1c66ac9dbSNicholas Bellinger /******************************************************************************* 2c66ac9dbSNicholas Bellinger * Filename: target_core_pr.c 3c66ac9dbSNicholas Bellinger * 4c66ac9dbSNicholas Bellinger * This file contains SPC-3 compliant persistent reservations and 5c66ac9dbSNicholas Bellinger * legacy SPC-2 reservations with compatible reservation handling (CRH=1) 6c66ac9dbSNicholas Bellinger * 74c76251eSNicholas Bellinger * (c) Copyright 2009-2013 Datera, Inc. 8c66ac9dbSNicholas Bellinger * 9c66ac9dbSNicholas Bellinger * Nicholas A. Bellinger <nab@kernel.org> 10c66ac9dbSNicholas Bellinger * 11c66ac9dbSNicholas Bellinger * This program is free software; you can redistribute it and/or modify 12c66ac9dbSNicholas Bellinger * it under the terms of the GNU General Public License as published by 13c66ac9dbSNicholas Bellinger * the Free Software Foundation; either version 2 of the License, or 14c66ac9dbSNicholas Bellinger * (at your option) any later version. 15c66ac9dbSNicholas Bellinger * 16c66ac9dbSNicholas Bellinger * This program is distributed in the hope that it will be useful, 17c66ac9dbSNicholas Bellinger * but WITHOUT ANY WARRANTY; without even the implied warranty of 18c66ac9dbSNicholas Bellinger * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19c66ac9dbSNicholas Bellinger * GNU General Public License for more details. 20c66ac9dbSNicholas Bellinger * 21c66ac9dbSNicholas Bellinger * You should have received a copy of the GNU General Public License 22c66ac9dbSNicholas Bellinger * along with this program; if not, write to the Free Software 23c66ac9dbSNicholas Bellinger * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 24c66ac9dbSNicholas Bellinger * 25c66ac9dbSNicholas Bellinger ******************************************************************************/ 26c66ac9dbSNicholas Bellinger 27c66ac9dbSNicholas Bellinger #include <linux/slab.h> 28c66ac9dbSNicholas Bellinger #include <linux/spinlock.h> 29c66ac9dbSNicholas Bellinger #include <linux/list.h> 305538d294SDavid S. Miller #include <linux/vmalloc.h> 310e9b10a9SAl Viro #include <linux/file.h> 328dcf07beSBart Van Assche #include <linux/fcntl.h> 338dcf07beSBart Van Assche #include <linux/fs.h> 34ba929992SBart Van Assche #include <scsi/scsi_proto.h> 35c66ac9dbSNicholas Bellinger #include <asm/unaligned.h> 36c66ac9dbSNicholas Bellinger 37c66ac9dbSNicholas Bellinger #include <target/target_core_base.h> 38c4795fb2SChristoph Hellwig #include <target/target_core_backend.h> 39c4795fb2SChristoph Hellwig #include <target/target_core_fabric.h> 40c66ac9dbSNicholas Bellinger 41e26d99aeSChristoph Hellwig #include "target_core_internal.h" 42c66ac9dbSNicholas Bellinger #include "target_core_pr.h" 43c66ac9dbSNicholas Bellinger #include "target_core_ua.h" 44c66ac9dbSNicholas Bellinger 45c66ac9dbSNicholas Bellinger /* 46c66ac9dbSNicholas Bellinger * Used for Specify Initiator Ports Capable Bit (SPEC_I_PT) 47c66ac9dbSNicholas Bellinger */ 48c66ac9dbSNicholas Bellinger struct pr_transport_id_holder { 49c66ac9dbSNicholas Bellinger struct t10_pr_registration *dest_pr_reg; 50c66ac9dbSNicholas Bellinger struct se_portal_group *dest_tpg; 51c66ac9dbSNicholas Bellinger struct se_node_acl *dest_node_acl; 52c66ac9dbSNicholas Bellinger struct se_dev_entry *dest_se_deve; 53c66ac9dbSNicholas Bellinger struct list_head dest_list; 54c66ac9dbSNicholas Bellinger }; 55c66ac9dbSNicholas Bellinger 56d2843c17SAndy Grover void core_pr_dump_initiator_port( 57c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 58c66ac9dbSNicholas Bellinger char *buf, 59c66ac9dbSNicholas Bellinger u32 size) 60c66ac9dbSNicholas Bellinger { 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; 234f2d30680SHannes Reinecke pr_debug("SCSI-2 Released reservation for %s LUN: %llu ->" 235f2d30680SHannes Reinecke " MAPPED LUN: %llu for %s\n", 236f2d30680SHannes Reinecke tpg->se_tpg_tfo->get_fabric_name(), 23729a05deeSNicholas Bellinger cmd->se_lun->unpacked_lun, cmd->orig_fe_lun, 238c66ac9dbSNicholas Bellinger sess->se_node_acl->initiatorname); 239c66ac9dbSNicholas Bellinger 240d29a5b6aSChristoph Hellwig out_unlock: 241d29a5b6aSChristoph Hellwig spin_unlock(&dev->dev_reservation_lock); 242d29a5b6aSChristoph Hellwig out: 2436bb35e00SChristoph Hellwig target_complete_cmd(cmd, GOOD); 244de103c93SChristoph Hellwig return 0; 245c66ac9dbSNicholas Bellinger } 246c66ac9dbSNicholas Bellinger 247de103c93SChristoph Hellwig sense_reason_t 248de103c93SChristoph Hellwig target_scsi2_reservation_reserve(struct se_cmd *cmd) 249c66ac9dbSNicholas Bellinger { 250c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 251c66ac9dbSNicholas Bellinger struct se_session *sess = cmd->se_sess; 252609234e3SWei Yongjun struct se_portal_group *tpg; 253de103c93SChristoph Hellwig sense_reason_t ret = 0; 254de103c93SChristoph Hellwig int rc; 255c66ac9dbSNicholas Bellinger 256a1d8b49aSAndy Grover if ((cmd->t_task_cdb[1] & 0x01) && 257a1d8b49aSAndy Grover (cmd->t_task_cdb[1] & 0x02)) { 258a3960cedSColin Ian King pr_err("LongIO and Obsolete Bits set, returning 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()); 280f2d30680SHannes Reinecke pr_err("Original reserver LUN: %llu %s\n", 281e3d6f909SAndy Grover cmd->se_lun->unpacked_lun, 282c66ac9dbSNicholas Bellinger dev->dev_reserved_node_acl->initiatorname); 283f2d30680SHannes Reinecke pr_err("Current attempt - LUN: %llu -> MAPPED LUN: %llu" 284e3d6f909SAndy Grover " from %s \n", cmd->se_lun->unpacked_lun, 28529a05deeSNicholas Bellinger cmd->orig_fe_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 } 297f2d30680SHannes Reinecke pr_debug("SCSI-2 Reserved %s LUN: %llu -> MAPPED LUN: %llu" 298e3d6f909SAndy Grover " for %s\n", tpg->se_tpg_tfo->get_fabric_name(), 29929a05deeSNicholas Bellinger cmd->se_lun->unpacked_lun, cmd->orig_fe_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 */ 3179fcb57f3SChristoph Hellwig static int core_scsi3_pr_seq_non_holder(struct se_cmd *cmd, u32 pr_reg_type, 3189fcb57f3SChristoph Hellwig bool isid_mismatch) 319c66ac9dbSNicholas Bellinger { 320d977f437SChristoph Hellwig unsigned char *cdb = cmd->t_task_cdb; 321e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 32229a05deeSNicholas Bellinger struct se_node_acl *nacl = se_sess->se_node_acl; 3239fcb57f3SChristoph Hellwig int other_cdb = 0; 324c66ac9dbSNicholas Bellinger int registered_nexus = 0, ret = 1; /* Conflict by default */ 325c66ac9dbSNicholas Bellinger int all_reg = 0, reg_only = 0; /* ALL_REG, REG_ONLY */ 326c66ac9dbSNicholas Bellinger int we = 0; /* Write Exclusive */ 327c66ac9dbSNicholas Bellinger int legacy = 0; /* Act like a legacy device and return 328c66ac9dbSNicholas Bellinger * RESERVATION CONFLICT on some CDBs */ 329c66ac9dbSNicholas Bellinger 3309fcb57f3SChristoph Hellwig if (isid_mismatch) { 3319fcb57f3SChristoph Hellwig registered_nexus = 0; 3329fcb57f3SChristoph Hellwig } else { 3339fcb57f3SChristoph Hellwig struct se_dev_entry *se_deve; 334c66ac9dbSNicholas Bellinger 33529a05deeSNicholas Bellinger rcu_read_lock(); 33629a05deeSNicholas Bellinger se_deve = target_nacl_find_deve(nacl, cmd->orig_fe_lun); 33780bfdfa9SNicholas Bellinger if (se_deve) 3389fcb57f3SChristoph Hellwig registered_nexus = test_bit(DEF_PR_REG_ACTIVE, 3399fcb57f3SChristoph Hellwig &se_deve->deve_flags); 34080bfdfa9SNicholas Bellinger rcu_read_unlock(); 3419fcb57f3SChristoph Hellwig } 342c66ac9dbSNicholas Bellinger 343c66ac9dbSNicholas Bellinger switch (pr_reg_type) { 344c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE: 345c66ac9dbSNicholas Bellinger we = 1; 346c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS: 347c66ac9dbSNicholas Bellinger /* 348c66ac9dbSNicholas Bellinger * Some commands are only allowed for the persistent reservation 349c66ac9dbSNicholas Bellinger * holder. 350c66ac9dbSNicholas Bellinger */ 351c66ac9dbSNicholas Bellinger break; 352c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: 353c66ac9dbSNicholas Bellinger we = 1; 354c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: 355c66ac9dbSNicholas Bellinger /* 356c66ac9dbSNicholas Bellinger * Some commands are only allowed for registered I_T Nexuses. 357c66ac9dbSNicholas Bellinger */ 358c66ac9dbSNicholas Bellinger reg_only = 1; 359c66ac9dbSNicholas Bellinger break; 360c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: 361c66ac9dbSNicholas Bellinger we = 1; 362c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: 363c66ac9dbSNicholas Bellinger /* 364c66ac9dbSNicholas Bellinger * Each registered I_T Nexus is a reservation holder. 365c66ac9dbSNicholas Bellinger */ 366c66ac9dbSNicholas Bellinger all_reg = 1; 367c66ac9dbSNicholas Bellinger break; 368c66ac9dbSNicholas Bellinger default: 369e3d6f909SAndy Grover return -EINVAL; 370c66ac9dbSNicholas Bellinger } 371c66ac9dbSNicholas Bellinger /* 372c66ac9dbSNicholas Bellinger * Referenced from spc4r17 table 45 for *NON* PR holder access 373c66ac9dbSNicholas Bellinger */ 374c66ac9dbSNicholas Bellinger switch (cdb[0]) { 375c66ac9dbSNicholas Bellinger case SECURITY_PROTOCOL_IN: 376c66ac9dbSNicholas Bellinger if (registered_nexus) 377c66ac9dbSNicholas Bellinger return 0; 378c66ac9dbSNicholas Bellinger ret = (we) ? 0 : 1; 379c66ac9dbSNicholas Bellinger break; 380c66ac9dbSNicholas Bellinger case MODE_SENSE: 381c66ac9dbSNicholas Bellinger case MODE_SENSE_10: 382c66ac9dbSNicholas Bellinger case READ_ATTRIBUTE: 383c66ac9dbSNicholas Bellinger case READ_BUFFER: 384c66ac9dbSNicholas Bellinger case RECEIVE_DIAGNOSTIC: 385c66ac9dbSNicholas Bellinger if (legacy) { 386c66ac9dbSNicholas Bellinger ret = 1; 387c66ac9dbSNicholas Bellinger break; 388c66ac9dbSNicholas Bellinger } 389c66ac9dbSNicholas Bellinger if (registered_nexus) { 390c66ac9dbSNicholas Bellinger ret = 0; 391c66ac9dbSNicholas Bellinger break; 392c66ac9dbSNicholas Bellinger } 393c66ac9dbSNicholas Bellinger ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ 394c66ac9dbSNicholas Bellinger break; 395c66ac9dbSNicholas Bellinger case PERSISTENT_RESERVE_OUT: 396c66ac9dbSNicholas Bellinger /* 397c66ac9dbSNicholas Bellinger * This follows PERSISTENT_RESERVE_OUT service actions that 398c66ac9dbSNicholas Bellinger * are allowed in the presence of various reservations. 399c66ac9dbSNicholas Bellinger * See spc4r17, table 46 400c66ac9dbSNicholas Bellinger */ 401c66ac9dbSNicholas Bellinger switch (cdb[1] & 0x1f) { 402c66ac9dbSNicholas Bellinger case PRO_CLEAR: 403c66ac9dbSNicholas Bellinger case PRO_PREEMPT: 404c66ac9dbSNicholas Bellinger case PRO_PREEMPT_AND_ABORT: 405c66ac9dbSNicholas Bellinger ret = (registered_nexus) ? 0 : 1; 406c66ac9dbSNicholas Bellinger break; 407c66ac9dbSNicholas Bellinger case PRO_REGISTER: 408c66ac9dbSNicholas Bellinger case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: 409c66ac9dbSNicholas Bellinger ret = 0; 410c66ac9dbSNicholas Bellinger break; 411c66ac9dbSNicholas Bellinger case PRO_REGISTER_AND_MOVE: 412c66ac9dbSNicholas Bellinger case PRO_RESERVE: 413c66ac9dbSNicholas Bellinger ret = 1; 414c66ac9dbSNicholas Bellinger break; 415c66ac9dbSNicholas Bellinger case PRO_RELEASE: 416c66ac9dbSNicholas Bellinger ret = (registered_nexus) ? 0 : 1; 417c66ac9dbSNicholas Bellinger break; 418c66ac9dbSNicholas Bellinger default: 4196708bb27SAndy Grover pr_err("Unknown PERSISTENT_RESERVE_OUT service" 420c66ac9dbSNicholas Bellinger " action: 0x%02x\n", cdb[1] & 0x1f); 421e3d6f909SAndy Grover return -EINVAL; 422c66ac9dbSNicholas Bellinger } 423c66ac9dbSNicholas Bellinger break; 424c66ac9dbSNicholas Bellinger case RELEASE: 425c66ac9dbSNicholas Bellinger case RELEASE_10: 426eacac00cSChristoph Hellwig /* Handled by CRH=1 in target_scsi2_reservation_release() */ 427c66ac9dbSNicholas Bellinger ret = 0; 428c66ac9dbSNicholas Bellinger break; 429c66ac9dbSNicholas Bellinger case RESERVE: 430c66ac9dbSNicholas Bellinger case RESERVE_10: 431eacac00cSChristoph Hellwig /* Handled by CRH=1 in target_scsi2_reservation_reserve() */ 432c66ac9dbSNicholas Bellinger ret = 0; 433c66ac9dbSNicholas Bellinger break; 434c66ac9dbSNicholas Bellinger case TEST_UNIT_READY: 435c66ac9dbSNicholas Bellinger ret = (legacy) ? 1 : 0; /* Conflict for legacy */ 436c66ac9dbSNicholas Bellinger break; 437c66ac9dbSNicholas Bellinger case MAINTENANCE_IN: 438c66ac9dbSNicholas Bellinger switch (cdb[1] & 0x1f) { 439c66ac9dbSNicholas Bellinger case MI_MANAGEMENT_PROTOCOL_IN: 440c66ac9dbSNicholas Bellinger if (registered_nexus) { 441c66ac9dbSNicholas Bellinger ret = 0; 442c66ac9dbSNicholas Bellinger break; 443c66ac9dbSNicholas Bellinger } 444c66ac9dbSNicholas Bellinger ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ 445c66ac9dbSNicholas Bellinger break; 446c66ac9dbSNicholas Bellinger case MI_REPORT_SUPPORTED_OPERATION_CODES: 447c66ac9dbSNicholas Bellinger case MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS: 448c66ac9dbSNicholas Bellinger if (legacy) { 449c66ac9dbSNicholas Bellinger ret = 1; 450c66ac9dbSNicholas Bellinger break; 451c66ac9dbSNicholas Bellinger } 452c66ac9dbSNicholas Bellinger if (registered_nexus) { 453c66ac9dbSNicholas Bellinger ret = 0; 454c66ac9dbSNicholas Bellinger break; 455c66ac9dbSNicholas Bellinger } 456c66ac9dbSNicholas Bellinger ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ 457c66ac9dbSNicholas Bellinger break; 458c66ac9dbSNicholas Bellinger case MI_REPORT_ALIASES: 459c66ac9dbSNicholas Bellinger case MI_REPORT_IDENTIFYING_INFORMATION: 460c66ac9dbSNicholas Bellinger case MI_REPORT_PRIORITY: 461c66ac9dbSNicholas Bellinger case MI_REPORT_TARGET_PGS: 462c66ac9dbSNicholas Bellinger case MI_REPORT_TIMESTAMP: 463c66ac9dbSNicholas Bellinger ret = 0; /* Allowed */ 464c66ac9dbSNicholas Bellinger break; 465c66ac9dbSNicholas Bellinger default: 4666708bb27SAndy Grover pr_err("Unknown MI Service Action: 0x%02x\n", 467c66ac9dbSNicholas Bellinger (cdb[1] & 0x1f)); 468e3d6f909SAndy Grover return -EINVAL; 469c66ac9dbSNicholas Bellinger } 470c66ac9dbSNicholas Bellinger break; 471c66ac9dbSNicholas Bellinger case ACCESS_CONTROL_IN: 472c66ac9dbSNicholas Bellinger case ACCESS_CONTROL_OUT: 473c66ac9dbSNicholas Bellinger case INQUIRY: 474c66ac9dbSNicholas Bellinger case LOG_SENSE: 47585686f69SHannes Reinecke case SERVICE_ACTION_IN_12: 476c66ac9dbSNicholas Bellinger case REPORT_LUNS: 477c66ac9dbSNicholas Bellinger case REQUEST_SENSE: 4786816966aSMarco Sanvido case PERSISTENT_RESERVE_IN: 479c66ac9dbSNicholas Bellinger ret = 0; /*/ Allowed CDBs */ 480c66ac9dbSNicholas Bellinger break; 481c66ac9dbSNicholas Bellinger default: 482c66ac9dbSNicholas Bellinger other_cdb = 1; 483c66ac9dbSNicholas Bellinger break; 484c66ac9dbSNicholas Bellinger } 485c66ac9dbSNicholas Bellinger /* 48625985edcSLucas De Marchi * Case where the CDB is explicitly allowed in the above switch 487c66ac9dbSNicholas Bellinger * statement. 488c66ac9dbSNicholas Bellinger */ 4896708bb27SAndy Grover if (!ret && !other_cdb) { 490125d0119SHannes Reinecke pr_debug("Allowing explicit CDB: 0x%02x for %s" 491c66ac9dbSNicholas Bellinger " reservation holder\n", cdb[0], 492c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 4938b1e1244SAndy Grover 494c66ac9dbSNicholas Bellinger return ret; 495c66ac9dbSNicholas Bellinger } 496c66ac9dbSNicholas Bellinger /* 497c66ac9dbSNicholas Bellinger * Check if write exclusive initiator ports *NOT* holding the 498c66ac9dbSNicholas Bellinger * WRITE_EXCLUSIVE_* reservation. 499c66ac9dbSNicholas Bellinger */ 500ee1b1b9cSAndy Grover if (we && !registered_nexus) { 501c66ac9dbSNicholas Bellinger if (cmd->data_direction == DMA_TO_DEVICE) { 502c66ac9dbSNicholas Bellinger /* 503c66ac9dbSNicholas Bellinger * Conflict for write exclusive 504c66ac9dbSNicholas Bellinger */ 5056708bb27SAndy Grover pr_debug("%s Conflict for unregistered nexus" 506c66ac9dbSNicholas Bellinger " %s CDB: 0x%02x to %s reservation\n", 507c66ac9dbSNicholas Bellinger transport_dump_cmd_direction(cmd), 508c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, cdb[0], 509c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 510c66ac9dbSNicholas Bellinger return 1; 511c66ac9dbSNicholas Bellinger } else { 512c66ac9dbSNicholas Bellinger /* 513c66ac9dbSNicholas Bellinger * Allow non WRITE CDBs for all Write Exclusive 514c66ac9dbSNicholas Bellinger * PR TYPEs to pass for registered and 515c66ac9dbSNicholas Bellinger * non-registered_nexuxes NOT holding the reservation. 516c66ac9dbSNicholas Bellinger * 517c66ac9dbSNicholas Bellinger * We only make noise for the unregisterd nexuses, 518c66ac9dbSNicholas Bellinger * as we expect registered non-reservation holding 519c66ac9dbSNicholas Bellinger * nexuses to issue CDBs. 520c66ac9dbSNicholas Bellinger */ 5218b1e1244SAndy Grover 5226708bb27SAndy Grover if (!registered_nexus) { 523125d0119SHannes Reinecke pr_debug("Allowing implicit CDB: 0x%02x" 524c66ac9dbSNicholas Bellinger " for %s reservation on unregistered" 525c66ac9dbSNicholas Bellinger " nexus\n", cdb[0], 526c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 527c66ac9dbSNicholas Bellinger } 5288b1e1244SAndy Grover 529c66ac9dbSNicholas Bellinger return 0; 530c66ac9dbSNicholas Bellinger } 531c66ac9dbSNicholas Bellinger } else if ((reg_only) || (all_reg)) { 532c66ac9dbSNicholas Bellinger if (registered_nexus) { 533c66ac9dbSNicholas Bellinger /* 534c66ac9dbSNicholas Bellinger * For PR_*_REG_ONLY and PR_*_ALL_REG reservations, 535c66ac9dbSNicholas Bellinger * allow commands from registered nexuses. 536c66ac9dbSNicholas Bellinger */ 5378b1e1244SAndy Grover 538125d0119SHannes Reinecke pr_debug("Allowing implicit CDB: 0x%02x for %s" 539c66ac9dbSNicholas Bellinger " reservation\n", cdb[0], 540c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 5418b1e1244SAndy Grover 542c66ac9dbSNicholas Bellinger return 0; 543c66ac9dbSNicholas Bellinger } 5441ecc7586SLee Duncan } else if (we && registered_nexus) { 5451ecc7586SLee Duncan /* 5461ecc7586SLee Duncan * Reads are allowed for Write Exclusive locks 5471ecc7586SLee Duncan * from all registrants. 5481ecc7586SLee Duncan */ 5491ecc7586SLee Duncan if (cmd->data_direction == DMA_FROM_DEVICE) { 5501ecc7586SLee Duncan pr_debug("Allowing READ CDB: 0x%02x for %s" 5511ecc7586SLee Duncan " reservation\n", cdb[0], 5521ecc7586SLee Duncan core_scsi3_pr_dump_type(pr_reg_type)); 5531ecc7586SLee Duncan 5541ecc7586SLee Duncan return 0; 5551ecc7586SLee Duncan } 556c66ac9dbSNicholas Bellinger } 5576708bb27SAndy Grover pr_debug("%s Conflict for %sregistered nexus %s CDB: 0x%2x" 558c66ac9dbSNicholas Bellinger " for %s reservation\n", transport_dump_cmd_direction(cmd), 559c66ac9dbSNicholas Bellinger (registered_nexus) ? "" : "un", 560c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, cdb[0], 561c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 562c66ac9dbSNicholas Bellinger 563c66ac9dbSNicholas Bellinger return 1; /* Conflict by default */ 564c66ac9dbSNicholas Bellinger } 565c66ac9dbSNicholas Bellinger 566de103c93SChristoph Hellwig static sense_reason_t 567de103c93SChristoph Hellwig target_scsi3_pr_reservation_check(struct se_cmd *cmd) 568d977f437SChristoph Hellwig { 569d977f437SChristoph Hellwig struct se_device *dev = cmd->se_dev; 570d977f437SChristoph Hellwig struct se_session *sess = cmd->se_sess; 571d977f437SChristoph Hellwig u32 pr_reg_type; 5729fcb57f3SChristoph Hellwig bool isid_mismatch = false; 573d977f437SChristoph Hellwig 574d977f437SChristoph Hellwig if (!dev->dev_pr_res_holder) 575d977f437SChristoph Hellwig return 0; 576d977f437SChristoph Hellwig 577d977f437SChristoph Hellwig pr_reg_type = dev->dev_pr_res_holder->pr_res_type; 578d977f437SChristoph Hellwig cmd->pr_res_key = dev->dev_pr_res_holder->pr_res_key; 579d977f437SChristoph Hellwig if (dev->dev_pr_res_holder->pr_reg_nacl != sess->se_node_acl) 580d977f437SChristoph Hellwig goto check_nonholder; 581d977f437SChristoph Hellwig 582d977f437SChristoph Hellwig if (dev->dev_pr_res_holder->isid_present_at_reg) { 583d977f437SChristoph Hellwig if (dev->dev_pr_res_holder->pr_reg_bin_isid != 584d977f437SChristoph Hellwig sess->sess_bin_isid) { 5859fcb57f3SChristoph Hellwig isid_mismatch = true; 586d977f437SChristoph Hellwig goto check_nonholder; 587d977f437SChristoph Hellwig } 588d977f437SChristoph Hellwig } 589d977f437SChristoph Hellwig 590d977f437SChristoph Hellwig return 0; 591d977f437SChristoph Hellwig 592d977f437SChristoph Hellwig check_nonholder: 5939fcb57f3SChristoph Hellwig if (core_scsi3_pr_seq_non_holder(cmd, pr_reg_type, isid_mismatch)) 594de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 595d977f437SChristoph Hellwig return 0; 596d977f437SChristoph Hellwig } 597d977f437SChristoph Hellwig 598c66ac9dbSNicholas Bellinger static u32 core_scsi3_pr_generation(struct se_device *dev) 599c66ac9dbSNicholas Bellinger { 600c66ac9dbSNicholas Bellinger u32 prg; 6010fd97ccfSChristoph Hellwig 602c66ac9dbSNicholas Bellinger /* 603c66ac9dbSNicholas Bellinger * PRGeneration field shall contain the value of a 32-bit wrapping 604c66ac9dbSNicholas Bellinger * counter mainted by the device server. 605c66ac9dbSNicholas Bellinger * 606c66ac9dbSNicholas Bellinger * Note that this is done regardless of Active Persist across 607c66ac9dbSNicholas Bellinger * Target PowerLoss (APTPL) 608c66ac9dbSNicholas Bellinger * 609c66ac9dbSNicholas Bellinger * See spc4r17 section 6.3.12 READ_KEYS service action 610c66ac9dbSNicholas Bellinger */ 611c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 6120fd97ccfSChristoph Hellwig prg = dev->t10_pr.pr_generation++; 613c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 614c66ac9dbSNicholas Bellinger 615c66ac9dbSNicholas Bellinger return prg; 616c66ac9dbSNicholas Bellinger } 617c66ac9dbSNicholas Bellinger 618c66ac9dbSNicholas Bellinger static struct t10_pr_registration *__core_scsi3_do_alloc_registration( 619c66ac9dbSNicholas Bellinger struct se_device *dev, 620c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 62179dc9c9eSNicholas Bellinger struct se_lun *lun, 6223ccd6e83SNicholas Bellinger struct se_dev_entry *dest_deve, 623f2d30680SHannes Reinecke u64 mapped_lun, 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; 6443ccd6e83SNicholas Bellinger /* 6453ccd6e83SNicholas Bellinger * For destination registrations for ALL_TG_PT=1 and SPEC_I_PT=1, 6463ccd6e83SNicholas Bellinger * the se_dev_entry->pr_ref will have been already obtained by 6473ccd6e83SNicholas Bellinger * core_get_se_deve_from_rtpi() or __core_scsi3_alloc_registration(). 6483ccd6e83SNicholas Bellinger * 6493ccd6e83SNicholas Bellinger * Otherwise, locate se_dev_entry now and obtain a reference until 6503ccd6e83SNicholas Bellinger * registration completes in __core_scsi3_add_registration(). 6513ccd6e83SNicholas Bellinger */ 6523ccd6e83SNicholas Bellinger if (dest_deve) { 6533ccd6e83SNicholas Bellinger pr_reg->pr_reg_deve = dest_deve; 6543ccd6e83SNicholas Bellinger } else { 6553ccd6e83SNicholas Bellinger rcu_read_lock(); 6563ccd6e83SNicholas Bellinger pr_reg->pr_reg_deve = target_nacl_find_deve(nacl, mapped_lun); 6573ccd6e83SNicholas Bellinger if (!pr_reg->pr_reg_deve) { 6583ccd6e83SNicholas Bellinger rcu_read_unlock(); 6593ccd6e83SNicholas Bellinger pr_err("Unable to locate PR deve %s mapped_lun: %llu\n", 6603ccd6e83SNicholas Bellinger nacl->initiatorname, mapped_lun); 6613ccd6e83SNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 6623ccd6e83SNicholas Bellinger return NULL; 6633ccd6e83SNicholas Bellinger } 6643ccd6e83SNicholas Bellinger kref_get(&pr_reg->pr_reg_deve->pr_kref); 6653ccd6e83SNicholas Bellinger rcu_read_unlock(); 6663ccd6e83SNicholas Bellinger } 66779dc9c9eSNicholas Bellinger pr_reg->pr_res_mapped_lun = mapped_lun; 66879dc9c9eSNicholas Bellinger pr_reg->pr_aptpl_target_lun = lun->unpacked_lun; 669adf653f9SChristoph Hellwig pr_reg->tg_pt_sep_rtpi = lun->lun_rtpi; 670c66ac9dbSNicholas Bellinger pr_reg->pr_res_key = sa_res_key; 671c66ac9dbSNicholas Bellinger pr_reg->pr_reg_all_tg_pt = all_tg_pt; 672c66ac9dbSNicholas Bellinger pr_reg->pr_reg_aptpl = aptpl; 673c66ac9dbSNicholas Bellinger /* 674c66ac9dbSNicholas Bellinger * If an ISID value for this SCSI Initiator Port exists, 675c66ac9dbSNicholas Bellinger * save it to the registration now. 676c66ac9dbSNicholas Bellinger */ 677c66ac9dbSNicholas Bellinger if (isid != NULL) { 678c66ac9dbSNicholas Bellinger pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid); 679c66ac9dbSNicholas Bellinger snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid); 680c66ac9dbSNicholas Bellinger pr_reg->isid_present_at_reg = 1; 681c66ac9dbSNicholas Bellinger } 682c66ac9dbSNicholas Bellinger 683c66ac9dbSNicholas Bellinger return pr_reg; 684c66ac9dbSNicholas Bellinger } 685c66ac9dbSNicholas Bellinger 686c66ac9dbSNicholas Bellinger static int core_scsi3_lunacl_depend_item(struct se_dev_entry *); 687c66ac9dbSNicholas Bellinger static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *); 688c66ac9dbSNicholas Bellinger 689c66ac9dbSNicholas Bellinger /* 690c66ac9dbSNicholas Bellinger * Function used for handling PR registrations for ALL_TG_PT=1 and ALL_TG_PT=0 691c66ac9dbSNicholas Bellinger * modes. 692c66ac9dbSNicholas Bellinger */ 693c66ac9dbSNicholas Bellinger static struct t10_pr_registration *__core_scsi3_alloc_registration( 694c66ac9dbSNicholas Bellinger struct se_device *dev, 695c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 69679dc9c9eSNicholas Bellinger struct se_lun *lun, 697c66ac9dbSNicholas Bellinger struct se_dev_entry *deve, 698f2d30680SHannes Reinecke u64 mapped_lun, 699c66ac9dbSNicholas Bellinger unsigned char *isid, 700c66ac9dbSNicholas Bellinger u64 sa_res_key, 701c66ac9dbSNicholas Bellinger int all_tg_pt, 702c66ac9dbSNicholas Bellinger int aptpl) 703c66ac9dbSNicholas Bellinger { 704c66ac9dbSNicholas Bellinger struct se_dev_entry *deve_tmp; 705c66ac9dbSNicholas Bellinger struct se_node_acl *nacl_tmp; 70679dc9c9eSNicholas Bellinger struct se_lun_acl *lacl_tmp; 707adf653f9SChristoph Hellwig struct se_lun *lun_tmp, *next, *dest_lun; 7089ac8928eSChristoph Hellwig const struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; 709c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_atp, *pr_reg_tmp, *pr_reg_tmp_safe; 710c66ac9dbSNicholas Bellinger int ret; 711c66ac9dbSNicholas Bellinger /* 712c66ac9dbSNicholas Bellinger * Create a registration for the I_T Nexus upon which the 713c66ac9dbSNicholas Bellinger * PROUT REGISTER was received. 714c66ac9dbSNicholas Bellinger */ 71579dc9c9eSNicholas Bellinger pr_reg = __core_scsi3_do_alloc_registration(dev, nacl, lun, deve, mapped_lun, 71679dc9c9eSNicholas Bellinger isid, sa_res_key, all_tg_pt, 71779dc9c9eSNicholas Bellinger aptpl); 7186708bb27SAndy Grover if (!pr_reg) 719c66ac9dbSNicholas Bellinger return NULL; 720c66ac9dbSNicholas Bellinger /* 721c66ac9dbSNicholas Bellinger * Return pointer to pr_reg for ALL_TG_PT=0 722c66ac9dbSNicholas Bellinger */ 7236708bb27SAndy Grover if (!all_tg_pt) 724c66ac9dbSNicholas Bellinger return pr_reg; 725c66ac9dbSNicholas Bellinger /* 726c66ac9dbSNicholas Bellinger * Create list of matching SCSI Initiator Port registrations 727c66ac9dbSNicholas Bellinger * for ALL_TG_PT=1 728c66ac9dbSNicholas Bellinger */ 729c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 730adf653f9SChristoph Hellwig list_for_each_entry_safe(lun_tmp, next, &dev->dev_sep_list, lun_dev_link) { 7319e37d042SNicholas Bellinger if (!percpu_ref_tryget_live(&lun_tmp->lun_ref)) 7329e37d042SNicholas Bellinger continue; 733c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 734c66ac9dbSNicholas Bellinger 7351adff1b3SNicholas Bellinger spin_lock(&lun_tmp->lun_deve_lock); 736adf653f9SChristoph Hellwig list_for_each_entry(deve_tmp, &lun_tmp->lun_deve_list, lun_link) { 737c66ac9dbSNicholas Bellinger /* 738c66ac9dbSNicholas Bellinger * This pointer will be NULL for demo mode MappedLUNs 739125d0119SHannes Reinecke * that have not been make explicit via a ConfigFS 740c66ac9dbSNicholas Bellinger * MappedLUN group for the SCSI Initiator Node ACL. 741c66ac9dbSNicholas Bellinger */ 7426708bb27SAndy Grover if (!deve_tmp->se_lun_acl) 743c66ac9dbSNicholas Bellinger continue; 744c66ac9dbSNicholas Bellinger 74579dc9c9eSNicholas Bellinger lacl_tmp = rcu_dereference_check(deve_tmp->se_lun_acl, 746adf653f9SChristoph Hellwig lockdep_is_held(&lun_tmp->lun_deve_lock)); 74779dc9c9eSNicholas Bellinger nacl_tmp = lacl_tmp->se_lun_nacl; 748c66ac9dbSNicholas Bellinger /* 749c66ac9dbSNicholas Bellinger * Skip the matching struct se_node_acl that is allocated 750c66ac9dbSNicholas Bellinger * above.. 751c66ac9dbSNicholas Bellinger */ 752c66ac9dbSNicholas Bellinger if (nacl == nacl_tmp) 753c66ac9dbSNicholas Bellinger continue; 754c66ac9dbSNicholas Bellinger /* 755c66ac9dbSNicholas Bellinger * Only perform PR registrations for target ports on 756c66ac9dbSNicholas Bellinger * the same fabric module as the REGISTER w/ ALL_TG_PT=1 757c66ac9dbSNicholas Bellinger * arrived. 758c66ac9dbSNicholas Bellinger */ 759c66ac9dbSNicholas Bellinger if (tfo != nacl_tmp->se_tpg->se_tpg_tfo) 760c66ac9dbSNicholas Bellinger continue; 761c66ac9dbSNicholas Bellinger /* 762c66ac9dbSNicholas Bellinger * Look for a matching Initiator Node ACL in ASCII format 763c66ac9dbSNicholas Bellinger */ 764c66ac9dbSNicholas Bellinger if (strcmp(nacl->initiatorname, nacl_tmp->initiatorname)) 765c66ac9dbSNicholas Bellinger continue; 766c66ac9dbSNicholas Bellinger 76729a05deeSNicholas Bellinger kref_get(&deve_tmp->pr_kref); 7681adff1b3SNicholas Bellinger spin_unlock(&lun_tmp->lun_deve_lock); 769c66ac9dbSNicholas Bellinger /* 770c66ac9dbSNicholas Bellinger * Grab a configfs group dependency that is released 771c66ac9dbSNicholas Bellinger * for the exception path at label out: below, or upon 772c66ac9dbSNicholas Bellinger * completion of adding ALL_TG_PT=1 registrations in 773c66ac9dbSNicholas Bellinger * __core_scsi3_add_registration() 774c66ac9dbSNicholas Bellinger */ 775c66ac9dbSNicholas Bellinger ret = core_scsi3_lunacl_depend_item(deve_tmp); 776c66ac9dbSNicholas Bellinger if (ret < 0) { 7776708bb27SAndy Grover pr_err("core_scsi3_lunacl_depend" 778c66ac9dbSNicholas Bellinger "_item() failed\n"); 7799e37d042SNicholas Bellinger percpu_ref_put(&lun_tmp->lun_ref); 78029a05deeSNicholas Bellinger kref_put(&deve_tmp->pr_kref, target_pr_kref_release); 781c66ac9dbSNicholas Bellinger goto out; 782c66ac9dbSNicholas Bellinger } 783c66ac9dbSNicholas Bellinger /* 784c66ac9dbSNicholas Bellinger * Located a matching SCSI Initiator Port on a different 785c66ac9dbSNicholas Bellinger * port, allocate the pr_reg_atp and attach it to the 786c66ac9dbSNicholas Bellinger * pr_reg->pr_reg_atp_list that will be processed once 787c66ac9dbSNicholas Bellinger * the original *pr_reg is processed in 788c66ac9dbSNicholas Bellinger * __core_scsi3_add_registration() 789c66ac9dbSNicholas Bellinger */ 790adf653f9SChristoph Hellwig dest_lun = rcu_dereference_check(deve_tmp->se_lun, 7912c935bc5SPeter Zijlstra kref_read(&deve_tmp->pr_kref) != 0); 79279dc9c9eSNicholas Bellinger 793c66ac9dbSNicholas Bellinger pr_reg_atp = __core_scsi3_do_alloc_registration(dev, 794adf653f9SChristoph Hellwig nacl_tmp, dest_lun, deve_tmp, 79579dc9c9eSNicholas Bellinger deve_tmp->mapped_lun, NULL, 796c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl); 7976708bb27SAndy Grover if (!pr_reg_atp) { 7989e37d042SNicholas Bellinger percpu_ref_put(&lun_tmp->lun_ref); 799c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(deve_tmp); 800c66ac9dbSNicholas Bellinger goto out; 801c66ac9dbSNicholas Bellinger } 802c66ac9dbSNicholas Bellinger 803c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg_atp->pr_reg_atp_mem_list, 804c66ac9dbSNicholas Bellinger &pr_reg->pr_reg_atp_list); 8051adff1b3SNicholas Bellinger spin_lock(&lun_tmp->lun_deve_lock); 806c66ac9dbSNicholas Bellinger } 8071adff1b3SNicholas Bellinger spin_unlock(&lun_tmp->lun_deve_lock); 808c66ac9dbSNicholas Bellinger 809c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 8109e37d042SNicholas Bellinger percpu_ref_put(&lun_tmp->lun_ref); 811c66ac9dbSNicholas Bellinger } 812c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 813c66ac9dbSNicholas Bellinger 814c66ac9dbSNicholas Bellinger return pr_reg; 815c66ac9dbSNicholas Bellinger out: 816c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, 817c66ac9dbSNicholas Bellinger &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) { 818c66ac9dbSNicholas Bellinger list_del(&pr_reg_tmp->pr_reg_atp_mem_list); 819c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); 820c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp); 821c66ac9dbSNicholas Bellinger } 822c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 823c66ac9dbSNicholas Bellinger return NULL; 824c66ac9dbSNicholas Bellinger } 825c66ac9dbSNicholas Bellinger 826c66ac9dbSNicholas Bellinger int core_scsi3_alloc_aptpl_registration( 827e3d6f909SAndy Grover struct t10_reservation *pr_tmpl, 828c66ac9dbSNicholas Bellinger u64 sa_res_key, 829c66ac9dbSNicholas Bellinger unsigned char *i_port, 830c66ac9dbSNicholas Bellinger unsigned char *isid, 831f2d30680SHannes Reinecke u64 mapped_lun, 832c66ac9dbSNicholas Bellinger unsigned char *t_port, 833c66ac9dbSNicholas Bellinger u16 tpgt, 834f2d30680SHannes Reinecke u64 target_lun, 835c66ac9dbSNicholas Bellinger int res_holder, 836c66ac9dbSNicholas Bellinger int all_tg_pt, 837c66ac9dbSNicholas Bellinger u8 type) 838c66ac9dbSNicholas Bellinger { 839c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 840c66ac9dbSNicholas Bellinger 8416708bb27SAndy Grover if (!i_port || !t_port || !sa_res_key) { 8426708bb27SAndy Grover pr_err("Illegal parameters for APTPL registration\n"); 843e3d6f909SAndy Grover return -EINVAL; 844c66ac9dbSNicholas Bellinger } 845c66ac9dbSNicholas Bellinger 846c66ac9dbSNicholas Bellinger pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_KERNEL); 8476708bb27SAndy Grover if (!pr_reg) { 8486708bb27SAndy Grover pr_err("Unable to allocate struct t10_pr_registration\n"); 849e3d6f909SAndy Grover return -ENOMEM; 850c66ac9dbSNicholas Bellinger } 851c66ac9dbSNicholas Bellinger 852c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_list); 853c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list); 854c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list); 855c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list); 856c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list); 857c66ac9dbSNicholas Bellinger atomic_set(&pr_reg->pr_res_holders, 0); 858c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = NULL; 859c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve = NULL; 860c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun = mapped_lun; 861c66ac9dbSNicholas Bellinger pr_reg->pr_aptpl_target_lun = target_lun; 862c66ac9dbSNicholas Bellinger pr_reg->pr_res_key = sa_res_key; 863c66ac9dbSNicholas Bellinger pr_reg->pr_reg_all_tg_pt = all_tg_pt; 864c66ac9dbSNicholas Bellinger pr_reg->pr_reg_aptpl = 1; 865c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope = 0; /* Always LUN_SCOPE */ 866c66ac9dbSNicholas Bellinger pr_reg->pr_res_type = type; 867c66ac9dbSNicholas Bellinger /* 868c66ac9dbSNicholas Bellinger * If an ISID value had been saved in APTPL metadata for this 869c66ac9dbSNicholas Bellinger * SCSI Initiator Port, restore it now. 870c66ac9dbSNicholas Bellinger */ 871c66ac9dbSNicholas Bellinger if (isid != NULL) { 872c66ac9dbSNicholas Bellinger pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid); 873c66ac9dbSNicholas Bellinger snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid); 874c66ac9dbSNicholas Bellinger pr_reg->isid_present_at_reg = 1; 875c66ac9dbSNicholas Bellinger } 876c66ac9dbSNicholas Bellinger /* 877c66ac9dbSNicholas Bellinger * Copy the i_port and t_port information from caller. 878c66ac9dbSNicholas Bellinger */ 879c66ac9dbSNicholas Bellinger snprintf(pr_reg->pr_iport, PR_APTPL_MAX_IPORT_LEN, "%s", i_port); 880c66ac9dbSNicholas Bellinger snprintf(pr_reg->pr_tport, PR_APTPL_MAX_TPORT_LEN, "%s", t_port); 881c66ac9dbSNicholas Bellinger pr_reg->pr_reg_tpgt = tpgt; 882c66ac9dbSNicholas Bellinger /* 883c66ac9dbSNicholas Bellinger * Set pr_res_holder from caller, the pr_reg who is the reservation 884c66ac9dbSNicholas Bellinger * holder will get it's pointer set in core_scsi3_aptpl_reserve() once 885c66ac9dbSNicholas Bellinger * the Initiator Node LUN ACL from the fabric module is created for 886c66ac9dbSNicholas Bellinger * this registration. 887c66ac9dbSNicholas Bellinger */ 888c66ac9dbSNicholas Bellinger pr_reg->pr_res_holder = res_holder; 889c66ac9dbSNicholas Bellinger 890c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg->pr_reg_aptpl_list, &pr_tmpl->aptpl_reg_list); 8916708bb27SAndy Grover pr_debug("SPC-3 PR APTPL Successfully added registration%s from" 892c66ac9dbSNicholas Bellinger " metadata\n", (res_holder) ? "+reservation" : ""); 893c66ac9dbSNicholas Bellinger return 0; 894c66ac9dbSNicholas Bellinger } 895c66ac9dbSNicholas Bellinger 896c66ac9dbSNicholas Bellinger static void core_scsi3_aptpl_reserve( 897c66ac9dbSNicholas Bellinger struct se_device *dev, 898c66ac9dbSNicholas Bellinger struct se_portal_group *tpg, 899c66ac9dbSNicholas Bellinger struct se_node_acl *node_acl, 900c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg) 901c66ac9dbSNicholas Bellinger { 902c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 903c66ac9dbSNicholas Bellinger 904c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 905d2843c17SAndy Grover core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 906c66ac9dbSNicholas Bellinger 907c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 908c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = pr_reg; 909c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 910c66ac9dbSNicholas Bellinger 9116708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: APTPL RESERVE created" 912c66ac9dbSNicholas Bellinger " new reservation holder TYPE: %s ALL_TG_PT: %d\n", 913e3d6f909SAndy Grover tpg->se_tpg_tfo->get_fabric_name(), 914c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg->pr_res_type), 915c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); 9166708bb27SAndy Grover pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n", 917e3d6f909SAndy Grover tpg->se_tpg_tfo->get_fabric_name(), node_acl->initiatorname, 918d2843c17SAndy Grover i_buf); 919c66ac9dbSNicholas Bellinger } 920c66ac9dbSNicholas Bellinger 921c66ac9dbSNicholas Bellinger static void __core_scsi3_add_registration(struct se_device *, struct se_node_acl *, 92233ce6a87SAndy Grover struct t10_pr_registration *, enum register_type, int); 923c66ac9dbSNicholas Bellinger 924c66ac9dbSNicholas Bellinger static int __core_scsi3_check_aptpl_registration( 925c66ac9dbSNicholas Bellinger struct se_device *dev, 926c66ac9dbSNicholas Bellinger struct se_portal_group *tpg, 927c66ac9dbSNicholas Bellinger struct se_lun *lun, 928f2d30680SHannes Reinecke u64 target_lun, 929c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 930f2d30680SHannes Reinecke u64 mapped_lun) 931c66ac9dbSNicholas Bellinger { 932c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp; 9330fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 934c66ac9dbSNicholas Bellinger unsigned char i_port[PR_APTPL_MAX_IPORT_LEN]; 935c66ac9dbSNicholas Bellinger unsigned char t_port[PR_APTPL_MAX_TPORT_LEN]; 936c66ac9dbSNicholas Bellinger u16 tpgt; 937c66ac9dbSNicholas Bellinger 938c66ac9dbSNicholas Bellinger memset(i_port, 0, PR_APTPL_MAX_IPORT_LEN); 939c66ac9dbSNicholas Bellinger memset(t_port, 0, PR_APTPL_MAX_TPORT_LEN); 940c66ac9dbSNicholas Bellinger /* 941c66ac9dbSNicholas Bellinger * Copy Initiator Port information from struct se_node_acl 942c66ac9dbSNicholas Bellinger */ 943c66ac9dbSNicholas Bellinger snprintf(i_port, PR_APTPL_MAX_IPORT_LEN, "%s", nacl->initiatorname); 944c66ac9dbSNicholas Bellinger snprintf(t_port, PR_APTPL_MAX_TPORT_LEN, "%s", 945e3d6f909SAndy Grover tpg->se_tpg_tfo->tpg_get_wwn(tpg)); 946e3d6f909SAndy Grover tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); 947c66ac9dbSNicholas Bellinger /* 948c66ac9dbSNicholas Bellinger * Look for the matching registrations+reservation from those 949c66ac9dbSNicholas Bellinger * created from APTPL metadata. Note that multiple registrations 950c66ac9dbSNicholas Bellinger * may exist for fabrics that use ISIDs in their SCSI Initiator Port 951c66ac9dbSNicholas Bellinger * TransportIDs. 952c66ac9dbSNicholas Bellinger */ 953c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->aptpl_reg_lock); 954c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, 955c66ac9dbSNicholas Bellinger pr_reg_aptpl_list) { 95692404e60SNicholas Bellinger 9576708bb27SAndy Grover if (!strcmp(pr_reg->pr_iport, i_port) && 95829a05deeSNicholas Bellinger (pr_reg->pr_res_mapped_lun == mapped_lun) && 959c66ac9dbSNicholas Bellinger !(strcmp(pr_reg->pr_tport, t_port)) && 960c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_tpgt == tpgt) && 961c66ac9dbSNicholas Bellinger (pr_reg->pr_aptpl_target_lun == target_lun)) { 9623ccd6e83SNicholas Bellinger /* 9633ccd6e83SNicholas Bellinger * Obtain the ->pr_reg_deve pointer + reference, that 9643ccd6e83SNicholas Bellinger * is released by __core_scsi3_add_registration() below. 9653ccd6e83SNicholas Bellinger */ 9663ccd6e83SNicholas Bellinger rcu_read_lock(); 9673ccd6e83SNicholas Bellinger pr_reg->pr_reg_deve = target_nacl_find_deve(nacl, mapped_lun); 9683ccd6e83SNicholas Bellinger if (!pr_reg->pr_reg_deve) { 9693ccd6e83SNicholas Bellinger pr_err("Unable to locate PR APTPL %s mapped_lun:" 9703ccd6e83SNicholas Bellinger " %llu\n", nacl->initiatorname, mapped_lun); 9713ccd6e83SNicholas Bellinger rcu_read_unlock(); 9723ccd6e83SNicholas Bellinger continue; 9733ccd6e83SNicholas Bellinger } 9743ccd6e83SNicholas Bellinger kref_get(&pr_reg->pr_reg_deve->pr_kref); 9753ccd6e83SNicholas Bellinger rcu_read_unlock(); 976c66ac9dbSNicholas Bellinger 977c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = nacl; 978adf653f9SChristoph Hellwig pr_reg->tg_pt_sep_rtpi = lun->lun_rtpi; 979c66ac9dbSNicholas Bellinger list_del(&pr_reg->pr_reg_aptpl_list); 980c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->aptpl_reg_lock); 981c66ac9dbSNicholas Bellinger /* 982c66ac9dbSNicholas Bellinger * At this point all of the pointers in *pr_reg will 983c66ac9dbSNicholas Bellinger * be setup, so go ahead and add the registration. 984c66ac9dbSNicholas Bellinger */ 985c66ac9dbSNicholas Bellinger __core_scsi3_add_registration(dev, nacl, pr_reg, 0, 0); 986c66ac9dbSNicholas Bellinger /* 987c66ac9dbSNicholas Bellinger * If this registration is the reservation holder, 988c66ac9dbSNicholas Bellinger * make that happen now.. 989c66ac9dbSNicholas Bellinger */ 990c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_holder) 991c66ac9dbSNicholas Bellinger core_scsi3_aptpl_reserve(dev, tpg, 992c66ac9dbSNicholas Bellinger nacl, pr_reg); 993c66ac9dbSNicholas Bellinger /* 994c66ac9dbSNicholas Bellinger * Reenable pr_aptpl_active to accept new metadata 995c66ac9dbSNicholas Bellinger * updates once the SCSI device is active again.. 996c66ac9dbSNicholas Bellinger */ 997c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->aptpl_reg_lock); 998c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_active = 1; 999c66ac9dbSNicholas Bellinger } 1000c66ac9dbSNicholas Bellinger } 1001c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->aptpl_reg_lock); 1002c66ac9dbSNicholas Bellinger 1003c66ac9dbSNicholas Bellinger return 0; 1004c66ac9dbSNicholas Bellinger } 1005c66ac9dbSNicholas Bellinger 1006c66ac9dbSNicholas Bellinger int core_scsi3_check_aptpl_registration( 1007c66ac9dbSNicholas Bellinger struct se_device *dev, 1008c66ac9dbSNicholas Bellinger struct se_portal_group *tpg, 1009c66ac9dbSNicholas Bellinger struct se_lun *lun, 1010e2480563SNicholas Bellinger struct se_node_acl *nacl, 1011f2d30680SHannes Reinecke u64 mapped_lun) 1012c66ac9dbSNicholas Bellinger { 1013d977f437SChristoph Hellwig if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1014c66ac9dbSNicholas Bellinger return 0; 1015c66ac9dbSNicholas Bellinger 1016c66ac9dbSNicholas Bellinger return __core_scsi3_check_aptpl_registration(dev, tpg, lun, 101729a05deeSNicholas Bellinger lun->unpacked_lun, nacl, 101829a05deeSNicholas Bellinger mapped_lun); 1019c66ac9dbSNicholas Bellinger } 1020c66ac9dbSNicholas Bellinger 1021c66ac9dbSNicholas Bellinger static void __core_scsi3_dump_registration( 10229ac8928eSChristoph Hellwig const struct target_core_fabric_ops *tfo, 1023c66ac9dbSNicholas Bellinger struct se_device *dev, 1024c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 1025c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 102633ce6a87SAndy Grover enum register_type register_type) 1027c66ac9dbSNicholas Bellinger { 1028c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg = nacl->se_tpg; 1029c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 1030c66ac9dbSNicholas Bellinger 1031c66ac9dbSNicholas Bellinger memset(&i_buf[0], 0, PR_REG_ISID_ID_LEN); 1032d2843c17SAndy Grover core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1033c66ac9dbSNicholas Bellinger 10346708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: REGISTER%s Initiator" 103533ce6a87SAndy Grover " Node: %s%s\n", tfo->get_fabric_name(), (register_type == REGISTER_AND_MOVE) ? 103633ce6a87SAndy Grover "_AND_MOVE" : (register_type == REGISTER_AND_IGNORE_EXISTING_KEY) ? 1037c66ac9dbSNicholas Bellinger "_AND_IGNORE_EXISTING_KEY" : "", nacl->initiatorname, 1038d2843c17SAndy Grover i_buf); 10396708bb27SAndy Grover pr_debug("SPC-3 PR [%s] registration on Target Port: %s,0x%04x\n", 1040c66ac9dbSNicholas Bellinger tfo->get_fabric_name(), tfo->tpg_get_wwn(se_tpg), 1041c66ac9dbSNicholas Bellinger tfo->tpg_get_tag(se_tpg)); 10426708bb27SAndy Grover pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target" 1043c66ac9dbSNicholas Bellinger " Port(s)\n", tfo->get_fabric_name(), 1044c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE", 1045e3d6f909SAndy Grover dev->transport->name); 10466708bb27SAndy Grover pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:" 1047c66ac9dbSNicholas Bellinger " 0x%08x APTPL: %d\n", tfo->get_fabric_name(), 1048c66ac9dbSNicholas Bellinger pr_reg->pr_res_key, pr_reg->pr_res_generation, 1049c66ac9dbSNicholas Bellinger pr_reg->pr_reg_aptpl); 1050c66ac9dbSNicholas Bellinger } 1051c66ac9dbSNicholas Bellinger 1052c66ac9dbSNicholas Bellinger static void __core_scsi3_add_registration( 1053c66ac9dbSNicholas Bellinger struct se_device *dev, 1054c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 1055c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 105633ce6a87SAndy Grover enum register_type register_type, 1057c66ac9dbSNicholas Bellinger int register_move) 1058c66ac9dbSNicholas Bellinger { 10599ac8928eSChristoph Hellwig const struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; 1060c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe; 10610fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 106280bfdfa9SNicholas Bellinger struct se_dev_entry *deve; 1063c66ac9dbSNicholas Bellinger 1064c66ac9dbSNicholas Bellinger /* 1065c66ac9dbSNicholas Bellinger * Increment PRgeneration counter for struct se_device upon a successful 1066c66ac9dbSNicholas Bellinger * REGISTER, see spc4r17 section 6.3.2 READ_KEYS service action 1067c66ac9dbSNicholas Bellinger * 1068c66ac9dbSNicholas Bellinger * Also, when register_move = 1 for PROUT REGISTER_AND_MOVE service 1069c66ac9dbSNicholas Bellinger * action, the struct se_device->dev_reservation_lock will already be held, 1070c66ac9dbSNicholas Bellinger * so we do not call core_scsi3_pr_generation() which grabs the lock 1071c66ac9dbSNicholas Bellinger * for the REGISTER. 1072c66ac9dbSNicholas Bellinger */ 1073c66ac9dbSNicholas Bellinger pr_reg->pr_res_generation = (register_move) ? 10740fd97ccfSChristoph Hellwig dev->t10_pr.pr_generation++ : 1075c66ac9dbSNicholas Bellinger core_scsi3_pr_generation(dev); 1076c66ac9dbSNicholas Bellinger 1077c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1078c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg->pr_reg_list, &pr_tmpl->registration_list); 1079c66ac9dbSNicholas Bellinger 1080c66ac9dbSNicholas Bellinger __core_scsi3_dump_registration(tfo, dev, nacl, pr_reg, register_type); 1081c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1082c66ac9dbSNicholas Bellinger /* 1083c66ac9dbSNicholas Bellinger * Skip extra processing for ALL_TG_PT=0 or REGISTER_AND_MOVE. 1084c66ac9dbSNicholas Bellinger */ 10856708bb27SAndy Grover if (!pr_reg->pr_reg_all_tg_pt || register_move) 10863ccd6e83SNicholas Bellinger goto out; 1087c66ac9dbSNicholas Bellinger /* 1088c66ac9dbSNicholas Bellinger * Walk pr_reg->pr_reg_atp_list and add registrations for ALL_TG_PT=1 1089c66ac9dbSNicholas Bellinger * allocated in __core_scsi3_alloc_registration() 1090c66ac9dbSNicholas Bellinger */ 1091c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, 1092c66ac9dbSNicholas Bellinger &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) { 109380bfdfa9SNicholas Bellinger struct se_node_acl *nacl_tmp = pr_reg_tmp->pr_reg_nacl; 109480bfdfa9SNicholas Bellinger 1095c66ac9dbSNicholas Bellinger list_del(&pr_reg_tmp->pr_reg_atp_mem_list); 1096c66ac9dbSNicholas Bellinger 1097c66ac9dbSNicholas Bellinger pr_reg_tmp->pr_res_generation = core_scsi3_pr_generation(dev); 1098c66ac9dbSNicholas Bellinger 1099c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1100c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg_tmp->pr_reg_list, 1101c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list); 1102c66ac9dbSNicholas Bellinger 110380bfdfa9SNicholas Bellinger __core_scsi3_dump_registration(tfo, dev, nacl_tmp, pr_reg_tmp, 1104c66ac9dbSNicholas Bellinger register_type); 1105c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 11063ccd6e83SNicholas Bellinger /* 11073ccd6e83SNicholas Bellinger * Drop configfs group dependency reference and deve->pr_kref 11083ccd6e83SNicholas Bellinger * obtained from __core_scsi3_alloc_registration() code. 11093ccd6e83SNicholas Bellinger */ 111080bfdfa9SNicholas Bellinger rcu_read_lock(); 111180bfdfa9SNicholas Bellinger deve = pr_reg_tmp->pr_reg_deve; 11123ccd6e83SNicholas Bellinger if (deve) { 111380bfdfa9SNicholas Bellinger set_bit(DEF_PR_REG_ACTIVE, &deve->deve_flags); 11143ccd6e83SNicholas Bellinger core_scsi3_lunacl_undepend_item(deve); 11153ccd6e83SNicholas Bellinger pr_reg_tmp->pr_reg_deve = NULL; 1116c66ac9dbSNicholas Bellinger } 11173ccd6e83SNicholas Bellinger rcu_read_unlock(); 11183ccd6e83SNicholas Bellinger } 11193ccd6e83SNicholas Bellinger out: 11203ccd6e83SNicholas Bellinger /* 11213ccd6e83SNicholas Bellinger * Drop deve->pr_kref obtained in __core_scsi3_do_alloc_registration() 11223ccd6e83SNicholas Bellinger */ 11233ccd6e83SNicholas Bellinger rcu_read_lock(); 11243ccd6e83SNicholas Bellinger deve = pr_reg->pr_reg_deve; 11253ccd6e83SNicholas Bellinger if (deve) { 11263ccd6e83SNicholas Bellinger set_bit(DEF_PR_REG_ACTIVE, &deve->deve_flags); 11273ccd6e83SNicholas Bellinger kref_put(&deve->pr_kref, target_pr_kref_release); 11283ccd6e83SNicholas Bellinger pr_reg->pr_reg_deve = NULL; 11293ccd6e83SNicholas Bellinger } 11303ccd6e83SNicholas Bellinger rcu_read_unlock(); 1131c66ac9dbSNicholas Bellinger } 1132c66ac9dbSNicholas Bellinger 1133c66ac9dbSNicholas Bellinger static int core_scsi3_alloc_registration( 1134c66ac9dbSNicholas Bellinger struct se_device *dev, 1135c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 113679dc9c9eSNicholas Bellinger struct se_lun *lun, 1137c66ac9dbSNicholas Bellinger struct se_dev_entry *deve, 1138f2d30680SHannes Reinecke u64 mapped_lun, 1139c66ac9dbSNicholas Bellinger unsigned char *isid, 1140c66ac9dbSNicholas Bellinger u64 sa_res_key, 1141c66ac9dbSNicholas Bellinger int all_tg_pt, 1142c66ac9dbSNicholas Bellinger int aptpl, 114333ce6a87SAndy Grover enum register_type register_type, 1144c66ac9dbSNicholas Bellinger int register_move) 1145c66ac9dbSNicholas Bellinger { 1146c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 1147c66ac9dbSNicholas Bellinger 114879dc9c9eSNicholas Bellinger pr_reg = __core_scsi3_alloc_registration(dev, nacl, lun, deve, mapped_lun, 114979dc9c9eSNicholas Bellinger isid, sa_res_key, all_tg_pt, 115079dc9c9eSNicholas Bellinger aptpl); 11516708bb27SAndy Grover if (!pr_reg) 1152e3d6f909SAndy Grover return -EPERM; 1153c66ac9dbSNicholas Bellinger 1154c66ac9dbSNicholas Bellinger __core_scsi3_add_registration(dev, nacl, pr_reg, 1155c66ac9dbSNicholas Bellinger register_type, register_move); 1156c66ac9dbSNicholas Bellinger return 0; 1157c66ac9dbSNicholas Bellinger } 1158c66ac9dbSNicholas Bellinger 1159c66ac9dbSNicholas Bellinger static struct t10_pr_registration *__core_scsi3_locate_pr_reg( 1160c66ac9dbSNicholas Bellinger struct se_device *dev, 1161c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 1162c66ac9dbSNicholas Bellinger unsigned char *isid) 1163c66ac9dbSNicholas Bellinger { 11640fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 1165c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp; 1166c66ac9dbSNicholas Bellinger struct se_portal_group *tpg; 1167c66ac9dbSNicholas Bellinger 1168c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1169c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 1170c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 1171c66ac9dbSNicholas Bellinger /* 1172c66ac9dbSNicholas Bellinger * First look for a matching struct se_node_acl 1173c66ac9dbSNicholas Bellinger */ 1174c66ac9dbSNicholas Bellinger if (pr_reg->pr_reg_nacl != nacl) 1175c66ac9dbSNicholas Bellinger continue; 1176c66ac9dbSNicholas Bellinger 1177c66ac9dbSNicholas Bellinger tpg = pr_reg->pr_reg_nacl->se_tpg; 1178c66ac9dbSNicholas Bellinger /* 1179c66ac9dbSNicholas Bellinger * If this registration does NOT contain a fabric provided 1180c66ac9dbSNicholas Bellinger * ISID, then we have found a match. 1181c66ac9dbSNicholas Bellinger */ 11826708bb27SAndy Grover if (!pr_reg->isid_present_at_reg) { 1183c66ac9dbSNicholas Bellinger /* 1184c66ac9dbSNicholas Bellinger * Determine if this SCSI device server requires that 1185c66ac9dbSNicholas Bellinger * SCSI Intiatior TransportID w/ ISIDs is enforced 1186c66ac9dbSNicholas Bellinger * for fabric modules (iSCSI) requiring them. 1187c66ac9dbSNicholas Bellinger */ 1188e3d6f909SAndy Grover if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { 11890fd97ccfSChristoph Hellwig if (dev->dev_attrib.enforce_pr_isids) 1190c66ac9dbSNicholas Bellinger continue; 1191c66ac9dbSNicholas Bellinger } 119233940d09SJoern Engel atomic_inc_mb(&pr_reg->pr_res_holders); 1193c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1194c66ac9dbSNicholas Bellinger return pr_reg; 1195c66ac9dbSNicholas Bellinger } 1196c66ac9dbSNicholas Bellinger /* 1197c66ac9dbSNicholas Bellinger * If the *pr_reg contains a fabric defined ISID for multi-value 1198c66ac9dbSNicholas Bellinger * SCSI Initiator Port TransportIDs, then we expect a valid 1199c66ac9dbSNicholas Bellinger * matching ISID to be provided by the local SCSI Initiator Port. 1200c66ac9dbSNicholas Bellinger */ 12016708bb27SAndy Grover if (!isid) 1202c66ac9dbSNicholas Bellinger continue; 1203c66ac9dbSNicholas Bellinger if (strcmp(isid, pr_reg->pr_reg_isid)) 1204c66ac9dbSNicholas Bellinger continue; 1205c66ac9dbSNicholas Bellinger 120633940d09SJoern Engel atomic_inc_mb(&pr_reg->pr_res_holders); 1207c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1208c66ac9dbSNicholas Bellinger return pr_reg; 1209c66ac9dbSNicholas Bellinger } 1210c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1211c66ac9dbSNicholas Bellinger 1212c66ac9dbSNicholas Bellinger return NULL; 1213c66ac9dbSNicholas Bellinger } 1214c66ac9dbSNicholas Bellinger 1215c66ac9dbSNicholas Bellinger static struct t10_pr_registration *core_scsi3_locate_pr_reg( 1216c66ac9dbSNicholas Bellinger struct se_device *dev, 1217c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 1218c66ac9dbSNicholas Bellinger struct se_session *sess) 1219c66ac9dbSNicholas Bellinger { 1220c66ac9dbSNicholas Bellinger struct se_portal_group *tpg = nacl->se_tpg; 1221c66ac9dbSNicholas Bellinger unsigned char buf[PR_REG_ISID_LEN], *isid_ptr = NULL; 1222c66ac9dbSNicholas Bellinger 1223e3d6f909SAndy Grover if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { 1224c66ac9dbSNicholas Bellinger memset(&buf[0], 0, PR_REG_ISID_LEN); 1225e3d6f909SAndy Grover tpg->se_tpg_tfo->sess_get_initiator_sid(sess, &buf[0], 1226c66ac9dbSNicholas Bellinger PR_REG_ISID_LEN); 1227c66ac9dbSNicholas Bellinger isid_ptr = &buf[0]; 1228c66ac9dbSNicholas Bellinger } 1229c66ac9dbSNicholas Bellinger 1230c66ac9dbSNicholas Bellinger return __core_scsi3_locate_pr_reg(dev, nacl, isid_ptr); 1231c66ac9dbSNicholas Bellinger } 1232c66ac9dbSNicholas Bellinger 1233c66ac9dbSNicholas Bellinger static void core_scsi3_put_pr_reg(struct t10_pr_registration *pr_reg) 1234c66ac9dbSNicholas Bellinger { 123533940d09SJoern Engel atomic_dec_mb(&pr_reg->pr_res_holders); 1236c66ac9dbSNicholas Bellinger } 1237c66ac9dbSNicholas Bellinger 1238125d0119SHannes Reinecke static int core_scsi3_check_implicit_release( 1239c66ac9dbSNicholas Bellinger struct se_device *dev, 1240c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg) 1241c66ac9dbSNicholas Bellinger { 1242c66ac9dbSNicholas Bellinger struct se_node_acl *nacl = pr_reg->pr_reg_nacl; 1243c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_res_holder; 1244c66ac9dbSNicholas Bellinger int ret = 0; 1245c66ac9dbSNicholas Bellinger 1246c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 1247c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 12486708bb27SAndy Grover if (!pr_res_holder) { 1249c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1250c66ac9dbSNicholas Bellinger return ret; 1251c66ac9dbSNicholas Bellinger } 1252c66ac9dbSNicholas Bellinger if (pr_res_holder == pr_reg) { 1253c66ac9dbSNicholas Bellinger /* 1254125d0119SHannes Reinecke * Perform an implicit RELEASE if the registration that 1255c66ac9dbSNicholas Bellinger * is being released is holding the reservation. 1256c66ac9dbSNicholas Bellinger * 1257c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.11.1: 1258c66ac9dbSNicholas Bellinger * 1259c66ac9dbSNicholas Bellinger * e) If the I_T nexus is the persistent reservation holder 1260c66ac9dbSNicholas Bellinger * and the persistent reservation is not an all registrants 1261c66ac9dbSNicholas Bellinger * type, then a PERSISTENT RESERVE OUT command with REGISTER 1262c66ac9dbSNicholas Bellinger * service action or REGISTER AND IGNORE EXISTING KEY 1263c66ac9dbSNicholas Bellinger * service action with the SERVICE ACTION RESERVATION KEY 1264c66ac9dbSNicholas Bellinger * field set to zero (see 5.7.11.3). 1265c66ac9dbSNicholas Bellinger */ 12666c3c9baaSNicholas Bellinger __core_scsi3_complete_pro_release(dev, nacl, pr_reg, 0, 1); 1267c66ac9dbSNicholas Bellinger ret = 1; 1268c66ac9dbSNicholas Bellinger /* 1269c66ac9dbSNicholas Bellinger * For 'All Registrants' reservation types, all existing 1270c66ac9dbSNicholas Bellinger * registrations are still processed as reservation holders 1271c66ac9dbSNicholas Bellinger * in core_scsi3_pr_seq_non_holder() after the initial 1272125d0119SHannes Reinecke * reservation holder is implicitly released here. 1273c66ac9dbSNicholas Bellinger */ 1274c66ac9dbSNicholas Bellinger } else if (pr_reg->pr_reg_all_tg_pt && 1275c66ac9dbSNicholas Bellinger (!strcmp(pr_res_holder->pr_reg_nacl->initiatorname, 1276c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->initiatorname)) && 1277c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_key == pr_reg->pr_res_key)) { 12786708bb27SAndy Grover pr_err("SPC-3 PR: Unable to perform ALL_TG_PT=1" 1279c66ac9dbSNicholas Bellinger " UNREGISTER while existing reservation with matching" 1280c66ac9dbSNicholas Bellinger " key 0x%016Lx is present from another SCSI Initiator" 1281c66ac9dbSNicholas Bellinger " Port\n", pr_reg->pr_res_key); 1282e3d6f909SAndy Grover ret = -EPERM; 1283c66ac9dbSNicholas Bellinger } 1284c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1285c66ac9dbSNicholas Bellinger 1286c66ac9dbSNicholas Bellinger return ret; 1287c66ac9dbSNicholas Bellinger } 1288c66ac9dbSNicholas Bellinger 1289c66ac9dbSNicholas Bellinger /* 1290e3d6f909SAndy Grover * Called with struct t10_reservation->registration_lock held. 1291c66ac9dbSNicholas Bellinger */ 1292c66ac9dbSNicholas Bellinger static void __core_scsi3_free_registration( 1293c66ac9dbSNicholas Bellinger struct se_device *dev, 1294c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 1295c66ac9dbSNicholas Bellinger struct list_head *preempt_and_abort_list, 1296c66ac9dbSNicholas Bellinger int dec_holders) 1297cb0df4d3SBart Van Assche __releases(&pr_tmpl->registration_lock) 1298cb0df4d3SBart Van Assche __acquires(&pr_tmpl->registration_lock) 1299c66ac9dbSNicholas Bellinger { 13009ac8928eSChristoph Hellwig const struct target_core_fabric_ops *tfo = 1301c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 13020fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 130380bfdfa9SNicholas Bellinger struct se_node_acl *nacl = pr_reg->pr_reg_nacl; 130480bfdfa9SNicholas Bellinger struct se_dev_entry *deve; 1305c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 1306c66ac9dbSNicholas Bellinger 1307c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1308d2843c17SAndy Grover core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1309c66ac9dbSNicholas Bellinger 13106c3c9baaSNicholas Bellinger if (!list_empty(&pr_reg->pr_reg_list)) 1311c66ac9dbSNicholas Bellinger list_del(&pr_reg->pr_reg_list); 1312c66ac9dbSNicholas Bellinger /* 1313c66ac9dbSNicholas Bellinger * Caller accessing *pr_reg using core_scsi3_locate_pr_reg(), 1314c66ac9dbSNicholas Bellinger * so call core_scsi3_put_pr_reg() to decrement our reference. 1315c66ac9dbSNicholas Bellinger */ 1316c66ac9dbSNicholas Bellinger if (dec_holders) 1317c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 131880bfdfa9SNicholas Bellinger 131980bfdfa9SNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1320c66ac9dbSNicholas Bellinger /* 1321c66ac9dbSNicholas Bellinger * Wait until all reference from any other I_T nexuses for this 1322c66ac9dbSNicholas Bellinger * *pr_reg have been released. Because list_del() is called above, 1323c66ac9dbSNicholas Bellinger * the last core_scsi3_put_pr_reg(pr_reg) will release this reference 1324c66ac9dbSNicholas Bellinger * count back to zero, and we release *pr_reg. 1325c66ac9dbSNicholas Bellinger */ 1326c66ac9dbSNicholas Bellinger while (atomic_read(&pr_reg->pr_res_holders) != 0) { 13276708bb27SAndy Grover pr_debug("SPC-3 PR [%s] waiting for pr_res_holders\n", 1328c66ac9dbSNicholas Bellinger tfo->get_fabric_name()); 1329c66ac9dbSNicholas Bellinger cpu_relax(); 1330c66ac9dbSNicholas Bellinger } 1331c66ac9dbSNicholas Bellinger 133280bfdfa9SNicholas Bellinger rcu_read_lock(); 133380bfdfa9SNicholas Bellinger deve = target_nacl_find_deve(nacl, pr_reg->pr_res_mapped_lun); 133480bfdfa9SNicholas Bellinger if (deve) 133580bfdfa9SNicholas Bellinger clear_bit(DEF_PR_REG_ACTIVE, &deve->deve_flags); 133680bfdfa9SNicholas Bellinger rcu_read_unlock(); 133780bfdfa9SNicholas Bellinger 133880bfdfa9SNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 13396708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: UNREGISTER Initiator" 1340c66ac9dbSNicholas Bellinger " Node: %s%s\n", tfo->get_fabric_name(), 1341c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->initiatorname, 1342d2843c17SAndy Grover i_buf); 13436708bb27SAndy Grover pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target" 1344c66ac9dbSNicholas Bellinger " Port(s)\n", tfo->get_fabric_name(), 1345c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE", 1346e3d6f909SAndy Grover dev->transport->name); 13476708bb27SAndy Grover pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:" 1348c66ac9dbSNicholas Bellinger " 0x%08x\n", tfo->get_fabric_name(), pr_reg->pr_res_key, 1349c66ac9dbSNicholas Bellinger pr_reg->pr_res_generation); 1350c66ac9dbSNicholas Bellinger 13516708bb27SAndy Grover if (!preempt_and_abort_list) { 1352c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve = NULL; 1353c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = NULL; 1354c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 1355c66ac9dbSNicholas Bellinger return; 1356c66ac9dbSNicholas Bellinger } 1357c66ac9dbSNicholas Bellinger /* 1358c66ac9dbSNicholas Bellinger * For PREEMPT_AND_ABORT, the list of *pr_reg in preempt_and_abort_list 1359c66ac9dbSNicholas Bellinger * are released once the ABORT_TASK_SET has completed.. 1360c66ac9dbSNicholas Bellinger */ 1361c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg->pr_reg_abort_list, preempt_and_abort_list); 1362c66ac9dbSNicholas Bellinger } 1363c66ac9dbSNicholas Bellinger 1364c66ac9dbSNicholas Bellinger void core_scsi3_free_pr_reg_from_nacl( 1365c66ac9dbSNicholas Bellinger struct se_device *dev, 1366c66ac9dbSNicholas Bellinger struct se_node_acl *nacl) 1367c66ac9dbSNicholas Bellinger { 13680fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 1369c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder; 13706c3c9baaSNicholas Bellinger bool free_reg = false; 1371c66ac9dbSNicholas Bellinger /* 1372c66ac9dbSNicholas Bellinger * If the passed se_node_acl matches the reservation holder, 1373c66ac9dbSNicholas Bellinger * release the reservation. 1374c66ac9dbSNicholas Bellinger */ 1375c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 1376c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 1377c66ac9dbSNicholas Bellinger if ((pr_res_holder != NULL) && 13786c3c9baaSNicholas Bellinger (pr_res_holder->pr_reg_nacl == nacl)) { 13796c3c9baaSNicholas Bellinger __core_scsi3_complete_pro_release(dev, nacl, pr_res_holder, 0, 1); 13806c3c9baaSNicholas Bellinger free_reg = true; 13816c3c9baaSNicholas Bellinger } 1382c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1383c66ac9dbSNicholas Bellinger /* 1384c66ac9dbSNicholas Bellinger * Release any registration associated with the struct se_node_acl. 1385c66ac9dbSNicholas Bellinger */ 1386c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 13876c3c9baaSNicholas Bellinger if (pr_res_holder && free_reg) 13886c3c9baaSNicholas Bellinger __core_scsi3_free_registration(dev, pr_res_holder, NULL, 0); 13896c3c9baaSNicholas Bellinger 1390c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 1391c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 1392c66ac9dbSNicholas Bellinger 1393c66ac9dbSNicholas Bellinger if (pr_reg->pr_reg_nacl != nacl) 1394c66ac9dbSNicholas Bellinger continue; 1395c66ac9dbSNicholas Bellinger 1396c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, NULL, 0); 1397c66ac9dbSNicholas Bellinger } 1398c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1399c66ac9dbSNicholas Bellinger } 1400c66ac9dbSNicholas Bellinger 1401c66ac9dbSNicholas Bellinger void core_scsi3_free_all_registrations( 1402c66ac9dbSNicholas Bellinger struct se_device *dev) 1403c66ac9dbSNicholas Bellinger { 14040fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 1405c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder; 1406c66ac9dbSNicholas Bellinger 1407c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 1408c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 1409c66ac9dbSNicholas Bellinger if (pr_res_holder != NULL) { 1410c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 1411c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, pr_res_nacl, 14126c3c9baaSNicholas Bellinger pr_res_holder, 0, 0); 1413c66ac9dbSNicholas Bellinger } 1414c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1415c66ac9dbSNicholas Bellinger 1416c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1417c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 1418c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 1419c66ac9dbSNicholas Bellinger 1420c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, NULL, 0); 1421c66ac9dbSNicholas Bellinger } 1422c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1423c66ac9dbSNicholas Bellinger 1424c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->aptpl_reg_lock); 1425c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, 1426c66ac9dbSNicholas Bellinger pr_reg_aptpl_list) { 1427c66ac9dbSNicholas Bellinger list_del(&pr_reg->pr_reg_aptpl_list); 1428c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 1429c66ac9dbSNicholas Bellinger } 1430c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->aptpl_reg_lock); 1431c66ac9dbSNicholas Bellinger } 1432c66ac9dbSNicholas Bellinger 1433c66ac9dbSNicholas Bellinger static int core_scsi3_tpg_depend_item(struct se_portal_group *tpg) 1434c66ac9dbSNicholas Bellinger { 1435d588cf8fSChristoph Hellwig return target_depend_item(&tpg->tpg_group.cg_item); 1436c66ac9dbSNicholas Bellinger } 1437c66ac9dbSNicholas Bellinger 1438c66ac9dbSNicholas Bellinger static void core_scsi3_tpg_undepend_item(struct se_portal_group *tpg) 1439c66ac9dbSNicholas Bellinger { 1440d588cf8fSChristoph Hellwig target_undepend_item(&tpg->tpg_group.cg_item); 144133940d09SJoern Engel atomic_dec_mb(&tpg->tpg_pr_ref_count); 1442c66ac9dbSNicholas Bellinger } 1443c66ac9dbSNicholas Bellinger 1444c66ac9dbSNicholas Bellinger static int core_scsi3_nodeacl_depend_item(struct se_node_acl *nacl) 1445c66ac9dbSNicholas Bellinger { 1446c66ac9dbSNicholas Bellinger if (nacl->dynamic_node_acl) 1447c66ac9dbSNicholas Bellinger return 0; 1448d588cf8fSChristoph Hellwig return target_depend_item(&nacl->acl_group.cg_item); 1449c66ac9dbSNicholas Bellinger } 1450c66ac9dbSNicholas Bellinger 1451c66ac9dbSNicholas Bellinger static void core_scsi3_nodeacl_undepend_item(struct se_node_acl *nacl) 1452c66ac9dbSNicholas Bellinger { 1453d588cf8fSChristoph Hellwig if (!nacl->dynamic_node_acl) 1454d588cf8fSChristoph Hellwig target_undepend_item(&nacl->acl_group.cg_item); 145533940d09SJoern Engel atomic_dec_mb(&nacl->acl_pr_ref_count); 1456c66ac9dbSNicholas Bellinger } 1457c66ac9dbSNicholas Bellinger 1458c66ac9dbSNicholas Bellinger static int core_scsi3_lunacl_depend_item(struct se_dev_entry *se_deve) 1459c66ac9dbSNicholas Bellinger { 146079dc9c9eSNicholas Bellinger struct se_lun_acl *lun_acl; 1461ac75d8beSBart Van Assche 1462c66ac9dbSNicholas Bellinger /* 1463c66ac9dbSNicholas Bellinger * For nacl->dynamic_node_acl=1 1464c66ac9dbSNicholas Bellinger */ 146579dc9c9eSNicholas Bellinger lun_acl = rcu_dereference_check(se_deve->se_lun_acl, 14662c935bc5SPeter Zijlstra kref_read(&se_deve->pr_kref) != 0); 14676708bb27SAndy Grover if (!lun_acl) 1468c66ac9dbSNicholas Bellinger return 0; 1469c66ac9dbSNicholas Bellinger 1470d588cf8fSChristoph Hellwig return target_depend_item(&lun_acl->se_lun_group.cg_item); 1471c66ac9dbSNicholas Bellinger } 1472c66ac9dbSNicholas Bellinger 1473c66ac9dbSNicholas Bellinger static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *se_deve) 1474c66ac9dbSNicholas Bellinger { 147529a05deeSNicholas Bellinger struct se_lun_acl *lun_acl; 1476ac75d8beSBart Van Assche 1477c66ac9dbSNicholas Bellinger /* 1478c66ac9dbSNicholas Bellinger * For nacl->dynamic_node_acl=1 1479c66ac9dbSNicholas Bellinger */ 148079dc9c9eSNicholas Bellinger lun_acl = rcu_dereference_check(se_deve->se_lun_acl, 14812c935bc5SPeter Zijlstra kref_read(&se_deve->pr_kref) != 0); 14826708bb27SAndy Grover if (!lun_acl) { 148329a05deeSNicholas Bellinger kref_put(&se_deve->pr_kref, target_pr_kref_release); 1484c66ac9dbSNicholas Bellinger return; 1485c66ac9dbSNicholas Bellinger } 1486c66ac9dbSNicholas Bellinger 1487d588cf8fSChristoph Hellwig target_undepend_item(&lun_acl->se_lun_group.cg_item); 148829a05deeSNicholas Bellinger kref_put(&se_deve->pr_kref, target_pr_kref_release); 1489c66ac9dbSNicholas Bellinger } 1490c66ac9dbSNicholas Bellinger 1491de103c93SChristoph Hellwig static sense_reason_t 1492de103c93SChristoph Hellwig core_scsi3_decode_spec_i_port( 1493c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 1494c66ac9dbSNicholas Bellinger struct se_portal_group *tpg, 1495c66ac9dbSNicholas Bellinger unsigned char *l_isid, 1496c66ac9dbSNicholas Bellinger u64 sa_res_key, 1497c66ac9dbSNicholas Bellinger int all_tg_pt, 1498c66ac9dbSNicholas Bellinger int aptpl) 1499c66ac9dbSNicholas Bellinger { 15005951146dSAndy Grover struct se_device *dev = cmd->se_dev; 1501c66ac9dbSNicholas Bellinger struct se_portal_group *dest_tpg = NULL, *tmp_tpg; 1502e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 1503c66ac9dbSNicholas Bellinger struct se_node_acl *dest_node_acl = NULL; 150479dc9c9eSNicholas Bellinger struct se_dev_entry *dest_se_deve = NULL; 1505c66ac9dbSNicholas Bellinger struct t10_pr_registration *dest_pr_reg, *local_pr_reg, *pr_reg_e; 1506c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe; 1507d0f474e5SRoland Dreier LIST_HEAD(tid_dest_list); 1508c66ac9dbSNicholas Bellinger struct pr_transport_id_holder *tidh_new, *tidh, *tidh_tmp; 15092650d71eSChristoph Hellwig unsigned char *buf, *ptr, proto_ident; 15109b353cc8SSagi Grimberg const unsigned char *i_str = NULL; 151113ba564cSJulia Lawall char *iport_ptr = NULL, i_buf[PR_REG_ISID_ID_LEN]; 1512de103c93SChristoph Hellwig sense_reason_t ret; 1513c66ac9dbSNicholas Bellinger u32 tpdl, tid_len = 0; 1514c66ac9dbSNicholas Bellinger u32 dest_rtpi = 0; 1515c66ac9dbSNicholas Bellinger 1516c66ac9dbSNicholas Bellinger /* 1517c66ac9dbSNicholas Bellinger * Allocate a struct pr_transport_id_holder and setup the 151879dc9c9eSNicholas Bellinger * local_node_acl pointer and add to struct list_head tid_dest_list 151979dc9c9eSNicholas Bellinger * for add registration processing in the loop of tid_dest_list below. 1520c66ac9dbSNicholas Bellinger */ 1521c66ac9dbSNicholas Bellinger tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), GFP_KERNEL); 15226708bb27SAndy Grover if (!tidh_new) { 15236708bb27SAndy Grover pr_err("Unable to allocate tidh_new\n"); 1524de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1525c66ac9dbSNicholas Bellinger } 1526c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&tidh_new->dest_list); 1527c66ac9dbSNicholas Bellinger tidh_new->dest_tpg = tpg; 1528c66ac9dbSNicholas Bellinger tidh_new->dest_node_acl = se_sess->se_node_acl; 1529c66ac9dbSNicholas Bellinger 15305951146dSAndy Grover local_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev, 153179dc9c9eSNicholas Bellinger se_sess->se_node_acl, cmd->se_lun, 153279dc9c9eSNicholas Bellinger NULL, cmd->orig_fe_lun, l_isid, 1533c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl); 15346708bb27SAndy Grover if (!local_pr_reg) { 1535c66ac9dbSNicholas Bellinger kfree(tidh_new); 1536de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1537c66ac9dbSNicholas Bellinger } 1538c66ac9dbSNicholas Bellinger tidh_new->dest_pr_reg = local_pr_reg; 1539c66ac9dbSNicholas Bellinger /* 1540c66ac9dbSNicholas Bellinger * The local I_T nexus does not hold any configfs dependances, 154179dc9c9eSNicholas Bellinger * so we set tidh_new->dest_se_deve to NULL to prevent the 1542c66ac9dbSNicholas Bellinger * configfs_undepend_item() calls in the tid_dest_list loops below. 1543c66ac9dbSNicholas Bellinger */ 154479dc9c9eSNicholas Bellinger tidh_new->dest_se_deve = NULL; 1545c66ac9dbSNicholas Bellinger list_add_tail(&tidh_new->dest_list, &tid_dest_list); 154605d1c7c0SAndy Grover 15470d7f1299SPaolo Bonzini if (cmd->data_length < 28) { 15480d7f1299SPaolo Bonzini pr_warn("SPC-PR: Received PR OUT parameter list" 15490d7f1299SPaolo Bonzini " length too small: %u\n", cmd->data_length); 1550de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 15510d7f1299SPaolo Bonzini goto out; 15520d7f1299SPaolo Bonzini } 15530d7f1299SPaolo Bonzini 15544949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 1555de103c93SChristoph Hellwig if (!buf) { 1556de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1557de103c93SChristoph Hellwig goto out; 1558de103c93SChristoph Hellwig } 1559de103c93SChristoph Hellwig 1560c66ac9dbSNicholas Bellinger /* 1561c66ac9dbSNicholas Bellinger * For a PERSISTENT RESERVE OUT specify initiator ports payload, 1562c66ac9dbSNicholas Bellinger * first extract TransportID Parameter Data Length, and make sure 1563c66ac9dbSNicholas Bellinger * the value matches up to the SCSI expected data transfer length. 1564c66ac9dbSNicholas Bellinger */ 1565a85d667eSBart Van Assche tpdl = get_unaligned_be32(&buf[24]); 1566c66ac9dbSNicholas Bellinger 1567c66ac9dbSNicholas Bellinger if ((tpdl + 28) != cmd->data_length) { 15686708bb27SAndy Grover pr_err("SPC-3 PR: Illegal tpdl: %u + 28 byte header" 1569c66ac9dbSNicholas Bellinger " does not equal CDB data_length: %u\n", tpdl, 1570c66ac9dbSNicholas Bellinger cmd->data_length); 1571de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 1572de103c93SChristoph Hellwig goto out_unmap; 1573c66ac9dbSNicholas Bellinger } 1574c66ac9dbSNicholas Bellinger /* 1575c66ac9dbSNicholas Bellinger * Start processing the received transport IDs using the 1576c66ac9dbSNicholas Bellinger * receiving I_T Nexus portal's fabric dependent methods to 1577c66ac9dbSNicholas Bellinger * obtain the SCSI Initiator Port/Device Identifiers. 1578c66ac9dbSNicholas Bellinger */ 1579c66ac9dbSNicholas Bellinger ptr = &buf[28]; 1580c66ac9dbSNicholas Bellinger 1581c66ac9dbSNicholas Bellinger while (tpdl > 0) { 1582adf653f9SChristoph Hellwig struct se_lun *dest_lun, *tmp_lun; 158379dc9c9eSNicholas Bellinger 1584c66ac9dbSNicholas Bellinger proto_ident = (ptr[0] & 0x0f); 1585c66ac9dbSNicholas Bellinger dest_tpg = NULL; 1586c66ac9dbSNicholas Bellinger 1587c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 1588adf653f9SChristoph Hellwig list_for_each_entry(tmp_lun, &dev->dev_sep_list, lun_dev_link) { 1589adf653f9SChristoph Hellwig tmp_tpg = tmp_lun->lun_tpg; 15902650d71eSChristoph Hellwig 1591c66ac9dbSNicholas Bellinger /* 1592c66ac9dbSNicholas Bellinger * Look for the matching proto_ident provided by 1593c66ac9dbSNicholas Bellinger * the received TransportID 1594c66ac9dbSNicholas Bellinger */ 15952aeeafaeSChristoph Hellwig if (tmp_tpg->proto_id != proto_ident) 1596c66ac9dbSNicholas Bellinger continue; 1597adf653f9SChristoph Hellwig dest_rtpi = tmp_lun->lun_rtpi; 1598c66ac9dbSNicholas Bellinger 15992650d71eSChristoph Hellwig i_str = target_parse_pr_out_transport_id(tmp_tpg, 16002650d71eSChristoph Hellwig (const char *)ptr, &tid_len, &iport_ptr); 16016708bb27SAndy Grover if (!i_str) 1602c66ac9dbSNicholas Bellinger continue; 1603c66ac9dbSNicholas Bellinger 160433940d09SJoern Engel atomic_inc_mb(&tmp_tpg->tpg_pr_ref_count); 1605c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 1606c66ac9dbSNicholas Bellinger 1607de103c93SChristoph Hellwig if (core_scsi3_tpg_depend_item(tmp_tpg)) { 16086708bb27SAndy Grover pr_err(" core_scsi3_tpg_depend_item()" 1609c66ac9dbSNicholas Bellinger " for tmp_tpg\n"); 161033940d09SJoern Engel atomic_dec_mb(&tmp_tpg->tpg_pr_ref_count); 1611de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1612de103c93SChristoph Hellwig goto out_unmap; 1613c66ac9dbSNicholas Bellinger } 1614c66ac9dbSNicholas Bellinger /* 161535d1efe8SMasanari Iida * Locate the destination initiator ACL to be registered 1616c66ac9dbSNicholas Bellinger * from the decoded fabric module specific TransportID 1617c66ac9dbSNicholas Bellinger * at *i_str. 1618c66ac9dbSNicholas Bellinger */ 1619403edd78SNicholas Bellinger mutex_lock(&tmp_tpg->acl_node_mutex); 1620c66ac9dbSNicholas Bellinger dest_node_acl = __core_tpg_get_initiator_node_acl( 1621c66ac9dbSNicholas Bellinger tmp_tpg, i_str); 162233940d09SJoern Engel if (dest_node_acl) 162333940d09SJoern Engel atomic_inc_mb(&dest_node_acl->acl_pr_ref_count); 1624403edd78SNicholas Bellinger mutex_unlock(&tmp_tpg->acl_node_mutex); 1625c66ac9dbSNicholas Bellinger 16266708bb27SAndy Grover if (!dest_node_acl) { 1627c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(tmp_tpg); 1628c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 1629c66ac9dbSNicholas Bellinger continue; 1630c66ac9dbSNicholas Bellinger } 1631c66ac9dbSNicholas Bellinger 1632de103c93SChristoph Hellwig if (core_scsi3_nodeacl_depend_item(dest_node_acl)) { 16336708bb27SAndy Grover pr_err("configfs_depend_item() failed" 1634c66ac9dbSNicholas Bellinger " for dest_node_acl->acl_group\n"); 163533940d09SJoern Engel atomic_dec_mb(&dest_node_acl->acl_pr_ref_count); 1636c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(tmp_tpg); 1637de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1638de103c93SChristoph Hellwig goto out_unmap; 1639c66ac9dbSNicholas Bellinger } 1640c66ac9dbSNicholas Bellinger 1641c66ac9dbSNicholas Bellinger dest_tpg = tmp_tpg; 16426708bb27SAndy Grover pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node:" 1643c66ac9dbSNicholas Bellinger " %s Port RTPI: %hu\n", 1644e3d6f909SAndy Grover dest_tpg->se_tpg_tfo->get_fabric_name(), 1645c66ac9dbSNicholas Bellinger dest_node_acl->initiatorname, dest_rtpi); 1646c66ac9dbSNicholas Bellinger 1647c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 1648c66ac9dbSNicholas Bellinger break; 1649c66ac9dbSNicholas Bellinger } 1650c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 1651c66ac9dbSNicholas Bellinger 16526708bb27SAndy Grover if (!dest_tpg) { 16536708bb27SAndy Grover pr_err("SPC-3 PR SPEC_I_PT: Unable to locate" 1654c66ac9dbSNicholas Bellinger " dest_tpg\n"); 1655de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 1656de103c93SChristoph Hellwig goto out_unmap; 1657c66ac9dbSNicholas Bellinger } 16588b1e1244SAndy Grover 16596708bb27SAndy Grover pr_debug("SPC-3 PR SPEC_I_PT: Got %s data_length: %u tpdl: %u" 1660c66ac9dbSNicholas Bellinger " tid_len: %d for %s + %s\n", 1661e3d6f909SAndy Grover dest_tpg->se_tpg_tfo->get_fabric_name(), cmd->data_length, 1662c66ac9dbSNicholas Bellinger tpdl, tid_len, i_str, iport_ptr); 16638b1e1244SAndy Grover 1664c66ac9dbSNicholas Bellinger if (tid_len > tpdl) { 16656708bb27SAndy Grover pr_err("SPC-3 PR SPEC_I_PT: Illegal tid_len:" 1666c66ac9dbSNicholas Bellinger " %u for Transport ID: %s\n", tid_len, ptr); 1667c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1668c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1669de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 1670de103c93SChristoph Hellwig goto out_unmap; 1671c66ac9dbSNicholas Bellinger } 1672c66ac9dbSNicholas Bellinger /* 1673c66ac9dbSNicholas Bellinger * Locate the desintation struct se_dev_entry pointer for matching 1674c66ac9dbSNicholas Bellinger * RELATIVE TARGET PORT IDENTIFIER on the receiving I_T Nexus 1675c66ac9dbSNicholas Bellinger * Target Port. 1676c66ac9dbSNicholas Bellinger */ 1677c66ac9dbSNicholas Bellinger dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, 1678c66ac9dbSNicholas Bellinger dest_rtpi); 16796708bb27SAndy Grover if (!dest_se_deve) { 16806708bb27SAndy Grover pr_err("Unable to locate %s dest_se_deve" 1681c66ac9dbSNicholas Bellinger " from destination RTPI: %hu\n", 1682e3d6f909SAndy Grover dest_tpg->se_tpg_tfo->get_fabric_name(), 1683c66ac9dbSNicholas Bellinger dest_rtpi); 1684c66ac9dbSNicholas Bellinger 1685c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1686c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1687de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 1688de103c93SChristoph Hellwig goto out_unmap; 1689c66ac9dbSNicholas Bellinger } 1690c66ac9dbSNicholas Bellinger 1691de103c93SChristoph Hellwig if (core_scsi3_lunacl_depend_item(dest_se_deve)) { 16926708bb27SAndy Grover pr_err("core_scsi3_lunacl_depend_item()" 1693c66ac9dbSNicholas Bellinger " failed\n"); 169429a05deeSNicholas Bellinger kref_put(&dest_se_deve->pr_kref, target_pr_kref_release); 1695c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1696c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1697de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1698de103c93SChristoph Hellwig goto out_unmap; 1699c66ac9dbSNicholas Bellinger } 17008b1e1244SAndy Grover 17016708bb27SAndy Grover pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node: %s" 1702f2d30680SHannes Reinecke " dest_se_deve mapped_lun: %llu\n", 1703e3d6f909SAndy Grover dest_tpg->se_tpg_tfo->get_fabric_name(), 1704c66ac9dbSNicholas Bellinger dest_node_acl->initiatorname, dest_se_deve->mapped_lun); 17058b1e1244SAndy Grover 1706c66ac9dbSNicholas Bellinger /* 1707c66ac9dbSNicholas Bellinger * Skip any TransportIDs that already have a registration for 1708c66ac9dbSNicholas Bellinger * this target port. 1709c66ac9dbSNicholas Bellinger */ 1710c66ac9dbSNicholas Bellinger pr_reg_e = __core_scsi3_locate_pr_reg(dev, dest_node_acl, 1711c66ac9dbSNicholas Bellinger iport_ptr); 1712c66ac9dbSNicholas Bellinger if (pr_reg_e) { 1713c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_e); 1714c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1715c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1716c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1717c66ac9dbSNicholas Bellinger ptr += tid_len; 1718c66ac9dbSNicholas Bellinger tpdl -= tid_len; 1719c66ac9dbSNicholas Bellinger tid_len = 0; 1720c66ac9dbSNicholas Bellinger continue; 1721c66ac9dbSNicholas Bellinger } 1722c66ac9dbSNicholas Bellinger /* 1723c66ac9dbSNicholas Bellinger * Allocate a struct pr_transport_id_holder and setup 1724c66ac9dbSNicholas Bellinger * the dest_node_acl and dest_se_deve pointers for the 1725c66ac9dbSNicholas Bellinger * loop below. 1726c66ac9dbSNicholas Bellinger */ 1727c66ac9dbSNicholas Bellinger tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), 1728c66ac9dbSNicholas Bellinger GFP_KERNEL); 17296708bb27SAndy Grover if (!tidh_new) { 17306708bb27SAndy Grover pr_err("Unable to allocate tidh_new\n"); 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); 1734de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 1735de103c93SChristoph Hellwig goto out_unmap; 1736c66ac9dbSNicholas Bellinger } 1737c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&tidh_new->dest_list); 1738c66ac9dbSNicholas Bellinger tidh_new->dest_tpg = dest_tpg; 1739c66ac9dbSNicholas Bellinger tidh_new->dest_node_acl = dest_node_acl; 1740c66ac9dbSNicholas Bellinger tidh_new->dest_se_deve = dest_se_deve; 1741c66ac9dbSNicholas Bellinger 1742c66ac9dbSNicholas Bellinger /* 1743c66ac9dbSNicholas Bellinger * Allocate, but do NOT add the registration for the 1744c66ac9dbSNicholas Bellinger * TransportID referenced SCSI Initiator port. This 1745c66ac9dbSNicholas Bellinger * done because of the following from spc4r17 in section 1746c66ac9dbSNicholas Bellinger * 6.14.3 wrt SPEC_I_PT: 1747c66ac9dbSNicholas Bellinger * 1748c66ac9dbSNicholas Bellinger * "If a registration fails for any initiator port (e.g., if th 1749c66ac9dbSNicholas Bellinger * logical unit does not have enough resources available to 1750c66ac9dbSNicholas Bellinger * hold the registration information), no registrations shall be 1751c66ac9dbSNicholas Bellinger * made, and the command shall be terminated with 1752c66ac9dbSNicholas Bellinger * CHECK CONDITION status." 1753c66ac9dbSNicholas Bellinger * 1754c66ac9dbSNicholas Bellinger * That means we call __core_scsi3_alloc_registration() here, 1755c66ac9dbSNicholas Bellinger * and then call __core_scsi3_add_registration() in the 1756c66ac9dbSNicholas Bellinger * 2nd loop which will never fail. 1757c66ac9dbSNicholas Bellinger */ 175879dc9c9eSNicholas Bellinger dest_lun = rcu_dereference_check(dest_se_deve->se_lun, 17592c935bc5SPeter Zijlstra kref_read(&dest_se_deve->pr_kref) != 0); 176079dc9c9eSNicholas Bellinger 17615951146dSAndy Grover dest_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev, 176279dc9c9eSNicholas Bellinger dest_node_acl, dest_lun, dest_se_deve, 176379dc9c9eSNicholas Bellinger dest_se_deve->mapped_lun, iport_ptr, 1764c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl); 17656708bb27SAndy Grover if (!dest_pr_reg) { 1766c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1767c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1768c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1769c66ac9dbSNicholas Bellinger kfree(tidh_new); 1770de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 1771de103c93SChristoph Hellwig goto out_unmap; 1772c66ac9dbSNicholas Bellinger } 1773c66ac9dbSNicholas Bellinger tidh_new->dest_pr_reg = dest_pr_reg; 1774c66ac9dbSNicholas Bellinger list_add_tail(&tidh_new->dest_list, &tid_dest_list); 1775c66ac9dbSNicholas Bellinger 1776c66ac9dbSNicholas Bellinger ptr += tid_len; 1777c66ac9dbSNicholas Bellinger tpdl -= tid_len; 1778c66ac9dbSNicholas Bellinger tid_len = 0; 1779c66ac9dbSNicholas Bellinger 1780c66ac9dbSNicholas Bellinger } 178105d1c7c0SAndy Grover 17824949314cSAndy Grover transport_kunmap_data_sg(cmd); 178305d1c7c0SAndy Grover 1784c66ac9dbSNicholas Bellinger /* 1785c66ac9dbSNicholas Bellinger * Go ahead and create a registrations from tid_dest_list for the 1786c66ac9dbSNicholas Bellinger * SPEC_I_PT provided TransportID for the *tidh referenced dest_node_acl 1787c66ac9dbSNicholas Bellinger * and dest_se_deve. 1788c66ac9dbSNicholas Bellinger * 1789c66ac9dbSNicholas Bellinger * The SA Reservation Key from the PROUT is set for the 1790c66ac9dbSNicholas Bellinger * registration, and ALL_TG_PT is also passed. ALL_TG_PT=1 1791c66ac9dbSNicholas Bellinger * means that the TransportID Initiator port will be 1792c66ac9dbSNicholas Bellinger * registered on all of the target ports in the SCSI target device 1793c66ac9dbSNicholas Bellinger * ALL_TG_PT=0 means the registration will only be for the 1794c66ac9dbSNicholas Bellinger * SCSI target port the PROUT REGISTER with SPEC_I_PT=1 1795c66ac9dbSNicholas Bellinger * was received. 1796c66ac9dbSNicholas Bellinger */ 1797c66ac9dbSNicholas Bellinger list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) { 1798c66ac9dbSNicholas Bellinger dest_tpg = tidh->dest_tpg; 1799c66ac9dbSNicholas Bellinger dest_node_acl = tidh->dest_node_acl; 1800c66ac9dbSNicholas Bellinger dest_se_deve = tidh->dest_se_deve; 1801c66ac9dbSNicholas Bellinger dest_pr_reg = tidh->dest_pr_reg; 1802c66ac9dbSNicholas Bellinger 1803c66ac9dbSNicholas Bellinger list_del(&tidh->dest_list); 1804c66ac9dbSNicholas Bellinger kfree(tidh); 1805c66ac9dbSNicholas Bellinger 1806c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1807d2843c17SAndy Grover core_pr_dump_initiator_port(dest_pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1808c66ac9dbSNicholas Bellinger 18095951146dSAndy Grover __core_scsi3_add_registration(cmd->se_dev, dest_node_acl, 1810c66ac9dbSNicholas Bellinger dest_pr_reg, 0, 0); 1811c66ac9dbSNicholas Bellinger 18126708bb27SAndy Grover pr_debug("SPC-3 PR [%s] SPEC_I_PT: Successfully" 1813c66ac9dbSNicholas Bellinger " registered Transport ID for Node: %s%s Mapped LUN:" 1814f2d30680SHannes Reinecke " %llu\n", dest_tpg->se_tpg_tfo->get_fabric_name(), 181579dc9c9eSNicholas Bellinger dest_node_acl->initiatorname, i_buf, (dest_se_deve) ? 181679dc9c9eSNicholas Bellinger dest_se_deve->mapped_lun : 0); 1817c66ac9dbSNicholas Bellinger 18183ccd6e83SNicholas Bellinger if (!dest_se_deve) { 18193ccd6e83SNicholas Bellinger kref_put(&local_pr_reg->pr_reg_deve->pr_kref, 18203ccd6e83SNicholas Bellinger target_pr_kref_release); 1821c66ac9dbSNicholas Bellinger continue; 18223ccd6e83SNicholas Bellinger } 1823c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1824c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1825c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1826c66ac9dbSNicholas Bellinger } 1827c66ac9dbSNicholas Bellinger 1828c66ac9dbSNicholas Bellinger return 0; 1829de103c93SChristoph Hellwig out_unmap: 18304949314cSAndy Grover transport_kunmap_data_sg(cmd); 1831de103c93SChristoph Hellwig out: 1832c66ac9dbSNicholas Bellinger /* 1833c66ac9dbSNicholas Bellinger * For the failure case, release everything from tid_dest_list 1834c66ac9dbSNicholas Bellinger * including *dest_pr_reg and the configfs dependances.. 1835c66ac9dbSNicholas Bellinger */ 1836c66ac9dbSNicholas Bellinger list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) { 1837c66ac9dbSNicholas Bellinger dest_tpg = tidh->dest_tpg; 1838c66ac9dbSNicholas Bellinger dest_node_acl = tidh->dest_node_acl; 1839c66ac9dbSNicholas Bellinger dest_se_deve = tidh->dest_se_deve; 1840c66ac9dbSNicholas Bellinger dest_pr_reg = tidh->dest_pr_reg; 1841c66ac9dbSNicholas Bellinger 1842c66ac9dbSNicholas Bellinger list_del(&tidh->dest_list); 1843c66ac9dbSNicholas Bellinger kfree(tidh); 1844c66ac9dbSNicholas Bellinger /* 1845c66ac9dbSNicholas Bellinger * Release any extra ALL_TG_PT=1 registrations for 1846c66ac9dbSNicholas Bellinger * the SPEC_I_PT=1 case. 1847c66ac9dbSNicholas Bellinger */ 1848c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, 1849c66ac9dbSNicholas Bellinger &dest_pr_reg->pr_reg_atp_list, 1850c66ac9dbSNicholas Bellinger pr_reg_atp_mem_list) { 1851c66ac9dbSNicholas Bellinger list_del(&pr_reg_tmp->pr_reg_atp_mem_list); 1852c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); 1853c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp); 1854c66ac9dbSNicholas Bellinger } 1855c66ac9dbSNicholas Bellinger 1856c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, dest_pr_reg); 1857c66ac9dbSNicholas Bellinger 18583ccd6e83SNicholas Bellinger if (!dest_se_deve) { 18593ccd6e83SNicholas Bellinger kref_put(&local_pr_reg->pr_reg_deve->pr_kref, 18603ccd6e83SNicholas Bellinger target_pr_kref_release); 1861c66ac9dbSNicholas Bellinger continue; 18623ccd6e83SNicholas Bellinger } 1863c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1864c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1865c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1866c66ac9dbSNicholas Bellinger } 1867c66ac9dbSNicholas Bellinger return ret; 1868c66ac9dbSNicholas Bellinger } 1869c66ac9dbSNicholas Bellinger 18703c8a6228SAndy Grover static int core_scsi3_update_aptpl_buf( 1871c66ac9dbSNicholas Bellinger struct se_device *dev, 1872c66ac9dbSNicholas Bellinger unsigned char *buf, 18730607decdSAndy Grover u32 pr_aptpl_buf_len) 1874c66ac9dbSNicholas Bellinger { 1875c66ac9dbSNicholas Bellinger struct se_portal_group *tpg; 1876c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 1877c66ac9dbSNicholas Bellinger unsigned char tmp[512], isid_buf[32]; 1878c66ac9dbSNicholas Bellinger ssize_t len = 0; 1879c66ac9dbSNicholas Bellinger int reg_count = 0; 18803c8a6228SAndy Grover int ret = 0; 1881c66ac9dbSNicholas Bellinger 18823c8a6228SAndy Grover spin_lock(&dev->dev_reservation_lock); 18833c8a6228SAndy Grover spin_lock(&dev->t10_pr.registration_lock); 1884c66ac9dbSNicholas Bellinger /* 1885c66ac9dbSNicholas Bellinger * Walk the registration list.. 1886c66ac9dbSNicholas Bellinger */ 18870fd97ccfSChristoph Hellwig list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 1888c66ac9dbSNicholas Bellinger pr_reg_list) { 1889c66ac9dbSNicholas Bellinger 1890c66ac9dbSNicholas Bellinger tmp[0] = '\0'; 1891c66ac9dbSNicholas Bellinger isid_buf[0] = '\0'; 1892c66ac9dbSNicholas Bellinger tpg = pr_reg->pr_reg_nacl->se_tpg; 1893c66ac9dbSNicholas Bellinger /* 1894c66ac9dbSNicholas Bellinger * Write out any ISID value to APTPL metadata that was included 1895c66ac9dbSNicholas Bellinger * in the original registration. 1896c66ac9dbSNicholas Bellinger */ 1897c66ac9dbSNicholas Bellinger if (pr_reg->isid_present_at_reg) 1898c66ac9dbSNicholas Bellinger snprintf(isid_buf, 32, "initiator_sid=%s\n", 1899c66ac9dbSNicholas Bellinger pr_reg->pr_reg_isid); 1900c66ac9dbSNicholas Bellinger /* 1901c66ac9dbSNicholas Bellinger * Include special metadata if the pr_reg matches the 1902c66ac9dbSNicholas Bellinger * reservation holder. 1903c66ac9dbSNicholas Bellinger */ 1904c66ac9dbSNicholas Bellinger if (dev->dev_pr_res_holder == pr_reg) { 1905c66ac9dbSNicholas Bellinger snprintf(tmp, 512, "PR_REG_START: %d" 1906c66ac9dbSNicholas Bellinger "\ninitiator_fabric=%s\n" 1907c66ac9dbSNicholas Bellinger "initiator_node=%s\n%s" 1908c66ac9dbSNicholas Bellinger "sa_res_key=%llu\n" 1909c66ac9dbSNicholas Bellinger "res_holder=1\nres_type=%02x\n" 1910c66ac9dbSNicholas Bellinger "res_scope=%02x\nres_all_tg_pt=%d\n" 1911f2d30680SHannes Reinecke "mapped_lun=%llu\n", reg_count, 1912e3d6f909SAndy Grover tpg->se_tpg_tfo->get_fabric_name(), 1913c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->initiatorname, isid_buf, 1914c66ac9dbSNicholas Bellinger pr_reg->pr_res_key, pr_reg->pr_res_type, 1915c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope, pr_reg->pr_reg_all_tg_pt, 1916c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun); 1917c66ac9dbSNicholas Bellinger } else { 1918c66ac9dbSNicholas Bellinger snprintf(tmp, 512, "PR_REG_START: %d\n" 1919c66ac9dbSNicholas Bellinger "initiator_fabric=%s\ninitiator_node=%s\n%s" 1920c66ac9dbSNicholas Bellinger "sa_res_key=%llu\nres_holder=0\n" 1921f2d30680SHannes Reinecke "res_all_tg_pt=%d\nmapped_lun=%llu\n", 1922e3d6f909SAndy Grover reg_count, tpg->se_tpg_tfo->get_fabric_name(), 1923c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->initiatorname, isid_buf, 1924c66ac9dbSNicholas Bellinger pr_reg->pr_res_key, pr_reg->pr_reg_all_tg_pt, 1925c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun); 1926c66ac9dbSNicholas Bellinger } 1927c66ac9dbSNicholas Bellinger 192860d645a4SDan Carpenter if ((len + strlen(tmp) >= pr_aptpl_buf_len)) { 1929f161d4b4SNicholas Bellinger pr_err("Unable to update renaming APTPL metadata," 1930f161d4b4SNicholas Bellinger " reallocating larger buffer\n"); 19313c8a6228SAndy Grover ret = -EMSGSIZE; 19323c8a6228SAndy Grover goto out; 1933c66ac9dbSNicholas Bellinger } 1934c66ac9dbSNicholas Bellinger len += sprintf(buf+len, "%s", tmp); 1935c66ac9dbSNicholas Bellinger 1936c66ac9dbSNicholas Bellinger /* 1937c66ac9dbSNicholas Bellinger * Include information about the associated SCSI target port. 1938c66ac9dbSNicholas Bellinger */ 1939c66ac9dbSNicholas Bellinger snprintf(tmp, 512, "target_fabric=%s\ntarget_node=%s\n" 1940f2d30680SHannes Reinecke "tpgt=%hu\nport_rtpi=%hu\ntarget_lun=%llu\nPR_REG_END:" 1941e3d6f909SAndy Grover " %d\n", tpg->se_tpg_tfo->get_fabric_name(), 1942e3d6f909SAndy Grover tpg->se_tpg_tfo->tpg_get_wwn(tpg), 1943e3d6f909SAndy Grover tpg->se_tpg_tfo->tpg_get_tag(tpg), 194479dc9c9eSNicholas Bellinger pr_reg->tg_pt_sep_rtpi, pr_reg->pr_aptpl_target_lun, 194579dc9c9eSNicholas Bellinger reg_count); 1946c66ac9dbSNicholas Bellinger 194760d645a4SDan Carpenter if ((len + strlen(tmp) >= pr_aptpl_buf_len)) { 1948f161d4b4SNicholas Bellinger pr_err("Unable to update renaming APTPL metadata," 1949f161d4b4SNicholas Bellinger " reallocating larger buffer\n"); 19503c8a6228SAndy Grover ret = -EMSGSIZE; 19513c8a6228SAndy Grover goto out; 1952c66ac9dbSNicholas Bellinger } 1953c66ac9dbSNicholas Bellinger len += sprintf(buf+len, "%s", tmp); 1954c66ac9dbSNicholas Bellinger reg_count++; 1955c66ac9dbSNicholas Bellinger } 1956c66ac9dbSNicholas Bellinger 19576708bb27SAndy Grover if (!reg_count) 1958c66ac9dbSNicholas Bellinger len += sprintf(buf+len, "No Registrations or Reservations"); 1959c66ac9dbSNicholas Bellinger 19603c8a6228SAndy Grover out: 19613c8a6228SAndy Grover spin_unlock(&dev->t10_pr.registration_lock); 1962c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1963c66ac9dbSNicholas Bellinger 1964c66ac9dbSNicholas Bellinger return ret; 1965c66ac9dbSNicholas Bellinger } 1966c66ac9dbSNicholas Bellinger 1967c66ac9dbSNicholas Bellinger static int __core_scsi3_write_aptpl_to_file( 1968c66ac9dbSNicholas Bellinger struct se_device *dev, 19694dee96fbSAndy Grover unsigned char *buf) 1970c66ac9dbSNicholas Bellinger { 19710fd97ccfSChristoph Hellwig struct t10_wwn *wwn = &dev->t10_wwn; 1972c66ac9dbSNicholas Bellinger struct file *file; 1973c66ac9dbSNicholas Bellinger int flags = O_RDWR | O_CREAT | O_TRUNC; 1974c66ac9dbSNicholas Bellinger char path[512]; 19754dee96fbSAndy Grover u32 pr_aptpl_buf_len; 1976c66ac9dbSNicholas Bellinger int ret; 1977c66ac9dbSNicholas Bellinger 1978c66ac9dbSNicholas Bellinger memset(path, 0, 512); 1979c66ac9dbSNicholas Bellinger 198060d645a4SDan Carpenter if (strlen(&wwn->unit_serial[0]) >= 512) { 19816708bb27SAndy Grover pr_err("WWN value for struct se_device does not fit" 1982c66ac9dbSNicholas Bellinger " into path buffer\n"); 1983e3d6f909SAndy Grover return -EMSGSIZE; 1984c66ac9dbSNicholas Bellinger } 1985c66ac9dbSNicholas Bellinger 1986fdddf932SLee Duncan snprintf(path, 512, "%s/pr/aptpl_%s", db_root, &wwn->unit_serial[0]); 1987c66ac9dbSNicholas Bellinger file = filp_open(path, flags, 0600); 19880e9b10a9SAl Viro if (IS_ERR(file)) { 19896708bb27SAndy Grover pr_err("filp_open(%s) for APTPL metadata" 1990c66ac9dbSNicholas Bellinger " failed\n", path); 19910e9b10a9SAl Viro return PTR_ERR(file); 1992c66ac9dbSNicholas Bellinger } 1993c66ac9dbSNicholas Bellinger 19944dee96fbSAndy Grover pr_aptpl_buf_len = (strlen(buf) + 1); /* Add extra for NULL */ 1995c66ac9dbSNicholas Bellinger 19960e9b10a9SAl Viro ret = kernel_write(file, buf, pr_aptpl_buf_len, 0); 1997c66ac9dbSNicholas Bellinger 19980e9b10a9SAl Viro if (ret < 0) 19996708bb27SAndy Grover pr_debug("Error writing APTPL metadata file: %s\n", path); 20000e9b10a9SAl Viro fput(file); 2001c66ac9dbSNicholas Bellinger 2002f730f915SGera Kazakov return (ret < 0) ? -EIO : 0; 2003c66ac9dbSNicholas Bellinger } 2004c66ac9dbSNicholas Bellinger 2005c66ac9dbSNicholas Bellinger /* 2006459f213bSAndy Grover * Clear the APTPL metadata if APTPL has been disabled, otherwise 2007459f213bSAndy Grover * write out the updated metadata to struct file for this SCSI device. 2008c66ac9dbSNicholas Bellinger */ 20098a391857SNicholas Bellinger static sense_reason_t core_scsi3_update_and_write_aptpl(struct se_device *dev, bool aptpl) 2010459f213bSAndy Grover { 20118a391857SNicholas Bellinger unsigned char *buf; 2012f161d4b4SNicholas Bellinger int rc, len = PR_APTPL_BUF_LEN; 2013459f213bSAndy Grover 2014459f213bSAndy Grover if (!aptpl) { 2015459f213bSAndy Grover char *null_buf = "No Registrations or Reservations\n"; 2016459f213bSAndy Grover 20178a391857SNicholas Bellinger rc = __core_scsi3_write_aptpl_to_file(dev, null_buf); 2018459f213bSAndy Grover dev->t10_pr.pr_aptpl_active = 0; 2019459f213bSAndy Grover pr_debug("SPC-3 PR: Set APTPL Bit Deactivated\n"); 20208a391857SNicholas Bellinger 20218a391857SNicholas Bellinger if (rc) 20228a391857SNicholas Bellinger return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 20238a391857SNicholas Bellinger 20248a391857SNicholas Bellinger return 0; 20258a391857SNicholas Bellinger } 2026f161d4b4SNicholas Bellinger retry: 2027f161d4b4SNicholas Bellinger buf = vzalloc(len); 2028459f213bSAndy Grover if (!buf) 20298a391857SNicholas Bellinger return TCM_OUT_OF_RESOURCES; 2030459f213bSAndy Grover 2031f161d4b4SNicholas Bellinger rc = core_scsi3_update_aptpl_buf(dev, buf, len); 20328a391857SNicholas Bellinger if (rc < 0) { 2033f161d4b4SNicholas Bellinger vfree(buf); 2034f161d4b4SNicholas Bellinger len *= 2; 2035f161d4b4SNicholas Bellinger goto retry; 20360607decdSAndy Grover } 2037de103c93SChristoph Hellwig 20388a391857SNicholas Bellinger rc = __core_scsi3_write_aptpl_to_file(dev, buf); 20398a391857SNicholas Bellinger if (rc != 0) { 2040459f213bSAndy Grover pr_err("SPC-3 PR: Could not update APTPL\n"); 2041f161d4b4SNicholas Bellinger vfree(buf); 20428a391857SNicholas Bellinger return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2043459f213bSAndy Grover } 20448a391857SNicholas Bellinger dev->t10_pr.pr_aptpl_active = 1; 2045f161d4b4SNicholas Bellinger vfree(buf); 20468a391857SNicholas Bellinger pr_debug("SPC-3 PR: Set APTPL Bit Activated\n"); 20478a391857SNicholas Bellinger return 0; 2048c66ac9dbSNicholas Bellinger } 2049c66ac9dbSNicholas Bellinger 2050de103c93SChristoph Hellwig static sense_reason_t 2051de103c93SChristoph Hellwig core_scsi3_emulate_pro_register(struct se_cmd *cmd, u64 res_key, u64 sa_res_key, 2052bc118fe4SAndy Grover bool aptpl, bool all_tg_pt, bool spec_i_pt, enum register_type register_type) 2053c66ac9dbSNicholas Bellinger { 2054e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 20555951146dSAndy Grover struct se_device *dev = cmd->se_dev; 2056e3d6f909SAndy Grover struct se_lun *se_lun = cmd->se_lun; 2057c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg; 2058bc118fe4SAndy Grover struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_reg_tmp; 20590fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 2060c66ac9dbSNicholas Bellinger unsigned char isid_buf[PR_REG_ISID_LEN], *isid_ptr = NULL; 2061a0d50f62SHannes Reinecke sense_reason_t ret = TCM_NO_SENSE; 2062fc09149dSNicholas Bellinger int pr_holder = 0, type; 2063c66ac9dbSNicholas Bellinger 20646708bb27SAndy Grover if (!se_sess || !se_lun) { 20656708bb27SAndy Grover pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); 2066de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2067c66ac9dbSNicholas Bellinger } 2068c66ac9dbSNicholas Bellinger se_tpg = se_sess->se_tpg; 2069c66ac9dbSNicholas Bellinger 2070e3d6f909SAndy Grover if (se_tpg->se_tpg_tfo->sess_get_initiator_sid) { 2071c66ac9dbSNicholas Bellinger memset(&isid_buf[0], 0, PR_REG_ISID_LEN); 2072e3d6f909SAndy Grover se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, &isid_buf[0], 2073c66ac9dbSNicholas Bellinger PR_REG_ISID_LEN); 2074c66ac9dbSNicholas Bellinger isid_ptr = &isid_buf[0]; 2075c66ac9dbSNicholas Bellinger } 2076c66ac9dbSNicholas Bellinger /* 2077c66ac9dbSNicholas Bellinger * Follow logic from spc4r17 Section 5.7.7, Register Behaviors Table 47 2078c66ac9dbSNicholas Bellinger */ 2079bc118fe4SAndy Grover pr_reg = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess); 2080bc118fe4SAndy Grover if (!pr_reg) { 2081c66ac9dbSNicholas Bellinger if (res_key) { 20826708bb27SAndy Grover pr_warn("SPC-3 PR: Reservation Key non-zero" 2083c66ac9dbSNicholas Bellinger " for SA REGISTER, returning CONFLICT\n"); 2084de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 2085c66ac9dbSNicholas Bellinger } 2086c66ac9dbSNicholas Bellinger /* 2087c66ac9dbSNicholas Bellinger * Do nothing but return GOOD status. 2088c66ac9dbSNicholas Bellinger */ 20896708bb27SAndy Grover if (!sa_res_key) 209003e98c9eSNicholas Bellinger return 0; 2091c66ac9dbSNicholas Bellinger 20926708bb27SAndy Grover if (!spec_i_pt) { 2093c66ac9dbSNicholas Bellinger /* 2094c66ac9dbSNicholas Bellinger * Perform the Service Action REGISTER on the Initiator 2095c66ac9dbSNicholas Bellinger * Port Endpoint that the PRO was received from on the 2096c66ac9dbSNicholas Bellinger * Logical Unit of the SCSI device server. 2097c66ac9dbSNicholas Bellinger */ 2098de103c93SChristoph Hellwig if (core_scsi3_alloc_registration(cmd->se_dev, 209979dc9c9eSNicholas Bellinger se_sess->se_node_acl, cmd->se_lun, 210079dc9c9eSNicholas Bellinger NULL, cmd->orig_fe_lun, isid_ptr, 2101c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl, 210233ce6a87SAndy Grover register_type, 0)) { 21036708bb27SAndy Grover pr_err("Unable to allocate" 2104c66ac9dbSNicholas Bellinger " struct t10_pr_registration\n"); 2105de103c93SChristoph Hellwig return TCM_INVALID_PARAMETER_LIST; 2106c66ac9dbSNicholas Bellinger } 2107c66ac9dbSNicholas Bellinger } else { 2108c66ac9dbSNicholas Bellinger /* 2109c66ac9dbSNicholas Bellinger * Register both the Initiator port that received 2110c66ac9dbSNicholas Bellinger * PROUT SA REGISTER + SPEC_I_PT=1 and extract SCSI 2111c66ac9dbSNicholas Bellinger * TransportID from Parameter list and loop through 2112c66ac9dbSNicholas Bellinger * fabric dependent parameter list while calling 2113c66ac9dbSNicholas Bellinger * logic from of core_scsi3_alloc_registration() for 2114c66ac9dbSNicholas Bellinger * each TransportID provided SCSI Initiator Port/Device 2115c66ac9dbSNicholas Bellinger */ 2116c66ac9dbSNicholas Bellinger ret = core_scsi3_decode_spec_i_port(cmd, se_tpg, 2117c66ac9dbSNicholas Bellinger isid_ptr, sa_res_key, all_tg_pt, aptpl); 2118c66ac9dbSNicholas Bellinger if (ret != 0) 2119c66ac9dbSNicholas Bellinger return ret; 2120c66ac9dbSNicholas Bellinger } 2121459f213bSAndy Grover return core_scsi3_update_and_write_aptpl(dev, aptpl); 2122de103c93SChristoph Hellwig } 2123de103c93SChristoph Hellwig 2124bc118fe4SAndy Grover /* ok, existing registration */ 2125c66ac9dbSNicholas Bellinger 2126bc118fe4SAndy Grover if ((register_type == REGISTER) && (res_key != pr_reg->pr_res_key)) { 21276708bb27SAndy Grover pr_err("SPC-3 PR REGISTER: Received" 2128c66ac9dbSNicholas Bellinger " res_key: 0x%016Lx does not match" 2129c66ac9dbSNicholas Bellinger " existing SA REGISTER res_key:" 2130c66ac9dbSNicholas Bellinger " 0x%016Lx\n", res_key, 2131c66ac9dbSNicholas Bellinger pr_reg->pr_res_key); 2132de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 2133bc118fe4SAndy Grover goto out; 2134c66ac9dbSNicholas Bellinger } 2135de103c93SChristoph Hellwig 2136c66ac9dbSNicholas Bellinger if (spec_i_pt) { 21371f070cc2SAndy Grover pr_err("SPC-3 PR REGISTER: SPEC_I_PT" 21381f070cc2SAndy Grover " set on a registered nexus\n"); 2139de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 2140bc118fe4SAndy Grover goto out; 2141c66ac9dbSNicholas Bellinger } 2142de103c93SChristoph Hellwig 2143c66ac9dbSNicholas Bellinger /* 2144c66ac9dbSNicholas Bellinger * An existing ALL_TG_PT=1 registration being released 2145c66ac9dbSNicholas Bellinger * must also set ALL_TG_PT=1 in the incoming PROUT. 2146c66ac9dbSNicholas Bellinger */ 21471f070cc2SAndy Grover if (pr_reg->pr_reg_all_tg_pt && !all_tg_pt) { 21481f070cc2SAndy Grover pr_err("SPC-3 PR REGISTER: ALL_TG_PT=1" 2149c66ac9dbSNicholas Bellinger " registration exists, but ALL_TG_PT=1 bit not" 2150c66ac9dbSNicholas Bellinger " present in received PROUT\n"); 2151de103c93SChristoph Hellwig ret = TCM_INVALID_CDB_FIELD; 2152bc118fe4SAndy Grover goto out; 2153c66ac9dbSNicholas Bellinger } 2154de103c93SChristoph Hellwig 2155c66ac9dbSNicholas Bellinger /* 215651d9c41dSAndy Grover * sa_res_key=1 Change Reservation Key for registered I_T Nexus. 2157c66ac9dbSNicholas Bellinger */ 215851d9c41dSAndy Grover if (sa_res_key) { 215951d9c41dSAndy Grover /* 216051d9c41dSAndy Grover * Increment PRgeneration counter for struct se_device" 216151d9c41dSAndy Grover * upon a successful REGISTER, see spc4r17 section 6.3.2 216251d9c41dSAndy Grover * READ_KEYS service action. 216351d9c41dSAndy Grover */ 216451d9c41dSAndy Grover pr_reg->pr_res_generation = core_scsi3_pr_generation(cmd->se_dev); 216551d9c41dSAndy Grover pr_reg->pr_res_key = sa_res_key; 216651d9c41dSAndy Grover pr_debug("SPC-3 PR [%s] REGISTER%s: Changed Reservation" 216751d9c41dSAndy Grover " Key for %s to: 0x%016Lx PRgeneration:" 216851d9c41dSAndy Grover " 0x%08x\n", cmd->se_tfo->get_fabric_name(), 216951d9c41dSAndy Grover (register_type == REGISTER_AND_IGNORE_EXISTING_KEY) ? "_AND_IGNORE_EXISTING_KEY" : "", 217051d9c41dSAndy Grover pr_reg->pr_reg_nacl->initiatorname, 217151d9c41dSAndy Grover pr_reg->pr_res_key, pr_reg->pr_res_generation); 217251d9c41dSAndy Grover 217351d9c41dSAndy Grover } else { 217451d9c41dSAndy Grover /* 217551d9c41dSAndy Grover * sa_res_key=0 Unregister Reservation Key for registered I_T Nexus. 217651d9c41dSAndy Grover */ 21776c3c9baaSNicholas Bellinger type = pr_reg->pr_res_type; 21786c3c9baaSNicholas Bellinger pr_holder = core_scsi3_check_implicit_release(cmd->se_dev, 21796c3c9baaSNicholas Bellinger pr_reg); 2180c66ac9dbSNicholas Bellinger if (pr_holder < 0) { 2181de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 2182bc118fe4SAndy Grover goto out; 2183c66ac9dbSNicholas Bellinger } 2184c66ac9dbSNicholas Bellinger 2185c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 2186c66ac9dbSNicholas Bellinger /* 2187c66ac9dbSNicholas Bellinger * Release all ALL_TG_PT=1 for the matching SCSI Initiator Port 2188c66ac9dbSNicholas Bellinger * and matching pr_res_key. 2189c66ac9dbSNicholas Bellinger */ 2190c66ac9dbSNicholas Bellinger if (pr_reg->pr_reg_all_tg_pt) { 2191c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg_p, pr_reg_tmp, 2192c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, 2193c66ac9dbSNicholas Bellinger pr_reg_list) { 2194c66ac9dbSNicholas Bellinger 21956708bb27SAndy Grover if (!pr_reg_p->pr_reg_all_tg_pt) 2196c66ac9dbSNicholas Bellinger continue; 2197c66ac9dbSNicholas Bellinger if (pr_reg_p->pr_res_key != res_key) 2198c66ac9dbSNicholas Bellinger continue; 2199c66ac9dbSNicholas Bellinger if (pr_reg == pr_reg_p) 2200c66ac9dbSNicholas Bellinger continue; 2201c66ac9dbSNicholas Bellinger if (strcmp(pr_reg->pr_reg_nacl->initiatorname, 2202c66ac9dbSNicholas Bellinger pr_reg_p->pr_reg_nacl->initiatorname)) 2203c66ac9dbSNicholas Bellinger continue; 2204c66ac9dbSNicholas Bellinger 2205c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, 2206c66ac9dbSNicholas Bellinger pr_reg_p, NULL, 0); 2207c66ac9dbSNicholas Bellinger } 2208c66ac9dbSNicholas Bellinger } 2209de103c93SChristoph Hellwig 2210c66ac9dbSNicholas Bellinger /* 2211c66ac9dbSNicholas Bellinger * Release the calling I_T Nexus registration now.. 2212c66ac9dbSNicholas Bellinger */ 2213de103c93SChristoph Hellwig __core_scsi3_free_registration(cmd->se_dev, pr_reg, NULL, 1); 2214fc09149dSNicholas Bellinger pr_reg = NULL; 2215de103c93SChristoph Hellwig 2216c66ac9dbSNicholas Bellinger /* 2217c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.11.3 Unregistering 2218c66ac9dbSNicholas Bellinger * 2219c66ac9dbSNicholas Bellinger * If the persistent reservation is a registrants only 2220c66ac9dbSNicholas Bellinger * type, the device server shall establish a unit 2221c66ac9dbSNicholas Bellinger * attention condition for the initiator port associated 2222c66ac9dbSNicholas Bellinger * with every registered I_T nexus except for the I_T 2223c66ac9dbSNicholas Bellinger * nexus on which the PERSISTENT RESERVE OUT command was 2224c66ac9dbSNicholas Bellinger * received, with the additional sense code set to 2225c66ac9dbSNicholas Bellinger * RESERVATIONS RELEASED. 2226c66ac9dbSNicholas Bellinger */ 2227c66ac9dbSNicholas Bellinger if (pr_holder && 2228fc09149dSNicholas Bellinger (type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY || 2229fc09149dSNicholas Bellinger type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY)) { 2230c66ac9dbSNicholas Bellinger list_for_each_entry(pr_reg_p, 2231c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, 2232c66ac9dbSNicholas Bellinger pr_reg_list) { 2233c66ac9dbSNicholas Bellinger 2234c51c8e7bSHannes Reinecke target_ua_allocate_lun( 2235c66ac9dbSNicholas Bellinger pr_reg_p->pr_reg_nacl, 2236c66ac9dbSNicholas Bellinger pr_reg_p->pr_res_mapped_lun, 2237c66ac9dbSNicholas Bellinger 0x2A, 2238c66ac9dbSNicholas Bellinger ASCQ_2AH_RESERVATIONS_RELEASED); 2239c66ac9dbSNicholas Bellinger } 2240c66ac9dbSNicholas Bellinger } 224151d9c41dSAndy Grover 2242c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 2243de103c93SChristoph Hellwig } 2244de103c93SChristoph Hellwig 2245459f213bSAndy Grover ret = core_scsi3_update_and_write_aptpl(dev, aptpl); 2246c66ac9dbSNicholas Bellinger 2247bc118fe4SAndy Grover out: 2248fc09149dSNicholas Bellinger if (pr_reg) 2249c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2250de103c93SChristoph Hellwig return ret; 2251c66ac9dbSNicholas Bellinger } 2252c66ac9dbSNicholas Bellinger 2253c66ac9dbSNicholas Bellinger unsigned char *core_scsi3_pr_dump_type(int type) 2254c66ac9dbSNicholas Bellinger { 2255c66ac9dbSNicholas Bellinger switch (type) { 2256c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE: 2257c66ac9dbSNicholas Bellinger return "Write Exclusive Access"; 2258c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS: 2259c66ac9dbSNicholas Bellinger return "Exclusive Access"; 2260c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: 2261c66ac9dbSNicholas Bellinger return "Write Exclusive Access, Registrants Only"; 2262c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: 2263c66ac9dbSNicholas Bellinger return "Exclusive Access, Registrants Only"; 2264c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: 2265c66ac9dbSNicholas Bellinger return "Write Exclusive Access, All Registrants"; 2266c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: 2267c66ac9dbSNicholas Bellinger return "Exclusive Access, All Registrants"; 2268c66ac9dbSNicholas Bellinger default: 2269c66ac9dbSNicholas Bellinger break; 2270c66ac9dbSNicholas Bellinger } 2271c66ac9dbSNicholas Bellinger 2272c66ac9dbSNicholas Bellinger return "Unknown SPC-3 PR Type"; 2273c66ac9dbSNicholas Bellinger } 2274c66ac9dbSNicholas Bellinger 2275de103c93SChristoph Hellwig static sense_reason_t 2276de103c93SChristoph Hellwig core_scsi3_pro_reserve(struct se_cmd *cmd, int type, int scope, u64 res_key) 2277c66ac9dbSNicholas Bellinger { 2278de103c93SChristoph Hellwig struct se_device *dev = cmd->se_dev; 2279e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 2280e3d6f909SAndy Grover struct se_lun *se_lun = cmd->se_lun; 2281c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_res_holder; 22820fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 2283c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 2284de103c93SChristoph Hellwig sense_reason_t ret; 2285c66ac9dbSNicholas Bellinger 2286c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 2287c66ac9dbSNicholas Bellinger 22886708bb27SAndy Grover if (!se_sess || !se_lun) { 22896708bb27SAndy Grover pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); 2290de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2291c66ac9dbSNicholas Bellinger } 2292c66ac9dbSNicholas Bellinger /* 2293c66ac9dbSNicholas Bellinger * Locate the existing *pr_reg via struct se_node_acl pointers 2294c66ac9dbSNicholas Bellinger */ 22955951146dSAndy Grover pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, 2296c66ac9dbSNicholas Bellinger se_sess); 22976708bb27SAndy Grover if (!pr_reg) { 22986708bb27SAndy Grover pr_err("SPC-3 PR: Unable to locate" 2299c66ac9dbSNicholas Bellinger " PR_REGISTERED *pr_reg for RESERVE\n"); 2300de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2301c66ac9dbSNicholas Bellinger } 2302c66ac9dbSNicholas Bellinger /* 2303c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2304c66ac9dbSNicholas Bellinger * 2305c66ac9dbSNicholas Bellinger * An application client creates a persistent reservation by issuing 2306c66ac9dbSNicholas Bellinger * a PERSISTENT RESERVE OUT command with RESERVE service action through 2307c66ac9dbSNicholas Bellinger * a registered I_T nexus with the following parameters: 2308c66ac9dbSNicholas Bellinger * a) RESERVATION KEY set to the value of the reservation key that is 2309c66ac9dbSNicholas Bellinger * registered with the logical unit for the I_T nexus; and 2310c66ac9dbSNicholas Bellinger */ 2311c66ac9dbSNicholas Bellinger if (res_key != pr_reg->pr_res_key) { 23126708bb27SAndy Grover pr_err("SPC-3 PR RESERVE: Received res_key: 0x%016Lx" 2313c66ac9dbSNicholas Bellinger " does not match existing SA REGISTER res_key:" 2314c66ac9dbSNicholas Bellinger " 0x%016Lx\n", res_key, pr_reg->pr_res_key); 2315de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 2316de103c93SChristoph Hellwig goto out_put_pr_reg; 2317c66ac9dbSNicholas Bellinger } 2318c66ac9dbSNicholas Bellinger /* 2319c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2320c66ac9dbSNicholas Bellinger * 2321c66ac9dbSNicholas Bellinger * From above: 2322c66ac9dbSNicholas Bellinger * b) TYPE field and SCOPE field set to the persistent reservation 2323c66ac9dbSNicholas Bellinger * being created. 2324c66ac9dbSNicholas Bellinger * 2325c66ac9dbSNicholas Bellinger * Only one persistent reservation is allowed at a time per logical unit 2326c66ac9dbSNicholas Bellinger * and that persistent reservation has a scope of LU_SCOPE. 2327c66ac9dbSNicholas Bellinger */ 2328c66ac9dbSNicholas Bellinger if (scope != PR_SCOPE_LU_SCOPE) { 23296708bb27SAndy Grover pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope); 2330de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 2331de103c93SChristoph Hellwig goto out_put_pr_reg; 2332c66ac9dbSNicholas Bellinger } 2333c66ac9dbSNicholas Bellinger /* 2334c66ac9dbSNicholas Bellinger * See if we have an existing PR reservation holder pointer at 2335c66ac9dbSNicholas Bellinger * struct se_device->dev_pr_res_holder in the form struct t10_pr_registration 2336c66ac9dbSNicholas Bellinger * *pr_res_holder. 2337c66ac9dbSNicholas Bellinger */ 2338c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 2339c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 2340ee1b1b9cSAndy Grover if (pr_res_holder) { 2341c66ac9dbSNicholas Bellinger /* 2342c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2343c66ac9dbSNicholas Bellinger * 2344c66ac9dbSNicholas Bellinger * If the device server receives a PERSISTENT RESERVE OUT 2345c66ac9dbSNicholas Bellinger * command from an I_T nexus other than a persistent reservation 2346c66ac9dbSNicholas Bellinger * holder (see 5.7.10) that attempts to create a persistent 2347c66ac9dbSNicholas Bellinger * reservation when a persistent reservation already exists for 2348c66ac9dbSNicholas Bellinger * the logical unit, then the command shall be completed with 2349c66ac9dbSNicholas Bellinger * RESERVATION CONFLICT status. 2350c66ac9dbSNicholas Bellinger */ 2351e673dc92SIlias Tsitsimpis if (!is_reservation_holder(pr_res_holder, pr_reg)) { 2352c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 23536708bb27SAndy Grover pr_err("SPC-3 PR: Attempted RESERVE from" 2354c66ac9dbSNicholas Bellinger " [%s]: %s while reservation already held by" 2355c66ac9dbSNicholas Bellinger " [%s]: %s, returning RESERVATION_CONFLICT\n", 2356e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), 2357c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, 2358e3d6f909SAndy Grover pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 2359c66ac9dbSNicholas Bellinger pr_res_holder->pr_reg_nacl->initiatorname); 2360c66ac9dbSNicholas Bellinger 2361c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2362de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 2363de103c93SChristoph Hellwig goto out_put_pr_reg; 2364c66ac9dbSNicholas Bellinger } 2365c66ac9dbSNicholas Bellinger /* 2366c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2367c66ac9dbSNicholas Bellinger * 2368c66ac9dbSNicholas Bellinger * If a persistent reservation holder attempts to modify the 2369c66ac9dbSNicholas Bellinger * type or scope of an existing persistent reservation, the 2370c66ac9dbSNicholas Bellinger * command shall be completed with RESERVATION CONFLICT status. 2371c66ac9dbSNicholas Bellinger */ 2372c66ac9dbSNicholas Bellinger if ((pr_res_holder->pr_res_type != type) || 2373c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_scope != scope)) { 2374c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 23756708bb27SAndy Grover pr_err("SPC-3 PR: Attempted RESERVE from" 2376c66ac9dbSNicholas Bellinger " [%s]: %s trying to change TYPE and/or SCOPE," 2377c66ac9dbSNicholas Bellinger " while reservation already held by [%s]: %s," 2378c66ac9dbSNicholas Bellinger " returning RESERVATION_CONFLICT\n", 2379e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), 2380c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, 2381e3d6f909SAndy Grover pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 2382c66ac9dbSNicholas Bellinger pr_res_holder->pr_reg_nacl->initiatorname); 2383c66ac9dbSNicholas Bellinger 2384c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2385de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 2386de103c93SChristoph Hellwig goto out_put_pr_reg; 2387c66ac9dbSNicholas Bellinger } 2388c66ac9dbSNicholas Bellinger /* 2389c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2390c66ac9dbSNicholas Bellinger * 2391c66ac9dbSNicholas Bellinger * If the device server receives a PERSISTENT RESERVE OUT 2392c66ac9dbSNicholas Bellinger * command with RESERVE service action where the TYPE field and 2393c66ac9dbSNicholas Bellinger * the SCOPE field contain the same values as the existing type 2394c66ac9dbSNicholas Bellinger * and scope from a persistent reservation holder, it shall not 2395c66ac9dbSNicholas Bellinger * make any change to the existing persistent reservation and 2396c66ac9dbSNicholas Bellinger * shall completethe command with GOOD status. 2397c66ac9dbSNicholas Bellinger */ 2398c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2399de103c93SChristoph Hellwig ret = 0; 2400de103c93SChristoph Hellwig goto out_put_pr_reg; 2401c66ac9dbSNicholas Bellinger } 2402c66ac9dbSNicholas Bellinger /* 2403c66ac9dbSNicholas Bellinger * Otherwise, our *pr_reg becomes the PR reservation holder for said 2404c66ac9dbSNicholas Bellinger * TYPE/SCOPE. Also set the received scope and type in *pr_reg. 2405c66ac9dbSNicholas Bellinger */ 2406c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope = scope; 2407c66ac9dbSNicholas Bellinger pr_reg->pr_res_type = type; 2408c66ac9dbSNicholas Bellinger pr_reg->pr_res_holder = 1; 2409c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = pr_reg; 2410d2843c17SAndy Grover core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 2411c66ac9dbSNicholas Bellinger 24126708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: RESERVE created new" 2413c66ac9dbSNicholas Bellinger " reservation holder TYPE: %s ALL_TG_PT: %d\n", 2414e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), core_scsi3_pr_dump_type(type), 2415c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); 24166708bb27SAndy Grover pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n", 2417e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), 2418c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, 2419d2843c17SAndy Grover i_buf); 2420c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2421c66ac9dbSNicholas Bellinger 2422459f213bSAndy Grover if (pr_tmpl->pr_aptpl_active) 2423459f213bSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, true); 2424c66ac9dbSNicholas Bellinger 2425de103c93SChristoph Hellwig ret = 0; 2426de103c93SChristoph Hellwig out_put_pr_reg: 2427de103c93SChristoph Hellwig core_scsi3_put_pr_reg(pr_reg); 2428de103c93SChristoph Hellwig return ret; 2429de103c93SChristoph Hellwig } 2430de103c93SChristoph Hellwig 2431de103c93SChristoph Hellwig static sense_reason_t 2432de103c93SChristoph Hellwig core_scsi3_emulate_pro_reserve(struct se_cmd *cmd, int type, int scope, 2433c66ac9dbSNicholas Bellinger u64 res_key) 2434c66ac9dbSNicholas Bellinger { 2435c66ac9dbSNicholas Bellinger switch (type) { 2436c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE: 2437c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS: 2438c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: 2439c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: 2440c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: 2441c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: 2442de103c93SChristoph Hellwig return core_scsi3_pro_reserve(cmd, type, scope, res_key); 2443c66ac9dbSNicholas Bellinger default: 24446708bb27SAndy Grover pr_err("SPC-3 PR: Unknown Service Action RESERVE Type:" 2445c66ac9dbSNicholas Bellinger " 0x%02x\n", type); 2446de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 2447c66ac9dbSNicholas Bellinger } 2448c66ac9dbSNicholas Bellinger } 2449c66ac9dbSNicholas Bellinger 2450c66ac9dbSNicholas Bellinger /* 2451c66ac9dbSNicholas Bellinger * Called with struct se_device->dev_reservation_lock held. 2452c66ac9dbSNicholas Bellinger */ 2453c66ac9dbSNicholas Bellinger static void __core_scsi3_complete_pro_release( 2454c66ac9dbSNicholas Bellinger struct se_device *dev, 2455c66ac9dbSNicholas Bellinger struct se_node_acl *se_nacl, 2456c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 24576c3c9baaSNicholas Bellinger int explicit, 24586c3c9baaSNicholas Bellinger int unreg) 2459c66ac9dbSNicholas Bellinger { 24609ac8928eSChristoph Hellwig const struct target_core_fabric_ops *tfo = se_nacl->se_tpg->se_tpg_tfo; 2461c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 24626c3c9baaSNicholas Bellinger int pr_res_type = 0, pr_res_scope = 0; 2463c66ac9dbSNicholas Bellinger 2464c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 2465d2843c17SAndy Grover core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 2466c66ac9dbSNicholas Bellinger /* 2467c66ac9dbSNicholas Bellinger * Go ahead and release the current PR reservation holder. 24686c3c9baaSNicholas Bellinger * If an All Registrants reservation is currently active and 24696c3c9baaSNicholas Bellinger * a unregister operation is requested, replace the current 24706c3c9baaSNicholas Bellinger * dev_pr_res_holder with another active registration. 2471c66ac9dbSNicholas Bellinger */ 24726c3c9baaSNicholas Bellinger if (dev->dev_pr_res_holder) { 24736c3c9baaSNicholas Bellinger pr_res_type = dev->dev_pr_res_holder->pr_res_type; 24746c3c9baaSNicholas Bellinger pr_res_scope = dev->dev_pr_res_holder->pr_res_scope; 24756c3c9baaSNicholas Bellinger dev->dev_pr_res_holder->pr_res_type = 0; 24766c3c9baaSNicholas Bellinger dev->dev_pr_res_holder->pr_res_scope = 0; 24776c3c9baaSNicholas Bellinger dev->dev_pr_res_holder->pr_res_holder = 0; 2478c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = NULL; 24796c3c9baaSNicholas Bellinger } 24806c3c9baaSNicholas Bellinger if (!unreg) 24816c3c9baaSNicholas Bellinger goto out; 2482c66ac9dbSNicholas Bellinger 24836c3c9baaSNicholas Bellinger spin_lock(&dev->t10_pr.registration_lock); 24846c3c9baaSNicholas Bellinger list_del_init(&pr_reg->pr_reg_list); 24856c3c9baaSNicholas Bellinger /* 24866c3c9baaSNicholas Bellinger * If the I_T nexus is a reservation holder, the persistent reservation 24876c3c9baaSNicholas Bellinger * is of an all registrants type, and the I_T nexus is the last remaining 24886c3c9baaSNicholas Bellinger * registered I_T nexus, then the device server shall also release the 24896c3c9baaSNicholas Bellinger * persistent reservation. 24906c3c9baaSNicholas Bellinger */ 24916c3c9baaSNicholas Bellinger if (!list_empty(&dev->t10_pr.registration_list) && 24926c3c9baaSNicholas Bellinger ((pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 24936c3c9baaSNicholas Bellinger (pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG))) { 24946c3c9baaSNicholas Bellinger dev->dev_pr_res_holder = 24956c3c9baaSNicholas Bellinger list_entry(dev->t10_pr.registration_list.next, 24966c3c9baaSNicholas Bellinger struct t10_pr_registration, pr_reg_list); 24976c3c9baaSNicholas Bellinger dev->dev_pr_res_holder->pr_res_type = pr_res_type; 24986c3c9baaSNicholas Bellinger dev->dev_pr_res_holder->pr_res_scope = pr_res_scope; 24996c3c9baaSNicholas Bellinger dev->dev_pr_res_holder->pr_res_holder = 1; 25006c3c9baaSNicholas Bellinger } 25016c3c9baaSNicholas Bellinger spin_unlock(&dev->t10_pr.registration_lock); 25026c3c9baaSNicholas Bellinger out: 25036c3c9baaSNicholas Bellinger if (!dev->dev_pr_res_holder) { 25046708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: %s RELEASE cleared" 2505c66ac9dbSNicholas Bellinger " reservation holder TYPE: %s ALL_TG_PT: %d\n", 25066c3c9baaSNicholas Bellinger tfo->get_fabric_name(), (explicit) ? "explicit" : 25076c3c9baaSNicholas Bellinger "implicit", core_scsi3_pr_dump_type(pr_res_type), 2508c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); 25096c3c9baaSNicholas Bellinger } 25106708bb27SAndy Grover pr_debug("SPC-3 PR [%s] RELEASE Node: %s%s\n", 2511c66ac9dbSNicholas Bellinger tfo->get_fabric_name(), se_nacl->initiatorname, 2512d2843c17SAndy Grover i_buf); 2513c66ac9dbSNicholas Bellinger /* 2514c66ac9dbSNicholas Bellinger * Clear TYPE and SCOPE for the next PROUT Service Action: RESERVE 2515c66ac9dbSNicholas Bellinger */ 2516c66ac9dbSNicholas Bellinger pr_reg->pr_res_holder = pr_reg->pr_res_type = pr_reg->pr_res_scope = 0; 2517c66ac9dbSNicholas Bellinger } 2518c66ac9dbSNicholas Bellinger 2519de103c93SChristoph Hellwig static sense_reason_t 2520de103c93SChristoph Hellwig core_scsi3_emulate_pro_release(struct se_cmd *cmd, int type, int scope, 2521c66ac9dbSNicholas Bellinger u64 res_key) 2522c66ac9dbSNicholas Bellinger { 2523c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 2524e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 2525e3d6f909SAndy Grover struct se_lun *se_lun = cmd->se_lun; 2526c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_res_holder; 25270fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 2528de103c93SChristoph Hellwig sense_reason_t ret = 0; 2529c66ac9dbSNicholas Bellinger 25306708bb27SAndy Grover if (!se_sess || !se_lun) { 25316708bb27SAndy Grover pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); 2532de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2533c66ac9dbSNicholas Bellinger } 2534c66ac9dbSNicholas Bellinger /* 2535c66ac9dbSNicholas Bellinger * Locate the existing *pr_reg via struct se_node_acl pointers 2536c66ac9dbSNicholas Bellinger */ 2537c66ac9dbSNicholas Bellinger pr_reg = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess); 25386708bb27SAndy Grover if (!pr_reg) { 25396708bb27SAndy Grover pr_err("SPC-3 PR: Unable to locate" 2540c66ac9dbSNicholas Bellinger " PR_REGISTERED *pr_reg for RELEASE\n"); 2541de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2542c66ac9dbSNicholas Bellinger } 2543c66ac9dbSNicholas Bellinger /* 2544c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.11.2 Releasing: 2545c66ac9dbSNicholas Bellinger * 2546c66ac9dbSNicholas Bellinger * If there is no persistent reservation or in response to a persistent 2547c66ac9dbSNicholas Bellinger * reservation release request from a registered I_T nexus that is not a 2548c66ac9dbSNicholas Bellinger * persistent reservation holder (see 5.7.10), the device server shall 2549c66ac9dbSNicholas Bellinger * do the following: 2550c66ac9dbSNicholas Bellinger * 2551c66ac9dbSNicholas Bellinger * a) Not release the persistent reservation, if any; 2552c66ac9dbSNicholas Bellinger * b) Not remove any registrations; and 2553c66ac9dbSNicholas Bellinger * c) Complete the command with GOOD status. 2554c66ac9dbSNicholas Bellinger */ 2555c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 2556c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 25576708bb27SAndy Grover if (!pr_res_holder) { 2558c66ac9dbSNicholas Bellinger /* 2559c66ac9dbSNicholas Bellinger * No persistent reservation, return GOOD status. 2560c66ac9dbSNicholas Bellinger */ 2561c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2562bb7a8c8eSNicholas Bellinger goto out_put_pr_reg; 2563c66ac9dbSNicholas Bellinger } 2564c66ac9dbSNicholas Bellinger 2565e673dc92SIlias Tsitsimpis if (!is_reservation_holder(pr_res_holder, pr_reg)) { 2566c66ac9dbSNicholas Bellinger /* 2567c66ac9dbSNicholas Bellinger * Release request from a registered I_T nexus that is not a 2568c66ac9dbSNicholas Bellinger * persistent reservation holder. return GOOD status. 2569c66ac9dbSNicholas Bellinger */ 2570c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2571de103c93SChristoph Hellwig goto out_put_pr_reg; 2572c66ac9dbSNicholas Bellinger } 2573de103c93SChristoph Hellwig 2574c66ac9dbSNicholas Bellinger /* 2575c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.11.2 Releasing: 2576c66ac9dbSNicholas Bellinger * 2577c66ac9dbSNicholas Bellinger * Only the persistent reservation holder (see 5.7.10) is allowed to 2578c66ac9dbSNicholas Bellinger * release a persistent reservation. 2579c66ac9dbSNicholas Bellinger * 2580c66ac9dbSNicholas Bellinger * An application client releases the persistent reservation by issuing 2581c66ac9dbSNicholas Bellinger * a PERSISTENT RESERVE OUT command with RELEASE service action through 2582c66ac9dbSNicholas Bellinger * an I_T nexus that is a persistent reservation holder with the 2583c66ac9dbSNicholas Bellinger * following parameters: 2584c66ac9dbSNicholas Bellinger * 2585c66ac9dbSNicholas Bellinger * a) RESERVATION KEY field set to the value of the reservation key 2586c66ac9dbSNicholas Bellinger * that is registered with the logical unit for the I_T nexus; 2587c66ac9dbSNicholas Bellinger */ 2588c66ac9dbSNicholas Bellinger if (res_key != pr_reg->pr_res_key) { 25896708bb27SAndy Grover pr_err("SPC-3 PR RELEASE: Received res_key: 0x%016Lx" 2590c66ac9dbSNicholas Bellinger " does not match existing SA REGISTER res_key:" 2591c66ac9dbSNicholas Bellinger " 0x%016Lx\n", res_key, pr_reg->pr_res_key); 2592c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2593de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 2594de103c93SChristoph Hellwig goto out_put_pr_reg; 2595c66ac9dbSNicholas Bellinger } 2596c66ac9dbSNicholas Bellinger /* 2597c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.11.2 Releasing and above: 2598c66ac9dbSNicholas Bellinger * 2599c66ac9dbSNicholas Bellinger * b) TYPE field and SCOPE field set to match the persistent 2600c66ac9dbSNicholas Bellinger * reservation being released. 2601c66ac9dbSNicholas Bellinger */ 2602c66ac9dbSNicholas Bellinger if ((pr_res_holder->pr_res_type != type) || 2603c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_scope != scope)) { 2604c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 26056708bb27SAndy Grover pr_err("SPC-3 PR RELEASE: Attempted to release" 2606c66ac9dbSNicholas Bellinger " reservation from [%s]: %s with different TYPE " 2607c66ac9dbSNicholas Bellinger "and/or SCOPE while reservation already held by" 2608c66ac9dbSNicholas Bellinger " [%s]: %s, returning RESERVATION_CONFLICT\n", 2609e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), 2610c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, 2611e3d6f909SAndy Grover pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 2612c66ac9dbSNicholas Bellinger pr_res_holder->pr_reg_nacl->initiatorname); 2613c66ac9dbSNicholas Bellinger 2614c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2615de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 2616de103c93SChristoph Hellwig goto out_put_pr_reg; 2617c66ac9dbSNicholas Bellinger } 2618c66ac9dbSNicholas Bellinger /* 2619c66ac9dbSNicholas Bellinger * In response to a persistent reservation release request from the 2620c66ac9dbSNicholas Bellinger * persistent reservation holder the device server shall perform a 2621c66ac9dbSNicholas Bellinger * release by doing the following as an uninterrupted series of actions: 2622c66ac9dbSNicholas Bellinger * a) Release the persistent reservation; 2623c66ac9dbSNicholas Bellinger * b) Not remove any registration(s); 2624c66ac9dbSNicholas Bellinger * c) If the released persistent reservation is a registrants only type 2625c66ac9dbSNicholas Bellinger * or all registrants type persistent reservation, 2626c66ac9dbSNicholas Bellinger * the device server shall establish a unit attention condition for 2627c66ac9dbSNicholas Bellinger * the initiator port associated with every regis- 2628c66ac9dbSNicholas Bellinger * tered I_T nexus other than I_T nexus on which the PERSISTENT 2629c66ac9dbSNicholas Bellinger * RESERVE OUT command with RELEASE service action was received, 2630c66ac9dbSNicholas Bellinger * with the additional sense code set to RESERVATIONS RELEASED; and 2631c66ac9dbSNicholas Bellinger * d) If the persistent reservation is of any other type, the device 2632c66ac9dbSNicholas Bellinger * server shall not establish a unit attention condition. 2633c66ac9dbSNicholas Bellinger */ 2634c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, se_sess->se_node_acl, 26356c3c9baaSNicholas Bellinger pr_reg, 1, 0); 2636c66ac9dbSNicholas Bellinger 2637c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2638c66ac9dbSNicholas Bellinger 2639c66ac9dbSNicholas Bellinger if ((type != PR_TYPE_WRITE_EXCLUSIVE_REGONLY) && 2640c66ac9dbSNicholas Bellinger (type != PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) && 2641c66ac9dbSNicholas Bellinger (type != PR_TYPE_WRITE_EXCLUSIVE_ALLREG) && 2642c66ac9dbSNicholas Bellinger (type != PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { 2643c66ac9dbSNicholas Bellinger /* 2644c66ac9dbSNicholas Bellinger * If no UNIT ATTENTION conditions will be established for 2645c66ac9dbSNicholas Bellinger * PR_TYPE_WRITE_EXCLUSIVE or PR_TYPE_EXCLUSIVE_ACCESS 2646c66ac9dbSNicholas Bellinger * go ahead and check for APTPL=1 update+write below 2647c66ac9dbSNicholas Bellinger */ 2648c66ac9dbSNicholas Bellinger goto write_aptpl; 2649c66ac9dbSNicholas Bellinger } 2650c66ac9dbSNicholas Bellinger 2651c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 2652c66ac9dbSNicholas Bellinger list_for_each_entry(pr_reg_p, &pr_tmpl->registration_list, 2653c66ac9dbSNicholas Bellinger pr_reg_list) { 2654c66ac9dbSNicholas Bellinger /* 2655c66ac9dbSNicholas Bellinger * Do not establish a UNIT ATTENTION condition 2656c66ac9dbSNicholas Bellinger * for the calling I_T Nexus 2657c66ac9dbSNicholas Bellinger */ 2658c66ac9dbSNicholas Bellinger if (pr_reg_p == pr_reg) 2659c66ac9dbSNicholas Bellinger continue; 2660c66ac9dbSNicholas Bellinger 2661c51c8e7bSHannes Reinecke target_ua_allocate_lun(pr_reg_p->pr_reg_nacl, 2662c66ac9dbSNicholas Bellinger pr_reg_p->pr_res_mapped_lun, 2663c66ac9dbSNicholas Bellinger 0x2A, ASCQ_2AH_RESERVATIONS_RELEASED); 2664c66ac9dbSNicholas Bellinger } 2665c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 2666c66ac9dbSNicholas Bellinger 2667c66ac9dbSNicholas Bellinger write_aptpl: 2668459f213bSAndy Grover if (pr_tmpl->pr_aptpl_active) 2669459f213bSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, true); 2670459f213bSAndy Grover 2671de103c93SChristoph Hellwig out_put_pr_reg: 2672c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2673de103c93SChristoph Hellwig return ret; 2674c66ac9dbSNicholas Bellinger } 2675c66ac9dbSNicholas Bellinger 2676de103c93SChristoph Hellwig static sense_reason_t 2677de103c93SChristoph Hellwig core_scsi3_emulate_pro_clear(struct se_cmd *cmd, u64 res_key) 2678c66ac9dbSNicholas Bellinger { 2679c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 2680c66ac9dbSNicholas Bellinger struct se_node_acl *pr_reg_nacl; 2681e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 26820fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 2683c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder; 2684f2d30680SHannes Reinecke u64 pr_res_mapped_lun = 0; 2685c66ac9dbSNicholas Bellinger int calling_it_nexus = 0; 2686c66ac9dbSNicholas Bellinger /* 2687c66ac9dbSNicholas Bellinger * Locate the existing *pr_reg via struct se_node_acl pointers 2688c66ac9dbSNicholas Bellinger */ 26895951146dSAndy Grover pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, 2690c66ac9dbSNicholas Bellinger se_sess->se_node_acl, se_sess); 26916708bb27SAndy Grover if (!pr_reg_n) { 26926708bb27SAndy Grover pr_err("SPC-3 PR: Unable to locate" 2693c66ac9dbSNicholas Bellinger " PR_REGISTERED *pr_reg for CLEAR\n"); 2694de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2695c66ac9dbSNicholas Bellinger } 2696c66ac9dbSNicholas Bellinger /* 2697c66ac9dbSNicholas Bellinger * From spc4r17 section 5.7.11.6, Clearing: 2698c66ac9dbSNicholas Bellinger * 2699c66ac9dbSNicholas Bellinger * Any application client may release the persistent reservation and 2700c66ac9dbSNicholas Bellinger * remove all registrations from a device server by issuing a 2701c66ac9dbSNicholas Bellinger * PERSISTENT RESERVE OUT command with CLEAR service action through a 2702c66ac9dbSNicholas Bellinger * registered I_T nexus with the following parameter: 2703c66ac9dbSNicholas Bellinger * 2704c66ac9dbSNicholas Bellinger * a) RESERVATION KEY field set to the value of the reservation key 2705c66ac9dbSNicholas Bellinger * that is registered with the logical unit for the I_T nexus. 2706c66ac9dbSNicholas Bellinger */ 2707c66ac9dbSNicholas Bellinger if (res_key != pr_reg_n->pr_res_key) { 27086708bb27SAndy Grover pr_err("SPC-3 PR REGISTER: Received" 2709c66ac9dbSNicholas Bellinger " res_key: 0x%016Lx does not match" 2710c66ac9dbSNicholas Bellinger " existing SA REGISTER res_key:" 2711c66ac9dbSNicholas Bellinger " 0x%016Lx\n", res_key, pr_reg_n->pr_res_key); 2712c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 2713de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 2714c66ac9dbSNicholas Bellinger } 2715c66ac9dbSNicholas Bellinger /* 2716c66ac9dbSNicholas Bellinger * a) Release the persistent reservation, if any; 2717c66ac9dbSNicholas Bellinger */ 2718c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 2719c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 2720c66ac9dbSNicholas Bellinger if (pr_res_holder) { 2721c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 2722c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, pr_res_nacl, 27236c3c9baaSNicholas Bellinger pr_res_holder, 0, 0); 2724c66ac9dbSNicholas Bellinger } 2725c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2726c66ac9dbSNicholas Bellinger /* 2727c66ac9dbSNicholas Bellinger * b) Remove all registration(s) (see spc4r17 5.7.7); 2728c66ac9dbSNicholas Bellinger */ 2729c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 2730c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 2731c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 2732c66ac9dbSNicholas Bellinger 2733c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 2734c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 2735c66ac9dbSNicholas Bellinger pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; 2736c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, NULL, 2737c66ac9dbSNicholas Bellinger calling_it_nexus); 2738c66ac9dbSNicholas Bellinger /* 2739c66ac9dbSNicholas Bellinger * e) Establish a unit attention condition for the initiator 2740c66ac9dbSNicholas Bellinger * port associated with every registered I_T nexus other 2741c66ac9dbSNicholas Bellinger * than the I_T nexus on which the PERSISTENT RESERVE OUT 2742c66ac9dbSNicholas Bellinger * command with CLEAR service action was received, with the 2743c66ac9dbSNicholas Bellinger * additional sense code set to RESERVATIONS PREEMPTED. 2744c66ac9dbSNicholas Bellinger */ 27456708bb27SAndy Grover if (!calling_it_nexus) 2746c51c8e7bSHannes Reinecke target_ua_allocate_lun(pr_reg_nacl, pr_res_mapped_lun, 2747c66ac9dbSNicholas Bellinger 0x2A, ASCQ_2AH_RESERVATIONS_PREEMPTED); 2748c66ac9dbSNicholas Bellinger } 2749c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 2750c66ac9dbSNicholas Bellinger 27516708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: CLEAR complete\n", 2752e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name()); 2753c66ac9dbSNicholas Bellinger 2754459f213bSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, false); 2755c66ac9dbSNicholas Bellinger 2756c66ac9dbSNicholas Bellinger core_scsi3_pr_generation(dev); 2757c66ac9dbSNicholas Bellinger return 0; 2758c66ac9dbSNicholas Bellinger } 2759c66ac9dbSNicholas Bellinger 2760c66ac9dbSNicholas Bellinger /* 2761c66ac9dbSNicholas Bellinger * Called with struct se_device->dev_reservation_lock held. 2762c66ac9dbSNicholas Bellinger */ 2763c66ac9dbSNicholas Bellinger static void __core_scsi3_complete_pro_preempt( 2764c66ac9dbSNicholas Bellinger struct se_device *dev, 2765c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 2766c66ac9dbSNicholas Bellinger struct list_head *preempt_and_abort_list, 2767c66ac9dbSNicholas Bellinger int type, 2768c66ac9dbSNicholas Bellinger int scope, 276933ce6a87SAndy Grover enum preempt_type preempt_type) 2770c66ac9dbSNicholas Bellinger { 2771c66ac9dbSNicholas Bellinger struct se_node_acl *nacl = pr_reg->pr_reg_nacl; 27729ac8928eSChristoph Hellwig const struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; 2773c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 2774c66ac9dbSNicholas Bellinger 2775c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 2776d2843c17SAndy Grover core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 2777c66ac9dbSNicholas Bellinger /* 2778125d0119SHannes Reinecke * Do an implicit RELEASE of the existing reservation. 2779c66ac9dbSNicholas Bellinger */ 2780c66ac9dbSNicholas Bellinger if (dev->dev_pr_res_holder) 2781c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, nacl, 27826c3c9baaSNicholas Bellinger dev->dev_pr_res_holder, 0, 0); 2783c66ac9dbSNicholas Bellinger 2784c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = pr_reg; 2785c66ac9dbSNicholas Bellinger pr_reg->pr_res_holder = 1; 2786c66ac9dbSNicholas Bellinger pr_reg->pr_res_type = type; 2787c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope = scope; 2788c66ac9dbSNicholas Bellinger 27896708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: PREEMPT%s created new" 2790c66ac9dbSNicholas Bellinger " reservation holder TYPE: %s ALL_TG_PT: %d\n", 279133ce6a87SAndy Grover tfo->get_fabric_name(), (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : "", 2792c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(type), 2793c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); 27946708bb27SAndy Grover pr_debug("SPC-3 PR [%s] PREEMPT%s from Node: %s%s\n", 279533ce6a87SAndy Grover tfo->get_fabric_name(), (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : "", 2796d2843c17SAndy Grover nacl->initiatorname, i_buf); 2797c66ac9dbSNicholas Bellinger /* 2798c66ac9dbSNicholas Bellinger * For PREEMPT_AND_ABORT, add the preempting reservation's 2799c66ac9dbSNicholas Bellinger * struct t10_pr_registration to the list that will be compared 2800c66ac9dbSNicholas Bellinger * against received CDBs.. 2801c66ac9dbSNicholas Bellinger */ 2802c66ac9dbSNicholas Bellinger if (preempt_and_abort_list) 2803c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg->pr_reg_abort_list, 2804c66ac9dbSNicholas Bellinger preempt_and_abort_list); 2805c66ac9dbSNicholas Bellinger } 2806c66ac9dbSNicholas Bellinger 2807c66ac9dbSNicholas Bellinger static void core_scsi3_release_preempt_and_abort( 2808c66ac9dbSNicholas Bellinger struct list_head *preempt_and_abort_list, 2809c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg_holder) 2810c66ac9dbSNicholas Bellinger { 2811c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp; 2812c66ac9dbSNicholas Bellinger 2813c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, preempt_and_abort_list, 2814c66ac9dbSNicholas Bellinger pr_reg_abort_list) { 2815c66ac9dbSNicholas Bellinger 2816c66ac9dbSNicholas Bellinger list_del(&pr_reg->pr_reg_abort_list); 2817c66ac9dbSNicholas Bellinger if (pr_reg_holder == pr_reg) 2818c66ac9dbSNicholas Bellinger continue; 2819c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_holder) { 28206708bb27SAndy Grover pr_warn("pr_reg->pr_res_holder still set\n"); 2821c66ac9dbSNicholas Bellinger continue; 2822c66ac9dbSNicholas Bellinger } 2823c66ac9dbSNicholas Bellinger 2824c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve = NULL; 2825c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = NULL; 2826c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 2827c66ac9dbSNicholas Bellinger } 2828c66ac9dbSNicholas Bellinger } 2829c66ac9dbSNicholas Bellinger 2830de103c93SChristoph Hellwig static sense_reason_t 2831de103c93SChristoph Hellwig core_scsi3_pro_preempt(struct se_cmd *cmd, int type, int scope, u64 res_key, 283233ce6a87SAndy Grover u64 sa_res_key, enum preempt_type preempt_type) 2833c66ac9dbSNicholas Bellinger { 28345951146dSAndy Grover struct se_device *dev = cmd->se_dev; 2835c66ac9dbSNicholas Bellinger struct se_node_acl *pr_reg_nacl; 2836e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 2837d0f474e5SRoland Dreier LIST_HEAD(preempt_and_abort_list); 2838c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder; 28390fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 2840f2d30680SHannes Reinecke u64 pr_res_mapped_lun = 0; 2841b6932ee3SSteven Allen int all_reg = 0, calling_it_nexus = 0; 2842b6932ee3SSteven Allen bool sa_res_key_unmatched = sa_res_key != 0; 2843de103c93SChristoph Hellwig int prh_type = 0, prh_scope = 0; 2844c66ac9dbSNicholas Bellinger 2845de103c93SChristoph Hellwig if (!se_sess) 2846de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2847c66ac9dbSNicholas Bellinger 28485951146dSAndy Grover pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, 2849c66ac9dbSNicholas Bellinger se_sess); 28506708bb27SAndy Grover if (!pr_reg_n) { 28516708bb27SAndy Grover pr_err("SPC-3 PR: Unable to locate" 2852c66ac9dbSNicholas Bellinger " PR_REGISTERED *pr_reg for PREEMPT%s\n", 285333ce6a87SAndy Grover (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : ""); 2854de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 2855c66ac9dbSNicholas Bellinger } 2856c66ac9dbSNicholas Bellinger if (pr_reg_n->pr_res_key != res_key) { 2857c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 2858de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 2859c66ac9dbSNicholas Bellinger } 2860c66ac9dbSNicholas Bellinger if (scope != PR_SCOPE_LU_SCOPE) { 28616708bb27SAndy Grover pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope); 2862c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 2863de103c93SChristoph Hellwig return TCM_INVALID_PARAMETER_LIST; 2864c66ac9dbSNicholas Bellinger } 2865c66ac9dbSNicholas Bellinger 2866c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 2867c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 2868c66ac9dbSNicholas Bellinger if (pr_res_holder && 2869c66ac9dbSNicholas Bellinger ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 2870c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG))) 2871c66ac9dbSNicholas Bellinger all_reg = 1; 2872c66ac9dbSNicholas Bellinger 28736708bb27SAndy Grover if (!all_reg && !sa_res_key) { 2874c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2875c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 2876de103c93SChristoph Hellwig return TCM_INVALID_PARAMETER_LIST; 2877c66ac9dbSNicholas Bellinger } 2878c66ac9dbSNicholas Bellinger /* 2879c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.11.4.4 Removing Registrations: 2880c66ac9dbSNicholas Bellinger * 2881c66ac9dbSNicholas Bellinger * If the SERVICE ACTION RESERVATION KEY field does not identify a 2882c66ac9dbSNicholas Bellinger * persistent reservation holder or there is no persistent reservation 2883c66ac9dbSNicholas Bellinger * holder (i.e., there is no persistent reservation), then the device 2884c66ac9dbSNicholas Bellinger * server shall perform a preempt by doing the following in an 2885c66ac9dbSNicholas Bellinger * uninterrupted series of actions. (See below..) 2886c66ac9dbSNicholas Bellinger */ 28876708bb27SAndy Grover if (!pr_res_holder || (pr_res_holder->pr_res_key != sa_res_key)) { 2888c66ac9dbSNicholas Bellinger /* 2889c66ac9dbSNicholas Bellinger * No existing or SA Reservation Key matching reservations.. 2890c66ac9dbSNicholas Bellinger * 2891c66ac9dbSNicholas Bellinger * PROUT SA PREEMPT with All Registrant type reservations are 2892c66ac9dbSNicholas Bellinger * allowed to be processed without a matching SA Reservation Key 2893c66ac9dbSNicholas Bellinger */ 2894c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 2895c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 2896c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 2897c66ac9dbSNicholas Bellinger /* 2898c66ac9dbSNicholas Bellinger * Removing of registrations in non all registrants 2899c66ac9dbSNicholas Bellinger * type reservations without a matching SA reservation 2900c66ac9dbSNicholas Bellinger * key. 2901c66ac9dbSNicholas Bellinger * 2902c66ac9dbSNicholas Bellinger * a) Remove the registrations for all I_T nexuses 2903c66ac9dbSNicholas Bellinger * specified by the SERVICE ACTION RESERVATION KEY 2904c66ac9dbSNicholas Bellinger * field; 2905c66ac9dbSNicholas Bellinger * b) Ignore the contents of the SCOPE and TYPE fields; 2906c66ac9dbSNicholas Bellinger * c) Process tasks as defined in 5.7.1; and 2907c66ac9dbSNicholas Bellinger * d) Establish a unit attention condition for the 2908c66ac9dbSNicholas Bellinger * initiator port associated with every I_T nexus 2909c66ac9dbSNicholas Bellinger * that lost its registration other than the I_T 2910c66ac9dbSNicholas Bellinger * nexus on which the PERSISTENT RESERVE OUT command 2911c66ac9dbSNicholas Bellinger * was received, with the additional sense code set 2912c66ac9dbSNicholas Bellinger * to REGISTRATIONS PREEMPTED. 2913c66ac9dbSNicholas Bellinger */ 29146708bb27SAndy Grover if (!all_reg) { 2915c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_key != sa_res_key) 2916c66ac9dbSNicholas Bellinger continue; 2917b6932ee3SSteven Allen sa_res_key_unmatched = false; 2918c66ac9dbSNicholas Bellinger 2919c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 2920c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 2921c66ac9dbSNicholas Bellinger pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; 2922c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, 292333ce6a87SAndy Grover (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : 2924c66ac9dbSNicholas Bellinger NULL, calling_it_nexus); 2925c66ac9dbSNicholas Bellinger } else { 2926c66ac9dbSNicholas Bellinger /* 2927c66ac9dbSNicholas Bellinger * Case for any existing all registrants type 2928c66ac9dbSNicholas Bellinger * reservation, follow logic in spc4r17 section 2929c66ac9dbSNicholas Bellinger * 5.7.11.4 Preempting, Table 52 and Figure 7. 2930c66ac9dbSNicholas Bellinger * 2931c66ac9dbSNicholas Bellinger * For a ZERO SA Reservation key, release 2932125d0119SHannes Reinecke * all other registrations and do an implicit 2933c66ac9dbSNicholas Bellinger * release of active persistent reservation. 2934c66ac9dbSNicholas Bellinger * 2935c66ac9dbSNicholas Bellinger * For a non-ZERO SA Reservation key, only 2936c66ac9dbSNicholas Bellinger * release the matching reservation key from 2937c66ac9dbSNicholas Bellinger * registrations. 2938c66ac9dbSNicholas Bellinger */ 2939c66ac9dbSNicholas Bellinger if ((sa_res_key) && 2940c66ac9dbSNicholas Bellinger (pr_reg->pr_res_key != sa_res_key)) 2941c66ac9dbSNicholas Bellinger continue; 2942b6932ee3SSteven Allen sa_res_key_unmatched = false; 2943c66ac9dbSNicholas Bellinger 2944c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 2945c66ac9dbSNicholas Bellinger if (calling_it_nexus) 2946c66ac9dbSNicholas Bellinger continue; 2947c66ac9dbSNicholas Bellinger 2948c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 2949c66ac9dbSNicholas Bellinger pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; 2950c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, 295133ce6a87SAndy Grover (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : 2952c66ac9dbSNicholas Bellinger NULL, 0); 2953c66ac9dbSNicholas Bellinger } 29546708bb27SAndy Grover if (!calling_it_nexus) 2955c51c8e7bSHannes Reinecke target_ua_allocate_lun(pr_reg_nacl, 2956c66ac9dbSNicholas Bellinger pr_res_mapped_lun, 0x2A, 29579e08e34eSMarco Sanvido ASCQ_2AH_REGISTRATIONS_PREEMPTED); 2958c66ac9dbSNicholas Bellinger } 2959c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 2960c66ac9dbSNicholas Bellinger /* 2961c66ac9dbSNicholas Bellinger * If a PERSISTENT RESERVE OUT with a PREEMPT service action or 2962c66ac9dbSNicholas Bellinger * a PREEMPT AND ABORT service action sets the SERVICE ACTION 2963c66ac9dbSNicholas Bellinger * RESERVATION KEY field to a value that does not match any 2964c66ac9dbSNicholas Bellinger * registered reservation key, then the device server shall 2965c66ac9dbSNicholas Bellinger * complete the command with RESERVATION CONFLICT status. 2966c66ac9dbSNicholas Bellinger */ 2967b6932ee3SSteven Allen if (sa_res_key_unmatched) { 2968c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2969c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 2970de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 2971c66ac9dbSNicholas Bellinger } 2972c66ac9dbSNicholas Bellinger /* 2973c66ac9dbSNicholas Bellinger * For an existing all registrants type reservation 2974c66ac9dbSNicholas Bellinger * with a zero SA rservation key, preempt the existing 2975c66ac9dbSNicholas Bellinger * reservation with the new PR type and scope. 2976c66ac9dbSNicholas Bellinger */ 2977c66ac9dbSNicholas Bellinger if (pr_res_holder && all_reg && !(sa_res_key)) { 2978c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_preempt(dev, pr_reg_n, 297933ce6a87SAndy Grover (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : NULL, 298033ce6a87SAndy Grover type, scope, preempt_type); 2981c66ac9dbSNicholas Bellinger 298233ce6a87SAndy Grover if (preempt_type == PREEMPT_AND_ABORT) 2983c66ac9dbSNicholas Bellinger core_scsi3_release_preempt_and_abort( 2984c66ac9dbSNicholas Bellinger &preempt_and_abort_list, pr_reg_n); 2985c66ac9dbSNicholas Bellinger } 2986c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2987c66ac9dbSNicholas Bellinger 2988459f213bSAndy Grover if (pr_tmpl->pr_aptpl_active) 2989459f213bSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, true); 2990c66ac9dbSNicholas Bellinger 2991c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 29925951146dSAndy Grover core_scsi3_pr_generation(cmd->se_dev); 2993c66ac9dbSNicholas Bellinger return 0; 2994c66ac9dbSNicholas Bellinger } 2995c66ac9dbSNicholas Bellinger /* 2996c66ac9dbSNicholas Bellinger * The PREEMPTing SA reservation key matches that of the 2997c66ac9dbSNicholas Bellinger * existing persistent reservation, first, we check if 2998c66ac9dbSNicholas Bellinger * we are preempting our own reservation. 2999c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.11.4.3 Preempting 3000c66ac9dbSNicholas Bellinger * persistent reservations and registration handling 3001c66ac9dbSNicholas Bellinger * 3002c66ac9dbSNicholas Bellinger * If an all registrants persistent reservation is not 3003c66ac9dbSNicholas Bellinger * present, it is not an error for the persistent 3004c66ac9dbSNicholas Bellinger * reservation holder to preempt itself (i.e., a 3005c66ac9dbSNicholas Bellinger * PERSISTENT RESERVE OUT with a PREEMPT service action 3006c66ac9dbSNicholas Bellinger * or a PREEMPT AND ABORT service action with the 3007c66ac9dbSNicholas Bellinger * SERVICE ACTION RESERVATION KEY value equal to the 3008c66ac9dbSNicholas Bellinger * persistent reservation holder's reservation key that 3009c66ac9dbSNicholas Bellinger * is received from the persistent reservation holder). 3010c66ac9dbSNicholas Bellinger * In that case, the device server shall establish the 3011c66ac9dbSNicholas Bellinger * new persistent reservation and maintain the 3012c66ac9dbSNicholas Bellinger * registration. 3013c66ac9dbSNicholas Bellinger */ 3014c66ac9dbSNicholas Bellinger prh_type = pr_res_holder->pr_res_type; 3015c66ac9dbSNicholas Bellinger prh_scope = pr_res_holder->pr_res_scope; 3016c66ac9dbSNicholas Bellinger /* 3017c66ac9dbSNicholas Bellinger * If the SERVICE ACTION RESERVATION KEY field identifies a 3018c66ac9dbSNicholas Bellinger * persistent reservation holder (see 5.7.10), the device 3019c66ac9dbSNicholas Bellinger * server shall perform a preempt by doing the following as 3020c66ac9dbSNicholas Bellinger * an uninterrupted series of actions: 3021c66ac9dbSNicholas Bellinger * 3022c66ac9dbSNicholas Bellinger * a) Release the persistent reservation for the holder 3023c66ac9dbSNicholas Bellinger * identified by the SERVICE ACTION RESERVATION KEY field; 3024c66ac9dbSNicholas Bellinger */ 3025c66ac9dbSNicholas Bellinger if (pr_reg_n != pr_res_holder) 3026c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, 3027c66ac9dbSNicholas Bellinger pr_res_holder->pr_reg_nacl, 30286c3c9baaSNicholas Bellinger dev->dev_pr_res_holder, 0, 0); 3029c66ac9dbSNicholas Bellinger /* 3030c66ac9dbSNicholas Bellinger * b) Remove the registrations for all I_T nexuses identified 3031c66ac9dbSNicholas Bellinger * by the SERVICE ACTION RESERVATION KEY field, except the 3032c66ac9dbSNicholas Bellinger * I_T nexus that is being used for the PERSISTENT RESERVE 3033c66ac9dbSNicholas Bellinger * OUT command. If an all registrants persistent reservation 3034c66ac9dbSNicholas Bellinger * is present and the SERVICE ACTION RESERVATION KEY field 3035c66ac9dbSNicholas Bellinger * is set to zero, then all registrations shall be removed 3036c66ac9dbSNicholas Bellinger * except for that of the I_T nexus that is being used for 3037c66ac9dbSNicholas Bellinger * the PERSISTENT RESERVE OUT command; 3038c66ac9dbSNicholas Bellinger */ 3039c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 3040c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 3041c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 3042c66ac9dbSNicholas Bellinger 3043c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 3044c66ac9dbSNicholas Bellinger if (calling_it_nexus) 3045c66ac9dbSNicholas Bellinger continue; 3046c66ac9dbSNicholas Bellinger 3047c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_key != sa_res_key) 3048c66ac9dbSNicholas Bellinger continue; 3049c66ac9dbSNicholas Bellinger 3050c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 3051c66ac9dbSNicholas Bellinger pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; 3052c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, 305333ce6a87SAndy Grover (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : NULL, 3054c66ac9dbSNicholas Bellinger calling_it_nexus); 3055c66ac9dbSNicholas Bellinger /* 3056c66ac9dbSNicholas Bellinger * e) Establish a unit attention condition for the initiator 3057c66ac9dbSNicholas Bellinger * port associated with every I_T nexus that lost its 3058c66ac9dbSNicholas Bellinger * persistent reservation and/or registration, with the 3059c66ac9dbSNicholas Bellinger * additional sense code set to REGISTRATIONS PREEMPTED; 3060c66ac9dbSNicholas Bellinger */ 3061c51c8e7bSHannes Reinecke target_ua_allocate_lun(pr_reg_nacl, pr_res_mapped_lun, 0x2A, 30629e08e34eSMarco Sanvido ASCQ_2AH_REGISTRATIONS_PREEMPTED); 3063c66ac9dbSNicholas Bellinger } 3064c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 3065c66ac9dbSNicholas Bellinger /* 3066c66ac9dbSNicholas Bellinger * c) Establish a persistent reservation for the preempting 3067c66ac9dbSNicholas Bellinger * I_T nexus using the contents of the SCOPE and TYPE fields; 3068c66ac9dbSNicholas Bellinger */ 3069c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_preempt(dev, pr_reg_n, 307033ce6a87SAndy Grover (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : NULL, 307133ce6a87SAndy Grover type, scope, preempt_type); 3072c66ac9dbSNicholas Bellinger /* 3073c66ac9dbSNicholas Bellinger * d) Process tasks as defined in 5.7.1; 3074c66ac9dbSNicholas Bellinger * e) See above.. 3075c66ac9dbSNicholas Bellinger * f) If the type or scope has changed, then for every I_T nexus 3076c66ac9dbSNicholas Bellinger * whose reservation key was not removed, except for the I_T 3077c66ac9dbSNicholas Bellinger * nexus on which the PERSISTENT RESERVE OUT command was 3078c66ac9dbSNicholas Bellinger * received, the device server shall establish a unit 3079c66ac9dbSNicholas Bellinger * attention condition for the initiator port associated with 3080c66ac9dbSNicholas Bellinger * that I_T nexus, with the additional sense code set to 3081c66ac9dbSNicholas Bellinger * RESERVATIONS RELEASED. If the type or scope have not 3082c66ac9dbSNicholas Bellinger * changed, then no unit attention condition(s) shall be 3083c66ac9dbSNicholas Bellinger * established for this reason. 3084c66ac9dbSNicholas Bellinger */ 3085c66ac9dbSNicholas Bellinger if ((prh_type != type) || (prh_scope != scope)) { 3086c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 3087c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 3088c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 3089c66ac9dbSNicholas Bellinger 3090c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 3091c66ac9dbSNicholas Bellinger if (calling_it_nexus) 3092c66ac9dbSNicholas Bellinger continue; 3093c66ac9dbSNicholas Bellinger 3094c51c8e7bSHannes Reinecke target_ua_allocate_lun(pr_reg->pr_reg_nacl, 3095c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun, 0x2A, 3096c66ac9dbSNicholas Bellinger ASCQ_2AH_RESERVATIONS_RELEASED); 3097c66ac9dbSNicholas Bellinger } 3098c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 3099c66ac9dbSNicholas Bellinger } 3100c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3101c66ac9dbSNicholas Bellinger /* 3102c66ac9dbSNicholas Bellinger * Call LUN_RESET logic upon list of struct t10_pr_registration, 3103c66ac9dbSNicholas Bellinger * All received CDBs for the matching existing reservation and 3104c66ac9dbSNicholas Bellinger * registrations undergo ABORT_TASK logic. 3105c66ac9dbSNicholas Bellinger * 3106c66ac9dbSNicholas Bellinger * From there, core_scsi3_release_preempt_and_abort() will 3107c66ac9dbSNicholas Bellinger * release every registration in the list (which have already 3108c66ac9dbSNicholas Bellinger * been removed from the primary pr_reg list), except the 3109c66ac9dbSNicholas Bellinger * new persistent reservation holder, the calling Initiator Port. 3110c66ac9dbSNicholas Bellinger */ 311133ce6a87SAndy Grover if (preempt_type == PREEMPT_AND_ABORT) { 3112c66ac9dbSNicholas Bellinger core_tmr_lun_reset(dev, NULL, &preempt_and_abort_list, cmd); 3113c66ac9dbSNicholas Bellinger core_scsi3_release_preempt_and_abort(&preempt_and_abort_list, 3114c66ac9dbSNicholas Bellinger pr_reg_n); 3115c66ac9dbSNicholas Bellinger } 3116c66ac9dbSNicholas Bellinger 3117459f213bSAndy Grover if (pr_tmpl->pr_aptpl_active) 3118459f213bSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, true); 3119c66ac9dbSNicholas Bellinger 3120c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 31215951146dSAndy Grover core_scsi3_pr_generation(cmd->se_dev); 3122c66ac9dbSNicholas Bellinger return 0; 3123c66ac9dbSNicholas Bellinger } 3124c66ac9dbSNicholas Bellinger 3125de103c93SChristoph Hellwig static sense_reason_t 3126de103c93SChristoph Hellwig core_scsi3_emulate_pro_preempt(struct se_cmd *cmd, int type, int scope, 312733ce6a87SAndy Grover u64 res_key, u64 sa_res_key, enum preempt_type preempt_type) 3128c66ac9dbSNicholas Bellinger { 3129c66ac9dbSNicholas Bellinger switch (type) { 3130c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE: 3131c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS: 3132c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: 3133c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: 3134c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: 3135c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: 3136de103c93SChristoph Hellwig return core_scsi3_pro_preempt(cmd, type, scope, res_key, 313733ce6a87SAndy Grover sa_res_key, preempt_type); 3138c66ac9dbSNicholas Bellinger default: 31396708bb27SAndy Grover pr_err("SPC-3 PR: Unknown Service Action PREEMPT%s" 314033ce6a87SAndy Grover " Type: 0x%02x\n", (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : "", type); 3141de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 3142c66ac9dbSNicholas Bellinger } 3143c66ac9dbSNicholas Bellinger } 3144c66ac9dbSNicholas Bellinger 3145c66ac9dbSNicholas Bellinger 3146de103c93SChristoph Hellwig static sense_reason_t 3147de103c93SChristoph Hellwig core_scsi3_emulate_pro_register_and_move(struct se_cmd *cmd, u64 res_key, 3148de103c93SChristoph Hellwig u64 sa_res_key, int aptpl, int unreg) 3149c66ac9dbSNicholas Bellinger { 3150e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 31515951146dSAndy Grover struct se_device *dev = cmd->se_dev; 315228168905SJörn Engel struct se_dev_entry *dest_se_deve = NULL; 3153adf653f9SChristoph Hellwig struct se_lun *se_lun = cmd->se_lun, *tmp_lun; 3154c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl, *pr_reg_nacl, *dest_node_acl = NULL; 3155c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg, *dest_se_tpg = NULL; 31569ac8928eSChristoph Hellwig const struct target_core_fabric_ops *dest_tf_ops = NULL, *tf_ops; 3157c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_res_holder, *dest_pr_reg; 31580fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 315905d1c7c0SAndy Grover unsigned char *buf; 31602650d71eSChristoph Hellwig const unsigned char *initiator_str; 316113ba564cSJulia Lawall char *iport_ptr = NULL, i_buf[PR_REG_ISID_ID_LEN]; 3162c66ac9dbSNicholas Bellinger u32 tid_len, tmp_tid_len; 3163d2843c17SAndy Grover int new_reg = 0, type, scope, matching_iname; 3164de103c93SChristoph Hellwig sense_reason_t ret; 3165c66ac9dbSNicholas Bellinger unsigned short rtpi; 3166c66ac9dbSNicholas Bellinger unsigned char proto_ident; 3167c66ac9dbSNicholas Bellinger 31686708bb27SAndy Grover if (!se_sess || !se_lun) { 31696708bb27SAndy Grover pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); 3170de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3171c66ac9dbSNicholas Bellinger } 3172de103c93SChristoph Hellwig 3173c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 3174c66ac9dbSNicholas Bellinger se_tpg = se_sess->se_tpg; 3175e3d6f909SAndy Grover tf_ops = se_tpg->se_tpg_tfo; 3176c66ac9dbSNicholas Bellinger /* 3177c66ac9dbSNicholas Bellinger * Follow logic from spc4r17 Section 5.7.8, Table 50 -- 3178c66ac9dbSNicholas Bellinger * Register behaviors for a REGISTER AND MOVE service action 3179c66ac9dbSNicholas Bellinger * 3180c66ac9dbSNicholas Bellinger * Locate the existing *pr_reg via struct se_node_acl pointers 3181c66ac9dbSNicholas Bellinger */ 31825951146dSAndy Grover pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, 3183c66ac9dbSNicholas Bellinger se_sess); 31846708bb27SAndy Grover if (!pr_reg) { 31856708bb27SAndy Grover pr_err("SPC-3 PR: Unable to locate PR_REGISTERED" 3186c66ac9dbSNicholas Bellinger " *pr_reg for REGISTER_AND_MOVE\n"); 3187de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3188c66ac9dbSNicholas Bellinger } 3189c66ac9dbSNicholas Bellinger /* 3190c66ac9dbSNicholas Bellinger * The provided reservation key much match the existing reservation key 3191c66ac9dbSNicholas Bellinger * provided during this initiator's I_T nexus registration. 3192c66ac9dbSNicholas Bellinger */ 3193c66ac9dbSNicholas Bellinger if (res_key != pr_reg->pr_res_key) { 31946708bb27SAndy Grover pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received" 3195c66ac9dbSNicholas Bellinger " res_key: 0x%016Lx does not match existing SA REGISTER" 3196c66ac9dbSNicholas Bellinger " res_key: 0x%016Lx\n", res_key, pr_reg->pr_res_key); 3197de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 3198de103c93SChristoph Hellwig goto out_put_pr_reg; 3199c66ac9dbSNicholas Bellinger } 3200c66ac9dbSNicholas Bellinger /* 3201c66ac9dbSNicholas Bellinger * The service active reservation key needs to be non zero 3202c66ac9dbSNicholas Bellinger */ 32036708bb27SAndy Grover if (!sa_res_key) { 32046708bb27SAndy Grover pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received zero" 3205c66ac9dbSNicholas Bellinger " sa_res_key\n"); 3206de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3207de103c93SChristoph Hellwig goto out_put_pr_reg; 3208c66ac9dbSNicholas Bellinger } 320905d1c7c0SAndy Grover 3210c66ac9dbSNicholas Bellinger /* 3211c66ac9dbSNicholas Bellinger * Determine the Relative Target Port Identifier where the reservation 3212c66ac9dbSNicholas Bellinger * will be moved to for the TransportID containing SCSI initiator WWN 3213c66ac9dbSNicholas Bellinger * information. 3214c66ac9dbSNicholas Bellinger */ 32154949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3216de103c93SChristoph Hellwig if (!buf) { 3217de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3218de103c93SChristoph Hellwig goto out_put_pr_reg; 3219de103c93SChristoph Hellwig } 3220de103c93SChristoph Hellwig 3221a85d667eSBart Van Assche rtpi = get_unaligned_be16(&buf[18]); 3222a85d667eSBart Van Assche tid_len = get_unaligned_be32(&buf[20]); 32234949314cSAndy Grover transport_kunmap_data_sg(cmd); 322405d1c7c0SAndy Grover buf = NULL; 3225c66ac9dbSNicholas Bellinger 3226c66ac9dbSNicholas Bellinger if ((tid_len + 24) != cmd->data_length) { 32276708bb27SAndy Grover pr_err("SPC-3 PR: Illegal tid_len: %u + 24 byte header" 3228c66ac9dbSNicholas Bellinger " does not equal CDB data_length: %u\n", tid_len, 3229c66ac9dbSNicholas Bellinger cmd->data_length); 3230de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3231de103c93SChristoph Hellwig goto out_put_pr_reg; 3232c66ac9dbSNicholas Bellinger } 3233c66ac9dbSNicholas Bellinger 3234c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 3235adf653f9SChristoph Hellwig list_for_each_entry(tmp_lun, &dev->dev_sep_list, lun_dev_link) { 3236adf653f9SChristoph Hellwig if (tmp_lun->lun_rtpi != rtpi) 3237c66ac9dbSNicholas Bellinger continue; 3238adf653f9SChristoph Hellwig dest_se_tpg = tmp_lun->lun_tpg; 3239e3d6f909SAndy Grover dest_tf_ops = dest_se_tpg->se_tpg_tfo; 32406708bb27SAndy Grover if (!dest_tf_ops) 3241c66ac9dbSNicholas Bellinger continue; 3242c66ac9dbSNicholas Bellinger 324333940d09SJoern Engel atomic_inc_mb(&dest_se_tpg->tpg_pr_ref_count); 3244c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 3245c66ac9dbSNicholas Bellinger 3246de103c93SChristoph Hellwig if (core_scsi3_tpg_depend_item(dest_se_tpg)) { 32476708bb27SAndy Grover pr_err("core_scsi3_tpg_depend_item() failed" 3248c66ac9dbSNicholas Bellinger " for dest_se_tpg\n"); 324933940d09SJoern Engel atomic_dec_mb(&dest_se_tpg->tpg_pr_ref_count); 3250de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3251de103c93SChristoph Hellwig goto out_put_pr_reg; 3252c66ac9dbSNicholas Bellinger } 3253c66ac9dbSNicholas Bellinger 3254c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 3255c66ac9dbSNicholas Bellinger break; 3256c66ac9dbSNicholas Bellinger } 3257c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 3258c66ac9dbSNicholas Bellinger 32596708bb27SAndy Grover if (!dest_se_tpg || !dest_tf_ops) { 32606708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate" 3261c66ac9dbSNicholas Bellinger " fabric ops from Relative Target Port Identifier:" 3262c66ac9dbSNicholas Bellinger " %hu\n", rtpi); 3263de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3264de103c93SChristoph Hellwig goto out_put_pr_reg; 3265c66ac9dbSNicholas Bellinger } 326605d1c7c0SAndy Grover 32674949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3268de103c93SChristoph Hellwig if (!buf) { 3269de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3270de103c93SChristoph Hellwig goto out_put_pr_reg; 3271de103c93SChristoph Hellwig } 3272c66ac9dbSNicholas Bellinger proto_ident = (buf[24] & 0x0f); 32738b1e1244SAndy Grover 32746708bb27SAndy Grover pr_debug("SPC-3 PR REGISTER_AND_MOVE: Extracted Protocol Identifier:" 3275c66ac9dbSNicholas Bellinger " 0x%02x\n", proto_ident); 32768b1e1244SAndy Grover 32772aeeafaeSChristoph Hellwig if (proto_ident != dest_se_tpg->proto_id) { 32786708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: Received" 3279c66ac9dbSNicholas Bellinger " proto_ident: 0x%02x does not match ident: 0x%02x" 3280c66ac9dbSNicholas Bellinger " from fabric: %s\n", proto_ident, 32812aeeafaeSChristoph Hellwig dest_se_tpg->proto_id, 3282c66ac9dbSNicholas Bellinger dest_tf_ops->get_fabric_name()); 3283de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3284c66ac9dbSNicholas Bellinger goto out; 3285c66ac9dbSNicholas Bellinger } 32862650d71eSChristoph Hellwig initiator_str = target_parse_pr_out_transport_id(dest_se_tpg, 3287c66ac9dbSNicholas Bellinger (const char *)&buf[24], &tmp_tid_len, &iport_ptr); 32886708bb27SAndy Grover if (!initiator_str) { 32896708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate" 3290c66ac9dbSNicholas Bellinger " initiator_str from Transport ID\n"); 3291de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3292c66ac9dbSNicholas Bellinger goto out; 3293c66ac9dbSNicholas Bellinger } 3294c66ac9dbSNicholas Bellinger 32954949314cSAndy Grover transport_kunmap_data_sg(cmd); 329605d1c7c0SAndy Grover buf = NULL; 329705d1c7c0SAndy Grover 32986708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Extracted initiator %s identifier: %s" 3299c66ac9dbSNicholas Bellinger " %s\n", dest_tf_ops->get_fabric_name(), (iport_ptr != NULL) ? 3300c66ac9dbSNicholas Bellinger "port" : "device", initiator_str, (iport_ptr != NULL) ? 3301c66ac9dbSNicholas Bellinger iport_ptr : ""); 3302c66ac9dbSNicholas Bellinger /* 3303c66ac9dbSNicholas Bellinger * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service 3304c66ac9dbSNicholas Bellinger * action specifies a TransportID that is the same as the initiator port 3305c66ac9dbSNicholas Bellinger * of the I_T nexus for the command received, then the command shall 3306c66ac9dbSNicholas Bellinger * be terminated with CHECK CONDITION status, with the sense key set to 3307c66ac9dbSNicholas Bellinger * ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD 3308c66ac9dbSNicholas Bellinger * IN PARAMETER LIST. 3309c66ac9dbSNicholas Bellinger */ 3310c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 3311c66ac9dbSNicholas Bellinger matching_iname = (!strcmp(initiator_str, 3312c66ac9dbSNicholas Bellinger pr_reg_nacl->initiatorname)) ? 1 : 0; 33136708bb27SAndy Grover if (!matching_iname) 3314c66ac9dbSNicholas Bellinger goto after_iport_check; 3315c66ac9dbSNicholas Bellinger 33166708bb27SAndy Grover if (!iport_ptr || !pr_reg->isid_present_at_reg) { 33176708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s" 3318c66ac9dbSNicholas Bellinger " matches: %s on received I_T Nexus\n", initiator_str, 3319c66ac9dbSNicholas Bellinger pr_reg_nacl->initiatorname); 3320de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3321c66ac9dbSNicholas Bellinger goto out; 3322c66ac9dbSNicholas Bellinger } 33236708bb27SAndy Grover if (!strcmp(iport_ptr, pr_reg->pr_reg_isid)) { 33246708bb27SAndy Grover pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s %s" 3325c66ac9dbSNicholas Bellinger " matches: %s %s on received I_T Nexus\n", 3326c66ac9dbSNicholas Bellinger initiator_str, iport_ptr, pr_reg_nacl->initiatorname, 3327c66ac9dbSNicholas Bellinger pr_reg->pr_reg_isid); 3328de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3329c66ac9dbSNicholas Bellinger goto out; 3330c66ac9dbSNicholas Bellinger } 3331c66ac9dbSNicholas Bellinger after_iport_check: 3332c66ac9dbSNicholas Bellinger /* 3333c66ac9dbSNicholas Bellinger * Locate the destination struct se_node_acl from the received Transport ID 3334c66ac9dbSNicholas Bellinger */ 3335403edd78SNicholas Bellinger mutex_lock(&dest_se_tpg->acl_node_mutex); 3336c66ac9dbSNicholas Bellinger dest_node_acl = __core_tpg_get_initiator_node_acl(dest_se_tpg, 3337c66ac9dbSNicholas Bellinger initiator_str); 333833940d09SJoern Engel if (dest_node_acl) 333933940d09SJoern Engel atomic_inc_mb(&dest_node_acl->acl_pr_ref_count); 3340403edd78SNicholas Bellinger mutex_unlock(&dest_se_tpg->acl_node_mutex); 3341c66ac9dbSNicholas Bellinger 33426708bb27SAndy Grover if (!dest_node_acl) { 33436708bb27SAndy Grover pr_err("Unable to locate %s dest_node_acl for" 3344c66ac9dbSNicholas Bellinger " TransportID%s\n", dest_tf_ops->get_fabric_name(), 3345c66ac9dbSNicholas Bellinger initiator_str); 3346de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3347c66ac9dbSNicholas Bellinger goto out; 3348c66ac9dbSNicholas Bellinger } 3349de103c93SChristoph Hellwig 3350de103c93SChristoph Hellwig if (core_scsi3_nodeacl_depend_item(dest_node_acl)) { 33516708bb27SAndy Grover pr_err("core_scsi3_nodeacl_depend_item() for" 3352c66ac9dbSNicholas Bellinger " dest_node_acl\n"); 335333940d09SJoern Engel atomic_dec_mb(&dest_node_acl->acl_pr_ref_count); 3354c66ac9dbSNicholas Bellinger dest_node_acl = NULL; 3355de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3356c66ac9dbSNicholas Bellinger goto out; 3357c66ac9dbSNicholas Bellinger } 33588b1e1244SAndy Grover 33596708bb27SAndy Grover pr_debug("SPC-3 PR REGISTER_AND_MOVE: Found %s dest_node_acl:" 3360c66ac9dbSNicholas Bellinger " %s from TransportID\n", dest_tf_ops->get_fabric_name(), 3361c66ac9dbSNicholas Bellinger dest_node_acl->initiatorname); 33628b1e1244SAndy Grover 3363c66ac9dbSNicholas Bellinger /* 3364c66ac9dbSNicholas Bellinger * Locate the struct se_dev_entry pointer for the matching RELATIVE TARGET 3365c66ac9dbSNicholas Bellinger * PORT IDENTIFIER. 3366c66ac9dbSNicholas Bellinger */ 3367c66ac9dbSNicholas Bellinger dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, rtpi); 33686708bb27SAndy Grover if (!dest_se_deve) { 33696708bb27SAndy Grover pr_err("Unable to locate %s dest_se_deve from RTPI:" 3370c66ac9dbSNicholas Bellinger " %hu\n", dest_tf_ops->get_fabric_name(), rtpi); 3371de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3372c66ac9dbSNicholas Bellinger goto out; 3373c66ac9dbSNicholas Bellinger } 3374c66ac9dbSNicholas Bellinger 3375de103c93SChristoph Hellwig if (core_scsi3_lunacl_depend_item(dest_se_deve)) { 33766708bb27SAndy Grover pr_err("core_scsi3_lunacl_depend_item() failed\n"); 337729a05deeSNicholas Bellinger kref_put(&dest_se_deve->pr_kref, target_pr_kref_release); 3378c66ac9dbSNicholas Bellinger dest_se_deve = NULL; 3379de103c93SChristoph Hellwig ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3380c66ac9dbSNicholas Bellinger goto out; 3381c66ac9dbSNicholas Bellinger } 33828b1e1244SAndy Grover 33836708bb27SAndy Grover pr_debug("SPC-3 PR REGISTER_AND_MOVE: Located %s node %s LUN" 3384f2d30680SHannes Reinecke " ACL for dest_se_deve->mapped_lun: %llu\n", 3385c66ac9dbSNicholas Bellinger dest_tf_ops->get_fabric_name(), dest_node_acl->initiatorname, 3386c66ac9dbSNicholas Bellinger dest_se_deve->mapped_lun); 33878b1e1244SAndy Grover 3388c66ac9dbSNicholas Bellinger /* 3389c66ac9dbSNicholas Bellinger * A persistent reservation needs to already existing in order to 3390c66ac9dbSNicholas Bellinger * successfully complete the REGISTER_AND_MOVE service action.. 3391c66ac9dbSNicholas Bellinger */ 3392c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 3393c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 33946708bb27SAndy Grover if (!pr_res_holder) { 33956708bb27SAndy Grover pr_warn("SPC-3 PR REGISTER_AND_MOVE: No reservation" 3396c66ac9dbSNicholas Bellinger " currently held\n"); 3397c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3398de103c93SChristoph Hellwig ret = TCM_INVALID_CDB_FIELD; 3399c66ac9dbSNicholas Bellinger goto out; 3400c66ac9dbSNicholas Bellinger } 3401c66ac9dbSNicholas Bellinger /* 3402c66ac9dbSNicholas Bellinger * The received on I_T Nexus must be the reservation holder. 3403c66ac9dbSNicholas Bellinger * 3404c66ac9dbSNicholas Bellinger * From spc4r17 section 5.7.8 Table 50 -- 3405c66ac9dbSNicholas Bellinger * Register behaviors for a REGISTER AND MOVE service action 3406c66ac9dbSNicholas Bellinger */ 3407e673dc92SIlias Tsitsimpis if (!is_reservation_holder(pr_res_holder, pr_reg)) { 34086708bb27SAndy Grover pr_warn("SPC-3 PR REGISTER_AND_MOVE: Calling I_T" 3409c66ac9dbSNicholas Bellinger " Nexus is not reservation holder\n"); 3410c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3411de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 3412c66ac9dbSNicholas Bellinger goto out; 3413c66ac9dbSNicholas Bellinger } 3414c66ac9dbSNicholas Bellinger /* 3415c66ac9dbSNicholas Bellinger * From spc4r17 section 5.7.8: registering and moving reservation 3416c66ac9dbSNicholas Bellinger * 3417c66ac9dbSNicholas Bellinger * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service 3418c66ac9dbSNicholas Bellinger * action is received and the established persistent reservation is a 3419c66ac9dbSNicholas Bellinger * Write Exclusive - All Registrants type or Exclusive Access - 3420c66ac9dbSNicholas Bellinger * All Registrants type reservation, then the command shall be completed 3421c66ac9dbSNicholas Bellinger * with RESERVATION CONFLICT status. 3422c66ac9dbSNicholas Bellinger */ 3423c66ac9dbSNicholas Bellinger if ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 3424c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { 34256708bb27SAndy Grover pr_warn("SPC-3 PR REGISTER_AND_MOVE: Unable to move" 3426c66ac9dbSNicholas Bellinger " reservation for type: %s\n", 3427c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_res_holder->pr_res_type)); 3428c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3429de103c93SChristoph Hellwig ret = TCM_RESERVATION_CONFLICT; 3430c66ac9dbSNicholas Bellinger goto out; 3431c66ac9dbSNicholas Bellinger } 3432c66ac9dbSNicholas Bellinger pr_res_nacl = pr_res_holder->pr_reg_nacl; 3433c66ac9dbSNicholas Bellinger /* 3434c66ac9dbSNicholas Bellinger * b) Ignore the contents of the (received) SCOPE and TYPE fields; 3435c66ac9dbSNicholas Bellinger */ 3436c66ac9dbSNicholas Bellinger type = pr_res_holder->pr_res_type; 3437c66ac9dbSNicholas Bellinger scope = pr_res_holder->pr_res_type; 3438c66ac9dbSNicholas Bellinger /* 3439c66ac9dbSNicholas Bellinger * c) Associate the reservation key specified in the SERVICE ACTION 3440c66ac9dbSNicholas Bellinger * RESERVATION KEY field with the I_T nexus specified as the 3441c66ac9dbSNicholas Bellinger * destination of the register and move, where: 3442c66ac9dbSNicholas Bellinger * A) The I_T nexus is specified by the TransportID and the 3443c66ac9dbSNicholas Bellinger * RELATIVE TARGET PORT IDENTIFIER field (see 6.14.4); and 3444c66ac9dbSNicholas Bellinger * B) Regardless of the TransportID format used, the association for 3445c66ac9dbSNicholas Bellinger * the initiator port is based on either the initiator port name 3446c66ac9dbSNicholas Bellinger * (see 3.1.71) on SCSI transport protocols where port names are 3447c66ac9dbSNicholas Bellinger * required or the initiator port identifier (see 3.1.70) on SCSI 3448c66ac9dbSNicholas Bellinger * transport protocols where port names are not required; 3449c66ac9dbSNicholas Bellinger * d) Register the reservation key specified in the SERVICE ACTION 3450c66ac9dbSNicholas Bellinger * RESERVATION KEY field; 3451c66ac9dbSNicholas Bellinger * e) Retain the reservation key specified in the SERVICE ACTION 3452c66ac9dbSNicholas Bellinger * RESERVATION KEY field and associated information; 3453c66ac9dbSNicholas Bellinger * 3454c66ac9dbSNicholas Bellinger * Also, It is not an error for a REGISTER AND MOVE service action to 3455c66ac9dbSNicholas Bellinger * register an I_T nexus that is already registered with the same 3456c66ac9dbSNicholas Bellinger * reservation key or a different reservation key. 3457c66ac9dbSNicholas Bellinger */ 3458c66ac9dbSNicholas Bellinger dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl, 3459c66ac9dbSNicholas Bellinger iport_ptr); 34606708bb27SAndy Grover if (!dest_pr_reg) { 346179dc9c9eSNicholas Bellinger struct se_lun *dest_lun = rcu_dereference_check(dest_se_deve->se_lun, 34622c935bc5SPeter Zijlstra kref_read(&dest_se_deve->pr_kref) != 0); 346379dc9c9eSNicholas Bellinger 3464c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 346579dc9c9eSNicholas Bellinger if (core_scsi3_alloc_registration(cmd->se_dev, dest_node_acl, 346679dc9c9eSNicholas Bellinger dest_lun, dest_se_deve, dest_se_deve->mapped_lun, 346779dc9c9eSNicholas Bellinger iport_ptr, sa_res_key, 0, aptpl, 2, 1)) { 3468de103c93SChristoph Hellwig ret = TCM_INVALID_PARAMETER_LIST; 3469c66ac9dbSNicholas Bellinger goto out; 3470c66ac9dbSNicholas Bellinger } 347180bfdfa9SNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 3472c66ac9dbSNicholas Bellinger dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl, 3473c66ac9dbSNicholas Bellinger iport_ptr); 3474c66ac9dbSNicholas Bellinger new_reg = 1; 3475c66ac9dbSNicholas Bellinger } 3476c66ac9dbSNicholas Bellinger /* 3477c66ac9dbSNicholas Bellinger * f) Release the persistent reservation for the persistent reservation 3478c66ac9dbSNicholas Bellinger * holder (i.e., the I_T nexus on which the 3479c66ac9dbSNicholas Bellinger */ 3480c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, pr_res_nacl, 34816c3c9baaSNicholas Bellinger dev->dev_pr_res_holder, 0, 0); 3482c66ac9dbSNicholas Bellinger /* 3483c66ac9dbSNicholas Bellinger * g) Move the persistent reservation to the specified I_T nexus using 3484c66ac9dbSNicholas Bellinger * the same scope and type as the persistent reservation released in 3485c66ac9dbSNicholas Bellinger * item f); and 3486c66ac9dbSNicholas Bellinger */ 3487c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = dest_pr_reg; 3488c66ac9dbSNicholas Bellinger dest_pr_reg->pr_res_holder = 1; 3489c66ac9dbSNicholas Bellinger dest_pr_reg->pr_res_type = type; 3490c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope = scope; 3491d2843c17SAndy Grover core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 3492c66ac9dbSNicholas Bellinger /* 3493c66ac9dbSNicholas Bellinger * Increment PRGeneration for existing registrations.. 3494c66ac9dbSNicholas Bellinger */ 34956708bb27SAndy Grover if (!new_reg) 3496c66ac9dbSNicholas Bellinger dest_pr_reg->pr_res_generation = pr_tmpl->pr_generation++; 3497c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3498c66ac9dbSNicholas Bellinger 34996708bb27SAndy Grover pr_debug("SPC-3 PR [%s] Service Action: REGISTER_AND_MOVE" 3500c66ac9dbSNicholas Bellinger " created new reservation holder TYPE: %s on object RTPI:" 3501c66ac9dbSNicholas Bellinger " %hu PRGeneration: 0x%08x\n", dest_tf_ops->get_fabric_name(), 3502c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(type), rtpi, 3503c66ac9dbSNicholas Bellinger dest_pr_reg->pr_res_generation); 35046708bb27SAndy Grover pr_debug("SPC-3 PR Successfully moved reservation from" 3505c66ac9dbSNicholas Bellinger " %s Fabric Node: %s%s -> %s Fabric Node: %s %s\n", 3506c66ac9dbSNicholas Bellinger tf_ops->get_fabric_name(), pr_reg_nacl->initiatorname, 3507d2843c17SAndy Grover i_buf, dest_tf_ops->get_fabric_name(), 3508c66ac9dbSNicholas Bellinger dest_node_acl->initiatorname, (iport_ptr != NULL) ? 3509c66ac9dbSNicholas Bellinger iport_ptr : ""); 3510c66ac9dbSNicholas Bellinger /* 3511c66ac9dbSNicholas Bellinger * It is now safe to release configfs group dependencies for destination 3512c66ac9dbSNicholas Bellinger * of Transport ID Initiator Device/Port Identifier 3513c66ac9dbSNicholas Bellinger */ 3514c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 3515c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 3516c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_se_tpg); 3517c66ac9dbSNicholas Bellinger /* 3518c66ac9dbSNicholas Bellinger * h) If the UNREG bit is set to one, unregister (see 5.7.11.3) the I_T 3519c66ac9dbSNicholas Bellinger * nexus on which PERSISTENT RESERVE OUT command was received. 3520c66ac9dbSNicholas Bellinger */ 3521c66ac9dbSNicholas Bellinger if (unreg) { 3522c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 3523c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, NULL, 1); 3524c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 3525c66ac9dbSNicholas Bellinger } else 3526c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 3527c66ac9dbSNicholas Bellinger 3528459f213bSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, aptpl); 3529c66ac9dbSNicholas Bellinger 35304949314cSAndy Grover transport_kunmap_data_sg(cmd); 353105d1c7c0SAndy Grover 3532c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(dest_pr_reg); 3533c66ac9dbSNicholas Bellinger return 0; 3534c66ac9dbSNicholas Bellinger out: 353505d1c7c0SAndy Grover if (buf) 35364949314cSAndy Grover transport_kunmap_data_sg(cmd); 3537c66ac9dbSNicholas Bellinger if (dest_se_deve) 3538c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 3539c66ac9dbSNicholas Bellinger if (dest_node_acl) 3540c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 3541c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_se_tpg); 3542de103c93SChristoph Hellwig 3543de103c93SChristoph Hellwig out_put_pr_reg: 3544c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 3545c66ac9dbSNicholas Bellinger return ret; 3546c66ac9dbSNicholas Bellinger } 3547c66ac9dbSNicholas Bellinger 3548c66ac9dbSNicholas Bellinger /* 3549c66ac9dbSNicholas Bellinger * See spc4r17 section 6.14 Table 170 3550c66ac9dbSNicholas Bellinger */ 3551de103c93SChristoph Hellwig sense_reason_t 3552de103c93SChristoph Hellwig target_scsi3_emulate_pr_out(struct se_cmd *cmd) 3553c66ac9dbSNicholas Bellinger { 355492404e60SNicholas Bellinger struct se_device *dev = cmd->se_dev; 3555617c0e06SChristoph Hellwig unsigned char *cdb = &cmd->t_task_cdb[0]; 355605d1c7c0SAndy Grover unsigned char *buf; 3557c66ac9dbSNicholas Bellinger u64 res_key, sa_res_key; 3558c66ac9dbSNicholas Bellinger int sa, scope, type, aptpl; 3559c66ac9dbSNicholas Bellinger int spec_i_pt = 0, all_tg_pt = 0, unreg = 0; 3560de103c93SChristoph Hellwig sense_reason_t ret; 3561617c0e06SChristoph Hellwig 3562617c0e06SChristoph Hellwig /* 3563617c0e06SChristoph Hellwig * Following spc2r20 5.5.1 Reservations overview: 3564617c0e06SChristoph Hellwig * 3565617c0e06SChristoph Hellwig * If a logical unit has been reserved by any RESERVE command and is 3566617c0e06SChristoph Hellwig * still reserved by any initiator, all PERSISTENT RESERVE IN and all 3567617c0e06SChristoph Hellwig * PERSISTENT RESERVE OUT commands shall conflict regardless of 3568617c0e06SChristoph Hellwig * initiator or service action and shall terminate with a RESERVATION 3569617c0e06SChristoph Hellwig * CONFLICT status. 3570617c0e06SChristoph Hellwig */ 35710fd97ccfSChristoph Hellwig if (cmd->se_dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) { 3572617c0e06SChristoph Hellwig pr_err("Received PERSISTENT_RESERVE CDB while legacy" 3573617c0e06SChristoph Hellwig " SPC-2 reservation is held, returning" 3574617c0e06SChristoph Hellwig " RESERVATION_CONFLICT\n"); 3575de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 3576617c0e06SChristoph Hellwig } 3577617c0e06SChristoph Hellwig 3578c66ac9dbSNicholas Bellinger /* 3579c66ac9dbSNicholas Bellinger * FIXME: A NULL struct se_session pointer means an this is not coming from 3580c66ac9dbSNicholas Bellinger * a $FABRIC_MOD's nexus, but from internal passthrough ops. 3581c66ac9dbSNicholas Bellinger */ 3582de103c93SChristoph Hellwig if (!cmd->se_sess) 3583de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3584c66ac9dbSNicholas Bellinger 3585c66ac9dbSNicholas Bellinger if (cmd->data_length < 24) { 35866708bb27SAndy Grover pr_warn("SPC-PR: Received PR OUT parameter list" 3587c66ac9dbSNicholas Bellinger " length too small: %u\n", cmd->data_length); 3588de103c93SChristoph Hellwig return TCM_INVALID_PARAMETER_LIST; 3589c66ac9dbSNicholas Bellinger } 3590de103c93SChristoph Hellwig 3591c66ac9dbSNicholas Bellinger /* 3592c66ac9dbSNicholas Bellinger * From the PERSISTENT_RESERVE_OUT command descriptor block (CDB) 3593c66ac9dbSNicholas Bellinger */ 3594c66ac9dbSNicholas Bellinger sa = (cdb[1] & 0x1f); 3595c66ac9dbSNicholas Bellinger scope = (cdb[2] & 0xf0); 3596c66ac9dbSNicholas Bellinger type = (cdb[2] & 0x0f); 359705d1c7c0SAndy Grover 35984949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3599de103c93SChristoph Hellwig if (!buf) 3600de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3601de103c93SChristoph Hellwig 3602c66ac9dbSNicholas Bellinger /* 3603c66ac9dbSNicholas Bellinger * From PERSISTENT_RESERVE_OUT parameter list (payload) 3604c66ac9dbSNicholas Bellinger */ 3605a85d667eSBart Van Assche res_key = get_unaligned_be64(&buf[0]); 3606a85d667eSBart Van Assche sa_res_key = get_unaligned_be64(&buf[8]); 3607c66ac9dbSNicholas Bellinger /* 3608c66ac9dbSNicholas Bellinger * REGISTER_AND_MOVE uses a different SA parameter list containing 3609c66ac9dbSNicholas Bellinger * SCSI TransportIDs. 3610c66ac9dbSNicholas Bellinger */ 3611c66ac9dbSNicholas Bellinger if (sa != PRO_REGISTER_AND_MOVE) { 3612c66ac9dbSNicholas Bellinger spec_i_pt = (buf[20] & 0x08); 3613c66ac9dbSNicholas Bellinger all_tg_pt = (buf[20] & 0x04); 3614c66ac9dbSNicholas Bellinger aptpl = (buf[20] & 0x01); 3615c66ac9dbSNicholas Bellinger } else { 3616c66ac9dbSNicholas Bellinger aptpl = (buf[17] & 0x01); 3617c66ac9dbSNicholas Bellinger unreg = (buf[17] & 0x02); 3618c66ac9dbSNicholas Bellinger } 361992404e60SNicholas Bellinger /* 362092404e60SNicholas Bellinger * If the backend device has been configured to force APTPL metadata 362192404e60SNicholas Bellinger * write-out, go ahead and propigate aptpl=1 down now. 362292404e60SNicholas Bellinger */ 362392404e60SNicholas Bellinger if (dev->dev_attrib.force_pr_aptpl) 362492404e60SNicholas Bellinger aptpl = 1; 362592404e60SNicholas Bellinger 36264949314cSAndy Grover transport_kunmap_data_sg(cmd); 362705d1c7c0SAndy Grover buf = NULL; 362805d1c7c0SAndy Grover 3629c66ac9dbSNicholas Bellinger /* 3630c66ac9dbSNicholas Bellinger * SPEC_I_PT=1 is only valid for Service action: REGISTER 3631c66ac9dbSNicholas Bellinger */ 3632de103c93SChristoph Hellwig if (spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER)) 3633de103c93SChristoph Hellwig return TCM_INVALID_PARAMETER_LIST; 3634d29a5b6aSChristoph Hellwig 3635c66ac9dbSNicholas Bellinger /* 3636c66ac9dbSNicholas Bellinger * From spc4r17 section 6.14: 3637c66ac9dbSNicholas Bellinger * 3638c66ac9dbSNicholas Bellinger * If the SPEC_I_PT bit is set to zero, the service action is not 3639c66ac9dbSNicholas Bellinger * REGISTER AND MOVE, and the parameter list length is not 24, then 3640c66ac9dbSNicholas Bellinger * the command shall be terminated with CHECK CONDITION status, with 3641c66ac9dbSNicholas Bellinger * the sense key set to ILLEGAL REQUEST, and the additional sense 3642c66ac9dbSNicholas Bellinger * code set to PARAMETER LIST LENGTH ERROR. 3643c66ac9dbSNicholas Bellinger */ 36446708bb27SAndy Grover if (!spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER_AND_MOVE) && 3645c66ac9dbSNicholas Bellinger (cmd->data_length != 24)) { 36466708bb27SAndy Grover pr_warn("SPC-PR: Received PR OUT illegal parameter" 3647c66ac9dbSNicholas Bellinger " list length: %u\n", cmd->data_length); 3648de103c93SChristoph Hellwig return TCM_INVALID_PARAMETER_LIST; 3649c66ac9dbSNicholas Bellinger } 3650de103c93SChristoph Hellwig 3651c66ac9dbSNicholas Bellinger /* 3652c66ac9dbSNicholas Bellinger * (core_scsi3_emulate_pro_* function parameters 3653c66ac9dbSNicholas Bellinger * are defined by spc4r17 Table 174: 3654c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_OUT service actions and valid parameters. 3655c66ac9dbSNicholas Bellinger */ 3656c66ac9dbSNicholas Bellinger switch (sa) { 3657c66ac9dbSNicholas Bellinger case PRO_REGISTER: 3658d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_register(cmd, 365933ce6a87SAndy Grover res_key, sa_res_key, aptpl, all_tg_pt, spec_i_pt, REGISTER); 3660d29a5b6aSChristoph Hellwig break; 3661c66ac9dbSNicholas Bellinger case PRO_RESERVE: 3662d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_reserve(cmd, type, scope, res_key); 3663d29a5b6aSChristoph Hellwig break; 3664c66ac9dbSNicholas Bellinger case PRO_RELEASE: 3665d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_release(cmd, type, scope, res_key); 3666d29a5b6aSChristoph Hellwig break; 3667c66ac9dbSNicholas Bellinger case PRO_CLEAR: 3668d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_clear(cmd, res_key); 3669d29a5b6aSChristoph Hellwig break; 3670c66ac9dbSNicholas Bellinger case PRO_PREEMPT: 3671d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_preempt(cmd, type, scope, 367233ce6a87SAndy Grover res_key, sa_res_key, PREEMPT); 3673d29a5b6aSChristoph Hellwig break; 3674c66ac9dbSNicholas Bellinger case PRO_PREEMPT_AND_ABORT: 3675d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_preempt(cmd, type, scope, 367633ce6a87SAndy Grover res_key, sa_res_key, PREEMPT_AND_ABORT); 3677d29a5b6aSChristoph Hellwig break; 3678c66ac9dbSNicholas Bellinger case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: 3679d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_register(cmd, 368033ce6a87SAndy Grover 0, sa_res_key, aptpl, all_tg_pt, spec_i_pt, REGISTER_AND_IGNORE_EXISTING_KEY); 3681d29a5b6aSChristoph Hellwig break; 3682c66ac9dbSNicholas Bellinger case PRO_REGISTER_AND_MOVE: 3683d29a5b6aSChristoph Hellwig ret = core_scsi3_emulate_pro_register_and_move(cmd, res_key, 3684c66ac9dbSNicholas Bellinger sa_res_key, aptpl, unreg); 3685d29a5b6aSChristoph Hellwig break; 3686c66ac9dbSNicholas Bellinger default: 36876708bb27SAndy Grover pr_err("Unknown PERSISTENT_RESERVE_OUT service" 3688c66ac9dbSNicholas Bellinger " action: 0x%02x\n", cdb[1] & 0x1f); 3689de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 3690c66ac9dbSNicholas Bellinger } 3691c66ac9dbSNicholas Bellinger 36926bb35e00SChristoph Hellwig if (!ret) 36936bb35e00SChristoph Hellwig target_complete_cmd(cmd, GOOD); 3694d29a5b6aSChristoph Hellwig return ret; 3695c66ac9dbSNicholas Bellinger } 3696c66ac9dbSNicholas Bellinger 3697c66ac9dbSNicholas Bellinger /* 3698c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_IN Service Action READ_KEYS 3699c66ac9dbSNicholas Bellinger * 3700c66ac9dbSNicholas Bellinger * See spc4r17 section 5.7.6.2 and section 6.13.2, Table 160 3701c66ac9dbSNicholas Bellinger */ 3702de103c93SChristoph Hellwig static sense_reason_t 3703de103c93SChristoph Hellwig core_scsi3_pri_read_keys(struct se_cmd *cmd) 3704c66ac9dbSNicholas Bellinger { 37050fd97ccfSChristoph Hellwig struct se_device *dev = cmd->se_dev; 3706c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 370705d1c7c0SAndy Grover unsigned char *buf; 3708c66ac9dbSNicholas Bellinger u32 add_len = 0, off = 8; 3709c66ac9dbSNicholas Bellinger 3710c66ac9dbSNicholas Bellinger if (cmd->data_length < 8) { 37116708bb27SAndy Grover pr_err("PRIN SA READ_KEYS SCSI Data Length: %u" 3712c66ac9dbSNicholas Bellinger " too small\n", cmd->data_length); 3713de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 3714c66ac9dbSNicholas Bellinger } 3715c66ac9dbSNicholas Bellinger 37164949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3717de103c93SChristoph Hellwig if (!buf) 3718de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3719de103c93SChristoph Hellwig 3720a85d667eSBart Van Assche put_unaligned_be32(dev->t10_pr.pr_generation, buf); 3721c66ac9dbSNicholas Bellinger 37220fd97ccfSChristoph Hellwig spin_lock(&dev->t10_pr.registration_lock); 37230fd97ccfSChristoph Hellwig list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 3724c66ac9dbSNicholas Bellinger pr_reg_list) { 3725c66ac9dbSNicholas Bellinger /* 3726c66ac9dbSNicholas Bellinger * Check for overflow of 8byte PRI READ_KEYS payload and 3727c66ac9dbSNicholas Bellinger * next reservation key list descriptor. 3728c66ac9dbSNicholas Bellinger */ 3729c66ac9dbSNicholas Bellinger if ((add_len + 8) > (cmd->data_length - 8)) 3730c66ac9dbSNicholas Bellinger break; 3731c66ac9dbSNicholas Bellinger 3732a85d667eSBart Van Assche put_unaligned_be64(pr_reg->pr_res_key, &buf[off]); 3733a85d667eSBart Van Assche off += 8; 3734c66ac9dbSNicholas Bellinger add_len += 8; 3735c66ac9dbSNicholas Bellinger } 37360fd97ccfSChristoph Hellwig spin_unlock(&dev->t10_pr.registration_lock); 3737c66ac9dbSNicholas Bellinger 3738a85d667eSBart Van Assche put_unaligned_be32(add_len, &buf[4]); 3739c66ac9dbSNicholas Bellinger 37404949314cSAndy Grover transport_kunmap_data_sg(cmd); 374105d1c7c0SAndy Grover 3742c66ac9dbSNicholas Bellinger return 0; 3743c66ac9dbSNicholas Bellinger } 3744c66ac9dbSNicholas Bellinger 3745c66ac9dbSNicholas Bellinger /* 3746c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_IN Service Action READ_RESERVATION 3747c66ac9dbSNicholas Bellinger * 3748c66ac9dbSNicholas Bellinger * See spc4r17 section 5.7.6.3 and section 6.13.3.2 Table 161 and 162 3749c66ac9dbSNicholas Bellinger */ 3750de103c93SChristoph Hellwig static sense_reason_t 3751de103c93SChristoph Hellwig core_scsi3_pri_read_reservation(struct se_cmd *cmd) 3752c66ac9dbSNicholas Bellinger { 37530fd97ccfSChristoph Hellwig struct se_device *dev = cmd->se_dev; 3754c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 375505d1c7c0SAndy Grover unsigned char *buf; 3756c66ac9dbSNicholas Bellinger u64 pr_res_key; 3757c66ac9dbSNicholas Bellinger u32 add_len = 16; /* Hardcoded to 16 when a reservation is held. */ 3758c66ac9dbSNicholas Bellinger 3759c66ac9dbSNicholas Bellinger if (cmd->data_length < 8) { 37606708bb27SAndy Grover pr_err("PRIN SA READ_RESERVATIONS SCSI Data Length: %u" 3761c66ac9dbSNicholas Bellinger " too small\n", cmd->data_length); 3762de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 3763c66ac9dbSNicholas Bellinger } 3764c66ac9dbSNicholas Bellinger 37654949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3766de103c93SChristoph Hellwig if (!buf) 3767de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3768de103c93SChristoph Hellwig 3769a85d667eSBart Van Assche put_unaligned_be32(dev->t10_pr.pr_generation, &buf[0]); 3770c66ac9dbSNicholas Bellinger 37710fd97ccfSChristoph Hellwig spin_lock(&dev->dev_reservation_lock); 37720fd97ccfSChristoph Hellwig pr_reg = dev->dev_pr_res_holder; 3773ee1b1b9cSAndy Grover if (pr_reg) { 3774c66ac9dbSNicholas Bellinger /* 3775c66ac9dbSNicholas Bellinger * Set the hardcoded Additional Length 3776c66ac9dbSNicholas Bellinger */ 3777a85d667eSBart Van Assche put_unaligned_be32(add_len, &buf[4]); 3778c66ac9dbSNicholas Bellinger 377905d1c7c0SAndy Grover if (cmd->data_length < 22) 378005d1c7c0SAndy Grover goto err; 378105d1c7c0SAndy Grover 3782c66ac9dbSNicholas Bellinger /* 3783c66ac9dbSNicholas Bellinger * Set the Reservation key. 3784c66ac9dbSNicholas Bellinger * 3785c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.10: 3786c66ac9dbSNicholas Bellinger * A persistent reservation holder has its reservation key 3787c66ac9dbSNicholas Bellinger * returned in the parameter data from a PERSISTENT 3788c66ac9dbSNicholas Bellinger * RESERVE IN command with READ RESERVATION service action as 3789c66ac9dbSNicholas Bellinger * follows: 3790c66ac9dbSNicholas Bellinger * a) For a persistent reservation of the type Write Exclusive 3791c66ac9dbSNicholas Bellinger * - All Registrants or Exclusive Access All Regitrants, 3792c66ac9dbSNicholas Bellinger * the reservation key shall be set to zero; or 3793c66ac9dbSNicholas Bellinger * b) For all other persistent reservation types, the 3794c66ac9dbSNicholas Bellinger * reservation key shall be set to the registered 3795c66ac9dbSNicholas Bellinger * reservation key for the I_T nexus that holds the 3796c66ac9dbSNicholas Bellinger * persistent reservation. 3797c66ac9dbSNicholas Bellinger */ 3798c66ac9dbSNicholas Bellinger if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 3799c66ac9dbSNicholas Bellinger (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) 3800c66ac9dbSNicholas Bellinger pr_res_key = 0; 3801c66ac9dbSNicholas Bellinger else 3802c66ac9dbSNicholas Bellinger pr_res_key = pr_reg->pr_res_key; 3803c66ac9dbSNicholas Bellinger 3804a85d667eSBart Van Assche put_unaligned_be64(pr_res_key, &buf[8]); 3805c66ac9dbSNicholas Bellinger /* 3806c66ac9dbSNicholas Bellinger * Set the SCOPE and TYPE 3807c66ac9dbSNicholas Bellinger */ 3808c66ac9dbSNicholas Bellinger buf[21] = (pr_reg->pr_res_scope & 0xf0) | 3809c66ac9dbSNicholas Bellinger (pr_reg->pr_res_type & 0x0f); 3810c66ac9dbSNicholas Bellinger } 381105d1c7c0SAndy Grover 381205d1c7c0SAndy Grover err: 38130fd97ccfSChristoph Hellwig spin_unlock(&dev->dev_reservation_lock); 38144949314cSAndy Grover transport_kunmap_data_sg(cmd); 3815c66ac9dbSNicholas Bellinger 3816c66ac9dbSNicholas Bellinger return 0; 3817c66ac9dbSNicholas Bellinger } 3818c66ac9dbSNicholas Bellinger 3819c66ac9dbSNicholas Bellinger /* 3820c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_IN Service Action REPORT_CAPABILITIES 3821c66ac9dbSNicholas Bellinger * 3822c66ac9dbSNicholas Bellinger * See spc4r17 section 6.13.4 Table 165 3823c66ac9dbSNicholas Bellinger */ 3824de103c93SChristoph Hellwig static sense_reason_t 3825de103c93SChristoph Hellwig core_scsi3_pri_report_capabilities(struct se_cmd *cmd) 3826c66ac9dbSNicholas Bellinger { 38275951146dSAndy Grover struct se_device *dev = cmd->se_dev; 38280fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 382905d1c7c0SAndy Grover unsigned char *buf; 3830c66ac9dbSNicholas Bellinger u16 add_len = 8; /* Hardcoded to 8. */ 3831c66ac9dbSNicholas Bellinger 3832c66ac9dbSNicholas Bellinger if (cmd->data_length < 6) { 38336708bb27SAndy Grover pr_err("PRIN SA REPORT_CAPABILITIES SCSI Data Length:" 3834c66ac9dbSNicholas Bellinger " %u too small\n", cmd->data_length); 3835de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 3836c66ac9dbSNicholas Bellinger } 3837c66ac9dbSNicholas Bellinger 38384949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3839de103c93SChristoph Hellwig if (!buf) 3840de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 384105d1c7c0SAndy Grover 3842a85d667eSBart Van Assche put_unaligned_be16(add_len, &buf[0]); 3843c66ac9dbSNicholas Bellinger buf[2] |= 0x10; /* CRH: Compatible Reservation Hanlding bit. */ 3844c66ac9dbSNicholas Bellinger buf[2] |= 0x08; /* SIP_C: Specify Initiator Ports Capable bit */ 3845c66ac9dbSNicholas Bellinger buf[2] |= 0x04; /* ATP_C: All Target Ports Capable bit */ 3846c66ac9dbSNicholas Bellinger buf[2] |= 0x01; /* PTPL_C: Persistence across Target Power Loss bit */ 3847c66ac9dbSNicholas Bellinger /* 3848c66ac9dbSNicholas Bellinger * We are filling in the PERSISTENT RESERVATION TYPE MASK below, so 3849c66ac9dbSNicholas Bellinger * set the TMV: Task Mask Valid bit. 3850c66ac9dbSNicholas Bellinger */ 3851c66ac9dbSNicholas Bellinger buf[3] |= 0x80; 3852c66ac9dbSNicholas Bellinger /* 3853c66ac9dbSNicholas Bellinger * Change ALLOW COMMANDs to 0x20 or 0x40 later from Table 166 3854c66ac9dbSNicholas Bellinger */ 3855c66ac9dbSNicholas Bellinger buf[3] |= 0x10; /* ALLOW COMMANDs field 001b */ 3856c66ac9dbSNicholas Bellinger /* 3857c66ac9dbSNicholas Bellinger * PTPL_A: Persistence across Target Power Loss Active bit 3858c66ac9dbSNicholas Bellinger */ 3859c66ac9dbSNicholas Bellinger if (pr_tmpl->pr_aptpl_active) 3860c66ac9dbSNicholas Bellinger buf[3] |= 0x01; 3861c66ac9dbSNicholas Bellinger /* 3862c66ac9dbSNicholas Bellinger * Setup the PERSISTENT RESERVATION TYPE MASK from Table 167 3863c66ac9dbSNicholas Bellinger */ 3864c66ac9dbSNicholas Bellinger buf[4] |= 0x80; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ 3865c66ac9dbSNicholas Bellinger buf[4] |= 0x40; /* PR_TYPE_EXCLUSIVE_ACCESS_REGONLY */ 3866c66ac9dbSNicholas Bellinger buf[4] |= 0x20; /* PR_TYPE_WRITE_EXCLUSIVE_REGONLY */ 3867c66ac9dbSNicholas Bellinger buf[4] |= 0x08; /* PR_TYPE_EXCLUSIVE_ACCESS */ 3868c66ac9dbSNicholas Bellinger buf[4] |= 0x02; /* PR_TYPE_WRITE_EXCLUSIVE */ 3869c66ac9dbSNicholas Bellinger buf[5] |= 0x01; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ 3870c66ac9dbSNicholas Bellinger 38714949314cSAndy Grover transport_kunmap_data_sg(cmd); 387205d1c7c0SAndy Grover 3873c66ac9dbSNicholas Bellinger return 0; 3874c66ac9dbSNicholas Bellinger } 3875c66ac9dbSNicholas Bellinger 3876c66ac9dbSNicholas Bellinger /* 3877c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_IN Service Action READ_FULL_STATUS 3878c66ac9dbSNicholas Bellinger * 3879c66ac9dbSNicholas Bellinger * See spc4r17 section 6.13.5 Table 168 and 169 3880c66ac9dbSNicholas Bellinger */ 3881de103c93SChristoph Hellwig static sense_reason_t 3882de103c93SChristoph Hellwig core_scsi3_pri_read_full_status(struct se_cmd *cmd) 3883c66ac9dbSNicholas Bellinger { 38840fd97ccfSChristoph Hellwig struct se_device *dev = cmd->se_dev; 3885c66ac9dbSNicholas Bellinger struct se_node_acl *se_nacl; 3886c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg; 3887c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp; 38880fd97ccfSChristoph Hellwig struct t10_reservation *pr_tmpl = &dev->t10_pr; 388905d1c7c0SAndy Grover unsigned char *buf; 38902650d71eSChristoph Hellwig u32 add_desc_len = 0, add_len = 0; 3891c66ac9dbSNicholas Bellinger u32 off = 8; /* off into first Full Status descriptor */ 3892d16ca7c5SNicholas Bellinger int format_code = 0, pr_res_type = 0, pr_res_scope = 0; 38932650d71eSChristoph Hellwig int exp_desc_len, desc_len; 3894d16ca7c5SNicholas Bellinger bool all_reg = false; 3895c66ac9dbSNicholas Bellinger 3896c66ac9dbSNicholas Bellinger if (cmd->data_length < 8) { 38976708bb27SAndy Grover pr_err("PRIN SA READ_FULL_STATUS SCSI Data Length: %u" 3898c66ac9dbSNicholas Bellinger " too small\n", cmd->data_length); 3899de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 3900c66ac9dbSNicholas Bellinger } 3901c66ac9dbSNicholas Bellinger 39024949314cSAndy Grover buf = transport_kmap_data_sg(cmd); 3903de103c93SChristoph Hellwig if (!buf) 3904de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 390505d1c7c0SAndy Grover 3906a85d667eSBart Van Assche put_unaligned_be32(dev->t10_pr.pr_generation, &buf[0]); 3907c66ac9dbSNicholas Bellinger 3908d16ca7c5SNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 3909d16ca7c5SNicholas Bellinger if (dev->dev_pr_res_holder) { 3910d16ca7c5SNicholas Bellinger struct t10_pr_registration *pr_holder = dev->dev_pr_res_holder; 3911d16ca7c5SNicholas Bellinger 3912d16ca7c5SNicholas Bellinger if (pr_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG || 3913d16ca7c5SNicholas Bellinger pr_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG) { 3914d16ca7c5SNicholas Bellinger all_reg = true; 3915d16ca7c5SNicholas Bellinger pr_res_type = pr_holder->pr_res_type; 3916d16ca7c5SNicholas Bellinger pr_res_scope = pr_holder->pr_res_scope; 3917d16ca7c5SNicholas Bellinger } 3918d16ca7c5SNicholas Bellinger } 3919d16ca7c5SNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3920d16ca7c5SNicholas Bellinger 3921c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 3922c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 3923c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 3924c66ac9dbSNicholas Bellinger 3925c66ac9dbSNicholas Bellinger se_nacl = pr_reg->pr_reg_nacl; 3926c66ac9dbSNicholas Bellinger se_tpg = pr_reg->pr_reg_nacl->se_tpg; 3927c66ac9dbSNicholas Bellinger add_desc_len = 0; 3928c66ac9dbSNicholas Bellinger 392933940d09SJoern Engel atomic_inc_mb(&pr_reg->pr_res_holders); 3930c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 3931c66ac9dbSNicholas Bellinger /* 3932c66ac9dbSNicholas Bellinger * Determine expected length of $FABRIC_MOD specific 3933c66ac9dbSNicholas Bellinger * TransportID full status descriptor.. 3934c66ac9dbSNicholas Bellinger */ 39352650d71eSChristoph Hellwig exp_desc_len = target_get_pr_transport_id_len(se_nacl, pr_reg, 39362650d71eSChristoph Hellwig &format_code); 39372650d71eSChristoph Hellwig if (exp_desc_len < 0 || 39382650d71eSChristoph Hellwig exp_desc_len + add_len > cmd->data_length) { 39396708bb27SAndy Grover pr_warn("SPC-3 PRIN READ_FULL_STATUS ran" 3940c66ac9dbSNicholas Bellinger " out of buffer: %d\n", cmd->data_length); 3941c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 394233940d09SJoern Engel atomic_dec_mb(&pr_reg->pr_res_holders); 3943c66ac9dbSNicholas Bellinger break; 3944c66ac9dbSNicholas Bellinger } 3945c66ac9dbSNicholas Bellinger /* 3946c66ac9dbSNicholas Bellinger * Set RESERVATION KEY 3947c66ac9dbSNicholas Bellinger */ 3948a85d667eSBart Van Assche put_unaligned_be64(pr_reg->pr_res_key, &buf[off]); 3949a85d667eSBart Van Assche off += 8; 3950c66ac9dbSNicholas Bellinger off += 4; /* Skip Over Reserved area */ 3951c66ac9dbSNicholas Bellinger 3952c66ac9dbSNicholas Bellinger /* 3953c66ac9dbSNicholas Bellinger * Set ALL_TG_PT bit if PROUT SA REGISTER had this set. 3954c66ac9dbSNicholas Bellinger */ 3955c66ac9dbSNicholas Bellinger if (pr_reg->pr_reg_all_tg_pt) 3956c66ac9dbSNicholas Bellinger buf[off] = 0x02; 3957c66ac9dbSNicholas Bellinger /* 3958c66ac9dbSNicholas Bellinger * The struct se_lun pointer will be present for the 3959c66ac9dbSNicholas Bellinger * reservation holder for PR_HOLDER bit. 3960c66ac9dbSNicholas Bellinger * 3961c66ac9dbSNicholas Bellinger * Also, if this registration is the reservation 3962d16ca7c5SNicholas Bellinger * holder or there is an All Registrants reservation 3963d16ca7c5SNicholas Bellinger * active, fill in SCOPE and TYPE in the next byte. 3964c66ac9dbSNicholas Bellinger */ 3965c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_holder) { 3966c66ac9dbSNicholas Bellinger buf[off++] |= 0x01; 3967c66ac9dbSNicholas Bellinger buf[off++] = (pr_reg->pr_res_scope & 0xf0) | 3968c66ac9dbSNicholas Bellinger (pr_reg->pr_res_type & 0x0f); 3969d16ca7c5SNicholas Bellinger } else if (all_reg) { 3970d16ca7c5SNicholas Bellinger buf[off++] |= 0x01; 3971d16ca7c5SNicholas Bellinger buf[off++] = (pr_res_scope & 0xf0) | 3972d16ca7c5SNicholas Bellinger (pr_res_type & 0x0f); 3973d16ca7c5SNicholas Bellinger } else { 3974c66ac9dbSNicholas Bellinger off += 2; 3975d16ca7c5SNicholas Bellinger } 3976c66ac9dbSNicholas Bellinger 3977c66ac9dbSNicholas Bellinger off += 4; /* Skip over reserved area */ 3978c66ac9dbSNicholas Bellinger /* 3979c66ac9dbSNicholas Bellinger * From spc4r17 6.3.15: 3980c66ac9dbSNicholas Bellinger * 3981c66ac9dbSNicholas Bellinger * If the ALL_TG_PT bit set to zero, the RELATIVE TARGET PORT 3982c66ac9dbSNicholas Bellinger * IDENTIFIER field contains the relative port identifier (see 3983c66ac9dbSNicholas Bellinger * 3.1.120) of the target port that is part of the I_T nexus 3984c66ac9dbSNicholas Bellinger * described by this full status descriptor. If the ALL_TG_PT 3985c66ac9dbSNicholas Bellinger * bit is set to one, the contents of the RELATIVE TARGET PORT 3986c66ac9dbSNicholas Bellinger * IDENTIFIER field are not defined by this standard. 3987c66ac9dbSNicholas Bellinger */ 39886708bb27SAndy Grover if (!pr_reg->pr_reg_all_tg_pt) { 398979dc9c9eSNicholas Bellinger u16 sep_rtpi = pr_reg->tg_pt_sep_rtpi; 3990c66ac9dbSNicholas Bellinger 3991a85d667eSBart Van Assche put_unaligned_be16(sep_rtpi, &buf[off]); 3992a85d667eSBart Van Assche off += 2; 3993c66ac9dbSNicholas Bellinger } else 399435d1efe8SMasanari Iida off += 2; /* Skip over RELATIVE TARGET PORT IDENTIFIER */ 3995c66ac9dbSNicholas Bellinger 39962650d71eSChristoph Hellwig buf[off+4] = se_tpg->proto_id; 39972650d71eSChristoph Hellwig 3998c66ac9dbSNicholas Bellinger /* 39992650d71eSChristoph Hellwig * Now, have the $FABRIC_MOD fill in the transport ID. 4000c66ac9dbSNicholas Bellinger */ 40012650d71eSChristoph Hellwig desc_len = target_get_pr_transport_id(se_nacl, pr_reg, 40022650d71eSChristoph Hellwig &format_code, &buf[off+4]); 4003c66ac9dbSNicholas Bellinger 4004c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 400533940d09SJoern Engel atomic_dec_mb(&pr_reg->pr_res_holders); 40062650d71eSChristoph Hellwig 40072650d71eSChristoph Hellwig if (desc_len < 0) 40082650d71eSChristoph Hellwig break; 4009c66ac9dbSNicholas Bellinger /* 4010c66ac9dbSNicholas Bellinger * Set the ADDITIONAL DESCRIPTOR LENGTH 4011c66ac9dbSNicholas Bellinger */ 4012a85d667eSBart Van Assche put_unaligned_be32(desc_len, &buf[off]); 4013c66ac9dbSNicholas Bellinger /* 4014c66ac9dbSNicholas Bellinger * Size of full desctipor header minus TransportID 4015c66ac9dbSNicholas Bellinger * containing $FABRIC_MOD specific) initiator device/port 4016c66ac9dbSNicholas Bellinger * WWN information. 4017c66ac9dbSNicholas Bellinger * 4018c66ac9dbSNicholas Bellinger * See spc4r17 Section 6.13.5 Table 169 4019c66ac9dbSNicholas Bellinger */ 4020c66ac9dbSNicholas Bellinger add_desc_len = (24 + desc_len); 4021c66ac9dbSNicholas Bellinger 4022c66ac9dbSNicholas Bellinger off += desc_len; 4023c66ac9dbSNicholas Bellinger add_len += add_desc_len; 4024c66ac9dbSNicholas Bellinger } 4025c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 4026c66ac9dbSNicholas Bellinger /* 4027c66ac9dbSNicholas Bellinger * Set ADDITIONAL_LENGTH 4028c66ac9dbSNicholas Bellinger */ 4029a85d667eSBart Van Assche put_unaligned_be32(add_len, &buf[4]); 4030c66ac9dbSNicholas Bellinger 40314949314cSAndy Grover transport_kunmap_data_sg(cmd); 403205d1c7c0SAndy Grover 4033c66ac9dbSNicholas Bellinger return 0; 4034c66ac9dbSNicholas Bellinger } 4035c66ac9dbSNicholas Bellinger 4036de103c93SChristoph Hellwig sense_reason_t 4037de103c93SChristoph Hellwig target_scsi3_emulate_pr_in(struct se_cmd *cmd) 4038c66ac9dbSNicholas Bellinger { 4039de103c93SChristoph Hellwig sense_reason_t ret; 4040e76a35d6SChristoph Hellwig 4041617c0e06SChristoph Hellwig /* 4042617c0e06SChristoph Hellwig * Following spc2r20 5.5.1 Reservations overview: 4043617c0e06SChristoph Hellwig * 4044617c0e06SChristoph Hellwig * If a logical unit has been reserved by any RESERVE command and is 4045617c0e06SChristoph Hellwig * still reserved by any initiator, all PERSISTENT RESERVE IN and all 4046617c0e06SChristoph Hellwig * PERSISTENT RESERVE OUT commands shall conflict regardless of 4047617c0e06SChristoph Hellwig * initiator or service action and shall terminate with a RESERVATION 4048617c0e06SChristoph Hellwig * CONFLICT status. 4049617c0e06SChristoph Hellwig */ 40500fd97ccfSChristoph Hellwig if (cmd->se_dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) { 4051617c0e06SChristoph Hellwig pr_err("Received PERSISTENT_RESERVE CDB while legacy" 4052617c0e06SChristoph Hellwig " SPC-2 reservation is held, returning" 4053617c0e06SChristoph Hellwig " RESERVATION_CONFLICT\n"); 4054de103c93SChristoph Hellwig return TCM_RESERVATION_CONFLICT; 4055617c0e06SChristoph Hellwig } 4056617c0e06SChristoph Hellwig 4057617c0e06SChristoph Hellwig switch (cmd->t_task_cdb[1] & 0x1f) { 4058c66ac9dbSNicholas Bellinger case PRI_READ_KEYS: 4059d29a5b6aSChristoph Hellwig ret = core_scsi3_pri_read_keys(cmd); 4060d29a5b6aSChristoph Hellwig break; 4061c66ac9dbSNicholas Bellinger case PRI_READ_RESERVATION: 4062d29a5b6aSChristoph Hellwig ret = core_scsi3_pri_read_reservation(cmd); 4063d29a5b6aSChristoph Hellwig break; 4064c66ac9dbSNicholas Bellinger case PRI_REPORT_CAPABILITIES: 4065d29a5b6aSChristoph Hellwig ret = core_scsi3_pri_report_capabilities(cmd); 4066d29a5b6aSChristoph Hellwig break; 4067c66ac9dbSNicholas Bellinger case PRI_READ_FULL_STATUS: 4068d29a5b6aSChristoph Hellwig ret = core_scsi3_pri_read_full_status(cmd); 4069d29a5b6aSChristoph Hellwig break; 4070c66ac9dbSNicholas Bellinger default: 40716708bb27SAndy Grover pr_err("Unknown PERSISTENT_RESERVE_IN service" 4072617c0e06SChristoph Hellwig " action: 0x%02x\n", cmd->t_task_cdb[1] & 0x1f); 4073de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 4074c66ac9dbSNicholas Bellinger } 4075d29a5b6aSChristoph Hellwig 40766bb35e00SChristoph Hellwig if (!ret) 40776bb35e00SChristoph Hellwig target_complete_cmd(cmd, GOOD); 4078d29a5b6aSChristoph Hellwig return ret; 4079c66ac9dbSNicholas Bellinger } 4080c66ac9dbSNicholas Bellinger 4081de103c93SChristoph Hellwig sense_reason_t 4082de103c93SChristoph Hellwig target_check_reservation(struct se_cmd *cmd) 4083c66ac9dbSNicholas Bellinger { 4084d977f437SChristoph Hellwig struct se_device *dev = cmd->se_dev; 4085de103c93SChristoph Hellwig sense_reason_t ret; 4086d977f437SChristoph Hellwig 4087d977f437SChristoph Hellwig if (!cmd->se_sess) 4088c66ac9dbSNicholas Bellinger return 0; 4089d977f437SChristoph Hellwig if (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE) 4090c66ac9dbSNicholas Bellinger return 0; 40914ec5bf0eSBryant G. Ly if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 4092d977f437SChristoph Hellwig return 0; 4093c66ac9dbSNicholas Bellinger 4094d977f437SChristoph Hellwig spin_lock(&dev->dev_reservation_lock); 4095d977f437SChristoph Hellwig if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 4096d977f437SChristoph Hellwig ret = target_scsi2_reservation_check(cmd); 4097d977f437SChristoph Hellwig else 4098d977f437SChristoph Hellwig ret = target_scsi3_pr_reservation_check(cmd); 4099d977f437SChristoph Hellwig spin_unlock(&dev->dev_reservation_lock); 41000fd97ccfSChristoph Hellwig 4101d977f437SChristoph Hellwig return ret; 4102c66ac9dbSNicholas Bellinger } 4103