1c66ac9dbSNicholas Bellinger /******************************************************************************* 2c66ac9dbSNicholas Bellinger * Filename: target_core_pr.c 3c66ac9dbSNicholas Bellinger * 4c66ac9dbSNicholas Bellinger * This file contains SPC-3 compliant persistent reservations and 5c66ac9dbSNicholas Bellinger * legacy SPC-2 reservations with compatible reservation handling (CRH=1) 6c66ac9dbSNicholas Bellinger * 74c76251eSNicholas Bellinger * (c) Copyright 2009-2013 Datera, Inc. 8c66ac9dbSNicholas Bellinger * 9c66ac9dbSNicholas Bellinger * Nicholas A. Bellinger <nab@kernel.org> 10c66ac9dbSNicholas Bellinger * 11c66ac9dbSNicholas Bellinger * This program is free software; you can redistribute it and/or modify 12c66ac9dbSNicholas Bellinger * it under the terms of the GNU General Public License as published by 13c66ac9dbSNicholas Bellinger * the Free Software Foundation; either version 2 of the License, or 14c66ac9dbSNicholas Bellinger * (at your option) any later version. 15c66ac9dbSNicholas Bellinger * 16c66ac9dbSNicholas Bellinger * This program is distributed in the hope that it will be useful, 17c66ac9dbSNicholas Bellinger * but WITHOUT ANY WARRANTY; without even the implied warranty of 18c66ac9dbSNicholas Bellinger * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19c66ac9dbSNicholas Bellinger * GNU General Public License for more details. 20c66ac9dbSNicholas Bellinger * 21c66ac9dbSNicholas Bellinger * You should have received a copy of the GNU General Public License 22c66ac9dbSNicholas Bellinger * along with this program; if not, write to the Free Software 23c66ac9dbSNicholas Bellinger * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 24c66ac9dbSNicholas Bellinger * 25c66ac9dbSNicholas Bellinger ******************************************************************************/ 26c66ac9dbSNicholas Bellinger 27c66ac9dbSNicholas Bellinger #include <linux/slab.h> 28c66ac9dbSNicholas Bellinger #include <linux/spinlock.h> 29c66ac9dbSNicholas Bellinger #include <linux/list.h> 305538d294SDavid S. Miller #include <linux/vmalloc.h> 310e9b10a9SAl Viro #include <linux/file.h> 328dcf07beSBart Van Assche #include <linux/fcntl.h> 338dcf07beSBart Van Assche #include <linux/fs.h> 34ba929992SBart Van Assche #include <scsi/scsi_proto.h> 35c66ac9dbSNicholas Bellinger #include <asm/unaligned.h> 36c66ac9dbSNicholas Bellinger 37c66ac9dbSNicholas Bellinger #include <target/target_core_base.h> 38c4795fb2SChristoph Hellwig #include <target/target_core_backend.h> 39c4795fb2SChristoph Hellwig #include <target/target_core_fabric.h> 40c66ac9dbSNicholas Bellinger 41e26d99aeSChristoph Hellwig #include "target_core_internal.h" 42c66ac9dbSNicholas Bellinger #include "target_core_pr.h" 43c66ac9dbSNicholas Bellinger #include "target_core_ua.h" 44c66ac9dbSNicholas Bellinger 45c66ac9dbSNicholas Bellinger /* 46c66ac9dbSNicholas Bellinger * Used for Specify Initiator Ports Capable Bit (SPEC_I_PT) 47c66ac9dbSNicholas Bellinger */ 48c66ac9dbSNicholas Bellinger struct pr_transport_id_holder { 49c66ac9dbSNicholas Bellinger struct t10_pr_registration *dest_pr_reg; 50c66ac9dbSNicholas Bellinger struct se_portal_group *dest_tpg; 51c66ac9dbSNicholas Bellinger struct se_node_acl *dest_node_acl; 52c66ac9dbSNicholas Bellinger struct se_dev_entry *dest_se_deve; 53c66ac9dbSNicholas Bellinger struct list_head dest_list; 54c66ac9dbSNicholas Bellinger }; 55c66ac9dbSNicholas Bellinger 56d2843c17SAndy Grover void core_pr_dump_initiator_port( 57c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 58c66ac9dbSNicholas Bellinger char *buf, 59c66ac9dbSNicholas Bellinger u32 size) 60c66ac9dbSNicholas Bellinger { 6124528f08Stangwenji if (!pr_reg->isid_present_at_reg) { 62d2843c17SAndy Grover buf[0] = '\0'; 6324528f08Stangwenji return; 6424528f08Stangwenji } 65c66ac9dbSNicholas Bellinger 66d2843c17SAndy Grover snprintf(buf, size, ",i,0x%s", pr_reg->pr_reg_isid); 67c66ac9dbSNicholas Bellinger } 68c66ac9dbSNicholas Bellinger 6933ce6a87SAndy Grover enum register_type { 7033ce6a87SAndy Grover REGISTER, 7133ce6a87SAndy Grover REGISTER_AND_IGNORE_EXISTING_KEY, 7233ce6a87SAndy Grover REGISTER_AND_MOVE, 7333ce6a87SAndy Grover }; 7433ce6a87SAndy Grover 7533ce6a87SAndy Grover enum preempt_type { 7633ce6a87SAndy Grover PREEMPT, 7733ce6a87SAndy Grover PREEMPT_AND_ABORT, 7833ce6a87SAndy Grover }; 7933ce6a87SAndy Grover 80c66ac9dbSNicholas Bellinger static void __core_scsi3_complete_pro_release(struct se_device *, struct se_node_acl *, 816c3c9baaSNicholas Bellinger struct t10_pr_registration *, int, int); 82c66ac9dbSNicholas Bellinger 83e673dc92SIlias Tsitsimpis static int is_reservation_holder( 84e673dc92SIlias Tsitsimpis struct t10_pr_registration *pr_res_holder, 85e673dc92SIlias Tsitsimpis struct t10_pr_registration *pr_reg) 86e673dc92SIlias Tsitsimpis { 87e673dc92SIlias Tsitsimpis int pr_res_type; 88e673dc92SIlias Tsitsimpis 89e673dc92SIlias Tsitsimpis if (pr_res_holder) { 90e673dc92SIlias Tsitsimpis pr_res_type = pr_res_holder->pr_res_type; 91e673dc92SIlias Tsitsimpis 92e673dc92SIlias Tsitsimpis return pr_res_holder == pr_reg || 93e673dc92SIlias Tsitsimpis pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG || 94e673dc92SIlias Tsitsimpis pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG; 95e673dc92SIlias Tsitsimpis } 96e673dc92SIlias Tsitsimpis return 0; 97e673dc92SIlias Tsitsimpis } 98e673dc92SIlias Tsitsimpis 99de103c93SChristoph Hellwig static sense_reason_t 100de103c93SChristoph Hellwig target_scsi2_reservation_check(struct se_cmd *cmd) 101c66ac9dbSNicholas Bellinger { 102d977f437SChristoph Hellwig struct se_device *dev = cmd->se_dev; 103d977f437SChristoph Hellwig struct se_session *sess = cmd->se_sess; 104d977f437SChristoph Hellwig 105d977f437SChristoph Hellwig switch (cmd->t_task_cdb[0]) { 106c66ac9dbSNicholas Bellinger case INQUIRY: 107c66ac9dbSNicholas Bellinger case RELEASE: 108c66ac9dbSNicholas Bellinger case RELEASE_10: 109c66ac9dbSNicholas Bellinger return 0; 110c66ac9dbSNicholas Bellinger default: 111d977f437SChristoph Hellwig break; 112c66ac9dbSNicholas Bellinger } 113c66ac9dbSNicholas Bellinger 114d977f437SChristoph Hellwig if (!dev->dev_reserved_node_acl || !sess) 115c66ac9dbSNicholas Bellinger return 0; 116c66ac9dbSNicholas Bellinger 117d977f437SChristoph Hellwig if (dev->dev_reserved_node_acl != sess->se_node_acl) 118de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 119c66ac9dbSNicholas Bellinger 120d977f437SChristoph Hellwig if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS_WITH_ISID) { 121d977f437SChristoph Hellwig if (dev->dev_res_bin_isid != sess->sess_bin_isid) 122de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 123d977f437SChristoph Hellwig } 124d977f437SChristoph Hellwig 125d977f437SChristoph Hellwig return 0; 126c66ac9dbSNicholas Bellinger } 127c66ac9dbSNicholas Bellinger 128eacac00cSChristoph Hellwig static struct t10_pr_registration *core_scsi3_locate_pr_reg(struct se_device *, 129eacac00cSChristoph Hellwig struct se_node_acl *, struct se_session *); 130eacac00cSChristoph Hellwig static void core_scsi3_put_pr_reg(struct t10_pr_registration *); 131eacac00cSChristoph Hellwig 132087a03b3SNicholas Bellinger static int target_check_scsi2_reservation_conflict(struct se_cmd *cmd) 133eacac00cSChristoph Hellwig { 134eacac00cSChristoph Hellwig struct se_session *se_sess = cmd->se_sess; 1350fd97ccfSChristoph Hellwig struct se_device *dev = cmd->se_dev; 136eacac00cSChristoph Hellwig struct t10_pr_registration *pr_reg; 1370fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 138eacac00cSChristoph Hellwig int conflict = 0; 139eacac00cSChristoph Hellwig 140eacac00cSChristoph Hellwig pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, 141eacac00cSChristoph Hellwig se_sess); 142eacac00cSChristoph Hellwig if (pr_reg) { 143eacac00cSChristoph Hellwig /* 144eacac00cSChristoph Hellwig * From spc4r17 5.7.3 Exceptions to SPC-2 RESERVE and RELEASE 145eacac00cSChristoph Hellwig * behavior 146eacac00cSChristoph Hellwig * 147eacac00cSChristoph Hellwig * A RESERVE(6) or RESERVE(10) command shall complete with GOOD 148eacac00cSChristoph Hellwig * status, but no reservation shall be established and the 149eacac00cSChristoph Hellwig * persistent reservation shall not be changed, if the command 150eacac00cSChristoph Hellwig * is received from a) and b) below. 151eacac00cSChristoph Hellwig * 152eacac00cSChristoph Hellwig * A RELEASE(6) or RELEASE(10) command shall complete with GOOD 153eacac00cSChristoph Hellwig * status, but the persistent reservation shall not be released, 154eacac00cSChristoph Hellwig * if the command is received from a) and b) 155eacac00cSChristoph Hellwig * 156eacac00cSChristoph Hellwig * a) An I_T nexus that is a persistent reservation holder; or 157eacac00cSChristoph Hellwig * b) An I_T nexus that is registered if a registrants only or 158eacac00cSChristoph Hellwig * all registrants type persistent reservation is present. 159eacac00cSChristoph Hellwig * 160eacac00cSChristoph Hellwig * In all other cases, a RESERVE(6) command, RESERVE(10) command, 161eacac00cSChristoph Hellwig * RELEASE(6) command, or RELEASE(10) command shall be processed 162eacac00cSChristoph Hellwig * as defined in SPC-2. 163eacac00cSChristoph Hellwig */ 164eacac00cSChristoph Hellwig if (pr_reg->pr_res_holder) { 165eacac00cSChristoph Hellwig core_scsi3_put_pr_reg(pr_reg); 166087a03b3SNicholas Bellinger return 1; 167eacac00cSChristoph Hellwig } 168eacac00cSChristoph Hellwig if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY) || 169eacac00cSChristoph Hellwig (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) || 170eacac00cSChristoph Hellwig (pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 171eacac00cSChristoph Hellwig (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { 172eacac00cSChristoph Hellwig core_scsi3_put_pr_reg(pr_reg); 173087a03b3SNicholas Bellinger return 1; 174eacac00cSChristoph Hellwig } 175eacac00cSChristoph Hellwig core_scsi3_put_pr_reg(pr_reg); 176eacac00cSChristoph Hellwig conflict = 1; 177eacac00cSChristoph Hellwig } else { 178eacac00cSChristoph Hellwig /* 179eacac00cSChristoph Hellwig * Following spc2r20 5.5.1 Reservations overview: 180eacac00cSChristoph Hellwig * 181eacac00cSChristoph Hellwig * If a logical unit has executed a PERSISTENT RESERVE OUT 182eacac00cSChristoph Hellwig * command with the REGISTER or the REGISTER AND IGNORE 183eacac00cSChristoph Hellwig * EXISTING KEY service action and is still registered by any 184eacac00cSChristoph Hellwig * initiator, all RESERVE commands and all RELEASE commands 185eacac00cSChristoph Hellwig * regardless of initiator shall conflict and shall terminate 186eacac00cSChristoph Hellwig * with a RESERVATION CONFLICT status. 187eacac00cSChristoph Hellwig */ 188eacac00cSChristoph Hellwig spin_lock(&pr_tmpl->registration_lock); 189eacac00cSChristoph Hellwig conflict = (list_empty(&pr_tmpl->registration_list)) ? 0 : 1; 190eacac00cSChristoph Hellwig spin_unlock(&pr_tmpl->registration_lock); 191eacac00cSChristoph Hellwig } 192eacac00cSChristoph Hellwig 193eacac00cSChristoph Hellwig if (conflict) { 194eacac00cSChristoph Hellwig pr_err("Received legacy SPC-2 RESERVE/RELEASE" 195eacac00cSChristoph Hellwig " while active SPC-3 registrations exist," 196eacac00cSChristoph Hellwig " returning RESERVATION_CONFLICT\n"); 197087a03b3SNicholas Bellinger return -EBUSY; 198eacac00cSChristoph Hellwig } 199eacac00cSChristoph Hellwig 200087a03b3SNicholas Bellinger return 0; 201eacac00cSChristoph Hellwig } 202eacac00cSChristoph Hellwig 203de103c93SChristoph Hellwig sense_reason_t 204de103c93SChristoph Hellwig target_scsi2_reservation_release(struct se_cmd *cmd) 205c66ac9dbSNicholas Bellinger { 206c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 207c66ac9dbSNicholas Bellinger struct se_session *sess = cmd->se_sess; 208609234e3SWei Yongjun struct se_portal_group *tpg; 209de103c93SChristoph Hellwig int rc; 210c66ac9dbSNicholas Bellinger 211609234e3SWei Yongjun if (!sess || !sess->se_tpg) 212d29a5b6aSChristoph Hellwig goto out; 213087a03b3SNicholas Bellinger rc = target_check_scsi2_reservation_conflict(cmd); 214087a03b3SNicholas Bellinger if (rc == 1) 215d29a5b6aSChristoph Hellwig goto out; 216de103c93SChristoph Hellwig if (rc < 0) 217de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 218c66ac9dbSNicholas Bellinger 219c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 220d29a5b6aSChristoph Hellwig if (!dev->dev_reserved_node_acl || !sess) 221d29a5b6aSChristoph Hellwig goto out_unlock; 222c66ac9dbSNicholas Bellinger 223d29a5b6aSChristoph Hellwig if (dev->dev_reserved_node_acl != sess->se_node_acl) 224d29a5b6aSChristoph Hellwig goto out_unlock; 225d29a5b6aSChristoph Hellwig 226edc318d9SBernhard Kohl if (dev->dev_res_bin_isid != sess->sess_bin_isid) 227edc318d9SBernhard Kohl goto out_unlock; 228edc318d9SBernhard Kohl 229c66ac9dbSNicholas Bellinger dev->dev_reserved_node_acl = NULL; 2300fd97ccfSChristoph Hellwig dev->dev_reservation_flags &= ~DRF_SPC2_RESERVATIONS; 2310fd97ccfSChristoph Hellwig if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS_WITH_ISID) { 232c66ac9dbSNicholas Bellinger dev->dev_res_bin_isid = 0; 2330fd97ccfSChristoph Hellwig dev->dev_reservation_flags &= ~DRF_SPC2_RESERVATIONS_WITH_ISID; 234c66ac9dbSNicholas Bellinger } 235609234e3SWei Yongjun tpg = sess->se_tpg; 236f2d30680SHannes Reinecke pr_debug("SCSI-2 Released reservation for %s LUN: %llu ->" 237f2d30680SHannes Reinecke " MAPPED LUN: %llu for %s\n", 238f2d30680SHannes Reinecke tpg->se_tpg_tfo->get_fabric_name(), 23929a05deeSNicholas Bellinger cmd->se_lun->unpacked_lun, cmd->orig_fe_lun, 240c66ac9dbSNicholas Bellinger sess->se_node_acl->initiatorname); 241c66ac9dbSNicholas Bellinger 242d29a5b6aSChristoph Hellwig out_unlock: 243d29a5b6aSChristoph Hellwig spin_unlock(&dev->dev_reservation_lock); 244d29a5b6aSChristoph Hellwig out: 2456bb35e00SChristoph Hellwig target_complete_cmd(cmd, GOOD); 246de103c93SChristoph Hellwig return 0; 247c66ac9dbSNicholas Bellinger } 248c66ac9dbSNicholas Bellinger 249de103c93SChristoph Hellwig sense_reason_t 250de103c93SChristoph Hellwig target_scsi2_reservation_reserve(struct se_cmd *cmd) 251c66ac9dbSNicholas Bellinger { 252c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 253c66ac9dbSNicholas Bellinger struct se_session *sess = cmd->se_sess; 254609234e3SWei Yongjun struct se_portal_group *tpg; 255de103c93SChristoph Hellwig sense_reason_t ret = 0; 256de103c93SChristoph Hellwig int rc; 257c66ac9dbSNicholas Bellinger 258a1d8b49aSAndy Grover if ((cmd->t_task_cdb[1] & 0x01) && 259a1d8b49aSAndy Grover (cmd->t_task_cdb[1] & 0x02)) { 260a3960cedSColin Ian King pr_err("LongIO and Obsolete Bits set, returning ILLEGAL_REQUEST\n"); 261de103c93SChristoph Hellwig return TCM_UNSUPPORTED_SCSI_OPCODE; 262c66ac9dbSNicholas Bellinger } 263c66ac9dbSNicholas Bellinger /* 264c66ac9dbSNicholas Bellinger * This is currently the case for target_core_mod passthrough struct se_cmd 265c66ac9dbSNicholas Bellinger * ops 266c66ac9dbSNicholas Bellinger */ 267609234e3SWei Yongjun if (!sess || !sess->se_tpg) 268d29a5b6aSChristoph Hellwig goto out; 269087a03b3SNicholas Bellinger rc = target_check_scsi2_reservation_conflict(cmd); 270087a03b3SNicholas Bellinger if (rc == 1) 271d29a5b6aSChristoph Hellwig goto out; 272c66ac9dbSNicholas Bellinger 273de103c93SChristoph Hellwig if (rc < 0) 274de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 275de103c93SChristoph Hellwig 276609234e3SWei Yongjun tpg = sess->se_tpg; 277c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 278c66ac9dbSNicholas Bellinger if (dev->dev_reserved_node_acl && 279c66ac9dbSNicholas Bellinger (dev->dev_reserved_node_acl != sess->se_node_acl)) { 2806708bb27SAndy Grover pr_err("SCSI-2 RESERVATION CONFLIFT for %s fabric\n", 281e3d6f909SAndy Grover tpg->se_tpg_tfo->get_fabric_name()); 282f2d30680SHannes Reinecke pr_err("Original reserver LUN: %llu %s\n", 283e3d6f909SAndy Grover cmd->se_lun->unpacked_lun, 284c66ac9dbSNicholas Bellinger dev->dev_reserved_node_acl->initiatorname); 285f2d30680SHannes Reinecke pr_err("Current attempt - LUN: %llu -> MAPPED LUN: %llu" 286e3d6f909SAndy Grover " from %s \n", cmd->se_lun->unpacked_lun, 28729a05deeSNicholas Bellinger cmd->orig_fe_lun, 288c66ac9dbSNicholas Bellinger sess->se_node_acl->initiatorname); 289de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 290d29a5b6aSChristoph Hellwig goto out_unlock; 291c66ac9dbSNicholas Bellinger } 292c66ac9dbSNicholas Bellinger 293c66ac9dbSNicholas Bellinger dev->dev_reserved_node_acl = sess->se_node_acl; 2940fd97ccfSChristoph Hellwig dev->dev_reservation_flags |= DRF_SPC2_RESERVATIONS; 295c66ac9dbSNicholas Bellinger if (sess->sess_bin_isid != 0) { 296c66ac9dbSNicholas Bellinger dev->dev_res_bin_isid = sess->sess_bin_isid; 2970fd97ccfSChristoph Hellwig dev->dev_reservation_flags |= DRF_SPC2_RESERVATIONS_WITH_ISID; 298c66ac9dbSNicholas Bellinger } 299f2d30680SHannes Reinecke pr_debug("SCSI-2 Reserved %s LUN: %llu -> MAPPED LUN: %llu" 300e3d6f909SAndy Grover " for %s\n", tpg->se_tpg_tfo->get_fabric_name(), 30129a05deeSNicholas Bellinger cmd->se_lun->unpacked_lun, cmd->orig_fe_lun, 302c66ac9dbSNicholas Bellinger sess->se_node_acl->initiatorname); 303c66ac9dbSNicholas Bellinger 304d29a5b6aSChristoph Hellwig out_unlock: 305d29a5b6aSChristoph Hellwig spin_unlock(&dev->dev_reservation_lock); 306d29a5b6aSChristoph Hellwig out: 3076bb35e00SChristoph Hellwig if (!ret) 3086bb35e00SChristoph Hellwig target_complete_cmd(cmd, GOOD); 309d29a5b6aSChristoph Hellwig return ret; 310c66ac9dbSNicholas Bellinger } 311c66ac9dbSNicholas Bellinger 312c66ac9dbSNicholas Bellinger 313c66ac9dbSNicholas Bellinger /* 314c66ac9dbSNicholas Bellinger * Begin SPC-3/SPC-4 Persistent Reservations emulation support 315c66ac9dbSNicholas Bellinger * 316c66ac9dbSNicholas Bellinger * This function is called by those initiator ports who are *NOT* 317c66ac9dbSNicholas Bellinger * the active PR reservation holder when a reservation is present. 318c66ac9dbSNicholas Bellinger */ 3199fcb57f3SChristoph Hellwig static int core_scsi3_pr_seq_non_holder(struct se_cmd *cmd, u32 pr_reg_type, 3209fcb57f3SChristoph Hellwig bool isid_mismatch) 321c66ac9dbSNicholas Bellinger { 322d977f437SChristoph Hellwig unsigned char *cdb = cmd->t_task_cdb; 323e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 32429a05deeSNicholas Bellinger struct se_node_acl *nacl = se_sess->se_node_acl; 3259fcb57f3SChristoph Hellwig int other_cdb = 0; 326c66ac9dbSNicholas Bellinger int registered_nexus = 0, ret = 1; /* Conflict by default */ 327c66ac9dbSNicholas Bellinger int all_reg = 0, reg_only = 0; /* ALL_REG, REG_ONLY */ 328c66ac9dbSNicholas Bellinger int we = 0; /* Write Exclusive */ 329c66ac9dbSNicholas Bellinger int legacy = 0; /* Act like a legacy device and return 330c66ac9dbSNicholas Bellinger * RESERVATION CONFLICT on some CDBs */ 331c66ac9dbSNicholas Bellinger 3329fcb57f3SChristoph Hellwig if (isid_mismatch) { 3339fcb57f3SChristoph Hellwig registered_nexus = 0; 3349fcb57f3SChristoph Hellwig } else { 3359fcb57f3SChristoph Hellwig struct se_dev_entry *se_deve; 336c66ac9dbSNicholas Bellinger 33729a05deeSNicholas Bellinger rcu_read_lock(); 33829a05deeSNicholas Bellinger se_deve = target_nacl_find_deve(nacl, cmd->orig_fe_lun); 33980bfdfa9SNicholas Bellinger if (se_deve) 3409fcb57f3SChristoph Hellwig registered_nexus = test_bit(DEF_PR_REG_ACTIVE, 3419fcb57f3SChristoph Hellwig &se_deve->deve_flags); 34280bfdfa9SNicholas Bellinger rcu_read_unlock(); 3439fcb57f3SChristoph Hellwig } 344c66ac9dbSNicholas Bellinger 345c66ac9dbSNicholas Bellinger switch (pr_reg_type) { 346c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE: 347c66ac9dbSNicholas Bellinger we = 1; 348c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS: 349c66ac9dbSNicholas Bellinger /* 350c66ac9dbSNicholas Bellinger * Some commands are only allowed for the persistent reservation 351c66ac9dbSNicholas Bellinger * holder. 352c66ac9dbSNicholas Bellinger */ 353c66ac9dbSNicholas Bellinger break; 354c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: 355c66ac9dbSNicholas Bellinger we = 1; 356d7e595ddSBart Van Assche /* fall through */ 357c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: 358c66ac9dbSNicholas Bellinger /* 359c66ac9dbSNicholas Bellinger * Some commands are only allowed for registered I_T Nexuses. 360c66ac9dbSNicholas Bellinger */ 361c66ac9dbSNicholas Bellinger reg_only = 1; 362c66ac9dbSNicholas Bellinger break; 363c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: 364c66ac9dbSNicholas Bellinger we = 1; 365d7e595ddSBart Van Assche /* fall through */ 366c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: 367c66ac9dbSNicholas Bellinger /* 368c66ac9dbSNicholas Bellinger * Each registered I_T Nexus is a reservation holder. 369c66ac9dbSNicholas Bellinger */ 370c66ac9dbSNicholas Bellinger all_reg = 1; 371c66ac9dbSNicholas Bellinger break; 372c66ac9dbSNicholas Bellinger default: 373e3d6f909SAndy Grover return -EINVAL; 374c66ac9dbSNicholas Bellinger } 375c66ac9dbSNicholas Bellinger /* 376c66ac9dbSNicholas Bellinger * Referenced from spc4r17 table 45 for *NON* PR holder access 377c66ac9dbSNicholas Bellinger */ 378c66ac9dbSNicholas Bellinger switch (cdb[0]) { 379c66ac9dbSNicholas Bellinger case SECURITY_PROTOCOL_IN: 380c66ac9dbSNicholas Bellinger if (registered_nexus) 381c66ac9dbSNicholas Bellinger return 0; 382c66ac9dbSNicholas Bellinger ret = (we) ? 0 : 1; 383c66ac9dbSNicholas Bellinger break; 384c66ac9dbSNicholas Bellinger case MODE_SENSE: 385c66ac9dbSNicholas Bellinger case MODE_SENSE_10: 386c66ac9dbSNicholas Bellinger case READ_ATTRIBUTE: 387c66ac9dbSNicholas Bellinger case READ_BUFFER: 388c66ac9dbSNicholas Bellinger case RECEIVE_DIAGNOSTIC: 389c66ac9dbSNicholas Bellinger if (legacy) { 390c66ac9dbSNicholas Bellinger ret = 1; 391c66ac9dbSNicholas Bellinger break; 392c66ac9dbSNicholas Bellinger } 393c66ac9dbSNicholas Bellinger if (registered_nexus) { 394c66ac9dbSNicholas Bellinger ret = 0; 395c66ac9dbSNicholas Bellinger break; 396c66ac9dbSNicholas Bellinger } 397c66ac9dbSNicholas Bellinger ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ 398c66ac9dbSNicholas Bellinger break; 399c66ac9dbSNicholas Bellinger case PERSISTENT_RESERVE_OUT: 400c66ac9dbSNicholas Bellinger /* 401c66ac9dbSNicholas Bellinger * This follows PERSISTENT_RESERVE_OUT service actions that 402c66ac9dbSNicholas Bellinger * are allowed in the presence of various reservations. 403c66ac9dbSNicholas Bellinger * See spc4r17, table 46 404c66ac9dbSNicholas Bellinger */ 405c66ac9dbSNicholas Bellinger switch (cdb[1] & 0x1f) { 406c66ac9dbSNicholas Bellinger case PRO_CLEAR: 407c66ac9dbSNicholas Bellinger case PRO_PREEMPT: 408c66ac9dbSNicholas Bellinger case PRO_PREEMPT_AND_ABORT: 409c66ac9dbSNicholas Bellinger ret = (registered_nexus) ? 0 : 1; 410c66ac9dbSNicholas Bellinger break; 411c66ac9dbSNicholas Bellinger case PRO_REGISTER: 412c66ac9dbSNicholas Bellinger case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: 413c66ac9dbSNicholas Bellinger ret = 0; 414c66ac9dbSNicholas Bellinger break; 415c66ac9dbSNicholas Bellinger case PRO_REGISTER_AND_MOVE: 416c66ac9dbSNicholas Bellinger case PRO_RESERVE: 417c66ac9dbSNicholas Bellinger ret = 1; 418c66ac9dbSNicholas Bellinger break; 419c66ac9dbSNicholas Bellinger case PRO_RELEASE: 420c66ac9dbSNicholas Bellinger ret = (registered_nexus) ? 0 : 1; 421c66ac9dbSNicholas Bellinger break; 422c66ac9dbSNicholas Bellinger default: 4236708bb27SAndy Grover pr_err("Unknown PERSISTENT_RESERVE_OUT service" 424c66ac9dbSNicholas Bellinger " action: 0x%02x\n", cdb[1] & 0x1f); 425e3d6f909SAndy Grover return -EINVAL; 426c66ac9dbSNicholas Bellinger } 427c66ac9dbSNicholas Bellinger break; 428c66ac9dbSNicholas Bellinger case RELEASE: 429c66ac9dbSNicholas Bellinger case RELEASE_10: 430eacac00cSChristoph Hellwig /* Handled by CRH=1 in target_scsi2_reservation_release() */ 431c66ac9dbSNicholas Bellinger ret = 0; 432c66ac9dbSNicholas Bellinger break; 433c66ac9dbSNicholas Bellinger case RESERVE: 434c66ac9dbSNicholas Bellinger case RESERVE_10: 435eacac00cSChristoph Hellwig /* Handled by CRH=1 in target_scsi2_reservation_reserve() */ 436c66ac9dbSNicholas Bellinger ret = 0; 437c66ac9dbSNicholas Bellinger break; 438c66ac9dbSNicholas Bellinger case TEST_UNIT_READY: 439c66ac9dbSNicholas Bellinger ret = (legacy) ? 1 : 0; /* Conflict for legacy */ 440c66ac9dbSNicholas Bellinger break; 441c66ac9dbSNicholas Bellinger case MAINTENANCE_IN: 442c66ac9dbSNicholas Bellinger switch (cdb[1] & 0x1f) { 443c66ac9dbSNicholas Bellinger case MI_MANAGEMENT_PROTOCOL_IN: 444c66ac9dbSNicholas Bellinger if (registered_nexus) { 445c66ac9dbSNicholas Bellinger ret = 0; 446c66ac9dbSNicholas Bellinger break; 447c66ac9dbSNicholas Bellinger } 448c66ac9dbSNicholas Bellinger ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ 449c66ac9dbSNicholas Bellinger break; 450c66ac9dbSNicholas Bellinger case MI_REPORT_SUPPORTED_OPERATION_CODES: 451c66ac9dbSNicholas Bellinger case MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS: 452c66ac9dbSNicholas Bellinger if (legacy) { 453c66ac9dbSNicholas Bellinger ret = 1; 454c66ac9dbSNicholas Bellinger break; 455c66ac9dbSNicholas Bellinger } 456c66ac9dbSNicholas Bellinger if (registered_nexus) { 457c66ac9dbSNicholas Bellinger ret = 0; 458c66ac9dbSNicholas Bellinger break; 459c66ac9dbSNicholas Bellinger } 460c66ac9dbSNicholas Bellinger ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ 461c66ac9dbSNicholas Bellinger break; 462c66ac9dbSNicholas Bellinger case MI_REPORT_ALIASES: 463c66ac9dbSNicholas Bellinger case MI_REPORT_IDENTIFYING_INFORMATION: 464c66ac9dbSNicholas Bellinger case MI_REPORT_PRIORITY: 465c66ac9dbSNicholas Bellinger case MI_REPORT_TARGET_PGS: 466c66ac9dbSNicholas Bellinger case MI_REPORT_TIMESTAMP: 467c66ac9dbSNicholas Bellinger ret = 0; /* Allowed */ 468c66ac9dbSNicholas Bellinger break; 469c66ac9dbSNicholas Bellinger default: 4706708bb27SAndy Grover pr_err("Unknown MI Service Action: 0x%02x\n", 471c66ac9dbSNicholas Bellinger (cdb[1] & 0x1f)); 472e3d6f909SAndy Grover return -EINVAL; 473c66ac9dbSNicholas Bellinger } 474c66ac9dbSNicholas Bellinger break; 475c66ac9dbSNicholas Bellinger case ACCESS_CONTROL_IN: 476c66ac9dbSNicholas Bellinger case ACCESS_CONTROL_OUT: 477c66ac9dbSNicholas Bellinger case INQUIRY: 478c66ac9dbSNicholas Bellinger case LOG_SENSE: 47985686f69SHannes Reinecke case SERVICE_ACTION_IN_12: 480c66ac9dbSNicholas Bellinger case REPORT_LUNS: 481c66ac9dbSNicholas Bellinger case REQUEST_SENSE: 4826816966aSMarco Sanvido case PERSISTENT_RESERVE_IN: 483c66ac9dbSNicholas Bellinger ret = 0; /*/ Allowed CDBs */ 484c66ac9dbSNicholas Bellinger break; 485c66ac9dbSNicholas Bellinger default: 486c66ac9dbSNicholas Bellinger other_cdb = 1; 487c66ac9dbSNicholas Bellinger break; 488c66ac9dbSNicholas Bellinger } 489c66ac9dbSNicholas Bellinger /* 49025985edcSLucas De Marchi * Case where the CDB is explicitly allowed in the above switch 491c66ac9dbSNicholas Bellinger * statement. 492c66ac9dbSNicholas Bellinger */ 4936708bb27SAndy Grover if (!ret && !other_cdb) { 494125d0119SHannes Reinecke pr_debug("Allowing explicit CDB: 0x%02x for %s" 495c66ac9dbSNicholas Bellinger " reservation holder\n", cdb[0], 496c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 4978b1e1244SAndy Grover 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 */ 504ee1b1b9cSAndy Grover 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 */ 5258b1e1244SAndy Grover 5266708bb27SAndy Grover if (!registered_nexus) { 527125d0119SHannes Reinecke pr_debug("Allowing implicit 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 } 5328b1e1244SAndy Grover 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 */ 5418b1e1244SAndy Grover 542125d0119SHannes Reinecke pr_debug("Allowing implicit CDB: 0x%02x for %s" 543c66ac9dbSNicholas Bellinger " reservation\n", cdb[0], 544c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 5458b1e1244SAndy Grover 546c66ac9dbSNicholas Bellinger return 0; 547c66ac9dbSNicholas Bellinger } 5481ecc7586SLee Duncan } else if (we && registered_nexus) { 5491ecc7586SLee Duncan /* 5501ecc7586SLee Duncan * Reads are allowed for Write Exclusive locks 5511ecc7586SLee Duncan * from all registrants. 5521ecc7586SLee Duncan */ 5531ecc7586SLee Duncan if (cmd->data_direction == DMA_FROM_DEVICE) { 5541ecc7586SLee Duncan pr_debug("Allowing READ CDB: 0x%02x for %s" 5551ecc7586SLee Duncan " reservation\n", cdb[0], 5561ecc7586SLee Duncan core_scsi3_pr_dump_type(pr_reg_type)); 5571ecc7586SLee Duncan 5581ecc7586SLee Duncan return 0; 5591ecc7586SLee Duncan } 560c66ac9dbSNicholas Bellinger } 5616708bb27SAndy Grover pr_debug("%s Conflict for %sregistered nexus %s CDB: 0x%2x" 562c66ac9dbSNicholas Bellinger " for %s reservation\n", transport_dump_cmd_direction(cmd), 563c66ac9dbSNicholas Bellinger (registered_nexus) ? "" : "un", 564c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, cdb[0], 565c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 566c66ac9dbSNicholas Bellinger 567c66ac9dbSNicholas Bellinger return 1; /* Conflict by default */ 568c66ac9dbSNicholas Bellinger } 569c66ac9dbSNicholas Bellinger 570de103c93SChristoph Hellwig static sense_reason_t 571de103c93SChristoph Hellwig target_scsi3_pr_reservation_check(struct se_cmd *cmd) 572d977f437SChristoph Hellwig { 573d977f437SChristoph Hellwig struct se_device *dev = cmd->se_dev; 574d977f437SChristoph Hellwig struct se_session *sess = cmd->se_sess; 575d977f437SChristoph Hellwig u32 pr_reg_type; 5769fcb57f3SChristoph Hellwig bool isid_mismatch = false; 577d977f437SChristoph Hellwig 578d977f437SChristoph Hellwig if (!dev->dev_pr_res_holder) 579d977f437SChristoph Hellwig return 0; 580d977f437SChristoph Hellwig 581d977f437SChristoph Hellwig pr_reg_type = dev->dev_pr_res_holder->pr_res_type; 582d977f437SChristoph Hellwig cmd->pr_res_key = dev->dev_pr_res_holder->pr_res_key; 583d977f437SChristoph Hellwig if (dev->dev_pr_res_holder->pr_reg_nacl != sess->se_node_acl) 584d977f437SChristoph Hellwig goto check_nonholder; 585d977f437SChristoph Hellwig 586d977f437SChristoph Hellwig if (dev->dev_pr_res_holder->isid_present_at_reg) { 587d977f437SChristoph Hellwig if (dev->dev_pr_res_holder->pr_reg_bin_isid != 588d977f437SChristoph Hellwig sess->sess_bin_isid) { 5899fcb57f3SChristoph Hellwig isid_mismatch = true; 590d977f437SChristoph Hellwig goto check_nonholder; 591d977f437SChristoph Hellwig } 592d977f437SChristoph Hellwig } 593d977f437SChristoph Hellwig 594d977f437SChristoph Hellwig return 0; 595d977f437SChristoph Hellwig 596d977f437SChristoph Hellwig check_nonholder: 5979fcb57f3SChristoph Hellwig if (core_scsi3_pr_seq_non_holder(cmd, pr_reg_type, isid_mismatch)) 598de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 599d977f437SChristoph Hellwig return 0; 600d977f437SChristoph Hellwig } 601d977f437SChristoph Hellwig 602c66ac9dbSNicholas Bellinger static u32 core_scsi3_pr_generation(struct se_device *dev) 603c66ac9dbSNicholas Bellinger { 604c66ac9dbSNicholas Bellinger u32 prg; 6050fd97ccfSChristoph Hellwig 606c66ac9dbSNicholas Bellinger /* 607c66ac9dbSNicholas Bellinger * PRGeneration field shall contain the value of a 32-bit wrapping 608c66ac9dbSNicholas Bellinger * counter mainted by the device server. 609c66ac9dbSNicholas Bellinger * 610c66ac9dbSNicholas Bellinger * Note that this is done regardless of Active Persist across 611c66ac9dbSNicholas Bellinger * Target PowerLoss (APTPL) 612c66ac9dbSNicholas Bellinger * 613c66ac9dbSNicholas Bellinger * See spc4r17 section 6.3.12 READ_KEYS service action 614c66ac9dbSNicholas Bellinger */ 615c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 6160fd97ccfSChristoph Hellwig prg = dev->t10_pr.pr_generation++; 617c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 618c66ac9dbSNicholas Bellinger 619c66ac9dbSNicholas Bellinger return prg; 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, 62579dc9c9eSNicholas Bellinger struct se_lun *lun, 6263ccd6e83SNicholas Bellinger struct se_dev_entry *dest_deve, 627f2d30680SHannes Reinecke u64 mapped_lun, 628c66ac9dbSNicholas Bellinger unsigned char *isid, 629c66ac9dbSNicholas Bellinger u64 sa_res_key, 630c66ac9dbSNicholas Bellinger int all_tg_pt, 631c66ac9dbSNicholas Bellinger int aptpl) 632c66ac9dbSNicholas Bellinger { 633c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 634c66ac9dbSNicholas Bellinger 635c66ac9dbSNicholas Bellinger pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_ATOMIC); 6366708bb27SAndy Grover if (!pr_reg) { 6376708bb27SAndy Grover pr_err("Unable to allocate struct t10_pr_registration\n"); 638c66ac9dbSNicholas Bellinger return NULL; 639c66ac9dbSNicholas Bellinger } 640c66ac9dbSNicholas Bellinger 641c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_list); 642c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list); 643c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list); 644c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list); 645c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list); 646c66ac9dbSNicholas Bellinger atomic_set(&pr_reg->pr_res_holders, 0); 647c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = nacl; 6483ccd6e83SNicholas Bellinger /* 6493ccd6e83SNicholas Bellinger * For destination registrations for ALL_TG_PT=1 and SPEC_I_PT=1, 6503ccd6e83SNicholas Bellinger * the se_dev_entry->pr_ref will have been already obtained by 6513ccd6e83SNicholas Bellinger * core_get_se_deve_from_rtpi() or __core_scsi3_alloc_registration(). 6523ccd6e83SNicholas Bellinger * 6533ccd6e83SNicholas Bellinger * Otherwise, locate se_dev_entry now and obtain a reference until 6543ccd6e83SNicholas Bellinger * registration completes in __core_scsi3_add_registration(). 6553ccd6e83SNicholas Bellinger */ 6563ccd6e83SNicholas Bellinger if (dest_deve) { 6573ccd6e83SNicholas Bellinger pr_reg->pr_reg_deve = dest_deve; 6583ccd6e83SNicholas Bellinger } else { 6593ccd6e83SNicholas Bellinger rcu_read_lock(); 6603ccd6e83SNicholas Bellinger pr_reg->pr_reg_deve = target_nacl_find_deve(nacl, mapped_lun); 6613ccd6e83SNicholas Bellinger if (!pr_reg->pr_reg_deve) { 6623ccd6e83SNicholas Bellinger rcu_read_unlock(); 6633ccd6e83SNicholas Bellinger pr_err("Unable to locate PR deve %s mapped_lun: %llu\n", 6643ccd6e83SNicholas Bellinger nacl->initiatorname, mapped_lun); 6653ccd6e83SNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 6663ccd6e83SNicholas Bellinger return NULL; 6673ccd6e83SNicholas Bellinger } 6683ccd6e83SNicholas Bellinger kref_get(&pr_reg->pr_reg_deve->pr_kref); 6693ccd6e83SNicholas Bellinger rcu_read_unlock(); 6703ccd6e83SNicholas Bellinger } 67179dc9c9eSNicholas Bellinger pr_reg->pr_res_mapped_lun = mapped_lun; 67279dc9c9eSNicholas Bellinger pr_reg->pr_aptpl_target_lun = lun->unpacked_lun; 673adf653f9SChristoph Hellwig pr_reg->tg_pt_sep_rtpi = lun->lun_rtpi; 674c66ac9dbSNicholas Bellinger pr_reg->pr_res_key = sa_res_key; 675c66ac9dbSNicholas Bellinger pr_reg->pr_reg_all_tg_pt = all_tg_pt; 676c66ac9dbSNicholas Bellinger pr_reg->pr_reg_aptpl = aptpl; 677c66ac9dbSNicholas Bellinger /* 678c66ac9dbSNicholas Bellinger * If an ISID value for this SCSI Initiator Port exists, 679c66ac9dbSNicholas Bellinger * save it to the registration now. 680c66ac9dbSNicholas Bellinger */ 681c66ac9dbSNicholas Bellinger if (isid != NULL) { 682c66ac9dbSNicholas Bellinger pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid); 683c66ac9dbSNicholas Bellinger snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid); 684c66ac9dbSNicholas Bellinger pr_reg->isid_present_at_reg = 1; 685c66ac9dbSNicholas Bellinger } 686c66ac9dbSNicholas Bellinger 687c66ac9dbSNicholas Bellinger return pr_reg; 688c66ac9dbSNicholas Bellinger } 689c66ac9dbSNicholas Bellinger 690c66ac9dbSNicholas Bellinger static int core_scsi3_lunacl_depend_item(struct se_dev_entry *); 691c66ac9dbSNicholas Bellinger static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *); 692c66ac9dbSNicholas Bellinger 693c66ac9dbSNicholas Bellinger /* 694c66ac9dbSNicholas Bellinger * Function used for handling PR registrations for ALL_TG_PT=1 and ALL_TG_PT=0 695c66ac9dbSNicholas Bellinger * modes. 696c66ac9dbSNicholas Bellinger */ 697c66ac9dbSNicholas Bellinger static struct t10_pr_registration *__core_scsi3_alloc_registration( 698c66ac9dbSNicholas Bellinger struct se_device *dev, 699c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 70079dc9c9eSNicholas Bellinger struct se_lun *lun, 701c66ac9dbSNicholas Bellinger struct se_dev_entry *deve, 702f2d30680SHannes Reinecke u64 mapped_lun, 703c66ac9dbSNicholas Bellinger unsigned char *isid, 704c66ac9dbSNicholas Bellinger u64 sa_res_key, 705c66ac9dbSNicholas Bellinger int all_tg_pt, 706c66ac9dbSNicholas Bellinger int aptpl) 707c66ac9dbSNicholas Bellinger { 708c66ac9dbSNicholas Bellinger struct se_dev_entry *deve_tmp; 709c66ac9dbSNicholas Bellinger struct se_node_acl *nacl_tmp; 71079dc9c9eSNicholas Bellinger struct se_lun_acl *lacl_tmp; 711adf653f9SChristoph Hellwig struct se_lun *lun_tmp, *next, *dest_lun; 7129ac8928eSChristoph Hellwig const struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; 713c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_atp, *pr_reg_tmp, *pr_reg_tmp_safe; 714c66ac9dbSNicholas Bellinger int ret; 715c66ac9dbSNicholas Bellinger /* 716c66ac9dbSNicholas Bellinger * Create a registration for the I_T Nexus upon which the 717c66ac9dbSNicholas Bellinger * PROUT REGISTER was received. 718c66ac9dbSNicholas Bellinger */ 71979dc9c9eSNicholas Bellinger pr_reg = __core_scsi3_do_alloc_registration(dev, nacl, lun, deve, mapped_lun, 72079dc9c9eSNicholas Bellinger isid, sa_res_key, all_tg_pt, 72179dc9c9eSNicholas Bellinger aptpl); 7226708bb27SAndy Grover if (!pr_reg) 723c66ac9dbSNicholas Bellinger return NULL; 724c66ac9dbSNicholas Bellinger /* 725c66ac9dbSNicholas Bellinger * Return pointer to pr_reg for ALL_TG_PT=0 726c66ac9dbSNicholas Bellinger */ 7276708bb27SAndy Grover if (!all_tg_pt) 728c66ac9dbSNicholas Bellinger return pr_reg; 729c66ac9dbSNicholas Bellinger /* 730c66ac9dbSNicholas Bellinger * Create list of matching SCSI Initiator Port registrations 731c66ac9dbSNicholas Bellinger * for ALL_TG_PT=1 732c66ac9dbSNicholas Bellinger */ 733c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 734adf653f9SChristoph Hellwig list_for_each_entry_safe(lun_tmp, next, &dev->dev_sep_list, lun_dev_link) { 7359e37d042SNicholas Bellinger if (!percpu_ref_tryget_live(&lun_tmp->lun_ref)) 7369e37d042SNicholas Bellinger continue; 737c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 738c66ac9dbSNicholas Bellinger 7391adff1b3SNicholas Bellinger spin_lock(&lun_tmp->lun_deve_lock); 740adf653f9SChristoph Hellwig list_for_each_entry(deve_tmp, &lun_tmp->lun_deve_list, lun_link) { 741c66ac9dbSNicholas Bellinger /* 742c66ac9dbSNicholas Bellinger * This pointer will be NULL for demo mode MappedLUNs 743125d0119SHannes Reinecke * that have not been make explicit via a ConfigFS 744c66ac9dbSNicholas Bellinger * MappedLUN group for the SCSI Initiator Node ACL. 745c66ac9dbSNicholas Bellinger */ 7466708bb27SAndy Grover if (!deve_tmp->se_lun_acl) 747c66ac9dbSNicholas Bellinger continue; 748c66ac9dbSNicholas Bellinger 74979dc9c9eSNicholas Bellinger lacl_tmp = rcu_dereference_check(deve_tmp->se_lun_acl, 750adf653f9SChristoph Hellwig lockdep_is_held(&lun_tmp->lun_deve_lock)); 75179dc9c9eSNicholas Bellinger nacl_tmp = lacl_tmp->se_lun_nacl; 752c66ac9dbSNicholas Bellinger /* 753c66ac9dbSNicholas Bellinger * Skip the matching struct se_node_acl that is allocated 754c66ac9dbSNicholas Bellinger * above.. 755c66ac9dbSNicholas Bellinger */ 756c66ac9dbSNicholas Bellinger if (nacl == nacl_tmp) 757c66ac9dbSNicholas Bellinger continue; 758c66ac9dbSNicholas Bellinger /* 759c66ac9dbSNicholas Bellinger * Only perform PR registrations for target ports on 760c66ac9dbSNicholas Bellinger * the same fabric module as the REGISTER w/ ALL_TG_PT=1 761c66ac9dbSNicholas Bellinger * arrived. 762c66ac9dbSNicholas Bellinger */ 763c66ac9dbSNicholas Bellinger if (tfo != nacl_tmp->se_tpg->se_tpg_tfo) 764c66ac9dbSNicholas Bellinger continue; 765c66ac9dbSNicholas Bellinger /* 766c66ac9dbSNicholas Bellinger * Look for a matching Initiator Node ACL in ASCII format 767c66ac9dbSNicholas Bellinger */ 768c66ac9dbSNicholas Bellinger if (strcmp(nacl->initiatorname, nacl_tmp->initiatorname)) 769c66ac9dbSNicholas Bellinger continue; 770c66ac9dbSNicholas Bellinger 77129a05deeSNicholas Bellinger kref_get(&deve_tmp->pr_kref); 7721adff1b3SNicholas Bellinger spin_unlock(&lun_tmp->lun_deve_lock); 773c66ac9dbSNicholas Bellinger /* 774c66ac9dbSNicholas Bellinger * Grab a configfs group dependency that is released 775c66ac9dbSNicholas Bellinger * for the exception path at label out: below, or upon 776c66ac9dbSNicholas Bellinger * completion of adding ALL_TG_PT=1 registrations in 777c66ac9dbSNicholas Bellinger * __core_scsi3_add_registration() 778c66ac9dbSNicholas Bellinger */ 779c66ac9dbSNicholas Bellinger ret = core_scsi3_lunacl_depend_item(deve_tmp); 780c66ac9dbSNicholas Bellinger if (ret < 0) { 7816708bb27SAndy Grover pr_err("core_scsi3_lunacl_depend" 782c66ac9dbSNicholas Bellinger "_item() failed\n"); 7839e37d042SNicholas Bellinger percpu_ref_put(&lun_tmp->lun_ref); 78429a05deeSNicholas Bellinger kref_put(&deve_tmp->pr_kref, target_pr_kref_release); 785c66ac9dbSNicholas Bellinger goto out; 786c66ac9dbSNicholas Bellinger } 787c66ac9dbSNicholas Bellinger /* 788c66ac9dbSNicholas Bellinger * Located a matching SCSI Initiator Port on a different 789c66ac9dbSNicholas Bellinger * port, allocate the pr_reg_atp and attach it to the 790c66ac9dbSNicholas Bellinger * pr_reg->pr_reg_atp_list that will be processed once 791c66ac9dbSNicholas Bellinger * the original *pr_reg is processed in 792c66ac9dbSNicholas Bellinger * __core_scsi3_add_registration() 793c66ac9dbSNicholas Bellinger */ 794adf653f9SChristoph Hellwig dest_lun = rcu_dereference_check(deve_tmp->se_lun, 7952c935bc5SPeter Zijlstra kref_read(&deve_tmp->pr_kref) != 0); 79679dc9c9eSNicholas Bellinger 797c66ac9dbSNicholas Bellinger pr_reg_atp = __core_scsi3_do_alloc_registration(dev, 798adf653f9SChristoph Hellwig nacl_tmp, dest_lun, deve_tmp, 79979dc9c9eSNicholas Bellinger deve_tmp->mapped_lun, NULL, 800c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl); 8016708bb27SAndy Grover if (!pr_reg_atp) { 8029e37d042SNicholas Bellinger percpu_ref_put(&lun_tmp->lun_ref); 803c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(deve_tmp); 804c66ac9dbSNicholas Bellinger goto out; 805c66ac9dbSNicholas Bellinger } 806c66ac9dbSNicholas Bellinger 807c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg_atp->pr_reg_atp_mem_list, 808c66ac9dbSNicholas Bellinger &pr_reg->pr_reg_atp_list); 8091adff1b3SNicholas Bellinger spin_lock(&lun_tmp->lun_deve_lock); 810c66ac9dbSNicholas Bellinger } 8111adff1b3SNicholas Bellinger spin_unlock(&lun_tmp->lun_deve_lock); 812c66ac9dbSNicholas Bellinger 813c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 8149e37d042SNicholas Bellinger percpu_ref_put(&lun_tmp->lun_ref); 815c66ac9dbSNicholas Bellinger } 816c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 817c66ac9dbSNicholas Bellinger 818c66ac9dbSNicholas Bellinger return pr_reg; 819c66ac9dbSNicholas Bellinger out: 820c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, 821c66ac9dbSNicholas Bellinger &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) { 822c66ac9dbSNicholas Bellinger list_del(&pr_reg_tmp->pr_reg_atp_mem_list); 823c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); 824c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp); 825c66ac9dbSNicholas Bellinger } 826c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 827c66ac9dbSNicholas Bellinger return NULL; 828c66ac9dbSNicholas Bellinger } 829c66ac9dbSNicholas Bellinger 830c66ac9dbSNicholas Bellinger int core_scsi3_alloc_aptpl_registration( 831e3d6f909SAndy Grover struct t10_reservation *pr_tmpl, 832c66ac9dbSNicholas Bellinger u64 sa_res_key, 833c66ac9dbSNicholas Bellinger unsigned char *i_port, 834c66ac9dbSNicholas Bellinger unsigned char *isid, 835f2d30680SHannes Reinecke u64 mapped_lun, 836c66ac9dbSNicholas Bellinger unsigned char *t_port, 837c66ac9dbSNicholas Bellinger u16 tpgt, 838f2d30680SHannes Reinecke u64 target_lun, 839c66ac9dbSNicholas Bellinger int res_holder, 840c66ac9dbSNicholas Bellinger int all_tg_pt, 841c66ac9dbSNicholas Bellinger u8 type) 842c66ac9dbSNicholas Bellinger { 843c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 844c66ac9dbSNicholas Bellinger 8456708bb27SAndy Grover if (!i_port || !t_port || !sa_res_key) { 8466708bb27SAndy Grover pr_err("Illegal parameters for APTPL registration\n"); 847e3d6f909SAndy Grover return -EINVAL; 848c66ac9dbSNicholas Bellinger } 849c66ac9dbSNicholas Bellinger 850c66ac9dbSNicholas Bellinger pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_KERNEL); 8516708bb27SAndy Grover if (!pr_reg) { 8526708bb27SAndy Grover pr_err("Unable to allocate struct t10_pr_registration\n"); 853e3d6f909SAndy Grover return -ENOMEM; 854c66ac9dbSNicholas Bellinger } 855c66ac9dbSNicholas Bellinger 856c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_list); 857c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list); 858c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list); 859c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list); 860c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list); 861c66ac9dbSNicholas Bellinger atomic_set(&pr_reg->pr_res_holders, 0); 862c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = NULL; 863c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve = NULL; 864c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun = mapped_lun; 865c66ac9dbSNicholas Bellinger pr_reg->pr_aptpl_target_lun = target_lun; 866c66ac9dbSNicholas Bellinger pr_reg->pr_res_key = sa_res_key; 867c66ac9dbSNicholas Bellinger pr_reg->pr_reg_all_tg_pt = all_tg_pt; 868c66ac9dbSNicholas Bellinger pr_reg->pr_reg_aptpl = 1; 869c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope = 0; /* Always LUN_SCOPE */ 870c66ac9dbSNicholas Bellinger pr_reg->pr_res_type = type; 871c66ac9dbSNicholas Bellinger /* 872c66ac9dbSNicholas Bellinger * If an ISID value had been saved in APTPL metadata for this 873c66ac9dbSNicholas Bellinger * SCSI Initiator Port, restore it now. 874c66ac9dbSNicholas Bellinger */ 875c66ac9dbSNicholas Bellinger if (isid != NULL) { 876c66ac9dbSNicholas Bellinger pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid); 877c66ac9dbSNicholas Bellinger snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid); 878c66ac9dbSNicholas Bellinger pr_reg->isid_present_at_reg = 1; 879c66ac9dbSNicholas Bellinger } 880c66ac9dbSNicholas Bellinger /* 881c66ac9dbSNicholas Bellinger * Copy the i_port and t_port information from caller. 882c66ac9dbSNicholas Bellinger */ 883c66ac9dbSNicholas Bellinger snprintf(pr_reg->pr_iport, PR_APTPL_MAX_IPORT_LEN, "%s", i_port); 884c66ac9dbSNicholas Bellinger snprintf(pr_reg->pr_tport, PR_APTPL_MAX_TPORT_LEN, "%s", t_port); 885c66ac9dbSNicholas Bellinger pr_reg->pr_reg_tpgt = tpgt; 886c66ac9dbSNicholas Bellinger /* 887c66ac9dbSNicholas Bellinger * Set pr_res_holder from caller, the pr_reg who is the reservation 888c66ac9dbSNicholas Bellinger * holder will get it's pointer set in core_scsi3_aptpl_reserve() once 889c66ac9dbSNicholas Bellinger * the Initiator Node LUN ACL from the fabric module is created for 890c66ac9dbSNicholas Bellinger * this registration. 891c66ac9dbSNicholas Bellinger */ 892c66ac9dbSNicholas Bellinger pr_reg->pr_res_holder = res_holder; 893c66ac9dbSNicholas Bellinger 894c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg->pr_reg_aptpl_list, &pr_tmpl->aptpl_reg_list); 8956708bb27SAndy Grover pr_debug("SPC-3 PR APTPL Successfully added registration%s from" 896c66ac9dbSNicholas Bellinger " metadata\n", (res_holder) ? "+reservation" : ""); 897c66ac9dbSNicholas Bellinger return 0; 898c66ac9dbSNicholas Bellinger } 899c66ac9dbSNicholas Bellinger 900c66ac9dbSNicholas Bellinger static void core_scsi3_aptpl_reserve( 901c66ac9dbSNicholas Bellinger struct se_device *dev, 902c66ac9dbSNicholas Bellinger struct se_portal_group *tpg, 903c66ac9dbSNicholas Bellinger struct se_node_acl *node_acl, 904c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg) 905c66ac9dbSNicholas Bellinger { 906c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 907c66ac9dbSNicholas Bellinger 908c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 909d2843c17SAndy Grover core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 910c66ac9dbSNicholas Bellinger 911c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 912c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = pr_reg; 913c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 914c66ac9dbSNicholas Bellinger 9156708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: APTPL RESERVE created" 916c66ac9dbSNicholas Bellinger " new reservation holder TYPE: %s ALL_TG_PT: %d\n", 917e3d6f909SAndy Grover tpg->se_tpg_tfo->get_fabric_name(), 918c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg->pr_res_type), 919c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); 9206708bb27SAndy Grover pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n", 921e3d6f909SAndy Grover tpg->se_tpg_tfo->get_fabric_name(), node_acl->initiatorname, 922d2843c17SAndy Grover i_buf); 923c66ac9dbSNicholas Bellinger } 924c66ac9dbSNicholas Bellinger 925c66ac9dbSNicholas Bellinger static void __core_scsi3_add_registration(struct se_device *, struct se_node_acl *, 92633ce6a87SAndy Grover struct t10_pr_registration *, enum register_type, int); 927c66ac9dbSNicholas Bellinger 928c66ac9dbSNicholas Bellinger static int __core_scsi3_check_aptpl_registration( 929c66ac9dbSNicholas Bellinger struct se_device *dev, 930c66ac9dbSNicholas Bellinger struct se_portal_group *tpg, 931c66ac9dbSNicholas Bellinger struct se_lun *lun, 932f2d30680SHannes Reinecke u64 target_lun, 933c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 934f2d30680SHannes Reinecke u64 mapped_lun) 935c66ac9dbSNicholas Bellinger { 936c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp; 9370fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 938c66ac9dbSNicholas Bellinger unsigned char i_port[PR_APTPL_MAX_IPORT_LEN]; 939c66ac9dbSNicholas Bellinger unsigned char t_port[PR_APTPL_MAX_TPORT_LEN]; 940c66ac9dbSNicholas Bellinger u16 tpgt; 941c66ac9dbSNicholas Bellinger 942c66ac9dbSNicholas Bellinger memset(i_port, 0, PR_APTPL_MAX_IPORT_LEN); 943c66ac9dbSNicholas Bellinger memset(t_port, 0, PR_APTPL_MAX_TPORT_LEN); 944c66ac9dbSNicholas Bellinger /* 945c66ac9dbSNicholas Bellinger * Copy Initiator Port information from struct se_node_acl 946c66ac9dbSNicholas Bellinger */ 947c66ac9dbSNicholas Bellinger snprintf(i_port, PR_APTPL_MAX_IPORT_LEN, "%s", nacl->initiatorname); 948c66ac9dbSNicholas Bellinger snprintf(t_port, PR_APTPL_MAX_TPORT_LEN, "%s", 949e3d6f909SAndy Grover tpg->se_tpg_tfo->tpg_get_wwn(tpg)); 950e3d6f909SAndy Grover tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); 951c66ac9dbSNicholas Bellinger /* 952c66ac9dbSNicholas Bellinger * Look for the matching registrations+reservation from those 953c66ac9dbSNicholas Bellinger * created from APTPL metadata. Note that multiple registrations 954c66ac9dbSNicholas Bellinger * may exist for fabrics that use ISIDs in their SCSI Initiator Port 955c66ac9dbSNicholas Bellinger * TransportIDs. 956c66ac9dbSNicholas Bellinger */ 957c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->aptpl_reg_lock); 958c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, 959c66ac9dbSNicholas Bellinger pr_reg_aptpl_list) { 96092404e60SNicholas Bellinger 9616708bb27SAndy Grover if (!strcmp(pr_reg->pr_iport, i_port) && 96229a05deeSNicholas Bellinger (pr_reg->pr_res_mapped_lun == mapped_lun) && 963c66ac9dbSNicholas Bellinger !(strcmp(pr_reg->pr_tport, t_port)) && 964c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_tpgt == tpgt) && 965c66ac9dbSNicholas Bellinger (pr_reg->pr_aptpl_target_lun == target_lun)) { 9663ccd6e83SNicholas Bellinger /* 9673ccd6e83SNicholas Bellinger * Obtain the ->pr_reg_deve pointer + reference, that 9683ccd6e83SNicholas Bellinger * is released by __core_scsi3_add_registration() below. 9693ccd6e83SNicholas Bellinger */ 9703ccd6e83SNicholas Bellinger rcu_read_lock(); 9713ccd6e83SNicholas Bellinger pr_reg->pr_reg_deve = target_nacl_find_deve(nacl, mapped_lun); 9723ccd6e83SNicholas Bellinger if (!pr_reg->pr_reg_deve) { 9733ccd6e83SNicholas Bellinger pr_err("Unable to locate PR APTPL %s mapped_lun:" 9743ccd6e83SNicholas Bellinger " %llu\n", nacl->initiatorname, mapped_lun); 9753ccd6e83SNicholas Bellinger rcu_read_unlock(); 9763ccd6e83SNicholas Bellinger continue; 9773ccd6e83SNicholas Bellinger } 9783ccd6e83SNicholas Bellinger kref_get(&pr_reg->pr_reg_deve->pr_kref); 9793ccd6e83SNicholas Bellinger rcu_read_unlock(); 980c66ac9dbSNicholas Bellinger 981c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = nacl; 982adf653f9SChristoph Hellwig pr_reg->tg_pt_sep_rtpi = lun->lun_rtpi; 983c66ac9dbSNicholas Bellinger list_del(&pr_reg->pr_reg_aptpl_list); 984c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->aptpl_reg_lock); 985c66ac9dbSNicholas Bellinger /* 986c66ac9dbSNicholas Bellinger * At this point all of the pointers in *pr_reg will 987c66ac9dbSNicholas Bellinger * be setup, so go ahead and add the registration. 988c66ac9dbSNicholas Bellinger */ 989c66ac9dbSNicholas Bellinger __core_scsi3_add_registration(dev, nacl, pr_reg, 0, 0); 990c66ac9dbSNicholas Bellinger /* 991c66ac9dbSNicholas Bellinger * If this registration is the reservation holder, 992c66ac9dbSNicholas Bellinger * make that happen now.. 993c66ac9dbSNicholas Bellinger */ 994c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_holder) 995c66ac9dbSNicholas Bellinger core_scsi3_aptpl_reserve(dev, tpg, 996c66ac9dbSNicholas Bellinger nacl, pr_reg); 997c66ac9dbSNicholas Bellinger /* 998c66ac9dbSNicholas Bellinger * Reenable pr_aptpl_active to accept new metadata 999c66ac9dbSNicholas Bellinger * updates once the SCSI device is active again.. 1000c66ac9dbSNicholas Bellinger */ 1001c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->aptpl_reg_lock); 1002c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_active = 1; 1003c66ac9dbSNicholas Bellinger } 1004c66ac9dbSNicholas Bellinger } 1005c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->aptpl_reg_lock); 1006c66ac9dbSNicholas Bellinger 1007c66ac9dbSNicholas Bellinger return 0; 1008c66ac9dbSNicholas Bellinger } 1009c66ac9dbSNicholas Bellinger 1010c66ac9dbSNicholas Bellinger int core_scsi3_check_aptpl_registration( 1011c66ac9dbSNicholas Bellinger struct se_device *dev, 1012c66ac9dbSNicholas Bellinger struct se_portal_group *tpg, 1013c66ac9dbSNicholas Bellinger struct se_lun *lun, 1014e2480563SNicholas Bellinger struct se_node_acl *nacl, 1015f2d30680SHannes Reinecke u64 mapped_lun) 1016c66ac9dbSNicholas Bellinger { 1017d977f437SChristoph Hellwig if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1018c66ac9dbSNicholas Bellinger return 0; 1019c66ac9dbSNicholas Bellinger 1020c66ac9dbSNicholas Bellinger return __core_scsi3_check_aptpl_registration(dev, tpg, lun, 102129a05deeSNicholas Bellinger lun->unpacked_lun, nacl, 102229a05deeSNicholas Bellinger mapped_lun); 1023c66ac9dbSNicholas Bellinger } 1024c66ac9dbSNicholas Bellinger 1025c66ac9dbSNicholas Bellinger static void __core_scsi3_dump_registration( 10269ac8928eSChristoph Hellwig const struct target_core_fabric_ops *tfo, 1027c66ac9dbSNicholas Bellinger struct se_device *dev, 1028c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 1029c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 103033ce6a87SAndy Grover enum register_type register_type) 1031c66ac9dbSNicholas Bellinger { 1032c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg = nacl->se_tpg; 1033c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 1034c66ac9dbSNicholas Bellinger 1035c66ac9dbSNicholas Bellinger memset(&i_buf[0], 0, PR_REG_ISID_ID_LEN); 1036d2843c17SAndy Grover core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1037c66ac9dbSNicholas Bellinger 10386708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: REGISTER%s Initiator" 103933ce6a87SAndy Grover " Node: %s%s\n", tfo->get_fabric_name(), (register_type == REGISTER_AND_MOVE) ? 104033ce6a87SAndy Grover "_AND_MOVE" : (register_type == REGISTER_AND_IGNORE_EXISTING_KEY) ? 1041c66ac9dbSNicholas Bellinger "_AND_IGNORE_EXISTING_KEY" : "", nacl->initiatorname, 1042d2843c17SAndy Grover i_buf); 10436708bb27SAndy Grover pr_debug("SPC-3 PR [%s] registration on Target Port: %s,0x%04x\n", 1044c66ac9dbSNicholas Bellinger tfo->get_fabric_name(), tfo->tpg_get_wwn(se_tpg), 1045c66ac9dbSNicholas Bellinger tfo->tpg_get_tag(se_tpg)); 10466708bb27SAndy Grover pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target" 1047c66ac9dbSNicholas Bellinger " Port(s)\n", tfo->get_fabric_name(), 1048c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE", 1049e3d6f909SAndy Grover dev->transport->name); 10506708bb27SAndy Grover pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:" 1051c66ac9dbSNicholas Bellinger " 0x%08x APTPL: %d\n", tfo->get_fabric_name(), 1052c66ac9dbSNicholas Bellinger pr_reg->pr_res_key, pr_reg->pr_res_generation, 1053c66ac9dbSNicholas Bellinger pr_reg->pr_reg_aptpl); 1054c66ac9dbSNicholas Bellinger } 1055c66ac9dbSNicholas Bellinger 1056c66ac9dbSNicholas Bellinger static void __core_scsi3_add_registration( 1057c66ac9dbSNicholas Bellinger struct se_device *dev, 1058c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 1059c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 106033ce6a87SAndy Grover enum register_type register_type, 1061c66ac9dbSNicholas Bellinger int register_move) 1062c66ac9dbSNicholas Bellinger { 10639ac8928eSChristoph Hellwig const struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; 1064c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe; 10650fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 106680bfdfa9SNicholas Bellinger struct se_dev_entry *deve; 1067c66ac9dbSNicholas Bellinger 1068c66ac9dbSNicholas Bellinger /* 1069c66ac9dbSNicholas Bellinger * Increment PRgeneration counter for struct se_device upon a successful 1070c66ac9dbSNicholas Bellinger * REGISTER, see spc4r17 section 6.3.2 READ_KEYS service action 1071c66ac9dbSNicholas Bellinger * 1072c66ac9dbSNicholas Bellinger * Also, when register_move = 1 for PROUT REGISTER_AND_MOVE service 1073c66ac9dbSNicholas Bellinger * action, the struct se_device->dev_reservation_lock will already be held, 1074c66ac9dbSNicholas Bellinger * so we do not call core_scsi3_pr_generation() which grabs the lock 1075c66ac9dbSNicholas Bellinger * for the REGISTER. 1076c66ac9dbSNicholas Bellinger */ 1077c66ac9dbSNicholas Bellinger pr_reg->pr_res_generation = (register_move) ? 10780fd97ccfSChristoph Hellwig dev->t10_pr.pr_generation++ : 1079c66ac9dbSNicholas Bellinger core_scsi3_pr_generation(dev); 1080c66ac9dbSNicholas Bellinger 1081c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1082c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg->pr_reg_list, &pr_tmpl->registration_list); 1083c66ac9dbSNicholas Bellinger 1084c66ac9dbSNicholas Bellinger __core_scsi3_dump_registration(tfo, dev, nacl, pr_reg, register_type); 1085c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1086c66ac9dbSNicholas Bellinger /* 1087c66ac9dbSNicholas Bellinger * Skip extra processing for ALL_TG_PT=0 or REGISTER_AND_MOVE. 1088c66ac9dbSNicholas Bellinger */ 10896708bb27SAndy Grover if (!pr_reg->pr_reg_all_tg_pt || register_move) 10903ccd6e83SNicholas Bellinger goto out; 1091c66ac9dbSNicholas Bellinger /* 1092c66ac9dbSNicholas Bellinger * Walk pr_reg->pr_reg_atp_list and add registrations for ALL_TG_PT=1 1093c66ac9dbSNicholas Bellinger * allocated in __core_scsi3_alloc_registration() 1094c66ac9dbSNicholas Bellinger */ 1095c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, 1096c66ac9dbSNicholas Bellinger &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) { 109780bfdfa9SNicholas Bellinger struct se_node_acl *nacl_tmp = pr_reg_tmp->pr_reg_nacl; 109880bfdfa9SNicholas Bellinger 1099c66ac9dbSNicholas Bellinger list_del(&pr_reg_tmp->pr_reg_atp_mem_list); 1100c66ac9dbSNicholas Bellinger 1101c66ac9dbSNicholas Bellinger pr_reg_tmp->pr_res_generation = core_scsi3_pr_generation(dev); 1102c66ac9dbSNicholas Bellinger 1103c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1104c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg_tmp->pr_reg_list, 1105c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list); 1106c66ac9dbSNicholas Bellinger 110780bfdfa9SNicholas Bellinger __core_scsi3_dump_registration(tfo, dev, nacl_tmp, pr_reg_tmp, 1108c66ac9dbSNicholas Bellinger register_type); 1109c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 11103ccd6e83SNicholas Bellinger /* 11113ccd6e83SNicholas Bellinger * Drop configfs group dependency reference and deve->pr_kref 11123ccd6e83SNicholas Bellinger * obtained from __core_scsi3_alloc_registration() code. 11133ccd6e83SNicholas Bellinger */ 111480bfdfa9SNicholas Bellinger rcu_read_lock(); 111580bfdfa9SNicholas Bellinger deve = pr_reg_tmp->pr_reg_deve; 11163ccd6e83SNicholas Bellinger if (deve) { 111780bfdfa9SNicholas Bellinger set_bit(DEF_PR_REG_ACTIVE, &deve->deve_flags); 11183ccd6e83SNicholas Bellinger core_scsi3_lunacl_undepend_item(deve); 11193ccd6e83SNicholas Bellinger pr_reg_tmp->pr_reg_deve = NULL; 1120c66ac9dbSNicholas Bellinger } 11213ccd6e83SNicholas Bellinger rcu_read_unlock(); 11223ccd6e83SNicholas Bellinger } 11233ccd6e83SNicholas Bellinger out: 11243ccd6e83SNicholas Bellinger /* 11253ccd6e83SNicholas Bellinger * Drop deve->pr_kref obtained in __core_scsi3_do_alloc_registration() 11263ccd6e83SNicholas Bellinger */ 11273ccd6e83SNicholas Bellinger rcu_read_lock(); 11283ccd6e83SNicholas Bellinger deve = pr_reg->pr_reg_deve; 11293ccd6e83SNicholas Bellinger if (deve) { 11303ccd6e83SNicholas Bellinger set_bit(DEF_PR_REG_ACTIVE, &deve->deve_flags); 11313ccd6e83SNicholas Bellinger kref_put(&deve->pr_kref, target_pr_kref_release); 11323ccd6e83SNicholas Bellinger pr_reg->pr_reg_deve = NULL; 11333ccd6e83SNicholas Bellinger } 11343ccd6e83SNicholas Bellinger rcu_read_unlock(); 1135c66ac9dbSNicholas Bellinger } 1136c66ac9dbSNicholas Bellinger 1137c66ac9dbSNicholas Bellinger static int core_scsi3_alloc_registration( 1138c66ac9dbSNicholas Bellinger struct se_device *dev, 1139c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 114079dc9c9eSNicholas Bellinger struct se_lun *lun, 1141c66ac9dbSNicholas Bellinger struct se_dev_entry *deve, 1142f2d30680SHannes Reinecke u64 mapped_lun, 1143c66ac9dbSNicholas Bellinger unsigned char *isid, 1144c66ac9dbSNicholas Bellinger u64 sa_res_key, 1145c66ac9dbSNicholas Bellinger int all_tg_pt, 1146c66ac9dbSNicholas Bellinger int aptpl, 114733ce6a87SAndy Grover enum register_type register_type, 1148c66ac9dbSNicholas Bellinger int register_move) 1149c66ac9dbSNicholas Bellinger { 1150c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 1151c66ac9dbSNicholas Bellinger 115279dc9c9eSNicholas Bellinger pr_reg = __core_scsi3_alloc_registration(dev, nacl, lun, deve, mapped_lun, 115379dc9c9eSNicholas Bellinger isid, sa_res_key, all_tg_pt, 115479dc9c9eSNicholas Bellinger aptpl); 11556708bb27SAndy Grover if (!pr_reg) 1156e3d6f909SAndy Grover return -EPERM; 1157c66ac9dbSNicholas Bellinger 1158c66ac9dbSNicholas Bellinger __core_scsi3_add_registration(dev, nacl, pr_reg, 1159c66ac9dbSNicholas Bellinger register_type, register_move); 1160c66ac9dbSNicholas Bellinger return 0; 1161c66ac9dbSNicholas Bellinger } 1162c66ac9dbSNicholas Bellinger 1163c66ac9dbSNicholas Bellinger static struct t10_pr_registration *__core_scsi3_locate_pr_reg( 1164c66ac9dbSNicholas Bellinger struct se_device *dev, 1165c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 1166c66ac9dbSNicholas Bellinger unsigned char *isid) 1167c66ac9dbSNicholas Bellinger { 11680fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 1169c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp; 1170c66ac9dbSNicholas Bellinger struct se_portal_group *tpg; 1171c66ac9dbSNicholas Bellinger 1172c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1173c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 1174c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 1175c66ac9dbSNicholas Bellinger /* 1176c66ac9dbSNicholas Bellinger * First look for a matching struct se_node_acl 1177c66ac9dbSNicholas Bellinger */ 1178c66ac9dbSNicholas Bellinger if (pr_reg->pr_reg_nacl != nacl) 1179c66ac9dbSNicholas Bellinger continue; 1180c66ac9dbSNicholas Bellinger 1181c66ac9dbSNicholas Bellinger tpg = pr_reg->pr_reg_nacl->se_tpg; 1182c66ac9dbSNicholas Bellinger /* 1183c66ac9dbSNicholas Bellinger * If this registration does NOT contain a fabric provided 1184c66ac9dbSNicholas Bellinger * ISID, then we have found a match. 1185c66ac9dbSNicholas Bellinger */ 11866708bb27SAndy Grover if (!pr_reg->isid_present_at_reg) { 1187c66ac9dbSNicholas Bellinger /* 1188c66ac9dbSNicholas Bellinger * Determine if this SCSI device server requires that 1189c66ac9dbSNicholas Bellinger * SCSI Intiatior TransportID w/ ISIDs is enforced 1190c66ac9dbSNicholas Bellinger * for fabric modules (iSCSI) requiring them. 1191c66ac9dbSNicholas Bellinger */ 1192e3d6f909SAndy Grover if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { 11930fd97ccfSChristoph Hellwig if (dev->dev_attrib.enforce_pr_isids) 1194c66ac9dbSNicholas Bellinger continue; 1195c66ac9dbSNicholas Bellinger } 119633940d09SJoern Engel atomic_inc_mb(&pr_reg->pr_res_holders); 1197c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1198c66ac9dbSNicholas Bellinger return pr_reg; 1199c66ac9dbSNicholas Bellinger } 1200c66ac9dbSNicholas Bellinger /* 1201c66ac9dbSNicholas Bellinger * If the *pr_reg contains a fabric defined ISID for multi-value 1202c66ac9dbSNicholas Bellinger * SCSI Initiator Port TransportIDs, then we expect a valid 1203c66ac9dbSNicholas Bellinger * matching ISID to be provided by the local SCSI Initiator Port. 1204c66ac9dbSNicholas Bellinger */ 12056708bb27SAndy Grover if (!isid) 1206c66ac9dbSNicholas Bellinger continue; 1207c66ac9dbSNicholas Bellinger if (strcmp(isid, pr_reg->pr_reg_isid)) 1208c66ac9dbSNicholas Bellinger continue; 1209c66ac9dbSNicholas Bellinger 121033940d09SJoern Engel atomic_inc_mb(&pr_reg->pr_res_holders); 1211c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1212c66ac9dbSNicholas Bellinger return pr_reg; 1213c66ac9dbSNicholas Bellinger } 1214c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1215c66ac9dbSNicholas Bellinger 1216c66ac9dbSNicholas Bellinger return NULL; 1217c66ac9dbSNicholas Bellinger } 1218c66ac9dbSNicholas Bellinger 1219c66ac9dbSNicholas Bellinger static struct t10_pr_registration *core_scsi3_locate_pr_reg( 1220c66ac9dbSNicholas Bellinger struct se_device *dev, 1221c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 1222c66ac9dbSNicholas Bellinger struct se_session *sess) 1223c66ac9dbSNicholas Bellinger { 1224c66ac9dbSNicholas Bellinger struct se_portal_group *tpg = nacl->se_tpg; 1225c66ac9dbSNicholas Bellinger unsigned char buf[PR_REG_ISID_LEN], *isid_ptr = NULL; 1226c66ac9dbSNicholas Bellinger 1227e3d6f909SAndy Grover if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { 1228c66ac9dbSNicholas Bellinger memset(&buf[0], 0, PR_REG_ISID_LEN); 1229e3d6f909SAndy Grover tpg->se_tpg_tfo->sess_get_initiator_sid(sess, &buf[0], 1230c66ac9dbSNicholas Bellinger PR_REG_ISID_LEN); 1231c66ac9dbSNicholas Bellinger isid_ptr = &buf[0]; 1232c66ac9dbSNicholas Bellinger } 1233c66ac9dbSNicholas Bellinger 1234c66ac9dbSNicholas Bellinger return __core_scsi3_locate_pr_reg(dev, nacl, isid_ptr); 1235c66ac9dbSNicholas Bellinger } 1236c66ac9dbSNicholas Bellinger 1237c66ac9dbSNicholas Bellinger static void core_scsi3_put_pr_reg(struct t10_pr_registration *pr_reg) 1238c66ac9dbSNicholas Bellinger { 123933940d09SJoern Engel atomic_dec_mb(&pr_reg->pr_res_holders); 1240c66ac9dbSNicholas Bellinger } 1241c66ac9dbSNicholas Bellinger 1242125d0119SHannes Reinecke static int core_scsi3_check_implicit_release( 1243c66ac9dbSNicholas Bellinger struct se_device *dev, 1244c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg) 1245c66ac9dbSNicholas Bellinger { 1246c66ac9dbSNicholas Bellinger struct se_node_acl *nacl = pr_reg->pr_reg_nacl; 1247c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_res_holder; 1248c66ac9dbSNicholas Bellinger int ret = 0; 1249c66ac9dbSNicholas Bellinger 1250c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 1251c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 12526708bb27SAndy Grover if (!pr_res_holder) { 1253c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1254c66ac9dbSNicholas Bellinger return ret; 1255c66ac9dbSNicholas Bellinger } 1256c66ac9dbSNicholas Bellinger if (pr_res_holder == pr_reg) { 1257c66ac9dbSNicholas Bellinger /* 1258125d0119SHannes Reinecke * Perform an implicit RELEASE if the registration that 1259c66ac9dbSNicholas Bellinger * is being released is holding the reservation. 1260c66ac9dbSNicholas Bellinger * 1261c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.11.1: 1262c66ac9dbSNicholas Bellinger * 1263c66ac9dbSNicholas Bellinger * e) If the I_T nexus is the persistent reservation holder 1264c66ac9dbSNicholas Bellinger * and the persistent reservation is not an all registrants 1265c66ac9dbSNicholas Bellinger * type, then a PERSISTENT RESERVE OUT command with REGISTER 1266c66ac9dbSNicholas Bellinger * service action or REGISTER AND IGNORE EXISTING KEY 1267c66ac9dbSNicholas Bellinger * service action with the SERVICE ACTION RESERVATION KEY 1268c66ac9dbSNicholas Bellinger * field set to zero (see 5.7.11.3). 1269c66ac9dbSNicholas Bellinger */ 12706c3c9baaSNicholas Bellinger __core_scsi3_complete_pro_release(dev, nacl, pr_reg, 0, 1); 1271c66ac9dbSNicholas Bellinger ret = 1; 1272c66ac9dbSNicholas Bellinger /* 1273c66ac9dbSNicholas Bellinger * For 'All Registrants' reservation types, all existing 1274c66ac9dbSNicholas Bellinger * registrations are still processed as reservation holders 1275c66ac9dbSNicholas Bellinger * in core_scsi3_pr_seq_non_holder() after the initial 1276125d0119SHannes Reinecke * reservation holder is implicitly released here. 1277c66ac9dbSNicholas Bellinger */ 1278c66ac9dbSNicholas Bellinger } else if (pr_reg->pr_reg_all_tg_pt && 1279c66ac9dbSNicholas Bellinger (!strcmp(pr_res_holder->pr_reg_nacl->initiatorname, 1280c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->initiatorname)) && 1281c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_key == pr_reg->pr_res_key)) { 12826708bb27SAndy Grover pr_err("SPC-3 PR: Unable to perform ALL_TG_PT=1" 1283c66ac9dbSNicholas Bellinger " UNREGISTER while existing reservation with matching" 1284c66ac9dbSNicholas Bellinger " key 0x%016Lx is present from another SCSI Initiator" 1285c66ac9dbSNicholas Bellinger " Port\n", pr_reg->pr_res_key); 1286e3d6f909SAndy Grover ret = -EPERM; 1287c66ac9dbSNicholas Bellinger } 1288c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1289c66ac9dbSNicholas Bellinger 1290c66ac9dbSNicholas Bellinger return ret; 1291c66ac9dbSNicholas Bellinger } 1292c66ac9dbSNicholas Bellinger 1293c66ac9dbSNicholas Bellinger /* 1294e3d6f909SAndy Grover * Called with struct t10_reservation->registration_lock held. 1295c66ac9dbSNicholas Bellinger */ 1296c66ac9dbSNicholas Bellinger static void __core_scsi3_free_registration( 1297c66ac9dbSNicholas Bellinger struct se_device *dev, 1298c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 1299c66ac9dbSNicholas Bellinger struct list_head *preempt_and_abort_list, 1300c66ac9dbSNicholas Bellinger int dec_holders) 1301cb0df4d3SBart Van Assche __releases(&pr_tmpl->registration_lock) 1302cb0df4d3SBart Van Assche __acquires(&pr_tmpl->registration_lock) 1303c66ac9dbSNicholas Bellinger { 13049ac8928eSChristoph Hellwig const struct target_core_fabric_ops *tfo = 1305c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 13060fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 130780bfdfa9SNicholas Bellinger struct se_node_acl *nacl = pr_reg->pr_reg_nacl; 130880bfdfa9SNicholas Bellinger struct se_dev_entry *deve; 1309c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 1310c66ac9dbSNicholas Bellinger 1311c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1312d2843c17SAndy Grover core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1313c66ac9dbSNicholas Bellinger 13146c3c9baaSNicholas Bellinger if (!list_empty(&pr_reg->pr_reg_list)) 1315c66ac9dbSNicholas Bellinger list_del(&pr_reg->pr_reg_list); 1316c66ac9dbSNicholas Bellinger /* 1317c66ac9dbSNicholas Bellinger * Caller accessing *pr_reg using core_scsi3_locate_pr_reg(), 1318c66ac9dbSNicholas Bellinger * so call core_scsi3_put_pr_reg() to decrement our reference. 1319c66ac9dbSNicholas Bellinger */ 1320c66ac9dbSNicholas Bellinger if (dec_holders) 1321c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 132280bfdfa9SNicholas Bellinger 132380bfdfa9SNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1324c66ac9dbSNicholas Bellinger /* 1325c66ac9dbSNicholas Bellinger * Wait until all reference from any other I_T nexuses for this 1326c66ac9dbSNicholas Bellinger * *pr_reg have been released. Because list_del() is called above, 1327c66ac9dbSNicholas Bellinger * the last core_scsi3_put_pr_reg(pr_reg) will release this reference 1328c66ac9dbSNicholas Bellinger * count back to zero, and we release *pr_reg. 1329c66ac9dbSNicholas Bellinger */ 1330c66ac9dbSNicholas Bellinger while (atomic_read(&pr_reg->pr_res_holders) != 0) { 13316708bb27SAndy Grover pr_debug("SPC-3 PR [%s] waiting for pr_res_holders\n", 1332c66ac9dbSNicholas Bellinger tfo->get_fabric_name()); 1333c66ac9dbSNicholas Bellinger cpu_relax(); 1334c66ac9dbSNicholas Bellinger } 1335c66ac9dbSNicholas Bellinger 133680bfdfa9SNicholas Bellinger rcu_read_lock(); 133780bfdfa9SNicholas Bellinger deve = target_nacl_find_deve(nacl, pr_reg->pr_res_mapped_lun); 133880bfdfa9SNicholas Bellinger if (deve) 133980bfdfa9SNicholas Bellinger clear_bit(DEF_PR_REG_ACTIVE, &deve->deve_flags); 134080bfdfa9SNicholas Bellinger rcu_read_unlock(); 134180bfdfa9SNicholas Bellinger 134280bfdfa9SNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 13436708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: UNREGISTER Initiator" 1344c66ac9dbSNicholas Bellinger " Node: %s%s\n", tfo->get_fabric_name(), 1345c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->initiatorname, 1346d2843c17SAndy Grover i_buf); 13476708bb27SAndy Grover pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target" 1348c66ac9dbSNicholas Bellinger " Port(s)\n", tfo->get_fabric_name(), 1349c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE", 1350e3d6f909SAndy Grover dev->transport->name); 13516708bb27SAndy Grover pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:" 1352c66ac9dbSNicholas Bellinger " 0x%08x\n", tfo->get_fabric_name(), pr_reg->pr_res_key, 1353c66ac9dbSNicholas Bellinger pr_reg->pr_res_generation); 1354c66ac9dbSNicholas Bellinger 13556708bb27SAndy Grover if (!preempt_and_abort_list) { 1356c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve = NULL; 1357c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = NULL; 1358c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 1359c66ac9dbSNicholas Bellinger return; 1360c66ac9dbSNicholas Bellinger } 1361c66ac9dbSNicholas Bellinger /* 1362c66ac9dbSNicholas Bellinger * For PREEMPT_AND_ABORT, the list of *pr_reg in preempt_and_abort_list 1363c66ac9dbSNicholas Bellinger * are released once the ABORT_TASK_SET has completed.. 1364c66ac9dbSNicholas Bellinger */ 1365c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg->pr_reg_abort_list, preempt_and_abort_list); 1366c66ac9dbSNicholas Bellinger } 1367c66ac9dbSNicholas Bellinger 1368c66ac9dbSNicholas Bellinger void core_scsi3_free_pr_reg_from_nacl( 1369c66ac9dbSNicholas Bellinger struct se_device *dev, 1370c66ac9dbSNicholas Bellinger struct se_node_acl *nacl) 1371c66ac9dbSNicholas Bellinger { 13720fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 1373c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder; 13746c3c9baaSNicholas Bellinger bool free_reg = false; 1375c66ac9dbSNicholas Bellinger /* 1376c66ac9dbSNicholas Bellinger * If the passed se_node_acl matches the reservation holder, 1377c66ac9dbSNicholas Bellinger * release the reservation. 1378c66ac9dbSNicholas Bellinger */ 1379c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 1380c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 1381c66ac9dbSNicholas Bellinger if ((pr_res_holder != NULL) && 13826c3c9baaSNicholas Bellinger (pr_res_holder->pr_reg_nacl == nacl)) { 13836c3c9baaSNicholas Bellinger __core_scsi3_complete_pro_release(dev, nacl, pr_res_holder, 0, 1); 13846c3c9baaSNicholas Bellinger free_reg = true; 13856c3c9baaSNicholas Bellinger } 1386c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1387c66ac9dbSNicholas Bellinger /* 1388c66ac9dbSNicholas Bellinger * Release any registration associated with the struct se_node_acl. 1389c66ac9dbSNicholas Bellinger */ 1390c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 13916c3c9baaSNicholas Bellinger if (pr_res_holder && free_reg) 13926c3c9baaSNicholas Bellinger __core_scsi3_free_registration(dev, pr_res_holder, NULL, 0); 13936c3c9baaSNicholas Bellinger 1394c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 1395c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 1396c66ac9dbSNicholas Bellinger 1397c66ac9dbSNicholas Bellinger if (pr_reg->pr_reg_nacl != nacl) 1398c66ac9dbSNicholas Bellinger continue; 1399c66ac9dbSNicholas Bellinger 1400c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, NULL, 0); 1401c66ac9dbSNicholas Bellinger } 1402c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1403c66ac9dbSNicholas Bellinger } 1404c66ac9dbSNicholas Bellinger 1405c66ac9dbSNicholas Bellinger void core_scsi3_free_all_registrations( 1406c66ac9dbSNicholas Bellinger struct se_device *dev) 1407c66ac9dbSNicholas Bellinger { 14080fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 1409c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder; 1410c66ac9dbSNicholas Bellinger 1411c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 1412c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 1413c66ac9dbSNicholas Bellinger if (pr_res_holder != NULL) { 1414c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 1415c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, pr_res_nacl, 14166c3c9baaSNicholas Bellinger pr_res_holder, 0, 0); 1417c66ac9dbSNicholas Bellinger } 1418c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1419c66ac9dbSNicholas Bellinger 1420c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1421c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 1422c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 1423c66ac9dbSNicholas Bellinger 1424c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, NULL, 0); 1425c66ac9dbSNicholas Bellinger } 1426c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1427c66ac9dbSNicholas Bellinger 1428c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->aptpl_reg_lock); 1429c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, 1430c66ac9dbSNicholas Bellinger pr_reg_aptpl_list) { 1431c66ac9dbSNicholas Bellinger list_del(&pr_reg->pr_reg_aptpl_list); 1432c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 1433c66ac9dbSNicholas Bellinger } 1434c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->aptpl_reg_lock); 1435c66ac9dbSNicholas Bellinger } 1436c66ac9dbSNicholas Bellinger 1437c66ac9dbSNicholas Bellinger static int core_scsi3_tpg_depend_item(struct se_portal_group *tpg) 1438c66ac9dbSNicholas Bellinger { 1439d588cf8fSChristoph Hellwig return target_depend_item(&tpg->tpg_group.cg_item); 1440c66ac9dbSNicholas Bellinger } 1441c66ac9dbSNicholas Bellinger 1442c66ac9dbSNicholas Bellinger static void core_scsi3_tpg_undepend_item(struct se_portal_group *tpg) 1443c66ac9dbSNicholas Bellinger { 1444d588cf8fSChristoph Hellwig target_undepend_item(&tpg->tpg_group.cg_item); 144533940d09SJoern Engel atomic_dec_mb(&tpg->tpg_pr_ref_count); 1446c66ac9dbSNicholas Bellinger } 1447c66ac9dbSNicholas Bellinger 1448c66ac9dbSNicholas Bellinger static int core_scsi3_nodeacl_depend_item(struct se_node_acl *nacl) 1449c66ac9dbSNicholas Bellinger { 1450c66ac9dbSNicholas Bellinger if (nacl->dynamic_node_acl) 1451c66ac9dbSNicholas Bellinger return 0; 1452d588cf8fSChristoph Hellwig return target_depend_item(&nacl->acl_group.cg_item); 1453c66ac9dbSNicholas Bellinger } 1454c66ac9dbSNicholas Bellinger 1455c66ac9dbSNicholas Bellinger static void core_scsi3_nodeacl_undepend_item(struct se_node_acl *nacl) 1456c66ac9dbSNicholas Bellinger { 1457d588cf8fSChristoph Hellwig if (!nacl->dynamic_node_acl) 1458d588cf8fSChristoph Hellwig target_undepend_item(&nacl->acl_group.cg_item); 145933940d09SJoern Engel atomic_dec_mb(&nacl->acl_pr_ref_count); 1460c66ac9dbSNicholas Bellinger } 1461c66ac9dbSNicholas Bellinger 1462c66ac9dbSNicholas Bellinger static int core_scsi3_lunacl_depend_item(struct se_dev_entry *se_deve) 1463c66ac9dbSNicholas Bellinger { 146479dc9c9eSNicholas Bellinger struct se_lun_acl *lun_acl; 1465ac75d8beSBart Van Assche 1466c66ac9dbSNicholas Bellinger /* 1467c66ac9dbSNicholas Bellinger * For nacl->dynamic_node_acl=1 1468c66ac9dbSNicholas Bellinger */ 146979dc9c9eSNicholas Bellinger lun_acl = rcu_dereference_check(se_deve->se_lun_acl, 14702c935bc5SPeter Zijlstra kref_read(&se_deve->pr_kref) != 0); 14716708bb27SAndy Grover if (!lun_acl) 1472c66ac9dbSNicholas Bellinger return 0; 1473c66ac9dbSNicholas Bellinger 1474d588cf8fSChristoph Hellwig return target_depend_item(&lun_acl->se_lun_group.cg_item); 1475c66ac9dbSNicholas Bellinger } 1476c66ac9dbSNicholas Bellinger 1477c66ac9dbSNicholas Bellinger static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *se_deve) 1478c66ac9dbSNicholas Bellinger { 147929a05deeSNicholas Bellinger struct se_lun_acl *lun_acl; 1480ac75d8beSBart Van Assche 1481c66ac9dbSNicholas Bellinger /* 1482c66ac9dbSNicholas Bellinger * For nacl->dynamic_node_acl=1 1483c66ac9dbSNicholas Bellinger */ 148479dc9c9eSNicholas Bellinger lun_acl = rcu_dereference_check(se_deve->se_lun_acl, 14852c935bc5SPeter Zijlstra kref_read(&se_deve->pr_kref) != 0); 14866708bb27SAndy Grover if (!lun_acl) { 148729a05deeSNicholas Bellinger kref_put(&se_deve->pr_kref, target_pr_kref_release); 1488c66ac9dbSNicholas Bellinger return; 1489c66ac9dbSNicholas Bellinger } 1490c66ac9dbSNicholas Bellinger 1491d588cf8fSChristoph Hellwig target_undepend_item(&lun_acl->se_lun_group.cg_item); 149229a05deeSNicholas Bellinger kref_put(&se_deve->pr_kref, target_pr_kref_release); 1493c66ac9dbSNicholas Bellinger } 1494c66ac9dbSNicholas Bellinger 1495de103c93SChristoph Hellwig static sense_reason_t 1496de103c93SChristoph Hellwig core_scsi3_decode_spec_i_port( 1497c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 1498c66ac9dbSNicholas Bellinger struct se_portal_group *tpg, 1499c66ac9dbSNicholas Bellinger unsigned char *l_isid, 1500c66ac9dbSNicholas Bellinger u64 sa_res_key, 1501c66ac9dbSNicholas Bellinger int all_tg_pt, 1502c66ac9dbSNicholas Bellinger int aptpl) 1503c66ac9dbSNicholas Bellinger { 15045951146dSAndy Grover struct se_device *dev = cmd->se_dev; 1505c66ac9dbSNicholas Bellinger struct se_portal_group *dest_tpg = NULL, *tmp_tpg; 1506e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 1507c66ac9dbSNicholas Bellinger struct se_node_acl *dest_node_acl = NULL; 150879dc9c9eSNicholas Bellinger struct se_dev_entry *dest_se_deve = NULL; 1509c66ac9dbSNicholas Bellinger struct t10_pr_registration *dest_pr_reg, *local_pr_reg, *pr_reg_e; 1510c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe; 1511d0f474e5SRoland Dreier LIST_HEAD(tid_dest_list); 1512c66ac9dbSNicholas Bellinger struct pr_transport_id_holder *tidh_new, *tidh, *tidh_tmp; 15132650d71eSChristoph Hellwig unsigned char *buf, *ptr, proto_ident; 15149b353cc8SSagi Grimberg const unsigned char *i_str = NULL; 151513ba564cSJulia Lawall char *iport_ptr = NULL, i_buf[PR_REG_ISID_ID_LEN]; 1516de103c93SChristoph Hellwig sense_reason_t ret; 1517c66ac9dbSNicholas Bellinger u32 tpdl, tid_len = 0; 1518c66ac9dbSNicholas Bellinger u32 dest_rtpi = 0; 1519c66ac9dbSNicholas Bellinger 1520c66ac9dbSNicholas Bellinger /* 1521c66ac9dbSNicholas Bellinger * Allocate a struct pr_transport_id_holder and setup the 152279dc9c9eSNicholas Bellinger * local_node_acl pointer and add to struct list_head tid_dest_list 152379dc9c9eSNicholas Bellinger * for add registration processing in the loop of tid_dest_list below. 1524c66ac9dbSNicholas Bellinger */ 1525c66ac9dbSNicholas Bellinger tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), GFP_KERNEL); 15266708bb27SAndy Grover if (!tidh_new) { 15276708bb27SAndy Grover pr_err("Unable to allocate tidh_new\n"); 152879dd6f2fStangwenji return TCM_INSUFFICIENT_REGISTRATION_RESOURCES; 1529c66ac9dbSNicholas Bellinger } 1530c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&tidh_new->dest_list); 1531c66ac9dbSNicholas Bellinger tidh_new->dest_tpg = tpg; 1532c66ac9dbSNicholas Bellinger tidh_new->dest_node_acl = se_sess->se_node_acl; 1533c66ac9dbSNicholas Bellinger 15345951146dSAndy Grover local_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev, 153579dc9c9eSNicholas Bellinger se_sess->se_node_acl, cmd->se_lun, 153679dc9c9eSNicholas Bellinger NULL, cmd->orig_fe_lun, l_isid, 1537c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl); 15386708bb27SAndy Grover if (!local_pr_reg) { 1539c66ac9dbSNicholas Bellinger kfree(tidh_new); 154079dd6f2fStangwenji return TCM_INSUFFICIENT_REGISTRATION_RESOURCES; 1541c66ac9dbSNicholas Bellinger } 1542c66ac9dbSNicholas Bellinger tidh_new->dest_pr_reg = local_pr_reg; 1543c66ac9dbSNicholas Bellinger /* 1544c66ac9dbSNicholas Bellinger * The local I_T nexus does not hold any configfs dependances, 154579dc9c9eSNicholas Bellinger * so we set tidh_new->dest_se_deve to NULL to prevent the 1546c66ac9dbSNicholas Bellinger * configfs_undepend_item() calls in the tid_dest_list loops below. 1547c66ac9dbSNicholas Bellinger */ 154879dc9c9eSNicholas Bellinger tidh_new->dest_se_deve = NULL; 1549c66ac9dbSNicholas Bellinger list_add_tail(&tidh_new->dest_list, &tid_dest_list); 155005d1c7c0SAndy Grover 15510d7f1299SPaolo Bonzini if (cmd->data_length < 28) { 15520d7f1299SPaolo Bonzini pr_warn("SPC-PR: Received PR OUT parameter list" 15530d7f1299SPaolo Bonzini " length too small: %u\n", cmd->data_length); 1554de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 15550d7f1299SPaolo Bonzini goto out; 15560d7f1299SPaolo Bonzini } 15570d7f1299SPaolo Bonzini 15584949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 1559de103c93SChristoph Hellwig if (!buf) { 156079dd6f2fStangwenji ret = TCM_INSUFFICIENT_REGISTRATION_RESOURCES; 1561de103c93SChristoph Hellwig goto out; 1562de103c93SChristoph Hellwig } 1563de103c93SChristoph Hellwig 1564c66ac9dbSNicholas Bellinger /* 1565c66ac9dbSNicholas Bellinger * For a PERSISTENT RESERVE OUT specify initiator ports payload, 1566c66ac9dbSNicholas Bellinger * first extract TransportID Parameter Data Length, and make sure 1567c66ac9dbSNicholas Bellinger * the value matches up to the SCSI expected data transfer length. 1568c66ac9dbSNicholas Bellinger */ 1569a85d667eSBart Van Assche tpdl = get_unaligned_be32(&buf[24]); 1570c66ac9dbSNicholas Bellinger 1571c66ac9dbSNicholas Bellinger if ((tpdl + 28) != cmd->data_length) { 15726708bb27SAndy Grover pr_err("SPC-3 PR: Illegal tpdl: %u + 28 byte header" 1573c66ac9dbSNicholas Bellinger " does not equal CDB data_length: %u\n", tpdl, 1574c66ac9dbSNicholas Bellinger cmd->data_length); 1575de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 1576de103c93SChristoph Hellwig goto out_unmap; 1577c66ac9dbSNicholas Bellinger } 1578c66ac9dbSNicholas Bellinger /* 1579c66ac9dbSNicholas Bellinger * Start processing the received transport IDs using the 1580c66ac9dbSNicholas Bellinger * receiving I_T Nexus portal's fabric dependent methods to 1581c66ac9dbSNicholas Bellinger * obtain the SCSI Initiator Port/Device Identifiers. 1582c66ac9dbSNicholas Bellinger */ 1583c66ac9dbSNicholas Bellinger ptr = &buf[28]; 1584c66ac9dbSNicholas Bellinger 1585c66ac9dbSNicholas Bellinger while (tpdl > 0) { 1586adf653f9SChristoph Hellwig struct se_lun *dest_lun, *tmp_lun; 158779dc9c9eSNicholas Bellinger 1588c66ac9dbSNicholas Bellinger proto_ident = (ptr[0] & 0x0f); 1589c66ac9dbSNicholas Bellinger dest_tpg = NULL; 1590c66ac9dbSNicholas Bellinger 1591c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 1592adf653f9SChristoph Hellwig list_for_each_entry(tmp_lun, &dev->dev_sep_list, lun_dev_link) { 1593adf653f9SChristoph Hellwig tmp_tpg = tmp_lun->lun_tpg; 15942650d71eSChristoph Hellwig 1595c66ac9dbSNicholas Bellinger /* 1596c66ac9dbSNicholas Bellinger * Look for the matching proto_ident provided by 1597c66ac9dbSNicholas Bellinger * the received TransportID 1598c66ac9dbSNicholas Bellinger */ 15992aeeafaeSChristoph Hellwig if (tmp_tpg->proto_id != proto_ident) 1600c66ac9dbSNicholas Bellinger continue; 1601adf653f9SChristoph Hellwig dest_rtpi = tmp_lun->lun_rtpi; 1602c66ac9dbSNicholas Bellinger 16032650d71eSChristoph Hellwig i_str = target_parse_pr_out_transport_id(tmp_tpg, 1604094bb5d7SRasmus Villemoes ptr, &tid_len, &iport_ptr); 16056708bb27SAndy Grover if (!i_str) 1606c66ac9dbSNicholas Bellinger continue; 1607c66ac9dbSNicholas Bellinger 160833940d09SJoern Engel atomic_inc_mb(&tmp_tpg->tpg_pr_ref_count); 1609c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 1610c66ac9dbSNicholas Bellinger 1611de103c93SChristoph Hellwig if (core_scsi3_tpg_depend_item(tmp_tpg)) { 16126708bb27SAndy Grover pr_err(" core_scsi3_tpg_depend_item()" 1613c66ac9dbSNicholas Bellinger " for tmp_tpg\n"); 161433940d09SJoern Engel atomic_dec_mb(&tmp_tpg->tpg_pr_ref_count); 1615de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1616de103c93SChristoph Hellwig goto out_unmap; 1617c66ac9dbSNicholas Bellinger } 1618c66ac9dbSNicholas Bellinger /* 161935d1efe8SMasanari Iida * Locate the destination initiator ACL to be registered 1620c66ac9dbSNicholas Bellinger * from the decoded fabric module specific TransportID 1621c66ac9dbSNicholas Bellinger * at *i_str. 1622c66ac9dbSNicholas Bellinger */ 1623403edd78SNicholas Bellinger mutex_lock(&tmp_tpg->acl_node_mutex); 1624c66ac9dbSNicholas Bellinger dest_node_acl = __core_tpg_get_initiator_node_acl( 1625c66ac9dbSNicholas Bellinger tmp_tpg, i_str); 162633940d09SJoern Engel if (dest_node_acl) 162733940d09SJoern Engel atomic_inc_mb(&dest_node_acl->acl_pr_ref_count); 1628403edd78SNicholas Bellinger mutex_unlock(&tmp_tpg->acl_node_mutex); 1629c66ac9dbSNicholas Bellinger 16306708bb27SAndy Grover if (!dest_node_acl) { 1631c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(tmp_tpg); 1632c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 1633c66ac9dbSNicholas Bellinger continue; 1634c66ac9dbSNicholas Bellinger } 1635c66ac9dbSNicholas Bellinger 1636de103c93SChristoph Hellwig if (core_scsi3_nodeacl_depend_item(dest_node_acl)) { 16376708bb27SAndy Grover pr_err("configfs_depend_item() failed" 1638c66ac9dbSNicholas Bellinger " for dest_node_acl->acl_group\n"); 163933940d09SJoern Engel atomic_dec_mb(&dest_node_acl->acl_pr_ref_count); 1640c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(tmp_tpg); 1641de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1642de103c93SChristoph Hellwig goto out_unmap; 1643c66ac9dbSNicholas Bellinger } 1644c66ac9dbSNicholas Bellinger 1645c66ac9dbSNicholas Bellinger dest_tpg = tmp_tpg; 16466708bb27SAndy Grover pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node:" 1647c66ac9dbSNicholas Bellinger " %s Port RTPI: %hu\n", 1648e3d6f909SAndy Grover dest_tpg->se_tpg_tfo->get_fabric_name(), 1649c66ac9dbSNicholas Bellinger dest_node_acl->initiatorname, dest_rtpi); 1650c66ac9dbSNicholas Bellinger 1651c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 1652c66ac9dbSNicholas Bellinger break; 1653c66ac9dbSNicholas Bellinger } 1654c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 1655c66ac9dbSNicholas Bellinger 16566708bb27SAndy Grover if (!dest_tpg) { 16576708bb27SAndy Grover pr_err("SPC-3 PR SPEC_I_PT: Unable to locate" 1658c66ac9dbSNicholas Bellinger " dest_tpg\n"); 1659de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 1660de103c93SChristoph Hellwig goto out_unmap; 1661c66ac9dbSNicholas Bellinger } 16628b1e1244SAndy Grover 16636708bb27SAndy Grover pr_debug("SPC-3 PR SPEC_I_PT: Got %s data_length: %u tpdl: %u" 1664c66ac9dbSNicholas Bellinger " tid_len: %d for %s + %s\n", 1665e3d6f909SAndy Grover dest_tpg->se_tpg_tfo->get_fabric_name(), cmd->data_length, 1666c66ac9dbSNicholas Bellinger tpdl, tid_len, i_str, iport_ptr); 16678b1e1244SAndy Grover 1668c66ac9dbSNicholas Bellinger if (tid_len > tpdl) { 16696708bb27SAndy Grover pr_err("SPC-3 PR SPEC_I_PT: Illegal tid_len:" 1670c66ac9dbSNicholas Bellinger " %u for Transport ID: %s\n", tid_len, ptr); 1671c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1672c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1673de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 1674de103c93SChristoph Hellwig goto out_unmap; 1675c66ac9dbSNicholas Bellinger } 1676c66ac9dbSNicholas Bellinger /* 1677c66ac9dbSNicholas Bellinger * Locate the desintation struct se_dev_entry pointer for matching 1678c66ac9dbSNicholas Bellinger * RELATIVE TARGET PORT IDENTIFIER on the receiving I_T Nexus 1679c66ac9dbSNicholas Bellinger * Target Port. 1680c66ac9dbSNicholas Bellinger */ 1681c66ac9dbSNicholas Bellinger dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, 1682c66ac9dbSNicholas Bellinger dest_rtpi); 16836708bb27SAndy Grover if (!dest_se_deve) { 16846708bb27SAndy Grover pr_err("Unable to locate %s dest_se_deve" 1685c66ac9dbSNicholas Bellinger " from destination RTPI: %hu\n", 1686e3d6f909SAndy Grover dest_tpg->se_tpg_tfo->get_fabric_name(), 1687c66ac9dbSNicholas Bellinger dest_rtpi); 1688c66ac9dbSNicholas Bellinger 1689c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1690c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1691de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 1692de103c93SChristoph Hellwig goto out_unmap; 1693c66ac9dbSNicholas Bellinger } 1694c66ac9dbSNicholas Bellinger 1695de103c93SChristoph Hellwig if (core_scsi3_lunacl_depend_item(dest_se_deve)) { 16966708bb27SAndy Grover pr_err("core_scsi3_lunacl_depend_item()" 1697c66ac9dbSNicholas Bellinger " failed\n"); 169829a05deeSNicholas Bellinger kref_put(&dest_se_deve->pr_kref, target_pr_kref_release); 1699c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1700c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1701de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1702de103c93SChristoph Hellwig goto out_unmap; 1703c66ac9dbSNicholas Bellinger } 17048b1e1244SAndy Grover 17056708bb27SAndy Grover pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node: %s" 1706f2d30680SHannes Reinecke " dest_se_deve mapped_lun: %llu\n", 1707e3d6f909SAndy Grover dest_tpg->se_tpg_tfo->get_fabric_name(), 1708c66ac9dbSNicholas Bellinger dest_node_acl->initiatorname, dest_se_deve->mapped_lun); 17098b1e1244SAndy Grover 1710c66ac9dbSNicholas Bellinger /* 1711c66ac9dbSNicholas Bellinger * Skip any TransportIDs that already have a registration for 1712c66ac9dbSNicholas Bellinger * this target port. 1713c66ac9dbSNicholas Bellinger */ 1714c66ac9dbSNicholas Bellinger pr_reg_e = __core_scsi3_locate_pr_reg(dev, dest_node_acl, 1715c66ac9dbSNicholas Bellinger iport_ptr); 1716c66ac9dbSNicholas Bellinger if (pr_reg_e) { 1717c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_e); 1718c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1719c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1720c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1721c66ac9dbSNicholas Bellinger ptr += tid_len; 1722c66ac9dbSNicholas Bellinger tpdl -= tid_len; 1723c66ac9dbSNicholas Bellinger tid_len = 0; 1724c66ac9dbSNicholas Bellinger continue; 1725c66ac9dbSNicholas Bellinger } 1726c66ac9dbSNicholas Bellinger /* 1727c66ac9dbSNicholas Bellinger * Allocate a struct pr_transport_id_holder and setup 1728c66ac9dbSNicholas Bellinger * the dest_node_acl and dest_se_deve pointers for the 1729c66ac9dbSNicholas Bellinger * loop below. 1730c66ac9dbSNicholas Bellinger */ 1731c66ac9dbSNicholas Bellinger tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), 1732c66ac9dbSNicholas Bellinger GFP_KERNEL); 17336708bb27SAndy Grover if (!tidh_new) { 17346708bb27SAndy Grover pr_err("Unable to allocate tidh_new\n"); 1735c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1736c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1737c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1738de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1739de103c93SChristoph Hellwig goto out_unmap; 1740c66ac9dbSNicholas Bellinger } 1741c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&tidh_new->dest_list); 1742c66ac9dbSNicholas Bellinger tidh_new->dest_tpg = dest_tpg; 1743c66ac9dbSNicholas Bellinger tidh_new->dest_node_acl = dest_node_acl; 1744c66ac9dbSNicholas Bellinger tidh_new->dest_se_deve = dest_se_deve; 1745c66ac9dbSNicholas Bellinger 1746c66ac9dbSNicholas Bellinger /* 1747c66ac9dbSNicholas Bellinger * Allocate, but do NOT add the registration for the 1748c66ac9dbSNicholas Bellinger * TransportID referenced SCSI Initiator port. This 1749c66ac9dbSNicholas Bellinger * done because of the following from spc4r17 in section 1750c66ac9dbSNicholas Bellinger * 6.14.3 wrt SPEC_I_PT: 1751c66ac9dbSNicholas Bellinger * 1752c66ac9dbSNicholas Bellinger * "If a registration fails for any initiator port (e.g., if th 1753c66ac9dbSNicholas Bellinger * logical unit does not have enough resources available to 1754c66ac9dbSNicholas Bellinger * hold the registration information), no registrations shall be 1755c66ac9dbSNicholas Bellinger * made, and the command shall be terminated with 1756c66ac9dbSNicholas Bellinger * CHECK CONDITION status." 1757c66ac9dbSNicholas Bellinger * 1758c66ac9dbSNicholas Bellinger * That means we call __core_scsi3_alloc_registration() here, 1759c66ac9dbSNicholas Bellinger * and then call __core_scsi3_add_registration() in the 1760c66ac9dbSNicholas Bellinger * 2nd loop which will never fail. 1761c66ac9dbSNicholas Bellinger */ 176279dc9c9eSNicholas Bellinger dest_lun = rcu_dereference_check(dest_se_deve->se_lun, 17632c935bc5SPeter Zijlstra kref_read(&dest_se_deve->pr_kref) != 0); 176479dc9c9eSNicholas Bellinger 17655951146dSAndy Grover dest_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev, 176679dc9c9eSNicholas Bellinger dest_node_acl, dest_lun, dest_se_deve, 176779dc9c9eSNicholas Bellinger dest_se_deve->mapped_lun, iport_ptr, 1768c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl); 17696708bb27SAndy Grover if (!dest_pr_reg) { 1770c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1771c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1772c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1773c66ac9dbSNicholas Bellinger kfree(tidh_new); 177479dd6f2fStangwenji ret = TCM_INSUFFICIENT_REGISTRATION_RESOURCES; 1775de103c93SChristoph Hellwig goto out_unmap; 1776c66ac9dbSNicholas Bellinger } 1777c66ac9dbSNicholas Bellinger tidh_new->dest_pr_reg = dest_pr_reg; 1778c66ac9dbSNicholas Bellinger list_add_tail(&tidh_new->dest_list, &tid_dest_list); 1779c66ac9dbSNicholas Bellinger 1780c66ac9dbSNicholas Bellinger ptr += tid_len; 1781c66ac9dbSNicholas Bellinger tpdl -= tid_len; 1782c66ac9dbSNicholas Bellinger tid_len = 0; 1783c66ac9dbSNicholas Bellinger 1784c66ac9dbSNicholas Bellinger } 178505d1c7c0SAndy Grover 17864949314cSAndy Grover transport_kunmap_data_sg(cmd); 178705d1c7c0SAndy Grover 1788c66ac9dbSNicholas Bellinger /* 1789c66ac9dbSNicholas Bellinger * Go ahead and create a registrations from tid_dest_list for the 1790c66ac9dbSNicholas Bellinger * SPEC_I_PT provided TransportID for the *tidh referenced dest_node_acl 1791c66ac9dbSNicholas Bellinger * and dest_se_deve. 1792c66ac9dbSNicholas Bellinger * 1793c66ac9dbSNicholas Bellinger * The SA Reservation Key from the PROUT is set for the 1794c66ac9dbSNicholas Bellinger * registration, and ALL_TG_PT is also passed. ALL_TG_PT=1 1795c66ac9dbSNicholas Bellinger * means that the TransportID Initiator port will be 1796c66ac9dbSNicholas Bellinger * registered on all of the target ports in the SCSI target device 1797c66ac9dbSNicholas Bellinger * ALL_TG_PT=0 means the registration will only be for the 1798c66ac9dbSNicholas Bellinger * SCSI target port the PROUT REGISTER with SPEC_I_PT=1 1799c66ac9dbSNicholas Bellinger * was received. 1800c66ac9dbSNicholas Bellinger */ 1801c66ac9dbSNicholas Bellinger list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) { 1802c66ac9dbSNicholas Bellinger dest_tpg = tidh->dest_tpg; 1803c66ac9dbSNicholas Bellinger dest_node_acl = tidh->dest_node_acl; 1804c66ac9dbSNicholas Bellinger dest_se_deve = tidh->dest_se_deve; 1805c66ac9dbSNicholas Bellinger dest_pr_reg = tidh->dest_pr_reg; 1806c66ac9dbSNicholas Bellinger 1807c66ac9dbSNicholas Bellinger list_del(&tidh->dest_list); 1808c66ac9dbSNicholas Bellinger kfree(tidh); 1809c66ac9dbSNicholas Bellinger 1810c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1811d2843c17SAndy Grover core_pr_dump_initiator_port(dest_pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1812c66ac9dbSNicholas Bellinger 18135951146dSAndy Grover __core_scsi3_add_registration(cmd->se_dev, dest_node_acl, 1814c66ac9dbSNicholas Bellinger dest_pr_reg, 0, 0); 1815c66ac9dbSNicholas Bellinger 18166708bb27SAndy Grover pr_debug("SPC-3 PR [%s] SPEC_I_PT: Successfully" 1817c66ac9dbSNicholas Bellinger " registered Transport ID for Node: %s%s Mapped LUN:" 1818f2d30680SHannes Reinecke " %llu\n", dest_tpg->se_tpg_tfo->get_fabric_name(), 181979dc9c9eSNicholas Bellinger dest_node_acl->initiatorname, i_buf, (dest_se_deve) ? 182079dc9c9eSNicholas Bellinger dest_se_deve->mapped_lun : 0); 1821c66ac9dbSNicholas Bellinger 18223ccd6e83SNicholas Bellinger if (!dest_se_deve) { 18233ccd6e83SNicholas Bellinger kref_put(&local_pr_reg->pr_reg_deve->pr_kref, 18243ccd6e83SNicholas Bellinger target_pr_kref_release); 1825c66ac9dbSNicholas Bellinger continue; 18263ccd6e83SNicholas Bellinger } 1827c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1828c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1829c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1830c66ac9dbSNicholas Bellinger } 1831c66ac9dbSNicholas Bellinger 1832c66ac9dbSNicholas Bellinger return 0; 1833de103c93SChristoph Hellwig out_unmap: 18344949314cSAndy Grover transport_kunmap_data_sg(cmd); 1835de103c93SChristoph Hellwig out: 1836c66ac9dbSNicholas Bellinger /* 1837c66ac9dbSNicholas Bellinger * For the failure case, release everything from tid_dest_list 1838c66ac9dbSNicholas Bellinger * including *dest_pr_reg and the configfs dependances.. 1839c66ac9dbSNicholas Bellinger */ 1840c66ac9dbSNicholas Bellinger list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) { 1841c66ac9dbSNicholas Bellinger dest_tpg = tidh->dest_tpg; 1842c66ac9dbSNicholas Bellinger dest_node_acl = tidh->dest_node_acl; 1843c66ac9dbSNicholas Bellinger dest_se_deve = tidh->dest_se_deve; 1844c66ac9dbSNicholas Bellinger dest_pr_reg = tidh->dest_pr_reg; 1845c66ac9dbSNicholas Bellinger 1846c66ac9dbSNicholas Bellinger list_del(&tidh->dest_list); 1847c66ac9dbSNicholas Bellinger kfree(tidh); 1848c66ac9dbSNicholas Bellinger /* 1849c66ac9dbSNicholas Bellinger * Release any extra ALL_TG_PT=1 registrations for 1850c66ac9dbSNicholas Bellinger * the SPEC_I_PT=1 case. 1851c66ac9dbSNicholas Bellinger */ 1852c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, 1853c66ac9dbSNicholas Bellinger &dest_pr_reg->pr_reg_atp_list, 1854c66ac9dbSNicholas Bellinger pr_reg_atp_mem_list) { 1855c66ac9dbSNicholas Bellinger list_del(&pr_reg_tmp->pr_reg_atp_mem_list); 1856c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); 1857c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp); 1858c66ac9dbSNicholas Bellinger } 1859c66ac9dbSNicholas Bellinger 1860c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, dest_pr_reg); 1861c66ac9dbSNicholas Bellinger 18623ccd6e83SNicholas Bellinger if (!dest_se_deve) { 18633ccd6e83SNicholas Bellinger kref_put(&local_pr_reg->pr_reg_deve->pr_kref, 18643ccd6e83SNicholas Bellinger target_pr_kref_release); 1865c66ac9dbSNicholas Bellinger continue; 18663ccd6e83SNicholas Bellinger } 1867c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1868c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1869c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1870c66ac9dbSNicholas Bellinger } 1871c66ac9dbSNicholas Bellinger return ret; 1872c66ac9dbSNicholas Bellinger } 1873c66ac9dbSNicholas Bellinger 18743c8a6228SAndy Grover static int core_scsi3_update_aptpl_buf( 1875c66ac9dbSNicholas Bellinger struct se_device *dev, 1876c66ac9dbSNicholas Bellinger unsigned char *buf, 18770607decdSAndy Grover u32 pr_aptpl_buf_len) 1878c66ac9dbSNicholas Bellinger { 1879c66ac9dbSNicholas Bellinger struct se_portal_group *tpg; 1880c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 1881c66ac9dbSNicholas Bellinger unsigned char tmp[512], isid_buf[32]; 1882c66ac9dbSNicholas Bellinger ssize_t len = 0; 1883c66ac9dbSNicholas Bellinger int reg_count = 0; 18843c8a6228SAndy Grover int ret = 0; 1885c66ac9dbSNicholas Bellinger 18863c8a6228SAndy Grover spin_lock(&dev->dev_reservation_lock); 18873c8a6228SAndy Grover spin_lock(&dev->t10_pr.registration_lock); 1888c66ac9dbSNicholas Bellinger /* 1889c66ac9dbSNicholas Bellinger * Walk the registration list.. 1890c66ac9dbSNicholas Bellinger */ 18910fd97ccfSChristoph Hellwig list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 1892c66ac9dbSNicholas Bellinger pr_reg_list) { 1893c66ac9dbSNicholas Bellinger 1894c66ac9dbSNicholas Bellinger tmp[0] = '\0'; 1895c66ac9dbSNicholas Bellinger isid_buf[0] = '\0'; 1896c66ac9dbSNicholas Bellinger tpg = pr_reg->pr_reg_nacl->se_tpg; 1897c66ac9dbSNicholas Bellinger /* 1898c66ac9dbSNicholas Bellinger * Write out any ISID value to APTPL metadata that was included 1899c66ac9dbSNicholas Bellinger * in the original registration. 1900c66ac9dbSNicholas Bellinger */ 1901c66ac9dbSNicholas Bellinger if (pr_reg->isid_present_at_reg) 1902c66ac9dbSNicholas Bellinger snprintf(isid_buf, 32, "initiator_sid=%s\n", 1903c66ac9dbSNicholas Bellinger pr_reg->pr_reg_isid); 1904c66ac9dbSNicholas Bellinger /* 1905c66ac9dbSNicholas Bellinger * Include special metadata if the pr_reg matches the 1906c66ac9dbSNicholas Bellinger * reservation holder. 1907c66ac9dbSNicholas Bellinger */ 1908c66ac9dbSNicholas Bellinger if (dev->dev_pr_res_holder == pr_reg) { 1909c66ac9dbSNicholas Bellinger snprintf(tmp, 512, "PR_REG_START: %d" 1910c66ac9dbSNicholas Bellinger "\ninitiator_fabric=%s\n" 1911c66ac9dbSNicholas Bellinger "initiator_node=%s\n%s" 1912c66ac9dbSNicholas Bellinger "sa_res_key=%llu\n" 1913c66ac9dbSNicholas Bellinger "res_holder=1\nres_type=%02x\n" 1914c66ac9dbSNicholas Bellinger "res_scope=%02x\nres_all_tg_pt=%d\n" 1915f2d30680SHannes Reinecke "mapped_lun=%llu\n", reg_count, 1916e3d6f909SAndy Grover tpg->se_tpg_tfo->get_fabric_name(), 1917c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->initiatorname, isid_buf, 1918c66ac9dbSNicholas Bellinger pr_reg->pr_res_key, pr_reg->pr_res_type, 1919c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope, pr_reg->pr_reg_all_tg_pt, 1920c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun); 1921c66ac9dbSNicholas Bellinger } else { 1922c66ac9dbSNicholas Bellinger snprintf(tmp, 512, "PR_REG_START: %d\n" 1923c66ac9dbSNicholas Bellinger "initiator_fabric=%s\ninitiator_node=%s\n%s" 1924c66ac9dbSNicholas Bellinger "sa_res_key=%llu\nres_holder=0\n" 1925f2d30680SHannes Reinecke "res_all_tg_pt=%d\nmapped_lun=%llu\n", 1926e3d6f909SAndy Grover reg_count, tpg->se_tpg_tfo->get_fabric_name(), 1927c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->initiatorname, isid_buf, 1928c66ac9dbSNicholas Bellinger pr_reg->pr_res_key, pr_reg->pr_reg_all_tg_pt, 1929c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun); 1930c66ac9dbSNicholas Bellinger } 1931c66ac9dbSNicholas Bellinger 193260d645a4SDan Carpenter if ((len + strlen(tmp) >= pr_aptpl_buf_len)) { 1933f161d4b4SNicholas Bellinger pr_err("Unable to update renaming APTPL metadata," 1934f161d4b4SNicholas Bellinger " reallocating larger buffer\n"); 19353c8a6228SAndy Grover ret = -EMSGSIZE; 19363c8a6228SAndy Grover goto out; 1937c66ac9dbSNicholas Bellinger } 1938c66ac9dbSNicholas Bellinger len += sprintf(buf+len, "%s", tmp); 1939c66ac9dbSNicholas Bellinger 1940c66ac9dbSNicholas Bellinger /* 1941c66ac9dbSNicholas Bellinger * Include information about the associated SCSI target port. 1942c66ac9dbSNicholas Bellinger */ 1943c66ac9dbSNicholas Bellinger snprintf(tmp, 512, "target_fabric=%s\ntarget_node=%s\n" 1944f2d30680SHannes Reinecke "tpgt=%hu\nport_rtpi=%hu\ntarget_lun=%llu\nPR_REG_END:" 1945e3d6f909SAndy Grover " %d\n", tpg->se_tpg_tfo->get_fabric_name(), 1946e3d6f909SAndy Grover tpg->se_tpg_tfo->tpg_get_wwn(tpg), 1947e3d6f909SAndy Grover tpg->se_tpg_tfo->tpg_get_tag(tpg), 194879dc9c9eSNicholas Bellinger pr_reg->tg_pt_sep_rtpi, pr_reg->pr_aptpl_target_lun, 194979dc9c9eSNicholas Bellinger reg_count); 1950c66ac9dbSNicholas Bellinger 195160d645a4SDan Carpenter if ((len + strlen(tmp) >= pr_aptpl_buf_len)) { 1952f161d4b4SNicholas Bellinger pr_err("Unable to update renaming APTPL metadata," 1953f161d4b4SNicholas Bellinger " reallocating larger buffer\n"); 19543c8a6228SAndy Grover ret = -EMSGSIZE; 19553c8a6228SAndy Grover goto out; 1956c66ac9dbSNicholas Bellinger } 1957c66ac9dbSNicholas Bellinger len += sprintf(buf+len, "%s", tmp); 1958c66ac9dbSNicholas Bellinger reg_count++; 1959c66ac9dbSNicholas Bellinger } 1960c66ac9dbSNicholas Bellinger 19616708bb27SAndy Grover if (!reg_count) 1962c66ac9dbSNicholas Bellinger len += sprintf(buf+len, "No Registrations or Reservations"); 1963c66ac9dbSNicholas Bellinger 19643c8a6228SAndy Grover out: 19653c8a6228SAndy Grover spin_unlock(&dev->t10_pr.registration_lock); 1966c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1967c66ac9dbSNicholas Bellinger 1968c66ac9dbSNicholas Bellinger return ret; 1969c66ac9dbSNicholas Bellinger } 1970c66ac9dbSNicholas Bellinger 1971c66ac9dbSNicholas Bellinger static int __core_scsi3_write_aptpl_to_file( 1972c66ac9dbSNicholas Bellinger struct se_device *dev, 19734dee96fbSAndy Grover unsigned char *buf) 1974c66ac9dbSNicholas Bellinger { 19750fd97ccfSChristoph Hellwig struct t10_wwn *wwn = &dev->t10_wwn; 1976c66ac9dbSNicholas Bellinger struct file *file; 1977c66ac9dbSNicholas Bellinger int flags = O_RDWR | O_CREAT | O_TRUNC; 1978bdc79f0eSDavid Disseldorp char *path; 19794dee96fbSAndy Grover u32 pr_aptpl_buf_len; 1980c66ac9dbSNicholas Bellinger int ret; 1981e13ec939SChristoph Hellwig loff_t pos = 0; 1982c66ac9dbSNicholas Bellinger 1983bdc79f0eSDavid Disseldorp path = kasprintf(GFP_KERNEL, "%s/pr/aptpl_%s", db_root, 1984bdc79f0eSDavid Disseldorp &wwn->unit_serial[0]); 1985bdc79f0eSDavid Disseldorp if (!path) 1986bdc79f0eSDavid Disseldorp return -ENOMEM; 1987c66ac9dbSNicholas Bellinger 1988c66ac9dbSNicholas Bellinger file = filp_open(path, flags, 0600); 19890e9b10a9SAl Viro if (IS_ERR(file)) { 19906708bb27SAndy Grover pr_err("filp_open(%s) for APTPL metadata" 1991c66ac9dbSNicholas Bellinger " failed\n", path); 1992bdc79f0eSDavid Disseldorp kfree(path); 19930e9b10a9SAl Viro return PTR_ERR(file); 1994c66ac9dbSNicholas Bellinger } 1995c66ac9dbSNicholas Bellinger 19964dee96fbSAndy Grover pr_aptpl_buf_len = (strlen(buf) + 1); /* Add extra for NULL */ 1997c66ac9dbSNicholas Bellinger 1998e13ec939SChristoph Hellwig ret = kernel_write(file, buf, pr_aptpl_buf_len, &pos); 1999c66ac9dbSNicholas Bellinger 20000e9b10a9SAl Viro if (ret < 0) 20016708bb27SAndy Grover pr_debug("Error writing APTPL metadata file: %s\n", path); 20020e9b10a9SAl Viro fput(file); 2003bdc79f0eSDavid Disseldorp kfree(path); 2004c66ac9dbSNicholas Bellinger 2005f730f915SGera Kazakov return (ret < 0) ? -EIO : 0; 2006c66ac9dbSNicholas Bellinger } 2007c66ac9dbSNicholas Bellinger 2008c66ac9dbSNicholas Bellinger /* 2009459f213bSAndy Grover * Clear the APTPL metadata if APTPL has been disabled, otherwise 2010459f213bSAndy Grover * write out the updated metadata to struct file for this SCSI device. 2011c66ac9dbSNicholas Bellinger */ 20128a391857SNicholas Bellinger static sense_reason_t core_scsi3_update_and_write_aptpl(struct se_device *dev, bool aptpl) 2013459f213bSAndy Grover { 20148a391857SNicholas Bellinger unsigned char *buf; 2015f161d4b4SNicholas Bellinger int rc, len = PR_APTPL_BUF_LEN; 2016459f213bSAndy Grover 2017459f213bSAndy Grover if (!aptpl) { 2018459f213bSAndy Grover char *null_buf = "No Registrations or Reservations\n"; 2019459f213bSAndy Grover 20208a391857SNicholas Bellinger rc = __core_scsi3_write_aptpl_to_file(dev, null_buf); 2021459f213bSAndy Grover dev->t10_pr.pr_aptpl_active = 0; 2022459f213bSAndy Grover pr_debug("SPC-3 PR: Set APTPL Bit Deactivated\n"); 20238a391857SNicholas Bellinger 20248a391857SNicholas Bellinger if (rc) 20258a391857SNicholas Bellinger return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 20268a391857SNicholas Bellinger 20278a391857SNicholas Bellinger return 0; 20288a391857SNicholas Bellinger } 2029f161d4b4SNicholas Bellinger retry: 2030f161d4b4SNicholas Bellinger buf = vzalloc(len); 2031459f213bSAndy Grover if (!buf) 20328a391857SNicholas Bellinger return TCM_OUT_OF_RESOURCES; 2033459f213bSAndy Grover 2034f161d4b4SNicholas Bellinger rc = core_scsi3_update_aptpl_buf(dev, buf, len); 20358a391857SNicholas Bellinger if (rc < 0) { 2036f161d4b4SNicholas Bellinger vfree(buf); 2037f161d4b4SNicholas Bellinger len *= 2; 2038f161d4b4SNicholas Bellinger goto retry; 20390607decdSAndy Grover } 2040de103c93SChristoph Hellwig 20418a391857SNicholas Bellinger rc = __core_scsi3_write_aptpl_to_file(dev, buf); 20428a391857SNicholas Bellinger if (rc != 0) { 2043459f213bSAndy Grover pr_err("SPC-3 PR: Could not update APTPL\n"); 2044f161d4b4SNicholas Bellinger vfree(buf); 20458a391857SNicholas Bellinger return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2046459f213bSAndy Grover } 20478a391857SNicholas Bellinger dev->t10_pr.pr_aptpl_active = 1; 2048f161d4b4SNicholas Bellinger vfree(buf); 20498a391857SNicholas Bellinger pr_debug("SPC-3 PR: Set APTPL Bit Activated\n"); 20508a391857SNicholas Bellinger return 0; 2051c66ac9dbSNicholas Bellinger } 2052c66ac9dbSNicholas Bellinger 2053de103c93SChristoph Hellwig static sense_reason_t 2054de103c93SChristoph Hellwig core_scsi3_emulate_pro_register(struct se_cmd *cmd, u64 res_key, u64 sa_res_key, 2055bc118fe4SAndy Grover bool aptpl, bool all_tg_pt, bool spec_i_pt, enum register_type register_type) 2056c66ac9dbSNicholas Bellinger { 2057e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 20585951146dSAndy Grover struct se_device *dev = cmd->se_dev; 2059e3d6f909SAndy Grover struct se_lun *se_lun = cmd->se_lun; 2060c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg; 2061bc118fe4SAndy Grover struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_reg_tmp; 20620fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 2063c66ac9dbSNicholas Bellinger unsigned char isid_buf[PR_REG_ISID_LEN], *isid_ptr = NULL; 2064a0d50f62SHannes Reinecke sense_reason_t ret = TCM_NO_SENSE; 2065fc09149dSNicholas Bellinger int pr_holder = 0, type; 2066c66ac9dbSNicholas Bellinger 20676708bb27SAndy Grover if (!se_sess || !se_lun) { 20686708bb27SAndy Grover pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); 2069de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2070c66ac9dbSNicholas Bellinger } 2071c66ac9dbSNicholas Bellinger se_tpg = se_sess->se_tpg; 2072c66ac9dbSNicholas Bellinger 2073e3d6f909SAndy Grover if (se_tpg->se_tpg_tfo->sess_get_initiator_sid) { 2074c66ac9dbSNicholas Bellinger memset(&isid_buf[0], 0, PR_REG_ISID_LEN); 2075e3d6f909SAndy Grover se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, &isid_buf[0], 2076c66ac9dbSNicholas Bellinger PR_REG_ISID_LEN); 2077c66ac9dbSNicholas Bellinger isid_ptr = &isid_buf[0]; 2078c66ac9dbSNicholas Bellinger } 2079c66ac9dbSNicholas Bellinger /* 2080c66ac9dbSNicholas Bellinger * Follow logic from spc4r17 Section 5.7.7, Register Behaviors Table 47 2081c66ac9dbSNicholas Bellinger */ 2082bc118fe4SAndy Grover pr_reg = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess); 2083bc118fe4SAndy Grover if (!pr_reg) { 2084c66ac9dbSNicholas Bellinger if (res_key) { 20856708bb27SAndy Grover pr_warn("SPC-3 PR: Reservation Key non-zero" 2086c66ac9dbSNicholas Bellinger " for SA REGISTER, returning CONFLICT\n"); 2087de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 2088c66ac9dbSNicholas Bellinger } 2089c66ac9dbSNicholas Bellinger /* 2090c66ac9dbSNicholas Bellinger * Do nothing but return GOOD status. 2091c66ac9dbSNicholas Bellinger */ 20926708bb27SAndy Grover if (!sa_res_key) 209303e98c9eSNicholas Bellinger return 0; 2094c66ac9dbSNicholas Bellinger 20956708bb27SAndy Grover if (!spec_i_pt) { 2096c66ac9dbSNicholas Bellinger /* 2097c66ac9dbSNicholas Bellinger * Perform the Service Action REGISTER on the Initiator 2098c66ac9dbSNicholas Bellinger * Port Endpoint that the PRO was received from on the 2099c66ac9dbSNicholas Bellinger * Logical Unit of the SCSI device server. 2100c66ac9dbSNicholas Bellinger */ 2101de103c93SChristoph Hellwig if (core_scsi3_alloc_registration(cmd->se_dev, 210279dc9c9eSNicholas Bellinger se_sess->se_node_acl, cmd->se_lun, 210379dc9c9eSNicholas Bellinger NULL, cmd->orig_fe_lun, isid_ptr, 2104c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl, 210533ce6a87SAndy Grover register_type, 0)) { 21066708bb27SAndy Grover pr_err("Unable to allocate" 2107c66ac9dbSNicholas Bellinger " struct t10_pr_registration\n"); 210879dd6f2fStangwenji return TCM_INSUFFICIENT_REGISTRATION_RESOURCES; 2109c66ac9dbSNicholas Bellinger } 2110c66ac9dbSNicholas Bellinger } else { 2111c66ac9dbSNicholas Bellinger /* 2112c66ac9dbSNicholas Bellinger * Register both the Initiator port that received 2113c66ac9dbSNicholas Bellinger * PROUT SA REGISTER + SPEC_I_PT=1 and extract SCSI 2114c66ac9dbSNicholas Bellinger * TransportID from Parameter list and loop through 2115c66ac9dbSNicholas Bellinger * fabric dependent parameter list while calling 2116c66ac9dbSNicholas Bellinger * logic from of core_scsi3_alloc_registration() for 2117c66ac9dbSNicholas Bellinger * each TransportID provided SCSI Initiator Port/Device 2118c66ac9dbSNicholas Bellinger */ 2119c66ac9dbSNicholas Bellinger ret = core_scsi3_decode_spec_i_port(cmd, se_tpg, 2120c66ac9dbSNicholas Bellinger isid_ptr, sa_res_key, all_tg_pt, aptpl); 2121c66ac9dbSNicholas Bellinger if (ret != 0) 2122c66ac9dbSNicholas Bellinger return ret; 2123c66ac9dbSNicholas Bellinger } 2124459f213bSAndy Grover return core_scsi3_update_and_write_aptpl(dev, aptpl); 2125de103c93SChristoph Hellwig } 2126de103c93SChristoph Hellwig 2127bc118fe4SAndy Grover /* ok, existing registration */ 2128c66ac9dbSNicholas Bellinger 2129bc118fe4SAndy Grover if ((register_type == REGISTER) && (res_key != pr_reg->pr_res_key)) { 21306708bb27SAndy Grover pr_err("SPC-3 PR REGISTER: Received" 2131c66ac9dbSNicholas Bellinger " res_key: 0x%016Lx does not match" 2132c66ac9dbSNicholas Bellinger " existing SA REGISTER res_key:" 2133c66ac9dbSNicholas Bellinger " 0x%016Lx\n", res_key, 2134c66ac9dbSNicholas Bellinger pr_reg->pr_res_key); 2135de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 2136bc118fe4SAndy Grover goto out; 2137c66ac9dbSNicholas Bellinger } 2138de103c93SChristoph Hellwig 2139c66ac9dbSNicholas Bellinger if (spec_i_pt) { 21401f070cc2SAndy Grover pr_err("SPC-3 PR REGISTER: SPEC_I_PT" 21411f070cc2SAndy Grover " set on a registered nexus\n"); 2142de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 2143bc118fe4SAndy Grover goto out; 2144c66ac9dbSNicholas Bellinger } 2145de103c93SChristoph Hellwig 2146c66ac9dbSNicholas Bellinger /* 2147c66ac9dbSNicholas Bellinger * An existing ALL_TG_PT=1 registration being released 2148c66ac9dbSNicholas Bellinger * must also set ALL_TG_PT=1 in the incoming PROUT. 2149c66ac9dbSNicholas Bellinger */ 21501f070cc2SAndy Grover if (pr_reg->pr_reg_all_tg_pt && !all_tg_pt) { 21511f070cc2SAndy Grover pr_err("SPC-3 PR REGISTER: ALL_TG_PT=1" 2152c66ac9dbSNicholas Bellinger " registration exists, but ALL_TG_PT=1 bit not" 2153c66ac9dbSNicholas Bellinger " present in received PROUT\n"); 2154de103c93SChristoph Hellwig ret = TCM_INVALID_CDB_FIELD; 2155bc118fe4SAndy Grover goto out; 2156c66ac9dbSNicholas Bellinger } 2157de103c93SChristoph Hellwig 2158c66ac9dbSNicholas Bellinger /* 215951d9c41dSAndy Grover * sa_res_key=1 Change Reservation Key for registered I_T Nexus. 2160c66ac9dbSNicholas Bellinger */ 216151d9c41dSAndy Grover if (sa_res_key) { 216251d9c41dSAndy Grover /* 216351d9c41dSAndy Grover * Increment PRgeneration counter for struct se_device" 216451d9c41dSAndy Grover * upon a successful REGISTER, see spc4r17 section 6.3.2 216551d9c41dSAndy Grover * READ_KEYS service action. 216651d9c41dSAndy Grover */ 216751d9c41dSAndy Grover pr_reg->pr_res_generation = core_scsi3_pr_generation(cmd->se_dev); 216851d9c41dSAndy Grover pr_reg->pr_res_key = sa_res_key; 216951d9c41dSAndy Grover pr_debug("SPC-3 PR [%s] REGISTER%s: Changed Reservation" 217051d9c41dSAndy Grover " Key for %s to: 0x%016Lx PRgeneration:" 217151d9c41dSAndy Grover " 0x%08x\n", cmd->se_tfo->get_fabric_name(), 217251d9c41dSAndy Grover (register_type == REGISTER_AND_IGNORE_EXISTING_KEY) ? "_AND_IGNORE_EXISTING_KEY" : "", 217351d9c41dSAndy Grover pr_reg->pr_reg_nacl->initiatorname, 217451d9c41dSAndy Grover pr_reg->pr_res_key, pr_reg->pr_res_generation); 217551d9c41dSAndy Grover 217651d9c41dSAndy Grover } else { 217751d9c41dSAndy Grover /* 217851d9c41dSAndy Grover * sa_res_key=0 Unregister Reservation Key for registered I_T Nexus. 217951d9c41dSAndy Grover */ 21806c3c9baaSNicholas Bellinger type = pr_reg->pr_res_type; 21816c3c9baaSNicholas Bellinger pr_holder = core_scsi3_check_implicit_release(cmd->se_dev, 21826c3c9baaSNicholas Bellinger pr_reg); 2183c66ac9dbSNicholas Bellinger if (pr_holder < 0) { 2184de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 2185bc118fe4SAndy Grover goto out; 2186c66ac9dbSNicholas Bellinger } 2187c66ac9dbSNicholas Bellinger 2188c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 2189c66ac9dbSNicholas Bellinger /* 2190c66ac9dbSNicholas Bellinger * Release all ALL_TG_PT=1 for the matching SCSI Initiator Port 2191c66ac9dbSNicholas Bellinger * and matching pr_res_key. 2192c66ac9dbSNicholas Bellinger */ 2193c66ac9dbSNicholas Bellinger if (pr_reg->pr_reg_all_tg_pt) { 2194c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg_p, pr_reg_tmp, 2195c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, 2196c66ac9dbSNicholas Bellinger pr_reg_list) { 2197c66ac9dbSNicholas Bellinger 21986708bb27SAndy Grover if (!pr_reg_p->pr_reg_all_tg_pt) 2199c66ac9dbSNicholas Bellinger continue; 2200c66ac9dbSNicholas Bellinger if (pr_reg_p->pr_res_key != res_key) 2201c66ac9dbSNicholas Bellinger continue; 2202c66ac9dbSNicholas Bellinger if (pr_reg == pr_reg_p) 2203c66ac9dbSNicholas Bellinger continue; 2204c66ac9dbSNicholas Bellinger if (strcmp(pr_reg->pr_reg_nacl->initiatorname, 2205c66ac9dbSNicholas Bellinger pr_reg_p->pr_reg_nacl->initiatorname)) 2206c66ac9dbSNicholas Bellinger continue; 2207c66ac9dbSNicholas Bellinger 2208c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, 2209c66ac9dbSNicholas Bellinger pr_reg_p, NULL, 0); 2210c66ac9dbSNicholas Bellinger } 2211c66ac9dbSNicholas Bellinger } 2212de103c93SChristoph Hellwig 2213c66ac9dbSNicholas Bellinger /* 2214c66ac9dbSNicholas Bellinger * Release the calling I_T Nexus registration now.. 2215c66ac9dbSNicholas Bellinger */ 2216de103c93SChristoph Hellwig __core_scsi3_free_registration(cmd->se_dev, pr_reg, NULL, 1); 2217fc09149dSNicholas Bellinger pr_reg = NULL; 2218de103c93SChristoph Hellwig 2219c66ac9dbSNicholas Bellinger /* 2220c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.11.3 Unregistering 2221c66ac9dbSNicholas Bellinger * 2222c66ac9dbSNicholas Bellinger * If the persistent reservation is a registrants only 2223c66ac9dbSNicholas Bellinger * type, the device server shall establish a unit 2224c66ac9dbSNicholas Bellinger * attention condition for the initiator port associated 2225c66ac9dbSNicholas Bellinger * with every registered I_T nexus except for the I_T 2226c66ac9dbSNicholas Bellinger * nexus on which the PERSISTENT RESERVE OUT command was 2227c66ac9dbSNicholas Bellinger * received, with the additional sense code set to 2228c66ac9dbSNicholas Bellinger * RESERVATIONS RELEASED. 2229c66ac9dbSNicholas Bellinger */ 2230c66ac9dbSNicholas Bellinger if (pr_holder && 2231fc09149dSNicholas Bellinger (type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY || 2232fc09149dSNicholas Bellinger type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY)) { 2233c66ac9dbSNicholas Bellinger list_for_each_entry(pr_reg_p, 2234c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, 2235c66ac9dbSNicholas Bellinger pr_reg_list) { 2236c66ac9dbSNicholas Bellinger 2237c51c8e7bSHannes Reinecke target_ua_allocate_lun( 2238c66ac9dbSNicholas Bellinger pr_reg_p->pr_reg_nacl, 2239c66ac9dbSNicholas Bellinger pr_reg_p->pr_res_mapped_lun, 2240c66ac9dbSNicholas Bellinger 0x2A, 2241c66ac9dbSNicholas Bellinger ASCQ_2AH_RESERVATIONS_RELEASED); 2242c66ac9dbSNicholas Bellinger } 2243c66ac9dbSNicholas Bellinger } 224451d9c41dSAndy Grover 2245c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 2246de103c93SChristoph Hellwig } 2247de103c93SChristoph Hellwig 2248459f213bSAndy Grover ret = core_scsi3_update_and_write_aptpl(dev, aptpl); 2249c66ac9dbSNicholas Bellinger 2250bc118fe4SAndy Grover out: 2251fc09149dSNicholas Bellinger if (pr_reg) 2252c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2253de103c93SChristoph Hellwig return ret; 2254c66ac9dbSNicholas Bellinger } 2255c66ac9dbSNicholas Bellinger 2256c66ac9dbSNicholas Bellinger unsigned char *core_scsi3_pr_dump_type(int type) 2257c66ac9dbSNicholas Bellinger { 2258c66ac9dbSNicholas Bellinger switch (type) { 2259c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE: 2260c66ac9dbSNicholas Bellinger return "Write Exclusive Access"; 2261c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS: 2262c66ac9dbSNicholas Bellinger return "Exclusive Access"; 2263c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: 2264c66ac9dbSNicholas Bellinger return "Write Exclusive Access, Registrants Only"; 2265c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: 2266c66ac9dbSNicholas Bellinger return "Exclusive Access, Registrants Only"; 2267c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: 2268c66ac9dbSNicholas Bellinger return "Write Exclusive Access, All Registrants"; 2269c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: 2270c66ac9dbSNicholas Bellinger return "Exclusive Access, All Registrants"; 2271c66ac9dbSNicholas Bellinger default: 2272c66ac9dbSNicholas Bellinger break; 2273c66ac9dbSNicholas Bellinger } 2274c66ac9dbSNicholas Bellinger 2275c66ac9dbSNicholas Bellinger return "Unknown SPC-3 PR Type"; 2276c66ac9dbSNicholas Bellinger } 2277c66ac9dbSNicholas Bellinger 2278de103c93SChristoph Hellwig static sense_reason_t 2279de103c93SChristoph Hellwig core_scsi3_pro_reserve(struct se_cmd *cmd, int type, int scope, u64 res_key) 2280c66ac9dbSNicholas Bellinger { 2281de103c93SChristoph Hellwig struct se_device *dev = cmd->se_dev; 2282e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 2283e3d6f909SAndy Grover struct se_lun *se_lun = cmd->se_lun; 2284c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_res_holder; 22850fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 2286c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 2287de103c93SChristoph Hellwig sense_reason_t ret; 2288c66ac9dbSNicholas Bellinger 2289c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 2290c66ac9dbSNicholas Bellinger 22916708bb27SAndy Grover if (!se_sess || !se_lun) { 22926708bb27SAndy Grover pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); 2293de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2294c66ac9dbSNicholas Bellinger } 2295c66ac9dbSNicholas Bellinger /* 2296c66ac9dbSNicholas Bellinger * Locate the existing *pr_reg via struct se_node_acl pointers 2297c66ac9dbSNicholas Bellinger */ 22985951146dSAndy Grover pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, 2299c66ac9dbSNicholas Bellinger se_sess); 23006708bb27SAndy Grover if (!pr_reg) { 23016708bb27SAndy Grover pr_err("SPC-3 PR: Unable to locate" 2302c66ac9dbSNicholas Bellinger " PR_REGISTERED *pr_reg for RESERVE\n"); 2303de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2304c66ac9dbSNicholas Bellinger } 2305c66ac9dbSNicholas Bellinger /* 2306c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2307c66ac9dbSNicholas Bellinger * 2308c66ac9dbSNicholas Bellinger * An application client creates a persistent reservation by issuing 2309c66ac9dbSNicholas Bellinger * a PERSISTENT RESERVE OUT command with RESERVE service action through 2310c66ac9dbSNicholas Bellinger * a registered I_T nexus with the following parameters: 2311c66ac9dbSNicholas Bellinger * a) RESERVATION KEY set to the value of the reservation key that is 2312c66ac9dbSNicholas Bellinger * registered with the logical unit for the I_T nexus; and 2313c66ac9dbSNicholas Bellinger */ 2314c66ac9dbSNicholas Bellinger if (res_key != pr_reg->pr_res_key) { 23156708bb27SAndy Grover pr_err("SPC-3 PR RESERVE: Received res_key: 0x%016Lx" 2316c66ac9dbSNicholas Bellinger " does not match existing SA REGISTER res_key:" 2317c66ac9dbSNicholas Bellinger " 0x%016Lx\n", res_key, pr_reg->pr_res_key); 2318de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 2319de103c93SChristoph Hellwig goto out_put_pr_reg; 2320c66ac9dbSNicholas Bellinger } 2321c66ac9dbSNicholas Bellinger /* 2322c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2323c66ac9dbSNicholas Bellinger * 2324c66ac9dbSNicholas Bellinger * From above: 2325c66ac9dbSNicholas Bellinger * b) TYPE field and SCOPE field set to the persistent reservation 2326c66ac9dbSNicholas Bellinger * being created. 2327c66ac9dbSNicholas Bellinger * 2328c66ac9dbSNicholas Bellinger * Only one persistent reservation is allowed at a time per logical unit 2329c66ac9dbSNicholas Bellinger * and that persistent reservation has a scope of LU_SCOPE. 2330c66ac9dbSNicholas Bellinger */ 2331c66ac9dbSNicholas Bellinger if (scope != PR_SCOPE_LU_SCOPE) { 23326708bb27SAndy Grover pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope); 2333de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 2334de103c93SChristoph Hellwig goto out_put_pr_reg; 2335c66ac9dbSNicholas Bellinger } 2336c66ac9dbSNicholas Bellinger /* 2337c66ac9dbSNicholas Bellinger * See if we have an existing PR reservation holder pointer at 2338c66ac9dbSNicholas Bellinger * struct se_device->dev_pr_res_holder in the form struct t10_pr_registration 2339c66ac9dbSNicholas Bellinger * *pr_res_holder. 2340c66ac9dbSNicholas Bellinger */ 2341c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 2342c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 2343ee1b1b9cSAndy Grover if (pr_res_holder) { 2344c66ac9dbSNicholas Bellinger /* 2345c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2346c66ac9dbSNicholas Bellinger * 2347c66ac9dbSNicholas Bellinger * If the device server receives a PERSISTENT RESERVE OUT 2348c66ac9dbSNicholas Bellinger * command from an I_T nexus other than a persistent reservation 2349c66ac9dbSNicholas Bellinger * holder (see 5.7.10) that attempts to create a persistent 2350c66ac9dbSNicholas Bellinger * reservation when a persistent reservation already exists for 2351c66ac9dbSNicholas Bellinger * the logical unit, then the command shall be completed with 2352c66ac9dbSNicholas Bellinger * RESERVATION CONFLICT status. 2353c66ac9dbSNicholas Bellinger */ 2354e673dc92SIlias Tsitsimpis if (!is_reservation_holder(pr_res_holder, pr_reg)) { 2355c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 23566708bb27SAndy Grover pr_err("SPC-3 PR: Attempted RESERVE from" 2357c66ac9dbSNicholas Bellinger " [%s]: %s while reservation already held by" 2358c66ac9dbSNicholas Bellinger " [%s]: %s, returning RESERVATION_CONFLICT\n", 2359e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), 2360c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, 2361e3d6f909SAndy Grover pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 2362c66ac9dbSNicholas Bellinger pr_res_holder->pr_reg_nacl->initiatorname); 2363c66ac9dbSNicholas Bellinger 2364c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2365de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 2366de103c93SChristoph Hellwig goto out_put_pr_reg; 2367c66ac9dbSNicholas Bellinger } 2368c66ac9dbSNicholas Bellinger /* 2369c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2370c66ac9dbSNicholas Bellinger * 2371c66ac9dbSNicholas Bellinger * If a persistent reservation holder attempts to modify the 2372c66ac9dbSNicholas Bellinger * type or scope of an existing persistent reservation, the 2373c66ac9dbSNicholas Bellinger * command shall be completed with RESERVATION CONFLICT status. 2374c66ac9dbSNicholas Bellinger */ 2375c66ac9dbSNicholas Bellinger if ((pr_res_holder->pr_res_type != type) || 2376c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_scope != scope)) { 2377c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 23786708bb27SAndy Grover pr_err("SPC-3 PR: Attempted RESERVE from" 2379c66ac9dbSNicholas Bellinger " [%s]: %s trying to change TYPE and/or SCOPE," 2380c66ac9dbSNicholas Bellinger " while reservation already held by [%s]: %s," 2381c66ac9dbSNicholas Bellinger " returning RESERVATION_CONFLICT\n", 2382e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), 2383c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, 2384e3d6f909SAndy Grover pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 2385c66ac9dbSNicholas Bellinger pr_res_holder->pr_reg_nacl->initiatorname); 2386c66ac9dbSNicholas Bellinger 2387c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2388de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 2389de103c93SChristoph Hellwig goto out_put_pr_reg; 2390c66ac9dbSNicholas Bellinger } 2391c66ac9dbSNicholas Bellinger /* 2392c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2393c66ac9dbSNicholas Bellinger * 2394c66ac9dbSNicholas Bellinger * If the device server receives a PERSISTENT RESERVE OUT 2395c66ac9dbSNicholas Bellinger * command with RESERVE service action where the TYPE field and 2396c66ac9dbSNicholas Bellinger * the SCOPE field contain the same values as the existing type 2397c66ac9dbSNicholas Bellinger * and scope from a persistent reservation holder, it shall not 2398c66ac9dbSNicholas Bellinger * make any change to the existing persistent reservation and 2399c66ac9dbSNicholas Bellinger * shall completethe command with GOOD status. 2400c66ac9dbSNicholas Bellinger */ 2401c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2402de103c93SChristoph Hellwig ret = 0; 2403de103c93SChristoph Hellwig goto out_put_pr_reg; 2404c66ac9dbSNicholas Bellinger } 2405c66ac9dbSNicholas Bellinger /* 2406c66ac9dbSNicholas Bellinger * Otherwise, our *pr_reg becomes the PR reservation holder for said 2407c66ac9dbSNicholas Bellinger * TYPE/SCOPE. Also set the received scope and type in *pr_reg. 2408c66ac9dbSNicholas Bellinger */ 2409c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope = scope; 2410c66ac9dbSNicholas Bellinger pr_reg->pr_res_type = type; 2411c66ac9dbSNicholas Bellinger pr_reg->pr_res_holder = 1; 2412c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = pr_reg; 2413d2843c17SAndy Grover core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 2414c66ac9dbSNicholas Bellinger 24156708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: RESERVE created new" 2416c66ac9dbSNicholas Bellinger " reservation holder TYPE: %s ALL_TG_PT: %d\n", 2417e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), core_scsi3_pr_dump_type(type), 2418c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); 24196708bb27SAndy Grover pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n", 2420e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), 2421c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, 2422d2843c17SAndy Grover i_buf); 2423c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2424c66ac9dbSNicholas Bellinger 2425459f213bSAndy Grover if (pr_tmpl->pr_aptpl_active) 2426459f213bSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, true); 2427c66ac9dbSNicholas Bellinger 2428de103c93SChristoph Hellwig ret = 0; 2429de103c93SChristoph Hellwig out_put_pr_reg: 2430de103c93SChristoph Hellwig core_scsi3_put_pr_reg(pr_reg); 2431de103c93SChristoph Hellwig return ret; 2432de103c93SChristoph Hellwig } 2433de103c93SChristoph Hellwig 2434de103c93SChristoph Hellwig static sense_reason_t 2435de103c93SChristoph Hellwig core_scsi3_emulate_pro_reserve(struct se_cmd *cmd, int type, int scope, 2436c66ac9dbSNicholas Bellinger u64 res_key) 2437c66ac9dbSNicholas Bellinger { 2438c66ac9dbSNicholas Bellinger switch (type) { 2439c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE: 2440c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS: 2441c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: 2442c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: 2443c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: 2444c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: 2445de103c93SChristoph Hellwig return core_scsi3_pro_reserve(cmd, type, scope, res_key); 2446c66ac9dbSNicholas Bellinger default: 24476708bb27SAndy Grover pr_err("SPC-3 PR: Unknown Service Action RESERVE Type:" 2448c66ac9dbSNicholas Bellinger " 0x%02x\n", type); 2449de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 2450c66ac9dbSNicholas Bellinger } 2451c66ac9dbSNicholas Bellinger } 2452c66ac9dbSNicholas Bellinger 2453c66ac9dbSNicholas Bellinger /* 2454c66ac9dbSNicholas Bellinger * Called with struct se_device->dev_reservation_lock held. 2455c66ac9dbSNicholas Bellinger */ 2456c66ac9dbSNicholas Bellinger static void __core_scsi3_complete_pro_release( 2457c66ac9dbSNicholas Bellinger struct se_device *dev, 2458c66ac9dbSNicholas Bellinger struct se_node_acl *se_nacl, 2459c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 24606c3c9baaSNicholas Bellinger int explicit, 24616c3c9baaSNicholas Bellinger int unreg) 2462c66ac9dbSNicholas Bellinger { 24639ac8928eSChristoph Hellwig const struct target_core_fabric_ops *tfo = se_nacl->se_tpg->se_tpg_tfo; 2464c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 24656c3c9baaSNicholas Bellinger int pr_res_type = 0, pr_res_scope = 0; 2466c66ac9dbSNicholas Bellinger 2467c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 2468d2843c17SAndy Grover core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 2469c66ac9dbSNicholas Bellinger /* 2470c66ac9dbSNicholas Bellinger * Go ahead and release the current PR reservation holder. 24716c3c9baaSNicholas Bellinger * If an All Registrants reservation is currently active and 24726c3c9baaSNicholas Bellinger * a unregister operation is requested, replace the current 24736c3c9baaSNicholas Bellinger * dev_pr_res_holder with another active registration. 2474c66ac9dbSNicholas Bellinger */ 24756c3c9baaSNicholas Bellinger if (dev->dev_pr_res_holder) { 24766c3c9baaSNicholas Bellinger pr_res_type = dev->dev_pr_res_holder->pr_res_type; 24776c3c9baaSNicholas Bellinger pr_res_scope = dev->dev_pr_res_holder->pr_res_scope; 24786c3c9baaSNicholas Bellinger dev->dev_pr_res_holder->pr_res_type = 0; 24796c3c9baaSNicholas Bellinger dev->dev_pr_res_holder->pr_res_scope = 0; 24806c3c9baaSNicholas Bellinger dev->dev_pr_res_holder->pr_res_holder = 0; 2481c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = NULL; 24826c3c9baaSNicholas Bellinger } 24836c3c9baaSNicholas Bellinger if (!unreg) 24846c3c9baaSNicholas Bellinger goto out; 2485c66ac9dbSNicholas Bellinger 24866c3c9baaSNicholas Bellinger spin_lock(&dev->t10_pr.registration_lock); 24876c3c9baaSNicholas Bellinger list_del_init(&pr_reg->pr_reg_list); 24886c3c9baaSNicholas Bellinger /* 24896c3c9baaSNicholas Bellinger * If the I_T nexus is a reservation holder, the persistent reservation 24906c3c9baaSNicholas Bellinger * is of an all registrants type, and the I_T nexus is the last remaining 24916c3c9baaSNicholas Bellinger * registered I_T nexus, then the device server shall also release the 24926c3c9baaSNicholas Bellinger * persistent reservation. 24936c3c9baaSNicholas Bellinger */ 24946c3c9baaSNicholas Bellinger if (!list_empty(&dev->t10_pr.registration_list) && 24956c3c9baaSNicholas Bellinger ((pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 24966c3c9baaSNicholas Bellinger (pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG))) { 24976c3c9baaSNicholas Bellinger dev->dev_pr_res_holder = 24986c3c9baaSNicholas Bellinger list_entry(dev->t10_pr.registration_list.next, 24996c3c9baaSNicholas Bellinger struct t10_pr_registration, pr_reg_list); 25006c3c9baaSNicholas Bellinger dev->dev_pr_res_holder->pr_res_type = pr_res_type; 25016c3c9baaSNicholas Bellinger dev->dev_pr_res_holder->pr_res_scope = pr_res_scope; 25026c3c9baaSNicholas Bellinger dev->dev_pr_res_holder->pr_res_holder = 1; 25036c3c9baaSNicholas Bellinger } 25046c3c9baaSNicholas Bellinger spin_unlock(&dev->t10_pr.registration_lock); 25056c3c9baaSNicholas Bellinger out: 25066c3c9baaSNicholas Bellinger if (!dev->dev_pr_res_holder) { 25076708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: %s RELEASE cleared" 2508c66ac9dbSNicholas Bellinger " reservation holder TYPE: %s ALL_TG_PT: %d\n", 25096c3c9baaSNicholas Bellinger tfo->get_fabric_name(), (explicit) ? "explicit" : 25106c3c9baaSNicholas Bellinger "implicit", core_scsi3_pr_dump_type(pr_res_type), 2511c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); 25126c3c9baaSNicholas Bellinger } 25136708bb27SAndy Grover pr_debug("SPC-3 PR [%s] RELEASE Node: %s%s\n", 2514c66ac9dbSNicholas Bellinger tfo->get_fabric_name(), se_nacl->initiatorname, 2515d2843c17SAndy Grover i_buf); 2516c66ac9dbSNicholas Bellinger /* 2517c66ac9dbSNicholas Bellinger * Clear TYPE and SCOPE for the next PROUT Service Action: RESERVE 2518c66ac9dbSNicholas Bellinger */ 2519c66ac9dbSNicholas Bellinger pr_reg->pr_res_holder = pr_reg->pr_res_type = pr_reg->pr_res_scope = 0; 2520c66ac9dbSNicholas Bellinger } 2521c66ac9dbSNicholas Bellinger 2522de103c93SChristoph Hellwig static sense_reason_t 2523de103c93SChristoph Hellwig core_scsi3_emulate_pro_release(struct se_cmd *cmd, int type, int scope, 2524c66ac9dbSNicholas Bellinger u64 res_key) 2525c66ac9dbSNicholas Bellinger { 2526c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 2527e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 2528e3d6f909SAndy Grover struct se_lun *se_lun = cmd->se_lun; 2529c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_res_holder; 25300fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 2531de103c93SChristoph Hellwig sense_reason_t ret = 0; 2532c66ac9dbSNicholas Bellinger 25336708bb27SAndy Grover if (!se_sess || !se_lun) { 25346708bb27SAndy Grover pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); 2535de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2536c66ac9dbSNicholas Bellinger } 2537c66ac9dbSNicholas Bellinger /* 2538c66ac9dbSNicholas Bellinger * Locate the existing *pr_reg via struct se_node_acl pointers 2539c66ac9dbSNicholas Bellinger */ 2540c66ac9dbSNicholas Bellinger pr_reg = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess); 25416708bb27SAndy Grover if (!pr_reg) { 25426708bb27SAndy Grover pr_err("SPC-3 PR: Unable to locate" 2543c66ac9dbSNicholas Bellinger " PR_REGISTERED *pr_reg for RELEASE\n"); 2544de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2545c66ac9dbSNicholas Bellinger } 2546c66ac9dbSNicholas Bellinger /* 2547c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.11.2 Releasing: 2548c66ac9dbSNicholas Bellinger * 2549c66ac9dbSNicholas Bellinger * If there is no persistent reservation or in response to a persistent 2550c66ac9dbSNicholas Bellinger * reservation release request from a registered I_T nexus that is not a 2551c66ac9dbSNicholas Bellinger * persistent reservation holder (see 5.7.10), the device server shall 2552c66ac9dbSNicholas Bellinger * do the following: 2553c66ac9dbSNicholas Bellinger * 2554c66ac9dbSNicholas Bellinger * a) Not release the persistent reservation, if any; 2555c66ac9dbSNicholas Bellinger * b) Not remove any registrations; and 2556c66ac9dbSNicholas Bellinger * c) Complete the command with GOOD status. 2557c66ac9dbSNicholas Bellinger */ 2558c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 2559c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 25606708bb27SAndy Grover if (!pr_res_holder) { 2561c66ac9dbSNicholas Bellinger /* 2562c66ac9dbSNicholas Bellinger * No persistent reservation, return GOOD status. 2563c66ac9dbSNicholas Bellinger */ 2564c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2565bb7a8c8eSNicholas Bellinger goto out_put_pr_reg; 2566c66ac9dbSNicholas Bellinger } 2567c66ac9dbSNicholas Bellinger 2568e673dc92SIlias Tsitsimpis if (!is_reservation_holder(pr_res_holder, pr_reg)) { 2569c66ac9dbSNicholas Bellinger /* 2570c66ac9dbSNicholas Bellinger * Release request from a registered I_T nexus that is not a 2571c66ac9dbSNicholas Bellinger * persistent reservation holder. return GOOD status. 2572c66ac9dbSNicholas Bellinger */ 2573c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2574de103c93SChristoph Hellwig goto out_put_pr_reg; 2575c66ac9dbSNicholas Bellinger } 2576de103c93SChristoph Hellwig 2577c66ac9dbSNicholas Bellinger /* 2578c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.11.2 Releasing: 2579c66ac9dbSNicholas Bellinger * 2580c66ac9dbSNicholas Bellinger * Only the persistent reservation holder (see 5.7.10) is allowed to 2581c66ac9dbSNicholas Bellinger * release a persistent reservation. 2582c66ac9dbSNicholas Bellinger * 2583c66ac9dbSNicholas Bellinger * An application client releases the persistent reservation by issuing 2584c66ac9dbSNicholas Bellinger * a PERSISTENT RESERVE OUT command with RELEASE service action through 2585c66ac9dbSNicholas Bellinger * an I_T nexus that is a persistent reservation holder with the 2586c66ac9dbSNicholas Bellinger * following parameters: 2587c66ac9dbSNicholas Bellinger * 2588c66ac9dbSNicholas Bellinger * a) RESERVATION KEY field set to the value of the reservation key 2589c66ac9dbSNicholas Bellinger * that is registered with the logical unit for the I_T nexus; 2590c66ac9dbSNicholas Bellinger */ 2591c66ac9dbSNicholas Bellinger if (res_key != pr_reg->pr_res_key) { 25926708bb27SAndy Grover pr_err("SPC-3 PR RELEASE: Received res_key: 0x%016Lx" 2593c66ac9dbSNicholas Bellinger " does not match existing SA REGISTER res_key:" 2594c66ac9dbSNicholas Bellinger " 0x%016Lx\n", res_key, pr_reg->pr_res_key); 2595c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2596de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 2597de103c93SChristoph Hellwig goto out_put_pr_reg; 2598c66ac9dbSNicholas Bellinger } 2599c66ac9dbSNicholas Bellinger /* 2600c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.11.2 Releasing and above: 2601c66ac9dbSNicholas Bellinger * 2602c66ac9dbSNicholas Bellinger * b) TYPE field and SCOPE field set to match the persistent 2603c66ac9dbSNicholas Bellinger * reservation being released. 2604c66ac9dbSNicholas Bellinger */ 2605c66ac9dbSNicholas Bellinger if ((pr_res_holder->pr_res_type != type) || 2606c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_scope != scope)) { 2607c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 26086708bb27SAndy Grover pr_err("SPC-3 PR RELEASE: Attempted to release" 2609c66ac9dbSNicholas Bellinger " reservation from [%s]: %s with different TYPE " 2610c66ac9dbSNicholas Bellinger "and/or SCOPE while reservation already held by" 2611c66ac9dbSNicholas Bellinger " [%s]: %s, returning RESERVATION_CONFLICT\n", 2612e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), 2613c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, 2614e3d6f909SAndy Grover pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 2615c66ac9dbSNicholas Bellinger pr_res_holder->pr_reg_nacl->initiatorname); 2616c66ac9dbSNicholas Bellinger 2617c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2618de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 2619de103c93SChristoph Hellwig goto out_put_pr_reg; 2620c66ac9dbSNicholas Bellinger } 2621c66ac9dbSNicholas Bellinger /* 2622c66ac9dbSNicholas Bellinger * In response to a persistent reservation release request from the 2623c66ac9dbSNicholas Bellinger * persistent reservation holder the device server shall perform a 2624c66ac9dbSNicholas Bellinger * release by doing the following as an uninterrupted series of actions: 2625c66ac9dbSNicholas Bellinger * a) Release the persistent reservation; 2626c66ac9dbSNicholas Bellinger * b) Not remove any registration(s); 2627c66ac9dbSNicholas Bellinger * c) If the released persistent reservation is a registrants only type 2628c66ac9dbSNicholas Bellinger * or all registrants type persistent reservation, 2629c66ac9dbSNicholas Bellinger * the device server shall establish a unit attention condition for 2630c66ac9dbSNicholas Bellinger * the initiator port associated with every regis- 2631c66ac9dbSNicholas Bellinger * tered I_T nexus other than I_T nexus on which the PERSISTENT 2632c66ac9dbSNicholas Bellinger * RESERVE OUT command with RELEASE service action was received, 2633c66ac9dbSNicholas Bellinger * with the additional sense code set to RESERVATIONS RELEASED; and 2634c66ac9dbSNicholas Bellinger * d) If the persistent reservation is of any other type, the device 2635c66ac9dbSNicholas Bellinger * server shall not establish a unit attention condition. 2636c66ac9dbSNicholas Bellinger */ 2637c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, se_sess->se_node_acl, 26386c3c9baaSNicholas Bellinger pr_reg, 1, 0); 2639c66ac9dbSNicholas Bellinger 2640c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2641c66ac9dbSNicholas Bellinger 2642c66ac9dbSNicholas Bellinger if ((type != PR_TYPE_WRITE_EXCLUSIVE_REGONLY) && 2643c66ac9dbSNicholas Bellinger (type != PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) && 2644c66ac9dbSNicholas Bellinger (type != PR_TYPE_WRITE_EXCLUSIVE_ALLREG) && 2645c66ac9dbSNicholas Bellinger (type != PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { 2646c66ac9dbSNicholas Bellinger /* 2647c66ac9dbSNicholas Bellinger * If no UNIT ATTENTION conditions will be established for 2648c66ac9dbSNicholas Bellinger * PR_TYPE_WRITE_EXCLUSIVE or PR_TYPE_EXCLUSIVE_ACCESS 2649c66ac9dbSNicholas Bellinger * go ahead and check for APTPL=1 update+write below 2650c66ac9dbSNicholas Bellinger */ 2651c66ac9dbSNicholas Bellinger goto write_aptpl; 2652c66ac9dbSNicholas Bellinger } 2653c66ac9dbSNicholas Bellinger 2654c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 2655c66ac9dbSNicholas Bellinger list_for_each_entry(pr_reg_p, &pr_tmpl->registration_list, 2656c66ac9dbSNicholas Bellinger pr_reg_list) { 2657c66ac9dbSNicholas Bellinger /* 2658c66ac9dbSNicholas Bellinger * Do not establish a UNIT ATTENTION condition 2659c66ac9dbSNicholas Bellinger * for the calling I_T Nexus 2660c66ac9dbSNicholas Bellinger */ 2661c66ac9dbSNicholas Bellinger if (pr_reg_p == pr_reg) 2662c66ac9dbSNicholas Bellinger continue; 2663c66ac9dbSNicholas Bellinger 2664c51c8e7bSHannes Reinecke target_ua_allocate_lun(pr_reg_p->pr_reg_nacl, 2665c66ac9dbSNicholas Bellinger pr_reg_p->pr_res_mapped_lun, 2666c66ac9dbSNicholas Bellinger 0x2A, ASCQ_2AH_RESERVATIONS_RELEASED); 2667c66ac9dbSNicholas Bellinger } 2668c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 2669c66ac9dbSNicholas Bellinger 2670c66ac9dbSNicholas Bellinger write_aptpl: 2671459f213bSAndy Grover if (pr_tmpl->pr_aptpl_active) 2672459f213bSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, true); 2673459f213bSAndy Grover 2674de103c93SChristoph Hellwig out_put_pr_reg: 2675c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2676de103c93SChristoph Hellwig return ret; 2677c66ac9dbSNicholas Bellinger } 2678c66ac9dbSNicholas Bellinger 2679de103c93SChristoph Hellwig static sense_reason_t 2680de103c93SChristoph Hellwig core_scsi3_emulate_pro_clear(struct se_cmd *cmd, u64 res_key) 2681c66ac9dbSNicholas Bellinger { 2682c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 2683c66ac9dbSNicholas Bellinger struct se_node_acl *pr_reg_nacl; 2684e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 26850fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 2686c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder; 2687f2d30680SHannes Reinecke u64 pr_res_mapped_lun = 0; 2688c66ac9dbSNicholas Bellinger int calling_it_nexus = 0; 2689c66ac9dbSNicholas Bellinger /* 2690c66ac9dbSNicholas Bellinger * Locate the existing *pr_reg via struct se_node_acl pointers 2691c66ac9dbSNicholas Bellinger */ 26925951146dSAndy Grover pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, 2693c66ac9dbSNicholas Bellinger se_sess->se_node_acl, se_sess); 26946708bb27SAndy Grover if (!pr_reg_n) { 26956708bb27SAndy Grover pr_err("SPC-3 PR: Unable to locate" 2696c66ac9dbSNicholas Bellinger " PR_REGISTERED *pr_reg for CLEAR\n"); 2697de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2698c66ac9dbSNicholas Bellinger } 2699c66ac9dbSNicholas Bellinger /* 2700c66ac9dbSNicholas Bellinger * From spc4r17 section 5.7.11.6, Clearing: 2701c66ac9dbSNicholas Bellinger * 2702c66ac9dbSNicholas Bellinger * Any application client may release the persistent reservation and 2703c66ac9dbSNicholas Bellinger * remove all registrations from a device server by issuing a 2704c66ac9dbSNicholas Bellinger * PERSISTENT RESERVE OUT command with CLEAR service action through a 2705c66ac9dbSNicholas Bellinger * registered I_T nexus with the following parameter: 2706c66ac9dbSNicholas Bellinger * 2707c66ac9dbSNicholas Bellinger * a) RESERVATION KEY field set to the value of the reservation key 2708c66ac9dbSNicholas Bellinger * that is registered with the logical unit for the I_T nexus. 2709c66ac9dbSNicholas Bellinger */ 2710c66ac9dbSNicholas Bellinger if (res_key != pr_reg_n->pr_res_key) { 27116708bb27SAndy Grover pr_err("SPC-3 PR REGISTER: Received" 2712c66ac9dbSNicholas Bellinger " res_key: 0x%016Lx does not match" 2713c66ac9dbSNicholas Bellinger " existing SA REGISTER res_key:" 2714c66ac9dbSNicholas Bellinger " 0x%016Lx\n", res_key, pr_reg_n->pr_res_key); 2715c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 2716de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 2717c66ac9dbSNicholas Bellinger } 2718c66ac9dbSNicholas Bellinger /* 2719c66ac9dbSNicholas Bellinger * a) Release the persistent reservation, if any; 2720c66ac9dbSNicholas Bellinger */ 2721c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 2722c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 2723c66ac9dbSNicholas Bellinger if (pr_res_holder) { 2724c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 2725c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, pr_res_nacl, 27266c3c9baaSNicholas Bellinger pr_res_holder, 0, 0); 2727c66ac9dbSNicholas Bellinger } 2728c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2729c66ac9dbSNicholas Bellinger /* 2730c66ac9dbSNicholas Bellinger * b) Remove all registration(s) (see spc4r17 5.7.7); 2731c66ac9dbSNicholas Bellinger */ 2732c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 2733c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 2734c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 2735c66ac9dbSNicholas Bellinger 2736c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 2737c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 2738c66ac9dbSNicholas Bellinger pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; 2739c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, NULL, 2740c66ac9dbSNicholas Bellinger calling_it_nexus); 2741c66ac9dbSNicholas Bellinger /* 2742c66ac9dbSNicholas Bellinger * e) Establish a unit attention condition for the initiator 2743c66ac9dbSNicholas Bellinger * port associated with every registered I_T nexus other 2744c66ac9dbSNicholas Bellinger * than the I_T nexus on which the PERSISTENT RESERVE OUT 2745c66ac9dbSNicholas Bellinger * command with CLEAR service action was received, with the 2746c66ac9dbSNicholas Bellinger * additional sense code set to RESERVATIONS PREEMPTED. 2747c66ac9dbSNicholas Bellinger */ 27486708bb27SAndy Grover if (!calling_it_nexus) 2749c51c8e7bSHannes Reinecke target_ua_allocate_lun(pr_reg_nacl, pr_res_mapped_lun, 2750c66ac9dbSNicholas Bellinger 0x2A, ASCQ_2AH_RESERVATIONS_PREEMPTED); 2751c66ac9dbSNicholas Bellinger } 2752c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 2753c66ac9dbSNicholas Bellinger 27546708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: CLEAR complete\n", 2755e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name()); 2756c66ac9dbSNicholas Bellinger 2757459f213bSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, false); 2758c66ac9dbSNicholas Bellinger 2759c66ac9dbSNicholas Bellinger core_scsi3_pr_generation(dev); 2760c66ac9dbSNicholas Bellinger return 0; 2761c66ac9dbSNicholas Bellinger } 2762c66ac9dbSNicholas Bellinger 2763c66ac9dbSNicholas Bellinger /* 2764c66ac9dbSNicholas Bellinger * Called with struct se_device->dev_reservation_lock held. 2765c66ac9dbSNicholas Bellinger */ 2766c66ac9dbSNicholas Bellinger static void __core_scsi3_complete_pro_preempt( 2767c66ac9dbSNicholas Bellinger struct se_device *dev, 2768c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 2769c66ac9dbSNicholas Bellinger struct list_head *preempt_and_abort_list, 2770c66ac9dbSNicholas Bellinger int type, 2771c66ac9dbSNicholas Bellinger int scope, 277233ce6a87SAndy Grover enum preempt_type preempt_type) 2773c66ac9dbSNicholas Bellinger { 2774c66ac9dbSNicholas Bellinger struct se_node_acl *nacl = pr_reg->pr_reg_nacl; 27759ac8928eSChristoph Hellwig const struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; 2776c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 2777c66ac9dbSNicholas Bellinger 2778c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 2779d2843c17SAndy Grover core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 2780c66ac9dbSNicholas Bellinger /* 2781125d0119SHannes Reinecke * Do an implicit RELEASE of the existing reservation. 2782c66ac9dbSNicholas Bellinger */ 2783c66ac9dbSNicholas Bellinger if (dev->dev_pr_res_holder) 2784c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, nacl, 27856c3c9baaSNicholas Bellinger dev->dev_pr_res_holder, 0, 0); 2786c66ac9dbSNicholas Bellinger 2787c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = pr_reg; 2788c66ac9dbSNicholas Bellinger pr_reg->pr_res_holder = 1; 2789c66ac9dbSNicholas Bellinger pr_reg->pr_res_type = type; 2790c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope = scope; 2791c66ac9dbSNicholas Bellinger 27926708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: PREEMPT%s created new" 2793c66ac9dbSNicholas Bellinger " reservation holder TYPE: %s ALL_TG_PT: %d\n", 279433ce6a87SAndy Grover tfo->get_fabric_name(), (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : "", 2795c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(type), 2796c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); 27976708bb27SAndy Grover pr_debug("SPC-3 PR [%s] PREEMPT%s from Node: %s%s\n", 279833ce6a87SAndy Grover tfo->get_fabric_name(), (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : "", 2799d2843c17SAndy Grover nacl->initiatorname, i_buf); 2800c66ac9dbSNicholas Bellinger /* 2801c66ac9dbSNicholas Bellinger * For PREEMPT_AND_ABORT, add the preempting reservation's 2802c66ac9dbSNicholas Bellinger * struct t10_pr_registration to the list that will be compared 2803c66ac9dbSNicholas Bellinger * against received CDBs.. 2804c66ac9dbSNicholas Bellinger */ 2805c66ac9dbSNicholas Bellinger if (preempt_and_abort_list) 2806c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg->pr_reg_abort_list, 2807c66ac9dbSNicholas Bellinger preempt_and_abort_list); 2808c66ac9dbSNicholas Bellinger } 2809c66ac9dbSNicholas Bellinger 2810c66ac9dbSNicholas Bellinger static void core_scsi3_release_preempt_and_abort( 2811c66ac9dbSNicholas Bellinger struct list_head *preempt_and_abort_list, 2812c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg_holder) 2813c66ac9dbSNicholas Bellinger { 2814c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp; 2815c66ac9dbSNicholas Bellinger 2816c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, preempt_and_abort_list, 2817c66ac9dbSNicholas Bellinger pr_reg_abort_list) { 2818c66ac9dbSNicholas Bellinger 2819c66ac9dbSNicholas Bellinger list_del(&pr_reg->pr_reg_abort_list); 2820c66ac9dbSNicholas Bellinger if (pr_reg_holder == pr_reg) 2821c66ac9dbSNicholas Bellinger continue; 2822c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_holder) { 28236708bb27SAndy Grover pr_warn("pr_reg->pr_res_holder still set\n"); 2824c66ac9dbSNicholas Bellinger continue; 2825c66ac9dbSNicholas Bellinger } 2826c66ac9dbSNicholas Bellinger 2827c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve = NULL; 2828c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = NULL; 2829c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 2830c66ac9dbSNicholas Bellinger } 2831c66ac9dbSNicholas Bellinger } 2832c66ac9dbSNicholas Bellinger 2833de103c93SChristoph Hellwig static sense_reason_t 2834de103c93SChristoph Hellwig core_scsi3_pro_preempt(struct se_cmd *cmd, int type, int scope, u64 res_key, 283533ce6a87SAndy Grover u64 sa_res_key, enum preempt_type preempt_type) 2836c66ac9dbSNicholas Bellinger { 28375951146dSAndy Grover struct se_device *dev = cmd->se_dev; 2838c66ac9dbSNicholas Bellinger struct se_node_acl *pr_reg_nacl; 2839e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 2840d0f474e5SRoland Dreier LIST_HEAD(preempt_and_abort_list); 2841c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder; 28420fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 2843f2d30680SHannes Reinecke u64 pr_res_mapped_lun = 0; 2844b6932ee3SSteven Allen int all_reg = 0, calling_it_nexus = 0; 2845b6932ee3SSteven Allen bool sa_res_key_unmatched = sa_res_key != 0; 2846de103c93SChristoph Hellwig int prh_type = 0, prh_scope = 0; 2847c66ac9dbSNicholas Bellinger 2848de103c93SChristoph Hellwig if (!se_sess) 2849de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2850c66ac9dbSNicholas Bellinger 28515951146dSAndy Grover pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, 2852c66ac9dbSNicholas Bellinger se_sess); 28536708bb27SAndy Grover if (!pr_reg_n) { 28546708bb27SAndy Grover pr_err("SPC-3 PR: Unable to locate" 2855c66ac9dbSNicholas Bellinger " PR_REGISTERED *pr_reg for PREEMPT%s\n", 285633ce6a87SAndy Grover (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : ""); 2857de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 2858c66ac9dbSNicholas Bellinger } 2859c66ac9dbSNicholas Bellinger if (pr_reg_n->pr_res_key != res_key) { 2860c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 2861de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 2862c66ac9dbSNicholas Bellinger } 2863c66ac9dbSNicholas Bellinger if (scope != PR_SCOPE_LU_SCOPE) { 28646708bb27SAndy Grover pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope); 2865c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 2866de103c93SChristoph Hellwig return TCM_INVALID_PARAMETER_LIST; 2867c66ac9dbSNicholas Bellinger } 2868c66ac9dbSNicholas Bellinger 2869c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 2870c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 2871c66ac9dbSNicholas Bellinger if (pr_res_holder && 2872c66ac9dbSNicholas Bellinger ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 2873c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG))) 2874c66ac9dbSNicholas Bellinger all_reg = 1; 2875c66ac9dbSNicholas Bellinger 28766708bb27SAndy Grover if (!all_reg && !sa_res_key) { 2877c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2878c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 2879de103c93SChristoph Hellwig return TCM_INVALID_PARAMETER_LIST; 2880c66ac9dbSNicholas Bellinger } 2881c66ac9dbSNicholas Bellinger /* 2882c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.11.4.4 Removing Registrations: 2883c66ac9dbSNicholas Bellinger * 2884c66ac9dbSNicholas Bellinger * If the SERVICE ACTION RESERVATION KEY field does not identify a 2885c66ac9dbSNicholas Bellinger * persistent reservation holder or there is no persistent reservation 2886c66ac9dbSNicholas Bellinger * holder (i.e., there is no persistent reservation), then the device 2887c66ac9dbSNicholas Bellinger * server shall perform a preempt by doing the following in an 2888c66ac9dbSNicholas Bellinger * uninterrupted series of actions. (See below..) 2889c66ac9dbSNicholas Bellinger */ 28906708bb27SAndy Grover if (!pr_res_holder || (pr_res_holder->pr_res_key != sa_res_key)) { 2891c66ac9dbSNicholas Bellinger /* 2892c66ac9dbSNicholas Bellinger * No existing or SA Reservation Key matching reservations.. 2893c66ac9dbSNicholas Bellinger * 2894c66ac9dbSNicholas Bellinger * PROUT SA PREEMPT with All Registrant type reservations are 2895c66ac9dbSNicholas Bellinger * allowed to be processed without a matching SA Reservation Key 2896c66ac9dbSNicholas Bellinger */ 2897c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 2898c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 2899c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 2900c66ac9dbSNicholas Bellinger /* 2901c66ac9dbSNicholas Bellinger * Removing of registrations in non all registrants 2902c66ac9dbSNicholas Bellinger * type reservations without a matching SA reservation 2903c66ac9dbSNicholas Bellinger * key. 2904c66ac9dbSNicholas Bellinger * 2905c66ac9dbSNicholas Bellinger * a) Remove the registrations for all I_T nexuses 2906c66ac9dbSNicholas Bellinger * specified by the SERVICE ACTION RESERVATION KEY 2907c66ac9dbSNicholas Bellinger * field; 2908c66ac9dbSNicholas Bellinger * b) Ignore the contents of the SCOPE and TYPE fields; 2909c66ac9dbSNicholas Bellinger * c) Process tasks as defined in 5.7.1; and 2910c66ac9dbSNicholas Bellinger * d) Establish a unit attention condition for the 2911c66ac9dbSNicholas Bellinger * initiator port associated with every I_T nexus 2912c66ac9dbSNicholas Bellinger * that lost its registration other than the I_T 2913c66ac9dbSNicholas Bellinger * nexus on which the PERSISTENT RESERVE OUT command 2914c66ac9dbSNicholas Bellinger * was received, with the additional sense code set 2915c66ac9dbSNicholas Bellinger * to REGISTRATIONS PREEMPTED. 2916c66ac9dbSNicholas Bellinger */ 29176708bb27SAndy Grover if (!all_reg) { 2918c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_key != sa_res_key) 2919c66ac9dbSNicholas Bellinger continue; 2920b6932ee3SSteven Allen sa_res_key_unmatched = false; 2921c66ac9dbSNicholas Bellinger 2922c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 2923c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 2924c66ac9dbSNicholas Bellinger pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; 2925c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, 292633ce6a87SAndy Grover (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : 2927c66ac9dbSNicholas Bellinger NULL, calling_it_nexus); 2928c66ac9dbSNicholas Bellinger } else { 2929c66ac9dbSNicholas Bellinger /* 2930c66ac9dbSNicholas Bellinger * Case for any existing all registrants type 2931c66ac9dbSNicholas Bellinger * reservation, follow logic in spc4r17 section 2932c66ac9dbSNicholas Bellinger * 5.7.11.4 Preempting, Table 52 and Figure 7. 2933c66ac9dbSNicholas Bellinger * 2934c66ac9dbSNicholas Bellinger * For a ZERO SA Reservation key, release 2935125d0119SHannes Reinecke * all other registrations and do an implicit 2936c66ac9dbSNicholas Bellinger * release of active persistent reservation. 2937c66ac9dbSNicholas Bellinger * 2938c66ac9dbSNicholas Bellinger * For a non-ZERO SA Reservation key, only 2939c66ac9dbSNicholas Bellinger * release the matching reservation key from 2940c66ac9dbSNicholas Bellinger * registrations. 2941c66ac9dbSNicholas Bellinger */ 2942c66ac9dbSNicholas Bellinger if ((sa_res_key) && 2943c66ac9dbSNicholas Bellinger (pr_reg->pr_res_key != sa_res_key)) 2944c66ac9dbSNicholas Bellinger continue; 2945b6932ee3SSteven Allen sa_res_key_unmatched = false; 2946c66ac9dbSNicholas Bellinger 2947c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 2948c66ac9dbSNicholas Bellinger if (calling_it_nexus) 2949c66ac9dbSNicholas Bellinger continue; 2950c66ac9dbSNicholas Bellinger 2951c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 2952c66ac9dbSNicholas Bellinger pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; 2953c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, 295433ce6a87SAndy Grover (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : 2955c66ac9dbSNicholas Bellinger NULL, 0); 2956c66ac9dbSNicholas Bellinger } 29576708bb27SAndy Grover if (!calling_it_nexus) 2958c51c8e7bSHannes Reinecke target_ua_allocate_lun(pr_reg_nacl, 2959c66ac9dbSNicholas Bellinger pr_res_mapped_lun, 0x2A, 29609e08e34eSMarco Sanvido ASCQ_2AH_REGISTRATIONS_PREEMPTED); 2961c66ac9dbSNicholas Bellinger } 2962c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 2963c66ac9dbSNicholas Bellinger /* 2964c66ac9dbSNicholas Bellinger * If a PERSISTENT RESERVE OUT with a PREEMPT service action or 2965c66ac9dbSNicholas Bellinger * a PREEMPT AND ABORT service action sets the SERVICE ACTION 2966c66ac9dbSNicholas Bellinger * RESERVATION KEY field to a value that does not match any 2967c66ac9dbSNicholas Bellinger * registered reservation key, then the device server shall 2968c66ac9dbSNicholas Bellinger * complete the command with RESERVATION CONFLICT status. 2969c66ac9dbSNicholas Bellinger */ 2970b6932ee3SSteven Allen if (sa_res_key_unmatched) { 2971c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2972c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 2973de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 2974c66ac9dbSNicholas Bellinger } 2975c66ac9dbSNicholas Bellinger /* 2976c66ac9dbSNicholas Bellinger * For an existing all registrants type reservation 2977c66ac9dbSNicholas Bellinger * with a zero SA rservation key, preempt the existing 2978c66ac9dbSNicholas Bellinger * reservation with the new PR type and scope. 2979c66ac9dbSNicholas Bellinger */ 2980c66ac9dbSNicholas Bellinger if (pr_res_holder && all_reg && !(sa_res_key)) { 2981c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_preempt(dev, pr_reg_n, 298233ce6a87SAndy Grover (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : NULL, 298333ce6a87SAndy Grover type, scope, preempt_type); 2984c66ac9dbSNicholas Bellinger 298533ce6a87SAndy Grover if (preempt_type == PREEMPT_AND_ABORT) 2986c66ac9dbSNicholas Bellinger core_scsi3_release_preempt_and_abort( 2987c66ac9dbSNicholas Bellinger &preempt_and_abort_list, pr_reg_n); 2988c66ac9dbSNicholas Bellinger } 2989c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2990c66ac9dbSNicholas Bellinger 2991459f213bSAndy Grover if (pr_tmpl->pr_aptpl_active) 2992459f213bSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, true); 2993c66ac9dbSNicholas Bellinger 2994c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 29955951146dSAndy Grover core_scsi3_pr_generation(cmd->se_dev); 2996c66ac9dbSNicholas Bellinger return 0; 2997c66ac9dbSNicholas Bellinger } 2998c66ac9dbSNicholas Bellinger /* 2999c66ac9dbSNicholas Bellinger * The PREEMPTing SA reservation key matches that of the 3000c66ac9dbSNicholas Bellinger * existing persistent reservation, first, we check if 3001c66ac9dbSNicholas Bellinger * we are preempting our own reservation. 3002c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.11.4.3 Preempting 3003c66ac9dbSNicholas Bellinger * persistent reservations and registration handling 3004c66ac9dbSNicholas Bellinger * 3005c66ac9dbSNicholas Bellinger * If an all registrants persistent reservation is not 3006c66ac9dbSNicholas Bellinger * present, it is not an error for the persistent 3007c66ac9dbSNicholas Bellinger * reservation holder to preempt itself (i.e., a 3008c66ac9dbSNicholas Bellinger * PERSISTENT RESERVE OUT with a PREEMPT service action 3009c66ac9dbSNicholas Bellinger * or a PREEMPT AND ABORT service action with the 3010c66ac9dbSNicholas Bellinger * SERVICE ACTION RESERVATION KEY value equal to the 3011c66ac9dbSNicholas Bellinger * persistent reservation holder's reservation key that 3012c66ac9dbSNicholas Bellinger * is received from the persistent reservation holder). 3013c66ac9dbSNicholas Bellinger * In that case, the device server shall establish the 3014c66ac9dbSNicholas Bellinger * new persistent reservation and maintain the 3015c66ac9dbSNicholas Bellinger * registration. 3016c66ac9dbSNicholas Bellinger */ 3017c66ac9dbSNicholas Bellinger prh_type = pr_res_holder->pr_res_type; 3018c66ac9dbSNicholas Bellinger prh_scope = pr_res_holder->pr_res_scope; 3019c66ac9dbSNicholas Bellinger /* 3020c66ac9dbSNicholas Bellinger * If the SERVICE ACTION RESERVATION KEY field identifies a 3021c66ac9dbSNicholas Bellinger * persistent reservation holder (see 5.7.10), the device 3022c66ac9dbSNicholas Bellinger * server shall perform a preempt by doing the following as 3023c66ac9dbSNicholas Bellinger * an uninterrupted series of actions: 3024c66ac9dbSNicholas Bellinger * 3025c66ac9dbSNicholas Bellinger * a) Release the persistent reservation for the holder 3026c66ac9dbSNicholas Bellinger * identified by the SERVICE ACTION RESERVATION KEY field; 3027c66ac9dbSNicholas Bellinger */ 3028c66ac9dbSNicholas Bellinger if (pr_reg_n != pr_res_holder) 3029c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, 3030c66ac9dbSNicholas Bellinger pr_res_holder->pr_reg_nacl, 30316c3c9baaSNicholas Bellinger dev->dev_pr_res_holder, 0, 0); 3032c66ac9dbSNicholas Bellinger /* 3033c66ac9dbSNicholas Bellinger * b) Remove the registrations for all I_T nexuses identified 3034c66ac9dbSNicholas Bellinger * by the SERVICE ACTION RESERVATION KEY field, except the 3035c66ac9dbSNicholas Bellinger * I_T nexus that is being used for the PERSISTENT RESERVE 3036c66ac9dbSNicholas Bellinger * OUT command. If an all registrants persistent reservation 3037c66ac9dbSNicholas Bellinger * is present and the SERVICE ACTION RESERVATION KEY field 3038c66ac9dbSNicholas Bellinger * is set to zero, then all registrations shall be removed 3039c66ac9dbSNicholas Bellinger * except for that of the I_T nexus that is being used for 3040c66ac9dbSNicholas Bellinger * the PERSISTENT RESERVE OUT command; 3041c66ac9dbSNicholas Bellinger */ 3042c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 3043c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 3044c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 3045c66ac9dbSNicholas Bellinger 3046c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 3047c66ac9dbSNicholas Bellinger if (calling_it_nexus) 3048c66ac9dbSNicholas Bellinger continue; 3049c66ac9dbSNicholas Bellinger 3050c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_key != sa_res_key) 3051c66ac9dbSNicholas Bellinger continue; 3052c66ac9dbSNicholas Bellinger 3053c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 3054c66ac9dbSNicholas Bellinger pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; 3055c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, 305633ce6a87SAndy Grover (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : NULL, 3057c66ac9dbSNicholas Bellinger calling_it_nexus); 3058c66ac9dbSNicholas Bellinger /* 3059c66ac9dbSNicholas Bellinger * e) Establish a unit attention condition for the initiator 3060c66ac9dbSNicholas Bellinger * port associated with every I_T nexus that lost its 3061c66ac9dbSNicholas Bellinger * persistent reservation and/or registration, with the 3062c66ac9dbSNicholas Bellinger * additional sense code set to REGISTRATIONS PREEMPTED; 3063c66ac9dbSNicholas Bellinger */ 3064c51c8e7bSHannes Reinecke target_ua_allocate_lun(pr_reg_nacl, pr_res_mapped_lun, 0x2A, 30659e08e34eSMarco Sanvido ASCQ_2AH_REGISTRATIONS_PREEMPTED); 3066c66ac9dbSNicholas Bellinger } 3067c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 3068c66ac9dbSNicholas Bellinger /* 3069c66ac9dbSNicholas Bellinger * c) Establish a persistent reservation for the preempting 3070c66ac9dbSNicholas Bellinger * I_T nexus using the contents of the SCOPE and TYPE fields; 3071c66ac9dbSNicholas Bellinger */ 3072c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_preempt(dev, pr_reg_n, 307333ce6a87SAndy Grover (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : NULL, 307433ce6a87SAndy Grover type, scope, preempt_type); 3075c66ac9dbSNicholas Bellinger /* 3076c66ac9dbSNicholas Bellinger * d) Process tasks as defined in 5.7.1; 3077c66ac9dbSNicholas Bellinger * e) See above.. 3078c66ac9dbSNicholas Bellinger * f) If the type or scope has changed, then for every I_T nexus 3079c66ac9dbSNicholas Bellinger * whose reservation key was not removed, except for the I_T 3080c66ac9dbSNicholas Bellinger * nexus on which the PERSISTENT RESERVE OUT command was 3081c66ac9dbSNicholas Bellinger * received, the device server shall establish a unit 3082c66ac9dbSNicholas Bellinger * attention condition for the initiator port associated with 3083c66ac9dbSNicholas Bellinger * that I_T nexus, with the additional sense code set to 3084c66ac9dbSNicholas Bellinger * RESERVATIONS RELEASED. If the type or scope have not 3085c66ac9dbSNicholas Bellinger * changed, then no unit attention condition(s) shall be 3086c66ac9dbSNicholas Bellinger * established for this reason. 3087c66ac9dbSNicholas Bellinger */ 3088c66ac9dbSNicholas Bellinger if ((prh_type != type) || (prh_scope != scope)) { 3089c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 3090c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 3091c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 3092c66ac9dbSNicholas Bellinger 3093c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 3094c66ac9dbSNicholas Bellinger if (calling_it_nexus) 3095c66ac9dbSNicholas Bellinger continue; 3096c66ac9dbSNicholas Bellinger 3097c51c8e7bSHannes Reinecke target_ua_allocate_lun(pr_reg->pr_reg_nacl, 3098c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun, 0x2A, 3099c66ac9dbSNicholas Bellinger ASCQ_2AH_RESERVATIONS_RELEASED); 3100c66ac9dbSNicholas Bellinger } 3101c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 3102c66ac9dbSNicholas Bellinger } 3103c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3104c66ac9dbSNicholas Bellinger /* 3105c66ac9dbSNicholas Bellinger * Call LUN_RESET logic upon list of struct t10_pr_registration, 3106c66ac9dbSNicholas Bellinger * All received CDBs for the matching existing reservation and 3107c66ac9dbSNicholas Bellinger * registrations undergo ABORT_TASK logic. 3108c66ac9dbSNicholas Bellinger * 3109c66ac9dbSNicholas Bellinger * From there, core_scsi3_release_preempt_and_abort() will 3110c66ac9dbSNicholas Bellinger * release every registration in the list (which have already 3111c66ac9dbSNicholas Bellinger * been removed from the primary pr_reg list), except the 3112c66ac9dbSNicholas Bellinger * new persistent reservation holder, the calling Initiator Port. 3113c66ac9dbSNicholas Bellinger */ 311433ce6a87SAndy Grover if (preempt_type == PREEMPT_AND_ABORT) { 3115c66ac9dbSNicholas Bellinger core_tmr_lun_reset(dev, NULL, &preempt_and_abort_list, cmd); 3116c66ac9dbSNicholas Bellinger core_scsi3_release_preempt_and_abort(&preempt_and_abort_list, 3117c66ac9dbSNicholas Bellinger pr_reg_n); 3118c66ac9dbSNicholas Bellinger } 3119c66ac9dbSNicholas Bellinger 3120459f213bSAndy Grover if (pr_tmpl->pr_aptpl_active) 3121459f213bSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, true); 3122c66ac9dbSNicholas Bellinger 3123c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 31245951146dSAndy Grover core_scsi3_pr_generation(cmd->se_dev); 3125c66ac9dbSNicholas Bellinger return 0; 3126c66ac9dbSNicholas Bellinger } 3127c66ac9dbSNicholas Bellinger 3128de103c93SChristoph Hellwig static sense_reason_t 3129de103c93SChristoph Hellwig core_scsi3_emulate_pro_preempt(struct se_cmd *cmd, int type, int scope, 313033ce6a87SAndy Grover u64 res_key, u64 sa_res_key, enum preempt_type preempt_type) 3131c66ac9dbSNicholas Bellinger { 3132c66ac9dbSNicholas Bellinger switch (type) { 3133c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE: 3134c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS: 3135c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: 3136c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: 3137c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: 3138c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: 3139de103c93SChristoph Hellwig return core_scsi3_pro_preempt(cmd, type, scope, res_key, 314033ce6a87SAndy Grover sa_res_key, preempt_type); 3141c66ac9dbSNicholas Bellinger default: 31426708bb27SAndy Grover pr_err("SPC-3 PR: Unknown Service Action PREEMPT%s" 314333ce6a87SAndy Grover " Type: 0x%02x\n", (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : "", type); 3144de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 3145c66ac9dbSNicholas Bellinger } 3146c66ac9dbSNicholas Bellinger } 3147c66ac9dbSNicholas Bellinger 3148c66ac9dbSNicholas Bellinger 3149de103c93SChristoph Hellwig static sense_reason_t 3150de103c93SChristoph Hellwig core_scsi3_emulate_pro_register_and_move(struct se_cmd *cmd, u64 res_key, 3151de103c93SChristoph Hellwig u64 sa_res_key, int aptpl, int unreg) 3152c66ac9dbSNicholas Bellinger { 3153e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 31545951146dSAndy Grover struct se_device *dev = cmd->se_dev; 315528168905SJörn Engel struct se_dev_entry *dest_se_deve = NULL; 3156adf653f9SChristoph Hellwig struct se_lun *se_lun = cmd->se_lun, *tmp_lun; 3157c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl, *pr_reg_nacl, *dest_node_acl = NULL; 3158c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg, *dest_se_tpg = NULL; 31599ac8928eSChristoph Hellwig const struct target_core_fabric_ops *dest_tf_ops = NULL, *tf_ops; 3160c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_res_holder, *dest_pr_reg; 31610fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 316205d1c7c0SAndy Grover unsigned char *buf; 31632650d71eSChristoph Hellwig const unsigned char *initiator_str; 316413ba564cSJulia Lawall char *iport_ptr = NULL, i_buf[PR_REG_ISID_ID_LEN]; 3165c66ac9dbSNicholas Bellinger u32 tid_len, tmp_tid_len; 3166d2843c17SAndy Grover int new_reg = 0, type, scope, matching_iname; 3167de103c93SChristoph Hellwig sense_reason_t ret; 3168c66ac9dbSNicholas Bellinger unsigned short rtpi; 3169c66ac9dbSNicholas Bellinger unsigned char proto_ident; 3170c66ac9dbSNicholas Bellinger 31716708bb27SAndy Grover if (!se_sess || !se_lun) { 31726708bb27SAndy Grover pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); 3173de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3174c66ac9dbSNicholas Bellinger } 3175de103c93SChristoph Hellwig 3176c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 3177c66ac9dbSNicholas Bellinger se_tpg = se_sess->se_tpg; 3178e3d6f909SAndy Grover tf_ops = se_tpg->se_tpg_tfo; 3179c66ac9dbSNicholas Bellinger /* 3180c66ac9dbSNicholas Bellinger * Follow logic from spc4r17 Section 5.7.8, Table 50 -- 3181c66ac9dbSNicholas Bellinger * Register behaviors for a REGISTER AND MOVE service action 3182c66ac9dbSNicholas Bellinger * 3183c66ac9dbSNicholas Bellinger * Locate the existing *pr_reg via struct se_node_acl pointers 3184c66ac9dbSNicholas Bellinger */ 31855951146dSAndy Grover pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, 3186c66ac9dbSNicholas Bellinger se_sess); 31876708bb27SAndy Grover if (!pr_reg) { 31886708bb27SAndy Grover pr_err("SPC-3 PR: Unable to locate PR_REGISTERED" 3189c66ac9dbSNicholas Bellinger " *pr_reg for REGISTER_AND_MOVE\n"); 3190de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3191c66ac9dbSNicholas Bellinger } 3192c66ac9dbSNicholas Bellinger /* 3193c66ac9dbSNicholas Bellinger * The provided reservation key much match the existing reservation key 3194c66ac9dbSNicholas Bellinger * provided during this initiator's I_T nexus registration. 3195c66ac9dbSNicholas Bellinger */ 3196c66ac9dbSNicholas Bellinger if (res_key != pr_reg->pr_res_key) { 31976708bb27SAndy Grover pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received" 3198c66ac9dbSNicholas Bellinger " res_key: 0x%016Lx does not match existing SA REGISTER" 3199c66ac9dbSNicholas Bellinger " res_key: 0x%016Lx\n", res_key, pr_reg->pr_res_key); 3200de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 3201de103c93SChristoph Hellwig goto out_put_pr_reg; 3202c66ac9dbSNicholas Bellinger } 3203c66ac9dbSNicholas Bellinger /* 3204c66ac9dbSNicholas Bellinger * The service active reservation key needs to be non zero 3205c66ac9dbSNicholas Bellinger */ 32066708bb27SAndy Grover if (!sa_res_key) { 32076708bb27SAndy Grover pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received zero" 3208c66ac9dbSNicholas Bellinger " sa_res_key\n"); 3209de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3210de103c93SChristoph Hellwig goto out_put_pr_reg; 3211c66ac9dbSNicholas Bellinger } 321205d1c7c0SAndy Grover 3213c66ac9dbSNicholas Bellinger /* 3214c66ac9dbSNicholas Bellinger * Determine the Relative Target Port Identifier where the reservation 3215c66ac9dbSNicholas Bellinger * will be moved to for the TransportID containing SCSI initiator WWN 3216c66ac9dbSNicholas Bellinger * information. 3217c66ac9dbSNicholas Bellinger */ 32184949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3219de103c93SChristoph Hellwig if (!buf) { 322079dd6f2fStangwenji ret = TCM_INSUFFICIENT_REGISTRATION_RESOURCES; 3221de103c93SChristoph Hellwig goto out_put_pr_reg; 3222de103c93SChristoph Hellwig } 3223de103c93SChristoph Hellwig 3224a85d667eSBart Van Assche rtpi = get_unaligned_be16(&buf[18]); 3225a85d667eSBart Van Assche tid_len = get_unaligned_be32(&buf[20]); 32264949314cSAndy Grover transport_kunmap_data_sg(cmd); 322705d1c7c0SAndy Grover buf = NULL; 3228c66ac9dbSNicholas Bellinger 3229c66ac9dbSNicholas Bellinger if ((tid_len + 24) != cmd->data_length) { 32306708bb27SAndy Grover pr_err("SPC-3 PR: Illegal tid_len: %u + 24 byte header" 3231c66ac9dbSNicholas Bellinger " does not equal CDB data_length: %u\n", tid_len, 3232c66ac9dbSNicholas Bellinger cmd->data_length); 3233de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3234de103c93SChristoph Hellwig goto out_put_pr_reg; 3235c66ac9dbSNicholas Bellinger } 3236c66ac9dbSNicholas Bellinger 3237c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 3238adf653f9SChristoph Hellwig list_for_each_entry(tmp_lun, &dev->dev_sep_list, lun_dev_link) { 3239adf653f9SChristoph Hellwig if (tmp_lun->lun_rtpi != rtpi) 3240c66ac9dbSNicholas Bellinger continue; 3241adf653f9SChristoph Hellwig dest_se_tpg = tmp_lun->lun_tpg; 3242e3d6f909SAndy Grover dest_tf_ops = dest_se_tpg->se_tpg_tfo; 32436708bb27SAndy Grover if (!dest_tf_ops) 3244c66ac9dbSNicholas Bellinger continue; 3245c66ac9dbSNicholas Bellinger 324633940d09SJoern Engel atomic_inc_mb(&dest_se_tpg->tpg_pr_ref_count); 3247c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 3248c66ac9dbSNicholas Bellinger 3249de103c93SChristoph Hellwig if (core_scsi3_tpg_depend_item(dest_se_tpg)) { 32506708bb27SAndy Grover pr_err("core_scsi3_tpg_depend_item() failed" 3251c66ac9dbSNicholas Bellinger " for dest_se_tpg\n"); 325233940d09SJoern Engel atomic_dec_mb(&dest_se_tpg->tpg_pr_ref_count); 3253de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3254de103c93SChristoph Hellwig goto out_put_pr_reg; 3255c66ac9dbSNicholas Bellinger } 3256c66ac9dbSNicholas Bellinger 3257c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 3258c66ac9dbSNicholas Bellinger break; 3259c66ac9dbSNicholas Bellinger } 3260c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 3261c66ac9dbSNicholas Bellinger 32626708bb27SAndy Grover if (!dest_se_tpg || !dest_tf_ops) { 32636708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate" 3264c66ac9dbSNicholas Bellinger " fabric ops from Relative Target Port Identifier:" 3265c66ac9dbSNicholas Bellinger " %hu\n", rtpi); 3266de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3267de103c93SChristoph Hellwig goto out_put_pr_reg; 3268c66ac9dbSNicholas Bellinger } 326905d1c7c0SAndy Grover 32704949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3271de103c93SChristoph Hellwig if (!buf) { 327279dd6f2fStangwenji ret = TCM_INSUFFICIENT_REGISTRATION_RESOURCES; 3273de103c93SChristoph Hellwig goto out_put_pr_reg; 3274de103c93SChristoph Hellwig } 3275c66ac9dbSNicholas Bellinger proto_ident = (buf[24] & 0x0f); 32768b1e1244SAndy Grover 32776708bb27SAndy Grover pr_debug("SPC-3 PR REGISTER_AND_MOVE: Extracted Protocol Identifier:" 3278c66ac9dbSNicholas Bellinger " 0x%02x\n", proto_ident); 32798b1e1244SAndy Grover 32802aeeafaeSChristoph Hellwig if (proto_ident != dest_se_tpg->proto_id) { 32816708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: Received" 3282c66ac9dbSNicholas Bellinger " proto_ident: 0x%02x does not match ident: 0x%02x" 3283c66ac9dbSNicholas Bellinger " from fabric: %s\n", proto_ident, 32842aeeafaeSChristoph Hellwig dest_se_tpg->proto_id, 3285c66ac9dbSNicholas Bellinger dest_tf_ops->get_fabric_name()); 3286de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3287c66ac9dbSNicholas Bellinger goto out; 3288c66ac9dbSNicholas Bellinger } 32892650d71eSChristoph Hellwig initiator_str = target_parse_pr_out_transport_id(dest_se_tpg, 3290094bb5d7SRasmus Villemoes &buf[24], &tmp_tid_len, &iport_ptr); 32916708bb27SAndy Grover if (!initiator_str) { 32926708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate" 3293c66ac9dbSNicholas Bellinger " initiator_str from Transport ID\n"); 3294de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3295c66ac9dbSNicholas Bellinger goto out; 3296c66ac9dbSNicholas Bellinger } 3297c66ac9dbSNicholas Bellinger 32984949314cSAndy Grover transport_kunmap_data_sg(cmd); 329905d1c7c0SAndy Grover buf = NULL; 330005d1c7c0SAndy Grover 33016708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Extracted initiator %s identifier: %s" 3302c66ac9dbSNicholas Bellinger " %s\n", dest_tf_ops->get_fabric_name(), (iport_ptr != NULL) ? 3303c66ac9dbSNicholas Bellinger "port" : "device", initiator_str, (iport_ptr != NULL) ? 3304c66ac9dbSNicholas Bellinger iport_ptr : ""); 3305c66ac9dbSNicholas Bellinger /* 3306c66ac9dbSNicholas Bellinger * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service 3307c66ac9dbSNicholas Bellinger * action specifies a TransportID that is the same as the initiator port 3308c66ac9dbSNicholas Bellinger * of the I_T nexus for the command received, then the command shall 3309c66ac9dbSNicholas Bellinger * be terminated with CHECK CONDITION status, with the sense key set to 3310c66ac9dbSNicholas Bellinger * ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD 3311c66ac9dbSNicholas Bellinger * IN PARAMETER LIST. 3312c66ac9dbSNicholas Bellinger */ 3313c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 3314c66ac9dbSNicholas Bellinger matching_iname = (!strcmp(initiator_str, 3315c66ac9dbSNicholas Bellinger pr_reg_nacl->initiatorname)) ? 1 : 0; 33166708bb27SAndy Grover if (!matching_iname) 3317c66ac9dbSNicholas Bellinger goto after_iport_check; 3318c66ac9dbSNicholas Bellinger 33196708bb27SAndy Grover if (!iport_ptr || !pr_reg->isid_present_at_reg) { 33206708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s" 3321c66ac9dbSNicholas Bellinger " matches: %s on received I_T Nexus\n", initiator_str, 3322c66ac9dbSNicholas Bellinger pr_reg_nacl->initiatorname); 3323de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3324c66ac9dbSNicholas Bellinger goto out; 3325c66ac9dbSNicholas Bellinger } 33266708bb27SAndy Grover if (!strcmp(iport_ptr, pr_reg->pr_reg_isid)) { 33276708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s %s" 3328c66ac9dbSNicholas Bellinger " matches: %s %s on received I_T Nexus\n", 3329c66ac9dbSNicholas Bellinger initiator_str, iport_ptr, pr_reg_nacl->initiatorname, 3330c66ac9dbSNicholas Bellinger pr_reg->pr_reg_isid); 3331de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3332c66ac9dbSNicholas Bellinger goto out; 3333c66ac9dbSNicholas Bellinger } 3334c66ac9dbSNicholas Bellinger after_iport_check: 3335c66ac9dbSNicholas Bellinger /* 3336c66ac9dbSNicholas Bellinger * Locate the destination struct se_node_acl from the received Transport ID 3337c66ac9dbSNicholas Bellinger */ 3338403edd78SNicholas Bellinger mutex_lock(&dest_se_tpg->acl_node_mutex); 3339c66ac9dbSNicholas Bellinger dest_node_acl = __core_tpg_get_initiator_node_acl(dest_se_tpg, 3340c66ac9dbSNicholas Bellinger initiator_str); 334133940d09SJoern Engel if (dest_node_acl) 334233940d09SJoern Engel atomic_inc_mb(&dest_node_acl->acl_pr_ref_count); 3343403edd78SNicholas Bellinger mutex_unlock(&dest_se_tpg->acl_node_mutex); 3344c66ac9dbSNicholas Bellinger 33456708bb27SAndy Grover if (!dest_node_acl) { 33466708bb27SAndy Grover pr_err("Unable to locate %s dest_node_acl for" 3347c66ac9dbSNicholas Bellinger " TransportID%s\n", dest_tf_ops->get_fabric_name(), 3348c66ac9dbSNicholas Bellinger initiator_str); 3349de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3350c66ac9dbSNicholas Bellinger goto out; 3351c66ac9dbSNicholas Bellinger } 3352de103c93SChristoph Hellwig 3353de103c93SChristoph Hellwig if (core_scsi3_nodeacl_depend_item(dest_node_acl)) { 33546708bb27SAndy Grover pr_err("core_scsi3_nodeacl_depend_item() for" 3355c66ac9dbSNicholas Bellinger " dest_node_acl\n"); 335633940d09SJoern Engel atomic_dec_mb(&dest_node_acl->acl_pr_ref_count); 3357c66ac9dbSNicholas Bellinger dest_node_acl = NULL; 3358de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3359c66ac9dbSNicholas Bellinger goto out; 3360c66ac9dbSNicholas Bellinger } 33618b1e1244SAndy Grover 33626708bb27SAndy Grover pr_debug("SPC-3 PR REGISTER_AND_MOVE: Found %s dest_node_acl:" 3363c66ac9dbSNicholas Bellinger " %s from TransportID\n", dest_tf_ops->get_fabric_name(), 3364c66ac9dbSNicholas Bellinger dest_node_acl->initiatorname); 33658b1e1244SAndy Grover 3366c66ac9dbSNicholas Bellinger /* 3367c66ac9dbSNicholas Bellinger * Locate the struct se_dev_entry pointer for the matching RELATIVE TARGET 3368c66ac9dbSNicholas Bellinger * PORT IDENTIFIER. 3369c66ac9dbSNicholas Bellinger */ 3370c66ac9dbSNicholas Bellinger dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, rtpi); 33716708bb27SAndy Grover if (!dest_se_deve) { 33726708bb27SAndy Grover pr_err("Unable to locate %s dest_se_deve from RTPI:" 3373c66ac9dbSNicholas Bellinger " %hu\n", dest_tf_ops->get_fabric_name(), rtpi); 3374de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3375c66ac9dbSNicholas Bellinger goto out; 3376c66ac9dbSNicholas Bellinger } 3377c66ac9dbSNicholas Bellinger 3378de103c93SChristoph Hellwig if (core_scsi3_lunacl_depend_item(dest_se_deve)) { 33796708bb27SAndy Grover pr_err("core_scsi3_lunacl_depend_item() failed\n"); 338029a05deeSNicholas Bellinger kref_put(&dest_se_deve->pr_kref, target_pr_kref_release); 3381c66ac9dbSNicholas Bellinger dest_se_deve = NULL; 3382de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3383c66ac9dbSNicholas Bellinger goto out; 3384c66ac9dbSNicholas Bellinger } 33858b1e1244SAndy Grover 33866708bb27SAndy Grover pr_debug("SPC-3 PR REGISTER_AND_MOVE: Located %s node %s LUN" 3387f2d30680SHannes Reinecke " ACL for dest_se_deve->mapped_lun: %llu\n", 3388c66ac9dbSNicholas Bellinger dest_tf_ops->get_fabric_name(), dest_node_acl->initiatorname, 3389c66ac9dbSNicholas Bellinger dest_se_deve->mapped_lun); 33908b1e1244SAndy Grover 3391c66ac9dbSNicholas Bellinger /* 3392c66ac9dbSNicholas Bellinger * A persistent reservation needs to already existing in order to 3393c66ac9dbSNicholas Bellinger * successfully complete the REGISTER_AND_MOVE service action.. 3394c66ac9dbSNicholas Bellinger */ 3395c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 3396c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 33976708bb27SAndy Grover if (!pr_res_holder) { 33986708bb27SAndy Grover pr_warn("SPC-3 PR REGISTER_AND_MOVE: No reservation" 3399c66ac9dbSNicholas Bellinger " currently held\n"); 3400c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3401de103c93SChristoph Hellwig ret = TCM_INVALID_CDB_FIELD; 3402c66ac9dbSNicholas Bellinger goto out; 3403c66ac9dbSNicholas Bellinger } 3404c66ac9dbSNicholas Bellinger /* 3405c66ac9dbSNicholas Bellinger * The received on I_T Nexus must be the reservation holder. 3406c66ac9dbSNicholas Bellinger * 3407c66ac9dbSNicholas Bellinger * From spc4r17 section 5.7.8 Table 50 -- 3408c66ac9dbSNicholas Bellinger * Register behaviors for a REGISTER AND MOVE service action 3409c66ac9dbSNicholas Bellinger */ 3410e673dc92SIlias Tsitsimpis if (!is_reservation_holder(pr_res_holder, pr_reg)) { 34116708bb27SAndy Grover pr_warn("SPC-3 PR REGISTER_AND_MOVE: Calling I_T" 3412c66ac9dbSNicholas Bellinger " Nexus is not reservation holder\n"); 3413c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3414de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 3415c66ac9dbSNicholas Bellinger goto out; 3416c66ac9dbSNicholas Bellinger } 3417c66ac9dbSNicholas Bellinger /* 3418c66ac9dbSNicholas Bellinger * From spc4r17 section 5.7.8: registering and moving reservation 3419c66ac9dbSNicholas Bellinger * 3420c66ac9dbSNicholas Bellinger * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service 3421c66ac9dbSNicholas Bellinger * action is received and the established persistent reservation is a 3422c66ac9dbSNicholas Bellinger * Write Exclusive - All Registrants type or Exclusive Access - 3423c66ac9dbSNicholas Bellinger * All Registrants type reservation, then the command shall be completed 3424c66ac9dbSNicholas Bellinger * with RESERVATION CONFLICT status. 3425c66ac9dbSNicholas Bellinger */ 3426c66ac9dbSNicholas Bellinger if ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 3427c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { 34286708bb27SAndy Grover pr_warn("SPC-3 PR REGISTER_AND_MOVE: Unable to move" 3429c66ac9dbSNicholas Bellinger " reservation for type: %s\n", 3430c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_res_holder->pr_res_type)); 3431c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3432de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 3433c66ac9dbSNicholas Bellinger goto out; 3434c66ac9dbSNicholas Bellinger } 3435c66ac9dbSNicholas Bellinger pr_res_nacl = pr_res_holder->pr_reg_nacl; 3436c66ac9dbSNicholas Bellinger /* 3437c66ac9dbSNicholas Bellinger * b) Ignore the contents of the (received) SCOPE and TYPE fields; 3438c66ac9dbSNicholas Bellinger */ 3439c66ac9dbSNicholas Bellinger type = pr_res_holder->pr_res_type; 3440c66ac9dbSNicholas Bellinger scope = pr_res_holder->pr_res_type; 3441c66ac9dbSNicholas Bellinger /* 3442c66ac9dbSNicholas Bellinger * c) Associate the reservation key specified in the SERVICE ACTION 3443c66ac9dbSNicholas Bellinger * RESERVATION KEY field with the I_T nexus specified as the 3444c66ac9dbSNicholas Bellinger * destination of the register and move, where: 3445c66ac9dbSNicholas Bellinger * A) The I_T nexus is specified by the TransportID and the 3446c66ac9dbSNicholas Bellinger * RELATIVE TARGET PORT IDENTIFIER field (see 6.14.4); and 3447c66ac9dbSNicholas Bellinger * B) Regardless of the TransportID format used, the association for 3448c66ac9dbSNicholas Bellinger * the initiator port is based on either the initiator port name 3449c66ac9dbSNicholas Bellinger * (see 3.1.71) on SCSI transport protocols where port names are 3450c66ac9dbSNicholas Bellinger * required or the initiator port identifier (see 3.1.70) on SCSI 3451c66ac9dbSNicholas Bellinger * transport protocols where port names are not required; 3452c66ac9dbSNicholas Bellinger * d) Register the reservation key specified in the SERVICE ACTION 3453c66ac9dbSNicholas Bellinger * RESERVATION KEY field; 3454c66ac9dbSNicholas Bellinger * e) Retain the reservation key specified in the SERVICE ACTION 3455c66ac9dbSNicholas Bellinger * RESERVATION KEY field and associated information; 3456c66ac9dbSNicholas Bellinger * 3457c66ac9dbSNicholas Bellinger * Also, It is not an error for a REGISTER AND MOVE service action to 3458c66ac9dbSNicholas Bellinger * register an I_T nexus that is already registered with the same 3459c66ac9dbSNicholas Bellinger * reservation key or a different reservation key. 3460c66ac9dbSNicholas Bellinger */ 3461c66ac9dbSNicholas Bellinger dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl, 3462c66ac9dbSNicholas Bellinger iport_ptr); 34636708bb27SAndy Grover if (!dest_pr_reg) { 346479dc9c9eSNicholas Bellinger struct se_lun *dest_lun = rcu_dereference_check(dest_se_deve->se_lun, 34652c935bc5SPeter Zijlstra kref_read(&dest_se_deve->pr_kref) != 0); 346679dc9c9eSNicholas Bellinger 3467c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 346879dc9c9eSNicholas Bellinger if (core_scsi3_alloc_registration(cmd->se_dev, dest_node_acl, 346979dc9c9eSNicholas Bellinger dest_lun, dest_se_deve, dest_se_deve->mapped_lun, 347079dc9c9eSNicholas Bellinger iport_ptr, sa_res_key, 0, aptpl, 2, 1)) { 347179dd6f2fStangwenji ret = TCM_INSUFFICIENT_REGISTRATION_RESOURCES; 3472c66ac9dbSNicholas Bellinger goto out; 3473c66ac9dbSNicholas Bellinger } 347480bfdfa9SNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 3475c66ac9dbSNicholas Bellinger dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl, 3476c66ac9dbSNicholas Bellinger iport_ptr); 3477c66ac9dbSNicholas Bellinger new_reg = 1; 3478c66ac9dbSNicholas Bellinger } 3479c66ac9dbSNicholas Bellinger /* 3480c66ac9dbSNicholas Bellinger * f) Release the persistent reservation for the persistent reservation 3481c66ac9dbSNicholas Bellinger * holder (i.e., the I_T nexus on which the 3482c66ac9dbSNicholas Bellinger */ 3483c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, pr_res_nacl, 34846c3c9baaSNicholas Bellinger dev->dev_pr_res_holder, 0, 0); 3485c66ac9dbSNicholas Bellinger /* 3486c66ac9dbSNicholas Bellinger * g) Move the persistent reservation to the specified I_T nexus using 3487c66ac9dbSNicholas Bellinger * the same scope and type as the persistent reservation released in 3488c66ac9dbSNicholas Bellinger * item f); and 3489c66ac9dbSNicholas Bellinger */ 3490c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = dest_pr_reg; 3491c66ac9dbSNicholas Bellinger dest_pr_reg->pr_res_holder = 1; 3492c66ac9dbSNicholas Bellinger dest_pr_reg->pr_res_type = type; 3493c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope = scope; 3494d2843c17SAndy Grover core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 3495c66ac9dbSNicholas Bellinger /* 3496c66ac9dbSNicholas Bellinger * Increment PRGeneration for existing registrations.. 3497c66ac9dbSNicholas Bellinger */ 34986708bb27SAndy Grover if (!new_reg) 3499c66ac9dbSNicholas Bellinger dest_pr_reg->pr_res_generation = pr_tmpl->pr_generation++; 3500c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3501c66ac9dbSNicholas Bellinger 35026708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: REGISTER_AND_MOVE" 3503c66ac9dbSNicholas Bellinger " created new reservation holder TYPE: %s on object RTPI:" 3504c66ac9dbSNicholas Bellinger " %hu PRGeneration: 0x%08x\n", dest_tf_ops->get_fabric_name(), 3505c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(type), rtpi, 3506c66ac9dbSNicholas Bellinger dest_pr_reg->pr_res_generation); 35076708bb27SAndy Grover pr_debug("SPC-3 PR Successfully moved reservation from" 3508c66ac9dbSNicholas Bellinger " %s Fabric Node: %s%s -> %s Fabric Node: %s %s\n", 3509c66ac9dbSNicholas Bellinger tf_ops->get_fabric_name(), pr_reg_nacl->initiatorname, 3510d2843c17SAndy Grover i_buf, dest_tf_ops->get_fabric_name(), 3511c66ac9dbSNicholas Bellinger dest_node_acl->initiatorname, (iport_ptr != NULL) ? 3512c66ac9dbSNicholas Bellinger iport_ptr : ""); 3513c66ac9dbSNicholas Bellinger /* 3514c66ac9dbSNicholas Bellinger * It is now safe to release configfs group dependencies for destination 3515c66ac9dbSNicholas Bellinger * of Transport ID Initiator Device/Port Identifier 3516c66ac9dbSNicholas Bellinger */ 3517c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 3518c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 3519c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_se_tpg); 3520c66ac9dbSNicholas Bellinger /* 3521c66ac9dbSNicholas Bellinger * h) If the UNREG bit is set to one, unregister (see 5.7.11.3) the I_T 3522c66ac9dbSNicholas Bellinger * nexus on which PERSISTENT RESERVE OUT command was received. 3523c66ac9dbSNicholas Bellinger */ 3524c66ac9dbSNicholas Bellinger if (unreg) { 3525c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 3526c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, NULL, 1); 3527c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 3528c66ac9dbSNicholas Bellinger } else 3529c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 3530c66ac9dbSNicholas Bellinger 3531459f213bSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, aptpl); 3532c66ac9dbSNicholas Bellinger 3533c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(dest_pr_reg); 3534c66ac9dbSNicholas Bellinger return 0; 3535c66ac9dbSNicholas Bellinger out: 353605d1c7c0SAndy Grover if (buf) 35374949314cSAndy Grover transport_kunmap_data_sg(cmd); 3538c66ac9dbSNicholas Bellinger if (dest_se_deve) 3539c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 3540c66ac9dbSNicholas Bellinger if (dest_node_acl) 3541c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 3542c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_se_tpg); 3543de103c93SChristoph Hellwig 3544de103c93SChristoph Hellwig out_put_pr_reg: 3545c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 3546c66ac9dbSNicholas Bellinger return ret; 3547c66ac9dbSNicholas Bellinger } 3548c66ac9dbSNicholas Bellinger 3549c66ac9dbSNicholas Bellinger /* 3550c66ac9dbSNicholas Bellinger * See spc4r17 section 6.14 Table 170 3551c66ac9dbSNicholas Bellinger */ 3552de103c93SChristoph Hellwig sense_reason_t 3553de103c93SChristoph Hellwig target_scsi3_emulate_pr_out(struct se_cmd *cmd) 3554c66ac9dbSNicholas Bellinger { 355592404e60SNicholas Bellinger struct se_device *dev = cmd->se_dev; 3556617c0e06SChristoph Hellwig unsigned char *cdb = &cmd->t_task_cdb[0]; 355705d1c7c0SAndy Grover unsigned char *buf; 3558c66ac9dbSNicholas Bellinger u64 res_key, sa_res_key; 3559c66ac9dbSNicholas Bellinger int sa, scope, type, aptpl; 3560c66ac9dbSNicholas Bellinger int spec_i_pt = 0, all_tg_pt = 0, unreg = 0; 3561de103c93SChristoph Hellwig sense_reason_t ret; 3562617c0e06SChristoph Hellwig 3563617c0e06SChristoph Hellwig /* 3564617c0e06SChristoph Hellwig * Following spc2r20 5.5.1 Reservations overview: 3565617c0e06SChristoph Hellwig * 3566617c0e06SChristoph Hellwig * If a logical unit has been reserved by any RESERVE command and is 3567617c0e06SChristoph Hellwig * still reserved by any initiator, all PERSISTENT RESERVE IN and all 3568617c0e06SChristoph Hellwig * PERSISTENT RESERVE OUT commands shall conflict regardless of 3569617c0e06SChristoph Hellwig * initiator or service action and shall terminate with a RESERVATION 3570617c0e06SChristoph Hellwig * CONFLICT status. 3571617c0e06SChristoph Hellwig */ 35720fd97ccfSChristoph Hellwig if (cmd->se_dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) { 3573617c0e06SChristoph Hellwig pr_err("Received PERSISTENT_RESERVE CDB while legacy" 3574617c0e06SChristoph Hellwig " SPC-2 reservation is held, returning" 3575617c0e06SChristoph Hellwig " RESERVATION_CONFLICT\n"); 3576de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 3577617c0e06SChristoph Hellwig } 3578617c0e06SChristoph Hellwig 3579c66ac9dbSNicholas Bellinger /* 3580c66ac9dbSNicholas Bellinger * FIXME: A NULL struct se_session pointer means an this is not coming from 3581c66ac9dbSNicholas Bellinger * a $FABRIC_MOD's nexus, but from internal passthrough ops. 3582c66ac9dbSNicholas Bellinger */ 3583de103c93SChristoph Hellwig if (!cmd->se_sess) 3584de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3585c66ac9dbSNicholas Bellinger 3586c66ac9dbSNicholas Bellinger if (cmd->data_length < 24) { 35876708bb27SAndy Grover pr_warn("SPC-PR: Received PR OUT parameter list" 3588c66ac9dbSNicholas Bellinger " length too small: %u\n", cmd->data_length); 35897ee00317STang Wenji return TCM_PARAMETER_LIST_LENGTH_ERROR; 3590c66ac9dbSNicholas Bellinger } 3591de103c93SChristoph Hellwig 3592c66ac9dbSNicholas Bellinger /* 3593c66ac9dbSNicholas Bellinger * From the PERSISTENT_RESERVE_OUT command descriptor block (CDB) 3594c66ac9dbSNicholas Bellinger */ 3595c66ac9dbSNicholas Bellinger sa = (cdb[1] & 0x1f); 3596c66ac9dbSNicholas Bellinger scope = (cdb[2] & 0xf0); 3597c66ac9dbSNicholas Bellinger type = (cdb[2] & 0x0f); 359805d1c7c0SAndy Grover 35994949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3600de103c93SChristoph Hellwig if (!buf) 3601de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3602de103c93SChristoph Hellwig 3603c66ac9dbSNicholas Bellinger /* 3604c66ac9dbSNicholas Bellinger * From PERSISTENT_RESERVE_OUT parameter list (payload) 3605c66ac9dbSNicholas Bellinger */ 3606a85d667eSBart Van Assche res_key = get_unaligned_be64(&buf[0]); 3607a85d667eSBart Van Assche sa_res_key = get_unaligned_be64(&buf[8]); 3608c66ac9dbSNicholas Bellinger /* 3609c66ac9dbSNicholas Bellinger * REGISTER_AND_MOVE uses a different SA parameter list containing 3610c66ac9dbSNicholas Bellinger * SCSI TransportIDs. 3611c66ac9dbSNicholas Bellinger */ 3612c66ac9dbSNicholas Bellinger if (sa != PRO_REGISTER_AND_MOVE) { 3613c66ac9dbSNicholas Bellinger spec_i_pt = (buf[20] & 0x08); 3614c66ac9dbSNicholas Bellinger all_tg_pt = (buf[20] & 0x04); 3615c66ac9dbSNicholas Bellinger aptpl = (buf[20] & 0x01); 3616c66ac9dbSNicholas Bellinger } else { 3617c66ac9dbSNicholas Bellinger aptpl = (buf[17] & 0x01); 3618c66ac9dbSNicholas Bellinger unreg = (buf[17] & 0x02); 3619c66ac9dbSNicholas Bellinger } 362092404e60SNicholas Bellinger /* 362192404e60SNicholas Bellinger * If the backend device has been configured to force APTPL metadata 362292404e60SNicholas Bellinger * write-out, go ahead and propigate aptpl=1 down now. 362392404e60SNicholas Bellinger */ 362492404e60SNicholas Bellinger if (dev->dev_attrib.force_pr_aptpl) 362592404e60SNicholas Bellinger aptpl = 1; 362692404e60SNicholas Bellinger 36274949314cSAndy Grover transport_kunmap_data_sg(cmd); 362805d1c7c0SAndy Grover buf = NULL; 362905d1c7c0SAndy Grover 3630c66ac9dbSNicholas Bellinger /* 3631c66ac9dbSNicholas Bellinger * SPEC_I_PT=1 is only valid for Service action: REGISTER 3632c66ac9dbSNicholas Bellinger */ 36337ee00317STang Wenji if (spec_i_pt && (sa != PRO_REGISTER)) 3634de103c93SChristoph Hellwig return TCM_INVALID_PARAMETER_LIST; 3635d29a5b6aSChristoph Hellwig 3636c66ac9dbSNicholas Bellinger /* 3637c66ac9dbSNicholas Bellinger * From spc4r17 section 6.14: 3638c66ac9dbSNicholas Bellinger * 3639c66ac9dbSNicholas Bellinger * If the SPEC_I_PT bit is set to zero, the service action is not 3640c66ac9dbSNicholas Bellinger * REGISTER AND MOVE, and the parameter list length is not 24, then 3641c66ac9dbSNicholas Bellinger * the command shall be terminated with CHECK CONDITION status, with 3642c66ac9dbSNicholas Bellinger * the sense key set to ILLEGAL REQUEST, and the additional sense 3643c66ac9dbSNicholas Bellinger * code set to PARAMETER LIST LENGTH ERROR. 3644c66ac9dbSNicholas Bellinger */ 36457ee00317STang Wenji if (!spec_i_pt && (sa != PRO_REGISTER_AND_MOVE) && 3646c66ac9dbSNicholas Bellinger (cmd->data_length != 24)) { 36476708bb27SAndy Grover pr_warn("SPC-PR: Received PR OUT illegal parameter" 3648c66ac9dbSNicholas Bellinger " list length: %u\n", cmd->data_length); 36497ee00317STang Wenji return TCM_PARAMETER_LIST_LENGTH_ERROR; 3650c66ac9dbSNicholas Bellinger } 3651de103c93SChristoph Hellwig 3652c66ac9dbSNicholas Bellinger /* 3653c66ac9dbSNicholas Bellinger * (core_scsi3_emulate_pro_* function parameters 3654c66ac9dbSNicholas Bellinger * are defined by spc4r17 Table 174: 3655c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_OUT service actions and valid parameters. 3656c66ac9dbSNicholas Bellinger */ 3657c66ac9dbSNicholas Bellinger switch (sa) { 3658c66ac9dbSNicholas Bellinger case PRO_REGISTER: 3659d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_register(cmd, 366033ce6a87SAndy Grover res_key, sa_res_key, aptpl, all_tg_pt, spec_i_pt, REGISTER); 3661d29a5b6aSChristoph Hellwig break; 3662c66ac9dbSNicholas Bellinger case PRO_RESERVE: 3663d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_reserve(cmd, type, scope, res_key); 3664d29a5b6aSChristoph Hellwig break; 3665c66ac9dbSNicholas Bellinger case PRO_RELEASE: 3666d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_release(cmd, type, scope, res_key); 3667d29a5b6aSChristoph Hellwig break; 3668c66ac9dbSNicholas Bellinger case PRO_CLEAR: 3669d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_clear(cmd, res_key); 3670d29a5b6aSChristoph Hellwig break; 3671c66ac9dbSNicholas Bellinger case PRO_PREEMPT: 3672d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_preempt(cmd, type, scope, 367333ce6a87SAndy Grover res_key, sa_res_key, PREEMPT); 3674d29a5b6aSChristoph Hellwig break; 3675c66ac9dbSNicholas Bellinger case PRO_PREEMPT_AND_ABORT: 3676d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_preempt(cmd, type, scope, 367733ce6a87SAndy Grover res_key, sa_res_key, PREEMPT_AND_ABORT); 3678d29a5b6aSChristoph Hellwig break; 3679c66ac9dbSNicholas Bellinger case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: 3680d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_register(cmd, 368133ce6a87SAndy Grover 0, sa_res_key, aptpl, all_tg_pt, spec_i_pt, REGISTER_AND_IGNORE_EXISTING_KEY); 3682d29a5b6aSChristoph Hellwig break; 3683c66ac9dbSNicholas Bellinger case PRO_REGISTER_AND_MOVE: 3684d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_register_and_move(cmd, res_key, 3685c66ac9dbSNicholas Bellinger sa_res_key, aptpl, unreg); 3686d29a5b6aSChristoph Hellwig break; 3687c66ac9dbSNicholas Bellinger default: 36886708bb27SAndy Grover pr_err("Unknown PERSISTENT_RESERVE_OUT service" 36897ee00317STang Wenji " action: 0x%02x\n", sa); 3690de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 3691c66ac9dbSNicholas Bellinger } 3692c66ac9dbSNicholas Bellinger 36936bb35e00SChristoph Hellwig if (!ret) 36946bb35e00SChristoph Hellwig target_complete_cmd(cmd, GOOD); 3695d29a5b6aSChristoph Hellwig return ret; 3696c66ac9dbSNicholas Bellinger } 3697c66ac9dbSNicholas Bellinger 3698c66ac9dbSNicholas Bellinger /* 3699c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_IN Service Action READ_KEYS 3700c66ac9dbSNicholas Bellinger * 3701c66ac9dbSNicholas Bellinger * See spc4r17 section 5.7.6.2 and section 6.13.2, Table 160 3702c66ac9dbSNicholas Bellinger */ 3703de103c93SChristoph Hellwig static sense_reason_t 3704de103c93SChristoph Hellwig core_scsi3_pri_read_keys(struct se_cmd *cmd) 3705c66ac9dbSNicholas Bellinger { 37060fd97ccfSChristoph Hellwig struct se_device *dev = cmd->se_dev; 3707c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 370805d1c7c0SAndy Grover unsigned char *buf; 3709c66ac9dbSNicholas Bellinger u32 add_len = 0, off = 8; 3710c66ac9dbSNicholas Bellinger 3711c66ac9dbSNicholas Bellinger if (cmd->data_length < 8) { 37126708bb27SAndy Grover pr_err("PRIN SA READ_KEYS SCSI Data Length: %u" 3713c66ac9dbSNicholas Bellinger " too small\n", cmd->data_length); 3714de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 3715c66ac9dbSNicholas Bellinger } 3716c66ac9dbSNicholas Bellinger 37174949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3718de103c93SChristoph Hellwig if (!buf) 3719de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3720de103c93SChristoph Hellwig 3721a85d667eSBart Van Assche put_unaligned_be32(dev->t10_pr.pr_generation, buf); 3722c66ac9dbSNicholas Bellinger 37230fd97ccfSChristoph Hellwig spin_lock(&dev->t10_pr.registration_lock); 37240fd97ccfSChristoph Hellwig list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 3725c66ac9dbSNicholas Bellinger pr_reg_list) { 3726c66ac9dbSNicholas Bellinger /* 3727c66ac9dbSNicholas Bellinger * Check for overflow of 8byte PRI READ_KEYS payload and 3728c66ac9dbSNicholas Bellinger * next reservation key list descriptor. 3729c66ac9dbSNicholas Bellinger */ 373063ce3c38SDavid Disseldorp if (off + 8 <= cmd->data_length) { 3731a85d667eSBart Van Assche put_unaligned_be64(pr_reg->pr_res_key, &buf[off]); 3732a85d667eSBart Van Assche off += 8; 373363ce3c38SDavid Disseldorp } 373463ce3c38SDavid Disseldorp /* 373563ce3c38SDavid Disseldorp * SPC5r17: 6.16.2 READ KEYS service action 373663ce3c38SDavid Disseldorp * The ADDITIONAL LENGTH field indicates the number of bytes in 373763ce3c38SDavid Disseldorp * the Reservation key list. The contents of the ADDITIONAL 373863ce3c38SDavid Disseldorp * LENGTH field are not altered based on the allocation length 373963ce3c38SDavid Disseldorp */ 3740c66ac9dbSNicholas Bellinger add_len += 8; 3741c66ac9dbSNicholas Bellinger } 37420fd97ccfSChristoph Hellwig spin_unlock(&dev->t10_pr.registration_lock); 3743c66ac9dbSNicholas Bellinger 3744a85d667eSBart Van Assche put_unaligned_be32(add_len, &buf[4]); 3745c66ac9dbSNicholas Bellinger 37464949314cSAndy Grover transport_kunmap_data_sg(cmd); 374705d1c7c0SAndy Grover 3748c66ac9dbSNicholas Bellinger return 0; 3749c66ac9dbSNicholas Bellinger } 3750c66ac9dbSNicholas Bellinger 3751c66ac9dbSNicholas Bellinger /* 3752c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_IN Service Action READ_RESERVATION 3753c66ac9dbSNicholas Bellinger * 3754c66ac9dbSNicholas Bellinger * See spc4r17 section 5.7.6.3 and section 6.13.3.2 Table 161 and 162 3755c66ac9dbSNicholas Bellinger */ 3756de103c93SChristoph Hellwig static sense_reason_t 3757de103c93SChristoph Hellwig core_scsi3_pri_read_reservation(struct se_cmd *cmd) 3758c66ac9dbSNicholas Bellinger { 37590fd97ccfSChristoph Hellwig struct se_device *dev = cmd->se_dev; 3760c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 376105d1c7c0SAndy Grover unsigned char *buf; 3762c66ac9dbSNicholas Bellinger u64 pr_res_key; 3763c66ac9dbSNicholas Bellinger u32 add_len = 16; /* Hardcoded to 16 when a reservation is held. */ 3764c66ac9dbSNicholas Bellinger 3765c66ac9dbSNicholas Bellinger if (cmd->data_length < 8) { 37666708bb27SAndy Grover pr_err("PRIN SA READ_RESERVATIONS SCSI Data Length: %u" 3767c66ac9dbSNicholas Bellinger " too small\n", cmd->data_length); 3768de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 3769c66ac9dbSNicholas Bellinger } 3770c66ac9dbSNicholas Bellinger 37714949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3772de103c93SChristoph Hellwig if (!buf) 3773de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3774de103c93SChristoph Hellwig 3775a85d667eSBart Van Assche put_unaligned_be32(dev->t10_pr.pr_generation, &buf[0]); 3776c66ac9dbSNicholas Bellinger 37770fd97ccfSChristoph Hellwig spin_lock(&dev->dev_reservation_lock); 37780fd97ccfSChristoph Hellwig pr_reg = dev->dev_pr_res_holder; 3779ee1b1b9cSAndy Grover if (pr_reg) { 3780c66ac9dbSNicholas Bellinger /* 3781c66ac9dbSNicholas Bellinger * Set the hardcoded Additional Length 3782c66ac9dbSNicholas Bellinger */ 3783a85d667eSBart Van Assche put_unaligned_be32(add_len, &buf[4]); 3784c66ac9dbSNicholas Bellinger 378505d1c7c0SAndy Grover if (cmd->data_length < 22) 378605d1c7c0SAndy Grover goto err; 378705d1c7c0SAndy Grover 3788c66ac9dbSNicholas Bellinger /* 3789c66ac9dbSNicholas Bellinger * Set the Reservation key. 3790c66ac9dbSNicholas Bellinger * 3791c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.10: 3792c66ac9dbSNicholas Bellinger * A persistent reservation holder has its reservation key 3793c66ac9dbSNicholas Bellinger * returned in the parameter data from a PERSISTENT 3794c66ac9dbSNicholas Bellinger * RESERVE IN command with READ RESERVATION service action as 3795c66ac9dbSNicholas Bellinger * follows: 3796c66ac9dbSNicholas Bellinger * a) For a persistent reservation of the type Write Exclusive 3797c66ac9dbSNicholas Bellinger * - All Registrants or Exclusive Access All Regitrants, 3798c66ac9dbSNicholas Bellinger * the reservation key shall be set to zero; or 3799c66ac9dbSNicholas Bellinger * b) For all other persistent reservation types, the 3800c66ac9dbSNicholas Bellinger * reservation key shall be set to the registered 3801c66ac9dbSNicholas Bellinger * reservation key for the I_T nexus that holds the 3802c66ac9dbSNicholas Bellinger * persistent reservation. 3803c66ac9dbSNicholas Bellinger */ 3804c66ac9dbSNicholas Bellinger if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 3805c66ac9dbSNicholas Bellinger (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) 3806c66ac9dbSNicholas Bellinger pr_res_key = 0; 3807c66ac9dbSNicholas Bellinger else 3808c66ac9dbSNicholas Bellinger pr_res_key = pr_reg->pr_res_key; 3809c66ac9dbSNicholas Bellinger 3810a85d667eSBart Van Assche put_unaligned_be64(pr_res_key, &buf[8]); 3811c66ac9dbSNicholas Bellinger /* 3812c66ac9dbSNicholas Bellinger * Set the SCOPE and TYPE 3813c66ac9dbSNicholas Bellinger */ 3814c66ac9dbSNicholas Bellinger buf[21] = (pr_reg->pr_res_scope & 0xf0) | 3815c66ac9dbSNicholas Bellinger (pr_reg->pr_res_type & 0x0f); 3816c66ac9dbSNicholas Bellinger } 381705d1c7c0SAndy Grover 381805d1c7c0SAndy Grover err: 38190fd97ccfSChristoph Hellwig spin_unlock(&dev->dev_reservation_lock); 38204949314cSAndy Grover transport_kunmap_data_sg(cmd); 3821c66ac9dbSNicholas Bellinger 3822c66ac9dbSNicholas Bellinger return 0; 3823c66ac9dbSNicholas Bellinger } 3824c66ac9dbSNicholas Bellinger 3825c66ac9dbSNicholas Bellinger /* 3826c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_IN Service Action REPORT_CAPABILITIES 3827c66ac9dbSNicholas Bellinger * 3828c66ac9dbSNicholas Bellinger * See spc4r17 section 6.13.4 Table 165 3829c66ac9dbSNicholas Bellinger */ 3830de103c93SChristoph Hellwig static sense_reason_t 3831de103c93SChristoph Hellwig core_scsi3_pri_report_capabilities(struct se_cmd *cmd) 3832c66ac9dbSNicholas Bellinger { 38335951146dSAndy Grover struct se_device *dev = cmd->se_dev; 38340fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 383505d1c7c0SAndy Grover unsigned char *buf; 3836c66ac9dbSNicholas Bellinger u16 add_len = 8; /* Hardcoded to 8. */ 3837c66ac9dbSNicholas Bellinger 3838c66ac9dbSNicholas Bellinger if (cmd->data_length < 6) { 38396708bb27SAndy Grover pr_err("PRIN SA REPORT_CAPABILITIES SCSI Data Length:" 3840c66ac9dbSNicholas Bellinger " %u too small\n", cmd->data_length); 3841de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 3842c66ac9dbSNicholas Bellinger } 3843c66ac9dbSNicholas Bellinger 38444949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3845de103c93SChristoph Hellwig if (!buf) 3846de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 384705d1c7c0SAndy Grover 3848a85d667eSBart Van Assche put_unaligned_be16(add_len, &buf[0]); 3849c66ac9dbSNicholas Bellinger buf[2] |= 0x10; /* CRH: Compatible Reservation Hanlding bit. */ 3850c66ac9dbSNicholas Bellinger buf[2] |= 0x08; /* SIP_C: Specify Initiator Ports Capable bit */ 3851c66ac9dbSNicholas Bellinger buf[2] |= 0x04; /* ATP_C: All Target Ports Capable bit */ 3852c66ac9dbSNicholas Bellinger buf[2] |= 0x01; /* PTPL_C: Persistence across Target Power Loss bit */ 3853c66ac9dbSNicholas Bellinger /* 3854c66ac9dbSNicholas Bellinger * We are filling in the PERSISTENT RESERVATION TYPE MASK below, so 3855c66ac9dbSNicholas Bellinger * set the TMV: Task Mask Valid bit. 3856c66ac9dbSNicholas Bellinger */ 3857c66ac9dbSNicholas Bellinger buf[3] |= 0x80; 3858c66ac9dbSNicholas Bellinger /* 3859c66ac9dbSNicholas Bellinger * Change ALLOW COMMANDs to 0x20 or 0x40 later from Table 166 3860c66ac9dbSNicholas Bellinger */ 3861c66ac9dbSNicholas Bellinger buf[3] |= 0x10; /* ALLOW COMMANDs field 001b */ 3862c66ac9dbSNicholas Bellinger /* 3863c66ac9dbSNicholas Bellinger * PTPL_A: Persistence across Target Power Loss Active bit 3864c66ac9dbSNicholas Bellinger */ 3865c66ac9dbSNicholas Bellinger if (pr_tmpl->pr_aptpl_active) 3866c66ac9dbSNicholas Bellinger buf[3] |= 0x01; 3867c66ac9dbSNicholas Bellinger /* 3868c66ac9dbSNicholas Bellinger * Setup the PERSISTENT RESERVATION TYPE MASK from Table 167 3869c66ac9dbSNicholas Bellinger */ 3870c66ac9dbSNicholas Bellinger buf[4] |= 0x80; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ 3871c66ac9dbSNicholas Bellinger buf[4] |= 0x40; /* PR_TYPE_EXCLUSIVE_ACCESS_REGONLY */ 3872c66ac9dbSNicholas Bellinger buf[4] |= 0x20; /* PR_TYPE_WRITE_EXCLUSIVE_REGONLY */ 3873c66ac9dbSNicholas Bellinger buf[4] |= 0x08; /* PR_TYPE_EXCLUSIVE_ACCESS */ 3874c66ac9dbSNicholas Bellinger buf[4] |= 0x02; /* PR_TYPE_WRITE_EXCLUSIVE */ 3875c66ac9dbSNicholas Bellinger buf[5] |= 0x01; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ 3876c66ac9dbSNicholas Bellinger 38774949314cSAndy Grover transport_kunmap_data_sg(cmd); 387805d1c7c0SAndy Grover 3879c66ac9dbSNicholas Bellinger return 0; 3880c66ac9dbSNicholas Bellinger } 3881c66ac9dbSNicholas Bellinger 3882c66ac9dbSNicholas Bellinger /* 3883c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_IN Service Action READ_FULL_STATUS 3884c66ac9dbSNicholas Bellinger * 3885c66ac9dbSNicholas Bellinger * See spc4r17 section 6.13.5 Table 168 and 169 3886c66ac9dbSNicholas Bellinger */ 3887de103c93SChristoph Hellwig static sense_reason_t 3888de103c93SChristoph Hellwig core_scsi3_pri_read_full_status(struct se_cmd *cmd) 3889c66ac9dbSNicholas Bellinger { 38900fd97ccfSChristoph Hellwig struct se_device *dev = cmd->se_dev; 3891c66ac9dbSNicholas Bellinger struct se_node_acl *se_nacl; 3892c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg; 3893c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp; 38940fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 389505d1c7c0SAndy Grover unsigned char *buf; 38962650d71eSChristoph Hellwig u32 add_desc_len = 0, add_len = 0; 3897c66ac9dbSNicholas Bellinger u32 off = 8; /* off into first Full Status descriptor */ 3898d16ca7c5SNicholas Bellinger int format_code = 0, pr_res_type = 0, pr_res_scope = 0; 38992650d71eSChristoph Hellwig int exp_desc_len, desc_len; 3900d16ca7c5SNicholas Bellinger bool all_reg = false; 3901c66ac9dbSNicholas Bellinger 3902c66ac9dbSNicholas Bellinger if (cmd->data_length < 8) { 39036708bb27SAndy Grover pr_err("PRIN SA READ_FULL_STATUS SCSI Data Length: %u" 3904c66ac9dbSNicholas Bellinger " too small\n", cmd->data_length); 3905de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 3906c66ac9dbSNicholas Bellinger } 3907c66ac9dbSNicholas Bellinger 39084949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3909de103c93SChristoph Hellwig if (!buf) 3910de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 391105d1c7c0SAndy Grover 3912a85d667eSBart Van Assche put_unaligned_be32(dev->t10_pr.pr_generation, &buf[0]); 3913c66ac9dbSNicholas Bellinger 3914d16ca7c5SNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 3915d16ca7c5SNicholas Bellinger if (dev->dev_pr_res_holder) { 3916d16ca7c5SNicholas Bellinger struct t10_pr_registration *pr_holder = dev->dev_pr_res_holder; 3917d16ca7c5SNicholas Bellinger 3918d16ca7c5SNicholas Bellinger if (pr_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG || 3919d16ca7c5SNicholas Bellinger pr_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG) { 3920d16ca7c5SNicholas Bellinger all_reg = true; 3921d16ca7c5SNicholas Bellinger pr_res_type = pr_holder->pr_res_type; 3922d16ca7c5SNicholas Bellinger pr_res_scope = pr_holder->pr_res_scope; 3923d16ca7c5SNicholas Bellinger } 3924d16ca7c5SNicholas Bellinger } 3925d16ca7c5SNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3926d16ca7c5SNicholas Bellinger 3927c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 3928c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 3929c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 3930c66ac9dbSNicholas Bellinger 3931c66ac9dbSNicholas Bellinger se_nacl = pr_reg->pr_reg_nacl; 3932c66ac9dbSNicholas Bellinger se_tpg = pr_reg->pr_reg_nacl->se_tpg; 3933c66ac9dbSNicholas Bellinger add_desc_len = 0; 3934c66ac9dbSNicholas Bellinger 393533940d09SJoern Engel atomic_inc_mb(&pr_reg->pr_res_holders); 3936c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 3937c66ac9dbSNicholas Bellinger /* 3938c66ac9dbSNicholas Bellinger * Determine expected length of $FABRIC_MOD specific 3939c66ac9dbSNicholas Bellinger * TransportID full status descriptor.. 3940c66ac9dbSNicholas Bellinger */ 39412650d71eSChristoph Hellwig exp_desc_len = target_get_pr_transport_id_len(se_nacl, pr_reg, 39422650d71eSChristoph Hellwig &format_code); 39432650d71eSChristoph Hellwig if (exp_desc_len < 0 || 39442650d71eSChristoph Hellwig exp_desc_len + add_len > cmd->data_length) { 39456708bb27SAndy Grover pr_warn("SPC-3 PRIN READ_FULL_STATUS ran" 3946c66ac9dbSNicholas Bellinger " out of buffer: %d\n", cmd->data_length); 3947c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 394833940d09SJoern Engel atomic_dec_mb(&pr_reg->pr_res_holders); 3949c66ac9dbSNicholas Bellinger break; 3950c66ac9dbSNicholas Bellinger } 3951c66ac9dbSNicholas Bellinger /* 3952c66ac9dbSNicholas Bellinger * Set RESERVATION KEY 3953c66ac9dbSNicholas Bellinger */ 3954a85d667eSBart Van Assche put_unaligned_be64(pr_reg->pr_res_key, &buf[off]); 3955a85d667eSBart Van Assche off += 8; 3956c66ac9dbSNicholas Bellinger off += 4; /* Skip Over Reserved area */ 3957c66ac9dbSNicholas Bellinger 3958c66ac9dbSNicholas Bellinger /* 3959c66ac9dbSNicholas Bellinger * Set ALL_TG_PT bit if PROUT SA REGISTER had this set. 3960c66ac9dbSNicholas Bellinger */ 3961c66ac9dbSNicholas Bellinger if (pr_reg->pr_reg_all_tg_pt) 3962c66ac9dbSNicholas Bellinger buf[off] = 0x02; 3963c66ac9dbSNicholas Bellinger /* 3964c66ac9dbSNicholas Bellinger * The struct se_lun pointer will be present for the 3965c66ac9dbSNicholas Bellinger * reservation holder for PR_HOLDER bit. 3966c66ac9dbSNicholas Bellinger * 3967c66ac9dbSNicholas Bellinger * Also, if this registration is the reservation 3968d16ca7c5SNicholas Bellinger * holder or there is an All Registrants reservation 3969d16ca7c5SNicholas Bellinger * active, fill in SCOPE and TYPE in the next byte. 3970c66ac9dbSNicholas Bellinger */ 3971c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_holder) { 3972c66ac9dbSNicholas Bellinger buf[off++] |= 0x01; 3973c66ac9dbSNicholas Bellinger buf[off++] = (pr_reg->pr_res_scope & 0xf0) | 3974c66ac9dbSNicholas Bellinger (pr_reg->pr_res_type & 0x0f); 3975d16ca7c5SNicholas Bellinger } else if (all_reg) { 3976d16ca7c5SNicholas Bellinger buf[off++] |= 0x01; 3977d16ca7c5SNicholas Bellinger buf[off++] = (pr_res_scope & 0xf0) | 3978d16ca7c5SNicholas Bellinger (pr_res_type & 0x0f); 3979d16ca7c5SNicholas Bellinger } else { 3980c66ac9dbSNicholas Bellinger off += 2; 3981d16ca7c5SNicholas Bellinger } 3982c66ac9dbSNicholas Bellinger 3983c66ac9dbSNicholas Bellinger off += 4; /* Skip over reserved area */ 3984c66ac9dbSNicholas Bellinger /* 3985c66ac9dbSNicholas Bellinger * From spc4r17 6.3.15: 3986c66ac9dbSNicholas Bellinger * 3987c66ac9dbSNicholas Bellinger * If the ALL_TG_PT bit set to zero, the RELATIVE TARGET PORT 3988c66ac9dbSNicholas Bellinger * IDENTIFIER field contains the relative port identifier (see 3989c66ac9dbSNicholas Bellinger * 3.1.120) of the target port that is part of the I_T nexus 3990c66ac9dbSNicholas Bellinger * described by this full status descriptor. If the ALL_TG_PT 3991c66ac9dbSNicholas Bellinger * bit is set to one, the contents of the RELATIVE TARGET PORT 3992c66ac9dbSNicholas Bellinger * IDENTIFIER field are not defined by this standard. 3993c66ac9dbSNicholas Bellinger */ 39946708bb27SAndy Grover if (!pr_reg->pr_reg_all_tg_pt) { 399579dc9c9eSNicholas Bellinger u16 sep_rtpi = pr_reg->tg_pt_sep_rtpi; 3996c66ac9dbSNicholas Bellinger 3997a85d667eSBart Van Assche put_unaligned_be16(sep_rtpi, &buf[off]); 3998a85d667eSBart Van Assche off += 2; 3999c66ac9dbSNicholas Bellinger } else 400035d1efe8SMasanari Iida off += 2; /* Skip over RELATIVE TARGET PORT IDENTIFIER */ 4001c66ac9dbSNicholas Bellinger 40022650d71eSChristoph Hellwig buf[off+4] = se_tpg->proto_id; 40032650d71eSChristoph Hellwig 4004c66ac9dbSNicholas Bellinger /* 40052650d71eSChristoph Hellwig * Now, have the $FABRIC_MOD fill in the transport ID. 4006c66ac9dbSNicholas Bellinger */ 40072650d71eSChristoph Hellwig desc_len = target_get_pr_transport_id(se_nacl, pr_reg, 40082650d71eSChristoph Hellwig &format_code, &buf[off+4]); 4009c66ac9dbSNicholas Bellinger 4010c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 401133940d09SJoern Engel atomic_dec_mb(&pr_reg->pr_res_holders); 40122650d71eSChristoph Hellwig 40132650d71eSChristoph Hellwig if (desc_len < 0) 40142650d71eSChristoph Hellwig break; 4015c66ac9dbSNicholas Bellinger /* 4016c66ac9dbSNicholas Bellinger * Set the ADDITIONAL DESCRIPTOR LENGTH 4017c66ac9dbSNicholas Bellinger */ 4018a85d667eSBart Van Assche put_unaligned_be32(desc_len, &buf[off]); 4019c58a252bStangwenji off += 4; 4020c66ac9dbSNicholas Bellinger /* 4021c66ac9dbSNicholas Bellinger * Size of full desctipor header minus TransportID 4022c66ac9dbSNicholas Bellinger * containing $FABRIC_MOD specific) initiator device/port 4023c66ac9dbSNicholas Bellinger * WWN information. 4024c66ac9dbSNicholas Bellinger * 4025c66ac9dbSNicholas Bellinger * See spc4r17 Section 6.13.5 Table 169 4026c66ac9dbSNicholas Bellinger */ 4027c66ac9dbSNicholas Bellinger add_desc_len = (24 + desc_len); 4028c66ac9dbSNicholas Bellinger 4029c66ac9dbSNicholas Bellinger off += desc_len; 4030c66ac9dbSNicholas Bellinger add_len += add_desc_len; 4031c66ac9dbSNicholas Bellinger } 4032c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 4033c66ac9dbSNicholas Bellinger /* 4034c66ac9dbSNicholas Bellinger * Set ADDITIONAL_LENGTH 4035c66ac9dbSNicholas Bellinger */ 4036a85d667eSBart Van Assche put_unaligned_be32(add_len, &buf[4]); 4037c66ac9dbSNicholas Bellinger 40384949314cSAndy Grover transport_kunmap_data_sg(cmd); 403905d1c7c0SAndy Grover 4040c66ac9dbSNicholas Bellinger return 0; 4041c66ac9dbSNicholas Bellinger } 4042c66ac9dbSNicholas Bellinger 4043de103c93SChristoph Hellwig sense_reason_t 4044de103c93SChristoph Hellwig target_scsi3_emulate_pr_in(struct se_cmd *cmd) 4045c66ac9dbSNicholas Bellinger { 4046de103c93SChristoph Hellwig sense_reason_t ret; 4047e76a35d6SChristoph Hellwig 4048617c0e06SChristoph Hellwig /* 4049617c0e06SChristoph Hellwig * Following spc2r20 5.5.1 Reservations overview: 4050617c0e06SChristoph Hellwig * 4051617c0e06SChristoph Hellwig * If a logical unit has been reserved by any RESERVE command and is 4052617c0e06SChristoph Hellwig * still reserved by any initiator, all PERSISTENT RESERVE IN and all 4053617c0e06SChristoph Hellwig * PERSISTENT RESERVE OUT commands shall conflict regardless of 4054617c0e06SChristoph Hellwig * initiator or service action and shall terminate with a RESERVATION 4055617c0e06SChristoph Hellwig * CONFLICT status. 4056617c0e06SChristoph Hellwig */ 40570fd97ccfSChristoph Hellwig if (cmd->se_dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) { 4058617c0e06SChristoph Hellwig pr_err("Received PERSISTENT_RESERVE CDB while legacy" 4059617c0e06SChristoph Hellwig " SPC-2 reservation is held, returning" 4060617c0e06SChristoph Hellwig " RESERVATION_CONFLICT\n"); 4061de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 4062617c0e06SChristoph Hellwig } 4063617c0e06SChristoph Hellwig 4064617c0e06SChristoph Hellwig switch (cmd->t_task_cdb[1] & 0x1f) { 4065c66ac9dbSNicholas Bellinger case PRI_READ_KEYS: 4066d29a5b6aSChristoph Hellwig ret = core_scsi3_pri_read_keys(cmd); 4067d29a5b6aSChristoph Hellwig break; 4068c66ac9dbSNicholas Bellinger case PRI_READ_RESERVATION: 4069d29a5b6aSChristoph Hellwig ret = core_scsi3_pri_read_reservation(cmd); 4070d29a5b6aSChristoph Hellwig break; 4071c66ac9dbSNicholas Bellinger case PRI_REPORT_CAPABILITIES: 4072d29a5b6aSChristoph Hellwig ret = core_scsi3_pri_report_capabilities(cmd); 4073d29a5b6aSChristoph Hellwig break; 4074c66ac9dbSNicholas Bellinger case PRI_READ_FULL_STATUS: 4075d29a5b6aSChristoph Hellwig ret = core_scsi3_pri_read_full_status(cmd); 4076d29a5b6aSChristoph Hellwig break; 4077c66ac9dbSNicholas Bellinger default: 40786708bb27SAndy Grover pr_err("Unknown PERSISTENT_RESERVE_IN service" 4079617c0e06SChristoph Hellwig " action: 0x%02x\n", cmd->t_task_cdb[1] & 0x1f); 4080de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 4081c66ac9dbSNicholas Bellinger } 4082d29a5b6aSChristoph Hellwig 40836bb35e00SChristoph Hellwig if (!ret) 40846bb35e00SChristoph Hellwig target_complete_cmd(cmd, GOOD); 4085d29a5b6aSChristoph Hellwig return ret; 4086c66ac9dbSNicholas Bellinger } 4087c66ac9dbSNicholas Bellinger 4088de103c93SChristoph Hellwig sense_reason_t 4089de103c93SChristoph Hellwig target_check_reservation(struct se_cmd *cmd) 4090c66ac9dbSNicholas Bellinger { 4091d977f437SChristoph Hellwig struct se_device *dev = cmd->se_dev; 4092de103c93SChristoph Hellwig sense_reason_t ret; 4093d977f437SChristoph Hellwig 4094d977f437SChristoph Hellwig if (!cmd->se_sess) 4095c66ac9dbSNicholas Bellinger return 0; 4096d977f437SChristoph Hellwig if (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE) 4097c66ac9dbSNicholas Bellinger return 0; 4098b49d6f78SDavid Disseldorp if (!dev->dev_attrib.emulate_pr) 4099b49d6f78SDavid Disseldorp return 0; 41004ec5bf0eSBryant G. Ly if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 4101d977f437SChristoph Hellwig return 0; 4102c66ac9dbSNicholas Bellinger 4103d977f437SChristoph Hellwig spin_lock(&dev->dev_reservation_lock); 4104d977f437SChristoph Hellwig if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 4105d977f437SChristoph Hellwig ret = target_scsi2_reservation_check(cmd); 4106d977f437SChristoph Hellwig else 4107d977f437SChristoph Hellwig ret = target_scsi3_pr_reservation_check(cmd); 4108d977f437SChristoph Hellwig spin_unlock(&dev->dev_reservation_lock); 41090fd97ccfSChristoph Hellwig 4110d977f437SChristoph Hellwig return ret; 4111c66ac9dbSNicholas Bellinger } 4112