1c66ac9dbSNicholas Bellinger /******************************************************************************* 2c66ac9dbSNicholas Bellinger * Filename: target_core_pr.c 3c66ac9dbSNicholas Bellinger * 4c66ac9dbSNicholas Bellinger * This file contains SPC-3 compliant persistent reservations and 5c66ac9dbSNicholas Bellinger * legacy SPC-2 reservations with compatible reservation handling (CRH=1) 6c66ac9dbSNicholas Bellinger * 74c76251eSNicholas Bellinger * (c) Copyright 2009-2013 Datera, Inc. 8c66ac9dbSNicholas Bellinger * 9c66ac9dbSNicholas Bellinger * Nicholas A. Bellinger <nab@kernel.org> 10c66ac9dbSNicholas Bellinger * 11c66ac9dbSNicholas Bellinger * This program is free software; you can redistribute it and/or modify 12c66ac9dbSNicholas Bellinger * it under the terms of the GNU General Public License as published by 13c66ac9dbSNicholas Bellinger * the Free Software Foundation; either version 2 of the License, or 14c66ac9dbSNicholas Bellinger * (at your option) any later version. 15c66ac9dbSNicholas Bellinger * 16c66ac9dbSNicholas Bellinger * This program is distributed in the hope that it will be useful, 17c66ac9dbSNicholas Bellinger * but WITHOUT ANY WARRANTY; without even the implied warranty of 18c66ac9dbSNicholas Bellinger * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19c66ac9dbSNicholas Bellinger * GNU General Public License for more details. 20c66ac9dbSNicholas Bellinger * 21c66ac9dbSNicholas Bellinger * You should have received a copy of the GNU General Public License 22c66ac9dbSNicholas Bellinger * along with this program; if not, write to the Free Software 23c66ac9dbSNicholas Bellinger * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 24c66ac9dbSNicholas Bellinger * 25c66ac9dbSNicholas Bellinger ******************************************************************************/ 26c66ac9dbSNicholas Bellinger 27c66ac9dbSNicholas Bellinger #include <linux/slab.h> 28c66ac9dbSNicholas Bellinger #include <linux/spinlock.h> 29c66ac9dbSNicholas Bellinger #include <linux/list.h> 300e9b10a9SAl Viro #include <linux/file.h> 31c66ac9dbSNicholas Bellinger #include <scsi/scsi.h> 32c66ac9dbSNicholas Bellinger #include <scsi/scsi_cmnd.h> 33c66ac9dbSNicholas Bellinger #include <asm/unaligned.h> 34c66ac9dbSNicholas Bellinger 35c66ac9dbSNicholas Bellinger #include <target/target_core_base.h> 36c4795fb2SChristoph Hellwig #include <target/target_core_backend.h> 37c4795fb2SChristoph Hellwig #include <target/target_core_fabric.h> 38c66ac9dbSNicholas Bellinger #include <target/target_core_configfs.h> 39c66ac9dbSNicholas Bellinger 40e26d99aeSChristoph Hellwig #include "target_core_internal.h" 41c66ac9dbSNicholas Bellinger #include "target_core_pr.h" 42c66ac9dbSNicholas Bellinger #include "target_core_ua.h" 43c66ac9dbSNicholas Bellinger 44c66ac9dbSNicholas Bellinger /* 45c66ac9dbSNicholas Bellinger * Used for Specify Initiator Ports Capable Bit (SPEC_I_PT) 46c66ac9dbSNicholas Bellinger */ 47c66ac9dbSNicholas Bellinger struct pr_transport_id_holder { 48c66ac9dbSNicholas Bellinger int dest_local_nexus; 49c66ac9dbSNicholas Bellinger struct t10_pr_registration *dest_pr_reg; 50c66ac9dbSNicholas Bellinger struct se_portal_group *dest_tpg; 51c66ac9dbSNicholas Bellinger struct se_node_acl *dest_node_acl; 52c66ac9dbSNicholas Bellinger struct se_dev_entry *dest_se_deve; 53c66ac9dbSNicholas Bellinger struct list_head dest_list; 54c66ac9dbSNicholas Bellinger }; 55c66ac9dbSNicholas Bellinger 56d2843c17SAndy Grover void core_pr_dump_initiator_port( 57c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 58c66ac9dbSNicholas Bellinger char *buf, 59c66ac9dbSNicholas Bellinger u32 size) 60c66ac9dbSNicholas Bellinger { 616708bb27SAndy Grover if (!pr_reg->isid_present_at_reg) 62d2843c17SAndy Grover buf[0] = '\0'; 63c66ac9dbSNicholas Bellinger 64d2843c17SAndy Grover snprintf(buf, size, ",i,0x%s", pr_reg->pr_reg_isid); 65c66ac9dbSNicholas Bellinger } 66c66ac9dbSNicholas Bellinger 6733ce6a87SAndy Grover enum register_type { 6833ce6a87SAndy Grover REGISTER, 6933ce6a87SAndy Grover REGISTER_AND_IGNORE_EXISTING_KEY, 7033ce6a87SAndy Grover REGISTER_AND_MOVE, 7133ce6a87SAndy Grover }; 7233ce6a87SAndy Grover 7333ce6a87SAndy Grover enum preempt_type { 7433ce6a87SAndy Grover PREEMPT, 7533ce6a87SAndy Grover PREEMPT_AND_ABORT, 7633ce6a87SAndy Grover }; 7733ce6a87SAndy Grover 78c66ac9dbSNicholas Bellinger static void __core_scsi3_complete_pro_release(struct se_device *, struct se_node_acl *, 796c3c9baaSNicholas Bellinger struct t10_pr_registration *, int, int); 80c66ac9dbSNicholas Bellinger 81e673dc92SIlias Tsitsimpis static int is_reservation_holder( 82e673dc92SIlias Tsitsimpis struct t10_pr_registration *pr_res_holder, 83e673dc92SIlias Tsitsimpis struct t10_pr_registration *pr_reg) 84e673dc92SIlias Tsitsimpis { 85e673dc92SIlias Tsitsimpis int pr_res_type; 86e673dc92SIlias Tsitsimpis 87e673dc92SIlias Tsitsimpis if (pr_res_holder) { 88e673dc92SIlias Tsitsimpis pr_res_type = pr_res_holder->pr_res_type; 89e673dc92SIlias Tsitsimpis 90e673dc92SIlias Tsitsimpis return pr_res_holder == pr_reg || 91e673dc92SIlias Tsitsimpis pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG || 92e673dc92SIlias Tsitsimpis pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG; 93e673dc92SIlias Tsitsimpis } 94e673dc92SIlias Tsitsimpis return 0; 95e673dc92SIlias Tsitsimpis } 96e673dc92SIlias Tsitsimpis 97de103c93SChristoph Hellwig static sense_reason_t 98de103c93SChristoph Hellwig target_scsi2_reservation_check(struct se_cmd *cmd) 99c66ac9dbSNicholas Bellinger { 100d977f437SChristoph Hellwig struct se_device *dev = cmd->se_dev; 101d977f437SChristoph Hellwig struct se_session *sess = cmd->se_sess; 102d977f437SChristoph Hellwig 103d977f437SChristoph Hellwig switch (cmd->t_task_cdb[0]) { 104c66ac9dbSNicholas Bellinger case INQUIRY: 105c66ac9dbSNicholas Bellinger case RELEASE: 106c66ac9dbSNicholas Bellinger case RELEASE_10: 107c66ac9dbSNicholas Bellinger return 0; 108c66ac9dbSNicholas Bellinger default: 109d977f437SChristoph Hellwig break; 110c66ac9dbSNicholas Bellinger } 111c66ac9dbSNicholas Bellinger 112d977f437SChristoph Hellwig if (!dev->dev_reserved_node_acl || !sess) 113c66ac9dbSNicholas Bellinger return 0; 114c66ac9dbSNicholas Bellinger 115d977f437SChristoph Hellwig if (dev->dev_reserved_node_acl != sess->se_node_acl) 116de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 117c66ac9dbSNicholas Bellinger 118d977f437SChristoph Hellwig if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS_WITH_ISID) { 119d977f437SChristoph Hellwig if (dev->dev_res_bin_isid != sess->sess_bin_isid) 120de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 121d977f437SChristoph Hellwig } 122d977f437SChristoph Hellwig 123d977f437SChristoph Hellwig return 0; 124c66ac9dbSNicholas Bellinger } 125c66ac9dbSNicholas Bellinger 126eacac00cSChristoph Hellwig static struct t10_pr_registration *core_scsi3_locate_pr_reg(struct se_device *, 127eacac00cSChristoph Hellwig struct se_node_acl *, struct se_session *); 128eacac00cSChristoph Hellwig static void core_scsi3_put_pr_reg(struct t10_pr_registration *); 129eacac00cSChristoph Hellwig 130087a03b3SNicholas Bellinger static int target_check_scsi2_reservation_conflict(struct se_cmd *cmd) 131eacac00cSChristoph Hellwig { 132eacac00cSChristoph Hellwig struct se_session *se_sess = cmd->se_sess; 1330fd97ccfSChristoph Hellwig struct se_device *dev = cmd->se_dev; 134eacac00cSChristoph Hellwig struct t10_pr_registration *pr_reg; 1350fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 136eacac00cSChristoph Hellwig int conflict = 0; 137eacac00cSChristoph Hellwig 138eacac00cSChristoph Hellwig pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, 139eacac00cSChristoph Hellwig se_sess); 140eacac00cSChristoph Hellwig if (pr_reg) { 141eacac00cSChristoph Hellwig /* 142eacac00cSChristoph Hellwig * From spc4r17 5.7.3 Exceptions to SPC-2 RESERVE and RELEASE 143eacac00cSChristoph Hellwig * behavior 144eacac00cSChristoph Hellwig * 145eacac00cSChristoph Hellwig * A RESERVE(6) or RESERVE(10) command shall complete with GOOD 146eacac00cSChristoph Hellwig * status, but no reservation shall be established and the 147eacac00cSChristoph Hellwig * persistent reservation shall not be changed, if the command 148eacac00cSChristoph Hellwig * is received from a) and b) below. 149eacac00cSChristoph Hellwig * 150eacac00cSChristoph Hellwig * A RELEASE(6) or RELEASE(10) command shall complete with GOOD 151eacac00cSChristoph Hellwig * status, but the persistent reservation shall not be released, 152eacac00cSChristoph Hellwig * if the command is received from a) and b) 153eacac00cSChristoph Hellwig * 154eacac00cSChristoph Hellwig * a) An I_T nexus that is a persistent reservation holder; or 155eacac00cSChristoph Hellwig * b) An I_T nexus that is registered if a registrants only or 156eacac00cSChristoph Hellwig * all registrants type persistent reservation is present. 157eacac00cSChristoph Hellwig * 158eacac00cSChristoph Hellwig * In all other cases, a RESERVE(6) command, RESERVE(10) command, 159eacac00cSChristoph Hellwig * RELEASE(6) command, or RELEASE(10) command shall be processed 160eacac00cSChristoph Hellwig * as defined in SPC-2. 161eacac00cSChristoph Hellwig */ 162eacac00cSChristoph Hellwig if (pr_reg->pr_res_holder) { 163eacac00cSChristoph Hellwig core_scsi3_put_pr_reg(pr_reg); 164087a03b3SNicholas Bellinger return 1; 165eacac00cSChristoph Hellwig } 166eacac00cSChristoph Hellwig if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY) || 167eacac00cSChristoph Hellwig (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) || 168eacac00cSChristoph Hellwig (pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 169eacac00cSChristoph Hellwig (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { 170eacac00cSChristoph Hellwig core_scsi3_put_pr_reg(pr_reg); 171087a03b3SNicholas Bellinger return 1; 172eacac00cSChristoph Hellwig } 173eacac00cSChristoph Hellwig core_scsi3_put_pr_reg(pr_reg); 174eacac00cSChristoph Hellwig conflict = 1; 175eacac00cSChristoph Hellwig } else { 176eacac00cSChristoph Hellwig /* 177eacac00cSChristoph Hellwig * Following spc2r20 5.5.1 Reservations overview: 178eacac00cSChristoph Hellwig * 179eacac00cSChristoph Hellwig * If a logical unit has executed a PERSISTENT RESERVE OUT 180eacac00cSChristoph Hellwig * command with the REGISTER or the REGISTER AND IGNORE 181eacac00cSChristoph Hellwig * EXISTING KEY service action and is still registered by any 182eacac00cSChristoph Hellwig * initiator, all RESERVE commands and all RELEASE commands 183eacac00cSChristoph Hellwig * regardless of initiator shall conflict and shall terminate 184eacac00cSChristoph Hellwig * with a RESERVATION CONFLICT status. 185eacac00cSChristoph Hellwig */ 186eacac00cSChristoph Hellwig spin_lock(&pr_tmpl->registration_lock); 187eacac00cSChristoph Hellwig conflict = (list_empty(&pr_tmpl->registration_list)) ? 0 : 1; 188eacac00cSChristoph Hellwig spin_unlock(&pr_tmpl->registration_lock); 189eacac00cSChristoph Hellwig } 190eacac00cSChristoph Hellwig 191eacac00cSChristoph Hellwig if (conflict) { 192eacac00cSChristoph Hellwig pr_err("Received legacy SPC-2 RESERVE/RELEASE" 193eacac00cSChristoph Hellwig " while active SPC-3 registrations exist," 194eacac00cSChristoph Hellwig " returning RESERVATION_CONFLICT\n"); 195087a03b3SNicholas Bellinger return -EBUSY; 196eacac00cSChristoph Hellwig } 197eacac00cSChristoph Hellwig 198087a03b3SNicholas Bellinger return 0; 199eacac00cSChristoph Hellwig } 200eacac00cSChristoph Hellwig 201de103c93SChristoph Hellwig sense_reason_t 202de103c93SChristoph Hellwig target_scsi2_reservation_release(struct se_cmd *cmd) 203c66ac9dbSNicholas Bellinger { 204c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 205c66ac9dbSNicholas Bellinger struct se_session *sess = cmd->se_sess; 206609234e3SWei Yongjun struct se_portal_group *tpg; 207de103c93SChristoph Hellwig int rc; 208c66ac9dbSNicholas Bellinger 209609234e3SWei Yongjun if (!sess || !sess->se_tpg) 210d29a5b6aSChristoph Hellwig goto out; 211087a03b3SNicholas Bellinger rc = target_check_scsi2_reservation_conflict(cmd); 212087a03b3SNicholas Bellinger if (rc == 1) 213d29a5b6aSChristoph Hellwig goto out; 214de103c93SChristoph Hellwig if (rc < 0) 215de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 216c66ac9dbSNicholas Bellinger 217c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 218d29a5b6aSChristoph Hellwig if (!dev->dev_reserved_node_acl || !sess) 219d29a5b6aSChristoph Hellwig goto out_unlock; 220c66ac9dbSNicholas Bellinger 221d29a5b6aSChristoph Hellwig if (dev->dev_reserved_node_acl != sess->se_node_acl) 222d29a5b6aSChristoph Hellwig goto out_unlock; 223d29a5b6aSChristoph Hellwig 224edc318d9SBernhard Kohl if (dev->dev_res_bin_isid != sess->sess_bin_isid) 225edc318d9SBernhard Kohl goto out_unlock; 226edc318d9SBernhard Kohl 227c66ac9dbSNicholas Bellinger dev->dev_reserved_node_acl = NULL; 2280fd97ccfSChristoph Hellwig dev->dev_reservation_flags &= ~DRF_SPC2_RESERVATIONS; 2290fd97ccfSChristoph Hellwig if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS_WITH_ISID) { 230c66ac9dbSNicholas Bellinger dev->dev_res_bin_isid = 0; 2310fd97ccfSChristoph Hellwig dev->dev_reservation_flags &= ~DRF_SPC2_RESERVATIONS_WITH_ISID; 232c66ac9dbSNicholas Bellinger } 233609234e3SWei Yongjun tpg = sess->se_tpg; 2346708bb27SAndy Grover pr_debug("SCSI-2 Released reservation for %s LUN: %u ->" 235e3d6f909SAndy Grover " MAPPED LUN: %u for %s\n", tpg->se_tpg_tfo->get_fabric_name(), 236e3d6f909SAndy Grover cmd->se_lun->unpacked_lun, cmd->se_deve->mapped_lun, 237c66ac9dbSNicholas Bellinger sess->se_node_acl->initiatorname); 238c66ac9dbSNicholas Bellinger 239d29a5b6aSChristoph Hellwig out_unlock: 240d29a5b6aSChristoph Hellwig spin_unlock(&dev->dev_reservation_lock); 241d29a5b6aSChristoph Hellwig out: 2426bb35e00SChristoph Hellwig target_complete_cmd(cmd, GOOD); 243de103c93SChristoph Hellwig return 0; 244c66ac9dbSNicholas Bellinger } 245c66ac9dbSNicholas Bellinger 246de103c93SChristoph Hellwig sense_reason_t 247de103c93SChristoph Hellwig target_scsi2_reservation_reserve(struct se_cmd *cmd) 248c66ac9dbSNicholas Bellinger { 249c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 250c66ac9dbSNicholas Bellinger struct se_session *sess = cmd->se_sess; 251609234e3SWei Yongjun struct se_portal_group *tpg; 252de103c93SChristoph Hellwig sense_reason_t ret = 0; 253de103c93SChristoph Hellwig int rc; 254c66ac9dbSNicholas Bellinger 255a1d8b49aSAndy Grover if ((cmd->t_task_cdb[1] & 0x01) && 256a1d8b49aSAndy Grover (cmd->t_task_cdb[1] & 0x02)) { 2576708bb27SAndy Grover pr_err("LongIO and Obselete Bits set, returning" 258c66ac9dbSNicholas Bellinger " ILLEGAL_REQUEST\n"); 259de103c93SChristoph Hellwig return TCM_UNSUPPORTED_SCSI_OPCODE; 260c66ac9dbSNicholas Bellinger } 261c66ac9dbSNicholas Bellinger /* 262c66ac9dbSNicholas Bellinger * This is currently the case for target_core_mod passthrough struct se_cmd 263c66ac9dbSNicholas Bellinger * ops 264c66ac9dbSNicholas Bellinger */ 265609234e3SWei Yongjun if (!sess || !sess->se_tpg) 266d29a5b6aSChristoph Hellwig goto out; 267087a03b3SNicholas Bellinger rc = target_check_scsi2_reservation_conflict(cmd); 268087a03b3SNicholas Bellinger if (rc == 1) 269d29a5b6aSChristoph Hellwig goto out; 270c66ac9dbSNicholas Bellinger 271de103c93SChristoph Hellwig if (rc < 0) 272de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 273de103c93SChristoph Hellwig 274609234e3SWei Yongjun tpg = sess->se_tpg; 275c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 276c66ac9dbSNicholas Bellinger if (dev->dev_reserved_node_acl && 277c66ac9dbSNicholas Bellinger (dev->dev_reserved_node_acl != sess->se_node_acl)) { 2786708bb27SAndy Grover pr_err("SCSI-2 RESERVATION CONFLIFT for %s fabric\n", 279e3d6f909SAndy Grover tpg->se_tpg_tfo->get_fabric_name()); 2806708bb27SAndy Grover pr_err("Original reserver LUN: %u %s\n", 281e3d6f909SAndy Grover cmd->se_lun->unpacked_lun, 282c66ac9dbSNicholas Bellinger dev->dev_reserved_node_acl->initiatorname); 2836708bb27SAndy Grover pr_err("Current attempt - LUN: %u -> MAPPED LUN: %u" 284e3d6f909SAndy Grover " from %s \n", cmd->se_lun->unpacked_lun, 285c66ac9dbSNicholas Bellinger cmd->se_deve->mapped_lun, 286c66ac9dbSNicholas Bellinger sess->se_node_acl->initiatorname); 287de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 288d29a5b6aSChristoph Hellwig goto out_unlock; 289c66ac9dbSNicholas Bellinger } 290c66ac9dbSNicholas Bellinger 291c66ac9dbSNicholas Bellinger dev->dev_reserved_node_acl = sess->se_node_acl; 2920fd97ccfSChristoph Hellwig dev->dev_reservation_flags |= DRF_SPC2_RESERVATIONS; 293c66ac9dbSNicholas Bellinger if (sess->sess_bin_isid != 0) { 294c66ac9dbSNicholas Bellinger dev->dev_res_bin_isid = sess->sess_bin_isid; 2950fd97ccfSChristoph Hellwig dev->dev_reservation_flags |= DRF_SPC2_RESERVATIONS_WITH_ISID; 296c66ac9dbSNicholas Bellinger } 2976708bb27SAndy Grover pr_debug("SCSI-2 Reserved %s LUN: %u -> MAPPED LUN: %u" 298e3d6f909SAndy Grover " for %s\n", tpg->se_tpg_tfo->get_fabric_name(), 299e3d6f909SAndy Grover cmd->se_lun->unpacked_lun, cmd->se_deve->mapped_lun, 300c66ac9dbSNicholas Bellinger sess->se_node_acl->initiatorname); 301c66ac9dbSNicholas Bellinger 302d29a5b6aSChristoph Hellwig out_unlock: 303d29a5b6aSChristoph Hellwig spin_unlock(&dev->dev_reservation_lock); 304d29a5b6aSChristoph Hellwig out: 3056bb35e00SChristoph Hellwig if (!ret) 3066bb35e00SChristoph Hellwig target_complete_cmd(cmd, GOOD); 307d29a5b6aSChristoph Hellwig return ret; 308c66ac9dbSNicholas Bellinger } 309c66ac9dbSNicholas Bellinger 310c66ac9dbSNicholas Bellinger 311c66ac9dbSNicholas Bellinger /* 312c66ac9dbSNicholas Bellinger * Begin SPC-3/SPC-4 Persistent Reservations emulation support 313c66ac9dbSNicholas Bellinger * 314c66ac9dbSNicholas Bellinger * This function is called by those initiator ports who are *NOT* 315c66ac9dbSNicholas Bellinger * the active PR reservation holder when a reservation is present. 316c66ac9dbSNicholas Bellinger */ 317c66ac9dbSNicholas Bellinger static int core_scsi3_pr_seq_non_holder( 318c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 319c66ac9dbSNicholas Bellinger u32 pr_reg_type) 320c66ac9dbSNicholas Bellinger { 321d977f437SChristoph Hellwig unsigned char *cdb = cmd->t_task_cdb; 322c66ac9dbSNicholas Bellinger struct se_dev_entry *se_deve; 323e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 324c66ac9dbSNicholas Bellinger int other_cdb = 0, ignore_reg; 325c66ac9dbSNicholas Bellinger int registered_nexus = 0, ret = 1; /* Conflict by default */ 326c66ac9dbSNicholas Bellinger int all_reg = 0, reg_only = 0; /* ALL_REG, REG_ONLY */ 327c66ac9dbSNicholas Bellinger int we = 0; /* Write Exclusive */ 328c66ac9dbSNicholas Bellinger int legacy = 0; /* Act like a legacy device and return 329c66ac9dbSNicholas Bellinger * RESERVATION CONFLICT on some CDBs */ 330c66ac9dbSNicholas Bellinger 331f2083241SJörn Engel se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; 332c66ac9dbSNicholas Bellinger /* 333c66ac9dbSNicholas Bellinger * Determine if the registration should be ignored due to 334d977f437SChristoph Hellwig * non-matching ISIDs in target_scsi3_pr_reservation_check(). 335c66ac9dbSNicholas Bellinger */ 336c66ac9dbSNicholas Bellinger ignore_reg = (pr_reg_type & 0x80000000); 337c66ac9dbSNicholas Bellinger if (ignore_reg) 338c66ac9dbSNicholas Bellinger pr_reg_type &= ~0x80000000; 339c66ac9dbSNicholas Bellinger 340c66ac9dbSNicholas Bellinger switch (pr_reg_type) { 341c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE: 342c66ac9dbSNicholas Bellinger we = 1; 343c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS: 344c66ac9dbSNicholas Bellinger /* 345c66ac9dbSNicholas Bellinger * Some commands are only allowed for the persistent reservation 346c66ac9dbSNicholas Bellinger * holder. 347c66ac9dbSNicholas Bellinger */ 348c66ac9dbSNicholas Bellinger if ((se_deve->def_pr_registered) && !(ignore_reg)) 349c66ac9dbSNicholas Bellinger registered_nexus = 1; 350c66ac9dbSNicholas Bellinger break; 351c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: 352c66ac9dbSNicholas Bellinger we = 1; 353c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: 354c66ac9dbSNicholas Bellinger /* 355c66ac9dbSNicholas Bellinger * Some commands are only allowed for registered I_T Nexuses. 356c66ac9dbSNicholas Bellinger */ 357c66ac9dbSNicholas Bellinger reg_only = 1; 358c66ac9dbSNicholas Bellinger if ((se_deve->def_pr_registered) && !(ignore_reg)) 359c66ac9dbSNicholas Bellinger registered_nexus = 1; 360c66ac9dbSNicholas Bellinger break; 361c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: 362c66ac9dbSNicholas Bellinger we = 1; 363c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: 364c66ac9dbSNicholas Bellinger /* 365c66ac9dbSNicholas Bellinger * Each registered I_T Nexus is a reservation holder. 366c66ac9dbSNicholas Bellinger */ 367c66ac9dbSNicholas Bellinger all_reg = 1; 368c66ac9dbSNicholas Bellinger if ((se_deve->def_pr_registered) && !(ignore_reg)) 369c66ac9dbSNicholas Bellinger registered_nexus = 1; 370c66ac9dbSNicholas Bellinger break; 371c66ac9dbSNicholas Bellinger default: 372e3d6f909SAndy Grover return -EINVAL; 373c66ac9dbSNicholas Bellinger } 374c66ac9dbSNicholas Bellinger /* 375c66ac9dbSNicholas Bellinger * Referenced from spc4r17 table 45 for *NON* PR holder access 376c66ac9dbSNicholas Bellinger */ 377c66ac9dbSNicholas Bellinger switch (cdb[0]) { 378c66ac9dbSNicholas Bellinger case SECURITY_PROTOCOL_IN: 379c66ac9dbSNicholas Bellinger if (registered_nexus) 380c66ac9dbSNicholas Bellinger return 0; 381c66ac9dbSNicholas Bellinger ret = (we) ? 0 : 1; 382c66ac9dbSNicholas Bellinger break; 383c66ac9dbSNicholas Bellinger case MODE_SENSE: 384c66ac9dbSNicholas Bellinger case MODE_SENSE_10: 385c66ac9dbSNicholas Bellinger case READ_ATTRIBUTE: 386c66ac9dbSNicholas Bellinger case READ_BUFFER: 387c66ac9dbSNicholas Bellinger case RECEIVE_DIAGNOSTIC: 388c66ac9dbSNicholas Bellinger if (legacy) { 389c66ac9dbSNicholas Bellinger ret = 1; 390c66ac9dbSNicholas Bellinger break; 391c66ac9dbSNicholas Bellinger } 392c66ac9dbSNicholas Bellinger if (registered_nexus) { 393c66ac9dbSNicholas Bellinger ret = 0; 394c66ac9dbSNicholas Bellinger break; 395c66ac9dbSNicholas Bellinger } 396c66ac9dbSNicholas Bellinger ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ 397c66ac9dbSNicholas Bellinger break; 398c66ac9dbSNicholas Bellinger case PERSISTENT_RESERVE_OUT: 399c66ac9dbSNicholas Bellinger /* 400c66ac9dbSNicholas Bellinger * This follows PERSISTENT_RESERVE_OUT service actions that 401c66ac9dbSNicholas Bellinger * are allowed in the presence of various reservations. 402c66ac9dbSNicholas Bellinger * See spc4r17, table 46 403c66ac9dbSNicholas Bellinger */ 404c66ac9dbSNicholas Bellinger switch (cdb[1] & 0x1f) { 405c66ac9dbSNicholas Bellinger case PRO_CLEAR: 406c66ac9dbSNicholas Bellinger case PRO_PREEMPT: 407c66ac9dbSNicholas Bellinger case PRO_PREEMPT_AND_ABORT: 408c66ac9dbSNicholas Bellinger ret = (registered_nexus) ? 0 : 1; 409c66ac9dbSNicholas Bellinger break; 410c66ac9dbSNicholas Bellinger case PRO_REGISTER: 411c66ac9dbSNicholas Bellinger case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: 412c66ac9dbSNicholas Bellinger ret = 0; 413c66ac9dbSNicholas Bellinger break; 414c66ac9dbSNicholas Bellinger case PRO_REGISTER_AND_MOVE: 415c66ac9dbSNicholas Bellinger case PRO_RESERVE: 416c66ac9dbSNicholas Bellinger ret = 1; 417c66ac9dbSNicholas Bellinger break; 418c66ac9dbSNicholas Bellinger case PRO_RELEASE: 419c66ac9dbSNicholas Bellinger ret = (registered_nexus) ? 0 : 1; 420c66ac9dbSNicholas Bellinger break; 421c66ac9dbSNicholas Bellinger default: 4226708bb27SAndy Grover pr_err("Unknown PERSISTENT_RESERVE_OUT service" 423c66ac9dbSNicholas Bellinger " action: 0x%02x\n", cdb[1] & 0x1f); 424e3d6f909SAndy Grover return -EINVAL; 425c66ac9dbSNicholas Bellinger } 426c66ac9dbSNicholas Bellinger break; 427c66ac9dbSNicholas Bellinger case RELEASE: 428c66ac9dbSNicholas Bellinger case RELEASE_10: 429eacac00cSChristoph Hellwig /* Handled by CRH=1 in target_scsi2_reservation_release() */ 430c66ac9dbSNicholas Bellinger ret = 0; 431c66ac9dbSNicholas Bellinger break; 432c66ac9dbSNicholas Bellinger case RESERVE: 433c66ac9dbSNicholas Bellinger case RESERVE_10: 434eacac00cSChristoph Hellwig /* Handled by CRH=1 in target_scsi2_reservation_reserve() */ 435c66ac9dbSNicholas Bellinger ret = 0; 436c66ac9dbSNicholas Bellinger break; 437c66ac9dbSNicholas Bellinger case TEST_UNIT_READY: 438c66ac9dbSNicholas Bellinger ret = (legacy) ? 1 : 0; /* Conflict for legacy */ 439c66ac9dbSNicholas Bellinger break; 440c66ac9dbSNicholas Bellinger case MAINTENANCE_IN: 441c66ac9dbSNicholas Bellinger switch (cdb[1] & 0x1f) { 442c66ac9dbSNicholas Bellinger case MI_MANAGEMENT_PROTOCOL_IN: 443c66ac9dbSNicholas Bellinger if (registered_nexus) { 444c66ac9dbSNicholas Bellinger ret = 0; 445c66ac9dbSNicholas Bellinger break; 446c66ac9dbSNicholas Bellinger } 447c66ac9dbSNicholas Bellinger ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ 448c66ac9dbSNicholas Bellinger break; 449c66ac9dbSNicholas Bellinger case MI_REPORT_SUPPORTED_OPERATION_CODES: 450c66ac9dbSNicholas Bellinger case MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS: 451c66ac9dbSNicholas Bellinger if (legacy) { 452c66ac9dbSNicholas Bellinger ret = 1; 453c66ac9dbSNicholas Bellinger break; 454c66ac9dbSNicholas Bellinger } 455c66ac9dbSNicholas Bellinger if (registered_nexus) { 456c66ac9dbSNicholas Bellinger ret = 0; 457c66ac9dbSNicholas Bellinger break; 458c66ac9dbSNicholas Bellinger } 459c66ac9dbSNicholas Bellinger ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ 460c66ac9dbSNicholas Bellinger break; 461c66ac9dbSNicholas Bellinger case MI_REPORT_ALIASES: 462c66ac9dbSNicholas Bellinger case MI_REPORT_IDENTIFYING_INFORMATION: 463c66ac9dbSNicholas Bellinger case MI_REPORT_PRIORITY: 464c66ac9dbSNicholas Bellinger case MI_REPORT_TARGET_PGS: 465c66ac9dbSNicholas Bellinger case MI_REPORT_TIMESTAMP: 466c66ac9dbSNicholas Bellinger ret = 0; /* Allowed */ 467c66ac9dbSNicholas Bellinger break; 468c66ac9dbSNicholas Bellinger default: 4696708bb27SAndy Grover pr_err("Unknown MI Service Action: 0x%02x\n", 470c66ac9dbSNicholas Bellinger (cdb[1] & 0x1f)); 471e3d6f909SAndy Grover return -EINVAL; 472c66ac9dbSNicholas Bellinger } 473c66ac9dbSNicholas Bellinger break; 474c66ac9dbSNicholas Bellinger case ACCESS_CONTROL_IN: 475c66ac9dbSNicholas Bellinger case ACCESS_CONTROL_OUT: 476c66ac9dbSNicholas Bellinger case INQUIRY: 477c66ac9dbSNicholas Bellinger case LOG_SENSE: 47885686f69SHannes Reinecke case SERVICE_ACTION_IN_12: 479c66ac9dbSNicholas Bellinger case REPORT_LUNS: 480c66ac9dbSNicholas Bellinger case REQUEST_SENSE: 4816816966aSMarco Sanvido case PERSISTENT_RESERVE_IN: 482c66ac9dbSNicholas Bellinger ret = 0; /*/ Allowed CDBs */ 483c66ac9dbSNicholas Bellinger break; 484c66ac9dbSNicholas Bellinger default: 485c66ac9dbSNicholas Bellinger other_cdb = 1; 486c66ac9dbSNicholas Bellinger break; 487c66ac9dbSNicholas Bellinger } 488c66ac9dbSNicholas Bellinger /* 48925985edcSLucas De Marchi * Case where the CDB is explicitly allowed in the above switch 490c66ac9dbSNicholas Bellinger * statement. 491c66ac9dbSNicholas Bellinger */ 4926708bb27SAndy Grover if (!ret && !other_cdb) { 493125d0119SHannes Reinecke pr_debug("Allowing explicit CDB: 0x%02x for %s" 494c66ac9dbSNicholas Bellinger " reservation holder\n", cdb[0], 495c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 4968b1e1244SAndy Grover 497c66ac9dbSNicholas Bellinger return ret; 498c66ac9dbSNicholas Bellinger } 499c66ac9dbSNicholas Bellinger /* 500c66ac9dbSNicholas Bellinger * Check if write exclusive initiator ports *NOT* holding the 501c66ac9dbSNicholas Bellinger * WRITE_EXCLUSIVE_* reservation. 502c66ac9dbSNicholas Bellinger */ 503ee1b1b9cSAndy Grover if (we && !registered_nexus) { 504c66ac9dbSNicholas Bellinger if (cmd->data_direction == DMA_TO_DEVICE) { 505c66ac9dbSNicholas Bellinger /* 506c66ac9dbSNicholas Bellinger * Conflict for write exclusive 507c66ac9dbSNicholas Bellinger */ 5086708bb27SAndy Grover pr_debug("%s Conflict for unregistered nexus" 509c66ac9dbSNicholas Bellinger " %s CDB: 0x%02x to %s reservation\n", 510c66ac9dbSNicholas Bellinger transport_dump_cmd_direction(cmd), 511c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, cdb[0], 512c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 513c66ac9dbSNicholas Bellinger return 1; 514c66ac9dbSNicholas Bellinger } else { 515c66ac9dbSNicholas Bellinger /* 516c66ac9dbSNicholas Bellinger * Allow non WRITE CDBs for all Write Exclusive 517c66ac9dbSNicholas Bellinger * PR TYPEs to pass for registered and 518c66ac9dbSNicholas Bellinger * non-registered_nexuxes NOT holding the reservation. 519c66ac9dbSNicholas Bellinger * 520c66ac9dbSNicholas Bellinger * We only make noise for the unregisterd nexuses, 521c66ac9dbSNicholas Bellinger * as we expect registered non-reservation holding 522c66ac9dbSNicholas Bellinger * nexuses to issue CDBs. 523c66ac9dbSNicholas Bellinger */ 5248b1e1244SAndy Grover 5256708bb27SAndy Grover if (!registered_nexus) { 526125d0119SHannes Reinecke pr_debug("Allowing implicit CDB: 0x%02x" 527c66ac9dbSNicholas Bellinger " for %s reservation on unregistered" 528c66ac9dbSNicholas Bellinger " nexus\n", cdb[0], 529c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 530c66ac9dbSNicholas Bellinger } 5318b1e1244SAndy Grover 532c66ac9dbSNicholas Bellinger return 0; 533c66ac9dbSNicholas Bellinger } 534c66ac9dbSNicholas Bellinger } else if ((reg_only) || (all_reg)) { 535c66ac9dbSNicholas Bellinger if (registered_nexus) { 536c66ac9dbSNicholas Bellinger /* 537c66ac9dbSNicholas Bellinger * For PR_*_REG_ONLY and PR_*_ALL_REG reservations, 538c66ac9dbSNicholas Bellinger * allow commands from registered nexuses. 539c66ac9dbSNicholas Bellinger */ 5408b1e1244SAndy Grover 541125d0119SHannes Reinecke pr_debug("Allowing implicit CDB: 0x%02x for %s" 542c66ac9dbSNicholas Bellinger " reservation\n", cdb[0], 543c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 5448b1e1244SAndy Grover 545c66ac9dbSNicholas Bellinger return 0; 546c66ac9dbSNicholas Bellinger } 5471ecc7586SLee Duncan } else if (we && registered_nexus) { 5481ecc7586SLee Duncan /* 5491ecc7586SLee Duncan * Reads are allowed for Write Exclusive locks 5501ecc7586SLee Duncan * from all registrants. 5511ecc7586SLee Duncan */ 5521ecc7586SLee Duncan if (cmd->data_direction == DMA_FROM_DEVICE) { 5531ecc7586SLee Duncan pr_debug("Allowing READ CDB: 0x%02x for %s" 5541ecc7586SLee Duncan " reservation\n", cdb[0], 5551ecc7586SLee Duncan core_scsi3_pr_dump_type(pr_reg_type)); 5561ecc7586SLee Duncan 5571ecc7586SLee Duncan return 0; 5581ecc7586SLee Duncan } 559c66ac9dbSNicholas Bellinger } 5606708bb27SAndy Grover pr_debug("%s Conflict for %sregistered nexus %s CDB: 0x%2x" 561c66ac9dbSNicholas Bellinger " for %s reservation\n", transport_dump_cmd_direction(cmd), 562c66ac9dbSNicholas Bellinger (registered_nexus) ? "" : "un", 563c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, cdb[0], 564c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 565c66ac9dbSNicholas Bellinger 566c66ac9dbSNicholas Bellinger return 1; /* Conflict by default */ 567c66ac9dbSNicholas Bellinger } 568c66ac9dbSNicholas Bellinger 569de103c93SChristoph Hellwig static sense_reason_t 570de103c93SChristoph Hellwig target_scsi3_pr_reservation_check(struct se_cmd *cmd) 571d977f437SChristoph Hellwig { 572d977f437SChristoph Hellwig struct se_device *dev = cmd->se_dev; 573d977f437SChristoph Hellwig struct se_session *sess = cmd->se_sess; 574d977f437SChristoph Hellwig u32 pr_reg_type; 575d977f437SChristoph Hellwig 576d977f437SChristoph Hellwig if (!dev->dev_pr_res_holder) 577d977f437SChristoph Hellwig return 0; 578d977f437SChristoph Hellwig 579d977f437SChristoph Hellwig pr_reg_type = dev->dev_pr_res_holder->pr_res_type; 580d977f437SChristoph Hellwig cmd->pr_res_key = dev->dev_pr_res_holder->pr_res_key; 581d977f437SChristoph Hellwig if (dev->dev_pr_res_holder->pr_reg_nacl != sess->se_node_acl) 582d977f437SChristoph Hellwig goto check_nonholder; 583d977f437SChristoph Hellwig 584d977f437SChristoph Hellwig if (dev->dev_pr_res_holder->isid_present_at_reg) { 585d977f437SChristoph Hellwig if (dev->dev_pr_res_holder->pr_reg_bin_isid != 586d977f437SChristoph Hellwig sess->sess_bin_isid) { 587d977f437SChristoph Hellwig pr_reg_type |= 0x80000000; 588d977f437SChristoph Hellwig goto check_nonholder; 589d977f437SChristoph Hellwig } 590d977f437SChristoph Hellwig } 591d977f437SChristoph Hellwig 592d977f437SChristoph Hellwig return 0; 593d977f437SChristoph Hellwig 594d977f437SChristoph Hellwig check_nonholder: 595d977f437SChristoph Hellwig if (core_scsi3_pr_seq_non_holder(cmd, pr_reg_type)) 596de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 597d977f437SChristoph Hellwig return 0; 598d977f437SChristoph Hellwig } 599d977f437SChristoph Hellwig 600c66ac9dbSNicholas Bellinger static u32 core_scsi3_pr_generation(struct se_device *dev) 601c66ac9dbSNicholas Bellinger { 602c66ac9dbSNicholas Bellinger u32 prg; 6030fd97ccfSChristoph Hellwig 604c66ac9dbSNicholas Bellinger /* 605c66ac9dbSNicholas Bellinger * PRGeneration field shall contain the value of a 32-bit wrapping 606c66ac9dbSNicholas Bellinger * counter mainted by the device server. 607c66ac9dbSNicholas Bellinger * 608c66ac9dbSNicholas Bellinger * Note that this is done regardless of Active Persist across 609c66ac9dbSNicholas Bellinger * Target PowerLoss (APTPL) 610c66ac9dbSNicholas Bellinger * 611c66ac9dbSNicholas Bellinger * See spc4r17 section 6.3.12 READ_KEYS service action 612c66ac9dbSNicholas Bellinger */ 613c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 6140fd97ccfSChristoph Hellwig prg = dev->t10_pr.pr_generation++; 615c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 616c66ac9dbSNicholas Bellinger 617c66ac9dbSNicholas Bellinger return prg; 618c66ac9dbSNicholas Bellinger } 619c66ac9dbSNicholas Bellinger 620c66ac9dbSNicholas Bellinger static struct t10_pr_registration *__core_scsi3_do_alloc_registration( 621c66ac9dbSNicholas Bellinger struct se_device *dev, 622c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 623c66ac9dbSNicholas Bellinger struct se_dev_entry *deve, 624c66ac9dbSNicholas Bellinger unsigned char *isid, 625c66ac9dbSNicholas Bellinger u64 sa_res_key, 626c66ac9dbSNicholas Bellinger int all_tg_pt, 627c66ac9dbSNicholas Bellinger int aptpl) 628c66ac9dbSNicholas Bellinger { 629c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 630c66ac9dbSNicholas Bellinger 631c66ac9dbSNicholas Bellinger pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_ATOMIC); 6326708bb27SAndy Grover if (!pr_reg) { 6336708bb27SAndy Grover pr_err("Unable to allocate struct t10_pr_registration\n"); 634c66ac9dbSNicholas Bellinger return NULL; 635c66ac9dbSNicholas Bellinger } 636c66ac9dbSNicholas Bellinger 637c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_list); 638c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list); 639c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list); 640c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list); 641c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list); 642c66ac9dbSNicholas Bellinger atomic_set(&pr_reg->pr_res_holders, 0); 643c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = nacl; 644c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve = deve; 645c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun = deve->mapped_lun; 646c66ac9dbSNicholas Bellinger pr_reg->pr_aptpl_target_lun = deve->se_lun->unpacked_lun; 647c66ac9dbSNicholas Bellinger pr_reg->pr_res_key = sa_res_key; 648c66ac9dbSNicholas Bellinger pr_reg->pr_reg_all_tg_pt = all_tg_pt; 649c66ac9dbSNicholas Bellinger pr_reg->pr_reg_aptpl = aptpl; 650c66ac9dbSNicholas Bellinger pr_reg->pr_reg_tg_pt_lun = deve->se_lun; 651c66ac9dbSNicholas Bellinger /* 652c66ac9dbSNicholas Bellinger * If an ISID value for this SCSI Initiator Port exists, 653c66ac9dbSNicholas Bellinger * save it to the registration now. 654c66ac9dbSNicholas Bellinger */ 655c66ac9dbSNicholas Bellinger if (isid != NULL) { 656c66ac9dbSNicholas Bellinger pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid); 657c66ac9dbSNicholas Bellinger snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid); 658c66ac9dbSNicholas Bellinger pr_reg->isid_present_at_reg = 1; 659c66ac9dbSNicholas Bellinger } 660c66ac9dbSNicholas Bellinger 661c66ac9dbSNicholas Bellinger return pr_reg; 662c66ac9dbSNicholas Bellinger } 663c66ac9dbSNicholas Bellinger 664c66ac9dbSNicholas Bellinger static int core_scsi3_lunacl_depend_item(struct se_dev_entry *); 665c66ac9dbSNicholas Bellinger static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *); 666c66ac9dbSNicholas Bellinger 667c66ac9dbSNicholas Bellinger /* 668c66ac9dbSNicholas Bellinger * Function used for handling PR registrations for ALL_TG_PT=1 and ALL_TG_PT=0 669c66ac9dbSNicholas Bellinger * modes. 670c66ac9dbSNicholas Bellinger */ 671c66ac9dbSNicholas Bellinger static struct t10_pr_registration *__core_scsi3_alloc_registration( 672c66ac9dbSNicholas Bellinger struct se_device *dev, 673c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 674c66ac9dbSNicholas Bellinger struct se_dev_entry *deve, 675c66ac9dbSNicholas Bellinger unsigned char *isid, 676c66ac9dbSNicholas Bellinger u64 sa_res_key, 677c66ac9dbSNicholas Bellinger int all_tg_pt, 678c66ac9dbSNicholas Bellinger int aptpl) 679c66ac9dbSNicholas Bellinger { 680c66ac9dbSNicholas Bellinger struct se_dev_entry *deve_tmp; 681c66ac9dbSNicholas Bellinger struct se_node_acl *nacl_tmp; 682c66ac9dbSNicholas Bellinger struct se_port *port, *port_tmp; 6839ac8928eSChristoph Hellwig const struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; 684c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_atp, *pr_reg_tmp, *pr_reg_tmp_safe; 685c66ac9dbSNicholas Bellinger int ret; 686c66ac9dbSNicholas Bellinger /* 687c66ac9dbSNicholas Bellinger * Create a registration for the I_T Nexus upon which the 688c66ac9dbSNicholas Bellinger * PROUT REGISTER was received. 689c66ac9dbSNicholas Bellinger */ 690c66ac9dbSNicholas Bellinger pr_reg = __core_scsi3_do_alloc_registration(dev, nacl, deve, isid, 691c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl); 6926708bb27SAndy Grover if (!pr_reg) 693c66ac9dbSNicholas Bellinger return NULL; 694c66ac9dbSNicholas Bellinger /* 695c66ac9dbSNicholas Bellinger * Return pointer to pr_reg for ALL_TG_PT=0 696c66ac9dbSNicholas Bellinger */ 6976708bb27SAndy Grover if (!all_tg_pt) 698c66ac9dbSNicholas Bellinger return pr_reg; 699c66ac9dbSNicholas Bellinger /* 700c66ac9dbSNicholas Bellinger * Create list of matching SCSI Initiator Port registrations 701c66ac9dbSNicholas Bellinger * for ALL_TG_PT=1 702c66ac9dbSNicholas Bellinger */ 703c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 704c66ac9dbSNicholas Bellinger list_for_each_entry_safe(port, port_tmp, &dev->dev_sep_list, sep_list) { 70533940d09SJoern Engel atomic_inc_mb(&port->sep_tg_pt_ref_cnt); 706c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 707c66ac9dbSNicholas Bellinger 708c66ac9dbSNicholas Bellinger spin_lock_bh(&port->sep_alua_lock); 709c66ac9dbSNicholas Bellinger list_for_each_entry(deve_tmp, &port->sep_alua_list, 710c66ac9dbSNicholas Bellinger alua_port_list) { 711c66ac9dbSNicholas Bellinger /* 712c66ac9dbSNicholas Bellinger * This pointer will be NULL for demo mode MappedLUNs 713125d0119SHannes Reinecke * that have not been make explicit via a ConfigFS 714c66ac9dbSNicholas Bellinger * MappedLUN group for the SCSI Initiator Node ACL. 715c66ac9dbSNicholas Bellinger */ 7166708bb27SAndy Grover if (!deve_tmp->se_lun_acl) 717c66ac9dbSNicholas Bellinger continue; 718c66ac9dbSNicholas Bellinger 719c66ac9dbSNicholas Bellinger nacl_tmp = deve_tmp->se_lun_acl->se_lun_nacl; 720c66ac9dbSNicholas Bellinger /* 721c66ac9dbSNicholas Bellinger * Skip the matching struct se_node_acl that is allocated 722c66ac9dbSNicholas Bellinger * above.. 723c66ac9dbSNicholas Bellinger */ 724c66ac9dbSNicholas Bellinger if (nacl == nacl_tmp) 725c66ac9dbSNicholas Bellinger continue; 726c66ac9dbSNicholas Bellinger /* 727c66ac9dbSNicholas Bellinger * Only perform PR registrations for target ports on 728c66ac9dbSNicholas Bellinger * the same fabric module as the REGISTER w/ ALL_TG_PT=1 729c66ac9dbSNicholas Bellinger * arrived. 730c66ac9dbSNicholas Bellinger */ 731c66ac9dbSNicholas Bellinger if (tfo != nacl_tmp->se_tpg->se_tpg_tfo) 732c66ac9dbSNicholas Bellinger continue; 733c66ac9dbSNicholas Bellinger /* 734c66ac9dbSNicholas Bellinger * Look for a matching Initiator Node ACL in ASCII format 735c66ac9dbSNicholas Bellinger */ 736c66ac9dbSNicholas Bellinger if (strcmp(nacl->initiatorname, nacl_tmp->initiatorname)) 737c66ac9dbSNicholas Bellinger continue; 738c66ac9dbSNicholas Bellinger 73933940d09SJoern Engel atomic_inc_mb(&deve_tmp->pr_ref_count); 740c66ac9dbSNicholas Bellinger spin_unlock_bh(&port->sep_alua_lock); 741c66ac9dbSNicholas Bellinger /* 742c66ac9dbSNicholas Bellinger * Grab a configfs group dependency that is released 743c66ac9dbSNicholas Bellinger * for the exception path at label out: below, or upon 744c66ac9dbSNicholas Bellinger * completion of adding ALL_TG_PT=1 registrations in 745c66ac9dbSNicholas Bellinger * __core_scsi3_add_registration() 746c66ac9dbSNicholas Bellinger */ 747c66ac9dbSNicholas Bellinger ret = core_scsi3_lunacl_depend_item(deve_tmp); 748c66ac9dbSNicholas Bellinger if (ret < 0) { 7496708bb27SAndy Grover pr_err("core_scsi3_lunacl_depend" 750c66ac9dbSNicholas Bellinger "_item() failed\n"); 75133940d09SJoern Engel atomic_dec_mb(&port->sep_tg_pt_ref_cnt); 75233940d09SJoern Engel atomic_dec_mb(&deve_tmp->pr_ref_count); 753c66ac9dbSNicholas Bellinger goto out; 754c66ac9dbSNicholas Bellinger } 755c66ac9dbSNicholas Bellinger /* 756c66ac9dbSNicholas Bellinger * Located a matching SCSI Initiator Port on a different 757c66ac9dbSNicholas Bellinger * port, allocate the pr_reg_atp and attach it to the 758c66ac9dbSNicholas Bellinger * pr_reg->pr_reg_atp_list that will be processed once 759c66ac9dbSNicholas Bellinger * the original *pr_reg is processed in 760c66ac9dbSNicholas Bellinger * __core_scsi3_add_registration() 761c66ac9dbSNicholas Bellinger */ 762c66ac9dbSNicholas Bellinger pr_reg_atp = __core_scsi3_do_alloc_registration(dev, 763c66ac9dbSNicholas Bellinger nacl_tmp, deve_tmp, NULL, 764c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl); 7656708bb27SAndy Grover if (!pr_reg_atp) { 76633940d09SJoern Engel atomic_dec_mb(&port->sep_tg_pt_ref_cnt); 76733940d09SJoern Engel atomic_dec_mb(&deve_tmp->pr_ref_count); 768c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(deve_tmp); 769c66ac9dbSNicholas Bellinger goto out; 770c66ac9dbSNicholas Bellinger } 771c66ac9dbSNicholas Bellinger 772c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg_atp->pr_reg_atp_mem_list, 773c66ac9dbSNicholas Bellinger &pr_reg->pr_reg_atp_list); 774c66ac9dbSNicholas Bellinger spin_lock_bh(&port->sep_alua_lock); 775c66ac9dbSNicholas Bellinger } 776c66ac9dbSNicholas Bellinger spin_unlock_bh(&port->sep_alua_lock); 777c66ac9dbSNicholas Bellinger 778c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 77933940d09SJoern Engel atomic_dec_mb(&port->sep_tg_pt_ref_cnt); 780c66ac9dbSNicholas Bellinger } 781c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 782c66ac9dbSNicholas Bellinger 783c66ac9dbSNicholas Bellinger return pr_reg; 784c66ac9dbSNicholas Bellinger out: 785c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, 786c66ac9dbSNicholas Bellinger &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) { 787c66ac9dbSNicholas Bellinger list_del(&pr_reg_tmp->pr_reg_atp_mem_list); 788c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); 789c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp); 790c66ac9dbSNicholas Bellinger } 791c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 792c66ac9dbSNicholas Bellinger return NULL; 793c66ac9dbSNicholas Bellinger } 794c66ac9dbSNicholas Bellinger 795c66ac9dbSNicholas Bellinger int core_scsi3_alloc_aptpl_registration( 796e3d6f909SAndy Grover struct t10_reservation *pr_tmpl, 797c66ac9dbSNicholas Bellinger u64 sa_res_key, 798c66ac9dbSNicholas Bellinger unsigned char *i_port, 799c66ac9dbSNicholas Bellinger unsigned char *isid, 800c66ac9dbSNicholas Bellinger u32 mapped_lun, 801c66ac9dbSNicholas Bellinger unsigned char *t_port, 802c66ac9dbSNicholas Bellinger u16 tpgt, 803c66ac9dbSNicholas Bellinger u32 target_lun, 804c66ac9dbSNicholas Bellinger int res_holder, 805c66ac9dbSNicholas Bellinger int all_tg_pt, 806c66ac9dbSNicholas Bellinger u8 type) 807c66ac9dbSNicholas Bellinger { 808c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 809c66ac9dbSNicholas Bellinger 8106708bb27SAndy Grover if (!i_port || !t_port || !sa_res_key) { 8116708bb27SAndy Grover pr_err("Illegal parameters for APTPL registration\n"); 812e3d6f909SAndy Grover return -EINVAL; 813c66ac9dbSNicholas Bellinger } 814c66ac9dbSNicholas Bellinger 815c66ac9dbSNicholas Bellinger pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_KERNEL); 8166708bb27SAndy Grover if (!pr_reg) { 8176708bb27SAndy Grover pr_err("Unable to allocate struct t10_pr_registration\n"); 818e3d6f909SAndy Grover return -ENOMEM; 819c66ac9dbSNicholas Bellinger } 820c66ac9dbSNicholas Bellinger 821c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_list); 822c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list); 823c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list); 824c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list); 825c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list); 826c66ac9dbSNicholas Bellinger atomic_set(&pr_reg->pr_res_holders, 0); 827c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = NULL; 828c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve = NULL; 829c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun = mapped_lun; 830c66ac9dbSNicholas Bellinger pr_reg->pr_aptpl_target_lun = target_lun; 831c66ac9dbSNicholas Bellinger pr_reg->pr_res_key = sa_res_key; 832c66ac9dbSNicholas Bellinger pr_reg->pr_reg_all_tg_pt = all_tg_pt; 833c66ac9dbSNicholas Bellinger pr_reg->pr_reg_aptpl = 1; 834c66ac9dbSNicholas Bellinger pr_reg->pr_reg_tg_pt_lun = NULL; 835c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope = 0; /* Always LUN_SCOPE */ 836c66ac9dbSNicholas Bellinger pr_reg->pr_res_type = type; 837c66ac9dbSNicholas Bellinger /* 838c66ac9dbSNicholas Bellinger * If an ISID value had been saved in APTPL metadata for this 839c66ac9dbSNicholas Bellinger * SCSI Initiator Port, restore it now. 840c66ac9dbSNicholas Bellinger */ 841c66ac9dbSNicholas Bellinger if (isid != NULL) { 842c66ac9dbSNicholas Bellinger pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid); 843c66ac9dbSNicholas Bellinger snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid); 844c66ac9dbSNicholas Bellinger pr_reg->isid_present_at_reg = 1; 845c66ac9dbSNicholas Bellinger } 846c66ac9dbSNicholas Bellinger /* 847c66ac9dbSNicholas Bellinger * Copy the i_port and t_port information from caller. 848c66ac9dbSNicholas Bellinger */ 849c66ac9dbSNicholas Bellinger snprintf(pr_reg->pr_iport, PR_APTPL_MAX_IPORT_LEN, "%s", i_port); 850c66ac9dbSNicholas Bellinger snprintf(pr_reg->pr_tport, PR_APTPL_MAX_TPORT_LEN, "%s", t_port); 851c66ac9dbSNicholas Bellinger pr_reg->pr_reg_tpgt = tpgt; 852c66ac9dbSNicholas Bellinger /* 853c66ac9dbSNicholas Bellinger * Set pr_res_holder from caller, the pr_reg who is the reservation 854c66ac9dbSNicholas Bellinger * holder will get it's pointer set in core_scsi3_aptpl_reserve() once 855c66ac9dbSNicholas Bellinger * the Initiator Node LUN ACL from the fabric module is created for 856c66ac9dbSNicholas Bellinger * this registration. 857c66ac9dbSNicholas Bellinger */ 858c66ac9dbSNicholas Bellinger pr_reg->pr_res_holder = res_holder; 859c66ac9dbSNicholas Bellinger 860c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg->pr_reg_aptpl_list, &pr_tmpl->aptpl_reg_list); 8616708bb27SAndy Grover pr_debug("SPC-3 PR APTPL Successfully added registration%s from" 862c66ac9dbSNicholas Bellinger " metadata\n", (res_holder) ? "+reservation" : ""); 863c66ac9dbSNicholas Bellinger return 0; 864c66ac9dbSNicholas Bellinger } 865c66ac9dbSNicholas Bellinger 866c66ac9dbSNicholas Bellinger static void core_scsi3_aptpl_reserve( 867c66ac9dbSNicholas Bellinger struct se_device *dev, 868c66ac9dbSNicholas Bellinger struct se_portal_group *tpg, 869c66ac9dbSNicholas Bellinger struct se_node_acl *node_acl, 870c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg) 871c66ac9dbSNicholas Bellinger { 872c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 873c66ac9dbSNicholas Bellinger 874c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 875d2843c17SAndy Grover core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 876c66ac9dbSNicholas Bellinger 877c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 878c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = pr_reg; 879c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 880c66ac9dbSNicholas Bellinger 8816708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: APTPL RESERVE created" 882c66ac9dbSNicholas Bellinger " new reservation holder TYPE: %s ALL_TG_PT: %d\n", 883e3d6f909SAndy Grover tpg->se_tpg_tfo->get_fabric_name(), 884c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg->pr_res_type), 885c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); 8866708bb27SAndy Grover pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n", 887e3d6f909SAndy Grover tpg->se_tpg_tfo->get_fabric_name(), node_acl->initiatorname, 888d2843c17SAndy Grover i_buf); 889c66ac9dbSNicholas Bellinger } 890c66ac9dbSNicholas Bellinger 891c66ac9dbSNicholas Bellinger static void __core_scsi3_add_registration(struct se_device *, struct se_node_acl *, 89233ce6a87SAndy Grover struct t10_pr_registration *, enum register_type, int); 893c66ac9dbSNicholas Bellinger 894c66ac9dbSNicholas Bellinger static int __core_scsi3_check_aptpl_registration( 895c66ac9dbSNicholas Bellinger struct se_device *dev, 896c66ac9dbSNicholas Bellinger struct se_portal_group *tpg, 897c66ac9dbSNicholas Bellinger struct se_lun *lun, 898c66ac9dbSNicholas Bellinger u32 target_lun, 899c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 900c66ac9dbSNicholas Bellinger struct se_dev_entry *deve) 901c66ac9dbSNicholas Bellinger { 902c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp; 9030fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 904c66ac9dbSNicholas Bellinger unsigned char i_port[PR_APTPL_MAX_IPORT_LEN]; 905c66ac9dbSNicholas Bellinger unsigned char t_port[PR_APTPL_MAX_TPORT_LEN]; 906c66ac9dbSNicholas Bellinger u16 tpgt; 907c66ac9dbSNicholas Bellinger 908c66ac9dbSNicholas Bellinger memset(i_port, 0, PR_APTPL_MAX_IPORT_LEN); 909c66ac9dbSNicholas Bellinger memset(t_port, 0, PR_APTPL_MAX_TPORT_LEN); 910c66ac9dbSNicholas Bellinger /* 911c66ac9dbSNicholas Bellinger * Copy Initiator Port information from struct se_node_acl 912c66ac9dbSNicholas Bellinger */ 913c66ac9dbSNicholas Bellinger snprintf(i_port, PR_APTPL_MAX_IPORT_LEN, "%s", nacl->initiatorname); 914c66ac9dbSNicholas Bellinger snprintf(t_port, PR_APTPL_MAX_TPORT_LEN, "%s", 915e3d6f909SAndy Grover tpg->se_tpg_tfo->tpg_get_wwn(tpg)); 916e3d6f909SAndy Grover tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); 917c66ac9dbSNicholas Bellinger /* 918c66ac9dbSNicholas Bellinger * Look for the matching registrations+reservation from those 919c66ac9dbSNicholas Bellinger * created from APTPL metadata. Note that multiple registrations 920c66ac9dbSNicholas Bellinger * may exist for fabrics that use ISIDs in their SCSI Initiator Port 921c66ac9dbSNicholas Bellinger * TransportIDs. 922c66ac9dbSNicholas Bellinger */ 923c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->aptpl_reg_lock); 924c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, 925c66ac9dbSNicholas Bellinger pr_reg_aptpl_list) { 92692404e60SNicholas Bellinger 9276708bb27SAndy Grover if (!strcmp(pr_reg->pr_iport, i_port) && 928c66ac9dbSNicholas Bellinger (pr_reg->pr_res_mapped_lun == deve->mapped_lun) && 929c66ac9dbSNicholas Bellinger !(strcmp(pr_reg->pr_tport, t_port)) && 930c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_tpgt == tpgt) && 931c66ac9dbSNicholas Bellinger (pr_reg->pr_aptpl_target_lun == target_lun)) { 932c66ac9dbSNicholas Bellinger 933c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = nacl; 934c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve = deve; 935c66ac9dbSNicholas Bellinger pr_reg->pr_reg_tg_pt_lun = lun; 936c66ac9dbSNicholas Bellinger 937c66ac9dbSNicholas Bellinger list_del(&pr_reg->pr_reg_aptpl_list); 938c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->aptpl_reg_lock); 939c66ac9dbSNicholas Bellinger /* 940c66ac9dbSNicholas Bellinger * At this point all of the pointers in *pr_reg will 941c66ac9dbSNicholas Bellinger * be setup, so go ahead and add the registration. 942c66ac9dbSNicholas Bellinger */ 943c66ac9dbSNicholas Bellinger 944c66ac9dbSNicholas Bellinger __core_scsi3_add_registration(dev, nacl, pr_reg, 0, 0); 945c66ac9dbSNicholas Bellinger /* 946c66ac9dbSNicholas Bellinger * If this registration is the reservation holder, 947c66ac9dbSNicholas Bellinger * make that happen now.. 948c66ac9dbSNicholas Bellinger */ 949c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_holder) 950c66ac9dbSNicholas Bellinger core_scsi3_aptpl_reserve(dev, tpg, 951c66ac9dbSNicholas Bellinger nacl, pr_reg); 952c66ac9dbSNicholas Bellinger /* 953c66ac9dbSNicholas Bellinger * Reenable pr_aptpl_active to accept new metadata 954c66ac9dbSNicholas Bellinger * updates once the SCSI device is active again.. 955c66ac9dbSNicholas Bellinger */ 956c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->aptpl_reg_lock); 957c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_active = 1; 958c66ac9dbSNicholas Bellinger } 959c66ac9dbSNicholas Bellinger } 960c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->aptpl_reg_lock); 961c66ac9dbSNicholas Bellinger 962c66ac9dbSNicholas Bellinger return 0; 963c66ac9dbSNicholas Bellinger } 964c66ac9dbSNicholas Bellinger 965c66ac9dbSNicholas Bellinger int core_scsi3_check_aptpl_registration( 966c66ac9dbSNicholas Bellinger struct se_device *dev, 967c66ac9dbSNicholas Bellinger struct se_portal_group *tpg, 968c66ac9dbSNicholas Bellinger struct se_lun *lun, 969e2480563SNicholas Bellinger struct se_node_acl *nacl, 970e2480563SNicholas Bellinger u32 mapped_lun) 971c66ac9dbSNicholas Bellinger { 972e2480563SNicholas Bellinger struct se_dev_entry *deve = nacl->device_list[mapped_lun]; 973c66ac9dbSNicholas Bellinger 974d977f437SChristoph Hellwig if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 975c66ac9dbSNicholas Bellinger return 0; 976c66ac9dbSNicholas Bellinger 977c66ac9dbSNicholas Bellinger return __core_scsi3_check_aptpl_registration(dev, tpg, lun, 978c66ac9dbSNicholas Bellinger lun->unpacked_lun, nacl, deve); 979c66ac9dbSNicholas Bellinger } 980c66ac9dbSNicholas Bellinger 981c66ac9dbSNicholas Bellinger static void __core_scsi3_dump_registration( 9829ac8928eSChristoph Hellwig const struct target_core_fabric_ops *tfo, 983c66ac9dbSNicholas Bellinger struct se_device *dev, 984c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 985c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 98633ce6a87SAndy Grover enum register_type register_type) 987c66ac9dbSNicholas Bellinger { 988c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg = nacl->se_tpg; 989c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 990c66ac9dbSNicholas Bellinger 991c66ac9dbSNicholas Bellinger memset(&i_buf[0], 0, PR_REG_ISID_ID_LEN); 992d2843c17SAndy Grover core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 993c66ac9dbSNicholas Bellinger 9946708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: REGISTER%s Initiator" 99533ce6a87SAndy Grover " Node: %s%s\n", tfo->get_fabric_name(), (register_type == REGISTER_AND_MOVE) ? 99633ce6a87SAndy Grover "_AND_MOVE" : (register_type == REGISTER_AND_IGNORE_EXISTING_KEY) ? 997c66ac9dbSNicholas Bellinger "_AND_IGNORE_EXISTING_KEY" : "", nacl->initiatorname, 998d2843c17SAndy Grover i_buf); 9996708bb27SAndy Grover pr_debug("SPC-3 PR [%s] registration on Target Port: %s,0x%04x\n", 1000c66ac9dbSNicholas Bellinger tfo->get_fabric_name(), tfo->tpg_get_wwn(se_tpg), 1001c66ac9dbSNicholas Bellinger tfo->tpg_get_tag(se_tpg)); 10026708bb27SAndy Grover pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target" 1003c66ac9dbSNicholas Bellinger " Port(s)\n", tfo->get_fabric_name(), 1004c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE", 1005e3d6f909SAndy Grover dev->transport->name); 10066708bb27SAndy Grover pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:" 1007c66ac9dbSNicholas Bellinger " 0x%08x APTPL: %d\n", tfo->get_fabric_name(), 1008c66ac9dbSNicholas Bellinger pr_reg->pr_res_key, pr_reg->pr_res_generation, 1009c66ac9dbSNicholas Bellinger pr_reg->pr_reg_aptpl); 1010c66ac9dbSNicholas Bellinger } 1011c66ac9dbSNicholas Bellinger 1012c66ac9dbSNicholas Bellinger /* 1013c66ac9dbSNicholas Bellinger * this function can be called with struct se_device->dev_reservation_lock 1014c66ac9dbSNicholas Bellinger * when register_move = 1 1015c66ac9dbSNicholas Bellinger */ 1016c66ac9dbSNicholas Bellinger static void __core_scsi3_add_registration( 1017c66ac9dbSNicholas Bellinger struct se_device *dev, 1018c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 1019c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 102033ce6a87SAndy Grover enum register_type register_type, 1021c66ac9dbSNicholas Bellinger int register_move) 1022c66ac9dbSNicholas Bellinger { 10239ac8928eSChristoph Hellwig const struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; 1024c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe; 10250fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 1026c66ac9dbSNicholas Bellinger 1027c66ac9dbSNicholas Bellinger /* 1028c66ac9dbSNicholas Bellinger * Increment PRgeneration counter for struct se_device upon a successful 1029c66ac9dbSNicholas Bellinger * REGISTER, see spc4r17 section 6.3.2 READ_KEYS service action 1030c66ac9dbSNicholas Bellinger * 1031c66ac9dbSNicholas Bellinger * Also, when register_move = 1 for PROUT REGISTER_AND_MOVE service 1032c66ac9dbSNicholas Bellinger * action, the struct se_device->dev_reservation_lock will already be held, 1033c66ac9dbSNicholas Bellinger * so we do not call core_scsi3_pr_generation() which grabs the lock 1034c66ac9dbSNicholas Bellinger * for the REGISTER. 1035c66ac9dbSNicholas Bellinger */ 1036c66ac9dbSNicholas Bellinger pr_reg->pr_res_generation = (register_move) ? 10370fd97ccfSChristoph Hellwig dev->t10_pr.pr_generation++ : 1038c66ac9dbSNicholas Bellinger core_scsi3_pr_generation(dev); 1039c66ac9dbSNicholas Bellinger 1040c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1041c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg->pr_reg_list, &pr_tmpl->registration_list); 1042c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve->def_pr_registered = 1; 1043c66ac9dbSNicholas Bellinger 1044c66ac9dbSNicholas Bellinger __core_scsi3_dump_registration(tfo, dev, nacl, pr_reg, register_type); 1045c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1046c66ac9dbSNicholas Bellinger /* 1047c66ac9dbSNicholas Bellinger * Skip extra processing for ALL_TG_PT=0 or REGISTER_AND_MOVE. 1048c66ac9dbSNicholas Bellinger */ 10496708bb27SAndy Grover if (!pr_reg->pr_reg_all_tg_pt || register_move) 1050c66ac9dbSNicholas Bellinger return; 1051c66ac9dbSNicholas Bellinger /* 1052c66ac9dbSNicholas Bellinger * Walk pr_reg->pr_reg_atp_list and add registrations for ALL_TG_PT=1 1053c66ac9dbSNicholas Bellinger * allocated in __core_scsi3_alloc_registration() 1054c66ac9dbSNicholas Bellinger */ 1055c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, 1056c66ac9dbSNicholas Bellinger &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) { 1057c66ac9dbSNicholas Bellinger list_del(&pr_reg_tmp->pr_reg_atp_mem_list); 1058c66ac9dbSNicholas Bellinger 1059c66ac9dbSNicholas Bellinger pr_reg_tmp->pr_res_generation = core_scsi3_pr_generation(dev); 1060c66ac9dbSNicholas Bellinger 1061c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1062c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg_tmp->pr_reg_list, 1063c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list); 1064c66ac9dbSNicholas Bellinger pr_reg_tmp->pr_reg_deve->def_pr_registered = 1; 1065c66ac9dbSNicholas Bellinger 1066c66ac9dbSNicholas Bellinger __core_scsi3_dump_registration(tfo, dev, 1067c66ac9dbSNicholas Bellinger pr_reg_tmp->pr_reg_nacl, pr_reg_tmp, 1068c66ac9dbSNicholas Bellinger register_type); 1069c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1070c66ac9dbSNicholas Bellinger /* 1071c66ac9dbSNicholas Bellinger * Drop configfs group dependency reference from 1072c66ac9dbSNicholas Bellinger * __core_scsi3_alloc_registration() 1073c66ac9dbSNicholas Bellinger */ 1074c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); 1075c66ac9dbSNicholas Bellinger } 1076c66ac9dbSNicholas Bellinger } 1077c66ac9dbSNicholas Bellinger 1078c66ac9dbSNicholas Bellinger static int core_scsi3_alloc_registration( 1079c66ac9dbSNicholas Bellinger struct se_device *dev, 1080c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 1081c66ac9dbSNicholas Bellinger struct se_dev_entry *deve, 1082c66ac9dbSNicholas Bellinger unsigned char *isid, 1083c66ac9dbSNicholas Bellinger u64 sa_res_key, 1084c66ac9dbSNicholas Bellinger int all_tg_pt, 1085c66ac9dbSNicholas Bellinger int aptpl, 108633ce6a87SAndy Grover enum register_type register_type, 1087c66ac9dbSNicholas Bellinger int register_move) 1088c66ac9dbSNicholas Bellinger { 1089c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 1090c66ac9dbSNicholas Bellinger 1091c66ac9dbSNicholas Bellinger pr_reg = __core_scsi3_alloc_registration(dev, nacl, deve, isid, 1092c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl); 10936708bb27SAndy Grover if (!pr_reg) 1094e3d6f909SAndy Grover return -EPERM; 1095c66ac9dbSNicholas Bellinger 1096c66ac9dbSNicholas Bellinger __core_scsi3_add_registration(dev, nacl, pr_reg, 1097c66ac9dbSNicholas Bellinger register_type, register_move); 1098c66ac9dbSNicholas Bellinger return 0; 1099c66ac9dbSNicholas Bellinger } 1100c66ac9dbSNicholas Bellinger 1101c66ac9dbSNicholas Bellinger static struct t10_pr_registration *__core_scsi3_locate_pr_reg( 1102c66ac9dbSNicholas Bellinger struct se_device *dev, 1103c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 1104c66ac9dbSNicholas Bellinger unsigned char *isid) 1105c66ac9dbSNicholas Bellinger { 11060fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 1107c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp; 1108c66ac9dbSNicholas Bellinger struct se_portal_group *tpg; 1109c66ac9dbSNicholas Bellinger 1110c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1111c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 1112c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 1113c66ac9dbSNicholas Bellinger /* 1114c66ac9dbSNicholas Bellinger * First look for a matching struct se_node_acl 1115c66ac9dbSNicholas Bellinger */ 1116c66ac9dbSNicholas Bellinger if (pr_reg->pr_reg_nacl != nacl) 1117c66ac9dbSNicholas Bellinger continue; 1118c66ac9dbSNicholas Bellinger 1119c66ac9dbSNicholas Bellinger tpg = pr_reg->pr_reg_nacl->se_tpg; 1120c66ac9dbSNicholas Bellinger /* 1121c66ac9dbSNicholas Bellinger * If this registration does NOT contain a fabric provided 1122c66ac9dbSNicholas Bellinger * ISID, then we have found a match. 1123c66ac9dbSNicholas Bellinger */ 11246708bb27SAndy Grover if (!pr_reg->isid_present_at_reg) { 1125c66ac9dbSNicholas Bellinger /* 1126c66ac9dbSNicholas Bellinger * Determine if this SCSI device server requires that 1127c66ac9dbSNicholas Bellinger * SCSI Intiatior TransportID w/ ISIDs is enforced 1128c66ac9dbSNicholas Bellinger * for fabric modules (iSCSI) requiring them. 1129c66ac9dbSNicholas Bellinger */ 1130e3d6f909SAndy Grover if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { 11310fd97ccfSChristoph Hellwig if (dev->dev_attrib.enforce_pr_isids) 1132c66ac9dbSNicholas Bellinger continue; 1133c66ac9dbSNicholas Bellinger } 113433940d09SJoern Engel atomic_inc_mb(&pr_reg->pr_res_holders); 1135c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1136c66ac9dbSNicholas Bellinger return pr_reg; 1137c66ac9dbSNicholas Bellinger } 1138c66ac9dbSNicholas Bellinger /* 1139c66ac9dbSNicholas Bellinger * If the *pr_reg contains a fabric defined ISID for multi-value 1140c66ac9dbSNicholas Bellinger * SCSI Initiator Port TransportIDs, then we expect a valid 1141c66ac9dbSNicholas Bellinger * matching ISID to be provided by the local SCSI Initiator Port. 1142c66ac9dbSNicholas Bellinger */ 11436708bb27SAndy Grover if (!isid) 1144c66ac9dbSNicholas Bellinger continue; 1145c66ac9dbSNicholas Bellinger if (strcmp(isid, pr_reg->pr_reg_isid)) 1146c66ac9dbSNicholas Bellinger continue; 1147c66ac9dbSNicholas Bellinger 114833940d09SJoern Engel atomic_inc_mb(&pr_reg->pr_res_holders); 1149c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1150c66ac9dbSNicholas Bellinger return pr_reg; 1151c66ac9dbSNicholas Bellinger } 1152c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1153c66ac9dbSNicholas Bellinger 1154c66ac9dbSNicholas Bellinger return NULL; 1155c66ac9dbSNicholas Bellinger } 1156c66ac9dbSNicholas Bellinger 1157c66ac9dbSNicholas Bellinger static struct t10_pr_registration *core_scsi3_locate_pr_reg( 1158c66ac9dbSNicholas Bellinger struct se_device *dev, 1159c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 1160c66ac9dbSNicholas Bellinger struct se_session *sess) 1161c66ac9dbSNicholas Bellinger { 1162c66ac9dbSNicholas Bellinger struct se_portal_group *tpg = nacl->se_tpg; 1163c66ac9dbSNicholas Bellinger unsigned char buf[PR_REG_ISID_LEN], *isid_ptr = NULL; 1164c66ac9dbSNicholas Bellinger 1165e3d6f909SAndy Grover if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { 1166c66ac9dbSNicholas Bellinger memset(&buf[0], 0, PR_REG_ISID_LEN); 1167e3d6f909SAndy Grover tpg->se_tpg_tfo->sess_get_initiator_sid(sess, &buf[0], 1168c66ac9dbSNicholas Bellinger PR_REG_ISID_LEN); 1169c66ac9dbSNicholas Bellinger isid_ptr = &buf[0]; 1170c66ac9dbSNicholas Bellinger } 1171c66ac9dbSNicholas Bellinger 1172c66ac9dbSNicholas Bellinger return __core_scsi3_locate_pr_reg(dev, nacl, isid_ptr); 1173c66ac9dbSNicholas Bellinger } 1174c66ac9dbSNicholas Bellinger 1175c66ac9dbSNicholas Bellinger static void core_scsi3_put_pr_reg(struct t10_pr_registration *pr_reg) 1176c66ac9dbSNicholas Bellinger { 117733940d09SJoern Engel atomic_dec_mb(&pr_reg->pr_res_holders); 1178c66ac9dbSNicholas Bellinger } 1179c66ac9dbSNicholas Bellinger 1180125d0119SHannes Reinecke static int core_scsi3_check_implicit_release( 1181c66ac9dbSNicholas Bellinger struct se_device *dev, 1182c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg) 1183c66ac9dbSNicholas Bellinger { 1184c66ac9dbSNicholas Bellinger struct se_node_acl *nacl = pr_reg->pr_reg_nacl; 1185c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_res_holder; 1186c66ac9dbSNicholas Bellinger int ret = 0; 1187c66ac9dbSNicholas Bellinger 1188c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 1189c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 11906708bb27SAndy Grover if (!pr_res_holder) { 1191c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1192c66ac9dbSNicholas Bellinger return ret; 1193c66ac9dbSNicholas Bellinger } 1194c66ac9dbSNicholas Bellinger if (pr_res_holder == pr_reg) { 1195c66ac9dbSNicholas Bellinger /* 1196125d0119SHannes Reinecke * Perform an implicit RELEASE if the registration that 1197c66ac9dbSNicholas Bellinger * is being released is holding the reservation. 1198c66ac9dbSNicholas Bellinger * 1199c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.11.1: 1200c66ac9dbSNicholas Bellinger * 1201c66ac9dbSNicholas Bellinger * e) If the I_T nexus is the persistent reservation holder 1202c66ac9dbSNicholas Bellinger * and the persistent reservation is not an all registrants 1203c66ac9dbSNicholas Bellinger * type, then a PERSISTENT RESERVE OUT command with REGISTER 1204c66ac9dbSNicholas Bellinger * service action or REGISTER AND IGNORE EXISTING KEY 1205c66ac9dbSNicholas Bellinger * service action with the SERVICE ACTION RESERVATION KEY 1206c66ac9dbSNicholas Bellinger * field set to zero (see 5.7.11.3). 1207c66ac9dbSNicholas Bellinger */ 12086c3c9baaSNicholas Bellinger __core_scsi3_complete_pro_release(dev, nacl, pr_reg, 0, 1); 1209c66ac9dbSNicholas Bellinger ret = 1; 1210c66ac9dbSNicholas Bellinger /* 1211c66ac9dbSNicholas Bellinger * For 'All Registrants' reservation types, all existing 1212c66ac9dbSNicholas Bellinger * registrations are still processed as reservation holders 1213c66ac9dbSNicholas Bellinger * in core_scsi3_pr_seq_non_holder() after the initial 1214125d0119SHannes Reinecke * reservation holder is implicitly released here. 1215c66ac9dbSNicholas Bellinger */ 1216c66ac9dbSNicholas Bellinger } else if (pr_reg->pr_reg_all_tg_pt && 1217c66ac9dbSNicholas Bellinger (!strcmp(pr_res_holder->pr_reg_nacl->initiatorname, 1218c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->initiatorname)) && 1219c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_key == pr_reg->pr_res_key)) { 12206708bb27SAndy Grover pr_err("SPC-3 PR: Unable to perform ALL_TG_PT=1" 1221c66ac9dbSNicholas Bellinger " UNREGISTER while existing reservation with matching" 1222c66ac9dbSNicholas Bellinger " key 0x%016Lx is present from another SCSI Initiator" 1223c66ac9dbSNicholas Bellinger " Port\n", pr_reg->pr_res_key); 1224e3d6f909SAndy Grover ret = -EPERM; 1225c66ac9dbSNicholas Bellinger } 1226c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1227c66ac9dbSNicholas Bellinger 1228c66ac9dbSNicholas Bellinger return ret; 1229c66ac9dbSNicholas Bellinger } 1230c66ac9dbSNicholas Bellinger 1231c66ac9dbSNicholas Bellinger /* 1232e3d6f909SAndy Grover * Called with struct t10_reservation->registration_lock held. 1233c66ac9dbSNicholas Bellinger */ 1234c66ac9dbSNicholas Bellinger static void __core_scsi3_free_registration( 1235c66ac9dbSNicholas Bellinger struct se_device *dev, 1236c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 1237c66ac9dbSNicholas Bellinger struct list_head *preempt_and_abort_list, 1238c66ac9dbSNicholas Bellinger int dec_holders) 1239c66ac9dbSNicholas Bellinger { 12409ac8928eSChristoph Hellwig const struct target_core_fabric_ops *tfo = 1241c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 12420fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 1243c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 1244c66ac9dbSNicholas Bellinger 1245c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1246d2843c17SAndy Grover core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1247c66ac9dbSNicholas Bellinger 1248c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve->def_pr_registered = 0; 1249c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve->pr_res_key = 0; 12506c3c9baaSNicholas Bellinger if (!list_empty(&pr_reg->pr_reg_list)) 1251c66ac9dbSNicholas Bellinger list_del(&pr_reg->pr_reg_list); 1252c66ac9dbSNicholas Bellinger /* 1253c66ac9dbSNicholas Bellinger * Caller accessing *pr_reg using core_scsi3_locate_pr_reg(), 1254c66ac9dbSNicholas Bellinger * so call core_scsi3_put_pr_reg() to decrement our reference. 1255c66ac9dbSNicholas Bellinger */ 1256c66ac9dbSNicholas Bellinger if (dec_holders) 1257c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 1258c66ac9dbSNicholas Bellinger /* 1259c66ac9dbSNicholas Bellinger * Wait until all reference from any other I_T nexuses for this 1260c66ac9dbSNicholas Bellinger * *pr_reg have been released. Because list_del() is called above, 1261c66ac9dbSNicholas Bellinger * the last core_scsi3_put_pr_reg(pr_reg) will release this reference 1262c66ac9dbSNicholas Bellinger * count back to zero, and we release *pr_reg. 1263c66ac9dbSNicholas Bellinger */ 1264c66ac9dbSNicholas Bellinger while (atomic_read(&pr_reg->pr_res_holders) != 0) { 1265c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 12666708bb27SAndy Grover pr_debug("SPC-3 PR [%s] waiting for pr_res_holders\n", 1267c66ac9dbSNicholas Bellinger tfo->get_fabric_name()); 1268c66ac9dbSNicholas Bellinger cpu_relax(); 1269c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1270c66ac9dbSNicholas Bellinger } 1271c66ac9dbSNicholas Bellinger 12726708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: UNREGISTER Initiator" 1273c66ac9dbSNicholas Bellinger " Node: %s%s\n", tfo->get_fabric_name(), 1274c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->initiatorname, 1275d2843c17SAndy Grover i_buf); 12766708bb27SAndy Grover pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target" 1277c66ac9dbSNicholas Bellinger " Port(s)\n", tfo->get_fabric_name(), 1278c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE", 1279e3d6f909SAndy Grover dev->transport->name); 12806708bb27SAndy Grover pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:" 1281c66ac9dbSNicholas Bellinger " 0x%08x\n", tfo->get_fabric_name(), pr_reg->pr_res_key, 1282c66ac9dbSNicholas Bellinger pr_reg->pr_res_generation); 1283c66ac9dbSNicholas Bellinger 12846708bb27SAndy Grover if (!preempt_and_abort_list) { 1285c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve = NULL; 1286c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = NULL; 1287c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 1288c66ac9dbSNicholas Bellinger return; 1289c66ac9dbSNicholas Bellinger } 1290c66ac9dbSNicholas Bellinger /* 1291c66ac9dbSNicholas Bellinger * For PREEMPT_AND_ABORT, the list of *pr_reg in preempt_and_abort_list 1292c66ac9dbSNicholas Bellinger * are released once the ABORT_TASK_SET has completed.. 1293c66ac9dbSNicholas Bellinger */ 1294c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg->pr_reg_abort_list, preempt_and_abort_list); 1295c66ac9dbSNicholas Bellinger } 1296c66ac9dbSNicholas Bellinger 1297c66ac9dbSNicholas Bellinger void core_scsi3_free_pr_reg_from_nacl( 1298c66ac9dbSNicholas Bellinger struct se_device *dev, 1299c66ac9dbSNicholas Bellinger struct se_node_acl *nacl) 1300c66ac9dbSNicholas Bellinger { 13010fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 1302c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder; 13036c3c9baaSNicholas Bellinger bool free_reg = false; 1304c66ac9dbSNicholas Bellinger /* 1305c66ac9dbSNicholas Bellinger * If the passed se_node_acl matches the reservation holder, 1306c66ac9dbSNicholas Bellinger * release the reservation. 1307c66ac9dbSNicholas Bellinger */ 1308c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 1309c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 1310c66ac9dbSNicholas Bellinger if ((pr_res_holder != NULL) && 13116c3c9baaSNicholas Bellinger (pr_res_holder->pr_reg_nacl == nacl)) { 13126c3c9baaSNicholas Bellinger __core_scsi3_complete_pro_release(dev, nacl, pr_res_holder, 0, 1); 13136c3c9baaSNicholas Bellinger free_reg = true; 13146c3c9baaSNicholas Bellinger } 1315c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1316c66ac9dbSNicholas Bellinger /* 1317c66ac9dbSNicholas Bellinger * Release any registration associated with the struct se_node_acl. 1318c66ac9dbSNicholas Bellinger */ 1319c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 13206c3c9baaSNicholas Bellinger if (pr_res_holder && free_reg) 13216c3c9baaSNicholas Bellinger __core_scsi3_free_registration(dev, pr_res_holder, NULL, 0); 13226c3c9baaSNicholas Bellinger 1323c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 1324c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 1325c66ac9dbSNicholas Bellinger 1326c66ac9dbSNicholas Bellinger if (pr_reg->pr_reg_nacl != nacl) 1327c66ac9dbSNicholas Bellinger continue; 1328c66ac9dbSNicholas Bellinger 1329c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, NULL, 0); 1330c66ac9dbSNicholas Bellinger } 1331c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1332c66ac9dbSNicholas Bellinger } 1333c66ac9dbSNicholas Bellinger 1334c66ac9dbSNicholas Bellinger void core_scsi3_free_all_registrations( 1335c66ac9dbSNicholas Bellinger struct se_device *dev) 1336c66ac9dbSNicholas Bellinger { 13370fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 1338c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder; 1339c66ac9dbSNicholas Bellinger 1340c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 1341c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 1342c66ac9dbSNicholas Bellinger if (pr_res_holder != NULL) { 1343c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 1344c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, pr_res_nacl, 13456c3c9baaSNicholas Bellinger pr_res_holder, 0, 0); 1346c66ac9dbSNicholas Bellinger } 1347c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1348c66ac9dbSNicholas Bellinger 1349c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1350c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 1351c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 1352c66ac9dbSNicholas Bellinger 1353c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, NULL, 0); 1354c66ac9dbSNicholas Bellinger } 1355c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1356c66ac9dbSNicholas Bellinger 1357c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->aptpl_reg_lock); 1358c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, 1359c66ac9dbSNicholas Bellinger pr_reg_aptpl_list) { 1360c66ac9dbSNicholas Bellinger list_del(&pr_reg->pr_reg_aptpl_list); 1361c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 1362c66ac9dbSNicholas Bellinger } 1363c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->aptpl_reg_lock); 1364c66ac9dbSNicholas Bellinger } 1365c66ac9dbSNicholas Bellinger 1366c66ac9dbSNicholas Bellinger static int core_scsi3_tpg_depend_item(struct se_portal_group *tpg) 1367c66ac9dbSNicholas Bellinger { 1368e3d6f909SAndy Grover return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys, 1369c66ac9dbSNicholas Bellinger &tpg->tpg_group.cg_item); 1370c66ac9dbSNicholas Bellinger } 1371c66ac9dbSNicholas Bellinger 1372c66ac9dbSNicholas Bellinger static void core_scsi3_tpg_undepend_item(struct se_portal_group *tpg) 1373c66ac9dbSNicholas Bellinger { 1374e3d6f909SAndy Grover configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys, 1375c66ac9dbSNicholas Bellinger &tpg->tpg_group.cg_item); 1376c66ac9dbSNicholas Bellinger 137733940d09SJoern Engel atomic_dec_mb(&tpg->tpg_pr_ref_count); 1378c66ac9dbSNicholas Bellinger } 1379c66ac9dbSNicholas Bellinger 1380c66ac9dbSNicholas Bellinger static int core_scsi3_nodeacl_depend_item(struct se_node_acl *nacl) 1381c66ac9dbSNicholas Bellinger { 1382c66ac9dbSNicholas Bellinger struct se_portal_group *tpg = nacl->se_tpg; 1383c66ac9dbSNicholas Bellinger 1384c66ac9dbSNicholas Bellinger if (nacl->dynamic_node_acl) 1385c66ac9dbSNicholas Bellinger return 0; 1386c66ac9dbSNicholas Bellinger 1387e3d6f909SAndy Grover return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys, 1388c66ac9dbSNicholas Bellinger &nacl->acl_group.cg_item); 1389c66ac9dbSNicholas Bellinger } 1390c66ac9dbSNicholas Bellinger 1391c66ac9dbSNicholas Bellinger static void core_scsi3_nodeacl_undepend_item(struct se_node_acl *nacl) 1392c66ac9dbSNicholas Bellinger { 1393c66ac9dbSNicholas Bellinger struct se_portal_group *tpg = nacl->se_tpg; 1394c66ac9dbSNicholas Bellinger 1395c66ac9dbSNicholas Bellinger if (nacl->dynamic_node_acl) { 139633940d09SJoern Engel atomic_dec_mb(&nacl->acl_pr_ref_count); 1397c66ac9dbSNicholas Bellinger return; 1398c66ac9dbSNicholas Bellinger } 1399c66ac9dbSNicholas Bellinger 1400e3d6f909SAndy Grover configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys, 1401c66ac9dbSNicholas Bellinger &nacl->acl_group.cg_item); 1402c66ac9dbSNicholas Bellinger 140333940d09SJoern Engel atomic_dec_mb(&nacl->acl_pr_ref_count); 1404c66ac9dbSNicholas Bellinger } 1405c66ac9dbSNicholas Bellinger 1406c66ac9dbSNicholas Bellinger static int core_scsi3_lunacl_depend_item(struct se_dev_entry *se_deve) 1407c66ac9dbSNicholas Bellinger { 1408c66ac9dbSNicholas Bellinger struct se_lun_acl *lun_acl = se_deve->se_lun_acl; 1409c66ac9dbSNicholas Bellinger struct se_node_acl *nacl; 1410c66ac9dbSNicholas Bellinger struct se_portal_group *tpg; 1411c66ac9dbSNicholas Bellinger /* 1412c66ac9dbSNicholas Bellinger * For nacl->dynamic_node_acl=1 1413c66ac9dbSNicholas Bellinger */ 14146708bb27SAndy Grover if (!lun_acl) 1415c66ac9dbSNicholas Bellinger return 0; 1416c66ac9dbSNicholas Bellinger 1417c66ac9dbSNicholas Bellinger nacl = lun_acl->se_lun_nacl; 1418c66ac9dbSNicholas Bellinger tpg = nacl->se_tpg; 1419c66ac9dbSNicholas Bellinger 1420e3d6f909SAndy Grover return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys, 1421c66ac9dbSNicholas Bellinger &lun_acl->se_lun_group.cg_item); 1422c66ac9dbSNicholas Bellinger } 1423c66ac9dbSNicholas Bellinger 1424c66ac9dbSNicholas Bellinger static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *se_deve) 1425c66ac9dbSNicholas Bellinger { 1426c66ac9dbSNicholas Bellinger struct se_lun_acl *lun_acl = se_deve->se_lun_acl; 1427c66ac9dbSNicholas Bellinger struct se_node_acl *nacl; 1428c66ac9dbSNicholas Bellinger struct se_portal_group *tpg; 1429c66ac9dbSNicholas Bellinger /* 1430c66ac9dbSNicholas Bellinger * For nacl->dynamic_node_acl=1 1431c66ac9dbSNicholas Bellinger */ 14326708bb27SAndy Grover if (!lun_acl) { 143333940d09SJoern Engel atomic_dec_mb(&se_deve->pr_ref_count); 1434c66ac9dbSNicholas Bellinger return; 1435c66ac9dbSNicholas Bellinger } 1436c66ac9dbSNicholas Bellinger nacl = lun_acl->se_lun_nacl; 1437c66ac9dbSNicholas Bellinger tpg = nacl->se_tpg; 1438c66ac9dbSNicholas Bellinger 1439e3d6f909SAndy Grover configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys, 1440c66ac9dbSNicholas Bellinger &lun_acl->se_lun_group.cg_item); 1441c66ac9dbSNicholas Bellinger 144233940d09SJoern Engel atomic_dec_mb(&se_deve->pr_ref_count); 1443c66ac9dbSNicholas Bellinger } 1444c66ac9dbSNicholas Bellinger 1445de103c93SChristoph Hellwig static sense_reason_t 1446de103c93SChristoph Hellwig core_scsi3_decode_spec_i_port( 1447c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 1448c66ac9dbSNicholas Bellinger struct se_portal_group *tpg, 1449c66ac9dbSNicholas Bellinger unsigned char *l_isid, 1450c66ac9dbSNicholas Bellinger u64 sa_res_key, 1451c66ac9dbSNicholas Bellinger int all_tg_pt, 1452c66ac9dbSNicholas Bellinger int aptpl) 1453c66ac9dbSNicholas Bellinger { 14545951146dSAndy Grover struct se_device *dev = cmd->se_dev; 1455c66ac9dbSNicholas Bellinger struct se_port *tmp_port; 1456c66ac9dbSNicholas Bellinger struct se_portal_group *dest_tpg = NULL, *tmp_tpg; 1457e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 1458c66ac9dbSNicholas Bellinger struct se_node_acl *dest_node_acl = NULL; 1459c66ac9dbSNicholas Bellinger struct se_dev_entry *dest_se_deve = NULL, *local_se_deve; 1460c66ac9dbSNicholas Bellinger struct t10_pr_registration *dest_pr_reg, *local_pr_reg, *pr_reg_e; 1461c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe; 1462d0f474e5SRoland Dreier LIST_HEAD(tid_dest_list); 1463c66ac9dbSNicholas Bellinger struct pr_transport_id_holder *tidh_new, *tidh, *tidh_tmp; 14649ac8928eSChristoph Hellwig const struct target_core_fabric_ops *tmp_tf_ops; 146505d1c7c0SAndy Grover unsigned char *buf; 1466c66ac9dbSNicholas Bellinger unsigned char *ptr, *i_str = NULL, proto_ident, tmp_proto_ident; 146713ba564cSJulia Lawall char *iport_ptr = NULL, i_buf[PR_REG_ISID_ID_LEN]; 1468de103c93SChristoph Hellwig sense_reason_t ret; 1469c66ac9dbSNicholas Bellinger u32 tpdl, tid_len = 0; 1470d2843c17SAndy Grover int dest_local_nexus; 1471c66ac9dbSNicholas Bellinger u32 dest_rtpi = 0; 1472c66ac9dbSNicholas Bellinger 1473f2083241SJörn Engel local_se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; 1474c66ac9dbSNicholas Bellinger /* 1475c66ac9dbSNicholas Bellinger * Allocate a struct pr_transport_id_holder and setup the 1476c66ac9dbSNicholas Bellinger * local_node_acl and local_se_deve pointers and add to 1477c66ac9dbSNicholas Bellinger * struct list_head tid_dest_list for add registration 1478c66ac9dbSNicholas Bellinger * processing in the loop of tid_dest_list below. 1479c66ac9dbSNicholas Bellinger */ 1480c66ac9dbSNicholas Bellinger tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), GFP_KERNEL); 14816708bb27SAndy Grover if (!tidh_new) { 14826708bb27SAndy Grover pr_err("Unable to allocate tidh_new\n"); 1483de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1484c66ac9dbSNicholas Bellinger } 1485c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&tidh_new->dest_list); 1486c66ac9dbSNicholas Bellinger tidh_new->dest_tpg = tpg; 1487c66ac9dbSNicholas Bellinger tidh_new->dest_node_acl = se_sess->se_node_acl; 1488c66ac9dbSNicholas Bellinger tidh_new->dest_se_deve = local_se_deve; 1489c66ac9dbSNicholas Bellinger 14905951146dSAndy Grover local_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev, 1491c66ac9dbSNicholas Bellinger se_sess->se_node_acl, local_se_deve, l_isid, 1492c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl); 14936708bb27SAndy Grover if (!local_pr_reg) { 1494c66ac9dbSNicholas Bellinger kfree(tidh_new); 1495de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1496c66ac9dbSNicholas Bellinger } 1497c66ac9dbSNicholas Bellinger tidh_new->dest_pr_reg = local_pr_reg; 1498c66ac9dbSNicholas Bellinger /* 1499c66ac9dbSNicholas Bellinger * The local I_T nexus does not hold any configfs dependances, 1500c66ac9dbSNicholas Bellinger * so we set tid_h->dest_local_nexus=1 to prevent the 1501c66ac9dbSNicholas Bellinger * configfs_undepend_item() calls in the tid_dest_list loops below. 1502c66ac9dbSNicholas Bellinger */ 1503c66ac9dbSNicholas Bellinger tidh_new->dest_local_nexus = 1; 1504c66ac9dbSNicholas Bellinger list_add_tail(&tidh_new->dest_list, &tid_dest_list); 150505d1c7c0SAndy Grover 15060d7f1299SPaolo Bonzini if (cmd->data_length < 28) { 15070d7f1299SPaolo Bonzini pr_warn("SPC-PR: Received PR OUT parameter list" 15080d7f1299SPaolo Bonzini " length too small: %u\n", cmd->data_length); 1509de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 15100d7f1299SPaolo Bonzini goto out; 15110d7f1299SPaolo Bonzini } 15120d7f1299SPaolo Bonzini 15134949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 1514de103c93SChristoph Hellwig if (!buf) { 1515de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1516de103c93SChristoph Hellwig goto out; 1517de103c93SChristoph Hellwig } 1518de103c93SChristoph Hellwig 1519c66ac9dbSNicholas Bellinger /* 1520c66ac9dbSNicholas Bellinger * For a PERSISTENT RESERVE OUT specify initiator ports payload, 1521c66ac9dbSNicholas Bellinger * first extract TransportID Parameter Data Length, and make sure 1522c66ac9dbSNicholas Bellinger * the value matches up to the SCSI expected data transfer length. 1523c66ac9dbSNicholas Bellinger */ 1524c66ac9dbSNicholas Bellinger tpdl = (buf[24] & 0xff) << 24; 1525c66ac9dbSNicholas Bellinger tpdl |= (buf[25] & 0xff) << 16; 1526c66ac9dbSNicholas Bellinger tpdl |= (buf[26] & 0xff) << 8; 1527c66ac9dbSNicholas Bellinger tpdl |= buf[27] & 0xff; 1528c66ac9dbSNicholas Bellinger 1529c66ac9dbSNicholas Bellinger if ((tpdl + 28) != cmd->data_length) { 15306708bb27SAndy Grover pr_err("SPC-3 PR: Illegal tpdl: %u + 28 byte header" 1531c66ac9dbSNicholas Bellinger " does not equal CDB data_length: %u\n", tpdl, 1532c66ac9dbSNicholas Bellinger cmd->data_length); 1533de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 1534de103c93SChristoph Hellwig goto out_unmap; 1535c66ac9dbSNicholas Bellinger } 1536c66ac9dbSNicholas Bellinger /* 1537c66ac9dbSNicholas Bellinger * Start processing the received transport IDs using the 1538c66ac9dbSNicholas Bellinger * receiving I_T Nexus portal's fabric dependent methods to 1539c66ac9dbSNicholas Bellinger * obtain the SCSI Initiator Port/Device Identifiers. 1540c66ac9dbSNicholas Bellinger */ 1541c66ac9dbSNicholas Bellinger ptr = &buf[28]; 1542c66ac9dbSNicholas Bellinger 1543c66ac9dbSNicholas Bellinger while (tpdl > 0) { 1544c66ac9dbSNicholas Bellinger proto_ident = (ptr[0] & 0x0f); 1545c66ac9dbSNicholas Bellinger dest_tpg = NULL; 1546c66ac9dbSNicholas Bellinger 1547c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 1548c66ac9dbSNicholas Bellinger list_for_each_entry(tmp_port, &dev->dev_sep_list, sep_list) { 1549c66ac9dbSNicholas Bellinger tmp_tpg = tmp_port->sep_tpg; 15506708bb27SAndy Grover if (!tmp_tpg) 1551c66ac9dbSNicholas Bellinger continue; 1552e3d6f909SAndy Grover tmp_tf_ops = tmp_tpg->se_tpg_tfo; 15536708bb27SAndy Grover if (!tmp_tf_ops) 1554c66ac9dbSNicholas Bellinger continue; 15556708bb27SAndy Grover if (!tmp_tf_ops->get_fabric_proto_ident || 15566708bb27SAndy Grover !tmp_tf_ops->tpg_parse_pr_out_transport_id) 1557c66ac9dbSNicholas Bellinger continue; 1558c66ac9dbSNicholas Bellinger /* 1559c66ac9dbSNicholas Bellinger * Look for the matching proto_ident provided by 1560c66ac9dbSNicholas Bellinger * the received TransportID 1561c66ac9dbSNicholas Bellinger */ 1562c66ac9dbSNicholas Bellinger tmp_proto_ident = tmp_tf_ops->get_fabric_proto_ident(tmp_tpg); 1563c66ac9dbSNicholas Bellinger if (tmp_proto_ident != proto_ident) 1564c66ac9dbSNicholas Bellinger continue; 1565c66ac9dbSNicholas Bellinger dest_rtpi = tmp_port->sep_rtpi; 1566c66ac9dbSNicholas Bellinger 1567c66ac9dbSNicholas Bellinger i_str = tmp_tf_ops->tpg_parse_pr_out_transport_id( 1568c66ac9dbSNicholas Bellinger tmp_tpg, (const char *)ptr, &tid_len, 1569c66ac9dbSNicholas Bellinger &iport_ptr); 15706708bb27SAndy Grover if (!i_str) 1571c66ac9dbSNicholas Bellinger continue; 1572c66ac9dbSNicholas Bellinger 157333940d09SJoern Engel atomic_inc_mb(&tmp_tpg->tpg_pr_ref_count); 1574c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 1575c66ac9dbSNicholas Bellinger 1576de103c93SChristoph Hellwig if (core_scsi3_tpg_depend_item(tmp_tpg)) { 15776708bb27SAndy Grover pr_err(" core_scsi3_tpg_depend_item()" 1578c66ac9dbSNicholas Bellinger " for tmp_tpg\n"); 157933940d09SJoern Engel atomic_dec_mb(&tmp_tpg->tpg_pr_ref_count); 1580de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1581de103c93SChristoph Hellwig goto out_unmap; 1582c66ac9dbSNicholas Bellinger } 1583c66ac9dbSNicholas Bellinger /* 158435d1efe8SMasanari Iida * Locate the destination initiator ACL to be registered 1585c66ac9dbSNicholas Bellinger * from the decoded fabric module specific TransportID 1586c66ac9dbSNicholas Bellinger * at *i_str. 1587c66ac9dbSNicholas Bellinger */ 158828638887SRoland Dreier spin_lock_irq(&tmp_tpg->acl_node_lock); 1589c66ac9dbSNicholas Bellinger dest_node_acl = __core_tpg_get_initiator_node_acl( 1590c66ac9dbSNicholas Bellinger tmp_tpg, i_str); 159133940d09SJoern Engel if (dest_node_acl) 159233940d09SJoern Engel atomic_inc_mb(&dest_node_acl->acl_pr_ref_count); 159328638887SRoland Dreier spin_unlock_irq(&tmp_tpg->acl_node_lock); 1594c66ac9dbSNicholas Bellinger 15956708bb27SAndy Grover if (!dest_node_acl) { 1596c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(tmp_tpg); 1597c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 1598c66ac9dbSNicholas Bellinger continue; 1599c66ac9dbSNicholas Bellinger } 1600c66ac9dbSNicholas Bellinger 1601de103c93SChristoph Hellwig if (core_scsi3_nodeacl_depend_item(dest_node_acl)) { 16026708bb27SAndy Grover pr_err("configfs_depend_item() failed" 1603c66ac9dbSNicholas Bellinger " for dest_node_acl->acl_group\n"); 160433940d09SJoern Engel atomic_dec_mb(&dest_node_acl->acl_pr_ref_count); 1605c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(tmp_tpg); 1606de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1607de103c93SChristoph Hellwig goto out_unmap; 1608c66ac9dbSNicholas Bellinger } 1609c66ac9dbSNicholas Bellinger 1610c66ac9dbSNicholas Bellinger dest_tpg = tmp_tpg; 16116708bb27SAndy Grover pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node:" 1612c66ac9dbSNicholas Bellinger " %s Port RTPI: %hu\n", 1613e3d6f909SAndy Grover dest_tpg->se_tpg_tfo->get_fabric_name(), 1614c66ac9dbSNicholas Bellinger dest_node_acl->initiatorname, dest_rtpi); 1615c66ac9dbSNicholas Bellinger 1616c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 1617c66ac9dbSNicholas Bellinger break; 1618c66ac9dbSNicholas Bellinger } 1619c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 1620c66ac9dbSNicholas Bellinger 16216708bb27SAndy Grover if (!dest_tpg) { 16226708bb27SAndy Grover pr_err("SPC-3 PR SPEC_I_PT: Unable to locate" 1623c66ac9dbSNicholas Bellinger " dest_tpg\n"); 1624de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 1625de103c93SChristoph Hellwig goto out_unmap; 1626c66ac9dbSNicholas Bellinger } 16278b1e1244SAndy Grover 16286708bb27SAndy Grover pr_debug("SPC-3 PR SPEC_I_PT: Got %s data_length: %u tpdl: %u" 1629c66ac9dbSNicholas Bellinger " tid_len: %d for %s + %s\n", 1630e3d6f909SAndy Grover dest_tpg->se_tpg_tfo->get_fabric_name(), cmd->data_length, 1631c66ac9dbSNicholas Bellinger tpdl, tid_len, i_str, iport_ptr); 16328b1e1244SAndy Grover 1633c66ac9dbSNicholas Bellinger if (tid_len > tpdl) { 16346708bb27SAndy Grover pr_err("SPC-3 PR SPEC_I_PT: Illegal tid_len:" 1635c66ac9dbSNicholas Bellinger " %u for Transport ID: %s\n", tid_len, ptr); 1636c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1637c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1638de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 1639de103c93SChristoph Hellwig goto out_unmap; 1640c66ac9dbSNicholas Bellinger } 1641c66ac9dbSNicholas Bellinger /* 1642c66ac9dbSNicholas Bellinger * Locate the desintation struct se_dev_entry pointer for matching 1643c66ac9dbSNicholas Bellinger * RELATIVE TARGET PORT IDENTIFIER on the receiving I_T Nexus 1644c66ac9dbSNicholas Bellinger * Target Port. 1645c66ac9dbSNicholas Bellinger */ 1646c66ac9dbSNicholas Bellinger dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, 1647c66ac9dbSNicholas Bellinger dest_rtpi); 16486708bb27SAndy Grover if (!dest_se_deve) { 16496708bb27SAndy Grover pr_err("Unable to locate %s dest_se_deve" 1650c66ac9dbSNicholas Bellinger " from destination RTPI: %hu\n", 1651e3d6f909SAndy Grover dest_tpg->se_tpg_tfo->get_fabric_name(), 1652c66ac9dbSNicholas Bellinger dest_rtpi); 1653c66ac9dbSNicholas Bellinger 1654c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1655c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1656de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 1657de103c93SChristoph Hellwig goto out_unmap; 1658c66ac9dbSNicholas Bellinger } 1659c66ac9dbSNicholas Bellinger 1660de103c93SChristoph Hellwig if (core_scsi3_lunacl_depend_item(dest_se_deve)) { 16616708bb27SAndy Grover pr_err("core_scsi3_lunacl_depend_item()" 1662c66ac9dbSNicholas Bellinger " failed\n"); 166333940d09SJoern Engel atomic_dec_mb(&dest_se_deve->pr_ref_count); 1664c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1665c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1666de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1667de103c93SChristoph Hellwig goto out_unmap; 1668c66ac9dbSNicholas Bellinger } 16698b1e1244SAndy Grover 16706708bb27SAndy Grover pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node: %s" 1671c66ac9dbSNicholas Bellinger " dest_se_deve mapped_lun: %u\n", 1672e3d6f909SAndy Grover dest_tpg->se_tpg_tfo->get_fabric_name(), 1673c66ac9dbSNicholas Bellinger dest_node_acl->initiatorname, dest_se_deve->mapped_lun); 16748b1e1244SAndy Grover 1675c66ac9dbSNicholas Bellinger /* 1676c66ac9dbSNicholas Bellinger * Skip any TransportIDs that already have a registration for 1677c66ac9dbSNicholas Bellinger * this target port. 1678c66ac9dbSNicholas Bellinger */ 1679c66ac9dbSNicholas Bellinger pr_reg_e = __core_scsi3_locate_pr_reg(dev, dest_node_acl, 1680c66ac9dbSNicholas Bellinger iport_ptr); 1681c66ac9dbSNicholas Bellinger if (pr_reg_e) { 1682c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_e); 1683c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1684c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1685c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1686c66ac9dbSNicholas Bellinger ptr += tid_len; 1687c66ac9dbSNicholas Bellinger tpdl -= tid_len; 1688c66ac9dbSNicholas Bellinger tid_len = 0; 1689c66ac9dbSNicholas Bellinger continue; 1690c66ac9dbSNicholas Bellinger } 1691c66ac9dbSNicholas Bellinger /* 1692c66ac9dbSNicholas Bellinger * Allocate a struct pr_transport_id_holder and setup 1693c66ac9dbSNicholas Bellinger * the dest_node_acl and dest_se_deve pointers for the 1694c66ac9dbSNicholas Bellinger * loop below. 1695c66ac9dbSNicholas Bellinger */ 1696c66ac9dbSNicholas Bellinger tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), 1697c66ac9dbSNicholas Bellinger GFP_KERNEL); 16986708bb27SAndy Grover if (!tidh_new) { 16996708bb27SAndy Grover pr_err("Unable to allocate tidh_new\n"); 1700c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1701c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1702c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1703de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1704de103c93SChristoph Hellwig goto out_unmap; 1705c66ac9dbSNicholas Bellinger } 1706c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&tidh_new->dest_list); 1707c66ac9dbSNicholas Bellinger tidh_new->dest_tpg = dest_tpg; 1708c66ac9dbSNicholas Bellinger tidh_new->dest_node_acl = dest_node_acl; 1709c66ac9dbSNicholas Bellinger tidh_new->dest_se_deve = dest_se_deve; 1710c66ac9dbSNicholas Bellinger 1711c66ac9dbSNicholas Bellinger /* 1712c66ac9dbSNicholas Bellinger * Allocate, but do NOT add the registration for the 1713c66ac9dbSNicholas Bellinger * TransportID referenced SCSI Initiator port. This 1714c66ac9dbSNicholas Bellinger * done because of the following from spc4r17 in section 1715c66ac9dbSNicholas Bellinger * 6.14.3 wrt SPEC_I_PT: 1716c66ac9dbSNicholas Bellinger * 1717c66ac9dbSNicholas Bellinger * "If a registration fails for any initiator port (e.g., if th 1718c66ac9dbSNicholas Bellinger * logical unit does not have enough resources available to 1719c66ac9dbSNicholas Bellinger * hold the registration information), no registrations shall be 1720c66ac9dbSNicholas Bellinger * made, and the command shall be terminated with 1721c66ac9dbSNicholas Bellinger * CHECK CONDITION status." 1722c66ac9dbSNicholas Bellinger * 1723c66ac9dbSNicholas Bellinger * That means we call __core_scsi3_alloc_registration() here, 1724c66ac9dbSNicholas Bellinger * and then call __core_scsi3_add_registration() in the 1725c66ac9dbSNicholas Bellinger * 2nd loop which will never fail. 1726c66ac9dbSNicholas Bellinger */ 17275951146dSAndy Grover dest_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev, 1728c66ac9dbSNicholas Bellinger dest_node_acl, dest_se_deve, iport_ptr, 1729c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl); 17306708bb27SAndy Grover if (!dest_pr_reg) { 1731c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1732c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1733c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1734c66ac9dbSNicholas Bellinger kfree(tidh_new); 1735de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 1736de103c93SChristoph Hellwig goto out_unmap; 1737c66ac9dbSNicholas Bellinger } 1738c66ac9dbSNicholas Bellinger tidh_new->dest_pr_reg = dest_pr_reg; 1739c66ac9dbSNicholas Bellinger list_add_tail(&tidh_new->dest_list, &tid_dest_list); 1740c66ac9dbSNicholas Bellinger 1741c66ac9dbSNicholas Bellinger ptr += tid_len; 1742c66ac9dbSNicholas Bellinger tpdl -= tid_len; 1743c66ac9dbSNicholas Bellinger tid_len = 0; 1744c66ac9dbSNicholas Bellinger 1745c66ac9dbSNicholas Bellinger } 174605d1c7c0SAndy Grover 17474949314cSAndy Grover transport_kunmap_data_sg(cmd); 174805d1c7c0SAndy Grover 1749c66ac9dbSNicholas Bellinger /* 1750c66ac9dbSNicholas Bellinger * Go ahead and create a registrations from tid_dest_list for the 1751c66ac9dbSNicholas Bellinger * SPEC_I_PT provided TransportID for the *tidh referenced dest_node_acl 1752c66ac9dbSNicholas Bellinger * and dest_se_deve. 1753c66ac9dbSNicholas Bellinger * 1754c66ac9dbSNicholas Bellinger * The SA Reservation Key from the PROUT is set for the 1755c66ac9dbSNicholas Bellinger * registration, and ALL_TG_PT is also passed. ALL_TG_PT=1 1756c66ac9dbSNicholas Bellinger * means that the TransportID Initiator port will be 1757c66ac9dbSNicholas Bellinger * registered on all of the target ports in the SCSI target device 1758c66ac9dbSNicholas Bellinger * ALL_TG_PT=0 means the registration will only be for the 1759c66ac9dbSNicholas Bellinger * SCSI target port the PROUT REGISTER with SPEC_I_PT=1 1760c66ac9dbSNicholas Bellinger * was received. 1761c66ac9dbSNicholas Bellinger */ 1762c66ac9dbSNicholas Bellinger list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) { 1763c66ac9dbSNicholas Bellinger dest_tpg = tidh->dest_tpg; 1764c66ac9dbSNicholas Bellinger dest_node_acl = tidh->dest_node_acl; 1765c66ac9dbSNicholas Bellinger dest_se_deve = tidh->dest_se_deve; 1766c66ac9dbSNicholas Bellinger dest_pr_reg = tidh->dest_pr_reg; 1767c66ac9dbSNicholas Bellinger dest_local_nexus = tidh->dest_local_nexus; 1768c66ac9dbSNicholas Bellinger 1769c66ac9dbSNicholas Bellinger list_del(&tidh->dest_list); 1770c66ac9dbSNicholas Bellinger kfree(tidh); 1771c66ac9dbSNicholas Bellinger 1772c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1773d2843c17SAndy Grover core_pr_dump_initiator_port(dest_pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1774c66ac9dbSNicholas Bellinger 17755951146dSAndy Grover __core_scsi3_add_registration(cmd->se_dev, dest_node_acl, 1776c66ac9dbSNicholas Bellinger dest_pr_reg, 0, 0); 1777c66ac9dbSNicholas Bellinger 17786708bb27SAndy Grover pr_debug("SPC-3 PR [%s] SPEC_I_PT: Successfully" 1779c66ac9dbSNicholas Bellinger " registered Transport ID for Node: %s%s Mapped LUN:" 1780e3d6f909SAndy Grover " %u\n", dest_tpg->se_tpg_tfo->get_fabric_name(), 1781d2843c17SAndy Grover dest_node_acl->initiatorname, i_buf, dest_se_deve->mapped_lun); 1782c66ac9dbSNicholas Bellinger 1783c66ac9dbSNicholas Bellinger if (dest_local_nexus) 1784c66ac9dbSNicholas Bellinger continue; 1785c66ac9dbSNicholas Bellinger 1786c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1787c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1788c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1789c66ac9dbSNicholas Bellinger } 1790c66ac9dbSNicholas Bellinger 1791c66ac9dbSNicholas Bellinger return 0; 1792de103c93SChristoph Hellwig out_unmap: 17934949314cSAndy Grover transport_kunmap_data_sg(cmd); 1794de103c93SChristoph Hellwig out: 1795c66ac9dbSNicholas Bellinger /* 1796c66ac9dbSNicholas Bellinger * For the failure case, release everything from tid_dest_list 1797c66ac9dbSNicholas Bellinger * including *dest_pr_reg and the configfs dependances.. 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 dest_local_nexus = tidh->dest_local_nexus; 1805c66ac9dbSNicholas Bellinger 1806c66ac9dbSNicholas Bellinger list_del(&tidh->dest_list); 1807c66ac9dbSNicholas Bellinger kfree(tidh); 1808c66ac9dbSNicholas Bellinger /* 1809c66ac9dbSNicholas Bellinger * Release any extra ALL_TG_PT=1 registrations for 1810c66ac9dbSNicholas Bellinger * the SPEC_I_PT=1 case. 1811c66ac9dbSNicholas Bellinger */ 1812c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, 1813c66ac9dbSNicholas Bellinger &dest_pr_reg->pr_reg_atp_list, 1814c66ac9dbSNicholas Bellinger pr_reg_atp_mem_list) { 1815c66ac9dbSNicholas Bellinger list_del(&pr_reg_tmp->pr_reg_atp_mem_list); 1816c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); 1817c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp); 1818c66ac9dbSNicholas Bellinger } 1819c66ac9dbSNicholas Bellinger 1820c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, dest_pr_reg); 1821c66ac9dbSNicholas Bellinger 1822c66ac9dbSNicholas Bellinger if (dest_local_nexus) 1823c66ac9dbSNicholas Bellinger continue; 1824c66ac9dbSNicholas 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 return ret; 1830c66ac9dbSNicholas Bellinger } 1831c66ac9dbSNicholas Bellinger 18323c8a6228SAndy Grover static int core_scsi3_update_aptpl_buf( 1833c66ac9dbSNicholas Bellinger struct se_device *dev, 1834c66ac9dbSNicholas Bellinger unsigned char *buf, 18350607decdSAndy Grover u32 pr_aptpl_buf_len) 1836c66ac9dbSNicholas Bellinger { 1837c66ac9dbSNicholas Bellinger struct se_lun *lun; 1838c66ac9dbSNicholas Bellinger struct se_portal_group *tpg; 1839c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 1840c66ac9dbSNicholas Bellinger unsigned char tmp[512], isid_buf[32]; 1841c66ac9dbSNicholas Bellinger ssize_t len = 0; 1842c66ac9dbSNicholas Bellinger int reg_count = 0; 18433c8a6228SAndy Grover int ret = 0; 1844c66ac9dbSNicholas Bellinger 18453c8a6228SAndy Grover spin_lock(&dev->dev_reservation_lock); 18463c8a6228SAndy Grover spin_lock(&dev->t10_pr.registration_lock); 1847c66ac9dbSNicholas Bellinger /* 1848c66ac9dbSNicholas Bellinger * Walk the registration list.. 1849c66ac9dbSNicholas Bellinger */ 18500fd97ccfSChristoph Hellwig list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 1851c66ac9dbSNicholas Bellinger pr_reg_list) { 1852c66ac9dbSNicholas Bellinger 1853c66ac9dbSNicholas Bellinger tmp[0] = '\0'; 1854c66ac9dbSNicholas Bellinger isid_buf[0] = '\0'; 1855c66ac9dbSNicholas Bellinger tpg = pr_reg->pr_reg_nacl->se_tpg; 1856c66ac9dbSNicholas Bellinger lun = pr_reg->pr_reg_tg_pt_lun; 1857c66ac9dbSNicholas Bellinger /* 1858c66ac9dbSNicholas Bellinger * Write out any ISID value to APTPL metadata that was included 1859c66ac9dbSNicholas Bellinger * in the original registration. 1860c66ac9dbSNicholas Bellinger */ 1861c66ac9dbSNicholas Bellinger if (pr_reg->isid_present_at_reg) 1862c66ac9dbSNicholas Bellinger snprintf(isid_buf, 32, "initiator_sid=%s\n", 1863c66ac9dbSNicholas Bellinger pr_reg->pr_reg_isid); 1864c66ac9dbSNicholas Bellinger /* 1865c66ac9dbSNicholas Bellinger * Include special metadata if the pr_reg matches the 1866c66ac9dbSNicholas Bellinger * reservation holder. 1867c66ac9dbSNicholas Bellinger */ 1868c66ac9dbSNicholas Bellinger if (dev->dev_pr_res_holder == pr_reg) { 1869c66ac9dbSNicholas Bellinger snprintf(tmp, 512, "PR_REG_START: %d" 1870c66ac9dbSNicholas Bellinger "\ninitiator_fabric=%s\n" 1871c66ac9dbSNicholas Bellinger "initiator_node=%s\n%s" 1872c66ac9dbSNicholas Bellinger "sa_res_key=%llu\n" 1873c66ac9dbSNicholas Bellinger "res_holder=1\nres_type=%02x\n" 1874c66ac9dbSNicholas Bellinger "res_scope=%02x\nres_all_tg_pt=%d\n" 1875c66ac9dbSNicholas Bellinger "mapped_lun=%u\n", reg_count, 1876e3d6f909SAndy Grover tpg->se_tpg_tfo->get_fabric_name(), 1877c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->initiatorname, isid_buf, 1878c66ac9dbSNicholas Bellinger pr_reg->pr_res_key, pr_reg->pr_res_type, 1879c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope, pr_reg->pr_reg_all_tg_pt, 1880c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun); 1881c66ac9dbSNicholas Bellinger } else { 1882c66ac9dbSNicholas Bellinger snprintf(tmp, 512, "PR_REG_START: %d\n" 1883c66ac9dbSNicholas Bellinger "initiator_fabric=%s\ninitiator_node=%s\n%s" 1884c66ac9dbSNicholas Bellinger "sa_res_key=%llu\nres_holder=0\n" 1885c66ac9dbSNicholas Bellinger "res_all_tg_pt=%d\nmapped_lun=%u\n", 1886e3d6f909SAndy Grover reg_count, tpg->se_tpg_tfo->get_fabric_name(), 1887c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->initiatorname, isid_buf, 1888c66ac9dbSNicholas Bellinger pr_reg->pr_res_key, pr_reg->pr_reg_all_tg_pt, 1889c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun); 1890c66ac9dbSNicholas Bellinger } 1891c66ac9dbSNicholas Bellinger 189260d645a4SDan Carpenter if ((len + strlen(tmp) >= pr_aptpl_buf_len)) { 1893f161d4b4SNicholas Bellinger pr_err("Unable to update renaming APTPL metadata," 1894f161d4b4SNicholas Bellinger " reallocating larger buffer\n"); 18953c8a6228SAndy Grover ret = -EMSGSIZE; 18963c8a6228SAndy Grover goto out; 1897c66ac9dbSNicholas Bellinger } 1898c66ac9dbSNicholas Bellinger len += sprintf(buf+len, "%s", tmp); 1899c66ac9dbSNicholas Bellinger 1900c66ac9dbSNicholas Bellinger /* 1901c66ac9dbSNicholas Bellinger * Include information about the associated SCSI target port. 1902c66ac9dbSNicholas Bellinger */ 1903c66ac9dbSNicholas Bellinger snprintf(tmp, 512, "target_fabric=%s\ntarget_node=%s\n" 1904c66ac9dbSNicholas Bellinger "tpgt=%hu\nport_rtpi=%hu\ntarget_lun=%u\nPR_REG_END:" 1905e3d6f909SAndy Grover " %d\n", tpg->se_tpg_tfo->get_fabric_name(), 1906e3d6f909SAndy Grover tpg->se_tpg_tfo->tpg_get_wwn(tpg), 1907e3d6f909SAndy Grover tpg->se_tpg_tfo->tpg_get_tag(tpg), 1908c66ac9dbSNicholas Bellinger lun->lun_sep->sep_rtpi, lun->unpacked_lun, reg_count); 1909c66ac9dbSNicholas Bellinger 191060d645a4SDan Carpenter if ((len + strlen(tmp) >= pr_aptpl_buf_len)) { 1911f161d4b4SNicholas Bellinger pr_err("Unable to update renaming APTPL metadata," 1912f161d4b4SNicholas Bellinger " reallocating larger buffer\n"); 19133c8a6228SAndy Grover ret = -EMSGSIZE; 19143c8a6228SAndy Grover goto out; 1915c66ac9dbSNicholas Bellinger } 1916c66ac9dbSNicholas Bellinger len += sprintf(buf+len, "%s", tmp); 1917c66ac9dbSNicholas Bellinger reg_count++; 1918c66ac9dbSNicholas Bellinger } 1919c66ac9dbSNicholas Bellinger 19206708bb27SAndy Grover if (!reg_count) 1921c66ac9dbSNicholas Bellinger len += sprintf(buf+len, "No Registrations or Reservations"); 1922c66ac9dbSNicholas Bellinger 19233c8a6228SAndy Grover out: 19243c8a6228SAndy Grover spin_unlock(&dev->t10_pr.registration_lock); 1925c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1926c66ac9dbSNicholas Bellinger 1927c66ac9dbSNicholas Bellinger return ret; 1928c66ac9dbSNicholas Bellinger } 1929c66ac9dbSNicholas Bellinger 1930c66ac9dbSNicholas Bellinger static int __core_scsi3_write_aptpl_to_file( 1931c66ac9dbSNicholas Bellinger struct se_device *dev, 19324dee96fbSAndy Grover unsigned char *buf) 1933c66ac9dbSNicholas Bellinger { 19340fd97ccfSChristoph Hellwig struct t10_wwn *wwn = &dev->t10_wwn; 1935c66ac9dbSNicholas Bellinger struct file *file; 1936c66ac9dbSNicholas Bellinger int flags = O_RDWR | O_CREAT | O_TRUNC; 1937c66ac9dbSNicholas Bellinger char path[512]; 19384dee96fbSAndy Grover u32 pr_aptpl_buf_len; 1939c66ac9dbSNicholas Bellinger int ret; 1940c66ac9dbSNicholas Bellinger 1941c66ac9dbSNicholas Bellinger memset(path, 0, 512); 1942c66ac9dbSNicholas Bellinger 194360d645a4SDan Carpenter if (strlen(&wwn->unit_serial[0]) >= 512) { 19446708bb27SAndy Grover pr_err("WWN value for struct se_device does not fit" 1945c66ac9dbSNicholas Bellinger " into path buffer\n"); 1946e3d6f909SAndy Grover return -EMSGSIZE; 1947c66ac9dbSNicholas Bellinger } 1948c66ac9dbSNicholas Bellinger 1949c66ac9dbSNicholas Bellinger snprintf(path, 512, "/var/target/pr/aptpl_%s", &wwn->unit_serial[0]); 1950c66ac9dbSNicholas Bellinger file = filp_open(path, flags, 0600); 19510e9b10a9SAl Viro if (IS_ERR(file)) { 19526708bb27SAndy Grover pr_err("filp_open(%s) for APTPL metadata" 1953c66ac9dbSNicholas Bellinger " failed\n", path); 19540e9b10a9SAl Viro return PTR_ERR(file); 1955c66ac9dbSNicholas Bellinger } 1956c66ac9dbSNicholas Bellinger 19574dee96fbSAndy Grover pr_aptpl_buf_len = (strlen(buf) + 1); /* Add extra for NULL */ 1958c66ac9dbSNicholas Bellinger 19590e9b10a9SAl Viro ret = kernel_write(file, buf, pr_aptpl_buf_len, 0); 1960c66ac9dbSNicholas Bellinger 19610e9b10a9SAl Viro if (ret < 0) 19626708bb27SAndy Grover pr_debug("Error writing APTPL metadata file: %s\n", path); 19630e9b10a9SAl Viro fput(file); 1964c66ac9dbSNicholas Bellinger 1965f730f915SGera Kazakov return (ret < 0) ? -EIO : 0; 1966c66ac9dbSNicholas Bellinger } 1967c66ac9dbSNicholas Bellinger 1968c66ac9dbSNicholas Bellinger /* 1969459f213bSAndy Grover * Clear the APTPL metadata if APTPL has been disabled, otherwise 1970459f213bSAndy Grover * write out the updated metadata to struct file for this SCSI device. 1971c66ac9dbSNicholas Bellinger */ 19728a391857SNicholas Bellinger static sense_reason_t core_scsi3_update_and_write_aptpl(struct se_device *dev, bool aptpl) 1973459f213bSAndy Grover { 19748a391857SNicholas Bellinger unsigned char *buf; 1975f161d4b4SNicholas Bellinger int rc, len = PR_APTPL_BUF_LEN; 1976459f213bSAndy Grover 1977459f213bSAndy Grover if (!aptpl) { 1978459f213bSAndy Grover char *null_buf = "No Registrations or Reservations\n"; 1979459f213bSAndy Grover 19808a391857SNicholas Bellinger rc = __core_scsi3_write_aptpl_to_file(dev, null_buf); 1981459f213bSAndy Grover dev->t10_pr.pr_aptpl_active = 0; 1982459f213bSAndy Grover pr_debug("SPC-3 PR: Set APTPL Bit Deactivated\n"); 19838a391857SNicholas Bellinger 19848a391857SNicholas Bellinger if (rc) 19858a391857SNicholas Bellinger return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 19868a391857SNicholas Bellinger 19878a391857SNicholas Bellinger return 0; 19888a391857SNicholas Bellinger } 1989f161d4b4SNicholas Bellinger retry: 1990f161d4b4SNicholas Bellinger buf = vzalloc(len); 1991459f213bSAndy Grover if (!buf) 19928a391857SNicholas Bellinger return TCM_OUT_OF_RESOURCES; 1993459f213bSAndy Grover 1994f161d4b4SNicholas Bellinger rc = core_scsi3_update_aptpl_buf(dev, buf, len); 19958a391857SNicholas Bellinger if (rc < 0) { 1996f161d4b4SNicholas Bellinger vfree(buf); 1997f161d4b4SNicholas Bellinger len *= 2; 1998f161d4b4SNicholas Bellinger goto retry; 19990607decdSAndy Grover } 2000de103c93SChristoph Hellwig 20018a391857SNicholas Bellinger rc = __core_scsi3_write_aptpl_to_file(dev, buf); 20028a391857SNicholas Bellinger if (rc != 0) { 2003459f213bSAndy Grover pr_err("SPC-3 PR: Could not update APTPL\n"); 2004f161d4b4SNicholas Bellinger vfree(buf); 20058a391857SNicholas Bellinger return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2006459f213bSAndy Grover } 20078a391857SNicholas Bellinger dev->t10_pr.pr_aptpl_active = 1; 2008f161d4b4SNicholas Bellinger vfree(buf); 20098a391857SNicholas Bellinger pr_debug("SPC-3 PR: Set APTPL Bit Activated\n"); 20108a391857SNicholas Bellinger return 0; 2011c66ac9dbSNicholas Bellinger } 2012c66ac9dbSNicholas Bellinger 2013de103c93SChristoph Hellwig static sense_reason_t 2014de103c93SChristoph Hellwig core_scsi3_emulate_pro_register(struct se_cmd *cmd, u64 res_key, u64 sa_res_key, 2015bc118fe4SAndy Grover bool aptpl, bool all_tg_pt, bool spec_i_pt, enum register_type register_type) 2016c66ac9dbSNicholas Bellinger { 2017e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 20185951146dSAndy Grover struct se_device *dev = cmd->se_dev; 2019c66ac9dbSNicholas Bellinger struct se_dev_entry *se_deve; 2020e3d6f909SAndy Grover struct se_lun *se_lun = cmd->se_lun; 2021c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg; 2022bc118fe4SAndy Grover struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_reg_tmp; 20230fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 2024c66ac9dbSNicholas Bellinger unsigned char isid_buf[PR_REG_ISID_LEN], *isid_ptr = NULL; 2025a0d50f62SHannes Reinecke sense_reason_t ret = TCM_NO_SENSE; 2026fc09149dSNicholas Bellinger int pr_holder = 0, type; 2027c66ac9dbSNicholas Bellinger 20286708bb27SAndy Grover if (!se_sess || !se_lun) { 20296708bb27SAndy Grover pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); 2030de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2031c66ac9dbSNicholas Bellinger } 2032c66ac9dbSNicholas Bellinger se_tpg = se_sess->se_tpg; 2033f2083241SJörn Engel se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; 2034c66ac9dbSNicholas Bellinger 2035e3d6f909SAndy Grover if (se_tpg->se_tpg_tfo->sess_get_initiator_sid) { 2036c66ac9dbSNicholas Bellinger memset(&isid_buf[0], 0, PR_REG_ISID_LEN); 2037e3d6f909SAndy Grover se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, &isid_buf[0], 2038c66ac9dbSNicholas Bellinger PR_REG_ISID_LEN); 2039c66ac9dbSNicholas Bellinger isid_ptr = &isid_buf[0]; 2040c66ac9dbSNicholas Bellinger } 2041c66ac9dbSNicholas Bellinger /* 2042c66ac9dbSNicholas Bellinger * Follow logic from spc4r17 Section 5.7.7, Register Behaviors Table 47 2043c66ac9dbSNicholas Bellinger */ 2044bc118fe4SAndy Grover pr_reg = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess); 2045bc118fe4SAndy Grover if (!pr_reg) { 2046c66ac9dbSNicholas Bellinger if (res_key) { 20476708bb27SAndy Grover pr_warn("SPC-3 PR: Reservation Key non-zero" 2048c66ac9dbSNicholas Bellinger " for SA REGISTER, returning CONFLICT\n"); 2049de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 2050c66ac9dbSNicholas Bellinger } 2051c66ac9dbSNicholas Bellinger /* 2052c66ac9dbSNicholas Bellinger * Do nothing but return GOOD status. 2053c66ac9dbSNicholas Bellinger */ 20546708bb27SAndy Grover if (!sa_res_key) 205503e98c9eSNicholas Bellinger return 0; 2056c66ac9dbSNicholas Bellinger 20576708bb27SAndy Grover if (!spec_i_pt) { 2058c66ac9dbSNicholas Bellinger /* 2059c66ac9dbSNicholas Bellinger * Perform the Service Action REGISTER on the Initiator 2060c66ac9dbSNicholas Bellinger * Port Endpoint that the PRO was received from on the 2061c66ac9dbSNicholas Bellinger * Logical Unit of the SCSI device server. 2062c66ac9dbSNicholas Bellinger */ 2063de103c93SChristoph Hellwig if (core_scsi3_alloc_registration(cmd->se_dev, 2064c66ac9dbSNicholas Bellinger se_sess->se_node_acl, se_deve, isid_ptr, 2065c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl, 206633ce6a87SAndy Grover register_type, 0)) { 20676708bb27SAndy Grover pr_err("Unable to allocate" 2068c66ac9dbSNicholas Bellinger " struct t10_pr_registration\n"); 2069de103c93SChristoph Hellwig return TCM_INVALID_PARAMETER_LIST; 2070c66ac9dbSNicholas Bellinger } 2071c66ac9dbSNicholas Bellinger } else { 2072c66ac9dbSNicholas Bellinger /* 2073c66ac9dbSNicholas Bellinger * Register both the Initiator port that received 2074c66ac9dbSNicholas Bellinger * PROUT SA REGISTER + SPEC_I_PT=1 and extract SCSI 2075c66ac9dbSNicholas Bellinger * TransportID from Parameter list and loop through 2076c66ac9dbSNicholas Bellinger * fabric dependent parameter list while calling 2077c66ac9dbSNicholas Bellinger * logic from of core_scsi3_alloc_registration() for 2078c66ac9dbSNicholas Bellinger * each TransportID provided SCSI Initiator Port/Device 2079c66ac9dbSNicholas Bellinger */ 2080c66ac9dbSNicholas Bellinger ret = core_scsi3_decode_spec_i_port(cmd, se_tpg, 2081c66ac9dbSNicholas Bellinger isid_ptr, sa_res_key, all_tg_pt, aptpl); 2082c66ac9dbSNicholas Bellinger if (ret != 0) 2083c66ac9dbSNicholas Bellinger return ret; 2084c66ac9dbSNicholas Bellinger } 2085c66ac9dbSNicholas Bellinger 2086459f213bSAndy Grover return core_scsi3_update_and_write_aptpl(dev, aptpl); 2087de103c93SChristoph Hellwig } 2088de103c93SChristoph Hellwig 2089bc118fe4SAndy Grover /* ok, existing registration */ 2090c66ac9dbSNicholas Bellinger 2091bc118fe4SAndy Grover if ((register_type == REGISTER) && (res_key != pr_reg->pr_res_key)) { 20926708bb27SAndy Grover pr_err("SPC-3 PR REGISTER: Received" 2093c66ac9dbSNicholas Bellinger " res_key: 0x%016Lx does not match" 2094c66ac9dbSNicholas Bellinger " existing SA REGISTER res_key:" 2095c66ac9dbSNicholas Bellinger " 0x%016Lx\n", res_key, 2096c66ac9dbSNicholas Bellinger pr_reg->pr_res_key); 2097de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 2098bc118fe4SAndy Grover goto out; 2099c66ac9dbSNicholas Bellinger } 2100de103c93SChristoph Hellwig 2101c66ac9dbSNicholas Bellinger if (spec_i_pt) { 21021f070cc2SAndy Grover pr_err("SPC-3 PR REGISTER: SPEC_I_PT" 21031f070cc2SAndy Grover " set on a registered nexus\n"); 2104de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 2105bc118fe4SAndy Grover goto out; 2106c66ac9dbSNicholas Bellinger } 2107de103c93SChristoph Hellwig 2108c66ac9dbSNicholas Bellinger /* 2109c66ac9dbSNicholas Bellinger * An existing ALL_TG_PT=1 registration being released 2110c66ac9dbSNicholas Bellinger * must also set ALL_TG_PT=1 in the incoming PROUT. 2111c66ac9dbSNicholas Bellinger */ 21121f070cc2SAndy Grover if (pr_reg->pr_reg_all_tg_pt && !all_tg_pt) { 21131f070cc2SAndy Grover pr_err("SPC-3 PR REGISTER: ALL_TG_PT=1" 2114c66ac9dbSNicholas Bellinger " registration exists, but ALL_TG_PT=1 bit not" 2115c66ac9dbSNicholas Bellinger " present in received PROUT\n"); 2116de103c93SChristoph Hellwig ret = TCM_INVALID_CDB_FIELD; 2117bc118fe4SAndy Grover goto out; 2118c66ac9dbSNicholas Bellinger } 2119de103c93SChristoph Hellwig 2120c66ac9dbSNicholas Bellinger /* 212151d9c41dSAndy Grover * sa_res_key=1 Change Reservation Key for registered I_T Nexus. 2122c66ac9dbSNicholas Bellinger */ 212351d9c41dSAndy Grover if (sa_res_key) { 212451d9c41dSAndy Grover /* 212551d9c41dSAndy Grover * Increment PRgeneration counter for struct se_device" 212651d9c41dSAndy Grover * upon a successful REGISTER, see spc4r17 section 6.3.2 212751d9c41dSAndy Grover * READ_KEYS service action. 212851d9c41dSAndy Grover */ 212951d9c41dSAndy Grover pr_reg->pr_res_generation = core_scsi3_pr_generation(cmd->se_dev); 213051d9c41dSAndy Grover pr_reg->pr_res_key = sa_res_key; 213151d9c41dSAndy Grover pr_debug("SPC-3 PR [%s] REGISTER%s: Changed Reservation" 213251d9c41dSAndy Grover " Key for %s to: 0x%016Lx PRgeneration:" 213351d9c41dSAndy Grover " 0x%08x\n", cmd->se_tfo->get_fabric_name(), 213451d9c41dSAndy Grover (register_type == REGISTER_AND_IGNORE_EXISTING_KEY) ? "_AND_IGNORE_EXISTING_KEY" : "", 213551d9c41dSAndy Grover pr_reg->pr_reg_nacl->initiatorname, 213651d9c41dSAndy Grover pr_reg->pr_res_key, pr_reg->pr_res_generation); 213751d9c41dSAndy Grover 213851d9c41dSAndy Grover } else { 213951d9c41dSAndy Grover /* 214051d9c41dSAndy Grover * sa_res_key=0 Unregister Reservation Key for registered I_T Nexus. 214151d9c41dSAndy Grover */ 21426c3c9baaSNicholas Bellinger type = pr_reg->pr_res_type; 21436c3c9baaSNicholas Bellinger pr_holder = core_scsi3_check_implicit_release(cmd->se_dev, 21446c3c9baaSNicholas Bellinger pr_reg); 2145c66ac9dbSNicholas Bellinger if (pr_holder < 0) { 2146de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 2147bc118fe4SAndy Grover goto out; 2148c66ac9dbSNicholas Bellinger } 2149c66ac9dbSNicholas Bellinger 2150c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 2151c66ac9dbSNicholas Bellinger /* 2152c66ac9dbSNicholas Bellinger * Release all ALL_TG_PT=1 for the matching SCSI Initiator Port 2153c66ac9dbSNicholas Bellinger * and matching pr_res_key. 2154c66ac9dbSNicholas Bellinger */ 2155c66ac9dbSNicholas Bellinger if (pr_reg->pr_reg_all_tg_pt) { 2156c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg_p, pr_reg_tmp, 2157c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, 2158c66ac9dbSNicholas Bellinger pr_reg_list) { 2159c66ac9dbSNicholas Bellinger 21606708bb27SAndy Grover if (!pr_reg_p->pr_reg_all_tg_pt) 2161c66ac9dbSNicholas Bellinger continue; 2162c66ac9dbSNicholas Bellinger if (pr_reg_p->pr_res_key != res_key) 2163c66ac9dbSNicholas Bellinger continue; 2164c66ac9dbSNicholas Bellinger if (pr_reg == pr_reg_p) 2165c66ac9dbSNicholas Bellinger continue; 2166c66ac9dbSNicholas Bellinger if (strcmp(pr_reg->pr_reg_nacl->initiatorname, 2167c66ac9dbSNicholas Bellinger pr_reg_p->pr_reg_nacl->initiatorname)) 2168c66ac9dbSNicholas Bellinger continue; 2169c66ac9dbSNicholas Bellinger 2170c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, 2171c66ac9dbSNicholas Bellinger pr_reg_p, NULL, 0); 2172c66ac9dbSNicholas Bellinger } 2173c66ac9dbSNicholas Bellinger } 2174de103c93SChristoph Hellwig 2175c66ac9dbSNicholas Bellinger /* 2176c66ac9dbSNicholas Bellinger * Release the calling I_T Nexus registration now.. 2177c66ac9dbSNicholas Bellinger */ 2178de103c93SChristoph Hellwig __core_scsi3_free_registration(cmd->se_dev, pr_reg, NULL, 1); 2179fc09149dSNicholas Bellinger pr_reg = NULL; 2180de103c93SChristoph Hellwig 2181c66ac9dbSNicholas Bellinger /* 2182c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.11.3 Unregistering 2183c66ac9dbSNicholas Bellinger * 2184c66ac9dbSNicholas Bellinger * If the persistent reservation is a registrants only 2185c66ac9dbSNicholas Bellinger * type, the device server shall establish a unit 2186c66ac9dbSNicholas Bellinger * attention condition for the initiator port associated 2187c66ac9dbSNicholas Bellinger * with every registered I_T nexus except for the I_T 2188c66ac9dbSNicholas Bellinger * nexus on which the PERSISTENT RESERVE OUT command was 2189c66ac9dbSNicholas Bellinger * received, with the additional sense code set to 2190c66ac9dbSNicholas Bellinger * RESERVATIONS RELEASED. 2191c66ac9dbSNicholas Bellinger */ 2192c66ac9dbSNicholas Bellinger if (pr_holder && 2193fc09149dSNicholas Bellinger (type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY || 2194fc09149dSNicholas Bellinger type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY)) { 2195c66ac9dbSNicholas Bellinger list_for_each_entry(pr_reg_p, 2196c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, 2197c66ac9dbSNicholas Bellinger pr_reg_list) { 2198c66ac9dbSNicholas Bellinger 2199c66ac9dbSNicholas Bellinger core_scsi3_ua_allocate( 2200c66ac9dbSNicholas Bellinger pr_reg_p->pr_reg_nacl, 2201c66ac9dbSNicholas Bellinger pr_reg_p->pr_res_mapped_lun, 2202c66ac9dbSNicholas Bellinger 0x2A, 2203c66ac9dbSNicholas Bellinger ASCQ_2AH_RESERVATIONS_RELEASED); 2204c66ac9dbSNicholas Bellinger } 2205c66ac9dbSNicholas Bellinger } 220651d9c41dSAndy Grover 2207c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 2208de103c93SChristoph Hellwig } 2209de103c93SChristoph Hellwig 2210459f213bSAndy Grover ret = core_scsi3_update_and_write_aptpl(dev, aptpl); 2211c66ac9dbSNicholas Bellinger 2212bc118fe4SAndy Grover out: 2213fc09149dSNicholas Bellinger if (pr_reg) 2214c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2215de103c93SChristoph Hellwig return ret; 2216c66ac9dbSNicholas Bellinger } 2217c66ac9dbSNicholas Bellinger 2218c66ac9dbSNicholas Bellinger unsigned char *core_scsi3_pr_dump_type(int type) 2219c66ac9dbSNicholas Bellinger { 2220c66ac9dbSNicholas Bellinger switch (type) { 2221c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE: 2222c66ac9dbSNicholas Bellinger return "Write Exclusive Access"; 2223c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS: 2224c66ac9dbSNicholas Bellinger return "Exclusive Access"; 2225c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: 2226c66ac9dbSNicholas Bellinger return "Write Exclusive Access, Registrants Only"; 2227c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: 2228c66ac9dbSNicholas Bellinger return "Exclusive Access, Registrants Only"; 2229c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: 2230c66ac9dbSNicholas Bellinger return "Write Exclusive Access, All Registrants"; 2231c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: 2232c66ac9dbSNicholas Bellinger return "Exclusive Access, All Registrants"; 2233c66ac9dbSNicholas Bellinger default: 2234c66ac9dbSNicholas Bellinger break; 2235c66ac9dbSNicholas Bellinger } 2236c66ac9dbSNicholas Bellinger 2237c66ac9dbSNicholas Bellinger return "Unknown SPC-3 PR Type"; 2238c66ac9dbSNicholas Bellinger } 2239c66ac9dbSNicholas Bellinger 2240de103c93SChristoph Hellwig static sense_reason_t 2241de103c93SChristoph Hellwig core_scsi3_pro_reserve(struct se_cmd *cmd, int type, int scope, u64 res_key) 2242c66ac9dbSNicholas Bellinger { 2243de103c93SChristoph Hellwig struct se_device *dev = cmd->se_dev; 2244e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 2245e3d6f909SAndy Grover struct se_lun *se_lun = cmd->se_lun; 2246c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_res_holder; 22470fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 2248c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 2249de103c93SChristoph Hellwig sense_reason_t ret; 2250c66ac9dbSNicholas Bellinger 2251c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 2252c66ac9dbSNicholas Bellinger 22536708bb27SAndy Grover if (!se_sess || !se_lun) { 22546708bb27SAndy Grover pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); 2255de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2256c66ac9dbSNicholas Bellinger } 2257c66ac9dbSNicholas Bellinger /* 2258c66ac9dbSNicholas Bellinger * Locate the existing *pr_reg via struct se_node_acl pointers 2259c66ac9dbSNicholas Bellinger */ 22605951146dSAndy Grover pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, 2261c66ac9dbSNicholas Bellinger se_sess); 22626708bb27SAndy Grover if (!pr_reg) { 22636708bb27SAndy Grover pr_err("SPC-3 PR: Unable to locate" 2264c66ac9dbSNicholas Bellinger " PR_REGISTERED *pr_reg for RESERVE\n"); 2265de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2266c66ac9dbSNicholas Bellinger } 2267c66ac9dbSNicholas Bellinger /* 2268c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2269c66ac9dbSNicholas Bellinger * 2270c66ac9dbSNicholas Bellinger * An application client creates a persistent reservation by issuing 2271c66ac9dbSNicholas Bellinger * a PERSISTENT RESERVE OUT command with RESERVE service action through 2272c66ac9dbSNicholas Bellinger * a registered I_T nexus with the following parameters: 2273c66ac9dbSNicholas Bellinger * a) RESERVATION KEY set to the value of the reservation key that is 2274c66ac9dbSNicholas Bellinger * registered with the logical unit for the I_T nexus; and 2275c66ac9dbSNicholas Bellinger */ 2276c66ac9dbSNicholas Bellinger if (res_key != pr_reg->pr_res_key) { 22776708bb27SAndy Grover pr_err("SPC-3 PR RESERVE: Received res_key: 0x%016Lx" 2278c66ac9dbSNicholas Bellinger " does not match existing SA REGISTER res_key:" 2279c66ac9dbSNicholas Bellinger " 0x%016Lx\n", res_key, pr_reg->pr_res_key); 2280de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 2281de103c93SChristoph Hellwig goto out_put_pr_reg; 2282c66ac9dbSNicholas Bellinger } 2283c66ac9dbSNicholas Bellinger /* 2284c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2285c66ac9dbSNicholas Bellinger * 2286c66ac9dbSNicholas Bellinger * From above: 2287c66ac9dbSNicholas Bellinger * b) TYPE field and SCOPE field set to the persistent reservation 2288c66ac9dbSNicholas Bellinger * being created. 2289c66ac9dbSNicholas Bellinger * 2290c66ac9dbSNicholas Bellinger * Only one persistent reservation is allowed at a time per logical unit 2291c66ac9dbSNicholas Bellinger * and that persistent reservation has a scope of LU_SCOPE. 2292c66ac9dbSNicholas Bellinger */ 2293c66ac9dbSNicholas Bellinger if (scope != PR_SCOPE_LU_SCOPE) { 22946708bb27SAndy Grover pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope); 2295de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 2296de103c93SChristoph Hellwig goto out_put_pr_reg; 2297c66ac9dbSNicholas Bellinger } 2298c66ac9dbSNicholas Bellinger /* 2299c66ac9dbSNicholas Bellinger * See if we have an existing PR reservation holder pointer at 2300c66ac9dbSNicholas Bellinger * struct se_device->dev_pr_res_holder in the form struct t10_pr_registration 2301c66ac9dbSNicholas Bellinger * *pr_res_holder. 2302c66ac9dbSNicholas Bellinger */ 2303c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 2304c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 2305ee1b1b9cSAndy Grover if (pr_res_holder) { 2306c66ac9dbSNicholas Bellinger /* 2307c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2308c66ac9dbSNicholas Bellinger * 2309c66ac9dbSNicholas Bellinger * If the device server receives a PERSISTENT RESERVE OUT 2310c66ac9dbSNicholas Bellinger * command from an I_T nexus other than a persistent reservation 2311c66ac9dbSNicholas Bellinger * holder (see 5.7.10) that attempts to create a persistent 2312c66ac9dbSNicholas Bellinger * reservation when a persistent reservation already exists for 2313c66ac9dbSNicholas Bellinger * the logical unit, then the command shall be completed with 2314c66ac9dbSNicholas Bellinger * RESERVATION CONFLICT status. 2315c66ac9dbSNicholas Bellinger */ 2316e673dc92SIlias Tsitsimpis if (!is_reservation_holder(pr_res_holder, pr_reg)) { 2317c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 23186708bb27SAndy Grover pr_err("SPC-3 PR: Attempted RESERVE from" 2319c66ac9dbSNicholas Bellinger " [%s]: %s while reservation already held by" 2320c66ac9dbSNicholas Bellinger " [%s]: %s, returning RESERVATION_CONFLICT\n", 2321e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), 2322c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, 2323e3d6f909SAndy Grover pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 2324c66ac9dbSNicholas Bellinger pr_res_holder->pr_reg_nacl->initiatorname); 2325c66ac9dbSNicholas Bellinger 2326c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2327de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 2328de103c93SChristoph Hellwig goto out_put_pr_reg; 2329c66ac9dbSNicholas Bellinger } 2330c66ac9dbSNicholas Bellinger /* 2331c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2332c66ac9dbSNicholas Bellinger * 2333c66ac9dbSNicholas Bellinger * If a persistent reservation holder attempts to modify the 2334c66ac9dbSNicholas Bellinger * type or scope of an existing persistent reservation, the 2335c66ac9dbSNicholas Bellinger * command shall be completed with RESERVATION CONFLICT status. 2336c66ac9dbSNicholas Bellinger */ 2337c66ac9dbSNicholas Bellinger if ((pr_res_holder->pr_res_type != type) || 2338c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_scope != scope)) { 2339c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 23406708bb27SAndy Grover pr_err("SPC-3 PR: Attempted RESERVE from" 2341c66ac9dbSNicholas Bellinger " [%s]: %s trying to change TYPE and/or SCOPE," 2342c66ac9dbSNicholas Bellinger " while reservation already held by [%s]: %s," 2343c66ac9dbSNicholas Bellinger " returning RESERVATION_CONFLICT\n", 2344e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), 2345c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, 2346e3d6f909SAndy Grover pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 2347c66ac9dbSNicholas Bellinger pr_res_holder->pr_reg_nacl->initiatorname); 2348c66ac9dbSNicholas Bellinger 2349c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2350de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 2351de103c93SChristoph Hellwig goto out_put_pr_reg; 2352c66ac9dbSNicholas Bellinger } 2353c66ac9dbSNicholas Bellinger /* 2354c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2355c66ac9dbSNicholas Bellinger * 2356c66ac9dbSNicholas Bellinger * If the device server receives a PERSISTENT RESERVE OUT 2357c66ac9dbSNicholas Bellinger * command with RESERVE service action where the TYPE field and 2358c66ac9dbSNicholas Bellinger * the SCOPE field contain the same values as the existing type 2359c66ac9dbSNicholas Bellinger * and scope from a persistent reservation holder, it shall not 2360c66ac9dbSNicholas Bellinger * make any change to the existing persistent reservation and 2361c66ac9dbSNicholas Bellinger * shall completethe command with GOOD status. 2362c66ac9dbSNicholas Bellinger */ 2363c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2364de103c93SChristoph Hellwig ret = 0; 2365de103c93SChristoph Hellwig goto out_put_pr_reg; 2366c66ac9dbSNicholas Bellinger } 2367c66ac9dbSNicholas Bellinger /* 2368c66ac9dbSNicholas Bellinger * Otherwise, our *pr_reg becomes the PR reservation holder for said 2369c66ac9dbSNicholas Bellinger * TYPE/SCOPE. Also set the received scope and type in *pr_reg. 2370c66ac9dbSNicholas Bellinger */ 2371c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope = scope; 2372c66ac9dbSNicholas Bellinger pr_reg->pr_res_type = type; 2373c66ac9dbSNicholas Bellinger pr_reg->pr_res_holder = 1; 2374c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = pr_reg; 2375d2843c17SAndy Grover core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 2376c66ac9dbSNicholas Bellinger 23776708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: RESERVE created new" 2378c66ac9dbSNicholas Bellinger " reservation holder TYPE: %s ALL_TG_PT: %d\n", 2379e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), core_scsi3_pr_dump_type(type), 2380c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); 23816708bb27SAndy Grover pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n", 2382e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), 2383c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, 2384d2843c17SAndy Grover i_buf); 2385c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2386c66ac9dbSNicholas Bellinger 2387459f213bSAndy Grover if (pr_tmpl->pr_aptpl_active) 2388459f213bSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, true); 2389c66ac9dbSNicholas Bellinger 2390de103c93SChristoph Hellwig ret = 0; 2391de103c93SChristoph Hellwig out_put_pr_reg: 2392de103c93SChristoph Hellwig core_scsi3_put_pr_reg(pr_reg); 2393de103c93SChristoph Hellwig return ret; 2394de103c93SChristoph Hellwig } 2395de103c93SChristoph Hellwig 2396de103c93SChristoph Hellwig static sense_reason_t 2397de103c93SChristoph Hellwig core_scsi3_emulate_pro_reserve(struct se_cmd *cmd, int type, int scope, 2398c66ac9dbSNicholas Bellinger u64 res_key) 2399c66ac9dbSNicholas Bellinger { 2400c66ac9dbSNicholas Bellinger switch (type) { 2401c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE: 2402c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS: 2403c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: 2404c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: 2405c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: 2406c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: 2407de103c93SChristoph Hellwig return core_scsi3_pro_reserve(cmd, type, scope, res_key); 2408c66ac9dbSNicholas Bellinger default: 24096708bb27SAndy Grover pr_err("SPC-3 PR: Unknown Service Action RESERVE Type:" 2410c66ac9dbSNicholas Bellinger " 0x%02x\n", type); 2411de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 2412c66ac9dbSNicholas Bellinger } 2413c66ac9dbSNicholas Bellinger } 2414c66ac9dbSNicholas Bellinger 2415c66ac9dbSNicholas Bellinger /* 2416c66ac9dbSNicholas Bellinger * Called with struct se_device->dev_reservation_lock held. 2417c66ac9dbSNicholas Bellinger */ 2418c66ac9dbSNicholas Bellinger static void __core_scsi3_complete_pro_release( 2419c66ac9dbSNicholas Bellinger struct se_device *dev, 2420c66ac9dbSNicholas Bellinger struct se_node_acl *se_nacl, 2421c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 24226c3c9baaSNicholas Bellinger int explicit, 24236c3c9baaSNicholas Bellinger int unreg) 2424c66ac9dbSNicholas Bellinger { 24259ac8928eSChristoph Hellwig const struct target_core_fabric_ops *tfo = se_nacl->se_tpg->se_tpg_tfo; 2426c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 24276c3c9baaSNicholas Bellinger int pr_res_type = 0, pr_res_scope = 0; 2428c66ac9dbSNicholas Bellinger 2429c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 2430d2843c17SAndy Grover core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 2431c66ac9dbSNicholas Bellinger /* 2432c66ac9dbSNicholas Bellinger * Go ahead and release the current PR reservation holder. 24336c3c9baaSNicholas Bellinger * If an All Registrants reservation is currently active and 24346c3c9baaSNicholas Bellinger * a unregister operation is requested, replace the current 24356c3c9baaSNicholas Bellinger * dev_pr_res_holder with another active registration. 2436c66ac9dbSNicholas Bellinger */ 24376c3c9baaSNicholas Bellinger if (dev->dev_pr_res_holder) { 24386c3c9baaSNicholas Bellinger pr_res_type = dev->dev_pr_res_holder->pr_res_type; 24396c3c9baaSNicholas Bellinger pr_res_scope = dev->dev_pr_res_holder->pr_res_scope; 24406c3c9baaSNicholas Bellinger dev->dev_pr_res_holder->pr_res_type = 0; 24416c3c9baaSNicholas Bellinger dev->dev_pr_res_holder->pr_res_scope = 0; 24426c3c9baaSNicholas Bellinger dev->dev_pr_res_holder->pr_res_holder = 0; 2443c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = NULL; 24446c3c9baaSNicholas Bellinger } 24456c3c9baaSNicholas Bellinger if (!unreg) 24466c3c9baaSNicholas Bellinger goto out; 2447c66ac9dbSNicholas Bellinger 24486c3c9baaSNicholas Bellinger spin_lock(&dev->t10_pr.registration_lock); 24496c3c9baaSNicholas Bellinger list_del_init(&pr_reg->pr_reg_list); 24506c3c9baaSNicholas Bellinger /* 24516c3c9baaSNicholas Bellinger * If the I_T nexus is a reservation holder, the persistent reservation 24526c3c9baaSNicholas Bellinger * is of an all registrants type, and the I_T nexus is the last remaining 24536c3c9baaSNicholas Bellinger * registered I_T nexus, then the device server shall also release the 24546c3c9baaSNicholas Bellinger * persistent reservation. 24556c3c9baaSNicholas Bellinger */ 24566c3c9baaSNicholas Bellinger if (!list_empty(&dev->t10_pr.registration_list) && 24576c3c9baaSNicholas Bellinger ((pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 24586c3c9baaSNicholas Bellinger (pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG))) { 24596c3c9baaSNicholas Bellinger dev->dev_pr_res_holder = 24606c3c9baaSNicholas Bellinger list_entry(dev->t10_pr.registration_list.next, 24616c3c9baaSNicholas Bellinger struct t10_pr_registration, pr_reg_list); 24626c3c9baaSNicholas Bellinger dev->dev_pr_res_holder->pr_res_type = pr_res_type; 24636c3c9baaSNicholas Bellinger dev->dev_pr_res_holder->pr_res_scope = pr_res_scope; 24646c3c9baaSNicholas Bellinger dev->dev_pr_res_holder->pr_res_holder = 1; 24656c3c9baaSNicholas Bellinger } 24666c3c9baaSNicholas Bellinger spin_unlock(&dev->t10_pr.registration_lock); 24676c3c9baaSNicholas Bellinger out: 24686c3c9baaSNicholas Bellinger if (!dev->dev_pr_res_holder) { 24696708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: %s RELEASE cleared" 2470c66ac9dbSNicholas Bellinger " reservation holder TYPE: %s ALL_TG_PT: %d\n", 24716c3c9baaSNicholas Bellinger tfo->get_fabric_name(), (explicit) ? "explicit" : 24726c3c9baaSNicholas Bellinger "implicit", core_scsi3_pr_dump_type(pr_res_type), 2473c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); 24746c3c9baaSNicholas Bellinger } 24756708bb27SAndy Grover pr_debug("SPC-3 PR [%s] RELEASE Node: %s%s\n", 2476c66ac9dbSNicholas Bellinger tfo->get_fabric_name(), se_nacl->initiatorname, 2477d2843c17SAndy Grover i_buf); 2478c66ac9dbSNicholas Bellinger /* 2479c66ac9dbSNicholas Bellinger * Clear TYPE and SCOPE for the next PROUT Service Action: RESERVE 2480c66ac9dbSNicholas Bellinger */ 2481c66ac9dbSNicholas Bellinger pr_reg->pr_res_holder = pr_reg->pr_res_type = pr_reg->pr_res_scope = 0; 2482c66ac9dbSNicholas Bellinger } 2483c66ac9dbSNicholas Bellinger 2484de103c93SChristoph Hellwig static sense_reason_t 2485de103c93SChristoph Hellwig core_scsi3_emulate_pro_release(struct se_cmd *cmd, int type, int scope, 2486c66ac9dbSNicholas Bellinger u64 res_key) 2487c66ac9dbSNicholas Bellinger { 2488c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 2489e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 2490e3d6f909SAndy Grover struct se_lun *se_lun = cmd->se_lun; 2491c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_res_holder; 24920fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 2493de103c93SChristoph Hellwig sense_reason_t ret = 0; 2494c66ac9dbSNicholas Bellinger 24956708bb27SAndy Grover if (!se_sess || !se_lun) { 24966708bb27SAndy Grover pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); 2497de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2498c66ac9dbSNicholas Bellinger } 2499c66ac9dbSNicholas Bellinger /* 2500c66ac9dbSNicholas Bellinger * Locate the existing *pr_reg via struct se_node_acl pointers 2501c66ac9dbSNicholas Bellinger */ 2502c66ac9dbSNicholas Bellinger pr_reg = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess); 25036708bb27SAndy Grover if (!pr_reg) { 25046708bb27SAndy Grover pr_err("SPC-3 PR: Unable to locate" 2505c66ac9dbSNicholas Bellinger " PR_REGISTERED *pr_reg for RELEASE\n"); 2506de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2507c66ac9dbSNicholas Bellinger } 2508c66ac9dbSNicholas Bellinger /* 2509c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.11.2 Releasing: 2510c66ac9dbSNicholas Bellinger * 2511c66ac9dbSNicholas Bellinger * If there is no persistent reservation or in response to a persistent 2512c66ac9dbSNicholas Bellinger * reservation release request from a registered I_T nexus that is not a 2513c66ac9dbSNicholas Bellinger * persistent reservation holder (see 5.7.10), the device server shall 2514c66ac9dbSNicholas Bellinger * do the following: 2515c66ac9dbSNicholas Bellinger * 2516c66ac9dbSNicholas Bellinger * a) Not release the persistent reservation, if any; 2517c66ac9dbSNicholas Bellinger * b) Not remove any registrations; and 2518c66ac9dbSNicholas Bellinger * c) Complete the command with GOOD status. 2519c66ac9dbSNicholas Bellinger */ 2520c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 2521c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 25226708bb27SAndy Grover if (!pr_res_holder) { 2523c66ac9dbSNicholas Bellinger /* 2524c66ac9dbSNicholas Bellinger * No persistent reservation, return GOOD status. 2525c66ac9dbSNicholas Bellinger */ 2526c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2527bb7a8c8eSNicholas Bellinger goto out_put_pr_reg; 2528c66ac9dbSNicholas Bellinger } 2529c66ac9dbSNicholas Bellinger 2530e673dc92SIlias Tsitsimpis if (!is_reservation_holder(pr_res_holder, pr_reg)) { 2531c66ac9dbSNicholas Bellinger /* 2532c66ac9dbSNicholas Bellinger * Release request from a registered I_T nexus that is not a 2533c66ac9dbSNicholas Bellinger * persistent reservation holder. return GOOD status. 2534c66ac9dbSNicholas Bellinger */ 2535c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2536de103c93SChristoph Hellwig goto out_put_pr_reg; 2537c66ac9dbSNicholas Bellinger } 2538de103c93SChristoph Hellwig 2539c66ac9dbSNicholas Bellinger /* 2540c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.11.2 Releasing: 2541c66ac9dbSNicholas Bellinger * 2542c66ac9dbSNicholas Bellinger * Only the persistent reservation holder (see 5.7.10) is allowed to 2543c66ac9dbSNicholas Bellinger * release a persistent reservation. 2544c66ac9dbSNicholas Bellinger * 2545c66ac9dbSNicholas Bellinger * An application client releases the persistent reservation by issuing 2546c66ac9dbSNicholas Bellinger * a PERSISTENT RESERVE OUT command with RELEASE service action through 2547c66ac9dbSNicholas Bellinger * an I_T nexus that is a persistent reservation holder with the 2548c66ac9dbSNicholas Bellinger * following parameters: 2549c66ac9dbSNicholas Bellinger * 2550c66ac9dbSNicholas Bellinger * a) RESERVATION KEY field set to the value of the reservation key 2551c66ac9dbSNicholas Bellinger * that is registered with the logical unit for the I_T nexus; 2552c66ac9dbSNicholas Bellinger */ 2553c66ac9dbSNicholas Bellinger if (res_key != pr_reg->pr_res_key) { 25546708bb27SAndy Grover pr_err("SPC-3 PR RELEASE: Received res_key: 0x%016Lx" 2555c66ac9dbSNicholas Bellinger " does not match existing SA REGISTER res_key:" 2556c66ac9dbSNicholas Bellinger " 0x%016Lx\n", res_key, pr_reg->pr_res_key); 2557c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2558de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 2559de103c93SChristoph Hellwig goto out_put_pr_reg; 2560c66ac9dbSNicholas Bellinger } 2561c66ac9dbSNicholas Bellinger /* 2562c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.11.2 Releasing and above: 2563c66ac9dbSNicholas Bellinger * 2564c66ac9dbSNicholas Bellinger * b) TYPE field and SCOPE field set to match the persistent 2565c66ac9dbSNicholas Bellinger * reservation being released. 2566c66ac9dbSNicholas Bellinger */ 2567c66ac9dbSNicholas Bellinger if ((pr_res_holder->pr_res_type != type) || 2568c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_scope != scope)) { 2569c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 25706708bb27SAndy Grover pr_err("SPC-3 PR RELEASE: Attempted to release" 2571c66ac9dbSNicholas Bellinger " reservation from [%s]: %s with different TYPE " 2572c66ac9dbSNicholas Bellinger "and/or SCOPE while reservation already held by" 2573c66ac9dbSNicholas Bellinger " [%s]: %s, returning RESERVATION_CONFLICT\n", 2574e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), 2575c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, 2576e3d6f909SAndy Grover pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 2577c66ac9dbSNicholas Bellinger pr_res_holder->pr_reg_nacl->initiatorname); 2578c66ac9dbSNicholas Bellinger 2579c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2580de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 2581de103c93SChristoph Hellwig goto out_put_pr_reg; 2582c66ac9dbSNicholas Bellinger } 2583c66ac9dbSNicholas Bellinger /* 2584c66ac9dbSNicholas Bellinger * In response to a persistent reservation release request from the 2585c66ac9dbSNicholas Bellinger * persistent reservation holder the device server shall perform a 2586c66ac9dbSNicholas Bellinger * release by doing the following as an uninterrupted series of actions: 2587c66ac9dbSNicholas Bellinger * a) Release the persistent reservation; 2588c66ac9dbSNicholas Bellinger * b) Not remove any registration(s); 2589c66ac9dbSNicholas Bellinger * c) If the released persistent reservation is a registrants only type 2590c66ac9dbSNicholas Bellinger * or all registrants type persistent reservation, 2591c66ac9dbSNicholas Bellinger * the device server shall establish a unit attention condition for 2592c66ac9dbSNicholas Bellinger * the initiator port associated with every regis- 2593c66ac9dbSNicholas Bellinger * tered I_T nexus other than I_T nexus on which the PERSISTENT 2594c66ac9dbSNicholas Bellinger * RESERVE OUT command with RELEASE service action was received, 2595c66ac9dbSNicholas Bellinger * with the additional sense code set to RESERVATIONS RELEASED; and 2596c66ac9dbSNicholas Bellinger * d) If the persistent reservation is of any other type, the device 2597c66ac9dbSNicholas Bellinger * server shall not establish a unit attention condition. 2598c66ac9dbSNicholas Bellinger */ 2599c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, se_sess->se_node_acl, 26006c3c9baaSNicholas Bellinger pr_reg, 1, 0); 2601c66ac9dbSNicholas Bellinger 2602c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2603c66ac9dbSNicholas Bellinger 2604c66ac9dbSNicholas Bellinger if ((type != PR_TYPE_WRITE_EXCLUSIVE_REGONLY) && 2605c66ac9dbSNicholas Bellinger (type != PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) && 2606c66ac9dbSNicholas Bellinger (type != PR_TYPE_WRITE_EXCLUSIVE_ALLREG) && 2607c66ac9dbSNicholas Bellinger (type != PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { 2608c66ac9dbSNicholas Bellinger /* 2609c66ac9dbSNicholas Bellinger * If no UNIT ATTENTION conditions will be established for 2610c66ac9dbSNicholas Bellinger * PR_TYPE_WRITE_EXCLUSIVE or PR_TYPE_EXCLUSIVE_ACCESS 2611c66ac9dbSNicholas Bellinger * go ahead and check for APTPL=1 update+write below 2612c66ac9dbSNicholas Bellinger */ 2613c66ac9dbSNicholas Bellinger goto write_aptpl; 2614c66ac9dbSNicholas Bellinger } 2615c66ac9dbSNicholas Bellinger 2616c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 2617c66ac9dbSNicholas Bellinger list_for_each_entry(pr_reg_p, &pr_tmpl->registration_list, 2618c66ac9dbSNicholas Bellinger pr_reg_list) { 2619c66ac9dbSNicholas Bellinger /* 2620c66ac9dbSNicholas Bellinger * Do not establish a UNIT ATTENTION condition 2621c66ac9dbSNicholas Bellinger * for the calling I_T Nexus 2622c66ac9dbSNicholas Bellinger */ 2623c66ac9dbSNicholas Bellinger if (pr_reg_p == pr_reg) 2624c66ac9dbSNicholas Bellinger continue; 2625c66ac9dbSNicholas Bellinger 2626c66ac9dbSNicholas Bellinger core_scsi3_ua_allocate(pr_reg_p->pr_reg_nacl, 2627c66ac9dbSNicholas Bellinger pr_reg_p->pr_res_mapped_lun, 2628c66ac9dbSNicholas Bellinger 0x2A, ASCQ_2AH_RESERVATIONS_RELEASED); 2629c66ac9dbSNicholas Bellinger } 2630c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 2631c66ac9dbSNicholas Bellinger 2632c66ac9dbSNicholas Bellinger write_aptpl: 2633459f213bSAndy Grover if (pr_tmpl->pr_aptpl_active) 2634459f213bSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, true); 2635459f213bSAndy Grover 2636de103c93SChristoph Hellwig out_put_pr_reg: 2637c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2638de103c93SChristoph Hellwig return ret; 2639c66ac9dbSNicholas Bellinger } 2640c66ac9dbSNicholas Bellinger 2641de103c93SChristoph Hellwig static sense_reason_t 2642de103c93SChristoph Hellwig core_scsi3_emulate_pro_clear(struct se_cmd *cmd, u64 res_key) 2643c66ac9dbSNicholas Bellinger { 2644c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 2645c66ac9dbSNicholas Bellinger struct se_node_acl *pr_reg_nacl; 2646e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 26470fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 2648c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder; 2649c66ac9dbSNicholas Bellinger u32 pr_res_mapped_lun = 0; 2650c66ac9dbSNicholas Bellinger int calling_it_nexus = 0; 2651c66ac9dbSNicholas Bellinger /* 2652c66ac9dbSNicholas Bellinger * Locate the existing *pr_reg via struct se_node_acl pointers 2653c66ac9dbSNicholas Bellinger */ 26545951146dSAndy Grover pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, 2655c66ac9dbSNicholas Bellinger se_sess->se_node_acl, se_sess); 26566708bb27SAndy Grover if (!pr_reg_n) { 26576708bb27SAndy Grover pr_err("SPC-3 PR: Unable to locate" 2658c66ac9dbSNicholas Bellinger " PR_REGISTERED *pr_reg for CLEAR\n"); 2659de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2660c66ac9dbSNicholas Bellinger } 2661c66ac9dbSNicholas Bellinger /* 2662c66ac9dbSNicholas Bellinger * From spc4r17 section 5.7.11.6, Clearing: 2663c66ac9dbSNicholas Bellinger * 2664c66ac9dbSNicholas Bellinger * Any application client may release the persistent reservation and 2665c66ac9dbSNicholas Bellinger * remove all registrations from a device server by issuing a 2666c66ac9dbSNicholas Bellinger * PERSISTENT RESERVE OUT command with CLEAR service action through a 2667c66ac9dbSNicholas Bellinger * registered I_T nexus with the following parameter: 2668c66ac9dbSNicholas Bellinger * 2669c66ac9dbSNicholas Bellinger * a) RESERVATION KEY field set to the value of the reservation key 2670c66ac9dbSNicholas Bellinger * that is registered with the logical unit for the I_T nexus. 2671c66ac9dbSNicholas Bellinger */ 2672c66ac9dbSNicholas Bellinger if (res_key != pr_reg_n->pr_res_key) { 26736708bb27SAndy Grover pr_err("SPC-3 PR REGISTER: Received" 2674c66ac9dbSNicholas Bellinger " res_key: 0x%016Lx does not match" 2675c66ac9dbSNicholas Bellinger " existing SA REGISTER res_key:" 2676c66ac9dbSNicholas Bellinger " 0x%016Lx\n", res_key, pr_reg_n->pr_res_key); 2677c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 2678de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 2679c66ac9dbSNicholas Bellinger } 2680c66ac9dbSNicholas Bellinger /* 2681c66ac9dbSNicholas Bellinger * a) Release the persistent reservation, if any; 2682c66ac9dbSNicholas Bellinger */ 2683c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 2684c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 2685c66ac9dbSNicholas Bellinger if (pr_res_holder) { 2686c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 2687c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, pr_res_nacl, 26886c3c9baaSNicholas Bellinger pr_res_holder, 0, 0); 2689c66ac9dbSNicholas Bellinger } 2690c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2691c66ac9dbSNicholas Bellinger /* 2692c66ac9dbSNicholas Bellinger * b) Remove all registration(s) (see spc4r17 5.7.7); 2693c66ac9dbSNicholas Bellinger */ 2694c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 2695c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 2696c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 2697c66ac9dbSNicholas Bellinger 2698c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 2699c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 2700c66ac9dbSNicholas Bellinger pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; 2701c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, NULL, 2702c66ac9dbSNicholas Bellinger calling_it_nexus); 2703c66ac9dbSNicholas Bellinger /* 2704c66ac9dbSNicholas Bellinger * e) Establish a unit attention condition for the initiator 2705c66ac9dbSNicholas Bellinger * port associated with every registered I_T nexus other 2706c66ac9dbSNicholas Bellinger * than the I_T nexus on which the PERSISTENT RESERVE OUT 2707c66ac9dbSNicholas Bellinger * command with CLEAR service action was received, with the 2708c66ac9dbSNicholas Bellinger * additional sense code set to RESERVATIONS PREEMPTED. 2709c66ac9dbSNicholas Bellinger */ 27106708bb27SAndy Grover if (!calling_it_nexus) 2711c66ac9dbSNicholas Bellinger core_scsi3_ua_allocate(pr_reg_nacl, pr_res_mapped_lun, 2712c66ac9dbSNicholas Bellinger 0x2A, ASCQ_2AH_RESERVATIONS_PREEMPTED); 2713c66ac9dbSNicholas Bellinger } 2714c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 2715c66ac9dbSNicholas Bellinger 27166708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: CLEAR complete\n", 2717e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name()); 2718c66ac9dbSNicholas Bellinger 2719459f213bSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, false); 2720c66ac9dbSNicholas Bellinger 2721c66ac9dbSNicholas Bellinger core_scsi3_pr_generation(dev); 2722c66ac9dbSNicholas Bellinger return 0; 2723c66ac9dbSNicholas Bellinger } 2724c66ac9dbSNicholas Bellinger 2725c66ac9dbSNicholas Bellinger /* 2726c66ac9dbSNicholas Bellinger * Called with struct se_device->dev_reservation_lock held. 2727c66ac9dbSNicholas Bellinger */ 2728c66ac9dbSNicholas Bellinger static void __core_scsi3_complete_pro_preempt( 2729c66ac9dbSNicholas Bellinger struct se_device *dev, 2730c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 2731c66ac9dbSNicholas Bellinger struct list_head *preempt_and_abort_list, 2732c66ac9dbSNicholas Bellinger int type, 2733c66ac9dbSNicholas Bellinger int scope, 273433ce6a87SAndy Grover enum preempt_type preempt_type) 2735c66ac9dbSNicholas Bellinger { 2736c66ac9dbSNicholas Bellinger struct se_node_acl *nacl = pr_reg->pr_reg_nacl; 27379ac8928eSChristoph Hellwig const struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; 2738c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 2739c66ac9dbSNicholas Bellinger 2740c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 2741d2843c17SAndy Grover core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 2742c66ac9dbSNicholas Bellinger /* 2743125d0119SHannes Reinecke * Do an implicit RELEASE of the existing reservation. 2744c66ac9dbSNicholas Bellinger */ 2745c66ac9dbSNicholas Bellinger if (dev->dev_pr_res_holder) 2746c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, nacl, 27476c3c9baaSNicholas Bellinger dev->dev_pr_res_holder, 0, 0); 2748c66ac9dbSNicholas Bellinger 2749c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = pr_reg; 2750c66ac9dbSNicholas Bellinger pr_reg->pr_res_holder = 1; 2751c66ac9dbSNicholas Bellinger pr_reg->pr_res_type = type; 2752c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope = scope; 2753c66ac9dbSNicholas Bellinger 27546708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: PREEMPT%s created new" 2755c66ac9dbSNicholas Bellinger " reservation holder TYPE: %s ALL_TG_PT: %d\n", 275633ce6a87SAndy Grover tfo->get_fabric_name(), (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : "", 2757c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(type), 2758c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); 27596708bb27SAndy Grover pr_debug("SPC-3 PR [%s] PREEMPT%s from Node: %s%s\n", 276033ce6a87SAndy Grover tfo->get_fabric_name(), (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : "", 2761d2843c17SAndy Grover nacl->initiatorname, i_buf); 2762c66ac9dbSNicholas Bellinger /* 2763c66ac9dbSNicholas Bellinger * For PREEMPT_AND_ABORT, add the preempting reservation's 2764c66ac9dbSNicholas Bellinger * struct t10_pr_registration to the list that will be compared 2765c66ac9dbSNicholas Bellinger * against received CDBs.. 2766c66ac9dbSNicholas Bellinger */ 2767c66ac9dbSNicholas Bellinger if (preempt_and_abort_list) 2768c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg->pr_reg_abort_list, 2769c66ac9dbSNicholas Bellinger preempt_and_abort_list); 2770c66ac9dbSNicholas Bellinger } 2771c66ac9dbSNicholas Bellinger 2772c66ac9dbSNicholas Bellinger static void core_scsi3_release_preempt_and_abort( 2773c66ac9dbSNicholas Bellinger struct list_head *preempt_and_abort_list, 2774c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg_holder) 2775c66ac9dbSNicholas Bellinger { 2776c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp; 2777c66ac9dbSNicholas Bellinger 2778c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, preempt_and_abort_list, 2779c66ac9dbSNicholas Bellinger pr_reg_abort_list) { 2780c66ac9dbSNicholas Bellinger 2781c66ac9dbSNicholas Bellinger list_del(&pr_reg->pr_reg_abort_list); 2782c66ac9dbSNicholas Bellinger if (pr_reg_holder == pr_reg) 2783c66ac9dbSNicholas Bellinger continue; 2784c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_holder) { 27856708bb27SAndy Grover pr_warn("pr_reg->pr_res_holder still set\n"); 2786c66ac9dbSNicholas Bellinger continue; 2787c66ac9dbSNicholas Bellinger } 2788c66ac9dbSNicholas Bellinger 2789c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve = NULL; 2790c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = NULL; 2791c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 2792c66ac9dbSNicholas Bellinger } 2793c66ac9dbSNicholas Bellinger } 2794c66ac9dbSNicholas Bellinger 2795de103c93SChristoph Hellwig static sense_reason_t 2796de103c93SChristoph Hellwig core_scsi3_pro_preempt(struct se_cmd *cmd, int type, int scope, u64 res_key, 279733ce6a87SAndy Grover u64 sa_res_key, enum preempt_type preempt_type) 2798c66ac9dbSNicholas Bellinger { 27995951146dSAndy Grover struct se_device *dev = cmd->se_dev; 2800c66ac9dbSNicholas Bellinger struct se_node_acl *pr_reg_nacl; 2801e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 2802d0f474e5SRoland Dreier LIST_HEAD(preempt_and_abort_list); 2803c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder; 28040fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 2805c66ac9dbSNicholas Bellinger u32 pr_res_mapped_lun = 0; 2806b6932ee3SSteven Allen int all_reg = 0, calling_it_nexus = 0; 2807b6932ee3SSteven Allen bool sa_res_key_unmatched = sa_res_key != 0; 2808de103c93SChristoph Hellwig int prh_type = 0, prh_scope = 0; 2809c66ac9dbSNicholas Bellinger 2810de103c93SChristoph Hellwig if (!se_sess) 2811de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2812c66ac9dbSNicholas Bellinger 28135951146dSAndy Grover pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, 2814c66ac9dbSNicholas Bellinger se_sess); 28156708bb27SAndy Grover if (!pr_reg_n) { 28166708bb27SAndy Grover pr_err("SPC-3 PR: Unable to locate" 2817c66ac9dbSNicholas Bellinger " PR_REGISTERED *pr_reg for PREEMPT%s\n", 281833ce6a87SAndy Grover (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : ""); 2819de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 2820c66ac9dbSNicholas Bellinger } 2821c66ac9dbSNicholas Bellinger if (pr_reg_n->pr_res_key != res_key) { 2822c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 2823de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 2824c66ac9dbSNicholas Bellinger } 2825c66ac9dbSNicholas Bellinger if (scope != PR_SCOPE_LU_SCOPE) { 28266708bb27SAndy Grover pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope); 2827c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 2828de103c93SChristoph Hellwig return TCM_INVALID_PARAMETER_LIST; 2829c66ac9dbSNicholas Bellinger } 2830c66ac9dbSNicholas Bellinger 2831c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 2832c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 2833c66ac9dbSNicholas Bellinger if (pr_res_holder && 2834c66ac9dbSNicholas Bellinger ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 2835c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG))) 2836c66ac9dbSNicholas Bellinger all_reg = 1; 2837c66ac9dbSNicholas Bellinger 28386708bb27SAndy Grover if (!all_reg && !sa_res_key) { 2839c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2840c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 2841de103c93SChristoph Hellwig return TCM_INVALID_PARAMETER_LIST; 2842c66ac9dbSNicholas Bellinger } 2843c66ac9dbSNicholas Bellinger /* 2844c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.11.4.4 Removing Registrations: 2845c66ac9dbSNicholas Bellinger * 2846c66ac9dbSNicholas Bellinger * If the SERVICE ACTION RESERVATION KEY field does not identify a 2847c66ac9dbSNicholas Bellinger * persistent reservation holder or there is no persistent reservation 2848c66ac9dbSNicholas Bellinger * holder (i.e., there is no persistent reservation), then the device 2849c66ac9dbSNicholas Bellinger * server shall perform a preempt by doing the following in an 2850c66ac9dbSNicholas Bellinger * uninterrupted series of actions. (See below..) 2851c66ac9dbSNicholas Bellinger */ 28526708bb27SAndy Grover if (!pr_res_holder || (pr_res_holder->pr_res_key != sa_res_key)) { 2853c66ac9dbSNicholas Bellinger /* 2854c66ac9dbSNicholas Bellinger * No existing or SA Reservation Key matching reservations.. 2855c66ac9dbSNicholas Bellinger * 2856c66ac9dbSNicholas Bellinger * PROUT SA PREEMPT with All Registrant type reservations are 2857c66ac9dbSNicholas Bellinger * allowed to be processed without a matching SA Reservation Key 2858c66ac9dbSNicholas Bellinger */ 2859c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 2860c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 2861c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 2862c66ac9dbSNicholas Bellinger /* 2863c66ac9dbSNicholas Bellinger * Removing of registrations in non all registrants 2864c66ac9dbSNicholas Bellinger * type reservations without a matching SA reservation 2865c66ac9dbSNicholas Bellinger * key. 2866c66ac9dbSNicholas Bellinger * 2867c66ac9dbSNicholas Bellinger * a) Remove the registrations for all I_T nexuses 2868c66ac9dbSNicholas Bellinger * specified by the SERVICE ACTION RESERVATION KEY 2869c66ac9dbSNicholas Bellinger * field; 2870c66ac9dbSNicholas Bellinger * b) Ignore the contents of the SCOPE and TYPE fields; 2871c66ac9dbSNicholas Bellinger * c) Process tasks as defined in 5.7.1; and 2872c66ac9dbSNicholas Bellinger * d) Establish a unit attention condition for the 2873c66ac9dbSNicholas Bellinger * initiator port associated with every I_T nexus 2874c66ac9dbSNicholas Bellinger * that lost its registration other than the I_T 2875c66ac9dbSNicholas Bellinger * nexus on which the PERSISTENT RESERVE OUT command 2876c66ac9dbSNicholas Bellinger * was received, with the additional sense code set 2877c66ac9dbSNicholas Bellinger * to REGISTRATIONS PREEMPTED. 2878c66ac9dbSNicholas Bellinger */ 28796708bb27SAndy Grover if (!all_reg) { 2880c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_key != sa_res_key) 2881c66ac9dbSNicholas Bellinger continue; 2882b6932ee3SSteven Allen sa_res_key_unmatched = false; 2883c66ac9dbSNicholas Bellinger 2884c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 2885c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 2886c66ac9dbSNicholas Bellinger pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; 2887c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, 288833ce6a87SAndy Grover (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : 2889c66ac9dbSNicholas Bellinger NULL, calling_it_nexus); 2890c66ac9dbSNicholas Bellinger } else { 2891c66ac9dbSNicholas Bellinger /* 2892c66ac9dbSNicholas Bellinger * Case for any existing all registrants type 2893c66ac9dbSNicholas Bellinger * reservation, follow logic in spc4r17 section 2894c66ac9dbSNicholas Bellinger * 5.7.11.4 Preempting, Table 52 and Figure 7. 2895c66ac9dbSNicholas Bellinger * 2896c66ac9dbSNicholas Bellinger * For a ZERO SA Reservation key, release 2897125d0119SHannes Reinecke * all other registrations and do an implicit 2898c66ac9dbSNicholas Bellinger * release of active persistent reservation. 2899c66ac9dbSNicholas Bellinger * 2900c66ac9dbSNicholas Bellinger * For a non-ZERO SA Reservation key, only 2901c66ac9dbSNicholas Bellinger * release the matching reservation key from 2902c66ac9dbSNicholas Bellinger * registrations. 2903c66ac9dbSNicholas Bellinger */ 2904c66ac9dbSNicholas Bellinger if ((sa_res_key) && 2905c66ac9dbSNicholas Bellinger (pr_reg->pr_res_key != sa_res_key)) 2906c66ac9dbSNicholas Bellinger continue; 2907b6932ee3SSteven Allen sa_res_key_unmatched = false; 2908c66ac9dbSNicholas Bellinger 2909c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 2910c66ac9dbSNicholas Bellinger if (calling_it_nexus) 2911c66ac9dbSNicholas Bellinger continue; 2912c66ac9dbSNicholas Bellinger 2913c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 2914c66ac9dbSNicholas Bellinger pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; 2915c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, 291633ce6a87SAndy Grover (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : 2917c66ac9dbSNicholas Bellinger NULL, 0); 2918c66ac9dbSNicholas Bellinger } 29196708bb27SAndy Grover if (!calling_it_nexus) 2920c66ac9dbSNicholas Bellinger core_scsi3_ua_allocate(pr_reg_nacl, 2921c66ac9dbSNicholas Bellinger pr_res_mapped_lun, 0x2A, 29229e08e34eSMarco Sanvido ASCQ_2AH_REGISTRATIONS_PREEMPTED); 2923c66ac9dbSNicholas Bellinger } 2924c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 2925c66ac9dbSNicholas Bellinger /* 2926c66ac9dbSNicholas Bellinger * If a PERSISTENT RESERVE OUT with a PREEMPT service action or 2927c66ac9dbSNicholas Bellinger * a PREEMPT AND ABORT service action sets the SERVICE ACTION 2928c66ac9dbSNicholas Bellinger * RESERVATION KEY field to a value that does not match any 2929c66ac9dbSNicholas Bellinger * registered reservation key, then the device server shall 2930c66ac9dbSNicholas Bellinger * complete the command with RESERVATION CONFLICT status. 2931c66ac9dbSNicholas Bellinger */ 2932b6932ee3SSteven Allen if (sa_res_key_unmatched) { 2933c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2934c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 2935de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 2936c66ac9dbSNicholas Bellinger } 2937c66ac9dbSNicholas Bellinger /* 2938c66ac9dbSNicholas Bellinger * For an existing all registrants type reservation 2939c66ac9dbSNicholas Bellinger * with a zero SA rservation key, preempt the existing 2940c66ac9dbSNicholas Bellinger * reservation with the new PR type and scope. 2941c66ac9dbSNicholas Bellinger */ 2942c66ac9dbSNicholas Bellinger if (pr_res_holder && all_reg && !(sa_res_key)) { 2943c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_preempt(dev, pr_reg_n, 294433ce6a87SAndy Grover (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : NULL, 294533ce6a87SAndy Grover type, scope, preempt_type); 2946c66ac9dbSNicholas Bellinger 294733ce6a87SAndy Grover if (preempt_type == PREEMPT_AND_ABORT) 2948c66ac9dbSNicholas Bellinger core_scsi3_release_preempt_and_abort( 2949c66ac9dbSNicholas Bellinger &preempt_and_abort_list, pr_reg_n); 2950c66ac9dbSNicholas Bellinger } 2951c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2952c66ac9dbSNicholas Bellinger 2953459f213bSAndy Grover if (pr_tmpl->pr_aptpl_active) 2954459f213bSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, true); 2955c66ac9dbSNicholas Bellinger 2956c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 29575951146dSAndy Grover core_scsi3_pr_generation(cmd->se_dev); 2958c66ac9dbSNicholas Bellinger return 0; 2959c66ac9dbSNicholas Bellinger } 2960c66ac9dbSNicholas Bellinger /* 2961c66ac9dbSNicholas Bellinger * The PREEMPTing SA reservation key matches that of the 2962c66ac9dbSNicholas Bellinger * existing persistent reservation, first, we check if 2963c66ac9dbSNicholas Bellinger * we are preempting our own reservation. 2964c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.11.4.3 Preempting 2965c66ac9dbSNicholas Bellinger * persistent reservations and registration handling 2966c66ac9dbSNicholas Bellinger * 2967c66ac9dbSNicholas Bellinger * If an all registrants persistent reservation is not 2968c66ac9dbSNicholas Bellinger * present, it is not an error for the persistent 2969c66ac9dbSNicholas Bellinger * reservation holder to preempt itself (i.e., a 2970c66ac9dbSNicholas Bellinger * PERSISTENT RESERVE OUT with a PREEMPT service action 2971c66ac9dbSNicholas Bellinger * or a PREEMPT AND ABORT service action with the 2972c66ac9dbSNicholas Bellinger * SERVICE ACTION RESERVATION KEY value equal to the 2973c66ac9dbSNicholas Bellinger * persistent reservation holder's reservation key that 2974c66ac9dbSNicholas Bellinger * is received from the persistent reservation holder). 2975c66ac9dbSNicholas Bellinger * In that case, the device server shall establish the 2976c66ac9dbSNicholas Bellinger * new persistent reservation and maintain the 2977c66ac9dbSNicholas Bellinger * registration. 2978c66ac9dbSNicholas Bellinger */ 2979c66ac9dbSNicholas Bellinger prh_type = pr_res_holder->pr_res_type; 2980c66ac9dbSNicholas Bellinger prh_scope = pr_res_holder->pr_res_scope; 2981c66ac9dbSNicholas Bellinger /* 2982c66ac9dbSNicholas Bellinger * If the SERVICE ACTION RESERVATION KEY field identifies a 2983c66ac9dbSNicholas Bellinger * persistent reservation holder (see 5.7.10), the device 2984c66ac9dbSNicholas Bellinger * server shall perform a preempt by doing the following as 2985c66ac9dbSNicholas Bellinger * an uninterrupted series of actions: 2986c66ac9dbSNicholas Bellinger * 2987c66ac9dbSNicholas Bellinger * a) Release the persistent reservation for the holder 2988c66ac9dbSNicholas Bellinger * identified by the SERVICE ACTION RESERVATION KEY field; 2989c66ac9dbSNicholas Bellinger */ 2990c66ac9dbSNicholas Bellinger if (pr_reg_n != pr_res_holder) 2991c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, 2992c66ac9dbSNicholas Bellinger pr_res_holder->pr_reg_nacl, 29936c3c9baaSNicholas Bellinger dev->dev_pr_res_holder, 0, 0); 2994c66ac9dbSNicholas Bellinger /* 2995c66ac9dbSNicholas Bellinger * b) Remove the registrations for all I_T nexuses identified 2996c66ac9dbSNicholas Bellinger * by the SERVICE ACTION RESERVATION KEY field, except the 2997c66ac9dbSNicholas Bellinger * I_T nexus that is being used for the PERSISTENT RESERVE 2998c66ac9dbSNicholas Bellinger * OUT command. If an all registrants persistent reservation 2999c66ac9dbSNicholas Bellinger * is present and the SERVICE ACTION RESERVATION KEY field 3000c66ac9dbSNicholas Bellinger * is set to zero, then all registrations shall be removed 3001c66ac9dbSNicholas Bellinger * except for that of the I_T nexus that is being used for 3002c66ac9dbSNicholas Bellinger * the PERSISTENT RESERVE OUT command; 3003c66ac9dbSNicholas Bellinger */ 3004c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 3005c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 3006c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 3007c66ac9dbSNicholas Bellinger 3008c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 3009c66ac9dbSNicholas Bellinger if (calling_it_nexus) 3010c66ac9dbSNicholas Bellinger continue; 3011c66ac9dbSNicholas Bellinger 3012c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_key != sa_res_key) 3013c66ac9dbSNicholas Bellinger continue; 3014c66ac9dbSNicholas Bellinger 3015c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 3016c66ac9dbSNicholas Bellinger pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; 3017c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, 301833ce6a87SAndy Grover (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : NULL, 3019c66ac9dbSNicholas Bellinger calling_it_nexus); 3020c66ac9dbSNicholas Bellinger /* 3021c66ac9dbSNicholas Bellinger * e) Establish a unit attention condition for the initiator 3022c66ac9dbSNicholas Bellinger * port associated with every I_T nexus that lost its 3023c66ac9dbSNicholas Bellinger * persistent reservation and/or registration, with the 3024c66ac9dbSNicholas Bellinger * additional sense code set to REGISTRATIONS PREEMPTED; 3025c66ac9dbSNicholas Bellinger */ 3026c66ac9dbSNicholas Bellinger core_scsi3_ua_allocate(pr_reg_nacl, pr_res_mapped_lun, 0x2A, 30279e08e34eSMarco Sanvido ASCQ_2AH_REGISTRATIONS_PREEMPTED); 3028c66ac9dbSNicholas Bellinger } 3029c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 3030c66ac9dbSNicholas Bellinger /* 3031c66ac9dbSNicholas Bellinger * c) Establish a persistent reservation for the preempting 3032c66ac9dbSNicholas Bellinger * I_T nexus using the contents of the SCOPE and TYPE fields; 3033c66ac9dbSNicholas Bellinger */ 3034c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_preempt(dev, pr_reg_n, 303533ce6a87SAndy Grover (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : NULL, 303633ce6a87SAndy Grover type, scope, preempt_type); 3037c66ac9dbSNicholas Bellinger /* 3038c66ac9dbSNicholas Bellinger * d) Process tasks as defined in 5.7.1; 3039c66ac9dbSNicholas Bellinger * e) See above.. 3040c66ac9dbSNicholas Bellinger * f) If the type or scope has changed, then for every I_T nexus 3041c66ac9dbSNicholas Bellinger * whose reservation key was not removed, except for the I_T 3042c66ac9dbSNicholas Bellinger * nexus on which the PERSISTENT RESERVE OUT command was 3043c66ac9dbSNicholas Bellinger * received, the device server shall establish a unit 3044c66ac9dbSNicholas Bellinger * attention condition for the initiator port associated with 3045c66ac9dbSNicholas Bellinger * that I_T nexus, with the additional sense code set to 3046c66ac9dbSNicholas Bellinger * RESERVATIONS RELEASED. If the type or scope have not 3047c66ac9dbSNicholas Bellinger * changed, then no unit attention condition(s) shall be 3048c66ac9dbSNicholas Bellinger * established for this reason. 3049c66ac9dbSNicholas Bellinger */ 3050c66ac9dbSNicholas Bellinger if ((prh_type != type) || (prh_scope != scope)) { 3051c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 3052c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 3053c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 3054c66ac9dbSNicholas Bellinger 3055c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 3056c66ac9dbSNicholas Bellinger if (calling_it_nexus) 3057c66ac9dbSNicholas Bellinger continue; 3058c66ac9dbSNicholas Bellinger 3059c66ac9dbSNicholas Bellinger core_scsi3_ua_allocate(pr_reg->pr_reg_nacl, 3060c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun, 0x2A, 3061c66ac9dbSNicholas Bellinger ASCQ_2AH_RESERVATIONS_RELEASED); 3062c66ac9dbSNicholas Bellinger } 3063c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 3064c66ac9dbSNicholas Bellinger } 3065c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3066c66ac9dbSNicholas Bellinger /* 3067c66ac9dbSNicholas Bellinger * Call LUN_RESET logic upon list of struct t10_pr_registration, 3068c66ac9dbSNicholas Bellinger * All received CDBs for the matching existing reservation and 3069c66ac9dbSNicholas Bellinger * registrations undergo ABORT_TASK logic. 3070c66ac9dbSNicholas Bellinger * 3071c66ac9dbSNicholas Bellinger * From there, core_scsi3_release_preempt_and_abort() will 3072c66ac9dbSNicholas Bellinger * release every registration in the list (which have already 3073c66ac9dbSNicholas Bellinger * been removed from the primary pr_reg list), except the 3074c66ac9dbSNicholas Bellinger * new persistent reservation holder, the calling Initiator Port. 3075c66ac9dbSNicholas Bellinger */ 307633ce6a87SAndy Grover if (preempt_type == PREEMPT_AND_ABORT) { 3077c66ac9dbSNicholas Bellinger core_tmr_lun_reset(dev, NULL, &preempt_and_abort_list, cmd); 3078c66ac9dbSNicholas Bellinger core_scsi3_release_preempt_and_abort(&preempt_and_abort_list, 3079c66ac9dbSNicholas Bellinger pr_reg_n); 3080c66ac9dbSNicholas Bellinger } 3081c66ac9dbSNicholas Bellinger 3082459f213bSAndy Grover if (pr_tmpl->pr_aptpl_active) 3083459f213bSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, true); 3084c66ac9dbSNicholas Bellinger 3085c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 30865951146dSAndy Grover core_scsi3_pr_generation(cmd->se_dev); 3087c66ac9dbSNicholas Bellinger return 0; 3088c66ac9dbSNicholas Bellinger } 3089c66ac9dbSNicholas Bellinger 3090de103c93SChristoph Hellwig static sense_reason_t 3091de103c93SChristoph Hellwig core_scsi3_emulate_pro_preempt(struct se_cmd *cmd, int type, int scope, 309233ce6a87SAndy Grover u64 res_key, u64 sa_res_key, enum preempt_type preempt_type) 3093c66ac9dbSNicholas Bellinger { 3094c66ac9dbSNicholas Bellinger switch (type) { 3095c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE: 3096c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS: 3097c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: 3098c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: 3099c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: 3100c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: 3101de103c93SChristoph Hellwig return core_scsi3_pro_preempt(cmd, type, scope, res_key, 310233ce6a87SAndy Grover sa_res_key, preempt_type); 3103c66ac9dbSNicholas Bellinger default: 31046708bb27SAndy Grover pr_err("SPC-3 PR: Unknown Service Action PREEMPT%s" 310533ce6a87SAndy Grover " Type: 0x%02x\n", (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : "", type); 3106de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 3107c66ac9dbSNicholas Bellinger } 3108c66ac9dbSNicholas Bellinger } 3109c66ac9dbSNicholas Bellinger 3110c66ac9dbSNicholas Bellinger 3111de103c93SChristoph Hellwig static sense_reason_t 3112de103c93SChristoph Hellwig core_scsi3_emulate_pro_register_and_move(struct se_cmd *cmd, u64 res_key, 3113de103c93SChristoph Hellwig u64 sa_res_key, int aptpl, int unreg) 3114c66ac9dbSNicholas Bellinger { 3115e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 31165951146dSAndy Grover struct se_device *dev = cmd->se_dev; 311728168905SJörn Engel struct se_dev_entry *dest_se_deve = NULL; 3118e3d6f909SAndy Grover struct se_lun *se_lun = cmd->se_lun; 3119c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl, *pr_reg_nacl, *dest_node_acl = NULL; 3120c66ac9dbSNicholas Bellinger struct se_port *se_port; 3121c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg, *dest_se_tpg = NULL; 31229ac8928eSChristoph Hellwig const struct target_core_fabric_ops *dest_tf_ops = NULL, *tf_ops; 3123c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_res_holder, *dest_pr_reg; 31240fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 312505d1c7c0SAndy Grover unsigned char *buf; 3126c66ac9dbSNicholas Bellinger unsigned char *initiator_str; 312713ba564cSJulia Lawall char *iport_ptr = NULL, i_buf[PR_REG_ISID_ID_LEN]; 3128c66ac9dbSNicholas Bellinger u32 tid_len, tmp_tid_len; 3129d2843c17SAndy Grover int new_reg = 0, type, scope, matching_iname; 3130de103c93SChristoph Hellwig sense_reason_t ret; 3131c66ac9dbSNicholas Bellinger unsigned short rtpi; 3132c66ac9dbSNicholas Bellinger unsigned char proto_ident; 3133c66ac9dbSNicholas Bellinger 31346708bb27SAndy Grover if (!se_sess || !se_lun) { 31356708bb27SAndy Grover pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); 3136de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3137c66ac9dbSNicholas Bellinger } 3138de103c93SChristoph Hellwig 3139c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 3140c66ac9dbSNicholas Bellinger se_tpg = se_sess->se_tpg; 3141e3d6f909SAndy Grover tf_ops = se_tpg->se_tpg_tfo; 3142c66ac9dbSNicholas Bellinger /* 3143c66ac9dbSNicholas Bellinger * Follow logic from spc4r17 Section 5.7.8, Table 50 -- 3144c66ac9dbSNicholas Bellinger * Register behaviors for a REGISTER AND MOVE service action 3145c66ac9dbSNicholas Bellinger * 3146c66ac9dbSNicholas Bellinger * Locate the existing *pr_reg via struct se_node_acl pointers 3147c66ac9dbSNicholas Bellinger */ 31485951146dSAndy Grover pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, 3149c66ac9dbSNicholas Bellinger se_sess); 31506708bb27SAndy Grover if (!pr_reg) { 31516708bb27SAndy Grover pr_err("SPC-3 PR: Unable to locate PR_REGISTERED" 3152c66ac9dbSNicholas Bellinger " *pr_reg for REGISTER_AND_MOVE\n"); 3153de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3154c66ac9dbSNicholas Bellinger } 3155c66ac9dbSNicholas Bellinger /* 3156c66ac9dbSNicholas Bellinger * The provided reservation key much match the existing reservation key 3157c66ac9dbSNicholas Bellinger * provided during this initiator's I_T nexus registration. 3158c66ac9dbSNicholas Bellinger */ 3159c66ac9dbSNicholas Bellinger if (res_key != pr_reg->pr_res_key) { 31606708bb27SAndy Grover pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received" 3161c66ac9dbSNicholas Bellinger " res_key: 0x%016Lx does not match existing SA REGISTER" 3162c66ac9dbSNicholas Bellinger " res_key: 0x%016Lx\n", res_key, pr_reg->pr_res_key); 3163de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 3164de103c93SChristoph Hellwig goto out_put_pr_reg; 3165c66ac9dbSNicholas Bellinger } 3166c66ac9dbSNicholas Bellinger /* 3167c66ac9dbSNicholas Bellinger * The service active reservation key needs to be non zero 3168c66ac9dbSNicholas Bellinger */ 31696708bb27SAndy Grover if (!sa_res_key) { 31706708bb27SAndy Grover pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received zero" 3171c66ac9dbSNicholas Bellinger " sa_res_key\n"); 3172de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3173de103c93SChristoph Hellwig goto out_put_pr_reg; 3174c66ac9dbSNicholas Bellinger } 317505d1c7c0SAndy Grover 3176c66ac9dbSNicholas Bellinger /* 3177c66ac9dbSNicholas Bellinger * Determine the Relative Target Port Identifier where the reservation 3178c66ac9dbSNicholas Bellinger * will be moved to for the TransportID containing SCSI initiator WWN 3179c66ac9dbSNicholas Bellinger * information. 3180c66ac9dbSNicholas Bellinger */ 31814949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3182de103c93SChristoph Hellwig if (!buf) { 3183de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3184de103c93SChristoph Hellwig goto out_put_pr_reg; 3185de103c93SChristoph Hellwig } 3186de103c93SChristoph Hellwig 3187c66ac9dbSNicholas Bellinger rtpi = (buf[18] & 0xff) << 8; 3188c66ac9dbSNicholas Bellinger rtpi |= buf[19] & 0xff; 3189c66ac9dbSNicholas Bellinger tid_len = (buf[20] & 0xff) << 24; 3190c66ac9dbSNicholas Bellinger tid_len |= (buf[21] & 0xff) << 16; 3191c66ac9dbSNicholas Bellinger tid_len |= (buf[22] & 0xff) << 8; 3192c66ac9dbSNicholas Bellinger tid_len |= buf[23] & 0xff; 31934949314cSAndy Grover transport_kunmap_data_sg(cmd); 319405d1c7c0SAndy Grover buf = NULL; 3195c66ac9dbSNicholas Bellinger 3196c66ac9dbSNicholas Bellinger if ((tid_len + 24) != cmd->data_length) { 31976708bb27SAndy Grover pr_err("SPC-3 PR: Illegal tid_len: %u + 24 byte header" 3198c66ac9dbSNicholas Bellinger " does not equal CDB data_length: %u\n", tid_len, 3199c66ac9dbSNicholas Bellinger cmd->data_length); 3200de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3201de103c93SChristoph Hellwig goto out_put_pr_reg; 3202c66ac9dbSNicholas Bellinger } 3203c66ac9dbSNicholas Bellinger 3204c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 3205c66ac9dbSNicholas Bellinger list_for_each_entry(se_port, &dev->dev_sep_list, sep_list) { 3206c66ac9dbSNicholas Bellinger if (se_port->sep_rtpi != rtpi) 3207c66ac9dbSNicholas Bellinger continue; 3208c66ac9dbSNicholas Bellinger dest_se_tpg = se_port->sep_tpg; 32096708bb27SAndy Grover if (!dest_se_tpg) 3210c66ac9dbSNicholas Bellinger continue; 3211e3d6f909SAndy Grover dest_tf_ops = dest_se_tpg->se_tpg_tfo; 32126708bb27SAndy Grover if (!dest_tf_ops) 3213c66ac9dbSNicholas Bellinger continue; 3214c66ac9dbSNicholas Bellinger 321533940d09SJoern Engel atomic_inc_mb(&dest_se_tpg->tpg_pr_ref_count); 3216c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 3217c66ac9dbSNicholas Bellinger 3218de103c93SChristoph Hellwig if (core_scsi3_tpg_depend_item(dest_se_tpg)) { 32196708bb27SAndy Grover pr_err("core_scsi3_tpg_depend_item() failed" 3220c66ac9dbSNicholas Bellinger " for dest_se_tpg\n"); 322133940d09SJoern Engel atomic_dec_mb(&dest_se_tpg->tpg_pr_ref_count); 3222de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3223de103c93SChristoph Hellwig goto out_put_pr_reg; 3224c66ac9dbSNicholas Bellinger } 3225c66ac9dbSNicholas Bellinger 3226c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 3227c66ac9dbSNicholas Bellinger break; 3228c66ac9dbSNicholas Bellinger } 3229c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 3230c66ac9dbSNicholas Bellinger 32316708bb27SAndy Grover if (!dest_se_tpg || !dest_tf_ops) { 32326708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate" 3233c66ac9dbSNicholas Bellinger " fabric ops from Relative Target Port Identifier:" 3234c66ac9dbSNicholas Bellinger " %hu\n", rtpi); 3235de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3236de103c93SChristoph Hellwig goto out_put_pr_reg; 3237c66ac9dbSNicholas Bellinger } 323805d1c7c0SAndy Grover 32394949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3240de103c93SChristoph Hellwig if (!buf) { 3241de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3242de103c93SChristoph Hellwig goto out_put_pr_reg; 3243de103c93SChristoph Hellwig } 3244c66ac9dbSNicholas Bellinger proto_ident = (buf[24] & 0x0f); 32458b1e1244SAndy Grover 32466708bb27SAndy Grover pr_debug("SPC-3 PR REGISTER_AND_MOVE: Extracted Protocol Identifier:" 3247c66ac9dbSNicholas Bellinger " 0x%02x\n", proto_ident); 32488b1e1244SAndy Grover 3249c66ac9dbSNicholas Bellinger if (proto_ident != dest_tf_ops->get_fabric_proto_ident(dest_se_tpg)) { 32506708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: Received" 3251c66ac9dbSNicholas Bellinger " proto_ident: 0x%02x does not match ident: 0x%02x" 3252c66ac9dbSNicholas Bellinger " from fabric: %s\n", proto_ident, 3253c66ac9dbSNicholas Bellinger dest_tf_ops->get_fabric_proto_ident(dest_se_tpg), 3254c66ac9dbSNicholas Bellinger dest_tf_ops->get_fabric_name()); 3255de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3256c66ac9dbSNicholas Bellinger goto out; 3257c66ac9dbSNicholas Bellinger } 3258c66ac9dbSNicholas Bellinger if (dest_tf_ops->tpg_parse_pr_out_transport_id == NULL) { 32596708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: Fabric does not" 3260c66ac9dbSNicholas Bellinger " containg a valid tpg_parse_pr_out_transport_id" 3261c66ac9dbSNicholas Bellinger " function pointer\n"); 3262de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3263c66ac9dbSNicholas Bellinger goto out; 3264c66ac9dbSNicholas Bellinger } 3265c66ac9dbSNicholas Bellinger initiator_str = dest_tf_ops->tpg_parse_pr_out_transport_id(dest_se_tpg, 3266c66ac9dbSNicholas Bellinger (const char *)&buf[24], &tmp_tid_len, &iport_ptr); 32676708bb27SAndy Grover if (!initiator_str) { 32686708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate" 3269c66ac9dbSNicholas Bellinger " initiator_str from Transport ID\n"); 3270de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3271c66ac9dbSNicholas Bellinger goto out; 3272c66ac9dbSNicholas Bellinger } 3273c66ac9dbSNicholas Bellinger 32744949314cSAndy Grover transport_kunmap_data_sg(cmd); 327505d1c7c0SAndy Grover buf = NULL; 327605d1c7c0SAndy Grover 32776708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Extracted initiator %s identifier: %s" 3278c66ac9dbSNicholas Bellinger " %s\n", dest_tf_ops->get_fabric_name(), (iport_ptr != NULL) ? 3279c66ac9dbSNicholas Bellinger "port" : "device", initiator_str, (iport_ptr != NULL) ? 3280c66ac9dbSNicholas Bellinger iport_ptr : ""); 3281c66ac9dbSNicholas Bellinger /* 3282c66ac9dbSNicholas Bellinger * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service 3283c66ac9dbSNicholas Bellinger * action specifies a TransportID that is the same as the initiator port 3284c66ac9dbSNicholas Bellinger * of the I_T nexus for the command received, then the command shall 3285c66ac9dbSNicholas Bellinger * be terminated with CHECK CONDITION status, with the sense key set to 3286c66ac9dbSNicholas Bellinger * ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD 3287c66ac9dbSNicholas Bellinger * IN PARAMETER LIST. 3288c66ac9dbSNicholas Bellinger */ 3289c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 3290c66ac9dbSNicholas Bellinger matching_iname = (!strcmp(initiator_str, 3291c66ac9dbSNicholas Bellinger pr_reg_nacl->initiatorname)) ? 1 : 0; 32926708bb27SAndy Grover if (!matching_iname) 3293c66ac9dbSNicholas Bellinger goto after_iport_check; 3294c66ac9dbSNicholas Bellinger 32956708bb27SAndy Grover if (!iport_ptr || !pr_reg->isid_present_at_reg) { 32966708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s" 3297c66ac9dbSNicholas Bellinger " matches: %s on received I_T Nexus\n", initiator_str, 3298c66ac9dbSNicholas Bellinger pr_reg_nacl->initiatorname); 3299de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3300c66ac9dbSNicholas Bellinger goto out; 3301c66ac9dbSNicholas Bellinger } 33026708bb27SAndy Grover if (!strcmp(iport_ptr, pr_reg->pr_reg_isid)) { 33036708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s %s" 3304c66ac9dbSNicholas Bellinger " matches: %s %s on received I_T Nexus\n", 3305c66ac9dbSNicholas Bellinger initiator_str, iport_ptr, pr_reg_nacl->initiatorname, 3306c66ac9dbSNicholas Bellinger pr_reg->pr_reg_isid); 3307de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3308c66ac9dbSNicholas Bellinger goto out; 3309c66ac9dbSNicholas Bellinger } 3310c66ac9dbSNicholas Bellinger after_iport_check: 3311c66ac9dbSNicholas Bellinger /* 3312c66ac9dbSNicholas Bellinger * Locate the destination struct se_node_acl from the received Transport ID 3313c66ac9dbSNicholas Bellinger */ 331428638887SRoland Dreier spin_lock_irq(&dest_se_tpg->acl_node_lock); 3315c66ac9dbSNicholas Bellinger dest_node_acl = __core_tpg_get_initiator_node_acl(dest_se_tpg, 3316c66ac9dbSNicholas Bellinger initiator_str); 331733940d09SJoern Engel if (dest_node_acl) 331833940d09SJoern Engel atomic_inc_mb(&dest_node_acl->acl_pr_ref_count); 331928638887SRoland Dreier spin_unlock_irq(&dest_se_tpg->acl_node_lock); 3320c66ac9dbSNicholas Bellinger 33216708bb27SAndy Grover if (!dest_node_acl) { 33226708bb27SAndy Grover pr_err("Unable to locate %s dest_node_acl for" 3323c66ac9dbSNicholas Bellinger " TransportID%s\n", dest_tf_ops->get_fabric_name(), 3324c66ac9dbSNicholas Bellinger initiator_str); 3325de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3326c66ac9dbSNicholas Bellinger goto out; 3327c66ac9dbSNicholas Bellinger } 3328de103c93SChristoph Hellwig 3329de103c93SChristoph Hellwig if (core_scsi3_nodeacl_depend_item(dest_node_acl)) { 33306708bb27SAndy Grover pr_err("core_scsi3_nodeacl_depend_item() for" 3331c66ac9dbSNicholas Bellinger " dest_node_acl\n"); 333233940d09SJoern Engel atomic_dec_mb(&dest_node_acl->acl_pr_ref_count); 3333c66ac9dbSNicholas Bellinger dest_node_acl = NULL; 3334de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3335c66ac9dbSNicholas Bellinger goto out; 3336c66ac9dbSNicholas Bellinger } 33378b1e1244SAndy Grover 33386708bb27SAndy Grover pr_debug("SPC-3 PR REGISTER_AND_MOVE: Found %s dest_node_acl:" 3339c66ac9dbSNicholas Bellinger " %s from TransportID\n", dest_tf_ops->get_fabric_name(), 3340c66ac9dbSNicholas Bellinger dest_node_acl->initiatorname); 33418b1e1244SAndy Grover 3342c66ac9dbSNicholas Bellinger /* 3343c66ac9dbSNicholas Bellinger * Locate the struct se_dev_entry pointer for the matching RELATIVE TARGET 3344c66ac9dbSNicholas Bellinger * PORT IDENTIFIER. 3345c66ac9dbSNicholas Bellinger */ 3346c66ac9dbSNicholas Bellinger dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, rtpi); 33476708bb27SAndy Grover if (!dest_se_deve) { 33486708bb27SAndy Grover pr_err("Unable to locate %s dest_se_deve from RTPI:" 3349c66ac9dbSNicholas Bellinger " %hu\n", dest_tf_ops->get_fabric_name(), rtpi); 3350de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3351c66ac9dbSNicholas Bellinger goto out; 3352c66ac9dbSNicholas Bellinger } 3353c66ac9dbSNicholas Bellinger 3354de103c93SChristoph Hellwig if (core_scsi3_lunacl_depend_item(dest_se_deve)) { 33556708bb27SAndy Grover pr_err("core_scsi3_lunacl_depend_item() failed\n"); 335633940d09SJoern Engel atomic_dec_mb(&dest_se_deve->pr_ref_count); 3357c66ac9dbSNicholas Bellinger dest_se_deve = NULL; 3358de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3359c66ac9dbSNicholas Bellinger goto out; 3360c66ac9dbSNicholas Bellinger } 33618b1e1244SAndy Grover 33626708bb27SAndy Grover pr_debug("SPC-3 PR REGISTER_AND_MOVE: Located %s node %s LUN" 3363c66ac9dbSNicholas Bellinger " ACL for dest_se_deve->mapped_lun: %u\n", 3364c66ac9dbSNicholas Bellinger dest_tf_ops->get_fabric_name(), dest_node_acl->initiatorname, 3365c66ac9dbSNicholas Bellinger dest_se_deve->mapped_lun); 33668b1e1244SAndy Grover 3367c66ac9dbSNicholas Bellinger /* 3368c66ac9dbSNicholas Bellinger * A persistent reservation needs to already existing in order to 3369c66ac9dbSNicholas Bellinger * successfully complete the REGISTER_AND_MOVE service action.. 3370c66ac9dbSNicholas Bellinger */ 3371c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 3372c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 33736708bb27SAndy Grover if (!pr_res_holder) { 33746708bb27SAndy Grover pr_warn("SPC-3 PR REGISTER_AND_MOVE: No reservation" 3375c66ac9dbSNicholas Bellinger " currently held\n"); 3376c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3377de103c93SChristoph Hellwig ret = TCM_INVALID_CDB_FIELD; 3378c66ac9dbSNicholas Bellinger goto out; 3379c66ac9dbSNicholas Bellinger } 3380c66ac9dbSNicholas Bellinger /* 3381c66ac9dbSNicholas Bellinger * The received on I_T Nexus must be the reservation holder. 3382c66ac9dbSNicholas Bellinger * 3383c66ac9dbSNicholas Bellinger * From spc4r17 section 5.7.8 Table 50 -- 3384c66ac9dbSNicholas Bellinger * Register behaviors for a REGISTER AND MOVE service action 3385c66ac9dbSNicholas Bellinger */ 3386e673dc92SIlias Tsitsimpis if (!is_reservation_holder(pr_res_holder, pr_reg)) { 33876708bb27SAndy Grover pr_warn("SPC-3 PR REGISTER_AND_MOVE: Calling I_T" 3388c66ac9dbSNicholas Bellinger " Nexus is not reservation holder\n"); 3389c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3390de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 3391c66ac9dbSNicholas Bellinger goto out; 3392c66ac9dbSNicholas Bellinger } 3393c66ac9dbSNicholas Bellinger /* 3394c66ac9dbSNicholas Bellinger * From spc4r17 section 5.7.8: registering and moving reservation 3395c66ac9dbSNicholas Bellinger * 3396c66ac9dbSNicholas Bellinger * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service 3397c66ac9dbSNicholas Bellinger * action is received and the established persistent reservation is a 3398c66ac9dbSNicholas Bellinger * Write Exclusive - All Registrants type or Exclusive Access - 3399c66ac9dbSNicholas Bellinger * All Registrants type reservation, then the command shall be completed 3400c66ac9dbSNicholas Bellinger * with RESERVATION CONFLICT status. 3401c66ac9dbSNicholas Bellinger */ 3402c66ac9dbSNicholas Bellinger if ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 3403c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { 34046708bb27SAndy Grover pr_warn("SPC-3 PR REGISTER_AND_MOVE: Unable to move" 3405c66ac9dbSNicholas Bellinger " reservation for type: %s\n", 3406c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_res_holder->pr_res_type)); 3407c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3408de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 3409c66ac9dbSNicholas Bellinger goto out; 3410c66ac9dbSNicholas Bellinger } 3411c66ac9dbSNicholas Bellinger pr_res_nacl = pr_res_holder->pr_reg_nacl; 3412c66ac9dbSNicholas Bellinger /* 3413c66ac9dbSNicholas Bellinger * b) Ignore the contents of the (received) SCOPE and TYPE fields; 3414c66ac9dbSNicholas Bellinger */ 3415c66ac9dbSNicholas Bellinger type = pr_res_holder->pr_res_type; 3416c66ac9dbSNicholas Bellinger scope = pr_res_holder->pr_res_type; 3417c66ac9dbSNicholas Bellinger /* 3418c66ac9dbSNicholas Bellinger * c) Associate the reservation key specified in the SERVICE ACTION 3419c66ac9dbSNicholas Bellinger * RESERVATION KEY field with the I_T nexus specified as the 3420c66ac9dbSNicholas Bellinger * destination of the register and move, where: 3421c66ac9dbSNicholas Bellinger * A) The I_T nexus is specified by the TransportID and the 3422c66ac9dbSNicholas Bellinger * RELATIVE TARGET PORT IDENTIFIER field (see 6.14.4); and 3423c66ac9dbSNicholas Bellinger * B) Regardless of the TransportID format used, the association for 3424c66ac9dbSNicholas Bellinger * the initiator port is based on either the initiator port name 3425c66ac9dbSNicholas Bellinger * (see 3.1.71) on SCSI transport protocols where port names are 3426c66ac9dbSNicholas Bellinger * required or the initiator port identifier (see 3.1.70) on SCSI 3427c66ac9dbSNicholas Bellinger * transport protocols where port names are not required; 3428c66ac9dbSNicholas Bellinger * d) Register the reservation key specified in the SERVICE ACTION 3429c66ac9dbSNicholas Bellinger * RESERVATION KEY field; 3430c66ac9dbSNicholas Bellinger * e) Retain the reservation key specified in the SERVICE ACTION 3431c66ac9dbSNicholas Bellinger * RESERVATION KEY field and associated information; 3432c66ac9dbSNicholas Bellinger * 3433c66ac9dbSNicholas Bellinger * Also, It is not an error for a REGISTER AND MOVE service action to 3434c66ac9dbSNicholas Bellinger * register an I_T nexus that is already registered with the same 3435c66ac9dbSNicholas Bellinger * reservation key or a different reservation key. 3436c66ac9dbSNicholas Bellinger */ 3437c66ac9dbSNicholas Bellinger dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl, 3438c66ac9dbSNicholas Bellinger iport_ptr); 34396708bb27SAndy Grover if (!dest_pr_reg) { 3440de103c93SChristoph Hellwig if (core_scsi3_alloc_registration(cmd->se_dev, 3441c66ac9dbSNicholas Bellinger dest_node_acl, dest_se_deve, iport_ptr, 3442de103c93SChristoph Hellwig sa_res_key, 0, aptpl, 2, 1)) { 3443c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3444de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3445c66ac9dbSNicholas Bellinger goto out; 3446c66ac9dbSNicholas Bellinger } 3447c66ac9dbSNicholas Bellinger dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl, 3448c66ac9dbSNicholas Bellinger iport_ptr); 3449c66ac9dbSNicholas Bellinger new_reg = 1; 3450c66ac9dbSNicholas Bellinger } 3451c66ac9dbSNicholas Bellinger /* 3452c66ac9dbSNicholas Bellinger * f) Release the persistent reservation for the persistent reservation 3453c66ac9dbSNicholas Bellinger * holder (i.e., the I_T nexus on which the 3454c66ac9dbSNicholas Bellinger */ 3455c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, pr_res_nacl, 34566c3c9baaSNicholas Bellinger dev->dev_pr_res_holder, 0, 0); 3457c66ac9dbSNicholas Bellinger /* 3458c66ac9dbSNicholas Bellinger * g) Move the persistent reservation to the specified I_T nexus using 3459c66ac9dbSNicholas Bellinger * the same scope and type as the persistent reservation released in 3460c66ac9dbSNicholas Bellinger * item f); and 3461c66ac9dbSNicholas Bellinger */ 3462c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = dest_pr_reg; 3463c66ac9dbSNicholas Bellinger dest_pr_reg->pr_res_holder = 1; 3464c66ac9dbSNicholas Bellinger dest_pr_reg->pr_res_type = type; 3465c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope = scope; 3466d2843c17SAndy Grover core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 3467c66ac9dbSNicholas Bellinger /* 3468c66ac9dbSNicholas Bellinger * Increment PRGeneration for existing registrations.. 3469c66ac9dbSNicholas Bellinger */ 34706708bb27SAndy Grover if (!new_reg) 3471c66ac9dbSNicholas Bellinger dest_pr_reg->pr_res_generation = pr_tmpl->pr_generation++; 3472c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3473c66ac9dbSNicholas Bellinger 34746708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: REGISTER_AND_MOVE" 3475c66ac9dbSNicholas Bellinger " created new reservation holder TYPE: %s on object RTPI:" 3476c66ac9dbSNicholas Bellinger " %hu PRGeneration: 0x%08x\n", dest_tf_ops->get_fabric_name(), 3477c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(type), rtpi, 3478c66ac9dbSNicholas Bellinger dest_pr_reg->pr_res_generation); 34796708bb27SAndy Grover pr_debug("SPC-3 PR Successfully moved reservation from" 3480c66ac9dbSNicholas Bellinger " %s Fabric Node: %s%s -> %s Fabric Node: %s %s\n", 3481c66ac9dbSNicholas Bellinger tf_ops->get_fabric_name(), pr_reg_nacl->initiatorname, 3482d2843c17SAndy Grover i_buf, dest_tf_ops->get_fabric_name(), 3483c66ac9dbSNicholas Bellinger dest_node_acl->initiatorname, (iport_ptr != NULL) ? 3484c66ac9dbSNicholas Bellinger iport_ptr : ""); 3485c66ac9dbSNicholas Bellinger /* 3486c66ac9dbSNicholas Bellinger * It is now safe to release configfs group dependencies for destination 3487c66ac9dbSNicholas Bellinger * of Transport ID Initiator Device/Port Identifier 3488c66ac9dbSNicholas Bellinger */ 3489c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 3490c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 3491c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_se_tpg); 3492c66ac9dbSNicholas Bellinger /* 3493c66ac9dbSNicholas Bellinger * h) If the UNREG bit is set to one, unregister (see 5.7.11.3) the I_T 3494c66ac9dbSNicholas Bellinger * nexus on which PERSISTENT RESERVE OUT command was received. 3495c66ac9dbSNicholas Bellinger */ 3496c66ac9dbSNicholas Bellinger if (unreg) { 3497c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 3498c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, NULL, 1); 3499c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 3500c66ac9dbSNicholas Bellinger } else 3501c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 3502c66ac9dbSNicholas Bellinger 3503459f213bSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, aptpl); 3504c66ac9dbSNicholas Bellinger 35054949314cSAndy Grover transport_kunmap_data_sg(cmd); 350605d1c7c0SAndy Grover 3507c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(dest_pr_reg); 3508c66ac9dbSNicholas Bellinger return 0; 3509c66ac9dbSNicholas Bellinger out: 351005d1c7c0SAndy Grover if (buf) 35114949314cSAndy Grover transport_kunmap_data_sg(cmd); 3512c66ac9dbSNicholas Bellinger if (dest_se_deve) 3513c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 3514c66ac9dbSNicholas Bellinger if (dest_node_acl) 3515c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 3516c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_se_tpg); 3517de103c93SChristoph Hellwig 3518de103c93SChristoph Hellwig out_put_pr_reg: 3519c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 3520c66ac9dbSNicholas Bellinger return ret; 3521c66ac9dbSNicholas Bellinger } 3522c66ac9dbSNicholas Bellinger 3523c66ac9dbSNicholas Bellinger static unsigned long long core_scsi3_extract_reservation_key(unsigned char *cdb) 3524c66ac9dbSNicholas Bellinger { 3525c66ac9dbSNicholas Bellinger unsigned int __v1, __v2; 3526c66ac9dbSNicholas Bellinger 3527c66ac9dbSNicholas Bellinger __v1 = (cdb[0] << 24) | (cdb[1] << 16) | (cdb[2] << 8) | cdb[3]; 3528c66ac9dbSNicholas Bellinger __v2 = (cdb[4] << 24) | (cdb[5] << 16) | (cdb[6] << 8) | cdb[7]; 3529c66ac9dbSNicholas Bellinger 3530c66ac9dbSNicholas Bellinger return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; 3531c66ac9dbSNicholas Bellinger } 3532c66ac9dbSNicholas Bellinger 3533c66ac9dbSNicholas Bellinger /* 3534c66ac9dbSNicholas Bellinger * See spc4r17 section 6.14 Table 170 3535c66ac9dbSNicholas Bellinger */ 3536de103c93SChristoph Hellwig sense_reason_t 3537de103c93SChristoph Hellwig target_scsi3_emulate_pr_out(struct se_cmd *cmd) 3538c66ac9dbSNicholas Bellinger { 353992404e60SNicholas Bellinger struct se_device *dev = cmd->se_dev; 3540617c0e06SChristoph Hellwig unsigned char *cdb = &cmd->t_task_cdb[0]; 354105d1c7c0SAndy Grover unsigned char *buf; 3542c66ac9dbSNicholas Bellinger u64 res_key, sa_res_key; 3543c66ac9dbSNicholas Bellinger int sa, scope, type, aptpl; 3544c66ac9dbSNicholas Bellinger int spec_i_pt = 0, all_tg_pt = 0, unreg = 0; 3545de103c93SChristoph Hellwig sense_reason_t ret; 3546617c0e06SChristoph Hellwig 3547617c0e06SChristoph Hellwig /* 3548617c0e06SChristoph Hellwig * Following spc2r20 5.5.1 Reservations overview: 3549617c0e06SChristoph Hellwig * 3550617c0e06SChristoph Hellwig * If a logical unit has been reserved by any RESERVE command and is 3551617c0e06SChristoph Hellwig * still reserved by any initiator, all PERSISTENT RESERVE IN and all 3552617c0e06SChristoph Hellwig * PERSISTENT RESERVE OUT commands shall conflict regardless of 3553617c0e06SChristoph Hellwig * initiator or service action and shall terminate with a RESERVATION 3554617c0e06SChristoph Hellwig * CONFLICT status. 3555617c0e06SChristoph Hellwig */ 35560fd97ccfSChristoph Hellwig if (cmd->se_dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) { 3557617c0e06SChristoph Hellwig pr_err("Received PERSISTENT_RESERVE CDB while legacy" 3558617c0e06SChristoph Hellwig " SPC-2 reservation is held, returning" 3559617c0e06SChristoph Hellwig " RESERVATION_CONFLICT\n"); 3560de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 3561617c0e06SChristoph Hellwig } 3562617c0e06SChristoph Hellwig 3563c66ac9dbSNicholas Bellinger /* 3564c66ac9dbSNicholas Bellinger * FIXME: A NULL struct se_session pointer means an this is not coming from 3565c66ac9dbSNicholas Bellinger * a $FABRIC_MOD's nexus, but from internal passthrough ops. 3566c66ac9dbSNicholas Bellinger */ 3567de103c93SChristoph Hellwig if (!cmd->se_sess) 3568de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3569c66ac9dbSNicholas Bellinger 3570c66ac9dbSNicholas Bellinger if (cmd->data_length < 24) { 35716708bb27SAndy Grover pr_warn("SPC-PR: Received PR OUT parameter list" 3572c66ac9dbSNicholas Bellinger " length too small: %u\n", cmd->data_length); 3573de103c93SChristoph Hellwig return TCM_INVALID_PARAMETER_LIST; 3574c66ac9dbSNicholas Bellinger } 3575de103c93SChristoph Hellwig 3576c66ac9dbSNicholas Bellinger /* 3577c66ac9dbSNicholas Bellinger * From the PERSISTENT_RESERVE_OUT command descriptor block (CDB) 3578c66ac9dbSNicholas Bellinger */ 3579c66ac9dbSNicholas Bellinger sa = (cdb[1] & 0x1f); 3580c66ac9dbSNicholas Bellinger scope = (cdb[2] & 0xf0); 3581c66ac9dbSNicholas Bellinger type = (cdb[2] & 0x0f); 358205d1c7c0SAndy Grover 35834949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3584de103c93SChristoph Hellwig if (!buf) 3585de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3586de103c93SChristoph Hellwig 3587c66ac9dbSNicholas Bellinger /* 3588c66ac9dbSNicholas Bellinger * From PERSISTENT_RESERVE_OUT parameter list (payload) 3589c66ac9dbSNicholas Bellinger */ 3590c66ac9dbSNicholas Bellinger res_key = core_scsi3_extract_reservation_key(&buf[0]); 3591c66ac9dbSNicholas Bellinger sa_res_key = core_scsi3_extract_reservation_key(&buf[8]); 3592c66ac9dbSNicholas Bellinger /* 3593c66ac9dbSNicholas Bellinger * REGISTER_AND_MOVE uses a different SA parameter list containing 3594c66ac9dbSNicholas Bellinger * SCSI TransportIDs. 3595c66ac9dbSNicholas Bellinger */ 3596c66ac9dbSNicholas Bellinger if (sa != PRO_REGISTER_AND_MOVE) { 3597c66ac9dbSNicholas Bellinger spec_i_pt = (buf[20] & 0x08); 3598c66ac9dbSNicholas Bellinger all_tg_pt = (buf[20] & 0x04); 3599c66ac9dbSNicholas Bellinger aptpl = (buf[20] & 0x01); 3600c66ac9dbSNicholas Bellinger } else { 3601c66ac9dbSNicholas Bellinger aptpl = (buf[17] & 0x01); 3602c66ac9dbSNicholas Bellinger unreg = (buf[17] & 0x02); 3603c66ac9dbSNicholas Bellinger } 360492404e60SNicholas Bellinger /* 360592404e60SNicholas Bellinger * If the backend device has been configured to force APTPL metadata 360692404e60SNicholas Bellinger * write-out, go ahead and propigate aptpl=1 down now. 360792404e60SNicholas Bellinger */ 360892404e60SNicholas Bellinger if (dev->dev_attrib.force_pr_aptpl) 360992404e60SNicholas Bellinger aptpl = 1; 361092404e60SNicholas Bellinger 36114949314cSAndy Grover transport_kunmap_data_sg(cmd); 361205d1c7c0SAndy Grover buf = NULL; 361305d1c7c0SAndy Grover 3614c66ac9dbSNicholas Bellinger /* 3615c66ac9dbSNicholas Bellinger * SPEC_I_PT=1 is only valid for Service action: REGISTER 3616c66ac9dbSNicholas Bellinger */ 3617de103c93SChristoph Hellwig if (spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER)) 3618de103c93SChristoph Hellwig return TCM_INVALID_PARAMETER_LIST; 3619d29a5b6aSChristoph Hellwig 3620c66ac9dbSNicholas Bellinger /* 3621c66ac9dbSNicholas Bellinger * From spc4r17 section 6.14: 3622c66ac9dbSNicholas Bellinger * 3623c66ac9dbSNicholas Bellinger * If the SPEC_I_PT bit is set to zero, the service action is not 3624c66ac9dbSNicholas Bellinger * REGISTER AND MOVE, and the parameter list length is not 24, then 3625c66ac9dbSNicholas Bellinger * the command shall be terminated with CHECK CONDITION status, with 3626c66ac9dbSNicholas Bellinger * the sense key set to ILLEGAL REQUEST, and the additional sense 3627c66ac9dbSNicholas Bellinger * code set to PARAMETER LIST LENGTH ERROR. 3628c66ac9dbSNicholas Bellinger */ 36296708bb27SAndy Grover if (!spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER_AND_MOVE) && 3630c66ac9dbSNicholas Bellinger (cmd->data_length != 24)) { 36316708bb27SAndy Grover pr_warn("SPC-PR: Received PR OUT illegal parameter" 3632c66ac9dbSNicholas Bellinger " list length: %u\n", cmd->data_length); 3633de103c93SChristoph Hellwig return TCM_INVALID_PARAMETER_LIST; 3634c66ac9dbSNicholas Bellinger } 3635de103c93SChristoph Hellwig 3636c66ac9dbSNicholas Bellinger /* 3637c66ac9dbSNicholas Bellinger * (core_scsi3_emulate_pro_* function parameters 3638c66ac9dbSNicholas Bellinger * are defined by spc4r17 Table 174: 3639c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_OUT service actions and valid parameters. 3640c66ac9dbSNicholas Bellinger */ 3641c66ac9dbSNicholas Bellinger switch (sa) { 3642c66ac9dbSNicholas Bellinger case PRO_REGISTER: 3643d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_register(cmd, 364433ce6a87SAndy Grover res_key, sa_res_key, aptpl, all_tg_pt, spec_i_pt, REGISTER); 3645d29a5b6aSChristoph Hellwig break; 3646c66ac9dbSNicholas Bellinger case PRO_RESERVE: 3647d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_reserve(cmd, type, scope, res_key); 3648d29a5b6aSChristoph Hellwig break; 3649c66ac9dbSNicholas Bellinger case PRO_RELEASE: 3650d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_release(cmd, type, scope, res_key); 3651d29a5b6aSChristoph Hellwig break; 3652c66ac9dbSNicholas Bellinger case PRO_CLEAR: 3653d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_clear(cmd, res_key); 3654d29a5b6aSChristoph Hellwig break; 3655c66ac9dbSNicholas Bellinger case PRO_PREEMPT: 3656d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_preempt(cmd, type, scope, 365733ce6a87SAndy Grover res_key, sa_res_key, PREEMPT); 3658d29a5b6aSChristoph Hellwig break; 3659c66ac9dbSNicholas Bellinger case PRO_PREEMPT_AND_ABORT: 3660d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_preempt(cmd, type, scope, 366133ce6a87SAndy Grover res_key, sa_res_key, PREEMPT_AND_ABORT); 3662d29a5b6aSChristoph Hellwig break; 3663c66ac9dbSNicholas Bellinger case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: 3664d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_register(cmd, 366533ce6a87SAndy Grover 0, sa_res_key, aptpl, all_tg_pt, spec_i_pt, REGISTER_AND_IGNORE_EXISTING_KEY); 3666d29a5b6aSChristoph Hellwig break; 3667c66ac9dbSNicholas Bellinger case PRO_REGISTER_AND_MOVE: 3668d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_register_and_move(cmd, res_key, 3669c66ac9dbSNicholas Bellinger sa_res_key, aptpl, unreg); 3670d29a5b6aSChristoph Hellwig break; 3671c66ac9dbSNicholas Bellinger default: 36726708bb27SAndy Grover pr_err("Unknown PERSISTENT_RESERVE_OUT service" 3673c66ac9dbSNicholas Bellinger " action: 0x%02x\n", cdb[1] & 0x1f); 3674de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 3675c66ac9dbSNicholas Bellinger } 3676c66ac9dbSNicholas Bellinger 36776bb35e00SChristoph Hellwig if (!ret) 36786bb35e00SChristoph Hellwig target_complete_cmd(cmd, GOOD); 3679d29a5b6aSChristoph Hellwig return ret; 3680c66ac9dbSNicholas Bellinger } 3681c66ac9dbSNicholas Bellinger 3682c66ac9dbSNicholas Bellinger /* 3683c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_IN Service Action READ_KEYS 3684c66ac9dbSNicholas Bellinger * 3685c66ac9dbSNicholas Bellinger * See spc4r17 section 5.7.6.2 and section 6.13.2, Table 160 3686c66ac9dbSNicholas Bellinger */ 3687de103c93SChristoph Hellwig static sense_reason_t 3688de103c93SChristoph Hellwig core_scsi3_pri_read_keys(struct se_cmd *cmd) 3689c66ac9dbSNicholas Bellinger { 36900fd97ccfSChristoph Hellwig struct se_device *dev = cmd->se_dev; 3691c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 369205d1c7c0SAndy Grover unsigned char *buf; 3693c66ac9dbSNicholas Bellinger u32 add_len = 0, off = 8; 3694c66ac9dbSNicholas Bellinger 3695c66ac9dbSNicholas Bellinger if (cmd->data_length < 8) { 36966708bb27SAndy Grover pr_err("PRIN SA READ_KEYS SCSI Data Length: %u" 3697c66ac9dbSNicholas Bellinger " too small\n", cmd->data_length); 3698de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 3699c66ac9dbSNicholas Bellinger } 3700c66ac9dbSNicholas Bellinger 37014949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3702de103c93SChristoph Hellwig if (!buf) 3703de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3704de103c93SChristoph Hellwig 37050fd97ccfSChristoph Hellwig buf[0] = ((dev->t10_pr.pr_generation >> 24) & 0xff); 37060fd97ccfSChristoph Hellwig buf[1] = ((dev->t10_pr.pr_generation >> 16) & 0xff); 37070fd97ccfSChristoph Hellwig buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff); 37080fd97ccfSChristoph Hellwig buf[3] = (dev->t10_pr.pr_generation & 0xff); 3709c66ac9dbSNicholas Bellinger 37100fd97ccfSChristoph Hellwig spin_lock(&dev->t10_pr.registration_lock); 37110fd97ccfSChristoph Hellwig list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 3712c66ac9dbSNicholas Bellinger pr_reg_list) { 3713c66ac9dbSNicholas Bellinger /* 3714c66ac9dbSNicholas Bellinger * Check for overflow of 8byte PRI READ_KEYS payload and 3715c66ac9dbSNicholas Bellinger * next reservation key list descriptor. 3716c66ac9dbSNicholas Bellinger */ 3717c66ac9dbSNicholas Bellinger if ((add_len + 8) > (cmd->data_length - 8)) 3718c66ac9dbSNicholas Bellinger break; 3719c66ac9dbSNicholas Bellinger 3720c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff); 3721c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff); 3722c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff); 3723c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff); 3724c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff); 3725c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff); 3726c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff); 3727c66ac9dbSNicholas Bellinger buf[off++] = (pr_reg->pr_res_key & 0xff); 3728c66ac9dbSNicholas Bellinger 3729c66ac9dbSNicholas Bellinger add_len += 8; 3730c66ac9dbSNicholas Bellinger } 37310fd97ccfSChristoph Hellwig spin_unlock(&dev->t10_pr.registration_lock); 3732c66ac9dbSNicholas Bellinger 3733c66ac9dbSNicholas Bellinger buf[4] = ((add_len >> 24) & 0xff); 3734c66ac9dbSNicholas Bellinger buf[5] = ((add_len >> 16) & 0xff); 3735c66ac9dbSNicholas Bellinger buf[6] = ((add_len >> 8) & 0xff); 3736c66ac9dbSNicholas Bellinger buf[7] = (add_len & 0xff); 3737c66ac9dbSNicholas Bellinger 37384949314cSAndy Grover transport_kunmap_data_sg(cmd); 373905d1c7c0SAndy Grover 3740c66ac9dbSNicholas Bellinger return 0; 3741c66ac9dbSNicholas Bellinger } 3742c66ac9dbSNicholas Bellinger 3743c66ac9dbSNicholas Bellinger /* 3744c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_IN Service Action READ_RESERVATION 3745c66ac9dbSNicholas Bellinger * 3746c66ac9dbSNicholas Bellinger * See spc4r17 section 5.7.6.3 and section 6.13.3.2 Table 161 and 162 3747c66ac9dbSNicholas Bellinger */ 3748de103c93SChristoph Hellwig static sense_reason_t 3749de103c93SChristoph Hellwig core_scsi3_pri_read_reservation(struct se_cmd *cmd) 3750c66ac9dbSNicholas Bellinger { 37510fd97ccfSChristoph Hellwig struct se_device *dev = cmd->se_dev; 3752c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 375305d1c7c0SAndy Grover unsigned char *buf; 3754c66ac9dbSNicholas Bellinger u64 pr_res_key; 3755c66ac9dbSNicholas Bellinger u32 add_len = 16; /* Hardcoded to 16 when a reservation is held. */ 3756c66ac9dbSNicholas Bellinger 3757c66ac9dbSNicholas Bellinger if (cmd->data_length < 8) { 37586708bb27SAndy Grover pr_err("PRIN SA READ_RESERVATIONS SCSI Data Length: %u" 3759c66ac9dbSNicholas Bellinger " too small\n", cmd->data_length); 3760de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 3761c66ac9dbSNicholas Bellinger } 3762c66ac9dbSNicholas Bellinger 37634949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3764de103c93SChristoph Hellwig if (!buf) 3765de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3766de103c93SChristoph Hellwig 37670fd97ccfSChristoph Hellwig buf[0] = ((dev->t10_pr.pr_generation >> 24) & 0xff); 37680fd97ccfSChristoph Hellwig buf[1] = ((dev->t10_pr.pr_generation >> 16) & 0xff); 37690fd97ccfSChristoph Hellwig buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff); 37700fd97ccfSChristoph Hellwig buf[3] = (dev->t10_pr.pr_generation & 0xff); 3771c66ac9dbSNicholas Bellinger 37720fd97ccfSChristoph Hellwig spin_lock(&dev->dev_reservation_lock); 37730fd97ccfSChristoph Hellwig pr_reg = dev->dev_pr_res_holder; 3774ee1b1b9cSAndy Grover if (pr_reg) { 3775c66ac9dbSNicholas Bellinger /* 3776c66ac9dbSNicholas Bellinger * Set the hardcoded Additional Length 3777c66ac9dbSNicholas Bellinger */ 3778c66ac9dbSNicholas Bellinger buf[4] = ((add_len >> 24) & 0xff); 3779c66ac9dbSNicholas Bellinger buf[5] = ((add_len >> 16) & 0xff); 3780c66ac9dbSNicholas Bellinger buf[6] = ((add_len >> 8) & 0xff); 3781c66ac9dbSNicholas Bellinger buf[7] = (add_len & 0xff); 3782c66ac9dbSNicholas Bellinger 378305d1c7c0SAndy Grover if (cmd->data_length < 22) 378405d1c7c0SAndy Grover goto err; 378505d1c7c0SAndy Grover 3786c66ac9dbSNicholas Bellinger /* 3787c66ac9dbSNicholas Bellinger * Set the Reservation key. 3788c66ac9dbSNicholas Bellinger * 3789c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.10: 3790c66ac9dbSNicholas Bellinger * A persistent reservation holder has its reservation key 3791c66ac9dbSNicholas Bellinger * returned in the parameter data from a PERSISTENT 3792c66ac9dbSNicholas Bellinger * RESERVE IN command with READ RESERVATION service action as 3793c66ac9dbSNicholas Bellinger * follows: 3794c66ac9dbSNicholas Bellinger * a) For a persistent reservation of the type Write Exclusive 3795c66ac9dbSNicholas Bellinger * - All Registrants or Exclusive Access All Regitrants, 3796c66ac9dbSNicholas Bellinger * the reservation key shall be set to zero; or 3797c66ac9dbSNicholas Bellinger * b) For all other persistent reservation types, the 3798c66ac9dbSNicholas Bellinger * reservation key shall be set to the registered 3799c66ac9dbSNicholas Bellinger * reservation key for the I_T nexus that holds the 3800c66ac9dbSNicholas Bellinger * persistent reservation. 3801c66ac9dbSNicholas Bellinger */ 3802c66ac9dbSNicholas Bellinger if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 3803c66ac9dbSNicholas Bellinger (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) 3804c66ac9dbSNicholas Bellinger pr_res_key = 0; 3805c66ac9dbSNicholas Bellinger else 3806c66ac9dbSNicholas Bellinger pr_res_key = pr_reg->pr_res_key; 3807c66ac9dbSNicholas Bellinger 3808c66ac9dbSNicholas Bellinger buf[8] = ((pr_res_key >> 56) & 0xff); 3809c66ac9dbSNicholas Bellinger buf[9] = ((pr_res_key >> 48) & 0xff); 3810c66ac9dbSNicholas Bellinger buf[10] = ((pr_res_key >> 40) & 0xff); 3811c66ac9dbSNicholas Bellinger buf[11] = ((pr_res_key >> 32) & 0xff); 3812c66ac9dbSNicholas Bellinger buf[12] = ((pr_res_key >> 24) & 0xff); 3813c66ac9dbSNicholas Bellinger buf[13] = ((pr_res_key >> 16) & 0xff); 3814c66ac9dbSNicholas Bellinger buf[14] = ((pr_res_key >> 8) & 0xff); 3815c66ac9dbSNicholas Bellinger buf[15] = (pr_res_key & 0xff); 3816c66ac9dbSNicholas Bellinger /* 3817c66ac9dbSNicholas Bellinger * Set the SCOPE and TYPE 3818c66ac9dbSNicholas Bellinger */ 3819c66ac9dbSNicholas Bellinger buf[21] = (pr_reg->pr_res_scope & 0xf0) | 3820c66ac9dbSNicholas Bellinger (pr_reg->pr_res_type & 0x0f); 3821c66ac9dbSNicholas Bellinger } 382205d1c7c0SAndy Grover 382305d1c7c0SAndy Grover err: 38240fd97ccfSChristoph Hellwig spin_unlock(&dev->dev_reservation_lock); 38254949314cSAndy Grover transport_kunmap_data_sg(cmd); 3826c66ac9dbSNicholas Bellinger 3827c66ac9dbSNicholas Bellinger return 0; 3828c66ac9dbSNicholas Bellinger } 3829c66ac9dbSNicholas Bellinger 3830c66ac9dbSNicholas Bellinger /* 3831c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_IN Service Action REPORT_CAPABILITIES 3832c66ac9dbSNicholas Bellinger * 3833c66ac9dbSNicholas Bellinger * See spc4r17 section 6.13.4 Table 165 3834c66ac9dbSNicholas Bellinger */ 3835de103c93SChristoph Hellwig static sense_reason_t 3836de103c93SChristoph Hellwig core_scsi3_pri_report_capabilities(struct se_cmd *cmd) 3837c66ac9dbSNicholas Bellinger { 38385951146dSAndy Grover struct se_device *dev = cmd->se_dev; 38390fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 384005d1c7c0SAndy Grover unsigned char *buf; 3841c66ac9dbSNicholas Bellinger u16 add_len = 8; /* Hardcoded to 8. */ 3842c66ac9dbSNicholas Bellinger 3843c66ac9dbSNicholas Bellinger if (cmd->data_length < 6) { 38446708bb27SAndy Grover pr_err("PRIN SA REPORT_CAPABILITIES SCSI Data Length:" 3845c66ac9dbSNicholas Bellinger " %u too small\n", cmd->data_length); 3846de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 3847c66ac9dbSNicholas Bellinger } 3848c66ac9dbSNicholas Bellinger 38494949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3850de103c93SChristoph Hellwig if (!buf) 3851de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 385205d1c7c0SAndy Grover 3853c435285dSJoern Engel buf[0] = ((add_len >> 8) & 0xff); 3854c66ac9dbSNicholas Bellinger buf[1] = (add_len & 0xff); 3855c66ac9dbSNicholas Bellinger buf[2] |= 0x10; /* CRH: Compatible Reservation Hanlding bit. */ 3856c66ac9dbSNicholas Bellinger buf[2] |= 0x08; /* SIP_C: Specify Initiator Ports Capable bit */ 3857c66ac9dbSNicholas Bellinger buf[2] |= 0x04; /* ATP_C: All Target Ports Capable bit */ 3858c66ac9dbSNicholas Bellinger buf[2] |= 0x01; /* PTPL_C: Persistence across Target Power Loss bit */ 3859c66ac9dbSNicholas Bellinger /* 3860c66ac9dbSNicholas Bellinger * We are filling in the PERSISTENT RESERVATION TYPE MASK below, so 3861c66ac9dbSNicholas Bellinger * set the TMV: Task Mask Valid bit. 3862c66ac9dbSNicholas Bellinger */ 3863c66ac9dbSNicholas Bellinger buf[3] |= 0x80; 3864c66ac9dbSNicholas Bellinger /* 3865c66ac9dbSNicholas Bellinger * Change ALLOW COMMANDs to 0x20 or 0x40 later from Table 166 3866c66ac9dbSNicholas Bellinger */ 3867c66ac9dbSNicholas Bellinger buf[3] |= 0x10; /* ALLOW COMMANDs field 001b */ 3868c66ac9dbSNicholas Bellinger /* 3869c66ac9dbSNicholas Bellinger * PTPL_A: Persistence across Target Power Loss Active bit 3870c66ac9dbSNicholas Bellinger */ 3871c66ac9dbSNicholas Bellinger if (pr_tmpl->pr_aptpl_active) 3872c66ac9dbSNicholas Bellinger buf[3] |= 0x01; 3873c66ac9dbSNicholas Bellinger /* 3874c66ac9dbSNicholas Bellinger * Setup the PERSISTENT RESERVATION TYPE MASK from Table 167 3875c66ac9dbSNicholas Bellinger */ 3876c66ac9dbSNicholas Bellinger buf[4] |= 0x80; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ 3877c66ac9dbSNicholas Bellinger buf[4] |= 0x40; /* PR_TYPE_EXCLUSIVE_ACCESS_REGONLY */ 3878c66ac9dbSNicholas Bellinger buf[4] |= 0x20; /* PR_TYPE_WRITE_EXCLUSIVE_REGONLY */ 3879c66ac9dbSNicholas Bellinger buf[4] |= 0x08; /* PR_TYPE_EXCLUSIVE_ACCESS */ 3880c66ac9dbSNicholas Bellinger buf[4] |= 0x02; /* PR_TYPE_WRITE_EXCLUSIVE */ 3881c66ac9dbSNicholas Bellinger buf[5] |= 0x01; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ 3882c66ac9dbSNicholas Bellinger 38834949314cSAndy Grover transport_kunmap_data_sg(cmd); 388405d1c7c0SAndy Grover 3885c66ac9dbSNicholas Bellinger return 0; 3886c66ac9dbSNicholas Bellinger } 3887c66ac9dbSNicholas Bellinger 3888c66ac9dbSNicholas Bellinger /* 3889c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_IN Service Action READ_FULL_STATUS 3890c66ac9dbSNicholas Bellinger * 3891c66ac9dbSNicholas Bellinger * See spc4r17 section 6.13.5 Table 168 and 169 3892c66ac9dbSNicholas Bellinger */ 3893de103c93SChristoph Hellwig static sense_reason_t 3894de103c93SChristoph Hellwig core_scsi3_pri_read_full_status(struct se_cmd *cmd) 3895c66ac9dbSNicholas Bellinger { 38960fd97ccfSChristoph Hellwig struct se_device *dev = cmd->se_dev; 3897c66ac9dbSNicholas Bellinger struct se_node_acl *se_nacl; 3898c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg; 3899c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp; 39000fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 390105d1c7c0SAndy Grover unsigned char *buf; 3902c66ac9dbSNicholas Bellinger u32 add_desc_len = 0, add_len = 0, desc_len, exp_desc_len; 3903c66ac9dbSNicholas Bellinger u32 off = 8; /* off into first Full Status descriptor */ 3904d16ca7c5SNicholas Bellinger int format_code = 0, pr_res_type = 0, pr_res_scope = 0; 3905d16ca7c5SNicholas Bellinger bool all_reg = false; 3906c66ac9dbSNicholas Bellinger 3907c66ac9dbSNicholas Bellinger if (cmd->data_length < 8) { 39086708bb27SAndy Grover pr_err("PRIN SA READ_FULL_STATUS SCSI Data Length: %u" 3909c66ac9dbSNicholas Bellinger " too small\n", cmd->data_length); 3910de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 3911c66ac9dbSNicholas Bellinger } 3912c66ac9dbSNicholas Bellinger 39134949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3914de103c93SChristoph Hellwig if (!buf) 3915de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 391605d1c7c0SAndy Grover 39170fd97ccfSChristoph Hellwig buf[0] = ((dev->t10_pr.pr_generation >> 24) & 0xff); 39180fd97ccfSChristoph Hellwig buf[1] = ((dev->t10_pr.pr_generation >> 16) & 0xff); 39190fd97ccfSChristoph Hellwig buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff); 39200fd97ccfSChristoph Hellwig buf[3] = (dev->t10_pr.pr_generation & 0xff); 3921c66ac9dbSNicholas Bellinger 3922d16ca7c5SNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 3923d16ca7c5SNicholas Bellinger if (dev->dev_pr_res_holder) { 3924d16ca7c5SNicholas Bellinger struct t10_pr_registration *pr_holder = dev->dev_pr_res_holder; 3925d16ca7c5SNicholas Bellinger 3926d16ca7c5SNicholas Bellinger if (pr_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG || 3927d16ca7c5SNicholas Bellinger pr_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG) { 3928d16ca7c5SNicholas Bellinger all_reg = true; 3929d16ca7c5SNicholas Bellinger pr_res_type = pr_holder->pr_res_type; 3930d16ca7c5SNicholas Bellinger pr_res_scope = pr_holder->pr_res_scope; 3931d16ca7c5SNicholas Bellinger } 3932d16ca7c5SNicholas Bellinger } 3933d16ca7c5SNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3934d16ca7c5SNicholas Bellinger 3935c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 3936c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 3937c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 3938c66ac9dbSNicholas Bellinger 3939c66ac9dbSNicholas Bellinger se_nacl = pr_reg->pr_reg_nacl; 3940c66ac9dbSNicholas Bellinger se_tpg = pr_reg->pr_reg_nacl->se_tpg; 3941c66ac9dbSNicholas Bellinger add_desc_len = 0; 3942c66ac9dbSNicholas Bellinger 394333940d09SJoern Engel atomic_inc_mb(&pr_reg->pr_res_holders); 3944c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 3945c66ac9dbSNicholas Bellinger /* 3946c66ac9dbSNicholas Bellinger * Determine expected length of $FABRIC_MOD specific 3947c66ac9dbSNicholas Bellinger * TransportID full status descriptor.. 3948c66ac9dbSNicholas Bellinger */ 3949e3d6f909SAndy Grover exp_desc_len = se_tpg->se_tpg_tfo->tpg_get_pr_transport_id_len( 3950c66ac9dbSNicholas Bellinger se_tpg, se_nacl, pr_reg, &format_code); 3951c66ac9dbSNicholas Bellinger 3952c66ac9dbSNicholas Bellinger if ((exp_desc_len + add_len) > cmd->data_length) { 39536708bb27SAndy Grover pr_warn("SPC-3 PRIN READ_FULL_STATUS ran" 3954c66ac9dbSNicholas Bellinger " out of buffer: %d\n", cmd->data_length); 3955c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 395633940d09SJoern Engel atomic_dec_mb(&pr_reg->pr_res_holders); 3957c66ac9dbSNicholas Bellinger break; 3958c66ac9dbSNicholas Bellinger } 3959c66ac9dbSNicholas Bellinger /* 3960c66ac9dbSNicholas Bellinger * Set RESERVATION KEY 3961c66ac9dbSNicholas Bellinger */ 3962c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff); 3963c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff); 3964c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff); 3965c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff); 3966c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff); 3967c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff); 3968c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff); 3969c66ac9dbSNicholas Bellinger buf[off++] = (pr_reg->pr_res_key & 0xff); 3970c66ac9dbSNicholas Bellinger off += 4; /* Skip Over Reserved area */ 3971c66ac9dbSNicholas Bellinger 3972c66ac9dbSNicholas Bellinger /* 3973c66ac9dbSNicholas Bellinger * Set ALL_TG_PT bit if PROUT SA REGISTER had this set. 3974c66ac9dbSNicholas Bellinger */ 3975c66ac9dbSNicholas Bellinger if (pr_reg->pr_reg_all_tg_pt) 3976c66ac9dbSNicholas Bellinger buf[off] = 0x02; 3977c66ac9dbSNicholas Bellinger /* 3978c66ac9dbSNicholas Bellinger * The struct se_lun pointer will be present for the 3979c66ac9dbSNicholas Bellinger * reservation holder for PR_HOLDER bit. 3980c66ac9dbSNicholas Bellinger * 3981c66ac9dbSNicholas Bellinger * Also, if this registration is the reservation 3982d16ca7c5SNicholas Bellinger * holder or there is an All Registrants reservation 3983d16ca7c5SNicholas Bellinger * active, fill in SCOPE and TYPE in the next byte. 3984c66ac9dbSNicholas Bellinger */ 3985c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_holder) { 3986c66ac9dbSNicholas Bellinger buf[off++] |= 0x01; 3987c66ac9dbSNicholas Bellinger buf[off++] = (pr_reg->pr_res_scope & 0xf0) | 3988c66ac9dbSNicholas Bellinger (pr_reg->pr_res_type & 0x0f); 3989d16ca7c5SNicholas Bellinger } else if (all_reg) { 3990d16ca7c5SNicholas Bellinger buf[off++] |= 0x01; 3991d16ca7c5SNicholas Bellinger buf[off++] = (pr_res_scope & 0xf0) | 3992d16ca7c5SNicholas Bellinger (pr_res_type & 0x0f); 3993d16ca7c5SNicholas Bellinger } else { 3994c66ac9dbSNicholas Bellinger off += 2; 3995d16ca7c5SNicholas Bellinger } 3996c66ac9dbSNicholas Bellinger 3997c66ac9dbSNicholas Bellinger off += 4; /* Skip over reserved area */ 3998c66ac9dbSNicholas Bellinger /* 3999c66ac9dbSNicholas Bellinger * From spc4r17 6.3.15: 4000c66ac9dbSNicholas Bellinger * 4001c66ac9dbSNicholas Bellinger * If the ALL_TG_PT bit set to zero, the RELATIVE TARGET PORT 4002c66ac9dbSNicholas Bellinger * IDENTIFIER field contains the relative port identifier (see 4003c66ac9dbSNicholas Bellinger * 3.1.120) of the target port that is part of the I_T nexus 4004c66ac9dbSNicholas Bellinger * described by this full status descriptor. If the ALL_TG_PT 4005c66ac9dbSNicholas Bellinger * bit is set to one, the contents of the RELATIVE TARGET PORT 4006c66ac9dbSNicholas Bellinger * IDENTIFIER field are not defined by this standard. 4007c66ac9dbSNicholas Bellinger */ 40086708bb27SAndy Grover if (!pr_reg->pr_reg_all_tg_pt) { 4009c66ac9dbSNicholas Bellinger struct se_port *port = pr_reg->pr_reg_tg_pt_lun->lun_sep; 4010c66ac9dbSNicholas Bellinger 4011c66ac9dbSNicholas Bellinger buf[off++] = ((port->sep_rtpi >> 8) & 0xff); 4012c66ac9dbSNicholas Bellinger buf[off++] = (port->sep_rtpi & 0xff); 4013c66ac9dbSNicholas Bellinger } else 401435d1efe8SMasanari Iida off += 2; /* Skip over RELATIVE TARGET PORT IDENTIFIER */ 4015c66ac9dbSNicholas Bellinger 4016c66ac9dbSNicholas Bellinger /* 4017c66ac9dbSNicholas Bellinger * Now, have the $FABRIC_MOD fill in the protocol identifier 4018c66ac9dbSNicholas Bellinger */ 4019e3d6f909SAndy Grover desc_len = se_tpg->se_tpg_tfo->tpg_get_pr_transport_id(se_tpg, 4020c66ac9dbSNicholas Bellinger se_nacl, pr_reg, &format_code, &buf[off+4]); 4021c66ac9dbSNicholas Bellinger 4022c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 402333940d09SJoern Engel atomic_dec_mb(&pr_reg->pr_res_holders); 4024c66ac9dbSNicholas Bellinger /* 4025c66ac9dbSNicholas Bellinger * Set the ADDITIONAL DESCRIPTOR LENGTH 4026c66ac9dbSNicholas Bellinger */ 4027c66ac9dbSNicholas Bellinger buf[off++] = ((desc_len >> 24) & 0xff); 4028c66ac9dbSNicholas Bellinger buf[off++] = ((desc_len >> 16) & 0xff); 4029c66ac9dbSNicholas Bellinger buf[off++] = ((desc_len >> 8) & 0xff); 4030c66ac9dbSNicholas Bellinger buf[off++] = (desc_len & 0xff); 4031c66ac9dbSNicholas Bellinger /* 4032c66ac9dbSNicholas Bellinger * Size of full desctipor header minus TransportID 4033c66ac9dbSNicholas Bellinger * containing $FABRIC_MOD specific) initiator device/port 4034c66ac9dbSNicholas Bellinger * WWN information. 4035c66ac9dbSNicholas Bellinger * 4036c66ac9dbSNicholas Bellinger * See spc4r17 Section 6.13.5 Table 169 4037c66ac9dbSNicholas Bellinger */ 4038c66ac9dbSNicholas Bellinger add_desc_len = (24 + desc_len); 4039c66ac9dbSNicholas Bellinger 4040c66ac9dbSNicholas Bellinger off += desc_len; 4041c66ac9dbSNicholas Bellinger add_len += add_desc_len; 4042c66ac9dbSNicholas Bellinger } 4043c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 4044c66ac9dbSNicholas Bellinger /* 4045c66ac9dbSNicholas Bellinger * Set ADDITIONAL_LENGTH 4046c66ac9dbSNicholas Bellinger */ 4047c66ac9dbSNicholas Bellinger buf[4] = ((add_len >> 24) & 0xff); 4048c66ac9dbSNicholas Bellinger buf[5] = ((add_len >> 16) & 0xff); 4049c66ac9dbSNicholas Bellinger buf[6] = ((add_len >> 8) & 0xff); 4050c66ac9dbSNicholas Bellinger buf[7] = (add_len & 0xff); 4051c66ac9dbSNicholas Bellinger 40524949314cSAndy Grover transport_kunmap_data_sg(cmd); 405305d1c7c0SAndy Grover 4054c66ac9dbSNicholas Bellinger return 0; 4055c66ac9dbSNicholas Bellinger } 4056c66ac9dbSNicholas Bellinger 4057de103c93SChristoph Hellwig sense_reason_t 4058de103c93SChristoph Hellwig target_scsi3_emulate_pr_in(struct se_cmd *cmd) 4059c66ac9dbSNicholas Bellinger { 4060de103c93SChristoph Hellwig sense_reason_t ret; 4061e76a35d6SChristoph Hellwig 4062617c0e06SChristoph Hellwig /* 4063617c0e06SChristoph Hellwig * Following spc2r20 5.5.1 Reservations overview: 4064617c0e06SChristoph Hellwig * 4065617c0e06SChristoph Hellwig * If a logical unit has been reserved by any RESERVE command and is 4066617c0e06SChristoph Hellwig * still reserved by any initiator, all PERSISTENT RESERVE IN and all 4067617c0e06SChristoph Hellwig * PERSISTENT RESERVE OUT commands shall conflict regardless of 4068617c0e06SChristoph Hellwig * initiator or service action and shall terminate with a RESERVATION 4069617c0e06SChristoph Hellwig * CONFLICT status. 4070617c0e06SChristoph Hellwig */ 40710fd97ccfSChristoph Hellwig if (cmd->se_dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) { 4072617c0e06SChristoph Hellwig pr_err("Received PERSISTENT_RESERVE CDB while legacy" 4073617c0e06SChristoph Hellwig " SPC-2 reservation is held, returning" 4074617c0e06SChristoph Hellwig " RESERVATION_CONFLICT\n"); 4075de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 4076617c0e06SChristoph Hellwig } 4077617c0e06SChristoph Hellwig 4078617c0e06SChristoph Hellwig switch (cmd->t_task_cdb[1] & 0x1f) { 4079c66ac9dbSNicholas Bellinger case PRI_READ_KEYS: 4080d29a5b6aSChristoph Hellwig ret = core_scsi3_pri_read_keys(cmd); 4081d29a5b6aSChristoph Hellwig break; 4082c66ac9dbSNicholas Bellinger case PRI_READ_RESERVATION: 4083d29a5b6aSChristoph Hellwig ret = core_scsi3_pri_read_reservation(cmd); 4084d29a5b6aSChristoph Hellwig break; 4085c66ac9dbSNicholas Bellinger case PRI_REPORT_CAPABILITIES: 4086d29a5b6aSChristoph Hellwig ret = core_scsi3_pri_report_capabilities(cmd); 4087d29a5b6aSChristoph Hellwig break; 4088c66ac9dbSNicholas Bellinger case PRI_READ_FULL_STATUS: 4089d29a5b6aSChristoph Hellwig ret = core_scsi3_pri_read_full_status(cmd); 4090d29a5b6aSChristoph Hellwig break; 4091c66ac9dbSNicholas Bellinger default: 40926708bb27SAndy Grover pr_err("Unknown PERSISTENT_RESERVE_IN service" 4093617c0e06SChristoph Hellwig " action: 0x%02x\n", cmd->t_task_cdb[1] & 0x1f); 4094de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 4095c66ac9dbSNicholas Bellinger } 4096d29a5b6aSChristoph Hellwig 40976bb35e00SChristoph Hellwig if (!ret) 40986bb35e00SChristoph Hellwig target_complete_cmd(cmd, GOOD); 4099d29a5b6aSChristoph Hellwig return ret; 4100c66ac9dbSNicholas Bellinger } 4101c66ac9dbSNicholas Bellinger 4102de103c93SChristoph Hellwig sense_reason_t 4103de103c93SChristoph Hellwig target_check_reservation(struct se_cmd *cmd) 4104c66ac9dbSNicholas Bellinger { 4105d977f437SChristoph Hellwig struct se_device *dev = cmd->se_dev; 4106de103c93SChristoph Hellwig sense_reason_t ret; 4107d977f437SChristoph Hellwig 4108d977f437SChristoph Hellwig if (!cmd->se_sess) 4109c66ac9dbSNicholas Bellinger return 0; 4110d977f437SChristoph Hellwig if (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE) 4111c66ac9dbSNicholas Bellinger return 0; 4112d977f437SChristoph Hellwig if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) 4113d977f437SChristoph Hellwig return 0; 4114c66ac9dbSNicholas Bellinger 4115d977f437SChristoph Hellwig spin_lock(&dev->dev_reservation_lock); 4116d977f437SChristoph Hellwig if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 4117d977f437SChristoph Hellwig ret = target_scsi2_reservation_check(cmd); 4118d977f437SChristoph Hellwig else 4119d977f437SChristoph Hellwig ret = target_scsi3_pr_reservation_check(cmd); 4120d977f437SChristoph Hellwig spin_unlock(&dev->dev_reservation_lock); 41210fd97ccfSChristoph Hellwig 4122d977f437SChristoph Hellwig return ret; 4123c66ac9dbSNicholas Bellinger } 4124