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 } 106c66ac9dbSNicholas Bellinger if (!(dev->dev_flags & DF_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 120eacac00cSChristoph Hellwig static int target_check_scsi2_reservation_conflict(struct se_cmd *cmd, int *ret) 121eacac00cSChristoph Hellwig { 122eacac00cSChristoph Hellwig struct se_session *se_sess = cmd->se_sess; 123eacac00cSChristoph Hellwig struct se_subsystem_dev *su_dev = cmd->se_dev->se_sub_dev; 124eacac00cSChristoph Hellwig struct t10_pr_registration *pr_reg; 125eacac00cSChristoph Hellwig struct t10_reservation *pr_tmpl = &su_dev->t10_pr; 126eacac00cSChristoph Hellwig int crh = (su_dev->t10_pr.res_type == SPC3_PERSISTENT_RESERVATIONS); 127eacac00cSChristoph Hellwig int conflict = 0; 128eacac00cSChristoph Hellwig 129eacac00cSChristoph Hellwig if (!crh) 130eacac00cSChristoph Hellwig return false; 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); 158eacac00cSChristoph Hellwig *ret = 0; 159eacac00cSChristoph Hellwig return false; 160eacac00cSChristoph Hellwig } 161eacac00cSChristoph Hellwig if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY) || 162eacac00cSChristoph Hellwig (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) || 163eacac00cSChristoph Hellwig (pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 164eacac00cSChristoph Hellwig (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { 165eacac00cSChristoph Hellwig core_scsi3_put_pr_reg(pr_reg); 166eacac00cSChristoph Hellwig *ret = 0; 167eacac00cSChristoph Hellwig return true; 168eacac00cSChristoph Hellwig } 169eacac00cSChristoph Hellwig core_scsi3_put_pr_reg(pr_reg); 170eacac00cSChristoph Hellwig conflict = 1; 171eacac00cSChristoph Hellwig } else { 172eacac00cSChristoph Hellwig /* 173eacac00cSChristoph Hellwig * Following spc2r20 5.5.1 Reservations overview: 174eacac00cSChristoph Hellwig * 175eacac00cSChristoph Hellwig * If a logical unit has executed a PERSISTENT RESERVE OUT 176eacac00cSChristoph Hellwig * command with the REGISTER or the REGISTER AND IGNORE 177eacac00cSChristoph Hellwig * EXISTING KEY service action and is still registered by any 178eacac00cSChristoph Hellwig * initiator, all RESERVE commands and all RELEASE commands 179eacac00cSChristoph Hellwig * regardless of initiator shall conflict and shall terminate 180eacac00cSChristoph Hellwig * with a RESERVATION CONFLICT status. 181eacac00cSChristoph Hellwig */ 182eacac00cSChristoph Hellwig spin_lock(&pr_tmpl->registration_lock); 183eacac00cSChristoph Hellwig conflict = (list_empty(&pr_tmpl->registration_list)) ? 0 : 1; 184eacac00cSChristoph Hellwig spin_unlock(&pr_tmpl->registration_lock); 185eacac00cSChristoph Hellwig } 186eacac00cSChristoph Hellwig 187eacac00cSChristoph Hellwig if (conflict) { 188eacac00cSChristoph Hellwig pr_err("Received legacy SPC-2 RESERVE/RELEASE" 189eacac00cSChristoph Hellwig " while active SPC-3 registrations exist," 190eacac00cSChristoph Hellwig " returning RESERVATION_CONFLICT\n"); 19103e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 192eacac00cSChristoph Hellwig return true; 193eacac00cSChristoph Hellwig } 194eacac00cSChristoph Hellwig 195eacac00cSChristoph Hellwig return false; 196eacac00cSChristoph Hellwig } 197eacac00cSChristoph Hellwig 198e76a35d6SChristoph Hellwig int target_scsi2_reservation_release(struct se_task *task) 199c66ac9dbSNicholas Bellinger { 200e76a35d6SChristoph Hellwig struct se_cmd *cmd = task->task_se_cmd; 201c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 202c66ac9dbSNicholas Bellinger struct se_session *sess = cmd->se_sess; 203c66ac9dbSNicholas Bellinger struct se_portal_group *tpg = sess->se_tpg; 204d29a5b6aSChristoph Hellwig int ret = 0; 205c66ac9dbSNicholas Bellinger 2066708bb27SAndy Grover if (!sess || !tpg) 207d29a5b6aSChristoph Hellwig goto out; 208eacac00cSChristoph Hellwig if (target_check_scsi2_reservation_conflict(cmd, &ret)) 209d29a5b6aSChristoph Hellwig goto out; 210c66ac9dbSNicholas Bellinger 211d29a5b6aSChristoph Hellwig ret = 0; 212c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 213d29a5b6aSChristoph Hellwig if (!dev->dev_reserved_node_acl || !sess) 214d29a5b6aSChristoph Hellwig goto out_unlock; 215c66ac9dbSNicholas Bellinger 216d29a5b6aSChristoph Hellwig if (dev->dev_reserved_node_acl != sess->se_node_acl) 217d29a5b6aSChristoph Hellwig goto out_unlock; 218d29a5b6aSChristoph Hellwig 219c66ac9dbSNicholas Bellinger dev->dev_reserved_node_acl = NULL; 220c66ac9dbSNicholas Bellinger dev->dev_flags &= ~DF_SPC2_RESERVATIONS; 221c66ac9dbSNicholas Bellinger if (dev->dev_flags & DF_SPC2_RESERVATIONS_WITH_ISID) { 222c66ac9dbSNicholas Bellinger dev->dev_res_bin_isid = 0; 223c66ac9dbSNicholas Bellinger dev->dev_flags &= ~DF_SPC2_RESERVATIONS_WITH_ISID; 224c66ac9dbSNicholas Bellinger } 2256708bb27SAndy Grover pr_debug("SCSI-2 Released reservation for %s LUN: %u ->" 226e3d6f909SAndy Grover " MAPPED LUN: %u for %s\n", tpg->se_tpg_tfo->get_fabric_name(), 227e3d6f909SAndy Grover cmd->se_lun->unpacked_lun, cmd->se_deve->mapped_lun, 228c66ac9dbSNicholas Bellinger sess->se_node_acl->initiatorname); 229c66ac9dbSNicholas Bellinger 230d29a5b6aSChristoph Hellwig out_unlock: 231d29a5b6aSChristoph Hellwig spin_unlock(&dev->dev_reservation_lock); 232d29a5b6aSChristoph Hellwig out: 233d29a5b6aSChristoph Hellwig if (!ret) { 234d29a5b6aSChristoph Hellwig task->task_scsi_status = GOOD; 235d29a5b6aSChristoph Hellwig transport_complete_task(task, 1); 236d29a5b6aSChristoph Hellwig } 237d29a5b6aSChristoph Hellwig return ret; 238c66ac9dbSNicholas Bellinger } 239c66ac9dbSNicholas Bellinger 240e76a35d6SChristoph Hellwig int target_scsi2_reservation_reserve(struct se_task *task) 241c66ac9dbSNicholas Bellinger { 242e76a35d6SChristoph Hellwig struct se_cmd *cmd = task->task_se_cmd; 243c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 244c66ac9dbSNicholas Bellinger struct se_session *sess = cmd->se_sess; 245c66ac9dbSNicholas Bellinger struct se_portal_group *tpg = sess->se_tpg; 246d29a5b6aSChristoph Hellwig int ret = 0; 247c66ac9dbSNicholas Bellinger 248a1d8b49aSAndy Grover if ((cmd->t_task_cdb[1] & 0x01) && 249a1d8b49aSAndy Grover (cmd->t_task_cdb[1] & 0x02)) { 2506708bb27SAndy Grover pr_err("LongIO and Obselete Bits set, returning" 251c66ac9dbSNicholas Bellinger " ILLEGAL_REQUEST\n"); 25203e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; 25303e98c9eSNicholas Bellinger ret = -EINVAL; 254d29a5b6aSChristoph Hellwig goto out; 255c66ac9dbSNicholas Bellinger } 256c66ac9dbSNicholas Bellinger /* 257c66ac9dbSNicholas Bellinger * This is currently the case for target_core_mod passthrough struct se_cmd 258c66ac9dbSNicholas Bellinger * ops 259c66ac9dbSNicholas Bellinger */ 2606708bb27SAndy Grover if (!sess || !tpg) 261d29a5b6aSChristoph Hellwig goto out; 262eacac00cSChristoph Hellwig if (target_check_scsi2_reservation_conflict(cmd, &ret)) 263d29a5b6aSChristoph Hellwig goto out; 264c66ac9dbSNicholas Bellinger 265d29a5b6aSChristoph Hellwig ret = 0; 266c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 267c66ac9dbSNicholas Bellinger if (dev->dev_reserved_node_acl && 268c66ac9dbSNicholas Bellinger (dev->dev_reserved_node_acl != sess->se_node_acl)) { 2696708bb27SAndy Grover pr_err("SCSI-2 RESERVATION CONFLIFT for %s fabric\n", 270e3d6f909SAndy Grover tpg->se_tpg_tfo->get_fabric_name()); 2716708bb27SAndy Grover pr_err("Original reserver LUN: %u %s\n", 272e3d6f909SAndy Grover cmd->se_lun->unpacked_lun, 273c66ac9dbSNicholas Bellinger dev->dev_reserved_node_acl->initiatorname); 2746708bb27SAndy Grover pr_err("Current attempt - LUN: %u -> MAPPED LUN: %u" 275e3d6f909SAndy Grover " from %s \n", cmd->se_lun->unpacked_lun, 276c66ac9dbSNicholas Bellinger cmd->se_deve->mapped_lun, 277c66ac9dbSNicholas Bellinger sess->se_node_acl->initiatorname); 27803e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 27903e98c9eSNicholas Bellinger ret = -EINVAL; 280d29a5b6aSChristoph Hellwig goto out_unlock; 281c66ac9dbSNicholas Bellinger } 282c66ac9dbSNicholas Bellinger 283c66ac9dbSNicholas Bellinger dev->dev_reserved_node_acl = sess->se_node_acl; 284c66ac9dbSNicholas Bellinger dev->dev_flags |= DF_SPC2_RESERVATIONS; 285c66ac9dbSNicholas Bellinger if (sess->sess_bin_isid != 0) { 286c66ac9dbSNicholas Bellinger dev->dev_res_bin_isid = sess->sess_bin_isid; 287c66ac9dbSNicholas Bellinger dev->dev_flags |= DF_SPC2_RESERVATIONS_WITH_ISID; 288c66ac9dbSNicholas Bellinger } 2896708bb27SAndy Grover pr_debug("SCSI-2 Reserved %s LUN: %u -> MAPPED LUN: %u" 290e3d6f909SAndy Grover " for %s\n", tpg->se_tpg_tfo->get_fabric_name(), 291e3d6f909SAndy Grover cmd->se_lun->unpacked_lun, cmd->se_deve->mapped_lun, 292c66ac9dbSNicholas Bellinger sess->se_node_acl->initiatorname); 293c66ac9dbSNicholas Bellinger 294d29a5b6aSChristoph Hellwig out_unlock: 295d29a5b6aSChristoph Hellwig spin_unlock(&dev->dev_reservation_lock); 296d29a5b6aSChristoph Hellwig out: 297d29a5b6aSChristoph Hellwig if (!ret) { 298d29a5b6aSChristoph Hellwig task->task_scsi_status = GOOD; 299d29a5b6aSChristoph Hellwig transport_complete_task(task, 1); 300d29a5b6aSChristoph Hellwig } 301d29a5b6aSChristoph Hellwig return ret; 302c66ac9dbSNicholas Bellinger } 303c66ac9dbSNicholas Bellinger 304c66ac9dbSNicholas Bellinger 305c66ac9dbSNicholas Bellinger /* 306c66ac9dbSNicholas Bellinger * Begin SPC-3/SPC-4 Persistent Reservations emulation support 307c66ac9dbSNicholas Bellinger * 308c66ac9dbSNicholas Bellinger * This function is called by those initiator ports who are *NOT* 309c66ac9dbSNicholas Bellinger * the active PR reservation holder when a reservation is present. 310c66ac9dbSNicholas Bellinger */ 311c66ac9dbSNicholas Bellinger static int core_scsi3_pr_seq_non_holder( 312c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 313c66ac9dbSNicholas Bellinger unsigned char *cdb, 314c66ac9dbSNicholas Bellinger u32 pr_reg_type) 315c66ac9dbSNicholas Bellinger { 316c66ac9dbSNicholas Bellinger struct se_dev_entry *se_deve; 317e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 318c66ac9dbSNicholas Bellinger int other_cdb = 0, ignore_reg; 319c66ac9dbSNicholas Bellinger int registered_nexus = 0, ret = 1; /* Conflict by default */ 320c66ac9dbSNicholas Bellinger int all_reg = 0, reg_only = 0; /* ALL_REG, REG_ONLY */ 321c66ac9dbSNicholas Bellinger int we = 0; /* Write Exclusive */ 322c66ac9dbSNicholas Bellinger int legacy = 0; /* Act like a legacy device and return 323c66ac9dbSNicholas Bellinger * RESERVATION CONFLICT on some CDBs */ 324c66ac9dbSNicholas Bellinger /* 325c66ac9dbSNicholas Bellinger * A legacy SPC-2 reservation is being held. 326c66ac9dbSNicholas Bellinger */ 327c66ac9dbSNicholas Bellinger if (cmd->se_dev->dev_flags & DF_SPC2_RESERVATIONS) 328c66ac9dbSNicholas Bellinger return core_scsi2_reservation_seq_non_holder(cmd, 329c66ac9dbSNicholas Bellinger cdb, pr_reg_type); 330c66ac9dbSNicholas Bellinger 331c66ac9dbSNicholas Bellinger se_deve = &se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; 332c66ac9dbSNicholas Bellinger /* 333c66ac9dbSNicholas Bellinger * Determine if the registration should be ignored due to 334c66ac9dbSNicholas Bellinger * non-matching ISIDs in core_scsi3_pr_reservation_check(). 335c66ac9dbSNicholas Bellinger */ 336c66ac9dbSNicholas Bellinger ignore_reg = (pr_reg_type & 0x80000000); 337c66ac9dbSNicholas Bellinger if (ignore_reg) 338c66ac9dbSNicholas Bellinger pr_reg_type &= ~0x80000000; 339c66ac9dbSNicholas Bellinger 340c66ac9dbSNicholas Bellinger switch (pr_reg_type) { 341c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE: 342c66ac9dbSNicholas Bellinger we = 1; 343c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS: 344c66ac9dbSNicholas Bellinger /* 345c66ac9dbSNicholas Bellinger * Some commands are only allowed for the persistent reservation 346c66ac9dbSNicholas Bellinger * holder. 347c66ac9dbSNicholas Bellinger */ 348c66ac9dbSNicholas Bellinger if ((se_deve->def_pr_registered) && !(ignore_reg)) 349c66ac9dbSNicholas Bellinger registered_nexus = 1; 350c66ac9dbSNicholas Bellinger break; 351c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: 352c66ac9dbSNicholas Bellinger we = 1; 353c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: 354c66ac9dbSNicholas Bellinger /* 355c66ac9dbSNicholas Bellinger * Some commands are only allowed for registered I_T Nexuses. 356c66ac9dbSNicholas Bellinger */ 357c66ac9dbSNicholas Bellinger reg_only = 1; 358c66ac9dbSNicholas Bellinger if ((se_deve->def_pr_registered) && !(ignore_reg)) 359c66ac9dbSNicholas Bellinger registered_nexus = 1; 360c66ac9dbSNicholas Bellinger break; 361c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: 362c66ac9dbSNicholas Bellinger we = 1; 363c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: 364c66ac9dbSNicholas Bellinger /* 365c66ac9dbSNicholas Bellinger * Each registered I_T Nexus is a reservation holder. 366c66ac9dbSNicholas Bellinger */ 367c66ac9dbSNicholas Bellinger all_reg = 1; 368c66ac9dbSNicholas Bellinger if ((se_deve->def_pr_registered) && !(ignore_reg)) 369c66ac9dbSNicholas Bellinger registered_nexus = 1; 370c66ac9dbSNicholas Bellinger break; 371c66ac9dbSNicholas Bellinger default: 372e3d6f909SAndy Grover return -EINVAL; 373c66ac9dbSNicholas Bellinger } 374c66ac9dbSNicholas Bellinger /* 375c66ac9dbSNicholas Bellinger * Referenced from spc4r17 table 45 for *NON* PR holder access 376c66ac9dbSNicholas Bellinger */ 377c66ac9dbSNicholas Bellinger switch (cdb[0]) { 378c66ac9dbSNicholas Bellinger case SECURITY_PROTOCOL_IN: 379c66ac9dbSNicholas Bellinger if (registered_nexus) 380c66ac9dbSNicholas Bellinger return 0; 381c66ac9dbSNicholas Bellinger ret = (we) ? 0 : 1; 382c66ac9dbSNicholas Bellinger break; 383c66ac9dbSNicholas Bellinger case MODE_SENSE: 384c66ac9dbSNicholas Bellinger case MODE_SENSE_10: 385c66ac9dbSNicholas Bellinger case READ_ATTRIBUTE: 386c66ac9dbSNicholas Bellinger case READ_BUFFER: 387c66ac9dbSNicholas Bellinger case RECEIVE_DIAGNOSTIC: 388c66ac9dbSNicholas Bellinger if (legacy) { 389c66ac9dbSNicholas Bellinger ret = 1; 390c66ac9dbSNicholas Bellinger break; 391c66ac9dbSNicholas Bellinger } 392c66ac9dbSNicholas Bellinger if (registered_nexus) { 393c66ac9dbSNicholas Bellinger ret = 0; 394c66ac9dbSNicholas Bellinger break; 395c66ac9dbSNicholas Bellinger } 396c66ac9dbSNicholas Bellinger ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ 397c66ac9dbSNicholas Bellinger break; 398c66ac9dbSNicholas Bellinger case PERSISTENT_RESERVE_OUT: 399c66ac9dbSNicholas Bellinger /* 400c66ac9dbSNicholas Bellinger * This follows PERSISTENT_RESERVE_OUT service actions that 401c66ac9dbSNicholas Bellinger * are allowed in the presence of various reservations. 402c66ac9dbSNicholas Bellinger * See spc4r17, table 46 403c66ac9dbSNicholas Bellinger */ 404c66ac9dbSNicholas Bellinger switch (cdb[1] & 0x1f) { 405c66ac9dbSNicholas Bellinger case PRO_CLEAR: 406c66ac9dbSNicholas Bellinger case PRO_PREEMPT: 407c66ac9dbSNicholas Bellinger case PRO_PREEMPT_AND_ABORT: 408c66ac9dbSNicholas Bellinger ret = (registered_nexus) ? 0 : 1; 409c66ac9dbSNicholas Bellinger break; 410c66ac9dbSNicholas Bellinger case PRO_REGISTER: 411c66ac9dbSNicholas Bellinger case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: 412c66ac9dbSNicholas Bellinger ret = 0; 413c66ac9dbSNicholas Bellinger break; 414c66ac9dbSNicholas Bellinger case PRO_REGISTER_AND_MOVE: 415c66ac9dbSNicholas Bellinger case PRO_RESERVE: 416c66ac9dbSNicholas Bellinger ret = 1; 417c66ac9dbSNicholas Bellinger break; 418c66ac9dbSNicholas Bellinger case PRO_RELEASE: 419c66ac9dbSNicholas Bellinger ret = (registered_nexus) ? 0 : 1; 420c66ac9dbSNicholas Bellinger break; 421c66ac9dbSNicholas Bellinger default: 4226708bb27SAndy Grover pr_err("Unknown PERSISTENT_RESERVE_OUT service" 423c66ac9dbSNicholas Bellinger " action: 0x%02x\n", cdb[1] & 0x1f); 424e3d6f909SAndy Grover return -EINVAL; 425c66ac9dbSNicholas Bellinger } 426c66ac9dbSNicholas Bellinger break; 427c66ac9dbSNicholas Bellinger case RELEASE: 428c66ac9dbSNicholas Bellinger case RELEASE_10: 429eacac00cSChristoph Hellwig /* Handled by CRH=1 in target_scsi2_reservation_release() */ 430c66ac9dbSNicholas Bellinger ret = 0; 431c66ac9dbSNicholas Bellinger break; 432c66ac9dbSNicholas Bellinger case RESERVE: 433c66ac9dbSNicholas Bellinger case RESERVE_10: 434eacac00cSChristoph Hellwig /* Handled by CRH=1 in target_scsi2_reservation_reserve() */ 435c66ac9dbSNicholas Bellinger ret = 0; 436c66ac9dbSNicholas Bellinger break; 437c66ac9dbSNicholas Bellinger case TEST_UNIT_READY: 438c66ac9dbSNicholas Bellinger ret = (legacy) ? 1 : 0; /* Conflict for legacy */ 439c66ac9dbSNicholas Bellinger break; 440c66ac9dbSNicholas Bellinger case MAINTENANCE_IN: 441c66ac9dbSNicholas Bellinger switch (cdb[1] & 0x1f) { 442c66ac9dbSNicholas Bellinger case MI_MANAGEMENT_PROTOCOL_IN: 443c66ac9dbSNicholas Bellinger if (registered_nexus) { 444c66ac9dbSNicholas Bellinger ret = 0; 445c66ac9dbSNicholas Bellinger break; 446c66ac9dbSNicholas Bellinger } 447c66ac9dbSNicholas Bellinger ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ 448c66ac9dbSNicholas Bellinger break; 449c66ac9dbSNicholas Bellinger case MI_REPORT_SUPPORTED_OPERATION_CODES: 450c66ac9dbSNicholas Bellinger case MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS: 451c66ac9dbSNicholas Bellinger if (legacy) { 452c66ac9dbSNicholas Bellinger ret = 1; 453c66ac9dbSNicholas Bellinger break; 454c66ac9dbSNicholas Bellinger } 455c66ac9dbSNicholas Bellinger if (registered_nexus) { 456c66ac9dbSNicholas Bellinger ret = 0; 457c66ac9dbSNicholas Bellinger break; 458c66ac9dbSNicholas Bellinger } 459c66ac9dbSNicholas Bellinger ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ 460c66ac9dbSNicholas Bellinger break; 461c66ac9dbSNicholas Bellinger case MI_REPORT_ALIASES: 462c66ac9dbSNicholas Bellinger case MI_REPORT_IDENTIFYING_INFORMATION: 463c66ac9dbSNicholas Bellinger case MI_REPORT_PRIORITY: 464c66ac9dbSNicholas Bellinger case MI_REPORT_TARGET_PGS: 465c66ac9dbSNicholas Bellinger case MI_REPORT_TIMESTAMP: 466c66ac9dbSNicholas Bellinger ret = 0; /* Allowed */ 467c66ac9dbSNicholas Bellinger break; 468c66ac9dbSNicholas Bellinger default: 4696708bb27SAndy Grover pr_err("Unknown MI Service Action: 0x%02x\n", 470c66ac9dbSNicholas Bellinger (cdb[1] & 0x1f)); 471e3d6f909SAndy Grover return -EINVAL; 472c66ac9dbSNicholas Bellinger } 473c66ac9dbSNicholas Bellinger break; 474c66ac9dbSNicholas Bellinger case ACCESS_CONTROL_IN: 475c66ac9dbSNicholas Bellinger case ACCESS_CONTROL_OUT: 476c66ac9dbSNicholas Bellinger case INQUIRY: 477c66ac9dbSNicholas Bellinger case LOG_SENSE: 478c66ac9dbSNicholas Bellinger case READ_MEDIA_SERIAL_NUMBER: 479c66ac9dbSNicholas Bellinger case REPORT_LUNS: 480c66ac9dbSNicholas Bellinger case REQUEST_SENSE: 4816816966aSMarco Sanvido case PERSISTENT_RESERVE_IN: 482c66ac9dbSNicholas Bellinger ret = 0; /*/ Allowed CDBs */ 483c66ac9dbSNicholas Bellinger break; 484c66ac9dbSNicholas Bellinger default: 485c66ac9dbSNicholas Bellinger other_cdb = 1; 486c66ac9dbSNicholas Bellinger break; 487c66ac9dbSNicholas Bellinger } 488c66ac9dbSNicholas Bellinger /* 48925985edcSLucas De Marchi * Case where the CDB is explicitly allowed in the above switch 490c66ac9dbSNicholas Bellinger * statement. 491c66ac9dbSNicholas Bellinger */ 4926708bb27SAndy Grover if (!ret && !other_cdb) { 493c66ac9dbSNicholas Bellinger #if 0 4946708bb27SAndy Grover pr_debug("Allowing explict CDB: 0x%02x for %s" 495c66ac9dbSNicholas Bellinger " reservation holder\n", cdb[0], 496c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 497c66ac9dbSNicholas Bellinger #endif 498c66ac9dbSNicholas Bellinger return ret; 499c66ac9dbSNicholas Bellinger } 500c66ac9dbSNicholas Bellinger /* 501c66ac9dbSNicholas Bellinger * Check if write exclusive initiator ports *NOT* holding the 502c66ac9dbSNicholas Bellinger * WRITE_EXCLUSIVE_* reservation. 503c66ac9dbSNicholas Bellinger */ 504c66ac9dbSNicholas Bellinger if ((we) && !(registered_nexus)) { 505c66ac9dbSNicholas Bellinger if (cmd->data_direction == DMA_TO_DEVICE) { 506c66ac9dbSNicholas Bellinger /* 507c66ac9dbSNicholas Bellinger * Conflict for write exclusive 508c66ac9dbSNicholas Bellinger */ 5096708bb27SAndy Grover pr_debug("%s Conflict for unregistered nexus" 510c66ac9dbSNicholas Bellinger " %s CDB: 0x%02x to %s reservation\n", 511c66ac9dbSNicholas Bellinger transport_dump_cmd_direction(cmd), 512c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, cdb[0], 513c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 514c66ac9dbSNicholas Bellinger return 1; 515c66ac9dbSNicholas Bellinger } else { 516c66ac9dbSNicholas Bellinger /* 517c66ac9dbSNicholas Bellinger * Allow non WRITE CDBs for all Write Exclusive 518c66ac9dbSNicholas Bellinger * PR TYPEs to pass for registered and 519c66ac9dbSNicholas Bellinger * non-registered_nexuxes NOT holding the reservation. 520c66ac9dbSNicholas Bellinger * 521c66ac9dbSNicholas Bellinger * We only make noise for the unregisterd nexuses, 522c66ac9dbSNicholas Bellinger * as we expect registered non-reservation holding 523c66ac9dbSNicholas Bellinger * nexuses to issue CDBs. 524c66ac9dbSNicholas Bellinger */ 525c66ac9dbSNicholas Bellinger #if 0 5266708bb27SAndy Grover if (!registered_nexus) { 5276708bb27SAndy Grover pr_debug("Allowing implict CDB: 0x%02x" 528c66ac9dbSNicholas Bellinger " for %s reservation on unregistered" 529c66ac9dbSNicholas Bellinger " nexus\n", cdb[0], 530c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 531c66ac9dbSNicholas Bellinger } 532c66ac9dbSNicholas Bellinger #endif 533c66ac9dbSNicholas Bellinger return 0; 534c66ac9dbSNicholas Bellinger } 535c66ac9dbSNicholas Bellinger } else if ((reg_only) || (all_reg)) { 536c66ac9dbSNicholas Bellinger if (registered_nexus) { 537c66ac9dbSNicholas Bellinger /* 538c66ac9dbSNicholas Bellinger * For PR_*_REG_ONLY and PR_*_ALL_REG reservations, 539c66ac9dbSNicholas Bellinger * allow commands from registered nexuses. 540c66ac9dbSNicholas Bellinger */ 541c66ac9dbSNicholas Bellinger #if 0 5426708bb27SAndy Grover pr_debug("Allowing implict CDB: 0x%02x for %s" 543c66ac9dbSNicholas Bellinger " reservation\n", cdb[0], 544c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 545c66ac9dbSNicholas Bellinger #endif 546c66ac9dbSNicholas Bellinger return 0; 547c66ac9dbSNicholas Bellinger } 548c66ac9dbSNicholas Bellinger } 5496708bb27SAndy Grover pr_debug("%s Conflict for %sregistered nexus %s CDB: 0x%2x" 550c66ac9dbSNicholas Bellinger " for %s reservation\n", transport_dump_cmd_direction(cmd), 551c66ac9dbSNicholas Bellinger (registered_nexus) ? "" : "un", 552c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, cdb[0], 553c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 554c66ac9dbSNicholas Bellinger 555c66ac9dbSNicholas Bellinger return 1; /* Conflict by default */ 556c66ac9dbSNicholas Bellinger } 557c66ac9dbSNicholas Bellinger 558c66ac9dbSNicholas Bellinger static u32 core_scsi3_pr_generation(struct se_device *dev) 559c66ac9dbSNicholas Bellinger { 560e3d6f909SAndy Grover struct se_subsystem_dev *su_dev = dev->se_sub_dev; 561c66ac9dbSNicholas Bellinger u32 prg; 562c66ac9dbSNicholas Bellinger /* 563c66ac9dbSNicholas Bellinger * PRGeneration field shall contain the value of a 32-bit wrapping 564c66ac9dbSNicholas Bellinger * counter mainted by the device server. 565c66ac9dbSNicholas Bellinger * 566c66ac9dbSNicholas Bellinger * Note that this is done regardless of Active Persist across 567c66ac9dbSNicholas Bellinger * Target PowerLoss (APTPL) 568c66ac9dbSNicholas Bellinger * 569c66ac9dbSNicholas Bellinger * See spc4r17 section 6.3.12 READ_KEYS service action 570c66ac9dbSNicholas Bellinger */ 571c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 572e3d6f909SAndy Grover prg = su_dev->t10_pr.pr_generation++; 573c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 574c66ac9dbSNicholas Bellinger 575c66ac9dbSNicholas Bellinger return prg; 576c66ac9dbSNicholas Bellinger } 577c66ac9dbSNicholas Bellinger 578c66ac9dbSNicholas Bellinger static int core_scsi3_pr_reservation_check( 579c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 580c66ac9dbSNicholas Bellinger u32 *pr_reg_type) 581c66ac9dbSNicholas Bellinger { 582c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 583c66ac9dbSNicholas Bellinger struct se_session *sess = cmd->se_sess; 584c66ac9dbSNicholas Bellinger int ret; 585c66ac9dbSNicholas Bellinger 5866708bb27SAndy Grover if (!sess) 587c66ac9dbSNicholas Bellinger return 0; 588c66ac9dbSNicholas Bellinger /* 589c66ac9dbSNicholas Bellinger * A legacy SPC-2 reservation is being held. 590c66ac9dbSNicholas Bellinger */ 591c66ac9dbSNicholas Bellinger if (dev->dev_flags & DF_SPC2_RESERVATIONS) 592c66ac9dbSNicholas Bellinger return core_scsi2_reservation_check(cmd, pr_reg_type); 593c66ac9dbSNicholas Bellinger 594c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 5956708bb27SAndy Grover if (!dev->dev_pr_res_holder) { 596c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 597c66ac9dbSNicholas Bellinger return 0; 598c66ac9dbSNicholas Bellinger } 599c66ac9dbSNicholas Bellinger *pr_reg_type = dev->dev_pr_res_holder->pr_res_type; 600c66ac9dbSNicholas Bellinger cmd->pr_res_key = dev->dev_pr_res_holder->pr_res_key; 601c66ac9dbSNicholas Bellinger if (dev->dev_pr_res_holder->pr_reg_nacl != sess->se_node_acl) { 602c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 603e3d6f909SAndy Grover return -EINVAL; 604c66ac9dbSNicholas Bellinger } 6056708bb27SAndy Grover if (!dev->dev_pr_res_holder->isid_present_at_reg) { 606c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 607c66ac9dbSNicholas Bellinger return 0; 608c66ac9dbSNicholas Bellinger } 609c66ac9dbSNicholas Bellinger ret = (dev->dev_pr_res_holder->pr_reg_bin_isid == 610e3d6f909SAndy Grover sess->sess_bin_isid) ? 0 : -EINVAL; 611c66ac9dbSNicholas Bellinger /* 612c66ac9dbSNicholas Bellinger * Use bit in *pr_reg_type to notify ISID mismatch in 613c66ac9dbSNicholas Bellinger * core_scsi3_pr_seq_non_holder(). 614c66ac9dbSNicholas Bellinger */ 615c66ac9dbSNicholas Bellinger if (ret != 0) 616c66ac9dbSNicholas Bellinger *pr_reg_type |= 0x80000000; 617c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 618c66ac9dbSNicholas Bellinger 619c66ac9dbSNicholas Bellinger return ret; 620c66ac9dbSNicholas Bellinger } 621c66ac9dbSNicholas Bellinger 622c66ac9dbSNicholas Bellinger static struct t10_pr_registration *__core_scsi3_do_alloc_registration( 623c66ac9dbSNicholas Bellinger struct se_device *dev, 624c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 625c66ac9dbSNicholas Bellinger struct se_dev_entry *deve, 626c66ac9dbSNicholas Bellinger unsigned char *isid, 627c66ac9dbSNicholas Bellinger u64 sa_res_key, 628c66ac9dbSNicholas Bellinger int all_tg_pt, 629c66ac9dbSNicholas Bellinger int aptpl) 630c66ac9dbSNicholas Bellinger { 631e3d6f909SAndy Grover struct se_subsystem_dev *su_dev = dev->se_sub_dev; 632c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 633c66ac9dbSNicholas Bellinger 634c66ac9dbSNicholas Bellinger pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_ATOMIC); 6356708bb27SAndy Grover if (!pr_reg) { 6366708bb27SAndy Grover pr_err("Unable to allocate struct t10_pr_registration\n"); 637c66ac9dbSNicholas Bellinger return NULL; 638c66ac9dbSNicholas Bellinger } 639c66ac9dbSNicholas Bellinger 640e3d6f909SAndy Grover pr_reg->pr_aptpl_buf = kzalloc(su_dev->t10_pr.pr_aptpl_buf_len, 641c66ac9dbSNicholas Bellinger GFP_ATOMIC); 6426708bb27SAndy Grover if (!pr_reg->pr_aptpl_buf) { 6436708bb27SAndy Grover pr_err("Unable to allocate pr_reg->pr_aptpl_buf\n"); 644c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 645c66ac9dbSNicholas Bellinger return NULL; 646c66ac9dbSNicholas Bellinger } 647c66ac9dbSNicholas Bellinger 648c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_list); 649c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list); 650c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list); 651c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list); 652c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list); 653c66ac9dbSNicholas Bellinger atomic_set(&pr_reg->pr_res_holders, 0); 654c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = nacl; 655c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve = deve; 656c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun = deve->mapped_lun; 657c66ac9dbSNicholas Bellinger pr_reg->pr_aptpl_target_lun = deve->se_lun->unpacked_lun; 658c66ac9dbSNicholas Bellinger pr_reg->pr_res_key = sa_res_key; 659c66ac9dbSNicholas Bellinger pr_reg->pr_reg_all_tg_pt = all_tg_pt; 660c66ac9dbSNicholas Bellinger pr_reg->pr_reg_aptpl = aptpl; 661c66ac9dbSNicholas Bellinger pr_reg->pr_reg_tg_pt_lun = deve->se_lun; 662c66ac9dbSNicholas Bellinger /* 663c66ac9dbSNicholas Bellinger * If an ISID value for this SCSI Initiator Port exists, 664c66ac9dbSNicholas Bellinger * save it to the registration now. 665c66ac9dbSNicholas Bellinger */ 666c66ac9dbSNicholas Bellinger if (isid != NULL) { 667c66ac9dbSNicholas Bellinger pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid); 668c66ac9dbSNicholas Bellinger snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid); 669c66ac9dbSNicholas Bellinger pr_reg->isid_present_at_reg = 1; 670c66ac9dbSNicholas Bellinger } 671c66ac9dbSNicholas Bellinger 672c66ac9dbSNicholas Bellinger return pr_reg; 673c66ac9dbSNicholas Bellinger } 674c66ac9dbSNicholas Bellinger 675c66ac9dbSNicholas Bellinger static int core_scsi3_lunacl_depend_item(struct se_dev_entry *); 676c66ac9dbSNicholas Bellinger static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *); 677c66ac9dbSNicholas Bellinger 678c66ac9dbSNicholas Bellinger /* 679c66ac9dbSNicholas Bellinger * Function used for handling PR registrations for ALL_TG_PT=1 and ALL_TG_PT=0 680c66ac9dbSNicholas Bellinger * modes. 681c66ac9dbSNicholas Bellinger */ 682c66ac9dbSNicholas Bellinger static struct t10_pr_registration *__core_scsi3_alloc_registration( 683c66ac9dbSNicholas Bellinger struct se_device *dev, 684c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 685c66ac9dbSNicholas Bellinger struct se_dev_entry *deve, 686c66ac9dbSNicholas Bellinger unsigned char *isid, 687c66ac9dbSNicholas Bellinger u64 sa_res_key, 688c66ac9dbSNicholas Bellinger int all_tg_pt, 689c66ac9dbSNicholas Bellinger int aptpl) 690c66ac9dbSNicholas Bellinger { 691c66ac9dbSNicholas Bellinger struct se_dev_entry *deve_tmp; 692c66ac9dbSNicholas Bellinger struct se_node_acl *nacl_tmp; 693c66ac9dbSNicholas Bellinger struct se_port *port, *port_tmp; 694c66ac9dbSNicholas Bellinger struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; 695c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_atp, *pr_reg_tmp, *pr_reg_tmp_safe; 696c66ac9dbSNicholas Bellinger int ret; 697c66ac9dbSNicholas Bellinger /* 698c66ac9dbSNicholas Bellinger * Create a registration for the I_T Nexus upon which the 699c66ac9dbSNicholas Bellinger * PROUT REGISTER was received. 700c66ac9dbSNicholas Bellinger */ 701c66ac9dbSNicholas Bellinger pr_reg = __core_scsi3_do_alloc_registration(dev, nacl, deve, isid, 702c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl); 7036708bb27SAndy Grover if (!pr_reg) 704c66ac9dbSNicholas Bellinger return NULL; 705c66ac9dbSNicholas Bellinger /* 706c66ac9dbSNicholas Bellinger * Return pointer to pr_reg for ALL_TG_PT=0 707c66ac9dbSNicholas Bellinger */ 7086708bb27SAndy Grover if (!all_tg_pt) 709c66ac9dbSNicholas Bellinger return pr_reg; 710c66ac9dbSNicholas Bellinger /* 711c66ac9dbSNicholas Bellinger * Create list of matching SCSI Initiator Port registrations 712c66ac9dbSNicholas Bellinger * for ALL_TG_PT=1 713c66ac9dbSNicholas Bellinger */ 714c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 715c66ac9dbSNicholas Bellinger list_for_each_entry_safe(port, port_tmp, &dev->dev_sep_list, sep_list) { 716c66ac9dbSNicholas Bellinger atomic_inc(&port->sep_tg_pt_ref_cnt); 717c66ac9dbSNicholas Bellinger smp_mb__after_atomic_inc(); 718c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 719c66ac9dbSNicholas Bellinger 720c66ac9dbSNicholas Bellinger spin_lock_bh(&port->sep_alua_lock); 721c66ac9dbSNicholas Bellinger list_for_each_entry(deve_tmp, &port->sep_alua_list, 722c66ac9dbSNicholas Bellinger alua_port_list) { 723c66ac9dbSNicholas Bellinger /* 724c66ac9dbSNicholas Bellinger * This pointer will be NULL for demo mode MappedLUNs 725c66ac9dbSNicholas Bellinger * that have not been make explict via a ConfigFS 726c66ac9dbSNicholas Bellinger * MappedLUN group for the SCSI Initiator Node ACL. 727c66ac9dbSNicholas Bellinger */ 7286708bb27SAndy Grover if (!deve_tmp->se_lun_acl) 729c66ac9dbSNicholas Bellinger continue; 730c66ac9dbSNicholas Bellinger 731c66ac9dbSNicholas Bellinger nacl_tmp = deve_tmp->se_lun_acl->se_lun_nacl; 732c66ac9dbSNicholas Bellinger /* 733c66ac9dbSNicholas Bellinger * Skip the matching struct se_node_acl that is allocated 734c66ac9dbSNicholas Bellinger * above.. 735c66ac9dbSNicholas Bellinger */ 736c66ac9dbSNicholas Bellinger if (nacl == nacl_tmp) 737c66ac9dbSNicholas Bellinger continue; 738c66ac9dbSNicholas Bellinger /* 739c66ac9dbSNicholas Bellinger * Only perform PR registrations for target ports on 740c66ac9dbSNicholas Bellinger * the same fabric module as the REGISTER w/ ALL_TG_PT=1 741c66ac9dbSNicholas Bellinger * arrived. 742c66ac9dbSNicholas Bellinger */ 743c66ac9dbSNicholas Bellinger if (tfo != nacl_tmp->se_tpg->se_tpg_tfo) 744c66ac9dbSNicholas Bellinger continue; 745c66ac9dbSNicholas Bellinger /* 746c66ac9dbSNicholas Bellinger * Look for a matching Initiator Node ACL in ASCII format 747c66ac9dbSNicholas Bellinger */ 748c66ac9dbSNicholas Bellinger if (strcmp(nacl->initiatorname, nacl_tmp->initiatorname)) 749c66ac9dbSNicholas Bellinger continue; 750c66ac9dbSNicholas Bellinger 751c66ac9dbSNicholas Bellinger atomic_inc(&deve_tmp->pr_ref_count); 752c66ac9dbSNicholas Bellinger smp_mb__after_atomic_inc(); 753c66ac9dbSNicholas Bellinger spin_unlock_bh(&port->sep_alua_lock); 754c66ac9dbSNicholas Bellinger /* 755c66ac9dbSNicholas Bellinger * Grab a configfs group dependency that is released 756c66ac9dbSNicholas Bellinger * for the exception path at label out: below, or upon 757c66ac9dbSNicholas Bellinger * completion of adding ALL_TG_PT=1 registrations in 758c66ac9dbSNicholas Bellinger * __core_scsi3_add_registration() 759c66ac9dbSNicholas Bellinger */ 760c66ac9dbSNicholas Bellinger ret = core_scsi3_lunacl_depend_item(deve_tmp); 761c66ac9dbSNicholas Bellinger if (ret < 0) { 7626708bb27SAndy Grover pr_err("core_scsi3_lunacl_depend" 763c66ac9dbSNicholas Bellinger "_item() failed\n"); 764c66ac9dbSNicholas Bellinger atomic_dec(&port->sep_tg_pt_ref_cnt); 765c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 766c66ac9dbSNicholas Bellinger atomic_dec(&deve_tmp->pr_ref_count); 767c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 768c66ac9dbSNicholas Bellinger goto out; 769c66ac9dbSNicholas Bellinger } 770c66ac9dbSNicholas Bellinger /* 771c66ac9dbSNicholas Bellinger * Located a matching SCSI Initiator Port on a different 772c66ac9dbSNicholas Bellinger * port, allocate the pr_reg_atp and attach it to the 773c66ac9dbSNicholas Bellinger * pr_reg->pr_reg_atp_list that will be processed once 774c66ac9dbSNicholas Bellinger * the original *pr_reg is processed in 775c66ac9dbSNicholas Bellinger * __core_scsi3_add_registration() 776c66ac9dbSNicholas Bellinger */ 777c66ac9dbSNicholas Bellinger pr_reg_atp = __core_scsi3_do_alloc_registration(dev, 778c66ac9dbSNicholas Bellinger nacl_tmp, deve_tmp, NULL, 779c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl); 7806708bb27SAndy Grover if (!pr_reg_atp) { 781c66ac9dbSNicholas Bellinger atomic_dec(&port->sep_tg_pt_ref_cnt); 782c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 783c66ac9dbSNicholas Bellinger atomic_dec(&deve_tmp->pr_ref_count); 784c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 785c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(deve_tmp); 786c66ac9dbSNicholas Bellinger goto out; 787c66ac9dbSNicholas Bellinger } 788c66ac9dbSNicholas Bellinger 789c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg_atp->pr_reg_atp_mem_list, 790c66ac9dbSNicholas Bellinger &pr_reg->pr_reg_atp_list); 791c66ac9dbSNicholas Bellinger spin_lock_bh(&port->sep_alua_lock); 792c66ac9dbSNicholas Bellinger } 793c66ac9dbSNicholas Bellinger spin_unlock_bh(&port->sep_alua_lock); 794c66ac9dbSNicholas Bellinger 795c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 796c66ac9dbSNicholas Bellinger atomic_dec(&port->sep_tg_pt_ref_cnt); 797c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 798c66ac9dbSNicholas Bellinger } 799c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 800c66ac9dbSNicholas Bellinger 801c66ac9dbSNicholas Bellinger return pr_reg; 802c66ac9dbSNicholas Bellinger out: 803c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, 804c66ac9dbSNicholas Bellinger &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) { 805c66ac9dbSNicholas Bellinger list_del(&pr_reg_tmp->pr_reg_atp_mem_list); 806c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); 807c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp); 808c66ac9dbSNicholas Bellinger } 809c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 810c66ac9dbSNicholas Bellinger return NULL; 811c66ac9dbSNicholas Bellinger } 812c66ac9dbSNicholas Bellinger 813c66ac9dbSNicholas Bellinger int core_scsi3_alloc_aptpl_registration( 814e3d6f909SAndy Grover struct t10_reservation *pr_tmpl, 815c66ac9dbSNicholas Bellinger u64 sa_res_key, 816c66ac9dbSNicholas Bellinger unsigned char *i_port, 817c66ac9dbSNicholas Bellinger unsigned char *isid, 818c66ac9dbSNicholas Bellinger u32 mapped_lun, 819c66ac9dbSNicholas Bellinger unsigned char *t_port, 820c66ac9dbSNicholas Bellinger u16 tpgt, 821c66ac9dbSNicholas Bellinger u32 target_lun, 822c66ac9dbSNicholas Bellinger int res_holder, 823c66ac9dbSNicholas Bellinger int all_tg_pt, 824c66ac9dbSNicholas Bellinger u8 type) 825c66ac9dbSNicholas Bellinger { 826c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 827c66ac9dbSNicholas Bellinger 8286708bb27SAndy Grover if (!i_port || !t_port || !sa_res_key) { 8296708bb27SAndy Grover pr_err("Illegal parameters for APTPL registration\n"); 830e3d6f909SAndy Grover return -EINVAL; 831c66ac9dbSNicholas Bellinger } 832c66ac9dbSNicholas Bellinger 833c66ac9dbSNicholas Bellinger pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_KERNEL); 8346708bb27SAndy Grover if (!pr_reg) { 8356708bb27SAndy Grover pr_err("Unable to allocate struct t10_pr_registration\n"); 836e3d6f909SAndy Grover return -ENOMEM; 837c66ac9dbSNicholas Bellinger } 838c66ac9dbSNicholas Bellinger pr_reg->pr_aptpl_buf = kzalloc(pr_tmpl->pr_aptpl_buf_len, GFP_KERNEL); 839c66ac9dbSNicholas Bellinger 840c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_list); 841c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list); 842c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list); 843c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list); 844c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list); 845c66ac9dbSNicholas Bellinger atomic_set(&pr_reg->pr_res_holders, 0); 846c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = NULL; 847c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve = NULL; 848c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun = mapped_lun; 849c66ac9dbSNicholas Bellinger pr_reg->pr_aptpl_target_lun = target_lun; 850c66ac9dbSNicholas Bellinger pr_reg->pr_res_key = sa_res_key; 851c66ac9dbSNicholas Bellinger pr_reg->pr_reg_all_tg_pt = all_tg_pt; 852c66ac9dbSNicholas Bellinger pr_reg->pr_reg_aptpl = 1; 853c66ac9dbSNicholas Bellinger pr_reg->pr_reg_tg_pt_lun = NULL; 854c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope = 0; /* Always LUN_SCOPE */ 855c66ac9dbSNicholas Bellinger pr_reg->pr_res_type = type; 856c66ac9dbSNicholas Bellinger /* 857c66ac9dbSNicholas Bellinger * If an ISID value had been saved in APTPL metadata for this 858c66ac9dbSNicholas Bellinger * SCSI Initiator Port, restore it now. 859c66ac9dbSNicholas Bellinger */ 860c66ac9dbSNicholas Bellinger if (isid != NULL) { 861c66ac9dbSNicholas Bellinger pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid); 862c66ac9dbSNicholas Bellinger snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid); 863c66ac9dbSNicholas Bellinger pr_reg->isid_present_at_reg = 1; 864c66ac9dbSNicholas Bellinger } 865c66ac9dbSNicholas Bellinger /* 866c66ac9dbSNicholas Bellinger * Copy the i_port and t_port information from caller. 867c66ac9dbSNicholas Bellinger */ 868c66ac9dbSNicholas Bellinger snprintf(pr_reg->pr_iport, PR_APTPL_MAX_IPORT_LEN, "%s", i_port); 869c66ac9dbSNicholas Bellinger snprintf(pr_reg->pr_tport, PR_APTPL_MAX_TPORT_LEN, "%s", t_port); 870c66ac9dbSNicholas Bellinger pr_reg->pr_reg_tpgt = tpgt; 871c66ac9dbSNicholas Bellinger /* 872c66ac9dbSNicholas Bellinger * Set pr_res_holder from caller, the pr_reg who is the reservation 873c66ac9dbSNicholas Bellinger * holder will get it's pointer set in core_scsi3_aptpl_reserve() once 874c66ac9dbSNicholas Bellinger * the Initiator Node LUN ACL from the fabric module is created for 875c66ac9dbSNicholas Bellinger * this registration. 876c66ac9dbSNicholas Bellinger */ 877c66ac9dbSNicholas Bellinger pr_reg->pr_res_holder = res_holder; 878c66ac9dbSNicholas Bellinger 879c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg->pr_reg_aptpl_list, &pr_tmpl->aptpl_reg_list); 8806708bb27SAndy Grover pr_debug("SPC-3 PR APTPL Successfully added registration%s from" 881c66ac9dbSNicholas Bellinger " metadata\n", (res_holder) ? "+reservation" : ""); 882c66ac9dbSNicholas Bellinger return 0; 883c66ac9dbSNicholas Bellinger } 884c66ac9dbSNicholas Bellinger 885c66ac9dbSNicholas Bellinger static void core_scsi3_aptpl_reserve( 886c66ac9dbSNicholas Bellinger struct se_device *dev, 887c66ac9dbSNicholas Bellinger struct se_portal_group *tpg, 888c66ac9dbSNicholas Bellinger struct se_node_acl *node_acl, 889c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg) 890c66ac9dbSNicholas Bellinger { 891c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 892c66ac9dbSNicholas Bellinger int prf_isid; 893c66ac9dbSNicholas Bellinger 894c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 895c66ac9dbSNicholas Bellinger prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], 896c66ac9dbSNicholas Bellinger PR_REG_ISID_ID_LEN); 897c66ac9dbSNicholas Bellinger 898c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 899c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = pr_reg; 900c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 901c66ac9dbSNicholas Bellinger 9026708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: APTPL RESERVE created" 903c66ac9dbSNicholas Bellinger " new reservation holder TYPE: %s ALL_TG_PT: %d\n", 904e3d6f909SAndy Grover tpg->se_tpg_tfo->get_fabric_name(), 905c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg->pr_res_type), 906c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); 9076708bb27SAndy Grover pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n", 908e3d6f909SAndy Grover tpg->se_tpg_tfo->get_fabric_name(), node_acl->initiatorname, 909c66ac9dbSNicholas Bellinger (prf_isid) ? &i_buf[0] : ""); 910c66ac9dbSNicholas Bellinger } 911c66ac9dbSNicholas Bellinger 912c66ac9dbSNicholas Bellinger static void __core_scsi3_add_registration(struct se_device *, struct se_node_acl *, 913c66ac9dbSNicholas Bellinger struct t10_pr_registration *, int, int); 914c66ac9dbSNicholas Bellinger 915c66ac9dbSNicholas Bellinger static int __core_scsi3_check_aptpl_registration( 916c66ac9dbSNicholas Bellinger struct se_device *dev, 917c66ac9dbSNicholas Bellinger struct se_portal_group *tpg, 918c66ac9dbSNicholas Bellinger struct se_lun *lun, 919c66ac9dbSNicholas Bellinger u32 target_lun, 920c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 921c66ac9dbSNicholas Bellinger struct se_dev_entry *deve) 922c66ac9dbSNicholas Bellinger { 923c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp; 924e3d6f909SAndy Grover struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; 925c66ac9dbSNicholas Bellinger unsigned char i_port[PR_APTPL_MAX_IPORT_LEN]; 926c66ac9dbSNicholas Bellinger unsigned char t_port[PR_APTPL_MAX_TPORT_LEN]; 927c66ac9dbSNicholas Bellinger u16 tpgt; 928c66ac9dbSNicholas Bellinger 929c66ac9dbSNicholas Bellinger memset(i_port, 0, PR_APTPL_MAX_IPORT_LEN); 930c66ac9dbSNicholas Bellinger memset(t_port, 0, PR_APTPL_MAX_TPORT_LEN); 931c66ac9dbSNicholas Bellinger /* 932c66ac9dbSNicholas Bellinger * Copy Initiator Port information from struct se_node_acl 933c66ac9dbSNicholas Bellinger */ 934c66ac9dbSNicholas Bellinger snprintf(i_port, PR_APTPL_MAX_IPORT_LEN, "%s", nacl->initiatorname); 935c66ac9dbSNicholas Bellinger snprintf(t_port, PR_APTPL_MAX_TPORT_LEN, "%s", 936e3d6f909SAndy Grover tpg->se_tpg_tfo->tpg_get_wwn(tpg)); 937e3d6f909SAndy Grover tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); 938c66ac9dbSNicholas Bellinger /* 939c66ac9dbSNicholas Bellinger * Look for the matching registrations+reservation from those 940c66ac9dbSNicholas Bellinger * created from APTPL metadata. Note that multiple registrations 941c66ac9dbSNicholas Bellinger * may exist for fabrics that use ISIDs in their SCSI Initiator Port 942c66ac9dbSNicholas Bellinger * TransportIDs. 943c66ac9dbSNicholas Bellinger */ 944c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->aptpl_reg_lock); 945c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, 946c66ac9dbSNicholas Bellinger pr_reg_aptpl_list) { 9476708bb27SAndy Grover if (!strcmp(pr_reg->pr_iport, i_port) && 948c66ac9dbSNicholas Bellinger (pr_reg->pr_res_mapped_lun == deve->mapped_lun) && 949c66ac9dbSNicholas Bellinger !(strcmp(pr_reg->pr_tport, t_port)) && 950c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_tpgt == tpgt) && 951c66ac9dbSNicholas Bellinger (pr_reg->pr_aptpl_target_lun == target_lun)) { 952c66ac9dbSNicholas Bellinger 953c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = nacl; 954c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve = deve; 955c66ac9dbSNicholas Bellinger pr_reg->pr_reg_tg_pt_lun = lun; 956c66ac9dbSNicholas Bellinger 957c66ac9dbSNicholas Bellinger list_del(&pr_reg->pr_reg_aptpl_list); 958c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->aptpl_reg_lock); 959c66ac9dbSNicholas Bellinger /* 960c66ac9dbSNicholas Bellinger * At this point all of the pointers in *pr_reg will 961c66ac9dbSNicholas Bellinger * be setup, so go ahead and add the registration. 962c66ac9dbSNicholas Bellinger */ 963c66ac9dbSNicholas Bellinger 964c66ac9dbSNicholas Bellinger __core_scsi3_add_registration(dev, nacl, pr_reg, 0, 0); 965c66ac9dbSNicholas Bellinger /* 966c66ac9dbSNicholas Bellinger * If this registration is the reservation holder, 967c66ac9dbSNicholas Bellinger * make that happen now.. 968c66ac9dbSNicholas Bellinger */ 969c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_holder) 970c66ac9dbSNicholas Bellinger core_scsi3_aptpl_reserve(dev, tpg, 971c66ac9dbSNicholas Bellinger nacl, pr_reg); 972c66ac9dbSNicholas Bellinger /* 973c66ac9dbSNicholas Bellinger * Reenable pr_aptpl_active to accept new metadata 974c66ac9dbSNicholas Bellinger * updates once the SCSI device is active again.. 975c66ac9dbSNicholas Bellinger */ 976c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->aptpl_reg_lock); 977c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_active = 1; 978c66ac9dbSNicholas Bellinger } 979c66ac9dbSNicholas Bellinger } 980c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->aptpl_reg_lock); 981c66ac9dbSNicholas Bellinger 982c66ac9dbSNicholas Bellinger return 0; 983c66ac9dbSNicholas Bellinger } 984c66ac9dbSNicholas Bellinger 985c66ac9dbSNicholas Bellinger int core_scsi3_check_aptpl_registration( 986c66ac9dbSNicholas Bellinger struct se_device *dev, 987c66ac9dbSNicholas Bellinger struct se_portal_group *tpg, 988c66ac9dbSNicholas Bellinger struct se_lun *lun, 989c66ac9dbSNicholas Bellinger struct se_lun_acl *lun_acl) 990c66ac9dbSNicholas Bellinger { 991e3d6f909SAndy Grover struct se_subsystem_dev *su_dev = dev->se_sub_dev; 992c66ac9dbSNicholas Bellinger struct se_node_acl *nacl = lun_acl->se_lun_nacl; 993c66ac9dbSNicholas Bellinger struct se_dev_entry *deve = &nacl->device_list[lun_acl->mapped_lun]; 994c66ac9dbSNicholas Bellinger 995e3d6f909SAndy Grover if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) 996c66ac9dbSNicholas Bellinger return 0; 997c66ac9dbSNicholas Bellinger 998c66ac9dbSNicholas Bellinger return __core_scsi3_check_aptpl_registration(dev, tpg, lun, 999c66ac9dbSNicholas Bellinger lun->unpacked_lun, nacl, deve); 1000c66ac9dbSNicholas Bellinger } 1001c66ac9dbSNicholas Bellinger 1002c66ac9dbSNicholas Bellinger static void __core_scsi3_dump_registration( 1003c66ac9dbSNicholas Bellinger struct target_core_fabric_ops *tfo, 1004c66ac9dbSNicholas Bellinger struct se_device *dev, 1005c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 1006c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 1007c66ac9dbSNicholas Bellinger int register_type) 1008c66ac9dbSNicholas Bellinger { 1009c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg = nacl->se_tpg; 1010c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 1011c66ac9dbSNicholas Bellinger int prf_isid; 1012c66ac9dbSNicholas Bellinger 1013c66ac9dbSNicholas Bellinger memset(&i_buf[0], 0, PR_REG_ISID_ID_LEN); 1014c66ac9dbSNicholas Bellinger prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], 1015c66ac9dbSNicholas Bellinger PR_REG_ISID_ID_LEN); 1016c66ac9dbSNicholas Bellinger 10176708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: REGISTER%s Initiator" 1018c66ac9dbSNicholas Bellinger " Node: %s%s\n", tfo->get_fabric_name(), (register_type == 2) ? 1019c66ac9dbSNicholas Bellinger "_AND_MOVE" : (register_type == 1) ? 1020c66ac9dbSNicholas Bellinger "_AND_IGNORE_EXISTING_KEY" : "", nacl->initiatorname, 1021c66ac9dbSNicholas Bellinger (prf_isid) ? i_buf : ""); 10226708bb27SAndy Grover pr_debug("SPC-3 PR [%s] registration on Target Port: %s,0x%04x\n", 1023c66ac9dbSNicholas Bellinger tfo->get_fabric_name(), tfo->tpg_get_wwn(se_tpg), 1024c66ac9dbSNicholas Bellinger tfo->tpg_get_tag(se_tpg)); 10256708bb27SAndy Grover pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target" 1026c66ac9dbSNicholas Bellinger " Port(s)\n", tfo->get_fabric_name(), 1027c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE", 1028e3d6f909SAndy Grover dev->transport->name); 10296708bb27SAndy Grover pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:" 1030c66ac9dbSNicholas Bellinger " 0x%08x APTPL: %d\n", tfo->get_fabric_name(), 1031c66ac9dbSNicholas Bellinger pr_reg->pr_res_key, pr_reg->pr_res_generation, 1032c66ac9dbSNicholas Bellinger pr_reg->pr_reg_aptpl); 1033c66ac9dbSNicholas Bellinger } 1034c66ac9dbSNicholas Bellinger 1035c66ac9dbSNicholas Bellinger /* 1036c66ac9dbSNicholas Bellinger * this function can be called with struct se_device->dev_reservation_lock 1037c66ac9dbSNicholas Bellinger * when register_move = 1 1038c66ac9dbSNicholas Bellinger */ 1039c66ac9dbSNicholas Bellinger static void __core_scsi3_add_registration( 1040c66ac9dbSNicholas Bellinger struct se_device *dev, 1041c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 1042c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 1043c66ac9dbSNicholas Bellinger int register_type, 1044c66ac9dbSNicholas Bellinger int register_move) 1045c66ac9dbSNicholas Bellinger { 1046e3d6f909SAndy Grover struct se_subsystem_dev *su_dev = dev->se_sub_dev; 1047c66ac9dbSNicholas Bellinger struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; 1048c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe; 1049e3d6f909SAndy Grover struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; 1050c66ac9dbSNicholas Bellinger 1051c66ac9dbSNicholas Bellinger /* 1052c66ac9dbSNicholas Bellinger * Increment PRgeneration counter for struct se_device upon a successful 1053c66ac9dbSNicholas Bellinger * REGISTER, see spc4r17 section 6.3.2 READ_KEYS service action 1054c66ac9dbSNicholas Bellinger * 1055c66ac9dbSNicholas Bellinger * Also, when register_move = 1 for PROUT REGISTER_AND_MOVE service 1056c66ac9dbSNicholas Bellinger * action, the struct se_device->dev_reservation_lock will already be held, 1057c66ac9dbSNicholas Bellinger * so we do not call core_scsi3_pr_generation() which grabs the lock 1058c66ac9dbSNicholas Bellinger * for the REGISTER. 1059c66ac9dbSNicholas Bellinger */ 1060c66ac9dbSNicholas Bellinger pr_reg->pr_res_generation = (register_move) ? 1061e3d6f909SAndy Grover su_dev->t10_pr.pr_generation++ : 1062c66ac9dbSNicholas Bellinger core_scsi3_pr_generation(dev); 1063c66ac9dbSNicholas Bellinger 1064c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1065c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg->pr_reg_list, &pr_tmpl->registration_list); 1066c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve->def_pr_registered = 1; 1067c66ac9dbSNicholas Bellinger 1068c66ac9dbSNicholas Bellinger __core_scsi3_dump_registration(tfo, dev, nacl, pr_reg, register_type); 1069c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1070c66ac9dbSNicholas Bellinger /* 1071c66ac9dbSNicholas Bellinger * Skip extra processing for ALL_TG_PT=0 or REGISTER_AND_MOVE. 1072c66ac9dbSNicholas Bellinger */ 10736708bb27SAndy Grover if (!pr_reg->pr_reg_all_tg_pt || register_move) 1074c66ac9dbSNicholas Bellinger return; 1075c66ac9dbSNicholas Bellinger /* 1076c66ac9dbSNicholas Bellinger * Walk pr_reg->pr_reg_atp_list and add registrations for ALL_TG_PT=1 1077c66ac9dbSNicholas Bellinger * allocated in __core_scsi3_alloc_registration() 1078c66ac9dbSNicholas Bellinger */ 1079c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, 1080c66ac9dbSNicholas Bellinger &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) { 1081c66ac9dbSNicholas Bellinger list_del(&pr_reg_tmp->pr_reg_atp_mem_list); 1082c66ac9dbSNicholas Bellinger 1083c66ac9dbSNicholas Bellinger pr_reg_tmp->pr_res_generation = core_scsi3_pr_generation(dev); 1084c66ac9dbSNicholas Bellinger 1085c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1086c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg_tmp->pr_reg_list, 1087c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list); 1088c66ac9dbSNicholas Bellinger pr_reg_tmp->pr_reg_deve->def_pr_registered = 1; 1089c66ac9dbSNicholas Bellinger 1090c66ac9dbSNicholas Bellinger __core_scsi3_dump_registration(tfo, dev, 1091c66ac9dbSNicholas Bellinger pr_reg_tmp->pr_reg_nacl, pr_reg_tmp, 1092c66ac9dbSNicholas Bellinger register_type); 1093c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1094c66ac9dbSNicholas Bellinger /* 1095c66ac9dbSNicholas Bellinger * Drop configfs group dependency reference from 1096c66ac9dbSNicholas Bellinger * __core_scsi3_alloc_registration() 1097c66ac9dbSNicholas Bellinger */ 1098c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); 1099c66ac9dbSNicholas Bellinger } 1100c66ac9dbSNicholas Bellinger } 1101c66ac9dbSNicholas Bellinger 1102c66ac9dbSNicholas Bellinger static int core_scsi3_alloc_registration( 1103c66ac9dbSNicholas Bellinger struct se_device *dev, 1104c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 1105c66ac9dbSNicholas Bellinger struct se_dev_entry *deve, 1106c66ac9dbSNicholas Bellinger unsigned char *isid, 1107c66ac9dbSNicholas Bellinger u64 sa_res_key, 1108c66ac9dbSNicholas Bellinger int all_tg_pt, 1109c66ac9dbSNicholas Bellinger int aptpl, 1110c66ac9dbSNicholas Bellinger int register_type, 1111c66ac9dbSNicholas Bellinger int register_move) 1112c66ac9dbSNicholas Bellinger { 1113c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 1114c66ac9dbSNicholas Bellinger 1115c66ac9dbSNicholas Bellinger pr_reg = __core_scsi3_alloc_registration(dev, nacl, deve, isid, 1116c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl); 11176708bb27SAndy Grover if (!pr_reg) 1118e3d6f909SAndy Grover return -EPERM; 1119c66ac9dbSNicholas Bellinger 1120c66ac9dbSNicholas Bellinger __core_scsi3_add_registration(dev, nacl, pr_reg, 1121c66ac9dbSNicholas Bellinger register_type, register_move); 1122c66ac9dbSNicholas Bellinger return 0; 1123c66ac9dbSNicholas Bellinger } 1124c66ac9dbSNicholas Bellinger 1125c66ac9dbSNicholas Bellinger static struct t10_pr_registration *__core_scsi3_locate_pr_reg( 1126c66ac9dbSNicholas Bellinger struct se_device *dev, 1127c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 1128c66ac9dbSNicholas Bellinger unsigned char *isid) 1129c66ac9dbSNicholas Bellinger { 1130e3d6f909SAndy Grover struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; 1131c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp; 1132c66ac9dbSNicholas Bellinger struct se_portal_group *tpg; 1133c66ac9dbSNicholas Bellinger 1134c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1135c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 1136c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 1137c66ac9dbSNicholas Bellinger /* 1138c66ac9dbSNicholas Bellinger * First look for a matching struct se_node_acl 1139c66ac9dbSNicholas Bellinger */ 1140c66ac9dbSNicholas Bellinger if (pr_reg->pr_reg_nacl != nacl) 1141c66ac9dbSNicholas Bellinger continue; 1142c66ac9dbSNicholas Bellinger 1143c66ac9dbSNicholas Bellinger tpg = pr_reg->pr_reg_nacl->se_tpg; 1144c66ac9dbSNicholas Bellinger /* 1145c66ac9dbSNicholas Bellinger * If this registration does NOT contain a fabric provided 1146c66ac9dbSNicholas Bellinger * ISID, then we have found a match. 1147c66ac9dbSNicholas Bellinger */ 11486708bb27SAndy Grover if (!pr_reg->isid_present_at_reg) { 1149c66ac9dbSNicholas Bellinger /* 1150c66ac9dbSNicholas Bellinger * Determine if this SCSI device server requires that 1151c66ac9dbSNicholas Bellinger * SCSI Intiatior TransportID w/ ISIDs is enforced 1152c66ac9dbSNicholas Bellinger * for fabric modules (iSCSI) requiring them. 1153c66ac9dbSNicholas Bellinger */ 1154e3d6f909SAndy Grover if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { 1155e3d6f909SAndy Grover if (dev->se_sub_dev->se_dev_attrib.enforce_pr_isids) 1156c66ac9dbSNicholas Bellinger continue; 1157c66ac9dbSNicholas Bellinger } 1158c66ac9dbSNicholas Bellinger atomic_inc(&pr_reg->pr_res_holders); 1159c66ac9dbSNicholas Bellinger smp_mb__after_atomic_inc(); 1160c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1161c66ac9dbSNicholas Bellinger return pr_reg; 1162c66ac9dbSNicholas Bellinger } 1163c66ac9dbSNicholas Bellinger /* 1164c66ac9dbSNicholas Bellinger * If the *pr_reg contains a fabric defined ISID for multi-value 1165c66ac9dbSNicholas Bellinger * SCSI Initiator Port TransportIDs, then we expect a valid 1166c66ac9dbSNicholas Bellinger * matching ISID to be provided by the local SCSI Initiator Port. 1167c66ac9dbSNicholas Bellinger */ 11686708bb27SAndy Grover if (!isid) 1169c66ac9dbSNicholas Bellinger continue; 1170c66ac9dbSNicholas Bellinger if (strcmp(isid, pr_reg->pr_reg_isid)) 1171c66ac9dbSNicholas Bellinger continue; 1172c66ac9dbSNicholas Bellinger 1173c66ac9dbSNicholas Bellinger atomic_inc(&pr_reg->pr_res_holders); 1174c66ac9dbSNicholas Bellinger smp_mb__after_atomic_inc(); 1175c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1176c66ac9dbSNicholas Bellinger return pr_reg; 1177c66ac9dbSNicholas Bellinger } 1178c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1179c66ac9dbSNicholas Bellinger 1180c66ac9dbSNicholas Bellinger return NULL; 1181c66ac9dbSNicholas Bellinger } 1182c66ac9dbSNicholas Bellinger 1183c66ac9dbSNicholas Bellinger static struct t10_pr_registration *core_scsi3_locate_pr_reg( 1184c66ac9dbSNicholas Bellinger struct se_device *dev, 1185c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 1186c66ac9dbSNicholas Bellinger struct se_session *sess) 1187c66ac9dbSNicholas Bellinger { 1188c66ac9dbSNicholas Bellinger struct se_portal_group *tpg = nacl->se_tpg; 1189c66ac9dbSNicholas Bellinger unsigned char buf[PR_REG_ISID_LEN], *isid_ptr = NULL; 1190c66ac9dbSNicholas Bellinger 1191e3d6f909SAndy Grover if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { 1192c66ac9dbSNicholas Bellinger memset(&buf[0], 0, PR_REG_ISID_LEN); 1193e3d6f909SAndy Grover tpg->se_tpg_tfo->sess_get_initiator_sid(sess, &buf[0], 1194c66ac9dbSNicholas Bellinger PR_REG_ISID_LEN); 1195c66ac9dbSNicholas Bellinger isid_ptr = &buf[0]; 1196c66ac9dbSNicholas Bellinger } 1197c66ac9dbSNicholas Bellinger 1198c66ac9dbSNicholas Bellinger return __core_scsi3_locate_pr_reg(dev, nacl, isid_ptr); 1199c66ac9dbSNicholas Bellinger } 1200c66ac9dbSNicholas Bellinger 1201c66ac9dbSNicholas Bellinger static void core_scsi3_put_pr_reg(struct t10_pr_registration *pr_reg) 1202c66ac9dbSNicholas Bellinger { 1203c66ac9dbSNicholas Bellinger atomic_dec(&pr_reg->pr_res_holders); 1204c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 1205c66ac9dbSNicholas Bellinger } 1206c66ac9dbSNicholas Bellinger 1207c66ac9dbSNicholas Bellinger static int core_scsi3_check_implict_release( 1208c66ac9dbSNicholas Bellinger struct se_device *dev, 1209c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg) 1210c66ac9dbSNicholas Bellinger { 1211c66ac9dbSNicholas Bellinger struct se_node_acl *nacl = pr_reg->pr_reg_nacl; 1212c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_res_holder; 1213c66ac9dbSNicholas Bellinger int ret = 0; 1214c66ac9dbSNicholas Bellinger 1215c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 1216c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 12176708bb27SAndy Grover if (!pr_res_holder) { 1218c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1219c66ac9dbSNicholas Bellinger return ret; 1220c66ac9dbSNicholas Bellinger } 1221c66ac9dbSNicholas Bellinger if (pr_res_holder == pr_reg) { 1222c66ac9dbSNicholas Bellinger /* 1223c66ac9dbSNicholas Bellinger * Perform an implict RELEASE if the registration that 1224c66ac9dbSNicholas Bellinger * is being released is holding the reservation. 1225c66ac9dbSNicholas Bellinger * 1226c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.11.1: 1227c66ac9dbSNicholas Bellinger * 1228c66ac9dbSNicholas Bellinger * e) If the I_T nexus is the persistent reservation holder 1229c66ac9dbSNicholas Bellinger * and the persistent reservation is not an all registrants 1230c66ac9dbSNicholas Bellinger * type, then a PERSISTENT RESERVE OUT command with REGISTER 1231c66ac9dbSNicholas Bellinger * service action or REGISTER AND IGNORE EXISTING KEY 1232c66ac9dbSNicholas Bellinger * service action with the SERVICE ACTION RESERVATION KEY 1233c66ac9dbSNicholas Bellinger * field set to zero (see 5.7.11.3). 1234c66ac9dbSNicholas Bellinger */ 1235c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, nacl, pr_reg, 0); 1236c66ac9dbSNicholas Bellinger ret = 1; 1237c66ac9dbSNicholas Bellinger /* 1238c66ac9dbSNicholas Bellinger * For 'All Registrants' reservation types, all existing 1239c66ac9dbSNicholas Bellinger * registrations are still processed as reservation holders 1240c66ac9dbSNicholas Bellinger * in core_scsi3_pr_seq_non_holder() after the initial 1241c66ac9dbSNicholas Bellinger * reservation holder is implictly released here. 1242c66ac9dbSNicholas Bellinger */ 1243c66ac9dbSNicholas Bellinger } else if (pr_reg->pr_reg_all_tg_pt && 1244c66ac9dbSNicholas Bellinger (!strcmp(pr_res_holder->pr_reg_nacl->initiatorname, 1245c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->initiatorname)) && 1246c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_key == pr_reg->pr_res_key)) { 12476708bb27SAndy Grover pr_err("SPC-3 PR: Unable to perform ALL_TG_PT=1" 1248c66ac9dbSNicholas Bellinger " UNREGISTER while existing reservation with matching" 1249c66ac9dbSNicholas Bellinger " key 0x%016Lx is present from another SCSI Initiator" 1250c66ac9dbSNicholas Bellinger " Port\n", pr_reg->pr_res_key); 1251e3d6f909SAndy Grover ret = -EPERM; 1252c66ac9dbSNicholas Bellinger } 1253c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1254c66ac9dbSNicholas Bellinger 1255c66ac9dbSNicholas Bellinger return ret; 1256c66ac9dbSNicholas Bellinger } 1257c66ac9dbSNicholas Bellinger 1258c66ac9dbSNicholas Bellinger /* 1259e3d6f909SAndy Grover * Called with struct t10_reservation->registration_lock held. 1260c66ac9dbSNicholas Bellinger */ 1261c66ac9dbSNicholas Bellinger static void __core_scsi3_free_registration( 1262c66ac9dbSNicholas Bellinger struct se_device *dev, 1263c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 1264c66ac9dbSNicholas Bellinger struct list_head *preempt_and_abort_list, 1265c66ac9dbSNicholas Bellinger int dec_holders) 1266c66ac9dbSNicholas Bellinger { 1267c66ac9dbSNicholas Bellinger struct target_core_fabric_ops *tfo = 1268c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 1269e3d6f909SAndy Grover struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; 1270c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 1271c66ac9dbSNicholas Bellinger int prf_isid; 1272c66ac9dbSNicholas Bellinger 1273c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1274c66ac9dbSNicholas Bellinger prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], 1275c66ac9dbSNicholas Bellinger PR_REG_ISID_ID_LEN); 1276c66ac9dbSNicholas Bellinger 1277c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve->def_pr_registered = 0; 1278c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve->pr_res_key = 0; 1279c66ac9dbSNicholas Bellinger list_del(&pr_reg->pr_reg_list); 1280c66ac9dbSNicholas Bellinger /* 1281c66ac9dbSNicholas Bellinger * Caller accessing *pr_reg using core_scsi3_locate_pr_reg(), 1282c66ac9dbSNicholas Bellinger * so call core_scsi3_put_pr_reg() to decrement our reference. 1283c66ac9dbSNicholas Bellinger */ 1284c66ac9dbSNicholas Bellinger if (dec_holders) 1285c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 1286c66ac9dbSNicholas Bellinger /* 1287c66ac9dbSNicholas Bellinger * Wait until all reference from any other I_T nexuses for this 1288c66ac9dbSNicholas Bellinger * *pr_reg have been released. Because list_del() is called above, 1289c66ac9dbSNicholas Bellinger * the last core_scsi3_put_pr_reg(pr_reg) will release this reference 1290c66ac9dbSNicholas Bellinger * count back to zero, and we release *pr_reg. 1291c66ac9dbSNicholas Bellinger */ 1292c66ac9dbSNicholas Bellinger while (atomic_read(&pr_reg->pr_res_holders) != 0) { 1293c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 12946708bb27SAndy Grover pr_debug("SPC-3 PR [%s] waiting for pr_res_holders\n", 1295c66ac9dbSNicholas Bellinger tfo->get_fabric_name()); 1296c66ac9dbSNicholas Bellinger cpu_relax(); 1297c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1298c66ac9dbSNicholas Bellinger } 1299c66ac9dbSNicholas Bellinger 13006708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: UNREGISTER Initiator" 1301c66ac9dbSNicholas Bellinger " Node: %s%s\n", tfo->get_fabric_name(), 1302c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->initiatorname, 1303c66ac9dbSNicholas Bellinger (prf_isid) ? &i_buf[0] : ""); 13046708bb27SAndy Grover pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target" 1305c66ac9dbSNicholas Bellinger " Port(s)\n", tfo->get_fabric_name(), 1306c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE", 1307e3d6f909SAndy Grover dev->transport->name); 13086708bb27SAndy Grover pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:" 1309c66ac9dbSNicholas Bellinger " 0x%08x\n", tfo->get_fabric_name(), pr_reg->pr_res_key, 1310c66ac9dbSNicholas Bellinger pr_reg->pr_res_generation); 1311c66ac9dbSNicholas Bellinger 13126708bb27SAndy Grover if (!preempt_and_abort_list) { 1313c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve = NULL; 1314c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = NULL; 1315c66ac9dbSNicholas Bellinger kfree(pr_reg->pr_aptpl_buf); 1316c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 1317c66ac9dbSNicholas Bellinger return; 1318c66ac9dbSNicholas Bellinger } 1319c66ac9dbSNicholas Bellinger /* 1320c66ac9dbSNicholas Bellinger * For PREEMPT_AND_ABORT, the list of *pr_reg in preempt_and_abort_list 1321c66ac9dbSNicholas Bellinger * are released once the ABORT_TASK_SET has completed.. 1322c66ac9dbSNicholas Bellinger */ 1323c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg->pr_reg_abort_list, preempt_and_abort_list); 1324c66ac9dbSNicholas Bellinger } 1325c66ac9dbSNicholas Bellinger 1326c66ac9dbSNicholas Bellinger void core_scsi3_free_pr_reg_from_nacl( 1327c66ac9dbSNicholas Bellinger struct se_device *dev, 1328c66ac9dbSNicholas Bellinger struct se_node_acl *nacl) 1329c66ac9dbSNicholas Bellinger { 1330e3d6f909SAndy Grover struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; 1331c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder; 1332c66ac9dbSNicholas Bellinger /* 1333c66ac9dbSNicholas Bellinger * If the passed se_node_acl matches the reservation holder, 1334c66ac9dbSNicholas Bellinger * release the reservation. 1335c66ac9dbSNicholas Bellinger */ 1336c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 1337c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 1338c66ac9dbSNicholas Bellinger if ((pr_res_holder != NULL) && 1339c66ac9dbSNicholas Bellinger (pr_res_holder->pr_reg_nacl == nacl)) 1340c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, nacl, pr_res_holder, 0); 1341c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1342c66ac9dbSNicholas Bellinger /* 1343c66ac9dbSNicholas Bellinger * Release any registration associated with the struct se_node_acl. 1344c66ac9dbSNicholas Bellinger */ 1345c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1346c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 1347c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 1348c66ac9dbSNicholas Bellinger 1349c66ac9dbSNicholas Bellinger if (pr_reg->pr_reg_nacl != nacl) 1350c66ac9dbSNicholas Bellinger continue; 1351c66ac9dbSNicholas Bellinger 1352c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, NULL, 0); 1353c66ac9dbSNicholas Bellinger } 1354c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1355c66ac9dbSNicholas Bellinger } 1356c66ac9dbSNicholas Bellinger 1357c66ac9dbSNicholas Bellinger void core_scsi3_free_all_registrations( 1358c66ac9dbSNicholas Bellinger struct se_device *dev) 1359c66ac9dbSNicholas Bellinger { 1360e3d6f909SAndy Grover struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; 1361c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder; 1362c66ac9dbSNicholas Bellinger 1363c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 1364c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 1365c66ac9dbSNicholas Bellinger if (pr_res_holder != NULL) { 1366c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 1367c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, pr_res_nacl, 1368c66ac9dbSNicholas Bellinger pr_res_holder, 0); 1369c66ac9dbSNicholas Bellinger } 1370c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1371c66ac9dbSNicholas Bellinger 1372c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1373c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 1374c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 1375c66ac9dbSNicholas Bellinger 1376c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, NULL, 0); 1377c66ac9dbSNicholas Bellinger } 1378c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1379c66ac9dbSNicholas Bellinger 1380c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->aptpl_reg_lock); 1381c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, 1382c66ac9dbSNicholas Bellinger pr_reg_aptpl_list) { 1383c66ac9dbSNicholas Bellinger list_del(&pr_reg->pr_reg_aptpl_list); 1384c66ac9dbSNicholas Bellinger kfree(pr_reg->pr_aptpl_buf); 1385c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 1386c66ac9dbSNicholas Bellinger } 1387c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->aptpl_reg_lock); 1388c66ac9dbSNicholas Bellinger } 1389c66ac9dbSNicholas Bellinger 1390c66ac9dbSNicholas Bellinger static int core_scsi3_tpg_depend_item(struct se_portal_group *tpg) 1391c66ac9dbSNicholas Bellinger { 1392e3d6f909SAndy Grover return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys, 1393c66ac9dbSNicholas Bellinger &tpg->tpg_group.cg_item); 1394c66ac9dbSNicholas Bellinger } 1395c66ac9dbSNicholas Bellinger 1396c66ac9dbSNicholas Bellinger static void core_scsi3_tpg_undepend_item(struct se_portal_group *tpg) 1397c66ac9dbSNicholas Bellinger { 1398e3d6f909SAndy Grover configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys, 1399c66ac9dbSNicholas Bellinger &tpg->tpg_group.cg_item); 1400c66ac9dbSNicholas Bellinger 1401c66ac9dbSNicholas Bellinger atomic_dec(&tpg->tpg_pr_ref_count); 1402c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 1403c66ac9dbSNicholas Bellinger } 1404c66ac9dbSNicholas Bellinger 1405c66ac9dbSNicholas Bellinger static int core_scsi3_nodeacl_depend_item(struct se_node_acl *nacl) 1406c66ac9dbSNicholas Bellinger { 1407c66ac9dbSNicholas Bellinger struct se_portal_group *tpg = nacl->se_tpg; 1408c66ac9dbSNicholas Bellinger 1409c66ac9dbSNicholas Bellinger if (nacl->dynamic_node_acl) 1410c66ac9dbSNicholas Bellinger return 0; 1411c66ac9dbSNicholas Bellinger 1412e3d6f909SAndy Grover return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys, 1413c66ac9dbSNicholas Bellinger &nacl->acl_group.cg_item); 1414c66ac9dbSNicholas Bellinger } 1415c66ac9dbSNicholas Bellinger 1416c66ac9dbSNicholas Bellinger static void core_scsi3_nodeacl_undepend_item(struct se_node_acl *nacl) 1417c66ac9dbSNicholas Bellinger { 1418c66ac9dbSNicholas Bellinger struct se_portal_group *tpg = nacl->se_tpg; 1419c66ac9dbSNicholas Bellinger 1420c66ac9dbSNicholas Bellinger if (nacl->dynamic_node_acl) { 1421c66ac9dbSNicholas Bellinger atomic_dec(&nacl->acl_pr_ref_count); 1422c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 1423c66ac9dbSNicholas Bellinger return; 1424c66ac9dbSNicholas Bellinger } 1425c66ac9dbSNicholas Bellinger 1426e3d6f909SAndy Grover configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys, 1427c66ac9dbSNicholas Bellinger &nacl->acl_group.cg_item); 1428c66ac9dbSNicholas Bellinger 1429c66ac9dbSNicholas Bellinger atomic_dec(&nacl->acl_pr_ref_count); 1430c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 1431c66ac9dbSNicholas Bellinger } 1432c66ac9dbSNicholas Bellinger 1433c66ac9dbSNicholas Bellinger static int core_scsi3_lunacl_depend_item(struct se_dev_entry *se_deve) 1434c66ac9dbSNicholas Bellinger { 1435c66ac9dbSNicholas Bellinger struct se_lun_acl *lun_acl = se_deve->se_lun_acl; 1436c66ac9dbSNicholas Bellinger struct se_node_acl *nacl; 1437c66ac9dbSNicholas Bellinger struct se_portal_group *tpg; 1438c66ac9dbSNicholas Bellinger /* 1439c66ac9dbSNicholas Bellinger * For nacl->dynamic_node_acl=1 1440c66ac9dbSNicholas Bellinger */ 14416708bb27SAndy Grover if (!lun_acl) 1442c66ac9dbSNicholas Bellinger return 0; 1443c66ac9dbSNicholas Bellinger 1444c66ac9dbSNicholas Bellinger nacl = lun_acl->se_lun_nacl; 1445c66ac9dbSNicholas Bellinger tpg = nacl->se_tpg; 1446c66ac9dbSNicholas Bellinger 1447e3d6f909SAndy Grover return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys, 1448c66ac9dbSNicholas Bellinger &lun_acl->se_lun_group.cg_item); 1449c66ac9dbSNicholas Bellinger } 1450c66ac9dbSNicholas Bellinger 1451c66ac9dbSNicholas Bellinger static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *se_deve) 1452c66ac9dbSNicholas Bellinger { 1453c66ac9dbSNicholas Bellinger struct se_lun_acl *lun_acl = se_deve->se_lun_acl; 1454c66ac9dbSNicholas Bellinger struct se_node_acl *nacl; 1455c66ac9dbSNicholas Bellinger struct se_portal_group *tpg; 1456c66ac9dbSNicholas Bellinger /* 1457c66ac9dbSNicholas Bellinger * For nacl->dynamic_node_acl=1 1458c66ac9dbSNicholas Bellinger */ 14596708bb27SAndy Grover if (!lun_acl) { 1460c66ac9dbSNicholas Bellinger atomic_dec(&se_deve->pr_ref_count); 1461c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 1462c66ac9dbSNicholas Bellinger return; 1463c66ac9dbSNicholas Bellinger } 1464c66ac9dbSNicholas Bellinger nacl = lun_acl->se_lun_nacl; 1465c66ac9dbSNicholas Bellinger tpg = nacl->se_tpg; 1466c66ac9dbSNicholas Bellinger 1467e3d6f909SAndy Grover configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys, 1468c66ac9dbSNicholas Bellinger &lun_acl->se_lun_group.cg_item); 1469c66ac9dbSNicholas Bellinger 1470c66ac9dbSNicholas Bellinger atomic_dec(&se_deve->pr_ref_count); 1471c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 1472c66ac9dbSNicholas Bellinger } 1473c66ac9dbSNicholas Bellinger 1474c66ac9dbSNicholas Bellinger static int core_scsi3_decode_spec_i_port( 1475c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 1476c66ac9dbSNicholas Bellinger struct se_portal_group *tpg, 1477c66ac9dbSNicholas Bellinger unsigned char *l_isid, 1478c66ac9dbSNicholas Bellinger u64 sa_res_key, 1479c66ac9dbSNicholas Bellinger int all_tg_pt, 1480c66ac9dbSNicholas Bellinger int aptpl) 1481c66ac9dbSNicholas Bellinger { 14825951146dSAndy Grover struct se_device *dev = cmd->se_dev; 1483c66ac9dbSNicholas Bellinger struct se_port *tmp_port; 1484c66ac9dbSNicholas Bellinger struct se_portal_group *dest_tpg = NULL, *tmp_tpg; 1485e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 1486c66ac9dbSNicholas Bellinger struct se_node_acl *dest_node_acl = NULL; 1487c66ac9dbSNicholas Bellinger struct se_dev_entry *dest_se_deve = NULL, *local_se_deve; 1488c66ac9dbSNicholas Bellinger struct t10_pr_registration *dest_pr_reg, *local_pr_reg, *pr_reg_e; 1489c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe; 1490c66ac9dbSNicholas Bellinger struct list_head tid_dest_list; 1491c66ac9dbSNicholas Bellinger struct pr_transport_id_holder *tidh_new, *tidh, *tidh_tmp; 1492c66ac9dbSNicholas Bellinger struct target_core_fabric_ops *tmp_tf_ops; 149305d1c7c0SAndy Grover unsigned char *buf; 1494c66ac9dbSNicholas Bellinger unsigned char *ptr, *i_str = NULL, proto_ident, tmp_proto_ident; 1495c66ac9dbSNicholas Bellinger char *iport_ptr = NULL, dest_iport[64], i_buf[PR_REG_ISID_ID_LEN]; 1496c66ac9dbSNicholas Bellinger u32 tpdl, tid_len = 0; 1497c66ac9dbSNicholas Bellinger int ret, dest_local_nexus, prf_isid; 1498c66ac9dbSNicholas Bellinger u32 dest_rtpi = 0; 1499c66ac9dbSNicholas Bellinger 1500c66ac9dbSNicholas Bellinger memset(dest_iport, 0, 64); 1501c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&tid_dest_list); 1502c66ac9dbSNicholas Bellinger 1503c66ac9dbSNicholas Bellinger local_se_deve = &se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; 1504c66ac9dbSNicholas Bellinger /* 1505c66ac9dbSNicholas Bellinger * Allocate a struct pr_transport_id_holder and setup the 1506c66ac9dbSNicholas Bellinger * local_node_acl and local_se_deve pointers and add to 1507c66ac9dbSNicholas Bellinger * struct list_head tid_dest_list for add registration 1508c66ac9dbSNicholas Bellinger * processing in the loop of tid_dest_list below. 1509c66ac9dbSNicholas Bellinger */ 1510c66ac9dbSNicholas Bellinger tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), GFP_KERNEL); 15116708bb27SAndy Grover if (!tidh_new) { 15126708bb27SAndy Grover pr_err("Unable to allocate tidh_new\n"); 151303e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 151403e98c9eSNicholas Bellinger return -EINVAL; 1515c66ac9dbSNicholas Bellinger } 1516c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&tidh_new->dest_list); 1517c66ac9dbSNicholas Bellinger tidh_new->dest_tpg = tpg; 1518c66ac9dbSNicholas Bellinger tidh_new->dest_node_acl = se_sess->se_node_acl; 1519c66ac9dbSNicholas Bellinger tidh_new->dest_se_deve = local_se_deve; 1520c66ac9dbSNicholas Bellinger 15215951146dSAndy Grover local_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev, 1522c66ac9dbSNicholas Bellinger se_sess->se_node_acl, local_se_deve, l_isid, 1523c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl); 15246708bb27SAndy Grover if (!local_pr_reg) { 1525c66ac9dbSNicholas Bellinger kfree(tidh_new); 152603e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 152703e98c9eSNicholas Bellinger return -ENOMEM; 1528c66ac9dbSNicholas Bellinger } 1529c66ac9dbSNicholas Bellinger tidh_new->dest_pr_reg = local_pr_reg; 1530c66ac9dbSNicholas Bellinger /* 1531c66ac9dbSNicholas Bellinger * The local I_T nexus does not hold any configfs dependances, 1532c66ac9dbSNicholas Bellinger * so we set tid_h->dest_local_nexus=1 to prevent the 1533c66ac9dbSNicholas Bellinger * configfs_undepend_item() calls in the tid_dest_list loops below. 1534c66ac9dbSNicholas Bellinger */ 1535c66ac9dbSNicholas Bellinger tidh_new->dest_local_nexus = 1; 1536c66ac9dbSNicholas Bellinger list_add_tail(&tidh_new->dest_list, &tid_dest_list); 153705d1c7c0SAndy Grover 15384949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 1539c66ac9dbSNicholas Bellinger /* 1540c66ac9dbSNicholas Bellinger * For a PERSISTENT RESERVE OUT specify initiator ports payload, 1541c66ac9dbSNicholas Bellinger * first extract TransportID Parameter Data Length, and make sure 1542c66ac9dbSNicholas Bellinger * the value matches up to the SCSI expected data transfer length. 1543c66ac9dbSNicholas Bellinger */ 1544c66ac9dbSNicholas Bellinger tpdl = (buf[24] & 0xff) << 24; 1545c66ac9dbSNicholas Bellinger tpdl |= (buf[25] & 0xff) << 16; 1546c66ac9dbSNicholas Bellinger tpdl |= (buf[26] & 0xff) << 8; 1547c66ac9dbSNicholas Bellinger tpdl |= buf[27] & 0xff; 1548c66ac9dbSNicholas Bellinger 1549c66ac9dbSNicholas Bellinger if ((tpdl + 28) != cmd->data_length) { 15506708bb27SAndy Grover pr_err("SPC-3 PR: Illegal tpdl: %u + 28 byte header" 1551c66ac9dbSNicholas Bellinger " does not equal CDB data_length: %u\n", tpdl, 1552c66ac9dbSNicholas Bellinger cmd->data_length); 155303e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 155403e98c9eSNicholas Bellinger ret = -EINVAL; 1555c66ac9dbSNicholas Bellinger goto out; 1556c66ac9dbSNicholas Bellinger } 1557c66ac9dbSNicholas Bellinger /* 1558c66ac9dbSNicholas Bellinger * Start processing the received transport IDs using the 1559c66ac9dbSNicholas Bellinger * receiving I_T Nexus portal's fabric dependent methods to 1560c66ac9dbSNicholas Bellinger * obtain the SCSI Initiator Port/Device Identifiers. 1561c66ac9dbSNicholas Bellinger */ 1562c66ac9dbSNicholas Bellinger ptr = &buf[28]; 1563c66ac9dbSNicholas Bellinger 1564c66ac9dbSNicholas Bellinger while (tpdl > 0) { 1565c66ac9dbSNicholas Bellinger proto_ident = (ptr[0] & 0x0f); 1566c66ac9dbSNicholas Bellinger dest_tpg = NULL; 1567c66ac9dbSNicholas Bellinger 1568c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 1569c66ac9dbSNicholas Bellinger list_for_each_entry(tmp_port, &dev->dev_sep_list, sep_list) { 1570c66ac9dbSNicholas Bellinger tmp_tpg = tmp_port->sep_tpg; 15716708bb27SAndy Grover if (!tmp_tpg) 1572c66ac9dbSNicholas Bellinger continue; 1573e3d6f909SAndy Grover tmp_tf_ops = tmp_tpg->se_tpg_tfo; 15746708bb27SAndy Grover if (!tmp_tf_ops) 1575c66ac9dbSNicholas Bellinger continue; 15766708bb27SAndy Grover if (!tmp_tf_ops->get_fabric_proto_ident || 15776708bb27SAndy Grover !tmp_tf_ops->tpg_parse_pr_out_transport_id) 1578c66ac9dbSNicholas Bellinger continue; 1579c66ac9dbSNicholas Bellinger /* 1580c66ac9dbSNicholas Bellinger * Look for the matching proto_ident provided by 1581c66ac9dbSNicholas Bellinger * the received TransportID 1582c66ac9dbSNicholas Bellinger */ 1583c66ac9dbSNicholas Bellinger tmp_proto_ident = tmp_tf_ops->get_fabric_proto_ident(tmp_tpg); 1584c66ac9dbSNicholas Bellinger if (tmp_proto_ident != proto_ident) 1585c66ac9dbSNicholas Bellinger continue; 1586c66ac9dbSNicholas Bellinger dest_rtpi = tmp_port->sep_rtpi; 1587c66ac9dbSNicholas Bellinger 1588c66ac9dbSNicholas Bellinger i_str = tmp_tf_ops->tpg_parse_pr_out_transport_id( 1589c66ac9dbSNicholas Bellinger tmp_tpg, (const char *)ptr, &tid_len, 1590c66ac9dbSNicholas Bellinger &iport_ptr); 15916708bb27SAndy Grover if (!i_str) 1592c66ac9dbSNicholas Bellinger continue; 1593c66ac9dbSNicholas Bellinger 1594c66ac9dbSNicholas Bellinger atomic_inc(&tmp_tpg->tpg_pr_ref_count); 1595c66ac9dbSNicholas Bellinger smp_mb__after_atomic_inc(); 1596c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 1597c66ac9dbSNicholas Bellinger 1598c66ac9dbSNicholas Bellinger ret = core_scsi3_tpg_depend_item(tmp_tpg); 1599c66ac9dbSNicholas Bellinger if (ret != 0) { 16006708bb27SAndy Grover pr_err(" core_scsi3_tpg_depend_item()" 1601c66ac9dbSNicholas Bellinger " for tmp_tpg\n"); 1602c66ac9dbSNicholas Bellinger atomic_dec(&tmp_tpg->tpg_pr_ref_count); 1603c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 160403e98c9eSNicholas Bellinger cmd->scsi_sense_reason = 160503e98c9eSNicholas Bellinger TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 160603e98c9eSNicholas Bellinger ret = -EINVAL; 1607c66ac9dbSNicholas Bellinger goto out; 1608c66ac9dbSNicholas Bellinger } 1609c66ac9dbSNicholas Bellinger /* 1610c66ac9dbSNicholas Bellinger * Locate the desination initiator ACL to be registered 1611c66ac9dbSNicholas Bellinger * from the decoded fabric module specific TransportID 1612c66ac9dbSNicholas Bellinger * at *i_str. 1613c66ac9dbSNicholas Bellinger */ 161428638887SRoland Dreier spin_lock_irq(&tmp_tpg->acl_node_lock); 1615c66ac9dbSNicholas Bellinger dest_node_acl = __core_tpg_get_initiator_node_acl( 1616c66ac9dbSNicholas Bellinger tmp_tpg, i_str); 1617c66ac9dbSNicholas Bellinger if (dest_node_acl) { 1618c66ac9dbSNicholas Bellinger atomic_inc(&dest_node_acl->acl_pr_ref_count); 1619c66ac9dbSNicholas Bellinger smp_mb__after_atomic_inc(); 1620c66ac9dbSNicholas Bellinger } 162128638887SRoland Dreier spin_unlock_irq(&tmp_tpg->acl_node_lock); 1622c66ac9dbSNicholas Bellinger 16236708bb27SAndy Grover if (!dest_node_acl) { 1624c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(tmp_tpg); 1625c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 1626c66ac9dbSNicholas Bellinger continue; 1627c66ac9dbSNicholas Bellinger } 1628c66ac9dbSNicholas Bellinger 1629c66ac9dbSNicholas Bellinger ret = core_scsi3_nodeacl_depend_item(dest_node_acl); 1630c66ac9dbSNicholas Bellinger if (ret != 0) { 16316708bb27SAndy Grover pr_err("configfs_depend_item() failed" 1632c66ac9dbSNicholas Bellinger " for dest_node_acl->acl_group\n"); 1633c66ac9dbSNicholas Bellinger atomic_dec(&dest_node_acl->acl_pr_ref_count); 1634c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 1635c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(tmp_tpg); 163603e98c9eSNicholas Bellinger cmd->scsi_sense_reason = 163703e98c9eSNicholas Bellinger TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 163803e98c9eSNicholas Bellinger ret = -EINVAL; 1639c66ac9dbSNicholas Bellinger goto out; 1640c66ac9dbSNicholas Bellinger } 1641c66ac9dbSNicholas Bellinger 1642c66ac9dbSNicholas Bellinger dest_tpg = tmp_tpg; 16436708bb27SAndy Grover pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node:" 1644c66ac9dbSNicholas Bellinger " %s Port RTPI: %hu\n", 1645e3d6f909SAndy Grover dest_tpg->se_tpg_tfo->get_fabric_name(), 1646c66ac9dbSNicholas Bellinger dest_node_acl->initiatorname, dest_rtpi); 1647c66ac9dbSNicholas Bellinger 1648c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 1649c66ac9dbSNicholas Bellinger break; 1650c66ac9dbSNicholas Bellinger } 1651c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 1652c66ac9dbSNicholas Bellinger 16536708bb27SAndy Grover if (!dest_tpg) { 16546708bb27SAndy Grover pr_err("SPC-3 PR SPEC_I_PT: Unable to locate" 1655c66ac9dbSNicholas Bellinger " dest_tpg\n"); 165603e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 165703e98c9eSNicholas Bellinger ret = -EINVAL; 1658c66ac9dbSNicholas Bellinger goto out; 1659c66ac9dbSNicholas Bellinger } 1660c66ac9dbSNicholas Bellinger #if 0 16616708bb27SAndy Grover pr_debug("SPC-3 PR SPEC_I_PT: Got %s data_length: %u tpdl: %u" 1662c66ac9dbSNicholas Bellinger " tid_len: %d for %s + %s\n", 1663e3d6f909SAndy Grover dest_tpg->se_tpg_tfo->get_fabric_name(), cmd->data_length, 1664c66ac9dbSNicholas Bellinger tpdl, tid_len, i_str, iport_ptr); 1665c66ac9dbSNicholas Bellinger #endif 1666c66ac9dbSNicholas Bellinger if (tid_len > tpdl) { 16676708bb27SAndy Grover pr_err("SPC-3 PR SPEC_I_PT: Illegal tid_len:" 1668c66ac9dbSNicholas Bellinger " %u for Transport ID: %s\n", tid_len, ptr); 1669c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1670c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 167103e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 167203e98c9eSNicholas Bellinger ret = -EINVAL; 1673c66ac9dbSNicholas Bellinger goto out; 1674c66ac9dbSNicholas Bellinger } 1675c66ac9dbSNicholas Bellinger /* 1676c66ac9dbSNicholas Bellinger * Locate the desintation struct se_dev_entry pointer for matching 1677c66ac9dbSNicholas Bellinger * RELATIVE TARGET PORT IDENTIFIER on the receiving I_T Nexus 1678c66ac9dbSNicholas Bellinger * Target Port. 1679c66ac9dbSNicholas Bellinger */ 1680c66ac9dbSNicholas Bellinger dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, 1681c66ac9dbSNicholas Bellinger dest_rtpi); 16826708bb27SAndy Grover if (!dest_se_deve) { 16836708bb27SAndy Grover pr_err("Unable to locate %s dest_se_deve" 1684c66ac9dbSNicholas Bellinger " from destination RTPI: %hu\n", 1685e3d6f909SAndy Grover dest_tpg->se_tpg_tfo->get_fabric_name(), 1686c66ac9dbSNicholas Bellinger dest_rtpi); 1687c66ac9dbSNicholas Bellinger 1688c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1689c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 169003e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 169103e98c9eSNicholas Bellinger ret = -EINVAL; 1692c66ac9dbSNicholas Bellinger goto out; 1693c66ac9dbSNicholas Bellinger } 1694c66ac9dbSNicholas Bellinger 1695c66ac9dbSNicholas Bellinger ret = core_scsi3_lunacl_depend_item(dest_se_deve); 1696c66ac9dbSNicholas Bellinger if (ret < 0) { 16976708bb27SAndy Grover pr_err("core_scsi3_lunacl_depend_item()" 1698c66ac9dbSNicholas Bellinger " failed\n"); 1699c66ac9dbSNicholas Bellinger atomic_dec(&dest_se_deve->pr_ref_count); 1700c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 1701c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1702c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 170303e98c9eSNicholas Bellinger cmd->scsi_sense_reason = 170403e98c9eSNicholas Bellinger TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 170503e98c9eSNicholas Bellinger ret = -EINVAL; 1706c66ac9dbSNicholas Bellinger goto out; 1707c66ac9dbSNicholas Bellinger } 1708c66ac9dbSNicholas Bellinger #if 0 17096708bb27SAndy Grover pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node: %s" 1710c66ac9dbSNicholas Bellinger " dest_se_deve mapped_lun: %u\n", 1711e3d6f909SAndy Grover dest_tpg->se_tpg_tfo->get_fabric_name(), 1712c66ac9dbSNicholas Bellinger dest_node_acl->initiatorname, dest_se_deve->mapped_lun); 1713c66ac9dbSNicholas Bellinger #endif 1714c66ac9dbSNicholas Bellinger /* 1715c66ac9dbSNicholas Bellinger * Skip any TransportIDs that already have a registration for 1716c66ac9dbSNicholas Bellinger * this target port. 1717c66ac9dbSNicholas Bellinger */ 1718c66ac9dbSNicholas Bellinger pr_reg_e = __core_scsi3_locate_pr_reg(dev, dest_node_acl, 1719c66ac9dbSNicholas Bellinger iport_ptr); 1720c66ac9dbSNicholas Bellinger if (pr_reg_e) { 1721c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_e); 1722c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1723c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1724c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1725c66ac9dbSNicholas Bellinger ptr += tid_len; 1726c66ac9dbSNicholas Bellinger tpdl -= tid_len; 1727c66ac9dbSNicholas Bellinger tid_len = 0; 1728c66ac9dbSNicholas Bellinger continue; 1729c66ac9dbSNicholas Bellinger } 1730c66ac9dbSNicholas Bellinger /* 1731c66ac9dbSNicholas Bellinger * Allocate a struct pr_transport_id_holder and setup 1732c66ac9dbSNicholas Bellinger * the dest_node_acl and dest_se_deve pointers for the 1733c66ac9dbSNicholas Bellinger * loop below. 1734c66ac9dbSNicholas Bellinger */ 1735c66ac9dbSNicholas Bellinger tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), 1736c66ac9dbSNicholas Bellinger GFP_KERNEL); 17376708bb27SAndy Grover if (!tidh_new) { 17386708bb27SAndy Grover pr_err("Unable to allocate tidh_new\n"); 1739c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1740c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1741c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 174203e98c9eSNicholas Bellinger cmd->scsi_sense_reason = 174303e98c9eSNicholas Bellinger TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 174403e98c9eSNicholas Bellinger ret = -ENOMEM; 1745c66ac9dbSNicholas Bellinger goto out; 1746c66ac9dbSNicholas Bellinger } 1747c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&tidh_new->dest_list); 1748c66ac9dbSNicholas Bellinger tidh_new->dest_tpg = dest_tpg; 1749c66ac9dbSNicholas Bellinger tidh_new->dest_node_acl = dest_node_acl; 1750c66ac9dbSNicholas Bellinger tidh_new->dest_se_deve = dest_se_deve; 1751c66ac9dbSNicholas Bellinger 1752c66ac9dbSNicholas Bellinger /* 1753c66ac9dbSNicholas Bellinger * Allocate, but do NOT add the registration for the 1754c66ac9dbSNicholas Bellinger * TransportID referenced SCSI Initiator port. This 1755c66ac9dbSNicholas Bellinger * done because of the following from spc4r17 in section 1756c66ac9dbSNicholas Bellinger * 6.14.3 wrt SPEC_I_PT: 1757c66ac9dbSNicholas Bellinger * 1758c66ac9dbSNicholas Bellinger * "If a registration fails for any initiator port (e.g., if th 1759c66ac9dbSNicholas Bellinger * logical unit does not have enough resources available to 1760c66ac9dbSNicholas Bellinger * hold the registration information), no registrations shall be 1761c66ac9dbSNicholas Bellinger * made, and the command shall be terminated with 1762c66ac9dbSNicholas Bellinger * CHECK CONDITION status." 1763c66ac9dbSNicholas Bellinger * 1764c66ac9dbSNicholas Bellinger * That means we call __core_scsi3_alloc_registration() here, 1765c66ac9dbSNicholas Bellinger * and then call __core_scsi3_add_registration() in the 1766c66ac9dbSNicholas Bellinger * 2nd loop which will never fail. 1767c66ac9dbSNicholas Bellinger */ 17685951146dSAndy Grover dest_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev, 1769c66ac9dbSNicholas Bellinger dest_node_acl, dest_se_deve, iport_ptr, 1770c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl); 17716708bb27SAndy Grover if (!dest_pr_reg) { 1772c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1773c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1774c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1775c66ac9dbSNicholas Bellinger kfree(tidh_new); 177603e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 177703e98c9eSNicholas Bellinger ret = -EINVAL; 1778c66ac9dbSNicholas Bellinger goto out; 1779c66ac9dbSNicholas Bellinger } 1780c66ac9dbSNicholas Bellinger tidh_new->dest_pr_reg = dest_pr_reg; 1781c66ac9dbSNicholas Bellinger list_add_tail(&tidh_new->dest_list, &tid_dest_list); 1782c66ac9dbSNicholas Bellinger 1783c66ac9dbSNicholas Bellinger ptr += tid_len; 1784c66ac9dbSNicholas Bellinger tpdl -= tid_len; 1785c66ac9dbSNicholas Bellinger tid_len = 0; 1786c66ac9dbSNicholas Bellinger 1787c66ac9dbSNicholas Bellinger } 178805d1c7c0SAndy Grover 17894949314cSAndy Grover transport_kunmap_data_sg(cmd); 179005d1c7c0SAndy Grover 1791c66ac9dbSNicholas Bellinger /* 1792c66ac9dbSNicholas Bellinger * Go ahead and create a registrations from tid_dest_list for the 1793c66ac9dbSNicholas Bellinger * SPEC_I_PT provided TransportID for the *tidh referenced dest_node_acl 1794c66ac9dbSNicholas Bellinger * and dest_se_deve. 1795c66ac9dbSNicholas Bellinger * 1796c66ac9dbSNicholas Bellinger * The SA Reservation Key from the PROUT is set for the 1797c66ac9dbSNicholas Bellinger * registration, and ALL_TG_PT is also passed. ALL_TG_PT=1 1798c66ac9dbSNicholas Bellinger * means that the TransportID Initiator port will be 1799c66ac9dbSNicholas Bellinger * registered on all of the target ports in the SCSI target device 1800c66ac9dbSNicholas Bellinger * ALL_TG_PT=0 means the registration will only be for the 1801c66ac9dbSNicholas Bellinger * SCSI target port the PROUT REGISTER with SPEC_I_PT=1 1802c66ac9dbSNicholas Bellinger * was received. 1803c66ac9dbSNicholas Bellinger */ 1804c66ac9dbSNicholas Bellinger list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) { 1805c66ac9dbSNicholas Bellinger dest_tpg = tidh->dest_tpg; 1806c66ac9dbSNicholas Bellinger dest_node_acl = tidh->dest_node_acl; 1807c66ac9dbSNicholas Bellinger dest_se_deve = tidh->dest_se_deve; 1808c66ac9dbSNicholas Bellinger dest_pr_reg = tidh->dest_pr_reg; 1809c66ac9dbSNicholas Bellinger dest_local_nexus = tidh->dest_local_nexus; 1810c66ac9dbSNicholas Bellinger 1811c66ac9dbSNicholas Bellinger list_del(&tidh->dest_list); 1812c66ac9dbSNicholas Bellinger kfree(tidh); 1813c66ac9dbSNicholas Bellinger 1814c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1815c66ac9dbSNicholas Bellinger prf_isid = core_pr_dump_initiator_port(dest_pr_reg, &i_buf[0], 1816c66ac9dbSNicholas Bellinger PR_REG_ISID_ID_LEN); 1817c66ac9dbSNicholas Bellinger 18185951146dSAndy Grover __core_scsi3_add_registration(cmd->se_dev, dest_node_acl, 1819c66ac9dbSNicholas Bellinger dest_pr_reg, 0, 0); 1820c66ac9dbSNicholas Bellinger 18216708bb27SAndy Grover pr_debug("SPC-3 PR [%s] SPEC_I_PT: Successfully" 1822c66ac9dbSNicholas Bellinger " registered Transport ID for Node: %s%s Mapped LUN:" 1823e3d6f909SAndy Grover " %u\n", dest_tpg->se_tpg_tfo->get_fabric_name(), 1824c66ac9dbSNicholas Bellinger dest_node_acl->initiatorname, (prf_isid) ? 1825c66ac9dbSNicholas Bellinger &i_buf[0] : "", dest_se_deve->mapped_lun); 1826c66ac9dbSNicholas Bellinger 1827c66ac9dbSNicholas Bellinger if (dest_local_nexus) 1828c66ac9dbSNicholas Bellinger continue; 1829c66ac9dbSNicholas Bellinger 1830c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1831c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1832c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1833c66ac9dbSNicholas Bellinger } 1834c66ac9dbSNicholas Bellinger 1835c66ac9dbSNicholas Bellinger return 0; 1836c66ac9dbSNicholas Bellinger out: 18374949314cSAndy Grover transport_kunmap_data_sg(cmd); 1838c66ac9dbSNicholas Bellinger /* 1839c66ac9dbSNicholas Bellinger * For the failure case, release everything from tid_dest_list 1840c66ac9dbSNicholas Bellinger * including *dest_pr_reg and the configfs dependances.. 1841c66ac9dbSNicholas Bellinger */ 1842c66ac9dbSNicholas Bellinger list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) { 1843c66ac9dbSNicholas Bellinger dest_tpg = tidh->dest_tpg; 1844c66ac9dbSNicholas Bellinger dest_node_acl = tidh->dest_node_acl; 1845c66ac9dbSNicholas Bellinger dest_se_deve = tidh->dest_se_deve; 1846c66ac9dbSNicholas Bellinger dest_pr_reg = tidh->dest_pr_reg; 1847c66ac9dbSNicholas Bellinger dest_local_nexus = tidh->dest_local_nexus; 1848c66ac9dbSNicholas Bellinger 1849c66ac9dbSNicholas Bellinger list_del(&tidh->dest_list); 1850c66ac9dbSNicholas Bellinger kfree(tidh); 1851c66ac9dbSNicholas Bellinger /* 1852c66ac9dbSNicholas Bellinger * Release any extra ALL_TG_PT=1 registrations for 1853c66ac9dbSNicholas Bellinger * the SPEC_I_PT=1 case. 1854c66ac9dbSNicholas Bellinger */ 1855c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, 1856c66ac9dbSNicholas Bellinger &dest_pr_reg->pr_reg_atp_list, 1857c66ac9dbSNicholas Bellinger pr_reg_atp_mem_list) { 1858c66ac9dbSNicholas Bellinger list_del(&pr_reg_tmp->pr_reg_atp_mem_list); 1859c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); 1860c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp); 1861c66ac9dbSNicholas Bellinger } 1862c66ac9dbSNicholas Bellinger 1863c66ac9dbSNicholas Bellinger kfree(dest_pr_reg->pr_aptpl_buf); 1864c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, dest_pr_reg); 1865c66ac9dbSNicholas Bellinger 1866c66ac9dbSNicholas Bellinger if (dest_local_nexus) 1867c66ac9dbSNicholas Bellinger continue; 1868c66ac9dbSNicholas Bellinger 1869c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1870c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1871c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1872c66ac9dbSNicholas Bellinger } 1873c66ac9dbSNicholas Bellinger return ret; 1874c66ac9dbSNicholas Bellinger } 1875c66ac9dbSNicholas Bellinger 1876c66ac9dbSNicholas Bellinger /* 1877c66ac9dbSNicholas Bellinger * Called with struct se_device->dev_reservation_lock held 1878c66ac9dbSNicholas Bellinger */ 1879c66ac9dbSNicholas Bellinger static int __core_scsi3_update_aptpl_buf( 1880c66ac9dbSNicholas Bellinger struct se_device *dev, 1881c66ac9dbSNicholas Bellinger unsigned char *buf, 1882c66ac9dbSNicholas Bellinger u32 pr_aptpl_buf_len, 1883c66ac9dbSNicholas Bellinger int clear_aptpl_metadata) 1884c66ac9dbSNicholas Bellinger { 1885c66ac9dbSNicholas Bellinger struct se_lun *lun; 1886c66ac9dbSNicholas Bellinger struct se_portal_group *tpg; 1887e3d6f909SAndy Grover struct se_subsystem_dev *su_dev = dev->se_sub_dev; 1888c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 1889c66ac9dbSNicholas Bellinger unsigned char tmp[512], isid_buf[32]; 1890c66ac9dbSNicholas Bellinger ssize_t len = 0; 1891c66ac9dbSNicholas Bellinger int reg_count = 0; 1892c66ac9dbSNicholas Bellinger 1893c66ac9dbSNicholas Bellinger memset(buf, 0, pr_aptpl_buf_len); 1894c66ac9dbSNicholas Bellinger /* 1895c66ac9dbSNicholas Bellinger * Called to clear metadata once APTPL has been deactivated. 1896c66ac9dbSNicholas Bellinger */ 1897c66ac9dbSNicholas Bellinger if (clear_aptpl_metadata) { 1898c66ac9dbSNicholas Bellinger snprintf(buf, pr_aptpl_buf_len, 1899c66ac9dbSNicholas Bellinger "No Registrations or Reservations\n"); 1900c66ac9dbSNicholas Bellinger return 0; 1901c66ac9dbSNicholas Bellinger } 1902c66ac9dbSNicholas Bellinger /* 1903c66ac9dbSNicholas Bellinger * Walk the registration list.. 1904c66ac9dbSNicholas Bellinger */ 1905e3d6f909SAndy Grover spin_lock(&su_dev->t10_pr.registration_lock); 1906e3d6f909SAndy Grover list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list, 1907c66ac9dbSNicholas Bellinger pr_reg_list) { 1908c66ac9dbSNicholas Bellinger 1909c66ac9dbSNicholas Bellinger tmp[0] = '\0'; 1910c66ac9dbSNicholas Bellinger isid_buf[0] = '\0'; 1911c66ac9dbSNicholas Bellinger tpg = pr_reg->pr_reg_nacl->se_tpg; 1912c66ac9dbSNicholas Bellinger lun = pr_reg->pr_reg_tg_pt_lun; 1913c66ac9dbSNicholas Bellinger /* 1914c66ac9dbSNicholas Bellinger * Write out any ISID value to APTPL metadata that was included 1915c66ac9dbSNicholas Bellinger * in the original registration. 1916c66ac9dbSNicholas Bellinger */ 1917c66ac9dbSNicholas Bellinger if (pr_reg->isid_present_at_reg) 1918c66ac9dbSNicholas Bellinger snprintf(isid_buf, 32, "initiator_sid=%s\n", 1919c66ac9dbSNicholas Bellinger pr_reg->pr_reg_isid); 1920c66ac9dbSNicholas Bellinger /* 1921c66ac9dbSNicholas Bellinger * Include special metadata if the pr_reg matches the 1922c66ac9dbSNicholas Bellinger * reservation holder. 1923c66ac9dbSNicholas Bellinger */ 1924c66ac9dbSNicholas Bellinger if (dev->dev_pr_res_holder == pr_reg) { 1925c66ac9dbSNicholas Bellinger snprintf(tmp, 512, "PR_REG_START: %d" 1926c66ac9dbSNicholas Bellinger "\ninitiator_fabric=%s\n" 1927c66ac9dbSNicholas Bellinger "initiator_node=%s\n%s" 1928c66ac9dbSNicholas Bellinger "sa_res_key=%llu\n" 1929c66ac9dbSNicholas Bellinger "res_holder=1\nres_type=%02x\n" 1930c66ac9dbSNicholas Bellinger "res_scope=%02x\nres_all_tg_pt=%d\n" 1931c66ac9dbSNicholas Bellinger "mapped_lun=%u\n", reg_count, 1932e3d6f909SAndy Grover tpg->se_tpg_tfo->get_fabric_name(), 1933c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->initiatorname, isid_buf, 1934c66ac9dbSNicholas Bellinger pr_reg->pr_res_key, pr_reg->pr_res_type, 1935c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope, pr_reg->pr_reg_all_tg_pt, 1936c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun); 1937c66ac9dbSNicholas Bellinger } else { 1938c66ac9dbSNicholas Bellinger snprintf(tmp, 512, "PR_REG_START: %d\n" 1939c66ac9dbSNicholas Bellinger "initiator_fabric=%s\ninitiator_node=%s\n%s" 1940c66ac9dbSNicholas Bellinger "sa_res_key=%llu\nres_holder=0\n" 1941c66ac9dbSNicholas Bellinger "res_all_tg_pt=%d\nmapped_lun=%u\n", 1942e3d6f909SAndy Grover reg_count, tpg->se_tpg_tfo->get_fabric_name(), 1943c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->initiatorname, isid_buf, 1944c66ac9dbSNicholas Bellinger pr_reg->pr_res_key, pr_reg->pr_reg_all_tg_pt, 1945c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun); 1946c66ac9dbSNicholas Bellinger } 1947c66ac9dbSNicholas Bellinger 194860d645a4SDan Carpenter if ((len + strlen(tmp) >= pr_aptpl_buf_len)) { 19496708bb27SAndy Grover pr_err("Unable to update renaming" 1950c66ac9dbSNicholas Bellinger " APTPL metadata\n"); 1951e3d6f909SAndy Grover spin_unlock(&su_dev->t10_pr.registration_lock); 1952e3d6f909SAndy Grover return -EMSGSIZE; 1953c66ac9dbSNicholas Bellinger } 1954c66ac9dbSNicholas Bellinger len += sprintf(buf+len, "%s", tmp); 1955c66ac9dbSNicholas Bellinger 1956c66ac9dbSNicholas Bellinger /* 1957c66ac9dbSNicholas Bellinger * Include information about the associated SCSI target port. 1958c66ac9dbSNicholas Bellinger */ 1959c66ac9dbSNicholas Bellinger snprintf(tmp, 512, "target_fabric=%s\ntarget_node=%s\n" 1960c66ac9dbSNicholas Bellinger "tpgt=%hu\nport_rtpi=%hu\ntarget_lun=%u\nPR_REG_END:" 1961e3d6f909SAndy Grover " %d\n", tpg->se_tpg_tfo->get_fabric_name(), 1962e3d6f909SAndy Grover tpg->se_tpg_tfo->tpg_get_wwn(tpg), 1963e3d6f909SAndy Grover tpg->se_tpg_tfo->tpg_get_tag(tpg), 1964c66ac9dbSNicholas Bellinger lun->lun_sep->sep_rtpi, lun->unpacked_lun, reg_count); 1965c66ac9dbSNicholas Bellinger 196660d645a4SDan Carpenter if ((len + strlen(tmp) >= pr_aptpl_buf_len)) { 19676708bb27SAndy Grover pr_err("Unable to update renaming" 1968c66ac9dbSNicholas Bellinger " APTPL metadata\n"); 1969e3d6f909SAndy Grover spin_unlock(&su_dev->t10_pr.registration_lock); 1970e3d6f909SAndy Grover return -EMSGSIZE; 1971c66ac9dbSNicholas Bellinger } 1972c66ac9dbSNicholas Bellinger len += sprintf(buf+len, "%s", tmp); 1973c66ac9dbSNicholas Bellinger reg_count++; 1974c66ac9dbSNicholas Bellinger } 1975e3d6f909SAndy Grover spin_unlock(&su_dev->t10_pr.registration_lock); 1976c66ac9dbSNicholas Bellinger 19776708bb27SAndy Grover if (!reg_count) 1978c66ac9dbSNicholas Bellinger len += sprintf(buf+len, "No Registrations or Reservations"); 1979c66ac9dbSNicholas Bellinger 1980c66ac9dbSNicholas Bellinger return 0; 1981c66ac9dbSNicholas Bellinger } 1982c66ac9dbSNicholas Bellinger 1983c66ac9dbSNicholas Bellinger static int core_scsi3_update_aptpl_buf( 1984c66ac9dbSNicholas Bellinger struct se_device *dev, 1985c66ac9dbSNicholas Bellinger unsigned char *buf, 1986c66ac9dbSNicholas Bellinger u32 pr_aptpl_buf_len, 1987c66ac9dbSNicholas Bellinger int clear_aptpl_metadata) 1988c66ac9dbSNicholas Bellinger { 1989c66ac9dbSNicholas Bellinger int ret; 1990c66ac9dbSNicholas Bellinger 1991c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 1992c66ac9dbSNicholas Bellinger ret = __core_scsi3_update_aptpl_buf(dev, buf, pr_aptpl_buf_len, 1993c66ac9dbSNicholas Bellinger clear_aptpl_metadata); 1994c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1995c66ac9dbSNicholas Bellinger 1996c66ac9dbSNicholas Bellinger return ret; 1997c66ac9dbSNicholas Bellinger } 1998c66ac9dbSNicholas Bellinger 1999c66ac9dbSNicholas Bellinger /* 2000c66ac9dbSNicholas Bellinger * Called with struct se_device->aptpl_file_mutex held 2001c66ac9dbSNicholas Bellinger */ 2002c66ac9dbSNicholas Bellinger static int __core_scsi3_write_aptpl_to_file( 2003c66ac9dbSNicholas Bellinger struct se_device *dev, 2004c66ac9dbSNicholas Bellinger unsigned char *buf, 2005c66ac9dbSNicholas Bellinger u32 pr_aptpl_buf_len) 2006c66ac9dbSNicholas Bellinger { 2007e3d6f909SAndy Grover struct t10_wwn *wwn = &dev->se_sub_dev->t10_wwn; 2008c66ac9dbSNicholas Bellinger struct file *file; 2009c66ac9dbSNicholas Bellinger struct iovec iov[1]; 2010c66ac9dbSNicholas Bellinger mm_segment_t old_fs; 2011c66ac9dbSNicholas Bellinger int flags = O_RDWR | O_CREAT | O_TRUNC; 2012c66ac9dbSNicholas Bellinger char path[512]; 2013c66ac9dbSNicholas Bellinger int ret; 2014c66ac9dbSNicholas Bellinger 2015c66ac9dbSNicholas Bellinger memset(iov, 0, sizeof(struct iovec)); 2016c66ac9dbSNicholas Bellinger memset(path, 0, 512); 2017c66ac9dbSNicholas Bellinger 201860d645a4SDan Carpenter if (strlen(&wwn->unit_serial[0]) >= 512) { 20196708bb27SAndy Grover pr_err("WWN value for struct se_device does not fit" 2020c66ac9dbSNicholas Bellinger " into path buffer\n"); 2021e3d6f909SAndy Grover return -EMSGSIZE; 2022c66ac9dbSNicholas Bellinger } 2023c66ac9dbSNicholas Bellinger 2024c66ac9dbSNicholas Bellinger snprintf(path, 512, "/var/target/pr/aptpl_%s", &wwn->unit_serial[0]); 2025c66ac9dbSNicholas Bellinger file = filp_open(path, flags, 0600); 2026c66ac9dbSNicholas Bellinger if (IS_ERR(file) || !file || !file->f_dentry) { 20276708bb27SAndy Grover pr_err("filp_open(%s) for APTPL metadata" 2028c66ac9dbSNicholas Bellinger " failed\n", path); 2029e3d6f909SAndy Grover return (PTR_ERR(file) < 0 ? PTR_ERR(file) : -ENOENT); 2030c66ac9dbSNicholas Bellinger } 2031c66ac9dbSNicholas Bellinger 2032c66ac9dbSNicholas Bellinger iov[0].iov_base = &buf[0]; 20336708bb27SAndy Grover if (!pr_aptpl_buf_len) 2034c66ac9dbSNicholas Bellinger iov[0].iov_len = (strlen(&buf[0]) + 1); /* Add extra for NULL */ 2035c66ac9dbSNicholas Bellinger else 2036c66ac9dbSNicholas Bellinger iov[0].iov_len = pr_aptpl_buf_len; 2037c66ac9dbSNicholas Bellinger 2038c66ac9dbSNicholas Bellinger old_fs = get_fs(); 2039c66ac9dbSNicholas Bellinger set_fs(get_ds()); 2040c66ac9dbSNicholas Bellinger ret = vfs_writev(file, &iov[0], 1, &file->f_pos); 2041c66ac9dbSNicholas Bellinger set_fs(old_fs); 2042c66ac9dbSNicholas Bellinger 2043c66ac9dbSNicholas Bellinger if (ret < 0) { 20446708bb27SAndy Grover pr_debug("Error writing APTPL metadata file: %s\n", path); 2045c66ac9dbSNicholas Bellinger filp_close(file, NULL); 2046e3d6f909SAndy Grover return -EIO; 2047c66ac9dbSNicholas Bellinger } 2048c66ac9dbSNicholas Bellinger filp_close(file, NULL); 2049c66ac9dbSNicholas Bellinger 2050c66ac9dbSNicholas Bellinger return 0; 2051c66ac9dbSNicholas Bellinger } 2052c66ac9dbSNicholas Bellinger 2053c66ac9dbSNicholas Bellinger static int core_scsi3_update_and_write_aptpl( 2054c66ac9dbSNicholas Bellinger struct se_device *dev, 2055c66ac9dbSNicholas Bellinger unsigned char *in_buf, 2056c66ac9dbSNicholas Bellinger u32 in_pr_aptpl_buf_len) 2057c66ac9dbSNicholas Bellinger { 2058c66ac9dbSNicholas Bellinger unsigned char null_buf[64], *buf; 2059c66ac9dbSNicholas Bellinger u32 pr_aptpl_buf_len; 2060c66ac9dbSNicholas Bellinger int ret, clear_aptpl_metadata = 0; 2061c66ac9dbSNicholas Bellinger /* 2062c66ac9dbSNicholas Bellinger * Can be called with a NULL pointer from PROUT service action CLEAR 2063c66ac9dbSNicholas Bellinger */ 20646708bb27SAndy Grover if (!in_buf) { 2065c66ac9dbSNicholas Bellinger memset(null_buf, 0, 64); 2066c66ac9dbSNicholas Bellinger buf = &null_buf[0]; 2067c66ac9dbSNicholas Bellinger /* 2068c66ac9dbSNicholas Bellinger * This will clear the APTPL metadata to: 2069c66ac9dbSNicholas Bellinger * "No Registrations or Reservations" status 2070c66ac9dbSNicholas Bellinger */ 2071c66ac9dbSNicholas Bellinger pr_aptpl_buf_len = 64; 2072c66ac9dbSNicholas Bellinger clear_aptpl_metadata = 1; 2073c66ac9dbSNicholas Bellinger } else { 2074c66ac9dbSNicholas Bellinger buf = in_buf; 2075c66ac9dbSNicholas Bellinger pr_aptpl_buf_len = in_pr_aptpl_buf_len; 2076c66ac9dbSNicholas Bellinger } 2077c66ac9dbSNicholas Bellinger 2078c66ac9dbSNicholas Bellinger ret = core_scsi3_update_aptpl_buf(dev, buf, pr_aptpl_buf_len, 2079c66ac9dbSNicholas Bellinger clear_aptpl_metadata); 2080c66ac9dbSNicholas Bellinger if (ret != 0) 2081e3d6f909SAndy Grover return ret; 2082c66ac9dbSNicholas Bellinger /* 2083c66ac9dbSNicholas Bellinger * __core_scsi3_write_aptpl_to_file() will call strlen() 2084c66ac9dbSNicholas Bellinger * on the passed buf to determine pr_aptpl_buf_len. 2085c66ac9dbSNicholas Bellinger */ 2086c66ac9dbSNicholas Bellinger ret = __core_scsi3_write_aptpl_to_file(dev, buf, 0); 2087c66ac9dbSNicholas Bellinger if (ret != 0) 2088e3d6f909SAndy Grover return ret; 2089c66ac9dbSNicholas Bellinger 2090c66ac9dbSNicholas Bellinger return ret; 2091c66ac9dbSNicholas Bellinger } 2092c66ac9dbSNicholas Bellinger 2093c66ac9dbSNicholas Bellinger static int core_scsi3_emulate_pro_register( 2094c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 2095c66ac9dbSNicholas Bellinger u64 res_key, 2096c66ac9dbSNicholas Bellinger u64 sa_res_key, 2097c66ac9dbSNicholas Bellinger int aptpl, 2098c66ac9dbSNicholas Bellinger int all_tg_pt, 2099c66ac9dbSNicholas Bellinger int spec_i_pt, 2100c66ac9dbSNicholas Bellinger int ignore_key) 2101c66ac9dbSNicholas Bellinger { 2102e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 21035951146dSAndy Grover struct se_device *dev = cmd->se_dev; 2104c66ac9dbSNicholas Bellinger struct se_dev_entry *se_deve; 2105e3d6f909SAndy Grover struct se_lun *se_lun = cmd->se_lun; 2106c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg; 2107c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_reg_tmp, *pr_reg_e; 2108e3d6f909SAndy Grover struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; 2109c66ac9dbSNicholas Bellinger /* Used for APTPL metadata w/ UNREGISTER */ 2110c66ac9dbSNicholas Bellinger unsigned char *pr_aptpl_buf = NULL; 2111c66ac9dbSNicholas Bellinger unsigned char isid_buf[PR_REG_ISID_LEN], *isid_ptr = NULL; 2112c66ac9dbSNicholas Bellinger int pr_holder = 0, ret = 0, type; 2113c66ac9dbSNicholas Bellinger 21146708bb27SAndy Grover if (!se_sess || !se_lun) { 21156708bb27SAndy Grover pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); 211603e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 211703e98c9eSNicholas Bellinger return -EINVAL; 2118c66ac9dbSNicholas Bellinger } 2119c66ac9dbSNicholas Bellinger se_tpg = se_sess->se_tpg; 2120c66ac9dbSNicholas Bellinger se_deve = &se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; 2121c66ac9dbSNicholas Bellinger 2122e3d6f909SAndy Grover if (se_tpg->se_tpg_tfo->sess_get_initiator_sid) { 2123c66ac9dbSNicholas Bellinger memset(&isid_buf[0], 0, PR_REG_ISID_LEN); 2124e3d6f909SAndy Grover se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, &isid_buf[0], 2125c66ac9dbSNicholas Bellinger PR_REG_ISID_LEN); 2126c66ac9dbSNicholas Bellinger isid_ptr = &isid_buf[0]; 2127c66ac9dbSNicholas Bellinger } 2128c66ac9dbSNicholas Bellinger /* 2129c66ac9dbSNicholas Bellinger * Follow logic from spc4r17 Section 5.7.7, Register Behaviors Table 47 2130c66ac9dbSNicholas Bellinger */ 2131c66ac9dbSNicholas Bellinger pr_reg_e = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess); 21326708bb27SAndy Grover if (!pr_reg_e) { 2133c66ac9dbSNicholas Bellinger if (res_key) { 21346708bb27SAndy Grover pr_warn("SPC-3 PR: Reservation Key non-zero" 2135c66ac9dbSNicholas Bellinger " for SA REGISTER, returning CONFLICT\n"); 213603e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 213703e98c9eSNicholas Bellinger return -EINVAL; 2138c66ac9dbSNicholas Bellinger } 2139c66ac9dbSNicholas Bellinger /* 2140c66ac9dbSNicholas Bellinger * Do nothing but return GOOD status. 2141c66ac9dbSNicholas Bellinger */ 21426708bb27SAndy Grover if (!sa_res_key) 214303e98c9eSNicholas Bellinger return 0; 2144c66ac9dbSNicholas Bellinger 21456708bb27SAndy Grover if (!spec_i_pt) { 2146c66ac9dbSNicholas Bellinger /* 2147c66ac9dbSNicholas Bellinger * Perform the Service Action REGISTER on the Initiator 2148c66ac9dbSNicholas Bellinger * Port Endpoint that the PRO was received from on the 2149c66ac9dbSNicholas Bellinger * Logical Unit of the SCSI device server. 2150c66ac9dbSNicholas Bellinger */ 21515951146dSAndy Grover ret = core_scsi3_alloc_registration(cmd->se_dev, 2152c66ac9dbSNicholas Bellinger se_sess->se_node_acl, se_deve, isid_ptr, 2153c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl, 2154c66ac9dbSNicholas Bellinger ignore_key, 0); 2155c66ac9dbSNicholas Bellinger if (ret != 0) { 21566708bb27SAndy Grover pr_err("Unable to allocate" 2157c66ac9dbSNicholas Bellinger " struct t10_pr_registration\n"); 215803e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 215903e98c9eSNicholas Bellinger return -EINVAL; 2160c66ac9dbSNicholas Bellinger } 2161c66ac9dbSNicholas Bellinger } else { 2162c66ac9dbSNicholas Bellinger /* 2163c66ac9dbSNicholas Bellinger * Register both the Initiator port that received 2164c66ac9dbSNicholas Bellinger * PROUT SA REGISTER + SPEC_I_PT=1 and extract SCSI 2165c66ac9dbSNicholas Bellinger * TransportID from Parameter list and loop through 2166c66ac9dbSNicholas Bellinger * fabric dependent parameter list while calling 2167c66ac9dbSNicholas Bellinger * logic from of core_scsi3_alloc_registration() for 2168c66ac9dbSNicholas Bellinger * each TransportID provided SCSI Initiator Port/Device 2169c66ac9dbSNicholas Bellinger */ 2170c66ac9dbSNicholas Bellinger ret = core_scsi3_decode_spec_i_port(cmd, se_tpg, 2171c66ac9dbSNicholas Bellinger isid_ptr, sa_res_key, all_tg_pt, aptpl); 2172c66ac9dbSNicholas Bellinger if (ret != 0) 2173c66ac9dbSNicholas Bellinger return ret; 2174c66ac9dbSNicholas Bellinger } 2175c66ac9dbSNicholas Bellinger /* 2176c66ac9dbSNicholas Bellinger * Nothing left to do for the APTPL=0 case. 2177c66ac9dbSNicholas Bellinger */ 21786708bb27SAndy Grover if (!aptpl) { 2179c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_active = 0; 21805951146dSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, NULL, 0); 21816708bb27SAndy Grover pr_debug("SPC-3 PR: Set APTPL Bit Deactivated for" 2182c66ac9dbSNicholas Bellinger " REGISTER\n"); 2183c66ac9dbSNicholas Bellinger return 0; 2184c66ac9dbSNicholas Bellinger } 2185c66ac9dbSNicholas Bellinger /* 2186c66ac9dbSNicholas Bellinger * Locate the newly allocated local I_T Nexus *pr_reg, and 2187c66ac9dbSNicholas Bellinger * update the APTPL metadata information using its 2188c66ac9dbSNicholas Bellinger * preallocated *pr_reg->pr_aptpl_buf. 2189c66ac9dbSNicholas Bellinger */ 21905951146dSAndy Grover pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, 2191c66ac9dbSNicholas Bellinger se_sess->se_node_acl, se_sess); 2192c66ac9dbSNicholas Bellinger 21935951146dSAndy Grover ret = core_scsi3_update_and_write_aptpl(cmd->se_dev, 2194c66ac9dbSNicholas Bellinger &pr_reg->pr_aptpl_buf[0], 2195c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_buf_len); 21966708bb27SAndy Grover if (!ret) { 2197c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_active = 1; 21986708bb27SAndy Grover pr_debug("SPC-3 PR: Set APTPL Bit Activated for REGISTER\n"); 2199c66ac9dbSNicholas Bellinger } 2200c66ac9dbSNicholas Bellinger 2201c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2202c66ac9dbSNicholas Bellinger return ret; 2203c66ac9dbSNicholas Bellinger } else { 2204c66ac9dbSNicholas Bellinger /* 2205c66ac9dbSNicholas Bellinger * Locate the existing *pr_reg via struct se_node_acl pointers 2206c66ac9dbSNicholas Bellinger */ 2207c66ac9dbSNicholas Bellinger pr_reg = pr_reg_e; 2208c66ac9dbSNicholas Bellinger type = pr_reg->pr_res_type; 2209c66ac9dbSNicholas Bellinger 22106708bb27SAndy Grover if (!ignore_key) { 2211c66ac9dbSNicholas Bellinger if (res_key != pr_reg->pr_res_key) { 22126708bb27SAndy Grover pr_err("SPC-3 PR REGISTER: Received" 2213c66ac9dbSNicholas Bellinger " res_key: 0x%016Lx does not match" 2214c66ac9dbSNicholas Bellinger " existing SA REGISTER res_key:" 2215c66ac9dbSNicholas Bellinger " 0x%016Lx\n", res_key, 2216c66ac9dbSNicholas Bellinger pr_reg->pr_res_key); 2217c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 221803e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 221903e98c9eSNicholas Bellinger return -EINVAL; 2220c66ac9dbSNicholas Bellinger } 2221c66ac9dbSNicholas Bellinger } 2222c66ac9dbSNicholas Bellinger if (spec_i_pt) { 22236708bb27SAndy Grover pr_err("SPC-3 PR UNREGISTER: SPEC_I_PT" 2224c66ac9dbSNicholas Bellinger " set while sa_res_key=0\n"); 2225c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 222603e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 222703e98c9eSNicholas Bellinger return -EINVAL; 2228c66ac9dbSNicholas Bellinger } 2229c66ac9dbSNicholas Bellinger /* 2230c66ac9dbSNicholas Bellinger * An existing ALL_TG_PT=1 registration being released 2231c66ac9dbSNicholas Bellinger * must also set ALL_TG_PT=1 in the incoming PROUT. 2232c66ac9dbSNicholas Bellinger */ 2233c66ac9dbSNicholas Bellinger if (pr_reg->pr_reg_all_tg_pt && !(all_tg_pt)) { 22346708bb27SAndy Grover pr_err("SPC-3 PR UNREGISTER: ALL_TG_PT=1" 2235c66ac9dbSNicholas Bellinger " registration exists, but ALL_TG_PT=1 bit not" 2236c66ac9dbSNicholas Bellinger " present in received PROUT\n"); 2237c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 223803e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; 223903e98c9eSNicholas Bellinger return -EINVAL; 2240c66ac9dbSNicholas Bellinger } 2241c66ac9dbSNicholas Bellinger /* 2242c66ac9dbSNicholas Bellinger * Allocate APTPL metadata buffer used for UNREGISTER ops 2243c66ac9dbSNicholas Bellinger */ 2244c66ac9dbSNicholas Bellinger if (aptpl) { 2245c66ac9dbSNicholas Bellinger pr_aptpl_buf = kzalloc(pr_tmpl->pr_aptpl_buf_len, 2246c66ac9dbSNicholas Bellinger GFP_KERNEL); 22476708bb27SAndy Grover if (!pr_aptpl_buf) { 22486708bb27SAndy Grover pr_err("Unable to allocate" 2249c66ac9dbSNicholas Bellinger " pr_aptpl_buf\n"); 2250c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 225103e98c9eSNicholas Bellinger cmd->scsi_sense_reason = 225203e98c9eSNicholas Bellinger TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 225303e98c9eSNicholas Bellinger return -EINVAL; 2254c66ac9dbSNicholas Bellinger } 2255c66ac9dbSNicholas Bellinger } 2256c66ac9dbSNicholas Bellinger /* 2257c66ac9dbSNicholas Bellinger * sa_res_key=0 Unregister Reservation Key for registered I_T 2258c66ac9dbSNicholas Bellinger * Nexus sa_res_key=1 Change Reservation Key for registered I_T 2259c66ac9dbSNicholas Bellinger * Nexus. 2260c66ac9dbSNicholas Bellinger */ 22616708bb27SAndy Grover if (!sa_res_key) { 2262c66ac9dbSNicholas Bellinger pr_holder = core_scsi3_check_implict_release( 22635951146dSAndy Grover cmd->se_dev, pr_reg); 2264c66ac9dbSNicholas Bellinger if (pr_holder < 0) { 2265c66ac9dbSNicholas Bellinger kfree(pr_aptpl_buf); 2266c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 226703e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 226803e98c9eSNicholas Bellinger return -EINVAL; 2269c66ac9dbSNicholas Bellinger } 2270c66ac9dbSNicholas Bellinger 2271c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 2272c66ac9dbSNicholas Bellinger /* 2273c66ac9dbSNicholas Bellinger * Release all ALL_TG_PT=1 for the matching SCSI Initiator Port 2274c66ac9dbSNicholas Bellinger * and matching pr_res_key. 2275c66ac9dbSNicholas Bellinger */ 2276c66ac9dbSNicholas Bellinger if (pr_reg->pr_reg_all_tg_pt) { 2277c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg_p, pr_reg_tmp, 2278c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, 2279c66ac9dbSNicholas Bellinger pr_reg_list) { 2280c66ac9dbSNicholas Bellinger 22816708bb27SAndy Grover if (!pr_reg_p->pr_reg_all_tg_pt) 2282c66ac9dbSNicholas Bellinger continue; 2283c66ac9dbSNicholas Bellinger 2284c66ac9dbSNicholas Bellinger if (pr_reg_p->pr_res_key != res_key) 2285c66ac9dbSNicholas Bellinger continue; 2286c66ac9dbSNicholas Bellinger 2287c66ac9dbSNicholas Bellinger if (pr_reg == pr_reg_p) 2288c66ac9dbSNicholas Bellinger continue; 2289c66ac9dbSNicholas Bellinger 2290c66ac9dbSNicholas Bellinger if (strcmp(pr_reg->pr_reg_nacl->initiatorname, 2291c66ac9dbSNicholas Bellinger pr_reg_p->pr_reg_nacl->initiatorname)) 2292c66ac9dbSNicholas Bellinger continue; 2293c66ac9dbSNicholas Bellinger 2294c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, 2295c66ac9dbSNicholas Bellinger pr_reg_p, NULL, 0); 2296c66ac9dbSNicholas Bellinger } 2297c66ac9dbSNicholas Bellinger } 2298c66ac9dbSNicholas Bellinger /* 2299c66ac9dbSNicholas Bellinger * Release the calling I_T Nexus registration now.. 2300c66ac9dbSNicholas Bellinger */ 23015951146dSAndy Grover __core_scsi3_free_registration(cmd->se_dev, pr_reg, 2302c66ac9dbSNicholas Bellinger NULL, 1); 2303c66ac9dbSNicholas Bellinger /* 2304c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.11.3 Unregistering 2305c66ac9dbSNicholas Bellinger * 2306c66ac9dbSNicholas Bellinger * If the persistent reservation is a registrants only 2307c66ac9dbSNicholas Bellinger * type, the device server shall establish a unit 2308c66ac9dbSNicholas Bellinger * attention condition for the initiator port associated 2309c66ac9dbSNicholas Bellinger * with every registered I_T nexus except for the I_T 2310c66ac9dbSNicholas Bellinger * nexus on which the PERSISTENT RESERVE OUT command was 2311c66ac9dbSNicholas Bellinger * received, with the additional sense code set to 2312c66ac9dbSNicholas Bellinger * RESERVATIONS RELEASED. 2313c66ac9dbSNicholas Bellinger */ 2314c66ac9dbSNicholas Bellinger if (pr_holder && 2315c66ac9dbSNicholas Bellinger ((type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY) || 2316c66ac9dbSNicholas Bellinger (type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY))) { 2317c66ac9dbSNicholas Bellinger list_for_each_entry(pr_reg_p, 2318c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, 2319c66ac9dbSNicholas Bellinger pr_reg_list) { 2320c66ac9dbSNicholas Bellinger 2321c66ac9dbSNicholas Bellinger core_scsi3_ua_allocate( 2322c66ac9dbSNicholas Bellinger pr_reg_p->pr_reg_nacl, 2323c66ac9dbSNicholas Bellinger pr_reg_p->pr_res_mapped_lun, 2324c66ac9dbSNicholas Bellinger 0x2A, 2325c66ac9dbSNicholas Bellinger ASCQ_2AH_RESERVATIONS_RELEASED); 2326c66ac9dbSNicholas Bellinger } 2327c66ac9dbSNicholas Bellinger } 2328c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 2329c66ac9dbSNicholas Bellinger 23306708bb27SAndy Grover if (!aptpl) { 2331c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_active = 0; 2332c66ac9dbSNicholas Bellinger core_scsi3_update_and_write_aptpl(dev, NULL, 0); 23336708bb27SAndy Grover pr_debug("SPC-3 PR: Set APTPL Bit Deactivated" 2334c66ac9dbSNicholas Bellinger " for UNREGISTER\n"); 2335c66ac9dbSNicholas Bellinger return 0; 2336c66ac9dbSNicholas Bellinger } 2337c66ac9dbSNicholas Bellinger 2338c66ac9dbSNicholas Bellinger ret = core_scsi3_update_and_write_aptpl(dev, 2339c66ac9dbSNicholas Bellinger &pr_aptpl_buf[0], 2340c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_buf_len); 23416708bb27SAndy Grover if (!ret) { 2342c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_active = 1; 23436708bb27SAndy Grover pr_debug("SPC-3 PR: Set APTPL Bit Activated" 2344c66ac9dbSNicholas Bellinger " for UNREGISTER\n"); 2345c66ac9dbSNicholas Bellinger } 2346c66ac9dbSNicholas Bellinger 2347c66ac9dbSNicholas Bellinger kfree(pr_aptpl_buf); 2348c66ac9dbSNicholas Bellinger return ret; 2349c66ac9dbSNicholas Bellinger } else { 2350c66ac9dbSNicholas Bellinger /* 2351c66ac9dbSNicholas Bellinger * Increment PRgeneration counter for struct se_device" 2352c66ac9dbSNicholas Bellinger * upon a successful REGISTER, see spc4r17 section 6.3.2 2353c66ac9dbSNicholas Bellinger * READ_KEYS service action. 2354c66ac9dbSNicholas Bellinger */ 2355c66ac9dbSNicholas Bellinger pr_reg->pr_res_generation = core_scsi3_pr_generation( 23565951146dSAndy Grover cmd->se_dev); 2357c66ac9dbSNicholas Bellinger pr_reg->pr_res_key = sa_res_key; 23586708bb27SAndy Grover pr_debug("SPC-3 PR [%s] REGISTER%s: Changed Reservation" 2359c66ac9dbSNicholas Bellinger " Key for %s to: 0x%016Lx PRgeneration:" 2360e3d6f909SAndy Grover " 0x%08x\n", cmd->se_tfo->get_fabric_name(), 2361c66ac9dbSNicholas Bellinger (ignore_key) ? "_AND_IGNORE_EXISTING_KEY" : "", 2362c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->initiatorname, 2363c66ac9dbSNicholas Bellinger pr_reg->pr_res_key, pr_reg->pr_res_generation); 2364c66ac9dbSNicholas Bellinger 23656708bb27SAndy Grover if (!aptpl) { 2366c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_active = 0; 2367c66ac9dbSNicholas Bellinger core_scsi3_update_and_write_aptpl(dev, NULL, 0); 2368c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 23696708bb27SAndy Grover pr_debug("SPC-3 PR: Set APTPL Bit Deactivated" 2370c66ac9dbSNicholas Bellinger " for REGISTER\n"); 2371c66ac9dbSNicholas Bellinger return 0; 2372c66ac9dbSNicholas Bellinger } 2373c66ac9dbSNicholas Bellinger 2374c66ac9dbSNicholas Bellinger ret = core_scsi3_update_and_write_aptpl(dev, 2375c66ac9dbSNicholas Bellinger &pr_aptpl_buf[0], 2376c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_buf_len); 23776708bb27SAndy Grover if (!ret) { 2378c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_active = 1; 23796708bb27SAndy Grover pr_debug("SPC-3 PR: Set APTPL Bit Activated" 2380c66ac9dbSNicholas Bellinger " for REGISTER\n"); 2381c66ac9dbSNicholas Bellinger } 2382c66ac9dbSNicholas Bellinger 2383c66ac9dbSNicholas Bellinger kfree(pr_aptpl_buf); 2384c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2385c66ac9dbSNicholas Bellinger } 2386c66ac9dbSNicholas Bellinger } 2387c66ac9dbSNicholas Bellinger return 0; 2388c66ac9dbSNicholas Bellinger } 2389c66ac9dbSNicholas Bellinger 2390c66ac9dbSNicholas Bellinger unsigned char *core_scsi3_pr_dump_type(int type) 2391c66ac9dbSNicholas Bellinger { 2392c66ac9dbSNicholas Bellinger switch (type) { 2393c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE: 2394c66ac9dbSNicholas Bellinger return "Write Exclusive Access"; 2395c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS: 2396c66ac9dbSNicholas Bellinger return "Exclusive Access"; 2397c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: 2398c66ac9dbSNicholas Bellinger return "Write Exclusive Access, Registrants Only"; 2399c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: 2400c66ac9dbSNicholas Bellinger return "Exclusive Access, Registrants Only"; 2401c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: 2402c66ac9dbSNicholas Bellinger return "Write Exclusive Access, All Registrants"; 2403c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: 2404c66ac9dbSNicholas Bellinger return "Exclusive Access, All Registrants"; 2405c66ac9dbSNicholas Bellinger default: 2406c66ac9dbSNicholas Bellinger break; 2407c66ac9dbSNicholas Bellinger } 2408c66ac9dbSNicholas Bellinger 2409c66ac9dbSNicholas Bellinger return "Unknown SPC-3 PR Type"; 2410c66ac9dbSNicholas Bellinger } 2411c66ac9dbSNicholas Bellinger 2412c66ac9dbSNicholas Bellinger static int core_scsi3_pro_reserve( 2413c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 2414c66ac9dbSNicholas Bellinger struct se_device *dev, 2415c66ac9dbSNicholas Bellinger int type, 2416c66ac9dbSNicholas Bellinger int scope, 2417c66ac9dbSNicholas Bellinger u64 res_key) 2418c66ac9dbSNicholas Bellinger { 2419e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 2420c66ac9dbSNicholas Bellinger struct se_dev_entry *se_deve; 2421e3d6f909SAndy Grover struct se_lun *se_lun = cmd->se_lun; 2422c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg; 2423c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_res_holder; 2424e3d6f909SAndy Grover struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; 2425c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 2426c66ac9dbSNicholas Bellinger int ret, prf_isid; 2427c66ac9dbSNicholas Bellinger 2428c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 2429c66ac9dbSNicholas Bellinger 24306708bb27SAndy Grover if (!se_sess || !se_lun) { 24316708bb27SAndy Grover pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); 243203e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 243303e98c9eSNicholas Bellinger return -EINVAL; 2434c66ac9dbSNicholas Bellinger } 2435c66ac9dbSNicholas Bellinger se_tpg = se_sess->se_tpg; 2436c66ac9dbSNicholas Bellinger se_deve = &se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; 2437c66ac9dbSNicholas Bellinger /* 2438c66ac9dbSNicholas Bellinger * Locate the existing *pr_reg via struct se_node_acl pointers 2439c66ac9dbSNicholas Bellinger */ 24405951146dSAndy Grover pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, 2441c66ac9dbSNicholas Bellinger se_sess); 24426708bb27SAndy Grover if (!pr_reg) { 24436708bb27SAndy Grover pr_err("SPC-3 PR: Unable to locate" 2444c66ac9dbSNicholas Bellinger " PR_REGISTERED *pr_reg for RESERVE\n"); 244503e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 244603e98c9eSNicholas Bellinger return -EINVAL; 2447c66ac9dbSNicholas Bellinger } 2448c66ac9dbSNicholas Bellinger /* 2449c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2450c66ac9dbSNicholas Bellinger * 2451c66ac9dbSNicholas Bellinger * An application client creates a persistent reservation by issuing 2452c66ac9dbSNicholas Bellinger * a PERSISTENT RESERVE OUT command with RESERVE service action through 2453c66ac9dbSNicholas Bellinger * a registered I_T nexus with the following parameters: 2454c66ac9dbSNicholas Bellinger * a) RESERVATION KEY set to the value of the reservation key that is 2455c66ac9dbSNicholas Bellinger * registered with the logical unit for the I_T nexus; and 2456c66ac9dbSNicholas Bellinger */ 2457c66ac9dbSNicholas Bellinger if (res_key != pr_reg->pr_res_key) { 24586708bb27SAndy Grover pr_err("SPC-3 PR RESERVE: Received res_key: 0x%016Lx" 2459c66ac9dbSNicholas Bellinger " does not match existing SA REGISTER res_key:" 2460c66ac9dbSNicholas Bellinger " 0x%016Lx\n", res_key, pr_reg->pr_res_key); 2461c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 246203e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 246303e98c9eSNicholas Bellinger return -EINVAL; 2464c66ac9dbSNicholas Bellinger } 2465c66ac9dbSNicholas Bellinger /* 2466c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2467c66ac9dbSNicholas Bellinger * 2468c66ac9dbSNicholas Bellinger * From above: 2469c66ac9dbSNicholas Bellinger * b) TYPE field and SCOPE field set to the persistent reservation 2470c66ac9dbSNicholas Bellinger * being created. 2471c66ac9dbSNicholas Bellinger * 2472c66ac9dbSNicholas Bellinger * Only one persistent reservation is allowed at a time per logical unit 2473c66ac9dbSNicholas Bellinger * and that persistent reservation has a scope of LU_SCOPE. 2474c66ac9dbSNicholas Bellinger */ 2475c66ac9dbSNicholas Bellinger if (scope != PR_SCOPE_LU_SCOPE) { 24766708bb27SAndy Grover pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope); 2477c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 247803e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 247903e98c9eSNicholas Bellinger return -EINVAL; 2480c66ac9dbSNicholas Bellinger } 2481c66ac9dbSNicholas Bellinger /* 2482c66ac9dbSNicholas Bellinger * See if we have an existing PR reservation holder pointer at 2483c66ac9dbSNicholas Bellinger * struct se_device->dev_pr_res_holder in the form struct t10_pr_registration 2484c66ac9dbSNicholas Bellinger * *pr_res_holder. 2485c66ac9dbSNicholas Bellinger */ 2486c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 2487c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 2488c66ac9dbSNicholas Bellinger if ((pr_res_holder)) { 2489c66ac9dbSNicholas Bellinger /* 2490c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2491c66ac9dbSNicholas Bellinger * 2492c66ac9dbSNicholas Bellinger * If the device server receives a PERSISTENT RESERVE OUT 2493c66ac9dbSNicholas Bellinger * command from an I_T nexus other than a persistent reservation 2494c66ac9dbSNicholas Bellinger * holder (see 5.7.10) that attempts to create a persistent 2495c66ac9dbSNicholas Bellinger * reservation when a persistent reservation already exists for 2496c66ac9dbSNicholas Bellinger * the logical unit, then the command shall be completed with 2497c66ac9dbSNicholas Bellinger * RESERVATION CONFLICT status. 2498c66ac9dbSNicholas Bellinger */ 2499c66ac9dbSNicholas Bellinger if (pr_res_holder != pr_reg) { 2500c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 25016708bb27SAndy Grover pr_err("SPC-3 PR: Attempted RESERVE from" 2502c66ac9dbSNicholas Bellinger " [%s]: %s while reservation already held by" 2503c66ac9dbSNicholas Bellinger " [%s]: %s, returning RESERVATION_CONFLICT\n", 2504e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), 2505c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, 2506e3d6f909SAndy Grover pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 2507c66ac9dbSNicholas Bellinger pr_res_holder->pr_reg_nacl->initiatorname); 2508c66ac9dbSNicholas Bellinger 2509c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2510c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 251103e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 251203e98c9eSNicholas Bellinger return -EINVAL; 2513c66ac9dbSNicholas Bellinger } 2514c66ac9dbSNicholas Bellinger /* 2515c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2516c66ac9dbSNicholas Bellinger * 2517c66ac9dbSNicholas Bellinger * If a persistent reservation holder attempts to modify the 2518c66ac9dbSNicholas Bellinger * type or scope of an existing persistent reservation, the 2519c66ac9dbSNicholas Bellinger * command shall be completed with RESERVATION CONFLICT status. 2520c66ac9dbSNicholas Bellinger */ 2521c66ac9dbSNicholas Bellinger if ((pr_res_holder->pr_res_type != type) || 2522c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_scope != scope)) { 2523c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 25246708bb27SAndy Grover pr_err("SPC-3 PR: Attempted RESERVE from" 2525c66ac9dbSNicholas Bellinger " [%s]: %s trying to change TYPE and/or SCOPE," 2526c66ac9dbSNicholas Bellinger " while reservation already held by [%s]: %s," 2527c66ac9dbSNicholas Bellinger " returning RESERVATION_CONFLICT\n", 2528e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), 2529c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, 2530e3d6f909SAndy Grover pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 2531c66ac9dbSNicholas Bellinger pr_res_holder->pr_reg_nacl->initiatorname); 2532c66ac9dbSNicholas Bellinger 2533c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2534c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 253503e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 253603e98c9eSNicholas Bellinger return -EINVAL; 2537c66ac9dbSNicholas Bellinger } 2538c66ac9dbSNicholas Bellinger /* 2539c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2540c66ac9dbSNicholas Bellinger * 2541c66ac9dbSNicholas Bellinger * If the device server receives a PERSISTENT RESERVE OUT 2542c66ac9dbSNicholas Bellinger * command with RESERVE service action where the TYPE field and 2543c66ac9dbSNicholas Bellinger * the SCOPE field contain the same values as the existing type 2544c66ac9dbSNicholas Bellinger * and scope from a persistent reservation holder, it shall not 2545c66ac9dbSNicholas Bellinger * make any change to the existing persistent reservation and 2546c66ac9dbSNicholas Bellinger * shall completethe command with GOOD status. 2547c66ac9dbSNicholas Bellinger */ 2548c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2549c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 255003e98c9eSNicholas Bellinger return 0; 2551c66ac9dbSNicholas Bellinger } 2552c66ac9dbSNicholas Bellinger /* 2553c66ac9dbSNicholas Bellinger * Otherwise, our *pr_reg becomes the PR reservation holder for said 2554c66ac9dbSNicholas Bellinger * TYPE/SCOPE. Also set the received scope and type in *pr_reg. 2555c66ac9dbSNicholas Bellinger */ 2556c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope = scope; 2557c66ac9dbSNicholas Bellinger pr_reg->pr_res_type = type; 2558c66ac9dbSNicholas Bellinger pr_reg->pr_res_holder = 1; 2559c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = pr_reg; 2560c66ac9dbSNicholas Bellinger prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], 2561c66ac9dbSNicholas Bellinger PR_REG_ISID_ID_LEN); 2562c66ac9dbSNicholas Bellinger 25636708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: RESERVE created new" 2564c66ac9dbSNicholas Bellinger " reservation holder TYPE: %s ALL_TG_PT: %d\n", 2565e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), core_scsi3_pr_dump_type(type), 2566c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); 25676708bb27SAndy Grover pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n", 2568e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), 2569c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, 2570c66ac9dbSNicholas Bellinger (prf_isid) ? &i_buf[0] : ""); 2571c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2572c66ac9dbSNicholas Bellinger 2573c66ac9dbSNicholas Bellinger if (pr_tmpl->pr_aptpl_active) { 25745951146dSAndy Grover ret = core_scsi3_update_and_write_aptpl(cmd->se_dev, 2575c66ac9dbSNicholas Bellinger &pr_reg->pr_aptpl_buf[0], 2576c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_buf_len); 25776708bb27SAndy Grover if (!ret) 25786708bb27SAndy Grover pr_debug("SPC-3 PR: Updated APTPL metadata" 2579c66ac9dbSNicholas Bellinger " for RESERVE\n"); 2580c66ac9dbSNicholas Bellinger } 2581c66ac9dbSNicholas Bellinger 2582c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2583c66ac9dbSNicholas Bellinger return 0; 2584c66ac9dbSNicholas Bellinger } 2585c66ac9dbSNicholas Bellinger 2586c66ac9dbSNicholas Bellinger static int core_scsi3_emulate_pro_reserve( 2587c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 2588c66ac9dbSNicholas Bellinger int type, 2589c66ac9dbSNicholas Bellinger int scope, 2590c66ac9dbSNicholas Bellinger u64 res_key) 2591c66ac9dbSNicholas Bellinger { 2592c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 2593c66ac9dbSNicholas Bellinger int ret = 0; 2594c66ac9dbSNicholas Bellinger 2595c66ac9dbSNicholas Bellinger switch (type) { 2596c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE: 2597c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS: 2598c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: 2599c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: 2600c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: 2601c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: 2602c66ac9dbSNicholas Bellinger ret = core_scsi3_pro_reserve(cmd, dev, type, scope, res_key); 2603c66ac9dbSNicholas Bellinger break; 2604c66ac9dbSNicholas Bellinger default: 26056708bb27SAndy Grover pr_err("SPC-3 PR: Unknown Service Action RESERVE Type:" 2606c66ac9dbSNicholas Bellinger " 0x%02x\n", type); 260703e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; 260803e98c9eSNicholas Bellinger return -EINVAL; 2609c66ac9dbSNicholas Bellinger } 2610c66ac9dbSNicholas Bellinger 2611c66ac9dbSNicholas Bellinger return ret; 2612c66ac9dbSNicholas Bellinger } 2613c66ac9dbSNicholas Bellinger 2614c66ac9dbSNicholas Bellinger /* 2615c66ac9dbSNicholas Bellinger * Called with struct se_device->dev_reservation_lock held. 2616c66ac9dbSNicholas Bellinger */ 2617c66ac9dbSNicholas Bellinger static void __core_scsi3_complete_pro_release( 2618c66ac9dbSNicholas Bellinger struct se_device *dev, 2619c66ac9dbSNicholas Bellinger struct se_node_acl *se_nacl, 2620c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 2621c66ac9dbSNicholas Bellinger int explict) 2622c66ac9dbSNicholas Bellinger { 2623c66ac9dbSNicholas Bellinger struct target_core_fabric_ops *tfo = se_nacl->se_tpg->se_tpg_tfo; 2624c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 2625c66ac9dbSNicholas Bellinger int prf_isid; 2626c66ac9dbSNicholas Bellinger 2627c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 2628c66ac9dbSNicholas Bellinger prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], 2629c66ac9dbSNicholas Bellinger PR_REG_ISID_ID_LEN); 2630c66ac9dbSNicholas Bellinger /* 2631c66ac9dbSNicholas Bellinger * Go ahead and release the current PR reservation holder. 2632c66ac9dbSNicholas Bellinger */ 2633c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = NULL; 2634c66ac9dbSNicholas Bellinger 26356708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: %s RELEASE cleared" 2636c66ac9dbSNicholas Bellinger " reservation holder TYPE: %s ALL_TG_PT: %d\n", 2637c66ac9dbSNicholas Bellinger tfo->get_fabric_name(), (explict) ? "explict" : "implict", 2638c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg->pr_res_type), 2639c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); 26406708bb27SAndy Grover pr_debug("SPC-3 PR [%s] RELEASE Node: %s%s\n", 2641c66ac9dbSNicholas Bellinger tfo->get_fabric_name(), se_nacl->initiatorname, 2642c66ac9dbSNicholas Bellinger (prf_isid) ? &i_buf[0] : ""); 2643c66ac9dbSNicholas Bellinger /* 2644c66ac9dbSNicholas Bellinger * Clear TYPE and SCOPE for the next PROUT Service Action: RESERVE 2645c66ac9dbSNicholas Bellinger */ 2646c66ac9dbSNicholas Bellinger pr_reg->pr_res_holder = pr_reg->pr_res_type = pr_reg->pr_res_scope = 0; 2647c66ac9dbSNicholas Bellinger } 2648c66ac9dbSNicholas Bellinger 2649c66ac9dbSNicholas Bellinger static int core_scsi3_emulate_pro_release( 2650c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 2651c66ac9dbSNicholas Bellinger int type, 2652c66ac9dbSNicholas Bellinger int scope, 2653c66ac9dbSNicholas Bellinger u64 res_key) 2654c66ac9dbSNicholas Bellinger { 2655c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 2656e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 2657e3d6f909SAndy Grover struct se_lun *se_lun = cmd->se_lun; 2658c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_res_holder; 2659e3d6f909SAndy Grover struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; 2660c66ac9dbSNicholas Bellinger int ret, all_reg = 0; 2661c66ac9dbSNicholas Bellinger 26626708bb27SAndy Grover if (!se_sess || !se_lun) { 26636708bb27SAndy Grover pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); 266403e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 266503e98c9eSNicholas Bellinger return -EINVAL; 2666c66ac9dbSNicholas Bellinger } 2667c66ac9dbSNicholas Bellinger /* 2668c66ac9dbSNicholas Bellinger * Locate the existing *pr_reg via struct se_node_acl pointers 2669c66ac9dbSNicholas Bellinger */ 2670c66ac9dbSNicholas Bellinger pr_reg = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess); 26716708bb27SAndy Grover if (!pr_reg) { 26726708bb27SAndy Grover pr_err("SPC-3 PR: Unable to locate" 2673c66ac9dbSNicholas Bellinger " PR_REGISTERED *pr_reg for RELEASE\n"); 267403e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 267503e98c9eSNicholas Bellinger return -EINVAL; 2676c66ac9dbSNicholas Bellinger } 2677c66ac9dbSNicholas Bellinger /* 2678c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.11.2 Releasing: 2679c66ac9dbSNicholas Bellinger * 2680c66ac9dbSNicholas Bellinger * If there is no persistent reservation or in response to a persistent 2681c66ac9dbSNicholas Bellinger * reservation release request from a registered I_T nexus that is not a 2682c66ac9dbSNicholas Bellinger * persistent reservation holder (see 5.7.10), the device server shall 2683c66ac9dbSNicholas Bellinger * do the following: 2684c66ac9dbSNicholas Bellinger * 2685c66ac9dbSNicholas Bellinger * a) Not release the persistent reservation, if any; 2686c66ac9dbSNicholas Bellinger * b) Not remove any registrations; and 2687c66ac9dbSNicholas Bellinger * c) Complete the command with GOOD status. 2688c66ac9dbSNicholas Bellinger */ 2689c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 2690c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 26916708bb27SAndy Grover if (!pr_res_holder) { 2692c66ac9dbSNicholas Bellinger /* 2693c66ac9dbSNicholas Bellinger * No persistent reservation, return GOOD status. 2694c66ac9dbSNicholas Bellinger */ 2695c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2696c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 269703e98c9eSNicholas Bellinger return 0; 2698c66ac9dbSNicholas Bellinger } 2699c66ac9dbSNicholas Bellinger if ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 2700c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) 2701c66ac9dbSNicholas Bellinger all_reg = 1; 2702c66ac9dbSNicholas Bellinger 2703c66ac9dbSNicholas Bellinger if ((all_reg == 0) && (pr_res_holder != pr_reg)) { 2704c66ac9dbSNicholas Bellinger /* 2705c66ac9dbSNicholas Bellinger * Non 'All Registrants' PR Type cases.. 2706c66ac9dbSNicholas Bellinger * Release request from a registered I_T nexus that is not a 2707c66ac9dbSNicholas Bellinger * persistent reservation holder. return GOOD status. 2708c66ac9dbSNicholas Bellinger */ 2709c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2710c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 271103e98c9eSNicholas Bellinger return 0; 2712c66ac9dbSNicholas Bellinger } 2713c66ac9dbSNicholas Bellinger /* 2714c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.11.2 Releasing: 2715c66ac9dbSNicholas Bellinger * 2716c66ac9dbSNicholas Bellinger * Only the persistent reservation holder (see 5.7.10) is allowed to 2717c66ac9dbSNicholas Bellinger * release a persistent reservation. 2718c66ac9dbSNicholas Bellinger * 2719c66ac9dbSNicholas Bellinger * An application client releases the persistent reservation by issuing 2720c66ac9dbSNicholas Bellinger * a PERSISTENT RESERVE OUT command with RELEASE service action through 2721c66ac9dbSNicholas Bellinger * an I_T nexus that is a persistent reservation holder with the 2722c66ac9dbSNicholas Bellinger * following parameters: 2723c66ac9dbSNicholas Bellinger * 2724c66ac9dbSNicholas Bellinger * a) RESERVATION KEY field set to the value of the reservation key 2725c66ac9dbSNicholas Bellinger * that is registered with the logical unit for the I_T nexus; 2726c66ac9dbSNicholas Bellinger */ 2727c66ac9dbSNicholas Bellinger if (res_key != pr_reg->pr_res_key) { 27286708bb27SAndy Grover pr_err("SPC-3 PR RELEASE: Received res_key: 0x%016Lx" 2729c66ac9dbSNicholas Bellinger " does not match existing SA REGISTER res_key:" 2730c66ac9dbSNicholas Bellinger " 0x%016Lx\n", res_key, pr_reg->pr_res_key); 2731c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2732c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 273303e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 273403e98c9eSNicholas Bellinger return -EINVAL; 2735c66ac9dbSNicholas Bellinger } 2736c66ac9dbSNicholas Bellinger /* 2737c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.11.2 Releasing and above: 2738c66ac9dbSNicholas Bellinger * 2739c66ac9dbSNicholas Bellinger * b) TYPE field and SCOPE field set to match the persistent 2740c66ac9dbSNicholas Bellinger * reservation being released. 2741c66ac9dbSNicholas Bellinger */ 2742c66ac9dbSNicholas Bellinger if ((pr_res_holder->pr_res_type != type) || 2743c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_scope != scope)) { 2744c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 27456708bb27SAndy Grover pr_err("SPC-3 PR RELEASE: Attempted to release" 2746c66ac9dbSNicholas Bellinger " reservation from [%s]: %s with different TYPE " 2747c66ac9dbSNicholas Bellinger "and/or SCOPE while reservation already held by" 2748c66ac9dbSNicholas Bellinger " [%s]: %s, returning RESERVATION_CONFLICT\n", 2749e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), 2750c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, 2751e3d6f909SAndy Grover pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 2752c66ac9dbSNicholas Bellinger pr_res_holder->pr_reg_nacl->initiatorname); 2753c66ac9dbSNicholas Bellinger 2754c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2755c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 275603e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 275703e98c9eSNicholas Bellinger return -EINVAL; 2758c66ac9dbSNicholas Bellinger } 2759c66ac9dbSNicholas Bellinger /* 2760c66ac9dbSNicholas Bellinger * In response to a persistent reservation release request from the 2761c66ac9dbSNicholas Bellinger * persistent reservation holder the device server shall perform a 2762c66ac9dbSNicholas Bellinger * release by doing the following as an uninterrupted series of actions: 2763c66ac9dbSNicholas Bellinger * a) Release the persistent reservation; 2764c66ac9dbSNicholas Bellinger * b) Not remove any registration(s); 2765c66ac9dbSNicholas Bellinger * c) If the released persistent reservation is a registrants only type 2766c66ac9dbSNicholas Bellinger * or all registrants type persistent reservation, 2767c66ac9dbSNicholas Bellinger * the device server shall establish a unit attention condition for 2768c66ac9dbSNicholas Bellinger * the initiator port associated with every regis- 2769c66ac9dbSNicholas Bellinger * tered I_T nexus other than I_T nexus on which the PERSISTENT 2770c66ac9dbSNicholas Bellinger * RESERVE OUT command with RELEASE service action was received, 2771c66ac9dbSNicholas Bellinger * with the additional sense code set to RESERVATIONS RELEASED; and 2772c66ac9dbSNicholas Bellinger * d) If the persistent reservation is of any other type, the device 2773c66ac9dbSNicholas Bellinger * server shall not establish a unit attention condition. 2774c66ac9dbSNicholas Bellinger */ 2775c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, se_sess->se_node_acl, 2776c66ac9dbSNicholas Bellinger pr_reg, 1); 2777c66ac9dbSNicholas Bellinger 2778c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2779c66ac9dbSNicholas Bellinger 2780c66ac9dbSNicholas Bellinger if ((type != PR_TYPE_WRITE_EXCLUSIVE_REGONLY) && 2781c66ac9dbSNicholas Bellinger (type != PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) && 2782c66ac9dbSNicholas Bellinger (type != PR_TYPE_WRITE_EXCLUSIVE_ALLREG) && 2783c66ac9dbSNicholas Bellinger (type != PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { 2784c66ac9dbSNicholas Bellinger /* 2785c66ac9dbSNicholas Bellinger * If no UNIT ATTENTION conditions will be established for 2786c66ac9dbSNicholas Bellinger * PR_TYPE_WRITE_EXCLUSIVE or PR_TYPE_EXCLUSIVE_ACCESS 2787c66ac9dbSNicholas Bellinger * go ahead and check for APTPL=1 update+write below 2788c66ac9dbSNicholas Bellinger */ 2789c66ac9dbSNicholas Bellinger goto write_aptpl; 2790c66ac9dbSNicholas Bellinger } 2791c66ac9dbSNicholas Bellinger 2792c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 2793c66ac9dbSNicholas Bellinger list_for_each_entry(pr_reg_p, &pr_tmpl->registration_list, 2794c66ac9dbSNicholas Bellinger pr_reg_list) { 2795c66ac9dbSNicholas Bellinger /* 2796c66ac9dbSNicholas Bellinger * Do not establish a UNIT ATTENTION condition 2797c66ac9dbSNicholas Bellinger * for the calling I_T Nexus 2798c66ac9dbSNicholas Bellinger */ 2799c66ac9dbSNicholas Bellinger if (pr_reg_p == pr_reg) 2800c66ac9dbSNicholas Bellinger continue; 2801c66ac9dbSNicholas Bellinger 2802c66ac9dbSNicholas Bellinger core_scsi3_ua_allocate(pr_reg_p->pr_reg_nacl, 2803c66ac9dbSNicholas Bellinger pr_reg_p->pr_res_mapped_lun, 2804c66ac9dbSNicholas Bellinger 0x2A, ASCQ_2AH_RESERVATIONS_RELEASED); 2805c66ac9dbSNicholas Bellinger } 2806c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 2807c66ac9dbSNicholas Bellinger 2808c66ac9dbSNicholas Bellinger write_aptpl: 2809c66ac9dbSNicholas Bellinger if (pr_tmpl->pr_aptpl_active) { 28105951146dSAndy Grover ret = core_scsi3_update_and_write_aptpl(cmd->se_dev, 2811c66ac9dbSNicholas Bellinger &pr_reg->pr_aptpl_buf[0], 2812c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_buf_len); 28136708bb27SAndy Grover if (!ret) 28146708bb27SAndy Grover pr_debug("SPC-3 PR: Updated APTPL metadata for RELEASE\n"); 2815c66ac9dbSNicholas Bellinger } 2816c66ac9dbSNicholas Bellinger 2817c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2818c66ac9dbSNicholas Bellinger return 0; 2819c66ac9dbSNicholas Bellinger } 2820c66ac9dbSNicholas Bellinger 2821c66ac9dbSNicholas Bellinger static int core_scsi3_emulate_pro_clear( 2822c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 2823c66ac9dbSNicholas Bellinger u64 res_key) 2824c66ac9dbSNicholas Bellinger { 2825c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 2826c66ac9dbSNicholas Bellinger struct se_node_acl *pr_reg_nacl; 2827e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 2828e3d6f909SAndy Grover struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; 2829c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder; 2830c66ac9dbSNicholas Bellinger u32 pr_res_mapped_lun = 0; 2831c66ac9dbSNicholas Bellinger int calling_it_nexus = 0; 2832c66ac9dbSNicholas Bellinger /* 2833c66ac9dbSNicholas Bellinger * Locate the existing *pr_reg via struct se_node_acl pointers 2834c66ac9dbSNicholas Bellinger */ 28355951146dSAndy Grover pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, 2836c66ac9dbSNicholas Bellinger se_sess->se_node_acl, se_sess); 28376708bb27SAndy Grover if (!pr_reg_n) { 28386708bb27SAndy Grover pr_err("SPC-3 PR: Unable to locate" 2839c66ac9dbSNicholas Bellinger " PR_REGISTERED *pr_reg for CLEAR\n"); 284003e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 284103e98c9eSNicholas Bellinger return -EINVAL; 2842c66ac9dbSNicholas Bellinger } 2843c66ac9dbSNicholas Bellinger /* 2844c66ac9dbSNicholas Bellinger * From spc4r17 section 5.7.11.6, Clearing: 2845c66ac9dbSNicholas Bellinger * 2846c66ac9dbSNicholas Bellinger * Any application client may release the persistent reservation and 2847c66ac9dbSNicholas Bellinger * remove all registrations from a device server by issuing a 2848c66ac9dbSNicholas Bellinger * PERSISTENT RESERVE OUT command with CLEAR service action through a 2849c66ac9dbSNicholas Bellinger * registered I_T nexus with the following parameter: 2850c66ac9dbSNicholas Bellinger * 2851c66ac9dbSNicholas Bellinger * a) RESERVATION KEY field set to the value of the reservation key 2852c66ac9dbSNicholas Bellinger * that is registered with the logical unit for the I_T nexus. 2853c66ac9dbSNicholas Bellinger */ 2854c66ac9dbSNicholas Bellinger if (res_key != pr_reg_n->pr_res_key) { 28556708bb27SAndy Grover pr_err("SPC-3 PR REGISTER: Received" 2856c66ac9dbSNicholas Bellinger " res_key: 0x%016Lx does not match" 2857c66ac9dbSNicholas Bellinger " existing SA REGISTER res_key:" 2858c66ac9dbSNicholas Bellinger " 0x%016Lx\n", res_key, pr_reg_n->pr_res_key); 2859c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 286003e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 286103e98c9eSNicholas Bellinger return -EINVAL; 2862c66ac9dbSNicholas Bellinger } 2863c66ac9dbSNicholas Bellinger /* 2864c66ac9dbSNicholas Bellinger * a) Release the persistent reservation, if any; 2865c66ac9dbSNicholas Bellinger */ 2866c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 2867c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 2868c66ac9dbSNicholas Bellinger if (pr_res_holder) { 2869c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 2870c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, pr_res_nacl, 2871c66ac9dbSNicholas Bellinger pr_res_holder, 0); 2872c66ac9dbSNicholas Bellinger } 2873c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2874c66ac9dbSNicholas Bellinger /* 2875c66ac9dbSNicholas Bellinger * b) Remove all registration(s) (see spc4r17 5.7.7); 2876c66ac9dbSNicholas Bellinger */ 2877c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 2878c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 2879c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 2880c66ac9dbSNicholas Bellinger 2881c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 2882c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 2883c66ac9dbSNicholas Bellinger pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; 2884c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, NULL, 2885c66ac9dbSNicholas Bellinger calling_it_nexus); 2886c66ac9dbSNicholas Bellinger /* 2887c66ac9dbSNicholas Bellinger * e) Establish a unit attention condition for the initiator 2888c66ac9dbSNicholas Bellinger * port associated with every registered I_T nexus other 2889c66ac9dbSNicholas Bellinger * than the I_T nexus on which the PERSISTENT RESERVE OUT 2890c66ac9dbSNicholas Bellinger * command with CLEAR service action was received, with the 2891c66ac9dbSNicholas Bellinger * additional sense code set to RESERVATIONS PREEMPTED. 2892c66ac9dbSNicholas Bellinger */ 28936708bb27SAndy Grover if (!calling_it_nexus) 2894c66ac9dbSNicholas Bellinger core_scsi3_ua_allocate(pr_reg_nacl, pr_res_mapped_lun, 2895c66ac9dbSNicholas Bellinger 0x2A, ASCQ_2AH_RESERVATIONS_PREEMPTED); 2896c66ac9dbSNicholas Bellinger } 2897c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 2898c66ac9dbSNicholas Bellinger 28996708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: CLEAR complete\n", 2900e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name()); 2901c66ac9dbSNicholas Bellinger 2902c66ac9dbSNicholas Bellinger if (pr_tmpl->pr_aptpl_active) { 29035951146dSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, NULL, 0); 29046708bb27SAndy Grover pr_debug("SPC-3 PR: Updated APTPL metadata" 2905c66ac9dbSNicholas Bellinger " for CLEAR\n"); 2906c66ac9dbSNicholas Bellinger } 2907c66ac9dbSNicholas Bellinger 2908c66ac9dbSNicholas Bellinger core_scsi3_pr_generation(dev); 2909c66ac9dbSNicholas Bellinger return 0; 2910c66ac9dbSNicholas Bellinger } 2911c66ac9dbSNicholas Bellinger 2912c66ac9dbSNicholas Bellinger /* 2913c66ac9dbSNicholas Bellinger * Called with struct se_device->dev_reservation_lock held. 2914c66ac9dbSNicholas Bellinger */ 2915c66ac9dbSNicholas Bellinger static void __core_scsi3_complete_pro_preempt( 2916c66ac9dbSNicholas Bellinger struct se_device *dev, 2917c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 2918c66ac9dbSNicholas Bellinger struct list_head *preempt_and_abort_list, 2919c66ac9dbSNicholas Bellinger int type, 2920c66ac9dbSNicholas Bellinger int scope, 2921c66ac9dbSNicholas Bellinger int abort) 2922c66ac9dbSNicholas Bellinger { 2923c66ac9dbSNicholas Bellinger struct se_node_acl *nacl = pr_reg->pr_reg_nacl; 2924c66ac9dbSNicholas Bellinger struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; 2925c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 2926c66ac9dbSNicholas Bellinger int prf_isid; 2927c66ac9dbSNicholas Bellinger 2928c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 2929c66ac9dbSNicholas Bellinger prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], 2930c66ac9dbSNicholas Bellinger PR_REG_ISID_ID_LEN); 2931c66ac9dbSNicholas Bellinger /* 2932c66ac9dbSNicholas Bellinger * Do an implict RELEASE of the existing reservation. 2933c66ac9dbSNicholas Bellinger */ 2934c66ac9dbSNicholas Bellinger if (dev->dev_pr_res_holder) 2935c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, nacl, 2936c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder, 0); 2937c66ac9dbSNicholas Bellinger 2938c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = pr_reg; 2939c66ac9dbSNicholas Bellinger pr_reg->pr_res_holder = 1; 2940c66ac9dbSNicholas Bellinger pr_reg->pr_res_type = type; 2941c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope = scope; 2942c66ac9dbSNicholas Bellinger 29436708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: PREEMPT%s created new" 2944c66ac9dbSNicholas Bellinger " reservation holder TYPE: %s ALL_TG_PT: %d\n", 2945c66ac9dbSNicholas Bellinger tfo->get_fabric_name(), (abort) ? "_AND_ABORT" : "", 2946c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(type), 2947c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); 29486708bb27SAndy Grover pr_debug("SPC-3 PR [%s] PREEMPT%s from Node: %s%s\n", 2949c66ac9dbSNicholas Bellinger tfo->get_fabric_name(), (abort) ? "_AND_ABORT" : "", 2950c66ac9dbSNicholas Bellinger nacl->initiatorname, (prf_isid) ? &i_buf[0] : ""); 2951c66ac9dbSNicholas Bellinger /* 2952c66ac9dbSNicholas Bellinger * For PREEMPT_AND_ABORT, add the preempting reservation's 2953c66ac9dbSNicholas Bellinger * struct t10_pr_registration to the list that will be compared 2954c66ac9dbSNicholas Bellinger * against received CDBs.. 2955c66ac9dbSNicholas Bellinger */ 2956c66ac9dbSNicholas Bellinger if (preempt_and_abort_list) 2957c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg->pr_reg_abort_list, 2958c66ac9dbSNicholas Bellinger preempt_and_abort_list); 2959c66ac9dbSNicholas Bellinger } 2960c66ac9dbSNicholas Bellinger 2961c66ac9dbSNicholas Bellinger static void core_scsi3_release_preempt_and_abort( 2962c66ac9dbSNicholas Bellinger struct list_head *preempt_and_abort_list, 2963c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg_holder) 2964c66ac9dbSNicholas Bellinger { 2965c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp; 2966c66ac9dbSNicholas Bellinger 2967c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, preempt_and_abort_list, 2968c66ac9dbSNicholas Bellinger pr_reg_abort_list) { 2969c66ac9dbSNicholas Bellinger 2970c66ac9dbSNicholas Bellinger list_del(&pr_reg->pr_reg_abort_list); 2971c66ac9dbSNicholas Bellinger if (pr_reg_holder == pr_reg) 2972c66ac9dbSNicholas Bellinger continue; 2973c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_holder) { 29746708bb27SAndy Grover pr_warn("pr_reg->pr_res_holder still set\n"); 2975c66ac9dbSNicholas Bellinger continue; 2976c66ac9dbSNicholas Bellinger } 2977c66ac9dbSNicholas Bellinger 2978c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve = NULL; 2979c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = NULL; 2980c66ac9dbSNicholas Bellinger kfree(pr_reg->pr_aptpl_buf); 2981c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 2982c66ac9dbSNicholas Bellinger } 2983c66ac9dbSNicholas Bellinger } 2984c66ac9dbSNicholas Bellinger 2985c66ac9dbSNicholas Bellinger static int core_scsi3_pro_preempt( 2986c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 2987c66ac9dbSNicholas Bellinger int type, 2988c66ac9dbSNicholas Bellinger int scope, 2989c66ac9dbSNicholas Bellinger u64 res_key, 2990c66ac9dbSNicholas Bellinger u64 sa_res_key, 2991c66ac9dbSNicholas Bellinger int abort) 2992c66ac9dbSNicholas Bellinger { 29935951146dSAndy Grover struct se_device *dev = cmd->se_dev; 2994c66ac9dbSNicholas Bellinger struct se_dev_entry *se_deve; 2995c66ac9dbSNicholas Bellinger struct se_node_acl *pr_reg_nacl; 2996e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 2997c66ac9dbSNicholas Bellinger struct list_head preempt_and_abort_list; 2998c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder; 2999e3d6f909SAndy Grover struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; 3000c66ac9dbSNicholas Bellinger u32 pr_res_mapped_lun = 0; 3001c66ac9dbSNicholas Bellinger int all_reg = 0, calling_it_nexus = 0, released_regs = 0; 3002c66ac9dbSNicholas Bellinger int prh_type = 0, prh_scope = 0, ret; 3003c66ac9dbSNicholas Bellinger 300403e98c9eSNicholas Bellinger if (!se_sess) { 300503e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 300603e98c9eSNicholas Bellinger return -EINVAL; 300703e98c9eSNicholas Bellinger } 3008c66ac9dbSNicholas Bellinger 3009c66ac9dbSNicholas Bellinger se_deve = &se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; 30105951146dSAndy Grover pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, 3011c66ac9dbSNicholas Bellinger se_sess); 30126708bb27SAndy Grover if (!pr_reg_n) { 30136708bb27SAndy Grover pr_err("SPC-3 PR: Unable to locate" 3014c66ac9dbSNicholas Bellinger " PR_REGISTERED *pr_reg for PREEMPT%s\n", 3015c66ac9dbSNicholas Bellinger (abort) ? "_AND_ABORT" : ""); 301603e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 301703e98c9eSNicholas Bellinger return -EINVAL; 3018c66ac9dbSNicholas Bellinger } 3019c66ac9dbSNicholas Bellinger if (pr_reg_n->pr_res_key != res_key) { 3020c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 302103e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 302203e98c9eSNicholas Bellinger return -EINVAL; 3023c66ac9dbSNicholas Bellinger } 3024c66ac9dbSNicholas Bellinger if (scope != PR_SCOPE_LU_SCOPE) { 30256708bb27SAndy Grover pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope); 3026c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 302703e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 302803e98c9eSNicholas Bellinger return -EINVAL; 3029c66ac9dbSNicholas Bellinger } 3030c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&preempt_and_abort_list); 3031c66ac9dbSNicholas Bellinger 3032c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 3033c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 3034c66ac9dbSNicholas Bellinger if (pr_res_holder && 3035c66ac9dbSNicholas Bellinger ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 3036c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG))) 3037c66ac9dbSNicholas Bellinger all_reg = 1; 3038c66ac9dbSNicholas Bellinger 30396708bb27SAndy Grover if (!all_reg && !sa_res_key) { 3040c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3041c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 304203e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 304303e98c9eSNicholas Bellinger return -EINVAL; 3044c66ac9dbSNicholas Bellinger } 3045c66ac9dbSNicholas Bellinger /* 3046c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.11.4.4 Removing Registrations: 3047c66ac9dbSNicholas Bellinger * 3048c66ac9dbSNicholas Bellinger * If the SERVICE ACTION RESERVATION KEY field does not identify a 3049c66ac9dbSNicholas Bellinger * persistent reservation holder or there is no persistent reservation 3050c66ac9dbSNicholas Bellinger * holder (i.e., there is no persistent reservation), then the device 3051c66ac9dbSNicholas Bellinger * server shall perform a preempt by doing the following in an 3052c66ac9dbSNicholas Bellinger * uninterrupted series of actions. (See below..) 3053c66ac9dbSNicholas Bellinger */ 30546708bb27SAndy Grover if (!pr_res_holder || (pr_res_holder->pr_res_key != sa_res_key)) { 3055c66ac9dbSNicholas Bellinger /* 3056c66ac9dbSNicholas Bellinger * No existing or SA Reservation Key matching reservations.. 3057c66ac9dbSNicholas Bellinger * 3058c66ac9dbSNicholas Bellinger * PROUT SA PREEMPT with All Registrant type reservations are 3059c66ac9dbSNicholas Bellinger * allowed to be processed without a matching SA Reservation Key 3060c66ac9dbSNicholas Bellinger */ 3061c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 3062c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 3063c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 3064c66ac9dbSNicholas Bellinger /* 3065c66ac9dbSNicholas Bellinger * Removing of registrations in non all registrants 3066c66ac9dbSNicholas Bellinger * type reservations without a matching SA reservation 3067c66ac9dbSNicholas Bellinger * key. 3068c66ac9dbSNicholas Bellinger * 3069c66ac9dbSNicholas Bellinger * a) Remove the registrations for all I_T nexuses 3070c66ac9dbSNicholas Bellinger * specified by the SERVICE ACTION RESERVATION KEY 3071c66ac9dbSNicholas Bellinger * field; 3072c66ac9dbSNicholas Bellinger * b) Ignore the contents of the SCOPE and TYPE fields; 3073c66ac9dbSNicholas Bellinger * c) Process tasks as defined in 5.7.1; and 3074c66ac9dbSNicholas Bellinger * d) Establish a unit attention condition for the 3075c66ac9dbSNicholas Bellinger * initiator port associated with every I_T nexus 3076c66ac9dbSNicholas Bellinger * that lost its registration other than the I_T 3077c66ac9dbSNicholas Bellinger * nexus on which the PERSISTENT RESERVE OUT command 3078c66ac9dbSNicholas Bellinger * was received, with the additional sense code set 3079c66ac9dbSNicholas Bellinger * to REGISTRATIONS PREEMPTED. 3080c66ac9dbSNicholas Bellinger */ 30816708bb27SAndy Grover if (!all_reg) { 3082c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_key != sa_res_key) 3083c66ac9dbSNicholas Bellinger continue; 3084c66ac9dbSNicholas Bellinger 3085c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 3086c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 3087c66ac9dbSNicholas Bellinger pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; 3088c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, 3089c66ac9dbSNicholas Bellinger (abort) ? &preempt_and_abort_list : 3090c66ac9dbSNicholas Bellinger NULL, calling_it_nexus); 3091c66ac9dbSNicholas Bellinger released_regs++; 3092c66ac9dbSNicholas Bellinger } else { 3093c66ac9dbSNicholas Bellinger /* 3094c66ac9dbSNicholas Bellinger * Case for any existing all registrants type 3095c66ac9dbSNicholas Bellinger * reservation, follow logic in spc4r17 section 3096c66ac9dbSNicholas Bellinger * 5.7.11.4 Preempting, Table 52 and Figure 7. 3097c66ac9dbSNicholas Bellinger * 3098c66ac9dbSNicholas Bellinger * For a ZERO SA Reservation key, release 3099c66ac9dbSNicholas Bellinger * all other registrations and do an implict 3100c66ac9dbSNicholas Bellinger * release of active persistent reservation. 3101c66ac9dbSNicholas Bellinger * 3102c66ac9dbSNicholas Bellinger * For a non-ZERO SA Reservation key, only 3103c66ac9dbSNicholas Bellinger * release the matching reservation key from 3104c66ac9dbSNicholas Bellinger * registrations. 3105c66ac9dbSNicholas Bellinger */ 3106c66ac9dbSNicholas Bellinger if ((sa_res_key) && 3107c66ac9dbSNicholas Bellinger (pr_reg->pr_res_key != sa_res_key)) 3108c66ac9dbSNicholas Bellinger continue; 3109c66ac9dbSNicholas Bellinger 3110c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 3111c66ac9dbSNicholas Bellinger if (calling_it_nexus) 3112c66ac9dbSNicholas Bellinger continue; 3113c66ac9dbSNicholas Bellinger 3114c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 3115c66ac9dbSNicholas Bellinger pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; 3116c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, 3117c66ac9dbSNicholas Bellinger (abort) ? &preempt_and_abort_list : 3118c66ac9dbSNicholas Bellinger NULL, 0); 3119c66ac9dbSNicholas Bellinger released_regs++; 3120c66ac9dbSNicholas Bellinger } 31216708bb27SAndy Grover if (!calling_it_nexus) 3122c66ac9dbSNicholas Bellinger core_scsi3_ua_allocate(pr_reg_nacl, 3123c66ac9dbSNicholas Bellinger pr_res_mapped_lun, 0x2A, 31249e08e34eSMarco Sanvido ASCQ_2AH_REGISTRATIONS_PREEMPTED); 3125c66ac9dbSNicholas Bellinger } 3126c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 3127c66ac9dbSNicholas Bellinger /* 3128c66ac9dbSNicholas Bellinger * If a PERSISTENT RESERVE OUT with a PREEMPT service action or 3129c66ac9dbSNicholas Bellinger * a PREEMPT AND ABORT service action sets the SERVICE ACTION 3130c66ac9dbSNicholas Bellinger * RESERVATION KEY field to a value that does not match any 3131c66ac9dbSNicholas Bellinger * registered reservation key, then the device server shall 3132c66ac9dbSNicholas Bellinger * complete the command with RESERVATION CONFLICT status. 3133c66ac9dbSNicholas Bellinger */ 31346708bb27SAndy Grover if (!released_regs) { 3135c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3136c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 313703e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 313803e98c9eSNicholas Bellinger return -EINVAL; 3139c66ac9dbSNicholas Bellinger } 3140c66ac9dbSNicholas Bellinger /* 3141c66ac9dbSNicholas Bellinger * For an existing all registrants type reservation 3142c66ac9dbSNicholas Bellinger * with a zero SA rservation key, preempt the existing 3143c66ac9dbSNicholas Bellinger * reservation with the new PR type and scope. 3144c66ac9dbSNicholas Bellinger */ 3145c66ac9dbSNicholas Bellinger if (pr_res_holder && all_reg && !(sa_res_key)) { 3146c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_preempt(dev, pr_reg_n, 3147c66ac9dbSNicholas Bellinger (abort) ? &preempt_and_abort_list : NULL, 3148c66ac9dbSNicholas Bellinger type, scope, abort); 3149c66ac9dbSNicholas Bellinger 3150c66ac9dbSNicholas Bellinger if (abort) 3151c66ac9dbSNicholas Bellinger core_scsi3_release_preempt_and_abort( 3152c66ac9dbSNicholas Bellinger &preempt_and_abort_list, pr_reg_n); 3153c66ac9dbSNicholas Bellinger } 3154c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3155c66ac9dbSNicholas Bellinger 3156c66ac9dbSNicholas Bellinger if (pr_tmpl->pr_aptpl_active) { 31575951146dSAndy Grover ret = core_scsi3_update_and_write_aptpl(cmd->se_dev, 3158c66ac9dbSNicholas Bellinger &pr_reg_n->pr_aptpl_buf[0], 3159c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_buf_len); 31606708bb27SAndy Grover if (!ret) 31616708bb27SAndy Grover pr_debug("SPC-3 PR: Updated APTPL" 3162c66ac9dbSNicholas Bellinger " metadata for PREEMPT%s\n", (abort) ? 3163c66ac9dbSNicholas Bellinger "_AND_ABORT" : ""); 3164c66ac9dbSNicholas Bellinger } 3165c66ac9dbSNicholas Bellinger 3166c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 31675951146dSAndy Grover core_scsi3_pr_generation(cmd->se_dev); 3168c66ac9dbSNicholas Bellinger return 0; 3169c66ac9dbSNicholas Bellinger } 3170c66ac9dbSNicholas Bellinger /* 3171c66ac9dbSNicholas Bellinger * The PREEMPTing SA reservation key matches that of the 3172c66ac9dbSNicholas Bellinger * existing persistent reservation, first, we check if 3173c66ac9dbSNicholas Bellinger * we are preempting our own reservation. 3174c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.11.4.3 Preempting 3175c66ac9dbSNicholas Bellinger * persistent reservations and registration handling 3176c66ac9dbSNicholas Bellinger * 3177c66ac9dbSNicholas Bellinger * If an all registrants persistent reservation is not 3178c66ac9dbSNicholas Bellinger * present, it is not an error for the persistent 3179c66ac9dbSNicholas Bellinger * reservation holder to preempt itself (i.e., a 3180c66ac9dbSNicholas Bellinger * PERSISTENT RESERVE OUT with a PREEMPT service action 3181c66ac9dbSNicholas Bellinger * or a PREEMPT AND ABORT service action with the 3182c66ac9dbSNicholas Bellinger * SERVICE ACTION RESERVATION KEY value equal to the 3183c66ac9dbSNicholas Bellinger * persistent reservation holder's reservation key that 3184c66ac9dbSNicholas Bellinger * is received from the persistent reservation holder). 3185c66ac9dbSNicholas Bellinger * In that case, the device server shall establish the 3186c66ac9dbSNicholas Bellinger * new persistent reservation and maintain the 3187c66ac9dbSNicholas Bellinger * registration. 3188c66ac9dbSNicholas Bellinger */ 3189c66ac9dbSNicholas Bellinger prh_type = pr_res_holder->pr_res_type; 3190c66ac9dbSNicholas Bellinger prh_scope = pr_res_holder->pr_res_scope; 3191c66ac9dbSNicholas Bellinger /* 3192c66ac9dbSNicholas Bellinger * If the SERVICE ACTION RESERVATION KEY field identifies a 3193c66ac9dbSNicholas Bellinger * persistent reservation holder (see 5.7.10), the device 3194c66ac9dbSNicholas Bellinger * server shall perform a preempt by doing the following as 3195c66ac9dbSNicholas Bellinger * an uninterrupted series of actions: 3196c66ac9dbSNicholas Bellinger * 3197c66ac9dbSNicholas Bellinger * a) Release the persistent reservation for the holder 3198c66ac9dbSNicholas Bellinger * identified by the SERVICE ACTION RESERVATION KEY field; 3199c66ac9dbSNicholas Bellinger */ 3200c66ac9dbSNicholas Bellinger if (pr_reg_n != pr_res_holder) 3201c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, 3202c66ac9dbSNicholas Bellinger pr_res_holder->pr_reg_nacl, 3203c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder, 0); 3204c66ac9dbSNicholas Bellinger /* 3205c66ac9dbSNicholas Bellinger * b) Remove the registrations for all I_T nexuses identified 3206c66ac9dbSNicholas Bellinger * by the SERVICE ACTION RESERVATION KEY field, except the 3207c66ac9dbSNicholas Bellinger * I_T nexus that is being used for the PERSISTENT RESERVE 3208c66ac9dbSNicholas Bellinger * OUT command. If an all registrants persistent reservation 3209c66ac9dbSNicholas Bellinger * is present and the SERVICE ACTION RESERVATION KEY field 3210c66ac9dbSNicholas Bellinger * is set to zero, then all registrations shall be removed 3211c66ac9dbSNicholas Bellinger * except for that of the I_T nexus that is being used for 3212c66ac9dbSNicholas Bellinger * the PERSISTENT RESERVE OUT command; 3213c66ac9dbSNicholas Bellinger */ 3214c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 3215c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 3216c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 3217c66ac9dbSNicholas Bellinger 3218c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 3219c66ac9dbSNicholas Bellinger if (calling_it_nexus) 3220c66ac9dbSNicholas Bellinger continue; 3221c66ac9dbSNicholas Bellinger 3222c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_key != sa_res_key) 3223c66ac9dbSNicholas Bellinger continue; 3224c66ac9dbSNicholas Bellinger 3225c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 3226c66ac9dbSNicholas Bellinger pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; 3227c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, 3228c66ac9dbSNicholas Bellinger (abort) ? &preempt_and_abort_list : NULL, 3229c66ac9dbSNicholas Bellinger calling_it_nexus); 3230c66ac9dbSNicholas Bellinger /* 3231c66ac9dbSNicholas Bellinger * e) Establish a unit attention condition for the initiator 3232c66ac9dbSNicholas Bellinger * port associated with every I_T nexus that lost its 3233c66ac9dbSNicholas Bellinger * persistent reservation and/or registration, with the 3234c66ac9dbSNicholas Bellinger * additional sense code set to REGISTRATIONS PREEMPTED; 3235c66ac9dbSNicholas Bellinger */ 3236c66ac9dbSNicholas Bellinger core_scsi3_ua_allocate(pr_reg_nacl, pr_res_mapped_lun, 0x2A, 32379e08e34eSMarco Sanvido ASCQ_2AH_REGISTRATIONS_PREEMPTED); 3238c66ac9dbSNicholas Bellinger } 3239c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 3240c66ac9dbSNicholas Bellinger /* 3241c66ac9dbSNicholas Bellinger * c) Establish a persistent reservation for the preempting 3242c66ac9dbSNicholas Bellinger * I_T nexus using the contents of the SCOPE and TYPE fields; 3243c66ac9dbSNicholas Bellinger */ 3244c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_preempt(dev, pr_reg_n, 3245c66ac9dbSNicholas Bellinger (abort) ? &preempt_and_abort_list : NULL, 3246c66ac9dbSNicholas Bellinger type, scope, abort); 3247c66ac9dbSNicholas Bellinger /* 3248c66ac9dbSNicholas Bellinger * d) Process tasks as defined in 5.7.1; 3249c66ac9dbSNicholas Bellinger * e) See above.. 3250c66ac9dbSNicholas Bellinger * f) If the type or scope has changed, then for every I_T nexus 3251c66ac9dbSNicholas Bellinger * whose reservation key was not removed, except for the I_T 3252c66ac9dbSNicholas Bellinger * nexus on which the PERSISTENT RESERVE OUT command was 3253c66ac9dbSNicholas Bellinger * received, the device server shall establish a unit 3254c66ac9dbSNicholas Bellinger * attention condition for the initiator port associated with 3255c66ac9dbSNicholas Bellinger * that I_T nexus, with the additional sense code set to 3256c66ac9dbSNicholas Bellinger * RESERVATIONS RELEASED. If the type or scope have not 3257c66ac9dbSNicholas Bellinger * changed, then no unit attention condition(s) shall be 3258c66ac9dbSNicholas Bellinger * established for this reason. 3259c66ac9dbSNicholas Bellinger */ 3260c66ac9dbSNicholas Bellinger if ((prh_type != type) || (prh_scope != scope)) { 3261c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 3262c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 3263c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 3264c66ac9dbSNicholas Bellinger 3265c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 3266c66ac9dbSNicholas Bellinger if (calling_it_nexus) 3267c66ac9dbSNicholas Bellinger continue; 3268c66ac9dbSNicholas Bellinger 3269c66ac9dbSNicholas Bellinger core_scsi3_ua_allocate(pr_reg->pr_reg_nacl, 3270c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun, 0x2A, 3271c66ac9dbSNicholas Bellinger ASCQ_2AH_RESERVATIONS_RELEASED); 3272c66ac9dbSNicholas Bellinger } 3273c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 3274c66ac9dbSNicholas Bellinger } 3275c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3276c66ac9dbSNicholas Bellinger /* 3277c66ac9dbSNicholas Bellinger * Call LUN_RESET logic upon list of struct t10_pr_registration, 3278c66ac9dbSNicholas Bellinger * All received CDBs for the matching existing reservation and 3279c66ac9dbSNicholas Bellinger * registrations undergo ABORT_TASK logic. 3280c66ac9dbSNicholas Bellinger * 3281c66ac9dbSNicholas Bellinger * From there, core_scsi3_release_preempt_and_abort() will 3282c66ac9dbSNicholas Bellinger * release every registration in the list (which have already 3283c66ac9dbSNicholas Bellinger * been removed from the primary pr_reg list), except the 3284c66ac9dbSNicholas Bellinger * new persistent reservation holder, the calling Initiator Port. 3285c66ac9dbSNicholas Bellinger */ 3286c66ac9dbSNicholas Bellinger if (abort) { 3287c66ac9dbSNicholas Bellinger core_tmr_lun_reset(dev, NULL, &preempt_and_abort_list, cmd); 3288c66ac9dbSNicholas Bellinger core_scsi3_release_preempt_and_abort(&preempt_and_abort_list, 3289c66ac9dbSNicholas Bellinger pr_reg_n); 3290c66ac9dbSNicholas Bellinger } 3291c66ac9dbSNicholas Bellinger 3292c66ac9dbSNicholas Bellinger if (pr_tmpl->pr_aptpl_active) { 32935951146dSAndy Grover ret = core_scsi3_update_and_write_aptpl(cmd->se_dev, 3294c66ac9dbSNicholas Bellinger &pr_reg_n->pr_aptpl_buf[0], 3295c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_buf_len); 32966708bb27SAndy Grover if (!ret) 32976708bb27SAndy Grover pr_debug("SPC-3 PR: Updated APTPL metadata for PREEMPT" 3298c66ac9dbSNicholas Bellinger "%s\n", (abort) ? "_AND_ABORT" : ""); 3299c66ac9dbSNicholas Bellinger } 3300c66ac9dbSNicholas Bellinger 3301c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 33025951146dSAndy Grover core_scsi3_pr_generation(cmd->se_dev); 3303c66ac9dbSNicholas Bellinger return 0; 3304c66ac9dbSNicholas Bellinger } 3305c66ac9dbSNicholas Bellinger 3306c66ac9dbSNicholas Bellinger static int core_scsi3_emulate_pro_preempt( 3307c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 3308c66ac9dbSNicholas Bellinger int type, 3309c66ac9dbSNicholas Bellinger int scope, 3310c66ac9dbSNicholas Bellinger u64 res_key, 3311c66ac9dbSNicholas Bellinger u64 sa_res_key, 3312c66ac9dbSNicholas Bellinger int abort) 3313c66ac9dbSNicholas Bellinger { 3314c66ac9dbSNicholas Bellinger int ret = 0; 3315c66ac9dbSNicholas Bellinger 3316c66ac9dbSNicholas Bellinger switch (type) { 3317c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE: 3318c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS: 3319c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: 3320c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: 3321c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: 3322c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: 3323c66ac9dbSNicholas Bellinger ret = core_scsi3_pro_preempt(cmd, type, scope, 3324c66ac9dbSNicholas Bellinger res_key, sa_res_key, abort); 3325c66ac9dbSNicholas Bellinger break; 3326c66ac9dbSNicholas Bellinger default: 33276708bb27SAndy Grover pr_err("SPC-3 PR: Unknown Service Action PREEMPT%s" 3328c66ac9dbSNicholas Bellinger " Type: 0x%02x\n", (abort) ? "_AND_ABORT" : "", type); 332903e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; 333003e98c9eSNicholas Bellinger return -EINVAL; 3331c66ac9dbSNicholas Bellinger } 3332c66ac9dbSNicholas Bellinger 3333c66ac9dbSNicholas Bellinger return ret; 3334c66ac9dbSNicholas Bellinger } 3335c66ac9dbSNicholas Bellinger 3336c66ac9dbSNicholas Bellinger 3337c66ac9dbSNicholas Bellinger static int core_scsi3_emulate_pro_register_and_move( 3338c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 3339c66ac9dbSNicholas Bellinger u64 res_key, 3340c66ac9dbSNicholas Bellinger u64 sa_res_key, 3341c66ac9dbSNicholas Bellinger int aptpl, 3342c66ac9dbSNicholas Bellinger int unreg) 3343c66ac9dbSNicholas Bellinger { 3344e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 33455951146dSAndy Grover struct se_device *dev = cmd->se_dev; 3346c66ac9dbSNicholas Bellinger struct se_dev_entry *se_deve, *dest_se_deve = NULL; 3347e3d6f909SAndy Grover struct se_lun *se_lun = cmd->se_lun; 3348c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl, *pr_reg_nacl, *dest_node_acl = NULL; 3349c66ac9dbSNicholas Bellinger struct se_port *se_port; 3350c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg, *dest_se_tpg = NULL; 3351c66ac9dbSNicholas Bellinger struct target_core_fabric_ops *dest_tf_ops = NULL, *tf_ops; 3352c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_res_holder, *dest_pr_reg; 3353e3d6f909SAndy Grover struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; 335405d1c7c0SAndy Grover unsigned char *buf; 3355c66ac9dbSNicholas Bellinger unsigned char *initiator_str; 3356c66ac9dbSNicholas Bellinger char *iport_ptr = NULL, dest_iport[64], i_buf[PR_REG_ISID_ID_LEN]; 3357c66ac9dbSNicholas Bellinger u32 tid_len, tmp_tid_len; 3358c66ac9dbSNicholas Bellinger int new_reg = 0, type, scope, ret, matching_iname, prf_isid; 3359c66ac9dbSNicholas Bellinger unsigned short rtpi; 3360c66ac9dbSNicholas Bellinger unsigned char proto_ident; 3361c66ac9dbSNicholas Bellinger 33626708bb27SAndy Grover if (!se_sess || !se_lun) { 33636708bb27SAndy Grover pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); 336403e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 336503e98c9eSNicholas Bellinger return -EINVAL; 3366c66ac9dbSNicholas Bellinger } 3367c66ac9dbSNicholas Bellinger memset(dest_iport, 0, 64); 3368c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 3369c66ac9dbSNicholas Bellinger se_tpg = se_sess->se_tpg; 3370e3d6f909SAndy Grover tf_ops = se_tpg->se_tpg_tfo; 3371c66ac9dbSNicholas Bellinger se_deve = &se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; 3372c66ac9dbSNicholas Bellinger /* 3373c66ac9dbSNicholas Bellinger * Follow logic from spc4r17 Section 5.7.8, Table 50 -- 3374c66ac9dbSNicholas Bellinger * Register behaviors for a REGISTER AND MOVE service action 3375c66ac9dbSNicholas Bellinger * 3376c66ac9dbSNicholas Bellinger * Locate the existing *pr_reg via struct se_node_acl pointers 3377c66ac9dbSNicholas Bellinger */ 33785951146dSAndy Grover pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, 3379c66ac9dbSNicholas Bellinger se_sess); 33806708bb27SAndy Grover if (!pr_reg) { 33816708bb27SAndy Grover pr_err("SPC-3 PR: Unable to locate PR_REGISTERED" 3382c66ac9dbSNicholas Bellinger " *pr_reg for REGISTER_AND_MOVE\n"); 338303e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 338403e98c9eSNicholas Bellinger return -EINVAL; 3385c66ac9dbSNicholas Bellinger } 3386c66ac9dbSNicholas Bellinger /* 3387c66ac9dbSNicholas Bellinger * The provided reservation key much match the existing reservation key 3388c66ac9dbSNicholas Bellinger * provided during this initiator's I_T nexus registration. 3389c66ac9dbSNicholas Bellinger */ 3390c66ac9dbSNicholas Bellinger if (res_key != pr_reg->pr_res_key) { 33916708bb27SAndy Grover pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received" 3392c66ac9dbSNicholas Bellinger " res_key: 0x%016Lx does not match existing SA REGISTER" 3393c66ac9dbSNicholas Bellinger " res_key: 0x%016Lx\n", res_key, pr_reg->pr_res_key); 3394c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 339503e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 339603e98c9eSNicholas Bellinger return -EINVAL; 3397c66ac9dbSNicholas Bellinger } 3398c66ac9dbSNicholas Bellinger /* 3399c66ac9dbSNicholas Bellinger * The service active reservation key needs to be non zero 3400c66ac9dbSNicholas Bellinger */ 34016708bb27SAndy Grover if (!sa_res_key) { 34026708bb27SAndy Grover pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received zero" 3403c66ac9dbSNicholas Bellinger " sa_res_key\n"); 3404c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 340503e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 340603e98c9eSNicholas Bellinger return -EINVAL; 3407c66ac9dbSNicholas Bellinger } 340805d1c7c0SAndy Grover 3409c66ac9dbSNicholas Bellinger /* 3410c66ac9dbSNicholas Bellinger * Determine the Relative Target Port Identifier where the reservation 3411c66ac9dbSNicholas Bellinger * will be moved to for the TransportID containing SCSI initiator WWN 3412c66ac9dbSNicholas Bellinger * information. 3413c66ac9dbSNicholas Bellinger */ 34144949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3415c66ac9dbSNicholas Bellinger rtpi = (buf[18] & 0xff) << 8; 3416c66ac9dbSNicholas Bellinger rtpi |= buf[19] & 0xff; 3417c66ac9dbSNicholas Bellinger tid_len = (buf[20] & 0xff) << 24; 3418c66ac9dbSNicholas Bellinger tid_len |= (buf[21] & 0xff) << 16; 3419c66ac9dbSNicholas Bellinger tid_len |= (buf[22] & 0xff) << 8; 3420c66ac9dbSNicholas Bellinger tid_len |= buf[23] & 0xff; 34214949314cSAndy Grover transport_kunmap_data_sg(cmd); 342205d1c7c0SAndy Grover buf = NULL; 3423c66ac9dbSNicholas Bellinger 3424c66ac9dbSNicholas Bellinger if ((tid_len + 24) != cmd->data_length) { 34256708bb27SAndy Grover pr_err("SPC-3 PR: Illegal tid_len: %u + 24 byte header" 3426c66ac9dbSNicholas Bellinger " does not equal CDB data_length: %u\n", tid_len, 3427c66ac9dbSNicholas Bellinger cmd->data_length); 3428c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 342903e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 343003e98c9eSNicholas Bellinger return -EINVAL; 3431c66ac9dbSNicholas Bellinger } 3432c66ac9dbSNicholas Bellinger 3433c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 3434c66ac9dbSNicholas Bellinger list_for_each_entry(se_port, &dev->dev_sep_list, sep_list) { 3435c66ac9dbSNicholas Bellinger if (se_port->sep_rtpi != rtpi) 3436c66ac9dbSNicholas Bellinger continue; 3437c66ac9dbSNicholas Bellinger dest_se_tpg = se_port->sep_tpg; 34386708bb27SAndy Grover if (!dest_se_tpg) 3439c66ac9dbSNicholas Bellinger continue; 3440e3d6f909SAndy Grover dest_tf_ops = dest_se_tpg->se_tpg_tfo; 34416708bb27SAndy Grover if (!dest_tf_ops) 3442c66ac9dbSNicholas Bellinger continue; 3443c66ac9dbSNicholas Bellinger 3444c66ac9dbSNicholas Bellinger atomic_inc(&dest_se_tpg->tpg_pr_ref_count); 3445c66ac9dbSNicholas Bellinger smp_mb__after_atomic_inc(); 3446c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 3447c66ac9dbSNicholas Bellinger 3448c66ac9dbSNicholas Bellinger ret = core_scsi3_tpg_depend_item(dest_se_tpg); 3449c66ac9dbSNicholas Bellinger if (ret != 0) { 34506708bb27SAndy Grover pr_err("core_scsi3_tpg_depend_item() failed" 3451c66ac9dbSNicholas Bellinger " for dest_se_tpg\n"); 3452c66ac9dbSNicholas Bellinger atomic_dec(&dest_se_tpg->tpg_pr_ref_count); 3453c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 3454c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 345503e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 345603e98c9eSNicholas Bellinger return -EINVAL; 3457c66ac9dbSNicholas Bellinger } 3458c66ac9dbSNicholas Bellinger 3459c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 3460c66ac9dbSNicholas Bellinger break; 3461c66ac9dbSNicholas Bellinger } 3462c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 3463c66ac9dbSNicholas Bellinger 34646708bb27SAndy Grover if (!dest_se_tpg || !dest_tf_ops) { 34656708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate" 3466c66ac9dbSNicholas Bellinger " fabric ops from Relative Target Port Identifier:" 3467c66ac9dbSNicholas Bellinger " %hu\n", rtpi); 3468c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 346903e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 347003e98c9eSNicholas Bellinger return -EINVAL; 3471c66ac9dbSNicholas Bellinger } 347205d1c7c0SAndy Grover 34734949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3474c66ac9dbSNicholas Bellinger proto_ident = (buf[24] & 0x0f); 3475c66ac9dbSNicholas Bellinger #if 0 34766708bb27SAndy Grover pr_debug("SPC-3 PR REGISTER_AND_MOVE: Extracted Protocol Identifier:" 3477c66ac9dbSNicholas Bellinger " 0x%02x\n", proto_ident); 3478c66ac9dbSNicholas Bellinger #endif 3479c66ac9dbSNicholas Bellinger if (proto_ident != dest_tf_ops->get_fabric_proto_ident(dest_se_tpg)) { 34806708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: Received" 3481c66ac9dbSNicholas Bellinger " proto_ident: 0x%02x does not match ident: 0x%02x" 3482c66ac9dbSNicholas Bellinger " from fabric: %s\n", proto_ident, 3483c66ac9dbSNicholas Bellinger dest_tf_ops->get_fabric_proto_ident(dest_se_tpg), 3484c66ac9dbSNicholas Bellinger dest_tf_ops->get_fabric_name()); 348503e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 348603e98c9eSNicholas Bellinger ret = -EINVAL; 3487c66ac9dbSNicholas Bellinger goto out; 3488c66ac9dbSNicholas Bellinger } 3489c66ac9dbSNicholas Bellinger if (dest_tf_ops->tpg_parse_pr_out_transport_id == NULL) { 34906708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: Fabric does not" 3491c66ac9dbSNicholas Bellinger " containg a valid tpg_parse_pr_out_transport_id" 3492c66ac9dbSNicholas Bellinger " function pointer\n"); 349303e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 349403e98c9eSNicholas Bellinger ret = -EINVAL; 3495c66ac9dbSNicholas Bellinger goto out; 3496c66ac9dbSNicholas Bellinger } 3497c66ac9dbSNicholas Bellinger initiator_str = dest_tf_ops->tpg_parse_pr_out_transport_id(dest_se_tpg, 3498c66ac9dbSNicholas Bellinger (const char *)&buf[24], &tmp_tid_len, &iport_ptr); 34996708bb27SAndy Grover if (!initiator_str) { 35006708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate" 3501c66ac9dbSNicholas Bellinger " initiator_str from Transport ID\n"); 350203e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 350303e98c9eSNicholas Bellinger ret = -EINVAL; 3504c66ac9dbSNicholas Bellinger goto out; 3505c66ac9dbSNicholas Bellinger } 3506c66ac9dbSNicholas Bellinger 35074949314cSAndy Grover transport_kunmap_data_sg(cmd); 350805d1c7c0SAndy Grover buf = NULL; 350905d1c7c0SAndy Grover 35106708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Extracted initiator %s identifier: %s" 3511c66ac9dbSNicholas Bellinger " %s\n", dest_tf_ops->get_fabric_name(), (iport_ptr != NULL) ? 3512c66ac9dbSNicholas Bellinger "port" : "device", initiator_str, (iport_ptr != NULL) ? 3513c66ac9dbSNicholas Bellinger iport_ptr : ""); 3514c66ac9dbSNicholas Bellinger /* 3515c66ac9dbSNicholas Bellinger * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service 3516c66ac9dbSNicholas Bellinger * action specifies a TransportID that is the same as the initiator port 3517c66ac9dbSNicholas Bellinger * of the I_T nexus for the command received, then the command shall 3518c66ac9dbSNicholas Bellinger * be terminated with CHECK CONDITION status, with the sense key set to 3519c66ac9dbSNicholas Bellinger * ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD 3520c66ac9dbSNicholas Bellinger * IN PARAMETER LIST. 3521c66ac9dbSNicholas Bellinger */ 3522c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 3523c66ac9dbSNicholas Bellinger matching_iname = (!strcmp(initiator_str, 3524c66ac9dbSNicholas Bellinger pr_reg_nacl->initiatorname)) ? 1 : 0; 35256708bb27SAndy Grover if (!matching_iname) 3526c66ac9dbSNicholas Bellinger goto after_iport_check; 3527c66ac9dbSNicholas Bellinger 35286708bb27SAndy Grover if (!iport_ptr || !pr_reg->isid_present_at_reg) { 35296708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s" 3530c66ac9dbSNicholas Bellinger " matches: %s on received I_T Nexus\n", initiator_str, 3531c66ac9dbSNicholas Bellinger pr_reg_nacl->initiatorname); 353203e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 353303e98c9eSNicholas Bellinger ret = -EINVAL; 3534c66ac9dbSNicholas Bellinger goto out; 3535c66ac9dbSNicholas Bellinger } 35366708bb27SAndy Grover if (!strcmp(iport_ptr, pr_reg->pr_reg_isid)) { 35376708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s %s" 3538c66ac9dbSNicholas Bellinger " matches: %s %s on received I_T Nexus\n", 3539c66ac9dbSNicholas Bellinger initiator_str, iport_ptr, pr_reg_nacl->initiatorname, 3540c66ac9dbSNicholas Bellinger pr_reg->pr_reg_isid); 354103e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 354203e98c9eSNicholas Bellinger ret = -EINVAL; 3543c66ac9dbSNicholas Bellinger goto out; 3544c66ac9dbSNicholas Bellinger } 3545c66ac9dbSNicholas Bellinger after_iport_check: 3546c66ac9dbSNicholas Bellinger /* 3547c66ac9dbSNicholas Bellinger * Locate the destination struct se_node_acl from the received Transport ID 3548c66ac9dbSNicholas Bellinger */ 354928638887SRoland Dreier spin_lock_irq(&dest_se_tpg->acl_node_lock); 3550c66ac9dbSNicholas Bellinger dest_node_acl = __core_tpg_get_initiator_node_acl(dest_se_tpg, 3551c66ac9dbSNicholas Bellinger initiator_str); 3552c66ac9dbSNicholas Bellinger if (dest_node_acl) { 3553c66ac9dbSNicholas Bellinger atomic_inc(&dest_node_acl->acl_pr_ref_count); 3554c66ac9dbSNicholas Bellinger smp_mb__after_atomic_inc(); 3555c66ac9dbSNicholas Bellinger } 355628638887SRoland Dreier spin_unlock_irq(&dest_se_tpg->acl_node_lock); 3557c66ac9dbSNicholas Bellinger 35586708bb27SAndy Grover if (!dest_node_acl) { 35596708bb27SAndy Grover pr_err("Unable to locate %s dest_node_acl for" 3560c66ac9dbSNicholas Bellinger " TransportID%s\n", dest_tf_ops->get_fabric_name(), 3561c66ac9dbSNicholas Bellinger initiator_str); 356203e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 356303e98c9eSNicholas Bellinger ret = -EINVAL; 3564c66ac9dbSNicholas Bellinger goto out; 3565c66ac9dbSNicholas Bellinger } 3566c66ac9dbSNicholas Bellinger ret = core_scsi3_nodeacl_depend_item(dest_node_acl); 3567c66ac9dbSNicholas Bellinger if (ret != 0) { 35686708bb27SAndy Grover pr_err("core_scsi3_nodeacl_depend_item() for" 3569c66ac9dbSNicholas Bellinger " dest_node_acl\n"); 3570c66ac9dbSNicholas Bellinger atomic_dec(&dest_node_acl->acl_pr_ref_count); 3571c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 3572c66ac9dbSNicholas Bellinger dest_node_acl = NULL; 357303e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 357403e98c9eSNicholas Bellinger ret = -EINVAL; 3575c66ac9dbSNicholas Bellinger goto out; 3576c66ac9dbSNicholas Bellinger } 3577c66ac9dbSNicholas Bellinger #if 0 35786708bb27SAndy Grover pr_debug("SPC-3 PR REGISTER_AND_MOVE: Found %s dest_node_acl:" 3579c66ac9dbSNicholas Bellinger " %s from TransportID\n", dest_tf_ops->get_fabric_name(), 3580c66ac9dbSNicholas Bellinger dest_node_acl->initiatorname); 3581c66ac9dbSNicholas Bellinger #endif 3582c66ac9dbSNicholas Bellinger /* 3583c66ac9dbSNicholas Bellinger * Locate the struct se_dev_entry pointer for the matching RELATIVE TARGET 3584c66ac9dbSNicholas Bellinger * PORT IDENTIFIER. 3585c66ac9dbSNicholas Bellinger */ 3586c66ac9dbSNicholas Bellinger dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, rtpi); 35876708bb27SAndy Grover if (!dest_se_deve) { 35886708bb27SAndy Grover pr_err("Unable to locate %s dest_se_deve from RTPI:" 3589c66ac9dbSNicholas Bellinger " %hu\n", dest_tf_ops->get_fabric_name(), rtpi); 359003e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 359103e98c9eSNicholas Bellinger ret = -EINVAL; 3592c66ac9dbSNicholas Bellinger goto out; 3593c66ac9dbSNicholas Bellinger } 3594c66ac9dbSNicholas Bellinger 3595c66ac9dbSNicholas Bellinger ret = core_scsi3_lunacl_depend_item(dest_se_deve); 3596c66ac9dbSNicholas Bellinger if (ret < 0) { 35976708bb27SAndy Grover pr_err("core_scsi3_lunacl_depend_item() failed\n"); 3598c66ac9dbSNicholas Bellinger atomic_dec(&dest_se_deve->pr_ref_count); 3599c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 3600c66ac9dbSNicholas Bellinger dest_se_deve = NULL; 360103e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 360203e98c9eSNicholas Bellinger ret = -EINVAL; 3603c66ac9dbSNicholas Bellinger goto out; 3604c66ac9dbSNicholas Bellinger } 3605c66ac9dbSNicholas Bellinger #if 0 36066708bb27SAndy Grover pr_debug("SPC-3 PR REGISTER_AND_MOVE: Located %s node %s LUN" 3607c66ac9dbSNicholas Bellinger " ACL for dest_se_deve->mapped_lun: %u\n", 3608c66ac9dbSNicholas Bellinger dest_tf_ops->get_fabric_name(), dest_node_acl->initiatorname, 3609c66ac9dbSNicholas Bellinger dest_se_deve->mapped_lun); 3610c66ac9dbSNicholas Bellinger #endif 3611c66ac9dbSNicholas Bellinger /* 3612c66ac9dbSNicholas Bellinger * A persistent reservation needs to already existing in order to 3613c66ac9dbSNicholas Bellinger * successfully complete the REGISTER_AND_MOVE service action.. 3614c66ac9dbSNicholas Bellinger */ 3615c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 3616c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 36176708bb27SAndy Grover if (!pr_res_holder) { 36186708bb27SAndy Grover pr_warn("SPC-3 PR REGISTER_AND_MOVE: No reservation" 3619c66ac9dbSNicholas Bellinger " currently held\n"); 3620c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 362103e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; 362203e98c9eSNicholas Bellinger ret = -EINVAL; 3623c66ac9dbSNicholas Bellinger goto out; 3624c66ac9dbSNicholas Bellinger } 3625c66ac9dbSNicholas Bellinger /* 3626c66ac9dbSNicholas Bellinger * The received on I_T Nexus must be the reservation holder. 3627c66ac9dbSNicholas Bellinger * 3628c66ac9dbSNicholas Bellinger * From spc4r17 section 5.7.8 Table 50 -- 3629c66ac9dbSNicholas Bellinger * Register behaviors for a REGISTER AND MOVE service action 3630c66ac9dbSNicholas Bellinger */ 3631c66ac9dbSNicholas Bellinger if (pr_res_holder != pr_reg) { 36326708bb27SAndy Grover pr_warn("SPC-3 PR REGISTER_AND_MOVE: Calling I_T" 3633c66ac9dbSNicholas Bellinger " Nexus is not reservation holder\n"); 3634c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 363503e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 363603e98c9eSNicholas Bellinger ret = -EINVAL; 3637c66ac9dbSNicholas Bellinger goto out; 3638c66ac9dbSNicholas Bellinger } 3639c66ac9dbSNicholas Bellinger /* 3640c66ac9dbSNicholas Bellinger * From spc4r17 section 5.7.8: registering and moving reservation 3641c66ac9dbSNicholas Bellinger * 3642c66ac9dbSNicholas Bellinger * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service 3643c66ac9dbSNicholas Bellinger * action is received and the established persistent reservation is a 3644c66ac9dbSNicholas Bellinger * Write Exclusive - All Registrants type or Exclusive Access - 3645c66ac9dbSNicholas Bellinger * All Registrants type reservation, then the command shall be completed 3646c66ac9dbSNicholas Bellinger * with RESERVATION CONFLICT status. 3647c66ac9dbSNicholas Bellinger */ 3648c66ac9dbSNicholas Bellinger if ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 3649c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { 36506708bb27SAndy Grover pr_warn("SPC-3 PR REGISTER_AND_MOVE: Unable to move" 3651c66ac9dbSNicholas Bellinger " reservation for type: %s\n", 3652c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_res_holder->pr_res_type)); 3653c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 365403e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 365503e98c9eSNicholas Bellinger ret = -EINVAL; 3656c66ac9dbSNicholas Bellinger goto out; 3657c66ac9dbSNicholas Bellinger } 3658c66ac9dbSNicholas Bellinger pr_res_nacl = pr_res_holder->pr_reg_nacl; 3659c66ac9dbSNicholas Bellinger /* 3660c66ac9dbSNicholas Bellinger * b) Ignore the contents of the (received) SCOPE and TYPE fields; 3661c66ac9dbSNicholas Bellinger */ 3662c66ac9dbSNicholas Bellinger type = pr_res_holder->pr_res_type; 3663c66ac9dbSNicholas Bellinger scope = pr_res_holder->pr_res_type; 3664c66ac9dbSNicholas Bellinger /* 3665c66ac9dbSNicholas Bellinger * c) Associate the reservation key specified in the SERVICE ACTION 3666c66ac9dbSNicholas Bellinger * RESERVATION KEY field with the I_T nexus specified as the 3667c66ac9dbSNicholas Bellinger * destination of the register and move, where: 3668c66ac9dbSNicholas Bellinger * A) The I_T nexus is specified by the TransportID and the 3669c66ac9dbSNicholas Bellinger * RELATIVE TARGET PORT IDENTIFIER field (see 6.14.4); and 3670c66ac9dbSNicholas Bellinger * B) Regardless of the TransportID format used, the association for 3671c66ac9dbSNicholas Bellinger * the initiator port is based on either the initiator port name 3672c66ac9dbSNicholas Bellinger * (see 3.1.71) on SCSI transport protocols where port names are 3673c66ac9dbSNicholas Bellinger * required or the initiator port identifier (see 3.1.70) on SCSI 3674c66ac9dbSNicholas Bellinger * transport protocols where port names are not required; 3675c66ac9dbSNicholas Bellinger * d) Register the reservation key specified in the SERVICE ACTION 3676c66ac9dbSNicholas Bellinger * RESERVATION KEY field; 3677c66ac9dbSNicholas Bellinger * e) Retain the reservation key specified in the SERVICE ACTION 3678c66ac9dbSNicholas Bellinger * RESERVATION KEY field and associated information; 3679c66ac9dbSNicholas Bellinger * 3680c66ac9dbSNicholas Bellinger * Also, It is not an error for a REGISTER AND MOVE service action to 3681c66ac9dbSNicholas Bellinger * register an I_T nexus that is already registered with the same 3682c66ac9dbSNicholas Bellinger * reservation key or a different reservation key. 3683c66ac9dbSNicholas Bellinger */ 3684c66ac9dbSNicholas Bellinger dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl, 3685c66ac9dbSNicholas Bellinger iport_ptr); 36866708bb27SAndy Grover if (!dest_pr_reg) { 36875951146dSAndy Grover ret = core_scsi3_alloc_registration(cmd->se_dev, 3688c66ac9dbSNicholas Bellinger dest_node_acl, dest_se_deve, iport_ptr, 3689c66ac9dbSNicholas Bellinger sa_res_key, 0, aptpl, 2, 1); 3690c66ac9dbSNicholas Bellinger if (ret != 0) { 3691c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 369203e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 369303e98c9eSNicholas Bellinger ret = -EINVAL; 3694c66ac9dbSNicholas Bellinger goto out; 3695c66ac9dbSNicholas Bellinger } 3696c66ac9dbSNicholas Bellinger dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl, 3697c66ac9dbSNicholas Bellinger iport_ptr); 3698c66ac9dbSNicholas Bellinger new_reg = 1; 3699c66ac9dbSNicholas Bellinger } 3700c66ac9dbSNicholas Bellinger /* 3701c66ac9dbSNicholas Bellinger * f) Release the persistent reservation for the persistent reservation 3702c66ac9dbSNicholas Bellinger * holder (i.e., the I_T nexus on which the 3703c66ac9dbSNicholas Bellinger */ 3704c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, pr_res_nacl, 3705c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder, 0); 3706c66ac9dbSNicholas Bellinger /* 3707c66ac9dbSNicholas Bellinger * g) Move the persistent reservation to the specified I_T nexus using 3708c66ac9dbSNicholas Bellinger * the same scope and type as the persistent reservation released in 3709c66ac9dbSNicholas Bellinger * item f); and 3710c66ac9dbSNicholas Bellinger */ 3711c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = dest_pr_reg; 3712c66ac9dbSNicholas Bellinger dest_pr_reg->pr_res_holder = 1; 3713c66ac9dbSNicholas Bellinger dest_pr_reg->pr_res_type = type; 3714c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope = scope; 3715c66ac9dbSNicholas Bellinger prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], 3716c66ac9dbSNicholas Bellinger PR_REG_ISID_ID_LEN); 3717c66ac9dbSNicholas Bellinger /* 3718c66ac9dbSNicholas Bellinger * Increment PRGeneration for existing registrations.. 3719c66ac9dbSNicholas Bellinger */ 37206708bb27SAndy Grover if (!new_reg) 3721c66ac9dbSNicholas Bellinger dest_pr_reg->pr_res_generation = pr_tmpl->pr_generation++; 3722c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3723c66ac9dbSNicholas Bellinger 37246708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: REGISTER_AND_MOVE" 3725c66ac9dbSNicholas Bellinger " created new reservation holder TYPE: %s on object RTPI:" 3726c66ac9dbSNicholas Bellinger " %hu PRGeneration: 0x%08x\n", dest_tf_ops->get_fabric_name(), 3727c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(type), rtpi, 3728c66ac9dbSNicholas Bellinger dest_pr_reg->pr_res_generation); 37296708bb27SAndy Grover pr_debug("SPC-3 PR Successfully moved reservation from" 3730c66ac9dbSNicholas Bellinger " %s Fabric Node: %s%s -> %s Fabric Node: %s %s\n", 3731c66ac9dbSNicholas Bellinger tf_ops->get_fabric_name(), pr_reg_nacl->initiatorname, 3732c66ac9dbSNicholas Bellinger (prf_isid) ? &i_buf[0] : "", dest_tf_ops->get_fabric_name(), 3733c66ac9dbSNicholas Bellinger dest_node_acl->initiatorname, (iport_ptr != NULL) ? 3734c66ac9dbSNicholas Bellinger iport_ptr : ""); 3735c66ac9dbSNicholas Bellinger /* 3736c66ac9dbSNicholas Bellinger * It is now safe to release configfs group dependencies for destination 3737c66ac9dbSNicholas Bellinger * of Transport ID Initiator Device/Port Identifier 3738c66ac9dbSNicholas Bellinger */ 3739c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 3740c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 3741c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_se_tpg); 3742c66ac9dbSNicholas Bellinger /* 3743c66ac9dbSNicholas Bellinger * h) If the UNREG bit is set to one, unregister (see 5.7.11.3) the I_T 3744c66ac9dbSNicholas Bellinger * nexus on which PERSISTENT RESERVE OUT command was received. 3745c66ac9dbSNicholas Bellinger */ 3746c66ac9dbSNicholas Bellinger if (unreg) { 3747c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 3748c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, NULL, 1); 3749c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 3750c66ac9dbSNicholas Bellinger } else 3751c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 3752c66ac9dbSNicholas Bellinger 3753c66ac9dbSNicholas Bellinger /* 3754c66ac9dbSNicholas Bellinger * Clear the APTPL metadata if APTPL has been disabled, otherwise 3755c66ac9dbSNicholas Bellinger * write out the updated metadata to struct file for this SCSI device. 3756c66ac9dbSNicholas Bellinger */ 37576708bb27SAndy Grover if (!aptpl) { 3758c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_active = 0; 37595951146dSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, NULL, 0); 37606708bb27SAndy Grover pr_debug("SPC-3 PR: Set APTPL Bit Deactivated for" 3761c66ac9dbSNicholas Bellinger " REGISTER_AND_MOVE\n"); 3762c66ac9dbSNicholas Bellinger } else { 3763c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_active = 1; 37645951146dSAndy Grover ret = core_scsi3_update_and_write_aptpl(cmd->se_dev, 3765c66ac9dbSNicholas Bellinger &dest_pr_reg->pr_aptpl_buf[0], 3766c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_buf_len); 37676708bb27SAndy Grover if (!ret) 37686708bb27SAndy Grover pr_debug("SPC-3 PR: Set APTPL Bit Activated for" 3769c66ac9dbSNicholas Bellinger " REGISTER_AND_MOVE\n"); 3770c66ac9dbSNicholas Bellinger } 3771c66ac9dbSNicholas Bellinger 37724949314cSAndy Grover transport_kunmap_data_sg(cmd); 377305d1c7c0SAndy Grover 3774c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(dest_pr_reg); 3775c66ac9dbSNicholas Bellinger return 0; 3776c66ac9dbSNicholas Bellinger out: 377705d1c7c0SAndy Grover if (buf) 37784949314cSAndy Grover transport_kunmap_data_sg(cmd); 3779c66ac9dbSNicholas Bellinger if (dest_se_deve) 3780c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 3781c66ac9dbSNicholas Bellinger if (dest_node_acl) 3782c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 3783c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_se_tpg); 3784c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 3785c66ac9dbSNicholas Bellinger return ret; 3786c66ac9dbSNicholas Bellinger } 3787c66ac9dbSNicholas Bellinger 3788c66ac9dbSNicholas Bellinger static unsigned long long core_scsi3_extract_reservation_key(unsigned char *cdb) 3789c66ac9dbSNicholas Bellinger { 3790c66ac9dbSNicholas Bellinger unsigned int __v1, __v2; 3791c66ac9dbSNicholas Bellinger 3792c66ac9dbSNicholas Bellinger __v1 = (cdb[0] << 24) | (cdb[1] << 16) | (cdb[2] << 8) | cdb[3]; 3793c66ac9dbSNicholas Bellinger __v2 = (cdb[4] << 24) | (cdb[5] << 16) | (cdb[6] << 8) | cdb[7]; 3794c66ac9dbSNicholas Bellinger 3795c66ac9dbSNicholas Bellinger return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; 3796c66ac9dbSNicholas Bellinger } 3797c66ac9dbSNicholas Bellinger 3798c66ac9dbSNicholas Bellinger /* 3799c66ac9dbSNicholas Bellinger * See spc4r17 section 6.14 Table 170 3800c66ac9dbSNicholas Bellinger */ 3801e76a35d6SChristoph Hellwig int target_scsi3_emulate_pr_out(struct se_task *task) 3802c66ac9dbSNicholas Bellinger { 3803e76a35d6SChristoph Hellwig struct se_cmd *cmd = task->task_se_cmd; 3804617c0e06SChristoph Hellwig unsigned char *cdb = &cmd->t_task_cdb[0]; 380505d1c7c0SAndy Grover unsigned char *buf; 3806c66ac9dbSNicholas Bellinger u64 res_key, sa_res_key; 3807c66ac9dbSNicholas Bellinger int sa, scope, type, aptpl; 3808c66ac9dbSNicholas Bellinger int spec_i_pt = 0, all_tg_pt = 0, unreg = 0; 3809d29a5b6aSChristoph Hellwig int ret; 3810617c0e06SChristoph Hellwig 3811617c0e06SChristoph Hellwig /* 3812617c0e06SChristoph Hellwig * Following spc2r20 5.5.1 Reservations overview: 3813617c0e06SChristoph Hellwig * 3814617c0e06SChristoph Hellwig * If a logical unit has been reserved by any RESERVE command and is 3815617c0e06SChristoph Hellwig * still reserved by any initiator, all PERSISTENT RESERVE IN and all 3816617c0e06SChristoph Hellwig * PERSISTENT RESERVE OUT commands shall conflict regardless of 3817617c0e06SChristoph Hellwig * initiator or service action and shall terminate with a RESERVATION 3818617c0e06SChristoph Hellwig * CONFLICT status. 3819617c0e06SChristoph Hellwig */ 3820617c0e06SChristoph Hellwig if (cmd->se_dev->dev_flags & DF_SPC2_RESERVATIONS) { 3821617c0e06SChristoph Hellwig pr_err("Received PERSISTENT_RESERVE CDB while legacy" 3822617c0e06SChristoph Hellwig " SPC-2 reservation is held, returning" 3823617c0e06SChristoph Hellwig " RESERVATION_CONFLICT\n"); 382403e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 382503e98c9eSNicholas Bellinger ret = EINVAL; 3826d29a5b6aSChristoph Hellwig goto out; 3827617c0e06SChristoph Hellwig } 3828617c0e06SChristoph Hellwig 3829c66ac9dbSNicholas Bellinger /* 3830c66ac9dbSNicholas Bellinger * FIXME: A NULL struct se_session pointer means an this is not coming from 3831c66ac9dbSNicholas Bellinger * a $FABRIC_MOD's nexus, but from internal passthrough ops. 3832c66ac9dbSNicholas Bellinger */ 383303e98c9eSNicholas Bellinger if (!cmd->se_sess) { 383403e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 383503e98c9eSNicholas Bellinger return -EINVAL; 383603e98c9eSNicholas Bellinger } 3837c66ac9dbSNicholas Bellinger 3838c66ac9dbSNicholas Bellinger if (cmd->data_length < 24) { 38396708bb27SAndy Grover pr_warn("SPC-PR: Received PR OUT parameter list" 3840c66ac9dbSNicholas Bellinger " length too small: %u\n", cmd->data_length); 384103e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 384203e98c9eSNicholas Bellinger ret = -EINVAL; 3843d29a5b6aSChristoph Hellwig goto out; 3844c66ac9dbSNicholas Bellinger } 3845c66ac9dbSNicholas Bellinger /* 3846c66ac9dbSNicholas Bellinger * From the PERSISTENT_RESERVE_OUT command descriptor block (CDB) 3847c66ac9dbSNicholas Bellinger */ 3848c66ac9dbSNicholas Bellinger sa = (cdb[1] & 0x1f); 3849c66ac9dbSNicholas Bellinger scope = (cdb[2] & 0xf0); 3850c66ac9dbSNicholas Bellinger type = (cdb[2] & 0x0f); 385105d1c7c0SAndy Grover 38524949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3853c66ac9dbSNicholas Bellinger /* 3854c66ac9dbSNicholas Bellinger * From PERSISTENT_RESERVE_OUT parameter list (payload) 3855c66ac9dbSNicholas Bellinger */ 3856c66ac9dbSNicholas Bellinger res_key = core_scsi3_extract_reservation_key(&buf[0]); 3857c66ac9dbSNicholas Bellinger sa_res_key = core_scsi3_extract_reservation_key(&buf[8]); 3858c66ac9dbSNicholas Bellinger /* 3859c66ac9dbSNicholas Bellinger * REGISTER_AND_MOVE uses a different SA parameter list containing 3860c66ac9dbSNicholas Bellinger * SCSI TransportIDs. 3861c66ac9dbSNicholas Bellinger */ 3862c66ac9dbSNicholas Bellinger if (sa != PRO_REGISTER_AND_MOVE) { 3863c66ac9dbSNicholas Bellinger spec_i_pt = (buf[20] & 0x08); 3864c66ac9dbSNicholas Bellinger all_tg_pt = (buf[20] & 0x04); 3865c66ac9dbSNicholas Bellinger aptpl = (buf[20] & 0x01); 3866c66ac9dbSNicholas Bellinger } else { 3867c66ac9dbSNicholas Bellinger aptpl = (buf[17] & 0x01); 3868c66ac9dbSNicholas Bellinger unreg = (buf[17] & 0x02); 3869c66ac9dbSNicholas Bellinger } 38704949314cSAndy Grover transport_kunmap_data_sg(cmd); 387105d1c7c0SAndy Grover buf = NULL; 387205d1c7c0SAndy Grover 3873c66ac9dbSNicholas Bellinger /* 3874c66ac9dbSNicholas Bellinger * SPEC_I_PT=1 is only valid for Service action: REGISTER 3875c66ac9dbSNicholas Bellinger */ 3876d29a5b6aSChristoph Hellwig if (spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER)) { 387703e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 387803e98c9eSNicholas Bellinger ret = -EINVAL; 3879d29a5b6aSChristoph Hellwig goto out; 3880d29a5b6aSChristoph Hellwig } 3881d29a5b6aSChristoph Hellwig 3882c66ac9dbSNicholas Bellinger /* 3883c66ac9dbSNicholas Bellinger * From spc4r17 section 6.14: 3884c66ac9dbSNicholas Bellinger * 3885c66ac9dbSNicholas Bellinger * If the SPEC_I_PT bit is set to zero, the service action is not 3886c66ac9dbSNicholas Bellinger * REGISTER AND MOVE, and the parameter list length is not 24, then 3887c66ac9dbSNicholas Bellinger * the command shall be terminated with CHECK CONDITION status, with 3888c66ac9dbSNicholas Bellinger * the sense key set to ILLEGAL REQUEST, and the additional sense 3889c66ac9dbSNicholas Bellinger * code set to PARAMETER LIST LENGTH ERROR. 3890c66ac9dbSNicholas Bellinger */ 38916708bb27SAndy Grover if (!spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER_AND_MOVE) && 3892c66ac9dbSNicholas Bellinger (cmd->data_length != 24)) { 38936708bb27SAndy Grover pr_warn("SPC-PR: Received PR OUT illegal parameter" 3894c66ac9dbSNicholas Bellinger " list length: %u\n", cmd->data_length); 389503e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 389603e98c9eSNicholas Bellinger ret = -EINVAL; 3897d29a5b6aSChristoph Hellwig goto out; 3898c66ac9dbSNicholas Bellinger } 3899c66ac9dbSNicholas Bellinger /* 3900c66ac9dbSNicholas Bellinger * (core_scsi3_emulate_pro_* function parameters 3901c66ac9dbSNicholas Bellinger * are defined by spc4r17 Table 174: 3902c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_OUT service actions and valid parameters. 3903c66ac9dbSNicholas Bellinger */ 3904c66ac9dbSNicholas Bellinger switch (sa) { 3905c66ac9dbSNicholas Bellinger case PRO_REGISTER: 3906d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_register(cmd, 3907c66ac9dbSNicholas Bellinger res_key, sa_res_key, aptpl, all_tg_pt, spec_i_pt, 0); 3908d29a5b6aSChristoph Hellwig break; 3909c66ac9dbSNicholas Bellinger case PRO_RESERVE: 3910d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_reserve(cmd, type, scope, res_key); 3911d29a5b6aSChristoph Hellwig break; 3912c66ac9dbSNicholas Bellinger case PRO_RELEASE: 3913d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_release(cmd, type, scope, res_key); 3914d29a5b6aSChristoph Hellwig break; 3915c66ac9dbSNicholas Bellinger case PRO_CLEAR: 3916d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_clear(cmd, res_key); 3917d29a5b6aSChristoph Hellwig break; 3918c66ac9dbSNicholas Bellinger case PRO_PREEMPT: 3919d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_preempt(cmd, type, scope, 3920c66ac9dbSNicholas Bellinger res_key, sa_res_key, 0); 3921d29a5b6aSChristoph Hellwig break; 3922c66ac9dbSNicholas Bellinger case PRO_PREEMPT_AND_ABORT: 3923d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_preempt(cmd, type, scope, 3924c66ac9dbSNicholas Bellinger res_key, sa_res_key, 1); 3925d29a5b6aSChristoph Hellwig break; 3926c66ac9dbSNicholas Bellinger case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: 3927d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_register(cmd, 3928c66ac9dbSNicholas Bellinger 0, sa_res_key, aptpl, all_tg_pt, spec_i_pt, 1); 3929d29a5b6aSChristoph Hellwig break; 3930c66ac9dbSNicholas Bellinger case PRO_REGISTER_AND_MOVE: 3931d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_register_and_move(cmd, res_key, 3932c66ac9dbSNicholas Bellinger sa_res_key, aptpl, unreg); 3933d29a5b6aSChristoph Hellwig break; 3934c66ac9dbSNicholas Bellinger default: 39356708bb27SAndy Grover pr_err("Unknown PERSISTENT_RESERVE_OUT service" 3936c66ac9dbSNicholas Bellinger " action: 0x%02x\n", cdb[1] & 0x1f); 393703e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; 393803e98c9eSNicholas Bellinger ret = -EINVAL; 3939d29a5b6aSChristoph Hellwig break; 3940c66ac9dbSNicholas Bellinger } 3941c66ac9dbSNicholas Bellinger 3942d29a5b6aSChristoph Hellwig out: 3943d29a5b6aSChristoph Hellwig if (!ret) { 3944d29a5b6aSChristoph Hellwig task->task_scsi_status = GOOD; 3945d29a5b6aSChristoph Hellwig transport_complete_task(task, 1); 3946d29a5b6aSChristoph Hellwig } 3947d29a5b6aSChristoph Hellwig return ret; 3948c66ac9dbSNicholas Bellinger } 3949c66ac9dbSNicholas Bellinger 3950c66ac9dbSNicholas Bellinger /* 3951c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_IN Service Action READ_KEYS 3952c66ac9dbSNicholas Bellinger * 3953c66ac9dbSNicholas Bellinger * See spc4r17 section 5.7.6.2 and section 6.13.2, Table 160 3954c66ac9dbSNicholas Bellinger */ 3955c66ac9dbSNicholas Bellinger static int core_scsi3_pri_read_keys(struct se_cmd *cmd) 3956c66ac9dbSNicholas Bellinger { 39575951146dSAndy Grover struct se_device *se_dev = cmd->se_dev; 3958e3d6f909SAndy Grover struct se_subsystem_dev *su_dev = se_dev->se_sub_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); 3971e3d6f909SAndy Grover buf[0] = ((su_dev->t10_pr.pr_generation >> 24) & 0xff); 3972e3d6f909SAndy Grover buf[1] = ((su_dev->t10_pr.pr_generation >> 16) & 0xff); 3973e3d6f909SAndy Grover buf[2] = ((su_dev->t10_pr.pr_generation >> 8) & 0xff); 3974e3d6f909SAndy Grover buf[3] = (su_dev->t10_pr.pr_generation & 0xff); 3975c66ac9dbSNicholas Bellinger 3976e3d6f909SAndy Grover spin_lock(&su_dev->t10_pr.registration_lock); 3977e3d6f909SAndy Grover list_for_each_entry(pr_reg, &su_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 } 3997e3d6f909SAndy Grover spin_unlock(&su_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 { 40165951146dSAndy Grover struct se_device *se_dev = cmd->se_dev; 4017e3d6f909SAndy Grover struct se_subsystem_dev *su_dev = se_dev->se_sub_dev; 4018c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 401905d1c7c0SAndy Grover unsigned char *buf; 4020c66ac9dbSNicholas Bellinger u64 pr_res_key; 4021c66ac9dbSNicholas Bellinger u32 add_len = 16; /* Hardcoded to 16 when a reservation is held. */ 4022c66ac9dbSNicholas Bellinger 4023c66ac9dbSNicholas Bellinger if (cmd->data_length < 8) { 40246708bb27SAndy Grover pr_err("PRIN SA READ_RESERVATIONS SCSI Data Length: %u" 4025c66ac9dbSNicholas Bellinger " too small\n", cmd->data_length); 402603e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; 402703e98c9eSNicholas Bellinger return -EINVAL; 4028c66ac9dbSNicholas Bellinger } 4029c66ac9dbSNicholas Bellinger 40304949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 4031e3d6f909SAndy Grover buf[0] = ((su_dev->t10_pr.pr_generation >> 24) & 0xff); 4032e3d6f909SAndy Grover buf[1] = ((su_dev->t10_pr.pr_generation >> 16) & 0xff); 4033e3d6f909SAndy Grover buf[2] = ((su_dev->t10_pr.pr_generation >> 8) & 0xff); 4034e3d6f909SAndy Grover buf[3] = (su_dev->t10_pr.pr_generation & 0xff); 4035c66ac9dbSNicholas Bellinger 4036c66ac9dbSNicholas Bellinger spin_lock(&se_dev->dev_reservation_lock); 4037c66ac9dbSNicholas Bellinger pr_reg = se_dev->dev_pr_res_holder; 4038c66ac9dbSNicholas Bellinger if ((pr_reg)) { 4039c66ac9dbSNicholas Bellinger /* 4040c66ac9dbSNicholas Bellinger * Set the hardcoded Additional Length 4041c66ac9dbSNicholas Bellinger */ 4042c66ac9dbSNicholas Bellinger buf[4] = ((add_len >> 24) & 0xff); 4043c66ac9dbSNicholas Bellinger buf[5] = ((add_len >> 16) & 0xff); 4044c66ac9dbSNicholas Bellinger buf[6] = ((add_len >> 8) & 0xff); 4045c66ac9dbSNicholas Bellinger buf[7] = (add_len & 0xff); 4046c66ac9dbSNicholas Bellinger 404705d1c7c0SAndy Grover if (cmd->data_length < 22) 404805d1c7c0SAndy Grover goto err; 404905d1c7c0SAndy Grover 4050c66ac9dbSNicholas Bellinger /* 4051c66ac9dbSNicholas Bellinger * Set the Reservation key. 4052c66ac9dbSNicholas Bellinger * 4053c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.10: 4054c66ac9dbSNicholas Bellinger * A persistent reservation holder has its reservation key 4055c66ac9dbSNicholas Bellinger * returned in the parameter data from a PERSISTENT 4056c66ac9dbSNicholas Bellinger * RESERVE IN command with READ RESERVATION service action as 4057c66ac9dbSNicholas Bellinger * follows: 4058c66ac9dbSNicholas Bellinger * a) For a persistent reservation of the type Write Exclusive 4059c66ac9dbSNicholas Bellinger * - All Registrants or Exclusive Access All Regitrants, 4060c66ac9dbSNicholas Bellinger * the reservation key shall be set to zero; or 4061c66ac9dbSNicholas Bellinger * b) For all other persistent reservation types, the 4062c66ac9dbSNicholas Bellinger * reservation key shall be set to the registered 4063c66ac9dbSNicholas Bellinger * reservation key for the I_T nexus that holds the 4064c66ac9dbSNicholas Bellinger * persistent reservation. 4065c66ac9dbSNicholas Bellinger */ 4066c66ac9dbSNicholas Bellinger if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 4067c66ac9dbSNicholas Bellinger (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) 4068c66ac9dbSNicholas Bellinger pr_res_key = 0; 4069c66ac9dbSNicholas Bellinger else 4070c66ac9dbSNicholas Bellinger pr_res_key = pr_reg->pr_res_key; 4071c66ac9dbSNicholas Bellinger 4072c66ac9dbSNicholas Bellinger buf[8] = ((pr_res_key >> 56) & 0xff); 4073c66ac9dbSNicholas Bellinger buf[9] = ((pr_res_key >> 48) & 0xff); 4074c66ac9dbSNicholas Bellinger buf[10] = ((pr_res_key >> 40) & 0xff); 4075c66ac9dbSNicholas Bellinger buf[11] = ((pr_res_key >> 32) & 0xff); 4076c66ac9dbSNicholas Bellinger buf[12] = ((pr_res_key >> 24) & 0xff); 4077c66ac9dbSNicholas Bellinger buf[13] = ((pr_res_key >> 16) & 0xff); 4078c66ac9dbSNicholas Bellinger buf[14] = ((pr_res_key >> 8) & 0xff); 4079c66ac9dbSNicholas Bellinger buf[15] = (pr_res_key & 0xff); 4080c66ac9dbSNicholas Bellinger /* 4081c66ac9dbSNicholas Bellinger * Set the SCOPE and TYPE 4082c66ac9dbSNicholas Bellinger */ 4083c66ac9dbSNicholas Bellinger buf[21] = (pr_reg->pr_res_scope & 0xf0) | 4084c66ac9dbSNicholas Bellinger (pr_reg->pr_res_type & 0x0f); 4085c66ac9dbSNicholas Bellinger } 408605d1c7c0SAndy Grover 408705d1c7c0SAndy Grover err: 4088c66ac9dbSNicholas Bellinger spin_unlock(&se_dev->dev_reservation_lock); 40894949314cSAndy Grover transport_kunmap_data_sg(cmd); 4090c66ac9dbSNicholas Bellinger 4091c66ac9dbSNicholas Bellinger return 0; 4092c66ac9dbSNicholas Bellinger } 4093c66ac9dbSNicholas Bellinger 4094c66ac9dbSNicholas Bellinger /* 4095c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_IN Service Action REPORT_CAPABILITIES 4096c66ac9dbSNicholas Bellinger * 4097c66ac9dbSNicholas Bellinger * See spc4r17 section 6.13.4 Table 165 4098c66ac9dbSNicholas Bellinger */ 4099c66ac9dbSNicholas Bellinger static int core_scsi3_pri_report_capabilities(struct se_cmd *cmd) 4100c66ac9dbSNicholas Bellinger { 41015951146dSAndy Grover struct se_device *dev = cmd->se_dev; 4102e3d6f909SAndy Grover struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; 410305d1c7c0SAndy Grover unsigned char *buf; 4104c66ac9dbSNicholas Bellinger u16 add_len = 8; /* Hardcoded to 8. */ 4105c66ac9dbSNicholas Bellinger 4106c66ac9dbSNicholas Bellinger if (cmd->data_length < 6) { 41076708bb27SAndy Grover pr_err("PRIN SA REPORT_CAPABILITIES SCSI Data Length:" 4108c66ac9dbSNicholas Bellinger " %u too small\n", cmd->data_length); 410903e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; 411003e98c9eSNicholas Bellinger return -EINVAL; 4111c66ac9dbSNicholas Bellinger } 4112c66ac9dbSNicholas Bellinger 41134949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 411405d1c7c0SAndy Grover 4115c66ac9dbSNicholas Bellinger buf[0] = ((add_len << 8) & 0xff); 4116c66ac9dbSNicholas Bellinger buf[1] = (add_len & 0xff); 4117c66ac9dbSNicholas Bellinger buf[2] |= 0x10; /* CRH: Compatible Reservation Hanlding bit. */ 4118c66ac9dbSNicholas Bellinger buf[2] |= 0x08; /* SIP_C: Specify Initiator Ports Capable bit */ 4119c66ac9dbSNicholas Bellinger buf[2] |= 0x04; /* ATP_C: All Target Ports Capable bit */ 4120c66ac9dbSNicholas Bellinger buf[2] |= 0x01; /* PTPL_C: Persistence across Target Power Loss bit */ 4121c66ac9dbSNicholas Bellinger /* 4122c66ac9dbSNicholas Bellinger * We are filling in the PERSISTENT RESERVATION TYPE MASK below, so 4123c66ac9dbSNicholas Bellinger * set the TMV: Task Mask Valid bit. 4124c66ac9dbSNicholas Bellinger */ 4125c66ac9dbSNicholas Bellinger buf[3] |= 0x80; 4126c66ac9dbSNicholas Bellinger /* 4127c66ac9dbSNicholas Bellinger * Change ALLOW COMMANDs to 0x20 or 0x40 later from Table 166 4128c66ac9dbSNicholas Bellinger */ 4129c66ac9dbSNicholas Bellinger buf[3] |= 0x10; /* ALLOW COMMANDs field 001b */ 4130c66ac9dbSNicholas Bellinger /* 4131c66ac9dbSNicholas Bellinger * PTPL_A: Persistence across Target Power Loss Active bit 4132c66ac9dbSNicholas Bellinger */ 4133c66ac9dbSNicholas Bellinger if (pr_tmpl->pr_aptpl_active) 4134c66ac9dbSNicholas Bellinger buf[3] |= 0x01; 4135c66ac9dbSNicholas Bellinger /* 4136c66ac9dbSNicholas Bellinger * Setup the PERSISTENT RESERVATION TYPE MASK from Table 167 4137c66ac9dbSNicholas Bellinger */ 4138c66ac9dbSNicholas Bellinger buf[4] |= 0x80; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ 4139c66ac9dbSNicholas Bellinger buf[4] |= 0x40; /* PR_TYPE_EXCLUSIVE_ACCESS_REGONLY */ 4140c66ac9dbSNicholas Bellinger buf[4] |= 0x20; /* PR_TYPE_WRITE_EXCLUSIVE_REGONLY */ 4141c66ac9dbSNicholas Bellinger buf[4] |= 0x08; /* PR_TYPE_EXCLUSIVE_ACCESS */ 4142c66ac9dbSNicholas Bellinger buf[4] |= 0x02; /* PR_TYPE_WRITE_EXCLUSIVE */ 4143c66ac9dbSNicholas Bellinger buf[5] |= 0x01; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ 4144c66ac9dbSNicholas Bellinger 41454949314cSAndy Grover transport_kunmap_data_sg(cmd); 414605d1c7c0SAndy Grover 4147c66ac9dbSNicholas Bellinger return 0; 4148c66ac9dbSNicholas Bellinger } 4149c66ac9dbSNicholas Bellinger 4150c66ac9dbSNicholas Bellinger /* 4151c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_IN Service Action READ_FULL_STATUS 4152c66ac9dbSNicholas Bellinger * 4153c66ac9dbSNicholas Bellinger * See spc4r17 section 6.13.5 Table 168 and 169 4154c66ac9dbSNicholas Bellinger */ 4155c66ac9dbSNicholas Bellinger static int core_scsi3_pri_read_full_status(struct se_cmd *cmd) 4156c66ac9dbSNicholas Bellinger { 41575951146dSAndy Grover struct se_device *se_dev = cmd->se_dev; 4158c66ac9dbSNicholas Bellinger struct se_node_acl *se_nacl; 4159e3d6f909SAndy Grover struct se_subsystem_dev *su_dev = se_dev->se_sub_dev; 4160c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg; 4161c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp; 4162e3d6f909SAndy Grover struct t10_reservation *pr_tmpl = &se_dev->se_sub_dev->t10_pr; 416305d1c7c0SAndy Grover unsigned char *buf; 4164c66ac9dbSNicholas Bellinger u32 add_desc_len = 0, add_len = 0, desc_len, exp_desc_len; 4165c66ac9dbSNicholas Bellinger u32 off = 8; /* off into first Full Status descriptor */ 4166c66ac9dbSNicholas Bellinger int format_code = 0; 4167c66ac9dbSNicholas Bellinger 4168c66ac9dbSNicholas Bellinger if (cmd->data_length < 8) { 41696708bb27SAndy Grover pr_err("PRIN SA READ_FULL_STATUS SCSI Data Length: %u" 4170c66ac9dbSNicholas Bellinger " too small\n", cmd->data_length); 417103e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; 417203e98c9eSNicholas Bellinger return -EINVAL; 4173c66ac9dbSNicholas Bellinger } 4174c66ac9dbSNicholas Bellinger 41754949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 417605d1c7c0SAndy Grover 4177e3d6f909SAndy Grover buf[0] = ((su_dev->t10_pr.pr_generation >> 24) & 0xff); 4178e3d6f909SAndy Grover buf[1] = ((su_dev->t10_pr.pr_generation >> 16) & 0xff); 4179e3d6f909SAndy Grover buf[2] = ((su_dev->t10_pr.pr_generation >> 8) & 0xff); 4180e3d6f909SAndy Grover buf[3] = (su_dev->t10_pr.pr_generation & 0xff); 4181c66ac9dbSNicholas Bellinger 4182c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 4183c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 4184c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 4185c66ac9dbSNicholas Bellinger 4186c66ac9dbSNicholas Bellinger se_nacl = pr_reg->pr_reg_nacl; 4187c66ac9dbSNicholas Bellinger se_tpg = pr_reg->pr_reg_nacl->se_tpg; 4188c66ac9dbSNicholas Bellinger add_desc_len = 0; 4189c66ac9dbSNicholas Bellinger 4190c66ac9dbSNicholas Bellinger atomic_inc(&pr_reg->pr_res_holders); 4191c66ac9dbSNicholas Bellinger smp_mb__after_atomic_inc(); 4192c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 4193c66ac9dbSNicholas Bellinger /* 4194c66ac9dbSNicholas Bellinger * Determine expected length of $FABRIC_MOD specific 4195c66ac9dbSNicholas Bellinger * TransportID full status descriptor.. 4196c66ac9dbSNicholas Bellinger */ 4197e3d6f909SAndy Grover exp_desc_len = se_tpg->se_tpg_tfo->tpg_get_pr_transport_id_len( 4198c66ac9dbSNicholas Bellinger se_tpg, se_nacl, pr_reg, &format_code); 4199c66ac9dbSNicholas Bellinger 4200c66ac9dbSNicholas Bellinger if ((exp_desc_len + add_len) > cmd->data_length) { 42016708bb27SAndy Grover pr_warn("SPC-3 PRIN READ_FULL_STATUS ran" 4202c66ac9dbSNicholas Bellinger " out of buffer: %d\n", cmd->data_length); 4203c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 4204c66ac9dbSNicholas Bellinger atomic_dec(&pr_reg->pr_res_holders); 4205c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 4206c66ac9dbSNicholas Bellinger break; 4207c66ac9dbSNicholas Bellinger } 4208c66ac9dbSNicholas Bellinger /* 4209c66ac9dbSNicholas Bellinger * Set RESERVATION KEY 4210c66ac9dbSNicholas Bellinger */ 4211c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff); 4212c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff); 4213c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff); 4214c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff); 4215c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff); 4216c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff); 4217c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff); 4218c66ac9dbSNicholas Bellinger buf[off++] = (pr_reg->pr_res_key & 0xff); 4219c66ac9dbSNicholas Bellinger off += 4; /* Skip Over Reserved area */ 4220c66ac9dbSNicholas Bellinger 4221c66ac9dbSNicholas Bellinger /* 4222c66ac9dbSNicholas Bellinger * Set ALL_TG_PT bit if PROUT SA REGISTER had this set. 4223c66ac9dbSNicholas Bellinger */ 4224c66ac9dbSNicholas Bellinger if (pr_reg->pr_reg_all_tg_pt) 4225c66ac9dbSNicholas Bellinger buf[off] = 0x02; 4226c66ac9dbSNicholas Bellinger /* 4227c66ac9dbSNicholas Bellinger * The struct se_lun pointer will be present for the 4228c66ac9dbSNicholas Bellinger * reservation holder for PR_HOLDER bit. 4229c66ac9dbSNicholas Bellinger * 4230c66ac9dbSNicholas Bellinger * Also, if this registration is the reservation 4231c66ac9dbSNicholas Bellinger * holder, fill in SCOPE and TYPE in the next byte. 4232c66ac9dbSNicholas Bellinger */ 4233c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_holder) { 4234c66ac9dbSNicholas Bellinger buf[off++] |= 0x01; 4235c66ac9dbSNicholas Bellinger buf[off++] = (pr_reg->pr_res_scope & 0xf0) | 4236c66ac9dbSNicholas Bellinger (pr_reg->pr_res_type & 0x0f); 4237c66ac9dbSNicholas Bellinger } else 4238c66ac9dbSNicholas Bellinger off += 2; 4239c66ac9dbSNicholas Bellinger 4240c66ac9dbSNicholas Bellinger off += 4; /* Skip over reserved area */ 4241c66ac9dbSNicholas Bellinger /* 4242c66ac9dbSNicholas Bellinger * From spc4r17 6.3.15: 4243c66ac9dbSNicholas Bellinger * 4244c66ac9dbSNicholas Bellinger * If the ALL_TG_PT bit set to zero, the RELATIVE TARGET PORT 4245c66ac9dbSNicholas Bellinger * IDENTIFIER field contains the relative port identifier (see 4246c66ac9dbSNicholas Bellinger * 3.1.120) of the target port that is part of the I_T nexus 4247c66ac9dbSNicholas Bellinger * described by this full status descriptor. If the ALL_TG_PT 4248c66ac9dbSNicholas Bellinger * bit is set to one, the contents of the RELATIVE TARGET PORT 4249c66ac9dbSNicholas Bellinger * IDENTIFIER field are not defined by this standard. 4250c66ac9dbSNicholas Bellinger */ 42516708bb27SAndy Grover if (!pr_reg->pr_reg_all_tg_pt) { 4252c66ac9dbSNicholas Bellinger struct se_port *port = pr_reg->pr_reg_tg_pt_lun->lun_sep; 4253c66ac9dbSNicholas Bellinger 4254c66ac9dbSNicholas Bellinger buf[off++] = ((port->sep_rtpi >> 8) & 0xff); 4255c66ac9dbSNicholas Bellinger buf[off++] = (port->sep_rtpi & 0xff); 4256c66ac9dbSNicholas Bellinger } else 4257c66ac9dbSNicholas Bellinger off += 2; /* Skip over RELATIVE TARGET PORT IDENTIFER */ 4258c66ac9dbSNicholas Bellinger 4259c66ac9dbSNicholas Bellinger /* 4260c66ac9dbSNicholas Bellinger * Now, have the $FABRIC_MOD fill in the protocol identifier 4261c66ac9dbSNicholas Bellinger */ 4262e3d6f909SAndy Grover desc_len = se_tpg->se_tpg_tfo->tpg_get_pr_transport_id(se_tpg, 4263c66ac9dbSNicholas Bellinger se_nacl, pr_reg, &format_code, &buf[off+4]); 4264c66ac9dbSNicholas Bellinger 4265c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 4266c66ac9dbSNicholas Bellinger atomic_dec(&pr_reg->pr_res_holders); 4267c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 4268c66ac9dbSNicholas Bellinger /* 4269c66ac9dbSNicholas Bellinger * Set the ADDITIONAL DESCRIPTOR LENGTH 4270c66ac9dbSNicholas Bellinger */ 4271c66ac9dbSNicholas Bellinger buf[off++] = ((desc_len >> 24) & 0xff); 4272c66ac9dbSNicholas Bellinger buf[off++] = ((desc_len >> 16) & 0xff); 4273c66ac9dbSNicholas Bellinger buf[off++] = ((desc_len >> 8) & 0xff); 4274c66ac9dbSNicholas Bellinger buf[off++] = (desc_len & 0xff); 4275c66ac9dbSNicholas Bellinger /* 4276c66ac9dbSNicholas Bellinger * Size of full desctipor header minus TransportID 4277c66ac9dbSNicholas Bellinger * containing $FABRIC_MOD specific) initiator device/port 4278c66ac9dbSNicholas Bellinger * WWN information. 4279c66ac9dbSNicholas Bellinger * 4280c66ac9dbSNicholas Bellinger * See spc4r17 Section 6.13.5 Table 169 4281c66ac9dbSNicholas Bellinger */ 4282c66ac9dbSNicholas Bellinger add_desc_len = (24 + desc_len); 4283c66ac9dbSNicholas Bellinger 4284c66ac9dbSNicholas Bellinger off += desc_len; 4285c66ac9dbSNicholas Bellinger add_len += add_desc_len; 4286c66ac9dbSNicholas Bellinger } 4287c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 4288c66ac9dbSNicholas Bellinger /* 4289c66ac9dbSNicholas Bellinger * Set ADDITIONAL_LENGTH 4290c66ac9dbSNicholas Bellinger */ 4291c66ac9dbSNicholas Bellinger buf[4] = ((add_len >> 24) & 0xff); 4292c66ac9dbSNicholas Bellinger buf[5] = ((add_len >> 16) & 0xff); 4293c66ac9dbSNicholas Bellinger buf[6] = ((add_len >> 8) & 0xff); 4294c66ac9dbSNicholas Bellinger buf[7] = (add_len & 0xff); 4295c66ac9dbSNicholas Bellinger 42964949314cSAndy Grover transport_kunmap_data_sg(cmd); 429705d1c7c0SAndy Grover 4298c66ac9dbSNicholas Bellinger return 0; 4299c66ac9dbSNicholas Bellinger } 4300c66ac9dbSNicholas Bellinger 4301e76a35d6SChristoph Hellwig int target_scsi3_emulate_pr_in(struct se_task *task) 4302c66ac9dbSNicholas Bellinger { 4303e76a35d6SChristoph Hellwig struct se_cmd *cmd = task->task_se_cmd; 4304d29a5b6aSChristoph Hellwig int ret; 4305e76a35d6SChristoph Hellwig 4306617c0e06SChristoph Hellwig /* 4307617c0e06SChristoph Hellwig * Following spc2r20 5.5.1 Reservations overview: 4308617c0e06SChristoph Hellwig * 4309617c0e06SChristoph Hellwig * If a logical unit has been reserved by any RESERVE command and is 4310617c0e06SChristoph Hellwig * still reserved by any initiator, all PERSISTENT RESERVE IN and all 4311617c0e06SChristoph Hellwig * PERSISTENT RESERVE OUT commands shall conflict regardless of 4312617c0e06SChristoph Hellwig * initiator or service action and shall terminate with a RESERVATION 4313617c0e06SChristoph Hellwig * CONFLICT status. 4314617c0e06SChristoph Hellwig */ 4315617c0e06SChristoph Hellwig if (cmd->se_dev->dev_flags & DF_SPC2_RESERVATIONS) { 4316617c0e06SChristoph Hellwig pr_err("Received PERSISTENT_RESERVE CDB while legacy" 4317617c0e06SChristoph Hellwig " SPC-2 reservation is held, returning" 4318617c0e06SChristoph Hellwig " RESERVATION_CONFLICT\n"); 431903e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; 432003e98c9eSNicholas Bellinger return -EINVAL; 4321617c0e06SChristoph Hellwig } 4322617c0e06SChristoph Hellwig 4323617c0e06SChristoph Hellwig switch (cmd->t_task_cdb[1] & 0x1f) { 4324c66ac9dbSNicholas Bellinger case PRI_READ_KEYS: 4325d29a5b6aSChristoph Hellwig ret = core_scsi3_pri_read_keys(cmd); 4326d29a5b6aSChristoph Hellwig break; 4327c66ac9dbSNicholas Bellinger case PRI_READ_RESERVATION: 4328d29a5b6aSChristoph Hellwig ret = core_scsi3_pri_read_reservation(cmd); 4329d29a5b6aSChristoph Hellwig break; 4330c66ac9dbSNicholas Bellinger case PRI_REPORT_CAPABILITIES: 4331d29a5b6aSChristoph Hellwig ret = core_scsi3_pri_report_capabilities(cmd); 4332d29a5b6aSChristoph Hellwig break; 4333c66ac9dbSNicholas Bellinger case PRI_READ_FULL_STATUS: 4334d29a5b6aSChristoph Hellwig ret = core_scsi3_pri_read_full_status(cmd); 4335d29a5b6aSChristoph Hellwig break; 4336c66ac9dbSNicholas Bellinger default: 43376708bb27SAndy Grover pr_err("Unknown PERSISTENT_RESERVE_IN service" 4338617c0e06SChristoph Hellwig " action: 0x%02x\n", cmd->t_task_cdb[1] & 0x1f); 433903e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; 434003e98c9eSNicholas Bellinger ret = -EINVAL; 4341d29a5b6aSChristoph Hellwig break; 4342c66ac9dbSNicholas Bellinger } 4343d29a5b6aSChristoph Hellwig 4344d29a5b6aSChristoph Hellwig if (!ret) { 4345d29a5b6aSChristoph Hellwig task->task_scsi_status = GOOD; 4346d29a5b6aSChristoph Hellwig transport_complete_task(task, 1); 4347d29a5b6aSChristoph Hellwig } 4348d29a5b6aSChristoph Hellwig return ret; 4349c66ac9dbSNicholas Bellinger } 4350c66ac9dbSNicholas Bellinger 4351c66ac9dbSNicholas Bellinger static int core_pt_reservation_check(struct se_cmd *cmd, u32 *pr_res_type) 4352c66ac9dbSNicholas Bellinger { 4353c66ac9dbSNicholas Bellinger return 0; 4354c66ac9dbSNicholas Bellinger } 4355c66ac9dbSNicholas Bellinger 4356c66ac9dbSNicholas Bellinger static int core_pt_seq_non_holder( 4357c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 4358c66ac9dbSNicholas Bellinger unsigned char *cdb, 4359c66ac9dbSNicholas Bellinger u32 pr_reg_type) 4360c66ac9dbSNicholas Bellinger { 4361c66ac9dbSNicholas Bellinger return 0; 4362c66ac9dbSNicholas Bellinger } 4363c66ac9dbSNicholas Bellinger 4364c66ac9dbSNicholas Bellinger int core_setup_reservations(struct se_device *dev, int force_pt) 4365c66ac9dbSNicholas Bellinger { 4366c66ac9dbSNicholas Bellinger struct se_subsystem_dev *su_dev = dev->se_sub_dev; 4367e3d6f909SAndy Grover struct t10_reservation *rest = &su_dev->t10_pr; 4368c66ac9dbSNicholas Bellinger /* 4369c66ac9dbSNicholas Bellinger * If this device is from Target_Core_Mod/pSCSI, use the reservations 4370c66ac9dbSNicholas Bellinger * of the Underlying SCSI hardware. In Linux/SCSI terms, this can 4371c66ac9dbSNicholas Bellinger * cause a problem because libata and some SATA RAID HBAs appear 4372c66ac9dbSNicholas Bellinger * under Linux/SCSI, but to emulate reservations themselves. 4373c66ac9dbSNicholas Bellinger */ 4374e3d6f909SAndy Grover if (((dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) && 4375e3d6f909SAndy Grover !(dev->se_sub_dev->se_dev_attrib.emulate_reservations)) || force_pt) { 4376c66ac9dbSNicholas Bellinger rest->res_type = SPC_PASSTHROUGH; 4377c66ac9dbSNicholas Bellinger rest->pr_ops.t10_reservation_check = &core_pt_reservation_check; 4378c66ac9dbSNicholas Bellinger rest->pr_ops.t10_seq_non_holder = &core_pt_seq_non_holder; 43796708bb27SAndy Grover pr_debug("%s: Using SPC_PASSTHROUGH, no reservation" 4380e3d6f909SAndy Grover " emulation\n", dev->transport->name); 4381c66ac9dbSNicholas Bellinger return 0; 4382c66ac9dbSNicholas Bellinger } 4383c66ac9dbSNicholas Bellinger /* 4384c66ac9dbSNicholas Bellinger * If SPC-3 or above is reported by real or emulated struct se_device, 4385c66ac9dbSNicholas Bellinger * use emulated Persistent Reservations. 4386c66ac9dbSNicholas Bellinger */ 4387e3d6f909SAndy Grover if (dev->transport->get_device_rev(dev) >= SCSI_3) { 4388c66ac9dbSNicholas Bellinger rest->res_type = SPC3_PERSISTENT_RESERVATIONS; 4389c66ac9dbSNicholas Bellinger rest->pr_ops.t10_reservation_check = &core_scsi3_pr_reservation_check; 4390c66ac9dbSNicholas Bellinger rest->pr_ops.t10_seq_non_holder = &core_scsi3_pr_seq_non_holder; 43916708bb27SAndy Grover pr_debug("%s: Using SPC3_PERSISTENT_RESERVATIONS" 4392e3d6f909SAndy Grover " emulation\n", dev->transport->name); 4393c66ac9dbSNicholas Bellinger } else { 4394c66ac9dbSNicholas Bellinger rest->res_type = SPC2_RESERVATIONS; 4395c66ac9dbSNicholas Bellinger rest->pr_ops.t10_reservation_check = &core_scsi2_reservation_check; 4396c66ac9dbSNicholas Bellinger rest->pr_ops.t10_seq_non_holder = 4397c66ac9dbSNicholas Bellinger &core_scsi2_reservation_seq_non_holder; 43986708bb27SAndy Grover pr_debug("%s: Using SPC2_RESERVATIONS emulation\n", 4399e3d6f909SAndy Grover dev->transport->name); 4400c66ac9dbSNicholas Bellinger } 4401c66ac9dbSNicholas Bellinger 4402c66ac9dbSNicholas Bellinger return 0; 4403c66ac9dbSNicholas Bellinger } 4404