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> 32ba929992SBart Van Assche #include <scsi/scsi_proto.h> 33c66ac9dbSNicholas Bellinger #include <asm/unaligned.h> 34c66ac9dbSNicholas Bellinger 35c66ac9dbSNicholas Bellinger #include <target/target_core_base.h> 36c4795fb2SChristoph Hellwig #include <target/target_core_backend.h> 37c4795fb2SChristoph Hellwig #include <target/target_core_fabric.h> 38c66ac9dbSNicholas Bellinger 39e26d99aeSChristoph Hellwig #include "target_core_internal.h" 40c66ac9dbSNicholas Bellinger #include "target_core_pr.h" 41c66ac9dbSNicholas Bellinger #include "target_core_ua.h" 42c66ac9dbSNicholas Bellinger 43c66ac9dbSNicholas Bellinger /* 44c66ac9dbSNicholas Bellinger * Used for Specify Initiator Ports Capable Bit (SPEC_I_PT) 45c66ac9dbSNicholas Bellinger */ 46c66ac9dbSNicholas Bellinger struct pr_transport_id_holder { 47c66ac9dbSNicholas Bellinger struct t10_pr_registration *dest_pr_reg; 48c66ac9dbSNicholas Bellinger struct se_portal_group *dest_tpg; 49c66ac9dbSNicholas Bellinger struct se_node_acl *dest_node_acl; 50c66ac9dbSNicholas Bellinger struct se_dev_entry *dest_se_deve; 51c66ac9dbSNicholas Bellinger struct list_head dest_list; 52c66ac9dbSNicholas Bellinger }; 53c66ac9dbSNicholas Bellinger 54d2843c17SAndy Grover void core_pr_dump_initiator_port( 55c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 56c66ac9dbSNicholas Bellinger char *buf, 57c66ac9dbSNicholas Bellinger u32 size) 58c66ac9dbSNicholas Bellinger { 596708bb27SAndy Grover if (!pr_reg->isid_present_at_reg) 60d2843c17SAndy Grover buf[0] = '\0'; 61c66ac9dbSNicholas Bellinger 62d2843c17SAndy Grover snprintf(buf, size, ",i,0x%s", pr_reg->pr_reg_isid); 63c66ac9dbSNicholas Bellinger } 64c66ac9dbSNicholas Bellinger 6533ce6a87SAndy Grover enum register_type { 6633ce6a87SAndy Grover REGISTER, 6733ce6a87SAndy Grover REGISTER_AND_IGNORE_EXISTING_KEY, 6833ce6a87SAndy Grover REGISTER_AND_MOVE, 6933ce6a87SAndy Grover }; 7033ce6a87SAndy Grover 7133ce6a87SAndy Grover enum preempt_type { 7233ce6a87SAndy Grover PREEMPT, 7333ce6a87SAndy Grover PREEMPT_AND_ABORT, 7433ce6a87SAndy Grover }; 7533ce6a87SAndy Grover 76c66ac9dbSNicholas Bellinger static void __core_scsi3_complete_pro_release(struct se_device *, struct se_node_acl *, 776c3c9baaSNicholas Bellinger struct t10_pr_registration *, int, int); 78c66ac9dbSNicholas Bellinger 79e673dc92SIlias Tsitsimpis static int is_reservation_holder( 80e673dc92SIlias Tsitsimpis struct t10_pr_registration *pr_res_holder, 81e673dc92SIlias Tsitsimpis struct t10_pr_registration *pr_reg) 82e673dc92SIlias Tsitsimpis { 83e673dc92SIlias Tsitsimpis int pr_res_type; 84e673dc92SIlias Tsitsimpis 85e673dc92SIlias Tsitsimpis if (pr_res_holder) { 86e673dc92SIlias Tsitsimpis pr_res_type = pr_res_holder->pr_res_type; 87e673dc92SIlias Tsitsimpis 88e673dc92SIlias Tsitsimpis return pr_res_holder == pr_reg || 89e673dc92SIlias Tsitsimpis pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG || 90e673dc92SIlias Tsitsimpis pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG; 91e673dc92SIlias Tsitsimpis } 92e673dc92SIlias Tsitsimpis return 0; 93e673dc92SIlias Tsitsimpis } 94e673dc92SIlias Tsitsimpis 95de103c93SChristoph Hellwig static sense_reason_t 96de103c93SChristoph Hellwig target_scsi2_reservation_check(struct se_cmd *cmd) 97c66ac9dbSNicholas Bellinger { 98d977f437SChristoph Hellwig struct se_device *dev = cmd->se_dev; 99d977f437SChristoph Hellwig struct se_session *sess = cmd->se_sess; 100d977f437SChristoph Hellwig 101d977f437SChristoph Hellwig switch (cmd->t_task_cdb[0]) { 102c66ac9dbSNicholas Bellinger case INQUIRY: 103c66ac9dbSNicholas Bellinger case RELEASE: 104c66ac9dbSNicholas Bellinger case RELEASE_10: 105c66ac9dbSNicholas Bellinger return 0; 106c66ac9dbSNicholas Bellinger default: 107d977f437SChristoph Hellwig break; 108c66ac9dbSNicholas Bellinger } 109c66ac9dbSNicholas Bellinger 110d977f437SChristoph Hellwig if (!dev->dev_reserved_node_acl || !sess) 111c66ac9dbSNicholas Bellinger return 0; 112c66ac9dbSNicholas Bellinger 113d977f437SChristoph Hellwig if (dev->dev_reserved_node_acl != sess->se_node_acl) 114de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 115c66ac9dbSNicholas Bellinger 116d977f437SChristoph Hellwig if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS_WITH_ISID) { 117d977f437SChristoph Hellwig if (dev->dev_res_bin_isid != sess->sess_bin_isid) 118de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 119d977f437SChristoph Hellwig } 120d977f437SChristoph Hellwig 121d977f437SChristoph Hellwig return 0; 122c66ac9dbSNicholas Bellinger } 123c66ac9dbSNicholas Bellinger 124eacac00cSChristoph Hellwig static struct t10_pr_registration *core_scsi3_locate_pr_reg(struct se_device *, 125eacac00cSChristoph Hellwig struct se_node_acl *, struct se_session *); 126eacac00cSChristoph Hellwig static void core_scsi3_put_pr_reg(struct t10_pr_registration *); 127eacac00cSChristoph Hellwig 128087a03b3SNicholas Bellinger static int target_check_scsi2_reservation_conflict(struct se_cmd *cmd) 129eacac00cSChristoph Hellwig { 130eacac00cSChristoph Hellwig struct se_session *se_sess = cmd->se_sess; 1310fd97ccfSChristoph Hellwig struct se_device *dev = cmd->se_dev; 132eacac00cSChristoph Hellwig struct t10_pr_registration *pr_reg; 1330fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 134eacac00cSChristoph Hellwig int conflict = 0; 135eacac00cSChristoph Hellwig 136eacac00cSChristoph Hellwig pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, 137eacac00cSChristoph Hellwig se_sess); 138eacac00cSChristoph Hellwig if (pr_reg) { 139eacac00cSChristoph Hellwig /* 140eacac00cSChristoph Hellwig * From spc4r17 5.7.3 Exceptions to SPC-2 RESERVE and RELEASE 141eacac00cSChristoph Hellwig * behavior 142eacac00cSChristoph Hellwig * 143eacac00cSChristoph Hellwig * A RESERVE(6) or RESERVE(10) command shall complete with GOOD 144eacac00cSChristoph Hellwig * status, but no reservation shall be established and the 145eacac00cSChristoph Hellwig * persistent reservation shall not be changed, if the command 146eacac00cSChristoph Hellwig * is received from a) and b) below. 147eacac00cSChristoph Hellwig * 148eacac00cSChristoph Hellwig * A RELEASE(6) or RELEASE(10) command shall complete with GOOD 149eacac00cSChristoph Hellwig * status, but the persistent reservation shall not be released, 150eacac00cSChristoph Hellwig * if the command is received from a) and b) 151eacac00cSChristoph Hellwig * 152eacac00cSChristoph Hellwig * a) An I_T nexus that is a persistent reservation holder; or 153eacac00cSChristoph Hellwig * b) An I_T nexus that is registered if a registrants only or 154eacac00cSChristoph Hellwig * all registrants type persistent reservation is present. 155eacac00cSChristoph Hellwig * 156eacac00cSChristoph Hellwig * In all other cases, a RESERVE(6) command, RESERVE(10) command, 157eacac00cSChristoph Hellwig * RELEASE(6) command, or RELEASE(10) command shall be processed 158eacac00cSChristoph Hellwig * as defined in SPC-2. 159eacac00cSChristoph Hellwig */ 160eacac00cSChristoph Hellwig if (pr_reg->pr_res_holder) { 161eacac00cSChristoph Hellwig core_scsi3_put_pr_reg(pr_reg); 162087a03b3SNicholas Bellinger return 1; 163eacac00cSChristoph Hellwig } 164eacac00cSChristoph Hellwig if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY) || 165eacac00cSChristoph Hellwig (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) || 166eacac00cSChristoph Hellwig (pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 167eacac00cSChristoph Hellwig (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { 168eacac00cSChristoph Hellwig core_scsi3_put_pr_reg(pr_reg); 169087a03b3SNicholas Bellinger return 1; 170eacac00cSChristoph Hellwig } 171eacac00cSChristoph Hellwig core_scsi3_put_pr_reg(pr_reg); 172eacac00cSChristoph Hellwig conflict = 1; 173eacac00cSChristoph Hellwig } else { 174eacac00cSChristoph Hellwig /* 175eacac00cSChristoph Hellwig * Following spc2r20 5.5.1 Reservations overview: 176eacac00cSChristoph Hellwig * 177eacac00cSChristoph Hellwig * If a logical unit has executed a PERSISTENT RESERVE OUT 178eacac00cSChristoph Hellwig * command with the REGISTER or the REGISTER AND IGNORE 179eacac00cSChristoph Hellwig * EXISTING KEY service action and is still registered by any 180eacac00cSChristoph Hellwig * initiator, all RESERVE commands and all RELEASE commands 181eacac00cSChristoph Hellwig * regardless of initiator shall conflict and shall terminate 182eacac00cSChristoph Hellwig * with a RESERVATION CONFLICT status. 183eacac00cSChristoph Hellwig */ 184eacac00cSChristoph Hellwig spin_lock(&pr_tmpl->registration_lock); 185eacac00cSChristoph Hellwig conflict = (list_empty(&pr_tmpl->registration_list)) ? 0 : 1; 186eacac00cSChristoph Hellwig spin_unlock(&pr_tmpl->registration_lock); 187eacac00cSChristoph Hellwig } 188eacac00cSChristoph Hellwig 189eacac00cSChristoph Hellwig if (conflict) { 190eacac00cSChristoph Hellwig pr_err("Received legacy SPC-2 RESERVE/RELEASE" 191eacac00cSChristoph Hellwig " while active SPC-3 registrations exist," 192eacac00cSChristoph Hellwig " returning RESERVATION_CONFLICT\n"); 193087a03b3SNicholas Bellinger return -EBUSY; 194eacac00cSChristoph Hellwig } 195eacac00cSChristoph Hellwig 196087a03b3SNicholas Bellinger return 0; 197eacac00cSChristoph Hellwig } 198eacac00cSChristoph Hellwig 199de103c93SChristoph Hellwig sense_reason_t 200de103c93SChristoph Hellwig target_scsi2_reservation_release(struct se_cmd *cmd) 201c66ac9dbSNicholas Bellinger { 202c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 203c66ac9dbSNicholas Bellinger struct se_session *sess = cmd->se_sess; 204609234e3SWei Yongjun struct se_portal_group *tpg; 205de103c93SChristoph Hellwig int rc; 206c66ac9dbSNicholas Bellinger 207609234e3SWei Yongjun if (!sess || !sess->se_tpg) 208d29a5b6aSChristoph Hellwig goto out; 209087a03b3SNicholas Bellinger rc = target_check_scsi2_reservation_conflict(cmd); 210087a03b3SNicholas Bellinger if (rc == 1) 211d29a5b6aSChristoph Hellwig goto out; 212de103c93SChristoph Hellwig if (rc < 0) 213de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 214c66ac9dbSNicholas Bellinger 215c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 216d29a5b6aSChristoph Hellwig if (!dev->dev_reserved_node_acl || !sess) 217d29a5b6aSChristoph Hellwig goto out_unlock; 218c66ac9dbSNicholas Bellinger 219d29a5b6aSChristoph Hellwig if (dev->dev_reserved_node_acl != sess->se_node_acl) 220d29a5b6aSChristoph Hellwig goto out_unlock; 221d29a5b6aSChristoph Hellwig 222edc318d9SBernhard Kohl if (dev->dev_res_bin_isid != sess->sess_bin_isid) 223edc318d9SBernhard Kohl goto out_unlock; 224edc318d9SBernhard Kohl 225c66ac9dbSNicholas Bellinger dev->dev_reserved_node_acl = NULL; 2260fd97ccfSChristoph Hellwig dev->dev_reservation_flags &= ~DRF_SPC2_RESERVATIONS; 2270fd97ccfSChristoph Hellwig if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS_WITH_ISID) { 228c66ac9dbSNicholas Bellinger dev->dev_res_bin_isid = 0; 2290fd97ccfSChristoph Hellwig dev->dev_reservation_flags &= ~DRF_SPC2_RESERVATIONS_WITH_ISID; 230c66ac9dbSNicholas Bellinger } 231609234e3SWei Yongjun tpg = sess->se_tpg; 232f2d30680SHannes Reinecke pr_debug("SCSI-2 Released reservation for %s LUN: %llu ->" 233f2d30680SHannes Reinecke " MAPPED LUN: %llu for %s\n", 234f2d30680SHannes Reinecke tpg->se_tpg_tfo->get_fabric_name(), 23529a05deeSNicholas Bellinger cmd->se_lun->unpacked_lun, cmd->orig_fe_lun, 236c66ac9dbSNicholas Bellinger sess->se_node_acl->initiatorname); 237c66ac9dbSNicholas Bellinger 238d29a5b6aSChristoph Hellwig out_unlock: 239d29a5b6aSChristoph Hellwig spin_unlock(&dev->dev_reservation_lock); 240d29a5b6aSChristoph Hellwig out: 2416bb35e00SChristoph Hellwig target_complete_cmd(cmd, GOOD); 242de103c93SChristoph Hellwig return 0; 243c66ac9dbSNicholas Bellinger } 244c66ac9dbSNicholas Bellinger 245de103c93SChristoph Hellwig sense_reason_t 246de103c93SChristoph Hellwig target_scsi2_reservation_reserve(struct se_cmd *cmd) 247c66ac9dbSNicholas Bellinger { 248c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 249c66ac9dbSNicholas Bellinger struct se_session *sess = cmd->se_sess; 250609234e3SWei Yongjun struct se_portal_group *tpg; 251de103c93SChristoph Hellwig sense_reason_t ret = 0; 252de103c93SChristoph Hellwig int rc; 253c66ac9dbSNicholas Bellinger 254a1d8b49aSAndy Grover if ((cmd->t_task_cdb[1] & 0x01) && 255a1d8b49aSAndy Grover (cmd->t_task_cdb[1] & 0x02)) { 2566708bb27SAndy Grover pr_err("LongIO and Obselete Bits set, returning" 257c66ac9dbSNicholas Bellinger " ILLEGAL_REQUEST\n"); 258de103c93SChristoph Hellwig return TCM_UNSUPPORTED_SCSI_OPCODE; 259c66ac9dbSNicholas Bellinger } 260c66ac9dbSNicholas Bellinger /* 261c66ac9dbSNicholas Bellinger * This is currently the case for target_core_mod passthrough struct se_cmd 262c66ac9dbSNicholas Bellinger * ops 263c66ac9dbSNicholas Bellinger */ 264609234e3SWei Yongjun if (!sess || !sess->se_tpg) 265d29a5b6aSChristoph Hellwig goto out; 266087a03b3SNicholas Bellinger rc = target_check_scsi2_reservation_conflict(cmd); 267087a03b3SNicholas Bellinger if (rc == 1) 268d29a5b6aSChristoph Hellwig goto out; 269c66ac9dbSNicholas Bellinger 270de103c93SChristoph Hellwig if (rc < 0) 271de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 272de103c93SChristoph Hellwig 273609234e3SWei Yongjun tpg = sess->se_tpg; 274c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 275c66ac9dbSNicholas Bellinger if (dev->dev_reserved_node_acl && 276c66ac9dbSNicholas Bellinger (dev->dev_reserved_node_acl != sess->se_node_acl)) { 2776708bb27SAndy Grover pr_err("SCSI-2 RESERVATION CONFLIFT for %s fabric\n", 278e3d6f909SAndy Grover tpg->se_tpg_tfo->get_fabric_name()); 279f2d30680SHannes Reinecke pr_err("Original reserver LUN: %llu %s\n", 280e3d6f909SAndy Grover cmd->se_lun->unpacked_lun, 281c66ac9dbSNicholas Bellinger dev->dev_reserved_node_acl->initiatorname); 282f2d30680SHannes Reinecke pr_err("Current attempt - LUN: %llu -> MAPPED LUN: %llu" 283e3d6f909SAndy Grover " from %s \n", cmd->se_lun->unpacked_lun, 28429a05deeSNicholas Bellinger cmd->orig_fe_lun, 285c66ac9dbSNicholas Bellinger sess->se_node_acl->initiatorname); 286de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 287d29a5b6aSChristoph Hellwig goto out_unlock; 288c66ac9dbSNicholas Bellinger } 289c66ac9dbSNicholas Bellinger 290c66ac9dbSNicholas Bellinger dev->dev_reserved_node_acl = sess->se_node_acl; 2910fd97ccfSChristoph Hellwig dev->dev_reservation_flags |= DRF_SPC2_RESERVATIONS; 292c66ac9dbSNicholas Bellinger if (sess->sess_bin_isid != 0) { 293c66ac9dbSNicholas Bellinger dev->dev_res_bin_isid = sess->sess_bin_isid; 2940fd97ccfSChristoph Hellwig dev->dev_reservation_flags |= DRF_SPC2_RESERVATIONS_WITH_ISID; 295c66ac9dbSNicholas Bellinger } 296f2d30680SHannes Reinecke pr_debug("SCSI-2 Reserved %s LUN: %llu -> MAPPED LUN: %llu" 297e3d6f909SAndy Grover " for %s\n", tpg->se_tpg_tfo->get_fabric_name(), 29829a05deeSNicholas Bellinger cmd->se_lun->unpacked_lun, cmd->orig_fe_lun, 299c66ac9dbSNicholas Bellinger sess->se_node_acl->initiatorname); 300c66ac9dbSNicholas Bellinger 301d29a5b6aSChristoph Hellwig out_unlock: 302d29a5b6aSChristoph Hellwig spin_unlock(&dev->dev_reservation_lock); 303d29a5b6aSChristoph Hellwig out: 3046bb35e00SChristoph Hellwig if (!ret) 3056bb35e00SChristoph Hellwig target_complete_cmd(cmd, GOOD); 306d29a5b6aSChristoph Hellwig return ret; 307c66ac9dbSNicholas Bellinger } 308c66ac9dbSNicholas Bellinger 309c66ac9dbSNicholas Bellinger 310c66ac9dbSNicholas Bellinger /* 311c66ac9dbSNicholas Bellinger * Begin SPC-3/SPC-4 Persistent Reservations emulation support 312c66ac9dbSNicholas Bellinger * 313c66ac9dbSNicholas Bellinger * This function is called by those initiator ports who are *NOT* 314c66ac9dbSNicholas Bellinger * the active PR reservation holder when a reservation is present. 315c66ac9dbSNicholas Bellinger */ 3169fcb57f3SChristoph Hellwig static int core_scsi3_pr_seq_non_holder(struct se_cmd *cmd, u32 pr_reg_type, 3179fcb57f3SChristoph Hellwig bool isid_mismatch) 318c66ac9dbSNicholas Bellinger { 319d977f437SChristoph Hellwig unsigned char *cdb = cmd->t_task_cdb; 320e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 32129a05deeSNicholas Bellinger struct se_node_acl *nacl = se_sess->se_node_acl; 3229fcb57f3SChristoph Hellwig int other_cdb = 0; 323c66ac9dbSNicholas Bellinger int registered_nexus = 0, ret = 1; /* Conflict by default */ 324c66ac9dbSNicholas Bellinger int all_reg = 0, reg_only = 0; /* ALL_REG, REG_ONLY */ 325c66ac9dbSNicholas Bellinger int we = 0; /* Write Exclusive */ 326c66ac9dbSNicholas Bellinger int legacy = 0; /* Act like a legacy device and return 327c66ac9dbSNicholas Bellinger * RESERVATION CONFLICT on some CDBs */ 328c66ac9dbSNicholas Bellinger 3299fcb57f3SChristoph Hellwig if (isid_mismatch) { 3309fcb57f3SChristoph Hellwig registered_nexus = 0; 3319fcb57f3SChristoph Hellwig } else { 3329fcb57f3SChristoph Hellwig struct se_dev_entry *se_deve; 333c66ac9dbSNicholas Bellinger 33429a05deeSNicholas Bellinger rcu_read_lock(); 33529a05deeSNicholas Bellinger se_deve = target_nacl_find_deve(nacl, cmd->orig_fe_lun); 33680bfdfa9SNicholas Bellinger if (se_deve) 3379fcb57f3SChristoph Hellwig registered_nexus = test_bit(DEF_PR_REG_ACTIVE, 3389fcb57f3SChristoph Hellwig &se_deve->deve_flags); 33980bfdfa9SNicholas Bellinger rcu_read_unlock(); 3409fcb57f3SChristoph Hellwig } 341c66ac9dbSNicholas Bellinger 342c66ac9dbSNicholas Bellinger switch (pr_reg_type) { 343c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE: 344c66ac9dbSNicholas Bellinger we = 1; 345c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS: 346c66ac9dbSNicholas Bellinger /* 347c66ac9dbSNicholas Bellinger * Some commands are only allowed for the persistent reservation 348c66ac9dbSNicholas Bellinger * holder. 349c66ac9dbSNicholas Bellinger */ 350c66ac9dbSNicholas Bellinger break; 351c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: 352c66ac9dbSNicholas Bellinger we = 1; 353c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: 354c66ac9dbSNicholas Bellinger /* 355c66ac9dbSNicholas Bellinger * Some commands are only allowed for registered I_T Nexuses. 356c66ac9dbSNicholas Bellinger */ 357c66ac9dbSNicholas Bellinger reg_only = 1; 358c66ac9dbSNicholas Bellinger break; 359c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: 360c66ac9dbSNicholas Bellinger we = 1; 361c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: 362c66ac9dbSNicholas Bellinger /* 363c66ac9dbSNicholas Bellinger * Each registered I_T Nexus is a reservation holder. 364c66ac9dbSNicholas Bellinger */ 365c66ac9dbSNicholas Bellinger all_reg = 1; 366c66ac9dbSNicholas Bellinger break; 367c66ac9dbSNicholas Bellinger default: 368e3d6f909SAndy Grover return -EINVAL; 369c66ac9dbSNicholas Bellinger } 370c66ac9dbSNicholas Bellinger /* 371c66ac9dbSNicholas Bellinger * Referenced from spc4r17 table 45 for *NON* PR holder access 372c66ac9dbSNicholas Bellinger */ 373c66ac9dbSNicholas Bellinger switch (cdb[0]) { 374c66ac9dbSNicholas Bellinger case SECURITY_PROTOCOL_IN: 375c66ac9dbSNicholas Bellinger if (registered_nexus) 376c66ac9dbSNicholas Bellinger return 0; 377c66ac9dbSNicholas Bellinger ret = (we) ? 0 : 1; 378c66ac9dbSNicholas Bellinger break; 379c66ac9dbSNicholas Bellinger case MODE_SENSE: 380c66ac9dbSNicholas Bellinger case MODE_SENSE_10: 381c66ac9dbSNicholas Bellinger case READ_ATTRIBUTE: 382c66ac9dbSNicholas Bellinger case READ_BUFFER: 383c66ac9dbSNicholas Bellinger case RECEIVE_DIAGNOSTIC: 384c66ac9dbSNicholas Bellinger if (legacy) { 385c66ac9dbSNicholas Bellinger ret = 1; 386c66ac9dbSNicholas Bellinger break; 387c66ac9dbSNicholas Bellinger } 388c66ac9dbSNicholas Bellinger if (registered_nexus) { 389c66ac9dbSNicholas Bellinger ret = 0; 390c66ac9dbSNicholas Bellinger break; 391c66ac9dbSNicholas Bellinger } 392c66ac9dbSNicholas Bellinger ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ 393c66ac9dbSNicholas Bellinger break; 394c66ac9dbSNicholas Bellinger case PERSISTENT_RESERVE_OUT: 395c66ac9dbSNicholas Bellinger /* 396c66ac9dbSNicholas Bellinger * This follows PERSISTENT_RESERVE_OUT service actions that 397c66ac9dbSNicholas Bellinger * are allowed in the presence of various reservations. 398c66ac9dbSNicholas Bellinger * See spc4r17, table 46 399c66ac9dbSNicholas Bellinger */ 400c66ac9dbSNicholas Bellinger switch (cdb[1] & 0x1f) { 401c66ac9dbSNicholas Bellinger case PRO_CLEAR: 402c66ac9dbSNicholas Bellinger case PRO_PREEMPT: 403c66ac9dbSNicholas Bellinger case PRO_PREEMPT_AND_ABORT: 404c66ac9dbSNicholas Bellinger ret = (registered_nexus) ? 0 : 1; 405c66ac9dbSNicholas Bellinger break; 406c66ac9dbSNicholas Bellinger case PRO_REGISTER: 407c66ac9dbSNicholas Bellinger case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: 408c66ac9dbSNicholas Bellinger ret = 0; 409c66ac9dbSNicholas Bellinger break; 410c66ac9dbSNicholas Bellinger case PRO_REGISTER_AND_MOVE: 411c66ac9dbSNicholas Bellinger case PRO_RESERVE: 412c66ac9dbSNicholas Bellinger ret = 1; 413c66ac9dbSNicholas Bellinger break; 414c66ac9dbSNicholas Bellinger case PRO_RELEASE: 415c66ac9dbSNicholas Bellinger ret = (registered_nexus) ? 0 : 1; 416c66ac9dbSNicholas Bellinger break; 417c66ac9dbSNicholas Bellinger default: 4186708bb27SAndy Grover pr_err("Unknown PERSISTENT_RESERVE_OUT service" 419c66ac9dbSNicholas Bellinger " action: 0x%02x\n", cdb[1] & 0x1f); 420e3d6f909SAndy Grover return -EINVAL; 421c66ac9dbSNicholas Bellinger } 422c66ac9dbSNicholas Bellinger break; 423c66ac9dbSNicholas Bellinger case RELEASE: 424c66ac9dbSNicholas Bellinger case RELEASE_10: 425eacac00cSChristoph Hellwig /* Handled by CRH=1 in target_scsi2_reservation_release() */ 426c66ac9dbSNicholas Bellinger ret = 0; 427c66ac9dbSNicholas Bellinger break; 428c66ac9dbSNicholas Bellinger case RESERVE: 429c66ac9dbSNicholas Bellinger case RESERVE_10: 430eacac00cSChristoph Hellwig /* Handled by CRH=1 in target_scsi2_reservation_reserve() */ 431c66ac9dbSNicholas Bellinger ret = 0; 432c66ac9dbSNicholas Bellinger break; 433c66ac9dbSNicholas Bellinger case TEST_UNIT_READY: 434c66ac9dbSNicholas Bellinger ret = (legacy) ? 1 : 0; /* Conflict for legacy */ 435c66ac9dbSNicholas Bellinger break; 436c66ac9dbSNicholas Bellinger case MAINTENANCE_IN: 437c66ac9dbSNicholas Bellinger switch (cdb[1] & 0x1f) { 438c66ac9dbSNicholas Bellinger case MI_MANAGEMENT_PROTOCOL_IN: 439c66ac9dbSNicholas Bellinger if (registered_nexus) { 440c66ac9dbSNicholas Bellinger ret = 0; 441c66ac9dbSNicholas Bellinger break; 442c66ac9dbSNicholas Bellinger } 443c66ac9dbSNicholas Bellinger ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ 444c66ac9dbSNicholas Bellinger break; 445c66ac9dbSNicholas Bellinger case MI_REPORT_SUPPORTED_OPERATION_CODES: 446c66ac9dbSNicholas Bellinger case MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS: 447c66ac9dbSNicholas Bellinger if (legacy) { 448c66ac9dbSNicholas Bellinger ret = 1; 449c66ac9dbSNicholas Bellinger break; 450c66ac9dbSNicholas Bellinger } 451c66ac9dbSNicholas Bellinger if (registered_nexus) { 452c66ac9dbSNicholas Bellinger ret = 0; 453c66ac9dbSNicholas Bellinger break; 454c66ac9dbSNicholas Bellinger } 455c66ac9dbSNicholas Bellinger ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ 456c66ac9dbSNicholas Bellinger break; 457c66ac9dbSNicholas Bellinger case MI_REPORT_ALIASES: 458c66ac9dbSNicholas Bellinger case MI_REPORT_IDENTIFYING_INFORMATION: 459c66ac9dbSNicholas Bellinger case MI_REPORT_PRIORITY: 460c66ac9dbSNicholas Bellinger case MI_REPORT_TARGET_PGS: 461c66ac9dbSNicholas Bellinger case MI_REPORT_TIMESTAMP: 462c66ac9dbSNicholas Bellinger ret = 0; /* Allowed */ 463c66ac9dbSNicholas Bellinger break; 464c66ac9dbSNicholas Bellinger default: 4656708bb27SAndy Grover pr_err("Unknown MI Service Action: 0x%02x\n", 466c66ac9dbSNicholas Bellinger (cdb[1] & 0x1f)); 467e3d6f909SAndy Grover return -EINVAL; 468c66ac9dbSNicholas Bellinger } 469c66ac9dbSNicholas Bellinger break; 470c66ac9dbSNicholas Bellinger case ACCESS_CONTROL_IN: 471c66ac9dbSNicholas Bellinger case ACCESS_CONTROL_OUT: 472c66ac9dbSNicholas Bellinger case INQUIRY: 473c66ac9dbSNicholas Bellinger case LOG_SENSE: 47485686f69SHannes Reinecke case SERVICE_ACTION_IN_12: 475c66ac9dbSNicholas Bellinger case REPORT_LUNS: 476c66ac9dbSNicholas Bellinger case REQUEST_SENSE: 4776816966aSMarco Sanvido case PERSISTENT_RESERVE_IN: 478c66ac9dbSNicholas Bellinger ret = 0; /*/ Allowed CDBs */ 479c66ac9dbSNicholas Bellinger break; 480c66ac9dbSNicholas Bellinger default: 481c66ac9dbSNicholas Bellinger other_cdb = 1; 482c66ac9dbSNicholas Bellinger break; 483c66ac9dbSNicholas Bellinger } 484c66ac9dbSNicholas Bellinger /* 48525985edcSLucas De Marchi * Case where the CDB is explicitly allowed in the above switch 486c66ac9dbSNicholas Bellinger * statement. 487c66ac9dbSNicholas Bellinger */ 4886708bb27SAndy Grover if (!ret && !other_cdb) { 489125d0119SHannes Reinecke pr_debug("Allowing explicit CDB: 0x%02x for %s" 490c66ac9dbSNicholas Bellinger " reservation holder\n", cdb[0], 491c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 4928b1e1244SAndy Grover 493c66ac9dbSNicholas Bellinger return ret; 494c66ac9dbSNicholas Bellinger } 495c66ac9dbSNicholas Bellinger /* 496c66ac9dbSNicholas Bellinger * Check if write exclusive initiator ports *NOT* holding the 497c66ac9dbSNicholas Bellinger * WRITE_EXCLUSIVE_* reservation. 498c66ac9dbSNicholas Bellinger */ 499ee1b1b9cSAndy Grover if (we && !registered_nexus) { 500c66ac9dbSNicholas Bellinger if (cmd->data_direction == DMA_TO_DEVICE) { 501c66ac9dbSNicholas Bellinger /* 502c66ac9dbSNicholas Bellinger * Conflict for write exclusive 503c66ac9dbSNicholas Bellinger */ 5046708bb27SAndy Grover pr_debug("%s Conflict for unregistered nexus" 505c66ac9dbSNicholas Bellinger " %s CDB: 0x%02x to %s reservation\n", 506c66ac9dbSNicholas Bellinger transport_dump_cmd_direction(cmd), 507c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, cdb[0], 508c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 509c66ac9dbSNicholas Bellinger return 1; 510c66ac9dbSNicholas Bellinger } else { 511c66ac9dbSNicholas Bellinger /* 512c66ac9dbSNicholas Bellinger * Allow non WRITE CDBs for all Write Exclusive 513c66ac9dbSNicholas Bellinger * PR TYPEs to pass for registered and 514c66ac9dbSNicholas Bellinger * non-registered_nexuxes NOT holding the reservation. 515c66ac9dbSNicholas Bellinger * 516c66ac9dbSNicholas Bellinger * We only make noise for the unregisterd nexuses, 517c66ac9dbSNicholas Bellinger * as we expect registered non-reservation holding 518c66ac9dbSNicholas Bellinger * nexuses to issue CDBs. 519c66ac9dbSNicholas Bellinger */ 5208b1e1244SAndy Grover 5216708bb27SAndy Grover if (!registered_nexus) { 522125d0119SHannes Reinecke pr_debug("Allowing implicit CDB: 0x%02x" 523c66ac9dbSNicholas Bellinger " for %s reservation on unregistered" 524c66ac9dbSNicholas Bellinger " nexus\n", cdb[0], 525c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 526c66ac9dbSNicholas Bellinger } 5278b1e1244SAndy Grover 528c66ac9dbSNicholas Bellinger return 0; 529c66ac9dbSNicholas Bellinger } 530c66ac9dbSNicholas Bellinger } else if ((reg_only) || (all_reg)) { 531c66ac9dbSNicholas Bellinger if (registered_nexus) { 532c66ac9dbSNicholas Bellinger /* 533c66ac9dbSNicholas Bellinger * For PR_*_REG_ONLY and PR_*_ALL_REG reservations, 534c66ac9dbSNicholas Bellinger * allow commands from registered nexuses. 535c66ac9dbSNicholas Bellinger */ 5368b1e1244SAndy Grover 537125d0119SHannes Reinecke pr_debug("Allowing implicit CDB: 0x%02x for %s" 538c66ac9dbSNicholas Bellinger " reservation\n", cdb[0], 539c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 5408b1e1244SAndy Grover 541c66ac9dbSNicholas Bellinger return 0; 542c66ac9dbSNicholas Bellinger } 5431ecc7586SLee Duncan } else if (we && registered_nexus) { 5441ecc7586SLee Duncan /* 5451ecc7586SLee Duncan * Reads are allowed for Write Exclusive locks 5461ecc7586SLee Duncan * from all registrants. 5471ecc7586SLee Duncan */ 5481ecc7586SLee Duncan if (cmd->data_direction == DMA_FROM_DEVICE) { 5491ecc7586SLee Duncan pr_debug("Allowing READ CDB: 0x%02x for %s" 5501ecc7586SLee Duncan " reservation\n", cdb[0], 5511ecc7586SLee Duncan core_scsi3_pr_dump_type(pr_reg_type)); 5521ecc7586SLee Duncan 5531ecc7586SLee Duncan return 0; 5541ecc7586SLee Duncan } 555c66ac9dbSNicholas Bellinger } 5566708bb27SAndy Grover pr_debug("%s Conflict for %sregistered nexus %s CDB: 0x%2x" 557c66ac9dbSNicholas Bellinger " for %s reservation\n", transport_dump_cmd_direction(cmd), 558c66ac9dbSNicholas Bellinger (registered_nexus) ? "" : "un", 559c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, cdb[0], 560c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 561c66ac9dbSNicholas Bellinger 562c66ac9dbSNicholas Bellinger return 1; /* Conflict by default */ 563c66ac9dbSNicholas Bellinger } 564c66ac9dbSNicholas Bellinger 565de103c93SChristoph Hellwig static sense_reason_t 566de103c93SChristoph Hellwig target_scsi3_pr_reservation_check(struct se_cmd *cmd) 567d977f437SChristoph Hellwig { 568d977f437SChristoph Hellwig struct se_device *dev = cmd->se_dev; 569d977f437SChristoph Hellwig struct se_session *sess = cmd->se_sess; 570d977f437SChristoph Hellwig u32 pr_reg_type; 5719fcb57f3SChristoph Hellwig bool isid_mismatch = false; 572d977f437SChristoph Hellwig 573d977f437SChristoph Hellwig if (!dev->dev_pr_res_holder) 574d977f437SChristoph Hellwig return 0; 575d977f437SChristoph Hellwig 576d977f437SChristoph Hellwig pr_reg_type = dev->dev_pr_res_holder->pr_res_type; 577d977f437SChristoph Hellwig cmd->pr_res_key = dev->dev_pr_res_holder->pr_res_key; 578d977f437SChristoph Hellwig if (dev->dev_pr_res_holder->pr_reg_nacl != sess->se_node_acl) 579d977f437SChristoph Hellwig goto check_nonholder; 580d977f437SChristoph Hellwig 581d977f437SChristoph Hellwig if (dev->dev_pr_res_holder->isid_present_at_reg) { 582d977f437SChristoph Hellwig if (dev->dev_pr_res_holder->pr_reg_bin_isid != 583d977f437SChristoph Hellwig sess->sess_bin_isid) { 5849fcb57f3SChristoph Hellwig isid_mismatch = true; 585d977f437SChristoph Hellwig goto check_nonholder; 586d977f437SChristoph Hellwig } 587d977f437SChristoph Hellwig } 588d977f437SChristoph Hellwig 589d977f437SChristoph Hellwig return 0; 590d977f437SChristoph Hellwig 591d977f437SChristoph Hellwig check_nonholder: 5929fcb57f3SChristoph Hellwig if (core_scsi3_pr_seq_non_holder(cmd, pr_reg_type, isid_mismatch)) 593de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 594d977f437SChristoph Hellwig return 0; 595d977f437SChristoph Hellwig } 596d977f437SChristoph Hellwig 597c66ac9dbSNicholas Bellinger static u32 core_scsi3_pr_generation(struct se_device *dev) 598c66ac9dbSNicholas Bellinger { 599c66ac9dbSNicholas Bellinger u32 prg; 6000fd97ccfSChristoph Hellwig 601c66ac9dbSNicholas Bellinger /* 602c66ac9dbSNicholas Bellinger * PRGeneration field shall contain the value of a 32-bit wrapping 603c66ac9dbSNicholas Bellinger * counter mainted by the device server. 604c66ac9dbSNicholas Bellinger * 605c66ac9dbSNicholas Bellinger * Note that this is done regardless of Active Persist across 606c66ac9dbSNicholas Bellinger * Target PowerLoss (APTPL) 607c66ac9dbSNicholas Bellinger * 608c66ac9dbSNicholas Bellinger * See spc4r17 section 6.3.12 READ_KEYS service action 609c66ac9dbSNicholas Bellinger */ 610c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 6110fd97ccfSChristoph Hellwig prg = dev->t10_pr.pr_generation++; 612c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 613c66ac9dbSNicholas Bellinger 614c66ac9dbSNicholas Bellinger return prg; 615c66ac9dbSNicholas Bellinger } 616c66ac9dbSNicholas Bellinger 617c66ac9dbSNicholas Bellinger static struct t10_pr_registration *__core_scsi3_do_alloc_registration( 618c66ac9dbSNicholas Bellinger struct se_device *dev, 619c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 62079dc9c9eSNicholas Bellinger struct se_lun *lun, 6213ccd6e83SNicholas Bellinger struct se_dev_entry *dest_deve, 622f2d30680SHannes Reinecke u64 mapped_lun, 623c66ac9dbSNicholas Bellinger unsigned char *isid, 624c66ac9dbSNicholas Bellinger u64 sa_res_key, 625c66ac9dbSNicholas Bellinger int all_tg_pt, 626c66ac9dbSNicholas Bellinger int aptpl) 627c66ac9dbSNicholas Bellinger { 628c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 629c66ac9dbSNicholas Bellinger 630c66ac9dbSNicholas Bellinger pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_ATOMIC); 6316708bb27SAndy Grover if (!pr_reg) { 6326708bb27SAndy Grover pr_err("Unable to allocate struct t10_pr_registration\n"); 633c66ac9dbSNicholas Bellinger return NULL; 634c66ac9dbSNicholas Bellinger } 635c66ac9dbSNicholas Bellinger 636c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_list); 637c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list); 638c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list); 639c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list); 640c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list); 641c66ac9dbSNicholas Bellinger atomic_set(&pr_reg->pr_res_holders, 0); 642c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = nacl; 6433ccd6e83SNicholas Bellinger /* 6443ccd6e83SNicholas Bellinger * For destination registrations for ALL_TG_PT=1 and SPEC_I_PT=1, 6453ccd6e83SNicholas Bellinger * the se_dev_entry->pr_ref will have been already obtained by 6463ccd6e83SNicholas Bellinger * core_get_se_deve_from_rtpi() or __core_scsi3_alloc_registration(). 6473ccd6e83SNicholas Bellinger * 6483ccd6e83SNicholas Bellinger * Otherwise, locate se_dev_entry now and obtain a reference until 6493ccd6e83SNicholas Bellinger * registration completes in __core_scsi3_add_registration(). 6503ccd6e83SNicholas Bellinger */ 6513ccd6e83SNicholas Bellinger if (dest_deve) { 6523ccd6e83SNicholas Bellinger pr_reg->pr_reg_deve = dest_deve; 6533ccd6e83SNicholas Bellinger } else { 6543ccd6e83SNicholas Bellinger rcu_read_lock(); 6553ccd6e83SNicholas Bellinger pr_reg->pr_reg_deve = target_nacl_find_deve(nacl, mapped_lun); 6563ccd6e83SNicholas Bellinger if (!pr_reg->pr_reg_deve) { 6573ccd6e83SNicholas Bellinger rcu_read_unlock(); 6583ccd6e83SNicholas Bellinger pr_err("Unable to locate PR deve %s mapped_lun: %llu\n", 6593ccd6e83SNicholas Bellinger nacl->initiatorname, mapped_lun); 6603ccd6e83SNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 6613ccd6e83SNicholas Bellinger return NULL; 6623ccd6e83SNicholas Bellinger } 6633ccd6e83SNicholas Bellinger kref_get(&pr_reg->pr_reg_deve->pr_kref); 6643ccd6e83SNicholas Bellinger rcu_read_unlock(); 6653ccd6e83SNicholas Bellinger } 66679dc9c9eSNicholas Bellinger pr_reg->pr_res_mapped_lun = mapped_lun; 66779dc9c9eSNicholas Bellinger pr_reg->pr_aptpl_target_lun = lun->unpacked_lun; 668adf653f9SChristoph Hellwig pr_reg->tg_pt_sep_rtpi = lun->lun_rtpi; 669c66ac9dbSNicholas Bellinger pr_reg->pr_res_key = sa_res_key; 670c66ac9dbSNicholas Bellinger pr_reg->pr_reg_all_tg_pt = all_tg_pt; 671c66ac9dbSNicholas Bellinger pr_reg->pr_reg_aptpl = aptpl; 672c66ac9dbSNicholas Bellinger /* 673c66ac9dbSNicholas Bellinger * If an ISID value for this SCSI Initiator Port exists, 674c66ac9dbSNicholas Bellinger * save it to the registration now. 675c66ac9dbSNicholas Bellinger */ 676c66ac9dbSNicholas Bellinger if (isid != NULL) { 677c66ac9dbSNicholas Bellinger pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid); 678c66ac9dbSNicholas Bellinger snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid); 679c66ac9dbSNicholas Bellinger pr_reg->isid_present_at_reg = 1; 680c66ac9dbSNicholas Bellinger } 681c66ac9dbSNicholas Bellinger 682c66ac9dbSNicholas Bellinger return pr_reg; 683c66ac9dbSNicholas Bellinger } 684c66ac9dbSNicholas Bellinger 685c66ac9dbSNicholas Bellinger static int core_scsi3_lunacl_depend_item(struct se_dev_entry *); 686c66ac9dbSNicholas Bellinger static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *); 687c66ac9dbSNicholas Bellinger 688c66ac9dbSNicholas Bellinger /* 689c66ac9dbSNicholas Bellinger * Function used for handling PR registrations for ALL_TG_PT=1 and ALL_TG_PT=0 690c66ac9dbSNicholas Bellinger * modes. 691c66ac9dbSNicholas Bellinger */ 692c66ac9dbSNicholas Bellinger static struct t10_pr_registration *__core_scsi3_alloc_registration( 693c66ac9dbSNicholas Bellinger struct se_device *dev, 694c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 69579dc9c9eSNicholas Bellinger struct se_lun *lun, 696c66ac9dbSNicholas Bellinger struct se_dev_entry *deve, 697f2d30680SHannes Reinecke u64 mapped_lun, 698c66ac9dbSNicholas Bellinger unsigned char *isid, 699c66ac9dbSNicholas Bellinger u64 sa_res_key, 700c66ac9dbSNicholas Bellinger int all_tg_pt, 701c66ac9dbSNicholas Bellinger int aptpl) 702c66ac9dbSNicholas Bellinger { 703c66ac9dbSNicholas Bellinger struct se_dev_entry *deve_tmp; 704c66ac9dbSNicholas Bellinger struct se_node_acl *nacl_tmp; 70579dc9c9eSNicholas Bellinger struct se_lun_acl *lacl_tmp; 706adf653f9SChristoph Hellwig struct se_lun *lun_tmp, *next, *dest_lun; 7079ac8928eSChristoph Hellwig const struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; 708c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_atp, *pr_reg_tmp, *pr_reg_tmp_safe; 709c66ac9dbSNicholas Bellinger int ret; 710c66ac9dbSNicholas Bellinger /* 711c66ac9dbSNicholas Bellinger * Create a registration for the I_T Nexus upon which the 712c66ac9dbSNicholas Bellinger * PROUT REGISTER was received. 713c66ac9dbSNicholas Bellinger */ 71479dc9c9eSNicholas Bellinger pr_reg = __core_scsi3_do_alloc_registration(dev, nacl, lun, deve, mapped_lun, 71579dc9c9eSNicholas Bellinger isid, sa_res_key, all_tg_pt, 71679dc9c9eSNicholas Bellinger aptpl); 7176708bb27SAndy Grover if (!pr_reg) 718c66ac9dbSNicholas Bellinger return NULL; 719c66ac9dbSNicholas Bellinger /* 720c66ac9dbSNicholas Bellinger * Return pointer to pr_reg for ALL_TG_PT=0 721c66ac9dbSNicholas Bellinger */ 7226708bb27SAndy Grover if (!all_tg_pt) 723c66ac9dbSNicholas Bellinger return pr_reg; 724c66ac9dbSNicholas Bellinger /* 725c66ac9dbSNicholas Bellinger * Create list of matching SCSI Initiator Port registrations 726c66ac9dbSNicholas Bellinger * for ALL_TG_PT=1 727c66ac9dbSNicholas Bellinger */ 728c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 729adf653f9SChristoph Hellwig list_for_each_entry_safe(lun_tmp, next, &dev->dev_sep_list, lun_dev_link) { 7309e37d042SNicholas Bellinger if (!percpu_ref_tryget_live(&lun_tmp->lun_ref)) 7319e37d042SNicholas Bellinger continue; 732c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 733c66ac9dbSNicholas Bellinger 7341adff1b3SNicholas Bellinger spin_lock(&lun_tmp->lun_deve_lock); 735adf653f9SChristoph Hellwig list_for_each_entry(deve_tmp, &lun_tmp->lun_deve_list, lun_link) { 736c66ac9dbSNicholas Bellinger /* 737c66ac9dbSNicholas Bellinger * This pointer will be NULL for demo mode MappedLUNs 738125d0119SHannes Reinecke * that have not been make explicit via a ConfigFS 739c66ac9dbSNicholas Bellinger * MappedLUN group for the SCSI Initiator Node ACL. 740c66ac9dbSNicholas Bellinger */ 7416708bb27SAndy Grover if (!deve_tmp->se_lun_acl) 742c66ac9dbSNicholas Bellinger continue; 743c66ac9dbSNicholas Bellinger 74479dc9c9eSNicholas Bellinger lacl_tmp = rcu_dereference_check(deve_tmp->se_lun_acl, 745adf653f9SChristoph Hellwig lockdep_is_held(&lun_tmp->lun_deve_lock)); 74679dc9c9eSNicholas Bellinger nacl_tmp = lacl_tmp->se_lun_nacl; 747c66ac9dbSNicholas Bellinger /* 748c66ac9dbSNicholas Bellinger * Skip the matching struct se_node_acl that is allocated 749c66ac9dbSNicholas Bellinger * above.. 750c66ac9dbSNicholas Bellinger */ 751c66ac9dbSNicholas Bellinger if (nacl == nacl_tmp) 752c66ac9dbSNicholas Bellinger continue; 753c66ac9dbSNicholas Bellinger /* 754c66ac9dbSNicholas Bellinger * Only perform PR registrations for target ports on 755c66ac9dbSNicholas Bellinger * the same fabric module as the REGISTER w/ ALL_TG_PT=1 756c66ac9dbSNicholas Bellinger * arrived. 757c66ac9dbSNicholas Bellinger */ 758c66ac9dbSNicholas Bellinger if (tfo != nacl_tmp->se_tpg->se_tpg_tfo) 759c66ac9dbSNicholas Bellinger continue; 760c66ac9dbSNicholas Bellinger /* 761c66ac9dbSNicholas Bellinger * Look for a matching Initiator Node ACL in ASCII format 762c66ac9dbSNicholas Bellinger */ 763c66ac9dbSNicholas Bellinger if (strcmp(nacl->initiatorname, nacl_tmp->initiatorname)) 764c66ac9dbSNicholas Bellinger continue; 765c66ac9dbSNicholas Bellinger 76629a05deeSNicholas Bellinger kref_get(&deve_tmp->pr_kref); 7671adff1b3SNicholas Bellinger spin_unlock(&lun_tmp->lun_deve_lock); 768c66ac9dbSNicholas Bellinger /* 769c66ac9dbSNicholas Bellinger * Grab a configfs group dependency that is released 770c66ac9dbSNicholas Bellinger * for the exception path at label out: below, or upon 771c66ac9dbSNicholas Bellinger * completion of adding ALL_TG_PT=1 registrations in 772c66ac9dbSNicholas Bellinger * __core_scsi3_add_registration() 773c66ac9dbSNicholas Bellinger */ 774c66ac9dbSNicholas Bellinger ret = core_scsi3_lunacl_depend_item(deve_tmp); 775c66ac9dbSNicholas Bellinger if (ret < 0) { 7766708bb27SAndy Grover pr_err("core_scsi3_lunacl_depend" 777c66ac9dbSNicholas Bellinger "_item() failed\n"); 7789e37d042SNicholas Bellinger percpu_ref_put(&lun_tmp->lun_ref); 77929a05deeSNicholas Bellinger kref_put(&deve_tmp->pr_kref, target_pr_kref_release); 780c66ac9dbSNicholas Bellinger goto out; 781c66ac9dbSNicholas Bellinger } 782c66ac9dbSNicholas Bellinger /* 783c66ac9dbSNicholas Bellinger * Located a matching SCSI Initiator Port on a different 784c66ac9dbSNicholas Bellinger * port, allocate the pr_reg_atp and attach it to the 785c66ac9dbSNicholas Bellinger * pr_reg->pr_reg_atp_list that will be processed once 786c66ac9dbSNicholas Bellinger * the original *pr_reg is processed in 787c66ac9dbSNicholas Bellinger * __core_scsi3_add_registration() 788c66ac9dbSNicholas Bellinger */ 789adf653f9SChristoph Hellwig dest_lun = rcu_dereference_check(deve_tmp->se_lun, 79079dc9c9eSNicholas Bellinger atomic_read(&deve_tmp->pr_kref.refcount) != 0); 79179dc9c9eSNicholas Bellinger 792c66ac9dbSNicholas Bellinger pr_reg_atp = __core_scsi3_do_alloc_registration(dev, 793adf653f9SChristoph Hellwig nacl_tmp, dest_lun, deve_tmp, 79479dc9c9eSNicholas Bellinger deve_tmp->mapped_lun, NULL, 795c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl); 7966708bb27SAndy Grover if (!pr_reg_atp) { 7979e37d042SNicholas Bellinger percpu_ref_put(&lun_tmp->lun_ref); 798c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(deve_tmp); 799c66ac9dbSNicholas Bellinger goto out; 800c66ac9dbSNicholas Bellinger } 801c66ac9dbSNicholas Bellinger 802c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg_atp->pr_reg_atp_mem_list, 803c66ac9dbSNicholas Bellinger &pr_reg->pr_reg_atp_list); 8041adff1b3SNicholas Bellinger spin_lock(&lun_tmp->lun_deve_lock); 805c66ac9dbSNicholas Bellinger } 8061adff1b3SNicholas Bellinger spin_unlock(&lun_tmp->lun_deve_lock); 807c66ac9dbSNicholas Bellinger 808c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 8099e37d042SNicholas Bellinger percpu_ref_put(&lun_tmp->lun_ref); 810c66ac9dbSNicholas Bellinger } 811c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 812c66ac9dbSNicholas Bellinger 813c66ac9dbSNicholas Bellinger return pr_reg; 814c66ac9dbSNicholas Bellinger out: 815c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, 816c66ac9dbSNicholas Bellinger &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) { 817c66ac9dbSNicholas Bellinger list_del(&pr_reg_tmp->pr_reg_atp_mem_list); 818c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); 819c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp); 820c66ac9dbSNicholas Bellinger } 821c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 822c66ac9dbSNicholas Bellinger return NULL; 823c66ac9dbSNicholas Bellinger } 824c66ac9dbSNicholas Bellinger 825c66ac9dbSNicholas Bellinger int core_scsi3_alloc_aptpl_registration( 826e3d6f909SAndy Grover struct t10_reservation *pr_tmpl, 827c66ac9dbSNicholas Bellinger u64 sa_res_key, 828c66ac9dbSNicholas Bellinger unsigned char *i_port, 829c66ac9dbSNicholas Bellinger unsigned char *isid, 830f2d30680SHannes Reinecke u64 mapped_lun, 831c66ac9dbSNicholas Bellinger unsigned char *t_port, 832c66ac9dbSNicholas Bellinger u16 tpgt, 833f2d30680SHannes Reinecke u64 target_lun, 834c66ac9dbSNicholas Bellinger int res_holder, 835c66ac9dbSNicholas Bellinger int all_tg_pt, 836c66ac9dbSNicholas Bellinger u8 type) 837c66ac9dbSNicholas Bellinger { 838c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 839c66ac9dbSNicholas Bellinger 8406708bb27SAndy Grover if (!i_port || !t_port || !sa_res_key) { 8416708bb27SAndy Grover pr_err("Illegal parameters for APTPL registration\n"); 842e3d6f909SAndy Grover return -EINVAL; 843c66ac9dbSNicholas Bellinger } 844c66ac9dbSNicholas Bellinger 845c66ac9dbSNicholas Bellinger pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_KERNEL); 8466708bb27SAndy Grover if (!pr_reg) { 8476708bb27SAndy Grover pr_err("Unable to allocate struct t10_pr_registration\n"); 848e3d6f909SAndy Grover return -ENOMEM; 849c66ac9dbSNicholas Bellinger } 850c66ac9dbSNicholas Bellinger 851c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_list); 852c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list); 853c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list); 854c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list); 855c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list); 856c66ac9dbSNicholas Bellinger atomic_set(&pr_reg->pr_res_holders, 0); 857c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = NULL; 858c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve = NULL; 859c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun = mapped_lun; 860c66ac9dbSNicholas Bellinger pr_reg->pr_aptpl_target_lun = target_lun; 861c66ac9dbSNicholas Bellinger pr_reg->pr_res_key = sa_res_key; 862c66ac9dbSNicholas Bellinger pr_reg->pr_reg_all_tg_pt = all_tg_pt; 863c66ac9dbSNicholas Bellinger pr_reg->pr_reg_aptpl = 1; 864c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope = 0; /* Always LUN_SCOPE */ 865c66ac9dbSNicholas Bellinger pr_reg->pr_res_type = type; 866c66ac9dbSNicholas Bellinger /* 867c66ac9dbSNicholas Bellinger * If an ISID value had been saved in APTPL metadata for this 868c66ac9dbSNicholas Bellinger * SCSI Initiator Port, restore it now. 869c66ac9dbSNicholas Bellinger */ 870c66ac9dbSNicholas Bellinger if (isid != NULL) { 871c66ac9dbSNicholas Bellinger pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid); 872c66ac9dbSNicholas Bellinger snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid); 873c66ac9dbSNicholas Bellinger pr_reg->isid_present_at_reg = 1; 874c66ac9dbSNicholas Bellinger } 875c66ac9dbSNicholas Bellinger /* 876c66ac9dbSNicholas Bellinger * Copy the i_port and t_port information from caller. 877c66ac9dbSNicholas Bellinger */ 878c66ac9dbSNicholas Bellinger snprintf(pr_reg->pr_iport, PR_APTPL_MAX_IPORT_LEN, "%s", i_port); 879c66ac9dbSNicholas Bellinger snprintf(pr_reg->pr_tport, PR_APTPL_MAX_TPORT_LEN, "%s", t_port); 880c66ac9dbSNicholas Bellinger pr_reg->pr_reg_tpgt = tpgt; 881c66ac9dbSNicholas Bellinger /* 882c66ac9dbSNicholas Bellinger * Set pr_res_holder from caller, the pr_reg who is the reservation 883c66ac9dbSNicholas Bellinger * holder will get it's pointer set in core_scsi3_aptpl_reserve() once 884c66ac9dbSNicholas Bellinger * the Initiator Node LUN ACL from the fabric module is created for 885c66ac9dbSNicholas Bellinger * this registration. 886c66ac9dbSNicholas Bellinger */ 887c66ac9dbSNicholas Bellinger pr_reg->pr_res_holder = res_holder; 888c66ac9dbSNicholas Bellinger 889c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg->pr_reg_aptpl_list, &pr_tmpl->aptpl_reg_list); 8906708bb27SAndy Grover pr_debug("SPC-3 PR APTPL Successfully added registration%s from" 891c66ac9dbSNicholas Bellinger " metadata\n", (res_holder) ? "+reservation" : ""); 892c66ac9dbSNicholas Bellinger return 0; 893c66ac9dbSNicholas Bellinger } 894c66ac9dbSNicholas Bellinger 895c66ac9dbSNicholas Bellinger static void core_scsi3_aptpl_reserve( 896c66ac9dbSNicholas Bellinger struct se_device *dev, 897c66ac9dbSNicholas Bellinger struct se_portal_group *tpg, 898c66ac9dbSNicholas Bellinger struct se_node_acl *node_acl, 899c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg) 900c66ac9dbSNicholas Bellinger { 901c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 902c66ac9dbSNicholas Bellinger 903c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 904d2843c17SAndy Grover core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 905c66ac9dbSNicholas Bellinger 906c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 907c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = pr_reg; 908c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 909c66ac9dbSNicholas Bellinger 9106708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: APTPL RESERVE created" 911c66ac9dbSNicholas Bellinger " new reservation holder TYPE: %s ALL_TG_PT: %d\n", 912e3d6f909SAndy Grover tpg->se_tpg_tfo->get_fabric_name(), 913c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg->pr_res_type), 914c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); 9156708bb27SAndy Grover pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n", 916e3d6f909SAndy Grover tpg->se_tpg_tfo->get_fabric_name(), node_acl->initiatorname, 917d2843c17SAndy Grover i_buf); 918c66ac9dbSNicholas Bellinger } 919c66ac9dbSNicholas Bellinger 920c66ac9dbSNicholas Bellinger static void __core_scsi3_add_registration(struct se_device *, struct se_node_acl *, 92133ce6a87SAndy Grover struct t10_pr_registration *, enum register_type, int); 922c66ac9dbSNicholas Bellinger 923c66ac9dbSNicholas Bellinger static int __core_scsi3_check_aptpl_registration( 924c66ac9dbSNicholas Bellinger struct se_device *dev, 925c66ac9dbSNicholas Bellinger struct se_portal_group *tpg, 926c66ac9dbSNicholas Bellinger struct se_lun *lun, 927f2d30680SHannes Reinecke u64 target_lun, 928c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 929f2d30680SHannes Reinecke u64 mapped_lun) 930c66ac9dbSNicholas Bellinger { 931c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp; 9320fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 933c66ac9dbSNicholas Bellinger unsigned char i_port[PR_APTPL_MAX_IPORT_LEN]; 934c66ac9dbSNicholas Bellinger unsigned char t_port[PR_APTPL_MAX_TPORT_LEN]; 935c66ac9dbSNicholas Bellinger u16 tpgt; 936c66ac9dbSNicholas Bellinger 937c66ac9dbSNicholas Bellinger memset(i_port, 0, PR_APTPL_MAX_IPORT_LEN); 938c66ac9dbSNicholas Bellinger memset(t_port, 0, PR_APTPL_MAX_TPORT_LEN); 939c66ac9dbSNicholas Bellinger /* 940c66ac9dbSNicholas Bellinger * Copy Initiator Port information from struct se_node_acl 941c66ac9dbSNicholas Bellinger */ 942c66ac9dbSNicholas Bellinger snprintf(i_port, PR_APTPL_MAX_IPORT_LEN, "%s", nacl->initiatorname); 943c66ac9dbSNicholas Bellinger snprintf(t_port, PR_APTPL_MAX_TPORT_LEN, "%s", 944e3d6f909SAndy Grover tpg->se_tpg_tfo->tpg_get_wwn(tpg)); 945e3d6f909SAndy Grover tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); 946c66ac9dbSNicholas Bellinger /* 947c66ac9dbSNicholas Bellinger * Look for the matching registrations+reservation from those 948c66ac9dbSNicholas Bellinger * created from APTPL metadata. Note that multiple registrations 949c66ac9dbSNicholas Bellinger * may exist for fabrics that use ISIDs in their SCSI Initiator Port 950c66ac9dbSNicholas Bellinger * TransportIDs. 951c66ac9dbSNicholas Bellinger */ 952c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->aptpl_reg_lock); 953c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, 954c66ac9dbSNicholas Bellinger pr_reg_aptpl_list) { 95592404e60SNicholas Bellinger 9566708bb27SAndy Grover if (!strcmp(pr_reg->pr_iport, i_port) && 95729a05deeSNicholas Bellinger (pr_reg->pr_res_mapped_lun == mapped_lun) && 958c66ac9dbSNicholas Bellinger !(strcmp(pr_reg->pr_tport, t_port)) && 959c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_tpgt == tpgt) && 960c66ac9dbSNicholas Bellinger (pr_reg->pr_aptpl_target_lun == target_lun)) { 9613ccd6e83SNicholas Bellinger /* 9623ccd6e83SNicholas Bellinger * Obtain the ->pr_reg_deve pointer + reference, that 9633ccd6e83SNicholas Bellinger * is released by __core_scsi3_add_registration() below. 9643ccd6e83SNicholas Bellinger */ 9653ccd6e83SNicholas Bellinger rcu_read_lock(); 9663ccd6e83SNicholas Bellinger pr_reg->pr_reg_deve = target_nacl_find_deve(nacl, mapped_lun); 9673ccd6e83SNicholas Bellinger if (!pr_reg->pr_reg_deve) { 9683ccd6e83SNicholas Bellinger pr_err("Unable to locate PR APTPL %s mapped_lun:" 9693ccd6e83SNicholas Bellinger " %llu\n", nacl->initiatorname, mapped_lun); 9703ccd6e83SNicholas Bellinger rcu_read_unlock(); 9713ccd6e83SNicholas Bellinger continue; 9723ccd6e83SNicholas Bellinger } 9733ccd6e83SNicholas Bellinger kref_get(&pr_reg->pr_reg_deve->pr_kref); 9743ccd6e83SNicholas Bellinger rcu_read_unlock(); 975c66ac9dbSNicholas Bellinger 976c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = nacl; 977adf653f9SChristoph Hellwig pr_reg->tg_pt_sep_rtpi = lun->lun_rtpi; 978c66ac9dbSNicholas Bellinger list_del(&pr_reg->pr_reg_aptpl_list); 979c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->aptpl_reg_lock); 980c66ac9dbSNicholas Bellinger /* 981c66ac9dbSNicholas Bellinger * At this point all of the pointers in *pr_reg will 982c66ac9dbSNicholas Bellinger * be setup, so go ahead and add the registration. 983c66ac9dbSNicholas Bellinger */ 984c66ac9dbSNicholas Bellinger __core_scsi3_add_registration(dev, nacl, pr_reg, 0, 0); 985c66ac9dbSNicholas Bellinger /* 986c66ac9dbSNicholas Bellinger * If this registration is the reservation holder, 987c66ac9dbSNicholas Bellinger * make that happen now.. 988c66ac9dbSNicholas Bellinger */ 989c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_holder) 990c66ac9dbSNicholas Bellinger core_scsi3_aptpl_reserve(dev, tpg, 991c66ac9dbSNicholas Bellinger nacl, pr_reg); 992c66ac9dbSNicholas Bellinger /* 993c66ac9dbSNicholas Bellinger * Reenable pr_aptpl_active to accept new metadata 994c66ac9dbSNicholas Bellinger * updates once the SCSI device is active again.. 995c66ac9dbSNicholas Bellinger */ 996c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->aptpl_reg_lock); 997c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_active = 1; 998c66ac9dbSNicholas Bellinger } 999c66ac9dbSNicholas Bellinger } 1000c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->aptpl_reg_lock); 1001c66ac9dbSNicholas Bellinger 1002c66ac9dbSNicholas Bellinger return 0; 1003c66ac9dbSNicholas Bellinger } 1004c66ac9dbSNicholas Bellinger 1005c66ac9dbSNicholas Bellinger int core_scsi3_check_aptpl_registration( 1006c66ac9dbSNicholas Bellinger struct se_device *dev, 1007c66ac9dbSNicholas Bellinger struct se_portal_group *tpg, 1008c66ac9dbSNicholas Bellinger struct se_lun *lun, 1009e2480563SNicholas Bellinger struct se_node_acl *nacl, 1010f2d30680SHannes Reinecke u64 mapped_lun) 1011c66ac9dbSNicholas Bellinger { 1012d977f437SChristoph Hellwig if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1013c66ac9dbSNicholas Bellinger return 0; 1014c66ac9dbSNicholas Bellinger 1015c66ac9dbSNicholas Bellinger return __core_scsi3_check_aptpl_registration(dev, tpg, lun, 101629a05deeSNicholas Bellinger lun->unpacked_lun, nacl, 101729a05deeSNicholas Bellinger mapped_lun); 1018c66ac9dbSNicholas Bellinger } 1019c66ac9dbSNicholas Bellinger 1020c66ac9dbSNicholas Bellinger static void __core_scsi3_dump_registration( 10219ac8928eSChristoph Hellwig const struct target_core_fabric_ops *tfo, 1022c66ac9dbSNicholas Bellinger struct se_device *dev, 1023c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 1024c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 102533ce6a87SAndy Grover enum register_type register_type) 1026c66ac9dbSNicholas Bellinger { 1027c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg = nacl->se_tpg; 1028c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 1029c66ac9dbSNicholas Bellinger 1030c66ac9dbSNicholas Bellinger memset(&i_buf[0], 0, PR_REG_ISID_ID_LEN); 1031d2843c17SAndy Grover core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1032c66ac9dbSNicholas Bellinger 10336708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: REGISTER%s Initiator" 103433ce6a87SAndy Grover " Node: %s%s\n", tfo->get_fabric_name(), (register_type == REGISTER_AND_MOVE) ? 103533ce6a87SAndy Grover "_AND_MOVE" : (register_type == REGISTER_AND_IGNORE_EXISTING_KEY) ? 1036c66ac9dbSNicholas Bellinger "_AND_IGNORE_EXISTING_KEY" : "", nacl->initiatorname, 1037d2843c17SAndy Grover i_buf); 10386708bb27SAndy Grover pr_debug("SPC-3 PR [%s] registration on Target Port: %s,0x%04x\n", 1039c66ac9dbSNicholas Bellinger tfo->get_fabric_name(), tfo->tpg_get_wwn(se_tpg), 1040c66ac9dbSNicholas Bellinger tfo->tpg_get_tag(se_tpg)); 10416708bb27SAndy Grover pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target" 1042c66ac9dbSNicholas Bellinger " Port(s)\n", tfo->get_fabric_name(), 1043c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE", 1044e3d6f909SAndy Grover dev->transport->name); 10456708bb27SAndy Grover pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:" 1046c66ac9dbSNicholas Bellinger " 0x%08x APTPL: %d\n", tfo->get_fabric_name(), 1047c66ac9dbSNicholas Bellinger pr_reg->pr_res_key, pr_reg->pr_res_generation, 1048c66ac9dbSNicholas Bellinger pr_reg->pr_reg_aptpl); 1049c66ac9dbSNicholas Bellinger } 1050c66ac9dbSNicholas Bellinger 1051c66ac9dbSNicholas Bellinger static void __core_scsi3_add_registration( 1052c66ac9dbSNicholas Bellinger struct se_device *dev, 1053c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 1054c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 105533ce6a87SAndy Grover enum register_type register_type, 1056c66ac9dbSNicholas Bellinger int register_move) 1057c66ac9dbSNicholas Bellinger { 10589ac8928eSChristoph Hellwig const struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; 1059c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe; 10600fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 106180bfdfa9SNicholas Bellinger struct se_dev_entry *deve; 1062c66ac9dbSNicholas Bellinger 1063c66ac9dbSNicholas Bellinger /* 1064c66ac9dbSNicholas Bellinger * Increment PRgeneration counter for struct se_device upon a successful 1065c66ac9dbSNicholas Bellinger * REGISTER, see spc4r17 section 6.3.2 READ_KEYS service action 1066c66ac9dbSNicholas Bellinger * 1067c66ac9dbSNicholas Bellinger * Also, when register_move = 1 for PROUT REGISTER_AND_MOVE service 1068c66ac9dbSNicholas Bellinger * action, the struct se_device->dev_reservation_lock will already be held, 1069c66ac9dbSNicholas Bellinger * so we do not call core_scsi3_pr_generation() which grabs the lock 1070c66ac9dbSNicholas Bellinger * for the REGISTER. 1071c66ac9dbSNicholas Bellinger */ 1072c66ac9dbSNicholas Bellinger pr_reg->pr_res_generation = (register_move) ? 10730fd97ccfSChristoph Hellwig dev->t10_pr.pr_generation++ : 1074c66ac9dbSNicholas Bellinger core_scsi3_pr_generation(dev); 1075c66ac9dbSNicholas Bellinger 1076c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1077c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg->pr_reg_list, &pr_tmpl->registration_list); 1078c66ac9dbSNicholas Bellinger 1079c66ac9dbSNicholas Bellinger __core_scsi3_dump_registration(tfo, dev, nacl, pr_reg, register_type); 1080c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1081c66ac9dbSNicholas Bellinger /* 1082c66ac9dbSNicholas Bellinger * Skip extra processing for ALL_TG_PT=0 or REGISTER_AND_MOVE. 1083c66ac9dbSNicholas Bellinger */ 10846708bb27SAndy Grover if (!pr_reg->pr_reg_all_tg_pt || register_move) 10853ccd6e83SNicholas Bellinger goto out; 1086c66ac9dbSNicholas Bellinger /* 1087c66ac9dbSNicholas Bellinger * Walk pr_reg->pr_reg_atp_list and add registrations for ALL_TG_PT=1 1088c66ac9dbSNicholas Bellinger * allocated in __core_scsi3_alloc_registration() 1089c66ac9dbSNicholas Bellinger */ 1090c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, 1091c66ac9dbSNicholas Bellinger &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) { 109280bfdfa9SNicholas Bellinger struct se_node_acl *nacl_tmp = pr_reg_tmp->pr_reg_nacl; 109380bfdfa9SNicholas Bellinger 1094c66ac9dbSNicholas Bellinger list_del(&pr_reg_tmp->pr_reg_atp_mem_list); 1095c66ac9dbSNicholas Bellinger 1096c66ac9dbSNicholas Bellinger pr_reg_tmp->pr_res_generation = core_scsi3_pr_generation(dev); 1097c66ac9dbSNicholas Bellinger 1098c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1099c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg_tmp->pr_reg_list, 1100c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list); 1101c66ac9dbSNicholas Bellinger 110280bfdfa9SNicholas Bellinger __core_scsi3_dump_registration(tfo, dev, nacl_tmp, pr_reg_tmp, 1103c66ac9dbSNicholas Bellinger register_type); 1104c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 11053ccd6e83SNicholas Bellinger /* 11063ccd6e83SNicholas Bellinger * Drop configfs group dependency reference and deve->pr_kref 11073ccd6e83SNicholas Bellinger * obtained from __core_scsi3_alloc_registration() code. 11083ccd6e83SNicholas Bellinger */ 110980bfdfa9SNicholas Bellinger rcu_read_lock(); 111080bfdfa9SNicholas Bellinger deve = pr_reg_tmp->pr_reg_deve; 11113ccd6e83SNicholas Bellinger if (deve) { 111280bfdfa9SNicholas Bellinger set_bit(DEF_PR_REG_ACTIVE, &deve->deve_flags); 11133ccd6e83SNicholas Bellinger core_scsi3_lunacl_undepend_item(deve); 11143ccd6e83SNicholas Bellinger pr_reg_tmp->pr_reg_deve = NULL; 1115c66ac9dbSNicholas Bellinger } 11163ccd6e83SNicholas Bellinger rcu_read_unlock(); 11173ccd6e83SNicholas Bellinger } 11183ccd6e83SNicholas Bellinger out: 11193ccd6e83SNicholas Bellinger /* 11203ccd6e83SNicholas Bellinger * Drop deve->pr_kref obtained in __core_scsi3_do_alloc_registration() 11213ccd6e83SNicholas Bellinger */ 11223ccd6e83SNicholas Bellinger rcu_read_lock(); 11233ccd6e83SNicholas Bellinger deve = pr_reg->pr_reg_deve; 11243ccd6e83SNicholas Bellinger if (deve) { 11253ccd6e83SNicholas Bellinger set_bit(DEF_PR_REG_ACTIVE, &deve->deve_flags); 11263ccd6e83SNicholas Bellinger kref_put(&deve->pr_kref, target_pr_kref_release); 11273ccd6e83SNicholas Bellinger pr_reg->pr_reg_deve = NULL; 11283ccd6e83SNicholas Bellinger } 11293ccd6e83SNicholas Bellinger rcu_read_unlock(); 1130c66ac9dbSNicholas Bellinger } 1131c66ac9dbSNicholas Bellinger 1132c66ac9dbSNicholas Bellinger static int core_scsi3_alloc_registration( 1133c66ac9dbSNicholas Bellinger struct se_device *dev, 1134c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 113579dc9c9eSNicholas Bellinger struct se_lun *lun, 1136c66ac9dbSNicholas Bellinger struct se_dev_entry *deve, 1137f2d30680SHannes Reinecke u64 mapped_lun, 1138c66ac9dbSNicholas Bellinger unsigned char *isid, 1139c66ac9dbSNicholas Bellinger u64 sa_res_key, 1140c66ac9dbSNicholas Bellinger int all_tg_pt, 1141c66ac9dbSNicholas Bellinger int aptpl, 114233ce6a87SAndy Grover enum register_type register_type, 1143c66ac9dbSNicholas Bellinger int register_move) 1144c66ac9dbSNicholas Bellinger { 1145c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 1146c66ac9dbSNicholas Bellinger 114779dc9c9eSNicholas Bellinger pr_reg = __core_scsi3_alloc_registration(dev, nacl, lun, deve, mapped_lun, 114879dc9c9eSNicholas Bellinger isid, sa_res_key, all_tg_pt, 114979dc9c9eSNicholas Bellinger aptpl); 11506708bb27SAndy Grover if (!pr_reg) 1151e3d6f909SAndy Grover return -EPERM; 1152c66ac9dbSNicholas Bellinger 1153c66ac9dbSNicholas Bellinger __core_scsi3_add_registration(dev, nacl, pr_reg, 1154c66ac9dbSNicholas Bellinger register_type, register_move); 1155c66ac9dbSNicholas Bellinger return 0; 1156c66ac9dbSNicholas Bellinger } 1157c66ac9dbSNicholas Bellinger 1158c66ac9dbSNicholas Bellinger static struct t10_pr_registration *__core_scsi3_locate_pr_reg( 1159c66ac9dbSNicholas Bellinger struct se_device *dev, 1160c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 1161c66ac9dbSNicholas Bellinger unsigned char *isid) 1162c66ac9dbSNicholas Bellinger { 11630fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 1164c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp; 1165c66ac9dbSNicholas Bellinger struct se_portal_group *tpg; 1166c66ac9dbSNicholas Bellinger 1167c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1168c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 1169c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 1170c66ac9dbSNicholas Bellinger /* 1171c66ac9dbSNicholas Bellinger * First look for a matching struct se_node_acl 1172c66ac9dbSNicholas Bellinger */ 1173c66ac9dbSNicholas Bellinger if (pr_reg->pr_reg_nacl != nacl) 1174c66ac9dbSNicholas Bellinger continue; 1175c66ac9dbSNicholas Bellinger 1176c66ac9dbSNicholas Bellinger tpg = pr_reg->pr_reg_nacl->se_tpg; 1177c66ac9dbSNicholas Bellinger /* 1178c66ac9dbSNicholas Bellinger * If this registration does NOT contain a fabric provided 1179c66ac9dbSNicholas Bellinger * ISID, then we have found a match. 1180c66ac9dbSNicholas Bellinger */ 11816708bb27SAndy Grover if (!pr_reg->isid_present_at_reg) { 1182c66ac9dbSNicholas Bellinger /* 1183c66ac9dbSNicholas Bellinger * Determine if this SCSI device server requires that 1184c66ac9dbSNicholas Bellinger * SCSI Intiatior TransportID w/ ISIDs is enforced 1185c66ac9dbSNicholas Bellinger * for fabric modules (iSCSI) requiring them. 1186c66ac9dbSNicholas Bellinger */ 1187e3d6f909SAndy Grover if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { 11880fd97ccfSChristoph Hellwig if (dev->dev_attrib.enforce_pr_isids) 1189c66ac9dbSNicholas Bellinger continue; 1190c66ac9dbSNicholas Bellinger } 119133940d09SJoern Engel atomic_inc_mb(&pr_reg->pr_res_holders); 1192c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1193c66ac9dbSNicholas Bellinger return pr_reg; 1194c66ac9dbSNicholas Bellinger } 1195c66ac9dbSNicholas Bellinger /* 1196c66ac9dbSNicholas Bellinger * If the *pr_reg contains a fabric defined ISID for multi-value 1197c66ac9dbSNicholas Bellinger * SCSI Initiator Port TransportIDs, then we expect a valid 1198c66ac9dbSNicholas Bellinger * matching ISID to be provided by the local SCSI Initiator Port. 1199c66ac9dbSNicholas Bellinger */ 12006708bb27SAndy Grover if (!isid) 1201c66ac9dbSNicholas Bellinger continue; 1202c66ac9dbSNicholas Bellinger if (strcmp(isid, pr_reg->pr_reg_isid)) 1203c66ac9dbSNicholas Bellinger continue; 1204c66ac9dbSNicholas Bellinger 120533940d09SJoern Engel atomic_inc_mb(&pr_reg->pr_res_holders); 1206c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1207c66ac9dbSNicholas Bellinger return pr_reg; 1208c66ac9dbSNicholas Bellinger } 1209c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1210c66ac9dbSNicholas Bellinger 1211c66ac9dbSNicholas Bellinger return NULL; 1212c66ac9dbSNicholas Bellinger } 1213c66ac9dbSNicholas Bellinger 1214c66ac9dbSNicholas Bellinger static struct t10_pr_registration *core_scsi3_locate_pr_reg( 1215c66ac9dbSNicholas Bellinger struct se_device *dev, 1216c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 1217c66ac9dbSNicholas Bellinger struct se_session *sess) 1218c66ac9dbSNicholas Bellinger { 1219c66ac9dbSNicholas Bellinger struct se_portal_group *tpg = nacl->se_tpg; 1220c66ac9dbSNicholas Bellinger unsigned char buf[PR_REG_ISID_LEN], *isid_ptr = NULL; 1221c66ac9dbSNicholas Bellinger 1222e3d6f909SAndy Grover if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { 1223c66ac9dbSNicholas Bellinger memset(&buf[0], 0, PR_REG_ISID_LEN); 1224e3d6f909SAndy Grover tpg->se_tpg_tfo->sess_get_initiator_sid(sess, &buf[0], 1225c66ac9dbSNicholas Bellinger PR_REG_ISID_LEN); 1226c66ac9dbSNicholas Bellinger isid_ptr = &buf[0]; 1227c66ac9dbSNicholas Bellinger } 1228c66ac9dbSNicholas Bellinger 1229c66ac9dbSNicholas Bellinger return __core_scsi3_locate_pr_reg(dev, nacl, isid_ptr); 1230c66ac9dbSNicholas Bellinger } 1231c66ac9dbSNicholas Bellinger 1232c66ac9dbSNicholas Bellinger static void core_scsi3_put_pr_reg(struct t10_pr_registration *pr_reg) 1233c66ac9dbSNicholas Bellinger { 123433940d09SJoern Engel atomic_dec_mb(&pr_reg->pr_res_holders); 1235c66ac9dbSNicholas Bellinger } 1236c66ac9dbSNicholas Bellinger 1237125d0119SHannes Reinecke static int core_scsi3_check_implicit_release( 1238c66ac9dbSNicholas Bellinger struct se_device *dev, 1239c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg) 1240c66ac9dbSNicholas Bellinger { 1241c66ac9dbSNicholas Bellinger struct se_node_acl *nacl = pr_reg->pr_reg_nacl; 1242c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_res_holder; 1243c66ac9dbSNicholas Bellinger int ret = 0; 1244c66ac9dbSNicholas Bellinger 1245c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 1246c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 12476708bb27SAndy Grover if (!pr_res_holder) { 1248c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1249c66ac9dbSNicholas Bellinger return ret; 1250c66ac9dbSNicholas Bellinger } 1251c66ac9dbSNicholas Bellinger if (pr_res_holder == pr_reg) { 1252c66ac9dbSNicholas Bellinger /* 1253125d0119SHannes Reinecke * Perform an implicit RELEASE if the registration that 1254c66ac9dbSNicholas Bellinger * is being released is holding the reservation. 1255c66ac9dbSNicholas Bellinger * 1256c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.11.1: 1257c66ac9dbSNicholas Bellinger * 1258c66ac9dbSNicholas Bellinger * e) If the I_T nexus is the persistent reservation holder 1259c66ac9dbSNicholas Bellinger * and the persistent reservation is not an all registrants 1260c66ac9dbSNicholas Bellinger * type, then a PERSISTENT RESERVE OUT command with REGISTER 1261c66ac9dbSNicholas Bellinger * service action or REGISTER AND IGNORE EXISTING KEY 1262c66ac9dbSNicholas Bellinger * service action with the SERVICE ACTION RESERVATION KEY 1263c66ac9dbSNicholas Bellinger * field set to zero (see 5.7.11.3). 1264c66ac9dbSNicholas Bellinger */ 12656c3c9baaSNicholas Bellinger __core_scsi3_complete_pro_release(dev, nacl, pr_reg, 0, 1); 1266c66ac9dbSNicholas Bellinger ret = 1; 1267c66ac9dbSNicholas Bellinger /* 1268c66ac9dbSNicholas Bellinger * For 'All Registrants' reservation types, all existing 1269c66ac9dbSNicholas Bellinger * registrations are still processed as reservation holders 1270c66ac9dbSNicholas Bellinger * in core_scsi3_pr_seq_non_holder() after the initial 1271125d0119SHannes Reinecke * reservation holder is implicitly released here. 1272c66ac9dbSNicholas Bellinger */ 1273c66ac9dbSNicholas Bellinger } else if (pr_reg->pr_reg_all_tg_pt && 1274c66ac9dbSNicholas Bellinger (!strcmp(pr_res_holder->pr_reg_nacl->initiatorname, 1275c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->initiatorname)) && 1276c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_key == pr_reg->pr_res_key)) { 12776708bb27SAndy Grover pr_err("SPC-3 PR: Unable to perform ALL_TG_PT=1" 1278c66ac9dbSNicholas Bellinger " UNREGISTER while existing reservation with matching" 1279c66ac9dbSNicholas Bellinger " key 0x%016Lx is present from another SCSI Initiator" 1280c66ac9dbSNicholas Bellinger " Port\n", pr_reg->pr_res_key); 1281e3d6f909SAndy Grover ret = -EPERM; 1282c66ac9dbSNicholas Bellinger } 1283c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1284c66ac9dbSNicholas Bellinger 1285c66ac9dbSNicholas Bellinger return ret; 1286c66ac9dbSNicholas Bellinger } 1287c66ac9dbSNicholas Bellinger 1288c66ac9dbSNicholas Bellinger /* 1289e3d6f909SAndy Grover * Called with struct t10_reservation->registration_lock held. 1290c66ac9dbSNicholas Bellinger */ 1291c66ac9dbSNicholas Bellinger static void __core_scsi3_free_registration( 1292c66ac9dbSNicholas Bellinger struct se_device *dev, 1293c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 1294c66ac9dbSNicholas Bellinger struct list_head *preempt_and_abort_list, 1295c66ac9dbSNicholas Bellinger int dec_holders) 1296cb0df4d3SBart Van Assche __releases(&pr_tmpl->registration_lock) 1297cb0df4d3SBart Van Assche __acquires(&pr_tmpl->registration_lock) 1298c66ac9dbSNicholas Bellinger { 12999ac8928eSChristoph Hellwig const struct target_core_fabric_ops *tfo = 1300c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 13010fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 130280bfdfa9SNicholas Bellinger struct se_node_acl *nacl = pr_reg->pr_reg_nacl; 130380bfdfa9SNicholas Bellinger struct se_dev_entry *deve; 1304c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 1305c66ac9dbSNicholas Bellinger 1306c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1307d2843c17SAndy Grover core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1308c66ac9dbSNicholas Bellinger 13096c3c9baaSNicholas Bellinger if (!list_empty(&pr_reg->pr_reg_list)) 1310c66ac9dbSNicholas Bellinger list_del(&pr_reg->pr_reg_list); 1311c66ac9dbSNicholas Bellinger /* 1312c66ac9dbSNicholas Bellinger * Caller accessing *pr_reg using core_scsi3_locate_pr_reg(), 1313c66ac9dbSNicholas Bellinger * so call core_scsi3_put_pr_reg() to decrement our reference. 1314c66ac9dbSNicholas Bellinger */ 1315c66ac9dbSNicholas Bellinger if (dec_holders) 1316c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 131780bfdfa9SNicholas Bellinger 131880bfdfa9SNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1319c66ac9dbSNicholas Bellinger /* 1320c66ac9dbSNicholas Bellinger * Wait until all reference from any other I_T nexuses for this 1321c66ac9dbSNicholas Bellinger * *pr_reg have been released. Because list_del() is called above, 1322c66ac9dbSNicholas Bellinger * the last core_scsi3_put_pr_reg(pr_reg) will release this reference 1323c66ac9dbSNicholas Bellinger * count back to zero, and we release *pr_reg. 1324c66ac9dbSNicholas Bellinger */ 1325c66ac9dbSNicholas Bellinger while (atomic_read(&pr_reg->pr_res_holders) != 0) { 13266708bb27SAndy Grover pr_debug("SPC-3 PR [%s] waiting for pr_res_holders\n", 1327c66ac9dbSNicholas Bellinger tfo->get_fabric_name()); 1328c66ac9dbSNicholas Bellinger cpu_relax(); 1329c66ac9dbSNicholas Bellinger } 1330c66ac9dbSNicholas Bellinger 133180bfdfa9SNicholas Bellinger rcu_read_lock(); 133280bfdfa9SNicholas Bellinger deve = target_nacl_find_deve(nacl, pr_reg->pr_res_mapped_lun); 133380bfdfa9SNicholas Bellinger if (deve) 133480bfdfa9SNicholas Bellinger clear_bit(DEF_PR_REG_ACTIVE, &deve->deve_flags); 133580bfdfa9SNicholas Bellinger rcu_read_unlock(); 133680bfdfa9SNicholas Bellinger 133780bfdfa9SNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 13386708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: UNREGISTER Initiator" 1339c66ac9dbSNicholas Bellinger " Node: %s%s\n", tfo->get_fabric_name(), 1340c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->initiatorname, 1341d2843c17SAndy Grover i_buf); 13426708bb27SAndy Grover pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target" 1343c66ac9dbSNicholas Bellinger " Port(s)\n", tfo->get_fabric_name(), 1344c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE", 1345e3d6f909SAndy Grover dev->transport->name); 13466708bb27SAndy Grover pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:" 1347c66ac9dbSNicholas Bellinger " 0x%08x\n", tfo->get_fabric_name(), pr_reg->pr_res_key, 1348c66ac9dbSNicholas Bellinger pr_reg->pr_res_generation); 1349c66ac9dbSNicholas Bellinger 13506708bb27SAndy Grover if (!preempt_and_abort_list) { 1351c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve = NULL; 1352c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = NULL; 1353c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 1354c66ac9dbSNicholas Bellinger return; 1355c66ac9dbSNicholas Bellinger } 1356c66ac9dbSNicholas Bellinger /* 1357c66ac9dbSNicholas Bellinger * For PREEMPT_AND_ABORT, the list of *pr_reg in preempt_and_abort_list 1358c66ac9dbSNicholas Bellinger * are released once the ABORT_TASK_SET has completed.. 1359c66ac9dbSNicholas Bellinger */ 1360c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg->pr_reg_abort_list, preempt_and_abort_list); 1361c66ac9dbSNicholas Bellinger } 1362c66ac9dbSNicholas Bellinger 1363c66ac9dbSNicholas Bellinger void core_scsi3_free_pr_reg_from_nacl( 1364c66ac9dbSNicholas Bellinger struct se_device *dev, 1365c66ac9dbSNicholas Bellinger struct se_node_acl *nacl) 1366c66ac9dbSNicholas Bellinger { 13670fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 1368c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder; 13696c3c9baaSNicholas Bellinger bool free_reg = false; 1370c66ac9dbSNicholas Bellinger /* 1371c66ac9dbSNicholas Bellinger * If the passed se_node_acl matches the reservation holder, 1372c66ac9dbSNicholas Bellinger * release the reservation. 1373c66ac9dbSNicholas Bellinger */ 1374c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 1375c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 1376c66ac9dbSNicholas Bellinger if ((pr_res_holder != NULL) && 13776c3c9baaSNicholas Bellinger (pr_res_holder->pr_reg_nacl == nacl)) { 13786c3c9baaSNicholas Bellinger __core_scsi3_complete_pro_release(dev, nacl, pr_res_holder, 0, 1); 13796c3c9baaSNicholas Bellinger free_reg = true; 13806c3c9baaSNicholas Bellinger } 1381c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1382c66ac9dbSNicholas Bellinger /* 1383c66ac9dbSNicholas Bellinger * Release any registration associated with the struct se_node_acl. 1384c66ac9dbSNicholas Bellinger */ 1385c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 13866c3c9baaSNicholas Bellinger if (pr_res_holder && free_reg) 13876c3c9baaSNicholas Bellinger __core_scsi3_free_registration(dev, pr_res_holder, NULL, 0); 13886c3c9baaSNicholas Bellinger 1389c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 1390c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 1391c66ac9dbSNicholas Bellinger 1392c66ac9dbSNicholas Bellinger if (pr_reg->pr_reg_nacl != nacl) 1393c66ac9dbSNicholas Bellinger continue; 1394c66ac9dbSNicholas Bellinger 1395c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, NULL, 0); 1396c66ac9dbSNicholas Bellinger } 1397c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1398c66ac9dbSNicholas Bellinger } 1399c66ac9dbSNicholas Bellinger 1400c66ac9dbSNicholas Bellinger void core_scsi3_free_all_registrations( 1401c66ac9dbSNicholas Bellinger struct se_device *dev) 1402c66ac9dbSNicholas Bellinger { 14030fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 1404c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder; 1405c66ac9dbSNicholas Bellinger 1406c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 1407c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 1408c66ac9dbSNicholas Bellinger if (pr_res_holder != NULL) { 1409c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 1410c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, pr_res_nacl, 14116c3c9baaSNicholas Bellinger pr_res_holder, 0, 0); 1412c66ac9dbSNicholas Bellinger } 1413c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1414c66ac9dbSNicholas Bellinger 1415c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1416c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 1417c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 1418c66ac9dbSNicholas Bellinger 1419c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, NULL, 0); 1420c66ac9dbSNicholas Bellinger } 1421c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1422c66ac9dbSNicholas Bellinger 1423c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->aptpl_reg_lock); 1424c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, 1425c66ac9dbSNicholas Bellinger pr_reg_aptpl_list) { 1426c66ac9dbSNicholas Bellinger list_del(&pr_reg->pr_reg_aptpl_list); 1427c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 1428c66ac9dbSNicholas Bellinger } 1429c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->aptpl_reg_lock); 1430c66ac9dbSNicholas Bellinger } 1431c66ac9dbSNicholas Bellinger 1432c66ac9dbSNicholas Bellinger static int core_scsi3_tpg_depend_item(struct se_portal_group *tpg) 1433c66ac9dbSNicholas Bellinger { 1434d588cf8fSChristoph Hellwig return target_depend_item(&tpg->tpg_group.cg_item); 1435c66ac9dbSNicholas Bellinger } 1436c66ac9dbSNicholas Bellinger 1437c66ac9dbSNicholas Bellinger static void core_scsi3_tpg_undepend_item(struct se_portal_group *tpg) 1438c66ac9dbSNicholas Bellinger { 1439d588cf8fSChristoph Hellwig target_undepend_item(&tpg->tpg_group.cg_item); 144033940d09SJoern Engel atomic_dec_mb(&tpg->tpg_pr_ref_count); 1441c66ac9dbSNicholas Bellinger } 1442c66ac9dbSNicholas Bellinger 1443c66ac9dbSNicholas Bellinger static int core_scsi3_nodeacl_depend_item(struct se_node_acl *nacl) 1444c66ac9dbSNicholas Bellinger { 1445c66ac9dbSNicholas Bellinger if (nacl->dynamic_node_acl) 1446c66ac9dbSNicholas Bellinger return 0; 1447d588cf8fSChristoph Hellwig return target_depend_item(&nacl->acl_group.cg_item); 1448c66ac9dbSNicholas Bellinger } 1449c66ac9dbSNicholas Bellinger 1450c66ac9dbSNicholas Bellinger static void core_scsi3_nodeacl_undepend_item(struct se_node_acl *nacl) 1451c66ac9dbSNicholas Bellinger { 1452d588cf8fSChristoph Hellwig if (!nacl->dynamic_node_acl) 1453d588cf8fSChristoph Hellwig target_undepend_item(&nacl->acl_group.cg_item); 145433940d09SJoern Engel atomic_dec_mb(&nacl->acl_pr_ref_count); 1455c66ac9dbSNicholas Bellinger } 1456c66ac9dbSNicholas Bellinger 1457c66ac9dbSNicholas Bellinger static int core_scsi3_lunacl_depend_item(struct se_dev_entry *se_deve) 1458c66ac9dbSNicholas Bellinger { 145979dc9c9eSNicholas Bellinger struct se_lun_acl *lun_acl; 1460ac75d8beSBart Van Assche 1461c66ac9dbSNicholas Bellinger /* 1462c66ac9dbSNicholas Bellinger * For nacl->dynamic_node_acl=1 1463c66ac9dbSNicholas Bellinger */ 146479dc9c9eSNicholas Bellinger lun_acl = rcu_dereference_check(se_deve->se_lun_acl, 146579dc9c9eSNicholas Bellinger atomic_read(&se_deve->pr_kref.refcount) != 0); 14666708bb27SAndy Grover if (!lun_acl) 1467c66ac9dbSNicholas Bellinger return 0; 1468c66ac9dbSNicholas Bellinger 1469d588cf8fSChristoph Hellwig return target_depend_item(&lun_acl->se_lun_group.cg_item); 1470c66ac9dbSNicholas Bellinger } 1471c66ac9dbSNicholas Bellinger 1472c66ac9dbSNicholas Bellinger static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *se_deve) 1473c66ac9dbSNicholas Bellinger { 147429a05deeSNicholas Bellinger struct se_lun_acl *lun_acl; 1475ac75d8beSBart Van Assche 1476c66ac9dbSNicholas Bellinger /* 1477c66ac9dbSNicholas Bellinger * For nacl->dynamic_node_acl=1 1478c66ac9dbSNicholas Bellinger */ 147979dc9c9eSNicholas Bellinger lun_acl = rcu_dereference_check(se_deve->se_lun_acl, 148079dc9c9eSNicholas Bellinger atomic_read(&se_deve->pr_kref.refcount) != 0); 14816708bb27SAndy Grover if (!lun_acl) { 148229a05deeSNicholas Bellinger kref_put(&se_deve->pr_kref, target_pr_kref_release); 1483c66ac9dbSNicholas Bellinger return; 1484c66ac9dbSNicholas Bellinger } 1485c66ac9dbSNicholas Bellinger 1486d588cf8fSChristoph Hellwig target_undepend_item(&lun_acl->se_lun_group.cg_item); 148729a05deeSNicholas Bellinger kref_put(&se_deve->pr_kref, target_pr_kref_release); 1488c66ac9dbSNicholas Bellinger } 1489c66ac9dbSNicholas Bellinger 1490de103c93SChristoph Hellwig static sense_reason_t 1491de103c93SChristoph Hellwig core_scsi3_decode_spec_i_port( 1492c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 1493c66ac9dbSNicholas Bellinger struct se_portal_group *tpg, 1494c66ac9dbSNicholas Bellinger unsigned char *l_isid, 1495c66ac9dbSNicholas Bellinger u64 sa_res_key, 1496c66ac9dbSNicholas Bellinger int all_tg_pt, 1497c66ac9dbSNicholas Bellinger int aptpl) 1498c66ac9dbSNicholas Bellinger { 14995951146dSAndy Grover struct se_device *dev = cmd->se_dev; 1500c66ac9dbSNicholas Bellinger struct se_portal_group *dest_tpg = NULL, *tmp_tpg; 1501e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 1502c66ac9dbSNicholas Bellinger struct se_node_acl *dest_node_acl = NULL; 150379dc9c9eSNicholas Bellinger struct se_dev_entry *dest_se_deve = NULL; 1504c66ac9dbSNicholas Bellinger struct t10_pr_registration *dest_pr_reg, *local_pr_reg, *pr_reg_e; 1505c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe; 1506d0f474e5SRoland Dreier LIST_HEAD(tid_dest_list); 1507c66ac9dbSNicholas Bellinger struct pr_transport_id_holder *tidh_new, *tidh, *tidh_tmp; 15082650d71eSChristoph Hellwig unsigned char *buf, *ptr, proto_ident; 15099b353cc8SSagi Grimberg const unsigned char *i_str = NULL; 151013ba564cSJulia Lawall char *iport_ptr = NULL, i_buf[PR_REG_ISID_ID_LEN]; 1511de103c93SChristoph Hellwig sense_reason_t ret; 1512c66ac9dbSNicholas Bellinger u32 tpdl, tid_len = 0; 1513c66ac9dbSNicholas Bellinger u32 dest_rtpi = 0; 1514c66ac9dbSNicholas Bellinger 1515c66ac9dbSNicholas Bellinger /* 1516c66ac9dbSNicholas Bellinger * Allocate a struct pr_transport_id_holder and setup the 151779dc9c9eSNicholas Bellinger * local_node_acl pointer and add to struct list_head tid_dest_list 151879dc9c9eSNicholas Bellinger * for add registration processing in the loop of tid_dest_list below. 1519c66ac9dbSNicholas Bellinger */ 1520c66ac9dbSNicholas Bellinger tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), GFP_KERNEL); 15216708bb27SAndy Grover if (!tidh_new) { 15226708bb27SAndy Grover pr_err("Unable to allocate tidh_new\n"); 1523de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1524c66ac9dbSNicholas Bellinger } 1525c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&tidh_new->dest_list); 1526c66ac9dbSNicholas Bellinger tidh_new->dest_tpg = tpg; 1527c66ac9dbSNicholas Bellinger tidh_new->dest_node_acl = se_sess->se_node_acl; 1528c66ac9dbSNicholas Bellinger 15295951146dSAndy Grover local_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev, 153079dc9c9eSNicholas Bellinger se_sess->se_node_acl, cmd->se_lun, 153179dc9c9eSNicholas Bellinger NULL, cmd->orig_fe_lun, l_isid, 1532c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl); 15336708bb27SAndy Grover if (!local_pr_reg) { 1534c66ac9dbSNicholas Bellinger kfree(tidh_new); 1535de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1536c66ac9dbSNicholas Bellinger } 1537c66ac9dbSNicholas Bellinger tidh_new->dest_pr_reg = local_pr_reg; 1538c66ac9dbSNicholas Bellinger /* 1539c66ac9dbSNicholas Bellinger * The local I_T nexus does not hold any configfs dependances, 154079dc9c9eSNicholas Bellinger * so we set tidh_new->dest_se_deve to NULL to prevent the 1541c66ac9dbSNicholas Bellinger * configfs_undepend_item() calls in the tid_dest_list loops below. 1542c66ac9dbSNicholas Bellinger */ 154379dc9c9eSNicholas Bellinger tidh_new->dest_se_deve = NULL; 1544c66ac9dbSNicholas Bellinger list_add_tail(&tidh_new->dest_list, &tid_dest_list); 154505d1c7c0SAndy Grover 15460d7f1299SPaolo Bonzini if (cmd->data_length < 28) { 15470d7f1299SPaolo Bonzini pr_warn("SPC-PR: Received PR OUT parameter list" 15480d7f1299SPaolo Bonzini " length too small: %u\n", cmd->data_length); 1549de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 15500d7f1299SPaolo Bonzini goto out; 15510d7f1299SPaolo Bonzini } 15520d7f1299SPaolo Bonzini 15534949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 1554de103c93SChristoph Hellwig if (!buf) { 1555de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1556de103c93SChristoph Hellwig goto out; 1557de103c93SChristoph Hellwig } 1558de103c93SChristoph Hellwig 1559c66ac9dbSNicholas Bellinger /* 1560c66ac9dbSNicholas Bellinger * For a PERSISTENT RESERVE OUT specify initiator ports payload, 1561c66ac9dbSNicholas Bellinger * first extract TransportID Parameter Data Length, and make sure 1562c66ac9dbSNicholas Bellinger * the value matches up to the SCSI expected data transfer length. 1563c66ac9dbSNicholas Bellinger */ 1564c66ac9dbSNicholas Bellinger tpdl = (buf[24] & 0xff) << 24; 1565c66ac9dbSNicholas Bellinger tpdl |= (buf[25] & 0xff) << 16; 1566c66ac9dbSNicholas Bellinger tpdl |= (buf[26] & 0xff) << 8; 1567c66ac9dbSNicholas Bellinger tpdl |= buf[27] & 0xff; 1568c66ac9dbSNicholas Bellinger 1569c66ac9dbSNicholas Bellinger if ((tpdl + 28) != cmd->data_length) { 15706708bb27SAndy Grover pr_err("SPC-3 PR: Illegal tpdl: %u + 28 byte header" 1571c66ac9dbSNicholas Bellinger " does not equal CDB data_length: %u\n", tpdl, 1572c66ac9dbSNicholas Bellinger cmd->data_length); 1573de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 1574de103c93SChristoph Hellwig goto out_unmap; 1575c66ac9dbSNicholas Bellinger } 1576c66ac9dbSNicholas Bellinger /* 1577c66ac9dbSNicholas Bellinger * Start processing the received transport IDs using the 1578c66ac9dbSNicholas Bellinger * receiving I_T Nexus portal's fabric dependent methods to 1579c66ac9dbSNicholas Bellinger * obtain the SCSI Initiator Port/Device Identifiers. 1580c66ac9dbSNicholas Bellinger */ 1581c66ac9dbSNicholas Bellinger ptr = &buf[28]; 1582c66ac9dbSNicholas Bellinger 1583c66ac9dbSNicholas Bellinger while (tpdl > 0) { 1584adf653f9SChristoph Hellwig struct se_lun *dest_lun, *tmp_lun; 158579dc9c9eSNicholas Bellinger 1586c66ac9dbSNicholas Bellinger proto_ident = (ptr[0] & 0x0f); 1587c66ac9dbSNicholas Bellinger dest_tpg = NULL; 1588c66ac9dbSNicholas Bellinger 1589c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 1590adf653f9SChristoph Hellwig list_for_each_entry(tmp_lun, &dev->dev_sep_list, lun_dev_link) { 1591adf653f9SChristoph Hellwig tmp_tpg = tmp_lun->lun_tpg; 15922650d71eSChristoph Hellwig 1593c66ac9dbSNicholas Bellinger /* 1594c66ac9dbSNicholas Bellinger * Look for the matching proto_ident provided by 1595c66ac9dbSNicholas Bellinger * the received TransportID 1596c66ac9dbSNicholas Bellinger */ 15972aeeafaeSChristoph Hellwig if (tmp_tpg->proto_id != proto_ident) 1598c66ac9dbSNicholas Bellinger continue; 1599adf653f9SChristoph Hellwig dest_rtpi = tmp_lun->lun_rtpi; 1600c66ac9dbSNicholas Bellinger 16012650d71eSChristoph Hellwig i_str = target_parse_pr_out_transport_id(tmp_tpg, 16022650d71eSChristoph Hellwig (const char *)ptr, &tid_len, &iport_ptr); 16036708bb27SAndy Grover if (!i_str) 1604c66ac9dbSNicholas Bellinger continue; 1605c66ac9dbSNicholas Bellinger 160633940d09SJoern Engel atomic_inc_mb(&tmp_tpg->tpg_pr_ref_count); 1607c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 1608c66ac9dbSNicholas Bellinger 1609de103c93SChristoph Hellwig if (core_scsi3_tpg_depend_item(tmp_tpg)) { 16106708bb27SAndy Grover pr_err(" core_scsi3_tpg_depend_item()" 1611c66ac9dbSNicholas Bellinger " for tmp_tpg\n"); 161233940d09SJoern Engel atomic_dec_mb(&tmp_tpg->tpg_pr_ref_count); 1613de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1614de103c93SChristoph Hellwig goto out_unmap; 1615c66ac9dbSNicholas Bellinger } 1616c66ac9dbSNicholas Bellinger /* 161735d1efe8SMasanari Iida * Locate the destination initiator ACL to be registered 1618c66ac9dbSNicholas Bellinger * from the decoded fabric module specific TransportID 1619c66ac9dbSNicholas Bellinger * at *i_str. 1620c66ac9dbSNicholas Bellinger */ 1621403edd78SNicholas Bellinger mutex_lock(&tmp_tpg->acl_node_mutex); 1622c66ac9dbSNicholas Bellinger dest_node_acl = __core_tpg_get_initiator_node_acl( 1623c66ac9dbSNicholas Bellinger tmp_tpg, i_str); 162433940d09SJoern Engel if (dest_node_acl) 162533940d09SJoern Engel atomic_inc_mb(&dest_node_acl->acl_pr_ref_count); 1626403edd78SNicholas Bellinger mutex_unlock(&tmp_tpg->acl_node_mutex); 1627c66ac9dbSNicholas Bellinger 16286708bb27SAndy Grover if (!dest_node_acl) { 1629c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(tmp_tpg); 1630c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 1631c66ac9dbSNicholas Bellinger continue; 1632c66ac9dbSNicholas Bellinger } 1633c66ac9dbSNicholas Bellinger 1634de103c93SChristoph Hellwig if (core_scsi3_nodeacl_depend_item(dest_node_acl)) { 16356708bb27SAndy Grover pr_err("configfs_depend_item() failed" 1636c66ac9dbSNicholas Bellinger " for dest_node_acl->acl_group\n"); 163733940d09SJoern Engel atomic_dec_mb(&dest_node_acl->acl_pr_ref_count); 1638c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(tmp_tpg); 1639de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1640de103c93SChristoph Hellwig goto out_unmap; 1641c66ac9dbSNicholas Bellinger } 1642c66ac9dbSNicholas Bellinger 1643c66ac9dbSNicholas Bellinger dest_tpg = tmp_tpg; 16446708bb27SAndy Grover pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node:" 1645c66ac9dbSNicholas Bellinger " %s Port RTPI: %hu\n", 1646e3d6f909SAndy Grover dest_tpg->se_tpg_tfo->get_fabric_name(), 1647c66ac9dbSNicholas Bellinger dest_node_acl->initiatorname, dest_rtpi); 1648c66ac9dbSNicholas Bellinger 1649c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 1650c66ac9dbSNicholas Bellinger break; 1651c66ac9dbSNicholas Bellinger } 1652c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 1653c66ac9dbSNicholas Bellinger 16546708bb27SAndy Grover if (!dest_tpg) { 16556708bb27SAndy Grover pr_err("SPC-3 PR SPEC_I_PT: Unable to locate" 1656c66ac9dbSNicholas Bellinger " dest_tpg\n"); 1657de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 1658de103c93SChristoph Hellwig goto out_unmap; 1659c66ac9dbSNicholas Bellinger } 16608b1e1244SAndy Grover 16616708bb27SAndy Grover pr_debug("SPC-3 PR SPEC_I_PT: Got %s data_length: %u tpdl: %u" 1662c66ac9dbSNicholas Bellinger " tid_len: %d for %s + %s\n", 1663e3d6f909SAndy Grover dest_tpg->se_tpg_tfo->get_fabric_name(), cmd->data_length, 1664c66ac9dbSNicholas Bellinger tpdl, tid_len, i_str, iport_ptr); 16658b1e1244SAndy Grover 1666c66ac9dbSNicholas Bellinger if (tid_len > tpdl) { 16676708bb27SAndy Grover pr_err("SPC-3 PR SPEC_I_PT: Illegal tid_len:" 1668c66ac9dbSNicholas Bellinger " %u for Transport ID: %s\n", tid_len, ptr); 1669c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1670c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1671de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 1672de103c93SChristoph Hellwig goto out_unmap; 1673c66ac9dbSNicholas Bellinger } 1674c66ac9dbSNicholas Bellinger /* 1675c66ac9dbSNicholas Bellinger * Locate the desintation struct se_dev_entry pointer for matching 1676c66ac9dbSNicholas Bellinger * RELATIVE TARGET PORT IDENTIFIER on the receiving I_T Nexus 1677c66ac9dbSNicholas Bellinger * Target Port. 1678c66ac9dbSNicholas Bellinger */ 1679c66ac9dbSNicholas Bellinger dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, 1680c66ac9dbSNicholas Bellinger dest_rtpi); 16816708bb27SAndy Grover if (!dest_se_deve) { 16826708bb27SAndy Grover pr_err("Unable to locate %s dest_se_deve" 1683c66ac9dbSNicholas Bellinger " from destination RTPI: %hu\n", 1684e3d6f909SAndy Grover dest_tpg->se_tpg_tfo->get_fabric_name(), 1685c66ac9dbSNicholas Bellinger dest_rtpi); 1686c66ac9dbSNicholas Bellinger 1687c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1688c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1689de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 1690de103c93SChristoph Hellwig goto out_unmap; 1691c66ac9dbSNicholas Bellinger } 1692c66ac9dbSNicholas Bellinger 1693de103c93SChristoph Hellwig if (core_scsi3_lunacl_depend_item(dest_se_deve)) { 16946708bb27SAndy Grover pr_err("core_scsi3_lunacl_depend_item()" 1695c66ac9dbSNicholas Bellinger " failed\n"); 169629a05deeSNicholas Bellinger kref_put(&dest_se_deve->pr_kref, target_pr_kref_release); 1697c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1698c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1699de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1700de103c93SChristoph Hellwig goto out_unmap; 1701c66ac9dbSNicholas Bellinger } 17028b1e1244SAndy Grover 17036708bb27SAndy Grover pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node: %s" 1704f2d30680SHannes Reinecke " dest_se_deve mapped_lun: %llu\n", 1705e3d6f909SAndy Grover dest_tpg->se_tpg_tfo->get_fabric_name(), 1706c66ac9dbSNicholas Bellinger dest_node_acl->initiatorname, dest_se_deve->mapped_lun); 17078b1e1244SAndy Grover 1708c66ac9dbSNicholas Bellinger /* 1709c66ac9dbSNicholas Bellinger * Skip any TransportIDs that already have a registration for 1710c66ac9dbSNicholas Bellinger * this target port. 1711c66ac9dbSNicholas Bellinger */ 1712c66ac9dbSNicholas Bellinger pr_reg_e = __core_scsi3_locate_pr_reg(dev, dest_node_acl, 1713c66ac9dbSNicholas Bellinger iport_ptr); 1714c66ac9dbSNicholas Bellinger if (pr_reg_e) { 1715c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_e); 1716c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1717c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1718c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1719c66ac9dbSNicholas Bellinger ptr += tid_len; 1720c66ac9dbSNicholas Bellinger tpdl -= tid_len; 1721c66ac9dbSNicholas Bellinger tid_len = 0; 1722c66ac9dbSNicholas Bellinger continue; 1723c66ac9dbSNicholas Bellinger } 1724c66ac9dbSNicholas Bellinger /* 1725c66ac9dbSNicholas Bellinger * Allocate a struct pr_transport_id_holder and setup 1726c66ac9dbSNicholas Bellinger * the dest_node_acl and dest_se_deve pointers for the 1727c66ac9dbSNicholas Bellinger * loop below. 1728c66ac9dbSNicholas Bellinger */ 1729c66ac9dbSNicholas Bellinger tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), 1730c66ac9dbSNicholas Bellinger GFP_KERNEL); 17316708bb27SAndy Grover if (!tidh_new) { 17326708bb27SAndy Grover pr_err("Unable to allocate tidh_new\n"); 1733c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1734c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1735c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1736de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1737de103c93SChristoph Hellwig goto out_unmap; 1738c66ac9dbSNicholas Bellinger } 1739c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&tidh_new->dest_list); 1740c66ac9dbSNicholas Bellinger tidh_new->dest_tpg = dest_tpg; 1741c66ac9dbSNicholas Bellinger tidh_new->dest_node_acl = dest_node_acl; 1742c66ac9dbSNicholas Bellinger tidh_new->dest_se_deve = dest_se_deve; 1743c66ac9dbSNicholas Bellinger 1744c66ac9dbSNicholas Bellinger /* 1745c66ac9dbSNicholas Bellinger * Allocate, but do NOT add the registration for the 1746c66ac9dbSNicholas Bellinger * TransportID referenced SCSI Initiator port. This 1747c66ac9dbSNicholas Bellinger * done because of the following from spc4r17 in section 1748c66ac9dbSNicholas Bellinger * 6.14.3 wrt SPEC_I_PT: 1749c66ac9dbSNicholas Bellinger * 1750c66ac9dbSNicholas Bellinger * "If a registration fails for any initiator port (e.g., if th 1751c66ac9dbSNicholas Bellinger * logical unit does not have enough resources available to 1752c66ac9dbSNicholas Bellinger * hold the registration information), no registrations shall be 1753c66ac9dbSNicholas Bellinger * made, and the command shall be terminated with 1754c66ac9dbSNicholas Bellinger * CHECK CONDITION status." 1755c66ac9dbSNicholas Bellinger * 1756c66ac9dbSNicholas Bellinger * That means we call __core_scsi3_alloc_registration() here, 1757c66ac9dbSNicholas Bellinger * and then call __core_scsi3_add_registration() in the 1758c66ac9dbSNicholas Bellinger * 2nd loop which will never fail. 1759c66ac9dbSNicholas Bellinger */ 176079dc9c9eSNicholas Bellinger dest_lun = rcu_dereference_check(dest_se_deve->se_lun, 176179dc9c9eSNicholas Bellinger atomic_read(&dest_se_deve->pr_kref.refcount) != 0); 176279dc9c9eSNicholas Bellinger 17635951146dSAndy Grover dest_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev, 176479dc9c9eSNicholas Bellinger dest_node_acl, dest_lun, dest_se_deve, 176579dc9c9eSNicholas Bellinger dest_se_deve->mapped_lun, iport_ptr, 1766c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl); 17676708bb27SAndy Grover if (!dest_pr_reg) { 1768c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1769c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1770c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1771c66ac9dbSNicholas Bellinger kfree(tidh_new); 1772de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 1773de103c93SChristoph Hellwig goto out_unmap; 1774c66ac9dbSNicholas Bellinger } 1775c66ac9dbSNicholas Bellinger tidh_new->dest_pr_reg = dest_pr_reg; 1776c66ac9dbSNicholas Bellinger list_add_tail(&tidh_new->dest_list, &tid_dest_list); 1777c66ac9dbSNicholas Bellinger 1778c66ac9dbSNicholas Bellinger ptr += tid_len; 1779c66ac9dbSNicholas Bellinger tpdl -= tid_len; 1780c66ac9dbSNicholas Bellinger tid_len = 0; 1781c66ac9dbSNicholas Bellinger 1782c66ac9dbSNicholas Bellinger } 178305d1c7c0SAndy Grover 17844949314cSAndy Grover transport_kunmap_data_sg(cmd); 178505d1c7c0SAndy Grover 1786c66ac9dbSNicholas Bellinger /* 1787c66ac9dbSNicholas Bellinger * Go ahead and create a registrations from tid_dest_list for the 1788c66ac9dbSNicholas Bellinger * SPEC_I_PT provided TransportID for the *tidh referenced dest_node_acl 1789c66ac9dbSNicholas Bellinger * and dest_se_deve. 1790c66ac9dbSNicholas Bellinger * 1791c66ac9dbSNicholas Bellinger * The SA Reservation Key from the PROUT is set for the 1792c66ac9dbSNicholas Bellinger * registration, and ALL_TG_PT is also passed. ALL_TG_PT=1 1793c66ac9dbSNicholas Bellinger * means that the TransportID Initiator port will be 1794c66ac9dbSNicholas Bellinger * registered on all of the target ports in the SCSI target device 1795c66ac9dbSNicholas Bellinger * ALL_TG_PT=0 means the registration will only be for the 1796c66ac9dbSNicholas Bellinger * SCSI target port the PROUT REGISTER with SPEC_I_PT=1 1797c66ac9dbSNicholas Bellinger * was received. 1798c66ac9dbSNicholas Bellinger */ 1799c66ac9dbSNicholas Bellinger list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) { 1800c66ac9dbSNicholas Bellinger dest_tpg = tidh->dest_tpg; 1801c66ac9dbSNicholas Bellinger dest_node_acl = tidh->dest_node_acl; 1802c66ac9dbSNicholas Bellinger dest_se_deve = tidh->dest_se_deve; 1803c66ac9dbSNicholas Bellinger dest_pr_reg = tidh->dest_pr_reg; 1804c66ac9dbSNicholas Bellinger 1805c66ac9dbSNicholas Bellinger list_del(&tidh->dest_list); 1806c66ac9dbSNicholas Bellinger kfree(tidh); 1807c66ac9dbSNicholas Bellinger 1808c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1809d2843c17SAndy Grover core_pr_dump_initiator_port(dest_pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1810c66ac9dbSNicholas Bellinger 18115951146dSAndy Grover __core_scsi3_add_registration(cmd->se_dev, dest_node_acl, 1812c66ac9dbSNicholas Bellinger dest_pr_reg, 0, 0); 1813c66ac9dbSNicholas Bellinger 18146708bb27SAndy Grover pr_debug("SPC-3 PR [%s] SPEC_I_PT: Successfully" 1815c66ac9dbSNicholas Bellinger " registered Transport ID for Node: %s%s Mapped LUN:" 1816f2d30680SHannes Reinecke " %llu\n", dest_tpg->se_tpg_tfo->get_fabric_name(), 181779dc9c9eSNicholas Bellinger dest_node_acl->initiatorname, i_buf, (dest_se_deve) ? 181879dc9c9eSNicholas Bellinger dest_se_deve->mapped_lun : 0); 1819c66ac9dbSNicholas Bellinger 18203ccd6e83SNicholas Bellinger if (!dest_se_deve) { 18213ccd6e83SNicholas Bellinger kref_put(&local_pr_reg->pr_reg_deve->pr_kref, 18223ccd6e83SNicholas Bellinger target_pr_kref_release); 1823c66ac9dbSNicholas Bellinger continue; 18243ccd6e83SNicholas Bellinger } 1825c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1826c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1827c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1828c66ac9dbSNicholas Bellinger } 1829c66ac9dbSNicholas Bellinger 1830c66ac9dbSNicholas Bellinger return 0; 1831de103c93SChristoph Hellwig out_unmap: 18324949314cSAndy Grover transport_kunmap_data_sg(cmd); 1833de103c93SChristoph Hellwig out: 1834c66ac9dbSNicholas Bellinger /* 1835c66ac9dbSNicholas Bellinger * For the failure case, release everything from tid_dest_list 1836c66ac9dbSNicholas Bellinger * including *dest_pr_reg and the configfs dependances.. 1837c66ac9dbSNicholas Bellinger */ 1838c66ac9dbSNicholas Bellinger list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) { 1839c66ac9dbSNicholas Bellinger dest_tpg = tidh->dest_tpg; 1840c66ac9dbSNicholas Bellinger dest_node_acl = tidh->dest_node_acl; 1841c66ac9dbSNicholas Bellinger dest_se_deve = tidh->dest_se_deve; 1842c66ac9dbSNicholas Bellinger dest_pr_reg = tidh->dest_pr_reg; 1843c66ac9dbSNicholas Bellinger 1844c66ac9dbSNicholas Bellinger list_del(&tidh->dest_list); 1845c66ac9dbSNicholas Bellinger kfree(tidh); 1846c66ac9dbSNicholas Bellinger /* 1847c66ac9dbSNicholas Bellinger * Release any extra ALL_TG_PT=1 registrations for 1848c66ac9dbSNicholas Bellinger * the SPEC_I_PT=1 case. 1849c66ac9dbSNicholas Bellinger */ 1850c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, 1851c66ac9dbSNicholas Bellinger &dest_pr_reg->pr_reg_atp_list, 1852c66ac9dbSNicholas Bellinger pr_reg_atp_mem_list) { 1853c66ac9dbSNicholas Bellinger list_del(&pr_reg_tmp->pr_reg_atp_mem_list); 1854c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); 1855c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp); 1856c66ac9dbSNicholas Bellinger } 1857c66ac9dbSNicholas Bellinger 1858c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, dest_pr_reg); 1859c66ac9dbSNicholas Bellinger 18603ccd6e83SNicholas Bellinger if (!dest_se_deve) { 18613ccd6e83SNicholas Bellinger kref_put(&local_pr_reg->pr_reg_deve->pr_kref, 18623ccd6e83SNicholas Bellinger target_pr_kref_release); 1863c66ac9dbSNicholas Bellinger continue; 18643ccd6e83SNicholas Bellinger } 1865c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1866c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1867c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1868c66ac9dbSNicholas Bellinger } 1869c66ac9dbSNicholas Bellinger return ret; 1870c66ac9dbSNicholas Bellinger } 1871c66ac9dbSNicholas Bellinger 18723c8a6228SAndy Grover static int core_scsi3_update_aptpl_buf( 1873c66ac9dbSNicholas Bellinger struct se_device *dev, 1874c66ac9dbSNicholas Bellinger unsigned char *buf, 18750607decdSAndy Grover u32 pr_aptpl_buf_len) 1876c66ac9dbSNicholas Bellinger { 1877c66ac9dbSNicholas Bellinger struct se_portal_group *tpg; 1878c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 1879c66ac9dbSNicholas Bellinger unsigned char tmp[512], isid_buf[32]; 1880c66ac9dbSNicholas Bellinger ssize_t len = 0; 1881c66ac9dbSNicholas Bellinger int reg_count = 0; 18823c8a6228SAndy Grover int ret = 0; 1883c66ac9dbSNicholas Bellinger 18843c8a6228SAndy Grover spin_lock(&dev->dev_reservation_lock); 18853c8a6228SAndy Grover spin_lock(&dev->t10_pr.registration_lock); 1886c66ac9dbSNicholas Bellinger /* 1887c66ac9dbSNicholas Bellinger * Walk the registration list.. 1888c66ac9dbSNicholas Bellinger */ 18890fd97ccfSChristoph Hellwig list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 1890c66ac9dbSNicholas Bellinger pr_reg_list) { 1891c66ac9dbSNicholas Bellinger 1892c66ac9dbSNicholas Bellinger tmp[0] = '\0'; 1893c66ac9dbSNicholas Bellinger isid_buf[0] = '\0'; 1894c66ac9dbSNicholas Bellinger tpg = pr_reg->pr_reg_nacl->se_tpg; 1895c66ac9dbSNicholas Bellinger /* 1896c66ac9dbSNicholas Bellinger * Write out any ISID value to APTPL metadata that was included 1897c66ac9dbSNicholas Bellinger * in the original registration. 1898c66ac9dbSNicholas Bellinger */ 1899c66ac9dbSNicholas Bellinger if (pr_reg->isid_present_at_reg) 1900c66ac9dbSNicholas Bellinger snprintf(isid_buf, 32, "initiator_sid=%s\n", 1901c66ac9dbSNicholas Bellinger pr_reg->pr_reg_isid); 1902c66ac9dbSNicholas Bellinger /* 1903c66ac9dbSNicholas Bellinger * Include special metadata if the pr_reg matches the 1904c66ac9dbSNicholas Bellinger * reservation holder. 1905c66ac9dbSNicholas Bellinger */ 1906c66ac9dbSNicholas Bellinger if (dev->dev_pr_res_holder == pr_reg) { 1907c66ac9dbSNicholas Bellinger snprintf(tmp, 512, "PR_REG_START: %d" 1908c66ac9dbSNicholas Bellinger "\ninitiator_fabric=%s\n" 1909c66ac9dbSNicholas Bellinger "initiator_node=%s\n%s" 1910c66ac9dbSNicholas Bellinger "sa_res_key=%llu\n" 1911c66ac9dbSNicholas Bellinger "res_holder=1\nres_type=%02x\n" 1912c66ac9dbSNicholas Bellinger "res_scope=%02x\nres_all_tg_pt=%d\n" 1913f2d30680SHannes Reinecke "mapped_lun=%llu\n", reg_count, 1914e3d6f909SAndy Grover tpg->se_tpg_tfo->get_fabric_name(), 1915c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->initiatorname, isid_buf, 1916c66ac9dbSNicholas Bellinger pr_reg->pr_res_key, pr_reg->pr_res_type, 1917c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope, pr_reg->pr_reg_all_tg_pt, 1918c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun); 1919c66ac9dbSNicholas Bellinger } else { 1920c66ac9dbSNicholas Bellinger snprintf(tmp, 512, "PR_REG_START: %d\n" 1921c66ac9dbSNicholas Bellinger "initiator_fabric=%s\ninitiator_node=%s\n%s" 1922c66ac9dbSNicholas Bellinger "sa_res_key=%llu\nres_holder=0\n" 1923f2d30680SHannes Reinecke "res_all_tg_pt=%d\nmapped_lun=%llu\n", 1924e3d6f909SAndy Grover reg_count, tpg->se_tpg_tfo->get_fabric_name(), 1925c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->initiatorname, isid_buf, 1926c66ac9dbSNicholas Bellinger pr_reg->pr_res_key, pr_reg->pr_reg_all_tg_pt, 1927c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun); 1928c66ac9dbSNicholas Bellinger } 1929c66ac9dbSNicholas Bellinger 193060d645a4SDan Carpenter if ((len + strlen(tmp) >= pr_aptpl_buf_len)) { 1931f161d4b4SNicholas Bellinger pr_err("Unable to update renaming APTPL metadata," 1932f161d4b4SNicholas Bellinger " reallocating larger buffer\n"); 19333c8a6228SAndy Grover ret = -EMSGSIZE; 19343c8a6228SAndy Grover goto out; 1935c66ac9dbSNicholas Bellinger } 1936c66ac9dbSNicholas Bellinger len += sprintf(buf+len, "%s", tmp); 1937c66ac9dbSNicholas Bellinger 1938c66ac9dbSNicholas Bellinger /* 1939c66ac9dbSNicholas Bellinger * Include information about the associated SCSI target port. 1940c66ac9dbSNicholas Bellinger */ 1941c66ac9dbSNicholas Bellinger snprintf(tmp, 512, "target_fabric=%s\ntarget_node=%s\n" 1942f2d30680SHannes Reinecke "tpgt=%hu\nport_rtpi=%hu\ntarget_lun=%llu\nPR_REG_END:" 1943e3d6f909SAndy Grover " %d\n", tpg->se_tpg_tfo->get_fabric_name(), 1944e3d6f909SAndy Grover tpg->se_tpg_tfo->tpg_get_wwn(tpg), 1945e3d6f909SAndy Grover tpg->se_tpg_tfo->tpg_get_tag(tpg), 194679dc9c9eSNicholas Bellinger pr_reg->tg_pt_sep_rtpi, pr_reg->pr_aptpl_target_lun, 194779dc9c9eSNicholas Bellinger reg_count); 1948c66ac9dbSNicholas Bellinger 194960d645a4SDan Carpenter if ((len + strlen(tmp) >= pr_aptpl_buf_len)) { 1950f161d4b4SNicholas Bellinger pr_err("Unable to update renaming APTPL metadata," 1951f161d4b4SNicholas Bellinger " reallocating larger buffer\n"); 19523c8a6228SAndy Grover ret = -EMSGSIZE; 19533c8a6228SAndy Grover goto out; 1954c66ac9dbSNicholas Bellinger } 1955c66ac9dbSNicholas Bellinger len += sprintf(buf+len, "%s", tmp); 1956c66ac9dbSNicholas Bellinger reg_count++; 1957c66ac9dbSNicholas Bellinger } 1958c66ac9dbSNicholas Bellinger 19596708bb27SAndy Grover if (!reg_count) 1960c66ac9dbSNicholas Bellinger len += sprintf(buf+len, "No Registrations or Reservations"); 1961c66ac9dbSNicholas Bellinger 19623c8a6228SAndy Grover out: 19633c8a6228SAndy Grover spin_unlock(&dev->t10_pr.registration_lock); 1964c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1965c66ac9dbSNicholas Bellinger 1966c66ac9dbSNicholas Bellinger return ret; 1967c66ac9dbSNicholas Bellinger } 1968c66ac9dbSNicholas Bellinger 1969c66ac9dbSNicholas Bellinger static int __core_scsi3_write_aptpl_to_file( 1970c66ac9dbSNicholas Bellinger struct se_device *dev, 19714dee96fbSAndy Grover unsigned char *buf) 1972c66ac9dbSNicholas Bellinger { 19730fd97ccfSChristoph Hellwig struct t10_wwn *wwn = &dev->t10_wwn; 1974c66ac9dbSNicholas Bellinger struct file *file; 1975c66ac9dbSNicholas Bellinger int flags = O_RDWR | O_CREAT | O_TRUNC; 1976c66ac9dbSNicholas Bellinger char path[512]; 19774dee96fbSAndy Grover u32 pr_aptpl_buf_len; 1978c66ac9dbSNicholas Bellinger int ret; 1979c66ac9dbSNicholas Bellinger 1980c66ac9dbSNicholas Bellinger memset(path, 0, 512); 1981c66ac9dbSNicholas Bellinger 198260d645a4SDan Carpenter if (strlen(&wwn->unit_serial[0]) >= 512) { 19836708bb27SAndy Grover pr_err("WWN value for struct se_device does not fit" 1984c66ac9dbSNicholas Bellinger " into path buffer\n"); 1985e3d6f909SAndy Grover return -EMSGSIZE; 1986c66ac9dbSNicholas Bellinger } 1987c66ac9dbSNicholas Bellinger 1988c66ac9dbSNicholas Bellinger snprintf(path, 512, "/var/target/pr/aptpl_%s", &wwn->unit_serial[0]); 1989c66ac9dbSNicholas Bellinger file = filp_open(path, flags, 0600); 19900e9b10a9SAl Viro if (IS_ERR(file)) { 19916708bb27SAndy Grover pr_err("filp_open(%s) for APTPL metadata" 1992c66ac9dbSNicholas Bellinger " failed\n", 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 19980e9b10a9SAl Viro ret = kernel_write(file, buf, pr_aptpl_buf_len, 0); 1999c66ac9dbSNicholas Bellinger 20000e9b10a9SAl Viro if (ret < 0) 20016708bb27SAndy Grover pr_debug("Error writing APTPL metadata file: %s\n", path); 20020e9b10a9SAl Viro fput(file); 2003c66ac9dbSNicholas Bellinger 2004f730f915SGera Kazakov return (ret < 0) ? -EIO : 0; 2005c66ac9dbSNicholas Bellinger } 2006c66ac9dbSNicholas Bellinger 2007c66ac9dbSNicholas Bellinger /* 2008459f213bSAndy Grover * Clear the APTPL metadata if APTPL has been disabled, otherwise 2009459f213bSAndy Grover * write out the updated metadata to struct file for this SCSI device. 2010c66ac9dbSNicholas Bellinger */ 20118a391857SNicholas Bellinger static sense_reason_t core_scsi3_update_and_write_aptpl(struct se_device *dev, bool aptpl) 2012459f213bSAndy Grover { 20138a391857SNicholas Bellinger unsigned char *buf; 2014f161d4b4SNicholas Bellinger int rc, len = PR_APTPL_BUF_LEN; 2015459f213bSAndy Grover 2016459f213bSAndy Grover if (!aptpl) { 2017459f213bSAndy Grover char *null_buf = "No Registrations or Reservations\n"; 2018459f213bSAndy Grover 20198a391857SNicholas Bellinger rc = __core_scsi3_write_aptpl_to_file(dev, null_buf); 2020459f213bSAndy Grover dev->t10_pr.pr_aptpl_active = 0; 2021459f213bSAndy Grover pr_debug("SPC-3 PR: Set APTPL Bit Deactivated\n"); 20228a391857SNicholas Bellinger 20238a391857SNicholas Bellinger if (rc) 20248a391857SNicholas Bellinger return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 20258a391857SNicholas Bellinger 20268a391857SNicholas Bellinger return 0; 20278a391857SNicholas Bellinger } 2028f161d4b4SNicholas Bellinger retry: 2029f161d4b4SNicholas Bellinger buf = vzalloc(len); 2030459f213bSAndy Grover if (!buf) 20318a391857SNicholas Bellinger return TCM_OUT_OF_RESOURCES; 2032459f213bSAndy Grover 2033f161d4b4SNicholas Bellinger rc = core_scsi3_update_aptpl_buf(dev, buf, len); 20348a391857SNicholas Bellinger if (rc < 0) { 2035f161d4b4SNicholas Bellinger vfree(buf); 2036f161d4b4SNicholas Bellinger len *= 2; 2037f161d4b4SNicholas Bellinger goto retry; 20380607decdSAndy Grover } 2039de103c93SChristoph Hellwig 20408a391857SNicholas Bellinger rc = __core_scsi3_write_aptpl_to_file(dev, buf); 20418a391857SNicholas Bellinger if (rc != 0) { 2042459f213bSAndy Grover pr_err("SPC-3 PR: Could not update APTPL\n"); 2043f161d4b4SNicholas Bellinger vfree(buf); 20448a391857SNicholas Bellinger return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2045459f213bSAndy Grover } 20468a391857SNicholas Bellinger dev->t10_pr.pr_aptpl_active = 1; 2047f161d4b4SNicholas Bellinger vfree(buf); 20488a391857SNicholas Bellinger pr_debug("SPC-3 PR: Set APTPL Bit Activated\n"); 20498a391857SNicholas Bellinger return 0; 2050c66ac9dbSNicholas Bellinger } 2051c66ac9dbSNicholas Bellinger 2052de103c93SChristoph Hellwig static sense_reason_t 2053de103c93SChristoph Hellwig core_scsi3_emulate_pro_register(struct se_cmd *cmd, u64 res_key, u64 sa_res_key, 2054bc118fe4SAndy Grover bool aptpl, bool all_tg_pt, bool spec_i_pt, enum register_type register_type) 2055c66ac9dbSNicholas Bellinger { 2056e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 20575951146dSAndy Grover struct se_device *dev = cmd->se_dev; 2058e3d6f909SAndy Grover struct se_lun *se_lun = cmd->se_lun; 2059c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg; 2060bc118fe4SAndy Grover struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_reg_tmp; 20610fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 2062c66ac9dbSNicholas Bellinger unsigned char isid_buf[PR_REG_ISID_LEN], *isid_ptr = NULL; 2063a0d50f62SHannes Reinecke sense_reason_t ret = TCM_NO_SENSE; 2064fc09149dSNicholas Bellinger int pr_holder = 0, type; 2065c66ac9dbSNicholas Bellinger 20666708bb27SAndy Grover if (!se_sess || !se_lun) { 20676708bb27SAndy Grover pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); 2068de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2069c66ac9dbSNicholas Bellinger } 2070c66ac9dbSNicholas Bellinger se_tpg = se_sess->se_tpg; 2071c66ac9dbSNicholas Bellinger 2072e3d6f909SAndy Grover if (se_tpg->se_tpg_tfo->sess_get_initiator_sid) { 2073c66ac9dbSNicholas Bellinger memset(&isid_buf[0], 0, PR_REG_ISID_LEN); 2074e3d6f909SAndy Grover se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, &isid_buf[0], 2075c66ac9dbSNicholas Bellinger PR_REG_ISID_LEN); 2076c66ac9dbSNicholas Bellinger isid_ptr = &isid_buf[0]; 2077c66ac9dbSNicholas Bellinger } 2078c66ac9dbSNicholas Bellinger /* 2079c66ac9dbSNicholas Bellinger * Follow logic from spc4r17 Section 5.7.7, Register Behaviors Table 47 2080c66ac9dbSNicholas Bellinger */ 2081bc118fe4SAndy Grover pr_reg = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess); 2082bc118fe4SAndy Grover if (!pr_reg) { 2083c66ac9dbSNicholas Bellinger if (res_key) { 20846708bb27SAndy Grover pr_warn("SPC-3 PR: Reservation Key non-zero" 2085c66ac9dbSNicholas Bellinger " for SA REGISTER, returning CONFLICT\n"); 2086de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 2087c66ac9dbSNicholas Bellinger } 2088c66ac9dbSNicholas Bellinger /* 2089c66ac9dbSNicholas Bellinger * Do nothing but return GOOD status. 2090c66ac9dbSNicholas Bellinger */ 20916708bb27SAndy Grover if (!sa_res_key) 209203e98c9eSNicholas Bellinger return 0; 2093c66ac9dbSNicholas Bellinger 20946708bb27SAndy Grover if (!spec_i_pt) { 2095c66ac9dbSNicholas Bellinger /* 2096c66ac9dbSNicholas Bellinger * Perform the Service Action REGISTER on the Initiator 2097c66ac9dbSNicholas Bellinger * Port Endpoint that the PRO was received from on the 2098c66ac9dbSNicholas Bellinger * Logical Unit of the SCSI device server. 2099c66ac9dbSNicholas Bellinger */ 2100de103c93SChristoph Hellwig if (core_scsi3_alloc_registration(cmd->se_dev, 210179dc9c9eSNicholas Bellinger se_sess->se_node_acl, cmd->se_lun, 210279dc9c9eSNicholas Bellinger NULL, cmd->orig_fe_lun, isid_ptr, 2103c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl, 210433ce6a87SAndy Grover register_type, 0)) { 21056708bb27SAndy Grover pr_err("Unable to allocate" 2106c66ac9dbSNicholas Bellinger " struct t10_pr_registration\n"); 2107de103c93SChristoph Hellwig return TCM_INVALID_PARAMETER_LIST; 2108c66ac9dbSNicholas Bellinger } 2109c66ac9dbSNicholas Bellinger } else { 2110c66ac9dbSNicholas Bellinger /* 2111c66ac9dbSNicholas Bellinger * Register both the Initiator port that received 2112c66ac9dbSNicholas Bellinger * PROUT SA REGISTER + SPEC_I_PT=1 and extract SCSI 2113c66ac9dbSNicholas Bellinger * TransportID from Parameter list and loop through 2114c66ac9dbSNicholas Bellinger * fabric dependent parameter list while calling 2115c66ac9dbSNicholas Bellinger * logic from of core_scsi3_alloc_registration() for 2116c66ac9dbSNicholas Bellinger * each TransportID provided SCSI Initiator Port/Device 2117c66ac9dbSNicholas Bellinger */ 2118c66ac9dbSNicholas Bellinger ret = core_scsi3_decode_spec_i_port(cmd, se_tpg, 2119c66ac9dbSNicholas Bellinger isid_ptr, sa_res_key, all_tg_pt, aptpl); 2120c66ac9dbSNicholas Bellinger if (ret != 0) 2121c66ac9dbSNicholas Bellinger return ret; 2122c66ac9dbSNicholas Bellinger } 2123459f213bSAndy Grover return core_scsi3_update_and_write_aptpl(dev, aptpl); 2124de103c93SChristoph Hellwig } 2125de103c93SChristoph Hellwig 2126bc118fe4SAndy Grover /* ok, existing registration */ 2127c66ac9dbSNicholas Bellinger 2128bc118fe4SAndy Grover if ((register_type == REGISTER) && (res_key != pr_reg->pr_res_key)) { 21296708bb27SAndy Grover pr_err("SPC-3 PR REGISTER: Received" 2130c66ac9dbSNicholas Bellinger " res_key: 0x%016Lx does not match" 2131c66ac9dbSNicholas Bellinger " existing SA REGISTER res_key:" 2132c66ac9dbSNicholas Bellinger " 0x%016Lx\n", res_key, 2133c66ac9dbSNicholas Bellinger pr_reg->pr_res_key); 2134de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 2135bc118fe4SAndy Grover goto out; 2136c66ac9dbSNicholas Bellinger } 2137de103c93SChristoph Hellwig 2138c66ac9dbSNicholas Bellinger if (spec_i_pt) { 21391f070cc2SAndy Grover pr_err("SPC-3 PR REGISTER: SPEC_I_PT" 21401f070cc2SAndy Grover " set on a registered nexus\n"); 2141de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 2142bc118fe4SAndy Grover goto out; 2143c66ac9dbSNicholas Bellinger } 2144de103c93SChristoph Hellwig 2145c66ac9dbSNicholas Bellinger /* 2146c66ac9dbSNicholas Bellinger * An existing ALL_TG_PT=1 registration being released 2147c66ac9dbSNicholas Bellinger * must also set ALL_TG_PT=1 in the incoming PROUT. 2148c66ac9dbSNicholas Bellinger */ 21491f070cc2SAndy Grover if (pr_reg->pr_reg_all_tg_pt && !all_tg_pt) { 21501f070cc2SAndy Grover pr_err("SPC-3 PR REGISTER: ALL_TG_PT=1" 2151c66ac9dbSNicholas Bellinger " registration exists, but ALL_TG_PT=1 bit not" 2152c66ac9dbSNicholas Bellinger " present in received PROUT\n"); 2153de103c93SChristoph Hellwig ret = TCM_INVALID_CDB_FIELD; 2154bc118fe4SAndy Grover goto out; 2155c66ac9dbSNicholas Bellinger } 2156de103c93SChristoph Hellwig 2157c66ac9dbSNicholas Bellinger /* 215851d9c41dSAndy Grover * sa_res_key=1 Change Reservation Key for registered I_T Nexus. 2159c66ac9dbSNicholas Bellinger */ 216051d9c41dSAndy Grover if (sa_res_key) { 216151d9c41dSAndy Grover /* 216251d9c41dSAndy Grover * Increment PRgeneration counter for struct se_device" 216351d9c41dSAndy Grover * upon a successful REGISTER, see spc4r17 section 6.3.2 216451d9c41dSAndy Grover * READ_KEYS service action. 216551d9c41dSAndy Grover */ 216651d9c41dSAndy Grover pr_reg->pr_res_generation = core_scsi3_pr_generation(cmd->se_dev); 216751d9c41dSAndy Grover pr_reg->pr_res_key = sa_res_key; 216851d9c41dSAndy Grover pr_debug("SPC-3 PR [%s] REGISTER%s: Changed Reservation" 216951d9c41dSAndy Grover " Key for %s to: 0x%016Lx PRgeneration:" 217051d9c41dSAndy Grover " 0x%08x\n", cmd->se_tfo->get_fabric_name(), 217151d9c41dSAndy Grover (register_type == REGISTER_AND_IGNORE_EXISTING_KEY) ? "_AND_IGNORE_EXISTING_KEY" : "", 217251d9c41dSAndy Grover pr_reg->pr_reg_nacl->initiatorname, 217351d9c41dSAndy Grover pr_reg->pr_res_key, pr_reg->pr_res_generation); 217451d9c41dSAndy Grover 217551d9c41dSAndy Grover } else { 217651d9c41dSAndy Grover /* 217751d9c41dSAndy Grover * sa_res_key=0 Unregister Reservation Key for registered I_T Nexus. 217851d9c41dSAndy Grover */ 21796c3c9baaSNicholas Bellinger type = pr_reg->pr_res_type; 21806c3c9baaSNicholas Bellinger pr_holder = core_scsi3_check_implicit_release(cmd->se_dev, 21816c3c9baaSNicholas Bellinger pr_reg); 2182c66ac9dbSNicholas Bellinger if (pr_holder < 0) { 2183de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 2184bc118fe4SAndy Grover goto out; 2185c66ac9dbSNicholas Bellinger } 2186c66ac9dbSNicholas Bellinger 2187c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 2188c66ac9dbSNicholas Bellinger /* 2189c66ac9dbSNicholas Bellinger * Release all ALL_TG_PT=1 for the matching SCSI Initiator Port 2190c66ac9dbSNicholas Bellinger * and matching pr_res_key. 2191c66ac9dbSNicholas Bellinger */ 2192c66ac9dbSNicholas Bellinger if (pr_reg->pr_reg_all_tg_pt) { 2193c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg_p, pr_reg_tmp, 2194c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, 2195c66ac9dbSNicholas Bellinger pr_reg_list) { 2196c66ac9dbSNicholas Bellinger 21976708bb27SAndy Grover if (!pr_reg_p->pr_reg_all_tg_pt) 2198c66ac9dbSNicholas Bellinger continue; 2199c66ac9dbSNicholas Bellinger if (pr_reg_p->pr_res_key != res_key) 2200c66ac9dbSNicholas Bellinger continue; 2201c66ac9dbSNicholas Bellinger if (pr_reg == pr_reg_p) 2202c66ac9dbSNicholas Bellinger continue; 2203c66ac9dbSNicholas Bellinger if (strcmp(pr_reg->pr_reg_nacl->initiatorname, 2204c66ac9dbSNicholas Bellinger pr_reg_p->pr_reg_nacl->initiatorname)) 2205c66ac9dbSNicholas Bellinger continue; 2206c66ac9dbSNicholas Bellinger 2207c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, 2208c66ac9dbSNicholas Bellinger pr_reg_p, NULL, 0); 2209c66ac9dbSNicholas Bellinger } 2210c66ac9dbSNicholas Bellinger } 2211de103c93SChristoph Hellwig 2212c66ac9dbSNicholas Bellinger /* 2213c66ac9dbSNicholas Bellinger * Release the calling I_T Nexus registration now.. 2214c66ac9dbSNicholas Bellinger */ 2215de103c93SChristoph Hellwig __core_scsi3_free_registration(cmd->se_dev, pr_reg, NULL, 1); 2216fc09149dSNicholas Bellinger pr_reg = NULL; 2217de103c93SChristoph Hellwig 2218c66ac9dbSNicholas Bellinger /* 2219c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.11.3 Unregistering 2220c66ac9dbSNicholas Bellinger * 2221c66ac9dbSNicholas Bellinger * If the persistent reservation is a registrants only 2222c66ac9dbSNicholas Bellinger * type, the device server shall establish a unit 2223c66ac9dbSNicholas Bellinger * attention condition for the initiator port associated 2224c66ac9dbSNicholas Bellinger * with every registered I_T nexus except for the I_T 2225c66ac9dbSNicholas Bellinger * nexus on which the PERSISTENT RESERVE OUT command was 2226c66ac9dbSNicholas Bellinger * received, with the additional sense code set to 2227c66ac9dbSNicholas Bellinger * RESERVATIONS RELEASED. 2228c66ac9dbSNicholas Bellinger */ 2229c66ac9dbSNicholas Bellinger if (pr_holder && 2230fc09149dSNicholas Bellinger (type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY || 2231fc09149dSNicholas Bellinger type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY)) { 2232c66ac9dbSNicholas Bellinger list_for_each_entry(pr_reg_p, 2233c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, 2234c66ac9dbSNicholas Bellinger pr_reg_list) { 2235c66ac9dbSNicholas Bellinger 2236c51c8e7bSHannes Reinecke target_ua_allocate_lun( 2237c66ac9dbSNicholas Bellinger pr_reg_p->pr_reg_nacl, 2238c66ac9dbSNicholas Bellinger pr_reg_p->pr_res_mapped_lun, 2239c66ac9dbSNicholas Bellinger 0x2A, 2240c66ac9dbSNicholas Bellinger ASCQ_2AH_RESERVATIONS_RELEASED); 2241c66ac9dbSNicholas Bellinger } 2242c66ac9dbSNicholas Bellinger } 224351d9c41dSAndy Grover 2244c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 2245de103c93SChristoph Hellwig } 2246de103c93SChristoph Hellwig 2247459f213bSAndy Grover ret = core_scsi3_update_and_write_aptpl(dev, aptpl); 2248c66ac9dbSNicholas Bellinger 2249bc118fe4SAndy Grover out: 2250fc09149dSNicholas Bellinger if (pr_reg) 2251c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2252de103c93SChristoph Hellwig return ret; 2253c66ac9dbSNicholas Bellinger } 2254c66ac9dbSNicholas Bellinger 2255c66ac9dbSNicholas Bellinger unsigned char *core_scsi3_pr_dump_type(int type) 2256c66ac9dbSNicholas Bellinger { 2257c66ac9dbSNicholas Bellinger switch (type) { 2258c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE: 2259c66ac9dbSNicholas Bellinger return "Write Exclusive Access"; 2260c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS: 2261c66ac9dbSNicholas Bellinger return "Exclusive Access"; 2262c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: 2263c66ac9dbSNicholas Bellinger return "Write Exclusive Access, Registrants Only"; 2264c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: 2265c66ac9dbSNicholas Bellinger return "Exclusive Access, Registrants Only"; 2266c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: 2267c66ac9dbSNicholas Bellinger return "Write Exclusive Access, All Registrants"; 2268c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: 2269c66ac9dbSNicholas Bellinger return "Exclusive Access, All Registrants"; 2270c66ac9dbSNicholas Bellinger default: 2271c66ac9dbSNicholas Bellinger break; 2272c66ac9dbSNicholas Bellinger } 2273c66ac9dbSNicholas Bellinger 2274c66ac9dbSNicholas Bellinger return "Unknown SPC-3 PR Type"; 2275c66ac9dbSNicholas Bellinger } 2276c66ac9dbSNicholas Bellinger 2277de103c93SChristoph Hellwig static sense_reason_t 2278de103c93SChristoph Hellwig core_scsi3_pro_reserve(struct se_cmd *cmd, int type, int scope, u64 res_key) 2279c66ac9dbSNicholas Bellinger { 2280de103c93SChristoph Hellwig struct se_device *dev = cmd->se_dev; 2281e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 2282e3d6f909SAndy Grover struct se_lun *se_lun = cmd->se_lun; 2283c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_res_holder; 22840fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 2285c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 2286de103c93SChristoph Hellwig sense_reason_t ret; 2287c66ac9dbSNicholas Bellinger 2288c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 2289c66ac9dbSNicholas Bellinger 22906708bb27SAndy Grover if (!se_sess || !se_lun) { 22916708bb27SAndy Grover pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); 2292de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2293c66ac9dbSNicholas Bellinger } 2294c66ac9dbSNicholas Bellinger /* 2295c66ac9dbSNicholas Bellinger * Locate the existing *pr_reg via struct se_node_acl pointers 2296c66ac9dbSNicholas Bellinger */ 22975951146dSAndy Grover pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, 2298c66ac9dbSNicholas Bellinger se_sess); 22996708bb27SAndy Grover if (!pr_reg) { 23006708bb27SAndy Grover pr_err("SPC-3 PR: Unable to locate" 2301c66ac9dbSNicholas Bellinger " PR_REGISTERED *pr_reg for RESERVE\n"); 2302de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2303c66ac9dbSNicholas Bellinger } 2304c66ac9dbSNicholas Bellinger /* 2305c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2306c66ac9dbSNicholas Bellinger * 2307c66ac9dbSNicholas Bellinger * An application client creates a persistent reservation by issuing 2308c66ac9dbSNicholas Bellinger * a PERSISTENT RESERVE OUT command with RESERVE service action through 2309c66ac9dbSNicholas Bellinger * a registered I_T nexus with the following parameters: 2310c66ac9dbSNicholas Bellinger * a) RESERVATION KEY set to the value of the reservation key that is 2311c66ac9dbSNicholas Bellinger * registered with the logical unit for the I_T nexus; and 2312c66ac9dbSNicholas Bellinger */ 2313c66ac9dbSNicholas Bellinger if (res_key != pr_reg->pr_res_key) { 23146708bb27SAndy Grover pr_err("SPC-3 PR RESERVE: Received res_key: 0x%016Lx" 2315c66ac9dbSNicholas Bellinger " does not match existing SA REGISTER res_key:" 2316c66ac9dbSNicholas Bellinger " 0x%016Lx\n", res_key, pr_reg->pr_res_key); 2317de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 2318de103c93SChristoph Hellwig goto out_put_pr_reg; 2319c66ac9dbSNicholas Bellinger } 2320c66ac9dbSNicholas Bellinger /* 2321c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2322c66ac9dbSNicholas Bellinger * 2323c66ac9dbSNicholas Bellinger * From above: 2324c66ac9dbSNicholas Bellinger * b) TYPE field and SCOPE field set to the persistent reservation 2325c66ac9dbSNicholas Bellinger * being created. 2326c66ac9dbSNicholas Bellinger * 2327c66ac9dbSNicholas Bellinger * Only one persistent reservation is allowed at a time per logical unit 2328c66ac9dbSNicholas Bellinger * and that persistent reservation has a scope of LU_SCOPE. 2329c66ac9dbSNicholas Bellinger */ 2330c66ac9dbSNicholas Bellinger if (scope != PR_SCOPE_LU_SCOPE) { 23316708bb27SAndy Grover pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope); 2332de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 2333de103c93SChristoph Hellwig goto out_put_pr_reg; 2334c66ac9dbSNicholas Bellinger } 2335c66ac9dbSNicholas Bellinger /* 2336c66ac9dbSNicholas Bellinger * See if we have an existing PR reservation holder pointer at 2337c66ac9dbSNicholas Bellinger * struct se_device->dev_pr_res_holder in the form struct t10_pr_registration 2338c66ac9dbSNicholas Bellinger * *pr_res_holder. 2339c66ac9dbSNicholas Bellinger */ 2340c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 2341c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 2342ee1b1b9cSAndy Grover if (pr_res_holder) { 2343c66ac9dbSNicholas Bellinger /* 2344c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2345c66ac9dbSNicholas Bellinger * 2346c66ac9dbSNicholas Bellinger * If the device server receives a PERSISTENT RESERVE OUT 2347c66ac9dbSNicholas Bellinger * command from an I_T nexus other than a persistent reservation 2348c66ac9dbSNicholas Bellinger * holder (see 5.7.10) that attempts to create a persistent 2349c66ac9dbSNicholas Bellinger * reservation when a persistent reservation already exists for 2350c66ac9dbSNicholas Bellinger * the logical unit, then the command shall be completed with 2351c66ac9dbSNicholas Bellinger * RESERVATION CONFLICT status. 2352c66ac9dbSNicholas Bellinger */ 2353e673dc92SIlias Tsitsimpis if (!is_reservation_holder(pr_res_holder, pr_reg)) { 2354c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 23556708bb27SAndy Grover pr_err("SPC-3 PR: Attempted RESERVE from" 2356c66ac9dbSNicholas Bellinger " [%s]: %s while reservation already held by" 2357c66ac9dbSNicholas Bellinger " [%s]: %s, returning RESERVATION_CONFLICT\n", 2358e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), 2359c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, 2360e3d6f909SAndy Grover pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 2361c66ac9dbSNicholas Bellinger pr_res_holder->pr_reg_nacl->initiatorname); 2362c66ac9dbSNicholas Bellinger 2363c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2364de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 2365de103c93SChristoph Hellwig goto out_put_pr_reg; 2366c66ac9dbSNicholas Bellinger } 2367c66ac9dbSNicholas Bellinger /* 2368c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2369c66ac9dbSNicholas Bellinger * 2370c66ac9dbSNicholas Bellinger * If a persistent reservation holder attempts to modify the 2371c66ac9dbSNicholas Bellinger * type or scope of an existing persistent reservation, the 2372c66ac9dbSNicholas Bellinger * command shall be completed with RESERVATION CONFLICT status. 2373c66ac9dbSNicholas Bellinger */ 2374c66ac9dbSNicholas Bellinger if ((pr_res_holder->pr_res_type != type) || 2375c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_scope != scope)) { 2376c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 23776708bb27SAndy Grover pr_err("SPC-3 PR: Attempted RESERVE from" 2378c66ac9dbSNicholas Bellinger " [%s]: %s trying to change TYPE and/or SCOPE," 2379c66ac9dbSNicholas Bellinger " while reservation already held by [%s]: %s," 2380c66ac9dbSNicholas Bellinger " returning RESERVATION_CONFLICT\n", 2381e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), 2382c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, 2383e3d6f909SAndy Grover pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 2384c66ac9dbSNicholas Bellinger pr_res_holder->pr_reg_nacl->initiatorname); 2385c66ac9dbSNicholas Bellinger 2386c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2387de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 2388de103c93SChristoph Hellwig goto out_put_pr_reg; 2389c66ac9dbSNicholas Bellinger } 2390c66ac9dbSNicholas Bellinger /* 2391c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2392c66ac9dbSNicholas Bellinger * 2393c66ac9dbSNicholas Bellinger * If the device server receives a PERSISTENT RESERVE OUT 2394c66ac9dbSNicholas Bellinger * command with RESERVE service action where the TYPE field and 2395c66ac9dbSNicholas Bellinger * the SCOPE field contain the same values as the existing type 2396c66ac9dbSNicholas Bellinger * and scope from a persistent reservation holder, it shall not 2397c66ac9dbSNicholas Bellinger * make any change to the existing persistent reservation and 2398c66ac9dbSNicholas Bellinger * shall completethe command with GOOD status. 2399c66ac9dbSNicholas Bellinger */ 2400c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2401de103c93SChristoph Hellwig ret = 0; 2402de103c93SChristoph Hellwig goto out_put_pr_reg; 2403c66ac9dbSNicholas Bellinger } 2404c66ac9dbSNicholas Bellinger /* 2405c66ac9dbSNicholas Bellinger * Otherwise, our *pr_reg becomes the PR reservation holder for said 2406c66ac9dbSNicholas Bellinger * TYPE/SCOPE. Also set the received scope and type in *pr_reg. 2407c66ac9dbSNicholas Bellinger */ 2408c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope = scope; 2409c66ac9dbSNicholas Bellinger pr_reg->pr_res_type = type; 2410c66ac9dbSNicholas Bellinger pr_reg->pr_res_holder = 1; 2411c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = pr_reg; 2412d2843c17SAndy Grover core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 2413c66ac9dbSNicholas Bellinger 24146708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: RESERVE created new" 2415c66ac9dbSNicholas Bellinger " reservation holder TYPE: %s ALL_TG_PT: %d\n", 2416e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), core_scsi3_pr_dump_type(type), 2417c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); 24186708bb27SAndy Grover pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n", 2419e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), 2420c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, 2421d2843c17SAndy Grover i_buf); 2422c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2423c66ac9dbSNicholas Bellinger 2424459f213bSAndy Grover if (pr_tmpl->pr_aptpl_active) 2425459f213bSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, true); 2426c66ac9dbSNicholas Bellinger 2427de103c93SChristoph Hellwig ret = 0; 2428de103c93SChristoph Hellwig out_put_pr_reg: 2429de103c93SChristoph Hellwig core_scsi3_put_pr_reg(pr_reg); 2430de103c93SChristoph Hellwig return ret; 2431de103c93SChristoph Hellwig } 2432de103c93SChristoph Hellwig 2433de103c93SChristoph Hellwig static sense_reason_t 2434de103c93SChristoph Hellwig core_scsi3_emulate_pro_reserve(struct se_cmd *cmd, int type, int scope, 2435c66ac9dbSNicholas Bellinger u64 res_key) 2436c66ac9dbSNicholas Bellinger { 2437c66ac9dbSNicholas Bellinger switch (type) { 2438c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE: 2439c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS: 2440c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: 2441c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: 2442c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: 2443c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: 2444de103c93SChristoph Hellwig return core_scsi3_pro_reserve(cmd, type, scope, res_key); 2445c66ac9dbSNicholas Bellinger default: 24466708bb27SAndy Grover pr_err("SPC-3 PR: Unknown Service Action RESERVE Type:" 2447c66ac9dbSNicholas Bellinger " 0x%02x\n", type); 2448de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 2449c66ac9dbSNicholas Bellinger } 2450c66ac9dbSNicholas Bellinger } 2451c66ac9dbSNicholas Bellinger 2452c66ac9dbSNicholas Bellinger /* 2453c66ac9dbSNicholas Bellinger * Called with struct se_device->dev_reservation_lock held. 2454c66ac9dbSNicholas Bellinger */ 2455c66ac9dbSNicholas Bellinger static void __core_scsi3_complete_pro_release( 2456c66ac9dbSNicholas Bellinger struct se_device *dev, 2457c66ac9dbSNicholas Bellinger struct se_node_acl *se_nacl, 2458c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 24596c3c9baaSNicholas Bellinger int explicit, 24606c3c9baaSNicholas Bellinger int unreg) 2461c66ac9dbSNicholas Bellinger { 24629ac8928eSChristoph Hellwig const struct target_core_fabric_ops *tfo = se_nacl->se_tpg->se_tpg_tfo; 2463c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 24646c3c9baaSNicholas Bellinger int pr_res_type = 0, pr_res_scope = 0; 2465c66ac9dbSNicholas Bellinger 2466c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 2467d2843c17SAndy Grover core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 2468c66ac9dbSNicholas Bellinger /* 2469c66ac9dbSNicholas Bellinger * Go ahead and release the current PR reservation holder. 24706c3c9baaSNicholas Bellinger * If an All Registrants reservation is currently active and 24716c3c9baaSNicholas Bellinger * a unregister operation is requested, replace the current 24726c3c9baaSNicholas Bellinger * dev_pr_res_holder with another active registration. 2473c66ac9dbSNicholas Bellinger */ 24746c3c9baaSNicholas Bellinger if (dev->dev_pr_res_holder) { 24756c3c9baaSNicholas Bellinger pr_res_type = dev->dev_pr_res_holder->pr_res_type; 24766c3c9baaSNicholas Bellinger pr_res_scope = dev->dev_pr_res_holder->pr_res_scope; 24776c3c9baaSNicholas Bellinger dev->dev_pr_res_holder->pr_res_type = 0; 24786c3c9baaSNicholas Bellinger dev->dev_pr_res_holder->pr_res_scope = 0; 24796c3c9baaSNicholas Bellinger dev->dev_pr_res_holder->pr_res_holder = 0; 2480c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = NULL; 24816c3c9baaSNicholas Bellinger } 24826c3c9baaSNicholas Bellinger if (!unreg) 24836c3c9baaSNicholas Bellinger goto out; 2484c66ac9dbSNicholas Bellinger 24856c3c9baaSNicholas Bellinger spin_lock(&dev->t10_pr.registration_lock); 24866c3c9baaSNicholas Bellinger list_del_init(&pr_reg->pr_reg_list); 24876c3c9baaSNicholas Bellinger /* 24886c3c9baaSNicholas Bellinger * If the I_T nexus is a reservation holder, the persistent reservation 24896c3c9baaSNicholas Bellinger * is of an all registrants type, and the I_T nexus is the last remaining 24906c3c9baaSNicholas Bellinger * registered I_T nexus, then the device server shall also release the 24916c3c9baaSNicholas Bellinger * persistent reservation. 24926c3c9baaSNicholas Bellinger */ 24936c3c9baaSNicholas Bellinger if (!list_empty(&dev->t10_pr.registration_list) && 24946c3c9baaSNicholas Bellinger ((pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 24956c3c9baaSNicholas Bellinger (pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG))) { 24966c3c9baaSNicholas Bellinger dev->dev_pr_res_holder = 24976c3c9baaSNicholas Bellinger list_entry(dev->t10_pr.registration_list.next, 24986c3c9baaSNicholas Bellinger struct t10_pr_registration, pr_reg_list); 24996c3c9baaSNicholas Bellinger dev->dev_pr_res_holder->pr_res_type = pr_res_type; 25006c3c9baaSNicholas Bellinger dev->dev_pr_res_holder->pr_res_scope = pr_res_scope; 25016c3c9baaSNicholas Bellinger dev->dev_pr_res_holder->pr_res_holder = 1; 25026c3c9baaSNicholas Bellinger } 25036c3c9baaSNicholas Bellinger spin_unlock(&dev->t10_pr.registration_lock); 25046c3c9baaSNicholas Bellinger out: 25056c3c9baaSNicholas Bellinger if (!dev->dev_pr_res_holder) { 25066708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: %s RELEASE cleared" 2507c66ac9dbSNicholas Bellinger " reservation holder TYPE: %s ALL_TG_PT: %d\n", 25086c3c9baaSNicholas Bellinger tfo->get_fabric_name(), (explicit) ? "explicit" : 25096c3c9baaSNicholas Bellinger "implicit", core_scsi3_pr_dump_type(pr_res_type), 2510c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); 25116c3c9baaSNicholas Bellinger } 25126708bb27SAndy Grover pr_debug("SPC-3 PR [%s] RELEASE Node: %s%s\n", 2513c66ac9dbSNicholas Bellinger tfo->get_fabric_name(), se_nacl->initiatorname, 2514d2843c17SAndy Grover i_buf); 2515c66ac9dbSNicholas Bellinger /* 2516c66ac9dbSNicholas Bellinger * Clear TYPE and SCOPE for the next PROUT Service Action: RESERVE 2517c66ac9dbSNicholas Bellinger */ 2518c66ac9dbSNicholas Bellinger pr_reg->pr_res_holder = pr_reg->pr_res_type = pr_reg->pr_res_scope = 0; 2519c66ac9dbSNicholas Bellinger } 2520c66ac9dbSNicholas Bellinger 2521de103c93SChristoph Hellwig static sense_reason_t 2522de103c93SChristoph Hellwig core_scsi3_emulate_pro_release(struct se_cmd *cmd, int type, int scope, 2523c66ac9dbSNicholas Bellinger u64 res_key) 2524c66ac9dbSNicholas Bellinger { 2525c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 2526e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 2527e3d6f909SAndy Grover struct se_lun *se_lun = cmd->se_lun; 2528c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_res_holder; 25290fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 2530de103c93SChristoph Hellwig sense_reason_t ret = 0; 2531c66ac9dbSNicholas Bellinger 25326708bb27SAndy Grover if (!se_sess || !se_lun) { 25336708bb27SAndy Grover pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); 2534de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2535c66ac9dbSNicholas Bellinger } 2536c66ac9dbSNicholas Bellinger /* 2537c66ac9dbSNicholas Bellinger * Locate the existing *pr_reg via struct se_node_acl pointers 2538c66ac9dbSNicholas Bellinger */ 2539c66ac9dbSNicholas Bellinger pr_reg = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess); 25406708bb27SAndy Grover if (!pr_reg) { 25416708bb27SAndy Grover pr_err("SPC-3 PR: Unable to locate" 2542c66ac9dbSNicholas Bellinger " PR_REGISTERED *pr_reg for RELEASE\n"); 2543de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2544c66ac9dbSNicholas Bellinger } 2545c66ac9dbSNicholas Bellinger /* 2546c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.11.2 Releasing: 2547c66ac9dbSNicholas Bellinger * 2548c66ac9dbSNicholas Bellinger * If there is no persistent reservation or in response to a persistent 2549c66ac9dbSNicholas Bellinger * reservation release request from a registered I_T nexus that is not a 2550c66ac9dbSNicholas Bellinger * persistent reservation holder (see 5.7.10), the device server shall 2551c66ac9dbSNicholas Bellinger * do the following: 2552c66ac9dbSNicholas Bellinger * 2553c66ac9dbSNicholas Bellinger * a) Not release the persistent reservation, if any; 2554c66ac9dbSNicholas Bellinger * b) Not remove any registrations; and 2555c66ac9dbSNicholas Bellinger * c) Complete the command with GOOD status. 2556c66ac9dbSNicholas Bellinger */ 2557c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 2558c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 25596708bb27SAndy Grover if (!pr_res_holder) { 2560c66ac9dbSNicholas Bellinger /* 2561c66ac9dbSNicholas Bellinger * No persistent reservation, return GOOD status. 2562c66ac9dbSNicholas Bellinger */ 2563c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2564bb7a8c8eSNicholas Bellinger goto out_put_pr_reg; 2565c66ac9dbSNicholas Bellinger } 2566c66ac9dbSNicholas Bellinger 2567e673dc92SIlias Tsitsimpis if (!is_reservation_holder(pr_res_holder, pr_reg)) { 2568c66ac9dbSNicholas Bellinger /* 2569c66ac9dbSNicholas Bellinger * Release request from a registered I_T nexus that is not a 2570c66ac9dbSNicholas Bellinger * persistent reservation holder. return GOOD status. 2571c66ac9dbSNicholas Bellinger */ 2572c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2573de103c93SChristoph Hellwig goto out_put_pr_reg; 2574c66ac9dbSNicholas Bellinger } 2575de103c93SChristoph Hellwig 2576c66ac9dbSNicholas Bellinger /* 2577c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.11.2 Releasing: 2578c66ac9dbSNicholas Bellinger * 2579c66ac9dbSNicholas Bellinger * Only the persistent reservation holder (see 5.7.10) is allowed to 2580c66ac9dbSNicholas Bellinger * release a persistent reservation. 2581c66ac9dbSNicholas Bellinger * 2582c66ac9dbSNicholas Bellinger * An application client releases the persistent reservation by issuing 2583c66ac9dbSNicholas Bellinger * a PERSISTENT RESERVE OUT command with RELEASE service action through 2584c66ac9dbSNicholas Bellinger * an I_T nexus that is a persistent reservation holder with the 2585c66ac9dbSNicholas Bellinger * following parameters: 2586c66ac9dbSNicholas Bellinger * 2587c66ac9dbSNicholas Bellinger * a) RESERVATION KEY field set to the value of the reservation key 2588c66ac9dbSNicholas Bellinger * that is registered with the logical unit for the I_T nexus; 2589c66ac9dbSNicholas Bellinger */ 2590c66ac9dbSNicholas Bellinger if (res_key != pr_reg->pr_res_key) { 25916708bb27SAndy Grover pr_err("SPC-3 PR RELEASE: Received res_key: 0x%016Lx" 2592c66ac9dbSNicholas Bellinger " does not match existing SA REGISTER res_key:" 2593c66ac9dbSNicholas Bellinger " 0x%016Lx\n", res_key, pr_reg->pr_res_key); 2594c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2595de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 2596de103c93SChristoph Hellwig goto out_put_pr_reg; 2597c66ac9dbSNicholas Bellinger } 2598c66ac9dbSNicholas Bellinger /* 2599c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.11.2 Releasing and above: 2600c66ac9dbSNicholas Bellinger * 2601c66ac9dbSNicholas Bellinger * b) TYPE field and SCOPE field set to match the persistent 2602c66ac9dbSNicholas Bellinger * reservation being released. 2603c66ac9dbSNicholas Bellinger */ 2604c66ac9dbSNicholas Bellinger if ((pr_res_holder->pr_res_type != type) || 2605c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_scope != scope)) { 2606c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 26076708bb27SAndy Grover pr_err("SPC-3 PR RELEASE: Attempted to release" 2608c66ac9dbSNicholas Bellinger " reservation from [%s]: %s with different TYPE " 2609c66ac9dbSNicholas Bellinger "and/or SCOPE while reservation already held by" 2610c66ac9dbSNicholas Bellinger " [%s]: %s, returning RESERVATION_CONFLICT\n", 2611e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), 2612c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, 2613e3d6f909SAndy Grover pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 2614c66ac9dbSNicholas Bellinger pr_res_holder->pr_reg_nacl->initiatorname); 2615c66ac9dbSNicholas Bellinger 2616c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2617de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 2618de103c93SChristoph Hellwig goto out_put_pr_reg; 2619c66ac9dbSNicholas Bellinger } 2620c66ac9dbSNicholas Bellinger /* 2621c66ac9dbSNicholas Bellinger * In response to a persistent reservation release request from the 2622c66ac9dbSNicholas Bellinger * persistent reservation holder the device server shall perform a 2623c66ac9dbSNicholas Bellinger * release by doing the following as an uninterrupted series of actions: 2624c66ac9dbSNicholas Bellinger * a) Release the persistent reservation; 2625c66ac9dbSNicholas Bellinger * b) Not remove any registration(s); 2626c66ac9dbSNicholas Bellinger * c) If the released persistent reservation is a registrants only type 2627c66ac9dbSNicholas Bellinger * or all registrants type persistent reservation, 2628c66ac9dbSNicholas Bellinger * the device server shall establish a unit attention condition for 2629c66ac9dbSNicholas Bellinger * the initiator port associated with every regis- 2630c66ac9dbSNicholas Bellinger * tered I_T nexus other than I_T nexus on which the PERSISTENT 2631c66ac9dbSNicholas Bellinger * RESERVE OUT command with RELEASE service action was received, 2632c66ac9dbSNicholas Bellinger * with the additional sense code set to RESERVATIONS RELEASED; and 2633c66ac9dbSNicholas Bellinger * d) If the persistent reservation is of any other type, the device 2634c66ac9dbSNicholas Bellinger * server shall not establish a unit attention condition. 2635c66ac9dbSNicholas Bellinger */ 2636c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, se_sess->se_node_acl, 26376c3c9baaSNicholas Bellinger pr_reg, 1, 0); 2638c66ac9dbSNicholas Bellinger 2639c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2640c66ac9dbSNicholas Bellinger 2641c66ac9dbSNicholas Bellinger if ((type != PR_TYPE_WRITE_EXCLUSIVE_REGONLY) && 2642c66ac9dbSNicholas Bellinger (type != PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) && 2643c66ac9dbSNicholas Bellinger (type != PR_TYPE_WRITE_EXCLUSIVE_ALLREG) && 2644c66ac9dbSNicholas Bellinger (type != PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { 2645c66ac9dbSNicholas Bellinger /* 2646c66ac9dbSNicholas Bellinger * If no UNIT ATTENTION conditions will be established for 2647c66ac9dbSNicholas Bellinger * PR_TYPE_WRITE_EXCLUSIVE or PR_TYPE_EXCLUSIVE_ACCESS 2648c66ac9dbSNicholas Bellinger * go ahead and check for APTPL=1 update+write below 2649c66ac9dbSNicholas Bellinger */ 2650c66ac9dbSNicholas Bellinger goto write_aptpl; 2651c66ac9dbSNicholas Bellinger } 2652c66ac9dbSNicholas Bellinger 2653c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 2654c66ac9dbSNicholas Bellinger list_for_each_entry(pr_reg_p, &pr_tmpl->registration_list, 2655c66ac9dbSNicholas Bellinger pr_reg_list) { 2656c66ac9dbSNicholas Bellinger /* 2657c66ac9dbSNicholas Bellinger * Do not establish a UNIT ATTENTION condition 2658c66ac9dbSNicholas Bellinger * for the calling I_T Nexus 2659c66ac9dbSNicholas Bellinger */ 2660c66ac9dbSNicholas Bellinger if (pr_reg_p == pr_reg) 2661c66ac9dbSNicholas Bellinger continue; 2662c66ac9dbSNicholas Bellinger 2663c51c8e7bSHannes Reinecke target_ua_allocate_lun(pr_reg_p->pr_reg_nacl, 2664c66ac9dbSNicholas Bellinger pr_reg_p->pr_res_mapped_lun, 2665c66ac9dbSNicholas Bellinger 0x2A, ASCQ_2AH_RESERVATIONS_RELEASED); 2666c66ac9dbSNicholas Bellinger } 2667c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 2668c66ac9dbSNicholas Bellinger 2669c66ac9dbSNicholas Bellinger write_aptpl: 2670459f213bSAndy Grover if (pr_tmpl->pr_aptpl_active) 2671459f213bSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, true); 2672459f213bSAndy Grover 2673de103c93SChristoph Hellwig out_put_pr_reg: 2674c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2675de103c93SChristoph Hellwig return ret; 2676c66ac9dbSNicholas Bellinger } 2677c66ac9dbSNicholas Bellinger 2678de103c93SChristoph Hellwig static sense_reason_t 2679de103c93SChristoph Hellwig core_scsi3_emulate_pro_clear(struct se_cmd *cmd, u64 res_key) 2680c66ac9dbSNicholas Bellinger { 2681c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 2682c66ac9dbSNicholas Bellinger struct se_node_acl *pr_reg_nacl; 2683e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 26840fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 2685c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder; 2686f2d30680SHannes Reinecke u64 pr_res_mapped_lun = 0; 2687c66ac9dbSNicholas Bellinger int calling_it_nexus = 0; 2688c66ac9dbSNicholas Bellinger /* 2689c66ac9dbSNicholas Bellinger * Locate the existing *pr_reg via struct se_node_acl pointers 2690c66ac9dbSNicholas Bellinger */ 26915951146dSAndy Grover pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, 2692c66ac9dbSNicholas Bellinger se_sess->se_node_acl, se_sess); 26936708bb27SAndy Grover if (!pr_reg_n) { 26946708bb27SAndy Grover pr_err("SPC-3 PR: Unable to locate" 2695c66ac9dbSNicholas Bellinger " PR_REGISTERED *pr_reg for CLEAR\n"); 2696de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2697c66ac9dbSNicholas Bellinger } 2698c66ac9dbSNicholas Bellinger /* 2699c66ac9dbSNicholas Bellinger * From spc4r17 section 5.7.11.6, Clearing: 2700c66ac9dbSNicholas Bellinger * 2701c66ac9dbSNicholas Bellinger * Any application client may release the persistent reservation and 2702c66ac9dbSNicholas Bellinger * remove all registrations from a device server by issuing a 2703c66ac9dbSNicholas Bellinger * PERSISTENT RESERVE OUT command with CLEAR service action through a 2704c66ac9dbSNicholas Bellinger * registered I_T nexus with the following parameter: 2705c66ac9dbSNicholas Bellinger * 2706c66ac9dbSNicholas Bellinger * a) RESERVATION KEY field set to the value of the reservation key 2707c66ac9dbSNicholas Bellinger * that is registered with the logical unit for the I_T nexus. 2708c66ac9dbSNicholas Bellinger */ 2709c66ac9dbSNicholas Bellinger if (res_key != pr_reg_n->pr_res_key) { 27106708bb27SAndy Grover pr_err("SPC-3 PR REGISTER: Received" 2711c66ac9dbSNicholas Bellinger " res_key: 0x%016Lx does not match" 2712c66ac9dbSNicholas Bellinger " existing SA REGISTER res_key:" 2713c66ac9dbSNicholas Bellinger " 0x%016Lx\n", res_key, pr_reg_n->pr_res_key); 2714c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 2715de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 2716c66ac9dbSNicholas Bellinger } 2717c66ac9dbSNicholas Bellinger /* 2718c66ac9dbSNicholas Bellinger * a) Release the persistent reservation, if any; 2719c66ac9dbSNicholas Bellinger */ 2720c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 2721c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 2722c66ac9dbSNicholas Bellinger if (pr_res_holder) { 2723c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 2724c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, pr_res_nacl, 27256c3c9baaSNicholas Bellinger pr_res_holder, 0, 0); 2726c66ac9dbSNicholas Bellinger } 2727c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2728c66ac9dbSNicholas Bellinger /* 2729c66ac9dbSNicholas Bellinger * b) Remove all registration(s) (see spc4r17 5.7.7); 2730c66ac9dbSNicholas Bellinger */ 2731c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 2732c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 2733c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 2734c66ac9dbSNicholas Bellinger 2735c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 2736c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 2737c66ac9dbSNicholas Bellinger pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; 2738c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, NULL, 2739c66ac9dbSNicholas Bellinger calling_it_nexus); 2740c66ac9dbSNicholas Bellinger /* 2741c66ac9dbSNicholas Bellinger * e) Establish a unit attention condition for the initiator 2742c66ac9dbSNicholas Bellinger * port associated with every registered I_T nexus other 2743c66ac9dbSNicholas Bellinger * than the I_T nexus on which the PERSISTENT RESERVE OUT 2744c66ac9dbSNicholas Bellinger * command with CLEAR service action was received, with the 2745c66ac9dbSNicholas Bellinger * additional sense code set to RESERVATIONS PREEMPTED. 2746c66ac9dbSNicholas Bellinger */ 27476708bb27SAndy Grover if (!calling_it_nexus) 2748c51c8e7bSHannes Reinecke target_ua_allocate_lun(pr_reg_nacl, pr_res_mapped_lun, 2749c66ac9dbSNicholas Bellinger 0x2A, ASCQ_2AH_RESERVATIONS_PREEMPTED); 2750c66ac9dbSNicholas Bellinger } 2751c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 2752c66ac9dbSNicholas Bellinger 27536708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: CLEAR complete\n", 2754e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name()); 2755c66ac9dbSNicholas Bellinger 2756459f213bSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, false); 2757c66ac9dbSNicholas Bellinger 2758c66ac9dbSNicholas Bellinger core_scsi3_pr_generation(dev); 2759c66ac9dbSNicholas Bellinger return 0; 2760c66ac9dbSNicholas Bellinger } 2761c66ac9dbSNicholas Bellinger 2762c66ac9dbSNicholas Bellinger /* 2763c66ac9dbSNicholas Bellinger * Called with struct se_device->dev_reservation_lock held. 2764c66ac9dbSNicholas Bellinger */ 2765c66ac9dbSNicholas Bellinger static void __core_scsi3_complete_pro_preempt( 2766c66ac9dbSNicholas Bellinger struct se_device *dev, 2767c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 2768c66ac9dbSNicholas Bellinger struct list_head *preempt_and_abort_list, 2769c66ac9dbSNicholas Bellinger int type, 2770c66ac9dbSNicholas Bellinger int scope, 277133ce6a87SAndy Grover enum preempt_type preempt_type) 2772c66ac9dbSNicholas Bellinger { 2773c66ac9dbSNicholas Bellinger struct se_node_acl *nacl = pr_reg->pr_reg_nacl; 27749ac8928eSChristoph Hellwig const struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; 2775c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 2776c66ac9dbSNicholas Bellinger 2777c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 2778d2843c17SAndy Grover core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 2779c66ac9dbSNicholas Bellinger /* 2780125d0119SHannes Reinecke * Do an implicit RELEASE of the existing reservation. 2781c66ac9dbSNicholas Bellinger */ 2782c66ac9dbSNicholas Bellinger if (dev->dev_pr_res_holder) 2783c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, nacl, 27846c3c9baaSNicholas Bellinger dev->dev_pr_res_holder, 0, 0); 2785c66ac9dbSNicholas Bellinger 2786c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = pr_reg; 2787c66ac9dbSNicholas Bellinger pr_reg->pr_res_holder = 1; 2788c66ac9dbSNicholas Bellinger pr_reg->pr_res_type = type; 2789c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope = scope; 2790c66ac9dbSNicholas Bellinger 27916708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: PREEMPT%s created new" 2792c66ac9dbSNicholas Bellinger " reservation holder TYPE: %s ALL_TG_PT: %d\n", 279333ce6a87SAndy Grover tfo->get_fabric_name(), (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : "", 2794c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(type), 2795c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); 27966708bb27SAndy Grover pr_debug("SPC-3 PR [%s] PREEMPT%s from Node: %s%s\n", 279733ce6a87SAndy Grover tfo->get_fabric_name(), (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : "", 2798d2843c17SAndy Grover nacl->initiatorname, i_buf); 2799c66ac9dbSNicholas Bellinger /* 2800c66ac9dbSNicholas Bellinger * For PREEMPT_AND_ABORT, add the preempting reservation's 2801c66ac9dbSNicholas Bellinger * struct t10_pr_registration to the list that will be compared 2802c66ac9dbSNicholas Bellinger * against received CDBs.. 2803c66ac9dbSNicholas Bellinger */ 2804c66ac9dbSNicholas Bellinger if (preempt_and_abort_list) 2805c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg->pr_reg_abort_list, 2806c66ac9dbSNicholas Bellinger preempt_and_abort_list); 2807c66ac9dbSNicholas Bellinger } 2808c66ac9dbSNicholas Bellinger 2809c66ac9dbSNicholas Bellinger static void core_scsi3_release_preempt_and_abort( 2810c66ac9dbSNicholas Bellinger struct list_head *preempt_and_abort_list, 2811c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg_holder) 2812c66ac9dbSNicholas Bellinger { 2813c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp; 2814c66ac9dbSNicholas Bellinger 2815c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, preempt_and_abort_list, 2816c66ac9dbSNicholas Bellinger pr_reg_abort_list) { 2817c66ac9dbSNicholas Bellinger 2818c66ac9dbSNicholas Bellinger list_del(&pr_reg->pr_reg_abort_list); 2819c66ac9dbSNicholas Bellinger if (pr_reg_holder == pr_reg) 2820c66ac9dbSNicholas Bellinger continue; 2821c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_holder) { 28226708bb27SAndy Grover pr_warn("pr_reg->pr_res_holder still set\n"); 2823c66ac9dbSNicholas Bellinger continue; 2824c66ac9dbSNicholas Bellinger } 2825c66ac9dbSNicholas Bellinger 2826c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve = NULL; 2827c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = NULL; 2828c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 2829c66ac9dbSNicholas Bellinger } 2830c66ac9dbSNicholas Bellinger } 2831c66ac9dbSNicholas Bellinger 2832de103c93SChristoph Hellwig static sense_reason_t 2833de103c93SChristoph Hellwig core_scsi3_pro_preempt(struct se_cmd *cmd, int type, int scope, u64 res_key, 283433ce6a87SAndy Grover u64 sa_res_key, enum preempt_type preempt_type) 2835c66ac9dbSNicholas Bellinger { 28365951146dSAndy Grover struct se_device *dev = cmd->se_dev; 2837c66ac9dbSNicholas Bellinger struct se_node_acl *pr_reg_nacl; 2838e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 2839d0f474e5SRoland Dreier LIST_HEAD(preempt_and_abort_list); 2840c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder; 28410fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 2842f2d30680SHannes Reinecke u64 pr_res_mapped_lun = 0; 2843b6932ee3SSteven Allen int all_reg = 0, calling_it_nexus = 0; 2844b6932ee3SSteven Allen bool sa_res_key_unmatched = sa_res_key != 0; 2845de103c93SChristoph Hellwig int prh_type = 0, prh_scope = 0; 2846c66ac9dbSNicholas Bellinger 2847de103c93SChristoph Hellwig if (!se_sess) 2848de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2849c66ac9dbSNicholas Bellinger 28505951146dSAndy Grover pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, 2851c66ac9dbSNicholas Bellinger se_sess); 28526708bb27SAndy Grover if (!pr_reg_n) { 28536708bb27SAndy Grover pr_err("SPC-3 PR: Unable to locate" 2854c66ac9dbSNicholas Bellinger " PR_REGISTERED *pr_reg for PREEMPT%s\n", 285533ce6a87SAndy Grover (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : ""); 2856de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 2857c66ac9dbSNicholas Bellinger } 2858c66ac9dbSNicholas Bellinger if (pr_reg_n->pr_res_key != res_key) { 2859c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 2860de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 2861c66ac9dbSNicholas Bellinger } 2862c66ac9dbSNicholas Bellinger if (scope != PR_SCOPE_LU_SCOPE) { 28636708bb27SAndy Grover pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope); 2864c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 2865de103c93SChristoph Hellwig return TCM_INVALID_PARAMETER_LIST; 2866c66ac9dbSNicholas Bellinger } 2867c66ac9dbSNicholas Bellinger 2868c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 2869c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 2870c66ac9dbSNicholas Bellinger if (pr_res_holder && 2871c66ac9dbSNicholas Bellinger ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 2872c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG))) 2873c66ac9dbSNicholas Bellinger all_reg = 1; 2874c66ac9dbSNicholas Bellinger 28756708bb27SAndy Grover if (!all_reg && !sa_res_key) { 2876c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2877c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 2878de103c93SChristoph Hellwig return TCM_INVALID_PARAMETER_LIST; 2879c66ac9dbSNicholas Bellinger } 2880c66ac9dbSNicholas Bellinger /* 2881c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.11.4.4 Removing Registrations: 2882c66ac9dbSNicholas Bellinger * 2883c66ac9dbSNicholas Bellinger * If the SERVICE ACTION RESERVATION KEY field does not identify a 2884c66ac9dbSNicholas Bellinger * persistent reservation holder or there is no persistent reservation 2885c66ac9dbSNicholas Bellinger * holder (i.e., there is no persistent reservation), then the device 2886c66ac9dbSNicholas Bellinger * server shall perform a preempt by doing the following in an 2887c66ac9dbSNicholas Bellinger * uninterrupted series of actions. (See below..) 2888c66ac9dbSNicholas Bellinger */ 28896708bb27SAndy Grover if (!pr_res_holder || (pr_res_holder->pr_res_key != sa_res_key)) { 2890c66ac9dbSNicholas Bellinger /* 2891c66ac9dbSNicholas Bellinger * No existing or SA Reservation Key matching reservations.. 2892c66ac9dbSNicholas Bellinger * 2893c66ac9dbSNicholas Bellinger * PROUT SA PREEMPT with All Registrant type reservations are 2894c66ac9dbSNicholas Bellinger * allowed to be processed without a matching SA Reservation Key 2895c66ac9dbSNicholas Bellinger */ 2896c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 2897c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 2898c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 2899c66ac9dbSNicholas Bellinger /* 2900c66ac9dbSNicholas Bellinger * Removing of registrations in non all registrants 2901c66ac9dbSNicholas Bellinger * type reservations without a matching SA reservation 2902c66ac9dbSNicholas Bellinger * key. 2903c66ac9dbSNicholas Bellinger * 2904c66ac9dbSNicholas Bellinger * a) Remove the registrations for all I_T nexuses 2905c66ac9dbSNicholas Bellinger * specified by the SERVICE ACTION RESERVATION KEY 2906c66ac9dbSNicholas Bellinger * field; 2907c66ac9dbSNicholas Bellinger * b) Ignore the contents of the SCOPE and TYPE fields; 2908c66ac9dbSNicholas Bellinger * c) Process tasks as defined in 5.7.1; and 2909c66ac9dbSNicholas Bellinger * d) Establish a unit attention condition for the 2910c66ac9dbSNicholas Bellinger * initiator port associated with every I_T nexus 2911c66ac9dbSNicholas Bellinger * that lost its registration other than the I_T 2912c66ac9dbSNicholas Bellinger * nexus on which the PERSISTENT RESERVE OUT command 2913c66ac9dbSNicholas Bellinger * was received, with the additional sense code set 2914c66ac9dbSNicholas Bellinger * to REGISTRATIONS PREEMPTED. 2915c66ac9dbSNicholas Bellinger */ 29166708bb27SAndy Grover if (!all_reg) { 2917c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_key != sa_res_key) 2918c66ac9dbSNicholas Bellinger continue; 2919b6932ee3SSteven Allen sa_res_key_unmatched = false; 2920c66ac9dbSNicholas Bellinger 2921c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 2922c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 2923c66ac9dbSNicholas Bellinger pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; 2924c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, 292533ce6a87SAndy Grover (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : 2926c66ac9dbSNicholas Bellinger NULL, calling_it_nexus); 2927c66ac9dbSNicholas Bellinger } else { 2928c66ac9dbSNicholas Bellinger /* 2929c66ac9dbSNicholas Bellinger * Case for any existing all registrants type 2930c66ac9dbSNicholas Bellinger * reservation, follow logic in spc4r17 section 2931c66ac9dbSNicholas Bellinger * 5.7.11.4 Preempting, Table 52 and Figure 7. 2932c66ac9dbSNicholas Bellinger * 2933c66ac9dbSNicholas Bellinger * For a ZERO SA Reservation key, release 2934125d0119SHannes Reinecke * all other registrations and do an implicit 2935c66ac9dbSNicholas Bellinger * release of active persistent reservation. 2936c66ac9dbSNicholas Bellinger * 2937c66ac9dbSNicholas Bellinger * For a non-ZERO SA Reservation key, only 2938c66ac9dbSNicholas Bellinger * release the matching reservation key from 2939c66ac9dbSNicholas Bellinger * registrations. 2940c66ac9dbSNicholas Bellinger */ 2941c66ac9dbSNicholas Bellinger if ((sa_res_key) && 2942c66ac9dbSNicholas Bellinger (pr_reg->pr_res_key != sa_res_key)) 2943c66ac9dbSNicholas Bellinger continue; 2944b6932ee3SSteven Allen sa_res_key_unmatched = false; 2945c66ac9dbSNicholas Bellinger 2946c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 2947c66ac9dbSNicholas Bellinger if (calling_it_nexus) 2948c66ac9dbSNicholas Bellinger continue; 2949c66ac9dbSNicholas Bellinger 2950c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 2951c66ac9dbSNicholas Bellinger pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; 2952c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, 295333ce6a87SAndy Grover (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : 2954c66ac9dbSNicholas Bellinger NULL, 0); 2955c66ac9dbSNicholas Bellinger } 29566708bb27SAndy Grover if (!calling_it_nexus) 2957c51c8e7bSHannes Reinecke target_ua_allocate_lun(pr_reg_nacl, 2958c66ac9dbSNicholas Bellinger pr_res_mapped_lun, 0x2A, 29599e08e34eSMarco Sanvido ASCQ_2AH_REGISTRATIONS_PREEMPTED); 2960c66ac9dbSNicholas Bellinger } 2961c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 2962c66ac9dbSNicholas Bellinger /* 2963c66ac9dbSNicholas Bellinger * If a PERSISTENT RESERVE OUT with a PREEMPT service action or 2964c66ac9dbSNicholas Bellinger * a PREEMPT AND ABORT service action sets the SERVICE ACTION 2965c66ac9dbSNicholas Bellinger * RESERVATION KEY field to a value that does not match any 2966c66ac9dbSNicholas Bellinger * registered reservation key, then the device server shall 2967c66ac9dbSNicholas Bellinger * complete the command with RESERVATION CONFLICT status. 2968c66ac9dbSNicholas Bellinger */ 2969b6932ee3SSteven Allen if (sa_res_key_unmatched) { 2970c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2971c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 2972de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 2973c66ac9dbSNicholas Bellinger } 2974c66ac9dbSNicholas Bellinger /* 2975c66ac9dbSNicholas Bellinger * For an existing all registrants type reservation 2976c66ac9dbSNicholas Bellinger * with a zero SA rservation key, preempt the existing 2977c66ac9dbSNicholas Bellinger * reservation with the new PR type and scope. 2978c66ac9dbSNicholas Bellinger */ 2979c66ac9dbSNicholas Bellinger if (pr_res_holder && all_reg && !(sa_res_key)) { 2980c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_preempt(dev, pr_reg_n, 298133ce6a87SAndy Grover (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : NULL, 298233ce6a87SAndy Grover type, scope, preempt_type); 2983c66ac9dbSNicholas Bellinger 298433ce6a87SAndy Grover if (preempt_type == PREEMPT_AND_ABORT) 2985c66ac9dbSNicholas Bellinger core_scsi3_release_preempt_and_abort( 2986c66ac9dbSNicholas Bellinger &preempt_and_abort_list, pr_reg_n); 2987c66ac9dbSNicholas Bellinger } 2988c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2989c66ac9dbSNicholas Bellinger 2990459f213bSAndy Grover if (pr_tmpl->pr_aptpl_active) 2991459f213bSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, true); 2992c66ac9dbSNicholas Bellinger 2993c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 29945951146dSAndy Grover core_scsi3_pr_generation(cmd->se_dev); 2995c66ac9dbSNicholas Bellinger return 0; 2996c66ac9dbSNicholas Bellinger } 2997c66ac9dbSNicholas Bellinger /* 2998c66ac9dbSNicholas Bellinger * The PREEMPTing SA reservation key matches that of the 2999c66ac9dbSNicholas Bellinger * existing persistent reservation, first, we check if 3000c66ac9dbSNicholas Bellinger * we are preempting our own reservation. 3001c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.11.4.3 Preempting 3002c66ac9dbSNicholas Bellinger * persistent reservations and registration handling 3003c66ac9dbSNicholas Bellinger * 3004c66ac9dbSNicholas Bellinger * If an all registrants persistent reservation is not 3005c66ac9dbSNicholas Bellinger * present, it is not an error for the persistent 3006c66ac9dbSNicholas Bellinger * reservation holder to preempt itself (i.e., a 3007c66ac9dbSNicholas Bellinger * PERSISTENT RESERVE OUT with a PREEMPT service action 3008c66ac9dbSNicholas Bellinger * or a PREEMPT AND ABORT service action with the 3009c66ac9dbSNicholas Bellinger * SERVICE ACTION RESERVATION KEY value equal to the 3010c66ac9dbSNicholas Bellinger * persistent reservation holder's reservation key that 3011c66ac9dbSNicholas Bellinger * is received from the persistent reservation holder). 3012c66ac9dbSNicholas Bellinger * In that case, the device server shall establish the 3013c66ac9dbSNicholas Bellinger * new persistent reservation and maintain the 3014c66ac9dbSNicholas Bellinger * registration. 3015c66ac9dbSNicholas Bellinger */ 3016c66ac9dbSNicholas Bellinger prh_type = pr_res_holder->pr_res_type; 3017c66ac9dbSNicholas Bellinger prh_scope = pr_res_holder->pr_res_scope; 3018c66ac9dbSNicholas Bellinger /* 3019c66ac9dbSNicholas Bellinger * If the SERVICE ACTION RESERVATION KEY field identifies a 3020c66ac9dbSNicholas Bellinger * persistent reservation holder (see 5.7.10), the device 3021c66ac9dbSNicholas Bellinger * server shall perform a preempt by doing the following as 3022c66ac9dbSNicholas Bellinger * an uninterrupted series of actions: 3023c66ac9dbSNicholas Bellinger * 3024c66ac9dbSNicholas Bellinger * a) Release the persistent reservation for the holder 3025c66ac9dbSNicholas Bellinger * identified by the SERVICE ACTION RESERVATION KEY field; 3026c66ac9dbSNicholas Bellinger */ 3027c66ac9dbSNicholas Bellinger if (pr_reg_n != pr_res_holder) 3028c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, 3029c66ac9dbSNicholas Bellinger pr_res_holder->pr_reg_nacl, 30306c3c9baaSNicholas Bellinger dev->dev_pr_res_holder, 0, 0); 3031c66ac9dbSNicholas Bellinger /* 3032c66ac9dbSNicholas Bellinger * b) Remove the registrations for all I_T nexuses identified 3033c66ac9dbSNicholas Bellinger * by the SERVICE ACTION RESERVATION KEY field, except the 3034c66ac9dbSNicholas Bellinger * I_T nexus that is being used for the PERSISTENT RESERVE 3035c66ac9dbSNicholas Bellinger * OUT command. If an all registrants persistent reservation 3036c66ac9dbSNicholas Bellinger * is present and the SERVICE ACTION RESERVATION KEY field 3037c66ac9dbSNicholas Bellinger * is set to zero, then all registrations shall be removed 3038c66ac9dbSNicholas Bellinger * except for that of the I_T nexus that is being used for 3039c66ac9dbSNicholas Bellinger * the PERSISTENT RESERVE OUT command; 3040c66ac9dbSNicholas Bellinger */ 3041c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 3042c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 3043c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 3044c66ac9dbSNicholas Bellinger 3045c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 3046c66ac9dbSNicholas Bellinger if (calling_it_nexus) 3047c66ac9dbSNicholas Bellinger continue; 3048c66ac9dbSNicholas Bellinger 3049c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_key != sa_res_key) 3050c66ac9dbSNicholas Bellinger continue; 3051c66ac9dbSNicholas Bellinger 3052c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 3053c66ac9dbSNicholas Bellinger pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; 3054c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, 305533ce6a87SAndy Grover (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : NULL, 3056c66ac9dbSNicholas Bellinger calling_it_nexus); 3057c66ac9dbSNicholas Bellinger /* 3058c66ac9dbSNicholas Bellinger * e) Establish a unit attention condition for the initiator 3059c66ac9dbSNicholas Bellinger * port associated with every I_T nexus that lost its 3060c66ac9dbSNicholas Bellinger * persistent reservation and/or registration, with the 3061c66ac9dbSNicholas Bellinger * additional sense code set to REGISTRATIONS PREEMPTED; 3062c66ac9dbSNicholas Bellinger */ 3063c51c8e7bSHannes Reinecke target_ua_allocate_lun(pr_reg_nacl, pr_res_mapped_lun, 0x2A, 30649e08e34eSMarco Sanvido ASCQ_2AH_REGISTRATIONS_PREEMPTED); 3065c66ac9dbSNicholas Bellinger } 3066c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 3067c66ac9dbSNicholas Bellinger /* 3068c66ac9dbSNicholas Bellinger * c) Establish a persistent reservation for the preempting 3069c66ac9dbSNicholas Bellinger * I_T nexus using the contents of the SCOPE and TYPE fields; 3070c66ac9dbSNicholas Bellinger */ 3071c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_preempt(dev, pr_reg_n, 307233ce6a87SAndy Grover (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : NULL, 307333ce6a87SAndy Grover type, scope, preempt_type); 3074c66ac9dbSNicholas Bellinger /* 3075c66ac9dbSNicholas Bellinger * d) Process tasks as defined in 5.7.1; 3076c66ac9dbSNicholas Bellinger * e) See above.. 3077c66ac9dbSNicholas Bellinger * f) If the type or scope has changed, then for every I_T nexus 3078c66ac9dbSNicholas Bellinger * whose reservation key was not removed, except for the I_T 3079c66ac9dbSNicholas Bellinger * nexus on which the PERSISTENT RESERVE OUT command was 3080c66ac9dbSNicholas Bellinger * received, the device server shall establish a unit 3081c66ac9dbSNicholas Bellinger * attention condition for the initiator port associated with 3082c66ac9dbSNicholas Bellinger * that I_T nexus, with the additional sense code set to 3083c66ac9dbSNicholas Bellinger * RESERVATIONS RELEASED. If the type or scope have not 3084c66ac9dbSNicholas Bellinger * changed, then no unit attention condition(s) shall be 3085c66ac9dbSNicholas Bellinger * established for this reason. 3086c66ac9dbSNicholas Bellinger */ 3087c66ac9dbSNicholas Bellinger if ((prh_type != type) || (prh_scope != scope)) { 3088c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 3089c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 3090c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 3091c66ac9dbSNicholas Bellinger 3092c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 3093c66ac9dbSNicholas Bellinger if (calling_it_nexus) 3094c66ac9dbSNicholas Bellinger continue; 3095c66ac9dbSNicholas Bellinger 3096c51c8e7bSHannes Reinecke target_ua_allocate_lun(pr_reg->pr_reg_nacl, 3097c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun, 0x2A, 3098c66ac9dbSNicholas Bellinger ASCQ_2AH_RESERVATIONS_RELEASED); 3099c66ac9dbSNicholas Bellinger } 3100c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 3101c66ac9dbSNicholas Bellinger } 3102c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3103c66ac9dbSNicholas Bellinger /* 3104c66ac9dbSNicholas Bellinger * Call LUN_RESET logic upon list of struct t10_pr_registration, 3105c66ac9dbSNicholas Bellinger * All received CDBs for the matching existing reservation and 3106c66ac9dbSNicholas Bellinger * registrations undergo ABORT_TASK logic. 3107c66ac9dbSNicholas Bellinger * 3108c66ac9dbSNicholas Bellinger * From there, core_scsi3_release_preempt_and_abort() will 3109c66ac9dbSNicholas Bellinger * release every registration in the list (which have already 3110c66ac9dbSNicholas Bellinger * been removed from the primary pr_reg list), except the 3111c66ac9dbSNicholas Bellinger * new persistent reservation holder, the calling Initiator Port. 3112c66ac9dbSNicholas Bellinger */ 311333ce6a87SAndy Grover if (preempt_type == PREEMPT_AND_ABORT) { 3114c66ac9dbSNicholas Bellinger core_tmr_lun_reset(dev, NULL, &preempt_and_abort_list, cmd); 3115c66ac9dbSNicholas Bellinger core_scsi3_release_preempt_and_abort(&preempt_and_abort_list, 3116c66ac9dbSNicholas Bellinger pr_reg_n); 3117c66ac9dbSNicholas Bellinger } 3118c66ac9dbSNicholas Bellinger 3119459f213bSAndy Grover if (pr_tmpl->pr_aptpl_active) 3120459f213bSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, true); 3121c66ac9dbSNicholas Bellinger 3122c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 31235951146dSAndy Grover core_scsi3_pr_generation(cmd->se_dev); 3124c66ac9dbSNicholas Bellinger return 0; 3125c66ac9dbSNicholas Bellinger } 3126c66ac9dbSNicholas Bellinger 3127de103c93SChristoph Hellwig static sense_reason_t 3128de103c93SChristoph Hellwig core_scsi3_emulate_pro_preempt(struct se_cmd *cmd, int type, int scope, 312933ce6a87SAndy Grover u64 res_key, u64 sa_res_key, enum preempt_type preempt_type) 3130c66ac9dbSNicholas Bellinger { 3131c66ac9dbSNicholas Bellinger switch (type) { 3132c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE: 3133c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS: 3134c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: 3135c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: 3136c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: 3137c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: 3138de103c93SChristoph Hellwig return core_scsi3_pro_preempt(cmd, type, scope, res_key, 313933ce6a87SAndy Grover sa_res_key, preempt_type); 3140c66ac9dbSNicholas Bellinger default: 31416708bb27SAndy Grover pr_err("SPC-3 PR: Unknown Service Action PREEMPT%s" 314233ce6a87SAndy Grover " Type: 0x%02x\n", (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : "", type); 3143de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 3144c66ac9dbSNicholas Bellinger } 3145c66ac9dbSNicholas Bellinger } 3146c66ac9dbSNicholas Bellinger 3147c66ac9dbSNicholas Bellinger 3148de103c93SChristoph Hellwig static sense_reason_t 3149de103c93SChristoph Hellwig core_scsi3_emulate_pro_register_and_move(struct se_cmd *cmd, u64 res_key, 3150de103c93SChristoph Hellwig u64 sa_res_key, int aptpl, int unreg) 3151c66ac9dbSNicholas Bellinger { 3152e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 31535951146dSAndy Grover struct se_device *dev = cmd->se_dev; 315428168905SJörn Engel struct se_dev_entry *dest_se_deve = NULL; 3155adf653f9SChristoph Hellwig struct se_lun *se_lun = cmd->se_lun, *tmp_lun; 3156c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl, *pr_reg_nacl, *dest_node_acl = NULL; 3157c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg, *dest_se_tpg = NULL; 31589ac8928eSChristoph Hellwig const struct target_core_fabric_ops *dest_tf_ops = NULL, *tf_ops; 3159c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_res_holder, *dest_pr_reg; 31600fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 316105d1c7c0SAndy Grover unsigned char *buf; 31622650d71eSChristoph Hellwig const unsigned char *initiator_str; 316313ba564cSJulia Lawall char *iport_ptr = NULL, i_buf[PR_REG_ISID_ID_LEN]; 3164c66ac9dbSNicholas Bellinger u32 tid_len, tmp_tid_len; 3165d2843c17SAndy Grover int new_reg = 0, type, scope, matching_iname; 3166de103c93SChristoph Hellwig sense_reason_t ret; 3167c66ac9dbSNicholas Bellinger unsigned short rtpi; 3168c66ac9dbSNicholas Bellinger unsigned char proto_ident; 3169c66ac9dbSNicholas Bellinger 31706708bb27SAndy Grover if (!se_sess || !se_lun) { 31716708bb27SAndy Grover pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); 3172de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3173c66ac9dbSNicholas Bellinger } 3174de103c93SChristoph Hellwig 3175c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 3176c66ac9dbSNicholas Bellinger se_tpg = se_sess->se_tpg; 3177e3d6f909SAndy Grover tf_ops = se_tpg->se_tpg_tfo; 3178c66ac9dbSNicholas Bellinger /* 3179c66ac9dbSNicholas Bellinger * Follow logic from spc4r17 Section 5.7.8, Table 50 -- 3180c66ac9dbSNicholas Bellinger * Register behaviors for a REGISTER AND MOVE service action 3181c66ac9dbSNicholas Bellinger * 3182c66ac9dbSNicholas Bellinger * Locate the existing *pr_reg via struct se_node_acl pointers 3183c66ac9dbSNicholas Bellinger */ 31845951146dSAndy Grover pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, 3185c66ac9dbSNicholas Bellinger se_sess); 31866708bb27SAndy Grover if (!pr_reg) { 31876708bb27SAndy Grover pr_err("SPC-3 PR: Unable to locate PR_REGISTERED" 3188c66ac9dbSNicholas Bellinger " *pr_reg for REGISTER_AND_MOVE\n"); 3189de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3190c66ac9dbSNicholas Bellinger } 3191c66ac9dbSNicholas Bellinger /* 3192c66ac9dbSNicholas Bellinger * The provided reservation key much match the existing reservation key 3193c66ac9dbSNicholas Bellinger * provided during this initiator's I_T nexus registration. 3194c66ac9dbSNicholas Bellinger */ 3195c66ac9dbSNicholas Bellinger if (res_key != pr_reg->pr_res_key) { 31966708bb27SAndy Grover pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received" 3197c66ac9dbSNicholas Bellinger " res_key: 0x%016Lx does not match existing SA REGISTER" 3198c66ac9dbSNicholas Bellinger " res_key: 0x%016Lx\n", res_key, pr_reg->pr_res_key); 3199de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 3200de103c93SChristoph Hellwig goto out_put_pr_reg; 3201c66ac9dbSNicholas Bellinger } 3202c66ac9dbSNicholas Bellinger /* 3203c66ac9dbSNicholas Bellinger * The service active reservation key needs to be non zero 3204c66ac9dbSNicholas Bellinger */ 32056708bb27SAndy Grover if (!sa_res_key) { 32066708bb27SAndy Grover pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received zero" 3207c66ac9dbSNicholas Bellinger " sa_res_key\n"); 3208de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3209de103c93SChristoph Hellwig goto out_put_pr_reg; 3210c66ac9dbSNicholas Bellinger } 321105d1c7c0SAndy Grover 3212c66ac9dbSNicholas Bellinger /* 3213c66ac9dbSNicholas Bellinger * Determine the Relative Target Port Identifier where the reservation 3214c66ac9dbSNicholas Bellinger * will be moved to for the TransportID containing SCSI initiator WWN 3215c66ac9dbSNicholas Bellinger * information. 3216c66ac9dbSNicholas Bellinger */ 32174949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3218de103c93SChristoph Hellwig if (!buf) { 3219de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3220de103c93SChristoph Hellwig goto out_put_pr_reg; 3221de103c93SChristoph Hellwig } 3222de103c93SChristoph Hellwig 3223c66ac9dbSNicholas Bellinger rtpi = (buf[18] & 0xff) << 8; 3224c66ac9dbSNicholas Bellinger rtpi |= buf[19] & 0xff; 3225c66ac9dbSNicholas Bellinger tid_len = (buf[20] & 0xff) << 24; 3226c66ac9dbSNicholas Bellinger tid_len |= (buf[21] & 0xff) << 16; 3227c66ac9dbSNicholas Bellinger tid_len |= (buf[22] & 0xff) << 8; 3228c66ac9dbSNicholas Bellinger tid_len |= buf[23] & 0xff; 32294949314cSAndy Grover transport_kunmap_data_sg(cmd); 323005d1c7c0SAndy Grover buf = NULL; 3231c66ac9dbSNicholas Bellinger 3232c66ac9dbSNicholas Bellinger if ((tid_len + 24) != cmd->data_length) { 32336708bb27SAndy Grover pr_err("SPC-3 PR: Illegal tid_len: %u + 24 byte header" 3234c66ac9dbSNicholas Bellinger " does not equal CDB data_length: %u\n", tid_len, 3235c66ac9dbSNicholas Bellinger cmd->data_length); 3236de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3237de103c93SChristoph Hellwig goto out_put_pr_reg; 3238c66ac9dbSNicholas Bellinger } 3239c66ac9dbSNicholas Bellinger 3240c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 3241adf653f9SChristoph Hellwig list_for_each_entry(tmp_lun, &dev->dev_sep_list, lun_dev_link) { 3242adf653f9SChristoph Hellwig if (tmp_lun->lun_rtpi != rtpi) 3243c66ac9dbSNicholas Bellinger continue; 3244adf653f9SChristoph Hellwig dest_se_tpg = tmp_lun->lun_tpg; 3245e3d6f909SAndy Grover dest_tf_ops = dest_se_tpg->se_tpg_tfo; 32466708bb27SAndy Grover if (!dest_tf_ops) 3247c66ac9dbSNicholas Bellinger continue; 3248c66ac9dbSNicholas Bellinger 324933940d09SJoern Engel atomic_inc_mb(&dest_se_tpg->tpg_pr_ref_count); 3250c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 3251c66ac9dbSNicholas Bellinger 3252de103c93SChristoph Hellwig if (core_scsi3_tpg_depend_item(dest_se_tpg)) { 32536708bb27SAndy Grover pr_err("core_scsi3_tpg_depend_item() failed" 3254c66ac9dbSNicholas Bellinger " for dest_se_tpg\n"); 325533940d09SJoern Engel atomic_dec_mb(&dest_se_tpg->tpg_pr_ref_count); 3256de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3257de103c93SChristoph Hellwig goto out_put_pr_reg; 3258c66ac9dbSNicholas Bellinger } 3259c66ac9dbSNicholas Bellinger 3260c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 3261c66ac9dbSNicholas Bellinger break; 3262c66ac9dbSNicholas Bellinger } 3263c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 3264c66ac9dbSNicholas Bellinger 32656708bb27SAndy Grover if (!dest_se_tpg || !dest_tf_ops) { 32666708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate" 3267c66ac9dbSNicholas Bellinger " fabric ops from Relative Target Port Identifier:" 3268c66ac9dbSNicholas Bellinger " %hu\n", rtpi); 3269de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3270de103c93SChristoph Hellwig goto out_put_pr_reg; 3271c66ac9dbSNicholas Bellinger } 327205d1c7c0SAndy Grover 32734949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3274de103c93SChristoph Hellwig if (!buf) { 3275de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3276de103c93SChristoph Hellwig goto out_put_pr_reg; 3277de103c93SChristoph Hellwig } 3278c66ac9dbSNicholas Bellinger proto_ident = (buf[24] & 0x0f); 32798b1e1244SAndy Grover 32806708bb27SAndy Grover pr_debug("SPC-3 PR REGISTER_AND_MOVE: Extracted Protocol Identifier:" 3281c66ac9dbSNicholas Bellinger " 0x%02x\n", proto_ident); 32828b1e1244SAndy Grover 32832aeeafaeSChristoph Hellwig if (proto_ident != dest_se_tpg->proto_id) { 32846708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: Received" 3285c66ac9dbSNicholas Bellinger " proto_ident: 0x%02x does not match ident: 0x%02x" 3286c66ac9dbSNicholas Bellinger " from fabric: %s\n", proto_ident, 32872aeeafaeSChristoph Hellwig dest_se_tpg->proto_id, 3288c66ac9dbSNicholas Bellinger dest_tf_ops->get_fabric_name()); 3289de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3290c66ac9dbSNicholas Bellinger goto out; 3291c66ac9dbSNicholas Bellinger } 32922650d71eSChristoph Hellwig initiator_str = target_parse_pr_out_transport_id(dest_se_tpg, 3293c66ac9dbSNicholas Bellinger (const char *)&buf[24], &tmp_tid_len, &iport_ptr); 32946708bb27SAndy Grover if (!initiator_str) { 32956708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate" 3296c66ac9dbSNicholas Bellinger " initiator_str from Transport ID\n"); 3297de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3298c66ac9dbSNicholas Bellinger goto out; 3299c66ac9dbSNicholas Bellinger } 3300c66ac9dbSNicholas Bellinger 33014949314cSAndy Grover transport_kunmap_data_sg(cmd); 330205d1c7c0SAndy Grover buf = NULL; 330305d1c7c0SAndy Grover 33046708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Extracted initiator %s identifier: %s" 3305c66ac9dbSNicholas Bellinger " %s\n", dest_tf_ops->get_fabric_name(), (iport_ptr != NULL) ? 3306c66ac9dbSNicholas Bellinger "port" : "device", initiator_str, (iport_ptr != NULL) ? 3307c66ac9dbSNicholas Bellinger iport_ptr : ""); 3308c66ac9dbSNicholas Bellinger /* 3309c66ac9dbSNicholas Bellinger * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service 3310c66ac9dbSNicholas Bellinger * action specifies a TransportID that is the same as the initiator port 3311c66ac9dbSNicholas Bellinger * of the I_T nexus for the command received, then the command shall 3312c66ac9dbSNicholas Bellinger * be terminated with CHECK CONDITION status, with the sense key set to 3313c66ac9dbSNicholas Bellinger * ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD 3314c66ac9dbSNicholas Bellinger * IN PARAMETER LIST. 3315c66ac9dbSNicholas Bellinger */ 3316c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 3317c66ac9dbSNicholas Bellinger matching_iname = (!strcmp(initiator_str, 3318c66ac9dbSNicholas Bellinger pr_reg_nacl->initiatorname)) ? 1 : 0; 33196708bb27SAndy Grover if (!matching_iname) 3320c66ac9dbSNicholas Bellinger goto after_iport_check; 3321c66ac9dbSNicholas Bellinger 33226708bb27SAndy Grover if (!iport_ptr || !pr_reg->isid_present_at_reg) { 33236708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s" 3324c66ac9dbSNicholas Bellinger " matches: %s on received I_T Nexus\n", initiator_str, 3325c66ac9dbSNicholas Bellinger pr_reg_nacl->initiatorname); 3326de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3327c66ac9dbSNicholas Bellinger goto out; 3328c66ac9dbSNicholas Bellinger } 33296708bb27SAndy Grover if (!strcmp(iport_ptr, pr_reg->pr_reg_isid)) { 33306708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s %s" 3331c66ac9dbSNicholas Bellinger " matches: %s %s on received I_T Nexus\n", 3332c66ac9dbSNicholas Bellinger initiator_str, iport_ptr, pr_reg_nacl->initiatorname, 3333c66ac9dbSNicholas Bellinger pr_reg->pr_reg_isid); 3334de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3335c66ac9dbSNicholas Bellinger goto out; 3336c66ac9dbSNicholas Bellinger } 3337c66ac9dbSNicholas Bellinger after_iport_check: 3338c66ac9dbSNicholas Bellinger /* 3339c66ac9dbSNicholas Bellinger * Locate the destination struct se_node_acl from the received Transport ID 3340c66ac9dbSNicholas Bellinger */ 3341403edd78SNicholas Bellinger mutex_lock(&dest_se_tpg->acl_node_mutex); 3342c66ac9dbSNicholas Bellinger dest_node_acl = __core_tpg_get_initiator_node_acl(dest_se_tpg, 3343c66ac9dbSNicholas Bellinger initiator_str); 334433940d09SJoern Engel if (dest_node_acl) 334533940d09SJoern Engel atomic_inc_mb(&dest_node_acl->acl_pr_ref_count); 3346403edd78SNicholas Bellinger mutex_unlock(&dest_se_tpg->acl_node_mutex); 3347c66ac9dbSNicholas Bellinger 33486708bb27SAndy Grover if (!dest_node_acl) { 33496708bb27SAndy Grover pr_err("Unable to locate %s dest_node_acl for" 3350c66ac9dbSNicholas Bellinger " TransportID%s\n", dest_tf_ops->get_fabric_name(), 3351c66ac9dbSNicholas Bellinger initiator_str); 3352de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3353c66ac9dbSNicholas Bellinger goto out; 3354c66ac9dbSNicholas Bellinger } 3355de103c93SChristoph Hellwig 3356de103c93SChristoph Hellwig if (core_scsi3_nodeacl_depend_item(dest_node_acl)) { 33576708bb27SAndy Grover pr_err("core_scsi3_nodeacl_depend_item() for" 3358c66ac9dbSNicholas Bellinger " dest_node_acl\n"); 335933940d09SJoern Engel atomic_dec_mb(&dest_node_acl->acl_pr_ref_count); 3360c66ac9dbSNicholas Bellinger dest_node_acl = NULL; 3361de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3362c66ac9dbSNicholas Bellinger goto out; 3363c66ac9dbSNicholas Bellinger } 33648b1e1244SAndy Grover 33656708bb27SAndy Grover pr_debug("SPC-3 PR REGISTER_AND_MOVE: Found %s dest_node_acl:" 3366c66ac9dbSNicholas Bellinger " %s from TransportID\n", dest_tf_ops->get_fabric_name(), 3367c66ac9dbSNicholas Bellinger dest_node_acl->initiatorname); 33688b1e1244SAndy Grover 3369c66ac9dbSNicholas Bellinger /* 3370c66ac9dbSNicholas Bellinger * Locate the struct se_dev_entry pointer for the matching RELATIVE TARGET 3371c66ac9dbSNicholas Bellinger * PORT IDENTIFIER. 3372c66ac9dbSNicholas Bellinger */ 3373c66ac9dbSNicholas Bellinger dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, rtpi); 33746708bb27SAndy Grover if (!dest_se_deve) { 33756708bb27SAndy Grover pr_err("Unable to locate %s dest_se_deve from RTPI:" 3376c66ac9dbSNicholas Bellinger " %hu\n", dest_tf_ops->get_fabric_name(), rtpi); 3377de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3378c66ac9dbSNicholas Bellinger goto out; 3379c66ac9dbSNicholas Bellinger } 3380c66ac9dbSNicholas Bellinger 3381de103c93SChristoph Hellwig if (core_scsi3_lunacl_depend_item(dest_se_deve)) { 33826708bb27SAndy Grover pr_err("core_scsi3_lunacl_depend_item() failed\n"); 338329a05deeSNicholas Bellinger kref_put(&dest_se_deve->pr_kref, target_pr_kref_release); 3384c66ac9dbSNicholas Bellinger dest_se_deve = NULL; 3385de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3386c66ac9dbSNicholas Bellinger goto out; 3387c66ac9dbSNicholas Bellinger } 33888b1e1244SAndy Grover 33896708bb27SAndy Grover pr_debug("SPC-3 PR REGISTER_AND_MOVE: Located %s node %s LUN" 3390f2d30680SHannes Reinecke " ACL for dest_se_deve->mapped_lun: %llu\n", 3391c66ac9dbSNicholas Bellinger dest_tf_ops->get_fabric_name(), dest_node_acl->initiatorname, 3392c66ac9dbSNicholas Bellinger dest_se_deve->mapped_lun); 33938b1e1244SAndy Grover 3394c66ac9dbSNicholas Bellinger /* 3395c66ac9dbSNicholas Bellinger * A persistent reservation needs to already existing in order to 3396c66ac9dbSNicholas Bellinger * successfully complete the REGISTER_AND_MOVE service action.. 3397c66ac9dbSNicholas Bellinger */ 3398c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 3399c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 34006708bb27SAndy Grover if (!pr_res_holder) { 34016708bb27SAndy Grover pr_warn("SPC-3 PR REGISTER_AND_MOVE: No reservation" 3402c66ac9dbSNicholas Bellinger " currently held\n"); 3403c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3404de103c93SChristoph Hellwig ret = TCM_INVALID_CDB_FIELD; 3405c66ac9dbSNicholas Bellinger goto out; 3406c66ac9dbSNicholas Bellinger } 3407c66ac9dbSNicholas Bellinger /* 3408c66ac9dbSNicholas Bellinger * The received on I_T Nexus must be the reservation holder. 3409c66ac9dbSNicholas Bellinger * 3410c66ac9dbSNicholas Bellinger * From spc4r17 section 5.7.8 Table 50 -- 3411c66ac9dbSNicholas Bellinger * Register behaviors for a REGISTER AND MOVE service action 3412c66ac9dbSNicholas Bellinger */ 3413e673dc92SIlias Tsitsimpis if (!is_reservation_holder(pr_res_holder, pr_reg)) { 34146708bb27SAndy Grover pr_warn("SPC-3 PR REGISTER_AND_MOVE: Calling I_T" 3415c66ac9dbSNicholas Bellinger " Nexus is not reservation holder\n"); 3416c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3417de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 3418c66ac9dbSNicholas Bellinger goto out; 3419c66ac9dbSNicholas Bellinger } 3420c66ac9dbSNicholas Bellinger /* 3421c66ac9dbSNicholas Bellinger * From spc4r17 section 5.7.8: registering and moving reservation 3422c66ac9dbSNicholas Bellinger * 3423c66ac9dbSNicholas Bellinger * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service 3424c66ac9dbSNicholas Bellinger * action is received and the established persistent reservation is a 3425c66ac9dbSNicholas Bellinger * Write Exclusive - All Registrants type or Exclusive Access - 3426c66ac9dbSNicholas Bellinger * All Registrants type reservation, then the command shall be completed 3427c66ac9dbSNicholas Bellinger * with RESERVATION CONFLICT status. 3428c66ac9dbSNicholas Bellinger */ 3429c66ac9dbSNicholas Bellinger if ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 3430c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { 34316708bb27SAndy Grover pr_warn("SPC-3 PR REGISTER_AND_MOVE: Unable to move" 3432c66ac9dbSNicholas Bellinger " reservation for type: %s\n", 3433c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_res_holder->pr_res_type)); 3434c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3435de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 3436c66ac9dbSNicholas Bellinger goto out; 3437c66ac9dbSNicholas Bellinger } 3438c66ac9dbSNicholas Bellinger pr_res_nacl = pr_res_holder->pr_reg_nacl; 3439c66ac9dbSNicholas Bellinger /* 3440c66ac9dbSNicholas Bellinger * b) Ignore the contents of the (received) SCOPE and TYPE fields; 3441c66ac9dbSNicholas Bellinger */ 3442c66ac9dbSNicholas Bellinger type = pr_res_holder->pr_res_type; 3443c66ac9dbSNicholas Bellinger scope = pr_res_holder->pr_res_type; 3444c66ac9dbSNicholas Bellinger /* 3445c66ac9dbSNicholas Bellinger * c) Associate the reservation key specified in the SERVICE ACTION 3446c66ac9dbSNicholas Bellinger * RESERVATION KEY field with the I_T nexus specified as the 3447c66ac9dbSNicholas Bellinger * destination of the register and move, where: 3448c66ac9dbSNicholas Bellinger * A) The I_T nexus is specified by the TransportID and the 3449c66ac9dbSNicholas Bellinger * RELATIVE TARGET PORT IDENTIFIER field (see 6.14.4); and 3450c66ac9dbSNicholas Bellinger * B) Regardless of the TransportID format used, the association for 3451c66ac9dbSNicholas Bellinger * the initiator port is based on either the initiator port name 3452c66ac9dbSNicholas Bellinger * (see 3.1.71) on SCSI transport protocols where port names are 3453c66ac9dbSNicholas Bellinger * required or the initiator port identifier (see 3.1.70) on SCSI 3454c66ac9dbSNicholas Bellinger * transport protocols where port names are not required; 3455c66ac9dbSNicholas Bellinger * d) Register the reservation key specified in the SERVICE ACTION 3456c66ac9dbSNicholas Bellinger * RESERVATION KEY field; 3457c66ac9dbSNicholas Bellinger * e) Retain the reservation key specified in the SERVICE ACTION 3458c66ac9dbSNicholas Bellinger * RESERVATION KEY field and associated information; 3459c66ac9dbSNicholas Bellinger * 3460c66ac9dbSNicholas Bellinger * Also, It is not an error for a REGISTER AND MOVE service action to 3461c66ac9dbSNicholas Bellinger * register an I_T nexus that is already registered with the same 3462c66ac9dbSNicholas Bellinger * reservation key or a different reservation key. 3463c66ac9dbSNicholas Bellinger */ 3464c66ac9dbSNicholas Bellinger dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl, 3465c66ac9dbSNicholas Bellinger iport_ptr); 34666708bb27SAndy Grover if (!dest_pr_reg) { 346779dc9c9eSNicholas Bellinger struct se_lun *dest_lun = rcu_dereference_check(dest_se_deve->se_lun, 346879dc9c9eSNicholas Bellinger atomic_read(&dest_se_deve->pr_kref.refcount) != 0); 346979dc9c9eSNicholas Bellinger 3470c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 347179dc9c9eSNicholas Bellinger if (core_scsi3_alloc_registration(cmd->se_dev, dest_node_acl, 347279dc9c9eSNicholas Bellinger dest_lun, dest_se_deve, dest_se_deve->mapped_lun, 347379dc9c9eSNicholas Bellinger iport_ptr, sa_res_key, 0, aptpl, 2, 1)) { 3474de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3475c66ac9dbSNicholas Bellinger goto out; 3476c66ac9dbSNicholas Bellinger } 347780bfdfa9SNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 3478c66ac9dbSNicholas Bellinger dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl, 3479c66ac9dbSNicholas Bellinger iport_ptr); 3480c66ac9dbSNicholas Bellinger new_reg = 1; 3481c66ac9dbSNicholas Bellinger } 3482c66ac9dbSNicholas Bellinger /* 3483c66ac9dbSNicholas Bellinger * f) Release the persistent reservation for the persistent reservation 3484c66ac9dbSNicholas Bellinger * holder (i.e., the I_T nexus on which the 3485c66ac9dbSNicholas Bellinger */ 3486c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, pr_res_nacl, 34876c3c9baaSNicholas Bellinger dev->dev_pr_res_holder, 0, 0); 3488c66ac9dbSNicholas Bellinger /* 3489c66ac9dbSNicholas Bellinger * g) Move the persistent reservation to the specified I_T nexus using 3490c66ac9dbSNicholas Bellinger * the same scope and type as the persistent reservation released in 3491c66ac9dbSNicholas Bellinger * item f); and 3492c66ac9dbSNicholas Bellinger */ 3493c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = dest_pr_reg; 3494c66ac9dbSNicholas Bellinger dest_pr_reg->pr_res_holder = 1; 3495c66ac9dbSNicholas Bellinger dest_pr_reg->pr_res_type = type; 3496c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope = scope; 3497d2843c17SAndy Grover core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 3498c66ac9dbSNicholas Bellinger /* 3499c66ac9dbSNicholas Bellinger * Increment PRGeneration for existing registrations.. 3500c66ac9dbSNicholas Bellinger */ 35016708bb27SAndy Grover if (!new_reg) 3502c66ac9dbSNicholas Bellinger dest_pr_reg->pr_res_generation = pr_tmpl->pr_generation++; 3503c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3504c66ac9dbSNicholas Bellinger 35056708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: REGISTER_AND_MOVE" 3506c66ac9dbSNicholas Bellinger " created new reservation holder TYPE: %s on object RTPI:" 3507c66ac9dbSNicholas Bellinger " %hu PRGeneration: 0x%08x\n", dest_tf_ops->get_fabric_name(), 3508c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(type), rtpi, 3509c66ac9dbSNicholas Bellinger dest_pr_reg->pr_res_generation); 35106708bb27SAndy Grover pr_debug("SPC-3 PR Successfully moved reservation from" 3511c66ac9dbSNicholas Bellinger " %s Fabric Node: %s%s -> %s Fabric Node: %s %s\n", 3512c66ac9dbSNicholas Bellinger tf_ops->get_fabric_name(), pr_reg_nacl->initiatorname, 3513d2843c17SAndy Grover i_buf, dest_tf_ops->get_fabric_name(), 3514c66ac9dbSNicholas Bellinger dest_node_acl->initiatorname, (iport_ptr != NULL) ? 3515c66ac9dbSNicholas Bellinger iport_ptr : ""); 3516c66ac9dbSNicholas Bellinger /* 3517c66ac9dbSNicholas Bellinger * It is now safe to release configfs group dependencies for destination 3518c66ac9dbSNicholas Bellinger * of Transport ID Initiator Device/Port Identifier 3519c66ac9dbSNicholas Bellinger */ 3520c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 3521c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 3522c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_se_tpg); 3523c66ac9dbSNicholas Bellinger /* 3524c66ac9dbSNicholas Bellinger * h) If the UNREG bit is set to one, unregister (see 5.7.11.3) the I_T 3525c66ac9dbSNicholas Bellinger * nexus on which PERSISTENT RESERVE OUT command was received. 3526c66ac9dbSNicholas Bellinger */ 3527c66ac9dbSNicholas Bellinger if (unreg) { 3528c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 3529c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, NULL, 1); 3530c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 3531c66ac9dbSNicholas Bellinger } else 3532c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 3533c66ac9dbSNicholas Bellinger 3534459f213bSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, aptpl); 3535c66ac9dbSNicholas Bellinger 35364949314cSAndy Grover transport_kunmap_data_sg(cmd); 353705d1c7c0SAndy Grover 3538c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(dest_pr_reg); 3539c66ac9dbSNicholas Bellinger return 0; 3540c66ac9dbSNicholas Bellinger out: 354105d1c7c0SAndy Grover if (buf) 35424949314cSAndy Grover transport_kunmap_data_sg(cmd); 3543c66ac9dbSNicholas Bellinger if (dest_se_deve) 3544c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 3545c66ac9dbSNicholas Bellinger if (dest_node_acl) 3546c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 3547c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_se_tpg); 3548de103c93SChristoph Hellwig 3549de103c93SChristoph Hellwig out_put_pr_reg: 3550c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 3551c66ac9dbSNicholas Bellinger return ret; 3552c66ac9dbSNicholas Bellinger } 3553c66ac9dbSNicholas Bellinger 3554c66ac9dbSNicholas Bellinger static unsigned long long core_scsi3_extract_reservation_key(unsigned char *cdb) 3555c66ac9dbSNicholas Bellinger { 3556c66ac9dbSNicholas Bellinger unsigned int __v1, __v2; 3557c66ac9dbSNicholas Bellinger 3558c66ac9dbSNicholas Bellinger __v1 = (cdb[0] << 24) | (cdb[1] << 16) | (cdb[2] << 8) | cdb[3]; 3559c66ac9dbSNicholas Bellinger __v2 = (cdb[4] << 24) | (cdb[5] << 16) | (cdb[6] << 8) | cdb[7]; 3560c66ac9dbSNicholas Bellinger 3561c66ac9dbSNicholas Bellinger return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; 3562c66ac9dbSNicholas Bellinger } 3563c66ac9dbSNicholas Bellinger 3564c66ac9dbSNicholas Bellinger /* 3565c66ac9dbSNicholas Bellinger * See spc4r17 section 6.14 Table 170 3566c66ac9dbSNicholas Bellinger */ 3567de103c93SChristoph Hellwig sense_reason_t 3568de103c93SChristoph Hellwig target_scsi3_emulate_pr_out(struct se_cmd *cmd) 3569c66ac9dbSNicholas Bellinger { 357092404e60SNicholas Bellinger struct se_device *dev = cmd->se_dev; 3571617c0e06SChristoph Hellwig unsigned char *cdb = &cmd->t_task_cdb[0]; 357205d1c7c0SAndy Grover unsigned char *buf; 3573c66ac9dbSNicholas Bellinger u64 res_key, sa_res_key; 3574c66ac9dbSNicholas Bellinger int sa, scope, type, aptpl; 3575c66ac9dbSNicholas Bellinger int spec_i_pt = 0, all_tg_pt = 0, unreg = 0; 3576de103c93SChristoph Hellwig sense_reason_t ret; 3577617c0e06SChristoph Hellwig 3578617c0e06SChristoph Hellwig /* 3579617c0e06SChristoph Hellwig * Following spc2r20 5.5.1 Reservations overview: 3580617c0e06SChristoph Hellwig * 3581617c0e06SChristoph Hellwig * If a logical unit has been reserved by any RESERVE command and is 3582617c0e06SChristoph Hellwig * still reserved by any initiator, all PERSISTENT RESERVE IN and all 3583617c0e06SChristoph Hellwig * PERSISTENT RESERVE OUT commands shall conflict regardless of 3584617c0e06SChristoph Hellwig * initiator or service action and shall terminate with a RESERVATION 3585617c0e06SChristoph Hellwig * CONFLICT status. 3586617c0e06SChristoph Hellwig */ 35870fd97ccfSChristoph Hellwig if (cmd->se_dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) { 3588617c0e06SChristoph Hellwig pr_err("Received PERSISTENT_RESERVE CDB while legacy" 3589617c0e06SChristoph Hellwig " SPC-2 reservation is held, returning" 3590617c0e06SChristoph Hellwig " RESERVATION_CONFLICT\n"); 3591de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 3592617c0e06SChristoph Hellwig } 3593617c0e06SChristoph Hellwig 3594c66ac9dbSNicholas Bellinger /* 3595c66ac9dbSNicholas Bellinger * FIXME: A NULL struct se_session pointer means an this is not coming from 3596c66ac9dbSNicholas Bellinger * a $FABRIC_MOD's nexus, but from internal passthrough ops. 3597c66ac9dbSNicholas Bellinger */ 3598de103c93SChristoph Hellwig if (!cmd->se_sess) 3599de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3600c66ac9dbSNicholas Bellinger 3601c66ac9dbSNicholas Bellinger if (cmd->data_length < 24) { 36026708bb27SAndy Grover pr_warn("SPC-PR: Received PR OUT parameter list" 3603c66ac9dbSNicholas Bellinger " length too small: %u\n", cmd->data_length); 3604de103c93SChristoph Hellwig return TCM_INVALID_PARAMETER_LIST; 3605c66ac9dbSNicholas Bellinger } 3606de103c93SChristoph Hellwig 3607c66ac9dbSNicholas Bellinger /* 3608c66ac9dbSNicholas Bellinger * From the PERSISTENT_RESERVE_OUT command descriptor block (CDB) 3609c66ac9dbSNicholas Bellinger */ 3610c66ac9dbSNicholas Bellinger sa = (cdb[1] & 0x1f); 3611c66ac9dbSNicholas Bellinger scope = (cdb[2] & 0xf0); 3612c66ac9dbSNicholas Bellinger type = (cdb[2] & 0x0f); 361305d1c7c0SAndy Grover 36144949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3615de103c93SChristoph Hellwig if (!buf) 3616de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3617de103c93SChristoph Hellwig 3618c66ac9dbSNicholas Bellinger /* 3619c66ac9dbSNicholas Bellinger * From PERSISTENT_RESERVE_OUT parameter list (payload) 3620c66ac9dbSNicholas Bellinger */ 3621c66ac9dbSNicholas Bellinger res_key = core_scsi3_extract_reservation_key(&buf[0]); 3622c66ac9dbSNicholas Bellinger sa_res_key = core_scsi3_extract_reservation_key(&buf[8]); 3623c66ac9dbSNicholas Bellinger /* 3624c66ac9dbSNicholas Bellinger * REGISTER_AND_MOVE uses a different SA parameter list containing 3625c66ac9dbSNicholas Bellinger * SCSI TransportIDs. 3626c66ac9dbSNicholas Bellinger */ 3627c66ac9dbSNicholas Bellinger if (sa != PRO_REGISTER_AND_MOVE) { 3628c66ac9dbSNicholas Bellinger spec_i_pt = (buf[20] & 0x08); 3629c66ac9dbSNicholas Bellinger all_tg_pt = (buf[20] & 0x04); 3630c66ac9dbSNicholas Bellinger aptpl = (buf[20] & 0x01); 3631c66ac9dbSNicholas Bellinger } else { 3632c66ac9dbSNicholas Bellinger aptpl = (buf[17] & 0x01); 3633c66ac9dbSNicholas Bellinger unreg = (buf[17] & 0x02); 3634c66ac9dbSNicholas Bellinger } 363592404e60SNicholas Bellinger /* 363692404e60SNicholas Bellinger * If the backend device has been configured to force APTPL metadata 363792404e60SNicholas Bellinger * write-out, go ahead and propigate aptpl=1 down now. 363892404e60SNicholas Bellinger */ 363992404e60SNicholas Bellinger if (dev->dev_attrib.force_pr_aptpl) 364092404e60SNicholas Bellinger aptpl = 1; 364192404e60SNicholas Bellinger 36424949314cSAndy Grover transport_kunmap_data_sg(cmd); 364305d1c7c0SAndy Grover buf = NULL; 364405d1c7c0SAndy Grover 3645c66ac9dbSNicholas Bellinger /* 3646c66ac9dbSNicholas Bellinger * SPEC_I_PT=1 is only valid for Service action: REGISTER 3647c66ac9dbSNicholas Bellinger */ 3648de103c93SChristoph Hellwig if (spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER)) 3649de103c93SChristoph Hellwig return TCM_INVALID_PARAMETER_LIST; 3650d29a5b6aSChristoph Hellwig 3651c66ac9dbSNicholas Bellinger /* 3652c66ac9dbSNicholas Bellinger * From spc4r17 section 6.14: 3653c66ac9dbSNicholas Bellinger * 3654c66ac9dbSNicholas Bellinger * If the SPEC_I_PT bit is set to zero, the service action is not 3655c66ac9dbSNicholas Bellinger * REGISTER AND MOVE, and the parameter list length is not 24, then 3656c66ac9dbSNicholas Bellinger * the command shall be terminated with CHECK CONDITION status, with 3657c66ac9dbSNicholas Bellinger * the sense key set to ILLEGAL REQUEST, and the additional sense 3658c66ac9dbSNicholas Bellinger * code set to PARAMETER LIST LENGTH ERROR. 3659c66ac9dbSNicholas Bellinger */ 36606708bb27SAndy Grover if (!spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER_AND_MOVE) && 3661c66ac9dbSNicholas Bellinger (cmd->data_length != 24)) { 36626708bb27SAndy Grover pr_warn("SPC-PR: Received PR OUT illegal parameter" 3663c66ac9dbSNicholas Bellinger " list length: %u\n", cmd->data_length); 3664de103c93SChristoph Hellwig return TCM_INVALID_PARAMETER_LIST; 3665c66ac9dbSNicholas Bellinger } 3666de103c93SChristoph Hellwig 3667c66ac9dbSNicholas Bellinger /* 3668c66ac9dbSNicholas Bellinger * (core_scsi3_emulate_pro_* function parameters 3669c66ac9dbSNicholas Bellinger * are defined by spc4r17 Table 174: 3670c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_OUT service actions and valid parameters. 3671c66ac9dbSNicholas Bellinger */ 3672c66ac9dbSNicholas Bellinger switch (sa) { 3673c66ac9dbSNicholas Bellinger case PRO_REGISTER: 3674d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_register(cmd, 367533ce6a87SAndy Grover res_key, sa_res_key, aptpl, all_tg_pt, spec_i_pt, REGISTER); 3676d29a5b6aSChristoph Hellwig break; 3677c66ac9dbSNicholas Bellinger case PRO_RESERVE: 3678d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_reserve(cmd, type, scope, res_key); 3679d29a5b6aSChristoph Hellwig break; 3680c66ac9dbSNicholas Bellinger case PRO_RELEASE: 3681d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_release(cmd, type, scope, res_key); 3682d29a5b6aSChristoph Hellwig break; 3683c66ac9dbSNicholas Bellinger case PRO_CLEAR: 3684d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_clear(cmd, res_key); 3685d29a5b6aSChristoph Hellwig break; 3686c66ac9dbSNicholas Bellinger case PRO_PREEMPT: 3687d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_preempt(cmd, type, scope, 368833ce6a87SAndy Grover res_key, sa_res_key, PREEMPT); 3689d29a5b6aSChristoph Hellwig break; 3690c66ac9dbSNicholas Bellinger case PRO_PREEMPT_AND_ABORT: 3691d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_preempt(cmd, type, scope, 369233ce6a87SAndy Grover res_key, sa_res_key, PREEMPT_AND_ABORT); 3693d29a5b6aSChristoph Hellwig break; 3694c66ac9dbSNicholas Bellinger case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: 3695d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_register(cmd, 369633ce6a87SAndy Grover 0, sa_res_key, aptpl, all_tg_pt, spec_i_pt, REGISTER_AND_IGNORE_EXISTING_KEY); 3697d29a5b6aSChristoph Hellwig break; 3698c66ac9dbSNicholas Bellinger case PRO_REGISTER_AND_MOVE: 3699d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_register_and_move(cmd, res_key, 3700c66ac9dbSNicholas Bellinger sa_res_key, aptpl, unreg); 3701d29a5b6aSChristoph Hellwig break; 3702c66ac9dbSNicholas Bellinger default: 37036708bb27SAndy Grover pr_err("Unknown PERSISTENT_RESERVE_OUT service" 3704c66ac9dbSNicholas Bellinger " action: 0x%02x\n", cdb[1] & 0x1f); 3705de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 3706c66ac9dbSNicholas Bellinger } 3707c66ac9dbSNicholas Bellinger 37086bb35e00SChristoph Hellwig if (!ret) 37096bb35e00SChristoph Hellwig target_complete_cmd(cmd, GOOD); 3710d29a5b6aSChristoph Hellwig return ret; 3711c66ac9dbSNicholas Bellinger } 3712c66ac9dbSNicholas Bellinger 3713c66ac9dbSNicholas Bellinger /* 3714c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_IN Service Action READ_KEYS 3715c66ac9dbSNicholas Bellinger * 3716c66ac9dbSNicholas Bellinger * See spc4r17 section 5.7.6.2 and section 6.13.2, Table 160 3717c66ac9dbSNicholas Bellinger */ 3718de103c93SChristoph Hellwig static sense_reason_t 3719de103c93SChristoph Hellwig core_scsi3_pri_read_keys(struct se_cmd *cmd) 3720c66ac9dbSNicholas Bellinger { 37210fd97ccfSChristoph Hellwig struct se_device *dev = cmd->se_dev; 3722c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 372305d1c7c0SAndy Grover unsigned char *buf; 3724c66ac9dbSNicholas Bellinger u32 add_len = 0, off = 8; 3725c66ac9dbSNicholas Bellinger 3726c66ac9dbSNicholas Bellinger if (cmd->data_length < 8) { 37276708bb27SAndy Grover pr_err("PRIN SA READ_KEYS SCSI Data Length: %u" 3728c66ac9dbSNicholas Bellinger " too small\n", cmd->data_length); 3729de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 3730c66ac9dbSNicholas Bellinger } 3731c66ac9dbSNicholas Bellinger 37324949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3733de103c93SChristoph Hellwig if (!buf) 3734de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3735de103c93SChristoph Hellwig 37360fd97ccfSChristoph Hellwig buf[0] = ((dev->t10_pr.pr_generation >> 24) & 0xff); 37370fd97ccfSChristoph Hellwig buf[1] = ((dev->t10_pr.pr_generation >> 16) & 0xff); 37380fd97ccfSChristoph Hellwig buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff); 37390fd97ccfSChristoph Hellwig buf[3] = (dev->t10_pr.pr_generation & 0xff); 3740c66ac9dbSNicholas Bellinger 37410fd97ccfSChristoph Hellwig spin_lock(&dev->t10_pr.registration_lock); 37420fd97ccfSChristoph Hellwig list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 3743c66ac9dbSNicholas Bellinger pr_reg_list) { 3744c66ac9dbSNicholas Bellinger /* 3745c66ac9dbSNicholas Bellinger * Check for overflow of 8byte PRI READ_KEYS payload and 3746c66ac9dbSNicholas Bellinger * next reservation key list descriptor. 3747c66ac9dbSNicholas Bellinger */ 3748c66ac9dbSNicholas Bellinger if ((add_len + 8) > (cmd->data_length - 8)) 3749c66ac9dbSNicholas Bellinger break; 3750c66ac9dbSNicholas Bellinger 3751c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff); 3752c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff); 3753c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff); 3754c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff); 3755c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff); 3756c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff); 3757c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff); 3758c66ac9dbSNicholas Bellinger buf[off++] = (pr_reg->pr_res_key & 0xff); 3759c66ac9dbSNicholas Bellinger 3760c66ac9dbSNicholas Bellinger add_len += 8; 3761c66ac9dbSNicholas Bellinger } 37620fd97ccfSChristoph Hellwig spin_unlock(&dev->t10_pr.registration_lock); 3763c66ac9dbSNicholas Bellinger 3764c66ac9dbSNicholas Bellinger buf[4] = ((add_len >> 24) & 0xff); 3765c66ac9dbSNicholas Bellinger buf[5] = ((add_len >> 16) & 0xff); 3766c66ac9dbSNicholas Bellinger buf[6] = ((add_len >> 8) & 0xff); 3767c66ac9dbSNicholas Bellinger buf[7] = (add_len & 0xff); 3768c66ac9dbSNicholas Bellinger 37694949314cSAndy Grover transport_kunmap_data_sg(cmd); 377005d1c7c0SAndy Grover 3771c66ac9dbSNicholas Bellinger return 0; 3772c66ac9dbSNicholas Bellinger } 3773c66ac9dbSNicholas Bellinger 3774c66ac9dbSNicholas Bellinger /* 3775c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_IN Service Action READ_RESERVATION 3776c66ac9dbSNicholas Bellinger * 3777c66ac9dbSNicholas Bellinger * See spc4r17 section 5.7.6.3 and section 6.13.3.2 Table 161 and 162 3778c66ac9dbSNicholas Bellinger */ 3779de103c93SChristoph Hellwig static sense_reason_t 3780de103c93SChristoph Hellwig core_scsi3_pri_read_reservation(struct se_cmd *cmd) 3781c66ac9dbSNicholas Bellinger { 37820fd97ccfSChristoph Hellwig struct se_device *dev = cmd->se_dev; 3783c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 378405d1c7c0SAndy Grover unsigned char *buf; 3785c66ac9dbSNicholas Bellinger u64 pr_res_key; 3786c66ac9dbSNicholas Bellinger u32 add_len = 16; /* Hardcoded to 16 when a reservation is held. */ 3787c66ac9dbSNicholas Bellinger 3788c66ac9dbSNicholas Bellinger if (cmd->data_length < 8) { 37896708bb27SAndy Grover pr_err("PRIN SA READ_RESERVATIONS SCSI Data Length: %u" 3790c66ac9dbSNicholas Bellinger " too small\n", cmd->data_length); 3791de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 3792c66ac9dbSNicholas Bellinger } 3793c66ac9dbSNicholas Bellinger 37944949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3795de103c93SChristoph Hellwig if (!buf) 3796de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3797de103c93SChristoph Hellwig 37980fd97ccfSChristoph Hellwig buf[0] = ((dev->t10_pr.pr_generation >> 24) & 0xff); 37990fd97ccfSChristoph Hellwig buf[1] = ((dev->t10_pr.pr_generation >> 16) & 0xff); 38000fd97ccfSChristoph Hellwig buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff); 38010fd97ccfSChristoph Hellwig buf[3] = (dev->t10_pr.pr_generation & 0xff); 3802c66ac9dbSNicholas Bellinger 38030fd97ccfSChristoph Hellwig spin_lock(&dev->dev_reservation_lock); 38040fd97ccfSChristoph Hellwig pr_reg = dev->dev_pr_res_holder; 3805ee1b1b9cSAndy Grover if (pr_reg) { 3806c66ac9dbSNicholas Bellinger /* 3807c66ac9dbSNicholas Bellinger * Set the hardcoded Additional Length 3808c66ac9dbSNicholas Bellinger */ 3809c66ac9dbSNicholas Bellinger buf[4] = ((add_len >> 24) & 0xff); 3810c66ac9dbSNicholas Bellinger buf[5] = ((add_len >> 16) & 0xff); 3811c66ac9dbSNicholas Bellinger buf[6] = ((add_len >> 8) & 0xff); 3812c66ac9dbSNicholas Bellinger buf[7] = (add_len & 0xff); 3813c66ac9dbSNicholas Bellinger 381405d1c7c0SAndy Grover if (cmd->data_length < 22) 381505d1c7c0SAndy Grover goto err; 381605d1c7c0SAndy Grover 3817c66ac9dbSNicholas Bellinger /* 3818c66ac9dbSNicholas Bellinger * Set the Reservation key. 3819c66ac9dbSNicholas Bellinger * 3820c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.10: 3821c66ac9dbSNicholas Bellinger * A persistent reservation holder has its reservation key 3822c66ac9dbSNicholas Bellinger * returned in the parameter data from a PERSISTENT 3823c66ac9dbSNicholas Bellinger * RESERVE IN command with READ RESERVATION service action as 3824c66ac9dbSNicholas Bellinger * follows: 3825c66ac9dbSNicholas Bellinger * a) For a persistent reservation of the type Write Exclusive 3826c66ac9dbSNicholas Bellinger * - All Registrants or Exclusive Access All Regitrants, 3827c66ac9dbSNicholas Bellinger * the reservation key shall be set to zero; or 3828c66ac9dbSNicholas Bellinger * b) For all other persistent reservation types, the 3829c66ac9dbSNicholas Bellinger * reservation key shall be set to the registered 3830c66ac9dbSNicholas Bellinger * reservation key for the I_T nexus that holds the 3831c66ac9dbSNicholas Bellinger * persistent reservation. 3832c66ac9dbSNicholas Bellinger */ 3833c66ac9dbSNicholas Bellinger if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 3834c66ac9dbSNicholas Bellinger (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) 3835c66ac9dbSNicholas Bellinger pr_res_key = 0; 3836c66ac9dbSNicholas Bellinger else 3837c66ac9dbSNicholas Bellinger pr_res_key = pr_reg->pr_res_key; 3838c66ac9dbSNicholas Bellinger 3839c66ac9dbSNicholas Bellinger buf[8] = ((pr_res_key >> 56) & 0xff); 3840c66ac9dbSNicholas Bellinger buf[9] = ((pr_res_key >> 48) & 0xff); 3841c66ac9dbSNicholas Bellinger buf[10] = ((pr_res_key >> 40) & 0xff); 3842c66ac9dbSNicholas Bellinger buf[11] = ((pr_res_key >> 32) & 0xff); 3843c66ac9dbSNicholas Bellinger buf[12] = ((pr_res_key >> 24) & 0xff); 3844c66ac9dbSNicholas Bellinger buf[13] = ((pr_res_key >> 16) & 0xff); 3845c66ac9dbSNicholas Bellinger buf[14] = ((pr_res_key >> 8) & 0xff); 3846c66ac9dbSNicholas Bellinger buf[15] = (pr_res_key & 0xff); 3847c66ac9dbSNicholas Bellinger /* 3848c66ac9dbSNicholas Bellinger * Set the SCOPE and TYPE 3849c66ac9dbSNicholas Bellinger */ 3850c66ac9dbSNicholas Bellinger buf[21] = (pr_reg->pr_res_scope & 0xf0) | 3851c66ac9dbSNicholas Bellinger (pr_reg->pr_res_type & 0x0f); 3852c66ac9dbSNicholas Bellinger } 385305d1c7c0SAndy Grover 385405d1c7c0SAndy Grover err: 38550fd97ccfSChristoph Hellwig spin_unlock(&dev->dev_reservation_lock); 38564949314cSAndy Grover transport_kunmap_data_sg(cmd); 3857c66ac9dbSNicholas Bellinger 3858c66ac9dbSNicholas Bellinger return 0; 3859c66ac9dbSNicholas Bellinger } 3860c66ac9dbSNicholas Bellinger 3861c66ac9dbSNicholas Bellinger /* 3862c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_IN Service Action REPORT_CAPABILITIES 3863c66ac9dbSNicholas Bellinger * 3864c66ac9dbSNicholas Bellinger * See spc4r17 section 6.13.4 Table 165 3865c66ac9dbSNicholas Bellinger */ 3866de103c93SChristoph Hellwig static sense_reason_t 3867de103c93SChristoph Hellwig core_scsi3_pri_report_capabilities(struct se_cmd *cmd) 3868c66ac9dbSNicholas Bellinger { 38695951146dSAndy Grover struct se_device *dev = cmd->se_dev; 38700fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 387105d1c7c0SAndy Grover unsigned char *buf; 3872c66ac9dbSNicholas Bellinger u16 add_len = 8; /* Hardcoded to 8. */ 3873c66ac9dbSNicholas Bellinger 3874c66ac9dbSNicholas Bellinger if (cmd->data_length < 6) { 38756708bb27SAndy Grover pr_err("PRIN SA REPORT_CAPABILITIES SCSI Data Length:" 3876c66ac9dbSNicholas Bellinger " %u too small\n", cmd->data_length); 3877de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 3878c66ac9dbSNicholas Bellinger } 3879c66ac9dbSNicholas Bellinger 38804949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3881de103c93SChristoph Hellwig if (!buf) 3882de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 388305d1c7c0SAndy Grover 3884c435285dSJoern Engel buf[0] = ((add_len >> 8) & 0xff); 3885c66ac9dbSNicholas Bellinger buf[1] = (add_len & 0xff); 3886c66ac9dbSNicholas Bellinger buf[2] |= 0x10; /* CRH: Compatible Reservation Hanlding bit. */ 3887c66ac9dbSNicholas Bellinger buf[2] |= 0x08; /* SIP_C: Specify Initiator Ports Capable bit */ 3888c66ac9dbSNicholas Bellinger buf[2] |= 0x04; /* ATP_C: All Target Ports Capable bit */ 3889c66ac9dbSNicholas Bellinger buf[2] |= 0x01; /* PTPL_C: Persistence across Target Power Loss bit */ 3890c66ac9dbSNicholas Bellinger /* 3891c66ac9dbSNicholas Bellinger * We are filling in the PERSISTENT RESERVATION TYPE MASK below, so 3892c66ac9dbSNicholas Bellinger * set the TMV: Task Mask Valid bit. 3893c66ac9dbSNicholas Bellinger */ 3894c66ac9dbSNicholas Bellinger buf[3] |= 0x80; 3895c66ac9dbSNicholas Bellinger /* 3896c66ac9dbSNicholas Bellinger * Change ALLOW COMMANDs to 0x20 or 0x40 later from Table 166 3897c66ac9dbSNicholas Bellinger */ 3898c66ac9dbSNicholas Bellinger buf[3] |= 0x10; /* ALLOW COMMANDs field 001b */ 3899c66ac9dbSNicholas Bellinger /* 3900c66ac9dbSNicholas Bellinger * PTPL_A: Persistence across Target Power Loss Active bit 3901c66ac9dbSNicholas Bellinger */ 3902c66ac9dbSNicholas Bellinger if (pr_tmpl->pr_aptpl_active) 3903c66ac9dbSNicholas Bellinger buf[3] |= 0x01; 3904c66ac9dbSNicholas Bellinger /* 3905c66ac9dbSNicholas Bellinger * Setup the PERSISTENT RESERVATION TYPE MASK from Table 167 3906c66ac9dbSNicholas Bellinger */ 3907c66ac9dbSNicholas Bellinger buf[4] |= 0x80; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ 3908c66ac9dbSNicholas Bellinger buf[4] |= 0x40; /* PR_TYPE_EXCLUSIVE_ACCESS_REGONLY */ 3909c66ac9dbSNicholas Bellinger buf[4] |= 0x20; /* PR_TYPE_WRITE_EXCLUSIVE_REGONLY */ 3910c66ac9dbSNicholas Bellinger buf[4] |= 0x08; /* PR_TYPE_EXCLUSIVE_ACCESS */ 3911c66ac9dbSNicholas Bellinger buf[4] |= 0x02; /* PR_TYPE_WRITE_EXCLUSIVE */ 3912c66ac9dbSNicholas Bellinger buf[5] |= 0x01; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ 3913c66ac9dbSNicholas Bellinger 39144949314cSAndy Grover transport_kunmap_data_sg(cmd); 391505d1c7c0SAndy Grover 3916c66ac9dbSNicholas Bellinger return 0; 3917c66ac9dbSNicholas Bellinger } 3918c66ac9dbSNicholas Bellinger 3919c66ac9dbSNicholas Bellinger /* 3920c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_IN Service Action READ_FULL_STATUS 3921c66ac9dbSNicholas Bellinger * 3922c66ac9dbSNicholas Bellinger * See spc4r17 section 6.13.5 Table 168 and 169 3923c66ac9dbSNicholas Bellinger */ 3924de103c93SChristoph Hellwig static sense_reason_t 3925de103c93SChristoph Hellwig core_scsi3_pri_read_full_status(struct se_cmd *cmd) 3926c66ac9dbSNicholas Bellinger { 39270fd97ccfSChristoph Hellwig struct se_device *dev = cmd->se_dev; 3928c66ac9dbSNicholas Bellinger struct se_node_acl *se_nacl; 3929c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg; 3930c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp; 39310fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 393205d1c7c0SAndy Grover unsigned char *buf; 39332650d71eSChristoph Hellwig u32 add_desc_len = 0, add_len = 0; 3934c66ac9dbSNicholas Bellinger u32 off = 8; /* off into first Full Status descriptor */ 3935d16ca7c5SNicholas Bellinger int format_code = 0, pr_res_type = 0, pr_res_scope = 0; 39362650d71eSChristoph Hellwig int exp_desc_len, desc_len; 3937d16ca7c5SNicholas Bellinger bool all_reg = false; 3938c66ac9dbSNicholas Bellinger 3939c66ac9dbSNicholas Bellinger if (cmd->data_length < 8) { 39406708bb27SAndy Grover pr_err("PRIN SA READ_FULL_STATUS SCSI Data Length: %u" 3941c66ac9dbSNicholas Bellinger " too small\n", cmd->data_length); 3942de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 3943c66ac9dbSNicholas Bellinger } 3944c66ac9dbSNicholas Bellinger 39454949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3946de103c93SChristoph Hellwig if (!buf) 3947de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 394805d1c7c0SAndy Grover 39490fd97ccfSChristoph Hellwig buf[0] = ((dev->t10_pr.pr_generation >> 24) & 0xff); 39500fd97ccfSChristoph Hellwig buf[1] = ((dev->t10_pr.pr_generation >> 16) & 0xff); 39510fd97ccfSChristoph Hellwig buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff); 39520fd97ccfSChristoph Hellwig buf[3] = (dev->t10_pr.pr_generation & 0xff); 3953c66ac9dbSNicholas Bellinger 3954d16ca7c5SNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 3955d16ca7c5SNicholas Bellinger if (dev->dev_pr_res_holder) { 3956d16ca7c5SNicholas Bellinger struct t10_pr_registration *pr_holder = dev->dev_pr_res_holder; 3957d16ca7c5SNicholas Bellinger 3958d16ca7c5SNicholas Bellinger if (pr_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG || 3959d16ca7c5SNicholas Bellinger pr_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG) { 3960d16ca7c5SNicholas Bellinger all_reg = true; 3961d16ca7c5SNicholas Bellinger pr_res_type = pr_holder->pr_res_type; 3962d16ca7c5SNicholas Bellinger pr_res_scope = pr_holder->pr_res_scope; 3963d16ca7c5SNicholas Bellinger } 3964d16ca7c5SNicholas Bellinger } 3965d16ca7c5SNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3966d16ca7c5SNicholas Bellinger 3967c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 3968c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 3969c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 3970c66ac9dbSNicholas Bellinger 3971c66ac9dbSNicholas Bellinger se_nacl = pr_reg->pr_reg_nacl; 3972c66ac9dbSNicholas Bellinger se_tpg = pr_reg->pr_reg_nacl->se_tpg; 3973c66ac9dbSNicholas Bellinger add_desc_len = 0; 3974c66ac9dbSNicholas Bellinger 397533940d09SJoern Engel atomic_inc_mb(&pr_reg->pr_res_holders); 3976c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 3977c66ac9dbSNicholas Bellinger /* 3978c66ac9dbSNicholas Bellinger * Determine expected length of $FABRIC_MOD specific 3979c66ac9dbSNicholas Bellinger * TransportID full status descriptor.. 3980c66ac9dbSNicholas Bellinger */ 39812650d71eSChristoph Hellwig exp_desc_len = target_get_pr_transport_id_len(se_nacl, pr_reg, 39822650d71eSChristoph Hellwig &format_code); 39832650d71eSChristoph Hellwig if (exp_desc_len < 0 || 39842650d71eSChristoph Hellwig exp_desc_len + add_len > cmd->data_length) { 39856708bb27SAndy Grover pr_warn("SPC-3 PRIN READ_FULL_STATUS ran" 3986c66ac9dbSNicholas Bellinger " out of buffer: %d\n", cmd->data_length); 3987c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 398833940d09SJoern Engel atomic_dec_mb(&pr_reg->pr_res_holders); 3989c66ac9dbSNicholas Bellinger break; 3990c66ac9dbSNicholas Bellinger } 3991c66ac9dbSNicholas Bellinger /* 3992c66ac9dbSNicholas Bellinger * Set RESERVATION KEY 3993c66ac9dbSNicholas Bellinger */ 3994c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff); 3995c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff); 3996c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff); 3997c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff); 3998c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff); 3999c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff); 4000c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff); 4001c66ac9dbSNicholas Bellinger buf[off++] = (pr_reg->pr_res_key & 0xff); 4002c66ac9dbSNicholas Bellinger off += 4; /* Skip Over Reserved area */ 4003c66ac9dbSNicholas Bellinger 4004c66ac9dbSNicholas Bellinger /* 4005c66ac9dbSNicholas Bellinger * Set ALL_TG_PT bit if PROUT SA REGISTER had this set. 4006c66ac9dbSNicholas Bellinger */ 4007c66ac9dbSNicholas Bellinger if (pr_reg->pr_reg_all_tg_pt) 4008c66ac9dbSNicholas Bellinger buf[off] = 0x02; 4009c66ac9dbSNicholas Bellinger /* 4010c66ac9dbSNicholas Bellinger * The struct se_lun pointer will be present for the 4011c66ac9dbSNicholas Bellinger * reservation holder for PR_HOLDER bit. 4012c66ac9dbSNicholas Bellinger * 4013c66ac9dbSNicholas Bellinger * Also, if this registration is the reservation 4014d16ca7c5SNicholas Bellinger * holder or there is an All Registrants reservation 4015d16ca7c5SNicholas Bellinger * active, fill in SCOPE and TYPE in the next byte. 4016c66ac9dbSNicholas Bellinger */ 4017c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_holder) { 4018c66ac9dbSNicholas Bellinger buf[off++] |= 0x01; 4019c66ac9dbSNicholas Bellinger buf[off++] = (pr_reg->pr_res_scope & 0xf0) | 4020c66ac9dbSNicholas Bellinger (pr_reg->pr_res_type & 0x0f); 4021d16ca7c5SNicholas Bellinger } else if (all_reg) { 4022d16ca7c5SNicholas Bellinger buf[off++] |= 0x01; 4023d16ca7c5SNicholas Bellinger buf[off++] = (pr_res_scope & 0xf0) | 4024d16ca7c5SNicholas Bellinger (pr_res_type & 0x0f); 4025d16ca7c5SNicholas Bellinger } else { 4026c66ac9dbSNicholas Bellinger off += 2; 4027d16ca7c5SNicholas Bellinger } 4028c66ac9dbSNicholas Bellinger 4029c66ac9dbSNicholas Bellinger off += 4; /* Skip over reserved area */ 4030c66ac9dbSNicholas Bellinger /* 4031c66ac9dbSNicholas Bellinger * From spc4r17 6.3.15: 4032c66ac9dbSNicholas Bellinger * 4033c66ac9dbSNicholas Bellinger * If the ALL_TG_PT bit set to zero, the RELATIVE TARGET PORT 4034c66ac9dbSNicholas Bellinger * IDENTIFIER field contains the relative port identifier (see 4035c66ac9dbSNicholas Bellinger * 3.1.120) of the target port that is part of the I_T nexus 4036c66ac9dbSNicholas Bellinger * described by this full status descriptor. If the ALL_TG_PT 4037c66ac9dbSNicholas Bellinger * bit is set to one, the contents of the RELATIVE TARGET PORT 4038c66ac9dbSNicholas Bellinger * IDENTIFIER field are not defined by this standard. 4039c66ac9dbSNicholas Bellinger */ 40406708bb27SAndy Grover if (!pr_reg->pr_reg_all_tg_pt) { 404179dc9c9eSNicholas Bellinger u16 sep_rtpi = pr_reg->tg_pt_sep_rtpi; 4042c66ac9dbSNicholas Bellinger 404379dc9c9eSNicholas Bellinger buf[off++] = ((sep_rtpi >> 8) & 0xff); 404479dc9c9eSNicholas Bellinger buf[off++] = (sep_rtpi & 0xff); 4045c66ac9dbSNicholas Bellinger } else 404635d1efe8SMasanari Iida off += 2; /* Skip over RELATIVE TARGET PORT IDENTIFIER */ 4047c66ac9dbSNicholas Bellinger 40482650d71eSChristoph Hellwig buf[off+4] = se_tpg->proto_id; 40492650d71eSChristoph Hellwig 4050c66ac9dbSNicholas Bellinger /* 40512650d71eSChristoph Hellwig * Now, have the $FABRIC_MOD fill in the transport ID. 4052c66ac9dbSNicholas Bellinger */ 40532650d71eSChristoph Hellwig desc_len = target_get_pr_transport_id(se_nacl, pr_reg, 40542650d71eSChristoph Hellwig &format_code, &buf[off+4]); 4055c66ac9dbSNicholas Bellinger 4056c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 405733940d09SJoern Engel atomic_dec_mb(&pr_reg->pr_res_holders); 40582650d71eSChristoph Hellwig 40592650d71eSChristoph Hellwig if (desc_len < 0) 40602650d71eSChristoph Hellwig break; 4061c66ac9dbSNicholas Bellinger /* 4062c66ac9dbSNicholas Bellinger * Set the ADDITIONAL DESCRIPTOR LENGTH 4063c66ac9dbSNicholas Bellinger */ 4064c66ac9dbSNicholas Bellinger buf[off++] = ((desc_len >> 24) & 0xff); 4065c66ac9dbSNicholas Bellinger buf[off++] = ((desc_len >> 16) & 0xff); 4066c66ac9dbSNicholas Bellinger buf[off++] = ((desc_len >> 8) & 0xff); 4067c66ac9dbSNicholas Bellinger buf[off++] = (desc_len & 0xff); 4068c66ac9dbSNicholas Bellinger /* 4069c66ac9dbSNicholas Bellinger * Size of full desctipor header minus TransportID 4070c66ac9dbSNicholas Bellinger * containing $FABRIC_MOD specific) initiator device/port 4071c66ac9dbSNicholas Bellinger * WWN information. 4072c66ac9dbSNicholas Bellinger * 4073c66ac9dbSNicholas Bellinger * See spc4r17 Section 6.13.5 Table 169 4074c66ac9dbSNicholas Bellinger */ 4075c66ac9dbSNicholas Bellinger add_desc_len = (24 + desc_len); 4076c66ac9dbSNicholas Bellinger 4077c66ac9dbSNicholas Bellinger off += desc_len; 4078c66ac9dbSNicholas Bellinger add_len += add_desc_len; 4079c66ac9dbSNicholas Bellinger } 4080c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 4081c66ac9dbSNicholas Bellinger /* 4082c66ac9dbSNicholas Bellinger * Set ADDITIONAL_LENGTH 4083c66ac9dbSNicholas Bellinger */ 4084c66ac9dbSNicholas Bellinger buf[4] = ((add_len >> 24) & 0xff); 4085c66ac9dbSNicholas Bellinger buf[5] = ((add_len >> 16) & 0xff); 4086c66ac9dbSNicholas Bellinger buf[6] = ((add_len >> 8) & 0xff); 4087c66ac9dbSNicholas Bellinger buf[7] = (add_len & 0xff); 4088c66ac9dbSNicholas Bellinger 40894949314cSAndy Grover transport_kunmap_data_sg(cmd); 409005d1c7c0SAndy Grover 4091c66ac9dbSNicholas Bellinger return 0; 4092c66ac9dbSNicholas Bellinger } 4093c66ac9dbSNicholas Bellinger 4094de103c93SChristoph Hellwig sense_reason_t 4095de103c93SChristoph Hellwig target_scsi3_emulate_pr_in(struct se_cmd *cmd) 4096c66ac9dbSNicholas Bellinger { 4097de103c93SChristoph Hellwig sense_reason_t ret; 4098e76a35d6SChristoph Hellwig 4099617c0e06SChristoph Hellwig /* 4100617c0e06SChristoph Hellwig * Following spc2r20 5.5.1 Reservations overview: 4101617c0e06SChristoph Hellwig * 4102617c0e06SChristoph Hellwig * If a logical unit has been reserved by any RESERVE command and is 4103617c0e06SChristoph Hellwig * still reserved by any initiator, all PERSISTENT RESERVE IN and all 4104617c0e06SChristoph Hellwig * PERSISTENT RESERVE OUT commands shall conflict regardless of 4105617c0e06SChristoph Hellwig * initiator or service action and shall terminate with a RESERVATION 4106617c0e06SChristoph Hellwig * CONFLICT status. 4107617c0e06SChristoph Hellwig */ 41080fd97ccfSChristoph Hellwig if (cmd->se_dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) { 4109617c0e06SChristoph Hellwig pr_err("Received PERSISTENT_RESERVE CDB while legacy" 4110617c0e06SChristoph Hellwig " SPC-2 reservation is held, returning" 4111617c0e06SChristoph Hellwig " RESERVATION_CONFLICT\n"); 4112de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 4113617c0e06SChristoph Hellwig } 4114617c0e06SChristoph Hellwig 4115617c0e06SChristoph Hellwig switch (cmd->t_task_cdb[1] & 0x1f) { 4116c66ac9dbSNicholas Bellinger case PRI_READ_KEYS: 4117d29a5b6aSChristoph Hellwig ret = core_scsi3_pri_read_keys(cmd); 4118d29a5b6aSChristoph Hellwig break; 4119c66ac9dbSNicholas Bellinger case PRI_READ_RESERVATION: 4120d29a5b6aSChristoph Hellwig ret = core_scsi3_pri_read_reservation(cmd); 4121d29a5b6aSChristoph Hellwig break; 4122c66ac9dbSNicholas Bellinger case PRI_REPORT_CAPABILITIES: 4123d29a5b6aSChristoph Hellwig ret = core_scsi3_pri_report_capabilities(cmd); 4124d29a5b6aSChristoph Hellwig break; 4125c66ac9dbSNicholas Bellinger case PRI_READ_FULL_STATUS: 4126d29a5b6aSChristoph Hellwig ret = core_scsi3_pri_read_full_status(cmd); 4127d29a5b6aSChristoph Hellwig break; 4128c66ac9dbSNicholas Bellinger default: 41296708bb27SAndy Grover pr_err("Unknown PERSISTENT_RESERVE_IN service" 4130617c0e06SChristoph Hellwig " action: 0x%02x\n", cmd->t_task_cdb[1] & 0x1f); 4131de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 4132c66ac9dbSNicholas Bellinger } 4133d29a5b6aSChristoph Hellwig 41346bb35e00SChristoph Hellwig if (!ret) 41356bb35e00SChristoph Hellwig target_complete_cmd(cmd, GOOD); 4136d29a5b6aSChristoph Hellwig return ret; 4137c66ac9dbSNicholas Bellinger } 4138c66ac9dbSNicholas Bellinger 4139de103c93SChristoph Hellwig sense_reason_t 4140de103c93SChristoph Hellwig target_check_reservation(struct se_cmd *cmd) 4141c66ac9dbSNicholas Bellinger { 4142d977f437SChristoph Hellwig struct se_device *dev = cmd->se_dev; 4143de103c93SChristoph Hellwig sense_reason_t ret; 4144d977f437SChristoph Hellwig 4145d977f437SChristoph Hellwig if (!cmd->se_sess) 4146c66ac9dbSNicholas Bellinger return 0; 4147d977f437SChristoph Hellwig if (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE) 4148c66ac9dbSNicholas Bellinger return 0; 4149a3541703SAndy Grover if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) 4150d977f437SChristoph Hellwig return 0; 4151c66ac9dbSNicholas Bellinger 4152d977f437SChristoph Hellwig spin_lock(&dev->dev_reservation_lock); 4153d977f437SChristoph Hellwig if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 4154d977f437SChristoph Hellwig ret = target_scsi2_reservation_check(cmd); 4155d977f437SChristoph Hellwig else 4156d977f437SChristoph Hellwig ret = target_scsi3_pr_reservation_check(cmd); 4157d977f437SChristoph Hellwig spin_unlock(&dev->dev_reservation_lock); 41580fd97ccfSChristoph Hellwig 4159d977f437SChristoph Hellwig return ret; 4160c66ac9dbSNicholas Bellinger } 4161