellinger pr_reg->pr_res_generation = core_scsi3_pr_generation( 23675951146dSAndy Grover cmd->se_dev); 2368c66ac9dbSNicholas Bellinger pr_reg->pr_res_key = sa_res_key; 23696708bb27SAndy Grover pr_debug("SPC-3 PR [%s] REGISTER%s: Changed Reservation" 2370c66ac9dbSNicholas Bellinger " Key for %s to: 0x%016Lx PRgeneration:" 2371e3d6f909SAndy Grover " 0x%08x\n", cmd->se_tfo->get_fabric_name(), 2372c66ac9dbSNicholas Bellinger (ignore_key) ? "_AND_IGNORE_EXISTING_KEY" : "", 2373c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->initiatorname, 2374c66ac9dbSNicholas Bellinger pr_reg->pr_res_key, pr_reg->pr_res_generation); 2375c66ac9dbSNicholas Bellinger 23766708bb27SAndy Grover if (!aptpl) { 2377c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_active = 0; 2378c66ac9dbSNicholas Bellinger core_scsi3_update_and_write_aptpl(dev, NULL, 0); 2379c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 23806708bb27SAndy Grover pr_debug("SPC-3 PR: Set APTPL Bit Deactivated" 2381c66ac9dbSNicholas Bellinger " for REGISTER\n"); 2382c66ac9dbSNicholas Bellinger return 0; 2383c66ac9dbSNicholas Bellinger } 2384c66ac9dbSNicholas Bellinger 2385c66ac9dbSNicholas Bellinger ret = core_scsi3_update_and_write_aptpl(dev, 2386c66ac9dbSNicholas Bellinger &pr_aptpl_buf[0], 2387c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_buf_len); 23886708bb27SAndy Grover if (!ret) { 2389c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_active = 1; 23906708bb27SAndy Grover pr_debug("SPC-3 PR: Set APTPL Bit Activated" 2391c66ac9dbSNicholas Bellinger " for REGISTER\n"); 2392c66ac9dbSNicholas Bellinger } 2393c66ac9dbSNicholas Bellinger 2394c66ac9dbSNicholas Bellinger kfree(pr_aptpl_buf); 2395c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2396c66ac9dbSNicholas Bellinger } 2397c66ac9dbSNicholas Bellinger } 2398c66ac9dbSNicholas Bellinger return 0; 2399c66ac9dbSNicholas Bellinger } 2400c66ac9dbSNicholas Bellinger 2401c66ac9dbSNicholas Bellinger unsigned char *core_scsi3_pr_dump_type(int type) 2402c66ac9dbSNicholas Bellinger { 2403c66ac9dbSNicholas Bellinger switch (type) { 2404c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE: 2405c66ac9dbSNicholas Bellinger return "Write Exclusive Access"; 2406c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS: 2407c66ac9dbSNicholas Bellinger return "Exclusive Access"; 2408c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: 2409c66ac9dbSNicholas Bellinger return "Write Exclusive Access, Registrants Only"; 2410c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: 2411c66ac9dbSNicholas Bellinger return "Exclusive Access, Registrants Only"; 2412c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: 2413c66ac9dbSNicholas Bellinger return "Write Exclusive Access, All Registrants"; 2414c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: 2415c66ac9dbSNicholas Bellinger return "Exclusive Access, All Registrants"; 2416c66ac9dbSNicholas Bellinger default: 2417c66ac9dbSNicholas Bellinger break; 2418c66ac9dbSNicholas Bellinger } 2419c66ac9dbSNicholas Bellinger 2420c66ac9dbSNicholas Bellinger return "Unknown SPC-3 PR Type"; 2421c66ac9dbSNicholas Bellinger } 2422c66ac9dbSNicholas Bellinger 2423c66ac9dbSNicholas Bellinger static int core_scsi3_pro_reserve( 2424c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 2425c66ac9dbSNicholas Bellinger struct se_device *dev, 2426c66ac9dbSNicholas Bellinger int type, 2427c66ac9dbSNicholas Bellinger int scope, 2428c66ac9dbSNicholas Bellinger u64 res_key) 2429c66ac9dbSNicholas Bellinger { 2430e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 2431e3d6f909SAndy Grover struct se_lun *se_lun = cmd->se_lun; 2432c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_res_holder; 24330fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 2434c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 2435c66ac9dbSNicholas Bellinger int ret, prf_isid; 2436c66ac9dbSNicholas Bellinger 2437c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 2438c66ac9dbSNicholas Bellinger 24396708bb27SAndy Grover if (!se_sess || !se_lun) { 24406708bb27SAndy Grover pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); 244103e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 244203e98c9eSNicholas Bellinger return -EINVAL; 2443c66ac9dbSNicholas Bellinger } 2444c66ac9dbSNicholas Bellinger /* 2445c66ac9dbSNicholas Bellinger * Locate the existing *pr_reg via struct se_node_acl pointers 2446c66ac9dbSNicholas Bellinger */ 24475951146dSAndy Grover pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, 2448c66ac9dbSNicholas Bellinger se_sess); 24496708bb27SAndy Grover if (!pr_reg) { 24506708bb27SAndy Grover pr_err("SPC-3 PR: Unable to locate" 2451c66ac9dbSNicholas Bellinger " PR_REGISTERED *pr_reg for RESERVE\n"); 245203e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 245303e98c9eSNicholas Bellinger return -EINVAL; 2454c66ac9dbSNicholas Bellinger } 2455c66ac9dbSNicholas Bellinger /* 2456c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2457c66ac9dbSNicholas Bellinger * 2458c66ac9dbSNicholas Bellinger * An application client creates a persistent reservation by issuing 2459c66ac9dbSNicholas Bellinger * a PERSISTENT RESERVE OUT command with RESERVE service action through 2460c66ac9dbSNicholas Bellinger * a registered I_T nexus with the following parameters: 2461c66ac9dbSNicholas Bellinger * a) RESERVATION KEY set to the value of the reservation key that is 2462c66ac9dbSNicholas Bellinger * registered with the logical unit for the I_T nexus; and 2463c66ac9dbSNicholas Bellinger */ 2464c66ac9dbSNicholas Bellinger if (res_key != pr_reg->pr_res_key) { 24656708bb27SAndy Grover pr_err("SPC-3 PR RESERVE: Received res_key: 0x%016Lx" 2466c66ac9dbSNicholas Bellinger " does not match existing SA REGISTER res_key:" 2467c66ac9dbSNicholas Bellinger " 0x%016Lx\n", res_key, pr_reg->pr_res_key); 2468c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 246903e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 247003e98c9eSNicholas Bellinger return -EINVAL; 2471c66ac9dbSNicholas Bellinger } 2472c66ac9dbSNicholas Bellinger /* 2473c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2474c66ac9dbSNicholas Bellinger * 2475c66ac9dbSNicholas Bellinger * From above: 2476c66ac9dbSNicholas Bellinger * b) TYPE field and SCOPE field set to the persistent reservation 2477c66ac9dbSNicholas Bellinger * being created. 2478c66ac9dbSNicholas Bellinger * 2479c66ac9dbSNicholas Bellinger * Only one persistent reservation is allowed at a time per logical unit 2480c66ac9dbSNicholas Bellinger * and that persistent reservation has a scope of LU_SCOPE. 2481c66ac9dbSNicholas Bellinger */ 2482c66ac9dbSNicholas Bellinger if (scope != PR_SCOPE_LU_SCOPE) { 24836708bb27SAndy Grover pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope); 2484c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 248503e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 248603e98c9eSNicholas Bellinger return -EINVAL; 2487c66ac9dbSNicholas Bellinger } 2488c66ac9dbSNicholas Bellinger /* 2489c66ac9dbSNicholas Bellinger * See if we have an existing PR reservation holder pointer at 2490c66ac9dbSNicholas Bellinger * struct se_device->dev_pr_res_holder in the form struct t10_pr_registration 2491c66ac9dbSNicholas Bellinger * *pr_res_holder. 2492c66ac9dbSNicholas Bellinger */ 2493c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 2494c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 2495ee1b1b9cSAndy Grover if (pr_res_holder) { 2496c66ac9dbSNicholas Bellinger /* 2497c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2498c66ac9dbSNicholas Bellinger * 2499c66ac9dbSNicholas Bellinger * If the device server receives a PERSISTENT RESERVE OUT 2500c66ac9dbSNicholas Bellinger * command from an I_T nexus other than a persistent reservation 2501c66ac9dbSNicholas Bellinger * holder (see 5.7.10) that attempts to create a persistent 2502c66ac9dbSNicholas Bellinger * reservation when a persistent reservation already exists for 2503c66ac9dbSNicholas Bellinger * the logical unit, then the command shall be completed with 2504c66ac9dbSNicholas Bellinger * RESERVATION CONFLICT status. 2505c66ac9dbSNicholas Bellinger */ 2506c66ac9dbSNicholas Bellinger if (pr_res_holder != pr_reg) { 2507c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 25086708bb27SAndy Grover pr_err("SPC-3 PR: Attempted RESERVE from" 2509c66ac9dbSNicholas Bellinger " [%s]: %s while reservation already held by" 2510c66ac9dbSNicholas Bellinger " [%s]: %s, returning RESERVATION_CONFLICT\n", 2511e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), 2512c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, 2513e3d6f909SAndy Grover pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 2514c66ac9dbSNicholas Bellinger pr_res_holder->pr_reg_nacl->initiatorname); 2515c66ac9dbSNicholas Bellinger 2516c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2517c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 251803e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 251903e98c9eSNicholas Bellinger return -EINVAL; 2520c66ac9dbSNicholas Bellinger } 2521c66ac9dbSNicholas Bellinger /* 2522c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2523c66ac9dbSNicholas Bellinger * 2524c66ac9dbSNicholas Bellinger * If a persistent reservation holder attempts to modify the 2525c66ac9dbSNicholas Bellinger * type or scope of an existing persistent reservation, the 2526c66ac9dbSNicholas Bellinger * command shall be completed with RESERVATION CONFLICT status. 2527c66ac9dbSNicholas Bellinger */ 2528c66ac9dbSNicholas Bellinger if ((pr_res_holder->pr_res_type != type) || 2529c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_scope != scope)) { 2530c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 25316708bb27SAndy Grover pr_err("SPC-3 PR: Attempted RESERVE from" 2532c66ac9dbSNicholas Bellinger " [%s]: %s trying to change TYPE and/or SCOPE," 2533c66ac9dbSNicholas Bellinger " while reservation already held by [%s]: %s," 2534c66ac9dbSNicholas Bellinger " returning RESERVATION_CONFLICT\n", 2535e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), 2536c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, 2537e3d6f909SAndy Grover pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 2538c66ac9dbSNicholas Bellinger pr_res_holder->pr_reg_nacl->initiatorname); 2539c66ac9dbSNicholas Bellinger 2540c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2541c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 254203e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 254303e98c9eSNicholas Bellinger return -EINVAL; 2544c66ac9dbSNicholas Bellinger } 2545c66ac9dbSNicholas Bellinger /* 2546c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2547c66ac9dbSNicholas Bellinger * 2548c66ac9dbSNicholas Bellinger * If the device server receives a PERSISTENT RESERVE OUT 2549c66ac9dbSNicholas Bellinger * command with RESERVE service action where the TYPE field and 2550c66ac9dbSNicholas Bellinger * the SCOPE field contain the same values as the existing type 2551c66ac9dbSNicholas Bellinger * and scope from a persistent reservation holder, it shall not 2552c66ac9dbSNicholas Bellinger * make any change to the existing persistent reservation and 2553c66ac9dbSNicholas Bellinger * shall completethe command with GOOD status. 2554c66ac9dbSNicholas Bellinger */ 2555c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2556c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 255703e98c9eSNicholas Bellinger return 0; 2558c66ac9dbSNicholas Bellinger } 2559c66ac9dbSNicholas Bellinger /* 2560c66ac9dbSNicholas Bellinger * Otherwise, our *pr_reg becomes the PR reservation holder for said 2561c66ac9dbSNicholas Bellinger * TYPE/SCOPE. Also set the received scope and type in *pr_reg. 2562c66ac9dbSNicholas Bellinger */ 2563c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope = scope; 2564c66ac9dbSNicholas Bellinger pr_reg->pr_res_type = type; 2565c66ac9dbSNicholas Bellinger pr_reg->pr_res_holder = 1; 2566c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = pr_reg; 2567c66ac9dbSNicholas Bellinger prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], 2568c66ac9dbSNicholas Bellinger PR_REG_ISID_ID_LEN); 2569c66ac9dbSNicholas Bellinger 25706708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: RESERVE created new" 2571c66ac9dbSNicholas Bellinger " reservation holder TYPE: %s ALL_TG_PT: %d\n", 2572e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), core_scsi3_pr_dump_type(type), 2573c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); 25746708bb27SAndy Grover pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n", 2575e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), 2576c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, 2577c66ac9dbSNicholas Bellinger (prf_isid) ? &i_buf[0] : ""); 2578c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2579c66ac9dbSNicholas Bellinger 2580c66ac9dbSNicholas Bellinger if (pr_tmpl->pr_aptpl_active) { 25815951146dSAndy Grover ret = core_scsi3_update_and_write_aptpl(cmd->se_dev, 2582c66ac9dbSNicholas Bellinger &pr_reg->pr_aptpl_buf[0], 2583c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_buf_len); 25846708bb27SAndy Grover if (!ret) 25856708bb27SAndy Grover pr_debug("SPC-3 PR: Updated APTPL metadata" 2586c66ac9dbSNicholas Bellinger " for RESERVE\n"); 2587c66ac9dbSNicholas Bellinger } 2588c66ac9dbSNicholas Bellinger 2589c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2590c66ac9dbSNicholas Bellinger return 0; 2591c66ac9dbSNicholas Bellinger } 2592c66ac9dbSNicholas Bellinger 2593c66ac9dbSNicholas Bellinger static int core_scsi3_emulate_pro_reserve( 2594c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 2595c66ac9dbSNicholas Bellinger int type, 2596c66ac9dbSNicholas Bellinger int scope, 2597c66ac9dbSNicholas Bellinger u64 res_key) 2598c66ac9dbSNicholas Bellinger { 2599c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 2600c66ac9dbSNicholas Bellinger int ret = 0; 2601c66ac9dbSNicholas Bellinger 2602c66ac9dbSNicholas Bellinger switch (type) { 2603c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE: 2604c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS: 2605c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: 2606c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: 2607c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: 2608c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: 2609c66ac9dbSNicholas Bellinger ret = core_scsi3_pro_reserve(cmd, dev, type, scope, res_key); 2610c66ac9dbSNicholas Bellinger break; 2611c66ac9dbSNicholas Bellinger default: 26126708bb27SAndy Grover pr_err("SPC-3 PR: Unknown Service Action RESERVE Type:" 2613c66ac9dbSNicholas Bellinger " 0x%02x\n", type); 261403e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; 261503e98c9eSNicholas Bellinger return -EINVAL; 2616c66ac9dbSNicholas Bellinger } 2617c66ac9dbSNicholas Bellinger 2618c66ac9dbSNicholas Bellinger return ret; 2619c66ac9dbSNicholas Bellinger } 2620c66ac9dbSNicholas Bellinger 2621c66ac9dbSNicholas Bellinger /* 2622c66ac9dbSNicholas Bellinger * Called with struct se_device->dev_reservation_lock held. 2623c66ac9dbSNicholas Bellinger */ 2624c66ac9dbSNicholas Bellinger static void __core_scsi3_complete_pro_release( 2625c66ac9dbSNicholas Bellinger struct se_device *dev, 2626c66ac9dbSNicholas Bellinger struct se_node_acl *se_nacl, 2627c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 2628c66ac9dbSNicholas Bellinger int explict) 2629c66ac9dbSNicholas Bellinger { 2630c66ac9dbSNicholas Bellinger struct target_core_fabric_ops *tfo = se_nacl->se_tpg->se_tpg_tfo; 2631c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 2632c66ac9dbSNicholas Bellinger int prf_isid; 2633c66ac9dbSNicholas Bellinger 2634c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 2635c66ac9dbSNicholas Bellinger prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], 2636c66ac9dbSNicholas Bellinger PR_REG_ISID_ID_LEN); 2637c66ac9dbSNicholas Bellinger /* 2638c66ac9dbSNicholas Bellinger * Go ahead and release the current PR reservation holder. 2639c66ac9dbSNicholas Bellinger */ 2640c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = NULL; 2641c66ac9dbSNicholas Bellinger 26426708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: %s RELEASE cleared" 2643c66ac9dbSNicholas Bellinger " reservation holder TYPE: %s ALL_TG_PT: %d\n", 2644c66ac9dbSNicholas Bellinger tfo->get_fabric_name(), (explict) ? "explict" : "implict", 2645c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg->pr_res_type), 2646c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); 26476708bb27SAndy Grover pr_debug("SPC-3 PR [%s] RELEASE Node: %s%s\n", 2648c66ac9dbSNicholas Bellinger tfo->get_fabric_name(), se_nacl->initiatorname, 2649c66ac9dbSNicholas Bellinger (prf_isid) ? &i_buf[0] : ""); 2650c66ac9dbSNicholas Bellinger /* 2651c66ac9dbSNicholas Bellinger * Clear TYPE and SCOPE for the next PROUT Service Action: RESERVE 2652c66ac9dbSNicholas Bellinger */ 2653c66ac9dbSNicholas Bellinger pr_reg->pr_res_holder = pr_reg->pr_res_type = pr_reg->pr_res_scope = 0; 2654c66ac9dbSNicholas Bellinger } 2655c66ac9dbSNicholas Bellinger 2656c66ac9dbSNicholas Bellinger static int core_scsi3_emulate_pro_release( 2657c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 2658c66ac9dbSNicholas Bellinger int type, 2659c66ac9dbSNicholas Bellinger int scope, 2660c66ac9dbSNicholas Bellinger u64 res_key) 2661c66ac9dbSNicholas Bellinger { 2662c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 2663e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 2664e3d6f909SAndy Grover struct se_lun *se_lun = cmd->se_lun; 2665c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_res_holder; 26660fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 2667c66ac9dbSNicholas Bellinger int ret, all_reg = 0; 2668c66ac9dbSNicholas Bellinger 26696708bb27SAndy Grover if (!se_sess || !se_lun) { 26706708bb27SAndy Grover pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); 267103e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 267203e98c9eSNicholas Bellinger return -EINVAL; 2673c66ac9dbSNicholas Bellinger } 2674c66ac9dbSNicholas Bellinger /* 2675c66ac9dbSNicholas Bellinger * Locate the existing *pr_reg via struct se_node_acl pointers 2676c66ac9dbSNicholas Bellinger */ 2677c66ac9dbSNicholas Bellinger pr_reg = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess); 26786708bb27SAndy Grover if (!pr_reg) { 26796708bb27SAndy Grover pr_err("SPC-3 PR: Unable to locate" 2680c66ac9dbSNicholas Bellinger " PR_REGISTERED *pr_reg for RELEASE\n"); 268103e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 268203e98c9eSNicholas Bellinger return -EINVAL; 2683c66ac9dbSNicholas Bellinger } 2684c66ac9dbSNicholas Bellinger /* 2685c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.11.2 Releasing: 2686c66ac9dbSNicholas Bellinger * 2687c66ac9dbSNicholas Bellinger * If there is no persistent reservation or in response to a persistent 2688c66ac9dbSNicholas Bellinger * reservation release request from a registered I_T nexus that is not a 2689c66ac9dbSNicholas Bellinger * persistent reservation holder (see 5.7.10), the device server shall 2690c66ac9dbSNicholas Bellinger * do the following: 2691c66ac9dbSNicholas Bellinger * 2692c66ac9dbSNicholas Bellinger * a) Not release the persistent reservation, if any; 2693c66ac9dbSNicholas Bellinger * b) Not remove any registrations; and 2694c66ac9dbSNicholas Bellinger * c) Complete the command with GOOD status. 2695c66ac9dbSNicholas Bellinger */ 2696c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 2697c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 26986708bb27SAndy Grover if (!pr_res_holder) { 2699c66ac9dbSNicholas Bellinger /* 2700c66ac9dbSNicholas Bellinger * No persistent reservation, return GOOD status. 2701c66ac9dbSNicholas Bellinger */ 2702c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2703c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 270403e98c9eSNicholas Bellinger return 0; 2705c66ac9dbSNicholas Bellinger } 2706c66ac9dbSNicholas Bellinger if ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 2707c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) 2708c66ac9dbSNicholas Bellinger all_reg = 1; 2709c66ac9dbSNicholas Bellinger 2710c66ac9dbSNicholas Bellinger if ((all_reg == 0) && (pr_res_holder != pr_reg)) { 2711c66ac9dbSNicholas Bellinger /* 2712c66ac9dbSNicholas Bellinger * Non 'All Registrants' PR Type cases.. 2713c66ac9dbSNicholas Bellinger * Release request from a registered I_T nexus that is not a 2714c66ac9dbSNicholas Bellinger * persistent reservation holder. return GOOD status. 2715c66ac9dbSNicholas Bellinger */ 2716c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2717c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 271803e98c9eSNicholas Bellinger return 0; 2719c66ac9dbSNicholas Bellinger } 2720c66ac9dbSNicholas Bellinger /* 2721c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.11.2 Releasing: 2722c66ac9dbSNicholas Bellinger * 2723c66ac9dbSNicholas Bellinger * Only the persistent reservation holder (see 5.7.10) is allowed to 2724c66ac9dbSNicholas Bellinger * release a persistent reservation. 2725c66ac9dbSNicholas Bellinger * 2726c66ac9dbSNicholas Bellinger * An application client releases the persistent reservation by issuing 2727c66ac9dbSNicholas Bellinger * a PERSISTENT RESERVE OUT command with RELEASE service action through 2728c66ac9dbSNicholas Bellinger * an I_T nexus that is a persistent reservation holder with the 2729c66ac9dbSNicholas Bellinger * following parameters: 2730c66ac9dbSNicholas Bellinger * 2731c66ac9dbSNicholas Bellinger * a) RESERVATION KEY field set to the value of the reservation key 2732c66ac9dbSNicholas Bellinger * that is registered with the logical unit for the I_T nexus; 2733c66ac9dbSNicholas Bellinger */ 2734c66ac9dbSNicholas Bellinger if (res_key != pr_reg->pr_res_key) { 27356708bb27SAndy Grover pr_err("SPC-3 PR RELEASE: Received res_key: 0x%016Lx" 2736c66ac9dbSNicholas Bellinger " does not match existing SA REGISTER res_key:" 2737c66ac9dbSNicholas Bellinger " 0x%016Lx\n", res_key, pr_reg->pr_res_key); 2738c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2739c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 274003e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 274103e98c9eSNicholas Bellinger return -EINVAL; 2742c66ac9dbSNicholas Bellinger } 2743c66ac9dbSNicholas Bellinger /* 2744c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.11.2 Releasing and above: 2745c66ac9dbSNicholas Bellinger * 2746c66ac9dbSNicholas Bellinger * b) TYPE field and SCOPE field set to match the persistent 2747c66ac9dbSNicholas Bellinger * reservation being released. 2748c66ac9dbSNicholas Bellinger */ 2749c66ac9dbSNicholas Bellinger if ((pr_res_holder->pr_res_type != type) || 2750c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_scope != scope)) { 2751c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 27526708bb27SAndy Grover pr_err("SPC-3 PR RELEASE: Attempted to release" 2753c66ac9dbSNicholas Bellinger " reservation from [%s]: %s with different TYPE " 2754c66ac9dbSNicholas Bellinger "and/or SCOPE while reservation already held by" 2755c66ac9dbSNicholas Bellinger " [%s]: %s, returning RESERVATION_CONFLICT\n", 2756e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), 2757c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, 2758e3d6f909SAndy Grover pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 2759c66ac9dbSNicholas Bellinger pr_res_holder->pr_reg_nacl->initiatorname); 2760c66ac9dbSNicholas Bellinger 2761c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2762c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 276303e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 276403e98c9eSNicholas Bellinger return -EINVAL; 2765c66ac9dbSNicholas Bellinger } 2766c66ac9dbSNicholas Bellinger /* 2767c66ac9dbSNicholas Bellinger * In response to a persistent reservation release request from the 2768c66ac9dbSNicholas Bellinger * persistent reservation holder the device server shall perform a 2769c66ac9dbSNicholas Bellinger * release by doing the following as an uninterrupted series of actions: 2770c66ac9dbSNicholas Bellinger * a) Release the persistent reservation; 2771c66ac9dbSNicholas Bellinger * b) Not remove any registration(s); 2772c66ac9dbSNicholas Bellinger * c) If the released persistent reservation is a registrants only type 2773c66ac9dbSNicholas Bellinger * or all registrants type persistent reservation, 2774c66ac9dbSNicholas Bellinger * the device server shall establish a unit attention condition for 2775c66ac9dbSNicholas Bellinger * the initiator port associated with every regis- 2776c66ac9dbSNicholas Bellinger * tered I_T nexus other than I_T nexus on which the PERSISTENT 2777c66ac9dbSNicholas Bellinger * RESERVE OUT command with RELEASE service action was received, 2778c66ac9dbSNicholas Bellinger * with the additional sense code set to RESERVATIONS RELEASED; and 2779c66ac9dbSNicholas Bellinger * d) If the persistent reservation is of any other type, the device 2780c66ac9dbSNicholas Bellinger * server shall not establish a unit attention condition. 2781c66ac9dbSNicholas Bellinger */ 2782c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, se_sess->se_node_acl, 2783c66ac9dbSNicholas Bellinger pr_reg, 1); 2784c66ac9dbSNicholas Bellinger 2785c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2786c66ac9dbSNicholas Bellinger 2787c66ac9dbSNicholas Bellinger if ((type != PR_TYPE_WRITE_EXCLUSIVE_REGONLY) && 2788c66ac9dbSNicholas Bellinger (type != PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) && 2789c66ac9dbSNicholas Bellinger (type != PR_TYPE_WRITE_EXCLUSIVE_ALLREG) && 2790c66ac9dbSNicholas Bellinger (type != PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { 2791c66ac9dbSNicholas Bellinger /* 2792c66ac9dbSNicholas Bellinger * If no UNIT ATTENTION conditions will be established for 2793c66ac9dbSNicholas Bellinger * PR_TYPE_WRITE_EXCLUSIVE or PR_TYPE_EXCLUSIVE_ACCESS 2794c66ac9dbSNicholas Bellinger * go ahead and check for APTPL=1 update+write below 2795c66ac9dbSNicholas Bellinger */ 2796c66ac9dbSNicholas Bellinger goto write_aptpl; 2797c66ac9dbSNicholas Bellinger } 2798c66ac9dbSNicholas Bellinger 2799c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 2800c66ac9dbSNicholas Bellinger list_for_each_entry(pr_reg_p, &pr_tmpl->registration_list, 2801c66ac9dbSNicholas Bellinger pr_reg_list) { 2802c66ac9dbSNicholas Bellinger /* 2803c66ac9dbSNicholas Bellinger * Do not establish a UNIT ATTENTION condition 2804c66ac9dbSNicholas Bellinger * for the calling I_T Nexus 2805c66ac9dbSNicholas Bellinger */ 2806c66ac9dbSNicholas Bellinger if (pr_reg_p == pr_reg) 2807c66ac9dbSNicholas Bellinger continue; 2808c66ac9dbSNicholas Bellinger 2809c66ac9dbSNicholas Bellinger core_scsi3_ua_allocate(pr_reg_p->pr_reg_nacl, 2810c66ac9dbSNicholas Bellinger pr_reg_p->pr_res_mapped_lun, 2811c66ac9dbSNicholas Bellinger 0x2A, ASCQ_2AH_RESERVATIONS_RELEASED); 2812c66ac9dbSNicholas Bellinger } 2813c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 2814c66ac9dbSNicholas Bellinger 2815c66ac9dbSNicholas Bellinger write_aptpl: 2816c66ac9dbSNicholas Bellinger if (pr_tmpl->pr_aptpl_active) { 28175951146dSAndy Grover ret = core_scsi3_update_and_write_aptpl(cmd->se_dev, 2818c66ac9dbSNicholas Bellinger &pr_reg->pr_aptpl_buf[0], 2819c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_buf_len); 28206708bb27SAndy Grover if (!ret) 28216708bb27SAndy Grover pr_debug("SPC-3 PR: Updated APTPL metadata for RELEASE\n"); 2822c66ac9dbSNicholas Bellinger } 2823c66ac9dbSNicholas Bellinger 2824c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2825c66ac9dbSNicholas Bellinger return 0; 2826c66ac9dbSNicholas Bellinger } 2827c66ac9dbSNicholas Bellinger 2828c66ac9dbSNicholas Bellinger static int core_scsi3_emulate_pro_clear( 2829c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 2830c66ac9dbSNicholas Bellinger u64 res_key) 2831c66ac9dbSNicholas Bellinger { 2832c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 2833c66ac9dbSNicholas Bellinger struct se_node_acl *pr_reg_nacl; 2834e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 28350fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 2836c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder; 2837c66ac9dbSNicholas Bellinger u32 pr_res_mapped_lun = 0; 2838c66ac9dbSNicholas Bellinger int calling_it_nexus = 0; 2839c66ac9dbSNicholas Bellinger /* 2840c66ac9dbSNicholas Bellinger * Locate the existing *pr_reg via struct se_node_acl pointers 2841c66ac9dbSNicholas Bellinger */ 28425951146dSAndy Grover pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, 2843c66ac9dbSNicholas Bellinger se_sess->se_node_acl, se_sess); 28446708bb27SAndy Grover if (!pr_reg_n) { 28456708bb27SAndy Grover pr_err("SPC-3 PR: Unable to locate" 2846c66ac9dbSNicholas Bellinger " PR_REGISTERED *pr_reg for CLEAR\n"); 284703e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 284803e98c9eSNicholas Bellinger return -EINVAL; 2849c66ac9dbSNicholas Bellinger } 2850c66ac9dbSNicholas Bellinger /* 2851c66ac9dbSNicholas Bellinger * From spc4r17 section 5.7.11.6, Clearing: 2852c66ac9dbSNicholas Bellinger * 2853c66ac9dbSNicholas Bellinger * Any application client may release the persistent reservation and 2854c66ac9dbSNicholas Bellinger * remove all registrations from a device server by issuing a 2855c66ac9dbSNicholas Bellinger * PERSISTENT RESERVE OUT command with CLEAR service action through a 2856c66ac9dbSNicholas Bellinger * registered I_T nexus with the following parameter: 2857c66ac9dbSNicholas Bellinger * 2858c66ac9dbSNicholas Bellinger * a) RESERVATION KEY field set to the value of the reservation key 2859c66ac9dbSNicholas Bellinger * that is registered with the logical unit for the I_T nexus. 2860c66ac9dbSNicholas Bellinger */ 2861c66ac9dbSNicholas Bellinger if (res_key != pr_reg_n->pr_res_key) { 28626708bb27SAndy Grover pr_err("SPC-3 PR REGISTER: Received" 2863c66ac9dbSNicholas Bellinger " res_key: 0x%016Lx does not match" 2864c66ac9dbSNicholas Bellinger " existing SA REGISTER res_key:" 2865c66ac9dbSNicholas Bellinger " 0x%016Lx\n", res_key, pr_reg_n->pr_res_key); 2866c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 286703e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 286803e98c9eSNicholas Bellinger return -EINVAL; 2869c66ac9dbSNicholas Bellinger } 2870c66ac9dbSNicholas Bellinger /* 2871c66ac9dbSNicholas Bellinger * a) Release the persistent reservation, if any; 2872c66ac9dbSNicholas Bellinger */ 2873c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 2874c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 2875c66ac9dbSNicholas Bellinger if (pr_res_holder) { 2876c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 2877c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, pr_res_nacl, 2878c66ac9dbSNicholas Bellinger pr_res_holder, 0); 2879c66ac9dbSNicholas Bellinger } 2880c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2881c66ac9dbSNicholas Bellinger /* 2882c66ac9dbSNicholas Bellinger * b) Remove all registration(s) (see spc4r17 5.7.7); 2883c66ac9dbSNicholas Bellinger */ 2884c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 2885c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 2886c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 2887c66ac9dbSNicholas Bellinger 2888c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 2889c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 2890c66ac9dbSNicholas Bellinger pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; 2891c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, NULL, 2892c66ac9dbSNicholas Bellinger calling_it_nexus); 2893c66ac9dbSNicholas Bellinger /* 2894c66ac9dbSNicholas Bellinger * e) Establish a unit attention condition for the initiator 2895c66ac9dbSNicholas Bellinger * port associated with every registered I_T nexus other 2896c66ac9dbSNicholas Bellinger * than the I_T nexus on which the PERSISTENT RESERVE OUT 2897c66ac9dbSNicholas Bellinger * command with CLEAR service action was received, with the 2898c66ac9dbSNicholas Bellinger * additional sense code set to RESERVATIONS PREEMPTED. 2899c66ac9dbSNicholas Bellinger */ 29006708bb27SAndy Grover if (!calling_it_nexus) 2901c66ac9dbSNicholas Bellinger core_scsi3_ua_allocate(pr_reg_nacl, pr_res_mapped_lun, 2902c66ac9dbSNicholas Bellinger 0x2A, ASCQ_2AH_RESERVATIONS_PREEMPTED); 2903c66ac9dbSNicholas Bellinger } 2904c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 2905c66ac9dbSNicholas Bellinger 29066708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: CLEAR complete\n", 2907e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name()); 2908c66ac9dbSNicholas Bellinger 2909c66ac9dbSNicholas Bellinger if (pr_tmpl->pr_aptpl_active) { 29105951146dSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, NULL, 0); 29116708bb27SAndy Grover pr_debug("SPC-3 PR: Updated APTPL metadata" 2912c66ac9dbSNicholas Bellinger " for CLEAR\n"); 2913c66ac9dbSNicholas Bellinger } 2914c66ac9dbSNicholas Bellinger 2915c66ac9dbSNicholas Bellinger core_scsi3_pr_generation(dev); 2916c66ac9dbSNicholas Bellinger return 0; 2917c66ac9dbSNicholas Bellinger } 2918c66ac9dbSNicholas Bellinger 2919c66ac9dbSNicholas Bellinger /* 2920c66ac9dbSNicholas Bellinger * Called with struct se_device->dev_reservation_lock held. 2921c66ac9dbSNicholas Bellinger */ 2922c66ac9dbSNicholas Bellinger static void __core_scsi3_complete_pro_preempt( 2923c66ac9dbSNicholas Bellinger struct se_device *dev, 2924c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 2925c66ac9dbSNicholas Bellinger struct list_head *preempt_and_abort_list, 2926c66ac9dbSNicholas Bellinger int type, 2927c66ac9dbSNicholas Bellinger int scope, 2928c66ac9dbSNicholas Bellinger int abort) 2929c66ac9dbSNicholas Bellinger { 2930c66ac9dbSNicholas Bellinger struct se_node_acl *nacl = pr_reg->pr_reg_nacl; 2931c66ac9dbSNicholas Bellinger struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; 2932c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 2933c66ac9dbSNicholas Bellinger int prf_isid; 2934c66ac9dbSNicholas Bellinger 2935c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 2936c66ac9dbSNicholas Bellinger prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], 2937c66ac9dbSNicholas Bellinger PR_REG_ISID_ID_LEN); 2938c66ac9dbSNicholas Bellinger /* 2939c66ac9dbSNicholas Bellinger * Do an implict RELEASE of the existing reservation. 2940c66ac9dbSNicholas Bellinger */ 2941c66ac9dbSNicholas Bellinger if (dev->dev_pr_res_holder) 2942c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, nacl, 2943c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder, 0); 2944c66ac9dbSNicholas Bellinger 2945c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = pr_reg; 2946c66ac9dbSNicholas Bellinger pr_reg->pr_res_holder = 1; 2947c66ac9dbSNicholas Bellinger pr_reg->pr_res_type = type; 2948c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope = scope; 2949c66ac9dbSNicholas Bellinger 29506708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: PREEMPT%s created new" 2951c66ac9dbSNicholas Bellinger " reservation holder TYPE: %s ALL_TG_PT: %d\n", 2952c66ac9dbSNicholas Bellinger tfo->get_fabric_name(), (abort) ? "_AND_ABORT" : "", 2953c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(type), 2954c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); 29556708bb27SAndy Grover pr_debug("SPC-3 PR [%s] PREEMPT%s from Node: %s%s\n", 2956c66ac9dbSNicholas Bellinger tfo->get_fabric_name(), (abort) ? "_AND_ABORT" : "", 2957c66ac9dbSNicholas Bellinger nacl->initiatorname, (prf_isid) ? &i_buf[0] : ""); 2958c66ac9dbSNicholas Bellinger /* 2959c66ac9dbSNicholas Bellinger * For PREEMPT_AND_ABORT, add the preempting reservation's 2960c66ac9dbSNicholas Bellinger * struct t10_pr_registration to the list that will be compared 2961c66ac9dbSNicholas Bellinger * against received CDBs.. 2962c66ac9dbSNicholas Bellinger */ 2963c66ac9dbSNicholas Bellinger if (preempt_and_abort_list) 2964c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg->pr_reg_abort_list, 2965c66ac9dbSNicholas Bellinger preempt_and_abort_list); 2966c66ac9dbSNicholas Bellinger } 2967c66ac9dbSNicholas Bellinger 2968c66ac9dbSNicholas Bellinger static void core_scsi3_release_preempt_and_abort( 2969c66ac9dbSNicholas Bellinger struct list_head *preempt_and_abort_list, 2970c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg_holder) 2971c66ac9dbSNicholas Bellinger { 2972c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp; 2973c66ac9dbSNicholas Bellinger 2974c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, preempt_and_abort_list, 2975c66ac9dbSNicholas Bellinger pr_reg_abort_list) { 2976c66ac9dbSNicholas Bellinger 2977c66ac9dbSNicholas Bellinger list_del(&pr_reg->pr_reg_abort_list); 2978c66ac9dbSNicholas Bellinger if (pr_reg_holder == pr_reg) 2979c66ac9dbSNicholas Bellinger continue; 2980c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_holder) { 29816708bb27SAndy Grover pr_warn("pr_reg->pr_res_holder still set\n"); 2982c66ac9dbSNicholas Bellinger continue; 2983c66ac9dbSNicholas Bellinger } 2984c66ac9dbSNicholas Bellinger 2985c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve = NULL; 2986c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = NULL; 2987c66ac9dbSNicholas Bellinger kfree(pr_reg->pr_aptpl_buf); 2988c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 2989c66ac9dbSNicholas Bellinger } 2990c66ac9dbSNicholas Bellinger } 2991c66ac9dbSNicholas Bellinger 2992c66ac9dbSNicholas Bellinger static int core_scsi3_pro_preempt( 2993c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 2994c66ac9dbSNicholas Bellinger int type, 2995c66ac9dbSNicholas Bellinger int scope, 2996c66ac9dbSNicholas Bellinger u64 res_key, 2997c66ac9dbSNicholas Bellinger u64 sa_res_key, 2998c66ac9dbSNicholas Bellinger int abort) 2999c66ac9dbSNicholas Bellinger { 30005951146dSAndy Grover struct se_device *dev = cmd->se_dev; 3001c66ac9dbSNicholas Bellinger struct se_node_acl *pr_reg_nacl; 3002e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 3003d0f474e5SRoland Dreier LIST_HEAD(preempt_and_abort_list); 3004c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder; 30050fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 3006c66ac9dbSNicholas Bellinger u32 pr_res_mapped_lun = 0; 3007c66ac9dbSNicholas Bellinger int all_reg = 0, calling_it_nexus = 0, released_regs = 0; 3008c66ac9dbSNicholas Bellinger int prh_type = 0, prh_scope = 0, ret; 3009c66ac9dbSNicholas Bellinger 301003e98c9eSNicholas Bellinger if (!se_sess) { 301103e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 301203e98c9eSNicholas Bellinger return -EINVAL; 301303e98c9eSNicholas Bellinger } 3014c66ac9dbSNicholas Bellinger 30155951146dSAndy Grover pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, 3016c66ac9dbSNicholas Bellinger se_sess); 30176708bb27SAndy Grover if (!pr_reg_n) { 30186708bb27SAndy Grover pr_err("SPC-3 PR: Unable to locate" 3019c66ac9dbSNicholas Bellinger " PR_REGISTERED *pr_reg for PREEMPT%s\n", 3020c66ac9dbSNicholas Bellinger (abort) ? "_AND_ABORT" : ""); 302103e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 302203e98c9eSNicholas Bellinger return -EINVAL; 3023c66ac9dbSNicholas Bellinger } 3024c66ac9dbSNicholas Bellinger if (pr_reg_n->pr_res_key != res_key) { 3025c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 302603e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 302703e98c9eSNicholas Bellinger return -EINVAL; 3028c66ac9dbSNicholas Bellinger } 3029c66ac9dbSNicholas Bellinger if (scope != PR_SCOPE_LU_SCOPE) { 30306708bb27SAndy Grover pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope); 3031c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 303203e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 303303e98c9eSNicholas Bellinger return -EINVAL; 3034c66ac9dbSNicholas Bellinger } 3035c66ac9dbSNicholas Bellinger 3036c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 3037c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 3038c66ac9dbSNicholas Bellinger if (pr_res_holder && 3039c66ac9dbSNicholas Bellinger ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 3040c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG))) 3041c66ac9dbSNicholas Bellinger all_reg = 1; 3042c66ac9dbSNicholas Bellinger 30436708bb27SAndy Grover if (!all_reg && !sa_res_key) { 3044c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3045c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 304603e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 304703e98c9eSNicholas Bellinger return -EINVAL; 3048c66ac9dbSNicholas Bellinger } 3049c66ac9dbSNicholas Bellinger /* 3050c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.11.4.4 Removing Registrations: 3051c66ac9dbSNicholas Bellinger * 3052c66ac9dbSNicholas Bellinger * If the SERVICE ACTION RESERVATION KEY field does not identify a 3053c66ac9dbSNicholas Bellinger * persistent reservation holder or there is no persistent reservation 3054c66ac9dbSNicholas Bellinger * holder (i.e., there is no persistent reservation), then the device 3055c66ac9dbSNicholas Bellinger * server shall perform a preempt by doing the following in an 3056c66ac9dbSNicholas Bellinger * uninterrupted series of actions. (See below..) 3057c66ac9dbSNicholas Bellinger */ 30586708bb27SAndy Grover if (!pr_res_holder || (pr_res_holder->pr_res_key != sa_res_key)) { 3059c66ac9dbSNicholas Bellinger /* 3060c66ac9dbSNicholas Bellinger * No existing or SA Reservation Key matching reservations.. 3061c66ac9dbSNicholas Bellinger * 3062c66ac9dbSNicholas Bellinger * PROUT SA PREEMPT with All Registrant type reservations are 3063c66ac9dbSNicholas Bellinger * allowed to be processed without a matching SA Reservation Key 3064c66ac9dbSNicholas Bellinger */ 3065c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 3066c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 3067c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 3068c66ac9dbSNicholas Bellinger /* 3069c66ac9dbSNicholas Bellinger * Removing of registrations in non all registrants 3070c66ac9dbSNicholas Bellinger * type reservations without a matching SA reservation 3071c66ac9dbSNicholas Bellinger * key. 3072c66ac9dbSNicholas Bellinger * 3073c66ac9dbSNicholas Bellinger * a) Remove the registrations for all I_T nexuses 3074c66ac9dbSNicholas Bellinger * specified by the SERVICE ACTION RESERVATION KEY 3075c66ac9dbSNicholas Bellinger * field; 3076c66ac9dbSNicholas Bellinger * b) Ignore the contents of the SCOPE and TYPE fields; 3077c66ac9dbSNicholas Bellinger * c) Process tasks as defined in 5.7.1; and 3078c66ac9dbSNicholas Bellinger * d) Establish a unit attention condition for the 3079c66ac9dbSNicholas Bellinger * initiator port associated with every I_T nexus 3080c66ac9dbSNicholas Bellinger * that lost its registration other than the I_T 3081c66ac9dbSNicholas Bellinger * nexus on which the PERSISTENT RESERVE OUT command 3082c66ac9dbSNicholas Bellinger * was received, with the additional sense code set 3083c66ac9dbSNicholas Bellinger * to REGISTRATIONS PREEMPTED. 3084c66ac9dbSNicholas Bellinger */ 30856708bb27SAndy Grover if (!all_reg) { 3086c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_key != sa_res_key) 3087c66ac9dbSNicholas Bellinger continue; 3088c66ac9dbSNicholas Bellinger 3089c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 3090c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 3091c66ac9dbSNicholas Bellinger pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; 3092c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, 3093c66ac9dbSNicholas Bellinger (abort) ? &preempt_and_abort_list : 3094c66ac9dbSNicholas Bellinger NULL, calling_it_nexus); 3095c66ac9dbSNicholas Bellinger released_regs++; 3096c66ac9dbSNicholas Bellinger } else { 3097c66ac9dbSNicholas Bellinger /* 3098c66ac9dbSNicholas Bellinger * Case for any existing all registrants type 3099c66ac9dbSNicholas Bellinger * reservation, follow logic in spc4r17 section 3100c66ac9dbSNicholas Bellinger * 5.7.11.4 Preempting, Table 52 and Figure 7. 3101c66ac9dbSNicholas Bellinger * 3102c66ac9dbSNicholas Bellinger * For a ZERO SA Reservation key, release 3103c66ac9dbSNicholas Bellinger * all other registrations and do an implict 3104c66ac9dbSNicholas Bellinger * release of active persistent reservation. 3105c66ac9dbSNicholas Bellinger * 3106c66ac9dbSNicholas Bellinger * For a non-ZERO SA Reservation key, only 3107c66ac9dbSNicholas Bellinger * release the matching reservation key from 3108c66ac9dbSNicholas Bellinger * registrations. 3109c66ac9dbSNicholas Bellinger */ 3110c66ac9dbSNicholas Bellinger if ((sa_res_key) && 3111c66ac9dbSNicholas Bellinger (pr_reg->pr_res_key != sa_res_key)) 3112c66ac9dbSNicholas Bellinger continue; 3113c66ac9dbSNicholas Bellinger 3114c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 3115c66ac9dbSNicholas Bellinger if (calling_it_nexus) 3116c66ac9dbSNicholas Bellinger continue; 3117c66ac9dbSNicholas Bellinger 3118c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 3119c66ac9dbSNicholas Bellinger pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; 3120c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, 3121c66ac9dbSNicholas Bellinger (abort) ? &preempt_and_abort_list : 3122c66ac9dbSNicholas Bellinger NULL, 0); 3123c66ac9dbSNicholas Bellinger released_regs++; 3124c66ac9dbSNicholas Bellinger } 31256708bb27SAndy Grover if (!calling_it_nexus) 3126c66ac9dbSNicholas Bellinger core_scsi3_ua_allocate(pr_reg_nacl, 3127c66ac9dbSNicholas Bellinger pr_res_mapped_lun, 0x2A, 31289e08e34eSMarco Sanvido ASCQ_2AH_REGISTRATIONS_PREEMPTED); 3129c66ac9dbSNicholas Bellinger } 3130c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 3131c66ac9dbSNicholas Bellinger /* 3132c66ac9dbSNicholas Bellinger * If a PERSISTENT RESERVE OUT with a PREEMPT service action or 3133c66ac9dbSNicholas Bellinger * a PREEMPT AND ABORT service action sets the SERVICE ACTION 3134c66ac9dbSNicholas Bellinger * RESERVATION KEY field to a value that does not match any 3135c66ac9dbSNicholas Bellinger * registered reservation key, then the device server shall 3136c66ac9dbSNicholas Bellinger * complete the command with RESERVATION CONFLICT status. 3137c66ac9dbSNicholas Bellinger */ 31386708bb27SAndy Grover if (!released_regs) { 3139c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3140c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 314103e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 314203e98c9eSNicholas Bellinger return -EINVAL; 3143c66ac9dbSNicholas Bellinger } 3144c66ac9dbSNicholas Bellinger /* 3145c66ac9dbSNicholas Bellinger * For an existing all registrants type reservation 3146c66ac9dbSNicholas Bellinger * with a zero SA rservation key, preempt the existing 3147c66ac9dbSNicholas Bellinger * reservation with the new PR type and scope. 3148c66ac9dbSNicholas Bellinger */ 3149c66ac9dbSNicholas Bellinger if (pr_res_holder && all_reg && !(sa_res_key)) { 3150c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_preempt(dev, pr_reg_n, 3151c66ac9dbSNicholas Bellinger (abort) ? &preempt_and_abort_list : NULL, 3152c66ac9dbSNicholas Bellinger type, scope, abort); 3153c66ac9dbSNicholas Bellinger 3154c66ac9dbSNicholas Bellinger if (abort) 3155c66ac9dbSNicholas Bellinger core_scsi3_release_preempt_and_abort( 3156c66ac9dbSNicholas Bellinger &preempt_and_abort_list, pr_reg_n); 3157c66ac9dbSNicholas Bellinger } 3158c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3159c66ac9dbSNicholas Bellinger 3160c66ac9dbSNicholas Bellinger if (pr_tmpl->pr_aptpl_active) { 31615951146dSAndy Grover ret = core_scsi3_update_and_write_aptpl(cmd->se_dev, 3162c66ac9dbSNicholas Bellinger &pr_reg_n->pr_aptpl_buf[0], 3163c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_buf_len); 31646708bb27SAndy Grover if (!ret) 31656708bb27SAndy Grover pr_debug("SPC-3 PR: Updated APTPL" 3166c66ac9dbSNicholas Bellinger " metadata for PREEMPT%s\n", (abort) ? 3167c66ac9dbSNicholas Bellinger "_AND_ABORT" : ""); 3168c66ac9dbSNicholas Bellinger } 3169c66ac9dbSNicholas Bellinger 3170c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 31715951146dSAndy Grover core_scsi3_pr_generation(cmd->se_dev); 3172c66ac9dbSNicholas Bellinger return 0; 3173c66ac9dbSNicholas Bellinger } 3174c66ac9dbSNicholas Bellinger /* 3175c66ac9dbSNicholas Bellinger * The PREEMPTing SA reservation key matches that of the 3176c66ac9dbSNicholas Bellinger * existing persistent reservation, first, we check if 3177c66ac9dbSNicholas Bellinger * we are preempting our own reservation. 3178c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.11.4.3 Preempting 3179c66ac9dbSNicholas Bellinger * persistent reservations and registration handling 3180c66ac9dbSNicholas Bellinger * 3181c66ac9dbSNicholas Bellinger * If an all registrants persistent reservation is not 3182c66ac9dbSNicholas Bellinger * present, it is not an error for the persistent 3183c66ac9dbSNicholas Bellinger * reservation holder to preempt itself (i.e., a 3184c66ac9dbSNicholas Bellinger * PERSISTENT RESERVE OUT with a PREEMPT service action 3185c66ac9dbSNicholas Bellinger * or a PREEMPT AND ABORT service action with the 3186c66ac9dbSNicholas Bellinger * SERVICE ACTION RESERVATION KEY value equal to the 3187c66ac9dbSNicholas Bellinger * persistent reservation holder's reservation key that 3188c66ac9dbSNicholas Bellinger * is received from the persistent reservation holder). 3189c66ac9dbSNicholas Bellinger * In that case, the device server shall establish the 3190c66ac9dbSNicholas Bellinger * new persistent reservation and maintain the 3191c66ac9dbSNicholas Bellinger * registration. 3192c66ac9dbSNicholas Bellinger */ 3193c66ac9dbSNicholas Bellinger prh_type = pr_res_holder->pr_res_type; 3194c66ac9dbSNicholas Bellinger prh_scope = pr_res_holder->pr_res_scope; 3195c66ac9dbSNicholas Bellinger /* 3196c66ac9dbSNicholas Bellinger * If the SERVICE ACTION RESERVATION KEY field identifies a 3197c66ac9dbSNicholas Bellinger * persistent reservation holder (see 5.7.10), the device 3198c66ac9dbSNicholas Bellinger * server shall perform a preempt by doing the following as 3199c66ac9dbSNicholas Bellinger * an uninterrupted series of actions: 3200c66ac9dbSNicholas Bellinger * 3201c66ac9dbSNicholas Bellinger * a) Release the persistent reservation for the holder 3202c66ac9dbSNicholas Bellinger * identified by the SERVICE ACTION RESERVATION KEY field; 3203c66ac9dbSNicholas Bellinger */ 3204c66ac9dbSNicholas Bellinger if (pr_reg_n != pr_res_holder) 3205c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, 3206c66ac9dbSNicholas Bellinger pr_res_holder->pr_reg_nacl, 3207c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder, 0); 3208c66ac9dbSNicholas Bellinger /* 3209c66ac9dbSNicholas Bellinger * b) Remove the registrations for all I_T nexuses identified 3210c66ac9dbSNicholas Bellinger * by the SERVICE ACTION RESERVATION KEY field, except the 3211c66ac9dbSNicholas Bellinger * I_T nexus that is being used for the PERSISTENT RESERVE 3212c66ac9dbSNicholas Bellinger * OUT command. If an all registrants persistent reservation 3213c66ac9dbSNicholas Bellinger * is present and the SERVICE ACTION RESERVATION KEY field 3214c66ac9dbSNicholas Bellinger * is set to zero, then all registrations shall be removed 3215c66ac9dbSNicholas Bellinger * except for that of the I_T nexus that is being used for 3216c66ac9dbSNicholas Bellinger * the PERSISTENT RESERVE OUT command; 3217c66ac9dbSNicholas Bellinger */ 3218c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 3219c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 3220c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 3221c66ac9dbSNicholas Bellinger 3222c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 3223c66ac9dbSNicholas Bellinger if (calling_it_nexus) 3224c66ac9dbSNicholas Bellinger continue; 3225c66ac9dbSNicholas Bellinger 3226c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_key != sa_res_key) 3227c66ac9dbSNicholas Bellinger continue; 3228c66ac9dbSNicholas Bellinger 3229c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 3230c66ac9dbSNicholas Bellinger pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; 3231c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, 3232c66ac9dbSNicholas Bellinger (abort) ? &preempt_and_abort_list : NULL, 3233c66ac9dbSNicholas Bellinger calling_it_nexus); 3234c66ac9dbSNicholas Bellinger /* 3235c66ac9dbSNicholas Bellinger * e) Establish a unit attention condition for the initiator 3236c66ac9dbSNicholas Bellinger * port associated with every I_T nexus that lost its 3237c66ac9dbSNicholas Bellinger * persistent reservation and/or registration, with the 3238c66ac9dbSNicholas Bellinger * additional sense code set to REGISTRATIONS PREEMPTED; 3239c66ac9dbSNicholas Bellinger */ 3240c66ac9dbSNicholas Bellinger core_scsi3_ua_allocate(pr_reg_nacl, pr_res_mapped_lun, 0x2A, 32419e08e34eSMarco Sanvido ASCQ_2AH_REGISTRATIONS_PREEMPTED); 3242c66ac9dbSNicholas Bellinger } 3243c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 3244c66ac9dbSNicholas Bellinger /* 3245c66ac9dbSNicholas Bellinger * c) Establish a persistent reservation for the preempting 3246c66ac9dbSNicholas Bellinger * I_T nexus using the contents of the SCOPE and TYPE fields; 3247c66ac9dbSNicholas Bellinger */ 3248c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_preempt(dev, pr_reg_n, 3249c66ac9dbSNicholas Bellinger (abort) ? &preempt_and_abort_list : NULL, 3250c66ac9dbSNicholas Bellinger type, scope, abort); 3251c66ac9dbSNicholas Bellinger /* 3252c66ac9dbSNicholas Bellinger * d) Process tasks as defined in 5.7.1; 3253c66ac9dbSNicholas Bellinger * e) See above.. 3254c66ac9dbSNicholas Bellinger * f) If the type or scope has changed, then for every I_T nexus 3255c66ac9dbSNicholas Bellinger * whose reservation key was not removed, except for the I_T 3256c66ac9dbSNicholas Bellinger * nexus on which the PERSISTENT RESERVE OUT command was 3257c66ac9dbSNicholas Bellinger * received, the device server shall establish a unit 3258c66ac9dbSNicholas Bellinger * attention condition for the initiator port associated with 3259c66ac9dbSNicholas Bellinger * that I_T nexus, with the additional sense code set to 3260c66ac9dbSNicholas Bellinger * RESERVATIONS RELEASED. If the type or scope have not 3261c66ac9dbSNicholas Bellinger * changed, then no unit attention condition(s) shall be 3262c66ac9dbSNicholas Bellinger * established for this reason. 3263c66ac9dbSNicholas Bellinger */ 3264c66ac9dbSNicholas Bellinger if ((prh_type != type) || (prh_scope != scope)) { 3265c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 3266c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 3267c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 3268c66ac9dbSNicholas Bellinger 3269c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 3270c66ac9dbSNicholas Bellinger if (calling_it_nexus) 3271c66ac9dbSNicholas Bellinger continue; 3272c66ac9dbSNicholas Bellinger 3273c66ac9dbSNicholas Bellinger core_scsi3_ua_allocate(pr_reg->pr_reg_nacl, 3274c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun, 0x2A, 3275c66ac9dbSNicholas Bellinger ASCQ_2AH_RESERVATIONS_RELEASED); 3276c66ac9dbSNicholas Bellinger } 3277c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 3278c66ac9dbSNicholas Bellinger } 3279c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3280c66ac9dbSNicholas Bellinger /* 3281c66ac9dbSNicholas Bellinger * Call LUN_RESET logic upon list of struct t10_pr_registration, 3282c66ac9dbSNicholas Bellinger * All received CDBs for the matching existing reservation and 3283c66ac9dbSNicholas Bellinger * registrations undergo ABORT_TASK logic. 3284c66ac9dbSNicholas Bellinger * 3285c66ac9dbSNicholas Bellinger * From there, core_scsi3_release_preempt_and_abort() will 3286c66ac9dbSNicholas Bellinger * release every registration in the list (which have already 3287c66ac9dbSNicholas Bellinger * been removed from the primary pr_reg list), except the 3288c66ac9dbSNicholas Bellinger * new persistent reservation holder, the calling Initiator Port. 3289c66ac9dbSNicholas Bellinger */ 3290c66ac9dbSNicholas Bellinger if (abort) { 3291c66ac9dbSNicholas Bellinger core_tmr_lun_reset(dev, NULL, &preempt_and_abort_list, cmd); 3292c66ac9dbSNicholas Bellinger core_scsi3_release_preempt_and_abort(&preempt_and_abort_list, 3293c66ac9dbSNicholas Bellinger pr_reg_n); 3294c66ac9dbSNicholas Bellinger } 3295c66ac9dbSNicholas Bellinger 3296c66ac9dbSNicholas Bellinger if (pr_tmpl->pr_aptpl_active) { 32975951146dSAndy Grover ret = core_scsi3_update_and_write_aptpl(cmd->se_dev, 3298c66ac9dbSNicholas Bellinger &pr_reg_n->pr_aptpl_buf[0], 3299c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_buf_len); 33006708bb27SAndy Grover if (!ret) 33016708bb27SAndy Grover pr_debug("SPC-3 PR: Updated APTPL metadata for PREEMPT" 3302c66ac9dbSNicholas Bellinger "%s\n", (abort) ? "_AND_ABORT" : ""); 3303c66ac9dbSNicholas Bellinger } 3304c66ac9dbSNicholas Bellinger 3305c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 33065951146dSAndy Grover core_scsi3_pr_generation(cmd->se_dev); 3307c66ac9dbSNicholas Bellinger return 0; 3308c66ac9dbSNicholas Bellinger } 3309c66ac9dbSNicholas Bellinger 3310c66ac9dbSNicholas Bellinger static int core_scsi3_emulate_pro_preempt( 3311c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 3312c66ac9dbSNicholas Bellinger int type, 3313c66ac9dbSNicholas Bellinger int scope, 3314c66ac9dbSNicholas Bellinger u64 res_key, 3315c66ac9dbSNicholas Bellinger u64 sa_res_key, 3316c66ac9dbSNicholas Bellinger int abort) 3317c66ac9dbSNicholas Bellinger { 3318c66ac9dbSNicholas Bellinger int ret = 0; 3319c66ac9dbSNicholas Bellinger 3320c66ac9dbSNicholas Bellinger switch (type) { 3321c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE: 3322c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS: 3323c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: 3324c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: 3325c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: 3326c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: 3327c66ac9dbSNicholas Bellinger ret = core_scsi3_pro_preempt(cmd, type, scope, 3328c66ac9dbSNicholas Bellinger res_key, sa_res_key, abort); 3329c66ac9dbSNicholas Bellinger break; 3330c66ac9dbSNicholas Bellinger default: 33316708bb27SAndy Grover pr_err("SPC-3 PR: Unknown Service Action PREEMPT%s" 3332c66ac9dbSNicholas Bellinger " Type: 0x%02x\n", (abort) ? "_AND_ABORT" : "", type); 333303e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; 333403e98c9eSNicholas Bellinger return -EINVAL; 3335c66ac9dbSNicholas Bellinger } 3336c66ac9dbSNicholas Bellinger 3337c66ac9dbSNicholas Bellinger return ret; 3338c66ac9dbSNicholas Bellinger } 3339c66ac9dbSNicholas Bellinger 3340c66ac9dbSNicholas Bellinger 3341c66ac9dbSNicholas Bellinger static int core_scsi3_emulate_pro_register_and_move( 3342c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 3343c66ac9dbSNicholas Bellinger u64 res_key, 3344c66ac9dbSNicholas Bellinger u64 sa_res_key, 3345c66ac9dbSNicholas Bellinger int aptpl, 3346c66ac9dbSNicholas Bellinger int unreg) 3347c66ac9dbSNicholas Bellinger { 3348e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 33495951146dSAndy Grover struct se_device *dev = cmd->se_dev; 335028168905SJörn Engel struct se_dev_entry *dest_se_deve = NULL; 3351e3d6f909SAndy Grover struct se_lun *se_lun = cmd->se_lun; 3352c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl, *pr_reg_nacl, *dest_node_acl = NULL; 3353c66ac9dbSNicholas Bellinger struct se_port *se_port; 3354c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg, *dest_se_tpg = NULL; 3355c66ac9dbSNicholas Bellinger struct target_core_fabric_ops *dest_tf_ops = NULL, *tf_ops; 3356c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_res_holder, *dest_pr_reg; 33570fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 335805d1c7c0SAndy Grover unsigned char *buf; 3359c66ac9dbSNicholas Bellinger unsigned char *initiator_str; 3360c66ac9dbSNicholas Bellinger char *iport_ptr = NULL, dest_iport[64], i_buf[PR_REG_ISID_ID_LEN]; 3361c66ac9dbSNicholas Bellinger u32 tid_len, tmp_tid_len; 3362c66ac9dbSNicholas Bellinger int new_reg = 0, type, scope, ret, matching_iname, prf_isid; 3363c66ac9dbSNicholas Bellinger unsigned short rtpi; 3364c66ac9dbSNicholas Bellinger unsigned char proto_ident; 3365c66ac9dbSNicholas Bellinger 33666708bb27SAndy Grover if (!se_sess || !se_lun) { 33676708bb27SAndy Grover pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); 336803e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 336903e98c9eSNicholas Bellinger return -EINVAL; 3370c66ac9dbSNicholas Bellinger } 3371c66ac9dbSNicholas Bellinger memset(dest_iport, 0, 64); 3372c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 3373c66ac9dbSNicholas Bellinger se_tpg = se_sess->se_tpg; 3374e3d6f909SAndy Grover tf_ops = se_tpg->se_tpg_tfo; 3375c66ac9dbSNicholas Bellinger /* 3376c66ac9dbSNicholas Bellinger * Follow logic from spc4r17 Section 5.7.8, Table 50 -- 3377c66ac9dbSNicholas Bellinger * Register behaviors for a REGISTER AND MOVE service action 3378c66ac9dbSNicholas Bellinger * 3379c66ac9dbSNicholas Bellinger * Locate the existing *pr_reg via struct se_node_acl pointers 3380c66ac9dbSNicholas Bellinger */ 33815951146dSAndy Grover pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, 3382c66ac9dbSNicholas Bellinger se_sess); 33836708bb27SAndy Grover if (!pr_reg) { 33846708bb27SAndy Grover pr_err("SPC-3 PR: Unable to locate PR_REGISTERED" 3385c66ac9dbSNicholas Bellinger " *pr_reg for REGISTER_AND_MOVE\n"); 338603e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 338703e98c9eSNicholas Bellinger return -EINVAL; 3388c66ac9dbSNicholas Bellinger } 3389c66ac9dbSNicholas Bellinger /* 3390c66ac9dbSNicholas Bellinger * The provided reservation key much match the existing reservation key 3391c66ac9dbSNicholas Bellinger * provided during this initiator's I_T nexus registration. 3392c66ac9dbSNicholas Bellinger */ 3393c66ac9dbSNicholas Bellinger if (res_key != pr_reg->pr_res_key) { 33946708bb27SAndy Grover pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received" 3395c66ac9dbSNicholas Bellinger " res_key: 0x%016Lx does not match existing SA REGISTER" 3396c66ac9dbSNicholas Bellinger " res_key: 0x%016Lx\n", res_key, pr_reg->pr_res_key); 3397c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 339803e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 339903e98c9eSNicholas Bellinger return -EINVAL; 3400c66ac9dbSNicholas Bellinger } 3401c66ac9dbSNicholas Bellinger /* 3402c66ac9dbSNicholas Bellinger * The service active reservation key needs to be non zero 3403c66ac9dbSNicholas Bellinger */ 34046708bb27SAndy Grover if (!sa_res_key) { 34056708bb27SAndy Grover pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received zero" 3406c66ac9dbSNicholas Bellinger " sa_res_key\n"); 3407c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 340803e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 340903e98c9eSNicholas Bellinger return -EINVAL; 3410c66ac9dbSNicholas Bellinger } 341105d1c7c0SAndy Grover 3412c66ac9dbSNicholas Bellinger /* 3413c66ac9dbSNicholas Bellinger * Determine the Relative Target Port Identifier where the reservation 3414c66ac9dbSNicholas Bellinger * will be moved to for the TransportID containing SCSI initiator WWN 3415c66ac9dbSNicholas Bellinger * information. 3416c66ac9dbSNicholas Bellinger */ 34174949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3418c66ac9dbSNicholas Bellinger rtpi = (buf[18] & 0xff) << 8; 3419c66ac9dbSNicholas Bellinger rtpi |= buf[19] & 0xff; 3420c66ac9dbSNicholas Bellinger tid_len = (buf[20] & 0xff) << 24; 3421c66ac9dbSNicholas Bellinger tid_len |= (buf[21] & 0xff) << 16; 3422c66ac9dbSNicholas Bellinger tid_len |= (buf[22] & 0xff) << 8; 3423c66ac9dbSNicholas Bellinger tid_len |= buf[23] & 0xff; 34244949314cSAndy Grover transport_kunmap_data_sg(cmd); 342505d1c7c0SAndy Grover buf = NULL; 3426c66ac9dbSNicholas Bellinger 3427c66ac9dbSNicholas Bellinger if ((tid_len + 24) != cmd->data_length) { 34286708bb27SAndy Grover pr_err("SPC-3 PR: Illegal tid_len: %u + 24 byte header" 3429c66ac9dbSNicholas Bellinger " does not equal CDB data_length: %u\n", tid_len, 3430c66ac9dbSNicholas Bellinger cmd->data_length); 3431c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 343203e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 343303e98c9eSNicholas Bellinger return -EINVAL; 3434c66ac9dbSNicholas Bellinger } 3435c66ac9dbSNicholas Bellinger 3436c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 3437c66ac9dbSNicholas Bellinger list_for_each_entry(se_port, &dev->dev_sep_list, sep_list) { 3438c66ac9dbSNicholas Bellinger if (se_port->sep_rtpi != rtpi) 3439c66ac9dbSNicholas Bellinger continue; 3440c66ac9dbSNicholas Bellinger dest_se_tpg = se_port->sep_tpg; 34416708bb27SAndy Grover if (!dest_se_tpg) 3442c66ac9dbSNicholas Bellinger continue; 3443e3d6f909SAndy Grover dest_tf_ops = dest_se_tpg->se_tpg_tfo; 34446708bb27SAndy Grover if (!dest_tf_ops) 3445c66ac9dbSNicholas Bellinger continue; 3446c66ac9dbSNicholas Bellinger 3447c66ac9dbSNicholas Bellinger atomic_inc(&dest_se_tpg->tpg_pr_ref_count); 3448c66ac9dbSNicholas Bellinger smp_mb__after_atomic_inc(); 3449c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 3450c66ac9dbSNicholas Bellinger 3451c66ac9dbSNicholas Bellinger ret = core_scsi3_tpg_depend_item(dest_se_tpg); 3452c66ac9dbSNicholas Bellinger if (ret != 0) { 34536708bb27SAndy Grover pr_err("core_scsi3_tpg_depend_item() failed" 3454c66ac9dbSNicholas Bellinger " for dest_se_tpg\n"); 3455c66ac9dbSNicholas Bellinger atomic_dec(&dest_se_tpg->tpg_pr_ref_count); 3456c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 3457c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 345803e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 345903e98c9eSNicholas Bellinger return -EINVAL; 3460c66ac9dbSNicholas Bellinger } 3461c66ac9dbSNicholas Bellinger 3462c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 3463c66ac9dbSNicholas Bellinger break; 3464c66ac9dbSNicholas Bellinger } 3465c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 3466c66ac9dbSNicholas Bellinger 34676708bb27SAndy Grover if (!dest_se_tpg || !dest_tf_ops) { 34686708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate" 3469c66ac9dbSNicholas Bellinger " fabric ops from Relative Target Port Identifier:" 3470c66ac9dbSNicholas Bellinger " %hu\n", rtpi); 3471c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 347203e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 347303e98c9eSNicholas Bellinger return -EINVAL; 3474c66ac9dbSNicholas Bellinger } 347505d1c7c0SAndy Grover 34764949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3477c66ac9dbSNicholas Bellinger proto_ident = (buf[24] & 0x0f); 34788b1e1244SAndy Grover 34796708bb27SAndy Grover pr_debug("SPC-3 PR REGISTER_AND_MOVE: Extracted Protocol Identifier:" 3480c66ac9dbSNicholas Bellinger " 0x%02x\n", proto_ident); 34818b1e1244SAndy Grover 3482c66ac9dbSNicholas Bellinger if (proto_ident != dest_tf_ops->get_fabric_proto_ident(dest_se_tpg)) { 34836708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: Received" 3484c66ac9dbSNicholas Bellinger " proto_ident: 0x%02x does not match ident: 0x%02x" 3485c66ac9dbSNicholas Bellinger " from fabric: %s\n", proto_ident, 3486c66ac9dbSNicholas Bellinger dest_tf_ops->get_fabric_proto_ident(dest_se_tpg), 3487c66ac9dbSNicholas Bellinger dest_tf_ops->get_fabric_name()); 348803e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 348903e98c9eSNicholas Bellinger ret = -EINVAL; 3490c66ac9dbSNicholas Bellinger goto out; 3491c66ac9dbSNicholas Bellinger } 3492c66ac9dbSNicholas Bellinger if (dest_tf_ops->tpg_parse_pr_out_transport_id == NULL) { 34936708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: Fabric does not" 3494c66ac9dbSNicholas Bellinger " containg a valid tpg_parse_pr_out_transport_id" 3495c66ac9dbSNicholas Bellinger " function pointer\n"); 349603e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 349703e98c9eSNicholas Bellinger ret = -EINVAL; 3498c66ac9dbSNicholas Bellinger goto out; 3499c66ac9dbSNicholas Bellinger } 3500c66ac9dbSNicholas Bellinger initiator_str = dest_tf_ops->tpg_parse_pr_out_transport_id(dest_se_tpg, 3501c66ac9dbSNicholas Bellinger (const char *)&buf[24], &tmp_tid_len, &iport_ptr); 35026708bb27SAndy Grover if (!initiator_str) { 35036708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate" 3504c66ac9dbSNicholas Bellinger " initiator_str from Transport ID\n"); 350503e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 350603e98c9eSNicholas Bellinger ret = -EINVAL; 3507c66ac9dbSNicholas Bellinger goto out; 3508c66ac9dbSNicholas Bellinger } 3509c66ac9dbSNicholas Bellinger 35104949314cSAndy Grover transport_kunmap_data_sg(cmd); 351105d1c7c0SAndy Grover buf = NULL; 351205d1c7c0SAndy Grover 35136708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Extracted initiator %s identifier: %s" 3514c66ac9dbSNicholas Bellinger " %s\n", dest_tf_ops->get_fabric_name(), (iport_ptr != NULL) ? 3515c66ac9dbSNicholas Bellinger "port" : "device", initiator_str, (iport_ptr != NULL) ? 3516c66ac9dbSNicholas Bellinger iport_ptr : ""); 3517c66ac9dbSNicholas Bellinger /* 3518c66ac9dbSNicholas Bellinger * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service 3519c66ac9dbSNicholas Bellinger * action specifies a TransportID that is the same as the initiator port 3520c66ac9dbSNicholas Bellinger * of the I_T nexus for the command received, then the command shall 3521c66ac9dbSNicholas Bellinger * be terminated with CHECK CONDITION status, with the sense key set to 3522c66ac9dbSNicholas Bellinger * ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD 3523c66ac9dbSNicholas Bellinger * IN PARAMETER LIST. 3524c66ac9dbSNicholas Bellinger */ 3525c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 3526c66ac9dbSNicholas Bellinger matching_iname = (!strcmp(initiator_str, 3527c66ac9dbSNicholas Bellinger pr_reg_nacl->initiatorname)) ? 1 : 0; 35286708bb27SAndy Grover if (!matching_iname) 3529c66ac9dbSNicholas Bellinger goto after_iport_check; 3530c66ac9dbSNicholas Bellinger 35316708bb27SAndy Grover if (!iport_ptr || !pr_reg->isid_present_at_reg) { 35326708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s" 3533c66ac9dbSNicholas Bellinger " matches: %s on received I_T Nexus\n", initiator_str, 3534c66ac9dbSNicholas Bellinger pr_reg_nacl->initiatorname); 353503e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 353603e98c9eSNicholas Bellinger ret = -EINVAL; 3537c66ac9dbSNicholas Bellinger goto out; 3538c66ac9dbSNicholas Bellinger } 35396708bb27SAndy Grover if (!strcmp(iport_ptr, pr_reg->pr_reg_isid)) { 35406708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s %s" 3541c66ac9dbSNicholas Bellinger " matches: %s %s on received I_T Nexus\n", 3542c66ac9dbSNicholas Bellinger initiator_str, iport_ptr, pr_reg_nacl->initiatorname, 3543c66ac9dbSNicholas Bellinger pr_reg->pr_reg_isid); 354403e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 354503e98c9eSNicholas Bellinger ret = -EINVAL; 3546c66ac9dbSNicholas Bellinger goto out; 3547c66ac9dbSNicholas Bellinger } 3548c66ac9dbSNicholas Bellinger after_iport_check: 3549c66ac9dbSNicholas Bellinger /* 3550c66ac9dbSNicholas Bellinger * Locate the destination struct se_node_acl from the received Transport ID 3551c66ac9dbSNicholas Bellinger */ 355228638887SRoland Dreier spin_lock_irq(&dest_se_tpg->acl_node_lock); 3553c66ac9dbSNicholas Bellinger dest_node_acl = __core_tpg_get_initiator_node_acl(dest_se_tpg, 3554c66ac9dbSNicholas Bellinger initiator_str); 3555c66ac9dbSNicholas Bellinger if (dest_node_acl) { 3556c66ac9dbSNicholas Bellinger atomic_inc(&dest_node_acl->acl_pr_ref_count); 3557c66ac9dbSNicholas Bellinger smp_mb__after_atomic_inc(); 3558c66ac9dbSNicholas Bellinger } 355928638887SRoland Dreier spin_unlock_irq(&dest_se_tpg->acl_node_lock); 3560c66ac9dbSNicholas Bellinger 35616708bb27SAndy Grover if (!dest_node_acl) { 35626708bb27SAndy Grover pr_err("Unable to locate %s dest_node_acl for" 3563c66ac9dbSNicholas Bellinger " TransportID%s\n", dest_tf_ops->get_fabric_name(), 3564c66ac9dbSNicholas Bellinger initiator_str); 356503e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 356603e98c9eSNicholas Bellinger ret = -EINVAL; 3567c66ac9dbSNicholas Bellinger goto out; 3568c66ac9dbSNicholas Bellinger } 3569c66ac9dbSNicholas Bellinger ret = core_scsi3_nodeacl_depend_item(dest_node_acl); 3570c66ac9dbSNicholas Bellinger if (ret != 0) { 35716708bb27SAndy Grover pr_err("core_scsi3_nodeacl_depend_item() for" 3572c66ac9dbSNicholas Bellinger " dest_node_acl\n"); 3573c66ac9dbSNicholas Bellinger atomic_dec(&dest_node_acl->acl_pr_ref_count); 3574c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 3575c66ac9dbSNicholas Bellinger dest_node_acl = NULL; 357603e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 357703e98c9eSNicholas Bellinger ret = -EINVAL; 3578c66ac9dbSNicholas Bellinger goto out; 3579c66ac9dbSNicholas Bellinger } 35808b1e1244SAndy Grover 35816708bb27SAndy Grover pr_debug("SPC-3 PR REGISTER_AND_MOVE: Found %s dest_node_acl:" 3582c66ac9dbSNicholas Bellinger " %s from TransportID\n", dest_tf_ops->get_fabric_name(), 3583c66ac9dbSNicholas Bellinger dest_node_acl->initiatorname); 35848b1e1244SAndy Grover 3585c66ac9dbSNicholas Bellinger /* 3586c66ac9dbSNicholas Bellinger * Locate the struct se_dev_entry pointer for the matching RELATIVE TARGET 3587c66ac9dbSNicholas Bellinger * PORT IDENTIFIER. 3588c66ac9dbSNicholas Bellinger */ 3589c66ac9dbSNicholas Bellinger dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, rtpi); 35906708bb27SAndy Grover if (!dest_se_deve) { 35916708bb27SAndy Grover pr_err("Unable to locate %s dest_se_deve from RTPI:" 3592c66ac9dbSNicholas Bellinger " %hu\n", dest_tf_ops->get_fabric_name(), rtpi); 359303e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 359403e98c9eSNicholas Bellinger ret = -EINVAL; 3595c66ac9dbSNicholas Bellinger goto out; 3596c66ac9dbSNicholas Bellinger } 3597c66ac9dbSNicholas Bellinger 3598c66ac9dbSNicholas Bellinger ret = core_scsi3_lunacl_depend_item(dest_se_deve); 3599c66ac9dbSNicholas Bellinger if (ret < 0) { 36006708bb27SAndy Grover pr_err("core_scsi3_lunacl_depend_item() failed\n"); 3601c66ac9dbSNicholas Bellinger atomic_dec(&dest_se_deve->pr_ref_count); 3602c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 3603c66ac9dbSNicholas Bellinger dest_se_deve = NULL; 360403e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 360503e98c9eSNicholas Bellinger ret = -EINVAL; 3606c66ac9dbSNicholas Bellinger goto out; 3607c66ac9dbSNicholas Bellinger } 36088b1e1244SAndy Grover 36096708bb27SAndy Grover pr_debug("SPC-3 PR REGISTER_AND_MOVE: Located %s node %s LUN" 3610c66ac9dbSNicholas Bellinger " ACL for dest_se_deve->mapped_lun: %u\n", 3611c66ac9dbSNicholas Bellinger dest_tf_ops->get_fabric_name(), dest_node_acl->initiatorname, 3612c66ac9dbSNicholas Bellinger dest_se_deve->mapped_lun); 36138b1e1244SAndy Grover 3614c66ac9dbSNicholas Bellinger /* 3615c66ac9dbSNicholas Bellinger * A persistent reservation needs to already existing in order to 3616c66ac9dbSNicholas Bellinger * successfully complete the REGISTER_AND_MOVE service action.. 3617c66ac9dbSNicholas Bellinger */ 3618c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 3619c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 36206708bb27SAndy Grover if (!pr_res_holder) { 36216708bb27SAndy Grover pr_warn("SPC-3 PR REGISTER_AND_MOVE: No reservation" 3622c66ac9dbSNicholas Bellinger " currently held\n"); 3623c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 362403e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; 362503e98c9eSNicholas Bellinger ret = -EINVAL; 3626c66ac9dbSNicholas Bellinger goto out; 3627c66ac9dbSNicholas Bellinger } 3628c66ac9dbSNicholas Bellinger /* 3629c66ac9dbSNicholas Bellinger * The received on I_T Nexus must be the reservation holder. 3630c66ac9dbSNicholas Bellinger * 3631c66ac9dbSNicholas Bellinger * From spc4r17 section 5.7.8 Table 50 -- 3632c66ac9dbSNicholas Bellinger * Register behaviors for a REGISTER AND MOVE service action 3633c66ac9dbSNicholas Bellinger */ 3634c66ac9dbSNicholas Bellinger if (pr_res_holder != pr_reg) { 36356708bb27SAndy Grover pr_warn("SPC-3 PR REGISTER_AND_MOVE: Calling I_T" 3636c66ac9dbSNicholas Bellinger " Nexus is not reservation holder\n"); 3637c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 363803e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 363903e98c9eSNicholas Bellinger ret = -EINVAL; 3640c66ac9dbSNicholas Bellinger goto out; 3641c66ac9dbSNicholas Bellinger } 3642c66ac9dbSNicholas Bellinger /* 3643c66ac9dbSNicholas Bellinger * From spc4r17 section 5.7.8: registering and moving reservation 3644c66ac9dbSNicholas Bellinger * 3645c66ac9dbSNicholas Bellinger * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service 3646c66ac9dbSNicholas Bellinger * action is received and the established persistent reservation is a 3647c66ac9dbSNicholas Bellinger * Write Exclusive - All Registrants type or Exclusive Access - 3648c66ac9dbSNicholas Bellinger * All Registrants type reservation, then the command shall be completed 3649c66ac9dbSNicholas Bellinger * with RESERVATION CONFLICT status. 3650c66ac9dbSNicholas Bellinger */ 3651c66ac9dbSNicholas Bellinger if ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 3652c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { 36536708bb27SAndy Grover pr_warn("SPC-3 PR REGISTER_AND_MOVE: Unable to move" 3654c66ac9dbSNicholas Bellinger " reservation for type: %s\n", 3655c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_res_holder->pr_res_type)); 3656c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 365703e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 365803e98c9eSNicholas Bellinger ret = -EINVAL; 3659c66ac9dbSNicholas Bellinger goto out; 3660c66ac9dbSNicholas Bellinger } 3661c66ac9dbSNicholas Bellinger pr_res_nacl = pr_res_holder->pr_reg_nacl; 3662c66ac9dbSNicholas Bellinger /* 3663c66ac9dbSNicholas Bellinger * b) Ignore the contents of the (received) SCOPE and TYPE fields; 3664c66ac9dbSNicholas Bellinger */ 3665c66ac9dbSNicholas Bellinger type = pr_res_holder->pr_res_type; 3666c66ac9dbSNicholas Bellinger scope = pr_res_holder->pr_res_type; 3667c66ac9dbSNicholas Bellinger /* 3668c66ac9dbSNicholas Bellinger * c) Associate the reservation key specified in the SERVICE ACTION 3669c66ac9dbSNicholas Bellinger * RESERVATION KEY field with the I_T nexus specified as the 3670c66ac9dbSNicholas Bellinger * destination of the register and move, where: 3671c66ac9dbSNicholas Bellinger * A) The I_T nexus is specified by the TransportID and the 3672c66ac9dbSNicholas Bellinger * RELATIVE TARGET PORT IDENTIFIER field (see 6.14.4); and 3673c66ac9dbSNicholas Bellinger * B) Regardless of the TransportID format used, the association for 3674c66ac9dbSNicholas Bellinger * the initiator port is based on either the initiator port name 3675c66ac9dbSNicholas Bellinger * (see 3.1.71) on SCSI transport protocols where port names are 3676c66ac9dbSNicholas Bellinger * required or the initiator port identifier (see 3.1.70) on SCSI 3677c66ac9dbSNicholas Bellinger * transport protocols where port names are not required; 3678c66ac9dbSNicholas Bellinger * d) Register the reservation key specified in the SERVICE ACTION 3679c66ac9dbSNicholas Bellinger * RESERVATION KEY field; 3680c66ac9dbSNicholas Bellinger * e) Retain the reservation key specified in the SERVICE ACTION 3681c66ac9dbSNicholas Bellinger * RESERVATION KEY field and associated information; 3682c66ac9dbSNicholas Bellinger * 3683c66ac9dbSNicholas Bellinger * Also, It is not an error for a REGISTER AND MOVE service action to 3684c66ac9dbSNicholas Bellinger * register an I_T nexus that is already registered with the same 3685c66ac9dbSNicholas Bellinger * reservation key or a different reservation key. 3686c66ac9dbSNicholas Bellinger */ 3687c66ac9dbSNicholas Bellinger dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl, 3688c66ac9dbSNicholas Bellinger iport_ptr); 36896708bb27SAndy Grover if (!dest_pr_reg) { 36905951146dSAndy Grover ret = core_scsi3_alloc_registration(cmd->se_dev, 3691c66ac9dbSNicholas Bellinger dest_node_acl, dest_se_deve, iport_ptr, 3692c66ac9dbSNicholas Bellinger sa_res_key, 0, aptpl, 2, 1); 3693c66ac9dbSNicholas Bellinger if (ret != 0) { 3694c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 369503e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 369603e98c9eSNicholas Bellinger ret = -EINVAL; 3697c66ac9dbSNicholas Bellinger goto out; 3698c66ac9dbSNicholas Bellinger } 3699c66ac9dbSNicholas Bellinger dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl, 3700c66ac9dbSNicholas Bellinger iport_ptr); 3701c66ac9dbSNicholas Bellinger new_reg = 1; 3702c66ac9dbSNicholas Bellinger } 3703c66ac9dbSNicholas Bellinger /* 3704c66ac9dbSNicholas Bellinger * f) Release the persistent reservation for the persistent reservation 3705c66ac9dbSNicholas Bellinger * holder (i.e., the I_T nexus on which the 3706c66ac9dbSNicholas Bellinger */ 3707c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, pr_res_nacl, 3708c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder, 0); 3709c66ac9dbSNicholas Bellinger /* 3710c66ac9dbSNicholas Bellinger * g) Move the persistent reservation to the specified I_T nexus using 3711c66ac9dbSNicholas Bellinger * the same scope and type as the persistent reservation released in 3712c66ac9dbSNicholas Bellinger * item f); and 3713c66ac9dbSNicholas Bellinger */ 3714c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = dest_pr_reg; 3715c66ac9dbSNicholas Bellinger dest_pr_reg->pr_res_holder = 1; 3716c66ac9dbSNicholas Bellinger dest_pr_reg->pr_res_type = type; 3717c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope = scope; 3718c66ac9dbSNicholas Bellinger prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], 3719c66ac9dbSNicholas Bellinger PR_REG_ISID_ID_LEN); 3720c66ac9dbSNicholas Bellinger /* 3721c66ac9dbSNicholas Bellinger * Increment PRGeneration for existing registrations.. 3722c66ac9dbSNicholas Bellinger */ 37236708bb27SAndy Grover if (!new_reg) 3724c66ac9dbSNicholas Bellinger dest_pr_reg->pr_res_generation = pr_tmpl->pr_generation++; 3725c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3726c66ac9dbSNicholas Bellinger 37276708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: REGISTER_AND_MOVE" 3728c66ac9dbSNicholas Bellinger " created new reservation holder TYPE: %s on object RTPI:" 3729c66ac9dbSNicholas Bellinger " %hu PRGeneration: 0x%08x\n", dest_tf_ops->get_fabric_name(), 3730c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(type), rtpi, 3731c66ac9dbSNicholas Bellinger dest_pr_reg->pr_res_generation); 37326708bb27SAndy Grover pr_debug("SPC-3 PR Successfully moved reservation from" 3733c66ac9dbSNicholas Bellinger " %s Fabric Node: %s%s -> %s Fabric Node: %s %s\n", 3734c66ac9dbSNicholas Bellinger tf_ops->get_fabric_name(), pr_reg_nacl->initiatorname, 3735c66ac9dbSNicholas Bellinger (prf_isid) ? &i_buf[0] : "", dest_tf_ops->get_fabric_name(), 3736c66ac9dbSNicholas Bellinger dest_node_acl->initiatorname, (iport_ptr != NULL) ? 3737c66ac9dbSNicholas Bellinger iport_ptr : ""); 3738c66ac9dbSNicholas Bellinger /* 3739c66ac9dbSNicholas Bellinger * It is now safe to release configfs group dependencies for destination 3740c66ac9dbSNicholas Bellinger * of Transport ID Initiator Device/Port Identifier 3741c66ac9dbSNicholas Bellinger */ 3742c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 3743c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 3744c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_se_tpg); 3745c66ac9dbSNicholas Bellinger /* 3746c66ac9dbSNicholas Bellinger * h) If the UNREG bit is set to one, unregister (see 5.7.11.3) the I_T 3747c66ac9dbSNicholas Bellinger * nexus on which PERSISTENT RESERVE OUT command was received. 3748c66ac9dbSNicholas Bellinger */ 3749c66ac9dbSNicholas Bellinger if (unreg) { 3750c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 3751c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, NULL, 1); 3752c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 3753c66ac9dbSNicholas Bellinger } else 3754c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 3755c66ac9dbSNicholas Bellinger 3756c66ac9dbSNicholas Bellinger /* 3757c66ac9dbSNicholas Bellinger * Clear the APTPL metadata if APTPL has been disabled, otherwise 3758c66ac9dbSNicholas Bellinger * write out the updated metadata to struct file for this SCSI device. 3759c66ac9dbSNicholas Bellinger */ 37606708bb27SAndy Grover if (!aptpl) { 3761c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_active = 0; 37625951146dSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, NULL, 0); 37636708bb27SAndy Grover pr_debug("SPC-3 PR: Set APTPL Bit Deactivated for" 3764c66ac9dbSNicholas Bellinger " REGISTER_AND_MOVE\n"); 3765c66ac9dbSNicholas Bellinger } else { 3766c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_active = 1; 37675951146dSAndy Grover ret = core_scsi3_update_and_write_aptpl(cmd->se_dev, 3768c66ac9dbSNicholas Bellinger &dest_pr_reg->pr_aptpl_buf[0], 3769c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_buf_len); 37706708bb27SAndy Grover if (!ret) 37716708bb27SAndy Grover pr_debug("SPC-3 PR: Set APTPL Bit Activated for" 3772c66ac9dbSNicholas Bellinger " REGISTER_AND_MOVE\n"); 3773c66ac9dbSNicholas Bellinger } 3774c66ac9dbSNicholas Bellinger 37754949314cSAndy Grover transport_kunmap_data_sg(cmd); 377605d1c7c0SAndy Grover 3777c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(dest_pr_reg); 3778c66ac9dbSNicholas Bellinger return 0; 3779c66ac9dbSNicholas Bellinger out: 378005d1c7c0SAndy Grover if (buf) 37814949314cSAndy Grover transport_kunmap_data_sg(cmd); 3782c66ac9dbSNicholas Bellinger if (dest_se_deve) 3783c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 3784c66ac9dbSNicholas Bellinger if (dest_node_acl) 3785c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 3786c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_se_tpg); 3787c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 3788c66ac9dbSNicholas Bellinger return ret; 3789c66ac9dbSNicholas Bellinger } 3790c66ac9dbSNicholas Bellinger 3791c66ac9dbSNicholas Bellinger static unsigned long long core_scsi3_extract_reservation_key(unsigned char *cdb) 3792c66ac9dbSNicholas Bellinger { 3793c66ac9dbSNicholas Bellinger unsigned int __v1, __v2; 3794c66ac9dbSNicholas Bellinger 3795c66ac9dbSNicholas Bellinger __v1 = (cdb[0] << 24) | (cdb[1] << 16) | (cdb[2] << 8) | cdb[3]; 3796c66ac9dbSNicholas Bellinger __v2 = (cdb[4] << 24) | (cdb[5] << 16) | (cdb[6] << 8) | cdb[7]; 3797c66ac9dbSNicholas Bellinger 3798c66ac9dbSNicholas Bellinger return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; 3799c66ac9dbSNicholas Bellinger } 3800c66ac9dbSNicholas Bellinger 3801c66ac9dbSNicholas Bellinger /* 3802c66ac9dbSNicholas Bellinger * See spc4r17 section 6.14 Table 170 3803c66ac9dbSNicholas Bellinger */ 38046bb35e00SChristoph Hellwig int target_scsi3_emulate_pr_out(struct se_cmd *cmd) 3805c66ac9dbSNicholas Bellinger { 3806617c0e06SChristoph Hellwig unsigned char *cdb = &cmd->t_task_cdb[0]; 380705d1c7c0SAndy Grover unsigned char *buf; 3808c66ac9dbSNicholas Bellinger u64 res_key, sa_res_key; 3809c66ac9dbSNicholas Bellinger int sa, scope, type, aptpl; 3810c66ac9dbSNicholas Bellinger int spec_i_pt = 0, all_tg_pt = 0, unreg = 0; 3811d29a5b6aSChristoph Hellwig int ret; 3812617c0e06SChristoph Hellwig 3813617c0e06SChristoph Hellwig /* 3814617c0e06SChristoph Hellwig * Following spc2r20 5.5.1 Reservations overview: 3815617c0e06SChristoph Hellwig * 3816617c0e06SChristoph Hellwig * If a logical unit has been reserved by any RESERVE command and is 3817617c0e06SChristoph Hellwig * still reserved by any initiator, all PERSISTENT RESERVE IN and all 3818617c0e06SChristoph Hellwig * PERSISTENT RESERVE OUT commands shall conflict regardless of 3819617c0e06SChristoph Hellwig * initiator or service action and shall terminate with a RESERVATION 3820617c0e06SChristoph Hellwig * CONFLICT status. 3821617c0e06SChristoph Hellwig */ 38220fd97ccfSChristoph Hellwig if (cmd->se_dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) { 3823617c0e06SChristoph Hellwig pr_err("Received PERSISTENT_RESERVE CDB while legacy" 3824617c0e06SChristoph Hellwig " SPC-2 reservation is held, returning" 3825617c0e06SChristoph Hellwig " RESERVATION_CONFLICT\n"); 382603e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 3827d35212f3SRoland Dreier ret = -EINVAL; 3828d29a5b6aSChristoph Hellwig goto out; 3829617c0e06SChristoph Hellwig } 3830617c0e06SChristoph Hellwig 3831c66ac9dbSNicholas Bellinger /* 3832c66ac9dbSNicholas Bellinger * FIXME: A NULL struct se_session pointer means an this is not coming from 3833c66ac9dbSNicholas Bellinger * a $FABRIC_MOD's nexus, but from internal passthrough ops. 3834c66ac9dbSNicholas Bellinger */ 383503e98c9eSNicholas Bellinger if (!cmd->se_sess) { 383603e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3837d35212f3SRoland Dreier ret = -EINVAL; 3838d35212f3SRoland Dreier goto out; 383903e98c9eSNicholas Bellinger } 3840c66ac9dbSNicholas Bellinger 3841c66ac9dbSNicholas Bellinger if (cmd->data_length < 24) { 38426708bb27SAndy Grover pr_warn("SPC-PR: Received PR OUT parameter list" 3843c66ac9dbSNicholas Bellinger " length too small: %u\n", cmd->data_length); 384403e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 384503e98c9eSNicholas Bellinger ret = -EINVAL; 3846d29a5b6aSChristoph Hellwig goto out; 3847c66ac9dbSNicholas Bellinger } 3848c66ac9dbSNicholas Bellinger /* 3849c66ac9dbSNicholas Bellinger * From the PERSISTENT_RESERVE_OUT command descriptor block (CDB) 3850c66ac9dbSNicholas Bellinger */ 3851c66ac9dbSNicholas Bellinger sa = (cdb[1] & 0x1f); 3852c66ac9dbSNicholas Bellinger scope = (cdb[2] & 0xf0); 3853c66ac9dbSNicholas Bellinger type = (cdb[2] & 0x0f); 385405d1c7c0SAndy Grover 38554949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3856c66ac9dbSNicholas Bellinger /* 3857c66ac9dbSNicholas Bellinger * From PERSISTENT_RESERVE_OUT parameter list (payload) 3858c66ac9dbSNicholas Bellinger */ 3859c66ac9dbSNicholas Bellinger res_key = core_scsi3_extract_reservation_key(&buf[0]); 3860c66ac9dbSNicholas Bellinger sa_res_key = core_scsi3_extract_reservation_key(&buf[8]); 3861c66ac9dbSNicholas Bellinger /* 3862c66ac9dbSNicholas Bellinger * REGISTER_AND_MOVE uses a different SA parameter list containing 3863c66ac9dbSNicholas Bellinger * SCSI TransportIDs. 3864c66ac9dbSNicholas Bellinger */ 3865c66ac9dbSNicholas Bellinger if (sa != PRO_REGISTER_AND_MOVE) { 3866c66ac9dbSNicholas Bellinger spec_i_pt = (buf[20] & 0x08); 3867c66ac9dbSNicholas Bellinger all_tg_pt = (buf[20] & 0x04); 3868c66ac9dbSNicholas Bellinger aptpl = (buf[20] & 0x01); 3869c66ac9dbSNicholas Bellinger } else { 3870c66ac9dbSNicholas Bellinger aptpl = (buf[17] & 0x01); 3871c66ac9dbSNicholas Bellinger unreg = (buf[17] & 0x02); 3872c66ac9dbSNicholas Bellinger } 38734949314cSAndy Grover transport_kunmap_data_sg(cmd); 387405d1c7c0SAndy Grover buf = NULL; 387505d1c7c0SAndy Grover 3876c66ac9dbSNicholas Bellinger /* 3877c66ac9dbSNicholas Bellinger * SPEC_I_PT=1 is only valid for Service action: REGISTER 3878c66ac9dbSNicholas Bellinger */ 3879d29a5b6aSChristoph Hellwig if (spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER)) { 388003e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 388103e98c9eSNicholas Bellinger ret = -EINVAL; 3882d29a5b6aSChristoph Hellwig goto out; 3883d29a5b6aSChristoph Hellwig } 3884d29a5b6aSChristoph Hellwig 3885c66ac9dbSNicholas Bellinger /* 3886c66ac9dbSNicholas Bellinger * From spc4r17 section 6.14: 3887c66ac9dbSNicholas Bellinger * 3888c66ac9dbSNicholas Bellinger * If the SPEC_I_PT bit is set to zero, the service action is not 3889c66ac9dbSNicholas Bellinger * REGISTER AND MOVE, and the parameter list length is not 24, then 3890c66ac9dbSNicholas Bellinger * the command shall be terminated with CHECK CONDITION status, with 3891c66ac9dbSNicholas Bellinger * the sense key set to ILLEGAL REQUEST, and the additional sense 3892c66ac9dbSNicholas Bellinger * code set to PARAMETER LIST LENGTH ERROR. 3893c66ac9dbSNicholas Bellinger */ 38946708bb27SAndy Grover if (!spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER_AND_MOVE) && 3895c66ac9dbSNicholas Bellinger (cmd->data_length != 24)) { 38966708bb27SAndy Grover pr_warn("SPC-PR: Received PR OUT illegal parameter" 3897c66ac9dbSNicholas Bellinger " list length: %u\n", cmd->data_length); 389803e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 389903e98c9eSNicholas Bellinger ret = -EINVAL; 3900d29a5b6aSChristoph Hellwig goto out; 3901c66ac9dbSNicholas Bellinger } 3902c66ac9dbSNicholas Bellinger /* 3903c66ac9dbSNicholas Bellinger * (core_scsi3_emulate_pro_* function parameters 3904c66ac9dbSNicholas Bellinger * are defined by spc4r17 Table 174: 3905c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_OUT service actions and valid parameters. 3906c66ac9dbSNicholas Bellinger */ 3907c66ac9dbSNicholas Bellinger switch (sa) { 3908c66ac9dbSNicholas Bellinger case PRO_REGISTER: 3909d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_register(cmd, 3910c66ac9dbSNicholas Bellinger res_key, sa_res_key, aptpl, all_tg_pt, spec_i_pt, 0); 3911d29a5b6aSChristoph Hellwig break; 3912c66ac9dbSNicholas Bellinger case PRO_RESERVE: 3913d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_reserve(cmd, type, scope, res_key); 3914d29a5b6aSChristoph Hellwig break; 3915c66ac9dbSNicholas Bellinger case PRO_RELEASE: 3916d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_release(cmd, type, scope, res_key); 3917d29a5b6aSChristoph Hellwig break; 3918c66ac9dbSNicholas Bellinger case PRO_CLEAR: 3919d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_clear(cmd, res_key); 3920d29a5b6aSChristoph Hellwig break; 3921c66ac9dbSNicholas Bellinger case PRO_PREEMPT: 3922d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_preempt(cmd, type, scope, 3923c66ac9dbSNicholas Bellinger res_key, sa_res_key, 0); 3924d29a5b6aSChristoph Hellwig break; 3925c66ac9dbSNicholas Bellinger case PRO_PREEMPT_AND_ABORT: 3926d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_preempt(cmd, type, scope, 3927c66ac9dbSNicholas Bellinger res_key, sa_res_key, 1); 3928d29a5b6aSChristoph Hellwig break; 3929c66ac9dbSNicholas Bellinger case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: 3930d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_register(cmd, 3931c66ac9dbSNicholas Bellinger 0, sa_res_key, aptpl, all_tg_pt, spec_i_pt, 1); 3932d29a5b6aSChristoph Hellwig break; 3933c66ac9dbSNicholas Bellinger case PRO_REGISTER_AND_MOVE: 3934d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_register_and_move(cmd, res_key, 3935c66ac9dbSNicholas Bellinger sa_res_key, aptpl, unreg); 3936d29a5b6aSChristoph Hellwig break; 3937c66ac9dbSNicholas Bellinger default: 39386708bb27SAndy Grover pr_err("Unknown PERSISTENT_RESERVE_OUT service" 3939c66ac9dbSNicholas Bellinger " action: 0x%02x\n", cdb[1] & 0x1f); 394003e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; 394103e98c9eSNicholas Bellinger ret = -EINVAL; 3942d29a5b6aSChristoph Hellwig break; 3943c66ac9dbSNicholas Bellinger } 3944c66ac9dbSNicholas Bellinger 3945d29a5b6aSChristoph Hellwig out: 39466bb35e00SChristoph Hellwig if (!ret) 39476bb35e00SChristoph Hellwig target_complete_cmd(cmd, GOOD); 3948d29a5b6aSChristoph Hellwig return ret; 3949c66ac9dbSNicholas Bellinger } 3950c66ac9dbSNicholas Bellinger 3951c66ac9dbSNicholas Bellinger /* 3952c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_IN Service Action READ_KEYS 3953c66ac9dbSNicholas Bellinger * 3954c66ac9dbSNicholas Bellinger * See spc4r17 section 5.7.6.2 and section 6.13.2, Table 160 3955c66ac9dbSNicholas Bellinger */ 3956c66ac9dbSNicholas Bellinger static int core_scsi3_pri_read_keys(struct se_cmd *cmd) 3957c66ac9dbSNicholas Bellinger { 39580fd97ccfSChristoph Hellwig struct se_device *dev = cmd->se_dev; 3959c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 396005d1c7c0SAndy Grover unsigned char *buf; 3961c66ac9dbSNicholas Bellinger u32 add_len = 0, off = 8; 3962c66ac9dbSNicholas Bellinger 3963c66ac9dbSNicholas Bellinger if (cmd->data_length < 8) { 39646708bb27SAndy Grover pr_err("PRIN SA READ_KEYS SCSI Data Length: %u" 3965c66ac9dbSNicholas Bellinger " too small\n", cmd->data_length); 396603e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; 396703e98c9eSNicholas Bellinger return -EINVAL; 3968c66ac9dbSNicholas Bellinger } 3969c66ac9dbSNicholas Bellinger 39704949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 39710fd97ccfSChristoph Hellwig buf[0] = ((dev->t10_pr.pr_generation >> 24) & 0xff); 39720fd97ccfSChristoph Hellwig buf[1] = ((dev->t10_pr.pr_generation >> 16) & 0xff); 39730fd97ccfSChristoph Hellwig buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff); 39740fd97ccfSChristoph Hellwig buf[3] = (dev->t10_pr.pr_generation & 0xff); 3975c66ac9dbSNicholas Bellinger 39760fd97ccfSChristoph Hellwig spin_lock(&dev->t10_pr.registration_lock); 39770fd97ccfSChristoph Hellwig list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 3978c66ac9dbSNicholas Bellinger pr_reg_list) { 3979c66ac9dbSNicholas Bellinger /* 3980c66ac9dbSNicholas Bellinger * Check for overflow of 8byte PRI READ_KEYS payload and 3981c66ac9dbSNicholas Bellinger * next reservation key list descriptor. 3982c66ac9dbSNicholas Bellinger */ 3983c66ac9dbSNicholas Bellinger if ((add_len + 8) > (cmd->data_length - 8)) 3984c66ac9dbSNicholas Bellinger break; 3985c66ac9dbSNicholas Bellinger 3986c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff); 3987c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff); 3988c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff); 3989c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff); 3990c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff); 3991c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff); 3992c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff); 3993c66ac9dbSNicholas Bellinger buf[off++] = (pr_reg->pr_res_key & 0xff); 3994c66ac9dbSNicholas Bellinger 3995c66ac9dbSNicholas Bellinger add_len += 8; 3996c66ac9dbSNicholas Bellinger } 39970fd97ccfSChristoph Hellwig spin_unlock(&dev->t10_pr.registration_lock); 3998c66ac9dbSNicholas Bellinger 3999c66ac9dbSNicholas Bellinger buf[4] = ((add_len >> 24) & 0xff); 4000c66ac9dbSNicholas Bellinger buf[5] = ((add_len >> 16) & 0xff); 4001c66ac9dbSNicholas Bellinger buf[6] = ((add_len >> 8) & 0xff); 4002c66ac9dbSNicholas Bellinger buf[7] = (add_len & 0xff); 4003c66ac9dbSNicholas Bellinger 40044949314cSAndy Grover transport_kunmap_data_sg(cmd); 400505d1c7c0SAndy Grover 4006c66ac9dbSNicholas Bellinger return 0; 4007c66ac9dbSNicholas Bellinger } 4008c66ac9dbSNicholas Bellinger 4009c66ac9dbSNicholas Bellinger /* 4010c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_IN Service Action READ_RESERVATION 4011c66ac9dbSNicholas Bellinger * 4012c66ac9dbSNicholas Bellinger * See spc4r17 section 5.7.6.3 and section 6.13.3.2 Table 161 and 162 4013c66ac9dbSNicholas Bellinger */ 4014c66ac9dbSNicholas Bellinger static int core_scsi3_pri_read_reservation(struct se_cmd *cmd) 4015c66ac9dbSNicholas Bellinger { 40160fd97ccfSChristoph Hellwig struct se_device *dev = cmd->se_dev; 4017c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 401805d1c7c0SAndy Grover unsigned char *buf; 4019c66ac9dbSNicholas Bellinger u64 pr_res_key; 4020c66ac9dbSNicholas Bellinger u32 add_len = 16; /* Hardcoded to 16 when a reservation is held. */ 4021c66ac9dbSNicholas Bellinger 4022c66ac9dbSNicholas Bellinger if (cmd->data_length < 8) { 40236708bb27SAndy Grover pr_err("PRIN SA READ_RESERVATIONS SCSI Data Length: %u" 4024c66ac9dbSNicholas Bellinger " too small\n", cmd->data_length); 402503e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; 402603e98c9eSNicholas Bellinger return -EINVAL; 4027c66ac9dbSNicholas Bellinger } 4028c66ac9dbSNicholas Bellinger 40294949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 40300fd97ccfSChristoph Hellwig buf[0] = ((dev->t10_pr.pr_generation >> 24) & 0xff); 40310fd97ccfSChristoph Hellwig buf[1] = ((dev->t10_pr.pr_generation >> 16) & 0xff); 40320fd97ccfSChristoph Hellwig buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff); 40330fd97ccfSChristoph Hellwig buf[3] = (dev->t10_pr.pr_generation & 0xff); 4034c66ac9dbSNicholas Bellinger 40350fd97ccfSChristoph Hellwig spin_lock(&dev->dev_reservation_lock); 40360fd97ccfSChristoph Hellwig pr_reg = dev->dev_pr_res_holder; 4037ee1b1b9cSAndy Grover if (pr_reg) { 4038c66ac9dbSNicholas Bellinger /* 4039c66ac9dbSNicholas Bellinger * Set the hardcoded Additional Length 4040c66ac9dbSNicholas Bellinger */ 4041c66ac9dbSNicholas Bellinger buf[4] = ((add_len >> 24) & 0xff); 4042c66ac9dbSNicholas Bellinger buf[5] = ((add_len >> 16) & 0xff); 4043c66ac9dbSNicholas Bellinger buf[6] = ((add_len >> 8) & 0xff); 4044c66ac9dbSNicholas Bellinger buf[7] = (add_len & 0xff); 4045c66ac9dbSNicholas Bellinger 404605d1c7c0SAndy Grover if (cmd->data_length < 22) 404705d1c7c0SAndy Grover goto err; 404805d1c7c0SAndy Grover 4049c66ac9dbSNicholas Bellinger /* 4050c66ac9dbSNicholas Bellinger * Set the Reservation key. 4051c66ac9dbSNicholas Bellinger * 4052c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.10: 4053c66ac9dbSNicholas Bellinger * A persistent reservation holder has its reservation key 4054c66ac9dbSNicholas Bellinger * returned in the parameter data from a PERSISTENT 4055c66ac9dbSNicholas Bellinger * RESERVE IN command with READ RESERVATION service action as 4056c66ac9dbSNicholas Bellinger * follows: 4057c66ac9dbSNicholas Bellinger * a) For a persistent reservation of the type Write Exclusive 4058c66ac9dbSNicholas Bellinger * - All Registrants or Exclusive Access All Regitrants, 4059c66ac9dbSNicholas Bellinger * the reservation key shall be set to zero; or 4060c66ac9dbSNicholas Bellinger * b) For all other persistent reservation types, the 4061c66ac9dbSNicholas Bellinger * reservation key shall be set to the registered 4062c66ac9dbSNicholas Bellinger * reservation key for the I_T nexus that holds the 4063c66ac9dbSNicholas Bellinger * persistent reservation. 4064c66ac9dbSNicholas Bellinger */ 4065c66ac9dbSNicholas Bellinger if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 4066c66ac9dbSNicholas Bellinger (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) 4067c66ac9dbSNicholas Bellinger pr_res_key = 0; 4068c66ac9dbSNicholas Bellinger else 4069c66ac9dbSNicholas Bellinger pr_res_key = pr_reg->pr_res_key; 4070c66ac9dbSNicholas Bellinger 4071c66ac9dbSNicholas Bellinger buf[8] = ((pr_res_key >> 56) & 0xff); 4072c66ac9dbSNicholas Bellinger buf[9] = ((pr_res_key >> 48) & 0xff); 4073c66ac9dbSNicholas Bellinger buf[10] = ((pr_res_key >> 40) & 0xff); 4074c66ac9dbSNicholas Bellinger buf[11] = ((pr_res_key >> 32) & 0xff); 4075c66ac9dbSNicholas Bellinger buf[12] = ((pr_res_key >> 24) & 0xff); 4076c66ac9dbSNicholas Bellinger buf[13] = ((pr_res_key >> 16) & 0xff); 4077c66ac9dbSNicholas Bellinger buf[14] = ((pr_res_key >> 8) & 0xff); 4078c66ac9dbSNicholas Bellinger buf[15] = (pr_res_key & 0xff); 4079c66ac9dbSNicholas Bellinger /* 4080c66ac9dbSNicholas Bellinger * Set the SCOPE and TYPE 4081c66ac9dbSNicholas Bellinger */ 4082c66ac9dbSNicholas Bellinger buf[21] = (pr_reg->pr_res_scope & 0xf0) | 4083c66ac9dbSNicholas Bellinger (pr_reg->pr_res_type & 0x0f); 4084c66ac9dbSNicholas Bellinger } 408505d1c7c0SAndy Grover 408605d1c7c0SAndy Grover err: 40870fd97ccfSChristoph Hellwig spin_unlock(&dev->dev_reservation_lock); 40884949314cSAndy Grover transport_kunmap_data_sg(cmd); 4089c66ac9dbSNicholas Bellinger 4090c66ac9dbSNicholas Bellinger return 0; 4091c66ac9dbSNicholas Bellinger } 4092c66ac9dbSNicholas Bellinger 4093c66ac9dbSNicholas Bellinger /* 4094c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_IN Service Action REPORT_CAPABILITIES 4095c66ac9dbSNicholas Bellinger * 4096c66ac9dbSNicholas Bellinger * See spc4r17 section 6.13.4 Table 165 4097c66ac9dbSNicholas Bellinger */ 4098c66ac9dbSNicholas Bellinger static int core_scsi3_pri_report_capabilities(struct se_cmd *cmd) 4099c66ac9dbSNicholas Bellinger { 41005951146dSAndy Grover struct se_device *dev = cmd->se_dev; 41010fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 410205d1c7c0SAndy Grover unsigned char *buf; 4103c66ac9dbSNicholas Bellinger u16 add_len = 8; /* Hardcoded to 8. */ 4104c66ac9dbSNicholas Bellinger 4105c66ac9dbSNicholas Bellinger if (cmd->data_length < 6) { 41066708bb27SAndy Grover pr_err("PRIN SA REPORT_CAPABILITIES SCSI Data Length:" 4107c66ac9dbSNicholas Bellinger " %u too small\n", cmd->data_length); 410803e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; 410903e98c9eSNicholas Bellinger return -EINVAL; 4110c66ac9dbSNicholas Bellinger } 4111c66ac9dbSNicholas Bellinger 41124949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 411305d1c7c0SAndy Grover 4114c66ac9dbSNicholas Bellinger buf[0] = ((add_len << 8) & 0xff); 4115c66ac9dbSNicholas Bellinger buf[1] = (add_len & 0xff); 4116c66ac9dbSNicholas Bellinger buf[2] |= 0x10; /* CRH: Compatible Reservation Hanlding bit. */ 4117c66ac9dbSNicholas Bellinger buf[2] |= 0x08; /* SIP_C: Specify Initiator Ports Capable bit */ 4118c66ac9dbSNicholas Bellinger buf[2] |= 0x04; /* ATP_C: All Target Ports Capable bit */ 4119c66ac9dbSNicholas Bellinger buf[2] |= 0x01; /* PTPL_C: Persistence across Target Power Loss bit */ 4120c66ac9dbSNicholas Bellinger /* 4121c66ac9dbSNicholas Bellinger * We are filling in the PERSISTENT RESERVATION TYPE MASK below, so 4122c66ac9dbSNicholas Bellinger * set the TMV: Task Mask Valid bit. 4123c66ac9dbSNicholas Bellinger */ 4124c66ac9dbSNicholas Bellinger buf[3] |= 0x80; 4125c66ac9dbSNicholas Bellinger /* 4126c66ac9dbSNicholas Bellinger * Change ALLOW COMMANDs to 0x20 or 0x40 later from Table 166 4127c66ac9dbSNicholas Bellinger */ 4128c66ac9dbSNicholas Bellinger buf[3] |= 0x10; /* ALLOW COMMANDs field 001b */ 4129c66ac9dbSNicholas Bellinger /* 4130c66ac9dbSNicholas Bellinger * PTPL_A: Persistence across Target Power Loss Active bit 4131c66ac9dbSNicholas Bellinger */ 4132c66ac9dbSNicholas Bellinger if (pr_tmpl->pr_aptpl_active) 4133c66ac9dbSNicholas Bellinger buf[3] |= 0x01; 4134c66ac9dbSNicholas Bellinger /* 4135c66ac9dbSNicholas Bellinger * Setup the PERSISTENT RESERVATION TYPE MASK from Table 167 4136c66ac9dbSNicholas Bellinger */ 4137c66ac9dbSNicholas Bellinger buf[4] |= 0x80; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ 4138c66ac9dbSNicholas Bellinger buf[4] |= 0x40; /* PR_TYPE_EXCLUSIVE_ACCESS_REGONLY */ 4139c66ac9dbSNicholas Bellinger buf[4] |= 0x20; /* PR_TYPE_WRITE_EXCLUSIVE_REGONLY */ 4140c66ac9dbSNicholas Bellinger buf[4] |= 0x08; /* PR_TYPE_EXCLUSIVE_ACCESS */ 4141c66ac9dbSNicholas Bellinger buf[4] |= 0x02; /* PR_TYPE_WRITE_EXCLUSIVE */ 4142c66ac9dbSNicholas Bellinger buf[5] |= 0x01; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ 4143c66ac9dbSNicholas Bellinger 41444949314cSAndy Grover transport_kunmap_data_sg(cmd); 414505d1c7c0SAndy Grover 4146c66ac9dbSNicholas Bellinger return 0; 4147c66ac9dbSNicholas Bellinger } 4148c66ac9dbSNicholas Bellinger 4149c66ac9dbSNicholas Bellinger /* 4150c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_IN Service Action READ_FULL_STATUS 4151c66ac9dbSNicholas Bellinger * 4152c66ac9dbSNicholas Bellinger * See spc4r17 section 6.13.5 Table 168 and 169 4153c66ac9dbSNicholas Bellinger */ 4154c66ac9dbSNicholas Bellinger static int core_scsi3_pri_read_full_status(struct se_cmd *cmd) 4155c66ac9dbSNicholas Bellinger { 41560fd97ccfSChristoph Hellwig struct se_device *dev = cmd->se_dev; 4157c66ac9dbSNicholas Bellinger struct se_node_acl *se_nacl; 4158c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg; 4159c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp; 41600fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 416105d1c7c0SAndy Grover unsigned char *buf; 4162c66ac9dbSNicholas Bellinger u32 add_desc_len = 0, add_len = 0, desc_len, exp_desc_len; 4163c66ac9dbSNicholas Bellinger u32 off = 8; /* off into first Full Status descriptor */ 4164c66ac9dbSNicholas Bellinger int format_code = 0; 4165c66ac9dbSNicholas Bellinger 4166c66ac9dbSNicholas Bellinger if (cmd->data_length < 8) { 41676708bb27SAndy Grover pr_err("PRIN SA READ_FULL_STATUS SCSI Data Length: %u" 4168c66ac9dbSNicholas Bellinger " too small\n", cmd->data_length); 416903e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; 417003e98c9eSNicholas Bellinger return -EINVAL; 4171c66ac9dbSNicholas Bellinger } 4172c66ac9dbSNicholas Bellinger 41734949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 417405d1c7c0SAndy Grover 41750fd97ccfSChristoph Hellwig buf[0] = ((dev->t10_pr.pr_generation >> 24) & 0xff); 41760fd97ccfSChristoph Hellwig buf[1] = ((dev->t10_pr.pr_generation >> 16) & 0xff); 41770fd97ccfSChristoph Hellwig buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff); 41780fd97ccfSChristoph Hellwig buf[3] = (dev->t10_pr.pr_generation & 0xff); 4179c66ac9dbSNicholas Bellinger 4180c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 4181c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 4182c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 4183c66ac9dbSNicholas Bellinger 4184c66ac9dbSNicholas Bellinger se_nacl = pr_reg->pr_reg_nacl; 4185c66ac9dbSNicholas Bellinger se_tpg = pr_reg->pr_reg_nacl->se_tpg; 4186c66ac9dbSNicholas Bellinger add_desc_len = 0; 4187c66ac9dbSNicholas Bellinger 4188c66ac9dbSNicholas Bellinger atomic_inc(&pr_reg->pr_res_holders); 4189c66ac9dbSNicholas Bellinger smp_mb__after_atomic_inc(); 4190c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 4191c66ac9dbSNicholas Bellinger /* 4192c66ac9dbSNicholas Bellinger * Determine expected length of $FABRIC_MOD specific 4193c66ac9dbSNicholas Bellinger * TransportID full status descriptor.. 4194c66ac9dbSNicholas Bellinger */ 4195e3d6f909SAndy Grover exp_desc_len = se_tpg->se_tpg_tfo->tpg_get_pr_transport_id_len( 4196c66ac9dbSNicholas Bellinger se_tpg, se_nacl, pr_reg, &format_code); 4197c66ac9dbSNicholas Bellinger 4198c66ac9dbSNicholas Bellinger if ((exp_desc_len + add_len) > cmd->data_length) { 41996708bb27SAndy Grover pr_warn("SPC-3 PRIN READ_FULL_STATUS ran" 4200c66ac9dbSNicholas Bellinger " out of buffer: %d\n", cmd->data_length); 4201c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 4202c66ac9dbSNicholas Bellinger atomic_dec(&pr_reg->pr_res_holders); 4203c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 4204c66ac9dbSNicholas Bellinger break; 4205c66ac9dbSNicholas Bellinger } 4206c66ac9dbSNicholas Bellinger /* 4207c66ac9dbSNicholas Bellinger * Set RESERVATION KEY 4208c66ac9dbSNicholas Bellinger */ 4209c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff); 4210c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff); 4211c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff); 4212c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff); 4213c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff); 4214c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff); 4215c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff); 4216c66ac9dbSNicholas Bellinger buf[off++] = (pr_reg->pr_res_key & 0xff); 4217c66ac9dbSNicholas Bellinger off += 4; /* Skip Over Reserved area */ 4218c66ac9dbSNicholas Bellinger 4219c66ac9dbSNicholas Bellinger /* 4220c66ac9dbSNicholas Bellinger * Set ALL_TG_PT bit if PROUT SA REGISTER had this set. 4221c66ac9dbSNicholas Bellinger */ 4222c66ac9dbSNicholas Bellinger if (pr_reg->pr_reg_all_tg_pt) 4223c66ac9dbSNicholas Bellinger buf[off] = 0x02; 4224c66ac9dbSNicholas Bellinger /* 4225c66ac9dbSNicholas Bellinger * The struct se_lun pointer will be present for the 4226c66ac9dbSNicholas Bellinger * reservation holder for PR_HOLDER bit. 4227c66ac9dbSNicholas Bellinger * 4228c66ac9dbSNicholas Bellinger * Also, if this registration is the reservation 4229c66ac9dbSNicholas Bellinger * holder, fill in SCOPE and TYPE in the next byte. 4230c66ac9dbSNicholas Bellinger */ 4231c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_holder) { 4232c66ac9dbSNicholas Bellinger buf[off++] |= 0x01; 4233c66ac9dbSNicholas Bellinger buf[off++] = (pr_reg->pr_res_scope & 0xf0) | 4234c66ac9dbSNicholas Bellinger (pr_reg->pr_res_type & 0x0f); 4235c66ac9dbSNicholas Bellinger } else 4236c66ac9dbSNicholas Bellinger off += 2; 4237c66ac9dbSNicholas Bellinger 4238c66ac9dbSNicholas Bellinger off += 4; /* Skip over reserved area */ 4239c66ac9dbSNicholas Bellinger /* 4240c66ac9dbSNicholas Bellinger * From spc4r17 6.3.15: 4241c66ac9dbSNicholas Bellinger * 4242c66ac9dbSNicholas Bellinger * If the ALL_TG_PT bit set to zero, the RELATIVE TARGET PORT 4243c66ac9dbSNicholas Bellinger * IDENTIFIER field contains the relative port identifier (see 4244c66ac9dbSNicholas Bellinger * 3.1.120) of the target port that is part of the I_T nexus 4245c66ac9dbSNicholas Bellinger * described by this full status descriptor. If the ALL_TG_PT 4246c66ac9dbSNicholas Bellinger * bit is set to one, the contents of the RELATIVE TARGET PORT 4247c66ac9dbSNicholas Bellinger * IDENTIFIER field are not defined by this standard. 4248c66ac9dbSNicholas Bellinger */ 42496708bb27SAndy Grover if (!pr_reg->pr_reg_all_tg_pt) { 4250c66ac9dbSNicholas Bellinger struct se_port *port = pr_reg->pr_reg_tg_pt_lun->lun_sep; 4251c66ac9dbSNicholas Bellinger 4252c66ac9dbSNicholas Bellinger buf[off++] = ((port->sep_rtpi >> 8) & 0xff); 4253c66ac9dbSNicholas Bellinger buf[off++] = (port->sep_rtpi & 0xff); 4254c66ac9dbSNicholas Bellinger } else 425535d1efe8SMasanari Iida off += 2; /* Skip over RELATIVE TARGET PORT IDENTIFIER */ 4256c66ac9dbSNicholas Bellinger 4257c66ac9dbSNicholas Bellinger /* 4258c66ac9dbSNicholas Bellinger * Now, have the $FABRIC_MOD fill in the protocol identifier 4259c66ac9dbSNicholas Bellinger */ 4260e3d6f909SAndy Grover desc_len = se_tpg->se_tpg_tfo->tpg_get_pr_transport_id(se_tpg, 4261c66ac9dbSNicholas Bellinger se_nacl, pr_reg, &format_code, &buf[off+4]); 4262c66ac9dbSNicholas Bellinger 4263c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 4264c66ac9dbSNicholas Bellinger atomic_dec(&pr_reg->pr_res_holders); 4265c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 4266c66ac9dbSNicholas Bellinger /* 4267c66ac9dbSNicholas Bellinger * Set the ADDITIONAL DESCRIPTOR LENGTH 4268c66ac9dbSNicholas Bellinger */ 4269c66ac9dbSNicholas Bellinger buf[off++] = ((desc_len >> 24) & 0xff); 4270c66ac9dbSNicholas Bellinger buf[off++] = ((desc_len >> 16) & 0xff); 4271c66ac9dbSNicholas Bellinger buf[off++] = ((desc_len >> 8) & 0xff); 4272c66ac9dbSNicholas Bellinger buf[off++] = (desc_len & 0xff); 4273c66ac9dbSNicholas Bellinger /* 4274c66ac9dbSNicholas Bellinger * Size of full desctipor header minus TransportID 4275c66ac9dbSNicholas Bellinger * containing $FABRIC_MOD specific) initiator device/port 4276c66ac9dbSNicholas Bellinger * WWN information. 4277c66ac9dbSNicholas Bellinger * 4278c66ac9dbSNicholas Bellinger * See spc4r17 Section 6.13.5 Table 169 4279c66ac9dbSNicholas Bellinger */ 4280c66ac9dbSNicholas Bellinger add_desc_len = (24 + desc_len); 4281c66ac9dbSNicholas Bellinger 4282c66ac9dbSNicholas Bellinger off += desc_len; 4283c66ac9dbSNicholas Bellinger add_len += add_desc_len; 4284c66ac9dbSNicholas Bellinger } 4285c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 4286c66ac9dbSNicholas Bellinger /* 4287c66ac9dbSNicholas Bellinger * Set ADDITIONAL_LENGTH 4288c66ac9dbSNicholas Bellinger */ 4289c66ac9dbSNicholas Bellinger buf[4] = ((add_len >> 24) & 0xff); 4290c66ac9dbSNicholas Bellinger buf[5] = ((add_len >> 16) & 0xff); 4291c66ac9dbSNicholas Bellinger buf[6] = ((add_len >> 8) & 0xff); 4292c66ac9dbSNicholas Bellinger buf[7] = (add_len & 0xff); 4293c66ac9dbSNicholas Bellinger 42944949314cSAndy Grover transport_kunmap_data_sg(cmd); 429505d1c7c0SAndy Grover 4296c66ac9dbSNicholas Bellinger return 0; 4297c66ac9dbSNicholas Bellinger } 4298c66ac9dbSNicholas Bellinger 42996bb35e00SChristoph Hellwig int target_scsi3_emulate_pr_in(struct se_cmd *cmd) 4300c66ac9dbSNicholas Bellinger { 4301d29a5b6aSChristoph Hellwig int ret; 4302e76a35d6SChristoph Hellwig 4303617c0e06SChristoph Hellwig /* 4304617c0e06SChristoph Hellwig * Following spc2r20 5.5.1 Reservations overview: 4305617c0e06SChristoph Hellwig * 4306617c0e06SChristoph Hellwig * If a logical unit has been reserved by any RESERVE command and is 4307617c0e06SChristoph Hellwig * still reserved by any initiator, all PERSISTENT RESERVE IN and all 4308617c0e06SChristoph Hellwig * PERSISTENT RESERVE OUT commands shall conflict regardless of 4309617c0e06SChristoph Hellwig * initiator or service action and shall terminate with a RESERVATION 4310617c0e06SChristoph Hellwig * CONFLICT status. 4311617c0e06SChristoph Hellwig */ 43120fd97ccfSChristoph Hellwig if (cmd->se_dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) { 4313617c0e06SChristoph Hellwig pr_err("Received PERSISTENT_RESERVE CDB while legacy" 4314617c0e06SChristoph Hellwig " SPC-2 reservation is held, returning" 4315617c0e06SChristoph Hellwig " RESERVATION_CONFLICT\n"); 431603e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 431703e98c9eSNicholas Bellinger return -EINVAL; 4318617c0e06SChristoph Hellwig } 4319617c0e06SChristoph Hellwig 4320617c0e06SChristoph Hellwig switch (cmd->t_task_cdb[1] & 0x1f) { 4321c66ac9dbSNicholas Bellinger case PRI_READ_KEYS: 4322d29a5b6aSChristoph Hellwig ret = core_scsi3_pri_read_keys(cmd); 4323d29a5b6aSChristoph Hellwig break; 4324c66ac9dbSNicholas Bellinger case PRI_READ_RESERVATION: 4325d29a5b6aSChristoph Hellwig ret = core_scsi3_pri_read_reservation(cmd); 4326d29a5b6aSChristoph Hellwig break; 4327c66ac9dbSNicholas Bellinger case PRI_REPORT_CAPABILITIES: 4328d29a5b6aSChristoph Hellwig ret = core_scsi3_pri_report_capabilities(cmd); 4329d29a5b6aSChristoph Hellwig break; 4330c66ac9dbSNicholas Bellinger case PRI_READ_FULL_STATUS: 4331d29a5b6aSChristoph Hellwig ret = core_scsi3_pri_read_full_status(cmd); 4332d29a5b6aSChristoph Hellwig break; 4333c66ac9dbSNicholas Bellinger default: 43346708bb27SAndy Grover pr_err("Unknown PERSISTENT_RESERVE_IN service" 4335617c0e06SChristoph Hellwig " action: 0x%02x\n", cmd->t_task_cdb[1] & 0x1f); 433603e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; 433703e98c9eSNicholas Bellinger ret = -EINVAL; 4338d29a5b6aSChristoph Hellwig break; 4339c66ac9dbSNicholas Bellinger } 4340d29a5b6aSChristoph Hellwig 43416bb35e00SChristoph Hellwig if (!ret) 43426bb35e00SChristoph Hellwig target_complete_cmd(cmd, GOOD); 4343d29a5b6aSChristoph Hellwig return ret; 4344c66ac9dbSNicholas Bellinger } 4345c66ac9dbSNicholas Bellinger 4346c66ac9dbSNicholas Bellinger static int core_pt_reservation_check(struct se_cmd *cmd, u32 *pr_res_type) 4347c66ac9dbSNicholas Bellinger { 4348c66ac9dbSNicholas Bellinger return 0; 4349c66ac9dbSNicholas Bellinger } 4350c66ac9dbSNicholas Bellinger 4351c66ac9dbSNicholas Bellinger static int core_pt_seq_non_holder( 4352c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 4353c66ac9dbSNicholas Bellinger unsigned char *cdb, 4354c66ac9dbSNicholas Bellinger u32 pr_reg_type) 4355c66ac9dbSNicholas Bellinger { 4356c66ac9dbSNicholas Bellinger return 0; 4357c66ac9dbSNicholas Bellinger } 4358c66ac9dbSNicholas Bellinger 43590fd97ccfSChristoph Hellwig void core_setup_reservations(struct se_device *dev) 4360c66ac9dbSNicholas Bellinger { 43610fd97ccfSChristoph Hellwig struct t10_reservation *rest = &dev->t10_pr; 43620fd97ccfSChristoph Hellwig 4363c66ac9dbSNicholas Bellinger /* 4364c66ac9dbSNicholas Bellinger * If this device is from Target_Core_Mod/pSCSI, use the reservations 4365c66ac9dbSNicholas Bellinger * of the Underlying SCSI hardware. In Linux/SCSI terms, this can 4366c66ac9dbSNicholas Bellinger * cause a problem because libata and some SATA RAID HBAs appear 4367c66ac9dbSNicholas Bellinger * under Linux/SCSI, but to emulate reservations themselves. 4368c66ac9dbSNicholas Bellinger */ 43690fd97ccfSChristoph Hellwig if ((dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE) || 43700fd97ccfSChristoph Hellwig (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV && 43710fd97ccfSChristoph Hellwig !dev->dev_attrib.emulate_reservations)) { 4372c66ac9dbSNicholas Bellinger rest->res_type = SPC_PASSTHROUGH; 4373c66ac9dbSNicholas Bellinger rest->pr_ops.t10_reservation_check = &core_pt_reservation_check; 4374c66ac9dbSNicholas Bellinger rest->pr_ops.t10_seq_non_holder = &core_pt_seq_non_holder; 43756708bb27SAndy Grover pr_debug("%s: Using SPC_PASSTHROUGH, no reservation" 4376e3d6f909SAndy Grover " emulation\n", dev->transport->name); 43770fd97ccfSChristoph Hellwig } else if (dev->transport->get_device_rev(dev) >= SCSI_3) { 4378c66ac9dbSNicholas Bellinger rest->res_type = SPC3_PERSISTENT_RESERVATIONS; 4379c66ac9dbSNicholas Bellinger rest->pr_ops.t10_reservation_check = &core_scsi3_pr_reservation_check; 4380c66ac9dbSNicholas Bellinger rest->pr_ops.t10_seq_non_holder = &core_scsi3_pr_seq_non_holder; 43816708bb27SAndy Grover pr_debug("%s: Using SPC3_PERSISTENT_RESERVATIONS" 4382e3d6f909SAndy Grover " emulation\n", dev->transport->name); 4383c66ac9dbSNicholas Bellinger } else { 4384c66ac9dbSNicholas Bellinger rest->res_type = SPC2_RESERVATIONS; 4385c66ac9dbSNicholas Bellinger rest->pr_ops.t10_reservation_check = &core_scsi2_reservation_check; 4386c66ac9dbSNicholas Bellinger rest->pr_ops.t10_seq_non_holder = 4387c66ac9dbSNicholas Bellinger &core_scsi2_reservation_seq_non_holder; 43886708bb27SAndy Grover pr_debug("%s: Using SPC2_RESERVATIONS emulation\n", 4389e3d6f909SAndy Grover dev->transport->name); 4390c66ac9dbSNicholas Bellinger } 4391c66ac9dbSNicholas Bellinger } 4392